source4/libcli/smb2/ioctl.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    SMB2 client ioctl 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 #include "librpc/gen_ndr/ioctl.h"
  26
  27 /*
  28   send a ioctl request
  29 */
  30 struct smb2_request *smb2_ioctl_send(struct smb2_tree *tree, struct smb2_ioctl *io)
  31 {
  32         NTSTATUS status;
  33         struct smb2_request *req;
  34
  35         req = smb2_request_init_tree(tree, SMB2_OP_IOCTL, 0x38, true,
  36                                      io->in.in.length+io->in.out.length);
  37         if (req == NULL) return NULL;
  38
  39         SSVAL(req->out.body, 0x02, 0); /* pad */
  40         SIVAL(req->out.body, 0x04, io->in.function);
  41         smb2_push_handle(req->out.body+0x08, &io->in.file.handle);
  42
  43         status = smb2_push_o32s32_blob(&req->out, 0x18, io->in.out);
  44         if (!NT_STATUS_IS_OK(status)) {
  45                 talloc_free(req);
  46                 return NULL;
  47         }
  48
  49         SIVAL(req->out.body, 0x20, io->in.unknown2);
  50
  51         status = smb2_push_o32s32_blob(&req->out, 0x24, io->in.in);
  52         if (!NT_STATUS_IS_OK(status)) {
  53                 talloc_free(req);
  54                 return NULL;
  55         }
  56
  57         SIVAL(req->out.body, 0x2C, io->in.max_response_size);
  58         SBVAL(req->out.body, 0x30, io->in.flags);
  59
  60         smb2_transport_send(req);
  61
  62         return req;
  63 }
  64
  65 /*
  66  * 3.3.4.4 Sending an Error Response
  67  */
  68 static bool smb2_ioctl_is_failure(uint32_t ctl_code, NTSTATUS status,
  69                                   size_t data_size)
  70 {
  71         if (NT_STATUS_IS_OK(status)) {
  72                 return false;
  73         }
  74
  75         if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)
  76          && ((ctl_code == FSCTL_PIPE_TRANSCEIVE)
  77           || (ctl_code == FSCTL_PIPE_PEEK)
  78           || (ctl_code == FSCTL_DFS_GET_REFERRALS))) {
  79                 return false;
  80         }
  81
  82         if (((ctl_code == FSCTL_SRV_COPYCHUNK)
  83                                 || (ctl_code == FSCTL_SRV_COPYCHUNK_WRITE))
  84          && (data_size == sizeof(struct srv_copychunk_rsp))) {
  85                 /*
  86                  * copychunk responses may come with copychunk data or error
  87                  * response data, independent of status.
  88                  */
  89                 return false;
  90         }
  91
  92         return true;
  93 }
  94
  95 /*
  96   recv a ioctl reply
  97 */
  98 NTSTATUS smb2_ioctl_recv(struct smb2_request *req,
  99                          TALLOC_CTX *mem_ctx, struct smb2_ioctl *io)
 100 {
 101         NTSTATUS status;
 102
 103         if (!smb2_request_receive(req) ||
 104             smb2_ioctl_is_failure(io->in.function, req->status,
 105                                   req->in.bufinfo.data_size)) {
 106                 return smb2_request_destroy(req);
 107         }
 108
 109         SMB2_CHECK_PACKET_RECV(req, 0x30, true);
 110
 111         io->out._pad       = SVAL(req->in.body, 0x02);
 112         io->out.function   = IVAL(req->in.body, 0x04);
 113         smb2_pull_handle(req->in.body+0x08, &io->out.file.handle);
 114
 115         status = smb2_pull_o32s32_blob(&req->in, mem_ctx, req->in.body+0x18, &io->out.in);
 116         if (!NT_STATUS_IS_OK(status)) {
 117                 smb2_request_destroy(req);
 118                 return status;
 119         }
 120
 121         status = smb2_pull_o32s32_blob(&req->in, mem_ctx, req->in.body+0x20, &io->out.out);
 122         if (!NT_STATUS_IS_OK(status)) {
 123                 smb2_request_destroy(req);
 124                 return status;
 125         }
 126
 127         io->out.unknown2 = IVAL(req->in.body, 0x28);
 128         io->out.unknown3 = IVAL(req->in.body, 0x2C);
 129
 130         return smb2_request_destroy(req);
 131 }
 132
 133 /*
 134   sync ioctl request
 135 */
 136 NTSTATUS smb2_ioctl(struct smb2_tree *tree, TALLOC_CTX *mem_ctx, struct smb2_ioctl *io)
 137 {
 138         struct smb2_request *req = smb2_ioctl_send(tree, io);
 139         return smb2_ioctl_recv(req, mem_ctx, io);
 140 }