c:\@Work\Perl\monks>perl -wMstrict -le
"use Test::More 'no_plan';
use Test::NoWarnings;
;;
VECTOR:
for my $ar_vector (
[ '1.133.123.123', 1 ], [ '1.2.3.4', 1 ], [ '11.22.33.44', 1 ],
[ '0.0.0.0', 1 ], [ '255.255.255.255', 1 ],
[ '', '' ], [ '1asdf1.133.123.123', '' ], [ '12341.133.', '' ],
[ '0.0.0.256', '' ], [ 'not at all valid', '' ],
[ '1.2.3.4.5', '' ], [ '1111.2.3.1111', '' ],
) {
my ($ip, $valid) = @$ar_vector;
;;
my $status = $valid ? 'valid' : 'INVALID';
is IP_valid($ip), $valid, qq{'$ip' $status};
}
;;
done_testing;
;;
;;
use Regexp::Common qw(net);
;;
sub IP_valid {
my ($ip) = @_;
return $ip =~ m{ \A $RE{net}{IPv4} \z }xms;
}
"
ok 1 - '1.133.123.123' valid
ok 2 - '1.2.3.4' valid
ok 3 - '11.22.33.44' valid
ok 4 - '0.0.0.0' valid
ok 5 - '255.255.255.255' valid
ok 6 - '' INVALID
ok 7 - '1asdf1.133.123.123' INVALID
ok 8 - '12341.133.' INVALID
ok 9 - '0.0.0.256' INVALID
ok 10 - 'not at all valid' INVALID
ok 11 - '1.2.3.4.5' INVALID
ok 12 - '1111.2.3.1111' INVALID
1..12
ok 13 - no warnings
1..13
Note that, by design, $RE{net}{IPv4} is not "anchored", so by itself it will match, e.g.:
c:\@Work\Perl\monks>perl -wMstrict -le
"use Regexp::Common qw(net);
;;
print qq{matches IP of '$1'}
if '99999.1.2.9999' =~ m{ ($RE{net}{IPv4}) }xms;
"
matches IP of '99.1.2.99'
which may or may not be what you want. The \A \z anchors in the example code above address this (quite intentional) feature.
Give a man a fish: <%-{-{-{-<
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