Regexp::Common::net -- provide regexes for IPv4 addresses. |
$RE{net}{IPv4}
$RE{net}{IPv4}{dec}{-sep}
$RE{net}{IPv4}{hex}{-sep}
$RE{net}{IPv4}{oct}{-sep}
$RE{net}{IPv4}{bin}{-sep}
$RE{net}{MAC}
$RE{net}{MAC}{dec}{-sep}
$RE{net}{MAC}{hex}{-sep}
$RE{net}{MAC}{oct}{-sep}
$RE{net}{MAC}{bin}{-sep}
$RE{net}{IPv6}{-sep => ':'}{-style => 'HeX'}
$RE{net}{domain}
Regexp::Common::net -- provide regexes for IPv4 addresses.
use Regexp::Common qw /net/;
while (<>) { /$RE{net}{IPv4}/ and print "Dotted decimal IP address"; /$RE{net}{IPv4}{hex}/ and print "Dotted hexadecimal IP address"; /$RE{net}{IPv4}{oct}{-sep => ':'}/ and print "Colon separated octal IP address"; /$RE{net}{IPv4}{bin}/ and print "Dotted binary IP address"; /$RE{net}{MAC}/ and print "MAC address"; /$RE{net}{MAC}{oct}{-sep => " "}/ and print "Space separated octal MAC address"; }
Please consult the manual of the Regexp::Common manpage for a general description of the works of this interface.
Do not use this module directly, but load it via Regexp::Common.
This modules gives you regular expressions for various style IPv4 and MAC (or ethernet) addresses.
$RE{net}{IPv4}
Returns a pattern that matches a valid IP address in ``dotted decimal''.
Note that while 318.99.183.11
is not a valid IP address, it does
match /$RE{net}{IPv4}/
, but this is because 318.99.183.11
contains
a valid IP address, namely 18.99.183.11
. To prevent the unwanted
matching, one needs to anchor the regexp: /^$RE{net}{IPv4}$/
.
For this pattern and the next four, under -keep
(See the Regexp::Common manpage):
$RE{net}{IPv4}{dec}{-sep}
Returns a pattern that matches a valid IP address in ``dotted decimal''
If -sep=P
is specified the pattern P is used as the separator.
By default P is qr/[.]/
.
$RE{net}{IPv4}{hex}{-sep}
Returns a pattern that matches a valid IP address in ``dotted hexadecimal'',
with the letters A
to F
capitalized.
If -sep=P
is specified the pattern P is used as the separator.
By default P is qr/[.]/
. -sep=""
and
-sep=" "
are useful alternatives.
$RE{net}{IPv4}{oct}{-sep}
Returns a pattern that matches a valid IP address in ``dotted octal''
If -sep=P
is specified the pattern P is used as the separator.
By default P is qr/[.]/
.
$RE{net}{IPv4}{bin}{-sep}
Returns a pattern that matches a valid IP address in ``dotted binary''
If -sep=P
is specified the pattern P is used as the separator.
By default P is qr/[.]/
.
$RE{net}{MAC}
Returns a pattern that matches a valid MAC or ethernet address as colon separated hexadecimals.
For this pattern, and the next four, under -keep
(See the Regexp::Common manpage):
This pattern, and the next four, have a subs
method as well, which
will transform a matching MAC address into so called canonical format.
Canonical format means that every component of the address will be
exactly two hexadecimals (with a leading zero if necessary), and the
components will be separated by a colon.
The subs
method will not work for binary MAC addresses if the
Perl version predates 5.6.0.
$RE{net}{MAC}{dec}{-sep}
Returns a pattern that matches a valid MAC address as colon separated decimals.
If -sep=P
is specified the pattern P is used as the separator.
By default P is qr/:/
.
$RE{net}{MAC}{hex}{-sep}
Returns a pattern that matches a valid MAC address as colon separated
hexadecimals, with the letters a
to f
in lower case.
If -sep=P
is specified the pattern P is used as the separator.
By default P is qr/:/
.
$RE{net}{MAC}{oct}{-sep}
Returns a pattern that matches a valid MAC address as colon separated octals.
If -sep=P
is specified the pattern P is used as the separator.
By default P is qr/:/
.
$RE{net}{MAC}{bin}{-sep}
Returns a pattern that matches a valid MAC address as colon separated binary numbers.
If -sep=P
is specified the pattern P is used as the separator.
By default P is qr/:/
.
$RE{net}{IPv6}{-sep => ':'}{-style => 'HeX'}
Returns a pattern matching IPv6 numbers. An IPv6 address consists of
eigth groups of four hexadecimal digits, separated by colons. In each
group, leading zeros may be omitted. Two or more consecutive groups
consisting of only zeros may be omitted (including any colons separating
them), resulting into two sets of groups, separated by a double colon.
(Each of the groups may be empty; ::
is a valid address, equal to
0000:0000:0000:0000:0000:0000:0000:0000
). The hex numbers may be
in either case.
If the -sep
option is used, its argument is a pattern that matches
the separator that separates groups. This defaults to :
. The
-style
option is used to denote which case the hex numbers may be.
The default style, 'HeX'
indicates both lower case letters 'a'
to 'f'
and upper case letters 'A'
to 'F'
will be
matched. The style 'HEX'
restricts matching to upper case letters,
and 'hex'
only matches lower case letters.
If {-keep}
is used, $1
to $9
will be set. $1
will be set to the matched address, while $2
to $9
will be
set to each matched group. If a group is omitted because it contains all
zeros, its matching variable will be the empty string.
Example:
"2001:db8:85a3::8a2e:370:7334" =~ /$RE{net}{IPv6}{-keep}/; print $2; # '2001' print $4; # '85a3' print $6; # Empty string print $8; # '370'
Perl 5.10 (or later) is required for this pattern.
$RE{net}{domain}
Returns a pattern to match domains (and hosts) as defined in RFC 1035. Under I{-keep} only the entire domain name is returned.
RFC 1035 says that a single space can be a domainname too. So, the
pattern returned by $RE{net}{domain}
recognizes a single space
as well. This is not always what people want. If you want to recognize
domainnames, but not a space, you can do one of two things, either use
/(?! )$RE{net}{domain}/
or use the {-nospace}
option (without an argument).
RFC 1035 does not allow host or domain names to start with a digits;
however, this restriction is relaxed in RFC 1101; this RFC allows host
and domain names to start with a digit, as long as the first part of
a domain does not look like an IP address. If the {-rfc1101}
option
is given (as in $RE {net} {domain} {-rfc1101}
), we will match using
the relaxed rules.
the Regexp::Common manpage for a general description of how to use this interface.
Damian Conway damian@conway.org.
This package is maintained by Abigail (regexp-common@abigail.be).
Bound to be plenty.
For a start, there are many common regexes missing. Send them in to regexp-common@abigail.be.
This software is Copyright (c) 2001 - 2013, Damian Conway and Abigail.
This module is free software, and maybe used under any of the following licenses:
1) The Perl Artistic License. See the file COPYRIGHT.AL. 2) The Perl Artistic License 2.0. See the file COPYRIGHT.AL2. 3) The BSD Licence. See the file COPYRIGHT.BSD. 4) The MIT Licence. See the file COPYRIGHT.MIT.
Regexp::Common::net -- provide regexes for IPv4 addresses. |