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diff --git a/SDL_Core/src/components/protocol_handler/include/protocol_handler/protocol_handler.h b/SDL_Core/src/components/protocol_handler/include/protocol_handler/protocol_handler.h
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+/**
+ * \file protocol_handler.h
+ * \brief ProtocolHandler class header file.
+ *
+ * Copyright (c) 2013, Ford Motor Company
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * Neither the name of the Ford Motor Company nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef SRC_COMPONENTS_PROTOCOL_HANDLER_INCLUDE_PROTOCOL_HANDLER_PROTOCOL_HANDLER
+#define SRC_COMPONENTS_PROTOCOL_HANDLER_INCLUDE_PROTOCOL_HANDLER_PROTOCOL_HANDLER
+
+#include "protocol_handler/raw_message.h"
+
+/**
+ *\namespace NsProtocolHandler
+ *\brief Namespace for SmartDeviceLink ProtocolHandler related functionality.
+ */
+namespace protocol_handler {
+
+class ProtocolObserver;
+
+/**
+ * \class ProtocolHandler
+ * \brief Interface for component parsing protocol header
+ * on the messages between SDL and mobile application.
+ */
+class ProtocolHandler {
+  public:
+    /**
+     * \brief Adds pointer to higher layer handler for message exchange
+     * \param observer Pointer to object of the class implementing
+     * IProtocolObserver
+     */
+    virtual void AddProtocolObserver(ProtocolObserver* observer) = 0;
+
+    /**
+     * \brief Removes pointer to higher layer handler for message exchange
+     * \param observer Pointer to object of the class implementing
+     * IProtocolObserver.
+     */
+    virtual void RemoveProtocolObserver(ProtocolObserver* observer) = 0;
+
+    /**
+     * \brief Method for sending message to Mobile Application.
+     * \param message RawMessage with params to be sent to Mobile App.
+     * \param final_message tells whether message's
+     * connection must be closed when message is processed
+     */
+    virtual void SendMessageToMobileApp(const RawMessagePtr& message,
+                                        bool final_message) = 0;
+
+    /**
+     * \brief Sends number of processed frames in case of binary nav streaming
+     * \param connection_key Id of connection over which message is to be sent
+     * \param number_of_frames Number of frames processed by
+     * streaming server and displayed to user.
+     */
+    virtual void SendFramesNumber(int32_t connection_key, int32_t number_of_frames) = 0;
+
+  protected:
+    /**
+     * \brief Destructor
+     */
+    virtual ~ProtocolHandler() {
+    }
+};
+}  //  namespace protocol_handler
+
+#endif  //  SRC_COMPONENTS_PROTOCOL_HANDLER_INCLUDE_PROTOCOL_HANDLER_PROTOCOL_HANDLER