#! /bin/sh

if test $# -lt 6
then
	echo "Invalid number of arguments"
	echo "USAGE : HoD <A.B> <XMin> <XMax> <YMin> <YMax>  <Domain>" 
	exit
fi

if test -f AllHosts
then
	rm AllHosts
fi

if test -f AliveHosts
then 
	rm AliveHosts
fi

if test -f TelnetHosts
then
	rm TelnetHosts
fi

touch teljunk

i=$2
j=$4

while test $i -le $3
do
	j=$4
	while test $j -le $5
	do
		var1=`nslookup $1.$i.$j | grep 'Name:' | egrep -e $6 `
		if test $? -eq 0
		then
			echo IP: $1.$i.$j '\t' $var1 >> AllHosts

			png=`ping $1.$i.$j | grep alive`
			
			if test $? -eq 0
			then
				echo IP: $1.$i.$j '\t' $var1 >> AliveHosts

				telnt=`telnet $1.$i.$j < teljunk | grep 'Connected`
			
				if test $? -eq 0
				then
					echo IP: $1.$i.$j '\t' $var1 >> TelnetHosts
				fi
			fi
		fi
		
		j=`expr $j + 1`
	done

	i=`expr $i + 1`
done

if test -f teljunk
then
	rm teljunk
fi
rm  teljunk