The Tor Browser: dom/system/gonk/ril_worker.js@b8a032363ba2 (annotated)

dom/system/gonk/ril_worker.js@b8a032363ba2 (annotated)

dom/system/gonk/ril_worker.js

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* Copyright 2012 Mozilla Foundation and Mozilla contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 /**
  * This file implements the RIL worker thread. It communicates with
  * the main thread to provide a high-level API to the phone's RIL
  * stack, and with the RIL IPC thread to communicate with the RIL
  * device itself. These communication channels use message events as
  * known from Web Workers:
  *
  * - postMessage()/"message" events for main thread communication
  *
  * - postRILMessage()/"RILMessageEvent" events for RIL IPC thread
  *   communication.
  *
  * The two main objects in this file represent individual parts of this
  * communication chain:
  *
  * - RILMessageEvent -> Buf -> RIL -> postMessage() -> nsIRadioInterfaceLayer
  * - nsIRadioInterfaceLayer -> postMessage() -> RIL -> Buf -> postRILMessage()
  *
  * Note: The code below is purposely lean on abstractions to be as lean in
  * terms of object allocations. As a result, it may look more like C than
  * JavaScript, and that's intended.
  */
 "use strict";
 importScripts("ril_consts.js");
 importScripts("resource://gre/modules/workers/require.js");
 // set to true in ril_consts.js to see debug messages
 let DEBUG = DEBUG_WORKER;
 let GLOBAL = this;
 if (!this.debug) {
   // Debugging stub that goes nowhere.
   this.debug = function debug(message) {
     dump("RIL Worker: " + message + "\n");
   };
 }
 let RIL_CELLBROADCAST_DISABLED;
 let RIL_CLIR_MODE;
 let RIL_EMERGENCY_NUMBERS;
 const DEFAULT_EMERGENCY_NUMBERS = ["112", "911"];
 // Timeout value for emergency callback mode.
 const EMERGENCY_CB_MODE_TIMEOUT_MS = 300000;  // 5 mins = 300000 ms.
 const ICC_MAX_LINEAR_FIXED_RECORDS = 0xfe;
 // MMI match groups
 const MMI_MATCH_GROUP_FULL_MMI = 1;
 const MMI_MATCH_GROUP_MMI_PROCEDURE = 2;
 const MMI_MATCH_GROUP_SERVICE_CODE = 3;
 const MMI_MATCH_GROUP_SIA = 5;
 const MMI_MATCH_GROUP_SIB = 7;
 const MMI_MATCH_GROUP_SIC = 9;
 const MMI_MATCH_GROUP_PWD_CONFIRM = 11;
 const MMI_MATCH_GROUP_DIALING_NUMBER = 12;
 const MMI_MAX_LENGTH_SHORT_CODE = 2;
 const MMI_END_OF_USSD = "#";
 // Should match the value we set in dom/telephony/TelephonyCommon.h
 const OUTGOING_PLACEHOLDER_CALL_INDEX = 0xffffffff;
 let RILQUIRKS_CALLSTATE_EXTRA_UINT32;
 // This may change at runtime since in RIL v6 and later, we get the version
 // number via the UNSOLICITED_RIL_CONNECTED parcel.
 let RILQUIRKS_V5_LEGACY;
 let RILQUIRKS_REQUEST_USE_DIAL_EMERGENCY_CALL;
 let RILQUIRKS_SIM_APP_STATE_EXTRA_FIELDS;
 // Needed for call-waiting on Peak device
 let RILQUIRKS_EXTRA_UINT32_2ND_CALL;
 // On the emulator we support querying the number of lock retries
 let RILQUIRKS_HAVE_QUERY_ICC_LOCK_RETRY_COUNT;
 // Ril quirk to Send STK Profile Download
 let RILQUIRKS_SEND_STK_PROFILE_DOWNLOAD;
 // Ril quirk to attach data registration on demand.
 let RILQUIRKS_DATA_REGISTRATION_ON_DEMAND;
 function BufObject(aContext) {
   this.context = aContext;
 }
 BufObject.prototype = {
   context: null,
   mToken: 0,
   mTokenRequestMap: null,
   init: function() {
     this._init();
     // This gets incremented each time we send out a parcel.
     this.mToken = 1;
     // Maps tokens we send out with requests to the request type, so that
     // when we get a response parcel back, we know what request it was for.
     this.mTokenRequestMap = new Map();
   },
   /**
    * Process one parcel.
    */
   processParcel: function() {
     let response_type = this.readInt32();
     let request_type, options;
     if (response_type == RESPONSE_TYPE_SOLICITED) {
       let token = this.readInt32();
       let error = this.readInt32();
       options = this.mTokenRequestMap.get(token);
       if (!options) {
         if (DEBUG) {
           this.context.debug("Suspicious uninvited request found: " +
                              token + ". Ignored!");
         }
         return;
       }
       this.mTokenRequestMap.delete(token);
       request_type = options.rilRequestType;
       options.rilRequestError = error;
       if (DEBUG) {
         this.context.debug("Solicited response for request type " + request_type +
                            ", token " + token + ", error " + error);
       }
     } else if (response_type == RESPONSE_TYPE_UNSOLICITED) {
       request_type = this.readInt32();
       if (DEBUG) {
         this.context.debug("Unsolicited response for request type " + request_type);
       }
     } else {
       if (DEBUG) {
         this.context.debug("Unknown response type: " + response_type);
       }
       return;
     }
     this.context.RIL.handleParcel(request_type, this.readAvailable, options);
   },
   /**
    * Start a new outgoing parcel.
    *
    * @param type
    *        Integer specifying the request type.
    * @param options [optional]
    *        Object containing information about the request, e.g. the
    *        original main thread message object that led to the RIL request.
    */
   newParcel: function(type, options) {
     if (DEBUG) this.context.debug("New outgoing parcel of type " + type);
     // We're going to leave room for the parcel size at the beginning.
     this.outgoingIndex = this.PARCEL_SIZE_SIZE;
     this.writeInt32(type);
     this.writeInt32(this.mToken);
     if (!options) {
       options = {};
     }
     options.rilRequestType = type;
     options.rilRequestError = null;
     this.mTokenRequestMap.set(this.mToken, options);
     this.mToken++;
     return this.mToken;
   },
   simpleRequest: function(type, options) {
     this.newParcel(type, options);
     this.sendParcel();
   },
   onSendParcel: function(parcel) {
     postRILMessage(this.context.clientId, parcel);
   }
 };
 (function() {
   let base = require("resource://gre/modules/workers/worker_buf.js").Buf;
   for (let p in base) {
     BufObject.prototype[p] = base[p];
   }
 })();
 /**
  * The RIL state machine.
  *
  * This object communicates with rild via parcels and with the main thread
  * via post messages. It maintains state about the radio, ICC, calls, etc.
  * and acts upon state changes accordingly.
  */
 function RilObject(aContext) {
   this.context = aContext;
   this.currentCalls = {};
   this.currentConference = {state: null, participants: {}};
   this.currentDataCalls = {};
   this._pendingSentSmsMap = {};
   this.pendingNetworkType = {};
   this._receivedSmsCbPagesMap = {};
   // Init properties that are only initialized once.
   this.v5Legacy = RILQUIRKS_V5_LEGACY;
   this.cellBroadcastDisabled = RIL_CELLBROADCAST_DISABLED;
   this.clirMode = RIL_CLIR_MODE;
 }
 RilObject.prototype = {
   context: null,
   v5Legacy: null,
   /**
    * Valid calls.
    */
   currentCalls: null,
   /**
    * Existing conference call and its participants.
    */
   currentConference: null,
   /**
    * Existing data calls.
    */
   currentDataCalls: null,
   /**
    * Outgoing messages waiting for SMS-STATUS-REPORT.
    */
   _pendingSentSmsMap: null,
   /**
    * Index of the RIL_PREFERRED_NETWORK_TYPE_TO_GECKO. Its value should be
    * preserved over rild reset.
    */
   preferredNetworkType: null,
   /**
    * Marker object.
    */
   pendingNetworkType: null,
   /**
    * Global Cell Broadcast switch.
    */
   cellBroadcastDisabled: false,
   /**
    * Global CLIR mode settings.
    */
   clirMode: CLIR_DEFAULT,
   /**
    * Parsed Cell Broadcast search lists.
    * cellBroadcastConfigs.MMI should be preserved over rild reset.
    */
   cellBroadcastConfigs: null,
   mergedCellBroadcastConfig: null,
   _receivedSmsCbPagesMap: null,
   initRILState: function() {
     /**
      * One of the RADIO_STATE_* constants.
      */
     this.radioState = GECKO_RADIOSTATE_UNAVAILABLE;
     /**
      * True if we are on a CDMA phone.
      */
     this._isCdma = false;
     /**
      * True if we are in emergency callback mode.
      */
     this._isInEmergencyCbMode = false;
     /**
      * Set when radio is ready but radio tech is unknown. That is, we are
      * waiting for REQUEST_VOICE_RADIO_TECH
      */
     this._waitingRadioTech = false;
     /**
      * ICC status. Keeps a reference of the data response to the
      * getICCStatus request.
      */
     this.iccStatus = null;
     /**
      * Card state
      */
     this.cardState = GECKO_CARDSTATE_UNINITIALIZED;
     /**
      * Strings
      */
     this.IMEI = null;
     this.IMEISV = null;
     this.ESN = null;
     this.MEID = null;
     this.SMSC = null;
     /**
      * ICC information that is not exposed to Gaia.
      */
     this.iccInfoPrivate = {};
     /**
      * ICC information, such as MSISDN, MCC, MNC, SPN...etc.
      */
     this.iccInfo = {};
     /**
      * CDMA specific information. ex. CDMA Network ID, CDMA System ID... etc.
      */
     this.cdmaHome = null;
     /**
      * Application identification for apps in ICC.
      */
     this.aid = null;
     /**
      * Application type for apps in ICC.
      */
     this.appType = null;
     this.networkSelectionMode = null;
     this.voiceRegistrationState = {};
     this.dataRegistrationState = {};
     /**
      * List of strings identifying the network operator.
      */
     this.operator = null;
     /**
      * String containing the baseband version.
      */
     this.basebandVersion = null;
     // Clean up this.currentCalls: rild might have restarted.
     for each (let currentCall in this.currentCalls) {
       delete this.currentCalls[currentCall.callIndex];
       this._handleDisconnectedCall(currentCall);
     }
     // Deactivate this.currentDataCalls: rild might have restarted.
     for each (let datacall in this.currentDataCalls) {
       this.deactivateDataCall(datacall);
     }
     // Don't clean up this._pendingSentSmsMap
     // because on rild restart: we may continue with the pending segments.
     /**
      * Whether or not the multiple requests in requestNetworkInfo() are currently
      * being processed
      */
     this._processingNetworkInfo = false;
     /**
      * Multiple requestNetworkInfo() in a row before finishing the first
      * request, hence we need to fire requestNetworkInfo() again after
      * gathering all necessary stuffs. This is to make sure that ril_worker
      * gets precise network information.
      */
     this._needRepollNetworkInfo = false;
     /**
      * Pending messages to be send in batch from requestNetworkInfo()
      */
     this._pendingNetworkInfo = {rilMessageType: "networkinfochanged"};
     /**
      * USSD session flag.
      * Only one USSD session may exist at a time, and the session is assumed
      * to exist until:
      *    a) There's a call to cancelUSSD()
      *    b) The implementation sends a UNSOLICITED_ON_USSD with a type code
      *       of "0" (USSD-Notify/no further action) or "2" (session terminated)
      */
     this._ussdSession = null;
    /**
     * Regular expresion to parse MMI codes.
     */
     this._mmiRegExp = null;
     /**
      * Cell Broadcast Search Lists.
      */
     let cbmmi = this.cellBroadcastConfigs && this.cellBroadcastConfigs.MMI;
     this.cellBroadcastConfigs = {
       MMI: cbmmi || null
     };
     this.mergedCellBroadcastConfig = null;
   },
   /**
    * Parse an integer from a string, falling back to a default value
    * if the the provided value is not a string or does not contain a valid
    * number.
    *
    * @param string
    *        String to be parsed.
    * @param defaultValue [optional]
    *        Default value to be used.
    * @param radix [optional]
    *        A number that represents the numeral system to be used. Default 10.
    */
   parseInt: function(string, defaultValue, radix) {
     let number = parseInt(string, radix || 10);
     if (!isNaN(number)) {
       return number;
     }
     if (defaultValue === undefined) {
       defaultValue = null;
     }
     return defaultValue;
   },
   /**
    * Outgoing requests to the RIL. These can be triggered from the
    * main thread via messages that look like this:
    *
    *   {rilMessageType: "methodName",
    *    extra:          "parameters",
    *    go:             "here"}
    *
    * So if one of the following methods takes arguments, it takes only one,
    * an object, which then contains all of the parameters as attributes.
    * The "@param" documentation is to be interpreted accordingly.
    */
   /**
    * Retrieve the ICC's status.
    */
   getICCStatus: function() {
     this.context.Buf.simpleRequest(REQUEST_GET_SIM_STATUS);
   },
   /**
    * Helper function for unlocking ICC locks.
    */
   iccUnlockCardLock: function(options) {
     switch (options.lockType) {
       case GECKO_CARDLOCK_PIN:
         this.enterICCPIN(options);
         break;
       case GECKO_CARDLOCK_PIN2:
         this.enterICCPIN2(options);
         break;
       case GECKO_CARDLOCK_PUK:
         this.enterICCPUK(options);
         break;
       case GECKO_CARDLOCK_PUK2:
         this.enterICCPUK2(options);
         break;
       case GECKO_CARDLOCK_NCK:
       case GECKO_CARDLOCK_NCK1:
       case GECKO_CARDLOCK_NCK2:
       case GECKO_CARDLOCK_HNCK:
       case GECKO_CARDLOCK_CCK:
       case GECKO_CARDLOCK_SPCK:
       case GECKO_CARDLOCK_RCCK: // Fall through.
       case GECKO_CARDLOCK_RSPCK: {
         let type = GECKO_PERSO_LOCK_TO_CARD_PERSO_LOCK[options.lockType];
         this.enterDepersonalization(type, options.pin, options);
         break;
       }
       case GECKO_CARDLOCK_NCK_PUK:
       case GECKO_CARDLOCK_NCK1_PUK:
       case GECKO_CARDLOCK_NCK2_PUK:
       case GECKO_CARDLOCK_HNCK_PUK:
       case GECKO_CARDLOCK_CCK_PUK:
       case GECKO_CARDLOCK_SPCK_PUK:
       case GECKO_CARDLOCK_RCCK_PUK: // Fall through.
       case GECKO_CARDLOCK_RSPCK_PUK: {
         let type = GECKO_PERSO_LOCK_TO_CARD_PERSO_LOCK[options.lockType];
         this.enterDepersonalization(type, options.puk, options);
         break;
       }
       default:
         options.errorMsg = "Unsupported Card Lock.";
         options.success = false;
         this.sendChromeMessage(options);
     }
   },
   /**
    * Enter a PIN to unlock the ICC.
    *
    * @param pin
    *        String containing the PIN.
    * @param [optional] aid
    *        AID value.
    */
   enterICCPIN: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_ENTER_SIM_PIN, options);
     Buf.writeInt32(this.v5Legacy ? 1 : 2);
     Buf.writeString(options.pin);
     if (!this.v5Legacy) {
       Buf.writeString(options.aid || this.aid);
     }
     Buf.sendParcel();
   },
   /**
    * Enter a PIN2 to unlock the ICC.
    *
    * @param pin
    *        String containing the PIN2.
    * @param [optional] aid
    *        AID value.
    */
   enterICCPIN2: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_ENTER_SIM_PIN2, options);
     Buf.writeInt32(this.v5Legacy ? 1 : 2);
     Buf.writeString(options.pin);
     if (!this.v5Legacy) {
       Buf.writeString(options.aid || this.aid);
     }
     Buf.sendParcel();
   },
   /**
    * Requests a network personalization be deactivated.
    *
    * @param type
    *        Integer indicating the network personalization be deactivated.
    * @param password
    *        String containing the password.
    */
   enterDepersonalization: function(type, password, options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_ENTER_NETWORK_DEPERSONALIZATION_CODE, options);
     Buf.writeInt32(type);
     Buf.writeString(password);
     Buf.sendParcel();
   },
   /**
    * Helper function for changing ICC locks.
    */
   iccSetCardLock: function(options) {
     if (options.newPin !== undefined) { // Change PIN lock.
       switch (options.lockType) {
         case GECKO_CARDLOCK_PIN:
           this.changeICCPIN(options);
           break;
         case GECKO_CARDLOCK_PIN2:
           this.changeICCPIN2(options);
           break;
         default:
           options.errorMsg = "Unsupported Card Lock.";
           options.success = false;
           this.sendChromeMessage(options);
       }
     } else { // Enable/Disable lock.
       switch (options.lockType) {
         case GECKO_CARDLOCK_PIN:
           options.facility = ICC_CB_FACILITY_SIM;
           options.password = options.pin;
           break;
         case GECKO_CARDLOCK_FDN:
           options.facility = ICC_CB_FACILITY_FDN;
           options.password = options.pin2;
           break;
         default:
           options.errorMsg = "Unsupported Card Lock.";
           options.success = false;
           this.sendChromeMessage(options);
           return;
       }
       options.enabled = options.enabled;
       options.serviceClass = ICC_SERVICE_CLASS_VOICE |
                              ICC_SERVICE_CLASS_DATA  |
                              ICC_SERVICE_CLASS_FAX;
       this.setICCFacilityLock(options);
     }
   },
   /**
    * Change the current ICC PIN number.
    *
    * @param pin
    *        String containing the old PIN value
    * @param newPin
    *        String containing the new PIN value
    * @param [optional] aid
    *        AID value.
    */
   changeICCPIN: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_CHANGE_SIM_PIN, options);
     Buf.writeInt32(this.v5Legacy ? 2 : 3);
     Buf.writeString(options.pin);
     Buf.writeString(options.newPin);
     if (!this.v5Legacy) {
       Buf.writeString(options.aid || this.aid);
     }
     Buf.sendParcel();
   },
   /**
    * Change the current ICC PIN2 number.
    *
    * @param pin
    *        String containing the old PIN2 value
    * @param newPin
    *        String containing the new PIN2 value
    * @param [optional] aid
    *        AID value.
    */
   changeICCPIN2: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_CHANGE_SIM_PIN2, options);
     Buf.writeInt32(this.v5Legacy ? 2 : 3);
     Buf.writeString(options.pin);
     Buf.writeString(options.newPin);
     if (!this.v5Legacy) {
       Buf.writeString(options.aid || this.aid);
     }
     Buf.sendParcel();
   },
   /**
    * Supplies ICC PUK and a new PIN to unlock the ICC.
    *
    * @param puk
    *        String containing the PUK value.
    * @param newPin
    *        String containing the new PIN value.
    * @param [optional] aid
    *        AID value.
    */
    enterICCPUK: function(options) {
      let Buf = this.context.Buf;
      Buf.newParcel(REQUEST_ENTER_SIM_PUK, options);
      Buf.writeInt32(this.v5Legacy ? 2 : 3);
      Buf.writeString(options.puk);
      Buf.writeString(options.newPin);
      if (!this.v5Legacy) {
        Buf.writeString(options.aid || this.aid);
      }
      Buf.sendParcel();
    },
   /**
    * Supplies ICC PUK2 and a new PIN2 to unlock the ICC.
    *
    * @param puk
    *        String containing the PUK2 value.
    * @param newPin
    *        String containing the new PIN2 value.
    * @param [optional] aid
    *        AID value.
    */
    enterICCPUK2: function(options) {
      let Buf = this.context.Buf;
      Buf.newParcel(REQUEST_ENTER_SIM_PUK2, options);
      Buf.writeInt32(this.v5Legacy ? 2 : 3);
      Buf.writeString(options.puk);
      Buf.writeString(options.newPin);
      if (!this.v5Legacy) {
        Buf.writeString(options.aid || this.aid);
      }
      Buf.sendParcel();
    },
   /**
    * Helper function for fetching the state of ICC locks.
    */
   iccGetCardLockState: function(options) {
     switch (options.lockType) {
       case GECKO_CARDLOCK_PIN:
         options.facility = ICC_CB_FACILITY_SIM;
         break;
       case GECKO_CARDLOCK_FDN:
         options.facility = ICC_CB_FACILITY_FDN;
         break;
       default:
         options.errorMsg = "Unsupported Card Lock.";
         options.success = false;
         this.sendChromeMessage(options);
         return;
     }
     options.password = ""; // For query no need to provide pin.
     options.serviceClass = ICC_SERVICE_CLASS_VOICE |
                            ICC_SERVICE_CLASS_DATA  |
                            ICC_SERVICE_CLASS_FAX;
     this.queryICCFacilityLock(options);
   },
   /**
    * Helper function for fetching the number of unlock retries of ICC locks.
    *
    * We only query the retry count when we're on the emulator. The phones do
    * not support the request id and their rild doesn't return an error.
    */
   iccGetCardLockRetryCount: function(options) {
     var selCode = {
       pin: ICC_SEL_CODE_SIM_PIN,
       puk: ICC_SEL_CODE_SIM_PUK,
       pin2: ICC_SEL_CODE_SIM_PIN2,
       puk2: ICC_SEL_CODE_SIM_PUK2,
       nck: ICC_SEL_CODE_PH_NET_PIN,
       cck: ICC_SEL_CODE_PH_CORP_PIN,
       spck: ICC_SEL_CODE_PH_SP_PIN
     };
     if (typeof(selCode[options.lockType]) === 'undefined') {
       /* unknown lock type */
       options.errorMsg = GECKO_ERROR_GENERIC_FAILURE;
       options.success = false;
       this.sendChromeMessage(options);
       return;
     }
     if (RILQUIRKS_HAVE_QUERY_ICC_LOCK_RETRY_COUNT) {
       /* Only the emulator supports this request, ... */
       options.selCode = selCode[options.lockType];
       this.queryICCLockRetryCount(options);
     } else {
       /* ... while the phones do not. */
       options.errorMsg = GECKO_ERROR_REQUEST_NOT_SUPPORTED;
       options.success = false;
       this.sendChromeMessage(options);
     }
   },
   /**
    * Query ICC lock retry count.
    *
    * @param selCode
    *        One of ICC_SEL_CODE_*.
    * @param serviceClass
    *        One of ICC_SERVICE_CLASS_*.
    */
   queryICCLockRetryCount: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_GET_UNLOCK_RETRY_COUNT, options);
     Buf.writeInt32(1);
     Buf.writeString(options.selCode);
     Buf.sendParcel();
   },
   /**
    * Query ICC facility lock.
    *
    * @param facility
    *        One of ICC_CB_FACILITY_*.
    * @param password
    *        Password for the facility, or "" if not required.
    * @param serviceClass
    *        One of ICC_SERVICE_CLASS_*.
    * @param [optional] aid
    *        AID value.
    */
   queryICCFacilityLock: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_QUERY_FACILITY_LOCK, options);
     Buf.writeInt32(this.v5Legacy ? 3 : 4);
     Buf.writeString(options.facility);
     Buf.writeString(options.password);
     Buf.writeString(options.serviceClass.toString());
     if (!this.v5Legacy) {
       Buf.writeString(options.aid || this.aid);
     }
     Buf.sendParcel();
   },
   /**
    * Set ICC facility lock.
    *
    * @param facility
    *        One of ICC_CB_FACILITY_*.
    * @param enabled
    *        true to enable, false to disable.
    * @param password
    *        Password for the facility, or "" if not required.
    * @param serviceClass
    *        One of ICC_SERVICE_CLASS_*.
    * @param [optional] aid
    *        AID value.
    */
   setICCFacilityLock: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_SET_FACILITY_LOCK, options);
     Buf.writeInt32(this.v5Legacy ? 4 : 5);
     Buf.writeString(options.facility);
     Buf.writeString(options.enabled ? "1" : "0");
     Buf.writeString(options.password);
     Buf.writeString(options.serviceClass.toString());
     if (!this.v5Legacy) {
       Buf.writeString(options.aid || this.aid);
     }
     Buf.sendParcel();
   },
   /**
    *  Request an ICC I/O operation.
    *
    *  See TS 27.007 "restricted SIM" operation, "AT Command +CRSM".
    *  The sequence is in the same order as how libril reads this parcel,
    *  see the struct RIL_SIM_IO_v5 or RIL_SIM_IO_v6 defined in ril.h
    *
    *  @param command
    *         The I/O command, one of the ICC_COMMAND_* constants.
    *  @param fileId
    *         The file to operate on, one of the ICC_EF_* constants.
    *  @param pathId
    *         String type, check the 'pathid' parameter from TS 27.007 +CRSM.
    *  @param p1, p2, p3
    *         Arbitrary integer parameters for the command.
    *  @param [optional] dataWriter
    *         The function for writing string parameter for the ICC_COMMAND_UPDATE_RECORD.
    *  @param [optional] pin2
    *         String containing the PIN2.
    *  @param [optional] aid
    *         AID value.
    */
   iccIO: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_SIM_IO, options);
     Buf.writeInt32(options.command);
     Buf.writeInt32(options.fileId);
     Buf.writeString(options.pathId);
     Buf.writeInt32(options.p1);
     Buf.writeInt32(options.p2);
     Buf.writeInt32(options.p3);
     // Write data.
     if (options.command == ICC_COMMAND_UPDATE_RECORD &&
         options.dataWriter) {
       options.dataWriter(options.p3);
     } else {
       Buf.writeString(null);
     }
     // Write pin2.
     if (options.command == ICC_COMMAND_UPDATE_RECORD &&
         options.pin2) {
       Buf.writeString(options.pin2);
     } else {
       Buf.writeString(null);
     }
     if (!this.v5Legacy) {
       Buf.writeString(options.aid || this.aid);
     }
     Buf.sendParcel();
   },
   /**
    * Get IMSI.
    *
    * @param [optional] aid
    *        AID value.
    */
   getIMSI: function(aid) {
     let Buf = this.context.Buf;
     if (this.v5Legacy) {
       Buf.simpleRequest(REQUEST_GET_IMSI);
       return;
     }
     Buf.newParcel(REQUEST_GET_IMSI);
     Buf.writeInt32(1);
     Buf.writeString(aid || this.aid);
     Buf.sendParcel();
   },
   /**
    * Read UICC Phonebook contacts.
    *
    * @param contactType
    *        "adn" or "fdn".
    * @param requestId
    *        Request id from RadioInterfaceLayer.
    */
   readICCContacts: function(options) {
     if (!this.appType) {
       options.errorMsg = CONTACT_ERR_REQUEST_NOT_SUPPORTED;
       this.sendChromeMessage(options);
       return;
     }
     this.context.ICCContactHelper.readICCContacts(
       this.appType,
       options.contactType,
       function onsuccess(contacts) {
         for (let i = 0; i < contacts.length; i++) {
           let contact = contacts[i];
           let pbrIndex = contact.pbrIndex || 0;
           let recordIndex = pbrIndex * ICC_MAX_LINEAR_FIXED_RECORDS + contact.recordId;
           contact.contactId = this.iccInfo.iccid + recordIndex;
         }
         // Reuse 'options' to get 'requestId' and 'contactType'.
         options.contacts = contacts;
         this.sendChromeMessage(options);
       }.bind(this),
       function onerror(errorMsg) {
         options.errorMsg = errorMsg;
         this.sendChromeMessage(options);
       }.bind(this));
   },
   /**
    * Update UICC Phonebook.
    *
    * @param contactType   "adn" or "fdn".
    * @param contact       The contact will be updated.
    * @param pin2          PIN2 is required for updating FDN.
    * @param requestId     Request id from RadioInterfaceLayer.
    */
   updateICCContact: function(options) {
     let onsuccess = function onsuccess() {
       let recordIndex =
         contact.pbrIndex * ICC_MAX_LINEAR_FIXED_RECORDS + contact.recordId;
       contact.contactId = this.iccInfo.iccid + recordIndex;
       // Reuse 'options' to get 'requestId' and 'contactType'.
       this.sendChromeMessage(options);
     }.bind(this);
     let onerror = function onerror(errorMsg) {
       options.errorMsg = errorMsg;
       this.sendChromeMessage(options);
     }.bind(this);
     if (!this.appType || !options.contact) {
       onerror(CONTACT_ERR_REQUEST_NOT_SUPPORTED );
       return;
     }
     let contact = options.contact;
     let iccid = this.iccInfo.iccid;
     let isValidRecordId = false;
     if (typeof contact.contactId === "string" &&
         contact.contactId.startsWith(iccid)) {
       let recordIndex = contact.contactId.substring(iccid.length);
       contact.pbrIndex = Math.floor(recordIndex / ICC_MAX_LINEAR_FIXED_RECORDS);
       contact.recordId = recordIndex % ICC_MAX_LINEAR_FIXED_RECORDS;
       isValidRecordId = contact.recordId > 0 && contact.recordId < 0xff;
     }
     if (DEBUG) {
       this.context.debug("Update ICC Contact " + JSON.stringify(contact));
     }
     let ICCContactHelper = this.context.ICCContactHelper;
     // If contact has 'recordId' property, updates corresponding record.
     // If not, inserts the contact into a free record.
     if (isValidRecordId) {
       ICCContactHelper.updateICCContact(
         this.appType, options.contactType, contact, options.pin2, onsuccess, onerror);
     } else {
       ICCContactHelper.addICCContact(
         this.appType, options.contactType, contact, options.pin2, onsuccess, onerror);
     }
   },
   /**
    * Request the phone's radio to be enabled or disabled.
    *
    * @param enabled
    *        Boolean indicating the desired state.
    */
   setRadioEnabled: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_RADIO_POWER, options);
     Buf.writeInt32(1);
     Buf.writeInt32(options.enabled ? 1 : 0);
     Buf.sendParcel();
   },
   /**
    * Query call waiting status via MMI.
    */
   _handleQueryMMICallWaiting: function(options) {
     let Buf = this.context.Buf;
     function callback(options) {
       options.length = Buf.readInt32();
       options.enabled = (Buf.readInt32() === 1);
       let services = Buf.readInt32();
       if (options.enabled) {
         options.statusMessage = MMI_SM_KS_SERVICE_ENABLED_FOR;
         let serviceClass = [];
         for (let serviceClassMask = 1;
              serviceClassMask <= ICC_SERVICE_CLASS_MAX;
              serviceClassMask <<= 1) {
           if ((serviceClassMask & services) !== 0) {
             serviceClass.push(MMI_KS_SERVICE_CLASS_MAPPING[serviceClassMask]);
           }
         }
         options.additionalInformation = serviceClass;
       } else {
         options.statusMessage = MMI_SM_KS_SERVICE_DISABLED;
       }
       // Prevent DataCloneError when sending chrome messages.
       delete options.callback;
       this.sendChromeMessage(options);
     }
     options.callback = callback;
     this.queryCallWaiting(options);
   },
   /**
    * Set call waiting status via MMI.
    */
   _handleSetMMICallWaiting: function(options) {
     function callback(options) {
       if (options.enabled) {
         options.statusMessage = MMI_SM_KS_SERVICE_ENABLED;
       } else {
         options.statusMessage = MMI_SM_KS_SERVICE_DISABLED;
       }
       // Prevent DataCloneError when sending chrome messages.
       delete options.callback;
       this.sendChromeMessage(options);
     }
     options.callback = callback;
     this.setCallWaiting(options);
   },
   /**
    * Query call waiting status.
    *
    */
   queryCallWaiting: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_QUERY_CALL_WAITING, options);
     Buf.writeInt32(1);
     // As per 3GPP TS 24.083, section 1.6 UE doesn't need to send service
     // class parameter in call waiting interrogation  to network
     Buf.writeInt32(ICC_SERVICE_CLASS_NONE);
     Buf.sendParcel();
   },
   /**
    * Set call waiting status.
    *
    * @param on
    *        Boolean indicating the desired waiting status.
    */
   setCallWaiting: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_SET_CALL_WAITING, options);
     Buf.writeInt32(2);
     Buf.writeInt32(options.enabled ? 1 : 0);
     Buf.writeInt32(options.serviceClass !== undefined ?
                     options.serviceClass : ICC_SERVICE_CLASS_VOICE);
     Buf.sendParcel();
   },
   /**
    * Queries current CLIP status.
    *
    * (MMI request for code "*#30#")
    *
    */
   queryCLIP: function(options) {
     this.context.Buf.simpleRequest(REQUEST_QUERY_CLIP, options);
   },
   /**
    * Queries current CLIR status.
    *
    */
   getCLIR: function(options) {
     this.context.Buf.simpleRequest(REQUEST_GET_CLIR, options);
   },
   /**
    * Enables or disables the presentation of the calling line identity (CLI) to
    * the called party when originating a call.
    *
    * @param options.clirMode
    *        Is one of the CLIR_* constants in
    *        nsIDOMMozMobileConnection interface.
    */
   setCLIR: function(options) {
     if (options) {
       this.clirMode = options.clirMode;
     }
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_SET_CLIR, options);
     Buf.writeInt32(1);
     Buf.writeInt32(this.clirMode);
     Buf.sendParcel();
   },
   /**
    * Set screen state.
    *
    * @param on
    *        Boolean indicating whether the screen should be on or off.
    */
   setScreenState: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_SCREEN_STATE);
     Buf.writeInt32(1);
     Buf.writeInt32(options.on ? 1 : 0);
     Buf.sendParcel();
   },
   getVoiceRegistrationState: function() {
     this.context.Buf.simpleRequest(REQUEST_VOICE_REGISTRATION_STATE);
   },
   getVoiceRadioTechnology: function() {
     this.context.Buf.simpleRequest(REQUEST_VOICE_RADIO_TECH);
   },
   getDataRegistrationState: function() {
     this.context.Buf.simpleRequest(REQUEST_DATA_REGISTRATION_STATE);
   },
   getOperator: function() {
     this.context.Buf.simpleRequest(REQUEST_OPERATOR);
   },
   /**
    * Set the preferred network type.
    *
    * @param options An object contains a valid index of
    *                RIL_PREFERRED_NETWORK_TYPE_TO_GECKO as its `networkType`
    *                attribute, or undefined to set current preferred network
    *                type.
    */
   setPreferredNetworkType: function(options) {
     if (options) {
       this.preferredNetworkType = options.networkType;
     }
     if (this.preferredNetworkType == null) {
       return;
     }
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_SET_PREFERRED_NETWORK_TYPE, options);
     Buf.writeInt32(1);
     Buf.writeInt32(this.preferredNetworkType);
     Buf.sendParcel();
   },
   /**
    * Get the preferred network type.
    */
   getPreferredNetworkType: function(options) {
     this.context.Buf.simpleRequest(REQUEST_GET_PREFERRED_NETWORK_TYPE, options);
   },
   /**
    * Request various states about the network.
    */
   requestNetworkInfo: function() {
     if (this._processingNetworkInfo) {
       if (DEBUG) {
         this.context.debug("Network info requested, but we're already " +
                            "requesting network info.");
       }
       this._needRepollNetworkInfo = true;
       return;
     }
     if (DEBUG) this.context.debug("Requesting network info");
     this._processingNetworkInfo = true;
     this.getVoiceRegistrationState();
     this.getDataRegistrationState(); //TODO only GSM
     this.getOperator();
     this.getNetworkSelectionMode();
     this.getSignalStrength();
   },
   /**
    * Get the available networks
    */
   getAvailableNetworks: function(options) {
     if (DEBUG) this.context.debug("Getting available networks");
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_QUERY_AVAILABLE_NETWORKS, options);
     Buf.sendParcel();
   },
   /**
    * Request the radio's network selection mode
    */
   getNetworkSelectionMode: function() {
     if (DEBUG) this.context.debug("Getting network selection mode");
     this.context.Buf.simpleRequest(REQUEST_QUERY_NETWORK_SELECTION_MODE);
   },
   /**
    * Tell the radio to automatically choose a voice/data network
    */
   selectNetworkAuto: function(options) {
     if (DEBUG) this.context.debug("Setting automatic network selection");
     this.context.Buf.simpleRequest(REQUEST_SET_NETWORK_SELECTION_AUTOMATIC, options);
   },
   /**
    * Set the roaming preference mode
    */
   setRoamingPreference: function(options) {
     let roamingMode = CDMA_ROAMING_PREFERENCE_TO_GECKO.indexOf(options.mode);
     if (roamingMode === -1) {
       options.errorMsg = GECKO_ERROR_INVALID_PARAMETER;
       this.sendChromeMessage(options);
       return;
     }
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_CDMA_SET_ROAMING_PREFERENCE, options);
     Buf.writeInt32(1);
     Buf.writeInt32(roamingMode);
     Buf.sendParcel();
   },
   /**
    * Get the roaming preference mode
    */
   queryRoamingPreference: function(options) {
     this.context.Buf.simpleRequest(REQUEST_CDMA_QUERY_ROAMING_PREFERENCE, options);
   },
   /**
    * Set the voice privacy mode
    */
   setVoicePrivacyMode: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_CDMA_SET_PREFERRED_VOICE_PRIVACY_MODE, options);
     Buf.writeInt32(1);
     Buf.writeInt32(options.enabled ? 1 : 0);
     Buf.sendParcel();
   },
   /**
    * Get the voice privacy mode
    */
   queryVoicePrivacyMode: function(options) {
     this.context.Buf.simpleRequest(REQUEST_CDMA_QUERY_PREFERRED_VOICE_PRIVACY_MODE, options);
   },
   /**
    * Open Logical UICC channel (aid) for Secure Element access
    */
   iccOpenChannel: function(options) {
     if (DEBUG) {
       this.context.debug("iccOpenChannel: " + JSON.stringify(options));
     }
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_SIM_OPEN_CHANNEL, options);
     Buf.writeString(options.aid);
     Buf.sendParcel();
   },
 /**
    * Exchange APDU data on an open Logical UICC channel
    */
   iccExchangeAPDU: function(options) {
     if (DEBUG) this.context.debug("iccExchangeAPDU: " + JSON.stringify(options));
     let cla = options.apdu.cla;
     let command = options.apdu.command;
     let channel = options.channel;
     let path = options.apdu.path || "";
     let data = options.apdu.data || "";
     let data2 = options.apdu.data2 || "";
     let p1 = options.apdu.p1;
     let p2 = options.apdu.p2;
     let p3 = options.apdu.p3; // Extra
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_SIM_ACCESS_CHANNEL, options);
     Buf.writeInt32(cla);
     Buf.writeInt32(command);
     Buf.writeInt32(channel);
     Buf.writeString(path); // path
     Buf.writeInt32(p1);
     Buf.writeInt32(p2);
     Buf.writeInt32(p3);
     Buf.writeString(data); // generic data field.
     Buf.writeString(data2);
     Buf.sendParcel();
   },
   /**
    * Close Logical UICC channel
    */
   iccCloseChannel: function(options) {
     if (DEBUG) this.context.debug("iccCloseChannel: " + JSON.stringify(options));
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_SIM_CLOSE_CHANNEL, options);
     Buf.writeInt32(1);
     Buf.writeInt32(options.channel);
     Buf.sendParcel();
   },
   /**
    * Tell the radio to choose a specific voice/data network
    */
   selectNetwork: function(options) {
     if (DEBUG) {
       this.context.debug("Setting manual network selection: " +
                          options.mcc + ", " + options.mnc);
     }
     let numeric = (options.mcc && options.mnc) ? options.mcc + options.mnc : null;
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_SET_NETWORK_SELECTION_MANUAL, options);
     Buf.writeString(numeric);
     Buf.sendParcel();
   },
   /**
    * Get current calls.
    */
   getCurrentCalls: function() {
     this.context.Buf.simpleRequest(REQUEST_GET_CURRENT_CALLS);
   },
   /**
    * Get the signal strength.
    */
   getSignalStrength: function() {
     this.context.Buf.simpleRequest(REQUEST_SIGNAL_STRENGTH);
   },
   getIMEI: function(options) {
     this.context.Buf.simpleRequest(REQUEST_GET_IMEI, options);
   },
   getIMEISV: function() {
     this.context.Buf.simpleRequest(REQUEST_GET_IMEISV);
   },
   getDeviceIdentity: function() {
     this.context.Buf.simpleRequest(REQUEST_DEVICE_IDENTITY);
   },
   getBasebandVersion: function() {
     this.context.Buf.simpleRequest(REQUEST_BASEBAND_VERSION);
   },
   sendExitEmergencyCbModeRequest: function(options) {
     this.context.Buf.simpleRequest(REQUEST_EXIT_EMERGENCY_CALLBACK_MODE, options);
   },
   getCdmaSubscription: function() {
     this.context.Buf.simpleRequest(REQUEST_CDMA_SUBSCRIPTION);
   },
   exitEmergencyCbMode: function(options) {
     // The function could be called by an API from RadioInterfaceLayer or by
     // ril_worker itself. From ril_worker, we won't pass the parameter
     // 'options'. In this case, it is marked as internal.
     if (!options) {
       options = {internal: true};
     }
     this._cancelEmergencyCbModeTimeout();
     this.sendExitEmergencyCbModeRequest(options);
   },
   /**
    * Cache the request for making an emergency call when radio is off. The
    * request shall include two types of callback functions. 'callback' is
    * called when radio is ready, and 'onerror' is called when turning radio
    * on fails.
    */
   cachedDialRequest : null,
   /**
    * Dial the phone.
    *
    * @param number
    *        String containing the number to dial.
    * @param clirMode
    *        Integer for showing/hidding the caller Id to the called party.
    * @param uusInfo
    *        Integer doing something XXX TODO
    */
   dial: function(options) {
     let onerror = (function onerror(options, errorMsg) {
       options.success = false;
       options.errorMsg = errorMsg;
       this.sendChromeMessage(options);
     }).bind(this, options);
     if (this._isEmergencyNumber(options.number)) {
       this.dialEmergencyNumber(options, onerror);
     } else {
       if (!this._isCdma) {
         // TODO: Both dial() and sendMMI() functions should be unified at some
         // point in the future. In the mean time we handle temporary CLIR MMI
         // commands through the dial() function. Please see bug 889737.
         let mmi = this._parseMMI(options.number);
         if (mmi && this._isTemporaryModeCLIR(mmi)) {
           options.number = mmi.dialNumber;
           // In temporary mode, MMI_PROCEDURE_ACTIVATION means allowing CLI
           // presentation, i.e. CLIR_SUPPRESSION. See TS 22.030, Annex B.
           options.clirMode = mmi.procedure == MMI_PROCEDURE_ACTIVATION ?
                              CLIR_SUPPRESSION : CLIR_INVOCATION;
         }
       }
       this.dialNonEmergencyNumber(options, onerror);
     }
   },
   dialNonEmergencyNumber: function(options, onerror) {
     if (this.radioState == GECKO_RADIOSTATE_OFF) {
       // Notify error in establishing the call without radio.
       onerror(GECKO_ERROR_RADIO_NOT_AVAILABLE);
       return;
     }
     if (this.voiceRegistrationState.emergencyCallsOnly ||
         options.isDialEmergency) {
       onerror(RIL_CALL_FAILCAUSE_TO_GECKO_CALL_ERROR[CALL_FAIL_UNOBTAINABLE_NUMBER]);
       return;
     }
     // Exit emergency callback mode when user dial a non-emergency call.
     if (this._isInEmergencyCbMode) {
       this.exitEmergencyCbMode();
     }
     if (this._isCdma && Object.keys(this.currentCalls).length == 1) {
       // Make a Cdma 3way call.
       options.featureStr = options.number;
       this.sendCdmaFlashCommand(options);
     } else {
       options.request = REQUEST_DIAL;
       this.sendDialRequest(options);
     }
   },
   dialEmergencyNumber: function(options, onerror) {
     options.request = RILQUIRKS_REQUEST_USE_DIAL_EMERGENCY_CALL ?
                       REQUEST_DIAL_EMERGENCY_CALL : REQUEST_DIAL;
     if (this.radioState == GECKO_RADIOSTATE_OFF) {
       if (DEBUG) {
         this.context.debug("Automatically enable radio for an emergency call.");
       }
       if (!this.cachedDialRequest) {
         this.cachedDialRequest = {};
       }
       this.cachedDialRequest.onerror = onerror;
       this.cachedDialRequest.callback = this.sendDialRequest.bind(this, options);
       this.setRadioEnabled({enabled: true});
       return;
     }
     if (this._isCdma && Object.keys(this.currentCalls).length == 1) {
       // Make a Cdma 3way call.
       options.featureStr = options.number;
       this.sendCdmaFlashCommand(options);
     } else {
       this.sendDialRequest(options);
     }
   },
   sendDialRequest: function(options) {
     // Always succeed.
     options.success = true;
     this.sendChromeMessage(options);
     this._createPendingOutgoingCall(options);
     let Buf = this.context.Buf;
     Buf.newParcel(options.request, options);
     Buf.writeString(options.number);
     Buf.writeInt32(options.clirMode || 0);
     Buf.writeInt32(options.uusInfo || 0);
     // TODO Why do we need this extra 0? It was put it in to make this
     // match the format of the binary message.
     Buf.writeInt32(0);
     Buf.sendParcel();
   },
   sendCdmaFlashCommand: function(options) {
     let Buf = this.context.Buf;
     options.isCdma = true;
     options.request = REQUEST_CDMA_FLASH;
     Buf.newParcel(options.request, options);
     Buf.writeString(options.featureStr);
     Buf.sendParcel();
   },
   /**
    * Hang up all calls
    */
   hangUpAll: function() {
     for (let callIndex in this.currentCalls) {
       this.hangUp({callIndex: callIndex});
     }
   },
   /**
    * Hang up the phone.
    *
    * @param callIndex
    *        Call index (1-based) as reported by REQUEST_GET_CURRENT_CALLS.
    */
   hangUp: function(options) {
     let call = this.currentCalls[options.callIndex];
     if (!call) {
       return;
     }
     let callIndex = call.callIndex;
     if (callIndex === OUTGOING_PLACEHOLDER_CALL_INDEX) {
       if (DEBUG) this.context.debug("Hang up pending outgoing call.");
       this._removeVoiceCall(call, GECKO_CALL_ERROR_NORMAL_CALL_CLEARING);
       return;
     }
     call.hangUpLocal = true;
     if (call.state === CALL_STATE_HOLDING) {
       this.sendHangUpBackgroundRequest(callIndex);
     } else {
       this.sendHangUpRequest(callIndex);
     }
   },
   sendHangUpRequest: function(callIndex) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_HANGUP);
     Buf.writeInt32(1);
     Buf.writeInt32(callIndex);
     Buf.sendParcel();
   },
   sendHangUpBackgroundRequest: function(callIndex) {
     let Buf = this.context.Buf;
     Buf.simpleRequest(REQUEST_HANGUP_WAITING_OR_BACKGROUND);
   },
   /**
    * Mute or unmute the radio.
    *
    * @param mute
    *        Boolean to indicate whether to mute or unmute the radio.
    */
   setMute: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_SET_MUTE);
     Buf.writeInt32(1);
     Buf.writeInt32(options.muted ? 1 : 0);
     Buf.sendParcel();
   },
   /**
    * Answer an incoming/waiting call.
    *
    * @param callIndex
    *        Call index of the call to answer.
    */
   answerCall: function(options) {
     // Check for races. Since we dispatched the incoming/waiting call
     // notification the incoming/waiting call may have changed. The main
     // thread thinks that it is answering the call with the given index,
     // so only answer if that is still incoming/waiting.
     let call = this.currentCalls[options.callIndex];
     if (!call) {
       return;
     }
     let Buf = this.context.Buf;
     switch (call.state) {
       case CALL_STATE_INCOMING:
         Buf.simpleRequest(REQUEST_ANSWER);
         break;
       case CALL_STATE_WAITING:
         // Answer the waiting (second) call, and hold the first call.
         Buf.simpleRequest(REQUEST_SWITCH_WAITING_OR_HOLDING_AND_ACTIVE);
         break;
     }
   },
   /**
    * Reject an incoming/waiting call.
    *
    * @param callIndex
    *        Call index of the call to reject.
    */
   rejectCall: function(options) {
     // Check for races. Since we dispatched the incoming/waiting call
     // notification the incoming/waiting call may have changed. The main
     // thread thinks that it is rejecting the call with the given index,
     // so only reject if that is still incoming/waiting.
     let call = this.currentCalls[options.callIndex];
     if (!call) {
       return;
     }
     call.hangUpLocal = true;
     let Buf = this.context.Buf;
     if (this._isCdma) {
       // AT+CHLD=0 means "release held or UDUB."
       Buf.simpleRequest(REQUEST_HANGUP_WAITING_OR_BACKGROUND);
       return;
     }
     switch (call.state) {
       case CALL_STATE_INCOMING:
         Buf.simpleRequest(REQUEST_UDUB);
         break;
       case CALL_STATE_WAITING:
         // Reject the waiting (second) call, and remain the first call.
         Buf.simpleRequest(REQUEST_HANGUP_WAITING_OR_BACKGROUND);
         break;
     }
   },
   holdCall: function(options) {
     let call = this.currentCalls[options.callIndex];
     if (!call) {
       options.errorMsg = GECKO_ERROR_GENERIC_FAILURE;
       options.success = false;
       this.sendChromeMessage(options);
       return;
     }
     let Buf = this.context.Buf;
     if (this._isCdma) {
       options.featureStr = "";
       this.sendCdmaFlashCommand(options);
     } else if (call.state == CALL_STATE_ACTIVE) {
       Buf.simpleRequest(REQUEST_SWITCH_WAITING_OR_HOLDING_AND_ACTIVE, options);
     }
  },
   resumeCall: function(options) {
     let call = this.currentCalls[options.callIndex];
     if (!call) {
       options.errorMsg = GECKO_ERROR_GENERIC_FAILURE;
       options.success = false;
       this.sendChromeMessage(options);
       return;
     }
     let Buf = this.context.Buf;
     if (this._isCdma) {
       options.featureStr = "";
       this.sendCdmaFlashCommand(options);
     } else if (call.state == CALL_STATE_HOLDING) {
       Buf.simpleRequest(REQUEST_SWITCH_WAITING_OR_HOLDING_AND_ACTIVE, options);
     }
   },
   // Flag indicating whether user has requested making a conference call.
   _hasConferenceRequest: false,
   conferenceCall: function(options) {
     let Buf = this.context.Buf;
     if (this._isCdma) {
       options.featureStr = "";
       this.sendCdmaFlashCommand(options);
     } else {
       this._hasConferenceRequest = true;
       Buf.simpleRequest(REQUEST_CONFERENCE, options);
     }
   },
   separateCall: function(options) {
     let call = this.currentCalls[options.callIndex];
     if (!call) {
       options.errorName = "removeError";
       options.errorMsg = GECKO_ERROR_GENERIC_FAILURE;
       options.success = false;
       this.sendChromeMessage(options);
       return;
     }
     let Buf = this.context.Buf;
     if (this._isCdma) {
       options.featureStr = "";
       this.sendCdmaFlashCommand(options);
     } else {
       Buf.newParcel(REQUEST_SEPARATE_CONNECTION, options);
       Buf.writeInt32(1);
       Buf.writeInt32(options.callIndex);
       Buf.sendParcel();
     }
  },
   holdConference: function() {
     if (this._isCdma) {
       return;
     }
     this.context.Buf.simpleRequest(REQUEST_SWITCH_WAITING_OR_HOLDING_AND_ACTIVE);
   },
   resumeConference: function() {
     if (this._isCdma) {
       return;
     }
     this.context.Buf.simpleRequest(REQUEST_SWITCH_WAITING_OR_HOLDING_AND_ACTIVE);
   },
   /**
    * Send an SMS.
    *
    * The `options` parameter object should contain the following attributes:
    *
    * @param number
    *        String containing the recipient number.
    * @param body
    *        String containing the message text.
    * @param envelopeId
    *        Numeric value identifying the sms request.
    */
   sendSMS: function(options) {
     options.langIndex = options.langIndex || PDU_NL_IDENTIFIER_DEFAULT;
     options.langShiftIndex = options.langShiftIndex || PDU_NL_IDENTIFIER_DEFAULT;
     if (!options.retryCount) {
       options.retryCount = 0;
     }
     if (!options.segmentSeq) {
       // Fist segment to send
       options.segmentSeq = 1;
       options.body = options.segments[0].body;
       options.encodedBodyLength = options.segments[0].encodedBodyLength;
     }
     let Buf = this.context.Buf;
     if (this._isCdma) {
       Buf.newParcel(REQUEST_CDMA_SEND_SMS, options);
       this.context.CdmaPDUHelper.writeMessage(options);
     } else {
       Buf.newParcel(REQUEST_SEND_SMS, options);
       Buf.writeInt32(2);
       Buf.writeString(options.SMSC);
       this.context.GsmPDUHelper.writeMessage(options);
     }
     Buf.sendParcel();
   },
   /**
    * Acknowledge the receipt and handling of an SMS.
    *
    * @param success
    *        Boolean indicating whether the message was successfuly handled.
    * @param cause
    *        SMS_* constant indicating the reason for unsuccessful handling.
    */
   acknowledgeGsmSms: function(success, cause) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_SMS_ACKNOWLEDGE);
     Buf.writeInt32(2);
     Buf.writeInt32(success ? 1 : 0);
     Buf.writeInt32(cause);
     Buf.sendParcel();
   },
   /**
    * Acknowledge the receipt and handling of an SMS.
    *
    * @param success
    *        Boolean indicating whether the message was successfuly handled.
    */
   ackSMS: function(options) {
     if (options.result == PDU_FCS_RESERVED) {
       return;
     }
     if (this._isCdma) {
       this.acknowledgeCdmaSms(options.result == PDU_FCS_OK, options.result);
     } else {
       this.acknowledgeGsmSms(options.result == PDU_FCS_OK, options.result);
     }
   },
   /**
    * Acknowledge the receipt and handling of a CDMA SMS.
    *
    * @param success
    *        Boolean indicating whether the message was successfuly handled.
    * @param cause
    *        SMS_* constant indicating the reason for unsuccessful handling.
    */
   acknowledgeCdmaSms: function(success, cause) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_CDMA_SMS_ACKNOWLEDGE);
     Buf.writeInt32(success ? 0 : 1);
     Buf.writeInt32(cause);
     Buf.sendParcel();
   },
   /**
    * Update received MWI into EF_MWIS.
    */
   updateMwis: function(options) {
     if (this.context.ICCUtilsHelper.isICCServiceAvailable("MWIS")) {
       this.context.SimRecordHelper.updateMWIS(options.mwi);
     }
   },
   setCellBroadcastDisabled: function(options) {
     this.cellBroadcastDisabled = options.disabled;
     // If |this.mergedCellBroadcastConfig| is null, either we haven't finished
     // reading required SIM files, or no any channel is ever configured.  In
     // the former case, we'll call |this.updateCellBroadcastConfig()| later
     // with correct configs; in the latter case, we don't bother resetting CB
     // to disabled again.
     if (this.mergedCellBroadcastConfig) {
       this.updateCellBroadcastConfig();
     }
   },
   setCellBroadcastSearchList: function(options) {
     let getSearchListStr = function(aSearchList) {
       if (typeof aSearchList === "string" || aSearchList instanceof String) {
         return aSearchList;
       }
       // TODO: Set search list for CDMA/GSM individually. Bug 990926
       let prop = this._isCdma ? "cdma" : "gsm";
       return aSearchList && aSearchList[prop];
     }.bind(this);
     try {
       let str = getSearchListStr(options.searchList);
       this.cellBroadcastConfigs.MMI = this._convertCellBroadcastSearchList(str);
       options.success = true;
     } catch (e) {
       if (DEBUG) {
         this.context.debug("Invalid Cell Broadcast search list: " + e);
       }
       options.success = false;
     }
     this.sendChromeMessage(options);
     if (!options.success) {
       return;
     }
     this._mergeAllCellBroadcastConfigs();
   },
   updateCellBroadcastConfig: function() {
     let activate = !this.cellBroadcastDisabled &&
                    (this.mergedCellBroadcastConfig != null) &&
                    (this.mergedCellBroadcastConfig.length > 0);
     if (activate) {
       this.setSmsBroadcastConfig(this.mergedCellBroadcastConfig);
     } else {
       // It's unnecessary to set config first if we're deactivating.
       this.setSmsBroadcastActivation(false);
     }
   },
   setGsmSmsBroadcastConfig: function(config) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_GSM_SET_BROADCAST_SMS_CONFIG);
     let numConfigs = config ? config.length / 2 : 0;
     Buf.writeInt32(numConfigs);
     for (let i = 0; i < config.length;) {
       Buf.writeInt32(config[i++]);
       Buf.writeInt32(config[i++]);
       Buf.writeInt32(0x00);
       Buf.writeInt32(0xFF);
       Buf.writeInt32(1);
     }
     Buf.sendParcel();
   },
   /**
    * Send CDMA SMS broadcast config.
    *
    * @see 3GPP2 C.R1001 Sec. 9.2 and 9.3
    */
   setCdmaSmsBroadcastConfig: function(config) {
     let Buf = this.context.Buf;
     // |config| is an array of half-closed range: [[from, to), [from, to), ...].
     // It will be further decomposed, ex: [1, 4) => 1, 2, 3.
     Buf.newParcel(REQUEST_CDMA_SET_BROADCAST_SMS_CONFIG);
     let numConfigs = 0;
     for (let i = 0; i < config.length; i += 2) {
       numConfigs += (config[i+1] - config[i]);
     }
     Buf.writeInt32(numConfigs);
     for (let i = 0; i < config.length;) {
       let begin = config[i++];
       let end = config[i++];
       for (let j = begin; j < end; ++j) {
         Buf.writeInt32(j);
         Buf.writeInt32(0);  // Language Indicator: Unknown or unspecified.
         Buf.writeInt32(1);
       }
     }
     Buf.sendParcel();
   },
   setSmsBroadcastConfig: function(config) {
     if (this._isCdma) {
       this.setCdmaSmsBroadcastConfig(config);
     } else {
       this.setGsmSmsBroadcastConfig(config);
     }
   },
   setSmsBroadcastActivation: function(activate) {
     let parcelType = this._isCdma ? REQUEST_CDMA_SMS_BROADCAST_ACTIVATION :
                                     REQUEST_GSM_SMS_BROADCAST_ACTIVATION;
     let Buf = this.context.Buf;
     Buf.newParcel(parcelType);
     Buf.writeInt32(1);
     // See hardware/ril/include/telephony/ril.h, 0 - Activate, 1 - Turn off.
     Buf.writeInt32(activate ? 0 : 1);
     Buf.sendParcel();
   },
   /**
    * Start a DTMF Tone.
    *
    * @param dtmfChar
    *        DTMF signal to send, 0-9, *, +
    */
   startTone: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_DTMF_START);
     Buf.writeString(options.dtmfChar);
     Buf.sendParcel();
   },
   stopTone: function() {
     this.context.Buf.simpleRequest(REQUEST_DTMF_STOP);
   },
   /**
    * Send a DTMF tone.
    *
    * @param dtmfChar
    *        DTMF signal to send, 0-9, *, +
    */
   sendTone: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_DTMF);
     Buf.writeString(options.dtmfChar);
     Buf.sendParcel();
   },
   /**
    * Get the Short Message Service Center address.
    */
   getSmscAddress: function(options) {
     if (!this.SMSC) {
       this.context.Buf.simpleRequest(REQUEST_GET_SMSC_ADDRESS, options);
       return;
     }
     if (!options || options.rilMessageType !== "getSmscAddress") {
       return;
     }
     options.smscAddress = this.SMSC;
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     this.sendChromeMessage(options);
   },
   /**
    * Set the Short Message Service Center address.
    *
    * @param smscAddress
    *        Short Message Service Center address in PDU format.
    */
   setSmscAddress: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_SET_SMSC_ADDRESS, options);
     Buf.writeString(options.smscAddress);
     Buf.sendParcel();
   },
   /**
    * Setup a data call.
    *
    * @param radioTech
    *        Integer to indicate radio technology.
    *        DATACALL_RADIOTECHNOLOGY_CDMA => CDMA.
    *        DATACALL_RADIOTECHNOLOGY_GSM  => GSM.
    * @param apn
    *        String containing the name of the APN to connect to.
    * @param user
    *        String containing the username for the APN.
    * @param passwd
    *        String containing the password for the APN.
    * @param chappap
    *        Integer containing CHAP/PAP auth type.
    *        DATACALL_AUTH_NONE        => PAP and CHAP is never performed.
    *        DATACALL_AUTH_PAP         => PAP may be performed.
    *        DATACALL_AUTH_CHAP        => CHAP may be performed.
    *        DATACALL_AUTH_PAP_OR_CHAP => PAP / CHAP may be performed.
    * @param pdptype
    *        String containing PDP type to request. ("IP", "IPV6", ...)
    */
   setupDataCall: function(options) {
     // From ./hardware/ril/include/telephony/ril.h:
     // ((const char **)data)[0] Radio technology to use: 0-CDMA, 1-GSM/UMTS, 2...
     // for values above 2 this is RIL_RadioTechnology + 2.
     //
     // From frameworks/base/telephony/java/com/android/internal/telephony/DataConnection.java:
     // if the mRilVersion < 6, radio technology must be GSM/UMTS or CDMA.
     // Otherwise, it must be + 2
     //
     // See also bug 901232 and 867873
     let radioTech;
     if (this.v5Legacy) {
       radioTech = this._isCdma ? DATACALL_RADIOTECHNOLOGY_CDMA
                                : DATACALL_RADIOTECHNOLOGY_GSM;
     } else {
       radioTech = options.radioTech + 2;
     }
     let Buf = this.context.Buf;
     let token = Buf.newParcel(REQUEST_SETUP_DATA_CALL, options);
     Buf.writeInt32(7);
     Buf.writeString(radioTech.toString());
     Buf.writeString(DATACALL_PROFILE_DEFAULT.toString());
     Buf.writeString(options.apn);
     Buf.writeString(options.user);
     Buf.writeString(options.passwd);
     Buf.writeString(options.chappap.toString());
     Buf.writeString(options.pdptype);
     Buf.sendParcel();
     return token;
   },
   /**
    * Deactivate a data call.
    *
    * @param cid
    *        String containing CID.
    * @param reason
    *        One of DATACALL_DEACTIVATE_* constants.
    */
   deactivateDataCall: function(options) {
     let datacall = this.currentDataCalls[options.cid];
     if (!datacall) {
       return;
     }
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_DEACTIVATE_DATA_CALL, options);
     Buf.writeInt32(2);
     Buf.writeString(options.cid);
     Buf.writeString(options.reason || DATACALL_DEACTIVATE_NO_REASON);
     Buf.sendParcel();
     datacall.state = GECKO_NETWORK_STATE_DISCONNECTING;
     this.sendChromeMessage(datacall);
   },
   /**
    * Get a list of data calls.
    */
   getDataCallList: function() {
     this.context.Buf.simpleRequest(REQUEST_DATA_CALL_LIST);
   },
   _attachDataRegistration: false,
   /**
    * Manually attach/detach data registration.
    *
    * @param attach
    *        Boolean value indicating attach or detach.
    */
   setDataRegistration: function(options) {
     let request = options.attach ? RIL_REQUEST_GPRS_ATTACH :
                                    RIL_REQUEST_GPRS_DETACH;
     this._attachDataRegistration = options.attach;
     this.context.Buf.simpleRequest(request);
   },
   /**
    * Get failure casue code for the most recently failed PDP context.
    */
   getFailCauseCode: function(callback) {
     this.context.Buf.simpleRequest(REQUEST_LAST_CALL_FAIL_CAUSE,
                                    {callback: callback});
   },
   /**
    * Helper to parse MMI/USSD string. TS.22.030 Figure 3.5.3.2.
    */
   _parseMMI: function(mmiString) {
     if (!mmiString || !mmiString.length) {
       return null;
     }
     let matches = this._matchMMIRegexp(mmiString);
     if (matches) {
       // After successfully executing the regular expresion over the MMI string,
       // the following match groups should contain:
       // 1 = full MMI string that might be used as a USSD request.
       // 2 = MMI procedure.
       // 3 = Service code.
       // 5 = SIA.
       // 7 = SIB.
       // 9 = SIC.
       // 11 = Password registration.
       // 12 = Dialing number.
       return {
         fullMMI: matches[MMI_MATCH_GROUP_FULL_MMI],
         procedure: matches[MMI_MATCH_GROUP_MMI_PROCEDURE],
         serviceCode: matches[MMI_MATCH_GROUP_SERVICE_CODE],
         sia: matches[MMI_MATCH_GROUP_SIA],
         sib: matches[MMI_MATCH_GROUP_SIB],
         sic: matches[MMI_MATCH_GROUP_SIC],
         pwd: matches[MMI_MATCH_GROUP_PWD_CONFIRM],
         dialNumber: matches[MMI_MATCH_GROUP_DIALING_NUMBER]
       };
     }
     if (this._isPoundString(mmiString) ||
         this._isMMIShortString(mmiString)) {
       return {
         fullMMI: mmiString
       };
     }
     return null;
   },
   /**
    * Helper to parse MMI string via regular expression. TS.22.030 Figure
    * 3.5.3.2.
    */
   _matchMMIRegexp: function(mmiString) {
     // Regexp to parse and process the MMI code.
     if (this._mmiRegExp == null) {
       // The first group of the regexp takes the whole MMI string.
       // The second group takes the MMI procedure that can be:
       //    - Activation (*SC*SI#).
       //    - Deactivation (#SC*SI#).
       //    - Interrogation (*#SC*SI#).
       //    - Registration (**SC*SI#).
       //    - Erasure (##SC*SI#).
       //  where SC = Service Code (2 or 3 digits) and SI = Supplementary Info
       //  (variable length).
       let pattern = "((\\*[*#]?|##?)";
       // Third group of the regexp looks for the MMI Service code, which is a
       // 2 or 3 digits that uniquely specifies the Supplementary Service
       // associated with the MMI code.
       pattern += "(\\d{2,3})";
       // Groups from 4 to 9 looks for the MMI Supplementary Information SIA,
       // SIB and SIC. SIA may comprise e.g. a PIN code or Directory Number,
       // SIB may be used to specify the tele or bearer service and SIC to
       // specify the value of the "No Reply Condition Timer". Where a particular
       // service request does not require any SI, "*SI" is not entered. The use
       // of SIA, SIB and SIC is optional and shall be entered in any of the
       // following formats:
       //    - *SIA*SIB*SIC#
       //    - *SIA*SIB#
       //    - *SIA**SIC#
       //    - *SIA#
       //    - **SIB*SIC#
       //    - ***SISC#
       pattern += "(\\*([^*#]*)(\\*([^*#]*)(\\*([^*#]*)";
       // The eleventh group takes the password for the case of a password
       // registration procedure.
       pattern += "(\\*([^*#]*))?)?)?)?#)";
       // The last group takes the dial string after the #.
       pattern += "([^#]*)";
       this._mmiRegExp = new RegExp(pattern);
     }
     // Regex only applys for those well-defined MMI strings (refer to TS.22.030
     // Annex B), otherwise, null should be the expected return value.
     return this._mmiRegExp.exec(mmiString);
   },
   /**
    * Helper to parse # string. TS.22.030 Figure 3.5.3.2.
    */
   _isPoundString: function(mmiString) {
     return (mmiString.charAt(mmiString.length - 1) === MMI_END_OF_USSD);
   },
   /**
    * Helper to parse short string. TS.22.030 Figure 3.5.3.2.
    */
   _isMMIShortString: function(mmiString) {
     if (mmiString.length > 2) {
       return false;
     }
     if (this._isEmergencyNumber(mmiString)) {
       return false;
     }
     // In a call case.
     if (Object.getOwnPropertyNames(this.currentCalls).length > 0) {
       return true;
     }
     if ((mmiString.length != 2) || (mmiString.charAt(0) !== '1')) {
       return true;
     }
     return false;
   },
   sendMMI: function(options) {
     if (DEBUG) {
       this.context.debug("SendMMI " + JSON.stringify(options));
     }
     let mmiString = options.mmi;
     let mmi = this._parseMMI(mmiString);
     let _sendMMIError = (function(errorMsg, mmiServiceCode) {
       options.success = false;
       options.errorMsg = errorMsg;
       if (mmiServiceCode) {
         options.mmiServiceCode = mmiServiceCode;
       }
       this.sendChromeMessage(options);
     }).bind(this);
     function _isValidPINPUKRequest(mmiServiceCode) {
       // The only allowed MMI procedure for ICC PIN, PIN2, PUK and PUK2 handling
       // is "Registration" (**).
       if (!mmi.procedure || mmi.procedure != MMI_PROCEDURE_REGISTRATION ) {
         _sendMMIError(MMI_ERROR_KS_INVALID_ACTION, mmiServiceCode);
         return false;
       }
       if (!mmi.sia || !mmi.sia.length || !mmi.sib || !mmi.sib.length ||
           !mmi.sic || !mmi.sic.length) {
         _sendMMIError(MMI_ERROR_KS_ERROR, mmiServiceCode);
         return false;
       }
       if (mmi.sib != mmi.sic) {
         _sendMMIError(MMI_ERROR_KS_MISMATCH_PIN, mmiServiceCode);
         return false;
       }
       if (mmi.sia.length < 4 || mmi.sia.length > 8 ||
           mmi.sib.length < 4 || mmi.sib.length > 8 ||
           mmi.sic.length < 4 || mmi.sic.length > 8) {
         _sendMMIError(MMI_ERROR_KS_INVALID_PIN, mmiServiceCode);
         return false;
       }
       return true;
     }
     let _isRadioAvailable = (function(mmiServiceCode) {
       if (this.radioState !== GECKO_RADIOSTATE_READY) {
         _sendMMIError(GECKO_ERROR_RADIO_NOT_AVAILABLE, mmiServiceCode);
         return false;
       }
       return true;
     }).bind(this);
     // If we couldn't parse the MMI code, we'll send it as an USSD request.
     if (mmi === null) {
       if (this._ussdSession) {
         if (!_isRadioAvailable(MMI_KS_SC_USSD)) {
           return;
         }
         options.ussd = mmiString;
         this.sendUSSD(options);
         return;
       }
       _sendMMIError(MMI_ERROR_KS_ERROR);
       return;
     }
     if (DEBUG) {
       this.context.debug("MMI " + JSON.stringify(mmi));
     }
     // We check if the MMI service code is supported and in that case we
     // trigger the appropriate RIL request if possible.
     let sc = mmi.serviceCode;
     switch (sc) {
       // Call forwarding
       case MMI_SC_CFU:
       case MMI_SC_CF_BUSY:
       case MMI_SC_CF_NO_REPLY:
       case MMI_SC_CF_NOT_REACHABLE:
       case MMI_SC_CF_ALL:
       case MMI_SC_CF_ALL_CONDITIONAL:
         if (!_isRadioAvailable(MMI_KS_SC_CALL_FORWARDING)) {
           return;
         }
         // Call forwarding requires at least an action, given by the MMI
         // procedure, and a reason, given by the MMI service code, but there
         // is no way that we get this far without a valid procedure or service
         // code.
         options.mmiServiceCode = MMI_KS_SC_CALL_FORWARDING;
         options.action = MMI_PROC_TO_CF_ACTION[mmi.procedure];
         options.reason = MMI_SC_TO_CF_REASON[sc];
         options.number = mmi.sia;
         options.serviceClass = this._siToServiceClass(mmi.sib);
         if (options.action == CALL_FORWARD_ACTION_QUERY_STATUS) {
           this.queryCallForwardStatus(options);
           return;
         }
         options.isSetCallForward = true;
         options.timeSeconds = mmi.sic;
         this.setCallForward(options);
         return;
       // Change the current ICC PIN number.
       case MMI_SC_PIN:
         // As defined in TS.122.030 6.6.2 to change the ICC PIN we should expect
         // an MMI code of the form **04*OLD_PIN*NEW_PIN*NEW_PIN#, where old PIN
         // should be entered as the SIA parameter and the new PIN as SIB and
         // SIC.
         if (!_isRadioAvailable(MMI_KS_SC_PIN) ||
             !_isValidPINPUKRequest(MMI_KS_SC_PIN)) {
           return;
         }
         options.mmiServiceCode = MMI_KS_SC_PIN;
         options.pin = mmi.sia;
         options.newPin = mmi.sib;
         this.changeICCPIN(options);
         return;
       // Change the current ICC PIN2 number.
       case MMI_SC_PIN2:
         // As defined in TS.122.030 6.6.2 to change the ICC PIN2 we should
         // enter and MMI code of the form **042*OLD_PIN2*NEW_PIN2*NEW_PIN2#,
         // where the old PIN2 should be entered as the SIA parameter and the
         // new PIN2 as SIB and SIC.
         if (!_isRadioAvailable(MMI_KS_SC_PIN2) ||
             !_isValidPINPUKRequest(MMI_KS_SC_PIN2)) {
           return;
         }
         options.mmiServiceCode = MMI_KS_SC_PIN2;
         options.pin = mmi.sia;
         options.newPin = mmi.sib;
         this.changeICCPIN2(options);
         return;
       // Unblock ICC PIN.
       case MMI_SC_PUK:
         // As defined in TS.122.030 6.6.3 to unblock the ICC PIN we should
         // enter an MMI code of the form **05*PUK*NEW_PIN*NEW_PIN#, where PUK
         // should be entered as the SIA parameter and the new PIN as SIB and
         // SIC.
         if (!_isRadioAvailable(MMI_KS_SC_PUK) ||
             !_isValidPINPUKRequest(MMI_KS_SC_PUK)) {
           return;
         }
         options.mmiServiceCode = MMI_KS_SC_PUK;
         options.puk = mmi.sia;
         options.newPin = mmi.sib;
         this.enterICCPUK(options);
         return;
       // Unblock ICC PIN2.
       case MMI_SC_PUK2:
         // As defined in TS.122.030 6.6.3 to unblock the ICC PIN2 we should
         // enter an MMI code of the form **052*PUK2*NEW_PIN2*NEW_PIN2#, where
         // PUK2 should be entered as the SIA parameter and the new PIN2 as SIB
         // and SIC.
         if (!_isRadioAvailable(MMI_KS_SC_PUK2) ||
             !_isValidPINPUKRequest(MMI_KS_SC_PUK2)) {
           return;
         }
         options.mmiServiceCode = MMI_KS_SC_PUK2;
         options.puk = mmi.sia;
         options.newPin = mmi.sib;
         this.enterICCPUK2(options);
         return;
       // IMEI
       case MMI_SC_IMEI:
         // A device's IMEI can't change, so we only need to request it once.
         if (this.IMEI == null) {
           this.getIMEI(options);
           return;
         }
         // If we already had the device's IMEI, we just send it to chrome.
         options.mmiServiceCode = MMI_KS_SC_IMEI;
         options.success = true;
         options.statusMessage = this.IMEI;
         this.sendChromeMessage(options);
         return;
       // CLIP
       case MMI_SC_CLIP:
         options.mmiServiceCode = MMI_KS_SC_CLIP;
         options.procedure = mmi.procedure;
         if (options.procedure === MMI_PROCEDURE_INTERROGATION) {
           this.queryCLIP(options);
         } else {
           _sendMMIError(MMI_ERROR_KS_NOT_SUPPORTED, MMI_KS_SC_CLIP);
         }
         return;
       // CLIR (non-temporary ones)
       // TODO: Both dial() and sendMMI() functions should be unified at some
       // point in the future. In the mean time we handle temporary CLIR MMI
       // commands through the dial() function. Please see bug 889737.
       case MMI_SC_CLIR:
         options.mmiServiceCode = MMI_KS_SC_CLIR;
         options.procedure = mmi.procedure;
         switch (options.procedure) {
           case MMI_PROCEDURE_INTERROGATION:
             this.getCLIR(options);
             return;
           case MMI_PROCEDURE_ACTIVATION:
             options.clirMode = CLIR_INVOCATION;
             break;
           case MMI_PROCEDURE_DEACTIVATION:
             options.clirMode = CLIR_SUPPRESSION;
             break;
           default:
             _sendMMIError(MMI_ERROR_KS_NOT_SUPPORTED, MMI_KS_SC_CLIR);
             return;
         }
         options.isSetCLIR = true;
         this.setCLIR(options);
         return;
       // Call barring
       case MMI_SC_BAOC:
       case MMI_SC_BAOIC:
       case MMI_SC_BAOICxH:
       case MMI_SC_BAIC:
       case MMI_SC_BAICr:
       case MMI_SC_BA_ALL:
       case MMI_SC_BA_MO:
       case MMI_SC_BA_MT:
         options.mmiServiceCode = MMI_KS_SC_CALL_BARRING;
         options.password = mmi.sia || "";
         options.serviceClass = this._siToServiceClass(mmi.sib);
         options.facility = MMI_SC_TO_CB_FACILITY[sc];
         options.procedure = mmi.procedure;
         if (mmi.procedure === MMI_PROCEDURE_INTERROGATION) {
           this.queryICCFacilityLock(options);
           return;
         }
         if (mmi.procedure === MMI_PROCEDURE_ACTIVATION) {
           options.enabled = 1;
         } else if (mmi.procedure === MMI_PROCEDURE_DEACTIVATION) {
           options.enabled = 0;
         } else {
           _sendMMIError(MMI_ERROR_KS_NOT_SUPPORTED, MMI_KS_SC_CALL_BARRING);
           return;
         }
         this.setICCFacilityLock(options);
         return;
       // Call waiting
       case MMI_SC_CALL_WAITING:
         if (!_isRadioAvailable(MMI_KS_SC_CALL_WAITING)) {
           return;
         }
         options.mmiServiceCode = MMI_KS_SC_CALL_WAITING;
         if (mmi.procedure === MMI_PROCEDURE_INTERROGATION) {
           this._handleQueryMMICallWaiting(options);
           return;
         }
         if (mmi.procedure === MMI_PROCEDURE_ACTIVATION) {
           options.enabled = true;
         } else if (mmi.procedure === MMI_PROCEDURE_DEACTIVATION) {
           options.enabled = false;
         } else {
           _sendMMIError(MMI_ERROR_KS_NOT_SUPPORTED, MMI_KS_SC_CALL_WAITING);
           return;
         }
         options.serviceClass = this._siToServiceClass(mmi.sia);
         this._handleSetMMICallWaiting(options);
         return;
     }
     // If the MMI code is not a known code and is a recognized USSD request,
     // it shall still be sent as a USSD request.
     if (mmi.fullMMI) {
       if (!_isRadioAvailable(MMI_KS_SC_USSD)) {
         return;
       }
       options.ussd = mmi.fullMMI;
       options.mmiServiceCode = MMI_KS_SC_USSD;
       this.sendUSSD(options);
       return;
     }
     // At this point, the MMI string is considered as not valid MMI code and
     // not valid USSD code.
     _sendMMIError(MMI_ERROR_KS_ERROR);
   },
   /**
    * Send USSD.
    *
    * @param ussd
    *        String containing the USSD code.
    *
    */
    sendUSSD: function(options) {
      let Buf = this.context.Buf;
      Buf.newParcel(REQUEST_SEND_USSD, options);
      Buf.writeString(options.ussd);
      Buf.sendParcel();
    },
   /**
    * Cancel pending USSD.
    */
    cancelUSSD: function(options) {
      options.mmiServiceCode = MMI_KS_SC_USSD;
      this.context.Buf.simpleRequest(REQUEST_CANCEL_USSD, options);
    },
   /**
    * Queries current call forward rules.
    *
    * @param reason
    *        One of nsIDOMMozMobileCFInfo.CALL_FORWARD_REASON_* constants.
    * @param serviceClass
    *        One of ICC_SERVICE_CLASS_* constants.
    * @param number
    *        Phone number of forwarding address.
    */
   queryCallForwardStatus: function(options) {
     let Buf = this.context.Buf;
     let number = options.number || "";
     Buf.newParcel(REQUEST_QUERY_CALL_FORWARD_STATUS, options);
     Buf.writeInt32(CALL_FORWARD_ACTION_QUERY_STATUS);
     Buf.writeInt32(options.reason);
     Buf.writeInt32(options.serviceClass || ICC_SERVICE_CLASS_NONE);
     Buf.writeInt32(this._toaFromString(number));
     Buf.writeString(number);
     Buf.writeInt32(0);
     Buf.sendParcel();
   },
   /**
    * Configures call forward rule.
    *
    * @param action
    *        One of nsIDOMMozMobileCFInfo.CALL_FORWARD_ACTION_* constants.
    * @param reason
    *        One of nsIDOMMozMobileCFInfo.CALL_FORWARD_REASON_* constants.
    * @param serviceClass
    *        One of ICC_SERVICE_CLASS_* constants.
    * @param number
    *        Phone number of forwarding address.
    * @param timeSeconds
    *        Time in seconds to wait beforec all is forwarded.
    */
   setCallForward: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_SET_CALL_FORWARD, options);
     Buf.writeInt32(options.action);
     Buf.writeInt32(options.reason);
     Buf.writeInt32(options.serviceClass);
     Buf.writeInt32(this._toaFromString(options.number));
     Buf.writeString(options.number);
     Buf.writeInt32(options.timeSeconds);
     Buf.sendParcel();
   },
   /**
    * Queries current call barring rules.
    *
    * @param program
    *        One of nsIDOMMozMobileConnection.CALL_BARRING_PROGRAM_* constants.
    * @param serviceClass
    *        One of ICC_SERVICE_CLASS_* constants.
    */
   queryCallBarringStatus: function(options) {
     options.facility = CALL_BARRING_PROGRAM_TO_FACILITY[options.program];
     options.password = ""; // For query no need to provide it.
     this.queryICCFacilityLock(options);
   },
   /**
    * Configures call barring rule.
    *
    * @param program
    *        One of nsIDOMMozMobileConnection.CALL_BARRING_PROGRAM_* constants.
    * @param enabled
    *        Enable or disable the call barring.
    * @param password
    *        Barring password.
    * @param serviceClass
    *        One of ICC_SERVICE_CLASS_* constants.
    */
   setCallBarring: function(options) {
     options.facility = CALL_BARRING_PROGRAM_TO_FACILITY[options.program];
     this.setICCFacilityLock(options);
   },
   /**
    * Change call barring facility password.
    *
    * @param pin
    *        Old password.
    * @param newPin
    *        New password.
    */
   changeCallBarringPassword: function(options) {
     let Buf = this.context.Buf;
     Buf.newParcel(REQUEST_CHANGE_BARRING_PASSWORD, options);
     Buf.writeInt32(3);
     // Set facility to ICC_CB_FACILITY_BA_ALL by following TS.22.030 clause
     // 6.5.4 and Table B.1.
     Buf.writeString(ICC_CB_FACILITY_BA_ALL);
     Buf.writeString(options.pin);
     Buf.writeString(options.newPin);
     Buf.sendParcel();
   },
   /**
    * Handle STK CALL_SET_UP request.
    *
    * @param hasConfirmed
    *        Does use have confirmed the call requested from ICC?
    */
   stkHandleCallSetup: function(options) {
      let Buf = this.context.Buf;
      Buf.newParcel(REQUEST_STK_HANDLE_CALL_SETUP_REQUESTED_FROM_SIM);
      Buf.writeInt32(1);
      Buf.writeInt32(options.hasConfirmed ? 1 : 0);
      Buf.sendParcel();
   },
   /**
    * Send STK Profile Download.
    *
    * @param profile Profile supported by ME.
    */
   sendStkTerminalProfile: function(profile) {
     let Buf = this.context.Buf;
     let GsmPDUHelper = this.context.GsmPDUHelper;
     Buf.newParcel(REQUEST_STK_SET_PROFILE);
     Buf.writeInt32(profile.length * 2);
     for (let i = 0; i < profile.length; i++) {
       GsmPDUHelper.writeHexOctet(profile[i]);
     }
     Buf.writeInt32(0);
     Buf.sendParcel();
   },
   /**
    * Send STK terminal response.
    *
    * @param command
    * @param deviceIdentities
    * @param resultCode
    * @param [optional] itemIdentifier
    * @param [optional] input
    * @param [optional] isYesNo
    * @param [optional] hasConfirmed
    * @param [optional] localInfo
    * @param [optional] timer
    */
   sendStkTerminalResponse: function(response) {
     if (response.hasConfirmed !== undefined) {
       this.stkHandleCallSetup(response);
       return;
     }
     let Buf = this.context.Buf;
     let ComprehensionTlvHelper = this.context.ComprehensionTlvHelper;
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let command = response.command;
     Buf.newParcel(REQUEST_STK_SEND_TERMINAL_RESPONSE);
     // 1st mark for Parcel size
     Buf.startCalOutgoingSize(function(size) {
       // Parcel size is in string length, which costs 2 uint8 per char.
       Buf.writeInt32(size / 2);
     });
     // Command Details
     GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_COMMAND_DETAILS |
                                COMPREHENSIONTLV_FLAG_CR);
     GsmPDUHelper.writeHexOctet(3);
     if (response.command) {
       GsmPDUHelper.writeHexOctet(command.commandNumber);
       GsmPDUHelper.writeHexOctet(command.typeOfCommand);
       GsmPDUHelper.writeHexOctet(command.commandQualifier);
     } else {
       GsmPDUHelper.writeHexOctet(0x00);
       GsmPDUHelper.writeHexOctet(0x00);
       GsmPDUHelper.writeHexOctet(0x00);
     }
     // Device Identifier
     // According to TS102.223/TS31.111 section 6.8 Structure of
     // TERMINAL RESPONSE, "For all SIMPLE-TLV objects with Min=N,
     // the ME should set the CR(comprehension required) flag to
     // comprehension not required.(CR=0)"
     // Since DEVICE_IDENTITIES and DURATION TLVs have Min=N,
     // the CR flag is not set.
     GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_DEVICE_ID);
     GsmPDUHelper.writeHexOctet(2);
     GsmPDUHelper.writeHexOctet(STK_DEVICE_ID_ME);
     GsmPDUHelper.writeHexOctet(STK_DEVICE_ID_SIM);
     // Result
     GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_RESULT |
                                COMPREHENSIONTLV_FLAG_CR);
     GsmPDUHelper.writeHexOctet(1);
     GsmPDUHelper.writeHexOctet(response.resultCode);
     // Item Identifier
     if (response.itemIdentifier != null) {
       GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_ITEM_ID |
                                  COMPREHENSIONTLV_FLAG_CR);
       GsmPDUHelper.writeHexOctet(1);
       GsmPDUHelper.writeHexOctet(response.itemIdentifier);
     }
     // No need to process Text data if user requests help information.
     if (response.resultCode != STK_RESULT_HELP_INFO_REQUIRED) {
       let text;
       if (response.isYesNo !== undefined) {
         // GET_INKEY
         // When the ME issues a successful TERMINAL RESPONSE for a GET INKEY
         // ("Yes/No") command with command qualifier set to "Yes/No", it shall
         // supply the value '01' when the answer is "positive" and the value
         // '00' when the answer is "negative" in the Text string data object.
         text = response.isYesNo ? 0x01 : 0x00;
       } else {
         text = response.input;
       }
       if (text) {
         GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_TEXT_STRING |
                                    COMPREHENSIONTLV_FLAG_CR);
         // 2nd mark for text length
         Buf.startCalOutgoingSize(function(size) {
           // Text length is in number of hexOctets, which costs 4 uint8 per hexOctet.
           GsmPDUHelper.writeHexOctet(size / 4);
         });
         let coding = command.options.isUCS2 ?
                        STK_TEXT_CODING_UCS2 :
                        (command.options.isPacked ?
                           STK_TEXT_CODING_GSM_7BIT_PACKED :
                           STK_TEXT_CODING_GSM_8BIT);
         GsmPDUHelper.writeHexOctet(coding);
         // Write Text String.
         switch (coding) {
           case STK_TEXT_CODING_UCS2:
             GsmPDUHelper.writeUCS2String(text);
             break;
           case STK_TEXT_CODING_GSM_7BIT_PACKED:
             GsmPDUHelper.writeStringAsSeptets(text, 0, 0, 0);
             break;
           case STK_TEXT_CODING_GSM_8BIT:
             for (let i = 0; i < text.length; i++) {
               GsmPDUHelper.writeHexOctet(text.charCodeAt(i));
             }
             break;
         }
         // Calculate and write text length to 2nd mark
         Buf.stopCalOutgoingSize();
       }
     }
     // Local Information
     if (response.localInfo) {
       let localInfo = response.localInfo;
       // Location Infomation
       if (localInfo.locationInfo) {
         ComprehensionTlvHelper.writeLocationInfoTlv(localInfo.locationInfo);
       }
       // IMEI
       if (localInfo.imei != null) {
         let imei = localInfo.imei;
         if (imei.length == 15) {
           imei = imei + "0";
         }
         GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_IMEI);
         GsmPDUHelper.writeHexOctet(8);
         for (let i = 0; i < imei.length / 2; i++) {
           GsmPDUHelper.writeHexOctet(parseInt(imei.substr(i * 2, 2), 16));
         }
       }
       // Date and Time Zone
       if (localInfo.date != null) {
         ComprehensionTlvHelper.writeDateTimeZoneTlv(localInfo.date);
       }
       // Language
       if (localInfo.language) {
         ComprehensionTlvHelper.writeLanguageTlv(localInfo.language);
       }
     }
     // Timer
     if (response.timer) {
       let timer = response.timer;
       if (timer.timerId) {
         GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_TIMER_IDENTIFIER);
         GsmPDUHelper.writeHexOctet(1);
         GsmPDUHelper.writeHexOctet(timer.timerId);
       }
       if (timer.timerValue) {
         ComprehensionTlvHelper.writeTimerValueTlv(timer.timerValue, false);
       }
     }
     // Calculate and write Parcel size to 1st mark
     Buf.stopCalOutgoingSize();
     Buf.writeInt32(0);
     Buf.sendParcel();
   },
   /**
    * Send STK Envelope(Menu Selection) command.
    *
    * @param itemIdentifier
    * @param helpRequested
    */
   sendStkMenuSelection: function(command) {
     command.tag = BER_MENU_SELECTION_TAG;
     command.deviceId = {
       sourceId :STK_DEVICE_ID_KEYPAD,
       destinationId: STK_DEVICE_ID_SIM
     };
     this.sendICCEnvelopeCommand(command);
   },
   /**
    * Send STK Envelope(Timer Expiration) command.
    *
    * @param timer
    */
   sendStkTimerExpiration: function(command) {
     command.tag = BER_TIMER_EXPIRATION_TAG;
     command.deviceId = {
       sourceId: STK_DEVICE_ID_ME,
       destinationId: STK_DEVICE_ID_SIM
     };
     command.timerId = command.timer.timerId;
     command.timerValue = command.timer.timerValue;
     this.sendICCEnvelopeCommand(command);
   },
   /**
    * Send STK Envelope(Event Download) command.
    * @param event
    */
   sendStkEventDownload: function(command) {
     command.tag = BER_EVENT_DOWNLOAD_TAG;
     command.eventList = command.event.eventType;
     switch (command.eventList) {
       case STK_EVENT_TYPE_LOCATION_STATUS:
         command.deviceId = {
           sourceId :STK_DEVICE_ID_ME,
           destinationId: STK_DEVICE_ID_SIM
         };
         command.locationStatus = command.event.locationStatus;
         // Location info should only be provided when locationStatus is normal.
         if (command.locationStatus == STK_SERVICE_STATE_NORMAL) {
           command.locationInfo = command.event.locationInfo;
         }
         break;
       case STK_EVENT_TYPE_MT_CALL:
         command.deviceId = {
           sourceId: STK_DEVICE_ID_NETWORK,
           destinationId: STK_DEVICE_ID_SIM
         };
         command.transactionId = 0;
         command.address = command.event.number;
         break;
       case STK_EVENT_TYPE_CALL_DISCONNECTED:
         command.cause = command.event.error;
         // Fall through.
       case STK_EVENT_TYPE_CALL_CONNECTED:
         command.deviceId = {
           sourceId: (command.event.isIssuedByRemote ?
                      STK_DEVICE_ID_NETWORK : STK_DEVICE_ID_ME),
           destinationId: STK_DEVICE_ID_SIM
         };
         command.transactionId = 0;
         break;
       case STK_EVENT_TYPE_USER_ACTIVITY:
         command.deviceId = {
           sourceId: STK_DEVICE_ID_ME,
           destinationId: STK_DEVICE_ID_SIM
         };
         break;
       case STK_EVENT_TYPE_IDLE_SCREEN_AVAILABLE:
         command.deviceId = {
           sourceId: STK_DEVICE_ID_DISPLAY,
           destinationId: STK_DEVICE_ID_SIM
         };
         break;
       case STK_EVENT_TYPE_LANGUAGE_SELECTION:
         command.deviceId = {
           sourceId: STK_DEVICE_ID_ME,
           destinationId: STK_DEVICE_ID_SIM
         };
         command.language = command.event.language;
         break;
       case STK_EVENT_TYPE_BROWSER_TERMINATION:
         command.deviceId = {
           sourceId: STK_DEVICE_ID_ME,
           destinationId: STK_DEVICE_ID_SIM
         };
         command.terminationCause = command.event.terminationCause;
         break;
     }
     this.sendICCEnvelopeCommand(command);
   },
   /**
    * Send REQUEST_STK_SEND_ENVELOPE_COMMAND to ICC.
    *
    * @param tag
    * @patam deviceId
    * @param [optioanl] itemIdentifier
    * @param [optional] helpRequested
    * @param [optional] eventList
    * @param [optional] locationStatus
    * @param [optional] locationInfo
    * @param [optional] address
    * @param [optional] transactionId
    * @param [optional] cause
    * @param [optional] timerId
    * @param [optional] timerValue
    * @param [optional] terminationCause
    */
   sendICCEnvelopeCommand: function(options) {
     if (DEBUG) {
       this.context.debug("Stk Envelope " + JSON.stringify(options));
     }
     let Buf = this.context.Buf;
     let ComprehensionTlvHelper = this.context.ComprehensionTlvHelper;
     let GsmPDUHelper = this.context.GsmPDUHelper;
     Buf.newParcel(REQUEST_STK_SEND_ENVELOPE_COMMAND);
     // 1st mark for Parcel size
     Buf.startCalOutgoingSize(function(size) {
       // Parcel size is in string length, which costs 2 uint8 per char.
       Buf.writeInt32(size / 2);
     });
     // Write a BER-TLV
     GsmPDUHelper.writeHexOctet(options.tag);
     // 2nd mark for BER length
     Buf.startCalOutgoingSize(function(size) {
       // BER length is in number of hexOctets, which costs 4 uint8 per hexOctet.
       GsmPDUHelper.writeHexOctet(size / 4);
     });
     // Device Identifies
     GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_DEVICE_ID |
                                COMPREHENSIONTLV_FLAG_CR);
     GsmPDUHelper.writeHexOctet(2);
     GsmPDUHelper.writeHexOctet(options.deviceId.sourceId);
     GsmPDUHelper.writeHexOctet(options.deviceId.destinationId);
     // Item Identifier
     if (options.itemIdentifier != null) {
       GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_ITEM_ID |
                                  COMPREHENSIONTLV_FLAG_CR);
       GsmPDUHelper.writeHexOctet(1);
       GsmPDUHelper.writeHexOctet(options.itemIdentifier);
     }
     // Help Request
     if (options.helpRequested) {
       GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_HELP_REQUEST |
                                  COMPREHENSIONTLV_FLAG_CR);
       GsmPDUHelper.writeHexOctet(0);
       // Help Request doesn't have value
     }
     // Event List
     if (options.eventList != null) {
       GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_EVENT_LIST |
                                  COMPREHENSIONTLV_FLAG_CR);
       GsmPDUHelper.writeHexOctet(1);
       GsmPDUHelper.writeHexOctet(options.eventList);
     }
     // Location Status
     if (options.locationStatus != null) {
       let len = options.locationStatus.length;
       GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_LOCATION_STATUS |
                                  COMPREHENSIONTLV_FLAG_CR);
       GsmPDUHelper.writeHexOctet(1);
       GsmPDUHelper.writeHexOctet(options.locationStatus);
     }
     // Location Info
     if (options.locationInfo) {
       ComprehensionTlvHelper.writeLocationInfoTlv(options.locationInfo);
     }
     // Transaction Id
     if (options.transactionId != null) {
       GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_TRANSACTION_ID |
                                  COMPREHENSIONTLV_FLAG_CR);
       GsmPDUHelper.writeHexOctet(1);
       GsmPDUHelper.writeHexOctet(options.transactionId);
     }
     // Address
     if (options.address) {
       GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_ADDRESS |
                                  COMPREHENSIONTLV_FLAG_CR);
       ComprehensionTlvHelper.writeLength(
         Math.ceil(options.address.length/2) + 1 // address BCD + TON
       );
       this.context.ICCPDUHelper.writeDiallingNumber(options.address);
     }
     // Cause of disconnection.
     if (options.cause != null) {
       ComprehensionTlvHelper.writeCauseTlv(options.cause);
     }
     // Timer Identifier
     if (options.timerId != null) {
         GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_TIMER_IDENTIFIER |
                                    COMPREHENSIONTLV_FLAG_CR);
         GsmPDUHelper.writeHexOctet(1);
         GsmPDUHelper.writeHexOctet(options.timerId);
     }
     // Timer Value
     if (options.timerValue != null) {
         ComprehensionTlvHelper.writeTimerValueTlv(options.timerValue, true);
     }
     // Language
     if (options.language) {
       ComprehensionTlvHelper.writeLanguageTlv(options.language);
     }
     // Browser Termination
     if (options.terminationCause != null) {
       GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_BROWSER_TERMINATION_CAUSE |
                                  COMPREHENSIONTLV_FLAG_CR);
       GsmPDUHelper.writeHexOctet(1);
       GsmPDUHelper.writeHexOctet(options.terminationCause);
     }
     // Calculate and write BER length to 2nd mark
     Buf.stopCalOutgoingSize();
     // Calculate and write Parcel size to 1st mark
     Buf.stopCalOutgoingSize();
     Buf.writeInt32(0);
     Buf.sendParcel();
   },
   /**
    * Check a given number against the list of emergency numbers provided by the RIL.
    *
    * @param number
    *        The number to look up.
    */
    _isEmergencyNumber: function(number) {
      // Check ril provided numbers first.
      let numbers = RIL_EMERGENCY_NUMBERS;
      if (numbers) {
        numbers = numbers.split(",");
      } else {
        // No ecclist system property, so use our own list.
        numbers = DEFAULT_EMERGENCY_NUMBERS;
      }
      return numbers.indexOf(number) != -1;
    },
    /**
     * Checks whether to temporarily suppress caller id for the call.
     *
     * @param mmi
     *        MMI full object.
     */
    _isTemporaryModeCLIR: function(mmi) {
      return (mmi &&
              mmi.serviceCode == MMI_SC_CLIR &&
              mmi.dialNumber &&
              (mmi.procedure == MMI_PROCEDURE_ACTIVATION ||
               mmi.procedure == MMI_PROCEDURE_DEACTIVATION));
    },
   /**
    * Report STK Service is running.
    */
   reportStkServiceIsRunning: function() {
     this.context.Buf.simpleRequest(REQUEST_REPORT_STK_SERVICE_IS_RUNNING);
   },
   /**
    * Process ICC status.
    */
   _processICCStatus: function(iccStatus) {
     // If |_waitingRadioTech| is true, we should not get app information because
     // the |_isCdma| flag is not ready yet. Otherwise we may use wrong index to
     // get app information, especially for the case that icc card has both cdma
     // and gsm subscription.
     if (this._waitingRadioTech) {
       return;
     }
     this.iccStatus = iccStatus;
     let newCardState;
     let index = this._isCdma ? iccStatus.cdmaSubscriptionAppIndex :
                                iccStatus.gsmUmtsSubscriptionAppIndex;
     let app = iccStatus.apps[index];
     // When |iccStatus.cardState| is not CARD_STATE_PRESENT or have incorrect
     // app information, we can not get iccId. So treat ICC as undetected.
     if (iccStatus.cardState !== CARD_STATE_PRESENT || !app) {
       if (this.cardState !== GECKO_CARDSTATE_UNDETECTED) {
         this.operator = null;
         // We should send |cardstatechange| before |iccinfochange|, otherwise we
         // may lost cardstatechange event when icc card becomes undetected.
         this.cardState = GECKO_CARDSTATE_UNDETECTED;
         this.sendChromeMessage({rilMessageType: "cardstatechange",
                                 cardState: this.cardState});
         this.iccInfo = {iccType: null};
         this.context.ICCUtilsHelper.handleICCInfoChange();
       }
       return;
     }
     let ICCRecordHelper = this.context.ICCRecordHelper;
     // fetchICCRecords will need to read aid, so read aid here.
     this.aid = app.aid;
     this.appType = app.app_type;
     this.iccInfo.iccType = GECKO_CARD_TYPE[this.appType];
     // Try to get iccId only when cardState left GECKO_CARDSTATE_UNDETECTED.
     if (iccStatus.cardState === CARD_STATE_PRESENT &&
         (this.cardState === GECKO_CARDSTATE_UNINITIALIZED ||
          this.cardState === GECKO_CARDSTATE_UNDETECTED)) {
       ICCRecordHelper.readICCID();
     }
     switch (app.app_state) {
       case CARD_APPSTATE_ILLEGAL:
         newCardState = GECKO_CARDSTATE_ILLEGAL;
         break;
       case CARD_APPSTATE_PIN:
         newCardState = GECKO_CARDSTATE_PIN_REQUIRED;
         break;
       case CARD_APPSTATE_PUK:
         newCardState = GECKO_CARDSTATE_PUK_REQUIRED;
         break;
       case CARD_APPSTATE_SUBSCRIPTION_PERSO:
         newCardState = PERSONSUBSTATE[app.perso_substate];
         break;
       case CARD_APPSTATE_READY:
         newCardState = GECKO_CARDSTATE_READY;
         break;
       case CARD_APPSTATE_UNKNOWN:
       case CARD_APPSTATE_DETECTED:
         // Fall through.
       default:
         newCardState = GECKO_CARDSTATE_UNKNOWN;
     }
     let pin1State = app.pin1_replaced ? iccStatus.universalPINState :
                                         app.pin1;
     if (pin1State === CARD_PINSTATE_ENABLED_PERM_BLOCKED) {
       newCardState = GECKO_CARDSTATE_PERMANENT_BLOCKED;
     }
     if (this.cardState == newCardState) {
       return;
     }
     // This was moved down from CARD_APPSTATE_READY
     this.requestNetworkInfo();
     if (newCardState == GECKO_CARDSTATE_READY) {
       // For type SIM, we need to check EF_phase first.
       // Other types of ICC we can send Terminal_Profile immediately.
       if (this.appType == CARD_APPTYPE_SIM) {
         this.context.SimRecordHelper.readSimPhase();
       } else if (RILQUIRKS_SEND_STK_PROFILE_DOWNLOAD) {
         this.sendStkTerminalProfile(STK_SUPPORTED_TERMINAL_PROFILE);
       }
       ICCRecordHelper.fetchICCRecords();
     }
     this.cardState = newCardState;
     this.sendChromeMessage({rilMessageType: "cardstatechange",
                             cardState: this.cardState});
   },
    /**
    * Helper for processing responses of functions such as enterICC* and changeICC*.
    */
   _processEnterAndChangeICCResponses: function(length, options) {
     options.success = (options.rilRequestError === 0);
     if (!options.success) {
       options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     }
     options.retryCount = length ? this.context.Buf.readInt32List()[0] : -1;
     if (options.rilMessageType != "sendMMI") {
       this.sendChromeMessage(options);
       return;
     }
     let mmiServiceCode = options.mmiServiceCode;
     if (options.success) {
       switch (mmiServiceCode) {
         case MMI_KS_SC_PIN:
           options.statusMessage = MMI_SM_KS_PIN_CHANGED;
           break;
         case MMI_KS_SC_PIN2:
           options.statusMessage = MMI_SM_KS_PIN2_CHANGED;
           break;
         case MMI_KS_SC_PUK:
           options.statusMessage = MMI_SM_KS_PIN_UNBLOCKED;
           break;
         case MMI_KS_SC_PUK2:
           options.statusMessage = MMI_SM_KS_PIN2_UNBLOCKED;
           break;
       }
     } else {
       if (options.retryCount <= 0) {
         if (mmiServiceCode === MMI_KS_SC_PUK) {
           options.errorMsg = MMI_ERROR_KS_SIM_BLOCKED;
         } else if (mmiServiceCode === MMI_KS_SC_PIN) {
           options.errorMsg = MMI_ERROR_KS_NEEDS_PUK;
         }
       } else {
         if (mmiServiceCode === MMI_KS_SC_PIN ||
             mmiServiceCode === MMI_KS_SC_PIN2) {
           options.errorMsg = MMI_ERROR_KS_BAD_PIN;
         } else if (mmiServiceCode === MMI_KS_SC_PUK ||
                    mmiServiceCode === MMI_KS_SC_PUK2) {
           options.errorMsg = MMI_ERROR_KS_BAD_PUK;
         }
         if (options.retryCount !== undefined) {
           options.additionalInformation = options.retryCount;
         }
       }
     }
     this.sendChromeMessage(options);
   },
   // We combine all of the NETWORK_INFO_MESSAGE_TYPES into one "networkinfochange"
   // message to the RadioInterfaceLayer, so we can avoid sending multiple
   // VoiceInfoChanged events for both operator / voice_data_registration
   //
   // State management here is a little tricky. We need to know both:
   // 1. Whether or not a response was received for each of the
   //    NETWORK_INFO_MESSAGE_TYPES
   // 2. The outbound message that corresponds with that response -- but this
   //    only happens when internal state changes (i.e. it isn't guaranteed)
   //
   // To collect this state, each message response function first calls
   // _receivedNetworkInfo, to mark the response as received. When the
   // final response is received, a call to _sendPendingNetworkInfo is placed
   // on the next tick of the worker thread.
   //
   // Since the original call to _receivedNetworkInfo happens at the top
   // of the response handler, this gives the final handler a chance to
   // queue up it's "changed" message by calling _sendNetworkInfoMessage if/when
   // the internal state has actually changed.
   _sendNetworkInfoMessage: function(type, message) {
     if (!this._processingNetworkInfo) {
       // We only combine these messages in the case of the combined request
       // in requestNetworkInfo()
       this.sendChromeMessage(message);
       return;
     }
     if (DEBUG) {
       this.context.debug("Queuing " + type + " network info message: " +
                          JSON.stringify(message));
     }
     this._pendingNetworkInfo[type] = message;
   },
   _receivedNetworkInfo: function(type) {
     if (DEBUG) this.context.debug("Received " + type + " network info.");
     if (!this._processingNetworkInfo) {
       return;
     }
     let pending = this._pendingNetworkInfo;
     // We still need to track states for events that aren't fired.
     if (!(type in pending)) {
       pending[type] = this.pendingNetworkType;
     }
     // Pending network info is ready to be sent when no more messages
     // are waiting for responses, but the combined payload hasn't been sent.
     for (let i = 0; i < NETWORK_INFO_MESSAGE_TYPES.length; i++) {
       let msgType = NETWORK_INFO_MESSAGE_TYPES[i];
       if (!(msgType in pending)) {
         if (DEBUG) {
           this.context.debug("Still missing some more network info, not " +
                              "notifying main thread.");
         }
         return;
       }
     }
     // Do a pass to clean up the processed messages that didn't create
     // a response message, so we don't have unused keys in the outbound
     // networkinfochanged message.
     for (let key in pending) {
       if (pending[key] == this.pendingNetworkType) {
         delete pending[key];
       }
     }
     if (DEBUG) {
       this.context.debug("All pending network info has been received: " +
                          JSON.stringify(pending));
     }
     // Send the message on the next tick of the worker's loop, so we give the
     // last message a chance to call _sendNetworkInfoMessage first.
     setTimeout(this._sendPendingNetworkInfo.bind(this), 0);
   },
   _sendPendingNetworkInfo: function() {
     this.sendChromeMessage(this._pendingNetworkInfo);
     this._processingNetworkInfo = false;
     for (let i = 0; i < NETWORK_INFO_MESSAGE_TYPES.length; i++) {
       delete this._pendingNetworkInfo[NETWORK_INFO_MESSAGE_TYPES[i]];
     }
     if (this._needRepollNetworkInfo) {
       this._needRepollNetworkInfo = false;
       this.requestNetworkInfo();
     }
   },
   /**
    * Normalize the signal strength in dBm to the signal level from 0 to 100.
    *
    * @param signal
    *        The signal strength in dBm to normalize.
    * @param min
    *        The signal strength in dBm maps to level 0.
    * @param max
    *        The signal strength in dBm maps to level 100.
    *
    * @return level
    *         The signal level from 0 to 100.
    */
   _processSignalLevel: function(signal, min, max) {
     if (signal <= min) {
       return 0;
     }
     if (signal >= max) {
       return 100;
     }
     return Math.floor((signal - min) * 100 / (max - min));
   },
   /**
    * Process LTE signal strength to the signal info object.
    *
    * @param signal
    *        The signal object reported from RIL/modem.
    *
    * @return The object of signal strength info.
    *         Or null if invalid signal input.
    */
   _processLteSignal: function(signal) {
     // Valid values are 0-63 as defined in TS 27.007 clause 8.69.
     if (signal.lteSignalStrength === undefined ||
         signal.lteSignalStrength < 0 ||
         signal.lteSignalStrength > 63) {
       return null;
     }
     let info = {
       voice: {
         signalStrength:    null,
         relSignalStrength: null
       },
       data: {
         signalStrength:    null,
         relSignalStrength: null
       }
     };
     // TODO: Bug 982013: reconsider signalStrength/relSignalStrength APIs for
     //       GSM/CDMA/LTE, and take rsrp/rssnr into account for LTE case then.
     let signalStrength = -111 + signal.lteSignalStrength;
     info.voice.signalStrength = info.data.signalStrength = signalStrength;
     // 0 and 12 are referred to AOSP's implementation. These values are not
     // constants and can be customized based on different requirements.
     let signalLevel = this._processSignalLevel(signal.lteSignalStrength, 0, 12);
     info.voice.relSignalStrength = info.data.relSignalStrength = signalLevel;
     return info;
   },
   _processSignalStrength: function(signal) {
     let info = {
       voice: {
         signalStrength:    null,
         relSignalStrength: null
       },
       data: {
         signalStrength:    null,
         relSignalStrength: null
       }
     };
     // During startup, |radioTech| is not yet defined, so we need to
     // check it separately.
     if (("radioTech" in this.voiceRegistrationState) &&
         !this._isGsmTechGroup(this.voiceRegistrationState.radioTech)) {
       // CDMA RSSI.
       // Valid values are positive integers. This value is the actual RSSI value
       // multiplied by -1. Example: If the actual RSSI is -75, then this
       // response value will be 75.
       if (signal.cdmaDBM && signal.cdmaDBM > 0) {
         let signalStrength = -1 * signal.cdmaDBM;
         info.voice.signalStrength = signalStrength;
         // -105 and -70 are referred to AOSP's implementation. These values are
         // not constants and can be customized based on different requirement.
         let signalLevel = this._processSignalLevel(signalStrength, -105, -70);
         info.voice.relSignalStrength = signalLevel;
       }
       // EVDO RSSI.
       // Valid values are positive integers. This value is the actual RSSI value
       // multiplied by -1. Example: If the actual RSSI is -75, then this
       // response value will be 75.
       if (signal.evdoDBM && signal.evdoDBM > 0) {
         let signalStrength = -1 * signal.evdoDBM;
         info.data.signalStrength = signalStrength;
         // -105 and -70 are referred to AOSP's implementation. These values are
         // not constants and can be customized based on different requirement.
         let signalLevel = this._processSignalLevel(signalStrength, -105, -70);
         info.data.relSignalStrength = signalLevel;
       }
     } else {
       // Check LTE level first, and check GSM/UMTS level next if LTE one is not
       // valid.
       let lteInfo = this._processLteSignal(signal);
       if (lteInfo) {
         info = lteInfo;
       } else {
         // GSM signal strength.
         // Valid values are 0-31 as defined in TS 27.007 8.5.
         // 0     : -113 dBm or less
         // 1     : -111 dBm
         // 2...30: -109...-53 dBm
         // 31    : -51 dBm
         if (signal.gsmSignalStrength &&
             signal.gsmSignalStrength >= 0 &&
             signal.gsmSignalStrength <= 31) {
           let signalStrength = -113 + 2 * signal.gsmSignalStrength;
           info.voice.signalStrength = info.data.signalStrength = signalStrength;
           // -115 and -85 are referred to AOSP's implementation. These values are
           // not constants and can be customized based on different requirement.
           let signalLevel = this._processSignalLevel(signalStrength, -110, -85);
           info.voice.relSignalStrength = info.data.relSignalStrength = signalLevel;
         }
       }
     }
     info.rilMessageType = "signalstrengthchange";
     this._sendNetworkInfoMessage(NETWORK_INFO_SIGNAL, info);
     if (this.cachedDialRequest && info.voice.signalStrength) {
       // Radio is ready for making the cached emergency call.
       this.cachedDialRequest.callback();
       this.cachedDialRequest = null;
     }
   },
   /**
    * Process the network registration flags.
    *
    * @return true if the state changed, false otherwise.
    */
   _processCREG: function(curState, newState) {
     let changed = false;
     let regState = this.parseInt(newState[0], NETWORK_CREG_STATE_UNKNOWN);
     if (curState.regState === undefined || curState.regState !== regState) {
       changed = true;
       curState.regState = regState;
       curState.state = NETWORK_CREG_TO_GECKO_MOBILE_CONNECTION_STATE[regState];
       curState.connected = regState == NETWORK_CREG_STATE_REGISTERED_HOME ||
                            regState == NETWORK_CREG_STATE_REGISTERED_ROAMING;
       curState.roaming = regState == NETWORK_CREG_STATE_REGISTERED_ROAMING;
       curState.emergencyCallsOnly = !curState.connected;
     }
     if (!curState.cell) {
       curState.cell = {};
     }
     // From TS 23.003, 0000 and 0xfffe are indicated that no valid LAI exists
     // in MS. So we still need to report the '0000' as well.
     let lac = this.parseInt(newState[1], -1, 16);
     if (curState.cell.gsmLocationAreaCode === undefined ||
         curState.cell.gsmLocationAreaCode !== lac) {
       curState.cell.gsmLocationAreaCode = lac;
       changed = true;
     }
     let cid = this.parseInt(newState[2], -1, 16);
     if (curState.cell.gsmCellId === undefined ||
         curState.cell.gsmCellId !== cid) {
       curState.cell.gsmCellId = cid;
       changed = true;
     }
     let radioTech = (newState[3] === undefined ?
                      NETWORK_CREG_TECH_UNKNOWN :
                      this.parseInt(newState[3], NETWORK_CREG_TECH_UNKNOWN));
     if (curState.radioTech === undefined || curState.radioTech !== radioTech) {
       changed = true;
       curState.radioTech = radioTech;
       curState.type = GECKO_RADIO_TECH[radioTech] || null;
     }
     return changed;
   },
   _processVoiceRegistrationState: function(state) {
     let rs = this.voiceRegistrationState;
     let stateChanged = this._processCREG(rs, state);
     if (stateChanged && rs.connected) {
       this.getSmscAddress();
     }
     let cell = rs.cell;
     if (this._isCdma) {
       // Some variables below are not used. Comment them instead of removing to
       // keep the information about state[x].
       let cdmaBaseStationId = this.parseInt(state[4], -1);
       let cdmaBaseStationLatitude = this.parseInt(state[5], -2147483648);
       let cdmaBaseStationLongitude = this.parseInt(state[6], -2147483648);
       // let cssIndicator = this.parseInt(state[7]);
       let cdmaSystemId = this.parseInt(state[8], -1);
       let cdmaNetworkId = this.parseInt(state[9], -1);
       // let roamingIndicator = this.parseInt(state[10]);
       // let systemIsInPRL = this.parseInt(state[11]);
       // let defaultRoamingIndicator = this.parseInt(state[12]);
       // let reasonForDenial = this.parseInt(state[13]);
       if (cell.cdmaBaseStationId !== cdmaBaseStationId ||
           cell.cdmaBaseStationLatitude !== cdmaBaseStationLatitude ||
           cell.cdmaBaseStationLongitude !== cdmaBaseStationLongitude ||
           cell.cdmaSystemId !== cdmaSystemId ||
           cell.cdmaNetworkId !== cdmaNetworkId) {
         stateChanged = true;
         cell.cdmaBaseStationId = cdmaBaseStationId;
         cell.cdmaBaseStationLatitude = cdmaBaseStationLatitude;
         cell.cdmaBaseStationLongitude = cdmaBaseStationLongitude;
         cell.cdmaSystemId = cdmaSystemId;
         cell.cdmaNetworkId = cdmaNetworkId;
       }
     }
     if (stateChanged) {
       rs.rilMessageType = "voiceregistrationstatechange";
       this._sendNetworkInfoMessage(NETWORK_INFO_VOICE_REGISTRATION_STATE, rs);
     }
   },
   _processDataRegistrationState: function(state) {
     let rs = this.dataRegistrationState;
     let stateChanged = this._processCREG(rs, state);
     if (stateChanged) {
       rs.rilMessageType = "dataregistrationstatechange";
       this._sendNetworkInfoMessage(NETWORK_INFO_DATA_REGISTRATION_STATE, rs);
     }
   },
   _processOperator: function(operatorData) {
     if (operatorData.length < 3) {
       if (DEBUG) {
         this.context.debug("Expected at least 3 strings for operator.");
       }
     }
     if (!this.operator) {
       this.operator = {
         rilMessageType: "operatorchange",
         longName: null,
         shortName: null
       };
     }
     let [longName, shortName, networkTuple] = operatorData;
     let thisTuple = (this.operator.mcc || "") + (this.operator.mnc || "");
     if (this.operator.longName !== longName ||
         this.operator.shortName !== shortName ||
         thisTuple !== networkTuple) {
       this.operator.mcc = null;
       this.operator.mnc = null;
       if (networkTuple) {
         try {
           this._processNetworkTuple(networkTuple, this.operator);
         } catch (e) {
           if (DEBUG) this.context.debug("Error processing operator tuple: " + e);
         }
       } else {
         // According to ril.h, the operator fields will be NULL when the operator
         // is not currently registered. We can avoid trying to parse the numeric
         // tuple in that case.
         if (DEBUG) {
           this.context.debug("Operator is currently unregistered");
         }
       }
       let ICCUtilsHelper = this.context.ICCUtilsHelper;
       let networkName;
       // We won't get network name using PNN and OPL if voice registration isn't ready
       if (this.voiceRegistrationState.cell &&
           this.voiceRegistrationState.cell.gsmLocationAreaCode != -1) {
         networkName = ICCUtilsHelper.getNetworkNameFromICC(
           this.operator.mcc,
           this.operator.mnc,
           this.voiceRegistrationState.cell.gsmLocationAreaCode);
       }
       if (networkName) {
         if (DEBUG) {
           this.context.debug("Operator names will be overriden: " +
                              "longName = " + networkName.fullName + ", " +
                              "shortName = " + networkName.shortName);
         }
         this.operator.longName = networkName.fullName;
         this.operator.shortName = networkName.shortName;
       } else {
         this.operator.longName = longName;
         this.operator.shortName = shortName;
       }
       if (ICCUtilsHelper.updateDisplayCondition()) {
         ICCUtilsHelper.handleICCInfoChange();
       }
       this._sendNetworkInfoMessage(NETWORK_INFO_OPERATOR, this.operator);
     }
   },
   /**
    * Helpers for processing call state and handle the active call.
    */
   _processCalls: function(newCalls) {
     let conferenceChanged = false;
     let clearConferenceRequest = false;
     let pendingOutgoingCall = null;
     // Go through the calls we currently have on file and see if any of them
     // changed state. Remove them from the newCalls map as we deal with them
     // so that only new calls remain in the map after we're done.
     for each (let currentCall in this.currentCalls) {
       if (currentCall.callIndex == OUTGOING_PLACEHOLDER_CALL_INDEX) {
         pendingOutgoingCall = currentCall;
         continue;
       }
       let newCall;
       if (newCalls) {
         newCall = newCalls[currentCall.callIndex];
         delete newCalls[currentCall.callIndex];
       }
       // Call is no longer reported by the radio. Remove from our map and send
       // disconnected state change.
       if (!newCall) {
         if (this.currentConference.participants[currentCall.callIndex]) {
           conferenceChanged = true;
         }
         this._removeVoiceCall(currentCall,
                               currentCall.hangUpLocal ?
                                 GECKO_CALL_ERROR_NORMAL_CALL_CLEARING : null);
         continue;
       }
       // Call is still valid.
       if (newCall.state == currentCall.state &&
           newCall.isMpty == currentCall.isMpty) {
         continue;
       }
       // State has changed.
       if (newCall.state == CALL_STATE_INCOMING &&
           currentCall.state == CALL_STATE_WAITING) {
         // Update the call internally but we don't notify chrome since these two
         // states are viewed as the same one there.
         currentCall.state = newCall.state;
         continue;
       }
       if (!currentCall.started && newCall.state == CALL_STATE_ACTIVE) {
         currentCall.started = new Date().getTime();
       }
       if (currentCall.isMpty == newCall.isMpty &&
           newCall.state != currentCall.state) {
         currentCall.state = newCall.state;
         if (currentCall.isConference) {
           conferenceChanged = true;
         }
         this._handleChangedCallState(currentCall);
         continue;
       }
       // '.isMpty' becomes false when the conference call is put on hold.
       // We need to introduce additional 'isConference' to correctly record the
       // real conference status
       // Update a possible conference participant when .isMpty changes.
       if (!currentCall.isMpty && newCall.isMpty) {
         if (this._hasConferenceRequest) {
           conferenceChanged = true;
           clearConferenceRequest = true;
           currentCall.state = newCall.state;
           currentCall.isMpty = newCall.isMpty;
           currentCall.isConference = true;
           this.currentConference.participants[currentCall.callIndex] = currentCall;
           this._handleChangedCallState(currentCall);
         } else if (currentCall.isConference) {
           // The case happens when resuming a held conference call.
           conferenceChanged = true;
           currentCall.state = newCall.state;
           currentCall.isMpty = newCall.isMpty;
           this.currentConference.participants[currentCall.callIndex] = currentCall;
           this._handleChangedCallState(currentCall);
         } else {
           // Weird. This sometimes happens when we switch two calls, but it is
           // not a conference call.
           currentCall.state = newCall.state;
           this._handleChangedCallState(currentCall);
         }
       } else if (currentCall.isMpty && !newCall.isMpty) {
         if (!this.currentConference.participants[newCall.callIndex]) {
           continue;
         }
         // '.isMpty' of a conference participant is set to false by rild when
         // the conference call is put on hold. We don't actually know if the call
         // still attends the conference until updating all calls finishes. We
         // cache it for further determination.
         if (newCall.state != CALL_STATE_HOLDING) {
           delete this.currentConference.participants[newCall.callIndex];
           currentCall.state = newCall.state;
           currentCall.isMpty = newCall.isMpty;
           currentCall.isConference = false;
           conferenceChanged = true;
           this._handleChangedCallState(currentCall);
           continue;
         }
         if (!this.currentConference.cache) {
           this.currentConference.cache = {};
         }
         this.currentConference.cache[currentCall.callIndex] = newCall;
         currentCall.state = newCall.state;
         currentCall.isMpty = newCall.isMpty;
         conferenceChanged = true;
       }
     }
     if (pendingOutgoingCall) {
       if (!newCalls || Object.keys(newCalls).length === 0) {
         // We don't get a successful call for pendingOutgoingCall.
         this._removePendingOutgoingCall(GECKO_CALL_ERROR_UNSPECIFIED);
       } else {
         // Only remove it from currentCalls map. Will use the new call to
         // replace the placeholder.
         delete this.currentCalls[OUTGOING_PLACEHOLDER_CALL_INDEX];
       }
     }
     // Go through any remaining calls that are new to us.
     for each (let newCall in newCalls) {
       if (newCall.isVoice) {
         if (newCall.isMpty) {
           conferenceChanged = true;
         }
         if (!pendingOutgoingCall &&
             (newCall.state === CALL_STATE_DIALING ||
              newCall.state === CALL_STATE_ALERTING)) {
           // Receive a new outgoing call which is already hung up by user.
           if (DEBUG) this.context.debug("Pending outgoing call is hung up by user.");
           this.sendHangUpRequest(newCall.callIndex);
         } else {
           this._addNewVoiceCall(newCall);
         }
       }
     }
     if (clearConferenceRequest) {
       this._hasConferenceRequest = false;
     }
     if (conferenceChanged) {
       this._ensureConference();
     }
   },
   _addNewVoiceCall: function(newCall) {
     // Format international numbers appropriately.
     if (newCall.number && newCall.toa == TOA_INTERNATIONAL &&
         newCall.number[0] != "+") {
       newCall.number = "+" + newCall.number;
     }
     if (newCall.state == CALL_STATE_INCOMING) {
       newCall.isOutgoing = false;
     } else if (newCall.state == CALL_STATE_DIALING) {
       newCall.isOutgoing = true;
     }
     // Set flag for outgoing emergency call.
     newCall.isEmergency = newCall.isOutgoing &&
       this._isEmergencyNumber(newCall.number);
     // Set flag for conference.
     newCall.isConference = newCall.isMpty ? true : false;
     // Add to our map.
     if (newCall.isMpty) {
       this.currentConference.participants[newCall.callIndex] = newCall;
     }
     this._handleChangedCallState(newCall);
     this.currentCalls[newCall.callIndex] = newCall;
   },
   _removeVoiceCall: function(removedCall, failCause) {
     if (this.currentConference.participants[removedCall.callIndex]) {
       removedCall.isConference = false;
       delete this.currentConference.participants[removedCall.callIndex];
       delete this.currentCalls[removedCall.callIndex];
       // We don't query the fail cause here as it triggers another asynchrouns
       // request that leads to a problem of updating all conferece participants
       // in one task.
       this._handleDisconnectedCall(removedCall);
     } else {
       delete this.currentCalls[removedCall.callIndex];
       if (failCause) {
         removedCall.failCause = failCause;
         this._handleDisconnectedCall(removedCall);
       } else {
         this.getFailCauseCode((function(call, failCause) {
           call.failCause = failCause;
           this._handleDisconnectedCall(call);
         }).bind(this, removedCall));
       }
     }
   },
   _createPendingOutgoingCall: function(options) {
     if (DEBUG) this.context.debug("Create a pending outgoing call.");
     this._addNewVoiceCall({
       number: options.number,
       state: CALL_STATE_DIALING,
       callIndex: OUTGOING_PLACEHOLDER_CALL_INDEX
     });
   },
   _removePendingOutgoingCall: function(failCause) {
     let call = this.currentCalls[OUTGOING_PLACEHOLDER_CALL_INDEX];
     if (!call) {
       return;
     }
     if (DEBUG) this.context.debug("Remove pending outgoing call.");
     this._removeVoiceCall(pendingOutgoingCall, failCause);
   },
   _ensureConference: function() {
     let oldState = this.currentConference.state;
     let remaining = Object.keys(this.currentConference.participants);
     if (remaining.length == 1) {
       // Remove that if only does one remain in a conference call.
       let call = this.currentCalls[remaining[0]];
       call.isConference = false;
       this._handleChangedCallState(call);
       delete this.currentConference.participants[call.callIndex];
     } else if (remaining.length > 1) {
       for each (let call in this.currentConference.cache) {
         call.isConference = true;
         this.currentConference.participants[call.callIndex] = call;
         this.currentCalls[call.callIndex] = call;
         this._handleChangedCallState(call);
       }
     }
     delete this.currentConference.cache;
     // Update the conference call's state.
     let state = CALL_STATE_UNKNOWN;
     for each (let call in this.currentConference.participants) {
       if (state != CALL_STATE_UNKNOWN && state != call.state) {
         // Each participant should have the same state, otherwise something
         // wrong happens.
         state = CALL_STATE_UNKNOWN;
         break;
       }
       state = call.state;
     }
     if (oldState != state) {
       this.currentConference.state = state;
       let message = {rilMessageType: "conferenceCallStateChanged",
                      state: state};
       this.sendChromeMessage(message);
     }
   },
   _handleChangedCallState: function(changedCall) {
     let message = {rilMessageType: "callStateChange",
                    call: changedCall};
     this.sendChromeMessage(message);
   },
   _handleDisconnectedCall: function(disconnectedCall) {
     let message = {rilMessageType: "callDisconnected",
                    call: disconnectedCall};
     this.sendChromeMessage(message);
   },
   _sendDataCallError: function(message, errorCode) {
     // Should not include token for unsolicited response.
     delete message.rilMessageToken;
     message.rilMessageType = "datacallerror";
     if (errorCode == ERROR_GENERIC_FAILURE) {
       message.errorMsg = RIL_ERROR_TO_GECKO_ERROR[errorCode];
     } else {
       message.errorMsg = RIL_DATACALL_FAILCAUSE_TO_GECKO_DATACALL_ERROR[errorCode];
     }
     this.sendChromeMessage(message);
   },
   /**
    * @return "deactivate" if <ifname> changes or one of the currentDataCall
    *         addresses is missing in updatedDataCall, or "identical" if no
    *         changes found, or "changed" otherwise.
    */
   _compareDataCallLink: function(updatedDataCall, currentDataCall) {
     // If network interface is changed, report as "deactivate".
     if (updatedDataCall.ifname != currentDataCall.ifname) {
       return "deactivate";
     }
     // If any existing address is missing, report as "deactivate".
     for (let i = 0; i < currentDataCall.addresses.length; i++) {
       let address = currentDataCall.addresses[i];
       if (updatedDataCall.addresses.indexOf(address) < 0) {
         return "deactivate";
       }
     }
     if (currentDataCall.addresses.length != updatedDataCall.addresses.length) {
       // Since now all |currentDataCall.addresses| are found in
       // |updatedDataCall.addresses|, this means one or more new addresses are
       // reported.
       return "changed";
     }
     let fields = ["gateways", "dnses"];
     for (let i = 0; i < fields.length; i++) {
       // Compare <datacall>.<field>.
       let field = fields[i];
       let lhs = updatedDataCall[field], rhs = currentDataCall[field];
       if (lhs.length != rhs.length) {
         return "changed";
       }
       for (let i = 0; i < lhs.length; i++) {
         if (lhs[i] != rhs[i]) {
           return "changed";
         }
       }
     }
     return "identical";
   },
   _processDataCallList: function(datacalls, newDataCallOptions) {
     // Check for possible PDP errors: We check earlier because the datacall
     // can be removed if is the same as the current one.
     for each (let newDataCall in datacalls) {
       if (newDataCall.status != DATACALL_FAIL_NONE) {
         if (newDataCallOptions) {
           newDataCall.apn = newDataCallOptions.apn;
         }
         this._sendDataCallError(newDataCall, newDataCall.status);
       }
     }
     for each (let currentDataCall in this.currentDataCalls) {
       let updatedDataCall;
       if (datacalls) {
         updatedDataCall = datacalls[currentDataCall.cid];
         delete datacalls[currentDataCall.cid];
       }
       if (!updatedDataCall) {
         // If datacalls list is coming from REQUEST_SETUP_DATA_CALL response,
         // we do not change state for any currentDataCalls not in datacalls list.
         if (!newDataCallOptions) {
           delete this.currentDataCalls[currentDataCall.cid];
           currentDataCall.state = GECKO_NETWORK_STATE_DISCONNECTED;
           currentDataCall.rilMessageType = "datacallstatechange";
           this.sendChromeMessage(currentDataCall);
         }
         continue;
       }
       if (updatedDataCall && !updatedDataCall.ifname) {
         delete this.currentDataCalls[currentDataCall.cid];
         currentDataCall.state = GECKO_NETWORK_STATE_UNKNOWN;
         currentDataCall.rilMessageType = "datacallstatechange";
         this.sendChromeMessage(currentDataCall);
         continue;
       }
       this._setDataCallGeckoState(updatedDataCall);
       if (updatedDataCall.state != currentDataCall.state) {
         if (updatedDataCall.state == GECKO_NETWORK_STATE_DISCONNECTED) {
           delete this.currentDataCalls[currentDataCall.cid];
         }
         currentDataCall.status = updatedDataCall.status;
         currentDataCall.active = updatedDataCall.active;
         currentDataCall.state = updatedDataCall.state;
         currentDataCall.rilMessageType = "datacallstatechange";
         this.sendChromeMessage(currentDataCall);
         continue;
       }
       // State not changed, now check links.
       let result =
         this._compareDataCallLink(updatedDataCall, currentDataCall);
       if (result == "identical") {
         if (DEBUG) this.context.debug("No changes in data call.");
         continue;
       }
       if (result == "deactivate") {
         if (DEBUG) this.context.debug("Data link changed, cleanup.");
         this.deactivateDataCall(currentDataCall);
         continue;
       }
       // Minor change, just update and notify.
       if (DEBUG) {
         this.context.debug("Data link minor change, just update and notify.");
       }
       currentDataCall.addresses = updatedDataCall.addresses.slice();
       currentDataCall.dnses = updatedDataCall.dnses.slice();
       currentDataCall.gateways = updatedDataCall.gateways.slice();
       currentDataCall.rilMessageType = "datacallstatechange";
       this.sendChromeMessage(currentDataCall);
     }
     for each (let newDataCall in datacalls) {
       if (!newDataCall.ifname) {
         continue;
       }
       if (!newDataCallOptions) {
         if (DEBUG) {
           this.context.debug("Unexpected new data call: " +
                              JSON.stringify(newDataCall));
         }
         continue;
       }
       this.currentDataCalls[newDataCall.cid] = newDataCall;
       this._setDataCallGeckoState(newDataCall);
       newDataCall.radioTech = newDataCallOptions.radioTech;
       newDataCall.apn = newDataCallOptions.apn;
       newDataCall.user = newDataCallOptions.user;
       newDataCall.passwd = newDataCallOptions.passwd;
       newDataCall.chappap = newDataCallOptions.chappap;
       newDataCall.pdptype = newDataCallOptions.pdptype;
       newDataCallOptions = null;
       newDataCall.rilMessageType = "datacallstatechange";
       this.sendChromeMessage(newDataCall);
     }
   },
   _setDataCallGeckoState: function(datacall) {
     switch (datacall.active) {
       case DATACALL_INACTIVE:
         datacall.state = GECKO_NETWORK_STATE_DISCONNECTED;
         break;
       case DATACALL_ACTIVE_DOWN:
       case DATACALL_ACTIVE_UP:
         datacall.state = GECKO_NETWORK_STATE_CONNECTED;
         break;
     }
   },
   _processSuppSvcNotification: function(info) {
     if (DEBUG) {
       this.context.debug("handle supp svc notification: " + JSON.stringify(info));
     }
     if (info.notificationType !== 1) {
       // We haven't supported MO intermediate result code, i.e.
       // info.notificationType === 0, which refers to code1 defined in 3GPP
       // 27.007 7.17. We only support partial MT unsolicited result code,
       // referring to code2, for now.
       return;
     }
     let notification = null;
     let callIndex = -1;
     switch (info.code) {
       case SUPP_SVC_NOTIFICATION_CODE2_PUT_ON_HOLD:
       case SUPP_SVC_NOTIFICATION_CODE2_RETRIEVED:
         notification = GECKO_SUPP_SVC_NOTIFICATION_FROM_CODE2[info.code];
         break;
       default:
         // Notification type not supported.
         return;
     }
     // Get the target call object for this notification.
     let currentCallIndexes = Object.keys(this.currentCalls);
     if (currentCallIndexes.length === 1) {
       // Only one call exists. This should be the target.
       callIndex = currentCallIndexes[0];
     } else {
       // Find the call in |currentCalls| by the given number.
       if (info.number) {
         for each (let currentCall in this.currentCalls) {
           if (currentCall.number == info.number) {
             callIndex = currentCall.callIndex;
             break;
           }
         }
       }
     }
     let message = {rilMessageType: "suppSvcNotification",
                    notification: notification,
                    callIndex: callIndex};
     this.sendChromeMessage(message);
   },
   _cancelEmergencyCbModeTimeout: function() {
     if (this._exitEmergencyCbModeTimeoutID) {
       clearTimeout(this._exitEmergencyCbModeTimeoutID);
       this._exitEmergencyCbModeTimeoutID = null;
     }
   },
   _handleChangedEmergencyCbMode: function(active) {
     this._isInEmergencyCbMode = active;
     // Clear the existed timeout event.
     this._cancelEmergencyCbModeTimeout();
     // Start a new timeout event when entering the mode.
     if (active) {
       this._exitEmergencyCbModeTimeoutID = setTimeout(
           this.exitEmergencyCbMode.bind(this), EMERGENCY_CB_MODE_TIMEOUT_MS);
     }
     let message = {rilMessageType: "emergencyCbModeChange",
                    active: active,
                    timeoutMs: EMERGENCY_CB_MODE_TIMEOUT_MS};
     this.sendChromeMessage(message);
   },
   _processNetworks: function() {
     let strings = this.context.Buf.readStringList();
     let networks = [];
     for (let i = 0; i < strings.length; i += 4) {
       let network = {
         longName: strings[i],
         shortName: strings[i + 1],
         mcc: null,
         mnc: null,
         state: null
       };
       let networkTuple = strings[i + 2];
       try {
         this._processNetworkTuple(networkTuple, network);
       } catch (e) {
         if (DEBUG) this.context.debug("Error processing operator tuple: " + e);
       }
       let state = strings[i + 3];
       if (state === NETWORK_STATE_UNKNOWN) {
         // TODO: looks like this might conflict in style with
         // GECKO_NETWORK_STYLE_UNKNOWN / nsINetworkManager
         state = GECKO_QAN_STATE_UNKNOWN;
       }
       network.state = state;
       networks.push(network);
     }
     return networks;
   },
   /**
    * The "numeric" portion of the operator info is a tuple
    * containing MCC (country code) and MNC (network code).
    * AFAICT, MCC should always be 3 digits, making the remaining
    * portion the MNC.
    */
   _processNetworkTuple: function(networkTuple, network) {
     let tupleLen = networkTuple.length;
     if (tupleLen == 5 || tupleLen == 6) {
       network.mcc = networkTuple.substr(0, 3);
       network.mnc = networkTuple.substr(3);
     } else {
       network.mcc = null;
       network.mnc = null;
       throw new Error("Invalid network tuple (should be 5 or 6 digits): " + networkTuple);
     }
   },
   /**
    * Check if GSM radio access technology group.
    */
   _isGsmTechGroup: function(radioTech) {
     if (!radioTech) {
       return true;
     }
     switch(radioTech) {
       case NETWORK_CREG_TECH_GPRS:
       case NETWORK_CREG_TECH_EDGE:
       case NETWORK_CREG_TECH_UMTS:
       case NETWORK_CREG_TECH_HSDPA:
       case NETWORK_CREG_TECH_HSUPA:
       case NETWORK_CREG_TECH_HSPA:
       case NETWORK_CREG_TECH_LTE:
       case NETWORK_CREG_TECH_HSPAP:
       case NETWORK_CREG_TECH_GSM:
         return true;
     }
     return false;
   },
   /**
    * Process radio technology change.
    */
   _processRadioTech: function(radioTech) {
     let isCdma = !this._isGsmTechGroup(radioTech);
     this.radioTech = radioTech;
     if (DEBUG) {
       this.context.debug("Radio tech is set to: " + GECKO_RADIO_TECH[radioTech] +
                          ", it is a " + (isCdma?"cdma":"gsm") + " technology");
     }
     // We should request SIM information when
     //  1. Radio state has been changed, so we are waiting for radioTech or
     //  2. isCdma is different from this._isCdma.
     if (this._waitingRadioTech || isCdma != this._isCdma) {
       this._isCdma = isCdma;
       this._waitingRadioTech = false;
       if (this._isCdma) {
         this.getDeviceIdentity();
       } else {
         this.getIMEI();
         this.getIMEISV();
       }
       this.getICCStatus();
     }
   },
   /**
    * Helper for returning the TOA for the given dial string.
    */
   _toaFromString: function(number) {
     let toa = TOA_UNKNOWN;
     if (number && number.length > 0 && number[0] == '+') {
       toa = TOA_INTERNATIONAL;
     }
     return toa;
   },
   /**
    * Helper for translating basic service group to call forwarding service class
    * parameter.
    */
   _siToServiceClass: function(si) {
     if (!si) {
       return ICC_SERVICE_CLASS_NONE;
     }
     let serviceCode = parseInt(si, 10);
     switch (serviceCode) {
       case 10:
         return ICC_SERVICE_CLASS_SMS + ICC_SERVICE_CLASS_FAX  + ICC_SERVICE_CLASS_VOICE;
       case 11:
         return ICC_SERVICE_CLASS_VOICE;
       case 12:
         return ICC_SERVICE_CLASS_SMS + ICC_SERVICE_CLASS_FAX;
       case 13:
         return ICC_SERVICE_CLASS_FAX;
       case 16:
         return ICC_SERVICE_CLASS_SMS;
       case 19:
         return ICC_SERVICE_CLASS_FAX + ICC_SERVICE_CLASS_VOICE;
       case 21:
         return ICC_SERVICE_CLASS_PAD + ICC_SERVICE_CLASS_DATA_ASYNC;
       case 22:
         return ICC_SERVICE_CLASS_PACKET + ICC_SERVICE_CLASS_DATA_SYNC;
       case 25:
         return ICC_SERVICE_CLASS_DATA_ASYNC;
       case 26:
         return ICC_SERVICE_CLASS_DATA_SYNC + SERVICE_CLASS_VOICE;
       case 99:
         return ICC_SERVICE_CLASS_PACKET;
       default:
         return ICC_SERVICE_CLASS_NONE;
     }
   },
   /**
    * @param message A decoded SMS-DELIVER message.
    *
    * @see 3GPP TS 31.111 section 7.1.1
    */
   dataDownloadViaSMSPP: function(message) {
     let Buf = this.context.Buf;
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let options = {
       pid: message.pid,
       dcs: message.dcs,
       encoding: message.encoding,
     };
     Buf.newParcel(REQUEST_STK_SEND_ENVELOPE_WITH_STATUS, options);
     Buf.seekIncoming(-1 * (Buf.getCurrentParcelSize() - Buf.getReadAvailable()
                            - 2 * Buf.UINT32_SIZE)); // Skip response_type & request_type.
     let messageStringLength = Buf.readInt32(); // In semi-octets
     let smscLength = GsmPDUHelper.readHexOctet(); // In octets, inclusive of TOA
     let tpduLength = (messageStringLength / 2) - (smscLength + 1); // In octets
     // Device identities: 4 bytes
     // Address: 0 or (2 + smscLength)
     // SMS TPDU: (2 or 3) + tpduLength
     let berLen = 4 +
                  (smscLength ? (2 + smscLength) : 0) +
                  (tpduLength <= 127 ? 2 : 3) + tpduLength; // In octets
     let parcelLength = (berLen <= 127 ? 2 : 3) + berLen; // In octets
     Buf.writeInt32(parcelLength * 2); // In semi-octets
     // Write a BER-TLV
     GsmPDUHelper.writeHexOctet(BER_SMS_PP_DOWNLOAD_TAG);
     if (berLen > 127) {
       GsmPDUHelper.writeHexOctet(0x81);
     }
     GsmPDUHelper.writeHexOctet(berLen);
     // Device Identifies-TLV
     GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_DEVICE_ID |
                                COMPREHENSIONTLV_FLAG_CR);
     GsmPDUHelper.writeHexOctet(0x02);
     GsmPDUHelper.writeHexOctet(STK_DEVICE_ID_NETWORK);
     GsmPDUHelper.writeHexOctet(STK_DEVICE_ID_SIM);
     // Address-TLV
     if (smscLength) {
       GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_ADDRESS);
       GsmPDUHelper.writeHexOctet(smscLength);
       Buf.copyIncomingToOutgoing(Buf.PDU_HEX_OCTET_SIZE * smscLength);
     }
     // SMS TPDU-TLV
     GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_SMS_TPDU |
                                COMPREHENSIONTLV_FLAG_CR);
     if (tpduLength > 127) {
       GsmPDUHelper.writeHexOctet(0x81);
     }
     GsmPDUHelper.writeHexOctet(tpduLength);
     Buf.copyIncomingToOutgoing(Buf.PDU_HEX_OCTET_SIZE * tpduLength);
     // Write 2 string delimitors for the total string length must be even.
     Buf.writeStringDelimiter(0);
     Buf.sendParcel();
   },
   /**
    * @param success A boolean value indicating the result of previous
    *                SMS-DELIVER message handling.
    * @param responsePduLen ICC IO response PDU length in octets.
    * @param options An object that contains four attributes: `pid`, `dcs`,
    *                `encoding` and `responsePduLen`.
    *
    * @see 3GPP TS 23.040 section 9.2.2.1a
    */
   acknowledgeIncomingGsmSmsWithPDU: function(success, responsePduLen, options) {
     let Buf = this.context.Buf;
     let GsmPDUHelper = this.context.GsmPDUHelper;
     Buf.newParcel(REQUEST_ACKNOWLEDGE_INCOMING_GSM_SMS_WITH_PDU);
     // Two strings.
     Buf.writeInt32(2);
     // String 1: Success
     Buf.writeString(success ? "1" : "0");
     // String 2: RP-ACK/RP-ERROR PDU
     Buf.writeInt32(2 * (responsePduLen + (success ? 5 : 6))); // In semi-octet
     // 1. TP-MTI & TP-UDHI
     GsmPDUHelper.writeHexOctet(PDU_MTI_SMS_DELIVER);
     if (!success) {
       // 2. TP-FCS
       GsmPDUHelper.writeHexOctet(PDU_FCS_USIM_DATA_DOWNLOAD_ERROR);
     }
     // 3. TP-PI
     GsmPDUHelper.writeHexOctet(PDU_PI_USER_DATA_LENGTH |
                                PDU_PI_DATA_CODING_SCHEME |
                                PDU_PI_PROTOCOL_IDENTIFIER);
     // 4. TP-PID
     GsmPDUHelper.writeHexOctet(options.pid);
     // 5. TP-DCS
     GsmPDUHelper.writeHexOctet(options.dcs);
     // 6. TP-UDL
     if (options.encoding == PDU_DCS_MSG_CODING_7BITS_ALPHABET) {
       GsmPDUHelper.writeHexOctet(Math.floor(responsePduLen * 8 / 7));
     } else {
       GsmPDUHelper.writeHexOctet(responsePduLen);
     }
     // TP-UD
     Buf.copyIncomingToOutgoing(Buf.PDU_HEX_OCTET_SIZE * responsePduLen);
     // Write 2 string delimitors for the total string length must be even.
     Buf.writeStringDelimiter(0);
     Buf.sendParcel();
   },
   /**
    * @param message A decoded SMS-DELIVER message.
    */
   writeSmsToSIM: function(message) {
     let Buf = this.context.Buf;
     let GsmPDUHelper = this.context.GsmPDUHelper;
     Buf.newParcel(REQUEST_WRITE_SMS_TO_SIM);
     // Write EFsms Status
     Buf.writeInt32(EFSMS_STATUS_FREE);
     Buf.seekIncoming(-1 * (Buf.getCurrentParcelSize() - Buf.getReadAvailable()
                            - 2 * Buf.UINT32_SIZE)); // Skip response_type & request_type.
     let messageStringLength = Buf.readInt32(); // In semi-octets
     let smscLength = GsmPDUHelper.readHexOctet(); // In octets, inclusive of TOA
     let pduLength = (messageStringLength / 2) - (smscLength + 1); // In octets
     // 1. Write PDU first.
     if (smscLength > 0) {
       Buf.seekIncoming(smscLength * Buf.PDU_HEX_OCTET_SIZE);
     }
     // Write EFsms PDU string length
     Buf.writeInt32(2 * pduLength); // In semi-octets
     if (pduLength) {
       Buf.copyIncomingToOutgoing(Buf.PDU_HEX_OCTET_SIZE * pduLength);
     }
     // Write 2 string delimitors for the total string length must be even.
     Buf.writeStringDelimiter(0);
     // 2. Write SMSC
     // Write EFsms SMSC string length
     Buf.writeInt32(2 * (smscLength + 1)); // Plus smscLength itself, in semi-octets
     // Write smscLength
     GsmPDUHelper.writeHexOctet(smscLength);
     // Write TOA & SMSC Address
     if (smscLength) {
       Buf.seekIncoming(-1 * (Buf.getCurrentParcelSize() - Buf.getReadAvailable()
                              - 2 * Buf.UINT32_SIZE // Skip response_type, request_type.
                              - 2 * Buf.PDU_HEX_OCTET_SIZE)); // Skip messageStringLength & smscLength.
       Buf.copyIncomingToOutgoing(Buf.PDU_HEX_OCTET_SIZE * smscLength);
     }
     // Write 2 string delimitors for the total string length must be even.
     Buf.writeStringDelimiter(0);
     Buf.sendParcel();
   },
   /**
    * Helper to delegate the received sms segment to RadioInterface to process.
    *
    * @param message
    *        Received sms message.
    *
    * @return MOZ_FCS_WAIT_FOR_EXPLICIT_ACK
    */
   _processSmsMultipart: function(message) {
     message.rilMessageType = "sms-received";
     this.sendChromeMessage(message);
     return MOZ_FCS_WAIT_FOR_EXPLICIT_ACK;
   },
   /**
    * Helper for processing SMS-STATUS-REPORT PDUs.
    *
    * @param length
    *        Length of SMS string in the incoming parcel.
    *
    * @return A failure cause defined in 3GPP 23.040 clause 9.2.3.22.
    */
   _processSmsStatusReport: function(length) {
     let [message, result] = this.context.GsmPDUHelper.processReceivedSms(length);
     if (!message) {
       if (DEBUG) this.context.debug("invalid SMS-STATUS-REPORT");
       return PDU_FCS_UNSPECIFIED;
     }
     let options = this._pendingSentSmsMap[message.messageRef];
     if (!options) {
       if (DEBUG) this.context.debug("no pending SMS-SUBMIT message");
       return PDU_FCS_OK;
     }
     let status = message.status;
     // 3GPP TS 23.040 9.2.3.15 `The MS shall interpret any reserved values as
     // "Service Rejected"(01100011) but shall store them exactly as received.`
     if ((status >= 0x80)
         || ((status >= PDU_ST_0_RESERVED_BEGIN)
             && (status < PDU_ST_0_SC_SPECIFIC_BEGIN))
         || ((status >= PDU_ST_1_RESERVED_BEGIN)
             && (status < PDU_ST_1_SC_SPECIFIC_BEGIN))
         || ((status >= PDU_ST_2_RESERVED_BEGIN)
             && (status < PDU_ST_2_SC_SPECIFIC_BEGIN))
         || ((status >= PDU_ST_3_RESERVED_BEGIN)
             && (status < PDU_ST_3_SC_SPECIFIC_BEGIN))
         ) {
       status = PDU_ST_3_SERVICE_REJECTED;
     }
     // Pending. Waiting for next status report.
     if ((status >>> 5) == 0x01) {
       if (DEBUG) this.context.debug("SMS-STATUS-REPORT: delivery still pending");
       return PDU_FCS_OK;
     }
     delete this._pendingSentSmsMap[message.messageRef];
     let deliveryStatus = ((status >>> 5) === 0x00)
                        ? GECKO_SMS_DELIVERY_STATUS_SUCCESS
                        : GECKO_SMS_DELIVERY_STATUS_ERROR;
     this.sendChromeMessage({
       rilMessageType: options.rilMessageType,
       rilMessageToken: options.rilMessageToken,
       deliveryStatus: deliveryStatus
     });
     return PDU_FCS_OK;
   },
   /**
    * Helper for processing CDMA SMS Delivery Acknowledgment Message
    *
    * @param message
    *        decoded SMS Delivery ACK message from CdmaPDUHelper.
    *
    * @return A failure cause defined in 3GPP 23.040 clause 9.2.3.22.
    */
   _processCdmaSmsStatusReport: function(message) {
     let options = this._pendingSentSmsMap[message.msgId];
     if (!options) {
       if (DEBUG) this.context.debug("no pending SMS-SUBMIT message");
       return PDU_FCS_OK;
     }
     if (message.errorClass === 2) {
       if (DEBUG) {
         this.context.debug("SMS-STATUS-REPORT: delivery still pending, " +
                            "msgStatus: " + message.msgStatus);
       }
       return PDU_FCS_OK;
     }
     delete this._pendingSentSmsMap[message.msgId];
     if (message.errorClass === -1 && message.body) {
       // Process as normal incoming SMS, if errorClass is invalid
       // but message body is available.
       return this._processSmsMultipart(message);
     }
     let deliveryStatus = (message.errorClass === 0)
                        ? GECKO_SMS_DELIVERY_STATUS_SUCCESS
                        : GECKO_SMS_DELIVERY_STATUS_ERROR;
     this.sendChromeMessage({
       rilMessageType: options.rilMessageType,
       rilMessageToken: options.rilMessageToken,
       deliveryStatus: deliveryStatus
     });
     return PDU_FCS_OK;
   },
   /**
    * Helper for processing CDMA SMS WAP Push Message
    *
    * @param message
    *        decoded WAP message from CdmaPDUHelper.
    *
    * @return A failure cause defined in 3GPP 23.040 clause 9.2.3.22.
    */
   _processCdmaSmsWapPush: function(message) {
     if (!message.data) {
       if (DEBUG) this.context.debug("no data inside WAP Push message.");
       return PDU_FCS_OK;
     }
     // See 6.5. MAPPING OF WDP TO CDMA SMS in WAP-295-WDP.
     //
     // Field             | Length (bits)
     // -----------------------------------------
     // MSG_TYPE          | 8
     // TOTAL_SEGMENTS    | 8
     // SEGMENT_NUMBER    | 8
     // DATAGRAM          | (NUM_FIELDS – 3) * 8
     let index = 0;
     if (message.data[index++] !== 0) {
       if (DEBUG) this.context.debug("Ignore a WAP Message which is not WDP.");
       return PDU_FCS_OK;
     }
     // 1. Originator Address in SMS-TL + Message_Id in SMS-TS are used to identify a unique WDP datagram.
     // 2. TOTAL_SEGMENTS, SEGMENT_NUMBER are used to verify that a complete
     //    datagram has been received and is ready to be passed to a higher layer.
     message.header = {
       segmentRef:     message.msgId,
       segmentMaxSeq:  message.data[index++],
       segmentSeq:     message.data[index++] + 1 // It's zero-based in CDMA WAP Push.
     };
     if (message.header.segmentSeq > message.header.segmentMaxSeq) {
       if (DEBUG) this.context.debug("Wrong WDP segment info.");
       return PDU_FCS_OK;
     }
     // Ports are only specified in 1st segment.
     if (message.header.segmentSeq == 1) {
       message.header.originatorPort = message.data[index++] << 8;
       message.header.originatorPort |= message.data[index++];
       message.header.destinationPort = message.data[index++] << 8;
       message.header.destinationPort |= message.data[index++];
     }
     message.data = message.data.subarray(index);
     return this._processSmsMultipart(message);
   },
   /**
    * Helper for processing sent multipart SMS.
    */
   _processSentSmsSegment: function(options) {
     // Setup attributes for sending next segment
     let next = options.segmentSeq;
     options.body = options.segments[next].body;
     options.encodedBodyLength = options.segments[next].encodedBodyLength;
     options.segmentSeq = next + 1;
     this.sendSMS(options);
   },
   /**
    * Helper for processing result of send SMS.
    *
    * @param length
    *        Length of SMS string in the incoming parcel.
    * @param options
    *        Sms information.
    */
   _processSmsSendResult: function(length, options) {
     if (options.rilRequestError) {
       if (DEBUG) {
         this.context.debug("_processSmsSendResult: rilRequestError = " +
                            options.rilRequestError);
       }
       switch (options.rilRequestError) {
         case ERROR_SMS_SEND_FAIL_RETRY:
           if (options.retryCount < SMS_RETRY_MAX) {
             options.retryCount++;
             // TODO: bug 736702 TP-MR, retry interval, retry timeout
             this.sendSMS(options);
             break;
           }
           // Fallback to default error handling if it meets max retry count.
           // Fall through.
         default:
           this.sendChromeMessage({
             rilMessageType: options.rilMessageType,
             rilMessageToken: options.rilMessageToken,
             errorMsg: options.rilRequestError,
           });
           break;
       }
       return;
     }
     let Buf = this.context.Buf;
     options.messageRef = Buf.readInt32();
     options.ackPDU = Buf.readString();
     options.errorCode = Buf.readInt32();
     if ((options.segmentMaxSeq > 1)
         && (options.segmentSeq < options.segmentMaxSeq)) {
       // Not last segment
       this._processSentSmsSegment(options);
     } else {
       // Last segment sent with success.
       if (options.requestStatusReport) {
         if (DEBUG) {
           this.context.debug("waiting SMS-STATUS-REPORT for messageRef " +
                              options.messageRef);
         }
         this._pendingSentSmsMap[options.messageRef] = options;
       }
       this.sendChromeMessage({
         rilMessageType: options.rilMessageType,
         rilMessageToken: options.rilMessageToken,
       });
     }
   },
   _processReceivedSmsCbPage: function(original) {
     if (original.numPages <= 1) {
       if (original.body) {
         original.fullBody = original.body;
         delete original.body;
       } else if (original.data) {
         original.fullData = original.data;
         delete original.data;
       }
       return original;
     }
     // Hash = <serial>:<mcc>:<mnc>:<lac>:<cid>
     let hash = original.serial + ":" + this.iccInfo.mcc + ":"
                + this.iccInfo.mnc + ":";
     switch (original.geographicalScope) {
       case CB_GSM_GEOGRAPHICAL_SCOPE_CELL_WIDE_IMMEDIATE:
       case CB_GSM_GEOGRAPHICAL_SCOPE_CELL_WIDE:
         hash += this.voiceRegistrationState.cell.gsmLocationAreaCode + ":"
              + this.voiceRegistrationState.cell.gsmCellId;
         break;
       case CB_GSM_GEOGRAPHICAL_SCOPE_LOCATION_AREA_WIDE:
         hash += this.voiceRegistrationState.cell.gsmLocationAreaCode + ":";
         break;
       default:
         hash += ":";
         break;
     }
     let index = original.pageIndex;
     let options = this._receivedSmsCbPagesMap[hash];
     if (!options) {
       options = original;
       this._receivedSmsCbPagesMap[hash] = options;
       options.receivedPages = 0;
       options.pages = [];
     } else if (options.pages[index]) {
       // Duplicated page?
       if (DEBUG) {
         this.context.debug("Got duplicated page no." + index +
                            " of a multipage SMSCB: " + JSON.stringify(original));
       }
       return null;
     }
     if (options.encoding == PDU_DCS_MSG_CODING_8BITS_ALPHABET) {
       options.pages[index] = original.data;
       delete original.data;
     } else {
       options.pages[index] = original.body;
       delete original.body;
     }
     options.receivedPages++;
     if (options.receivedPages < options.numPages) {
       if (DEBUG) {
         this.context.debug("Got page no." + index + " of a multipage SMSCB: " +
                            JSON.stringify(options));
       }
       return null;
     }
     // Remove from map
     delete this._receivedSmsCbPagesMap[hash];
     // Rebuild full body
     if (options.encoding == PDU_DCS_MSG_CODING_8BITS_ALPHABET) {
       // Uint8Array doesn't have `concat`, so we have to merge all pages by hand.
       let fullDataLen = 0;
       for (let i = 1; i <= options.numPages; i++) {
         fullDataLen += options.pages[i].length;
       }
       options.fullData = new Uint8Array(fullDataLen);
       for (let d= 0, i = 1; i <= options.numPages; i++) {
         let data = options.pages[i];
         for (let j = 0; j < data.length; j++) {
           options.fullData[d++] = data[j];
         }
       }
     } else {
       options.fullBody = options.pages.join("");
     }
     if (DEBUG) {
       this.context.debug("Got full multipage SMSCB: " + JSON.stringify(options));
     }
     return options;
   },
   _mergeCellBroadcastConfigs: function(list, from, to) {
     if (!list) {
       return [from, to];
     }
     for (let i = 0, f1, t1; i < list.length;) {
       f1 = list[i++];
       t1 = list[i++];
       if (to == f1) {
         // ...[from]...[to|f1]...(t1)
         list[i - 2] = from;
         return list;
       }
       if (to < f1) {
         // ...[from]...(to)...[f1] or ...[from]...(to)[f1]
         if (i > 2) {
           // Not the first range pair, merge three arrays.
           return list.slice(0, i - 2).concat([from, to]).concat(list.slice(i - 2));
         } else {
           return [from, to].concat(list);
         }
       }
       if (from > t1) {
         // ...[f1]...(t1)[from] or ...[f1]...(t1)...[from]
         continue;
       }
       // Have overlap or merge-able adjacency with [f1]...(t1). Replace it
       // with [min(from, f1)]...(max(to, t1)).
       let changed = false;
       if (from < f1) {
         // [from]...[f1]...(t1) or [from][f1]...(t1)
         // Save minimum from value.
         list[i - 2] = from;
         changed = true;
       }
       if (to <= t1) {
         // [from]...[to](t1) or [from]...(to|t1)
         // Can't have further merge-able adjacency. Return.
         return list;
       }
       // Try merging possible next adjacent range.
       let j = i;
       for (let f2, t2; j < list.length;) {
         f2 = list[j++];
         t2 = list[j++];
         if (to > t2) {
           // [from]...[f2]...[t2]...(to) or [from]...[f2]...[t2](to)
           // Merge next adjacent range again.
           continue;
         }
         if (to < t2) {
           if (to < f2) {
             // [from]...(to)[f2] or [from]...(to)...[f2]
             // Roll back and give up.
             j -= 2;
           } else if (to < t2) {
             // [from]...[to|f2]...(t2), or [from]...[f2]...[to](t2)
             // Merge to [from]...(t2) and give up.
             to = t2;
           }
         }
         break;
       }
       // Save maximum to value.
       list[i - 1] = to;
       if (j != i) {
         // Remove merged adjacent ranges.
         let ret = list.slice(0, i);
         if (j < list.length) {
           ret = ret.concat(list.slice(j));
         }
         return ret;
       }
       return list;
     }
     // Append to the end.
     list.push(from);
     list.push(to);
     return list;
   },
   _isCellBroadcastConfigReady: function() {
     if (!("MMI" in this.cellBroadcastConfigs)) {
       return false;
     }
     // CBMI should be ready in GSM.
     if (!this._isCdma &&
         (!("CBMI" in this.cellBroadcastConfigs) ||
          !("CBMID" in this.cellBroadcastConfigs) ||
          !("CBMIR" in this.cellBroadcastConfigs))) {
       return false;
     }
     return true;
   },
   /**
    * Merge all members of cellBroadcastConfigs into mergedCellBroadcastConfig.
    */
   _mergeAllCellBroadcastConfigs: function() {
     if (!this._isCellBroadcastConfigReady()) {
       if (DEBUG) {
         this.context.debug("cell broadcast configs not ready, waiting ...");
       }
       return;
     }
     // Prepare cell broadcast config. CBMI* are only used in GSM.
     let usedCellBroadcastConfigs = {MMI: this.cellBroadcastConfigs.MMI};
     if (!this._isCdma) {
       usedCellBroadcastConfigs.CBMI = this.cellBroadcastConfigs.CBMI;
       usedCellBroadcastConfigs.CBMID = this.cellBroadcastConfigs.CBMID;
       usedCellBroadcastConfigs.CBMIR = this.cellBroadcastConfigs.CBMIR;
     }
     if (DEBUG) {
       this.context.debug("Cell Broadcast search lists: " +
                          JSON.stringify(usedCellBroadcastConfigs));
     }
     let list = null;
     for each (let ll in usedCellBroadcastConfigs) {
       if (ll == null) {
         continue;
       }
       for (let i = 0; i < ll.length; i += 2) {
         list = this._mergeCellBroadcastConfigs(list, ll[i], ll[i + 1]);
       }
     }
     if (DEBUG) {
       this.context.debug("Cell Broadcast search lists(merged): " +
                          JSON.stringify(list));
     }
     this.mergedCellBroadcastConfig = list;
     this.updateCellBroadcastConfig();
   },
   /**
    * Check whether search list from settings is settable by MMI, that is,
    * whether the range is bounded in any entries of CB_NON_MMI_SETTABLE_RANGES.
    */
   _checkCellBroadcastMMISettable: function(from, to) {
     if ((to <= from) || (from >= 65536) || (from < 0)) {
       return false;
     }
     if (!this._isCdma) {
       // GSM not settable ranges.
       for (let i = 0, f, t; i < CB_NON_MMI_SETTABLE_RANGES.length;) {
         f = CB_NON_MMI_SETTABLE_RANGES[i++];
         t = CB_NON_MMI_SETTABLE_RANGES[i++];
         if ((from < t) && (to > f)) {
           // Have overlap.
           return false;
         }
       }
     }
     return true;
   },
   /**
    * Convert Cell Broadcast settings string into search list.
    */
   _convertCellBroadcastSearchList: function(searchListStr) {
     let parts = searchListStr && searchListStr.split(",");
     if (!parts) {
       return null;
     }
     let list = null;
     let result, from, to;
     for (let range of parts) {
       // Match "12" or "12-34". The result will be ["12", "12", null] or
       // ["12-34", "12", "34"].
       result = range.match(/^(\d+)(?:-(\d+))?$/);
       if (!result) {
         throw "Invalid format";
       }
       from = parseInt(result[1], 10);
       to = (result[2]) ? parseInt(result[2], 10) + 1 : from + 1;
       if (!this._checkCellBroadcastMMISettable(from, to)) {
         throw "Invalid range";
       }
       if (list == null) {
         list = [];
       }
       list.push(from);
       list.push(to);
     }
     return list;
   },
   /**
    * Handle incoming messages from the main UI thread.
    *
    * @param message
    *        Object containing the message. Messages are supposed
    */
   handleChromeMessage: function(message) {
     if (DEBUG) {
       this.context.debug("Received chrome message " + JSON.stringify(message));
     }
     let method = this[message.rilMessageType];
     if (typeof method != "function") {
       if (DEBUG) {
         this.context.debug("Don't know what to do with message " +
                            JSON.stringify(message));
       }
       return;
     }
     method.call(this, message);
   },
   /**
    * Get a list of current voice calls.
    */
   enumerateCalls: function(options) {
     if (DEBUG) this.context.debug("Sending all current calls");
     let calls = [];
     for each (let call in this.currentCalls) {
       calls.push(call);
     }
     options.calls = calls;
     this.sendChromeMessage(options);
   },
   /**
    * Process STK Proactive Command.
    */
   processStkProactiveCommand: function() {
     let Buf = this.context.Buf;
     let length = Buf.readInt32();
     let berTlv;
     try {
       berTlv = this.context.BerTlvHelper.decode(length / 2);
     } catch (e) {
       if (DEBUG) this.context.debug("processStkProactiveCommand : " + e);
       this.sendStkTerminalResponse({
         resultCode: STK_RESULT_CMD_DATA_NOT_UNDERSTOOD});
       return;
     }
     Buf.readStringDelimiter(length);
     let ctlvs = berTlv.value;
     let ctlv = this.context.StkProactiveCmdHelper.searchForTag(
         COMPREHENSIONTLV_TAG_COMMAND_DETAILS, ctlvs);
     if (!ctlv) {
       this.sendStkTerminalResponse({
         resultCode: STK_RESULT_CMD_DATA_NOT_UNDERSTOOD});
       throw new Error("Can't find COMMAND_DETAILS ComprehensionTlv");
     }
     let cmdDetails = ctlv.value;
     if (DEBUG) {
       this.context.debug("commandNumber = " + cmdDetails.commandNumber +
                          " typeOfCommand = " + cmdDetails.typeOfCommand.toString(16) +
                          " commandQualifier = " + cmdDetails.commandQualifier);
     }
     // STK_CMD_MORE_TIME need not to propagate event to chrome.
     if (cmdDetails.typeOfCommand == STK_CMD_MORE_TIME) {
       this.sendStkTerminalResponse({
         command: cmdDetails,
         resultCode: STK_RESULT_OK});
       return;
     }
     cmdDetails.rilMessageType = "stkcommand";
     cmdDetails.options =
       this.context.StkCommandParamsFactory.createParam(cmdDetails, ctlvs);
     this.sendChromeMessage(cmdDetails);
   },
   /**
    * Send messages to the main thread.
    */
   sendChromeMessage: function(message) {
     message.rilMessageClientId = this.context.clientId;
     postMessage(message);
   },
   /**
    * Handle incoming requests from the RIL. We find the method that
    * corresponds to the request type. Incidentally, the request type
    * _is_ the method name, so that's easy.
    */
   handleParcel: function(request_type, length, options) {
     let method = this[request_type];
     if (typeof method == "function") {
       if (DEBUG) this.context.debug("Handling parcel as " + method.name);
       method.call(this, length, options);
     }
   }
 };
 RilObject.prototype[REQUEST_GET_SIM_STATUS] = function REQUEST_GET_SIM_STATUS(length, options) {
   if (options.rilRequestError) {
     return;
   }
   let iccStatus = {};
   let Buf = this.context.Buf;
   iccStatus.cardState = Buf.readInt32(); // CARD_STATE_*
   iccStatus.universalPINState = Buf.readInt32(); // CARD_PINSTATE_*
   iccStatus.gsmUmtsSubscriptionAppIndex = Buf.readInt32();
   iccStatus.cdmaSubscriptionAppIndex = Buf.readInt32();
   if (!this.v5Legacy) {
     iccStatus.imsSubscriptionAppIndex = Buf.readInt32();
   }
   let apps_length = Buf.readInt32();
   if (apps_length > CARD_MAX_APPS) {
     apps_length = CARD_MAX_APPS;
   }
   iccStatus.apps = [];
   for (let i = 0 ; i < apps_length ; i++) {
     iccStatus.apps.push({
       app_type:       Buf.readInt32(), // CARD_APPTYPE_*
       app_state:      Buf.readInt32(), // CARD_APPSTATE_*
       perso_substate: Buf.readInt32(), // CARD_PERSOSUBSTATE_*
       aid:            Buf.readString(),
       app_label:      Buf.readString(),
       pin1_replaced:  Buf.readInt32(),
       pin1:           Buf.readInt32(),
       pin2:           Buf.readInt32()
     });
     if (RILQUIRKS_SIM_APP_STATE_EXTRA_FIELDS) {
       Buf.readInt32();
       Buf.readInt32();
       Buf.readInt32();
       Buf.readInt32();
     }
   }
   if (DEBUG) this.context.debug("iccStatus: " + JSON.stringify(iccStatus));
   this._processICCStatus(iccStatus);
 };
 RilObject.prototype[REQUEST_ENTER_SIM_PIN] = function REQUEST_ENTER_SIM_PIN(length, options) {
   this._processEnterAndChangeICCResponses(length, options);
 };
 RilObject.prototype[REQUEST_ENTER_SIM_PUK] = function REQUEST_ENTER_SIM_PUK(length, options) {
   this._processEnterAndChangeICCResponses(length, options);
 };
 RilObject.prototype[REQUEST_ENTER_SIM_PIN2] = function REQUEST_ENTER_SIM_PIN2(length, options) {
   this._processEnterAndChangeICCResponses(length, options);
 };
 RilObject.prototype[REQUEST_ENTER_SIM_PUK2] = function REQUEST_ENTER_SIM_PUK(length, options) {
   this._processEnterAndChangeICCResponses(length, options);
 };
 RilObject.prototype[REQUEST_CHANGE_SIM_PIN] = function REQUEST_CHANGE_SIM_PIN(length, options) {
   this._processEnterAndChangeICCResponses(length, options);
 };
 RilObject.prototype[REQUEST_CHANGE_SIM_PIN2] = function REQUEST_CHANGE_SIM_PIN2(length, options) {
   this._processEnterAndChangeICCResponses(length, options);
 };
 RilObject.prototype[REQUEST_ENTER_NETWORK_DEPERSONALIZATION_CODE] =
   function REQUEST_ENTER_NETWORK_DEPERSONALIZATION_CODE(length, options) {
   this._processEnterAndChangeICCResponses(length, options);
 };
 RilObject.prototype[REQUEST_GET_CURRENT_CALLS] = function REQUEST_GET_CURRENT_CALLS(length, options) {
   if (options.rilRequestError) {
     return;
   }
   let Buf = this.context.Buf;
   let calls_length = 0;
   // The RIL won't even send us the length integer if there are no active calls.
   // So only read this integer if the parcel actually has it.
   if (length) {
     calls_length = Buf.readInt32();
   }
   if (!calls_length) {
     this._processCalls(null);
     return;
   }
   let calls = {};
   for (let i = 0; i < calls_length; i++) {
     let call = {};
     // Extra uint32 field to get correct callIndex and rest of call data for
     // call waiting feature.
     if (RILQUIRKS_EXTRA_UINT32_2ND_CALL && i > 0) {
       Buf.readInt32();
     }
     call.state          = Buf.readInt32(); // CALL_STATE_*
     call.callIndex      = Buf.readInt32(); // GSM index (1-based)
     call.toa            = Buf.readInt32();
     call.isMpty         = Boolean(Buf.readInt32());
     call.isMT           = Boolean(Buf.readInt32());
     call.als            = Buf.readInt32();
     call.isVoice        = Boolean(Buf.readInt32());
     call.isVoicePrivacy = Boolean(Buf.readInt32());
     if (RILQUIRKS_CALLSTATE_EXTRA_UINT32) {
       Buf.readInt32();
     }
     call.number             = Buf.readString(); //TODO munge with TOA
     call.numberPresentation = Buf.readInt32(); // CALL_PRESENTATION_*
     call.name               = Buf.readString();
     call.namePresentation   = Buf.readInt32();
     call.uusInfo = null;
     let uusInfoPresent = Buf.readInt32();
     if (uusInfoPresent == 1) {
       call.uusInfo = {
         type:     Buf.readInt32(),
         dcs:      Buf.readInt32(),
         userData: null //XXX TODO byte array?!?
       };
     }
     calls[call.callIndex] = call;
   }
   this._processCalls(calls);
 };
 RilObject.prototype[REQUEST_DIAL] = function REQUEST_DIAL(length, options) {
   // We already return a successful response before. Don't respond it again!
   if (options.rilRequestError) {
     this.getFailCauseCode((function(failCause) {
       this._removePendingOutgoingCall(failCause);
     }).bind(this));
   }
 };
 RilObject.prototype[REQUEST_DIAL_EMERGENCY_CALL] = RilObject.prototype[REQUEST_DIAL];
 RilObject.prototype[REQUEST_GET_IMSI] = function REQUEST_GET_IMSI(length, options) {
   if (options.rilRequestError) {
     return;
   }
   this.iccInfoPrivate.imsi = this.context.Buf.readString();
   if (DEBUG) {
     this.context.debug("IMSI: " + this.iccInfoPrivate.imsi);
   }
   options.rilMessageType = "iccimsi";
   options.imsi = this.iccInfoPrivate.imsi;
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_HANGUP] = function REQUEST_HANGUP(length, options) {
   if (options.rilRequestError) {
     return;
   }
   this.getCurrentCalls();
 };
 RilObject.prototype[REQUEST_HANGUP_WAITING_OR_BACKGROUND] = function REQUEST_HANGUP_WAITING_OR_BACKGROUND(length, options) {
   if (options.rilRequestError) {
     return;
   }
   this.getCurrentCalls();
 };
 RilObject.prototype[REQUEST_HANGUP_FOREGROUND_RESUME_BACKGROUND] = function REQUEST_HANGUP_FOREGROUND_RESUME_BACKGROUND(length, options) {
   if (options.rilRequestError) {
     return;
   }
   this.getCurrentCalls();
 };
 RilObject.prototype[REQUEST_SWITCH_WAITING_OR_HOLDING_AND_ACTIVE] = function REQUEST_SWITCH_WAITING_OR_HOLDING_AND_ACTIVE(length, options) {
   options.success = (options.rilRequestError === 0);
   if (!options.success) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     this.sendChromeMessage(options);
     return;
   }
   this.sendChromeMessage(options);
   this.getCurrentCalls();
 };
 RilObject.prototype[REQUEST_CONFERENCE] = function REQUEST_CONFERENCE(length, options) {
   options.success = (options.rilRequestError === 0);
   if (!options.success) {
     this._hasConferenceRequest = false;
     options.errorName = "addError";
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     this.sendChromeMessage(options);
     return;
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_UDUB] = null;
 RilObject.prototype[REQUEST_LAST_CALL_FAIL_CAUSE] = function REQUEST_LAST_CALL_FAIL_CAUSE(length, options) {
   let Buf = this.context.Buf;
   let num = length ? Buf.readInt32() : 0;
   let failCause = num ? RIL_CALL_FAILCAUSE_TO_GECKO_CALL_ERROR[Buf.readInt32()] : null;
   if (options.callback) {
     options.callback(failCause);
   }
 };
 RilObject.prototype[REQUEST_SIGNAL_STRENGTH] = function REQUEST_SIGNAL_STRENGTH(length, options) {
   this._receivedNetworkInfo(NETWORK_INFO_SIGNAL);
   if (options.rilRequestError) {
     return;
   }
   let Buf = this.context.Buf;
   let signal = {
     gsmSignalStrength: Buf.readInt32(),
     gsmBitErrorRate:   Buf.readInt32(),
     cdmaDBM:           Buf.readInt32(),
     cdmaECIO:          Buf.readInt32(),
     evdoDBM:           Buf.readInt32(),
     evdoECIO:          Buf.readInt32(),
     evdoSNR:           Buf.readInt32()
   };
   if (!this.v5Legacy) {
     signal.lteSignalStrength = Buf.readInt32();
     signal.lteRSRP =           Buf.readInt32();
     signal.lteRSRQ =           Buf.readInt32();
     signal.lteRSSNR =          Buf.readInt32();
     signal.lteCQI =            Buf.readInt32();
   }
   if (DEBUG) this.context.debug("signal strength: " + JSON.stringify(signal));
   this._processSignalStrength(signal);
 };
 RilObject.prototype[REQUEST_VOICE_REGISTRATION_STATE] = function REQUEST_VOICE_REGISTRATION_STATE(length, options) {
   this._receivedNetworkInfo(NETWORK_INFO_VOICE_REGISTRATION_STATE);
   if (options.rilRequestError) {
     return;
   }
   let state = this.context.Buf.readStringList();
   if (DEBUG) this.context.debug("voice registration state: " + state);
   this._processVoiceRegistrationState(state);
   if (this.cachedDialRequest &&
        (this.voiceRegistrationState.emergencyCallsOnly ||
         this.voiceRegistrationState.connected) &&
       this.voiceRegistrationState.radioTech != NETWORK_CREG_TECH_UNKNOWN) {
     // Radio is ready for making the cached emergency call.
     this.cachedDialRequest.callback();
     this.cachedDialRequest = null;
   }
 };
 RilObject.prototype[REQUEST_DATA_REGISTRATION_STATE] = function REQUEST_DATA_REGISTRATION_STATE(length, options) {
   this._receivedNetworkInfo(NETWORK_INFO_DATA_REGISTRATION_STATE);
   if (options.rilRequestError) {
     return;
   }
   let state = this.context.Buf.readStringList();
   this._processDataRegistrationState(state);
 };
 RilObject.prototype[REQUEST_OPERATOR] = function REQUEST_OPERATOR(length, options) {
   this._receivedNetworkInfo(NETWORK_INFO_OPERATOR);
   if (options.rilRequestError) {
     return;
   }
   let operatorData = this.context.Buf.readStringList();
   if (DEBUG) this.context.debug("Operator: " + operatorData);
   this._processOperator(operatorData);
 };
 RilObject.prototype[REQUEST_RADIO_POWER] = function REQUEST_RADIO_POWER(length, options) {
   if (options.rilMessageType == null) {
     // The request was made by ril_worker itself.
     if (options.rilRequestError) {
       if (this.cachedDialRequest && options.enabled) {
         // Turning on radio fails. Notify the error of making an emergency call.
         this.cachedDialRequest.onerror(GECKO_ERROR_RADIO_NOT_AVAILABLE);
         this.cachedDialRequest = null;
       }
     }
     return;
   }
   options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_DTMF] = null;
 RilObject.prototype[REQUEST_SEND_SMS] = function REQUEST_SEND_SMS(length, options) {
   this._processSmsSendResult(length, options);
 };
 RilObject.prototype[REQUEST_SEND_SMS_EXPECT_MORE] = null;
 RilObject.prototype.readSetupDataCall_v5 = function readSetupDataCall_v5(options) {
   if (!options) {
     options = {};
   }
   let [cid, ifname, addresses, dnses, gateways] = this.context.Buf.readStringList();
   options.cid = cid;
   options.ifname = ifname;
   options.addresses = addresses ? [addresses] : [];
   options.dnses = dnses ? [dnses] : [];
   options.gateways = gateways ? [gateways] : [];
   options.active = DATACALL_ACTIVE_UNKNOWN;
   options.state = GECKO_NETWORK_STATE_CONNECTING;
   return options;
 };
 RilObject.prototype[REQUEST_SETUP_DATA_CALL] = function REQUEST_SETUP_DATA_CALL(length, options) {
   if (options.rilRequestError) {
     // On Data Call generic errors, we shall notify caller
     this._sendDataCallError(options, options.rilRequestError);
     return;
   }
   if (this.v5Legacy) {
     // Populate the `options` object with the data call information. That way
     // we retain the APN and other info about how the data call was set up.
     this.readSetupDataCall_v5(options);
     this.currentDataCalls[options.cid] = options;
     options.rilMessageType = "datacallstatechange";
     this.sendChromeMessage(options);
     // Let's get the list of data calls to ensure we know whether it's active
     // or not.
     this.getDataCallList();
     return;
   }
   // Pass `options` along. That way we retain the APN and other info about
   // how the data call was set up.
   this[REQUEST_DATA_CALL_LIST](length, options);
 };
 RilObject.prototype[REQUEST_SIM_IO] = function REQUEST_SIM_IO(length, options) {
   let ICCIOHelper = this.context.ICCIOHelper;
   if (!length) {
     ICCIOHelper.processICCIOError(options);
     return;
   }
   // Don't need to read rilRequestError since we can know error status from
   // sw1 and sw2.
   let Buf = this.context.Buf;
   options.sw1 = Buf.readInt32();
   options.sw2 = Buf.readInt32();
   if (options.sw1 != ICC_STATUS_NORMAL_ENDING) {
     ICCIOHelper.processICCIOError(options);
     return;
   }
   ICCIOHelper.processICCIO(options);
 };
 RilObject.prototype[REQUEST_SEND_USSD] = function REQUEST_SEND_USSD(length, options) {
   if (DEBUG) {
     this.context.debug("REQUEST_SEND_USSD " + JSON.stringify(options));
   }
   options.success = (this._ussdSession = options.rilRequestError === 0);
   options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_CANCEL_USSD] = function REQUEST_CANCEL_USSD(length, options) {
   if (DEBUG) {
     this.context.debug("REQUEST_CANCEL_USSD" + JSON.stringify(options));
   }
   options.success = (options.rilRequestError === 0);
   this._ussdSession = !options.success;
   options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_GET_CLIR] = function REQUEST_GET_CLIR(length, options) {
   options.success = (options.rilRequestError === 0);
   if (!options.success) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     this.sendChromeMessage(options);
     return;
   }
   let Buf = this.context.Buf;
   let bufLength = Buf.readInt32();
   if (!bufLength || bufLength < 2) {
     options.success = false;
     options.errorMsg = GECKO_ERROR_GENERIC_FAILURE;
     this.sendChromeMessage(options);
     return;
   }
   options.n = Buf.readInt32(); // Will be TS 27.007 +CLIR parameter 'n'.
   options.m = Buf.readInt32(); // Will be TS 27.007 +CLIR parameter 'm'.
   if (options.rilMessageType === "sendMMI") {
     // TS 27.007 +CLIR parameter 'm'.
     switch (options.m) {
       // CLIR not provisioned.
       case 0:
         options.statusMessage = MMI_SM_KS_SERVICE_NOT_PROVISIONED;
         break;
       // CLIR provisioned in permanent mode.
       case 1:
         options.statusMessage = MMI_SM_KS_CLIR_PERMANENT;
         break;
       // Unknown (e.g. no network, etc.).
       case 2:
         options.success = false;
         options.errorMsg = MMI_ERROR_KS_ERROR;
         break;
       // CLIR temporary mode presentation restricted.
       case 3:
         // TS 27.007 +CLIR parameter 'n'.
         switch (options.n) {
           // Default.
           case 0:
           // CLIR invocation.
           case 1:
             options.statusMessage = MMI_SM_KS_CLIR_DEFAULT_ON_NEXT_CALL_ON;
             break;
           // CLIR suppression.
           case 2:
             options.statusMessage = MMI_SM_KS_CLIR_DEFAULT_ON_NEXT_CALL_OFF;
             break;
           default:
             options.success = false;
             options.errorMsg = GECKO_ERROR_GENERIC_FAILURE;
             break;
         }
         break;
       // CLIR temporary mode presentation allowed.
       case 4:
         // TS 27.007 +CLIR parameter 'n'.
         switch (options.n) {
           // Default.
           case 0:
           // CLIR suppression.
           case 2:
             options.statusMessage = MMI_SM_KS_CLIR_DEFAULT_OFF_NEXT_CALL_OFF;
             break;
           // CLIR invocation.
           case 1:
             options.statusMessage = MMI_SM_KS_CLIR_DEFAULT_OFF_NEXT_CALL_ON;
             break;
           default:
             options.success = false;
             options.errorMsg = GECKO_ERROR_GENERIC_FAILURE;
             break;
         }
         break;
       default:
         options.success = false;
         options.errorMsg = GECKO_ERROR_GENERIC_FAILURE;
         break;
     }
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_SET_CLIR] = function REQUEST_SET_CLIR(length, options) {
   if (options.rilMessageType == null) {
     // The request was made by ril_worker itself automatically. Don't report.
     return;
   }
   options.success = (options.rilRequestError === 0);
   if (!options.success) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   } else if (options.rilMessageType === "sendMMI") {
     switch (options.procedure) {
       case MMI_PROCEDURE_ACTIVATION:
         options.statusMessage = MMI_SM_KS_SERVICE_ENABLED;
         break;
       case MMI_PROCEDURE_DEACTIVATION:
         options.statusMessage = MMI_SM_KS_SERVICE_DISABLED;
         break;
     }
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_QUERY_CALL_FORWARD_STATUS] =
   function REQUEST_QUERY_CALL_FORWARD_STATUS(length, options) {
   options.success = (options.rilRequestError === 0);
   if (!options.success) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     this.sendChromeMessage(options);
     return;
   }
   let Buf = this.context.Buf;
   let rulesLength = 0;
   if (length) {
     rulesLength = Buf.readInt32();
   }
   if (!rulesLength) {
     options.success = false;
     options.errorMsg = GECKO_ERROR_GENERIC_FAILURE;
     this.sendChromeMessage(options);
     return;
   }
   let rules = new Array(rulesLength);
   for (let i = 0; i < rulesLength; i++) {
     let rule = {};
     rule.active       = Buf.readInt32() == 1; // CALL_FORWARD_STATUS_*
     rule.reason       = Buf.readInt32(); // CALL_FORWARD_REASON_*
     rule.serviceClass = Buf.readInt32();
     rule.toa          = Buf.readInt32();
     rule.number       = Buf.readString();
     rule.timeSeconds  = Buf.readInt32();
     rules[i] = rule;
   }
   options.rules = rules;
   if (options.rilMessageType === "sendMMI") {
     options.statusMessage = MMI_SM_KS_SERVICE_INTERROGATED;
     // MMI query call forwarding options request returns a set of rules that
     // will be exposed in the form of an array of nsIDOMMozMobileCFInfo
     // instances.
     options.additionalInformation = rules;
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_SET_CALL_FORWARD] =
   function REQUEST_SET_CALL_FORWARD(length, options) {
   options.success = (options.rilRequestError === 0);
   if (!options.success) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   } else if (options.rilMessageType === "sendMMI") {
     switch (options.action) {
       case CALL_FORWARD_ACTION_ENABLE:
         options.statusMessage = MMI_SM_KS_SERVICE_ENABLED;
         break;
       case CALL_FORWARD_ACTION_DISABLE:
         options.statusMessage = MMI_SM_KS_SERVICE_DISABLED;
         break;
       case CALL_FORWARD_ACTION_REGISTRATION:
         options.statusMessage = MMI_SM_KS_SERVICE_REGISTERED;
         break;
       case CALL_FORWARD_ACTION_ERASURE:
         options.statusMessage = MMI_SM_KS_SERVICE_ERASED;
         break;
     }
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_QUERY_CALL_WAITING] =
   function REQUEST_QUERY_CALL_WAITING(length, options) {
   options.success = (options.rilRequestError === 0);
   if (!options.success) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     this.sendChromeMessage(options);
     return;
   }
   if (options.callback) {
     options.callback.call(this, options);
     return;
   }
   let Buf = this.context.Buf;
   options.length = Buf.readInt32();
   options.enabled = ((Buf.readInt32() == 1) &&
                      ((Buf.readInt32() & ICC_SERVICE_CLASS_VOICE) == 0x01));
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_SET_CALL_WAITING] = function REQUEST_SET_CALL_WAITING(length, options) {
   options.success = (options.rilRequestError === 0);
   if (!options.success) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     this.sendChromeMessage(options);
     return;
   }
   if (options.callback) {
     options.callback.call(this, options);
     return;
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_SMS_ACKNOWLEDGE] = null;
 RilObject.prototype[REQUEST_GET_IMEI] = function REQUEST_GET_IMEI(length, options) {
   this.IMEI = this.context.Buf.readString();
   let rilMessageType = options.rilMessageType;
   // So far we only send the IMEI back to chrome if it was requested via MMI.
   if (rilMessageType !== "sendMMI") {
     return;
   }
   options.success = (options.rilRequestError === 0);
   options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   if ((!options.success || this.IMEI == null) && !options.errorMsg) {
     options.errorMsg = GECKO_ERROR_GENERIC_FAILURE;
   }
   options.statusMessage = this.IMEI;
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_GET_IMEISV] = function REQUEST_GET_IMEISV(length, options) {
   if (options.rilRequestError) {
     return;
   }
   this.IMEISV = this.context.Buf.readString();
 };
 RilObject.prototype[REQUEST_ANSWER] = null;
 RilObject.prototype[REQUEST_DEACTIVATE_DATA_CALL] = function REQUEST_DEACTIVATE_DATA_CALL(length, options) {
   if (options.rilRequestError) {
     return;
   }
   let datacall = this.currentDataCalls[options.cid];
   delete this.currentDataCalls[options.cid];
   datacall.state = GECKO_NETWORK_STATE_UNKNOWN;
   datacall.rilMessageType = "datacallstatechange";
   this.sendChromeMessage(datacall);
 };
 RilObject.prototype[REQUEST_QUERY_FACILITY_LOCK] = function REQUEST_QUERY_FACILITY_LOCK(length, options) {
   options.success = (options.rilRequestError === 0);
   if (!options.success) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   }
   let services;
   if (length) {
     // Buf.readInt32List()[0] for Call Barring is a bit vector of services.
     services = this.context.Buf.readInt32List()[0];
   } else {
     options.success = false;
     options.errorMsg = GECKO_ERROR_GENERIC_FAILURE;
     this.sendChromeMessage(options);
     return;
   }
   options.enabled = services === 0 ? false : true;
   if (options.success && (options.rilMessageType === "sendMMI")) {
     if (!options.enabled) {
       options.statusMessage = MMI_SM_KS_SERVICE_DISABLED;
     } else {
       options.statusMessage = MMI_SM_KS_SERVICE_ENABLED_FOR;
       let serviceClass = [];
       for (let serviceClassMask = 1;
            serviceClassMask <= ICC_SERVICE_CLASS_MAX;
            serviceClassMask <<= 1) {
         if ((serviceClassMask & services) !== 0) {
           serviceClass.push(MMI_KS_SERVICE_CLASS_MAPPING[serviceClassMask]);
         }
       }
       options.additionalInformation = serviceClass;
     }
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_SET_FACILITY_LOCK] = function REQUEST_SET_FACILITY_LOCK(length, options) {
   options.success = (options.rilRequestError === 0);
   if (!options.success) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   }
   options.retryCount = length ? this.context.Buf.readInt32List()[0] : -1;
   if (options.success && (options.rilMessageType === "sendMMI")) {
     switch (options.procedure) {
       case MMI_PROCEDURE_ACTIVATION:
         options.statusMessage = MMI_SM_KS_SERVICE_ENABLED;
         break;
       case MMI_PROCEDURE_DEACTIVATION:
         options.statusMessage = MMI_SM_KS_SERVICE_DISABLED;
         break;
     }
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_CHANGE_BARRING_PASSWORD] =
   function REQUEST_CHANGE_BARRING_PASSWORD(length, options) {
   if (options.rilRequestError) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_SIM_OPEN_CHANNEL] = function REQUEST_SIM_OPEN_CHANNEL(length, options) {
   if (options.rilRequestError) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     this.sendChromeMessage(options);
     return;
   }
   options.channel = this.context.Buf.readInt32();
   if (DEBUG) {
     this.context.debug("Setting channel number in options: " + options.channel);
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_SIM_CLOSE_CHANNEL] = function REQUEST_SIM_CLOSE_CHANNEL(length, options) {
   if (options.rilRequestError) {
     options.error = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     this.sendChromeMessage(options);
     return;
   }
   // No return value
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_SIM_ACCESS_CHANNEL] = function REQUEST_SIM_ACCESS_CHANNEL(length, options) {
   if (options.rilRequestError) {
     options.error = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     this.sendChromeMessage(options);
   }
   let Buf = this.context.Buf;
   options.sw1 = Buf.readInt32();
   options.sw2 = Buf.readInt32();
   options.simResponse = Buf.readString();
   if (DEBUG) {
     this.context.debug("Setting return values for RIL[REQUEST_SIM_ACCESS_CHANNEL]: [" +
                        options.sw1 + "," +
                        options.sw2 + ", " +
                        options.simResponse + "]");
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_QUERY_NETWORK_SELECTION_MODE] = function REQUEST_QUERY_NETWORK_SELECTION_MODE(length, options) {
   this._receivedNetworkInfo(NETWORK_INFO_NETWORK_SELECTION_MODE);
   if (options.rilRequestError) {
     return;
   }
   let mode = this.context.Buf.readInt32List();
   let selectionMode;
   switch (mode[0]) {
     case NETWORK_SELECTION_MODE_AUTOMATIC:
       selectionMode = GECKO_NETWORK_SELECTION_AUTOMATIC;
       break;
     case NETWORK_SELECTION_MODE_MANUAL:
       selectionMode = GECKO_NETWORK_SELECTION_MANUAL;
       break;
     default:
       selectionMode = GECKO_NETWORK_SELECTION_UNKNOWN;
       break;
   }
   if (this.networkSelectionMode != selectionMode) {
     this.networkSelectionMode = options.mode = selectionMode;
     options.rilMessageType = "networkselectionmodechange";
     this._sendNetworkInfoMessage(NETWORK_INFO_NETWORK_SELECTION_MODE, options);
   }
 };
 RilObject.prototype[REQUEST_SET_NETWORK_SELECTION_AUTOMATIC] = function REQUEST_SET_NETWORK_SELECTION_AUTOMATIC(length, options) {
   if (options.rilRequestError) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_SET_NETWORK_SELECTION_MANUAL] = function REQUEST_SET_NETWORK_SELECTION_MANUAL(length, options) {
   if (options.rilRequestError) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_QUERY_AVAILABLE_NETWORKS] = function REQUEST_QUERY_AVAILABLE_NETWORKS(length, options) {
   if (options.rilRequestError) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   } else {
     options.networks = this._processNetworks();
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_DTMF_START] = null;
 RilObject.prototype[REQUEST_DTMF_STOP] = null;
 RilObject.prototype[REQUEST_BASEBAND_VERSION] = function REQUEST_BASEBAND_VERSION(length, options) {
   if (options.rilRequestError) {
     return;
   }
   this.basebandVersion = this.context.Buf.readString();
   if (DEBUG) this.context.debug("Baseband version: " + this.basebandVersion);
 };
 RilObject.prototype[REQUEST_SEPARATE_CONNECTION] = function REQUEST_SEPARATE_CONNECTION(length, options) {
   options.success = (options.rilRequestError === 0);
   if (!options.success) {
     options.errorName = "removeError";
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     this.sendChromeMessage(options);
     return;
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_SET_MUTE] = null;
 RilObject.prototype[REQUEST_GET_MUTE] = null;
 RilObject.prototype[REQUEST_QUERY_CLIP] = function REQUEST_QUERY_CLIP(length, options) {
   options.success = (options.rilRequestError === 0);
   if (!options.success) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     this.sendChromeMessage(options);
     return;
   }
   let Buf = this.context.Buf;
   let bufLength = Buf.readInt32();
   if (!bufLength) {
     options.success = false;
     options.errorMsg = GECKO_ERROR_GENERIC_FAILURE;
     this.sendChromeMessage(options);
     return;
   }
   // options.provisioned informs about the called party receives the calling
   // party's address information:
   // 0 for CLIP not provisioned
   // 1 for CLIP provisioned
   // 2 for unknown
   options.provisioned = Buf.readInt32();
   if (options.rilMessageType === "sendMMI") {
     switch (options.provisioned) {
       case 0:
         options.statusMessage = MMI_SM_KS_SERVICE_DISABLED;
         break;
       case 1:
         options.statusMessage = MMI_SM_KS_SERVICE_ENABLED;
         break;
       default:
         options.success = false;
         options.errorMsg = MMI_ERROR_KS_ERROR;
         break;
     }
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_LAST_DATA_CALL_FAIL_CAUSE] = null;
 /**
  * V3:
  *  # address   - A space-delimited list of addresses.
  *
  * V4:
  *  # address   - An address.
  *
  * V5:
  *  # addresses - A space-delimited list of addresses.
  *  # dnses     - A space-delimited list of DNS server addresses.
  *
  * V6:
  *  # addresses - A space-delimited list of addresses with optional "/" prefix
  *                length.
  *  # dnses     - A space-delimited list of DNS server addresses.
  *  # gateways  - A space-delimited list of default gateway addresses.
  */
 RilObject.prototype.readDataCall_v5 = function(options) {
   if (!options) {
     options = {};
   }
   let Buf = this.context.Buf;
   options.cid = Buf.readInt32().toString();
   options.active = Buf.readInt32(); // DATACALL_ACTIVE_*
   options.type = Buf.readString();
   options.apn = Buf.readString();
   let addresses = Buf.readString();
   let dnses = Buf.readString();
   options.addresses = addresses ? addresses.split(" ") : [];
   options.dnses = dnses ? dnses.split(" ") : [];
   options.gateways = [];
   return options;
 };
 RilObject.prototype.readDataCall_v6 = function(options) {
   if (!options) {
     options = {};
   }
   let Buf = this.context.Buf;
   options.status = Buf.readInt32();  // DATACALL_FAIL_*
   options.suggestedRetryTime = Buf.readInt32();
   options.cid = Buf.readInt32().toString();
   options.active = Buf.readInt32();  // DATACALL_ACTIVE_*
   options.type = Buf.readString();
   options.ifname = Buf.readString();
   let addresses = Buf.readString();
   let dnses = Buf.readString();
   let gateways = Buf.readString();
   options.addresses = addresses ? addresses.split(" ") : [];
   options.dnses = dnses ? dnses.split(" ") : [];
   options.gateways = gateways ? gateways.split(" ") : [];
   return options;
 };
 RilObject.prototype[REQUEST_DATA_CALL_LIST] = function REQUEST_DATA_CALL_LIST(length, options) {
   if (options.rilRequestError) {
     return;
   }
   if (!length) {
     this._processDataCallList(null);
     return;
   }
   let Buf = this.context.Buf;
   let version = 0;
   if (!this.v5Legacy) {
     version = Buf.readInt32();
   }
   let num = Buf.readInt32();
   let datacalls = {};
   for (let i = 0; i < num; i++) {
     let datacall;
     if (version < 6) {
       datacall = this.readDataCall_v5();
     } else {
       datacall = this.readDataCall_v6();
     }
     datacalls[datacall.cid] = datacall;
   }
   let newDataCallOptions = null;
   if (options.rilRequestType == REQUEST_SETUP_DATA_CALL) {
     newDataCallOptions = options;
   }
   this._processDataCallList(datacalls, newDataCallOptions);
 };
 RilObject.prototype[REQUEST_RESET_RADIO] = null;
 RilObject.prototype[REQUEST_OEM_HOOK_RAW] = null;
 RilObject.prototype[REQUEST_OEM_HOOK_STRINGS] = null;
 RilObject.prototype[REQUEST_SCREEN_STATE] = null;
 RilObject.prototype[REQUEST_SET_SUPP_SVC_NOTIFICATION] = null;
 RilObject.prototype[REQUEST_WRITE_SMS_TO_SIM] = function REQUEST_WRITE_SMS_TO_SIM(length, options) {
   if (options.rilRequestError) {
     // `The MS shall return a "protocol error, unspecified" error message if
     // the short message cannot be stored in the (U)SIM, and there is other
     // message storage available at the MS` ~ 3GPP TS 23.038 section 4. Here
     // we assume we always have indexed db as another storage.
     this.acknowledgeGsmSms(false, PDU_FCS_PROTOCOL_ERROR);
   } else {
     this.acknowledgeGsmSms(true, PDU_FCS_OK);
   }
 };
 RilObject.prototype[REQUEST_DELETE_SMS_ON_SIM] = null;
 RilObject.prototype[REQUEST_SET_BAND_MODE] = null;
 RilObject.prototype[REQUEST_QUERY_AVAILABLE_BAND_MODE] = null;
 RilObject.prototype[REQUEST_STK_GET_PROFILE] = null;
 RilObject.prototype[REQUEST_STK_SET_PROFILE] = null;
 RilObject.prototype[REQUEST_STK_SEND_ENVELOPE_COMMAND] = null;
 RilObject.prototype[REQUEST_STK_SEND_TERMINAL_RESPONSE] = null;
 RilObject.prototype[REQUEST_STK_HANDLE_CALL_SETUP_REQUESTED_FROM_SIM] = null;
 RilObject.prototype[REQUEST_EXPLICIT_CALL_TRANSFER] = null;
 RilObject.prototype[REQUEST_SET_PREFERRED_NETWORK_TYPE] = function REQUEST_SET_PREFERRED_NETWORK_TYPE(length, options) {
   if (options.networkType == null) {
     // The request was made by ril_worker itself automatically. Don't report.
     return;
   }
   if (options.rilRequestError) {
     options.success = false;
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   } else {
     options.success = true;
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_GET_PREFERRED_NETWORK_TYPE] = function REQUEST_GET_PREFERRED_NETWORK_TYPE(length, options) {
   if (options.rilRequestError) {
     options.success = false;
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     this.sendChromeMessage(options);
     return;
   }
   let results = this.context.Buf.readInt32List();
   options.networkType = this.preferredNetworkType = results[0];
   options.success = true;
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_GET_NEIGHBORING_CELL_IDS] = null;
 RilObject.prototype[REQUEST_SET_LOCATION_UPDATES] = null;
 RilObject.prototype[REQUEST_CDMA_SET_SUBSCRIPTION_SOURCE] = null;
 RilObject.prototype[REQUEST_CDMA_SET_ROAMING_PREFERENCE] = function REQUEST_CDMA_SET_ROAMING_PREFERENCE(length, options) {
   if (options.rilRequestError) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_CDMA_QUERY_ROAMING_PREFERENCE] = function REQUEST_CDMA_QUERY_ROAMING_PREFERENCE(length, options) {
   if (options.rilRequestError) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   } else {
     let mode = this.context.Buf.readInt32List();
     options.mode = CDMA_ROAMING_PREFERENCE_TO_GECKO[mode[0]];
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_SET_TTY_MODE] = null;
 RilObject.prototype[REQUEST_QUERY_TTY_MODE] = null;
 RilObject.prototype[REQUEST_CDMA_SET_PREFERRED_VOICE_PRIVACY_MODE] = function REQUEST_CDMA_SET_PREFERRED_VOICE_PRIVACY_MODE(length, options) {
   if (options.rilRequestError) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     this.sendChromeMessage(options);
     return;
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_CDMA_QUERY_PREFERRED_VOICE_PRIVACY_MODE] = function REQUEST_CDMA_QUERY_PREFERRED_VOICE_PRIVACY_MODE(length, options) {
   if (options.rilRequestError) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     this.sendChromeMessage(options);
     return;
   }
   let enabled = this.context.Buf.readInt32List();
   options.enabled = enabled[0] ? true : false;
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_CDMA_FLASH] = function REQUEST_CDMA_FLASH(length, options) {
   options.success = (options.rilRequestError === 0);
   if (!options.success) {
     if (options.rilMessageType === "conferenceCall") {
       options.errorName = "addError";
     } else if (options.rilMessageType === "separateCall") {
       options.errorName = "removeError";
     }
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_CDMA_BURST_DTMF] = null;
 RilObject.prototype[REQUEST_CDMA_VALIDATE_AND_WRITE_AKEY] = null;
 RilObject.prototype[REQUEST_CDMA_SEND_SMS] = function REQUEST_CDMA_SEND_SMS(length, options) {
   this._processSmsSendResult(length, options);
 };
 RilObject.prototype[REQUEST_CDMA_SMS_ACKNOWLEDGE] = null;
 RilObject.prototype[REQUEST_GSM_GET_BROADCAST_SMS_CONFIG] = null;
 RilObject.prototype[REQUEST_GSM_SET_BROADCAST_SMS_CONFIG] = function REQUEST_GSM_SET_BROADCAST_SMS_CONFIG(length, options) {
   if (options.rilRequestError == ERROR_SUCCESS) {
     this.setSmsBroadcastActivation(true);
   }
 };
 RilObject.prototype[REQUEST_GSM_SMS_BROADCAST_ACTIVATION] = null;
 RilObject.prototype[REQUEST_CDMA_GET_BROADCAST_SMS_CONFIG] = null;
 RilObject.prototype[REQUEST_CDMA_SET_BROADCAST_SMS_CONFIG] = null;
 RilObject.prototype[REQUEST_CDMA_SMS_BROADCAST_ACTIVATION] = null;
 RilObject.prototype[REQUEST_CDMA_SUBSCRIPTION] = function REQUEST_CDMA_SUBSCRIPTION(length, options) {
   if (options.rilRequestError) {
     return;
   }
   let result = this.context.Buf.readStringList();
   this.iccInfo.mdn = result[0];
   // The result[1] is Home SID. (Already be handled in readCDMAHome())
   // The result[2] is Home NID. (Already be handled in readCDMAHome())
   // The result[3] is MIN.
   this.iccInfo.prlVersion = parseInt(result[4], 10);
   this.context.ICCUtilsHelper.handleICCInfoChange();
 };
 RilObject.prototype[REQUEST_CDMA_WRITE_SMS_TO_RUIM] = null;
 RilObject.prototype[REQUEST_CDMA_DELETE_SMS_ON_RUIM] = null;
 RilObject.prototype[REQUEST_DEVICE_IDENTITY] = function REQUEST_DEVICE_IDENTITY(length, options) {
   if (options.rilRequestError) {
     return;
   }
   let result = this.context.Buf.readStringList();
   // The result[0] is for IMEI. (Already be handled in REQUEST_GET_IMEI)
   // The result[1] is for IMEISV. (Already be handled in REQUEST_GET_IMEISV)
   // They are both ignored.
   this.ESN = result[2];
   this.MEID = result[3];
 };
 RilObject.prototype[REQUEST_EXIT_EMERGENCY_CALLBACK_MODE] = function REQUEST_EXIT_EMERGENCY_CALLBACK_MODE(length, options) {
   if (options.internal) {
     return;
   }
   options.success = (options.rilRequestError === 0);
   if (!options.success) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   }
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_GET_SMSC_ADDRESS] = function REQUEST_GET_SMSC_ADDRESS(length, options) {
   this.SMSC = options.rilRequestError ? null : this.context.Buf.readString();
   if (!options.rilMessageType || options.rilMessageType !== "getSmscAddress") {
     return;
   }
   options.smscAddress = this.SMSC;
   options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   this.sendChromeMessage(options);
 };
 RilObject.prototype[REQUEST_SET_SMSC_ADDRESS] = null;
 RilObject.prototype[REQUEST_REPORT_SMS_MEMORY_STATUS] = null;
 RilObject.prototype[REQUEST_REPORT_STK_SERVICE_IS_RUNNING] = null;
 RilObject.prototype[REQUEST_ACKNOWLEDGE_INCOMING_GSM_SMS_WITH_PDU] = null;
 RilObject.prototype[REQUEST_STK_SEND_ENVELOPE_WITH_STATUS] = function REQUEST_STK_SEND_ENVELOPE_WITH_STATUS(length, options) {
   if (options.rilRequestError) {
     this.acknowledgeGsmSms(false, PDU_FCS_UNSPECIFIED);
     return;
   }
   let Buf = this.context.Buf;
   let sw1 = Buf.readInt32();
   let sw2 = Buf.readInt32();
   if ((sw1 == ICC_STATUS_SAT_BUSY) && (sw2 === 0x00)) {
     this.acknowledgeGsmSms(false, PDU_FCS_USAT_BUSY);
     return;
   }
   let success = ((sw1 == ICC_STATUS_NORMAL_ENDING) && (sw2 === 0x00))
                 || (sw1 == ICC_STATUS_NORMAL_ENDING_WITH_EXTRA);
   let messageStringLength = Buf.readInt32(); // In semi-octets
   let responsePduLen = messageStringLength / 2; // In octets
   if (!responsePduLen) {
     this.acknowledgeGsmSms(success, success ? PDU_FCS_OK
                                          : PDU_FCS_USIM_DATA_DOWNLOAD_ERROR);
     return;
   }
   this.acknowledgeIncomingGsmSmsWithPDU(success, responsePduLen, options);
 };
 RilObject.prototype[REQUEST_VOICE_RADIO_TECH] = function REQUEST_VOICE_RADIO_TECH(length, options) {
   if (options.rilRequestError) {
     if (DEBUG) {
       this.context.debug("Error when getting voice radio tech: " +
                          options.rilRequestError);
     }
     return;
   }
   let radioTech = this.context.Buf.readInt32List();
   this._processRadioTech(radioTech[0]);
 };
 RilObject.prototype[REQUEST_GET_UNLOCK_RETRY_COUNT] = function REQUEST_GET_UNLOCK_RETRY_COUNT(length, options) {
   options.success = (options.rilRequestError === 0);
   if (!options.success) {
     options.errorMsg = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
   }
   options.retryCount = length ? this.context.Buf.readInt32List()[0] : -1;
   this.sendChromeMessage(options);
 };
 RilObject.prototype[RIL_REQUEST_GPRS_ATTACH] = null;
 RilObject.prototype[RIL_REQUEST_GPRS_DETACH] = null;
 RilObject.prototype[UNSOLICITED_RESPONSE_RADIO_STATE_CHANGED] = function UNSOLICITED_RESPONSE_RADIO_STATE_CHANGED() {
   let radioState = this.context.Buf.readInt32();
   let newState;
   if (radioState == RADIO_STATE_UNAVAILABLE) {
     newState = GECKO_RADIOSTATE_UNAVAILABLE;
   } else if (radioState == RADIO_STATE_OFF) {
     newState = GECKO_RADIOSTATE_OFF;
   } else {
     newState = GECKO_RADIOSTATE_READY;
   }
   if (DEBUG) {
     this.context.debug("Radio state changed from '" + this.radioState +
                        "' to '" + newState + "'");
   }
   if (this.radioState == newState) {
     return;
   }
   switch (radioState) {
   case RADIO_STATE_SIM_READY:
   case RADIO_STATE_SIM_NOT_READY:
   case RADIO_STATE_SIM_LOCKED_OR_ABSENT:
     this._isCdma = false;
     this._waitingRadioTech = false;
     break;
   case RADIO_STATE_RUIM_READY:
   case RADIO_STATE_RUIM_NOT_READY:
   case RADIO_STATE_RUIM_LOCKED_OR_ABSENT:
   case RADIO_STATE_NV_READY:
   case RADIO_STATE_NV_NOT_READY:
     this._isCdma = true;
     this._waitingRadioTech = false;
     break;
   case RADIO_STATE_ON: // RIL v7
     // This value is defined in RIL v7, we will retrieve radio tech by another
     // request. We leave _isCdma untouched, and it will be set once we get the
     // radio technology.
     this._waitingRadioTech = true;
     this.getVoiceRadioTechnology();
     break;
   }
   if ((this.radioState == GECKO_RADIOSTATE_UNAVAILABLE ||
        this.radioState == GECKO_RADIOSTATE_OFF) &&
        newState == GECKO_RADIOSTATE_READY) {
     // The radio became available, let's get its info.
     if (!this._waitingRadioTech) {
       if (this._isCdma) {
         this.getDeviceIdentity();
       } else {
         this.getIMEI();
         this.getIMEISV();
       }
     }
     this.getBasebandVersion();
     this.updateCellBroadcastConfig();
     this.setPreferredNetworkType();
     this.setCLIR();
     if (RILQUIRKS_DATA_REGISTRATION_ON_DEMAND && this._attachDataRegistration) {
       this.setDataRegistration({attach: true});
     }
   }
   this.radioState = newState;
   this.sendChromeMessage({
     rilMessageType: "radiostatechange",
     radioState: newState
   });
   // If the radio is up and on, so let's query the card state.
   // On older RILs only if the card is actually ready, though.
   // If _waitingRadioTech is set, we don't need to get icc status now.
   if (radioState == RADIO_STATE_UNAVAILABLE ||
       radioState == RADIO_STATE_OFF ||
       this._waitingRadioTech) {
     return;
   }
   this.getICCStatus();
 };
 RilObject.prototype[UNSOLICITED_RESPONSE_CALL_STATE_CHANGED] = function UNSOLICITED_RESPONSE_CALL_STATE_CHANGED() {
   this.getCurrentCalls();
 };
 RilObject.prototype[UNSOLICITED_RESPONSE_VOICE_NETWORK_STATE_CHANGED] = function UNSOLICITED_RESPONSE_VOICE_NETWORK_STATE_CHANGED() {
   if (DEBUG) {
     this.context.debug("Network state changed, re-requesting phone state and " +
                        "ICC status");
   }
   this.getICCStatus();
   this.requestNetworkInfo();
 };
 RilObject.prototype[UNSOLICITED_RESPONSE_NEW_SMS] = function UNSOLICITED_RESPONSE_NEW_SMS(length) {
   let [message, result] = this.context.GsmPDUHelper.processReceivedSms(length);
   if (message) {
     result = this._processSmsMultipart(message);
   }
   if (result == PDU_FCS_RESERVED || result == MOZ_FCS_WAIT_FOR_EXPLICIT_ACK) {
     return;
   }
   // Not reserved FCS values, send ACK now.
   this.acknowledgeGsmSms(result == PDU_FCS_OK, result);
 };
 RilObject.prototype[UNSOLICITED_RESPONSE_NEW_SMS_STATUS_REPORT] = function UNSOLICITED_RESPONSE_NEW_SMS_STATUS_REPORT(length) {
   let result = this._processSmsStatusReport(length);
   this.acknowledgeGsmSms(result == PDU_FCS_OK, result);
 };
 RilObject.prototype[UNSOLICITED_RESPONSE_NEW_SMS_ON_SIM] = function UNSOLICITED_RESPONSE_NEW_SMS_ON_SIM(length) {
   let recordNumber = this.context.Buf.readInt32List()[0];
   this.context.SimRecordHelper.readSMS(
     recordNumber,
     function onsuccess(message) {
       if (message && message.simStatus === 3) { //New Unread SMS
         this._processSmsMultipart(message);
       }
     }.bind(this),
     function onerror(errorMsg) {
       if (DEBUG) {
         this.context.debug("Failed to Read NEW SMS on SIM #" + recordNumber +
                            ", errorMsg: " + errorMsg);
       }
     });
 };
 RilObject.prototype[UNSOLICITED_ON_USSD] = function UNSOLICITED_ON_USSD() {
   let [typeCode, message] = this.context.Buf.readStringList();
   if (DEBUG) {
     this.context.debug("On USSD. Type Code: " + typeCode + " Message: " + message);
   }
   this._ussdSession = (typeCode != "0" && typeCode != "2");
   this.sendChromeMessage({rilMessageType: "USSDReceived",
                           message: message,
                           sessionEnded: !this._ussdSession});
 };
 RilObject.prototype[UNSOLICITED_NITZ_TIME_RECEIVED] = function UNSOLICITED_NITZ_TIME_RECEIVED() {
   let dateString = this.context.Buf.readString();
   // The data contained in the NITZ message is
   // in the form "yy/mm/dd,hh:mm:ss(+/-)tz,dt"
   // for example: 12/02/16,03:36:08-20,00,310410
   // See also bug 714352 - Listen for NITZ updates from rild.
   if (DEBUG) this.context.debug("DateTimeZone string " + dateString);
   let now = Date.now();
   let year = parseInt(dateString.substr(0, 2), 10);
   let month = parseInt(dateString.substr(3, 2), 10);
   let day = parseInt(dateString.substr(6, 2), 10);
   let hours = parseInt(dateString.substr(9, 2), 10);
   let minutes = parseInt(dateString.substr(12, 2), 10);
   let seconds = parseInt(dateString.substr(15, 2), 10);
   // Note that |tz| is in 15-min units.
   let tz = parseInt(dateString.substr(17, 3), 10);
   // Note that |dst| is in 1-hour units and is already applied in |tz|.
   let dst = parseInt(dateString.substr(21, 2), 10);
   let timeInMS = Date.UTC(year + PDU_TIMESTAMP_YEAR_OFFSET, month - 1, day,
                           hours, minutes, seconds);
   if (isNaN(timeInMS)) {
     if (DEBUG) this.context.debug("NITZ failed to convert date");
     return;
   }
   this.sendChromeMessage({rilMessageType: "nitzTime",
                           networkTimeInMS: timeInMS,
                           networkTimeZoneInMinutes: -(tz * 15),
                           networkDSTInMinutes: -(dst * 60),
                           receiveTimeInMS: now});
 };
 RilObject.prototype[UNSOLICITED_SIGNAL_STRENGTH] = function UNSOLICITED_SIGNAL_STRENGTH(length) {
   this[REQUEST_SIGNAL_STRENGTH](length, {rilRequestError: ERROR_SUCCESS});
 };
 RilObject.prototype[UNSOLICITED_DATA_CALL_LIST_CHANGED] = function UNSOLICITED_DATA_CALL_LIST_CHANGED(length) {
   if (this.v5Legacy) {
     this.getDataCallList();
     return;
   }
   this[REQUEST_DATA_CALL_LIST](length, {rilRequestError: ERROR_SUCCESS});
 };
 RilObject.prototype[UNSOLICITED_SUPP_SVC_NOTIFICATION] = function UNSOLICITED_SUPP_SVC_NOTIFICATION(length) {
   let Buf = this.context.Buf;
   let info = {};
   info.notificationType = Buf.readInt32();
   info.code = Buf.readInt32();
   info.index = Buf.readInt32();
   info.type = Buf.readInt32();
   info.number = Buf.readString();
   this._processSuppSvcNotification(info);
 };
 RilObject.prototype[UNSOLICITED_STK_SESSION_END] = function UNSOLICITED_STK_SESSION_END() {
   this.sendChromeMessage({rilMessageType: "stksessionend"});
 };
 RilObject.prototype[UNSOLICITED_STK_PROACTIVE_COMMAND] = function UNSOLICITED_STK_PROACTIVE_COMMAND() {
   this.processStkProactiveCommand();
 };
 RilObject.prototype[UNSOLICITED_STK_EVENT_NOTIFY] = function UNSOLICITED_STK_EVENT_NOTIFY() {
   this.processStkProactiveCommand();
 };
 RilObject.prototype[UNSOLICITED_STK_CALL_SETUP] = null;
 RilObject.prototype[UNSOLICITED_SIM_SMS_STORAGE_FULL] = null;
 RilObject.prototype[UNSOLICITED_SIM_REFRESH] = null;
 RilObject.prototype[UNSOLICITED_CALL_RING] = function UNSOLICITED_CALL_RING() {
   let Buf = this.context.Buf;
   let info = {rilMessageType: "callRing"};
   let isCDMA = false; //XXX TODO hard-code this for now
   if (isCDMA) {
     info.isPresent = Buf.readInt32();
     info.signalType = Buf.readInt32();
     info.alertPitch = Buf.readInt32();
     info.signal = Buf.readInt32();
   }
   // At this point we don't know much other than the fact there's an incoming
   // call, but that's enough to bring up the Phone app already. We'll know
   // details once we get a call state changed notification and can then
   // dispatch DOM events etc.
   this.sendChromeMessage(info);
 };
 RilObject.prototype[UNSOLICITED_RESPONSE_SIM_STATUS_CHANGED] = function UNSOLICITED_RESPONSE_SIM_STATUS_CHANGED() {
   this.getICCStatus();
 };
 RilObject.prototype[UNSOLICITED_RESPONSE_CDMA_NEW_SMS] = function UNSOLICITED_RESPONSE_CDMA_NEW_SMS(length) {
   let [message, result] = this.context.CdmaPDUHelper.processReceivedSms(length);
   if (message) {
     if (message.teleservice === PDU_CDMA_MSG_TELESERIVCIE_ID_WAP) {
       result = this._processCdmaSmsWapPush(message);
     } else if (message.subMsgType === PDU_CDMA_MSG_TYPE_DELIVER_ACK) {
       result = this._processCdmaSmsStatusReport(message);
     } else {
       result = this._processSmsMultipart(message);
     }
   }
   if (result == PDU_FCS_RESERVED || result == MOZ_FCS_WAIT_FOR_EXPLICIT_ACK) {
     return;
   }
   // Not reserved FCS values, send ACK now.
   this.acknowledgeCdmaSms(result == PDU_FCS_OK, result);
 };
 RilObject.prototype[UNSOLICITED_RESPONSE_NEW_BROADCAST_SMS] = function UNSOLICITED_RESPONSE_NEW_BROADCAST_SMS(length) {
   let message;
   try {
     message =
       this.context.GsmPDUHelper.readCbMessage(this.context.Buf.readInt32());
   } catch (e) {
     if (DEBUG) {
       this.context.debug("Failed to parse Cell Broadcast message: " +
                          JSON.stringify(e));
     }
     return;
   }
   message = this._processReceivedSmsCbPage(message);
   if (!message) {
     return;
   }
   message.rilMessageType = "cellbroadcast-received";
   this.sendChromeMessage(message);
 };
 RilObject.prototype[UNSOLICITED_CDMA_RUIM_SMS_STORAGE_FULL] = null;
 RilObject.prototype[UNSOLICITED_RESTRICTED_STATE_CHANGED] = null;
 RilObject.prototype[UNSOLICITED_ENTER_EMERGENCY_CALLBACK_MODE] = function UNSOLICITED_ENTER_EMERGENCY_CALLBACK_MODE() {
   this._handleChangedEmergencyCbMode(true);
 };
 RilObject.prototype[UNSOLICITED_CDMA_CALL_WAITING] = function UNSOLICITED_CDMA_CALL_WAITING(length) {
   let Buf = this.context.Buf;
   let call = {};
   call.number              = Buf.readString();
   call.numberPresentation  = Buf.readInt32();
   call.name                = Buf.readString();
   call.namePresentation    = Buf.readInt32();
   call.isPresent           = Buf.readInt32();
   call.signalType          = Buf.readInt32();
   call.alertPitch          = Buf.readInt32();
   call.signal              = Buf.readInt32();
   this.sendChromeMessage({rilMessageType: "cdmaCallWaiting",
                           number: call.number});
 };
 RilObject.prototype[UNSOLICITED_CDMA_OTA_PROVISION_STATUS] = function UNSOLICITED_CDMA_OTA_PROVISION_STATUS() {
   let status = this.context.Buf.readInt32List()[0];
   this.sendChromeMessage({rilMessageType: "otastatuschange",
                           status: status});
 };
 RilObject.prototype[UNSOLICITED_CDMA_INFO_REC] = function UNSOLICITED_CDMA_INFO_REC(length) {
   let record = this.context.CdmaPDUHelper.decodeInformationRecord();
   record.rilMessageType = "cdma-info-rec-received";
   this.sendChromeMessage(record);
 };
 RilObject.prototype[UNSOLICITED_OEM_HOOK_RAW] = null;
 RilObject.prototype[UNSOLICITED_RINGBACK_TONE] = null;
 RilObject.prototype[UNSOLICITED_RESEND_INCALL_MUTE] = null;
 RilObject.prototype[UNSOLICITED_CDMA_SUBSCRIPTION_SOURCE_CHANGED] = null;
 RilObject.prototype[UNSOLICITED_CDMA_PRL_CHANGED] = function UNSOLICITED_CDMA_PRL_CHANGED(length) {
   let version = this.context.Buf.readInt32List()[0];
   if (version !== this.iccInfo.prlVersion) {
     this.iccInfo.prlVersion = version;
     this.context.ICCUtilsHelper.handleICCInfoChange();
   }
 };
 RilObject.prototype[UNSOLICITED_EXIT_EMERGENCY_CALLBACK_MODE] = function UNSOLICITED_EXIT_EMERGENCY_CALLBACK_MODE() {
   this._handleChangedEmergencyCbMode(false);
 };
 RilObject.prototype[UNSOLICITED_RIL_CONNECTED] = function UNSOLICITED_RIL_CONNECTED(length) {
   // Prevent response id collision between UNSOLICITED_RIL_CONNECTED and
   // UNSOLICITED_VOICE_RADIO_TECH_CHANGED for Akami on gingerbread branch.
   if (!length) {
     return;
   }
   let version = this.context.Buf.readInt32List()[0];
   this.v5Legacy = (version < 5);
   if (DEBUG) {
     this.context.debug("Detected RIL version " + version);
     this.context.debug("this.v5Legacy is " + this.v5Legacy);
   }
   this.initRILState();
   // Always ensure that we are not in emergency callback mode when init.
   this.exitEmergencyCbMode();
   // Reset radio in the case that b2g restart (or crash).
   this.setRadioEnabled({enabled: false});
 };
 /**
  * This object exposes the functionality to parse and serialize PDU strings
  *
  * A PDU is a string containing a series of hexadecimally encoded octets
  * or nibble-swapped binary-coded decimals (BCDs). It contains not only the
  * message text but information about the sender, the SMS service center,
  * timestamp, etc.
  */
 function GsmPDUHelperObject(aContext) {
   this.context = aContext;
 }
 GsmPDUHelperObject.prototype = {
   context: null,
   /**
    * Read one character (2 bytes) from a RIL string and decode as hex.
    *
    * @return the nibble as a number.
    */
   readHexNibble: function() {
     let nibble = this.context.Buf.readUint16();
     if (nibble >= 48 && nibble <= 57) {
       nibble -= 48; // ASCII '0'..'9'
     } else if (nibble >= 65 && nibble <= 70) {
       nibble -= 55; // ASCII 'A'..'F'
     } else if (nibble >= 97 && nibble <= 102) {
       nibble -= 87; // ASCII 'a'..'f'
     } else {
       throw "Found invalid nibble during PDU parsing: " +
             String.fromCharCode(nibble);
     }
     return nibble;
   },
   /**
    * Encode a nibble as one hex character in a RIL string (2 bytes).
    *
    * @param nibble
    *        The nibble to encode (represented as a number)
    */
   writeHexNibble: function(nibble) {
     nibble &= 0x0f;
     if (nibble < 10) {
       nibble += 48; // ASCII '0'
     } else {
       nibble += 55; // ASCII 'A'
     }
     this.context.Buf.writeUint16(nibble);
   },
   /**
    * Read a hex-encoded octet (two nibbles).
    *
    * @return the octet as a number.
    */
   readHexOctet: function() {
     return (this.readHexNibble() << 4) | this.readHexNibble();
   },
   /**
    * Write an octet as two hex-encoded nibbles.
    *
    * @param octet
    *        The octet (represented as a number) to encode.
    */
   writeHexOctet: function(octet) {
     this.writeHexNibble(octet >> 4);
     this.writeHexNibble(octet);
   },
   /**
    * Read an array of hex-encoded octets.
    */
   readHexOctetArray: function(length) {
     let array = new Uint8Array(length);
     for (let i = 0; i < length; i++) {
       array[i] = this.readHexOctet();
     }
     return array;
   },
   /**
    * Convert an octet (number) to a BCD number.
    *
    * Any nibbles that are not in the BCD range count as 0.
    *
    * @param octet
    *        The octet (a number, as returned by getOctet())
    *
    * @return the corresponding BCD number.
    */
   octetToBCD: function(octet) {
     return ((octet & 0xf0) <= 0x90) * ((octet >> 4) & 0x0f) +
            ((octet & 0x0f) <= 0x09) * (octet & 0x0f) * 10;
   },
   /**
    * Convert a BCD number to an octet (number)
    *
    * Only take two digits with absolute value.
    *
    * @param bcd
    *
    * @return the corresponding octet.
    */
   BCDToOctet: function(bcd) {
     bcd = Math.abs(bcd);
     return ((bcd % 10) << 4) + (Math.floor(bcd / 10) % 10);
   },
   /**
    * Convert a semi-octet (number) to a GSM BCD char, or return empty string
    * if invalid semiOctet and supressException is set to true.
    *
    * @param semiOctet
    *        Nibble to be converted to.
    * @param [optional] supressException
    *        Supress exception if invalid semiOctet and supressException is set
    *        to true.
    *
    * @return GSM BCD char, or empty string.
    */
   bcdChars: "0123456789*#,;",
   semiOctetToBcdChar: function(semiOctet, supressException) {
     if (semiOctet >= 14) {
       if (supressException) {
         return "";
       } else {
         throw new RangeError();
       }
     }
     return this.bcdChars.charAt(semiOctet);
   },
   /**
    * Read a *swapped nibble* binary coded decimal (BCD)
    *
    * @param pairs
    *        Number of nibble *pairs* to read.
    *
    * @return the decimal as a number.
    */
   readSwappedNibbleBcdNum: function(pairs) {
     let number = 0;
     for (let i = 0; i < pairs; i++) {
       let octet = this.readHexOctet();
       // Ignore 'ff' octets as they're often used as filler.
       if (octet == 0xff) {
         continue;
       }
       // If the first nibble is an "F" , only the second nibble is to be taken
       // into account.
       if ((octet & 0xf0) == 0xf0) {
         number *= 10;
         number += octet & 0x0f;
         continue;
       }
       number *= 100;
       number += this.octetToBCD(octet);
     }
     return number;
   },
   /**
    * Read a *swapped nibble* binary coded string (BCD)
    *
    * @param pairs
    *        Number of nibble *pairs* to read.
    * @param [optional] supressException
    *        Supress exception if invalid semiOctet and supressException is set
    *        to true.
    *
    * @return The BCD string.
    */
   readSwappedNibbleBcdString: function(pairs, supressException) {
     let str = "";
     for (let i = 0; i < pairs; i++) {
       let nibbleH = this.readHexNibble();
       let nibbleL = this.readHexNibble();
       if (nibbleL == 0x0F) {
         break;
       }
       str += this.semiOctetToBcdChar(nibbleL, supressException);
       if (nibbleH != 0x0F) {
         str += this.semiOctetToBcdChar(nibbleH, supressException);
       }
     }
     return str;
   },
   /**
    * Write numerical data as swapped nibble BCD.
    *
    * @param data
    *        Data to write (as a string or a number)
    */
   writeSwappedNibbleBCD: function(data) {
     data = data.toString();
     if (data.length % 2) {
       data += "F";
     }
     let Buf = this.context.Buf;
     for (let i = 0; i < data.length; i += 2) {
       Buf.writeUint16(data.charCodeAt(i + 1));
       Buf.writeUint16(data.charCodeAt(i));
     }
   },
   /**
    * Write numerical data as swapped nibble BCD.
    * If the number of digit of data is even, add '0' at the beginning.
    *
    * @param data
    *        Data to write (as a string or a number)
    */
   writeSwappedNibbleBCDNum: function(data) {
     data = data.toString();
     if (data.length % 2) {
       data = "0" + data;
     }
     let Buf = this.context.Buf;
     for (let i = 0; i < data.length; i += 2) {
       Buf.writeUint16(data.charCodeAt(i + 1));
       Buf.writeUint16(data.charCodeAt(i));
     }
   },
   /**
    * Read user data, convert to septets, look up relevant characters in a
    * 7-bit alphabet, and construct string.
    *
    * @param length
    *        Number of septets to read (*not* octets)
    * @param paddingBits
    *        Number of padding bits in the first byte of user data.
    * @param langIndex
    *        Table index used for normal 7-bit encoded character lookup.
    * @param langShiftIndex
    *        Table index used for escaped 7-bit encoded character lookup.
    *
    * @return a string.
    */
   readSeptetsToString: function(length, paddingBits, langIndex, langShiftIndex) {
     let ret = "";
     let byteLength = Math.ceil((length * 7 + paddingBits) / 8);
     /**
      * |<-                    last byte in header                    ->|
      * |<-           incompleteBits          ->|<- last header septet->|
      * +===7===|===6===|===5===|===4===|===3===|===2===|===1===|===0===|
      *
      * |<-                   1st byte in user data                   ->|
      * |<-               data septet 1               ->|<-paddingBits->|
      * +===7===|===6===|===5===|===4===|===3===|===2===|===1===|===0===|
      *
      * |<-                   2nd byte in user data                   ->|
      * |<-                   data spetet 2                   ->|<-ds1->|
      * +===7===|===6===|===5===|===4===|===3===|===2===|===1===|===0===|
      */
     let data = 0;
     let dataBits = 0;
     if (paddingBits) {
       data = this.readHexOctet() >> paddingBits;
       dataBits = 8 - paddingBits;
       --byteLength;
     }
     let escapeFound = false;
     const langTable = PDU_NL_LOCKING_SHIFT_TABLES[langIndex];
     const langShiftTable = PDU_NL_SINGLE_SHIFT_TABLES[langShiftIndex];
     do {
       // Read as much as fits in 32bit word
       let bytesToRead = Math.min(byteLength, dataBits ? 3 : 4);
       for (let i = 0; i < bytesToRead; i++) {
         data |= this.readHexOctet() << dataBits;
         dataBits += 8;
         --byteLength;
       }
       // Consume available full septets
       for (; dataBits >= 7; dataBits -= 7) {
         let septet = data & 0x7F;
         data >>>= 7;
         if (escapeFound) {
           escapeFound = false;
           if (septet == PDU_NL_EXTENDED_ESCAPE) {
             // According to 3GPP TS 23.038, section 6.2.1.1, NOTE 1, "On
             // receipt of this code, a receiving entity shall display a space
             // until another extensiion table is defined."
             ret += " ";
           } else if (septet == PDU_NL_RESERVED_CONTROL) {
             // According to 3GPP TS 23.038 B.2, "This code represents a control
             // character and therefore must not be used for language specific
             // characters."
             ret += " ";
           } else {
             ret += langShiftTable[septet];
           }
         } else if (septet == PDU_NL_EXTENDED_ESCAPE) {
           escapeFound = true;
           // <escape> is not an effective character
           --length;
         } else {
           ret += langTable[septet];
         }
       }
     } while (byteLength);
     if (ret.length != length) {
       /**
        * If num of effective characters does not equal to the length of read
        * string, cut the tail off. This happens when the last octet of user
        * data has following layout:
        *
        * |<-              penultimate octet in user data               ->|
        * |<-               data septet N               ->|<-   dsN-1   ->|
        * +===7===|===6===|===5===|===4===|===3===|===2===|===1===|===0===|
        *
        * |<-                  last octet in user data                  ->|
        * |<-                       fill bits                   ->|<-dsN->|
        * +===7===|===6===|===5===|===4===|===3===|===2===|===1===|===0===|
        *
        * The fill bits in the last octet may happen to form a full septet and
        * be appended at the end of result string.
        */
       ret = ret.slice(0, length);
     }
     return ret;
   },
   writeStringAsSeptets: function(message, paddingBits, langIndex, langShiftIndex) {
     const langTable = PDU_NL_LOCKING_SHIFT_TABLES[langIndex];
     const langShiftTable = PDU_NL_SINGLE_SHIFT_TABLES[langShiftIndex];
     let dataBits = paddingBits;
     let data = 0;
     for (let i = 0; i < message.length; i++) {
       let c = message.charAt(i);
       let septet = langTable.indexOf(c);
       if (septet == PDU_NL_EXTENDED_ESCAPE) {
         continue;
       }
       if (septet >= 0) {
         data |= septet << dataBits;
         dataBits += 7;
       } else {
         septet = langShiftTable.indexOf(c);
         if (septet == -1) {
           throw new Error("'" + c + "' is not in 7 bit alphabet "
                           + langIndex + ":" + langShiftIndex + "!");
         }
         if (septet == PDU_NL_RESERVED_CONTROL) {
           continue;
         }
         data |= PDU_NL_EXTENDED_ESCAPE << dataBits;
         dataBits += 7;
         data |= septet << dataBits;
         dataBits += 7;
       }
       for (; dataBits >= 8; dataBits -= 8) {
         this.writeHexOctet(data & 0xFF);
         data >>>= 8;
       }
     }
     if (dataBits !== 0) {
       this.writeHexOctet(data & 0xFF);
     }
   },
   /**
    * Read user data and decode as a UCS2 string.
    *
    * @param numOctets
    *        Number of octets to be read as UCS2 string.
    *
    * @return a string.
    */
   readUCS2String: function(numOctets) {
     let str = "";
     let length = numOctets / 2;
     for (let i = 0; i < length; ++i) {
       let code = (this.readHexOctet() << 8) | this.readHexOctet();
       str += String.fromCharCode(code);
     }
     if (DEBUG) this.context.debug("Read UCS2 string: " + str);
     return str;
   },
   /**
    * Write user data as a UCS2 string.
    *
    * @param message
    *        Message string to encode as UCS2 in hex-encoded octets.
    */
   writeUCS2String: function(message) {
     for (let i = 0; i < message.length; ++i) {
       let code = message.charCodeAt(i);
       this.writeHexOctet((code >> 8) & 0xFF);
       this.writeHexOctet(code & 0xFF);
     }
   },
   /**
    * Read 1 + UDHL octets and construct user data header.
    *
    * @param msg
    *        message object for output.
    *
    * @see 3GPP TS 23.040 9.2.3.24
    */
   readUserDataHeader: function(msg) {
     /**
      * A header object with properties contained in received message.
      * The properties set include:
      *
      * length: totoal length of the header, default 0.
      * langIndex: used locking shift table index, default
      * PDU_NL_IDENTIFIER_DEFAULT.
      * langShiftIndex: used locking shift table index, default
      * PDU_NL_IDENTIFIER_DEFAULT.
      *
      */
     let header = {
       length: 0,
       langIndex: PDU_NL_IDENTIFIER_DEFAULT,
       langShiftIndex: PDU_NL_IDENTIFIER_DEFAULT
     };
     header.length = this.readHexOctet();
     if (DEBUG) this.context.debug("Read UDH length: " + header.length);
     let dataAvailable = header.length;
     while (dataAvailable >= 2) {
       let id = this.readHexOctet();
       let length = this.readHexOctet();
       if (DEBUG) this.context.debug("Read UDH id: " + id + ", length: " + length);
       dataAvailable -= 2;
       switch (id) {
         case PDU_IEI_CONCATENATED_SHORT_MESSAGES_8BIT: {
           let ref = this.readHexOctet();
           let max = this.readHexOctet();
           let seq = this.readHexOctet();
           dataAvailable -= 3;
           if (max && seq && (seq <= max)) {
             header.segmentRef = ref;
             header.segmentMaxSeq = max;
             header.segmentSeq = seq;
           }
           break;
         }
         case PDU_IEI_APPLICATION_PORT_ADDRESSING_SCHEME_8BIT: {
           let dstp = this.readHexOctet();
           let orip = this.readHexOctet();
           dataAvailable -= 2;
           if ((dstp < PDU_APA_RESERVED_8BIT_PORTS)
               || (orip < PDU_APA_RESERVED_8BIT_PORTS)) {
             // 3GPP TS 23.040 clause 9.2.3.24.3: "A receiving entity shall
             // ignore any information element where the value of the
             // Information-Element-Data is Reserved or not supported"
             break;
           }
           header.destinationPort = dstp;
           header.originatorPort = orip;
           break;
         }
         case PDU_IEI_APPLICATION_PORT_ADDRESSING_SCHEME_16BIT: {
           let dstp = (this.readHexOctet() << 8) | this.readHexOctet();
           let orip = (this.readHexOctet() << 8) | this.readHexOctet();
           dataAvailable -= 4;
           // 3GPP TS 23.040 clause 9.2.3.24.4: "A receiving entity shall
           // ignore any information element where the value of the
           // Information-Element-Data is Reserved or not supported"
           if ((dstp < PDU_APA_VALID_16BIT_PORTS)
               && (orip < PDU_APA_VALID_16BIT_PORTS)) {
             header.destinationPort = dstp;
             header.originatorPort = orip;
           }
           break;
         }
         case PDU_IEI_CONCATENATED_SHORT_MESSAGES_16BIT: {
           let ref = (this.readHexOctet() << 8) | this.readHexOctet();
           let max = this.readHexOctet();
           let seq = this.readHexOctet();
           dataAvailable -= 4;
           if (max && seq && (seq <= max)) {
             header.segmentRef = ref;
             header.segmentMaxSeq = max;
             header.segmentSeq = seq;
           }
           break;
         }
         case PDU_IEI_NATIONAL_LANGUAGE_SINGLE_SHIFT:
           let langShiftIndex = this.readHexOctet();
           --dataAvailable;
           if (langShiftIndex < PDU_NL_SINGLE_SHIFT_TABLES.length) {
             header.langShiftIndex = langShiftIndex;
           }
           break;
         case PDU_IEI_NATIONAL_LANGUAGE_LOCKING_SHIFT:
           let langIndex = this.readHexOctet();
           --dataAvailable;
           if (langIndex < PDU_NL_LOCKING_SHIFT_TABLES.length) {
             header.langIndex = langIndex;
           }
           break;
         case PDU_IEI_SPECIAL_SMS_MESSAGE_INDICATION:
           let msgInd = this.readHexOctet() & 0xFF;
           let msgCount = this.readHexOctet();
           dataAvailable -= 2;
           /*
            * TS 23.040 V6.8.1 Sec 9.2.3.24.2
            * bits 1 0   : basic message indication type
            * bits 4 3 2 : extended message indication type
            * bits 6 5   : Profile id
            * bit  7     : storage type
            */
           let storeType = msgInd & PDU_MWI_STORE_TYPE_BIT;
           let mwi = msg.mwi;
           if (!mwi) {
             mwi = msg.mwi = {};
           }
           if (storeType == PDU_MWI_STORE_TYPE_STORE) {
             // Store message because TP_UDH indicates so, note this may override
             // the setting in DCS, but that is expected
             mwi.discard = false;
           } else if (mwi.discard === undefined) {
             // storeType == PDU_MWI_STORE_TYPE_DISCARD
             // only override mwi.discard here if it hasn't already been set
             mwi.discard = true;
           }
           mwi.msgCount = msgCount & 0xFF;
           mwi.active = mwi.msgCount > 0;
           if (DEBUG) {
             this.context.debug("MWI in TP_UDH received: " + JSON.stringify(mwi));
           }
           break;
         default:
           if (DEBUG) {
             this.context.debug("readUserDataHeader: unsupported IEI(" + id +
                                "), " + length + " bytes.");
           }
           // Read out unsupported data
           if (length) {
             let octets;
             if (DEBUG) octets = new Uint8Array(length);
             for (let i = 0; i < length; i++) {
               let octet = this.readHexOctet();
               if (DEBUG) octets[i] = octet;
             }
             dataAvailable -= length;
             if (DEBUG) {
               this.context.debug("readUserDataHeader: " + Array.slice(octets));
             }
           }
           break;
       }
     }
     if (dataAvailable !== 0) {
       throw new Error("Illegal user data header found!");
     }
     msg.header = header;
   },
   /**
    * Write out user data header.
    *
    * @param options
    *        Options containing information for user data header write-out. The
    *        `userDataHeaderLength` property must be correctly pre-calculated.
    */
   writeUserDataHeader: function(options) {
     this.writeHexOctet(options.userDataHeaderLength);
     if (options.segmentMaxSeq > 1) {
       if (options.segmentRef16Bit) {
         this.writeHexOctet(PDU_IEI_CONCATENATED_SHORT_MESSAGES_16BIT);
         this.writeHexOctet(4);
         this.writeHexOctet((options.segmentRef >> 8) & 0xFF);
       } else {
         this.writeHexOctet(PDU_IEI_CONCATENATED_SHORT_MESSAGES_8BIT);
         this.writeHexOctet(3);
       }
       this.writeHexOctet(options.segmentRef & 0xFF);
       this.writeHexOctet(options.segmentMaxSeq & 0xFF);
       this.writeHexOctet(options.segmentSeq & 0xFF);
     }
     if (options.dcs == PDU_DCS_MSG_CODING_7BITS_ALPHABET) {
       if (options.langIndex != PDU_NL_IDENTIFIER_DEFAULT) {
         this.writeHexOctet(PDU_IEI_NATIONAL_LANGUAGE_LOCKING_SHIFT);
         this.writeHexOctet(1);
         this.writeHexOctet(options.langIndex);
       }
       if (options.langShiftIndex != PDU_NL_IDENTIFIER_DEFAULT) {
         this.writeHexOctet(PDU_IEI_NATIONAL_LANGUAGE_SINGLE_SHIFT);
         this.writeHexOctet(1);
         this.writeHexOctet(options.langShiftIndex);
       }
     }
   },
   /**
    * Read SM-TL Address.
    *
    * @param len
    *        Length of useful semi-octets within the Address-Value field. For
    *        example, the lenth of "12345" should be 5, and 4 for "1234".
    *
    * @see 3GPP TS 23.040 9.1.2.5
    */
   readAddress: function(len) {
     // Address Length
     if (!len || (len < 0)) {
       if (DEBUG) {
         this.context.debug("PDU error: invalid sender address length: " + len);
       }
       return null;
     }
     if (len % 2 == 1) {
       len += 1;
     }
     if (DEBUG) this.context.debug("PDU: Going to read address: " + len);
     // Type-of-Address
     let toa = this.readHexOctet();
     let addr = "";
     if ((toa & 0xF0) == PDU_TOA_ALPHANUMERIC) {
       addr = this.readSeptetsToString(Math.floor(len * 4 / 7), 0,
           PDU_NL_IDENTIFIER_DEFAULT , PDU_NL_IDENTIFIER_DEFAULT );
       return addr;
     }
     addr = this.readSwappedNibbleBcdString(len / 2);
     if (addr.length <= 0) {
       if (DEBUG) this.context.debug("PDU error: no number provided");
       return null;
     }
     if ((toa & 0xF0) == (PDU_TOA_INTERNATIONAL)) {
       addr = '+' + addr;
     }
     return addr;
   },
   /**
    * Read TP-Protocol-Indicator(TP-PID).
    *
    * @param msg
    *        message object for output.
    *
    * @see 3GPP TS 23.040 9.2.3.9
    */
   readProtocolIndicator: function(msg) {
     // `The MS shall interpret reserved, obsolete, or unsupported values as the
     // value 00000000 but shall store them exactly as received.`
     msg.pid = this.readHexOctet();
     msg.epid = msg.pid;
     switch (msg.epid & 0xC0) {
       case 0x40:
         // Bit 7..0 = 01xxxxxx
         switch (msg.epid) {
           case PDU_PID_SHORT_MESSAGE_TYPE_0:
           case PDU_PID_ANSI_136_R_DATA:
           case PDU_PID_USIM_DATA_DOWNLOAD:
             return;
         }
         break;
     }
     msg.epid = PDU_PID_DEFAULT;
   },
   /**
    * Read TP-Data-Coding-Scheme(TP-DCS)
    *
    * @param msg
    *        message object for output.
    *
    * @see 3GPP TS 23.040 9.2.3.10, 3GPP TS 23.038 4.
    */
   readDataCodingScheme: function(msg) {
     let dcs = this.readHexOctet();
     if (DEBUG) this.context.debug("PDU: read SMS dcs: " + dcs);
     // No message class by default.
     let messageClass = PDU_DCS_MSG_CLASS_NORMAL;
     // 7 bit is the default fallback encoding.
     let encoding = PDU_DCS_MSG_CODING_7BITS_ALPHABET;
     switch (dcs & PDU_DCS_CODING_GROUP_BITS) {
       case 0x40: // bits 7..4 = 01xx
       case 0x50:
       case 0x60:
       case 0x70:
         // Bit 5..0 are coded exactly the same as Group 00xx
       case 0x00: // bits 7..4 = 00xx
       case 0x10:
       case 0x20:
       case 0x30:
         if (dcs & 0x10) {
           messageClass = dcs & PDU_DCS_MSG_CLASS_BITS;
         }
         switch (dcs & 0x0C) {
           case 0x4:
             encoding = PDU_DCS_MSG_CODING_8BITS_ALPHABET;
             break;
           case 0x8:
             encoding = PDU_DCS_MSG_CODING_16BITS_ALPHABET;
             break;
         }
         break;
       case 0xE0: // bits 7..4 = 1110
         encoding = PDU_DCS_MSG_CODING_16BITS_ALPHABET;
         // Bit 3..0 are coded exactly the same as Message Waiting Indication
         // Group 1101.
         // Fall through.
       case 0xC0: // bits 7..4 = 1100
       case 0xD0: // bits 7..4 = 1101
         // Indiciates voicemail indicator set or clear
         let active = (dcs & PDU_DCS_MWI_ACTIVE_BITS) == PDU_DCS_MWI_ACTIVE_VALUE;
         // If TP-UDH is present, these values will be overwritten
         switch (dcs & PDU_DCS_MWI_TYPE_BITS) {
           case PDU_DCS_MWI_TYPE_VOICEMAIL:
             let mwi = msg.mwi;
             if (!mwi) {
               mwi = msg.mwi = {};
             }
             mwi.active = active;
             mwi.discard = (dcs & PDU_DCS_CODING_GROUP_BITS) == 0xC0;
             mwi.msgCount = active ? GECKO_VOICEMAIL_MESSAGE_COUNT_UNKNOWN : 0;
             if (DEBUG) {
               this.context.debug("MWI in DCS received for voicemail: " +
                                  JSON.stringify(mwi));
             }
             break;
           case PDU_DCS_MWI_TYPE_FAX:
             if (DEBUG) this.context.debug("MWI in DCS received for fax");
             break;
           case PDU_DCS_MWI_TYPE_EMAIL:
             if (DEBUG) this.context.debug("MWI in DCS received for email");
             break;
           default:
             if (DEBUG) this.context.debug("MWI in DCS received for \"other\"");
             break;
         }
         break;
       case 0xF0: // bits 7..4 = 1111
         if (dcs & 0x04) {
           encoding = PDU_DCS_MSG_CODING_8BITS_ALPHABET;
         }
         messageClass = dcs & PDU_DCS_MSG_CLASS_BITS;
         break;
       default:
         // Falling back to default encoding.
         break;
     }
     msg.dcs = dcs;
     msg.encoding = encoding;
     msg.messageClass = GECKO_SMS_MESSAGE_CLASSES[messageClass];
     if (DEBUG) this.context.debug("PDU: message encoding is " + encoding + " bit.");
   },
   /**
    * Read GSM TP-Service-Centre-Time-Stamp(TP-SCTS).
    *
    * @see 3GPP TS 23.040 9.2.3.11
    */
   readTimestamp: function() {
     let year   = this.readSwappedNibbleBcdNum(1) + PDU_TIMESTAMP_YEAR_OFFSET;
     let month  = this.readSwappedNibbleBcdNum(1) - 1;
     let day    = this.readSwappedNibbleBcdNum(1);
     let hour   = this.readSwappedNibbleBcdNum(1);
     let minute = this.readSwappedNibbleBcdNum(1);
     let second = this.readSwappedNibbleBcdNum(1);
     let timestamp = Date.UTC(year, month, day, hour, minute, second);
     // If the most significant bit of the least significant nibble is 1,
     // the timezone offset is negative (fourth bit from the right => 0x08):
     //   localtime = UTC + tzOffset
     // therefore
     //   UTC = localtime - tzOffset
     let tzOctet = this.readHexOctet();
     let tzOffset = this.octetToBCD(tzOctet & ~0x08) * 15 * 60 * 1000;
     tzOffset = (tzOctet & 0x08) ? -tzOffset : tzOffset;
     timestamp -= tzOffset;
     return timestamp;
   },
   /**
    * Write GSM TP-Service-Centre-Time-Stamp(TP-SCTS).
    *
    * @see 3GPP TS 23.040 9.2.3.11
    */
   writeTimestamp: function(date) {
     this.writeSwappedNibbleBCDNum(date.getFullYear() - PDU_TIMESTAMP_YEAR_OFFSET);
     // The value returned by getMonth() is an integer between 0 and 11.
     // 0 is corresponds to January, 1 to February, and so on.
     this.writeSwappedNibbleBCDNum(date.getMonth() + 1);
     this.writeSwappedNibbleBCDNum(date.getDate());
     this.writeSwappedNibbleBCDNum(date.getHours());
     this.writeSwappedNibbleBCDNum(date.getMinutes());
     this.writeSwappedNibbleBCDNum(date.getSeconds());
     // the value returned by getTimezoneOffset() is the difference,
     // in minutes, between UTC and local time.
     // For example, if your time zone is UTC+10 (Australian Eastern Standard Time),
     // -600 will be returned.
     // In TS 23.040 9.2.3.11, the Time Zone field of TP-SCTS indicates
     // the different between the local time and GMT.
     // And expressed in quarters of an hours. (so need to divid by 15)
     let zone = date.getTimezoneOffset() / 15;
     let octet = this.BCDToOctet(zone);
     // the bit3 of the Time Zone field represents the algebraic sign.
     // (0: positive, 1: negative).
     // For example, if the time zone is -0800 GMT,
     // 480 will be returned by getTimezoneOffset().
     // In this case, need to mark sign bit as 1. => 0x08
     if (zone > 0) {
       octet = octet | 0x08;
     }
     this.writeHexOctet(octet);
   },
   /**
    * User data can be 7 bit (default alphabet) data, 8 bit data, or 16 bit
    * (UCS2) data.
    *
    * @param msg
    *        message object for output.
    * @param length
    *        length of user data to read in octets.
    */
   readUserData: function(msg, length) {
     if (DEBUG) {
       this.context.debug("Reading " + length + " bytes of user data.");
     }
     let paddingBits = 0;
     if (msg.udhi) {
       this.readUserDataHeader(msg);
       if (msg.encoding == PDU_DCS_MSG_CODING_7BITS_ALPHABET) {
         let headerBits = (msg.header.length + 1) * 8;
         let headerSeptets = Math.ceil(headerBits / 7);
         length -= headerSeptets;
         paddingBits = headerSeptets * 7 - headerBits;
       } else {
         length -= (msg.header.length + 1);
       }
     }
     if (DEBUG) {
       this.context.debug("After header, " + length + " septets left of user data");
     }
     msg.body = null;
     msg.data = null;
     switch (msg.encoding) {
       case PDU_DCS_MSG_CODING_7BITS_ALPHABET:
         // 7 bit encoding allows 140 octets, which means 160 characters
         // ((140x8) / 7 = 160 chars)
         if (length > PDU_MAX_USER_DATA_7BIT) {
           if (DEBUG) {
             this.context.debug("PDU error: user data is too long: " + length);
           }
           break;
         }
         let langIndex = msg.udhi ? msg.header.langIndex : PDU_NL_IDENTIFIER_DEFAULT;
         let langShiftIndex = msg.udhi ? msg.header.langShiftIndex : PDU_NL_IDENTIFIER_DEFAULT;
         msg.body = this.readSeptetsToString(length, paddingBits, langIndex,
                                             langShiftIndex);
         break;
       case PDU_DCS_MSG_CODING_8BITS_ALPHABET:
         msg.data = this.readHexOctetArray(length);
         break;
       case PDU_DCS_MSG_CODING_16BITS_ALPHABET:
         msg.body = this.readUCS2String(length);
         break;
     }
   },
   /**
    * Read extra parameters if TP-PI is set.
    *
    * @param msg
    *        message object for output.
    */
   readExtraParams: function(msg) {
     // Because each PDU octet is converted to two UCS2 char2, we should always
     // get even messageStringLength in this#_processReceivedSms(). So, we'll
     // always need two delimitors at the end.
     if (this.context.Buf.getReadAvailable() <= 4) {
       return;
     }
     // TP-Parameter-Indicator
     let pi;
     do {
       // `The most significant bit in octet 1 and any other TP-PI octets which
       // may be added later is reserved as an extension bit which when set to a
       // 1 shall indicate that another TP-PI octet follows immediately
       // afterwards.` ~ 3GPP TS 23.040 9.2.3.27
       pi = this.readHexOctet();
     } while (pi & PDU_PI_EXTENSION);
     // `If the TP-UDL bit is set to "1" but the TP-DCS bit is set to "0" then
     // the receiving entity shall for TP-DCS assume a value of 0x00, i.e. the
     // 7bit default alphabet.` ~ 3GPP 23.040 9.2.3.27
     msg.dcs = 0;
     msg.encoding = PDU_DCS_MSG_CODING_7BITS_ALPHABET;
     // TP-Protocol-Identifier
     if (pi & PDU_PI_PROTOCOL_IDENTIFIER) {
       this.readProtocolIndicator(msg);
     }
     // TP-Data-Coding-Scheme
     if (pi & PDU_PI_DATA_CODING_SCHEME) {
       this.readDataCodingScheme(msg);
     }
     // TP-User-Data-Length
     if (pi & PDU_PI_USER_DATA_LENGTH) {
       let userDataLength = this.readHexOctet();
       this.readUserData(msg, userDataLength);
     }
   },
   /**
    * Read and decode a PDU-encoded message from the stream.
    *
    * TODO: add some basic sanity checks like:
    * - do we have the minimum number of chars available
    */
   readMessage: function() {
     // An empty message object. This gets filled below and then returned.
     let msg = {
       // D:DELIVER, DR:DELIVER-REPORT, S:SUBMIT, SR:SUBMIT-REPORT,
       // ST:STATUS-REPORT, C:COMMAND
       // M:Mandatory, O:Optional, X:Unavailable
       //                          D  DR S  SR ST C
       SMSC:              null, // M  M  M  M  M  M
       mti:               null, // M  M  M  M  M  M
       udhi:              null, // M  M  O  M  M  M
       sender:            null, // M  X  X  X  X  X
       recipient:         null, // X  X  M  X  M  M
       pid:               null, // M  O  M  O  O  M
       epid:              null, // M  O  M  O  O  M
       dcs:               null, // M  O  M  O  O  X
       mwi:               null, // O  O  O  O  O  O
       replace:          false, // O  O  O  O  O  O
       header:            null, // M  M  O  M  M  M
       body:              null, // M  O  M  O  O  O
       data:              null, // M  O  M  O  O  O
       sentTimestamp:     null, // M  X  X  X  X  X
       status:            null, // X  X  X  X  M  X
       scts:              null, // X  X  X  M  M  X
       dt:                null, // X  X  X  X  M  X
     };
     // SMSC info
     let smscLength = this.readHexOctet();
     if (smscLength > 0) {
       let smscTypeOfAddress = this.readHexOctet();
       // Subtract the type-of-address octet we just read from the length.
       msg.SMSC = this.readSwappedNibbleBcdString(smscLength - 1);
       if ((smscTypeOfAddress >> 4) == (PDU_TOA_INTERNATIONAL >> 4)) {
         msg.SMSC = '+' + msg.SMSC;
       }
     }
     // First octet of this SMS-DELIVER or SMS-SUBMIT message
     let firstOctet = this.readHexOctet();
     // Message Type Indicator
     msg.mti = firstOctet & 0x03;
     // User data header indicator
     msg.udhi = firstOctet & PDU_UDHI;
     switch (msg.mti) {
       case PDU_MTI_SMS_RESERVED:
         // `If an MS receives a TPDU with a "Reserved" value in the TP-MTI it
         // shall process the message as if it were an "SMS-DELIVER" but store
         // the message exactly as received.` ~ 3GPP TS 23.040 9.2.3.1
       case PDU_MTI_SMS_DELIVER:
         return this.readDeliverMessage(msg);
       case PDU_MTI_SMS_STATUS_REPORT:
         return this.readStatusReportMessage(msg);
       default:
         return null;
     }
   },
   /**
    * Helper for processing received SMS parcel data.
    *
    * @param length
    *        Length of SMS string in the incoming parcel.
    *
    * @return Message parsed or null for invalid message.
    */
   processReceivedSms: function(length) {
     if (!length) {
       if (DEBUG) this.context.debug("Received empty SMS!");
       return [null, PDU_FCS_UNSPECIFIED];
     }
     let Buf = this.context.Buf;
     // An SMS is a string, but we won't read it as such, so let's read the
     // string length and then defer to PDU parsing helper.
     let messageStringLength = Buf.readInt32();
     if (DEBUG) this.context.debug("Got new SMS, length " + messageStringLength);
     let message = this.readMessage();
     if (DEBUG) this.context.debug("Got new SMS: " + JSON.stringify(message));
     // Read string delimiters. See Buf.readString().
     Buf.readStringDelimiter(length);
     // Determine result
     if (!message) {
       return [null, PDU_FCS_UNSPECIFIED];
     }
     if (message.epid == PDU_PID_SHORT_MESSAGE_TYPE_0) {
       // `A short message type 0 indicates that the ME must acknowledge receipt
       // of the short message but shall discard its contents.` ~ 3GPP TS 23.040
       // 9.2.3.9
       return [null, PDU_FCS_OK];
     }
     if (message.messageClass == GECKO_SMS_MESSAGE_CLASSES[PDU_DCS_MSG_CLASS_2]) {
       let RIL = this.context.RIL;
       switch (message.epid) {
         case PDU_PID_ANSI_136_R_DATA:
         case PDU_PID_USIM_DATA_DOWNLOAD:
           let ICCUtilsHelper = this.context.ICCUtilsHelper;
           if (ICCUtilsHelper.isICCServiceAvailable("DATA_DOWNLOAD_SMS_PP")) {
             // `If the service "data download via SMS Point-to-Point" is
             // allocated and activated in the (U)SIM Service Table, ... then the
             // ME shall pass the message transparently to the UICC using the
             // ENVELOPE (SMS-PP DOWNLOAD).` ~ 3GPP TS 31.111 7.1.1.1
             RIL.dataDownloadViaSMSPP(message);
             // `the ME shall not display the message, or alert the user of a
             // short message waiting.` ~ 3GPP TS 31.111 7.1.1.1
             return [null, PDU_FCS_RESERVED];
           }
           // If the service "data download via SMS-PP" is not available in the
           // (U)SIM Service Table, ..., then the ME shall store the message in
           // EFsms in accordance with TS 31.102` ~ 3GPP TS 31.111 7.1.1.1
           // Fall through.
         default:
           RIL.writeSmsToSIM(message);
           break;
       }
     }
     // TODO: Bug 739143: B2G SMS: Support SMS Storage Full event
     if ((message.messageClass != GECKO_SMS_MESSAGE_CLASSES[PDU_DCS_MSG_CLASS_0]) && !true) {
       // `When a mobile terminated message is class 0..., the MS shall display
       // the message immediately and send a ACK to the SC ..., irrespective of
       // whether there is memory available in the (U)SIM or ME.` ~ 3GPP 23.038
       // clause 4.
       if (message.messageClass == GECKO_SMS_MESSAGE_CLASSES[PDU_DCS_MSG_CLASS_2]) {
         // `If all the short message storage at the MS is already in use, the
         // MS shall return "memory capacity exceeded".` ~ 3GPP 23.038 clause 4.
         return [null, PDU_FCS_MEMORY_CAPACITY_EXCEEDED];
       }
       return [null, PDU_FCS_UNSPECIFIED];
     }
     return [message, PDU_FCS_OK];
   },
   /**
    * Read and decode a SMS-DELIVER PDU.
    *
    * @param msg
    *        message object for output.
    */
   readDeliverMessage: function(msg) {
     // - Sender Address info -
     let senderAddressLength = this.readHexOctet();
     msg.sender = this.readAddress(senderAddressLength);
     // - TP-Protocolo-Identifier -
     this.readProtocolIndicator(msg);
     // - TP-Data-Coding-Scheme -
     this.readDataCodingScheme(msg);
     // - TP-Service-Center-Time-Stamp -
     msg.sentTimestamp = this.readTimestamp();
     // - TP-User-Data-Length -
     let userDataLength = this.readHexOctet();
     // - TP-User-Data -
     if (userDataLength > 0) {
       this.readUserData(msg, userDataLength);
     }
     return msg;
   },
   /**
    * Read and decode a SMS-STATUS-REPORT PDU.
    *
    * @param msg
    *        message object for output.
    */
   readStatusReportMessage: function(msg) {
     // TP-Message-Reference
     msg.messageRef = this.readHexOctet();
     // TP-Recipient-Address
     let recipientAddressLength = this.readHexOctet();
     msg.recipient = this.readAddress(recipientAddressLength);
     // TP-Service-Centre-Time-Stamp
     msg.scts = this.readTimestamp();
     // TP-Discharge-Time
     msg.dt = this.readTimestamp();
     // TP-Status
     msg.status = this.readHexOctet();
     this.readExtraParams(msg);
     return msg;
   },
   /**
    * Serialize a SMS-SUBMIT PDU message and write it to the output stream.
    *
    * This method expects that a data coding scheme has been chosen already
    * and that the length of the user data payload in that encoding is known,
    * too. Both go hand in hand together anyway.
    *
    * @param address
    *        String containing the address (number) of the SMS receiver
    * @param userData
    *        String containing the message to be sent as user data
    * @param dcs
    *        Data coding scheme. One of the PDU_DCS_MSG_CODING_*BITS_ALPHABET
    *        constants.
    * @param userDataHeaderLength
    *        Length of embedded user data header, in bytes. The whole header
    *        size will be userDataHeaderLength + 1; 0 for no header.
    * @param encodedBodyLength
    *        Length of the user data when encoded with the given DCS. For UCS2,
    *        in bytes; for 7-bit, in septets.
    * @param langIndex
    *        Table index used for normal 7-bit encoded character lookup.
    * @param langShiftIndex
    *        Table index used for escaped 7-bit encoded character lookup.
    * @param requestStatusReport
    *        Request status report.
    */
   writeMessage: function(options) {
     if (DEBUG) {
       this.context.debug("writeMessage: " + JSON.stringify(options));
     }
     let Buf = this.context.Buf;
     let address = options.number;
     let body = options.body;
     let dcs = options.dcs;
     let userDataHeaderLength = options.userDataHeaderLength;
     let encodedBodyLength = options.encodedBodyLength;
     let langIndex = options.langIndex;
     let langShiftIndex = options.langShiftIndex;
     // SMS-SUBMIT Format:
     //
     // PDU Type - 1 octet
     // Message Reference - 1 octet
     // DA - Destination Address - 2 to 12 octets
     // PID - Protocol Identifier - 1 octet
     // DCS - Data Coding Scheme - 1 octet
     // VP - Validity Period - 0, 1 or 7 octets
     // UDL - User Data Length - 1 octet
     // UD - User Data - 140 octets
     let addressFormat = PDU_TOA_ISDN; // 81
     if (address[0] == '+') {
       addressFormat = PDU_TOA_INTERNATIONAL | PDU_TOA_ISDN; // 91
       address = address.substring(1);
     }
     //TODO validity is unsupported for now
     let validity = 0;
     let headerOctets = (userDataHeaderLength ? userDataHeaderLength + 1 : 0);
     let paddingBits;
     let userDataLengthInSeptets;
     let userDataLengthInOctets;
     if (dcs == PDU_DCS_MSG_CODING_7BITS_ALPHABET) {
       let headerSeptets = Math.ceil(headerOctets * 8 / 7);
       userDataLengthInSeptets = headerSeptets + encodedBodyLength;
       userDataLengthInOctets = Math.ceil(userDataLengthInSeptets * 7 / 8);
       paddingBits = headerSeptets * 7 - headerOctets * 8;
     } else {
       userDataLengthInOctets = headerOctets + encodedBodyLength;
       paddingBits = 0;
     }
     let pduOctetLength = 4 + // PDU Type, Message Ref, address length + format
                          Math.ceil(address.length / 2) +
 + // PID, DCS, UDL
                          userDataLengthInOctets;
     if (validity) {
       //TODO: add more to pduOctetLength
     }
     // Start the string. Since octets are represented in hex, we will need
     // twice as many characters as octets.
     Buf.writeInt32(pduOctetLength * 2);
     // - PDU-TYPE-
     // +--------+----------+---------+---------+--------+---------+
     // | RP (1) | UDHI (1) | SRR (1) | VPF (2) | RD (1) | MTI (2) |
     // +--------+----------+---------+---------+--------+---------+
     // RP:    0   Reply path parameter is not set
     //        1   Reply path parameter is set
     // UDHI:  0   The UD Field contains only the short message
     //        1   The beginning of the UD field contains a header in addition
     //            of the short message
     // SRR:   0   A status report is not requested
     //        1   A status report is requested
     // VPF:   bit4  bit3
     //        0     0     VP field is not present
     //        0     1     Reserved
     //        1     0     VP field present an integer represented (relative)
     //        1     1     VP field present a semi-octet represented (absolute)
     // RD:        Instruct the SMSC to accept(0) or reject(1) an SMS-SUBMIT
     //            for a short message still held in the SMSC which has the same
     //            MR and DA as a previously submitted short message from the
     //            same OA
     // MTI:   bit1  bit0    Message Type
     //        0     0       SMS-DELIVER (SMSC ==> MS)
     //        0     1       SMS-SUBMIT (MS ==> SMSC)
     // PDU type. MTI is set to SMS-SUBMIT
     let firstOctet = PDU_MTI_SMS_SUBMIT;
     // Status-Report-Request
     if (options.requestStatusReport) {
       firstOctet |= PDU_SRI_SRR;
     }
     // Validity period
     if (validity) {
       //TODO: not supported yet, OR with one of PDU_VPF_*
     }
     // User data header indicator
     if (headerOctets) {
       firstOctet |= PDU_UDHI;
     }
     this.writeHexOctet(firstOctet);
     // Message reference 00
     this.writeHexOctet(0x00);
     // - Destination Address -
     this.writeHexOctet(address.length);
     this.writeHexOctet(addressFormat);
     this.writeSwappedNibbleBCD(address);
     // - Protocol Identifier -
     this.writeHexOctet(0x00);
     // - Data coding scheme -
     // For now it assumes bits 7..4 = 1111 except for the 16 bits use case
     this.writeHexOctet(dcs);
     // - Validity Period -
     if (validity) {
       this.writeHexOctet(validity);
     }
     // - User Data -
     if (dcs == PDU_DCS_MSG_CODING_7BITS_ALPHABET) {
       this.writeHexOctet(userDataLengthInSeptets);
     } else {
       this.writeHexOctet(userDataLengthInOctets);
     }
     if (headerOctets) {
       this.writeUserDataHeader(options);
     }
     switch (dcs) {
       case PDU_DCS_MSG_CODING_7BITS_ALPHABET:
         this.writeStringAsSeptets(body, paddingBits, langIndex, langShiftIndex);
         break;
       case PDU_DCS_MSG_CODING_8BITS_ALPHABET:
         // Unsupported.
         break;
       case PDU_DCS_MSG_CODING_16BITS_ALPHABET:
         this.writeUCS2String(body);
         break;
     }
     // End of the string. The string length is always even by definition, so
     // we write two \0 delimiters.
     Buf.writeUint16(0);
     Buf.writeUint16(0);
   },
   /**
    * Read GSM CBS message serial number.
    *
    * @param msg
    *        message object for output.
    *
    * @see 3GPP TS 23.041 section 9.4.1.2.1
    */
   readCbSerialNumber: function(msg) {
     let Buf = this.context.Buf;
     msg.serial = Buf.readUint8() << 8 | Buf.readUint8();
     msg.geographicalScope = (msg.serial >>> 14) & 0x03;
     msg.messageCode = (msg.serial >>> 4) & 0x03FF;
     msg.updateNumber = msg.serial & 0x0F;
   },
   /**
    * Read GSM CBS message message identifier.
    *
    * @param msg
    *        message object for output.
    *
    * @see 3GPP TS 23.041 section 9.4.1.2.2
    */
   readCbMessageIdentifier: function(msg) {
     let Buf = this.context.Buf;
     msg.messageId = Buf.readUint8() << 8 | Buf.readUint8();
     if ((msg.format != CB_FORMAT_ETWS)
         && (msg.messageId >= CB_GSM_MESSAGEID_ETWS_BEGIN)
         && (msg.messageId <= CB_GSM_MESSAGEID_ETWS_END)) {
       // `In the case of transmitting CBS message for ETWS, a part of
       // Message Code can be used to command mobile terminals to activate
       // emergency user alert and message popup in order to alert the users.`
       msg.etws = {
         emergencyUserAlert: msg.messageCode & 0x0200 ? true : false,
         popup:              msg.messageCode & 0x0100 ? true : false
       };
       let warningType = msg.messageId - CB_GSM_MESSAGEID_ETWS_BEGIN;
       if (warningType < CB_ETWS_WARNING_TYPE_NAMES.length) {
         msg.etws.warningType = warningType;
       }
     }
   },
   /**
    * Read CBS Data Coding Scheme.
    *
    * @param msg
    *        message object for output.
    *
    * @see 3GPP TS 23.038 section 5.
    */
   readCbDataCodingScheme: function(msg) {
     let dcs = this.context.Buf.readUint8();
     if (DEBUG) this.context.debug("PDU: read CBS dcs: " + dcs);
     let language = null, hasLanguageIndicator = false;
     // `Any reserved codings shall be assumed to be the GSM 7bit default
     // alphabet.`
     let encoding = PDU_DCS_MSG_CODING_7BITS_ALPHABET;
     let messageClass = PDU_DCS_MSG_CLASS_NORMAL;
     switch (dcs & PDU_DCS_CODING_GROUP_BITS) {
       case 0x00: // 0000
         language = CB_DCS_LANG_GROUP_1[dcs & 0x0F];
         break;
       case 0x10: // 0001
         switch (dcs & 0x0F) {
           case 0x00:
             hasLanguageIndicator = true;
             break;
           case 0x01:
             encoding = PDU_DCS_MSG_CODING_16BITS_ALPHABET;
             hasLanguageIndicator = true;
             break;
         }
         break;
       case 0x20: // 0010
         language = CB_DCS_LANG_GROUP_2[dcs & 0x0F];
         break;
       case 0x40: // 01xx
       case 0x50:
       //case 0x60: Text Compression, not supported
       //case 0x70: Text Compression, not supported
       case 0x90: // 1001
         encoding = (dcs & 0x0C);
         if (encoding == 0x0C) {
           encoding = PDU_DCS_MSG_CODING_7BITS_ALPHABET;
         }
         messageClass = (dcs & PDU_DCS_MSG_CLASS_BITS);
         break;
       case 0xF0:
         encoding = (dcs & 0x04) ? PDU_DCS_MSG_CODING_8BITS_ALPHABET
                                 : PDU_DCS_MSG_CODING_7BITS_ALPHABET;
         switch(dcs & PDU_DCS_MSG_CLASS_BITS) {
           case 0x01: messageClass = PDU_DCS_MSG_CLASS_USER_1; break;
           case 0x02: messageClass = PDU_DCS_MSG_CLASS_USER_2; break;
           case 0x03: messageClass = PDU_DCS_MSG_CLASS_3; break;
         }
         break;
       case 0x30: // 0011 (Reserved)
       case 0x80: // 1000 (Reserved)
       case 0xA0: // 1010..1100 (Reserved)
       case 0xB0:
       case 0xC0:
         break;
       default:
         throw new Error("Unsupported CBS data coding scheme: " + dcs);
     }
     msg.dcs = dcs;
     msg.encoding = encoding;
     msg.language = language;
     msg.messageClass = GECKO_SMS_MESSAGE_CLASSES[messageClass];
     msg.hasLanguageIndicator = hasLanguageIndicator;
   },
   /**
    * Read GSM CBS message page parameter.
    *
    * @param msg
    *        message object for output.
    *
    * @see 3GPP TS 23.041 section 9.4.1.2.4
    */
   readCbPageParameter: function(msg) {
     let octet = this.context.Buf.readUint8();
     msg.pageIndex = (octet >>> 4) & 0x0F;
     msg.numPages = octet & 0x0F;
     if (!msg.pageIndex || !msg.numPages) {
       // `If a mobile receives the code 0000 in either the first field or the
       // second field then it shall treat the CBS message exactly the same as a
       // CBS message with page parameter 0001 0001 (i.e. a single page message).`
       msg.pageIndex = msg.numPages = 1;
     }
   },
   /**
    * Read ETWS Primary Notification message warning type.
    *
    * @param msg
    *        message object for output.
    *
    * @see 3GPP TS 23.041 section 9.3.24
    */
   readCbWarningType: function(msg) {
     let Buf = this.context.Buf;
     let word = Buf.readUint8() << 8 | Buf.readUint8();
     msg.etws = {
       warningType:        (word >>> 9) & 0x7F,
       popup:              word & 0x80 ? true : false,
       emergencyUserAlert: word & 0x100 ? true : false
     };
   },
   /**
    * Read CBS-Message-Information-Page
    *
    * @param msg
    *        message object for output.
    * @param length
    *        length of cell broadcast data to read in octets.
    *
    * @see 3GPP TS 23.041 section 9.3.19
    */
   readGsmCbData: function(msg, length) {
     let Buf = this.context.Buf;
     let bufAdapter = {
       context: this.context,
       readHexOctet: function() {
         return Buf.readUint8();
       }
     };
     msg.body = null;
     msg.data = null;
     switch (msg.encoding) {
       case PDU_DCS_MSG_CODING_7BITS_ALPHABET:
         msg.body = this.readSeptetsToString.call(bufAdapter,
                                                  (length * 8 / 7), 0,
                                                  PDU_NL_IDENTIFIER_DEFAULT,
                                                  PDU_NL_IDENTIFIER_DEFAULT);
         if (msg.hasLanguageIndicator) {
           msg.language = msg.body.substring(0, 2);
           msg.body = msg.body.substring(3);
         }
         break;
       case PDU_DCS_MSG_CODING_8BITS_ALPHABET:
         msg.data = Buf.readUint8Array(length);
         break;
       case PDU_DCS_MSG_CODING_16BITS_ALPHABET:
         if (msg.hasLanguageIndicator) {
           msg.language = this.readSeptetsToString.call(bufAdapter, 2, 0,
                                                        PDU_NL_IDENTIFIER_DEFAULT,
                                                        PDU_NL_IDENTIFIER_DEFAULT);
           length -= 2;
         }
         msg.body = this.readUCS2String.call(bufAdapter, length);
         break;
     }
   },
   /**
    * Read Cell GSM/ETWS/UMTS Broadcast Message.
    *
    * @param pduLength
    *        total length of the incoming PDU in octets.
    */
   readCbMessage: function(pduLength) {
     // Validity                                                   GSM ETWS UMTS
     let msg = {
       // Internally used in ril_worker:
       serial:               null,                              //  O   O    O
       updateNumber:         null,                              //  O   O    O
       format:               null,                              //  O   O    O
       dcs:                  0x0F,                              //  O   X    O
       encoding:             PDU_DCS_MSG_CODING_7BITS_ALPHABET, //  O   X    O
       hasLanguageIndicator: false,                             //  O   X    O
       data:                 null,                              //  O   X    O
       body:                 null,                              //  O   X    O
       pageIndex:            1,                                 //  O   X    X
       numPages:             1,                                 //  O   X    X
       // DOM attributes:
       geographicalScope:    null,                              //  O   O    O
       messageCode:          null,                              //  O   O    O
       messageId:            null,                              //  O   O    O
       language:             null,                              //  O   X    O
       fullBody:             null,                              //  O   X    O
       fullData:             null,                              //  O   X    O
       messageClass:         GECKO_SMS_MESSAGE_CLASSES[PDU_DCS_MSG_CLASS_NORMAL], //  O   x    O
       etws:                 null                               //  ?   O    ?
       /*{
         warningType:        null,                              //  X   O    X
         popup:              false,                             //  X   O    X
         emergencyUserAlert: false,                             //  X   O    X
       }*/
     };
     if (pduLength <= CB_MESSAGE_SIZE_ETWS) {
       msg.format = CB_FORMAT_ETWS;
       return this.readEtwsCbMessage(msg);
     }
     if (pduLength <= CB_MESSAGE_SIZE_GSM) {
       msg.format = CB_FORMAT_GSM;
       return this.readGsmCbMessage(msg, pduLength);
     }
     return null;
   },
   /**
    * Read GSM Cell Broadcast Message.
    *
    * @param msg
    *        message object for output.
    * @param pduLength
    *        total length of the incomint PDU in octets.
    *
    * @see 3GPP TS 23.041 clause 9.4.1.2
    */
   readGsmCbMessage: function(msg, pduLength) {
     this.readCbSerialNumber(msg);
     this.readCbMessageIdentifier(msg);
     this.readCbDataCodingScheme(msg);
     this.readCbPageParameter(msg);
     // GSM CB message header takes 6 octets.
     this.readGsmCbData(msg, pduLength - 6);
     return msg;
   },
   /**
    * Read ETWS Primary Notification Message.
    *
    * @param msg
    *        message object for output.
    *
    * @see 3GPP TS 23.041 clause 9.4.1.3
    */
   readEtwsCbMessage: function(msg) {
     this.readCbSerialNumber(msg);
     this.readCbMessageIdentifier(msg);
     this.readCbWarningType(msg);
     // Octet 7..56 is Warning Security Information. However, according to
     // section 9.4.1.3.6, `The UE shall ignore this parameter.` So we just skip
     // processing it here.
     return msg;
   },
   /**
    * Read network name.
    *
    * @param len Length of the information element.
    * @return
    *   {
    *     networkName: network name.
    *     shouldIncludeCi: Should Country's initials included in text string.
    *   }
    * @see TS 24.008 clause 10.5.3.5a.
    */
   readNetworkName: function(len) {
     // According to TS 24.008 Sec. 10.5.3.5a, the first octet is:
     // bit 8: must be 1.
     // bit 5-7: Text encoding.
     //          000 - GSM default alphabet.
     //          001 - UCS2 (16 bit).
     //          else - reserved.
     // bit 4: MS should add the letters for Country's Initials and a space
     //        to the text string if this bit is true.
     // bit 1-3: number of spare bits in last octet.
     let codingInfo = this.readHexOctet();
     if (!(codingInfo & 0x80)) {
       return null;
     }
     let textEncoding = (codingInfo & 0x70) >> 4;
     let shouldIncludeCountryInitials = !!(codingInfo & 0x08);
     let spareBits = codingInfo & 0x07;
     let resultString;
     switch (textEncoding) {
     case 0:
       // GSM Default alphabet.
       resultString = this.readSeptetsToString(
         ((len - 1) * 8 - spareBits) / 7, 0,
         PDU_NL_IDENTIFIER_DEFAULT,
         PDU_NL_IDENTIFIER_DEFAULT);
       break;
     case 1:
       // UCS2 encoded.
       resultString = this.readUCS2String(len - 1);
       break;
     default:
       // Not an available text coding.
       return null;
     }
     // TODO - Bug 820286: According to shouldIncludeCountryInitials, add
     // country initials to the resulting string.
     return resultString;
   }
 };
 /**
  * Provide buffer with bitwise read/write function so make encoding/decoding easier.
  */
 function BitBufferHelperObject(/* unused */aContext) {
   this.readBuffer = [];
   this.writeBuffer = [];
 }
 BitBufferHelperObject.prototype = {
   readCache: 0,
   readCacheSize: 0,
   readBuffer: null,
   readIndex: 0,
   writeCache: 0,
   writeCacheSize: 0,
   writeBuffer: null,
   // Max length is 32 because we use integer as read/write cache.
   // All read/write functions are implemented based on bitwise operation.
   readBits: function(length) {
     if (length <= 0 || length > 32) {
       return null;
     }
     if (length > this.readCacheSize) {
       let bytesToRead = Math.ceil((length - this.readCacheSize) / 8);
       for(let i = 0; i < bytesToRead; i++) {
         this.readCache = (this.readCache << 8) | (this.readBuffer[this.readIndex++] & 0xFF);
         this.readCacheSize += 8;
       }
     }
     let bitOffset = (this.readCacheSize - length),
         resultMask = (1 << length) - 1,
         result = 0;
     result = (this.readCache >> bitOffset) & resultMask;
     this.readCacheSize -= length;
     return result;
   },
   backwardReadPilot: function(length) {
     if (length <= 0) {
       return;
     }
     // Zero-based position.
     let bitIndexToRead = this.readIndex * 8 - this.readCacheSize - length;
     if (bitIndexToRead < 0) {
       return;
     }
     // Update readIndex, readCache, readCacheSize accordingly.
     let readBits = bitIndexToRead % 8;
     this.readIndex = Math.floor(bitIndexToRead / 8) + ((readBits) ? 1 : 0);
     this.readCache = (readBits) ? this.readBuffer[this.readIndex - 1] : 0;
     this.readCacheSize = (readBits) ? (8 - readBits) : 0;
   },
   writeBits: function(value, length) {
     if (length <= 0 || length > 32) {
       return;
     }
     let totalLength = length + this.writeCacheSize;
     // 8-byte cache not full
     if (totalLength < 8) {
       let valueMask = (1 << length) - 1;
       this.writeCache = (this.writeCache << length) | (value & valueMask);
       this.writeCacheSize += length;
       return;
     }
     // Deal with unaligned part
     if (this.writeCacheSize) {
       let mergeLength = 8 - this.writeCacheSize,
           valueMask = (1 << mergeLength) - 1;
       this.writeCache = (this.writeCache << mergeLength) | ((value >> (length - mergeLength)) & valueMask);
       this.writeBuffer.push(this.writeCache & 0xFF);
       length -= mergeLength;
     }
     // Aligned part, just copy
     while (length >= 8) {
       length -= 8;
       this.writeBuffer.push((value >> length) & 0xFF);
     }
     // Rest part is saved into cache
     this.writeCacheSize = length;
     this.writeCache = value & ((1 << length) - 1);
     return;
   },
   // Drop what still in read cache and goto next 8-byte alignment.
   // There might be a better naming.
   nextOctetAlign: function() {
     this.readCache = 0;
     this.readCacheSize = 0;
   },
   // Flush current write cache to Buf with padding 0s.
   // There might be a better naming.
   flushWithPadding: function() {
     if (this.writeCacheSize) {
       this.writeBuffer.push(this.writeCache << (8 - this.writeCacheSize));
     }
     this.writeCache = 0;
     this.writeCacheSize = 0;
   },
   startWrite: function(dataBuffer) {
     this.writeBuffer = dataBuffer;
     this.writeCache = 0;
     this.writeCacheSize = 0;
   },
   startRead: function(dataBuffer) {
     this.readBuffer = dataBuffer;
     this.readCache = 0;
     this.readCacheSize = 0;
     this.readIndex = 0;
   },
   getWriteBufferSize: function() {
     return this.writeBuffer.length;
   },
   overwriteWriteBuffer: function(position, data) {
     let writeLength = data.length;
     if (writeLength + position >= this.writeBuffer.length) {
       writeLength = this.writeBuffer.length - position;
     }
     for (let i = 0; i < writeLength; i++) {
       this.writeBuffer[i + position] = data[i];
     }
   }
 };
 /**
  * Helper for CDMA PDU
  *
  * Currently, some function are shared with GsmPDUHelper, they should be
  * moved from GsmPDUHelper to a common object shared among GsmPDUHelper and
  * CdmaPDUHelper.
  */
 function CdmaPDUHelperObject(aContext) {
   this.context = aContext;
 }
 CdmaPDUHelperObject.prototype = {
   context: null,
   //       1..........C
   // Only "1234567890*#" is defined in C.S0005-D v2.0
   dtmfChars: ".1234567890*#...",
   /**
    * Entry point for SMS encoding, the options object is made compatible
    * with existing writeMessage() of GsmPDUHelper, but less key is used.
    *
    * Current used key in options:
    * @param number
    *        String containing the address (number) of the SMS receiver
    * @param body
    *        String containing the message to be sent, segmented part
    * @param dcs
    *        Data coding scheme. One of the PDU_DCS_MSG_CODING_*BITS_ALPHABET
    *        constants.
    * @param encodedBodyLength
    *        Length of the user data when encoded with the given DCS. For UCS2,
    *        in bytes; for 7-bit, in septets.
    * @param requestStatusReport
    *        Request status report.
    * @param segmentRef
    *        Reference number of concatenated SMS message
    * @param segmentMaxSeq
    *        Total number of concatenated SMS message
    * @param segmentSeq
    *        Sequence number of concatenated SMS message
    */
   writeMessage: function(options) {
     if (DEBUG) {
       this.context.debug("cdma_writeMessage: " + JSON.stringify(options));
     }
     // Get encoding
     options.encoding = this.gsmDcsToCdmaEncoding(options.dcs);
     // Common Header
     if (options.segmentMaxSeq > 1) {
       this.writeInt(PDU_CDMA_MSG_TELESERIVCIE_ID_WEMT);
     } else {
       this.writeInt(PDU_CDMA_MSG_TELESERIVCIE_ID_SMS);
     }
     this.writeInt(0);
     this.writeInt(PDU_CDMA_MSG_CATEGORY_UNSPEC);
     // Just fill out address info in byte, rild will encap them for us
     let addrInfo = this.encodeAddr(options.number);
     this.writeByte(addrInfo.digitMode);
     this.writeByte(addrInfo.numberMode);
     this.writeByte(addrInfo.numberType);
     this.writeByte(addrInfo.numberPlan);
     this.writeByte(addrInfo.address.length);
     for (let i = 0; i < addrInfo.address.length; i++) {
       this.writeByte(addrInfo.address[i]);
     }
     // Subaddress, not supported
     this.writeByte(0);  // Subaddress : Type
     this.writeByte(0);  // Subaddress : Odd
     this.writeByte(0);  // Subaddress : length
     // User Data
     let encodeResult = this.encodeUserData(options);
     this.writeByte(encodeResult.length);
     for (let i = 0; i < encodeResult.length; i++) {
       this.writeByte(encodeResult[i]);
     }
     encodeResult = null;
   },
   /**
    * Data writters
    */
   writeInt: function(value) {
     this.context.Buf.writeInt32(value);
   },
   writeByte: function(value) {
     this.context.Buf.writeInt32(value & 0xFF);
   },
   /**
    * Transform GSM DCS to CDMA encoding.
    */
   gsmDcsToCdmaEncoding: function(encoding) {
     switch (encoding) {
       case PDU_DCS_MSG_CODING_7BITS_ALPHABET:
         return PDU_CDMA_MSG_CODING_7BITS_ASCII;
       case PDU_DCS_MSG_CODING_8BITS_ALPHABET:
         return PDU_CDMA_MSG_CODING_OCTET;
       case PDU_DCS_MSG_CODING_16BITS_ALPHABET:
         return PDU_CDMA_MSG_CODING_UNICODE;
     }
     throw new Error("gsmDcsToCdmaEncoding(): Invalid GSM SMS DCS value: " + encoding);
   },
   /**
    * Encode address into CDMA address format, as a byte array.
    *
    * @see 3GGP2 C.S0015-B 2.0, 3.4.3.3 Address Parameters
    *
    * @param address
    *        String of address to be encoded
    */
   encodeAddr: function(address) {
     let result = {};
     result.numberType = PDU_CDMA_MSG_ADDR_NUMBER_TYPE_UNKNOWN;
     result.numberPlan = PDU_CDMA_MSG_ADDR_NUMBER_TYPE_UNKNOWN;
     if (address[0] === '+') {
       address = address.substring(1);
     }
     // Try encode with DTMF first
     result.digitMode = PDU_CDMA_MSG_ADDR_DIGIT_MODE_DTMF;
     result.numberMode = PDU_CDMA_MSG_ADDR_NUMBER_MODE_ANSI;
     result.address = [];
     for (let i = 0; i < address.length; i++) {
       let addrDigit = this.dtmfChars.indexOf(address.charAt(i));
       if (addrDigit < 0) {
         result.digitMode = PDU_CDMA_MSG_ADDR_DIGIT_MODE_ASCII;
         result.numberMode = PDU_CDMA_MSG_ADDR_NUMBER_MODE_ASCII;
         result.address = [];
         break;
       }
       result.address.push(addrDigit);
     }
     // Address can't be encoded with DTMF, then use 7-bit ASCII
     if (result.digitMode !== PDU_CDMA_MSG_ADDR_DIGIT_MODE_DTMF) {
       if (address.indexOf("@") !== -1) {
         result.numberType = PDU_CDMA_MSG_ADDR_NUMBER_TYPE_NATIONAL;
       }
       for (let i = 0; i < address.length; i++) {
         result.address.push(address.charCodeAt(i) & 0x7F);
       }
     }
     return result;
   },
   /**
    * Encode SMS contents in options into CDMA userData field.
    * Corresponding and required subparameters will be added automatically.
    *
    * @see 3GGP2 C.S0015-B 2.0, 3.4.3.7 Bearer Data
    *                           4.5 Bearer Data Parameters
    *
    * Current used key in options:
    * @param body
    *        String containing the message to be sent, segmented part
    * @param encoding
    *        Encoding method of CDMA, can be transformed from GSM DCS by function
    *        cdmaPduHelp.gsmDcsToCdmaEncoding()
    * @param encodedBodyLength
    *        Length of the user data when encoded with the given DCS. For UCS2,
    *        in bytes; for 7-bit, in septets.
    * @param requestStatusReport
    *        Request status report.
    * @param segmentRef
    *        Reference number of concatenated SMS message
    * @param segmentMaxSeq
    *        Total number of concatenated SMS message
    * @param segmentSeq
    *        Sequence number of concatenated SMS message
    */
   encodeUserData: function(options) {
     let userDataBuffer = [];
     this.context.BitBufferHelper.startWrite(userDataBuffer);
     // Message Identifier
     this.encodeUserDataMsgId(options);
     // User Data
     this.encodeUserDataMsg(options);
     // Reply Option
     this.encodeUserDataReplyOption(options);
     return userDataBuffer;
   },
   /**
    * User data subparameter encoder : Message Identifier
    *
    * @see 3GGP2 C.S0015-B 2.0, 4.5.1 Message Identifier
    */
   encodeUserDataMsgId: function(options) {
     let BitBufferHelper = this.context.BitBufferHelper;
     BitBufferHelper.writeBits(PDU_CDMA_MSG_USERDATA_MSG_ID, 8);
     BitBufferHelper.writeBits(3, 8);
     BitBufferHelper.writeBits(PDU_CDMA_MSG_TYPE_SUBMIT, 4);
     BitBufferHelper.writeBits(1, 16); // TODO: How to get message ID?
     if (options.segmentMaxSeq > 1) {
       BitBufferHelper.writeBits(1, 1);
     } else {
       BitBufferHelper.writeBits(0, 1);
     }
     BitBufferHelper.flushWithPadding();
   },
   /**
    * User data subparameter encoder : User Data
    *
    * @see 3GGP2 C.S0015-B 2.0, 4.5.2 User Data
    */
   encodeUserDataMsg: function(options) {
     let BitBufferHelper = this.context.BitBufferHelper;
     BitBufferHelper.writeBits(PDU_CDMA_MSG_USERDATA_BODY, 8);
     // Reserve space for length
     BitBufferHelper.writeBits(0, 8);
     let lengthPosition = BitBufferHelper.getWriteBufferSize();
     BitBufferHelper.writeBits(options.encoding, 5);
     // Add user data header for message segement
     let msgBody = options.body,
         msgBodySize = (options.encoding === PDU_CDMA_MSG_CODING_7BITS_ASCII ?
                        options.encodedBodyLength :
                        msgBody.length);
     if (options.segmentMaxSeq > 1) {
       if (options.encoding === PDU_CDMA_MSG_CODING_7BITS_ASCII) {
           BitBufferHelper.writeBits(msgBodySize + 7, 8); // Required length for user data header, in septet(7-bit)
           BitBufferHelper.writeBits(5, 8);  // total header length 5 bytes
           BitBufferHelper.writeBits(PDU_IEI_CONCATENATED_SHORT_MESSAGES_8BIT, 8);  // header id 0
           BitBufferHelper.writeBits(3, 8);  // length of element for id 0 is 3
           BitBufferHelper.writeBits(options.segmentRef & 0xFF, 8);      // Segement reference
           BitBufferHelper.writeBits(options.segmentMaxSeq & 0xFF, 8);   // Max segment
           BitBufferHelper.writeBits(options.segmentSeq & 0xFF, 8);      // Current segment
           BitBufferHelper.writeBits(0, 1);  // Padding to make header data septet(7-bit) aligned
         } else {
           if (options.encoding === PDU_CDMA_MSG_CODING_UNICODE) {
             BitBufferHelper.writeBits(msgBodySize + 3, 8); // Required length for user data header, in 16-bit
           } else {
             BitBufferHelper.writeBits(msgBodySize + 6, 8); // Required length for user data header, in octet(8-bit)
           }
           BitBufferHelper.writeBits(5, 8);  // total header length 5 bytes
           BitBufferHelper.writeBits(PDU_IEI_CONCATENATED_SHORT_MESSAGES_8BIT, 8);  // header id 0
           BitBufferHelper.writeBits(3, 8);  // length of element for id 0 is 3
           BitBufferHelper.writeBits(options.segmentRef & 0xFF, 8);      // Segement reference
           BitBufferHelper.writeBits(options.segmentMaxSeq & 0xFF, 8);   // Max segment
           BitBufferHelper.writeBits(options.segmentSeq & 0xFF, 8);      // Current segment
         }
     } else {
       BitBufferHelper.writeBits(msgBodySize, 8);
     }
     // Encode message based on encoding method
     const langTable = PDU_NL_LOCKING_SHIFT_TABLES[PDU_NL_IDENTIFIER_DEFAULT];
     const langShiftTable = PDU_NL_SINGLE_SHIFT_TABLES[PDU_NL_IDENTIFIER_DEFAULT];
     for (let i = 0; i < msgBody.length; i++) {
       switch (options.encoding) {
         case PDU_CDMA_MSG_CODING_OCTET: {
           let msgDigit = msgBody.charCodeAt(i);
           BitBufferHelper.writeBits(msgDigit, 8);
           break;
         }
         case PDU_CDMA_MSG_CODING_7BITS_ASCII: {
           let msgDigit = msgBody.charCodeAt(i),
               msgDigitChar = msgBody.charAt(i);
           if (msgDigit >= 32) {
             BitBufferHelper.writeBits(msgDigit, 7);
           } else {
             msgDigit = langTable.indexOf(msgDigitChar);
             if (msgDigit === PDU_NL_EXTENDED_ESCAPE) {
               break;
             }
             if (msgDigit >= 0) {
               BitBufferHelper.writeBits(msgDigit, 7);
             } else {
               msgDigit = langShiftTable.indexOf(msgDigitChar);
               if (msgDigit == -1) {
                 throw new Error("'" + msgDigitChar + "' is not in 7 bit alphabet "
                                 + langIndex + ":" + langShiftIndex + "!");
               }
               if (msgDigit === PDU_NL_RESERVED_CONTROL) {
                 break;
               }
               BitBufferHelper.writeBits(PDU_NL_EXTENDED_ESCAPE, 7);
               BitBufferHelper.writeBits(msgDigit, 7);
             }
           }
           break;
         }
         case PDU_CDMA_MSG_CODING_UNICODE: {
           let msgDigit = msgBody.charCodeAt(i);
           BitBufferHelper.writeBits(msgDigit, 16);
           break;
         }
       }
     }
     BitBufferHelper.flushWithPadding();
     // Fill length
     let currentPosition = BitBufferHelper.getWriteBufferSize();
     BitBufferHelper.overwriteWriteBuffer(lengthPosition - 1, [currentPosition - lengthPosition]);
   },
   /**
    * User data subparameter encoder : Reply Option
    *
    * @see 3GGP2 C.S0015-B 2.0, 4.5.11 Reply Option
    */
   encodeUserDataReplyOption: function(options) {
     if (options.requestStatusReport) {
       let BitBufferHelper = this.context.BitBufferHelper;
       BitBufferHelper.writeBits(PDU_CDMA_MSG_USERDATA_REPLY_OPTION, 8);
       BitBufferHelper.writeBits(1, 8);
       BitBufferHelper.writeBits(0, 1); // USER_ACK_REQ
       BitBufferHelper.writeBits(1, 1); // DAK_REQ
       BitBufferHelper.flushWithPadding();
     }
   },
   /**
    * Entry point for SMS decoding, the returned object is made compatible
    * with existing readMessage() of GsmPDUHelper
    */
   readMessage: function() {
     let message = {};
     // Teleservice Identifier
     message.teleservice = this.readInt();
     // Message Type
     let isServicePresent = this.readByte();
     if (isServicePresent) {
       message.messageType = PDU_CDMA_MSG_TYPE_BROADCAST;
     } else {
       if (message.teleservice) {
         message.messageType = PDU_CDMA_MSG_TYPE_P2P;
       } else {
         message.messageType = PDU_CDMA_MSG_TYPE_ACK;
       }
     }
     // Service Category
     message.service = this.readInt();
     // Originated Address
     let addrInfo = {};
     addrInfo.digitMode = (this.readInt() & 0x01);
     addrInfo.numberMode = (this.readInt() & 0x01);
     addrInfo.numberType = (this.readInt() & 0x01);
     addrInfo.numberPlan = (this.readInt() & 0x01);
     addrInfo.addrLength = this.readByte();
     addrInfo.address = [];
     for (let i = 0; i < addrInfo.addrLength; i++) {
       addrInfo.address.push(this.readByte());
     }
     message.sender = this.decodeAddr(addrInfo);
     // Originated Subaddress
     addrInfo.Type = (this.readInt() & 0x07);
     addrInfo.Odd = (this.readByte() & 0x01);
     addrInfo.addrLength = this.readByte();
     for (let i = 0; i < addrInfo.addrLength; i++) {
       let addrDigit = this.readByte();
       message.sender += String.fromCharCode(addrDigit);
     }
     // Bearer Data
     this.decodeUserData(message);
     // Bearer Data Sub-Parameter: User Data
     let userData = message[PDU_CDMA_MSG_USERDATA_BODY];
     [message.header, message.body, message.encoding, message.data] =
       (userData) ? [userData.header, userData.body, userData.encoding, userData.data]
                  : [null, null, null, null];
     // Bearer Data Sub-Parameter: Message Status
     // Success Delivery (0) if both Message Status and User Data are absent.
     // Message Status absent (-1) if only User Data is available.
     let msgStatus = message[PDU_CDMA_MSG_USER_DATA_MSG_STATUS];
     [message.errorClass, message.msgStatus] =
       (msgStatus) ? [msgStatus.errorClass, msgStatus.msgStatus]
                   : ((message.body) ? [-1, -1] : [0, 0]);
     // Transform message to GSM msg
     let msg = {
       SMSC:             "",
       mti:              0,
       udhi:             0,
       sender:           message.sender,
       recipient:        null,
       pid:              PDU_PID_DEFAULT,
       epid:             PDU_PID_DEFAULT,
       dcs:              0,
       mwi:              null,
       replace:          false,
       header:           message.header,
       body:             message.body,
       data:             message.data,
       sentTimestamp:    message[PDU_CDMA_MSG_USERDATA_TIMESTAMP],
       language:         message[PDU_CDMA_LANGUAGE_INDICATOR],
       status:           null,
       scts:             null,
       dt:               null,
       encoding:         message.encoding,
       messageClass:     GECKO_SMS_MESSAGE_CLASSES[PDU_DCS_MSG_CLASS_NORMAL],
       messageType:      message.messageType,
       serviceCategory:  message.service,
       subMsgType:       message[PDU_CDMA_MSG_USERDATA_MSG_ID].msgType,
       msgId:            message[PDU_CDMA_MSG_USERDATA_MSG_ID].msgId,
       errorClass:       message.errorClass,
       msgStatus:        message.msgStatus,
       teleservice:      message.teleservice
     };
     return msg;
   },
   /**
    * Helper for processing received SMS parcel data.
    *
    * @param length
    *        Length of SMS string in the incoming parcel.
    *
    * @return Message parsed or null for invalid message.
    */
   processReceivedSms: function(length) {
     if (!length) {
       if (DEBUG) this.context.debug("Received empty SMS!");
       return [null, PDU_FCS_UNSPECIFIED];
     }
     let message = this.readMessage();
     if (DEBUG) this.context.debug("Got new SMS: " + JSON.stringify(message));
     // Determine result
     if (!message) {
       return [null, PDU_FCS_UNSPECIFIED];
     }
     return [message, PDU_FCS_OK];
   },
   /**
    * Data readers
    */
   readInt: function() {
     return this.context.Buf.readInt32();
   },
   readByte: function() {
     return (this.context.Buf.readInt32() & 0xFF);
   },
   /**
    * Decode CDMA address data into address string
    *
    * @see 3GGP2 C.S0015-B 2.0, 3.4.3.3 Address Parameters
    *
    * Required key in addrInfo
    * @param addrLength
    *        Length of address
    * @param digitMode
    *        Address encoding method
    * @param address
    *        Array of encoded address data
    */
   decodeAddr: function(addrInfo) {
     let result = "";
     for (let i = 0; i < addrInfo.addrLength; i++) {
       if (addrInfo.digitMode === PDU_CDMA_MSG_ADDR_DIGIT_MODE_DTMF) {
         result += this.dtmfChars.charAt(addrInfo.address[i]);
       } else {
         result += String.fromCharCode(addrInfo.address[i]);
       }
     }
     return result;
   },
   /**
    * Read userData in parcel buffer and decode into message object.
    * Each subparameter will be stored in corresponding key.
    *
    * @see 3GGP2 C.S0015-B 2.0, 3.4.3.7 Bearer Data
    *                           4.5 Bearer Data Parameters
    */
   decodeUserData: function(message) {
     let userDataLength = this.readInt();
     while (userDataLength > 0) {
       let id = this.readByte(),
           length = this.readByte(),
           userDataBuffer = [];
       for (let i = 0; i < length; i++) {
           userDataBuffer.push(this.readByte());
       }
       this.context.BitBufferHelper.startRead(userDataBuffer);
       switch (id) {
         case PDU_CDMA_MSG_USERDATA_MSG_ID:
           message[id] = this.decodeUserDataMsgId();
           break;
         case PDU_CDMA_MSG_USERDATA_BODY:
           message[id] = this.decodeUserDataMsg(message[PDU_CDMA_MSG_USERDATA_MSG_ID].userHeader);
           break;
         case PDU_CDMA_MSG_USERDATA_TIMESTAMP:
           message[id] = this.decodeUserDataTimestamp();
           break;
         case PDU_CDMA_MSG_USERDATA_REPLY_OPTION:
           message[id] = this.decodeUserDataReplyOption();
           break;
         case PDU_CDMA_LANGUAGE_INDICATOR:
           message[id] = this.decodeLanguageIndicator();
           break;
         case PDU_CDMA_MSG_USERDATA_CALLBACK_NUMBER:
           message[id] = this.decodeUserDataCallbackNumber();
           break;
         case PDU_CDMA_MSG_USER_DATA_MSG_STATUS:
           message[id] = this.decodeUserDataMsgStatus();
           break;
       }
       userDataLength -= (length + 2);
       userDataBuffer = [];
     }
   },
   /**
    * User data subparameter decoder: Message Identifier
    *
    * @see 3GGP2 C.S0015-B 2.0, 4.5.1 Message Identifier
    */
   decodeUserDataMsgId: function() {
     let result = {};
     let BitBufferHelper = this.context.BitBufferHelper;
     result.msgType = BitBufferHelper.readBits(4);
     result.msgId = BitBufferHelper.readBits(16);
     result.userHeader = BitBufferHelper.readBits(1);
     return result;
   },
   /**
    * Decode user data header, we only care about segment information
    * on CDMA.
    *
    * This function is mostly copied from gsmPduHelper.readUserDataHeader() but
    * change the read function, because CDMA user header decoding is't byte-wise
    * aligned.
    */
   decodeUserDataHeader: function(encoding) {
     let BitBufferHelper = this.context.BitBufferHelper;
     let header = {},
         headerSize = BitBufferHelper.readBits(8),
         userDataHeaderSize = headerSize + 1,
         headerPaddingBits = 0;
     // Calculate header size
     if (encoding === PDU_DCS_MSG_CODING_7BITS_ALPHABET) {
       // Length is in 7-bit
       header.length = Math.ceil(userDataHeaderSize * 8 / 7);
       // Calulate padding length
       headerPaddingBits = (header.length * 7) - (userDataHeaderSize * 8);
     } else if (encoding === PDU_DCS_MSG_CODING_8BITS_ALPHABET) {
       header.length = userDataHeaderSize;
     } else {
       header.length = userDataHeaderSize / 2;
     }
     while (headerSize) {
       let identifier = BitBufferHelper.readBits(8),
           length = BitBufferHelper.readBits(8);
       headerSize -= (2 + length);
       switch (identifier) {
         case PDU_IEI_CONCATENATED_SHORT_MESSAGES_8BIT: {
           let ref = BitBufferHelper.readBits(8),
               max = BitBufferHelper.readBits(8),
               seq = BitBufferHelper.readBits(8);
           if (max && seq && (seq <= max)) {
             header.segmentRef = ref;
             header.segmentMaxSeq = max;
             header.segmentSeq = seq;
           }
           break;
         }
         case PDU_IEI_APPLICATION_PORT_ADDRESSING_SCHEME_8BIT: {
           let dstp = BitBufferHelper.readBits(8),
               orip = BitBufferHelper.readBits(8);
           if ((dstp < PDU_APA_RESERVED_8BIT_PORTS)
               || (orip < PDU_APA_RESERVED_8BIT_PORTS)) {
             // 3GPP TS 23.040 clause 9.2.3.24.3: "A receiving entity shall
             // ignore any information element where the value of the
             // Information-Element-Data is Reserved or not supported"
             break;
           }
           header.destinationPort = dstp;
           header.originatorPort = orip;
           break;
         }
         case PDU_IEI_APPLICATION_PORT_ADDRESSING_SCHEME_16BIT: {
           let dstp = (BitBufferHelper.readBits(8) << 8) | BitBufferHelper.readBits(8),
               orip = (BitBufferHelper.readBits(8) << 8) | BitBufferHelper.readBits(8);
           // 3GPP TS 23.040 clause 9.2.3.24.4: "A receiving entity shall
           // ignore any information element where the value of the
           // Information-Element-Data is Reserved or not supported"
           if ((dstp < PDU_APA_VALID_16BIT_PORTS)
               && (orip < PDU_APA_VALID_16BIT_PORTS)) {
             header.destinationPort = dstp;
             header.originatorPort = orip;
           }
           break;
         }
         case PDU_IEI_CONCATENATED_SHORT_MESSAGES_16BIT: {
           let ref = (BitBufferHelper.readBits(8) << 8) | BitBufferHelper.readBits(8),
               max = BitBufferHelper.readBits(8),
               seq = BitBufferHelper.readBits(8);
           if (max && seq && (seq <= max)) {
             header.segmentRef = ref;
             header.segmentMaxSeq = max;
             header.segmentSeq = seq;
           }
           break;
         }
         case PDU_IEI_NATIONAL_LANGUAGE_SINGLE_SHIFT: {
           let langShiftIndex = BitBufferHelper.readBits(8);
           if (langShiftIndex < PDU_NL_SINGLE_SHIFT_TABLES.length) {
             header.langShiftIndex = langShiftIndex;
           }
           break;
         }
         case PDU_IEI_NATIONAL_LANGUAGE_LOCKING_SHIFT: {
           let langIndex = BitBufferHelper.readBits(8);
           if (langIndex < PDU_NL_LOCKING_SHIFT_TABLES.length) {
             header.langIndex = langIndex;
           }
           break;
         }
         case PDU_IEI_SPECIAL_SMS_MESSAGE_INDICATION: {
           let msgInd = BitBufferHelper.readBits(8) & 0xFF,
               msgCount = BitBufferHelper.readBits(8);
           /*
            * TS 23.040 V6.8.1 Sec 9.2.3.24.2
            * bits 1 0   : basic message indication type
            * bits 4 3 2 : extended message indication type
            * bits 6 5   : Profile id
            * bit  7     : storage type
            */
           let storeType = msgInd & PDU_MWI_STORE_TYPE_BIT;
           header.mwi = {};
           mwi = header.mwi;
           if (storeType == PDU_MWI_STORE_TYPE_STORE) {
             // Store message because TP_UDH indicates so, note this may override
             // the setting in DCS, but that is expected
             mwi.discard = false;
           } else if (mwi.discard === undefined) {
             // storeType == PDU_MWI_STORE_TYPE_DISCARD
             // only override mwi.discard here if it hasn't already been set
             mwi.discard = true;
           }
           mwi.msgCount = msgCount & 0xFF;
           mwi.active = mwi.msgCount > 0;
           if (DEBUG) {
             this.context.debug("MWI in TP_UDH received: " + JSON.stringify(mwi));
           }
           break;
         }
         default:
           // Drop unsupported id
           for (let i = 0; i < length; i++) {
             BitBufferHelper.readBits(8);
           }
       }
     }
     // Consume padding bits
     if (headerPaddingBits) {
       BitBufferHelper.readBits(headerPaddingBits);
     }
     return header;
   },
   getCdmaMsgEncoding: function(encoding) {
     // Determine encoding method
     switch (encoding) {
       case PDU_CDMA_MSG_CODING_7BITS_ASCII:
       case PDU_CDMA_MSG_CODING_IA5:
       case PDU_CDMA_MSG_CODING_7BITS_GSM:
         return PDU_DCS_MSG_CODING_7BITS_ALPHABET;
       case PDU_CDMA_MSG_CODING_OCTET:
       case PDU_CDMA_MSG_CODING_IS_91:
       case PDU_CDMA_MSG_CODING_LATIN_HEBREW:
       case PDU_CDMA_MSG_CODING_LATIN:
         return PDU_DCS_MSG_CODING_8BITS_ALPHABET;
       case PDU_CDMA_MSG_CODING_UNICODE:
       case PDU_CDMA_MSG_CODING_SHIFT_JIS:
       case PDU_CDMA_MSG_CODING_KOREAN:
         return PDU_DCS_MSG_CODING_16BITS_ALPHABET;
     }
     return null;
   },
   decodeCdmaPDUMsg: function(encoding, msgType, msgBodySize) {
     const langTable = PDU_NL_LOCKING_SHIFT_TABLES[PDU_NL_IDENTIFIER_DEFAULT];
     const langShiftTable = PDU_NL_SINGLE_SHIFT_TABLES[PDU_NL_IDENTIFIER_DEFAULT];
     let BitBufferHelper = this.context.BitBufferHelper;
     let result = "";
     let msgDigit;
     switch (encoding) {
       case PDU_CDMA_MSG_CODING_OCTET:         // TODO : Require Test
         while(msgBodySize > 0) {
           msgDigit = String.fromCharCode(BitBufferHelper.readBits(8));
           result += msgDigit;
           msgBodySize--;
         }
         break;
       case PDU_CDMA_MSG_CODING_IS_91:         // TODO : Require Test
         // Referenced from android code
         switch (msgType) {
           case PDU_CDMA_MSG_CODING_IS_91_TYPE_SMS:
           case PDU_CDMA_MSG_CODING_IS_91_TYPE_SMS_FULL:
           case PDU_CDMA_MSG_CODING_IS_91_TYPE_VOICEMAIL_STATUS:
             while(msgBodySize > 0) {
               msgDigit = String.fromCharCode(BitBufferHelper.readBits(6) + 0x20);
               result += msgDigit;
               msgBodySize--;
             }
             break;
           case PDU_CDMA_MSG_CODING_IS_91_TYPE_CLI:
             let addrInfo = {};
             addrInfo.digitMode = PDU_CDMA_MSG_ADDR_DIGIT_MODE_DTMF;
             addrInfo.numberMode = PDU_CDMA_MSG_ADDR_NUMBER_MODE_ANSI;
             addrInfo.numberType = PDU_CDMA_MSG_ADDR_NUMBER_TYPE_UNKNOWN;
             addrInfo.numberPlan = PDU_CDMA_MSG_ADDR_NUMBER_PLAN_UNKNOWN;
             addrInfo.addrLength = msgBodySize;
             addrInfo.address = [];
             for (let i = 0; i < addrInfo.addrLength; i++) {
               addrInfo.address.push(BitBufferHelper.readBits(4));
             }
             result = this.decodeAddr(addrInfo);
             break;
         }
         // Fall through.
       case PDU_CDMA_MSG_CODING_7BITS_ASCII:
       case PDU_CDMA_MSG_CODING_IA5:           // TODO : Require Test
         while(msgBodySize > 0) {
           msgDigit = BitBufferHelper.readBits(7);
           if (msgDigit >= 32) {
             msgDigit = String.fromCharCode(msgDigit);
           } else {
             if (msgDigit !== PDU_NL_EXTENDED_ESCAPE) {
               msgDigit = langTable[msgDigit];
             } else {
               msgDigit = BitBufferHelper.readBits(7);
               msgBodySize--;
               msgDigit = langShiftTable[msgDigit];
             }
           }
           result += msgDigit;
           msgBodySize--;
         }
         break;
       case PDU_CDMA_MSG_CODING_UNICODE:
         while(msgBodySize > 0) {
           msgDigit = String.fromCharCode(BitBufferHelper.readBits(16));
           result += msgDigit;
           msgBodySize--;
         }
         break;
       case PDU_CDMA_MSG_CODING_7BITS_GSM:     // TODO : Require Test
         while(msgBodySize > 0) {
           msgDigit = BitBufferHelper.readBits(7);
           if (msgDigit !== PDU_NL_EXTENDED_ESCAPE) {
             msgDigit = langTable[msgDigit];
           } else {
             msgDigit = BitBufferHelper.readBits(7);
             msgBodySize--;
             msgDigit = langShiftTable[msgDigit];
           }
           result += msgDigit;
           msgBodySize--;
         }
         break;
       case PDU_CDMA_MSG_CODING_LATIN:         // TODO : Require Test
         // Reference : http://en.wikipedia.org/wiki/ISO/IEC_8859-1
         while(msgBodySize > 0) {
           msgDigit = String.fromCharCode(BitBufferHelper.readBits(8));
           result += msgDigit;
           msgBodySize--;
         }
         break;
       case PDU_CDMA_MSG_CODING_LATIN_HEBREW:  // TODO : Require Test
         // Reference : http://en.wikipedia.org/wiki/ISO/IEC_8859-8
         while(msgBodySize > 0) {
           msgDigit = BitBufferHelper.readBits(8);
           if (msgDigit === 0xDF) {
             msgDigit = String.fromCharCode(0x2017);
           } else if (msgDigit === 0xFD) {
             msgDigit = String.fromCharCode(0x200E);
           } else if (msgDigit === 0xFE) {
             msgDigit = String.fromCharCode(0x200F);
           } else if (msgDigit >= 0xE0 && msgDigit <= 0xFA) {
             msgDigit = String.fromCharCode(0x4F0 + msgDigit);
           } else {
             msgDigit = String.fromCharCode(msgDigit);
           }
           result += msgDigit;
           msgBodySize--;
         }
         break;
       case PDU_CDMA_MSG_CODING_SHIFT_JIS:
         // Reference : http://msdn.microsoft.com/en-US/goglobal/cc305152.aspx
         //             http://demo.icu-project.org/icu-bin/convexp?conv=Shift_JIS
         let shift_jis_message = [];
         while (msgBodySize > 0) {
           shift_jis_message.push(BitBufferHelper.readBits(8));
           msgBodySize--;
         }
         let decoder = new TextDecoder("shift_jis");
         result = decoder.decode(new Uint8Array(shift_jis_message));
         break;
       case PDU_CDMA_MSG_CODING_KOREAN:
       case PDU_CDMA_MSG_CODING_GSM_DCS:
         // Fall through.
       default:
         break;
     }
     return result;
   },
   /**
    * User data subparameter decoder : User Data
    *
    * @see 3GGP2 C.S0015-B 2.0, 4.5.2 User Data
    */
   decodeUserDataMsg: function(hasUserHeader) {
     let BitBufferHelper = this.context.BitBufferHelper;
     let result = {},
         encoding = BitBufferHelper.readBits(5),
         msgType;
     if (encoding === PDU_CDMA_MSG_CODING_IS_91) {
       msgType = BitBufferHelper.readBits(8);
     }
     result.encoding = this.getCdmaMsgEncoding(encoding);
     let msgBodySize = BitBufferHelper.readBits(8);
     // For segmented SMS, a user header is included before sms content
     if (hasUserHeader) {
       result.header = this.decodeUserDataHeader(result.encoding);
       // header size is included in body size, they are decoded
       msgBodySize -= result.header.length;
     }
     // Store original payload if enconding is OCTET for further handling of WAP Push, etc.
     if (encoding === PDU_CDMA_MSG_CODING_OCTET && msgBodySize > 0) {
       result.data = new Uint8Array(msgBodySize);
       for (let i = 0; i < msgBodySize; i++) {
         result.data[i] = BitBufferHelper.readBits(8);
       }
       BitBufferHelper.backwardReadPilot(8 * msgBodySize);
     }
     // Decode sms content
     result.body = this.decodeCdmaPDUMsg(encoding, msgType, msgBodySize);
     return result;
   },
   decodeBcd: function(value) {
     return ((value >> 4) & 0xF) * 10 + (value & 0x0F);
   },
   /**
    * User data subparameter decoder : Time Stamp
    *
    * @see 3GGP2 C.S0015-B 2.0, 4.5.4 Message Center Time Stamp
    */
   decodeUserDataTimestamp: function() {
     let BitBufferHelper = this.context.BitBufferHelper;
     let year = this.decodeBcd(BitBufferHelper.readBits(8)),
         month = this.decodeBcd(BitBufferHelper.readBits(8)) - 1,
         date = this.decodeBcd(BitBufferHelper.readBits(8)),
         hour = this.decodeBcd(BitBufferHelper.readBits(8)),
         min = this.decodeBcd(BitBufferHelper.readBits(8)),
         sec = this.decodeBcd(BitBufferHelper.readBits(8));
     if (year >= 96 && year <= 99) {
       year += 1900;
     } else {
       year += 2000;
     }
     let result = (new Date(year, month, date, hour, min, sec, 0)).valueOf();
     return result;
   },
   /**
    * User data subparameter decoder : Reply Option
    *
    * @see 3GGP2 C.S0015-B 2.0, 4.5.11 Reply Option
    */
   decodeUserDataReplyOption: function() {
     let replyAction = this.context.BitBufferHelper.readBits(4),
         result = { userAck: (replyAction & 0x8) ? true : false,
                    deliverAck: (replyAction & 0x4) ? true : false,
                    readAck: (replyAction & 0x2) ? true : false,
                    report: (replyAction & 0x1) ? true : false
                  };
     return result;
   },
   /**
    * User data subparameter decoder : Language Indicator
    *
    * @see 3GGP2 C.S0015-B 2.0, 4.5.14 Language Indicator
    */
   decodeLanguageIndicator: function() {
     let language = this.context.BitBufferHelper.readBits(8);
     let result = CB_CDMA_LANG_GROUP[language];
     return result;
   },
   /**
    * User data subparameter decoder : Call-Back Number
    *
    * @see 3GGP2 C.S0015-B 2.0, 4.5.15 Call-Back Number
    */
   decodeUserDataCallbackNumber: function() {
     let BitBufferHelper = this.context.BitBufferHelper;
     let digitMode = BitBufferHelper.readBits(1);
     if (digitMode) {
       let numberType = BitBufferHelper.readBits(3),
           numberPlan = BitBufferHelper.readBits(4);
     }
     let numberFields = BitBufferHelper.readBits(8),
         result = "";
     for (let i = 0; i < numberFields; i++) {
       if (digitMode === PDU_CDMA_MSG_ADDR_DIGIT_MODE_DTMF) {
         let addrDigit = BitBufferHelper.readBits(4);
         result += this.dtmfChars.charAt(addrDigit);
       } else {
         let addrDigit = BitBufferHelper.readBits(8);
         result += String.fromCharCode(addrDigit);
       }
     }
     return result;
   },
   /**
    * User data subparameter decoder : Message Status
    *
    * @see 3GGP2 C.S0015-B 2.0, 4.5.21 Message Status
    */
   decodeUserDataMsgStatus: function() {
     let BitBufferHelper = this.context.BitBufferHelper;
     let result = {
       errorClass: BitBufferHelper.readBits(2),
       msgStatus: BitBufferHelper.readBits(6)
     };
     return result;
   },
   /**
    * Decode information record parcel.
    */
   decodeInformationRecord: function() {
     let Buf = this.context.Buf;
     let record = {};
     let numOfRecords = Buf.readInt32();
     let type;
     for (let i = 0; i < numOfRecords; i++) {
       type = Buf.readInt32();
       switch (type) {
         /*
          * Every type is encaped by ril, except extended display
          */
         case PDU_CDMA_INFO_REC_TYPE_DISPLAY:
           record.display = Buf.readString();
           break;
         case PDU_CDMA_INFO_REC_TYPE_CALLED_PARTY_NUMBER:
           record.calledNumber = {};
           record.calledNumber.number = Buf.readString();
           record.calledNumber.type = Buf.readInt32();
           record.calledNumber.plan = Buf.readInt32();
           record.calledNumber.pi = Buf.readInt32();
           record.calledNumber.si = Buf.readInt32();
           break;
         case PDU_CDMA_INFO_REC_TYPE_CALLING_PARTY_NUMBER:
           record.callingNumber = {};
           record.callingNumber.number = Buf.readString();
           record.callingNumber.type = Buf.readInt32();
           record.callingNumber.plan = Buf.readInt32();
           record.callingNumber.pi = Buf.readInt32();
           record.callingNumber.si = Buf.readInt32();
           break;
         case PDU_CDMA_INFO_REC_TYPE_CONNECTED_NUMBER:
           record.connectedNumber = {};
           record.connectedNumber.number = Buf.readString();
           record.connectedNumber.type = Buf.readInt32();
           record.connectedNumber.plan = Buf.readInt32();
           record.connectedNumber.pi = Buf.readInt32();
           record.connectedNumber.si = Buf.readInt32();
           break;
         case PDU_CDMA_INFO_REC_TYPE_SIGNAL:
           record.signal = {};
           record.signal.present = Buf.readInt32();
           record.signal.type = Buf.readInt32();
           record.signal.alertPitch = Buf.readInt32();
           record.signal.signal = Buf.readInt32();
           break;
         case PDU_CDMA_INFO_REC_TYPE_REDIRECTING_NUMBER:
           record.redirect = {};
           record.redirect.number = Buf.readString();
           record.redirect.type = Buf.readInt32();
           record.redirect.plan = Buf.readInt32();
           record.redirect.pi = Buf.readInt32();
           record.redirect.si = Buf.readInt32();
           record.redirect.reason = Buf.readInt32();
           break;
         case PDU_CDMA_INFO_REC_TYPE_LINE_CONTROL:
           record.lineControl = {};
           record.lineControl.polarityIncluded = Buf.readInt32();
           record.lineControl.toggle = Buf.readInt32();
           record.lineControl.recerse = Buf.readInt32();
           record.lineControl.powerDenial = Buf.readInt32();
           break;
         case PDU_CDMA_INFO_REC_TYPE_EXTENDED_DISPLAY:
           let length = Buf.readInt32();
           /*
            * Extended display is still in format defined in
            * C.S0005-F v1.0, 3.7.5.16
            */
           record.extendedDisplay = {};
           let headerByte = Buf.readInt32();
           length--;
           // Based on spec, headerByte must be 0x80 now
           record.extendedDisplay.indicator = (headerByte >> 7);
           record.extendedDisplay.type = (headerByte & 0x7F);
           record.extendedDisplay.records = [];
           while (length > 0) {
             let display = {};
             display.tag = Buf.readInt32();
             length--;
             if (display.tag !== INFO_REC_EXTENDED_DISPLAY_BLANK &&
                 display.tag !== INFO_REC_EXTENDED_DISPLAY_SKIP) {
               display.content = Buf.readString();
               length -= (display.content.length + 1);
             }
             record.extendedDisplay.records.push(display);
           }
           break;
         case PDU_CDMA_INFO_REC_TYPE_T53_CLIR:
           record.cause = Buf.readInt32();
           break;
         case PDU_CDMA_INFO_REC_TYPE_T53_AUDIO_CONTROL:
           record.audioControl = {};
           record.audioControl.upLink = Buf.readInt32();
           record.audioControl.downLink = Buf.readInt32();
           break;
         case PDU_CDMA_INFO_REC_TYPE_T53_RELEASE:
           // Fall through
         default:
           throw new Error("UNSOLICITED_CDMA_INFO_REC(), Unsupported information record type " + record.type + "\n");
       }
     }
     return record;
   }
 };
 /**
  * Helper for processing ICC PDUs.
  */
 function ICCPDUHelperObject(aContext) {
   this.context = aContext;
 }
 ICCPDUHelperObject.prototype = {
   context: null,
   /**
    * Read GSM 8-bit unpacked octets,
    * which are default 7-bit alphabets with bit 8 set to 0.
    *
    * @param numOctets
    *        Number of octets to be read.
    */
   read8BitUnpackedToString: function(numOctets) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let ret = "";
     let escapeFound = false;
     let i;
     const langTable = PDU_NL_LOCKING_SHIFT_TABLES[PDU_NL_IDENTIFIER_DEFAULT];
     const langShiftTable = PDU_NL_SINGLE_SHIFT_TABLES[PDU_NL_IDENTIFIER_DEFAULT];
     for(i = 0; i < numOctets; i++) {
       let octet = GsmPDUHelper.readHexOctet();
       if (octet == 0xff) {
         i++;
         break;
       }
       if (escapeFound) {
         escapeFound = false;
         if (octet == PDU_NL_EXTENDED_ESCAPE) {
           // According to 3GPP TS 23.038, section 6.2.1.1, NOTE 1, "On
           // receipt of this code, a receiving entity shall display a space
           // until another extensiion table is defined."
           ret += " ";
         } else if (octet == PDU_NL_RESERVED_CONTROL) {
           // According to 3GPP TS 23.038 B.2, "This code represents a control
           // character and therefore must not be used for language specific
           // characters."
           ret += " ";
         } else {
           ret += langShiftTable[octet];
         }
       } else if (octet == PDU_NL_EXTENDED_ESCAPE) {
         escapeFound = true;
       } else {
         ret += langTable[octet];
       }
     }
     let Buf = this.context.Buf;
     Buf.seekIncoming((numOctets - i) * Buf.PDU_HEX_OCTET_SIZE);
     return ret;
   },
   /**
    * Write GSM 8-bit unpacked octets.
    *
    * @param numOctets   Number of total octets to be writen, including trailing
    *                    0xff.
    * @param str         String to be written. Could be null.
    */
   writeStringTo8BitUnpacked: function(numOctets, str) {
     const langTable = PDU_NL_LOCKING_SHIFT_TABLES[PDU_NL_IDENTIFIER_DEFAULT];
     const langShiftTable = PDU_NL_SINGLE_SHIFT_TABLES[PDU_NL_IDENTIFIER_DEFAULT];
     let GsmPDUHelper = this.context.GsmPDUHelper;
     // If the character is GSM extended alphabet, two octets will be written.
     // So we need to keep track of number of octets to be written.
     let i, j;
     let len = str ? str.length : 0;
     for (i = 0, j = 0; i < len && j < numOctets; i++) {
       let c = str.charAt(i);
       let octet = langTable.indexOf(c);
       if (octet == -1) {
         // Make sure we still have enough space to write two octets.
         if (j + 2 > numOctets) {
           break;
         }
         octet = langShiftTable.indexOf(c);
         if (octet == -1) {
           // Fallback to ASCII space.
           octet = langTable.indexOf(' ');
         }
         GsmPDUHelper.writeHexOctet(PDU_NL_EXTENDED_ESCAPE);
         j++;
       }
       GsmPDUHelper.writeHexOctet(octet);
       j++;
     }
     // trailing 0xff
     while (j++ < numOctets) {
       GsmPDUHelper.writeHexOctet(0xff);
     }
   },
   /**
    * Read UCS2 String on UICC.
    *
    * @see TS 101.221, Annex A.
    * @param scheme
    *        Coding scheme for UCS2 on UICC. One of 0x80, 0x81 or 0x82.
    * @param numOctets
    *        Number of octets to be read as UCS2 string.
    */
   readICCUCS2String: function(scheme, numOctets) {
     let Buf = this.context.Buf;
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let str = "";
     switch (scheme) {
       /**
        * +------+---------+---------+---------+---------+------+------+
        * | 0x80 | Ch1_msb | Ch1_lsb | Ch2_msb | Ch2_lsb | 0xff | 0xff |
        * +------+---------+---------+---------+---------+------+------+
        */
       case 0x80:
         let isOdd = numOctets % 2;
         let i;
         for (i = 0; i < numOctets - isOdd; i += 2) {
           let code = (GsmPDUHelper.readHexOctet() << 8) | GsmPDUHelper.readHexOctet();
           if (code == 0xffff) {
             i += 2;
             break;
           }
           str += String.fromCharCode(code);
         }
         // Skip trailing 0xff
         Buf.seekIncoming((numOctets - i) * Buf.PDU_HEX_OCTET_SIZE);
         break;
       case 0x81: // Fall through
       case 0x82:
         /**
          * +------+-----+--------+-----+-----+-----+--------+------+
          * | 0x81 | len | offset | Ch1 | Ch2 | ... | Ch_len | 0xff |
          * +------+-----+--------+-----+-----+-----+--------+------+
          *
          * len : The length of characters.
          * offset : 0hhh hhhh h000 0000
          * Ch_n: bit 8 = 0
          *       GSM default alphabets
          *       bit 8 = 1
          *       UCS2 character whose char code is (Ch_n & 0x7f) + offset
          *
          * +------+-----+------------+------------+-----+-----+-----+--------+
          * | 0x82 | len | offset_msb | offset_lsb | Ch1 | Ch2 | ... | Ch_len |
          * +------+-----+------------+------------+-----+-----+-----+--------+
          *
          * len : The length of characters.
          * offset_msb, offset_lsn: offset
          * Ch_n: bit 8 = 0
          *       GSM default alphabets
          *       bit 8 = 1
          *       UCS2 character whose char code is (Ch_n & 0x7f) + offset
          */
         let len = GsmPDUHelper.readHexOctet();
         let offset, headerLen;
         if (scheme == 0x81) {
           offset = GsmPDUHelper.readHexOctet() << 7;
           headerLen = 2;
         } else {
           offset = (GsmPDUHelper.readHexOctet() << 8) | GsmPDUHelper.readHexOctet();
           headerLen = 3;
         }
         for (let i = 0; i < len; i++) {
           let ch = GsmPDUHelper.readHexOctet();
           if (ch & 0x80) {
             // UCS2
             str += String.fromCharCode((ch & 0x7f) + offset);
           } else {
             // GSM 8bit
             let count = 0, gotUCS2 = 0;
             while ((i + count + 1 < len)) {
               count++;
               if (GsmPDUHelper.readHexOctet() & 0x80) {
                 gotUCS2 = 1;
                 break;
               }
             }
             // Unread.
             // +1 for the GSM alphabet indexed at i,
             Buf.seekIncoming(-1 * (count + 1) * Buf.PDU_HEX_OCTET_SIZE);
             str += this.read8BitUnpackedToString(count + 1 - gotUCS2);
             i += count - gotUCS2;
           }
         }
         // Skipping trailing 0xff
         Buf.seekIncoming((numOctets - len - headerLen) * Buf.PDU_HEX_OCTET_SIZE);
         break;
     }
     return str;
   },
   /**
    * Read Alpha Id and Dialling number from TS TS 151.011 clause 10.5.1
    *
    * @param recordSize  The size of linear fixed record.
    */
   readAlphaIdDiallingNumber: function(recordSize) {
     let Buf = this.context.Buf;
     let length = Buf.readInt32();
     let alphaLen = recordSize - ADN_FOOTER_SIZE_BYTES;
     let alphaId = this.readAlphaIdentifier(alphaLen);
     let number = this.readNumberWithLength();
     // Skip 2 unused octets, CCP and EXT1.
     Buf.seekIncoming(2 * Buf.PDU_HEX_OCTET_SIZE);
     Buf.readStringDelimiter(length);
     let contact = null;
     if (alphaId || number) {
       contact = {alphaId: alphaId,
                  number: number};
     }
     return contact;
   },
   /**
    * Write Alpha Identifier and Dialling number from TS 151.011 clause 10.5.1
    *
    * @param recordSize  The size of linear fixed record.
    * @param alphaId     Alpha Identifier to be written.
    * @param number      Dialling Number to be written.
    */
   writeAlphaIdDiallingNumber: function(recordSize, alphaId, number) {
     let Buf = this.context.Buf;
     let GsmPDUHelper = this.context.GsmPDUHelper;
     // Write String length
     let strLen = recordSize * 2;
     Buf.writeInt32(strLen);
     let alphaLen = recordSize - ADN_FOOTER_SIZE_BYTES;
     this.writeAlphaIdentifier(alphaLen, alphaId);
     this.writeNumberWithLength(number);
     // Write unused octets 0xff, CCP and EXT1.
     GsmPDUHelper.writeHexOctet(0xff);
     GsmPDUHelper.writeHexOctet(0xff);
     Buf.writeStringDelimiter(strLen);
   },
   /**
    * Read Alpha Identifier.
    *
    * @see TS 131.102
    *
    * @param numOctets
    *        Number of octets to be read.
    *
    * It uses either
    *  1. SMS default 7-bit alphabet with bit 8 set to 0.
    *  2. UCS2 string.
    *
    * Unused bytes should be set to 0xff.
    */
   readAlphaIdentifier: function(numOctets) {
     if (numOctets === 0) {
       return "";
     }
     let temp;
     // Read the 1st octet to determine the encoding.
     if ((temp = this.context.GsmPDUHelper.readHexOctet()) == 0x80 ||
          temp == 0x81 ||
          temp == 0x82) {
       numOctets--;
       return this.readICCUCS2String(temp, numOctets);
     } else {
       let Buf = this.context.Buf;
       Buf.seekIncoming(-1 * Buf.PDU_HEX_OCTET_SIZE);
       return this.read8BitUnpackedToString(numOctets);
     }
   },
   /**
    * Write Alpha Identifier.
    *
    * @param numOctets
    *        Total number of octets to be written. This includes the length of
    *        alphaId and the length of trailing unused octets(0xff).
    * @param alphaId
    *        Alpha Identifier to be written.
    *
    * Unused octets will be written as 0xff.
    */
   writeAlphaIdentifier: function(numOctets, alphaId) {
     if (numOctets === 0) {
       return;
     }
     // If alphaId is empty or it's of GSM 8 bit.
     if (!alphaId || this.context.ICCUtilsHelper.isGsm8BitAlphabet(alphaId)) {
       this.writeStringTo8BitUnpacked(numOctets, alphaId);
     } else {
       let GsmPDUHelper = this.context.GsmPDUHelper;
       // Currently only support UCS2 coding scheme 0x80.
       GsmPDUHelper.writeHexOctet(0x80);
       numOctets--;
       // Now the alphaId is UCS2 string, each character will take 2 octets.
       if (alphaId.length * 2 > numOctets) {
         alphaId = alphaId.substring(0, Math.floor(numOctets / 2));
       }
       GsmPDUHelper.writeUCS2String(alphaId);
       for (let i = alphaId.length * 2; i < numOctets; i++) {
         GsmPDUHelper.writeHexOctet(0xff);
       }
     }
   },
   /**
    * Read Dialling number.
    *
    * @see TS 131.102
    *
    * @param len
    *        The Length of BCD number.
    *
    * From TS 131.102, in EF_ADN, EF_FDN, the field 'Length of BCD number'
    * means the total bytes should be allocated to store the TON/NPI and
    * the dialing number.
    * For example, if the dialing number is 1234567890,
    * and the TON/NPI is 0x81,
    * The field 'Length of BCD number' should be 06, which is
    * 1 byte to store the TON/NPI, 0x81
    * 5 bytes to store the BCD number 2143658709.
    *
    * Here the definition of the length is different from SMS spec,
    * TS 23.040 9.1.2.5, which the length means
    * "number of useful semi-octets within the Address-Value field".
    */
   readDiallingNumber: function(len) {
     if (DEBUG) this.context.debug("PDU: Going to read Dialling number: " + len);
     if (len === 0) {
       return "";
     }
     let GsmPDUHelper = this.context.GsmPDUHelper;
     // TOA = TON + NPI
     let toa = GsmPDUHelper.readHexOctet();
     let number = GsmPDUHelper.readSwappedNibbleBcdString(len - 1);
     if (number.length <= 0) {
       if (DEBUG) this.context.debug("No number provided");
       return "";
     }
     if ((toa >> 4) == (PDU_TOA_INTERNATIONAL >> 4)) {
       number = '+' + number;
     }
     return number;
   },
   /**
    * Write Dialling Number.
    *
    * @param number  The Dialling number
    */
   writeDiallingNumber: function(number) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let toa = PDU_TOA_ISDN; // 81
     if (number[0] == '+') {
       toa = PDU_TOA_INTERNATIONAL | PDU_TOA_ISDN; // 91
       number = number.substring(1);
     }
     GsmPDUHelper.writeHexOctet(toa);
     GsmPDUHelper.writeSwappedNibbleBCD(number);
   },
   readNumberWithLength: function() {
     let Buf = this.context.Buf;
     let number;
     let numLen = this.context.GsmPDUHelper.readHexOctet();
     if (numLen != 0xff) {
       if (numLen > ADN_MAX_BCD_NUMBER_BYTES) {
         throw new Error("invalid length of BCD number/SSC contents - " + numLen);
       }
       number = this.readDiallingNumber(numLen);
       Buf.seekIncoming((ADN_MAX_BCD_NUMBER_BYTES - numLen) * Buf.PDU_HEX_OCTET_SIZE);
     } else {
       Buf.seekIncoming(ADN_MAX_BCD_NUMBER_BYTES * Buf.PDU_HEX_OCTET_SIZE);
     }
     return number;
   },
   writeNumberWithLength: function(number) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     if (number) {
       let numStart = number[0] == "+" ? 1 : 0;
       number = number.substring(0, numStart) +
                number.substring(numStart)
                      .replace(/[^0-9*#,]/g, "")
                      .replace(/\*/g, "a")
                      .replace(/\#/g, "b")
                      .replace(/\,/g, "c");
       let numDigits = number.length - numStart;
       if (numDigits > ADN_MAX_NUMBER_DIGITS) {
         number = number.substring(0, ADN_MAX_NUMBER_DIGITS + numStart);
         numDigits = number.length - numStart;
       }
       // +1 for TON/NPI
       let numLen = Math.ceil(numDigits / 2) + 1;
       GsmPDUHelper.writeHexOctet(numLen);
       this.writeDiallingNumber(number);
       // Write trailing 0xff of Dialling Number.
       for (let i = 0; i < ADN_MAX_BCD_NUMBER_BYTES - numLen; i++) {
         GsmPDUHelper.writeHexOctet(0xff);
       }
     } else {
       // +1 for numLen
       for (let i = 0; i < ADN_MAX_BCD_NUMBER_BYTES + 1; i++) {
         GsmPDUHelper.writeHexOctet(0xff);
       }
     }
   }
 };
 function StkCommandParamsFactoryObject(aContext) {
   this.context = aContext;
 }
 StkCommandParamsFactoryObject.prototype = {
   context: null,
   createParam: function(cmdDetails, ctlvs) {
     let method = this[cmdDetails.typeOfCommand];
     if (typeof method != "function") {
       if (DEBUG) {
         this.context.debug("Unknown proactive command " +
                            cmdDetails.typeOfCommand.toString(16));
       }
       return null;
     }
     return method.call(this, cmdDetails, ctlvs);
   },
   /**
    * Construct a param for Refresh.
    *
    * @param cmdDetails
    *        The value object of CommandDetails TLV.
    * @param ctlvs
    *        The all TLVs in this proactive command.
    */
   processRefresh: function(cmdDetails, ctlvs) {
     let refreshType = cmdDetails.commandQualifier;
     switch (refreshType) {
       case STK_REFRESH_FILE_CHANGE:
       case STK_REFRESH_NAA_INIT_AND_FILE_CHANGE:
         let ctlv = this.context.StkProactiveCmdHelper.searchForTag(
           COMPREHENSIONTLV_TAG_FILE_LIST, ctlvs);
         if (ctlv) {
           let list = ctlv.value.fileList;
           if (DEBUG) {
             this.context.debug("Refresh, list = " + list);
           }
           this.context.ICCRecordHelper.fetchICCRecords();
         }
         break;
     }
     return null;
   },
   /**
    * Construct a param for Poll Interval.
    *
    * @param cmdDetails
    *        The value object of CommandDetails TLV.
    * @param ctlvs
    *        The all TLVs in this proactive command.
    */
   processPollInterval: function(cmdDetails, ctlvs) {
     let ctlv = this.context.StkProactiveCmdHelper.searchForTag(
         COMPREHENSIONTLV_TAG_DURATION, ctlvs);
     if (!ctlv) {
       this.context.RIL.sendStkTerminalResponse({
         command: cmdDetails,
         resultCode: STK_RESULT_REQUIRED_VALUES_MISSING});
       throw new Error("Stk Poll Interval: Required value missing : Duration");
     }
     return ctlv.value;
   },
   /**
    * Construct a param for Poll Off.
    *
    * @param cmdDetails
    *        The value object of CommandDetails TLV.
    * @param ctlvs
    *        The all TLVs in this proactive command.
    */
   processPollOff: function(cmdDetails, ctlvs) {
     return null;
   },
   /**
    * Construct a param for Set Up Event list.
    *
    * @param cmdDetails
    *        The value object of CommandDetails TLV.
    * @param ctlvs
    *        The all TLVs in this proactive command.
    */
   processSetUpEventList: function(cmdDetails, ctlvs) {
     let ctlv = this.context.StkProactiveCmdHelper.searchForTag(
         COMPREHENSIONTLV_TAG_EVENT_LIST, ctlvs);
     if (!ctlv) {
       this.context.RIL.sendStkTerminalResponse({
         command: cmdDetails,
         resultCode: STK_RESULT_REQUIRED_VALUES_MISSING});
       throw new Error("Stk Event List: Required value missing : Event List");
     }
     return ctlv.value || {eventList: null};
   },
   /**
    * Construct a param for Select Item.
    *
    * @param cmdDetails
    *        The value object of CommandDetails TLV.
    * @param ctlvs
    *        The all TLVs in this proactive command.
    */
   processSelectItem: function(cmdDetails, ctlvs) {
     let StkProactiveCmdHelper = this.context.StkProactiveCmdHelper;
     let menu = {};
     let ctlv = StkProactiveCmdHelper.searchForTag(COMPREHENSIONTLV_TAG_ALPHA_ID, ctlvs);
     if (ctlv) {
       menu.title = ctlv.value.identifier;
     }
     menu.items = [];
     for (let i = 0; i < ctlvs.length; i++) {
       let ctlv = ctlvs[i];
       if (ctlv.tag == COMPREHENSIONTLV_TAG_ITEM) {
         menu.items.push(ctlv.value);
       }
     }
     if (menu.items.length === 0) {
       this.context.RIL.sendStkTerminalResponse({
         command: cmdDetails,
         resultCode: STK_RESULT_REQUIRED_VALUES_MISSING});
       throw new Error("Stk Menu: Required value missing : items");
     }
     ctlv = StkProactiveCmdHelper.searchForTag(COMPREHENSIONTLV_TAG_ITEM_ID, ctlvs);
     if (ctlv) {
       menu.defaultItem = ctlv.value.identifier - 1;
     }
     // The 1st bit and 2nd bit determines the presentation type.
     menu.presentationType = cmdDetails.commandQualifier & 0x03;
     // Help information available.
     if (cmdDetails.commandQualifier & 0x80) {
       menu.isHelpAvailable = true;
     }
     ctlv = StkProactiveCmdHelper.searchForTag(COMPREHENSIONTLV_TAG_NEXT_ACTION_IND, ctlvs);
     if (ctlv) {
       menu.nextActionList = ctlv.value;
     }
     return menu;
   },
   processDisplayText: function(cmdDetails, ctlvs) {
     let StkProactiveCmdHelper = this.context.StkProactiveCmdHelper;
     let textMsg = {};
     let ctlv = StkProactiveCmdHelper.searchForTag(COMPREHENSIONTLV_TAG_TEXT_STRING, ctlvs);
     if (!ctlv) {
       this.context.RIL.sendStkTerminalResponse({
         command: cmdDetails,
         resultCode: STK_RESULT_REQUIRED_VALUES_MISSING});
       throw new Error("Stk Display Text: Required value missing : Text String");
     }
     textMsg.text = ctlv.value.textString;
     ctlv = StkProactiveCmdHelper.searchForTag(COMPREHENSIONTLV_TAG_IMMEDIATE_RESPONSE, ctlvs);
     if (ctlv) {
       textMsg.responseNeeded = true;
     }
     ctlv = StkProactiveCmdHelper.searchForTag(COMPREHENSIONTLV_TAG_DURATION, ctlvs);
     if (ctlv) {
       textMsg.duration = ctlv.value;
     }
     // High priority.
     if (cmdDetails.commandQualifier & 0x01) {
       textMsg.isHighPriority = true;
     }
     // User clear.
     if (cmdDetails.commandQualifier & 0x80) {
       textMsg.userClear = true;
     }
     return textMsg;
   },
   processSetUpIdleModeText: function(cmdDetails, ctlvs) {
     let textMsg = {};
     let ctlv = this.context.StkProactiveCmdHelper.searchForTag(
         COMPREHENSIONTLV_TAG_TEXT_STRING, ctlvs);
     if (!ctlv) {
       this.context.RIL.sendStkTerminalResponse({
         command: cmdDetails,
         resultCode: STK_RESULT_REQUIRED_VALUES_MISSING});
       throw new Error("Stk Set Up Idle Text: Required value missing : Text String");
     }
     textMsg.text = ctlv.value.textString;
     return textMsg;
   },
   processGetInkey: function(cmdDetails, ctlvs) {
     let StkProactiveCmdHelper = this.context.StkProactiveCmdHelper;
     let input = {};
     let ctlv = StkProactiveCmdHelper.searchForTag(COMPREHENSIONTLV_TAG_TEXT_STRING, ctlvs);
     if (!ctlv) {
       this.context.RIL.sendStkTerminalResponse({
         command: cmdDetails,
         resultCode: STK_RESULT_REQUIRED_VALUES_MISSING});
       throw new Error("Stk Get InKey: Required value missing : Text String");
     }
     input.text = ctlv.value.textString;
     // duration
     ctlv = StkProactiveCmdHelper.searchForTag(
         COMPREHENSIONTLV_TAG_DURATION, ctlvs);
     if (ctlv) {
       input.duration = ctlv.value;
     }
     input.minLength = 1;
     input.maxLength = 1;
     // isAlphabet
     if (cmdDetails.commandQualifier & 0x01) {
       input.isAlphabet = true;
     }
     // UCS2
     if (cmdDetails.commandQualifier & 0x02) {
       input.isUCS2 = true;
     }
     // Character sets defined in bit 1 and bit 2 are disable and
     // the YES/NO reponse is required.
     if (cmdDetails.commandQualifier & 0x04) {
       input.isYesNoRequested = true;
     }
     // Help information available.
     if (cmdDetails.commandQualifier & 0x80) {
       input.isHelpAvailable = true;
     }
     return input;
   },
   processGetInput: function(cmdDetails, ctlvs) {
     let StkProactiveCmdHelper = this.context.StkProactiveCmdHelper;
     let input = {};
     let ctlv = StkProactiveCmdHelper.searchForTag(COMPREHENSIONTLV_TAG_TEXT_STRING, ctlvs);
     if (!ctlv) {
       this.context.RIL.sendStkTerminalResponse({
         command: cmdDetails,
         resultCode: STK_RESULT_REQUIRED_VALUES_MISSING});
       throw new Error("Stk Get Input: Required value missing : Text String");
     }
     input.text = ctlv.value.textString;
     ctlv = StkProactiveCmdHelper.searchForTag(COMPREHENSIONTLV_TAG_RESPONSE_LENGTH, ctlvs);
     if (ctlv) {
       input.minLength = ctlv.value.minLength;
       input.maxLength = ctlv.value.maxLength;
     }
     ctlv = StkProactiveCmdHelper.searchForTag(COMPREHENSIONTLV_TAG_DEFAULT_TEXT, ctlvs);
     if (ctlv) {
       input.defaultText = ctlv.value.textString;
     }
     // Alphabet only
     if (cmdDetails.commandQualifier & 0x01) {
       input.isAlphabet = true;
     }
     // UCS2
     if (cmdDetails.commandQualifier & 0x02) {
       input.isUCS2 = true;
     }
     // User input shall not be revealed
     if (cmdDetails.commandQualifier & 0x04) {
       input.hideInput = true;
     }
     // User input in SMS packed format
     if (cmdDetails.commandQualifier & 0x08) {
       input.isPacked = true;
     }
     // Help information available.
     if (cmdDetails.commandQualifier & 0x80) {
       input.isHelpAvailable = true;
     }
     return input;
   },
   processEventNotify: function(cmdDetails, ctlvs) {
     let textMsg = {};
     let ctlv = this.context.StkProactiveCmdHelper.searchForTag(
         COMPREHENSIONTLV_TAG_ALPHA_ID, ctlvs);
     if (!ctlv) {
       this.context.RIL.sendStkTerminalResponse({
         command: cmdDetails,
         resultCode: STK_RESULT_REQUIRED_VALUES_MISSING});
       throw new Error("Stk Event Notfiy: Required value missing : Alpha ID");
     }
     textMsg.text = ctlv.value.identifier;
     return textMsg;
   },
   processSetupCall: function(cmdDetails, ctlvs) {
     let StkProactiveCmdHelper = this.context.StkProactiveCmdHelper;
     let call = {};
     let iter = Iterator(ctlvs);
     let ctlv = StkProactiveCmdHelper.searchForNextTag(COMPREHENSIONTLV_TAG_ALPHA_ID, iter);
     if (ctlv) {
       call.confirmMessage = ctlv.value.identifier;
     }
     ctlv = StkProactiveCmdHelper.searchForNextTag(COMPREHENSIONTLV_TAG_ALPHA_ID, iter);
     if (ctlv) {
       call.callMessage = ctlv.value.identifier;
     }
     ctlv = StkProactiveCmdHelper.searchForTag(COMPREHENSIONTLV_TAG_ADDRESS, ctlvs);
     if (!ctlv) {
       this.context.RIL.sendStkTerminalResponse({
         command: cmdDetails,
         resultCode: STK_RESULT_REQUIRED_VALUES_MISSING});
       throw new Error("Stk Set Up Call: Required value missing : Adress");
     }
     call.address = ctlv.value.number;
     // see 3GPP TS 31.111 section 6.4.13
     ctlv = StkProactiveCmdHelper.searchForTag(COMPREHENSIONTLV_TAG_DURATION, ctlvs);
     if (ctlv) {
       call.duration = ctlv.value;
     }
     return call;
   },
   processLaunchBrowser: function(cmdDetails, ctlvs) {
     let StkProactiveCmdHelper = this.context.StkProactiveCmdHelper;
     let browser = {};
     let ctlv = StkProactiveCmdHelper.searchForTag(COMPREHENSIONTLV_TAG_URL, ctlvs);
     if (!ctlv) {
       this.context.RIL.sendStkTerminalResponse({
         command: cmdDetails,
         resultCode: STK_RESULT_REQUIRED_VALUES_MISSING});
       throw new Error("Stk Launch Browser: Required value missing : URL");
     }
     browser.url = ctlv.value.url;
     ctlv = StkProactiveCmdHelper.searchForTag(COMPREHENSIONTLV_TAG_ALPHA_ID, ctlvs);
     if (ctlv) {
       browser.confirmMessage = ctlv.value.identifier;
     }
     browser.mode = cmdDetails.commandQualifier & 0x03;
     return browser;
   },
   processPlayTone: function(cmdDetails, ctlvs) {
     let StkProactiveCmdHelper = this.context.StkProactiveCmdHelper;
     let playTone = {};
     let ctlv = StkProactiveCmdHelper.searchForTag(
         COMPREHENSIONTLV_TAG_ALPHA_ID, ctlvs);
     if (ctlv) {
       playTone.text = ctlv.value.identifier;
     }
     ctlv = StkProactiveCmdHelper.searchForTag(COMPREHENSIONTLV_TAG_TONE, ctlvs);
     if (ctlv) {
       playTone.tone = ctlv.value.tone;
     }
     ctlv = StkProactiveCmdHelper.searchForTag(
         COMPREHENSIONTLV_TAG_DURATION, ctlvs);
     if (ctlv) {
       playTone.duration = ctlv.value;
     }
     // vibrate is only defined in TS 102.223
     playTone.isVibrate = (cmdDetails.commandQualifier & 0x01) !== 0x00;
     return playTone;
   },
   /**
    * Construct a param for Provide Local Information
    *
    * @param cmdDetails
    *        The value object of CommandDetails TLV.
    * @param ctlvs
    *        The all TLVs in this proactive command.
    */
   processProvideLocalInfo: function(cmdDetails, ctlvs) {
     let provideLocalInfo = {
       localInfoType: cmdDetails.commandQualifier
     };
     return provideLocalInfo;
   },
   processTimerManagement: function(cmdDetails, ctlvs) {
     let StkProactiveCmdHelper = this.context.StkProactiveCmdHelper;
     let timer = {
       timerAction: cmdDetails.commandQualifier
     };
     let ctlv = StkProactiveCmdHelper.searchForTag(
         COMPREHENSIONTLV_TAG_TIMER_IDENTIFIER, ctlvs);
     if (ctlv) {
       timer.timerId = ctlv.value.timerId;
     }
     ctlv = StkProactiveCmdHelper.searchForTag(
         COMPREHENSIONTLV_TAG_TIMER_VALUE, ctlvs);
     if (ctlv) {
       timer.timerValue = ctlv.value.timerValue;
     }
     return timer;
   },
    /**
     * Construct a param for BIP commands.
     *
     * @param cmdDetails
     *        The value object of CommandDetails TLV.
     * @param ctlvs
     *        The all TLVs in this proactive command.
     */
   processBipMessage: function(cmdDetails, ctlvs) {
     let bipMsg = {};
     let ctlv = this.context.StkProactiveCmdHelper.searchForTag(
         COMPREHENSIONTLV_TAG_ALPHA_ID, ctlvs);
     if (ctlv) {
       bipMsg.text = ctlv.value.identifier;
     }
     return bipMsg;
   }
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_REFRESH] = function STK_CMD_REFRESH(cmdDetails, ctlvs) {
   return this.processRefresh(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_POLL_INTERVAL] = function STK_CMD_POLL_INTERVAL(cmdDetails, ctlvs) {
   return this.processPollInterval(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_POLL_OFF] = function STK_CMD_POLL_OFF(cmdDetails, ctlvs) {
   return this.processPollOff(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_PROVIDE_LOCAL_INFO] = function STK_CMD_PROVIDE_LOCAL_INFO(cmdDetails, ctlvs) {
   return this.processProvideLocalInfo(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_SET_UP_EVENT_LIST] = function STK_CMD_SET_UP_EVENT_LIST(cmdDetails, ctlvs) {
   return this.processSetUpEventList(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_SET_UP_MENU] = function STK_CMD_SET_UP_MENU(cmdDetails, ctlvs) {
   return this.processSelectItem(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_SELECT_ITEM] = function STK_CMD_SELECT_ITEM(cmdDetails, ctlvs) {
   return this.processSelectItem(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_DISPLAY_TEXT] = function STK_CMD_DISPLAY_TEXT(cmdDetails, ctlvs) {
   return this.processDisplayText(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_SET_UP_IDLE_MODE_TEXT] = function STK_CMD_SET_UP_IDLE_MODE_TEXT(cmdDetails, ctlvs) {
   return this.processSetUpIdleModeText(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_GET_INKEY] = function STK_CMD_GET_INKEY(cmdDetails, ctlvs) {
   return this.processGetInkey(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_GET_INPUT] = function STK_CMD_GET_INPUT(cmdDetails, ctlvs) {
   return this.processGetInput(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_SEND_SS] = function STK_CMD_SEND_SS(cmdDetails, ctlvs) {
   return this.processEventNotify(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_SEND_USSD] = function STK_CMD_SEND_USSD(cmdDetails, ctlvs) {
   return this.processEventNotify(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_SEND_SMS] = function STK_CMD_SEND_SMS(cmdDetails, ctlvs) {
   return this.processEventNotify(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_SEND_DTMF] = function STK_CMD_SEND_DTMF(cmdDetails, ctlvs) {
   return this.processEventNotify(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_SET_UP_CALL] = function STK_CMD_SET_UP_CALL(cmdDetails, ctlvs) {
   return this.processSetupCall(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_LAUNCH_BROWSER] = function STK_CMD_LAUNCH_BROWSER(cmdDetails, ctlvs) {
   return this.processLaunchBrowser(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_PLAY_TONE] = function STK_CMD_PLAY_TONE(cmdDetails, ctlvs) {
   return this.processPlayTone(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_TIMER_MANAGEMENT] = function STK_CMD_TIMER_MANAGEMENT(cmdDetails, ctlvs) {
   return this.processTimerManagement(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_OPEN_CHANNEL] = function STK_CMD_OPEN_CHANNEL(cmdDetails, ctlvs) {
   return this.processBipMessage(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_CLOSE_CHANNEL] = function STK_CMD_CLOSE_CHANNEL(cmdDetails, ctlvs) {
   return this.processBipMessage(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_RECEIVE_DATA] = function STK_CMD_RECEIVE_DATA(cmdDetails, ctlvs) {
   return this.processBipMessage(cmdDetails, ctlvs);
 };
 StkCommandParamsFactoryObject.prototype[STK_CMD_SEND_DATA] = function STK_CMD_SEND_DATA(cmdDetails, ctlvs) {
   return this.processBipMessage(cmdDetails, ctlvs);
 };
 function StkProactiveCmdHelperObject(aContext) {
   this.context = aContext;
 }
 StkProactiveCmdHelperObject.prototype = {
   context: null,
   retrieve: function(tag, length) {
     let method = this[tag];
     if (typeof method != "function") {
       if (DEBUG) {
         this.context.debug("Unknown comprehension tag " + tag.toString(16));
       }
       let Buf = this.context.Buf;
       Buf.seekIncoming(length * Buf.PDU_HEX_OCTET_SIZE);
       return null;
     }
     return method.call(this, length);
   },
   /**
    * Command Details.
    *
    * | Byte | Description         | Length |
    * |  1   | Command details Tag |   1    |
    * |  2   | Length = 03         |   1    |
    * |  3   | Command number      |   1    |
    * |  4   | Type of Command     |   1    |
    * |  5   | Command Qualifier   |   1    |
    */
   retrieveCommandDetails: function(length) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let cmdDetails = {
       commandNumber: GsmPDUHelper.readHexOctet(),
       typeOfCommand: GsmPDUHelper.readHexOctet(),
       commandQualifier: GsmPDUHelper.readHexOctet()
     };
     return cmdDetails;
   },
   /**
    * Device Identities.
    *
    * | Byte | Description            | Length |
    * |  1   | Device Identity Tag    |   1    |
    * |  2   | Length = 02            |   1    |
    * |  3   | Source device Identity |   1    |
    * |  4   | Destination device Id  |   1    |
    */
   retrieveDeviceId: function(length) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let deviceId = {
       sourceId: GsmPDUHelper.readHexOctet(),
       destinationId: GsmPDUHelper.readHexOctet()
     };
     return deviceId;
   },
   /**
    * Alpha Identifier.
    *
    * | Byte         | Description            | Length |
    * |  1           | Alpha Identifier Tag   |   1    |
    * | 2 ~ (Y-1)+2  | Length (X)             |   Y    |
    * | (Y-1)+3 ~    | Alpha identfier        |   X    |
    * | (Y-1)+X+2    |                        |        |
    */
   retrieveAlphaId: function(length) {
     let alphaId = {
       identifier: this.context.ICCPDUHelper.readAlphaIdentifier(length)
     };
     return alphaId;
   },
   /**
    * Duration.
    *
    * | Byte | Description           | Length |
    * |  1   | Response Length Tag   |   1    |
    * |  2   | Lenth = 02            |   1    |
    * |  3   | Time unit             |   1    |
    * |  4   | Time interval         |   1    |
    */
   retrieveDuration: function(length) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let duration = {
       timeUnit: GsmPDUHelper.readHexOctet(),
       timeInterval: GsmPDUHelper.readHexOctet(),
     };
     return duration;
   },
   /**
    * Address.
    *
    * | Byte         | Description            | Length |
    * |  1           | Alpha Identifier Tag   |   1    |
    * | 2 ~ (Y-1)+2  | Length (X)             |   Y    |
    * | (Y-1)+3      | TON and NPI            |   1    |
    * | (Y-1)+4 ~    | Dialling number        |   X    |
    * | (Y-1)+X+2    |                        |        |
    */
   retrieveAddress: function(length) {
     let address = {
       number : this.context.ICCPDUHelper.readDiallingNumber(length)
     };
     return address;
   },
   /**
    * Text String.
    *
    * | Byte         | Description        | Length |
    * |  1           | Text String Tag    |   1    |
    * | 2 ~ (Y-1)+2  | Length (X)         |   Y    |
    * | (Y-1)+3      | Data coding scheme |   1    |
    * | (Y-1)+4~     | Text String        |   X    |
    * | (Y-1)+X+2    |                    |        |
    */
   retrieveTextString: function(length) {
     if (!length) {
       // null string.
       return {textString: null};
     }
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let text = {
       codingScheme: GsmPDUHelper.readHexOctet()
     };
     length--; // -1 for the codingScheme.
     switch (text.codingScheme & 0x0f) {
       case STK_TEXT_CODING_GSM_7BIT_PACKED:
         text.textString = GsmPDUHelper.readSeptetsToString(length * 8 / 7, 0, 0, 0);
         break;
       case STK_TEXT_CODING_GSM_8BIT:
         text.textString =
           this.context.ICCPDUHelper.read8BitUnpackedToString(length);
         break;
       case STK_TEXT_CODING_UCS2:
         text.textString = GsmPDUHelper.readUCS2String(length);
         break;
     }
     return text;
   },
   /**
    * Tone.
    *
    * | Byte | Description     | Length |
    * |  1   | Tone Tag        |   1    |
    * |  2   | Lenth = 01      |   1    |
    * |  3   | Tone            |   1    |
    */
   retrieveTone: function(length) {
     let tone = {
       tone: this.context.GsmPDUHelper.readHexOctet(),
     };
     return tone;
   },
   /**
    * Item.
    *
    * | Byte         | Description            | Length |
    * |  1           | Item Tag               |   1    |
    * | 2 ~ (Y-1)+2  | Length (X)             |   Y    |
    * | (Y-1)+3      | Identifier of item     |   1    |
    * | (Y-1)+4 ~    | Text string of item    |   X    |
    * | (Y-1)+X+2    |                        |        |
    */
   retrieveItem: function(length) {
     // TS 102.223 ,clause 6.6.7 SET-UP MENU
     // If the "Item data object for item 1" is a null data object
     // (i.e. length = '00' and no value part), this is an indication to the ME
     // to remove the existing menu from the menu system in the ME.
     if (!length) {
       return null;
     }
     let item = {
       identifier: this.context.GsmPDUHelper.readHexOctet(),
       text: this.context.ICCPDUHelper.readAlphaIdentifier(length - 1)
     };
     return item;
   },
   /**
    * Item Identifier.
    *
    * | Byte | Description               | Length |
    * |  1   | Item Identifier Tag       |   1    |
    * |  2   | Lenth = 01                |   1    |
    * |  3   | Identifier of Item chosen |   1    |
    */
   retrieveItemId: function(length) {
     let itemId = {
       identifier: this.context.GsmPDUHelper.readHexOctet()
     };
     return itemId;
   },
   /**
    * Response Length.
    *
    * | Byte | Description                | Length |
    * |  1   | Response Length Tag        |   1    |
    * |  2   | Lenth = 02                 |   1    |
    * |  3   | Minimum length of response |   1    |
    * |  4   | Maximum length of response |   1    |
    */
   retrieveResponseLength: function(length) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let rspLength = {
       minLength : GsmPDUHelper.readHexOctet(),
       maxLength : GsmPDUHelper.readHexOctet()
     };
     return rspLength;
   },
   /**
    * File List.
    *
    * | Byte         | Description            | Length |
    * |  1           | File List Tag          |   1    |
    * | 2 ~ (Y-1)+2  | Length (X)             |   Y    |
    * | (Y-1)+3      | Number of files        |   1    |
    * | (Y-1)+4 ~    | Files                  |   X    |
    * | (Y-1)+X+2    |                        |        |
    */
   retrieveFileList: function(length) {
     let num = this.context.GsmPDUHelper.readHexOctet();
     let fileList = "";
     length--; // -1 for the num octet.
     for (let i = 0; i < 2 * length; i++) {
       // Didn't use readHexOctet here,
       // otherwise 0x00 will be "0", not "00"
       fileList += String.fromCharCode(this.context.Buf.readUint16());
     }
     return {
       fileList: fileList
     };
   },
   /**
    * Default Text.
    *
    * Same as Text String.
    */
   retrieveDefaultText: function(length) {
     return this.retrieveTextString(length);
   },
   /**
    * Event List.
    */
   retrieveEventList: function(length) {
     if (!length) {
       // null means an indication to ME to remove the existing list of events
       // in ME.
       return null;
     }
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let eventList = [];
     for (let i = 0; i < length; i++) {
       eventList.push(GsmPDUHelper.readHexOctet());
     }
     return {
       eventList: eventList
     };
   },
   /**
    * Timer Identifier.
    *
    * | Byte  | Description          | Length |
    * |  1    | Timer Identifier Tag |   1    |
    * |  2    | Length = 01          |   1    |
    * |  3    | Timer Identifier     |   1    |
    */
   retrieveTimerId: function(length) {
     let id = {
       timerId: this.context.GsmPDUHelper.readHexOctet()
     };
     return id;
   },
   /**
    * Timer Value.
    *
    * | Byte  | Description          | Length |
    * |  1    | Timer Value Tag      |   1    |
    * |  2    | Length = 03          |   1    |
    * |  3    | Hour                 |   1    |
    * |  4    | Minute               |   1    |
    * |  5    | Second               |   1    |
    */
   retrieveTimerValue: function(length) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let value = {
       timerValue: (GsmPDUHelper.readSwappedNibbleBcdNum(1) * 60 * 60) +
                   (GsmPDUHelper.readSwappedNibbleBcdNum(1) * 60) +
                   (GsmPDUHelper.readSwappedNibbleBcdNum(1))
     };
     return value;
   },
   /**
    * Immediate Response.
    *
    * | Byte  | Description            | Length |
    * |  1    | Immediate Response Tag |   1    |
    * |  2    | Length = 00            |   1    |
    */
   retrieveImmediaResponse: function(length) {
     return {};
   },
   /**
    * URL
    *
    * | Byte      | Description         | Length |
    * |  1        | URL Tag             |   1    |
    * | 2 ~ (Y+1) | Length(X)           |   Y    |
    * | (Y+2) ~   | URL                 |   X    |
    * | (Y+1+X)   |                     |        |
    */
   retrieveUrl: function(length) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let s = "";
     for (let i = 0; i < length; i++) {
       s += String.fromCharCode(GsmPDUHelper.readHexOctet());
     }
     return {url: s};
   },
   /**
    * Next Action Indicator List.
    *
    * | Byte  | Description      | Length |
    * |  1    | Next Action tag  |   1    |
    * |  1    | Length(X)        |   1    |
    * |  3~   | Next Action List |   X    |
    * | 3+X-1 |                  |        |
    */
   retrieveNextActionList: function(length) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let nextActionList = [];
     for (let i = 0; i < length; i++) {
       nextActionList.push(GsmPDUHelper.readHexOctet());
     }
     return nextActionList;
   },
   searchForTag: function(tag, ctlvs) {
     let iter = Iterator(ctlvs);
     return this.searchForNextTag(tag, iter);
   },
   searchForNextTag: function(tag, iter) {
     for (let [index, ctlv] in iter) {
       if ((ctlv.tag & ~COMPREHENSIONTLV_FLAG_CR) == tag) {
         return ctlv;
       }
     }
     return null;
   },
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_COMMAND_DETAILS] = function COMPREHENSIONTLV_TAG_COMMAND_DETAILS(length) {
   return this.retrieveCommandDetails(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_DEVICE_ID] = function COMPREHENSIONTLV_TAG_DEVICE_ID(length) {
   return this.retrieveDeviceId(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_ALPHA_ID] = function COMPREHENSIONTLV_TAG_ALPHA_ID(length) {
   return this.retrieveAlphaId(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_DURATION] = function COMPREHENSIONTLV_TAG_DURATION(length) {
   return this.retrieveDuration(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_ADDRESS] = function COMPREHENSIONTLV_TAG_ADDRESS(length) {
   return this.retrieveAddress(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_TEXT_STRING] = function COMPREHENSIONTLV_TAG_TEXT_STRING(length) {
   return this.retrieveTextString(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_TONE] = function COMPREHENSIONTLV_TAG_TONE(length) {
   return this.retrieveTone(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_ITEM] = function COMPREHENSIONTLV_TAG_ITEM(length) {
   return this.retrieveItem(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_ITEM_ID] = function COMPREHENSIONTLV_TAG_ITEM_ID(length) {
   return this.retrieveItemId(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_RESPONSE_LENGTH] = function COMPREHENSIONTLV_TAG_RESPONSE_LENGTH(length) {
   return this.retrieveResponseLength(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_FILE_LIST] = function COMPREHENSIONTLV_TAG_FILE_LIST(length) {
   return this.retrieveFileList(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_DEFAULT_TEXT] = function COMPREHENSIONTLV_TAG_DEFAULT_TEXT(length) {
   return this.retrieveDefaultText(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_EVENT_LIST] = function COMPREHENSIONTLV_TAG_EVENT_LIST(length) {
   return this.retrieveEventList(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_TIMER_IDENTIFIER] = function COMPREHENSIONTLV_TAG_TIMER_IDENTIFIER(length) {
   return this.retrieveTimerId(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_TIMER_VALUE] = function COMPREHENSIONTLV_TAG_TIMER_VALUE(length) {
   return this.retrieveTimerValue(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_IMMEDIATE_RESPONSE] = function COMPREHENSIONTLV_TAG_IMMEDIATE_RESPONSE(length) {
   return this.retrieveImmediaResponse(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_URL] = function COMPREHENSIONTLV_TAG_URL(length) {
   return this.retrieveUrl(length);
 };
 StkProactiveCmdHelperObject.prototype[COMPREHENSIONTLV_TAG_NEXT_ACTION_IND] = function COMPREHENSIONTLV_TAG_NEXT_ACTION_IND(length) {
   return this.retrieveNextActionList(length);
 };
 function ComprehensionTlvHelperObject(aContext) {
   this.context = aContext;
 }
 ComprehensionTlvHelperObject.prototype = {
   context: null,
   /**
    * Decode raw data to a Comprehension-TLV.
    */
   decode: function() {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let hlen = 0; // For header(tag field + length field) length.
     let temp = GsmPDUHelper.readHexOctet();
     hlen++;
     // TS 101.220, clause 7.1.1
     let tag, cr;
     switch (temp) {
       // TS 101.220, clause 7.1.1
       case 0x0: // Not used.
       case 0xff: // Not used.
       case 0x80: // Reserved for future use.
         throw new Error("Invalid octet when parsing Comprehension TLV :" + temp);
       case 0x7f: // Tag is three byte format.
         // TS 101.220 clause 7.1.1.2.
         // | Byte 1 | Byte 2                        | Byte 3 |
         // |        | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |        |
         // | 0x7f   |CR | Tag Value                          |
         tag = (GsmPDUHelper.readHexOctet() << 8) | GsmPDUHelper.readHexOctet();
         hlen += 2;
         cr = (tag & 0x8000) !== 0;
         tag &= ~0x8000;
         break;
       default: // Tag is single byte format.
         tag = temp;
         // TS 101.220 clause 7.1.1.1.
         // | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
         // |CR | Tag Value                 |
         cr = (tag & 0x80) !== 0;
         tag &= ~0x80;
     }
     // TS 101.220 clause 7.1.2, Length Encoding.
     // Length   |  Byte 1  | Byte 2 | Byte 3 | Byte 4 |
     // 0 - 127  |  00 - 7f | N/A    | N/A    | N/A    |
     // 128-255  |  81      | 80 - ff| N/A    | N/A    |
     // 256-65535|  82      | 0100 - ffff     | N/A    |
     // 65536-   |  83      |     010000 - ffffff      |
     // 16777215
     //
     // Length errors: TS 11.14, clause 6.10.6
     let length; // Data length.
     temp = GsmPDUHelper.readHexOctet();
     hlen++;
     if (temp < 0x80) {
       length = temp;
     } else if (temp == 0x81) {
       length = GsmPDUHelper.readHexOctet();
       hlen++;
       if (length < 0x80) {
         throw new Error("Invalid length in Comprehension TLV :" + length);
       }
     } else if (temp == 0x82) {
       length = (GsmPDUHelper.readHexOctet() << 8) | GsmPDUHelper.readHexOctet();
       hlen += 2;
       if (lenth < 0x0100) {
         throw new Error("Invalid length in 3-byte Comprehension TLV :" + length);
       }
     } else if (temp == 0x83) {
       length = (GsmPDUHelper.readHexOctet() << 16) |
                (GsmPDUHelper.readHexOctet() << 8)  |
                 GsmPDUHelper.readHexOctet();
       hlen += 3;
       if (length < 0x010000) {
         throw new Error("Invalid length in 4-byte Comprehension TLV :" + length);
       }
     } else {
       throw new Error("Invalid octet in Comprehension TLV :" + temp);
     }
     let ctlv = {
       tag: tag,
       length: length,
       value: this.context.StkProactiveCmdHelper.retrieve(tag, length),
       cr: cr,
       hlen: hlen
     };
     return ctlv;
   },
   decodeChunks: function(length) {
     let chunks = [];
     let index = 0;
     while (index < length) {
       let tlv = this.decode();
       chunks.push(tlv);
       index += tlv.length;
       index += tlv.hlen;
     }
     return chunks;
   },
   /**
    * Write Location Info Comprehension TLV.
    *
    * @param loc location Information.
    */
   writeLocationInfoTlv: function(loc) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_LOCATION_INFO |
                                COMPREHENSIONTLV_FLAG_CR);
     GsmPDUHelper.writeHexOctet(loc.gsmCellId > 0xffff ? 9 : 7);
     // From TS 11.14, clause 12.19
     // "The mobile country code (MCC), the mobile network code (MNC),
     // the location area code (LAC) and the cell ID are
     // coded as in TS 04.08."
     // And from TS 04.08 and TS 24.008,
     // the format is as follows:
     //
     // MCC = MCC_digit_1 + MCC_digit_2 + MCC_digit_3
     //
     //   8  7  6  5    4  3  2  1
     // +-------------+-------------+
     // | MCC digit 2 | MCC digit 1 | octet 2
     // | MNC digit 3 | MCC digit 3 | octet 3
     // | MNC digit 2 | MNC digit 1 | octet 4
     // +-------------+-------------+
     //
     // Also in TS 24.008
     // "However a network operator may decide to
     // use only two digits in the MNC in the LAI over the
     // radio interface. In this case, bits 5 to 8 of octet 3
     // shall be coded as '1111'".
     // MCC & MNC, 3 octets
     let mcc = loc.mcc, mnc;
     if (loc.mnc.length == 2) {
       mnc = "F" + loc.mnc;
     } else {
       mnc = loc.mnc[2] + loc.mnc[0] + loc.mnc[1];
     }
     GsmPDUHelper.writeSwappedNibbleBCD(mcc + mnc);
     // LAC, 2 octets
     GsmPDUHelper.writeHexOctet((loc.gsmLocationAreaCode >> 8) & 0xff);
     GsmPDUHelper.writeHexOctet(loc.gsmLocationAreaCode & 0xff);
     // Cell Id
     if (loc.gsmCellId > 0xffff) {
       // UMTS/WCDMA, gsmCellId is 28 bits.
       GsmPDUHelper.writeHexOctet((loc.gsmCellId >> 24) & 0xff);
       GsmPDUHelper.writeHexOctet((loc.gsmCellId >> 16) & 0xff);
       GsmPDUHelper.writeHexOctet((loc.gsmCellId >> 8) & 0xff);
       GsmPDUHelper.writeHexOctet(loc.gsmCellId & 0xff);
     } else {
       // GSM, gsmCellId is 16 bits.
       GsmPDUHelper.writeHexOctet((loc.gsmCellId >> 8) & 0xff);
       GsmPDUHelper.writeHexOctet(loc.gsmCellId & 0xff);
     }
   },
   /**
    * Given a geckoError string, this function translates it into cause value
    * and write the value into buffer.
    *
    * @param geckoError Error string that is passed to gecko.
    */
   writeCauseTlv: function(geckoError) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let cause = -1;
     for (let errorNo in RIL_ERROR_TO_GECKO_ERROR) {
       if (geckoError == RIL_ERROR_TO_GECKO_ERROR[errorNo]) {
         cause = errorNo;
         break;
       }
     }
     cause = (cause == -1) ? ERROR_SUCCESS : cause;
     GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_CAUSE |
                                COMPREHENSIONTLV_FLAG_CR);
     GsmPDUHelper.writeHexOctet(2);  // For single cause value.
     // TS 04.08, clause 10.5.4.11: National standard code + user location.
     GsmPDUHelper.writeHexOctet(0x60);
     // TS 04.08, clause 10.5.4.11: ext bit = 1 + 7 bits for cause.
     // +-----------------+----------------------------------+
     // | Ext = 1 (1 bit) |          Cause (7 bits)          |
     // +-----------------+----------------------------------+
     GsmPDUHelper.writeHexOctet(0x80 | cause);
   },
   writeDateTimeZoneTlv: function(date) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_DATE_TIME_ZONE);
     GsmPDUHelper.writeHexOctet(7);
     GsmPDUHelper.writeTimestamp(date);
   },
   writeLanguageTlv: function(language) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_LANGUAGE);
     GsmPDUHelper.writeHexOctet(2);
     // ISO 639-1, Alpha-2 code
     // TS 123.038, clause 6.2.1, GSM 7 bit Default Alphabet
     GsmPDUHelper.writeHexOctet(
       PDU_NL_LOCKING_SHIFT_TABLES[PDU_NL_IDENTIFIER_DEFAULT].indexOf(language[0]));
     GsmPDUHelper.writeHexOctet(
       PDU_NL_LOCKING_SHIFT_TABLES[PDU_NL_IDENTIFIER_DEFAULT].indexOf(language[1]));
   },
   /**
    * Write Timer Value Comprehension TLV.
    *
    * @param seconds length of time during of the timer.
    * @param cr Comprehension Required or not
    */
   writeTimerValueTlv: function(seconds, cr) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     GsmPDUHelper.writeHexOctet(COMPREHENSIONTLV_TAG_TIMER_VALUE |
                                (cr ? COMPREHENSIONTLV_FLAG_CR : 0));
     GsmPDUHelper.writeHexOctet(3);
     // TS 102.223, clause 8.38
     // +----------------+------------------+-------------------+
     // | hours (1 byte) | minutes (1 btye) | secounds (1 byte) |
     // +----------------+------------------+-------------------+
     GsmPDUHelper.writeSwappedNibbleBCDNum(Math.floor(seconds / 60 / 60));
     GsmPDUHelper.writeSwappedNibbleBCDNum(Math.floor(seconds / 60) % 60);
     GsmPDUHelper.writeSwappedNibbleBCDNum(seconds % 60);
   },
   getSizeOfLengthOctets: function(length) {
     if (length >= 0x10000) {
       return 4; // 0x83, len_1, len_2, len_3
     } else if (length >= 0x100) {
       return 3; // 0x82, len_1, len_2
     } else if (length >= 0x80) {
       return 2; // 0x81, len
     } else {
       return 1; // len
     }
   },
   writeLength: function(length) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     // TS 101.220 clause 7.1.2, Length Encoding.
     // Length   |  Byte 1  | Byte 2 | Byte 3 | Byte 4 |
     // 0 - 127  |  00 - 7f | N/A    | N/A    | N/A    |
     // 128-255  |  81      | 80 - ff| N/A    | N/A    |
     // 256-65535|  82      | 0100 - ffff     | N/A    |
     // 65536-   |  83      |     010000 - ffffff      |
     // 16777215
     if (length < 0x80) {
       GsmPDUHelper.writeHexOctet(length);
     } else if (0x80 <= length && length < 0x100) {
       GsmPDUHelper.writeHexOctet(0x81);
       GsmPDUHelper.writeHexOctet(length);
     } else if (0x100 <= length && length < 0x10000) {
       GsmPDUHelper.writeHexOctet(0x82);
       GsmPDUHelper.writeHexOctet((length >> 8) & 0xff);
       GsmPDUHelper.writeHexOctet(length & 0xff);
     } else if (0x10000 <= length && length < 0x1000000) {
       GsmPDUHelper.writeHexOctet(0x83);
       GsmPDUHelper.writeHexOctet((length >> 16) & 0xff);
       GsmPDUHelper.writeHexOctet((length >> 8) & 0xff);
       GsmPDUHelper.writeHexOctet(length & 0xff);
     } else {
       throw new Error("Invalid length value :" + length);
     }
   },
 };
 function BerTlvHelperObject(aContext) {
   this.context = aContext;
 }
 BerTlvHelperObject.prototype = {
   context: null,
   /**
    * Decode Ber TLV.
    *
    * @param dataLen
    *        The length of data in bytes.
    */
   decode: function(dataLen) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let hlen = 0;
     let tag = GsmPDUHelper.readHexOctet();
     hlen++;
     // The length is coded onto 1 or 2 bytes.
     // Length    | Byte 1                | Byte 2
     // 0 - 127   | length ('00' to '7f') | N/A
     // 128 - 255 | '81'                  | length ('80' to 'ff')
     let length;
     let temp = GsmPDUHelper.readHexOctet();
     hlen++;
     if (temp < 0x80) {
       length = temp;
     } else if (temp === 0x81) {
       length = GsmPDUHelper.readHexOctet();
       hlen++;
       if (length < 0x80) {
         throw new Error("Invalid length " + length);
       }
     } else {
       throw new Error("Invalid length octet " + temp);
     }
     // Header + body length check.
     if (dataLen - hlen !== length) {
       throw new Error("Unexpected BerTlvHelper value length!!");
     }
     let method = this[tag];
     if (typeof method != "function") {
       throw new Error("Unknown Ber tag 0x" + tag.toString(16));
     }
     let value = method.call(this, length);
     return {
       tag: tag,
       length: length,
       value: value
     };
   },
   /**
    * Process the value part for FCP template TLV.
    *
    * @param length
    *        The length of data in bytes.
    */
   processFcpTemplate: function(length) {
     let tlvs = this.decodeChunks(length);
     return tlvs;
   },
   /**
    * Process the value part for proactive command TLV.
    *
    * @param length
    *        The length of data in bytes.
    */
   processProactiveCommand: function(length) {
     let ctlvs = this.context.ComprehensionTlvHelper.decodeChunks(length);
     return ctlvs;
   },
   /**
    * Decode raw data to a Ber-TLV.
    */
   decodeInnerTlv: function() {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let tag = GsmPDUHelper.readHexOctet();
     let length = GsmPDUHelper.readHexOctet();
     return {
       tag: tag,
       length: length,
       value: this.retrieve(tag, length)
     };
   },
   decodeChunks: function(length) {
     let chunks = [];
     let index = 0;
     while (index < length) {
       let tlv = this.decodeInnerTlv();
       if (tlv.value) {
         chunks.push(tlv);
       }
       index += tlv.length;
       // tag + length fields consume 2 bytes.
       index += 2;
     }
     return chunks;
   },
   retrieve: function(tag, length) {
     let method = this[tag];
     if (typeof method != "function") {
       if (DEBUG) {
         this.context.debug("Unknown Ber tag : 0x" + tag.toString(16));
       }
       let Buf = this.context.Buf;
       Buf.seekIncoming(length * Buf.PDU_HEX_OCTET_SIZE);
       return null;
     }
     return method.call(this, length);
   },
   /**
    * File Size Data.
    *
    * | Byte        | Description                                | Length |
    * |  1          | Tag                                        |   1    |
    * |  2          | Length                                     |   1    |
    * |  3 to X+24  | Number of allocated data bytes in the file |   X    |
    * |             | , excluding structural information         |        |
    */
   retrieveFileSizeData: function(length) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let fileSizeData = 0;
     for (let i = 0; i < length; i++) {
       fileSizeData = fileSizeData << 8;
       fileSizeData += GsmPDUHelper.readHexOctet();
     }
     return {fileSizeData: fileSizeData};
   },
   /**
    * File Descriptor.
    *
    * | Byte    | Description           | Length |
    * |  1      | Tag                   |   1    |
    * |  2      | Length                |   1    |
    * |  3      | File descriptor byte  |   1    |
    * |  4      | Data coding byte      |   1    |
    * |  5 ~ 6  | Record length         |   2    |
    * |  7      | Number of records     |   1    |
    */
   retrieveFileDescriptor: function(length) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let fileDescriptorByte = GsmPDUHelper.readHexOctet();
     let dataCodingByte = GsmPDUHelper.readHexOctet();
     // See TS 102 221 Table 11.5, we only care the least 3 bits for the
     // structure of file.
     let fileStructure = fileDescriptorByte & 0x07;
     let fileDescriptor = {
       fileStructure: fileStructure
     };
     // byte 5 ~ 7 are mandatory for linear fixed and cyclic files, otherwise
     // they are not applicable.
     if (fileStructure === UICC_EF_STRUCTURE[EF_TYPE_LINEAR_FIXED] ||
         fileStructure === UICC_EF_STRUCTURE[EF_TYPE_CYCLIC]) {
       fileDescriptor.recordLength = (GsmPDUHelper.readHexOctet() << 8) +
                                      GsmPDUHelper.readHexOctet();
       fileDescriptor.numOfRecords = GsmPDUHelper.readHexOctet();
     }
     return fileDescriptor;
   },
   /**
    * File identifier.
    *
    * | Byte    | Description      | Length |
    * |  1      | Tag              |   1    |
    * |  2      | Length           |   1    |
    * |  3 ~ 4  | File identifier  |   2    |
    */
   retrieveFileIdentifier: function(length) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     return {fileId : (GsmPDUHelper.readHexOctet() << 8) +
                       GsmPDUHelper.readHexOctet()};
   },
   searchForNextTag: function(tag, iter) {
     for (let [index, tlv] in iter) {
       if (tlv.tag === tag) {
         return tlv;
       }
     }
     return null;
   }
 };
 BerTlvHelperObject.prototype[BER_FCP_TEMPLATE_TAG] = function BER_FCP_TEMPLATE_TAG(length) {
   return this.processFcpTemplate(length);
 };
 BerTlvHelperObject.prototype[BER_PROACTIVE_COMMAND_TAG] = function BER_PROACTIVE_COMMAND_TAG(length) {
   return this.processProactiveCommand(length);
 };
 BerTlvHelperObject.prototype[BER_FCP_FILE_SIZE_DATA_TAG] = function BER_FCP_FILE_SIZE_DATA_TAG(length) {
   return this.retrieveFileSizeData(length);
 };
 BerTlvHelperObject.prototype[BER_FCP_FILE_DESCRIPTOR_TAG] = function BER_FCP_FILE_DESCRIPTOR_TAG(length) {
   return this.retrieveFileDescriptor(length);
 };
 BerTlvHelperObject.prototype[BER_FCP_FILE_IDENTIFIER_TAG] = function BER_FCP_FILE_IDENTIFIER_TAG(length) {
   return this.retrieveFileIdentifier(length);
 };
 /**
  * ICC Helper for getting EF path.
  */
 function ICCFileHelperObject(aContext) {
   this.context = aContext;
 }
 ICCFileHelperObject.prototype = {
   context: null,
   /**
    * This function handles only EFs that are common to RUIM, SIM, USIM
    * and other types of ICC cards.
    */
   getCommonEFPath: function(fileId) {
     switch (fileId) {
       case ICC_EF_ICCID:
         return EF_PATH_MF_SIM;
       case ICC_EF_ADN:
         return EF_PATH_MF_SIM + EF_PATH_DF_TELECOM;
       case ICC_EF_PBR:
         return EF_PATH_MF_SIM + EF_PATH_DF_TELECOM + EF_PATH_DF_PHONEBOOK;
     }
     return null;
   },
   /**
    * This function handles EFs for SIM.
    */
   getSimEFPath: function(fileId) {
     switch (fileId) {
       case ICC_EF_FDN:
       case ICC_EF_MSISDN:
       case ICC_EF_SMS:
         return EF_PATH_MF_SIM + EF_PATH_DF_TELECOM;
       case ICC_EF_AD:
       case ICC_EF_MBDN:
       case ICC_EF_MWIS:
       case ICC_EF_PLMNsel:
       case ICC_EF_SPN:
       case ICC_EF_SPDI:
       case ICC_EF_SST:
       case ICC_EF_PHASE:
       case ICC_EF_CBMI:
       case ICC_EF_CBMID:
       case ICC_EF_CBMIR:
       case ICC_EF_OPL:
       case ICC_EF_PNN:
         return EF_PATH_MF_SIM + EF_PATH_DF_GSM;
       default:
         return null;
     }
   },
   /**
    * This function handles EFs for USIM.
    */
   getUSimEFPath: function(fileId) {
     switch (fileId) {
       case ICC_EF_AD:
       case ICC_EF_FDN:
       case ICC_EF_MBDN:
       case ICC_EF_MWIS:
       case ICC_EF_UST:
       case ICC_EF_MSISDN:
       case ICC_EF_SPN:
       case ICC_EF_SPDI:
       case ICC_EF_CBMI:
       case ICC_EF_CBMID:
       case ICC_EF_CBMIR:
       case ICC_EF_OPL:
       case ICC_EF_PNN:
       case ICC_EF_SMS:
         return EF_PATH_MF_SIM + EF_PATH_ADF_USIM;
       default:
         // The file ids in USIM phone book entries are decided by the
         // card manufacturer. So if we don't match any of the cases
         // above and if its a USIM return the phone book path.
         return EF_PATH_MF_SIM + EF_PATH_DF_TELECOM + EF_PATH_DF_PHONEBOOK;
     }
   },
   /**
    * This function handles EFs for RUIM
    */
   getRuimEFPath: function(fileId) {
     switch(fileId) {
       case ICC_EF_CSIM_IMSI_M:
       case ICC_EF_CSIM_CDMAHOME:
       case ICC_EF_CSIM_CST:
       case ICC_EF_CSIM_SPN:
         return EF_PATH_MF_SIM + EF_PATH_DF_CDMA;
       case ICC_EF_FDN:
         return EF_PATH_MF_SIM + EF_PATH_DF_TELECOM;
       default:
         return null;
     }
   },
   /**
    * Helper function for getting the pathId for the specific ICC record
    * depeding on which type of ICC card we are using.
    *
    * @param fileId
    *        File id.
    * @return The pathId or null in case of an error or invalid input.
    */
   getEFPath: function(fileId) {
     let appType = this.context.RIL.appType;
     if (appType == null) {
       return null;
     }
     let path = this.getCommonEFPath(fileId);
     if (path) {
       return path;
     }
     switch (appType) {
       case CARD_APPTYPE_SIM:
         return this.getSimEFPath(fileId);
       case CARD_APPTYPE_USIM:
         return this.getUSimEFPath(fileId);
       case CARD_APPTYPE_RUIM:
         return this.getRuimEFPath(fileId);
       default:
         return null;
     }
   }
 };
 /**
  * Helper for ICC IO functionalities.
  */
 function ICCIOHelperObject(aContext) {
   this.context = aContext;
 }
 ICCIOHelperObject.prototype = {
   context: null,
   /**
    * Load EF with type 'Linear Fixed'.
    *
    * @param fileId
    *        The file to operate on, one of the ICC_EF_* constants.
    * @param recordNumber [optional]
    *        The number of the record shall be loaded.
    * @param recordSize [optional]
    *        The size of the record.
    * @param callback [optional]
    *        The callback function shall be called when the record(s) is read.
    * @param onerror [optional]
    *        The callback function shall be called when failure.
    */
   loadLinearFixedEF: function(options) {
     let cb;
     let readRecord = (function(options) {
       options.command = ICC_COMMAND_READ_RECORD;
       options.p1 = options.recordNumber || 1; // Record number
       options.p2 = READ_RECORD_ABSOLUTE_MODE;
       options.p3 = options.recordSize;
       options.callback = cb || options.callback;
       this.context.RIL.iccIO(options);
     }).bind(this);
     options.type = EF_TYPE_LINEAR_FIXED;
     options.pathId = this.context.ICCFileHelper.getEFPath(options.fileId);
     if (options.recordSize) {
       readRecord(options);
       return;
     }
     cb = options.callback;
     options.callback = readRecord;
     this.getResponse(options);
   },
   /**
    * Load next record from current record Id.
    */
   loadNextRecord: function(options) {
     options.p1++;
     this.context.RIL.iccIO(options);
   },
   /**
    * Update EF with type 'Linear Fixed'.
    *
    * @param fileId
    *        The file to operate on, one of the ICC_EF_* constants.
    * @param recordNumber
    *        The number of the record shall be updated.
    * @param dataWriter [optional]
    *        The function for writing string parameter for the ICC_COMMAND_UPDATE_RECORD.
    * @param pin2 [optional]
    *        PIN2 is required when updating ICC_EF_FDN.
    * @param callback [optional]
    *        The callback function shall be called when the record is updated.
    * @param onerror [optional]
    *        The callback function shall be called when failure.
    */
   updateLinearFixedEF: function(options) {
     if (!options.fileId || !options.recordNumber) {
       throw new Error("Unexpected fileId " + options.fileId +
                       " or recordNumber " + options.recordNumber);
     }
     options.type = EF_TYPE_LINEAR_FIXED;
     options.pathId = this.context.ICCFileHelper.getEFPath(options.fileId);
     let cb = options.callback;
     options.callback = function callback(options) {
       options.callback = cb;
       options.command = ICC_COMMAND_UPDATE_RECORD;
       options.p1 = options.recordNumber;
       options.p2 = READ_RECORD_ABSOLUTE_MODE;
       options.p3 = options.recordSize;
       this.context.RIL.iccIO(options);
     }.bind(this);
     this.getResponse(options);
   },
   /**
    * Load EF with type 'Transparent'.
    *
    * @param fileId
    *        The file to operate on, one of the ICC_EF_* constants.
    * @param callback [optional]
    *        The callback function shall be called when the record(s) is read.
    * @param onerror [optional]
    *        The callback function shall be called when failure.
    */
   loadTransparentEF: function(options) {
     options.type = EF_TYPE_TRANSPARENT;
     let cb = options.callback;
     options.callback = function callback(options) {
       options.callback = cb;
       options.command = ICC_COMMAND_READ_BINARY;
       options.p3 = options.fileSize;
       this.context.RIL.iccIO(options);
     }.bind(this);
     this.getResponse(options);
   },
   /**
    * Use ICC_COMMAND_GET_RESPONSE to query the EF.
    *
    * @param fileId
    *        The file to operate on, one of the ICC_EF_* constants.
    */
   getResponse: function(options) {
     options.command = ICC_COMMAND_GET_RESPONSE;
     options.pathId = options.pathId ||
                      this.context.ICCFileHelper.getEFPath(options.fileId);
     if (!options.pathId) {
       throw new Error("Unknown pathId for " + options.fileId.toString(16));
     }
     options.p1 = 0; // For GET_RESPONSE, p1 = 0
     options.p2 = 0; // For GET_RESPONSE, p2 = 0
     options.p3 = GET_RESPONSE_EF_SIZE_BYTES;
     this.context.RIL.iccIO(options);
   },
   /**
    * Process ICC I/O response.
    */
   processICCIO: function(options) {
     let func = this[options.command];
     func.call(this, options);
   },
   /**
    * Process a ICC_COMMAND_GET_RESPONSE type command for REQUEST_SIM_IO.
    */
   processICCIOGetResponse: function(options) {
     let Buf = this.context.Buf;
     let strLen = Buf.readInt32();
     let peek = this.context.GsmPDUHelper.readHexOctet();
     Buf.seekIncoming(-1 * Buf.PDU_HEX_OCTET_SIZE);
     if (peek === BER_FCP_TEMPLATE_TAG) {
       this.processUSimGetResponse(options, strLen / 2);
     } else {
       this.processSimGetResponse(options);
     }
     Buf.readStringDelimiter(strLen);
     if (options.callback) {
       options.callback(options);
     }
   },
   /**
    * Helper function for processing USIM get response.
    */
   processUSimGetResponse: function(options, octetLen) {
     let BerTlvHelper = this.context.BerTlvHelper;
     let berTlv = BerTlvHelper.decode(octetLen);
     // See TS 102 221 Table 11.4 for the content order of getResponse.
     let iter = Iterator(berTlv.value);
     let tlv = BerTlvHelper.searchForNextTag(BER_FCP_FILE_DESCRIPTOR_TAG,
                                             iter);
     if (!tlv || (tlv.value.fileStructure !== UICC_EF_STRUCTURE[options.type])) {
       throw new Error("Expected EF type " + UICC_EF_STRUCTURE[options.type] +
                       " but read " + tlv.value.fileStructure);
     }
     if (tlv.value.fileStructure === UICC_EF_STRUCTURE[EF_TYPE_LINEAR_FIXED] ||
         tlv.value.fileStructure === UICC_EF_STRUCTURE[EF_TYPE_CYCLIC]) {
       options.recordSize = tlv.value.recordLength;
       options.totalRecords = tlv.value.numOfRecords;
     }
     tlv = BerTlvHelper.searchForNextTag(BER_FCP_FILE_IDENTIFIER_TAG, iter);
     if (!tlv || (tlv.value.fileId !== options.fileId)) {
       throw new Error("Expected file ID " + options.fileId.toString(16) +
                       " but read " + fileId.toString(16));
     }
     tlv = BerTlvHelper.searchForNextTag(BER_FCP_FILE_SIZE_DATA_TAG, iter);
     if (!tlv) {
       throw new Error("Unexpected file size data");
     }
     options.fileSize = tlv.value.fileSizeData;
   },
   /**
    * Helper function for processing SIM get response.
    */
   processSimGetResponse: function(options) {
     let Buf = this.context.Buf;
     let GsmPDUHelper = this.context.GsmPDUHelper;
     // The format is from TS 51.011, clause 9.2.1
     // Skip RFU, data[0] data[1].
     Buf.seekIncoming(2 * Buf.PDU_HEX_OCTET_SIZE);
     // File size, data[2], data[3]
     options.fileSize = (GsmPDUHelper.readHexOctet() << 8) |
                         GsmPDUHelper.readHexOctet();
     // 2 bytes File id. data[4], data[5]
     let fileId = (GsmPDUHelper.readHexOctet() << 8) |
                   GsmPDUHelper.readHexOctet();
     if (fileId != options.fileId) {
       throw new Error("Expected file ID " + options.fileId.toString(16) +
                       " but read " + fileId.toString(16));
     }
     // Type of file, data[6]
     let fileType = GsmPDUHelper.readHexOctet();
     if (fileType != TYPE_EF) {
       throw new Error("Unexpected file type " + fileType);
     }
     // Skip 1 byte RFU, data[7],
     //      3 bytes Access conditions, data[8] data[9] data[10],
     //      1 byte File status, data[11],
     //      1 byte Length of the following data, data[12].
     Buf.seekIncoming(((RESPONSE_DATA_STRUCTURE - RESPONSE_DATA_FILE_TYPE - 1) *
         Buf.PDU_HEX_OCTET_SIZE));
     // Read Structure of EF, data[13]
     let efType = GsmPDUHelper.readHexOctet();
     if (efType != options.type) {
       throw new Error("Expected EF type " + options.type + " but read " + efType);
     }
     // TODO: Bug 952025.
     // Length of a record, data[14].
     // Only available for LINEAR_FIXED and CYCLIC.
     if (efType == EF_TYPE_LINEAR_FIXED || efType == EF_TYPE_CYCLIC) {
       options.recordSize = GsmPDUHelper.readHexOctet();
       options.totalRecords = options.fileSize / options.recordSize;
     } else {
       Buf.seekIncoming(1 * Buf.PDU_HEX_OCTET_SIZE);
     }
   },
   /**
    * Process a ICC_COMMAND_READ_RECORD type command for REQUEST_SIM_IO.
    */
   processICCIOReadRecord: function(options) {
     if (options.callback) {
       options.callback(options);
     }
   },
   /**
    * Process a ICC_COMMAND_READ_BINARY type command for REQUEST_SIM_IO.
    */
   processICCIOReadBinary: function(options) {
     if (options.callback) {
       options.callback(options);
     }
   },
   /**
    * Process a ICC_COMMAND_UPDATE_RECORD type command for REQUEST_SIM_IO.
    */
   processICCIOUpdateRecord: function(options) {
     if (options.callback) {
       options.callback(options);
     }
   },
   /**
    * Process ICC IO error.
    */
   processICCIOError: function(options) {
     let requestError = RIL_ERROR_TO_GECKO_ERROR[options.rilRequestError];
     if (DEBUG) {
       // See GSM11.11, TS 51.011 clause 9.4, and ISO 7816-4 for the error
       // description.
       let errorMsg = "ICC I/O Error code " + requestError +
                      " EF id = " + options.fileId.toString(16) +
                      " command = " + options.command.toString(16);
       if (options.sw1 && options.sw2) {
         errorMsg += "(" + options.sw1.toString(16) +
                     "/" + options.sw2.toString(16) + ")";
       }
       this.context.debug(errorMsg);
     }
     if (options.onerror) {
       options.onerror(requestError);
     }
   },
 };
 ICCIOHelperObject.prototype[ICC_COMMAND_SEEK] = null;
 ICCIOHelperObject.prototype[ICC_COMMAND_READ_BINARY] = function ICC_COMMAND_READ_BINARY(options) {
   this.processICCIOReadBinary(options);
 };
 ICCIOHelperObject.prototype[ICC_COMMAND_READ_RECORD] = function ICC_COMMAND_READ_RECORD(options) {
   this.processICCIOReadRecord(options);
 };
 ICCIOHelperObject.prototype[ICC_COMMAND_GET_RESPONSE] = function ICC_COMMAND_GET_RESPONSE(options) {
   this.processICCIOGetResponse(options);
 };
 ICCIOHelperObject.prototype[ICC_COMMAND_UPDATE_BINARY] = null;
 ICCIOHelperObject.prototype[ICC_COMMAND_UPDATE_RECORD] = function ICC_COMMAND_UPDATE_RECORD(options) {
   this.processICCIOUpdateRecord(options);
 };
 /**
  * Helper for ICC records.
  */
 function ICCRecordHelperObject(aContext) {
   this.context = aContext;
 }
 ICCRecordHelperObject.prototype = {
   context: null,
   /**
    * Fetch ICC records.
    */
   fetchICCRecords: function() {
     switch (this.context.RIL.appType) {
       case CARD_APPTYPE_SIM:
       case CARD_APPTYPE_USIM:
         this.context.SimRecordHelper.fetchSimRecords();
         break;
       case CARD_APPTYPE_RUIM:
         this.context.RuimRecordHelper.fetchRuimRecords();
         break;
     }
   },
   /**
    * Read the ICCID.
    */
   readICCID: function() {
     function callback() {
       let Buf = this.context.Buf;
       let RIL = this.context.RIL;
       let strLen = Buf.readInt32();
       let octetLen = strLen / 2;
       RIL.iccInfo.iccid =
         this.context.GsmPDUHelper.readSwappedNibbleBcdString(octetLen, true);
       // Consumes the remaining buffer if any.
       let unReadBuffer = this.context.Buf.getReadAvailable() -
                          this.context.Buf.PDU_HEX_OCTET_SIZE;
       if (unReadBuffer > 0) {
         this.context.Buf.seekIncoming(unReadBuffer);
       }
       Buf.readStringDelimiter(strLen);
       if (DEBUG) this.context.debug("ICCID: " + RIL.iccInfo.iccid);
       if (RIL.iccInfo.iccid) {
         this.context.ICCUtilsHelper.handleICCInfoChange();
         RIL.reportStkServiceIsRunning();
       }
     }
     this.context.ICCIOHelper.loadTransparentEF({
       fileId: ICC_EF_ICCID,
       callback: callback.bind(this)
     });
   },
   /**
    * Read ICC ADN like EF, i.e. EF_ADN, EF_FDN.
    *
    * @param fileId      EF id of the ADN or FDN.
    * @param onsuccess   Callback to be called when success.
    * @param onerror     Callback to be called when error.
    */
   readADNLike: function(fileId, onsuccess, onerror) {
     let ICCIOHelper = this.context.ICCIOHelper;
     function callback(options) {
       let contact =
         this.context.ICCPDUHelper.readAlphaIdDiallingNumber(options.recordSize);
       if (contact) {
         contact.recordId = options.p1;
         contacts.push(contact);
       }
       if (options.p1 < options.totalRecords) {
         ICCIOHelper.loadNextRecord(options);
       } else {
         if (DEBUG) {
           for (let i = 0; i < contacts.length; i++) {
             this.context.debug("contact [" + i + "] " +
                                JSON.stringify(contacts[i]));
           }
         }
         if (onsuccess) {
           onsuccess(contacts);
         }
       }
     }
     let contacts = [];
     ICCIOHelper.loadLinearFixedEF({fileId: fileId,
                                    callback: callback.bind(this),
                                    onerror: onerror});
   },
   /**
    * Update ICC ADN like EFs, like EF_ADN, EF_FDN.
    *
    * @param fileId      EF id of the ADN or FDN.
    * @param contact     The contact will be updated. (Shall have recordId property)
    * @param pin2        PIN2 is required when updating ICC_EF_FDN.
    * @param onsuccess   Callback to be called when success.
    * @param onerror     Callback to be called when error.
    */
   updateADNLike: function(fileId, contact, pin2, onsuccess, onerror) {
     function dataWriter(recordSize) {
       this.context.ICCPDUHelper.writeAlphaIdDiallingNumber(recordSize,
                                                            contact.alphaId,
                                                            contact.number);
     }
     function callback(options) {
       if (onsuccess) {
         onsuccess();
       }
     }
     if (!contact || !contact.recordId) {
       if (onerror) onerror(GECKO_ERROR_INVALID_PARAMETER);
       return;
     }
     this.context.ICCIOHelper.updateLinearFixedEF({
       fileId: fileId,
       recordNumber: contact.recordId,
       dataWriter: dataWriter.bind(this),
       pin2: pin2,
       callback: callback.bind(this),
       onerror: onerror
     });
   },
   /**
    * Read USIM/RUIM Phonebook.
    *
    * @param onsuccess   Callback to be called when success.
    * @param onerror     Callback to be called when error.
    */
   readPBR: function(onsuccess, onerror) {
     let Buf = this.context.Buf;
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let ICCIOHelper = this.context.ICCIOHelper;
     let ICCUtilsHelper = this.context.ICCUtilsHelper;
     let RIL = this.context.RIL;
     function callback(options) {
       let strLen = Buf.readInt32();
       let octetLen = strLen / 2, readLen = 0;
       let pbrTlvs = [];
       while (readLen < octetLen) {
         let tag = GsmPDUHelper.readHexOctet();
         if (tag == 0xff) {
           readLen++;
           Buf.seekIncoming((octetLen - readLen) * Buf.PDU_HEX_OCTET_SIZE);
           break;
         }
         let tlvLen = GsmPDUHelper.readHexOctet();
         let tlvs = ICCUtilsHelper.decodeSimTlvs(tlvLen);
         pbrTlvs.push({tag: tag,
                       length: tlvLen,
                       value: tlvs});
         readLen += tlvLen + 2; // +2 for tag and tlvLen
       }
       Buf.readStringDelimiter(strLen);
       if (pbrTlvs.length > 0) {
         let pbr = ICCUtilsHelper.parsePbrTlvs(pbrTlvs);
         // EF_ADN is mandatory if and only if DF_PHONEBOOK is present.
         if (!pbr.adn) {
           if (onerror) onerror("Cannot access ADN.");
           return;
         }
         pbrs.push(pbr);
       }
       if (options.p1 < options.totalRecords) {
         ICCIOHelper.loadNextRecord(options);
       } else {
         if (onsuccess) {
           RIL.iccInfoPrivate.pbrs = pbrs;
           onsuccess(pbrs);
         }
       }
     }
     if (RIL.iccInfoPrivate.pbrs) {
       onsuccess(RIL.iccInfoPrivate.pbrs);
       return;
     }
     let pbrs = [];
     ICCIOHelper.loadLinearFixedEF({fileId : ICC_EF_PBR,
                                    callback: callback.bind(this),
                                    onerror: onerror});
   },
   /**
    * Cache EF_IAP record size.
    */
   _iapRecordSize: null,
   /**
    * Read ICC EF_IAP. (Index Administration Phonebook)
    *
    * @see TS 131.102, clause 4.4.2.2
    *
    * @param fileId       EF id of the IAP.
    * @param recordNumber The number of the record shall be loaded.
    * @param onsuccess    Callback to be called when success.
    * @param onerror      Callback to be called when error.
    */
   readIAP: function(fileId, recordNumber, onsuccess, onerror) {
     function callback(options) {
       let Buf = this.context.Buf;
       let strLen = Buf.readInt32();
       let octetLen = strLen / 2;
       this._iapRecordSize = options.recordSize;
       let iap = this.context.GsmPDUHelper.readHexOctetArray(octetLen);
       Buf.readStringDelimiter(strLen);
       if (onsuccess) {
         onsuccess(iap);
       }
     }
     this.context.ICCIOHelper.loadLinearFixedEF({
       fileId: fileId,
       recordNumber: recordNumber,
       recordSize: this._iapRecordSize,
       callback: callback.bind(this),
       onerror: onerror
     });
   },
   /**
    * Update USIM/RUIM Phonebook EF_IAP.
    *
    * @see TS 131.102, clause 4.4.2.13
    *
    * @param fileId       EF id of the IAP.
    * @param recordNumber The identifier of the record shall be updated.
    * @param iap          The IAP value to be written.
    * @param onsuccess    Callback to be called when success.
    * @param onerror      Callback to be called when error.
    */
   updateIAP: function(fileId, recordNumber, iap, onsuccess, onerror) {
     let dataWriter = function dataWriter(recordSize) {
       let Buf = this.context.Buf;
       let GsmPDUHelper = this.context.GsmPDUHelper;
       // Write String length
       let strLen = recordSize * 2;
       Buf.writeInt32(strLen);
       for (let i = 0; i < iap.length; i++) {
         GsmPDUHelper.writeHexOctet(iap[i]);
       }
       Buf.writeStringDelimiter(strLen);
     }.bind(this);
     this.context.ICCIOHelper.updateLinearFixedEF({
       fileId: fileId,
       recordNumber: recordNumber,
       dataWriter: dataWriter,
       callback: onsuccess,
       onerror: onerror
     });
   },
   /**
    * Cache EF_Email record size.
    */
   _emailRecordSize: null,
   /**
    * Read USIM/RUIM Phonebook EF_EMAIL.
    *
    * @see TS 131.102, clause 4.4.2.13
    *
    * @param fileId       EF id of the EMAIL.
    * @param fileType     The type of the EMAIL, one of the ICC_USIM_TYPE* constants.
    * @param recordNumber The number of the record shall be loaded.
    * @param onsuccess    Callback to be called when success.
    * @param onerror      Callback to be called when error.
    */
   readEmail: function(fileId, fileType, recordNumber, onsuccess, onerror) {
     function callback(options) {
       let Buf = this.context.Buf;
       let ICCPDUHelper = this.context.ICCPDUHelper;
       let strLen = Buf.readInt32();
       let octetLen = strLen / 2;
       let email = null;
       this._emailRecordSize = options.recordSize;
       // Read contact's email
       //
       // | Byte     | Description                 | Length | M/O
       // | 1 ~ X    | E-mail Address              |   X    |  M
       // | X+1      | ADN file SFI                |   1    |  C
       // | X+2      | ADN file Record Identifier  |   1    |  C
       // Note: The fields marked as C above are mandatort if the file
       //       is not type 1 (as specified in EF_PBR)
       if (fileType == ICC_USIM_TYPE1_TAG) {
         email = ICCPDUHelper.read8BitUnpackedToString(octetLen);
       } else {
         email = ICCPDUHelper.read8BitUnpackedToString(octetLen - 2);
         // Consumes the remaining buffer
         Buf.seekIncoming(2 * Buf.PDU_HEX_OCTET_SIZE); // For ADN SFI and Record Identifier
       }
       Buf.readStringDelimiter(strLen);
       if (onsuccess) {
         onsuccess(email);
       }
     }
     this.context.ICCIOHelper.loadLinearFixedEF({
       fileId: fileId,
       recordNumber: recordNumber,
       recordSize: this._emailRecordSize,
       callback: callback.bind(this),
       onerror: onerror
     });
   },
   /**
    * Update USIM/RUIM Phonebook EF_EMAIL.
    *
    * @see TS 131.102, clause 4.4.2.13
    *
    * @param pbr          Phonebook Reference File.
    * @param recordNumber The identifier of the record shall be updated.
    * @param email        The value to be written.
    * @param adnRecordId  The record Id of ADN, only needed if the fileType of Email is TYPE2.
    * @param onsuccess    Callback to be called when success.
    * @param onerror      Callback to be called when error.
    */
   updateEmail: function(pbr, recordNumber, email, adnRecordId, onsuccess, onerror) {
     let fileId = pbr[USIM_PBR_EMAIL].fileId;
     let fileType = pbr[USIM_PBR_EMAIL].fileType;
     let dataWriter = function dataWriter(recordSize) {
       let Buf = this.context.Buf;
       let GsmPDUHelper = this.context.GsmPDUHelper;
       let ICCPDUHelper = this.context.ICCPDUHelper;
       // Write String length
       let strLen = recordSize * 2;
       Buf.writeInt32(strLen);
       if (fileType == ICC_USIM_TYPE1_TAG) {
         ICCPDUHelper.writeStringTo8BitUnpacked(recordSize, email);
       } else {
         ICCPDUHelper.writeStringTo8BitUnpacked(recordSize - 2, email);
         GsmPDUHelper.writeHexOctet(pbr.adn.sfi || 0xff);
         GsmPDUHelper.writeHexOctet(adnRecordId);
       }
       Buf.writeStringDelimiter(strLen);
     }.bind(this);
     this.context.ICCIOHelper.updateLinearFixedEF({
       fileId: fileId,
       recordNumber: recordNumber,
       dataWriter: dataWriter,
       callback: onsuccess,
       onerror: onerror
     });
   },
   /**
    * Cache EF_ANR record size.
    */
   _anrRecordSize: null,
   /**
    * Read USIM/RUIM Phonebook EF_ANR.
    *
    * @see TS 131.102, clause 4.4.2.9
    *
    * @param fileId       EF id of the ANR.
    * @param fileType     One of the ICC_USIM_TYPE* constants.
    * @param recordNumber The number of the record shall be loaded.
    * @param onsuccess    Callback to be called when success.
    * @param onerror      Callback to be called when error.
    */
   readANR: function(fileId, fileType, recordNumber, onsuccess, onerror) {
     function callback(options) {
       let Buf = this.context.Buf;
       let strLen = Buf.readInt32();
       let number = null;
       this._anrRecordSize = options.recordSize;
       // Skip EF_AAS Record ID.
       Buf.seekIncoming(1 * Buf.PDU_HEX_OCTET_SIZE);
       number = this.context.ICCPDUHelper.readNumberWithLength();
       // Skip 2 unused octets, CCP and EXT1.
       Buf.seekIncoming(2 * Buf.PDU_HEX_OCTET_SIZE);
       // For Type 2 there are two extra octets.
       if (fileType == ICC_USIM_TYPE2_TAG) {
         // Skip 2 unused octets, ADN SFI and Record Identifier.
         Buf.seekIncoming(2 * Buf.PDU_HEX_OCTET_SIZE);
       }
       Buf.readStringDelimiter(strLen);
       if (onsuccess) {
         onsuccess(number);
       }
     }
     this.context.ICCIOHelper.loadLinearFixedEF({
       fileId: fileId,
       recordNumber: recordNumber,
       recordSize: this._anrRecordSize,
       callback: callback.bind(this),
       onerror: onerror
     });
   },
   /**
    * Update USIM/RUIM Phonebook EF_ANR.
    *
    * @see TS 131.102, clause 4.4.2.9
    *
    * @param pbr          Phonebook Reference File.
    * @param recordNumber The identifier of the record shall be updated.
    * @param number       The value to be written.
    * @param adnRecordId  The record Id of ADN, only needed if the fileType of Email is TYPE2.
    * @param onsuccess    Callback to be called when success.
    * @param onerror      Callback to be called when error.
    */
   updateANR: function(pbr, recordNumber, number, adnRecordId, onsuccess, onerror) {
     let fileId = pbr[USIM_PBR_ANR0].fileId;
     let fileType = pbr[USIM_PBR_ANR0].fileType;
     let dataWriter = function dataWriter(recordSize) {
       let Buf = this.context.Buf;
       let GsmPDUHelper = this.context.GsmPDUHelper;
       // Write String length
       let strLen = recordSize * 2;
       Buf.writeInt32(strLen);
       // EF_AAS record Id. Unused for now.
       GsmPDUHelper.writeHexOctet(0xff);
       this.context.ICCPDUHelper.writeNumberWithLength(number);
       // Write unused octets 0xff, CCP and EXT1.
       GsmPDUHelper.writeHexOctet(0xff);
       GsmPDUHelper.writeHexOctet(0xff);
       // For Type 2 there are two extra octets.
       if (fileType == ICC_USIM_TYPE2_TAG) {
         GsmPDUHelper.writeHexOctet(pbr.adn.sfi || 0xff);
         GsmPDUHelper.writeHexOctet(adnRecordId);
       }
       Buf.writeStringDelimiter(strLen);
     }.bind(this);
     this.context.ICCIOHelper.updateLinearFixedEF({
       fileId: fileId,
       recordNumber: recordNumber,
       dataWriter: dataWriter,
       callback: onsuccess,
       onerror: onerror
     });
   },
   /**
    * Find free record id.
    *
    * @param fileId      EF id.
    * @param onsuccess   Callback to be called when success.
    * @param onerror     Callback to be called when error.
    */
   findFreeRecordId: function(fileId, onsuccess, onerror) {
     let ICCIOHelper = this.context.ICCIOHelper;
     function callback(options) {
       let Buf = this.context.Buf;
       let GsmPDUHelper = this.context.GsmPDUHelper;
       let strLen = Buf.readInt32();
       let octetLen = strLen / 2;
       let readLen = 0;
       while (readLen < octetLen) {
         let octet = GsmPDUHelper.readHexOctet();
         readLen++;
         if (octet != 0xff) {
           break;
         }
       }
       if (readLen == octetLen) {
         // Find free record.
         if (onsuccess) {
           onsuccess(options.p1);
         }
         return;
       } else {
         Buf.seekIncoming((octetLen - readLen) * Buf.PDU_HEX_OCTET_SIZE);
       }
       Buf.readStringDelimiter(strLen);
       if (options.p1 < options.totalRecords) {
         ICCIOHelper.loadNextRecord(options);
       } else {
         // No free record found.
         if (DEBUG) {
           this.context.debug(CONTACT_ERR_NO_FREE_RECORD_FOUND);
         }
         onerror(CONTACT_ERR_NO_FREE_RECORD_FOUND);
       }
     }
     ICCIOHelper.loadLinearFixedEF({fileId: fileId,
                                    callback: callback.bind(this),
                                    onerror: onerror});
   },
 };
 /**
  * Helper for (U)SIM Records.
  */
 function SimRecordHelperObject(aContext) {
   this.context = aContext;
 }
 SimRecordHelperObject.prototype = {
   context: null,
   /**
    * Fetch (U)SIM records.
    */
   fetchSimRecords: function() {
     this.context.RIL.getIMSI();
     this.readAD();
     this.readSST();
   },
   /**
    * Read EF_phase.
    * This EF is only available in SIM.
    */
   readSimPhase: function() {
     function callback() {
       let Buf = this.context.Buf;
       let strLen = Buf.readInt32();
       let GsmPDUHelper = this.context.GsmPDUHelper;
       let phase = GsmPDUHelper.readHexOctet();
       // If EF_phase is coded '03' or greater, an ME supporting STK shall
       // perform the PROFILE DOWNLOAD procedure.
       if (RILQUIRKS_SEND_STK_PROFILE_DOWNLOAD &&
           phase >= ICC_PHASE_2_PROFILE_DOWNLOAD_REQUIRED) {
         this.context.RIL.sendStkTerminalProfile(STK_SUPPORTED_TERMINAL_PROFILE);
       }
       Buf.readStringDelimiter(strLen);
     }
     this.context.ICCIOHelper.loadTransparentEF({
       fileId: ICC_EF_PHASE,
       callback: callback.bind(this)
     });
   },
   /**
    * Read the MSISDN from the (U)SIM.
    */
   readMSISDN: function() {
     function callback(options) {
       let RIL = this.context.RIL;
       let contact =
         this.context.ICCPDUHelper.readAlphaIdDiallingNumber(options.recordSize);
       if (!contact ||
           (RIL.iccInfo.msisdn !== undefined &&
            RIL.iccInfo.msisdn === contact.number)) {
         return;
       }
       RIL.iccInfo.msisdn = contact.number;
       if (DEBUG) this.context.debug("MSISDN: " + RIL.iccInfo.msisdn);
       this.context.ICCUtilsHelper.handleICCInfoChange();
     }
     this.context.ICCIOHelper.loadLinearFixedEF({
       fileId: ICC_EF_MSISDN,
       callback: callback.bind(this)
     });
   },
   /**
    * Read the AD (Administrative Data) from the (U)SIM.
    */
   readAD: function() {
     function callback() {
       let Buf = this.context.Buf;
       let strLen = Buf.readInt32();
       // Each octet is encoded into two chars.
       let octetLen = strLen / 2;
       let ad = this.context.GsmPDUHelper.readHexOctetArray(octetLen);
       Buf.readStringDelimiter(strLen);
       if (DEBUG) {
         let str = "";
         for (let i = 0; i < ad.length; i++) {
           str += ad[i] + ", ";
         }
         this.context.debug("AD: " + str);
       }
       let ICCUtilsHelper = this.context.ICCUtilsHelper;
       let RIL = this.context.RIL;
       // The 4th byte of the response is the length of MNC.
       let mccMnc = ICCUtilsHelper.parseMccMncFromImsi(RIL.iccInfoPrivate.imsi,
                                                       ad && ad[3]);
       if (mccMnc) {
         RIL.iccInfo.mcc = mccMnc.mcc;
         RIL.iccInfo.mnc = mccMnc.mnc;
         ICCUtilsHelper.handleICCInfoChange();
       }
     }
     this.context.ICCIOHelper.loadTransparentEF({
       fileId: ICC_EF_AD,
       callback: callback.bind(this)
     });
   },
   /**
    * Read the SPN (Service Provider Name) from the (U)SIM.
    */
   readSPN: function() {
     function callback() {
       let Buf = this.context.Buf;
       let strLen = Buf.readInt32();
       // Each octet is encoded into two chars.
       let octetLen = strLen / 2;
       let spnDisplayCondition = this.context.GsmPDUHelper.readHexOctet();
       // Minus 1 because the first octet is used to store display condition.
       let spn = this.context.ICCPDUHelper.readAlphaIdentifier(octetLen - 1);
       Buf.readStringDelimiter(strLen);
       if (DEBUG) {
         this.context.debug("SPN: spn = " + spn +
                            ", spnDisplayCondition = " + spnDisplayCondition);
       }
       let RIL = this.context.RIL;
       RIL.iccInfoPrivate.spnDisplayCondition = spnDisplayCondition;
       RIL.iccInfo.spn = spn;
       let ICCUtilsHelper = this.context.ICCUtilsHelper;
       ICCUtilsHelper.updateDisplayCondition();
       ICCUtilsHelper.handleICCInfoChange();
     }
     this.context.ICCIOHelper.loadTransparentEF({
       fileId: ICC_EF_SPN,
       callback: callback.bind(this)
     });
   },
   /**
    * Read the (U)SIM Service Table from the (U)SIM.
    */
   readSST: function() {
     function callback() {
       let Buf = this.context.Buf;
       let RIL = this.context.RIL;
       let strLen = Buf.readInt32();
       // Each octet is encoded into two chars.
       let octetLen = strLen / 2;
       let sst = this.context.GsmPDUHelper.readHexOctetArray(octetLen);
       Buf.readStringDelimiter(strLen);
       RIL.iccInfoPrivate.sst = sst;
       if (DEBUG) {
         let str = "";
         for (let i = 0; i < sst.length; i++) {
           str += sst[i] + ", ";
         }
         this.context.debug("SST: " + str);
       }
       let ICCUtilsHelper = this.context.ICCUtilsHelper;
       if (ICCUtilsHelper.isICCServiceAvailable("MSISDN")) {
         if (DEBUG) this.context.debug("MSISDN: MSISDN is available");
         this.readMSISDN();
       } else {
         if (DEBUG) this.context.debug("MSISDN: MSISDN service is not available");
       }
       // Fetch SPN and PLMN list, if some of them are available.
       if (ICCUtilsHelper.isICCServiceAvailable("SPN")) {
         if (DEBUG) this.context.debug("SPN: SPN is available");
         this.readSPN();
       } else {
         if (DEBUG) this.context.debug("SPN: SPN service is not available");
       }
       if (ICCUtilsHelper.isICCServiceAvailable("MDN")) {
         if (DEBUG) this.context.debug("MDN: MDN available.");
         this.readMBDN();
       } else {
         if (DEBUG) this.context.debug("MDN: MDN service is not available");
       }
       if (ICCUtilsHelper.isICCServiceAvailable("MWIS")) {
         if (DEBUG) this.context.debug("MWIS: MWIS is available");
         this.readMWIS();
       } else {
         if (DEBUG) this.context.debug("MWIS: MWIS is not available");
       }
       if (ICCUtilsHelper.isICCServiceAvailable("SPDI")) {
         if (DEBUG) this.context.debug("SPDI: SPDI available.");
         this.readSPDI();
       } else {
         if (DEBUG) this.context.debug("SPDI: SPDI service is not available");
       }
       if (ICCUtilsHelper.isICCServiceAvailable("PNN")) {
         if (DEBUG) this.context.debug("PNN: PNN is available");
         this.readPNN();
       } else {
         if (DEBUG) this.context.debug("PNN: PNN is not available");
       }
       if (ICCUtilsHelper.isICCServiceAvailable("OPL")) {
         if (DEBUG) this.context.debug("OPL: OPL is available");
         this.readOPL();
       } else {
         if (DEBUG) this.context.debug("OPL: OPL is not available");
       }
       if (ICCUtilsHelper.isICCServiceAvailable("CBMI")) {
         this.readCBMI();
       } else {
         RIL.cellBroadcastConfigs.CBMI = null;
       }
       if (ICCUtilsHelper.isICCServiceAvailable("DATA_DOWNLOAD_SMS_CB")) {
         this.readCBMID();
       } else {
         RIL.cellBroadcastConfigs.CBMID = null;
       }
       if (ICCUtilsHelper.isICCServiceAvailable("CBMIR")) {
         this.readCBMIR();
       } else {
         RIL.cellBroadcastConfigs.CBMIR = null;
       }
       RIL._mergeAllCellBroadcastConfigs();
     }
     // ICC_EF_UST has the same value with ICC_EF_SST.
     this.context.ICCIOHelper.loadTransparentEF({
       fileId: ICC_EF_SST,
       callback: callback.bind(this)
     });
   },
   /**
    * Read (U)SIM MBDN. (Mailbox Dialling Number)
    *
    * @see TS 131.102, clause 4.2.60
    */
   readMBDN: function() {
     function callback(options) {
       let RIL = this.context.RIL;
       let contact =
         this.context.ICCPDUHelper.readAlphaIdDiallingNumber(options.recordSize);
       if (!contact ||
           (RIL.iccInfoPrivate.mbdn !== undefined &&
            RIL.iccInfoPrivate.mbdn === contact.number)) {
         return;
       }
       RIL.iccInfoPrivate.mbdn = contact.number;
       if (DEBUG) {
         this.context.debug("MBDN, alphaId=" + contact.alphaId +
                            " number=" + contact.number);
       }
       contact.rilMessageType = "iccmbdn";
       RIL.sendChromeMessage(contact);
     }
     this.context.ICCIOHelper.loadLinearFixedEF({
       fileId: ICC_EF_MBDN,
       callback: callback.bind(this)
     });
   },
   /**
    * Read ICC MWIS. (Message Waiting Indication Status)
    *
    * @see TS 31.102, clause 4.2.63 for USIM and TS 51.011, clause 10.3.45 for SIM.
    */
   readMWIS: function() {
     function callback(options) {
       let Buf = this.context.Buf;
       let RIL = this.context.RIL;
       let strLen = Buf.readInt32();
       // Each octet is encoded into two chars.
       let octetLen = strLen / 2;
       let mwis = this.context.GsmPDUHelper.readHexOctetArray(octetLen);
       Buf.readStringDelimiter(strLen);
       if (!mwis) {
         return;
       }
       RIL.iccInfoPrivate.mwis = mwis; //Keep raw MWIS for updateMWIS()
       let mwi = {};
       // b8 b7 B6 b5 b4 b3 b2 b1   4.2.63, TS 31.102 version 11.6.0
       //  |  |  |  |  |  |  |  |__ Voicemail
       //  |  |  |  |  |  |  |_____ Fax
       //  |  |  |  |  |  |________ Electronic Mail
       //  |  |  |  |  |___________ Other
       //  |  |  |  |______________ Videomail
       //  |__|__|_________________ RFU
       mwi.active = ((mwis[0] & 0x01) != 0);
       if (mwi.active) {
         // In TS 23.040 msgCount is in the range from 0 to 255.
         // The value 255 shall be taken to mean 255 or greater.
         //
         // However, There is no definition about 0 when MWI is active.
         //
         // Normally, when mwi is active, the msgCount must be larger than 0.
         // Refer to other reference phone,
         // 0 is usually treated as UNKNOWN for storing 2nd level MWI status (DCS).
         mwi.msgCount = (mwis[1] === 0) ? GECKO_VOICEMAIL_MESSAGE_COUNT_UNKNOWN
                                        : mwis[1];
       } else {
         mwi.msgCount = 0;
       }
       RIL.sendChromeMessage({ rilMessageType: "iccmwis",
                               mwi: mwi });
     }
     this.context.ICCIOHelper.loadLinearFixedEF({
       fileId: ICC_EF_MWIS,
       recordNumber: 1, // Get 1st Subscriber Profile.
       callback: callback.bind(this)
     });
   },
   /**
    * Update ICC MWIS. (Message Waiting Indication Status)
    *
    * @see TS 31.102, clause 4.2.63 for USIM and TS 51.011, clause 10.3.45 for SIM.
    */
   updateMWIS: function(mwi) {
     let RIL = this.context.RIL;
     if (!RIL.iccInfoPrivate.mwis) {
       return;
     }
     function dataWriter(recordSize) {
       let mwis = RIL.iccInfoPrivate.mwis;
       let msgCount =
           (mwi.msgCount === GECKO_VOICEMAIL_MESSAGE_COUNT_UNKNOWN) ? 0 : mwi.msgCount;
       [mwis[0], mwis[1]] = (mwi.active) ? [(mwis[0] | 0x01), msgCount]
                                         : [(mwis[0] & 0xFE), 0];
       let strLen = recordSize * 2;
       let Buf = this.context.Buf;
       Buf.writeInt32(strLen);
       let GsmPDUHelper = this.context.GsmPDUHelper;
       for (let i = 0; i < mwis.length; i++) {
         GsmPDUHelper.writeHexOctet(mwis[i]);
       }
       Buf.writeStringDelimiter(strLen);
     }
     this.context.ICCIOHelper.updateLinearFixedEF({
       fileId: ICC_EF_MWIS,
       recordNumber: 1, // Update 1st Subscriber Profile.
       dataWriter: dataWriter.bind(this)
     });
   },
   /**
    * Read the SPDI (Service Provider Display Information) from the (U)SIM.
    *
    * See TS 131.102 section 4.2.66 for USIM and TS 51.011 section 10.3.50
    * for SIM.
    */
   readSPDI: function() {
     function callback() {
       let Buf = this.context.Buf;
       let strLen = Buf.readInt32();
       let octetLen = strLen / 2;
       let readLen = 0;
       let endLoop = false;
       let RIL = this.context.RIL;
       RIL.iccInfoPrivate.SPDI = null;
       let GsmPDUHelper = this.context.GsmPDUHelper;
       while ((readLen < octetLen) && !endLoop) {
         let tlvTag = GsmPDUHelper.readHexOctet();
         let tlvLen = GsmPDUHelper.readHexOctet();
         readLen += 2; // For tag and length fields.
         switch (tlvTag) {
         case SPDI_TAG_SPDI:
           // The value part itself is a TLV.
           continue;
         case SPDI_TAG_PLMN_LIST:
           // This PLMN list is what we want.
           RIL.iccInfoPrivate.SPDI = this.readPLMNEntries(tlvLen / 3);
           readLen += tlvLen;
           endLoop = true;
           break;
         default:
           // We don't care about its content if its tag is not SPDI nor
           // PLMN_LIST.
           endLoop = true;
           break;
         }
       }
       // Consume unread octets.
       Buf.seekIncoming((octetLen - readLen) * Buf.PDU_HEX_OCTET_SIZE);
       Buf.readStringDelimiter(strLen);
       if (DEBUG) {
         this.context.debug("SPDI: " + JSON.stringify(RIL.iccInfoPrivate.SPDI));
       }
       let ICCUtilsHelper = this.context.ICCUtilsHelper;
       if (ICCUtilsHelper.updateDisplayCondition()) {
         ICCUtilsHelper.handleICCInfoChange();
       }
     }
     // PLMN List is Servive 51 in USIM, EF_SPDI
     this.context.ICCIOHelper.loadTransparentEF({
       fileId: ICC_EF_SPDI,
       callback: callback.bind(this)
     });
   },
   _readCbmiHelper: function(which) {
     let RIL = this.context.RIL;
     function callback() {
       let Buf = this.context.Buf;
       let strLength = Buf.readInt32();
       // Each Message Identifier takes two octets and each octet is encoded
       // into two chars.
       let numIds = strLength / 4, list = null;
       if (numIds) {
         list = [];
         let GsmPDUHelper = this.context.GsmPDUHelper;
         for (let i = 0, id; i < numIds; i++) {
           id = GsmPDUHelper.readHexOctet() << 8 | GsmPDUHelper.readHexOctet();
           // `Unused entries shall be set to 'FF FF'.`
           if (id != 0xFFFF) {
             list.push(id);
             list.push(id + 1);
           }
         }
       }
       if (DEBUG) {
         this.context.debug(which + ": " + JSON.stringify(list));
       }
       Buf.readStringDelimiter(strLength);
       RIL.cellBroadcastConfigs[which] = list;
       RIL._mergeAllCellBroadcastConfigs();
     }
     function onerror() {
       RIL.cellBroadcastConfigs[which] = null;
       RIL._mergeAllCellBroadcastConfigs();
     }
     let fileId = GLOBAL["ICC_EF_" + which];
     this.context.ICCIOHelper.loadTransparentEF({
       fileId: fileId,
       callback: callback.bind(this),
       onerror: onerror.bind(this)
     });
   },
   /**
    * Read EFcbmi (Cell Broadcast Message Identifier selection)
    *
    * @see 3GPP TS 31.102 v110.02.0 section 4.2.14 EFcbmi
    * @see 3GPP TS 51.011 v5.0.0 section 10.3.13 EFcbmi
    */
   readCBMI: function() {
     this._readCbmiHelper("CBMI");
   },
   /**
    * Read EFcbmid (Cell Broadcast Message Identifier for Data Download)
    *
    * @see 3GPP TS 31.102 v110.02.0 section 4.2.20 EFcbmid
    * @see 3GPP TS 51.011 v5.0.0 section 10.3.26 EFcbmid
    */
   readCBMID: function() {
     this._readCbmiHelper("CBMID");
   },
   /**
    * Read EFcbmir (Cell Broadcast Message Identifier Range selection)
    *
    * @see 3GPP TS 31.102 v110.02.0 section 4.2.22 EFcbmir
    * @see 3GPP TS 51.011 v5.0.0 section 10.3.28 EFcbmir
    */
   readCBMIR: function() {
     let RIL = this.context.RIL;
     function callback() {
       let Buf = this.context.Buf;
       let strLength = Buf.readInt32();
       // Each Message Identifier range takes four octets and each octet is
       // encoded into two chars.
       let numIds = strLength / 8, list = null;
       if (numIds) {
         list = [];
         let GsmPDUHelper = this.context.GsmPDUHelper;
         for (let i = 0, from, to; i < numIds; i++) {
           // `Bytes one and two of each range identifier equal the lower value
           // of a cell broadcast range, bytes three and four equal the upper
           // value of a cell broadcast range.`
           from = GsmPDUHelper.readHexOctet() << 8 | GsmPDUHelper.readHexOctet();
           to = GsmPDUHelper.readHexOctet() << 8 | GsmPDUHelper.readHexOctet();
           // `Unused entries shall be set to 'FF FF'.`
           if ((from != 0xFFFF) && (to != 0xFFFF)) {
             list.push(from);
             list.push(to + 1);
           }
         }
       }
       if (DEBUG) {
         this.context.debug("CBMIR: " + JSON.stringify(list));
       }
       Buf.readStringDelimiter(strLength);
       RIL.cellBroadcastConfigs.CBMIR = list;
       RIL._mergeAllCellBroadcastConfigs();
     }
     function onerror() {
       RIL.cellBroadcastConfigs.CBMIR = null;
       RIL._mergeAllCellBroadcastConfigs();
     }
     this.context.ICCIOHelper.loadTransparentEF({
       fileId: ICC_EF_CBMIR,
       callback: callback.bind(this),
       onerror: onerror.bind(this)
     });
   },
   /**
    * Read OPL (Operator PLMN List) from (U)SIM.
    *
    * See 3GPP TS 31.102 Sec. 4.2.59 for USIM
    *     3GPP TS 51.011 Sec. 10.3.42 for SIM.
    */
   readOPL: function() {
     let ICCIOHelper = this.context.ICCIOHelper;
     let opl = [];
     function callback(options) {
       let Buf = this.context.Buf;
       let GsmPDUHelper = this.context.GsmPDUHelper;
       let strLen = Buf.readInt32();
       // The first 7 bytes are LAI (for UMTS) and the format of LAI is defined
       // in 3GPP TS 23.003, Sec 4.1
       //    +-------------+---------+
       //    | Octet 1 - 3 | MCC/MNC |
       //    +-------------+---------+
       //    | Octet 4 - 7 |   LAC   |
       //    +-------------+---------+
       let mccMnc = [GsmPDUHelper.readHexOctet(),
                     GsmPDUHelper.readHexOctet(),
                     GsmPDUHelper.readHexOctet()];
       if (mccMnc[0] != 0xFF || mccMnc[1] != 0xFF || mccMnc[2] != 0xFF) {
         let oplElement = {};
         let semiOctets = [];
         for (let i = 0; i < mccMnc.length; i++) {
           semiOctets.push((mccMnc[i] & 0xf0) >> 4);
           semiOctets.push(mccMnc[i] & 0x0f);
         }
         let reformat = [semiOctets[1], semiOctets[0], semiOctets[3],
                         semiOctets[5], semiOctets[4], semiOctets[2]];
         let buf = "";
         for (let i = 0; i < reformat.length; i++) {
           if (reformat[i] != 0xF) {
             buf += GsmPDUHelper.semiOctetToBcdChar(reformat[i]);
           }
           if (i === 2) {
             // 0-2: MCC
             oplElement.mcc = buf;
             buf = "";
           } else if (i === 5) {
             // 3-5: MNC
             oplElement.mnc = buf;
           }
         }
         // LAC/TAC
         oplElement.lacTacStart =
           (GsmPDUHelper.readHexOctet() << 8) | GsmPDUHelper.readHexOctet();
         oplElement.lacTacEnd =
           (GsmPDUHelper.readHexOctet() << 8) | GsmPDUHelper.readHexOctet();
         // PLMN Network Name Record Identifier
         oplElement.pnnRecordId = GsmPDUHelper.readHexOctet();
         if (DEBUG) {
           this.context.debug("OPL: [" + (opl.length + 1) + "]: " +
                              JSON.stringify(oplElement));
         }
         opl.push(oplElement);
       } else {
         Buf.seekIncoming(5 * Buf.PDU_HEX_OCTET_SIZE);
       }
       Buf.readStringDelimiter(strLen);
       if (options.p1 < options.totalRecords) {
         ICCIOHelper.loadNextRecord(options);
       } else {
         this.context.RIL.iccInfoPrivate.OPL = opl;
       }
     }
     ICCIOHelper.loadLinearFixedEF({fileId: ICC_EF_OPL,
                                    callback: callback.bind(this)});
   },
   /**
    * Read PNN (PLMN Network Name) from (U)SIM.
    *
    * See 3GPP TS 31.102 Sec. 4.2.58 for USIM
    *     3GPP TS 51.011 Sec. 10.3.41 for SIM.
    */
   readPNN: function() {
     let ICCIOHelper = this.context.ICCIOHelper;
     function callback(options) {
       let pnnElement;
       let Buf = this.context.Buf;
       let strLen = Buf.readInt32();
       let octetLen = strLen / 2;
       let readLen = 0;
       let GsmPDUHelper = this.context.GsmPDUHelper;
       while (readLen < octetLen) {
         let tlvTag = GsmPDUHelper.readHexOctet();
         if (tlvTag == 0xFF) {
           // Unused byte
           readLen++;
           Buf.seekIncoming((octetLen - readLen) * Buf.PDU_HEX_OCTET_SIZE);
           break;
         }
         // Needs this check to avoid initializing twice.
         pnnElement = pnnElement || {};
         let tlvLen = GsmPDUHelper.readHexOctet();
         switch (tlvTag) {
           case PNN_IEI_FULL_NETWORK_NAME:
             pnnElement.fullName = GsmPDUHelper.readNetworkName(tlvLen);
             break;
           case PNN_IEI_SHORT_NETWORK_NAME:
             pnnElement.shortName = GsmPDUHelper.readNetworkName(tlvLen);
             break;
           default:
             Buf.seekIncoming(tlvLen * Buf.PDU_HEX_OCTET_SIZE);
             break;
         }
         readLen += (tlvLen + 2); // +2 for tlvTag and tlvLen
       }
       Buf.readStringDelimiter(strLen);
       if (pnnElement) {
         pnn.push(pnnElement);
       }
       // Will ignore remaining records when got the contents of a record are all 0xff.
       if (pnnElement && options.p1 < options.totalRecords) {
         ICCIOHelper.loadNextRecord(options);
       } else {
         if (DEBUG) {
           for (let i = 0; i < pnn.length; i++) {
             this.context.debug("PNN: [" + i + "]: " + JSON.stringify(pnn[i]));
           }
         }
         this.context.RIL.iccInfoPrivate.PNN = pnn;
       }
     }
     let pnn = [];
     ICCIOHelper.loadLinearFixedEF({fileId: ICC_EF_PNN,
                                    callback: callback.bind(this)});
   },
   /**
    *  Read the list of PLMN (Public Land Mobile Network) entries
    *  We cannot directly rely on readSwappedNibbleBcdToString(),
    *  since it will no correctly handle some corner-cases that are
    *  not a problem in our case (0xFF 0xFF 0xFF).
    *
    *  @param length The number of PLMN records.
    *  @return An array of string corresponding to the PLMNs.
    */
   readPLMNEntries: function(length) {
     let plmnList = [];
     // Each PLMN entry has 3 bytes.
     if (DEBUG) {
       this.context.debug("PLMN entries length = " + length);
     }
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let index = 0;
     while (index < length) {
       // Unused entries will be 0xFFFFFF, according to EF_SPDI
       // specs (TS 131 102, section 4.2.66)
       try {
         let plmn = [GsmPDUHelper.readHexOctet(),
                     GsmPDUHelper.readHexOctet(),
                     GsmPDUHelper.readHexOctet()];
         if (DEBUG) {
           this.context.debug("Reading PLMN entry: [" + index + "]: '" + plmn + "'");
         }
         if (plmn[0] != 0xFF &&
             plmn[1] != 0xFF &&
             plmn[2] != 0xFF) {
           let semiOctets = [];
           for (let idx = 0; idx < plmn.length; idx++) {
             semiOctets.push((plmn[idx] & 0xF0) >> 4);
             semiOctets.push(plmn[idx] & 0x0F);
           }
           // According to TS 24.301, 9.9.3.12, the semi octets is arranged
           // in format:
           // Byte 1: MCC[2] | MCC[1]
           // Byte 2: MNC[3] | MCC[3]
           // Byte 3: MNC[2] | MNC[1]
           // Therefore, we need to rearrange them.
           let reformat = [semiOctets[1], semiOctets[0], semiOctets[3],
                           semiOctets[5], semiOctets[4], semiOctets[2]];
           let buf = "";
           let plmnEntry = {};
           for (let i = 0; i < reformat.length; i++) {
             if (reformat[i] != 0xF) {
               buf += GsmPDUHelper.semiOctetToBcdChar(reformat[i]);
             }
             if (i === 2) {
               // 0-2: MCC
               plmnEntry.mcc = buf;
               buf = "";
             } else if (i === 5) {
               // 3-5: MNC
               plmnEntry.mnc = buf;
             }
           }
           if (DEBUG) {
             this.context.debug("PLMN = " + plmnEntry.mcc + ", " + plmnEntry.mnc);
           }
           plmnList.push(plmnEntry);
         }
       } catch (e) {
         if (DEBUG) {
           this.context.debug("PLMN entry " + index + " is invalid.");
         }
         break;
       }
       index ++;
     }
     return plmnList;
   },
   /**
    * Read the SMS from the ICC.
    *
    * @param recordNumber The number of the record shall be loaded.
    * @param onsuccess    Callback to be called when success.
    * @param onerror      Callback to be called when error.
    */
   readSMS: function(recordNumber, onsuccess, onerror) {
     function callback(options) {
       let Buf = this.context.Buf;
       let strLen = Buf.readInt32();
       // TS 51.011, 10.5.3 EF_SMS
       // b3 b2 b1
       //  0  0  1 message received by MS from network; message read
       //  0  1  1 message received by MS from network; message to be read
       //  1  1  1 MS originating message; message to be sent
       //  1  0  1 MS originating message; message sent to the network:
       let GsmPDUHelper = this.context.GsmPDUHelper;
       let status = GsmPDUHelper.readHexOctet();
       let message = GsmPDUHelper.readMessage();
       message.simStatus = status;
       // Consumes the remaining buffer
       Buf.seekIncoming(Buf.getReadAvailable() - Buf.PDU_HEX_OCTET_SIZE);
       Buf.readStringDelimiter(strLen);
       if (message) {
         onsuccess(message);
       } else {
         onerror("Failed to decode SMS on SIM #" + recordNumber);
       }
     }
     this.context.ICCIOHelper.loadLinearFixedEF({
       fileId: ICC_EF_SMS,
       recordNumber: recordNumber,
       callback: callback.bind(this),
       onerror: onerror
     });
   },
 };
 function RuimRecordHelperObject(aContext) {
   this.context = aContext;
 }
 RuimRecordHelperObject.prototype = {
   context: null,
   fetchRuimRecords: function() {
     this.getIMSI_M();
     this.readCST();
     this.readCDMAHome();
     this.context.RIL.getCdmaSubscription();
   },
   /**
    * Get IMSI_M from CSIM/RUIM.
    * See 3GPP2 C.S0065 Sec. 5.2.2
    */
   getIMSI_M: function() {
     function callback() {
       let Buf = this.context.Buf;
       let strLen = Buf.readInt32();
       let encodedImsi = this.context.GsmPDUHelper.readHexOctetArray(strLen / 2);
       Buf.readStringDelimiter(strLen);
       if ((encodedImsi[CSIM_IMSI_M_PROGRAMMED_BYTE] & 0x80)) { // IMSI_M programmed
         let RIL = this.context.RIL;
         RIL.iccInfoPrivate.imsi = this.decodeIMSI(encodedImsi);
         RIL.sendChromeMessage({rilMessageType: "iccimsi",
                                imsi: RIL.iccInfoPrivate.imsi});
         let ICCUtilsHelper = this.context.ICCUtilsHelper;
         let mccMnc = ICCUtilsHelper.parseMccMncFromImsi(RIL.iccInfoPrivate.imsi);
         if (mccMnc) {
           RIL.iccInfo.mcc = mccMnc.mcc;
           RIL.iccInfo.mnc = mccMnc.mnc;
           ICCUtilsHelper.handleICCInfoChange();
         }
       }
     }
     this.context.ICCIOHelper.loadTransparentEF({
       fileId: ICC_EF_CSIM_IMSI_M,
       callback: callback.bind(this)
     });
   },
   /**
    * Decode IMSI from IMSI_M
    * See 3GPP2 C.S0005 Sec. 2.3.1
    * +---+---------+------------+---+--------+---------+---+---------+--------+
    * |RFU|   MCC   | programmed |RFU|  MNC   |  MIN1   |RFU|   MIN2  |  CLASS |
    * +---+---------+------------+---+--------+---------+---+---------+--------+
    * | 6 | 10 bits |   8 bits   | 1 | 7 bits | 24 bits | 6 | 10 bits | 8 bits |
    * +---+---------+------------+---+--------+---------+---+---------+--------+
    */
   decodeIMSI: function(encodedImsi) {
     // MCC: 10 bits, 3 digits
     let encodedMCC = ((encodedImsi[CSIM_IMSI_M_MCC_BYTE + 1] & 0x03) << 8) +
                       (encodedImsi[CSIM_IMSI_M_MCC_BYTE] & 0xff);
     let mcc = this.decodeIMSIValue(encodedMCC, 3);
     // MNC: 7 bits, 2 digits
     let encodedMNC =  encodedImsi[CSIM_IMSI_M_MNC_BYTE] & 0x7f;
     let mnc = this.decodeIMSIValue(encodedMNC, 2);
     // MIN2: 10 bits, 3 digits
     let encodedMIN2 = ((encodedImsi[CSIM_IMSI_M_MIN2_BYTE + 1] & 0x03) << 8) +
                        (encodedImsi[CSIM_IMSI_M_MIN2_BYTE] & 0xff);
     let min2 = this.decodeIMSIValue(encodedMIN2, 3);
     // MIN1: 10+4+10 bits, 3+1+3 digits
     let encodedMIN1First3 = ((encodedImsi[CSIM_IMSI_M_MIN1_BYTE + 2] & 0xff) << 2) +
                              ((encodedImsi[CSIM_IMSI_M_MIN1_BYTE + 1] & 0xc0) >> 6);
     let min1First3 = this.decodeIMSIValue(encodedMIN1First3, 3);
     let encodedFourthDigit = (encodedImsi[CSIM_IMSI_M_MIN1_BYTE + 1] & 0x3c) >> 2;
     if (encodedFourthDigit > 9) {
       encodedFourthDigit = 0;
     }
     let fourthDigit = encodedFourthDigit.toString();
     let encodedMIN1Last3 = ((encodedImsi[CSIM_IMSI_M_MIN1_BYTE + 1] & 0x03) << 8) +
                             (encodedImsi[CSIM_IMSI_M_MIN1_BYTE] & 0xff);
     let min1Last3 = this.decodeIMSIValue(encodedMIN1Last3, 3);
     return mcc + mnc + min2 + min1First3 + fourthDigit + min1Last3;
   },
   /**
    * Decode IMSI Helper function
    * See 3GPP2 C.S0005 section 2.3.1.1
    */
   decodeIMSIValue: function(encoded, length) {
     let offset = length === 3 ? 111 : 11;
     let value = encoded + offset;
     for (let base = 10, temp = value, i = 0; i < length; i++) {
       if (temp % 10 === 0) {
         value -= base;
       }
       temp = Math.floor(value / base);
       base = base * 10;
     }
     let s = value.toString();
     while (s.length < length) {
       s = "0" + s;
     }
     return s;
   },
   /**
    * Read CDMAHOME for CSIM.
    * See 3GPP2 C.S0023 Sec. 3.4.8.
    */
   readCDMAHome: function() {
     let ICCIOHelper = this.context.ICCIOHelper;
     function callback(options) {
       let Buf = this.context.Buf;
       let GsmPDUHelper = this.context.GsmPDUHelper;
       let strLen = Buf.readInt32();
       let tempOctet = GsmPDUHelper.readHexOctet();
       cdmaHomeSystemId.push(((GsmPDUHelper.readHexOctet() & 0x7f) << 8) | tempOctet);
       tempOctet = GsmPDUHelper.readHexOctet();
       cdmaHomeNetworkId.push(((GsmPDUHelper.readHexOctet() & 0xff) << 8) | tempOctet);
       // Consuming the last octet: band class.
       Buf.seekIncoming(Buf.PDU_HEX_OCTET_SIZE);
       Buf.readStringDelimiter(strLen);
       if (options.p1 < options.totalRecords) {
         ICCIOHelper.loadNextRecord(options);
       } else {
         if (DEBUG) {
           this.context.debug("CDMAHome system id: " +
                              JSON.stringify(cdmaHomeSystemId));
           this.context.debug("CDMAHome network id: " +
                              JSON.stringify(cdmaHomeNetworkId));
         }
         this.context.RIL.cdmaHome = {
           systemId: cdmaHomeSystemId,
           networkId: cdmaHomeNetworkId
         };
       }
     }
     let cdmaHomeSystemId = [], cdmaHomeNetworkId = [];
     ICCIOHelper.loadLinearFixedEF({fileId: ICC_EF_CSIM_CDMAHOME,
                                    callback: callback.bind(this)});
   },
   /**
    * Read CDMA Service Table.
    * See 3GPP2 C.S0023 Sec. 3.4.18
    */
   readCST: function() {
     function callback() {
       let Buf = this.context.Buf;
       let RIL = this.context.RIL;
       let strLen = Buf.readInt32();
       // Each octet is encoded into two chars.
       RIL.iccInfoPrivate.cst =
         this.context.GsmPDUHelper.readHexOctetArray(strLen / 2);
       Buf.readStringDelimiter(strLen);
       if (DEBUG) {
         let str = "";
         for (let i = 0; i < RIL.iccInfoPrivate.cst.length; i++) {
           str += RIL.iccInfoPrivate.cst[i] + ", ";
         }
         this.context.debug("CST: " + str);
       }
       if (this.context.ICCUtilsHelper.isICCServiceAvailable("SPN")) {
         if (DEBUG) this.context.debug("SPN: SPN is available");
         this.readSPN();
       }
     }
     this.context.ICCIOHelper.loadTransparentEF({
       fileId: ICC_EF_CSIM_CST,
       callback: callback.bind(this)
     });
   },
   readSPN: function() {
     function callback() {
       let Buf = this.context.Buf;
       let strLen = Buf.readInt32();
       let octetLen = strLen / 2;
       let GsmPDUHelper = this.context.GsmPDUHelper;
       let displayCondition = GsmPDUHelper.readHexOctet();
       let codingScheme = GsmPDUHelper.readHexOctet();
       // Skip one octet: language indicator.
       Buf.seekIncoming(Buf.PDU_HEX_OCTET_SIZE);
       let readLen = 3;
       // SPN String ends up with 0xff.
       let userDataBuffer = [];
       while (readLen < octetLen) {
         let octet = GsmPDUHelper.readHexOctet();
         readLen++;
         if (octet == 0xff) {
           break;
         }
         userDataBuffer.push(octet);
       }
       this.context.BitBufferHelper.startRead(userDataBuffer);
       let CdmaPDUHelper = this.context.CdmaPDUHelper;
       let msgLen;
       switch (CdmaPDUHelper.getCdmaMsgEncoding(codingScheme)) {
       case PDU_DCS_MSG_CODING_7BITS_ALPHABET:
         msgLen = Math.floor(userDataBuffer.length * 8 / 7);
         break;
       case PDU_DCS_MSG_CODING_8BITS_ALPHABET:
         msgLen = userDataBuffer.length;
         break;
       case PDU_DCS_MSG_CODING_16BITS_ALPHABET:
         msgLen = Math.floor(userDataBuffer.length / 2);
         break;
       }
       let RIL = this.context.RIL;
       RIL.iccInfo.spn = CdmaPDUHelper.decodeCdmaPDUMsg(codingScheme, null, msgLen);
       if (DEBUG) {
         this.context.debug("CDMA SPN: " + RIL.iccInfo.spn +
                            ", Display condition: " + displayCondition);
       }
       RIL.iccInfoPrivate.spnDisplayCondition = displayCondition;
       Buf.seekIncoming((octetLen - readLen) * Buf.PDU_HEX_OCTET_SIZE);
       Buf.readStringDelimiter(strLen);
     }
     this.context.ICCIOHelper.loadTransparentEF({
       fileId: ICC_EF_CSIM_SPN,
       callback: callback.bind(this)
     });
   }
 };
 /**
  * Helper functions for ICC utilities.
  */
 function ICCUtilsHelperObject(aContext) {
   this.context = aContext;
 }
 ICCUtilsHelperObject.prototype = {
   context: null,
   /**
    * Get network names by using EF_OPL and EF_PNN
    *
    * @See 3GPP TS 31.102 sec. 4.2.58 and sec. 4.2.59 for USIM,
    *      3GPP TS 51.011 sec. 10.3.41 and sec. 10.3.42 for SIM.
    *
    * @param mcc   The mobile country code of the network.
    * @param mnc   The mobile network code of the network.
    * @param lac   The location area code of the network.
    */
   getNetworkNameFromICC: function(mcc, mnc, lac) {
     let RIL = this.context.RIL;
     let iccInfoPriv = RIL.iccInfoPrivate;
     let iccInfo = RIL.iccInfo;
     let pnnEntry;
     if (!mcc || !mnc || !lac) {
       return null;
     }
     // We won't get network name if there is no PNN file.
     if (!iccInfoPriv.PNN) {
       return null;
     }
     if (!iccInfoPriv.OPL) {
       // When OPL is not present:
       // According to 3GPP TS 31.102 Sec. 4.2.58 and 3GPP TS 51.011 Sec. 10.3.41,
       // If EF_OPL is not present, the first record in this EF is used for the
       // default network name when registered to the HPLMN.
       // If we haven't get pnnEntry assigned, we should try to assign default
       // value to it.
       if (mcc == iccInfo.mcc && mnc == iccInfo.mnc) {
         pnnEntry = iccInfoPriv.PNN[0];
       }
     } else {
       // According to 3GPP TS 31.102 Sec. 4.2.59 and 3GPP TS 51.011 Sec. 10.3.42,
       // the ME shall use this EF_OPL in association with the EF_PNN in place
       // of any network name stored within the ME's internal list and any network
       // name received when registered to the PLMN.
       let length = iccInfoPriv.OPL ? iccInfoPriv.OPL.length : 0;
       for (let i = 0; i < length; i++) {
         let opl = iccInfoPriv.OPL[i];
         // Try to match the MCC/MNC.
         if (mcc != opl.mcc || mnc != opl.mnc) {
           continue;
         }
         // Try to match the location area code. If current local area code is
         // covered by lac range that specified in the OPL entry, use the PNN
         // that specified in the OPL entry.
         if ((opl.lacTacStart === 0x0 && opl.lacTacEnd == 0xFFFE) ||
             (opl.lacTacStart <= lac && opl.lacTacEnd >= lac)) {
           if (opl.pnnRecordId === 0) {
             // See 3GPP TS 31.102 Sec. 4.2.59 and 3GPP TS 51.011 Sec. 10.3.42,
             // A value of '00' indicates that the name is to be taken from other
             // sources.
             return null;
           }
           pnnEntry = iccInfoPriv.PNN[opl.pnnRecordId - 1];
           break;
         }
       }
     }
     if (!pnnEntry) {
       return null;
     }
     // Return a new object to avoid global variable, PNN, be modified by accident.
     return { fullName: pnnEntry.fullName || "",
              shortName: pnnEntry.shortName || "" };
   },
   /**
    * This will compute the spnDisplay field of the network.
    * See TS 22.101 Annex A and TS 51.011 10.3.11 for details.
    *
    * @return True if some of iccInfo is changed in by this function.
    */
   updateDisplayCondition: function() {
     let RIL = this.context.RIL;
     // If EFspn isn't existed in SIM or it haven't been read yet, we should
     // just set isDisplayNetworkNameRequired = true and
     // isDisplaySpnRequired = false
     let iccInfo = RIL.iccInfo;
     let iccInfoPriv = RIL.iccInfoPrivate;
     let displayCondition = iccInfoPriv.spnDisplayCondition;
     let origIsDisplayNetworkNameRequired = iccInfo.isDisplayNetworkNameRequired;
     let origIsDisplaySPNRequired = iccInfo.isDisplaySpnRequired;
     if (displayCondition === undefined) {
       iccInfo.isDisplayNetworkNameRequired = true;
       iccInfo.isDisplaySpnRequired = false;
     } else if (RIL._isCdma) {
       // CDMA family display rule.
       let cdmaHome = RIL.cdmaHome;
       let cell = RIL.voiceRegistrationState.cell;
       let sid = cell && cell.cdmaSystemId;
       let nid = cell && cell.cdmaNetworkId;
       iccInfo.isDisplayNetworkNameRequired = false;
       // If display condition is 0x0, we don't even need to check network id
       // or system id.
       if (displayCondition === 0x0) {
         iccInfo.isDisplaySpnRequired = false;
       } else {
         // CDMA SPN Display condition dosen't specify whenever network name is
         // reqired.
         if (!cdmaHome ||
             !cdmaHome.systemId ||
             cdmaHome.systemId.length === 0 ||
             cdmaHome.systemId.length != cdmaHome.networkId.length ||
             !sid || !nid) {
           // CDMA Home haven't been ready, or we haven't got the system id and
           // network id of the network we register to, assuming we are in home
           // network.
           iccInfo.isDisplaySpnRequired = true;
         } else {
           // Determine if we are registered in the home service area.
           // System ID and Network ID are described in 3GPP2 C.S0005 Sec. 2.6.5.2.
           let inHomeArea = false;
           for (let i = 0; i < cdmaHome.systemId.length; i++) {
             let homeSid = cdmaHome.systemId[i],
                 homeNid = cdmaHome.networkId[i];
             if (homeSid === 0 || homeNid === 0 // Reserved system id/network id
                || homeSid != sid) {
               continue;
             }
             // According to 3GPP2 C.S0005 Sec. 2.6.5.2, NID number 65535 means
             // all networks in the system should be considered as home.
             if (homeNid == 65535 || homeNid == nid) {
               inHomeArea = true;
               break;
             }
           }
           iccInfo.isDisplaySpnRequired = inHomeArea;
         }
       }
     } else {
       // GSM family display rule.
       let operatorMnc = RIL.operator.mnc;
       let operatorMcc = RIL.operator.mcc;
       // First detect if we are on HPLMN or one of the PLMN
       // specified by the SIM card.
       let isOnMatchingPlmn = false;
       // If the current network is the one defined as mcc/mnc
       // in SIM card, it's okay.
       if (iccInfo.mcc == operatorMcc && iccInfo.mnc == operatorMnc) {
         isOnMatchingPlmn = true;
       }
       // Test to see if operator's mcc/mnc match mcc/mnc of PLMN.
       if (!isOnMatchingPlmn && iccInfoPriv.SPDI) {
         let iccSpdi = iccInfoPriv.SPDI; // PLMN list
         for (let plmn in iccSpdi) {
           let plmnMcc = iccSpdi[plmn].mcc;
           let plmnMnc = iccSpdi[plmn].mnc;
           isOnMatchingPlmn = (plmnMcc == operatorMcc) && (plmnMnc == operatorMnc);
           if (isOnMatchingPlmn) {
             break;
           }
         }
       }
       if (isOnMatchingPlmn) {
         // The first bit of display condition tells us if we should display
         // registered PLMN.
         if (DEBUG) {
           this.context.debug("PLMN is HPLMN or PLMN " + "is in PLMN list");
         }
         // TS 31.102 Sec. 4.2.66 and TS 51.011 Sec. 10.3.50
         // EF_SPDI contains a list of PLMNs in which the Service Provider Name
         // shall be displayed.
         iccInfo.isDisplaySpnRequired = true;
         iccInfo.isDisplayNetworkNameRequired = (displayCondition & 0x01) !== 0;
       } else {
         // The second bit of display condition tells us if we should display
         // registered PLMN.
         if (DEBUG) {
           this.context.debug("PLMN isn't HPLMN and PLMN isn't in PLMN list");
         }
         // We didn't found the requirement of displaying network name if
         // current PLMN isn't HPLMN nor one of PLMN in SPDI. So we keep
         // isDisplayNetworkNameRequired false.
         iccInfo.isDisplayNetworkNameRequired = false;
         iccInfo.isDisplaySpnRequired = (displayCondition & 0x02) === 0;
       }
     }
     if (DEBUG) {
       this.context.debug("isDisplayNetworkNameRequired = " +
                          iccInfo.isDisplayNetworkNameRequired);
       this.context.debug("isDisplaySpnRequired = " + iccInfo.isDisplaySpnRequired);
     }
     return ((origIsDisplayNetworkNameRequired !== iccInfo.isDisplayNetworkNameRequired) ||
             (origIsDisplaySPNRequired !== iccInfo.isDisplaySpnRequired));
   },
   decodeSimTlvs: function(tlvsLen) {
     let GsmPDUHelper = this.context.GsmPDUHelper;
     let index = 0;
     let tlvs = [];
     while (index < tlvsLen) {
       let simTlv = {
         tag : GsmPDUHelper.readHexOctet(),
         length : GsmPDUHelper.readHexOctet(),
       };
       simTlv.value = GsmPDUHelper.readHexOctetArray(simTlv.length);
       tlvs.push(simTlv);
       index += simTlv.length + 2; // The length of 'tag' and 'length' field.
     }
     return tlvs;
   },
   /**
    * Parse those TLVs and convert it to an object.
    */
   parsePbrTlvs: function(pbrTlvs) {
     let pbr = {};
     for (let i = 0; i < pbrTlvs.length; i++) {
       let pbrTlv = pbrTlvs[i];
       let anrIndex = 0;
       for (let j = 0; j < pbrTlv.value.length; j++) {
         let tlv = pbrTlv.value[j];
         let tagName = USIM_TAG_NAME[tlv.tag];
         // ANR could have multiple files. We save it as anr0, anr1,...etc.
         if (tlv.tag == ICC_USIM_EFANR_TAG) {
           tagName += anrIndex;
           anrIndex++;
         }
         pbr[tagName] = tlv;
         pbr[tagName].fileType = pbrTlv.tag;
         pbr[tagName].fileId = (tlv.value[0] << 8) | tlv.value[1];
         pbr[tagName].sfi = tlv.value[2];
         // For Type 2, the order of files is in the same order in IAP.
         if (pbrTlv.tag == ICC_USIM_TYPE2_TAG) {
           pbr[tagName].indexInIAP = j;
         }
       }
     }
     return pbr;
   },
   /**
    * Update the ICC information to RadioInterfaceLayer.
    */
   handleICCInfoChange: function() {
     let RIL = this.context.RIL;
     RIL.iccInfo.rilMessageType = "iccinfochange";
     RIL.sendChromeMessage(RIL.iccInfo);
   },
   /**
    * Get whether specificed (U)SIM service is available.
    *
    * @param geckoService
    *        Service name like "ADN", "BDN", etc.
    *
    * @return true if the service is enabled, false otherwise.
    */
   isICCServiceAvailable: function(geckoService) {
     let RIL = this.context.RIL;
     let serviceTable = RIL._isCdma ? RIL.iccInfoPrivate.cst:
                                      RIL.iccInfoPrivate.sst;
     let index, bitmask;
     if (RIL.appType == CARD_APPTYPE_SIM || RIL.appType == CARD_APPTYPE_RUIM) {
       /**
        * Service id is valid in 1..N, and 2 bits are used to code each service.
        *
        * +----+--  --+----+----+
        * | b8 | ...  | b2 | b1 |
        * +----+--  --+----+----+
        *
        * b1 = 0, service not allocated.
        *      1, service allocated.
        * b2 = 0, service not activatd.
        *      1, service allocated.
        *
        * @see 3GPP TS 51.011 10.3.7.
        */
       let simService;
       if (RIL.appType == CARD_APPTYPE_SIM) {
         simService = GECKO_ICC_SERVICES.sim[geckoService];
       } else {
         simService = GECKO_ICC_SERVICES.ruim[geckoService];
       }
       if (!simService) {
         return false;
       }
       simService -= 1;
       index = Math.floor(simService / 4);
       bitmask = 2 << ((simService % 4) << 1);
     } else if (RIL.appType == CARD_APPTYPE_USIM) {
       /**
        * Service id is valid in 1..N, and 1 bit is used to code each service.
        *
        * +----+--  --+----+----+
        * | b8 | ...  | b2 | b1 |
        * +----+--  --+----+----+
        *
        * b1 = 0, service not avaiable.
        *      1, service available.
        * b2 = 0, service not avaiable.
        *      1, service available.
        *
        * @see 3GPP TS 31.102 4.2.8.
        */
       let usimService = GECKO_ICC_SERVICES.usim[geckoService];
       if (!usimService) {
         return false;
       }
       usimService -= 1;
       index = Math.floor(usimService / 8);
       bitmask = 1 << ((usimService % 8) << 0);
     }
     return (serviceTable !== null) &&
            (index < serviceTable.length) &&
            ((serviceTable[index] & bitmask) !== 0);
   },
   /**
    * Check if the string is of GSM default 7-bit coded alphabets with bit 8
    * set to 0.
    *
    * @param str  String to be checked.
    */
   isGsm8BitAlphabet: function(str) {
     if (!str) {
       return false;
     }
     const langTable = PDU_NL_LOCKING_SHIFT_TABLES[PDU_NL_IDENTIFIER_DEFAULT];
     const langShiftTable = PDU_NL_SINGLE_SHIFT_TABLES[PDU_NL_IDENTIFIER_DEFAULT];
     for (let i = 0; i < str.length; i++) {
       let c = str.charAt(i);
       let octet = langTable.indexOf(c);
       if (octet == -1) {
         octet = langShiftTable.indexOf(c);
         if (octet == -1) {
           return false;
         }
       }
     }
     return true;
   },
   /**
    * Parse MCC/MNC from IMSI. If there is no available value for the length of
    * mnc, it will use the data in MCC table to parse.
    *
    * @param imsi
    *        The imsi of icc.
    * @param mncLength [optional]
    *        The length of mnc.
    *
    * @return An object contains the parsing result of mcc and mnc.
    *         Or null if any error occurred.
    */
   parseMccMncFromImsi: function(imsi, mncLength) {
     if (!imsi) {
       return null;
     }
     // MCC is the first 3 digits of IMSI.
     let mcc = imsi.substr(0,3);
     if (!mncLength) {
       // Check the MCC table to decide the length of MNC.
       let index = MCC_TABLE_FOR_MNC_LENGTH_IS_3.indexOf(mcc);
       mncLength = (index !== -1) ? 3 : 2;
     }
     let mnc = imsi.substr(3, mncLength);
     if (DEBUG) {
       this.context.debug("IMSI: " + imsi + " MCC: " + mcc + " MNC: " + mnc);
     }
     return { mcc: mcc, mnc: mnc};
   },
 };
 /**
  * Helper for ICC Contacts.
  */
 function ICCContactHelperObject(aContext) {
   this.context = aContext;
 }
 ICCContactHelperObject.prototype = {
   context: null,
   /**
    * Helper function to check DF_PHONEBOOK.
    */
   hasDfPhoneBook: function(appType) {
     switch (appType) {
       case CARD_APPTYPE_SIM:
         return false;
       case CARD_APPTYPE_USIM:
         return true;
       case CARD_APPTYPE_RUIM:
         let ICCUtilsHelper = this.context.ICCUtilsHelper;
         return ICCUtilsHelper.isICCServiceAvailable("ENHANCED_PHONEBOOK");
       default:
         return false;
     }
   },
   /**
    * Helper function to read ICC contacts.
    *
    * @param appType       One of CARD_APPTYPE_*.
    * @param contactType   "adn" or "fdn".
    * @param onsuccess     Callback to be called when success.
    * @param onerror       Callback to be called when error.
    */
   readICCContacts: function(appType, contactType, onsuccess, onerror) {
     let ICCRecordHelper = this.context.ICCRecordHelper;
     switch (contactType) {
       case "adn":
         if (!this.hasDfPhoneBook(appType)) {
           ICCRecordHelper.readADNLike(ICC_EF_ADN, onsuccess, onerror);
         } else {
           this.readUSimContacts(onsuccess, onerror);
         }
         break;
       case "fdn":
         ICCRecordHelper.readADNLike(ICC_EF_FDN, onsuccess, onerror);
         break;
       default:
         if (DEBUG) {
           this.context.debug("Unsupported contactType :" + contactType);
         }
         onerror(CONTACT_ERR_CONTACT_TYPE_NOT_SUPPORTED);
         break;
     }
   },
   /**
    * Helper function to find free contact record.
    *
    * @param appType       One of CARD_APPTYPE_*.
    * @param contactType   "adn" or "fdn".
    * @param onsuccess     Callback to be called when success.
    * @param onerror       Callback to be called when error.
    */
   findFreeICCContact: function(appType, contactType, onsuccess, onerror) {
     let ICCRecordHelper = this.context.ICCRecordHelper;
     switch (contactType) {
       case "adn":
         if (!this.hasDfPhoneBook(appType)) {
           ICCRecordHelper.findFreeRecordId(ICC_EF_ADN, onsuccess.bind(null, 0), onerror);
         } else {
           let gotPbrCb = function gotPbrCb(pbrs) {
             this.findUSimFreeADNRecordId(pbrs, onsuccess, onerror);
           }.bind(this);
           ICCRecordHelper.readPBR(gotPbrCb, onerror);
         }
         break;
       case "fdn":
         ICCRecordHelper.findFreeRecordId(ICC_EF_FDN, onsuccess.bind(null, 0), onerror);
         break;
       default:
         if (DEBUG) {
           this.context.debug("Unsupported contactType :" + contactType);
         }
         onerror(CONTACT_ERR_CONTACT_TYPE_NOT_SUPPORTED);
         break;
     }
   },
    /**
     * Find free ADN record id in USIM.
     *
     * @param pbrs          All Phonebook Reference Files read.
     * @param onsuccess     Callback to be called when success.
     * @param onerror       Callback to be called when error.
     */
   findUSimFreeADNRecordId: function(pbrs, onsuccess, onerror) {
     let ICCRecordHelper = this.context.ICCRecordHelper;
     (function findFreeRecordId(pbrIndex) {
       if (pbrIndex >= pbrs.length) {
         if (DEBUG) {
           this.context.debug(CONTACT_ERR_NO_FREE_RECORD_FOUND);
         }
         onerror(CONTACT_ERR_NO_FREE_RECORD_FOUND);
         return;
       }
       let pbr = pbrs[pbrIndex];
       ICCRecordHelper.findFreeRecordId(
         pbr.adn.fileId,
         onsuccess.bind(this, pbrIndex),
         findFreeRecordId.bind(null, pbrIndex + 1));
     })(0);
   },
   /**
    * Helper function to add a new ICC contact.
    *
    * @param appType       One of CARD_APPTYPE_*.
    * @param contactType   "adn" or "fdn".
    * @param contact       The contact will be added.
    * @param pin2          PIN2 is required for FDN.
    * @param onsuccess     Callback to be called when success.
    * @param onerror       Callback to be called when error.
    */
   addICCContact: function(appType, contactType, contact, pin2, onsuccess, onerror) {
     let foundFreeCb = (function foundFreeCb(pbrIndex, recordId) {
       contact.pbrIndex = pbrIndex;
       contact.recordId = recordId;
       this.updateICCContact(appType, contactType, contact, pin2, onsuccess, onerror);
     }).bind(this);
     // Find free record first.
     this.findFreeICCContact(appType, contactType, foundFreeCb, onerror);
   },
   /**
    * Helper function to update ICC contact.
    *
    * @param appType       One of CARD_APPTYPE_*.
    * @param contactType   "adn" or "fdn".
    * @param contact       The contact will be updated.
    * @param pin2          PIN2 is required for FDN.
    * @param onsuccess     Callback to be called when success.
    * @param onerror       Callback to be called when error.
    */
   updateICCContact: function(appType, contactType, contact, pin2, onsuccess, onerror) {
     let ICCRecordHelper = this.context.ICCRecordHelper;
     switch (contactType) {
       case "adn":
         if (!this.hasDfPhoneBook(appType)) {
           ICCRecordHelper.updateADNLike(ICC_EF_ADN, contact, null, onsuccess, onerror);
         } else {
           this.updateUSimContact(contact, onsuccess, onerror);
         }
         break;
       case "fdn":
         if (!pin2) {
           onerror(GECKO_ERROR_SIM_PIN2);
           return;
         }
         ICCRecordHelper.updateADNLike(ICC_EF_FDN, contact, pin2, onsuccess, onerror);
         break;
       default:
         if (DEBUG) {
           this.context.debug("Unsupported contactType :" + contactType);
         }
         onerror(CONTACT_ERR_CONTACT_TYPE_NOT_SUPPORTED);
         break;
     }
   },
   /**
    * Read contacts from USIM.
    *
    * @param onsuccess     Callback to be called when success.
    * @param onerror       Callback to be called when error.
    */
   readUSimContacts: function(onsuccess, onerror) {
     let gotPbrCb = function gotPbrCb(pbrs) {
       this.readAllPhonebookSets(pbrs, onsuccess, onerror);
     }.bind(this);
     this.context.ICCRecordHelper.readPBR(gotPbrCb, onerror);
   },
   /**
    * Read all Phonebook sets.
    *
    * @param pbrs          All Phonebook Reference Files read.
    * @param onsuccess     Callback to be called when success.
    * @param onerror       Callback to be called when error.
    */
   readAllPhonebookSets: function(pbrs, onsuccess, onerror) {
     let allContacts = [], pbrIndex = 0;
     let readPhonebook = function readPhonebook(contacts) {
       if (contacts) {
         allContacts = allContacts.concat(contacts);
       }
       let cLen = contacts ? contacts.length : 0;
       for (let i = 0; i < cLen; i++) {
         contacts[i].pbrIndex = pbrIndex;
       }
       pbrIndex++;
       if (pbrIndex >= pbrs.length) {
         if (onsuccess) {
           onsuccess(allContacts);
         }
         return;
       }
       this.readPhonebookSet(pbrs[pbrIndex], readPhonebook, onerror);
     }.bind(this);
     this.readPhonebookSet(pbrs[pbrIndex], readPhonebook, onerror);
   },
   /**
    * Read from Phonebook Reference File.
    *
    * @param pbr           Phonebook Reference File to be read.
    * @param onsuccess     Callback to be called when success.
    * @param onerror       Callback to be called when error.
    */
   readPhonebookSet: function(pbr, onsuccess, onerror) {
     let gotAdnCb = function gotAdnCb(contacts) {
       this.readSupportedPBRFields(pbr, contacts, onsuccess, onerror);
     }.bind(this);
     this.context.ICCRecordHelper.readADNLike(pbr.adn.fileId, gotAdnCb, onerror);
   },
   /**
    * Read supported Phonebook fields.
    *
    * @param pbr         Phone Book Reference file.
    * @param contacts    Contacts stored on ICC.
    * @param onsuccess   Callback to be called when success.
    * @param onerror     Callback to be called when error.
    */
   readSupportedPBRFields: function(pbr, contacts, onsuccess, onerror) {
     let fieldIndex = 0;
     (function readField() {
       let field = USIM_PBR_FIELDS[fieldIndex];
       fieldIndex += 1;
       if (!field) {
         if (onsuccess) {
           onsuccess(contacts);
         }
         return;
       }
       this.readPhonebookField(pbr, contacts, field, readField.bind(this), onerror);
     }).call(this);
   },
   /**
    * Read Phonebook field.
    *
    * @param pbr           The phonebook reference file.
    * @param contacts      Contacts stored on ICC.
    * @param field         Phonebook field to be retrieved.
    * @param onsuccess     Callback to be called when success.
    * @param onerror       Callback to be called when error.
    */
   readPhonebookField: function(pbr, contacts, field, onsuccess, onerror) {
     if (!pbr[field]) {
       if (onsuccess) {
         onsuccess(contacts);
       }
       return;
     }
     (function doReadContactField(n) {
       if (n >= contacts.length) {
         // All contact's fields are read.
         if (onsuccess) {
           onsuccess(contacts);
         }
         return;
       }
       // get n-th contact's field.
       this.readContactField(pbr, contacts[n], field,
                             doReadContactField.bind(this, n + 1), onerror);
     }).call(this, 0);
   },
   /**
    * Read contact's field from USIM.
    *
    * @param pbr           The phonebook reference file.
    * @param contact       The contact needs to get field.
    * @param field         Phonebook field to be retrieved.
    * @param onsuccess     Callback to be called when success.
    * @param onerror       Callback to be called when error.
    */
   readContactField: function(pbr, contact, field, onsuccess, onerror) {
     let gotRecordIdCb = function gotRecordIdCb(recordId) {
       if (recordId == 0xff) {
         if (onsuccess) {
           onsuccess();
         }
         return;
       }
       let fileId = pbr[field].fileId;
       let fileType = pbr[field].fileType;
       let gotFieldCb = function gotFieldCb(value) {
         if (value) {
           // Move anr0 anr1,.. into anr[].
           if (field.startsWith(USIM_PBR_ANR)) {
             if (!contact[USIM_PBR_ANR]) {
               contact[USIM_PBR_ANR] = [];
             }
             contact[USIM_PBR_ANR].push(value);
           } else {
             contact[field] = value;
           }
         }
         if (onsuccess) {
           onsuccess();
         }
       }.bind(this);
       let ICCRecordHelper = this.context.ICCRecordHelper;
       // Detect EF to be read, for anr, it could have anr0, anr1,...
       let ef = field.startsWith(USIM_PBR_ANR) ? USIM_PBR_ANR : field;
       switch (ef) {
         case USIM_PBR_EMAIL:
           ICCRecordHelper.readEmail(fileId, fileType, recordId, gotFieldCb, onerror);
           break;
         case USIM_PBR_ANR:
           ICCRecordHelper.readANR(fileId, fileType, recordId, gotFieldCb, onerror);
           break;
         default:
           if (DEBUG) {
             this.context.debug("Unsupported field :" + field);
           }
           onerror(CONTACT_ERR_FIELD_NOT_SUPPORTED);
           break;
       }
     }.bind(this);
     this.getContactFieldRecordId(pbr, contact, field, gotRecordIdCb, onerror);
   },
   /**
    * Get the recordId.
    *
    * If the fileType of field is ICC_USIM_TYPE1_TAG, use corresponding ADN recordId.
    * otherwise get the recordId from IAP.
    *
    * @see TS 131.102, clause 4.4.2.2
    *
    * @param pbr          The phonebook reference file.
    * @param contact      The contact will be updated.
    * @param onsuccess    Callback to be called when success.
    * @param onerror      Callback to be called when error.
    */
   getContactFieldRecordId: function(pbr, contact, field, onsuccess, onerror) {
     if (pbr[field].fileType == ICC_USIM_TYPE1_TAG) {
       // If the file type is ICC_USIM_TYPE1_TAG, use corresponding ADN recordId.
       if (onsuccess) {
         onsuccess(contact.recordId);
       }
     } else if (pbr[field].fileType == ICC_USIM_TYPE2_TAG) {
       // If the file type is ICC_USIM_TYPE2_TAG, the recordId shall be got from IAP.
       let gotIapCb = function gotIapCb(iap) {
         let indexInIAP = pbr[field].indexInIAP;
         let recordId = iap[indexInIAP];
         if (onsuccess) {
           onsuccess(recordId);
         }
       }.bind(this);
       this.context.ICCRecordHelper.readIAP(pbr.iap.fileId, contact.recordId,
                                            gotIapCb, onerror);
     } else {
       if (DEBUG) {
         this.context.debug("USIM PBR files in Type 3 format are not supported.");
       }
       onerror(CONTACT_ERR_REQUEST_NOT_SUPPORTED);
     }
   },
   /**
    * Update USIM contact.
    *
    * @param contact       The contact will be updated.
    * @param onsuccess     Callback to be called when success.
    * @param onerror       Callback to be called when error.
    */
   updateUSimContact: function(contact, onsuccess, onerror) {
     let gotPbrCb = function gotPbrCb(pbrs) {
       let pbr = pbrs[contact.pbrIndex];
       if (!pbr) {
         if (DEBUG) {
           this.context.debug(CONTACT_ERR_CANNOT_ACCESS_PHONEBOOK);
         }
         onerror(CONTACT_ERR_CANNOT_ACCESS_PHONEBOOK);
         return;
       }
       this.updatePhonebookSet(pbr, contact, onsuccess, onerror);
     }.bind(this);
     this.context.ICCRecordHelper.readPBR(gotPbrCb, onerror);
   },
   /**
    * Update fields in Phonebook Reference File.
    *
    * @param pbr           Phonebook Reference File to be read.
    * @param onsuccess     Callback to be called when success.
    * @param onerror       Callback to be called when error.
    */
   updatePhonebookSet: function(pbr, contact, onsuccess, onerror) {
     let updateAdnCb = function() {
       this.updateSupportedPBRFields(pbr, contact, onsuccess, onerror);
     }.bind(this);
     this.context.ICCRecordHelper.updateADNLike(pbr.adn.fileId, contact, null,
                                                updateAdnCb, onerror);
   },
   /**
    * Update supported Phonebook fields.
    *
    * @param pbr         Phone Book Reference file.
    * @param contact     Contact to be updated.
    * @param onsuccess   Callback to be called when success.
    * @param onerror     Callback to be called when error.
    */
   updateSupportedPBRFields: function(pbr, contact, onsuccess, onerror) {
     let fieldIndex = 0;
     (function updateField() {
       let field = USIM_PBR_FIELDS[fieldIndex];
       fieldIndex += 1;
       if (!field) {
         if (onsuccess) {
           onsuccess();
         }
         return;
       }
       // Check if PBR has this field.
       if (!pbr[field]) {
         updateField.call(this);
         return;
       }
       this.updateContactField(pbr, contact, field, updateField.bind(this), onerror);
     }).call(this);
   },
   /**
    * Update contact's field from USIM.
    *
    * @param pbr           The phonebook reference file.
    * @param contact       The contact needs to be updated.
    * @param field         Phonebook field to be updated.
    * @param onsuccess     Callback to be called when success.
    * @param onerror       Callback to be called when error.
    */
   updateContactField: function(pbr, contact, field, onsuccess, onerror) {
     if (pbr[field].fileType === ICC_USIM_TYPE1_TAG) {
       this.updateContactFieldType1(pbr, contact, field, onsuccess, onerror);
     } else if (pbr[field].fileType === ICC_USIM_TYPE2_TAG) {
       this.updateContactFieldType2(pbr, contact, field, onsuccess, onerror);
     } else {
       if (DEBUG) {
         this.context.debug("USIM PBR files in Type 3 format are not supported.");
       }
       onerror(CONTACT_ERR_REQUEST_NOT_SUPPORTED);
     }
   },
   /**
    * Update Type 1 USIM contact fields.
    *
    * @param pbr           The phonebook reference file.
    * @param contact       The contact needs to be updated.
    * @param field         Phonebook field to be updated.
    * @param onsuccess     Callback to be called when success.
    * @param onerror       Callback to be called when error.
    */
   updateContactFieldType1: function(pbr, contact, field, onsuccess, onerror) {
     let ICCRecordHelper = this.context.ICCRecordHelper;
     if (field === USIM_PBR_EMAIL) {
       ICCRecordHelper.updateEmail(pbr, contact.recordId, contact.email, null, onsuccess, onerror);
     } else if (field === USIM_PBR_ANR0) {
       let anr = Array.isArray(contact.anr) ? contact.anr[0] : null;
       ICCRecordHelper.updateANR(pbr, contact.recordId, anr, null, onsuccess, onerror);
     } else {
      if (DEBUG) {
        this.context.debug("Unsupported field :" + field);
      }
      onerror(CONTACT_ERR_FIELD_NOT_SUPPORTED);
     }
   },
   /**
    * Update Type 2 USIM contact fields.
    *
    * @param pbr           The phonebook reference file.
    * @param contact       The contact needs to be updated.
    * @param field         Phonebook field to be updated.
    * @param onsuccess     Callback to be called when success.
    * @param onerror       Callback to be called when error.
    */
   updateContactFieldType2: function(pbr, contact, field, onsuccess, onerror) {
     let ICCRecordHelper = this.context.ICCRecordHelper;
     // Case 1 : EF_IAP[adnRecordId] doesn't have a value(0xff)
     //   Find a free recordId for EF_field
     //   Update field with that free recordId.
     //   Update IAP.
     //
     // Case 2: EF_IAP[adnRecordId] has a value
     //   update EF_field[iap[field.indexInIAP]]
     let gotIapCb = function gotIapCb(iap) {
       let recordId = iap[pbr[field].indexInIAP];
       if (recordId === 0xff) {
         // If the value in IAP[index] is 0xff, which means the contact stored on
         // the SIM doesn't have the additional attribute (email or anr).
         // So if the contact to be updated doesn't have the attribute either,
         // we don't have to update it.
         if ((field === USIM_PBR_EMAIL && contact.email) ||
             (field === USIM_PBR_ANR0 &&
              (Array.isArray(contact.anr) && contact.anr[0]))) {
           // Case 1.
           this.addContactFieldType2(pbr, contact, field, onsuccess, onerror);
         } else {
           if (onsuccess) {
             onsuccess();
           }
         }
         return;
       }
       // Case 2.
       if (field === USIM_PBR_EMAIL) {
         ICCRecordHelper.updateEmail(pbr, recordId, contact.email, contact.recordId, onsuccess, onerror);
       } else if (field === USIM_PBR_ANR0) {
         let anr = Array.isArray(contact.anr) ? contact.anr[0] : null;
         ICCRecordHelper.updateANR(pbr, recordId, anr, contact.recordId, onsuccess, onerror);
       } else {
         if (DEBUG) {
           this.context.debug("Unsupported field :" + field);
         }
         onerror(CONTACT_ERR_FIELD_NOT_SUPPORTED);
       }
     }.bind(this);
     ICCRecordHelper.readIAP(pbr.iap.fileId, contact.recordId, gotIapCb, onerror);
   },
   /**
    * Add Type 2 USIM contact fields.
    *
    * @param pbr           The phonebook reference file.
    * @param contact       The contact needs to be updated.
    * @param field         Phonebook field to be updated.
    * @param onsuccess     Callback to be called when success.
    * @param onerror       Callback to be called when error.
    */
   addContactFieldType2: function(pbr, contact, field, onsuccess, onerror) {
     let ICCRecordHelper = this.context.ICCRecordHelper;
     let successCb = function successCb(recordId) {
       let updateCb = function updateCb() {
         this.updateContactFieldIndexInIAP(pbr, contact.recordId, field, recordId, onsuccess, onerror);
       }.bind(this);
       if (field === USIM_PBR_EMAIL) {
         ICCRecordHelper.updateEmail(pbr, recordId, contact.email, contact.recordId, updateCb, onerror);
       } else if (field === USIM_PBR_ANR0) {
         ICCRecordHelper.updateANR(pbr, recordId, contact.anr[0], contact.recordId, updateCb, onerror);
       }
     }.bind(this);
     let errorCb = function errorCb(errorMsg) {
       if (DEBUG) {
         this.context.debug(errorMsg + " USIM field " + field);
       }
       onerror(errorMsg);
     }.bind(this);
     ICCRecordHelper.findFreeRecordId(pbr[field].fileId, successCb, errorCb);
   },
   /**
    * Update IAP value.
    *
    * @param pbr           The phonebook reference file.
    * @param recordNumber  The record identifier of EF_IAP.
    * @param field         Phonebook field.
    * @param value         The value of 'field' in IAP.
    * @param onsuccess     Callback to be called when success.
    * @param onerror       Callback to be called when error.
    *
    */
   updateContactFieldIndexInIAP: function(pbr, recordNumber, field, value, onsuccess, onerror) {
     let ICCRecordHelper = this.context.ICCRecordHelper;
     let gotIAPCb = function gotIAPCb(iap) {
       iap[pbr[field].indexInIAP] = value;
       ICCRecordHelper.updateIAP(pbr.iap.fileId, recordNumber, iap, onsuccess, onerror);
     }.bind(this);
     ICCRecordHelper.readIAP(pbr.iap.fileId, recordNumber, gotIAPCb, onerror);
   },
 };
 /**
  * Global stuff.
  */
 function Context(aClientId) {
   this.clientId = aClientId;
   this.Buf = new BufObject(this);
   this.Buf.init();
   this.RIL = new RilObject(this);
   this.RIL.initRILState();
 }
 Context.prototype = {
   clientId: null,
   Buf: null,
   RIL: null,
   debug: function(aMessage) {
     GLOBAL.debug("[" + this.clientId + "] " + aMessage);
   }
 };
 (function() {
   let lazySymbols = [
     "BerTlvHelper", "BitBufferHelper", "CdmaPDUHelper",
     "ComprehensionTlvHelper", "GsmPDUHelper", "ICCContactHelper",
     "ICCFileHelper", "ICCIOHelper", "ICCPDUHelper", "ICCRecordHelper",
     "ICCUtilsHelper", "RuimRecordHelper", "SimRecordHelper",
     "StkCommandParamsFactory", "StkProactiveCmdHelper",
   ];
   for (let i = 0; i < lazySymbols.length; i++) {
     let symbol = lazySymbols[i];
     Object.defineProperty(Context.prototype, symbol, {
       get: function() {
         let real = new GLOBAL[symbol + "Object"](this);
         Object.defineProperty(this, symbol, {
           value: real,
           enumerable: true
         });
         return real;
       },
       configurable: true,
       enumerable: true
     });
   }
 })();
 let ContextPool = {
   _contexts: [],
   handleRilMessage: function(aClientId, aUint8Array) {
     let context = this._contexts[aClientId];
     context.Buf.processIncoming(aUint8Array);
   },
   handleChromeMessage: function(aMessage) {
     let clientId = aMessage.rilMessageClientId;
     if (clientId != null) {
       let context = this._contexts[clientId];
       context.RIL.handleChromeMessage(aMessage);
       return;
     }
     if (DEBUG) debug("Received global chrome message " + JSON.stringify(aMessage));
     let method = this[aMessage.rilMessageType];
     if (typeof method != "function") {
       if (DEBUG) {
         debug("Don't know what to do");
       }
       return;
     }
     method.call(this, aMessage);
   },
   setInitialOptions: function(aOptions) {
     DEBUG = DEBUG_WORKER || aOptions.debug;
     RIL_EMERGENCY_NUMBERS = aOptions.rilEmergencyNumbers;
     RIL_CELLBROADCAST_DISABLED = aOptions.cellBroadcastDisabled;
     RIL_CLIR_MODE = aOptions.clirMode;
     let quirks = aOptions.quirks;
     RILQUIRKS_CALLSTATE_EXTRA_UINT32 = quirks.callstateExtraUint32;
     RILQUIRKS_V5_LEGACY = quirks.v5Legacy;
     RILQUIRKS_REQUEST_USE_DIAL_EMERGENCY_CALL = quirks.requestUseDialEmergencyCall;
     RILQUIRKS_SIM_APP_STATE_EXTRA_FIELDS = quirks.simAppStateExtraFields;
     RILQUIRKS_EXTRA_UINT32_2ND_CALL = quirks.extraUint2ndCall;
     RILQUIRKS_HAVE_QUERY_ICC_LOCK_RETRY_COUNT = quirks.haveQueryIccLockRetryCount;
     RILQUIRKS_SEND_STK_PROFILE_DOWNLOAD = quirks.sendStkProfileDownload;
     RILQUIRKS_DATA_REGISTRATION_ON_DEMAND = quirks.dataRegistrationOnDemand;
   },
   registerClient: function(aOptions) {
     let clientId = aOptions.clientId;
     this._contexts[clientId] = new Context(clientId);
   },
 };
 function onRILMessage(aClientId, aUint8Array) {
   ContextPool.handleRilMessage(aClientId, aUint8Array);
 }
 onmessage = function onmessage(event) {
   ContextPool.handleChromeMessage(event.data);
 };
 onerror = function onerror(event) {
   if (DEBUG) debug("onerror" + event.message + "\n");
 };