49 lines
916 B
Bash
49 lines
916 B
Bash
# Copyright (c) 2007-2008 Roy Marples <roy@marples.name>
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# Released under the 2-clause BSD license.
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apipa_depend()
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{
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program /sbin/arping
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}
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_random()
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{
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local r=${RANDOM} # checkbashisms: false positive, we handle it AFTERWARDS
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if [ -n "${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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{
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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 -= 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 += 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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