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authornbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2006-11-22 23:30:57 +0000
committernbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2006-11-22 23:30:57 +0000
commit05adaa9794e41d02870a74a1ed7ba58cc59b9286 (patch)
treeb34e972b2aa8e22dc921b0b9967d811e7525e3bc /package/base-files/files/bin/ipcalc
parent356535ffd7bc1343ce6bc2fc367f788cc2c1bd24 (diff)
rename default/ to files/
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@5622 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package/base-files/files/bin/ipcalc')
-rwxr-xr-xpackage/base-files/files/bin/ipcalc32
1 files changed, 32 insertions, 0 deletions
diff --git a/package/base-files/files/bin/ipcalc b/package/base-files/files/bin/ipcalc
new file mode 100755
index 000000000..e8efa6b96
--- /dev/null
+++ b/package/base-files/files/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