Net::DNS::RR::OPT(3pm)

1Net::DNS::RR::OPT(3)  User Contributed Perl Documentation Net::DNS::RR::OPT(3)
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3
4

NAME

6       Net::DNS::RR::OPT - DNS OPT resource record
7

SYNOPSIS

9           use Net::DNS;
10           $packet = Net::DNS::Packet->new( ... );
11
12           $packet->header->do(1);                     # extended flag
13
14           $packet->edns->size(1280);                  # UDP payload size
15
16           $packet->edns->option( COOKIE => 'rawbytes' );
17
18           $packet->edns->print;
19
20           ;; EDNS version 0
21           ;;      flags:  8000
22           ;;      rcode:  NOERROR
23           ;;      size:   1280
24           ;;      option: COOKIE => ( 7261776279746573 )
25           ;;              DAU    => ( 8, 10, 13, 14, 15, 16 )
26           ;;              DHU    => ( 1, 2, 4 )
27           ;;              EXTENDED-ERROR => ( INFO-CODE => 123, EXTRA-TEXT =>  )
28

DESCRIPTION

30       EDNS OPT pseudo resource record.
31
32       The OPT record supports EDNS protocol extensions and is not intended to
33       be created, accessed or modified directly by user applications.
34
35       All EDNS features are performed indirectly by operations on the objects
36       returned by the $packet->header and $packet->edns creator methods.  The
37       underlying mechanisms are entirely hidden from the user.
38

METHODS

40       The available methods are those inherited from the base class augmented
41       by the type-specific methods defined in this package.
42
43       Use of undocumented package features or direct access to internal data
44       structures is discouraged and could result in program termination or
45       other unpredictable behaviour.
46
47   version
48           $version = $rr->version;
49           $rr->version( $version );
50
51       The version of EDNS supported by this OPT record.
52
53   size
54               $size = $packet->edns->size;
55               $more = $packet->edns->size(1280);
56
57       size() advertises the maximum size (octets) of UDP packet that can be
58       reassembled in the network stack of the originating host.
59
60   rcode
61               $extended_rcode   = $packet->header->rcode;
62               $incomplete_rcode = $packet->edns->rcode;
63
64       The 12 bit extended RCODE. The most significant 8 bits reside in the
65       OPT record. The least significant 4 bits can only be obtained from the
66       packet header.
67
68   flags
69               $edns_flags = $packet->edns->flags;
70
71               $do = $packet->header->do;
72               $packet->header->do(1);
73
74       16 bit field containing EDNS extended header flags.
75
76   options, option
77               @option = $packet->edns->options;
78
79               $octets = $packet->edns->option($option_code);
80
81               $packet->edns->option( COOKIE => $octets );
82               $packet->edns->option( 10     => $octets );
83
84       When called in a list context, options() returns a list of option codes
85       found in the OPT record.
86
87       When called in a scalar context with a single argument, option()
88       returns the uninterpreted octet string corresponding to the specified
89       option.  The method returns undef if the specified option is absent.
90
91       Options can be added or replaced by providing the (name => value) pair.
92       The option is deleted if the value is undefined.
93
94       When option() is called in a list context with a single argument, the
95       returned values provide a structured interpretation appropriate to the
96       specified option.
97
98       For example:
99
100               @algorithms = $packet->edns->option('DAU');
101
102       For some options, a hash table is more convenient:
103
104               %hash_table = $packet->edns->option(15);
105               $info_code  = $hash_table{'INFO-CODE'};
106               $extra_text = $hash_table{'EXTRA-TEXT'};
107
108       Similar forms of array or hash syntax may be used to construct the
109       option value:
110
111               $packet->edns->option( DHU => [1, 2, 4] );
112
113               $packet->edns->option( EXPIRE => {'EXPIRE-TIMER' => 604800} );
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COPYRIGHT

116       Copyright (c)2001,2002 RIPE NCC.  Author Olaf M. Kolkman.
117
118       Portions Copyright (c)2012,2017-2020 Dick Franks.
119
120       All rights reserved.
121
122       Package template (c)2009,2012 O.M.Kolkman and R.W.Franks.
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LICENSE

125       Permission to use, copy, modify, and distribute this software and its
126       documentation for any purpose and without fee is hereby granted,
127       provided that the above copyright notice appear in all copies and that
128       both that copyright notice and this permission notice appear in
129       supporting documentation, and that the name of the author not be used
130       in advertising or publicity pertaining to distribution of the software
131       without specific prior written permission.
132
133       THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
134       OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
135       MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
136       IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
137       CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
138       TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
139       SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
140

NAME

SYNOPSIS

DESCRIPTION

METHODS

COPYRIGHT

LICENSE

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