source/libsmb/clioplock.c

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