src/dev/etherpkt.cc

   1 /*
   2  * Copyright (c) 2004-2005 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Authors: Nathan Binkert
  29  */
  30
  31 #include <iostream>
  32
  33 #include "base/misc.hh"
  34 #include "base/inet.hh"
  35 #include "dev/etherpkt.hh"
  36 #include "sim/serialize.hh"
  37
  38 using namespace std;
  39
  40 void
  41 EthPacketData::serialize(const string &base, CheckpointOut &cp) const
  42 {
  43     paramOut(cp, base + ".length", length);
  44     arrayParamOut(cp, base + ".data", data, length);
  45 }
  46
  47 void
  48 EthPacketData::unserialize(const string &base, CheckpointIn &cp)
  49 {
  50     paramIn(cp, base + ".length", length);
  51     if (length)
  52         arrayParamIn(cp, base + ".data", data, length);
  53 }
  54
  55 void
  56 EthPacketData::packAddress(uint8_t *src_addr,
  57                            uint8_t *dst_addr,
  58                            unsigned &nbytes)
  59 {
  60     Net::EthHdr *hdr = (Net::EthHdr *)data;
  61     assert(hdr->src().size() == hdr->dst().size());
  62     if (nbytes < hdr->src().size())
  63         panic("EthPacketData::packAddress() Buffer overflow");
  64
  65     memcpy(dst_addr, hdr->dst().bytes(), hdr->dst().size());
  66     memcpy(src_addr, hdr->src().bytes(), hdr->src().size());
  67
  68     nbytes = hdr->src().size();
  69 }
  70