69 lines
2.1 KiB
Bash
69 lines
2.1 KiB
Bash
# Copyright 2007 Roy Marples
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# All rights reserved
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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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.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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apipa_depend() {
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program /sbin/arping
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}
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_random() {
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local r=${RANDOM}
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if [ -n "${r}" ]; then
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echo "${r}"
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else
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uuidgen | sed -n -e 's/[^[:digit:]]//g' -e 's/\(^.\{1,7\}\).*/\1/p'
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fi
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}
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apipa_start() {
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local iface="$1" i1= i2= addr= i=0
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_exists true || return 1
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einfo "Searching for free addresses in 169.254.0.0/16"
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eindent
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while [ ${i} -lt 64516 ]; do
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i1=$((($(_random) % 255) + 1))
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i2=$((($(_random) % 255) + 1))
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addr="169.254.${i1}.${i2}"
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vebegin "${addr}/16"
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if ! arping_address "${addr}"; then
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eval config_${config_index}="\"${addr}/16 broadcast 169.254.255.255\""
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config_index=$((${config_index} - 1))
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veend 0
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eoutdent
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return 0
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fi
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i=$((${i} + 1))
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done
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eerror "No free address found!"
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eoutdent
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return 1
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}
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# vim: set ts=4 :
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