?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
s3:libsmb: make use of get_cmdline_auth_info_* helper functions in get_ipc_connect()
[Samba.git] / source3 / libsmb / namequery.c
blob945fc644bb2e4982d759edbe31b1270088d49686
1 /*
2 Unix SMB/CIFS implementation.
3 name query routines
4 Copyright (C) Andrew Tridgell 1994-1998
5 Copyright (C) Jeremy Allison 2007.
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 "../lib/util/tevent_ntstatus.h"
23 #include "libads/sitename_cache.h"
24 #include "../lib/addns/dnsquery.h"
25 #include "../libcli/netlogon/netlogon.h"
26 #include "lib/async_req/async_sock.h"
27 #include "lib/tsocket/tsocket.h"
28 #include "libsmb/nmblib.h"
29 #include "../libcli/nbt/libnbt.h"
30 #include "libads/kerberos_proto.h"
31
32 /* nmbd.c sets this to True. */
33 bool global_in_nmbd = False;
34
35 /****************************
36 * SERVER AFFINITY ROUTINES *
37 ****************************/
38
39 /* Server affinity is the concept of preferring the last domain
40 controller with whom you had a successful conversation */
41
42 /****************************************************************************
43 ****************************************************************************/
44 #define SAFKEY_FMT "SAF/DOMAIN/%s"
45 #define SAF_TTL 900
46 #define SAFJOINKEY_FMT "SAFJOIN/DOMAIN/%s"
47 #define SAFJOIN_TTL 3600
48
49 static char *saf_key(TALLOC_CTX *mem_ctx, const char *domain)
50 {
51 return talloc_asprintf_strupper_m(mem_ctx, SAFKEY_FMT, domain);
52 }
53
54 static char *saf_join_key(TALLOC_CTX *mem_ctx, const char *domain)
55 {
56 return talloc_asprintf_strupper_m(mem_ctx, SAFJOINKEY_FMT, domain);
57 }
58
59 /****************************************************************************
60 ****************************************************************************/
61
62 bool saf_store( const char *domain, const char *servername )
63 {
64 char *key;
65 time_t expire;
66 bool ret = False;
67
68 if ( !domain || !servername ) {
69 DEBUG(2,("saf_store: "
70 "Refusing to store empty domain or servername!\n"));
71 return False;
72 }
73
74 if ( (strlen(domain) == 0) || (strlen(servername) == 0) ) {
75 DEBUG(0,("saf_store: "
76 "refusing to store 0 length domain or servername!\n"));
77 return False;
78 }
79
80 key = saf_key(talloc_tos(), domain);
81 if (key == NULL) {
82 DEBUG(1, ("saf_key() failed\n"));
83 return false;
84 }
85 expire = time( NULL ) + lp_parm_int(-1, "saf","ttl", SAF_TTL);
86
87 DEBUG(10,("saf_store: domain = [%s], server = [%s], expire = [%u]\n",
88 domain, servername, (unsigned int)expire ));
89
90 ret = gencache_set( key, servername, expire );
91
92 TALLOC_FREE( key );
93
94 return ret;
95 }
96
97 bool saf_join_store( const char *domain, const char *servername )
98 {
99 char *key;
100 time_t expire;
101 bool ret = False;
102
103 if ( !domain || !servername ) {
104 DEBUG(2,("saf_join_store: Refusing to store empty domain or servername!\n"));
105 return False;
106 }
107
108 if ( (strlen(domain) == 0) || (strlen(servername) == 0) ) {
109 DEBUG(0,("saf_join_store: refusing to store 0 length domain or servername!\n"));
110 return False;
111 }
112
113 key = saf_join_key(talloc_tos(), domain);
114 if (key == NULL) {
115 DEBUG(1, ("saf_join_key() failed\n"));
116 return false;
117 }
118 expire = time( NULL ) + lp_parm_int(-1, "saf","join ttl", SAFJOIN_TTL);
119
120 DEBUG(10,("saf_join_store: domain = [%s], server = [%s], expire = [%u]\n",
121 domain, servername, (unsigned int)expire ));
122
123 ret = gencache_set( key, servername, expire );
124
125 TALLOC_FREE( key );
126
127 return ret;
128 }
129
130 bool saf_delete( const char *domain )
131 {
132 char *key;
133 bool ret = False;
134
135 if ( !domain ) {
136 DEBUG(2,("saf_delete: Refusing to delete empty domain\n"));
137 return False;
138 }
139
140 key = saf_join_key(talloc_tos(), domain);
141 if (key == NULL) {
142 DEBUG(1, ("saf_join_key() failed\n"));
143 return false;
144 }
145 ret = gencache_del(key);
146 TALLOC_FREE(key);
147
148 if (ret) {
149 DEBUG(10,("saf_delete[join]: domain = [%s]\n", domain ));
150 }
151
152 key = saf_key(talloc_tos(), domain);
153 if (key == NULL) {
154 DEBUG(1, ("saf_key() failed\n"));
155 return false;
156 }
157 ret = gencache_del(key);
158 TALLOC_FREE(key);
159
160 if (ret) {
161 DEBUG(10,("saf_delete: domain = [%s]\n", domain ));
162 }
163
164 return ret;
165 }
166
167 /****************************************************************************
168 ****************************************************************************/
169
170 char *saf_fetch(TALLOC_CTX *mem_ctx, const char *domain )
171 {
172 char *server = NULL;
173 time_t timeout;
174 bool ret = False;
175 char *key = NULL;
176
177 if ( !domain || strlen(domain) == 0) {
178 DEBUG(2,("saf_fetch: Empty domain name!\n"));
179 return NULL;
180 }
181
182 key = saf_join_key(talloc_tos(), domain);
183 if (key == NULL) {
184 DEBUG(1, ("saf_join_key() failed\n"));
185 return NULL;
186 }
187
188 ret = gencache_get( key, mem_ctx, &server, &timeout );
189
190 TALLOC_FREE( key );
191
192 if ( ret ) {
193 DEBUG(5,("saf_fetch[join]: Returning \"%s\" for \"%s\" domain\n",
194 server, domain ));
195 return server;
196 }
197
198 key = saf_key(talloc_tos(), domain);
199 if (key == NULL) {
200 DEBUG(1, ("saf_key() failed\n"));
201 return NULL;
202 }
203
204 ret = gencache_get( key, mem_ctx, &server, &timeout );
205
206 TALLOC_FREE( key );
207
208 if ( !ret ) {
209 DEBUG(5,("saf_fetch: failed to find server for \"%s\" domain\n",
210 domain ));
211 } else {
212 DEBUG(5,("saf_fetch: Returning \"%s\" for \"%s\" domain\n",
213 server, domain ));
214 }
215
216 return server;
217 }
218
219 static void set_socket_addr_v4(struct sockaddr_storage *addr)
220 {
221 if (!interpret_string_addr(addr, lp_nbt_client_socket_address(),
222 AI_NUMERICHOST|AI_PASSIVE)) {
223 zero_sockaddr(addr);
224 }
225 if (addr->ss_family != AF_INET) {
226 zero_sockaddr(addr);
227 }
228 }
229
230 static struct in_addr my_socket_addr_v4(void)
231 {
232 struct sockaddr_storage my_addr;
233 struct sockaddr_in *in_addr = (struct sockaddr_in *)((char *)&my_addr);
234
235 set_socket_addr_v4(&my_addr);
236 return in_addr->sin_addr;
237 }
238
239 /****************************************************************************
240 Generate a random trn_id.
241 ****************************************************************************/
242
243 static int generate_trn_id(void)
244 {
245 uint16_t id;
246
247 generate_random_buffer((uint8_t *)&id, sizeof(id));
248
249 return id % (unsigned)0x7FFF;
250 }
251
252 /****************************************************************************
253 Parse a node status response into an array of structures.
254 ****************************************************************************/
255
256 static struct node_status *parse_node_status(TALLOC_CTX *mem_ctx, char *p,
257 int *num_names,
258 struct node_status_extra *extra)
259 {
260 struct node_status *ret;
261 int i;
262
263 *num_names = CVAL(p,0);
264
265 if (*num_names == 0)
266 return NULL;
267
268 ret = talloc_array(mem_ctx, struct node_status,*num_names);
269 if (!ret)
270 return NULL;
271
272 p++;
273 for (i=0;i< *num_names;i++) {
274 StrnCpy(ret[i].name,p,15);
275 trim_char(ret[i].name,'\0',' ');
276 ret[i].type = CVAL(p,15);
277 ret[i].flags = p[16];
278 p += 18;
279 DEBUG(10, ("%s#%02x: flags = 0x%02x\n", ret[i].name,
280 ret[i].type, ret[i].flags));
281 }
282 /*
283 * Also, pick up the MAC address ...
284 */
285 if (extra) {
286 memcpy(&extra->mac_addr, p, 6); /* Fill in the mac addr */
287 }
288 return ret;
289 }
290
291 struct sock_packet_read_state {
292 struct tevent_context *ev;
293 enum packet_type type;
294 int trn_id;
295
296 struct nb_packet_reader *reader;
297 struct tevent_req *reader_req;
298
299 struct tdgram_context *sock;
300 struct tevent_req *socket_req;
301 uint8_t *buf;
302 struct tsocket_address *addr;
303
304 bool (*validator)(struct packet_struct *p,
305 void *private_data);
306 void *private_data;
307
308 struct packet_struct *packet;
309 };
310
311 static int sock_packet_read_state_destructor(struct sock_packet_read_state *s);
312 static void sock_packet_read_got_packet(struct tevent_req *subreq);
313 static void sock_packet_read_got_socket(struct tevent_req *subreq);
314
315 static struct tevent_req *sock_packet_read_send(
316 TALLOC_CTX *mem_ctx,
317 struct tevent_context *ev,
318 struct tdgram_context *sock,
319 struct nb_packet_reader *reader,
320 enum packet_type type,
321 int trn_id,
322 bool (*validator)(struct packet_struct *p, void *private_data),
323 void *private_data)
324 {
325 struct tevent_req *req;
326 struct sock_packet_read_state *state;
327
328 req = tevent_req_create(mem_ctx, &state,
329 struct sock_packet_read_state);
330 if (req == NULL) {
331 return NULL;
332 }
333 talloc_set_destructor(state, sock_packet_read_state_destructor);
334 state->ev = ev;
335 state->reader = reader;
336 state->sock = sock;
337 state->type = type;
338 state->trn_id = trn_id;
339 state->validator = validator;
340 state->private_data = private_data;
341
342 if (reader != NULL) {
343 state->reader_req = nb_packet_read_send(state, ev, reader);
344 if (tevent_req_nomem(state->reader_req, req)) {
345 return tevent_req_post(req, ev);
346 }
347 tevent_req_set_callback(
348 state->reader_req, sock_packet_read_got_packet, req);
349 }
350
351 state->socket_req = tdgram_recvfrom_send(state, ev, state->sock);
352 if (tevent_req_nomem(state->socket_req, req)) {
353 return tevent_req_post(req, ev);
354 }
355 tevent_req_set_callback(state->socket_req, sock_packet_read_got_socket,
356 req);
357
358 return req;
359 }
360
361 static int sock_packet_read_state_destructor(struct sock_packet_read_state *s)
362 {
363 if (s->packet != NULL) {
364 free_packet(s->packet);
365 s->packet = NULL;
366 }
367 return 0;
368 }
369
370 static void sock_packet_read_got_packet(struct tevent_req *subreq)
371 {
372 struct tevent_req *req = tevent_req_callback_data(
373 subreq, struct tevent_req);
374 struct sock_packet_read_state *state = tevent_req_data(
375 req, struct sock_packet_read_state);
376 NTSTATUS status;
377
378 status = nb_packet_read_recv(subreq, &state->packet);
379
380 TALLOC_FREE(state->reader_req);
381
382 if (!NT_STATUS_IS_OK(status)) {
383 if (state->socket_req != NULL) {
384 /*
385 * Still waiting for socket
386 */
387 return;
388 }
389 /*
390 * Both socket and packet reader failed
391 */
392 tevent_req_nterror(req, status);
393 return;
394 }
395
396 if ((state->validator != NULL) &&
397 !state->validator(state->packet, state->private_data)) {
398 DEBUG(10, ("validator failed\n"));
399
400 free_packet(state->packet);
401 state->packet = NULL;
402
403 state->reader_req = nb_packet_read_send(state, state->ev,
404 state->reader);
405 if (tevent_req_nomem(state->reader_req, req)) {
406 return;
407 }
408 tevent_req_set_callback(
409 state->reader_req, sock_packet_read_got_packet, req);
410 return;
411 }
412
413 TALLOC_FREE(state->socket_req);
414 tevent_req_done(req);
415 }
416
417 static void sock_packet_read_got_socket(struct tevent_req *subreq)
418 {
419 struct tevent_req *req = tevent_req_callback_data(
420 subreq, struct tevent_req);
421 struct sock_packet_read_state *state = tevent_req_data(
422 req, struct sock_packet_read_state);
423 union {
424 struct sockaddr sa;
425 struct sockaddr_in sin;
426 } addr;
427 ssize_t ret;
428 ssize_t received;
429 int err;
430 bool ok;
431
432 received = tdgram_recvfrom_recv(subreq, &err, state,
433 &state->buf, &state->addr);
434
435 TALLOC_FREE(state->socket_req);
436
437 if (received == -1) {
438 if (state->reader_req != NULL) {
439 /*
440 * Still waiting for reader
441 */
442 return;
443 }
444 /*
445 * Both socket and reader failed
446 */
447 tevent_req_nterror(req, map_nt_error_from_unix(err));
448 return;
449 }
450 ok = tsocket_address_is_inet(state->addr, "ipv4");
451 if (!ok) {
452 goto retry;
453 }
454 ret = tsocket_address_bsd_sockaddr(state->addr,
455 &addr.sa,
456 sizeof(addr.sin));
457 if (ret == -1) {
458 tevent_req_nterror(req, map_nt_error_from_unix(errno));
459 return;
460 }
461
462 state->packet = parse_packet((char *)state->buf, received, state->type,
463 addr.sin.sin_addr, addr.sin.sin_port);
464 if (state->packet == NULL) {
465 DEBUG(10, ("parse_packet failed\n"));
466 goto retry;
467 }
468 if ((state->trn_id != -1) &&
469 (state->trn_id != packet_trn_id(state->packet))) {
470 DEBUG(10, ("Expected transaction id %d, got %d\n",
471 state->trn_id, packet_trn_id(state->packet)));
472 goto retry;
473 }
474
475 if ((state->validator != NULL) &&
476 !state->validator(state->packet, state->private_data)) {
477 DEBUG(10, ("validator failed\n"));
478 goto retry;
479 }
480
481 tevent_req_done(req);
482 return;
483
484 retry:
485 if (state->packet != NULL) {
486 free_packet(state->packet);
487 state->packet = NULL;
488 }
489 TALLOC_FREE(state->buf);
490 TALLOC_FREE(state->addr);
491
492 state->socket_req = tdgram_recvfrom_send(state, state->ev, state->sock);
493 if (tevent_req_nomem(state->socket_req, req)) {
494 return;
495 }
496 tevent_req_set_callback(state->socket_req, sock_packet_read_got_socket,
497 req);
498 }
499
500 static NTSTATUS sock_packet_read_recv(struct tevent_req *req,
501 struct packet_struct **ppacket)
502 {
503 struct sock_packet_read_state *state = tevent_req_data(
504 req, struct sock_packet_read_state);
505 NTSTATUS status;
506
507 if (tevent_req_is_nterror(req, &status)) {
508 return status;
509 }
510 *ppacket = state->packet;
511 state->packet = NULL;
512 return NT_STATUS_OK;
513 }
514
515 struct nb_trans_state {
516 struct tevent_context *ev;
517 struct tdgram_context *sock;
518 struct nb_packet_reader *reader;
519
520 struct tsocket_address *src_addr;
521 struct tsocket_address *dst_addr;
522 uint8_t *buf;
523 size_t buflen;
524 enum packet_type type;
525 int trn_id;
526
527 bool (*validator)(struct packet_struct *p,
528 void *private_data);
529 void *private_data;
530
531 struct packet_struct *packet;
532 };
533
534 static int nb_trans_state_destructor(struct nb_trans_state *s);
535 static void nb_trans_got_reader(struct tevent_req *subreq);
536 static void nb_trans_done(struct tevent_req *subreq);
537 static void nb_trans_sent(struct tevent_req *subreq);
538 static void nb_trans_send_next(struct tevent_req *subreq);
539
540 static struct tevent_req *nb_trans_send(
541 TALLOC_CTX *mem_ctx,
542 struct tevent_context *ev,
543 const struct sockaddr_storage *_my_addr,
544 const struct sockaddr_storage *_dst_addr,
545 bool bcast,
546 uint8_t *buf, size_t buflen,
547 enum packet_type type, int trn_id,
548 bool (*validator)(struct packet_struct *p,
549 void *private_data),
550 void *private_data)
551 {
552 const struct sockaddr *my_addr =
553 discard_const_p(const struct sockaddr, _my_addr);
554 size_t my_addr_len = sizeof(*_my_addr);
555 const struct sockaddr *dst_addr =
556 discard_const_p(const struct sockaddr, _dst_addr);
557 size_t dst_addr_len = sizeof(*_dst_addr);
558 struct tevent_req *req, *subreq;
559 struct nb_trans_state *state;
560 int ret;
561
562 req = tevent_req_create(mem_ctx, &state, struct nb_trans_state);
563 if (req == NULL) {
564 return NULL;
565 }
566 talloc_set_destructor(state, nb_trans_state_destructor);
567 state->ev = ev;
568 state->buf = buf;
569 state->buflen = buflen;
570 state->type = type;
571 state->trn_id = trn_id;
572 state->validator = validator;
573 state->private_data = private_data;
574
575 ret = tsocket_address_bsd_from_sockaddr(state,
576 my_addr, my_addr_len,
577 &state->src_addr);
578 if (ret == -1) {
579 tevent_req_nterror(req, map_nt_error_from_unix(errno));
580 return tevent_req_post(req, ev);
581 }
582
583 ret = tsocket_address_bsd_from_sockaddr(state,
584 dst_addr, dst_addr_len,
585 &state->dst_addr);
586 if (ret == -1) {
587 tevent_req_nterror(req, map_nt_error_from_unix(errno));
588 return tevent_req_post(req, ev);
589 }
590
591 ret = tdgram_inet_udp_broadcast_socket(state->src_addr, state,
592 &state->sock);
593 if (ret == -1) {
594 tevent_req_nterror(req, map_nt_error_from_unix(errno));
595 return tevent_req_post(req, ev);
596 }
597
598 subreq = nb_packet_reader_send(state, ev, type, state->trn_id, NULL);
599 if (tevent_req_nomem(subreq, req)) {
600 return tevent_req_post(req, ev);
601 }
602 tevent_req_set_callback(subreq, nb_trans_got_reader, req);
603 return req;
604 }
605
606 static int nb_trans_state_destructor(struct nb_trans_state *s)
607 {
608 if (s->packet != NULL) {
609 free_packet(s->packet);
610 s->packet = NULL;
611 }
612 return 0;
613 }
614
615 static void nb_trans_got_reader(struct tevent_req *subreq)
616 {
617 struct tevent_req *req = tevent_req_callback_data(
618 subreq, struct tevent_req);
619 struct nb_trans_state *state = tevent_req_data(
620 req, struct nb_trans_state);
621 NTSTATUS status;
622
623 status = nb_packet_reader_recv(subreq, state, &state->reader);
624 TALLOC_FREE(subreq);
625
626 if (!NT_STATUS_IS_OK(status)) {
627 DEBUG(10, ("nmbd not around\n"));
628 state->reader = NULL;
629 }
630
631 subreq = sock_packet_read_send(
632 state, state->ev, state->sock,
633 state->reader, state->type, state->trn_id,
634 state->validator, state->private_data);
635 if (tevent_req_nomem(subreq, req)) {
636 return;
637 }
638 tevent_req_set_callback(subreq, nb_trans_done, req);
639
640 subreq = tdgram_sendto_send(state, state->ev,
641 state->sock,
642 state->buf, state->buflen,
643 state->dst_addr);
644 if (tevent_req_nomem(subreq, req)) {
645 return;
646 }
647 tevent_req_set_callback(subreq, nb_trans_sent, req);
648 }
649
650 static void nb_trans_sent(struct tevent_req *subreq)
651 {
652 struct tevent_req *req = tevent_req_callback_data(
653 subreq, struct tevent_req);
654 struct nb_trans_state *state = tevent_req_data(
655 req, struct nb_trans_state);
656 ssize_t sent;
657 int err;
658
659 sent = tdgram_sendto_recv(subreq, &err);
660 TALLOC_FREE(subreq);
661 if (sent == -1) {
662 DEBUG(10, ("sendto failed: %s\n", strerror(err)));
663 tevent_req_nterror(req, map_nt_error_from_unix(err));
664 return;
665 }
666 subreq = tevent_wakeup_send(state, state->ev,
667 timeval_current_ofs(1, 0));
668 if (tevent_req_nomem(subreq, req)) {
669 return;
670 }
671 tevent_req_set_callback(subreq, nb_trans_send_next, req);
672 }
673
674 static void nb_trans_send_next(struct tevent_req *subreq)
675 {
676 struct tevent_req *req = tevent_req_callback_data(
677 subreq, struct tevent_req);
678 struct nb_trans_state *state = tevent_req_data(
679 req, struct nb_trans_state);
680 bool ret;
681
682 ret = tevent_wakeup_recv(subreq);
683 TALLOC_FREE(subreq);
684 if (!ret) {
685 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
686 return;
687 }
688 subreq = tdgram_sendto_send(state, state->ev,
689 state->sock,
690 state->buf, state->buflen,
691 state->dst_addr);
692 if (tevent_req_nomem(subreq, req)) {
693 return;
694 }
695 tevent_req_set_callback(subreq, nb_trans_sent, req);
696 }
697
698 static void nb_trans_done(struct tevent_req *subreq)
699 {
700 struct tevent_req *req = tevent_req_callback_data(
701 subreq, struct tevent_req);
702 struct nb_trans_state *state = tevent_req_data(
703 req, struct nb_trans_state);
704 NTSTATUS status;
705
706 status = sock_packet_read_recv(subreq, &state->packet);
707 TALLOC_FREE(subreq);
708 if (tevent_req_nterror(req, status)) {
709 return;
710 }
711 tevent_req_done(req);
712 }
713
714 static NTSTATUS nb_trans_recv(struct tevent_req *req,
715 struct packet_struct **ppacket)
716 {
717 struct nb_trans_state *state = tevent_req_data(
718 req, struct nb_trans_state);
719 NTSTATUS status;
720
721 if (tevent_req_is_nterror(req, &status)) {
722 return status;
723 }
724 *ppacket = state->packet;
725 state->packet = NULL;
726 return NT_STATUS_OK;
727 }
728
729 /****************************************************************************
730 Do a NBT node status query on an open socket and return an array of
731 structures holding the returned names or NULL if the query failed.
732 **************************************************************************/
733
734 struct node_status_query_state {
735 struct sockaddr_storage my_addr;
736 struct sockaddr_storage addr;
737 uint8_t buf[1024];
738 ssize_t buflen;
739 struct packet_struct *packet;
740 };
741
742 static int node_status_query_state_destructor(
743 struct node_status_query_state *s);
744 static bool node_status_query_validator(struct packet_struct *p,
745 void *private_data);
746 static void node_status_query_done(struct tevent_req *subreq);
747
748 struct tevent_req *node_status_query_send(TALLOC_CTX *mem_ctx,
749 struct tevent_context *ev,
750 struct nmb_name *name,
751 const struct sockaddr_storage *addr)
752 {
753 struct tevent_req *req, *subreq;
754 struct node_status_query_state *state;
755 struct packet_struct p;
756 struct nmb_packet *nmb = &p.packet.nmb;
757 struct sockaddr_in *in_addr;
758
759 req = tevent_req_create(mem_ctx, &state,
760 struct node_status_query_state);
761 if (req == NULL) {
762 return NULL;
763 }
764 talloc_set_destructor(state, node_status_query_state_destructor);
765
766 if (addr->ss_family != AF_INET) {
767 /* Can't do node status to IPv6 */
768 tevent_req_nterror(req, NT_STATUS_INVALID_ADDRESS);
769 return tevent_req_post(req, ev);
770 }
771
772 state->addr = *addr;
773 in_addr = (struct sockaddr_in *)(void *)&state->addr;
774 in_addr->sin_port = htons(NMB_PORT);
775
776 set_socket_addr_v4(&state->my_addr);
777
778 ZERO_STRUCT(p);
779 nmb->header.name_trn_id = generate_trn_id();
780 nmb->header.opcode = 0;
781 nmb->header.response = false;
782 nmb->header.nm_flags.bcast = false;
783 nmb->header.nm_flags.recursion_available = false;
784 nmb->header.nm_flags.recursion_desired = false;
785 nmb->header.nm_flags.trunc = false;
786 nmb->header.nm_flags.authoritative = false;
787 nmb->header.rcode = 0;
788 nmb->header.qdcount = 1;
789 nmb->header.ancount = 0;
790 nmb->header.nscount = 0;
791 nmb->header.arcount = 0;
792 nmb->question.question_name = *name;
793 nmb->question.question_type = 0x21;
794 nmb->question.question_class = 0x1;
795
796 state->buflen = build_packet((char *)state->buf, sizeof(state->buf),
797 &p);
798 if (state->buflen == 0) {
799 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
800 DEBUG(10, ("build_packet failed\n"));
801 return tevent_req_post(req, ev);
802 }
803
804 subreq = nb_trans_send(state, ev, &state->my_addr, &state->addr, false,
805 state->buf, state->buflen,
806 NMB_PACKET, nmb->header.name_trn_id,
807 node_status_query_validator, NULL);
808 if (tevent_req_nomem(subreq, req)) {
809 DEBUG(10, ("nb_trans_send failed\n"));
810 return tevent_req_post(req, ev);
811 }
812 if (!tevent_req_set_endtime(req, ev, timeval_current_ofs(10, 0))) {
813 return tevent_req_post(req, ev);
814 }
815 tevent_req_set_callback(subreq, node_status_query_done, req);
816 return req;
817 }
818
819 static bool node_status_query_validator(struct packet_struct *p,
820 void *private_data)
821 {
822 struct nmb_packet *nmb = &p->packet.nmb;
823 debug_nmb_packet(p);
824
825 if (nmb->header.opcode != 0 ||
826 nmb->header.nm_flags.bcast ||
827 nmb->header.rcode ||
828 !nmb->header.ancount ||
829 nmb->answers->rr_type != 0x21) {
830 /*
831 * XXXX what do we do with this? could be a redirect,
832 * but we'll discard it for the moment
833 */
834 return false;
835 }
836 return true;
837 }
838
839 static int node_status_query_state_destructor(
840 struct node_status_query_state *s)
841 {
842 if (s->packet != NULL) {
843 free_packet(s->packet);
844 s->packet = NULL;
845 }
846 return 0;
847 }
848
849 static void node_status_query_done(struct tevent_req *subreq)
850 {
851 struct tevent_req *req = tevent_req_callback_data(
852 subreq, struct tevent_req);
853 struct node_status_query_state *state = tevent_req_data(
854 req, struct node_status_query_state);
855 NTSTATUS status;
856
857 status = nb_trans_recv(subreq, &state->packet);
858 TALLOC_FREE(subreq);
859 if (tevent_req_nterror(req, status)) {
860 return;
861 }
862 tevent_req_done(req);
863 }
864
865 NTSTATUS node_status_query_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
866 struct node_status **pnode_status,
867 int *pnum_names,
868 struct node_status_extra *extra)
869 {
870 struct node_status_query_state *state = tevent_req_data(
871 req, struct node_status_query_state);
872 struct node_status *node_status;
873 int num_names;
874 NTSTATUS status;
875
876 if (tevent_req_is_nterror(req, &status)) {
877 return status;
878 }
879 node_status = parse_node_status(
880 mem_ctx, &state->packet->packet.nmb.answers->rdata[0],
881 &num_names, extra);
882 if (node_status == NULL) {
883 return NT_STATUS_NO_MEMORY;
884 }
885 *pnode_status = node_status;
886 *pnum_names = num_names;
887 return NT_STATUS_OK;
888 }
889
890 NTSTATUS node_status_query(TALLOC_CTX *mem_ctx, struct nmb_name *name,
891 const struct sockaddr_storage *addr,
892 struct node_status **pnode_status,
893 int *pnum_names,
894 struct node_status_extra *extra)
895 {
896 TALLOC_CTX *frame = talloc_stackframe();
897 struct tevent_context *ev;
898 struct tevent_req *req;
899 NTSTATUS status = NT_STATUS_NO_MEMORY;
900
901 ev = samba_tevent_context_init(frame);
902 if (ev == NULL) {
903 goto fail;
904 }
905 req = node_status_query_send(ev, ev, name, addr);
906 if (req == NULL) {
907 goto fail;
908 }
909 if (!tevent_req_poll_ntstatus(req, ev, &status)) {
910 goto fail;
911 }
912 status = node_status_query_recv(req, mem_ctx, pnode_status,
913 pnum_names, extra);
914 fail:
915 TALLOC_FREE(frame);
916 return status;
917 }
918
919 /****************************************************************************
920 Find the first type XX name in a node status reply - used for finding
921 a servers name given its IP. Return the matched name in *name.
922 **************************************************************************/
923
924 bool name_status_find(const char *q_name,
925 int q_type,
926 int type,
927 const struct sockaddr_storage *to_ss,
928 fstring name)
929 {
930 char addr[INET6_ADDRSTRLEN];
931 struct sockaddr_storage ss;
932 struct node_status *addrs = NULL;
933 struct nmb_name nname;
934 int count, i;
935 bool result = false;
936 NTSTATUS status;
937
938 if (lp_disable_netbios()) {
939 DEBUG(5,("name_status_find(%s#%02x): netbios is disabled\n",
940 q_name, q_type));
941 return False;
942 }
943
944 print_sockaddr(addr, sizeof(addr), to_ss);
945
946 DEBUG(10, ("name_status_find: looking up %s#%02x at %s\n", q_name,
947 q_type, addr));
948
949 /* Check the cache first. */
950
951 if (namecache_status_fetch(q_name, q_type, type, to_ss, name)) {
952 return True;
953 }
954
955 if (to_ss->ss_family != AF_INET) {
956 /* Can't do node status to IPv6 */
957 return false;
958 }
959
960 set_socket_addr_v4(&ss);
961
962 /* W2K PDC's seem not to respond to '*'#0. JRA */
963 make_nmb_name(&nname, q_name, q_type);
964 status = node_status_query(talloc_tos(), &nname, to_ss,
965 &addrs, &count, NULL);
966 if (!NT_STATUS_IS_OK(status)) {
967 goto done;
968 }
969
970 for (i=0;i<count;i++) {
971 /* Find first one of the requested type that's not a GROUP. */
972 if (addrs[i].type == type && ! (addrs[i].flags & 0x80))
973 break;
974 }
975 if (i == count)
976 goto done;
977
978 pull_ascii_nstring(name, sizeof(fstring), addrs[i].name);
979
980 /* Store the result in the cache. */
981 /* but don't store an entry for 0x1c names here. Here we have
982 a single host and DOMAIN<0x1c> names should be a list of hosts */
983
984 if ( q_type != 0x1c ) {
985 namecache_status_store(q_name, q_type, type, to_ss, name);
986 }
987
988 result = true;
989
990 done:
991 TALLOC_FREE(addrs);
992
993 DEBUG(10, ("name_status_find: name %sfound", result ? "" : "not "));
994
995 if (result)
996 DEBUGADD(10, (", name %s ip address is %s", name, addr));
997
998 DEBUG(10, ("\n"));
999
1000 return result;
1001 }
1002
1003 /*
1004 comparison function used by sort_addr_list
1005 */
1006
1007 static int addr_compare(const struct sockaddr_storage *ss1,
1008 const struct sockaddr_storage *ss2)
1009 {
1010 int max_bits1=0, max_bits2=0;
1011 int num_interfaces = iface_count();
1012 int i;
1013
1014 /* Sort IPv4 addresses first. */
1015 if (ss1->ss_family != ss2->ss_family) {
1016 if (ss2->ss_family == AF_INET) {
1017 return 1;
1018 } else {
1019 return -1;
1020 }
1021 }
1022
1023 /* Here we know both addresses are of the same
1024 * family. */
1025
1026 for (i=0;i<num_interfaces;i++) {
1027 const struct sockaddr_storage *pss = iface_n_bcast(i);
1028 const unsigned char *p_ss1 = NULL;
1029 const unsigned char *p_ss2 = NULL;
1030 const unsigned char *p_if = NULL;
1031 size_t len = 0;
1032 int bits1, bits2;
1033
1034 if (pss->ss_family != ss1->ss_family) {
1035 /* Ignore interfaces of the wrong type. */
1036 continue;
1037 }
1038 if (pss->ss_family == AF_INET) {
1039 p_if = (const unsigned char *)
1040 &((const struct sockaddr_in *)pss)->sin_addr;
1041 p_ss1 = (const unsigned char *)
1042 &((const struct sockaddr_in *)ss1)->sin_addr;
1043 p_ss2 = (const unsigned char *)
1044 &((const struct sockaddr_in *)ss2)->sin_addr;
1045 len = 4;
1046 }
1047 #if defined(HAVE_IPV6)
1048 if (pss->ss_family == AF_INET6) {
1049 p_if = (const unsigned char *)
1050 &((const struct sockaddr_in6 *)pss)->sin6_addr;
1051 p_ss1 = (const unsigned char *)
1052 &((const struct sockaddr_in6 *)ss1)->sin6_addr;
1053 p_ss2 = (const unsigned char *)
1054 &((const struct sockaddr_in6 *)ss2)->sin6_addr;
1055 len = 16;
1056 }
1057 #endif
1058 if (!p_ss1 || !p_ss2 || !p_if || len == 0) {
1059 continue;
1060 }
1061 bits1 = matching_len_bits(p_ss1, p_if, len);
1062 bits2 = matching_len_bits(p_ss2, p_if, len);
1063 max_bits1 = MAX(bits1, max_bits1);
1064 max_bits2 = MAX(bits2, max_bits2);
1065 }
1066
1067 /* Bias towards directly reachable IPs */
1068 if (iface_local((const struct sockaddr *)ss1)) {
1069 if (ss1->ss_family == AF_INET) {
1070 max_bits1 += 32;
1071 } else {
1072 max_bits1 += 128;
1073 }
1074 }
1075 if (iface_local((const struct sockaddr *)ss2)) {
1076 if (ss2->ss_family == AF_INET) {
1077 max_bits2 += 32;
1078 } else {
1079 max_bits2 += 128;
1080 }
1081 }
1082 return max_bits2 - max_bits1;
1083 }
1084
1085 /*******************************************************************
1086 compare 2 ldap IPs by nearness to our interfaces - used in qsort
1087 *******************************************************************/
1088
1089 static int ip_service_compare(struct ip_service *ss1, struct ip_service *ss2)
1090 {
1091 int result;
1092
1093 if ((result = addr_compare(&ss1->ss, &ss2->ss)) != 0) {
1094 return result;
1095 }
1096
1097 if (ss1->port > ss2->port) {
1098 return 1;
1099 }
1100
1101 if (ss1->port < ss2->port) {
1102 return -1;
1103 }
1104
1105 return 0;
1106 }
1107
1108 /*
1109 sort an IP list so that names that are close to one of our interfaces
1110 are at the top. This prevents the problem where a WINS server returns an IP
1111 that is not reachable from our subnet as the first match
1112 */
1113
1114 static void sort_addr_list(struct sockaddr_storage *sslist, int count)
1115 {
1116 if (count <= 1) {
1117 return;
1118 }
1119
1120 TYPESAFE_QSORT(sslist, count, addr_compare);
1121 }
1122
1123 static void sort_service_list(struct ip_service *servlist, int count)
1124 {
1125 if (count <= 1) {
1126 return;
1127 }
1128
1129 TYPESAFE_QSORT(servlist, count, ip_service_compare);
1130 }
1131
1132 /**********************************************************************
1133 Remove any duplicate address/port pairs in the list
1134 *********************************************************************/
1135
1136 int remove_duplicate_addrs2(struct ip_service *iplist, int count )
1137 {
1138 int i, j;
1139
1140 DEBUG(10,("remove_duplicate_addrs2: "
1141 "looking for duplicate address/port pairs\n"));
1142
1143 /* One loop to set duplicates to a zero addr. */
1144 for ( i=0; i<count; i++ ) {
1145 if ( is_zero_addr(&iplist[i].ss)) {
1146 continue;
1147 }
1148
1149 for ( j=i+1; j<count; j++ ) {
1150 if (sockaddr_equal((struct sockaddr *)(void *)&iplist[i].ss,
1151 (struct sockaddr *)(void *)&iplist[j].ss) &&
1152 iplist[i].port == iplist[j].port) {
1153 zero_sockaddr(&iplist[j].ss);
1154 }
1155 }
1156 }
1157
1158 /* Now remove any addresses set to zero above. */
1159 for (i = 0; i < count; i++) {
1160 while (i < count &&
1161 is_zero_addr(&iplist[i].ss)) {
1162 if (count-i-1>0) {
1163 memmove(&iplist[i],
1164 &iplist[i+1],
1165 (count-i-1)*sizeof(struct ip_service));
1166 }
1167 count--;
1168 }
1169 }
1170
1171 return count;
1172 }
1173
1174 static bool prioritize_ipv4_list(struct ip_service *iplist, int count)
1175 {
1176 TALLOC_CTX *frame = talloc_stackframe();
1177 struct ip_service *iplist_new = talloc_array(frame, struct ip_service, count);
1178 int i, j;
1179
1180 if (iplist_new == NULL) {
1181 TALLOC_FREE(frame);
1182 return false;
1183 }
1184
1185 j = 0;
1186
1187 /* Copy IPv4 first. */
1188 for (i = 0; i < count; i++) {
1189 if (iplist[i].ss.ss_family == AF_INET) {
1190 iplist_new[j++] = iplist[i];
1191 }
1192 }
1193
1194 /* Copy IPv6. */
1195 for (i = 0; i < count; i++) {
1196 if (iplist[i].ss.ss_family != AF_INET) {
1197 iplist_new[j++] = iplist[i];
1198 }
1199 }
1200
1201 memcpy(iplist, iplist_new, sizeof(struct ip_service)*count);
1202 TALLOC_FREE(frame);
1203 return true;
1204 }
1205
1206 /****************************************************************************
1207 Do a netbios name query to find someones IP.
1208 Returns an array of IP addresses or NULL if none.
1209 *count will be set to the number of addresses returned.
1210 *timed_out is set if we failed by timing out
1211 ****************************************************************************/
1212
1213 struct name_query_state {
1214 struct sockaddr_storage my_addr;
1215 struct sockaddr_storage addr;
1216 bool bcast;
1217
1218
1219 uint8_t buf[1024];
1220 ssize_t buflen;
1221
1222 NTSTATUS validate_error;
1223 uint8_t flags;
1224
1225 struct sockaddr_storage *addrs;
1226 int num_addrs;
1227 };
1228
1229 static bool name_query_validator(struct packet_struct *p, void *private_data);
1230 static void name_query_done(struct tevent_req *subreq);
1231
1232 struct tevent_req *name_query_send(TALLOC_CTX *mem_ctx,
1233 struct tevent_context *ev,
1234 const char *name, int name_type,
1235 bool bcast, bool recurse,
1236 const struct sockaddr_storage *addr)
1237 {
1238 struct tevent_req *req, *subreq;
1239 struct name_query_state *state;
1240 struct packet_struct p;
1241 struct nmb_packet *nmb = &p.packet.nmb;
1242 struct sockaddr_in *in_addr;
1243
1244 req = tevent_req_create(mem_ctx, &state, struct name_query_state);
1245 if (req == NULL) {
1246 return NULL;
1247 }
1248 state->bcast = bcast;
1249
1250 if (addr->ss_family != AF_INET) {
1251 /* Can't do node status to IPv6 */
1252 tevent_req_nterror(req, NT_STATUS_INVALID_ADDRESS);
1253 return tevent_req_post(req, ev);
1254 }
1255
1256 if (lp_disable_netbios()) {
1257 DEBUG(5,("name_query(%s#%02x): netbios is disabled\n",
1258 name, name_type));
1259 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
1260 return tevent_req_post(req, ev);
1261 }
1262
1263 state->addr = *addr;
1264 in_addr = (struct sockaddr_in *)(void *)&state->addr;
1265 in_addr->sin_port = htons(NMB_PORT);
1266
1267 set_socket_addr_v4(&state->my_addr);
1268
1269 ZERO_STRUCT(p);
1270 nmb->header.name_trn_id = generate_trn_id();
1271 nmb->header.opcode = 0;
1272 nmb->header.response = false;
1273 nmb->header.nm_flags.bcast = bcast;
1274 nmb->header.nm_flags.recursion_available = false;
1275 nmb->header.nm_flags.recursion_desired = recurse;
1276 nmb->header.nm_flags.trunc = false;
1277 nmb->header.nm_flags.authoritative = false;
1278 nmb->header.rcode = 0;
1279 nmb->header.qdcount = 1;
1280 nmb->header.ancount = 0;
1281 nmb->header.nscount = 0;
1282 nmb->header.arcount = 0;
1283
1284 make_nmb_name(&nmb->question.question_name,name,name_type);
1285
1286 nmb->question.question_type = 0x20;
1287 nmb->question.question_class = 0x1;
1288
1289 state->buflen = build_packet((char *)state->buf, sizeof(state->buf),
1290 &p);
1291 if (state->buflen == 0) {
1292 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
1293 DEBUG(10, ("build_packet failed\n"));
1294 return tevent_req_post(req, ev);
1295 }
1296
1297 subreq = nb_trans_send(state, ev, &state->my_addr, &state->addr, bcast,
1298 state->buf, state->buflen,
1299 NMB_PACKET, nmb->header.name_trn_id,
1300 name_query_validator, state);
1301 if (tevent_req_nomem(subreq, req)) {
1302 DEBUG(10, ("nb_trans_send failed\n"));
1303 return tevent_req_post(req, ev);
1304 }
1305 tevent_req_set_callback(subreq, name_query_done, req);
1306 return req;
1307 }
1308
1309 static bool name_query_validator(struct packet_struct *p, void *private_data)
1310 {
1311 struct name_query_state *state = talloc_get_type_abort(
1312 private_data, struct name_query_state);
1313 struct nmb_packet *nmb = &p->packet.nmb;
1314 struct sockaddr_storage *tmp_addrs;
1315 bool got_unique_netbios_name = false;
1316 int i;
1317
1318 debug_nmb_packet(p);
1319
1320 /*
1321 * If we get a Negative Name Query Response from a WINS
1322 * server, we should report it and give up.
1323 */
1324 if( 0 == nmb->header.opcode /* A query response */
1325 && !state->bcast /* from a WINS server */
1326 && nmb->header.rcode /* Error returned */
1327 ) {
1328
1329 if( DEBUGLVL( 3 ) ) {
1330 /* Only executed if DEBUGLEVEL >= 3 */
1331 dbgtext( "Negative name query "
1332 "response, rcode 0x%02x: ",
1333 nmb->header.rcode );
1334 switch( nmb->header.rcode ) {
1335 case 0x01:
1336 dbgtext("Request was invalidly formatted.\n");
1337 break;
1338 case 0x02:
1339 dbgtext("Problem with NBNS, cannot process "
1340 "name.\n");
1341 break;
1342 case 0x03:
1343 dbgtext("The name requested does not "
1344 "exist.\n");
1345 break;
1346 case 0x04:
1347 dbgtext("Unsupported request error.\n");
1348 break;
1349 case 0x05:
1350 dbgtext("Query refused error.\n");
1351 break;
1352 default:
1353 dbgtext("Unrecognized error code.\n" );
1354 break;
1355 }
1356 }
1357
1358 /*
1359 * We accept this packet as valid, but tell the upper
1360 * layers that it's a negative response.
1361 */
1362 state->validate_error = NT_STATUS_NOT_FOUND;
1363 return true;
1364 }
1365
1366 if (nmb->header.opcode != 0 ||
1367 nmb->header.nm_flags.bcast ||
1368 nmb->header.rcode ||
1369 !nmb->header.ancount) {
1370 /*
1371 * XXXX what do we do with this? Could be a redirect,
1372 * but we'll discard it for the moment.
1373 */
1374 return false;
1375 }
1376
1377 tmp_addrs = talloc_realloc(
1378 state, state->addrs, struct sockaddr_storage,
1379 state->num_addrs + nmb->answers->rdlength/6);
1380 if (tmp_addrs == NULL) {
1381 state->validate_error = NT_STATUS_NO_MEMORY;
1382 return true;
1383 }
1384 state->addrs = tmp_addrs;
1385
1386 DEBUG(2,("Got a positive name query response "
1387 "from %s ( ", inet_ntoa(p->ip)));
1388
1389 for (i=0; i<nmb->answers->rdlength/6; i++) {
1390 uint16_t flags;
1391 struct in_addr ip;
1392 struct sockaddr_storage addr;
1393 int j;
1394
1395 flags = RSVAL(&nmb->answers->rdata[i*6], 0);
1396 got_unique_netbios_name |= ((flags & 0x8000) == 0);
1397
1398 putip((char *)&ip,&nmb->answers->rdata[2+i*6]);
1399 in_addr_to_sockaddr_storage(&addr, ip);
1400
1401 if (is_zero_addr(&addr)) {
1402 continue;
1403 }
1404
1405 for (j=0; j<state->num_addrs; j++) {
1406 if (sockaddr_equal(
1407 (struct sockaddr *)(void *)&addr,
1408 (struct sockaddr *)(void *)&state->addrs[j])) {
1409 break;
1410 }
1411 }
1412 if (j < state->num_addrs) {
1413 /* Already got it */
1414 continue;
1415 }
1416
1417 DEBUGADD(2,("%s ",inet_ntoa(ip)));
1418
1419 state->addrs[state->num_addrs] = addr;
1420 state->num_addrs += 1;
1421 }
1422 DEBUGADD(2,(")\n"));
1423
1424 /* We add the flags back ... */
1425 if (nmb->header.response)
1426 state->flags |= NM_FLAGS_RS;
1427 if (nmb->header.nm_flags.authoritative)
1428 state->flags |= NM_FLAGS_AA;
1429 if (nmb->header.nm_flags.trunc)
1430 state->flags |= NM_FLAGS_TC;
1431 if (nmb->header.nm_flags.recursion_desired)
1432 state->flags |= NM_FLAGS_RD;
1433 if (nmb->header.nm_flags.recursion_available)
1434 state->flags |= NM_FLAGS_RA;
1435 if (nmb->header.nm_flags.bcast)
1436 state->flags |= NM_FLAGS_B;
1437
1438 if (state->bcast) {
1439 /*
1440 * We have to collect all entries coming in from broadcast
1441 * queries. If we got a unique name, we're done.
1442 */
1443 return got_unique_netbios_name;
1444 }
1445 /*
1446 * WINS responses are accepted when they are received
1447 */
1448 return true;
1449 }
1450
1451 static void name_query_done(struct tevent_req *subreq)
1452 {
1453 struct tevent_req *req = tevent_req_callback_data(
1454 subreq, struct tevent_req);
1455 struct name_query_state *state = tevent_req_data(
1456 req, struct name_query_state);
1457 NTSTATUS status;
1458 struct packet_struct *p = NULL;
1459
1460 status = nb_trans_recv(subreq, &p);
1461 TALLOC_FREE(subreq);
1462 if (tevent_req_nterror(req, status)) {
1463 return;
1464 }
1465 if (!NT_STATUS_IS_OK(state->validate_error)) {
1466 tevent_req_nterror(req, state->validate_error);
1467 return;
1468 }
1469 if (p != NULL) {
1470 /*
1471 * Free the packet here, we've collected the response in the
1472 * validator
1473 */
1474 free_packet(p);
1475 }
1476 tevent_req_done(req);
1477 }
1478
1479 NTSTATUS name_query_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
1480 struct sockaddr_storage **addrs, int *num_addrs,
1481 uint8_t *flags)
1482 {
1483 struct name_query_state *state = tevent_req_data(
1484 req, struct name_query_state);
1485 NTSTATUS status;
1486
1487 if (tevent_req_is_nterror(req, &status)) {
1488 if (state->bcast &&
1489 NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
1490 /*
1491 * In the broadcast case we collect replies until the
1492 * timeout.
1493 */
1494 status = NT_STATUS_OK;
1495 }
1496 if (!NT_STATUS_IS_OK(status)) {
1497 return status;
1498 }
1499 }
1500 if (state->num_addrs == 0) {
1501 return NT_STATUS_NOT_FOUND;
1502 }
1503 *addrs = talloc_move(mem_ctx, &state->addrs);
1504 sort_addr_list(*addrs, state->num_addrs);
1505 *num_addrs = state->num_addrs;
1506 if (flags != NULL) {
1507 *flags = state->flags;
1508 }
1509 return NT_STATUS_OK;
1510 }
1511
1512 NTSTATUS name_query(const char *name, int name_type,
1513 bool bcast, bool recurse,
1514 const struct sockaddr_storage *to_ss,
1515 TALLOC_CTX *mem_ctx,
1516 struct sockaddr_storage **addrs,
1517 int *num_addrs, uint8_t *flags)
1518 {
1519 TALLOC_CTX *frame = talloc_stackframe();
1520 struct tevent_context *ev;
1521 struct tevent_req *req;
1522 struct timeval timeout;
1523 NTSTATUS status = NT_STATUS_NO_MEMORY;
1524
1525 ev = samba_tevent_context_init(frame);
1526 if (ev == NULL) {
1527 goto fail;
1528 }
1529 req = name_query_send(ev, ev, name, name_type, bcast, recurse, to_ss);
1530 if (req == NULL) {
1531 goto fail;
1532 }
1533 if (bcast) {
1534 timeout = timeval_current_ofs(0, 250000);
1535 } else {
1536 timeout = timeval_current_ofs(2, 0);
1537 }
1538 if (!tevent_req_set_endtime(req, ev, timeout)) {
1539 goto fail;
1540 }
1541 if (!tevent_req_poll_ntstatus(req, ev, &status)) {
1542 goto fail;
1543 }
1544 status = name_query_recv(req, mem_ctx, addrs, num_addrs, flags);
1545 fail:
1546 TALLOC_FREE(frame);
1547 return status;
1548 }
1549
1550 /********************************************************
1551 Convert an array if struct sockaddr_storage to struct ip_service
1552 return false on failure. Port is set to PORT_NONE;
1553 pcount is [in/out] - it is the length of ss_list on input,
1554 and the length of return_iplist on output as we remove any
1555 zero addresses from ss_list.
1556 *********************************************************/
1557
1558 static bool convert_ss2service(struct ip_service **return_iplist,
1559 const struct sockaddr_storage *ss_list,
1560 int *pcount)
1561 {
1562 int i;
1563 int orig_count = *pcount;
1564 int real_count = 0;
1565
1566 if (orig_count==0 || !ss_list )
1567 return False;
1568
1569 /* Filter out zero addrs. */
1570 for ( i=0; i<orig_count; i++ ) {
1571 if (is_zero_addr(&ss_list[i])) {
1572 continue;
1573 }
1574 real_count++;
1575 }
1576 if (real_count==0) {
1577 return false;
1578 }
1579
1580 /* copy the ip address; port will be PORT_NONE */
1581 if ((*return_iplist = SMB_MALLOC_ARRAY(struct ip_service, real_count)) ==
1582 NULL) {
1583 DEBUG(0,("convert_ip2service: malloc failed "
1584 "for %d enetries!\n", real_count ));
1585 return False;
1586 }
1587
1588 for ( i=0, real_count = 0; i<orig_count; i++ ) {
1589 if (is_zero_addr(&ss_list[i])) {
1590 continue;
1591 }
1592 (*return_iplist)[real_count].ss = ss_list[i];
1593 (*return_iplist)[real_count].port = PORT_NONE;
1594 real_count++;
1595 }
1596
1597 *pcount = real_count;
1598 return true;
1599 }
1600
1601 struct name_queries_state {
1602 struct tevent_context *ev;
1603 const char *name;
1604 int name_type;
1605 bool bcast;
1606 bool recurse;
1607 const struct sockaddr_storage *addrs;
1608 int num_addrs;
1609 int wait_msec;
1610 int timeout_msec;
1611
1612 struct tevent_req **subreqs;
1613 int num_received;
1614 int num_sent;
1615
1616 int received_index;
1617 struct sockaddr_storage *result_addrs;
1618 int num_result_addrs;
1619 uint8_t flags;
1620 };
1621
1622 static void name_queries_done(struct tevent_req *subreq);
1623 static void name_queries_next(struct tevent_req *subreq);
1624
1625 /*
1626 * Send a name query to multiple destinations with a wait time in between
1627 */
1628
1629 static struct tevent_req *name_queries_send(
1630 TALLOC_CTX *mem_ctx, struct tevent_context *ev,
1631 const char *name, int name_type,
1632 bool bcast, bool recurse,
1633 const struct sockaddr_storage *addrs,
1634 int num_addrs, int wait_msec, int timeout_msec)
1635 {
1636 struct tevent_req *req, *subreq;
1637 struct name_queries_state *state;
1638
1639 req = tevent_req_create(mem_ctx, &state,
1640 struct name_queries_state);
1641 if (req == NULL) {
1642 return NULL;
1643 }
1644 state->ev = ev;
1645 state->name = name;
1646 state->name_type = name_type;
1647 state->bcast = bcast;
1648 state->recurse = recurse;
1649 state->addrs = addrs;
1650 state->num_addrs = num_addrs;
1651 state->wait_msec = wait_msec;
1652 state->timeout_msec = timeout_msec;
1653
1654 state->subreqs = talloc_zero_array(
1655 state, struct tevent_req *, num_addrs);
1656 if (tevent_req_nomem(state->subreqs, req)) {
1657 return tevent_req_post(req, ev);
1658 }
1659 state->num_sent = 0;
1660
1661 subreq = name_query_send(
1662 state->subreqs, state->ev, name, name_type, bcast, recurse,
1663 &state->addrs[state->num_sent]);
1664 if (tevent_req_nomem(subreq, req)) {
1665 return tevent_req_post(req, ev);
1666 }
1667 if (!tevent_req_set_endtime(
1668 subreq, state->ev,
1669 timeval_current_ofs(0, state->timeout_msec * 1000))) {
1670 tevent_req_oom(req);
1671 return tevent_req_post(req, ev);
1672 }
1673 tevent_req_set_callback(subreq, name_queries_done, req);
1674
1675 state->subreqs[state->num_sent] = subreq;
1676 state->num_sent += 1;
1677
1678 if (state->num_sent < state->num_addrs) {
1679 subreq = tevent_wakeup_send(
1680 state, state->ev,
1681 timeval_current_ofs(0, state->wait_msec * 1000));
1682 if (tevent_req_nomem(subreq, req)) {
1683 return tevent_req_post(req, ev);
1684 }
1685 tevent_req_set_callback(subreq, name_queries_next, req);
1686 }
1687 return req;
1688 }
1689
1690 static void name_queries_done(struct tevent_req *subreq)
1691 {
1692 struct tevent_req *req = tevent_req_callback_data(
1693 subreq, struct tevent_req);
1694 struct name_queries_state *state = tevent_req_data(
1695 req, struct name_queries_state);
1696 int i;
1697 NTSTATUS status;
1698
1699 status = name_query_recv(subreq, state, &state->result_addrs,
1700 &state->num_result_addrs, &state->flags);
1701
1702 for (i=0; i<state->num_sent; i++) {
1703 if (state->subreqs[i] == subreq) {
1704 break;
1705 }
1706 }
1707 if (i == state->num_sent) {
1708 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
1709 return;
1710 }
1711 TALLOC_FREE(state->subreqs[i]);
1712
1713 state->num_received += 1;
1714
1715 if (!NT_STATUS_IS_OK(status)) {
1716
1717 if (state->num_received >= state->num_addrs) {
1718 tevent_req_nterror(req, status);
1719 return;
1720 }
1721 /*
1722 * Still outstanding requests, just wait
1723 */
1724 return;
1725 }
1726 state->received_index = i;
1727 tevent_req_done(req);
1728 }
1729
1730 static void name_queries_next(struct tevent_req *subreq)
1731 {
1732 struct tevent_req *req = tevent_req_callback_data(
1733 subreq, struct tevent_req);
1734 struct name_queries_state *state = tevent_req_data(
1735 req, struct name_queries_state);
1736
1737 if (!tevent_wakeup_recv(subreq)) {
1738 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
1739 return;
1740 }
1741
1742 subreq = name_query_send(
1743 state->subreqs, state->ev,
1744 state->name, state->name_type, state->bcast, state->recurse,
1745 &state->addrs[state->num_sent]);
1746 if (tevent_req_nomem(subreq, req)) {
1747 return;
1748 }
1749 tevent_req_set_callback(subreq, name_queries_done, req);
1750 if (!tevent_req_set_endtime(
1751 subreq, state->ev,
1752 timeval_current_ofs(0, state->timeout_msec * 1000))) {
1753 tevent_req_oom(req);
1754 return;
1755 }
1756 state->subreqs[state->num_sent] = subreq;
1757 state->num_sent += 1;
1758
1759 if (state->num_sent < state->num_addrs) {
1760 subreq = tevent_wakeup_send(
1761 state, state->ev,
1762 timeval_current_ofs(0, state->wait_msec * 1000));
1763 if (tevent_req_nomem(subreq, req)) {
1764 return;
1765 }
1766 tevent_req_set_callback(subreq, name_queries_next, req);
1767 }
1768 }
1769
1770 static NTSTATUS name_queries_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
1771 struct sockaddr_storage **result_addrs,
1772 int *num_result_addrs, uint8_t *flags,
1773 int *received_index)
1774 {
1775 struct name_queries_state *state = tevent_req_data(
1776 req, struct name_queries_state);
1777 NTSTATUS status;
1778
1779 if (tevent_req_is_nterror(req, &status)) {
1780 return status;
1781 }
1782
1783 if (result_addrs != NULL) {
1784 *result_addrs = talloc_move(mem_ctx, &state->result_addrs);
1785 }
1786 if (num_result_addrs != NULL) {
1787 *num_result_addrs = state->num_result_addrs;
1788 }
1789 if (flags != NULL) {
1790 *flags = state->flags;
1791 }
1792 if (received_index != NULL) {
1793 *received_index = state->received_index;
1794 }
1795 return NT_STATUS_OK;
1796 }
1797
1798 /********************************************************
1799 Resolve via "bcast" method.
1800 *********************************************************/
1801
1802 struct name_resolve_bcast_state {
1803 struct sockaddr_storage *addrs;
1804 int num_addrs;
1805 };
1806
1807 static void name_resolve_bcast_done(struct tevent_req *subreq);
1808
1809 struct tevent_req *name_resolve_bcast_send(TALLOC_CTX *mem_ctx,
1810 struct tevent_context *ev,
1811 const char *name,
1812 int name_type)
1813 {
1814 struct tevent_req *req, *subreq;
1815 struct name_resolve_bcast_state *state;
1816 struct sockaddr_storage *bcast_addrs;
1817 int i, num_addrs, num_bcast_addrs;
1818
1819 req = tevent_req_create(mem_ctx, &state,
1820 struct name_resolve_bcast_state);
1821 if (req == NULL) {
1822 return NULL;
1823 }
1824
1825 if (lp_disable_netbios()) {
1826 DEBUG(5, ("name_resolve_bcast(%s#%02x): netbios is disabled\n",
1827 name, name_type));
1828 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
1829 return tevent_req_post(req, ev);
1830 }
1831
1832 /*
1833 * "bcast" means do a broadcast lookup on all the local interfaces.
1834 */
1835
1836 DEBUG(3, ("name_resolve_bcast: Attempting broadcast lookup "
1837 "for name %s<0x%x>\n", name, name_type));
1838
1839 num_addrs = iface_count();
1840 bcast_addrs = talloc_array(state, struct sockaddr_storage, num_addrs);
1841 if (tevent_req_nomem(bcast_addrs, req)) {
1842 return tevent_req_post(req, ev);
1843 }
1844
1845 /*
1846 * Lookup the name on all the interfaces, return on
1847 * the first successful match.
1848 */
1849 num_bcast_addrs = 0;
1850
1851 for (i=0; i<num_addrs; i++) {
1852 const struct sockaddr_storage *pss = iface_n_bcast(i);
1853
1854 if (pss->ss_family != AF_INET) {
1855 continue;
1856 }
1857 bcast_addrs[num_bcast_addrs] = *pss;
1858 num_bcast_addrs += 1;
1859 }
1860
1861 subreq = name_queries_send(state, ev, name, name_type, true, true,
1862 bcast_addrs, num_bcast_addrs, 0, 1000);
1863 if (tevent_req_nomem(subreq, req)) {
1864 return tevent_req_post(req, ev);
1865 }
1866 tevent_req_set_callback(subreq, name_resolve_bcast_done, req);
1867 return req;
1868 }
1869
1870 static void name_resolve_bcast_done(struct tevent_req *subreq)
1871 {
1872 struct tevent_req *req = tevent_req_callback_data(
1873 subreq, struct tevent_req);
1874 struct name_resolve_bcast_state *state = tevent_req_data(
1875 req, struct name_resolve_bcast_state);
1876 NTSTATUS status;
1877
1878 status = name_queries_recv(subreq, state,
1879 &state->addrs, &state->num_addrs,
1880 NULL, NULL);
1881 TALLOC_FREE(subreq);
1882 if (tevent_req_nterror(req, status)) {
1883 return;
1884 }
1885 tevent_req_done(req);
1886 }
1887
1888 NTSTATUS name_resolve_bcast_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
1889 struct sockaddr_storage **addrs,
1890 int *num_addrs)
1891 {
1892 struct name_resolve_bcast_state *state = tevent_req_data(
1893 req, struct name_resolve_bcast_state);
1894 NTSTATUS status;
1895
1896 if (tevent_req_is_nterror(req, &status)) {
1897 return status;
1898 }
1899 *addrs = talloc_move(mem_ctx, &state->addrs);
1900 *num_addrs = state->num_addrs;
1901 return NT_STATUS_OK;
1902 }
1903
1904 NTSTATUS name_resolve_bcast(const char *name,
1905 int name_type,
1906 TALLOC_CTX *mem_ctx,
1907 struct sockaddr_storage **return_iplist,
1908 int *return_count)
1909 {
1910 TALLOC_CTX *frame = talloc_stackframe();
1911 struct tevent_context *ev;
1912 struct tevent_req *req;
1913 NTSTATUS status = NT_STATUS_NO_MEMORY;
1914
1915 ev = samba_tevent_context_init(frame);
1916 if (ev == NULL) {
1917 goto fail;
1918 }
1919 req = name_resolve_bcast_send(frame, ev, name, name_type);
1920 if (req == NULL) {
1921 goto fail;
1922 }
1923 if (!tevent_req_poll_ntstatus(req, ev, &status)) {
1924 goto fail;
1925 }
1926 status = name_resolve_bcast_recv(req, mem_ctx, return_iplist,
1927 return_count);
1928 fail:
1929 TALLOC_FREE(frame);
1930 return status;
1931 }
1932
1933 struct query_wins_list_state {
1934 struct tevent_context *ev;
1935 const char *name;
1936 uint8_t name_type;
1937 struct in_addr *servers;
1938 uint32_t num_servers;
1939 struct sockaddr_storage server;
1940 uint32_t num_sent;
1941
1942 struct sockaddr_storage *addrs;
1943 int num_addrs;
1944 uint8_t flags;
1945 };
1946
1947 static void query_wins_list_done(struct tevent_req *subreq);
1948
1949 /*
1950 * Query a list of (replicating) wins servers in sequence, call them
1951 * dead if they don't reply
1952 */
1953
1954 static struct tevent_req *query_wins_list_send(
1955 TALLOC_CTX *mem_ctx, struct tevent_context *ev,
1956 struct in_addr src_ip, const char *name, uint8_t name_type,
1957 struct in_addr *servers, int num_servers)
1958 {
1959 struct tevent_req *req, *subreq;
1960 struct query_wins_list_state *state;
1961
1962 req = tevent_req_create(mem_ctx, &state,
1963 struct query_wins_list_state);
1964 if (req == NULL) {
1965 return NULL;
1966 }
1967 state->ev = ev;
1968 state->name = name;
1969 state->name_type = name_type;
1970 state->servers = servers;
1971 state->num_servers = num_servers;
1972
1973 if (state->num_servers == 0) {
1974 tevent_req_nterror(req, NT_STATUS_NOT_FOUND);
1975 return tevent_req_post(req, ev);
1976 }
1977
1978 in_addr_to_sockaddr_storage(
1979 &state->server, state->servers[state->num_sent]);
1980
1981 subreq = name_query_send(state, state->ev,
1982 state->name, state->name_type,
1983 false, true, &state->server);
1984 state->num_sent += 1;
1985 if (tevent_req_nomem(subreq, req)) {
1986 return tevent_req_post(req, ev);
1987 }
1988 if (!tevent_req_set_endtime(subreq, state->ev,
1989 timeval_current_ofs(2, 0))) {
1990 tevent_req_oom(req);
1991 return tevent_req_post(req, ev);
1992 }
1993 tevent_req_set_callback(subreq, query_wins_list_done, req);
1994 return req;
1995 }
1996
1997 static void query_wins_list_done(struct tevent_req *subreq)
1998 {
1999 struct tevent_req *req = tevent_req_callback_data(
2000 subreq, struct tevent_req);
2001 struct query_wins_list_state *state = tevent_req_data(
2002 req, struct query_wins_list_state);
2003 NTSTATUS status;
2004
2005 status = name_query_recv(subreq, state,
2006 &state->addrs, &state->num_addrs,
2007 &state->flags);
2008 TALLOC_FREE(subreq);
2009 if (NT_STATUS_IS_OK(status)) {
2010 tevent_req_done(req);
2011 return;
2012 }
2013 if (!NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
2014 tevent_req_nterror(req, status);
2015 return;
2016 }
2017 wins_srv_died(state->servers[state->num_sent-1],
2018 my_socket_addr_v4());
2019
2020 if (state->num_sent == state->num_servers) {
2021 tevent_req_nterror(req, NT_STATUS_NOT_FOUND);
2022 return;
2023 }
2024
2025 in_addr_to_sockaddr_storage(
2026 &state->server, state->servers[state->num_sent]);
2027
2028 subreq = name_query_send(state, state->ev,
2029 state->name, state->name_type,
2030 false, true, &state->server);
2031 state->num_sent += 1;
2032 if (tevent_req_nomem(subreq, req)) {
2033 return;
2034 }
2035 if (!tevent_req_set_endtime(subreq, state->ev,
2036 timeval_current_ofs(2, 0))) {
2037 tevent_req_oom(req);
2038 return;
2039 }
2040 tevent_req_set_callback(subreq, query_wins_list_done, req);
2041 }
2042
2043 static NTSTATUS query_wins_list_recv(struct tevent_req *req,
2044 TALLOC_CTX *mem_ctx,
2045 struct sockaddr_storage **addrs,
2046 int *num_addrs,
2047 uint8_t *flags)
2048 {
2049 struct query_wins_list_state *state = tevent_req_data(
2050 req, struct query_wins_list_state);
2051 NTSTATUS status;
2052
2053 if (tevent_req_is_nterror(req, &status)) {
2054 return status;
2055 }
2056 if (addrs != NULL) {
2057 *addrs = talloc_move(mem_ctx, &state->addrs);
2058 }
2059 if (num_addrs != NULL) {
2060 *num_addrs = state->num_addrs;
2061 }
2062 if (flags != NULL) {
2063 *flags = state->flags;
2064 }
2065 return NT_STATUS_OK;
2066 }
2067
2068 struct resolve_wins_state {
2069 int num_sent;
2070 int num_received;
2071
2072 struct sockaddr_storage *addrs;
2073 int num_addrs;
2074 uint8_t flags;
2075 };
2076
2077 static void resolve_wins_done(struct tevent_req *subreq);
2078
2079 struct tevent_req *resolve_wins_send(TALLOC_CTX *mem_ctx,
2080 struct tevent_context *ev,
2081 const char *name,
2082 int name_type)
2083 {
2084 struct tevent_req *req, *subreq;
2085 struct resolve_wins_state *state;
2086 char **wins_tags = NULL;
2087 struct sockaddr_storage src_ss;
2088 struct in_addr src_ip;
2089 int i, num_wins_tags;
2090
2091 req = tevent_req_create(mem_ctx, &state,
2092 struct resolve_wins_state);
2093 if (req == NULL) {
2094 return NULL;
2095 }
2096
2097 if (wins_srv_count() < 1) {
2098 DEBUG(3,("resolve_wins: WINS server resolution selected "
2099 "and no WINS servers listed.\n"));
2100 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
2101 goto fail;
2102 }
2103
2104 /* the address we will be sending from */
2105 if (!interpret_string_addr(&src_ss, lp_nbt_client_socket_address(),
2106 AI_NUMERICHOST|AI_PASSIVE)) {
2107 zero_sockaddr(&src_ss);
2108 }
2109
2110 if (src_ss.ss_family != AF_INET) {
2111 char addr[INET6_ADDRSTRLEN];
2112 print_sockaddr(addr, sizeof(addr), &src_ss);
2113 DEBUG(3,("resolve_wins: cannot receive WINS replies "
2114 "on IPv6 address %s\n",
2115 addr));
2116 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
2117 goto fail;
2118 }
2119
2120 src_ip = ((const struct sockaddr_in *)(void *)&src_ss)->sin_addr;
2121
2122 wins_tags = wins_srv_tags();
2123 if (wins_tags == NULL) {
2124 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
2125 goto fail;
2126 }
2127
2128 num_wins_tags = 0;
2129 while (wins_tags[num_wins_tags] != NULL) {
2130 num_wins_tags += 1;
2131 }
2132
2133 for (i=0; i<num_wins_tags; i++) {
2134 int num_servers, num_alive;
2135 struct in_addr *servers, *alive;
2136 int j;
2137
2138 if (!wins_server_tag_ips(wins_tags[i], talloc_tos(),
2139 &servers, &num_servers)) {
2140 DEBUG(10, ("wins_server_tag_ips failed for tag %s\n",
2141 wins_tags[i]));
2142 continue;
2143 }
2144
2145 alive = talloc_array(state, struct in_addr, num_servers);
2146 if (tevent_req_nomem(alive, req)) {
2147 goto fail;
2148 }
2149
2150 num_alive = 0;
2151 for (j=0; j<num_servers; j++) {
2152 struct in_addr wins_ip = servers[j];
2153
2154 if (global_in_nmbd && ismyip_v4(wins_ip)) {
2155 /* yikes! we'll loop forever */
2156 continue;
2157 }
2158 /* skip any that have been unresponsive lately */
2159 if (wins_srv_is_dead(wins_ip, src_ip)) {
2160 continue;
2161 }
2162 DEBUG(3, ("resolve_wins: using WINS server %s "
2163 "and tag '%s'\n",
2164 inet_ntoa(wins_ip), wins_tags[i]));
2165 alive[num_alive] = wins_ip;
2166 num_alive += 1;
2167 }
2168 TALLOC_FREE(servers);
2169
2170 if (num_alive == 0) {
2171 continue;
2172 }
2173
2174 subreq = query_wins_list_send(
2175 state, ev, src_ip, name, name_type,
2176 alive, num_alive);
2177 if (tevent_req_nomem(subreq, req)) {
2178 goto fail;
2179 }
2180 tevent_req_set_callback(subreq, resolve_wins_done, req);
2181 state->num_sent += 1;
2182 }
2183
2184 if (state->num_sent == 0) {
2185 tevent_req_nterror(req, NT_STATUS_NOT_FOUND);
2186 goto fail;
2187 }
2188
2189 wins_srv_tags_free(wins_tags);
2190 return req;
2191 fail:
2192 wins_srv_tags_free(wins_tags);
2193 return tevent_req_post(req, ev);
2194 }
2195
2196 static void resolve_wins_done(struct tevent_req *subreq)
2197 {
2198 struct tevent_req *req = tevent_req_callback_data(
2199 subreq, struct tevent_req);
2200 struct resolve_wins_state *state = tevent_req_data(
2201 req, struct resolve_wins_state);
2202 NTSTATUS status;
2203
2204 status = query_wins_list_recv(subreq, state, &state->addrs,
2205 &state->num_addrs, &state->flags);
2206 if (NT_STATUS_IS_OK(status)) {
2207 tevent_req_done(req);
2208 return;
2209 }
2210
2211 state->num_received += 1;
2212
2213 if (state->num_received < state->num_sent) {
2214 /*
2215 * Wait for the others
2216 */
2217 return;
2218 }
2219 tevent_req_nterror(req, status);
2220 }
2221
2222 NTSTATUS resolve_wins_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
2223 struct sockaddr_storage **addrs,
2224 int *num_addrs, uint8_t *flags)
2225 {
2226 struct resolve_wins_state *state = tevent_req_data(
2227 req, struct resolve_wins_state);
2228 NTSTATUS status;
2229
2230 if (tevent_req_is_nterror(req, &status)) {
2231 return status;
2232 }
2233 if (addrs != NULL) {
2234 *addrs = talloc_move(mem_ctx, &state->addrs);
2235 }
2236 if (num_addrs != NULL) {
2237 *num_addrs = state->num_addrs;
2238 }
2239 if (flags != NULL) {
2240 *flags = state->flags;
2241 }
2242 return NT_STATUS_OK;
2243 }
2244
2245 /********************************************************
2246 Resolve via "wins" method.
2247 *********************************************************/
2248
2249 NTSTATUS resolve_wins(const char *name,
2250 int name_type,
2251 TALLOC_CTX *mem_ctx,
2252 struct sockaddr_storage **return_iplist,
2253 int *return_count)
2254 {
2255 struct tevent_context *ev;
2256 struct tevent_req *req;
2257 NTSTATUS status = NT_STATUS_NO_MEMORY;
2258
2259 ev = samba_tevent_context_init(talloc_tos());
2260 if (ev == NULL) {
2261 goto fail;
2262 }
2263 req = resolve_wins_send(ev, ev, name, name_type);
2264 if (req == NULL) {
2265 goto fail;
2266 }
2267 if (!tevent_req_poll_ntstatus(req, ev, &status)) {
2268 goto fail;
2269 }
2270 status = resolve_wins_recv(req, mem_ctx, return_iplist, return_count,
2271 NULL);
2272 fail:
2273 TALLOC_FREE(ev);
2274 return status;
2275 }
2276
2277 /********************************************************
2278 Resolve via "hosts" method.
2279 *********************************************************/
2280
2281 static NTSTATUS resolve_hosts(const char *name, int name_type,
2282 TALLOC_CTX *mem_ctx,
2283 struct sockaddr_storage **return_iplist,
2284 int *return_count)
2285 {
2286 /*
2287 * "host" means do a localhost, or dns lookup.
2288 */
2289 struct addrinfo hints;
2290 struct addrinfo *ailist = NULL;
2291 struct addrinfo *res = NULL;
2292 int ret = -1;
2293 int i = 0;
2294
2295 if ( name_type != 0x20 && name_type != 0x0) {
2296 DEBUG(5, ("resolve_hosts: not appropriate "
2297 "for name type <0x%x>\n",
2298 name_type));
2299 return NT_STATUS_INVALID_PARAMETER;
2300 }
2301
2302 *return_iplist = NULL;
2303 *return_count = 0;
2304
2305 DEBUG(3,("resolve_hosts: Attempting host lookup for name %s<0x%x>\n",
2306 name, name_type));
2307
2308 ZERO_STRUCT(hints);
2309 /* By default make sure it supports TCP. */
2310 hints.ai_socktype = SOCK_STREAM;
2311 hints.ai_flags = AI_ADDRCONFIG;
2312
2313 #if !defined(HAVE_IPV6)
2314 /* Unless we have IPv6, we really only want IPv4 addresses back. */
2315 hints.ai_family = AF_INET;
2316 #endif
2317
2318 ret = getaddrinfo(name,
2319 NULL,
2320 &hints,
2321 &ailist);
2322 if (ret) {
2323 DEBUG(3,("resolve_hosts: getaddrinfo failed for name %s [%s]\n",
2324 name,
2325 gai_strerror(ret) ));
2326 }
2327
2328 for (res = ailist; res; res = res->ai_next) {
2329 struct sockaddr_storage ss;
2330
2331 if (!res->ai_addr || res->ai_addrlen == 0) {
2332 continue;
2333 }
2334
2335 ZERO_STRUCT(ss);
2336 memcpy(&ss, res->ai_addr, res->ai_addrlen);
2337
2338 if (is_zero_addr(&ss)) {
2339 continue;
2340 }
2341
2342 *return_count += 1;
2343
2344 *return_iplist = talloc_realloc(
2345 mem_ctx, *return_iplist, struct sockaddr_storage,
2346 *return_count);
2347 if (!*return_iplist) {
2348 DEBUG(3,("resolve_hosts: malloc fail !\n"));
2349 freeaddrinfo(ailist);
2350 return NT_STATUS_NO_MEMORY;
2351 }
2352 (*return_iplist)[i] = ss;
2353 i++;
2354 }
2355 if (ailist) {
2356 freeaddrinfo(ailist);
2357 }
2358 if (*return_count) {
2359 return NT_STATUS_OK;
2360 }
2361 return NT_STATUS_UNSUCCESSFUL;
2362 }
2363
2364 /********************************************************
2365 Resolve via "ADS" method.
2366 *********************************************************/
2367
2368 /* Special name type used to cause a _kerberos DNS lookup. */
2369 #define KDC_NAME_TYPE 0xDCDC
2370
2371 static NTSTATUS resolve_ads(const char *name,
2372 int name_type,
2373 const char *sitename,
2374 struct ip_service **return_iplist,
2375 int *return_count)
2376 {
2377 int i;
2378 NTSTATUS status;
2379 TALLOC_CTX *ctx;
2380 struct dns_rr_srv *dcs = NULL;
2381 int numdcs = 0;
2382 int numaddrs = 0;
2383
2384 if ((name_type != 0x1c) && (name_type != KDC_NAME_TYPE) &&
2385 (name_type != 0x1b)) {
2386 return NT_STATUS_INVALID_PARAMETER;
2387 }
2388
2389 if ( (ctx = talloc_init("resolve_ads")) == NULL ) {
2390 DEBUG(0,("resolve_ads: talloc_init() failed!\n"));
2391 return NT_STATUS_NO_MEMORY;
2392 }
2393
2394 /* The DNS code needs fixing to find IPv6 addresses... JRA. */
2395 switch (name_type) {
2396 case 0x1b:
2397 DEBUG(5,("resolve_ads: Attempting to resolve "
2398 "PDC for %s using DNS\n", name));
2399 status = ads_dns_query_pdc(ctx,
2400 name,
2401 &dcs,
2402 &numdcs);
2403 break;
2404
2405 case 0x1c:
2406 DEBUG(5,("resolve_ads: Attempting to resolve "
2407 "DCs for %s using DNS\n", name));
2408 status = ads_dns_query_dcs(ctx,
2409 name,
2410 sitename,
2411 &dcs,
2412 &numdcs);
2413 break;
2414 case KDC_NAME_TYPE:
2415 DEBUG(5,("resolve_ads: Attempting to resolve "
2416 "KDCs for %s using DNS\n", name));
2417 status = ads_dns_query_kdcs(ctx,
2418 name,
2419 sitename,
2420 &dcs,
2421 &numdcs);
2422 break;
2423 default:
2424 status = NT_STATUS_INVALID_PARAMETER;
2425 break;
2426 }
2427
2428 if ( !NT_STATUS_IS_OK( status ) ) {
2429 talloc_destroy(ctx);
2430 return status;
2431 }
2432
2433 if (numdcs == 0) {
2434 *return_iplist = NULL;
2435 *return_count = 0;
2436 talloc_destroy(ctx);
2437 return NT_STATUS_OK;
2438 }
2439
2440 for (i=0;i<numdcs;i++) {
2441 if (!dcs[i].ss_s) {
2442 numaddrs += 1;
2443 } else {
2444 numaddrs += dcs[i].num_ips;
2445 }
2446 }
2447
2448 if ((*return_iplist = SMB_MALLOC_ARRAY(struct ip_service, numaddrs)) ==
2449 NULL ) {
2450 DEBUG(0,("resolve_ads: malloc failed for %d entries\n",
2451 numaddrs ));
2452 talloc_destroy(ctx);
2453 return NT_STATUS_NO_MEMORY;
2454 }
2455
2456 /* now unroll the list of IP addresses */
2457
2458 *return_count = 0;
2459
2460 for (i = 0; i < numdcs && (*return_count<numaddrs); i++ ) {
2461 /* If we don't have an IP list for a name, lookup it up */
2462 if (!dcs[i].ss_s) {
2463 /* We need to get all IP addresses here. */
2464 struct addrinfo *res = NULL;
2465 struct addrinfo *p;
2466 int extra_addrs = 0;
2467
2468 if (!interpret_string_addr_internal(&res,
2469 dcs[i].hostname,
2470 0)) {
2471 continue;
2472 }
2473 /* Add in every IP from the lookup. How
2474 many is that ? */
2475 for (p = res; p; p = p->ai_next) {
2476 struct sockaddr_storage ss;
2477 memcpy(&ss, p->ai_addr, p->ai_addrlen);
2478 if (is_zero_addr(&ss)) {
2479 continue;
2480 }
2481 extra_addrs++;
2482 }
2483 if (extra_addrs > 1) {
2484 /* We need to expand the return_iplist array
2485 as we only budgeted for one address. */
2486 numaddrs += (extra_addrs-1);
2487 *return_iplist = SMB_REALLOC_ARRAY(*return_iplist,
2488 struct ip_service,
2489 numaddrs);
2490 if (*return_iplist == NULL) {
2491 if (res) {
2492 freeaddrinfo(res);
2493 }
2494 talloc_destroy(ctx);
2495 return NT_STATUS_NO_MEMORY;
2496 }
2497 }
2498 for (p = res; p; p = p->ai_next) {
2499 (*return_iplist)[*return_count].port = dcs[i].port;
2500 memcpy(&(*return_iplist)[*return_count].ss,
2501 p->ai_addr,
2502 p->ai_addrlen);
2503 if (is_zero_addr(&(*return_iplist)[*return_count].ss)) {
2504 continue;
2505 }
2506 (*return_count)++;
2507 /* Should never happen, but still... */
2508 if (*return_count>=numaddrs) {
2509 break;
2510 }
2511 }
2512 if (res) {
2513 freeaddrinfo(res);
2514 }
2515 } else {
2516 /* use all the IP addresses from the SRV sresponse */
2517 int j;
2518 for (j = 0; j < dcs[i].num_ips; j++) {
2519 (*return_iplist)[*return_count].port = dcs[i].port;
2520 (*return_iplist)[*return_count].ss = dcs[i].ss_s[j];
2521 if (is_zero_addr(&(*return_iplist)[*return_count].ss)) {
2522 continue;
2523 }
2524 (*return_count)++;
2525 /* Should never happen, but still... */
2526 if (*return_count>=numaddrs) {
2527 break;
2528 }
2529 }
2530 }
2531 }
2532
2533 talloc_destroy(ctx);
2534 return NT_STATUS_OK;
2535 }
2536
2537 static const char **filter_out_nbt_lookup(TALLOC_CTX *mem_ctx,
2538 const char **resolve_order)
2539 {
2540 size_t i, len, result_idx;
2541 const char **result;
2542
2543 len = 0;
2544 while (resolve_order[len] != NULL) {
2545 len += 1;
2546 }
2547
2548 result = talloc_array(mem_ctx, const char *, len+1);
2549 if (result == NULL) {
2550 return NULL;
2551 }
2552
2553 result_idx = 0;
2554
2555 for (i=0; i<len; i++) {
2556 const char *tok = resolve_order[i];
2557
2558 if (strequal(tok, "lmhosts") || strequal(tok, "wins") ||
2559 strequal(tok, "bcast")) {
2560 continue;
2561 }
2562 result[result_idx++] = tok;
2563 }
2564 result[result_idx] = NULL;
2565
2566 return result;
2567 }
2568
2569 /*******************************************************************
2570 Internal interface to resolve a name into an IP address.
2571 Use this function if the string is either an IP address, DNS
2572 or host name or NetBIOS name. This uses the name switch in the
2573 smb.conf to determine the order of name resolution.
2574
2575 Added support for ip addr/port to support ADS ldap servers.
2576 the only place we currently care about the port is in the
2577 resolve_hosts() when looking up DC's via SRV RR entries in DNS
2578 **********************************************************************/
2579
2580 NTSTATUS internal_resolve_name(const char *name,
2581 int name_type,
2582 const char *sitename,
2583 struct ip_service **return_iplist,
2584 int *return_count,
2585 const char **resolve_order)
2586 {
2587 const char *tok;
2588 NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
2589 int i;
2590 TALLOC_CTX *frame = NULL;
2591
2592 *return_iplist = NULL;
2593 *return_count = 0;
2594
2595 DEBUG(10, ("internal_resolve_name: looking up %s#%x (sitename %s)\n",
2596 name, name_type, sitename ? sitename : "(null)"));
2597
2598 if (is_ipaddress(name)) {
2599 if ((*return_iplist = SMB_MALLOC_P(struct ip_service)) ==
2600 NULL) {
2601 DEBUG(0,("internal_resolve_name: malloc fail !\n"));
2602 return NT_STATUS_NO_MEMORY;
2603 }
2604
2605 /* ignore the port here */
2606 (*return_iplist)->port = PORT_NONE;
2607
2608 /* if it's in the form of an IP address then get the lib to interpret it */
2609 if (!interpret_string_addr(&(*return_iplist)->ss,
2610 name, AI_NUMERICHOST)) {
2611 DEBUG(1,("internal_resolve_name: interpret_string_addr "
2612 "failed on %s\n",
2613 name));
2614 SAFE_FREE(*return_iplist);
2615 return NT_STATUS_INVALID_PARAMETER;
2616 }
2617 if (is_zero_addr(&(*return_iplist)->ss)) {
2618 SAFE_FREE(*return_iplist);
2619 return NT_STATUS_UNSUCCESSFUL;
2620 }
2621 *return_count = 1;
2622 return NT_STATUS_OK;
2623 }
2624
2625 /* Check name cache */
2626
2627 if (namecache_fetch(name, name_type, return_iplist, return_count)) {
2628 *return_count = remove_duplicate_addrs2(*return_iplist,
2629 *return_count );
2630 /* This could be a negative response */
2631 if (*return_count > 0) {
2632 return NT_STATUS_OK;
2633 } else {
2634 return NT_STATUS_UNSUCCESSFUL;
2635 }
2636 }
2637
2638 /* set the name resolution order */
2639
2640 if (resolve_order && strcmp(resolve_order[0], "NULL") == 0) {
2641 DEBUG(8,("internal_resolve_name: all lookups disabled\n"));
2642 return NT_STATUS_INVALID_PARAMETER;
2643 }
2644
2645 if (!resolve_order || !resolve_order[0]) {
2646 static const char *host_order[] = { "host", NULL };
2647 resolve_order = host_order;
2648 }
2649
2650 frame = talloc_stackframe();
2651
2652 if ((strlen(name) > MAX_NETBIOSNAME_LEN - 1) ||
2653 (strchr(name, '.') != NULL)) {
2654 /*
2655 * Don't do NBT lookup, the name would not fit anyway
2656 */
2657 resolve_order = filter_out_nbt_lookup(frame, resolve_order);
2658 if (resolve_order == NULL) {
2659 TALLOC_FREE(frame);
2660 return NT_STATUS_NO_MEMORY;
2661 }
2662 }
2663
2664 /* iterate through the name resolution backends */
2665
2666 for (i=0; resolve_order[i]; i++) {
2667 tok = resolve_order[i];
2668
2669 if((strequal(tok, "host") || strequal(tok, "hosts"))) {
2670 struct sockaddr_storage *ss_list;
2671 status = resolve_hosts(name, name_type,
2672 talloc_tos(), &ss_list,
2673 return_count);
2674 if (NT_STATUS_IS_OK(status)) {
2675 if (!convert_ss2service(return_iplist,
2676 ss_list,
2677 return_count)) {
2678 status = NT_STATUS_NO_MEMORY;
2679 }
2680 goto done;
2681 }
2682 } else if(strequal( tok, "kdc")) {
2683 /* deal with KDC_NAME_TYPE names here.
2684 * This will result in a SRV record lookup */
2685 status = resolve_ads(name, KDC_NAME_TYPE, sitename,
2686 return_iplist, return_count);
2687 if (NT_STATUS_IS_OK(status)) {
2688 /* Ensure we don't namecache
2689 * this with the KDC port. */
2690 name_type = KDC_NAME_TYPE;
2691 goto done;
2692 }
2693 } else if(strequal( tok, "ads")) {
2694 /* deal with 0x1c and 0x1b names here.
2695 * This will result in a SRV record lookup */
2696 status = resolve_ads(name, name_type, sitename,
2697 return_iplist, return_count);
2698 if (NT_STATUS_IS_OK(status)) {
2699 goto done;
2700 }
2701 } else if (strequal(tok, "lmhosts")) {
2702 struct sockaddr_storage *ss_list;
2703 status = resolve_lmhosts_file_as_sockaddr(
2704 get_dyn_LMHOSTSFILE(), name, name_type,
2705 talloc_tos(), &ss_list, return_count);
2706 if (NT_STATUS_IS_OK(status)) {
2707 if (!convert_ss2service(return_iplist,
2708 ss_list,
2709 return_count)) {
2710 status = NT_STATUS_NO_MEMORY;
2711 }
2712 goto done;
2713 }
2714 } else if (strequal(tok, "wins")) {
2715 /* don't resolve 1D via WINS */
2716 struct sockaddr_storage *ss_list;
2717 if (name_type != 0x1D) {
2718 status = resolve_wins(name, name_type,
2719 talloc_tos(),
2720 &ss_list,
2721 return_count);
2722 if (NT_STATUS_IS_OK(status)) {
2723 if (!convert_ss2service(return_iplist,
2724 ss_list,
2725 return_count)) {
2726 status = NT_STATUS_NO_MEMORY;
2727 }
2728 goto done;
2729 }
2730 }
2731 } else if (strequal(tok, "bcast")) {
2732 struct sockaddr_storage *ss_list;
2733 status = name_resolve_bcast(
2734 name, name_type, talloc_tos(),
2735 &ss_list, return_count);
2736 if (NT_STATUS_IS_OK(status)) {
2737 if (!convert_ss2service(return_iplist,
2738 ss_list,
2739 return_count)) {
2740 status = NT_STATUS_NO_MEMORY;
2741 }
2742 goto done;
2743 }
2744 } else {
2745 DEBUG(0,("resolve_name: unknown name switch type %s\n",
2746 tok));
2747 }
2748 }
2749
2750 /* All of the resolve_* functions above have returned false. */
2751
2752 TALLOC_FREE(frame);
2753 SAFE_FREE(*return_iplist);
2754 *return_count = 0;
2755
2756 return NT_STATUS_UNSUCCESSFUL;
2757
2758 done:
2759
2760 /* Remove duplicate entries. Some queries, notably #1c (domain
2761 controllers) return the PDC in iplist[0] and then all domain
2762 controllers including the PDC in iplist[1..n]. Iterating over
2763 the iplist when the PDC is down will cause two sets of timeouts. */
2764
2765 *return_count = remove_duplicate_addrs2(*return_iplist, *return_count );
2766
2767 /* Save in name cache */
2768 if ( DEBUGLEVEL >= 100 ) {
2769 for (i = 0; i < *return_count && DEBUGLEVEL == 100; i++) {
2770 char addr[INET6_ADDRSTRLEN];
2771 print_sockaddr(addr, sizeof(addr),
2772 &(*return_iplist)[i].ss);
2773 DEBUG(100, ("Storing name %s of type %d (%s:%d)\n",
2774 name,
2775 name_type,
2776 addr,
2777 (*return_iplist)[i].port));
2778 }
2779 }
2780
2781 if (*return_count) {
2782 namecache_store(name, name_type, *return_count, *return_iplist);
2783 }
2784
2785 /* Display some debugging info */
2786
2787 if ( DEBUGLEVEL >= 10 ) {
2788 DEBUG(10, ("internal_resolve_name: returning %d addresses: ",
2789 *return_count));
2790
2791 for (i = 0; i < *return_count; i++) {
2792 char addr[INET6_ADDRSTRLEN];
2793 print_sockaddr(addr, sizeof(addr),
2794 &(*return_iplist)[i].ss);
2795 DEBUGADD(10, ("%s:%d ",
2796 addr,
2797 (*return_iplist)[i].port));
2798 }
2799 DEBUG(10, ("\n"));
2800 }
2801
2802 TALLOC_FREE(frame);
2803 return status;
2804 }
2805
2806 /********************************************************
2807 Internal interface to resolve a name into one IP address.
2808 Use this function if the string is either an IP address, DNS
2809 or host name or NetBIOS name. This uses the name switch in the
2810 smb.conf to determine the order of name resolution.
2811 *********************************************************/
2812
2813 bool resolve_name(const char *name,
2814 struct sockaddr_storage *return_ss,
2815 int name_type,
2816 bool prefer_ipv4)
2817 {
2818 struct ip_service *ss_list = NULL;
2819 char *sitename = NULL;
2820 int count = 0;
2821 NTSTATUS status;
2822
2823 if (is_ipaddress(name)) {
2824 return interpret_string_addr(return_ss, name, AI_NUMERICHOST);
2825 }
2826
2827 sitename = sitename_fetch(talloc_tos(), lp_realm()); /* wild guess */
2828
2829 status = internal_resolve_name(name, name_type, sitename,
2830 &ss_list, &count,
2831 lp_name_resolve_order());
2832 if (NT_STATUS_IS_OK(status)) {
2833 int i;
2834
2835 if (prefer_ipv4) {
2836 for (i=0; i<count; i++) {
2837 if (!is_zero_addr(&ss_list[i].ss) &&
2838 !is_broadcast_addr((struct sockaddr *)(void *)&ss_list[i].ss) &&
2839 (ss_list[i].ss.ss_family == AF_INET)) {
2840 *return_ss = ss_list[i].ss;
2841 SAFE_FREE(ss_list);
2842 TALLOC_FREE(sitename);
2843 return True;
2844 }
2845 }
2846 }
2847
2848 /* only return valid addresses for TCP connections */
2849 for (i=0; i<count; i++) {
2850 if (!is_zero_addr(&ss_list[i].ss) &&
2851 !is_broadcast_addr((struct sockaddr *)(void *)&ss_list[i].ss)) {
2852 *return_ss = ss_list[i].ss;
2853 SAFE_FREE(ss_list);
2854 TALLOC_FREE(sitename);
2855 return True;
2856 }
2857 }
2858 }
2859
2860 SAFE_FREE(ss_list);
2861 TALLOC_FREE(sitename);
2862 return False;
2863 }
2864
2865 /********************************************************
2866 Internal interface to resolve a name into a list of IP addresses.
2867 Use this function if the string is either an IP address, DNS
2868 or host name or NetBIOS name. This uses the name switch in the
2869 smb.conf to determine the order of name resolution.
2870 *********************************************************/
2871
2872 NTSTATUS resolve_name_list(TALLOC_CTX *ctx,
2873 const char *name,
2874 int name_type,
2875 struct sockaddr_storage **return_ss_arr,
2876 unsigned int *p_num_entries)
2877 {
2878 struct ip_service *ss_list = NULL;
2879 char *sitename = NULL;
2880 int count = 0;
2881 int i;
2882 unsigned int num_entries;
2883 NTSTATUS status;
2884
2885 *p_num_entries = 0;
2886 *return_ss_arr = NULL;
2887
2888 if (is_ipaddress(name)) {
2889 *return_ss_arr = talloc(ctx, struct sockaddr_storage);
2890 if (!*return_ss_arr) {
2891 return NT_STATUS_NO_MEMORY;
2892 }
2893 if (!interpret_string_addr(*return_ss_arr, name, AI_NUMERICHOST)) {
2894 TALLOC_FREE(*return_ss_arr);
2895 return NT_STATUS_BAD_NETWORK_NAME;
2896 }
2897 *p_num_entries = 1;
2898 return NT_STATUS_OK;
2899 }
2900
2901 sitename = sitename_fetch(ctx, lp_realm()); /* wild guess */
2902
2903 status = internal_resolve_name(name, name_type, sitename,
2904 &ss_list, &count,
2905 lp_name_resolve_order());
2906 TALLOC_FREE(sitename);
2907
2908 if (!NT_STATUS_IS_OK(status)) {
2909 return status;
2910 }
2911
2912 /* only return valid addresses for TCP connections */
2913 for (i=0, num_entries = 0; i<count; i++) {
2914 if (!is_zero_addr(&ss_list[i].ss) &&
2915 !is_broadcast_addr((struct sockaddr *)(void *)&ss_list[i].ss)) {
2916 num_entries++;
2917 }
2918 }
2919 if (num_entries == 0) {
2920 SAFE_FREE(ss_list);
2921 return NT_STATUS_BAD_NETWORK_NAME;
2922 }
2923
2924 *return_ss_arr = talloc_array(ctx,
2925 struct sockaddr_storage,
2926 num_entries);
2927 if (!(*return_ss_arr)) {
2928 SAFE_FREE(ss_list);
2929 return NT_STATUS_NO_MEMORY;
2930 }
2931
2932 for (i=0, num_entries = 0; i<count; i++) {
2933 if (!is_zero_addr(&ss_list[i].ss) &&
2934 !is_broadcast_addr((struct sockaddr *)(void *)&ss_list[i].ss)) {
2935 (*return_ss_arr)[num_entries++] = ss_list[i].ss;
2936 }
2937 }
2938
2939 status = NT_STATUS_OK;
2940 *p_num_entries = num_entries;
2941
2942 SAFE_FREE(ss_list);
2943 return NT_STATUS_OK;
2944 }
2945
2946 /********************************************************
2947 Find the IP address of the master browser or DMB for a workgroup.
2948 *********************************************************/
2949
2950 bool find_master_ip(const char *group, struct sockaddr_storage *master_ss)
2951 {
2952 struct ip_service *ip_list = NULL;
2953 int count = 0;
2954 NTSTATUS status;
2955
2956 if (lp_disable_netbios()) {
2957 DEBUG(5,("find_master_ip(%s): netbios is disabled\n", group));
2958 return false;
2959 }
2960
2961 status = internal_resolve_name(group, 0x1D, NULL, &ip_list, &count,
2962 lp_name_resolve_order());
2963 if (NT_STATUS_IS_OK(status)) {
2964 *master_ss = ip_list[0].ss;
2965 SAFE_FREE(ip_list);
2966 return true;
2967 }
2968
2969 status = internal_resolve_name(group, 0x1B, NULL, &ip_list, &count,
2970 lp_name_resolve_order());
2971 if (NT_STATUS_IS_OK(status)) {
2972 *master_ss = ip_list[0].ss;
2973 SAFE_FREE(ip_list);
2974 return true;
2975 }
2976
2977 SAFE_FREE(ip_list);
2978 return false;
2979 }
2980
2981 /********************************************************
2982 Get the IP address list of the primary domain controller
2983 for a domain.
2984 *********************************************************/
2985
2986 bool get_pdc_ip(const char *domain, struct sockaddr_storage *pss)
2987 {
2988 struct ip_service *ip_list = NULL;
2989 int count = 0;
2990 NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
2991 static const char *ads_order[] = { "ads", NULL };
2992 /* Look up #1B name */
2993
2994 if (lp_security() == SEC_ADS) {
2995 status = internal_resolve_name(domain, 0x1b, NULL, &ip_list,
2996 &count, ads_order);
2997 }
2998
2999 if (!NT_STATUS_IS_OK(status) || count == 0) {
3000 status = internal_resolve_name(domain, 0x1b, NULL, &ip_list,
3001 &count,
3002 lp_name_resolve_order());
3003 if (!NT_STATUS_IS_OK(status)) {
3004 SAFE_FREE(ip_list);
3005 return false;
3006 }
3007 }
3008
3009 /* if we get more than 1 IP back we have to assume it is a
3010 multi-homed PDC and not a mess up */
3011
3012 if ( count > 1 ) {
3013 DEBUG(6,("get_pdc_ip: PDC has %d IP addresses!\n", count));
3014 sort_service_list(ip_list, count);
3015 }
3016
3017 *pss = ip_list[0].ss;
3018 SAFE_FREE(ip_list);
3019 return true;
3020 }
3021
3022 /* Private enum type for lookups. */
3023
3024 enum dc_lookup_type { DC_NORMAL_LOOKUP, DC_ADS_ONLY, DC_KDC_ONLY };
3025
3026 /********************************************************
3027 Get the IP address list of the domain controllers for
3028 a domain.
3029 *********************************************************/
3030
3031 static NTSTATUS get_dc_list(const char *domain,
3032 const char *sitename,
3033 struct ip_service **ip_list,
3034 int *count,
3035 enum dc_lookup_type lookup_type,
3036 bool *ordered)
3037 {
3038 const char **resolve_order = NULL;
3039 char *saf_servername = NULL;
3040 char *pserver = NULL;
3041 const char *p;
3042 char *port_str = NULL;
3043 int port;
3044 char *name;
3045 int num_addresses = 0;
3046 int local_count, i, j;
3047 struct ip_service *return_iplist = NULL;
3048 struct ip_service *auto_ip_list = NULL;
3049 bool done_auto_lookup = false;
3050 int auto_count = 0;
3051 NTSTATUS status;
3052 TALLOC_CTX *ctx = talloc_init("get_dc_list");
3053 int auto_name_type = 0x1C;
3054
3055 *ip_list = NULL;
3056 *count = 0;
3057
3058 if (!ctx) {
3059 return NT_STATUS_NO_MEMORY;
3060 }
3061
3062 *ordered = False;
3063
3064 /* if we are restricted to solely using DNS for looking
3065 up a domain controller, make sure that host lookups
3066 are enabled for the 'name resolve order'. If host lookups
3067 are disabled and ads_only is True, then set the string to
3068 NULL. */
3069
3070 resolve_order = lp_name_resolve_order();
3071 if (!resolve_order) {
3072 status = NT_STATUS_NO_MEMORY;
3073 goto out;
3074 }
3075 if (lookup_type == DC_ADS_ONLY) {
3076 if (str_list_check_ci(resolve_order, "host")) {
3077 static const char *ads_order[] = { "ads", NULL };
3078 resolve_order = ads_order;
3079
3080 /* DNS SRV lookups used by the ads resolver
3081 are already sorted by priority and weight */
3082 *ordered = true;
3083 } else {
3084 /* this is quite bizarre! */
3085 static const char *null_order[] = { "NULL", NULL };
3086 resolve_order = null_order;
3087 }
3088 } else if (lookup_type == DC_KDC_ONLY) {
3089 static const char *kdc_order[] = { "kdc", NULL };
3090 /* DNS SRV lookups used by the ads/kdc resolver
3091 are already sorted by priority and weight */
3092 *ordered = true;
3093 resolve_order = kdc_order;
3094 auto_name_type = KDC_NAME_TYPE;
3095 }
3096
3097 /* fetch the server we have affinity for. Add the
3098 'password server' list to a search for our domain controllers */
3099
3100 saf_servername = saf_fetch(ctx, domain);
3101
3102 if (strequal(domain, lp_workgroup()) || strequal(domain, lp_realm())) {
3103 pserver = talloc_asprintf(ctx, "%s, %s",
3104 saf_servername ? saf_servername : "",
3105 lp_password_server());
3106 } else {
3107 pserver = talloc_asprintf(ctx, "%s, *",
3108 saf_servername ? saf_servername : "");
3109 }
3110
3111 TALLOC_FREE(saf_servername);
3112 if (!pserver) {
3113 status = NT_STATUS_NO_MEMORY;
3114 goto out;
3115 }
3116
3117 DEBUG(3,("get_dc_list: preferred server list: \"%s\"\n", pserver ));
3118
3119 /*
3120 * if '*' appears in the "password server" list then add
3121 * an auto lookup to the list of manually configured
3122 * DC's. If any DC is listed by name, then the list should be
3123 * considered to be ordered
3124 */
3125
3126 p = pserver;
3127 while (next_token_talloc(ctx, &p, &name, LIST_SEP)) {
3128 if (!done_auto_lookup && strequal(name, "*")) {
3129 status = internal_resolve_name(domain, auto_name_type,
3130 sitename,
3131 &auto_ip_list,
3132 &auto_count,
3133 resolve_order);
3134 if (NT_STATUS_IS_OK(status)) {
3135 num_addresses += auto_count;
3136 }
3137 done_auto_lookup = true;
3138 DEBUG(8,("Adding %d DC's from auto lookup\n",
3139 auto_count));
3140 } else {
3141 num_addresses++;
3142 }
3143 }
3144
3145 /* if we have no addresses and haven't done the auto lookup, then
3146 just return the list of DC's. Or maybe we just failed. */
3147
3148 if (num_addresses == 0) {
3149 if (done_auto_lookup) {
3150 DEBUG(4,("get_dc_list: no servers found\n"));
3151 status = NT_STATUS_NO_LOGON_SERVERS;
3152 goto out;
3153 }
3154 status = internal_resolve_name(domain, auto_name_type,
3155 sitename, ip_list,
3156 count, resolve_order);
3157 goto out;
3158 }
3159
3160 if ((return_iplist = SMB_MALLOC_ARRAY(struct ip_service,
3161 num_addresses)) == NULL) {
3162 DEBUG(3,("get_dc_list: malloc fail !\n"));
3163 status = NT_STATUS_NO_MEMORY;
3164 goto out;
3165 }
3166
3167 p = pserver;
3168 local_count = 0;
3169
3170 /* fill in the return list now with real IP's */
3171
3172 while ((local_count<num_addresses) &&
3173 next_token_talloc(ctx, &p, &name, LIST_SEP)) {
3174 struct sockaddr_storage name_ss;
3175
3176 /* copy any addresses from the auto lookup */
3177
3178 if (strequal(name, "*")) {
3179 for (j=0; j<auto_count; j++) {
3180 char addr[INET6_ADDRSTRLEN];
3181 print_sockaddr(addr,
3182 sizeof(addr),
3183 &auto_ip_list[j].ss);
3184 /* Check for and don't copy any
3185 * known bad DC IP's. */
3186 if(!NT_STATUS_IS_OK(check_negative_conn_cache(
3187 domain,
3188 addr))) {
3189 DEBUG(5,("get_dc_list: "
3190 "negative entry %s removed "
3191 "from DC list\n",
3192 addr));
3193 continue;
3194 }
3195 return_iplist[local_count].ss =
3196 auto_ip_list[j].ss;
3197 return_iplist[local_count].port =
3198 auto_ip_list[j].port;
3199 local_count++;
3200 }
3201 continue;
3202 }
3203
3204 /* added support for address:port syntax for ads
3205 * (not that I think anyone will ever run the LDAP
3206 * server in an AD domain on something other than
3207 * port 389
3208 * However, the port should not be used for kerberos
3209 */
3210
3211 port = (lookup_type == DC_ADS_ONLY) ? LDAP_PORT :
3212 ((lookup_type == DC_KDC_ONLY) ? DEFAULT_KRB5_PORT :
3213 PORT_NONE);
3214 if ((port_str=strchr(name, ':')) != NULL) {
3215 *port_str = '\0';
3216 if (lookup_type != DC_KDC_ONLY) {
3217 port_str++;
3218 port = atoi(port_str);
3219 }
3220 }
3221
3222 /* explicit lookup; resolve_name() will
3223 * handle names & IP addresses */
3224 if (resolve_name( name, &name_ss, 0x20, true )) {
3225 char addr[INET6_ADDRSTRLEN];
3226 print_sockaddr(addr,
3227 sizeof(addr),
3228 &name_ss);
3229
3230 /* Check for and don't copy any known bad DC IP's. */
3231 if( !NT_STATUS_IS_OK(check_negative_conn_cache(domain,
3232 addr)) ) {
3233 DEBUG(5,("get_dc_list: negative entry %s "
3234 "removed from DC list\n",
3235 name ));
3236 continue;
3237 }
3238
3239 return_iplist[local_count].ss = name_ss;
3240 return_iplist[local_count].port = port;
3241 local_count++;
3242 *ordered = true;
3243 }
3244 }
3245
3246 /* need to remove duplicates in the list if we have any
3247 explicit password servers */
3248
3249 local_count = remove_duplicate_addrs2(return_iplist, local_count );
3250
3251 /* For DC's we always prioritize IPv4 due to W2K3 not
3252 * supporting LDAP, KRB5 or CLDAP over IPv6. */
3253
3254 if (local_count && return_iplist) {
3255 prioritize_ipv4_list(return_iplist, local_count);
3256 }
3257
3258 if ( DEBUGLEVEL >= 4 ) {
3259 DEBUG(4,("get_dc_list: returning %d ip addresses "
3260 "in an %sordered list\n",
3261 local_count,
3262 *ordered ? "":"un"));
3263 DEBUG(4,("get_dc_list: "));
3264 for ( i=0; i<local_count; i++ ) {
3265 char addr[INET6_ADDRSTRLEN];
3266 print_sockaddr(addr,
3267 sizeof(addr),
3268 &return_iplist[i].ss);
3269 DEBUGADD(4,("%s:%d ", addr, return_iplist[i].port ));
3270 }
3271 DEBUGADD(4,("\n"));
3272 }
3273
3274 *ip_list = return_iplist;
3275 *count = local_count;
3276
3277 status = ( *count != 0 ? NT_STATUS_OK : NT_STATUS_NO_LOGON_SERVERS );
3278
3279 out:
3280
3281 if (!NT_STATUS_IS_OK(status)) {
3282 SAFE_FREE(return_iplist);
3283 *ip_list = NULL;
3284 *count = 0;
3285 }
3286
3287 SAFE_FREE(auto_ip_list);
3288 TALLOC_FREE(ctx);
3289 return status;
3290 }
3291
3292 /*********************************************************************
3293 Small wrapper function to get the DC list and sort it if neccessary.
3294 *********************************************************************/
3295
3296 NTSTATUS get_sorted_dc_list( const char *domain,
3297 const char *sitename,
3298 struct ip_service **ip_list,
3299 int *count,
3300 bool ads_only )
3301 {
3302 bool ordered = false;
3303 NTSTATUS status;
3304 enum dc_lookup_type lookup_type = DC_NORMAL_LOOKUP;
3305
3306 *ip_list = NULL;
3307 *count = 0;
3308
3309 DEBUG(8,("get_sorted_dc_list: attempting lookup "
3310 "for name %s (sitename %s)\n",
3311 domain,
3312 sitename ? sitename : "NULL"));
3313
3314 if (ads_only) {
3315 lookup_type = DC_ADS_ONLY;
3316 }
3317
3318 status = get_dc_list(domain, sitename, ip_list,
3319 count, lookup_type, &ordered);
3320 if (NT_STATUS_EQUAL(status, NT_STATUS_NO_LOGON_SERVERS)
3321 && sitename) {
3322 DEBUG(3,("get_sorted_dc_list: no server for name %s available"
3323 " in site %s, fallback to all servers\n",
3324 domain, sitename));
3325 status = get_dc_list(domain, NULL, ip_list,
3326 count, lookup_type, &ordered);
3327 }
3328
3329 if (!NT_STATUS_IS_OK(status)) {
3330 SAFE_FREE(*ip_list);
3331 *count = 0;
3332 return status;
3333 }
3334
3335 /* only sort if we don't already have an ordered list */
3336 if (!ordered) {
3337 sort_service_list(*ip_list, *count);
3338 }
3339
3340 return NT_STATUS_OK;
3341 }
3342
3343 /*********************************************************************
3344 Get the KDC list - re-use all the logic in get_dc_list.
3345 *********************************************************************/
3346
3347 NTSTATUS get_kdc_list( const char *realm,
3348 const char *sitename,
3349 struct ip_service **ip_list,
3350 int *count)
3351 {
3352 bool ordered;
3353 NTSTATUS status;
3354
3355 *count = 0;
3356 *ip_list = NULL;
3357
3358 status = get_dc_list(realm, sitename, ip_list,
3359 count, DC_KDC_ONLY, &ordered);
3360
3361 if (!NT_STATUS_IS_OK(status)) {
3362 SAFE_FREE(*ip_list);
3363 *count = 0;
3364 return status;
3365 }
3366
3367 /* only sort if we don't already have an ordered list */
3368 if ( !ordered ) {
3369 sort_service_list(*ip_list, *count);
3370 }
3371
3372 return NT_STATUS_OK;
3373 }
Samba GIT mirror