oracular (3) Net::LDAP::Control.3pm.gz
NAME
Net::LDAP::Control - LDAPv3 control object base class
SYNOPSIS
use Net::LDAP::Control;
use Net::LDAP::Constant qw( LDAP_CONTROL_MANAGEDSAIT );
my $req_ctrl1 = Net::LDAP::Control->new( type => LDAP_CONTROL_MANAGEDSAIT );
my $req_ctrl2 = Net::LDAP::Control->new(
type => "1.2.3.4",
value => "help",
critical => 0
);
$mesg = $ldap->search( @args, control => [ $req_ctrl1, $req_ctrl2 ]);
my @res_ctrls = $mesg->control();
DESCRIPTION
"Net::LDAP::Control" is the base-class for LDAPv3 control objects.
Controls provide a mechanism that allows one to extend the semantics and arguments of LDAP operations.
Controls may be attached to LDAP operations, and only affect the semantics of the operation they are
attached to.
Controls sent by clients are termed request controls, and are set using the "control" option of the
respective LDAP operations. Controls sent by servers are called response controls, they can be found
using the "control()" method of the response message objects.
Servers announce the controls they support in the attribute "supportedControls" in their RootDSE.
CONSTRUCTORS
new ( ARGS )
ARGS is a list of name/value pairs, valid arguments are:
critical
A Boolean value, if TRUE and the control is unrecognized by the server or is inappropriate for
the requested operation then the server will return an error and the operation will not be
performed.
If FALSE and the control is unrecognized by the server or is inappropriate for the requested
operation then the server will ignore the control and perform the requested operation as if the
control was not given.
If absent, FALSE is assumed.
type
A dotted-decimal representation of an OBJECT IDENTIFIER which uniquely identifies the control.
This prevents conflicts between control names.
This may be omitted if the constructor is being called on a sub-class of Net::LDAP::Control which
has registered to be associated with an OID. If the constructor is being called on the
Net::LDAP::Control package, then this argument must be given. If the given OID has been
registered by a package, then the returned object will be of the type registered to handle that
OID.
value
Optional information associated with the control. Its format is specific to the particular
control.
from_asn ( ASN )
ASN is a HASH reference, normally extracted from a PDU. It will contain a "type" element and
optionally "critical" and "value" elements. On return ASN will be blessed into a package. If "type"
is a registered OID, then ASN will be blessed into the registered package, if not then ASN will be
blessed into Net::LDAP::Control.
This constructor is used internally by Net::LDAP and assumes that HASH passed contains a valid
control. It should be used with caution.
METHODS
In addition to the methods listed below, each of the named parameters to "new" is also available as a
method. "type" will return the OID of the control object. "value" and "critical" are set/get methods and
will return the current value for each attribute if called without arguments, but may also be called with
arguments to set new values.
error ()
If there has been an error returns a description of the error, otherwise it will return "undef"
init ()
"init" will be called as the last step in both constructors. What it does will depend on the sub-
class. It must always return the object.
register ( OID )
"register" is provided for sub-class implementors. It should be called as a class method on a sub-
class of Net::LDAP::Control with the OID that the class will handle. Net::LDAP::Control will remember
this class and OID pair and use it in the following situations.
• "new" is called as a class method on the Net::LDAP::Control package and OID is passed as the
type. The returned object will be blessed into the package that registered the OID.
• "new" is called as a class method on a registered package and the "type" is not specified. The
"type" will be set to the OID registered by that package.
• "from_asn" is called to construct an object from ASN. The returned object will be blessed into
the package which was registered to handle the OID in the ASN.
( to_asn )
Returns a structure suitable for passing to Convert::ASN1 for encoding. This method will be called by
Net::LDAP when the control is used.
The base class implementation of this method will call the "value" method without arguments to allow
a sub-class to encode it's value. Sub-classes should not need to override this method.
valid ()
Returns true if the object is valid and can be encoded. The default implementation for this method is
to return TRUE if there is no error, but sub-classes may override that.
SEE ALSO
Net::LDAP, Net::LDAP::RootDSE, Net::LDAP::Control::Assertion, Net::LDAP::Control::DontUseCopy,
Net::LDAP::Control::EntryChange, Net::LDAP::Control::ManageDsaIT, Net::LDAP::Control::MatchedValues,
Net::LDAP::Control::Paged, Net::LDAP::Control::PasswordPolicy, Net::LDAP::Control::PersistentSearch,
Net::LDAP::Control::PostRead, Net::LDAP::Control::PreRead, Net::LDAP::Control::ProxyAuth,
Net::LDAP::Control::Relax, Net::LDAP::Control::Sort, Net::LDAP::Control::SortResult,
Net::LDAP::Control::SyncDone, Net::LDAP::Control::SyncRequest, Net::LDAP::Control::SyncState,
Net::LDAP::Control::TreeDelete, Net::LDAP::Control::VLV, Net::LDAP::Control::VLVResponse
AUTHOR
Graham Barr <gbarr@pobox.com> Please report any bugs, or post any suggestions, to the perl-ldap mailing list <perl-ldap@perl.org>
COPYRIGHT
Copyright (c) 1999-2004 Graham Barr. All rights reserved. This program is free software; you can
redistribute it and/or modify it under the same terms as Perl itself.