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Regexp::Common::net(3)               User Contributed Perl Documentation              Regexp::Common::net(3)



NAME
       Regexp::Common::net -- provide regexes for IPv4 addresses.

SYNOPSIS
           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";
           }

DESCRIPTION
       Please consult the manual of Regexp::Common 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 Regexp::Common):

       $1  captures the entire match

       $2  captures the first component of the address

       $3  captures the second component of the address

       $4  captures the third component of the address

       $5  captures the final component of the address

   $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 Regexp::Common):

       $1  captures the entire match

       $2  captures the first component of the address

       $3  captures the second component of the address

       $4  captures the third component of the address

       $5  captures the fourth component of the address

       $6  captures the fifth component of the address

       $7  captures the sixth and final component of the address

       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}{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).

REFERENCES
       RFC 1035
           Mockapetris, P.: DOMAIN NAMES - IMPLEMENTATION AND SPECIFICATION.  November 1987.

SEE ALSO
       Regexp::Common for a general description of how to use this interface.

AUTHOR
       Damian Conway damian@conway.org.

MAINTAINANCE
       This package is maintained by Abigail (regexp-common@abigail.be).

BUGS AND IRRITATIONS
       Bound to be plenty.

       For a start, there are many common regexes missing.  Send them in to regexp-common@abigail.be.

LICENSE and COPYRIGHT
       This software is Copyright (c) 2001 - 2009, 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.



perl v5.12.5                                     2010-02-23                           Regexp::Common::net(3)