git.sur5r.net Git - openldap/blob - servers/slapd/cancel.c

   1 /* $OpenLDAP$ */
   2 /* cancel.c - LDAP cancel extended operation */
   3 /*
   4  * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11
  12 #include <ac/krb.h>
  13 #include <ac/socket.h>
  14 #include <ac/string.h>
  15 #include <ac/unistd.h>
  16
  17 #include "slap.h"
  18
  19 #include <lber_pvt.h>
  20 #include <lutil.h>
  21
  22 int cancel_extop(
  23         Connection *conn,
  24         Operation *op,
  25         const char *reqoid,
  26         struct berval *reqdata,
  27         char **rspoid,
  28         struct berval **rspdata,
  29         LDAPControl ***rspctrls,
  30         const char **text,
  31         BerVarray *refs )
  32 {
  33         Backend *be;
  34         int rc;
  35         int found = 0;
  36         int opid;
  37         BerElement *ber;
  38
  39         assert( reqoid != NULL );
  40         assert( strcmp( LDAP_EXOP_X_CANCEL, reqoid ) == 0 );
  41
  42         if ( reqdata == NULL ) {
  43                 *text = "no message ID supplied";
  44                 return LDAP_PROTOCOL_ERROR;
  45         }
  46
  47         ber = ber_init( reqdata );
  48         if ( ber == NULL ) {
  49                 *text = "internal error";
  50                 return LDAP_OTHER;
  51         }
  52
  53         if ( ber_scanf( ber, "{i}", &opid ) == LBER_ERROR ) {
  54                 *text = "message ID parse failed";
  55                 return LDAP_PROTOCOL_ERROR;
  56         }
  57
  58         (void) ber_free( ber, 1 );
  59
  60         if ( opid < 0 ) {
  61                 *text = "message ID invalid";
  62                 return LDAP_PROTOCOL_ERROR;
  63         }
  64
  65         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
  66         LDAP_STAILQ_FOREACH( op, &conn->c_pending_ops, o_next ) {
  67                 if ( op->o_msgid == opid ) {
  68                         LDAP_STAILQ_REMOVE( &conn->c_pending_ops, op, slap_op, o_next );
  69                         slap_op_free( op );
  70                         found = 1;
  71                         break;
  72                 }
  73         }
  74         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
  75
  76         if ( found )
  77                 return LDAP_SUCCESS;
  78
  79         found = 0;
  80         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
  81         LDAP_STAILQ_FOREACH( op, &conn->c_ops, o_next ) {
  82                 if ( op->o_msgid == opid ) {
  83                         found = 1;
  84                         break;
  85                 }
  86         }
  87
  88         if ( !found ) {
  89                 *text = "message ID not found";
  90                 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
  91                 return LDAP_NO_SUCH_OPERATION;
  92         }
  93
  94         if ( op->o_cancel != LDAP_CANCEL_NONE ) {
  95                 *text = "message ID already being cancelled";
  96                 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
  97                 return LDAP_PROTOCOL_ERROR;
  98         }
  99
 100         op->o_cancel = LDAP_CANCEL_REQ;
 101         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
 102
 103         while ( op->o_cancel == LDAP_CANCEL_REQ ) {
 104                 ldap_pvt_thread_yield();
 105         }
 106
 107         if ( op->o_cancel == LDAP_CANCEL_ACK ) {
 108                 rc = LDAP_SUCCESS;
 109         } else {
 110                 rc = op->o_cancel;
 111         }
 112
 113         op->o_cancel = LDAP_CANCEL_DONE;
 114
 115         return rc;
 116 }