premiere-libtorrent/src/http_tracker_connection.cpp

534 lines
14 KiB
C++
Raw Normal View History

2004-01-31 11:46:15 +01:00
/*
Copyright (c) 2003, Arvid Norberg
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the distribution.
* Neither the name of the author nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
#include "libtorrent/pch.hpp"
2004-01-31 11:46:15 +01:00
#include <vector>
#include <cctype>
#include <algorithm>
2004-01-31 11:46:15 +01:00
#include "libtorrent/config.hpp"
#include "libtorrent/gzip.hpp"
#include "libtorrent/socket_io.hpp"
2004-01-31 11:46:15 +01:00
#ifdef _MSC_VER
#pragma warning(push, 1)
#endif
#include <boost/bind.hpp>
#ifdef _MSC_VER
#pragma warning(pop)
#endif
2004-01-31 11:46:15 +01:00
#include "libtorrent/tracker_manager.hpp"
#include "libtorrent/http_tracker_connection.hpp"
#include "libtorrent/http_connection.hpp"
2004-01-31 11:46:15 +01:00
#include "libtorrent/entry.hpp"
#include "libtorrent/bencode.hpp"
#include "libtorrent/torrent.hpp"
2004-03-12 17:42:33 +01:00
#include "libtorrent/io.hpp"
#include "libtorrent/socket.hpp"
2008-10-22 21:40:32 +02:00
#include "libtorrent/aux_/session_impl.hpp"
2004-01-31 11:46:15 +01:00
using namespace libtorrent;
using boost::bind;
2004-01-31 11:46:15 +01:00
namespace libtorrent
{
2009-09-06 02:57:01 +02:00
#if TORRENT_USE_I2P
// defined in torrent_info.cpp
bool is_i2p_url(std::string const& url);
#endif
2004-01-31 11:46:15 +01:00
http_tracker_connection::http_tracker_connection(
2008-01-08 06:47:43 +01:00
io_service& ios
, connection_queue& cc
, tracker_manager& man
2004-07-25 22:57:44 +02:00
, tracker_request const& req
2004-09-16 03:14:16 +02:00
, boost::weak_ptr<request_callback> c
2008-10-22 21:40:32 +02:00
, aux::session_impl const& ses
, proxy_settings const& ps
2009-08-20 05:19:12 +02:00
, std::string const& auth
#if TORRENT_USE_I2P
, i2p_connection* i2p_conn
#endif
)
: tracker_connection(man, req, ios, c)
2004-07-25 22:57:44 +02:00
, m_man(man)
2008-10-22 21:40:32 +02:00
, m_ses(ses)
, m_ps(ps)
, m_cc(cc)
, m_ios(ios)
2009-08-20 05:19:12 +02:00
#if TORRENT_USE_I2P
, m_i2p_conn(i2p_conn)
#endif
{}
void http_tracker_connection::start()
2004-01-31 11:46:15 +01:00
{
// TODO: authentication
std::string url = tracker_req().url;
if (tracker_req().kind == tracker_request::scrape_request)
2005-03-11 18:21:56 +01:00
{
// find and replace "announce" with "scrape"
2005-03-11 18:21:56 +01:00
// in request
std::size_t pos = url.find("announce");
2005-03-11 18:21:56 +01:00
if (pos == std::string::npos)
2007-12-29 19:24:50 +01:00
{
m_ios.post(boost::bind(&http_tracker_connection::fail_disp, self()
, -1, "scrape is not available on url: '" + tracker_req().url +"'"));
2007-12-29 19:24:50 +01:00
return;
}
url.replace(pos, 8, "scrape");
2005-03-11 18:21:56 +01:00
}
2009-08-20 05:19:12 +02:00
#if TORRENT_USE_I2P
bool i2p = is_i2p_url(url);
#else
static const bool i2p = false;
#endif
2008-10-22 21:40:32 +02:00
session_settings const& settings = m_ses.settings();
2005-03-11 18:21:56 +01:00
// if request-string already contains
// some parameters, append an ampersand instead
// of a question mark
size_t arguments_start = url.find('?');
if (arguments_start != std::string::npos)
url += "&";
2005-03-11 18:21:56 +01:00
else
url += "?";
2005-03-11 18:21:56 +01:00
url += "info_hash=";
url += escape_string((const char*)&tracker_req().info_hash[0], 20);
if (tracker_req().kind == tracker_request::announce_request)
2005-03-11 18:21:56 +01:00
{
char str[1024];
2009-09-06 18:47:48 +02:00
snprintf(str, sizeof(str), "&peer_id=%s&port=%d&uploaded=%"PRId64
"&downloaded=%"PRId64"&left=%"PRId64"&compact=1&numwant=%d&key=%x&no_peer_id=1"
, escape_string((const char*)&tracker_req().pid[0], 20).c_str()
2009-08-20 05:19:12 +02:00
// the i2p tracker seems to verify that the port is not 0,
// even though it ignores it otherwise
, i2p ? 1 : tracker_req().listen_port
, tracker_req().uploaded
, tracker_req().downloaded
, tracker_req().left
, tracker_req().num_want
2009-09-06 09:23:01 +02:00
, tracker_req().key);
url += str;
2009-06-19 18:38:06 +02:00
#ifndef TORRENT_DISABLE_ENCRYPTION
2009-09-06 09:23:01 +02:00
if (m_ses.get_pe_settings().in_enc_policy != pe_settings::disabled)
url += "&supportcrypto=1";
2009-06-19 18:38:06 +02:00
#endif
if (tracker_req().event != tracker_request::none)
2005-03-11 18:21:56 +01:00
{
const char* event_string[] = {"completed", "started", "stopped"};
url += "&event=";
url += event_string[tracker_req().event - 1];
}
2009-08-20 05:19:12 +02:00
#if TORRENT_USE_I2P
if (i2p)
{
url += "&ip=";
url += escape_string(m_i2p_conn->local_endpoint().c_str()
, m_i2p_conn->local_endpoint().size());
url += ".i2p";
}
else
#endif
2008-10-22 21:40:32 +02:00
if (settings.announce_ip != address())
2007-06-13 02:20:06 +02:00
{
error_code ec;
2008-10-22 21:40:32 +02:00
std::string ip = settings.announce_ip.to_string(ec);
if (!ec) url += "&ip=" + ip;
2007-06-13 02:20:06 +02:00
}
2005-03-11 18:21:56 +01:00
2009-08-20 05:19:12 +02:00
if (!tracker_req().ipv6.empty() && !i2p)
2009-04-12 02:37:06 +02:00
{
url += "&ipv6=";
url += tracker_req().ipv6;
}
2009-08-20 05:19:12 +02:00
if (!tracker_req().ipv4.empty() && !i2p)
2009-04-12 02:37:06 +02:00
{
url += "&ipv4=";
url += tracker_req().ipv4;
}
2004-01-31 11:46:15 +01:00
}
2004-02-23 23:54:54 +01:00
m_tracker_connection.reset(new http_connection(m_ios, m_cc
2008-10-22 21:40:32 +02:00
, boost::bind(&http_tracker_connection::on_response, self(), _1, _2, _3, _4)
, true
, boost::bind(&http_tracker_connection::on_connect, self(), _1)
2008-10-22 21:40:32 +02:00
, boost::bind(&http_tracker_connection::on_filter, self(), _1, _2)));
int timeout = tracker_req().event==tracker_request::stopped
2008-10-22 21:40:32 +02:00
?settings.stop_tracker_timeout
:settings.tracker_completion_timeout;
m_tracker_connection->get(url, seconds(timeout)
2009-08-20 05:19:12 +02:00
, 1, &m_ps, 5, settings.user_agent, bind_interface()
#if TORRENT_USE_I2P
, m_i2p_conn
#endif
);
// the url + 100 estimated header size
sent_bytes(url.size() + 100);
2005-07-06 15:18:10 +02:00
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
boost::shared_ptr<request_callback> cb = requester();
if (cb)
{
cb->debug_log("==> TRACKER_REQUEST [ url: " + url + " ]");
}
2005-03-19 13:22:40 +01:00
#endif
}
void http_tracker_connection::close()
{
if (m_tracker_connection)
2004-05-21 01:26:40 +02:00
{
m_tracker_connection->close();
m_tracker_connection.reset();
}
tracker_connection::close();
}
2004-01-31 11:46:15 +01:00
2008-10-22 21:40:32 +02:00
void http_tracker_connection::on_filter(http_connection& c, std::list<tcp::endpoint>& endpoints)
{
// remove endpoints that are filtered by the IP filter
for (std::list<tcp::endpoint>::iterator i = endpoints.begin();
i != endpoints.end();)
{
if (m_ses.m_ip_filter.access(i->address()) == ip_filter::blocked)
i = endpoints.erase(i);
else
++i;
}
2008-10-22 21:40:32 +02:00
if (endpoints.empty())
fail(-1, "blocked by IP filter");
}
void http_tracker_connection::on_connect(http_connection& c)
{
error_code ec;
tcp::endpoint ep = c.socket().remote_endpoint(ec);
m_tracker_ip = ep.address();
boost::shared_ptr<request_callback> cb = requester();
if (cb) cb->m_tracker_address = ep;
}
2008-05-03 18:05:42 +02:00
void http_tracker_connection::on_response(error_code const& ec
, http_parser const& parser, char const* data, int size)
{
2008-02-07 08:15:23 +01:00
// keep this alive
boost::intrusive_ptr<http_tracker_connection> me(this);
2008-02-25 01:55:31 +01:00
if (ec && ec != asio::error::eof)
{
fail(-1, ec.message().c_str());
return;
}
if (!parser.header_finished())
{
fail(-1, "premature end of file");
return;
}
if (parser.status_code() != 200)
{
fail(parser.status_code(), parser.message().c_str());
return;
}
if (ec && ec != asio::error::eof)
{
fail(parser.status_code(), ec.message().c_str());
return;
2004-01-31 11:46:15 +01:00
}
received_bytes(size + parser.body_start());
// handle tracker response
entry e;
e = bdecode(data, data + size);
if (e.type() == entry::dictionary_t)
{
parse(parser.status_code(), e);
2004-05-21 01:26:40 +02:00
}
else
2004-05-21 01:26:40 +02:00
{
std::string error_str("invalid bencoding of tracker response: \"");
for (char const* i = data, *end(data + size); i != end; ++i)
{
if (*i >= ' ' && *i <= '~') error_str += *i;
else
{
char val[30];
snprintf(val, sizeof(val), "0x%02x ", *i);
error_str += val;
}
}
error_str += "\"";
fail(parser.status_code(), error_str.c_str());
2004-05-21 01:26:40 +02:00
}
close();
}
2004-01-31 11:46:15 +01:00
bool http_tracker_connection::extract_peer_info(const entry& info, peer_entry& ret)
2004-01-31 11:46:15 +01:00
{
// extract peer id (if any)
if (info.type() != entry::dictionary_t)
{
fail(-1, "invalid response from tracker (invalid peer entry)");
return false;
}
2004-03-17 13:14:44 +01:00
entry const* i = info.find_key("peer id");
if (i != 0)
2004-01-31 11:46:15 +01:00
{
if (i->type() != entry::string_t || i->string().length() != 20)
{
fail(-1, "invalid response from tracker (invalid peer id)");
return false;
}
std::copy(i->string().begin(), i->string().end(), ret.pid.begin());
2004-01-31 11:46:15 +01:00
}
else
{
// if there's no peer_id, just initialize it to a bunch of zeroes
std::fill_n(ret.pid.begin(), 20, 0);
2004-01-31 11:46:15 +01:00
}
// extract ip
2004-03-17 13:14:44 +01:00
i = info.find_key("ip");
if (i == 0 || i->type() != entry::string_t)
{
fail(-1, "invalid response from tracker");
return false;
}
2004-03-17 13:14:44 +01:00
ret.ip = i->string();
2004-01-31 11:46:15 +01:00
// extract port
2004-03-17 13:14:44 +01:00
i = info.find_key("port");
if (i == 0 || i->type() != entry::int_t)
{
fail(-1, "invalid response from tracker");
return false;
}
2004-03-17 13:14:44 +01:00
ret.port = (unsigned short)i->integer();
2004-01-31 11:46:15 +01:00
return true;
2004-01-31 11:46:15 +01:00
}
void http_tracker_connection::parse(int status_code, entry const& e)
2004-01-31 11:46:15 +01:00
{
boost::shared_ptr<request_callback> cb = requester();
if (!cb) return;
2004-01-31 11:46:15 +01:00
// parse the response
entry const* failure = e.find_key("failure reason");
if (failure && failure->type() == entry::string_t)
2004-01-31 11:46:15 +01:00
{
fail(status_code, failure->string().c_str());
return;
}
entry const* warning = e.find_key("warning message");
if (warning && warning->type() == entry::string_t)
{
cb->tracker_warning(tracker_req(), warning->string());
}
std::vector<peer_entry> peer_list;
if (tracker_req().kind == tracker_request::scrape_request)
{
2008-05-19 09:15:44 +02:00
std::string ih = tracker_req().info_hash.to_string();
2004-10-03 13:39:34 +02:00
entry const* files = e.find_key("files");
if (files == 0 || files->type() != entry::dictionary_t)
{
fail(-1, "invalid or missing 'files' entry in scrape response");
2004-10-03 13:39:34 +02:00
return;
2004-01-31 11:46:15 +01:00
}
2008-05-19 09:15:44 +02:00
entry const* scrape_data = files->find_key(ih);
if (scrape_data == 0 || scrape_data->type() != entry::dictionary_t)
2005-08-11 01:32:39 +02:00
{
fail(-1, "missing or invalid info-hash entry in scrape response");
return;
2005-08-11 01:32:39 +02:00
}
entry const* complete = scrape_data->find_key("complete");
entry const* incomplete = scrape_data->find_key("incomplete");
entry const* downloaded = scrape_data->find_key("downloaded");
if (complete == 0 || incomplete == 0 || downloaded == 0
|| complete->type() != entry::int_t
|| incomplete->type() != entry::int_t
|| downloaded->type() != entry::int_t)
2005-03-11 18:21:56 +01:00
{
fail(-1, "missing 'complete' or 'incomplete' entries in scrape response");
2005-03-11 18:21:56 +01:00
return;
}
2008-04-05 23:18:27 +02:00
cb->tracker_scrape_response(tracker_req(), int(complete->integer())
, int(incomplete->integer()), int(downloaded->integer()));
return;
}
2004-01-31 11:46:15 +01:00
entry const* interval = e.find_key("interval");
if (interval == 0 || interval->type() != entry::int_t)
{
fail(-1, "missing or invalid 'interval' entry in tracker response");
return;
}
entry const* peers_ent = e.find_key("peers");
2009-03-22 23:24:11 +01:00
if (peers_ent && peers_ent->type() == entry::string_t)
{
std::string const& peers = peers_ent->string();
for (std::string::const_iterator i = peers.begin();
i != peers.end();)
2004-01-31 11:46:15 +01:00
{
if (peers.end() - i < 6) break;
2004-03-12 17:42:33 +01:00
peer_entry p;
p.pid.clear();
error_code ec;
p.ip = detail::read_v4_address(i).to_string(ec);
if (ec) continue;
p.port = detail::read_uint16(i);
peer_list.push_back(p);
2004-03-12 17:42:33 +01:00
}
}
2009-03-22 23:24:11 +01:00
else if (peers_ent && peers_ent->type() == entry::list_t)
{
entry::list_type const& l = peers_ent->list();
for(entry::list_type::const_iterator i = l.begin(); i != l.end(); ++i)
2004-03-12 17:42:33 +01:00
{
peer_entry p;
if (!extract_peer_info(*i, p)) return;
peer_list.push_back(p);
2004-01-31 11:46:15 +01:00
}
}
else
{
2009-03-22 23:24:11 +01:00
peers_ent = 0;
}
2004-01-31 11:46:15 +01:00
#if TORRENT_USE_IPV6
entry const* ipv6_peers = e.find_key("peers6");
if (ipv6_peers && ipv6_peers->type() == entry::string_t)
{
std::string const& peers = ipv6_peers->string();
for (std::string::const_iterator i = peers.begin();
i != peers.end();)
2007-09-19 23:54:26 +02:00
{
if (peers.end() - i < 18) break;
peer_entry p;
p.pid.clear();
error_code ec;
p.ip = detail::read_v6_address(i).to_string(ec);
if (ec) continue;
p.port = detail::read_uint16(i);
peer_list.push_back(p);
2007-09-19 23:54:26 +02:00
}
}
2009-03-22 23:24:11 +01:00
else
{
ipv6_peers = 0;
}
#else
entry const* ipv6_peers = 0;
#endif
2009-03-22 23:24:11 +01:00
if (peers_ent == 0 && ipv6_peers == 0)
{
fail(-1, "missing 'peers' and 'peers6' entry in tracker response");
return;
}
2007-09-19 23:54:26 +02:00
// look for optional scrape info
int complete = -1;
int incomplete = -1;
address external_ip;
2005-02-23 09:57:54 +01:00
entry const* ip_ent = e.find_key("external ip");
if (ip_ent && ip_ent->type() == entry::string_t)
{
std::string const& ip = ip_ent->string();
char const* p = &ip[0];
if (ip.size() == address_v4::bytes_type::static_size)
external_ip = detail::read_v4_address(p);
#if TORRENT_USE_IPV6
else if (ip.size() == address_v6::bytes_type::static_size)
external_ip = detail::read_v6_address(p);
#endif
}
entry const* complete_ent = e.find_key("complete");
if (complete_ent && complete_ent->type() == entry::int_t)
2008-04-05 23:18:27 +02:00
complete = int(complete_ent->integer());
2005-02-23 09:57:54 +01:00
entry const* incomplete_ent = e.find_key("incomplete");
if (incomplete_ent && incomplete_ent->type() == entry::int_t)
2008-04-05 23:18:27 +02:00
incomplete = int(incomplete_ent->integer());
std::list<address> ip_list;
2009-09-20 17:32:23 +02:00
if (m_tracker_connection)
2009-09-06 02:57:01 +02:00
{
2009-09-20 17:32:23 +02:00
std::list<tcp::endpoint> const& epts = m_tracker_connection->endpoints();
for (std::list<tcp::endpoint>::const_iterator i = epts.begin()
, end(epts.end()); i != end; ++i)
{
ip_list.push_back(i->address());
}
2009-09-06 02:57:01 +02:00
}
cb->tracker_response(tracker_req(), m_tracker_ip, ip_list, peer_list
, interval->integer(), complete, incomplete, external_ip);
2004-01-31 11:46:15 +01:00
}
}
2005-03-19 13:22:40 +01:00