forked from premiere/premiere-libtorrent
216 lines
6.1 KiB
C++
216 lines
6.1 KiB
C++
/*
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Copyright (c) 2007-2014, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_SOCKS5_STREAM_HPP_INCLUDED
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#define TORRENT_SOCKS5_STREAM_HPP_INCLUDED
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#include "aux_/disable_warnings_push.hpp"
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#include <boost/bind.hpp>
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#include <boost/shared_ptr.hpp>
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#include "aux_/disable_warnings_pop.hpp"
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#include "libtorrent/proxy_base.hpp"
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#include "libtorrent/assert.hpp"
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#if defined TORRENT_ASIO_DEBUGGING
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#include "libtorrent/debug.hpp"
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#endif
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namespace libtorrent {
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namespace socks_error {
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// SOCKS5 error values. If an error_code has the
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// socks error category (get_socks_category()), these
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// are the error values.
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enum socks_error_code
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{
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no_error = 0,
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unsupported_version,
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unsupported_authentication_method,
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unsupported_authentication_version,
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authentication_error,
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username_required,
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general_failure,
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command_not_supported,
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no_identd,
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identd_error,
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num_errors
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};
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// internal
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TORRENT_EXPORT boost::system::error_code make_error_code(socks_error_code e);
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} // namespace socks_error
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// returns the error_category for SOCKS5 errors
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TORRENT_EXPORT boost::system::error_category& get_socks_category();
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class socks5_stream : public proxy_base
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{
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public:
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// commands
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enum {
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socks5_connect = 1,
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socks5_bind = 2,
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socks5_udp_associate = 3
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};
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explicit socks5_stream(io_service& io_service)
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: proxy_base(io_service)
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, m_version(5)
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, m_command(socks5_connect)
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, m_listen(0)
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{}
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void set_version(int v) { m_version = v; }
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void set_command(int c)
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{
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TORRENT_ASSERT(c >= socks5_connect && c <=socks5_udp_associate);
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m_command = c;
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}
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void set_username(std::string const& user
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, std::string const& password)
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{
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m_user = user;
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m_password = password;
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}
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void set_dst_name(std::string const& host)
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{
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m_dst_name = host;
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if (m_dst_name.size() > 255)
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m_dst_name.resize(255);
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}
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void close(error_code& ec)
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{
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m_hostname.clear();
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m_dst_name.clear();
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proxy_base::close(ec);
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}
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#ifndef BOOST_NO_EXCEPTIONS
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void close()
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{
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m_hostname.clear();
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m_dst_name.clear();
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proxy_base::close();
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}
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#endif
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// TODO: 2 add async_connect() that takes a hostname and port as well
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template <class Handler>
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void async_connect(endpoint_type const& endpoint, Handler const& handler)
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{
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// make sure we don't try to connect to INADDR_ANY. binding is fine,
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// and using a hostname is fine on SOCKS version 5.
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TORRENT_ASSERT(m_command == socks5_bind
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|| endpoint.address() != address()
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|| (!m_dst_name.empty() && m_version == 5));
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m_remote_endpoint = endpoint;
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// the connect is split up in the following steps:
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// 1. resolve name of proxy server
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// 2. connect to proxy server
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// 3. if version == 5:
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// 3.1 send SOCKS5 authentication method message
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// 3.2 read SOCKS5 authentication response
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// 3.3 send username+password
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// 4. send SOCKS command message
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// to avoid unnecessary copying of the handler,
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// store it in a shaed_ptr
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boost::shared_ptr<handler_type> h(new handler_type(handler));
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#if defined TORRENT_ASIO_DEBUGGING
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add_outstanding_async("socks5_stream::name_lookup");
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#endif
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tcp::resolver::query q(m_hostname, to_string(m_port).elems);
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m_resolver.async_resolve(q, boost::bind(
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&socks5_stream::name_lookup, this, _1, _2, h));
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}
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private:
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void name_lookup(error_code const& e, tcp::resolver::iterator i
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, boost::shared_ptr<handler_type> h);
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void connected(error_code const& e, boost::shared_ptr<handler_type> h);
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void handshake1(error_code const& e, boost::shared_ptr<handler_type> h);
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void handshake2(error_code const& e, boost::shared_ptr<handler_type> h);
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void handshake3(error_code const& e, boost::shared_ptr<handler_type> h);
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void handshake4(error_code const& e, boost::shared_ptr<handler_type> h);
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void socks_connect(boost::shared_ptr<handler_type> h);
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void connect1(error_code const& e, boost::shared_ptr<handler_type> h);
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void connect2(error_code const& e, boost::shared_ptr<handler_type> h);
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void connect3(error_code const& e, boost::shared_ptr<handler_type> h);
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// send and receive buffer
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std::vector<char> m_buffer;
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// proxy authentication
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std::string m_user;
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std::string m_password;
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std::string m_dst_name;
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int m_version;
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// the socks command to send for this connection (connect, bind,
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// udp associate)
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int m_command;
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// set to one when we're waiting for the
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// second message to accept an incoming connection
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int m_listen;
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};
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}
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#if BOOST_VERSION >= 103500
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namespace boost { namespace system {
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template<> struct is_error_code_enum<libtorrent::socks_error::socks_error_code>
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{ static const bool value = true; };
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template<> struct is_error_condition_enum<libtorrent::socks_error::socks_error_code>
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{ static const bool value = true; };
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} }
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#endif // BOOST_VERSION
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#endif
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