2006-10-10 05:17:43 +08:00
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.TH LDAP_GET_OPTION 3 "RELEASEDATE" "OpenLDAP LDVERSION"
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.\" $OpenLDAP$
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2007-01-03 04:00:42 +08:00
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.\" Copyright 1998-2007 The OpenLDAP Foundation All Rights Reserved.
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2006-10-10 05:17:43 +08:00
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.\" Copying restrictions apply. See COPYRIGHT/LICENSE.
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.SH NAME
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ldap_get_option, ldap_set_option \- LDAP option handling routines
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.SH LIBRARY
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OpenLDAP LDAP (libldap, -lldap)
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.SH SYNOPSIS
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.nf
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.B #include <ldap.h>
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.LP
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2006-10-14 08:58:50 +08:00
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.BI "int ldap_get_option(LDAP *" ld ", int " option ", void *" outvalue ");"
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2006-10-10 05:17:43 +08:00
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.LP
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2006-10-14 08:58:50 +08:00
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.BI "int ldap_set_option(LDAP *" ld ", int " option ", const void *" invalue ");"
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2006-10-10 05:17:43 +08:00
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.SH DESCRIPTION
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.LP
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These routines provide access to options stored either in a LDAP handle
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or as global options, where applicable.
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They make use of a neutral interface, where the type of the value
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either retrieved by
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.BR ldap_get_option (3)
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or set by
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.BR ldap_set_option (3)
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2006-10-14 08:58:50 +08:00
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is cast to
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.BR "void *" .
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2006-10-10 05:17:43 +08:00
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The actual type is determined based on the value of the
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.B option
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argument.
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Global options are set/retrieved by passing a NULL LDAP handle.
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.TP
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.B LDAP_OPT_API_INFO
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Fills-in a
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.BR "struct ldapapiinfo" ;
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.BR outvalue
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must be a
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.BR "struct ldapapiinfo *" ,
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pointing to an already allocated struct.
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This is a read-only option.
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.TP
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.B LDAP_OPT_DESC
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Returns the file descriptor associated to the socket buffer
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of the LDAP handle passed in as
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.BR ld ;
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.BR outvalue
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must be a
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.BR "int *" .
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This is a read-only, handler-specific option.
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.TP
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.B LDAP_OPT_SOCKBUF
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Returns a pointer to the socket buffer of the LDAP handle passed in as
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.BR ld ;
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.BR outvalue
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must be a
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.BR "Sockbuf **" .
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This is a read-only, handler-specific option.
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.TP
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.B LDAP_OPT_TIMEOUT
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Sets/gets a timeout value (\fIFIXME: currently unused\fP).
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.BR outvalue
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must be a
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.BR "struct timeval **" ,
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and the resulting pointer must be freed by the caller using
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.BR ldap_memfree (3).
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.BR invalue
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must be a
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.BR "struct timeval *" .
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.TP
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.B LDAP_OPT_NETWORK_TIMEOUT
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Sets/gets the network timeout value after which
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.BR poll (2)/ select (2)
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following a
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.BR connect (2)
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returns in case of no activity.
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.BR outvalue
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must be a
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.BR "struct timeval **" ,
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and the resulting pointer must be freed by the caller using
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.BR ldap_memfree (3).
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.BR invalue
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must be a
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.BR "struct timeval *" .
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.TP
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.B LDAP_OPT_DEREF
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Sets/gets the value that defines when alias deferencing must occur.
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.BR outvalue
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and
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.BR invalue
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must be
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.BR "int *" ,
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and they cannot be NULL.
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.TP
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.B LDAP_OPT_SIZELIMIT
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Sets/gets the value that defines the maximum number of entries
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to be returned by a search operation.
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.BR outvalue
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and
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.BR invalue
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must be
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.BR "int *" ,
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and they cannot be NULL.
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.TP
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.B LDAP_OPT_TIMELIMIT
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Sets/gets the value that defines the time limit after which
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a search operation should be terminated by the server.
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.BR outvalue
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and
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.BR invalue
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must be
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.BR "int *" ,
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and they cannot be NULL.
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.TP
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.B LDAP_OPT_REFERRALS
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Determines whether the library should implicitly chase referrals or not.
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.BR outvalue
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and
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.BR invalue
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must be
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.BR "int *" ;
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their value should either be
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.BR LDAP_OPT_OFF
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or
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.BR LDAP_OPT_ON .
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.TP
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.B LDAP_OPT_RESTART
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Determines whether the library should implicitly restart connections (FIXME).
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.BR outvalue
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and
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.BR invalue
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must be
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.BR "int *" ;
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their value should either be
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.BR LDAP_OPT_OFF
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or
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.BR LDAP_OPT_ON .
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.TP
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.B LDAP_OPT_PROTOCOL_VERSION
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Sets/gets the protocol version.
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.BR outvalue
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and
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.BR invalue
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must be
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.BR "int *" .
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.TP
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.B LDAP_OPT_SERVER_CONTROLS
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Sets/gets the server-side controls to be used for all operations.
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This is now deprecated as modern LDAP C API provides replacements
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for all main operations which accepts server-side controls as
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explicit arguments; see for example
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.BR ldap_search_ext (3),
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.BR ldap_add_ext (3),
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.BR ldap_modify_ext (3)
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and so on.
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.BR outvalue
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must be
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.BR "LDAPControl ***" ,
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and the caller is responsible of freeing the returned controls, if any,
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by calling
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.BR ldap_controls_free (3),
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while
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.BR invalue
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must be
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.BR "LDAPControl **" ;
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the library duplicates the controls passed via
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.BR invalue .
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.TP
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.B LDAP_OPT_CLIENT_CONTROLS
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Sets/gets the client-side controls to be used for all operations.
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This is now deprecated as modern LDAP C API provides replacements
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for all main operations which accepts client-side controls as
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explicit arguments; see for example
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.BR ldap_search_ext (3),
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.BR ldap_add_ext (3),
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.BR ldap_modify_ext (3)
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and so on.
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.BR outvalue
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must be
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.BR "LDAPControl ***" ,
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and the caller is responsible of freeing the returned controls, if any,
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by calling
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.BR ldap_controls_free (3),
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while
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.BR invalue
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must be
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.BR "LDAPControl **" ;
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the library duplicates the controls passed via
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.BR invalue .
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.TP
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.B LDAP_OPT_HOST_NAME
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Sets/gets a space-separated list of hosts to be contacted by the library
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when trying to establish a connection.
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This is now deprecated in favour of
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.BR LDAP_OPT_URI .
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.BR outvalue
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must be a
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.BR "char **" ,
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and the caller is responsible of freeing the resulting string by calling
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.BR ldap_memfree (3),
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while
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.BR invalue
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must be a
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.BR "char *" ;
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the library duplicates the corresponding string.
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.TP
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.B LDAP_OPT_URI
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Sets/gets a space-separated list of URIs to be contacted by the library
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when trying to establish a connection.
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.BR outvalue
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must be a
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.BR "char **" ,
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and the caller is responsible of freeing the resulting string by calling
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.BR ldap_memfree (3),
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while
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.BR invalue
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must be a
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.BR "char *" ;
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the library parses the string into a list of
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.BR LDAPURLDesc
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structures, so the invocation of
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.BR ldap_set_option (3)
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may fail if URL parsing fails.
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.TP
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.B LDAP_OPT_DEFBASE
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Sets/gets a string containing the DN to be used as default base
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for search operations.
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.BR outvalue
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must be a
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.BR "char **" ,
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and the caller is responsible of freeing the returned string by calling
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.BR ldap_memfree (3),
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while
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.BR invalue
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must be a
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.BR "char *" ;
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the library duplicates the corresponding string.
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.TP
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.B LDAP_OPT_RESULT_CODE
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Sets/gets the LDAP result code associated to the handle.
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This option was formerly known as
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.BR LDAP_OPT_ERROR_NUMBER .
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2006-10-10 05:17:43 +08:00
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Both
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.BR outvalue
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and
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.BR invalue
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must be a
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.BR "int *" .
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.TP
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2006-10-15 01:04:17 +08:00
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.B LDAP_OPT_DIAGNOSTIC_MESSAGE
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Sets/gets a string containing the error string associated to the LDAP handle.
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This option was formerly known as
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.BR LDAP_OPT_ERROR_STRING .
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2006-10-10 05:17:43 +08:00
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.BR outvalue
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must be a
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.BR "char **" ,
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and the caller is responsible of freeing the returned string by calling
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.BR ldap_memfree (3),
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while
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.BR invalue
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must be a
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.BR "char *" ;
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the library duplicates the corresponding string.
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.TP
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.B LDAP_OPT_MATCHED_DN
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Sets/gets a string containing the matched DN associated to the LDAP handle.
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.BR outvalue
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must be a
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.BR "char **" ,
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and the caller is responsible of freeing the returned string by calling
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.BR ldap_memfree (3),
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while
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.BR invalue
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must be a
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.BR "char *" ;
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the library duplicates the corresponding string.
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.TP
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.B LDAP_OPT_REFERRAL_URLS
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Sets/gets an array containing the referral URIs associated to the LDAP handle.
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.BR outvalue
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must be a
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.BR "char ***" ,
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and the caller is responsible of freeing the returned string by calling
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.BR ber_memvfree (3),
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while
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.BR invalue
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must be a NULL-terminated
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.BR "char **" ;
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the library duplicates the corresponding string.
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.TP
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.B LDAP_OPT_API_FEATURE_INFO
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Fills-in a
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.BR "LDAPAPIFeatureInfo" ;
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.BR outvalue
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must be a
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.BR "LDAPAPIFeatureInfo *" ,
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pointing to an already allocated struct.
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This is a read-only option.
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.TP
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.B LDAP_OPT_DEBUG_LEVEL
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Sets/gets the debug level of the client library.
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Both
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.BR outvalue
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and
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.BR invalue
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must be a
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.BR "int *" .
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.SH ERRORS
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On success, the functions return
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.BR LDAP_OPT_SUCCESS ,
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while they may return
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.B LDAP_OPT_ERROR
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to indicate a generic option handling error.
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Occasionally, more specific errors can be returned, like
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.B LDAP_NO_MEMORY
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to indicate a failure in memory allocation.
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.SH NOTES
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The LDAP libraries with the
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.B LDAP_OPT_REFERRALS
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option set to
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.B LDAP_OPT_ON
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(default value) automatically follow referrals using an anonymous bind.
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Application developers are encouraged to either implement consistent
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referral chasing features, or explicitly disable referral chasing
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by setting that option to
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.BR LDAP_OPT_OFF .
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.SH SEE ALSO
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.BR ldap (3),
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.BR ldap_error (3),
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.B RFC 4422
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(http://www.rfc-editor.org),
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.SH ACKNOWLEDGEMENTS
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.B OpenLDAP
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is developed and maintained by The OpenLDAP Project (http://www.openldap.org/).
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.B OpenLDAP
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is derived from University of Michigan LDAP 3.3 Release.
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