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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;
/**
* Total size of the allocated data buffer.
*/
unsigned bufLength;
/**
* Amount of space occupied by the payload in the data buffer
*/
unsigned length;
/**
* Effective length, used for modeling timing in the simulator.
* This could be different from length if the packets are assumed
* to use a tightly packed or compressed format, but it's not worth
* the performance/complexity hit to perform that packing or compression
* in the simulation.
*/
unsigned simLength;
EthPacketData()
: data(nullptr), bufLength(0), length(0), simLength(0)
{ }
explicit EthPacketData(unsigned size)
: data(new uint8_t[size]), bufLength(size), length(0), simLength(0)
{ }
~EthPacketData() { if (data) delete [] data; }
void serialize(const std::string &base, CheckpointOut &cp) const;
void unserialize(const std::string &base, CheckpointIn &cp);
};
typedef std::shared_ptr<EthPacketData> EthPacketPtr;
#endif // __DEV_NET_ETHERPKT_HH__
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