2016-02-06 19:33:34 +01:00
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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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2016-06-08 16:12:41 +02:00
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#include <map>
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#include <set>
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2016-02-06 19:33:34 +01:00
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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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2016-02-15 09:40:32 +01:00
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EtherInt *getEthPort(const std::string &if_name, int idx) override;
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2016-02-06 19:33:34 +01:00
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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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2016-06-08 16:12:41 +02:00
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class Interface : public EtherInt, public Serializable
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2016-02-06 19:33:34 +01:00
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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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2016-06-08 16:12:41 +02:00
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double rate, unsigned id);
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2016-02-06 19:33:34 +01:00
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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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2016-06-08 16:12:41 +02:00
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void enqueue(EthPacketPtr packet, unsigned senderId);
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2016-02-06 19:33:34 +01:00
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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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2016-06-08 16:12:41 +02:00
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void serialize(CheckpointOut &cp) const;
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void unserialize(CheckpointIn &cp);
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2016-02-06 19:33:34 +01:00
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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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2016-06-08 16:12:41 +02:00
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const unsigned interfaceId;
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2016-02-06 19:33:34 +01:00
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EtherSwitch *parent;
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2016-06-08 16:12:41 +02:00
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protected:
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struct PortFifoEntry : public Serializable
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{
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PortFifoEntry(EthPacketPtr pkt, Tick recv_tick, unsigned id)
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: packet(pkt), recvTick(recv_tick), srcId(id) {}
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EthPacketPtr packet;
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Tick recvTick;
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// id of the port that the packet has been received from
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unsigned srcId;
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~PortFifoEntry()
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{
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packet = nullptr;
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recvTick = 0;
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srcId = 0;
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}
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void serialize(CheckpointOut &cp) const;
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void unserialize(CheckpointIn &cp);
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};
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class PortFifo : public Serializable
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{
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protected:
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struct EntryOrder {
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bool operator() (const PortFifoEntry& lhs,
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const PortFifoEntry& rhs) const
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{
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if (lhs.recvTick == rhs.recvTick)
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return lhs.srcId < rhs.srcId;
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else
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return lhs.recvTick < rhs.recvTick;
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}
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};
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std::set<PortFifoEntry, EntryOrder> fifo;
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const std::string objName;
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const unsigned _maxsize;
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unsigned _size;
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public:
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PortFifo(const std::string &name, int max)
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:objName(name), _maxsize(max), _size(0) {}
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~PortFifo() {}
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const std::string name() { return objName; }
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// Returns the available capacity of the fifo.
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// It can return a negative value because in "push" function
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// we first push the received packet into the fifo and then
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// check if we exceed the available capacity (if avail() < 0)
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// and remove packets from the end of fifo
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int avail() const { return _maxsize - _size; }
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EthPacketPtr front() { return fifo.begin()->packet; }
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bool empty() const { return _size == 0; }
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unsigned size() const { return _size; }
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/**
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* Push a packet into the fifo
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* and sort the packets with same recv tick by port id
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*/
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bool push(EthPacketPtr ptr, unsigned senderId);
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void pop();
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void clear();
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/**
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* Serialization stuff
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*/
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void serialize(CheckpointOut &cp) const;
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void unserialize(CheckpointIn &cp);
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};
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2016-02-06 19:33:34 +01:00
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/**
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* output fifo at each interface
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*/
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2016-06-08 16:12:41 +02:00
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PortFifo outputFifo;
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2016-02-06 19:33:34 +01:00
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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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