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# Copyright 2007 Roy Marples
# All rights reserved
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
apipa_depend() {
program /sbin/arping
}
_random() {
local r=${RANDOM}
if [ -n "${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}="\"${addr}/16 broadcast 169.254.255.255\""
config_index=$((${config_index} - 1))
veend 0
eoutdent
return 0
fi
i=$((${i} + 1))
done
eerror "No free address found!"
eoutdent
return 1
}
# vim: set ts=4 :
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