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 memset(outbuf, 0, sizeof(outbuf));
59 if (!lp_domain_logons()) {
60 DEBUG(5,("process_logon_packet: Logon packet received from IP %s and domain \
61 logons are not enabled.\n", inet_ntoa(p->ip) ));
65 pstrcpy(my_name, global_myname());
67 code = get_safe_SVAL(buf,len,buf,0,-1);
68 DEBUG(4,("process_logon_packet: Logon from %s: code = 0x%x\n", inet_ntoa(p->ip), code));
73 fstring mach_str, user_str, getdc_str;
76 char *user = skip_string(buf,len,machine);
78 if (!user || PTR_DIFF(user, buf) >= len) {
79 DEBUG(0,("process_logon_packet: bad packet\n"));
82 getdc = skip_string(buf,len,user);
84 if (!getdc || PTR_DIFF(getdc, buf) >= len) {
85 DEBUG(0,("process_logon_packet: bad packet\n"));
88 q = skip_string(buf,len,getdc);
90 if (!q || PTR_DIFF(q + 5, buf) > len) {
91 DEBUG(0,("process_logon_packet: bad packet\n"));
96 fstrcpy(reply_name,my_name);
98 pull_ascii_fstring(mach_str, machine);
99 pull_ascii_fstring(user_str, user);
100 pull_ascii_fstring(getdc_str, getdc);
102 DEBUG(5,("process_logon_packet: Domain login request from %s at IP %s user=%s token=%x\n",
103 mach_str,inet_ntoa(p->ip),user_str,token));
109 fstrcpy(reply_name, "\\\\");
110 fstrcat(reply_name, my_name);
111 push_ascii_fstring(q, reply_name);
112 q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */
117 dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
119 send_mailslot(True, getdc_str,
120 outbuf,PTR_DIFF(q,outbuf),
121 global_myname(), 0x0,
123 dgram->source_name.name_type,
124 p->ip, *iface_ip(p->ip), p->port);
130 fstring mach_str, getdc_str;
135 if (!lp_domain_master()) {
136 /* We're not Primary Domain Controller -- ignore this */
140 getdc = skip_string(buf,len,machine);
142 if (!getdc || PTR_DIFF(getdc, buf) >= len) {
143 DEBUG(0,("process_logon_packet: bad packet\n"));
146 q = skip_string(buf,len,getdc);
148 if (!q || PTR_DIFF(q, buf) >= len) {
149 DEBUG(0,("process_logon_packet: bad packet\n"));
154 /* At this point we can work out if this is a W9X or NT style
155 request. Experiments show that the difference is wether the
156 packet ends here. For a W9X request we now end with a pair of
157 bytes (usually 0xFE 0xFF) whereas with NT we have two further
158 strings - the following is a simple way of detecting this */
160 if (len - PTR_DIFF(q, buf) <= 3) {
161 short_request = True;
165 if (PTR_DIFF(q, buf) >= len) {
166 DEBUG(0,("process_logon_packet: bad packet\n"));
170 /* A full length (NT style) request */
171 q = skip_unibuf(unicomp, PTR_DIFF(buf + len, unicomp));
173 if (PTR_DIFF(q, buf) >= len) {
174 DEBUG(0,("process_logon_packet: bad packet\n"));
178 if (len - PTR_DIFF(q, buf) > 8) {
179 /* with NT5 clients we can sometimes
180 get additional data - a length specificed string
181 containing the domain name, then 16 bytes of
182 data (no idea what it is) */
183 int dom_len = CVAL(q, 0);
191 if (PTR_DIFF(q + 8, buf) > len) {
192 DEBUG(0,("process_logon_packet: bad packet\n"));
196 ntversion = IVAL(q, 0);
197 lmnttoken = SVAL(q, 4);
198 lm20token = SVAL(q, 6);
201 /* Construct reply. */
203 SSVAL(q, 0, QUERYFORPDC_R);
206 fstrcpy(reply_name,my_name);
207 push_ascii_fstring(q, reply_name);
208 q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */
210 /* PDC and domain name */
211 if (!short_request) {
212 /* Make a full reply */
213 q = ALIGN2(q, outbuf);
215 q += dos_PutUniCode(q, my_name, sizeof(pstring), True); /* PDC name */
216 q += dos_PutUniCode(q, lp_workgroup(),sizeof(pstring), True); /* Domain name*/
217 SIVAL(q, 0, 1); /* our nt version */
218 SSVAL(q, 4, 0xffff); /* our lmnttoken */
219 SSVAL(q, 6, 0xffff); /* our lm20token */
223 /* RJS, 21-Feb-2000, we send a short reply if the request was short */
225 pull_ascii_fstring(mach_str, machine);
227 DEBUG(5,("process_logon_packet: GETDC request from %s at IP %s, \
228 reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
229 mach_str,inet_ntoa(p->ip), reply_name, lp_workgroup(),
230 QUERYFORPDC_R, (uint32)ntversion, (uint32)lmnttoken,
231 (uint32)lm20token ));
233 dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
235 pull_ascii_fstring(getdc_str, getdc);
236 pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
238 send_mailslot(True, getdc_str,
239 outbuf,PTR_DIFF(q,outbuf),
240 global_myname(), 0x0,
242 dgram->source_name.name_type,
243 p->ip, *iface_ip(p->ip), p->port);
257 if (PTR_DIFF(q, buf) >= len) {
258 DEBUG(0,("process_logon_packet: bad packet\n"));
263 uniuser = skip_unibuf(unicomp, PTR_DIFF(buf+len, unicomp));
265 if (PTR_DIFF(uniuser, buf) >= len) {
266 DEBUG(0,("process_logon_packet: bad packet\n"));
270 getdc = skip_unibuf(uniuser,PTR_DIFF(buf+len, uniuser));
272 if (PTR_DIFF(getdc, buf) >= len) {
273 DEBUG(0,("process_logon_packet: bad packet\n"));
277 q = skip_string(buf,len,getdc);
279 if (!q || PTR_DIFF(q + 8, buf) >= len) {
280 DEBUG(0,("process_logon_packet: bad packet\n"));
284 q += 4; /* Account Control Bits - indicating username type */
285 domainsidsize = IVAL(q, 0);
288 DEBUG(5,("process_logon_packet: SAMLOGON sidsize %d, len = %d\n", domainsidsize, len));
290 if (domainsidsize < (len - PTR_DIFF(q, buf)) && (domainsidsize != 0)) {
295 DEBUG(5,("process_logon_packet: len = %d PTR_DIFF(q, buf) = %ld\n", len, (unsigned long)PTR_DIFF(q, buf) ));
297 if (len - PTR_DIFF(q, buf) > 8) {
298 /* with NT5 clients we can sometimes
299 get additional data - a length specificed string
300 containing the domain name, then 16 bytes of
301 data (no idea what it is) */
302 int dom_len = CVAL(q, 0);
304 if (dom_len < (len - PTR_DIFF(q, buf)) && (dom_len != 0)) {
310 if (PTR_DIFF(q + 8, buf) > len) {
311 DEBUG(0,("process_logon_packet: bad packet\n"));
315 ntversion = IVAL(q, 0);
316 lmnttoken = SVAL(q, 4);
317 lm20token = SVAL(q, 6);
320 DEBUG(3,("process_logon_packet: SAMLOGON sidsize %d ntv %d\n", domainsidsize, ntversion));
323 * we respond regadless of whether the machine is in our password
324 * database. If it isn't then we let smbd send an appropriate error.
325 * Let's ignore the SID.
327 pull_ucs2_pstring(ascuser, uniuser);
328 pull_ucs2_fstring(asccomp, unicomp);
329 DEBUG(5,("process_logon_packet: SAMLOGON user %s\n", ascuser));
331 fstrcpy(reply_name, "\\\\"); /* Here it wants \\LOGONSERVER. */
332 fstrcat(reply_name, my_name);
334 DEBUG(5,("process_logon_packet: SAMLOGON request from %s(%s) for %s, returning logon svr %s domain %s code %x token=%x\n",
335 asccomp,inet_ntoa(p->ip), ascuser, reply_name, lp_workgroup(),
336 SAMLOGON_R ,lmnttoken));
338 /* Construct reply. */
341 /* we want the simple version unless we are an ADS PDC..which means */
342 /* never, at least for now */
343 if ((ntversion < 11) || (SEC_ADS != lp_security()) || (ROLE_DOMAIN_PDC != lp_server_role())) {
344 if (SVAL(uniuser, 0) == 0) {
345 SSVAL(q, 0, SAMLOGON_UNK_R); /* user unknown */
347 SSVAL(q, 0, SAMLOGON_R);
352 q += dos_PutUniCode(q, reply_name,sizeof(pstring), True);
353 q += dos_PutUniCode(q, ascuser, sizeof(pstring), True);
354 q += dos_PutUniCode(q, lp_workgroup(),sizeof(pstring), True);
358 struct GUID domain_guid;
362 char *component, *dc, *q1;
367 get_mydnsdomname(domain);
368 get_myname(hostname);
370 if (SVAL(uniuser, 0) == 0) {
371 SIVAL(q, 0, SAMLOGON_AD_UNK_R); /* user unknown */
373 SIVAL(q, 0, SAMLOGON_AD_R);
377 SIVAL(q, 0, ADS_PDC|ADS_GC|ADS_LDAP|ADS_DS|
378 ADS_KDC|ADS_TIMESERV|ADS_CLOSEST|ADS_WRITABLE);
381 /* Push Domain GUID */
382 if (False == secrets_fetch_domain_guid(domain, &domain_guid)) {
383 DEBUG(2, ("Could not fetch DomainGUID for %s\n", domain));
387 smb_uuid_pack(domain_guid, &flat_guid);
388 memcpy(q, &flat_guid.info, UUID_FLAT_SIZE);
392 str_offset = q - q_orig;
395 while ((component = strtok(dc, "."))) {
397 size = push_ascii(&q[1], component, -1, 0);
407 SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
408 SCVAL(q, 1, str_offset & 0xFF);
412 size = push_ascii(&q[1], hostname, -1, 0);
415 SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
416 SCVAL(q, 1, str_offset & 0xFF);
419 /* NETBIOS of domain */
420 size = push_ascii(&q[1], lp_workgroup(), -1, STR_UPPER);
428 /* NETBIOS of hostname */
429 size = push_ascii(&q[1], my_name, -1, 0);
438 if (SVAL(uniuser, 0) != 0) {
439 size = push_ascii(&q[1], ascuser, -1, 0);
446 size = push_ascii(&q[1], "Default-First-Site-Name", -1, 0);
451 str_offset = q - q_orig;
452 SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
453 SCVAL(q, 1, str_offset & 0xFF);
456 SCVAL(q, 0, PTR_DIFF(q,q1));
457 SCVAL(q, 1, 0x10); /* unknown */
459 SIVAL(q, 0, 0x00000002);
460 q += 4; /* unknown */
461 SIVAL(q, 0, (iface_ip(p->ip))->s_addr);
463 SIVAL(q, 0, 0x00000000);
464 q += 4; /* unknown */
465 SIVAL(q, 0, 0x00000000);
466 q += 4; /* unknown */
470 /* tell the client what version we are */
471 SIVAL(q, 0, ((ntversion < 11) || (SEC_ADS != lp_security())) ? 1 : 13);
473 SSVAL(q, 4, 0xffff); /* our lmnttoken */
474 SSVAL(q, 6, 0xffff); /* our lm20token */
477 dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
479 pull_ascii_fstring(getdc_str, getdc);
480 pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
482 send_mailslot(True, getdc,
483 outbuf,PTR_DIFF(q,outbuf),
484 global_myname(), 0x0,
486 dgram->source_name.name_type,
487 p->ip, *iface_ip(p->ip), p->port);
491 /* Announce change to UAS or SAM. Send by the domain controller when a
492 replication event is required. */
495 DEBUG(5, ("Got SAM_UAS_CHANGE\n"));
499 DEBUG(3,("process_logon_packet: Unknown domain request %d\n",code));