classifier-mac.cc

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/* -*-  Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
 * Copyright (c) 1996-1997 Regents of the University of California.
 * All rights reserved.
 * 
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 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
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 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
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 *    must display the following acknowledgement:
 *      This product includes software developed by the MASH Research
 *      Group at the University of California Berkeley.
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#ifndef lint
static const char rcsid[] =
    "@(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/classifier/classifier-mac.cc,v 1.15 1999/01/04 19:58:56 haldar Exp $ (UCB)";
#endif

#include "packet.h"
#include "mac.h"
#include "classifier.h"

class MacClassifier : public Classifier {
public:
        MacClassifier() : bcast_(0) {
                bind("bcast_", &bcast_);
        }
        void recv(Packet*, Handler*);
        int bcast_;
};

static class MacClassifierClass : public TclClass {
public:
        MacClassifierClass() : TclClass("Classifier/Mac") {}
        TclObject* create(int, const char*const*) {
                return (new MacClassifier());
        }
} class_mac_classifier;


void MacClassifier::recv(Packet* p, Handler*)
{
        Mac* mac;
        hdr_mac* mh = HDR_MAC(p);

        if (bcast_ || mh->macDA() == BCAST_ADDR || (mac = (Mac *)find(p)) == 0) {
                // Replicate packets to all slots (broadcast)
                int macSA = mh->macSA();
                for (int i = 0; i < maxslot_; ++i) {
                        if ((mac = (Mac *)slot_[i]) && mac->addr() != macSA) 
                                mac->recv(p->copy(), 0);
                }
                if (maxslot_ >= 0) {
                        mac= (Mac *)slot_[maxslot_];
                        if (mac->addr() != macSA) { 
                                mac->recv(p, 0);
                                return;
                        }
                }
                Packet::free(p);
                return;
        }
        mac->recv(p, 0);
}

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