Start of two new samples

src/samples/pahopub.c

+/*******************************************************************************
+ * 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
+ *******************************************************************************/
+ 
+ /*
+ stdin publisher
+ 
+ compulsory parameters:
+ 
+  --topic topic to publish on
+ 
+ defaulted parameters:
+ 
+	--host localhost
+	--port 1883
+	--qos 0
+	--delimiters \n
+	--clientid stdin_publisher
+	--maxdatalen 100
+	
+	--userid none
+	--password none
+ 
+*/
+
+#include "MQTTClient.h"
+#include "MQTTClientPersistence.h"
+
+#include <stdio.h>
+#include <signal.h>
+#include <memory.h>
+
+
+#if defined(WIN32)
+#include <Windows.h>
+#define sleep Sleep
+#else
+#include <sys/time.h>
+#include <stdlib.h>
+#endif
+
+
+volatile int toStop = 0;
+
+
+void usage()
+{
+	printf("MQTT stdin publisher\n");
+	printf("Usage: stdinpub 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 0)\n");
+	printf("  --retained (default is off)\n");
+	printf("  --delimiter <delim> (default is \\n)");
+	printf("  --clientid <clientid> (default is hostname+timestamp)");
+	printf("  --maxdatalen 100\n");
+	printf("  --username none\n");
+	printf("  --password none\n");
+	exit(-1);
+}
+
+
+void myconnect(MQTTClient* client, MQTTClient_connectOptions* opts)
+{
+	printf("Connecting\n");
+	if (MQTTClient_connect(*client, opts) != 0)
+	{
+		printf("Failed to connect\n");
+		exit(-1);	
+	}
+	printf("Connected\n");
+}
+
+
+void cfinish(int sig)
+{
+	signal(SIGINT, NULL);
+	toStop = 1;
+}
+
+
+struct
+{
+	char* clientid;
+	char* delimiter;
+	int maxdatalen;
+	int qos;
+	int retained;
+	char* username;
+	char* password;
+	char* host;
+	char* port;
+  int verbose;
+} opts =
+{
+	"publisher", "\n", 100, 0, 0, NULL, NULL, "localhost", "1883", 0
+};
+
+void getopts(int argc, char** argv);
+
+int messageArrived(void* context, char* topicName, int topicLen, MQTTClient_message* m)
+{
+	/* not expecting any messages */
+	return 1;
+}
+
+int main(int argc, char** argv)
+{
+	MQTTClient client;
+	MQTTClient_connectOptions conn_opts = MQTTClient_connectOptions_initializer;
+	MQTTClient_SSLOptions ssl_opts = MQTTClient_SSLOptions_initializer;
+	char* topic = NULL;
+	char* buffer = NULL;
+	int rc = 0;
+	char url[100];
+
+	if (argc < 2)
+		usage();
+	
+	getopts(argc, argv);
+	
+	sprintf(url, "%s:%s", opts.host, opts.port);
+	if (opts.verbose)
+		printf("URL is %s\n", url);
+	
+	topic = argv[1];
+	printf("Using topic %s\n", topic);
+
+	rc = MQTTClient_create(&client, url, opts.clientid, MQTTCLIENT_PERSISTENCE_NONE, NULL);
+
+	signal(SIGINT, cfinish);
+	signal(SIGTERM, cfinish);
+
+	rc = MQTTClient_setCallbacks(client, NULL, NULL, messageArrived, NULL);
+
+	conn_opts.keepAliveInterval = 10;
+	conn_opts.reliable = 0;
+	conn_opts.cleansession = 1;
+	conn_opts.username = opts.username;
+	conn_opts.password = opts.password;
+	ssl_opts.enableServerCertAuth = 0;
+	conn_opts.ssl = &ssl_opts;
+	
+	myconnect(&client, &conn_opts);
+
+	buffer = malloc(opts.maxdatalen);
+	
+	while (!toStop)
+	{
+		int data_len = 0;
+		int delim_len = 0;
+		
+		delim_len = strlen(opts.delimiter);
+		do
+		{
+			buffer[data_len++] = getchar();
+			if (data_len > delim_len)
+			{
+			//printf("comparing %s %s\n", opts.delimiter, &buffer[data_len - delim_len]);
+			if (strncmp(opts.delimiter, &buffer[data_len - delim_len], delim_len) == 0)
+				break;
+			}
+		} while (data_len < opts.maxdatalen);
+				
+		if (opts.verbose)
+				printf("Publishing data of length %d\n", data_len);
+		rc = MQTTClient_publish(client, topic, data_len, buffer, opts.qos, opts.retained, NULL);
+		if (rc != 0)
+		{
+			myconnect(&client, &conn_opts);
+			rc = MQTTClient_publish(client, topic, data_len, buffer, opts.qos, opts.retained, NULL);
+		}
+		if (opts.qos > 0)
+			MQTTClient_yield();
+	}
+	
+	printf("Stopping\n");
+	
+	free(buffer);
+
+	MQTTClient_disconnect(client, 0);
+
+ 	MQTTClient_destroy(&client);
+
+	return 0;
+}
+
+void getopts(int argc, char** argv)
+{
+	int count = 2;
+	
+	while (count < argc)
+	{
+		if (strcmp(argv[count], "--retained") == 0)
+			opts.retained = 1;
+		if (strcmp(argv[count], "--verbose") == 0)
+			opts.verbose = 1;
+		else if (strcmp(argv[count], "--qos") == 0)
+		{
+			if (++count < argc)
+			{
+				if (strcmp(argv[count], "0") == 0)
+					opts.qos = 0;
+				else if (strcmp(argv[count], "1") == 0)
+					opts.qos = 1;
+				else if (strcmp(argv[count], "2") == 0)
+					opts.qos = 2;
+				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 = 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], "--maxdatalen") == 0)
+		{
+			if (++count < argc)
+				opts.maxdatalen = atoi(argv[count]);
+			else
+				usage();
+		}
+		else if (strcmp(argv[count], "--delimiter") == 0)
+		{
+			if (++count < argc)
+				opts.delimiter = argv[count];
+			else
+				usage();
+		}
+		count++;
+	}
+	
+}
+