NAME¶
Net::DNS::RR::SOA - DNS SOA resource record
SYNOPSIS¶
use Net::DNS;
$rr = new Net::DNS::RR('name SOA mname rname 0 14400 3600 1814400 3600');
DESCRIPTION¶
Class for DNS Start of Authority (SOA) resource records.
METHODS¶
The available methods are those inherited from the base class augmented by the
type-specific methods defined in this package.
Use of undocumented package features or direct access to internal data
structures is discouraged and could result in program termination or other
unpredictable behaviour.
mname¶
$mname = $rr->mname;
$rr->mname( $mname );
The domain name of the name server that was the original or primary source of
data for this zone.
rname¶
$rname = $rr->rname;
$rr->rname( $rname );
The mailbox which identifies the person responsible for maintaining this zone.
serial¶
$serial = $rr->serial;
$serial = $rr->serial(value);
Unsigned 32 bit version number of the original copy of the zone. Zone transfers
preserve this value.
RFC1982 defines a strict (irreflexive) partial ordering for zone serial numbers.
The serial number will be incremented unless the replacement value argument
satisfies the ordering constraint.
refresh¶
$refresh = $rr->refresh;
$rr->refresh( $refresh );
A 32 bit time interval before the zone should be refreshed.
retry¶
$retry = $rr->retry;
$rr->retry( $retry );
A 32 bit time interval that should elapse before a failed refresh should be
retried.
expire¶
$expire = $rr->expire;
$rr->expire( $expire );
A 32 bit time value that specifies the upper limit on the time interval that can
elapse before the zone is no longer authoritative.
minimum¶
$minimum = $rr->minimum;
$rr->minimum( $minimum );
The unsigned 32 bit minimum TTL field that should be exported with any RR from
this zone.
Zone Serial Number Management¶
The internal logic of the
serial() method offers support for several
widely used zone serial numbering policies.
Strictly Sequential¶
$successor = $soa->serial( SEQUENTIAL );
The existing serial number is incremented modulo 2**32 because the value
returned by the auxiliary
SEQUENTIAL() function can never satisfy the
serial number ordering constraint.
Date Encoded¶
$successor = $soa->serial( YYYYMMDDxx );
The 32 bit value returned by the auxiliary
YYYYMMDDxx() function will be
used if it satisfies the ordering constraint, otherwise the serial number will
be incremented as above.
Serial number increments must be limited to 100 per day for the date information
to remain useful.
Time Encoded¶
$successor = $soa->serial( UNIXTIME );
The 32 bit value returned by the auxiliary
UNIXTIME() function will used
if it satisfies the ordering constraint, otherwise the existing serial number
will be incremented as above.
COPYRIGHT¶
Copyright (c)1997-2002 Michael Fuhr.
Portions Copyright (c)2002-2004 Chris Reinhardt.
Portions Copyright (c)2010,2012 Dick Franks.
All rights reserved.
This program is free software; you may redistribute it and/or modify it under
the same terms as Perl itself.
Package template (c)2009,2012 O.M.Kolkman and R.W.Franks.
SEE ALSO¶
perl, Net::DNS, Net::DNS::RR, RFC1035 Section 3.3.13, RFC1982