Mercurial > hg > anonet-resdb
comparison scripts/cidr2ip @ 19:31e3b4edf502 draft
scripts for dom&ip, dn42 resdb, and doc (www.anonet2.org)
| author | Nick <nick@somerandomnick.ano> |
|---|---|
| date | Wed, 12 May 2010 21:29:59 +0000 |
| parents | |
| children |
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| 18:89b5d9e83572 | 19:31e3b4edf502 |
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| 1 #!/bin/sh | |
| 2 | |
| 3 if [ x"$1" = x ]; then | |
| 4 echo "Usage: $0 <cidr>" >&2; exit 255 | |
| 5 fi | |
| 6 | |
| 7 ip="$(echo "$1" | cut -d/ -f1)" | |
| 8 len="$(echo "$1" | cut -d/ -f2)" | |
| 9 if [ x"$((len%8))" != x0 ]; then | |
| 10 echo "Prefix length must be a multiple of 8" >&2; exit 255 | |
| 11 fi | |
| 12 octets="$((len/8))" | |
| 13 for x in `seq 1 $octets` ; do | |
| 14 echo $ip | cut -d. -f$x | |
| 15 done | tr '\n' . | head -c -1 ; echo |