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Diffstat (limited to 'src/dev/net/ethertap.hh')
-rw-r--r-- | src/dev/net/ethertap.hh | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/src/dev/net/ethertap.hh b/src/dev/net/ethertap.hh new file mode 100644 index 000000000..b27b80f84 --- /dev/null +++ b/src/dev/net/ethertap.hh @@ -0,0 +1,136 @@ +/* + * 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 __DEV_NET_ETHERTAP_HH__ +#define __DEV_NET_ETHERTAP_HH__ + +#include <queue> +#include <string> + +#include "base/pollevent.hh" +#include "dev/net/etherint.hh" +#include "dev/net/etherobject.hh" +#include "dev/net/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); + } + + EtherInt *getEthPort(const std::string &if_name, int idx) override; + + virtual bool recvPacket(EthPacketPtr packet); + virtual void sendDone(); + + void serialize(CheckpointOut &cp) const override; + void unserialize(CheckpointIn &cp) 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 // __DEV_NET_ETHERTAP_HH__ |