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diff --git a/FreeRTOS-Plus/Demo/AWS/Fleet_Provisioning_Windows_Simulator/Fleet_Provisioning_With_CSR_Demo/mqtt_operations.h b/FreeRTOS-Plus/Demo/AWS/Fleet_Provisioning_Windows_Simulator/Fleet_Provisioning_With_CSR_Demo/mqtt_operations.h
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+++ b/FreeRTOS-Plus/Demo/AWS/Fleet_Provisioning_Windows_Simulator/Fleet_Provisioning_With_CSR_Demo/mqtt_operations.h
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+/*
+ * FreeRTOS V202111.00
+ * Copyright (C) 2020 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.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+#ifndef MQTT_OPERATIONS_H_
+#define MQTT_OPERATIONS_H_
+
+/* MQTT API header. */
+#include "core_mqtt.h"
+
+/* corePKCS11 include. */
+#include "core_pkcs11.h"
+
+/**
+ * @brief Application callback type to handle the incoming publishes.
+ *
+ * @param[in] pxPublishInfo Pointer to publish info of the incoming publish.
+ * @param[in] usPacketIdentifier Packet identifier of the incoming publish.
+ */
+typedef void (* MQTTPublishCallback_t )( MQTTPublishInfo_t * pxPublishInfo,
+                                         uint16_t usPacketIdentifier );
+
+/**
+ * @brief Establish a MQTT connection.
+ *
+ * @param[in] xPublishCallback The callback function to receive incoming
+ * publishes from the MQTT broker.
+ * @param[in] pcClientCertLabel The client certificate PKCS #11 label to use.
+ * @param[in] pcPrivateKeyLabel The private key PKCS #11 label for the client certificate.
+ *
+ * @return true if an MQTT session is established;
+ * false otherwise.
+ */
+bool xEstablishMqttSession( MQTTPublishCallback_t xPublishCallback,
+                            char * pcClientCertLabel,
+                            char * pcPrivateKeyLabel );
+
+/**
+ * @brief Disconnect the MQTT connection.
+ *
+ * @return true if the MQTT session was successfully disconnected;
+ * false otherwise.
+ */
+bool xDisconnectMqttSession( void );
+
+/**
+ * @brief Subscribe to a MQTT topic filter.
+ *
+ * @param[in] pcTopicFilter The topic filter to subscribe to.
+ * @param[in] usTopicFilterLength Length of the topic buffer.
+ *
+ * @return true if subscribe operation was successful;
+ * false otherwise.
+ */
+bool xSubscribeToTopic( const char * pcTopicFilter,
+                        uint16_t usTopicFilterLength );
+
+/**
+ * @brief Unsubscribe from a MQTT topic filter.
+ *
+ * @param[in] pcTopicFilter The topic filter to unsubscribe from.
+ * @param[in] usTopicFilterLength Length of the topic buffer.
+ *
+ * @return true if unsubscribe operation was successful;
+ * false otherwise.
+ */
+bool xUnsubscribeFromTopic( const char * pcTopicFilter,
+                            uint16_t usTopicFilterLength );
+
+/**
+ * @brief Publish a message to a MQTT topic.
+ *
+ * @param[in] pcTopic The topic to publish the message on.
+ * @param[in] usTopicLength Length of the topic.
+ * @param[in] pcMessage The message to publish.
+ * @param[in] xMessageLength Length of the message.
+ *
+ * @return true if PUBLISH was successfully sent;
+ * false otherwise.
+ */
+bool xPublishToTopic( const char * pcTopic,
+                      uint16_t usTopicLength,
+                      const char * pcMessage,
+                      size_t xMessageLength );
+
+/**
+ * @brief Invoke the core MQTT library's process loop function.
+ *
+ * @return true if process loop was successful;
+ * false otherwise.
+ */
+bool xProcessLoop( void );
+
+#endif /* ifndef MQTT_OPERATIONS_H_ */