varp.cc

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/* -*-  Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
 * Copyright (c) 1996 Regents of the University of California.
 * All rights reserved.
 *
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *  This product includes software developed by the Computer Systems
 *  Engineering Group at Lawrence Berkeley Laboratory and the Daedalus
 *  research group at UC Berkeley.
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#include "varp.h"
#include "mac.h"
#include "packet.h"


static class VARPTableClass : public TclClass {
public:
    VARPTableClass() : TclClass("VARPTable") {}
    TclObject* create(int, const char*const*) {
        return (new VARPTable);
    }
} class_VARPTable;


VARPTable::VARPTable(void) : TclObject(), maddr_(0), size_(0)
{}


VARPTable::~VARPTable(void) 
{
    delete [] maddr_;
}

void VARPTable::sizeinit(int n)
{
    int *temp = maddr_;
    int osize = size_;
    int i; 
    
    if (size_ == 0)
        size_ = 10;
    while(!(n < size_))
            size_ = 2*size_;
    maddr_ = new int[size_];
    for (i=0;i<osize;i++)
        maddr_[i] = temp[i];
    for (i=osize;i<size_;i++)
        maddr_[i] = -1;
    delete [] temp;
}

int VARPTable::command(int argc, const char*const* argv) {
    if (argc == 4) {
        if (strcmp(argv[1], "mac-addr") == 0) {
            int n = atoi(argv[2]);
            if(!(n < size_))
                sizeinit(n);
            
            maddr_[n] = atoi(argv[3]);
            return (TCL_OK);
        }
    }
    return TclObject::command(argc, argv);
}

int VARPTable::arpresolve(int IPaddr, Packet* p) {
    if (IPaddr > size_)
        return 1;
    int ma = maddr_[IPaddr];
    if (ma >= 0) {
        HDR_MAC(p)->macDA_ = ma;
        return 0;
    }
    return 1;
}

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