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add ping support to MQTT project

    1: #include "global.h"
    2: #include "mqtt.h"
    3: #include "client.h"
    4: 
    5: 
    6: io_enableDEBUG;
    7: 
    8: extern char compiled[], compiledby[], compilehost[];
    9: 
   10: struct tagArgs *args;
   11: 
   12: 
   13: static void
   14: Usage(void)
   15: {
   16: 	printf(	" -= MQTT PING =- MQTT Ping from ELWIX\n"
   17: 		"=== %s@%s === Compiled: %s ===\n\n"
   18: 		" Syntax: mqtt_ping [options] <connect_to_broker[:port]> <ConnectID>\n\n"
   19: 		"\t-p <port>\t\tDifferent port for connect (default: 1883)\n"
   20: 		"\t-T <timeout>\t\tKeep alive timeout in seconds (default: 10sec)\n"
   21: 		"\t-U <username>\t\tUsername\n"
   22: 		"\t-P <password>\t\tPassword\n"
   23: 		"\t-v\t\t\tVerbose (more -vvv, more verbose)\n"
   24: 		"\t-h\t\t\tHelp! This screen\n\n", 
   25: 		compiledby, compilehost, compiled);
   26: }
   27: 
   28: static void
   29: cleanArgs(struct tagArgs * __restrict args)
   30: {
   31: 	mqtt_msgFree(&args->msg, 42);
   32: 	AIT_FREE_VAL(&args->User);
   33: 	AIT_FREE_VAL(&args->Pass);
   34: 	AIT_FREE_VAL(&args->ConnID);
   35: }
   36: 
   37: static int
   38: Ping(int sock)
   39: {
   40: 	int siz = 0;
   41: 	struct timeval before, after;
   42: 	ait_val_t val;
   43: 
   44: 	gettimeofday(&before, NULL);
   45: 
   46: 	siz = mqtt_msgPINGREQ(args->msg);
   47: 	if (siz == -1) {
   48: 		printf("Error:: msgPINGREQ #%d - %s\n", mqtt_GetErrno(), mqtt_GetError());
   49: 		return -1;
   50: 	}
   51: 	if (SendTo(sock, siz) == -1)
   52: 		return -1;
   53: 
   54: 	if ((siz = RecvFrom(sock)) == -1 || !siz)
   55: 		return -1;
   56: 	siz = mqtt_readPINGRESP(args->msg);
   57: 	if (siz == -1) {
   58: 		printf("Error:: readPINGRESP #%d - %s\n", mqtt_GetErrno(), mqtt_GetError());
   59: 		return -1;
   60: 	}
   61: 
   62: 	gettimeofday(&after, NULL);
   63: 
   64: 	printf("Ping MQTT broker %s ... %f sec.\n", io_n2addr(&args->addr, &val), 
   65: 			((after.tv_sec - before.tv_sec) + (after.tv_usec - before.tv_usec) / 1.e6));
   66: 	AIT_FREE_VAL(&val);
   67: 
   68: 	return 0;
   69: }
   70: 
   71: 
   72: int
   73: main(int argc, char **argv)
   74: {
   75: 	char ch;
   76: 	ait_val_t val;
   77: 	u_short port = atoi(MQTT_PORT);
   78: 	int sock, ret = 0;
   79: 
   80: 	if (!(args = malloc(sizeof(struct tagArgs)))) {
   81: 		printf("Error:: in alloc arguments #%d - %s\n", errno, strerror(errno));
   82: 		return 1;
   83: 	} else
   84: 		memset(args, 0, sizeof(struct tagArgs));
   85: 	args->free = cleanArgs;
   86: 
   87: 	if (!(args->msg = mqtt_msgAlloc(USHRT_MAX))) {
   88: 		printf("Error:: in mqtt buffer #%d - %s\n", mqtt_GetErrno(), mqtt_GetError());
   89: 		args->free(args);
   90: 		free(args);
   91: 		return 1;
   92: 	}
   93: 
   94: 	AIT_SET_STR(&args->ConnID, "");
   95: 	AIT_SET_STR(&args->User, "");
   96: 	AIT_SET_STR(&args->Pass, "");
   97: 
   98: 	args->ka = MQTT_KEEPALIVE;
   99: 	while ((ch = getopt(argc, argv, "T:U:P:p:vh")) != -1)
  100: 		switch (ch) {
  101: 			case 'T':
  102: 				args->ka = (u_short) strtol(optarg, NULL, 0);
  103: 				break;
  104: 			case 'U':
  105: 				AIT_FREE_VAL(&args->User);
  106: 				AIT_SET_STR(&args->User, optarg);
  107: 				break;
  108: 			case 'P':
  109: 				AIT_FREE_VAL(&args->Pass);
  110: 				AIT_SET_STR(&args->Pass, optarg);
  111: 				break;
  112: 			case 'p':
  113: 				port = (u_short) strtol(optarg, NULL, 0);
  114: 				break;
  115: 			case 'v':
  116: 				io_incDebug;
  117: 				break;
  118: 			case 'h':
  119: 			default:
  120: 				args->free(args);
  121: 				free(args);
  122: 				Usage();
  123: 				return 1;
  124: 		}
  125: 	argc -= optind;
  126: 	argv += optind;
  127: 	if (argc < 2) {
  128: 		printf("Error:: host for connect not found or connection id!\n\n");
  129: 		args->free(args);
  130: 		free(args);
  131: 		Usage();
  132: 		return 1;
  133: 	} else {
  134: 		AIT_FREE_VAL(&args->ConnID);
  135: 		AIT_SET_STR(&args->ConnID, argv[1]);
  136: 	}
  137: 	if (!io_gethostbyname(*argv, port, &args->addr)) {
  138: 		printf("Error:: host not valid #%d - %s\n", io_GetErrno(), io_GetError());
  139: 		args->free(args);
  140: 		free(args);
  141: 		Usage();
  142: 		return 1;
  143: 	}
  144: 	ioVERBOSE(1) printf("Connecting to %s:%d ...\n", io_n2addr(&args->addr, &val), io_n2port(&args->addr));
  145: 	AIT_FREE_VAL(&val);
  146: 
  147: 	if ((sock = InitClient()) == -1) {
  148: 		args->free(args);
  149: 		free(args);
  150: 		return 2;
  151: 	}
  152: 
  153: 	switch ((ret = ConnectClient(sock))) {
  154: 		case -1:
  155: 			printf(">> FAILED!\n");
  156: 			break;
  157: 		case MQTT_RETCODE_ACCEPTED:
  158: 			printf(">> OK\n");
  159: 			break;
  160: 		case MQTT_RETCODE_REFUSE_VER:
  161: 			printf(">> Incorrect version\n");
  162: 			break;
  163: 		case MQTT_RETCODE_REFUSE_ID:
  164: 			printf(">> Incorrect connectID\n");
  165: 			break;
  166: 		case MQTT_RETCODE_REFUSE_UNAVAIL:
  167: 			printf(">> Service unavailable\n");
  168: 			break;
  169: 		case MQTT_RETCODE_REFUSE_USERPASS:
  170: 			printf(">> Refuse user/pass\n");
  171: 			break;
  172: 		case MQTT_RETCODE_DENIED:
  173: 			printf(">> DENIED.\n");
  174: 			break;
  175: 	}
  176: 
  177: 	if (ret == MQTT_RETCODE_ACCEPTED) {
  178: 		ret = Ping(sock) ? 3 : 0;
  179: 		CloseClient(sock);
  180: 	} else {
  181: 		close(sock);
  182: 		ret = 4;
  183: 	}
  184: 
  185: 	args->free(args);
  186: 	free(args);
  187: 	return ret;
  188: }