1/* 2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11#include "webrtc/base/proxyserver.h" 12 13#include <algorithm> 14#include "webrtc/base/socketfactory.h" 15 16namespace rtc { 17 18// ProxyServer 19ProxyServer::ProxyServer( 20 SocketFactory* int_factory, const SocketAddress& int_addr, 21 SocketFactory* ext_factory, const SocketAddress& ext_ip) 22 : ext_factory_(ext_factory), ext_ip_(ext_ip.ipaddr(), 0), // strip off port 23 server_socket_(int_factory->CreateAsyncSocket(int_addr.family(), 24 SOCK_STREAM)) { 25 ASSERT(server_socket_.get() != NULL); 26 ASSERT(int_addr.family() == AF_INET || int_addr.family() == AF_INET6); 27 server_socket_->Bind(int_addr); 28 server_socket_->Listen(5); 29 server_socket_->SignalReadEvent.connect(this, &ProxyServer::OnAcceptEvent); 30} 31 32ProxyServer::~ProxyServer() { 33 for (BindingList::iterator it = bindings_.begin(); 34 it != bindings_.end(); ++it) { 35 delete (*it); 36 } 37} 38 39void ProxyServer::OnAcceptEvent(AsyncSocket* socket) { 40 ASSERT(socket != NULL && socket == server_socket_.get()); 41 AsyncSocket* int_socket = socket->Accept(NULL); 42 AsyncProxyServerSocket* wrapped_socket = WrapSocket(int_socket); 43 AsyncSocket* ext_socket = ext_factory_->CreateAsyncSocket(ext_ip_.family(), 44 SOCK_STREAM); 45 if (ext_socket) { 46 ext_socket->Bind(ext_ip_); 47 bindings_.push_back(new ProxyBinding(wrapped_socket, ext_socket)); 48 } else { 49 LOG(LS_ERROR) << "Unable to create external socket on proxy accept event"; 50 } 51} 52 53void ProxyServer::OnBindingDestroyed(ProxyBinding* binding) { 54 BindingList::iterator it = 55 std::find(bindings_.begin(), bindings_.end(), binding); 56 delete (*it); 57 bindings_.erase(it); 58} 59 60// ProxyBinding 61ProxyBinding::ProxyBinding(AsyncProxyServerSocket* int_socket, 62 AsyncSocket* ext_socket) 63 : int_socket_(int_socket), ext_socket_(ext_socket), connected_(false), 64 out_buffer_(kBufferSize), in_buffer_(kBufferSize) { 65 int_socket_->SignalConnectRequest.connect(this, 66 &ProxyBinding::OnConnectRequest); 67 int_socket_->SignalReadEvent.connect(this, &ProxyBinding::OnInternalRead); 68 int_socket_->SignalWriteEvent.connect(this, &ProxyBinding::OnInternalWrite); 69 int_socket_->SignalCloseEvent.connect(this, &ProxyBinding::OnInternalClose); 70 ext_socket_->SignalConnectEvent.connect(this, 71 &ProxyBinding::OnExternalConnect); 72 ext_socket_->SignalReadEvent.connect(this, &ProxyBinding::OnExternalRead); 73 ext_socket_->SignalWriteEvent.connect(this, &ProxyBinding::OnExternalWrite); 74 ext_socket_->SignalCloseEvent.connect(this, &ProxyBinding::OnExternalClose); 75} 76 77void ProxyBinding::OnConnectRequest(AsyncProxyServerSocket* socket, 78 const SocketAddress& addr) { 79 ASSERT(!connected_ && ext_socket_.get() != NULL); 80 ext_socket_->Connect(addr); 81 // TODO: handle errors here 82} 83 84void ProxyBinding::OnInternalRead(AsyncSocket* socket) { 85 Read(int_socket_.get(), &out_buffer_); 86 Write(ext_socket_.get(), &out_buffer_); 87} 88 89void ProxyBinding::OnInternalWrite(AsyncSocket* socket) { 90 Write(int_socket_.get(), &in_buffer_); 91} 92 93void ProxyBinding::OnInternalClose(AsyncSocket* socket, int err) { 94 Destroy(); 95} 96 97void ProxyBinding::OnExternalConnect(AsyncSocket* socket) { 98 ASSERT(socket != NULL); 99 connected_ = true; 100 int_socket_->SendConnectResult(0, socket->GetRemoteAddress()); 101} 102 103void ProxyBinding::OnExternalRead(AsyncSocket* socket) { 104 Read(ext_socket_.get(), &in_buffer_); 105 Write(int_socket_.get(), &in_buffer_); 106} 107 108void ProxyBinding::OnExternalWrite(AsyncSocket* socket) { 109 Write(ext_socket_.get(), &out_buffer_); 110} 111 112void ProxyBinding::OnExternalClose(AsyncSocket* socket, int err) { 113 if (!connected_) { 114 int_socket_->SendConnectResult(err, SocketAddress()); 115 } 116 Destroy(); 117} 118 119void ProxyBinding::Read(AsyncSocket* socket, FifoBuffer* buffer) { 120 // Only read if the buffer is empty. 121 ASSERT(socket != NULL); 122 size_t size; 123 int read; 124 if (buffer->GetBuffered(&size) && size == 0) { 125 void* p = buffer->GetWriteBuffer(&size); 126 read = socket->Recv(p, size); 127 buffer->ConsumeWriteBuffer(_max(read, 0)); 128 } 129} 130 131void ProxyBinding::Write(AsyncSocket* socket, FifoBuffer* buffer) { 132 ASSERT(socket != NULL); 133 size_t size; 134 int written; 135 const void* p = buffer->GetReadData(&size); 136 written = socket->Send(p, size); 137 buffer->ConsumeReadData(_max(written, 0)); 138} 139 140void ProxyBinding::Destroy() { 141 SignalDestroyed(this); 142} 143 144} // namespace rtc 145