/* Copyright 2019 by sysmocom s.f.m.c. GmbH * * All Rights Reserved * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see . * */ #include #include #include #include #include #include #include #include #include #include #include #include void *ctx = NULL; #define TEST_IP OSMO_MSLOOKUP_MDNS_IP4 #define TEST_PORT OSMO_MSLOOKUP_MDNS_PORT #define TEST_DOMAIN_SUFFIX "mslookup_client_mdns_test.dgsm.osmocom.org" /* * Test server (emulates the mDNS server in OsmoHLR) and client */ struct osmo_mdns_sock *server_mc; static void server_reply(struct osmo_mslookup_query *query, uint16_t packet_id) { struct osmo_mslookup_result result = {0}; struct msgb *msg; result.rc = OSMO_MSLOOKUP_RC_RESULT; result.age = 3; osmo_sockaddr_str_from_str(&result.host_v4, "42.42.42.42", 444); osmo_sockaddr_str_from_str(&result.host_v6, "1122:3344:5566:7788:99aa:bbcc:ddee:ff00", 666); msg = osmo_mdns_result_encode(ctx, packet_id, query, &result, TEST_DOMAIN_SUFFIX); OSMO_ASSERT(msg); OSMO_ASSERT(osmo_mdns_sock_send(server_mc, msg) == 0); } static int server_recv(struct osmo_fd *osmo_fd, unsigned int what) { int n; uint8_t buffer[1024]; uint16_t packet_id; struct osmo_mslookup_query *query; fprintf(stderr, "%s\n", __func__); /* Parse the message and print it */ n = read(osmo_fd->fd, buffer, sizeof(buffer)); OSMO_ASSERT(n >= 0); query = osmo_mdns_query_decode(ctx, buffer, n, &packet_id, TEST_DOMAIN_SUFFIX); if (!query) return -1; /* server receiving own answer is expected */ fprintf(stderr, "received request\n"); server_reply(query, packet_id); talloc_free(query); return n; } static void server_init(void) { fprintf(stderr, "%s\n", __func__); server_mc = osmo_mdns_sock_init(ctx, TEST_IP, TEST_PORT, server_recv, NULL, 0); OSMO_ASSERT(server_mc); } static void server_stop(void) { fprintf(stderr, "%s\n", __func__); OSMO_ASSERT(server_mc); osmo_mdns_sock_cleanup(server_mc); server_mc = NULL; } struct osmo_mslookup_client* client; struct osmo_mslookup_client_method* client_method; static void client_init(void) { fprintf(stderr, "%s\n", __func__); client = osmo_mslookup_client_new(ctx); OSMO_ASSERT(client); client_method = osmo_mslookup_client_add_mdns(client, TEST_IP, TEST_PORT, 1337, TEST_DOMAIN_SUFFIX); OSMO_ASSERT(client_method); } static void client_recv(struct osmo_mslookup_client *client, uint32_t request_handle, const struct osmo_mslookup_query *query, const struct osmo_mslookup_result *result) { char buf[256]; fprintf(stderr, "%s\n", __func__); fprintf(stderr, "client_recv(): %s\n", osmo_mslookup_result_name_b(buf, sizeof(buf), query, result)); osmo_mslookup_client_request_cancel(client, request_handle); } static void client_query(void) { struct osmo_mslookup_id id = {.type = OSMO_MSLOOKUP_ID_IMSI, .imsi = "123456789012345"}; const struct osmo_mslookup_query query = { .service = "gsup.hlr", .id = id, }; struct osmo_mslookup_query_handling handling = { .result_timeout_milliseconds = 2000, .result_cb = client_recv, }; fprintf(stderr, "%s\n", __func__); osmo_mslookup_client_request(client, &query, &handling); } static void client_stop(void) { fprintf(stderr, "%s\n", __func__); osmo_mslookup_client_free(client); client = NULL; } const struct timeval fake_time_start_time = { 0, 0 }; #define fake_time_passes(secs, usecs) do \ { \ struct timeval diff; \ osmo_gettimeofday_override_add(secs, usecs); \ osmo_clock_override_add(CLOCK_MONOTONIC, secs, usecs * 1000); \ timersub(&osmo_gettimeofday_override_time, &fake_time_start_time, &diff); \ LOGP(DMSLOOKUP, LOGL_DEBUG, "Total time passed: %d.%06d s\n", \ (int)diff.tv_sec, (int)diff.tv_usec); \ osmo_timers_prepare(); \ osmo_timers_update(); \ } while (0) static void fake_time_start(void) { struct timespec *clock_override; osmo_gettimeofday_override_time = fake_time_start_time; osmo_gettimeofday_override = true; clock_override = osmo_clock_override_gettimespec(CLOCK_MONOTONIC); OSMO_ASSERT(clock_override); clock_override->tv_sec = fake_time_start_time.tv_sec; clock_override->tv_nsec = fake_time_start_time.tv_usec * 1000; osmo_clock_override_enable(CLOCK_MONOTONIC, true); fake_time_passes(0, 0); } static void test_server_client(void) { fprintf(stderr, "-- %s --\n", __func__); server_init(); client_init(); client_query(); /* Let the server receive the query and indirectly call server_recv(). As side effect of using the same IP and * port, the client will also receive its own question. The client will dismiss its own question, as it is just * looking for answers. */ OSMO_ASSERT(osmo_select_main_ctx(1) == 1); /* Let the mslookup client receive the answer (also same side effect as above). It does not call the callback * (client_recv()) just yet, because it is waiting for the best result within two seconds. */ OSMO_ASSERT(osmo_select_main_ctx(1) == 1); /* Time flies by, client_recv() gets called. */ fake_time_passes(5, 0); server_stop(); client_stop(); } bool is_multicast_enabled(void) { bool ret = true; struct addrinfo *ai; int sock; struct addrinfo hints = {0}; struct ip_mreq multicast_req = {0}; in_addr_t iface = INADDR_ANY; hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_DGRAM; hints.ai_flags = (AI_PASSIVE | AI_NUMERICHOST); assert(getaddrinfo("239.192.23.42", "4266", &hints, &ai) == 0); sock = socket(ai->ai_family, ai->ai_socktype, 0); assert(sock != -1); assert(setsockopt(sock, IPPROTO_IP, IP_MULTICAST_IF, (char*)&iface, sizeof(iface)) != -1); memcpy(&multicast_req.imr_multiaddr, &((struct sockaddr_in*)(ai->ai_addr))->sin_addr, sizeof(multicast_req.imr_multiaddr)); multicast_req.imr_interface.s_addr = htonl(INADDR_ANY); if (setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char*)&multicast_req, sizeof(multicast_req)) == -1) ret = false; freeaddrinfo(ai); return ret; } /* * Run all tests */ int main(int argc, char **argv) { if (!is_multicast_enabled()) { fprintf(stderr, "ERROR: multicast is disabled! (OS#4361)"); return 1; } talloc_enable_null_tracking(); ctx = talloc_named_const(NULL, 0, "main"); osmo_init_logging2(ctx, NULL); log_set_print_filename2(osmo_stderr_target, LOG_FILENAME_NONE); log_set_print_level(osmo_stderr_target, 0); log_set_print_category(osmo_stderr_target, 0); log_set_print_category_hex(osmo_stderr_target, 0); log_set_use_color(osmo_stderr_target, 0); log_set_category_filter(osmo_stderr_target, DMSLOOKUP, true, LOGL_DEBUG); fake_time_start(); test_server_client(); log_fini(); OSMO_ASSERT(talloc_total_blocks(ctx) == 1); talloc_free(ctx); OSMO_ASSERT(talloc_total_blocks(NULL) == 1); talloc_disable_null_tracking(); return 0; }