# Copyright (c) 2007-2008 Roy Marples # 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 }