Net::DNS::Domain(3pm)

1Net::DNS::Domain(3)   User Contributed Perl Documentation  Net::DNS::Domain(3)
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NAME

6       Net::DNS::Domain - DNS domains
7

SYNOPSIS

9           use Net::DNS::Domain;
10
11           $domain = new Net::DNS::Domain('example.com');
12           $name   = $domain->name;
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DESCRIPTION

15       The Net::DNS::Domain module implements a class of abstract DNS domain
16       objects with associated class and instance methods.
17
18       Each domain object instance represents a single DNS domain which has a
19       fixed identity throughout its lifetime.
20
21       Internally, the primary representation is a (possibly empty) list of
22       ASCII domain name labels, and optional link to an arbitrary origin
23       domain object topologically closer to the DNS root.
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25       The computational expense of Unicode character-set conversion is
26       partially mitigated by use of caches.
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METHODS

29   new
30           $object = new Net::DNS::Domain('example.com');
31
32       Creates a domain object which represents the DNS domain specified by
33       the character string argument. The argument consists of a sequence of
34       labels delimited by dots.
35
36       A character preceded by \ represents itself, without any special
37       interpretation.
38
39       Arbitrary 8-bit codes can be represented by \ followed by exactly three
40       decimal digits.  Character code points are ASCII, irrespective of the
41       character coding scheme employed by the underlying platform.
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43       Argument string literals should be delimited by single quotes to avoid
44       escape sequences being interpreted as octal character codes by the Perl
45       compiler.
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47       The character string presentation format follows the conventions for
48       zone files described in RFC1035.
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50       Users should be aware that non-ASCII domain names will be transcoded to
51       NFC before encoding, which is an irreversible process.
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53   name
54           $name = $domain->name;
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56       Returns the domain name as a character string corresponding to the
57       "common interpretation" to which RFC1034, 3.1, paragraph 9 alludes.
58
59       Character escape sequences are used to represent a dot inside a domain
60       name label and the escape character itself.
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62       Any non-printable code point is represented using the appropriate
63       numerical escape sequence.
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65   fqdn
66           @fqdn = $domain->fqdn;
67
68       Returns a character string containing the fully qualified domain name,
69       including the trailing dot.
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71   xname
72           $xname = $domain->xname;
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74       Interprets an extended name containing Unicode domain name labels
75       encoded as Punycode A-labels.
76
77       If decoding is not possible, the ACE encoded name is returned.
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79   label
80           @label = $domain->label;
81
82       Identifies the domain by means of a list of domain labels.
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84   string
85           $string = $object->string;
86
87       Returns a character string containing the fully qualified domain name
88       as it appears in a zone file.
89
90       Characters which are recognised by RFC1035 zone file syntax are
91       represented by the appropriate escape sequence.
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93   origin
94           $create = origin Net::DNS::Domain( $ORIGIN );
95           $result = &$create( sub{ new Net::DNS::RR( 'mx MX 10 a' ); } );
96           $expect = new Net::DNS::RR( "mx.$ORIGIN. MX 10 a.$ORIGIN." );
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98       Class method which returns a reference to a subroutine wrapper which
99       executes a given constructor in a dynamically scoped context where
100       relative names become descendents of the specified $ORIGIN.
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BUGS

103       Coding strategy is intended to avoid creating unnecessary argument
104       lists and stack frames. This improves efficiency at the expense of code
105       readability.
106
107       Platform specific character coding features are conditionally compiled
108       into the code.
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COPYRIGHT

111       Copyright (c)2009-2011,2017 Dick Franks.
112
113       All rights reserved.
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LICENSE

116       Permission to use, copy, modify, and distribute this software and its
117       documentation for any purpose and without fee is hereby granted,
118       provided that the above copyright notice appear in all copies and that
119       both that copyright notice and this permission notice appear in
120       supporting documentation, and that the name of the author not be used
121       in advertising or publicity pertaining to distribution of the software
122       without specific prior written permission.
123
124       THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
125       OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
126       MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
127       IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
128       CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
129       TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
130       SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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