2 Unix SMB/Netbios implementation.
4 NBT netbios routines and daemon - version 2
5 Copyright (C) Andrew Tridgell 1994-1998
6 Copyright (C) Luke Kenneth Casson Leighton 1994-1998
7 Copyright (C) Jeremy Allison 1994-1998
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 2 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, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 extern int DEBUGLEVEL;
31 extern pstring global_myname;
32 extern fstring global_myworkgroup;
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())
61 DEBUG(3,("process_logon_packet: Logon packet received from IP %s and domain \
62 logons are not enabled.\n", inet_ntoa(p->ip) ));
66 pstrcpy(my_name, global_myname);
70 DEBUG(1,("process_logon_packet: Logon from %s: code = %x\n", inet_ntoa(p->ip), code));
78 char *user = skip_string(machine,1);
80 getdc = skip_string(user,1);
81 q = skip_string(getdc,1);
84 fstrcpy(reply_name,my_name);
86 DEBUG(3,("process_logon_packet: Domain login request from %s at IP %s user=%s token=%x\n",
87 machine,inet_ntoa(p->ip),user,token));
93 fstrcpy(reply_name, "\\\\");
94 fstrcat(reply_name, my_name);
95 fstrcpy(q, reply_name); q = skip_string(q, 1); /* PDC name */
100 dump_data(4, outbuf, PTR_DIFF(q, outbuf));
102 send_mailslot(True, getdc,
103 outbuf,PTR_DIFF(q,outbuf),
104 dgram->dest_name.name,
105 dgram->dest_name.name_type,
106 dgram->source_name.name,
107 dgram->source_name.name_type,
108 p->ip, *iface_ip(p->ip), p->port);
117 getdc = skip_string(machine,1);
118 unicomp = skip_string(getdc,1);
120 /* at this point we can work out if this is a W9X or NT style
121 request. Experiments show that the difference is wether the
122 packet ends here. For a W9X request we now end with a pair of
123 bytes (usually 0xFE 0xFF) whereas with NT we have two further
124 strings - the following is a simple way of detecting this */
125 if (len - PTR_DIFF(unicomp, buf) > 3) {
126 short_request = True;
128 /* A full length (NT style) request */
129 q = skip_unicode_string(unicomp, 1);
131 if (len - PTR_DIFF(q, buf) > 8) {
132 /* with NT5 clients we can sometimes
133 get additional data - a length specificed string
134 containing the domain name, then 16 bytes of
135 data (no idea what it is) */
136 int dom_len = CVAL(q, 0);
143 ntversion = IVAL(q, 0);
144 lmnttoken = SVAL(q, 4);
145 lm20token = SVAL(q, 6);
148 /* Construct reply. */
150 SSVAL(q, 0, QUERYFORPDC_R);
153 fstrcpy(reply_name,my_name);
154 fstrcpy(q, reply_name);
155 q = skip_string(q, 1); /* PDC name */
157 /* PDC and domain name */
158 if (!short_request) /* Make a full reply */
162 q += dos_PutUniCode(q, my_name, sizeof(pstring), True); /* PDC name */
163 q += dos_PutUniCode(q, global_myworkgroup,sizeof(pstring), True); /* Domain name*/
165 SIVAL(q, 0, ntversion);
166 SSVAL(q, 4, lmnttoken);
167 SSVAL(q, 6, lm20token);
171 /* RJS, 21-Feb-2000, we send a short reply if the request was short */
173 DEBUG(3,("process_logon_packet: GETDC request from %s at IP %s, \
174 reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
175 machine,inet_ntoa(p->ip), reply_name, lp_workgroup(),
176 QUERYFORPDC_R, (uint32)ntversion, (uint32)lmnttoken,
177 (uint32)lm20token ));
179 dump_data(4, outbuf, PTR_DIFF(q, outbuf));
181 send_mailslot(True, getdc,
182 outbuf,PTR_DIFF(q,outbuf),
183 dgram->dest_name.name,
184 dgram->dest_name.name_type,
185 dgram->source_name.name,
186 dgram->source_name.name_type,
187 p->ip, *iface_ip(p->ip), p->port);
197 uniuser = skip_unicode_string(unicomp,1);
198 getdc = skip_unicode_string(uniuser,1);
199 q = skip_string(getdc,1);
201 domainsidsize = IVAL(q, 0);
203 q += domainsidsize + 3;
204 ntversion = IVAL(q, 0);
206 lmnttoken = SVAL(q, 0);
208 lm20token = SVAL(q, 0);
211 DEBUG(3,("process_logon_packet: SAMLOGON sidsize %d ntv %d\n", domainsidsize, ntversion));
214 * we respond regadless of whether the machine is in our password
215 * database. If it isn't then we let smbd send an appropriate error.
216 * Let's ignore the SID.
219 pstrcpy(ascuser, dos_unistr(uniuser));
220 DEBUG(3,("process_logon_packet: SAMLOGON user %s\n", ascuser));
222 fstrcpy(reply_name,"\\\\"); /* Here it wants \\LOGONSERVER. */
223 fstrcpy(reply_name+2,my_name);
225 DEBUG(3,("process_logon_packet: SAMLOGON request from %s(%s) for %s, returning logon svr %s domain %s code %x token=%x\n",
226 dos_unistr(unicomp),inet_ntoa(p->ip), ascuser, reply_name, global_myworkgroup,
227 SAMLOGON_R ,lmnttoken));
229 /* Construct reply. */
232 if (SVAL(uniuser, 0) == 0) {
233 SSVAL(q, 0, SAMLOGON_UNK_R); /* user unknown */
235 SSVAL(q, 0, SAMLOGON_R);
239 q += dos_PutUniCode(q, reply_name,sizeof(pstring), True);
240 unistrcpy(q, uniuser);
241 q = skip_unicode_string(q, 1); /* User name (workstation trust account) */
242 q += dos_PutUniCode(q, lp_workgroup(),sizeof(pstring), True);
244 SIVAL(q, 0, ntversion);
246 SSVAL(q, 0, lmnttoken);
248 SSVAL(q, 0, lm20token);
251 dump_data(4, outbuf, PTR_DIFF(q, outbuf));
253 send_mailslot(True, getdc,
254 outbuf,PTR_DIFF(q,outbuf),
255 dgram->dest_name.name,
256 dgram->dest_name.name_type,
257 dgram->source_name.name,
258 dgram->source_name.name_type,
259 p->ip, *iface_ip(p->ip), p->port);
265 DEBUG(3,("process_logon_packet: Unknown domain request %d\n",code));