I2P: End-to-End encrypted and anonymous Internet https://i2pd.website/
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#ifndef SOCKS4A_H__
#define SOCKS4A_H__
#include <thread>
#include <boost/asio.hpp>
#include <vector>
#include <mutex>
#include <memory>
#include "Identity.h"
#include "Streaming.h"
namespace i2p
{
namespace proxy
{
const 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;
std::shared_ptr<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();
boost::asio::io_service& GetService () { return m_ios; };
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