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349 lines
10 KiB
C
349 lines
10 KiB
C
/* $OpenLDAP$ */
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/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
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*
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* Copyright 1998-2020 The OpenLDAP Foundation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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/* ACKNOWLEDGEMENTS:
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* This work was developed by Howard Chu for inclusion in
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* OpenLDAP Software.
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/stdlib.h>
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#include <ac/string.h>
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#include <ac/time.h>
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#include "ldap-int.h"
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/* Based on draft-ietf-ldapext-c-api-psearch-00 */
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/* ---------------------------------------------------------------------------
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ldap_create_persistentsearch_control_value
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Create and encode the value of the server-side sort control.
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ld (IN) An LDAP session handle, as obtained from a call to
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ldap_init().
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changetypes (IN) A bit-sensitive field that indicates which kinds of
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changes the client wants to be informed about. Its
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value should be LDAP_CHANGETYPE_ANY, or any logical-OR
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combination of LDAP_CHANGETYPE_ADD,
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LDAP_CHANGETYPE_DELETE, LDAP_CHANGETYPE_MODIFY, and
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LDAP_CHANGETYPE_MODDN. This field corresponds to the
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changeType element of the BER-encoded PersistentSearch
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control value itself.
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changesonly (IN) A Boolean field that indicates whether the client
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wishes to only receive searchResultEntry messages for
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entries that have been changed. If non-zero, only
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entries that result from changes are returned; other-
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wise, all of the static entries that match the search
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criteria are returned before the server begins change
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notification. This field corresponds to the changes-
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Only element of the BER-encoded PersistentSearch con-
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trol value itself.
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return_echg_ctls (IN) A Boolean field that indicates whether the server
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should send back an Entry Change Notification control
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with each searchResultEntry that is returned due to a
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change to an entry. If non-zero, Entry Change
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Notification controls are requested; if zero, they are
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not. This field corresponds to the returnECs element
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of the BER-encoded PersistentSearch control value
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itself.
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value (OUT) Contains the control value; the bv_val member of the berval structure
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SHOULD be freed by calling ldap_memfree() when done.
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---------------------------------------------------------------------------*/
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int
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ldap_create_persistentsearch_control_value(
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LDAP *ld,
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int changetypes,
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int changesonly,
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int return_echg_ctls,
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struct berval *value )
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{
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int i;
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BerElement *ber = NULL;
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ber_tag_t tag;
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assert( ld != NULL );
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assert( LDAP_VALID( ld ) );
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if ( ld == NULL ) return LDAP_PARAM_ERROR;
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if ( value == NULL ) {
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ld->ld_errno = LDAP_PARAM_ERROR;
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return LDAP_PARAM_ERROR;
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}
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if (( changetypes & 0x0f ) != changetypes ) {
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ld->ld_errno = LDAP_PARAM_ERROR;
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return LDAP_PARAM_ERROR;
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}
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value->bv_val = NULL;
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value->bv_len = 0;
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ld->ld_errno = LDAP_SUCCESS;
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ber = ldap_alloc_ber_with_options( ld );
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if ( ber == NULL) {
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ld->ld_errno = LDAP_NO_MEMORY;
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return ld->ld_errno;
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}
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tag = ber_printf( ber, "{ibb}", changetypes, changesonly, return_echg_ctls );
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if ( tag == LBER_ERROR ) {
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goto error_return;
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}
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if ( ber_flatten2( ber, value, 1 ) == -1 ) {
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ld->ld_errno = LDAP_NO_MEMORY;
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}
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if ( 0 ) {
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error_return:;
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ld->ld_errno = LDAP_ENCODING_ERROR;
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}
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if ( ber != NULL ) {
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ber_free( ber, 1 );
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}
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return ld->ld_errno;
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}
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/* ---------------------------------------------------------------------------
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ldap_create_persistentsearch_control
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Create and encode the persistent search control.
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ld (IN) An LDAP session handle, as obtained from a call to
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ldap_init().
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changetypes (IN) A bit-sensitive field that indicates which kinds of
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changes the client wants to be informed about. Its
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value should be LDAP_CHANGETYPE_ANY, or any logical-OR
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combination of LDAP_CHANGETYPE_ADD,
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LDAP_CHANGETYPE_DELETE, LDAP_CHANGETYPE_MODIFY, and
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LDAP_CHANGETYPE_MODDN. This field corresponds to the
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changeType element of the BER-encoded PersistentSearch
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control value itself.
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changesonly (IN) A Boolean field that indicates whether the client
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wishes to only receive searchResultEntry messages for
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entries that have been changed. If non-zero, only
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entries that result from changes are returned; other-
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wise, all of the static entries that match the search
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criteria are returned before the server begins change
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notification. This field corresponds to the changes-
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Only element of the BER-encoded PersistentSearch con-
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trol value itself.
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return_echg_ctls (IN) A Boolean field that indicates whether the server
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should send back an Entry Change Notification control
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with each searchResultEntry that is returned due to a
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change to an entry. If non-zero, Entry Change
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Notification controls are requested; if zero, they are
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not. This field corresponds to the returnECs element
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of the BER-encoded PersistentSearch control value
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itself.
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isCritical (IN) 0 - Indicates the control is not critical to the operation.
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non-zero - The control is critical to the operation.
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ctrlp (OUT) Returns a pointer to the LDAPControl created. This control
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SHOULD be freed by calling ldap_control_free() when done.
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---------------------------------------------------------------------------*/
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int
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ldap_create_persistentsearch_control(
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LDAP *ld,
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int changetypes,
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int changesonly,
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int return_echg_ctls,
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int isCritical,
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LDAPControl **ctrlp )
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{
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struct berval value;
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assert( ld != NULL );
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assert( LDAP_VALID( ld ) );
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if ( ld == NULL ) {
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return LDAP_PARAM_ERROR;
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}
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if ( ctrlp == NULL ) {
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ld->ld_errno = LDAP_PARAM_ERROR;
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return ld->ld_errno;
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}
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ld->ld_errno = ldap_create_persistentsearch_control_value( ld, changetypes, changesonly, return_echg_ctls, &value );
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if ( ld->ld_errno == LDAP_SUCCESS ) {
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ld->ld_errno = ldap_control_create( LDAP_CONTROL_PERSIST_REQUEST,
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isCritical, &value, 0, ctrlp );
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if ( ld->ld_errno != LDAP_SUCCESS ) {
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LDAP_FREE( value.bv_val );
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}
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}
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return ld->ld_errno;
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}
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/* ---------------------------------------------------------------------------
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ldap_parse_entrychange_control
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Decode the entry change notification control return information.
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ld (IN) An LDAP session handle, as obtained from a call to
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ldap_init().
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ctrl (IN) The address of the LDAP Control Structure.
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chgtypep (OUT) This result parameter is filled in with one of the
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following values to indicate the type of change that was
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made that caused the entry to be returned:
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LDAP_CONTROL_PERSIST_ENTRY_CHANGE_ADD (1),
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LDAP_CONTROL_PERSIST_ENTRY_CHANGE_DELETE (2),
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LDAP_CONTROL_PERSIST_ENTRY_CHANGE_MODIFY (4), or
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LDAP_CONTROL_PERSIST_ENTRY_CHANGE_RENAME (8).
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If this parameter is NULL, the change type information
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is not returned.
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prevdnp (OUT) This result parameter points to the DN the
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entry had before it was renamed and/or moved by a
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modifyDN operation. It is set to NULL for other types
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of changes. If this parameter is NULL, the previous DN
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information is not returned. The returned value is a
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pointer to the contents of the control; it is not a
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copy of the data.
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chgnumpresentp (OUT) This result parameter is filled in with a non-zero
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value if a change number was returned in the control
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(the change number is optional and servers MAY choose
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not to return it). If this parameter is NULL, no indication
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of whether the change number was present is returned.
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chgnump (OUT) This result paramter is filled in with the change number
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if one was returned in the control. If this parameter
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is NULL, the change number is not returned.
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---------------------------------------------------------------------------*/
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int
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ldap_parse_entrychange_control(
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LDAP *ld,
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LDAPControl *ctrl,
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int *chgtypep,
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struct berval *prevdnp,
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int *chgnumpresentp,
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long *chgnump )
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{
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BerElement *ber;
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ber_tag_t tag, berTag;
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ber_len_t berLen;
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ber_int_t chgtype;
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assert( ld != NULL );
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assert( LDAP_VALID( ld ) );
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assert( ctrl != NULL );
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if (ld == NULL) {
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return LDAP_PARAM_ERROR;
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}
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if (ctrl == NULL) {
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ld->ld_errno = LDAP_PARAM_ERROR;
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return(ld->ld_errno);
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}
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if ( !ctrl->ldctl_value.bv_val ) {
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ld->ld_errno = LDAP_DECODING_ERROR;
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return(ld->ld_errno);
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}
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/* Create a BerElement from the berval returned in the control. */
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ber = ber_init(&ctrl->ldctl_value);
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if (ber == NULL) {
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ld->ld_errno = LDAP_NO_MEMORY;
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return(ld->ld_errno);
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}
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if ( prevdnp != NULL ) {
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BER_BVZERO( prevdnp );
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}
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if ( chgnumpresentp != NULL )
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*chgnumpresentp = 0;
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if ( chgnump != NULL )
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*chgnump = 0;
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/* Extract the change type from the control. */
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tag = ber_scanf(ber, "{e" /*}*/, &chgtype);
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if( tag != LBER_ENUMERATED ) {
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ber_free(ber, 1);
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ld->ld_errno = LDAP_DECODING_ERROR;
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return(ld->ld_errno);
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}
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if ( chgtypep != NULL )
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*chgtypep = chgtype;
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tag = ber_peek_tag( ber, &berLen );
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if ( berLen ) {
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if (tag == LBER_OCTETSTRING) {
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if (prevdnp != NULL) {
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tag = ber_get_stringbv( ber, prevdnp, 0 );
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} else {
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struct berval bv;
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tag = ber_skip_element( ber, &bv );
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}
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if ( tag == LBER_ERROR ) {
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ber_free(ber, 1);
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ld->ld_errno = LDAP_DECODING_ERROR;
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return(ld->ld_errno);
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}
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tag = ber_peek_tag( ber, &berLen );
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}
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if ( chgnumpresentp != NULL || chgnump != NULL ) {
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ber_int_t chgnum = 0;
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int present = 0;
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if (tag == LBER_INTEGER) {
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present = 1;
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tag = ber_get_int( ber, &chgnum );
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if ( tag == LBER_ERROR ) {
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ber_free(ber, 1);
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ld->ld_errno = LDAP_DECODING_ERROR;
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return(ld->ld_errno);
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}
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if ( chgnumpresentp != NULL )
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*chgnumpresentp = present;
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if ( chgnump != NULL )
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*chgnump = chgnum;
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}
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}
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}
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ber_free(ber,1);
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ld->ld_errno = LDAP_SUCCESS;
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return(ld->ld_errno);
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}
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