/* Copyright (c) 2016, 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/session.hpp" #include "libtorrent/settings_pack.hpp" #include "libtorrent/deadline_timer.hpp" #include "libtorrent/torrent_info.hpp" #include "libtorrent/alert_types.hpp" #include "libtorrent/aux_/path.hpp" #include "simulator/http_server.hpp" #include "simulator/http_proxy.hpp" #include "settings.hpp" #include "libtorrent/create_torrent.hpp" #include "simulator/simulator.hpp" #include "setup_swarm.hpp" #include "utils.hpp" #include "make_proxy_settings.hpp" #include "simulator/utils.hpp" #include #include using namespace sim; using namespace lt; int const piece_size = 0x4000; add_torrent_params create_torrent(file_storage& fs, bool const pad_files = false) { lt::create_torrent t(fs, piece_size , pad_files ? piece_size : -1 , pad_files ? create_torrent::optimize_alignment : create_flags_t{}); std::vector piece; piece.reserve(fs.piece_length()); piece_index_t const num = fs.end_piece(); for (piece_index_t i(0); i < num; ++i) { int k = 0; std::vector files = fs.map_block(i, 0, fs.piece_size(i)); for (auto& f : files) { if (fs.pad_file_at(f.file_index)) { for (int j = 0; j < f.size; ++j, ++k) piece.push_back('\0'); } else { for (int j = 0; j < f.size; ++j, ++k) piece.push_back((k % 26) + 'A'); } } t.set_hash(i, hasher(piece).final()); piece.clear(); } std::vector tmp; std::back_insert_iterator> out(tmp); entry tor = t.generate(); bencode(out, tor); add_torrent_params ret; ret.ti = std::make_shared(tmp, from_span); ret.flags &= ~lt::torrent_flags::auto_managed; ret.flags &= ~lt::torrent_flags::paused; ret.save_path = "."; return ret; } // this is the general template for these tests. create the session with custom // settings (Settings), set up the test, by adding torrents with certain // arguments (Setup), run the test and verify the end state (Test) template void run_test(Setup const& setup , HandleAlerts const& on_alert , Test const& test , lt::seconds const timeout = lt::seconds{100}) { // setup the simulation sim::default_config network_cfg; sim::simulation sim{network_cfg}; std::unique_ptr ios = make_io_service(sim, 0); lt::session_proxy zombie; lt::settings_pack pack = settings(); // create session std::shared_ptr ses = std::make_shared(pack, *ios); // set up test, like adding torrents (customization point) setup(*ses); // only monitor alerts for session 0 (the downloader) print_alerts(*ses, [=](lt::session& ses, lt::alert const* a) { on_alert(ses, a); }); // set up a timer to fire later, to verify everything we expected to happen // happened sim::timer t(sim, timeout, [&](boost::system::error_code const& ec) { std::printf("shutting down\n"); // shut down zombie = ses->abort(); ses.reset(); }); test(sim, *ses); } TORRENT_TEST(single_file) { using namespace lt; file_storage fs; fs.add_file("abc'abc", 0x8000); // this filename will have to be escaped lt::add_torrent_params params = ::create_torrent(fs); params.url_seeds.push_back("http://2.2.2.2:8080/"); bool expected = false; run_test( [¶ms](lt::session& ses) { ses.async_add_torrent(params); }, [](lt::session& ses, lt::alert const* alert) {}, [&expected](sim::simulation& sim, lt::session& ses) { sim::asio::io_service web_server(sim, address_v4::from_string("2.2.2.2")); // listen on port 8080 sim::http_server http(web_server, 8080); // make sure the requested file is correctly escaped http.register_handler("/abc%27abc" , [&expected](std::string method, std::string req , std::map&) { expected = true; return sim::send_response(404, "Not Found", 0); }); sim.run(); } ); TEST_CHECK(expected); } TORRENT_TEST(multi_file) { using namespace lt; file_storage fs; fs.add_file(combine_path("foo", "abc'abc"), 0x8000); // this filename will have to be escaped fs.add_file(combine_path("foo", "bar"), 0x3000); lt::add_torrent_params params = ::create_torrent(fs); params.url_seeds.push_back("http://2.2.2.2:8080/"); std::array expected{{ false, false }}; run_test( [¶ms](lt::session& ses) { ses.async_add_torrent(params); }, [](lt::session& ses, lt::alert const* alert) {}, [&expected](sim::simulation& sim, lt::session& ses) { sim::asio::io_service web_server(sim, address_v4::from_string("2.2.2.2")); // listen on port 8080 sim::http_server http(web_server, 8080); // make sure the requested file is correctly escaped http.register_handler("/foo/abc%27abc" , [&expected](std::string, std::string, std::map&) { expected[0] = true; return sim::send_response(404, "not found", 0); }); http.register_handler("/foo/bar" , [&expected](std::string, std::string, std::map&) { expected[1] = true; return sim::send_response(404, "not found", 0); }); sim.run(); } ); TEST_CHECK(expected[0]); TEST_CHECK(expected[1]); } std::string generate_content(lt::file_storage const& fs, file_index_t file , std::int64_t offset, std::int64_t len) { std::string ret; ret.reserve(lt::aux::numeric_cast(len)); std::int64_t const file_offset = fs.file_offset(file); int const piece_size = fs.piece_length(); for (std::int64_t i = offset + file_offset; i < offset + file_offset + len; ++i) ret.push_back(((i % piece_size) % 26) + 'A'); return ret; } void serve_content_for(sim::http_server& http, std::string const& path , lt::file_storage const& fs, file_index_t const file) { http.register_content(path, fs.file_size(file_index_t(file)) , [&fs,file](std::int64_t offset, std::int64_t len) { return generate_content(fs, file, offset, len); }); } // test redirecting *unaligned* files to the same server still working. i.e. the // second redirect is added to the same web-seed entry as the first one TORRENT_TEST(unaligned_file_redirect) { using namespace lt; file_storage fs; fs.add_file(combine_path("foo", "1"), 0xc030); fs.add_file(combine_path("foo", "2"), 0xc030); lt::add_torrent_params params = ::create_torrent(fs); params.url_seeds.push_back("http://2.2.2.2:8080/"); bool seeding = false; run_test( [¶ms](lt::session& ses) { ses.async_add_torrent(params); }, [&](lt::session& ses, lt::alert const* alert) { if (lt::alert_cast(alert)) seeding = true; }, [&fs](sim::simulation& sim, lt::session& ses) { // http1 is the root web server that will just redirect requests to // other servers sim::asio::io_service web_server1(sim, address_v4::from_string("2.2.2.2")); sim::http_server http1(web_server1, 8080); // redirect file 1 and file 2 to the same servers http1.register_redirect("/foo/1", "http://3.3.3.3:4444/bla/file1"); http1.register_redirect("/foo/2", "http://3.3.3.3:4444/bar/file2"); // server for serving the content sim::asio::io_service web_server2(sim, address_v4::from_string("3.3.3.3")); sim::http_server http2(web_server2, 4444); serve_content_for(http2, "/bla/file1", fs, file_index_t(0)); serve_content_for(http2, "/bar/file2", fs, file_index_t(1)); sim.run(); } ); TEST_EQUAL(seeding, true); } // test redirecting *unaligned* but padded files to separate servers TORRENT_TEST(multi_file_redirect_pad_files) { using namespace lt; file_storage fs_; fs_.add_file(combine_path("foo", "1"), 0xc030); fs_.add_file(combine_path("foo", "2"), 0xc030); // true means use padfiles lt::add_torrent_params params = ::create_torrent(fs_, true); params.url_seeds.push_back("http://2.2.2.2:8080/"); // since the final torrent is different than what we built (because of pad // files), ask about it. file_storage const& fs = params.ti->files(); bool seeding = false; run_test( [¶ms](lt::session& ses) { ses.async_add_torrent(params); }, [&](lt::session& ses, lt::alert const* alert) { if (lt::alert_cast(alert)) seeding = true; }, [&fs](sim::simulation& sim, lt::session& ses) { // http1 is the root web server that will just redirect requests to // other servers sim::asio::io_service web_server1(sim, address_v4::from_string("2.2.2.2")); sim::http_server http1(web_server1, 8080); // redirect file 1 and file 2 to different servers http1.register_redirect("/foo/1", "http://3.3.3.3:4444/bla/file1"); http1.register_redirect("/foo/2", "http://4.4.4.4:9999/bar/file2"); // server for file 1 sim::asio::io_service web_server2(sim, address_v4::from_string("3.3.3.3")); sim::http_server http2(web_server2, 4444); serve_content_for(http2, "/bla/file1", fs, file_index_t(0)); // server for file 2 sim::asio::io_service web_server3(sim, address_v4::from_string("4.4.4.4")); sim::http_server http3(web_server3, 9999); serve_content_for(http3, "/bar/file2", fs, file_index_t(2)); sim.run(); } ); TEST_EQUAL(seeding, true); } // test that a web seed can redirect files to separate web servers (as long as // they are piece aligned) TORRENT_TEST(multi_file_redirect) { using namespace lt; file_storage fs; fs.add_file(combine_path("foo", "1"), 0xc000); fs.add_file(combine_path("foo", "2"), 0xc030); lt::add_torrent_params params = ::create_torrent(fs); params.url_seeds.push_back("http://2.2.2.2:8080/"); bool seeding = false; run_test( [¶ms](lt::session& ses) { ses.async_add_torrent(params); }, [&](lt::session& ses, lt::alert const* alert) { if (lt::alert_cast(alert)) seeding = true; }, [&fs](sim::simulation& sim, lt::session& ses) { // http1 is the root web server that will just redirect requests to // other servers sim::asio::io_service web_server1(sim, address_v4::from_string("2.2.2.2")); sim::http_server http1(web_server1, 8080); // redirect file 1 and file 2 to different servers http1.register_redirect("/foo/1", "http://3.3.3.3:4444/bla/file1"); http1.register_redirect("/foo/2", "http://4.4.4.4:9999/bar/file2"); // server for file 1 sim::asio::io_service web_server2(sim, address_v4::from_string("3.3.3.3")); sim::http_server http2(web_server2, 4444); serve_content_for(http2, "/bla/file1", fs, file_index_t(0)); // server for file 2 sim::asio::io_service web_server3(sim, address_v4::from_string("4.4.4.4")); sim::http_server http3(web_server3, 9999); serve_content_for(http3, "/bar/file2", fs, file_index_t(1)); sim.run(); } ); TEST_EQUAL(seeding, true); } // test web_seed redirect through proxy TORRENT_TEST(multi_file_redirect_through_proxy) { using namespace lt; file_storage fs; fs.add_file(combine_path("foo", "1"), 0xc000); fs.add_file(combine_path("foo", "2"), 0xc030); lt::add_torrent_params params = ::create_torrent(fs); params.url_seeds.push_back("http://2.2.2.2:8080/"); bool seeding = false; run_test( [¶ms](lt::session& ses) { settings_pack pack; pack.set_int(settings_pack::proxy_type, settings_pack::http); pack.set_str(settings_pack::proxy_hostname, "50.50.50.50"); pack.set_str(settings_pack::proxy_username, "testuser"); pack.set_str(settings_pack::proxy_password, "testpass"); pack.set_int(settings_pack::proxy_port, 4445); pack.set_bool(settings_pack::proxy_hostnames, true); ses.apply_settings(pack); ses.async_add_torrent(params); }, [&](lt::session& ses, lt::alert const* alert) { if (lt::alert_cast(alert)) { seeding = true; } }, [&fs](sim::simulation& sim, lt::session& ses) { sim::asio::io_service proxy_ios(sim, address_v4::from_string("50.50.50.50")); sim::http_proxy http_p(proxy_ios, 4445); // http1 is the root web server that will just redirect requests to // other servers sim::asio::io_service web_server1(sim, address_v4::from_string("2.2.2.2")); sim::http_server http1(web_server1, 8080); // redirect file 1 and file 2 to different servers http1.register_redirect("/foo/1", "http://3.3.3.3:4444/bla/file1"); http1.register_redirect("/foo/2", "http://4.4.4.4:9999/bar/file2"); // server for file 1 sim::asio::io_service web_server2(sim, address_v4::from_string("3.3.3.3")); sim::http_server http2(web_server2, 4444); serve_content_for(http2, "/bla/file1", fs, file_index_t(0)); // server for file 2 sim::asio::io_service web_server3(sim, address_v4::from_string("4.4.4.4")); sim::http_server http3(web_server3, 9999); serve_content_for(http3, "/bar/file2", fs, file_index_t(1)); sim.run(); } ); TEST_EQUAL(seeding, true); } // this is expected to fail, since the files are not aligned and redirected to // separate servers, without pad files TORRENT_TEST(multi_file_unaligned_redirect) { using namespace lt; file_storage fs; fs.add_file(combine_path("foo", "1"), 0xc030); fs.add_file(combine_path("foo", "2"), 0xc030); lt::add_torrent_params params = ::create_torrent(fs); params.url_seeds.push_back("http://2.2.2.2:8080/"); run_test( [¶ms](lt::session& ses) { ses.async_add_torrent(params); }, [&](lt::session& ses, lt::alert const* alert) { // We don't expect to get this aslert TEST_CHECK(lt::alert_cast(alert) == nullptr); }, [&fs](sim::simulation& sim, lt::session& ses) { // http1 is the root web server that will just redirect requests to // other servers sim::asio::io_service web_server1(sim, address_v4::from_string("2.2.2.2")); sim::http_server http1(web_server1, 8080); // redirect file 1 and file 2 to different servers http1.register_redirect("/foo/1", "http://3.3.3.3:4444/bla/file1"); http1.register_redirect("/foo/2", "http://4.4.4.4:9999/bar/file2"); // server for file 1 sim::asio::io_service web_server2(sim, address_v4::from_string("3.3.3.3")); sim::http_server http2(web_server2, 4444); serve_content_for(http2, "/bla/file1", fs, file_index_t(0)); // server for file 2 sim::asio::io_service web_server3(sim, address_v4::from_string("4.4.4.4")); sim::http_server http3(web_server3, 9999); serve_content_for(http3, "/bar/file2", fs, file_index_t(1)); sim.run(); } ); } TORRENT_TEST(urlseed_timeout) { bool timeout = false; run_test( [](lt::session& ses) { file_storage fs; fs.add_file("timeout_test", 0x8000); lt::add_torrent_params params = ::create_torrent(fs); params.url_seeds.push_back("http://2.2.2.2:8080/"); params.flags &= ~lt::torrent_flags::auto_managed; params.flags &= ~lt::torrent_flags::paused; params.save_path = "."; ses.async_add_torrent(params); }, [&timeout](lt::session& ses, lt::alert const* alert) { const lt::peer_disconnected_alert *pda = lt::alert_cast(alert); if (pda && pda->error == errors::timed_out_inactivity){ timeout = true; } }, [](sim::simulation& sim, lt::session& ses) { sim::asio::io_service web_server(sim, address_v4::from_string("2.2.2.2")); // listen on port 8080 sim::http_server http(web_server, 8080); http.register_stall_handler("/timeout_test"); sim.run(); } ); TEST_EQUAL(timeout, true); } // check for correct handle of unexpected http status response. // with disabled "close_redundant_connections" alive web server connection // may be closed in such manner. TORRENT_TEST(no_close_redudant_webseed) { using namespace lt; file_storage fs; fs.add_file("file1", 1); lt::add_torrent_params params = ::create_torrent(fs); params.url_seeds.push_back("http://2.2.2.2:8080/"); bool expected = false; run_test( [¶ms](lt::session& ses) { lt::settings_pack pack; pack.set_bool(settings_pack::close_redundant_connections, false); ses.apply_settings(pack); ses.async_add_torrent(params); }, [](lt::session& ses, lt::alert const* alert) {}, [&expected](sim::simulation& sim, lt::session& ses) { sim::asio::io_service web_server(sim, address_v4::from_string("2.2.2.2")); // listen on port 8080 sim::http_server http(web_server, 8080); http.register_handler("/file1" , [&expected](std::string method, std::string req , std::map&) { expected = true; char const* extra_headers[4] = { "Content-Range: bytes 0-0/1\r\n", "", "", ""}; return sim::send_response(206, "Partial Content", 1, extra_headers). append("A"). append(sim::send_response(408, "REQUEST TIMEOUT", 0)); }); sim.run(); } ); TEST_CHECK(expected); } // make sure the max_web_seed_connections limit is honored TORRENT_TEST(web_seed_connection_limit) { using namespace lt; file_storage fs; fs.add_file("file1", 1); lt::add_torrent_params params = ::create_torrent(fs); params.url_seeds.push_back("http://2.2.2.1:8080/"); params.url_seeds.push_back("http://2.2.2.2:8080/"); params.url_seeds.push_back("http://2.2.2.3:8080/"); params.url_seeds.push_back("http://2.2.2.4:8080/"); std::array expected = {}; run_test( [¶ms](lt::session& ses) { lt::settings_pack pack; pack.set_int(settings_pack::max_web_seed_connections, 2); ses.apply_settings(pack); ses.async_add_torrent(params); }, [](lt::session& ses, lt::alert const* alert) {}, [&expected](sim::simulation& sim, lt::session& ses) { using ios = sim::asio::io_service; ios web_server1{sim, address_v4::from_string("2.2.2.1")}; ios web_server2{sim, address_v4::from_string("2.2.2.2")}; ios web_server3{sim, address_v4::from_string("2.2.2.3")}; ios web_server4{sim, address_v4::from_string("2.2.2.4")}; // listen on port 8080 using ws = sim::http_server; ws http1{web_server1, 8080}; ws http2{web_server2, 8080}; ws http3{web_server3, 8080}; ws http4{web_server4, 8080}; auto const handler = [&expected](std::string method, std::string req , std::map&, int idx) { ++expected[idx]; // deliberately avoid sending the content, to cause a hang return sim::send_response(206, "Partial Content", 1); }; using namespace std::placeholders; http1.register_handler("/file1", std::bind(handler, _1, _2, _3, 0)); http2.register_handler("/file1", std::bind(handler, _1, _2, _3, 1)); http3.register_handler("/file1", std::bind(handler, _1, _2, _3, 2)); http4.register_handler("/file1", std::bind(handler, _1, _2, _3, 3)); sim.run(); }, lt::seconds(15) ); // make sure we only connected to 2 of the web seeds, since that's the limit TEST_CHECK(std::accumulate(expected.begin(), expected.end(), 0) == 2); }