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/*
* Copyright (c) 2003-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Nathan Binkert
*/
/* @file
* Interface to connect a simulated ethernet device to the real world
*/
#ifndef __ETHERTAP_HH__
#define __ETHERTAP_HH__
#include <queue>
#include <string>
#include "base/pollevent.hh"
#include "dev/etherint.hh"
#include "dev/etherobject.hh"
#include "dev/etherpkt.hh"
#include "params/EtherTap.hh"
#include "sim/eventq.hh"
#include "sim/sim_object.hh"
class TapEvent;
class TapListener;
class EtherTapInt;
/*
* Interface to connect a simulated ethernet device to the real world
*/
class EtherTap : public EtherObject
{
protected:
friend class TapEvent;
TapEvent *event;
protected:
friend class TapListener;
TapListener *listener;
int socket;
char *buffer;
int buflen;
uint32_t buffer_offset;
uint32_t data_len;
EtherDump *dump;
void attach(int fd);
void detach();
protected:
std::string device;
std::queue<EthPacketPtr> packetBuffer;
EtherTapInt *interface;
void process(int revent);
void enqueue(EthPacketData *packet);
void retransmit();
/*
*/
class TxEvent : public Event
{
protected:
EtherTap *tap;
public:
TxEvent(EtherTap *_tap) : tap(_tap) {}
void process() { tap->retransmit(); }
virtual const char *description() const
{ return "EtherTap retransmit"; }
};
friend class TxEvent;
TxEvent txEvent;
public:
typedef EtherTapParams Params;
EtherTap(const Params *p);
virtual ~EtherTap();
const Params *
params() const
{
return dynamic_cast<const Params *>(_params);
}
virtual EtherInt *getEthPort(const std::string &if_name, int idx);
virtual bool recvPacket(EthPacketPtr packet);
virtual void sendDone();
void serialize(CheckpointOut &cp) const M5_ATTR_OVERRIDE;
void unserialize(CheckpointIn &cp) M5_ATTR_OVERRIDE;
};
class EtherTapInt : public EtherInt
{
private:
EtherTap *tap;
public:
EtherTapInt(const std::string &name, EtherTap *t)
: EtherInt(name), tap(t)
{ }
virtual bool recvPacket(EthPacketPtr pkt) { return tap->recvPacket(pkt); }
virtual void sendDone() { tap->sendDone(); }
};
#endif // __ETHERTAP_HH__
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