зеркало из https://github.com/mozilla/gecko-dev.git
115 строки
3.2 KiB
C++
115 строки
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_bluetooth_bluedroid_BluetoothSocketMessageWatcher_h
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#define mozilla_dom_bluetooth_bluedroid_BluetoothSocketMessageWatcher_h
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#include "base/message_loop.h"
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#include "BluetoothCommon.h"
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BEGIN_BLUETOOTH_NAMESPACE
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class BluetoothSocketResultHandler;
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/* |SocketMessageWatcher| receives Bluedroid's socket setup
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* messages on the I/O thread. You need to inherit from this
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* class to make use of it.
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*
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* Bluedroid sends two socket info messages (20 bytes) at
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* the beginning of a connection to both peers.
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*
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* - 1st message: [channel:4]
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* - 2nd message: [size:2][bd address:6][channel:4][connection status:4]
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*
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* On the server side, the second message will contain a
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* socket file descriptor for the connection. The client
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* uses the original file descriptor.
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*/
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class SocketMessageWatcher : public MessageLoopForIO::Watcher
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{
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public:
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static const unsigned char MSG1_SIZE = 4;
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static const unsigned char MSG2_SIZE = 16;
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static const unsigned char OFF_CHANNEL1 = 0;
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static const unsigned char OFF_SIZE = 4;
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static const unsigned char OFF_BDADDRESS = 6;
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static const unsigned char OFF_CHANNEL2 = 12;
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static const unsigned char OFF_STATUS = 16;
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virtual ~SocketMessageWatcher();
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virtual void Proceed(BluetoothStatus aStatus) = 0;
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void OnFileCanReadWithoutBlocking(int aFd) override;
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void OnFileCanWriteWithoutBlocking(int aFd) override;
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void Watch();
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void StopWatching();
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bool IsComplete() const;
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int GetFd() const;
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int32_t GetChannel1() const;
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int32_t GetSize() const;
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nsString GetBdAddress() const;
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int32_t GetChannel2() const;
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int32_t GetConnectionStatus() const;
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int GetClientFd() const;
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BluetoothSocketResultHandler* GetResultHandler() const;
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protected:
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SocketMessageWatcher(int aFd, BluetoothSocketResultHandler* aRes);
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private:
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BluetoothStatus RecvMsg1();
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BluetoothStatus RecvMsg2();
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int16_t ReadInt16(unsigned long aOffset) const;
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int32_t ReadInt32(unsigned long aOffset) const;
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void ReadBdAddress(unsigned long aOffset, nsAString& aBdAddress) const;
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MessageLoopForIO::FileDescriptorWatcher mWatcher;
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int mFd;
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int mClientFd;
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unsigned char mLen;
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uint8_t mBuf[MSG1_SIZE + MSG2_SIZE];
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nsRefPtr<BluetoothSocketResultHandler> mRes;
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};
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/* |SocketMessageWatcherTask| starts a SocketMessageWatcher
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* on the I/O task
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*/
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class SocketMessageWatcherTask final : public Task
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{
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public:
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SocketMessageWatcherTask(SocketMessageWatcher* aWatcher);
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void Run() override;
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private:
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SocketMessageWatcher* mWatcher;
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};
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/* |DeleteSocketMessageWatcherTask| deletes a watching SocketMessageWatcher
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* on the I/O task
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*/
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class DeleteSocketMessageWatcherTask final : public Task
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{
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public:
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DeleteSocketMessageWatcherTask(BluetoothSocketResultHandler* aRes);
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void Run() override;
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private:
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BluetoothSocketResultHandler* mRes;
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};
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END_BLUETOOTH_NAMESPACE
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#endif // mozilla_dom_bluetooth_bluedroid_BluetoothSocketMessageWatcher_h
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