105 lines
3.5 KiB
C
105 lines
3.5 KiB
C
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/*
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* Copyright 2004 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef RTC_BASE_PROXY_SERVER_H_
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#define RTC_BASE_PROXY_SERVER_H_
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#include <memory>
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#include <vector>
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#include "absl/memory/memory.h"
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#include "rtc_base/async_socket.h"
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#include "rtc_base/constructor_magic.h"
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#include "rtc_base/memory/fifo_buffer.h"
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#include "rtc_base/server_socket_adapters.h"
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#include "rtc_base/socket_address.h"
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namespace rtc {
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class SocketFactory;
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// ProxyServer is a base class that allows for easy construction of proxy
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// servers. With its helper class ProxyBinding, it contains all the necessary
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// logic for receiving and bridging connections. The specific client-server
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// proxy protocol is implemented by an instance of the AsyncProxyServerSocket
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// class; children of ProxyServer implement WrapSocket appropriately to return
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// the correct protocol handler.
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class ProxyBinding : public sigslot::has_slots<> {
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public:
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ProxyBinding(AsyncProxyServerSocket* in_socket, AsyncSocket* out_socket);
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~ProxyBinding() override;
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sigslot::signal1<ProxyBinding*> SignalDestroyed;
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private:
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void OnConnectRequest(AsyncProxyServerSocket* socket,
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const SocketAddress& addr);
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void OnInternalRead(AsyncSocket* socket);
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void OnInternalWrite(AsyncSocket* socket);
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void OnInternalClose(AsyncSocket* socket, int err);
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void OnExternalConnect(AsyncSocket* socket);
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void OnExternalRead(AsyncSocket* socket);
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void OnExternalWrite(AsyncSocket* socket);
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void OnExternalClose(AsyncSocket* socket, int err);
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static void Read(AsyncSocket* socket, FifoBuffer* buffer);
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static void Write(AsyncSocket* socket, FifoBuffer* buffer);
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void Destroy();
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static const int kBufferSize = 4096;
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std::unique_ptr<AsyncProxyServerSocket> int_socket_;
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std::unique_ptr<AsyncSocket> ext_socket_;
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bool connected_;
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FifoBuffer out_buffer_;
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FifoBuffer in_buffer_;
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RTC_DISALLOW_COPY_AND_ASSIGN(ProxyBinding);
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};
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class ProxyServer : public sigslot::has_slots<> {
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public:
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ProxyServer(SocketFactory* int_factory,
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const SocketAddress& int_addr,
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SocketFactory* ext_factory,
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const SocketAddress& ext_ip);
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~ProxyServer() override;
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// Returns the address to which the proxy server is bound
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SocketAddress GetServerAddress();
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protected:
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void OnAcceptEvent(AsyncSocket* socket);
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virtual AsyncProxyServerSocket* WrapSocket(AsyncSocket* socket) = 0;
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private:
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SocketFactory* ext_factory_;
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SocketAddress ext_ip_;
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std::unique_ptr<AsyncSocket> server_socket_;
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std::vector<std::unique_ptr<ProxyBinding>> bindings_;
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RTC_DISALLOW_COPY_AND_ASSIGN(ProxyServer);
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};
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// SocksProxyServer is a simple extension of ProxyServer to implement SOCKS.
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class SocksProxyServer : public ProxyServer {
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public:
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SocksProxyServer(SocketFactory* int_factory,
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const SocketAddress& int_addr,
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SocketFactory* ext_factory,
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const SocketAddress& ext_ip)
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: ProxyServer(int_factory, int_addr, ext_factory, ext_ip) {}
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protected:
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AsyncProxyServerSocket* WrapSocket(AsyncSocket* socket) override;
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RTC_DISALLOW_COPY_AND_ASSIGN(SocksProxyServer);
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};
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} // namespace rtc
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#endif // RTC_BASE_PROXY_SERVER_H_
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