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authorFelix Fietkau <nbd@openwrt.org>2007-03-17 13:31:13 +0000
committerFelix Fietkau <nbd@openwrt.org>2007-03-17 13:31:13 +0000
commit947bab0abbee71ec839eb4cb8fdf88f314d82f2a (patch)
treef22f2a9b00ca877b1b4a48e8019a17e038e4d835 /package/base-files/files/bin/ipcalc.sh
parent8dcd68617021e87d8654fcdf153ff33cb53759f5 (diff)
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upgrade dnsmasq to latest version, rewrite dnsmasq init script for uci, rename /bin/ipcalc to /bin/ipcalc.sh (fixes #1452)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6595 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package/base-files/files/bin/ipcalc.sh')
-rwxr-xr-xpackage/base-files/files/bin/ipcalc.sh32
1 files changed, 32 insertions, 0 deletions
diff --git a/package/base-files/files/bin/ipcalc.sh b/package/base-files/files/bin/ipcalc.sh
new file mode 100755
index 0000000000..e8efa6b96c
--- /dev/null
+++ b/package/base-files/files/bin/ipcalc.sh
@@ -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