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

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

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

SYNOPSIS

9           use Net::DNS;
10           $packet = new Net::DNS::Packet( ... );
11
12           $packet->header->do(1);                     # extended flag
13
14           $packet->edns->size(1280);                  # UDP payload size
15
16           $packet->edns->option( COOKIE => $cookie );
17
18           $packet->edns->print;
19
20           ;; EDNS version 0
21           ;;      flags:  8000
22           ;;      rcode:  NOERROR
23           ;;      size:   1280
24           ;;      option: COOKIE  => ( 7261776279746573 )
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DESCRIPTION

27       EDNS OPT pseudo resource record.
28
29       The OPT record supports EDNS protocol extensions and is not intended to
30       be created, accessed or modified directly by user applications.
31
32       All EDNS features are performed indirectly by operations on the objects
33       returned by the $packet->header and $packet->edns creator methods.  The
34       underlying mechanisms are entirely hidden from the user.
35

METHODS

37       The available methods are those inherited from the base class augmented
38       by the type-specific methods defined in this package.
39
40       Use of undocumented package features or direct access to internal data
41       structures is discouraged and could result in program termination or
42       other unpredictable behaviour.
43
44   version
45               $version = $rr->version;
46
47       The version of EDNS used by this OPT record.
48
49   size
50               $size = $packet->edns->size;
51               $more = $packet->edns->size(1280);
52
53       size() advertises the maximum size (octets) of UDP packet that can be
54       reassembled in the network stack of the originating host.
55
56   rcode
57               $extended_rcode   = $packet->header->rcode;
58               $incomplete_rcode = $packet->edns->rcode;
59
60       The 12 bit extended RCODE. The most significant 8 bits reside in the
61       OPT record. The least significant 4 bits can only be obtained from the
62       packet header.
63
64   flags
65               $edns_flags = $packet->edns->flags;
66
67               $do = $packet->header->do;
68               $packet->header->do(1);
69
70       16 bit field containing EDNS extended header flags.
71
72   options, option
73               @option = $packet->edns->options;
74
75               $octets = $packet->edns->option($option_code);
76
77               $packet->edns->option( COOKIE => $cookie );
78               $packet->edns->option( 10     => $cookie );
79
80       When called in a list context, options() returns a list of option codes
81       found in the OPT record.
82
83       When called in a scalar context with a single argument, option()
84       returns the uninterpreted octet string corresponding to the specified
85       option.  The method returns undef if the specified option is absent.
86
87       Options can be added or replaced by providing the (name => string)
88       pair.  The option is deleted if the value is undefined.
89
90       When option() is called in a list context with a single argument, the
91       returned array provides a structured interpretation appropriate to the
92       specified option.
93
94       For the example above:
95
96               %hash = $packet->edns->option(10);
97
98               {
99                   'CLIENT-COOKIE' => 'rawbytes',
100                   'SERVER-COOKIE' => undef
101               };
102
103       For some options, an array is more appropriate:
104
105               @algorithms = $packet->edns->option(6);
106
107       Similar forms of array syntax may be used to construct the option
108       value:
109
110               $packet->edns->option( DHU => [1, 2, 4] );
111               $packet->edns->option( 6   => (1, 2, 4) );
112
113               $packet->edns->option( COOKIE => {'CLIENT-COOKIE' => $cookie} );
114               $packet->edns->option( 10     => ('CLIENT-COOKIE' => $cookie) );
115

COPYRIGHT

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

126       Permission to use, copy, modify, and distribute this software and its
127       documentation for any purpose and without fee is hereby granted,
128       provided that the above copyright notice appear in all copies and that
129       both that copyright notice and this permission notice appear in
130       supporting documentation, and that the name of the author not be used
131       in advertising or publicity pertaining to distribution of the software
132       without specific prior written permission.
133
134       THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
135       OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
136       MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
137       IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
138       CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
139       TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
140       SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
141

NAME

SYNOPSIS

DESCRIPTION

METHODS

COPYRIGHT

LICENSE

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