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-rw-r--r--libraries/libldap/vlvctrl.c361
1 files changed, 361 insertions, 0 deletions
diff --git a/libraries/libldap/vlvctrl.c b/libraries/libldap/vlvctrl.c
new file mode 100644
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--- /dev/null
+++ b/libraries/libldap/vlvctrl.c
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+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 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) 1999, 2000 Novell, Inc. All Rights Reserved.
+ *
+ * THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND
+ * TREATIES. USE, MODIFICATION, AND REDISTRIBUTION OF THIS WORK IS SUBJECT
+ * TO VERSION 2.0.1 OF THE OPENLDAP PUBLIC LICENSE, A COPY OF WHICH IS
+ * AVAILABLE AT HTTP://WWW.OPENLDAP.ORG/LICENSE.HTML OR IN THE FILE "LICENSE"
+ * IN THE TOP-LEVEL DIRECTORY OF THE DISTRIBUTION. ANY USE OR EXPLOITATION
+ * OF THIS WORK OTHER THAN AS AUTHORIZED IN VERSION 2.0.1 OF THE OPENLDAP
+ * PUBLIC LICENSE, OR OTHER PRIOR WRITTEN CONSENT FROM NOVELL, COULD SUBJECT
+ * THE PERPETRATOR TO CRIMINAL AND CIVIL LIABILITY.
+ *---
+ * Note: A verbatim copy of version 2.0.1 of the OpenLDAP Public License
+ * can be found in the file "build/LICENSE-2.0.1" in this distribution
+ * of OpenLDAP Software.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/stdlib.h>
+#include <ac/string.h>
+#include <ac/time.h>
+
+#include "ldap-int.h"
+
+#define LDAP_VLVBYINDEX_IDENTIFIER 0xa0L
+#define LDAP_VLVBYVALUE_IDENTIFIER 0x81L
+#define LDAP_VLVCONTEXT_IDENTIFIER 0x04L
+
+
+/*---
+ ldap_create_vlv_control
+
+ Create and encode the Virtual List View control.
+
+ ld (IN) An LDAP session handle.
+
+ vlvinfop (IN) The address of an LDAPVLVInfo structure whose contents
+ are used to construct the value of the control
+ that is created.
+
+ value (OUT) A struct berval that contains the value to be assigned to the ldctl_value member
+ of an LDAPControl structure that contains the
+ VirtualListViewRequest control.
+ The bv_val member of the berval structure
+ SHOULD be freed when it is no longer in use by
+ calling ldap_memfree().
+
+
+ Ber encoding
+
+ VirtualListViewRequest ::= SEQUENCE {
+ beforeCount INTEGER (0 .. maxInt),
+ afterCount INTEGER (0 .. maxInt),
+ CHOICE {
+ byoffset [0] SEQUENCE, {
+ offset INTEGER (0 .. maxInt),
+ contentCount INTEGER (0 .. maxInt) }
+ [1] greaterThanOrEqual assertionValue }
+ contextID OCTET STRING OPTIONAL }
+
+
+ Note: The first time the VLV control is created, the ldvlv_context
+ field of the LDAPVLVInfo structure should be set to NULL.
+ The context obtained from calling ldap_parse_vlv_control()
+ should be used as the context in the next ldap_create_vlv_control
+ call.
+
+ ---*/
+
+int
+ldap_create_vlv_control_value(
+ LDAP *ld,
+ LDAPVLVInfo *vlvinfop,
+ struct berval *value )
+{
+ ber_tag_t tag;
+ BerElement *ber;
+
+ if ( ld == NULL || vlvinfop == NULL || value == NULL ) {
+ if ( ld )
+ ld->ld_errno = LDAP_PARAM_ERROR;
+ return LDAP_PARAM_ERROR;
+ }
+
+ assert( LDAP_VALID( ld ) );
+
+ value->bv_val = NULL;
+ value->bv_len = 0;
+ ld->ld_errno = LDAP_SUCCESS;
+
+ ber = ldap_alloc_ber_with_options( ld );
+ if ( ber == NULL ) {
+ ld->ld_errno = LDAP_NO_MEMORY;
+ return ld->ld_errno;
+ }
+
+ tag = ber_printf( ber, "{ii" /*}*/,
+ vlvinfop->ldvlv_before_count,
+ vlvinfop->ldvlv_after_count );
+ if ( tag == LBER_ERROR ) {
+ goto error_return;
+ }
+
+ if ( vlvinfop->ldvlv_attrvalue == NULL ) {
+ tag = ber_printf( ber, "t{iiN}",
+ LDAP_VLVBYINDEX_IDENTIFIER,
+ vlvinfop->ldvlv_offset,
+ vlvinfop->ldvlv_count );
+ if ( tag == LBER_ERROR ) {
+ goto error_return;
+ }
+
+ } else {
+ tag = ber_printf( ber, "tO",
+ LDAP_VLVBYVALUE_IDENTIFIER,
+ vlvinfop->ldvlv_attrvalue );
+ if ( tag == LBER_ERROR ) {
+ goto error_return;
+ }
+ }
+
+ if ( vlvinfop->ldvlv_context ) {
+ tag = ber_printf( ber, "tO",
+ LDAP_VLVCONTEXT_IDENTIFIER,
+ vlvinfop->ldvlv_context );
+ if ( tag == LBER_ERROR ) {
+ goto error_return;
+ }
+ }
+
+ tag = ber_printf( ber, /*{*/ "N}" );
+ if ( tag == LBER_ERROR ) {
+ goto error_return;
+ }
+
+ if ( ber_flatten2( ber, value, 1 ) == -1 ) {
+ ld->ld_errno = LDAP_NO_MEMORY;
+ }
+
+ if ( 0 ) {
+error_return:;
+ ld->ld_errno = LDAP_ENCODING_ERROR;
+ }
+
+ if ( ber != NULL ) {
+ ber_free( ber, 1 );
+ }
+
+ return ld->ld_errno;
+}
+
+/*---
+ ldap_create_vlv_control
+
+ Create and encode the Virtual List View control.
+
+ ld (IN) An LDAP session handle.
+
+ vlvinfop (IN) The address of an LDAPVLVInfo structure whose contents
+ are used to construct the value of the control
+ that is created.
+
+ ctrlp (OUT) A result parameter that will be assigned the address
+ of an LDAPControl structure that contains the
+ VirtualListViewRequest control created by this function.
+ The memory occupied by the LDAPControl structure
+ SHOULD be freed when it is no longer in use by
+ calling ldap_control_free().
+
+
+ Ber encoding
+
+ VirtualListViewRequest ::= SEQUENCE {
+ beforeCount INTEGER (0 .. maxInt),
+ afterCount INTEGER (0 .. maxInt),
+ CHOICE {
+ byoffset [0] SEQUENCE, {
+ offset INTEGER (0 .. maxInt),
+ contentCount INTEGER (0 .. maxInt) }
+ [1] greaterThanOrEqual assertionValue }
+ contextID OCTET STRING OPTIONAL }
+
+
+ Note: The first time the VLV control is created, the ldvlv_context
+ field of the LDAPVLVInfo structure should be set to NULL.
+ The context obtained from calling ldap_parse_vlv_control()
+ should be used as the context in the next ldap_create_vlv_control
+ call.
+
+ ---*/
+
+int
+ldap_create_vlv_control(
+ LDAP *ld,
+ LDAPVLVInfo *vlvinfop,
+ LDAPControl **ctrlp )
+{
+ struct berval value;
+
+ if ( ctrlp == NULL ) {
+ ld->ld_errno = LDAP_PARAM_ERROR;
+ return ld->ld_errno;
+ }
+
+ ld->ld_errno = ldap_create_vlv_control_value( ld, vlvinfop, &value );
+ if ( ld->ld_errno == LDAP_SUCCESS ) {
+
+ ld->ld_errno = ldap_control_create( LDAP_CONTROL_VLVREQUEST,
+ 1, &value, 0, ctrlp );
+ if ( ld->ld_errno != LDAP_SUCCESS ) {
+ LDAP_FREE( value.bv_val );
+ }
+ }
+
+ return ld->ld_errno;
+}
+
+
+/*---
+ ldap_parse_vlvresponse_control
+
+ Decode the Virtual List View control return information.
+
+ ld (IN) An LDAP session handle.
+
+ ctrl (IN) The address of the LDAPControl structure.
+
+ target_posp (OUT) This result parameter is filled in with the list
+ index of the target entry. If this parameter is
+ NULL, the target position is not returned.
+
+ list_countp (OUT) This result parameter is filled in with the server's
+ estimate of the size of the list. If this parameter
+ is NULL, the size is not returned.
+
+ contextp (OUT) This result parameter is filled in with the address
+ of a struct berval that contains the server-
+ generated context identifier if one was returned by
+ the server. If the server did not return a context
+ identifier, this parameter will be set to NULL, even
+ if an error occured.
+ The returned context SHOULD be used in the next call
+ to create a VLV sort control. The struct berval
+ returned SHOULD be disposed of by calling ber_bvfree()
+ when it is no longer needed. If NULL is passed for
+ contextp, the context identifier is not returned.
+
+ errcodep (OUT) This result parameter is filled in with the VLV
+ result code. If this parameter is NULL, the result
+ code is not returned.
+
+
+ Ber encoding
+
+ VirtualListViewResponse ::= SEQUENCE {
+ targetPosition INTEGER (0 .. maxInt),
+ contentCount INTEGER (0 .. maxInt),
+ virtualListViewResult ENUMERATED {
+ success (0),
+ operatonsError (1),
+ unwillingToPerform (53),
+ insufficientAccessRights (50),
+ busy (51),
+ timeLimitExceeded (3),
+ adminLimitExceeded (11),
+ sortControlMissing (60),
+ offsetRangeError (61),
+ other (80) },
+ contextID OCTET STRING OPTIONAL }
+
+---*/
+
+int
+ldap_parse_vlvresponse_control(
+ LDAP *ld,
+ LDAPControl *ctrl,
+ ber_int_t *target_posp,
+ ber_int_t *list_countp,
+ struct berval **contextp,
+ ber_int_t *errcodep )
+{
+ BerElement *ber;
+ ber_int_t pos, count, err;
+ ber_tag_t tag, berTag;
+ ber_len_t berLen;
+
+ assert( ld != NULL );
+ assert( LDAP_VALID( ld ) );
+
+ if (contextp) {
+ *contextp = NULL; /* Make sure we return a NULL if error occurs. */
+ }
+
+ if (ctrl == NULL) {
+ ld->ld_errno = LDAP_PARAM_ERROR;
+ return(ld->ld_errno);
+ }
+
+ if (strcmp(LDAP_CONTROL_VLVRESPONSE, ctrl->ldctl_oid) != 0) {
+ /* Not VLV Response control */
+ ld->ld_errno = LDAP_CONTROL_NOT_FOUND;
+ return(ld->ld_errno);
+ }
+
+ /* Create a BerElement from the berval returned in the control. */
+ ber = ber_init(&ctrl->ldctl_value);
+
+ if (ber == NULL) {
+ ld->ld_errno = LDAP_NO_MEMORY;
+ return(ld->ld_errno);
+ }
+
+ /* Extract the data returned in the control. */
+ tag = ber_scanf(ber, "{iie" /*}*/, &pos, &count, &err);
+
+ if( tag == LBER_ERROR) {
+ ber_free(ber, 1);
+ ld->ld_errno = LDAP_DECODING_ERROR;
+ return(ld->ld_errno);
+ }
+
+
+ /* Since the context is the last item encoded, if caller doesn't want
+ it returned, don't decode it. */
+ if (contextp) {
+ if (LDAP_VLVCONTEXT_IDENTIFIER == ber_peek_tag(ber, &berLen)) {
+ tag = ber_scanf(ber, "tO", &berTag, contextp);
+
+ if( tag == LBER_ERROR) {
+ ber_free(ber, 1);
+ ld->ld_errno = LDAP_DECODING_ERROR;
+ return(ld->ld_errno);
+ }
+ }
+ }
+
+ ber_free(ber, 1);
+
+ /* Return data to the caller for items that were requested. */
+ if (target_posp) *target_posp = pos;
+ if (list_countp) *list_countp = count;
+ if (errcodep) *errcodep = err;
+
+ ld->ld_errno = LDAP_SUCCESS;
+ return(ld->ld_errno);
+}
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