diff --git a/Makefile b/Makefile
index 6cb0d501..e82dda83 100755
--- a/Makefile
+++ b/Makefile
@@ -90,7 +90,7 @@ SYNC_SAMPLES = ${addprefix ${blddir}/samples/,${SAMPLE_FILES_C}}
 SAMPLE_FILES_A = paho_c_pub paho_c_sub MQTTAsync_subscribe MQTTAsync_publish
 ASYNC_SAMPLES = ${addprefix ${blddir}/samples/,${SAMPLE_FILES_A}}
 
-TEST_FILES_C = test1 test15 test2 sync_client_test test_mqtt4sync
+TEST_FILES_C = test1 test15 test2 sync_client_test test_mqtt4sync test10
 SYNC_TESTS = ${addprefix ${blddir}/test/,${TEST_FILES_C}}
 
 TEST_FILES_CS = test3
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index de4b55df..d9c92498 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -48,6 +48,7 @@ SET(common_src
     Heap.c
     LinkedList.c
     MQTTProperties.c
+    MQTTReasonCodes.c
     Base64.c
     SHA1.c
     WebSocket.c
diff --git a/src/MQTTClient.c b/src/MQTTClient.c
index 2510168f..a0aa54eb 100644
--- a/src/MQTTClient.c
+++ b/src/MQTTClient.c
@@ -205,6 +205,12 @@ typedef struct
 	MQTTClient_deliveryComplete* dc;
 	void* context;
 
+	MQTTClient_disconnected* disconnected;
+	void* disconnected_context; /* the context to be associated with the disconnected callback*/
+
+	MQTTClient_authHandle* auth_handle;
+	void* auth_handle_context; /* the context to be associated with the authHandle callback*/
+
 	sem_type connect_sem;
 	int rc; /* getsockopt return code in connect */
 	sem_type connack_sem;
@@ -214,6 +220,13 @@ typedef struct
 
 } MQTTClients;
 
+struct props_rc_parms
+{
+	MQTTClients* m;
+	MQTTProperties* properties;
+	enum MQTTReasonCodes reasonCode;
+};
+
 void MQTTClient_sleep(long milliseconds)
 {
 	FUNC_ENTRY;
@@ -546,6 +559,18 @@ void MQTTClient_free(void* memory)
 }
 
 
+DLLExport void MQTTResponse_free(MQTTResponse response)
+{
+	FUNC_ENTRY;
+	if (response.properties)
+	{
+		MQTTProperties_free(response.properties);
+		free(response.properties);
+	}
+	FUNC_EXIT;
+}
+
+
 static int MQTTClient_deliverMessage(int rc, MQTTClients* m, char** topicName, int* topicLen, MQTTClient_message** message)
 {
 	qEntry* qe = (qEntry*)(m->c->messageQueue->first->content);
@@ -594,6 +619,81 @@ static thread_return_type WINAPI connectionLost_call(void* context)
 }
 
 
+int MQTTClient_setDisconnected(MQTTClient handle, void* context, MQTTClient_disconnected* disconnected)
+{
+	int rc = MQTTCLIENT_SUCCESS;
+	MQTTClients* m = handle;
+
+	FUNC_ENTRY;
+	Thread_lock_mutex(mqttclient_mutex);
+
+	if (m == NULL || m->c->connect_state != NOT_IN_PROGRESS)
+		rc = MQTTCLIENT_FAILURE;
+	else
+	{
+		m->disconnected_context = context;
+		m->disconnected = disconnected;
+	}
+
+	Thread_unlock_mutex(mqttclient_mutex);
+	FUNC_EXIT_RC(rc);
+	return rc;
+}
+
+
+/**
+ * Wrapper function to call disconnected on a separate thread.  A separate thread is needed to allow the
+ * disconnected function to make API calls (e.g. connect)
+ * @param context a pointer to the relevant client
+ * @return thread_return_type standard thread return value - not used here
+ */
+static thread_return_type WINAPI call_disconnected(void* context)
+{
+	struct props_rc_parms* pr = (struct props_rc_parms*)context;
+
+	(*(pr->m->disconnected))(pr->m->disconnected_context, pr->properties, pr->reasonCode);
+	MQTTProperties_free(pr->properties);
+	return 0;
+}
+
+
+int MQTTClient_setAuthHandle(MQTTClient handle, void* context, MQTTClient_authHandle* auth_handle)
+{
+	int rc = MQTTCLIENT_SUCCESS;
+	MQTTClients* m = handle;
+
+	FUNC_ENTRY;
+	Thread_lock_mutex(mqttclient_mutex);
+
+	if (m == NULL || m->c->connect_state != NOT_IN_PROGRESS)
+		rc = MQTTCLIENT_FAILURE;
+	else
+	{
+		m->auth_handle_context = context;
+		m->auth_handle = auth_handle;
+	}
+
+	Thread_unlock_mutex(mqttclient_mutex);
+	FUNC_EXIT_RC(rc);
+	return rc;
+}
+
+
+/**
+ * Wrapper function to call authHandle on a separate thread.  A separate thread is needed to allow the
+ * disconnected function to make API calls (e.g. MQTTClient_auth)
+ * @param context a pointer to the relevant client
+ * @return thread_return_type standard thread return value - not used here
+ */
+static thread_return_type WINAPI call_auth_handle(void* context)
+{
+	struct props_rc_parms* pr = (struct props_rc_parms*)context;
+
+	(*(pr->m->auth_handle))(pr->m->auth_handle_context, pr->properties, pr->reasonCode);
+	return 0;
+}
+
+
 /* This is the thread function that handles the calling of callback functions if set */
 static thread_return_type WINAPI MQTTClient_run(void* n)
 {
@@ -699,6 +799,33 @@ static thread_return_type WINAPI MQTTClient_run(void* n)
 					m->pack = pack;
 					Thread_post_sem(m->unsuback_sem);
 				}
+				else if (m->c->MQTTVersion >= MQTTVERSION_5)
+				{
+					if (pack->header.bits.type == DISCONNECT && m->disconnected)
+					{
+						struct props_rc_parms dp;
+						Ack* disc = (Ack*)pack;
+
+						dp.m = m;
+						dp.properties = &disc->properties;
+						dp.reasonCode = disc->rc;
+						free(pack);
+						Log(TRACE_MIN, -1, "Calling disconnected for client %s", m->c->clientID);
+						Thread_start(call_disconnected, &dp);
+					}
+					if (pack->header.bits.type == AUTH && m->auth_handle)
+					{
+						struct props_rc_parms dp;
+						Ack* disc = (Ack*)pack;
+
+						dp.m = m;
+						dp.properties = &disc->properties;
+						dp.reasonCode = disc->rc;
+						free(pack);
+						Log(TRACE_MIN, -1, "Calling auth_handle for client %s", m->c->clientID);
+						Thread_start(call_auth_handle, &dp);
+					}
+				}
 			}
 			else if (m->c->connect_state == TCP_IN_PROGRESS && !Thread_check_sem(m->connect_sem))
 			{
@@ -1112,7 +1239,10 @@ static MQTTResponse MQTTClient_connectURIVersion(MQTTClient handle, MQTTClient_c
 						rc = MQTTCLIENT_DISCONNECTED;
 				}
 				if (m->c->MQTTVersion == MQTTVERSION_5)
-					resp.properties = &connack->properties;
+				{
+					resp.properties = malloc(sizeof(MQTTProperties));
+					*resp.properties = MQTTProperties_copy(&connack->properties);
+				}
 			}
 			MQTTPacket_freeConnack(connack);
 			m->pack = NULL;
@@ -1930,7 +2060,7 @@ MQTTResponse MQTTClient_publishMessage5(MQTTClient handle, const char* topicName
 		goto exit;
 	}
 
-	if (message->struct_version == 1)
+	if (message->struct_version >= 1)
 		props = &message->properties;
 
 	rc = MQTTClient_publish5(handle, topicName, message->payloadlen, message->payload,
diff --git a/src/MQTTClient.h b/src/MQTTClient.h
index b4f51a5e..a99e0ece 100644
--- a/src/MQTTClient.h
+++ b/src/MQTTClient.h
@@ -414,6 +414,67 @@ DLLExport int MQTTClient_setCallbacks(MQTTClient handle, void* context, MQTTClie
 									MQTTClient_messageArrived* ma, MQTTClient_deliveryComplete* dc);
 
 
+/**
+ * This is a callback function, which will be called when the client
+ * library successfully connects.  This is superfluous when the connection
+ * is made in response to a MQTTAsync_connect call, because the onSuccess
+ * callback can be used.  It is intended for use when automatic reconnect
+ * is enabled, so that when a reconnection attempt succeeds in the background,
+ * the application is notified and can take any required actions.
+ * @param context A pointer to the <i>context</i> value originally passed to
+ * MQTTAsync_setCallbacks(), which contains any application-specific context.
+ * @param cause The reason for the disconnection.
+ * Currently, <i>cause</i> is always set to NULL.
+ */
+typedef void MQTTClient_disconnected(void* context, MQTTProperties* properties,
+		enum MQTTReasonCodes reasonCode);
+
+/**
+ * Sets the MQTTClient_disconnected() callback function for a client.
+ * @param handle A valid client handle from a successful call to
+ * MQTTAsync_create().
+ * @param context A pointer to any application-specific context. The
+ * the <i>context</i> pointer is passed to each of the callback functions to
+ * provide access to the context information in the callback.
+ * @param co A pointer to an MQTTAsync_connected() callback
+ * function.  NULL removes the callback setting.
+ * @return ::MQTTASYNC_SUCCESS if the callbacks were correctly set,
+ * ::MQTTASYNC_FAILURE if an error occurred.
+ */
+DLLExport int MQTTClient_setDisconnected(MQTTClient handle, void* context, MQTTClient_disconnected* co);
+
+
+/**
+ * This is a callback function, which will be called when the client
+ * library successfully connects.  This is superfluous when the connection
+ * is made in response to a MQTTAsync_connect call, because the onSuccess
+ * callback can be used.  It is intended for use when automatic reconnect
+ * is enabled, so that when a reconnection attempt succeeds in the background,
+ * the application is notified and can take any required actions.
+ * @param context A pointer to the <i>context</i> value originally passed to
+ * MQTTAsync_setCallbacks(), which contains any application-specific context.
+ * @param cause The reason for the disconnection.
+ * Currently, <i>cause</i> is always set to NULL.
+ */
+typedef void MQTTClient_authHandle(void* context, MQTTProperties* properties,
+		enum MQTTReasonCodes reasonCode);
+
+
+/**
+ * Sets the MQTTClient_authHandle() callback function for a client.
+ * @param handle A valid client handle from a successful call to
+ * MQTTAsync_create().
+ * @param context A pointer to any application-specific context. The
+ * the <i>context</i> pointer is passed to each of the callback functions to
+ * provide access to the context information in the callback.
+ * @param co A pointer to an MQTTAsync_connected() callback
+ * function.  NULL removes the callback setting.
+ * @return ::MQTTASYNC_SUCCESS if the callbacks were correctly set,
+ * ::MQTTASYNC_FAILURE if an error occurred.
+ */
+DLLExport int MQTTClient_setAuthHandle(MQTTClient handle, void* context, MQTTClient_authHandle* ah);
+
+
 /**
  * This function creates an MQTT client ready for connection to the
  * specified server and using the specified persistent storage (see
@@ -785,6 +846,8 @@ typedef struct MQTTResponse
 	MQTTProperties* properties; /* optional */
 } MQTTResponse;
 
+DLLExport void MQTTResponse_free(MQTTResponse response);
+
 DLLExport MQTTResponse MQTTClient_connect5(MQTTClient handle, MQTTClient_connectOptions* options,
 		MQTTProperties* connectProperties, MQTTProperties* willProperties);
 
diff --git a/src/MQTTPacket.c b/src/MQTTPacket.c
index 93475653..8670b735 100644
--- a/src/MQTTPacket.c
+++ b/src/MQTTPacket.c
@@ -85,7 +85,8 @@ pf new_packets[] =
 	MQTTPacket_unsuback, /**< UNSUBACK */
 	MQTTPacket_header_only, /**< PINGREQ */
 	MQTTPacket_header_only, /**< PINGRESP */
-	MQTTPacket_header_only  /**< DISCONNECT */
+	MQTTPacket_ack,  /**< DISCONNECT */
+	MQTTPacket_ack   /**< AUTH */
 };
 
 
@@ -132,7 +133,9 @@ void* MQTTPacket_Factory(int MQTTVersion, networkHandles* net, int* error)
 	else
 	{
 		ptype = header.bits.type;
-		if (ptype < CONNECT || ptype > DISCONNECT || new_packets[ptype] == NULL)
+		if (ptype < CONNECT || (MQTTVersion < MQTTVERSION_5 && ptype >= DISCONNECT) ||
+				(MQTTVersion >= MQTTVERSION_5 && ptype > AUTH) ||
+				new_packets[ptype] == NULL)
 			Log(TRACE_MIN, 2, NULL, ptype);
 		else
 		{
@@ -723,7 +726,8 @@ void* MQTTPacket_ack(int MQTTVersion, unsigned char aHeader, char* data, size_t
 	FUNC_ENTRY;
 	pack->MQTTVersion = MQTTVersion;
 	pack->header.byte = aHeader;
-	pack->msgId = readInt(&curdata);
+	if (pack->header.bits.type != DISCONNECT)
+		pack->msgId = readInt(&curdata);
 	if (MQTTVersion >= MQTTVERSION_5)
 	{
 		MQTTProperties props = MQTTProperties_initializer;
@@ -736,8 +740,6 @@ void* MQTTPacket_ack(int MQTTVersion, unsigned char aHeader, char* data, size_t
 
 		if (datalen > 3)
 		{
-			pack->properties.max_count = 10;
-			pack->properties.array = malloc(sizeof(MQTTProperty) * pack->properties.max_count);
 			if (MQTTProperties_read(&pack->properties, &curdata, enddata) != 1)
 			{
 				free(pack);
diff --git a/src/MQTTProperties.c b/src/MQTTProperties.c
index 0a3e7821..b46b459f 100644
--- a/src/MQTTProperties.c
+++ b/src/MQTTProperties.c
@@ -25,7 +25,7 @@
 
 #define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
 
-struct nameToType
+static struct nameToType
 {
   enum PropertyNames name;
   enum PropertyTypes type;
diff --git a/src/MQTTProtocolClient.c b/src/MQTTProtocolClient.c
index 40f576d5..2dc0907a 100644
--- a/src/MQTTProtocolClient.c
+++ b/src/MQTTProtocolClient.c
@@ -163,6 +163,7 @@ int MQTTProtocol_startPublish(Clients* pubclient, Publish* publish, int qos, int
 		p.payload = (*mm)->publish->payload;
 		p.topic = (*mm)->publish->topic;
 		p.properties = (*mm)->properties;
+		p.MQTTVersion = (*mm)->MQTTVersion;
 	}
 	rc = MQTTProtocol_startPublishCommon(pubclient, &p, qos, retained);
 	FUNC_EXIT_RC(rc);
diff --git a/src/MQTTReasonCodes.c b/src/MQTTReasonCodes.c
new file mode 100644
index 00000000..40ac80af
--- /dev/null
+++ b/src/MQTTReasonCodes.c
@@ -0,0 +1,100 @@
+/*******************************************************************************
+ * Copyright (c) 2017, 2018 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
+ *******************************************************************************/
+
+#include "MQTTReasonCodes.h"
+
+#include "Heap.h"
+#include "StackTrace.h"
+
+#include <memory.h>
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
+
+static struct {
+	enum MQTTReasonCodes value;
+	const char* name;
+} nameToString[] =
+{
+  {SUCCESS, "SUCCESS"},
+  {NORMAL_DISCONNECTION, "Normal disconnection"},
+  {GRANTED_QOS_0, "Granted QoS 0"},
+  {GRANTED_QOS_1, "Granted QoS 1"},
+  {GRANTED_QOS_2, "Granted QoS 2"},
+  {DISCONNECT_WITH_WILL_MESSAGE, "Disconnect with Will Messge"},
+  {NO_MATCHING_SUBSCRIBERS, "No matching subscribers"},
+  {NO_SUBSCRIPTION_FOUND, "No subscription found"},
+  {CONTINUE_AUTHENTICATION, "Continue authentication"},
+  {RE_AUTHENTICATE, "Re-authenticate"},
+  {UNSPECIFIED_ERROR, "Unspecified error"},
+  {MALFORMED_PACKET, "Malformed Packet"},
+  {PROTOCOL_ERROR, "Protocol error"},
+  {IMPLEMENTATION_SPECIFIC_ERROR, "Implementation specific error"},
+  {UNSUPPORTED_PROTOCOL_VERSION, "Unsupported Protocol Version"},
+  {CLIENT_IDENTIFIER_NOT_VALID, "Client Identifier not valid"},
+  {BAD_USER_NAME_OR_PASSWORD, "Bad User Name or Password"},
+  {NOT_AUTHORIZED, "Not authorized"},
+  {SERVER_UNAVAILABLE, "Server unavailable"},
+  {SERVER_BUSY, "Server busy"},
+  {BANNED, "Banned"},
+  {SERVER_SHUTTING_DOWN, "Server shutting down"},
+  {BAD_AUTHENTICATION_METHOD, "Bad authentication method"},
+  {KEEP_ALIVE_TIMEOUT, "Keep Alive timeout"},
+  {SESSION_TAKEN_OVER, "Session taken over"},
+  {TOPIC_FILTER_INVALID, "Topic filter invalid"},
+  {TOPIC_NAME_INVALID, "Topic name invalid"},
+  {PACKET_IDENTIFIER_IN_USE, "Packet Identifier in use"},
+  {PACKET_IDENTIFIER_NOT_FOUND, "Packet Identifier not found"},
+  {RECEIVE_MAXIMUM_EXCEEDED, "Receive Maximum exceeded"},
+  {TOPIC_ALIAS_INVALID, "Topic Alias invalid"},
+  {PACKET_TOO_LARGE, "Packet too large"},
+  {MESSAGE_RATE_TOO_HIGH, "Message rate too high"},
+  {QUOTA_EXCEEDED, "Quota exceeded"},
+  {ADMINISTRATIVE_ACTION, "Administrative action"},
+  {PAYLOAD_FORMAT_INVALID, "Payload format invalid"},
+  {RETAIN_NOT_SUPPORTED, "Retain not supported"},
+  {QOS_NOT_SUPPORTED, "QoS not supported"},
+  {USE_ANOTHER_SERVER, "Use another server"},
+  {SERVER_MOVED, "Server moved"},
+  {SHARED_SUBSCRIPTIONS_NOT_SUPPORTED, "Shared subscriptions not supported"},
+  {CONNECTION_RATE_EXCEEDED, "Connection rate exceeded"},
+  {MAXIMUM_CONNECT_TIME, "Maximum connect time"},
+  {SUBSCRIPTION_IDENTIFIERS_NOT_SUPPORTED, "Subscription Identifiers not supported"},
+  {WILDCARD_SUBSCRIPTIONS_NOT_SUPPORTED, "Wildcard Subscriptions not supported"}
+};
+
+const char* MQTTReasonCodeString(enum MQTTReasonCodes value)
+{
+  int i = 0;
+  const char* result = NULL;
+
+  for (i = 0; i < ARRAY_SIZE(nameToString); ++i)
+  {
+    if (nameToString[i].value == value)
+    {
+    	  result = nameToString[i].name;
+    	  break;
+    }
+  }
+  return result;
+}
+
+
+
+
+
+
+
+
diff --git a/src/MQTTReasonCodes.h b/src/MQTTReasonCodes.h
index d0928421..a7f37173 100644
--- a/src/MQTTReasonCodes.h
+++ b/src/MQTTReasonCodes.h
@@ -58,11 +58,21 @@ enum MQTTReasonCodes {
   QOS_NOT_SUPPORTED = 155,
   USE_ANOTHER_SERVER = 156,
   SERVER_MOVED = 157,
-  SHARED_SUBSCRIPTION_NOT_SUPPORTED = 158,
+  SHARED_SUBSCRIPTIONS_NOT_SUPPORTED = 158,
   CONNECTION_RATE_EXCEEDED = 159,
   MAXIMUM_CONNECT_TIME = 160,
   SUBSCRIPTION_IDENTIFIERS_NOT_SUPPORTED = 161,
-  WILDCARD_SUBSCRIPTION_NOT_SUPPORTED = 162
+  WILDCARD_SUBSCRIPTIONS_NOT_SUPPORTED = 162
 };
 
+#if defined(WIN32) || defined(WIN64)
+  #define DLLImport __declspec(dllimport)
+  #define DLLExport __declspec(dllexport)
+#else
+  #define DLLImport extern
+  #define DLLExport __attribute__ ((visibility ("default")))
+#endif
+
+DLLExport const char* MQTTReasonCodeString(enum MQTTReasonCodes);
+
 #endif
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index c88c3cb4..dd251f1e 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -564,6 +564,26 @@ SET_TESTS_PROPERTIES(
 	PROPERTIES TIMEOUT 540
 )
 
+ADD_EXECUTABLE(
+	test10
+	test10.c
+)
+
+TARGET_LINK_LIBRARIES(
+	test10
+	paho-mqtt3c
+)
+
+ADD_TEST(
+	NAME test10-1-client_topic_aliases
+	COMMAND "test10" "--test_no" "1" "--connection" ${MQTT_TEST_BROKER} "--proxy_connection" ${MQTT_TEST_PROXY}
+)
+
+SET_TESTS_PROPERTIES(
+	test10-1-client_topic_aliases
+	PROPERTIES TIMEOUT 540
+)
+
 ADD_EXECUTABLE(
 	test_issue373
 	test_issue373.c
diff --git a/test/test10.c b/test/test10.c
new file mode 100644
index 00000000..8275ffa4
--- /dev/null
+++ b/test/test10.c
@@ -0,0 +1,611 @@
+/*******************************************************************************
+ * Copyright (c) 2009, 2018 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
+ *    Ian Craggs - MQTT 5.0 support
+ *******************************************************************************/
+
+
+/**
+ * @file
+ * MQTT V5 specific tests for the MQTT C client
+ *
+ *  - topic aliases
+ *  - subscription ids
+ *  - session expiry
+ *  - payload format
+ *  - flow control
+ *  - QoS 2 exchange termination
+ *  - request/response
+ *  - shared subscriptions
+ *  - server initiated disconnect
+ *  - auth packets
+ *  - server assigned clientid returned in a property
+ *  - server defined keepalive
+ *  - subscribe failure
+ */
+
+
+#include "MQTTClient.h"
+#include <string.h>
+#include <stdlib.h>
+
+#if !defined(_WINDOWS)
+  #include <sys/time.h>
+  #include <sys/socket.h>
+  #include <unistd.h>
+  #include <errno.h>
+#else
+  #include <windows.h>
+  #define setenv(a, b, c) _putenv_s(a, b)
+#endif
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
+
+void usage(void)
+{
+	printf("help!!\n");
+	exit(EXIT_FAILURE);
+}
+
+struct Options
+{
+	char* connection;         /**< connection to system under test. */
+	char** haconnections;
+	char* proxy_connection;
+	int hacount;
+	int verbose;
+	int test_no;
+	int MQTTVersion;
+	int iterations;
+} options =
+{
+	"tcp://localhost:1883",
+	NULL,
+	"tcp://localhost:1884",
+	0,
+	0,
+	0,
+	MQTTVERSION_5,
+	1,
+};
+
+void getopts(int argc, char** argv)
+{
+	int count = 1;
+
+	while (count < argc)
+	{
+		if (strcmp(argv[count], "--test_no") == 0)
+		{
+			if (++count < argc)
+				options.test_no = atoi(argv[count]);
+			else
+				usage();
+		}
+		else if (strcmp(argv[count], "--connection") == 0)
+		{
+			if (++count < argc)
+			{
+				options.connection = argv[count];
+				printf("\nSetting connection to %s\n", options.connection);
+			}
+			else
+				usage();
+		}
+		else if (strcmp(argv[count], "--haconnections") == 0)
+		{
+			if (++count < argc)
+			{
+				char* tok = strtok(argv[count], " ");
+				options.hacount = 0;
+				options.haconnections = malloc(sizeof(char*) * 5);
+				while (tok)
+				{
+					options.haconnections[options.hacount] = malloc(strlen(tok) + 1);
+					strcpy(options.haconnections[options.hacount], tok);
+					options.hacount++;
+					tok = strtok(NULL, " ");
+				}
+			}
+			else
+				usage();
+		}
+		else if (strcmp(argv[count], "--proxy_connection") == 0)
+		{
+			if (++count < argc)
+				options.proxy_connection = argv[count];
+			else
+				usage();
+		}
+		else if (strcmp(argv[count], "--MQTTversion") == 0)
+		{
+			if (++count < argc)
+			{
+				options.MQTTVersion = atoi(argv[count]);
+				printf("setting MQTT version to %d\n", options.MQTTVersion);
+			}
+			else
+				usage();
+		}
+		else if (strcmp(argv[count], "--iterations") == 0)
+		{
+			if (++count < argc)
+				options.iterations = atoi(argv[count]);
+			else
+				usage();
+		}
+		else if (strcmp(argv[count], "--verbose") == 0)
+		{
+			options.verbose = 1;
+			printf("\nSetting verbose on\n");
+		}
+		count++;
+	}
+}
+
+
+#define LOGA_DEBUG 0
+#define LOGA_INFO 1
+#include <stdarg.h>
+#include <time.h>
+#include <sys/timeb.h>
+void MyLog(int LOGA_level, char* format, ...)
+{
+	static char msg_buf[256];
+	va_list args;
+	struct timeb ts;
+
+	struct tm timeinfo;
+
+	if (LOGA_level == LOGA_DEBUG && options.verbose == 0)
+	  return;
+
+	strcpy(msg_buf, "");
+	ftime(&ts);
+	localtime_r(&ts.time, &timeinfo);
+	strftime(msg_buf, 80, "%Y%m%d %H%M%S", &timeinfo);
+
+	sprintf(&msg_buf[strlen(msg_buf)], ".%.3hu ", ts.millitm);
+
+	va_start(args, format);
+	vsnprintf(&msg_buf[strlen(msg_buf)], sizeof(msg_buf) - strlen(msg_buf), format, args);
+	va_end(args);
+
+	printf("%s\n", msg_buf);
+	fflush(stdout);
+}
+
+
+#if defined(WIN32) || defined(_WINDOWS)
+#define mqsleep(A) Sleep(1000*A)
+#define START_TIME_TYPE DWORD
+static DWORD start_time = 0;
+START_TIME_TYPE start_clock(void)
+{
+	return GetTickCount();
+}
+#elif defined(AIX)
+#define mqsleep sleep
+#define START_TIME_TYPE struct timespec
+START_TIME_TYPE start_clock(void)
+{
+	static struct timespec start;
+	clock_gettime(CLOCK_REALTIME, &start);
+	return start;
+}
+#else
+#define mqsleep sleep
+#define START_TIME_TYPE struct timeval
+/* TODO - unused - remove? static struct timeval start_time; */
+START_TIME_TYPE start_clock(void)
+{
+	struct timeval start_time;
+	gettimeofday(&start_time, NULL);
+	return start_time;
+}
+#endif
+
+
+#if defined(WIN32)
+long elapsed(START_TIME_TYPE start_time)
+{
+	return GetTickCount() - start_time;
+}
+#elif defined(AIX)
+#define assert(a)
+long elapsed(struct timespec start)
+{
+	struct timespec now, res;
+
+	clock_gettime(CLOCK_REALTIME, &now);
+	ntimersub(now, start, res);
+	return (res.tv_sec)*1000L + (res.tv_nsec)/1000000L;
+}
+#else
+long elapsed(START_TIME_TYPE start_time)
+{
+	struct timeval now, res;
+
+	gettimeofday(&now, NULL);
+	timersub(&now, &start_time, &res);
+	return (res.tv_sec)*1000 + (res.tv_usec)/1000;
+}
+#endif
+
+
+#define assert(a, b, c, d) myassert(__FILE__, __LINE__, a, b, c, d)
+#define assert1(a, b, c, d, e) myassert(__FILE__, __LINE__, a, b, c, d, e)
+
+int tests = 0;
+int failures = 0;
+FILE* xml;
+START_TIME_TYPE global_start_time;
+char output[3000];
+char* cur_output = output;
+
+
+void write_test_result(void)
+{
+	long duration = elapsed(global_start_time);
+
+	fprintf(xml, " time=\"%ld.%.3ld\" >\n", duration / 1000, duration % 1000);
+	if (cur_output != output)
+	{
+		fprintf(xml, "%s", output);
+		cur_output = output;
+	}
+	fprintf(xml, "</testcase>\n");
+}
+
+
+void myassert(char* filename, int lineno, char* description, int value, char* format, ...)
+{
+	++tests;
+	if (!value)
+	{
+		va_list args;
+
+		++failures;
+		MyLog(LOGA_INFO, "Assertion failed, file %s, line %d, description: %s\n", filename, lineno, description);
+
+		va_start(args, format);
+		vprintf(format, args);
+		va_end(args);
+
+		cur_output += sprintf(cur_output, "<failure type=\"%s\">file %s, line %d </failure>\n",
+                        description, filename, lineno);
+	}
+	else
+		MyLog(LOGA_DEBUG, "Assertion succeeded, file %s, line %d, description: %s", filename, lineno, description);
+}
+
+
+void logProperties(MQTTProperties *props)
+{
+	int i = 0;
+
+	for (i = 0; i < props->count; ++i)
+	{
+		int id = props->array[i].identifier;
+		const char* name = MQTTPropertyName(id);
+		char* intformat = "Property name %s value %d";
+
+		switch (MQTTProperty_getType(id))
+		{
+		case PROPERTY_TYPE_BYTE:
+		  MyLog(LOGA_INFO, intformat, name, props->array[i].value.byte);
+		  break;
+		case TWO_BYTE_INTEGER:
+		  MyLog(LOGA_INFO, intformat, name, props->array[i].value.integer2);
+		  break;
+		case FOUR_BYTE_INTEGER:
+		  MyLog(LOGA_INFO, intformat, name, props->array[i].value.integer4);
+		  break;
+		case VARIABLE_BYTE_INTEGER:
+		  MyLog(LOGA_INFO, intformat, name, props->array[i].value.integer4);
+		  break;
+		case BINARY_DATA:
+		case UTF_8_ENCODED_STRING:
+		  MyLog(LOGA_INFO, "Property name value %s %.*s", name,
+			  props->array[i].value.data.len, props->array[i].value.data.data);
+		  break;
+		case UTF_8_STRING_PAIR:
+		  MyLog(LOGA_INFO, "Property name %s key %.*s value %.*s", name,
+			  props->array[i].value.data.len, props->array[i].value.data.data,
+		  	  props->array[i].value.value.len, props->array[i].value.value.data);
+		  break;
+		}
+	}
+}
+
+struct aa
+{
+	int disconnected;
+} test_topic_aliases_globals =
+{
+	0,
+};
+
+void disconnected(void* context, MQTTProperties* props, enum MQTTReasonCodes rc)
+{
+	MQTTClient c = (MQTTClient)context;
+	printf("Callback: disconnected, reason code \"%s\"\n", MQTTReasonCodeString(rc));
+	logProperties(props);
+	test_topic_aliases_globals.disconnected = 1;
+}
+
+static int messages_arrived = 0;
+
+int messageArrived(void* context, char* topicName, int topicLen, MQTTClient_message* message)
+{
+	MyLog(LOGA_DEBUG, "Callback: message received on topic %s is %.*s.",
+				 topicName, message->payloadlen, (char*)(message->payload));
+
+	assert("Message structure version should be 1", message->struct_version == 1,
+				"message->struct_version was %d", message->struct_version);
+	if (message->struct_version == 1)
+	{
+		const int props_count = 0;
+
+		assert("Properties count should be 0", message->properties.count == props_count,
+			"Properties count was %d\n", message->properties.count);
+		logProperties(&message->properties);
+	}
+	messages_arrived++;
+
+	MQTTClient_free(topicName);
+	MQTTClient_freeMessage(&message);
+	return 1;
+}
+
+
+int test_client_topic_aliases(struct Options options)
+{
+	int subsqos = 2;
+	MQTTClient c;
+	MQTTClient_connectOptions opts = MQTTClient_connectOptions_initializer;
+	MQTTClient_willOptions wopts = MQTTClient_willOptions_initializer;
+	MQTTProperties props = MQTTProperties_initializer;
+	MQTTProperties connect_props = MQTTProperties_initializer;
+	MQTTProperty property;
+	MQTTSubscribe_options subopts = MQTTSubscribe_options_initializer;
+	MQTTClient_message pubmsg = MQTTClient_message_initializer;
+	MQTTResponse response = {SUCCESS, NULL};
+	MQTTClient_deliveryToken dt;
+	int rc = 0;
+	int count = 0;
+	char* test_topic = "test_client_topic_aliases";
+	int topicAliasMaximum = 0;
+
+	fprintf(xml, "<testcase classname=\"test_client_topic_aliases\" name=\"client topic aliases\"");
+	global_start_time = start_clock();
+	failures = 0;
+	MyLog(LOGA_INFO, "Starting test 1 - client topic aliases");
+
+	rc = MQTTClient_create(&c, options.connection, "client_topic_alias_test",
+			MQTTCLIENT_PERSISTENCE_DEFAULT, NULL);
+	assert("good rc from create",  rc == MQTTCLIENT_SUCCESS, "rc was %d\n", rc);
+	if (rc != MQTTCLIENT_SUCCESS)
+	{
+		MQTTClient_destroy(&c);
+		goto exit;
+	}
+
+	rc = MQTTClient_setCallbacks(c, NULL, NULL, messageArrived, NULL);
+	assert("Good rc from setCallbacks", rc == MQTTCLIENT_SUCCESS, "rc was %d", rc);
+
+	rc = MQTTClient_setDisconnected(c, c, disconnected);
+	assert("Good rc from setDisconnected", rc == MQTTCLIENT_SUCCESS, "rc was %d", rc);
+
+	opts.keepAliveInterval = 20;
+	opts.cleansession = 1;
+	opts.MQTTVersion = options.MQTTVersion;
+	if (options.haconnections != NULL)
+	{
+		opts.serverURIs = options.haconnections;
+		opts.serverURIcount = options.hacount;
+	}
+
+	MyLog(LOGA_DEBUG, "Connecting");
+	response = MQTTClient_connect5(c, &opts, NULL, NULL);
+	assert("Good rc from connect", response.reasonCode == MQTTCLIENT_SUCCESS, "rc was %d", response.reasonCode);
+	if (response.reasonCode != MQTTCLIENT_SUCCESS)
+		goto exit;
+
+	if (response.properties)
+	{
+		logProperties(response.properties);
+		MQTTResponse_free(response);
+	}
+
+	pubmsg.payload = "a much longer message that we can shorten to the extent that we need to payload up to 11";
+	pubmsg.payloadlen = 11;
+	pubmsg.qos = 1;
+	pubmsg.retained = 0;
+
+	/* a Topic Alias of 0 is not allowed, so we should be disconnected */
+	property.identifier = TOPIC_ALIAS;
+	property.value.integer2 = 0;
+	MQTTProperties_add(&pubmsg.properties, &property);
+
+	response = MQTTClient_publishMessage5(c, test_topic, &pubmsg, &dt);
+	assert("Good rc from publish", response.reasonCode == MQTTCLIENT_SUCCESS, "rc was %d", response.reasonCode);
+
+	/* Now we expect to receive a disconnect packet telling us why */
+	count = 0;
+	while (test_topic_aliases_globals.disconnected == 0 && ++count < 10)
+	{
+#if defined(WIN32)
+		Sleep(1000);
+#else
+		usleep(1000000L);
+#endif
+	}
+	assert("Disconnected should be called", test_topic_aliases_globals.disconnected == 1,
+			"was %d", test_topic_aliases_globals.disconnected);
+
+	property.identifier = SESSION_EXPIRY_INTERVAL;
+	property.value.integer4 = 30;
+	MQTTProperties_add(&connect_props, &property);
+
+	/* Now try a valid topic alias */
+	response = MQTTClient_connect5(c, &opts, &connect_props, NULL);
+	assert("Good rc from connect", response.reasonCode == MQTTCLIENT_SUCCESS, "rc was %d", response.reasonCode);
+	if (response.reasonCode != MQTTCLIENT_SUCCESS)
+		goto exit;
+
+	if (response.properties)
+	{
+		if (MQTTProperties_hasProperty(response.properties, TOPIC_ALIAS_MAXIMUM))
+			topicAliasMaximum = MQTTProperties_getNumericValue(response.properties, TOPIC_ALIAS_MAXIMUM);
+
+		logProperties(response.properties);
+		MQTTResponse_free(response);
+	}
+	assert("topicAliasMaximum > 0", topicAliasMaximum > 0, "topicAliasMaximum was %d", topicAliasMaximum);
+
+	/* subscribe to a topic */
+	response = MQTTClient_subscribe5(c, test_topic, 2, NULL, NULL);
+	assert("Good rc from subscribe", response.reasonCode == MQTTCLIENT_SUCCESS, "rc was %d", response.reasonCode);
+
+	/* then publish to the topic */
+	MQTTProperties_free(&pubmsg.properties);
+	property.identifier = TOPIC_ALIAS;
+	property.value.integer2 = 1;
+	MQTTProperties_add(&pubmsg.properties, &property);
+
+	messages_arrived = 0;
+	response = MQTTClient_publishMessage5(c, test_topic, &pubmsg, &dt);
+	assert("Good rc from publish", response.reasonCode == MQTTCLIENT_SUCCESS, "rc was %d", response.reasonCode);
+
+	/* should get a response */
+	while (messages_arrived == 0 && ++count < 10)
+	{
+#if defined(WIN32)
+		Sleep(1000);
+#else
+		usleep(1000000L);
+#endif
+	}
+	assert("1 message should have arrived", messages_arrived == 1, "was %d", messages_arrived);
+
+	/* now publish to the topic alias only */
+	messages_arrived = 0;
+	response = MQTTClient_publishMessage5(c, "", &pubmsg, &dt);
+	assert("Good rc from publish", response.reasonCode == MQTTCLIENT_SUCCESS, "rc was %d", response.reasonCode);
+
+	/* should get a response */
+	while (messages_arrived == 0 && ++count < 10)
+	{
+#if defined(WIN32)
+		Sleep(1000);
+#else
+		usleep(1000000L);
+#endif
+	}
+	assert("1 message should have arrived", messages_arrived == 1, "was %d", messages_arrived);
+
+	rc = MQTTClient_disconnect5(c, 1000, SUCCESS, NULL);
+
+	/* Reconnect.  Topic aliases should be deleted, but not subscription */
+	opts.cleansession = 0;
+	response = MQTTClient_connect5(c, &opts, NULL, NULL);
+	assert("Good rc from connect", response.reasonCode == MQTTCLIENT_SUCCESS, "rc was %d", response.reasonCode);
+	MQTTResponse_free(response);
+	if (response.reasonCode != MQTTCLIENT_SUCCESS)
+		goto exit;
+
+	/* then publish to the topic */
+	MQTTProperties_free(&pubmsg.properties);
+	messages_arrived = 0;
+	response = MQTTClient_publishMessage5(c, test_topic, &pubmsg, &dt);
+	assert("Good rc from publish", response.reasonCode == MQTTCLIENT_SUCCESS, "rc was %d", response.reasonCode);
+
+	/* should get a response */
+	while (messages_arrived == 0 && ++count < 10)
+	{
+#if defined(WIN32)
+		Sleep(1000);
+#else
+		usleep(1000000L);
+#endif
+	}
+	assert("1 message should have arrived", messages_arrived == 1, "was %d", messages_arrived);
+
+	/* now publish to the topic alias only */
+	messages_arrived = 0;
+	property.identifier = TOPIC_ALIAS;
+	property.value.integer2 = 1;
+	MQTTProperties_add(&pubmsg.properties, &property);
+	response = MQTTClient_publishMessage5(c, "", &pubmsg, &dt);
+	assert("Good rc from publish", response.reasonCode == MQTTCLIENT_SUCCESS, "rc was %d", response.reasonCode);
+
+	/* should not get a response */
+	while (messages_arrived == 0 && ++count < 10)
+	{
+#if defined(WIN32)
+		Sleep(1000);
+#else
+		usleep(1000000L);
+#endif
+	}
+	assert("No message should have arrived", messages_arrived == 0, "was %d", messages_arrived);
+
+	MQTTProperties_free(&pubmsg.properties);
+	MQTTProperties_free(&props);
+	MQTTProperties_free(&connect_props);
+	MQTTClient_destroy(&c);
+
+exit:
+	MyLog(LOGA_INFO, "TEST1: test %s. %d tests run, %d failures.",
+			(failures == 0) ? "passed" : "failed", tests, failures);
+	write_test_result();
+	return failures;
+}
+
+
+int main(int argc, char** argv)
+{
+	int rc = 0;
+ 	int (*tests[])() = {NULL, test_client_topic_aliases};
+	int i;
+
+	xml = fopen("TEST-test1.xml", "w");
+	fprintf(xml, "<testsuite name=\"test1\" tests=\"%d\">\n", (int)(ARRAY_SIZE(tests) - 1));
+
+	setenv("MQTT_C_CLIENT_TRACE", "ON", 1);
+	setenv("MQTT_C_CLIENT_TRACE_LEVEL", "ERROR", 1);
+
+	getopts(argc, argv);
+
+	for (i = 0; i < options.iterations; ++i)
+	{
+	 	if (options.test_no == 0)
+		{ /* run all the tests */
+ 		   	for (options.test_no = 1; options.test_no < ARRAY_SIZE(tests); ++options.test_no)
+				rc += tests[options.test_no](options); /* return number of failures.  0 = test succeeded */
+		}
+		else
+ 		   	rc = tests[options.test_no](options); /* run just the selected test */
+	}
+
+ 	if (rc == 0)
+		MyLog(LOGA_INFO, "verdict pass");
+	else
+		MyLog(LOGA_INFO, "verdict fail");
+
+	fprintf(xml, "</testsuite>\n");
+	fclose(xml);
+	return rc;
+}
diff --git a/test/test15.c b/test/test15.c
index 3bae917a..63e17eab 100644
--- a/test/test15.c
+++ b/test/test15.c
@@ -58,9 +58,9 @@ struct Options
 	int iterations;
 } options =
 {
-	"tcp://iot.eclipse.org:1883",
-	NULL,
 	"tcp://localhost:1883",
+	NULL,
+	"tcp://localhost:1884",
 	0,
 	0,
 	0,
@@ -291,7 +291,7 @@ void test1_sendAndReceive(MQTTClient* c, int qos, char* test_topic)
 	char* topicName = NULL;
 	int topicLen;
 	int i = 0;
-	int iterations = 1; //50;
+	int iterations = 50;
 	int rc;
 	MQTTResponse resp;
 	MQTTProperty property;
@@ -463,7 +463,7 @@ int test1(struct Options options)
 	if (response.properties)
 	{
 		logProperties(response.properties);
-		MQTTProperties_free(response.properties);
+		MQTTResponse_free(response);
 	}
 
 	subopts.retainAsPublished = 1;
@@ -508,6 +508,7 @@ int test1(struct Options options)
 	/* Just to make sure we can connect again */
 	response = MQTTClient_connect5(c, &opts, NULL, NULL);
 	assert("Connect successful",  response.reasonCode == MQTTCLIENT_SUCCESS, "rc was %d", response.reasonCode);
+	MQTTResponse_free(response);
 	rc = MQTTClient_disconnect5(c, 0, SUCCESS, &props);
 	assert("Disconnect successful", rc == MQTTCLIENT_SUCCESS, "rc was %d", rc);
 
@@ -670,7 +671,9 @@ int test2(struct Options options)
 
 	MyLog(LOGA_DEBUG, "Connecting");
 	response = MQTTClient_connect5(c, &opts, &props, &willProps);
-	assert("Good rc from connect", rc == MQTTCLIENT_SUCCESS, "rc was %d", rc);
+	assert("Good rc from connect", response.reasonCode == MQTTCLIENT_SUCCESS,
+			"rc was %d", response.reasonCode);
+	MQTTResponse_free(response);
 	if (rc != MQTTCLIENT_SUCCESS)
 		goto exit;
 
@@ -719,6 +722,7 @@ int test3(struct Options options)
 	MQTTClient c;
 	MQTTClient_connectOptions opts = MQTTClient_connectOptions_initializer;
 	MQTTClient_willOptions wopts = MQTTClient_willOptions_initializer;
+	MQTTResponse response;
 
 	fprintf(xml, "<testcase classname=\"test1\" name=\"connack return codes\"");
 	global_start_time = start_clock();
@@ -756,8 +760,9 @@ int test3(struct Options options)
 	opts.will->qos = 1;
 	opts.will->retained = 0;
 	opts.will->topicName = "will topic";*/
-	rc = MQTTClient_connect(c, &opts);
+	response = MQTTClient_connect5(c, &opts, NULL, NULL);
 	//assert("Not authorized", rc == 5, "rc was %d\n", rc);
+	MQTTResponse_free(response);
 
 #if 0
 	/* successful connection (RC = 0) */
@@ -825,6 +830,7 @@ int test4_run(int qos)
 	response = MQTTClient_connect5(c, &opts, &props, NULL);
 	assert("Good rc from connect", response.reasonCode == MQTTCLIENT_SUCCESS,
 				"rc was %d", response.reasonCode);
+	MQTTResponse_free(response);
 	if (response.reasonCode != MQTTCLIENT_SUCCESS)
 		return -1;
 
@@ -879,6 +885,7 @@ int test4_run(int qos)
 	opts.cleansession = 0;
 	response = MQTTClient_connect5(c, &opts, NULL, NULL);
 	assert("Good rc from connect", response.reasonCode == MQTTCLIENT_SUCCESS, "rc was %d", response.reasonCode);
+	MQTTResponse_free(response);
 	if (response.reasonCode != MQTTCLIENT_SUCCESS)
 		return -1;
 
@@ -986,6 +993,7 @@ int test5(struct Options options)
 	MyLog(LOGA_DEBUG, "Connecting");
 	response = MQTTClient_connect5(c, &opts, &props, NULL);
 	assert("Good rc from connect", response.reasonCode == MQTTCLIENT_SUCCESS, "rc was %d", response.reasonCode);
+	MQTTResponse_free(response);
 	if (response.reasonCode != MQTTCLIENT_SUCCESS)
 	{
 		MQTTClient_destroy(&c);
@@ -1101,6 +1109,7 @@ int test6(struct Options options)
 	/* Connect to the broker */
 	response = MQTTClient_connect5(test6_c1, &opts, NULL, NULL);
 	assert("good rc from connect",  rc == MQTTCLIENT_SUCCESS, "rc was %d\n", rc);
+	MQTTResponse_free(response);
 	if (rc != MQTTCLIENT_SUCCESS)
 		goto exit;
 
@@ -1117,6 +1126,7 @@ int test6(struct Options options)
 	opts2.cleansession = 1;
 	MyLog(LOGA_INFO, "Connecting Client_2 ...");
 	response = MQTTClient_connect5(test6_c2, &opts2, NULL, NULL);
+	MQTTResponse_free(response);
 	assert("Good rc from connect", response.reasonCode == MQTTCLIENT_SUCCESS, "rc was %d\n", response.reasonCode);
 
 	response = MQTTClient_subscribe5(test6_c2, test6_will_topic, 2, NULL, NULL);
@@ -1211,6 +1221,7 @@ int test6a(struct Options options)
 	response = MQTTClient_connect5(test6_c1, &opts, NULL, NULL);
 	assert("good rc from connect",  response.reasonCode == MQTTCLIENT_SUCCESS,
 			"rc was %d\n", response.reasonCode);
+	MQTTResponse_free(response);
 	if (response.reasonCode != MQTTCLIENT_SUCCESS)
 		goto exit;
 
@@ -1227,6 +1238,7 @@ int test6a(struct Options options)
 	opts2.cleansession = 1;
 	MyLog(LOGA_INFO, "Connecting Client_2 ...");
 	response = MQTTClient_connect5(test6_c2, &opts2, NULL, NULL);
+	MQTTResponse_free(response);
 	assert("Good rc from connect", response.reasonCode == MQTTCLIENT_SUCCESS, "rc was %d\n", response.reasonCode);
 
 	response = MQTTClient_subscribe5(test6_c2, test6_will_topic, 2, NULL, NULL);