henrike@webrtc.org | f7795df | 2014-05-13 18:00:26 +0000 | [diff] [blame^] | 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 | |
| 16 | namespace rtc { |
| 17 | |
| 18 | // ProxyServer |
| 19 | ProxyServer::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 | |
| 32 | ProxyServer::~ProxyServer() { |
| 33 | for (BindingList::iterator it = bindings_.begin(); |
| 34 | it != bindings_.end(); ++it) { |
| 35 | delete (*it); |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | void 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 | |
| 53 | void 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 |
| 61 | ProxyBinding::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 | |
| 77 | void 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 | |
| 84 | void ProxyBinding::OnInternalRead(AsyncSocket* socket) { |
| 85 | Read(int_socket_.get(), &out_buffer_); |
| 86 | Write(ext_socket_.get(), &out_buffer_); |
| 87 | } |
| 88 | |
| 89 | void ProxyBinding::OnInternalWrite(AsyncSocket* socket) { |
| 90 | Write(int_socket_.get(), &in_buffer_); |
| 91 | } |
| 92 | |
| 93 | void ProxyBinding::OnInternalClose(AsyncSocket* socket, int err) { |
| 94 | Destroy(); |
| 95 | } |
| 96 | |
| 97 | void ProxyBinding::OnExternalConnect(AsyncSocket* socket) { |
| 98 | ASSERT(socket != NULL); |
| 99 | connected_ = true; |
| 100 | int_socket_->SendConnectResult(0, socket->GetRemoteAddress()); |
| 101 | } |
| 102 | |
| 103 | void ProxyBinding::OnExternalRead(AsyncSocket* socket) { |
| 104 | Read(ext_socket_.get(), &in_buffer_); |
| 105 | Write(int_socket_.get(), &in_buffer_); |
| 106 | } |
| 107 | |
| 108 | void ProxyBinding::OnExternalWrite(AsyncSocket* socket) { |
| 109 | Write(ext_socket_.get(), &out_buffer_); |
| 110 | } |
| 111 | |
| 112 | void ProxyBinding::OnExternalClose(AsyncSocket* socket, int err) { |
| 113 | if (!connected_) { |
| 114 | int_socket_->SendConnectResult(err, SocketAddress()); |
| 115 | } |
| 116 | Destroy(); |
| 117 | } |
| 118 | |
| 119 | void 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 | |
| 131 | void 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 | |
| 140 | void ProxyBinding::Destroy() { |
| 141 | SignalDestroyed(this); |
| 142 | } |
| 143 | |
| 144 | } // namespace rtc |