summaryrefslogtreecommitdiffstats
path: root/source4/nbt_server/irpc.c
blob: e835ffd25ab22cb1406b062e0d6582d55ff7c4ee (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
/* 
   Unix SMB/CIFS implementation.

   irpc services for the NBT server

   Copyright (C) Andrew Tridgell	2005
   Copyright (C) Volker Lendecke	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 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 "samba/service_task.h"
#include "samba/service.h"
#include "nbt_server/nbt_server.h"
#include "nbt_server/wins/winsserver.h"
#include "librpc/gen_ndr/ndr_irpc.h"
#include "lib/socket/socket.h"
#include "libcli/resolve/resolve.h"
#include "librpc/gen_ndr/ndr_nbt.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_data,
						     struct nbtd_server);

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

	return NT_STATUS_OK;
}


/*
  winbind needs to be able to do a getdc request, but most (all?) windows
  servers always send the reply to port 138, regardless of the request
  port. To cope with this we use a irpc request to the NBT server
  which has port 138 open, and thus can receive the replies
*/
struct getdc_state {
	struct irpc_message *msg;
	struct nbtd_getdcname *req;
};

static void getdc_recv_netlogon_reply(struct dgram_mailslot_handler *dgmslot, 
				      struct nbt_dgram_packet *packet, 
				      struct socket_address *src)
{
	struct getdc_state *s =
		talloc_get_type(dgmslot->private_data, struct getdc_state);
	const char *p;
	struct nbt_netlogon_response netlogon;
	NTSTATUS status;

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

	/* We asked for version 1 only */
	if (netlogon.response_type == NETLOGON_SAMLOGON
	    && netlogon.data.samlogon.ntver != NETLOGON_NT_VERSION_1) {
		status = NT_STATUS_INVALID_NETWORK_RESPONSE;
		goto done;
	}

	p = netlogon.data.samlogon.data.nt4.pdc_name;

	DEBUG(10, ("NTLOGON_SAM_LOGON_REPLY: server: %s, user: %s, "
		   "domain: %s\n", p,
		   netlogon.data.samlogon.data.nt4.user_name,
		   netlogon.data.samlogon.data.nt4.domain_name));

	if (*p == '\\') p += 1;
	if (*p == '\\') p += 1;
	
	s->req->out.dcname = talloc_strdup(s->req, p);
	if (s->req->out.dcname == NULL) {
		DEBUG(0, ("talloc failed\n"));
		status = NT_STATUS_NO_MEMORY;
		goto done;
	}

	status = NT_STATUS_OK;

 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_data, struct nbtd_server);
	struct nbtd_interface *iface = nbtd_find_request_iface(server, req->in.ip_address, true);
	struct getdc_state *s;
	struct nbt_netlogon_packet p;
	struct NETLOGON_SAM_LOGON_REQUEST *r;
	struct nbt_name src, dst;
	struct socket_address *dest;
	struct dgram_mailslot_handler *handler;
	NTSTATUS status = NT_STATUS_UNSUCCESSFUL;

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

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

	s->msg = msg;
	s->req = req;
	
	handler = dgram_mailslot_temp(iface->dgmsock, NBT_MAILSLOT_GETDC,
				      getdc_recv_netlogon_reply, s);
        NT_STATUS_HAVE_NO_MEMORY(handler);
	
	ZERO_STRUCT(p);
	p.command = LOGON_SAM_LOGON_REQUEST;
	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 = NETLOGON_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);

	dest = socket_address_from_strings(msg, iface->dgmsock->sock->backend_name, 
					   req->in.ip_address, 138);
	NT_STATUS_HAVE_NO_MEMORY(dest);

	status = dgram_mailslot_netlogon_send(iface->dgmsock, 
					      &dst, dest,
					      NBT_MAILSLOT_NETLOGON, 
					      &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;
}


/*
  register the irpc handlers for the nbt server
*/
void nbtd_register_irpc(struct nbtd_server *nbtsrv)
{
	NTSTATUS status;
	struct task_server *task = nbtsrv->task;

	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", true);
		return;
	}

	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", true);
		return;
	}

	status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_PROXY_WINS_CHALLENGE,
			       nbtd_proxy_wins_challenge, nbtsrv);
	if (!NT_STATUS_IS_OK(status)) {
		task_server_terminate(task, "nbtd failed to setup wins challenge "
				      "handler", true);
		return;
	}

	status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_PROXY_WINS_RELEASE_DEMAND,
			       nbtd_proxy_wins_release_demand, nbtsrv);
	if (!NT_STATUS_IS_OK(status)) {
		task_server_terminate(task, "nbtd failed to setup wins release demand "
				      "handler", true);
		return;
	}
}