summaryrefslogtreecommitdiff
path: root/source4/nbt_server/dgram/netlogon.c
blob: c5b16fbd7576b5c72fb1dc5b752518aed2f4cb11 (plain)
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
/* 
   Unix SMB/CIFS implementation.

   NBT datagram netlogon server

   Copyright (C) Andrew Tridgell	2005
   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2008
  
   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 3 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, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "nbt_server/nbt_server.h"
#include "lib/socket/socket.h"
#include "lib/ldb/include/ldb.h"
#include "dsdb/samdb/samdb.h"
#include "auth/auth.h"
#include "../lib/util/util_ldb.h"
#include "param/param.h"
#include "smbd/service_task.h"
#include "cldap_server/cldap_server.h"
#include "libcli/security/security.h"

/*
  reply to a GETDC request
 */
static void nbtd_netlogon_getdc(struct dgram_mailslot_handler *dgmslot, 
				struct nbtd_interface *iface,
				struct nbt_dgram_packet *packet, 
				const struct socket_address *src,
				struct nbt_netlogon_packet *netlogon)
{
	struct nbt_name *name = &packet->data.msg.dest_name;
	struct nbtd_interface *reply_iface = nbtd_find_reply_iface(iface, src->addr, false);
	struct nbt_netlogon_response_from_pdc *pdc;
	const char *ref_attrs[] = {"nETBIOSName", NULL};
	struct ldb_message **ref_res;
	struct ldb_context *samctx;
	struct ldb_dn *partitions_basedn;
	struct nbt_netlogon_response netlogon_response;
	int ret;

	/* only answer getdc requests on the PDC or LOGON names */
	if (name->type != NBT_NAME_PDC && name->type != NBT_NAME_LOGON) {
		return;
	}

	samctx = iface->nbtsrv->sam_ctx;

	if (!samdb_is_pdc(samctx)) {
		DEBUG(2, ("Not a PDC, so not processing LOGON_PRIMARY_QUERY\n"));
		return;		
	}

	partitions_basedn = samdb_partitions_dn(samctx, packet);

	ret = gendb_search(samctx, packet, partitions_basedn, &ref_res, ref_attrs,
			   "(&(&(nETBIOSName=%s)(objectclass=crossRef))(ncName=*))", 
			   name->name);
	
	if (ret != 1) {
		DEBUG(2,("Unable to find domain reference '%s' in sam\n", name->name));
		return;
	}

	/* setup a GETDC reply */
	ZERO_STRUCT(netlogon_response);
	netlogon_response.response_type = NETLOGON_GET_PDC;
	pdc = &netlogon_response.data.get_pdc;

	pdc->command = NETLOGON_RESPONSE_FROM_PDC;
	pdc->pdc_name         = lp_netbios_name(iface->nbtsrv->task->lp_ctx);
	pdc->unicode_pdc_name = pdc->pdc_name;
	pdc->domain_name      = samdb_result_string(ref_res[0], "nETBIOSName", name->name);;
	pdc->nt_version       = 1;
	pdc->lmnt_token       = 0xFFFF;
	pdc->lm20_token       = 0xFFFF;

	dgram_mailslot_netlogon_reply(reply_iface->dgmsock, 
				      packet, 
				      lp_netbios_name(iface->nbtsrv->task->lp_ctx),
				      netlogon->req.pdc.mailslot_name,
				      &netlogon_response);
}


/*
  reply to a ADS style GETDC request
 */
static void nbtd_netlogon_samlogon(struct dgram_mailslot_handler *dgmslot,
				   struct nbtd_interface *iface,
				   struct nbt_dgram_packet *packet, 
				   const struct socket_address *src,
				   struct nbt_netlogon_packet *netlogon)
{
	struct nbt_name *name = &packet->data.msg.dest_name;
	struct nbtd_interface *reply_iface = nbtd_find_reply_iface(iface, src->addr, false);
	struct ldb_context *samctx;
	const char *my_ip = reply_iface->ip_address; 
	struct dom_sid *sid;
	struct nbt_netlogon_response netlogon_response;
	NTSTATUS status;

	if (!my_ip) {
		DEBUG(0, ("Could not obtain own IP address for datagram socket\n"));
		return;
	}

	/* only answer getdc requests on the PDC or LOGON names */
	if (name->type != NBT_NAME_PDC && name->type != NBT_NAME_LOGON) {
		return;
	}

	samctx = iface->nbtsrv->sam_ctx;

	if (netlogon->req.logon.sid_size) {
		sid = &netlogon->req.logon.sid;
	} else {
		sid = NULL;
	}

	status = fill_netlogon_samlogon_response(samctx, packet, NULL, name->name, sid, NULL, 
						 netlogon->req.logon.user_name, netlogon->req.logon.acct_control, src->addr, 
						 netlogon->req.logon.nt_version, iface->nbtsrv->task->lp_ctx, &netlogon_response.data.samlogon);
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(2,("NBT netlogon query failed domain=%s sid=%s version=%d - %s\n",
			 name->name, dom_sid_string(packet, sid), netlogon->req.logon.nt_version, nt_errstr(status)));
		return;
	}

	netlogon_response.response_type = NETLOGON_SAMLOGON;

	packet->data.msg.dest_name.type = 0;

	dgram_mailslot_netlogon_reply(reply_iface->dgmsock, 
				      packet, 
				      lp_netbios_name(iface->nbtsrv->task->lp_ctx),
				      netlogon->req.logon.mailslot_name,
				      &netlogon_response);
}


/*
  handle incoming netlogon mailslot requests
*/
void nbtd_mailslot_netlogon_handler(struct dgram_mailslot_handler *dgmslot, 
				    struct nbt_dgram_packet *packet, 
				    struct socket_address *src)
{
	NTSTATUS status = NT_STATUS_NO_MEMORY;
	struct nbtd_interface *iface = 
		talloc_get_type(dgmslot->private, struct nbtd_interface);
	struct nbt_netlogon_packet *netlogon = 
		talloc(dgmslot, struct nbt_netlogon_packet);
	struct nbtd_iface_name *iname;
	struct nbt_name *name = &packet->data.msg.dest_name;

	if (netlogon == NULL) goto failed;

	/*
	  see if the we are listening on the destination netbios name
	*/
	iname = nbtd_find_iname(iface, name, 0);
	if (iname == NULL) {
		status = NT_STATUS_BAD_NETWORK_NAME;
		goto failed;
	}

	DEBUG(2,("netlogon request to %s from %s:%d\n", 
		 nbt_name_string(netlogon, name), src->addr, src->port));
	status = dgram_mailslot_netlogon_parse_request(dgmslot, netlogon, packet, netlogon);
	if (!NT_STATUS_IS_OK(status)) goto failed;

	switch (netlogon->command) {
	case LOGON_PRIMARY_QUERY:
		nbtd_netlogon_getdc(dgmslot, iface, packet, 
				    src, netlogon);
		break;
	case LOGON_SAM_LOGON_REQUEST:
		nbtd_netlogon_samlogon(dgmslot, iface, packet, 
				       src, netlogon);
		break;
	default:
		DEBUG(2,("unknown netlogon op %d from %s:%d\n", 
			 netlogon->command, src->addr, src->port));
		NDR_PRINT_DEBUG(nbt_netlogon_packet, netlogon);
		break;
	}

	talloc_free(netlogon);
	return;

failed:
	DEBUG(2,("nbtd netlogon handler failed from %s:%d to %s - %s\n",
		 src->addr, src->port, nbt_name_string(netlogon, name),
		 nt_errstr(status)));
	talloc_free(netlogon);
}