source4/libcli/smb2/cancel.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    SMB2 client notify calls
   5
   6    Copyright (C) Stefan Metzmacher 2006
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24 #include "libcli/raw/libcliraw.h"
  25 #include "libcli/smb2/smb2.h"
  26 #include "libcli/smb2/smb2_calls.h"
  27
  28 /*
  29   send a cancel request
  30 */
  31 NTSTATUS smb2_cancel(struct smb2_request *r)
  32 {
  33         NTSTATUS status;
  34         struct smb2_request *c;
  35         uint32_t old_timeout;
  36         uint64_t old_seqnum;
  37
  38         /*
  39          * if we don't get a pending id yet, we just
  40          * mark the request for pending, so that we directly
  41          * send the cancel after getting the pending id
  42          */
  43         if (!r->cancel.can_cancel) {
  44                 r->cancel.do_cancel++;
  45                 return NT_STATUS_OK;
  46         }
  47
  48         /* we don't want a seqmun for a SMB2 Cancel */
  49         old_seqnum = r->transport->seqnum;
  50         c = smb2_request_init(r->transport, SMB2_OP_CANCEL, 0x04, False, 0);
  51         r->transport->seqnum = old_seqnum;
  52         NT_STATUS_HAVE_NO_MEMORY(c);
  53         c->seqnum = 0;
  54
  55         SIVAL(c->out.hdr, SMB2_HDR_FLAGS,       0x00000002);
  56         SSVAL(c->out.hdr, SMB2_HDR_UNKNOWN1,    0x0030);
  57         SIVAL(c->out.hdr, SMB2_HDR_PID,         r->cancel.pending_id);
  58         SBVAL(c->out.hdr, SMB2_HDR_SEQNUM,      c->seqnum);
  59         if (r->session) {
  60                 SBVAL(c->out.hdr, SMB2_HDR_UID, r->session->uid);
  61         }
  62
  63         SSVAL(c->out.body, 0x02, 0);
  64
  65         old_timeout = c->transport->options.timeout;
  66         c->transport->options.timeout = 0;
  67         smb2_transport_send(c);
  68         c->transport->options.timeout = old_timeout;
  69
  70         if (c->state == SMB2_REQUEST_ERROR) {
  71                 status = c->status;
  72         } else {
  73                 status = NT_STATUS_OK;
  74         }
  75
  76         talloc_free(c);
  77         return status;
  78 }