/* Copyright (c) 2013, 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/peer_list.hpp" #include "libtorrent/torrent_handle.hpp" #include "libtorrent/torrent_peer_allocator.hpp" #include "libtorrent/peer_connection_interface.hpp" #include "libtorrent/stat.hpp" #include "libtorrent/ip_voter.hpp" #include "libtorrent/ip_filter.hpp" #include "libtorrent/peer_info.hpp" #include "libtorrent/random.hpp" #include "libtorrent/socket_io.hpp" #include "test.hpp" #include "setup_transfer.hpp" #include #include // for shared_ptr #include using namespace libtorrent; struct mock_torrent; struct mock_peer_connection : peer_connection_interface , std::enable_shared_from_this { mock_peer_connection(mock_torrent* tor, bool out, tcp::endpoint const& remote) : m_choked(false) , m_outgoing(out) , m_tp(nullptr) , m_remote(remote) , m_local(ep("127.0.0.1", 8080)) , m_disconnect_called(false) , m_torrent(*tor) { for (int i = 0; i < 20; ++i) m_id[i] = rand(); } virtual ~mock_peer_connection() = default; #if !defined TORRENT_DISABLE_LOGGING bool should_log(peer_log_alert::direction_t) const override { return true; } void peer_log(peer_log_alert::direction_t dir, char const* event , char const* fmt, ...) const override { va_list v; va_start(v, fmt); vprintf(fmt, v); va_end(v); } #endif bool was_disconnected() const { return m_disconnect_called; } void set_local_ep(tcp::endpoint const& ep) { m_local = ep; } libtorrent::stat m_stat; bool m_choked; bool m_outgoing; torrent_peer* m_tp; tcp::endpoint m_remote; tcp::endpoint m_local; peer_id m_id; bool m_disconnect_called; mock_torrent& m_torrent; void get_peer_info(peer_info& p) const override {} tcp::endpoint const& remote() const override { return m_remote; } tcp::endpoint local_endpoint() const override { return m_local; } void disconnect(error_code const& ec , operation_t op, int error = 0) override; peer_id const& pid() const override { return m_id; } void set_holepunch_mode() override {} torrent_peer* peer_info_struct() const override { return m_tp; } void set_peer_info(torrent_peer* pi) override { m_tp = pi; } bool is_outgoing() const override { return m_outgoing; } void add_stat(std::int64_t downloaded, std::int64_t uploaded) override { m_stat.add_stat(downloaded, uploaded); } bool fast_reconnect() const override { return true; } bool is_choked() const override { return m_choked; } bool failed() const override { return false; } libtorrent::stat const& statistics() const override { return m_stat; } }; struct mock_torrent { explicit mock_torrent(torrent_state* st) : m_p(nullptr), m_state(st) {} virtual ~mock_torrent() = default; bool connect_to_peer(torrent_peer* peerinfo, bool ignore_limit = false) { TORRENT_ASSERT(peerinfo->connection == nullptr); if (peerinfo->connection) return false; auto c = std::make_shared(this, true, peerinfo->ip()); c->set_peer_info(peerinfo); m_connections.push_back(c); m_p->set_connection(peerinfo, c.get()); return true; } #ifndef TORRENT_DISABLE_LOGGING void debug_log(const char* fmt, ...) const { va_list v; va_start(v, fmt); vprintf(fmt, v); va_end(v); } #endif peer_list* m_p; torrent_state* m_state; std::vector > m_connections; }; void mock_peer_connection::disconnect(error_code const& ec , operation_t op, int error) { m_torrent.m_p->connection_closed(*this, 0, m_torrent.m_state); std::vector >::iterator i = std::find(m_torrent.m_connections.begin(), m_torrent.m_connections.end() , std::static_pointer_cast(shared_from_this())); if (i != m_torrent.m_connections.end()) m_torrent.m_connections.erase(i); m_tp = nullptr; m_disconnect_called = true; } bool has_peer(peer_list const& p, tcp::endpoint const& ep) { std::pair its = p.find_peers(ep.address()); return its.first != its.second; } torrent_state init_state(torrent_peer_allocator& allocator , external_ip& ext_ip) { torrent_state st; st.is_finished = false; st.is_paused = false; st.max_peerlist_size = 1000; st.allow_multiple_connections_per_ip = false; st.peer_allocator = &allocator; st.ip = &ext_ip; st.port = 9999; return st; } torrent_peer* add_peer(peer_list& p, torrent_state& st, tcp::endpoint const& ep) { int cc = p.num_connect_candidates(); torrent_peer* peer = p.add_peer(ep, 0, 0, &st); if (peer) { TEST_EQUAL(p.num_connect_candidates(), cc + 1); TEST_EQUAL(peer->port, ep.port()); } st.erased.clear(); return peer; } void connect_peer(peer_list& p, mock_torrent& t, torrent_state& st) { torrent_peer* tp = p.connect_one_peer(0, &st); TEST_CHECK(tp); if (!tp) return; t.connect_to_peer(tp); st.erased.clear(); TEST_CHECK(tp->connection); } static torrent_peer_allocator allocator; static external_ip ext_ip; // test multiple peers with the same IP // when disallowing it TORRENT_TEST(multiple_ips_disallowed) { torrent_state st = init_state(allocator, ext_ip); mock_torrent t(&st); peer_list p; t.m_p = &p; TEST_EQUAL(p.num_connect_candidates(), 0); torrent_peer* peer1 = p.add_peer(ep("10.0.0.2", 3000), 0, 0, &st); TEST_EQUAL(p.num_peers(), 1); TEST_EQUAL(p.num_connect_candidates(), 1); st.erased.clear(); torrent_peer* peer2 = p.add_peer(ep("10.0.0.2", 9020), 0, 0, &st); TEST_EQUAL(p.num_peers(), 1); TEST_EQUAL(peer1, peer2); TEST_EQUAL(p.num_connect_candidates(), 1); st.erased.clear(); } // test multiple peers with the same IP // when allowing it TORRENT_TEST(multiple_ips_allowed) { torrent_state st = init_state(allocator, ext_ip); mock_torrent t(&st); st.allow_multiple_connections_per_ip = true; peer_list p; t.m_p = &p; torrent_peer* peer1 = p.add_peer(ep("10.0.0.2", 3000), 0, 0, &st); TEST_EQUAL(p.num_connect_candidates(), 1); TEST_EQUAL(p.num_peers(), 1); st.erased.clear(); torrent_peer* peer2 = p.add_peer(ep("10.0.0.2", 9020), 0, 0, &st); TEST_EQUAL(p.num_peers(), 2); TEST_CHECK(peer1 != peer2); TEST_EQUAL(p.num_connect_candidates(), 2); st.erased.clear(); } // test adding two peers with the same IP, but different ports, to // make sure they can be connected at the same time // with allow_multiple_connections_per_ip enabled TORRENT_TEST(multiple_ips_allowed2) { torrent_state st = init_state(allocator, ext_ip); mock_torrent t(&st); st.allow_multiple_connections_per_ip = true; peer_list p; t.m_p = &p; torrent_peer* peer1 = p.add_peer(ep("10.0.0.2", 3000), 0, 0, &st); TEST_EQUAL(p.num_connect_candidates(), 1); st.erased.clear(); TEST_EQUAL(p.num_peers(), 1); torrent_peer* tp = p.connect_one_peer(0, &st); TEST_CHECK(tp); t.connect_to_peer(tp); st.erased.clear(); // we only have one peer, we can't // connect another one tp = p.connect_one_peer(0, &st); TEST_CHECK(tp == nullptr); st.erased.clear(); torrent_peer* peer2 = p.add_peer(ep("10.0.0.2", 9020), 0, 0, &st); TEST_EQUAL(p.num_peers(), 2); TEST_CHECK(peer1 != peer2); TEST_EQUAL(p.num_connect_candidates(), 1); st.erased.clear(); tp = p.connect_one_peer(0, &st); TEST_CHECK(tp); t.connect_to_peer(tp); TEST_EQUAL(p.num_connect_candidates(), 0); st.erased.clear(); } // test adding two peers with the same IP, but different ports, to // make sure they can not be connected at the same time // with allow_multiple_connections_per_ip disabled TORRENT_TEST(multiple_ips_disallowed2) { torrent_state st = init_state(allocator, ext_ip); mock_torrent t(&st); st.allow_multiple_connections_per_ip = false; peer_list p; t.m_p = &p; torrent_peer* peer1 = p.add_peer(ep("10.0.0.2", 3000), 0, 0, &st); TEST_EQUAL(p.num_connect_candidates(), 1); TEST_EQUAL(peer1->port, 3000); st.erased.clear(); TEST_EQUAL(p.num_peers(), 1); torrent_peer* tp = p.connect_one_peer(0, &st); TEST_CHECK(tp); t.connect_to_peer(tp); st.erased.clear(); // we only have one peer, we can't // connect another one tp = p.connect_one_peer(0, &st); TEST_CHECK(tp == nullptr); st.erased.clear(); torrent_peer* peer2 = p.add_peer(ep("10.0.0.2", 9020), 0, 0, &st); TEST_EQUAL(p.num_peers(), 1); TEST_EQUAL(peer2->port, 9020); TEST_CHECK(peer1 == peer2); TEST_EQUAL(p.num_connect_candidates(), 0); st.erased.clear(); } // test incoming connection // and update_peer_port TORRENT_TEST(update_peer_port) { torrent_state st = init_state(allocator, ext_ip); mock_torrent t(&st); st.allow_multiple_connections_per_ip = false; peer_list p; t.m_p = &p; TEST_EQUAL(p.num_connect_candidates(), 0); auto c = std::make_shared(&t, true, ep("10.0.0.1", 8080)); p.new_connection(*c, 0, &st); TEST_EQUAL(p.num_connect_candidates(), 0); TEST_EQUAL(p.num_peers(), 1); st.erased.clear(); p.update_peer_port(4000, c->peer_info_struct(), peer_info::incoming, &st); TEST_EQUAL(p.num_connect_candidates(), 0); TEST_EQUAL(p.num_peers(), 1); TEST_EQUAL(c->peer_info_struct()->port, 4000); st.erased.clear(); } // test incoming connection // and update_peer_port, causing collission TORRENT_TEST(update_peer_port_collide) { torrent_state st = init_state(allocator, ext_ip); mock_torrent t(&st); st.allow_multiple_connections_per_ip = true; peer_list p; t.m_p = &p; torrent_peer* peer2 = p.add_peer(ep("10.0.0.1", 4000), 0, 0, &st); TEST_CHECK(peer2); TEST_EQUAL(p.num_connect_candidates(), 1); auto c = std::make_shared(&t, true, ep("10.0.0.1", 8080)); p.new_connection(*c, 0, &st); TEST_EQUAL(p.num_connect_candidates(), 1); // at this point we have two peers, because we think they have different // ports TEST_EQUAL(p.num_peers(), 2); st.erased.clear(); // this peer will end up having the same port as the existing peer in the list p.update_peer_port(4000, c->peer_info_struct(), peer_info::incoming, &st); TEST_EQUAL(p.num_connect_candidates(), 0); // the expected behavior is to replace that one TEST_EQUAL(p.num_peers(), 1); TEST_EQUAL(c->peer_info_struct()->port, 4000); st.erased.clear(); } std::shared_ptr shared_from_this(libtorrent::peer_connection_interface* p) { return std::static_pointer_cast( static_cast(p)->shared_from_this()); } // test ip filter TORRENT_TEST(ip_filter) { torrent_state st = init_state(allocator, ext_ip); mock_torrent t(&st); st.allow_multiple_connections_per_ip = false; peer_list p; t.m_p = &p; // add peer 1 torrent_peer* peer1 = add_peer(p, st, ep("10.0.0.2", 3000)); torrent_peer* peer2 = add_peer(p, st, ep("11.0.0.2", 9020)); TEST_CHECK(peer1 != peer2); connect_peer(p, t, st); connect_peer(p, t, st); auto con1 = shared_from_this(peer1->connection); TEST_EQUAL(con1->was_disconnected(), false); auto con2 = shared_from_this(peer2->connection); TEST_EQUAL(con2->was_disconnected(), false); // now, filter one of the IPs and make sure the peer is removed ip_filter filter; filter.add_rule(address_v4::from_string("11.0.0.0"), address_v4::from_string("255.255.255.255"), 1); std::vector
banned; p.apply_ip_filter(filter, &st, banned); // we just erased a peer, because it was filtered by the ip filter TEST_EQUAL(st.erased.size(), 1); TEST_EQUAL(p.num_connect_candidates(), 0); TEST_EQUAL(p.num_peers(), 1); TEST_EQUAL(banned.size(), 1); TEST_EQUAL(banned[0], address_v4::from_string("11.0.0.2")); TEST_EQUAL(con2->was_disconnected(), true); TEST_EQUAL(con1->was_disconnected(), false); } // test port filter TORRENT_TEST(port_filter) { torrent_state st = init_state(allocator, ext_ip); mock_torrent t(&st); st.allow_multiple_connections_per_ip = false; peer_list p; t.m_p = &p; // add peer 1 torrent_peer* peer1 = add_peer(p, st, ep("10.0.0.2", 3000)); torrent_peer* peer2 = add_peer(p, st, ep("11.0.0.2", 9020)); TEST_CHECK(peer1 != peer2); connect_peer(p, t, st); connect_peer(p, t, st); auto con1 = shared_from_this(peer1->connection); TEST_EQUAL(con1->was_disconnected(), false); auto con2 = shared_from_this(peer2->connection); TEST_EQUAL(con2->was_disconnected(), false); // now, filter one of the IPs and make sure the peer is removed port_filter filter; filter.add_rule(9000, 10000, 1); std::vector
banned; p.apply_port_filter(filter, &st, banned); // we just erased a peer, because it was filtered by the ip filter TEST_EQUAL(st.erased.size(), 1); TEST_EQUAL(p.num_connect_candidates(), 0); TEST_EQUAL(p.num_peers(), 1); TEST_EQUAL(banned.size(), 1); TEST_EQUAL(banned[0], address_v4::from_string("11.0.0.2")); TEST_EQUAL(con2->was_disconnected(), true); TEST_EQUAL(con1->was_disconnected(), false); } // test banning peers TORRENT_TEST(ban_peers) { torrent_state st = init_state(allocator, ext_ip); mock_torrent t(&st); st.allow_multiple_connections_per_ip = false; peer_list p; t.m_p = &p; torrent_peer* peer1 = add_peer(p, st, ep("10.0.0.1", 4000)); TEST_EQUAL(p.num_connect_candidates(), 1); auto c = std::make_shared(&t, true, ep("10.0.0.1", 8080)); p.new_connection(*c, 0, &st); TEST_EQUAL(p.num_connect_candidates(), 0); TEST_EQUAL(p.num_peers(), 1); st.erased.clear(); // now, ban the peer bool ok = p.ban_peer(c->peer_info_struct()); TEST_EQUAL(ok, true); TEST_EQUAL(peer1->banned, true); // we still have it in the list TEST_EQUAL(p.num_peers(), 1); // it's just not a connect candidate, nor allowed to receive incoming connections TEST_EQUAL(p.num_connect_candidates(), 0); p.connection_closed(*c, 0, &st); TEST_EQUAL(p.num_peers(), 1); TEST_EQUAL(p.num_connect_candidates(), 0); st.erased.clear(); c = std::make_shared(&t, true, ep("10.0.0.1", 8080)); ok = p.new_connection(*c, 0, &st); // since it's banned, we should not allow this incoming connection TEST_EQUAL(ok, false); TEST_EQUAL(p.num_connect_candidates(), 0); st.erased.clear(); } // test erase_peers when we fill up the peer list TORRENT_TEST(erase_peers) { torrent_state st = init_state(allocator, ext_ip); mock_torrent t(&st); st.max_peerlist_size = 100; st.allow_multiple_connections_per_ip = true; peer_list p; t.m_p = &p; for (int i = 0; i < 100; ++i) { TEST_EQUAL(st.erased.size(), 0); tcp::endpoint ep = rand_tcp_ep(); torrent_peer* peer = add_peer(p, st, ep); TEST_CHECK(peer); if (peer == nullptr || st.erased.size() > 0) { std::fprintf(stderr, "unexpected rejection of peer: %s | %d in list. " "added peer %p, erased %d peers\n" , print_endpoint(ep).c_str(), p.num_peers(), peer , int(st.erased.size())); } } TEST_EQUAL(p.num_peers(), 100); // trigger the eviction of one peer torrent_peer* peer = p.add_peer(rand_tcp_ep(), 0, 0, &st); // we either removed an existing peer, or rejected this one // either is valid behavior when the list is full TEST_CHECK(st.erased.size() == 1 || peer == nullptr); } // test set_ip_filter TORRENT_TEST(set_ip_filter) { torrent_state st = init_state(allocator, ext_ip); std::vector
banned; mock_torrent t(&st); peer_list p; t.m_p = &p; for (int i = 0; i < 100; ++i) { p.add_peer(tcp::endpoint( address_v4((10 << 24) + ((i + 10) << 16)), 353), 0, 0, &st); TEST_EQUAL(st.erased.size(), 0); st.erased.clear(); } TEST_EQUAL(p.num_peers(), 100); TEST_EQUAL(p.num_connect_candidates(), 100); // trigger the removal of one peer ip_filter filter; filter.add_rule(address_v4::from_string("10.13.0.0") , address_v4::from_string("10.13.255.255"), ip_filter::blocked); p.apply_ip_filter(filter, &st, banned); TEST_EQUAL(st.erased.size(), 1); TEST_EQUAL(st.erased[0]->address(), address_v4::from_string("10.13.0.0")); TEST_EQUAL(p.num_peers(), 99); TEST_EQUAL(p.num_connect_candidates(), 99); } // test set_port_filter TORRENT_TEST(set_port_filter) { torrent_state st = init_state(allocator, ext_ip); std::vector
banned; mock_torrent t(&st); peer_list p; t.m_p = &p; for (int i = 0; i < 100; ++i) { p.add_peer(tcp::endpoint( address_v4((10 << 24) + ((i + 10) << 16)), i + 10), 0, 0, &st); TEST_EQUAL(st.erased.size(), 0); st.erased.clear(); } TEST_EQUAL(p.num_peers(), 100); TEST_EQUAL(p.num_connect_candidates(), 100); // trigger the removal of one peer port_filter filter; filter.add_rule(13, 13, port_filter::blocked); p.apply_port_filter(filter, &st, banned); TEST_EQUAL(st.erased.size(), 1); TEST_EQUAL(st.erased[0]->address(), address_v4::from_string("10.13.0.0")); TEST_EQUAL(st.erased[0]->port, 13); TEST_EQUAL(p.num_peers(), 99); TEST_EQUAL(p.num_connect_candidates(), 99); } // test set_max_failcount TORRENT_TEST(set_max_failcount) { torrent_state st = init_state(allocator, ext_ip); mock_torrent t(&st); peer_list p; t.m_p = &p; for (int i = 0; i < 100; ++i) { torrent_peer* peer = p.add_peer(tcp::endpoint( address_v4((10 << 24) + ((i + 10) << 16)), i + 10), 0, 0, &st); TEST_EQUAL(st.erased.size(), 0); st.erased.clear(); // every other peer has a failcount of 1 if (i % 2) p.inc_failcount(peer); } TEST_EQUAL(p.num_peers(), 100); TEST_EQUAL(p.num_connect_candidates(), 100); // set the max failcount to 1 and observe how half the peers no longer // are connect candidates st.max_failcount = 1; p.set_max_failcount(&st); TEST_EQUAL(p.num_connect_candidates(), 50); TEST_EQUAL(p.num_peers(), 100); } // test set_seed TORRENT_TEST(set_seed) { torrent_state st = init_state(allocator, ext_ip); mock_torrent t(&st); peer_list p; t.m_p = &p; for (int i = 0; i < 100; ++i) { torrent_peer* peer = p.add_peer(tcp::endpoint( address_v4((10 << 24) + ((i + 10) << 16)), i + 10), 0, 0, &st); TEST_EQUAL(st.erased.size(), 0); st.erased.clear(); // make every other peer a seed if (i % 2) p.set_seed(peer, true); } TEST_EQUAL(p.num_peers(), 100); TEST_EQUAL(p.num_connect_candidates(), 100); // now, the torrent completes and we're no longer interested in // connecting to seeds. Make sure half the peers are no longer // considered connect candidates st.is_finished = true; // this will make the peer_list recalculate the connect candidates std::vector peers; p.connect_one_peer(1, &st); TEST_EQUAL(p.num_connect_candidates(), 50); TEST_EQUAL(p.num_peers(), 100); } // test has_peer TORRENT_TEST(has_peer) { torrent_state st = init_state(allocator, ext_ip); std::vector
banned; mock_torrent t(&st); peer_list p; t.m_p = &p; torrent_peer* peer1 = add_peer(p, st, ep("10.10.0.1", 10)); torrent_peer* peer2 = add_peer(p, st, ep("10.10.0.2", 11)); TEST_EQUAL(p.num_peers(), 2); TEST_EQUAL(p.num_connect_candidates(), 2); TEST_EQUAL(p.has_peer(peer1), true); TEST_EQUAL(p.has_peer(peer2), true); ip_filter filter; filter.add_rule(address_v4::from_string("10.10.0.1") , address_v4::from_string("10.10.0.1"), ip_filter::blocked); p.apply_ip_filter(filter, &st, banned); TEST_EQUAL(st.erased.size(), 1); st.erased.clear(); TEST_EQUAL(p.num_peers(), 1); TEST_EQUAL(p.num_connect_candidates(), 1); TEST_EQUAL(p.has_peer(peer1), false); TEST_EQUAL(p.has_peer(peer2), true); } // test connect_candidates torrent_finish TORRENT_TEST(connect_candidates_finish) { torrent_state st = init_state(allocator, ext_ip); std::vector
banned; mock_torrent t(&st); peer_list p; t.m_p = &p; torrent_peer* peer1 = add_peer(p, st, ep("10.10.0.1", 10)); TEST_CHECK(peer1); p.set_seed(peer1, true); torrent_peer* peer2 = add_peer(p, st, ep("10.10.0.2", 11)); TEST_CHECK(peer2); p.set_seed(peer2, true); torrent_peer* peer3 = add_peer(p, st, ep("10.10.0.3", 11)); TEST_CHECK(peer3); p.set_seed(peer3, true); torrent_peer* peer4 = add_peer(p, st, ep("10.10.0.4", 11)); TEST_CHECK(peer4); torrent_peer* peer5 = add_peer(p, st, ep("10.10.0.5", 11)); TEST_CHECK(peer5); TEST_EQUAL(p.num_peers(), 5); TEST_EQUAL(p.num_connect_candidates(), 5); st.is_finished = true; // we're finished downloading now, only the non-seeds are // connect candidates // connect to one of them connect_peer(p, t, st); TEST_EQUAL(p.num_peers(), 5); // and there should be one left TEST_EQUAL(p.num_connect_candidates(), 1); } // test self-connection TORRENT_TEST(self_connection) { torrent_state st = init_state(allocator, ext_ip); mock_torrent t(&st); st.allow_multiple_connections_per_ip = false; peer_list p; t.m_p = &p; // add and connect peer torrent_peer* peer = add_peer(p, st, ep("10.0.0.2", 3000)); connect_peer(p, t, st); auto con_out = shared_from_this(peer->connection); con_out->set_local_ep(ep("10.0.0.2", 8080)); auto con_in = std::make_shared(&t, false, ep("10.0.0.2", 8080)); con_in->set_local_ep(ep("10.0.0.2", 3000)); p.new_connection(*con_in, 0, &st); // from the peer_list's point of view, this looks like we made one // outgoing connection and received an incoming one. Since they share // the exact same endpoints (IP ports) but just swapped source and // destination, the peer list is supposed to figure out that we connected // to ourself and disconnect it TEST_EQUAL(con_out->was_disconnected(), true); TEST_EQUAL(con_in->was_disconnected(), true); } // test double connection (both incoming) TORRENT_TEST(double_connection) { torrent_state st = init_state(allocator, ext_ip); mock_torrent t(&st); st.allow_multiple_connections_per_ip = false; peer_list p; t.m_p = &p; // we are 10.0.0.1 and the other peer is 10.0.0.2 // first incoming connection auto con1 = std::make_shared(&t, false, ep("10.0.0.2", 7528)); con1->set_local_ep(ep("10.0.0.1", 8080)); p.new_connection(*con1, 0, &st); // and the incoming connection auto con2 = std::make_shared(&t, false, ep("10.0.0.2", 3561)); con2->set_local_ep(ep("10.0.0.1", 8080)); p.new_connection(*con2, 0, &st); // the second incoming connection should be closed TEST_EQUAL(con1->was_disconnected(), false); TEST_EQUAL(con2->was_disconnected(), true); } // test double connection (we loose) TORRENT_TEST(double_connection_loose) { torrent_state st = init_state(allocator, ext_ip); mock_torrent t(&st); st.allow_multiple_connections_per_ip = false; peer_list p; t.m_p = &p; // we are 10.0.0.1 and the other peer is 10.0.0.2 // our outgoing connection torrent_peer* peer = add_peer(p, st, ep("10.0.0.2", 3000)); connect_peer(p, t, st); auto con_out = shared_from_this(peer->connection); con_out->set_local_ep(ep("10.0.0.1", 3163)); // and the incoming connection auto con_in = std::make_shared(&t, false, ep("10.0.0.2", 3561)); con_in->set_local_ep(ep("10.0.0.1", 8080)); p.new_connection(*con_in, 0, &st); // the rules are documented in peer_list.cpp TEST_EQUAL(con_out->was_disconnected(), true); TEST_EQUAL(con_in->was_disconnected(), false); } // test double connection (we win) TORRENT_TEST(double_connection_win) { torrent_state st = init_state(allocator, ext_ip); mock_torrent t(&st); st.allow_multiple_connections_per_ip = false; peer_list p; t.m_p = &p; // we are 10.0.0.1 and the other peer is 10.0.0.2 // our outgoing connection torrent_peer* peer = add_peer(p, st, ep("10.0.0.2", 8080)); connect_peer(p, t, st); auto con_out = shared_from_this(peer->connection); con_out->set_local_ep(ep("10.0.0.1", 3163)); //and the incoming connection auto con_in = std::make_shared(&t, false, ep("10.0.0.2", 3561)); con_in->set_local_ep(ep("10.0.0.1", 3000)); p.new_connection(*con_in, 0, &st); // the rules are documented in peer_list.cpp TEST_EQUAL(con_out->was_disconnected(), false); TEST_EQUAL(con_in->was_disconnected(), true); } // test incoming connection when we are at the list size limit TORRENT_TEST(incoming_size_limit) { torrent_state st = init_state(allocator, ext_ip); st.max_peerlist_size = 5; mock_torrent t(&st); st.allow_multiple_connections_per_ip = false; peer_list p; t.m_p = &p; torrent_peer* peer1 = add_peer(p, st, ep("10.0.0.1", 8080)); TEST_CHECK(peer1); TEST_EQUAL(p.num_peers(), 1); torrent_peer* peer2 = add_peer(p, st, ep("10.0.0.2", 8080)); TEST_CHECK(peer2); TEST_EQUAL(p.num_peers(), 2); torrent_peer* peer3 = add_peer(p, st, ep("10.0.0.3", 8080)); TEST_CHECK(peer3); TEST_EQUAL(p.num_peers(), 3); torrent_peer* peer4 = add_peer(p, st, ep("10.0.0.4", 8080)); TEST_CHECK(peer4); TEST_EQUAL(p.num_peers(), 4); torrent_peer* peer5 = add_peer(p, st, ep("10.0.0.5", 8080)); TEST_CHECK(peer5); TEST_EQUAL(p.num_peers(), 5); auto con_in = std::make_shared(&t, false, ep("10.0.1.2", 3561)); con_in->set_local_ep(ep("10.0.2.1", 3000)); // since we're already at 5 peers in the peer list, this call should // erase one of the existing ones. p.new_connection(*con_in, 0, &st); TEST_EQUAL(con_in->was_disconnected(), false); TEST_EQUAL(p.num_peers(), 5); // one of the previous ones should have been removed TEST_EQUAL(has_peer(p, ep("10.0.0.1", 8080)) + has_peer(p, ep("10.0.0.2", 8080)) + has_peer(p, ep("10.0.0.3", 8080)) + has_peer(p, ep("10.0.0.4", 8080)) + has_peer(p, ep("10.0.0.5", 8080)) , 4); } // test new peer when we are at the list size limit TORRENT_TEST(new_peer_size_limit) { torrent_state st = init_state(allocator, ext_ip); st.max_peerlist_size = 5; mock_torrent t(&st); st.allow_multiple_connections_per_ip = false; peer_list p; t.m_p = &p; torrent_peer* peer1 = add_peer(p, st, ep("10.0.0.1", 8080)); TEST_CHECK(peer1); TEST_EQUAL(p.num_peers(), 1); torrent_peer* peer2 = add_peer(p, st, ep("10.0.0.2", 8080)); TEST_CHECK(peer2); TEST_EQUAL(p.num_peers(), 2); torrent_peer* peer3 = add_peer(p, st, ep("10.0.0.3", 8080)); TEST_CHECK(peer3); TEST_EQUAL(p.num_peers(), 3); torrent_peer* peer4 = add_peer(p, st, ep("10.0.0.4", 8080)); TEST_CHECK(peer4); TEST_EQUAL(p.num_peers(), 4); torrent_peer* peer5 = add_peer(p, st, ep("10.0.0.5", 8080)); TEST_CHECK(peer5); TEST_EQUAL(p.num_peers(), 5); torrent_peer* peer6 = p.add_peer(ep("10.0.0.6", 8080), 0, 0, &st); TEST_CHECK(peer6 == nullptr); TEST_EQUAL(p.num_peers(), 5); // one of the connection should have been removed TEST_EQUAL(has_peer(p, ep("10.0.0.1", 8080)) + has_peer(p, ep("10.0.0.2", 8080)) + has_peer(p, ep("10.0.0.3", 8080)) + has_peer(p, ep("10.0.0.4", 8080)) + has_peer(p, ep("10.0.0.5", 8080)) + has_peer(p, ep("10.0.0.6", 8080)) , 5); } // TODO: test erasing peers // TODO: test update_peer_port with allow_multiple_connections_per_ip and without // TODO: test add i2p peers // TODO: test allow_i2p_mixed // TODO: test insert_peer failing with all error conditions // TODO: test IPv6 // TODO: test connect_to_peer() failing // TODO: test connection_closed // TODO: connect candidates recalculation when incrementing failcount