124 lines
4 KiB
C++
124 lines
4 KiB
C++
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/*
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* Copyright (c) 2014 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Anthony Gutierrez
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* Mohammad Alian
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*/
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/* @file
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* Device model for an ethernet switch
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*/
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#ifndef __DEV_ETHERSWITCH_HH__
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#define __DEV_ETHERSWITCH_HH__
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#include <unordered_map>
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#include "base/inet.hh"
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#include "dev/net/etherint.hh"
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#include "dev/net/etherlink.hh"
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#include "dev/net/etherobject.hh"
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#include "dev/net/etherpkt.hh"
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#include "dev/net/pktfifo.hh"
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#include "params/EtherSwitch.hh"
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#include "sim/eventq.hh"
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class EtherSwitch : public EtherObject
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{
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public:
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typedef EtherSwitchParams Params;
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EtherSwitch(const Params *p);
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~EtherSwitch();
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const Params * params() const
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{
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return dynamic_cast<const Params*>(_params);
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}
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EtherInt *getEthPort(const std::string &if_name, int idx);
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protected:
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/**
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* Model for an Ethernet switch port
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*/
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class Interface : public EtherInt
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{
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public:
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Interface(const std::string &name, EtherSwitch *_etherSwitch,
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uint64_t outputBufferSize, Tick delay, Tick delay_var,
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double rate);
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/**
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* When a packet is received from a device, route it
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* through an (several) output queue(s)
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*/
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bool recvPacket(EthPacketPtr packet);
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/**
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* enqueue packet to the outputFifo
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*/
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void enqueue(EthPacketPtr packet);
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void sendDone() {}
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Tick switchingDelay();
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Interface* lookupDestPort(Net::EthAddr destAddr);
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void learnSenderAddr(Net::EthAddr srcMacAddr, Interface *sender);
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void serialize(const std::string &base, CheckpointOut &cp) const;
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void unserialize(const std::string &base, CheckpointIn &cp);
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private:
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const double ticksPerByte;
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const Tick switchDelay;
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const Tick delayVar;
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EtherSwitch *parent;
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/**
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* output fifo at each interface
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*/
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PacketFifo outputFifo;
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void transmit();
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EventWrapper<Interface, &Interface::transmit> txEvent;
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};
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struct SwitchTableEntry {
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Interface *interface;
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Tick lastUseTime;
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};
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private:
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// time to live for MAC address mappings
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const double ttl;
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// all interfaces of the switch
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std::vector<Interface*> interfaces;
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// table that maps MAC address to interfaces
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std::map<uint64_t, SwitchTableEntry> forwardingTable;
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void serialize(CheckpointOut &cp) const override;
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void unserialize(CheckpointIn &cp) override;
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};
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#endif // __DEV_ETHERSWITCH_HH__
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