1/*
2 * Copyright (c) 2001 by Sun Microsystems, Inc.
3 * All rights reserved.
4 */
5
6#pragma ident	"%Z%%M%	%I%	%E% SMI"
7
8/*
9 * The contents of this file are subject to the Netscape Public
10 * License Version 1.1 (the "License"); you may not use this file
11 * except in compliance with the License. You may obtain a copy of
12 * the License at http://www.mozilla.org/NPL/
13 *
14 * Software distributed under the License is distributed on an "AS
15 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
16 * implied. See the License for the specific language governing
17 * rights and limitations under the License.
18 *
19 * The Original Code is Mozilla Communicator client code, released
20 * March 31, 1998.
21 *
22 * The Initial Developer of the Original Code is Netscape
23 * Communications Corporation. Portions created by Netscape are
24 * Copyright (C) 1998-1999 Netscape Communications Corporation. All
25 * Rights Reserved.
26 *
27 * Contributor(s):
28 */
29/*
30 *  Copyright (c) 1990 Regents of the University of Michigan.
31 *  All rights reserved.
32 */
33/*
34 *  getattr.c
35 */
36
37#if 0
38#ifndef lint
39static char copyright[] = "@(#) Copyright (c) 1990 Regents of the University of Michigan.\nAll rights reserved.\n";
40#endif
41#endif
42
43#include "ldap-int.h"
44
45
46static ber_len_t
47bytes_remaining( BerElement *ber )
48{
49	ber_len_t	len;
50
51	if ( ber_get_option( ber, LBER_OPT_REMAINING_BYTES, &len ) != 0 ) {
52		return( 0 );	/* not sure what else to do.... */
53	}
54	return( len );
55}
56
57
58char *
59LDAP_CALL
60ldap_first_attribute( LDAP *ld, LDAPMessage *entry, BerElement **ber )
61{
62	char	*attr;
63	int	err;
64	ber_int_t	seqlength;
65
66	LDAPDebug( LDAP_DEBUG_TRACE, "ldap_first_attribute\n", 0, 0, 0 );
67
68	if ( !NSLDAPI_VALID_LDAP_POINTER( ld )) {
69		return( NULL );		/* punt */
70	}
71
72	if ( ber == NULL || !NSLDAPI_VALID_LDAPMESSAGE_ENTRY_POINTER( entry )) {
73		LDAP_SET_LDERRNO( ld, LDAP_PARAM_ERROR, NULL, NULL );
74		return( NULL );
75	}
76
77	if ( nsldapi_alloc_ber_with_options( ld, ber ) != LDAP_SUCCESS ) {
78		return( NULL );
79	}
80
81	**ber = *entry->lm_ber;
82
83	attr = NULL;			/* pessimistic */
84	err = LDAP_DECODING_ERROR;	/* ditto */
85
86	/*
87	 * Skip past the sequence, dn, and sequence of sequence.
88	 * Reset number of bytes remaining so we confine the rest of our
89	 * decoding to the current sequence.
90	 */
91	if ( ber_scanf( *ber, "{xl{", &seqlength ) != LBER_ERROR &&
92	     ber_set_option( *ber, LBER_OPT_REMAINING_BYTES, &seqlength )
93	    == 0 ) {
94		/* snarf the attribute type, and skip the set of values,
95		 * leaving us positioned right before the next attribute
96		 * type/value sequence.
97		 */
98		if ( ber_scanf( *ber, "{ax}", &attr ) != LBER_ERROR ||
99		    bytes_remaining( *ber ) == 0 ) {
100			err = LDAP_SUCCESS;
101		}
102	}
103
104	LDAP_SET_LDERRNO( ld, err, NULL, NULL );
105	if ( attr == NULL || err != LDAP_SUCCESS ) {
106		ber_free( *ber, 0 );
107		*ber = NULL;
108	}
109	return( attr );
110}
111
112/* ARGSUSED */
113char *
114LDAP_CALL
115ldap_next_attribute( LDAP *ld, LDAPMessage *entry, BerElement *ber )
116{
117	char	*attr;
118	int	err;
119
120	LDAPDebug( LDAP_DEBUG_TRACE, "ldap_next_attribute\n", 0, 0, 0 );
121
122	if ( !NSLDAPI_VALID_LDAP_POINTER( ld )) {
123		return( NULL );		/* punt */
124	}
125
126	if ( ber == NULL || !NSLDAPI_VALID_LDAPMESSAGE_ENTRY_POINTER( entry )) {
127		LDAP_SET_LDERRNO( ld, LDAP_PARAM_ERROR, NULL, NULL );
128		return( NULL );
129	}
130
131	attr = NULL;			/* pessimistic */
132	err = LDAP_DECODING_ERROR;	/* ditto */
133
134	/* skip sequence, snarf attribute type, skip values */
135	if ( ber_scanf( ber, "{ax}", &attr ) != LBER_ERROR ||
136	    bytes_remaining( ber ) == 0 ) {
137		err = LDAP_SUCCESS;
138	}
139
140	LDAP_SET_LDERRNO( ld, err, NULL, NULL );
141	return( attr );
142}
143