henrike@webrtc.org | f048872 | 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 | |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 11 | #include "rtc_base/proxyserver.h" |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 12 | |
| 13 | #include <algorithm> |
nisse | ede5da4 | 2017-01-12 05:15:36 -0800 | [diff] [blame] | 14 | |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 15 | #include "rtc_base/checks.h" |
| 16 | #include "rtc_base/socketfactory.h" |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 17 | |
| 18 | namespace rtc { |
| 19 | |
| 20 | // ProxyServer |
| 21 | ProxyServer::ProxyServer( |
| 22 | SocketFactory* int_factory, const SocketAddress& int_addr, |
| 23 | SocketFactory* ext_factory, const SocketAddress& ext_ip) |
| 24 | : ext_factory_(ext_factory), ext_ip_(ext_ip.ipaddr(), 0), // strip off port |
| 25 | server_socket_(int_factory->CreateAsyncSocket(int_addr.family(), |
| 26 | SOCK_STREAM)) { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 27 | RTC_DCHECK(server_socket_.get() != nullptr); |
nisse | ede5da4 | 2017-01-12 05:15:36 -0800 | [diff] [blame] | 28 | RTC_DCHECK(int_addr.family() == AF_INET || int_addr.family() == AF_INET6); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 29 | server_socket_->Bind(int_addr); |
| 30 | server_socket_->Listen(5); |
| 31 | server_socket_->SignalReadEvent.connect(this, &ProxyServer::OnAcceptEvent); |
| 32 | } |
| 33 | |
| 34 | ProxyServer::~ProxyServer() { |
| 35 | for (BindingList::iterator it = bindings_.begin(); |
| 36 | it != bindings_.end(); ++it) { |
| 37 | delete (*it); |
| 38 | } |
| 39 | } |
| 40 | |
deadbeef | c5d0d95 | 2015-07-16 10:22:21 -0700 | [diff] [blame] | 41 | SocketAddress ProxyServer::GetServerAddress() { |
| 42 | return server_socket_->GetLocalAddress(); |
| 43 | } |
| 44 | |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 45 | void ProxyServer::OnAcceptEvent(AsyncSocket* socket) { |
kwiberg | ee89e78 | 2017-08-09 17:22:01 -0700 | [diff] [blame] | 46 | RTC_DCHECK(socket); |
| 47 | RTC_DCHECK_EQ(socket, server_socket_.get()); |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 48 | AsyncSocket* int_socket = socket->Accept(nullptr); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 49 | AsyncProxyServerSocket* wrapped_socket = WrapSocket(int_socket); |
| 50 | AsyncSocket* ext_socket = ext_factory_->CreateAsyncSocket(ext_ip_.family(), |
| 51 | SOCK_STREAM); |
| 52 | if (ext_socket) { |
| 53 | ext_socket->Bind(ext_ip_); |
| 54 | bindings_.push_back(new ProxyBinding(wrapped_socket, ext_socket)); |
| 55 | } else { |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 56 | RTC_LOG(LS_ERROR) |
| 57 | << "Unable to create external socket on proxy accept event"; |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 58 | } |
| 59 | } |
| 60 | |
| 61 | void ProxyServer::OnBindingDestroyed(ProxyBinding* binding) { |
| 62 | BindingList::iterator it = |
| 63 | std::find(bindings_.begin(), bindings_.end(), binding); |
| 64 | delete (*it); |
| 65 | bindings_.erase(it); |
| 66 | } |
| 67 | |
| 68 | // ProxyBinding |
| 69 | ProxyBinding::ProxyBinding(AsyncProxyServerSocket* int_socket, |
| 70 | AsyncSocket* ext_socket) |
| 71 | : int_socket_(int_socket), ext_socket_(ext_socket), connected_(false), |
| 72 | out_buffer_(kBufferSize), in_buffer_(kBufferSize) { |
| 73 | int_socket_->SignalConnectRequest.connect(this, |
| 74 | &ProxyBinding::OnConnectRequest); |
| 75 | int_socket_->SignalReadEvent.connect(this, &ProxyBinding::OnInternalRead); |
| 76 | int_socket_->SignalWriteEvent.connect(this, &ProxyBinding::OnInternalWrite); |
| 77 | int_socket_->SignalCloseEvent.connect(this, &ProxyBinding::OnInternalClose); |
| 78 | ext_socket_->SignalConnectEvent.connect(this, |
| 79 | &ProxyBinding::OnExternalConnect); |
| 80 | ext_socket_->SignalReadEvent.connect(this, &ProxyBinding::OnExternalRead); |
| 81 | ext_socket_->SignalWriteEvent.connect(this, &ProxyBinding::OnExternalWrite); |
| 82 | ext_socket_->SignalCloseEvent.connect(this, &ProxyBinding::OnExternalClose); |
| 83 | } |
| 84 | |
kwiberg@webrtc.org | 67186fe | 2015-03-09 22:21:53 +0000 | [diff] [blame] | 85 | ProxyBinding::~ProxyBinding() = default; |
| 86 | |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 87 | void ProxyBinding::OnConnectRequest(AsyncProxyServerSocket* socket, |
| 88 | const SocketAddress& addr) { |
kwiberg | ee89e78 | 2017-08-09 17:22:01 -0700 | [diff] [blame] | 89 | RTC_DCHECK(!connected_); |
| 90 | RTC_DCHECK(ext_socket_); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 91 | ext_socket_->Connect(addr); |
| 92 | // TODO: handle errors here |
| 93 | } |
| 94 | |
| 95 | void ProxyBinding::OnInternalRead(AsyncSocket* socket) { |
| 96 | Read(int_socket_.get(), &out_buffer_); |
| 97 | Write(ext_socket_.get(), &out_buffer_); |
| 98 | } |
| 99 | |
| 100 | void ProxyBinding::OnInternalWrite(AsyncSocket* socket) { |
| 101 | Write(int_socket_.get(), &in_buffer_); |
| 102 | } |
| 103 | |
| 104 | void ProxyBinding::OnInternalClose(AsyncSocket* socket, int err) { |
| 105 | Destroy(); |
| 106 | } |
| 107 | |
| 108 | void ProxyBinding::OnExternalConnect(AsyncSocket* socket) { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 109 | RTC_DCHECK(socket != nullptr); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 110 | connected_ = true; |
| 111 | int_socket_->SendConnectResult(0, socket->GetRemoteAddress()); |
| 112 | } |
| 113 | |
| 114 | void ProxyBinding::OnExternalRead(AsyncSocket* socket) { |
| 115 | Read(ext_socket_.get(), &in_buffer_); |
| 116 | Write(int_socket_.get(), &in_buffer_); |
| 117 | } |
| 118 | |
| 119 | void ProxyBinding::OnExternalWrite(AsyncSocket* socket) { |
| 120 | Write(ext_socket_.get(), &out_buffer_); |
| 121 | } |
| 122 | |
| 123 | void ProxyBinding::OnExternalClose(AsyncSocket* socket, int err) { |
| 124 | if (!connected_) { |
| 125 | int_socket_->SendConnectResult(err, SocketAddress()); |
| 126 | } |
| 127 | Destroy(); |
| 128 | } |
| 129 | |
| 130 | void ProxyBinding::Read(AsyncSocket* socket, FifoBuffer* buffer) { |
| 131 | // Only read if the buffer is empty. |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 132 | RTC_DCHECK(socket != nullptr); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 133 | size_t size; |
| 134 | int read; |
| 135 | if (buffer->GetBuffered(&size) && size == 0) { |
| 136 | void* p = buffer->GetWriteBuffer(&size); |
Stefan Holmer | 9131efd | 2016-05-23 18:19:26 +0200 | [diff] [blame] | 137 | read = socket->Recv(p, size, nullptr); |
andresp@webrtc.org | ff689be | 2015-02-12 11:54:26 +0000 | [diff] [blame] | 138 | buffer->ConsumeWriteBuffer(std::max(read, 0)); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 139 | } |
| 140 | } |
| 141 | |
| 142 | void ProxyBinding::Write(AsyncSocket* socket, FifoBuffer* buffer) { |
deadbeef | 37f5ecf | 2017-02-27 14:06:41 -0800 | [diff] [blame] | 143 | RTC_DCHECK(socket != nullptr); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 144 | size_t size; |
| 145 | int written; |
| 146 | const void* p = buffer->GetReadData(&size); |
| 147 | written = socket->Send(p, size); |
andresp@webrtc.org | ff689be | 2015-02-12 11:54:26 +0000 | [diff] [blame] | 148 | buffer->ConsumeReadData(std::max(written, 0)); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 149 | } |
| 150 | |
| 151 | void ProxyBinding::Destroy() { |
| 152 | SignalDestroyed(this); |
| 153 | } |
| 154 | |
deadbeef | f137e97 | 2017-03-23 15:45:49 -0700 | [diff] [blame] | 155 | AsyncProxyServerSocket* SocksProxyServer::WrapSocket(AsyncSocket* socket) { |
| 156 | return new AsyncSocksProxyServerSocket(socket); |
| 157 | } |
| 158 | |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 +0000 | [diff] [blame] | 159 | } // namespace rtc |