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diff --git a/src/dev/net/etherpkt.hh b/src/dev/net/etherpkt.hh
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+/*
+ * Copyright (c) 2002-2005 The Regents of The University of Michigan
+ * 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 copyright holders 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
+ * OWNER 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.
+ *
+ * Authors: Nathan Binkert
+ *          Lisa Hsu
+ */
+
+/* @file
+ * Reference counted class containing ethernet packet data
+ */
+
+#ifndef __DEV_NET_ETHERPKT_HH__
+#define __DEV_NET_ETHERPKT_HH__
+
+#include <cassert>
+#include <iosfwd>
+#include <memory>
+
+#include "base/types.hh"
+#include "sim/serialize.hh"
+
+/*
+ * Reference counted class containing ethernet packet data
+ */
+class EthPacketData
+{
+  public:
+    /*
+     * Pointer to packet data will be deleted
+     */
+    uint8_t *data;
+
+    /*
+     * Length of the current packet
+     */
+    unsigned length;
+
+  public:
+    EthPacketData()
+        : data(NULL), length(0)
+    { }
+
+    explicit EthPacketData(unsigned size)
+        : data(new uint8_t[size]), length(0)
+    { }
+
+    ~EthPacketData() { if (data) delete [] data; }
+
+  public:
+    /**
+     * This function pulls out the MAC source and destination addresses from
+     * the packet data and stores them in the caller specified buffers.
+     *
+     * @param src_addr The buffer to store the source MAC address.
+     * @param dst_addr The buffer to store the destination MAC address.
+     * @param length This is an inout parameter. The caller stores in this
+     * the size of the address buffers. On return, this will contain the
+     * actual address size stored in the buffers. (We assume that source
+     * address size is equal to that of the destination address.)
+     */
+    void packAddress(uint8_t *src_addr, uint8_t *dst_addr, unsigned &length);
+
+    void serialize(const std::string &base, CheckpointOut &cp) const;
+    void unserialize(const std::string &base, CheckpointIn &cp);
+
+    unsigned size() const { return length; }
+};
+
+typedef std::shared_ptr<EthPacketData> EthPacketPtr;
+
+#endif // __DEV_NET_ETHERPKT_HH__