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 3 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, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21
  22 /****************************************************************************
  23 send an ack for an oplock break request
  24 ****************************************************************************/
  25
  26 bool cli_oplock_ack(struct cli_state *cli, int fnum, unsigned char level)
  27 {
  28         char *oldbuf = cli->outbuf;
  29         char buf[smb_size+16];
  30         bool ret;
  31
  32         cli->outbuf = buf;
  33
  34         memset(buf,'\0',smb_size);
  35         cli_set_message(buf,8,0,True);
  36
  37         SCVAL(buf,smb_com,SMBlockingX);
  38         SSVAL(buf,smb_tid, cli->cnum);
  39         cli_setup_packet(cli);
  40         SSVAL(buf,smb_vwv0,0xFF);
  41         SSVAL(buf,smb_vwv1,0);
  42         SSVAL(buf,smb_vwv2,fnum);
  43         if (level == 1)
  44                 SSVAL(buf,smb_vwv3,0x102); /* levelII oplock break ack */
  45         else
  46                 SSVAL(buf,smb_vwv3,2); /* exclusive oplock break ack */
  47         SIVAL(buf,smb_vwv4,0); /* timoeut */
  48         SSVAL(buf,smb_vwv6,0); /* unlockcount */
  49         SSVAL(buf,smb_vwv7,0); /* lockcount */
  50
  51         ret = cli_send_smb(cli);
  52
  53         cli->outbuf = oldbuf;
  54
  55         return ret;
  56 }
  57
  58
  59 /****************************************************************************
  60 set the oplock handler for a connection
  61 ****************************************************************************/
  62 void cli_oplock_handler(struct cli_state *cli,
  63                         bool (*handler)(struct cli_state *, int, unsigned char))
  64 {
  65         cli->oplock_handler = handler;
  66 }