Add ldap_back_attribute to ldap backend

servers/slapd/back-ldap/Makefile.in

 # $OpenLDAP$
 
 SRCS	= init.c config.c search.c bind.c unbind.c add.c compare.c \
-		delete.c modify.c modrdn.c group.c
+		delete.c modify.c modrdn.c group.c attribute.c
 OBJS	= init.lo config.lo search.lo bind.lo unbind.lo add.lo compare.lo \
-		delete.lo modify.lo modrdn.lo group.lo
+		delete.lo modify.lo modrdn.lo group.lo attribute.lo
 
 LDAP_INCDIR= ../../../include       
 LDAP_LIBDIR= ../../../libraries

servers/slapd/back-ldap/attribute.c

+/* group.c - ldap backend acl group routine */
+/* $OpenLDAP$ */
+/*
+ * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
+ * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/socket.h>
+#include <ac/string.h>
+
+#include "slap.h"
+#include "back-ldap.h"
+
+
+/* return 0 IFF we can retrieve the attributes
+ * of entry with e_ndn
+ */
+int
+ldap_back_attribute(
+	Backend	*be,
+	Connection *conn,
+	Operation *op,
+	Entry	*target,
+	const char	*e_ndn,
+	AttributeDescription *entry_at,
+	const char ***vals
+)
+{
+	struct ldapinfo *li = (struct ldapinfo *) be->be_private;    
+	int rc = 1, i, j;
+	Attribute *attr;
+	struct berval **abv;
+	char *s, **v;
+	LDAPMessage	*result, *e;
+	char *gattr[2];
+	LDAP *ld;
+
+	*vals = NULL;
+	if (target != NULL && strcmp(target->e_ndn, e_ndn) == 0) {
+		/* we already have a copy of the entry */
+		if ((attr = attr_find(target->e_attrs, entry_at)) == NULL)
+			return(1);
+
+		for ( i = 0; attr->a_vals[i] != NULL; i++ ) { }
+		v = (char **) ch_calloc( (i + 1), sizeof(char *) );
+		if (v != NULL) {
+			for ( j = 0, abv = attr->a_vals; --i >= 0; abv++ ) {
+				if ( (*abv)->bv_len > 0 ) {
+					s = ch_malloc( (*abv)->bv_len + 1 );
+					if( s == NULL )
+						break;
+					memcpy(s, (*abv)->bv_val, (*abv)->bv_len);
+					s[(*abv)->bv_len] = 0;
+					v[j++] = s;
+				}
+			}
+			v[j] = NULL;
+			*vals = v;
+			rc = 0;
+		}
+
+	} else {
+		if (ldap_initialize(&ld, li->url) != LDAP_SUCCESS) {
+			return(1);
+		}
+
+		if (ldap_bind_s(ld, li->binddn, li->bindpw, LDAP_AUTH_SIMPLE) == LDAP_SUCCESS) {
+			gattr[0] = entry_at->ad_cname->bv_val;
+			gattr[1] = NULL;
+			if (ldap_search_ext_s(ld, e_ndn, LDAP_SCOPE_BASE, "(objectclass=*)",
+									gattr, 0, NULL, NULL, LDAP_NO_LIMIT,
+									LDAP_NO_LIMIT, &result) == LDAP_SUCCESS)
+			{
+				if ((e = ldap_first_entry(ld, result)) != NULL) {
+					*vals = ldap_get_values(ld, e, entry_at->ad_cname->bv_val);
+					if (*vals != NULL)
+						rc = 0;
+				}
+				ldap_msgfree(result);
+			}
+		}
+		ldap_unbind(ld);
+    }
+
+	return(rc);
+}
+

servers/slapd/back-ldap/external.h

@@ -62,6 +62,13 @@ extern int	ldap_back_group LDAP_P(( BackendDB *bd,
 	ObjectClass* group_oc,
 	AttributeDescription* group_at));
 
+extern int	ldap_back_attribute LDAP_P(( BackendDB *bd,
+	Connection *conn, Operation *op,
+	Entry *target,
+	const char* e_ndn,
+	AttributeDescription* entry_at,
+	const char ***vals));
+
 LDAP_END_DECL
 
 #endif /* _LDAP_EXTERNAL_H */

servers/slapd/back-ldap/init.c

@@ -75,7 +75,7 @@ ldap_back_initialize(
 	bi->bi_extended = 0;
 
 	bi->bi_acl_group = ldap_back_group;
-	bi->bi_acl_attribute = 0;
+	bi->bi_acl_attribute = ldap_back_attribute;
 	bi->bi_chk_referrals = 0;
 
 #ifdef HAVE_CYRUS_SASL