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271 lines
6.9 KiB
C
271 lines
6.9 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 1998-2022 The OpenLDAP Foundation.
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* Copyright 2006 Hans Leidekker
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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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#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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/* ---------------------------------------------------------------------------
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ldap_create_page_control_value
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Create and encode the value of the paged results control (RFC 2696).
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ld (IN) An LDAP session handle
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pagesize (IN) Page size requested
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cookie (IN) Opaque structure used by the server to track its
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location in the search results. NULL on the
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first call.
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value (OUT) Control value, SHOULD be freed by calling
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ldap_memfree() when done.
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pagedResultsControl ::= SEQUENCE {
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controlType 1.2.840.113556.1.4.319,
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criticality BOOLEAN DEFAULT FALSE,
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controlValue searchControlValue }
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searchControlValue ::= SEQUENCE {
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size INTEGER (0..maxInt),
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-- requested page size from client
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-- result set size estimate from server
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cookie OCTET STRING }
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---------------------------------------------------------------------------*/
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int
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ldap_create_page_control_value(
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LDAP *ld,
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ber_int_t pagesize,
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struct berval *cookie,
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struct berval *value )
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{
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BerElement *ber = NULL;
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ber_tag_t tag;
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struct berval null_cookie = { 0, NULL };
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if ( ld == NULL || value == NULL ||
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pagesize < 1 || pagesize > LDAP_MAXINT )
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{
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if ( ld )
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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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assert( LDAP_VALID( ld ) );
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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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if ( cookie == NULL ) {
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cookie = &null_cookie;
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}
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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, "{iO}", pagesize, cookie );
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if ( tag == LBER_ERROR ) {
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ld->ld_errno = LDAP_ENCODING_ERROR;
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goto done;
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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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done:;
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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_page_control
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Create and encode a page control.
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ld (IN) An LDAP session handle
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pagesize (IN) Page size requested
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cookie (IN) Opaque structure used by the server to track its
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location in the search results. NULL on the
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first call.
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value (OUT) Control value, SHOULD be freed by calling
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ldap_memfree() when done.
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iscritical (IN) Criticality
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ctrlp (OUT) LDAP control, SHOULD be freed by calling
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ldap_control_free() when done.
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pagedResultsControl ::= SEQUENCE {
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controlType 1.2.840.113556.1.4.319,
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criticality BOOLEAN DEFAULT FALSE,
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controlValue searchControlValue }
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searchControlValue ::= SEQUENCE {
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size INTEGER (0..maxInt),
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-- requested page size from client
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-- result set size estimate from server
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cookie OCTET STRING }
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---------------------------------------------------------------------------*/
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int
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ldap_create_page_control(
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LDAP *ld,
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ber_int_t pagesize,
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struct berval *cookie,
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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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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_page_control_value( ld,
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pagesize, cookie, &value );
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if ( ld->ld_errno == LDAP_SUCCESS ) {
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ld->ld_errno = ldap_control_create( LDAP_CONTROL_PAGEDRESULTS,
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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_pageresponse_control
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Decode a page control.
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ld (IN) An LDAP session handle
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ctrl (IN) The page response control
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count (OUT) The number of entries in the page.
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cookie (OUT) Opaque cookie. Use ldap_memfree() to
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free the bv_val member of this structure.
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---------------------------------------------------------------------------*/
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int
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ldap_parse_pageresponse_control(
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LDAP *ld,
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LDAPControl *ctrl,
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ber_int_t *countp,
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struct berval *cookie )
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{
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BerElement *ber;
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ber_tag_t tag;
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ber_int_t count;
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if ( ld == NULL || ctrl == NULL || cookie == NULL ) {
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if ( ld )
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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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/* 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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/* Extract the count and cookie from the control. */
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tag = ber_scanf( ber, "{io}", &count, cookie );
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ber_free( ber, 1 );
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if ( tag == LBER_ERROR ) {
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ld->ld_errno = LDAP_DECODING_ERROR;
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} else {
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ld->ld_errno = LDAP_SUCCESS;
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if ( countp != NULL ) {
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*countp = (unsigned long)count;
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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_page_control
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Decode a page control.
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ld (IN) An LDAP session handle
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ctrls (IN) Response controls
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count (OUT) The number of entries in the page.
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cookie (OUT) Opaque cookie. Use ldap_memfree() to
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free the bv_val member of this structure.
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---------------------------------------------------------------------------*/
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int
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ldap_parse_page_control(
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LDAP *ld,
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LDAPControl **ctrls,
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ber_int_t *countp,
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struct berval **cookiep )
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{
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LDAPControl *c;
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struct berval cookie;
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if ( cookiep == 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 ( ctrls == NULL ) {
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ld->ld_errno = LDAP_CONTROL_NOT_FOUND;
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return ld->ld_errno;
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}
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c = ldap_control_find( LDAP_CONTROL_PAGEDRESULTS, ctrls, NULL );
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if ( c == NULL ) {
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/* No page control was found. */
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ld->ld_errno = LDAP_CONTROL_NOT_FOUND;
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return ld->ld_errno;
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}
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ld->ld_errno = ldap_parse_pageresponse_control( ld, c, countp, &cookie );
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if ( ld->ld_errno == LDAP_SUCCESS ) {
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*cookiep = LDAP_MALLOC( sizeof( struct berval ) );
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if ( *cookiep == NULL ) {
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ld->ld_errno = LDAP_NO_MEMORY;
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} else {
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**cookiep = cookie;
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}
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}
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return ld->ld_errno;
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}
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