contrib/package/meshwizard/files/usr/bin/meshwizard/helpers/check-range-in-range.sh

   1 #!/bin/sh
   2 # Checks whether a netrange is inside another netrange, returns 1 if true
   3 # Takes two arguments: $1: net from which we want to know if it is inside $2
   4 # nets need to be given in CIDR notation
   5
   6 dir=$(dirname $0)
   7
   8 awk -f $dir/common.awk -f - $* <<EOF
   9 BEGIN {
  10
  11         slpos=index(ARGV[1],"/")
  12         ipaddr=ip2int(substr(ARGV[1],0,slpos-1))
  13         netmask=compl(2**(32-int(substr(ARGV[1],slpos+1)))-1)
  14         network=and(ipaddr,netmask)
  15         broadcast=or(network,compl(netmask))
  16
  17         slpos2=index(ARGV[2],"/")
  18         ipaddr2=ip2int(substr(ARGV[2],0,slpos2-1))
  19         netmask2=compl(2**(32-int(substr(ARGV[2],slpos2+1)))-1)
  20         network2=and(ipaddr2,netmask2)
  21         broadcast2=or(network2,compl(netmask2))
  22
  23         if (network >= network2) {
  24                 if (network <= broadcast2) {
  25                         if (broadcast <= broadcast2) {
  26                                 print "1"
  27                         }
  28                 }
  29         }
  30 }
  31 EOF