/* * Internal callback used to establish an outbound connection. */ static void net_connect_job_internal_cb(struct net_connection* con, int event, void* ptr) { int ret; struct net_connect_job* job = net_con_get_ptr(con); struct net_connect_job* next_job = job->next; struct net_connect_handle* handle = job->handle; if (event == NET_EVENT_TIMEOUT) { // FIXME: Try next address, or if no more addresses left declare failure to connect. if (job->addr.ss_family == AF_INET6) { net_connect_job_stop(job); if (!next_job) { LOG_TRACE("No more IPv6 addresses to try!"); } } else { net_connect_job_stop(job); if (!next_job) { LOG_TRACE("No more IPv4 addresses to try!"); } } if (net_connect_depleted(handle)) { LOG_TRACE("No more addresses left. Unable to connect!"); net_connect_callback(handle, net_connect_status_timeout, NULL); } return; } if (event == NET_EVENT_WRITE) { net_connect_job_process(job); } }
static void event_callback(struct net_connection* con, int events, void *arg) { ADC_TRACE; struct ADC_client* client = (struct ADC_client*) net_con_get_ptr(con); switch (client->state) { case ps_conn: if (events == NET_EVENT_TIMEOUT) { client->callback(client, ADC_CLIENT_DISCONNECTED, 0); return; } break; #ifdef SSL_SUPPORT case ps_conn_ssl: if (events == NET_EVENT_TIMEOUT) { client->callback(client, ADC_CLIENT_DISCONNECTED, 0); return; } ADC_client_on_connected_ssl(client); break; #endif default: if (events & NET_EVENT_READ) { if (ADC_client_recv(client) == -1) { ADC_client_on_disconnected(client); } } if (events & NET_EVENT_WRITE) { ADC_client_send_queue(client); } } }
static void probe_net_event(struct net_connection* con, int events, void *arg) { struct hub_probe* probe = (struct hub_probe*) net_con_get_ptr(con); if (events == NET_EVENT_TIMEOUT) { char buf[512]; ssize_t len = snprintf(buf, sizeof(buf), "This hub runs on ADC protocol only!\n\nThese are the possible reasons why you see this message:\n\n * you used address without protocol specification, e.g. example.com:1234 instead of adc://example.com:1234\n * your client does not support ADC protocol.\n|$ForceMove %s|", probe->hub->config->nmdc_only_redirect_addr); net_con_send(con, buf, (size_t) len); probe_destroy(probe); return; } if (events & NET_EVENT_READ) { int bytes = net_con_peek(con, probe_recvbuf, PROBE_RECV_SIZE); if (bytes < 0) { probe_destroy(probe); return; } if (bytes >= 4) { if (memcmp(probe_recvbuf, "HSUP", 4) == 0) { LOG_TRACE("Probed ADC"); #ifdef SSL_SUPPORT if (probe->hub->config->tls_enable && probe->hub->config->tls_require) { LOG_TRACE("Not TLS connection - closing connection."); if (*probe->hub->config->tls_require_redirect_addr) { char buf[512]; ssize_t len = snprintf(buf, sizeof(buf), "ISUP " ADC_PROTO_SUPPORT "\nISID AAAB\nIINF NIRedirecting...\nIQUI AAAB RD%s\n", probe->hub->config->tls_require_redirect_addr); net_con_send(con, buf, (size_t) len); LOG_TRACE("Not TLS connection - Redirecting to %s.", probe->hub->config->tls_require_redirect_addr); } else { LOG_TRACE("Not TLS connection - closing connection."); } } else #endif if (user_create(probe->hub, probe->connection, &probe->addr)) { probe->connection = 0; } probe_destroy(probe); return; } else if ((memcmp(probe_recvbuf, "GET ", 4) == 0) || (memcmp(probe_recvbuf, "POST", 4) == 0) || (memcmp(probe_recvbuf, "HEAD", 4) == 0)) { /* Looks like HTTP - Not supported, but we log it. */ LOG_TRACE("Probed HTTP connection. Not supported closing connection (%s)", ip_convert_to_string(&probe->addr)); const char* buf = "501 Not implemented\r\n\r\n"; net_con_send(con, buf, strlen(buf)); } #ifdef SSL_SUPPORT else if (bytes >= 11 && probe_recvbuf[0] == 22 && probe_recvbuf[1] == 3 && /* protocol major version */ probe_recvbuf[5] == 1 && /* message type */ probe_recvbuf[9] == probe_recvbuf[1]) { if (probe->hub->config->tls_enable) { LOG_TRACE("Probed TLS %d.%d connection", (int) probe_recvbuf[1], (int) probe_recvbuf[2]); if (user_create(probe->hub, probe->connection, &probe->addr)) { probe->connection = 0; } net_con_ssl_handshake(con, net_con_ssl_mode_server, probe->hub->ctx); } else { LOG_TRACE("Probed TLS %d.%d connection. TLS disabled in hub.", (int) probe_recvbuf[9], (int) probe_recvbuf[10]); } } else { LOG_TRACE("Probed unsupported protocol: %x%x%x%x.", (int) probe_recvbuf[0], (int) probe_recvbuf[1], (int) probe_recvbuf[2], (int) probe_recvbuf[3]); } #endif probe_destroy(probe); return; } } }