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# Copyright (c) 2007-2008 Roy Marples <roy@marples.name>
# Released under the 2-clause BSD license.
apipa_depend()
{
program /sbin/arping
}
_random()
{
local r=${RANDOM} # checkbashisms: false positive, we handle it AFTERWARDS
if [ -n "${r}" ]; then
echo "${r}"
else
uuidgen | sed -n -e 's/[^[:digit:]]//g' -e 's/\(^.\{1,7\}\).*/\1/p'
fi
}
apipa_start()
{
local iface="$1" i1= i2= addr= i=0
_exists true || return 1
einfo "Searching for free addresses in 169.254.0.0/16"
eindent
while [ ${i} -lt 64516 ]; do
: $(( i1 = (_random % 255) + 1 ))
: $(( i2 = (_random % 255) + 1 ))
addr="169.254.${i1}.${i2}"
vebegin "${addr}/16"
if ! arping_address "${addr}"; then
eval config_${config_index}="\"${addr}/16 broadcast 169.254.255.255\""
: $(( config_index -= 1 ))
veend 0
eoutdent
return 0
fi
: $(( i += 1 ))
done
eerror "No free address found!"
eoutdent
return 1
}
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