summaryrefslogtreecommitdiff
path: root/source4/nbt_server/nbt_server.c
blob: 83a7ae8a2f38cbba5d7d0811b1dfcdfe60ec0cb3 (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
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
/* 
   Unix SMB/CIFS implementation.

   NBT server task

   Copyright (C) Andrew Tridgell	2005
   
   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.
*/

#include "includes.h"
#include "lib/events/events.h"
#include "smbd/service_task.h"
#include "nbt_server/nbt_server.h"


/*
  serve out the nbt statistics
*/
static NTSTATUS nbtd_information(struct irpc_message *msg, 
				 struct nbtd_information *r)
{
	struct nbtd_server *server = talloc_get_type(msg->private, struct nbtd_server);

	switch (r->in.level) {
	case NBTD_INFO_STATISTICS:
		r->out.info.stats = &server->stats;
		break;
	}

	return NT_STATUS_OK;
}

struct getdc_state {
	struct irpc_message *msg;
	struct nbtd_getdcname *req;
};

static void getdc_recv_ntlogon_reply(struct dgram_mailslot_handler *dgmslot, 
				     struct nbt_dgram_packet *packet, 
				     const char *src_address, int src_port)
{
	struct getdc_state *s =
		talloc_get_type(dgmslot->private, struct getdc_state);

	struct nbt_ntlogon_packet ntlogon;
	NTSTATUS status;

	status = dgram_mailslot_ntlogon_parse(dgmslot, packet, packet,
					      &ntlogon);
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(5, ("dgram_mailslot_ntlogon_parse failed: %s\n",
			  nt_errstr(status)));
		goto done;
	}

	status = NT_STATUS_NO_LOGON_SERVERS;

	DEBUG(10, ("reply: command=%d\n", ntlogon.command));

	switch (ntlogon.command) {
	case NTLOGON_SAM_LOGON:
		DEBUG(0, ("Huh -- got NTLOGON_SAM_LOGON as reply\n"));
		break;
	case NTLOGON_SAM_LOGON_REPLY:
		DEBUG(10, ("NTLOGON_SAM_LOGON_REPLY: server: %s, user: %s, "
			   "domain: %s\n", ntlogon.req.reply.server,
			   ntlogon.req.reply.user_name,
			   ntlogon.req.reply.domain));
		s->req->out.dcname =
			talloc_strdup(s->req, ntlogon.req.reply.server);
		if (s->req->out.dcname == NULL) {
			DEBUG(0, ("talloc failed\n"));
			status = NT_STATUS_NO_MEMORY;
			goto done;
		}
		status = NT_STATUS_OK;
		break;
	default:
		DEBUG(0, ("Got unknown packet: %d\n", ntlogon.command));
		break;
	}

 done:
	irpc_send_reply(s->msg, status);
}

static NTSTATUS nbtd_getdcname(struct irpc_message *msg, 
			       struct nbtd_getdcname *req)
{
	struct nbtd_server *server =
		talloc_get_type(msg->private, struct nbtd_server);

	struct getdc_state *s;
	struct nbt_ntlogon_packet p;
	struct nbt_ntlogon_sam_logon *r;
	struct nbt_dgram_socket *sock;
	struct nbt_name src, dst;
	struct dgram_mailslot_handler *handler;
	NTSTATUS status = NT_STATUS_UNSUCCESSFUL;

	DEBUG(0, ("nbtd_getdcname called\n"));

	sock = server->interfaces[0].dgmsock;

	s = talloc(msg, struct getdc_state);
        NT_STATUS_HAVE_NO_MEMORY(s);

	s->msg = msg;
	s->req = req;
	
	handler = dgram_mailslot_temp(sock, NBT_MAILSLOT_GETDC,
				      getdc_recv_ntlogon_reply, s);
        NT_STATUS_HAVE_NO_MEMORY(handler);
	
	ZERO_STRUCT(p);
	p.command = NTLOGON_SAM_LOGON;
	r = &p.req.logon;
	r->request_count = 0;
	r->computer_name = req->in.my_computername;
	r->user_name = req->in.my_accountname;
	r->mailslot_name = handler->mailslot_name;
	r->acct_control = req->in.account_control;
	r->sid = *req->in.domain_sid;
	r->nt_version = 1;
	r->lmnt_token = 0xffff;
	r->lm20_token = 0xffff;

	make_nbt_name_client(&src, req->in.my_computername);
	make_nbt_name(&dst, req->in.domainname, 0x1c);

	status = dgram_mailslot_ntlogon_send(sock, DGRAM_DIRECT_GROUP,
					     &dst, req->in.ip_address, 138,
					     &src, &p);
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(0, ("dgram_mailslot_ntlogon_send failed: %s\n",
			  nt_errstr(status)));
		return status;
	}

	msg->defer_reply = True;
	return NT_STATUS_OK;
}


/*
  startup the nbtd task
*/
static void nbtd_task_init(struct task_server *task)
{
	struct nbtd_server *nbtsrv;
	NTSTATUS status;

	if (iface_count() == 0) {
		task_server_terminate(task, "nbtd: no network interfaces configured");
		return;
	}

	nbtsrv = talloc(task, struct nbtd_server);
	if (nbtsrv == NULL) {
		task_server_terminate(task, "nbtd: out of memory");
		return;
	}

	nbtsrv->task            = task;
	nbtsrv->interfaces      = NULL;
	nbtsrv->bcast_interface = NULL;
	nbtsrv->wins_interface  = NULL;

	/* start listening on the configured network interfaces */
	status = nbtd_startup_interfaces(nbtsrv);
	if (!NT_STATUS_IS_OK(status)) {
		task_server_terminate(task, "nbtd failed to setup interfaces");
		return;
	}

	/* start the WINS server, if appropriate */
	status = nbtd_winsserver_init(nbtsrv);
	if (!NT_STATUS_IS_OK(status)) {
		task_server_terminate(task, "nbtd failed to start WINS server");
		return;
	}

	/* setup monitoring */
	status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_INFORMATION, 
			       nbtd_information, nbtsrv);
	if (!NT_STATUS_IS_OK(status)) {
		task_server_terminate(task, "nbtd failed to setup monitoring");
		return;
	}

	/* Setup handler for getdcname call */
	status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_GETDCNAME,
			       nbtd_getdcname, nbtsrv);
	if (!NT_STATUS_IS_OK(status)) {
		task_server_terminate(task, "nbtd failed to setup getdcname "
				      "handler");
		return;
	}

	/* start the process of registering our names on all interfaces */
	nbtd_register_names(nbtsrv);

	irpc_add_name(task->msg_ctx, "nbt_server");
}


/*
  initialise the nbt server
 */
static NTSTATUS nbtd_init(struct event_context *event_ctx, const struct model_ops *model_ops)
{
	return task_server_startup(event_ctx, model_ops, nbtd_task_init);
}


/*
  register ourselves as a available server
*/
NTSTATUS server_service_nbtd_init(void)
{
	return register_server_service("nbt", nbtd_init);
}