src/dev/etherpkt.hh

   1 /*
   2  * Copyright (c) 2002-2005 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
  29 /* @file
  30  * Reference counted class containing ethernet packet data
  31  */
  32
  33 #ifndef __ETHERPKT_HH__
  34 #define __ETHERPKT_HH__
  35
  36 #include <iosfwd>
  37 #include <memory>
  38 #include <assert.h>
  39
  40 #include "base/refcnt.hh"
  41 #include "sim/host.hh"
  42
  43 /*
  44  * Reference counted class containing ethernet packet data
  45  */
  46 class Checkpoint;
  47 class EthPacketData : public RefCounted
  48 {
  49   public:
  50     /*
  51      * Pointer to packet data will be deleted
  52      */
  53     uint8_t *data;
  54
  55     /*
  56      * Length of the current packet
  57      */
  58     int length;
  59
  60     /*
  61      * Extra space taken up by the packet in whatever data structure
  62      * it is in.
  63      *
  64      * NOTE: This can only be use by *one* data structure at a time!
  65      */
  66     int slack;
  67
  68   public:
  69     EthPacketData() : data(NULL), length(0), slack(0) { }
  70     explicit EthPacketData(size_t size)
  71         : data(new uint8_t[size]), length(0), slack(0) { }
  72     EthPacketData(std::auto_ptr<uint8_t> d, int l, int s = 0)
  73         : data(d.release()), length(l), slack(s) { }
  74     ~EthPacketData() { if (data) delete [] data; }
  75
  76   public:
  77     void serialize(const std::string &base, std::ostream &os);
  78     void unserialize(const std::string &base, Checkpoint *cp,
  79                      const std::string &section);
  80 };
  81
  82 typedef RefCountingPtr<EthPacketData> EthPacketPtr;
  83
  84 #endif // __ETHERPKT_HH__