/** * Terminate the socket module for both in an outbound communications */ void Socket_terminate() { #if !defined(SINGLE_LISTENER) ListElement* current = NULL; #if defined(USE_POLL) struct socket_info* si = NULL; #endif FUNC_ENTRY; while (ListNextElement(s.listeners, ¤t)) { Listener* listener = (Listener*)(current->content); Socket_close_only(listener->socket); #if defined(USE_POLL) if ((si = TreeRemoveKey(s.fds_tree, &listener->socket)) == NULL) Log(LOG_WARNING, 13, "Failed to remove socket %d", listener->socket); else free(si); #endif } #else FUNC_ENTRY; Socket_close_only(s.mySocket); #endif Socket_outTerminate(); FUNC_EXIT; }
/** * Close a socket and remove it from the select list. * @param socket the socket to close * @return completion code */ void Socket_close(int socket) { FUNC_ENTRY; Socket_close_only(socket); FD_CLR(socket, &(s.rset_saved)); if (FD_ISSET(socket, &(s.pending_wset))) FD_CLR(socket, &(s.pending_wset)); if (s.cur_clientsds != NULL && *(int*)(s.cur_clientsds->content) == socket) s.cur_clientsds = s.cur_clientsds->next; ListRemoveItem(s.connect_pending, &socket, intcompare); ListRemoveItem(s.write_pending, &socket, intcompare); SocketBuffer_cleanup(socket); if (ListRemoveItem(s.clientsds, &socket, intcompare)) Log(TRACE_MIN, -1, "Removed socket %d", socket); else Log(TRACE_MIN, -1, "Failed to remove socket %d", socket); if (socket + 1 >= s.maxfdp1) { /* now we have to reset s.maxfdp1 */ ListElement* cur_clientsds = NULL; s.maxfdp1 = 0; while (ListNextElement(s.clientsds, &cur_clientsds)) s.maxfdp1 = max(*((int*)(cur_clientsds->content)), s.maxfdp1); ++(s.maxfdp1); Log(TRACE_MAX, -1, "Reset max fdp1 to %d", s.maxfdp1); } FUNC_EXIT; }
/** * Close any active session for a client and clean up. * @param client the client to clean up * @param send_will flag to indicate whether a will messsage should be sent if it has been set */ void MQTTProtocol_closeSession(Clients* client, int send_will) { FUNC_ENTRY; client->good = 0; if (in_MQTTPacket_Factory == client->socket || client->closing) goto exit; client->closing = 1; if (client->socket > 0) { if (client->connected) { if (client->outbound && client->will) { Publish pub; pub.payload = "0"; pub.payloadlen = 1; pub.topic = client->will->topic; #if defined(MQTTS) if (client->protocol == PROTOCOL_MQTTS) MQTTSProtocol_startPublishCommon(client, &pub, 0,0,1); if (client->protocol == PROTOCOL_MQTTS_DTLS) MQTTSProtocol_startPublishCommon(client, &pub, 0,0,1); //TODO LW else #endif MQTTPacket_send_publish(&pub, 0, 0, 1, client->socket, client->clientID); MQTTProtocol_sys_publish(client->will->topic, "0"); } #if defined(MQTTS) if (client->protocol == PROTOCOL_MQTTS_MULTICAST) ; else if (client->protocol == PROTOCOL_MQTTS) MQTTSPacket_send_disconnect(client, 0); else if (client->protocol == PROTOCOL_MQTTS_DTLS) MQTTSPacket_send_disconnect(client, 0); else #endif if (client->outbound) MQTTPacket_send_disconnect(client->socket, client->clientID); } if (ListFindItem(&(state.pending_writes), &(client->socket), intcompare)) { pending_write* pw = (pending_write*)(state.pending_writes.current->content); MQTTProtocol_removePublication(pw->p); ListRemove(&(state.pending_writes), pw); } #if defined(MQTTS) if (client->protocol == PROTOCOL_MQTT || client->outbound == 1) { if (client->protocol == PROTOCOL_MQTTS_MULTICAST) Socket_close_only(client->socket); else #endif Socket_close(client->socket); #if defined(MQTTS) } #endif } if (client->connected || client->connect_state) { client->connected = 0; client->connect_state = 0; } if (client->outbound == 0 && client->will != NULL && send_will) { Publish publish; publish.payload = client->will->msg; publish.payloadlen = strlen(client->will->msg); publish.topic = client->will->topic; publish.header.bits.qos = client->will->qos; publish.header.bits.retain = client->will->retained; Protocol_processPublication(&publish, client->clientID); } #if defined(MQTTS) if (client->protocol == PROTOCOL_MQTTS) MQTTSProtocol_emptyRegistrationList(client->registrations); else if (client->protocol == PROTOCOL_MQTTS_DTLS) MQTTSProtocol_emptyRegistrationList(client->registrations); #endif if (client->cleansession) { if (client->outbound && ((BridgeConnections*)(client->bridge_context))->state != CONNECTION_DELETE) { /* bridge outbound client structures are reused on reconnection */ int i; MQTTProtocol_removeAllSubscriptions(client->clientID); MQTTProtocol_emptyMessageList(client->inboundMsgs); MQTTProtocol_emptyMessageList(client->outboundMsgs); for (i = 0; i < PRIORITY_MAX; ++i) MQTTProtocol_emptyMessageList(client->queuedMsgs[i]); client->msgID = 0; } else { #if defined(MQTTS) if ((client->protocol == PROTOCOL_MQTTS && client->outbound == 0) || (client->protocol == PROTOCOL_MQTTS_DTLS && client->outbound == 0) || client->protocol == PROTOCOL_MQTTS_MULTICAST) { if (!TreeRemove(bstate->mqtts_clients, client) && !TreeRemove(bstate->disconnected_mqtts_clients, client)) Log(LOG_ERROR, 39, NULL); else Log(TRACE_MAX, 2, NULL, client->clientID, client->socket); } else { #endif if (!TreeRemove(bstate->clients, client) && !TreeRemove(bstate->disconnected_clients, client)) Log(LOG_ERROR, 39, NULL); else Log(TRACE_MAX, 2, NULL, client->clientID, client->socket); #if defined(MQTTS) } #endif MQTTProtocol_freeClient(client); } } else { int i; for (i = 0; i < PRIORITY_MAX; ++i) MQTTProtocol_removeQoS0Messages(client->queuedMsgs[i]); #if defined(MQTTS) if ((client->protocol == PROTOCOL_MQTTS && client->outbound == 0)||(client->protocol == PROTOCOL_MQTTS_DTLS && client->outbound == 0)) { if (TreeRemove(bstate->mqtts_clients, client)) { client->socket = 0; TreeAdd(bstate->disconnected_mqtts_clients, client, sizeof(Clients) + strlen(client->clientID)+1 + 3*sizeof(List)); } } else { #endif if (TreeRemove(bstate->clients, client)) { client->socket = 0; TreeAdd(bstate->disconnected_clients, client, sizeof(Clients) + strlen(client->clientID)+1 + 3*sizeof(List)); } #if defined(MQTTS) } #endif client->closing = 0; } exit: FUNC_EXIT; }