ethertap.hh revision 56
18012Ssaidi@eecs.umich.edu/* 28029Snate@binkert.org * Copyright (c) 2003 The Regents of The University of Michigan 38029Snate@binkert.org * All rights reserved. 48013Sbinkertn@umich.edu * 58029Snate@binkert.org * Redistribution and use in source and binary forms, with or without 68029Snate@binkert.org * modification, are permitted provided that the following conditions are 78029Snate@binkert.org * met: redistributions of source code must retain the above copyright 88029Snate@binkert.org * notice, this list of conditions and the following disclaimer; 98029Snate@binkert.org * redistributions in binary form must reproduce the above copyright 108029Snate@binkert.org * notice, this list of conditions and the following disclaimer in the 118029Snate@binkert.org * documentation and/or other materials provided with the distribution; 128029Snate@binkert.org * neither the name of the copyright holders nor the names of its 138029Snate@binkert.org * contributors may be used to endorse or promote products derived from 148029Snate@binkert.org * this software without specific prior written permission. 158013Sbinkertn@umich.edu * 168029Snate@binkert.org * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 178029Snate@binkert.org * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 188029Snate@binkert.org * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 198029Snate@binkert.org * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 208029Snate@binkert.org * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 218029Snate@binkert.org * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 228029Snate@binkert.org * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 238029Snate@binkert.org * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 248029Snate@binkert.org * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 258029Snate@binkert.org * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 268029Snate@binkert.org * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 278013Sbinkertn@umich.edu */ 288013Sbinkertn@umich.edu 298012Ssaidi@eecs.umich.edu/* @file 308019Sbenash@umich.edu * Interface to connect a simulated ethernet device to the real world 318019Sbenash@umich.edu */ 328019Sbenash@umich.edu 338019Sbenash@umich.edu#ifndef __ETHERTAP_HH__ 348019Sbenash@umich.edu#define __ETHERTAP_HH__ 358019Sbenash@umich.edu 368019Sbenash@umich.edu#include <queue> 378019Sbenash@umich.edu#include <string> 388019Sbenash@umich.edu 398019Sbenash@umich.edu#include "dev/etherint.hh" 408019Sbenash@umich.edu#include "dev/etherpkt.hh" 418019Sbenash@umich.edu#include "sim/eventq.hh" 428019Sbenash@umich.edu#include "base/pollevent.hh" 438019Sbenash@umich.edu#include "sim/sim_object.hh" 448019Sbenash@umich.edu 458019Sbenash@umich.edu/* 468019Sbenash@umich.edu * Interface to connect a simulated ethernet device to the real world 478019Sbenash@umich.edu */ 488019Sbenash@umich.educlass EtherTap : public EtherInt 498019Sbenash@umich.edu{ 508019Sbenash@umich.edu protected: 518019Sbenash@umich.edu friend class TapEvent; 528019Sbenash@umich.edu TapEvent *event; 538019Sbenash@umich.edu 548019Sbenash@umich.edu protected: 558019Sbenash@umich.edu friend class TapListener; 568019Sbenash@umich.edu TapListener *listener; 577977Shsul@eecs.umich.edu int socket; 587977Shsul@eecs.umich.edu char *buffer; 597977Shsul@eecs.umich.edu int buflen; 607977Shsul@eecs.umich.edu int32_t buffer_offset; 617977Shsul@eecs.umich.edu int32_t data_len; 627977Shsul@eecs.umich.edu 637977Shsul@eecs.umich.edu EtherDump *dump; 647977Shsul@eecs.umich.edu 657977Shsul@eecs.umich.edu void attach(int fd); 667977Shsul@eecs.umich.edu void detach(); 677977Shsul@eecs.umich.edu 687977Shsul@eecs.umich.edu protected: 697977Shsul@eecs.umich.edu std::string device; 707977Shsul@eecs.umich.edu std::queue<PacketPtr> packetBuffer; 717977Shsul@eecs.umich.edu 727977Shsul@eecs.umich.edu void process(int revent); 737977Shsul@eecs.umich.edu void enqueue(EtherPacket *packet); 747977Shsul@eecs.umich.edu void retransmit(); 757977Shsul@eecs.umich.edu 767977Shsul@eecs.umich.edu /* 777977Shsul@eecs.umich.edu */ 787977Shsul@eecs.umich.edu class TxEvent : public Event 797977Shsul@eecs.umich.edu { 807977Shsul@eecs.umich.edu protected: 817977Shsul@eecs.umich.edu EtherTap *tap; 827977Shsul@eecs.umich.edu 837977Shsul@eecs.umich.edu public: 847977Shsul@eecs.umich.edu TxEvent(EtherTap *_tap) 857977Shsul@eecs.umich.edu : Event(&mainEventQueue), tap(_tap) {} 867977Shsul@eecs.umich.edu void process() { tap->retransmit(); } 877977Shsul@eecs.umich.edu virtual const char *description() { return "retransmit event"; } 887977Shsul@eecs.umich.edu }; 897977Shsul@eecs.umich.edu 907977Shsul@eecs.umich.edu friend class TxEvent; 917977Shsul@eecs.umich.edu TxEvent txEvent; 927977Shsul@eecs.umich.edu 937977Shsul@eecs.umich.edu public: 947977Shsul@eecs.umich.edu EtherTap(const std::string &name, EtherDump *dump, int port, int bufsz); 957977Shsul@eecs.umich.edu virtual ~EtherTap(); 967977Shsul@eecs.umich.edu 977977Shsul@eecs.umich.edu virtual bool recvPacket(PacketPtr packet); 987977Shsul@eecs.umich.edu virtual void sendDone(); 998013Sbinkertn@umich.edu}; 1007977Shsul@eecs.umich.edu 1017977Shsul@eecs.umich.edu#endif // __ETHERTAP_HH__ 1027977Shsul@eecs.umich.edu