--- servers/slapd/root_dse.c	2005/07/14 17:52:09	1.108
+++ servers/slapd/root_dse.c	2006/04/11 16:07:17	1.113.2.1
@@ -1,8 +1,8 @@
 /* root_dse.c - Provides the Root DSA-Specific Entry */
-/* $OpenLDAP: pkg/ldap/servers/slapd/root_dse.c,v 1.107 2005/07/04 03:24:00 hallvard Exp $ */
+/* $OpenLDAP: pkg/ldap/servers/slapd/root_dse.c,v 1.114 2006/04/06 19:29:38 kurt Exp $ */
 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
  *
- * Copyright 1999-2005 The OpenLDAP Foundation.
+ * Copyright 1999-2006 The OpenLDAP Foundation.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -28,23 +28,153 @@
 #include "slapi/slapi.h"
 #endif
 
-static struct berval supportedFeatures[] = {
-	BER_BVC(LDAP_FEATURE_ALL_OP_ATTRS),			/* All Op Attrs (+) */
+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_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
-#ifdef LDAP_FEATURE_MODIFY_INCREMENT
-	BER_BVC(LDAP_FEATURE_MODIFY_INCREMENT),		/* Modify/increment */
-#endif
-	{0,NULL}
+	BER_BVNULL
 };
+static struct berval	*supportedFeatures;
 
 static Entry	*usr_attr = NULL;
 
+/*
+ * allow modules to register functions that muck with the root DSE entry
+ */
+
+typedef struct entry_info_t {
+	SLAP_ENTRY_INFO_FN	func;
+	void			*arg;
+	struct entry_info_t	*next;
+} entry_info_t;
+
+static entry_info_t *extra_info;
+
+int
+entry_info_register( SLAP_ENTRY_INFO_FN func, void *arg )
+{
+	entry_info_t	*ei = ch_calloc( 1, sizeof( entry_info_t ) );
+
+	ei->func = func;
+	ei->arg = arg;
+
+	ei->next = extra_info;
+	extra_info = ei;
+
+	return 0;
+}
+
+int
+entry_info_unregister( SLAP_ENTRY_INFO_FN func, void *arg )
+{
+	entry_info_t	**eip;
+
+	for ( eip = &extra_info; *eip != NULL; eip = &(*eip)->next ) {
+		if ( (*eip)->func == func && (*eip)->arg == arg ) {
+			entry_info_t	*ei = *eip;
+
+			*eip = ei->next;
+
+			ch_free( ei );
+
+			return 0;
+		}
+	}
+
+	return -1;
+}
+
+void
+entry_info_destroy( void )
+{
+	entry_info_t	**eip;
+
+	for ( eip = &extra_info; *eip != NULL;  ) {
+		entry_info_t	*ei = *eip;
+
+		eip = &(*eip)->next;
+
+		ch_free( ei );
+	}
+}
+
+/*
+ * Allow modules to register supported features
+ */
+
+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,
@@ -52,7 +182,10 @@ root_dse_info(
 	const char **text )
 {
 	Entry		*e;
-	struct berval val, *bv;
+	struct berval val;
+#ifdef LDAP_SLAPI
+	struct berval *bv;
+#endif
 	int		i, j;
 	char ** supportedSASLMechanisms;
 	BackendDB *be;
@@ -63,8 +196,10 @@ root_dse_info(
 		= slap_schema.si_ad_objectClass;
 	AttributeDescription *ad_namingContexts
 		= slap_schema.si_ad_namingContexts;
+#ifdef LDAP_SLAPI
 	AttributeDescription *ad_supportedExtension
 		= slap_schema.si_ad_supportedExtension;
+#endif
 	AttributeDescription *ad_supportedLDAPVersion
 		= slap_schema.si_ad_supportedLDAPVersion;
 	AttributeDescription *ad_supportedSASLMechanisms
@@ -79,7 +214,6 @@ root_dse_info(
 		= slap_schema.si_ad_ref;
 
 	e = (Entry *) SLAP_CALLOC( 1, sizeof(Entry) );
-
 	if( e == NULL ) {
 		Debug( LDAP_DEBUG_ANY,
 			"root_dse_info: SLAP_CALLOC failed", 0, 0, 0 );
@@ -98,6 +232,7 @@ root_dse_info(
 
 	e->e_private = NULL;
 
+	/* FIXME: is this really needed? */
 	BER_BVSTR( &val, "top" );
 	if( attr_merge_one( e, ad_objectClass, &val, NULL ) ) {
 		return LDAP_OTHER;
@@ -170,6 +305,10 @@ root_dse_info(
 #endif /* LDAP_SLAPI */
 
 	/* supportedFeatures */
+	if ( supportedFeatures == NULL ) {
+		supported_feature_init();
+	}
+
 	if( attr_merge( e, ad_supportedFeatures, supportedFeatures, NULL ) ) {
 		return LDAP_OTHER;
 	}
@@ -221,6 +360,14 @@ root_dse_info(
 		}
 	}
 
+	if ( extra_info ) {
+		entry_info_t	*ei = extra_info;
+
+		for ( ; ei; ei = ei->next ) {
+			ei->func( ei->arg, e );
+		}
+	}
+
 	*entry = e;
 	return LDAP_SUCCESS;
 }