/* 

   Unix SMB/CIFS implementation.

   SMB2 client lock handling

   Copyright (C) Stefan Metzmacher 2006

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/

#include "includes.h"

#include "libcli/smb2/smb2.h"

#include "libcli/smb2/smb2_calls.h"

/*

  send a lock request

*/

struct smb2_request *smb2_lock_send(struct smb2_tree *tree, struct smb2_lock *io)

{

  struct smb2_request *req;

  int i;

  req = smb2_request_init_tree(tree, SMB2_OP_LOCK, 

             24 + io->in.lock_count*24, false, 0);

  if (req == NULL) return NULL;

  /* this is quite bizarre - the spec says we must lie about the length! */

  SSVAL(req->out.body, 0, 0x30);

  SSVAL(req->out.body, 0x02, io->in.lock_count);

  SIVAL(req->out.body, 0x04, io->in.lock_sequence);

  smb2_push_handle(req->out.body+0x08, &io->in.file.handle);

  for (i=0;i<io->in.lock_count;i++) {

    SBVAL(req->out.body, 0x18 + i*24, io->in.locks[i].offset);

    SBVAL(req->out.body, 0x20 + i*24, io->in.locks[i].length);

    SIVAL(req->out.body, 0x28 + i*24, io->in.locks[i].flags);

    SIVAL(req->out.body, 0x2C + i*24, io->in.locks[i].reserved);

  }

  smb2_transport_send(req);

  return req;

}

/*

  recv a lock reply

*/

NTSTATUS smb2_lock_recv(struct smb2_request *req, struct smb2_lock *io)

{

  if (!smb2_request_receive(req) || 

      smb2_request_is_error(req)) {

    return smb2_request_destroy(req);

  }

  SMB2_CHECK_PACKET_RECV(req, 0x04, false);

  io->out.reserved = SVAL(req->in.body, 0x02);

  return smb2_request_destroy(req);

}

/*

  sync lock request

*/

NTSTATUS smb2_lock(struct smb2_tree *tree, struct smb2_lock *io)

{

  struct smb2_request *req = smb2_lock_send(tree, io);

  return smb2_lock_recv(req, io);

}