1Net::LDAP(3) User Contributed Perl Documentation Net::LDAP(3)
2
6 Net::LDAP - Lightweight Directory Access Protocol
7
9 use Net::LDAP;
10 $ldap = Net::LDAP->new( 'ldap.example.com' ) or die "$@";
12 $mesg = $ldap->bind; # anonymous bind
14 $mesg->code and die $mesg->error; # check for errors
16 $srch = $ldap->search( base => "c=US", # perform a search
18 filter => "(&(sn=Barr)(o=Texas Instruments))"
19 );
20 $srch->code and die $srch->error; # check for errors
22 foreach $entry ($srch->entries) { $entry->dump; }
24 $mesg = $ldap->unbind; # take down session
26 $ldap = Net::LDAP->new( 'ldaps://ldap.example.com' ) or die "$@";
29 # simple bind with DN and password
31 $mesg = $ldap->bind( 'cn=root, o=University of Michigan, c=us',
32 password => 'secret'
33 );
34 $mesg->code and die $mesg->error; # check for errors
36 $result = $ldap->add( 'cn=Barbara Jensen, o=University of Michigan, c=US',
38 attrs => [
39 cn => ['Barbara Jensen', 'Barbs Jensen'],
40 sn => 'Jensen',
41 mail => 'b.jensen@umich.edu',
42 objectclass => ['top', 'person',
43 'organizationalPerson',
44 'inetOrgPerson' ],
45 ]
46 );
47 $result->code and warn "failed to add entry: ", $result->error;
49 $mesg = $ldap->unbind; # take down session
51
53 Net::LDAP is a collection of modules that implements a LDAP services
54 API for Perl programs. The module may be used to search directories or
55 perform maintenance functions such as adding, deleting or modifying
56 entries.
57 This document assumes that the reader has some knowledge of the LDAP
59 protocol.
60
62 new ( HOST, OPTIONS )
63 Creates a new Net::LDAP object and opens a connection to the named
64 host.
65 "HOST" may be a host name or an IP address. TCP port may be
67 specified after the host name followed by a colon (such as
68 localhost:10389). The default TCP port for LDAP is 389.
69 You can also specify a URI, such as 'ldaps://127.0.0.1:666' or
71 'ldapi://%2fvar%2flib%2fldap_sock'. Note that '%2f's in the LDAPI
72 socket path will be translated into '/'. This is to support LDAP
73 query options like base, search etc. although the query part of the
74 URI will be ignored in this context. If port was not specified in
75 the URI, the default is either 389 or 636 for 'LDAP' and 'LDAPS'
76 schemes respectively.
77 "HOST" may also be a reference to an array of hosts, host-port
79 pairs or URIs to try. Each will be tried in order until a
80 connection is made. Only when all have failed will the result of
81 "undef" be returned.
82 port => N
84 Port to connect to on the remote server. May be overridden by
85 "HOST".
86 scheme => 'ldap' | 'ldaps' | 'ldapi'
88 Connection scheme to use when not using an URI as "HOST".
89 (Default: ldap)
90 keepalive => 1
92 If given, set the socket's SO_KEEPALIVE option depending on the
93 Boolean value of the option. (Default: use system default)
94 Failures in changing the socket's SO_KEEPALIVE option are
96 ignored.
97 timeout => N
99 Timeout passed to IO::Socket when connecting the remote server.
100 (Default: 120)
101 multihomed => N
103 Will be passed to IO::Socket as the "MultiHomed" parameter when
104 connecting to the remote server
105 localaddr => HOST
107 Will be passed to IO::Socket as the "LocalAddr" parameter,
108 which sets the client's IP address (as opposed to the server's
109 IP address.)
110 debug => N
112 Set the debug level. See the debug method for details.
113 async => 1
115 Perform all operations asynchronously.
116 onerror => 'die' | 'warn' | 'undef' | sub { ... }
118 In synchronous mode, change what happens when an error is
119 detected.
120 'die'
122 Net::LDAP will croak whenever an error is detected.
123 'warn'
125 Net::LDAP will warn whenever an error is detected.
126 'undef'
128 Net::LDAP will warn whenever an error is detected and "-w"
129 is in effect. The method that was called will return
130 "undef".
131 Note this value is the string 'undef', not the "undef"
133 value.
134 sub { ... }
136 The given sub will be called in a scalar context with a
137 single argument, the result message. The value returned
138 will be the return value for the method that was called.
139 version => N
141 Set the protocol version being used (default is LDAPv3). This
142 is useful if you want to talk to an old server and therefore
143 have to use LDAPv2.
144 raw => REGEX
146 Use REGEX to denote the names of attributes that are to be
147 considered binary in search results.
148 When this option is given, Net::LDAP converts all values of
150 attributes not matching this REGEX into Perl UTF-8 strings so
151 that the regular Perl operators (pattern matching, ...) can
152 operate as one expects even on strings with international
153 characters.
154 If this option is not given, attribute values are treated as
156 byte strings.
157 Example: raw => qr/(?i:^jpegPhoto|;binary)/
159 inet4 => N
161 inet6 => N
162 Try to connect to the server using the specified IP protocol
163 only, i.e. either IPv4 or IPv6. If the protocol selected is
164 not supported, connecting will fail.
165 The default is to use any of the two protocols.
167 Example
169 $ldap = Net::LDAP->new( 'remote.host', async => 1 );
171 LDAPS connections have some extra valid options, see the start_tls
173 method for details. Note the default port for LDAPS is 636, and the
174 default value for 'sslversion' is the value used as default by
175 IO::Socket::SSL.
176 For LDAPI connections, HOST is actually the location of a UNIX
178 domain socket to connect to. The default location is
179 '/var/run/ldapi'.
180
182 Each of the following methods take as arguments some number of fixed
183 parameters followed by options, these options are passed in a named
184 fashion, for example
185 $mesg = $ldap->bind( "cn=me,o=example", password => "mypasswd");
187 The return value from these methods is an object derived from the
189 Net::LDAP::Message class. The methods of this class allow you to
190 examine the status of the request.
191 abandon ( ID, OPTIONS )
193 Abandon a previously issued request. "ID" may be a number or an
194 object which is a sub-class of Net::LDAP::Message, returned from a
195 previous method call.
196 control => CONTROL
198 control => [ CONTROL, ... ]
199 See "CONTROLS" below
200 callback => CALLBACK
202 See "CALLBACKS" below
203 Example
205 $res = $ldap->search( @search_args );
207 $mesg = $ldap->abandon( $res ); # This could be written as $res->abandon
209 add ( DN, OPTIONS )
211 Add a new entry to the directory. "DN" can be either a
212 Net::LDAP::Entry object or a string.
213 attrs => [ ATTR => VALUE, ... ]
215 "VALUE" should be a string if only a single value is wanted, or
216 a reference to an array of strings if multiple values are
217 wanted.
218 This argument is not used if "DN" is a Net::LDAP::Entry object.
220 control => CONTROL
222 control => [ CONTROL, ... ]
223 See "CONTROLS" below
224 callback => CALLBACK
226 See "CALLBACKS" below
227 Example
229 # $entry is an object of class Net::LDAP::Entry
231 $mesg = $ldap->add( $entry );
232 $mesg = $ldap->add( $dn,
234 attrs => [
235 name => 'Graham Barr',
236 attr => 'value1',
237 attr => 'value2',
238 multi => [qw(value1 value2)]
239 ]
240 );
241 bind ( DN, OPTIONS )
243 Bind (log in) to the server. "DN" is the DN to bind with. An
244 anonymous bind may be done by calling bind without any arguments.
245 control => CONTROL
247 control => [ CONTROL, ... ]
248 See "CONTROLS" below
249 callback => CALLBACK
251 See "CALLBACKS" below
252 noauth | anonymous => 1
254 Bind without any password. The value passed with this option is
255 ignored.
256 password => PASSWORD
258 Bind with the given password.
259 sasl => SASLOBJ
261 Bind using a SASL mechanism. The argument given should be a
262 sub-class of Authen::SASL or an Authen::SASL client connection
263 by calling "client_new" on an Authen::SASL object.
264 If passed an Authen::SASL object then "client_new" will be
266 called to create a client connection object. The hostname
267 passed by "Net::LDAP" to "client_new" can be set using the
268 "sasl_host" option below. If this is not correct for your
269 environment, consider calling "client_new" yourself and passing
270 the client connection object as "SASLOBJ".
271 sasl_host => SASLHOST
273 When binding using SASL, allow the hostname used in the SASL
274 communication to differ from the hostname connected to.
275 If "SASLHOST" evaluates to TRUE, then it is used as the SASL
277 hostname.
278 If it evaluates to FALSE, then the value is determined by
280 calling "peerhost" on the socket. In older versions of
281 Net::LDAP this was the standard behaviour, but it turned out to
282 cause more trouble than it fixed.
283 When the option is not given, the SASL host name used defaults
285 to the host name / IP address taken from the "HOST" parameter
286 when connecting.
287 Example
289 $mesg = $ldap->bind; # Anonymous bind
291 $mesg = $ldap->bind( $dn, password => $password );
293 # $sasl is an object of class Authen::SASL
295 $mesg = $ldap->bind( $dn, sasl => $sasl, version => 3 );
296 compare ( DN, OPTIONS )
298 Compare values in an attribute in the entry given by "DN" on the
299 server. "DN" may be a string or a Net::LDAP::Entry object.
300 attr => ATTR
302 The name of the attribute to compare.
303 value => VALUE
305 The value to compare with.
306 control => CONTROL
308 control => [ CONTROL, ... ]
309 See "CONTROLS" below.
310 callback => CALLBACK
312 See "CALLBACKS" below.
313 Example
315 $mesg = $ldap->compare( $dn,
317 attr => 'cn',
318 value => 'Graham Barr'
319 );
320 delete ( DN, OPTIONS )
322 Delete the entry given by "DN" from the server. "DN" may be a
323 string or a Net::LDAP::Entry object.
324 control => CONTROL
326 control => [ CONTROL, ... ]
327 See "CONTROLS" below.
328 callback => CALLBACK
330 See "CALLBACKS" below.
331 Example
333 $mesg = $ldap->delete( $dn );
335 moddn ( DN, OPTIONS )
337 Rename the entry given by "DN" on the server. "DN" may be a string
338 or a Net::LDAP::Entry object.
339 newrdn => RDN
341 This value should be a new RDN to assign to "DN".
342 deleteoldrdn => 1
344 This option should be passed if the existing RDN is to be
345 deleted.
346 newsuperior => NEWDN
348 If given this value should be the DN of the new superior for
349 "DN".
350 control => CONTROL
352 control => [ CONTROL, ... ]
353 See "CONTROLS" below.
354 callback => CALLBACK
356 See "CALLBACKS" below.
357 Example
359 $mesg = $ldap->moddn( $dn, newrdn => 'cn=Graham Barr' );
361 modify ( DN, OPTIONS )
363 Modify the contents of the entry given by "DN" on the server. "DN"
364 may be a string or a Net::LDAP::Entry object.
365 add => { ATTR => VALUE, ... }
367 Add more attributes or values to the entry. "VALUE" should be a
368 string if only a single value is wanted in the attribute, or a
369 reference to an array of strings if multiple values are wanted.
370 $mesg = $ldap->modify( $dn,
372 add => {
373 description => 'List of members', # Add description attribute
374 member => [
375 'cn=member1,ou=people,dc=example,dc=com', # Add to attribute
376 'cn=member2,ou=people,dc=example,dc=com',
377 ]
378 }
379 );
380 delete => [ ATTR, ... ]
382 Delete complete attributes from the entry.
383 $mesg = $ldap->modify( $dn,
385 delete => ['member','description'] # Delete attributes
386 );
387 delete => { ATTR => VALUE, ... }
389 Delete individual values from an attribute. "VALUE" should be a
390 string if only a single value is being deleted from the
391 attribute, or a reference to an array of strings if multiple
392 values are being deleted.
393 If "VALUE" is a reference to an empty array or all existing
395 values of the attribute are being deleted, then the attribute
396 will be deleted from the entry.
397 $mesg = $ldap->modify( $dn,
399 delete => {
400 description => 'List of members',
401 member => [
402 'cn=member1,ou=people,dc=example,dc=com', # Remove members
403 'cn=member2,ou=people,dc=example,dc=com',
404 ],
405 seeAlso => [], # Remove attribute
406 }
407 );
408 replace => { ATTR => VALUE, ... }
410 Replace any existing values in each given attribute with
411 "VALUE". "VALUE" should be a string if only a single value is
412 wanted in the attribute, or a reference to an array of strings
413 if multiple values are wanted. A reference to an empty array
414 will remove the entire attribute. If the attribute does not
415 already exist in the entry, it will be created.
416 $mesg = $ldap->modify( $dn,
418 replace => {
419 description => 'New List of members', # Change the description
420 member => [ # Replace whole list with these
421 'cn=member1,ou=people,dc=example,dc=com',
422 'cn=member2,ou=people,dc=example,dc=com',
423 ],
424 seeAlso => [], # Remove attribute
425 }
426 );
427 increment => { ATTR => VALUE, ... }
429 Atomically increment the existing value in each given attribute
430 by the provided "VALUE". The attributes need to have integer
431 syntax, or be otherwise "incrementable". Note this will only
432 work if the server advertises support for
433 LDAP_FEATURE_MODIFY_INCREMENT. Use "supported_feature" in
434 Net::LDAP::RootDSE to check this.
435 $mesg = $ldap->modify( $dn,
437 increment => {
438 uidNumber => 1 # increment uidNumber by 1
439 }
440 );
441 changes => [ OP => [ ATTR => VALUE ], ... ]
443 This is an alternative to add, delete, replace and increment
444 where the whole operation can be given in a single argument.
445 "OP" should be add, delete, replace or increment. "VALUE"
446 should be either a string or a reference to an array of
447 strings, as before.
448 Use this form if you want to control the order in which the
450 operations will be performed.
451 $mesg = $ldap->modify( $dn,
453 changes => [
454 add => [
455 description => 'A description',
456 member => $newMember,
457 ],
458 delete => [
459 seeAlso => [],
460 ],
461 add => [
462 anotherAttribute => $value,
463 ],
464 ]
465 );
466 control => CONTROL
468 control => [ CONTROL, ... ]
469 See "CONTROLS" below.
470 callback => CALLBACK
472 See "CALLBACKS" below.
473 Example
475 $mesg = $ldap->modify( $dn, add => { sn => 'Barr' } );
477 $mesg = $ldap->modify( $dn, delete => [qw(faxNumber)] );
479 $mesg = $ldap->modify( $dn, delete => { 'telephoneNumber' => '911' } );
481 $mesg = $ldap->modify( $dn, replace => { 'mail' => 'gbarr@pobox.com' } );
483 $mesg = $ldap->modify( $dn,
485 changes => [
486 # add sn=Barr
487 add => [ sn => 'Barr' ],
488 # delete all fax numbers
489 delete => [ faxNumber => []],
490 # delete phone number 911
491 delete => [ telephoneNumber => ['911']],
492 # change email address
493 replace => [ mail => 'gbarr@pobox.com']
494 ]
495 );
496 search ( OPTIONS )
498 Search the directory using a given filter. This can be used to
499 read attributes from a single entry, from entries immediately below
500 a particular entry, or a whole subtree of entries.
501 The result is an object of class Net::LDAP::Search.
503 base => DN
505 The DN that is the base object entry relative to which the
506 search is to be performed.
507 scope => 'base' | 'one' | 'sub' | 'subtree' | 'children'
509 By default the search is performed on the whole tree below the
510 specified base object. This maybe changed by specifying a
511 "scope" parameter with one of the following values:
512 base
514 Search only the base object.
515 one Search the entries immediately below the base object.
517 sub
519 subtree
520 Search the whole tree below (and including) the base
521 object. This is the default.
522 children
524 Search the whole subtree below the base object, excluding
525 the base object itself.
526 Note: children scope requires LDAPv3 subordinate feature
528 extension.
529 deref => 'never' | 'search' | 'find' | 'always'
531 By default aliases are dereferenced to locate the base object
532 for the search, but not when searching subordinates of the base
533 object. This may be changed by specifying a "deref" parameter
534 with one of the following values:
535 never
537 Do not dereference aliases in searching or in locating the
538 base object of the search.
539 search
541 Dereference aliases in subordinates of the base object in
542 searching, but not in locating the base object of the
543 search.
544 find
546 Dereference aliases in locating the base object of the
547 search, but not when searching subordinates of the base
548 object. This is the default.
549 always
551 Dereference aliases both in searching and in locating the
552 base object of the search.
553 sizelimit => N
555 A sizelimit that restricts the maximum number of entries to be
556 returned as a result of the search. A value of 0, and the
557 default, means that no restriction is requested. Servers may
558 enforce a maximum number of entries to return.
559 timelimit => N
561 A timelimit that restricts the maximum time (in seconds)
562 allowed for a search. A value of 0 (the default), means that no
563 timelimit will be requested.
564 typesonly => 1
566 Only attribute types (no values) should be returned. Normally
567 attribute types and values are returned.
568 filter => FILTER
570 A filter that defines the conditions an entry in the directory
571 must meet in order for it to be returned by the search. This
572 may be a string or a Net::LDAP::Filter object. Values inside
573 filters may need to be escaped to avoid security problems; see
574 Net::LDAP::Filter for a definition of the filter format,
575 including the escaping rules.
576 attrs => [ ATTR, ... ]
578 A list of attributes to be returned for each entry that matches
579 the search filter.
580 If not specified, then the server will return the attributes
582 that are specified as accessible by default given your bind
583 credentials.
584 Certain additional attributes such as "createTimestamp" and
586 other operational attributes may also be available for the
587 asking:
588 $mesg = $ldap->search( ... ,
590 attrs => ['createTimestamp']
591 );
592 To retrieve the default attributes and additional ones, use
594 '*'.
595 $mesg = $ldap->search( ... ,
597 attrs => ['*', 'createTimestamp']
598 );
599 To retrieve no attributes (the server only returns the DNs of
601 matching entries), use '1.1':
602 $mesg = $ldap->search( ... ,
604 attrs => ['1.1']
605 );
606 control => CONTROL
608 control => [ CONTROL, ... ]
609 See "CONTROLS" below.
610 callback => CALLBACK
612 See "CALLBACKS" below.
613 raw => REGEX
615 Use REGEX to denote the names of attributes that are to be
616 considered binary in search results.
617 When this option is given, Net::LDAP converts all values of
619 attributes not matching this REGEX into Perl UTF-8 strings so
620 that the regular Perl operators (pattern matching, ...) can
621 operate as one expects even on strings with international
622 characters.
623 If this option is not given, attribute values are treated as
625 byte strings.
626 The value provided here overwrites the value inherited from the
628 constructor.
629 Example: raw => qr/(?i:^jpegPhoto|;binary)/
631 Example
633 $mesg = $ldap->search(
635 base => $base_dn,
636 scope => 'sub',
637 filter => '(|(objectclass=rfc822mailgroup)(sn=jones))'
638 );
639 Net::LDAP::LDIF->new( \*STDOUT,"w" )->write( $mesg->entries );
641 start_tls ( OPTIONS )
643 Calling this method will convert the existing connection to using
644 Transport Layer Security (TLS), which provides an encrypted
645 connection. This is only possible if the connection uses LDAPv3,
646 and requires that the server advertises support for
647 LDAP_EXTENSION_START_TLS. Use "supported_extension" in
648 Net::LDAP::RootDSE to check this.
649 verify => 'none' | 'optional' | 'require'
651 How to verify the server's certificate:
652 none
654 The server may provide a certificate but it will not be
655 checked - this may mean you are be connected to the wrong
656 server
657 optional
659 Verify only when the server offers a certificate
660 require
662 The server must provide a certificate, and it must be
663 valid.
664 If you set verify to optional or require, you must also set
666 either cafile or capath. The most secure option is require.
667 sslversion => 'sslv2' | 'sslv3' | 'sslv23' | 'tlsv1' | 'tlsv1_1' |
669 'tlsv1_2'
670 This defines the version of the SSL/TLS protocol to use.
671 Default is to use the value that IO::Socket::SSL uses as
672 default.
673 See "SSL_version" in IO::Socket::SSL for more details.
675 sslserver => SSLHOST
677 Allow changing the server name to use in certificate hostname
678 verification in case the target hostname does not match the
679 LDAP server's certificate. If not given it defaults to the
680 name of the HOST connected to.
681 See "SSL_verifycn_name" in IO::Socket::SSL for more details.
683 ciphers => CIPHERS
685 Specify which subset of cipher suites are permissible for this
686 connection, using the standard OpenSSL string format. The
687 default behavior is to keep the decision on the underlying
688 cryptographic library.
689 clientcert => '/path/to/cert.pem'
691 clientkey => '/path/to/key.pem'
692 keydecrypt => sub { ... }
693 If you want to use the client to offer a certificate to the
694 server for SSL authentication (which is not the same as for the
695 LDAP Bind operation) then set clientcert to the user's
696 certificate file, and clientkey to the user's private key file.
697 These files must be in PEM format.
698 If the private key is encrypted (highly recommended) then
700 keydecrypt should be a subroutine that returns the decrypting
701 key. For example:
702 $ldap = Net::LDAP->new( 'myhost.example.com', version => 3 );
704 $mesg = $ldap->start_tls(
705 verify => 'require',
706 clientcert => 'mycert.pem',
707 clientkey => 'mykey.pem',
708 keydecrypt => sub { 'secret'; },
709 capath => '/usr/local/cacerts/'
710 );
711 capath => '/path/to/servercerts/'
713 cafile => '/path/to/servercert.pem'
714 When verifying the server's certificate, either set capath to
715 the pathname of the directory containing CA certificates, or
716 set cafile to the filename containing the certificate of the CA
717 who signed the server's certificate. These certificates must
718 all be in PEM format.
719 The directory in 'capath' must contain certificates named using
721 the hash value of the certificates' subject names. To generate
722 these names, use OpenSSL like this in Unix:
723 ln -s cacert.pem `openssl x509 -hash -noout < cacert.pem`.0
725 (assuming that the certificate of the CA is in cacert.pem.)
727 checkcrl => 1
729 If capath has been configured, then it will also be searched
730 for certificate revocation lists (CRLs) when verifying the
731 server's certificate. The CRLs' names must follow the form
732 hash.rnum where hash is the hash over the issuer's DN and num
733 is a number starting with 0.
734 See "SSL_check_crl" in IO::Socket::SSL for further information.
736 unbind ( )
738 The unbind method does not take any parameters and will unbind you
739 from the server. Some servers may allow you to re-bind or perform
740 other operations after unbinding. If you wish to switch to another
741 set of credentials while continuing to use the same connection, re-
742 binding with another DN and password, without unbind-ing, will
743 generally work.
744 Example
746 $mesg = $ldap->unbind;
748 done ( )
750 Convenience alias for "unbind()", named after the clean-up method
751 of Net::LDAP::LDIF.
752 The following methods are for convenience, and do not return
754 "Net::LDAP::Message" objects.
755 async ( VALUE )
757 If "VALUE" is given the async mode will be set. The previous value
758 will be returned. The value is true if LDAP operations are being
759 performed asynchronously.
760 certificate ( )
762 Returns an X509_Certificate object containing the server's
763 certificate. See the IO::Socket::SSL documentation for information
764 about this class.
765 For example, to get the subject name (in a peculiar OpenSSL-
767 specific format, different from RFC 1779 and RFC 4514) from the
768 server's certificate, do this:
769 print "Subject DN: " . $ldaps->certificate->subject_name . "\n";
771 cipher ( )
773 Returns the cipher mode being used by the connection, in the string
774 format used by OpenSSL.
775 debug ( VALUE )
777 If "VALUE" is given the debug bit-value will be set. The previous
778 value will be returned. Debug output will be sent to "STDERR". The
779 bits of this value are:
780 1 Show outgoing packets (using asn_hexdump).
782 2 Show incoming packets (using asn_hexdump).
783 4 Show outgoing packets (using asn_dump).
784 8 Show incoming packets (using asn_dump).
785 The default value is 0.
787 disconnect ( )
789 Disconnect from the server
790 root_dse ( OPTIONS )
792 The root_dse method retrieves cached information from the server's
793 rootDSE.
794 attrs => [ ATTR, ... ]
796 A reference to a list of attributes to be returned. If not
797 specified, then the following attributes will be requested
798 subschemaSubentry
800 namingContexts
801 altServer
802 supportedExtension
803 supportedFeatures
804 supportedControl
805 supportedSASLMechanisms
806 supportedLDAPVersion
807 The result is an object of class Net::LDAP::RootDSE.
809 Example
811 my $root = $ldap->root_dse;
813 # get naming Context
814 $root->get_value( 'namingContexts', asref => 1 );
815 # get supported LDAP versions
816 $root->supported_version;
817 As the root DSE may change in certain circumstances - for instance
819 when you change the connection using start_tls - you should always
820 use the root_dse method to return the most up-to-date copy of the
821 root DSE.
822 schema ( OPTIONS )
824 Read schema information from the server.
825 The result is an object of class Net::LDAP::Schema. Read this
827 documentation for further information about methods that can be
828 performed with this object.
829 dn => DN
831 If a DN is supplied, it will become the base object entry from
832 which the search for schema information will be conducted. If
833 no DN is supplied the base object entry will be determined from
834 the rootDSE entry.
835 Example
837 my $schema = $ldap->schema;
839 # get objectClasses
840 @ocs = $schema->all_objectclasses;
841 # Get the attributes
842 @atts = $schema->all_attributes;
843 sasl ( )
845 Returns the "Authen::SASL" object associated with the LDAP object,
846 or "undef" if there isn't.
847 socket ( OPTIONS )
849 Returns the underlying socket object being used.
850 The exact object type returned depends on whether SASL layers are
852 established. Without SASL layers the result is always an
853 "IO::Socket" object; with SASL layers the outcome depends on the
854 options given:
855 sasl_layer => FLAG
857 This option is only relevant if SASL layers are established.
858 If it it missing or if is set to a TRUE value, then the SASL
860 layer handle is returned. Depending on the SASL library used,
861 the object returned is not necessarily an "IO::Socket" object.
862 If it exists, but is set to a value evaluating to FALSE, then
864 the base "IO::Socket" object underneath the SASL layer is
865 returned.
866 host ( )
868 Returns the host to which the connection was established. For
869 LDAPI connections the socket path is returned.
870 port ( )
872 Returns the port connected to or "undef" in case of LDAPI
873 connections.
874 uri ( )
876 Returns the URI connected to.
877 As the value returned is that element of the constructor's HOST
879 argument with which the connection was established this may or may
880 not be a legal URI.
881 scheme ( )
883 Returns the scheme of the connection. One of ldap, ldaps or ldapi.
884 sync ( MESG )
886 Wait for a given "MESG" request to be completed by the server. If
887 no "MESG" is given, then wait for all outstanding requests to be
888 completed.
889 Returns an error code defined in Net::LDAP::Constant.
891 process ( MESG )
893 Process any messages that the server has sent, but do not block. If
894 "MESG" is specified then return as soon as "MESG" has been
895 processed.
896 Returns an error code defined in Net::LDAP::Constant.
898 version ( )
900 Returns the version of the LDAP protocol that is being used.
901
903 Many of the methods described above accept a control option. This
904 allows the user to pass controls to the server as described in LDAPv3.
905 A control is a reference to a HASH and should contain the three
907 elements below. If any of the controls are blessed then the method
908 "to_asn" will be called which should return a reference to a HASH
909 containing the three elements described below.
910 For most purposes Net::LDAP::Control objects are the easiest way to
912 generate controls.
913 type => OID
915 This element must be present and is the name of the type of control
916 being requested.
917 critical => FLAG
919 critical is optional and should be a Boolean value, if it is not
920 specified then it is assumed to be false.
921 value => VALUE
923 If the control being requested requires a value then this element
924 should hold the value for the server.
925
927 Most of the above commands accept a callback option. This option should
928 be a reference to a subroutine. This subroutine will be called for each
929 packet received from the server as a response to the request sent.
930 When the subroutine is called the first argument will be the
932 Net::LDAP::Message object which was returned from the method.
933 If the request is a search then multiple packets can be received from
935 the server. Each entry is received as a separate packet. For each of
936 these the subroutine will be called with a Net::LDAP::Entry object as
937 the second argument.
938 During a search the server may also send a list of references. When
940 such a list is received then the subroutine will be called with a
941 Net::LDAP::Reference object as the second argument.
942
944 Net::LDAP also exports constants for the error codes that can be
945 received from the server, see Net::LDAP::Constant.
946
948 Net::LDAP::Constant, Net::LDAP::Control, Net::LDAP::Entry,
949 Net::LDAP::Filter, Net::LDAP::Message, Net::LDAP::Reference,
950 Net::LDAP::Search, Net::LDAP::RFC
951 The homepage for the perl-ldap modules can be found at
953 http://ldap.perl.org/.
954
956 This document is based on a document originally written by Russell
957 Fulton <r.fulton@auckland.ac.nz>.
958 Chris Ridd <chris.ridd@isode.com> for the many hours spent testing and
960 contribution of the ldap* command line utilities.
961
963 A discussion mailing list is hosted by the Perl Foundation at
964 <perl-ldap@perl.org> No subscription is necessary!
965
967 We hope you do not find any, but if you do please report them to the
968 mailing list.
969 If you have a patch, please send it as an attachment to the mailing
971 list.
972
974 Graham Barr <gbarr@pobox.com>
975
977 Copyright (c) 1997-2004 Graham Barr. All rights reserved. This program
978 is free software; you can redistribute it and/or modify it under the
979 same terms as Perl itself.
980perl v5.36.0 2022-07-22 Net::LDAP(3)