use strict;
use warnings;
use Test::More;
use NetAddr::IP;

my @routes = ( [ qw(192.168.0.0/24 192.168.0.1) ],
               [ qw(10.10.10.0/24  10.10.10.1)  ],
               [ qw(12.162.8.11/28 default)     ],
             );


is( calc_route( "192.168.0.88" ), "192.168.0.1",  "first route" );
is( calc_route( "192.168.1.88" ), "default",      "close to first route but default" );
is( calc_route( "10.10.10.12"  ), "10.10.10.1",   "second route (example IP)" );
is( calc_route( "12.162.8.3"   ), "default",      "explicit default" );
is( calc_route( "1.2.3.4"      ), "default",      "else: default" );

done_testing;



sub calc_route {
  my $ip = NetAddr::IP->new( shift );

  for my $test_subnet ( @routes ) {
    if ( $ip->within( NetAddr::IP->new( $test_subnet->[0] ) ) ) {
      return $test_subnet->[1];
    }
  }

  return 'default';
}