Add new meshwizard (WIP)

[project/luci.git] / contrib / package / meshwizard / files / usr / bin / meshwizard / helpers / ipcalc-cidr.sh

diff --git a/contrib/package/meshwizard/files/usr/bin/meshwizard/helpers/ipcalc-cidr.sh b/contrib/package/meshwizard/files/usr/bin/meshwizard/helpers/ipcalc-cidr.sh
new file mode 100755 (executable)
index 0000000..39d051e
--- /dev/null
+++ b/contrib/package/meshwizard/files/usr/bin/meshwizard/helpers/ipcalc-cidr.sh
@@ -0,0 +1,41 @@
+#!/bin/sh
+dir=$(dirname $0)
+awk -f $dir/common.awk -f - $* <<EOF
+BEGIN {
+       slpos=index(ARGV[1],"/")
+       if (slpos == 0) {
+               ipaddr=ip2int(ARGV[1])
+               netmask=ip2int(ARGV[2])
+       } else {
+               ipaddr=ip2int(substr(ARGV[1],0,slpos-1))
+               netmask=compl(2**(32-int(substr(ARGV[1],slpos+1)))-1)
+               ARGV[4]=ARGV[3]
+               ARGV[3]=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)
+       }
+}
+EOF