tdesktop/Telegram/SourceFiles/mtproto/connection_abstract.h

92 lines
2.7 KiB
C++

/*
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/dc_options.h"
namespace MTP {
namespace internal {
class AbstractConnection : public QObject {
Q_OBJECT
public:
AbstractConnection(QThread *thread) : _sentEncrypted(false) {
moveToThread(thread);
}
AbstractConnection(const AbstractConnection &other) = delete;
AbstractConnection &operator=(const AbstractConnection &other) = delete;
virtual ~AbstractConnection() = 0;
// virtual constructor
static AbstractConnection *create(DcType type, QThread *thread);
void setSentEncrypted() {
_sentEncrypted = true;
}
virtual void sendData(mtpBuffer &buffer) = 0; // has size + 3, buffer[0] = len, buffer[1] = packetnum, buffer[last] = crc32
virtual void disconnectFromServer() = 0;
virtual void connectTcp(const DcOptions::Endpoint &endpoint) = 0;
virtual void connectHttp(const DcOptions::Endpoint &endpoint) = 0;
virtual bool isConnected() const = 0;
virtual bool usingHttpWait() {
return false;
}
virtual bool needHttpWait() {
return false;
}
virtual int32 debugState() const = 0;
virtual QString transport() const = 0;
using BuffersQueue = std::deque<mtpBuffer>;
BuffersQueue &received() {
return _receivedQueue;
}
// Used to emit error(...) with no real code from the server.
static constexpr auto kErrorCodeOther = -499;
signals:
void receivedData();
void receivedSome(); // to stop restart timer
void error(qint32 errorCodebool);
void connected();
void disconnected();
protected:
BuffersQueue _receivedQueue; // list of received packets, not processed yet
bool _sentEncrypted;
// first we always send fake MTPReq_pq to see if connection works at all
// we send them simultaneously through TCP/HTTP/IPv4/IPv6 to choose the working one
static mtpBuffer preparePQFake(const MTPint128 &nonce);
static MTPResPQ readPQFakeReply(const mtpBuffer &buffer);
};
} // namespace internal
} // namespace MTP