1 files changed, 319 insertions, 0 deletions
diff --git a/libraries/libldap/unbind.c b/libraries/libldap/unbind.c
new file mode 100644
index 0000000..820d48f
--- /dev/null
+++ b/libraries/libldap/unbind.c
@@ -0,0 +1,319 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2022 The OpenLDAP Foundation.
+ * 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>.
+ */
+/* Portions Copyright (c) 1990 Regents of the University of Michigan.
+ * All rights reserved.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/stdlib.h>
+
+#include <ac/socket.h>
+#include <ac/string.h>
+#include <ac/time.h>
+
+#include "ldap-int.h"
+
+/* An Unbind Request looks like this:
+ *
+ *	UnbindRequest ::= [APPLICATION 2] NULL
+ *
+ * and has no response.  (Source: RFC 4511)
+ */
+
+int
+ldap_unbind_ext(
+	LDAP *ld,
+	LDAPControl **sctrls,
+	LDAPControl **cctrls )
+{
+	int rc;
+
+	assert( ld != NULL );
+	assert( LDAP_VALID( ld ) );
+
+	/* check client controls */
+	rc = ldap_int_client_controls( ld, cctrls );
+	if( rc != LDAP_SUCCESS ) return rc;
+
+	return ldap_ld_free( ld, 1, sctrls, cctrls );
+}
+
+int
+ldap_unbind_ext_s(
+	LDAP *ld,
+	LDAPControl **sctrls,
+	LDAPControl **cctrls )
+{
+	return ldap_unbind_ext( ld, sctrls, cctrls );
+}
+
+int
+ldap_unbind( LDAP *ld )
+{
+	Debug0( LDAP_DEBUG_TRACE, "ldap_unbind\n" );
+
+	return( ldap_unbind_ext( ld, NULL, NULL ) );
+}
+
+
+int
+ldap_ld_free(
+	LDAP *ld,
+	int close,
+	LDAPControl **sctrls,
+	LDAPControl **cctrls )
+{
+	LDAPMessage	*lm, *next;
+	int		err = LDAP_SUCCESS;
+
+	LDAP_MUTEX_LOCK( &ld->ld_ldcmutex );
+	/* Someone else is still using this ld. */
+	if (ld->ld_ldcrefcnt > 1) {	/* but not last thread */
+		/* clean up self only */
+		ld->ld_ldcrefcnt--;
+		if ( ld->ld_error != NULL ) {
+			LDAP_FREE( ld->ld_error );
+			ld->ld_error = NULL;
+		}
+
+		if ( ld->ld_matched != NULL ) {
+			LDAP_FREE( ld->ld_matched );
+			ld->ld_matched = NULL;
+		}
+		if ( ld->ld_referrals != NULL) {
+			LDAP_VFREE(ld->ld_referrals);
+			ld->ld_referrals = NULL;
+		}
+		LDAP_MUTEX_UNLOCK( &ld->ld_ldcmutex );
+		LDAP_FREE( (char *) ld );
+		return( err );
+	}
+
+	/* This ld is the last thread. */
+	LDAP_MUTEX_UNLOCK( &ld->ld_ldcmutex );
+
+	/* free LDAP structure and outstanding requests/responses */
+	LDAP_MUTEX_LOCK( &ld->ld_req_mutex );
+	ldap_tavl_free( ld->ld_requests, ldap_do_free_request );
+	ld->ld_requests = NULL;
+	LDAP_MUTEX_UNLOCK( &ld->ld_req_mutex );
+	LDAP_MUTEX_LOCK( &ld->ld_conn_mutex );
+
+	/* free and unbind from all open connections */
+	while ( ld->ld_conns != NULL ) {
+		ldap_free_connection( ld, ld->ld_conns, 1, close );
+	}
+	LDAP_MUTEX_UNLOCK( &ld->ld_conn_mutex );
+	LDAP_MUTEX_LOCK( &ld->ld_res_mutex );
+	for ( lm = ld->ld_responses; lm != NULL; lm = next ) {
+		next = lm->lm_next;
+		ldap_msgfree( lm );
+	}
+
+	if ( ld->ld_abandoned != NULL ) {
+		LDAP_FREE( ld->ld_abandoned );
+		ld->ld_abandoned = NULL;
+	}
+	LDAP_MUTEX_UNLOCK( &ld->ld_res_mutex );
+
+	/* Should already be closed by ldap_free_connection which knows not to free
+	 * this one */
+	ber_int_sb_destroy( ld->ld_sb );
+	LBER_FREE( ld->ld_sb );
+
+	LDAP_MUTEX_LOCK( &ld->ld_ldopts_mutex );
+
+	/* final close callbacks */
+	{
+		ldaplist *ll, *next;
+
+		for ( ll = ld->ld_options.ldo_conn_cbs; ll; ll = next ) {
+			ldap_conncb *cb = ll->ll_data;
+			next = ll->ll_next;
+			cb->lc_del( ld, NULL, cb );
+			LDAP_FREE( ll );
+		}
+	}
+
+	if ( ld->ld_error != NULL ) {
+		LDAP_FREE( ld->ld_error );
+		ld->ld_error = NULL;
+	}
+
+	if ( ld->ld_matched != NULL ) {
+		LDAP_FREE( ld->ld_matched );
+		ld->ld_matched = NULL;
+	}
+
+	if ( ld->ld_referrals != NULL) {
+		LDAP_VFREE(ld->ld_referrals);
+		ld->ld_referrals = NULL;
+	}
+
+	if ( ld->ld_selectinfo != NULL ) {
+		ldap_free_select_info( ld->ld_selectinfo );
+		ld->ld_selectinfo = NULL;
+	}
+
+	if ( ld->ld_options.ldo_defludp != NULL ) {
+		ldap_free_urllist( ld->ld_options.ldo_defludp );
+		ld->ld_options.ldo_defludp = NULL;
+	}
+
+	if ( ld->ld_options.ldo_local_ip_addrs.local_ip_addrs ) {
+		LDAP_FREE( ld->ld_options.ldo_local_ip_addrs.local_ip_addrs );
+		memset( & ld->ld_options.ldo_local_ip_addrs, 0,
+			sizeof( ldapsourceip ) );
+	}
+
+#ifdef LDAP_CONNECTIONLESS
+	if ( ld->ld_options.ldo_peer != NULL ) {
+		LDAP_FREE( ld->ld_options.ldo_peer );
+		ld->ld_options.ldo_peer = NULL;
+	}
+
+	if ( ld->ld_options.ldo_cldapdn != NULL ) {
+		LDAP_FREE( ld->ld_options.ldo_cldapdn );
+		ld->ld_options.ldo_cldapdn = NULL;
+	}
+#endif
+
+	if ( ld->ld_options.ldo_defbase != NULL ) {
+		LDAP_FREE( ld->ld_options.ldo_defbase );
+		ld->ld_options.ldo_defbase = NULL;
+	}
+
+#ifdef HAVE_CYRUS_SASL
+	if ( ld->ld_options.ldo_def_sasl_mech != NULL ) {
+		LDAP_FREE( ld->ld_options.ldo_def_sasl_mech );
+		ld->ld_options.ldo_def_sasl_mech = NULL;
+	}
+
+	if ( ld->ld_options.ldo_def_sasl_realm != NULL ) {
+		LDAP_FREE( ld->ld_options.ldo_def_sasl_realm );
+		ld->ld_options.ldo_def_sasl_realm = NULL;
+	}
+
+	if ( ld->ld_options.ldo_def_sasl_authcid != NULL ) {
+		LDAP_FREE( ld->ld_options.ldo_def_sasl_authcid );
+		ld->ld_options.ldo_def_sasl_authcid = NULL;
+	}
+
+	if ( ld->ld_options.ldo_def_sasl_authzid != NULL ) {
+		LDAP_FREE( ld->ld_options.ldo_def_sasl_authzid );
+		ld->ld_options.ldo_def_sasl_authzid = NULL;
+	}
+#endif
+
+#ifdef HAVE_TLS
+	ldap_int_tls_destroy( &ld->ld_options );
+#endif
+
+	if ( ld->ld_options.ldo_sctrls != NULL ) {
+		ldap_controls_free( ld->ld_options.ldo_sctrls );
+		ld->ld_options.ldo_sctrls = NULL;
+	}
+
+	if ( ld->ld_options.ldo_cctrls != NULL ) {
+		ldap_controls_free( ld->ld_options.ldo_cctrls );
+		ld->ld_options.ldo_cctrls = NULL;
+	}
+	LDAP_MUTEX_UNLOCK( &ld->ld_ldopts_mutex );
+
+#ifdef LDAP_R_COMPILE
+	ldap_pvt_thread_mutex_destroy( &ld->ld_msgid_mutex );
+	ldap_pvt_thread_mutex_destroy( &ld->ld_conn_mutex );
+	ldap_pvt_thread_mutex_destroy( &ld->ld_req_mutex );
+	ldap_pvt_thread_mutex_destroy( &ld->ld_res_mutex );
+	ldap_pvt_thread_mutex_destroy( &ld->ld_abandon_mutex );
+	ldap_pvt_thread_mutex_destroy( &ld->ld_ldopts_mutex );
+	ldap_pvt_thread_mutex_destroy( &ld->ld_ldcmutex );
+#endif
+#ifndef NDEBUG
+	LDAP_TRASH(ld);
+#endif
+	LDAP_FREE( (char *) ld->ldc );
+	LDAP_FREE( (char *) ld );
+
+	return( err );
+}
+
+int
+ldap_destroy( LDAP *ld )
+{
+	return ( ldap_ld_free( ld, 1, NULL, NULL ) );
+}
+
+int
+ldap_unbind_s( LDAP *ld )
+{
+	return( ldap_unbind_ext( ld, NULL, NULL ) );
+}
+
+/* FIXME: this function is called only by ldap_free_connection(),
+ * which, most of the times, is called with ld_req_mutex locked */
+int
+ldap_send_unbind(
+	LDAP *ld,
+	Sockbuf *sb,
+	LDAPControl **sctrls,
+	LDAPControl **cctrls )
+{
+	BerElement	*ber;
+	ber_int_t	id;
+
+	Debug0( LDAP_DEBUG_TRACE, "ldap_send_unbind\n" );
+
+#ifdef LDAP_CONNECTIONLESS
+	if (LDAP_IS_UDP(ld))
+		return LDAP_SUCCESS;
+#endif
+	/* create a message to send */
+	if ( (ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
+		return( ld->ld_errno );
+	}
+
+	LDAP_NEXT_MSGID(ld, id);
+
+	/* fill it in */
+	if ( ber_printf( ber, "{itn" /*}*/, id,
+	    LDAP_REQ_UNBIND ) == -1 ) {
+		ld->ld_errno = LDAP_ENCODING_ERROR;
+		ber_free( ber, 1 );
+		return( ld->ld_errno );
+	}
+
+	/* Put Server Controls */
+	if( ldap_int_put_controls( ld, sctrls, ber ) != LDAP_SUCCESS ) {
+		ber_free( ber, 1 );
+		return ld->ld_errno;
+	}
+
+	if ( ber_printf( ber, /*{*/ "N}", LDAP_REQ_UNBIND ) == -1 ) {
+		ld->ld_errno = LDAP_ENCODING_ERROR;
+		ber_free( ber, 1 );
+		return( ld->ld_errno );
+	}
+
+	ld->ld_errno = LDAP_SUCCESS;
+	/* send the message */
+	if ( ber_flush2( sb, ber, LBER_FLUSH_FREE_ALWAYS ) == -1 ) {
+		ld->ld_errno = LDAP_SERVER_DOWN;
+	}
+
+	return( ld->ld_errno );
+}