Diff: Linux-example/linux-main.cpp

Revision:

8:a3e3113054a1

Parent:

3:7a6a899de7cc

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Linux-example/linux-main.cpp	Tue May 20 15:08:05 2014 +0000
@@ -0,0 +1,149 @@
+/*******************************************************************************
+ * Copyright (c) 2014 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 API and implementation and/or initial documentation
+ *******************************************************************************/
+  
+ /**
+  This is a sample program to illustrate the use of the MQTT Client library
+  on Linux.  The Client class requires two classes which mediate
+  access to system interfaces for networking and timing.  As long as these two
+  classes provide the required public programming interfaces, it does not matter
+  what facilities they use underneath. In this program, they use the Linux
+  system libraries.
+ 
+ */
+
+#if defined(LINUX)
+
+#include "LinuxMQTT.h"
+#include "LinuxIPStack.h"
+#include "MQTTClient.h"
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/select.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+
+#define DEFAULT_STACK_SIZE -1
+
+
+int arrivedcount = 0;
+
+void messageArrived(MQTT::Message* message)
+{
+	printf("Message %d arrived: qos %d, retained %d, dup %d, packetid %d\n", 
+		++arrivedcount, message->qos, message->retained, message->dup, message->id);
+    printf("Payload %.*s\n", message->payloadlen, (char*)message->payload);
+}
+
+
+int connect(MQTT::Client<IPStack, Countdown>::connectionLostInfo* info)
+{
+    const char* hostname = "localhost"; //"m2m.eclipse.org";
+    int port = 1883;
+    printf("Connecting to %s:%d\n", hostname, port);
+    int rc = info->network->connect(hostname, port);
+	if (rc != 0)
+	    printf("rc from TCP connect is %d\n", rc);
+ 
+    MQTTPacket_connectData data = MQTTPacket_connectData_initializer;       
+    data.MQTTVersion = 3;
+    data.clientID.cstring = (char*)"mbed-icraggs";
+    rc = info->client->connect(&data);
+	if (rc != 0)
+	    printf("rc from MQTT connect is %d\n", rc);
+    
+    return rc;
+}
+
+
+int main(int argc, char* argv[])
+{   
+    IPStack ipstack = IPStack();
+    float version = 0.3;
+    const char* topic = "mbed-sample";
+    
+    printf("Version is %f\n", version);
+              
+    MQTT::Client<IPStack, Countdown> client = MQTT::Client<IPStack, Countdown>(ipstack);
+    
+    client.setConnectionLostHandler(connect);
+
+    MQTT::Client<IPStack, Countdown>::connectionLostInfo info = {&client, &ipstack};
+    int rc = connect(&info);
+    
+    rc = client.subscribe(topic, MQTT::QOS2, messageArrived);   
+    if (rc != 0)
+        printf("rc from MQTT subscribe is %d\n", rc);
+
+    MQTT::Message message;
+
+    // QoS 0
+    char buf[100];
+    sprintf(buf, "Hello World!  QoS 0 message from app version %f", version);
+    message.qos = MQTT::QOS0;
+    message.retained = false;
+    message.dup = false;
+    message.payload = (void*)buf;
+    message.payloadlen = strlen(buf)+1;
+    rc = client.publish(topic, &message);
+    while (arrivedcount == 0)
+        client.yield(100);
+        
+    // QoS 1
+	printf("Now QoS 1\n");
+    sprintf(buf, "Hello World!  QoS 1 message from app version %f", version);
+    message.qos = MQTT::QOS1;
+    message.payloadlen = strlen(buf)+1;
+    rc = client.publish(topic, &message);
+    while (arrivedcount == 1)
+        client.yield(100);
+        
+    // QoS 2
+    sprintf(buf, "Hello World!  QoS 2 message from app version %f", version);
+    message.qos = MQTT::QOS2;
+    message.payloadlen = strlen(buf)+1;
+    rc = client.publish(topic, &message);
+    while (arrivedcount == 2)
+        client.yield(100);
+    
+    rc = client.unsubscribe(topic);
+    if (rc != 0)
+        printf("rc from unsubscribe was %d\n", rc);
+    
+    rc = client.disconnect();
+    if (rc != 0)
+        printf("rc from disconnect was %d\n", rc);
+    
+    ipstack.disconnect();
+    
+    printf("Finishing with %d messages received\n", arrivedcount);
+    
+    return 0;
+}
+
+#endif