/* group.c - bdb backend acl group routine */
/* $OpenLDAP: pkg/ldap/servers/slapd/back-bdb/group.c,v 1.9.2.12 2003/04/25 08:30:00 hyc Exp $ */
/*
 * Copyright 1998-2003 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-bdb.h"
#include "proto-bdb.h"


/* return 0 IFF op_dn is a value in member attribute
 * of entry with gr_dn AND that entry has an objectClass
 * value of groupOfNames
 */
int
bdb_group(
	Backend	*be,
	Connection *conn,
	Operation *op,
	Entry	*target,
	struct berval	*gr_ndn,
	struct berval	*op_ndn,
	ObjectClass *group_oc,
	AttributeDescription *group_at )
{
	struct bdb_info *bdb = (struct bdb_info *) be->be_private;
	struct bdb_op_info *boi = NULL;
	DB_TXN *txn = NULL;
	Entry *e;
	int	rc = 1;
	Attribute *attr;
	struct berval *op_name = op_ndn;

	const char *group_oc_name = NULL;
	const char *group_at_name = group_at->ad_cname.bv_val;

	u_int32_t	locker = 0;
	DB_LOCK		lock;
	int		free_lock_id = 0;

	if( group_oc->soc_names && group_oc->soc_names[0] ) {
		group_oc_name = group_oc->soc_names[0];
	} else {
		group_oc_name = group_oc->soc_oid;
	}

#ifdef NEW_LOGGING
	LDAP_LOG( BACK_BDB, ENTRY, 
		"bdb_group: check (%s) member of (%s), oc %s\n",
		op_ndn->bv_val, gr_ndn->bv_val, group_oc_name );
#else
	Debug( LDAP_DEBUG_ARGS,
		"=> bdb_group: group ndn: \"%s\"\n",
		gr_ndn->bv_val, 0, 0 ); 

	Debug( LDAP_DEBUG_ARGS,
		"=> bdb_group: op ndn: \"%s\"\n",
		op_ndn->bv_val, 0, 0 ); 

	Debug( LDAP_DEBUG_ARGS,
		"=> bdb_group: oc: \"%s\" at: \"%s\"\n", 
		group_oc_name, group_at_name, 0 ); 

	Debug( LDAP_DEBUG_ARGS,
		"=> bdb_group: tr ndn: \"%s\"\n",
		target ? target->e_ndn : "", 0, 0 ); 
#endif

	if( op ) boi = (struct bdb_op_info *) op->o_private;
	if( boi != NULL && be == boi->boi_bdb ) {
		txn = boi->boi_txn;
		locker = boi->boi_locker;
	}

	if ( txn ) {
		locker = TXN_ID( txn );
	} else if ( !locker ) {
		rc = LOCK_ID ( bdb->bi_dbenv, &locker );
		free_lock_id = 1;
		switch(rc) {
		case 0:
			break;
		default:
			return 1;
		}
	}

	if ( target != NULL && dn_match( &target->e_nname, gr_ndn )) {
		/* we already have a LOCKED copy of the entry */
		e = target;
#ifdef NEW_LOGGING
		LDAP_LOG( BACK_BDB, DETAIL1, 
			"bdb_group: target is group (%s)\n", gr_ndn->bv_val, 0, 0 );
#else
		Debug( LDAP_DEBUG_ARGS,
			"=> bdb_group: target is group: \"%s\"\n",
			gr_ndn->bv_val, 0, 0 );
#endif
	} else {
dn2entry_retry:
		/* can we find group entry */
		rc = bdb_dn2entry_r( be, txn, gr_ndn, &e, NULL, 0, locker, &lock ); 
		if( rc ) {
			if ( boi ) boi->boi_err = rc;
			if ( rc == DB_LOCK_DEADLOCK || rc == DB_LOCK_NOTGRANTED ) {
				if ( txn ) {
				/* must let owning txn abort, but our result
				 * is still inconclusive, so don't let it
				 * get cached.
				 */
					op->o_do_not_cache = 1;
					return( 1 );
				}
				ldap_pvt_thread_yield();
				goto dn2entry_retry;
			}
			if ( free_lock_id ) {
				LOCK_ID_FREE ( bdb->bi_dbenv, locker );
			}
			return( 1 );
		}
		if (e == NULL) {
#ifdef NEW_LOGGING
			LDAP_LOG( BACK_BDB, DETAIL1, 
				"bdb_group: cannot find group (%s)\n", gr_ndn->bv_val, 0, 0 );
#else
			Debug( LDAP_DEBUG_ACL,
				"=> bdb_group: cannot find group: \"%s\"\n",
					gr_ndn->bv_val, 0, 0 ); 
#endif
			if ( free_lock_id ) {
				LOCK_ID_FREE ( bdb->bi_dbenv, locker );
			}
			return( 1 );
		}
#ifdef NEW_LOGGING
		LDAP_LOG( BACK_BDB, DETAIL1, 
			"bdb_group: found group (%s)\n", gr_ndn->bv_val, 0, 0 );
#else
		Debug( LDAP_DEBUG_ACL,
			"=> bdb_group: found group: \"%s\"\n",
			gr_ndn->bv_val, 0, 0 ); 
#endif
	}

	/* find it's objectClass and member attribute values
	 * make sure this is a group entry
	 * finally test if we can find op_dn in the member attribute value list
	 */
	rc = 1;

#ifdef BDB_ALIASES
	if( is_entry_alias( e ) ) {
#ifdef NEW_LOGGING
		LDAP_LOG( BACK_BDB, INFO, 
			"bdb_group: group (%s) is an alias\n", gr_ndn->bv_val, 0, 0);
#else
		Debug( LDAP_DEBUG_ACL,
			"<= bdb_group: group is an alias\n", 0, 0, 0 );
#endif
		goto return_results;
	}
#endif

	if( is_entry_referral( e ) ) {
#ifdef NEW_LOGGING
		LDAP_LOG( BACK_BDB, INFO, 
			"bdb_group: group (%s) is a referral.\n", gr_ndn->bv_val, 0, 0 );
#else
		Debug( LDAP_DEBUG_ACL,
			"<= bdb_group: group is a referral\n", 0, 0, 0 );
#endif
		goto return_results;
	}

	if( !is_entry_objectclass( e, group_oc, 0 ) ) {
#ifdef NEW_LOGGING
		LDAP_LOG( BACK_BDB, ERR, 
			"bdb_group: failed to find %s in objectClass.\n", 
			group_oc_name, 0, 0 );
#else
		Debug( LDAP_DEBUG_ACL,
			"<= bdb_group: failed to find %s in objectClass\n", 
				group_oc_name, 0, 0 ); 
#endif
		goto return_results;
	}

	if ((attr = attr_find(e->e_attrs, group_at)) == NULL) {
#ifdef NEW_LOGGING
		LDAP_LOG( BACK_BDB, INFO, 
			"bdb_group: failed to find %s\n", group_at_name, 0, 0 );
#else
		Debug( LDAP_DEBUG_ACL,
			"<= bdb_group: failed to find %s\n",
			group_at_name, 0, 0 ); 
#endif
		goto return_results;
	}

#ifdef NEW_LOGGING
	LDAP_LOG( BACK_BDB, ENTRY, 
		"bdb_group: found objectClass %s and %s\n",
		group_oc_name, group_at_name, 0 );
#else
	Debug( LDAP_DEBUG_ACL,
		"<= bdb_group: found objectClass %s and %s\n",
		group_oc_name, group_at_name, 0 ); 
#endif

	if( is_at_syntax( group_at->ad_type, SLAPD_IA5STRING_SYNTAX ) ) {
		if ( strncmp( op_ndn->bv_val, "uid=", sizeof("uid=") - 1 ) == 0 ) {
			char* begin = op_ndn->bv_val + sizeof("uid=") - 1;
			char* end = strchr( op_ndn->bv_val, ',' );
			ber_len_t len = end ? end - begin : strlen( begin );
			op_name = ber_str2bv(begin, len, 1, NULL);
		}
	}

	if( value_find_ex( group_at,
		SLAP_MR_VALUE_NORMALIZED_MATCH,
		attr->a_vals, op_name ) != LDAP_SUCCESS )
	{
#ifdef NEW_LOGGING
		LDAP_LOG( BACK_BDB, DETAIL1, 
			"bdb_group: \"%s\" not in \"%s\": %s\n",
			op_ndn->bv_val, gr_ndn->bv_val, group_at_name );
#else
		Debug( LDAP_DEBUG_ACL,
			"<= bdb_group: \"%s\" not in \"%s\": %s\n", 
			op_ndn->bv_val, gr_ndn->bv_val, group_at_name ); 
#endif
		goto return_results;
	}

#ifdef NEW_LOGGING
	LDAP_LOG( BACK_BDB, DETAIL1, "bdb_group: %s is in %s: %s\n",
		op_ndn->bv_val, gr_ndn->bv_val, group_at_name );
#else
	Debug( LDAP_DEBUG_ACL,
		"<= bdb_group: \"%s\" is in \"%s\": %s\n", 
		op_ndn->bv_val, gr_ndn->bv_val, group_at_name ); 
#endif

	rc = 0;

return_results:
	if( target != e ) {
		/* free entry */
		bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
	}

	if ( free_lock_id ) {
		LOCK_ID_FREE ( bdb->bi_dbenv, locker );
	}

	if ( op_name != op_ndn ) {
		ber_bvfree(op_name);
	}

#ifdef NEW_LOGGING
	LDAP_LOG( BACK_BDB, ENTRY, "bdb_group: rc=%d\n", rc, 0, 0 );
#else
	Debug( LDAP_DEBUG_TRACE, "bdb_group: rc=%d\n", rc, 0, 0 ); 
#endif

	return(rc);
}

