305 lines
21 KiB
C
305 lines
21 KiB
C
/* Детектор владеет профилем сокета; помощник с IP наблюдателя заменяется.
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* Настоящие ETCP/NCD/PING/STCP, без групповой автосвязности и без подмены времени. */
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#include "nat_fixture.h"
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#include "ntp_time.h"
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static void wait_profile(struct nat_fixture *fixture, struct ETCP_SOCKET *socket, uint8_t mapping, uint8_t inbound) {
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uint64_t end = get_time_tb() + 180000;
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while (get_time_tb() < end) {
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if (socket->address_profile.source && socket->address_profile.mapping == mapping &&
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socket->address_profile.inbound == inbound) return;
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uasync_poll(fixture->ua, 10);
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}
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struct nat_check_status status = {0};
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nat_detection_get_status(socket->instance->nat_det, socket, &status);
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DEBUG_ERROR(DEBUG_CATEGORY_NAT, "profile wait failed node=%016llx socket=%s mapping=%s inbound=%s phase=%u reason=%s",
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(unsigned long long)socket->instance->node_id, socket->name, address_mapping_name(socket->address_profile.mapping),
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address_inbound_name(socket->address_profile.inbound), status.phase, nat_check_reason_name(status.reason));
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abort();
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}
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static void check_snapshot(struct UTUN_INSTANCE *owner, struct ETCP_SOCKET *socket) {
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struct TOPO_NODE *node = topo_node_registry_find(owner->topo_groups, owner->node_id);
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assert(node && topo_node_verify(node) == 0);
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struct TOPO_SOCKMETA4 *meta = node->v4_sock_meta;
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while (meta && meta->id != socket->sock_id) meta = meta->next;
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assert(meta && meta->address_profile.mapping == socket->address_profile.mapping &&
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meta->address_profile.inbound == socket->address_profile.inbound &&
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meta->address_profile.source == ADDRESS_SOURCE_ETCP);
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struct address_profile saved = meta->address_profile;
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meta->address_profile.mapping = ADDRESS_MAP_DEPENDENT;
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assert(topo_node_verify(node) < 0);
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meta->address_profile = saved;
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meta->address_profile.source = ADDRESS_SOURCE_STUN;
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assert(topo_node_verify(node) < 0);
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meta->address_profile = saved;
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meta->address_profile.inbound = ADDRESS_IN_CONTACT;
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assert(topo_node_verify(node) < 0);
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meta->address_profile = saved; assert(topo_node_verify(node) == 0);
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sqlite3_stmt *statement = NULL;
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assert(sqlite3_prepare_v2(owner->topo_sqlite_db,
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"SELECT nat_mapping,nat_inbound,nat_source FROM node_addresses WHERE node_id=? AND socket_id=?",
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-1, &statement, NULL) == SQLITE_OK);
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sqlite3_bind_int64(statement, 1, (sqlite3_int64)owner->node_id); sqlite3_bind_int(statement, 2, socket->sock_id);
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assert(sqlite3_step(statement) == SQLITE_ROW);
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assert(sqlite3_column_int(statement, 0) == saved.mapping && sqlite3_column_int(statement, 1) == saved.inbound);
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assert(sqlite3_column_int(statement, 2) == ADDRESS_SOURCE_ETCP);
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sqlite3_finalize(statement);
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}
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/* Один TCP-пир даёт только наличие NAT и IP:0; локальный IP сам по себе достаточен для NAT. */
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static void test_tcp_presence(void) {
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struct nat_fixture fixture; nat_fixture_init(&fixture);
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struct UTUN_INSTANCE *owner = nat_fixture_node(&fixture, "127.0.0.2", NULL,
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"[server:tcp]\naddr=127.0.0.2:0\ntype=public\ntransport=tcp\n");
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struct UTUN_INSTANCE *peer = nat_fixture_node(&fixture, "127.0.0.3", NULL,
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"[server:tcp]\naddr=127.0.0.3:0\ntype=public\ntransport=tcp\n");
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nat_detection_set_automatic(owner->nat_det, 0); nat_detection_set_automatic(peer->nat_det, 0);
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struct ETCP_SOCKET *socket = test_etcp_bound_socket(owner, "tcp");
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struct ETCP_CONN *connection = nat_fixture_connect(&fixture, owner, "tcp", peer);
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wait_profile(&fixture, socket, ADDRESS_MAP_UNCHANGED, ADDRESS_IN_UNKNOWN);
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struct ETCP_LINK *link = connection->links;
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while (link && !link->is_tcp) link = link->next;
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assert(link && link->conn == socket && link->local_as_seen_by_peer.ss_family == AF_INET);
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assert(!((struct sockaddr_in *)&link->local_as_seen_by_peer)->sin_port);
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assert(route_ping_addr_equal(&socket->nat_addr, &socket->local_addr, 0));
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assert(!((struct sockaddr_in *)&socket->nat_addr)->sin_port);
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struct nat_check_status status;
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assert(!nat_detection_get_status(owner->nat_det, socket, &status) && !status.rounds && !status.helper);
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/* В обычном режиме loopback — непубличный IP: NAT известен без второго пира и без пробы listener. */
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nat_detection_set_allow_local(owner->nat_det, 0);
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nat_detection_socket_removed(owner->nat_det, socket);
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wait_profile(&fixture, socket, ADDRESS_MAP_UNKNOWN, ADDRESS_IN_UNKNOWN);
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assert(!socket->nat_addr.ss_family);
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struct sockaddr_storage remote = link->remote_addr, local = socket->interface_addr, observed = {0};
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((struct sockaddr_in *)&link->remote_addr)->sin_addr.s_addr = htonl(UINT32_C(0xc633640b));
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struct sockaddr_in *external = (struct sockaddr_in *)&observed;
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external->sin_family = AF_INET; external->sin_addr.s_addr = htonl(UINT32_C(0xcb00712c)); external->sin_port = htons(5555);
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nat_detection_tcp_observed(owner->nat_det, link, &local, &observed);
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assert(socket->address_profile.mapping == ADDRESS_MAP_UNKNOWN && socket->address_profile.source == ADDRESS_SOURCE_ETCP);
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assert(route_ping_addr_equal(&socket->nat_addr, &observed, 0) && !((struct sockaddr_in *)&socket->nat_addr)->sin_port);
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check_snapshot(owner, socket);
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struct TOPO_NODE *snapshot = topo_node_registry_find(owner->topo_groups, owner->node_id);
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int found = 0;
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for (const struct TOPO_ADDR4 *a = snapshot->v4_addrs; a; a = a->next) {
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if (a->socket_id != socket->sock_id || a->type != TOPO_ADDR_NAT) continue;
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assert(!a->port && (a->protocol & TOPO_PROTO_TCP) && !memcmp(a->addr, &external->sin_addr, 4)); found++;
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}
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assert(found == 1);
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sqlite3_stmt *statement = NULL;
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assert(sqlite3_prepare_v2(owner->topo_sqlite_db,
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"SELECT port,addr_type FROM node_addresses WHERE node_id=? AND socket_id=? AND address_kind=?",
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-1, &statement, NULL) == SQLITE_OK);
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sqlite3_bind_int64(statement, 1, (sqlite3_int64)owner->node_id); sqlite3_bind_int(statement, 2, socket->sock_id);
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sqlite3_bind_int(statement, 3, TOPO_ADDR_NAT);
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assert(sqlite3_step(statement) == SQLITE_ROW && !sqlite3_column_int(statement, 0));
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assert(sqlite3_column_int(statement, 1) == ADDR_TYPE_NAT); sqlite3_finalize(statement);
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/* Совпавший публичный IP означает отсутствие NAT даже при разных портах. */
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local = observed; ((struct sockaddr_in *)&local)->sin_port = htons(12345);
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nat_detection_tcp_observed(owner->nat_det, link, &local, &observed);
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assert(socket->address_profile.mapping == ADDRESS_MAP_UNCHANGED && socket->address_profile.inbound == ADDRESS_IN_UNKNOWN);
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external->sin_addr.s_addr = htonl(UINT32_C(0xcb00712d));
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nat_detection_tcp_observed(owner->nat_det, link, &local, &observed);
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assert(socket->address_profile.mapping == ADDRESS_MAP_UNKNOWN);
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struct sockaddr_storage saved = socket->nat_addr;
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external->sin_addr.s_addr = htonl(UINT32_C(0xc0a80101));
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nat_detection_tcp_observed(owner->nat_det, link, &local, &observed);
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assert(route_ping_addr_equal(&socket->nat_addr, &saved, 1));
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external->sin_addr.s_addr = htonl(UINT32_C(0xcb00712c));
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link->remote_addr = remote; /* LAN-узел также не годится для наблюдения интернет-адреса. */
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nat_detection_tcp_observed(owner->nat_det, link, &local, &observed);
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assert(route_ping_addr_equal(&socket->nat_addr, &saved, 1));
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assert(!nat_detection_get_status(owner->nat_det, socket, &status) && !status.rounds && !status.helper);
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nat_fixture_cleanup(&fixture);
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DEBUG_INFO(DEBUG_CATEGORY_NAT, "PASS TCP NAT presence: one peer, public/private IP, ignored ports, signed IP:0 and SQLite");
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}
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/* Недостаточная UTUN-группа и достаточная CHAT-группа; helper доступен только через TCP next hop. */
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static void test_all_groups_tcp(void) {
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struct nat_fixture fixture; nat_fixture_init(&fixture);
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struct UTUN_INSTANCE *owner = nat_fixture_node(&fixture, "127.0.0.2", NULL, "[chatserver]\ngroup_autoconnect=0\n");
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struct UTUN_INSTANCE *observer = nat_fixture_node(&fixture, "127.0.0.3", NULL,
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"[server:tcp]\naddr=127.0.0.3:0\ntype=public\ntransport=tcp\n[chatserver]\ngroup_autoconnect=0\n");
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struct UTUN_INSTANCE *helper = nat_fixture_node(&fixture, "127.0.0.4", NULL,
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"[server:tcp]\naddr=127.0.0.4:0\ntype=public\ntransport=tcp\n[chatserver]\ngroup_autoconnect=0\n");
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nat_detection_set_automatic(observer->nat_det, 0); nat_detection_set_automatic(helper->nat_det, 0);
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/* NODEINFO обновляет общий NCD всеми парами: helper UDP оставляем для проб, без транспортного приёма INIT. */
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struct ETCP_SOCKET *helper_socket = test_etcp_bound_socket(helper, "udp");
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assert(!uasync_remove_socket_t(fixture.ua, helper_socket->fd)); helper_socket->socket_id = NULL;
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struct ETCP_CONN *ab = nat_fixture_connect(&fixture, owner, "udp", observer);
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struct ETCP_SOCKET *socket = test_etcp_bound_socket(owner, "udp");
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nat_detection_request_check_all(owner->nat_det);
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struct nat_check_status status = {0}; uint64_t end = get_time_tb() + 30000;
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do { uasync_poll(fixture.ua, 10); assert(!nat_detection_get_status(owner->nat_det, socket, &status)); }
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while (get_time_tb() < end && status.reason != NAT_REASON_NO_HELPER);
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assert(status.reason == NAT_REASON_NO_HELPER && !socket->address_profile.source);
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struct UTUN_INSTANCE *nodes[] = {owner, observer, helper};
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struct TOPO_GROUP *groups[3]; uint8_t signature[64] = {1};
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for (unsigned i = 0; i < 3; i++) {
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sqlite3 *db = nodes[i]->topo_sqlite_db;
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assert(!topo_node_sqlite_channel_put(db, "42", "NAT group test", owner->node_id, owner->my_keys.public_key,
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NULL, owner->my_ed25519_pubkey, NULL, signature));
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for (unsigned j = 0; j < 3; j++) {
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assert(!topo_node_sqlite_node_update_verified(db, nodes[j]->node_id, nodes[j]->name,
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nodes[j]->my_keys.public_key, nodes[j]->my_ed25519_pubkey, 1, 1));
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assert(!topo_node_sqlite_member_block_put(db, "42", nodes[j]->node_id, signature, 1, signature, 1,
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nodes[j]->my_keys.public_key, nodes[j]->my_ed25519_pubkey, "{}", NULL, 0, signature));
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}
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groups[i] = topo_groups_create_group(nodes[i]->topo_groups, 42, TOPO_GROUP_TYPE_CHAT, "42");
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assert(groups[i]);
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}
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assert(!topo_group_new_conn(groups[0], ab));
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struct TOPO_NODE *node = topo_node_registry_find(helper->topo_groups, helper->node_id);
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struct NODE_CONN_DIRECT **handle = &fixture.handles[fixture.handle_count++];
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assert(node_conn_direct_open_node(observer, helper->node_id, NULL, NULL, handle, node,
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test_etcp_bound_socket(observer, "tcp")) != NCD_ERR);
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struct ETCP_CONN *bc = NULL; end = get_time_tb() + 50000;
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do { uasync_poll(fixture.ua, 10); bc = node_conn_direct_get_conn(*handle); }
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while (get_time_tb() < end && (!bc || !bc->links_up));
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assert(bc && bc->links_up && !topo_group_new_conn(groups[1], bc));
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for (struct ETCP_LINK *link = bc->links; link; link = link->next) if (link->link_status) assert(link->is_tcp);
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end = get_time_tb() + 50000;
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while (get_time_tb() < end && (!topo_group_peer_ready(groups[0], observer->node_id) ||
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!topo_group_peer_ready(groups[1], helper->node_id) || !topo_node_best_path(topo_node_find_by_id(groups[0], helper->node_id))))
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uasync_poll(fixture.ua, 10);
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assert(topo_group_peer_ready(groups[0], observer->node_id) && topo_group_peer_ready(groups[1], helper->node_id));
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assert(!instance_find_conn(owner, helper->node_id));
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wait_profile(&fixture, socket, ADDRESS_MAP_UNCHANGED, ADDRESS_IN_OPEN);
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assert(!nat_detection_get_status(owner->nat_det, socket, &status) && status.group_id == 42 && status.helper == helper->node_id);
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for (struct ETCP_LINK *link = bc->links; link; link = link->next) if (link->link_status) assert(link->is_tcp);
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assert(!instance_find_conn(owner, helper->node_id));
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/* Реально заблокированный UDP endpoint: UNKNOWN не запускает лишних проверок, подписанный OPEN запускает одну. */
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uint64_t verified_round = status.round;
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struct NODE_CONN_DIRECT **failed_handle = &fixture.handles[fixture.handle_count++];
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node = topo_node_registry_find(owner->topo_groups, helper->node_id);
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assert(node_conn_direct_open_node(owner, helper->node_id, NULL, NULL, failed_handle, node, socket) != NCD_ERR);
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struct ETCP_CONN *failed = node_conn_direct_get_conn(*failed_handle);
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end = get_time_tb() + owner->etcp_connect_timeout_tb + 1000;
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while (get_time_tb() < end) uasync_poll(fixture.ua, 10);
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assert(failed && !failed->links_up && failed->links && failed->links->init_retry_count);
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assert(!nat_detection_get_status(owner->nat_det, socket, &status) && status.round == verified_round);
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helper_socket->address_profile = (struct address_profile){ADDRESS_MAP_UNCHANGED, ADDRESS_IN_CONTACT, ADDRESS_SOURCE_ETCP};
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assert(topo_node_update_my_addresses(helper) >= 0);
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const struct TOPO_SOCKMETA4 *meta = NULL;
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end = get_time_tb() + 30000;
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do {
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uasync_poll(fixture.ua, 10); node = topo_node_registry_find(owner->topo_groups, helper->node_id);
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meta = node ? node->v4_sock_meta : NULL;
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while (meta && meta->id != helper_socket->sock_id) meta = meta->next;
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} while (get_time_tb() < end && (!meta || meta->address_profile.inbound != ADDRESS_IN_CONTACT));
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assert(meta && meta->address_profile.inbound == ADDRESS_IN_CONTACT);
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nat_detection_connection_failed(owner->nat_det, failed, 0);
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assert(!nat_detection_get_status(owner->nat_det, socket, &status) && status.round == verified_round);
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nat_detection_connection_failed(owner->nat_det, failed, 1);
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end = get_time_tb() + 400000;
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do { uasync_poll(fixture.ua, 10); assert(!nat_detection_get_status(owner->nat_det, socket, &status)); }
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while (get_time_tb() < end && (status.round == verified_round || status.phase || status.cycling));
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assert(status.round != verified_round && !status.phase && !status.cycling);
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assert(socket->address_profile.mapping == ADDRESS_MAP_UNCHANGED && socket->address_profile.inbound == ADDRESS_IN_OPEN);
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verified_round = status.round;
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nat_detection_connection_failed(owner->nat_det, failed, 1);
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end = get_time_tb() + 10000;
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while (get_time_tb() < end) uasync_poll(fixture.ua, 10);
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assert(!nat_detection_get_status(owner->nat_det, socket, &status) && status.round == verified_round);
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uint64_t old_round = status.round;
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assert(!nat_detection_request_check_socket(owner->nat_det, socket, observer->node_id));
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end = get_time_tb() + 30000;
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do { uasync_poll(fixture.ua, 10); assert(!nat_detection_get_status(owner->nat_det, socket, &status)); }
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while (get_time_tb() < end && (status.round == old_round || !status.phase));
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assert(status.phase && status.group_id == 42);
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topo_groups_remove_group(owner->topo_groups, 42);
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assert(!nat_detection_get_status(owner->nat_det, socket, &status) && !status.phase && !status.group_id);
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assert(socket->address_profile.mapping == ADDRESS_MAP_UNCHANGED && socket->address_profile.inbound == ADDRESS_IN_OPEN);
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assert(ab->links_up && topo_group_peer_ready(topo_groups_find(owner->topo_groups, TOPO_GROUP_UTUN), observer->node_id));
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nat_fixture_cleanup(&fixture);
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}
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int main(void) {
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debug_config_init(); debug_set_level(DEBUG_LEVEL_WARN); debug_set_category_level(DEBUG_CATEGORY_NAT, DEBUG_LEVEL_DEBUG);
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if (getenv("UTUN_TEST_DEBUG")) debug_set_category_level(DEBUG_CATEGORY_BGP, DEBUG_LEVEL_DEBUG);
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struct nat_fixture fixture; nat_fixture_init(&fixture);
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struct SC_MYKEYS first, second;
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assert(sc_generate_keypair(&first) == SC_OK && sc_generate_keypair(&second) == SC_OK);
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if (sc_derive_node_id_from_pubkey(first.public_key) > sc_derive_node_id_from_pubkey(second.public_key)) {
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struct SC_MYKEYS swap = first; first = second; second = swap;
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}
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struct UTUN_INSTANCE *owner = nat_fixture_node(&fixture, "127.0.0.2", NULL,
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"[server:second]\naddr=127.0.0.5:0\ntype=public\n"
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"[server:tcp]\naddr=127.0.0.2:0\ntype=public\ntransport=tcp\n");
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struct UTUN_INSTANCE *observer = nat_fixture_node(&fixture, "127.0.0.3", NULL, NULL);
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struct UTUN_INSTANCE *same_ip = nat_fixture_node(&fixture, "127.0.0.3", &first, NULL);
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struct UTUN_INSTANCE *helper = nat_fixture_node(&fixture, "127.0.0.4", &second, NULL);
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struct ETCP_SOCKET *socket = test_etcp_bound_socket(owner, "udp");
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struct ETCP_SOCKET *second_socket = test_etcp_bound_socket(owner, "second");
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struct ETCP_SOCKET *tcp = test_etcp_bound_socket(owner, "tcp");
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struct ETCP_SOCKET *observer_socket = test_etcp_bound_socket(observer, "udp");
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assert(socket->sock_id != observer_socket->sock_id);
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/* B уже знает обоих помощниках, но A не отправлял UDP ни одному из них. */
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nat_fixture_connect(&fixture, observer, "udp", same_ip);
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nat_fixture_connect(&fixture, observer, "udp", helper);
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struct ETCP_CONN *connection = nat_fixture_connect(&fixture, owner, "udp", observer);
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assert(connection->links && connection->links->remote_socket_id == observer_socket->sock_id);
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assert(connection->links->local_as_seen_by_peer.ss_family == AF_INET);
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assert(route_ping_addr_equal(&connection->links->local_as_seen_by_peer, &socket->local_addr, 1));
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nat_fixture_connect(&fixture, observer, "udp", owner);
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owner->ntp.reachable = 0; /* ни измерение, ни публикация не требуют интернет-NTP */
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nat_detection_request_check_all(owner->nat_det);
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wait_profile(&fixture, socket, ADDRESS_MAP_UNCHANGED, ADDRESS_IN_OPEN);
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wait_profile(&fixture, second_socket, ADDRESS_MAP_UNCHANGED, ADDRESS_IN_OPEN);
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struct nat_check_status status;
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assert(nat_detection_get_status(owner->nat_det, socket, &status) == 0);
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assert(status.group_id == TOPO_GROUP_UTUN && status.helper == helper->node_id);
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assert(status.observer == observer->node_id || status.observer == same_ip->node_id);
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struct nat_check_status second_status;
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assert(nat_detection_get_status(owner->nat_det, second_socket, &second_status) == 0);
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assert(status.round != second_status.round);
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check_snapshot(owner, socket);
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check_snapshot(owner, second_socket);
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assert(tcp->address_profile.mapping == ADDRESS_MAP_UNKNOWN && tcp->address_profile.inbound == ADDRESS_IN_UNKNOWN);
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/* Профиль B не заимствует профиль A, даже когда транспорт переиспользуется в обе стороны. */
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assert(!route_ping_addr_equal(&socket->local_addr, &observer_socket->local_addr, 1));
|
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assert(!route_ping_addr_equal(&socket->local_addr, &test_etcp_bound_socket(helper, "udp")->local_addr, 1));
|
|
|
|
/* Неполный повторный ingress сохраняет успех и не изменяет подписанный NODEINFO. */
|
|
uint64_t old_round = status.round;
|
|
struct TOPO_NODE *snapshot = topo_node_registry_find(owner->topo_groups, owner->node_id);
|
|
uint64_t old_timestamp = snapshot->timestamp;
|
|
nat_detection_request_check_all(owner->nat_det);
|
|
uint64_t end = get_time_tb() + 180000;
|
|
do { uasync_poll(fixture.ua, 10); assert(!nat_detection_get_status(owner->nat_det, socket, &status)); }
|
|
while (get_time_tb() < end && (status.round == old_round || status.phase || status.cycling));
|
|
assert(status.round != old_round && !status.phase && status.reason == NAT_REASON_CONTACT_HISTORY);
|
|
assert(socket->address_profile.mapping == ADDRESS_MAP_UNCHANGED && socket->address_profile.inbound == ADDRESS_IN_OPEN);
|
|
assert(snapshot->timestamp == old_timestamp && topo_node_verify(snapshot) == 0);
|
|
|
|
/* Закрытие endpoint посреди запроса и переиспользование ID/порта: старые ответы не применяются. */
|
|
nat_detection_request_check_all(owner->nat_det);
|
|
end = get_time_tb() + 20000;
|
|
do { uasync_poll(fixture.ua, 0); nat_detection_get_status(owner->nat_det, socket, &status); }
|
|
while (!status.phase && get_time_tb() < end);
|
|
assert(status.phase);
|
|
uint8_t old_id = socket->sock_id; uint64_t old_generation = socket->generation;
|
|
struct CFG_SERVER recreated; memset(&recreated, 0, sizeof(recreated));
|
|
recreated.ip = socket->local_addr; recreated.type = CFG_SERVER_TYPE_PUBLIC; recreated.mtu = 1500; recreated.fib = -1;
|
|
snprintf(recreated.name, sizeof(recreated.name), "recreated");
|
|
etcp_socket_remove(socket);
|
|
owner->next_socket_id = old_id;
|
|
socket = etcp_socket_add(owner, &recreated);
|
|
assert(socket && socket->sock_id == old_id && socket->generation != old_generation);
|
|
end = get_time_tb() + 2000;
|
|
while (get_time_tb() < end) uasync_poll(fixture.ua, 10);
|
|
assert(socket->address_profile.mapping == ADDRESS_MAP_UNKNOWN && socket->address_profile.inbound == ADDRESS_IN_UNKNOWN);
|
|
|
|
nat_fixture_cleanup(&fixture);
|
|
test_all_groups_tcp();
|
|
test_tcp_presence();
|
|
return 0;
|
|
}
|