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#ifndef SOCKS4A_H__
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#define SOCKS4A_H__
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#include <climits>
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#include <memory>
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#include <boost/asio.hpp>
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#include "Identity.h"
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#include "Streaming.h"
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#include "I2PTunnel.h"
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namespace i2p
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{
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namespace proxy
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{
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const size_t socks_buffer_size = 8192;
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class SOCKS4AServer;
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class SOCKS4AHandler {
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private:
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enum state {
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GET_VERSION,
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SOCKS4A,
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READY
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};
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enum parseState {
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GET4A_COMMAND,
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GET4A_PORT1,
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GET4A_PORT2,
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GET4A_IP1,
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GET4A_IP2,
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GET4A_IP3,
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GET4A_IP4,
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GET4A_IDENT,
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GET4A_HOST,
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DONE
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};
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void GotClientRequest(boost::system::error_code & ecode, std::string & host, uint16_t port);
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std::size_t HandleData(uint8_t *sock_buff, std::size_t len);
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std::size_t HandleVersion(uint8_t *sock_buff);
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std::size_t HandleSOCKS4A(uint8_t *sock_buff, std::size_t len);
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void HandleSockRecv(const boost::system::error_code & ecode, std::size_t bytes_transfered);
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void Terminate();
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void CloseSock();
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void CloseStream();
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void AsyncSockRead();
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void SocksFailed();
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void SentSocksFailed(const boost::system::error_code & ecode);
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void SentConnectionSuccess(const boost::system::error_code & ecode);
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void ConnectionSuccess();
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void HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream);
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uint8_t m_sock_buff[socks_buffer_size];
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SOCKS4AServer * m_parent;
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boost::asio::ip::tcp::socket * m_sock;
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std::shared_ptr<i2p::stream::Stream> m_stream;
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state m_state;
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parseState m_pstate;
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uint8_t m_command;
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uint16_t m_port;
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uint32_t m_ip;
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std::string m_destination;
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public:
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SOCKS4AHandler(SOCKS4AServer * parent, boost::asio::ip::tcp::socket * sock) :
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m_parent(parent), m_sock(sock), m_stream(nullptr), m_state(GET_VERSION)
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{ AsyncSockRead(); m_destination.reserve(HOST_NAME_MAX+1); }
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~SOCKS4AHandler() { CloseSock(); CloseStream(); }
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};
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class SOCKS4AServer: public i2p::client::I2PTunnel
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{
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public:
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SOCKS4AServer(int port) : I2PTunnel(nullptr),
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m_Acceptor (GetService (), boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), port)),
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m_Timer (GetService ()) {};
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~SOCKS4AServer() { Stop(); }
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void Start ();
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void Stop ();
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private:
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void Accept();
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void HandleAccept(const boost::system::error_code& ecode, boost::asio::ip::tcp::socket * socket);
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private:
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boost::asio::ip::tcp::acceptor m_Acceptor;
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boost::asio::deadline_timer m_Timer;
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};
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typedef SOCKS4AServer SOCKSProxy;
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}
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}
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#endif
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