int lan_discovery_send(uint16_t port, DHT *dht) { uint8_t data[CRYPTO_PUBLIC_KEY_SIZE + 1]; data[0] = NET_PACKET_LAN_DISCOVERY; id_copy(data + 1, dht_get_self_public_key(dht)); send_broadcasts(dht_get_net(dht), port, data, 1 + CRYPTO_PUBLIC_KEY_SIZE); int res = -1; IP_Port ip_port; ip_port.port = port; /* IPv6 multicast */ if (net_family(dht_get_net(dht)) == TOX_AF_INET6) { ip_port.ip = broadcast_ip(TOX_AF_INET6, TOX_AF_INET6); if (ip_isset(&ip_port.ip)) { if (sendpacket(dht_get_net(dht), ip_port, data, 1 + CRYPTO_PUBLIC_KEY_SIZE) > 0) { res = 1; } } } /* IPv4 broadcast (has to be IPv4-in-IPv6 mapping if socket is TOX_AF_INET6 */ ip_port.ip = broadcast_ip(net_family(dht_get_net(dht)), TOX_AF_INET); if (ip_isset(&ip_port.ip)) { if (sendpacket(dht_get_net(dht), ip_port, data, 1 + CRYPTO_PUBLIC_KEY_SIZE)) { res = 1; } } return res; }
Onion_Announce *new_onion_announce(Mono_Time *mono_time, DHT *dht) { if (dht == nullptr) { return nullptr; } Onion_Announce *onion_a = (Onion_Announce *)calloc(1, sizeof(Onion_Announce)); if (onion_a == nullptr) { return nullptr; } onion_a->mono_time = mono_time; onion_a->dht = dht; onion_a->net = dht_get_net(dht); new_symmetric_key(onion_a->secret_bytes); networking_registerhandler(onion_a->net, NET_PACKET_ANNOUNCE_REQUEST, &handle_announce_request, onion_a); networking_registerhandler(onion_a->net, NET_PACKET_ONION_DATA_REQUEST, &handle_data_request, onion_a); return onion_a; }
void lan_discovery_kill(DHT *dht) { networking_registerhandler(dht_get_net(dht), NET_PACKET_LAN_DISCOVERY, nullptr, nullptr); }
void lan_discovery_init(DHT *dht) { networking_registerhandler(dht_get_net(dht), NET_PACKET_LAN_DISCOVERY, &handle_LANdiscovery, dht); }
int main(int argc, char *argv[]) { if (argc == 2 && !tox_strncasecmp(argv[1], "-h", 3)) { printf("Usage (connected) : %s [--ipv4|--ipv6] IP PORT KEY\n", argv[0]); printf("Usage (unconnected): %s [--ipv4|--ipv6]\n", argv[0]); exit(0); } /* let user override default by cmdline */ bool ipv6enabled = TOX_ENABLE_IPV6_DEFAULT; /* x */ int argvoffset = cmdline_parsefor_ipv46(argc, argv, &ipv6enabled); if (argvoffset < 0) { exit(1); } /* Initialize networking - Bind to ip 0.0.0.0 / [::] : PORT */ IP ip; ip_init(&ip, ipv6enabled); Logger *logger = logger_new(); if (MIN_LOGGER_LEVEL == LOGGER_LEVEL_TRACE || MIN_LOGGER_LEVEL == LOGGER_LEVEL_DEBUG) { logger_callback_log(logger, print_log, nullptr, nullptr); } Mono_Time *mono_time = mono_time_new(); DHT *dht = new_dht(logger, mono_time, new_networking(logger, ip, PORT), true); Onion *onion = new_onion(mono_time, dht); Onion_Announce *onion_a = new_onion_announce(mono_time, dht); #ifdef DHT_NODE_EXTRA_PACKETS bootstrap_set_callbacks(dht_get_net(dht), DHT_VERSION_NUMBER, DHT_MOTD, sizeof(DHT_MOTD)); #endif if (!(onion && onion_a)) { printf("Something failed to initialize.\n"); exit(1); } perror("Initialization"); manage_keys(dht); printf("Public key: "); uint32_t i; #ifdef TCP_RELAY_ENABLED #define NUM_PORTS 3 uint16_t ports[NUM_PORTS] = {443, 3389, PORT}; TCP_Server *tcp_s = new_TCP_server(ipv6enabled, NUM_PORTS, ports, dht_get_self_secret_key(dht), onion); if (tcp_s == nullptr) { printf("TCP server failed to initialize.\n"); exit(1); } #endif const char *const public_id_filename = "PUBLIC_ID.txt"; FILE *file = fopen(public_id_filename, "w"); if (file == nullptr) { printf("Could not open file \"%s\" for writing. Exiting...\n", public_id_filename); exit(1); } for (i = 0; i < 32; i++) { const uint8_t *const self_public_key = dht_get_self_public_key(dht); printf("%02X", self_public_key[i]); fprintf(file, "%02X", self_public_key[i]); } fclose(file); printf("\n"); printf("Port: %u\n", net_ntohs(net_port(dht_get_net(dht)))); if (argc > argvoffset + 3) { printf("Trying to bootstrap into the network...\n"); uint16_t port = net_htons(atoi(argv[argvoffset + 2])); uint8_t *bootstrap_key = hex_string_to_bin(argv[argvoffset + 3]); int res = dht_bootstrap_from_address(dht, argv[argvoffset + 1], ipv6enabled, port, bootstrap_key); free(bootstrap_key); if (!res) { printf("Failed to convert \"%s\" into an IP address. Exiting...\n", argv[argvoffset + 1]); exit(1); } } int is_waiting_for_dht_connection = 1; uint64_t last_LANdiscovery = 0; lan_discovery_init(dht); while (1) { mono_time_update(mono_time); if (is_waiting_for_dht_connection && dht_isconnected(dht)) { printf("Connected to other bootstrap node successfully.\n"); is_waiting_for_dht_connection = 0; } do_dht(dht); if (mono_time_is_timeout(mono_time, last_LANdiscovery, is_waiting_for_dht_connection ? 5 : LAN_DISCOVERY_INTERVAL)) { lan_discovery_send(net_htons(PORT), dht); last_LANdiscovery = mono_time_get(mono_time); } #ifdef TCP_RELAY_ENABLED do_TCP_server(tcp_s, mono_time); #endif networking_poll(dht_get_net(dht), nullptr); c_sleep(1); } }