#!/bin/bash

ip=""; host=""; mac=""; create=false; quiet=false;

function scan_usage {
cat << EOT
usage: scan [-c] [-h] [-q] [search-reg]

Options
 -c      create output, usable as create arguments
 -h      help
 -q      quiet, minimal output

the optional regular expression is passed to egrep
EOT
exit;
}

while getopts hcq o 2>/dev/null; do
        case "$o" in
                h) scan_usage;;
                c) create=true;;
                q) quiet=true;;
        esac
        shift;
done

oldifs="$IFS";
IFS="
";

if [[ ! -z $1 && $1 == "help" ]]; then
        scan_usage;
fi

if [[ $create == false && $quiet == false ]]; then
        echo -n "scanning $_NETWORK";for l in `nmap -sP $_NETWORK | grep ^Host | awk '{print $3"|"$2} ' |\
        sed -e 's/[\(\)]//g'`; do
        
        # use search pattern if there is one
        if [[ ! -z $1 ]]; then
                l=`echo $l | egrep $1`;
                if [[ -z $l ]]; then
                        continue;
                fi
        fi

        ip=`echo "$l" | cut -d'|' -f1`;
        host=`echo "$l" | cut -d'|' -f2`; # | sed -e 's/'"asdfasdfasdf"'//';
        host=`echo "$host" | sed -e 's/\.'$_DOMAIN'//'`;
        
        if [[ "`hostname`" != "$host" ]]; then
                mac=`arp $ip |grep ether| sed -e 's/.*\([0-9A-F:]\{17\}\).*/\1/'`;
        else
                mac=`ifconfig | grep $_INTERFACE | sed -e 's/.*\([0-9A-F:]\{17\}\).*/\1/'`;
        fi
        
        if [[ $create == false ]]; then
                echo -e "$ip\t$mac\t$host";
        else
                echo -e "$host $ip $mac";
        fi
done
IFS="$oldifs";

exit 0;

        if [[ ! -z $1 && $1 != "help" ]]; then
                echo -n ", for $1";
        fi
        echo " ... please wait.";
fi