add socks proxy

SOCKS.h

@@ -0,0 +1,98 @@
+#ifndef SOCKS4A_H__
+#define SOCKS4A_H__
+
+#include <thread>
+#include <boost/asio.hpp>
+#include <vector>
+#include <mutex>
+
+#include "Identity.h"
+#include "Streaming.h"
+
+namespace i2p
+{
+namespace proxy
+{
+
+	constexpr size_t socks_buffer_size = 8192;
+
+	class SOCKS4AHandler {
+
+		private:
+            enum state {
+                    INITIAL,
+                    OKAY,
+                    END
+            };
+
+            void GotClientRequest(boost::system::error_code & ecode, std::string & host, uint16_t port);
+            void HandleSockRecv(const boost::system::error_code & ecode, std::size_t bytes_transfered);
+            void HandleSockForward(const boost::system::error_code & ecode, std::size_t bytes_transfered);
+            void HandleStreamRecv(const boost::system::error_code & ecode, std::size_t bytes_transfered);
+            void Terminate();
+            void CloseSock();
+            void CloseStream();
+            void AsyncSockRead();
+            void AsyncStreamRead();
+            void SocksFailed();
+            void LeaseSetTimeout(const boost::system::error_code & ecode);
+            void StreamWrote(const boost::system::error_code & ecode);		  
+            void SockWrote(const boost::system::error_code & ecode);
+            void SentConnectionSuccess(const boost::system::error_code & ecode);
+            void ConnectionSuccess();
+            
+            uint8_t m_sock_buff[socks_buffer_size];
+            uint8_t m_stream_buff[socks_buffer_size];
+            
+            boost::asio::io_service * m_ios;
+            boost::asio::ip::tcp::socket * m_sock;
+            boost::asio::deadline_timer m_ls_timer;
+            i2p::stream::Stream * m_stream;
+            i2p::data::LeaseSet * m_ls;
+            i2p::data::IdentHash m_dest;
+            state m_state;
+		
+            
+		public:
+			SOCKS4AHandler(boost::asio::io_service * ios, boost::asio::ip::tcp::socket * sock) : 
+				m_ios(ios), m_sock(sock), m_ls_timer(*ios),
+				m_stream(nullptr), m_ls(nullptr), m_state(INITIAL) { AsyncSockRead(); }
+
+			~SOCKS4AHandler() { CloseSock(); CloseStream(); }
+			bool isComplete() { return m_state == END; }
+	};
+
+	class SOCKS4AServer {
+		public:
+			SOCKS4AServer(int port) : m_run(false), 
+									  m_thread(nullptr), 
+									  m_work(m_ios),
+									  m_acceptor(m_ios, boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), port)),
+									  m_new_sock(nullptr) { }
+			~SOCKS4AServer() { Stop(); }
+			void Start();
+			void Stop();
+		
+
+		private:
+		
+			void Run();
+			void Accept();
+			void HandleAccept(const boost::system::error_code& ecode);
+
+			bool m_run;
+			std::thread * m_thread;
+			boost::asio::io_service m_ios;
+			boost::asio::io_service::work m_work;
+            boost::asio::ip::tcp::acceptor m_acceptor;
+			boost::asio::ip::tcp::socket * m_new_sock;
+		
+
+	};
+
+	typedef SOCKS4AServer SOCKSProxy;
+}
+}
+
+
+#endif