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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 *    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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