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-rw-r--r--libraries/libldap/pagectrl.c271
1 files changed, 271 insertions, 0 deletions
diff --git a/libraries/libldap/pagectrl.c b/libraries/libldap/pagectrl.c
new file mode 100644
index 0000000..c7a1499
--- /dev/null
+++ b/libraries/libldap/pagectrl.c
@@ -0,0 +1,271 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2022 The OpenLDAP Foundation.
+ * Copyright 2006 Hans Leidekker
+ * 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>.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/stdlib.h>
+#include <ac/string.h>
+#include <ac/time.h>
+
+#include "ldap-int.h"
+
+/* ---------------------------------------------------------------------------
+ ldap_create_page_control_value
+
+ Create and encode the value of the paged results control (RFC 2696).
+
+ ld (IN) An LDAP session handle
+ pagesize (IN) Page size requested
+ cookie (IN) Opaque structure used by the server to track its
+ location in the search results. NULL on the
+ first call.
+ value (OUT) Control value, SHOULD be freed by calling
+ ldap_memfree() when done.
+
+ pagedResultsControl ::= SEQUENCE {
+ controlType 1.2.840.113556.1.4.319,
+ criticality BOOLEAN DEFAULT FALSE,
+ controlValue searchControlValue }
+
+ searchControlValue ::= SEQUENCE {
+ size INTEGER (0..maxInt),
+ -- requested page size from client
+ -- result set size estimate from server
+ cookie OCTET STRING }
+
+ ---------------------------------------------------------------------------*/
+
+int
+ldap_create_page_control_value(
+ LDAP *ld,
+ ber_int_t pagesize,
+ struct berval *cookie,
+ struct berval *value )
+{
+ BerElement *ber = NULL;
+ ber_tag_t tag;
+ struct berval null_cookie = { 0, NULL };
+
+ if ( ld == NULL || value == NULL ||
+ pagesize < 1 || pagesize > LDAP_MAXINT )
+ {
+ 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;
+
+ if ( cookie == NULL ) {
+ cookie = &null_cookie;
+ }
+
+ ber = ldap_alloc_ber_with_options( ld );
+ if ( ber == NULL ) {
+ ld->ld_errno = LDAP_NO_MEMORY;
+ return ld->ld_errno;
+ }
+
+ tag = ber_printf( ber, "{iO}", pagesize, cookie );
+ if ( tag == LBER_ERROR ) {
+ ld->ld_errno = LDAP_ENCODING_ERROR;
+ goto done;
+ }
+
+ if ( ber_flatten2( ber, value, 1 ) == -1 ) {
+ ld->ld_errno = LDAP_NO_MEMORY;
+ }
+
+done:;
+ if ( ber != NULL ) {
+ ber_free( ber, 1 );
+ }
+
+ return ld->ld_errno;
+}
+
+
+/* ---------------------------------------------------------------------------
+ ldap_create_page_control
+
+ Create and encode a page control.
+
+ ld (IN) An LDAP session handle
+ pagesize (IN) Page size requested
+ cookie (IN) Opaque structure used by the server to track its
+ location in the search results. NULL on the
+ first call.
+ value (OUT) Control value, SHOULD be freed by calling
+ ldap_memfree() when done.
+ iscritical (IN) Criticality
+ ctrlp (OUT) LDAP control, SHOULD be freed by calling
+ ldap_control_free() when done.
+
+ pagedResultsControl ::= SEQUENCE {
+ controlType 1.2.840.113556.1.4.319,
+ criticality BOOLEAN DEFAULT FALSE,
+ controlValue searchControlValue }
+
+ searchControlValue ::= SEQUENCE {
+ size INTEGER (0..maxInt),
+ -- requested page size from client
+ -- result set size estimate from server
+ cookie OCTET STRING }
+
+ ---------------------------------------------------------------------------*/
+
+int
+ldap_create_page_control(
+ LDAP *ld,
+ ber_int_t pagesize,
+ struct berval *cookie,
+ int iscritical,
+ LDAPControl **ctrlp )
+{
+ struct berval value;
+
+ if ( ctrlp == NULL ) {
+ ld->ld_errno = LDAP_PARAM_ERROR;
+ return ld->ld_errno;
+ }
+
+ ld->ld_errno = ldap_create_page_control_value( ld,
+ pagesize, cookie, &value );
+ if ( ld->ld_errno == LDAP_SUCCESS ) {
+ ld->ld_errno = ldap_control_create( LDAP_CONTROL_PAGEDRESULTS,
+ iscritical, &value, 0, ctrlp );
+ if ( ld->ld_errno != LDAP_SUCCESS ) {
+ LDAP_FREE( value.bv_val );
+ }
+ }
+
+ return ld->ld_errno;
+}
+
+
+/* ---------------------------------------------------------------------------
+ ldap_parse_pageresponse_control
+
+ Decode a page control.
+
+ ld (IN) An LDAP session handle
+ ctrl (IN) The page response control
+ count (OUT) The number of entries in the page.
+ cookie (OUT) Opaque cookie. Use ldap_memfree() to
+ free the bv_val member of this structure.
+
+ ---------------------------------------------------------------------------*/
+
+int
+ldap_parse_pageresponse_control(
+ LDAP *ld,
+ LDAPControl *ctrl,
+ ber_int_t *countp,
+ struct berval *cookie )
+{
+ BerElement *ber;
+ ber_tag_t tag;
+ ber_int_t count;
+
+ if ( ld == NULL || ctrl == NULL || cookie == NULL ) {
+ if ( ld )
+ ld->ld_errno = LDAP_PARAM_ERROR;
+ return LDAP_PARAM_ERROR;
+ }
+
+ /* 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 count and cookie from the control. */
+ tag = ber_scanf( ber, "{io}", &count, cookie );
+ ber_free( ber, 1 );
+
+ if ( tag == LBER_ERROR ) {
+ ld->ld_errno = LDAP_DECODING_ERROR;
+ } else {
+ ld->ld_errno = LDAP_SUCCESS;
+
+ if ( countp != NULL ) {
+ *countp = (unsigned long)count;
+ }
+ }
+
+ return ld->ld_errno;
+}
+
+/* ---------------------------------------------------------------------------
+ ldap_parse_page_control
+
+ Decode a page control.
+
+ ld (IN) An LDAP session handle
+ ctrls (IN) Response controls
+ count (OUT) The number of entries in the page.
+ cookie (OUT) Opaque cookie. Use ldap_memfree() to
+ free the bv_val member of this structure.
+
+ ---------------------------------------------------------------------------*/
+
+int
+ldap_parse_page_control(
+ LDAP *ld,
+ LDAPControl **ctrls,
+ ber_int_t *countp,
+ struct berval **cookiep )
+{
+ LDAPControl *c;
+ struct berval cookie;
+
+ if ( cookiep == NULL ) {
+ ld->ld_errno = LDAP_PARAM_ERROR;
+ return ld->ld_errno;
+ }
+
+ if ( ctrls == NULL ) {
+ ld->ld_errno = LDAP_CONTROL_NOT_FOUND;
+ return ld->ld_errno;
+ }
+
+ c = ldap_control_find( LDAP_CONTROL_PAGEDRESULTS, ctrls, NULL );
+ if ( c == NULL ) {
+ /* No page control was found. */
+ ld->ld_errno = LDAP_CONTROL_NOT_FOUND;
+ return ld->ld_errno;
+ }
+
+ ld->ld_errno = ldap_parse_pageresponse_control( ld, c, countp, &cookie );
+ if ( ld->ld_errno == LDAP_SUCCESS ) {
+ *cookiep = LDAP_MALLOC( sizeof( struct berval ) );
+ if ( *cookiep == NULL ) {
+ ld->ld_errno = LDAP_NO_MEMORY;
+ } else {
+ **cookiep = cookie;
+ }
+ }
+
+ return ld->ld_errno;
+}
+
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