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s3: Fix an uninitialized variable reference
[Samba.git] / source / libsmb / clilist.c
blob1431b804b040e0258670f79e24a171b3635bbb08
1 /*
2 Unix SMB/CIFS implementation.
3 client directory list routines
4 Copyright (C) Andrew Tridgell 1994-1998
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "includes.h"
21
22 /****************************************************************************
23 Calculate a safe next_entry_offset.
24 ****************************************************************************/
25
26 static size_t calc_next_entry_offset(const char *base, const char *pdata_end)
27 {
28 size_t next_entry_offset = (size_t)IVAL(base,0);
29
30 if (next_entry_offset == 0 ||
31 base + next_entry_offset < base ||
32 base + next_entry_offset > pdata_end) {
33 next_entry_offset = pdata_end - base;
34 }
35 return next_entry_offset;
36 }
37
38 /****************************************************************************
39 Interpret a long filename structure - this is mostly guesses at the moment.
40 The length of the structure is returned
41 The structure of a long filename depends on the info level. 260 is used
42 by NT and 2 is used by OS/2
43 ****************************************************************************/
44
45 static size_t interpret_long_filename(TALLOC_CTX *ctx,
46 struct cli_state *cli,
47 int level,
48 const char *p,
49 const char *pdata_end,
50 file_info *finfo,
51 uint32 *p_resume_key,
52 DATA_BLOB *p_last_name_raw)
53 {
54 int len;
55 size_t ret;
56 const char *base = p;
57
58 data_blob_free(p_last_name_raw);
59
60 if (p_resume_key) {
61 *p_resume_key = 0;
62 }
63 ZERO_STRUCTP(finfo);
64 finfo->cli = cli;
65
66 switch (level) {
67 case 1: /* OS/2 understands this */
68 /* these dates are converted to GMT by
69 make_unix_date */
70 if (pdata_end - base < 27) {
71 return pdata_end - base;
72 }
73 finfo->ctime_ts = convert_time_t_to_timespec(cli_make_unix_date2(cli, p+4));
74 finfo->atime_ts = convert_time_t_to_timespec(cli_make_unix_date2(cli, p+8));
75 finfo->mtime_ts = convert_time_t_to_timespec(cli_make_unix_date2(cli, p+12));
76 finfo->size = IVAL(p,16);
77 finfo->mode = CVAL(p,24);
78 len = CVAL(p, 26);
79 p += 27;
80 p += clistr_align_in(cli, p, 0);
81
82 /* We can safely use len here (which is required by OS/2)
83 * and the NAS-BASIC server instead of +2 or +1 as the
84 * STR_TERMINATE flag below is
85 * actually used as the length calculation.
86 * The len is merely an upper bound.
87 * Due to the explicit 2 byte null termination
88 * in cli_receive_trans/cli_receive_nt_trans
89 * we know this is safe. JRA + kukks
90 */
91
92 if (p + len > pdata_end) {
93 return pdata_end - base;
94 }
95
96 /* the len+2 below looks strange but it is
97 important to cope with the differences
98 between win2000 and win9x for this call
99 (tridge) */
100 ret = clistr_pull_talloc(ctx,
101 cli,
102 &finfo->name,
103 p,
104 len+2,
105 STR_TERMINATE);
106 if (ret == (size_t)-1) {
107 return pdata_end - base;
108 }
109 p += ret;
110 return PTR_DIFF(p, base);
111
112 case 2: /* this is what OS/2 uses mostly */
113 /* these dates are converted to GMT by
114 make_unix_date */
115 if (pdata_end - base < 31) {
116 return pdata_end - base;
117 }
118 finfo->ctime_ts = convert_time_t_to_timespec(cli_make_unix_date2(cli, p+4));
119 finfo->atime_ts = convert_time_t_to_timespec(cli_make_unix_date2(cli, p+8));
120 finfo->mtime_ts = convert_time_t_to_timespec(cli_make_unix_date2(cli, p+12));
121 finfo->size = IVAL(p,16);
122 finfo->mode = CVAL(p,24);
123 len = CVAL(p, 30);
124 p += 31;
125 /* check for unisys! */
126 if (p + len + 1 > pdata_end) {
127 return pdata_end - base;
128 }
129 ret = clistr_pull_talloc(ctx,
130 cli,
131 &finfo->name,
132 p,
133 len,
134 STR_NOALIGN);
135 if (ret == (size_t)-1) {
136 return pdata_end - base;
137 }
138 p += ret;
139 return PTR_DIFF(p, base) + 1;
140
141 case 260: /* NT uses this, but also accepts 2 */
142 {
143 size_t namelen, slen;
144
145 if (pdata_end - base < 94) {
146 return pdata_end - base;
147 }
148
149 p += 4; /* next entry offset */
150
151 if (p_resume_key) {
152 *p_resume_key = IVAL(p,0);
153 }
154 p += 4; /* fileindex */
155
156 /* Offset zero is "create time", not "change time". */
157 p += 8;
158 finfo->atime_ts = interpret_long_date(p);
159 p += 8;
160 finfo->mtime_ts = interpret_long_date(p);
161 p += 8;
162 finfo->ctime_ts = interpret_long_date(p);
163 p += 8;
164 finfo->size = IVAL2_TO_SMB_BIG_UINT(p,0);
165 p += 8;
166 p += 8; /* alloc size */
167 finfo->mode = CVAL(p,0);
168 p += 4;
169 namelen = IVAL(p,0);
170 p += 4;
171 p += 4; /* EA size */
172 slen = SVAL(p, 0);
173 if (slen > 24) {
174 /* Bad short name length. */
175 return pdata_end - base;
176 }
177 p += 2;
178 {
179 /* stupid NT bugs. grr */
180 int flags = 0;
181 if (p[1] == 0 && namelen > 1) flags |= STR_UNICODE;
182 clistr_pull(cli, finfo->short_name, p,
183 sizeof(finfo->short_name),
184 slen, flags);
185 }
186 p += 24; /* short name? */
187 if (p + namelen < p || p + namelen > pdata_end) {
188 return pdata_end - base;
189 }
190 ret = clistr_pull_talloc(ctx,
191 cli,
192 &finfo->name,
193 p,
194 namelen,
195 0);
196 if (ret == (size_t)-1) {
197 return pdata_end - base;
198 }
199
200 /* To be robust in the face of unicode conversion failures
201 we need to copy the raw bytes of the last name seen here.
202 Namelen doesn't include the terminating unicode null, so
203 copy it here. */
204
205 if (p_last_name_raw) {
206 *p_last_name_raw = data_blob(NULL, namelen+2);
207 memcpy(p_last_name_raw->data, p, namelen);
208 SSVAL(p_last_name_raw->data, namelen, 0);
209 }
210 return calc_next_entry_offset(base, pdata_end);
211 }
212 }
213
214 DEBUG(1,("Unknown long filename format %d\n",level));
215 return calc_next_entry_offset(base, pdata_end);
216 }
217
218 /****************************************************************************
219 Do a directory listing, calling fn on each file found.
220 ****************************************************************************/
221
222 int cli_list_new(struct cli_state *cli,const char *Mask,uint16 attribute,
223 void (*fn)(const char *, file_info *, const char *, void *), void *state)
224 {
225 #if 1
226 int max_matches = 1366; /* Match W2k - was 512. */
227 #else
228 int max_matches = 512;
229 #endif
230 int info_level;
231 char *p, *p2, *rdata_end;
232 char *mask = NULL;
233 file_info finfo;
234 int i;
235 char *dirlist = NULL;
236 int dirlist_len = 0;
237 int total_received = -1;
238 bool First = True;
239 int ff_searchcount=0;
240 int ff_eos=0;
241 int ff_dir_handle=0;
242 int loop_count = 0;
243 char *rparam=NULL, *rdata=NULL;
244 unsigned int param_len, data_len;
245 uint16 setup;
246 char *param;
247 const char *mnt;
248 uint32 resume_key = 0;
249 TALLOC_CTX *frame = talloc_stackframe();
250 DATA_BLOB last_name_raw = data_blob(NULL, 0);
251
252 /* NT uses 260, OS/2 uses 2. Both accept 1. */
253 info_level = (cli->capabilities&CAP_NT_SMBS)?260:1;
254
255 mask = SMB_STRDUP(Mask);
256 if (!mask) {
257 TALLOC_FREE(frame);
258 return -1;
259 }
260
261 while (ff_eos == 0) {
262 size_t nlen = 2*(strlen(mask)+1);
263
264 loop_count++;
265 if (loop_count > 200) {
266 DEBUG(0,("Error: Looping in FIND_NEXT??\n"));
267 break;
268 }
269
270 param = SMB_MALLOC_ARRAY(char, 12+nlen+last_name_raw.length+2);
271 if (!param) {
272 break;
273 }
274
275 if (First) {
276 setup = TRANSACT2_FINDFIRST;
277 SSVAL(param,0,attribute); /* attribute */
278 SSVAL(param,2,max_matches); /* max count */
279 SSVAL(param,4,(FLAG_TRANS2_FIND_REQUIRE_RESUME|FLAG_TRANS2_FIND_CLOSE_IF_END)); /* resume required + close on end */
280 SSVAL(param,6,info_level);
281 SIVAL(param,8,0);
282 p = param+12;
283 p += clistr_push(cli, param+12, mask,
284 nlen, STR_TERMINATE);
285 } else {
286 setup = TRANSACT2_FINDNEXT;
287 SSVAL(param,0,ff_dir_handle);
288 SSVAL(param,2,max_matches); /* max count */
289 SSVAL(param,4,info_level);
290 /* For W2K servers serving out FAT filesystems we *must* set the
291 resume key. If it's not FAT then it's returned as zero. */
292 SIVAL(param,6,resume_key); /* ff_resume_key */
293 /* NB. *DON'T* use continue here. If you do it seems that W2K and bretheren
294 can miss filenames. Use last filename continue instead. JRA */
295 SSVAL(param,10,(FLAG_TRANS2_FIND_REQUIRE_RESUME|FLAG_TRANS2_FIND_CLOSE_IF_END)); /* resume required + close on end */
296 p = param+12;
297 if (last_name_raw.length) {
298 memcpy(p, last_name_raw.data, last_name_raw.length);
299 p += last_name_raw.length;
300 } else {
301 p += clistr_push(cli, param+12, mask,
302 nlen, STR_TERMINATE);
303 }
304 }
305
306 param_len = PTR_DIFF(p, param);
307
308 if (!cli_send_trans(cli, SMBtrans2,
309 NULL, /* Name */
310 -1, 0, /* fid, flags */
311 &setup, 1, 0, /* setup, length, max */
312 param, param_len, 10, /* param, length, max */
313 NULL, 0,
314 #if 0
315 /* w2k value. */
316 MIN(16384,cli->max_xmit) /* data, length, max. */
317 #else
318 cli->max_xmit /* data, length, max. */
319 #endif
320 )) {
321 SAFE_FREE(param);
322 TALLOC_FREE(frame);
323 break;
324 }
325
326 SAFE_FREE(param);
327
328 if (!cli_receive_trans(cli, SMBtrans2,
329 &rparam, &param_len,
330 &rdata, &data_len) &&
331 cli_is_dos_error(cli)) {
332 /* We need to work around a Win95 bug - sometimes
333 it gives ERRSRV/ERRerror temprarily */
334 uint8 eclass;
335 uint32 ecode;
336
337 SAFE_FREE(rdata);
338 SAFE_FREE(rparam);
339
340 cli_dos_error(cli, &eclass, &ecode);
341
342 /*
343 * OS/2 might return "no more files",
344 * which just tells us, that searchcount is zero
345 * in this search.
346 * Guenter Kukkukk <linux@kukkukk.com>
347 */
348
349 if (eclass == ERRDOS && ecode == ERRnofiles) {
350 ff_searchcount = 0;
351 cli_reset_error(cli);
352 break;
353 }
354
355 if (eclass != ERRSRV || ecode != ERRerror)
356 break;
357 smb_msleep(100);
358 continue;
359 }
360
361 if (cli_is_error(cli) || !rdata || !rparam) {
362 SAFE_FREE(rdata);
363 SAFE_FREE(rparam);
364 break;
365 }
366
367 if (total_received == -1)
368 total_received = 0;
369
370 /* parse out some important return info */
371 p = rparam;
372 if (First) {
373 ff_dir_handle = SVAL(p,0);
374 ff_searchcount = SVAL(p,2);
375 ff_eos = SVAL(p,4);
376 } else {
377 ff_searchcount = SVAL(p,0);
378 ff_eos = SVAL(p,2);
379 }
380
381 if (ff_searchcount == 0) {
382 SAFE_FREE(rdata);
383 SAFE_FREE(rparam);
384 break;
385 }
386
387 /* point to the data bytes */
388 p = rdata;
389 rdata_end = rdata + data_len;
390
391 /* we might need the lastname for continuations */
392 for (p2=p,i=0;i<ff_searchcount && p2 < rdata_end;i++) {
393 if ((info_level == 260) && (i == ff_searchcount-1)) {
394 /* Last entry - fixup the last offset length. */
395 SIVAL(p2,0,PTR_DIFF((rdata + data_len),p2));
396 }
397 p2 += interpret_long_filename(frame,
398 cli,
399 info_level,
400 p2,
401 rdata_end,
402 &finfo,
403 &resume_key,
404 &last_name_raw);
405
406 if (!finfo.name) {
407 DEBUG(0,("cli_list_new: Error: unable to parse name from info level %d\n",
408 info_level));
409 ff_eos = 1;
410 break;
411 }
412 if (!First && *mask && strcsequal(finfo.name, mask)) {
413 DEBUG(0,("Error: Looping in FIND_NEXT as name %s has already been seen?\n",
414 finfo.name));
415 ff_eos = 1;
416 break;
417 }
418 }
419
420 SAFE_FREE(mask);
421 if (ff_searchcount > 0 && ff_eos == 0 && finfo.name) {
422 mask = SMB_STRDUP(finfo.name);
423 } else {
424 mask = SMB_STRDUP("");
425 }
426 if (!mask) {
427 SAFE_FREE(rdata);
428 SAFE_FREE(rparam);
429 break;
430 }
431
432 /* grab the data for later use */
433 /* and add them to the dirlist pool */
434 dirlist = (char *)SMB_REALLOC(dirlist,dirlist_len + data_len);
435
436 if (!dirlist) {
437 DEBUG(0,("cli_list_new: Failed to expand dirlist\n"));
438 SAFE_FREE(rdata);
439 SAFE_FREE(rparam);
440 break;
441 }
442
443 memcpy(dirlist+dirlist_len,p,data_len);
444 dirlist_len += data_len;
445
446 total_received += ff_searchcount;
447
448 SAFE_FREE(rdata);
449 SAFE_FREE(rparam);
450
451 DEBUG(3,("received %d entries (eos=%d)\n",
452 ff_searchcount,ff_eos));
453
454 if (ff_searchcount > 0)
455 loop_count = 0;
456
457 First = False;
458 }
459
460 mnt = cli_cm_get_mntpoint( cli );
461
462 /* see if the server disconnected or the connection otherwise failed */
463 if (cli_is_error(cli)) {
464 total_received = -1;
465 } else {
466 /* no connection problem. let user function add each entry */
467 rdata_end = dirlist + dirlist_len;
468 for (p=dirlist,i=0;i<total_received;i++) {
469 p += interpret_long_filename(frame,
470 cli,
471 info_level,
472 p,
473 rdata_end,
474 &finfo,
475 NULL,
476 NULL);
477 if (!finfo.name) {
478 DEBUG(0,("cli_list_new: unable to parse name from info level %d\n",
479 info_level));
480 break;
481 }
482 fn(mnt,&finfo, Mask, state);
483 }
484 }
485
486 /* free up the dirlist buffer and last name raw blob */
487 SAFE_FREE(dirlist);
488 data_blob_free(&last_name_raw);
489 SAFE_FREE(mask);
490 TALLOC_FREE(frame);
491 return(total_received);
492 }
493
494 /****************************************************************************
495 Interpret a short filename structure.
496 The length of the structure is returned.
497 ****************************************************************************/
498
499 static bool interpret_short_filename(TALLOC_CTX *ctx,
500 struct cli_state *cli,
501 char *p,
502 file_info *finfo)
503 {
504 size_t ret;
505 ZERO_STRUCTP(finfo);
506
507 finfo->cli = cli;
508 finfo->mode = CVAL(p,21);
509
510 /* this date is converted to GMT by make_unix_date */
511 finfo->ctime_ts.tv_sec = cli_make_unix_date(cli, p+22);
512 finfo->ctime_ts.tv_nsec = 0;
513 finfo->mtime_ts.tv_sec = finfo->atime_ts.tv_sec = finfo->ctime_ts.tv_sec;
514 finfo->mtime_ts.tv_nsec = finfo->atime_ts.tv_nsec = 0;
515 finfo->size = IVAL(p,26);
516 ret = clistr_pull_talloc(ctx,
517 cli,
518 &finfo->name,
519 p+30,
520 12,
521 STR_ASCII);
522 if (ret == (size_t)-1) {
523 return false;
524 }
525
526 if (finfo->name) {
527 strlcpy(finfo->short_name,
528 finfo->name,
529 sizeof(finfo->short_name));
530 }
531 return true;
532 return(DIR_STRUCT_SIZE);
533 }
534
535 /****************************************************************************
536 Do a directory listing, calling fn on each file found.
537 this uses the old SMBsearch interface. It is needed for testing Samba,
538 but should otherwise not be used.
539 ****************************************************************************/
540
541 int cli_list_old(struct cli_state *cli,const char *Mask,uint16 attribute,
542 void (*fn)(const char *, file_info *, const char *, void *), void *state)
543 {
544 char *p;
545 int received = 0;
546 bool first = True;
547 char status[21];
548 int num_asked = (cli->max_xmit - 100)/DIR_STRUCT_SIZE;
549 int num_received = 0;
550 int i;
551 char *dirlist = NULL;
552 char *mask = NULL;
553 TALLOC_CTX *frame = NULL;
554
555 ZERO_ARRAY(status);
556
557 mask = SMB_STRDUP(Mask);
558 if (!mask) {
559 return -1;
560 }
561
562 while (1) {
563 memset(cli->outbuf,'\0',smb_size);
564 memset(cli->inbuf,'\0',smb_size);
565
566 cli_set_message(cli->outbuf,2,0,True);
567
568 SCVAL(cli->outbuf,smb_com,SMBsearch);
569
570 SSVAL(cli->outbuf,smb_tid,cli->cnum);
571 cli_setup_packet(cli);
572
573 SSVAL(cli->outbuf,smb_vwv0,num_asked);
574 SSVAL(cli->outbuf,smb_vwv1,attribute);
575
576 p = smb_buf(cli->outbuf);
577 *p++ = 4;
578
579 p += clistr_push(cli, p, first?mask:"",
580 cli->bufsize - PTR_DIFF(p,cli->outbuf),
581 STR_TERMINATE);
582 *p++ = 5;
583 if (first) {
584 SSVAL(p,0,0);
585 p += 2;
586 } else {
587 SSVAL(p,0,21);
588 p += 2;
589 memcpy(p,status,21);
590 p += 21;
591 }
592
593 cli_setup_bcc(cli, p);
594 cli_send_smb(cli);
595 if (!cli_receive_smb(cli)) break;
596
597 received = SVAL(cli->inbuf,smb_vwv0);
598 if (received <= 0) break;
599
600 /* Ensure we received enough data. */
601 if ((cli->inbuf+4+smb_len(cli->inbuf) - (smb_buf(cli->inbuf)+3)) <
602 received*DIR_STRUCT_SIZE) {
603 break;
604 }
605
606 first = False;
607
608 dirlist = (char *)SMB_REALLOC(
609 dirlist,(num_received + received)*DIR_STRUCT_SIZE);
610 if (!dirlist) {
611 DEBUG(0,("cli_list_old: failed to expand dirlist"));
612 SAFE_FREE(mask);
613 return 0;
614 }
615
616 p = smb_buf(cli->inbuf) + 3;
617
618 memcpy(dirlist+num_received*DIR_STRUCT_SIZE,
619 p,received*DIR_STRUCT_SIZE);
620
621 memcpy(status,p + ((received-1)*DIR_STRUCT_SIZE),21);
622
623 num_received += received;
624
625 if (cli_is_error(cli)) break;
626 }
627
628 if (!first) {
629 memset(cli->outbuf,'\0',smb_size);
630 memset(cli->inbuf,'\0',smb_size);
631
632 cli_set_message(cli->outbuf,2,0,True);
633 SCVAL(cli->outbuf,smb_com,SMBfclose);
634 SSVAL(cli->outbuf,smb_tid,cli->cnum);
635 cli_setup_packet(cli);
636
637 SSVAL(cli->outbuf, smb_vwv0, 0); /* find count? */
638 SSVAL(cli->outbuf, smb_vwv1, attribute);
639
640 p = smb_buf(cli->outbuf);
641 *p++ = 4;
642 fstrcpy(p, "");
643 p += strlen(p) + 1;
644 *p++ = 5;
645 SSVAL(p, 0, 21);
646 p += 2;
647 memcpy(p,status,21);
648 p += 21;
649
650 cli_setup_bcc(cli, p);
651 cli_send_smb(cli);
652 if (!cli_receive_smb(cli)) {
653 DEBUG(0,("Error closing search: %s\n",cli_errstr(cli)));
654 }
655 }
656
657 frame = talloc_stackframe();
658 for (p=dirlist,i=0;i<num_received;i++) {
659 file_info finfo;
660 if (!interpret_short_filename(frame, cli, p, &finfo)) {
661 break;
662 }
663 p += DIR_STRUCT_SIZE;
664 fn("\\", &finfo, Mask, state);
665 }
666 TALLOC_FREE(frame);
667
668 SAFE_FREE(mask);
669 SAFE_FREE(dirlist);
670 return(num_received);
671 }
672
673 /****************************************************************************
674 Do a directory listing, calling fn on each file found.
675 This auto-switches between old and new style.
676 ****************************************************************************/
677
678 int cli_list(struct cli_state *cli,const char *Mask,uint16 attribute,
679 void (*fn)(const char *, file_info *, const char *, void *), void *state)
680 {
681 if (cli->protocol <= PROTOCOL_LANMAN1)
682 return cli_list_old(cli, Mask, attribute, fn, state);
683 return cli_list_new(cli, Mask, attribute, fn, state);
684 }
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