upgrade dnsmasq to latest version, rewrite dnsmasq init script for uci, rename /bin...

[openwrt-10.03/.git] / package / base-files / files / bin / ipcalc.sh

diff --git a/package/base-files/files/bin/ipcalc.sh b/package/base-files/files/bin/ipcalc.sh
new file mode 100755 (executable)
index 0000000..e8efa6b
--- /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