source/libsmb/clioplock.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4    SMB client oplock functions
   5    Copyright (C) Andrew Tridgell 2001
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #define NO_SYSLOG
  23
  24 #include "includes.h"
  25
  26 /****************************************************************************
  27 send an ack for an oplock break request
  28 ****************************************************************************/
  29 BOOL cli_oplock_ack(struct cli_state *cli, int fnum, unsigned char level)
  30 {
  31         char *oldbuf = cli->outbuf;
  32         pstring buf;
  33         BOOL ret;
  34
  35         cli->outbuf = buf;
  36
  37         memset(buf,'\0',smb_size);
  38         set_message(buf,8,0,True);
  39
  40         SCVAL(buf,smb_com,SMBlockingX);
  41         SSVAL(buf,smb_tid, cli->cnum);
  42         cli_setup_packet(cli);
  43         SSVAL(buf,smb_vwv0,0xFF);
  44         SSVAL(buf,smb_vwv1,0);
  45         SSVAL(buf,smb_vwv2,fnum);
  46         if (level == 1)
  47                 SSVAL(buf,smb_vwv3,0x102); /* levelII oplock break ack */
  48         else
  49                 SSVAL(buf,smb_vwv3,2); /* exclusive oplock break ack */
  50         SIVAL(buf,smb_vwv4,0); /* timoeut */
  51         SSVAL(buf,smb_vwv6,0); /* unlockcount */
  52         SSVAL(buf,smb_vwv7,0); /* lockcount */
  53
  54         ret = cli_send_smb(cli);
  55
  56         cli->outbuf = oldbuf;
  57
  58         return ret;
  59 }
  60
  61
  62 /****************************************************************************
  63 set the oplock handler for a connection
  64 ****************************************************************************/
  65 void cli_oplock_handler(struct cli_state *cli,
  66                         BOOL (*handler)(struct cli_state *, int, unsigned char))
  67 {
  68         cli->oplock_handler = handler;
  69 }