1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
|
/*
Unix SMB/Netbios implementation.
Version 1.9.
NBT netbios routines and daemon - version 2
Copyright (C) Andrew Tridgell 1994-1998
Copyright (C) Luke Kenneth Casson Leighton 1994-1998
Copyright (C) Jeremy Allison 1994-1998
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Revision History:
*/
#include "includes.h"
extern int DEBUGLEVEL;
extern pstring myname;
extern fstring myworkgroup;
/****************************************************************************
Process a domain logon packet
**************************************************************************/
void process_logon_packet(struct packet_struct *p,char *buf,int len,
char *mailslot)
{
struct dgram_packet *dgram = &p->packet.dgram;
pstring my_name;
fstring reply_name;
BOOL add_slashes = False;
pstring outbuf;
int code,reply_code;
char unknown_byte = 0;
uint16 request_count = 0;
uint16 token = 0;
uint32 ntversion;
uint16 lmnttoken;
uint16 lm20token;
uint32 allowableaccount; /* Control bits, i.e. 0x80 == workstation trust a/c. */
uint32 domainsidsize;
uint16 requestcount;
char *domainsid;
char *getdc;
char *uniuser; /* Unicode user name. */
pstring ascuser;
char *unicomp; /* Unicode computer name. */
struct smb_passwd *smb_pass; /* To check if machine account exists */
if (!lp_domain_logons())
{
DEBUG(3,("process_logon_packet: Logon packet received from IP %s and domain \
logons are not enabled.\n", inet_ntoa(p->ip) ));
return;
}
strcpy(my_name, myname);
strupper(my_name);
code = SVAL(buf,0);
DEBUG(1,("process_logon_packet: Logon from %s: code = %x\n", inet_ntoa(p->ip), code));
switch (code)
{
case 0:
{
char *q = buf + 2;
char *machine = q;
char *user = skip_string(machine,1);
getdc = skip_string(user,1);
q = skip_string(getdc,1);
unknown_byte = CVAL(q,0);
request_count = SVAL(q,1);
token = SVAL(q,3);
reply_code = 0x6;
strcpy(reply_name,my_name);
add_slashes = True;
DEBUG(3,("process_logon_packet: Domain login request from %s at IP %s user=%s token=%x\n",
machine,inet_ntoa(p->ip),user,token));
q = outbuf;
SSVAL(q, 0, 6); q += 2;
strcpy(reply_name, "\\\\");
strcat(reply_name, my_name);
strcpy(q, reply_name); q = skip_string(q, 1); /* PDC name */
SSVAL(q, 0, token); q += 2;
dump_data(4, outbuf, PTR_DIFF(q, outbuf));
send_mailslot(True, getdc,
outbuf,PTR_DIFF(q,outbuf),
dgram->dest_name.name,
dgram->dest_name.name_type,
dgram->source_name.name,
dgram->source_name.name_type,
p->ip, *iface_ip(p->ip));
break;
}
case QUERYFORPDC:
{
char *q = buf + 2;
char *machine = q;
getdc = skip_string(machine,1);
unicomp = skip_string(getdc,1);
q = align2(unicomp, buf);
q = skip_unicode_string(q, 1);
ntversion = IVAL(q, 0); q += 4;
lmnttoken = SVAL(q, 0); q += 2;
lm20token = SVAL(q, 0); q += 2;
/* Construct reply. */
q = outbuf;
SSVAL(q, 0, QUERYFORPDC_R); q += 2;
strcpy(reply_name,my_name);
strcpy(q, reply_name); q = skip_string(q, 1); /* PDC name */
if (strcmp(mailslot, NT_LOGON_MAILSLOT)==0) {
q = align2(q, buf);
PutUniCode(q, my_name); /* PDC name */
q = skip_unicode_string(q, 1);
PutUniCode(q, myworkgroup); /* Domain name*/
q = skip_unicode_string(q, 1);
SIVAL(q, 0, ntversion); q += 4;
SSVAL(q, 0, lmnttoken); q += 2;
SSVAL(q, 0, lm20token); q += 2;
}
DEBUG(3,("process_logon_packet: GETDC request from %s at IP %s, \
reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
machine,inet_ntoa(p->ip), reply_name, lp_workgroup(),
QUERYFORPDC_R, (uint32)ntversion, (uint32)lmnttoken,
(uint32)lm20token ));
dump_data(4, outbuf, PTR_DIFF(q, outbuf));
send_mailslot(True, getdc,
outbuf,PTR_DIFF(q,outbuf),
dgram->dest_name.name,
dgram->dest_name.name_type,
dgram->source_name.name,
dgram->source_name.name_type,
p->ip, *iface_ip(p->ip));
return;
}
case SAMLOGON:
{
char *q = buf + 2;
requestcount = SVAL(q, 0); q += 2;
unicomp = q;
uniuser = skip_unicode_string(unicomp,1);
getdc = skip_unicode_string(uniuser,1);
q = skip_string(getdc,1);
allowableaccount = IVAL(q, 0); q += 4;
domainsidsize = IVAL(q, 0); q += 4;
domainsid = q;
q += domainsidsize + 3;
ntversion = IVAL(q, 0); q += 4;
lmnttoken = SVAL(q, 0); q += 2;
lm20token = SVAL(q, 0); q += 2;
DEBUG(3,("process_logon_packet: SAMLOGON sidsize %d ntv %d\n", domainsidsize, ntversion));
/*
* If MACHINE$ is in our password database then respond, else ignore.
* Let's ignore the SID.
*/
pstrcpy(ascuser, unistr(uniuser));
DEBUG(3,("process_logon_packet: SAMLOGON user %s\n", ascuser));
strcpy(reply_name,"\\\\"); /* Here it wants \\LOGONSERVER. */
strcpy(reply_name+2,my_name);
smb_pass = get_smbpwd_entry(ascuser, 0);
if(!smb_pass )
{
DEBUG(3,("process_logon_packet: SAMLOGON request from %s(%s) for %s, not in password file\n",
unistr(unicomp),inet_ntoa(p->ip), ascuser));
return;
}
else if(smb_pass->acct_ctrl & ACB_DISABLED)
{
DEBUG(3,("process_logon_packet: SAMLOGON request from %s(%s) for %s, accound disabled.\n",
unistr(unicomp),inet_ntoa(p->ip), ascuser));
return;
}
else
{
DEBUG(3,("process_logon_packet: SAMLOGON request from %s(%s) for %s, returning logon svr %s domain %s code %x token=%x\n",
unistr(unicomp),inet_ntoa(p->ip), ascuser, reply_name, myworkgroup,
SAMLOGON_R ,lmnttoken));
}
/* Construct reply. */
q = outbuf;
SSVAL(q, 0, SAMLOGON_R); q += 2;
PutUniCode(q, reply_name); q = skip_unicode_string(q, 1);
unistrcpy(q, uniuser); q = skip_unicode_string(q, 1); /* User name (workstation trust account) */
PutUniCode(q, lp_workgroup()); q = skip_unicode_string(q, 1); /* Domain name. */
SIVAL(q, 0, ntversion); q += 4;
SSVAL(q, 0, lmnttoken); q += 2;
SSVAL(q, 0, lm20token); q += 2;
dump_data(4, outbuf, PTR_DIFF(q, outbuf));
send_mailslot(True, getdc,
outbuf,PTR_DIFF(q,outbuf),
dgram->dest_name.name,
dgram->dest_name.name_type,
dgram->source_name.name,
dgram->source_name.name_type,
p->ip, *iface_ip(p->ip));
break;
}
default:
{
DEBUG(3,("process_logon_packet: Unknown domain request %d\n",code));
return;
}
}
}
|
