tdlight/td/mtproto/RawConnection.h

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//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2023
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
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#include "td/mtproto/ConnectionManager.h"
#include "td/mtproto/PacketInfo.h"
#include "td/mtproto/TransportType.h"
#include "td/utils/buffer.h"
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#include "td/utils/BufferedFd.h"
#include "td/utils/common.h"
#include "td/utils/port/detail/PollableFd.h"
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#include "td/utils/port/IPAddress.h"
#include "td/utils/port/SocketFd.h"
#include "td/utils/Status.h"
#include "td/utils/StorerBase.h"
namespace td {
namespace mtproto {
class AuthKey;
class RawConnection {
public:
class StatsCallback {
public:
virtual ~StatsCallback() = default;
virtual void on_read(uint64 bytes) = 0;
virtual void on_write(uint64 bytes) = 0;
virtual void on_pong() = 0; // called when we know that connection is alive
virtual void on_error() = 0; // called on RawConnection error. Such error should be very rare on good connections.
virtual void on_mtproto_error() = 0;
};
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RawConnection() = default;
RawConnection(const RawConnection &) = delete;
RawConnection &operator=(const RawConnection &) = delete;
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virtual ~RawConnection() = default;
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static unique_ptr<RawConnection> create(IPAddress ip_address, BufferedFd<SocketFd> buffered_socket_fd,
TransportType transport_type, unique_ptr<StatsCallback> stats_callback);
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virtual void set_connection_token(ConnectionManager::ConnectionToken connection_token) = 0;
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virtual bool can_send() const = 0;
virtual TransportType get_transport_type() const = 0;
virtual size_t send_crypto(const Storer &storer, int64 session_id, int64 salt, const AuthKey &auth_key,
uint64 quick_ack_token) = 0;
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virtual uint64 send_no_crypto(const Storer &storer) = 0;
virtual PollableFdInfo &get_poll_info() = 0;
virtual StatsCallback *stats_callback() = 0;
class Callback {
public:
Callback() = default;
Callback(const Callback &) = delete;
Callback &operator=(const Callback &) = delete;
virtual ~Callback() = default;
virtual Status on_raw_packet(const PacketInfo &info, BufferSlice packet) = 0;
virtual Status on_quick_ack(uint64 quick_ack_token) {
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return Status::Error("Quick acknowledgements are unsupported by the callback");
}
virtual Status before_write() {
return Status::OK();
}
virtual void on_read(size_t size) {
}
};
// NB: After first returned error, all subsequent calls will return error too.
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virtual Status flush(const AuthKey &auth_key, Callback &callback) TD_WARN_UNUSED_RESULT = 0;
virtual bool has_error() const = 0;
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virtual void close() = 0;
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struct PublicFields {
uint32 extra{0};
string debug_str;
double rtt{0};
};
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virtual PublicFields &extra() = 0;
virtual const PublicFields &extra() const = 0;
};
} // namespace mtproto
} // namespace td