source: vendor/current/source3/smbd/smb2_ioctl.c

Last change on this file was 988, checked in by Silvan Scherrer, 9 years ago

Samba Server: update vendor to version 4.4.3
File size: 13.4 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Core SMB2 server
4
5 Copyright (C) Stefan Metzmacher 2009
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19*/
20
21#include "includes.h"
22#include "smbd/smbd.h"
23#include "smbd/globals.h"
24#include "../libcli/smb/smb_common.h"
25#include "../lib/util/tevent_ntstatus.h"
26#include "include/ntioctl.h"
27#include "smb2_ioctl_private.h"
28#include "librpc/gen_ndr/ioctl.h"
29
30static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
31 struct tevent_context *ev,
32 struct smbd_smb2_request *smb2req,
33 struct files_struct *in_fsp,
34 uint32_t in_ctl_code,
35 DATA_BLOB in_input,
36 uint32_t in_max_output,
37 uint32_t in_flags);
38static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
39 TALLOC_CTX *mem_ctx,
40 DATA_BLOB *out_output,
41 bool *disconnect);
42
43static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq);
44NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req)
45{
46 NTSTATUS status;
47 const uint8_t *inbody;
48 uint32_t min_buffer_offset;
49 uint32_t max_buffer_offset;
50 uint32_t min_output_offset;
51 uint32_t allowed_length_in;
52 uint32_t allowed_length_out;
53 uint32_t in_ctl_code;
54 uint64_t in_file_id_persistent;
55 uint64_t in_file_id_volatile;
56 struct files_struct *in_fsp = NULL;
57 uint32_t in_input_offset;
58 uint32_t in_input_length;
59 DATA_BLOB in_input_buffer = data_blob_null;
60 uint32_t in_max_input_length;
61 uint32_t in_output_offset;
62 uint32_t in_output_length;
63 DATA_BLOB in_output_buffer = data_blob_null;
64 uint32_t in_max_output_length;
65 uint32_t in_flags;
66 uint32_t data_length_in;
67 uint32_t data_length_out;
68 uint32_t data_length_tmp;
69 uint32_t data_length_max;
70 struct tevent_req *subreq;
71
72 status = smbd_smb2_request_verify_sizes(req, 0x39);
73 if (!NT_STATUS_IS_OK(status)) {
74 return smbd_smb2_request_error(req, status);
75 }
76 inbody = SMBD_SMB2_IN_BODY_PTR(req);
77
78 in_ctl_code = IVAL(inbody, 0x04);
79 in_file_id_persistent = BVAL(inbody, 0x08);
80 in_file_id_volatile = BVAL(inbody, 0x10);
81 in_input_offset = IVAL(inbody, 0x18);
82 in_input_length = IVAL(inbody, 0x1C);
83 in_max_input_length = IVAL(inbody, 0x20);
84 in_output_offset = IVAL(inbody, 0x24);
85 in_output_length = IVAL(inbody, 0x28);
86 in_max_output_length = IVAL(inbody, 0x2C);
87 in_flags = IVAL(inbody, 0x30);
88
89 min_buffer_offset = SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req);
90 max_buffer_offset = min_buffer_offset + SMBD_SMB2_IN_DYN_LEN(req);
91 min_output_offset = min_buffer_offset;
92
93 /*
94 * InputOffset (4 bytes): The offset, in bytes, from the beginning of
95 * the SMB2 header to the input data buffer. If no input data is
96 * required for the FSCTL/IOCTL command being issued, the client SHOULD
97 * set this value to 0.<49>
98 * <49> If no input data is required for the FSCTL/IOCTL command being
99 * issued, Windows-based clients set this field to any value.
100 */
101 allowed_length_in = 0;
102 if ((in_input_offset > 0) && (in_input_length > 0)) {
103 uint32_t tmp_ofs;
104
105 if (in_input_offset < min_buffer_offset) {
106 return smbd_smb2_request_error(req,
107 NT_STATUS_INVALID_PARAMETER);
108 }
109 if (in_input_offset > max_buffer_offset) {
110 return smbd_smb2_request_error(req,
111 NT_STATUS_INVALID_PARAMETER);
112 }
113 allowed_length_in = max_buffer_offset - in_input_offset;
114
115 tmp_ofs = in_input_offset - min_buffer_offset;
116 in_input_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
117 in_input_buffer.data += tmp_ofs;
118 in_input_buffer.length = in_input_length;
119 min_output_offset += tmp_ofs;
120 min_output_offset += in_input_length;
121 }
122
123 if (in_input_length > allowed_length_in) {
124 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
125 }
126
127 allowed_length_out = 0;
128 if (in_output_offset > 0) {
129 if (in_output_offset < min_buffer_offset) {
130 return smbd_smb2_request_error(req,
131 NT_STATUS_INVALID_PARAMETER);
132 }
133 if (in_output_offset > max_buffer_offset) {
134 return smbd_smb2_request_error(req,
135 NT_STATUS_INVALID_PARAMETER);
136 }
137 allowed_length_out = max_buffer_offset - in_output_offset;
138 }
139
140 if (in_output_length > allowed_length_out) {
141 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
142 }
143
144 if (in_output_length > 0) {
145 uint32_t tmp_ofs;
146
147 if (in_output_offset < min_output_offset) {
148 return smbd_smb2_request_error(req,
149 NT_STATUS_INVALID_PARAMETER);
150 }
151
152 tmp_ofs = in_output_offset - min_buffer_offset;
153 in_output_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
154 in_output_buffer.data += tmp_ofs;
155 in_output_buffer.length = in_output_length;
156 }
157
158 /*
159 * verify the credits and avoid overflows
160 * in_input_buffer.length and in_output_buffer.length
161 * are already verified.
162 */
163 data_length_in = in_input_buffer.length + in_output_buffer.length;
164
165 data_length_out = in_max_input_length;
166 data_length_tmp = UINT32_MAX - data_length_out;
167 if (data_length_tmp < in_max_output_length) {
168 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
169 }
170 data_length_out += in_max_output_length;
171
172 data_length_max = MAX(data_length_in, data_length_out);
173
174 status = smbd_smb2_request_verify_creditcharge(req, data_length_max);
175 if (!NT_STATUS_IS_OK(status)) {
176 return smbd_smb2_request_error(req, status);
177 }
178
179 /*
180 * If the Flags field of the request is not SMB2_0_IOCTL_IS_FSCTL the
181 * server MUST fail the request with STATUS_NOT_SUPPORTED.
182 */
183 if (in_flags != SMB2_IOCTL_FLAG_IS_FSCTL) {
184 return smbd_smb2_request_error(req, NT_STATUS_NOT_SUPPORTED);
185 }
186
187 switch (in_ctl_code) {
188 case FSCTL_DFS_GET_REFERRALS:
189 case FSCTL_DFS_GET_REFERRALS_EX:
190 case FSCTL_PIPE_WAIT:
191 case FSCTL_VALIDATE_NEGOTIATE_INFO_224:
192 case FSCTL_VALIDATE_NEGOTIATE_INFO:
193 case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
194 /*
195 * Some SMB2 specific CtlCodes like FSCTL_DFS_GET_REFERRALS or
196 * FSCTL_PIPE_WAIT does not take a file handle.
197 *
198 * If FileId in the SMB2 Header of the request is not
199 * 0xFFFFFFFFFFFFFFFF, then the server MUST fail the request
200 * with STATUS_INVALID_PARAMETER.
201 */
202 if (in_file_id_persistent != UINT64_MAX ||
203 in_file_id_volatile != UINT64_MAX) {
204 return smbd_smb2_request_error(req,
205 NT_STATUS_INVALID_PARAMETER);
206 }
207 break;
208 default:
209 in_fsp = file_fsp_smb2(req, in_file_id_persistent,
210 in_file_id_volatile);
211 if (in_fsp == NULL) {
212 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
213 }
214 break;
215 }
216
217 subreq = smbd_smb2_ioctl_send(req, req->sconn->ev_ctx,
218 req, in_fsp,
219 in_ctl_code,
220 in_input_buffer,
221 in_max_output_length,
222 in_flags);
223 if (subreq == NULL) {
224 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
225 }
226 tevent_req_set_callback(subreq, smbd_smb2_request_ioctl_done, req);
227
228 return smbd_smb2_request_pending_queue(req, subreq, 1000);
229}
230
231/*
232 * 3.3.4.4 Sending an Error Response
233 * An error code other than one of the following indicates a failure:
234 */
235static bool smbd_smb2_ioctl_is_failure(uint32_t ctl_code, NTSTATUS status,
236 size_t data_size)
237{
238 if (NT_STATUS_IS_OK(status)) {
239 return false;
240 }
241
242 /*
243 * STATUS_BUFFER_OVERFLOW in a FSCTL_PIPE_TRANSCEIVE, FSCTL_PIPE_PEEK or
244 * FSCTL_DFS_GET_REFERRALS Response specified in section 2.2.32.<153>
245 */
246 if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)
247 && ((ctl_code == FSCTL_PIPE_TRANSCEIVE)
248 || (ctl_code == FSCTL_PIPE_PEEK)
249 || (ctl_code == FSCTL_DFS_GET_REFERRALS))) {
250 return false;
251 }
252
253 /*
254 * Any status other than STATUS_SUCCESS in a FSCTL_SRV_COPYCHUNK or
255 * FSCTL_SRV_COPYCHUNK_WRITE Response, when returning an
256 * SRV_COPYCHUNK_RESPONSE as described in section 2.2.32.1.
257 */
258 if (((ctl_code == FSCTL_SRV_COPYCHUNK)
259 || (ctl_code == FSCTL_SRV_COPYCHUNK_WRITE))
260 && (data_size == sizeof(struct srv_copychunk_rsp))) {
261 return false;
262 }
263
264 return true;
265}
266
267static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq)
268{
269 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
270 struct smbd_smb2_request);
271 const uint8_t *inbody;
272 DATA_BLOB outbody;
273 DATA_BLOB outdyn;
274 uint32_t in_ctl_code;
275 uint64_t in_file_id_persistent;
276 uint64_t in_file_id_volatile;
277 uint32_t out_input_offset;
278 uint32_t out_output_offset;
279 DATA_BLOB out_output_buffer = data_blob_null;
280 NTSTATUS status;
281 NTSTATUS error; /* transport error */
282 bool disconnect = false;
283
284 status = smbd_smb2_ioctl_recv(subreq, req,
285 &out_output_buffer,
286 &disconnect);
287
288 DEBUG(10,("smbd_smb2_request_ioctl_done: smbd_smb2_ioctl_recv returned "
289 "%u status %s\n",
290 (unsigned int)out_output_buffer.length,
291 nt_errstr(status) ));
292
293 TALLOC_FREE(subreq);
294 if (disconnect) {
295 error = status;
296 smbd_server_connection_terminate(req->xconn,
297 nt_errstr(error));
298 return;
299 }
300
301 inbody = SMBD_SMB2_IN_BODY_PTR(req);
302
303 in_ctl_code = IVAL(inbody, 0x04);
304 in_file_id_persistent = BVAL(inbody, 0x08);
305 in_file_id_volatile = BVAL(inbody, 0x10);
306
307 if (smbd_smb2_ioctl_is_failure(in_ctl_code, status,
308 out_output_buffer.length)) {
309 error = smbd_smb2_request_error(req, status);
310 if (!NT_STATUS_IS_OK(error)) {
311 smbd_server_connection_terminate(req->xconn,
312 nt_errstr(error));
313 return;
314 }
315 return;
316 }
317
318 out_input_offset = SMB2_HDR_BODY + 0x30;
319 out_output_offset = SMB2_HDR_BODY + 0x30;
320
321 outbody = smbd_smb2_generate_outbody(req, 0x30);
322 if (outbody.data == NULL) {
323 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
324 if (!NT_STATUS_IS_OK(error)) {
325 smbd_server_connection_terminate(req->xconn,
326 nt_errstr(error));
327 return;
328 }
329 return;
330 }
331
332 SSVAL(outbody.data, 0x00, 0x30 + 1); /* struct size */
333 SSVAL(outbody.data, 0x02, 0); /* reserved */
334 SIVAL(outbody.data, 0x04,
335 in_ctl_code); /* ctl code */
336 SBVAL(outbody.data, 0x08,
337 in_file_id_persistent); /* file id (persistent) */
338 SBVAL(outbody.data, 0x10,
339 in_file_id_volatile); /* file id (volatile) */
340 SIVAL(outbody.data, 0x18,
341 out_input_offset); /* input offset */
342 SIVAL(outbody.data, 0x1C, 0); /* input count */
343 SIVAL(outbody.data, 0x20,
344 out_output_offset); /* output offset */
345 SIVAL(outbody.data, 0x24,
346 out_output_buffer.length); /* output count */
347 SIVAL(outbody.data, 0x28, 0); /* flags */
348 SIVAL(outbody.data, 0x2C, 0); /* reserved */
349
350 /*
351 * Note: Windows Vista and 2008 send back also the
352 * input from the request. But it was fixed in
353 * Windows 7.
354 */
355 outdyn = out_output_buffer;
356
357 error = smbd_smb2_request_done_ex(req, status, outbody, &outdyn,
358 __location__);
359 if (!NT_STATUS_IS_OK(error)) {
360 smbd_server_connection_terminate(req->xconn,
361 nt_errstr(error));
362 return;
363 }
364}
365
366static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
367 struct tevent_context *ev,
368 struct smbd_smb2_request *smb2req,
369 struct files_struct *fsp,
370 uint32_t in_ctl_code,
371 DATA_BLOB in_input,
372 uint32_t in_max_output,
373 uint32_t in_flags)
374{
375 struct tevent_req *req;
376 struct smbd_smb2_ioctl_state *state;
377 struct smb_request *smbreq;
378
379 req = tevent_req_create(mem_ctx, &state,
380 struct smbd_smb2_ioctl_state);
381 if (req == NULL) {
382 return NULL;
383 }
384 state->smb2req = smb2req;
385 state->smbreq = NULL;
386 state->fsp = fsp;
387 state->in_input = in_input;
388 state->in_max_output = in_max_output;
389 state->out_output = data_blob_null;
390
391 DEBUG(10, ("smbd_smb2_ioctl: ctl_code[0x%08x] %s, %s\n",
392 (unsigned)in_ctl_code,
393 fsp ? fsp_str_dbg(fsp) : "<no handle>",
394 fsp_fnum_dbg(fsp)));
395
396 smbreq = smbd_smb2_fake_smb_request(smb2req);
397 if (tevent_req_nomem(smbreq, req)) {
398 return tevent_req_post(req, ev);
399 }
400 state->smbreq = smbreq;
401
402 switch (in_ctl_code & IOCTL_DEV_TYPE_MASK) {
403 case FSCTL_DFS:
404 return smb2_ioctl_dfs(in_ctl_code, ev, req, state);
405 break;
406 case FSCTL_FILESYSTEM:
407 return smb2_ioctl_filesys(in_ctl_code, ev, req, state);
408 break;
409 case FSCTL_NAMED_PIPE:
410 return smb2_ioctl_named_pipe(in_ctl_code, ev, req, state);
411 break;
412 case FSCTL_NETWORK_FILESYSTEM:
413 return smb2_ioctl_network_fs(in_ctl_code, ev, req, state);
414 break;
415 default:
416 if (IS_IPC(smbreq->conn)) {
417 tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
418 } else {
419 tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
420 }
421
422 return tevent_req_post(req, ev);
423 break;
424 }
425
426 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
427 return tevent_req_post(req, ev);
428}
429
430static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
431 TALLOC_CTX *mem_ctx,
432 DATA_BLOB *out_output,
433 bool *disconnect)
434{
435 NTSTATUS status = NT_STATUS_OK;
436 struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
437 struct smbd_smb2_ioctl_state);
438 enum tevent_req_state req_state;
439 uint64_t err;
440
441 *disconnect = state->disconnect;
442
443 if ((tevent_req_is_error(req, &req_state, &err) == false)
444 || (req_state == TEVENT_REQ_USER_ERROR)) {
445 /*
446 * Return output buffer to caller if the ioctl was successfully
447 * processed, even if a user error occurred. Some ioctls return
448 * data on failure.
449 */
450 *out_output = state->out_output;
451 talloc_steal(mem_ctx, out_output->data);
452 }
453
454 tevent_req_is_nterror(req, &status);
455 tevent_req_received(req);
456 return status;
457}
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