ldap_search_ext --Asynchronously Search the Directory Using Controls.

Syntax #include <ldap.h> int ldap_search_ext( LDAP *ld, char *base, int scope, char *filter, char *attrs[], int attrsonly, LDAPControl **serverctrls, LDAPControl **clientctrls, struct timeval *timeout, int sizelimit, int *msgidp) Threadsafe: Yes

The ldap_search_ext() routine initiates an asynchronous search operation.

Authorities and Locks

No OS/400 authority is required. All authority checking is done by the LDAP server.

Parameters

ld

(Input) Specifies the LDAP pointer returned by a previous call to ldap_init(),ldap_ssl_init(), or ldap_open().

base

(Input) Specifies the DN of the entry at which to start the search.

scope

(Input) Specifies the scope of the search. It can be LDAP_SCOPE_BASE (to search the object itself), or LDAP_SCOPE_ONELEVEL (to search the object's immediate children), or LDAP_SCOPE_SUBTREE (to search the object and all its descendents).

filter

(Input) Specifies a string representation of the filter to apply in the search. Simple filters can be specified as attributetype=attributevalue. More complex filters are specified using a prefix notation according to the following BNF:

      <filter>     ::= '(' <filtercomp> ')'
      <filtercomp> ::= <and> | <or> | <not> | <simple>
      <and>        ::= '&' <filterlist>
      <or>         ::= '|' <filterlist>
      <not>        ::= '!' <filter>
      <filterlist> ::= <filter> | <filter> <filterlist>
      <simple>     ::= <attributetype> <filtertype> <attributevalue>
      <filtertype> ::= '=' | '~=' | '<=' | '>='

The '~=' construct is used to specify approximate matching. The representation for <attributetype> and <attributevalue> are as described in "RFC 1778, The String Representation of Standard Attribute Syntaxes". In addition, <attributevalue> can be a single * to achieve an attribute existence test, or can contain text and *'s interspersed to achieve substring matching.

For example, the filter "mail=*" will find any entries that have a mail attribute. The filter "mail=*@student.of.life.edu" will find any entries that have a mail attribute ending in the specified string. To put parentheses in a filter, escape them with a backslash '\\' character. See "RFC 2254, A String Representation of LDAP Search Filters" for a more complete description of allowable filters.

attrs

(Input) Specifies a null-terminated array of character string attribute types to return from entries that match filter. If NULL is specified, all attributes will be returned.

attrsonly

(Input) Specifies attribute information. Attrsonly should be set to 1 to request attribute types only. Set to 0 to request both attributes types and attribute values.

serverctrls

(Input) Specifies a list of LDAP server controls. This parameter may be set to null. See LDAP Controls for more information about server controls.

clientctrls

(Input) Specifies a list of LDAP client controls. This parameter may be set to null. See LDAP Controls for more information about client controls.

sizelimit

(Input) Specifies the maximum number of entries to return. Note that the server may set a lower limit which is enforced at the server.

timeout

(Input) This specifies the local search timeout value. For the ldap_search_ext() and ldap_search_ext_s() APIs, this function specifies both the local search timeout value and the operation time limit that is sent to the server within the search request.

msgidp

(Output) This result parameter is set to the message id of the request if the ldap_search_ext() call succeeds.

Return Value

Message ID of the Operation Initiated

if the request was successful. A subsequent call to ldap_result(), can be used to obtain the result.

another LDAP error code

if the request was not successful.

Error Conditions

If ldap_search_ext() is not successful, an error code will be returned. See LDAP Client API Error Conditions for possible LDAP error codes.

Error Messages

    The following message may be set from this function.
    CPF3CF2 E  Error(s) occurred during running of ldap_search_ext API.

Related Information

    ldap_search_s() -- Synchronously search the directory.
    ldap_search() -- Asynchronously search the directory.
    ldap_search_ext_s() -- Synchronously search the directory with controls.
    ldap_search_st() -- Synchronously search the directory  with timeout.

The ldap_search_ext() API supports LDAP V3 server controls, client controls, and allow varying size and time limits to be easily specified for each search operation.