1 files changed, 88 insertions, 0 deletions
diff --git a/servers/slapd/back-ldap/compare.c b/servers/slapd/back-ldap/compare.c
new file mode 100644
index 0000000..900e107
--- /dev/null
+++ b/servers/slapd/back-ldap/compare.c
@@ -0,0 +1,88 @@
+/* compare.c - ldap backend compare function */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2003-2018 The OpenLDAP Foundation.
+ * Portions Copyright 1999-2003 Howard Chu.
+ * Portions Copyright 2000-2003 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 the 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 the Howard Chu for inclusion
+ * in OpenLDAP Software and subsequently enhanced by Pierangelo
+ * Masarati.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/string.h>
+#include <ac/socket.h>
+
+#include "slap.h"
+#include "back-ldap.h"
+
+int
+ldap_back_compare(
+		Operation	*op,
+		SlapReply	*rs )
+{
+	ldapinfo_t		*li = (ldapinfo_t *)op->o_bd->be_private;
+
+	ldapconn_t		*lc = NULL;
+	ber_int_t		msgid;
+	ldap_back_send_t	retrying = LDAP_BACK_RETRYING;
+	LDAPControl		**ctrls = NULL;
+	int			rc = LDAP_SUCCESS;
+
+	if ( !ldap_back_dobind( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
+		lc = NULL;
+		goto cleanup;
+	}
+
+retry:
+	ctrls = op->o_ctrls;
+	rc = ldap_back_controls_add( op, rs, lc, &ctrls );
+	if ( rc != LDAP_SUCCESS ) {
+		send_ldap_result( op, rs );
+		goto cleanup;
+	}
+
+	rs->sr_err = ldap_compare_ext( lc->lc_ld, op->o_req_dn.bv_val,
+			op->orc_ava->aa_desc->ad_cname.bv_val,
+			&op->orc_ava->aa_value, 
+			ctrls, NULL, &msgid );
+	rc = ldap_back_op_result( lc, op, rs, msgid,
+		li->li_timeout[ SLAP_OP_COMPARE ],
+		( LDAP_BACK_SENDRESULT | retrying ) );
+	if ( rc == LDAP_UNAVAILABLE && retrying ) {
+		retrying &= ~LDAP_BACK_RETRYING;
+		if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
+			/* if the identity changed, there might be need to re-authz */
+			(void)ldap_back_controls_free( op, rs, &ctrls );
+			goto retry;
+		}
+	}
+
+	ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
+	ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_COMPARE ], 1 );
+	ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
+
+cleanup:
+	(void)ldap_back_controls_free( op, rs, &ctrls );
+	
+	if ( lc != NULL ) {
+		ldap_back_release_conn( li, lc );
+	}
+
+	return rs->sr_err;
+}