ldap_connect function

The ldap_connect function establishes a connection with the server.


  LDAP      *ld,
  l_timeval *timeout



The session handle obtained from ldap_init.


A pointer to an LDAP_TIMEVAL structure that specifies the number of seconds to spend in an attempt to establish a connection before a timeout. If NULL, the function uses a default timeout value.

Return Value

If the function succeeds, LDAP_SUCCESS is returned.

If the function fails, an error code is returned. For more information, see Return Values.


Although it is not required that a client call ldap_connect to establish a connection to the server, it is good programming practice to do so. If the connection does not exist, other functions, for example, ldap_bind_s, perform the call internally. However, if you have to troubleshoot this part of your application, establishing the connection prior to making the call to some other function, for example ldap_bind_s, will also separate the possible problems if the connection fails. Alternately, you can specify additional options on the connection block. For example, a client can call ldap_init to initialize a session, then call ldap_connect, with a non-NULL timeout parameter value, to connect to the server with a specified time-out.

If the call to ldap_connect succeeds, the client is connected to the LDAP server as an anonymous user. The session handle should be freed with a call to ldap_unbind when it is no longer required.

If the ldap_connect call fails, the session handle should be freed with a call to ldap_unbind when no longer required for error recovery.


Minimum supported client Windows Vista
Minimum supported server Windows Server 2008
Target Platform Windows
Header winldap.h
Library Wldap32.lib
DLL Wldap32.dll

See Also

Establishing an LDAP Session



Return Values