--- servers/slapd/root_dse.c	2003/09/18 15:43:35	1.81.2.2
+++ servers/slapd/root_dse.c	2010/04/13 20:18:08	1.130
@@ -1,13 +1,17 @@
-/* $OpenLDAP: pkg/ldap/servers/slapd/root_dse.c,v 1.81.2.1 2003/05/31 19:01:40 kurt Exp $ */
-/* root_dse.c - Provides the ROOT DSA-Specific Entry
+/* root_dse.c - Provides the Root DSA-Specific Entry */
+/* $OpenLDAP: pkg/ldap/servers/slapd/root_dse.c,v 1.129 2009/07/07 20:30:55 hyc Exp $ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
  *
- * Copyright 1999-2003 The OpenLDAP Foundation.
+ * Copyright 1999-2010 The OpenLDAP Foundation.
  * All rights reserved.
  *
- * Redistribution and use in source and binary forms are permitted only
- * as authorized by the OpenLDAP Public License.  A copy of this
- * license is available at http://www.OpenLDAP.org/license.html or
- * in file LICENSE in the top-level directory of the distribution.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
  */
 
 #include "portable.h"
@@ -21,21 +25,156 @@
 #include "lber_pvt.h"
 
 #ifdef LDAP_SLAPI
-#include "slapi.h"
+#include "slapi/slapi.h"
 #endif
 
-static struct berval supportedFeatures[] = {
-	BER_BVC(LDAP_FEATURE_ALL_OPERATIONAL_ATTRS), /* All Op Attrs (+) */
-	BER_BVC(LDAP_FEATURE_OBJECTCLASS_ATTRS), /* OCs in Attrs List (+person) */
-	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_MODIFY_INCREMENT), /* Modify/increment */
-	{0,NULL}
+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 */
+#ifdef LDAP_DEVEL
+	BER_BVC(LDAP_FEATURE_SUBORDINATE_SCOPE),	/* "children" search scope */
+#endif
+	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,
@@ -43,10 +182,13 @@ root_dse_info(
 	const char **text )
 {
 	Entry		*e;
-	struct berval vals[2], *bv;
-	struct berval nvals[2];
+	struct berval val;
+#ifdef LDAP_SLAPI
+	struct berval *bv;
+#endif
 	int		i, j;
 	char ** supportedSASLMechanisms;
+	BackendDB *be;
 
 	AttributeDescription *ad_structuralObjectClass
 		= slap_schema.si_ad_structuralObjectClass;
@@ -54,8 +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
@@ -64,22 +208,15 @@ root_dse_info(
 		= slap_schema.si_ad_supportedFeatures;
 	AttributeDescription *ad_monitorContext
 		= slap_schema.si_ad_monitorContext;
+	AttributeDescription *ad_configContext
+		= slap_schema.si_ad_configContext;
 	AttributeDescription *ad_ref
 		= slap_schema.si_ad_ref;
 
-	vals[1].bv_val = NULL;
-	nvals[1].bv_val = NULL;
-
-	e = (Entry *) SLAP_CALLOC( 1, sizeof(Entry) );
-
+	e = entry_alloc();
 	if( e == NULL ) {
-#ifdef NEW_LOGGING
-		LDAP_LOG( OPERATION, ERR,
-			"root_dse_info: SLAP_CALLOC failed", 0, 0, 0 );
-#else
 		Debug( LDAP_DEBUG_ANY,
-			"root_dse_info: SLAP_CALLOC failed", 0, 0, 0 );
-#endif
+			"root_dse_info: entry_alloc failed", 0, 0, 0 );
 		return LDAP_OTHER;
 	}
 
@@ -95,38 +232,54 @@ root_dse_info(
 
 	e->e_private = NULL;
 
-	vals[0].bv_val = "top";
-	vals[0].bv_len = sizeof("top")-1;
-	if( attr_merge( e, ad_objectClass, vals, NULL ) ) {
+	/* FIXME: is this really needed? */
+	BER_BVSTR( &val, "top" );
+	if( attr_merge_one( e, ad_objectClass, &val, NULL ) ) {
+fail:
+		entry_free( e );
 		return LDAP_OTHER;
 	}
 
-	vals[0].bv_val = "OpenLDAProotDSE";
-	vals[0].bv_len = sizeof("OpenLDAProotDSE")-1;
-	if( attr_merge( e, ad_objectClass, vals, NULL ) ) {
-		return LDAP_OTHER;
-	}
-	if( attr_merge( e, ad_structuralObjectClass, vals, NULL ) ) {
-		return LDAP_OTHER;
+	BER_BVSTR( &val, "OpenLDAProotDSE" );
+	if( attr_merge_one( e, ad_objectClass, &val, NULL ) ) {
+		goto fail;
+	}
+	if( attr_merge_one( e, ad_structuralObjectClass, &val, NULL ) ) {
+		goto fail;
 	}
 
-	for ( i = 0; i < nbackends; i++ ) {
-		if ( backends[i].be_flags & SLAP_BFLAG_MONITOR ) {
-			vals[0] = backends[i].be_suffix[0];
-			nvals[0] = backends[i].be_nsuffix[0];
-			if( attr_merge( e, ad_monitorContext, vals, nvals ) ) {
-				return LDAP_OTHER;
+	LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
+		if ( be->be_suffix == NULL
+				|| be->be_nsuffix == NULL ) {
+			/* no suffix! */
+			continue;
+		}
+		if ( SLAP_MONITOR( be )) {
+			if( attr_merge_one( e, ad_monitorContext,
+					&be->be_suffix[0],
+					&be->be_nsuffix[0] ) )
+			{
+				goto fail;
+			}
+			continue;
+		}
+		if ( SLAP_CONFIG( be )) {
+			if( attr_merge_one( e, ad_configContext,
+					&be->be_suffix[0],
+					& be->be_nsuffix[0] ) )
+			{
+				goto fail;
 			}
 			continue;
 		}
-		if ( SLAP_GLUE_SUBORDINATE( &backends[i] ) ) {
+		if ( SLAP_GLUE_SUBORDINATE( be ) && !SLAP_GLUE_ADVERTISE( be ) ) {
 			continue;
 		}
-		for ( j = 0; backends[i].be_suffix[j].bv_val != NULL; j++ ) {
-			vals[0] = backends[i].be_suffix[j];
-			nvals[0] = backends[i].be_nsuffix[0];
-			if( attr_merge( e, ad_namingContexts, vals, nvals ) ) {
-				return LDAP_OTHER;
+		for ( j = 0; be->be_suffix[j].bv_val != NULL; j++ ) {
+			if( attr_merge_one( e, ad_namingContexts,
+					&be->be_suffix[j], NULL ) )
+			{
+				goto fail;
 			}
 		}
 	}
@@ -135,43 +288,45 @@ root_dse_info(
 
 	/* supportedControl */
 	if ( controls_root_dse_info( e ) != 0 ) {
-		return LDAP_OTHER;
+		goto fail;
 	}
 
 	/* supportedExtension */
 	if ( exop_root_dse_info( e ) != 0 ) {
-		return LDAP_OTHER;
+		goto fail;
 	}
 
 #ifdef LDAP_SLAPI
 	/* netscape supportedExtension */
-	for ( i = 0; (bv = ns_get_supported_extop(i)) != NULL; i++ ) {
-		vals[0] = *bv;
-		if( attr_merge( e, ad_supportedExtension, vals, NULL )) {
-			return LDAP_OTHER;
+	for ( i = 0; (bv = slapi_int_get_supported_extop(i)) != NULL; i++ ) {
+		if( attr_merge_one( e, ad_supportedExtension, bv, NULL ) ) {
+			goto fail;
 		}
 	}
 #endif /* LDAP_SLAPI */
 
 	/* supportedFeatures */
+	if ( supportedFeatures == NULL ) {
+		supported_feature_init();
+	}
+
 	if( attr_merge( e, ad_supportedFeatures, supportedFeatures, NULL ) ) {
-		return LDAP_OTHER;
+		goto fail;
 	}
 
 	/* supportedLDAPVersion */
-	for ( i=LDAP_VERSION_MIN; i<=LDAP_VERSION_MAX; i++ ) {
-		char buf[BUFSIZ];
-		if (!( global_allows & SLAP_ALLOW_BIND_V2 ) &&
-			( i < LDAP_VERSION3 ) )
-		{
-			/* version 2 and lower are disallowed */
-			continue;
-		}
+		/* don't publish version 2 as we don't really support it
+		 * (even when configured to accept version 2 Bind requests)
+		 * and the value would never be used by true LDAPv2 (or LDAPv3)
+		 * clients.
+		 */
+	for ( i=LDAP_VERSION3; i<=LDAP_VERSION_MAX; i++ ) {
+		char buf[sizeof("255")];
 		snprintf(buf, sizeof buf, "%d", i);
-		vals[0].bv_val = buf;
-		vals[0].bv_len = strlen( vals[0].bv_val );
-		if( attr_merge( e, ad_supportedLDAPVersion, vals, NULL ) ) {
-			return LDAP_OTHER;
+		val.bv_val = buf;
+		val.bv_len = strlen( val.bv_val );
+		if( attr_merge_one( e, ad_supportedLDAPVersion, &val, NULL ) ) {
+			goto fail;
 		}
 	}
 
@@ -180,10 +335,11 @@ root_dse_info(
 
 	if( supportedSASLMechanisms != NULL ) {
 		for ( i=0; supportedSASLMechanisms[i] != NULL; i++ ) {
-			vals[0].bv_val = supportedSASLMechanisms[i];
-			vals[0].bv_len = strlen( vals[0].bv_val );
-			if( attr_merge( e, ad_supportedSASLMechanisms, vals, NULL ) ) {
-				return LDAP_OTHER;
+			val.bv_val = supportedSASLMechanisms[i];
+			val.bv_len = strlen( val.bv_val );
+			if( attr_merge_one( e, ad_supportedSASLMechanisms, &val, NULL ) ) {
+				ldap_charray_free( supportedSASLMechanisms );
+				goto fail;
 			}
 		}
 		ldap_charray_free( supportedSASLMechanisms );
@@ -191,7 +347,7 @@ root_dse_info(
 
 	if ( default_referral != NULL ) {
 		if( attr_merge( e, ad_ref, default_referral, NULL /* FIXME */ ) ) {
-			return LDAP_OTHER;
+			goto fail;
 		}
 	}
 
@@ -201,67 +357,90 @@ root_dse_info(
 			if( attr_merge( e, a->a_desc, a->a_vals,
 				(a->a_nvals == a->a_vals) ? NULL : a->a_nvals ) )
 			{
-				return LDAP_OTHER;
+				goto fail;
 			}
 		}
 	}
 
+	if ( extra_info ) {
+		entry_info_t	*ei = extra_info;
+
+		for ( ; ei; ei = ei->next ) {
+			ei->func( ei->arg, e );
+		}
+	}
+
 	*entry = e;
 	return LDAP_SUCCESS;
 }
 
+int
+root_dse_init( void )
+{
+	return 0;
+}
+
+int
+root_dse_destroy( void )
+{
+	if ( usr_attr ) {
+		entry_free( usr_attr );
+		usr_attr = NULL;
+	}
+
+	return 0;
+}
+
 /*
  * Read the entries specified in fname and merge the attributes
  * to the user defined rootDSE. Note thaat if we find any errors
  * what so ever, we will discard the entire entries, print an
  * error message and return.
  */
-int read_root_dse_file( const char *fname )
+int
+root_dse_read_file( const char *fname )
 {
-	FILE	*fp;
-	int rc = 0, lineno = 0, lmax = 0;
+	struct LDIFFP	*fp;
+	int rc = 0, lineno = 0, lmax = 0, ldifrc;
 	char	*buf = NULL;
 
-	if ( (fp = fopen( fname, "r" )) == NULL ) {
+	if ( (fp = ldif_open( fname, "r" )) == NULL ) {
 		Debug( LDAP_DEBUG_ANY,
-			"could not open rootdse attr file \"%s\" - absolute path?\n",
+			"root_dse_read_file: could not open rootdse attr file \"%s\" - absolute path?\n",
 			fname, 0, 0 );
 		perror( fname );
 		return EXIT_FAILURE;
 	}
 
-	usr_attr = (Entry *) SLAP_CALLOC( 1, sizeof(Entry) );
+	usr_attr = entry_alloc();
 	if( usr_attr == NULL ) {
-#ifdef NEW_LOGGING
-		LDAP_LOG( OPERATION, ERR,
-			"read_root_dse_file: SLAP_CALLOC failed", 0, 0, 0 );
-#else
 		Debug( LDAP_DEBUG_ANY,
-			"read_root_dse_file: SLAP_CALLOC failed", 0, 0, 0 );
-#endif
-		fclose( fp );
+			"root_dse_read_file: entry_alloc failed", 0, 0, 0 );
+		ldif_close( fp );
 		return LDAP_OTHER;
 	}
 	usr_attr->e_attrs = NULL;
 
-	while( ldif_read_record( fp, &lineno, &buf, &lmax ) ) {
+	while(( ldifrc = ldif_read_record( fp, &lineno, &buf, &lmax )) > 0 ) {
 		Entry *e = str2entry( buf );
 		Attribute *a;
 
 		if( e == NULL ) {
-			fprintf( stderr, "root_dse: could not parse entry (line=%d)\n",
-				lineno );
-			rc = EXIT_FAILURE;
+			Debug( LDAP_DEBUG_ANY, "root_dse_read_file: "
+				"could not parse entry (file=\"%s\" line=%d)\n",
+				fname, lineno, 0 );
+			rc = LDAP_OTHER;
 			break;
 		}
 
 		/* make sure the DN is the empty DN */
 		if( e->e_nname.bv_len ) {
-			fprintf( stderr,
-				"root_dse: invalid rootDSE - dn=\"%s\" (line=%d)\n",
-				e->e_dn, lineno );
+			Debug( LDAP_DEBUG_ANY,
+				"root_dse_read_file: invalid rootDSE "
+				"- dn=\"%s\" (file=\"%s\" line=%d)\n",
+				e->e_dn, fname, lineno );
 			entry_free( e );
-			rc = EXIT_FAILURE;
+			rc = LDAP_OTHER;
 			break;
 		}
 
@@ -284,6 +463,9 @@ int read_root_dse_file( const char *fnam
 		if (rc) break;
 	}
 
+	if ( ldifrc < 0 )
+		rc = LDAP_OTHER;
+
 	if (rc) {
 		entry_free( usr_attr );
 		usr_attr = NULL;
@@ -291,8 +473,69 @@ int read_root_dse_file( const char *fnam
 
 	ch_free( buf );
 
-	fclose( fp );
+	ldif_close( fp );
 
-	Debug(LDAP_DEBUG_CONFIG, "rootDSE file %s read.\n", fname, 0, 0);
+	Debug(LDAP_DEBUG_CONFIG, "rootDSE file=\"%s\" read.\n", fname, 0, 0);
 	return rc;
 }
+
+int
+slap_discover_feature(
+	slap_bindconf	*sb,
+	const char	*attr,
+	const char	*val )
+{
+	LDAP		*ld = NULL;
+	LDAPMessage	*res = NULL, *entry;
+	int		rc, i;
+	struct berval	bv_val,
+			**values = NULL;
+	char		*attrs[ 2 ] = { NULL, NULL };
+
+	rc = slap_client_connect( &ld, sb );
+	if ( rc != LDAP_SUCCESS ) {
+		goto done;
+	}
+
+	attrs[ 0 ] = (char *) attr;
+	rc = ldap_search_ext_s( ld, "", LDAP_SCOPE_BASE, "(objectClass=*)",
+			attrs, 0, NULL, NULL, NULL, 0, &res );
+	if ( rc != LDAP_SUCCESS ) {
+		goto done;
+	}
+
+	entry = ldap_first_entry( ld, res );
+	if ( entry == NULL ) {
+		goto done;
+	}
+
+	values = ldap_get_values_len( ld, entry, attrs[ 0 ] );
+	if ( values == NULL ) {
+		rc = LDAP_NO_SUCH_ATTRIBUTE;
+		goto done;
+	}
+
+	ber_str2bv( val, 0, 0, &bv_val );
+	for ( i = 0; values[ i ] != NULL; i++ ) {
+		if ( bvmatch( &bv_val, values[ i ] ) ) {
+			rc = LDAP_COMPARE_TRUE;
+			goto done;
+		}
+	}
+
+	rc = LDAP_COMPARE_FALSE;
+
+done:;
+	if ( values != NULL ) {
+		ldap_value_free_len( values );
+	}
+
+	if ( res != NULL ) {
+		ldap_msgfree( res );
+	}
+
+	ldap_unbind_ext( ld, NULL, NULL );
+
+	return rc;
+}
+