source: branches/samba-3.5.x/source3/libsmb/clilist.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 15 years ago

Samba 3.5.0: Initial import
File size: 17.7 KB
Line 
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
26static 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.
42 SMB_FIND_FILE_BOTH_DIRECTORY_INFO is used
43 by NT and SMB_FIND_EA_SIZE is used by OS/2
44****************************************************************************/
45
46static size_t interpret_long_filename(TALLOC_CTX *ctx,
47 struct cli_state *cli,
48 int level,
49 const char *p,
50 const char *pdata_end,
51 file_info *finfo,
52 uint32 *p_resume_key,
53 DATA_BLOB *p_last_name_raw)
54{
55 int len;
56 size_t ret;
57 const char *base = p;
58
59 data_blob_free(p_last_name_raw);
60
61 if (p_resume_key) {
62 *p_resume_key = 0;
63 }
64 ZERO_STRUCTP(finfo);
65 finfo->cli = cli;
66
67 switch (level) {
68 case SMB_FIND_INFO_STANDARD: /* OS/2 understands this */
69 /* these dates are converted to GMT by
70 make_unix_date */
71 if (pdata_end - base < 27) {
72 return pdata_end - base;
73 }
74 finfo->ctime_ts = convert_time_t_to_timespec(cli_make_unix_date2(cli, p+4));
75 finfo->atime_ts = convert_time_t_to_timespec(cli_make_unix_date2(cli, p+8));
76 finfo->mtime_ts = convert_time_t_to_timespec(cli_make_unix_date2(cli, p+12));
77 finfo->size = IVAL(p,16);
78 finfo->mode = CVAL(p,24);
79 len = CVAL(p, 26);
80 p += 27;
81 p += clistr_align_in(cli, p, 0);
82
83 /* We can safely use len here (which is required by OS/2)
84 * and the NAS-BASIC server instead of +2 or +1 as the
85 * STR_TERMINATE flag below is
86 * actually used as the length calculation.
87 * The len is merely an upper bound.
88 * Due to the explicit 2 byte null termination
89 * in cli_receive_trans/cli_receive_nt_trans
90 * we know this is safe. JRA + kukks
91 */
92
93 if (p + len > pdata_end) {
94 return pdata_end - base;
95 }
96
97 /* the len+2 below looks strange but it is
98 important to cope with the differences
99 between win2000 and win9x for this call
100 (tridge) */
101 ret = clistr_pull_talloc(ctx,
102 cli->inbuf,
103 &finfo->name,
104 p,
105 len+2,
106 STR_TERMINATE);
107 if (ret == (size_t)-1) {
108 return pdata_end - base;
109 }
110 p += ret;
111 return PTR_DIFF(p, base);
112
113 case SMB_FIND_EA_SIZE: /* this is what OS/2 uses mostly */
114 /* these dates are converted to GMT by
115 make_unix_date */
116 if (pdata_end - base < 31) {
117 return pdata_end - base;
118 }
119 finfo->ctime_ts = convert_time_t_to_timespec(cli_make_unix_date2(cli, p+4));
120 finfo->atime_ts = convert_time_t_to_timespec(cli_make_unix_date2(cli, p+8));
121 finfo->mtime_ts = convert_time_t_to_timespec(cli_make_unix_date2(cli, p+12));
122 finfo->size = IVAL(p,16);
123 finfo->mode = CVAL(p,24);
124 len = CVAL(p, 30);
125 p += 31;
126 /* check for unisys! */
127 if (p + len + 1 > pdata_end) {
128 return pdata_end - base;
129 }
130 ret = clistr_pull_talloc(ctx,
131 cli->inbuf,
132 &finfo->name,
133 p,
134 len,
135 STR_NOALIGN);
136 if (ret == (size_t)-1) {
137 return pdata_end - base;
138 }
139 p += ret;
140 return PTR_DIFF(p, base) + 1;
141
142 case SMB_FIND_FILE_BOTH_DIRECTORY_INFO: /* NT uses this, but also accepts 2 */
143 {
144 size_t namelen, slen;
145
146 if (pdata_end - base < 94) {
147 return pdata_end - base;
148 }
149
150 p += 4; /* next entry offset */
151
152 if (p_resume_key) {
153 *p_resume_key = IVAL(p,0);
154 }
155 p += 4; /* fileindex */
156
157 /* Offset zero is "create time", not "change time". */
158 p += 8;
159 finfo->atime_ts = interpret_long_date(p);
160 p += 8;
161 finfo->mtime_ts = interpret_long_date(p);
162 p += 8;
163 finfo->ctime_ts = interpret_long_date(p);
164 p += 8;
165 finfo->size = IVAL2_TO_SMB_BIG_UINT(p,0);
166 p += 8;
167 p += 8; /* alloc size */
168 finfo->mode = CVAL(p,0);
169 p += 4;
170 namelen = IVAL(p,0);
171 p += 4;
172 p += 4; /* EA size */
173 slen = SVAL(p, 0);
174 if (slen > 24) {
175 /* Bad short name length. */
176 return pdata_end - base;
177 }
178 p += 2;
179 {
180 /* stupid NT bugs. grr */
181 int flags = 0;
182 if (p[1] == 0 && namelen > 1) flags |= STR_UNICODE;
183 clistr_pull(cli->inbuf, finfo->short_name, p,
184 sizeof(finfo->short_name),
185 slen, flags);
186 }
187 p += 24; /* short name? */
188 if (p + namelen < p || p + namelen > pdata_end) {
189 return pdata_end - base;
190 }
191 ret = clistr_pull_talloc(ctx,
192 cli->inbuf,
193 &finfo->name,
194 p,
195 namelen,
196 0);
197 if (ret == (size_t)-1) {
198 return pdata_end - base;
199 }
200
201 /* To be robust in the face of unicode conversion failures
202 we need to copy the raw bytes of the last name seen here.
203 Namelen doesn't include the terminating unicode null, so
204 copy it here. */
205
206 if (p_last_name_raw) {
207 *p_last_name_raw = data_blob(NULL, namelen+2);
208 memcpy(p_last_name_raw->data, p, namelen);
209 SSVAL(p_last_name_raw->data, namelen, 0);
210 }
211 return calc_next_entry_offset(base, pdata_end);
212 }
213 }
214
215 DEBUG(1,("Unknown long filename format %d\n",level));
216 return calc_next_entry_offset(base, pdata_end);
217}
218
219/****************************************************************************
220 Do a directory listing, calling fn on each file found.
221****************************************************************************/
222
223int cli_list_new(struct cli_state *cli,const char *Mask,uint16 attribute,
224 void (*fn)(const char *, file_info *, const char *, void *), void *state)
225{
226#if 1
227 int max_matches = 1366; /* Match W2k - was 512. */
228#else
229 int max_matches = 512;
230#endif
231 int info_level;
232 char *p, *p2, *rdata_end;
233 char *mask = NULL;
234 file_info finfo;
235 int i;
236 char *dirlist = NULL;
237 int dirlist_len = 0;
238 int total_received = -1;
239 bool First = True;
240 int ff_searchcount=0;
241 int ff_eos=0;
242 int ff_dir_handle=0;
243 int loop_count = 0;
244 char *rparam=NULL, *rdata=NULL;
245 unsigned int param_len, data_len;
246 uint16 setup;
247 char *param;
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 SMB_FIND_FILE_BOTH_DIRECTORY_INFO,
253 OS/2 uses SMB_FIND_EA_SIZE. Both accept SMB_FIND_INFO_STANDARD. */
254 info_level = (cli->capabilities&CAP_NT_SMBS)?
255 SMB_FIND_FILE_BOTH_DIRECTORY_INFO : SMB_FIND_INFO_STANDARD;
256
257 mask = SMB_STRDUP(Mask);
258 if (!mask) {
259 TALLOC_FREE(frame);
260 return -1;
261 }
262
263 while (ff_eos == 0) {
264 size_t nlen = 2*(strlen(mask)+1);
265
266 loop_count++;
267 if (loop_count > 200) {
268 DEBUG(0,("Error: Looping in FIND_NEXT??\n"));
269 break;
270 }
271
272 param = SMB_MALLOC_ARRAY(char, 12+nlen+last_name_raw.length+2);
273 if (!param) {
274 break;
275 }
276
277 if (First) {
278 setup = TRANSACT2_FINDFIRST;
279 SSVAL(param,0,attribute); /* attribute */
280 SSVAL(param,2,max_matches); /* max count */
281 SSVAL(param,4,(FLAG_TRANS2_FIND_REQUIRE_RESUME|FLAG_TRANS2_FIND_CLOSE_IF_END)); /* resume required + close on end */
282 SSVAL(param,6,info_level);
283 SIVAL(param,8,0);
284 p = param+12;
285 p += clistr_push(cli, param+12, mask,
286 nlen, STR_TERMINATE);
287 } else {
288 setup = TRANSACT2_FINDNEXT;
289 SSVAL(param,0,ff_dir_handle);
290 SSVAL(param,2,max_matches); /* max count */
291 SSVAL(param,4,info_level);
292 /* For W2K servers serving out FAT filesystems we *must* set the
293 resume key. If it's not FAT then it's returned as zero. */
294 SIVAL(param,6,resume_key); /* ff_resume_key */
295 /* NB. *DON'T* use continue here. If you do it seems that W2K and bretheren
296 can miss filenames. Use last filename continue instead. JRA */
297 SSVAL(param,10,(FLAG_TRANS2_FIND_REQUIRE_RESUME|FLAG_TRANS2_FIND_CLOSE_IF_END)); /* resume required + close on end */
298 p = param+12;
299 if (last_name_raw.length) {
300 memcpy(p, last_name_raw.data, last_name_raw.length);
301 p += last_name_raw.length;
302 } else {
303 p += clistr_push(cli, param+12, mask,
304 nlen, STR_TERMINATE);
305 }
306 }
307
308 param_len = PTR_DIFF(p, param);
309
310 if (!cli_send_trans(cli, SMBtrans2,
311 NULL, /* Name */
312 -1, 0, /* fid, flags */
313 &setup, 1, 0, /* setup, length, max */
314 param, param_len, 10, /* param, length, max */
315 NULL, 0,
316#if 0
317 /* w2k value. */
318 MIN(16384,cli->max_xmit) /* data, length, max. */
319#else
320 cli->max_xmit /* data, length, max. */
321#endif
322 )) {
323 SAFE_FREE(param);
324 TALLOC_FREE(frame);
325 break;
326 }
327
328 SAFE_FREE(param);
329
330 if (!cli_receive_trans(cli, SMBtrans2,
331 &rparam, &param_len,
332 &rdata, &data_len) &&
333 cli_is_dos_error(cli)) {
334 /* We need to work around a Win95 bug - sometimes
335 it gives ERRSRV/ERRerror temprarily */
336 uint8 eclass;
337 uint32 ecode;
338
339 SAFE_FREE(rdata);
340 SAFE_FREE(rparam);
341
342 cli_dos_error(cli, &eclass, &ecode);
343
344 /*
345 * OS/2 might return "no more files",
346 * which just tells us, that searchcount is zero
347 * in this search.
348 * Guenter Kukkukk <linux@kukkukk.com>
349 */
350
351 if (eclass == ERRDOS && ecode == ERRnofiles) {
352 ff_searchcount = 0;
353 cli_reset_error(cli);
354 break;
355 }
356
357 if (eclass != ERRSRV || ecode != ERRerror)
358 break;
359 smb_msleep(100);
360 continue;
361 }
362
363 if (cli_is_error(cli) || !rdata || !rparam) {
364 SAFE_FREE(rdata);
365 SAFE_FREE(rparam);
366 break;
367 }
368
369 if (total_received == -1)
370 total_received = 0;
371
372 /* parse out some important return info */
373 p = rparam;
374 if (First) {
375 ff_dir_handle = SVAL(p,0);
376 ff_searchcount = SVAL(p,2);
377 ff_eos = SVAL(p,4);
378 } else {
379 ff_searchcount = SVAL(p,0);
380 ff_eos = SVAL(p,2);
381 }
382
383 if (ff_searchcount == 0) {
384 SAFE_FREE(rdata);
385 SAFE_FREE(rparam);
386 break;
387 }
388
389 /* point to the data bytes */
390 p = rdata;
391 rdata_end = rdata + data_len;
392
393 /* we might need the lastname for continuations */
394 for (p2=p,i=0;i<ff_searchcount && p2 < rdata_end;i++) {
395 if ((info_level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) &&
396 (i == ff_searchcount-1)) {
397 /* Last entry - fixup the last offset length. */
398 SIVAL(p2,0,PTR_DIFF((rdata + data_len),p2));
399 }
400 p2 += interpret_long_filename(frame,
401 cli,
402 info_level,
403 p2,
404 rdata_end,
405 &finfo,
406 &resume_key,
407 &last_name_raw);
408
409 if (!finfo.name) {
410 DEBUG(0,("cli_list_new: Error: unable to parse name from info level %d\n",
411 info_level));
412 ff_eos = 1;
413 break;
414 }
415 if (!First && *mask && strcsequal(finfo.name, mask)) {
416 DEBUG(0,("Error: Looping in FIND_NEXT as name %s has already been seen?\n",
417 finfo.name));
418 ff_eos = 1;
419 break;
420 }
421 }
422
423 SAFE_FREE(mask);
424 if (ff_searchcount > 0 && ff_eos == 0 && finfo.name) {
425 mask = SMB_STRDUP(finfo.name);
426 } else {
427 mask = SMB_STRDUP("");
428 }
429 if (!mask) {
430 SAFE_FREE(rdata);
431 SAFE_FREE(rparam);
432 break;
433 }
434
435 /* grab the data for later use */
436 /* and add them to the dirlist pool */
437 dirlist = (char *)SMB_REALLOC(dirlist,dirlist_len + data_len);
438
439 if (!dirlist) {
440 DEBUG(0,("cli_list_new: Failed to expand dirlist\n"));
441 SAFE_FREE(rdata);
442 SAFE_FREE(rparam);
443 break;
444 }
445
446 memcpy(dirlist+dirlist_len,p,data_len);
447 dirlist_len += data_len;
448
449 total_received += ff_searchcount;
450
451 SAFE_FREE(rdata);
452 SAFE_FREE(rparam);
453
454 DEBUG(3,("received %d entries (eos=%d)\n",
455 ff_searchcount,ff_eos));
456
457 if (ff_searchcount > 0)
458 loop_count = 0;
459
460 First = False;
461 }
462
463 /* see if the server disconnected or the connection otherwise failed */
464 if (cli_is_error(cli)) {
465 total_received = -1;
466 } else {
467 /* no connection problem. let user function add each entry */
468 rdata_end = dirlist + dirlist_len;
469 for (p=dirlist,i=0;i<total_received;i++) {
470 p += interpret_long_filename(frame,
471 cli,
472 info_level,
473 p,
474 rdata_end,
475 &finfo,
476 NULL,
477 NULL);
478 if (!finfo.name) {
479 DEBUG(0,("cli_list_new: unable to parse name from info level %d\n",
480 info_level));
481 break;
482 }
483 fn(cli->dfs_mountpoint, &finfo, Mask, state);
484 }
485 }
486
487 /* free up the dirlist buffer and last name raw blob */
488 SAFE_FREE(dirlist);
489 data_blob_free(&last_name_raw);
490 SAFE_FREE(mask);
491 TALLOC_FREE(frame);
492 return(total_received);
493}
494
495/****************************************************************************
496 Interpret a short filename structure.
497 The length of the structure is returned.
498****************************************************************************/
499
500static bool interpret_short_filename(TALLOC_CTX *ctx,
501 struct cli_state *cli,
502 char *p,
503 file_info *finfo)
504{
505 size_t ret;
506 ZERO_STRUCTP(finfo);
507
508 finfo->cli = cli;
509 finfo->mode = CVAL(p,21);
510
511 /* this date is converted to GMT by make_unix_date */
512 finfo->ctime_ts.tv_sec = cli_make_unix_date(cli, p+22);
513 finfo->ctime_ts.tv_nsec = 0;
514 finfo->mtime_ts.tv_sec = finfo->atime_ts.tv_sec = finfo->ctime_ts.tv_sec;
515 finfo->mtime_ts.tv_nsec = finfo->atime_ts.tv_nsec = 0;
516 finfo->size = IVAL(p,26);
517 ret = clistr_pull_talloc(ctx,
518 cli->inbuf,
519 &finfo->name,
520 p+30,
521 12,
522 STR_ASCII);
523 if (ret == (size_t)-1) {
524 return false;
525 }
526
527 if (finfo->name) {
528 strlcpy(finfo->short_name,
529 finfo->name,
530 sizeof(finfo->short_name));
531 }
532 return true;
533 return(DIR_STRUCT_SIZE);
534}
535
536/****************************************************************************
537 Do a directory listing, calling fn on each file found.
538 this uses the old SMBsearch interface. It is needed for testing Samba,
539 but should otherwise not be used.
540****************************************************************************/
541
542int cli_list_old(struct cli_state *cli,const char *Mask,uint16 attribute,
543 void (*fn)(const char *, file_info *, const char *, void *), void *state)
544{
545 char *p;
546 int received = 0;
547 bool first = True;
548 char status[21];
549 int num_asked = (cli->max_xmit - 100)/DIR_STRUCT_SIZE;
550 int num_received = 0;
551 int i;
552 char *dirlist = NULL;
553 char *mask = NULL;
554 TALLOC_CTX *frame = NULL;
555
556 ZERO_ARRAY(status);
557
558 mask = SMB_STRDUP(Mask);
559 if (!mask) {
560 return -1;
561 }
562
563 while (1) {
564 memset(cli->outbuf,'\0',smb_size);
565 memset(cli->inbuf,'\0',smb_size);
566
567 cli_set_message(cli->outbuf,2,0,True);
568
569 SCVAL(cli->outbuf,smb_com,SMBsearch);
570
571 SSVAL(cli->outbuf,smb_tid,cli->cnum);
572 cli_setup_packet(cli);
573
574 SSVAL(cli->outbuf,smb_vwv0,num_asked);
575 SSVAL(cli->outbuf,smb_vwv1,attribute);
576
577 p = smb_buf(cli->outbuf);
578 *p++ = 4;
579
580 p += clistr_push(cli, p, first?mask:"",
581 cli->bufsize - PTR_DIFF(p,cli->outbuf),
582 STR_TERMINATE);
583 *p++ = 5;
584 if (first) {
585 SSVAL(p,0,0);
586 p += 2;
587 } else {
588 SSVAL(p,0,21);
589 p += 2;
590 memcpy(p,status,21);
591 p += 21;
592 }
593
594 cli_setup_bcc(cli, p);
595 cli_send_smb(cli);
596 if (!cli_receive_smb(cli)) break;
597
598 received = SVAL(cli->inbuf,smb_vwv0);
599 if (received <= 0) break;
600
601 /* Ensure we received enough data. */
602 if ((cli->inbuf+4+smb_len(cli->inbuf) - (smb_buf(cli->inbuf)+3)) <
603 received*DIR_STRUCT_SIZE) {
604 break;
605 }
606
607 first = False;
608
609 dirlist = (char *)SMB_REALLOC(
610 dirlist,(num_received + received)*DIR_STRUCT_SIZE);
611 if (!dirlist) {
612 DEBUG(0,("cli_list_old: failed to expand dirlist"));
613 SAFE_FREE(mask);
614 return 0;
615 }
616
617 p = smb_buf(cli->inbuf) + 3;
618
619 memcpy(dirlist+num_received*DIR_STRUCT_SIZE,
620 p,received*DIR_STRUCT_SIZE);
621
622 memcpy(status,p + ((received-1)*DIR_STRUCT_SIZE),21);
623
624 num_received += received;
625
626 if (cli_is_error(cli)) break;
627 }
628
629 if (!first) {
630 memset(cli->outbuf,'\0',smb_size);
631 memset(cli->inbuf,'\0',smb_size);
632
633 cli_set_message(cli->outbuf,2,0,True);
634 SCVAL(cli->outbuf,smb_com,SMBfclose);
635 SSVAL(cli->outbuf,smb_tid,cli->cnum);
636 cli_setup_packet(cli);
637
638 SSVAL(cli->outbuf, smb_vwv0, 0); /* find count? */
639 SSVAL(cli->outbuf, smb_vwv1, attribute);
640
641 p = smb_buf(cli->outbuf);
642 *p++ = 4;
643 fstrcpy(p, "");
644 p += strlen(p) + 1;
645 *p++ = 5;
646 SSVAL(p, 0, 21);
647 p += 2;
648 memcpy(p,status,21);
649 p += 21;
650
651 cli_setup_bcc(cli, p);
652 cli_send_smb(cli);
653 if (!cli_receive_smb(cli)) {
654 DEBUG(0,("Error closing search: %s\n",cli_errstr(cli)));
655 }
656 }
657
658 frame = talloc_stackframe();
659 for (p=dirlist,i=0;i<num_received;i++) {
660 file_info finfo;
661 if (!interpret_short_filename(frame, cli, p, &finfo)) {
662 break;
663 }
664 p += DIR_STRUCT_SIZE;
665 fn("\\", &finfo, Mask, state);
666 }
667 TALLOC_FREE(frame);
668
669 SAFE_FREE(mask);
670 SAFE_FREE(dirlist);
671 return(num_received);
672}
673
674/****************************************************************************
675 Do a directory listing, calling fn on each file found.
676 This auto-switches between old and new style.
677****************************************************************************/
678
679int cli_list(struct cli_state *cli,const char *Mask,uint16 attribute,
680 void (*fn)(const char *, file_info *, const char *, void *), void *state)
681{
682 if (cli->protocol <= PROTOCOL_LANMAN1)
683 return cli_list_old(cli, Mask, attribute, fn, state);
684 return cli_list_new(cli, Mask, attribute, fn, state);
685}
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