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diff --git a/src/libzrtpcpp/ZrtpPacketBase.h b/src/libzrtpcpp/ZrtpPacketBase.h
new file mode 100644
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+++ b/src/libzrtpcpp/ZrtpPacketBase.h
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+/*
+  Copyright (C) 2006-2010 Werner Dittmann
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+ * Authors: Werner Dittmann <Werner.Dittmann@t-online.de>
+ */
+
+#ifndef _ZRTPPACKETBASE_H_
+#define _ZRTPPACKETBASE_H_
+
+/**
+ * @file ZrtpPacketBase.h
+ * @brief The ZRTP message header class
+ *
+ * This class defines the ZRTP message header and provides access and
+ * check methods.
+ *
+ * @ingroup GNU_ZRTP
+ * @{
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+
+#if defined(_MSC_VER) || defined(WIN32) || defined(_WIN32)
+#include <winsock2.h>
+#else
+#include <netinet/in.h>
+#endif
+
+#include <libzrtpcpp/zrtpPacket.h>
+#include <libzrtpcpp/ZrtpTextData.h>
+#include <libzrtpcpp/ZrtpConfigure.h>
+#include <libzrtpcpp/ZrtpCrc32.h>
+
+// #define DEBUGOUT(deb)   deb
+#define DEBUGOUT(deb)
+
+/*
+ * This is the unique ZRTP ID in network order (PZ)
+ */
+const uint16_t zrtpId = 0x505a;
+
+/**
+ * This is the base class for all ZRTP packets
+ *
+ * All other ZRTP packet classes inherit from this class. It does not have
+ * an implementation of its own.
+ *
+ * The standard constructors of the subclasses usually initialize the @c allocate
+ * field with their fixed data array which is large enough to hold all message
+ * data. If an implementation needs to change this to use dynamic memory
+ * allocation only that line in the subclasses must be changed and the destructors
+ * should take care of memory management.
+ *
+ * @author Werner Dittmann <Werner.Dittmann@t-online.de>
+ */
+
+class __EXPORT ZrtpPacketBase {
+
+  private:
+
+  protected:
+      void* allocated;                  ///< Pointer to ZRTP message data
+      zrtpPacketHeader_t* zrtpHeader;   ///< points to the fixed ZRTP header structure
+
+  public:
+    /**
+     * Destructor is empty
+     */
+    virtual ~ZrtpPacketBase() {};
+
+    /**
+     * Get pointer to ZRTP header
+     *
+     * @return
+     *     Pointer to ZRTP header structure.
+     */
+    const uint8_t* getHeaderBase() { return (const uint8_t*)zrtpHeader; };
+
+    /**
+     * Check is this is a ZRTP message
+     *
+     * @return
+     *     @c true if check was ok
+     */
+    bool isZrtpPacket()            { return (ntohs(zrtpHeader->zrtpId) == zrtpId); };
+
+    /**
+     * Get the length in words of the ZRTP message
+     *
+     * @return
+     *     The length in words
+     */
+    uint16_t getLength()           { return ntohs(zrtpHeader->length); };
+
+    /**
+     * Return pointer to fixed length message type ASCII data
+     *
+     * @return
+     *     Pointer to ASCII character array
+     */
+    uint8_t* getMessageType()      { return zrtpHeader->messageType; };
+
+    /**
+     * Set the lenght field in the ZRTP header
+     *
+     * @param len
+     *     The length of the ZRTP message in words, host order
+     */
+    void setLength(uint16_t len)  { zrtpHeader->length = htons(len); };
+
+    /**
+     * Copy the message type ASCII data to ZRTP message type field
+     *
+     * @param msg
+     *     Pointer to message type ASCII character array
+     */
+    void setMessageType(uint8_t *msg)
+        { memcpy(zrtpHeader->messageType, msg, sizeof(zrtpHeader->messageType)); };
+
+    /**
+     * Initializes the ZRTP Id field
+     */
+    void setZrtpId()              { zrtpHeader->zrtpId = htons(zrtpId); }
+};
+
+/**
+ * @}
+ */
+#endif // ZRTPPACKETBASE