1 files changed, 455 insertions, 0 deletions
diff --git a/servers/slapd/back-monitor/log.c b/servers/slapd/back-monitor/log.c
new file mode 100644
index 0000000..7f88df0
--- /dev/null
+++ b/servers/slapd/back-monitor/log.c
@@ -0,0 +1,455 @@
+/* log.c - deal with log subsystem */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2001-2021 The OpenLDAP Foundation.
+ * Portions Copyright 2001-2003 Pierangelo Masarati.
+ * All rights reserved.
+ *
+ * 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 file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was initially developed by Pierangelo Masarati for inclusion
+ * in OpenLDAP Software.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/string.h>
+
+#include "slap.h"
+#include <lber_pvt.h>
+#include "lutil.h"
+#include "ldif.h"
+#include "back-monitor.h"
+
+static int 
+monitor_subsys_log_open( 
+	BackendDB		*be,
+	monitor_subsys_t	*ms );
+
+static int 
+monitor_subsys_log_modify( 
+	Operation		*op,
+	SlapReply		*rs,
+	Entry 			*e );
+
+/*
+ * log mutex
+ */
+ldap_pvt_thread_mutex_t		monitor_log_mutex;
+
+static int add_values( Operation *op, Entry *e, Modification *mod, int *newlevel );
+static int delete_values( Operation *op, Entry *e, Modification *mod, int *newlevel );
+static int replace_values( Operation *op, Entry *e, Modification *mod, int *newlevel );
+
+/*
+ * initializes log subentry
+ */
+int
+monitor_subsys_log_init(
+	BackendDB		*be,
+	monitor_subsys_t	*ms )
+{
+	ms->mss_open = monitor_subsys_log_open;
+	ms->mss_modify = monitor_subsys_log_modify;
+
+	ldap_pvt_thread_mutex_init( &monitor_log_mutex );
+
+	return( 0 );
+}
+
+/*
+ * opens log subentry
+ */
+int
+monitor_subsys_log_open(
+	BackendDB		*be,
+	monitor_subsys_t	*ms )
+{
+	BerVarray	bva = NULL;
+
+	if ( loglevel2bvarray( ldap_syslog, &bva ) == 0 && bva != NULL ) {
+		monitor_info_t	*mi;
+		Entry		*e;
+
+		mi = ( monitor_info_t * )be->be_private;
+
+		if ( monitor_cache_get( mi, &ms->mss_ndn, &e ) ) {
+			Debug( LDAP_DEBUG_ANY,
+				"monitor_subsys_log_init: "
+				"unable to get entry \"%s\"\n",
+				ms->mss_ndn.bv_val, 0, 0 );
+			ber_bvarray_free( bva );
+			return( -1 );
+		}
+
+		attr_merge_normalize( e, mi->mi_ad_managedInfo, bva, NULL );
+		ber_bvarray_free( bva );
+
+		monitor_cache_release( mi, e );
+	}
+
+	return( 0 );
+}
+
+static int 
+monitor_subsys_log_modify( 
+	Operation		*op,
+	SlapReply		*rs,
+	Entry 			*e )
+{
+	monitor_info_t	*mi = ( monitor_info_t * )op->o_bd->be_private;
+	int		rc = LDAP_OTHER;
+	int		newlevel = ldap_syslog;
+	Attribute	*save_attrs;
+	Modifications	*modlist = op->orm_modlist;
+	Modifications	*ml;
+
+	ldap_pvt_thread_mutex_lock( &monitor_log_mutex );
+
+	save_attrs = e->e_attrs;
+	e->e_attrs = attrs_dup( e->e_attrs );
+
+	for ( ml = modlist; ml != NULL; ml = ml->sml_next ) {
+		Modification	*mod = &ml->sml_mod;
+
+		/*
+		 * accept all operational attributes;
+		 * this includes modifersName and modifyTimestamp
+		 * if lastmod is "on"
+		 */
+		if ( is_at_operational( mod->sm_desc->ad_type ) ) {
+			( void ) attr_delete( &e->e_attrs, mod->sm_desc );
+			rc = rs->sr_err = attr_merge( e, mod->sm_desc,
+					mod->sm_values, mod->sm_nvalues );
+			if ( rc != LDAP_SUCCESS ) {
+				break;
+			}
+			continue;
+
+		/*
+		 * only the "managedInfo" attribute can be modified
+		 */
+		} else if ( mod->sm_desc != mi->mi_ad_managedInfo ) {
+			rc = rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+			break;
+		}
+
+		switch ( mod->sm_op ) {
+		case LDAP_MOD_ADD:
+			rc = add_values( op, e, mod, &newlevel );
+			break;
+			
+		case LDAP_MOD_DELETE:
+			rc = delete_values( op, e, mod, &newlevel );
+			break;
+
+		case LDAP_MOD_REPLACE:
+			rc = replace_values( op, e, mod, &newlevel );
+			break;
+
+		default:
+			rc = LDAP_OTHER;
+			break;
+		}
+
+		if ( rc != LDAP_SUCCESS ) {
+			rs->sr_err = rc;
+			break;
+		}
+	}
+
+	/* set the new debug level */
+	if ( rc == LDAP_SUCCESS ) {
+		const char	*text;
+		static char	textbuf[ BACKMONITOR_BUFSIZE ];
+
+		/* check for abandon */
+		if ( op->o_abandon ) {
+			rc = rs->sr_err = SLAPD_ABANDON;
+
+			goto cleanup;
+		}
+
+		/* check that the entry still obeys the schema */
+		rc = entry_schema_check( op, e, save_attrs, 0, 0, NULL,
+			&text, textbuf, sizeof( textbuf ) );
+		if ( rc != LDAP_SUCCESS ) {
+			rs->sr_err = rc;
+			goto cleanup;
+		}
+
+		/*
+		 * Do we need to protect this with a mutex?
+		 */
+		ldap_syslog = newlevel;
+
+#if 0	/* debug rather than log */
+		slap_debug = newlevel;
+		lutil_set_debug_level( "slapd", slap_debug );
+		ber_set_option(NULL, LBER_OPT_DEBUG_LEVEL, &slap_debug);
+		ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, &slap_debug);
+		ldif_debug = slap_debug;
+#endif
+	}
+
+cleanup:;
+	if ( rc == LDAP_SUCCESS ) {
+		attrs_free( save_attrs );
+
+	} else {
+		attrs_free( e->e_attrs );
+		e->e_attrs = save_attrs;
+	}
+	
+	ldap_pvt_thread_mutex_unlock( &monitor_log_mutex );
+
+	if ( rc == LDAP_SUCCESS ) {
+		rc = SLAP_CB_CONTINUE;
+	}
+
+	return rc;
+}
+
+static int
+check_constraints( Modification *mod, int *newlevel )
+{
+	int		i;
+
+	if ( mod->sm_nvalues != NULL ) {
+		ber_bvarray_free( mod->sm_nvalues );
+		mod->sm_nvalues = NULL;
+	}
+
+	for ( i = 0; !BER_BVISNULL( &mod->sm_values[ i ] ); i++ ) {
+		int		l;
+		struct berval	bv;
+
+		if ( str2loglevel( mod->sm_values[ i ].bv_val, &l ) ) {
+			return LDAP_CONSTRAINT_VIOLATION;
+		}
+
+		if ( loglevel2bv( l, &bv ) ) {
+			return LDAP_CONSTRAINT_VIOLATION;
+		}
+		
+		assert( bv.bv_len == mod->sm_values[ i ].bv_len );
+		
+		AC_MEMCPY( mod->sm_values[ i ].bv_val,
+				bv.bv_val, bv.bv_len );
+
+		*newlevel |= l;
+	}
+
+	return LDAP_SUCCESS;
+}	
+
+static int 
+add_values( Operation *op, Entry *e, Modification *mod, int *newlevel )
+{
+	Attribute	*a;
+	int		i, rc;
+	MatchingRule 	*mr = mod->sm_desc->ad_type->sat_equality;
+
+	assert( mod->sm_values != NULL );
+
+	rc = check_constraints( mod, newlevel );
+	if ( rc != LDAP_SUCCESS ) {
+		return rc;
+	}
+
+	a = attr_find( e->e_attrs, mod->sm_desc );
+
+	if ( a != NULL ) {
+		/* "managedInfo" SHOULD have appropriate rules ... */
+		if ( mr == NULL || !mr->smr_match ) {
+			return LDAP_INAPPROPRIATE_MATCHING;
+		}
+
+		for ( i = 0; !BER_BVISNULL( &mod->sm_values[ i ] ); i++ ) {
+			int rc;
+			int j;
+			const char *text = NULL;
+			struct berval asserted;
+
+			rc = asserted_value_validate_normalize(
+				mod->sm_desc, mr, SLAP_MR_EQUALITY,
+				&mod->sm_values[ i ], &asserted, &text,
+				op->o_tmpmemctx );
+
+			if ( rc != LDAP_SUCCESS ) {
+				return rc;
+			}
+
+			for ( j = 0; !BER_BVISNULL( &a->a_vals[ j ] ); j++ ) {
+				int match;
+				int rc = value_match( &match, mod->sm_desc, mr,
+					0, &a->a_nvals[ j ], &asserted, &text );
+
+				if ( rc == LDAP_SUCCESS && match == 0 ) {
+					free( asserted.bv_val );
+					return LDAP_TYPE_OR_VALUE_EXISTS;
+				}
+			}
+
+			free( asserted.bv_val );
+		}
+	}
+
+	/* no - add them */
+	rc = attr_merge_normalize( e, mod->sm_desc, mod->sm_values,
+		op->o_tmpmemctx );
+	if ( rc != LDAP_SUCCESS ) {
+		return rc;
+	}
+
+	return LDAP_SUCCESS;
+}
+
+static int
+delete_values( Operation *op, Entry *e, Modification *mod, int *newlevel )
+{
+	int             i, j, k, found, rc, nl = 0;
+	Attribute       *a;
+	MatchingRule 	*mr = mod->sm_desc->ad_type->sat_equality;
+
+	/* delete the entire attribute */
+	if ( mod->sm_values == NULL ) {
+		int rc = attr_delete( &e->e_attrs, mod->sm_desc );
+
+		if ( rc ) {
+			rc = LDAP_NO_SUCH_ATTRIBUTE;
+
+		} else {
+			*newlevel = 0;
+			rc = LDAP_SUCCESS;
+		}
+		return rc;
+	}
+
+	rc = check_constraints( mod, &nl );
+	if ( rc != LDAP_SUCCESS ) {
+		return rc;
+	}
+
+	*newlevel &= ~nl;
+
+	if ( mr == NULL || !mr->smr_match ) {
+		/* disallow specific attributes from being deleted if
+		 * no equality rule */
+		return LDAP_INAPPROPRIATE_MATCHING;
+	}
+
+	/* delete specific values - find the attribute first */
+	if ( (a = attr_find( e->e_attrs, mod->sm_desc )) == NULL ) {
+		return( LDAP_NO_SUCH_ATTRIBUTE );
+	}
+
+	/* find each value to delete */
+	for ( i = 0; !BER_BVISNULL( &mod->sm_values[ i ] ); i++ ) {
+		int rc;
+		const char *text = NULL;
+
+		struct berval asserted;
+
+		rc = asserted_value_validate_normalize(
+				mod->sm_desc, mr, SLAP_MR_EQUALITY,
+				&mod->sm_values[ i ], &asserted, &text,
+				op->o_tmpmemctx );
+
+		if( rc != LDAP_SUCCESS ) return rc;
+
+		found = 0;
+		for ( j = 0; !BER_BVISNULL( &a->a_vals[ j ] ); j++ ) {
+			int match;
+			int rc = value_match( &match, mod->sm_desc, mr,
+				0, &a->a_nvals[ j ], &asserted, &text );
+
+			if( rc == LDAP_SUCCESS && match != 0 ) {
+				continue;
+			}
+
+			/* found a matching value */
+			found = 1;
+
+			/* delete it */
+			if ( a->a_nvals != a->a_vals ) {
+				free( a->a_nvals[ j ].bv_val );
+				for ( k = j + 1; !BER_BVISNULL( &a->a_nvals[ k ] ); k++ ) {
+					a->a_nvals[ k - 1 ] = a->a_nvals[ k ];
+				}
+				BER_BVZERO( &a->a_nvals[ k - 1 ] );
+			}
+
+			free( a->a_vals[ j ].bv_val );
+			for ( k = j + 1; !BER_BVISNULL( &a->a_vals[ k ] ); k++ ) {
+				a->a_vals[ k - 1 ] = a->a_vals[ k ];
+			}
+			BER_BVZERO( &a->a_vals[ k - 1 ] );
+			a->a_numvals--;
+
+			break;
+		}
+
+		free( asserted.bv_val );
+
+		/* looked through them all w/o finding it */
+		if ( ! found ) {
+			return LDAP_NO_SUCH_ATTRIBUTE;
+		}
+	}
+
+	/* if no values remain, delete the entire attribute */
+	if ( BER_BVISNULL( &a->a_vals[ 0 ] ) ) {
+		assert( a->a_numvals == 0 );
+
+		/* should already be zero */
+		*newlevel = 0;
+		
+		if ( attr_delete( &e->e_attrs, mod->sm_desc ) ) {
+			return LDAP_NO_SUCH_ATTRIBUTE;
+		}
+	}
+
+	return LDAP_SUCCESS;
+}
+
+static int
+replace_values( Operation *op, Entry *e, Modification *mod, int *newlevel )
+{
+	int rc;
+
+	if ( mod->sm_values != NULL ) {
+		*newlevel = 0;
+		rc = check_constraints( mod, newlevel );
+		if ( rc != LDAP_SUCCESS ) {
+			return rc;
+		}
+	}
+
+	rc = attr_delete( &e->e_attrs, mod->sm_desc );
+
+	if ( rc != LDAP_SUCCESS && rc != LDAP_NO_SUCH_ATTRIBUTE ) {
+		return rc;
+	}
+
+	if ( mod->sm_values != NULL ) {
+		rc = attr_merge_normalize( e, mod->sm_desc, mod->sm_values,
+				op->o_tmpmemctx );
+		if ( rc != LDAP_SUCCESS ) {
+			return rc;
+		}
+	}
+
+	return LDAP_SUCCESS;
+}
+