tdesktop/Telegram/SourceFiles/mtproto/connection_tcp.h

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/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
It is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#pragma once
#include "mtproto/core_types.h"
#include "mtproto/auth_key.h"
#include "mtproto/connection_abstract.h"
namespace MTP {
namespace internal {
class AbstractTCPConnection : public AbstractConnection {
Q_OBJECT
public:
AbstractTCPConnection(QThread *thread);
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virtual ~AbstractTCPConnection() = 0;
public slots:
void socketRead();
protected:
QTcpSocket sock;
uint32 packetNum; // sent packet number
uint32 packetRead, packetLeft; // reading from socket
bool readingToShort;
char *currentPos;
mtpBuffer longBuffer;
mtpPrime shortBuffer[MTPShortBufferSize];
virtual void socketPacket(const char *packet, uint32 length) = 0;
static mtpBuffer handleResponse(const char *packet, uint32 length);
static void handleError(QAbstractSocket::SocketError e, QTcpSocket &sock);
static uint32 fourCharsToUInt(char ch1, char ch2, char ch3, char ch4) {
char ch[4] = { ch1, ch2, ch3, ch4 };
return *reinterpret_cast<uint32*>(ch);
}
void tcpSend(mtpBuffer &buffer);
uchar _sendKey[CTRState::KeySize];
CTRState _sendState;
uchar _receiveKey[CTRState::KeySize];
CTRState _receiveState;
};
class TCPConnection : public AbstractTCPConnection {
Q_OBJECT
public:
TCPConnection(QThread *thread);
void sendData(mtpBuffer &buffer) override;
void disconnectFromServer() override;
void connectTcp(const DcOptions::Endpoint &endpoint) override;
void connectHttp(const DcOptions::Endpoint &endpoint) override { // not supported
}
bool isConnected() const override;
int32 debugState() const override;
QString transport() const override;
public slots:
void socketError(QAbstractSocket::SocketError e);
void onSocketConnected();
void onSocketDisconnected();
void onTcpTimeoutTimer();
protected:
void socketPacket(const char *packet, uint32 length) override;
private:
enum Status {
WaitingTcp = 0,
UsingTcp,
FinishedWork
};
Status status;
MTPint128 tcpNonce;
QString _addr;
int32 _port, _tcpTimeout;
MTPDdcOption::Flags _flags;
QTimer tcpTimeoutTimer;
};
} // namespace internal
} // namespace MTP