premiere-libtorrent/src/session_impl.cpp

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/*
Copyright (c) 2006, Arvid Norberg, Magnus Jonsson
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 <algorithm>
#ifdef _MSC_VER
#pragma warning(push, 1)
#endif
#include <boost/lexical_cast.hpp>
#include <boost/filesystem/convenience.hpp>
#include <boost/filesystem/exception.hpp>
#include <boost/limits.hpp>
#include <boost/bind.hpp>
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#include "libtorrent/peer_id.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/session.hpp"
#include "libtorrent/fingerprint.hpp"
#include "libtorrent/entry.hpp"
#include "libtorrent/alert_types.hpp"
#include "libtorrent/invariant_check.hpp"
#include "libtorrent/file.hpp"
#include "libtorrent/bt_peer_connection.hpp"
#include "libtorrent/ip_filter.hpp"
#include "libtorrent/socket.hpp"
#include "libtorrent/aux_/session_impl.hpp"
#include "libtorrent/kademlia/dht_tracker.hpp"
#include "libtorrent/enum_net.hpp"
#ifndef TORRENT_DISABLE_ENCRYPTION
#include <openssl/crypto.h>
namespace
{
// openssl requires this to clean up internal
// structures it allocates
struct openssl_cleanup
{
~openssl_cleanup() { CRYPTO_cleanup_all_ex_data(); }
} openssl_global_destructor;
}
#endif
#ifdef _WIN32
// for ERROR_SEM_TIMEOUT
#include <winerror.h>
#endif
using boost::shared_ptr;
using boost::weak_ptr;
using boost::bind;
using boost::mutex;
using libtorrent::aux::session_impl;
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namespace libtorrent {
namespace fs = boost::filesystem;
namespace detail
{
std::string generate_auth_string(std::string const& user
, std::string const& passwd)
{
if (user.empty()) return std::string();
return user + ":" + passwd;
}
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}
namespace aux {
struct seed_random_generator
{
seed_random_generator()
{
std::srand(total_microseconds(time_now() - min_time()));
}
};
session_impl::session_impl(
std::pair<int, int> listen_port_range
, fingerprint const& cl_fprint
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, char const* listen_interface
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#if defined TORRENT_VERBOSE_LOGGING || defined TORRENT_LOGGING || defined TORRENT_ERROR_LOGGING
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, fs::path const& logpath
#endif
)
:
#ifndef TORRENT_DISABLE_POOL_ALLOCATOR
m_send_buffers(send_buffer_size),
#endif
m_files(40)
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, m_io_service()
, m_disk_thread(m_io_service)
, m_half_open(m_io_service)
, m_download_channel(m_io_service, peer_connection::download_channel)
#ifdef TORRENT_VERBOSE_BANDWIDTH_LIMIT
, m_upload_channel(m_io_service, peer_connection::upload_channel, true)
#else
, m_upload_channel(m_io_service, peer_connection::upload_channel)
#endif
, m_tracker_manager(m_settings, m_tracker_proxy)
, m_listen_port_retries(listen_port_range.second - listen_port_range.first)
, m_listen_interface(address::from_string(listen_interface), listen_port_range.first)
, m_abort(false)
, m_max_uploads(8)
, m_allowed_upload_slots(8)
, m_max_connections(200)
, m_num_unchoked(0)
, m_unchoke_time_scaler(0)
, m_optimistic_unchoke_time_scaler(0)
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, m_disconnect_time_scaler(90)
, m_incoming_connection(false)
, m_last_tick(time_now())
#ifndef TORRENT_DISABLE_DHT
, m_dht_same_port(true)
, m_external_udp_port(0)
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, m_dht_socket(m_io_service, bind(&session_impl::on_receive_udp, this, _1, _2, _3, _4)
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, m_half_open)
#endif
, m_timer(m_io_service)
, m_next_connect_torrent(0)
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#if defined TORRENT_VERBOSE_LOGGING || defined TORRENT_LOGGING || defined TORRENT_ERROR_LOGGING
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, m_logpath(logpath)
#endif
#ifndef TORRENT_DISABLE_GEO_IP
, m_asnum_db(0)
, m_country_db(0)
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#endif
{
m_tcp_mapping[0] = -1;
m_tcp_mapping[1] = -1;
m_udp_mapping[0] = -1;
m_udp_mapping[1] = -1;
#ifdef WIN32
// windows XP has a limit on the number of
// simultaneous half-open TCP connections
DWORD windows_version = ::GetVersion();
if ((windows_version & 0xff) >= 6)
{
// on vista the limit is 5 (in home edition)
m_half_open.limit(4);
}
else
{
// on XP SP2 it's 10
m_half_open.limit(8);
}
#endif
m_bandwidth_manager[peer_connection::download_channel] = &m_download_channel;
m_bandwidth_manager[peer_connection::upload_channel] = &m_upload_channel;
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#if defined TORRENT_VERBOSE_LOGGING || defined TORRENT_LOGGING || defined TORRENT_ERROR_LOGGING
m_logger = create_log("main_session", listen_port(), false);
(*m_logger) << time_now_string() << "\n";
#endif
#ifdef TORRENT_STATS
m_stats_logger.open("session_stats.log", std::ios::trunc);
m_stats_logger <<
"1. second\n"
"2. upload rate\n"
"3. download rate\n"
"4. downloading torrents\n"
"5. seeding torrents\n"
"6. peers\n"
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"7. connecting peers\n"
"8. disk block buffers\n"
"\n";
m_buffer_usage_logger.open("buffer_stats.log", std::ios::trunc);
m_second_counter = 0;
m_buffer_allocations = 0;
#endif
// ---- generate a peer id ----
static seed_random_generator seeder;
m_key = rand() + (rand() << 15) + (rand() << 30);
std::string print = cl_fprint.to_string();
TORRENT_ASSERT(print.length() <= 20);
// the client's fingerprint
std::copy(
print.begin()
, print.begin() + print.length()
, m_peer_id.begin());
// http-accepted characters:
static char const printable[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz-_.!~*'()";
// the random number
for (unsigned char* i = m_peer_id.begin() + print.length();
i != m_peer_id.end(); ++i)
{
*i = printable[rand() % (sizeof(printable)-1)];
}
asio::error_code ec;
m_timer.expires_from_now(seconds(1), ec);
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m_timer.async_wait(
bind(&session_impl::second_tick, this, _1));
m_thread.reset(new boost::thread(boost::ref(*this)));
}
#ifndef TORRENT_DISABLE_GEO_IP
namespace
{
struct free_ptr
{
void* ptr_;
free_ptr(void* p): ptr_(p) {}
~free_ptr() { free(ptr_); }
};
}
char const* session_impl::country_for_ip(address const& a)
{
if (!a.is_v4() || m_country_db == 0) return 0;
return GeoIP_country_code_by_ipnum(m_country_db, a.to_v4().to_ulong());
}
int session_impl::as_for_ip(address const& a)
{
if (!a.is_v4() || m_asnum_db == 0) return 0;
char* name = GeoIP_name_by_ipnum(m_asnum_db, a.to_v4().to_ulong());
if (name == 0) return 0;
free_ptr p(name);
// GeoIP returns the name as AS??? where ? is the AS-number
return atoi(name + 2);
}
std::string session_impl::as_name_for_ip(address const& a)
{
if (!a.is_v4() || m_asnum_db == 0) return std::string();
char* name = GeoIP_name_by_ipnum(m_asnum_db, a.to_v4().to_ulong());
if (name == 0) return std::string();
free_ptr p(name);
char* tmp = std::strchr(name, ' ');
if (tmp == 0) return std::string();
return tmp + 1;
}
std::pair<const int, int>* session_impl::lookup_as(int as)
{
std::map<int, int>::iterator i = m_as_peak.lower_bound(as);
if (i == m_as_peak.end() || i->first != as)
{
// we don't have any data for this AS, insert a new entry
i = m_as_peak.insert(i, std::pair<int, int>(as, 0));
}
return &(*i);
}
bool session_impl::load_asnum_db(char const* file)
{
mutex_t::scoped_lock l(m_mutex);
if (m_asnum_db) GeoIP_delete(m_asnum_db);
m_asnum_db = GeoIP_open(file, GEOIP_STANDARD);
return m_asnum_db;
}
bool session_impl::load_country_db(char const* file)
{
mutex_t::scoped_lock l(m_mutex);
if (m_country_db) GeoIP_delete(m_country_db);
m_country_db = GeoIP_open(file, GEOIP_STANDARD);
return m_country_db;
}
#endif
void session_impl::load_state(entry const& ses_state)
{
if (ses_state.type() != entry::dictionary_t) return;
mutex_t::scoped_lock l(m_mutex);
#ifndef TORRENT_DISABLE_GEO_IP
entry const* as_map = ses_state.find_key("AS map");
if (as_map && as_map->type() == entry::dictionary_t)
{
entry::dictionary_type const& as_peak = as_map->dict();
for (entry::dictionary_type::const_iterator i = as_peak.begin()
, end(as_peak.end()); i != end; ++i)
{
int as_num = atoi(i->first.c_str());
if (i->second.type() != entry::int_t || i->second.integer() == 0) continue;
int& peak = m_as_peak[as_num];
if (peak < i->second.integer()) peak = i->second.integer();
}
}
#endif
}
entry session_impl::state() const
{
mutex_t::scoped_lock l(m_mutex);
entry ret;
#ifndef TORRENT_DISABLE_GEO_IP
entry::dictionary_type& as_map = ret["AS map"].dict();
char buf[10];
for (std::map<int, int>::const_iterator i = m_as_peak.begin()
, end(m_as_peak.end()); i != end; ++i)
{
if (i->second == 0) continue;
sprintf(buf, "%05d", i->first);
as_map[buf] = i->second;
}
#endif
return ret;
}
#ifndef TORRENT_DISABLE_EXTENSIONS
void session_impl::add_extension(
boost::function<boost::shared_ptr<torrent_plugin>(torrent*, void*)> ext)
{
m_extensions.push_back(ext);
}
#endif
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#ifndef TORRENT_DISABLE_DHT
void session_impl::add_dht_node(udp::endpoint n)
{
if (m_dht) m_dht->add_node(n);
}
#endif
void session_impl::abort()
{
mutex_t::scoped_lock l(m_mutex);
if (m_abort) return;
#if defined(TORRENT_LOGGING)
(*m_logger) << time_now_string() << " *** ABORT CALLED ***\n";
#endif
// abort the main thread
m_abort = true;
if (m_lsd) m_lsd->close();
if (m_upnp) m_upnp->close();
if (m_natpmp) m_natpmp->close();
#ifndef TORRENT_DISABLE_DHT
if (m_dht) m_dht->stop();
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m_dht_socket.close();
#endif
asio::error_code ec;
m_timer.cancel(ec);
// close the listen sockets
for (std::list<listen_socket_t>::iterator i = m_listen_sockets.begin()
, end(m_listen_sockets.end()); i != end; ++i)
{
i->sock->close(ec);
}
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_logger) << time_now_string() << " aborting all torrents (" << m_torrents.size() << ")\n";
#endif
// abort all torrents
for (torrent_map::iterator i = m_torrents.begin()
, end(m_torrents.end()); i != end; ++i)
{
i->second->abort();
}
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
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(*m_logger) << time_now_string() << " aborting all tracker requests\n";
#endif
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m_tracker_manager.abort_all_requests();
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_logger) << time_now_string() << " sending event=stopped to trackers\n";
int counter = 0;
#endif
for (torrent_map::iterator i = m_torrents.begin();
i != m_torrents.end(); ++i)
{
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torrent& t = *i->second;
if ((!t.is_paused() || t.should_request())
&& !t.trackers().empty())
{
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
++counter;
#endif
tracker_request req = t.generate_tracker_request();
TORRENT_ASSERT(req.event == tracker_request::stopped);
req.listen_port = 0;
if (!m_listen_sockets.empty())
req.listen_port = m_listen_sockets.front().external_port;
req.key = m_key;
std::string login = i->second->tracker_login();
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
boost::shared_ptr<tracker_logger> tl(new tracker_logger(*this));
m_tracker_loggers.push_back(tl);
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m_tracker_manager.queue_request(m_io_service, m_half_open, req, login
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, m_listen_interface.address(), tl);
#else
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m_tracker_manager.queue_request(m_io_service, m_half_open, req, login
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, m_listen_interface.address());
#endif
}
}
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
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(*m_logger) << time_now_string() << " sent " << counter << " tracker stop requests\n";
#endif
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#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_logger) << time_now_string() << " aborting all connections (" << m_connections.size() << ")\n";
#endif
// abort all connections
while (!m_connections.empty())
{
#ifndef NDEBUG
int conn = m_connections.size();
#endif
(*m_connections.begin())->disconnect("stopping torrent");
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TORRENT_ASSERT(conn == int(m_connections.size()) + 1);
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}
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_logger) << time_now_string() << " shutting down connection queue\n";
#endif
m_half_open.close();
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m_download_channel.close();
m_upload_channel.close();
}
void session_impl::set_port_filter(port_filter const& f)
{
mutex_t::scoped_lock l(m_mutex);
m_port_filter = f;
}
void session_impl::set_ip_filter(ip_filter const& f)
{
mutex_t::scoped_lock l(m_mutex);
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INVARIANT_CHECK;
m_ip_filter = f;
// Close connections whose endpoint is filtered
// by the new ip-filter
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for (torrent_map::iterator i = m_torrents.begin()
, end(m_torrents.end()); i != end; ++i)
i->second->ip_filter_updated();
}
void session_impl::set_settings(session_settings const& s)
{
mutex_t::scoped_lock l(m_mutex);
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INVARIANT_CHECK;
TORRENT_ASSERT(s.file_pool_size > 0);
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// less than 5 seconds unchoke interval is insane
TORRENT_ASSERT(s.unchoke_interval >= 5);
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if (m_settings.cache_size != s.cache_size)
m_disk_thread.set_cache_size(s.cache_size);
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if (m_settings.cache_expiry != s.cache_expiry)
m_disk_thread.set_cache_size(s.cache_expiry);
m_settings = s;
if (m_settings.connection_speed <= 0) m_settings.connection_speed = 200;
m_files.resize(m_settings.file_pool_size);
if (!s.auto_upload_slots) m_allowed_upload_slots = m_max_uploads;
// replace all occurances of '\n' with ' '.
std::string::iterator i = m_settings.user_agent.begin();
while ((i = std::find(i, m_settings.user_agent.end(), '\n'))
!= m_settings.user_agent.end())
*i = ' ';
}
tcp::endpoint session_impl::get_ipv6_interface() const
{
return m_ipv6_interface;
}
session_impl::listen_socket_t session_impl::setup_listener(tcp::endpoint ep
, int retries, bool v6_only)
{
asio::error_code ec;
listen_socket_t s;
s.sock.reset(new socket_acceptor(m_io_service));
s.sock->open(ep.protocol(), ec);
s.sock->set_option(socket_acceptor::reuse_address(true), ec);
if (ep.protocol() == tcp::v6()) s.sock->set_option(v6only(v6_only), ec);
s.sock->bind(ep, ec);
while (ec && retries > 0)
{
ec = asio::error_code();
TORRENT_ASSERT(!ec);
--retries;
ep.port(ep.port() + 1);
s.sock->bind(ep, ec);
}
if (ec)
{
// instead of giving up, try
// let the OS pick a port
ep.port(0);
ec = asio::error_code();
s.sock->bind(ep, ec);
}
if (ec)
{
// not even that worked, give up
if (m_alerts.should_post(alert::fatal))
{
std::stringstream msg;
msg << "cannot bind to interface '";
print_endpoint(msg, ep) << "' " << ec.message();
m_alerts.post_alert(listen_failed_alert(ep, msg.str()));
}
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
std::stringstream msg;
msg << "cannot bind to interface '";
print_endpoint(msg, ep) << "' " << ec.message();
(*m_logger) << msg.str() << "\n";
#endif
return listen_socket_t();
}
s.external_port = s.sock->local_endpoint(ec).port();
s.sock->listen(0, ec);
if (ec)
{
if (m_alerts.should_post(alert::fatal))
{
std::stringstream msg;
msg << "cannot listen on interface '";
print_endpoint(msg, ep) << "' " << ec.message();
m_alerts.post_alert(listen_failed_alert(ep, msg.str()));
}
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
std::stringstream msg;
msg << "cannot listen on interface '";
print_endpoint(msg, ep) << "' " << ec.message();
(*m_logger) << msg.str() << "\n";
#endif
return listen_socket_t();
}
if (m_alerts.should_post(alert::fatal))
{
std::string msg = "listening on interface "
+ boost::lexical_cast<std::string>(ep);
m_alerts.post_alert(listen_succeeded_alert(ep, msg));
}
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#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_logger) << "listening on: " << ep
<< " external port: " << s.external_port << "\n";
#endif
return s;
}
void session_impl::open_listen_port()
{
// close the open listen sockets
m_listen_sockets.clear();
m_incoming_connection = false;
if (is_any(m_listen_interface.address()))
{
// this means we should open two listen sockets
// one for IPv4 and one for IPv6
listen_socket_t s = setup_listener(
tcp::endpoint(address_v4::any(), m_listen_interface.port())
, m_listen_port_retries);
if (s.sock)
{
m_listen_sockets.push_back(s);
async_accept(s.sock);
}
s = setup_listener(
tcp::endpoint(address_v6::any(), m_listen_interface.port())
, m_listen_port_retries, true);
if (s.sock)
{
m_listen_sockets.push_back(s);
async_accept(s.sock);
}
}
else
{
// we should only open a single listen socket, that
// binds to the given interface
listen_socket_t s = setup_listener(
m_listen_interface, m_listen_port_retries);
if (s.sock)
{
m_listen_sockets.push_back(s);
async_accept(s.sock);
}
}
m_ipv6_interface = tcp::endpoint();
for (std::list<listen_socket_t>::const_iterator i = m_listen_sockets.begin()
, end(m_listen_sockets.end()); i != end; ++i)
{
asio::error_code ec;
tcp::endpoint ep = i->sock->local_endpoint(ec);
if (ec || ep.address().is_v4()) continue;
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if (ep.address().to_v6() != address_v6::any())
{
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// if we're listening on a specific address
// pick it
m_ipv6_interface = ep;
}
else
{
// if we're listening on any IPv6 address, enumerate them and
// pick the first non-local address
std::vector<ip_interface> const& ifs = enum_net_interfaces(m_io_service, ec);
for (std::vector<ip_interface>::const_iterator i = ifs.begin()
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, end(ifs.end()); i != end; ++i)
{
if (i->interface_address.is_v4()
|| i->interface_address.to_v6().is_link_local()
|| i->interface_address.to_v6().is_loopback()) continue;
m_ipv6_interface = tcp::endpoint(i->interface_address, ep.port());
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break;
}
break;
}
}
if (!m_listen_sockets.empty())
{
asio::error_code ec;
tcp::endpoint local = m_listen_sockets.front().sock->local_endpoint(ec);
if (!ec)
{
if (m_natpmp.get())
{
if (m_tcp_mapping[0] != -1) m_natpmp->delete_mapping(m_tcp_mapping[0]);
m_tcp_mapping[0] = m_natpmp->add_mapping(natpmp::tcp
, local.port(), local.port());
}
if (m_upnp.get())
{
if (m_tcp_mapping[1] != -1) m_upnp->delete_mapping(m_tcp_mapping[1]);
m_tcp_mapping[1] = m_upnp->add_mapping(upnp::tcp
, local.port(), local.port());
}
}
2007-09-10 21:10:38 +02:00
}
}
2008-01-18 03:02:18 +01:00
#ifndef TORRENT_DISABLE_DHT
2008-03-25 05:38:59 +01:00
void session_impl::on_receive_udp(asio::error_code const& e
, udp::endpoint const& ep, char const* buf, int len)
2007-12-09 05:15:24 +01:00
{
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if (e)
{
if (m_alerts.should_post(alert::info))
{
std::string msg = "UDP socket error from '"
+ boost::lexical_cast<std::string>(ep) + "' " + e.message();
m_alerts.post_alert(udp_error_alert(ep, msg));
}
return;
}
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if (len > 20 && *buf == 'd' && m_dht)
{
// this is probably a dht message
m_dht->on_receive(ep, buf, len);
}
}
2008-01-18 03:02:18 +01:00
#endif
2007-12-09 05:15:24 +01:00
void session_impl::async_accept(boost::shared_ptr<socket_acceptor> const& listener)
{
shared_ptr<socket_type> c(new socket_type(m_io_service));
c->instantiate<stream_socket>(m_io_service);
listener->async_accept(c->get<stream_socket>()
, bind(&session_impl::on_incoming_connection, this, c
, boost::weak_ptr<socket_acceptor>(listener), _1));
}
void session_impl::on_incoming_connection(shared_ptr<socket_type> const& s
, weak_ptr<socket_acceptor> listen_socket, asio::error_code const& e)
{
boost::shared_ptr<socket_acceptor> listener = listen_socket.lock();
if (!listener) return;
if (e == asio::error::operation_aborted) return;
mutex_t::scoped_lock l(m_mutex);
if (m_abort) return;
asio::error_code ec;
if (e)
{
tcp::endpoint ep = listener->local_endpoint(ec);
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
std::string msg = "error accepting connection on '"
+ boost::lexical_cast<std::string>(ep) + "' " + e.message();
(*m_logger) << msg << "\n";
#endif
#ifdef _WIN32
// Windows sometimes generates this error. It seems to be
// non-fatal and we have to do another async_accept.
if (e.value() == ERROR_SEM_TIMEOUT)
{
async_accept(listener);
return;
}
2008-04-03 06:35:56 +02:00
#endif
#ifdef TORRENT_BSD
// Leopard sometimes generates an "invalid argument" error. It seems to be
// non-fatal and we have to do another async_accept.
if (e.value() == EINVAL)
{
async_accept(listener);
return;
}
#endif
if (m_alerts.should_post(alert::fatal))
{
std::string msg = "error accepting connection on '"
+ boost::lexical_cast<std::string>(ep) + "' " + e.message();
m_alerts.post_alert(listen_failed_alert(ep, msg));
}
return;
}
async_accept(listener);
// we got a connection request!
tcp::endpoint endp = s->remote_endpoint(ec);
if (ec)
{
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_logger) << endp << " <== INCOMING CONNECTION FAILED, could "
"not retrieve remote endpoint " << ec.message() << "\n";
#endif
return;
}
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
2007-12-19 22:36:54 +01:00
(*m_logger) << time_now_string() << " <== INCOMING CONNECTION " << endp << "\n";
#endif
// local addresses do not count, since it's likely
// coming from our own client through local service discovery
// and it does not reflect whether or not a router is open
// for incoming connections or not.
if (!is_local(endp.address()))
m_incoming_connection = true;
if (m_ip_filter.access(endp.address()) & ip_filter::blocked)
{
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_logger) << "filtered blocked ip\n";
#endif
if (m_alerts.should_post(alert::info))
{
m_alerts.post_alert(peer_blocked_alert(endp.address()
, "incoming connection blocked by IP filter"));
}
return;
}
2007-10-27 23:21:44 +02:00
// don't allow more connections than the max setting
2008-01-18 02:29:28 +01:00
if (num_connections() >= max_connections())
2007-10-27 23:21:44 +02:00
{
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_logger) << "number of connections limit exceeded (conns: "
<< num_connections() << ", limit: " << max_connections()
<< "), connection rejected\n";
#endif
return;
}
2007-09-04 00:27:52 +02:00
// check if we have any active torrents
// if we don't reject the connection
if (m_torrents.empty()) return;
bool has_active_torrent = false;
for (torrent_map::iterator i = m_torrents.begin()
, end(m_torrents.end()); i != end; ++i)
2007-09-04 00:27:52 +02:00
{
if (!i->second->is_paused())
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{
has_active_torrent = true;
break;
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}
}
if (!has_active_torrent) return;
2007-09-04 00:27:52 +02:00
boost::intrusive_ptr<peer_connection> c(
new bt_peer_connection(*this, s, 0));
#ifndef NDEBUG
c->m_in_constructor = false;
#endif
if (!c->is_disconnecting())
{
m_connections.insert(c);
c->start();
}
}
void session_impl::close_connection(peer_connection const* p
, char const* message)
{
mutex_t::scoped_lock l(m_mutex);
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// too expensive
// INVARIANT_CHECK;
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#ifndef NDEBUG
// for (aux::session_impl::torrent_map::const_iterator i = m_torrents.begin()
// , end(m_torrents.end()); i != end; ++i)
// TORRENT_ASSERT(!i->second->has_peer((peer_connection*)p));
#endif
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#if defined(TORRENT_LOGGING)
(*m_logger) << time_now_string() << " CLOSING CONNECTION "
<< p->remote() << " : " << message << "\n";
2007-12-19 22:36:54 +01:00
#endif
TORRENT_ASSERT(p->is_disconnecting());
if (!p->is_choked()) --m_num_unchoked;
// connection_map::iterator i = std::lower_bound(m_connections.begin(), m_connections.end()
// , p, bind(&boost::intrusive_ptr<peer_connection>::get, _1) < p);
// if (i->get() != p) i == m_connections.end();
connection_map::iterator i = std::find_if(m_connections.begin(), m_connections.end()
, bind(&boost::intrusive_ptr<peer_connection>::get, _1) == p);
if (i != m_connections.end()) m_connections.erase(i);
}
void session_impl::set_peer_id(peer_id const& id)
{
mutex_t::scoped_lock l(m_mutex);
m_peer_id = id;
}
void session_impl::set_key(int key)
{
mutex_t::scoped_lock l(m_mutex);
m_key = key;
}
int session_impl::next_port()
{
std::pair<int, int> const& out_ports = m_settings.outgoing_ports;
if (m_next_port < out_ports.first || m_next_port > out_ports.second)
m_next_port = out_ports.first;
int port = m_next_port;
++m_next_port;
if (m_next_port > out_ports.second) m_next_port = out_ports.first;
#if defined TORRENT_LOGGING
(*m_logger) << time_now_string() << " *** BINDING OUTGOING CONNECTION [ "
"port: " << port << " ]\n";
#endif
return port;
}
void session_impl::second_tick(asio::error_code const& e)
{
session_impl::mutex_t::scoped_lock l(m_mutex);
// too expensive
// INVARIANT_CHECK;
2007-08-21 20:33:28 +02:00
if (m_abort) return;
if (e)
{
#if defined TORRENT_LOGGING
(*m_logger) << "*** SECOND TIMER FAILED " << e.message() << "\n";
#endif
::abort();
return;
}
float tick_interval = total_microseconds(time_now() - m_last_tick) / 1000000.f;
m_last_tick = time_now();
asio::error_code ec;
m_timer.expires_from_now(seconds(1), ec);
2008-01-08 06:47:43 +01:00
m_timer.async_wait(
bind(&session_impl::second_tick, this, _1));
#ifdef TORRENT_STATS
++m_second_counter;
int downloading_torrents = 0;
int seeding_torrents = 0;
for (torrent_map::iterator i = m_torrents.begin()
, end(m_torrents.end()); i != end; ++i)
{
if (i->second->is_seed())
++seeding_torrents;
else
++downloading_torrents;
}
int num_complete_connections = 0;
2007-05-14 06:01:30 +02:00
int num_half_open = 0;
for (connection_map::iterator i = m_connections.begin()
, end(m_connections.end()); i != end; ++i)
{
if ((*i)->is_connecting())
2007-05-14 06:01:30 +02:00
++num_half_open;
else
++num_complete_connections;
2007-05-14 06:01:30 +02:00
}
m_stats_logger
<< m_second_counter << "\t"
<< m_stat.upload_rate() << "\t"
<< m_stat.download_rate() << "\t"
<< downloading_torrents << "\t"
<< seeding_torrents << "\t"
<< num_complete_connections << "\t"
2007-05-14 06:01:30 +02:00
<< num_half_open << "\t"
<< m_disk_thread.disk_allocations() << "\t"
2007-05-14 06:01:30 +02:00
<< std::endl;
#endif
// --------------------------------------------------------------
// second_tick every torrent
// --------------------------------------------------------------
int congested_torrents = 0;
int uncongested_torrents = 0;
// count the number of seeding torrents vs. downloading
// torrents we are running
int num_seeds = 0;
int num_downloads = 0;
// count the number of peers of downloading torrents
int num_downloads_peers = 0;
// check each torrent for tracker updates
// TODO: do this in a timer-event in each torrent instead
for (torrent_map::iterator i = m_torrents.begin();
i != m_torrents.end();)
{
torrent& t = *i->second;
TORRENT_ASSERT(!t.is_aborted());
if (t.bandwidth_queue_size(peer_connection::upload_channel))
++congested_torrents;
else
++uncongested_torrents;
if (t.is_finished())
{
++num_seeds;
}
else
{
++num_downloads;
num_downloads_peers += t.num_peers();
}
if (t.should_request())
{
tracker_request req = t.generate_tracker_request();
req.listen_port = 0;
if (!m_listen_sockets.empty())
req.listen_port = m_listen_sockets.front().external_port;
req.key = m_key;
m_tracker_manager.queue_request(m_io_service, m_half_open, req
, t.tracker_login(), m_listen_interface.address(), i->second);
if (m_alerts.should_post(alert::info))
{
m_alerts.post_alert(
tracker_announce_alert(
t.get_handle(), "tracker announce"));
}
}
t.second_tick(m_stat, tick_interval);
++i;
}
m_stat.second_tick(tick_interval);
// --------------------------------------------------------------
// connect new peers
// --------------------------------------------------------------
// let torrents connect to peers if they want to
// if there are any torrents and any free slots
// this loop will "hand out" max(connection_speed
// , half_open.free_slots()) to the torrents, in a
// round robin fashion, so that every torrent is
// equallt likely to connect to a peer
int free_slots = m_half_open.free_slots();
if (!m_torrents.empty()
&& free_slots > -m_half_open.limit()
&& num_connections() < m_max_connections)
{
// this is the maximum number of connections we will
// attempt this tick
int max_connections = m_settings.connection_speed;
int average_peers = 0;
if (num_downloads > 0)
average_peers = num_downloads_peers / num_downloads;
torrent_map::iterator i = m_torrents.begin();
if (m_next_connect_torrent < int(m_torrents.size()))
std::advance(i, m_next_connect_torrent);
else
m_next_connect_torrent = 0;
int steps_since_last_connect = 0;
int num_torrents = int(m_torrents.size());
for (;;)
{
torrent& t = *i->second;
if (t.want_more_peers())
{
int connect_points = 100;
// have a bias against torrents with more peers
// than average
if (!t.is_seed() && t.num_peers() > average_peers)
connect_points /= 2;
// if this is a seed and there is a torrent that
// is downloading, lower the rate at which this
// torrent gets connections.
// dividing by num_seeds will have the effect
// that all seed will get as many connections
// together, as a single downloading torrent.
if (t.is_seed() && num_downloads > 0)
connect_points /= num_seeds + 1;
if (connect_points <= 0) connect_points = 1;
t.give_connect_points(connect_points);
try
{
if (t.try_connect_peer())
{
--max_connections;
--free_slots;
steps_since_last_connect = 0;
}
}
catch (std::bad_alloc&)
{
// we ran out of memory trying to connect to a peer
// lower the global limit to the number of peers
// we already have
m_max_connections = num_connections();
if (m_max_connections < 2) m_max_connections = 2;
}
}
++m_next_connect_torrent;
++steps_since_last_connect;
++i;
if (i == m_torrents.end())
{
TORRENT_ASSERT(m_next_connect_torrent == num_torrents);
i = m_torrents.begin();
m_next_connect_torrent = 0;
}
// if we have gone two whole loops without
// handing out a single connection, break
if (steps_since_last_connect > num_torrents * 2) break;
// if there are no more free connection slots, abort
if (free_slots <= -m_half_open.limit()) break;
// if we should not make any more connections
// attempts this tick, abort
if (max_connections == 0) break;
// maintain the global limit on number of connections
if (num_connections() >= m_max_connections) break;
}
}
// do the second_tick() on each connection
// this will update their statistics (download and upload speeds)
// also purge sockets that have timed out
// and keep sockets open by keeping them alive.
for (connection_map::iterator i = m_connections.begin();
i != m_connections.end();)
{
// we need to do like this because j->second->disconnect() will
// erase the connection from the map we're iterating
connection_map::iterator j = i;
++i;
// if this socket has timed out
// close it.
peer_connection& c = *j->get();
if (c.has_timed_out())
{
if (m_alerts.should_post(alert::debug))
{
m_alerts.post_alert(
peer_error_alert(
c.remote()
, c.pid()
, "connection timed out"));
}
#if defined(TORRENT_VERBOSE_LOGGING)
(*c.m_logger) << "*** CONNECTION TIMED OUT\n";
#endif
c.set_failed();
c.disconnect("timed out");
continue;
}
c.keep_alive();
}
// --------------------------------------------------------------
// unchoke set and optimistic unchoke calculations
// --------------------------------------------------------------
m_unchoke_time_scaler--;
if (m_unchoke_time_scaler <= 0 && !m_connections.empty())
{
m_unchoke_time_scaler = settings().unchoke_interval;
std::vector<peer_connection*> peers;
for (connection_map::iterator i = m_connections.begin()
, end(m_connections.end()); i != end; ++i)
{
peer_connection* p = i->get();
torrent* t = p->associated_torrent().lock().get();
if (!p->peer_info_struct()
2007-08-17 09:37:08 +02:00
|| t == 0
|| !p->is_peer_interested()
|| p->is_disconnecting()
|| p->is_connecting()
|| (p->share_diff() < -free_upload_amount
2007-08-17 09:37:08 +02:00
&& !t->is_seed()))
{
if (!(*i)->is_choked() && t)
2007-08-22 20:50:53 +02:00
{
policy::peer* pi = p->peer_info_struct();
if (pi && pi->optimistically_unchoked)
{
pi->optimistically_unchoked = false;
// force a new optimistic unchoke
m_optimistic_unchoke_time_scaler = 0;
}
t->choke_peer(*(*i));
2007-08-22 20:50:53 +02:00
}
continue;
}
peers.push_back(i->get());
}
2008-03-10 04:30:01 +01:00
// sorts the peers that are eligible for unchoke by download rate and secondary
// by total upload. The reason for this is, if all torrents are being seeded,
// the download rate will be 0, and the peers we have sent the least to should
// be unchoked
std::sort(peers.begin(), peers.end()
2008-03-10 04:30:01 +01:00
, bind(&peer_connection::unchoke_compare, _1, _2));
2008-03-10 04:30:01 +01:00
std::for_each(m_connections.begin(), m_connections.end()
, bind(&peer_connection::reset_choke_counters, _1));
// auto unchoke
int upload_limit = m_bandwidth_manager[peer_connection::upload_channel]->throttle();
if (m_settings.auto_upload_slots && upload_limit != bandwidth_limit::inf)
{
// if our current upload rate is less than 90% of our
// limit AND most torrents are not "congested", i.e.
// they are not holding back because of a per-torrent
// limit
if (m_stat.upload_rate() < upload_limit * 0.9f
2008-01-15 09:37:48 +01:00
&& m_allowed_upload_slots <= m_num_unchoked + 1
&& congested_torrents < uncongested_torrents)
{
++m_allowed_upload_slots;
}
2008-01-17 22:34:00 +01:00
else if (m_upload_channel.queue_size() > 1
&& m_allowed_upload_slots > m_max_uploads)
{
--m_allowed_upload_slots;
}
}
// reserve one upload slot for optimistic unchokes
int unchoke_set_size = m_allowed_upload_slots - 1;
m_num_unchoked = 0;
// go through all the peers and unchoke the first ones and choke
// all the other ones.
for (std::vector<peer_connection*>::iterator i = peers.begin()
, end(peers.end()); i != end; ++i)
{
peer_connection* p = *i;
TORRENT_ASSERT(p);
2007-08-17 09:37:08 +02:00
torrent* t = p->associated_torrent().lock().get();
TORRENT_ASSERT(t);
if (unchoke_set_size > 0)
{
2007-08-17 09:37:08 +02:00
if (p->is_choked())
{
2007-08-19 10:32:39 +02:00
if (!t->unchoke_peer(*p))
continue;
2007-08-17 09:37:08 +02:00
}
2007-08-19 10:32:39 +02:00
--unchoke_set_size;
++m_num_unchoked;
2007-08-17 09:37:08 +02:00
TORRENT_ASSERT(p->peer_info_struct());
if (p->peer_info_struct()->optimistically_unchoked)
{
// force a new optimistic unchoke
m_optimistic_unchoke_time_scaler = 0;
p->peer_info_struct()->optimistically_unchoked = false;
}
}
else
{
TORRENT_ASSERT(p->peer_info_struct());
if (!p->is_choked() && !p->peer_info_struct()->optimistically_unchoked)
2007-08-17 09:37:08 +02:00
t->choke_peer(*p);
2007-08-21 23:51:29 +02:00
if (!p->is_choked())
++m_num_unchoked;
}
}
m_optimistic_unchoke_time_scaler--;
if (m_optimistic_unchoke_time_scaler <= 0)
{
m_optimistic_unchoke_time_scaler
= settings().optimistic_unchoke_multiplier;
// find the peer that has been waiting the longest to be optimistically
// unchoked
connection_map::iterator current_optimistic_unchoke = m_connections.end();
connection_map::iterator optimistic_unchoke_candidate = m_connections.end();
ptime last_unchoke = max_time();
for (connection_map::iterator i = m_connections.begin()
, end(m_connections.end()); i != end; ++i)
{
peer_connection* p = i->get();
TORRENT_ASSERT(p);
policy::peer* pi = p->peer_info_struct();
if (!pi) continue;
2007-08-17 09:37:08 +02:00
torrent* t = p->associated_torrent().lock().get();
if (!t) continue;
if (pi->optimistically_unchoked)
{
TORRENT_ASSERT(!p->is_choked());
TORRENT_ASSERT(current_optimistic_unchoke == m_connections.end());
current_optimistic_unchoke = i;
}
2007-08-17 09:37:08 +02:00
if (pi->last_optimistically_unchoked < last_unchoke
&& !p->is_connecting()
&& !p->is_disconnecting()
2007-08-17 09:37:08 +02:00
&& p->is_peer_interested()
&& t->free_upload_slots()
&& p->is_choked())
{
last_unchoke = pi->last_optimistically_unchoked;
optimistic_unchoke_candidate = i;
}
}
if (optimistic_unchoke_candidate != m_connections.end()
&& optimistic_unchoke_candidate != current_optimistic_unchoke)
{
if (current_optimistic_unchoke != m_connections.end())
{
torrent* t = (*current_optimistic_unchoke)->associated_torrent().lock().get();
TORRENT_ASSERT(t);
(*current_optimistic_unchoke)->peer_info_struct()->optimistically_unchoked = false;
t->choke_peer(*current_optimistic_unchoke->get());
}
2007-08-21 23:51:29 +02:00
else
{
++m_num_unchoked;
}
torrent* t = (*optimistic_unchoke_candidate)->associated_torrent().lock().get();
TORRENT_ASSERT(t);
bool ret = t->unchoke_peer(*optimistic_unchoke_candidate->get());
TORRENT_ASSERT(ret);
(*optimistic_unchoke_candidate)->peer_info_struct()->optimistically_unchoked = true;
}
}
}
// --------------------------------------------------------------
// disconnect peers when we have too many
// --------------------------------------------------------------
--m_disconnect_time_scaler;
if (m_disconnect_time_scaler <= 0)
{
2008-04-22 02:05:23 +02:00
m_disconnect_time_scaler = 90;
// every 60 seconds, disconnect the worst peer
// if we have reached the connection limit
if (num_connections() >= max_connections() && !m_torrents.empty())
{
torrent_map::iterator i = std::max_element(m_torrents.begin(), m_torrents.end()
2007-09-08 20:18:09 +02:00
, bind(&torrent::num_peers, bind(&torrent_map::value_type::second, _1))
< bind(&torrent::num_peers, bind(&torrent_map::value_type::second, _2)));
TORRENT_ASSERT(i != m_torrents.end());
2008-04-22 02:05:23 +02:00
// TODO: make the number of peers a percentage of the number of connected peers
i->second->get_policy().disconnect_one_peer();
}
}
}
void session_impl::operator()()
{
eh_initializer();
{
session_impl::mutex_t::scoped_lock l(m_mutex);
if (m_listen_interface.port() != 0) open_listen_port();
}
ptime timer = time_now();
do
{
#ifndef BOOST_NO_EXCEPTIONS
try
{
#endif
m_io_service.run();
TORRENT_ASSERT(m_abort == true);
#ifndef BOOST_NO_EXCEPTIONS
}
catch (std::exception& e)
{
#ifndef NDEBUG
std::cerr << e.what() << "\n";
std::string err = e.what();
#endif
TORRENT_ASSERT(false);
}
#endif
}
while (!m_abort);
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_logger) << time_now_string() << " locking mutex\n";
#endif
session_impl::mutex_t::scoped_lock l(m_mutex);
/*
#ifndef NDEBUG
for (torrent_map::iterator i = m_torrents.begin();
i != m_torrents.end(); ++i)
{
TORRENT_ASSERT(i->second->num_peers() == 0);
}
#endif
*/
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_logger) << time_now_string() << " cleaning up torrents\n";
#endif
m_torrents.clear();
TORRENT_ASSERT(m_torrents.empty());
TORRENT_ASSERT(m_connections.empty());
}
// the return value from this function is valid only as long as the
// session is locked!
boost::weak_ptr<torrent> session_impl::find_torrent(sha1_hash const& info_hash)
{
std::map<sha1_hash, boost::shared_ptr<torrent> >::iterator i
= m_torrents.find(info_hash);
#ifndef NDEBUG
for (std::map<sha1_hash, boost::shared_ptr<torrent> >::iterator j
= m_torrents.begin(); j != m_torrents.end(); ++j)
{
torrent* p = boost::get_pointer(j->second);
TORRENT_ASSERT(p);
}
#endif
if (i != m_torrents.end()) return i->second;
return boost::weak_ptr<torrent>();
}
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#if defined TORRENT_VERBOSE_LOGGING || defined TORRENT_LOGGING || defined TORRENT_ERROR_LOGGING
boost::shared_ptr<logger> session_impl::create_log(std::string const& name
, int instance, bool append)
{
// current options are file_logger, cout_logger and null_logger
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return boost::shared_ptr<logger>(new logger(m_logpath, name + ".log", instance, append));
}
#endif
std::vector<torrent_handle> session_impl::get_torrents()
{
mutex_t::scoped_lock l(m_mutex);
std::vector<torrent_handle> ret;
for (session_impl::torrent_map::iterator i
= m_torrents.begin(), end(m_torrents.end());
i != end; ++i)
{
if (i->second->is_aborted()) continue;
ret.push_back(torrent_handle(i->second));
}
return ret;
}
torrent_handle session_impl::find_torrent_handle(sha1_hash const& info_hash)
{
return torrent_handle(find_torrent(info_hash));
}
torrent_handle session_impl::add_torrent(
boost::intrusive_ptr<torrent_info> ti
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, fs::path const& save_path
, entry const& resume_data
, storage_mode_t storage_mode
, storage_constructor_type sc
, bool paused
, void* userdata)
{
TORRENT_ASSERT(!save_path.empty());
if (ti->begin_files() == ti->end_files())
{
#ifndef BOOST_NO_EXCEPTIONS
throw std::runtime_error("no files in torrent");
#else
return torrent_handle();
#endif
}
// lock the session and the checker thread (the order is important!)
mutex_t::scoped_lock l(m_mutex);
// INVARIANT_CHECK;
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if (is_aborted())
{
#ifndef BOOST_NO_EXCEPTIONS
throw std::runtime_error("session is closing");
#else
return torrent_handle();
#endif
}
// is the torrent already active?
if (!find_torrent(ti->info_hash()).expired())
{
#ifndef BOOST_NO_EXCEPTIONS
throw duplicate_torrent();
#else
return torrent_handle();
#endif
}
// create the torrent and the data associated with
// the checker thread and store it before starting
// the thread
boost::shared_ptr<torrent> torrent_ptr(
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new torrent(*this, ti, save_path
, m_listen_interface, storage_mode, 16 * 1024
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, sc, paused, resume_data));
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torrent_ptr->start();
#ifndef TORRENT_DISABLE_EXTENSIONS
for (extension_list_t::iterator i = m_extensions.begin()
, end(m_extensions.end()); i != end; ++i)
{
boost::shared_ptr<torrent_plugin> tp((*i)(torrent_ptr.get(), userdata));
if (tp) torrent_ptr->add_extension(tp);
}
#endif
#ifndef TORRENT_DISABLE_DHT
if (m_dht)
{
torrent_info::nodes_t const& nodes = ti->nodes();
std::for_each(nodes.begin(), nodes.end(), bind(
(void(dht::dht_tracker::*)(std::pair<std::string, int> const&))
&dht::dht_tracker::add_node
, boost::ref(m_dht), _1));
}
#endif
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m_torrents.insert(std::make_pair(ti->info_hash(), torrent_ptr));
return torrent_handle(torrent_ptr);
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}
void session_impl::check_torrent(boost::shared_ptr<torrent> const& t)
{
if (m_queued_for_checking.empty()) t->start_checking();
m_queued_for_checking.push_back(t);
}
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void session_impl::done_checking(boost::shared_ptr<torrent> const& t)
{
TORRENT_ASSERT(m_queued_for_checking.front() == t);
m_queued_for_checking.pop_front();
if (!m_queued_for_checking.empty())
m_queued_for_checking.front()->start_checking();
}
torrent_handle session_impl::add_torrent(
char const* tracker_url
, sha1_hash const& info_hash
, char const* name
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, fs::path const& save_path
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, entry const& resume_data
, storage_mode_t storage_mode
, storage_constructor_type sc
, bool paused
, void* userdata)
{
// TODO: support resume data in this case
TORRENT_ASSERT(!save_path.empty());
// lock the session
session_impl::mutex_t::scoped_lock l(m_mutex);
// INVARIANT_CHECK;
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// is the torrent already active?
if (!find_torrent(info_hash).expired())
{
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#ifndef BOOST_NO_EXCEPTIONS
throw duplicate_torrent();
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#else
return torrent_handle();
#endif
}
// you cannot add new torrents to a session that is closing down
TORRENT_ASSERT(!is_aborted());
// create the torrent and the data associated with
// the checker thread and store it before starting
// the thread
boost::shared_ptr<torrent> torrent_ptr(
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new torrent(*this, tracker_url, info_hash, name
, save_path, m_listen_interface, storage_mode, 16 * 1024
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, sc, paused, resume_data));
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torrent_ptr->start();
#ifndef TORRENT_DISABLE_EXTENSIONS
for (extension_list_t::iterator i = m_extensions.begin()
, end(m_extensions.end()); i != end; ++i)
{
boost::shared_ptr<torrent_plugin> tp((*i)(torrent_ptr.get(), userdata));
if (tp) torrent_ptr->add_extension(tp);
}
#endif
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m_torrents.insert(std::make_pair(info_hash, torrent_ptr));
return torrent_handle(torrent_ptr);
}
void session_impl::remove_torrent(const torrent_handle& h, int options)
{
boost::shared_ptr<torrent> tptr = h.m_torrent.lock();
if (!tptr)
#ifdef BOOST_NO_EXCEPTIONS
return;
#else
throw invalid_handle();
#endif
mutex_t::scoped_lock l(m_mutex);
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INVARIANT_CHECK;
session_impl::torrent_map::iterator i =
m_torrents.find(tptr->torrent_file().info_hash());
if (i != m_torrents.end())
{
torrent& t = *i->second;
if (options & session::delete_files)
t.delete_files();
t.abort();
if ((!t.is_paused() || t.should_request())
&& !t.trackers().empty())
{
tracker_request req = t.generate_tracker_request();
TORRENT_ASSERT(req.event == tracker_request::stopped);
req.listen_port = 0;
if (!m_listen_sockets.empty())
req.listen_port = m_listen_sockets.front().external_port;
req.key = m_key;
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
boost::shared_ptr<tracker_logger> tl(new tracker_logger(*this));
m_tracker_loggers.push_back(tl);
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m_tracker_manager.queue_request(m_io_service, m_half_open, req
, t.tracker_login(), m_listen_interface.address(), tl);
#else
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m_tracker_manager.queue_request(m_io_service, m_half_open, req
, t.tracker_login(), m_listen_interface.address());
#endif
if (m_alerts.should_post(alert::info))
{
m_alerts.post_alert(
tracker_announce_alert(
t.get_handle(), "tracker announce, event=stopped"));
}
}
#ifndef NDEBUG
sha1_hash i_hash = t.torrent_file().info_hash();
#endif
m_torrents.erase(i);
TORRENT_ASSERT(m_torrents.find(i_hash) == m_torrents.end());
return;
}
}
bool session_impl::listen_on(
std::pair<int, int> const& port_range
, const char* net_interface)
{
session_impl::mutex_t::scoped_lock l(m_mutex);
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INVARIANT_CHECK;
tcp::endpoint new_interface;
if (net_interface && std::strlen(net_interface) > 0)
new_interface = tcp::endpoint(address::from_string(net_interface), port_range.first);
else
new_interface = tcp::endpoint(address_v4::any(), port_range.first);
m_listen_port_retries = port_range.second - port_range.first;
// if the interface is the same and the socket is open
// don't do anything
if (new_interface == m_listen_interface
&& !m_listen_sockets.empty()) return true;
m_listen_interface = new_interface;
open_listen_port();
bool new_listen_address = m_listen_interface.address() != new_interface.address();
#ifndef TORRENT_DISABLE_DHT
if ((new_listen_address || m_dht_same_port) && m_dht)
{
if (m_dht_same_port)
m_dht_settings.service_port = new_interface.port();
// the listen interface changed, rebind the dht listen socket as well
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m_dht_socket.bind(m_dht_settings.service_port);
if (m_natpmp.get())
{
if (m_udp_mapping[0] != -1) m_natpmp->delete_mapping(m_udp_mapping[0]);
m_udp_mapping[0] = m_natpmp->add_mapping(natpmp::tcp
, m_dht_settings.service_port
, m_dht_settings.service_port);
}
if (m_upnp.get())
{
if (m_udp_mapping[1] != -1) m_upnp->delete_mapping(m_udp_mapping[1]);
m_udp_mapping[1] = m_upnp->add_mapping(upnp::tcp
, m_dht_settings.service_port
, m_dht_settings.service_port);
}
}
#endif
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#if defined TORRENT_VERBOSE_LOGGING || defined TORRENT_LOGGING || defined TORRENT_ERROR_LOGGING
m_logger = create_log("main_session", listen_port(), false);
(*m_logger) << time_now_string() << "\n";
#endif
return !m_listen_sockets.empty();
}
unsigned short session_impl::listen_port() const
{
mutex_t::scoped_lock l(m_mutex);
if (m_listen_sockets.empty()) return 0;
return m_listen_sockets.front().external_port;;
}
void session_impl::announce_lsd(sha1_hash const& ih)
{
mutex_t::scoped_lock l(m_mutex);
// use internal listen port for local peers
if (m_lsd.get())
m_lsd->announce(ih, m_listen_interface.port());
}
void session_impl::on_lsd_peer(tcp::endpoint peer, sha1_hash const& ih)
{
mutex_t::scoped_lock l(m_mutex);
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INVARIANT_CHECK;
boost::shared_ptr<torrent> t = find_torrent(ih).lock();
if (!t) return;
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// don't add peers from lsd to private torrents
if (t->torrent_file().priv()) return;
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_logger) << time_now_string()
<< ": added peer from local discovery: " << peer << "\n";
#endif
t->get_policy().peer_from_tracker(peer, peer_id(0), peer_info::lsd, 0);
}
void session_impl::on_port_mapping(int mapping, int port
, std::string const& errmsg, int map_transport)
{
#ifndef TORRENT_DISABLE_DHT
if (mapping == m_udp_mapping[map_transport] && port != 0)
{
m_external_udp_port = port;
m_dht_settings.service_port = port;
if (m_alerts.should_post(alert::info))
m_alerts.post_alert(portmap_alert(mapping, port
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, map_transport, "successfully mapped UDP port"));
return;
}
#endif
if (mapping == m_tcp_mapping[map_transport] && port != 0)
{
if (!m_listen_sockets.empty())
m_listen_sockets.front().external_port = port;
if (m_alerts.should_post(alert::info))
m_alerts.post_alert(portmap_alert(mapping, port
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, map_transport, "successfully mapped TCP port"));
return;
}
if (!errmsg.empty())
{
if (m_alerts.should_post(alert::warning))
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m_alerts.post_alert(portmap_error_alert(mapping
, map_transport, errmsg));
}
else
{
if (m_alerts.should_post(alert::warning))
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m_alerts.post_alert(portmap_alert(mapping, port
, map_transport, "successfully mapped port"));
}
}
session_status session_impl::status() const
{
mutex_t::scoped_lock l(m_mutex);
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// INVARIANT_CHECK;
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session_status s;
s.num_peers = (int)m_connections.size();
s.num_unchoked = m_num_unchoked;
s.allowed_upload_slots = m_allowed_upload_slots;
s.up_bandwidth_queue = m_upload_channel.queue_size();
s.down_bandwidth_queue = m_download_channel.queue_size();
s.has_incoming_connections = m_incoming_connection;
s.download_rate = m_stat.download_rate();
s.upload_rate = m_stat.upload_rate();
s.payload_download_rate = m_stat.download_payload_rate();
s.payload_upload_rate = m_stat.upload_payload_rate();
s.total_download = m_stat.total_protocol_download()
+ m_stat.total_payload_download();
s.total_upload = m_stat.total_protocol_upload()
+ m_stat.total_payload_upload();
s.total_payload_download = m_stat.total_payload_download();
s.total_payload_upload = m_stat.total_payload_upload();
#ifndef TORRENT_DISABLE_DHT
if (m_dht)
{
m_dht->dht_status(s);
}
else
{
s.dht_nodes = 0;
s.dht_node_cache = 0;
s.dht_torrents = 0;
s.dht_global_nodes = 0;
}
#endif
return s;
}
#ifndef TORRENT_DISABLE_DHT
void session_impl::start_dht(entry const& startup_state)
{
mutex_t::scoped_lock l(m_mutex);
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INVARIANT_CHECK;
if (m_dht)
{
m_dht->stop();
m_dht = 0;
}
if (m_dht_settings.service_port == 0
|| m_dht_same_port)
{
m_dht_same_port = true;
// if you hit this assert you are trying to start the
// DHT with the same port as the tcp listen port
// (which is default) _before_ you have opened the
// tcp listen port (so there is no configured port to use)
// basically, make sure you call listen_on() before
// start_dht(). See documentation for listen_on() for
// more information.
TORRENT_ASSERT(m_listen_interface.port() > 0);
m_dht_settings.service_port = m_listen_interface.port();
}
m_external_udp_port = m_dht_settings.service_port;
if (m_natpmp.get() && m_udp_mapping[0] == -1)
{
m_udp_mapping[0] = m_natpmp->add_mapping(natpmp::udp
, m_dht_settings.service_port
, m_dht_settings.service_port);
}
if (m_upnp.get() && m_udp_mapping[1] == -1)
{
m_udp_mapping[1] = m_upnp->add_mapping(upnp::udp
, m_dht_settings.service_port
, m_dht_settings.service_port);
}
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m_dht = new dht::dht_tracker(m_dht_socket, m_dht_settings, startup_state);
if (!m_dht_socket.is_open() || m_dht_socket.local_port() != m_dht_settings.service_port)
{
m_dht_socket.bind(m_dht_settings.service_port);
}
}
void session_impl::stop_dht()
{
mutex_t::scoped_lock l(m_mutex);
if (!m_dht) return;
m_dht->stop();
m_dht = 0;
}
void session_impl::set_dht_settings(dht_settings const& settings)
{
mutex_t::scoped_lock l(m_mutex);
// only change the dht listen port in case the settings
// contains a vaiid port, and if it is different from
// the current setting
if (settings.service_port != 0)
m_dht_same_port = false;
else
m_dht_same_port = true;
if (!m_dht_same_port
&& settings.service_port != m_dht_settings.service_port
&& m_dht)
{
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m_dht_socket.bind(settings.service_port);
if (m_natpmp.get())
{
if (m_udp_mapping[0] != -1) m_upnp->delete_mapping(m_udp_mapping[0]);
m_udp_mapping[0] = m_natpmp->add_mapping(natpmp::udp
, m_dht_settings.service_port
, m_dht_settings.service_port);
}
if (m_upnp.get())
{
if (m_udp_mapping[1] != -1) m_upnp->delete_mapping(m_udp_mapping[1]);
m_udp_mapping[1] = m_upnp->add_mapping(upnp::udp
, m_dht_settings.service_port
, m_dht_settings.service_port);
}
m_external_udp_port = settings.service_port;
}
m_dht_settings = settings;
if (m_dht_same_port)
m_dht_settings.service_port = m_listen_interface.port();
}
entry session_impl::dht_state() const
{
mutex_t::scoped_lock l(m_mutex);
if (!m_dht) return entry();
return m_dht->state();
}
void session_impl::add_dht_node(std::pair<std::string, int> const& node)
{
TORRENT_ASSERT(m_dht);
mutex_t::scoped_lock l(m_mutex);
m_dht->add_node(node);
}
void session_impl::add_dht_router(std::pair<std::string, int> const& node)
{
TORRENT_ASSERT(m_dht);
mutex_t::scoped_lock l(m_mutex);
m_dht->add_router_node(node);
}
#endif
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#ifndef TORRENT_DISABLE_ENCRYPTION
void session_impl::set_pe_settings(pe_settings const& settings)
{
mutex_t::scoped_lock l(m_mutex);
m_pe_settings = settings;
}
#endif
bool session_impl::is_listening() const
{
mutex_t::scoped_lock l(m_mutex);
return !m_listen_sockets.empty();
}
session_impl::~session_impl()
{
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#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_logger) << time_now_string() << "\n\n *** shutting down session *** \n\n";
#endif
abort();
#ifndef TORRENT_DISABLE_GEO_IP
if (m_asnum_db) GeoIP_delete(m_asnum_db);
if (m_country_db) GeoIP_delete(m_country_db);
#endif
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#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_logger) << time_now_string() << " waiting for main thread\n";
#endif
m_thread->join();
TORRENT_ASSERT(m_torrents.empty());
#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_logger) << time_now_string() << " waiting for disk io thread\n";
#endif
m_disk_thread.join();
TORRENT_ASSERT(m_torrents.empty());
TORRENT_ASSERT(m_connections.empty());
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#if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
(*m_logger) << time_now_string() << " shutdown complete!\n";
#endif
}
void session_impl::set_max_uploads(int limit)
{
TORRENT_ASSERT(limit > 0 || limit == -1);
mutex_t::scoped_lock l(m_mutex);
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INVARIANT_CHECK;
if (limit <= 0) limit = (std::numeric_limits<int>::max)();
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if (m_max_uploads == limit) return;
m_max_uploads = limit;
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m_allowed_upload_slots = limit;
}
void session_impl::set_max_connections(int limit)
{
TORRENT_ASSERT(limit > 0 || limit == -1);
mutex_t::scoped_lock l(m_mutex);
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INVARIANT_CHECK;
if (limit <= 0) limit = (std::numeric_limits<int>::max)();
m_max_connections = limit;
}
void session_impl::set_max_half_open_connections(int limit)
{
TORRENT_ASSERT(limit > 0 || limit == -1);
mutex_t::scoped_lock l(m_mutex);
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INVARIANT_CHECK;
if (limit <= 0) limit = (std::numeric_limits<int>::max)();
m_half_open.limit(limit);
}
void session_impl::set_download_rate_limit(int bytes_per_second)
{
TORRENT_ASSERT(bytes_per_second > 0 || bytes_per_second == -1);
mutex_t::scoped_lock l(m_mutex);
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INVARIANT_CHECK;
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if (bytes_per_second <= 0) bytes_per_second = bandwidth_limit::inf;
m_bandwidth_manager[peer_connection::download_channel]->throttle(bytes_per_second);
}
void session_impl::set_upload_rate_limit(int bytes_per_second)
{
TORRENT_ASSERT(bytes_per_second > 0 || bytes_per_second == -1);
mutex_t::scoped_lock l(m_mutex);
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INVARIANT_CHECK;
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if (bytes_per_second <= 0) bytes_per_second = bandwidth_limit::inf;
m_bandwidth_manager[peer_connection::upload_channel]->throttle(bytes_per_second);
}
std::auto_ptr<alert> session_impl::pop_alert()
{
mutex_t::scoped_lock l(m_mutex);
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// too expensive
// INVARIANT_CHECK;
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if (m_alerts.pending())
return m_alerts.get();
return std::auto_ptr<alert>(0);
}
alert const* session_impl::wait_for_alert(time_duration max_wait)
{
return m_alerts.wait_for_alert(max_wait);
}
void session_impl::set_severity_level(alert::severity_t s)
{
mutex_t::scoped_lock l(m_mutex);
m_alerts.set_severity(s);
}
int session_impl::upload_rate_limit() const
{
mutex_t::scoped_lock l(m_mutex);
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INVARIANT_CHECK;
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int ret = m_bandwidth_manager[peer_connection::upload_channel]->throttle();
return ret == (std::numeric_limits<int>::max)() ? -1 : ret;
}
int session_impl::download_rate_limit() const
{
mutex_t::scoped_lock l(m_mutex);
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int ret = m_bandwidth_manager[peer_connection::download_channel]->throttle();
return ret == (std::numeric_limits<int>::max)() ? -1 : ret;
}
void session_impl::start_lsd()
{
mutex_t::scoped_lock l(m_mutex);
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INVARIANT_CHECK;
if (m_lsd) return;
m_lsd = new lsd(m_io_service
, m_listen_interface.address()
, bind(&session_impl::on_lsd_peer, this, _1, _2));
}
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natpmp* session_impl::start_natpmp()
{
mutex_t::scoped_lock l(m_mutex);
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INVARIANT_CHECK;
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if (m_natpmp) return m_natpmp.get();
m_natpmp = new natpmp(m_io_service
, m_listen_interface.address()
, bind(&session_impl::on_port_mapping
, this, _1, _2, _3, 0));
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if (m_listen_interface.port() > 0)
{
m_tcp_mapping[0] = m_natpmp->add_mapping(natpmp::tcp
, m_listen_interface.port(), m_listen_interface.port());
}
#ifndef TORRENT_DISABLE_DHT
if (m_dht)
m_udp_mapping[0] = m_natpmp->add_mapping(natpmp::udp
, m_dht_settings.service_port
, m_dht_settings.service_port);
#endif
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return m_natpmp.get();
}
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upnp* session_impl::start_upnp()
{
mutex_t::scoped_lock l(m_mutex);
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INVARIANT_CHECK;
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if (m_upnp) return m_upnp.get();
m_upnp = new upnp(m_io_service, m_half_open
, m_listen_interface.address()
, m_settings.user_agent
, bind(&session_impl::on_port_mapping
, this, _1, _2, _3, 1)
, m_settings.upnp_ignore_nonrouters);
m_upnp->discover_device();
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if (m_listen_interface.port() > 0)
{
m_tcp_mapping[1] = m_upnp->add_mapping(upnp::tcp
, m_listen_interface.port(), m_listen_interface.port());
}
#ifndef TORRENT_DISABLE_DHT
if (m_dht)
m_udp_mapping[1] = m_upnp->add_mapping(upnp::udp
, m_dht_settings.service_port
, m_dht_settings.service_port);
#endif
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return m_upnp.get();
}
void session_impl::stop_lsd()
{
mutex_t::scoped_lock l(m_mutex);
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if (m_lsd.get())
m_lsd->close();
m_lsd = 0;
}
void session_impl::stop_natpmp()
{
mutex_t::scoped_lock l(m_mutex);
if (m_natpmp.get())
m_natpmp->close();
m_natpmp = 0;
}
void session_impl::stop_upnp()
{
mutex_t::scoped_lock l(m_mutex);
if (m_upnp.get())
{
m_upnp->close();
m_udp_mapping[1] = -1;
m_tcp_mapping[1] = -1;
}
m_upnp = 0;
}
void session_impl::set_external_address(address const& ip)
{
TORRENT_ASSERT(ip != address());
if (m_external_address == ip) return;
m_external_address = ip;
if (m_alerts.should_post(alert::info))
{
std::stringstream msg;
msg << "external address is '";
print_address(msg, ip) << "'";
m_alerts.post_alert(external_ip_alert(ip, msg.str()));
}
}
void session_impl::free_disk_buffer(char* buf)
{
m_disk_thread.free_buffer(buf);
}
char* session_impl::allocate_disk_buffer()
{
return m_disk_thread.allocate_buffer();
}
std::pair<char*, int> session_impl::allocate_buffer(int size)
{
TORRENT_ASSERT(size > 0);
int num_buffers = (size + send_buffer_size - 1) / send_buffer_size;
TORRENT_ASSERT(num_buffers > 0);
boost::mutex::scoped_lock l(m_send_buffer_mutex);
#ifdef TORRENT_STATS
TORRENT_ASSERT(m_buffer_allocations >= 0);
m_buffer_allocations += num_buffers;
m_buffer_usage_logger << log_time() << " protocol_buffer: "
<< (m_buffer_allocations * send_buffer_size) << std::endl;
#endif
#ifdef TORRENT_DISABLE_POOL_ALLOCATOR
int num_bytes = num_buffers * send_buffer_size;
return std::make_pair((char*)malloc(num_bytes), num_bytes);
#else
return std::make_pair((char*)m_send_buffers.ordered_malloc(num_buffers)
, num_buffers * send_buffer_size);
#endif
}
void session_impl::free_buffer(char* buf, int size)
{
TORRENT_ASSERT(size > 0);
TORRENT_ASSERT(size % send_buffer_size == 0);
int num_buffers = size / send_buffer_size;
TORRENT_ASSERT(num_buffers > 0);
boost::mutex::scoped_lock l(m_send_buffer_mutex);
#ifdef TORRENT_STATS
m_buffer_allocations -= num_buffers;
TORRENT_ASSERT(m_buffer_allocations >= 0);
m_buffer_usage_logger << log_time() << " protocol_buffer: "
<< (m_buffer_allocations * send_buffer_size) << std::endl;
#endif
#ifdef TORRENT_DISABLE_POOL_ALLOCATOR
free(buf);
#else
m_send_buffers.ordered_free(buf, num_buffers);
#endif
}
#ifndef NDEBUG
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void session_impl::check_invariant() const
{
TORRENT_ASSERT(m_max_connections > 0);
TORRENT_ASSERT(m_max_uploads > 0);
TORRENT_ASSERT(m_allowed_upload_slots >= m_max_uploads);
int unchokes = 0;
int num_optimistic = 0;
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for (connection_map::const_iterator i = m_connections.begin();
i != m_connections.end(); ++i)
{
TORRENT_ASSERT(*i);
boost::shared_ptr<torrent> t = (*i)->associated_torrent().lock();
peer_connection* p = i->get();
TORRENT_ASSERT(!p->is_disconnecting());
if (!p->is_choked()) ++unchokes;
if (p->peer_info_struct()
&& p->peer_info_struct()->optimistically_unchoked)
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{
++num_optimistic;
TORRENT_ASSERT(!p->is_choked());
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}
if (t && p->peer_info_struct())
{
TORRENT_ASSERT(t->get_policy().has_connection(p));
}
}
TORRENT_ASSERT(num_optimistic == 0 || num_optimistic == 1);
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if (m_num_unchoked != unchokes)
{
TORRENT_ASSERT(false);
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}
for (std::map<sha1_hash, boost::shared_ptr<torrent> >::const_iterator j
= m_torrents.begin(); j != m_torrents.end(); ++j)
{
TORRENT_ASSERT(boost::get_pointer(j->second));
}
}
#endif
}}