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s3: Fix an uninitialized variable reference
[Samba/gbeck.git] / source3 / libsmb / clilist.c
bloba84a64794b05e0cb51baaec1ac679974e5c44c01
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->inbuf,
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->inbuf,
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->inbuf, 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->inbuf,
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 uint32 resume_key = 0;
248 TALLOC_CTX *frame = talloc_stackframe();
249 DATA_BLOB last_name_raw = data_blob(NULL, 0);
250
251 /* NT uses 260, OS/2 uses 2. Both accept 1. */
252 info_level = (cli->capabilities&CAP_NT_SMBS)?260:1;
253
254 mask = SMB_STRDUP(Mask);
255 if (!mask) {
256 TALLOC_FREE(frame);
257 return -1;
258 }
259
260 while (ff_eos == 0) {
261 size_t nlen = 2*(strlen(mask)+1);
262
263 loop_count++;
264 if (loop_count > 200) {
265 DEBUG(0,("Error: Looping in FIND_NEXT??\n"));
266 break;
267 }
268
269 param = SMB_MALLOC_ARRAY(char, 12+nlen+last_name_raw.length+2);
270 if (!param) {
271 break;
272 }
273
274 if (First) {
275 setup = TRANSACT2_FINDFIRST;
276 SSVAL(param,0,attribute); /* attribute */
277 SSVAL(param,2,max_matches); /* max count */
278 SSVAL(param,4,(FLAG_TRANS2_FIND_REQUIRE_RESUME|FLAG_TRANS2_FIND_CLOSE_IF_END)); /* resume required + close on end */
279 SSVAL(param,6,info_level);
280 SIVAL(param,8,0);
281 p = param+12;
282 p += clistr_push(cli, param+12, mask,
283 nlen, STR_TERMINATE);
284 } else {
285 setup = TRANSACT2_FINDNEXT;
286 SSVAL(param,0,ff_dir_handle);
287 SSVAL(param,2,max_matches); /* max count */
288 SSVAL(param,4,info_level);
289 /* For W2K servers serving out FAT filesystems we *must* set the
290 resume key. If it's not FAT then it's returned as zero. */
291 SIVAL(param,6,resume_key); /* ff_resume_key */
292 /* NB. *DON'T* use continue here. If you do it seems that W2K and bretheren
293 can miss filenames. Use last filename continue instead. JRA */
294 SSVAL(param,10,(FLAG_TRANS2_FIND_REQUIRE_RESUME|FLAG_TRANS2_FIND_CLOSE_IF_END)); /* resume required + close on end */
295 p = param+12;
296 if (last_name_raw.length) {
297 memcpy(p, last_name_raw.data, last_name_raw.length);
298 p += last_name_raw.length;
299 } else {
300 p += clistr_push(cli, param+12, mask,
301 nlen, STR_TERMINATE);
302 }
303 }
304
305 param_len = PTR_DIFF(p, param);
306
307 if (!cli_send_trans(cli, SMBtrans2,
308 NULL, /* Name */
309 -1, 0, /* fid, flags */
310 &setup, 1, 0, /* setup, length, max */
311 param, param_len, 10, /* param, length, max */
312 NULL, 0,
313 #if 0
314 /* w2k value. */
315 MIN(16384,cli->max_xmit) /* data, length, max. */
316 #else
317 cli->max_xmit /* data, length, max. */
318 #endif
319 )) {
320 SAFE_FREE(param);
321 TALLOC_FREE(frame);
322 break;
323 }
324
325 SAFE_FREE(param);
326
327 if (!cli_receive_trans(cli, SMBtrans2,
328 &rparam, &param_len,
329 &rdata, &data_len) &&
330 cli_is_dos_error(cli)) {
331 /* We need to work around a Win95 bug - sometimes
332 it gives ERRSRV/ERRerror temprarily */
333 uint8 eclass;
334 uint32 ecode;
335
336 SAFE_FREE(rdata);
337 SAFE_FREE(rparam);
338
339 cli_dos_error(cli, &eclass, &ecode);
340
341 /*
342 * OS/2 might return "no more files",
343 * which just tells us, that searchcount is zero
344 * in this search.
345 * Guenter Kukkukk <linux@kukkukk.com>
346 */
347
348 if (eclass == ERRDOS && ecode == ERRnofiles) {
349 ff_searchcount = 0;
350 cli_reset_error(cli);
351 break;
352 }
353
354 if (eclass != ERRSRV || ecode != ERRerror)
355 break;
356 smb_msleep(100);
357 continue;
358 }
359
360 if (cli_is_error(cli) || !rdata || !rparam) {
361 SAFE_FREE(rdata);
362 SAFE_FREE(rparam);
363 break;
364 }
365
366 if (total_received == -1)
367 total_received = 0;
368
369 /* parse out some important return info */
370 p = rparam;
371 if (First) {
372 ff_dir_handle = SVAL(p,0);
373 ff_searchcount = SVAL(p,2);
374 ff_eos = SVAL(p,4);
375 } else {
376 ff_searchcount = SVAL(p,0);
377 ff_eos = SVAL(p,2);
378 }
379
380 if (ff_searchcount == 0) {
381 SAFE_FREE(rdata);
382 SAFE_FREE(rparam);
383 break;
384 }
385
386 /* point to the data bytes */
387 p = rdata;
388 rdata_end = rdata + data_len;
389
390 /* we might need the lastname for continuations */
391 for (p2=p,i=0;i<ff_searchcount && p2 < rdata_end;i++) {
392 if ((info_level == 260) && (i == ff_searchcount-1)) {
393 /* Last entry - fixup the last offset length. */
394 SIVAL(p2,0,PTR_DIFF((rdata + data_len),p2));
395 }
396 p2 += interpret_long_filename(frame,
397 cli,
398 info_level,
399 p2,
400 rdata_end,
401 &finfo,
402 &resume_key,
403 &last_name_raw);
404
405 if (!finfo.name) {
406 DEBUG(0,("cli_list_new: Error: unable to parse name from info level %d\n",
407 info_level));
408 ff_eos = 1;
409 break;
410 }
411 if (!First && *mask && strcsequal(finfo.name, mask)) {
412 DEBUG(0,("Error: Looping in FIND_NEXT as name %s has already been seen?\n",
413 finfo.name));
414 ff_eos = 1;
415 break;
416 }
417 }
418
419 SAFE_FREE(mask);
420 if (ff_searchcount > 0 && ff_eos == 0 && finfo.name) {
421 mask = SMB_STRDUP(finfo.name);
422 } else {
423 mask = SMB_STRDUP("");
424 }
425 if (!mask) {
426 SAFE_FREE(rdata);
427 SAFE_FREE(rparam);
428 break;
429 }
430
431 /* grab the data for later use */
432 /* and add them to the dirlist pool */
433 dirlist = (char *)SMB_REALLOC(dirlist,dirlist_len + data_len);
434
435 if (!dirlist) {
436 DEBUG(0,("cli_list_new: Failed to expand dirlist\n"));
437 SAFE_FREE(rdata);
438 SAFE_FREE(rparam);
439 break;
440 }
441
442 memcpy(dirlist+dirlist_len,p,data_len);
443 dirlist_len += data_len;
444
445 total_received += ff_searchcount;
446
447 SAFE_FREE(rdata);
448 SAFE_FREE(rparam);
449
450 DEBUG(3,("received %d entries (eos=%d)\n",
451 ff_searchcount,ff_eos));
452
453 if (ff_searchcount > 0)
454 loop_count = 0;
455
456 First = False;
457 }
458
459 /* see if the server disconnected or the connection otherwise failed */
460 if (cli_is_error(cli)) {
461 total_received = -1;
462 } else {
463 /* no connection problem. let user function add each entry */
464 rdata_end = dirlist + dirlist_len;
465 for (p=dirlist,i=0;i<total_received;i++) {
466 p += interpret_long_filename(frame,
467 cli,
468 info_level,
469 p,
470 rdata_end,
471 &finfo,
472 NULL,
473 NULL);
474 if (!finfo.name) {
475 DEBUG(0,("cli_list_new: unable to parse name from info level %d\n",
476 info_level));
477 break;
478 }
479 fn(cli->dfs_mountpoint, &finfo, Mask, state);
480 }
481 }
482
483 /* free up the dirlist buffer and last name raw blob */
484 SAFE_FREE(dirlist);
485 data_blob_free(&last_name_raw);
486 SAFE_FREE(mask);
487 TALLOC_FREE(frame);
488 return(total_received);
489 }
490
491 /****************************************************************************
492 Interpret a short filename structure.
493 The length of the structure is returned.
494 ****************************************************************************/
495
496 static bool interpret_short_filename(TALLOC_CTX *ctx,
497 struct cli_state *cli,
498 char *p,
499 file_info *finfo)
500 {
501 size_t ret;
502 ZERO_STRUCTP(finfo);
503
504 finfo->cli = cli;
505 finfo->mode = CVAL(p,21);
506
507 /* this date is converted to GMT by make_unix_date */
508 finfo->ctime_ts.tv_sec = cli_make_unix_date(cli, p+22);
509 finfo->ctime_ts.tv_nsec = 0;
510 finfo->mtime_ts.tv_sec = finfo->atime_ts.tv_sec = finfo->ctime_ts.tv_sec;
511 finfo->mtime_ts.tv_nsec = finfo->atime_ts.tv_nsec = 0;
512 finfo->size = IVAL(p,26);
513 ret = clistr_pull_talloc(ctx,
514 cli->inbuf,
515 &finfo->name,
516 p+30,
517 12,
518 STR_ASCII);
519 if (ret == (size_t)-1) {
520 return false;
521 }
522
523 if (finfo->name) {
524 strlcpy(finfo->short_name,
525 finfo->name,
526 sizeof(finfo->short_name));
527 }
528 return true;
529 return(DIR_STRUCT_SIZE);
530 }
531
532 /****************************************************************************
533 Do a directory listing, calling fn on each file found.
534 this uses the old SMBsearch interface. It is needed for testing Samba,
535 but should otherwise not be used.
536 ****************************************************************************/
537
538 int cli_list_old(struct cli_state *cli,const char *Mask,uint16 attribute,
539 void (*fn)(const char *, file_info *, const char *, void *), void *state)
540 {
541 char *p;
542 int received = 0;
543 bool first = True;
544 char status[21];
545 int num_asked = (cli->max_xmit - 100)/DIR_STRUCT_SIZE;
546 int num_received = 0;
547 int i;
548 char *dirlist = NULL;
549 char *mask = NULL;
550 TALLOC_CTX *frame = NULL;
551
552 ZERO_ARRAY(status);
553
554 mask = SMB_STRDUP(Mask);
555 if (!mask) {
556 return -1;
557 }
558
559 while (1) {
560 memset(cli->outbuf,'\0',smb_size);
561 memset(cli->inbuf,'\0',smb_size);
562
563 cli_set_message(cli->outbuf,2,0,True);
564
565 SCVAL(cli->outbuf,smb_com,SMBsearch);
566
567 SSVAL(cli->outbuf,smb_tid,cli->cnum);
568 cli_setup_packet(cli);
569
570 SSVAL(cli->outbuf,smb_vwv0,num_asked);
571 SSVAL(cli->outbuf,smb_vwv1,attribute);
572
573 p = smb_buf(cli->outbuf);
574 *p++ = 4;
575
576 p += clistr_push(cli, p, first?mask:"",
577 cli->bufsize - PTR_DIFF(p,cli->outbuf),
578 STR_TERMINATE);
579 *p++ = 5;
580 if (first) {
581 SSVAL(p,0,0);
582 p += 2;
583 } else {
584 SSVAL(p,0,21);
585 p += 2;
586 memcpy(p,status,21);
587 p += 21;
588 }
589
590 cli_setup_bcc(cli, p);
591 cli_send_smb(cli);
592 if (!cli_receive_smb(cli)) break;
593
594 received = SVAL(cli->inbuf,smb_vwv0);
595 if (received <= 0) break;
596
597 /* Ensure we received enough data. */
598 if ((cli->inbuf+4+smb_len(cli->inbuf) - (smb_buf(cli->inbuf)+3)) <
599 received*DIR_STRUCT_SIZE) {
600 break;
601 }
602
603 first = False;
604
605 dirlist = (char *)SMB_REALLOC(
606 dirlist,(num_received + received)*DIR_STRUCT_SIZE);
607 if (!dirlist) {
608 DEBUG(0,("cli_list_old: failed to expand dirlist"));
609 SAFE_FREE(mask);
610 return 0;
611 }
612
613 p = smb_buf(cli->inbuf) + 3;
614
615 memcpy(dirlist+num_received*DIR_STRUCT_SIZE,
616 p,received*DIR_STRUCT_SIZE);
617
618 memcpy(status,p + ((received-1)*DIR_STRUCT_SIZE),21);
619
620 num_received += received;
621
622 if (cli_is_error(cli)) break;
623 }
624
625 if (!first) {
626 memset(cli->outbuf,'\0',smb_size);
627 memset(cli->inbuf,'\0',smb_size);
628
629 cli_set_message(cli->outbuf,2,0,True);
630 SCVAL(cli->outbuf,smb_com,SMBfclose);
631 SSVAL(cli->outbuf,smb_tid,cli->cnum);
632 cli_setup_packet(cli);
633
634 SSVAL(cli->outbuf, smb_vwv0, 0); /* find count? */
635 SSVAL(cli->outbuf, smb_vwv1, attribute);
636
637 p = smb_buf(cli->outbuf);
638 *p++ = 4;
639 fstrcpy(p, "");
640 p += strlen(p) + 1;
641 *p++ = 5;
642 SSVAL(p, 0, 21);
643 p += 2;
644 memcpy(p,status,21);
645 p += 21;
646
647 cli_setup_bcc(cli, p);
648 cli_send_smb(cli);
649 if (!cli_receive_smb(cli)) {
650 DEBUG(0,("Error closing search: %s\n",cli_errstr(cli)));
651 }
652 }
653
654 frame = talloc_stackframe();
655 for (p=dirlist,i=0;i<num_received;i++) {
656 file_info finfo;
657 if (!interpret_short_filename(frame, cli, p, &finfo)) {
658 break;
659 }
660 p += DIR_STRUCT_SIZE;
661 fn("\\", &finfo, Mask, state);
662 }
663 TALLOC_FREE(frame);
664
665 SAFE_FREE(mask);
666 SAFE_FREE(dirlist);
667 return(num_received);
668 }
669
670 /****************************************************************************
671 Do a directory listing, calling fn on each file found.
672 This auto-switches between old and new style.
673 ****************************************************************************/
674
675 int cli_list(struct cli_state *cli,const char *Mask,uint16 attribute,
676 void (*fn)(const char *, file_info *, const char *, void *), void *state)
677 {
678 if (cli->protocol <= PROTOCOL_LANMAN1)
679 return cli_list_old(cli, Mask, attribute, fn, state);
680 return cli_list_new(cli, Mask, attribute, fn, state);
681 }
WIP