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 3 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, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "libcli/raw/libcliraw.h"
  24 #include "libcli/smb2/smb2.h"
  25 #include "libcli/smb2/smb2_calls.h"
  26
  27 /*
  28   send a cancel request
  29 */
  30 NTSTATUS smb2_cancel(struct smb2_request *r)
  31 {
  32         NTSTATUS status;
  33         struct smb2_request *c;
  34         uint32_t old_timeout;
  35         uint64_t old_seqnum;
  36
  37         /*
  38          * if we don't get a pending id yet, we just
  39          * mark the request for pending, so that we directly
  40          * send the cancel after getting the pending id
  41          */
  42         if (!r->cancel.can_cancel) {
  43                 r->cancel.do_cancel++;
  44                 return NT_STATUS_OK;
  45         }
  46
  47         /* we don't want a seqmun for a SMB2 Cancel */
  48         old_seqnum = r->transport->seqnum;
  49         c = smb2_request_init(r->transport, SMB2_OP_CANCEL, 0x04, false, 0);
  50         r->transport->seqnum = old_seqnum;
  51         NT_STATUS_HAVE_NO_MEMORY(c);
  52         c->seqnum = 0;
  53
  54         SIVAL(c->out.hdr, SMB2_HDR_FLAGS,       0x00000002);
  55         SSVAL(c->out.hdr, SMB2_HDR_CREDIT,      0x0030);
  56         SIVAL(c->out.hdr, SMB2_HDR_PID,         r->cancel.pending_id);
  57         SBVAL(c->out.hdr, SMB2_HDR_MESSAGE_ID,  c->seqnum);
  58         if (r->session) {
  59                 SBVAL(c->out.hdr, SMB2_HDR_SESSION_ID,  r->session->uid);
  60         }
  61
  62         SSVAL(c->out.body, 0x02, 0);
  63
  64         old_timeout = c->transport->options.request_timeout;
  65         c->transport->options.request_timeout = 0;
  66         smb2_transport_send(c);
  67         c->transport->options.request_timeout = old_timeout;
  68
  69         if (c->state == SMB2_REQUEST_ERROR) {
  70                 status = c->status;
  71         } else {
  72                 status = NT_STATUS_OK;
  73         }
  74
  75         talloc_free(c);
  76         return status;
  77 }