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Diffstat (limited to 'net/apipa.sh')
| -rw-r--r-- | net/apipa.sh | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/net/apipa.sh b/net/apipa.sh new file mode 100644 index 0000000..39da392 --- /dev/null +++ b/net/apipa.sh @@ -0,0 +1,48 @@ +# Copyright 2007-2008 Roy Marples <roy@marples.name> +# All rights reserved. Released under the 2-clause BSD license. + +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 +} |