/client/pub_client.c
C | 696 lines | 633 code | 33 blank | 30 comment | 174 complexity | dc541952a440e9667e705a48f1de850a MD5 | raw file
Possible License(s): LGPL-2.1, BSD-3-Clause
- /*
- Copyright (c) 2009-2012 Roger Light <roger@atchoo.org>
- All rights reserved.
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are met:
- 1. Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
- 2. Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
- 3. Neither the name of mosquitto nor the names of its
- contributors may be used to endorse or promote products derived from
- this software without specific prior written permission.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- POSSIBILITY OF SUCH DAMAGE.
- */
- #include <errno.h>
- #include <fcntl.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #ifndef WIN32
- #include <unistd.h>
- #else
- #include <process.h>
- #include <winsock2.h>
- #define snprintf sprintf_s
- #endif
- #include <mosquitto.h>
- #define MSGMODE_NONE 0
- #define MSGMODE_CMD 1
- #define MSGMODE_STDIN_LINE 2
- #define MSGMODE_STDIN_FILE 3
- #define MSGMODE_FILE 4
- #define MSGMODE_NULL 5
- #define STATUS_CONNECTING 0
- #define STATUS_CONNACK_RECVD 1
- /* Global variables for use in callbacks. See sub_client.c for an example of
- * using a struct to hold variables for use in callbacks. */
- static char *topic = NULL;
- static char *message = NULL;
- static long msglen = 0;
- static int qos = 0;
- static int retain = 0;
- static int mode = MSGMODE_NONE;
- static int status = STATUS_CONNECTING;
- static int mid_sent = 0;
- static bool connected = true;
- static char *username = NULL;
- static char *password = NULL;
- static bool disconnect_sent = false;
- static bool quiet = false;
- void my_connect_callback(struct mosquitto *mosq, void *obj, int result)
- {
- int rc = MOSQ_ERR_SUCCESS;
- if(!result){
- switch(mode){
- case MSGMODE_CMD:
- case MSGMODE_FILE:
- case MSGMODE_STDIN_FILE:
- rc = mosquitto_publish(mosq, &mid_sent, topic, msglen, message, qos, retain);
- break;
- case MSGMODE_NULL:
- rc = mosquitto_publish(mosq, &mid_sent, topic, 0, NULL, qos, retain);
- break;
- case MSGMODE_STDIN_LINE:
- status = STATUS_CONNACK_RECVD;
- break;
- }
- if(rc){
- if(!quiet){
- switch(rc){
- case MOSQ_ERR_INVAL:
- fprintf(stderr, "Error: Invalid input. Does your topic contain '+' or '#'?\n");
- break;
- case MOSQ_ERR_NOMEM:
- fprintf(stderr, "Error: Out of memory when trying to publish message.\n");
- break;
- case MOSQ_ERR_NO_CONN:
- fprintf(stderr, "Error: Client not connected when trying to publish.\n");
- break;
- case MOSQ_ERR_PROTOCOL:
- fprintf(stderr, "Error: Protocol error when communicating with broker.\n");
- break;
- case MOSQ_ERR_PAYLOAD_SIZE:
- fprintf(stderr, "Error: Message payload is too large.\n");
- break;
- }
- }
- mosquitto_disconnect(mosq);
- }
- }else{
- if(result && !quiet){
- fprintf(stderr, "%s\n", mosquitto_connack_string(result));
- }
- }
- }
- void my_disconnect_callback(struct mosquitto *mosq, void *obj, int rc)
- {
- connected = false;
- }
- void my_publish_callback(struct mosquitto *mosq, void *obj, int mid)
- {
- if(mode != MSGMODE_STDIN_LINE && disconnect_sent == false){
- mosquitto_disconnect(mosq);
- disconnect_sent = true;
- }
- }
- void my_log_callback(struct mosquitto *mosq, void *obj, int level, const char *str)
- {
- printf("%s\n", str);
- }
- int load_stdin(void)
- {
- long pos = 0, rlen;
- char buf[1024];
- mode = MSGMODE_STDIN_FILE;
- while(!feof(stdin)){
- rlen = fread(buf, 1, 1024, stdin);
- message = realloc(message, pos+rlen);
- if(!message){
- if(!quiet) fprintf(stderr, "Error: Out of memory.\n");
- return 1;
- }
- memcpy(&(message[pos]), buf, rlen);
- pos += rlen;
- }
- msglen = pos;
- if(!msglen){
- if(!quiet) fprintf(stderr, "Error: Zero length input.\n");
- return 1;
- }
- return 0;
- }
- int load_file(const char *filename)
- {
- long pos, rlen;
- FILE *fptr = NULL;
- fptr = fopen(filename, "rb");
- if(!fptr){
- if(!quiet) fprintf(stderr, "Error: Unable to open file \"%s\".\n", filename);
- return 1;
- }
- mode = MSGMODE_FILE;
- fseek(fptr, 0, SEEK_END);
- msglen = ftell(fptr);
- if(msglen > 268435455){
- fclose(fptr);
- if(!quiet) fprintf(stderr, "Error: File \"%s\" is too large (>268,435,455 bytes).\n", filename);
- return 1;
- }
- if(msglen == 0){
- fclose(fptr);
- if(!quiet) fprintf(stderr, "Error: File \"%s\" is empty.\n", filename);
- return 1;
- }
- fseek(fptr, 0, SEEK_SET);
- message = malloc(msglen);
- if(!message){
- fclose(fptr);
- if(!quiet) fprintf(stderr, "Error: Out of memory.\n");
- return 1;
- }
- pos = 0;
- while(pos < msglen){
- rlen = fread(&(message[pos]), sizeof(char), msglen-pos, fptr);
- pos += rlen;
- }
- fclose(fptr);
- return 0;
- }
- void print_usage(void)
- {
- printf("mosquitto_pub is a simple mqtt client that will publish a message on a single topic and exit.\n\n");
- printf("Usage: mosquitto_pub [-h host] [-p port] [-q qos] [-r] {-f file | -l | -n | -m message} -t topic\n");
- printf(" [-i id] [-I id_prefix]\n");
- printf(" [-d] [--quiet]\n");
- printf(" [-u username [-P password]]\n");
- printf(" [--will-topic [--will-payload payload] [--will-qos qos] [--will-retain]]\n");
- #ifdef WITH_TLS
- printf(" [{--cafile file | --capath dir} [--cert file] [--key file]]\n");
- #ifdef WITH_TLS_PSK
- printf(" [--psk hex-key --psk-identity identity]\n");
- #endif
- #endif
- printf(" mosquitto_pub --help\n\n");
- printf(" -d : enable debug messages.\n");
- printf(" -f : send the contents of a file as the message.\n");
- printf(" -h : mqtt host to connect to. Defaults to localhost.\n");
- printf(" -i : id to use for this client. Defaults to mosquitto_pub_ appended with the process id.\n");
- printf(" -I : define the client id as id_prefix appended with the process id. Useful for when the\n");
- printf(" broker is using the clientid_prefixes option.\n");
- printf(" -l : read messages from stdin, sending a separate message for each line.\n");
- printf(" -m : message payload to send.\n");
- printf(" -n : send a null (zero length) message.\n");
- printf(" -p : network port to connect to. Defaults to 1883.\n");
- printf(" -q : quality of service level to use for all messages. Defaults to 0.\n");
- printf(" -r : message should be retained.\n");
- printf(" -s : read message from stdin, sending the entire input as a message.\n");
- printf(" -t : mqtt topic to publish to.\n");
- printf(" -u : provide a username (requires MQTT 3.1 broker)\n");
- printf(" -P : provide a password (requires MQTT 3.1 broker)\n");
- printf(" --help : display this message.\n");
- printf(" --quiet : don't print error messages.\n");
- printf(" --will-payload : payload for the client Will, which is sent by the broker in case of\n");
- printf(" unexpected disconnection. If not given and will-topic is set, a zero\n");
- printf(" length message will be sent.\n");
- printf(" --will-qos : QoS level for the client Will.\n");
- printf(" --will-retain : if given, make the client Will retained.\n");
- printf(" --will-topic : the topic on which to publish the client Will.\n");
- #ifdef WITH_TLS
- printf(" --cafile : path to a file containing trusted CA certificates to enable encrypted\n");
- printf(" communication.\n");
- printf(" --capath : path to a directory containing trusted CA certificates to enable encrypted\n");
- printf(" communication.\n");
- printf(" --cert : client certificate for authentication, if required by server.\n");
- printf(" --key : client private key for authentication, if required by server.\n");
- #ifdef WITH_TLS_PSK
- printf(" --psk : pre-shared-key in hexadecimal (no leading 0x) to enable TLS-PSK mode.\n");
- printf(" --psk-identity : client identity string for TLS-PSK mode.\n");
- #endif
- #endif
- printf("\nSee http://mosquitto.org/ for more information.\n\n");
- }
- int main(int argc, char *argv[])
- {
- char *id = NULL;
- char *id_prefix = NULL;
- int i;
- char *host = "localhost";
- int port = 1883;
- int keepalive = 60;
- #ifndef WIN32
- int opt;
- #endif
- char buf[1024];
- bool debug = false;
- struct mosquitto *mosq = NULL;
- int rc;
- int rc2;
- char hostname[256];
- char err[1024];
- int len;
- char *will_payload = NULL;
- long will_payloadlen = 0;
- int will_qos = 0;
- bool will_retain = false;
- char *will_topic = NULL;
- char *cafile = NULL;
- char *capath = NULL;
- char *certfile = NULL;
- char *keyfile = NULL;
- char *psk = NULL;
- char *psk_identity = NULL;
- for(i=1; i<argc; i++){
- if(!strcmp(argv[i], "-p") || !strcmp(argv[i], "--port")){
- if(i==argc-1){
- fprintf(stderr, "Error: -p argument given but no port specified.\n\n");
- print_usage();
- return 1;
- }else{
- port = atoi(argv[i+1]);
- if(port<1 || port>65535){
- fprintf(stderr, "Error: Invalid port given: %d\n", port);
- print_usage();
- return 1;
- }
- }
- i++;
- }else if(!strcmp(argv[i], "--cafile")){
- if(i==argc-1){
- fprintf(stderr, "Error: --cafile argument given but no file specified.\n\n");
- print_usage();
- return 1;
- }else{
- cafile = argv[i+1];
- }
- i++;
- }else if(!strcmp(argv[i], "--capath")){
- if(i==argc-1){
- fprintf(stderr, "Error: --capath argument given but no directory specified.\n\n");
- print_usage();
- return 1;
- }else{
- capath = argv[i+1];
- }
- i++;
- }else if(!strcmp(argv[i], "--cert")){
- if(i==argc-1){
- fprintf(stderr, "Error: --cert argument given but no file specified.\n\n");
- print_usage();
- return 1;
- }else{
- certfile = argv[i+1];
- }
- i++;
- }else if(!strcmp(argv[i], "-d") || !strcmp(argv[i], "--debug")){
- debug = true;
- }else if(!strcmp(argv[i], "-f") || !strcmp(argv[i], "--file")){
- if(mode != MSGMODE_NONE){
- fprintf(stderr, "Error: Only one type of message can be sent at once.\n\n");
- print_usage();
- return 1;
- }else if(i==argc-1){
- fprintf(stderr, "Error: -f argument given but no file specified.\n\n");
- print_usage();
- return 1;
- }else{
- if(load_file(argv[i+1])) return 1;
- }
- i++;
- }else if(!strcmp(argv[i], "--help")){
- print_usage();
- return 0;
- }else if(!strcmp(argv[i], "-h") || !strcmp(argv[i], "--host")){
- if(i==argc-1){
- fprintf(stderr, "Error: -h argument given but no host specified.\n\n");
- print_usage();
- return 1;
- }else{
- host = argv[i+1];
- }
- i++;
- }else if(!strcmp(argv[i], "-i") || !strcmp(argv[i], "--id")){
- if(id_prefix){
- fprintf(stderr, "Error: -i and -I argument cannot be used together.\n\n");
- print_usage();
- return 1;
- }
- if(i==argc-1){
- fprintf(stderr, "Error: -i argument given but no id specified.\n\n");
- print_usage();
- return 1;
- }else{
- id = argv[i+1];
- }
- i++;
- }else if(!strcmp(argv[i], "-I") || !strcmp(argv[i], "--id-prefix")){
- if(id){
- fprintf(stderr, "Error: -i and -I argument cannot be used together.\n\n");
- print_usage();
- return 1;
- }
- if(i==argc-1){
- fprintf(stderr, "Error: -I argument given but no id prefix specified.\n\n");
- print_usage();
- return 1;
- }else{
- id_prefix = argv[i+1];
- }
- i++;
- }else if(!strcmp(argv[i], "--key")){
- if(i==argc-1){
- fprintf(stderr, "Error: --key argument given but no file specified.\n\n");
- print_usage();
- return 1;
- }else{
- keyfile = argv[i+1];
- }
- i++;
- }else if(!strcmp(argv[i], "-l") || !strcmp(argv[i], "--stdin-line")){
- if(mode != MSGMODE_NONE){
- fprintf(stderr, "Error: Only one type of message can be sent at once.\n\n");
- print_usage();
- return 1;
- }else{
- mode = MSGMODE_STDIN_LINE;
- #ifndef WIN32
- opt = fcntl(fileno(stdin), F_GETFL, 0);
- if(opt == -1 || fcntl(fileno(stdin), F_SETFL, opt | O_NONBLOCK) == -1){
- fprintf(stderr, "Error: Unable to set stdin to non-blocking.\n");
- return 1;
- }
- #endif
- }
- }else if(!strcmp(argv[i], "-m") || !strcmp(argv[i], "--message")){
- if(mode != MSGMODE_NONE){
- fprintf(stderr, "Error: Only one type of message can be sent at once.\n\n");
- print_usage();
- return 1;
- }else if(i==argc-1){
- fprintf(stderr, "Error: -m argument given but no message specified.\n\n");
- print_usage();
- return 1;
- }else{
- message = argv[i+1];
- msglen = strlen(message);
- mode = MSGMODE_CMD;
- }
- i++;
- }else if(!strcmp(argv[i], "-n") || !strcmp(argv[i], "--null-message")){
- if(mode != MSGMODE_NONE){
- fprintf(stderr, "Error: Only one type of message can be sent at once.\n\n");
- print_usage();
- return 1;
- }else{
- mode = MSGMODE_NULL;
- }
- }else if(!strcmp(argv[i], "--psk")){
- if(i==argc-1){
- fprintf(stderr, "Error: --psk argument given but no key specified.\n\n");
- print_usage();
- return 1;
- }else{
- psk = argv[i+1];
- }
- i++;
- }else if(!strcmp(argv[i], "--psk-identity")){
- if(i==argc-1){
- fprintf(stderr, "Error: --psk-identity argument given but no identity specified.\n\n");
- print_usage();
- return 1;
- }else{
- psk_identity = argv[i+1];
- }
- i++;
- }else if(!strcmp(argv[i], "-q") || !strcmp(argv[i], "--qos")){
- if(i==argc-1){
- fprintf(stderr, "Error: -q argument given but no QoS specified.\n\n");
- print_usage();
- return 1;
- }else{
- qos = atoi(argv[i+1]);
- if(qos<0 || qos>2){
- fprintf(stderr, "Error: Invalid QoS given: %d\n", qos);
- print_usage();
- return 1;
- }
- }
- i++;
- }else if(!strcmp(argv[i], "--quiet")){
- quiet = true;
- }else if(!strcmp(argv[i], "-r") || !strcmp(argv[i], "--retain")){
- retain = 1;
- }else if(!strcmp(argv[i], "-s") || !strcmp(argv[i], "--stdin-file")){
- if(mode != MSGMODE_NONE){
- fprintf(stderr, "Error: Only one type of message can be sent at once.\n\n");
- print_usage();
- return 1;
- }else{
- if(load_stdin()) return 1;
- }
- }else if(!strcmp(argv[i], "-t") || !strcmp(argv[i], "--topic")){
- if(i==argc-1){
- fprintf(stderr, "Error: -t argument given but no topic specified.\n\n");
- print_usage();
- return 1;
- }else{
- topic = argv[i+1];
- }
- i++;
- }else if(!strcmp(argv[i], "-u") || !strcmp(argv[i], "--username")){
- if(i==argc-1){
- fprintf(stderr, "Error: -u argument given but no username specified.\n\n");
- print_usage();
- return 1;
- }else{
- username = argv[i+1];
- }
- i++;
- }else if(!strcmp(argv[i], "-P") || !strcmp(argv[i], "--pw")){
- if(i==argc-1){
- fprintf(stderr, "Error: -P argument given but no password specified.\n\n");
- print_usage();
- return 1;
- }else{
- password = argv[i+1];
- }
- i++;
- }else if(!strcmp(argv[i], "--will-payload")){
- if(i==argc-1){
- fprintf(stderr, "Error: --will-payload argument given but no will payload specified.\n\n");
- print_usage();
- return 1;
- }else{
- will_payload = argv[i+1];
- will_payloadlen = strlen(will_payload);
- }
- i++;
- }else if(!strcmp(argv[i], "--will-qos")){
- if(i==argc-1){
- fprintf(stderr, "Error: --will-qos argument given but no will QoS specified.\n\n");
- print_usage();
- return 1;
- }else{
- will_qos = atoi(argv[i+1]);
- if(will_qos < 0 || will_qos > 2){
- fprintf(stderr, "Error: Invalid will QoS %d.\n\n", will_qos);
- return 1;
- }
- }
- i++;
- }else if(!strcmp(argv[i], "--will-retain")){
- will_retain = true;
- }else if(!strcmp(argv[i], "--will-topic")){
- if(i==argc-1){
- fprintf(stderr, "Error: --will-topic argument given but no will topic specified.\n\n");
- print_usage();
- return 1;
- }else{
- will_topic = argv[i+1];
- }
- i++;
- }else{
- fprintf(stderr, "Error: Unknown option '%s'.\n",argv[i]);
- print_usage();
- return 1;
- }
- }
- if(!topic || mode == MSGMODE_NONE){
- fprintf(stderr, "Error: Both topic and message must be supplied.\n");
- print_usage();
- return 1;
- }
- if(will_payload && !will_topic){
- fprintf(stderr, "Error: Will payload given, but no will topic given.\n");
- print_usage();
- return 1;
- }
- if(will_retain && !will_topic){
- fprintf(stderr, "Error: Will retain given, but no will topic given.\n");
- print_usage();
- return 1;
- }
- if(password && !username){
- if(!quiet) fprintf(stderr, "Warning: Not using password since username not set.\n");
- }
- if((certfile && !keyfile) || (keyfile && !certfile)){
- fprintf(stderr, "Error: Both certfile and keyfile must be provided if one of them is.\n");
- print_usage();
- return 1;
- }
- if((cafile || capath) && psk){
- if(!quiet) fprintf(stderr, "Error: Only one of --psk or --cafile/--capath may be used at once.\n");
- return 1;
- }
- if(psk && !psk_identity){
- if(!quiet) fprintf(stderr, "Error: --psk-identity required if --psk used.\n");
- return 1;
- }
- mosquitto_lib_init();
- if(id_prefix){
- id = malloc(strlen(id_prefix)+10);
- if(!id){
- if(!quiet) fprintf(stderr, "Error: Out of memory.\n");
- mosquitto_lib_cleanup();
- return 1;
- }
- snprintf(id, strlen(id_prefix)+10, "%s%d", id_prefix, getpid());
- }else if(!id){
- hostname[0] = '\0';
- gethostname(hostname, 256);
- hostname[255] = '\0';
- len = strlen("mosqpub/-") + 6 + strlen(hostname);
- id = malloc(len);
- if(!id){
- if(!quiet) fprintf(stderr, "Error: Out of memory.\n");
- mosquitto_lib_cleanup();
- return 1;
- }
- snprintf(id, len, "mosqpub/%d-%s", getpid(), hostname);
- id[MOSQ_MQTT_ID_MAX_LENGTH] = '\0';
- snprintf(id, MOSQ_MQTT_ID_MAX_LENGTH, "mosqpub/%d-%s", getpid(), hostname);
- id[MOSQ_MQTT_ID_MAX_LENGTH] = '\0';
- }
- mosq = mosquitto_new(id, true, NULL);
- if(!mosq){
- switch(errno){
- case ENOMEM:
- if(!quiet) fprintf(stderr, "Error: Out of memory.\n");
- break;
- case EINVAL:
- if(!quiet) fprintf(stderr, "Error: Invalid id.\n");
- break;
- }
- mosquitto_lib_cleanup();
- return 1;
- }
- if(debug){
- mosquitto_log_callback_set(mosq, my_log_callback);
- }
- if(will_topic && mosquitto_will_set(mosq, will_topic, will_payloadlen, will_payload, will_qos, will_retain)){
- if(!quiet) fprintf(stderr, "Error: Problem setting will.\n");
- mosquitto_lib_cleanup();
- return 1;
- }
- if(username && mosquitto_username_pw_set(mosq, username, password)){
- if(!quiet) fprintf(stderr, "Error: Problem setting username and password.\n");
- mosquitto_lib_cleanup();
- return 1;
- }
- if((cafile || capath) && mosquitto_tls_set(mosq, cafile, capath, certfile, keyfile, NULL)){
- if(!quiet) fprintf(stderr, "Error: Problem setting TLS options.\n");
- mosquitto_lib_cleanup();
- return 1;
- }
- if(psk && mosquitto_tls_psk_set(mosq, psk, psk_identity, NULL)){
- if(!quiet) fprintf(stderr, "Error: Problem setting TLS-PSK options.\n");
- mosquitto_lib_cleanup();
- return 1;
- }
- mosquitto_connect_callback_set(mosq, my_connect_callback);
- mosquitto_disconnect_callback_set(mosq, my_disconnect_callback);
- mosquitto_publish_callback_set(mosq, my_publish_callback);
- rc = mosquitto_connect(mosq, host, port, keepalive);
- if(rc){
- if(!quiet){
- if(rc == MOSQ_ERR_ERRNO){
- #ifndef WIN32
- strerror_r(errno, err, 1024);
- #else
- FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, errno, 0, (LPTSTR)&err, 1024, NULL);
- #endif
- fprintf(stderr, "Error: %s\n", err);
- }else{
- fprintf(stderr, "Unable to connect (%d).\n", rc);
- }
- }
- mosquitto_lib_cleanup();
- return rc;
- }
- do{
- if(mode == MSGMODE_STDIN_LINE && status == STATUS_CONNACK_RECVD){
- if(fgets(buf, 1024, stdin)){
- buf[strlen(buf)-1] = '\0';
- rc2 = mosquitto_publish(mosq, &mid_sent, topic, strlen(buf), buf, qos, retain);
- if(rc2){
- if(!quiet) fprintf(stderr, "Error: Publish returned %d, disconnecting.\n", rc2);
- mosquitto_disconnect(mosq);
- }
- }else if(feof(stdin) && disconnect_sent == false){
- mosquitto_disconnect(mosq);
- disconnect_sent = true;
- }
- }
- rc = mosquitto_loop(mosq, -1, 1);
- }while(rc == MOSQ_ERR_SUCCESS && connected);
- if(message && mode == MSGMODE_FILE){
- free(message);
- }
- mosquitto_destroy(mosq);
- mosquitto_lib_cleanup();
- if(rc){
- if(rc == MOSQ_ERR_ERRNO){
- fprintf(stderr, "Error: %s\n", strerror(errno));
- }else{
- fprintf(stderr, "Error: %s\n", mosquitto_strerror(rc));
- }
- }
- return rc;
- }