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deluge/libtorrent/src/torrent.cpp

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/*
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"
#include <ctime>
#include <iostream>
#include <fstream>
#include <iomanip>
#include <iterator>
#include <algorithm>
#include <set>
#include <cctype>
#include <numeric>
#ifdef _MSC_VER
#pragma warning(push, 1)
#endif
#include <boost/lexical_cast.hpp>
#include <boost/filesystem/convenience.hpp>
#include <boost/bind.hpp>
#include <boost/thread/mutex.hpp>
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#include "libtorrent/torrent_handle.hpp"
#include "libtorrent/session.hpp"
#include "libtorrent/torrent_info.hpp"
#include "libtorrent/tracker_manager.hpp"
#include "libtorrent/bencode.hpp"
#include "libtorrent/hasher.hpp"
#include "libtorrent/entry.hpp"
#include "libtorrent/peer.hpp"
#include "libtorrent/bt_peer_connection.hpp"
#include "libtorrent/web_peer_connection.hpp"
#include "libtorrent/peer_id.hpp"
#include "libtorrent/alert.hpp"
#include "libtorrent/identify_client.hpp"
#include "libtorrent/alert_types.hpp"
#include "libtorrent/extensions.hpp"
#include "libtorrent/aux_/session_impl.hpp"
#include "libtorrent/instantiate_connection.hpp"
#include "libtorrent/assert.hpp"
using namespace libtorrent;
using boost::tuples::tuple;
using boost::tuples::get;
using boost::tuples::make_tuple;
using boost::bind;
using boost::mutex;
using libtorrent::aux::session_impl;
namespace
{
enum
{
// wait 60 seconds before retrying a failed tracker
tracker_retry_delay_min = 60
// when tracker_failed_max trackers
// has failed, wait 10 minutes instead
, tracker_retry_delay_max = 10 * 60
, tracker_failed_max = 5
};
int calculate_block_size(const torrent_info& i, int default_block_size)
{
if (default_block_size < 1024) default_block_size = 1024;
// if pieces are too small, adjust the block size
if (i.piece_length() < default_block_size)
{
return static_cast<int>(i.piece_length());
}
// otherwise, go with the default
return default_block_size;
}
struct find_peer_by_ip
{
find_peer_by_ip(tcp::endpoint const& a, const torrent* t)
: ip(a)
, tor(t)
{ TORRENT_ASSERT(t != 0); }
bool operator()(session_impl::connection_map::value_type const& c) const
{
tcp::endpoint const& sender = c->remote();
if (sender.address() != ip.address()) return false;
if (tor != c->associated_torrent().lock().get()) return false;
return true;
}
tcp::endpoint const& ip;
torrent const* tor;
};
struct peer_by_id
{
peer_by_id(const peer_id& i): pid(i) {}
bool operator()(session_impl::connection_map::value_type const& p) const
{
if (p->pid() != pid) return false;
// have a special case for all zeros. We can have any number
// of peers with that pid, since it's used to indicate no pid.
if (std::count(pid.begin(), pid.end(), 0) == 20) return false;
return true;
}
peer_id const& pid;
};
}
namespace libtorrent
{
torrent::torrent(
session_impl& ses
, aux::checker_impl& checker
, boost::intrusive_ptr<torrent_info> tf
, fs::path const& save_path
, tcp::endpoint const& net_interface
, storage_mode_t storage_mode
, int block_size
, storage_constructor_type sc
, bool paused)
: m_torrent_file(tf)
, m_abort(false)
, m_paused(paused)
, m_just_paused(false)
, m_event(tracker_request::started)
, m_block_size(0)
, m_storage(0)
, m_next_request(time_now())
, m_duration(1800)
, m_complete(-1)
, m_incomplete(-1)
, m_host_resolver(ses.m_io_service)
#ifndef TORRENT_DISABLE_RESOLVE_COUNTRIES
, m_resolving_country(false)
, m_resolve_countries(false)
#endif
, m_announce_timer(ses.m_io_service)
#ifndef TORRENT_DISABLE_DHT
, m_last_dht_announce(time_now() - minutes(15))
#endif
, m_ses(ses)
, m_checker(checker)
, m_picker(0)
, m_trackers(m_torrent_file->trackers())
, m_last_working_tracker(-1)
, m_currently_trying_tracker(0)
, m_failed_trackers(0)
, m_time_scaler(0)
, m_num_pieces(0)
, m_sequenced_download_threshold(0)
, m_got_tracker_response(false)
, m_ratio(0.f)
, m_total_failed_bytes(0)
, m_total_redundant_bytes(0)
, m_net_interface(net_interface.address(), 0)
, m_save_path(complete(save_path))
, m_storage_mode(storage_mode)
, m_default_block_size(block_size)
, m_connections_initialized(true)
, m_settings(ses.settings())
, m_storage_constructor(sc)
, m_max_uploads((std::numeric_limits<int>::max)())
, m_num_uploads(0)
, m_max_connections((std::numeric_limits<int>::max)())
, m_policy(this)
{
}
torrent::torrent(
session_impl& ses
, aux::checker_impl& checker
, char const* tracker_url
, sha1_hash const& info_hash
, char const* name
, fs::path const& save_path
, tcp::endpoint const& net_interface
, storage_mode_t storage_mode
, int block_size
, storage_constructor_type sc
, bool paused)
: m_torrent_file(new torrent_info(info_hash))
, m_abort(false)
, m_paused(paused)
, m_just_paused(false)
, m_event(tracker_request::started)
, m_block_size(0)
, m_storage(0)
, m_next_request(time_now())
, m_duration(1800)
, m_complete(-1)
, m_incomplete(-1)
, m_host_resolver(ses.m_io_service)
#ifndef TORRENT_DISABLE_RESOLVE_COUNTRIES
, m_resolving_country(false)
, m_resolve_countries(false)
#endif
, m_announce_timer(ses.m_io_service)
#ifndef TORRENT_DISABLE_DHT
, m_last_dht_announce(time_now() - minutes(15))
#endif
, m_ses(ses)
, m_checker(checker)
, m_picker(0)
, m_last_working_tracker(-1)
, m_currently_trying_tracker(0)
, m_failed_trackers(0)
, m_time_scaler(0)
, m_num_pieces(0)
, m_sequenced_download_threshold(0)
, m_got_tracker_response(false)
, m_ratio(0.f)
, m_total_failed_bytes(0)
, m_total_redundant_bytes(0)
, m_net_interface(net_interface.address(), 0)
, m_save_path(complete(save_path))
, m_storage_mode(storage_mode)
, m_default_block_size(block_size)
, m_connections_initialized(false)
, m_settings(ses.settings())
, m_storage_constructor(sc)
, m_max_uploads((std::numeric_limits<int>::max)())
, m_num_uploads(0)
, m_max_connections((std::numeric_limits<int>::max)())
, m_policy(this)
{
INVARIANT_CHECK;
if (name) m_name.reset(new std::string(name));
if (tracker_url)
{
m_trackers.push_back(announce_entry(tracker_url));
m_torrent_file->add_tracker(tracker_url);
}
}
void torrent::start()
{
boost::weak_ptr<torrent> self(shared_from_this());
if (m_torrent_file->is_valid()) init();
if (m_abort) return;
m_announce_timer.expires_from_now(seconds(1));
m_announce_timer.async_wait(m_ses.m_strand.wrap(
bind(&torrent::on_announce_disp, self, _1)));
}
#ifndef TORRENT_DISABLE_DHT
bool torrent::should_announce_dht() const
{
// don't announce private torrents
if (m_torrent_file->is_valid() && m_torrent_file->priv()) return false;
if (m_trackers.empty()) return true;
return m_failed_trackers > 0 || !m_ses.settings().use_dht_as_fallback;
}
#endif
torrent::~torrent()
{
// The invariant can't be maintained here, since the torrent
// is being destructed, all weak references to it have been
// reset, which means that all its peers already have an
// invalidated torrent pointer (so it cannot be verified to be correct)
// i.e. the invariant can only be maintained if all connections have
// been closed by the time the torrent is destructed. And they are
// supposed to be closed. So we can still do the invariant check.
TORRENT_ASSERT(m_connections.empty());
INVARIANT_CHECK;
#if defined(TORRENT_VERBOSE_LOGGING)
for (peer_iterator i = m_connections.begin();
i != m_connections.end(); ++i)
{
(*(*i)->m_logger) << "*** DESTRUCTING TORRENT\n";
}
#endif
TORRENT_ASSERT(m_abort);
if (!m_connections.empty())
disconnect_all();
}
peer_request torrent::to_req(piece_block const& p)
{
int block_offset = p.block_index * m_block_size;
int block_size = (std::min)((int)torrent_file().piece_size(
p.piece_index) - block_offset, m_block_size);
TORRENT_ASSERT(block_size > 0);
TORRENT_ASSERT(block_size <= m_block_size);
peer_request r;
r.piece = p.piece_index;
r.start = block_offset;
r.length = block_size;
return r;
}
std::string torrent::name() const
{
if (valid_metadata()) return m_torrent_file->name();
if (m_name) return *m_name;
return "";
}
#ifndef TORRENT_DISABLE_EXTENSIONS
void torrent::add_extension(boost::shared_ptr<torrent_plugin> ext)
{
m_extensions.push_back(ext);
}
void torrent::add_extension(boost::function<boost::shared_ptr<torrent_plugin>(torrent*, void*)> const& ext
, void* userdata)
{
boost::shared_ptr<torrent_plugin> tp(ext(this, userdata));
if (!tp) return;
add_extension(tp);
for (peer_iterator i = m_connections.begin();
i != m_connections.end(); ++i)
{
peer_connection* p = *i;
boost::shared_ptr<peer_plugin> pp(tp->new_connection(p));
if (pp) p->add_extension(pp);
}
// if files are checked for this torrent, call the extension
// to let it initialize itself
if (m_connections_initialized)
tp->on_files_checked();
}
#endif
// this may not be called from a constructor because of the call to
// shared_from_this()
void torrent::init()
{
TORRENT_ASSERT(m_torrent_file->is_valid());
TORRENT_ASSERT(m_torrent_file->num_files() > 0);
TORRENT_ASSERT(m_torrent_file->total_size() >= 0);
m_have_pieces.resize(m_torrent_file->num_pieces(), false);
// the shared_from_this() will create an intentional
// cycle of ownership, se the hpp file for description.
m_owning_storage = new piece_manager(shared_from_this(), m_torrent_file
, m_save_path, m_ses.m_files, m_ses.m_disk_thread, m_storage_constructor);
m_storage = m_owning_storage.get();
m_block_size = calculate_block_size(*m_torrent_file, m_default_block_size);
m_picker.reset(new piece_picker(
static_cast<int>(m_torrent_file->piece_length() / m_block_size)
, static_cast<int>((m_torrent_file->total_size()+m_block_size-1)/m_block_size)));
std::vector<std::string> const& url_seeds = m_torrent_file->url_seeds();
std::copy(url_seeds.begin(), url_seeds.end(), std::inserter(m_web_seeds
, m_web_seeds.begin()));
}
void torrent::use_interface(const char* net_interface)
{
INVARIANT_CHECK;
m_net_interface = tcp::endpoint(address::from_string(net_interface), 0);
}
void torrent::on_announce_disp(boost::weak_ptr<torrent> p
, asio::error_code const& e)
{
if (e) return;
boost::shared_ptr<torrent> t = p.lock();
if (!t) return;
t->on_announce();
}
void torrent::on_announce()
#ifndef NDEBUG
try
#endif
{
if (m_abort) return;
boost::weak_ptr<torrent> self(shared_from_this());
if (!m_torrent_file->priv())
{
// announce on local network every 5 minutes
m_announce_timer.expires_from_now(minutes(5));
m_announce_timer.async_wait(m_ses.m_strand.wrap(
bind(&torrent::on_announce_disp, self, _1)));
// announce with the local discovery service
m_ses.announce_lsd(m_torrent_file->info_hash());
}
else
{
m_announce_timer.expires_from_now(minutes(15));
m_announce_timer.async_wait(m_ses.m_strand.wrap(
bind(&torrent::on_announce_disp, self, _1)));
}
#ifndef TORRENT_DISABLE_DHT
if (!m_ses.m_dht) return;
ptime now = time_now();
if (should_announce_dht() && now - m_last_dht_announce > minutes(14))
{
m_last_dht_announce = now;
// TODO: There should be a way to abort an announce operation on the dht.
// when the torrent is destructed
if (m_ses.m_listen_sockets.empty()) return;
m_ses.m_dht->announce(m_torrent_file->info_hash()
, m_ses.m_listen_sockets.front().external_port
, m_ses.m_strand.wrap(bind(&torrent::on_dht_announce_response_disp, self, _1)));
}
#endif
}
#ifndef NDEBUG
catch (std::exception& e)
{
std::cerr << e.what() << std::endl;
TORRENT_ASSERT(false);
};
#endif
#ifndef TORRENT_DISABLE_DHT
void torrent::on_dht_announce_response_disp(boost::weak_ptr<libtorrent::torrent> t
, std::vector<tcp::endpoint> const& peers)
{
boost::shared_ptr<libtorrent::torrent> tor = t.lock();
if (!tor) return;
tor->on_dht_announce_response(peers);
}
void torrent::on_dht_announce_response(std::vector<tcp::endpoint> const& peers)
{
if (peers.empty()) return;
if (m_ses.m_alerts.should_post(alert::info))
{
m_ses.m_alerts.post_alert(tracker_reply_alert(
get_handle(), peers.size(), "Got peers from DHT"));
}
std::for_each(peers.begin(), peers.end(), bind(
&policy::peer_from_tracker, boost::ref(m_policy), _1, peer_id(0)
, peer_info::dht, 0));
}
#endif
// returns true if it is time for this torrent to make another
// tracker request
bool torrent::should_request()
{
INVARIANT_CHECK;
if (m_torrent_file->trackers().empty()) return false;
if (m_just_paused)
{
m_just_paused = false;
return true;
}
return !m_paused && m_next_request < time_now();
}
void torrent::tracker_warning(std::string const& msg)
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
INVARIANT_CHECK;
if (m_ses.m_alerts.should_post(alert::warning))
{
m_ses.m_alerts.post_alert(tracker_warning_alert(get_handle(), msg));
}
}
void torrent::tracker_response(
tracker_request const&
, std::vector<peer_entry>& peer_list
, int interval
, int complete
, int incomplete)
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
INVARIANT_CHECK;
m_failed_trackers = 0;
// announce intervals less than 5 minutes
// are insane.
if (interval < 60 * 5) interval = 60 * 5;
m_last_working_tracker
= prioritize_tracker(m_currently_trying_tracker);
m_currently_trying_tracker = 0;
m_duration = interval;
m_next_request = time_now() + seconds(m_duration);
if (complete >= 0) m_complete = complete;
if (incomplete >= 0) m_incomplete = incomplete;
// connect to random peers from the list
std::random_shuffle(peer_list.begin(), peer_list.end());
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
std::stringstream s;
s << "TRACKER RESPONSE:\n"
"interval: " << m_duration << "\n"
"peers:\n";
for (std::vector<peer_entry>::const_iterator i = peer_list.begin();
i != peer_list.end(); ++i)
{
s << " " << std::setfill(' ') << std::setw(16) << i->ip
<< " " << std::setw(5) << std::dec << i->port << " ";
if (!i->pid.is_all_zeros()) s << " " << i->pid << " " << identify_client(i->pid);
s << "\n";
}
debug_log(s.str());
#endif
// for each of the peers we got from the tracker
for (std::vector<peer_entry>::iterator i = peer_list.begin();
i != peer_list.end(); ++i)
{
// don't make connections to ourself
if (i->pid == m_ses.get_peer_id())
continue;
try
{
tcp::endpoint a(address::from_string(i->ip), i->port);
if (m_ses.m_ip_filter.access(a.address()) & ip_filter::blocked)
{
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
debug_log("blocked ip from tracker: " + i->ip);
#endif
if (m_ses.m_alerts.should_post(alert::info))
{
m_ses.m_alerts.post_alert(peer_blocked_alert(a.address()
, "peer from tracker blocked by IP filter"));
}
continue;
}
m_policy.peer_from_tracker(a, i->pid, peer_info::tracker, 0);
}
catch (std::exception&)
{
// assume this is because we got a hostname instead of
// an ip address from the tracker
tcp::resolver::query q(i->ip, boost::lexical_cast<std::string>(i->port));
m_host_resolver.async_resolve(q, m_ses.m_strand.wrap(
bind(&torrent::on_peer_name_lookup, shared_from_this(), _1, _2, i->pid)));
}
}
if (m_ses.m_alerts.should_post(alert::info))
{
std::stringstream s;
s << "Got response from tracker: "
<< m_trackers[m_last_working_tracker].url;
m_ses.m_alerts.post_alert(tracker_reply_alert(
get_handle(), peer_list.size(), s.str()));
}
m_got_tracker_response = true;
}
void torrent::on_peer_name_lookup(asio::error_code const& e, tcp::resolver::iterator host
, peer_id pid) try
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
INVARIANT_CHECK;
if (e || host == tcp::resolver::iterator() ||
m_ses.is_aborted()) return;
if (m_ses.m_ip_filter.access(host->endpoint().address()) & ip_filter::blocked)
{
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
debug_log("blocked ip from tracker: " + host->endpoint().address().to_string());
#endif
if (m_ses.m_alerts.should_post(alert::info))
{
m_ses.m_alerts.post_alert(peer_blocked_alert(host->endpoint().address()
, "peer from tracker blocked by IP filter"));
}
return;
}
m_policy.peer_from_tracker(*host, pid, peer_info::tracker, 0);
}
catch (std::exception&)
{};
size_type torrent::bytes_left() const
{
// if we don't have the metadata yet, we
// cannot tell how big the torrent is.
if (!valid_metadata()) return -1;
return m_torrent_file->total_size()
- quantized_bytes_done();
}
size_type torrent::quantized_bytes_done() const
{
// INVARIANT_CHECK;
if (!valid_metadata()) return 0;
if (m_torrent_file->num_pieces() == 0)
return 0;
if (is_seed()) return m_torrent_file->total_size();
const int last_piece = m_torrent_file->num_pieces() - 1;
size_type total_done
= m_num_pieces * m_torrent_file->piece_length();
// if we have the last piece, we have to correct
// the amount we have, since the first calculation
// assumed all pieces were of equal size
if (m_have_pieces[last_piece])
{
int corr = m_torrent_file->piece_size(last_piece)
- m_torrent_file->piece_length();
total_done += corr;
}
return total_done;
}
// the first value is the total number of bytes downloaded
// the second value is the number of bytes of those that haven't
// been filtered as not wanted we have downloaded
tuple<size_type, size_type> torrent::bytes_done() const
{
INVARIANT_CHECK;
if (!valid_metadata() || m_torrent_file->num_pieces() == 0)
return tuple<size_type, size_type>(0,0);
const int last_piece = m_torrent_file->num_pieces() - 1;
if (is_seed())
return make_tuple(m_torrent_file->total_size()
, m_torrent_file->total_size());
size_type wanted_done = (m_num_pieces - m_picker->num_have_filtered())
* m_torrent_file->piece_length();
size_type total_done
= m_num_pieces * m_torrent_file->piece_length();
TORRENT_ASSERT(m_num_pieces < m_torrent_file->num_pieces());
// if we have the last piece, we have to correct
// the amount we have, since the first calculation
// assumed all pieces were of equal size
if (m_have_pieces[last_piece])
{
int corr = m_torrent_file->piece_size(last_piece)
- m_torrent_file->piece_length();
total_done += corr;
if (m_picker->piece_priority(last_piece) != 0)
wanted_done += corr;
}
TORRENT_ASSERT(total_done <= m_torrent_file->total_size());
TORRENT_ASSERT(wanted_done <= m_torrent_file->total_size());
const std::vector<piece_picker::downloading_piece>& dl_queue
= m_picker->get_download_queue();
const int blocks_per_piece = static_cast<int>(
m_torrent_file->piece_length() / m_block_size);
for (std::vector<piece_picker::downloading_piece>::const_iterator i =
dl_queue.begin(); i != dl_queue.end(); ++i)
{
int corr = 0;
int index = i->index;
if (m_have_pieces[index]) continue;
TORRENT_ASSERT(i->finished <= m_picker->blocks_in_piece(index));
#ifndef NDEBUG
for (std::vector<piece_picker::downloading_piece>::const_iterator j = boost::next(i);
j != dl_queue.end(); ++j)
{
TORRENT_ASSERT(j->index != index);
}
#endif
for (int j = 0; j < blocks_per_piece; ++j)
{
TORRENT_ASSERT(m_picker->is_finished(piece_block(index, j)) == (i->info[j].state == piece_picker::block_info::state_finished));
corr += (i->info[j].state == piece_picker::block_info::state_finished) * m_block_size;
TORRENT_ASSERT(index != last_piece || j < m_picker->blocks_in_last_piece()
|| i->info[j].state != piece_picker::block_info::state_finished);
}
// correction if this was the last piece
// and if we have the last block
if (i->index == last_piece
&& i->info[m_picker->blocks_in_last_piece()-1].state
== piece_picker::block_info::state_finished)
{
corr -= m_block_size;
corr += m_torrent_file->piece_size(last_piece) % m_block_size;
}
total_done += corr;
if (m_picker->piece_priority(index) != 0)
wanted_done += corr;
}
TORRENT_ASSERT(total_done <= m_torrent_file->total_size());
TORRENT_ASSERT(wanted_done <= m_torrent_file->total_size());
std::map<piece_block, int> downloading_piece;
for (const_peer_iterator i = begin(); i != end(); ++i)
{
peer_connection* pc = *i;
boost::optional<piece_block_progress> p
= pc->downloading_piece_progress();
if (p)
{
if (m_have_pieces[p->piece_index])
continue;
piece_block block(p->piece_index, p->block_index);
if (m_picker->is_finished(block))
continue;
std::map<piece_block, int>::iterator dp
= downloading_piece.find(block);
if (dp != downloading_piece.end())
{
if (dp->second < p->bytes_downloaded)
dp->second = p->bytes_downloaded;
}
else
{
downloading_piece[block] = p->bytes_downloaded;
}
#ifndef NDEBUG
TORRENT_ASSERT(p->bytes_downloaded <= p->full_block_bytes);
int last_piece = m_torrent_file->num_pieces() - 1;
if (p->piece_index == last_piece
&& p->block_index == m_torrent_file->piece_size(last_piece) / block_size())
TORRENT_ASSERT(p->full_block_bytes == m_torrent_file->piece_size(last_piece) % block_size());
else
TORRENT_ASSERT(p->full_block_bytes == block_size());
#endif
}
}
for (std::map<piece_block, int>::iterator i = downloading_piece.begin();
i != downloading_piece.end(); ++i)
{
total_done += i->second;
if (m_picker->piece_priority(i->first.piece_index) != 0)
wanted_done += i->second;
}
#ifndef NDEBUG
if (total_done >= m_torrent_file->total_size())
{
// Thist happens when a piece has been downloaded completely
// but not yet verified against the hash
std::copy(m_have_pieces.begin(), m_have_pieces.end()
, std::ostream_iterator<bool>(std::cerr, " "));
std::cerr << std::endl;
std::cerr << "num_pieces: " << m_num_pieces << std::endl;
std::cerr << "unfinished:" << std::endl;
for (std::vector<piece_picker::downloading_piece>::const_iterator i =
dl_queue.begin(); i != dl_queue.end(); ++i)
{
std::cerr << " " << i->index << " ";
for (int j = 0; j < blocks_per_piece; ++j)
{
std::cerr << (i->info[j].state == piece_picker::block_info::state_finished ? "1" : "0");
}
std::cerr << std::endl;
}
std::cerr << "downloading pieces:" << std::endl;
for (std::map<piece_block, int>::iterator i = downloading_piece.begin();
i != downloading_piece.end(); ++i)
{
std::cerr << " " << i->first.piece_index << ":" << i->first.block_index
<< " " << i->second << std::endl;
}
}
TORRENT_ASSERT(total_done <= m_torrent_file->total_size());
TORRENT_ASSERT(wanted_done <= m_torrent_file->total_size());
#endif
TORRENT_ASSERT(total_done >= wanted_done);
return make_tuple(total_done, wanted_done);
}
void torrent::piece_finished(int index, bool passed_hash_check)
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_ses.m_logger) << time_now_string() << " *** PIECE_FINISHED [ p: "
<< index << " chk: " << (passed_hash_check?"passed":"failed") << " ]\n";
#endif
bool was_seed = is_seed();
bool was_finished = m_picker->num_filtered() + num_pieces()
== torrent_file().num_pieces();
if (passed_hash_check)
{
if (m_ses.m_alerts.should_post(alert::debug))
{
m_ses.m_alerts.post_alert(piece_finished_alert(get_handle()
, index, "piece finished"));
}
// the following call may cause picker to become invalid
// in case we just became a seed
announce_piece(index);
TORRENT_ASSERT(valid_metadata());
// if we just became a seed, picker is now invalid, since it
// is deallocated by the torrent once it starts seeding
if (!was_finished
&& (is_seed()
|| m_picker->num_filtered() + num_pieces()
== torrent_file().num_pieces()))
{
// torrent finished
// i.e. all the pieces we're interested in have
// been downloaded. Release the files (they will open
// in read only mode if needed)
try { finished(); }
catch (std::exception& e)
{
#ifndef NDEBUG
std::cerr << e.what() << std::endl;
TORRENT_ASSERT(false);
#endif
}
}
}
else
{
piece_failed(index);
}
#ifndef NDEBUG
try
{
#endif
m_policy.piece_finished(index, passed_hash_check);
#ifndef NDEBUG
}
catch (std::exception const& e)
{
std::cerr << e.what() << std::endl;
TORRENT_ASSERT(false);
}
#endif
#ifndef NDEBUG
try
{
#endif
if (!was_seed && is_seed())
{
TORRENT_ASSERT(passed_hash_check);
completed();
}
#ifndef NDEBUG
}
catch (std::exception const& e)
{
std::cerr << e.what() << std::endl;
TORRENT_ASSERT(false);
}
#endif
}
void torrent::piece_failed(int index)
{
// if the last piece fails the peer connection will still
// think that it has received all of it until this function
// resets the download queue. So, we cannot do the
// invariant check here since it assumes:
// (total_done == m_torrent_file->total_size()) => is_seed()
INVARIANT_CHECK;
TORRENT_ASSERT(m_storage);
TORRENT_ASSERT(m_storage->refcount() > 0);
TORRENT_ASSERT(m_picker.get());
TORRENT_ASSERT(index >= 0);
TORRENT_ASSERT(index < m_torrent_file->num_pieces());
if (m_ses.m_alerts.should_post(alert::info))
{
std::stringstream s;
s << "hash for piece " << index << " failed";
m_ses.m_alerts.post_alert(hash_failed_alert(get_handle(), index, s.str()));
}
// increase the total amount of failed bytes
m_total_failed_bytes += m_torrent_file->piece_size(index);
std::vector<void*> downloaders;
m_picker->get_downloaders(downloaders, index);
// decrease the trust point of all peers that sent
// parts of this piece.
// first, build a set of all peers that participated
std::set<void*> peers;
std::copy(downloaders.begin(), downloaders.end(), std::inserter(peers, peers.begin()));
#ifndef TORRENT_DISABLE_EXTENSIONS
for (extension_list_t::iterator i = m_extensions.begin()
, end(m_extensions.end()); i != end; ++i)
{
try { (*i)->on_piece_failed(index); } catch (std::exception&) {}
}
#endif
for (std::set<void*>::iterator i = peers.begin()
, end(peers.end()); i != end; ++i)
{
policy::peer* p = static_cast<policy::peer*>(*i);
if (p == 0) continue;
if (p->connection) p->connection->received_invalid_data(index);
// either, we have received too many failed hashes
// or this was the only peer that sent us this piece.
// TODO: make this a changable setting
if (p->trust_points <= -7
|| peers.size() == 1)
{
// we don't trust this peer anymore
// ban it.
if (m_ses.m_alerts.should_post(alert::info))
{
m_ses.m_alerts.post_alert(peer_ban_alert(
p->ip
, get_handle()
, "banning peer because of too many corrupt pieces"));
}
// mark the peer as banned
p->banned = true;
if (p->connection)
{
#if defined(TORRENT_VERBOSE_LOGGING)
(*p->connection->m_logger) << "*** BANNING PEER [ " << p->ip
<< " ] 'too many corrupt pieces'\n";
#endif
p->connection->disconnect();
}
}
}
// we have to let the piece_picker know that
// this piece failed the check as it can restore it
// and mark it as being interesting for download
// TODO: do this more intelligently! and keep track
// of how much crap (data that failed hash-check) and
// how much redundant data we have downloaded
// if some clients has sent more than one piece
// start with redownloading the pieces that the client
// that has sent the least number of pieces
m_picker->restore_piece(index);
TORRENT_ASSERT(m_storage);
m_storage->mark_failed(index);
TORRENT_ASSERT(m_have_pieces[index] == false);
}
void torrent::abort()
{
INVARIANT_CHECK;
m_abort = true;
// if the torrent is paused, it doesn't need
// to announce with even=stopped again.
if (!m_paused)
m_event = tracker_request::stopped;
// disconnect all peers and close all
// files belonging to the torrents
#if defined(TORRENT_VERBOSE_LOGGING)
for (peer_iterator i = m_connections.begin();
i != m_connections.end(); ++i)
{
(*(*i)->m_logger) << "*** ABORTING TORRENT\n";
}
#endif
disconnect_all();
if (m_owning_storage.get())
m_storage->async_release_files(
bind(&torrent::on_files_released, shared_from_this(), _1, _2));
m_owning_storage = 0;
m_announce_timer.cancel();
m_host_resolver.cancel();
}
void torrent::on_files_deleted(int ret, disk_io_job const& j)
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
if (alerts().should_post(alert::warning))
{
alerts().post_alert(torrent_deleted_alert(get_handle(), "files deleted"));
}
}
void torrent::on_files_released(int ret, disk_io_job const& j)
{
/*
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
if (alerts().should_post(alert::warning))
{
alerts().post_alert(torrent_paused_alert(get_handle(), "torrent paused"));
}
*/
}
void torrent::on_torrent_paused(int ret, disk_io_job const& j)
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
if (alerts().should_post(alert::warning))
{
alerts().post_alert(torrent_paused_alert(get_handle(), "torrent paused"));
}
}
void torrent::announce_piece(int index)
{
// INVARIANT_CHECK;
TORRENT_ASSERT(index >= 0);
TORRENT_ASSERT(index < m_torrent_file->num_pieces());
std::vector<void*> downloaders;
m_picker->get_downloaders(downloaders, index);
// increase the trust point of all peers that sent
// parts of this piece.
std::set<void*> peers;
std::copy(downloaders.begin(), downloaders.end(), std::inserter(peers, peers.begin()));
if (!m_have_pieces[index])
m_num_pieces++;
m_have_pieces[index] = true;
TORRENT_ASSERT(std::accumulate(m_have_pieces.begin(), m_have_pieces.end(), 0)
== m_num_pieces);
m_picker->we_have(index);
for (peer_iterator i = m_connections.begin(); i != m_connections.end(); ++i)
try { (*i)->announce_piece(index); } catch (std::exception&) {}
for (std::set<void*>::iterator i = peers.begin()
, end(peers.end()); i != end; ++i)
{
policy::peer* p = static_cast<policy::peer*>(*i);
if (p == 0) continue;
p->on_parole = false;
++p->trust_points;
// TODO: make this limit user settable
if (p->trust_points > 20) p->trust_points = 20;
if (p->connection) p->connection->received_valid_data(index);
}
#ifndef TORRENT_DISABLE_EXTENSIONS
for (extension_list_t::iterator i = m_extensions.begin()
, end(m_extensions.end()); i != end; ++i)
{
try { (*i)->on_piece_pass(index); } catch (std::exception&) {}
}
#endif
if (is_seed())
{
m_picker.reset();
m_torrent_file->seed_free();
}
}
std::string torrent::tracker_login() const
{
if (m_username.empty() && m_password.empty()) return "";
return m_username + ":" + m_password;
}
void torrent::piece_availability(std::vector<int>& avail) const
{
INVARIANT_CHECK;
TORRENT_ASSERT(valid_metadata());
if (is_seed())
{
avail.clear();
return;
}
m_picker->get_availability(avail);
}
void torrent::set_piece_priority(int index, int priority)
{
// INVARIANT_CHECK;
TORRENT_ASSERT(valid_metadata());
if (is_seed()) return;
// this call is only valid on torrents with metadata
TORRENT_ASSERT(m_picker.get());
TORRENT_ASSERT(index >= 0);
TORRENT_ASSERT(index < m_torrent_file->num_pieces());
bool filter_updated = m_picker->set_piece_priority(index, priority);
if (filter_updated) update_peer_interest();
}
int torrent::piece_priority(int index) const
{
// INVARIANT_CHECK;
TORRENT_ASSERT(valid_metadata());
if (is_seed()) return 1;
// this call is only valid on torrents with metadata
TORRENT_ASSERT(m_picker.get());
TORRENT_ASSERT(index >= 0);
TORRENT_ASSERT(index < m_torrent_file->num_pieces());
return m_picker->piece_priority(index);
}
void torrent::prioritize_pieces(std::vector<int> const& pieces)
{
INVARIANT_CHECK;
// this call is only valid on torrents with metadata
TORRENT_ASSERT(valid_metadata());
if (is_seed()) return;
TORRENT_ASSERT(m_picker.get());
int index = 0;
bool filter_updated = false;
for (std::vector<int>::const_iterator i = pieces.begin()
, end(pieces.end()); i != end; ++i, ++index)
{
TORRENT_ASSERT(*i >= 0);
TORRENT_ASSERT(*i <= 7);
filter_updated |= m_picker->set_piece_priority(index, *i);
}
if (filter_updated) update_peer_interest();
}
void torrent::piece_priorities(std::vector<int>& pieces) const
{
INVARIANT_CHECK;
// this call is only valid on torrents with metadata
TORRENT_ASSERT(valid_metadata());
if (is_seed())
{
pieces.clear();
pieces.resize(m_torrent_file->num_pieces(), 1);
return;
}
TORRENT_ASSERT(m_picker.get());
m_picker->piece_priorities(pieces);
}
namespace
{
void set_if_greater(int& piece_prio, int file_prio)
{
if (file_prio > piece_prio) piece_prio = file_prio;
}
}
void torrent::prioritize_files(std::vector<int> const& files)
{
INVARIANT_CHECK;
// this call is only valid on torrents with metadata
if (!valid_metadata() || is_seed()) return;
// the bitmask need to have exactly one bit for every file
// in the torrent
TORRENT_ASSERT(int(files.size()) == m_torrent_file->num_files());
size_type position = 0;
if (m_torrent_file->num_pieces() == 0) return;
int piece_length = m_torrent_file->piece_length();
// initialize the piece priorities to 0, then only allow
// setting higher priorities
std::vector<int> pieces(m_torrent_file->num_pieces(), 0);
for (int i = 0; i < int(files.size()); ++i)
{
size_type start = position;
size_type size = m_torrent_file->file_at(i).size;
if (size == 0) continue;
position += size;
// mark all pieces of the file with this file's priority
// but only if the priority is higher than the pieces
// already set (to avoid problems with overlapping pieces)
int start_piece = int(start / piece_length);
int last_piece = int((position - 1) / piece_length);
TORRENT_ASSERT(last_piece <= int(pieces.size()));
// if one piece spans several files, we might
// come here several times with the same start_piece, end_piece
std::for_each(pieces.begin() + start_piece
, pieces.begin() + last_piece + 1
, bind(&set_if_greater, _1, files[i]));
}
prioritize_pieces(pieces);
update_peer_interest();
}
// updates the interested flag in peers
void torrent::update_peer_interest()
{
for (peer_iterator i = begin(); i != end(); ++i)
(*i)->update_interest();
}
void torrent::filter_piece(int index, bool filter)
{
INVARIANT_CHECK;
TORRENT_ASSERT(valid_metadata());
if (is_seed()) return;
// this call is only valid on torrents with metadata
TORRENT_ASSERT(m_picker.get());
TORRENT_ASSERT(index >= 0);
TORRENT_ASSERT(index < m_torrent_file->num_pieces());
m_picker->set_piece_priority(index, filter ? 1 : 0);
update_peer_interest();
}
void torrent::filter_pieces(std::vector<bool> const& bitmask)
{
INVARIANT_CHECK;
// this call is only valid on torrents with metadata
TORRENT_ASSERT(valid_metadata());
if (is_seed()) return;
TORRENT_ASSERT(m_picker.get());
int index = 0;
for (std::vector<bool>::const_iterator i = bitmask.begin()
, end(bitmask.end()); i != end; ++i, ++index)
{
if ((m_picker->piece_priority(index) == 0) == *i) continue;
if (*i)
m_picker->set_piece_priority(index, 0);
else
m_picker->set_piece_priority(index, 1);
}
update_peer_interest();
}
bool torrent::is_piece_filtered(int index) const
{
// this call is only valid on torrents with metadata
TORRENT_ASSERT(valid_metadata());
if (is_seed()) return false;
TORRENT_ASSERT(m_picker.get());
TORRENT_ASSERT(index >= 0);
TORRENT_ASSERT(index < m_torrent_file->num_pieces());
return m_picker->piece_priority(index) == 0;
}
void torrent::filtered_pieces(std::vector<bool>& bitmask) const
{
INVARIANT_CHECK;
// this call is only valid on torrents with metadata
TORRENT_ASSERT(valid_metadata());
if (is_seed())
{
bitmask.clear();
bitmask.resize(m_torrent_file->num_pieces(), false);
return;
}
TORRENT_ASSERT(m_picker.get());
m_picker->filtered_pieces(bitmask);
}
void torrent::filter_files(std::vector<bool> const& bitmask)
{
INVARIANT_CHECK;
// this call is only valid on torrents with metadata
if (!valid_metadata() || is_seed()) return;
// the bitmask need to have exactly one bit for every file
// in the torrent
TORRENT_ASSERT((int)bitmask.size() == m_torrent_file->num_files());
size_type position = 0;
if (m_torrent_file->num_pieces())
{
int piece_length = m_torrent_file->piece_length();
// mark all pieces as filtered, then clear the bits for files
// that should be downloaded
std::vector<bool> piece_filter(m_torrent_file->num_pieces(), true);
for (int i = 0; i < (int)bitmask.size(); ++i)
{
size_type start = position;
position += m_torrent_file->file_at(i).size;
// is the file selected for download?
if (!bitmask[i])
{
// mark all pieces of the file as downloadable
int start_piece = int(start / piece_length);
int last_piece = int(position / piece_length);
// if one piece spans several files, we might
// come here several times with the same start_piece, end_piece
std::fill(piece_filter.begin() + start_piece, piece_filter.begin()
+ last_piece + 1, false);
}
}
filter_pieces(piece_filter);
}
}
void torrent::replace_trackers(std::vector<announce_entry> const& urls)
{
TORRENT_ASSERT(!urls.empty());
m_trackers = urls;
if (m_currently_trying_tracker >= (int)m_trackers.size())
m_currently_trying_tracker = (int)m_trackers.size()-1;
m_last_working_tracker = -1;
}
tracker_request torrent::generate_tracker_request()
{
INVARIANT_CHECK;
TORRENT_ASSERT(!m_trackers.empty());
m_next_request = time_now() + seconds(tracker_retry_delay_max);
tracker_request req;
req.info_hash = m_torrent_file->info_hash();
req.pid = m_ses.get_peer_id();
req.downloaded = m_stat.total_payload_download();
req.uploaded = m_stat.total_payload_upload();
req.left = bytes_left();
if (req.left == -1) req.left = 16*1024;
req.event = m_event;
tcp::endpoint ep = m_ses.get_ipv6_interface();
if (ep != tcp::endpoint())
req.ipv6 = ep.address().to_string();
if (m_event != tracker_request::stopped)
m_event = tracker_request::none;
req.url = m_trackers[m_currently_trying_tracker].url;
req.num_want = m_settings.num_want;
// if we are aborting. we don't want any new peers
if (req.event == tracker_request::stopped)
req.num_want = 0;
// default initialize, these should be set by caller
// before passing the request to the tracker_manager
req.listen_port = 0;
req.key = 0;
return req;
}
void torrent::choke_peer(peer_connection& c)
{
INVARIANT_CHECK;
TORRENT_ASSERT(!c.is_choked());
TORRENT_ASSERT(m_num_uploads > 0);
c.send_choke();
--m_num_uploads;
}
bool torrent::unchoke_peer(peer_connection& c)
{
INVARIANT_CHECK;
TORRENT_ASSERT(c.is_choked());
if (m_num_uploads >= m_max_uploads) return false;
c.send_unchoke();
++m_num_uploads;
return true;
}
void torrent::cancel_block(piece_block block)
{
for (peer_iterator i = m_connections.begin()
, end(m_connections.end()); i != end; ++i)
{
(*i)->cancel_request(block);
}
}
void torrent::remove_peer(peer_connection* p) try
{
// INVARIANT_CHECK;
TORRENT_ASSERT(p != 0);
peer_iterator i = m_connections.find(p);
if (i == m_connections.end())
{
TORRENT_ASSERT(false);
return;
}
if (ready_for_connections())
{
TORRENT_ASSERT(p->associated_torrent().lock().get() == this);
if (p->is_seed())
{
if (m_picker.get())
{
TORRENT_ASSERT(!is_seed());
m_picker->dec_refcount_all();
}
}
else
{
// if we're a seed, we don't keep track of piece availability
if (!is_seed())
{
const std::vector<bool>& pieces = p->get_bitfield();
for (std::vector<bool>::const_iterator i = pieces.begin();
i != pieces.end(); ++i)
{
if (*i) peer_lost(static_cast<int>(i - pieces.begin()));
}
}
}
}
if (!p->is_choked())
--m_num_uploads;
m_policy.connection_closed(*p);
p->set_peer_info(0);
TORRENT_ASSERT(i != m_connections.end());
m_connections.erase(i);
}
catch (std::exception& e)
{
#ifndef NDEBUG
std::string err = e.what();
#endif
TORRENT_ASSERT(false);
};
void torrent::connect_to_url_seed(std::string const& url)
{
INVARIANT_CHECK;
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_ses.m_logger) << time_now_string() << " resolving web seed: " << url << "\n";
#endif
m_resolving_web_seeds.insert(url);
proxy_settings const& ps = m_ses.web_seed_proxy();
if (ps.type == proxy_settings::http
|| ps.type == proxy_settings::http_pw)
{
// use proxy
tcp::resolver::query q(ps.hostname
, boost::lexical_cast<std::string>(ps.port));
m_host_resolver.async_resolve(q, m_ses.m_strand.wrap(
bind(&torrent::on_proxy_name_lookup, shared_from_this(), _1, _2, url)));
}
else
{
std::string protocol;
std::string auth;
std::string hostname;
int port;
std::string path;
boost::tie(protocol, auth, hostname, port, path)
= parse_url_components(url);
// TODO: should auth be used here?
tcp::resolver::query q(hostname, boost::lexical_cast<std::string>(port));
m_host_resolver.async_resolve(q, m_ses.m_strand.wrap(
bind(&torrent::on_name_lookup, shared_from_this(), _1, _2, url
, tcp::endpoint())));
}
}
void torrent::on_proxy_name_lookup(asio::error_code const& e, tcp::resolver::iterator host
, std::string url) try
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
INVARIANT_CHECK;
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_ses.m_logger) << time_now_string() << " completed resolve proxy hostname for: " << url << "\n";
#endif
if (e || host == tcp::resolver::iterator())
{
if (m_ses.m_alerts.should_post(alert::warning))
{
std::stringstream msg;
msg << "HTTP seed proxy hostname lookup failed: " << e.message();
m_ses.m_alerts.post_alert(
url_seed_alert(get_handle(), url, msg.str()));
}
// the name lookup failed for the http host. Don't try
// this host again
remove_url_seed(url);
return;
}
if (m_ses.is_aborted()) return;
tcp::endpoint a(host->endpoint());
using boost::tuples::ignore;
std::string hostname;
int port;
boost::tie(ignore, ignore, hostname, port, ignore)
= parse_url_components(url);
if (m_ses.m_ip_filter.access(a.address()) & ip_filter::blocked)
{
if (m_ses.m_alerts.should_post(alert::info))
{
m_ses.m_alerts.post_alert(peer_blocked_alert(a.address()
, "proxy (" + hostname + ") blocked by IP filter"));
}
return;
}
tcp::resolver::query q(hostname, boost::lexical_cast<std::string>(port));
m_host_resolver.async_resolve(q, m_ses.m_strand.wrap(
bind(&torrent::on_name_lookup, shared_from_this(), _1, _2, url, a)));
}
catch (std::exception& exc)
{
TORRENT_ASSERT(false);
};
void torrent::on_name_lookup(asio::error_code const& e, tcp::resolver::iterator host
, std::string url, tcp::endpoint proxy) try
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
INVARIANT_CHECK;
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_ses.m_logger) << time_now_string() << " completed resolve: " << url << "\n";
#endif
std::set<std::string>::iterator i = m_resolving_web_seeds.find(url);
if (i != m_resolving_web_seeds.end()) m_resolving_web_seeds.erase(i);
if (e || host == tcp::resolver::iterator())
{
if (m_ses.m_alerts.should_post(alert::warning))
{
std::stringstream msg;
msg << "HTTP seed hostname lookup failed: " << e.message();
m_ses.m_alerts.post_alert(
url_seed_alert(get_handle(), url, msg.str()));
}
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_ses.m_logger) << " ** HOSTNAME LOOKUP FAILED!**: " << url << "\n";
#endif
// the name lookup failed for the http host. Don't try
// this host again
remove_url_seed(url);
return;
}
if (m_ses.is_aborted()) return;
tcp::endpoint a(host->endpoint());
if (m_ses.m_ip_filter.access(a.address()) & ip_filter::blocked)
{
if (m_ses.m_alerts.should_post(alert::info))
{
m_ses.m_alerts.post_alert(peer_blocked_alert(a.address()
, "web seed (" + url + ") blocked by IP filter"));
}
return;
}
boost::shared_ptr<socket_type> s(new socket_type);
bool ret = instantiate_connection(m_ses.m_io_service, m_ses.web_seed_proxy(), *s);
TORRENT_ASSERT(ret);
if (m_ses.web_seed_proxy().type == proxy_settings::http
|| m_ses.web_seed_proxy().type == proxy_settings::http_pw)
{
// the web seed connection will talk immediately to
// the proxy, without requiring CONNECT support
s->get<http_stream>().set_no_connect(true);
}
boost::intrusive_ptr<peer_connection> c(new web_peer_connection(
m_ses, shared_from_this(), s, a, url, 0));
#ifndef NDEBUG
c->m_in_constructor = false;
#endif
#ifndef TORRENT_DISABLE_EXTENSIONS
for (extension_list_t::iterator i = m_extensions.begin()
, end(m_extensions.end()); i != end; ++i)
{
boost::shared_ptr<peer_plugin> pp((*i)->new_connection(c.get()));
if (pp) c->add_extension(pp);
}
#endif
try
{
// add the newly connected peer to this torrent's peer list
m_connections.insert(boost::get_pointer(c));
m_ses.m_connections.insert(c);
m_ses.m_half_open.enqueue(
bind(&peer_connection::connect, c, _1)
, bind(&peer_connection::timed_out, c)
, seconds(settings().peer_connect_timeout));
}
catch (std::exception& e)
{
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_ses.m_logger) << " ** HOSTNAME LOOKUP FAILED!**: " << e.what() << "\n";
#endif
// TODO: post an error alert!
// std::map<tcp::endpoint, peer_connection*>::iterator i = m_connections.find(a);
// if (i != m_connections.end()) m_connections.erase(i);
m_ses.connection_failed(c, a, e.what());
c->disconnect();
}
}
catch (std::exception& exc)
{
#ifndef NDEBUG
std::cerr << exc.what() << std::endl;
#endif
TORRENT_ASSERT(false);
};
#ifndef TORRENT_DISABLE_RESOLVE_COUNTRIES
namespace
{
unsigned long swap_bytes(unsigned long a)
{
return (a >> 24) | ((a & 0xff0000) >> 8) | ((a & 0xff00) << 8) | (a << 24);
}
}
void torrent::resolve_peer_country(boost::intrusive_ptr<peer_connection> const& p) const
{
if (m_resolving_country
|| p->has_country()
|| p->is_connecting()
|| p->is_queued()
|| p->in_handshake()
|| p->remote().address().is_v6()) return;
m_resolving_country = true;
asio::ip::address_v4 reversed(swap_bytes(p->remote().address().to_v4().to_ulong()));
tcp::resolver::query q(reversed.to_string() + ".zz.countries.nerd.dk", "0");
m_host_resolver.async_resolve(q, m_ses.m_strand.wrap(
bind(&torrent::on_country_lookup, shared_from_this(), _1, _2, p)));
}
namespace
{
struct country_entry
{
int code;
char const* name;
};
}
void torrent::on_country_lookup(asio::error_code const& error, tcp::resolver::iterator i
, intrusive_ptr<peer_connection> p) const
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
INVARIANT_CHECK;
m_resolving_country = false;
// must be ordered in increasing order
static const country_entry country_map[] =
{
{ 4, "AF"}, { 8, "AL"}, { 10, "AQ"}, { 12, "DZ"}, { 16, "AS"}
, { 20, "AD"}, { 24, "AO"}, { 28, "AG"}, { 31, "AZ"}, { 32, "AR"}
, { 36, "AU"}, { 40, "AT"}, { 44, "BS"}, { 48, "BH"}, { 50, "BD"}
, { 51, "AM"}, { 52, "BB"}, { 56, "BE"}, { 60, "BM"}, { 64, "BT"}
, { 68, "BO"}, { 70, "BA"}, { 72, "BW"}, { 74, "BV"}, { 76, "BR"}
, { 84, "BZ"}, { 86, "IO"}, { 90, "SB"}, { 92, "VG"}, { 96, "BN"}
, {100, "BG"}, {104, "MM"}, {108, "BI"}, {112, "BY"}, {116, "KH"}
, {120, "CM"}, {124, "CA"}, {132, "CV"}, {136, "KY"}, {140, "CF"}
, {144, "LK"}, {148, "TD"}, {152, "CL"}, {156, "CN"}, {158, "TW"}
, {162, "CX"}, {166, "CC"}, {170, "CO"}, {174, "KM"}, {175, "YT"}
, {178, "CG"}, {180, "CD"}, {184, "CK"}, {188, "CR"}, {191, "HR"}
, {192, "CU"}, {203, "CZ"}, {204, "BJ"}, {208, "DK"}, {212, "DM"}
, {214, "DO"}, {218, "EC"}, {222, "SV"}, {226, "GQ"}, {231, "ET"}
, {232, "ER"}, {233, "EE"}, {234, "FO"}, {238, "FK"}, {239, "GS"}
, {242, "FJ"}, {246, "FI"}, {248, "AX"}, {250, "FR"}, {254, "GF"}
, {258, "PF"}, {260, "TF"}, {262, "DJ"}, {266, "GA"}, {268, "GE"}
, {270, "GM"}, {275, "PS"}, {276, "DE"}, {288, "GH"}, {292, "GI"}
, {296, "KI"}, {300, "GR"}, {304, "GL"}, {308, "GD"}, {312, "GP"}
, {316, "GU"}, {320, "GT"}, {324, "GN"}, {328, "GY"}, {332, "HT"}
, {334, "HM"}, {336, "VA"}, {340, "HN"}, {344, "HK"}, {348, "HU"}
, {352, "IS"}, {356, "IN"}, {360, "ID"}, {364, "IR"}, {368, "IQ"}
, {372, "IE"}, {376, "IL"}, {380, "IT"}, {384, "CI"}, {388, "JM"}
, {392, "JP"}, {398, "KZ"}, {400, "JO"}, {404, "KE"}, {408, "KP"}
, {410, "KR"}, {414, "KW"}, {417, "KG"}, {418, "LA"}, {422, "LB"}
, {426, "LS"}, {428, "LV"}, {430, "LR"}, {434, "LY"}, {438, "LI"}
, {440, "LT"}, {442, "LU"}, {446, "MO"}, {450, "MG"}, {454, "MW"}
, {458, "MY"}, {462, "MV"}, {466, "ML"}, {470, "MT"}, {474, "MQ"}
, {478, "MR"}, {480, "MU"}, {484, "MX"}, {492, "MC"}, {496, "MN"}
, {498, "MD"}, {500, "MS"}, {504, "MA"}, {508, "MZ"}, {512, "OM"}
, {516, "NA"}, {520, "NR"}, {524, "NP"}, {528, "NL"}, {530, "AN"}
, {533, "AW"}, {540, "NC"}, {548, "VU"}, {554, "NZ"}, {558, "NI"}
, {562, "NE"}, {566, "NG"}, {570, "NU"}, {574, "NF"}, {578, "NO"}
, {580, "MP"}, {581, "UM"}, {583, "FM"}, {584, "MH"}, {585, "PW"}
, {586, "PK"}, {591, "PA"}, {598, "PG"}, {600, "PY"}, {604, "PE"}
, {608, "PH"}, {612, "PN"}, {616, "PL"}, {620, "PT"}, {624, "GW"}
, {626, "TL"}, {630, "PR"}, {634, "QA"}, {634, "QA"}, {638, "RE"}
, {642, "RO"}, {643, "RU"}, {646, "RW"}, {654, "SH"}, {659, "KN"}
, {660, "AI"}, {662, "LC"}, {666, "PM"}, {670, "VC"}, {674, "SM"}
, {678, "ST"}, {682, "SA"}, {686, "SN"}, {690, "SC"}, {694, "SL"}
, {702, "SG"}, {703, "SK"}, {704, "VN"}, {705, "SI"}, {706, "SO"}
, {710, "ZA"}, {716, "ZW"}, {724, "ES"}, {732, "EH"}, {736, "SD"}
, {740, "SR"}, {744, "SJ"}, {748, "SZ"}, {752, "SE"}, {756, "CH"}
, {760, "SY"}, {762, "TJ"}, {764, "TH"}, {768, "TG"}, {772, "TK"}
, {776, "TO"}, {780, "TT"}, {784, "AE"}, {788, "TN"}, {792, "TR"}
, {795, "TM"}, {796, "TC"}, {798, "TV"}, {800, "UG"}, {804, "UA"}
, {807, "MK"}, {818, "EG"}, {826, "GB"}, {834, "TZ"}, {840, "US"}
, {850, "VI"}, {854, "BF"}, {858, "UY"}, {860, "UZ"}, {862, "VE"}
, {876, "WF"}, {882, "WS"}, {887, "YE"}, {891, "CS"}, {894, "ZM"}
};
if (error || i == tcp::resolver::iterator())
{
// this is used to indicate that we shouldn't
// try to resolve it again
p->set_country("--");
return;
}
while (i != tcp::resolver::iterator()
&& !i->endpoint().address().is_v4()) ++i;
if (i != tcp::resolver::iterator())
{
// country is an ISO 3166 country code
int country = i->endpoint().address().to_v4().to_ulong() & 0xffff;
// look up the country code in the map
const int size = sizeof(country_map)/sizeof(country_map[0]);
country_entry tmp = {country, ""};
country_entry const* i =
std::lower_bound(country_map, country_map + size, tmp
, bind(&country_entry::code, _1) < bind(&country_entry::code, _2));
if (i == country_map + size
|| i->code != country)
{
// unknown country!
p->set_country("!!");
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_ses.m_logger) << "IP " << p->remote().address() << " was mapped to unknown country: " << country << "\n";
#endif
return;
}
p->set_country(i->name);
}
}
#endif
bool torrent::connect_to_peer(policy::peer* peerinfo) throw()
{
INVARIANT_CHECK;
TORRENT_ASSERT(peerinfo);
TORRENT_ASSERT(peerinfo->connection == 0);
peerinfo->connected = time_now();
#ifndef NDEBUG
// this asserts that we don't have duplicates in the policy's peer list
peer_iterator i_ = std::find_if(m_connections.begin(), m_connections.end()
, bind(&peer_connection::remote, _1) == peerinfo->ip);
TORRENT_ASSERT(i_ == m_connections.end()
|| dynamic_cast<bt_peer_connection*>(*i_) == 0);
#endif
TORRENT_ASSERT(want_more_peers());
TORRENT_ASSERT(m_ses.num_connections() < m_ses.max_connections());
tcp::endpoint const& a(peerinfo->ip);
TORRENT_ASSERT((m_ses.m_ip_filter.access(a.address()) & ip_filter::blocked) == 0);
boost::shared_ptr<socket_type> s(new socket_type);
bool ret = instantiate_connection(m_ses.m_io_service, m_ses.peer_proxy(), *s);
TORRENT_ASSERT(ret);
boost::intrusive_ptr<peer_connection> c(new bt_peer_connection(
m_ses, shared_from_this(), s, a, peerinfo));
#ifndef NDEBUG
c->m_in_constructor = false;
#endif
try
{
#ifndef TORRENT_DISABLE_EXTENSIONS
for (extension_list_t::iterator i = m_extensions.begin()
, end(m_extensions.end()); i != end; ++i)
{
boost::shared_ptr<peer_plugin> pp((*i)->new_connection(c.get()));
if (pp) c->add_extension(pp);
}
#endif
// add the newly connected peer to this torrent's peer list
m_connections.insert(boost::get_pointer(c));
m_ses.m_connections.insert(c);
int timeout = settings().peer_connect_timeout;
if (peerinfo) timeout += 3 * peerinfo->failcount;
m_ses.m_half_open.enqueue(
bind(&peer_connection::connect, c, _1)
, bind(&peer_connection::timed_out, c)
, seconds(timeout));
}
catch (std::exception& e)
{
std::set<peer_connection*>::iterator i
= m_connections.find(boost::get_pointer(c));
if (i != m_connections.end()) m_connections.erase(i);
m_ses.connection_failed(c, a, e.what());
c->disconnect();
return false;
}
peerinfo->connection = c.get();
return true;
}
void torrent::set_metadata(entry const& metadata)
{
INVARIANT_CHECK;
TORRENT_ASSERT(!m_torrent_file->is_valid());
m_torrent_file->parse_info_section(metadata);
init();
boost::mutex::scoped_lock(m_checker.m_mutex);
boost::shared_ptr<aux::piece_checker_data> d(
new aux::piece_checker_data);
d->torrent_ptr = shared_from_this();
d->save_path = m_save_path;
d->info_hash = m_torrent_file->info_hash();
// add the torrent to the queue to be checked
m_checker.m_torrents.push_back(d);
typedef session_impl::torrent_map torrent_map;
torrent_map::iterator i = m_ses.m_torrents.find(
m_torrent_file->info_hash());
TORRENT_ASSERT(i != m_ses.m_torrents.end());
m_ses.m_torrents.erase(i);
// and notify the thread that it got another
// job in its queue
m_checker.m_cond.notify_one();
if (m_ses.m_alerts.should_post(alert::info))
{
m_ses.m_alerts.post_alert(metadata_received_alert(
get_handle(), "metadata successfully received from swarm"));
}
}
void torrent::attach_peer(peer_connection* p)
{
// INVARIANT_CHECK;
TORRENT_ASSERT(p != 0);
TORRENT_ASSERT(!p->is_local());
if (m_ses.m_connections.find(p) == m_ses.m_connections.end())
{
throw protocol_error("peer is not properly constructed");
}
if (m_ses.is_aborted())
{
throw protocol_error("session is closing");
}
TORRENT_ASSERT(m_connections.find(p) == m_connections.end());
peer_iterator ci = m_connections.insert(p).first;
try
{
// if new_connection throws, we have to remove the
// it from the list.
#ifndef TORRENT_DISABLE_EXTENSIONS
for (extension_list_t::iterator i = m_extensions.begin()
, end(m_extensions.end()); i != end; ++i)
{
boost::shared_ptr<peer_plugin> pp((*i)->new_connection(p));
if (pp) p->add_extension(pp);
}
#endif
TORRENT_ASSERT(m_connections.find(p) == ci);
TORRENT_ASSERT(*ci == p);
m_policy.new_connection(**ci);
}
catch (std::exception& e)
{
m_connections.erase(ci);
throw;
}
TORRENT_ASSERT(p->remote() == p->get_socket()->remote_endpoint());
#ifndef NDEBUG
m_policy.check_invariant();
#endif
}
bool torrent::want_more_peers() const
{
return int(m_connections.size()) < m_max_connections
&& m_ses.m_half_open.free_slots()
&& !m_paused;
}
void torrent::disconnect_all()
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
INVARIANT_CHECK;
while (!m_connections.empty())
{
peer_connection* p = *m_connections.begin();
TORRENT_ASSERT(p->associated_torrent().lock().get() == this);
#if defined(TORRENT_VERBOSE_LOGGING)
if (m_abort)
(*p->m_logger) << "*** CLOSING CONNECTION 'aborting'\n";
else
(*p->m_logger) << "*** CLOSING CONNECTION 'pausing'\n";
#endif
#ifndef NDEBUG
std::size_t size = m_connections.size();
#endif
p->disconnect();
TORRENT_ASSERT(m_connections.size() <= size);
}
}
int torrent::bandwidth_throttle(int channel) const
{
return m_bandwidth_limit[channel].throttle();
}
void torrent::request_bandwidth(int channel
, boost::intrusive_ptr<peer_connection> const& p
, bool non_prioritized)
{
TORRENT_ASSERT(m_bandwidth_limit[channel].throttle() > 0);
int block_size = m_bandwidth_limit[channel].throttle() / 10;
if (block_size <= 0) block_size = 1;
if (m_bandwidth_limit[channel].max_assignable() > 0)
{
perform_bandwidth_request(channel, p, block_size, non_prioritized);
}
else
{
// skip forward in the queue until we find a prioritized peer
// or hit the front of it.
queue_t::reverse_iterator i = m_bandwidth_queue[channel].rbegin();
while (i != m_bandwidth_queue[channel].rend() && i->non_prioritized) ++i;
m_bandwidth_queue[channel].insert(i.base(), bw_queue_entry<peer_connection>(
p, block_size, non_prioritized));
}
}
void torrent::expire_bandwidth(int channel, int amount)
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
TORRENT_ASSERT(amount > 0);
m_bandwidth_limit[channel].expire(amount);
while (!m_bandwidth_queue[channel].empty())
{
bw_queue_entry<peer_connection> qe = m_bandwidth_queue[channel].front();
if (m_bandwidth_limit[channel].max_assignable() == 0)
break;
m_bandwidth_queue[channel].pop_front();
perform_bandwidth_request(channel, qe.peer
, qe.max_block_size, qe.non_prioritized);
}
}
void torrent::perform_bandwidth_request(int channel
, boost::intrusive_ptr<peer_connection> const& p
, int block_size
, bool non_prioritized)
{
m_ses.m_bandwidth_manager[channel]->request_bandwidth(p
, block_size, non_prioritized);
m_bandwidth_limit[channel].assign(block_size);
}
void torrent::assign_bandwidth(int channel, int amount, int blk)
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
TORRENT_ASSERT(amount > 0);
TORRENT_ASSERT(amount <= blk);
if (amount < blk)
expire_bandwidth(channel, blk - amount);
}
// called when torrent is finished (all interesting
// pieces have been downloaded)
void torrent::finished()
{
INVARIANT_CHECK;
if (alerts().should_post(alert::info))
{
alerts().post_alert(torrent_finished_alert(
get_handle()
, "torrent has finished downloading"));
}
// disconnect all seeds
// TODO: should disconnect all peers that have the pieces we have
// not just seeds
std::vector<peer_connection*> seeds;
for (peer_iterator i = m_connections.begin();
i != m_connections.end(); ++i)
{
peer_connection* p = *i;
TORRENT_ASSERT(p->associated_torrent().lock().get() == this);
if (p->is_seed())
{
#if defined(TORRENT_VERBOSE_LOGGING)
(*p->m_logger) << "*** SEED, CLOSING CONNECTION\n";
#endif
seeds.push_back(p);
}
}
std::for_each(seeds.begin(), seeds.end()
, bind(&peer_connection::disconnect, _1));
TORRENT_ASSERT(m_storage);
// we need to keep the object alive during this operation
m_storage->async_release_files(
bind(&torrent::on_files_released, shared_from_this(), _1, _2));
}
// called when torrent is complete (all pieces downloaded)
void torrent::completed()
{
INVARIANT_CHECK;
// make the next tracker request
// be a completed-event
m_event = tracker_request::completed;
force_tracker_request();
}
// this will move the tracker with the given index
// to a prioritized position in the list (move it towards
// the begining) and return the new index to the tracker.
int torrent::prioritize_tracker(int index)
{
INVARIANT_CHECK;
TORRENT_ASSERT(index >= 0);
if (index >= (int)m_trackers.size()) return (int)m_trackers.size()-1;
while (index > 0 && m_trackers[index].tier == m_trackers[index-1].tier)
{
std::swap(m_trackers[index].url, m_trackers[index-1].url);
--index;
}
return index;
}
void torrent::try_next_tracker()
{
INVARIANT_CHECK;
++m_currently_trying_tracker;
if ((unsigned)m_currently_trying_tracker >= m_trackers.size())
{
int delay = tracker_retry_delay_min
+ (std::min)(m_failed_trackers, (int)tracker_failed_max)
* (tracker_retry_delay_max - tracker_retry_delay_min)
/ tracker_failed_max;
++m_failed_trackers;
// if we've looped the tracker list, wait a bit before retrying
m_currently_trying_tracker = 0;
m_next_request = time_now() + seconds(delay);
#ifndef TORRENT_DISABLE_DHT
// only start the announce if we want to announce with the dht
if (should_announce_dht())
{
if (m_abort) return;
// force the DHT to reannounce
m_last_dht_announce = time_now() - minutes(15);
boost::weak_ptr<torrent> self(shared_from_this());
m_announce_timer.expires_from_now(seconds(1));
m_announce_timer.async_wait(m_ses.m_strand.wrap(
bind(&torrent::on_announce_disp, self, _1)));
}
#endif
}
else
{
// don't delay before trying the next tracker
m_next_request = time_now();
}
}
bool torrent::check_fastresume(aux::piece_checker_data& data)
{
INVARIANT_CHECK;
TORRENT_ASSERT(valid_metadata());
bool done = true;
try
{
std::string error_msg;
TORRENT_ASSERT(m_storage);
TORRENT_ASSERT(m_owning_storage.get());
done = m_storage->check_fastresume(data, m_have_pieces, m_num_pieces
, m_storage_mode, error_msg);
if (!error_msg.empty() && m_ses.m_alerts.should_post(alert::warning))
{
m_ses.m_alerts.post_alert(fastresume_rejected_alert(
get_handle(), error_msg));
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_ses.m_logger) << "fastresume data for "
<< torrent_file().name() << " rejected: "
<< error_msg << "\n";
#endif
}
}
catch (std::exception& e)
{
// probably means file permission failure or invalid filename
std::fill(m_have_pieces.begin(), m_have_pieces.end(), false);
m_num_pieces = 0;
if (m_ses.m_alerts.should_post(alert::fatal))
{
m_ses.m_alerts.post_alert(
file_error_alert(
get_handle()
, e.what()));
}
pause();
}
return done;
}
std::pair<bool, float> torrent::check_files()
{
TORRENT_ASSERT(m_torrent_file->is_valid());
INVARIANT_CHECK;
TORRENT_ASSERT(m_owning_storage.get());
std::pair<bool, float> progress(true, 1.f);
try
{
TORRENT_ASSERT(m_storage);
progress = m_storage->check_files(m_have_pieces, m_num_pieces
, m_ses.m_mutex);
}
catch (std::exception& e)
{
// probably means file permission failure or invalid filename
std::fill(m_have_pieces.begin(), m_have_pieces.end(), false);
m_num_pieces = 0;
if (m_ses.m_alerts.should_post(alert::fatal))
{
m_ses.m_alerts.post_alert(
file_error_alert(
get_handle()
, e.what()));
}
pause();
}
return progress;
}
void torrent::files_checked(std::vector<piece_picker::downloading_piece> const&
unfinished_pieces)
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
TORRENT_ASSERT(m_torrent_file->is_valid());
INVARIANT_CHECK;
if (!is_seed())
{
// this is filled in with pieces that needs to be checked
// against its hashes.
std::vector<int> verify_pieces;
m_picker->files_checked(m_have_pieces, unfinished_pieces, verify_pieces);
if (m_sequenced_download_threshold > 0)
picker().set_sequenced_download_threshold(m_sequenced_download_threshold);
while (!verify_pieces.empty())
{
int piece = verify_pieces.back();
verify_pieces.pop_back();
async_verify_piece(piece, bind(&torrent::piece_finished
, shared_from_this(), piece, _1));
}
}
#ifndef TORRENT_DISABLE_EXTENSIONS
for (extension_list_t::iterator i = m_extensions.begin()
, end(m_extensions.end()); i != end; ++i)
{
try { (*i)->on_files_checked(); } catch (std::exception&) {}
}
#endif
if (is_seed())
{
m_picker.reset();
m_torrent_file->seed_free();
}
if (!m_connections_initialized)
{
m_connections_initialized = true;
// all peer connections have to initialize themselves now that the metadata
// is available
for (torrent::peer_iterator i = m_connections.begin()
, end(m_connections.end()); i != end;)
{
try
{
(*i)->on_metadata();
(*i)->init();
++i;
}
catch (std::exception& e)
{
// the connection failed, close it
torrent::peer_iterator j = i;
++j;
m_ses.connection_failed(*i, (*i)->remote(), e.what());
i = j;
}
}
}
}
alert_manager& torrent::alerts() const
{
return m_ses.m_alerts;
}
fs::path torrent::save_path() const
{
if (m_owning_storage.get())
return m_owning_storage->save_path();
else
return m_save_path;
}
void torrent::move_storage(fs::path const& save_path)
{
INVARIANT_CHECK;
if (m_owning_storage.get())
{
m_owning_storage->async_move_storage(save_path
, bind(&torrent::on_storage_moved, shared_from_this(), _1, _2));
}
else
{
m_save_path = save_path;
}
}
void torrent::on_storage_moved(int ret, disk_io_job const& j)
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
if (alerts().should_post(alert::warning))
{
alerts().post_alert(storage_moved_alert(get_handle(), j.str));
}
}
piece_manager& torrent::filesystem()
{
TORRENT_ASSERT(m_owning_storage.get());
return *m_owning_storage;
}
torrent_handle torrent::get_handle() const
{
return torrent_handle(&m_ses, &m_checker, m_torrent_file->info_hash());
}
session_settings const& torrent::settings() const
{
return m_ses.settings();
}
#ifndef NDEBUG
void torrent::check_invariant() const
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
int num_uploads = 0;
std::map<piece_block, int> num_requests;
for (const_peer_iterator i = begin(); i != end(); ++i)
{
peer_connection const& p = *(*i);
for (std::deque<piece_block>::const_iterator i = p.request_queue().begin()
, end(p.request_queue().end()); i != end; ++i)
++num_requests[*i];
for (std::deque<piece_block>::const_iterator i = p.download_queue().begin()
, end(p.download_queue().end()); i != end; ++i)
++num_requests[*i];
if (!p.is_choked()) ++num_uploads;
torrent* associated_torrent = p.associated_torrent().lock().get();
if (associated_torrent != this)
TORRENT_ASSERT(false);
}
TORRENT_ASSERT(num_uploads == m_num_uploads);
if (has_picker())
{
for (std::map<piece_block, int>::iterator i = num_requests.begin()
, end(num_requests.end()); i != end; ++i)
{
TORRENT_ASSERT(m_picker->num_peers(i->first) == i->second);
}
}
if (valid_metadata())
{
TORRENT_ASSERT(m_abort || int(m_have_pieces.size()) == m_torrent_file->num_pieces());
}
else
{
TORRENT_ASSERT(m_abort || m_have_pieces.empty());
}
for (policy::const_iterator i = m_policy.begin_peer()
, end(m_policy.end_peer()); i != end; ++i)
{
TORRENT_ASSERT(i->second.ip.address() == i->first);
}
size_type total_done = quantized_bytes_done();
if (m_torrent_file->is_valid())
{
if (is_seed())
TORRENT_ASSERT(total_done == m_torrent_file->total_size());
else
TORRENT_ASSERT(total_done != m_torrent_file->total_size());
}
else
{
TORRENT_ASSERT(total_done == 0);
}
if (m_picker && !m_abort)
{
// make sure that pieces that have completed the download
// of all their blocks are in the disk io thread's queue
// to be checked.
const std::vector<piece_picker::downloading_piece>& dl_queue
= m_picker->get_download_queue();
for (std::vector<piece_picker::downloading_piece>::const_iterator i =
dl_queue.begin(); i != dl_queue.end(); ++i)
{
const int blocks_per_piece = m_picker->blocks_in_piece(i->index);
bool complete = true;
for (int j = 0; j < blocks_per_piece; ++j)
{
if (i->info[j].state == piece_picker::block_info::state_finished)
continue;
complete = false;
break;
}
if (complete)
{
disk_io_job ret = m_ses.m_disk_thread.find_job(
m_owning_storage, -1, i->index);
TORRENT_ASSERT(ret.action == disk_io_job::hash || ret.action == disk_io_job::write);
TORRENT_ASSERT(ret.piece == i->index);
}
}
}
// This check is very expensive.
TORRENT_ASSERT(m_num_pieces
== std::count(m_have_pieces.begin(), m_have_pieces.end(), true));
TORRENT_ASSERT(!valid_metadata() || m_block_size > 0);
TORRENT_ASSERT(!valid_metadata() || (m_torrent_file->piece_length() % m_block_size) == 0);
// if (is_seed()) TORRENT_ASSERT(m_picker.get() == 0);
}
#endif
void torrent::set_sequenced_download_threshold(int threshold)
{
if (has_picker())
{
picker().set_sequenced_download_threshold(threshold);
}
else
{
m_sequenced_download_threshold = threshold;
}
}
void torrent::set_max_uploads(int limit)
{
TORRENT_ASSERT(limit >= -1);
if (limit <= 0) limit = (std::numeric_limits<int>::max)();
m_max_uploads = limit;
}
void torrent::set_max_connections(int limit)
{
TORRENT_ASSERT(limit >= -1);
if (limit <= 0) limit = (std::numeric_limits<int>::max)();
m_max_connections = limit;
}
void torrent::set_peer_upload_limit(tcp::endpoint ip, int limit)
{
TORRENT_ASSERT(limit >= -1);
peer_iterator i = std::find_if(m_connections.begin(), m_connections.end()
, bind(&peer_connection::remote, _1) == ip);
if (i == m_connections.end()) return;
(*i)->set_upload_limit(limit);
}
void torrent::set_peer_download_limit(tcp::endpoint ip, int limit)
{
TORRENT_ASSERT(limit >= -1);
peer_iterator i = std::find_if(m_connections.begin(), m_connections.end()
, bind(&peer_connection::remote, _1) == ip);
if (i == m_connections.end()) return;
(*i)->set_download_limit(limit);
}
void torrent::set_upload_limit(int limit)
{
TORRENT_ASSERT(limit >= -1);
if (limit <= 0) limit = (std::numeric_limits<int>::max)();
if (limit < num_peers() * 10) limit = num_peers() * 10;
m_bandwidth_limit[peer_connection::upload_channel].throttle(limit);
}
int torrent::upload_limit() const
{
int limit = m_bandwidth_limit[peer_connection::upload_channel].throttle();
if (limit == (std::numeric_limits<int>::max)()) limit = -1;
return limit;
}
void torrent::set_download_limit(int limit)
{
TORRENT_ASSERT(limit >= -1);
if (limit <= 0) limit = (std::numeric_limits<int>::max)();
if (limit < num_peers() * 10) limit = num_peers() * 10;
m_bandwidth_limit[peer_connection::download_channel].throttle(limit);
}
int torrent::download_limit() const
{
int limit = m_bandwidth_limit[peer_connection::download_channel].throttle();
if (limit == (std::numeric_limits<int>::max)()) limit = -1;
return limit;
}
void torrent::delete_files()
{
#if defined(TORRENT_VERBOSE_LOGGING)
for (peer_iterator i = m_connections.begin();
i != m_connections.end(); ++i)
{
(*(*i)->m_logger) << "*** DELETING FILES IN TORRENT\n";
}
#endif
disconnect_all();
m_paused = true;
// tell the tracker that we stopped
m_event = tracker_request::stopped;
if (m_owning_storage.get())
{
TORRENT_ASSERT(m_storage);
m_storage->async_delete_files(
bind(&torrent::on_files_deleted, shared_from_this(), _1, _2));
}
}
void torrent::pause()
{
INVARIANT_CHECK;
if (m_paused) return;
#ifndef TORRENT_DISABLE_EXTENSIONS
for (extension_list_t::iterator i = m_extensions.begin()
, end(m_extensions.end()); i != end; ++i)
{
try { if ((*i)->on_pause()) return; } catch (std::exception&) {}
}
#endif
#if defined(TORRENT_VERBOSE_LOGGING)
for (peer_iterator i = m_connections.begin();
i != m_connections.end(); ++i)
{
(*(*i)->m_logger) << "*** PAUSING TORRENT\n";
}
#endif
disconnect_all();
m_paused = true;
// tell the tracker that we stopped
m_event = tracker_request::stopped;
m_just_paused = true;
// this will make the storage close all
// files and flush all cached data
if (m_owning_storage.get())
{
TORRENT_ASSERT(m_storage);
m_storage->async_release_files(
bind(&torrent::on_torrent_paused, shared_from_this(), _1, _2));
}
}
void torrent::resume()
{
INVARIANT_CHECK;
if (!m_paused) return;
#ifndef TORRENT_DISABLE_EXTENSIONS
for (extension_list_t::iterator i = m_extensions.begin()
, end(m_extensions.end()); i != end; ++i)
{
try { if ((*i)->on_resume()) return; } catch (std::exception&) {}
}
#endif
m_paused = false;
// tell the tracker that we're back
m_event = tracker_request::started;
force_tracker_request();
// make pulse be called as soon as possible
m_time_scaler = 0;
}
void torrent::second_tick(stat& accumulator, float tick_interval)
{
INVARIANT_CHECK;
#ifndef TORRENT_DISABLE_EXTENSIONS
for (extension_list_t::iterator i = m_extensions.begin()
, end(m_extensions.end()); i != end; ++i)
{
try { (*i)->tick(); } catch (std::exception&) {}
}
#endif
if (m_paused)
{
// let the stats fade out to 0
m_stat.second_tick(tick_interval);
return;
}
// ---- WEB SEEDS ----
// if we have everything we want we don't need to connect to any web-seed
if (!is_finished() && !m_web_seeds.empty())
{
// keep trying web-seeds if there are any
// first find out which web seeds we are connected to
std::set<std::string> web_seeds;
for (peer_iterator i = m_connections.begin();
i != m_connections.end(); ++i)
{
web_peer_connection* p
= dynamic_cast<web_peer_connection*>(*i);
if (!p) continue;
web_seeds.insert(p->url());
}
for (std::set<std::string>::iterator i = m_resolving_web_seeds.begin()
, end(m_resolving_web_seeds.end()); i != end; ++i)
web_seeds.insert(web_seeds.begin(), *i);
// from the list of available web seeds, subtract the ones we are
// already connected to.
std::vector<std::string> not_connected_web_seeds;
std::set_difference(m_web_seeds.begin(), m_web_seeds.end(), web_seeds.begin()
, web_seeds.end(), std::back_inserter(not_connected_web_seeds));
// connect to all of those that we aren't connected to
std::for_each(not_connected_web_seeds.begin(), not_connected_web_seeds.end()
, bind(&torrent::connect_to_url_seed, this, _1));
}
for (peer_iterator i = m_connections.begin();
i != m_connections.end();)
{
peer_connection* p = *i;
++i;
m_stat += p->statistics();
// updates the peer connection's ul/dl bandwidth
// resource requests
try
{
p->second_tick(tick_interval);
}
catch (std::exception& e)
{
#ifdef TORRENT_VERBOSE_LOGGING
(*p->m_logger) << "**ERROR**: " << e.what() << "\n";
#endif
p->set_failed();
p->disconnect();
}
}
accumulator += m_stat;
m_stat.second_tick(tick_interval);
m_time_scaler--;
if (m_time_scaler <= 0)
{
m_time_scaler = 10;
m_policy.pulse();
}
}
bool torrent::try_connect_peer()
{
TORRENT_ASSERT(want_more_peers());
return m_policy.connect_one_peer();
}
void torrent::async_verify_piece(int piece_index, boost::function<void(bool)> const& f)
{
// INVARIANT_CHECK;
TORRENT_ASSERT(m_storage);
TORRENT_ASSERT(m_storage->refcount() > 0);
TORRENT_ASSERT(piece_index >= 0);
TORRENT_ASSERT(piece_index < m_torrent_file->num_pieces());
TORRENT_ASSERT(piece_index < (int)m_have_pieces.size());
m_storage->async_hash(piece_index, bind(&torrent::on_piece_verified
, shared_from_this(), _1, _2, f));
#ifndef NDEBUG
check_invariant();
#endif
}
void torrent::on_piece_verified(int ret, disk_io_job const& j
, boost::function<void(bool)> f)
{
sha1_hash h(j.str);
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
f(m_torrent_file->hash_for_piece(j.piece) == h);
}
const tcp::endpoint& torrent::current_tracker() const
{
return m_tracker_address;
}
bool torrent::is_allocating() const
{ return m_owning_storage.get() && m_owning_storage->is_allocating(); }
void torrent::file_progress(std::vector<float>& fp) const
{
TORRENT_ASSERT(valid_metadata());
fp.clear();
fp.resize(m_torrent_file->num_files(), 0.f);
for (int i = 0; i < m_torrent_file->num_files(); ++i)
{
peer_request ret = m_torrent_file->map_file(i, 0, 0);
size_type size = m_torrent_file->file_at(i).size;
// zero sized files are considered
// 100% done all the time
if (size == 0)
{
fp[i] = 1.f;
continue;
}
size_type done = 0;
while (size > 0)
{
size_type bytes_step = (std::min)(m_torrent_file->piece_size(ret.piece)
- ret.start, size);
if (m_have_pieces[ret.piece]) done += bytes_step;
++ret.piece;
ret.start = 0;
size -= bytes_step;
}
TORRENT_ASSERT(size == 0);
fp[i] = static_cast<float>(done) / m_torrent_file->file_at(i).size;
}
}
torrent_status torrent::status() const
{
INVARIANT_CHECK;
TORRENT_ASSERT(std::accumulate(
m_have_pieces.begin()
, m_have_pieces.end()
, 0) == m_num_pieces);
torrent_status st;
st.num_peers = (int)std::count_if(m_connections.begin(), m_connections.end(),
!boost::bind(&peer_connection::is_connecting, _1));
st.storage_mode = m_storage_mode;
st.num_complete = m_complete;
st.num_incomplete = m_incomplete;
st.paused = m_paused;
boost::tie(st.total_done, st.total_wanted_done) = bytes_done();
// payload transfer
st.total_payload_download = m_stat.total_payload_download();
st.total_payload_upload = m_stat.total_payload_upload();
// total transfer
st.total_download = m_stat.total_payload_download()
+ m_stat.total_protocol_download();
st.total_upload = m_stat.total_payload_upload()
+ m_stat.total_protocol_upload();
// failed bytes
st.total_failed_bytes = m_total_failed_bytes;
st.total_redundant_bytes = m_total_redundant_bytes;
// transfer rate
st.download_rate = m_stat.download_rate();
st.upload_rate = m_stat.upload_rate();
st.download_payload_rate = m_stat.download_payload_rate();
st.upload_payload_rate = m_stat.upload_payload_rate();
st.next_announce = boost::posix_time::seconds(
total_seconds(next_announce() - time_now()));
if (st.next_announce.is_negative())
st.next_announce = boost::posix_time::seconds(0);
st.announce_interval = boost::posix_time::seconds(m_duration);
if (m_last_working_tracker >= 0)
{
st.current_tracker
= m_trackers[m_last_working_tracker].url;
}
st.num_uploads = m_num_uploads;
st.uploads_limit = m_max_uploads;
st.num_connections = int(m_connections.size());
st.connections_limit = m_max_connections;
// if we don't have any metadata, stop here
if (!valid_metadata())
{
if (m_got_tracker_response == false)
st.state = torrent_status::connecting_to_tracker;
else
st.state = torrent_status::downloading_metadata;
// TODO: add a progress member to the torrent that will be used in this case
// and that may be set by a plugin
// if (m_metadata_size == 0) st.progress = 0.f;
// else st.progress = (std::min)(1.f, m_metadata_progress / (float)m_metadata_size);
st.progress = 0.f;
st.block_size = 0;
return st;
}
st.block_size = block_size();
// fill in status that depends on metadata
st.total_wanted = m_torrent_file->total_size();
if (m_picker.get() && (m_picker->num_filtered() > 0
|| m_picker->num_have_filtered() > 0))
{
int filtered_pieces = m_picker->num_filtered()
+ m_picker->num_have_filtered();
int last_piece_index = m_torrent_file->num_pieces() - 1;
if (m_picker->piece_priority(last_piece_index) == 0)
{
st.total_wanted -= m_torrent_file->piece_size(last_piece_index);
--filtered_pieces;
}
st.total_wanted -= filtered_pieces * m_torrent_file->piece_length();
}
TORRENT_ASSERT(st.total_wanted >= st.total_wanted_done);
if (st.total_wanted == 0) st.progress = 1.f;
else st.progress = st.total_wanted_done
/ static_cast<double>(st.total_wanted);
st.pieces = &m_have_pieces;
st.num_pieces = m_num_pieces;
if (m_got_tracker_response == false)
{
st.state = torrent_status::connecting_to_tracker;
}
else if (is_seed())
{
TORRENT_ASSERT(st.total_done == m_torrent_file->total_size());
st.state = torrent_status::seeding;
}
else if (st.total_wanted_done == st.total_wanted)
{
st.state = torrent_status::finished;
}
else
{
st.state = torrent_status::downloading;
}
st.num_seeds = num_seeds();
if (m_picker.get())
st.distributed_copies = m_picker->distributed_copies();
else
st.distributed_copies = -1;
return st;
}
int torrent::num_seeds() const
{
INVARIANT_CHECK;
return (int)std::count_if(m_connections.begin(), m_connections.end()
, boost::bind(&peer_connection::is_seed, _1));
}
void torrent::tracker_request_timed_out(
tracker_request const&)
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
INVARIANT_CHECK;
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
debug_log("*** tracker timed out");
#endif
if (m_ses.m_alerts.should_post(alert::warning))
{
std::stringstream s;
s << "tracker: \""
<< m_trackers[m_currently_trying_tracker].url
<< "\" timed out";
m_ses.m_alerts.post_alert(tracker_alert(get_handle()
, m_failed_trackers + 1, 0, s.str()));
}
try_next_tracker();
}
// TODO: with some response codes, we should just consider
// the tracker as a failure and not retry
// it anymore
void torrent::tracker_request_error(tracker_request const&
, int response_code, const std::string& str)
{
session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
INVARIANT_CHECK;
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
debug_log(std::string("*** tracker error: ") + str);
#endif
if (m_ses.m_alerts.should_post(alert::warning))
{
std::stringstream s;
s << "tracker: \""
<< m_trackers[m_currently_trying_tracker].url
<< "\" " << str;
m_ses.m_alerts.post_alert(tracker_alert(get_handle()
, m_failed_trackers + 1, response_code, s.str()));
}
try_next_tracker();
}
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
void torrent::debug_log(const std::string& line)
{
(*m_ses.m_logger) << time_now_string() << " " << line << "\n";
}
#endif
}
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