dev/etherpkt.hh

   1 /*
   2  * Copyright (c) 2002-2004 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 "base/inet.hh"
  42 #include "sim/host.hh"
  43
  44 /*
  45  * Reference counted class containing ethernet packet data
  46  */
  47 class Checkpoint;
  48 class PacketData : public RefCounted
  49 {
  50   public:
  51     uint8_t *data;
  52     int length;
  53
  54   public:
  55     PacketData() : data(NULL), length(0) { }
  56     PacketData(std::auto_ptr<uint8_t> d, int l)
  57         : data(d.release()), length(l) { }
  58     ~PacketData() { if (data) delete [] data; }
  59
  60   public:
  61     const EthHdr *eth() const { return (const EthHdr *)data; }
  62     const IpHdr *ip() const {const EthHdr *h = eth(); return h ? h->ip() : 0;}
  63     const TcpHdr *tcp() const {const IpHdr *h = ip(); return h ? h->tcp() : 0;}
  64     const UdpHdr *udp() const {const IpHdr *h = ip(); return h ? h->udp() : 0;}
  65
  66     EthHdr *eth() { return (EthHdr *)data; }
  67     IpHdr *ip()   { EthHdr *h = eth(); return h ? h->ip() : 0; }
  68     TcpHdr *tcp() { IpHdr *h = ip(); return h ? h->tcp() : 0; }
  69     UdpHdr *udp() { IpHdr *h = ip(); return h ? h->udp() : 0; }
  70
  71   public:
  72     void serialize(std::ostream &os);
  73     void unserialize(Checkpoint *cp, const std::string &section);
  74 };
  75
  76 typedef RefCountingPtr<PacketData> PacketPtr;
  77
  78 #endif // __ETHERPKT_HH__