etherpkt.hh revision 1078
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 */ 47class Checkpoint; 48class PacketData : public RefCounted 49{ 50 public: 51 uint8_t *data; 52 int length; 53 54 protected: 55 uint8_t *_eth; 56 uint8_t *_ip; 57 uint8_t *_tcp; 58 uint8_t *_udp; 59 60 void doext(); 61 void ext() 62 { 63 if (_eth != data) 64 doext(); 65 } 66 67 public: 68 PacketData() : data(NULL), length(0) { doext(); } 69 PacketData(std::auto_ptr<uint8_t> d, int l) 70 : data(d.release()), length(l) { doext(); } 71 ~PacketData() { if (data) delete [] data; } 72 73 public: 74 EthHdr *eth() { ext(); return (EthHdr *)_eth; } 75 IpHdr *ip() { ext(); return (IpHdr *)_ip; } 76 TcpHdr *tcp() { ext(); return (TcpHdr *)_tcp; } 77 UdpHdr *udp() { ext(); return (UdpHdr *)_udp; } 78 79 public: 80 void serialize(std::ostream &os); 81 void unserialize(Checkpoint *cp, const std::string §ion); 82}; 83 84typedef RefCountingPtr<PacketData> PacketPtr; 85 86#endif // __ETHERPKT_HH__ 87