lib::Net::DNS::User)Contributed Perl Documentlib::Net::DNS::RR(3)NAMENet::DNS::RR - DNS Resource Record class
SYNOPSIS
use Net::DNS::RRDESCRIPTIONNet::DNS::RR is the base class for DNS Resource Record
(RR) objects. See also the manual pages for each RR type.
METHODS
WARNING!!! Don't assume the RR objects you receive from a
query are of a particular type -- always check an object's
type before calling any of its methods. If you call an
unknown method, you'll get a nasty warning message and
Net::DNS::RR will return undef to the caller.
new (from string)
$a = new Net::DNS::RR("foo.bar.com. 86400 A 10.1.2.3");
$mx = new Net::DNS::RR("bar.com. 7200 MX 10 mailhost.bar.com.");
$cname = new Net::DNS::RR("www.bar.com 300 IN CNAME www1.bar.com");
$txt = new Net::DNS::RR("baz.bar.com 3600 HS TXT 'text record'");
Returns a Net::DNS::RR object of the appropriate type and
initialized from the string passed by the user. The
format of the string is that used in zone files, and is
compatible with the string returned by
Net::DNS::RR->string.
The name and RR type are required; all other information
is optional. If omitted, the TTL defaults to 0 and the RR
class defaults to IN. Omitting the optional fields is
useful for creating the empty RDATA sections required for
certain dynamic update operations. See the
Net::DNS::Update manual page for additional examples.
All names must be fully qualified. The trailing dot (.)
is optional.
new (from hash)
$rr = new Net::DNS::RR(
Name => "foo.bar.com",
TTL => 86400,
Class => "IN",
Type => "A",
Address => "10.1.2.3",
);
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$rr = new Net::DNS::RR(
Name => "foo.bar.com",
Type => "A",
);
Returns an RR object of the appropriate type, or a
Net::DNS::RR object if the type isn't implemented. See
the manual pages for each RR type to see what fields the
type requires.
The Name and Type fields are required; all others are
optional. If omitted, TTL defaults to 0 and Class
defaults to IN. Omitting the optional fields is useful
for creating the empty RDATA sections required for certain
dynamic update operations.
The fields are case-insensitive, but starting each with
uppercase is recommended.
print
$rr->print;
Prints the record to the standard output. Calls the
string method to get the RR's string representation.
string
print $rr->string, "\n";
Returns a string representation of the RR. Calls the
rdatastr method to get the RR-specific data.
rdatastr
$s = $rr->rdatastr;
Returns a string containing RR-specific data. Subclasses
will need to implement this method.
name
$name = $rr->name;
Returns the record's domain name.
type
$type = $rr->type;
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Returns the record's type.
class
$class = $rr->class;
Returns the record's class.
ttl
$ttl = $rr->ttl;
Returns the record's time-to-live (TTL).
rdlength
$rdlength = $rr->rdlength;
Returns the length of the record's data section.
rdata
$rdata = $rr->rdata
Returns the record's data section as binary data.
BUGS
This version of Net::DNS::RR does little sanity checking
on user-created RR objects.
COPYRIGHT
Copyright (c) 1997 Michael Fuhr. All rights reserved.
This program is free software; you can redistribute it
and/or modify it under the same terms as Perl itself.
SEE ALSO
the perl(1) manpage, the Net::DNS manpage, the
Net::DNS::Resolver manpage, the Net::DNS::Packet manpage,
the Net::DNS::Update manpage, the Net::DNS::Header
manpage, the Net::DNS::Question manpage, RFC 1035 Section
4.1.3
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