include/libtorrent/socks5_stream.hpp

   1 /*
   2
   3 Copyright (c) 2007, Arvid Norberg
   4 All rights reserved.
   5
   6 Redistribution and use in source and binary forms, with or without
   7 modification, are permitted provided that the following conditions
   8 are met:
   9
  10     * Redistributions of source code must retain the above copyright
  11       notice, this list of conditions and the following disclaimer.
  12     * Redistributions in binary form must reproduce the above copyright
  13       notice, this list of conditions and the following disclaimer in
  14       the documentation and/or other materials provided with the distribution.
  15     * Neither the name of the author nor the names of its
  16       contributors may be used to endorse or promote products derived
  17       from this software without specific prior written permission.
  18
  19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  20 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  23 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29 POSSIBILITY OF SUCH DAMAGE.
  30
  31 */
  32
  33 #ifndef TORRENT_SOCKS5_STREAM_HPP_INCLUDED
  34 #define TORRENT_SOCKS5_STREAM_HPP_INCLUDED
  35
  36 #include "libtorrent/proxy_base.hpp"
  37
  38 namespace libtorrent {
  39
  40 class socks5_stream : public proxy_base
  41 {
  42 public:
  43
  44         explicit socks5_stream(io_service& io_service)
  45                 : proxy_base(io_service)
  46         {}
  47
  48         void set_username(std::string const& user
  49                 , std::string const& password)
  50         {
  51                 m_user = user;
  52                 m_password = password;
  53         }
  54
  55         typedef boost::function<void(error_code const&)> handler_type;
  56
  57         template <class Handler>
  58         void async_connect(endpoint_type const& endpoint, Handler const& handler)
  59         {
  60                 m_remote_endpoint = endpoint;
  61
  62                 // the connect is split up in the following steps:
  63                 // 1. resolve name of proxy server
  64                 // 2. connect to proxy server
  65                 // 3. send SOCKS5 authentication method message
  66                 // 4. read SOCKS5 authentication response
  67                 // 5. send username+password
  68                 // 6. send SOCKS5 CONNECT message
  69
  70                 // to avoid unnecessary copying of the handler,
  71                 // store it in a shaed_ptr
  72                 boost::shared_ptr<handler_type> h(new handler_type(handler));
  73
  74                 tcp::resolver::query q(m_hostname
  75                         , boost::lexical_cast<std::string>(m_port));
  76                 m_resolver.async_resolve(q, boost::bind(
  77                         &socks5_stream::name_lookup, this, _1, _2, h));
  78         }
  79
  80 private:
  81
  82         void name_lookup(error_code const& e, tcp::resolver::iterator i
  83                 , boost::shared_ptr<handler_type> h);
  84         void connected(error_code const& e, boost::shared_ptr<handler_type> h);
  85         void handshake1(error_code const& e, boost::shared_ptr<handler_type> h);
  86         void handshake2(error_code const& e, boost::shared_ptr<handler_type> h);
  87         void handshake3(error_code const& e, boost::shared_ptr<handler_type> h);
  88         void handshake4(error_code const& e, boost::shared_ptr<handler_type> h);
  89         void socks_connect(boost::shared_ptr<handler_type> h);
  90         void connect1(error_code const& e, boost::shared_ptr<handler_type> h);
  91         void connect2(error_code const& e, boost::shared_ptr<handler_type> h);
  92         void connect3(error_code const& e, boost::shared_ptr<handler_type> h);
  93
  94         // send and receive buffer
  95         std::vector<char> m_buffer;
  96         // proxy authentication
  97         std::string m_user;
  98         std::string m_password;
  99 };
 100
 101 }
 102
 103 #endif
 104