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/*******************************************************************************
* Copyright (c) 2012, 2013 IBM Corp.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v1.0 which accompany this distribution.
*
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Ian Craggs - initial contribution
* Ian Craggs - change delimiter option from char to string
* Al Stockdill-Mander - Version using the embedded C client
*******************************************************************************/
/*
stdout subscriber
compulsory parameters:
topic to subscribe to
defaulted parameters:
--host localhost
--port 1883
--qos 2
--delimiter \n
--clientid stdout_subscriber
--userid none
--password none
for example:
stdoutsub topic/of/interest --host iot.eclipse.org
*/
#include <stdio.h>
#include "MQTTClient.h"
#include <stdio.h>
#include <signal.h>
#include <memory.h>
#include <sys/time.h>
volatile int toStop = 0;
void usage()
{
printf("MQTT stdout subscriber\n");
printf("Usage: stdoutsub topicname <options>, where options are:\n");
printf(" --host <hostname> (default is localhost)\n");
printf(" --port <port> (default is 1883)\n");
printf(" --qos <qos> (default is 2)\n");
printf(" --delimiter <delim> (default is \\n)\n");
printf(" --clientid <clientid> (default is hostname+timestamp)\n");
printf(" --username none\n");
printf(" --password none\n");
printf(" --showtopics <on or off> (default is on if the topic has a wildcard, else off)\n");
exit(-1);
}
void cfinish(int sig)
{
signal(SIGINT, NULL);
toStop = 1;
}
struct opts_struct
{
char* clientid;
int nodelimiter;
char* delimiter;
enum QoS qos;
char* username;
char* password;
char* host;
int port;
int showtopics;
} opts =
{
(char*)"stdout-subscriber", 0, (char*)"\n", QOS2, NULL, NULL, (char*)"localhost", 1883, 0
};
void getopts(int argc, char** argv)
{
int count = 2;
while (count < argc)
{
if (strcmp(argv[count], "--qos") == 0)
{
if (++count < argc)
{
if (strcmp(argv[count], "0") == 0)
opts.qos = QOS0;
else if (strcmp(argv[count], "1") == 0)
opts.qos = QOS1;
else if (strcmp(argv[count], "2") == 0)
opts.qos = QOS2;
else
usage();
}
else
usage();
}
else if (strcmp(argv[count], "--host") == 0)
{
if (++count < argc)
opts.host = argv[count];
else
usage();
}
else if (strcmp(argv[count], "--port") == 0)
{
if (++count < argc)
opts.port = atoi(argv[count]);
else
usage();
}
else if (strcmp(argv[count], "--clientid") == 0)
{
if (++count < argc)
opts.clientid = argv[count];
else
usage();
}
else if (strcmp(argv[count], "--username") == 0)
{
if (++count < argc)
opts.username = argv[count];
else
usage();
}
else if (strcmp(argv[count], "--password") == 0)
{
if (++count < argc)
opts.password = argv[count];
else
usage();
}
else if (strcmp(argv[count], "--delimiter") == 0)
{
if (++count < argc)
opts.delimiter = argv[count];
else
opts.nodelimiter = 1;
}
else if (strcmp(argv[count], "--showtopics") == 0)
{
if (++count < argc)
{
if (strcmp(argv[count], "on") == 0)
opts.showtopics = 1;
else if (strcmp(argv[count], "off") == 0)
opts.showtopics = 0;
else
usage();
}
else
usage();
}
count++;
}
}
void messageArrived(MessageData* md)
{
MQTTMessage* message = md->message;
if (opts.showtopics)
printf("%.*s\t", md->topicName->lenstring.len, md->topicName->lenstring.data);
if (opts.nodelimiter)
printf("%.*s", (int)message->payloadlen, (char*)message->payload);
else
printf("%.*s%s", (int)message->payloadlen, (char*)message->payload, opts.delimiter);
//fflush(stdout);
}
int main(int argc, char** argv)
{
int rc = 0;
unsigned char buf[100];
unsigned char readbuf[100];
if (argc < 2)
usage();
char* topic = argv[1];
if (strchr(topic, '#') || strchr(topic, '+'))
opts.showtopics = 1;
if (opts.showtopics)
printf("topic is %s\n", topic);
getopts(argc, argv);
Network n;
Client c;
signal(SIGINT, cfinish);
signal(SIGTERM, cfinish);
NewNetwork(&n);
ConnectNetwork(&n, opts.host, opts.port);
MQTTClient(&c, &n, 1000, buf, 100, readbuf, 100);
MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
data.willFlag = 0;
data.MQTTVersion = 3;
data.clientID.cstring = opts.clientid;
data.username.cstring = opts.username;
data.password.cstring = opts.password;
data.keepAliveInterval = 10;
data.cleansession = 1;
printf("Connecting to %s %d\n", opts.host, opts.port);
rc = MQTTConnect(&c, &data);
printf("Connected %d\n", rc);
printf("Subscribing to %s\n", topic);
rc = MQTTSubscribe(&c, topic, opts.qos, messageArrived);
printf("Subscribed %d\n", rc);
while (!toStop)
{
MQTTYield(&c, 1000);
}
printf("Stopping\n");
MQTTDisconnect(&c);
n.disconnect(&n);
return 0;
}
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