henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [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 | |
Steve Anton | 10542f2 | 2019-01-11 17:11:00 | [diff] [blame] | 11 | #include "rtc_base/proxy_server.h" |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 12 | |
Yves Gerey | 3e70781 | 2018-11-28 15:47:49 | [diff] [blame] | 13 | #include <stddef.h> |
nisse | ede5da4 | 2017-01-12 13:15:36 | [diff] [blame] | 14 | |
Niels Möller | d970967 | 2019-03-25 07:57:50 | [diff] [blame] | 15 | #include "absl/memory/memory.h" |
Mirko Bonadei | 92ea95e | 2017-09-15 04:47:31 | [diff] [blame] | 16 | #include "rtc_base/checks.h" |
Yves Gerey | 2e00abc | 2018-10-05 13:39:24 | [diff] [blame] | 17 | #include "rtc_base/logging.h" |
Steve Anton | 10542f2 | 2019-01-11 17:11:00 | [diff] [blame] | 18 | #include "rtc_base/socket_factory.h" |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 19 | |
| 20 | namespace rtc { |
| 21 | |
| 22 | // ProxyServer |
Yves Gerey | 665174f | 2018-06-19 13:03:05 | [diff] [blame] | 23 | ProxyServer::ProxyServer(SocketFactory* int_factory, |
| 24 | const SocketAddress& int_addr, |
| 25 | SocketFactory* ext_factory, |
| 26 | const SocketAddress& ext_ip) |
| 27 | : ext_factory_(ext_factory), |
| 28 | ext_ip_(ext_ip.ipaddr(), 0), // strip off port |
| 29 | server_socket_( |
| 30 | int_factory->CreateAsyncSocket(int_addr.family(), SOCK_STREAM)) { |
deadbeef | 37f5ecf | 2017-02-27 22:06:41 | [diff] [blame] | 31 | RTC_DCHECK(server_socket_.get() != nullptr); |
nisse | ede5da4 | 2017-01-12 13:15:36 | [diff] [blame] | 32 | RTC_DCHECK(int_addr.family() == AF_INET || int_addr.family() == AF_INET6); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 33 | server_socket_->Bind(int_addr); |
| 34 | server_socket_->Listen(5); |
| 35 | server_socket_->SignalReadEvent.connect(this, &ProxyServer::OnAcceptEvent); |
| 36 | } |
| 37 | |
Niels Möller | d970967 | 2019-03-25 07:57:50 | [diff] [blame] | 38 | ProxyServer::~ProxyServer() = default; |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 39 | |
deadbeef | c5d0d95 | 2015-07-16 17:22:21 | [diff] [blame] | 40 | SocketAddress ProxyServer::GetServerAddress() { |
| 41 | return server_socket_->GetLocalAddress(); |
| 42 | } |
| 43 | |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 44 | void ProxyServer::OnAcceptEvent(AsyncSocket* socket) { |
kwiberg | ee89e78 | 2017-08-10 00:22:01 | [diff] [blame] | 45 | RTC_DCHECK(socket); |
| 46 | RTC_DCHECK_EQ(socket, server_socket_.get()); |
deadbeef | 37f5ecf | 2017-02-27 22:06:41 | [diff] [blame] | 47 | AsyncSocket* int_socket = socket->Accept(nullptr); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 48 | AsyncProxyServerSocket* wrapped_socket = WrapSocket(int_socket); |
Yves Gerey | 665174f | 2018-06-19 13:03:05 | [diff] [blame] | 49 | AsyncSocket* ext_socket = |
| 50 | ext_factory_->CreateAsyncSocket(ext_ip_.family(), SOCK_STREAM); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 51 | if (ext_socket) { |
| 52 | ext_socket->Bind(ext_ip_); |
Niels Möller | d970967 | 2019-03-25 07:57:50 | [diff] [blame] | 53 | bindings_.emplace_back( |
| 54 | absl::make_unique<ProxyBinding>(wrapped_socket, ext_socket)); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 55 | } else { |
Mirko Bonadei | 675513b | 2017-11-09 10:09:25 | [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 | [diff] [blame] | 58 | } |
| 59 | } |
| 60 | |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 61 | // ProxyBinding |
| 62 | ProxyBinding::ProxyBinding(AsyncProxyServerSocket* int_socket, |
| 63 | AsyncSocket* ext_socket) |
Yves Gerey | 665174f | 2018-06-19 13:03:05 | [diff] [blame] | 64 | : int_socket_(int_socket), |
| 65 | ext_socket_(ext_socket), |
| 66 | connected_(false), |
| 67 | out_buffer_(kBufferSize), |
| 68 | in_buffer_(kBufferSize) { |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 69 | int_socket_->SignalConnectRequest.connect(this, |
| 70 | &ProxyBinding::OnConnectRequest); |
| 71 | int_socket_->SignalReadEvent.connect(this, &ProxyBinding::OnInternalRead); |
| 72 | int_socket_->SignalWriteEvent.connect(this, &ProxyBinding::OnInternalWrite); |
| 73 | int_socket_->SignalCloseEvent.connect(this, &ProxyBinding::OnInternalClose); |
| 74 | ext_socket_->SignalConnectEvent.connect(this, |
| 75 | &ProxyBinding::OnExternalConnect); |
| 76 | ext_socket_->SignalReadEvent.connect(this, &ProxyBinding::OnExternalRead); |
| 77 | ext_socket_->SignalWriteEvent.connect(this, &ProxyBinding::OnExternalWrite); |
| 78 | ext_socket_->SignalCloseEvent.connect(this, &ProxyBinding::OnExternalClose); |
| 79 | } |
| 80 | |
kwiberg@webrtc.org | 67186fe | 2015-03-09 22:21:53 | [diff] [blame] | 81 | ProxyBinding::~ProxyBinding() = default; |
| 82 | |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 83 | void ProxyBinding::OnConnectRequest(AsyncProxyServerSocket* socket, |
Yves Gerey | 665174f | 2018-06-19 13:03:05 | [diff] [blame] | 84 | const SocketAddress& addr) { |
kwiberg | ee89e78 | 2017-08-10 00:22:01 | [diff] [blame] | 85 | RTC_DCHECK(!connected_); |
| 86 | RTC_DCHECK(ext_socket_); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 87 | ext_socket_->Connect(addr); |
| 88 | // TODO: handle errors here |
| 89 | } |
| 90 | |
| 91 | void ProxyBinding::OnInternalRead(AsyncSocket* socket) { |
| 92 | Read(int_socket_.get(), &out_buffer_); |
| 93 | Write(ext_socket_.get(), &out_buffer_); |
| 94 | } |
| 95 | |
| 96 | void ProxyBinding::OnInternalWrite(AsyncSocket* socket) { |
| 97 | Write(int_socket_.get(), &in_buffer_); |
| 98 | } |
| 99 | |
| 100 | void ProxyBinding::OnInternalClose(AsyncSocket* socket, int err) { |
| 101 | Destroy(); |
| 102 | } |
| 103 | |
| 104 | void ProxyBinding::OnExternalConnect(AsyncSocket* socket) { |
deadbeef | 37f5ecf | 2017-02-27 22:06:41 | [diff] [blame] | 105 | RTC_DCHECK(socket != nullptr); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 106 | connected_ = true; |
| 107 | int_socket_->SendConnectResult(0, socket->GetRemoteAddress()); |
| 108 | } |
| 109 | |
| 110 | void ProxyBinding::OnExternalRead(AsyncSocket* socket) { |
| 111 | Read(ext_socket_.get(), &in_buffer_); |
| 112 | Write(int_socket_.get(), &in_buffer_); |
| 113 | } |
| 114 | |
| 115 | void ProxyBinding::OnExternalWrite(AsyncSocket* socket) { |
| 116 | Write(ext_socket_.get(), &out_buffer_); |
| 117 | } |
| 118 | |
| 119 | void ProxyBinding::OnExternalClose(AsyncSocket* socket, int err) { |
| 120 | if (!connected_) { |
| 121 | int_socket_->SendConnectResult(err, SocketAddress()); |
| 122 | } |
| 123 | Destroy(); |
| 124 | } |
| 125 | |
| 126 | void ProxyBinding::Read(AsyncSocket* socket, FifoBuffer* buffer) { |
| 127 | // Only read if the buffer is empty. |
deadbeef | 37f5ecf | 2017-02-27 22:06:41 | [diff] [blame] | 128 | RTC_DCHECK(socket != nullptr); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 129 | size_t size; |
| 130 | int read; |
| 131 | if (buffer->GetBuffered(&size) && size == 0) { |
| 132 | void* p = buffer->GetWriteBuffer(&size); |
Stefan Holmer | 9131efd | 2016-05-23 16:19:26 | [diff] [blame] | 133 | read = socket->Recv(p, size, nullptr); |
andresp@webrtc.org | ff689be | 2015-02-12 11:54:26 | [diff] [blame] | 134 | buffer->ConsumeWriteBuffer(std::max(read, 0)); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 135 | } |
| 136 | } |
| 137 | |
| 138 | void ProxyBinding::Write(AsyncSocket* socket, FifoBuffer* buffer) { |
deadbeef | 37f5ecf | 2017-02-27 22:06:41 | [diff] [blame] | 139 | RTC_DCHECK(socket != nullptr); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 140 | size_t size; |
| 141 | int written; |
| 142 | const void* p = buffer->GetReadData(&size); |
| 143 | written = socket->Send(p, size); |
andresp@webrtc.org | ff689be | 2015-02-12 11:54:26 | [diff] [blame] | 144 | buffer->ConsumeReadData(std::max(written, 0)); |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | void ProxyBinding::Destroy() { |
| 148 | SignalDestroyed(this); |
| 149 | } |
| 150 | |
deadbeef | f137e97 | 2017-03-23 22:45:49 | [diff] [blame] | 151 | AsyncProxyServerSocket* SocksProxyServer::WrapSocket(AsyncSocket* socket) { |
| 152 | return new AsyncSocksProxyServerSocket(socket); |
| 153 | } |
| 154 | |
henrike@webrtc.org | f048872 | 2014-05-13 18:00:26 | [diff] [blame] | 155 | } // namespace rtc |