ethertap.hh revision 2566
1/* 2 * Copyright (c) 2003-2005 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 * Interface to connect a simulated ethernet device to the real world 31 */ 32 33#ifndef __ETHERTAP_HH__ 34#define __ETHERTAP_HH__ 35 36#include <queue> 37#include <string> 38 39#include "dev/etherint.hh" 40#include "dev/etherpkt.hh" 41#include "sim/eventq.hh" 42#include "base/pollevent.hh" 43#include "sim/sim_object.hh" 44 45class TapEvent; 46class TapListener; 47 48/* 49 * Interface to connect a simulated ethernet device to the real world 50 */ 51class EtherTap : public EtherInt 52{ 53 protected: 54 friend class TapEvent; 55 TapEvent *event; 56 57 protected: 58 friend class TapListener; 59 TapListener *listener; 60 int socket; 61 char *buffer; 62 int buflen; 63 int32_t buffer_offset; 64 int32_t data_len; 65 66 EtherDump *dump; 67 68 void attach(int fd); 69 void detach(); 70 71 protected: 72 std::string device; 73 std::queue<EthPacketPtr> packetBuffer; 74 75 void process(int revent); 76 void enqueue(EthPacketData *packet); 77 void retransmit(); 78 79 /* 80 */ 81 class TxEvent : public Event 82 { 83 protected: 84 EtherTap *tap; 85 86 public: 87 TxEvent(EtherTap *_tap) 88 : Event(&mainEventQueue), tap(_tap) {} 89 void process() { tap->retransmit(); } 90 virtual const char *description() { return "retransmit event"; } 91 }; 92 93 friend class TxEvent; 94 TxEvent txEvent; 95 96 public: 97 EtherTap(const std::string &name, EtherDump *dump, int port, int bufsz); 98 virtual ~EtherTap(); 99 100 virtual bool recvPacket(EthPacketPtr packet); 101 virtual void sendDone(); 102 103 virtual void serialize(std::ostream &os); 104 virtual void unserialize(Checkpoint *cp, const std::string §ion); 105}; 106 107#endif // __ETHERTAP_HH__ 108