#!/bin/sh
#
# This script is to find all current cluster id's in use on a LAN segment.
# This script must be run as root.
# 
# Todd Mortensen <tmortens@veritas.com>
# May 6 2002

device="hme0"       # Device to use (hme?,le?,qe?,qfe?,etc...)
count="50"      # Number of packets to capture.
sap="0xcafe"        # Change if needed.
tmpf="/tmp/fndclid" # Location of tmpfile.
ibase="16"           # octal
progname=$0

usage() {
   echo "Usage: $progname [-d interface ] [-s SAP] [-c count] [ -T filename] "
   echo "-d   Network Interface to use."
   echo "-s   Set LLT SAP"
   echo "-c   Number of packets to sample."
   echo "-T   Set Temp file prefix to use."
   echo "-h   Usage help"
   exit 0
}

while getopts "d:s:T:c:h" opt; do
    case $opt in
    d )  device=$OPTARG ;;
    s )  sap=$OPTARG ;;
    T )  tmpf=$OPTARG ;;
    c )  count=$OPTARG ;;
    h )  usage ;;
    \?)  usage ;;
    esac
done

# Main Script section

if [ `id | cut -c5` -ne 0 ]; then
    echo "You must have super user (root) privileges." >&2
    exit 1
fi

if [ -d $tmpf ]; then
    echo "Sorry, -T must be followed by a temporary filename not a directory."
    exit 0
fi

rm -f $tmpf.tmp $tmpf.out $tmpf.cap
echo -n "Counting $count Heartbeats "
snoop -o $tmpf.cap -c $count -d $device ethertype $sap
snoop -i $tmpf.cap -x 16,6  | grep -v CAFE | sort -n | uniq | awk ' { print substr($2,1,2) ":" substr($4,3,2) } ' > $tmpf.tmp
for i in `cat $tmpf.tmp|grep -v "^:"` ; do
    clid=`echo "$i" | awk -F: ' { print $1 } '`
    ndid=`echo "$i" | awk -F: ' { print $2 } '`
    uppercaseclid=`echo "$clid" | sed -e 's:^0[bBxX]::' | tr '[a-f]' '[A-F]'`
    decimalclid=`echo "ibase=$ibase; $uppercaseclid" | bc`
    uppercasendid=`echo "$ndid" | sed -e 's:^0[bBxX]::' | tr '[a-f]' '[A-F]'`
    decimalndid=`echo "ibase=$ibase; $uppercasendid" | bc`
    echo "$decimalclid $decimalndid" >> $tmpf.out
done
echo " "
echo "Cluster and Node ID's detected."
echo "-------------------------------"                                                                           
cat $tmpf.out | sort -n | uniq                                                                                    
rm -f $tmpf.tmp $tmpf.out $tmpf.cap