source4/libcli/smb2/write.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    SMB2 client write call
   5
   6    Copyright (C) Andrew Tridgell 2005
   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 write request
  28 */
  29 struct smb2_request *smb2_write_send(struct smb2_tree *tree, struct smb2_write *io)
  30 {
  31         NTSTATUS status;
  32         struct smb2_request *req;
  33
  34         req = smb2_request_init_tree(tree, SMB2_OP_WRITE, 0x30, true, io->in.data.length);
  35         if (req == NULL) return NULL;
  36
  37         status = smb2_push_o16s32_blob(&req->out, 0x02, io->in.data);
  38         if (!NT_STATUS_IS_OK(status)) {
  39                 talloc_free(req);
  40                 return NULL;
  41         }
  42
  43         SBVAL(req->out.body, 0x08, io->in.offset);
  44         smb2_push_handle(req->out.body+0x10, &io->in.file.handle);
  45
  46         SBVAL(req->out.body, 0x20, io->in.unknown1);
  47         SBVAL(req->out.body, 0x28, io->in.unknown2);
  48
  49         smb2_transport_send(req);
  50
  51         return req;
  52 }
  53
  54
  55 /*
  56   recv a write reply
  57 */
  58 NTSTATUS smb2_write_recv(struct smb2_request *req, struct smb2_write *io)
  59 {
  60         if (!smb2_request_receive(req) ||
  61             smb2_request_is_error(req)) {
  62                 return smb2_request_destroy(req);
  63         }
  64
  65         SMB2_CHECK_PACKET_RECV(req, 0x10, true);
  66
  67         io->out._pad     = SVAL(req->in.body, 0x02);
  68         io->out.nwritten = IVAL(req->in.body, 0x04);
  69         io->out.unknown1 = BVAL(req->in.body, 0x08);
  70
  71         return smb2_request_destroy(req);
  72 }
  73
  74 /*
  75   sync write request
  76 */
  77 NTSTATUS smb2_write(struct smb2_tree *tree, struct smb2_write *io)
  78 {
  79         struct smb2_request *req = smb2_write_send(tree, io);
  80         return smb2_write_recv(req, io);
  81 }