int ldap_unbind(LDAP *ld);int ldap_unbind_s(LDAP *ld);
DESCRIPTION
These routines provide various interfaces to the LDAP bind operation.
After an association with an LDAP server is made using
ldap_init(3),
an LDAP bind operation should be performed before other operations are
attempted over the connection. An LDAP bind is required when using
Version 2 of the LDAP protocol; it is optional for Version 3 but is
usually needed due to security considerations.
There are three types of bind calls, ones providing simple authentication,
ones providing SASL authentication, and general routines capable of doing
either simple or SASL authentication.
SASL
(Simple Authentication and Security Layer)
that can negotiate one of many different kinds of authentication.
Both synchronous and asynchronous versions of each variant of the bind
call are provided. All routines
take ld as their first parameter, as returned from
ldap_init(3).
SIMPLE AUTHENTICATION
The simplest form of the bind call is
ldap_simple_bind_s().
It takes the DN to bind as in who, and the userPassword associated
with the entry in passwd. It returns an LDAP error indication
(see
ldap_error(3)).
The
ldap_simple_bind()
call is asynchronous,
taking the same parameters but only initiating the bind operation and
returning the message id of the request it sent. The result of the
operation can be obtained by a subsequent call to
ldap_result(3).
GENERAL AUTHENTICATION
The
ldap_bind()
and
ldap_bind_s()
routines can be used when the
authentication method to use needs to be selected at runtime. They
both take an extra method parameter selecting the authentication
method to use. It should be set to LDAP_AUTH_SIMPLE
to select simple authentication.
ldap_bind()
returns the message id of the request it initiates.
ldap_bind_s()
returns an LDAP error indication.
SASL AUTHENTICATION
Description still under construction...
UNBINDING
The
ldap_unbind()
call is used to unbind from the directory,
terminate the current association, and free the resources contained
in the ld structure. Once it is called, the connection to
the LDAP server is closed, and the ld structure is invalid.
The
ldap_unbind_s()
call is just another name for
ldap_unbind();
both of these calls are synchronous in nature.
ERRORS
Asynchronous routines will return -1 in case of error, setting the
ld_errno parameter of the ld structure. Synchronous
routines return whatever ld_errno is set to. See
ldap_error(3)
for more information.
OpenLDAP
is developed and maintained by The OpenLDAP Project (http://www.openldap.org/).OpenLDAP
is derived from University of Michigan LDAP 3.3 Release.