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smbd: Add missing {}
[Samba.git] / source3 / smbd / smb2_find.c
blob6bc44a51450bd5e65ae35b90992873c4f5b71612
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 "trans2.h"
26 #include "../lib/util/tevent_ntstatus.h"
27
28 static struct tevent_req *smbd_smb2_find_send(TALLOC_CTX *mem_ctx,
29 struct tevent_context *ev,
30 struct smbd_smb2_request *smb2req,
31 struct files_struct *in_fsp,
32 uint8_t in_file_info_class,
33 uint8_t in_flags,
34 uint32_t in_file_index,
35 uint32_t in_output_buffer_length,
36 const char *in_file_name);
37 static NTSTATUS smbd_smb2_find_recv(struct tevent_req *req,
38 TALLOC_CTX *mem_ctx,
39 DATA_BLOB *out_output_buffer);
40
41 static void smbd_smb2_request_find_done(struct tevent_req *subreq);
42 NTSTATUS smbd_smb2_request_process_find(struct smbd_smb2_request *req)
43 {
44 NTSTATUS status;
45 const uint8_t *inbody;
46 uint8_t in_file_info_class;
47 uint8_t in_flags;
48 uint32_t in_file_index;
49 uint64_t in_file_id_persistent;
50 uint64_t in_file_id_volatile;
51 struct files_struct *in_fsp;
52 uint16_t in_file_name_offset;
53 uint16_t in_file_name_length;
54 DATA_BLOB in_file_name_buffer;
55 char *in_file_name_string;
56 size_t in_file_name_string_size;
57 uint32_t in_output_buffer_length;
58 struct tevent_req *subreq;
59 bool ok;
60
61 status = smbd_smb2_request_verify_sizes(req, 0x21);
62 if (!NT_STATUS_IS_OK(status)) {
63 return smbd_smb2_request_error(req, status);
64 }
65 inbody = SMBD_SMB2_IN_BODY_PTR(req);
66
67 in_file_info_class = CVAL(inbody, 0x02);
68 in_flags = CVAL(inbody, 0x03);
69 in_file_index = IVAL(inbody, 0x04);
70 in_file_id_persistent = BVAL(inbody, 0x08);
71 in_file_id_volatile = BVAL(inbody, 0x10);
72 in_file_name_offset = SVAL(inbody, 0x18);
73 in_file_name_length = SVAL(inbody, 0x1A);
74 in_output_buffer_length = IVAL(inbody, 0x1C);
75
76 if (in_file_name_offset == 0 && in_file_name_length == 0) {
77 /* This is ok */
78 } else if (in_file_name_offset !=
79 (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req))) {
80 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
81 }
82
83 if (in_file_name_length > SMBD_SMB2_IN_DYN_LEN(req)) {
84 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
85 }
86
87 /* The output header is 8 bytes. */
88 if (in_output_buffer_length <= 8) {
89 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
90 }
91
92 DEBUG(10,("smbd_smb2_request_find_done: in_output_buffer_length = %u\n",
93 (unsigned int)in_output_buffer_length ));
94
95 /* Take into account the output header. */
96 in_output_buffer_length -= 8;
97
98 in_file_name_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
99 in_file_name_buffer.length = in_file_name_length;
100
101 ok = convert_string_talloc(req, CH_UTF16, CH_UNIX,
102 in_file_name_buffer.data,
103 in_file_name_buffer.length,
104 &in_file_name_string,
105 &in_file_name_string_size);
106 if (!ok) {
107 return smbd_smb2_request_error(req, NT_STATUS_ILLEGAL_CHARACTER);
108 }
109
110 if (in_file_name_buffer.length == 0) {
111 in_file_name_string_size = 0;
112 }
113
114 if (strlen(in_file_name_string) != in_file_name_string_size) {
115 return smbd_smb2_request_error(req, NT_STATUS_OBJECT_NAME_INVALID);
116 }
117
118 in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
119 if (in_fsp == NULL) {
120 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
121 }
122
123 subreq = smbd_smb2_find_send(req, req->sconn->ev_ctx,
124 req, in_fsp,
125 in_file_info_class,
126 in_flags,
127 in_file_index,
128 in_output_buffer_length,
129 in_file_name_string);
130 if (subreq == NULL) {
131 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
132 }
133 tevent_req_set_callback(subreq, smbd_smb2_request_find_done, req);
134
135 return smbd_smb2_request_pending_queue(req, subreq, 500);
136 }
137
138 static void smbd_smb2_request_find_done(struct tevent_req *subreq)
139 {
140 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
141 struct smbd_smb2_request);
142 DATA_BLOB outbody;
143 DATA_BLOB outdyn;
144 uint16_t out_output_buffer_offset;
145 DATA_BLOB out_output_buffer = data_blob_null;
146 NTSTATUS status;
147 NTSTATUS error; /* transport error */
148
149 status = smbd_smb2_find_recv(subreq,
150 req,
151 &out_output_buffer);
152 TALLOC_FREE(subreq);
153 if (!NT_STATUS_IS_OK(status)) {
154 error = smbd_smb2_request_error(req, status);
155 if (!NT_STATUS_IS_OK(error)) {
156 smbd_server_connection_terminate(req->sconn,
157 nt_errstr(error));
158 return;
159 }
160 return;
161 }
162
163 out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
164
165 outbody = smbd_smb2_generate_outbody(req, 0x08);
166 if (outbody.data == NULL) {
167 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
168 if (!NT_STATUS_IS_OK(error)) {
169 smbd_server_connection_terminate(req->sconn,
170 nt_errstr(error));
171 return;
172 }
173 return;
174 }
175
176 SSVAL(outbody.data, 0x00, 0x08 + 1); /* struct size */
177 SSVAL(outbody.data, 0x02,
178 out_output_buffer_offset); /* output buffer offset */
179 SIVAL(outbody.data, 0x04,
180 out_output_buffer.length); /* output buffer length */
181
182 DEBUG(10,("smbd_smb2_request_find_done: out_output_buffer.length = %u\n",
183 (unsigned int)out_output_buffer.length ));
184
185 outdyn = out_output_buffer;
186
187 error = smbd_smb2_request_done(req, outbody, &outdyn);
188 if (!NT_STATUS_IS_OK(error)) {
189 smbd_server_connection_terminate(req->sconn,
190 nt_errstr(error));
191 return;
192 }
193 }
194
195 struct smbd_smb2_find_state {
196 struct smbd_smb2_request *smb2req;
197 DATA_BLOB out_output_buffer;
198 };
199
200 static struct tevent_req *smbd_smb2_find_send(TALLOC_CTX *mem_ctx,
201 struct tevent_context *ev,
202 struct smbd_smb2_request *smb2req,
203 struct files_struct *fsp,
204 uint8_t in_file_info_class,
205 uint8_t in_flags,
206 uint32_t in_file_index,
207 uint32_t in_output_buffer_length,
208 const char *in_file_name)
209 {
210 struct tevent_req *req;
211 struct smbd_smb2_find_state *state;
212 struct smb_request *smbreq;
213 connection_struct *conn = smb2req->tcon->compat;
214 NTSTATUS status;
215 NTSTATUS empty_status;
216 uint32_t info_level;
217 uint32_t max_count;
218 char *pdata;
219 char *base_data;
220 char *end_data;
221 int last_entry_off = 0;
222 int off = 0;
223 uint32_t num = 0;
224 uint32_t dirtype = FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_DIRECTORY;
225 bool dont_descend = false;
226 bool ask_sharemode = true;
227 bool wcard_has_wild;
228 struct tm tm;
229 char *p;
230
231 req = tevent_req_create(mem_ctx, &state,
232 struct smbd_smb2_find_state);
233 if (req == NULL) {
234 return NULL;
235 }
236 state->smb2req = smb2req;
237 state->out_output_buffer = data_blob_null;
238
239 DEBUG(10,("smbd_smb2_find_send: %s - %s\n",
240 fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
241
242 smbreq = smbd_smb2_fake_smb_request(smb2req);
243 if (tevent_req_nomem(smbreq, req)) {
244 return tevent_req_post(req, ev);
245 }
246
247 if (!fsp->is_directory) {
248 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
249 return tevent_req_post(req, ev);
250 }
251
252 if (strcmp(in_file_name, "") == 0) {
253 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_INVALID);
254 return tevent_req_post(req, ev);
255 }
256 if (strchr_m(in_file_name, '\\') != NULL) {
257 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_INVALID);
258 return tevent_req_post(req, ev);
259 }
260 if (strchr_m(in_file_name, '/') != NULL) {
261 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_INVALID);
262 return tevent_req_post(req, ev);
263 }
264
265 p = strptime(in_file_name, GMT_FORMAT, &tm);
266 if ((p != NULL) && (*p =='\0')) {
267 /*
268 * Bogus find that asks for a shadow copy timestamp as a
269 * directory. The correct response is that it does not exist as
270 * a directory.
271 */
272 tevent_req_nterror(req, NT_STATUS_NO_SUCH_FILE);
273 return tevent_req_post(req, ev);
274 }
275
276 if (in_output_buffer_length > smb2req->sconn->smb2.max_trans) {
277 DEBUG(2,("smbd_smb2_find_send: "
278 "client ignored max trans:%s: 0x%08X: 0x%08X\n",
279 __location__, in_output_buffer_length,
280 smb2req->sconn->smb2.max_trans));
281 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
282 return tevent_req_post(req, ev);
283 }
284
285 status = smbd_smb2_request_verify_creditcharge(smb2req,
286 in_output_buffer_length);
287
288 if (!NT_STATUS_IS_OK(status)) {
289 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
290 return tevent_req_post(req, ev);
291 }
292
293 switch (in_file_info_class) {
294 case SMB2_FIND_DIRECTORY_INFO:
295 info_level = SMB_FIND_FILE_DIRECTORY_INFO;
296 break;
297
298 case SMB2_FIND_FULL_DIRECTORY_INFO:
299 info_level = SMB_FIND_FILE_FULL_DIRECTORY_INFO;
300 break;
301
302 case SMB2_FIND_BOTH_DIRECTORY_INFO:
303 info_level = SMB_FIND_FILE_BOTH_DIRECTORY_INFO;
304 break;
305
306 case SMB2_FIND_NAME_INFO:
307 info_level = SMB_FIND_FILE_NAMES_INFO;
308 break;
309
310 case SMB2_FIND_ID_BOTH_DIRECTORY_INFO:
311 info_level = SMB_FIND_ID_BOTH_DIRECTORY_INFO;
312 break;
313
314 case SMB2_FIND_ID_FULL_DIRECTORY_INFO:
315 info_level = SMB_FIND_ID_FULL_DIRECTORY_INFO;
316 break;
317
318 default:
319 tevent_req_nterror(req, NT_STATUS_INVALID_INFO_CLASS);
320 return tevent_req_post(req, ev);
321 }
322
323 if (in_flags & SMB2_CONTINUE_FLAG_REOPEN) {
324 dptr_CloseDir(fsp);
325 }
326
327 wcard_has_wild = ms_has_wild(in_file_name);
328
329 /* Ensure we've canonicalized any search path if not a wildcard. */
330 if (!wcard_has_wild) {
331 struct smb_filename *smb_fname = NULL;
332 const char *fullpath;
333 char tmpbuf[PATH_MAX];
334 char *to_free = NULL;
335
336 if (ISDOT(fsp->fsp_name->base_name)) {
337 fullpath = in_file_name;
338 } else {
339 size_t len;
340 char *tmp;
341
342 len = full_path_tos(
343 fsp->fsp_name->base_name, in_file_name,
344 tmpbuf, sizeof(tmpbuf), &tmp, &to_free);
345 if (len == -1) {
346 tevent_req_oom(req);
347 return tevent_req_post(req, ev);
348 }
349 fullpath = tmp;
350 }
351 status = filename_convert(state,
352 conn,
353 false, /* Not a DFS path. */
354 fullpath,
355 UCF_SAVE_LCOMP | UCF_ALWAYS_ALLOW_WCARD_LCOMP,
356 &wcard_has_wild,
357 &smb_fname);
358
359 TALLOC_FREE(to_free);
360
361 if (tevent_req_nterror(req, status)) {
362 return tevent_req_post(req, ev);
363 }
364
365 in_file_name = smb_fname->original_lcomp;
366 }
367
368 if (fsp->dptr == NULL) {
369 status = dptr_create(conn,
370 NULL, /* req */
371 fsp,
372 fsp->fsp_name->base_name,
373 false, /* old_handle */
374 false, /* expect_close */
375 0, /* spid */
376 in_file_name, /* wcard */
377 wcard_has_wild,
378 dirtype,
379 &fsp->dptr);
380 if (!NT_STATUS_IS_OK(status)) {
381 tevent_req_nterror(req, status);
382 return tevent_req_post(req, ev);
383 }
384
385 empty_status = NT_STATUS_NO_SUCH_FILE;
386 } else {
387 empty_status = STATUS_NO_MORE_FILES;
388 }
389
390 if (in_flags & SMB2_CONTINUE_FLAG_RESTART) {
391 dptr_SeekDir(fsp->dptr, 0);
392 }
393
394 if (in_flags & SMB2_CONTINUE_FLAG_SINGLE) {
395 max_count = 1;
396 } else {
397 max_count = UINT16_MAX;
398 }
399
400 #define DIR_ENTRY_SAFETY_MARGIN 4096
401
402 state->out_output_buffer = data_blob_talloc(state, NULL,
403 in_output_buffer_length + DIR_ENTRY_SAFETY_MARGIN);
404 if (tevent_req_nomem(state->out_output_buffer.data, req)) {
405 return tevent_req_post(req, ev);
406 }
407
408 state->out_output_buffer.length = 0;
409 pdata = (char *)state->out_output_buffer.data;
410 base_data = pdata;
411 /*
412 * end_data must include the safety margin as it's what is
413 * used to determine if pushed strings have been truncated.
414 */
415 end_data = pdata + in_output_buffer_length + DIR_ENTRY_SAFETY_MARGIN - 1;
416 last_entry_off = 0;
417 off = 0;
418 num = 0;
419
420 DEBUG(8,("smbd_smb2_find_send: dirpath=<%s> dontdescend=<%s>, "
421 "in_output_buffer_length = %u\n",
422 fsp->fsp_name->base_name, lp_dont_descend(talloc_tos(), SNUM(conn)),
423 (unsigned int)in_output_buffer_length ));
424 if (in_list(fsp->fsp_name->base_name,lp_dont_descend(talloc_tos(), SNUM(conn)),
425 conn->case_sensitive)) {
426 dont_descend = true;
427 }
428
429 ask_sharemode = lp_parm_bool(SNUM(conn),
430 "smbd", "search ask sharemode",
431 true);
432
433 while (true) {
434 bool ok;
435 bool got_exact_match = false;
436 bool out_of_space = false;
437 int space_remaining = in_output_buffer_length - off;
438
439 SMB_ASSERT(space_remaining >= 0);
440
441 ok = smbd_dirptr_lanman2_entry(state,
442 conn,
443 fsp->dptr,
444 smbreq->flags2,
445 in_file_name,
446 dirtype,
447 info_level,
448 false, /* requires_resume_key */
449 dont_descend,
450 ask_sharemode,
451 8, /* align to 8 bytes */
452 false, /* no padding */
453 &pdata,
454 base_data,
455 end_data,
456 space_remaining,
457 &out_of_space,
458 &got_exact_match,
459 &last_entry_off,
460 NULL);
461
462 off = (int)PTR_DIFF(pdata, base_data);
463
464 if (!ok) {
465 if (num > 0) {
466 SIVAL(state->out_output_buffer.data, last_entry_off, 0);
467 tevent_req_done(req);
468 return tevent_req_post(req, ev);
469 } else if (out_of_space) {
470 tevent_req_nterror(req, NT_STATUS_INFO_LENGTH_MISMATCH);
471 return tevent_req_post(req, ev);
472 } else {
473 tevent_req_nterror(req, empty_status);
474 return tevent_req_post(req, ev);
475 }
476 }
477
478 num++;
479 state->out_output_buffer.length = off;
480
481 if (num < max_count) {
482 continue;
483 }
484
485 SIVAL(state->out_output_buffer.data, last_entry_off, 0);
486 tevent_req_done(req);
487 return tevent_req_post(req, ev);
488 }
489
490 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
491 return tevent_req_post(req, ev);
492 }
493
494 static NTSTATUS smbd_smb2_find_recv(struct tevent_req *req,
495 TALLOC_CTX *mem_ctx,
496 DATA_BLOB *out_output_buffer)
497 {
498 NTSTATUS status;
499 struct smbd_smb2_find_state *state = tevent_req_data(req,
500 struct smbd_smb2_find_state);
501
502 if (tevent_req_is_nterror(req, &status)) {
503 tevent_req_received(req);
504 return status;
505 }
506
507 *out_output_buffer = state->out_output_buffer;
508 talloc_steal(mem_ctx, out_output_buffer->data);
509
510 tevent_req_received(req);
511 return NT_STATUS_OK;
512 }
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