The Tor Browser: ipc/nfc/Nfc.cpp@b8a032363ba2 (annotated)

ipc/nfc/Nfc.cpp@b8a032363ba2 (annotated)

ipc/nfc/Nfc.cpp

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: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* vim: set sw=4 ts=8 et ft=cpp: */
 /* 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/. */
 /* Copyright © 2013, Deutsche Telekom, Inc. */
 #include "mozilla/ipc/Nfc.h"
 #include <fcntl.h>
 #include <sys/socket.h>
 #include <sys/un.h>
 #undef CHROMIUM_LOG
 #if (defined(MOZ_WIDGET_GONK) && defined(DEBUG))
 #include <android/log.h>
 #define CHROMIUM_LOG(args...)  __android_log_print(ANDROID_LOG_INFO, "Gonk", args)
 #else
 #define CHROMIUM_LOG(args...)
 #endif
 #include "jsfriendapi.h"
 #include "mozilla/ArrayUtils.h"
 #include "nsThreadUtils.h" // For NS_IsMainThread.
 USING_WORKERS_NAMESPACE
 using namespace mozilla::ipc;
 namespace {
 const char* NFC_SOCKET_NAME = "/dev/socket/nfcd";
 // Network port to connect to for adb forwarded sockets when doing
 // desktop development.
 const uint32_t NFC_TEST_PORT = 6400;
 nsRefPtr<mozilla::ipc::NfcConsumer> sNfcConsumer;
 class ConnectWorkerToNFC : public WorkerTask
 {
 public:
     ConnectWorkerToNFC()
     { }
     virtual bool RunTask(JSContext* aCx);
 };
 class SendNfcSocketDataTask : public nsRunnable
 {
 public:
     SendNfcSocketDataTask(UnixSocketRawData* aRawData)
         : mRawData(aRawData)
     { }
     NS_IMETHOD Run()
     {
         MOZ_ASSERT(NS_IsMainThread());
         if (!sNfcConsumer ||
             sNfcConsumer->GetConnectionStatus() != SOCKET_CONNECTED) {
             // Probably shuting down.
             delete mRawData;
             return NS_OK;
         }
         sNfcConsumer->SendSocketData(mRawData);
         return NS_OK;
     }
 private:
     UnixSocketRawData* mRawData;
 };
 bool
 PostToNFC(JSContext* aCx,
           unsigned aArgc,
           JS::Value* aVp)
 {
     JS::CallArgs args = JS::CallArgsFromVp(aArgc, aVp);
     NS_ASSERTION(!NS_IsMainThread(), "Expecting to be on the worker thread");
     if (args.length() != 1) {
         JS_ReportError(aCx, "Expecting one argument with the NFC message");
         return false;
     }
     JS::Value v = args[0];
     JSAutoByteString abs;
     void* data;
     size_t size;
     if (JSVAL_IS_STRING(v)) {
         JS::Rooted<JSString*> str(aCx, v.toString());
         if (!abs.encodeUtf8(aCx, str)) {
             return false;
         }
         data = abs.ptr();
         size = abs.length();
     } else if (!JSVAL_IS_PRIMITIVE(v)) {
         JSObject* obj = JSVAL_TO_OBJECT(v);
         if (!JS_IsTypedArrayObject(obj)) {
             JS_ReportError(aCx, "Object passed in wasn't a typed array");
             return false;
         }
         uint32_t type = JS_GetArrayBufferViewType(obj);
         if (type != js::ArrayBufferView::TYPE_INT8 &&
             type != js::ArrayBufferView::TYPE_UINT8 &&
             type != js::ArrayBufferView::TYPE_UINT8_CLAMPED) {
             JS_ReportError(aCx, "Typed array data is not octets");
             return false;
         }
         size = JS_GetTypedArrayByteLength(obj);
         data = JS_GetArrayBufferViewData(obj);
     } else {
         JS_ReportError(aCx,
                        "Incorrect argument. Expecting a string or a typed array");
         return false;
     }
     UnixSocketRawData* raw = new UnixSocketRawData(data, size);
     nsRefPtr<SendNfcSocketDataTask> task =
         new SendNfcSocketDataTask(raw);
     NS_DispatchToMainThread(task);
     return true;
 }
 bool
 ConnectWorkerToNFC::RunTask(JSContext* aCx)
 {
     // Set up the postNFCMessage on the function for worker -> NFC thread
     // communication.
     NS_ASSERTION(!NS_IsMainThread(), "Expecting to be on the worker thread");
     NS_ASSERTION(!JS_IsRunning(aCx), "Are we being called somehow?");
     JS::Rooted<JSObject*> workerGlobal(aCx, JS::CurrentGlobalOrNull(aCx));
     return !!JS_DefineFunction(aCx, workerGlobal,
                                "postNfcMessage", PostToNFC, 1, 0);
 }
 class DispatchNFCEvent : public WorkerTask
 {
 public:
     DispatchNFCEvent(UnixSocketRawData* aMessage)
         : mMessage(aMessage)
     { }
     virtual bool RunTask(JSContext* aCx);
 private:
     nsAutoPtr<UnixSocketRawData> mMessage;
 };
 bool
 DispatchNFCEvent::RunTask(JSContext* aCx)
 {
     JS::Rooted<JSObject*> obj(aCx, JS::CurrentGlobalOrNull(aCx));
     JSObject* array = JS_NewUint8Array(aCx, mMessage->mSize);
     if (!array) {
         return false;
     }
     JS::Rooted<JS::Value> arrayVal(aCx, JS::ObjectValue(*array));
     memcpy(JS_GetArrayBufferViewData(array), mMessage->mData, mMessage->mSize);
     JS::Rooted<JS::Value> rval(aCx);
     return JS_CallFunctionName(aCx, obj, "onNfcMessage", arrayVal, &rval);
 }
 class NfcConnector : public mozilla::ipc::UnixSocketConnector
 {
 public:
     NfcConnector()
     {}
     virtual ~NfcConnector()
     {}
     virtual int Create();
     virtual bool CreateAddr(bool aIsServer,
                             socklen_t& aAddrSize,
                             sockaddr_any& aAddr,
                             const char* aAddress);
     virtual bool SetUp(int aFd);
     virtual bool SetUpListenSocket(int aFd);
     virtual void GetSocketAddr(const sockaddr_any& aAddr,
                                nsAString& aAddrStr);
 };
 int
 NfcConnector::Create()
 {
     MOZ_ASSERT(!NS_IsMainThread());
     int fd = -1;
 #if defined(MOZ_WIDGET_GONK)
     fd = socket(AF_LOCAL, SOCK_STREAM, 0);
 #else
     // If we can't hit a local loopback, fail later in connect.
     fd = socket(AF_INET, SOCK_STREAM, 0);
 #endif
     if (fd < 0) {
         NS_WARNING("Could not open nfc socket!");
         return -1;
     }
     if (!SetUp(fd)) {
         NS_WARNING("Could not set up socket!");
     }
     return fd;
 }
 bool
 NfcConnector::CreateAddr(bool aIsServer,
                          socklen_t& aAddrSize,
                          sockaddr_any& aAddr,
                          const char* aAddress)
 {
     // We never open nfc socket as server.
     MOZ_ASSERT(!aIsServer);
     uint32_t af;
 #if defined(MOZ_WIDGET_GONK)
     af = AF_LOCAL;
 #else
     af = AF_INET;
 #endif
     switch (af) {
     case AF_LOCAL:
         aAddr.un.sun_family = af;
         if(strlen(aAddress) > sizeof(aAddr.un.sun_path)) {
             NS_WARNING("Address too long for socket struct!");
             return false;
         }
         strcpy((char*)&aAddr.un.sun_path, aAddress);
         aAddrSize = strlen(aAddress) + offsetof(struct sockaddr_un, sun_path) + 1;
         break;
     case AF_INET:
         aAddr.in.sin_family = af;
         aAddr.in.sin_port = htons(NFC_TEST_PORT);
         aAddr.in.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
         aAddrSize = sizeof(sockaddr_in);
         break;
     default:
         NS_WARNING("Socket type not handled by connector!");
         return false;
     }
     return true;
 }
 bool
 NfcConnector::SetUp(int aFd)
 {
     // Nothing to do here.
     return true;
 }
 bool
 NfcConnector::SetUpListenSocket(int aFd)
 {
     // Nothing to do here.
     return true;
 }
 void
 NfcConnector::GetSocketAddr(const sockaddr_any& aAddr,
                             nsAString& aAddrStr)
 {
     MOZ_CRASH("This should never be called!");
 }
 } // anonymous namespace
 namespace mozilla {
 namespace ipc {
 NfcConsumer::NfcConsumer(WorkerCrossThreadDispatcher* aDispatcher)
     : mDispatcher(aDispatcher)
     , mShutdown(false)
 {
     mAddress = NFC_SOCKET_NAME;
     ConnectSocket(new NfcConnector(), mAddress.get());
 }
 nsresult
 NfcConsumer::Register(WorkerCrossThreadDispatcher* aDispatcher)
 {
     MOZ_ASSERT(NS_IsMainThread());
     if (sNfcConsumer) {
         return NS_ERROR_FAILURE;
     }
     nsRefPtr<ConnectWorkerToNFC> connection = new ConnectWorkerToNFC();
     if (!aDispatcher->PostTask(connection)) {
         return NS_ERROR_UNEXPECTED;
     }
     // Now that we're set up, connect ourselves to the NFC thread.
     sNfcConsumer = new NfcConsumer(aDispatcher);
     return NS_OK;
 }
 void
 NfcConsumer::Shutdown()
 {
     MOZ_ASSERT(NS_IsMainThread());
     if (sNfcConsumer) {
         sNfcConsumer->mShutdown = true;
         sNfcConsumer->CloseSocket();
         sNfcConsumer = nullptr;
     }
 }
 void
 NfcConsumer::ReceiveSocketData(nsAutoPtr<UnixSocketRawData>& aMessage)
 {
     MOZ_ASSERT(NS_IsMainThread());
     nsRefPtr<DispatchNFCEvent> dre(new DispatchNFCEvent(aMessage.forget()));
     mDispatcher->PostTask(dre);
 }
 void
 NfcConsumer::OnConnectSuccess()
 {
     // Nothing to do here.
     CHROMIUM_LOG("NFC: %s\n", __FUNCTION__);
 }
 void
 NfcConsumer::OnConnectError()
 {
     CHROMIUM_LOG("NFC: %s\n", __FUNCTION__);
     CloseSocket();
 }
 void
 NfcConsumer::OnDisconnect()
 {
     CHROMIUM_LOG("NFC: %s\n", __FUNCTION__);
     if (!mShutdown) {
         ConnectSocket(new NfcConnector(), mAddress.get(),
                       GetSuggestedConnectDelayMs());
     }
 }
 } // namespace ipc
 } // namespace mozilla

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ipc/nfc/Nfc.cpp@b8a032363ba2 (annotated)

ipc/nfc/Nfc.cpp