2015-08-08 03:28:51 +02:00
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/*
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Copyright (c) 2008, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "libtorrent/session.hpp"
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#include "libtorrent/settings_pack.hpp"
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#include "libtorrent/alert_types.hpp"
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#include "libtorrent/time.hpp" // for clock_type
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#include <boost/bind.hpp>
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#include "test.hpp"
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#include "setup_swarm.hpp"
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#include "setup_transfer.hpp" // for create_torrent (factor this out!)
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#include "settings.hpp"
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#include <fstream>
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#include <iostream>
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using namespace libtorrent;
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namespace lt = libtorrent;
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// TODO: a lot of this class is boiler plate. Factor out into a reusable unit
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struct swarm_config : swarm_setup_provider
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{
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swarm_config(int num_peers)
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: m_swarm_id(std::rand())
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, m_start_time(lt::clock_type::now())
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{
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// in case the previous run did not exit gracefully
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clear_download_directories(num_peers);
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error_code ec;
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char save_path[200];
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snprintf(save_path, sizeof(save_path), "swarm-%04d-peer-%02d"
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, m_swarm_id, 0);
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create_directory(save_path, ec);
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std::ofstream file(combine_path(save_path, "temporary").c_str());
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m_ti = ::create_torrent(&file, 0x4000, 90, false);
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file.close();
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}
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virtual void on_exit(std::vector<torrent_handle> const& torrents)
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{
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TEST_CHECK(torrents.size() > 0);
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for (int i = 0; i < int(torrents.size()); ++i)
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{
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torrent_status st = torrents[i].status();
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TEST_CHECK(st.is_seeding);
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TEST_CHECK(st.total_upload > 0 || st.total_download > 0);
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}
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// if this check fails, there is a performance regression in the protocol,
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// either uTP or bittorrent itself. Be careful with the download request
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// queue size (and make sure it can grow fast enough, to keep up with
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// slow-start) and the send buffer watermark
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TEST_CHECK(lt::clock_type::now() < m_start_time + lt::milliseconds(8500));
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// clean up the download directories to make the next run start from
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// scratch.
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clear_download_directories(int(torrents.size()));
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}
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void clear_download_directories(int num_peers)
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{
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for (int i = 0; i < num_peers; ++i)
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{
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error_code ec;
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char save_path[200];
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snprintf(save_path, sizeof(save_path), "swarm-%04d-peer-%02d"
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, m_swarm_id, i);
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// in case the previous run did not exit gracefully
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remove_all(save_path, ec);
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}
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}
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// called for every alert. if the simulation is done, return true
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virtual bool on_alert(libtorrent::alert const* alert
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, int session_idx
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2015-08-10 15:17:41 +02:00
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, std::vector<libtorrent::torrent_handle> const& torrents
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, libtorrent::session& ses) override
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2015-08-08 03:28:51 +02:00
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{
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if (torrents.empty()) return false;
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bool all_are_seeding = true;
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for (int i = 0; i < int(torrents.size()); ++i)
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{
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if (torrents[i].status().is_seeding)
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continue;
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all_are_seeding = false;
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break;
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}
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// if all torrents are seeds, terminate the simulation, we're done
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return all_are_seeding;
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}
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// called for every torrent that's added (and every session that's started).
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// this is useful to give every session a unique save path and to make some
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// sessions seeds and others downloaders
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2015-08-10 15:17:41 +02:00
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virtual libtorrent::add_torrent_params add_torrent(int idx) override
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2015-08-08 03:28:51 +02:00
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{
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add_torrent_params p;
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p.flags &= ~add_torrent_params::flag_paused;
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p.flags &= ~add_torrent_params::flag_auto_managed;
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if (idx == 0)
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{
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// skip checking up front, and get started with the transfer sooner
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p.flags |= add_torrent_params::flag_seed_mode;
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}
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p.ti = m_ti;
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char save_path[200];
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snprintf(save_path, sizeof(save_path), "swarm-%04d-peer-%02d"
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, m_swarm_id, idx);
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p.save_path = save_path;
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return p;
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}
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// called for every session that's added
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2015-08-10 15:17:41 +02:00
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virtual libtorrent::settings_pack add_session(int idx) override
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2015-08-08 03:28:51 +02:00
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{
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settings_pack pack = settings();
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// force uTP connection
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pack.set_bool(settings_pack::enable_incoming_utp, true);
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pack.set_bool(settings_pack::enable_outgoing_utp, true);
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pack.set_bool(settings_pack::enable_incoming_tcp, false);
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pack.set_bool(settings_pack::enable_outgoing_tcp, false);
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// the encryption handshake adds several round-trips to the bittorrent
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// handshake, and slows it down significantly
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pack.set_int(settings_pack::out_enc_policy, settings_pack::pe_disabled);
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pack.set_int(settings_pack::in_enc_policy, settings_pack::pe_disabled);
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// make sure the sessions have different peer ids
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lt::peer_id pid;
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std::generate(&pid[0], &pid[0] + 20, &random_byte);
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pack.set_str(lt::settings_pack::peer_fingerprint, pid.to_string());
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return pack;
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}
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private:
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int m_swarm_id;
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lt::time_point m_start_time;
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boost::shared_ptr<libtorrent::torrent_info> m_ti;
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};
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TORRENT_TEST(utp)
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{
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// TODO: 3 simulate packet loss
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// TODO: 3 simulate unpredictible latencies
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// TODO: 3 simulate proper (taildrop) queues (perhaps even RED and BLUE)
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swarm_config cfg(2);
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setup_swarm(2, cfg);
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}
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