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krb5-locator: fix dsgetdcname caller.
[Samba.git] / source / libsmb / clilist.c
blob50918458b081010b8211493e1fbf23fea9340fd3
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 +1 here (which is required by OS/2)
83 * instead of +2 as the STR_TERMINATE flag below is
84 * actually used as the length calculation.
85 * The len+2 is merely an upper bound.
86 * Due to the explicit 2 byte null termination
87 * in cli_receive_trans/cli_receive_nt_trans
88 * we know this is safe. JRA + kukks
89 */
90
91 if (p + len + 1 > pdata_end) {
92 return pdata_end - base;
93 }
94
95 /* the len+2 below looks strange but it is
96 important to cope with the differences
97 between win2000 and win9x for this call
98 (tridge) */
99 ret = clistr_pull_talloc(ctx,
100 cli,
101 &finfo->name,
102 p,
103 len+2,
104 STR_TERMINATE);
105 if (ret == (size_t)-1) {
106 return pdata_end - base;
107 }
108 p += ret;
109 return PTR_DIFF(p, base);
110
111 case 2: /* this is what OS/2 uses mostly */
112 /* these dates are converted to GMT by
113 make_unix_date */
114 if (pdata_end - base < 31) {
115 return pdata_end - base;
116 }
117 finfo->ctime_ts = convert_time_t_to_timespec(cli_make_unix_date2(cli, p+4));
118 finfo->atime_ts = convert_time_t_to_timespec(cli_make_unix_date2(cli, p+8));
119 finfo->mtime_ts = convert_time_t_to_timespec(cli_make_unix_date2(cli, p+12));
120 finfo->size = IVAL(p,16);
121 finfo->mode = CVAL(p,24);
122 len = CVAL(p, 30);
123 p += 31;
124 /* check for unisys! */
125 if (p + len + 1 > pdata_end) {
126 return pdata_end - base;
127 }
128 ret = clistr_pull_talloc(ctx,
129 cli,
130 &finfo->name,
131 p,
132 len,
133 STR_NOALIGN);
134 if (ret == (size_t)-1) {
135 return pdata_end - base;
136 }
137 p += ret;
138 return PTR_DIFF(p, base) + 1;
139
140 case 260: /* NT uses this, but also accepts 2 */
141 {
142 size_t namelen, slen;
143
144 if (pdata_end - base < 94) {
145 return pdata_end - base;
146 }
147
148 p += 4; /* next entry offset */
149
150 if (p_resume_key) {
151 *p_resume_key = IVAL(p,0);
152 }
153 p += 4; /* fileindex */
154
155 /* Offset zero is "create time", not "change time". */
156 p += 8;
157 finfo->atime_ts = interpret_long_date(p);
158 p += 8;
159 finfo->mtime_ts = interpret_long_date(p);
160 p += 8;
161 finfo->ctime_ts = interpret_long_date(p);
162 p += 8;
163 finfo->size = IVAL2_TO_SMB_BIG_UINT(p,0);
164 p += 8;
165 p += 8; /* alloc size */
166 finfo->mode = CVAL(p,0);
167 p += 4;
168 namelen = IVAL(p,0);
169 p += 4;
170 p += 4; /* EA size */
171 slen = SVAL(p, 0);
172 if (slen > 24) {
173 /* Bad short name length. */
174 return pdata_end - base;
175 }
176 p += 2;
177 {
178 /* stupid NT bugs. grr */
179 int flags = 0;
180 if (p[1] == 0 && namelen > 1) flags |= STR_UNICODE;
181 clistr_pull(cli, finfo->short_name, p,
182 sizeof(finfo->short_name),
183 slen, flags);
184 }
185 p += 24; /* short name? */
186 if (p + namelen < p || p + namelen > pdata_end) {
187 return pdata_end - base;
188 }
189 ret = clistr_pull_talloc(ctx,
190 cli,
191 &finfo->name,
192 p,
193 namelen,
194 0);
195 if (ret == (size_t)-1) {
196 return pdata_end - base;
197 }
198
199 /* To be robust in the face of unicode conversion failures
200 we need to copy the raw bytes of the last name seen here.
201 Namelen doesn't include the terminating unicode null, so
202 copy it here. */
203
204 if (p_last_name_raw) {
205 *p_last_name_raw = data_blob(NULL, namelen+2);
206 memcpy(p_last_name_raw->data, p, namelen);
207 SSVAL(p_last_name_raw->data, namelen, 0);
208 }
209 return calc_next_entry_offset(base, pdata_end);
210 }
211 }
212
213 DEBUG(1,("Unknown long filename format %d\n",level));
214 return calc_next_entry_offset(base, pdata_end);
215 }
216
217 /****************************************************************************
218 Do a directory listing, calling fn on each file found.
219 ****************************************************************************/
220
221 int cli_list_new(struct cli_state *cli,const char *Mask,uint16 attribute,
222 void (*fn)(const char *, file_info *, const char *, void *), void *state)
223 {
224 #if 1
225 int max_matches = 1366; /* Match W2k - was 512. */
226 #else
227 int max_matches = 512;
228 #endif
229 int info_level;
230 char *p, *p2, *rdata_end;
231 char *mask = NULL;
232 file_info finfo;
233 int i;
234 char *dirlist = NULL;
235 int dirlist_len = 0;
236 int total_received = -1;
237 bool First = True;
238 int ff_searchcount=0;
239 int ff_eos=0;
240 int ff_dir_handle=0;
241 int loop_count = 0;
242 char *rparam=NULL, *rdata=NULL;
243 unsigned int param_len, data_len;
244 uint16 setup;
245 char *param;
246 const char *mnt;
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) {
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 mnt = cli_cm_get_mntpoint( cli );
460
461 /* see if the server disconnected or the connection otherwise failed */
462 if (cli_is_error(cli)) {
463 total_received = -1;
464 } else {
465 /* no connection problem. let user function add each entry */
466 rdata_end = dirlist + dirlist_len;
467 for (p=dirlist,i=0;i<total_received;i++) {
468 p += interpret_long_filename(frame,
469 cli,
470 info_level,
471 p,
472 rdata_end,
473 &finfo,
474 NULL,
475 NULL);
476 if (!finfo.name) {
477 DEBUG(0,("cli_list_new: unable to parse name from info level %d\n",
478 info_level));
479 break;
480 }
481 fn(mnt,&finfo, Mask, state);
482 }
483 }
484
485 /* free up the dirlist buffer and last name raw blob */
486 SAFE_FREE(dirlist);
487 data_blob_free(&last_name_raw);
488 SAFE_FREE(mask);
489 TALLOC_FREE(frame);
490 return(total_received);
491 }
492
493 /****************************************************************************
494 Interpret a short filename structure.
495 The length of the structure is returned.
496 ****************************************************************************/
497
498 static bool interpret_short_filename(TALLOC_CTX *ctx,
499 struct cli_state *cli,
500 char *p,
501 file_info *finfo)
502 {
503 size_t ret;
504 ZERO_STRUCTP(finfo);
505
506 finfo->cli = cli;
507 finfo->mode = CVAL(p,21);
508
509 /* this date is converted to GMT by make_unix_date */
510 finfo->ctime_ts.tv_sec = cli_make_unix_date(cli, p+22);
511 finfo->ctime_ts.tv_nsec = 0;
512 finfo->mtime_ts.tv_sec = finfo->atime_ts.tv_sec = finfo->ctime_ts.tv_sec;
513 finfo->mtime_ts.tv_nsec = finfo->atime_ts.tv_nsec = 0;
514 finfo->size = IVAL(p,26);
515 ret = clistr_pull_talloc(ctx,
516 cli,
517 &finfo->name,
518 p+30,
519 12,
520 STR_ASCII);
521 if (ret == (size_t)-1) {
522 return false;
523 }
524
525 if (finfo->name) {
526 strlcpy(finfo->short_name,
527 finfo->name,
528 sizeof(finfo->short_name));
529 }
530 return true;
531 return(DIR_STRUCT_SIZE);
532 }
533
534 /****************************************************************************
535 Do a directory listing, calling fn on each file found.
536 this uses the old SMBsearch interface. It is needed for testing Samba,
537 but should otherwise not be used.
538 ****************************************************************************/
539
540 int cli_list_old(struct cli_state *cli,const char *Mask,uint16 attribute,
541 void (*fn)(const char *, file_info *, const char *, void *), void *state)
542 {
543 char *p;
544 int received = 0;
545 bool first = True;
546 char status[21];
547 int num_asked = (cli->max_xmit - 100)/DIR_STRUCT_SIZE;
548 int num_received = 0;
549 int i;
550 char *dirlist = NULL;
551 char *mask = NULL;
552 TALLOC_CTX *frame = NULL;
553
554 ZERO_ARRAY(status);
555
556 mask = SMB_STRDUP(Mask);
557 if (!mask) {
558 return -1;
559 }
560
561 while (1) {
562 memset(cli->outbuf,'\0',smb_size);
563 memset(cli->inbuf,'\0',smb_size);
564
565 cli_set_message(cli->outbuf,2,0,True);
566
567 SCVAL(cli->outbuf,smb_com,SMBsearch);
568
569 SSVAL(cli->outbuf,smb_tid,cli->cnum);
570 cli_setup_packet(cli);
571
572 SSVAL(cli->outbuf,smb_vwv0,num_asked);
573 SSVAL(cli->outbuf,smb_vwv1,attribute);
574
575 p = smb_buf(cli->outbuf);
576 *p++ = 4;
577
578 p += clistr_push(cli, p, first?mask:"",
579 cli->bufsize - PTR_DIFF(p,cli->outbuf),
580 STR_TERMINATE);
581 *p++ = 5;
582 if (first) {
583 SSVAL(p,0,0);
584 p += 2;
585 } else {
586 SSVAL(p,0,21);
587 p += 2;
588 memcpy(p,status,21);
589 p += 21;
590 }
591
592 cli_setup_bcc(cli, p);
593 cli_send_smb(cli);
594 if (!cli_receive_smb(cli)) break;
595
596 received = SVAL(cli->inbuf,smb_vwv0);
597 if (received <= 0) break;
598
599 /* Ensure we received enough data. */
600 if ((cli->inbuf+4+smb_len(cli->inbuf) - (smb_buf(cli->inbuf)+3)) <
601 received*DIR_STRUCT_SIZE) {
602 break;
603 }
604
605 first = False;
606
607 dirlist = (char *)SMB_REALLOC(
608 dirlist,(num_received + received)*DIR_STRUCT_SIZE);
609 if (!dirlist) {
610 DEBUG(0,("cli_list_old: failed to expand dirlist"));
611 SAFE_FREE(mask);
612 return 0;
613 }
614
615 p = smb_buf(cli->inbuf) + 3;
616
617 memcpy(dirlist+num_received*DIR_STRUCT_SIZE,
618 p,received*DIR_STRUCT_SIZE);
619
620 memcpy(status,p + ((received-1)*DIR_STRUCT_SIZE),21);
621
622 num_received += received;
623
624 if (cli_is_error(cli)) break;
625 }
626
627 if (!first) {
628 memset(cli->outbuf,'\0',smb_size);
629 memset(cli->inbuf,'\0',smb_size);
630
631 cli_set_message(cli->outbuf,2,0,True);
632 SCVAL(cli->outbuf,smb_com,SMBfclose);
633 SSVAL(cli->outbuf,smb_tid,cli->cnum);
634 cli_setup_packet(cli);
635
636 SSVAL(cli->outbuf, smb_vwv0, 0); /* find count? */
637 SSVAL(cli->outbuf, smb_vwv1, attribute);
638
639 p = smb_buf(cli->outbuf);
640 *p++ = 4;
641 fstrcpy(p, "");
642 p += strlen(p) + 1;
643 *p++ = 5;
644 SSVAL(p, 0, 21);
645 p += 2;
646 memcpy(p,status,21);
647 p += 21;
648
649 cli_setup_bcc(cli, p);
650 cli_send_smb(cli);
651 if (!cli_receive_smb(cli)) {
652 DEBUG(0,("Error closing search: %s\n",cli_errstr(cli)));
653 }
654 }
655
656 frame = talloc_stackframe();
657 for (p=dirlist,i=0;i<num_received;i++) {
658 file_info finfo;
659 if (!interpret_short_filename(frame, cli, p, &finfo)) {
660 break;
661 }
662 p += DIR_STRUCT_SIZE;
663 fn("\\", &finfo, Mask, state);
664 }
665 TALLOC_FREE(frame);
666
667 SAFE_FREE(mask);
668 SAFE_FREE(dirlist);
669 return(num_received);
670 }
671
672 /****************************************************************************
673 Do a directory listing, calling fn on each file found.
674 This auto-switches between old and new style.
675 ****************************************************************************/
676
677 int cli_list(struct cli_state *cli,const char *Mask,uint16 attribute,
678 void (*fn)(const char *, file_info *, const char *, void *), void *state)
679 {
680 if (cli->protocol <= PROTOCOL_LANMAN1)
681 return cli_list_old(cli, Mask, attribute, fn, state);
682 return cli_list_new(cli, Mask, attribute, fn, state);
683 }
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