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
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.
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.
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/>.
28 struct sam_database_info {
30 uint32 serial_lo, serial_hi;
31 uint32 date_lo, date_hi;
34 /****************************************************************************
35 Process a domain logon packet
36 **************************************************************************/
38 void process_logon_packet(struct packet_struct *p, char *buf,int len,
41 struct dgram_packet *dgram = &p->packet.dgram;
51 bool short_request = False;
53 char *uniuser; /* Unicode user name. */
55 char *unicomp; /* Unicode computer name. */
57 struct sockaddr_storage ss;
58 const struct sockaddr_storage *pss;
61 in_addr_to_sockaddr_storage(&ss, p->ip);
64 DEBUG(5,("process_logon_packet:can't find outgoing interface "
65 "for packet from IP %s\n",
69 ip = ((struct sockaddr_in *)pss)->sin_addr;
71 memset(outbuf, 0, sizeof(outbuf));
73 if (!lp_domain_logons()) {
74 DEBUG(5,("process_logon_packet: Logon packet received from IP %s and domain \
75 logons are not enabled.\n", inet_ntoa(p->ip) ));
79 fstrcpy(my_name, global_myname());
81 code = get_safe_SVAL(buf,len,buf,0,-1);
82 DEBUG(4,("process_logon_packet: Logon from %s: code = 0x%x\n", inet_ntoa(p->ip), code));
87 fstring mach_str, user_str, getdc_str;
90 char *user = skip_string(buf,len,machine);
92 if (!user || PTR_DIFF(user, buf) >= len) {
93 DEBUG(0,("process_logon_packet: bad packet\n"));
96 getdc = skip_string(buf,len,user);
98 if (!getdc || PTR_DIFF(getdc, buf) >= len) {
99 DEBUG(0,("process_logon_packet: bad packet\n"));
102 q = skip_string(buf,len,getdc);
104 if (!q || PTR_DIFF(q + 5, buf) > len) {
105 DEBUG(0,("process_logon_packet: bad packet\n"));
110 fstrcpy(reply_name,my_name);
112 pull_ascii_fstring(mach_str, machine);
113 pull_ascii_fstring(user_str, user);
114 pull_ascii_fstring(getdc_str, getdc);
116 DEBUG(5,("process_logon_packet: Domain login request from %s at IP %s user=%s token=%x\n",
117 mach_str,inet_ntoa(p->ip),user_str,token));
123 fstrcpy(reply_name, "\\\\");
124 fstrcat(reply_name, my_name);
125 size = push_ascii(q,reply_name,
126 sizeof(outbuf)-PTR_DIFF(q, outbuf),
128 if (size == (size_t)-1) {
131 q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */
136 dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
138 send_mailslot(True, getdc_str,
139 outbuf,PTR_DIFF(q,outbuf),
140 global_myname(), 0x0,
142 dgram->source_name.name_type,
149 fstring mach_str, getdc_str;
154 if (!lp_domain_master()) {
155 /* We're not Primary Domain Controller -- ignore this */
159 getdc = skip_string(buf,len,machine);
161 if (!getdc || PTR_DIFF(getdc, buf) >= len) {
162 DEBUG(0,("process_logon_packet: bad packet\n"));
165 q = skip_string(buf,len,getdc);
167 if (!q || PTR_DIFF(q, buf) >= len) {
168 DEBUG(0,("process_logon_packet: bad packet\n"));
173 /* At this point we can work out if this is a W9X or NT style
174 request. Experiments show that the difference is wether the
175 packet ends here. For a W9X request we now end with a pair of
176 bytes (usually 0xFE 0xFF) whereas with NT we have two further
177 strings - the following is a simple way of detecting this */
179 if (len - PTR_DIFF(q, buf) <= 3) {
180 short_request = True;
184 if (PTR_DIFF(q, buf) >= len) {
185 DEBUG(0,("process_logon_packet: bad packet\n"));
189 /* A full length (NT style) request */
190 q = skip_unibuf(unicomp, PTR_DIFF(buf + len, unicomp));
192 if (PTR_DIFF(q, buf) >= len) {
193 DEBUG(0,("process_logon_packet: bad packet\n"));
197 if (len - PTR_DIFF(q, buf) > 8) {
198 /* with NT5 clients we can sometimes
199 get additional data - a length specificed string
200 containing the domain name, then 16 bytes of
201 data (no idea what it is) */
202 int dom_len = CVAL(q, 0);
210 if (PTR_DIFF(q + 8, buf) > len) {
211 DEBUG(0,("process_logon_packet: bad packet\n"));
215 ntversion = IVAL(q, 0);
216 lmnttoken = SVAL(q, 4);
217 lm20token = SVAL(q, 6);
220 /* Construct reply. */
222 SSVAL(q, 0, QUERYFORPDC_R);
225 fstrcpy(reply_name,my_name);
226 size = push_ascii(q, reply_name,
227 sizeof(outbuf)-PTR_DIFF(q, outbuf),
229 if (size == (size_t)-1) {
232 q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */
234 /* PDC and domain name */
235 if (!short_request) {
236 /* Make a full reply */
237 q = ALIGN2(q, outbuf);
239 q += dos_PutUniCode(q, my_name,
240 sizeof(outbuf) - PTR_DIFF(q, outbuf),
241 True); /* PDC name */
242 q += dos_PutUniCode(q, lp_workgroup(),
243 sizeof(outbuf) - PTR_DIFF(q, outbuf),
244 True); /* Domain name*/
245 if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
248 SIVAL(q, 0, 1); /* our nt version */
249 SSVAL(q, 4, 0xffff); /* our lmnttoken */
250 SSVAL(q, 6, 0xffff); /* our lm20token */
254 /* RJS, 21-Feb-2000, we send a short reply if the request was short */
256 pull_ascii_fstring(mach_str, machine);
258 DEBUG(5,("process_logon_packet: GETDC request from %s at IP %s, \
259 reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
260 mach_str,inet_ntoa(p->ip), reply_name, lp_workgroup(),
261 QUERYFORPDC_R, (uint32)ntversion, (uint32)lmnttoken,
262 (uint32)lm20token ));
264 dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
266 pull_ascii_fstring(getdc_str, getdc);
267 pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
269 send_mailslot(True, getdc_str,
270 outbuf,PTR_DIFF(q,outbuf),
271 global_myname(), 0x0,
273 dgram->source_name.name_type,
288 if (PTR_DIFF(q, buf) >= len) {
289 DEBUG(0,("process_logon_packet: bad packet\n"));
294 uniuser = skip_unibuf(unicomp, PTR_DIFF(buf+len, unicomp));
296 if (PTR_DIFF(uniuser, buf) >= len) {
297 DEBUG(0,("process_logon_packet: bad packet\n"));
301 getdc = skip_unibuf(uniuser,PTR_DIFF(buf+len, uniuser));
303 if (PTR_DIFF(getdc, buf) >= len) {
304 DEBUG(0,("process_logon_packet: bad packet\n"));
308 q = skip_string(buf,len,getdc);
310 if (!q || PTR_DIFF(q + 8, buf) >= len) {
311 DEBUG(0,("process_logon_packet: bad packet\n"));
315 q += 4; /* Account Control Bits - indicating username type */
316 domainsidsize = IVAL(q, 0);
319 DEBUG(5,("process_logon_packet: SAMLOGON sidsize %d, len = %d\n", domainsidsize, len));
321 if (domainsidsize < (len - PTR_DIFF(q, buf)) && (domainsidsize != 0)) {
326 DEBUG(5,("process_logon_packet: len = %d PTR_DIFF(q, buf) = %ld\n", len, (unsigned long)PTR_DIFF(q, buf) ));
328 if (len - PTR_DIFF(q, buf) > 8) {
329 /* with NT5 clients we can sometimes
330 get additional data - a length specificed string
331 containing the domain name, then 16 bytes of
332 data (no idea what it is) */
333 int dom_len = CVAL(q, 0);
335 if (dom_len < (len - PTR_DIFF(q, buf)) && (dom_len != 0)) {
341 if (PTR_DIFF(q + 8, buf) > len) {
342 DEBUG(0,("process_logon_packet: bad packet\n"));
346 ntversion = IVAL(q, 0);
347 lmnttoken = SVAL(q, 4);
348 lm20token = SVAL(q, 6);
351 DEBUG(3,("process_logon_packet: SAMLOGON sidsize %d ntv %d\n", domainsidsize, ntversion));
354 * we respond regadless of whether the machine is in our password
355 * database. If it isn't then we let smbd send an appropriate error.
356 * Let's ignore the SID.
358 pull_ucs2_fstring(ascuser, uniuser);
359 pull_ucs2_fstring(asccomp, unicomp);
360 DEBUG(5,("process_logon_packet: SAMLOGON user %s\n", ascuser));
362 fstrcpy(reply_name, "\\\\"); /* Here it wants \\LOGONSERVER. */
363 fstrcat(reply_name, my_name);
365 DEBUG(5,("process_logon_packet: SAMLOGON request from %s(%s) for %s, returning logon svr %s domain %s code %x token=%x\n",
366 asccomp,inet_ntoa(p->ip), ascuser, reply_name, lp_workgroup(),
367 SAMLOGON_R ,lmnttoken));
369 /* Construct reply. */
372 /* we want the simple version unless we are an ADS PDC..which means */
373 /* never, at least for now */
374 if ((ntversion < 11) || (SEC_ADS != lp_security()) || (ROLE_DOMAIN_PDC != lp_server_role())) {
375 if (SVAL(uniuser, 0) == 0) {
376 SSVAL(q, 0, SAMLOGON_UNK_R); /* user unknown */
378 SSVAL(q, 0, SAMLOGON_R);
383 q += dos_PutUniCode(q, reply_name,
384 sizeof(outbuf) - PTR_DIFF(q, outbuf),
386 q += dos_PutUniCode(q, ascuser,
387 sizeof(outbuf) - PTR_DIFF(q, outbuf),
389 q += dos_PutUniCode(q, lp_workgroup(),
390 sizeof(outbuf) - PTR_DIFF(q, outbuf),
395 struct GUID domain_guid;
399 char *component, *dc, *q1;
403 domain = get_mydnsdomname(talloc_tos());
406 ("get_mydnsdomname failed.\n"));
409 hostname = get_myname(talloc_tos());
412 ("get_myname failed.\n"));
416 if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
419 if (SVAL(uniuser, 0) == 0) {
420 SIVAL(q, 0, SAMLOGON_AD_UNK_R); /* user unknown */
422 SIVAL(q, 0, SAMLOGON_AD_R);
426 SIVAL(q, 0, ADS_PDC|ADS_GC|ADS_LDAP|ADS_DS|
427 ADS_KDC|ADS_TIMESERV|ADS_CLOSEST|ADS_WRITABLE);
430 /* Push Domain GUID */
431 if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < UUID_FLAT_SIZE) {
434 if (False == secrets_fetch_domain_guid(domain, &domain_guid)) {
435 DEBUG(2, ("Could not fetch DomainGUID for %s\n", domain));
439 smb_uuid_pack(domain_guid, &flat_guid);
440 memcpy(q, &flat_guid.info, UUID_FLAT_SIZE);
444 str_offset = q - q_orig;
447 while ((component = strtok(dc, "."))) {
449 if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 1) {
452 size = push_ascii(&q[1], component,
453 sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
455 if (size == (size_t)-1 || size > 0xff) {
463 if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 4) {
470 SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
471 SCVAL(q, 1, str_offset & 0xFF);
475 size = push_ascii(&q[1], hostname,
476 sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
478 if (size == (size_t)-1 || size > 0xff) {
484 if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 3) {
488 SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
489 SCVAL(q, 1, str_offset & 0xFF);
492 /* NETBIOS of domain */
493 size = push_ascii(&q[1], lp_workgroup(),
494 sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
496 if (size == (size_t)-1 || size > 0xff) {
503 if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 2) {
510 /* NETBIOS of hostname */
511 size = push_ascii(&q[1], my_name,
512 sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
514 if (size == (size_t)-1 || size > 0xff) {
521 if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 4) {
529 if (SVAL(uniuser, 0) != 0) {
530 size = push_ascii(&q[1], ascuser,
531 sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
533 if (size == (size_t)-1 || size > 0xff) {
542 if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 1) {
545 size = push_ascii(&q[1], "Default-First-Site-Name",
546 sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
548 if (size == (size_t)-1 || size > 0xff) {
554 if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 18) {
559 str_offset = q - q_orig;
560 SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
561 SCVAL(q, 1, str_offset & 0xFF);
564 SCVAL(q, 0, PTR_DIFF(q,q1));
565 SCVAL(q, 1, 0x10); /* unknown */
567 SIVAL(q, 0, 0x00000002);
568 q += 4; /* unknown */
569 SIVAL(q, 0, ntohl(ip.s_addr));
571 SIVAL(q, 0, 0x00000000);
572 q += 4; /* unknown */
573 SIVAL(q, 0, 0x00000000);
574 q += 4; /* unknown */
578 if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
582 /* tell the client what version we are */
583 SIVAL(q, 0, ((ntversion < 11) || (SEC_ADS != lp_security())) ? 1 : 13);
585 SSVAL(q, 4, 0xffff); /* our lmnttoken */
586 SSVAL(q, 6, 0xffff); /* our lm20token */
589 dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
591 pull_ascii_fstring(getdc_str, getdc);
592 pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
594 send_mailslot(True, getdc,
595 outbuf,PTR_DIFF(q,outbuf),
596 global_myname(), 0x0,
598 dgram->source_name.name_type,
603 /* Announce change to UAS or SAM. Send by the domain controller when a
604 replication event is required. */
607 DEBUG(5, ("Got SAM_UAS_CHANGE\n"));
611 DEBUG(3,("process_logon_packet: Unknown domain request %d\n",code));