gem5/dev/etherpkt.cc

/*
 * Copyright (c) 2004 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.
 */

#include <iostream>

#include "dev/etherpkt.hh"
#include "sim/serialize.hh"

using namespace std;

void
PacketData::doext()
{
    _eth = 0;
    _ip = 0;
    _tcp = 0;
    _udp = 0;

    if (!data)
        return;

    _eth = data;
    if (eth()->type() == ETH_TYPE_IP) {
        _ip = eth()->payload();

        if (ip()->proto() == IP_PROTO_TCP)
            _tcp = ip()->payload();

        if (ip()->proto() == IP_PROTO_UDP)
            _udp = ip()->payload();
    }
}

void
PacketData::serialize(ostream &os)
{
    SERIALIZE_SCALAR(length);
    SERIALIZE_ARRAY(data, length);
}

void
PacketData::unserialize(Checkpoint *cp, const string &section)
{
    UNSERIALIZE_SCALAR(length);
    data = new uint8_t[length];
    UNSERIALIZE_ARRAY(data, length);
}