ethertap.hh revision 1762
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 45/* 46 * Interface to connect a simulated ethernet device to the real world 47 */ 48class EtherTap : public EtherInt 49{ 50 protected: 51 friend class TapEvent; 52 TapEvent *event; 53 54 protected: 55 friend class TapListener; 56 TapListener *listener; 57 int socket; 58 char *buffer; 59 int buflen; 60 int32_t buffer_offset; 61 int32_t data_len; 62 63 EtherDump *dump; 64 65 void attach(int fd); 66 void detach(); 67 68 protected: 69 std::string device; 70 std::queue<PacketPtr> packetBuffer; 71 72 void process(int revent); 73 void enqueue(PacketData *packet); 74 void retransmit(); 75 76 /* 77 */ 78 class TxEvent : public Event 79 { 80 protected: 81 EtherTap *tap; 82 83 public: 84 TxEvent(EtherTap *_tap) 85 : Event(&mainEventQueue), tap(_tap) {} 86 void process() { tap->retransmit(); } 87 virtual const char *description() { return "retransmit event"; } 88 }; 89 90 friend class TxEvent; 91 TxEvent txEvent; 92 93 public: 94 EtherTap(const std::string &name, EtherDump *dump, int port, int bufsz); 95 virtual ~EtherTap(); 96 97 virtual bool recvPacket(PacketPtr packet); 98 virtual void sendDone(); 99 100 virtual void serialize(std::ostream &os); 101 virtual void unserialize(Checkpoint *cp, const std::string §ion); 102}; 103 104#endif // __ETHERTAP_HH__ 105