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Annotation of embedaddon/arping/extra/arping-scan-net.sh, revision 1.1

1.1     ! misho       1: #!/bin/sh
        !             2: # arping-scan-net.sh
        !             3: #
        !             4: #  Copyright (C) 2002 Thomas Habets <thomas@habets.pp.se>
        !             5: #
        !             6: #  This library is free software; you can redistribute it and/or
        !             7: #  modify it under the terms of the GNU General Public
        !             8: #  License as published by the Free Software Foundation; either
        !             9: #  version 2 of the License, or (at your option) any later version.
        !            10: #
        !            11: #  This library is distributed in the hope that it will be useful,
        !            12: #  but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13: #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        !            14: #  General Public License for more details.
        !            15: #
        !            16: #  You should have received a copy of the GNU General Public License along
        !            17: #  with this program; if not, write to the Free Software Foundation, Inc.,
        !            18: #  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
        !            19: #
        !            20: 
        !            21: trap "exit 0" INT
        !            22: 
        !            23: if [ "$1" = "" ]; then
        !            24:        echo
        !            25:        echo "Usage: $0 <mac address>"
        !            26:        echo ""
        !            27:        echo "   Sorry, it's not more configurable than that, edit the source"
        !            28:        echo
        !            29:        exit 1
        !            30: fi
        !            31: TARGET_MAC="$1"
        !            32: 
        !            33: # seq doesnt exist on some retarded boxen, comment out if your box is too
        !            34: # stupid to have bc and/or tr
        !            35: seq() { echo "for (i=$1; i<=$2; i++) i;" | bc | tr "\012" " "; }
        !            36: 
        !            37: #
        !            38: # first number after 'seq' is range start, second is range end
        !            39: #
        !            40: # default is [192-192].[168-168].[0-0].[0-255]
        !            41: #
        !            42: #
        !            43: # I may put this functionality into ARPing one day if people seem to like it.
        !            44: #
        !            45: for a in $(seq 192 192); do
        !            46:     for b in $(seq 168 168); do
        !            47:        for c in $(seq 0 0); do
        !            48:            for d in $(seq 0 255); do
        !            49:                sh -c "arping -A -q -c 1 -T $a.$b.$c.$d $TARGET_MAC
        !            50:                if [ \$? = 0 ]; then
        !            51:                    echo Got answer with address: $a.$b.$c.$d
        !            52:                fi" &
        !            53:            done
        !            54:            wait
        !            55:        done
        !            56:     done
        !            57: done
        !            58: #exit 1