.TH LDAP_URL 3 "23 July 2001" "OpenLDAP LDVERSION"
.\" $OpenLDAP$
.\" Copyright 1998-2000 The OpenLDAP Foundation All Rights Reserved.
.\" Copying restrictions apply.  See COPYRIGHT/LICENSE.
.SH NAME
ldap_is_ldap_url,
ldap_url_parse,
ldap_free_urldesc,
ldap_url_search,
ldap_url_search_s,
ldap_url_search_st \- LDAP Uniform Resource Locator routines
.SH SYNOPSIS
.nf
.ft B
#include <ldap.h>
.ft
.LP
.ft B
int ldap_is_ldap_url( const char *url )
.LP
.ft B
int ldap_url_parse( const char *url, LDAPURLDesc **ludpp )
.LP
typedef struct ldap_url_desc {
    char *      lud_scheme;     /* URI scheme */
    char        lud_host;       /* LDAP host to contact */
    int         lud_port;       /* port on host */
    char *      lud_dn;         /* base for search */
    char **     lud_attrs;      /* list of attributes */
    int         lud_scope;      /* a LDAP_SCOPE_... value */
    char *      lud_filter;     /* LDAP search filter */
    char **     lud_exts;       /* LDAP extensions */
    int         lud_crit_exts;  /* true if any extension is critical */
    /* may contain additional fields for internal use */
} LDAPURLDesc;
.LP
.ft B
ldap_free_urldesc( LDAPURLDesc *ludp )
.LP
.ft B
int ldap_url_search( ld, url, attrsonly )
.ft
LDAP            *ld;
char            *url;
int             attrsonly;
.LP
.ft B
int ldap_url_search_s( ld, url, attrsonly, res )
.ft
LDAP            *ld;
char            *url;
int             attrsonly;
LDAPMessage     **res;
.LP
.ft B
int ldap_url_search_st( ld, url, attrsonly, timeout, res )
.ft
LDAP            *ld;
char            *url;
int             attrsonly;
struct timeval  *timeout;
LDAPMessage     **res;
.SH DESCRIPTION
These routines support the use of LDAP URLs (Uniform Resource Locators)
as detailed in RFC 2255.  LDAP URLs look like this:
.nf

  \fBldap://\fP\fIhostport\fP\fB/\fP\fIdn\fP[\fB?\fP\fIattrs\fP[\fB?\fP\fIscope\fP[\fB?\fP\fIfilter\fP[\fB?\fP\fIexts\fP]]]]

where:
  \fIhostport\fP is a host name with an optional ":portnumber"
  \fIdn\fP is the search base
  \fIattrs\fP is a comma separated list of attributes to request
  \fIscope\fP is one of these three strings:
    base one sub (default=base)
  \fIfilter\fP is filter
  \fIexts\fP are recognized set of LDAP and/or API extensions.

Example:
  ldap://ldap.example.net/dc=example,dc=net?cn,sn?sub?(cn=*)

.fi
.LP
URLs that are wrapped in angle-brackets and/or preceded by "URL:" are also
tolerated.  Alternative schemes such as ldaps:// and ldapi:// may be
parsed using the below routines as well.
.LP
.B ldap_is_ldap_url()
returns a non-zero value if \fIurl\fP looks like an LDAP URL (as
opposed to some other kind of URL).  It can be used as a quick check
for an LDAP URL; the
.B ldap_url_parse()
routine should be used if a more thorough check is needed.
.LP
.B ldap_url_parse()
breaks down an LDAP URL passed in \fIurl\fP into its component pieces.
If successful, zero is returned, an LDAP URL description is
allocated, filled in, and \fIludpp\fP is set to point to it.  If an
error occurs, a non-zero URL error code is returned.
.LP
.B ldap_free_urldesc()
should be called to free an LDAP URL description that was obtained from
a call to
.B ldap_url_parse().
.LP
.B ldap_url_search()
initiates an asynchronous LDAP search based on the contents of the
\fIurl\fP string.  This routine acts just like
.BR ldap_search (3)
except that many search parameters are pulled out of the URL.
.LP
.B ldap_url_search_s()
performs a synchronous LDAP search based on the contents of the
\fIurl\fP string.  This routine acts just like
.BR ldap_search_s (3)
except that many search parameters are pulled out of the URL.
.LP
.B ldap_url_search_st()
performs a synchronous LDAP URL search with a specified \fItimeout\fP.
This routine acts just like
.BR ldap_search_st (3)
except that many search parameters are pulled out of the URL.
.SH SEE ALSO
.BR ldap (3),
.BR ldap_search (3)
.LP
.B The LDAP URL Format, RFC 2255,
Tim Howes and Mark Smith, December 1997.
.SH ACKNOWLEDGEMENTS
.B OpenLDAP
is developed and maintained by The OpenLDAP Project (http://www.openldap.org/).
.B OpenLDAP
is derived from University of Michigan LDAP 3.3 Release.