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authorFelix Fietkau <nbd@openwrt.org>2006-10-13 22:51:49 +0200
committerFelix Fietkau <nbd@openwrt.org>2016-03-20 17:29:15 +0100
commit60c1f0f64d23003a19a07d6b9638542130f6641d (patch)
tree8fb2787f4c49baded97cd55e0c371fe1cffce2b6 /package/base-files/default/bin/ipcalc
parentd58a09110ccfa95f06c983fe796806f2e035c9d2 (diff)
parentb3ce218b51746d3a576221ea542facf3a1703ab2 (diff)
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finally move buildroot-ng to trunk
Diffstat (limited to 'package/base-files/default/bin/ipcalc')
-rwxr-xr-xpackage/base-files/default/bin/ipcalc32
1 files changed, 32 insertions, 0 deletions
diff --git a/package/base-files/default/bin/ipcalc b/package/base-files/default/bin/ipcalc
new file mode 100755
index 0000000..e8efa6b
--- /dev/null
+++ b/package/base-files/default/bin/ipcalc
@@ -0,0 +1,32 @@
+#!/bin/sh
+
+awk -f /usr/lib/common.awk -f - $* <<EOF
+BEGIN {
+ ipaddr=ip2int(ARGV[1])
+ netmask=ip2int(ARGV[2])
+ network=and(ipaddr,netmask)
+ broadcast=or(network,compl(netmask))
+
+ start=or(network,and(ip2int(ARGV[3]),compl(netmask)))
+ limit=network+1
+ if (start<limit) start=limit
+
+ end=start+ARGV[4]
+ limit=or(network,compl(netmask))-1
+ if (end>limit) end=limit
+
+ print "IP="int2ip(ipaddr)
+ print "NETMASK="int2ip(netmask)
+ print "BROADCAST="int2ip(broadcast)
+ print "NETWORK="int2ip(network)
+ print "PREFIX="32-bitcount(compl(netmask))
+
+ # range calculations:
+ # ipcalc <ip> <netmask> <start> <num>
+
+ if (ARGC > 3) {
+ print "START="int2ip(start)
+ print "END="int2ip(end-1)
+ }
+}
+EOF