From: gaurav-aws <gaurav-aws@1d2547de-c912-0410-9cb9-b8ca96c0e9e2>
Date: Sun, 21 Jul 2019 22:14:13 +0000 (+0000)
Subject: Add first draft of mqtt example
X-Git-Tag: V10.3.0~131
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=453c01efb5836eaaf92c4cd1312cced9e60463b9;p=freertos

Add first draft of mqtt example

Note that it is still work in progress and not working as of now.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@2690 1d2547de-c912-0410-9cb9-b8ca96c0e9e2
---

diff --git a/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/DemoTasks/SimpleMQTTExamples.c b/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/DemoTasks/SimpleMQTTExamples.c
new file mode 100644
index 000000000..d0c9e0b6e
--- /dev/null
+++ b/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/DemoTasks/SimpleMQTTExamples.c
@@ -0,0 +1,447 @@
+/*
+ * FreeRTOS Kernel V10.2.1
+ * Copyright (C) 2017 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://www.FreeRTOS.org
+ * http://aws.amazon.com/freertos
+ *
+ * 1 tab == 4 spaces!
+ */
+
+/* Standard inclues. */
+#include <string.h>
+
+/* Kernel includes. */
+#include "FreeRTOS.h"
+#include "task.h"
+
+/* MQTT include. */
+#include "iot_mqtt.h"
+
+/* Platform FreeRTOS network include. */
+#include "platform/iot_network_freertos.h"
+
+/**
+ * @brief The keep-alive interval used for this example.
+ *
+ * An MQTT ping request will be sent periodically at this interval.
+ */
+#define mqttexampleKEEP_ALIVE_SECONDS		( 60 )
+
+/**
+ * @brief The timeout for MQTT operations in this example.
+ */
+#define mqttexampleMQTT_TIMEOUT_MS			( 5000 )
+
+/**
+ * @brief The MQTT client identifier used in this example.
+ */
+#define mqttexampleCLIENT_IDENTIFIER		"mqttexampleclient"
+
+/**
+ * @brief Details of the MQTT broker to connect to.
+ *
+ * @note This example does not use TLS and therefore won't work with AWS IoT.
+ */
+#define mqttexampleMQTT_BROKER_ENDPOINT		"10.60.214.105"
+#define mqttexampleMQTT_BROKER_PORT			1883
+
+/**
+ * @brief The topic to subscribe and publish to in the example.
+ */
+#define mqttexampleTOPIC					"example/topic"
+
+/**
+ * @brief The MQTT message published in this example.
+ */
+#define mqttexampleMESSAGE					"Hello World!"
+
+/**
+ * @brief Paramters to control the retry behaviour in case a QoS1 publish
+ * message gets lost.
+ *
+ * Retry every minutes up to a maximum of 5 retries.
+ */
+#define mqttexamplePUBLISH_RETRY_MS			( 1000 )
+#define mqttexamplePUBLISH_RETRY_LIMIT		( 5 )
+
+/**
+ * @brief The bit which is set in the demo task's notification value from the
+ * disconnect callback to inform the demo task about the MQTT disconnect.
+ */
+#define mqttexampleDISCONNECTED_BIT			( 1UL << 0UL )
+
+/**
+ * @brief The bit which is set in the demo task's notification value from the
+ * publish callback to inform the demo task about the message received from the
+ * MQTT broker.
+ */
+#define mqttexampleMESSAGE_RECEIVED_BIT		( 1UL << 1UL )
+/*-----------------------------------------------------------*/
+
+/**
+ * @brief The MQTT connection handle used in this example.
+ */
+static IotMqttConnection_t xMQTTConnection = IOT_MQTT_CONNECTION_INITIALIZER;
+/*-----------------------------------------------------------*/
+
+/**
+ * @brief The task used to demonstrate the MQTT API.
+ *
+ * @param[in] pvParameters Parmaters as passed at the time of task creation. Not
+ * used in this example.
+ */
+static void prvMQTTDemoTask( void *pvParameters );
+
+/**
+ * @brief The callback invoked by the MQTT library when the MQTT connection gets
+ * disconnected.
+ * 
+ * @param[in] pvCallbackContext Callback context as provided at the time of
+ * connect.
+ * @param[in] pxCallbackParams Contains the reason why the MQTT connection was
+ * disconnected.
+ */
+static void prvExample_DisconnectCallback( void * pvCallbackContext,
+										   IotMqttCallbackParam_t * pxCallbackParams );
+
+/**
+ * @brief The callback invoked by the MQTT library when a message is received on
+ * a subscribed topic from the MQTT broker.
+ * 
+ * @param[in] pvCallbackContext Callback context as provided at the time of
+ * subscribe.
+ * @param[in] pxCallbackParams Contain the details about the received message - 
+ * topic on which the message was received, the received message.
+ */
+static void prvExample_PublishCallback( void * pvCallbackContext,
+										IotMqttCallbackParam_t * pxCallbackParams );
+
+/**
+ * @brief Connects to the MQTT broker as specified in mqttexampleMQTT_BROKER_ENDPOINT
+ * and mqttexampleMQTT_BROKER_PORT.
+ * 
+ * @note This example does not use TLS and therefore will not work with MQTT.
+ */
+static void prvMQTTConnect( void );
+
+/**
+ * @brief Subscribes to the topic as specified in mqttexampleTOPIC.
+ */
+static void prvMQTTSubscribe( void );
+
+/**
+ * @brief Publishes a messages mqttexampleMESSAGE on mqttexampleTOPIC topic.
+ */
+static void prvMQTTPublish( void );
+
+/**
+ * @brief Unsubscribes from the mqttexampleTOPIC topic.
+ */
+static void prvMQTTUnsubscribe( void );
+
+/**
+ * @brief Disconnects from the MQTT broker gracefully by sending an MQTT
+ * DISCONNECT message.
+ */
+static void prvMQTTDisconnect( void );
+/*-----------------------------------------------------------*/
+
+static void prvExample_DisconnectCallback( void * pvCallbackContext,
+										   IotMqttCallbackParam_t * pxCallbackParams )
+{
+TaskHandle_t xDemoTaskHandle = ( TaskHandle_t ) pvCallbackContext;
+
+	/* Ensure that we initiated the disconnect. */
+	configASSERT( pxCallbackParams->u.disconnectReason == IOT_MQTT_DISCONNECT_CALLED );
+
+	/* Inform the demo task about the disconnect. */
+	xTaskNotify( xDemoTaskHandle,
+				mqttexampleDISCONNECTED_BIT,
+				eSetBits /* Set the mqttexampleDISCONNECTED_BIT in the demo task's notification value. */
+				);
+}
+/*-----------------------------------------------------------*/
+
+static void prvExample_PublishCallback( void * pvCallbackContext,
+										IotMqttCallbackParam_t * pxCallbackParams )
+{
+TaskHandle_t xDemoTaskHandle = ( TaskHandle_t ) pvCallbackContext;
+
+	/* Ensure that the message is received on the expected topic. */
+	configASSERT( pxCallbackParams->u.message.info.topicNameLength == strlen( mqttexampleTOPIC ) );
+	configASSERT( strncmp( pxCallbackParams->u.message.info.pTopicName,
+						   mqttexampleTOPIC,
+						   strlen( mqttexampleTOPIC ) ) == 0 );
+
+	/* Ensure that the expected message is received. */
+	configASSERT( pxCallbackParams->u.message.info.payloadLength == strlen( mqttexampleMESSAGE ) );
+	configASSERT( strncmp( pxCallbackParams->u.message.info.pPayload,
+						   mqttexampleMESSAGE,
+						   strlen( mqttexampleMESSAGE ) ) == 0 );
+
+	/* Ensure that the message QoS is as expected. */
+	configASSERT( pxCallbackParams->u.message.info.qos == IOT_MQTT_QOS_1 );
+
+	/* Inform the demo task about the message received from the MQTT broker. */
+	xTaskNotify( xDemoTaskHandle,
+				mqttexampleMESSAGE_RECEIVED_BIT,
+				eSetBits /* Set the mqttexampleMESSAGE_RECEIVED_BIT in the demo task's notification value. */
+				);
+}
+/*-----------------------------------------------------------*/
+
+void vStartSimpleMQTTDemo( void )
+{
+	/* This example uses a single application task, which in turn is used to
+	 * connect, subscribe, publish, unsubscribe and disconnect from the MQTT
+	 * broker. */
+	xTaskCreate( prvMQTTDemoTask,			/* Function that implements the task. */
+				 "MQTTDemo",				/* Text name for the task - only used for debugging. */
+				 configMINIMAL_STACK_SIZE,	/* Size of stack (in words, not bytes) to allocate for the task. */
+				 NULL,						/* Task parameter - not used in this case. */
+				 tskIDLE_PRIORITY,			/* Task priority, must be between 0 and configMAX_PRIORITIES - 1. */
+				 NULL );					/* Used to pass out a handle to the created task - not used in this case. */
+}
+/*-----------------------------------------------------------*/
+
+static void prvMQTTDemoTask( void *pvParameters )
+{
+IotMqttError_t xResult;
+uint32_t ulNotificationValue = 0;
+const TickType_t xNoDelay = ( TickType_t ) 0;
+
+	/* Remove compiler warnings about unused parameters. */
+	( void ) pvParameters;
+
+	/* MQTT library must be initialized before it can be used. This is just one
+	 * time initialization. */
+	xResult = IotMqtt_Init();
+	configASSERT( xResult == IOT_MQTT_SUCCESS );
+
+	for( ; ; )
+	{
+		/* Don't expect any notifications to be pending yet. */
+		configASSERT( ulTaskNotifyTake( pdTRUE, xNoDelay ) == 0 );
+
+		/* Establish a connection to the MQTT broker. This example connects to
+		 * the MQTT broker as specified in mqttexampleMQTT_BROKER_ENDPOINT and
+		 * mqttexampleMQTT_BROKER_PORT at the top of this file. Please change
+		 * it to the MQTT broker you want to connect to. Note that this example
+		 * does not use TLS and therefore will not work with AWS IoT. */
+		prvMQTTConnect();
+
+		/* Subscribe to the topic as specified in mqttexampleTOPIC at the top
+		 * of this file. */
+		prvMQTTSubscribe();
+
+		/* Publish a message on the mqttexampleTOPIC topic as specified at the
+		 * top of this file. */
+		prvMQTTPublish();
+
+		/* Since we are subscribed on the same topic, we will get the same
+		 * message back from the MQTT broker. Wait for the message to be
+		 * received which is informed to us by the publish callback
+		 * (prvExample_PublishCallback) by setting the mqttexampleMESSAGE_RECEIVED_BIT
+		 * in this task's notification value. */
+		xTaskNotifyWait( 0UL, /* Don't clear any bits on entry. */
+						 0UL, /* Don't clear any bits on exit. */
+						 &( ulNotificationValue ), /* Obtain the notification value. */
+						 pdMS_TO_TICKS( mqttexampleMQTT_TIMEOUT_MS ) );
+		configASSERT( ( ulNotificationValue & mqttexampleMESSAGE_RECEIVED_BIT ) == mqttexampleMESSAGE_RECEIVED_BIT );
+
+		/* Unsubscribe from the topic mqttexampleTOPIC. */
+		prvMQTTUnsubscribe();
+
+		/* Gracefully disconnect from the MQTT broker by sending an MQTT
+		 * DISCONNECT message. */
+		prvMQTTDisconnect();
+
+		/* Wait for the disconnect operation to complete which is informed to us
+		 * by the disconnect callback (prvExample_DisconnectCallback)by setting
+		 * the mqttexampleDISCONNECTED_BIT in this task's notification value.
+		 * Note that all bits are cleared in the task's notification value to
+		 * ensure that it is ready for the next run. */
+		xTaskNotifyWait( 0UL, /* Don't clear any bits on entry. */
+						 portMAX_DELAY, /* Clear all bits on exit - portMAX_DELAY is used as it is a portable way of having all bits set. */
+						 &( ulNotificationValue ), /* Obtain the notification value. */
+						 pdMS_TO_TICKS( mqttexampleMQTT_TIMEOUT_MS ) );
+		configASSERT( ( ulNotificationValue & mqttexampleDISCONNECTED_BIT ) == mqttexampleDISCONNECTED_BIT );
+	}
+}
+/*-----------------------------------------------------------*/
+
+static void prvMQTTConnect( void )
+{
+IotMqttError_t xResult;
+IotNetworkServerInfo_t xMQTTBrokerInfo;
+IotMqttNetworkInfo_t xNetworkInfo = IOT_MQTT_NETWORK_INFO_INITIALIZER;
+IotMqttConnectInfo_t xConnectInfo = IOT_MQTT_CONNECT_INFO_INITIALIZER;
+
+	/******************* Broker information setup. **********************/
+	xMQTTBrokerInfo.pHostName = mqttexampleMQTT_BROKER_ENDPOINT;
+	xMQTTBrokerInfo.port = mqttexampleMQTT_BROKER_PORT;
+
+	/******************* Network information setup. **********************/
+	/* No connection to the MQTT broker has been established yet and we want to
+	 * establish a new connection. */
+	xNetworkInfo.createNetworkConnection = true;
+	xNetworkInfo.u.setup.pNetworkServerInfo = &( xMQTTBrokerInfo );
+
+	/* This example does not use TLS and therefore pNetworkCredentialInfo must
+	 * be set to NULL. */
+	xNetworkInfo.u.setup.pNetworkCredentialInfo = NULL;
+
+	/* Use FreeRTOS+TCP network. */
+	xNetworkInfo.pNetworkInterface = IOT_NETWORK_INTERFACE_AFR;
+
+	/* Setup the callback which is called when the MQTT connection is disconnected. */
+	xNetworkInfo.disconnectCallback.pCallbackContext = ( void * ) xTaskGetCurrentTaskHandle();
+	xNetworkInfo.disconnectCallback.function = prvExample_DisconnectCallback;
+
+	/****************** MQTT Connection information setup. ********************/
+	/* This example does not use TLS and therefore won't work with AWS IoT. */
+	xConnectInfo.awsIotMqttMode = false;
+
+	/* Start with a clean session i.e. direct the MQTT broker to discard any
+	 * previous session data. Also, establishing a connection with clean session
+	 * will ensure that the broker does not store any data when this client
+	 * gets disconnected. */
+	xConnectInfo.cleanSession = true;
+
+	/* Since we are starting with a clean session, there are no previous
+	 * subscriptions to be restored. */
+	xConnectInfo.pPreviousSubscriptions = NULL;
+	xConnectInfo.previousSubscriptionCount = 0;
+
+	/* We do not want to publish Last Will and Testament (LWT) message if the
+	 * client gets disconnected. */
+	xConnectInfo.pWillInfo = NULL;
+
+	/* Send an MQTT PING request every minute. */
+	xConnectInfo.keepAliveSeconds = mqttexampleKEEP_ALIVE_SECONDS;
+
+	/* The client identifier is used to uniquely identify this MQTT client to
+	 * the MQTT broker. */
+	xConnectInfo.pClientIdentifier = mqttexampleCLIENT_IDENTIFIER;
+	xConnectInfo.clientIdentifierLength = ( uint16_t ) strlen( mqttexampleCLIENT_IDENTIFIER );
+
+	/* This example does not use any authentication and therefore username and
+	 * password fields are not used. */
+	xConnectInfo.pUserName = NULL;
+	xConnectInfo.userNameLength = 0;
+	xConnectInfo.pPassword = NULL;
+	xConnectInfo.passwordLength = 0;
+
+	/* Establish the connection to the MQTT broker - It is a blocking call and
+	will return only when connection is complete. */
+	xResult = IotMqtt_Connect( &( xNetworkInfo ),
+							   &( xConnectInfo ),
+							   mqttexampleMQTT_TIMEOUT_MS,
+							   &( xMQTTConnection ) );
+	configASSERT( xResult == IOT_MQTT_SUCCESS );
+}
+/*-----------------------------------------------------------*/
+
+static void prvMQTTSubscribe( void )
+{
+IotMqttError_t xResult;
+IotMqttSubscription_t xMQTTSubscription;
+
+	/* Subscribe to the mqttexampleTOPIC topic filter. */
+	xMQTTSubscription.qos = IOT_MQTT_QOS_1;
+	xMQTTSubscription.pTopicFilter = mqttexampleTOPIC;
+	xMQTTSubscription.topicFilterLength = ( uint16_t ) strlen( mqttexampleTOPIC );
+	xMQTTSubscription.callback.pCallbackContext = ( void * ) xTaskGetCurrentTaskHandle();
+	xMQTTSubscription.callback.function = prvExample_PublishCallback;
+
+	/* Use the synchronous API to subscribe - It is a blocking call and only
+	 * returns when the subscribe operation is complete. */
+	xResult = IotMqtt_TimedSubscribe( xMQTTConnection,
+									  &( xMQTTSubscription ),
+									  1, /* We are subscribing to one topic filter. */
+									  0, /* flags - currently ignored. */
+									  mqttexampleMQTT_TIMEOUT_MS );
+	configASSERT( xResult == IOT_MQTT_SUCCESS );
+}
+/*-----------------------------------------------------------*/
+
+static void prvMQTTPublish( void )
+{
+IotMqttError_t xResult;
+IotMqttPublishInfo_t xMQTTPublishInfo;
+
+	/* Publish a message with QoS1 on the mqttexampleTOPIC topic. Since we are
+	 * subscribed to the same topic, the MQTT broker will send the same message
+	 * back to us. It is verified in the publish callback. */
+	xMQTTPublishInfo.qos = IOT_MQTT_QOS_1;
+	xMQTTPublishInfo.retain = false;
+	xMQTTPublishInfo.pTopicName = mqttexampleTOPIC;
+	xMQTTPublishInfo.topicNameLength = ( uint16_t ) strlen( mqttexampleTOPIC );
+	xMQTTPublishInfo.pPayload = mqttexampleMESSAGE;
+	xMQTTPublishInfo.payloadLength = strlen( mqttexampleMESSAGE );
+	xMQTTPublishInfo.retryMs = mqttexamplePUBLISH_RETRY_MS;
+	xMQTTPublishInfo.retryLimit = mqttexamplePUBLISH_RETRY_LIMIT;
+
+	/* Use the synchronous API to publish - It is a blocking call and only
+	 * returns when the publish operation is complete. */
+	xResult = IotMqtt_TimedPublish( xMQTTConnection,
+									&( xMQTTPublishInfo ),
+									0, /* flags - currently ignored. */
+									mqttexampleMQTT_TIMEOUT_MS );
+	configASSERT( xResult == IOT_MQTT_SUCCESS );
+}
+/*-----------------------------------------------------------*/
+
+static void prvMQTTUnsubscribe( void )
+{
+IotMqttError_t xResult;
+IotMqttSubscription_t xMQTTSubscription;
+
+	/* Unsubscribe from the mqttexampleTOPIC topic filter. */
+	xMQTTSubscription.pTopicFilter = mqttexampleTOPIC;
+	xMQTTSubscription.topicFilterLength = ( uint16_t ) strlen( mqttexampleTOPIC );
+	/* The following members of the IotMqttSubscription_t are ignored by the
+	 * unsubscribe operation. Just initialize them to avoid "use of uninitialized
+	 * variable" warnings. */
+	xMQTTSubscription.qos = IOT_MQTT_QOS_1;
+	xMQTTSubscription.callback.pCallbackContext = NULL;
+	xMQTTSubscription.callback.function = NULL;
+
+	/* Use the synchronous API to unsubscribe - It is a blocking call and only
+	 * returns when the unsubscribe operation is complete. */
+	xResult = IotMqtt_TimedUnsubscribe( xMQTTConnection,
+										&( xMQTTSubscription ),
+										1, /* We are unsubscribing from one topic filter. */
+										0, /* flags - currently ignored. */
+										mqttexampleMQTT_TIMEOUT_MS );
+	configASSERT( xResult == IOT_MQTT_SUCCESS );
+}
+/*-----------------------------------------------------------*/
+
+static void prvMQTTDisconnect( void )
+{
+	/* Send a MQTT DISCONNECT packet to the MQTT broker to do a graceful
+	 * disconnect. */
+	IotMqtt_Disconnect( xMQTTConnection,
+						0 /* flags - 0 means a graceful disconnect by sending MQTT DISCONNECT. */
+						);
+}
+/*-----------------------------------------------------------*/
diff --git a/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/DemoTasks/SimpleTaskPoolExamples.c b/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/DemoTasks/SimpleTaskPoolExamples.c
deleted file mode 100644
index 49924537e..000000000
--- a/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/DemoTasks/SimpleTaskPoolExamples.c
+++ /dev/null
@@ -1,599 +0,0 @@
-/*
- * FreeRTOS Kernel V10.2.1
- * Copyright (C) 2017 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
- * the Software, and to permit persons to whom the Software is furnished to do so,
- * subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
- * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
- * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- * http://www.FreeRTOS.org
- * http://aws.amazon.com/freertos
- *
- * 1 tab == 4 spaces!
- */
-
-//_RB_ Add link to docs here.
-
-/* Kernel includes. */
-#include "FreeRTOS.h"
-#include "task.h"
-
-/* Standard includes. */
-#include <stdio.h>
-
-/* IoT SDK includes. */
-#include "iot_taskpool.h"
-
-/* The priority at which that tasks in the task pool (the worker tasks) get
-created. */
-#define tpTASK_POOL_WORKER_PRIORITY		1
-
-/* The number of jobs created in the example functions that create more than
-one job. */
-#define tpJOBS_TO_CREATE	5
-
-/*
- * Prototypes for the functions that demonstrate the task pool API.
- * See the implementation of the prvTaskPoolDemoTask() function within this file
- * for a description of the individual functions.  A configASSERT() is hit if
- * any of the demos encounter any unexpected behaviour.
- */
-static void prvExample_BasicSingleJob( void );
-static void prvExample_DeferredJobAndCancellingJobs( void );
-static void prvExample_BasicRecyclableJob( void );
-static void prvExample_ReuseRecyclableJobFromLowPriorityTask( void );
-static void prvExample_ReuseRecyclableJobFromHighPriorityTask( void );
-
-/*
- * Prototypes of the callback functions used in the examples.  The callback
- * simply sends a signal (in the form of a direct task notification) to the
- * prvTaskPoolDemoTask() task to let the task know that the callback execute.
- * The handle of the prvTaskPoolDemoTask() task is not accessed directly, but
- * instead passed into the task pool job as the job's context.
- */
-static void prvSimpleTaskNotifyCallback( IotTaskPool_t pTaskPool, IotTaskPoolJob_t pJob, void *pUserContext );
-
-/*
- * The task used to demonstrate the task pool API.  This task just loops through
- * each demo in turn.
- */
-static void prvTaskPoolDemoTask( void *pvParameters );
-
-/*-----------------------------------------------------------*/
-
-/* Parameters used to create the system task pool - see TBD for more information
-as the task pool used in this example is a slimmed down version of the full
-library - the slimmed down version being intended specifically for FreeRTOS
-kernel use cases. */
-static const IotTaskPoolInfo_t xTaskPoolParameters = {
-														/* Minimum number of threads in a task pool.
-														Note the slimmed down version of the task
-														pool used by this library does not autoscale
-														the number of tasks in the pool so in this
-														case this sets the number of tasks in the
-														pool. */
-														2,
-														/* Maximum number of threads in a task pool.
-														Note the slimmed down version of the task
-														pool used by this library does not autoscale
-														the number of tasks in the pool so in this
-														case this parameter is just ignored. */
-														2,
-														/* Stack size for every task pool thread - in
-														bytes, hence multiplying by the number of bytes
-														in a word as configMINIMAL_STACK_SIZE is
-														specified in words. */
-														configMINIMAL_STACK_SIZE * sizeof( portSTACK_TYPE ),
-														/* Priority for every task pool thread. */
-														tpTASK_POOL_WORKER_PRIORITY,
-													 };
-
-/*-----------------------------------------------------------*/
-
-void vStartSimpleTaskPoolDemo( void )
-{
-	/* This example uses a single application task, which in turn is used to
-	create and send jobs to task pool tasks. */
-	xTaskCreate( prvTaskPoolDemoTask,		/* Function that implements the task. */
-				 "PoolDemo",				/* Text name for the task - only used for debugging. */
-				 configMINIMAL_STACK_SIZE,	/* Size of stack (in words, not bytes) to allocate for the task. */
-				 NULL,						/* Task parameter - not used in this case. */
-				 tskIDLE_PRIORITY,			/* Task priority, must be between 0 and configMAX_PRIORITIES - 1. */
-				 NULL );					/* Used to pass out a handle to the created tsak - not used in this case. */
-}
-/*-----------------------------------------------------------*/
-
-static void prvTaskPoolDemoTask( void *pvParameters )
-{
-IotTaskPoolError_t xResult;
-uint32_t ulLoops = 0;
-
-	/* Remove compiler warnings about unused parameters. */
-	( void ) pvParameters;
-
-	/* The task pool must be created before it can be used.  The system task
-	pool is the task pool managed by the task pool library itself - the storage
-	used by the task pool is provided by the library. */
-	xResult = IotTaskPool_CreateSystemTaskPool( &xTaskPoolParameters );
-	configASSERT( xResult == IOT_TASKPOOL_SUCCESS );
-
-	/* Attempting to create the task pool again should then appear to succeed
-	(in case it is initialised by more than one library), but have no effect. */
-	xResult = IotTaskPool_CreateSystemTaskPool( &xTaskPoolParameters );
-	configASSERT( xResult == IOT_TASKPOOL_SUCCESS );
-
-	for( ;; )
-	{
-		/* Demonstrate the most basic use case where a non persistent job is
-		created and scheduled to run immediately.  The task pool worker tasks
-		(in which the job callback function executes) have a priority above the
-		priority of this task so the job's callback executes as soon as it is
-		scheduled. */
-		prvExample_BasicSingleJob();
-
-		/* Demonstrate a job being scheduled to run at some time in the
-		future, and how a job scheduled to run in the future can be cancelled if
-		it has not yet started executing.  */
-		prvExample_DeferredJobAndCancellingJobs();
-
-		/* Demonstrate the most basic use of a recyclable job.  This is similar
-		to prvExample_BasicSingleJob() but using a recyclable job.  Creating a
-		recyclable job will re-use a previously created and now spare job from
-		the task pool's job cache if one is available, or otherwise dynamically
-		create a new job if a spare job is not available in the cache but space
-		remains in the cache. */
-		prvExample_BasicRecyclableJob();
-
-		/* Demonstrate multiple recyclable jobs being created, used, and then
-		re-used.  In this the task pool worker tasks (in which the job callback
-		functions execute) have a priority above the priority of this task so
-		the job's callback functions execute as soon as they are scheduled. */
-		prvExample_ReuseRecyclableJobFromLowPriorityTask();
-
-		/* Again demonstrate multiple recyclable jobs being used, but this time
-		the priority of the task pool worker tasks (in which the job callback
-		functions execute) are lower than the priority of this task so the job's
-		callback functions don't execute until this task enteres the blocked
-		state. */
-		prvExample_ReuseRecyclableJobFromHighPriorityTask();
-
-		ulLoops++;
-		if( ( ulLoops % 10UL ) == 0 )
-		{
-			printf( "prvTaskPoolDemoTask() performed %u iterations without hitting an assert.\r\n", ulLoops );
-			fflush( stdout );
-		}
-	}
-}
-/*-----------------------------------------------------------*/
-
-static void prvSimpleTaskNotifyCallback( IotTaskPool_t pTaskPool, IotTaskPoolJob_t pJob, void *pUserContext )
-{
-/* The jobs context is the handle of the task to which a notification should
-be sent. */
-TaskHandle_t xTaskToNotify = ( TaskHandle_t ) pUserContext;
-
-	/* Remove warnings about unused parameters. */
-	( void ) pTaskPool;
-	( void ) pJob;
-
-	/* Notify the task that created this job. */
-	xTaskNotifyGive( xTaskToNotify );
-}
-/*-----------------------------------------------------------*/
-
-static void prvExample_BasicSingleJob( void )
-{
-IotTaskPoolJobStorage_t xJobStorage;
-IotTaskPoolJob_t xJob;
-IotTaskPoolError_t xResult;
-uint32_t ulReturn;
-const uint32_t ulNoFlags = 0UL;
-const TickType_t xNoDelay = ( TickType_t ) 0;
-size_t xFreeHeapBeforeCreatingJob = xPortGetFreeHeapSize();
-IotTaskPoolJobStatus_t xJobStatus;
-
-	/* Don't expect any notifications to be pending yet. */
-	configASSERT( ulTaskNotifyTake( pdTRUE, 0 ) == 0 );
-
-	/* Create and schedule a job using the handle of this task as the job's
-	context and the function that sends a notification to the task handle as
-	the jobs callback function.  This is not a recyclable job so the storage
-	required to hold information about the job is provided by this task - in
-	this case the storage is on the stack of this task so no memory is allocated
-	dynamically but the stack frame must remain in scope for the lifetime of
-	the job. */
-	xResult = IotTaskPool_CreateJob(  prvSimpleTaskNotifyCallback, /* Callback function. */
-									  ( void * ) xTaskGetCurrentTaskHandle(), /* Job context. */
-									  &xJobStorage,
-									  &xJob );
-	configASSERT( xResult == IOT_TASKPOOL_SUCCESS );
-
-	/* The job has been created but not scheduled so is now ready. */
-	IotTaskPool_GetStatus( NULL, xJob, &xJobStatus );
-	configASSERT( xJobStatus == IOT_TASKPOOL_STATUS_READY );
-
-	/* This is not a persistent (recyclable) job and its storage is on the
-	stack of this function, so the amount of heap space available should not
-	have chanced since entering this function. */
-	configASSERT( xFreeHeapBeforeCreatingJob == xPortGetFreeHeapSize() );
-
-	/* In the full task pool implementation the first parameter is used to
-	pass the handle of the task pool to schedule.  The lean task pool
-	implementation used in this demo only supports a single task pool, which
-	is created internally within the library, so the first parameter is NULL. */
-	xResult = IotTaskPool_Schedule( NULL, xJob, ulNoFlags );
-	configASSERT( xResult == IOT_TASKPOOL_SUCCESS );
-
-	/* Look for the notification coming from the job's callback function.  The
-	priority of the task pool worker task that executes the callback is higher
-	than the priority of this task so a block time is not needed - the task pool
-	worker task	pre-empts this task and sends the notification (from the job's
-	callback) as soon as the job is scheduled. */
-	ulReturn = ulTaskNotifyTake( pdTRUE, xNoDelay );
-	configASSERT( ulReturn );
-
-	/* The job's callback has executed so the job has now completed. */
-	IotTaskPool_GetStatus( NULL, xJob, &xJobStatus );
-	configASSERT( xJobStatus == IOT_TASKPOOL_STATUS_COMPLETED );
-}
-/*-----------------------------------------------------------*/
-
-static void prvExample_DeferredJobAndCancellingJobs( void )
-{
-IotTaskPoolJobStorage_t xJobStorage;
-IotTaskPoolJob_t xJob;
-IotTaskPoolError_t xResult;
-uint32_t ulReturn;
-const uint32_t ulShortDelay_ms = 100UL;
-const TickType_t xNoDelay = ( TickType_t ) 0, xAllowableMargin = ( TickType_t ) 5; /* Large margin for Windows port, which is not real time. */
-TickType_t xTimeBefore, xElapsedTime, xShortDelay_ticks;
-size_t xFreeHeapBeforeCreatingJob = xPortGetFreeHeapSize();
-IotTaskPoolJobStatus_t xJobStatus;
-
-	/* Don't expect any notifications to be pending yet. */
-	configASSERT( ulTaskNotifyTake( pdTRUE, 0 ) == 0 );
-
-	/* Create a job using the handle of this task as the job's context and the
-	function that sends a notification to the task handle as the jobs callback
-	function.  The job is created using storage allocated on the stack of this
-	function - so no memory is allocated. */
-	xResult = IotTaskPool_CreateJob(  prvSimpleTaskNotifyCallback, /* Callback function. */
-									  ( void * ) xTaskGetCurrentTaskHandle(), /* Job context. */
-									  &xJobStorage,
-									  &xJob );
-	configASSERT( xResult == IOT_TASKPOOL_SUCCESS );
-
-	/* The job has been created but not scheduled so is now ready. */
-	IotTaskPool_GetStatus( NULL, xJob, &xJobStatus );
-	configASSERT( xJobStatus == IOT_TASKPOOL_STATUS_READY );
-
-	/* This is not a persistent (recyclable) job and its storage is on the
-	stack of this function, so the amount of heap space available should not
-	have chanced since entering this function. */
-	configASSERT( xFreeHeapBeforeCreatingJob == xPortGetFreeHeapSize() );
-
-	/* Schedule the job to run its callback in xShortDelay_ms milliseconds time.
-	In the full task pool implementation the first parameter is used to	pass the
-	handle of the task pool to schedule.  The lean task pool implementation used
-	in this demo only supports a single task pool, which is created internally
-	within the library, so the first parameter is NULL. */
-	xResult = IotTaskPool_ScheduleDeferred( NULL, xJob, ulShortDelay_ms );
-	configASSERT( xResult == IOT_TASKPOOL_SUCCESS );
-
-	/* The scheduled job should not have executed yet, so don't expect any
-	notifications and expect the job's status to be 'deferred'. */
-	ulReturn = ulTaskNotifyTake( pdTRUE, xNoDelay );
-	configASSERT( ulReturn == 0 );
-	IotTaskPool_GetStatus( NULL, xJob, &xJobStatus );
-	configASSERT( xJobStatus == IOT_TASKPOOL_STATUS_DEFERRED );
-
-	/* As the job has not yet been executed it can be stopped. */
-	xResult = IotTaskPool_TryCancel( NULL, xJob, &xJobStatus );
-	configASSERT( xResult == IOT_TASKPOOL_SUCCESS );
-	IotTaskPool_GetStatus( NULL, xJob, &xJobStatus );
-	configASSERT( xJobStatus == IOT_TASKPOOL_STATUS_CANCELED );
-
-	/* Schedule the job again, and this time wait until its callback is
-	executed (the callback function sends a notification to this task) to see
-	that it executes at the right time. */
-	xTimeBefore = xTaskGetTickCount();
-	xResult = IotTaskPool_ScheduleDeferred( NULL, xJob, ulShortDelay_ms );
-	configASSERT( xResult == IOT_TASKPOOL_SUCCESS );
-
-	/* Wait twice the deferred execution time to ensure the callback is executed
-	before the call below times out. */
-	ulReturn = ulTaskNotifyTake( pdTRUE, pdMS_TO_TICKS( ulShortDelay_ms * 2UL ) );
-	xElapsedTime = xTaskGetTickCount() - xTimeBefore;
-
-	/* A single notification should not have been received... */
-	configASSERT( ulReturn == 1 );
-
-	/* ...and the time since scheduling the job should be greater than or
-	equal to the deferred execution time - which is converted to ticks for
-	comparison. */
-	xShortDelay_ticks = pdMS_TO_TICKS( ulShortDelay_ms );
-	configASSERT( ( xElapsedTime >= xShortDelay_ticks ) && ( xElapsedTime  < ( xShortDelay_ticks + xAllowableMargin ) ) );
-}
-/*-----------------------------------------------------------*/
-
-static void prvExample_BasicRecyclableJob( void )
-{
-IotTaskPoolJob_t xJob;
-IotTaskPoolError_t xResult;
-uint32_t ulReturn;
-const uint32_t ulNoFlags = 0UL;
-const TickType_t xNoDelay = ( TickType_t ) 0;
-size_t xFreeHeapBeforeCreatingJob = xPortGetFreeHeapSize();
-
-	/* Don't expect any notifications to be pending yet. */
-	configASSERT( ulTaskNotifyTake( pdTRUE, 0 ) == 0 );
-
-	/* Create and schedule a job using the handle of this task as the job's
-	context and the function that sends a notification to the task handle as
-	the jobs callback function.  The job is created as a recyclable job and in
-	this case the memory used to hold the job status is allocated inside the
-	create function.  As the job is persistent it can be used multiple times,
-	as demonstrated in other examples within this demo.  In the full task pool
-	implementation the first parameter is used to pass the handle of the task
-	pool this recyclable job is to be associated with.  In the lean
-	implementation of the task pool used by this demo there	is only one task
-	pool (the system task pool created within the task pool library) so the
-	first parameter is NULL. */
-	xResult = IotTaskPool_CreateRecyclableJob( NULL,
-											   prvSimpleTaskNotifyCallback,
-											   (void * ) xTaskGetCurrentTaskHandle(),
-											   &xJob );
-	configASSERT( xResult == IOT_TASKPOOL_SUCCESS );
-
-	/* This recyclable job is persistent, and in this case created dynamically,
-	so expect there to be less heap space then when entering the function. */
-	configASSERT( xPortGetFreeHeapSize() < xFreeHeapBeforeCreatingJob );
-
-	/* In the full task pool implementation the first parameter is used to
-	pass the handle of the task pool to schedule.  The lean task pool
-	implementation used in this demo only supports a single task pool, which
-	is created internally within the library, so the first parameter is NULL. */
-	xResult = IotTaskPool_Schedule( NULL, xJob, ulNoFlags );
-	configASSERT( xResult == IOT_TASKPOOL_SUCCESS );
-
-	/* Look for the notification coming from the job's callback function.  The
-	priority of the task pool worker task that executes the callback is higher
-	than the priority of this task so a block time is not needed - the task pool
-	worker task	pre-empts this task and sends the notification (from the job's
-	callback) as soon as the job is scheduled. */
-	ulReturn = ulTaskNotifyTake( pdTRUE, xNoDelay );
-	configASSERT( ulReturn );
-
-	/* Clean up recyclable job.  In the full implementation of the task pool
-	the first parameter is used to pass a handle to the task pool the job is
-	associated with.  In the lean implementation of the task pool used by this
-	demo there is only one task pool (the system task pool created in the
-	task pool library itself) so the first parameter is NULL. */
-	IotTaskPool_DestroyRecyclableJob( NULL, xJob );
-
-	/* Once the job has been deleted the memory used to hold the job is
-	returned, so the available heap should be exactly as when entering this
-	function. */
-	configASSERT( xPortGetFreeHeapSize() == xFreeHeapBeforeCreatingJob );
-}
-/*-----------------------------------------------------------*/
-
-static void prvExample_ReuseRecyclableJobFromLowPriorityTask( void )
-{
-IotTaskPoolError_t xResult;
-uint32_t x, xIndex, ulNotificationValue;
-const uint32_t ulNoFlags = 0UL;
-IotTaskPoolJob_t xJobs[ tpJOBS_TO_CREATE ];
-size_t xFreeHeapBeforeCreatingJob = xPortGetFreeHeapSize();
-IotTaskPoolJobStatus_t xJobStatus;
-
-	/* Don't expect any notifications to be pending yet. */
-	configASSERT( ulTaskNotifyTake( pdTRUE, 0 ) == 0 );
-
-	/* Create tpJOBS_TO_CREATE jobs using the handle of this task as the job's
-	context and the function that sends a notification to the task handle as
-	the jobs callback function.  The jobs are created as a recyclable job and
-	in this case the memory to store the job information is allocated within
-	the create function as at this time there are no recyclable jobs in the
-	task pool jobs cache. As the jobs are persistent they can be used multiple
-	times.  In the full task pool implementation the first parameter is used to
-	pass the handle of the task pool this recyclable job is to be associated
-	with.  In the lean implementation of the task pool used by this demo there
-	is only one task pool (the system task pool created within the task pool
-	library) so the first parameter is NULL. */
-	for( x = 0; x < tpJOBS_TO_CREATE; x++ )
-	{
-		xResult = IotTaskPool_CreateRecyclableJob( NULL,
-												   prvSimpleTaskNotifyCallback,
-												   (void * ) xTaskGetCurrentTaskHandle(),
-												   &( xJobs[ x ] ) );
-		configASSERT( xResult == IOT_TASKPOOL_SUCCESS );
-
-		/* The job has been created but not scheduled so is now ready. */
-		IotTaskPool_GetStatus( NULL, xJobs[ x ], &xJobStatus );
-		configASSERT( xJobStatus == IOT_TASKPOOL_STATUS_READY );
-	}
-
-	/* Demonstrate that the jobs can be recycled by performing twice the number
-	of iterations of scheduling jobs than there actually are created jobs.  This
-	works because the task pool task priorities are above the priority of this
-	task, so the tasks that run the jobs pre-empt this task as soon as a job is
-	ready. */
-	for( x = 0; x < ( tpJOBS_TO_CREATE * 2UL ); x++ )
-	{
-		/* Make sure array index does not go out of bounds. */
-		xIndex = x % tpJOBS_TO_CREATE;
-
-		xResult = IotTaskPool_Schedule( NULL, xJobs[ xIndex ], ulNoFlags );
-		configASSERT( xResult == IOT_TASKPOOL_SUCCESS );
-
-		/* The priority of the task pool task(s) is higher than the priority
-		of this task, so the job's callback function should have already
-		executed, sending a notification to this task, and incrementing this
-		task's notification value. */
-		xTaskNotifyWait( 0UL, /* Don't clear any bits on entry. */
-						 0UL, /* Don't clear any bits on exit. */
-						 &ulNotificationValue, /* Obtain the notification value. */
-						 0UL ); /* No block time, return immediately. */
-		configASSERT( ulNotificationValue == ( x + 1 ) );
-
-		/* The job's callback has executed so the job is now completed. */
-		IotTaskPool_GetStatus( NULL, xJobs[ xIndex ], &xJobStatus );
-		configASSERT( xJobStatus == IOT_TASKPOOL_STATUS_COMPLETED );
-
-		/* To leave the list of jobs empty we can stop re-creating jobs half
-		way through iterations of this loop. */
-		if( x < tpJOBS_TO_CREATE )
-		{
-			/* Recycle the job so it can be used again.  In the full task pool
-			implementation the first parameter is used to pass the handle of the
-			task pool this job will be associated with.  In this lean task pool
-			implementation only the system task pool exists (the task pool created
-			internally to the task pool library) so the first parameter is just
-			passed as NULL. *//*_RB_ Why not recycle it automatically? */
-			IotTaskPool_RecycleJob( NULL, xJobs[ xIndex ] );
-			xResult = IotTaskPool_CreateRecyclableJob( NULL,
-													   prvSimpleTaskNotifyCallback,
-													   (void * ) xTaskGetCurrentTaskHandle(),
-													   &( xJobs[ xIndex ] ) );
-			configASSERT( xResult == IOT_TASKPOOL_SUCCESS );
-		}
-	}
-
-	/* Clear all the notification value bits again. */
-	xTaskNotifyWait( portMAX_DELAY, /* Clear all bits on entry - portMAX_DELAY is used as it is a portable way of having all bits set. */
-					 0UL, /* Don't clear any bits on exit. */
-					 NULL, /* Don't need the notification value this time. */
-					 0UL ); /* No block time, return immediately. */
-	configASSERT( ulTaskNotifyTake( pdTRUE, 0 ) == 0 );
-
-	/* Clean up all the recyclable job.  In the full implementation of the task
-	pool the first parameter is used to pass a handle to the task pool the job
-	is associated with.  In the lean implementation of the task pool used by
-	this demo there is only one task pool (the system task pool created in the
-	task pool library itself) so the first parameter is NULL. */
-	for( x = 0; x < tpJOBS_TO_CREATE; x++ )
-	{
-		xResult = IotTaskPool_DestroyRecyclableJob( NULL, xJobs[ x ] );
-		configASSERT( xResult == IOT_TASKPOOL_SUCCESS );
-	}
-
-	/* Once the job has been deleted the memory used to hold the job is
-	returned, so the available heap should be exactly as when entering this
-	function. */
-	configASSERT( xPortGetFreeHeapSize() == xFreeHeapBeforeCreatingJob );
-}
-/*-----------------------------------------------------------*/
-
-static void prvExample_ReuseRecyclableJobFromHighPriorityTask( void )
-{
-IotTaskPoolError_t xResult;
-uint32_t x, ulNotificationValue;
-const uint32_t ulNoFlags = 0UL;
-IotTaskPoolJob_t xJobs[ tpJOBS_TO_CREATE ];
-IotTaskPoolJobStorage_t xJobStorage[ tpJOBS_TO_CREATE ];
-size_t xFreeHeapBeforeCreatingJob = xPortGetFreeHeapSize();
-TickType_t xShortDelay = pdMS_TO_TICKS( 150 );
-IotTaskPoolJobStatus_t xJobStatus;
-
-	/* Don't expect any notifications to be pending yet. */
-	configASSERT( ulTaskNotifyTake( pdTRUE, 0 ) == 0 );
-
-	/* prvExample_ReuseRecyclableJobFromLowPriorityTask() executes in a task
-	that has a lower [task] priority than the task pool's worker tasks.
-	Therefore a talk pool worker preempts the task that calls
-	prvExample_ReuseRecyclableJobFromHighPriorityTask() as soon as the job is
-	scheduled.  prvExample_ReuseRecyclableJobFromHighPriorityTask() reverses the
-	priorities - prvExample_ReuseRecyclableJobFromHighPriorityTask() raises its
-	priority to above the task pool's worker tasks, so the worker tasks do not
-	execute until the calling task enters the blocked state.  First raise the
-	priority - passing NULL means raise the priority of the calling task. */
-	vTaskPrioritySet( NULL, tpTASK_POOL_WORKER_PRIORITY + 1 );
-
-	/* Create tpJOBS_TO_CREATE jobs using the handle of this task as the job's
-	context and the function that sends a notification to the task handle as
-	the jobs callback function. */
-	for( x = 0; x < tpJOBS_TO_CREATE; x++ )
-	{
-		xResult = IotTaskPool_CreateJob(  prvSimpleTaskNotifyCallback, /* Callback function. */
-										  ( void * ) xTaskGetCurrentTaskHandle(), /* Job context. */
-										  &( xJobStorage[ x ] ),
-										  &( xJobs[ x ] ) );
-		configASSERT( xResult == IOT_TASKPOOL_SUCCESS );
-
-		/* This is not a persistent (recyclable) job and its storage is on the
-		stack of this function, so the amount of heap space available should not
-		have chanced since entering this function. */
-		configASSERT( xFreeHeapBeforeCreatingJob == xPortGetFreeHeapSize() );
-	}
-
-	for( x = 0; x < tpJOBS_TO_CREATE; x++ )
-	{
-		/* Schedule the next job. */
-		xResult = IotTaskPool_Schedule( NULL, xJobs[ x ], ulNoFlags );
-		configASSERT( xResult == IOT_TASKPOOL_SUCCESS );
-
-		/* Although scheduled, the job's callback has not executed, so the job
-		reports itself as scheduled. */
-		IotTaskPool_GetStatus( NULL, xJobs[ x ], &xJobStatus );
-		configASSERT( xJobStatus == IOT_TASKPOOL_STATUS_SCHEDULED );
-
-		/* The priority of the task pool task(s) is lower than the priority
-		of this task, so the job's callback function should not have executed
-		yes, so don't expect the notification value for this task to have
-		changed. */
-		xTaskNotifyWait( 0UL, /* Don't clear any bits on entry. */
-						 0UL, /* Don't clear any bits on exit. */
-						 &ulNotificationValue, /* Obtain the notification value. */
-						 0UL ); /* No block time, return immediately. */
-		configASSERT( ulNotificationValue == 0 );
-	}
-
-	/* At this point there are tpJOBS_TO_CREATE scheduled, but none have executed
-	their callbacks because the priority of this task is higher than the
-	priority of the task pool worker threads.  When this task blocks to wait for
-	a notification a worker thread will be able to executes - but as soon as its
-	callback function sends a notification to this task this task will
-	preempt it (because it has a higher priority) so this task only expects to
-	receive one notification at a time. */
-	for( x = 0; x < tpJOBS_TO_CREATE; x++ )
-	{
-		xTaskNotifyWait( 0UL, /* Don't clear any bits on entry. */
-						 0UL, /* Don't clear any bits on exit. */
-						 &ulNotificationValue, /* Obtain the notification value. */
-						 xShortDelay ); /* Short delay to allow a task pool worker to execute. */
-		configASSERT( ulNotificationValue == ( x + 1 ) );
-	}
-
-	/* All the scheduled jobs have now executed, so waiting for another
-	notification should timeout without the notification value changing. */
-	xTaskNotifyWait( 0UL, /* Don't clear any bits on entry. */
-					 0UL, /* Don't clear any bits on exit. */
-					 &ulNotificationValue, /* Obtain the notification value. */
-					 xShortDelay ); /* Short delay to allow a task pool worker to execute. */
-	configASSERT( ulNotificationValue == x );
-
-	/* Reset the priority of this task and clear the notifications ready for the
-	next example. */
-	vTaskPrioritySet( NULL, tskIDLE_PRIORITY );
-	xTaskNotifyWait( portMAX_DELAY, /* Clear all bits on entry - portMAX_DELAY is used as it is a portable way of having all bits set. */
-					 0UL, /* Don't clear any bits on exit. */
-					 NULL, /* Don't need the notification value this time. */
-					 0UL ); /* No block time, return immediately. */
-}
-/*-----------------------------------------------------------*/
-
diff --git a/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/WIN32.vcxproj b/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/WIN32.vcxproj
index 6832fef6b..2c5202e2e 100644
--- a/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/WIN32.vcxproj
+++ b/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/WIN32.vcxproj
@@ -58,7 +58,7 @@
     </Midl>
     <ClCompile>
       <Optimization>Disabled</Optimization>
-      <AdditionalIncludeDirectories>..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\mqtt\include;..\..\..\Source\FreeRTOS-Plus-TCP\include;..\..\..\Source\FreeRTOS-Plus-TCP\portable\BufferManagement;..\..\..\Source\FreeRTOS-Plus-TCP\portable\Compiler\MSVC;.\DemoTasks\include;.\WinPCap;..\..\..\..\FreeRTOS\Source\include;..\..\..\..\FreeRTOS\Source\portable\MSVC-MingW;..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\common\include;..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\include;..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\freertos\include;.;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\mqtt\include;..\..\..\Source\FreeRTOS-Plus-TCP\include;..\..\..\Source\FreeRTOS-Plus-TCP\portable\BufferManagement;..\..\..\Source\FreeRTOS-Plus-TCP\portable\Compiler\MSVC;.\DemoTasks\include;.\WinPCap;..\..\..\..\FreeRTOS\Source\include;..\..\..\..\FreeRTOS\Source\portable\MSVC-MingW;..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\common\include\private;..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\common\include;..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\include;..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\freertos\include;..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\secure_sockets\include;.;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;_WIN32_WINNT=0x0500;WINVER=0x400;_CRT_SECURE_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <MinimalRebuild>true</MinimalRebuild>
       <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
@@ -138,11 +138,6 @@
     </Bscmake>
   </ItemDefinitionGroup>
   <ItemGroup>
-    <ClCompile Include="..\..\..\..\..\..\..\..\..\T\reviews\amazon-freertos-master\libraries\abstractions\platform\freertos\iot_clock_freertos.c" />
-    <ClCompile Include="..\..\..\..\..\..\..\..\..\T\reviews\amazon-freertos-master\libraries\abstractions\platform\freertos\iot_threads_freertos.c" />
-    <ClCompile Include="..\..\..\..\..\..\..\..\..\T\reviews\amazon-freertos-master\libraries\c_sdk\standard\mqtt\src\iot_mqtt_network.c" />
-    <ClCompile Include="..\..\..\..\..\..\..\..\..\T\reviews\amazon-freertos-master\libraries\c_sdk\standard\mqtt\src\iot_mqtt_subscription.c" />
-    <ClCompile Include="..\..\..\..\..\..\..\..\..\T\reviews\amazon-freertos-master\libraries\c_sdk\standard\mqtt\src\iot_mqtt_validate.c" />
     <ClCompile Include="..\..\..\..\FreeRTOS\Source\event_groups.c" />
     <ClCompile Include="..\..\..\..\FreeRTOS\Source\list.c" />
     <ClCompile Include="..\..\..\..\FreeRTOS\Source\portable\MemMang\heap_4.c" />
@@ -150,11 +145,18 @@
     <ClCompile Include="..\..\..\..\FreeRTOS\Source\queue.c" />
     <ClCompile Include="..\..\..\..\FreeRTOS\Source\tasks.c" />
     <ClCompile Include="..\..\..\..\FreeRTOS\Source\timers.c" />
+    <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\freertos\iot_clock_freertos.c" />
+    <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\freertos\iot_network_freertos.c" />
+    <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\freertos\iot_threads_freertos.c" />
+    <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\secure_sockets\freertos_plus_tcp\iot_secure_sockets.c" />
     <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\common\logging\iot_logging.c" />
     <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\common\taskpool\iot_taskpool.c" />
     <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\mqtt\src\iot_mqtt_api.c" />
+    <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\mqtt\src\iot_mqtt_network.c" />
     <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\mqtt\src\iot_mqtt_operation.c" />
     <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\mqtt\src\iot_mqtt_serialize.c" />
+    <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\mqtt\src\iot_mqtt_subscription.c" />
+    <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\mqtt\src\iot_mqtt_validate.c" />
     <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-TCP\FreeRTOS_ARP.c" />
     <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-TCP\FreeRTOS_DHCP.c" />
     <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-TCP\FreeRTOS_DNS.c" />
@@ -166,7 +168,7 @@
     <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-TCP\FreeRTOS_UDP_IP.c" />
     <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-TCP\portable\BufferManagement\BufferAllocation_2.c" />
     <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-TCP\portable\NetworkInterface\WinPCap\NetworkInterface.c" />
-    <ClCompile Include="DemoTasks\SimpleTaskPoolExamples.c" />
+    <ClCompile Include="DemoTasks\SimpleMQTTExamples.c" />
     <ClCompile Include="DemoTasks\SimpleUDPClientAndServer.c" />
     <ClCompile Include="demo_logging.c" />
     <ClCompile Include="main.c">
@@ -185,10 +187,18 @@
     <ClInclude Include="..\..\..\..\FreeRTOS\Source\include\task.h" />
     <ClInclude Include="..\..\..\..\FreeRTOS\Source\include\timers.h" />
     <ClInclude Include="..\..\..\..\FreeRTOS\Source\portable\MSVC-MingW\portmacro.h" />
-    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\freertos\include\platform\iot_platform_types_afr.h" />
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\freertos\include\platform\iot_platform_types_freertos.h" />
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\include\platform\iot_clock.h" />
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\include\platform\iot_metrics.h" />
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\include\platform\iot_network.h" />
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\include\platform\iot_threads.h" />
     <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\include\types\iot_platform_types.h" />
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\secure_sockets\include\iot_secure_sockets.h" />
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\secure_sockets\include\iot_secure_sockets_config_defaults.h" />
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\secure_sockets\include\iot_secure_sockets_wrapper_metrics.h" />
     <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\common\include\iot_taskpool.h" />
     <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\common\include\private\iot_error.h" />
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\common\include\private\iot_lib_init.h" />
     <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\common\include\private\iot_logging.h" />
     <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\common\include\private\iot_static_memory.h" />
     <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\common\include\private\iot_taskpool_internal.h" />
diff --git a/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/WIN32.vcxproj.filters b/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/WIN32.vcxproj.filters
index e60132cea..4ef425d1f 100644
--- a/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/WIN32.vcxproj.filters
+++ b/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/WIN32.vcxproj.filters
@@ -78,9 +78,6 @@
     <Filter Include="FreeRTOS+\FreeRTOS IoT Libraries\abstractions\platform\freertos\include\platform">
       <UniqueIdentifier>{bdcbc1ec-99b8-4c72-9075-49035c115488}</UniqueIdentifier>
     </Filter>
-    <Filter Include="FreeRTOS+\FreeRTOS IoT Libraries\abstractions\platform\freertos\include\platform\types">
-      <UniqueIdentifier>{35ce7745-52a2-4220-be31-50dfaa35c0ab}</UniqueIdentifier>
-    </Filter>
     <Filter Include="FreeRTOS+\FreeRTOS IoT Libraries\standard\mqtt">
       <UniqueIdentifier>{2d17d5e6-ed70-4e42-9693-f7a63baf4948}</UniqueIdentifier>
     </Filter>
@@ -96,6 +93,15 @@
     <Filter Include="FreeRTOS+\FreeRTOS IoT Libraries\standard\common\logging">
       <UniqueIdentifier>{1943ad1a-a367-4ef5-ab65-1313801e6327}</UniqueIdentifier>
     </Filter>
+    <Filter Include="FreeRTOS+\FreeRTOS IoT Libraries\abstractions\secure_sockets">
+      <UniqueIdentifier>{9a82e058-c6c5-4da5-817e-a28c5137749b}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="FreeRTOS+\FreeRTOS IoT Libraries\abstractions\secure_sockets\include">
+      <UniqueIdentifier>{cf6813fa-76cf-4e4d-86f7-18f1ae92ad44}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="FreeRTOS+\FreeRTOS IoT Libraries\abstractions\secure_sockets\freertos_plus_tcp">
+      <UniqueIdentifier>{79ebfd9f-45cb-4a3b-8c73-73f9d9fe7984}</UniqueIdentifier>
+    </Filter>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\..\..\..\FreeRTOS\Source\portable\MSVC-MingW\port.c">
@@ -160,9 +166,6 @@
     <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\common\taskpool\iot_taskpool.c">
       <Filter>FreeRTOS+\FreeRTOS IoT Libraries\standard\common\task_pool</Filter>
     </ClCompile>
-    <ClCompile Include="DemoTasks\SimpleTaskPoolExamples.c">
-      <Filter>DemoTasks</Filter>
-    </ClCompile>
     <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\mqtt\src\iot_mqtt_api.c">
       <Filter>FreeRTOS+\FreeRTOS IoT Libraries\standard\mqtt\src</Filter>
     </ClCompile>
@@ -172,22 +175,31 @@
     <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\mqtt\src\iot_mqtt_serialize.c">
       <Filter>FreeRTOS+\FreeRTOS IoT Libraries\standard\mqtt\src</Filter>
     </ClCompile>
-    <ClCompile Include="..\..\..\..\..\..\..\..\..\T\reviews\amazon-freertos-master\libraries\c_sdk\standard\mqtt\src\iot_mqtt_network.c">
+    <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\common\logging\iot_logging.c">
+      <Filter>FreeRTOS+\FreeRTOS IoT Libraries\standard\common\logging</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\mqtt\src\iot_mqtt_network.c">
       <Filter>FreeRTOS+\FreeRTOS IoT Libraries\standard\mqtt\src</Filter>
     </ClCompile>
-    <ClCompile Include="..\..\..\..\..\..\..\..\..\T\reviews\amazon-freertos-master\libraries\c_sdk\standard\mqtt\src\iot_mqtt_subscription.c">
+    <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\mqtt\src\iot_mqtt_subscription.c">
       <Filter>FreeRTOS+\FreeRTOS IoT Libraries\standard\mqtt\src</Filter>
     </ClCompile>
-    <ClCompile Include="..\..\..\..\..\..\..\..\..\T\reviews\amazon-freertos-master\libraries\c_sdk\standard\mqtt\src\iot_mqtt_validate.c">
+    <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\mqtt\src\iot_mqtt_validate.c">
       <Filter>FreeRTOS+\FreeRTOS IoT Libraries\standard\mqtt\src</Filter>
     </ClCompile>
-    <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\common\logging\iot_logging.c">
-      <Filter>FreeRTOS+\FreeRTOS IoT Libraries\standard\common\logging</Filter>
+    <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\freertos\iot_clock_freertos.c">
+      <Filter>FreeRTOS+\FreeRTOS IoT Libraries\abstractions\platform\freertos</Filter>
     </ClCompile>
-    <ClCompile Include="..\..\..\..\..\..\..\..\..\T\reviews\amazon-freertos-master\libraries\abstractions\platform\freertos\iot_threads_freertos.c">
+    <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\freertos\iot_threads_freertos.c">
       <Filter>FreeRTOS+\FreeRTOS IoT Libraries\abstractions\platform\freertos</Filter>
     </ClCompile>
-    <ClCompile Include="..\..\..\..\..\..\..\..\..\T\reviews\amazon-freertos-master\libraries\abstractions\platform\freertos\iot_clock_freertos.c">
+    <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\secure_sockets\freertos_plus_tcp\iot_secure_sockets.c">
+      <Filter>FreeRTOS+\FreeRTOS IoT Libraries\abstractions\secure_sockets\freertos_plus_tcp</Filter>
+    </ClCompile>
+    <ClCompile Include="DemoTasks\SimpleMQTTExamples.c">
+      <Filter>DemoTasks</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\freertos\iot_network_freertos.c">
       <Filter>FreeRTOS+\FreeRTOS IoT Libraries\abstractions\platform\freertos</Filter>
     </ClCompile>
   </ItemGroup>
@@ -283,9 +295,6 @@
     </ClInclude>
     <ClInclude Include="iot_config.h" />
     <ClInclude Include="iot_config_common.h" />
-    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\freertos\include\platform\iot_platform_types_afr.h">
-      <Filter>FreeRTOS+\FreeRTOS IoT Libraries\abstractions\platform\freertos\include\platform</Filter>
-    </ClInclude>
     <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\include\types\iot_platform_types.h">
       <Filter>FreeRTOS+\FreeRTOS IoT Libraries\abstractions\platform\include\types</Filter>
     </ClInclude>
@@ -307,5 +316,32 @@
     <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\mqtt\include\types\iot_mqtt_types.h">
       <Filter>FreeRTOS+\FreeRTOS IoT Libraries\standard\mqtt\include\types</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\freertos\include\platform\iot_platform_types_freertos.h">
+      <Filter>FreeRTOS+\FreeRTOS IoT Libraries\abstractions\platform\freertos\include\platform</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\include\platform\iot_clock.h">
+      <Filter>FreeRTOS+\FreeRTOS IoT Libraries\abstractions\platform\include\platform</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\include\platform\iot_metrics.h">
+      <Filter>FreeRTOS+\FreeRTOS IoT Libraries\abstractions\platform\include\platform</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\include\platform\iot_network.h">
+      <Filter>FreeRTOS+\FreeRTOS IoT Libraries\abstractions\platform\include\platform</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\platform\include\platform\iot_threads.h">
+      <Filter>FreeRTOS+\FreeRTOS IoT Libraries\abstractions\platform\include\platform</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\secure_sockets\include\iot_secure_sockets.h">
+      <Filter>FreeRTOS+\FreeRTOS IoT Libraries\abstractions\secure_sockets\include</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\secure_sockets\include\iot_secure_sockets_config_defaults.h">
+      <Filter>FreeRTOS+\FreeRTOS IoT Libraries\abstractions\secure_sockets\include</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\abstractions\secure_sockets\include\iot_secure_sockets_wrapper_metrics.h">
+      <Filter>FreeRTOS+\FreeRTOS IoT Libraries\abstractions\secure_sockets\include</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\Source\FreeRTOS-Plus-IoT-SDK\c_sdk\standard\common\include\private\iot_lib_init.h">
+      <Filter>FreeRTOS+\FreeRTOS IoT Libraries\standard\common\include\private</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/atomic.h b/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/atomic.h
new file mode 100644
index 000000000..d44593d8f
--- /dev/null
+++ b/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/atomic.h
@@ -0,0 +1,547 @@
+/*
+ * FreeRTOS Kernel V10.2.0
+ * Copyright (C) 2019 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://www.FreeRTOS.org
+ * http://aws.amazon.com/freertos
+ *
+ * 1 tab == 4 spaces!
+ */
+
+/**
+ * @file atomic.h
+ * @brief FreeRTOS atomic operation support.
+ *
+ * Two implementations of atomic are given in this header file:
+ * 1. Disabling interrupt globally.
+ * 2. ISA native atomic support.
+ * The former is available to all ports (compiler-architecture combination),
+ * while the latter is only available to ports compiling with GCC (version at
+ * least 4.7.0), which also have ISA atomic support.
+ *
+ * User can select which implementation to use by:
+ * setting/clearing configUSE_ATOMIC_INSTRUCTION in FreeRTOSConfig.h.
+ * Define AND set configUSE_ATOMIC_INSTRUCTION to 1 for ISA native atomic support.
+ * Undefine OR clear configUSE_ATOMIC_INSTRUCTION for disabling global interrupt
+ * implementation.
+ *
+ * @see GCC Built-in Functions for Memory Model Aware Atomic Operations
+ *      https://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
+ */
+
+#ifndef ATOMIC_H
+#define ATOMIC_H
+
+#ifndef INC_FREERTOS_H
+    #error "include FreeRTOS.h must appear in source files before include atomic.h"
+#endif
+
+/* Standard includes. */
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if defined ( configUSE_GCC_BUILTIN_ATOMICS ) && ( configUSE_GCC_BUILTIN_ATOMICS == 1 )
+
+    /* Needed for __atomic_compare_exchange() weak=false. */
+    #include <stdbool.h>
+
+    /* This branch is for GCC compiler and GCC compiler only. */
+    #ifndef portFORCE_INLINE
+        #define portFORCE_INLINE  inline __attribute__((always_inline))
+    #endif
+
+#else
+
+    /* Port specific definitions -- entering/exiting critical section.
+     * Refer template -- ./lib/FreeRTOS/portable/Compiler/Arch/portmacro.h
+     *
+     * Every call to ATOMIC_EXIT_CRITICAL() must be closely paired with
+     * ATOMIC_ENTER_CRITICAL().
+     */
+    #if defined( portSET_INTERRUPT_MASK_FROM_ISR )
+
+        /* Nested interrupt scheme is supported in this port. */
+        #define ATOMIC_ENTER_CRITICAL()     \
+            UBaseType_t uxCriticalSectionType = portSET_INTERRUPT_MASK_FROM_ISR()
+
+        #define ATOMIC_EXIT_CRITICAL()      \
+            portCLEAR_INTERRUPT_MASK_FROM_ISR( uxCriticalSectionType )
+
+    #else
+
+        /* Nested interrupt scheme is NOT supported in this port. */
+        #define ATOMIC_ENTER_CRITICAL()     portENTER_CRITICAL()
+        #define ATOMIC_EXIT_CRITICAL()      portEXIT_CRITICAL()
+
+    #endif /* portSET_INTERRUPT_MASK_FROM_ISR() */
+
+    /* Port specific definition -- "always inline". 
+     * Inline is compiler specific, and may not always get inlined depending on your optimization level. 
+     * Also, inline is considerred as performance optimization for atomic. 
+     * Thus, if portFORCE_INLINE is not provided by portmacro.h, instead of resulting error,
+     * simply define it. 
+     */
+    #ifndef portFORCE_INLINE
+        #define portFORCE_INLINE 
+    #endif
+
+#endif /* configUSE_GCC_BUILTIN_ATOMICS */
+
+#define ATOMIC_COMPARE_AND_SWAP_SUCCESS     0x1U        /**< Compare and swap succeeded, swapped. */
+#define ATOMIC_COMPARE_AND_SWAP_FAILURE     0x0U        /**< Compare and swap failed, did not swap. */
+
+/*----------------------------- Swap && CAS ------------------------------*/
+
+/**
+ * Atomic compare-and-swap
+ *
+ * @brief Performs an atomic compare-and-swap operation on the specified values.
+ *
+ * @param[in, out] pDestination  Pointer to memory location from where value is
+ *                               to be loaded and checked.
+ * @param[in] ulExchange         If condition meets, write this value to memory.
+ * @param[in] ulComparand        Swap condition.
+ *
+ * @return Unsigned integer of value 1 or 0. 1 for swapped, 0 for not swapped.
+ *
+ * @note This function only swaps *pDestination with ulExchange, if previous
+ *       *pDestination value equals ulComparand.
+ */
+static portFORCE_INLINE uint32_t Atomic_CompareAndSwap_u32(
+        uint32_t volatile * pDestination,
+        uint32_t ulExchange,
+        uint32_t ulComparand )
+{
+
+    uint32_t ulReturnValue = ATOMIC_COMPARE_AND_SWAP_FAILURE;
+
+#if defined ( configUSE_GCC_BUILTIN_ATOMICS ) && ( configUSE_GCC_BUILTIN_ATOMICS == 1 )
+
+    if ( __atomic_compare_exchange( pDestination,
+                                    &ulComparand,
+                                    &ulExchange,
+                                    false,
+                                    __ATOMIC_SEQ_CST,
+                                    __ATOMIC_SEQ_CST ) )
+    {
+        ulReturnValue = ATOMIC_COMPARE_AND_SWAP_SUCCESS;
+    }
+
+#else
+
+    ATOMIC_ENTER_CRITICAL();
+
+    if ( *pDestination == ulComparand )
+    {
+        *pDestination = ulExchange;
+        ulReturnValue = ATOMIC_COMPARE_AND_SWAP_SUCCESS;
+    }
+
+    ATOMIC_EXIT_CRITICAL();
+
+#endif
+
+    return ulReturnValue;
+
+}
+
+/**
+ * Atomic swap (pointers)
+ *
+ * @brief Atomically sets the address pointed to by *ppDestination to the value
+ *        of *pExchange.
+ *
+ * @param[in, out] ppDestination  Pointer to memory location from where a pointer
+ *                                value is to be loaded and written back to.
+ * @param[in] pExchange           Pointer value to be written to *ppDestination.
+ *
+ * @return The initial value of *ppDestination.
+ */
+static portFORCE_INLINE void * Atomic_SwapPointers_p32(
+        void * volatile * ppDestination,
+        void * pExchange )
+{
+    void * pReturnValue;
+
+#if defined ( configUSE_GCC_BUILTIN_ATOMICS ) && ( configUSE_GCC_BUILTIN_ATOMICS == 1 )
+
+    __atomic_exchange( ppDestination, &pExchange, &pReturnValue, __ATOMIC_SEQ_CST );
+
+#else
+
+    ATOMIC_ENTER_CRITICAL();
+
+    pReturnValue = *ppDestination;
+
+    *ppDestination = pExchange;
+
+    ATOMIC_EXIT_CRITICAL();
+
+#endif
+
+    return pReturnValue;
+}
+
+/**
+ * Atomic compare-and-swap (pointers)
+ *
+ * @brief Performs an atomic compare-and-swap operation on the specified pointer
+ *        values.
+ *
+ * @param[in, out] ppDestination  Pointer to memory location from where a pointer
+ *                                value is to be loaded and checked.
+ * @param[in] pExchange           If condition meets, write this value to memory.
+ * @param[in] pComparand          Swap condition.
+ *
+ * @return Unsigned integer of value 1 or 0. 1 for swapped, 0 for not swapped.
+ *
+ * @note This function only swaps *ppDestination with pExchange, if previous
+ *       *ppDestination value equals pComparand.
+ */
+static portFORCE_INLINE uint32_t Atomic_CompareAndSwapPointers_p32(
+        void * volatile * ppDestination,
+        void * pExchange, void * pComparand )
+{
+    uint32_t ulReturnValue = ATOMIC_COMPARE_AND_SWAP_FAILURE;
+
+#if defined ( configUSE_GCC_BUILTIN_ATOMICS ) && ( configUSE_GCC_BUILTIN_ATOMICS == 1 )
+    if ( __atomic_compare_exchange( ppDestination,
+                                    &pComparand,
+                                    &pExchange,
+                                    false,
+                                    __ATOMIC_SEQ_CST,
+                                    __ATOMIC_SEQ_CST ) )
+    {
+        ulReturnValue = ATOMIC_COMPARE_AND_SWAP_SUCCESS;
+    }
+
+#else
+
+    ATOMIC_ENTER_CRITICAL();
+
+    if ( *ppDestination == pComparand )
+    {
+        *ppDestination = pExchange;
+        ulReturnValue = ATOMIC_COMPARE_AND_SWAP_SUCCESS;
+    }
+
+    ATOMIC_EXIT_CRITICAL();
+
+#endif
+
+    return ulReturnValue;
+}
+
+
+/*----------------------------- Arithmetic ------------------------------*/
+
+/**
+ * Atomic add
+ *
+ * @brief Atomically adds count to the value of the specified pointer points to.
+ *
+ * @param[in,out] pAddend  Pointer to memory location from where value is to be
+ *                         loaded and written back to.
+ * @param[in] ulCount      Value to be added to *pAddend.
+ *
+ * @return previous *pAddend value.
+ */
+static portFORCE_INLINE uint32_t Atomic_Add_u32(
+        uint32_t volatile * pAddend,
+        uint32_t ulCount )
+{
+#if defined ( configUSE_GCC_BUILTIN_ATOMICS ) && ( configUSE_GCC_BUILTIN_ATOMICS == 1 )
+
+    return __atomic_fetch_add(pAddend, ulCount, __ATOMIC_SEQ_CST);
+
+#else
+
+    uint32_t ulCurrent;
+
+    ATOMIC_ENTER_CRITICAL();
+
+    ulCurrent = *pAddend;
+
+    *pAddend += ulCount;
+
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulCurrent;
+
+#endif
+}
+
+/**
+ * Atomic subtract
+ *
+ * @brief Atomically subtracts count from the value of the specified pointer
+ *        pointers to.
+ *
+ * @param[in,out] pAddend  Pointer to memory location from where value is to be
+ *                         loaded and written back to.
+ * @param[in] ulCount      Value to be subtract from *pAddend.
+ *
+ * @return previous *pAddend value.
+ */
+static portFORCE_INLINE uint32_t Atomic_Subtract_u32(
+        uint32_t volatile * pAddend,
+        uint32_t ulCount )
+{
+#if defined ( configUSE_GCC_BUILTIN_ATOMICS ) && ( configUSE_GCC_BUILTIN_ATOMICS == 1 )
+
+    return __atomic_fetch_sub(pAddend, ulCount, __ATOMIC_SEQ_CST);
+
+#else
+
+    uint32_t ulCurrent;
+
+    ATOMIC_ENTER_CRITICAL();
+
+    ulCurrent = *pAddend;
+
+    *pAddend -= ulCount;
+
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulCurrent;
+
+#endif
+}
+
+/**
+ * Atomic increment
+ *
+ * @brief Atomically increments the value of the specified pointer points to.
+ *
+ * @param[in,out] pAddend  Pointer to memory location from where value is to be
+ *                         loaded and written back to.
+ *
+ * @return *pAddend value before increment.
+ */
+static portFORCE_INLINE uint32_t Atomic_Increment_u32( uint32_t volatile * pAddend )
+{
+#if defined ( configUSE_GCC_BUILTIN_ATOMICS ) && ( configUSE_GCC_BUILTIN_ATOMICS == 1 )
+
+    return __atomic_fetch_add(pAddend, 1, __ATOMIC_SEQ_CST);
+
+#else
+
+    uint32_t ulCurrent;
+
+    ATOMIC_ENTER_CRITICAL();
+
+    ulCurrent = *pAddend;
+
+    *pAddend += 1;
+
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulCurrent;
+
+#endif
+}
+
+/**
+ * Atomic decrement
+ *
+ * @brief Atomically decrements the value of the specified pointer points to
+ *
+ * @param[in,out] pAddend  Pointer to memory location from where value is to be
+ *                         loaded and written back to.
+ *
+ * @return *pAddend value before decrement.
+ */
+static portFORCE_INLINE uint32_t Atomic_Decrement_u32( uint32_t volatile * pAddend )
+{
+#if defined ( configUSE_GCC_BUILTIN_ATOMICS ) && ( configUSE_GCC_BUILTIN_ATOMICS == 1 )
+
+    return __atomic_fetch_sub(pAddend, 1, __ATOMIC_SEQ_CST);
+
+#else
+
+    uint32_t ulCurrent;
+
+    ATOMIC_ENTER_CRITICAL();
+
+    ulCurrent = *pAddend;
+
+    *pAddend -= 1;
+
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulCurrent;
+
+#endif
+}
+
+/*----------------------------- Bitwise Logical ------------------------------*/
+
+/**
+ * Atomic OR
+ *
+ * @brief Performs an atomic OR operation on the specified values.
+ *
+ * @param [in, out] pDestination  Pointer to memory location from where value is
+ *                                to be loaded and written back to.
+ * @param [in] ulValue            Value to be ORed with *pDestination.
+ *
+ * @return The original value of *pDestination.
+ */
+static portFORCE_INLINE uint32_t Atomic_OR_u32(
+        uint32_t volatile * pDestination,
+        uint32_t ulValue )
+{
+#if defined ( configUSE_GCC_BUILTIN_ATOMICS ) && ( configUSE_GCC_BUILTIN_ATOMICS == 1 )
+
+    return __atomic_fetch_or(pDestination, ulValue, __ATOMIC_SEQ_CST);
+
+#else
+
+    uint32_t ulCurrent;
+
+    ATOMIC_ENTER_CRITICAL();
+
+    ulCurrent = *pDestination;
+
+    *pDestination |= ulValue;
+
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulCurrent;
+
+#endif
+}
+
+/**
+ * Atomic AND
+ *
+ * @brief Performs an atomic AND operation on the specified values.
+ *
+ * @param [in, out] pDestination  Pointer to memory location from where value is
+ *                                to be loaded and written back to.
+ * @param [in] ulValue            Value to be ANDed with *pDestination.
+ *
+ * @return The original value of *pDestination.
+ */
+static portFORCE_INLINE uint32_t Atomic_AND_u32(
+        uint32_t volatile * pDestination,
+        uint32_t ulValue )
+{
+#if defined ( configUSE_GCC_BUILTIN_ATOMICS ) && ( configUSE_GCC_BUILTIN_ATOMICS == 1 )
+
+    return __atomic_fetch_and(pDestination, ulValue, __ATOMIC_SEQ_CST);
+
+#else
+
+    uint32_t ulCurrent;
+
+    ATOMIC_ENTER_CRITICAL();
+
+    ulCurrent = *pDestination;
+
+    *pDestination &= ulValue;
+
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulCurrent;
+
+#endif
+}
+
+/**
+ * Atomic NAND
+ *
+ * @brief Performs an atomic NAND operation on the specified values.
+ *
+ * @param [in, out] pDestination  Pointer to memory location from where value is
+ *                                to be loaded and written back to.
+ * @param [in] ulValue            Value to be NANDed with *pDestination.
+ *
+ * @return The original value of *pDestination.
+ */
+static portFORCE_INLINE uint32_t Atomic_NAND_u32(
+        uint32_t volatile * pDestination,
+        uint32_t ulValue )
+{
+#if defined ( configUSE_GCC_BUILTIN_ATOMICS ) && ( configUSE_GCC_BUILTIN_ATOMICS == 1 )
+
+    return __atomic_fetch_nand(pDestination, ulValue, __ATOMIC_SEQ_CST);
+
+#else
+
+    uint32_t ulCurrent;
+
+    ATOMIC_ENTER_CRITICAL();
+
+    ulCurrent = *pDestination;
+
+    *pDestination = ~(ulCurrent & ulValue);
+
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulCurrent;
+
+#endif
+}
+
+/**
+ * Atomic XOR
+ *
+ * @brief Performs an atomic XOR operation on the specified values.
+ *
+ * @param [in, out] pDestination  Pointer to memory location from where value is
+ *                                to be loaded and written back to.
+ * @param [in] ulValue            Value to be XORed with *pDestination.
+ *
+ * @return The original value of *pDestination.
+ */
+static portFORCE_INLINE uint32_t Atomic_XOR_u32(
+        uint32_t volatile * pDestination,
+        uint32_t ulValue )
+{
+#if defined ( configUSE_GCC_BUILTIN_ATOMICS ) && ( configUSE_GCC_BUILTIN_ATOMICS == 1 )
+
+    return __atomic_fetch_xor(pDestination, ulValue, __ATOMIC_SEQ_CST);
+
+#else
+
+    uint32_t ulCurrent;
+
+    ATOMIC_ENTER_CRITICAL();
+
+    ulCurrent = *pDestination;
+
+    *pDestination ^= ulValue;
+
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulCurrent;
+
+#endif
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ATOMIC_H */
diff --git a/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/iot_secure_sockets_config.h b/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/iot_secure_sockets_config.h
new file mode 100644
index 000000000..6442e8de2
--- /dev/null
+++ b/FreeRTOS-Plus/Demo/FreeRTOS_IoT_Libraries/mqtt/iot_secure_sockets_config.h
@@ -0,0 +1,56 @@
+/*
+ * Amazon FreeRTOS V1.4.7
+ * Copyright (C) 2017 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://aws.amazon.com/freertos
+ * http://www.FreeRTOS.org
+ */
+
+/**
+ * @file aws_secure_sockets_config.h
+ * @brief Secure sockets configuration options.
+ */
+
+#ifndef _AWS_SECURE_SOCKETS_CONFIG_H_
+#define _AWS_SECURE_SOCKETS_CONFIG_H_
+
+/**
+ * @brief Byte order of the target MCU.
+ *
+ * Valid values are pdLITTLE_ENDIAN and pdBIG_ENDIAN.
+ */
+#define socketsconfigBYTE_ORDER                   pdLITTLE_ENDIAN
+
+/**
+ * @brief Default socket send timeout.
+ */
+#define socketsconfigDEFAULT_SEND_TIMEOUT         ( 10000 )
+
+/**
+ * @brief Default socket receive timeout.
+ */
+#define socketsconfigDEFAULT_RECV_TIMEOUT         ( 10000 )
+
+/**
+ * @brief Enable metrics of secure socket.
+ */
+#define AWS_IOT_SECURE_SOCKETS_METRICS_ENABLED    ( 0 )
+
+#endif /* _AWS_SECURE_SOCKETS_CONFIG_H_ */
\ No newline at end of file
diff --git a/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/platform/freertos/include/platform/iot_network_freertos.h b/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/platform/freertos/include/platform/iot_network_freertos.h
new file mode 100644
index 000000000..e4449ae24
--- /dev/null
+++ b/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/platform/freertos/include/platform/iot_network_freertos.h
@@ -0,0 +1,140 @@
+/*
+ * Amazon FreeRTOS Platform V1.0.0
+ * Copyright (C) 2019 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://aws.amazon.com/freertos
+ * http://www.FreeRTOS.org
+ */
+
+/**
+ * @file iot_network_freertos.h
+ * @brief Declares the network stack functions specified in aws_iot_network.h for
+ * Amazon FreeRTOS Secure Sockets.
+ */
+
+#ifndef _IOT_NETWORK_AFR_H_
+#define _IOT_NETWORK_AFR_H_
+
+/* Standard includes. */
+#include <stdbool.h>
+
+/* Platform network include. */
+#include "platform/iot_network.h"
+
+/* Amazon FreeRTOS Secure Sockets include. */
+#include "iot_secure_sockets.h"
+
+/**
+ * @brief Represents a network connection that uses Amazon FreeRTOS Secure Sockets.
+ *
+ * This is an incomplete type. In application code, only pointers to this type
+ * should be used.
+ */
+typedef struct _networkConnection IotNetworkConnectionAfr_t;
+
+/**
+ * @brief Provides a default value for an #IotNetworkConnectionAfr_t.
+ *
+ * All instances of #IotNetworkConnectionAfr_t should be initialized with
+ * this constant.
+ *
+ * @warning Failing to initialize an #IotNetworkConnectionAfr_t with this
+ * initializer may result in undefined behavior!
+ * @note This initializer may change at any time in future versions, but its
+ * name will remain the same.
+ */
+#define IOT_NETWORK_CONNECTION_AFR_INITIALIZER     { 0 }
+
+/**
+ * @brief Generic initializer for an #IotNetworkServerInfo_t.
+ *
+ * @note This initializer may change at any time in future versions, but its
+ * name will remain the same.
+ */
+#define IOT_NETWORK_SERVER_INFO_AFR_INITIALIZER    { 0 }
+
+/**
+ * @brief Generic initializer for an #IotNetworkCredentials_t.
+ *
+ * @note This initializer may change at any time in future versions, but its
+ * name will remain the same.
+ */
+#define IOT_NETWORK_CREDENTIALS_AFR_INITIALIZER    { 0 }
+
+/**
+ * @brief Provides a pointer to an #IotNetworkInterface_t that uses the functions
+ * declared in this file.
+ */
+#define IOT_NETWORK_INTERFACE_AFR    ( &( IotNetworkAfr ) )
+
+/**
+ * @brief An implementation of #IotNetworkInterface_t::create for Amazon FreeRTOS
+ * Secure Sockets.
+ */
+IotNetworkError_t IotNetworkAfr_Create( void * pConnectionInfo,
+                                        void * pCredentialInfo,
+                                        void ** const pConnection );
+
+/**
+ * @brief An implementation of #IotNetworkInterface_t::setReceiveCallback for
+ * Amazon FreeRTOS Secure Sockets.
+ */
+IotNetworkError_t IotNetworkAfr_SetReceiveCallback( void * pConnection,
+                                                    IotNetworkReceiveCallback_t receiveCallback,
+                                                    void * pContext );
+
+/**
+ * @brief An implementation of #IotNetworkInterface_t::send for Amazon FreeRTOS
+ * Secure Sockets.
+ */
+size_t IotNetworkAfr_Send( void * pConnection,
+                           const uint8_t * pMessage,
+                           size_t messageLength );
+
+/**
+ * @brief An implementation of #IotNetworkInterface_t::receive for Amazon FreeRTOS
+ * Secure Sockets.
+ */
+size_t IotNetworkAfr_Receive( void * pConnection,
+                              uint8_t * pBuffer,
+                              size_t bytesRequested );
+
+/**
+ * @brief An implementation of #IotNetworkInterface_t::close for Amazon FreeRTOS
+ * Secure Sockets.
+ */
+IotNetworkError_t IotNetworkAfr_Close( void * pConnection );
+
+/**
+ * @brief An implementation of #IotNetworkInterface_t::destroy for Amazon FreeRTOS
+ * Secure Sockets.
+ */
+IotNetworkError_t IotNetworkAfr_Destroy( void * pConnection );
+
+/**
+ * @cond DOXYGEN_IGNORE
+ * Doxygen should ignore this section.
+ *
+ * Declaration of a network interface struct using the functions in this file.
+ */
+extern const IotNetworkInterface_t IotNetworkAfr;
+/** @endcond */
+
+#endif /* ifndef _IOT_NETWORK_AFR_H_ */
diff --git a/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/platform/freertos/iot_network_freertos.c b/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/platform/freertos/iot_network_freertos.c
new file mode 100644
index 000000000..287a3128b
--- /dev/null
+++ b/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/platform/freertos/iot_network_freertos.c
@@ -0,0 +1,627 @@
+/*
+ * Amazon FreeRTOS Platform V1.0.0
+ * Copyright (C) 2019 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://aws.amazon.com/freertos
+ * http://www.FreeRTOS.org
+ */
+
+/**
+ * @file iot_network_freertos.c
+ * @brief Implementation of the network-related functions from iot_network_freertos.h
+ * for Amazon FreeRTOS secure sockets.
+ */
+
+/* The config header is always included first. */
+#include "iot_config.h"
+
+/* Standard includes. */
+#include <string.h>
+
+/* FreeRTOS includes. */
+#include "semphr.h"
+#include "event_groups.h"
+
+/* Error handling include. */
+#include "private/iot_error.h"
+
+/* Amazon FreeRTOS network include. */
+#include "platform/iot_network_freertos.h"
+
+/* Configure logs for the functions in this file. */
+#ifdef IOT_LOG_LEVEL_NETWORK
+    #define LIBRARY_LOG_LEVEL        IOT_LOG_LEVEL_NETWORK
+#else
+    #ifdef IOT_LOG_LEVEL_GLOBAL
+        #define LIBRARY_LOG_LEVEL    IOT_LOG_LEVEL_GLOBAL
+    #else
+        #define LIBRARY_LOG_LEVEL    IOT_LOG_NONE
+    #endif
+#endif
+
+#define LIBRARY_LOG_NAME    ( "NET" )
+#include "iot_logging_setup.h"
+
+/* Provide a default value for the number of milliseconds for a socket poll.
+ * This is a temporary workaround to deal with the lack of poll(). */
+#ifndef IOT_NETWORK_SOCKET_POLL_MS
+    #define IOT_NETWORK_SOCKET_POLL_MS    ( 1000 )
+#endif
+
+/**
+ * @brief The event group bit to set when a connection's socket is shut down.
+ */
+#define _FLAG_SHUTDOWN                ( 1 )
+
+/**
+ * @brief The event group bit to set when a connection's receive task exits.
+ */
+#define _FLAG_RECEIVE_TASK_EXITED     ( 2 )
+
+/**
+ * @brief The event group bit to set when the connection is destroyed from the
+ * receive task.
+ */
+#define _FLAG_CONNECTION_DESTROYED    ( 4 )
+
+/*-----------------------------------------------------------*/
+
+typedef struct _networkConnection
+{
+    Socket_t socket;                             /**< @brief Amazon FreeRTOS Secure Sockets handle. */
+    StaticSemaphore_t socketMutex;               /**< @brief Prevents concurrent threads from sending on a socket. */
+    StaticEventGroup_t connectionFlags;          /**< @brief Synchronizes with the receive task. */
+    TaskHandle_t receiveTask;                    /**< @brief Handle of the receive task, if any. */
+    IotNetworkReceiveCallback_t receiveCallback; /**< @brief Network receive callback, if any. */
+    void * pReceiveContext;                      /**< @brief The context for the receive callback. */
+    bool bufferedByteValid;                      /**< @brief Used to determine if the buffered byte is valid. */
+    uint8_t bufferedByte;                        /**< @brief A single byte buffered from a receive, since AFR Secure Sockets does not have poll(). */
+} _networkConnection_t;
+
+/*-----------------------------------------------------------*/
+
+/**
+ * @brief An #IotNetworkInterface_t that uses the functions in this file.
+ */
+const IotNetworkInterface_t IotNetworkAfr =
+{
+    .create             = IotNetworkAfr_Create,
+    .setReceiveCallback = IotNetworkAfr_SetReceiveCallback,
+    .send               = IotNetworkAfr_Send,
+    .receive            = IotNetworkAfr_Receive,
+    .close              = IotNetworkAfr_Close,
+    .destroy            = IotNetworkAfr_Destroy
+};
+
+/*-----------------------------------------------------------*/
+
+/**
+ * @brief Destroys a network connection.
+ *
+ * @param[in] pNetworkConnection The connection to destroy.
+ */
+static void _destroyConnection( _networkConnection_t * pNetworkConnection )
+{
+    /* Call Secure Sockets close function to free resources. */
+    int32_t socketStatus = SOCKETS_Close( pNetworkConnection->socket );
+
+    if( socketStatus != SOCKETS_ERROR_NONE )
+    {
+        IotLogWarn( "Failed to destroy connection." );
+    }
+
+    /* Free the network connection. */
+    vPortFree( pNetworkConnection );
+}
+
+/*-----------------------------------------------------------*/
+
+/**
+ * @brief Task routine that waits on incoming network data.
+ *
+ * @param[in] pArgument The network connection.
+ */
+static void _networkReceiveTask( void * pArgument )
+{
+    bool destroyConnection = false;
+    int32_t socketStatus = 0;
+    EventBits_t connectionFlags = 0;
+
+    /* Cast network connection to the correct type. */
+    _networkConnection_t * pNetworkConnection = pArgument;
+
+    while( true )
+    {
+        /* No buffered byte should be in the connection. */
+        configASSERT( pNetworkConnection->bufferedByteValid == false );
+
+        /* Block and wait for 1 byte of data. This simulates the behavior of poll().
+         * THIS IS A TEMPORARY WORKAROUND AND DOES NOT PROVIDE THREAD-SAFETY AGAINST
+         * MULTIPLE CALLS OF RECEIVE. */
+        do
+        {
+            socketStatus = SOCKETS_Recv( pNetworkConnection->socket,
+                                         &( pNetworkConnection->bufferedByte ),
+                                         1,
+                                         0 );
+
+            connectionFlags = xEventGroupGetBits( ( EventGroupHandle_t ) &( pNetworkConnection->connectionFlags ) );
+
+            if( ( connectionFlags & _FLAG_SHUTDOWN ) == _FLAG_SHUTDOWN )
+            {
+                socketStatus = SOCKETS_ECLOSED;
+            }
+
+            /* Check for timeout. Some ports return 0, some return EWOULDBLOCK. */
+        } while( ( socketStatus == 0 ) || ( socketStatus == SOCKETS_EWOULDBLOCK ) );
+
+        if( socketStatus <= 0 )
+        {
+            break;
+        }
+
+        pNetworkConnection->bufferedByteValid = true;
+
+        /* Invoke the network callback. */
+        pNetworkConnection->receiveCallback( pNetworkConnection,
+                                             pNetworkConnection->pReceiveContext );
+
+        /* Check if the connection was destroyed by the receive callback. This
+         * does not need to be thread-safe because the destroy connection function
+         * may only be called once (per its API doc). */
+        connectionFlags = xEventGroupGetBits( ( EventGroupHandle_t ) &( pNetworkConnection->connectionFlags ) );
+
+        if( ( connectionFlags & _FLAG_CONNECTION_DESTROYED ) == _FLAG_CONNECTION_DESTROYED )
+        {
+            destroyConnection = true;
+            break;
+        }
+    }
+
+    IotLogDebug( "Network receive task terminating." );
+
+    /* If necessary, destroy the network connection before exiting. */
+    if( destroyConnection == true )
+    {
+        _destroyConnection( pNetworkConnection );
+    }
+    else
+    {
+        /* Set the flag to indicate that the receive task has exited. */
+        ( void ) xEventGroupSetBits( ( EventGroupHandle_t ) &( pNetworkConnection->connectionFlags ),
+                                     _FLAG_RECEIVE_TASK_EXITED );
+    }
+
+    vTaskDelete( NULL );
+}
+
+/*-----------------------------------------------------------*/
+
+/**
+ * @brief Set up a secured TLS connection.
+ *
+ * @param[in] pAfrCredentials Credentials for the secured connection.
+ * @param[in] tcpSocket An initialized socket to secure.
+ * @param[in] pHostName Remote server name for SNI.
+ * @param[in] hostnameLength The length of `pHostName`.
+ *
+ * @return #IOT_NETWORK_SUCCESS or #IOT_NETWORK_SYSTEM_ERROR.
+ */
+static IotNetworkError_t _tlsSetup( const IotNetworkCredentials_t * pAfrCredentials,
+                                    Socket_t tcpSocket,
+                                    const char * pHostName,
+                                    size_t hostnameLength )
+{
+    IOT_FUNCTION_ENTRY( IotNetworkError_t, IOT_NETWORK_SUCCESS );
+    int32_t socketStatus = SOCKETS_ERROR_NONE;
+
+    /* ALPN options for AWS IoT. */
+    const char * ppcALPNProtos[] = { socketsAWS_IOT_ALPN_MQTT };
+
+    /* Set secured option. */
+    socketStatus = SOCKETS_SetSockOpt( tcpSocket,
+                                       0,
+                                       SOCKETS_SO_REQUIRE_TLS,
+                                       NULL,
+                                       0 );
+
+    if( socketStatus != SOCKETS_ERROR_NONE )
+    {
+        IotLogError( "Failed to set secured option for new connection." );
+        IOT_SET_AND_GOTO_CLEANUP( IOT_NETWORK_SYSTEM_ERROR );
+    }
+
+    /* Set ALPN option. */
+    if( pAfrCredentials->pAlpnProtos != NULL )
+    {
+        socketStatus = SOCKETS_SetSockOpt( tcpSocket,
+                                           0,
+                                           SOCKETS_SO_ALPN_PROTOCOLS,
+                                           ppcALPNProtos,
+                                           sizeof( ppcALPNProtos ) / sizeof( ppcALPNProtos[ 0 ] ) );
+
+        if( socketStatus != SOCKETS_ERROR_NONE )
+        {
+            IotLogError( "Failed to set ALPN option for new connection." );
+            IOT_SET_AND_GOTO_CLEANUP( IOT_NETWORK_SYSTEM_ERROR );
+        }
+    }
+
+    /* Set SNI option. */
+    if( pAfrCredentials->disableSni == false )
+    {
+        socketStatus = SOCKETS_SetSockOpt( tcpSocket,
+                                           0,
+                                           SOCKETS_SO_SERVER_NAME_INDICATION,
+                                           pHostName,
+                                           hostnameLength + 1 );
+
+        if( socketStatus != SOCKETS_ERROR_NONE )
+        {
+            IotLogError( "Failed to set SNI option for new connection." );
+            IOT_SET_AND_GOTO_CLEANUP( IOT_NETWORK_SYSTEM_ERROR );
+        }
+    }
+
+    /* Set custom server certificate. */
+    if( pAfrCredentials->pRootCa != NULL )
+    {
+        socketStatus = SOCKETS_SetSockOpt( tcpSocket,
+                                           0,
+                                           SOCKETS_SO_TRUSTED_SERVER_CERTIFICATE,
+                                           pAfrCredentials->pRootCa,
+                                           pAfrCredentials->rootCaSize );
+
+        if( socketStatus != SOCKETS_ERROR_NONE )
+        {
+            IotLogError( "Failed to set server certificate option for new connection." );
+            IOT_SET_AND_GOTO_CLEANUP( IOT_NETWORK_SYSTEM_ERROR );
+        }
+    }
+
+    IOT_FUNCTION_EXIT_NO_CLEANUP();
+}
+
+/*-----------------------------------------------------------*/
+
+IotNetworkError_t IotNetworkAfr_Create( void * pConnectionInfo,
+                                        void * pCredentialInfo,
+                                        void ** pConnection )
+{
+    IOT_FUNCTION_ENTRY( IotNetworkError_t, IOT_NETWORK_SUCCESS );
+    Socket_t tcpSocket = SOCKETS_INVALID_SOCKET;
+    int32_t socketStatus = SOCKETS_ERROR_NONE;
+    SocketsSockaddr_t serverAddress = { 0 };
+    EventGroupHandle_t pConnectionFlags = NULL;
+    SemaphoreHandle_t pConnectionMutex = NULL;
+    const TickType_t receiveTimeout = pdMS_TO_TICKS( IOT_NETWORK_SOCKET_POLL_MS );
+    _networkConnection_t * pNewNetworkConnection = NULL;
+
+    /* Cast function parameters to correct types. */
+    const IotNetworkServerInfo_t * pServerInfo = pConnectionInfo;
+    const IotNetworkCredentials_t * pAfrCredentials = pCredentialInfo;
+    _networkConnection_t ** pNetworkConnection = ( _networkConnection_t ** ) pConnection;
+
+    /* Check host name length against the maximum length allowed by Secure
+     * Sockets. */
+    const size_t hostnameLength = strlen( pServerInfo->pHostName );
+
+    if( hostnameLength > ( size_t ) securesocketsMAX_DNS_NAME_LENGTH )
+    {
+        IotLogError( "Host name length exceeds %d, which is the maximum allowed.",
+                     securesocketsMAX_DNS_NAME_LENGTH );
+        IOT_SET_AND_GOTO_CLEANUP( IOT_NETWORK_BAD_PARAMETER );
+    }
+
+    pNewNetworkConnection = pvPortMalloc( sizeof( _networkConnection_t ) );
+
+    if( pNewNetworkConnection == NULL )
+    {
+        IotLogError( "Failed to allocate memory for new network connection." );
+        IOT_SET_AND_GOTO_CLEANUP( IOT_NETWORK_NO_MEMORY );
+    }
+
+    /* Clear the connection information. */
+    ( void ) memset( pNewNetworkConnection, 0x00, sizeof( _networkConnection_t ) );
+
+    /* Create a new TCP socket. */
+    tcpSocket = SOCKETS_Socket( SOCKETS_AF_INET,
+                                SOCKETS_SOCK_STREAM,
+                                SOCKETS_IPPROTO_TCP );
+
+    if( tcpSocket == SOCKETS_INVALID_SOCKET )
+    {
+        IotLogError( "Failed to create new socket." );
+        IOT_SET_AND_GOTO_CLEANUP( IOT_NETWORK_SYSTEM_ERROR );
+    }
+
+    /* Set up connection encryption if credentials are provided. */
+    if( pAfrCredentials != NULL )
+    {
+        status = _tlsSetup( pAfrCredentials, tcpSocket, pServerInfo->pHostName, hostnameLength );
+
+        if( status != IOT_NETWORK_SUCCESS )
+        {
+            IOT_GOTO_CLEANUP();
+        }
+    }
+
+    /* Establish connection. */
+    serverAddress.ucSocketDomain = SOCKETS_AF_INET;
+    serverAddress.usPort = SOCKETS_htons( pServerInfo->port );
+    serverAddress.ulAddress = SOCKETS_GetHostByName( pServerInfo->pHostName );
+
+    /* Check for errors from DNS lookup. */
+    if( serverAddress.ulAddress == 0 )
+    {
+        IotLogError( "Failed to resolve %s.", pServerInfo->pHostName );
+        IOT_SET_AND_GOTO_CLEANUP( IOT_NETWORK_SYSTEM_ERROR );
+    }
+
+    socketStatus = SOCKETS_Connect( tcpSocket,
+                                    &serverAddress,
+                                    sizeof( SocketsSockaddr_t ) );
+
+    if( socketStatus != SOCKETS_ERROR_NONE )
+    {
+        IotLogError( "Failed to establish new connection." );
+        IOT_SET_AND_GOTO_CLEANUP( IOT_NETWORK_SYSTEM_ERROR );
+    }
+
+    /* Set a long timeout for receive. */
+    socketStatus = SOCKETS_SetSockOpt( tcpSocket,
+                                       0,
+                                       SOCKETS_SO_RCVTIMEO,
+                                       &receiveTimeout,
+                                       sizeof( TickType_t ) );
+
+    if( socketStatus != SOCKETS_ERROR_NONE )
+    {
+        IotLogError( "Failed to set socket receive timeout." );
+        IOT_SET_AND_GOTO_CLEANUP( IOT_NETWORK_SYSTEM_ERROR );
+    }
+
+    IOT_FUNCTION_CLEANUP_BEGIN();
+
+    /* Clean up on failure. */
+    if( status != IOT_NETWORK_SUCCESS )
+    {
+        if( tcpSocket != SOCKETS_INVALID_SOCKET )
+        {
+            SOCKETS_Close( tcpSocket );
+        }
+
+        /* Clear the connection information. */
+        if( pNewNetworkConnection != NULL )
+        {
+            vPortFree( pNewNetworkConnection );
+        }
+    }
+    else
+    {
+        /* Set the socket. */
+        pNewNetworkConnection->socket = tcpSocket;
+
+        /* Create the connection event flags and mutex. */
+        pConnectionFlags = xEventGroupCreateStatic( &( pNewNetworkConnection->connectionFlags ) );
+        pConnectionMutex = xSemaphoreCreateMutexStatic( &( pNewNetworkConnection->socketMutex ) );
+
+        /* Static event flags and mutex creation should never fail. The handles
+         * should point inside the connection object. */
+        configASSERT( pConnectionFlags == ( EventGroupHandle_t ) &( pNewNetworkConnection->connectionFlags ) );
+        configASSERT( pConnectionMutex == ( SemaphoreHandle_t ) &( pNewNetworkConnection->socketMutex ) );
+
+        /* Set the output parameter. */
+        *pNetworkConnection = pNewNetworkConnection;
+    }
+
+    IOT_FUNCTION_CLEANUP_END();
+}
+
+/*-----------------------------------------------------------*/
+
+IotNetworkError_t IotNetworkAfr_SetReceiveCallback( void * pConnection,
+                                                    IotNetworkReceiveCallback_t receiveCallback,
+                                                    void * pContext )
+{
+    IotNetworkError_t status = IOT_NETWORK_SUCCESS;
+
+    /* Cast network connection to the correct type. */
+    _networkConnection_t * pNetworkConnection = ( _networkConnection_t * ) pConnection;
+
+    /* Set the receive callback and context. */
+    pNetworkConnection->receiveCallback = receiveCallback;
+    pNetworkConnection->pReceiveContext = pContext;
+
+    /* No flags should be set. */
+    configASSERT( xEventGroupGetBits( ( EventGroupHandle_t ) &( pNetworkConnection->connectionFlags ) ) == 0 );
+
+    /* Create task that waits for incoming data. */
+    if( xTaskCreate( _networkReceiveTask,
+                     "NetRecv",
+                     IOT_NETWORK_RECEIVE_TASK_STACK_SIZE,
+                     pNetworkConnection,
+                     IOT_NETWORK_RECEIVE_TASK_PRIORITY,
+                     &( pNetworkConnection->receiveTask ) ) != pdPASS )
+    {
+        IotLogError( "Failed to create network receive task." );
+
+        status = IOT_NETWORK_SYSTEM_ERROR;
+    }
+
+    return status;
+}
+
+/*-----------------------------------------------------------*/
+
+size_t IotNetworkAfr_Send( void * pConnection,
+                           const uint8_t * pMessage,
+                           size_t messageLength )
+{
+    size_t bytesSent = 0;
+    int32_t socketStatus = SOCKETS_ERROR_NONE;
+
+    /* Cast network connection to the correct type. */
+    _networkConnection_t * pNetworkConnection = ( _networkConnection_t * ) pConnection;
+
+    /* Only one thread at a time may send on the connection. Lock the socket
+     * mutex to prevent other threads from sending. */
+    if( xSemaphoreTake( ( QueueHandle_t ) &( pNetworkConnection->socketMutex ),
+                        portMAX_DELAY ) == pdTRUE )
+    {
+        socketStatus = SOCKETS_Send( pNetworkConnection->socket,
+                                     pMessage,
+                                     messageLength,
+                                     0 );
+
+        if( socketStatus > 0 )
+        {
+            bytesSent = ( size_t ) socketStatus;
+        }
+
+        xSemaphoreGive( ( QueueHandle_t ) &( pNetworkConnection->socketMutex ) );
+    }
+
+    return bytesSent;
+}
+
+/*-----------------------------------------------------------*/
+
+size_t IotNetworkAfr_Receive( void * pConnection,
+                              uint8_t * pBuffer,
+                              size_t bytesRequested )
+{
+    int32_t socketStatus = 0;
+    size_t bytesReceived = 0, bytesRemaining = bytesRequested;
+
+    /* Cast network connection to the correct type. */
+    _networkConnection_t * pNetworkConnection = ( _networkConnection_t * ) pConnection;
+
+    /* Write the buffered byte. THIS IS A TEMPORARY WORKAROUND AND ASSUMES THIS
+     * FUNCTION IS ALWAYS CALLED FROM THE RECEIVE CALLBACK. */
+    if( pNetworkConnection->bufferedByteValid == true )
+    {
+        *pBuffer = pNetworkConnection->bufferedByte;
+        bytesReceived = 1;
+        bytesRemaining--;
+        pNetworkConnection->bufferedByteValid = false;
+    }
+
+    /* Block and wait for incoming data. */
+    while( bytesRemaining > 0 )
+    {
+        socketStatus = SOCKETS_Recv( pNetworkConnection->socket,
+                                     pBuffer + bytesReceived,
+                                     bytesRemaining,
+                                     0 );
+
+        if( socketStatus == SOCKETS_EWOULDBLOCK )
+        {
+            /* The return value EWOULDBLOCK means no data was received within
+             * the socket timeout. Ignore it and try again. */
+            continue;
+        }
+        else if( socketStatus <= 0 )
+        {
+            IotLogError( "Error %ld while receiving data.", ( long int ) socketStatus );
+            break;
+        }
+        else
+        {
+            bytesReceived += ( size_t ) socketStatus;
+            bytesRemaining -= ( size_t ) socketStatus;
+
+            configASSERT( bytesReceived + bytesRemaining == bytesRequested );
+        }
+    }
+
+    if( bytesReceived < bytesRequested )
+    {
+        IotLogWarn( "Receive requested %lu bytes, but %lu bytes received instead.",
+                    ( unsigned long ) bytesRequested,
+                    ( unsigned long ) bytesReceived );
+    }
+    else
+    {
+        IotLogDebug( "Successfully received %lu bytes.",
+                     ( unsigned long ) bytesRequested );
+    }
+
+    return bytesReceived;
+}
+
+/*-----------------------------------------------------------*/
+
+IotNetworkError_t IotNetworkAfr_Close( void * pConnection )
+{
+    int32_t socketStatus = SOCKETS_ERROR_NONE;
+
+    /* Cast network connection to the correct type. */
+    _networkConnection_t * pNetworkConnection = ( _networkConnection_t * ) pConnection;
+
+    /* Call Secure Sockets shutdown function to close connection. */
+    socketStatus = SOCKETS_Shutdown( pNetworkConnection->socket,
+                                     SOCKETS_SHUT_RDWR );
+
+    if( socketStatus != SOCKETS_ERROR_NONE )
+    {
+        IotLogWarn( "Failed to close connection." );
+    }
+
+    /* Set the shutdown flag. */
+    ( void ) xEventGroupSetBits( ( EventGroupHandle_t ) &( pNetworkConnection->connectionFlags ),
+                                 _FLAG_SHUTDOWN );
+
+    return IOT_NETWORK_SUCCESS;
+}
+
+/*-----------------------------------------------------------*/
+
+IotNetworkError_t IotNetworkAfr_Destroy( void * pConnection )
+{
+    /* Cast network connection to the correct type. */
+    _networkConnection_t * pNetworkConnection = ( _networkConnection_t * ) pConnection;
+
+    /* Check if this function is being called from the receive task. */
+    if( xTaskGetCurrentTaskHandle() == pNetworkConnection->receiveTask )
+    {
+        /* Set the flag specifying that the connection is destroyed. */
+        ( void ) xEventGroupSetBits( ( EventGroupHandle_t ) &( pNetworkConnection->connectionFlags ),
+                                     _FLAG_CONNECTION_DESTROYED );
+    }
+    else
+    {
+        /* If a receive task was created, wait for it to exit. */
+        if( pNetworkConnection->receiveTask != NULL )
+        {
+            ( void ) xEventGroupWaitBits( ( EventGroupHandle_t ) &( pNetworkConnection->connectionFlags ),
+                                          _FLAG_RECEIVE_TASK_EXITED,
+                                          pdTRUE,
+                                          pdTRUE,
+                                          portMAX_DELAY );
+        }
+
+        _destroyConnection( pNetworkConnection );
+    }
+
+    return IOT_NETWORK_SUCCESS;
+}
+
+/*-----------------------------------------------------------*/
diff --git a/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/secure_sockets/freertos_plus_tcp/iot_secure_sockets.c b/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/secure_sockets/freertos_plus_tcp/iot_secure_sockets.c
new file mode 100644
index 000000000..af809c24c
--- /dev/null
+++ b/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/secure_sockets/freertos_plus_tcp/iot_secure_sockets.c
@@ -0,0 +1,342 @@
+/*
+ * Amazon FreeRTOS Secure Sockets V1.1.5
+ * Copyright (C) 2018 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://aws.amazon.com/freertos
+ * http://www.FreeRTOS.org
+ */
+
+/* Define _SECURE_SOCKETS_WRAPPER_NOT_REDEFINE to prevent secure sockets functions
+ * from redefining in iot_secure_sockets_wrapper_metrics.h */
+#define _SECURE_SOCKETS_WRAPPER_NOT_REDEFINE
+
+/* FreeRTOS includes. */
+#include "FreeRTOS.h"
+#include "FreeRTOSIPConfig.h"
+#include "list.h"
+#include "semphr.h"
+#include "FreeRTOS_IP.h"
+#include "FreeRTOS_Sockets.h"
+#include "iot_secure_sockets.h"
+#include "task.h"
+
+#undef _SECURE_SOCKETS_WRAPPER_NOT_REDEFINE
+
+/* Internal context structure. */
+typedef struct SSOCKETContext
+{
+    Socket_t xSocket;
+    char * pcDestination;
+    BaseType_t xSendFlags;
+    BaseType_t xRecvFlags;
+    BaseType_t xConnectAttempted;
+} SSOCKETContext_t, * SSOCKETContextPtr_t;
+
+/*
+ * Helper routines.
+ */
+
+/*
+ * @brief Network send callback.
+ */
+static BaseType_t prvNetworkSend( void * pvContext,
+                                  const unsigned char * pucData,
+                                  size_t xDataLength )
+{
+    SSOCKETContextPtr_t pxContext = ( SSOCKETContextPtr_t ) pvContext; /*lint !e9087 cast used for portability. */
+
+    return FreeRTOS_send( pxContext->xSocket, pucData, xDataLength, pxContext->xSendFlags );
+}
+/*-----------------------------------------------------------*/
+
+/*
+ * @brief Network receive callback.
+ */
+static BaseType_t prvNetworkRecv( void * pvContext,
+                                  unsigned char * pucReceiveBuffer,
+                                  size_t xReceiveLength )
+{
+    SSOCKETContextPtr_t pxContext = ( SSOCKETContextPtr_t ) pvContext; /*lint !e9087 cast used for portability. */
+
+    return FreeRTOS_recv( pxContext->xSocket, pucReceiveBuffer, xReceiveLength, pxContext->xRecvFlags );
+}
+/*-----------------------------------------------------------*/
+
+/*
+ * Interface routines.
+ */
+
+int32_t SOCKETS_Close( Socket_t xSocket )
+{
+    SSOCKETContextPtr_t pxContext = ( SSOCKETContextPtr_t ) xSocket; /*lint !e9087 cast used for portability. */
+    int32_t lReturn;
+
+    if( ( xSocket != SOCKETS_INVALID_SOCKET ) && ( NULL != pxContext ) )
+    {
+        /* Clean-up destination string. */
+        if( NULL != pxContext->pcDestination )
+        {
+            vPortFree( pxContext->pcDestination );
+        }
+
+        /* Close the underlying socket handle. */
+        ( void ) FreeRTOS_closesocket( pxContext->xSocket );
+
+        /* Free the context. */
+        vPortFree( pxContext );
+        lReturn = SOCKETS_ERROR_NONE;
+    }
+    else
+    {
+        lReturn = SOCKETS_EINVAL;
+    }
+
+    return lReturn;
+}
+/*-----------------------------------------------------------*/
+
+int32_t SOCKETS_Connect( Socket_t xSocket,
+                         SocketsSockaddr_t * pxAddress,
+                         Socklen_t xAddressLength )
+{
+    int32_t lStatus = SOCKETS_ERROR_NONE;
+    SSOCKETContextPtr_t pxContext = ( SSOCKETContextPtr_t ) xSocket; /*lint !e9087 cast used for portability. */
+    struct freertos_sockaddr xTempAddress = { 0 };
+
+    if( ( pxContext != SOCKETS_INVALID_SOCKET ) && ( pxAddress != NULL ) )
+    {
+        /* A connection was attempted. If this function fails, then the socket is invalid and the user
+         * must call SOCKETS_Close(), on this socket, and SOCKETS_Socket() to get a new socket. */
+        pxContext->xConnectAttempted = pdTRUE;
+
+        /* Connect the wrapped socket. */
+        xTempAddress.sin_addr = pxAddress->ulAddress;
+        xTempAddress.sin_family = pxAddress->ucSocketDomain;
+        xTempAddress.sin_len = ( uint8_t ) sizeof( xTempAddress );
+        xTempAddress.sin_port = pxAddress->usPort;
+        lStatus = FreeRTOS_connect( pxContext->xSocket, &xTempAddress, xAddressLength );
+    }
+    else
+    {
+        lStatus = SOCKETS_SOCKET_ERROR;
+    }
+
+    return lStatus;
+}
+/*-----------------------------------------------------------*/
+
+uint32_t SOCKETS_GetHostByName( const char * pcHostName )
+{
+    return FreeRTOS_gethostbyname( pcHostName );
+}
+/*-----------------------------------------------------------*/
+
+int32_t SOCKETS_Recv( Socket_t xSocket,
+                      void * pvBuffer,
+                      size_t xBufferLength,
+                      uint32_t ulFlags )
+{
+    int32_t lStatus = SOCKETS_SOCKET_ERROR;
+    SSOCKETContextPtr_t pxContext = ( SSOCKETContextPtr_t ) xSocket; /*lint !e9087 cast used for portability. */
+
+    if( ( xSocket != SOCKETS_INVALID_SOCKET ) &&
+        ( pvBuffer != NULL ) )
+    {
+        pxContext->xRecvFlags = ( BaseType_t ) ulFlags;
+
+        /* Receive unencrypted. */
+        lStatus = prvNetworkRecv( pxContext, pvBuffer, xBufferLength );
+    }
+    else
+    {
+        lStatus = SOCKETS_EINVAL;
+    }
+
+    return lStatus;
+}
+/*-----------------------------------------------------------*/
+
+int32_t SOCKETS_Send( Socket_t xSocket,
+                      const void * pvBuffer,
+                      size_t xDataLength,
+                      uint32_t ulFlags )
+{
+    int32_t lStatus = SOCKETS_SOCKET_ERROR;
+    SSOCKETContextPtr_t pxContext = ( SSOCKETContextPtr_t ) xSocket; /*lint !e9087 cast used for portability. */
+
+    if( ( xSocket != SOCKETS_INVALID_SOCKET ) &&
+        ( pvBuffer != NULL ) )
+    {
+        pxContext->xSendFlags = ( BaseType_t ) ulFlags;
+
+        /* Send unencrypted. */
+        lStatus = prvNetworkSend( pxContext, pvBuffer, xDataLength );
+    }
+    else
+    {
+        lStatus = SOCKETS_EINVAL;
+    }
+
+    return lStatus;
+}
+/*-----------------------------------------------------------*/
+
+int32_t SOCKETS_SetSockOpt( Socket_t xSocket,
+                            int32_t lLevel,
+                            int32_t lOptionName,
+                            const void * pvOptionValue,
+                            size_t xOptionLength )
+{
+    int32_t lStatus = SOCKETS_ERROR_NONE;
+    TickType_t xTimeout;
+    SSOCKETContextPtr_t pxContext = ( SSOCKETContextPtr_t ) xSocket; /*lint !e9087 cast used for portability. */
+
+    if( ( xSocket != SOCKETS_INVALID_SOCKET ) && ( xSocket != NULL ) )
+    {
+        switch( lOptionName )
+        {
+            case SOCKETS_SO_NONBLOCK:
+                xTimeout = 0;
+
+                /* Non-blocking connect is not supported.  Socket may be set to nonblocking
+                 * only after a connection is made. */
+                if( pdTRUE == pxContext->xConnectAttempted )
+                {
+                    lStatus = FreeRTOS_setsockopt( pxContext->xSocket,
+                                                   lLevel,
+                                                   SOCKETS_SO_RCVTIMEO,
+                                                   &xTimeout,
+                                                   sizeof( xTimeout ) );
+
+                    if( lStatus == SOCKETS_ERROR_NONE )
+                    {
+                        lStatus = FreeRTOS_setsockopt( pxContext->xSocket,
+                                                       lLevel,
+                                                       SOCKETS_SO_SNDTIMEO,
+                                                       &xTimeout,
+                                                       sizeof( xTimeout ) );
+                    }
+                }
+                else
+                {
+                    lStatus = SOCKETS_EISCONN;
+                }
+
+                break;
+
+            case SOCKETS_SO_RCVTIMEO:
+            case SOCKETS_SO_SNDTIMEO:
+                /* Comply with Berkeley standard - a 0 timeout is wait forever. */
+                xTimeout = *( ( const TickType_t * ) pvOptionValue ); /*lint !e9087 pvOptionValue passed should be of TickType_t */
+
+                if( xTimeout == 0U )
+                {
+                    xTimeout = portMAX_DELAY;
+                }
+
+                lStatus = FreeRTOS_setsockopt( pxContext->xSocket,
+                                               lLevel,
+                                               lOptionName,
+                                               &xTimeout,
+                                               xOptionLength );
+                break;
+
+            default:
+                lStatus = FreeRTOS_setsockopt( pxContext->xSocket,
+                                               lLevel,
+                                               lOptionName,
+                                               pvOptionValue,
+                                               xOptionLength );
+                break;
+        }
+    }
+    else
+    {
+        lStatus = SOCKETS_EINVAL;
+    }
+
+    return lStatus;
+}
+/*-----------------------------------------------------------*/
+
+int32_t SOCKETS_Shutdown( Socket_t xSocket,
+                          uint32_t ulHow )
+{
+    int32_t lReturn;
+    SSOCKETContextPtr_t pxContext = ( SSOCKETContextPtr_t ) xSocket; /*lint !e9087 cast used for portability. */
+
+    if( ( xSocket != SOCKETS_INVALID_SOCKET ) && ( xSocket != NULL ) )
+    {
+        lReturn = FreeRTOS_shutdown( pxContext->xSocket, ( BaseType_t ) ulHow );
+    }
+    else
+    {
+        lReturn = SOCKETS_EINVAL;
+    }
+
+    return lReturn;
+}
+/*-----------------------------------------------------------*/
+
+Socket_t SOCKETS_Socket( int32_t lDomain,
+                         int32_t lType,
+                         int32_t lProtocol )
+{
+    SSOCKETContextPtr_t pxContext = NULL;
+    Socket_t xSocket;
+
+    /* Ensure that only supported values are supplied. */
+    configASSERT( lDomain == SOCKETS_AF_INET );
+    configASSERT( lType == SOCKETS_SOCK_STREAM );
+    configASSERT( lProtocol == SOCKETS_IPPROTO_TCP );
+
+    /* Create the wrapped socket. */
+    xSocket = FreeRTOS_socket( lDomain, lType, lProtocol );
+
+    if( xSocket != FREERTOS_INVALID_SOCKET )
+    {
+        /* Allocate the internal context structure. */
+        if( NULL == ( pxContext = pvPortMalloc( sizeof( SSOCKETContext_t ) ) ) )
+        {
+            /* Need to close socket. */
+            ( void ) FreeRTOS_closesocket( xSocket );
+            pxContext = SOCKETS_INVALID_SOCKET;
+        }
+        else
+        {
+            memset( pxContext, 0, sizeof( SSOCKETContext_t ) );
+            pxContext->xSocket = xSocket;
+        }
+    }
+    else
+    {
+        pxContext = SOCKETS_INVALID_SOCKET;
+    }
+
+    return pxContext;
+}
+/*-----------------------------------------------------------*/
+
+BaseType_t SOCKETS_Init( void )
+{
+    /* Empty initialization for this port. */
+    return pdPASS;
+}
+/*-----------------------------------------------------------*/
diff --git a/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/secure_sockets/include/iot_secure_sockets.h b/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/secure_sockets/include/iot_secure_sockets.h
new file mode 100644
index 000000000..d7c794a50
--- /dev/null
+++ b/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/secure_sockets/include/iot_secure_sockets.h
@@ -0,0 +1,609 @@
+/*
+ * Amazon FreeRTOS Secure Sockets V1.1.5
+ * Copyright (C) 2018 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://aws.amazon.com/freertos
+ * http://www.FreeRTOS.org
+ */
+
+/**
+ * @file iot_secure_sockets.h
+ * @brief Secure Sockets Interface.
+ *
+ * Secure sockets is a portable layer for establishing a TCP/IP
+ * connection, with the option of using TLS.
+ *
+ * Secure sockets is based on the Berkeley sockets API.
+ * A few difference general differences between Berkeley and SOCKETS are:
+ * - SOCKETS has additional socket options to enable TLS, server name
+ * indication, and per-socket root of trust server certificates.  See
+ * SOCKETS_SetSockOpt() for more information.
+ * - SOCKETS API return an error code, rather than returning -1 and setting
+ * a global errno value.
+ *
+ */
+
+#ifndef _AWS_SECURE_SOCKETS_H_
+#define _AWS_SECURE_SOCKETS_H_
+
+/*
+ #ifdef __cplusplus
+ *  extern "C" {
+ #endif
+ */
+#include <stdint.h>
+#include <stddef.h>
+#include "iot_secure_sockets_config.h"
+#include "iot_secure_sockets_config_defaults.h"
+#include "iot_secure_sockets_wrapper_metrics.h"
+#include "iot_lib_init.h"
+
+/**
+ * @ingroup SecureSockets_datatypes_handles
+ * @brief The socket handle data type.
+ *
+ * For detail of socket, refer to [Network Sockets]
+ * (https://www.freertos.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/socket.html)
+ *
+ * Data contained by the Socket_t type is port specific.
+ */
+typedef void * Socket_t;
+
+/**
+ * @brief The "size_t" of secure sockets.
+ *
+ * This type is used for compatibility with the expected Berkeley sockets
+ * naming.
+ */
+#define Socklen_t    uint32_t
+
+/**
+ * @anchor SocketsErrors
+ * @name SocketsErrors
+ * @brief Error codes returned by the SOCKETS API.
+ *
+ * Note that SOCKETS API may also propagate port-specific
+ * error codes when they are more descriptive. See your
+ * port's error codes for more details.
+ * PORT_SPECIFIC_LINK
+ */
+/**@{ */
+
+#define SOCKETS_ERROR_NONE               ( 0 )     /*!< No error. */
+#define SOCKETS_SOCKET_ERROR             ( -1 )    /*!< Catch-all sockets error code. */
+#define SOCKETS_EWOULDBLOCK              ( -11 )   /*!< A resource is temporarily unavailable. */
+#define SOCKETS_ENOMEM                   ( -12 )   /*!< Memory allocation failed. */
+#define SOCKETS_EINVAL                   ( -22 )   /*!< Invalid argument. */
+#define SOCKETS_ENOPROTOOPT              ( -109 )  /*!< A bad option was specified . */
+#define SOCKETS_ENOTCONN                 ( -126 )  /*!< The supplied socket is not connected. */
+#define SOCKETS_EISCONN                  ( -127 )  /*!< The supplied socket is already connected. */
+#define SOCKETS_ECLOSED                  ( -128 )  /*!< The supplied socket has already been closed. */
+#define SOCKETS_TLS_INIT_ERROR           ( -1001 ) /*!< TLS initialization failed. */
+#define SOCKETS_TLS_HANDSHAKE_ERROR      ( -1002 ) /*!< TLS handshake failed. */
+#define SOCKETS_TLS_SERVER_UNVERIFIED    ( -1003 ) /*!< A connection was made but the server could not be verified.  It is recommended that the socket be closed. */
+#define SOCKETS_TLS_RECV_ERROR           ( -1004 ) /*!< TLS receive operation failed. */
+#define SOCKETS_TLS_SEND_ERROR           ( -1005 ) /*!< TLS send operation failed. */
+#define SOCKETS_PERIPHERAL_RESET         ( -1006 ) /*!< Communications peripheral has been reset. */
+/**@} */
+
+/**
+ * @brief Assigned to an Socket_t variable when the socket is not valid.
+ */
+#define SOCKETS_INVALID_SOCKET    ( ( Socket_t ) ~0U )
+
+/**
+ * @anchor SocketDomains
+ * @name SocketDomains
+ *
+ * @brief Options for the lDomain parameter of SOCKETS_Socket()
+ * function.
+ *
+ * These select the protocol family to be used for communication.
+ */
+/**@{ */
+#define SOCKETS_AF_INET     ( 2 )           /*!< IPv4 Internet Protocols. */
+#define SOCKETS_PF_INET     SOCKETS_AF_INET /*!< IPv4 Internet Protocol. */
+#define SOCKETS_AF_INET6    ( 10 )          /*!< IPv6 Internet Protocols. This option is currently not supported. */
+/**@} */
+
+/**
+ * @anchor SocketTypes
+ * @name SocketTypes
+ *
+ * @brief Options for the lType parameter of SOCKETS_Socket()
+ * function.
+ *
+ * These specify the communication semantics.
+ */
+/**@{ */
+#define SOCKETS_SOCK_DGRAM     ( 2 )    /*!< Datagram. */
+#define SOCKETS_SOCK_STREAM    ( 1 )    /*!< Byte-stream. */
+/**@} */
+
+/**
+ * @anchor Protocols
+ * @name Protocols
+ *
+ * @brief Options for the lProtocol parameter of SOCKETS_Socket() function.
+ *
+ */
+/**@{ */
+#define SOCKETS_IPPROTO_UDP    ( 17 )   /*!< UDP. This option is currently not supported. */
+#define SOCKETS_IPPROTO_TCP    ( 6 )    /*!< TCP. */
+/**@} */
+
+/**
+ * @anchor SetSockOptOptions
+ * @name SetSockOptOptions
+ *
+ * @brief Options for lOptionName in SOCKETS_SetSockOpt().
+ *
+ */
+/**@{ */
+#define SOCKETS_SO_RCVTIMEO                      ( 0 )  /**< Set the receive timeout. */
+#define SOCKETS_SO_SNDTIMEO                      ( 1 )  /**< Set the send timeout. */
+#define SOCKETS_SO_SNDBUF                        ( 4 )  /**< Set the size of the send buffer (TCP only). */
+#define SOCKETS_SO_RCVBUF                        ( 5 )  /**< Set the size of the receive buffer (TCP only). */
+#define SOCKETS_SO_SERVER_NAME_INDICATION        ( 6 )  /**< Toggle client use of TLS SNI. */
+#define SOCKETS_SO_TRUSTED_SERVER_CERTIFICATE    ( 7 )  /**< Override default TLS server certificate trust. Must be PEM encoded and length must include null terminator. */
+#define SOCKETS_SO_REQUIRE_TLS                   ( 8 )  /**< Toggle client enforcement of TLS. */
+#define SOCKETS_SO_NONBLOCK                      ( 9 )  /**< Socket is nonblocking. */
+#define SOCKETS_SO_ALPN_PROTOCOLS                ( 10 ) /**< Application protocol list to be included in TLS ClientHello. */
+#define SOCKETS_SO_WAKEUP_CALLBACK               ( 17 ) /**< Set the callback to be called whenever there is data available on the socket for reading. */
+
+/**@} */
+
+/**
+ * @anchor ShutdownFlags <br>
+ * @name ShutdownFlags
+ *
+ * @brief Options for the ulHow parameter in SOCKETS_Shutdown().
+ */
+/**@{ */
+#define SOCKETS_SHUT_RD      ( 0 )  /**< No further receives. */
+#define SOCKETS_SHUT_WR      ( 1 )  /**< No further sends. */
+#define SOCKETS_SHUT_RDWR    ( 2 )  /**< No further send or receive. */
+/**@} */
+
+/**
+ * @brief Maximum length of an ASCII DNS name.
+ */
+#define securesocketsMAX_DNS_NAME_LENGTH    ( 253 )
+
+/**
+ * @ingroup SecureSockets_datatypes_paramstructs
+ * @brief Socket address.
+ *
+ * \sa PORT_SPECIFIC_LINK
+ */
+typedef struct SocketsSockaddr
+{
+    uint8_t ucLength;       /**< Length of SocketsSockaddr structure. */
+    uint8_t ucSocketDomain; /**< Only SOCKETS_AF_INET is supported. */
+    uint16_t usPort;        /**< Port number. Convention is to call this sin_port. */
+    uint32_t ulAddress;     /**< IP Address. Convention is to call this sin_addr. */
+} SocketsSockaddr_t;
+
+/**
+ * @brief Well-known port numbers.
+ */
+#define securesocketsDEFAULT_TLS_DESTINATION_PORT    443
+
+/**
+ * @brief Secure Sockets library initialization function.
+ *
+ * This function does general initialization and setup. It must be called once
+ * and only once before calling any other function.
+ *
+ * @return
+ * * `pdPASS` if everything succeeds
+ * * `pdFAIL` otherwise.
+ */
+lib_initDECLARE_LIB_INIT( SOCKETS_Init );
+
+/**
+ * @brief Creates a TCP socket.
+ *
+ * See the [FreeRTOS+TCP networking tutorial]
+ * (https://freertos.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/TCP_Networking_Tutorial.html)
+ * for more information on TCP sockets.
+ *
+ * See the [Berkeley Sockets API]
+ * (https://en.wikipedia.org/wiki/Berkeley_sockets#Socket_API_functions)
+ * in wikipedia
+ *
+ * @sa SOCKETS_Close()
+ *
+ * @param[in] lDomain Must be set to SOCKETS_AF_INET. See @ref SocketDomains.
+ * @param[in] lType Set to SOCKETS_SOCK_STREAM to create a TCP socket.
+ * No other value is valid.  See @ref SocketTypes.
+ * @param[in] lProtocol Set to SOCKETS_IPPROTO_TCP to create a TCP socket.
+ * No other value is valid. See @ref Protocols.
+ *
+ * @return
+ * * If a socket is created successfully, then the socket handle is
+ * returned
+ * * @ref SOCKETS_INVALID_SOCKET is returned if an error occurred.
+ */
+
+/*
+ * This call allocates memory and claims a socket resource.
+ */
+/* @[declare_secure_sockets_socket] */
+Socket_t SOCKETS_Socket( int32_t lDomain,
+                         int32_t lType,
+                         int32_t lProtocol );
+/* @[declare_secure_sockets_socket] */
+
+
+/**
+ * @brief Connects the socket to the specified IP address and port.
+ *
+ * The socket must first have been successfully created by a call to SOCKETS_Socket().
+ *
+ * \note To create a secure socket, SOCKETS_SetSockOpt() should be called with the
+ * SOCKETS_SO_REQUIRE_TLS option \a before SOCKETS_Connect() is called.
+ *
+ * If this function returns an error the socket is considered invalid.
+ *
+ * \warning SOCKETS_Connect() is not safe to be called on the same socket
+ * from multiple threads simultaneously with SOCKETS_Connect(),
+ * SOCKETS_SetSockOpt(), SOCKETS_Shutdown(), SOCKETS_Close().
+ *
+ * See the [Berkeley Sockets API]
+ * (https://en.wikipedia.org/wiki/Berkeley_sockets#Socket_API_functions)
+ * in wikipedia
+ *
+ * @param[in] xSocket The handle of the socket to be connected.
+ * @param[in] pxAddress A pointer to a SocketsSockaddr_t structure that contains the
+ * the address to connect the socket to.
+ * @param[in] xAddressLength Should be set to sizeof( @ref SocketsSockaddr_t ).
+ *
+ * @return
+ * * @ref SOCKETS_ERROR_NONE if a connection is established.
+ * * If an error occurred, a negative value is returned. @ref SocketsErrors
+ */
+/* @[declare_secure_sockets_connect] */
+int32_t SOCKETS_Connect( Socket_t xSocket,
+                         SocketsSockaddr_t * pxAddress,
+                         Socklen_t xAddressLength );
+/* @[declare_secure_sockets_connect] */
+
+/**
+ * @brief Receive data from a TCP socket.
+ *
+ * The socket must have already been created using a call to SOCKETS_Socket()
+ * and connected to a remote socket using SOCKETS_Connect().
+ *
+ * See the [Berkeley Sockets API]
+ * (https://en.wikipedia.org/wiki/Berkeley_sockets#Socket_API_functions)
+ * in wikipedia
+ *
+ * @param[in] xSocket The handle of the socket from which data is being received.
+ * @param[out] pvBuffer The buffer into which the received data will be placed.
+ * @param[in] xBufferLength The maximum number of bytes which can be received.
+ * pvBuffer must be at least xBufferLength bytes long.
+ * @param[in] ulFlags Not currently used. Should be set to 0.
+ *
+ * @return
+ * * If the receive was successful then the number of bytes received (placed in the
+ *   buffer pointed to by pvBuffer) is returned.
+ * * If a timeout occurred before data could be received then 0 is returned (timeout
+ *   is set using @ref SOCKETS_SO_RCVTIMEO).
+ * * If an error occurred, a negative value is returned. @ref SocketsErrors
+ */
+/* @[declare_secure_sockets_recv] */
+int32_t SOCKETS_Recv( Socket_t xSocket,
+                      void * pvBuffer,
+                      size_t xBufferLength,
+                      uint32_t ulFlags );
+/* @[declare_secure_sockets_recv] */
+
+/**
+ * @brief Transmit data to the remote socket.
+ *
+ * The socket must have already been created using a call to SOCKETS_Socket() and
+ * connected to a remote socket using SOCKETS_Connect().
+ *
+ * See the [Berkeley Sockets API]
+ * (https://en.wikipedia.org/wiki/Berkeley_sockets#Socket_API_functions)
+ * in wikipedia
+ *
+ * @param[in] xSocket The handle of the sending socket.
+ * @param[in] pvBuffer The buffer containing the data to be sent.
+ * @param[in] xDataLength The length of the data to be sent.
+ * @param[in] ulFlags Not currently used. Should be set to 0.
+ *
+ * @return
+ * * On success, the number of bytes actually sent is returned.
+ * * If an error occurred, a negative value is returned. @ref SocketsErrors
+ */
+/* @[declare_secure_sockets_send] */
+int32_t SOCKETS_Send( Socket_t xSocket,
+                      const void * pvBuffer,
+                      size_t xDataLength,
+                      uint32_t ulFlags );
+/* @[declare_secure_sockets_send] */
+
+/**
+ * @brief Closes all or part of a full-duplex connection on the socket.
+ *
+ * Disable reads and writes on a connected TCP socket. A connected TCP socket must be gracefully
+ * shut down before it can be closed.
+ *
+ * See the [Berkeley Sockets API]
+ * (https://en.wikipedia.org/wiki/Berkeley_sockets#Socket_API_functions)
+ * in wikipedia
+ *
+ * \warning SOCKETS_Shutdown() is not safe to be called on the same socket
+ * from multiple threads simultaneously with SOCKETS_Connect(),
+ * SOCKETS_SetSockOpt(), SOCKETS_Shutdown(), SOCKETS_Close().
+ *
+ * @param[in] xSocket The handle of the socket to shutdown.
+ * @param[in] ulHow SOCKETS_SHUT_RD, SOCKETS_SHUT_WR or SOCKETS_SHUT_RDWR.
+ * @ref ShutdownFlags
+ *
+ * @return
+ * * If the operation was successful, 0 is returned.
+ * * If an error occurred, a negative value is returned. @ref SocketsErrors
+ */
+/* @[declare_secure_sockets_shutdown] */
+int32_t SOCKETS_Shutdown( Socket_t xSocket,
+                          uint32_t ulHow );
+/* @[declare_secure_sockets_shutdown] */
+
+/**
+ * @brief Closes the socket and frees the related resources.
+ *
+ * A socket should be shutdown gracefully before it is closed, and cannot be used after it has been closed.
+ *
+ * See the [Berkeley Sockets API]
+ * (https://en.wikipedia.org/wiki/Berkeley_sockets#Socket_API_functions)
+ * in wikipedia
+ *
+ * \warning SOCKETS_Close() is not safe to be called on the same socket
+ * from multiple threads simultaneously with SOCKETS_Connect(),
+ * SOCKETS_SetSockOpt(), SOCKETS_Shutdown(), SOCKETS_Close().
+ *
+ * @param[in] xSocket The handle of the socket to close.
+ *
+ * @return
+ * * On success, 0 is returned.
+ * * If an error occurred, a negative value is returned. @ref SocketsErrors
+ */
+/* @[declare_secure_sockets_close] */
+int32_t SOCKETS_Close( Socket_t xSocket );
+/* @[declare_secure_sockets_close] */
+
+/**
+ * @brief AWS IoT ALPN protocol name for MQTT over TLS on server port 443.
+ */
+#define socketsAWS_IOT_ALPN_MQTT    "x-amzn-mqtt-ca"
+
+/**
+ * @brief Manipulates the options for the socket.
+ *
+ * See the [Berkeley Sockets API]
+ * (https://en.wikipedia.org/wiki/Berkeley_sockets#Socket_API_functions)
+ * in wikipedia
+ *
+ * @param[in] xSocket The handle of the socket to set the option for.
+ * @param[in] lLevel Not currently used. Should be set to 0.
+ * @param[in] lOptionName See @ref SetSockOptOptions.
+ * @param[in] pvOptionValue A buffer containing the value of the option to set.
+ * @param[in] xOptionLength The length of the buffer pointed to by pvOptionValue.
+ *
+ * \warning SOCKETS_Close() is not safe to be called on the same socket
+ * from multiple threads simultaneously with SOCKETS_Connect(),
+ * SOCKETS_SetSockOpt(), SOCKETS_Shutdown(), SOCKETS_Close().
+ *
+ * @note Socket option support and possible values vary by port. Please see
+ * PORT_SPECIFIC_LINK to check the valid options and limitations of your device.
+ *
+ *  - Berkeley Socket Options
+ *    - @ref SOCKETS_SO_RCVTIMEO
+ *      - Sets the receive timeout
+ *      - pvOptionValue (TickType_t) is the number of milliseconds that the
+ *      receive function should wait before timing out.
+ *      - Setting pvOptionValue = 0 causes receive to wait forever.
+ *      - See PORT_SPECIFIC_LINK for device limitations.
+ *    - @ref SOCKETS_SO_SNDTIMEO
+ *      - Sets the send timeout
+ *      - pvOptionValue (TickType_t) is the number of milliseconds that the
+ *      send function should wait before timing out.
+ *      - Setting pvOptionValue = 0 causes send to wait forever.
+ *      - See PORT_SPECIFIC_LINK for device limitations.
+ *  - Non-Standard Options
+ *    - @ref SOCKETS_SO_NONBLOCK
+ *      - Makes a socket non-blocking.
+ *      - Non-blocking connect is not supported - socket option should be
+ *        called after connect.
+ *      - pvOptionValue is ignored for this option.
+ *    - @ref SOCKETS_SO_WAKEUP_CALLBACK
+ *      - Set the callback to be called whenever there is data available on
+ *      the socket for reading
+ *      - This option provides an asynchronous way to handle received data
+ *      - pvOptionValue is a pointer to the callback function
+ *      - See PORT_SPECIFIC_LINK for device limitations.
+ *  - Security Sockets Options
+ *    - @ref SOCKETS_SO_REQUIRE_TLS
+ *      - Use TLS for all connect, send, and receive on this socket.
+ *      - This socket options MUST be set for TLS to be used, even
+ *        if other secure socket options are set.
+ *      - This socket option should be set before SOCKETS_Connect() is
+ *        called.
+ *      - pvOptionValue is ignored for this option.
+ *    - @ref SOCKETS_SO_TRUSTED_SERVER_CERTIFICATE
+ *      - Set the root of trust server certificate for the socket.
+ *      - This socket option only takes effect if @ref SOCKETS_SO_REQUIRE_TLS
+ *        is also set.  If @ref SOCKETS_SO_REQUIRE_TLS is not set,
+ *        this option will be ignored.
+ *      - pvOptionValue is a pointer to the formatted server certificate.
+ *        TODO: Link to description of how to format certificates with \n
+ *      - xOptionLength (BaseType_t) is the length of the certificate
+ *        in bytes.
+ *    - @ref SOCKETS_SO_SERVER_NAME_INDICATION
+ *      - Use Server Name Indication (SNI)
+ *      - This socket option only takes effect if @ref SOCKETS_SO_REQUIRE_TLS
+ *        is also set.  If @ref SOCKETS_SO_REQUIRE_TLS is not set,
+ *        this option will be ignored.
+ *      - pvOptionValue is a pointer to a string containing the hostname
+ *      - xOptionLength is the length of the hostname string in bytes.
+ *    - @ref SOCKETS_SO_ALPN_PROTOCOLS
+ *      - Negotiate an application protocol along with TLS.
+ *      - The ALPN list is expressed as an array of NULL-terminated ANSI
+ *        strings.
+ *      - xOptionLength is the number of items in the array.
+ *
+ * @return
+ * * On success, 0 is returned.
+ * * If an error occurred, a negative value is returned. @ref SocketsErrors
+ */
+/* @[declare_secure_sockets_setsockopt] */
+int32_t SOCKETS_SetSockOpt( Socket_t xSocket,
+                            int32_t lLevel,
+                            int32_t lOptionName,
+                            const void * pvOptionValue,
+                            size_t xOptionLength );
+/* @[declare_secure_sockets_setsockopt] */
+
+/**
+ * @brief Resolve a host name using Domain Name Service.
+ *
+ * See the [Berkeley Sockets API]
+ * (https://en.wikipedia.org/wiki/Berkeley_sockets#Socket_API_functions)
+ * in wikipedia
+ *
+ * @param[in] pcHostName The host name to resolve.
+ * @return
+ * * The IPv4 address of the specified host.
+ * * If an error has occurred, 0 is returned.
+ */
+/* @[declare_secure_sockets_gethostbyname] */
+uint32_t SOCKETS_GetHostByName( const char * pcHostName );
+/* @[declare_secure_sockets_gethostbyname] */
+
+
+
+/**
+ * @brief Convert an unsigned thirty-two-bit value from host endianness to network
+ * endianness.
+ *
+ * @param[in] usIn The unsigned thirty-two-bit value to convert.
+ */
+#if defined( socketsconfigBYTE_ORDER ) && ( socketsconfigBYTE_ORDER == pdLITTLE_ENDIAN )
+    #define SOCKETS_htonl( ulIn )    ( ( uint32_t ) ( ( ( ulIn & 0xFF ) << 24 ) | ( ( ulIn & 0xFF00 ) << 8 ) | ( ( ulIn & 0xFF0000 ) >> 8 ) | ( ( ulIn & 0xFF000000 ) >> 24 ) ) )
+#else
+    #define SOCKETS_htonl( usIn )    ( ( uint32_t ) ( usIn ) )
+#endif
+
+/**
+ * @brief Convert an unsigned thirty-two-bit value from network endianness to host
+ * endianness.
+ *
+ * @param[in] usIn The unsigned thirty-two-bit value to convert.
+ */
+#define SOCKETS_ntohl( usIn )    SOCKETS_htonl( usIn )
+
+
+/**
+ * @brief Convert an unsigned sixteen-bit value from host endianness to network
+ * endianness.
+ *
+ * @param[in] usIn The unsigned sixteen-bit value to convert.
+ */
+
+#if defined( socketsconfigBYTE_ORDER ) && ( socketsconfigBYTE_ORDER == pdLITTLE_ENDIAN )
+    #define SOCKETS_htons( usIn )    ( ( uint16_t ) ( ( ( usIn ) << 8U ) | ( ( usIn ) >> 8U ) ) )
+#else
+    #define SOCKETS_htons( usIn )    ( ( uint16_t ) ( usIn ) )
+#endif
+
+
+/**
+ * @brief Convert an unsigned sixteen-bit value from network endianness to host
+ * endianness.
+ *
+ * @param[in] usIn The unsigned sixteen-bit value to convert.
+ */
+#define SOCKETS_ntohs( usIn )    SOCKETS_htons( usIn )
+
+/**
+ * @brief Convert an IP address expressed as four separate numeric octets into a an IP address expressed as a 32-bit number in network byte order
+ * (for example 192, 168, 0, 100)
+ *
+ * @param[in] ucOctet0 0th IP Octet
+ * @param[in] ucOctet1 1st IP Octet
+ * @param[in] ucOctet2 2nd IP Octet
+ * @param[in] ucOctet3 3rd IP Octet
+ */
+#if defined( socketsconfigBYTE_ORDER ) && ( socketsconfigBYTE_ORDER == pdLITTLE_ENDIAN )
+
+    #define SOCKETS_inet_addr_quick( ucOctet0, ucOctet1, ucOctet2, ucOctet3 ) \
+    ( ( ( ( uint32_t ) ( ucOctet3 ) ) << 24UL ) |                             \
+      ( ( ( uint32_t ) ( ucOctet2 ) ) << 16UL ) |                             \
+      ( ( ( uint32_t ) ( ucOctet1 ) ) << 8UL ) |                              \
+      ( ( uint32_t ) ( ucOctet0 ) ) )
+
+/**
+ * @brief Convert an IP address expressed as a 32-bit number in network byte order to a string in decimal dot notation.
+ * (for example "192.168.0.100")
+ *
+ * @param[in] ulIPAddress An IP address expressed as a 32-bit value in network byte order.
+ * @param[in] pucBuffer A pointer to a buffer into which the IP address will be written in decimal dot notation.
+ */
+    #define SOCKETS_inet_ntoa( ulIPAddress, pucBuffer )               \
+    sprintf( ( char * ) ( pucBuffer ), "%u.%u.%u.%u",                 \
+             ( ( unsigned ) ( ( ulIPAddress ) & 0xffUL ) ),           \
+             ( ( unsigned ) ( ( ( ulIPAddress ) >> 8 ) & 0xffUL ) ),  \
+             ( ( unsigned ) ( ( ( ulIPAddress ) >> 16 ) & 0xffUL ) ), \
+             ( ( unsigned ) ( ( ulIPAddress ) >> 24 ) ) )
+
+#else /* socketsconfigBYTE_ORDER. */
+
+    #define SOCKETS_inet_addr_quick( ucOctet0, ucOctet1, ucOctet2, ucOctet3 ) \
+    ( ( ( ( uint32_t ) ( ucOctet0 ) ) << 24UL ) |                             \
+      ( ( ( uint32_t ) ( ucOctet1 ) ) << 16UL ) |                             \
+      ( ( ( uint32_t ) ( ucOctet2 ) ) << 8UL ) |                              \
+      ( ( uint32_t ) ( ucOctet3 ) ) )
+
+/**
+ * @brief Convert an IP address expressed as a 32-bit number in network byte order to a string in decimal dot notation.
+ * (for example "192.168.0.100")
+ *
+ * @param[in] ulIPAddress An IP address expressed as a 32-bit value in network byte order.
+ * @param[in] pucBuffer A pointer to a buffer into which the IP address will be written in decimal dot notation.
+ */
+    #define SOCKETS_inet_ntoa( ulIPAddress, pucBuffer )               \
+    sprintf( ( char * ) ( pucBuffer ), "%u.%u.%u.%u",                 \
+             ( ( unsigned ) ( ( ulIPAddress ) >> 24 ) ),              \
+             ( ( unsigned ) ( ( ( ulIPAddress ) >> 16 ) & 0xffUL ) ), \
+             ( ( unsigned ) ( ( ( ulIPAddress ) >> 8 ) & 0xffUL ) ),  \
+             ( ( unsigned ) ( ( ulIPAddress ) & 0xffUL ) ) )
+
+#endif /* socketsconfigBYTE_ORDER. */
+
+/*
+ #ifdef __cplusplus
+ *  }
+ #endif
+ */
+
+#endif /* _AWS_SECURE_SOCKETS_H_ */
diff --git a/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/secure_sockets/include/iot_secure_sockets_config_defaults.h b/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/secure_sockets/include/iot_secure_sockets_config_defaults.h
new file mode 100644
index 000000000..498ac5dfc
--- /dev/null
+++ b/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/secure_sockets/include/iot_secure_sockets_config_defaults.h
@@ -0,0 +1,72 @@
+/*
+ * Amazon FreeRTOS Secure Sockets V1.1.5
+ * Copyright (C) 2018 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://aws.amazon.com/freertos
+ * http://www.FreeRTOS.org
+ */
+
+/**
+ * @file iot_secure_sockets_config_defaults.h
+ * @brief Ensures that the required sockets configuration options are supplied
+ * and the optional ones are set to sane values if the user does not supply.
+ */
+
+#ifndef AWS_INC_SECURE_SOCKETS_CONFIG_DEFAULTS_H_
+#define AWS_INC_SECURE_SOCKETS_CONFIG_DEFAULTS_H_
+
+/**
+ * @brief Byte order of the target MCU must be defined.
+ *
+ * Valid values are pdLITTLE_ENDIAN and pdBIG_ENDIAN.
+ */
+#ifndef socketsconfigBYTE_ORDER
+    #error "socketsconfigBYTE_ORDER must be defined."
+#endif
+
+/**
+ * @brief Default socket send timeout.
+ *
+ * The user can change the send timeout for a socket using the SOCKETS_SetSockOpt API
+ * with the SOCKETS_SO_SNDTIMEO option.
+ */
+#ifndef socketsconfigDEFAULT_SEND_TIMEOUT
+    #define socketsconfigDEFAULT_SEND_TIMEOUT    ( 10000 )
+#endif
+
+/**
+ * @brief Default socket receive timeout.
+ *
+ * The user can change the receive timeout for a socket using the SOCKETS_SetSockOpt API
+ * with the SOCKETS_SO_RCVTIMEO option.
+ */
+#ifndef socketsconfigDEFAULT_RECV_TIMEOUT
+    #define socketsconfigDEFAULT_RECV_TIMEOUT    ( 10000 )
+#endif
+
+/**
+ * @brief By default, metrics of secure socket is disabled.
+ *
+ */
+#ifndef AWS_IOT_SECURE_SOCKETS_METRICS_ENABLED
+    #define AWS_IOT_SECURE_SOCKETS_METRICS_ENABLED    ( 0 )
+#endif
+
+#endif /* AWS_INC_SECURE_SOCKETS_CONFIG_DEFAULTS_H_ */
diff --git a/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/secure_sockets/include/iot_secure_sockets_wrapper_metrics.h b/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/secure_sockets/include/iot_secure_sockets_wrapper_metrics.h
new file mode 100644
index 000000000..a5282a23c
--- /dev/null
+++ b/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/abstractions/secure_sockets/include/iot_secure_sockets_wrapper_metrics.h
@@ -0,0 +1,43 @@
+/*
+ * Amazon FreeRTOS Secure Sockets V1.1.5
+ * Copyright (C) 2018 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://aws.amazon.com/freertos
+ * http://www.FreeRTOS.org
+ */
+
+#ifndef _AWS_SECURE_SOCKETS_WRAPPER_METRICS_
+#define _AWS_SECURE_SOCKETS_WRAPPER_METRICS_
+
+/* This file redefines Secure Sockets functions to be called through a wrapper macro,
+ * but only if metrics is enabled explicitly. */
+#if AWS_IOT_SECURE_SOCKETS_METRICS_ENABLED == 1
+
+/* This macro is included in aws_secure_socket.c and aws_secure_socket_wrapper_metrics.c.
+ * It will prevent the redefine in those source files. */
+    #ifndef _SECURE_SOCKETS_WRAPPER_NOT_REDEFINE
+        #define SOCKETS_Init        Sockets_MetricsInit
+        #define SOCKETS_Connect     Sockets_MetricsConnect
+        #define SOCKETS_Shutdown    Sockets_MetricsShutdown
+    #endif
+
+#endif
+
+#endif /* ifndef _AWS_SECURE_SOCKETS_WRAPPER_METRICS_ */
diff --git a/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/c_sdk/standard/common/include/private/iot_lib_init.h b/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/c_sdk/standard/common/include/private/iot_lib_init.h
new file mode 100644
index 000000000..2930d7415
--- /dev/null
+++ b/FreeRTOS-Plus/Source/FreeRTOS-Plus-IoT-SDK/c_sdk/standard/common/include/private/iot_lib_init.h
@@ -0,0 +1,33 @@
+/*
+ * Amazon FreeRTOS Common V1.0.0
+ * Copyright (C) 2018 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://aws.amazon.com/freertos
+ * http://www.FreeRTOS.org
+ */
+
+#ifndef _AWS_LIB_INIT_H_
+#define _AWS_LIB_INIT_H_
+
+#include "FreeRTOS.h"
+
+#define lib_initDECLARE_LIB_INIT( f )    extern BaseType_t f( void )
+
+#endif /* _AWS_LIB_INIT_H_ */