etherpkt.hh revision 11701:5e7599457b97
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 * Authors: Nathan Binkert 29 * Lisa Hsu 30 */ 31 32/* @file 33 * Reference counted class containing ethernet packet data 34 */ 35 36#ifndef __DEV_NET_ETHERPKT_HH__ 37#define __DEV_NET_ETHERPKT_HH__ 38 39#include <cassert> 40#include <iosfwd> 41#include <memory> 42 43#include "base/types.hh" 44#include "sim/serialize.hh" 45 46/* 47 * Reference counted class containing ethernet packet data 48 */ 49class EthPacketData 50{ 51 public: 52 /** 53 * Pointer to packet data will be deleted 54 */ 55 uint8_t *data; 56 57 /** 58 * Amount of space occupied by the payload in the data buffer 59 */ 60 unsigned length; 61 62 /** 63 * Effective length, used for modeling timing in the simulator. 64 * This could be different from length if the packets are assumed 65 * to use a tightly packed or compressed format, but it's not worth 66 * the performance/complexity hit to perform that packing or compression 67 * in the simulation. 68 */ 69 unsigned simLength; 70 71 EthPacketData() 72 : data(nullptr), length(0), simLength(0) 73 { } 74 75 explicit EthPacketData(unsigned size) 76 : data(new uint8_t[size]), length(0), simLength(0) 77 { } 78 79 ~EthPacketData() { if (data) delete [] data; } 80 81 void serialize(const std::string &base, CheckpointOut &cp) const; 82 void unserialize(const std::string &base, CheckpointIn &cp); 83}; 84 85typedef std::shared_ptr<EthPacketData> EthPacketPtr; 86 87#endif // __DEV_NET_ETHERPKT_HH__ 88