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123 lines
4 KiB
C++
123 lines
4 KiB
C++
/*
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* Copyright 2004 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef RTC_BASE_ASYNC_TCP_SOCKET_H_
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#define RTC_BASE_ASYNC_TCP_SOCKET_H_
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#include <stddef.h>
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#include <memory>
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#include "rtc_base/async_packet_socket.h"
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#include "rtc_base/buffer.h"
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#include "rtc_base/socket.h"
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#include "rtc_base/socket_address.h"
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namespace rtc {
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// Simulates UDP semantics over TCP. Send and Recv packet sizes
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// are preserved, and drops packets silently on Send, rather than
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// buffer them in user space.
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class AsyncTCPSocketBase : public AsyncPacketSocket {
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public:
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AsyncTCPSocketBase(Socket* socket, size_t max_packet_size);
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~AsyncTCPSocketBase() override;
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AsyncTCPSocketBase(const AsyncTCPSocketBase&) = delete;
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AsyncTCPSocketBase& operator=(const AsyncTCPSocketBase&) = delete;
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// Pure virtual methods to send and recv data.
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int Send(const void* pv,
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size_t cb,
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const rtc::PacketOptions& options) override = 0;
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virtual void ProcessInput(char* data, size_t* len) = 0;
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SocketAddress GetLocalAddress() const override;
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SocketAddress GetRemoteAddress() const override;
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int SendTo(const void* pv,
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size_t cb,
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const SocketAddress& addr,
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const rtc::PacketOptions& options) override;
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int Close() override;
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State GetState() const override;
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int GetOption(Socket::Option opt, int* value) override;
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int SetOption(Socket::Option opt, int value) override;
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int GetError() const override;
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void SetError(int error) override;
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protected:
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// Binds and connects `socket` and creates AsyncTCPSocket for
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// it. Takes ownership of `socket`. Returns null if bind() or
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// connect() fail (`socket` is destroyed in that case).
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static Socket* ConnectSocket(Socket* socket,
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const SocketAddress& bind_address,
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const SocketAddress& remote_address);
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int FlushOutBuffer();
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// Add data to `outbuf_`.
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void AppendToOutBuffer(const void* pv, size_t cb);
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// Helper methods for `outpos_`.
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bool IsOutBufferEmpty() const { return outbuf_.size() == 0; }
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void ClearOutBuffer() { outbuf_.Clear(); }
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private:
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// Called by the underlying socket
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void OnConnectEvent(Socket* socket);
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void OnReadEvent(Socket* socket);
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void OnWriteEvent(Socket* socket);
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void OnCloseEvent(Socket* socket, int error);
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std::unique_ptr<Socket> socket_;
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Buffer inbuf_;
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Buffer outbuf_;
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size_t max_insize_;
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size_t max_outsize_;
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};
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class AsyncTCPSocket : public AsyncTCPSocketBase {
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public:
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// Binds and connects `socket` and creates AsyncTCPSocket for
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// it. Takes ownership of `socket`. Returns null if bind() or
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// connect() fail (`socket` is destroyed in that case).
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static AsyncTCPSocket* Create(Socket* socket,
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const SocketAddress& bind_address,
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const SocketAddress& remote_address);
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explicit AsyncTCPSocket(Socket* socket);
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~AsyncTCPSocket() override {}
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AsyncTCPSocket(const AsyncTCPSocket&) = delete;
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AsyncTCPSocket& operator=(const AsyncTCPSocket&) = delete;
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int Send(const void* pv,
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size_t cb,
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const rtc::PacketOptions& options) override;
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void ProcessInput(char* data, size_t* len) override;
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};
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class AsyncTcpListenSocket : public AsyncListenSocket {
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public:
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explicit AsyncTcpListenSocket(std::unique_ptr<Socket> socket);
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State GetState() const override;
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SocketAddress GetLocalAddress() const override;
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virtual void HandleIncomingConnection(rtc::Socket* socket);
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private:
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// Called by the underlying socket
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void OnReadEvent(Socket* socket);
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std::unique_ptr<Socket> socket_;
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};
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} // namespace rtc
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#endif // RTC_BASE_ASYNC_TCP_SOCKET_H_
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