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/*
* libjingle
* Copyright 2005, 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_SOCKET_STREAM_H__
#define TALK_BASE_SOCKET_STREAM_H__
#include "talk/base/asyncsocket.h"
#include "talk/base/common.h"
#include "talk/base/stream.h"
namespace talk_base {
///////////////////////////////////////////////////////////////////////////////
class SocketStream : public StreamInterface, public sigslot::has_slots<> {
public:
SocketStream(AsyncSocket* socket) : socket_(NULL) {
Attach(socket);
}
virtual ~SocketStream() { delete socket_; }
void Attach(AsyncSocket* socket) {
if (socket_)
delete socket_;
socket_ = socket;
if (socket_) {
socket_->SignalConnectEvent.connect(this, &SocketStream::OnConnectEvent);
socket_->SignalReadEvent.connect(this, &SocketStream::OnReadEvent);
socket_->SignalWriteEvent.connect(this, &SocketStream::OnWriteEvent);
socket_->SignalCloseEvent.connect(this, &SocketStream::OnCloseEvent);
}
}
AsyncSocket* Detach() {
AsyncSocket* socket = socket_;
if (socket_) {
socket_->SignalConnectEvent.disconnect(this);
socket_->SignalReadEvent.disconnect(this);
socket_->SignalWriteEvent.disconnect(this);
socket_->SignalCloseEvent.disconnect(this);
socket_ = NULL;
}
return socket;
}
AsyncSocket* GetSocket() { return socket_; }
virtual StreamState GetState() const {
ASSERT(socket_ != NULL);
switch (socket_->GetState()) {
case Socket::CS_CONNECTED:
return SS_OPEN;
case Socket::CS_CONNECTING:
return SS_OPENING;
case Socket::CS_CLOSED:
default:
return SS_CLOSED;
}
}
virtual StreamResult Read(void* buffer, size_t buffer_len,
size_t* read, int* error) {
ASSERT(socket_ != NULL);
int result = socket_->Recv(buffer, buffer_len);
if (result < 0) {
if (socket_->IsBlocking())
return SR_BLOCK;
if (error)
*error = socket_->GetError();
return SR_ERROR;
}
if ((result > 0) || (buffer_len == 0)) {
if (read)
*read = result;
return SR_SUCCESS;
}
return SR_EOS;
}
virtual StreamResult Write(const void* data, size_t data_len,
size_t* written, int* error) {
ASSERT(socket_ != NULL);
int result = socket_->Send(data, data_len);
if (result < 0) {
if (socket_->IsBlocking())
return SR_BLOCK;
if (error)
*error = socket_->GetError();
return SR_ERROR;
}
if (written)
*written = result;
return SR_SUCCESS;
}
virtual void Close() { ASSERT(socket_ != NULL); socket_->Close(); }
private:
void OnConnectEvent(AsyncSocket* socket) {
ASSERT(socket == socket_);
SignalEvent(this, SE_OPEN | SE_READ | SE_WRITE, 0);
}
void OnReadEvent(AsyncSocket* socket) {
ASSERT(socket == socket_);
SignalEvent(this, SE_READ, 0);
}
void OnWriteEvent(AsyncSocket* socket) {
ASSERT(socket == socket_);
SignalEvent(this, SE_WRITE, 0);
}
void OnCloseEvent(AsyncSocket* socket, int err) {
ASSERT(socket == socket_);
SignalEvent(this, SE_CLOSE, err);
}
AsyncSocket* socket_;
DISALLOW_EVIL_CONSTRUCTORS(SocketStream);
};
///////////////////////////////////////////////////////////////////////////////
} // namespace talk_base
#endif // TALK_BASE_SOCKET_STREAM_H__
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