int main(int argc, char* argv[]) { int sock; // Parse the command-line options parse_opts(argc, argv); // Enable debugging? mqtt_sn_set_debug(debug); // Create a UDP socket sock = mqtt_sn_create_socket(mqtt_sn_host, mqtt_sn_port); if (sock) { // Connect to gateway if (qos >= 0) { if (qos==0) { mqtt_sn_send_connect(sock, client_id, MQTT_SN_FLAG_CLEAN, keep_alive); mqtt_sn_receive_connack(sock); } else if (qos==1) { mqtt_sn_send_connect(sock, client_id, MQTT_SN_FLAG_CLEAN | MQTT_SN_FLAG_WILL , keep_alive); connack_packet_t *p= mqtt_sn_receive_packet(sock); if ( p!= NULL && p->type==MQTT_SN_TYPE_WILLTOPICREQ) { mqtt_sn_send_will_topic(sock, t_topic_name, MQTT_SN_FLAG_QOS_1 | MQTT_SN_FLAG_RETAIN); p= mqtt_sn_receive_packet(sock); if ( p!= NULL && p->type==MQTT_SN_TYPE_WILLMSGREQ) { mqtt_sn_send_will_msg(sock, t_message_data); } else { fprintf(stderr,"Error: did not get MQTT_SN_TYPE_WILLMSGREQ.\n"); exit(-1); } } else { fprintf(stderr,"Error: did not get MQTT_SN_TYPE_WILLTOPICREQ.\n"); exit(-1); } mqtt_sn_receive_connack(sock); } } if (topic_id) { // Use pre-defined topic ID topic_id_type = MQTT_SN_TOPIC_TYPE_PREDEFINED; } else if (strlen(topic_name) == 2) { // Convert the 2 character topic name into a 2 byte topic id topic_id = (topic_name[0] << 8) + topic_name[1]; topic_id_type = MQTT_SN_TOPIC_TYPE_SHORT; } else if (qos >= 0) { // Register the topic name mqtt_sn_send_register(sock, topic_name); topic_id = mqtt_sn_receive_regack(sock); topic_id_type = MQTT_SN_TOPIC_TYPE_NORMAL; } // Publish to the topic mqtt_sn_send_publish(sock, topic_id, topic_id_type, message_data, qos, retain); if (qos==1) { int retries=0; while (1) { connack_packet_t *p= mqtt_sn_receive_packet(sock); if ( p!= NULL && p->type==MQTT_SN_TYPE_PUBACK) { break; } else fprintf(stderr,"Warn: QoS 1 and send not acked -- retrying.. (%d/10)\n",retries); if (retries++>10) { fprintf(stderr,"Error: QoS 1 and send not acked, tried %d times\n",retries); exit(-1); } sleep(1); mqtt_sn_send_publish(sock, topic_id, topic_id_type, message_data, qos, retain); } if (retries) fprintf(stderr,"Warn: Send required %d times, but was successful.\n",retries); } // Finally, disconnect if (qos >= 0) { mqtt_sn_send_disconnect(sock); connack_packet_t *p= mqtt_sn_receive_packet(sock); if ( p!= NULL && p->type==MQTT_SN_TYPE_DISCONNECT) { // disconnect acked ok } else fprintf(stderr,"Warn: QoS >=0 and DISCONNECT not acked\n"); } close(sock); } mqtt_sn_cleanup(); return 0; }
int main(int argc, char* argv[]) { int sock; // Parse the command-line options parse_opts(argc, argv); int i=1; //Variables for time taking struct timeval start, end; // FILE *fp; // Create a UDP socket sock = mqtt_sn_create_socket(mqtt_sn_host, mqtt_sn_port); if (sock) { // Connect to gateway if (qos >= 0) { mqtt_sn_send_connect(sock, client_id, keep_alive); mqtt_sn_receive_connack(sock); } if (topic_id) { // Use pre-defined topic ID topic_id_type = MQTT_SN_TOPIC_TYPE_PREDEFINED; } else if (strlen(topic_name) == 2) { // Convert the 2 character topic name into a 2 byte topic id topic_id = (topic_name[0] << 8) + topic_name[1]; topic_id_type = MQTT_SN_TOPIC_TYPE_SHORT; } else if (qos >= 0) { // Register the topic name mqtt_sn_send_register(sock, topic_name); topic_id = mqtt_sn_receive_regack(sock); topic_id_type = MQTT_SN_TOPIC_TYPE_NORMAL; } // gettimeofday(&start, NULL); while(i<=1000) { gettimeofday(&start, NULL); // Publish to the topic if (qos == 0){ mqtt_sn_send_publish(sock, topic_id, topic_id_type, message_data, qos, retain); } // Manage Return Packets and Retrasnmits - harith if (qos >= 1){ mqtt_sn_send_publish(sock, topic_id, topic_id_type, message_data, qos, retain); if (qos == 1){ struct timeval tv; fd_set rfd; int ret; int resend = 0; while (resend < 5){ FD_ZERO(&rfd); FD_SET(sock, &rfd); tv.tv_sec = 1; tv.tv_usec = 0; ret = select(FD_SETSIZE, &rfd, NULL, NULL, &tv); if (ret < 0) { printf("Select() Error!\n" ); exit(EXIT_FAILURE); } else if (ret > 0) { // Receive a packet mqtt_sn_receive_puback(sock); resend = 6; } else if (ret == 0) { printf("republishing...\n"); mqtt_sn_send_publish(sock, topic_id, topic_id_type, message_data, qos, retain); resend++; } } } //QOS=2 else if(qos==2){ struct timeval tv; fd_set rfd; int ret; int resendpublish = 0; int resendpubrel = 0; while (resendpublish < 5){ FD_ZERO(&rfd); FD_SET(sock, &rfd); tv.tv_sec = 1; tv.tv_usec = 0; ret = select(FD_SETSIZE, &rfd, NULL, NULL, &tv); if (ret < 0) { printf("Select() Error!\n" ); exit(EXIT_FAILURE); } else if (ret > 0) { // Receive a packet mqtt_sn_receive_pubrec(sock); resendpublish = 6; mqtt_sn_send_pubrel(sock); } else if (ret == 0) { printf("republishing qos21...\n"); mqtt_sn_send_publish(sock, topic_id, topic_id_type, message_data, qos, retain); resendpublish++; } } //retransmit pubrel while (resendpubrel < 5){ FD_ZERO(&rfd); FD_SET(sock, &rfd); tv.tv_sec = 1; tv.tv_usec = 0; ret = select(FD_SETSIZE, &rfd, NULL, NULL, &tv); if (ret < 0) { printf("Select() Error!\n" ); exit(EXIT_FAILURE); } else if (ret > 0) { // Receive a packet mqtt_sn_receive_pubcomp(sock); resendpubrel = 6; } else if (ret == 0) { printf("republishing qos22...\n"); mqtt_sn_send_pubrel(sock); resendpubrel++; } } } } gettimeofday(&end, NULL); // int taken = (int)((end.tv_sec * 1000000 + end.tv_usec) - (start.tv_sec * 1000000 + start.tv_usec))/1000000; float taken = (float)((end.tv_sec * 1000000 + end.tv_usec) - (start.tv_sec * 1000000 + start.tv_usec))/1000; printf("Time taken is:%3.2f ms\n\n",taken); //open file for writing // fp = fopen( "logfile.csv", "a" ); // Open file for writing // fprintf(fp, "Seq %d , %3.2fms, ",i,taken); // fprintf(fp,"Time %s\r\n",ctime((const time_t *) &end.tv_sec)); // fclose(fp); // printf("Time taken is:%3.2d s\n\n", (int)((end.tv_sec * 1000000 + end.tv_usec) // - (start.tv_sec * 1000000 + start.tv_usec))/1000000); sleep(.5); i++; // if(taken>=2){ // printf("%d messages sent.\n", i); // exit(EXIT_SUCCESS); // } } if (qos >= 0) { mqtt_sn_send_disconnect(sock); mqtt_sn_receive_disconnect(sock); } close(sock); } mqtt_sn_cleanup(); return 0; }