From 91a8cee50c9cce580534b8cc6ca31265029ef6d2 Mon Sep 17 00:00:00 2001
From: Nick <nick@somerandomnick.ano>
Date: Wed, 12 May 2010 21:29:59 +0000
Subject: scripts for dom&ip, dn42 resdb, and doc (www.anonet2.org)

---
 scripts/cidr2ip | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100755 scripts/cidr2ip

(limited to 'scripts/cidr2ip')

diff --git a/scripts/cidr2ip b/scripts/cidr2ip
new file mode 100755
index 0000000..474173e
--- /dev/null
+++ b/scripts/cidr2ip
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+if [ x"$1" = x ]; then
+ echo "Usage: $0 <cidr>" >&2; exit 255
+fi
+
+ip="$(echo "$1" | cut -d/ -f1)"
+len="$(echo "$1" | cut -d/ -f2)"
+if [ x"$((len%8))" != x0 ]; then
+ echo "Prefix length must be a multiple of 8" >&2; exit 255
+fi
+octets="$((len/8))"
+for x in `seq 1 $octets` ; do
+ echo $ip | cut -d. -f$x
+done | tr '\n' . | head -c -1 ; echo
-- 
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