Line data Source code
1 : /*
2 : Unix SMB/CIFS implementation.
3 :
4 : Copyright Matthieu Patou <mat@matws.net> 2010-2011
5 : Copyright Stefan Metzmacher 2011
6 :
7 : This program is free software; you can redistribute it and/or modify
8 : it under the terms of the GNU General Public License as published by
9 : the Free Software Foundation; either version 3 of the License, or
10 : (at your option) any later version.
11 :
12 : This program is distributed in the hope that it will be useful,
13 : but WITHOUT ANY WARRANTY; without even the implied warranty of
14 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 : GNU General Public License for more details.
16 :
17 : You should have received a copy of the GNU General Public License
18 : along with this program. If not, see <http://www.gnu.org/licenses/>.
19 : */
20 :
21 : #include "includes.h"
22 : #include "librpc/gen_ndr/dfsblobs.h"
23 : #include "librpc/gen_ndr/ndr_dfsblobs.h"
24 : #include "dsdb/samdb/samdb.h"
25 : #include "auth/session.h"
26 : #include "param/param.h"
27 : #include "lib/tsocket/tsocket.h"
28 : #include "dfs_server/dfs_server_ad.h"
29 : #include "lib/util/util_net.h"
30 : #include "libds/common/roles.h"
31 :
32 : #define MAX_DFS_RESPONSE 56*1024 /* 56 Kb */
33 :
34 : #undef strcasecmp
35 :
36 : /* A DC set is a group of DC, they might have been grouped together
37 : because they belong to the same site, or to site with same cost ...
38 : */
39 : struct dc_set {
40 : const char **names;
41 : uint32_t count;
42 : };
43 :
44 8 : static void shuffle_dc_set(struct dc_set *list)
45 : {
46 : uint32_t i;
47 :
48 8 : for (i = list->count; i > 1; i--) {
49 : uint32_t r;
50 : const char *tmp;
51 :
52 0 : r = generate_random() % i;
53 :
54 0 : tmp = list->names[i - 1];
55 0 : list->names[i - 1] = list->names[r];
56 0 : list->names[r] = tmp;
57 : }
58 8 : }
59 :
60 : /*
61 : fill a referral type structure
62 : */
63 2 : static NTSTATUS fill_normal_dfs_referraltype(TALLOC_CTX *mem_ctx,
64 : struct dfs_referral_type *ref,
65 : uint16_t version,
66 : const char *dfs_path,
67 : const char *server_path, int isfirstoffset)
68 : {
69 2 : ZERO_STRUCTP(ref);
70 2 : switch (version) {
71 1 : case 4:
72 1 : ref->version = version;
73 : /* For the moment there is a bug with XP that doesn't
74 : * seem to appreciate much level4 so we return just
75 : * level 3 for everyone
76 : */
77 1 : ref->referral.v4.server_type = DFS_SERVER_NON_ROOT;
78 : /* "normal" referral seems to always include the GUID */
79 1 : ref->referral.v4.size = 34;
80 :
81 1 : if (isfirstoffset) {
82 1 : ref->referral.v4.entry_flags = DFS_HEADER_FLAG_TARGET_BCK;
83 : }
84 1 : ref->referral.v4.ttl = 900; /* As w2k8r2 */
85 1 : ref->referral.v4.referrals.r1.DFS_path = talloc_strdup(mem_ctx, dfs_path);
86 1 : if (ref->referral.v4.referrals.r1.DFS_path == NULL) {
87 0 : return NT_STATUS_NO_MEMORY;
88 : }
89 1 : ref->referral.v4.referrals.r1.DFS_alt_path = talloc_strdup(mem_ctx, dfs_path);
90 1 : if (ref->referral.v4.referrals.r1.DFS_alt_path == NULL) {
91 0 : return NT_STATUS_NO_MEMORY;
92 : }
93 1 : ref->referral.v4.referrals.r1.netw_address = talloc_strdup(mem_ctx, server_path);
94 1 : if (ref->referral.v4.referrals.r1.netw_address == NULL) {
95 0 : return NT_STATUS_NO_MEMORY;
96 : }
97 1 : return NT_STATUS_OK;
98 1 : case 3:
99 1 : ref->version = version;
100 1 : ref->referral.v3.server_type = DFS_SERVER_NON_ROOT;
101 : /* "normal" referral seems to always include the GUID */
102 1 : ref->referral.v3.size = 34;
103 :
104 1 : ref->referral.v3.entry_flags = 0;
105 1 : ref->referral.v3.ttl = 600; /* As w2k3 */
106 1 : ref->referral.v3.referrals.r1.DFS_path = talloc_strdup(mem_ctx, dfs_path);
107 1 : if (ref->referral.v3.referrals.r1.DFS_path == NULL) {
108 0 : return NT_STATUS_NO_MEMORY;
109 : }
110 1 : ref->referral.v3.referrals.r1.DFS_alt_path = talloc_strdup(mem_ctx, dfs_path);
111 1 : if (ref->referral.v3.referrals.r1.DFS_alt_path == NULL) {
112 0 : return NT_STATUS_NO_MEMORY;
113 : }
114 1 : ref->referral.v3.referrals.r1.netw_address = talloc_strdup(mem_ctx, server_path);
115 1 : if (ref->referral.v3.referrals.r1.netw_address == NULL) {
116 0 : return NT_STATUS_NO_MEMORY;
117 : }
118 1 : return NT_STATUS_OK;
119 : }
120 0 : return NT_STATUS_INVALID_LEVEL;
121 : }
122 :
123 : /*
124 : fill a domain refererral
125 : */
126 18 : static NTSTATUS fill_domain_dfs_referraltype(TALLOC_CTX *mem_ctx,
127 : struct dfs_referral_type *ref,
128 : uint16_t version,
129 : const char *domain,
130 : const char **names,
131 : uint16_t numnames)
132 : {
133 18 : switch (version) {
134 18 : case 3:
135 18 : ZERO_STRUCTP(ref);
136 18 : DEBUG(8, ("Called fill_domain_dfs_referraltype\n"));
137 18 : ref->version = version;
138 18 : ref->referral.v3.server_type = DFS_SERVER_NON_ROOT;
139 : #if 0
140 : /* We use to have variable size, on Windows 2008R2 it's the same
141 : * and it seems that it gives better results so ... let's use the same
142 : * size.
143 : *
144 : * Additional note: XP SP2 will ask for version 3 and SP3 for version 4.
145 : */
146 : /*
147 : * It's hard coded ... don't think it's a good way but the
148 : * sizeof return not the correct values
149 : *
150 : * We have 18 if the GUID is not included 34 otherwise
151 : */
152 : if (numnames == 0) {
153 : /* Windows return without the guid when returning domain list
154 : */
155 : ref->referral.v3.size = 18;
156 : } else {
157 : ref->referral.v3.size = 34;
158 : }
159 : #endif
160 : /* As seen in w2k8r2 it always return the null GUID */
161 18 : ref->referral.v3.size = 34;
162 18 : ref->referral.v3.entry_flags = DFS_FLAG_REFERRAL_DOMAIN_RESP;
163 18 : ref->referral.v3.ttl = 600; /* As w2k3 and w2k8r2*/
164 18 : ref->referral.v3.referrals.r2.special_name = talloc_strdup(mem_ctx,
165 : domain);
166 18 : if (ref->referral.v3.referrals.r2.special_name == NULL) {
167 0 : return NT_STATUS_NO_MEMORY;
168 : }
169 18 : ref->referral.v3.referrals.r2.nb_expanded_names = numnames;
170 : /* Put the final terminator */
171 18 : if (names) {
172 : int i;
173 6 : const char **names2 = talloc_array(mem_ctx, const char *,
174 : numnames+1);
175 6 : NT_STATUS_HAVE_NO_MEMORY(names2);
176 12 : for (i = 0; i<numnames; i++) {
177 6 : names2[i] = talloc_asprintf(names2, "\\%s", names[i]);
178 6 : NT_STATUS_HAVE_NO_MEMORY(names2[i]);
179 : }
180 6 : names2[numnames] = NULL;
181 6 : ref->referral.v3.referrals.r2.expanded_names = names2;
182 : }
183 18 : return NT_STATUS_OK;
184 : }
185 0 : return NT_STATUS_INVALID_LEVEL;
186 : }
187 :
188 : /*
189 : get the DCs list within a site
190 : */
191 8 : static NTSTATUS get_dcs_insite(TALLOC_CTX *ctx, struct ldb_context *ldb,
192 : struct ldb_dn *sitedn, struct dc_set *list,
193 : bool dofqdn)
194 : {
195 : static const char *attrs[] = { "serverReference", NULL };
196 : static const char *attrs2[] = { "dNSHostName", "sAMAccountName", NULL };
197 : struct ldb_result *r;
198 : unsigned int i;
199 : int ret;
200 : const char **dc_list;
201 :
202 8 : ret = ldb_search(ldb, ctx, &r, sitedn, LDB_SCOPE_SUBTREE, attrs,
203 : "(&(objectClass=server)(serverReference=*))");
204 8 : if (ret != LDB_SUCCESS) {
205 0 : DEBUG(2,(__location__ ": Failed to get list of servers - %s\n",
206 : ldb_errstring(ldb)));
207 0 : return NT_STATUS_INTERNAL_ERROR;
208 : }
209 :
210 8 : if (r->count == 0) {
211 : /* none in this site */
212 0 : talloc_free(r);
213 0 : return NT_STATUS_OK;
214 : }
215 :
216 : /*
217 : * need to search for all server object to know the size of the array.
218 : * Search all the object of class server in this site
219 : */
220 8 : dc_list = talloc_array(r, const char *, r->count);
221 8 : if (dc_list == NULL) {
222 0 : TALLOC_FREE(r);
223 0 : return NT_STATUS_NO_MEMORY;
224 : }
225 :
226 : /* TODO put some random here in the order */
227 8 : list->names = talloc_realloc(list, list->names, const char *, list->count + r->count);
228 8 : if (list->names == NULL) {
229 0 : TALLOC_FREE(r);
230 0 : return NT_STATUS_NO_MEMORY;
231 : }
232 :
233 16 : for (i = 0; i<r->count; i++) {
234 : struct ldb_dn *dn;
235 : struct ldb_message *msg;
236 :
237 8 : dn = ldb_msg_find_attr_as_dn(ldb, ctx, r->msgs[i], "serverReference");
238 8 : if (!dn) {
239 0 : return NT_STATUS_INTERNAL_ERROR;
240 : }
241 :
242 8 : ret = dsdb_search_one(ldb, r, &msg, dn, LDB_SCOPE_BASE, attrs2, 0, "(objectClass=computer)");
243 8 : if (ret != LDB_SUCCESS) {
244 0 : DEBUG(2,(__location__ ": Search for computer on %s failed - %s\n",
245 : ldb_dn_get_linearized(dn), ldb_errstring(ldb)));
246 0 : return NT_STATUS_INTERNAL_ERROR;
247 : }
248 :
249 8 : if (dofqdn) {
250 5 : const char *dns = ldb_msg_find_attr_as_string(msg, "dNSHostName", NULL);
251 5 : if (dns == NULL) {
252 0 : DEBUG(2,(__location__ ": dNSHostName missing on %s\n",
253 : ldb_dn_get_linearized(dn)));
254 0 : talloc_free(r);
255 0 : return NT_STATUS_INTERNAL_ERROR;
256 : }
257 :
258 5 : list->names[list->count] = talloc_strdup(list->names, dns);
259 5 : if (list->names[list->count] == NULL) {
260 0 : TALLOC_FREE(r);
261 0 : return NT_STATUS_NO_MEMORY;
262 : }
263 : } else {
264 : char *tmp;
265 3 : const char *aname = ldb_msg_find_attr_as_string(msg, "sAMAccountName", NULL);
266 3 : if (aname == NULL) {
267 0 : DEBUG(2,(__location__ ": sAMAccountName missing on %s\n",
268 : ldb_dn_get_linearized(dn)));
269 0 : talloc_free(r);
270 0 : return NT_STATUS_INTERNAL_ERROR;
271 : }
272 :
273 3 : tmp = talloc_strdup(list->names, aname);
274 3 : if (tmp == NULL) {
275 0 : TALLOC_FREE(r);
276 0 : return NT_STATUS_NO_MEMORY;
277 : }
278 :
279 : /* Netbios name is also the sAMAccountName for
280 : computer but without the final $ */
281 3 : tmp[strlen(tmp) - 1] = '\0';
282 3 : list->names[list->count] = tmp;
283 : }
284 8 : list->count++;
285 8 : talloc_free(msg);
286 : }
287 :
288 8 : shuffle_dc_set(list);
289 :
290 8 : talloc_free(r);
291 8 : return NT_STATUS_OK;
292 : }
293 :
294 :
295 : /*
296 : get all DCs
297 : */
298 8 : static NTSTATUS get_dcs(TALLOC_CTX *ctx, struct ldb_context *ldb,
299 : const char *searched_site, bool need_fqdn,
300 : struct dc_set ***pset_list, uint32_t flags)
301 : {
302 : /*
303 : * Flags will be used later to indicate things like least-expensive
304 : * or same-site options
305 : */
306 8 : const char *attrs_none[] = { NULL };
307 8 : const char *attrs3[] = { "name", NULL };
308 : struct ldb_dn *configdn, *sitedn, *dn, *sitescontainerdn;
309 : struct ldb_result *r;
310 8 : struct dc_set **set_list = NULL;
311 : uint32_t i;
312 : int ret;
313 8 : uint32_t current_pos = 0;
314 : NTSTATUS status;
315 : TALLOC_CTX *subctx;
316 :
317 8 : *pset_list = set_list = NULL;
318 :
319 8 : subctx = talloc_new(ctx);
320 8 : NT_STATUS_HAVE_NO_MEMORY(subctx);
321 :
322 8 : configdn = ldb_get_config_basedn(ldb);
323 :
324 : /* Let's search for the Site container */
325 8 : ret = ldb_search(ldb, subctx, &r, configdn, LDB_SCOPE_SUBTREE, attrs_none,
326 : "(objectClass=sitesContainer)");
327 8 : if (ret != LDB_SUCCESS) {
328 0 : DEBUG(2,(__location__ ": Failed to find sitesContainer within %s - %s\n",
329 : ldb_dn_get_linearized(configdn), ldb_errstring(ldb)));
330 0 : talloc_free(subctx);
331 0 : return NT_STATUS_INTERNAL_ERROR;
332 : }
333 8 : if (r->count > 1) {
334 0 : DEBUG(2,(__location__ ": Expected 1 sitesContainer - found %u within %s\n",
335 : r->count, ldb_dn_get_linearized(configdn)));
336 0 : talloc_free(subctx);
337 0 : return NT_STATUS_INTERNAL_ERROR;
338 : }
339 :
340 8 : sitescontainerdn = talloc_steal(subctx, r->msgs[0]->dn);
341 8 : talloc_free(r);
342 :
343 : /*
344 : * TODO: Here we should have a more subtle handling
345 : * for the case "same-site"
346 : */
347 8 : ret = ldb_search(ldb, subctx, &r, sitescontainerdn, LDB_SCOPE_SUBTREE,
348 : attrs_none, "(objectClass=server)");
349 8 : if (ret != LDB_SUCCESS) {
350 0 : DEBUG(2,(__location__ ": Failed to find servers within %s - %s\n",
351 : ldb_dn_get_linearized(sitescontainerdn), ldb_errstring(ldb)));
352 0 : talloc_free(subctx);
353 0 : return NT_STATUS_INTERNAL_ERROR;
354 : }
355 8 : talloc_free(r);
356 :
357 8 : if (searched_site != NULL && searched_site[0] != '\0') {
358 8 : ret = ldb_search(ldb, subctx, &r, configdn, LDB_SCOPE_SUBTREE,
359 : attrs_none, "(&(name=%s)(objectClass=site))", searched_site);
360 8 : if (ret != LDB_SUCCESS) {
361 0 : talloc_free(subctx);
362 0 : return NT_STATUS_FOOBAR;
363 8 : } else if (r->count != 1) {
364 0 : talloc_free(subctx);
365 0 : return NT_STATUS_FOOBAR;
366 : }
367 :
368 : /* All of this was to get the DN of the searched_site */
369 8 : sitedn = r->msgs[0]->dn;
370 :
371 : /*
372 : * We will realloc + 2 because we will need one additional place
373 : * for element at current_pos + 1 for the NULL element
374 : */
375 8 : set_list = talloc_realloc(subctx, set_list, struct dc_set *, current_pos+2);
376 8 : if (set_list == NULL) {
377 0 : TALLOC_FREE(subctx);
378 0 : return NT_STATUS_NO_MEMORY;
379 : }
380 :
381 8 : set_list[current_pos] = talloc(set_list, struct dc_set);
382 8 : if (set_list[current_pos] == NULL) {
383 0 : TALLOC_FREE(subctx);
384 0 : return NT_STATUS_NO_MEMORY;
385 : }
386 :
387 8 : set_list[current_pos]->names = NULL;
388 8 : set_list[current_pos]->count = 0;
389 :
390 8 : set_list[current_pos+1] = NULL;
391 :
392 8 : status = get_dcs_insite(subctx, ldb, sitedn,
393 8 : set_list[current_pos], need_fqdn);
394 8 : if (!NT_STATUS_IS_OK(status)) {
395 0 : DEBUG(2,(__location__ ": Failed to get DC from site %s - %s\n",
396 : ldb_dn_get_linearized(sitedn), nt_errstr(status)));
397 0 : talloc_free(subctx);
398 0 : return status;
399 : }
400 8 : talloc_free(r);
401 8 : current_pos++;
402 : }
403 :
404 : /* Let's find all the sites */
405 8 : ret = ldb_search(ldb, subctx, &r, configdn, LDB_SCOPE_SUBTREE, attrs3, "(objectClass=site)");
406 8 : if (ret != LDB_SUCCESS) {
407 0 : DEBUG(2,(__location__ ": Failed to find any site containers in %s\n",
408 : ldb_dn_get_linearized(configdn)));
409 0 : talloc_free(subctx);
410 0 : return NT_STATUS_INTERNAL_DB_CORRUPTION;
411 : }
412 :
413 : /*
414 : * TODO:
415 : * We should randomize the order in the main site,
416 : * it's mostly needed for sysvol/netlogon referral.
417 : * Depending of flag we either randomize order of the
418 : * not "in the same site DCs"
419 : * or we randomize by group of site that have the same cost
420 : * In the long run we want to manipulate an array of site_set
421 : * All the site in one set have the same cost (if least-expansive options is selected)
422 : * and we will put all the dc related to 1 site set into 1 DCs set.
423 : * Within a site set, site order has to be randomized
424 : *
425 : * But for the moment we just return the list of sites
426 : */
427 8 : if (r->count) {
428 : /*
429 : * We will realloc + 2 because we will need one additional place
430 : * for element at current_pos + 1 for the NULL element
431 : */
432 8 : set_list = talloc_realloc(subctx, set_list, struct dc_set *,
433 : current_pos+2);
434 8 : if (set_list == NULL) {
435 0 : TALLOC_FREE(subctx);
436 0 : return NT_STATUS_NO_MEMORY;
437 : }
438 :
439 8 : set_list[current_pos] = talloc(ctx, struct dc_set);
440 8 : if (set_list[current_pos] == NULL) {
441 0 : TALLOC_FREE(subctx);
442 0 : return NT_STATUS_NO_MEMORY;
443 : }
444 :
445 8 : set_list[current_pos]->names = NULL;
446 8 : set_list[current_pos]->count = 0;
447 :
448 8 : set_list[current_pos+1] = NULL;
449 : }
450 :
451 16 : for (i=0; i<r->count; i++) {
452 8 : const char *site_name = ldb_msg_find_attr_as_string(r->msgs[i], "name", NULL);
453 8 : if (site_name == NULL) {
454 0 : DEBUG(2,(__location__ ": Failed to find name attribute in %s\n",
455 : ldb_dn_get_linearized(r->msgs[i]->dn)));
456 0 : talloc_free(subctx);
457 0 : return NT_STATUS_INTERNAL_DB_CORRUPTION;
458 : }
459 :
460 8 : if (searched_site == NULL ||
461 8 : strcmp(searched_site, site_name) != 0) {
462 0 : DEBUG(2,(__location__ ": Site: %s %s\n",
463 : searched_site, site_name));
464 :
465 : /*
466 : * Do all the site but the one of the client
467 : * (because it has already been done ...)
468 : */
469 0 : dn = r->msgs[i]->dn;
470 :
471 0 : status = get_dcs_insite(subctx, ldb, dn,
472 0 : set_list[current_pos],
473 : need_fqdn);
474 0 : if (!NT_STATUS_IS_OK(status)) {
475 0 : talloc_free(subctx);
476 0 : return status;
477 : }
478 : }
479 : }
480 :
481 8 : *pset_list = talloc_move(ctx, &set_list);
482 8 : talloc_free(subctx);
483 8 : return NT_STATUS_OK;
484 : }
485 :
486 7 : static NTSTATUS dodomain_referral(struct loadparm_context *lp_ctx,
487 : struct ldb_context *sam_ctx,
488 : const struct tsocket_address *client,
489 : struct dfs_GetDFSReferral *r)
490 : {
491 : /*
492 : * TODO for the moment we just return the local domain
493 : */
494 : NTSTATUS status;
495 7 : const char *dns_domain = lpcfg_dnsdomain(lp_ctx);
496 7 : const char *netbios_domain = lpcfg_workgroup(lp_ctx);
497 : struct dfs_referral_type *referrals;
498 : const char *referral_str;
499 : /* In the future this needs to be fetched from the ldb */
500 7 : uint32_t found_domain = 2;
501 :
502 7 : if (lpcfg_server_role(lp_ctx) != ROLE_ACTIVE_DIRECTORY_DC) {
503 0 : DEBUG(10 ,("Received a domain referral request on a non DC\n"));
504 0 : return NT_STATUS_INVALID_PARAMETER;
505 : }
506 :
507 7 : if (r->in.req.max_referral_level < 3) {
508 1 : DEBUG(2,("invalid max_referral_level %u\n",
509 : r->in.req.max_referral_level));
510 1 : return NT_STATUS_UNSUCCESSFUL;
511 : }
512 :
513 6 : r->out.resp = talloc_zero(r, struct dfs_referral_resp);
514 6 : if (r->out.resp == NULL) {
515 0 : return NT_STATUS_NO_MEMORY;
516 : }
517 :
518 6 : r->out.resp->path_consumed = 0;
519 6 : r->out.resp->header_flags = 0; /* Do like w2k3 */
520 6 : r->out.resp->nb_referrals = found_domain; /* the fqdn one + the NT domain */
521 :
522 6 : referrals = talloc_zero_array(r->out.resp,
523 : struct dfs_referral_type,
524 : r->out.resp->nb_referrals);
525 6 : if (referrals == NULL) {
526 0 : return NT_STATUS_NO_MEMORY;
527 : }
528 6 : r->out.resp->referral_entries = referrals;
529 :
530 6 : referral_str = talloc_asprintf(r, "\\%s", netbios_domain);
531 6 : if (referral_str == NULL) {
532 0 : return NT_STATUS_NO_MEMORY;
533 : }
534 :
535 6 : status = fill_domain_dfs_referraltype(referrals,
536 : &referrals[0], 3,
537 : referral_str,
538 : NULL, 0);
539 6 : if (!NT_STATUS_IS_OK(status)) {
540 0 : DEBUG(2,("%s: Unable to fill domain referral structure - %s\n",
541 : __location__, nt_errstr(status)));
542 0 : return status;
543 : }
544 :
545 6 : referral_str = talloc_asprintf(r, "\\%s", dns_domain);
546 6 : if (referral_str == NULL) {
547 0 : return NT_STATUS_NO_MEMORY;
548 : }
549 :
550 6 : status = fill_domain_dfs_referraltype(referrals,
551 : &referrals[1], 3,
552 : referral_str,
553 : NULL, 0);
554 6 : if (!NT_STATUS_IS_OK(status)) {
555 0 : DEBUG(2,("%s: Unable to fill domain referral structure - %s\n",
556 : __location__, nt_errstr(status)));
557 0 : return status;
558 : }
559 :
560 6 : return NT_STATUS_OK;
561 : }
562 :
563 : /*
564 : * Handle the logic for dfs referral request like
565 : * \\dns_domain or \\netbios_domain.
566 : */
567 6 : static NTSTATUS dodc_referral(struct loadparm_context *lp_ctx,
568 : struct ldb_context *sam_ctx,
569 : const struct tsocket_address *client,
570 : struct dfs_GetDFSReferral *r,
571 : const char *domain_name)
572 : {
573 : NTSTATUS status;
574 6 : const char *site_name = NULL; /* Name of the site where the client is */
575 6 : bool need_fqdn = false;
576 : unsigned int i;
577 6 : const char **dc_list = NULL;
578 6 : uint32_t num_dcs = 0;
579 : struct dc_set **set;
580 6 : char *client_str = NULL;
581 : struct dfs_referral_type *referrals;
582 : const char *referral_str;
583 :
584 6 : if (lpcfg_server_role(lp_ctx) != ROLE_ACTIVE_DIRECTORY_DC) {
585 0 : return NT_STATUS_INVALID_PARAMETER;
586 : }
587 :
588 6 : if (r->in.req.max_referral_level < 3) {
589 0 : DEBUG(2,("invalid max_referral_level %u\n",
590 : r->in.req.max_referral_level));
591 0 : return NT_STATUS_UNSUCCESSFUL;
592 : }
593 :
594 6 : DEBUG(10, ("in this we have request for %s requested is %s\n",
595 : domain_name, r->in.req.servername));
596 :
597 6 : if (strchr(domain_name,'.')) {
598 3 : need_fqdn = 1;
599 : }
600 :
601 6 : if (tsocket_address_is_inet(client, "ip")) {
602 6 : client_str = tsocket_address_inet_addr_string(client, r);
603 6 : if (client_str == NULL) {
604 0 : return NT_STATUS_NO_MEMORY;
605 : }
606 : }
607 :
608 6 : site_name = samdb_client_site_name(sam_ctx, r, client_str, NULL, true);
609 :
610 6 : status = get_dcs(r, sam_ctx, site_name, need_fqdn, &set, 0);
611 6 : if (!NT_STATUS_IS_OK(status)) {
612 0 : DEBUG(3,("Unable to get list of DCs - %s\n",
613 : nt_errstr(status)));
614 0 : return status;
615 : }
616 :
617 18 : for(i=0; set[i]; i++) {
618 : uint32_t j;
619 :
620 12 : dc_list = talloc_realloc(r, dc_list, const char*,
621 : num_dcs + set[i]->count + 1);
622 12 : if (dc_list == NULL) {
623 0 : return NT_STATUS_NO_MEMORY;
624 : }
625 :
626 18 : for(j=0; j<set[i]->count; j++) {
627 6 : dc_list[num_dcs + j] = talloc_move(dc_list,
628 : &set[i]->names[j]);
629 : }
630 12 : num_dcs = num_dcs + set[i]->count;
631 12 : TALLOC_FREE(set[i]);
632 12 : dc_list[num_dcs] = NULL;
633 : }
634 :
635 6 : r->out.resp = talloc_zero(r, struct dfs_referral_resp);
636 6 : if (r->out.resp == NULL) {
637 0 : return NT_STATUS_NO_MEMORY;
638 : }
639 :
640 6 : r->out.resp->path_consumed = 0;
641 6 : r->out.resp->header_flags = 0; /* Do like w2k3 */
642 6 : r->out.resp->nb_referrals = 1;
643 :
644 6 : referrals = talloc_zero_array(r->out.resp,
645 : struct dfs_referral_type,
646 : r->out.resp->nb_referrals);
647 6 : if (referrals == NULL) {
648 0 : return NT_STATUS_NO_MEMORY;
649 : }
650 6 : r->out.resp->referral_entries = referrals;
651 :
652 6 : if (r->in.req.servername[0] == '\\') {
653 4 : referral_str = talloc_asprintf(referrals, "%s",
654 : domain_name);
655 : } else {
656 2 : referral_str = talloc_asprintf(referrals, "\\%s",
657 : domain_name);
658 : }
659 6 : if (referral_str == NULL) {
660 0 : return NT_STATUS_NO_MEMORY;
661 : }
662 :
663 6 : status = fill_domain_dfs_referraltype(referrals,
664 : &referrals[0], 3,
665 : referral_str,
666 : dc_list, num_dcs);
667 6 : if (!NT_STATUS_IS_OK(status)) {
668 0 : DEBUG(2,("%s: Unable to fill domain referral structure - %s\n",
669 : __location__, nt_errstr(status)));
670 0 : return status;
671 : }
672 :
673 6 : return NT_STATUS_OK;
674 : }
675 :
676 : /*
677 : * Handle the logic for dfs referral request like
678 : * \\domain\sysvol or \\domain\netlogon
679 : */
680 2 : static NTSTATUS dosysvol_referral(struct loadparm_context *lp_ctx,
681 : struct ldb_context *sam_ctx,
682 : const struct tsocket_address *client,
683 : struct dfs_GetDFSReferral *r,
684 : const char *domain_name,
685 : const char *dfs_name)
686 : {
687 2 : const char *site_name = NULL; /* Name of the site where the client is */
688 2 : bool need_fqdn = false;
689 2 : unsigned int i, c = 0, nb_entries = 0;
690 : struct dc_set **set;
691 2 : char *client_str = NULL;
692 : NTSTATUS status;
693 : struct dfs_referral_type *referrals;
694 :
695 2 : if (lpcfg_server_role(lp_ctx) != ROLE_ACTIVE_DIRECTORY_DC) {
696 0 : return NT_STATUS_INVALID_PARAMETER;
697 : }
698 :
699 2 : if (r->in.req.max_referral_level < 3) {
700 0 : DEBUG(2,("invalid max_referral_level %u\n",
701 : r->in.req.max_referral_level));
702 0 : return NT_STATUS_UNSUCCESSFUL;
703 : }
704 :
705 2 : DEBUG(10, ("in this we have request for %s and share %s requested is %s\n",
706 : domain_name, dfs_name, r->in.req.servername));
707 :
708 2 : if (strchr(domain_name,'.')) {
709 2 : need_fqdn = 1;
710 : }
711 :
712 2 : if (tsocket_address_is_inet(client, "ip")) {
713 2 : client_str = tsocket_address_inet_addr_string(client, r);
714 2 : if (client_str == NULL) {
715 0 : return NT_STATUS_NO_MEMORY;
716 : }
717 : }
718 :
719 2 : site_name = samdb_client_site_name(sam_ctx, r, client_str, NULL, true);
720 :
721 2 : status = get_dcs(r, sam_ctx, site_name, need_fqdn, &set, 0);
722 2 : if (!NT_STATUS_IS_OK(status)) {
723 0 : DEBUG(3,("Unable to get list of DCs - %s\n",
724 : nt_errstr(status)));
725 0 : return status;
726 : }
727 :
728 6 : for(i=0; set[i]; i++) {
729 4 : nb_entries = nb_entries + set[i]->count;
730 : }
731 :
732 2 : r->out.resp = talloc_zero(r, struct dfs_referral_resp);
733 2 : if (r->out.resp == NULL) {
734 0 : return NT_STATUS_NO_MEMORY;
735 : }
736 :
737 : /* The length is expected in bytes */
738 2 : r->out.resp->path_consumed = strlen_m(r->in.req.servername) * 2;
739 : /* Do like w2k3 and like in 3.3.5.3 of MS-DFSC*/
740 2 : r->out.resp->header_flags = DFS_HEADER_FLAG_STORAGE_SVR;
741 2 : r->out.resp->nb_referrals = nb_entries;
742 :
743 2 : referrals = talloc_zero_array(r->out.resp,
744 : struct dfs_referral_type,
745 : r->out.resp->nb_referrals);
746 2 : if (referrals == NULL) {
747 0 : return NT_STATUS_NO_MEMORY;
748 : }
749 2 : r->out.resp->referral_entries = referrals;
750 :
751 2 : c = 0;
752 6 : for(i=0; set[i]; i++) {
753 : uint32_t j;
754 :
755 6 : for(j=0; j< set[i]->count; j++) {
756 2 : struct dfs_referral_type *ref = &referrals[c];
757 : const char *referral_str;
758 :
759 2 : referral_str = talloc_asprintf(referrals, "\\%s\\%s",
760 2 : set[i]->names[j], dfs_name);
761 2 : if (referral_str == NULL) {
762 0 : return NT_STATUS_NO_MEMORY;
763 : }
764 :
765 2 : DEBUG(8,("Doing a dfs referral for %s with this value "
766 : "%s requested %s\n",
767 : set[i]->names[j], referral_str,
768 : r->in.req.servername));
769 :
770 2 : status = fill_normal_dfs_referraltype(referrals, ref,
771 2 : r->in.req.max_referral_level,
772 : r->in.req.servername,
773 : referral_str, c==0);
774 :
775 :
776 2 : if (!NT_STATUS_IS_OK(status)) {
777 0 : DEBUG(2,("%s: Unable to fill domain referral "
778 : "structure - %s\n",
779 : __location__, nt_errstr(status)));
780 0 : return status;
781 : }
782 :
783 2 : c++;
784 : }
785 : }
786 :
787 2 : return NT_STATUS_OK;
788 : }
789 :
790 : /*
791 : trans2 getdfsreferral implementation
792 : */
793 215 : NTSTATUS dfs_server_ad_get_referrals(struct loadparm_context *lp_ctx,
794 : struct ldb_context *sam_ctx,
795 : const struct tsocket_address *client,
796 : struct dfs_GetDFSReferral *r)
797 : {
798 215 : char *server_name = NULL;
799 215 : char *dfs_name = NULL;
800 215 : char *link_path = NULL;
801 : const char *netbios_domain;
802 : const char *dns_domain;
803 : const char *netbios_name;
804 : const char *dns_name;
805 : const char **netbios_aliases;
806 : char path_separator;
807 :
808 215 : if (!lpcfg_host_msdfs(lp_ctx)) {
809 0 : return NT_STATUS_FS_DRIVER_REQUIRED;
810 : }
811 :
812 215 : if (r->in.req.servername == NULL) {
813 0 : return NT_STATUS_INVALID_PARAMETER;
814 : }
815 :
816 215 : DEBUG(8, ("Requested DFS name: %s length: %u\n",
817 : r->in.req.servername,
818 : (unsigned int)strlen_m(r->in.req.servername)*2));
819 :
820 : /*
821 : * If the servername is "" then we are in a case of domain dfs
822 : * and the client just searches for the list of local domain
823 : * it is attached and also trusted ones.
824 : */
825 215 : if (strlen(r->in.req.servername) == 0) {
826 7 : return dodomain_referral(lp_ctx, sam_ctx, client, r);
827 : }
828 :
829 208 : server_name = talloc_strdup(r, r->in.req.servername);
830 208 : if (server_name == NULL) {
831 0 : return NT_STATUS_NO_MEMORY;
832 : }
833 :
834 208 : path_separator = (*server_name == '/') ? '/' : '\\';
835 :
836 412 : while(*server_name && *server_name == path_separator) {
837 204 : server_name++;
838 : }
839 :
840 208 : dfs_name = strchr_m(server_name, path_separator);
841 208 : if (dfs_name != NULL) {
842 201 : dfs_name[0] = '\0';
843 201 : dfs_name++;
844 :
845 201 : link_path = strchr_m(dfs_name, path_separator);
846 201 : if (link_path != NULL) {
847 1 : link_path[0] = '\0';
848 1 : link_path++;
849 : }
850 : }
851 :
852 208 : if (link_path != NULL) {
853 : /*
854 : * If it is a DFS Link we do not
855 : * handle it here.
856 : */
857 1 : return NT_STATUS_NOT_FOUND;
858 : }
859 :
860 207 : netbios_domain = lpcfg_workgroup(lp_ctx);
861 207 : dns_domain = lpcfg_dnsdomain(lp_ctx);
862 207 : netbios_name = lpcfg_netbios_name(lp_ctx);
863 207 : dns_name = talloc_asprintf(r, "%s.%s", netbios_name, dns_domain);
864 207 : if (dns_name == NULL) {
865 0 : return NT_STATUS_NO_MEMORY;
866 : }
867 :
868 319 : if ((strcasecmp_m(server_name, netbios_name) == 0) ||
869 112 : (strcasecmp_m(server_name, dns_name) == 0)) {
870 : /*
871 : * If it is not domain related do not
872 : * handle it here.
873 : */
874 144 : return NT_STATUS_NOT_FOUND;
875 : }
876 :
877 63 : if (is_ipaddress(server_name)) {
878 : /*
879 : * If it is not domain related do not
880 : * handle it here.
881 : */
882 54 : return NT_STATUS_NOT_FOUND;
883 : }
884 :
885 9 : netbios_aliases = lpcfg_netbios_aliases(lp_ctx);
886 18 : while (netbios_aliases && *netbios_aliases) {
887 9 : const char *netbios_alias = *netbios_aliases;
888 : char *dns_alias;
889 : int cmp;
890 :
891 9 : cmp = strcasecmp_m(server_name, netbios_alias);
892 9 : if (cmp == 0) {
893 : /*
894 : * If it is not domain related do not
895 : * handle it here.
896 : */
897 0 : return NT_STATUS_NOT_FOUND;
898 : }
899 :
900 9 : dns_alias = talloc_asprintf(r, "%s.%s",
901 : netbios_alias,
902 : dns_domain);
903 9 : if (dns_alias == NULL) {
904 0 : return NT_STATUS_NO_MEMORY;
905 : }
906 :
907 9 : cmp = strcasecmp_m(server_name, dns_alias);
908 9 : talloc_free(dns_alias);
909 9 : if (cmp == 0) {
910 : /*
911 : * If it is not domain related do not
912 : * handle it here.
913 : */
914 0 : return NT_STATUS_NOT_FOUND;
915 : }
916 9 : netbios_aliases++;
917 : }
918 :
919 15 : if ((strcasecmp_m(server_name, netbios_domain) != 0) &&
920 6 : (strcasecmp_m(server_name, dns_domain) != 0)) {
921 : /*
922 : * Not a domain we handle.
923 : */
924 1 : return NT_STATUS_INVALID_PARAMETER;
925 : }
926 :
927 : /*
928 : * Here we have filtered the thing the requested name don't contain our DNS name.
929 : * So if the share == NULL or if share in ("sysvol", "netlogon")
930 : * then we proceed. In the first case it will be a dc refereal in the second it will
931 : * be just a sysvol/netlogon referral.
932 : */
933 8 : if (dfs_name == NULL) {
934 6 : return dodc_referral(lp_ctx, sam_ctx,
935 : client, r, server_name);
936 : }
937 :
938 : /*
939 : * Here we have filtered the thing the requested name don't contain our DNS name.
940 : * So if the share == NULL or if share in ("sysvol", "netlogon")
941 : * then we proceed. In the first case it will be a dc refereal in the second it will
942 : * be just a sysvol/netlogon referral.
943 : */
944 2 : if (strcasecmp(dfs_name, "sysvol") == 0 ||
945 0 : strcasecmp(dfs_name, "netlogon") == 0) {
946 2 : return dosysvol_referral(lp_ctx, sam_ctx, client, r,
947 : server_name, dfs_name);
948 : }
949 :
950 : /* By default until all the case are handled */
951 0 : return NT_STATUS_NOT_FOUND;
952 : }
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