source: trunk/server/source3/nmbd/nmbd_processlogon.c

Last change on this file was 745, checked in by Silvan Scherrer, 13 years ago

Samba Server: updated trunk to 3.6.0
File size: 18.0 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 NBT netbios routines and daemon - version 2
4 Copyright (C) Andrew Tridgell 1994-1998
5 Copyright (C) Luke Kenneth Casson Leighton 1994-1998
6 Copyright (C) Jeremy Allison 1994-2003
7 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2002
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
21
22 Revision History:
23
24*/
25
26#include "includes.h"
27#include "../libcli/netlogon/netlogon.h"
28#include "../libcli/cldap/cldap.h"
29#include "../lib/tsocket/tsocket.h"
30#include "../libcli/security/security.h"
31#include "secrets.h"
32#include "nmbd/nmbd.h"
33
34struct sam_database_info {
35 uint32 index;
36 uint32 serial_lo, serial_hi;
37 uint32 date_lo, date_hi;
38};
39
40/**
41 * check whether the client belongs to the hosts
42 * for which initial logon should be delayed...
43 */
44static bool delay_logon(const char *peer_name, const char *peer_addr)
45{
46 const char **delay_list = lp_init_logon_delayed_hosts();
47 const char *peer[2];
48
49 if (delay_list == NULL) {
50 return False;
51 }
52
53 peer[0] = peer_name;
54 peer[1] = peer_addr;
55
56 return list_match(delay_list, (const char *)peer, client_match);
57}
58
59static void delayed_init_logon_handler(struct event_context *event_ctx,
60 struct timed_event *te,
61 struct timeval now,
62 void *private_data)
63{
64 struct packet_struct *p = (struct packet_struct *)private_data;
65
66 DEBUG(10, ("delayed_init_logon_handler (%lx): re-queuing packet.\n",
67 (unsigned long)te));
68
69 queue_packet(p);
70
71 TALLOC_FREE(te);
72}
73
74struct nmbd_proxy_logon_context {
75 struct cldap_socket *cldap_sock;
76};
77
78static struct nmbd_proxy_logon_context *global_nmbd_proxy_logon;
79
80bool initialize_nmbd_proxy_logon(void)
81{
82 const char *cldap_server = lp_parm_const_string(-1, "nmbd_proxy_logon",
83 "cldap_server", NULL);
84 struct nmbd_proxy_logon_context *ctx;
85 NTSTATUS status;
86 struct in_addr addr;
87 char addrstr[INET_ADDRSTRLEN];
88 const char *server_str;
89 int ret;
90 struct tsocket_address *server_addr;
91
92 if (!cldap_server) {
93 return true;
94 }
95
96 addr = interpret_addr2(cldap_server);
97 server_str = inet_ntop(AF_INET, &addr,
98 addrstr, sizeof(addrstr));
99 if (!server_str || strcmp("0.0.0.0", server_str) == 0) {
100 DEBUG(0,("Failed to resolve[%s] for nmbd_proxy_logon\n",
101 cldap_server));
102 return false;
103 }
104
105 ctx = talloc_zero(nmbd_event_context(),
106 struct nmbd_proxy_logon_context);
107 if (!ctx) {
108 return false;
109 }
110
111 ret = tsocket_address_inet_from_strings(ctx, "ipv4",
112 server_str, LDAP_PORT,
113 &server_addr);
114 if (ret != 0) {
115 TALLOC_FREE(ctx);
116 status = map_nt_error_from_unix(errno);
117 DEBUG(0,("Failed to create cldap tsocket_address for %s - %s\n",
118 server_str, nt_errstr(status)));
119 return false;
120 }
121
122 /* we create a connected udp socket */
123 status = cldap_socket_init(ctx, nmbd_event_context(), NULL,
124 server_addr, &ctx->cldap_sock);
125 TALLOC_FREE(server_addr);
126 if (!NT_STATUS_IS_OK(status)) {
127 TALLOC_FREE(ctx);
128 DEBUG(0,("failed to create cldap socket for %s: %s\n",
129 server_str, nt_errstr(status)));
130 return false;
131 }
132
133 global_nmbd_proxy_logon = ctx;
134 return true;
135}
136
137struct nmbd_proxy_logon_state {
138 struct in_addr local_ip;
139 struct packet_struct *p;
140 const char *remote_name;
141 uint8_t remote_name_type;
142 const char *remote_mailslot;
143 struct nbt_netlogon_packet req;
144 struct nbt_netlogon_response resp;
145 struct cldap_netlogon io;
146};
147
148static int nmbd_proxy_logon_state_destructor(struct nmbd_proxy_logon_state *s)
149{
150 s->p->locked = false;
151 free_packet(s->p);
152 return 0;
153}
154
155static void nmbd_proxy_logon_done(struct tevent_req *subreq);
156
157static void nmbd_proxy_logon(struct nmbd_proxy_logon_context *ctx,
158 struct in_addr local_ip,
159 struct packet_struct *p,
160 uint8_t *buf,
161 uint32_t len)
162{
163 struct nmbd_proxy_logon_state *state;
164 enum ndr_err_code ndr_err;
165 DATA_BLOB blob = data_blob_const(buf, len);
166 const char *computer_name = NULL;
167 const char *mailslot_name = NULL;
168 const char *user_name = NULL;
169 const char *domain_sid = NULL;
170 uint32_t acct_control = 0;
171 uint32_t nt_version = 0;
172 struct tevent_req *subreq;
173 fstring source_name;
174 struct dgram_packet *dgram = &p->packet.dgram;
175
176 state = TALLOC_ZERO_P(ctx, struct nmbd_proxy_logon_state);
177 if (!state) {
178 DEBUG(0,("failed to allocate nmbd_proxy_logon_state\n"));
179 return;
180 }
181
182 pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
183 state->remote_name = talloc_strdup(state, source_name);
184 state->remote_name_type = dgram->source_name.name_type,
185 state->local_ip = local_ip;
186 state->p = p;
187
188 ndr_err = ndr_pull_struct_blob(
189 &blob, state, &state->req,
190 (ndr_pull_flags_fn_t)ndr_pull_nbt_netlogon_packet);
191 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
192 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
193 DEBUG(0,("failed parse nbt_netlogon_packet: %s\n",
194 nt_errstr(status)));
195 TALLOC_FREE(state);
196 return;
197 }
198
199 if (DEBUGLEVEL >= 10) {
200 DEBUG(10, ("nmbd_proxy_logon:\n"));
201 NDR_PRINT_DEBUG(nbt_netlogon_packet, &state->req);
202 }
203
204 switch (state->req.command) {
205 case LOGON_SAM_LOGON_REQUEST:
206 computer_name = state->req.req.logon.computer_name;
207 user_name = state->req.req.logon.user_name;
208 mailslot_name = state->req.req.logon.mailslot_name;
209 acct_control = state->req.req.logon.acct_control;
210 if (state->req.req.logon.sid_size > 0) {
211 domain_sid = dom_sid_string(state,
212 &state->req.req.logon.sid);
213 if (!domain_sid) {
214 DEBUG(0,("failed to get a string for sid\n"));
215 TALLOC_FREE(state);
216 return;
217 }
218 }
219 nt_version = state->req.req.logon.nt_version;
220 break;
221
222 default:
223 /* this can't happen as the caller already checks the command */
224 break;
225 }
226
227 state->remote_mailslot = mailslot_name;
228
229 if (user_name && strlen(user_name) == 0) {
230 user_name = NULL;
231 }
232
233 if (computer_name && strlen(computer_name) == 0) {
234 computer_name = NULL;
235 }
236
237 /*
238 * as the socket is connected,
239 * we don't need to specify the destination
240 */
241 state->io.in.dest_address = NULL;
242 state->io.in.dest_port = 0;
243 state->io.in.realm = NULL;
244 state->io.in.host = computer_name;
245 state->io.in.user = user_name;
246 state->io.in.domain_guid = NULL;
247 state->io.in.domain_sid = domain_sid;
248 state->io.in.acct_control = acct_control;
249 state->io.in.version = nt_version;
250 state->io.in.map_response = false;
251
252 subreq = cldap_netlogon_send(state,
253 ctx->cldap_sock,
254 &state->io);
255 if (!subreq) {
256 DEBUG(0,("failed to send cldap netlogon call\n"));
257 TALLOC_FREE(state);
258 return;
259 }
260 tevent_req_set_callback(subreq, nmbd_proxy_logon_done, state);
261
262 /* we reply async */
263 state->p->locked = true;
264 talloc_set_destructor(state, nmbd_proxy_logon_state_destructor);
265}
266
267static void nmbd_proxy_logon_done(struct tevent_req *subreq)
268{
269 struct nmbd_proxy_logon_state *state =
270 tevent_req_callback_data(subreq,
271 struct nmbd_proxy_logon_state);
272 NTSTATUS status;
273 DATA_BLOB response = data_blob_null;
274
275 status = cldap_netlogon_recv(subreq, state, &state->io);
276 if (!NT_STATUS_IS_OK(status)) {
277 DEBUG(0,("failed to recv cldap netlogon call: %s\n",
278 nt_errstr(status)));
279 TALLOC_FREE(state);
280 return;
281 }
282
283 status = push_netlogon_samlogon_response(&response, state,
284 &state->io.out.netlogon);
285 if (!NT_STATUS_IS_OK(status)) {
286 DEBUG(0,("failed to push netlogon_samlogon_response: %s\n",
287 nt_errstr(status)));
288 TALLOC_FREE(state);
289 return;
290 }
291
292 send_mailslot(true, state->remote_mailslot,
293 (char *)response.data, response.length,
294 global_myname(), 0x0,
295 state->remote_name,
296 state->remote_name_type,
297 state->p->ip,
298 state->local_ip,
299 state->p->port);
300 TALLOC_FREE(state);
301}
302
303/****************************************************************************
304Process a domain logon packet
305**************************************************************************/
306
307void process_logon_packet(struct packet_struct *p, const char *buf,int len,
308 const char *mailslot)
309{
310 fstring source_name;
311 struct dgram_packet *dgram = &p->packet.dgram;
312 struct sockaddr_storage ss;
313 const struct sockaddr_storage *pss;
314 struct in_addr ip;
315
316 DATA_BLOB blob_in, blob_out;
317 enum ndr_err_code ndr_err;
318 struct nbt_netlogon_packet request;
319 struct nbt_netlogon_response response;
320 NTSTATUS status;
321 const char *pdc_name;
322
323 in_addr_to_sockaddr_storage(&ss, p->ip);
324 pss = iface_ip((struct sockaddr *)&ss);
325 if (!pss) {
326 DEBUG(5,("process_logon_packet:can't find outgoing interface "
327 "for packet from IP %s\n",
328 inet_ntoa(p->ip) ));
329 return;
330 }
331 ip = ((struct sockaddr_in *)pss)->sin_addr;
332
333 if (!lp_domain_logons()) {
334 DEBUG(5,("process_logon_packet: Logon packet received from IP %s and domain \
335logons are not enabled.\n", inet_ntoa(p->ip) ));
336 return;
337 }
338
339 pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
340
341 pdc_name = talloc_asprintf(talloc_tos(), "\\\\%s", global_myname());
342 if (!pdc_name) {
343 return;
344 }
345
346 ZERO_STRUCT(request);
347
348 blob_in = data_blob_const(buf, len);
349
350 ndr_err = ndr_pull_struct_blob(&blob_in, talloc_tos(), &request,
351 (ndr_pull_flags_fn_t)ndr_pull_nbt_netlogon_packet);
352 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
353 DEBUG(1,("process_logon_packet: Failed to pull logon packet\n"));
354 return;
355 }
356
357 if (DEBUGLEVEL >= 10) {
358 NDR_PRINT_DEBUG(nbt_netlogon_packet, &request);
359 }
360
361 DEBUG(4,("process_logon_packet: Logon from %s: code = 0x%x\n",
362 inet_ntoa(p->ip), request.command));
363
364 switch (request.command) {
365 case LOGON_REQUEST: {
366
367 struct nbt_netlogon_response2 response2;
368
369 DEBUG(5,("process_logon_packet: Domain login request from %s at IP %s user=%s token=%x\n",
370 request.req.logon0.computer_name, inet_ntoa(p->ip),
371 request.req.logon0.user_name,
372 request.req.logon0.lm20_token));
373
374 response2.command = LOGON_RESPONSE2;
375 response2.pdc_name = pdc_name;
376 response2.lm20_token = 0xffff;
377
378 response.response_type = NETLOGON_RESPONSE2;
379 response.data.response2 = response2;
380
381 status = push_nbt_netlogon_response(&blob_out, talloc_tos(), &response);
382 if (!NT_STATUS_IS_OK(status)) {
383 DEBUG(0,("process_logon_packet: failed to push packet\n"));
384 return;
385 }
386
387 if (DEBUGLEVEL >= 10) {
388 NDR_PRINT_DEBUG(nbt_netlogon_response2, &response.data.response2);
389 }
390
391 send_mailslot(True, request.req.logon0.mailslot_name,
392 (char *)blob_out.data,
393 blob_out.length,
394 global_myname(), 0x0,
395 source_name,
396 dgram->source_name.name_type,
397 p->ip, ip, p->port);
398 break;
399 }
400
401 case LOGON_PRIMARY_QUERY: {
402
403 struct nbt_netlogon_response_from_pdc get_pdc;
404
405 if (!lp_domain_master()) {
406 /* We're not Primary Domain Controller -- ignore this */
407 return;
408 }
409
410 DEBUG(5,("process_logon_packet: GETDC request from %s at IP %s, "
411 "reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
412 request.req.pdc.computer_name,
413 inet_ntoa(p->ip),
414 global_myname(),
415 lp_workgroup(),
416 NETLOGON_RESPONSE_FROM_PDC,
417 request.req.pdc.nt_version,
418 request.req.pdc.lmnt_token,
419 request.req.pdc.lm20_token));
420
421 get_pdc.command = NETLOGON_RESPONSE_FROM_PDC;
422 get_pdc.pdc_name = global_myname();
423 get_pdc._pad = data_blob_null;
424 get_pdc.unicode_pdc_name = global_myname();
425 get_pdc.domain_name = lp_workgroup();
426 get_pdc.nt_version = NETLOGON_NT_VERSION_1;
427 get_pdc.lmnt_token = 0xffff;
428 get_pdc.lm20_token = 0xffff;
429
430 response.response_type = NETLOGON_GET_PDC;
431 response.data.get_pdc = get_pdc;
432
433 status = push_nbt_netlogon_response(&blob_out, talloc_tos(), &response);
434 if (!NT_STATUS_IS_OK(status)) {
435 DEBUG(0,("process_logon_packet: failed to push packet\n"));
436 return;
437 }
438
439 if (DEBUGLEVEL >= 10) {
440 NDR_PRINT_DEBUG(nbt_netlogon_response_from_pdc, &response.data.get_pdc);
441 }
442
443 send_mailslot(True, request.req.pdc.mailslot_name,
444 (char *)blob_out.data,
445 blob_out.length,
446 global_myname(), 0x0,
447 source_name,
448 dgram->source_name.name_type,
449 p->ip, ip, p->port);
450
451 return;
452 }
453
454 case LOGON_SAM_LOGON_REQUEST: {
455 char *source_addr;
456 bool user_unknown = false;
457
458 struct netlogon_samlogon_response samlogon;
459
460 if (global_nmbd_proxy_logon) {
461 nmbd_proxy_logon(global_nmbd_proxy_logon,
462 ip, p, (uint8_t *)buf, len);
463 return;
464 }
465
466 source_addr = SMB_STRDUP(inet_ntoa(dgram->header.source_ip));
467 if (source_addr == NULL) {
468 DEBUG(3, ("out of memory copying client"
469 " address string\n"));
470 return;
471 }
472
473 DEBUG(5,("process_logon_packet: LOGON_SAM_LOGON_REQUEST request from %s(%s) for %s, returning logon svr %s domain %s code %x token=%x\n",
474 request.req.logon.computer_name,
475 inet_ntoa(p->ip),
476 request.req.logon.user_name,
477 pdc_name,
478 lp_workgroup(),
479 LOGON_SAM_LOGON_RESPONSE,
480 request.req.logon.lmnt_token));
481
482 if (!request.req.logon.user_name) {
483 user_unknown = true;
484 }
485
486 /* we want the simple version unless we are an ADS PDC..which means */
487 /* never, at least for now */
488
489 if ((request.req.logon.nt_version < (NETLOGON_NT_VERSION_1 | NETLOGON_NT_VERSION_5 | NETLOGON_NT_VERSION_5EX_WITH_IP)) ||
490 (SEC_ADS != lp_security()) || (ROLE_DOMAIN_PDC != lp_server_role())) {
491
492 struct NETLOGON_SAM_LOGON_RESPONSE_NT40 nt4;
493
494 nt4.command = user_unknown ? LOGON_SAM_LOGON_USER_UNKNOWN :
495 LOGON_SAM_LOGON_RESPONSE;
496 nt4.pdc_name = pdc_name;
497 nt4.user_name = request.req.logon.user_name;
498 nt4.domain_name = lp_workgroup();
499 nt4.nt_version = NETLOGON_NT_VERSION_1;
500 nt4.lmnt_token = 0xffff;
501 nt4.lm20_token = 0xffff;
502
503 samlogon.ntver = NETLOGON_NT_VERSION_1;
504 samlogon.data.nt4 = nt4;
505
506 if (DEBUGLEVEL >= 10) {
507 NDR_PRINT_DEBUG(NETLOGON_SAM_LOGON_RESPONSE_NT40, &nt4);
508 }
509 }
510#ifdef HAVE_ADS
511 else {
512
513 struct NETLOGON_SAM_LOGON_RESPONSE_EX nt5_ex;
514 struct GUID domain_guid;
515 struct nbt_sockaddr saddr;
516 char *domain;
517 const char *hostname;
518
519 saddr.sockaddr_family = 2; /* AF_INET */
520 saddr.pdc_ip = inet_ntoa(ip);
521 saddr.remaining = data_blob_talloc_zero(talloc_tos(), 8); /* ??? */
522
523 domain = get_mydnsdomname(talloc_tos());
524 if (!domain) {
525 DEBUG(2,("get_mydnsdomname failed.\n"));
526 return;
527 }
528
529 hostname = get_mydnsfullname();
530 if (!hostname) {
531 DEBUG(2,("get_mydnsfullname failed.\n"));
532 return;
533 }
534
535 if (!secrets_fetch_domain_guid(domain, &domain_guid)) {
536 DEBUG(2,("Could not fetch DomainGUID for %s\n", domain));
537 return;
538 }
539
540 nt5_ex.command = user_unknown ? LOGON_SAM_LOGON_USER_UNKNOWN_EX :
541 LOGON_SAM_LOGON_RESPONSE_EX;
542 nt5_ex.sbz = 0;
543 nt5_ex.server_type = NBT_SERVER_PDC |
544 NBT_SERVER_GC |
545 NBT_SERVER_LDAP |
546 NBT_SERVER_DS |
547 NBT_SERVER_KDC |
548 NBT_SERVER_TIMESERV |
549 NBT_SERVER_CLOSEST |
550 NBT_SERVER_WRITABLE;
551 nt5_ex.domain_uuid = domain_guid;
552 nt5_ex.forest = domain;
553 nt5_ex.dns_domain = domain;
554 nt5_ex.pdc_dns_name = hostname;
555 nt5_ex.domain_name = lp_workgroup();
556 nt5_ex.pdc_name = global_myname();
557 nt5_ex.user_name = request.req.logon.user_name;
558 nt5_ex.server_site = "Default-First-Site-Name";
559 nt5_ex.client_site = "Default-First-Site-Name";
560 nt5_ex.sockaddr_size = 0x10; /* the w32 winsock addr size */
561 nt5_ex.sockaddr = saddr;
562 nt5_ex.next_closest_site= NULL;
563 nt5_ex.nt_version = NETLOGON_NT_VERSION_1 |
564 NETLOGON_NT_VERSION_5EX |
565 NETLOGON_NT_VERSION_5EX_WITH_IP;
566 nt5_ex.lmnt_token = 0xffff;
567 nt5_ex.lm20_token = 0xffff;
568
569 samlogon.ntver = NETLOGON_NT_VERSION_1 |
570 NETLOGON_NT_VERSION_5EX |
571 NETLOGON_NT_VERSION_5EX_WITH_IP;
572 samlogon.data.nt5_ex = nt5_ex;
573
574 if (DEBUGLEVEL >= 10) {
575 NDR_PRINT_DEBUG(NETLOGON_SAM_LOGON_RESPONSE_EX, &nt5_ex);
576 }
577 }
578#endif /* HAVE_ADS */
579
580 response.response_type = NETLOGON_SAMLOGON;
581 response.data.samlogon = samlogon;
582
583 status = push_nbt_netlogon_response(&blob_out, talloc_tos(), &response);
584 if (!NT_STATUS_IS_OK(status)) {
585 DEBUG(0,("process_logon_packet: failed to push packet\n"));
586 return;
587 }
588
589 /*
590 * handle delay.
591 * packets requeued after delay are marked as
592 * locked.
593 */
594 if ((p->locked == False) &&
595 (strlen(request.req.logon.user_name) == 0) &&
596 delay_logon(source_name, source_addr))
597 {
598 struct timeval when;
599
600 DEBUG(3, ("process_logon_packet: "
601 "delaying initial logon "
602 "reply for client %s(%s) for "
603 "%u milliseconds\n",
604 source_name, source_addr,
605 lp_init_logon_delay()));
606
607 when = timeval_current_ofs(0,
608 lp_init_logon_delay() * 1000);
609 p->locked = true;
610 event_add_timed(nmbd_event_context(),
611 NULL,
612 when,
613 delayed_init_logon_handler,
614 p);
615 } else {
616 DEBUG(3, ("process_logon_packet: "
617 "processing delayed initial "
618 "logon reply for client "
619 "%s(%s)\n",
620 source_name, source_addr));
621 p->locked = false;
622 send_mailslot(true, request.req.logon.mailslot_name,
623 (char *)blob_out.data,
624 blob_out.length,
625 global_myname(), 0x0,
626 source_name,
627 dgram->source_name.name_type,
628 p->ip, ip, p->port);
629 }
630
631 SAFE_FREE(source_addr);
632
633 break;
634 }
635
636 /* Announce change to UAS or SAM. Send by the domain controller when a
637 replication event is required. */
638
639 case NETLOGON_ANNOUNCE_UAS:
640 DEBUG(5, ("Got NETLOGON_ANNOUNCE_UAS\n"));
641 break;
642
643 default:
644 DEBUG(3,("process_logon_packet: Unknown domain request %d\n",
645 request.command));
646 return;
647 }
648}
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