'\" te
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.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
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.TH LDAP_OPEN 3LDAP "Jan 15, 2004"
.SH NAME
ldap_open, ldap_init \- initialize an LDAP session
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [ \fIflag\fR... ] \fIfile\fR... -lldap [ \fIlibrary\fR... ]
#include <lber.h>
#include <ldap.h>

\fBLDAP *\fR\fBldap_open\fR(\fBconst char *\fR\fIhost\fR, \fBint\fR \fIport\fR);
.fi

.LP
.nf
\fBLDAP *\fR\fBldap_init\fR(\fBconst char *\fR\fIhost\fR, \fBint\fR \fIport\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBldap_open()\fR function initializes an LDAP session and also opens a
connection to an LDAP server before it returns to the caller. Unlike
\fBldap_open()\fR, \fBldap_init()\fR does not open a connection to the LDAP
server until an operation, such as a search request, is performed.
.sp
.LP
The \fBldap_open()\fR function is deprecated and should no longer be used. Call
\fBldap_init()\fR instead.
.sp
.LP
A list of LDAP hostnames or an IPv4 or IPv6 address can be specified with the
\fBldap_open()\fR and \fBldap_init()\fR functions. The hostname can include a
port number, separated from the hostname by a colon (\fB:\fR). A port number
included as part of the hostname takes precedence over the \fIport\fR
parameter. The \fBldap_open()\fR and \fBldap_init()\fR functions attempt
connections with LDAP hosts in the order listed and return the first successful
connection.
.SH PARAMETERS
.sp
.LP
These functions support the following parameters.
.sp
.ne 2
.na
\fB\fIhost\fR\fR
.ad
.RS 8n
The hostname, IPv4 or IPv6 address of the host that runs the LDAP server. A
space-separated list of hostnames can also be used for this parameter.
.RE

.sp
.ne 2
.na
\fB\fIport\fR\fR
.ad
.RS 8n
TCP port number of a connection. Supply the constant \fBLDAP_PORT\fR to obtain
the default LDAP port of 389. If a host includes a port number, the default
parameter is ignored.
.RE

.SH RETURN VALUES
.sp
.LP
The \fBldap_open()\fR and \fBldap_init()\fR functions return a handle to an
LDAP session that contains a pointer to an opaque structure. The structure must
be passed to subsequent calls for the session. If a session cannot be
initialized, the functions return \fINULL\fR and \fBerrno\fR should be set
appropriately.
.sp
.LP
Various aspects of this opaque structure can be read or written to control the
session-wide parameters. Use the \fBldap_get_option\fR(3LDAP) to access the
current option values and the \fBldap_set_option\fR(3LDAP) to set values for
these options.
.SH EXAMPLES
.LP
\fBExample 1 \fRSpecifying IPv4 and IPv6 Addresses
.sp
.LP
LDAP sessions can be initialized with hostnames, IPv4 or IPv6 addresses, such
as those shown in the following examples.

.sp
.in +2
.nf
ldap_init("hosta:636 hostb", 389)
ldap_init("192.168.82.110:389", 389)
ldap_init("[fec0::114:a00:20ff:ab3d:83ed]", 389)
.fi
.in -2
.sp

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Evolving
_
MT-Level	Safe
.TE

.SH SEE ALSO
.sp
.LP
.BR errno (3C),
.BR ldap (3LDAP),
.BR ldap_bind (3LDAP),
.BR ldap_get_option (3LDAP),
.BR ldap_set_option (3LDAP),
.BR attributes (7)