зеркало из https://github.com/mozilla/gecko-dev.git
93 строки
2.3 KiB
C++
93 строки
2.3 KiB
C++
/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
|
|
/* vim: set ts=2 et sw=2 tw=80: */
|
|
/* 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/. */
|
|
|
|
#ifndef mozilla_ipc_DaemonSocketPDU_h
|
|
#define mozilla_ipc_DaemonSocketPDU_h
|
|
|
|
#include "mozilla/FileUtils.h"
|
|
#include "mozilla/ipc/SocketBase.h"
|
|
#include "mozilla/ipc/DaemonSocketMessageHandlers.h"
|
|
|
|
namespace mozilla {
|
|
namespace ipc {
|
|
|
|
class DaemonSocketIOConsumer;
|
|
|
|
/**
|
|
* |DaemonSocketPDU| represents a single PDU that is transfered from or to
|
|
* the HAL daemon. Each PDU contains exactly one command.
|
|
*
|
|
* A PDU as the following format
|
|
*
|
|
* | 1 | 1 | 2 | n |
|
|
* | service | opcode | payload length | payload |
|
|
*
|
|
* Service and Opcode each require 1 byte, the payload length requires 2
|
|
* bytes, and the payload requires the number of bytes as stored in the
|
|
* payload-length field.
|
|
*
|
|
* Each service and opcode can have a different payload with individual
|
|
* length. For the exact details of the HAL protocol, please refer to
|
|
*
|
|
* https://git.kernel.org/cgit/bluetooth/bluez.git/tree/android/hal-ipc-api.txt?id=5.24
|
|
*
|
|
*/
|
|
class DaemonSocketPDU final : public UnixSocketIOBuffer
|
|
{
|
|
public:
|
|
enum {
|
|
OFF_SERVICE = 0,
|
|
OFF_OPCODE = 1,
|
|
OFF_LENGTH = 2,
|
|
OFF_PAYLOAD = 4,
|
|
HEADER_SIZE = OFF_PAYLOAD,
|
|
MAX_PAYLOAD_LENGTH = 1 << 16
|
|
};
|
|
|
|
DaemonSocketPDU(uint8_t aService, uint8_t aOpcode, uint16_t aPayloadSize);
|
|
DaemonSocketPDU(size_t aPayloadSize);
|
|
~DaemonSocketPDU();
|
|
|
|
void SetConsumer(DaemonSocketIOConsumer* aConsumer)
|
|
{
|
|
mConsumer = aConsumer;
|
|
}
|
|
|
|
void SetResultHandler(DaemonSocketResultHandler* aRes)
|
|
{
|
|
mRes = aRes;
|
|
}
|
|
|
|
DaemonSocketResultHandler* GetResultHandler() const
|
|
{
|
|
return mRes;
|
|
}
|
|
|
|
void GetHeader(uint8_t& aService, uint8_t& aOpcode,
|
|
uint16_t& aPayloadSize);
|
|
|
|
ssize_t Send(int aFd) override;
|
|
ssize_t Receive(int aFd) override;
|
|
|
|
int AcquireFd();
|
|
|
|
nsresult UpdateHeader();
|
|
|
|
private:
|
|
size_t GetPayloadSize() const;
|
|
void OnError(const char* aFunction, int aErrno);
|
|
|
|
DaemonSocketIOConsumer* mConsumer;
|
|
RefPtr<DaemonSocketResultHandler> mRes;
|
|
ScopedClose mReceivedFd;
|
|
};
|
|
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|