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Diffstat (limited to 'src/dev/net/etherswitch.hh')
-rw-r--r-- | src/dev/net/etherswitch.hh | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/src/dev/net/etherswitch.hh b/src/dev/net/etherswitch.hh new file mode 100644 index 000000000..69a3f40fd --- /dev/null +++ b/src/dev/net/etherswitch.hh @@ -0,0 +1,123 @@ +/* + * Copyright (c) 2014 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: Anthony Gutierrez + * Mohammad Alian + */ + +/* @file + * Device model for an ethernet switch + */ + +#ifndef __DEV_ETHERSWITCH_HH__ +#define __DEV_ETHERSWITCH_HH__ + +#include <unordered_map> + +#include "base/inet.hh" +#include "dev/net/etherint.hh" +#include "dev/net/etherlink.hh" +#include "dev/net/etherobject.hh" +#include "dev/net/etherpkt.hh" +#include "dev/net/pktfifo.hh" +#include "params/EtherSwitch.hh" +#include "sim/eventq.hh" + +class EtherSwitch : public EtherObject +{ + public: + typedef EtherSwitchParams Params; + + EtherSwitch(const Params *p); + ~EtherSwitch(); + + const Params * params() const + { + return dynamic_cast<const Params*>(_params); + } + + EtherInt *getEthPort(const std::string &if_name, int idx); + + protected: + /** + * Model for an Ethernet switch port + */ + class Interface : public EtherInt + { + public: + Interface(const std::string &name, EtherSwitch *_etherSwitch, + uint64_t outputBufferSize, Tick delay, Tick delay_var, + double rate); + /** + * When a packet is received from a device, route it + * through an (several) output queue(s) + */ + bool recvPacket(EthPacketPtr packet); + /** + * enqueue packet to the outputFifo + */ + void enqueue(EthPacketPtr packet); + void sendDone() {} + Tick switchingDelay(); + + Interface* lookupDestPort(Net::EthAddr destAddr); + void learnSenderAddr(Net::EthAddr srcMacAddr, Interface *sender); + + void serialize(const std::string &base, CheckpointOut &cp) const; + void unserialize(const std::string &base, CheckpointIn &cp); + + private: + const double ticksPerByte; + const Tick switchDelay; + const Tick delayVar; + EtherSwitch *parent; + /** + * output fifo at each interface + */ + PacketFifo outputFifo; + void transmit(); + EventWrapper<Interface, &Interface::transmit> txEvent; + }; + + struct SwitchTableEntry { + Interface *interface; + Tick lastUseTime; + }; + + private: + // time to live for MAC address mappings + const double ttl; + // all interfaces of the switch + std::vector<Interface*> interfaces; + // table that maps MAC address to interfaces + std::map<uint64_t, SwitchTableEntry> forwardingTable; + + void serialize(CheckpointOut &cp) const override; + void unserialize(CheckpointIn &cp) override; +}; + +#endif // __DEV_ETHERSWITCH_HH__ |