1/*
2 * libjingle
3 * Copyright 2010, Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 *  1. Redistributions of source code must retain the above copyright notice,
9 *     this list of conditions and the following disclaimer.
10 *  2. Redistributions in binary form must reproduce the above copyright notice,
11 *     this list of conditions and the following disclaimer in the documentation
12 *     and/or other materials provided with the distribution.
13 *  3. The name of the author may not be used to endorse or promote products
14 *     derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include "talk/base/socketstream.h"
29
30namespace talk_base {
31
32SocketStream::SocketStream(AsyncSocket* socket) : socket_(NULL) {
33  Attach(socket);
34}
35
36SocketStream::~SocketStream() {
37  delete socket_;
38}
39
40void SocketStream::Attach(AsyncSocket* socket) {
41  if (socket_)
42    delete socket_;
43  socket_ = socket;
44  if (socket_) {
45    socket_->SignalConnectEvent.connect(this, &SocketStream::OnConnectEvent);
46    socket_->SignalReadEvent.connect(this,    &SocketStream::OnReadEvent);
47    socket_->SignalWriteEvent.connect(this,   &SocketStream::OnWriteEvent);
48    socket_->SignalCloseEvent.connect(this,   &SocketStream::OnCloseEvent);
49  }
50}
51
52AsyncSocket* SocketStream::Detach() {
53  AsyncSocket* socket = socket_;
54  if (socket_) {
55    socket_->SignalConnectEvent.disconnect(this);
56    socket_->SignalReadEvent.disconnect(this);
57    socket_->SignalWriteEvent.disconnect(this);
58    socket_->SignalCloseEvent.disconnect(this);
59    socket_ = NULL;
60  }
61  return socket;
62}
63
64StreamState SocketStream::GetState() const {
65  ASSERT(socket_ != NULL);
66  switch (socket_->GetState()) {
67    case Socket::CS_CONNECTED:
68      return SS_OPEN;
69    case Socket::CS_CONNECTING:
70      return SS_OPENING;
71    case Socket::CS_CLOSED:
72    default:
73      return SS_CLOSED;
74  }
75}
76
77StreamResult SocketStream::Read(void* buffer, size_t buffer_len,
78                                size_t* read, int* error) {
79  ASSERT(socket_ != NULL);
80  int result = socket_->Recv(buffer, buffer_len);
81  if (result < 0) {
82    if (socket_->IsBlocking())
83      return SR_BLOCK;
84    if (error)
85      *error = socket_->GetError();
86    return SR_ERROR;
87  }
88  if ((result > 0) || (buffer_len == 0)) {
89    if (read)
90      *read = result;
91    return SR_SUCCESS;
92  }
93  return SR_EOS;
94}
95
96StreamResult SocketStream::Write(const void* data, size_t data_len,
97                                 size_t* written, int* error) {
98  ASSERT(socket_ != NULL);
99  int result = socket_->Send(data, data_len);
100  if (result < 0) {
101    if (socket_->IsBlocking())
102      return SR_BLOCK;
103    if (error)
104      *error = socket_->GetError();
105    return SR_ERROR;
106  }
107  if (written)
108    *written = result;
109  return SR_SUCCESS;
110}
111
112void SocketStream::Close() {
113  ASSERT(socket_ != NULL);
114  socket_->Close();
115}
116
117void SocketStream::OnConnectEvent(AsyncSocket* socket) {
118  ASSERT(socket == socket_);
119  SignalEvent(this, SE_OPEN | SE_READ | SE_WRITE, 0);
120}
121
122void SocketStream::OnReadEvent(AsyncSocket* socket) {
123  ASSERT(socket == socket_);
124  SignalEvent(this, SE_READ, 0);
125}
126
127void SocketStream::OnWriteEvent(AsyncSocket* socket) {
128  ASSERT(socket == socket_);
129  SignalEvent(this, SE_WRITE, 0);
130}
131
132void SocketStream::OnCloseEvent(AsyncSocket* socket, int err) {
133  ASSERT(socket == socket_);
134  SignalEvent(this, SE_CLOSE, err);
135}
136
137
138}  // namespace talk_base
139