The Tor Browser: dom/wifi/WifiP2pManager.jsm@b8a032363ba2 (annotated)

dom/wifi/WifiP2pManager.jsm@b8a032363ba2 (annotated)

dom/wifi/WifiP2pManager.jsm

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

 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
  * You can obtain one at http://mozilla.org/MPL/2.0/. */
 "use strict";
 const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 Cu.import("resource://gre/modules/StateMachine.jsm");
 Cu.import("resource://gre/modules/Services.jsm");
 Cu.import("resource://gre/modules/systemlibs.js");
 XPCOMUtils.defineLazyServiceGetter(this, "gSysMsgr",
                                    "@mozilla.org/system-message-internal;1",
                                    "nsISystemMessagesInternal");
 XPCOMUtils.defineLazyServiceGetter(this, "gNetworkManager",
                                    "@mozilla.org/network/manager;1",
                                    "nsINetworkManager");
 const kNetworkInterfaceStateChangedTopic = "network-interface-state-changed";
 this.EXPORTED_SYMBOLS = ["WifiP2pManager"];
 const EVENT_IGNORED                      = -1;
 const EVENT_UNKNOWN                      = -2;
 // Events from supplicant for p2p.
 const EVENT_P2P_DEVICE_FOUND             = 0;
 const EVENT_P2P_DEVICE_LOST              = 1;
 const EVENT_P2P_GROUP_STARTED            = 2;
 const EVENT_P2P_GROUP_REMOVED            = 3;
 const EVENT_P2P_PROV_DISC_PBC_REQ        = 4;
 const EVENT_P2P_PROV_DISC_PBC_RESP       = 5;
 const EVENT_P2P_PROV_DISC_SHOW_PIN       = 6;
 const EVENT_P2P_PROV_DISC_ENTER_PIN      = 7;
 const EVENT_P2P_GO_NEG_REQUEST           = 8;
 const EVENT_P2P_GO_NEG_SUCCESS           = 9;
 const EVENT_P2P_GO_NEG_FAILURE           = 10;
 const EVENT_P2P_GROUP_FORMATION_SUCCESS  = 11;
 const EVENT_P2P_GROUP_FORMATION_FAILURE  = 12;
 const EVENT_P2P_FIND_STOPPED             = 13;
 const EVENT_P2P_INVITATION_RESULT        = 14;
 const EVENT_P2P_INVITATION_RECEIVED      = 15;
 const EVENT_P2P_PROV_DISC_FAILURE        = 16;
 // Events from supplicant but not p2p specific.
 const EVENT_AP_STA_DISCONNECTED          = 100;
 const EVENT_AP_STA_CONNECTED             = 101;
 // Events from DOM.
 const EVENT_P2P_SET_PAIRING_CONFIRMATION = 1000;
 const EVENT_P2P_CMD_CONNECT              = 1001;
 const EVENT_P2P_CMD_DISCONNECT           = 1002;
 const EVENT_P2P_CMD_ENABLE               = 1003;
 const EVENT_P2P_CMD_DISABLE              = 1004;
 const EVENT_P2P_CMD_ENABLE_SCAN          = 1005;
 const EVENT_P2P_CMD_DISABLE_SCAN         = 1006;
 const EVENT_P2P_CMD_BLOCK_SCAN           = 1007;
 const EVENT_P2P_CMD_UNBLOCK_SCAN         = 1008;
 // Internal events.
 const EVENT_TIMEOUT_PAIRING_CONFIRMATION = 10000;
 const EVENT_TIMEOUT_NEG_REQ              = 10001;
 const EVENT_TIMEOUT_CONNECTING           = 10002;
 const EVENT_P2P_ENABLE_SUCCESS           = 10003;
 const EVENT_P2P_ENABLE_FAILED            = 10004;
 const EVENT_P2P_DISABLE_SUCCESS          = 10005;
 // WPS method string.
 const WPS_METHOD_PBC     = "pbc";
 const WPS_METHOD_DISPLAY = "display";
 const WPS_METHOD_KEYPAD  = "keypad";
 // Role string.
 const P2P_ROLE_GO     = "GO";
 const P2P_ROLE_CLIENT = "client";
 // System message for pairing request.
 const PAIRING_REQUEST_SYS_MSG = "wifip2p-pairing-request";
 // Configuration.
 const P2P_INTERFACE_NAME = "p2p0";
 const DEFAULT_GO_INTENT = 15;
 const DEFAULT_P2P_DEVICE_NAME = "FirefoxPhone";
 const P2P_SCAN_TIMEOUT_SEC = 120;
 const DEFAULT_P2P_WPS_METHODS = "virtual_push_button physical_display keypad"; // For wpa_supplicant.
 const DEFAULT_P2P_DEVICE_TYPE = "10-0050F204-5"; // For wpa_supplicant.
 const GO_NETWORK_INTERFACE = {
   ip:         "192.168.2.1",
   maskLength: 24,
   gateway:    "192.168.2.1",
   dns1:       "0.0.0.0",
   dns2:       "0.0.0.0",
   dhcpServer: "192.168.2.1"
 };
 const GO_DHCP_SERVER_IP_RANGE = {
   startIp: "192.168.2.10",
   endIp:   "192.168.2.30"
 };
 let gDebug = false;
 // Device Capability bitmap
 const DEVICE_CAPAB_SERVICE_DISCOVERY         = 1;
 const DEVICE_CAPAB_CLIENT_DISCOVERABILITY    = 1<<1;
 const DEVICE_CAPAB_CONCURRENT_OPER           = 1<<2;
 const DEVICE_CAPAB_INFRA_MANAGED             = 1<<3;
 const DEVICE_CAPAB_DEVICE_LIMIT              = 1<<4;
 const DEVICE_CAPAB_INVITATION_PROCEDURE      = 1<<5;
 // Group Capability bitmap
 const GROUP_CAPAB_GROUP_OWNER                = 1;
 const GROUP_CAPAB_PERSISTENT_GROUP           = 1<<1;
 const GROUP_CAPAB_GROUP_LIMIT                = 1<<2;
 const GROUP_CAPAB_INTRA_BSS_DIST             = 1<<3;
 const GROUP_CAPAB_CROSS_CONN                 = 1<<4;
 const GROUP_CAPAB_PERSISTENT_RECONN          = 1<<5;
 const GROUP_CAPAB_GROUP_FORMATION            = 1<<6;
 // Constants defined in wpa_supplicants.
 const DEV_PW_REGISTRAR_SPECIFIED = 5;
 const DEV_PW_USER_SPECIFIED      = 1;
 const DEV_PW_PUSHBUTTON          = 4;
 this.WifiP2pManager = function (aP2pCommand, aNetUtil) {
   function debug(aMsg) {
     if (gDebug) {
       dump('-------------- WifiP2pManager: ' + aMsg);
     }
   }
   let manager = {};
   let _stateMachine = P2pStateMachine(aP2pCommand, aNetUtil);
   // Set debug flag to true or false.
   //
   // @param aDebug Boolean to indicate enabling or disabling the debug flag.
   manager.setDebug = function(aDebug) {
     gDebug = aDebug;
   };
   // Set observer of observing internal state machine events.
   //
   // @param aObserver Used to notify WifiWorker what's happening
   //        in the internal p2p state machine.
   manager.setObserver = function(aObserver) {
     _stateMachine.setObserver(aObserver);
   };
   // Handle wpa_supplicant events.
   //
   // @param aEventString string from wpa_supplicant.
   manager.handleEvent = function(aEventString) {
     let event = parseEventString(aEventString);
     if (EVENT_UNKNOWN === event.id || EVENT_IGNORED === event.id) {
       debug('Unknow or ignored event: ' + aEventString);
       return false;
     }
     return _stateMachine.sendEvent(event);
   };
   // Set the confirmation of pairing request.
   //
   // @param aResult Object of confirmation result which contains:
   //    .accepted: user granted.
   //    .pin: pin code which is displaying or input by user.
   //    .wpsMethod: string of "pbc" or "display" or "keypad".
   manager.setPairingConfirmation = function(aResult) {
     let event = {
       id: EVENT_P2P_SET_PAIRING_CONFIRMATION,
       info: {
         accepted: aResult.accepted,
         pin: aResult.pin
       }
     };
     _stateMachine.sendEvent(event);
   };
   // Connect to a known peer.
   //
   // @param aAddress MAC address of the peer to connect.
   // @param aWpsMethod String of "pbc" or "display" or "keypad".
   // @param aGoIntent Number from 0 to 15.
   // @param aCallback Callback |true| on attempting to connect.
   //                          |false| on failed to connect.
   manager.connect = function(aAddress, aWpsMethod, aGoIntent, aCallback) {
     let event = {
       id: EVENT_P2P_CMD_CONNECT,
       info: {
         wpsMethod: aWpsMethod,
         address: aAddress,
         goIntent: aGoIntent,
         onDoConnect: aCallback
       }
     };
     _stateMachine.sendEvent(event);
   };
   // Disconnect with a known peer.
   //
   // @param aAddress The address the user desires to disconect.
   // @param aCallback Callback |true| on "attempting" to disconnect.
   //                           |false| on failed to disconnect.
   manager.disconnect = function(aAddress, aCallback) {
     let event = {
       id: EVENT_P2P_CMD_DISCONNECT,
       info: {
         address: aAddress,
         onDoDisconnect: aCallback
       }
     };
     _stateMachine.sendEvent(event);
   };
   // Enable/disable wifi p2p.
   //
   // @param aEnabled |true| to enable, |false| to disable.
   // @param aCallbacks object for callbacks:
   //   .onEnabled
   //   .onDisabled
   //   .onSupplicantConnected
   manager.setEnabled = function(aEnabled, aCallbacks) {
     let event = {
       id: (aEnabled ? EVENT_P2P_CMD_ENABLE : EVENT_P2P_CMD_DISABLE),
       info: {
         onEnabled: aCallbacks.onEnabled,
         onDisabled: aCallbacks.onDisabled,
         onSupplicantConnected: aCallbacks.onSupplicantConnected
       }
     };
     _stateMachine.sendEvent(event);
   };
   // Enable/disable the wifi p2p scan.
   //
   // @param aEnabled |true| to enable scan, |false| to disable scan.
   // @param aCallback Callback |true| on success to enable/disable scan.
   //                           |false| on failed to enable/disable scan.
   manager.setScanEnabled = function(aEnabled, aCallback) {
     let event = {
       id: (aEnabled ? EVENT_P2P_CMD_ENABLE_SCAN : EVENT_P2P_CMD_DISABLE_SCAN),
       info: { callback: aCallback }
     };
     _stateMachine.sendEvent(event);
   };
   // Block wifi p2p scan.
   manager.blockScan = function() {
     _stateMachine.sendEvent({ id: EVENT_P2P_CMD_BLOCK_SCAN });
   };
   // Un-block and do the pending scan if any.
   manager.unblockScan = function() {
     _stateMachine.sendEvent({ id: EVENT_P2P_CMD_UNBLOCK_SCAN });
   };
   // Set the p2p device name.
   manager.setDeviceName = function(newDeivceName, callback) {
     aP2pCommand.setDeviceName(newDeivceName, callback);
   };
   // Parse wps_supplicant event string.
   //
   // @param aEventString The raw event string from wpa_supplicant.
   //
   // @return Object:
   //   .id: a number to represent an event.
   //   .info: the additional information carried by this event string.
   function parseEventString(aEventString) {
     if (isIgnoredEvent(aEventString)) {
       return { id: EVENT_IGNORED };
     }
     let match = RegExp("p2p_dev_addr=([0-9a-fA-F:]+) " +
                        "pri_dev_type=([0-9a-zA-Z-]+) " +
                        "name='(.*)' " +
                        "config_methods=0x([0-9a-fA-F]+) " +
                        "dev_capab=0x([0-9a-fA-F]+) " +
                        "group_capab=0x([0-9a-fA-F]+) ").exec(aEventString + ' ');
     let tokens = aEventString.split(" ");
     let id = EVENT_UNKNOWN;
     // general info.
     let info = {};
     if (match) {
       info = {
         address:   match[1] ? match[1] : null,
         type:      match[2] ? match[2] : null,
         name:      match[3] ? match[3] : null,
         wpsFlag:   match[4] ? parseInt(match[4], 16) : null,
         devFlag:   match[5] ? parseInt(match[5], 16) : null,
         groupFlag: match[6] ? parseInt(match[6], 16) : null
       };
     }
     if (0 === aEventString.indexOf("P2P-DEVICE-FOUND")) {
       id = EVENT_P2P_DEVICE_FOUND;
       info.wpsCapabilities = wpsFlagToCapabilities(info.wpsFlag);
       info.isGroupOwner = isPeerGroupOwner(info.groupFlag);
     } else if (0 === aEventString.indexOf("P2P-DEVICE-LOST")) {
       // e.g. "P2P-DEVICE-LOST p2p_dev_addr=5e:0a:5b:15:1f:80".
       id = EVENT_P2P_DEVICE_LOST;
       info.address = /p2p_dev_addr=([0-9a-f:]+)/.exec(aEventString)[1];
     } else if (0 === aEventString.indexOf("P2P-GROUP-STARTED")) {
       // e.g. "P2P-GROUP-STARTED wlan0-p2p-0 GO ssid="DIRECT-3F Testing
       //       passphrase="12345678" go_dev_addr=02:40:61:c2:f3:b7 [PERSISTENT]".
       id = EVENT_P2P_GROUP_STARTED;
       let groupMatch = RegExp('ssid="(.*)" ' +
                               'freq=([0-9]*) ' +
                               '(passphrase|psk)=([^ ]+) ' +
                               'go_dev_addr=([0-9a-f:]+)').exec(aEventString);
       info.ssid = groupMatch[1];
       info.freq = groupMatch[2];
       if ('passphrase' === groupMatch[3]) {
         let s = groupMatch[4]; // e.g. "G7jHkkz9".
         info.passphrase = s.substring(1, s.length-1); // Trim the double quote.
       } else { // psk
         info.psk = groupMatch[4];
       }
       info.goAddress = groupMatch[5];
       info.ifname = tokens[1];
       info.role = tokens[2];
     } else if (0 === aEventString.indexOf("P2P-GROUP-REMOVED")) {
       id = EVENT_P2P_GROUP_REMOVED;
       // e.g. "P2P-GROUP-REMOVED wlan0-p2p-0 GO".
       info.ifname = tokens[1];
       info.role = tokens[2];
     } else if (0 === aEventString.indexOf("P2P-PROV-DISC-PBC-REQ")) {
       id = EVENT_P2P_PROV_DISC_PBC_REQ;
       info.wpsMethod = WPS_METHOD_PBC;
     } else if (0 === aEventString.indexOf("P2P-PROV-DISC-PBC-RESP")) {
       id = EVENT_P2P_PROV_DISC_PBC_RESP;
       // The address is different from the general pattern.
       info.address = aEventString.split(" ")[1];
       info.wpsMethod = WPS_METHOD_PBC;
     } else if (0 === aEventString.indexOf("P2P-PROV-DISC-SHOW-PIN")) {
       id = EVENT_P2P_PROV_DISC_SHOW_PIN;
       // Obtain peer address and pin from tokens.
       info.address = tokens[1];
       info.pin     = tokens[2];
       info.wpsMethod = WPS_METHOD_DISPLAY;
     } else if (0 === aEventString.indexOf("P2P-PROV-DISC-ENTER-PIN")) {
       id = EVENT_P2P_PROV_DISC_ENTER_PIN;
       // Obtain peer address from tokens.
       info.address = tokens[1];
       info.wpsMethod = WPS_METHOD_KEYPAD;
     } else if (0 === aEventString.indexOf("P2P-GO-NEG-REQUEST")) {
       id = EVENT_P2P_GO_NEG_REQUEST;
       info.address = tokens[1];
       switch (parseInt(tokens[2].split("=")[1], 10)) {
         case DEV_PW_REGISTRAR_SPECIFIED: // (5) Peer is display.
           info.wpsMethod = WPS_METHOD_KEYPAD;
           break;
         case DEV_PW_USER_SPECIFIED: // (1) Peer is keypad.
           info.wpsMethod = WPS_METHOD_DISPLAY;
           break;
         case DEV_PW_PUSHBUTTON: // (4) Peer is pbc.
           info.wpsMethod = WPS_METHOD_PBC;
           break;
         default:
           debug('Unknown wps method from event P2P-GO-NEG-REQUEST');
           break;
       }
     } else if (0 === aEventString.indexOf("P2P-GO-NEG-SUCCESS")) {
       id = EVENT_P2P_GO_NEG_SUCCESS;
     } else if (0 === aEventString.indexOf("P2P-GO-NEG-FAILURE")) {
       id = EVENT_P2P_GO_NEG_FAILURE;
     } else if (0 === aEventString.indexOf("P2P-GROUP-FORMATION-FAILURE")) {
       id = EVENT_P2P_GROUP_FORMATION_FAILURE;
     } else if (0 === aEventString.indexOf("P2P-GROUP-FORMATION-SUCCESS")) {
       id = EVENT_P2P_GROUP_FORMATION_SUCCESS;
     } else if (0 === aEventString.indexOf("P2P-FIND-STOPPED")) {
       id = EVENT_P2P_FIND_STOPPED;
     } else if (0 === aEventString.indexOf("P2P-INVITATION-RESULT")) {
       id = EVENT_P2P_INVITATION_RESULT;
       info.status = /status=([0-9]+)/.exec(aEventString)[1];
     } else if (0 === aEventString.indexOf("P2P-INVITATION-RECEIVED")) {
       // e.g. "P2P-INVITATION-RECEIVED sa=32:85:a9:da:e6:1f persistent=7".
       id = EVENT_P2P_INVITATION_RECEIVED;
       info.address = /sa=([0-9a-f:]+)/.exec(aEventString)[1];
       info.netId = /persistent=([0-9]+)/.exec(aEventString)[1];
     } else if (0 === aEventString.indexOf("P2P-PROV-DISC-FAILURE")) {
       id = EVENT_P2P_PROV_DISC_FAILURE;
     } else {
       // Not P2P event but we do receive it. Try to recognize it.
       if (0 === aEventString.indexOf("AP-STA-DISCONNECTED")) {
         id = EVENT_AP_STA_DISCONNECTED;
         info.address = tokens[1];
       } else if (0 === aEventString.indexOf("AP-STA-CONNECTED")) {
         id = EVENT_AP_STA_CONNECTED;
         info.address = tokens[1];
       } else {
         // Neither P2P event nor recognized supplicant event.
         debug('Unknwon event string: ' + aEventString);
       }
     }
     let event = {id: id, info: info};
     debug('Event parsing result: ' + aEventString + ": " + JSON.stringify(event));
     return event;
   }
   function isIgnoredEvent(aEventString) {
     const IGNORED_EVENTS = [
       "CTRL-EVENT-BSS-ADDED",
       "CTRL-EVENT-BSS-REMOVED",
       "CTRL-EVENT-SCAN-RESULTS",
       "CTRL-EVENT-STATE-CHANGE",
       "WPS-AP-AVAILABLE",
       "WPS-ENROLLEE-SEEN"
     ];
     for(let i = 0; i < IGNORED_EVENTS.length; i++) {
       if (0 === aEventString.indexOf(IGNORED_EVENTS[i])) {
         return true;
       }
     }
     return false;
   }
   function isPeerGroupOwner(aGroupFlag) {
     return (aGroupFlag & GROUP_CAPAB_GROUP_OWNER) !== 0;
   }
   // Convert flag to a wps capability array.
   //
   // @param aWpsFlag Number that represents the wps capabilities.
   // @return Array of WPS flag.
   function wpsFlagToCapabilities(aWpsFlag) {
     let wpsCapabilities = [];
     if (aWpsFlag & 0x8) {
       wpsCapabilities.push(WPS_METHOD_DISPLAY);
     }
     if (aWpsFlag & 0x80) {
       wpsCapabilities.push(WPS_METHOD_PBC);
     }
     if (aWpsFlag & 0x100) {
       wpsCapabilities.push(WPS_METHOD_KEYPAD);
     }
     return wpsCapabilities;
   }
   _stateMachine.start();
   return manager;
 };
 function P2pStateMachine(aP2pCommand, aNetUtil) {
   function debug(aMsg) {
     if (gDebug) {
       dump('-------------- WifiP2pStateMachine: ' + aMsg);
     }
   }
   let p2pSm = {};  // The state machine to return.
   let _sm = StateMachine('WIFIP2P'); // The general purpose state machine.
   // Information we need to keep track across states.
   let _observer;
   let _onEnabled;
   let _onDisabled;
   let _onSupplicantConnected;
   let _savedConfig = {}; // Configuration used to do P2P_CONNECT.
   let _groupInfo = {};   // The information of the group we have formed.
   let _removedGroupInfo = {}; // Used to store the group info we are going to remove.
   let _scanBlocked = false;
   let _scanPostponded = false;
   let _localDevice = {
     address: "",
     deviceName: DEFAULT_P2P_DEVICE_NAME + "_" + libcutils.property_get("ro.build.product"),
     wpsCapabilities: [WPS_METHOD_PBC, WPS_METHOD_KEYPAD, WPS_METHOD_DISPLAY]
   };
   let _p2pNetworkInterface = {
     QueryInterface: XPCOMUtils.generateQI([Ci.nsINetworkInterface]),
     state: Ci.nsINetworkInterface.NETWORK_STATE_DISCONNECTED,
     type: Ci.nsINetworkInterface.NETWORK_TYPE_WIFI_P2P,
     name: P2P_INTERFACE_NAME,
     ips: [],
     prefixLengths: [],
     dnses: [],
     gateways: [],
     httpProxyHost: null,
     httpProxyPort: null,
     // help
     registered: false,
     getAddresses: function (ips, prefixLengths) {
       ips.value = this.ips.slice();
       prefixLengths.value = this.prefixLengths.slice();
       return this.ips.length;
     },
     getGateways: function (count) {
       if (count) {
         count.value = this.gateways.length;
       }
       return this.gateways.slice();
     },
     getDnses: function (count) {
       if (count) {
         count.value = this.dnses.length;
       }
       return this.dnses.slice();
     }
   };
   //---------------------------------------------------------
   // State machine APIs.
   //---------------------------------------------------------
   // Register the observer which is implemented in WifiP2pWorkerObserver.jsm.
   //
   // @param aObserver:
   //   .onEnabled
   //   .onDisbaled
   //   .onPeerFound
   //   .onPeerLost
   //   .onConnecting
   //   .onConnected
   //   .onDisconnected
   //   .onLocalDeviceChanged
   p2pSm.setObserver = function(aObserver) {
     _observer = aObserver;
   };
   p2pSm.start = function() {
     _sm.start(stateDisabled);
   };
   p2pSm.sendEvent = function(aEvent) {
     let willBeHandled = isInP2pManagedState(_sm.getCurrentState());
     _sm.sendEvent(aEvent);
     return willBeHandled;
   };
   // Initialize internal state machine _sm.
   _sm.setDefaultEventHandler(handleEventCommon);
   //----------------------------------------------------------
   // State definition.
   //----------------------------------------------------------
   // The initial state.
   var stateDisabled = _sm.makeState("DISABLED", {
     enter: function() {
       _onEnabled = null;
       _onSupplicantConnected = null;
       _savedConfig = null;
       _groupInfo = null;
       _removedGroupInfo = null;
       _scanBlocked = false;
       _scanPostponded = false;
       unregisterP2pNetworkInteface();
     },
     handleEvent: function(aEvent) {
       switch (aEvent.id) {
         case EVENT_P2P_CMD_ENABLE:
           _onEnabled = aEvent.info.onEnabled;
           _onSupplicantConnected = aEvent.info.onSupplicantConnected;
           _sm.gotoState(stateEnabling);
           break;
         default:
           return false;
       } // End of switch.
       return true;
     }
   });
   // The state where we are trying to enable wifi p2p.
   var stateEnabling = _sm.makeState("ENABLING", {
     enter: function() {
       function onFailure()
       {
         _onEnabled(false);
         _sm.gotoState(stateDisabled);
       }
       function onSuccess()
       {
         _onEnabled(true);
         _sm.gotoState(stateInactive);
       }
       _sm.pause();
       // Step 1: Connect to p2p0.
       aP2pCommand.connectToSupplicant(function (status) {
         let detail;
         if (0 !== status) {
           debug('Failed to connect to p2p0');
           onFailure();
           return;
         }
         debug('wpa_supplicant p2p0 connected!');
         _onSupplicantConnected();
         // Step 2: Get MAC address.
         if (!_localDevice.address) {
           aP2pCommand.getMacAddress(function (address) {
             if (!address) {
               debug('Failed to get MAC address....');
               onFailure();
               return;
             }
             debug('Got mac address: ' + address);
             _localDevice.address = address;
             _observer.onLocalDeviceChanged(_localDevice);
           });
         }
         // Step 3: Enable p2p with the device name and wps methods.
         detail = { deviceName: _localDevice.deviceName,
                    deviceType: libcutils.property_get("ro.moz.wifi.p2p_device_type") || DEFAULT_P2P_DEVICE_TYPE,
                    wpsMethods: libcutils.property_get("ro.moz.wifi.p2p_wps_methods") || DEFAULT_P2P_WPS_METHODS };
         aP2pCommand.p2pEnable(detail, function (success) {
           if (!success) {
             debug('Failed to enable p2p');
             onFailure();
             return;
           }
           debug('P2P is enabled! Enabling net interface...');
           // Step 4: Enable p2p0 net interface. wpa_supplicant may have
           //         already done it for us.
           aNetUtil.enableInterface(P2P_INTERFACE_NAME, function (success) {
             onSuccess();
           });
         });
       });
     },
     handleEvent: function(aEvent) {
       // We won't receive any event since all of them will be blocked.
       return true;
     }
   });
   // The state just after enabling wifi direct.
   var stateInactive = _sm.makeState("INACTIVE", {
     enter: function() {
       registerP2pNetworkInteface();
       if (_sm.getPreviousState() !== stateEnabling) {
         _observer.onDisconnected(_savedConfig);
       }
       _savedConfig = null; // Used to connect p2p peer.
       _groupInfo   = null; // The information of the formed group.
     },
     handleEvent: function(aEvent) {
       switch (aEvent.id) {
         // Receiving the following 3 states implies someone is trying to
         // connect to me.
         case EVENT_P2P_PROV_DISC_PBC_REQ:
         case EVENT_P2P_PROV_DISC_SHOW_PIN:
         case EVENT_P2P_PROV_DISC_ENTER_PIN:
           debug('Someone is trying to connect to me: ' + JSON.stringify(aEvent.info));
           _savedConfig = {
             name:      aEvent.info.name,
             address:   aEvent.info.address,
             wpsMethod: aEvent.info.wpsMethod,
             goIntent:  DEFAULT_GO_INTENT,
             pin:       aEvent.info.pin // EVENT_P2P_PROV_DISC_SHOW_PIN only.
           };
           _sm.gotoState(stateWaitingForConfirmation);
           break;
         // Connect to a peer.
         case EVENT_P2P_CMD_CONNECT:
           debug('Trying to connect to peer: ' + JSON.stringify(aEvent.info));
           _savedConfig = {
             address:   aEvent.info.address,
             wpsMethod: aEvent.info.wpsMethod,
             goIntent:  aEvent.info.goIntent
           };
           _sm.gotoState(stateProvisionDiscovery);
           aEvent.info.onDoConnect(true);
           break;
         case EVENT_P2P_INVITATION_RECEIVED:
           _savedConfig = {
             address: aEvent.info.address,
             wpsMethod: WPS_METHOD_PBC,
             goIntent: DEFAULT_GO_INTENT,
             netId: aEvent.info.netId
           };
           _sm.gotoState(stateWaitingForInvitationConfirmation);
           break;
         case EVENT_P2P_GROUP_STARTED:
           // Most likely the peer just reinvoked a peristen group and succeeeded.
           _savedConfig = { address: aEvent.info.goAddress };
           _sm.pause();
           handleGroupStarted(aEvent.info, function (success) {
             _sm.resume();
           });
           break;
         case EVENT_AP_STA_DISCONNECTED:
           // We will hit this case when we used to be a group owner and
           // requested to remove the group we owned.
           break;
         default:
           return false;
       } // End of switch.
       return true;
     },
   });
   // Waiting for user's confirmation.
   var stateWaitingForConfirmation = _sm.makeState("WAITING_FOR_CONFIRMATION", {
     timeoutTimer: null,
     enter: function() {
       gSysMsgr.broadcastMessage(PAIRING_REQUEST_SYS_MSG, _savedConfig);
       this.timeoutTimer = initTimeoutTimer(30000, EVENT_TIMEOUT_PAIRING_CONFIRMATION);
     },
     handleEvent: function(aEvent) {
       switch (aEvent.id) {
         case EVENT_P2P_SET_PAIRING_CONFIRMATION:
           if (!aEvent.info.accepted) {
             debug('User rejected this request');
             _sm.gotoState(stateInactive); // Reset to inactive state.
             break;
           }
           debug('User accepted this request');
           // The only information we may have to grab from user.
           _savedConfig.pin = aEvent.info.pin;
           // The case that user requested to form a group ealier on.
           // Just go to connecting state and do p2p_connect.
           if (_sm.getPreviousState() === stateProvisionDiscovery) {
             _sm.gotoState(stateConnecting);
             break;
           }
           // Otherwise, wait for EVENT_P2P_GO_NEG_REQUEST.
           _sm.gotoState(stateWaitingForNegReq);
           break;
         case EVENT_TIMEOUT_PAIRING_CONFIRMATION:
           debug('Confirmation timeout!');
           _sm.gotoState(stateInactive);
           break;
         case EVENT_P2P_GO_NEG_REQUEST:
           _sm.deferEvent(aEvent);
           break;
         default:
           return false;
       } // End of switch.
       return true;
     },
     exit: function() {
       this.timeoutTimer.cancel();
       this.timeoutTimer = null;
     }
   });
   var stateWaitingForNegReq = _sm.makeState("WAITING_FOR_NEG_REQ", {
     timeoutTimer: null,
     enter: function() {
       debug('Wait for EVENT_P2P_GO_NEG_REQUEST');
       this.timeoutTimer = initTimeoutTimer(30000, EVENT_TIMEOUT_NEG_REQ);
     },
     handleEvent: function(aEvent) {
       switch (aEvent.id) {
         case EVENT_P2P_GO_NEG_REQUEST:
           if (aEvent.info.wpsMethod !== _savedConfig.wpsMethod) {
             debug('Unmatched wps method: ' + aEvent.info.wpsMethod + ", " + _savedConfig.wpsMetho);
           }
           _sm.gotoState(stateConnecting);
           break;
         case EVENT_TIMEOUT_NEG_REQ:
           debug("Waiting for NEG-REQ timeout");
           _sm.gotoState(stateInactive);
           break;
         default:
           return false;
       } // End of switch.
       return true;
     },
     exit: function() {
       this.timeoutTimer.cancel();
       this.timeoutTimer = null;
     }
   });
   // Waiting for user's confirmation for invitation.
   var stateWaitingForInvitationConfirmation = _sm.makeState("WAITING_FOR_INV_CONFIRMATION", {
     timeoutTimer: null,
     enter: function() {
       gSysMsgr.broadcastMessage(PAIRING_REQUEST_SYS_MSG, _savedConfig);
       this.timeoutTimer = initTimeoutTimer(30000, EVENT_TIMEOUT_PAIRING_CONFIRMATION);
     },
     handleEvent: function(aEvent) {
       switch (aEvent.id) {
         case EVENT_P2P_SET_PAIRING_CONFIRMATION:
           if (!aEvent.info.accepted) {
             debug('User rejected this request');
             _sm.gotoState(stateInactive); // Reset to inactive state.
             break;
           }
           debug('User accepted this request');
           _sm.pause();
           aP2pCommand.p2pGetGroupCapab(_savedConfig.address, function (gc) {
             let isPeeGroupOwner = gc & GROUP_CAPAB_GROUP_OWNER;
             _sm.gotoState(isPeeGroupOwner ? stateGroupAdding : stateReinvoking);
           });
           break;
         case EVENT_TIMEOUT_PAIRING_CONFIRMATION:
           debug('Confirmation timeout!');
           _sm.gotoState(stateInactive);
           break;
         default:
           return false;
       } // End of switch.
       return true;
     },
     exit: function() {
       this.timeoutTimer.cancel();
       this.timeoutTimer = null;
     }
   });
   var stateGroupAdding = _sm.makeState("GROUP_ADDING", {
     timeoutTimer: null,
     enter: function() {
       let self = this;
       _observer.onConnecting(_savedConfig);
       _sm.pause();
       aP2pCommand.p2pGroupAdd(_savedConfig.netId, function (success) {
         if (!success) {
           _sm.gotoState(stateInactive);
           return;
         }
         // Waiting for EVENT_P2P_GROUP_STARTED.
         self.timeoutTimer = initTimeoutTimer(60000, EVENT_TIMEOUT_CONNECTING);
         _sm.resume();
       });
     },
     handleEvent: function(aEvent) {
       switch (aEvent.id) {
         case EVENT_P2P_GROUP_STARTED:
           _sm.pause();
           handleGroupStarted(aEvent.info, function (success) {
             _sm.resume();
           });
           break;
         case EVENT_P2P_GO_NEG_FAILURE:
           debug('Negotiation failure. Go back to inactive state');
           _sm.gotoState(stateInactive);
           break;
         case EVENT_TIMEOUT_CONNECTING:
           debug('Connecting timeout! Go back to inactive state');
           _sm.gotoState(stateInactive);
           break;
         case EVENT_P2P_GROUP_FORMATION_SUCCESS:
         case EVENT_P2P_GO_NEG_SUCCESS:
           break;
         case EVENT_P2P_GROUP_FORMATION_FAILURE:
           debug('Group formation failure');
           _sm.gotoState(stateInactive);
           break;
         case EVENT_P2P_GROUP_REMOVED:
           debug('Received P2P-GROUP-REMOVED due to previous failed handleGroupdStarted()');
           _removedGroupInfo = {
             role:   aEvent.info.role,
             ifname: aEvent.info.ifname
           };
           _sm.gotoState(stateDisconnecting);
           break;
         default:
           return false;
       } // End of switch.
       return true;
     },
     exit: function() {
       this.timeoutTimer.cancel();
       this.timeoutTimer = null;
     }
   });
   var stateReinvoking = _sm.makeState("REINVOKING", {
     timeoutTimer: null,
     enter: function() {
       let self = this;
       _observer.onConnecting(_savedConfig);
       _sm.pause();
       aP2pCommand.p2pReinvoke(_savedConfig.netId, _savedConfig.address, function(success) {
         if (!success) {
           _sm.gotoState(stateInactive);
           return;
         }
         // Waiting for EVENT_P2P_GROUP_STARTED.
         self.timeoutTimer = initTimeoutTimer(60000, EVENT_TIMEOUT_CONNECTING);
         _sm.resume();
       });
     },
     handleEvent: function(aEvent) {
       switch (aEvent.id) {
         case EVENT_P2P_GROUP_STARTED:
           _sm.pause();
           handleGroupStarted(aEvent.info, function(success) {
             _sm.resume();
           });
           break;
         case EVENT_P2P_GO_NEG_FAILURE:
           debug('Negotiation failure. Go back to inactive state');
           _sm.gotoState(stateInactive);
           break;
         case EVENT_TIMEOUT_CONNECTING:
           debug('Connecting timeout! Go back to inactive state');
           _sm.gotoState(stateInactive);
           break;
         case EVENT_P2P_GROUP_FORMATION_SUCCESS:
         case EVENT_P2P_GO_NEG_SUCCESS:
           break;
         case EVENT_P2P_GROUP_FORMATION_FAILURE:
           debug('Group formation failure');
           _sm.gotoState(stateInactive);
           break;
         case EVENT_P2P_GROUP_REMOVED:
           debug('Received P2P-GROUP-REMOVED due to previous failed handleGroupdStarted()');
           _removedGroupInfo = {
             role:   aEvent.info.role,
             ifname: aEvent.info.ifname
           };
           _sm.gotoState(stateDisconnecting);
           break;
         default:
           return false;
       } // End of switch.
       return true;
     },
     exit: function() {
       this.timeoutTimer.cancel();
     }
   });
   var stateProvisionDiscovery = _sm.makeState("PROVISION_DISCOVERY", {
     enter: function() {
       function onDiscoveryCommandSent(success) {
         if (!success) {
           _sm.gotoState(stateInactive);
           debug('Failed to send p2p_prov_disc. Go back to inactive state.');
           return;
         }
         debug('p2p_prov_disc has been sent.');
         _sm.resume();
         // Waiting for EVENT_P2P_PROV_DISC_PBC_RESP or
         //             EVENT_P2P_PROV_DISC_SHOW_PIN or
         //             EVENT_P2P_PROV_DISC_ENTER_PIN.
       }
       _sm.pause();
       aP2pCommand.p2pProvDiscovery(_savedConfig.address,
                                    toPeerWpsMethod(_savedConfig.wpsMethod),
                                    onDiscoveryCommandSent);
     },
     handleEvent: function(aEvent) {
       switch (aEvent.id) {
         case EVENT_P2P_PROV_DISC_PBC_RESP:
           _sm.gotoState(stateConnecting); // No need for local user grant.
           break;
         case EVENT_P2P_PROV_DISC_SHOW_PIN:
         case EVENT_P2P_PROV_DISC_ENTER_PIN:
           if (aEvent.info.wpsMethod !== _savedConfig.wpsMethod) {
             debug('Unmatched wps method: ' + aEvent.info.wpsMethod + ":" + _savedConfig.wpsMethod);
           }
           if (EVENT_P2P_PROV_DISC_SHOW_PIN === aEvent.id) {
             _savedConfig.pin = aEvent.info.pin;
           }
           _sm.gotoState(stateWaitingForConfirmation);
           break;
         case EVENT_P2P_PROV_DISC_FAILURE:
           _sm.gotoState(stateInactive);
           break;
         default:
           return false;
       } // End of switch.
       return true;
     }
   });
   // We are going to connect to the peer.
   // |_savedConfig| is supposed to have been filled properly.
   var stateConnecting = _sm.makeState("CONNECTING", {
     timeoutTimer: null,
     enter: function() {
       let self = this;
       if (null === _savedConfig.goIntent) {
         _savedConfig.goIntent = DEFAULT_GO_INTENT;
       }
       _observer.onConnecting(_savedConfig);
       let wpsMethodWithPin;
       if (WPS_METHOD_KEYPAD === _savedConfig.wpsMethod ||
           WPS_METHOD_DISPLAY === _savedConfig.wpsMethod) {
         // e.g. '12345678 display or '12345678 keypad'.
         wpsMethodWithPin = (_savedConfig.pin + ' ' + _savedConfig.wpsMethod);
       } else {
         // e.g. 'pbc'.
         wpsMethodWithPin = _savedConfig.wpsMethod;
       }
       _sm.pause();
       aP2pCommand.p2pGetGroupCapab(_savedConfig.address, function(gc) {
         debug('group capabilities of ' + _savedConfig.address + ': ' + gc);
         let isPeerGroupOwner = gc & GROUP_CAPAB_GROUP_OWNER;
         let config = { address:           _savedConfig.address,
                        wpsMethodWithPin:  wpsMethodWithPin,
                        goIntent:          _savedConfig.goIntent,
                        joinExistingGroup: isPeerGroupOwner };
         aP2pCommand.p2pConnect(config, function (success) {
           if (!success) {
             debug('Failed to send p2p_connect');
             _sm.gotoState(stateInactive);
             return;
           }
           debug('Waiting for EVENT_P2P_GROUP_STARTED.');
           self.timeoutTimer = initTimeoutTimer(60000, EVENT_TIMEOUT_CONNECTING);
           _sm.resume();
         });
       });
     },
     handleEvent: function(aEvent) {
       switch (aEvent.id) {
         case EVENT_P2P_GROUP_STARTED:
           _sm.pause();
           handleGroupStarted(aEvent.info, function (success) {
             _sm.resume();
           });
           break;
         case EVENT_P2P_GO_NEG_FAILURE:
           debug('Negotiation failure. Go back to inactive state');
           _sm.gotoState(stateInactive);
           break;
         case EVENT_TIMEOUT_CONNECTING:
           debug('Connecting timeout! Go back to inactive state');
           _sm.gotoState(stateInactive);
           break;
         case EVENT_P2P_GROUP_FORMATION_SUCCESS:
         case EVENT_P2P_GO_NEG_SUCCESS:
           break;
         case EVENT_P2P_GROUP_FORMATION_FAILURE:
           debug('Group formation failure');
           _sm.gotoState(stateInactive);
           break;
         case EVENT_P2P_GROUP_REMOVED:
           debug('Received P2P-GROUP-REMOVED due to previous failed ' +
                 'handleGroupdStarted()');
           _removedGroupInfo = {
             role:   aEvent.info.role,
             ifname: aEvent.info.ifname
           };
           _sm.gotoState(stateDisconnecting);
           break;
         default:
           return false;
       } // End of switch.
       return true;
     },
     exit: function() {
       this.timeoutTimer.cancel();
     }
   });
   var stateConnected = _sm.makeState("CONNECTED", {
     groupOwner: null,
     enter: function() {
       this.groupOwner = {
         macAddress: _groupInfo.goAddress,
         ipAddress:  _groupInfo.networkInterface.gateway,
         passphrase: _groupInfo.passphrase,
         ssid:       _groupInfo.ssid,
         freq:       _groupInfo.freq,
         isLocal:    _groupInfo.isGroupOwner
       };
       if (!_groupInfo.isGroupOwner) {
         _observer.onConnected(this.groupOwner, _savedConfig);
       } else {
         // If I am a group owner, notify onConnected until EVENT_AP_STA_CONNECTED
         // is received.
       }
       _removedGroupInfo = null;
     },
     handleEvent: function(aEvent) {
       switch (aEvent.id) {
         case EVENT_AP_STA_CONNECTED:
           if (_groupInfo.isGroupOwner) {
             _observer.onConnected(this.groupOwner, _savedConfig);
           }
           break;
         case EVENT_P2P_GROUP_REMOVED:
           _removedGroupInfo = {
             role:   aEvent.info.role,
             ifname: aEvent.info.ifname
           };
           _sm.gotoState(stateDisconnecting);
           break;
         case EVENT_AP_STA_DISCONNECTED:
           debug('Client disconnected: ' + aEvent.info.address);
           // Now we suppose it's the only client. Remove my group.
           _sm.pause();
           aP2pCommand.p2pGroupRemove(_groupInfo.ifname, function (success) {
             debug('Requested to remove p2p group. Wait for EVENT_P2P_GROUP_REMOVED.');
             _sm.resume();
           });
           break;
         case EVENT_P2P_CMD_DISCONNECT:
           // Since we only support single connection, we can ignore
           // the given peer address.
           _sm.pause();
           aP2pCommand.p2pGroupRemove(_groupInfo.ifname, function(success) {
             aEvent.info.onDoDisconnect(true);
             _sm.resume();
           });
           debug('Sent disconnect command. Wait for EVENT_P2P_GROUP_REMOVED.');
           break;
         case EVENT_P2P_PROV_DISC_PBC_REQ:
         case EVENT_P2P_PROV_DISC_SHOW_PIN:
         case EVENT_P2P_PROV_DISC_ENTER_PIN:
           debug('Someone is trying to connect to me: ' + JSON.stringify(aEvent.info));
           _savedConfig = {
             name:      aEvent.info.name,
             address:   aEvent.info.address,
             wpsMethod: aEvent.info.wpsMethod,
             pin:       aEvent.info.pin
           };
           _sm.gotoState(stateWaitingForJoiningConfirmation);
           break;
         default:
           return false;
       } // end of switch
       return true;
     }
   });
   var stateWaitingForJoiningConfirmation = _sm.makeState("WAITING_FOR_JOINING_CONFIRMATION", {
     timeoutTimer: null,
     enter: function() {
       gSysMsgr.broadcastMessage(PAIRING_REQUEST_SYS_MSG, _savedConfig);
       this.timeoutTimer = initTimeoutTimer(30000, EVENT_TIMEOUT_PAIRING_CONFIRMATION);
     },
     handleEvent: function (aEvent) {
       switch (aEvent.id) {
         case EVENT_P2P_SET_PAIRING_CONFIRMATION:
           if (!aEvent.info.accepted) {
             debug('User rejected invitation!');
             _sm.gotoState(stateConnected);
             break;
           }
           let onWpsCommandSent = function(success) {
             _observer.onConnecting(_savedConfig);
             _sm.gotoState(stateConnected);
           };
           _sm.pause();
           if (WPS_METHOD_PBC === _savedConfig.wpsMethod) {
             aP2pCommand.wpsPbc(_groupInfo.ifname, onWpsCommandSent);
           } else {
             let detail = { pin: _savedConfig.pin, iface: _groupInfo.ifname };
             aP2pCommand.wpsPin(detail, onWpsCommandSent);
           }
           break;
         case EVENT_TIMEOUT_PAIRING_CONFIRMATION:
           debug('WAITING_FOR_JOINING_CONFIRMATION timeout!');
           _sm.gotoState(stateConnected);
           break;
         default:
           return false;
       } // End of switch.
       return true;
     },
     exit: function() {
       this.timeoutTimer.cancel();
       this.timeoutTimer = null;
     }
   });
   var stateDisconnecting = _sm.makeState("DISCONNECTING", {
     enter: function() {
       _sm.pause();
       handleGroupRemoved(_removedGroupInfo, function (success) {
         if (!success) {
           debug('Failed to handle group removed event. What can I do?');
         }
         _sm.gotoState(stateInactive);
       });
     },
     handleEvent: function(aEvent) {
       return false; // We will not receive any event in this state.
     }
   });
   var stateDisabling = _sm.makeState("DISABLING", {
     enter: function() {
       _sm.pause();
       aNetUtil.stopDhcpServer(function (success) { // Stopping DHCP server is harmless.
         debug('Stop DHCP server result: ' + success);
         aP2pCommand.p2pDisable(function(success) {
           debug('P2P function disabled');
           aP2pCommand.closeSupplicantConnection(function (status) {
             debug('Supplicant connection closed');
             aNetUtil.disableInterface(P2P_INTERFACE_NAME, function (success){
               debug('Disabled interface: ' + P2P_INTERFACE_NAME);
               _onDisabled(true);
               _sm.gotoState(stateDisabled);
             });
           });
         });
       });
     },
     handleEvent: function(aEvent) {
       return false; // We will not receive any event in this state.
     }
   });
   //----------------------------------------------------------
   // Helper functions.
   //----------------------------------------------------------
   // Handle 'P2P_GROUP_STARTED' event. Note that this function
   // will also do the state transitioning and error handling.
   //
   // @param aInfo Information carried by "P2P_GROUP_STARTED" event:
   //   .role: P2P_ROLE_GO or P2P_ROLE_CLIENT
   //   .ssid:
   //   .freq:
   //   .passphrase: Used to connect to GO for legacy device.
   //   .goAddress:
   //   .ifname: e.g. p2p-p2p0
   //
   // @param aCallback Callback function.
   function handleGroupStarted(aInfo, aCallback) {
     debug('handleGroupStarted: ' + JSON.stringify(aInfo));
     function onSuccess()
     {
       _sm.gotoState(stateConnected);
       aCallback(true);
     }
     function onFailure()
     {
       debug('Failed to handleGroupdStarted(). Remove the group...');
       aP2pCommand.p2pGroupRemove(aInfo.ifname, function (success) {
         aCallback(false);
         if (success) {
           return; // Stay in current state and wait for EVENT_P2P_GROUP_REMOVED.
         }
         debug('p2pGroupRemove command error!');
         _sm.gotoState(stateInactive);
       });
     }
     // Save this group information.
     _groupInfo = aInfo;
     _groupInfo.isGroupOwner = (P2P_ROLE_GO === aInfo.role);
     if (_groupInfo.isGroupOwner) {
       debug('Group owner. Start DHCP server');
       let dhcpServerConfig = { ifname: aInfo.ifname,
                                startIp: GO_DHCP_SERVER_IP_RANGE.startIp,
                                endIp: GO_DHCP_SERVER_IP_RANGE.endIp,
                                serverIp: GO_NETWORK_INTERFACE.ip,
                                maskLength: GO_NETWORK_INTERFACE.maskLength };
       aNetUtil.startDhcpServer(dhcpServerConfig, function (success) {
         if (!success) {
           debug('Failed to start DHCP server');
           onFailure();
           return;
         }
         // Update p2p network interface.
         _p2pNetworkInterface.state = Ci.nsINetworkInterface.NETWORK_STATE_CONNECTED;
         _p2pNetworkInterface.ips = [GO_NETWORK_INTERFACE.ip];
         _p2pNetworkInterface.prefixLengths = [GO_NETWORK_INTERFACE.maskLength];
         _p2pNetworkInterface.gateways = [GO_NETWORK_INTERFACE.ip];
         handleP2pNetworkInterfaceStateChanged();
         _groupInfo.networkInterface = _p2pNetworkInterface;
         debug('Everything is done. Happy p2p GO~');
         onSuccess();
       });
       return;
     }
     // We are the client.
     debug("Client. Request IP from DHCP server on interface: " + _groupInfo.ifname);
     aNetUtil.runDhcp(aInfo.ifname, function(dhcpData) {
       if(!dhcpData || !dhcpData.info) {
         debug('Failed to run DHCP client');
         onFailure();
         return;
       }
       // Save network interface.
       debug("DHCP request success: " + JSON.stringify(dhcpData.info));
       // Update p2p network interface.
       let maskLength =
         netHelpers.getMaskLength(netHelpers.stringToIP(dhcpData.info.mask_str));
       if (!maskLength) {
         maskLength = 32; // max prefix for IPv4.
       }
       _p2pNetworkInterface.state = Ci.nsINetworkInterface.NETWORK_STATE_CONNECTED;
       _p2pNetworkInterface.ips = [dhcpData.info.ipaddr_str];
       _p2pNetworkInterface.prefixLengths = [maskLength];
       if (typeof dhcpData.info.dns1_str == "string" &&
           dhcpData.info.dns1_str.length) {
         _p2pNetworkInterface.dnses.push(dhcpData.info.dns1_str);
       }
       if (typeof dhcpData.info.dns2_str == "string" &&
           dhcpData.info.dns2_str.length) {
         _p2pNetworkInterface.dnses.push(dhcpData.info.dns2_str);
       }
       _p2pNetworkInterface.gateways = [dhcpData.info.gateway_str];
       handleP2pNetworkInterfaceStateChanged();
       _groupInfo.networkInterface = _p2pNetworkInterface;
       debug('Happy p2p client~');
       onSuccess();
     });
   }
   function resetP2pNetworkInterface() {
     _p2pNetworkInterface.state = Ci.nsINetworkInterface.NETWORK_STATE_DISCONNECTED;
     _p2pNetworkInterface.ips = [];
     _p2pNetworkInterface.prefixLengths = [];
     _p2pNetworkInterface.dnses = [];
     _p2pNetworkInterface.gateways = [];
   }
   function registerP2pNetworkInteface() {
     if (!_p2pNetworkInterface.registered) {
       resetP2pNetworkInterface();
       gNetworkManager.registerNetworkInterface(_p2pNetworkInterface);
       _p2pNetworkInterface.registered = true;
     }
   }
   function unregisterP2pNetworkInteface() {
     if (_p2pNetworkInterface.registered) {
       resetP2pNetworkInterface();
       gNetworkManager.unregisterNetworkInterface(_p2pNetworkInterface);
       _p2pNetworkInterface.registered = false;
     }
   }
   function handleP2pNetworkInterfaceStateChanged() {
     Services.obs.notifyObservers(_p2pNetworkInterface,
                                  kNetworkInterfaceStateChangedTopic,
                                  null);
   }
   // Handle 'P2P_GROUP_STARTED' event.
   //
   // @param aInfo information carried by "P2P_GROUP_REMOVED" event:
   //   .ifname
   //   .role: "GO" or "client".
   //
   // @param aCallback Callback function.
   function handleGroupRemoved(aInfo, aCallback) {
     if (!_groupInfo) {
       debug('No group info. Why?');
       aCallback(true);
       return;
     }
     if (_groupInfo.ifname !== aInfo.ifname ||
         _groupInfo.role   !== aInfo.role) {
       debug('Unmatched group info: ' + JSON.stringify(_groupInfo) +
             ' v.s. ' + JSON.stringify(aInfo));
     }
     // Update p2p network interface.
     _p2pNetworkInterface.state = Ci.nsINetworkInterface.NETWORK_STATE_DISCONNECTED;
     handleP2pNetworkInterfaceStateChanged();
     if (P2P_ROLE_GO === aInfo.role) {
       aNetUtil.stopDhcpServer(function(success) {
         debug('Stop DHCP server result: ' + success);
         aCallback(true);
       });
     } else {
       aNetUtil.stopDhcp(aInfo.ifname, function() {
         aCallback(true);
       });
     }
   }
   // Non state-specific event handler.
   function handleEventCommon(aEvent) {
     switch (aEvent.id) {
       case EVENT_P2P_DEVICE_FOUND:
         _observer.onPeerFound(aEvent.info);
         break;
       case EVENT_P2P_DEVICE_LOST:
         _observer.onPeerLost(aEvent.info);
         break;
       case EVENT_P2P_CMD_DISABLE:
         _onDisabled = aEvent.info.onDisabled;
         _sm.gotoState(stateDisabling);
         break;
       case EVENT_P2P_CMD_ENABLE_SCAN:
         if (_scanBlocked) {
           _scanPostponded = true;
           aEvent.info.callback(true);
           break;
         }
         aP2pCommand.p2pEnableScan(P2P_SCAN_TIMEOUT_SEC, aEvent.info.callback);
         break;
       case EVENT_P2P_CMD_DISABLE_SCAN:
         aP2pCommand.p2pDisableScan(aEvent.info.callback);
         break;
       case EVENT_P2P_FIND_STOPPED:
         break;
       case EVENT_P2P_CMD_BLOCK_SCAN:
         _scanBlocked = true;
         aP2pCommand.p2pDisableScan(function(success) {});
         break;
       case EVENT_P2P_CMD_UNBLOCK_SCAN:
         _scanBlocked = false;
         if (_scanPostponded) {
           aP2pCommand.p2pEnableScan(P2P_SCAN_TIMEOUT_SEC, function(success) {});
         }
         break;
       case EVENT_P2P_CMD_CONNECT:
       case EVENT_P2P_CMD_DISCONNECT:
         debug("The current state couldn't handle connect/disconnect request. Ignore it.");
         break;
       default:
         return false;
     } // End of switch.
     return true;
   }
   function isInP2pManagedState(aState) {
     let p2pManagedStates = [stateWaitingForConfirmation,
                             stateWaitingForNegReq,
                             stateProvisionDiscovery,
                             stateWaitingForInvitationConfirmation,
                             stateGroupAdding,
                             stateReinvoking,
                             stateConnecting,
                             stateConnected,
                             stateDisconnecting];
     for (let i = 0; i < p2pManagedStates.length; i++) {
       if (aState === p2pManagedStates[i]) {
         return true;
       }
     }
     return false;
   }
   function initTimeoutTimer(aTimeoutMs, aTimeoutEvent) {
     let timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
     function onTimerFired() {
       _sm.sendEvent({ id: aTimeoutEvent });
       timer = null;
     }
     timer.initWithCallback(onTimerFired.bind(this), aTimeoutMs,
                            Ci.nsITimer.TYPE_ONE_SHOT);
     return timer;
   }
   // Converts local WPS method to peer WPS method.
   function toPeerWpsMethod(aLocalWpsMethod) {
     switch (aLocalWpsMethod) {
       case WPS_METHOD_DISPLAY:
         return WPS_METHOD_KEYPAD;
       case WPS_METHOD_KEYPAD:
         return WPS_METHOD_DISPLAY;
       case WPS_METHOD_PBC:
         return WPS_METHOD_PBC;
       default:
         return WPS_METHOD_PBC; // Use "push button" as the default method.
     }
   }
   return p2pSm;
 }
 this.WifiP2pManager.INTERFACE_NAME = P2P_INTERFACE_NAME;

The Tor Browser / annotate

dom/wifi/WifiP2pManager.jsm@b8a032363ba2 (annotated)

dom/wifi/WifiP2pManager.jsm