summaryrefslogtreecommitdiff
path: root/source4/cldap_server/cldap_server.c
blob: 09c9889859eb30d39881af6acf4640b9907f5583 (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
236
237
238
/* 
   Unix SMB/CIFS implementation.

   CLDAP 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 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 <talloc.h>
#include "lib/messaging/irpc.h"
#include "smbd/service_task.h"
#include "smbd/service.h"
#include "cldap_server/cldap_server.h"
#include "system/network.h"
#include "lib/socket/netif.h"
#include "lib/ldb/include/ldb.h"
#include "lib/ldb/include/ldb_errors.h"
#include "dsdb/samdb/samdb.h"
#include "ldb_wrap.h"
#include "auth/auth.h"
#include "param/param.h"
#include "../lib/tsocket/tsocket.h"

/*
  handle incoming cldap requests
*/
static void cldapd_request_handler(struct cldap_socket *cldap,
				   void *private_data,
				   struct cldap_incoming *in)
{
	struct cldapd_server *cldapd = talloc_get_type(private_data,
				       struct cldapd_server);
	struct ldap_SearchRequest *search;

	if (in->ldap_msg->type != LDAP_TAG_SearchRequest) {
		DEBUG(0,("Invalid CLDAP request type %d from %s\n",
			 in->ldap_msg->type,
			 tsocket_address_string(in->src, in)));
		cldap_error_reply(cldap, in->ldap_msg->messageid, in->src,
				  LDAP_OPERATIONS_ERROR, "Invalid CLDAP request");
		talloc_free(in);
		return;
	}

	search = &in->ldap_msg->r.SearchRequest;

	if (strcmp("", search->basedn) != 0) {
		DEBUG(0,("Invalid CLDAP basedn '%s' from %s\n",
			 search->basedn,
			 tsocket_address_string(in->src, in)));
		cldap_error_reply(cldap, in->ldap_msg->messageid, in->src,
				  LDAP_OPERATIONS_ERROR, "Invalid CLDAP basedn");
		talloc_free(in);
		return;
	}

	if (search->scope != LDAP_SEARCH_SCOPE_BASE) {
		DEBUG(0,("Invalid CLDAP scope %d from %s\n",
			 search->scope,
			 tsocket_address_string(in->src, in)));
		cldap_error_reply(cldap, in->ldap_msg->messageid, in->src,
				  LDAP_OPERATIONS_ERROR, "Invalid CLDAP scope");
		talloc_free(in);
		return;
	}

	if (search->num_attributes == 1 &&
	    strcasecmp(search->attributes[0], "netlogon") == 0) {
		cldapd_netlogon_request(cldap,
					cldapd,
					in,
					in->ldap_msg->messageid,
					search->tree,
					in->src);
		talloc_free(in);
		return;
	}

	cldapd_rootdse_request(cldap, cldapd, in,
			       in->ldap_msg->messageid,
			       search, in->src);
	talloc_free(in);
}


/*
  start listening on the given address
*/
static NTSTATUS cldapd_add_socket(struct cldapd_server *cldapd, struct loadparm_context *lp_ctx,
				  const char *address)
{
	struct cldap_socket *cldapsock;
	struct tsocket_address *socket_address;
	NTSTATUS status;
	int ret;

	ret = tsocket_address_inet_from_strings(cldapd,
						"ip",
						address,
						lp_cldap_port(lp_ctx),
						&socket_address);
	if (ret != 0) {
		status = map_nt_error_from_unix(errno);
		DEBUG(0,("invalid address %s:%d - %s:%s\n",
			 address, lp_cldap_port(lp_ctx),
			 gai_strerror(ret), nt_errstr(status)));
		return status;
	}

	/* listen for unicasts on the CLDAP port (389) */
	status = cldap_socket_init(cldapd,
				   cldapd->task->event_ctx,
				   socket_address,
				   NULL,
				   &cldapsock);
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(0,("Failed to bind to %s - %s\n", 
			 tsocket_address_string(socket_address, socket_address),
			 nt_errstr(status)));
		talloc_free(socket_address);
		return status;
	}
	talloc_free(socket_address);

	cldap_set_incoming_handler(cldapsock, cldapd_request_handler, cldapd);

	return NT_STATUS_OK;
}

/*
  setup our listening sockets on the configured network interfaces
*/
static NTSTATUS cldapd_startup_interfaces(struct cldapd_server *cldapd, struct loadparm_context *lp_ctx,
					  struct interface *ifaces)
{
	int i, num_interfaces;
	TALLOC_CTX *tmp_ctx = talloc_new(cldapd);
	NTSTATUS status;

	num_interfaces = iface_count(ifaces);

	/* if we are allowing incoming packets from any address, then
	   we need to bind to the wildcard address */
	if (!lp_bind_interfaces_only(lp_ctx)) {
		status = cldapd_add_socket(cldapd, lp_ctx, "0.0.0.0");
		NT_STATUS_NOT_OK_RETURN(status);
	}

	/* now we have to also listen on the specific interfaces,
	   so that replies always come from the right IP */
	for (i=0; i<num_interfaces; i++) {
		const char *address = talloc_strdup(tmp_ctx, iface_n_ip(ifaces, i));
		status = cldapd_add_socket(cldapd, lp_ctx, address);
		NT_STATUS_NOT_OK_RETURN(status);
	}

	talloc_free(tmp_ctx);

	return NT_STATUS_OK;
}

/*
  startup the cldapd task
*/
static void cldapd_task_init(struct task_server *task)
{
	struct cldapd_server *cldapd;
	NTSTATUS status;
	struct interface *ifaces;
	
	load_interfaces(task, lp_interfaces(task->lp_ctx), &ifaces);

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

	switch (lp_server_role(task->lp_ctx)) {
	case ROLE_STANDALONE:
		task_server_terminate(task, "cldap_server: no CLDAP server required in standalone configuration", 
				      false);
		return;
	case ROLE_DOMAIN_MEMBER:
		task_server_terminate(task, "cldap_server: no CLDAP server required in member server configuration",
				      false);
		return;
	case ROLE_DOMAIN_CONTROLLER:
		/* Yes, we want an CLDAP server */
		break;
	}

	task_server_set_title(task, "task[cldapd]");

	cldapd = talloc(task, struct cldapd_server);
	if (cldapd == NULL) {
		task_server_terminate(task, "cldapd: out of memory", true);
		return;
	}

	cldapd->task = task;
	cldapd->samctx = samdb_connect(cldapd, task->event_ctx, task->lp_ctx, system_session(task->lp_ctx));
	if (cldapd->samctx == NULL) {
		task_server_terminate(task, "cldapd failed to open samdb", true);
		return;
	}

	/* start listening on the configured network interfaces */
	status = cldapd_startup_interfaces(cldapd, task->lp_ctx, ifaces);
	if (!NT_STATUS_IS_OK(status)) {
		task_server_terminate(task, "cldapd failed to setup interfaces", true);
		return;
	}

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


/*
  register ourselves as a available server
*/
NTSTATUS server_service_cldapd_init(void)
{
	return register_server_service("cldap", cldapd_task_init);
}