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diff --git a/FreeRTOS-Plus/Source/FreeRTOS-IoT-Libraries-LTS-Beta2/c_sdk/platform/transport_interface.h b/FreeRTOS-Plus/Source/FreeRTOS-IoT-Libraries-LTS-Beta2/c_sdk/platform/transport_interface.h
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+++ b/FreeRTOS-Plus/Source/FreeRTOS-IoT-Libraries-LTS-Beta2/c_sdk/platform/transport_interface.h
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+/*
+ * 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.
+ */
+
+#ifndef TRANSPORT_INTERFACE_H_
+#define TRANSPORT_INTERFACE_H_
+
+#include <stdint.h>
+#include <stddef.h>
+
+/**
+ * @brief The NetworkContext is an incomplete type. An implementation of this
+ * interface must define NetworkContext as per the requirements. This context
+ * is passed into the network interface functions.
+ */
+struct NetworkContext;
+typedef struct NetworkContext NetworkContext_t;
+
+/**
+ * @brief Transport interface for receiving data on the network.
+ *
+ * @param[in] pNetworkContext Implementation-defined network context.
+ * @param[in] pBuffer Buffer to receive the data into.
+ * @param[in] bytesToRecv Number of bytes requested from the network.
+ *
+ * @return The number of bytes received or a negative error code.
+ */
+typedef int32_t ( * TransportRecv_t )( NetworkContext_t * pNetworkContext,
+                                       void * pBuffer,
+                                       size_t bytesToRecv );
+
+/**
+ * @brief Transport interface for sending data over the network.
+ *
+ * @param[in] pNetworkContext Implementation-defined network context.
+ * @param[in] pBuffer Buffer containing the bytes to send over the network stack.
+ * @param[in] bytesToSend Number of bytes to send over the network.
+ *
+ * @return The number of bytes sent or a negative error code.
+ */
+typedef int32_t ( * TransportSend_t )( NetworkContext_t * pNetworkContext,
+                                       const void * pBuffer,
+                                       size_t bytesToSend );
+
+/**
+ * @brief The transport layer interface.
+ */
+typedef struct TransportInterface
+{
+    TransportRecv_t recv;               /**< Transport receive interface. */
+    TransportSend_t send;               /**< Transport send interface. */
+    NetworkContext_t * pNetworkContext; /**< Implementation-defined network context. */
+} TransportInterface_t;
+
+#endif /* ifndef TRANSPORT_INTERFACE_H_ */