source4/libcli/smb2/lock.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    SMB2 client lock handling
   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/smb2/smb2.h"
  24 #include "libcli/smb2/smb2_calls.h"
  25
  26 /*
  27   send a lock request
  28 */
  29 struct smb2_request *smb2_lock_send(struct smb2_tree *tree, struct smb2_lock *io)
  30 {
  31         struct smb2_request *req;
  32         int i;
  33
  34         req = smb2_request_init_tree(tree, SMB2_OP_LOCK,
  35                                      24 + io->in.lock_count*24, false, 0);
  36         if (req == NULL) return NULL;
  37
  38         /* this is quite bizarre - the spec says we must lie about the length! */
  39         SSVAL(req->out.body, 0, 0x30);
  40
  41         SSVAL(req->out.body, 0x02, io->in.lock_count);
  42         SIVAL(req->out.body, 0x04, io->in.lock_sequence);
  43         smb2_push_handle(req->out.body+0x08, &io->in.file.handle);
  44
  45         for (i=0;i<io->in.lock_count;i++) {
  46                 SBVAL(req->out.body, 0x18 + i*24, io->in.locks[i].offset);
  47                 SBVAL(req->out.body, 0x20 + i*24, io->in.locks[i].length);
  48                 SIVAL(req->out.body, 0x28 + i*24, io->in.locks[i].flags);
  49                 SIVAL(req->out.body, 0x2C + i*24, io->in.locks[i].reserved);
  50         }
  51
  52         smb2_transport_send(req);
  53
  54         return req;
  55 }
  56
  57
  58 /*
  59   recv a lock reply
  60 */
  61 NTSTATUS smb2_lock_recv(struct smb2_request *req, struct smb2_lock *io)
  62 {
  63         if (!smb2_request_receive(req) ||
  64             smb2_request_is_error(req)) {
  65                 return smb2_request_destroy(req);
  66         }
  67
  68         SMB2_CHECK_PACKET_RECV(req, 0x04, false);
  69
  70         io->out.reserved = SVAL(req->in.body, 0x02);
  71
  72         return smb2_request_destroy(req);
  73 }
  74
  75 /*
  76   sync lock request
  77 */
  78 NTSTATUS smb2_lock(struct smb2_tree *tree, struct smb2_lock *io)
  79 {
  80         struct smb2_request *req = smb2_lock_send(tree, io);
  81         return smb2_lock_recv(req, io);
  82 }