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/*
* libjingle
* Copyright 2004--2010, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TALK_BASE_ASYNCTCPSOCKET_H_
#define TALK_BASE_ASYNCTCPSOCKET_H_
#include "talk/base/asyncpacketsocket.h"
#include "talk/base/scoped_ptr.h"
#include "talk/base/socketfactory.h"
namespace talk_base {
// Simulates UDP semantics over TCP. Send and Recv packet sizes
// are preserved, and drops packets silently on Send, rather than
// buffer them in user space.
class AsyncTCPSocketBase : public AsyncPacketSocket {
public:
AsyncTCPSocketBase(AsyncSocket* socket, bool listen, size_t max_packet_size);
virtual ~AsyncTCPSocketBase();
// Pure virtual methods to send and recv data.
virtual int Send(const void *pv, size_t cb,
const talk_base::PacketOptions& options) = 0;
virtual void ProcessInput(char* data, size_t* len) = 0;
// Signals incoming connection.
virtual void HandleIncomingConnection(AsyncSocket* socket) = 0;
virtual SocketAddress GetLocalAddress() const;
virtual SocketAddress GetRemoteAddress() const;
virtual int SendTo(const void *pv, size_t cb, const SocketAddress& addr,
const talk_base::PacketOptions& options);
virtual int Close();
virtual State GetState() const;
virtual int GetOption(Socket::Option opt, int* value);
virtual int SetOption(Socket::Option opt, int value);
virtual int GetError() const;
virtual void SetError(int error);
protected:
// Binds and connects |socket| and creates AsyncTCPSocket for
// it. Takes ownership of |socket|. Returns NULL if bind() or
// connect() fail (|socket| is destroyed in that case).
static AsyncSocket* ConnectSocket(AsyncSocket* socket,
const SocketAddress& bind_address,
const SocketAddress& remote_address);
virtual int SendRaw(const void* pv, size_t cb);
int FlushOutBuffer();
// Add data to |outbuf_|.
void AppendToOutBuffer(const void* pv, size_t cb);
// Helper methods for |outpos_|.
bool IsOutBufferEmpty() const { return outpos_ == 0; }
void ClearOutBuffer() { outpos_ = 0; }
private:
// Called by the underlying socket
void OnConnectEvent(AsyncSocket* socket);
void OnReadEvent(AsyncSocket* socket);
void OnWriteEvent(AsyncSocket* socket);
void OnCloseEvent(AsyncSocket* socket, int error);
scoped_ptr<AsyncSocket> socket_;
bool listen_;
char* inbuf_, * outbuf_;
size_t insize_, inpos_, outsize_, outpos_;
DISALLOW_EVIL_CONSTRUCTORS(AsyncTCPSocketBase);
};
class AsyncTCPSocket : public AsyncTCPSocketBase {
public:
// Binds and connects |socket| and creates AsyncTCPSocket for
// it. Takes ownership of |socket|. Returns NULL if bind() or
// connect() fail (|socket| is destroyed in that case).
static AsyncTCPSocket* Create(AsyncSocket* socket,
const SocketAddress& bind_address,
const SocketAddress& remote_address);
AsyncTCPSocket(AsyncSocket* socket, bool listen);
virtual ~AsyncTCPSocket() {}
virtual int Send(const void* pv, size_t cb,
const talk_base::PacketOptions& options);
virtual void ProcessInput(char* data, size_t* len);
virtual void HandleIncomingConnection(AsyncSocket* socket);
private:
DISALLOW_EVIL_CONSTRUCTORS(AsyncTCPSocket);
};
} // namespace talk_base
#endif // TALK_BASE_ASYNCTCPSOCKET_H_
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