238 lines
8.0 KiB
C
238 lines
8.0 KiB
C
/*
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Copyright (c) 2009-2014 Roger Light <roger@atchoo.org>
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All rights reserved. This program and the accompanying materials
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are made available under the terms of the Eclipse Public License v1.0
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and Eclipse Distribution License v1.0 which accompany this distribution.
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The Eclipse Public License is available at
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http://www.eclipse.org/legal/epl-v10.html
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and the Eclipse Distribution License is available at
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http://www.eclipse.org/org/documents/edl-v10.php.
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Contributors:
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Roger Light - initial implementation and documentation.
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*/
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#include <assert.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifndef WIN32
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#include <unistd.h>
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#else
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#include <process.h>
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#include <winsock2.h>
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#define snprintf sprintf_s
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#endif
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#include <mosquitto.h>
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#include "client_shared.h"
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void my_message_callback(struct mosquitto *mosq, void *obj, const struct mosquitto_message *message)
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{
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struct mosq_config *cfg;
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int i;
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bool res;
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assert(obj);
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cfg = (struct mosq_config *)obj;
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if(message->retain && cfg->no_retain) return;
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if(cfg->filter_outs){
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for(i=0; i<cfg->filter_out_count; i++){
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mosquitto_topic_matches_sub(cfg->filter_outs[i], message->topic, &res);
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if(res) return;
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}
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}
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if(cfg->verbose){
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if(message->payloadlen){
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printf("%s ", message->topic);
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fwrite(message->payload, 1, message->payloadlen, stdout);
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if(cfg->eol){
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printf("\n");
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}
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}else{
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if(cfg->eol){
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printf("%s (null)\n", message->topic);
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}
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}
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fflush(stdout);
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}else{
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if(message->payloadlen){
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fwrite(message->payload, 1, message->payloadlen, stdout);
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if(cfg->eol){
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printf("\n");
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}
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fflush(stdout);
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}
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}
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}
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void my_connect_callback(struct mosquitto *mosq, void *obj, int result)
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{
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int i;
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struct mosq_config *cfg;
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assert(obj);
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cfg = (struct mosq_config *)obj;
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if(!result){
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for(i=0; i<cfg->topic_count; i++){
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mosquitto_subscribe(mosq, NULL, cfg->topics[i], cfg->topic_qos);
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}
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}else{
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if(result && !cfg->quiet){
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fprintf(stderr, "%s\n", mosquitto_connack_string(result));
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}
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}
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}
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void my_subscribe_callback(struct mosquitto *mosq, void *obj, int mid, int qos_count, const int *granted_qos)
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{
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int i;
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struct mosq_config *cfg;
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assert(obj);
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cfg = (struct mosq_config *)obj;
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if(!cfg->quiet) printf("Subscribed (mid: %d): %d", mid, granted_qos[0]);
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for(i=1; i<qos_count; i++){
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if(!cfg->quiet) printf(", %d", granted_qos[i]);
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}
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if(!cfg->quiet) printf("\n");
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}
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void my_log_callback(struct mosquitto *mosq, void *obj, int level, const char *str)
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{
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printf("%s\n", str);
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}
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void print_usage(void)
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{
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int major, minor, revision;
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mosquitto_lib_version(&major, &minor, &revision);
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printf("mosquitto_sub is a simple mqtt client that will subscribe to a single topic and print all messages it receives.\n");
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printf("mosquitto_sub version %s running on libmosquitto %d.%d.%d.\n\n", VERSION, major, minor, revision);
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printf("Usage: mosquitto_sub [-c] [-h host] [-k keepalive] [-p port] [-q qos] [-R] -t topic ...\n");
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printf(" [-T filter_out]\n");
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printf(" [-A bind_address] [-S]\n");
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printf(" [-i id] [-I id_prefix]\n");
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printf(" [-d] [-N] [--quiet] [-v]\n");
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printf(" [-u username [-P password]]\n");
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printf(" [--will-topic [--will-payload payload] [--will-qos qos] [--will-retain]]\n");
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#ifdef WITH_TLS
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printf(" [{--cafile file | --capath dir} [--cert file] [--key file]\n");
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printf(" [--ciphers ciphers] [--insecure]]\n");
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#ifdef WITH_TLS_PSK
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printf(" [--psk hex-key --psk-identity identity [--ciphers ciphers]]\n");
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#endif
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#endif
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printf(" mosquitto_sub --help\n\n");
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printf(" -A : bind the outgoing socket to this host/ip address. Use to control which interface\n");
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printf(" the client communicates over.\n");
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printf(" -c : disable 'clean session' (store subscription and pending messages when client disconnects).\n");
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printf(" -d : enable debug messages.\n");
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printf(" -h : mqtt host to connect to. Defaults to localhost.\n");
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printf(" -i : id to use for this client. Defaults to mosquitto_sub_ appended with the process id.\n");
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printf(" -I : define the client id as id_prefix appended with the process id. Useful for when the\n");
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printf(" broker is using the clientid_prefixes option.\n");
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printf(" -k : keep alive in seconds for this client. Defaults to 60.\n");
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printf(" -N : do not add an end of line character when printing the payload.\n");
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printf(" -p : network port to connect to. Defaults to 1883.\n");
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printf(" -q : quality of service level to use for the subscription. Defaults to 0.\n");
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printf(" -R : do not print stale messages (those with retain set).\n");
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printf(" -S : use SRV lookups to determine which host to connect to.\n");
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printf(" -t : mqtt topic to subscribe to. May be repeated multiple times.\n");
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printf(" -u : provide a username (requires MQTT 3.1 broker)\n");
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printf(" -v : print published messages verbosely.\n");
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printf(" -P : provide a password (requires MQTT 3.1 broker)\n");
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printf(" --help : display this message.\n");
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printf(" --quiet : don't print error messages.\n");
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printf(" --will-payload : payload for the client Will, which is sent by the broker in case of\n");
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printf(" unexpected disconnection. If not given and will-topic is set, a zero\n");
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printf(" length message will be sent.\n");
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printf(" --will-qos : QoS level for the client Will.\n");
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printf(" --will-retain : if given, make the client Will retained.\n");
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printf(" --will-topic : the topic on which to publish the client Will.\n");
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#ifdef WITH_TLS
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printf(" --cafile : path to a file containing trusted CA certificates to enable encrypted\n");
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printf(" certificate based communication.\n");
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printf(" --capath : path to a directory containing trusted CA certificates to enable encrypted\n");
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printf(" communication.\n");
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printf(" --cert : client certificate for authentication, if required by server.\n");
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printf(" --key : client private key for authentication, if required by server.\n");
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printf(" --ciphers : openssl compatible list of TLS ciphers to support.\n");
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printf(" --tls-version : TLS protocol version, can be one of tlsv1.2 tlsv1.1 or tlsv1.\n");
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printf(" Defaults to tlsv1.2 if available.\n");
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printf(" --insecure : do not check that the server certificate hostname matches the remote\n");
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printf(" hostname. Using this option means that you cannot be sure that the\n");
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printf(" remote host is the server you wish to connect to and so is insecure.\n");
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printf(" Do not use this option in a production environment.\n");
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#ifdef WITH_TLS_PSK
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printf(" --psk : pre-shared-key in hexadecimal (no leading 0x) to enable TLS-PSK mode.\n");
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printf(" --psk-identity : client identity string for TLS-PSK mode.\n");
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#endif
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#endif
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printf("\nSee http://mosquitto.org/ for more information.\n\n");
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}
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int main(int argc, char *argv[])
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{
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struct mosq_config cfg;
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struct mosquitto *mosq = NULL;
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int rc;
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if(client_config_load(&cfg, CLIENT_SUB, argc, argv)){
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print_usage();
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return 1;
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}
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mosquitto_lib_init();
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if(client_id_generate(&cfg, "mosqsub")){
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return 1;
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}
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mosq = mosquitto_new(cfg.id, cfg.clean_session, &cfg);
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if(!mosq){
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switch(errno){
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case ENOMEM:
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if(!cfg.quiet) fprintf(stderr, "Error: Out of memory.\n");
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break;
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case EINVAL:
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if(!cfg.quiet) fprintf(stderr, "Error: Invalid id and/or clean_session.\n");
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break;
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}
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mosquitto_lib_cleanup();
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return 1;
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}
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if(client_opts_set(mosq, &cfg)){
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return 1;
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}
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if(cfg.debug){
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mosquitto_log_callback_set(mosq, my_log_callback);
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mosquitto_subscribe_callback_set(mosq, my_subscribe_callback);
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}
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mosquitto_connect_callback_set(mosq, my_connect_callback);
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mosquitto_message_callback_set(mosq, my_message_callback);
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rc = client_connect(mosq, &cfg);
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if(rc) return rc;
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rc = mosquitto_loop_forever(mosq, -1, 1);
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mosquitto_destroy(mosq);
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mosquitto_lib_cleanup();
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if(rc){
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fprintf(stderr, "Error: %s\n", mosquitto_strerror(rc));
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}
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return rc;
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}
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