← Back to branch summary

~zulcss/samba/server-dailies-3.4

« back to all changes in this revision

Viewing changes to source3/libsmb/clidfs.c

  • Committer: Chuck Short
  • Date: 2010-09-28 20:38:39 UTC
  • Revision ID: zulcss@ubuntu.com-20100928203839-pgjulytsi9ue63x1
Initial version

Show diffs side-by-side

added added

removed removed

Lines of Context:
source3/libsmb/clidfs.c
 
1
/*
 
2
   Unix SMB/CIFS implementation.
 
3
   client connect/disconnect routines
 
4
   Copyright (C) Andrew Tridgell                  1994-1998
 
5
   Copyright (C) Gerald (Jerry) Carter            2004
 
6
   Copyright (C) Jeremy Allison                   2007-2009
 
7
 
 
8
   This program is free software; you can redistribute it and/or modify
 
9
   it under the terms of the GNU General Public License as published by
 
10
   the Free Software Foundation; either version 3 of the License, or
 
11
   (at your option) any later version.
 
12
 
 
13
   This program is distributed in the hope that it will be useful,
 
14
   but WITHOUT ANY WARRANTY; without even the implied warranty of
 
15
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
16
   GNU General Public License for more details.
 
17
 
 
18
   You should have received a copy of the GNU General Public License
 
19
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
20
*/
 
21
 
 
22
#include "includes.h"
 
23
 
 
24
/********************************************************************
 
25
 Important point.
 
26
 
 
27
 DFS paths are *always* of the form \server\share\<pathname> (the \ characters
 
28
 are not C escaped here).
 
29
 
 
30
 - but if we're using POSIX paths then <pathname> may contain
 
31
   '/' separators, not '\\' separators. So cope with '\\' or '/'
 
32
   as a separator when looking at the pathname part.... JRA.
 
33
********************************************************************/
 
34
 
 
35
static bool cli_check_msdfs_proxy(TALLOC_CTX *ctx,
 
36
                                struct cli_state *cli,
 
37
                                const char *sharename,
 
38
                                char **pp_newserver,
 
39
                                char **pp_newshare,
 
40
                                bool force_encrypt,
 
41
                                const char *username,
 
42
                                const char *password,
 
43
                                const char *domain);
 
44
 
 
45
/********************************************************************
 
46
 Ensure a connection is encrypted.
 
47
********************************************************************/
 
48
 
 
49
NTSTATUS cli_cm_force_encryption(struct cli_state *c,
 
50
                        const char *username,
 
51
                        const char *password,
 
52
                        const char *domain,
 
53
                        const char *sharename)
 
54
{
 
55
        NTSTATUS status = cli_force_encryption(c,
 
56
                                        username,
 
57
                                        password,
 
58
                                        domain);
 
59
 
 
60
        if (NT_STATUS_EQUAL(status,NT_STATUS_NOT_SUPPORTED)) {
 
61
                d_printf("Encryption required and "
 
62
                        "server that doesn't support "
 
63
                        "UNIX extensions - failing connect\n");
 
64
        } else if (NT_STATUS_EQUAL(status,NT_STATUS_UNKNOWN_REVISION)) {
 
65
                d_printf("Encryption required and "
 
66
                        "can't get UNIX CIFS extensions "
 
67
                        "version from server.\n");
 
68
        } else if (NT_STATUS_EQUAL(status,NT_STATUS_UNSUPPORTED_COMPRESSION)) {
 
69
                d_printf("Encryption required and "
 
70
                        "share %s doesn't support "
 
71
                        "encryption.\n", sharename);
 
72
        } else if (!NT_STATUS_IS_OK(status)) {
 
73
                d_printf("Encryption required and "
 
74
                        "setup failed with error %s.\n",
 
75
                        nt_errstr(status));
 
76
        }
 
77
 
 
78
        return status;
 
79
}
 
80
 
 
81
/********************************************************************
 
82
 Return a connection to a server.
 
83
********************************************************************/
 
84
 
 
85
static struct cli_state *do_connect(TALLOC_CTX *ctx,
 
86
                                        const char *server,
 
87
                                        const char *share,
 
88
                                        const struct user_auth_info *auth_info,
 
89
                                        bool show_sessetup,
 
90
                                        bool force_encrypt,
 
91
                                        int max_protocol,
 
92
                                        int port,
 
93
                                        int name_type)
 
94
{
 
95
        struct cli_state *c = NULL;
 
96
        struct nmb_name called, calling;
 
97
        const char *called_str;
 
98
        const char *server_n;
 
99
        struct sockaddr_storage ss;
 
100
        char *servicename;
 
101
        char *sharename;
 
102
        char *newserver, *newshare;
 
103
        const char *username;
 
104
        const char *password;
 
105
        NTSTATUS status;
 
106
 
 
107
        /* make a copy so we don't modify the global string 'service' */
 
108
        servicename = talloc_strdup(ctx,share);
 
109
        if (!servicename) {
 
110
                return NULL;
 
111
        }
 
112
        sharename = servicename;
 
113
        if (*sharename == '\\') {
 
114
                sharename += 2;
 
115
                called_str = sharename;
 
116
                if (server == NULL) {
 
117
                        server = sharename;
 
118
                }
 
119
                sharename = strchr_m(sharename,'\\');
 
120
                if (!sharename) {
 
121
                        return NULL;
 
122
                }
 
123
                *sharename = 0;
 
124
                sharename++;
 
125
        } else {
 
126
                called_str = server;
 
127
        }
 
128
 
 
129
        server_n = server;
 
130
 
 
131
        zero_sockaddr(&ss);
 
132
 
 
133
        make_nmb_name(&calling, global_myname(), 0x0);
 
134
        make_nmb_name(&called , called_str, name_type);
 
135
 
 
136
 again:
 
137
        zero_sockaddr(&ss);
 
138
 
 
139
        /* have to open a new connection */
 
140
        if (!(c=cli_initialise_ex(get_cmdline_auth_info_signing_state(auth_info)))) {
 
141
                d_printf("Connection to %s failed\n", server_n);
 
142
                if (c) {
 
143
                        cli_shutdown(c);
 
144
                }
 
145
                return NULL;
 
146
        }
 
147
        if (port) {
 
148
                cli_set_port(c, port);
 
149
        }
 
150
 
 
151
        status = cli_connect(c, server_n, &ss);
 
152
        if (!NT_STATUS_IS_OK(status)) {
 
153
                d_printf("Connection to %s failed (Error %s)\n",
 
154
                                server_n,
 
155
                                nt_errstr(status));
 
156
                cli_shutdown(c);
 
157
                return NULL;
 
158
        }
 
159
 
 
160
        if (max_protocol == 0) {
 
161
                max_protocol = PROTOCOL_NT1;
 
162
        }
 
163
        c->protocol = max_protocol;
 
164
        c->use_kerberos = get_cmdline_auth_info_use_kerberos(auth_info);
 
165
        c->fallback_after_kerberos =
 
166
                get_cmdline_auth_info_fallback_after_kerberos(auth_info);
 
167
 
 
168
        if (!cli_session_request(c, &calling, &called)) {
 
169
                char *p;
 
170
                d_printf("session request to %s failed (%s)\n",
 
171
                         called.name, cli_errstr(c));
 
172
                cli_shutdown(c);
 
173
                c = NULL;
 
174
                if ((p=strchr_m(called.name, '.'))) {
 
175
                        *p = 0;
 
176
                        goto again;
 
177
                }
 
178
                if (strcmp(called.name, "*SMBSERVER")) {
 
179
                        make_nmb_name(&called , "*SMBSERVER", 0x20);
 
180
                        goto again;
 
181
                }
 
182
                return NULL;
 
183
        }
 
184
 
 
185
        DEBUG(4,(" session request ok\n"));
 
186
 
 
187
        status = cli_negprot(c);
 
188
 
 
189
        if (!NT_STATUS_IS_OK(status)) {
 
190
                d_printf("protocol negotiation failed: %s\n",
 
191
                         nt_errstr(status));
 
192
                cli_shutdown(c);
 
193
                return NULL;
 
194
        }
 
195
 
 
196
        username = get_cmdline_auth_info_username(auth_info);
 
197
        password = get_cmdline_auth_info_password(auth_info);
 
198
 
 
199
        if (!NT_STATUS_IS_OK(cli_session_setup(c, username,
 
200
                                               password, strlen(password),
 
201
                                               password, strlen(password),
 
202
                                               lp_workgroup()))) {
 
203
                /* If a password was not supplied then
 
204
                 * try again with a null username. */
 
205
                if (password[0] || !username[0] ||
 
206
                        get_cmdline_auth_info_use_kerberos(auth_info) ||
 
207
                        !NT_STATUS_IS_OK(cli_session_setup(c, "",
 
208
                                                "", 0,
 
209
                                                "", 0,
 
210
                                               lp_workgroup()))) {
 
211
                        d_printf("session setup failed: %s\n", cli_errstr(c));
 
212
                        if (NT_STATUS_V(cli_nt_error(c)) ==
 
213
                            NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED))
 
214
                                d_printf("did you forget to run kinit?\n");
 
215
                        cli_shutdown(c);
 
216
                        return NULL;
 
217
                }
 
218
                d_printf("Anonymous login successful\n");
 
219
                status = cli_init_creds(c, "", lp_workgroup(), "");
 
220
        } else {
 
221
                status = cli_init_creds(c, username, lp_workgroup(), password);
 
222
        }
 
223
 
 
224
        if (!NT_STATUS_IS_OK(status)) {
 
225
                DEBUG(10,("cli_init_creds() failed: %s\n", nt_errstr(status)));
 
226
                cli_shutdown(c);
 
227
                return NULL;
 
228
        }
 
229
 
 
230
        if ( show_sessetup ) {
 
231
                if (*c->server_domain) {
 
232
                        DEBUG(0,("Domain=[%s] OS=[%s] Server=[%s]\n",
 
233
                                c->server_domain,c->server_os,c->server_type));
 
234
                } else if (*c->server_os || *c->server_type) {
 
235
                        DEBUG(0,("OS=[%s] Server=[%s]\n",
 
236
                                 c->server_os,c->server_type));
 
237
                }
 
238
        }
 
239
        DEBUG(4,(" session setup ok\n"));
 
240
 
 
241
        /* here's the fun part....to support 'msdfs proxy' shares
 
242
           (on Samba or windows) we have to issues a TRANS_GET_DFS_REFERRAL
 
243
           here before trying to connect to the original share.
 
244
           check_dfs_proxy() will fail if it is a normal share. */
 
245
 
 
246
        if ((c->capabilities & CAP_DFS) &&
 
247
                        cli_check_msdfs_proxy(ctx, c, sharename,
 
248
                                &newserver, &newshare,
 
249
                                force_encrypt,
 
250
                                username,
 
251
                                password,
 
252
                                lp_workgroup())) {
 
253
                cli_shutdown(c);
 
254
                return do_connect(ctx, newserver,
 
255
                                newshare, auth_info, false,
 
256
                                force_encrypt, max_protocol,
 
257
                                port, name_type);
 
258
        }
 
259
 
 
260
        /* must be a normal share */
 
261
 
 
262
        status = cli_tcon_andx(c, sharename, "?????",
 
263
                               password, strlen(password)+1);
 
264
        if (!NT_STATUS_IS_OK(status)) {
 
265
                d_printf("tree connect failed: %s\n", nt_errstr(status));
 
266
                cli_shutdown(c);
 
267
                return NULL;
 
268
        }
 
269
 
 
270
        if (force_encrypt) {
 
271
                status = cli_cm_force_encryption(c,
 
272
                                        username,
 
273
                                        password,
 
274
                                        lp_workgroup(),
 
275
                                        sharename);
 
276
                if (!NT_STATUS_IS_OK(status)) {
 
277
                        cli_shutdown(c);
 
278
                        return NULL;
 
279
                }
 
280
        }
 
281
 
 
282
        DEBUG(4,(" tconx ok\n"));
 
283
        return c;
 
284
}
 
285
 
 
286
/****************************************************************************
 
287
****************************************************************************/
 
288
 
 
289
static void cli_set_mntpoint(struct cli_state *cli, const char *mnt)
 
290
{
 
291
        char *name = clean_name(NULL, mnt);
 
292
        if (!name) {
 
293
                return;
 
294
        }
 
295
        TALLOC_FREE(cli->dfs_mountpoint);
 
296
        cli->dfs_mountpoint = talloc_strdup(cli, name);
 
297
        TALLOC_FREE(name);
 
298
}
 
299
 
 
300
/********************************************************************
 
301
 Add a new connection to the list.
 
302
 referring_cli == NULL means a new initial connection.
 
303
********************************************************************/
 
304
 
 
305
static struct cli_state *cli_cm_connect(TALLOC_CTX *ctx,
 
306
                                        struct cli_state *referring_cli,
 
307
                                        const char *server,
 
308
                                        const char *share,
 
309
                                        const struct user_auth_info *auth_info,
 
310
                                        bool show_hdr,
 
311
                                        bool force_encrypt,
 
312
                                        int max_protocol,
 
313
                                        int port,
 
314
                                        int name_type)
 
315
{
 
316
        struct cli_state *cli;
 
317
 
 
318
        cli = do_connect(ctx, server, share,
 
319
                                auth_info,
 
320
                                show_hdr, force_encrypt, max_protocol,
 
321
                                port, name_type);
 
322
 
 
323
        if (!cli ) {
 
324
                return NULL;
 
325
        }
 
326
 
 
327
        /* Enter into the list. */
 
328
        if (referring_cli) {
 
329
                DLIST_ADD_END(referring_cli, cli, struct cli_state *);
 
330
        }
 
331
 
 
332
        if (referring_cli && referring_cli->posix_capabilities) {
 
333
                uint16 major, minor;
 
334
                uint32 caplow, caphigh;
 
335
                if (cli_unix_extensions_version(cli, &major,
 
336
                                        &minor, &caplow, &caphigh)) {
 
337
                        cli_set_unix_extensions_capabilities(cli,
 
338
                                        major, minor,
 
339
                                        caplow, caphigh);
 
340
                }
 
341
        }
 
342
 
 
343
        return cli;
 
344
}
 
345
 
 
346
/********************************************************************
 
347
 Return a connection to a server on a particular share.
 
348
********************************************************************/
 
349
 
 
350
static struct cli_state *cli_cm_find(struct cli_state *cli,
 
351
                                const char *server,
 
352
                                const char *share)
 
353
{
 
354
        struct cli_state *p;
 
355
 
 
356
        if (cli == NULL) {
 
357
                return NULL;
 
358
        }
 
359
 
 
360
        /* Search to the start of the list. */
 
361
        for (p = cli; p; p = p->prev) {
 
362
                if (strequal(server, p->desthost) &&
 
363
                                strequal(share,p->share)) {
 
364
                        return p;
 
365
                }
 
366
        }
 
367
 
 
368
        /* Search to the end of the list. */
 
369
        for (p = cli->next; p; p = p->next) {
 
370
                if (strequal(server, p->desthost) &&
 
371
                                strequal(share,p->share)) {
 
372
                        return p;
 
373
                }
 
374
        }
 
375
 
 
376
        return NULL;
 
377
}
 
378
 
 
379
/****************************************************************************
 
380
 Open a client connection to a \\server\share.
 
381
****************************************************************************/
 
382
 
 
383
struct cli_state *cli_cm_open(TALLOC_CTX *ctx,
 
384
                                struct cli_state *referring_cli,
 
385
                                const char *server,
 
386
                                const char *share,
 
387
                                const struct user_auth_info *auth_info,
 
388
                                bool show_hdr,
 
389
                                bool force_encrypt,
 
390
                                int max_protocol,
 
391
                                int port,
 
392
                                int name_type)
 
393
{
 
394
        /* Try to reuse an existing connection in this list. */
 
395
        struct cli_state *c = cli_cm_find(referring_cli, server, share);
 
396
 
 
397
        if (c) {
 
398
                return c;
 
399
        }
 
400
 
 
401
        if (auth_info == NULL) {
 
402
                /* Can't do a new connection
 
403
                 * without auth info. */
 
404
                d_printf("cli_cm_open() Unable to open connection [\\%s\\%s] "
 
405
                        "without auth info\n",
 
406
                        server, share );
 
407
                return NULL;
 
408
        }
 
409
 
 
410
        return cli_cm_connect(ctx,
 
411
                                referring_cli,
 
412
                                server,
 
413
                                share,
 
414
                                auth_info,
 
415
                                show_hdr,
 
416
                                force_encrypt,
 
417
                                max_protocol,
 
418
                                port,
 
419
                                name_type);
 
420
}
 
421
 
 
422
/****************************************************************************
 
423
****************************************************************************/
 
424
 
 
425
void cli_cm_display(const struct cli_state *cli)
 
426
{
 
427
        int i;
 
428
 
 
429
        for (i=0; cli; cli = cli->next,i++ ) {
 
430
                d_printf("%d:\tserver=%s, share=%s\n",
 
431
                        i, cli->desthost, cli->share );
 
432
        }
 
433
}
 
434
 
 
435
/****************************************************************************
 
436
****************************************************************************/
 
437
 
 
438
/****************************************************************************
 
439
****************************************************************************/
 
440
 
 
441
#if 0
 
442
void cli_cm_set_credentials(struct user_auth_info *auth_info)
 
443
{
 
444
        SAFE_FREE(cm_creds.username);
 
445
        cm_creds.username = SMB_STRDUP(get_cmdline_auth_info_username(
 
446
                                               auth_info));
 
447
 
 
448
        if (get_cmdline_auth_info_got_pass(auth_info)) {
 
449
                cm_set_password(get_cmdline_auth_info_password(auth_info));
 
450
        }
 
451
 
 
452
        cm_creds.use_kerberos = get_cmdline_auth_info_use_kerberos(auth_info);
 
453
        cm_creds.fallback_after_kerberos = false;
 
454
        cm_creds.signing_state = get_cmdline_auth_info_signing_state(auth_info);
 
455
}
 
456
#endif
 
457
 
 
458
/**********************************************************************
 
459
 split a dfs path into the server, share name, and extrapath components
 
460
**********************************************************************/
 
461
 
 
462
static void split_dfs_path(TALLOC_CTX *ctx,
 
463
                                const char *nodepath,
 
464
                                char **pp_server,
 
465
                                char **pp_share,
 
466
                                char **pp_extrapath)
 
467
{
 
468
        char *p, *q;
 
469
        char *path;
 
470
 
 
471
        *pp_server = NULL;
 
472
        *pp_share = NULL;
 
473
        *pp_extrapath = NULL;
 
474
 
 
475
        path = talloc_strdup(ctx, nodepath);
 
476
        if (!path) {
 
477
                return;
 
478
        }
 
479
 
 
480
        if ( path[0] != '\\' ) {
 
481
                return;
 
482
        }
 
483
 
 
484
        p = strchr_m( path + 1, '\\' );
 
485
        if ( !p ) {
 
486
                return;
 
487
        }
 
488
 
 
489
        *p = '\0';
 
490
        p++;
 
491
 
 
492
        /* Look for any extra/deep path */
 
493
        q = strchr_m(p, '\\');
 
494
        if (q != NULL) {
 
495
                *q = '\0';
 
496
                q++;
 
497
                *pp_extrapath = talloc_strdup(ctx, q);
 
498
        } else {
 
499
                *pp_extrapath = talloc_strdup(ctx, "");
 
500
        }
 
501
 
 
502
        *pp_share = talloc_strdup(ctx, p);
 
503
        *pp_server = talloc_strdup(ctx, &path[1]);
 
504
}
 
505
 
 
506
/****************************************************************************
 
507
 Return the original path truncated at the directory component before
 
508
 the first wildcard character. Trust the caller to provide a NULL
 
509
 terminated string
 
510
****************************************************************************/
 
511
 
 
512
static char *clean_path(TALLOC_CTX *ctx, const char *path)
 
513
{
 
514
        size_t len;
 
515
        char *p1, *p2, *p;
 
516
        char *path_out;
 
517
 
 
518
        /* No absolute paths. */
 
519
        while (IS_DIRECTORY_SEP(*path)) {
 
520
                path++;
 
521
        }
 
522
 
 
523
        path_out = talloc_strdup(ctx, path);
 
524
        if (!path_out) {
 
525
                return NULL;
 
526
        }
 
527
 
 
528
        p1 = strchr_m(path_out, '*');
 
529
        p2 = strchr_m(path_out, '?');
 
530
 
 
531
        if (p1 || p2) {
 
532
                if (p1 && p2) {
 
533
                        p = MIN(p1,p2);
 
534
                } else if (!p1) {
 
535
                        p = p2;
 
536
                } else {
 
537
                        p = p1;
 
538
                }
 
539
                *p = '\0';
 
540
 
 
541
                /* Now go back to the start of this component. */
 
542
                p1 = strrchr_m(path_out, '/');
 
543
                p2 = strrchr_m(path_out, '\\');
 
544
                p = MAX(p1,p2);
 
545
                if (p) {
 
546
                        *p = '\0';
 
547
                }
 
548
        }
 
549
 
 
550
        /* Strip any trailing separator */
 
551
 
 
552
        len = strlen(path_out);
 
553
        if ( (len > 0) && IS_DIRECTORY_SEP(path_out[len-1])) {
 
554
                path_out[len-1] = '\0';
 
555
        }
 
556
 
 
557
        return path_out;
 
558
}
 
559
 
 
560
/****************************************************************************
 
561
****************************************************************************/
 
562
 
 
563
static char *cli_dfs_make_full_path(TALLOC_CTX *ctx,
 
564
                                        struct cli_state *cli,
 
565
                                        const char *dir)
 
566
{
 
567
        char path_sep = '\\';
 
568
 
 
569
        /* Ensure the extrapath doesn't start with a separator. */
 
570
        while (IS_DIRECTORY_SEP(*dir)) {
 
571
                dir++;
 
572
        }
 
573
 
 
574
        if (cli->posix_capabilities & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
 
575
                path_sep = '/';
 
576
        }
 
577
        return talloc_asprintf(ctx, "%c%s%c%s%c%s",
 
578
                        path_sep,
 
579
                        cli->desthost,
 
580
                        path_sep,
 
581
                        cli->share,
 
582
                        path_sep,
 
583
                        dir);
 
584
}
 
585
 
 
586
/********************************************************************
 
587
 check for dfs referral
 
588
********************************************************************/
 
589
 
 
590
static bool cli_dfs_check_error( struct cli_state *cli, NTSTATUS status )
 
591
{
 
592
        uint32 flgs2 = SVAL(cli->inbuf,smb_flg2);
 
593
 
 
594
        /* only deal with DS when we negotiated NT_STATUS codes and UNICODE */
 
595
 
 
596
        if (!((flgs2&FLAGS2_32_BIT_ERROR_CODES) &&
 
597
                                (flgs2&FLAGS2_UNICODE_STRINGS)))
 
598
                return false;
 
599
 
 
600
        if (NT_STATUS_EQUAL(status, NT_STATUS(IVAL(cli->inbuf,smb_rcls))))
 
601
                return true;
 
602
 
 
603
        return false;
 
604
}
 
605
 
 
606
/********************************************************************
 
607
 Get the dfs referral link.
 
608
********************************************************************/
 
609
 
 
610
bool cli_dfs_get_referral(TALLOC_CTX *ctx,
 
611
                        struct cli_state *cli,
 
612
                        const char *path,
 
613
                        CLIENT_DFS_REFERRAL**refs,
 
614
                        size_t *num_refs,
 
615
                        size_t *consumed)
 
616
{
 
617
        unsigned int data_len = 0;
 
618
        unsigned int param_len = 0;
 
619
        uint16 setup = TRANSACT2_GET_DFS_REFERRAL;
 
620
        char *param = NULL;
 
621
        char *rparam=NULL, *rdata=NULL;
 
622
        char *p;
 
623
        char *endp;
 
624
        size_t pathlen = 2*(strlen(path)+1);
 
625
        smb_ucs2_t *path_ucs;
 
626
        char *consumed_path = NULL;
 
627
        uint16_t consumed_ucs;
 
628
        uint16 num_referrals;
 
629
        CLIENT_DFS_REFERRAL *referrals = NULL;
 
630
        bool ret = false;
 
631
 
 
632
        *num_refs = 0;
 
633
        *refs = NULL;
 
634
 
 
635
        param = SMB_MALLOC_ARRAY(char, 2+pathlen+2);
 
636
        if (!param) {
 
637
                goto out;
 
638
        }
 
639
        SSVAL(param, 0, 0x03);  /* max referral level */
 
640
        p = &param[2];
 
641
 
 
642
        path_ucs = (smb_ucs2_t *)p;
 
643
        p += clistr_push(cli, p, path, pathlen, STR_TERMINATE);
 
644
        param_len = PTR_DIFF(p, param);
 
645
 
 
646
        if (!cli_send_trans(cli, SMBtrans2,
 
647
                        NULL,                        /* name */
 
648
                        -1, 0,                          /* fid, flags */
 
649
                        &setup, 1, 0,                   /* setup, length, max */
 
650
                        param, param_len, 2,            /* param, length, max */
 
651
                        NULL, 0, cli->max_xmit /* data, length, max */
 
652
                        )) {
 
653
                goto out;
 
654
        }
 
655
 
 
656
        if (!cli_receive_trans(cli, SMBtrans2,
 
657
                &rparam, &param_len,
 
658
                &rdata, &data_len)) {
 
659
                goto out;
 
660
        }
 
661
 
 
662
        if (data_len < 4) {
 
663
                goto out;
 
664
        }
 
665
 
 
666
        endp = rdata + data_len;
 
667
 
 
668
        consumed_ucs  = SVAL(rdata, 0);
 
669
        num_referrals = SVAL(rdata, 2);
 
670
 
 
671
        /* consumed_ucs is the number of bytes
 
672
         * of the UCS2 path consumed not counting any
 
673
         * terminating null. We need to convert
 
674
         * back to unix charset and count again
 
675
         * to get the number of bytes consumed from
 
676
         * the incoming path. */
 
677
 
 
678
        if (pull_string_talloc(talloc_tos(),
 
679
                        NULL,
 
680
                        0,
 
681
                        &consumed_path,
 
682
                        path_ucs,
 
683
                        consumed_ucs,
 
684
                        STR_UNICODE) == 0) {
 
685
                goto out;
 
686
        }
 
687
        if (consumed_path == NULL) {
 
688
                goto out;
 
689
        }
 
690
        *consumed = strlen(consumed_path);
 
691
 
 
692
        if (num_referrals != 0) {
 
693
                uint16 ref_version;
 
694
                uint16 ref_size;
 
695
                int i;
 
696
                uint16 node_offset;
 
697
 
 
698
                referrals = TALLOC_ARRAY(ctx, CLIENT_DFS_REFERRAL,
 
699
                                num_referrals);
 
700
 
 
701
                if (!referrals) {
 
702
                        goto out;
 
703
                }
 
704
                /* start at the referrals array */
 
705
 
 
706
                p = rdata+8;
 
707
                for (i=0; i<num_referrals && p < endp; i++) {
 
708
                        if (p + 18 > endp) {
 
709
                                goto out;
 
710
                        }
 
711
                        ref_version = SVAL(p, 0);
 
712
                        ref_size    = SVAL(p, 2);
 
713
                        node_offset = SVAL(p, 16);
 
714
 
 
715
                        if (ref_version != 3) {
 
716
                                p += ref_size;
 
717
                                continue;
 
718
                        }
 
719
 
 
720
                        referrals[i].proximity = SVAL(p, 8);
 
721
                        referrals[i].ttl       = SVAL(p, 10);
 
722
 
 
723
                        if (p + node_offset > endp) {
 
724
                                goto out;
 
725
                        }
 
726
                        clistr_pull_talloc(ctx, cli->inbuf,
 
727
                                           &referrals[i].dfspath,
 
728
                                           p+node_offset, -1,
 
729
                                           STR_TERMINATE|STR_UNICODE);
 
730
 
 
731
                        if (!referrals[i].dfspath) {
 
732
                                goto out;
 
733
                        }
 
734
                        p += ref_size;
 
735
                }
 
736
                if (i < num_referrals) {
 
737
                        goto out;
 
738
                }
 
739
        }
 
740
 
 
741
        ret = true;
 
742
 
 
743
        *num_refs = num_referrals;
 
744
        *refs = referrals;
 
745
 
 
746
  out:
 
747
 
 
748
        TALLOC_FREE(consumed_path);
 
749
        SAFE_FREE(param);
 
750
        SAFE_FREE(rdata);
 
751
        SAFE_FREE(rparam);
 
752
        return ret;
 
753
}
 
754
 
 
755
/********************************************************************
 
756
********************************************************************/
 
757
 
 
758
bool cli_resolve_path(TALLOC_CTX *ctx,
 
759
                        const char *mountpt,
 
760
                        const struct user_auth_info *dfs_auth_info,
 
761
                        struct cli_state *rootcli,
 
762
                        const char *path,
 
763
                        struct cli_state **targetcli,
 
764
                        char **pp_targetpath)
 
765
{
 
766
        CLIENT_DFS_REFERRAL *refs = NULL;
 
767
        size_t num_refs = 0;
 
768
        size_t consumed = 0;
 
769
        struct cli_state *cli_ipc = NULL;
 
770
        char *dfs_path = NULL;
 
771
        char *cleanpath = NULL;
 
772
        char *extrapath = NULL;
 
773
        int pathlen;
 
774
        char *server = NULL;
 
775
        char *share = NULL;
 
776
        struct cli_state *newcli = NULL;
 
777
        char *newpath = NULL;
 
778
        char *newmount = NULL;
 
779
        char *ppath = NULL;
 
780
        SMB_STRUCT_STAT sbuf;
 
781
        uint32 attributes;
 
782
 
 
783
        if ( !rootcli || !path || !targetcli ) {
 
784
                return false;
 
785
        }
 
786
 
 
787
        /* Don't do anything if this is not a DFS root. */
 
788
 
 
789
        if ( !rootcli->dfsroot) {
 
790
                *targetcli = rootcli;
 
791
                *pp_targetpath = talloc_strdup(ctx, path);
 
792
                if (!*pp_targetpath) {
 
793
                        return false;
 
794
                }
 
795
                return true;
 
796
        }
 
797
 
 
798
        *targetcli = NULL;
 
799
 
 
800
        /* Send a trans2_query_path_info to check for a referral. */
 
801
 
 
802
        cleanpath = clean_path(ctx, path);
 
803
        if (!cleanpath) {
 
804
                return false;
 
805
        }
 
806
 
 
807
        dfs_path = cli_dfs_make_full_path(ctx, rootcli, cleanpath);
 
808
        if (!dfs_path) {
 
809
                return false;
 
810
        }
 
811
 
 
812
        if (cli_qpathinfo_basic( rootcli, dfs_path, &sbuf, &attributes)) {
 
813
                /* This is an ordinary path, just return it. */
 
814
                *targetcli = rootcli;
 
815
                *pp_targetpath = talloc_strdup(ctx, path);
 
816
                if (!*pp_targetpath) {
 
817
                        return false;
 
818
                }
 
819
                goto done;
 
820
        }
 
821
 
 
822
        /* Special case where client asked for a path that does not exist */
 
823
 
 
824
        if (cli_dfs_check_error(rootcli, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 
825
                *targetcli = rootcli;
 
826
                *pp_targetpath = talloc_strdup(ctx, path);
 
827
                if (!*pp_targetpath) {
 
828
                        return false;
 
829
                }
 
830
                goto done;
 
831
        }
 
832
 
 
833
        /* We got an error, check for DFS referral. */
 
834
 
 
835
        if (!cli_dfs_check_error(rootcli, NT_STATUS_PATH_NOT_COVERED)) {
 
836
                return false;
 
837
        }
 
838
 
 
839
        /* Check for the referral. */
 
840
 
 
841
        if (!(cli_ipc = cli_cm_open(ctx,
 
842
                                rootcli,
 
843
                                rootcli->desthost,
 
844
                                "IPC$",
 
845
                                dfs_auth_info,
 
846
                                false,
 
847
                                (rootcli->trans_enc_state != NULL),
 
848
                                rootcli->protocol,
 
849
                                0,
 
850
                                0x20))) {
 
851
                return false;
 
852
        }
 
853
 
 
854
        if (!cli_dfs_get_referral(ctx, cli_ipc, dfs_path, &refs,
 
855
                        &num_refs, &consumed) || !num_refs) {
 
856
                return false;
 
857
        }
 
858
 
 
859
        /* Just store the first referral for now. */
 
860
 
 
861
        if (!refs[0].dfspath) {
 
862
                return false;
 
863
        }
 
864
        split_dfs_path(ctx, refs[0].dfspath, &server, &share, &extrapath );
 
865
 
 
866
        if (!server || !share) {
 
867
                return false;
 
868
        }
 
869
 
 
870
        /* Make sure to recreate the original string including any wildcards. */
 
871
 
 
872
        dfs_path = cli_dfs_make_full_path(ctx, rootcli, path);
 
873
        if (!dfs_path) {
 
874
                return false;
 
875
        }
 
876
        pathlen = strlen(dfs_path);
 
877
        consumed = MIN(pathlen, consumed);
 
878
        *pp_targetpath = talloc_strdup(ctx, &dfs_path[consumed]);
 
879
        if (!*pp_targetpath) {
 
880
                return false;
 
881
        }
 
882
        dfs_path[consumed] = '\0';
 
883
 
 
884
        /*
 
885
         * *pp_targetpath is now the unconsumed part of the path.
 
886
         * dfs_path is now the consumed part of the path
 
887
         * (in \server\share\path format).
 
888
         */
 
889
 
 
890
        /* Open the connection to the target server & share */
 
891
        if ((*targetcli = cli_cm_open(ctx, rootcli,
 
892
                                        server,
 
893
                                        share,
 
894
                                        dfs_auth_info,
 
895
                                        false,
 
896
                                        (rootcli->trans_enc_state != NULL),
 
897
                                        rootcli->protocol,
 
898
                                        0,
 
899
                                        0x20)) == NULL) {
 
900
                d_printf("Unable to follow dfs referral [\\%s\\%s]\n",
 
901
                        server, share );
 
902
                return false;
 
903
        }
 
904
 
 
905
        if (extrapath && strlen(extrapath) > 0) {
 
906
                *pp_targetpath = talloc_asprintf(ctx,
 
907
                                                "%s%s",
 
908
                                                extrapath,
 
909
                                                *pp_targetpath);
 
910
                if (!*pp_targetpath) {
 
911
                        return false;
 
912
                }
 
913
        }
 
914
 
 
915
        /* parse out the consumed mount path */
 
916
        /* trim off the \server\share\ */
 
917
 
 
918
        ppath = dfs_path;
 
919
 
 
920
        if (*ppath != '\\') {
 
921
                d_printf("cli_resolve_path: "
 
922
                        "dfs_path (%s) not in correct format.\n",
 
923
                        dfs_path );
 
924
                return false;
 
925
        }
 
926
 
 
927
        ppath++; /* Now pointing at start of server name. */
 
928
 
 
929
        if ((ppath = strchr_m( dfs_path, '\\' )) == NULL) {
 
930
                return false;
 
931
        }
 
932
 
 
933
        ppath++; /* Now pointing at start of share name. */
 
934
 
 
935
        if ((ppath = strchr_m( ppath+1, '\\' )) == NULL) {
 
936
                return false;
 
937
        }
 
938
 
 
939
        ppath++; /* Now pointing at path component. */
 
940
 
 
941
        newmount = talloc_asprintf(ctx, "%s\\%s", mountpt, ppath );
 
942
        if (!newmount) {
 
943
                return false;
 
944
        }
 
945
 
 
946
        cli_set_mntpoint(*targetcli, newmount);
 
947
 
 
948
        /* Check for another dfs referral, note that we are not
 
949
           checking for loops here. */
 
950
 
 
951
        if (!strequal(*pp_targetpath, "\\") && !strequal(*pp_targetpath, "/")) {
 
952
                if (cli_resolve_path(ctx,
 
953
                                        newmount,
 
954
                                        dfs_auth_info,
 
955
                                        *targetcli,
 
956
                                        *pp_targetpath,
 
957
                                        &newcli,
 
958
                                        &newpath)) {
 
959
                        /*
 
960
                         * When cli_resolve_path returns true here it's always
 
961
                         * returning the complete path in newpath, so we're done
 
962
                         * here.
 
963
                         */
 
964
                        *targetcli = newcli;
 
965
                        *pp_targetpath = newpath;
 
966
                        return true;
 
967
                }
 
968
        }
 
969
 
 
970
  done:
 
971
 
 
972
        /* If returning true ensure we return a dfs root full path. */
 
973
        if ((*targetcli)->dfsroot) {
 
974
                dfs_path = talloc_strdup(ctx, *pp_targetpath);
 
975
                if (!dfs_path) {
 
976
                        return false;
 
977
                }
 
978
                *pp_targetpath = cli_dfs_make_full_path(ctx, *targetcli, dfs_path);
 
979
        }
 
980
 
 
981
        return true;
 
982
}
 
983
 
 
984
/********************************************************************
 
985
********************************************************************/
 
986
 
 
987
static bool cli_check_msdfs_proxy(TALLOC_CTX *ctx,
 
988
                                struct cli_state *cli,
 
989
                                const char *sharename,
 
990
                                char **pp_newserver,
 
991
                                char **pp_newshare,
 
992
                                bool force_encrypt,
 
993
                                const char *username,
 
994
                                const char *password,
 
995
                                const char *domain)
 
996
{
 
997
        CLIENT_DFS_REFERRAL *refs = NULL;
 
998
        size_t num_refs = 0;
 
999
        size_t consumed = 0;
 
1000
        char *fullpath = NULL;
 
1001
        bool res;
 
1002
        uint16 cnum;
 
1003
        char *newextrapath = NULL;
 
1004
 
 
1005
        if (!cli || !sharename) {
 
1006
                return false;
 
1007
        }
 
1008
 
 
1009
        cnum = cli->cnum;
 
1010
 
 
1011
        /* special case.  never check for a referral on the IPC$ share */
 
1012
 
 
1013
        if (strequal(sharename, "IPC$")) {
 
1014
                return false;
 
1015
        }
 
1016
 
 
1017
        /* send a trans2_query_path_info to check for a referral */
 
1018
 
 
1019
        fullpath = talloc_asprintf(ctx, "\\%s\\%s", cli->desthost, sharename );
 
1020
        if (!fullpath) {
 
1021
                return false;
 
1022
        }
 
1023
 
 
1024
        /* check for the referral */
 
1025
 
 
1026
        if (!NT_STATUS_IS_OK(cli_tcon_andx(cli, "IPC$", "IPC", NULL, 0))) {
 
1027
                return false;
 
1028
        }
 
1029
 
 
1030
        if (force_encrypt) {
 
1031
                NTSTATUS status = cli_cm_force_encryption(cli,
 
1032
                                        username,
 
1033
                                        password,
 
1034
                                        lp_workgroup(),
 
1035
                                        "IPC$");
 
1036
                if (!NT_STATUS_IS_OK(status)) {
 
1037
                        return false;
 
1038
                }
 
1039
        }
 
1040
 
 
1041
        res = cli_dfs_get_referral(ctx, cli, fullpath, &refs, &num_refs, &consumed);
 
1042
 
 
1043
        if (!cli_tdis(cli)) {
 
1044
                return false;
 
1045
        }
 
1046
 
 
1047
        cli->cnum = cnum;
 
1048
 
 
1049
        if (!res || !num_refs) {
 
1050
                return false;
 
1051
        }
 
1052
 
 
1053
        if (!refs[0].dfspath) {
 
1054
                return false;
 
1055
        }
 
1056
 
 
1057
        split_dfs_path(ctx, refs[0].dfspath, pp_newserver,
 
1058
                        pp_newshare, &newextrapath );
 
1059
 
 
1060
        if ((*pp_newserver == NULL) || (*pp_newshare == NULL)) {
 
1061
                return false;
 
1062
        }
 
1063
 
 
1064
        /* check that this is not a self-referral */
 
1065
 
 
1066
        if (strequal(cli->desthost, *pp_newserver) &&
 
1067
                        strequal(sharename, *pp_newshare)) {
 
1068
                return false;
 
1069
        }
 
1070
 
 
1071
        return true;
 
1072
}