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 | #ifndef WEBRTC_BASE_PROXYSERVER_H_ |
| 12 | #define WEBRTC_BASE_PROXYSERVER_H_ |
| 13 | |
| 14 | #include <list> |
| 15 | #include "webrtc/base/asyncsocket.h" |
| 16 | #include "webrtc/base/socketadapters.h" |
| 17 | #include "webrtc/base/socketaddress.h" |
| 18 | #include "webrtc/base/stream.h" |
| 19 | |
| 20 | namespace rtc { |
| 21 | |
| 22 | class SocketFactory; |
| 23 | |
| 24 | // ProxyServer is a base class that allows for easy construction of proxy |
| 25 | // servers. With its helper class ProxyBinding, it contains all the necessary |
| 26 | // logic for receiving and bridging connections. The specific client-server |
| 27 | // proxy protocol is implemented by an instance of the AsyncProxyServerSocket |
| 28 | // class; children of ProxyServer implement WrapSocket appropriately to return |
| 29 | // the correct protocol handler. |
| 30 | |
| 31 | class ProxyBinding : public sigslot::has_slots<> { |
| 32 | public: |
| 33 | ProxyBinding(AsyncProxyServerSocket* in_socket, AsyncSocket* out_socket); |
| 34 | sigslot::signal1<ProxyBinding*> SignalDestroyed; |
| 35 | |
| 36 | private: |
| 37 | void OnConnectRequest(AsyncProxyServerSocket* socket, |
| 38 | const SocketAddress& addr); |
| 39 | void OnInternalRead(AsyncSocket* socket); |
| 40 | void OnInternalWrite(AsyncSocket* socket); |
| 41 | void OnInternalClose(AsyncSocket* socket, int err); |
| 42 | void OnExternalConnect(AsyncSocket* socket); |
| 43 | void OnExternalRead(AsyncSocket* socket); |
| 44 | void OnExternalWrite(AsyncSocket* socket); |
| 45 | void OnExternalClose(AsyncSocket* socket, int err); |
| 46 | |
| 47 | static void Read(AsyncSocket* socket, FifoBuffer* buffer); |
| 48 | static void Write(AsyncSocket* socket, FifoBuffer* buffer); |
| 49 | void Destroy(); |
| 50 | |
| 51 | static const int kBufferSize = 4096; |
| 52 | scoped_ptr<AsyncProxyServerSocket> int_socket_; |
| 53 | scoped_ptr<AsyncSocket> ext_socket_; |
| 54 | bool connected_; |
| 55 | FifoBuffer out_buffer_; |
| 56 | FifoBuffer in_buffer_; |
| 57 | DISALLOW_EVIL_CONSTRUCTORS(ProxyBinding); |
| 58 | }; |
| 59 | |
| 60 | class ProxyServer : public sigslot::has_slots<> { |
| 61 | public: |
| 62 | ProxyServer(SocketFactory* int_factory, const SocketAddress& int_addr, |
| 63 | SocketFactory* ext_factory, const SocketAddress& ext_ip); |
| 64 | virtual ~ProxyServer(); |
| 65 | |
| 66 | protected: |
| 67 | void OnAcceptEvent(AsyncSocket* socket); |
| 68 | virtual AsyncProxyServerSocket* WrapSocket(AsyncSocket* socket) = 0; |
| 69 | void OnBindingDestroyed(ProxyBinding* binding); |
| 70 | |
| 71 | private: |
| 72 | typedef std::list<ProxyBinding*> BindingList; |
| 73 | SocketFactory* ext_factory_; |
| 74 | SocketAddress ext_ip_; |
| 75 | scoped_ptr<AsyncSocket> server_socket_; |
| 76 | BindingList bindings_; |
| 77 | DISALLOW_EVIL_CONSTRUCTORS(ProxyServer); |
| 78 | }; |
| 79 | |
| 80 | // SocksProxyServer is a simple extension of ProxyServer to implement SOCKS. |
| 81 | class SocksProxyServer : public ProxyServer { |
| 82 | public: |
| 83 | SocksProxyServer(SocketFactory* int_factory, const SocketAddress& int_addr, |
| 84 | SocketFactory* ext_factory, const SocketAddress& ext_ip) |
| 85 | : ProxyServer(int_factory, int_addr, ext_factory, ext_ip) { |
| 86 | } |
| 87 | protected: |
| 88 | AsyncProxyServerSocket* WrapSocket(AsyncSocket* socket) { |
| 89 | return new AsyncSocksProxyServerSocket(socket); |
| 90 | } |
| 91 | DISALLOW_EVIL_CONSTRUCTORS(SocksProxyServer); |
| 92 | }; |
| 93 | |
| 94 | } // namespace rtc |
| 95 | |
| 96 | #endif // WEBRTC_BASE_PROXYSERVER_H_ |