From 84bb488ec2e718db050748cf78c93e34bb2f2be2 Mon Sep 17 00:00:00 2001
From: Pierangelo Masarati <ando@openldap.org>
Date: Sun, 27 Nov 2005 23:17:57 +0000
Subject: [PATCH] allow to register (and expose) a supported feature

---
 servers/slapd/main.c       |  2 +
 servers/slapd/proto-slap.h |  3 ++
 servers/slapd/root_dse.c   | 82 +++++++++++++++++++++++++++++++++++---
 3 files changed, 82 insertions(+), 5 deletions(-)

diff --git a/servers/slapd/main.c b/servers/slapd/main.c
index c47f477893..3f5e91adf5 100644
--- a/servers/slapd/main.c
+++ b/servers/slapd/main.c
@@ -813,6 +813,8 @@ destroy:
 
 	extops_kill();
 
+	supported_feature_destroy();
+
 stop:
 #ifdef HAVE_NT_EVENT_LOG
 	if (is_NT_Service)
diff --git a/servers/slapd/proto-slap.h b/servers/slapd/proto-slap.h
index 6727669d99..6f41c2f0b1 100644
--- a/servers/slapd/proto-slap.h
+++ b/servers/slapd/proto-slap.h
@@ -1362,6 +1362,9 @@ LDAP_SLAPD_F (int) slap_discover_feature LDAP_P((
 	const char	*attr,
 	const char	*val ));
 
+LDAP_SLAPD_F (int) supported_feature_load LDAP_P(( struct berval *f ));
+LDAP_SLAPD_F (int) supported_feature_destroy LDAP_P(( void ));
+
 /*
  * sasl.c
  */
diff --git a/servers/slapd/root_dse.c b/servers/slapd/root_dse.c
index 810c5316c0..a166feea9c 100644
--- a/servers/slapd/root_dse.c
+++ b/servers/slapd/root_dse.c
@@ -28,21 +28,89 @@
 #include "slapi/slapi.h"
 #endif
 
-static struct berval supportedFeatures[] = {
+static struct berval	builtin_supportedFeatures[] = {
 	BER_BVC(LDAP_FEATURE_MODIFY_INCREMENT),		/* Modify/increment */
-	BER_BVC(LDAP_FEATURE_ALL_OP_ATTRS),			/* All Op Attrs (+) */
+	BER_BVC(LDAP_FEATURE_ALL_OP_ATTRS),		/* All Op Attrs (+) */
 	BER_BVC(LDAP_FEATURE_OBJECTCLASS_ATTRS),	/* OCs in Attrs List (@class) */
 	BER_BVC(LDAP_FEATURE_ABSOLUTE_FILTERS),		/* (&) and (|) search filters */
-	BER_BVC(LDAP_FEATURE_LANGUAGE_TAG_OPTIONS), /* Language Tag Options */
-	BER_BVC(LDAP_FEATURE_LANGUAGE_RANGE_OPTIONS),/* Language Range Options */
+	BER_BVC(LDAP_FEATURE_LANGUAGE_TAG_OPTIONS),	/* Language Tag Options */
+	BER_BVC(LDAP_FEATURE_LANGUAGE_RANGE_OPTIONS),	/* Language Range Options */
 #ifdef LDAP_FEATURE_SUBORDINATE_SCOPE
 	BER_BVC(LDAP_FEATURE_SUBORDINATE_SCOPE),	/* "children" search scope */
 #endif
-	{0,NULL}
+	BER_BVNULL
 };
+static struct berval	*supportedFeatures;
 
 static Entry	*usr_attr = NULL;
 
+static int
+supported_feature_init( void )
+{
+	int		i;
+
+	if ( supportedFeatures != NULL ) {
+		return 0;
+	}
+
+	for ( i = 0; !BER_BVISNULL( &builtin_supportedFeatures[ i ] ); i++ )
+		;
+
+	supportedFeatures = ch_calloc( sizeof( struct berval ), i + 1 );
+	if ( supportedFeatures == NULL ) {
+		return -1;
+	}
+
+	for ( i = 0; !BER_BVISNULL( &builtin_supportedFeatures[ i ] ); i++ ) {
+		ber_dupbv( &supportedFeatures[ i ], &builtin_supportedFeatures[ i ] );
+	}
+	BER_BVZERO( &supportedFeatures[ i ] );
+
+	return 0;
+}
+
+int
+supported_feature_destroy( void )
+{
+	int		i;
+
+	if ( supportedFeatures == NULL ) {
+		return 0;
+	}
+	
+	for ( i = 0; !BER_BVISNULL( &supportedFeatures[ i ] ); i++ ) {
+		ch_free( supportedFeatures[ i ].bv_val );
+	}
+
+	ch_free( supportedFeatures );
+	supportedFeatures = NULL;
+
+	return 0;
+}
+
+int
+supported_feature_load( struct berval *f )
+{
+	struct berval	*tmp;
+	int		i;
+
+	supported_feature_init();
+
+	for ( i = 0; !BER_BVISNULL( &supportedFeatures[ i ] ); i++ )
+		;
+
+	tmp = ch_realloc( supportedFeatures, sizeof( struct berval ) * ( i + 2 ) );
+	if ( tmp == NULL ) {
+		return -1;
+	}
+	supportedFeatures = tmp;
+
+	ber_dupbv( &supportedFeatures[ i ], f );
+	BER_BVZERO( &supportedFeatures[ i + 1 ] );
+
+	return 0;
+}
+
 int
 root_dse_info(
 	Connection *conn,
@@ -173,6 +241,10 @@ root_dse_info(
 #endif /* LDAP_SLAPI */
 
 	/* supportedFeatures */
+	if ( supportedFeatures == NULL ) {
+		supported_feature_init();
+	}
+
 	if( attr_merge( e, ad_supportedFeatures, supportedFeatures, NULL ) ) {
 		return LDAP_OTHER;
 	}
-- 
2.39.5