2 Unix SMB/CIFS implementation.
6 Copyright (C) Andrew Tridgell 2005
7 Copyright (C) Volker Lendecke 2004
8 Copyright (C) Stefan Metzmacher 2004
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "lib/events/events.h"
26 #include "auth/auth.h"
27 #include "auth/credentials/credentials.h"
28 #include "librpc/gen_ndr/ndr_samr.h"
29 #include "lib/util/dlinklist.h"
30 #include "libcli/util/asn_1.h"
31 #include "ldap_server/ldap_server.h"
32 #include "smbd/service_task.h"
33 #include "smbd/service_stream.h"
34 #include "smbd/service.h"
35 #include "smbd/process_model.h"
36 #include "lib/tls/tls.h"
37 #include "lib/messaging/irpc.h"
38 #include "lib/ldb/include/ldb.h"
39 #include "lib/ldb/include/ldb_errors.h"
40 #include "system/network.h"
41 #include "lib/socket/netif.h"
42 #include "dsdb/samdb/samdb.h"
44 close the socket and shutdown a server_context
46 void ldapsrv_terminate_connection(struct ldapsrv_connection *conn,
49 stream_terminate_connection(conn->connection, reason);
55 static void ldapsrv_error_handler(void *private, NTSTATUS status)
57 struct ldapsrv_connection *conn = talloc_get_type(private,
58 struct ldapsrv_connection);
59 ldapsrv_terminate_connection(conn, nt_errstr(status));
63 process a decoded ldap message
65 static void ldapsrv_process_message(struct ldapsrv_connection *conn,
66 struct ldap_message *msg)
68 struct ldapsrv_call *call;
72 call = talloc(conn, struct ldapsrv_call);
74 ldapsrv_terminate_connection(conn, "no memory");
78 call->request = talloc_steal(call, msg);
81 call->send_callback = NULL;
82 call->send_private = NULL;
85 status = ldapsrv_do_call(call);
86 if (!NT_STATUS_IS_OK(status)) {
91 blob = data_blob(NULL, 0);
93 if (call->replies == NULL) {
98 /* build all the replies into a single blob */
99 while (call->replies) {
102 msg = call->replies->msg;
103 if (!ldap_encode(msg, &b, call)) {
104 DEBUG(0,("Failed to encode ldap reply of type %d\n", msg->type));
109 status = data_blob_append(call, &blob, b.data, b.length);
112 talloc_set_name_const(blob.data, "Outgoing, encoded LDAP packet");
114 if (!NT_STATUS_IS_OK(status)) {
119 DLIST_REMOVE(call->replies, call->replies);
122 packet_send_callback(conn->packet, blob,
123 call->send_callback, call->send_private);
131 static NTSTATUS ldapsrv_decode(void *private, DATA_BLOB blob)
134 struct ldapsrv_connection *conn = talloc_get_type(private,
135 struct ldapsrv_connection);
136 struct asn1_data *asn1 = asn1_init(conn);
137 struct ldap_message *msg = talloc(conn, struct ldap_message);
139 if (asn1 == NULL || msg == NULL) {
140 return NT_STATUS_NO_MEMORY;
143 if (!asn1_load(asn1, blob)) {
146 return NT_STATUS_NO_MEMORY;
149 status = ldap_decode(asn1, msg);
150 if (!NT_STATUS_IS_OK(status)) {
155 data_blob_free(&blob);
156 ldapsrv_process_message(conn, msg);
164 static void ldapsrv_conn_idle_timeout(struct event_context *ev,
165 struct timed_event *te,
169 struct ldapsrv_connection *conn = talloc_get_type(private, struct ldapsrv_connection);
171 ldapsrv_terminate_connection(conn, "Timeout. No requests after bind");
175 called when a LDAP socket becomes readable
177 void ldapsrv_recv(struct stream_connection *c, uint16_t flags)
179 struct ldapsrv_connection *conn =
180 talloc_get_type(c->private, struct ldapsrv_connection);
182 if (conn->limits.ite) { /* clean initial timeout if any */
183 talloc_free(conn->limits.ite);
184 conn->limits.ite = NULL;
187 if (conn->limits.te) { /* clean idle timeout if any */
188 talloc_free(conn->limits.te);
189 conn->limits.te = NULL;
192 packet_recv(conn->packet);
194 /* set idle timeout */
195 conn->limits.te = event_add_timed(c->event.ctx, conn,
196 timeval_current_ofs(conn->limits.conn_idle_time, 0),
197 ldapsrv_conn_idle_timeout, conn);
201 called when a LDAP socket becomes writable
203 static void ldapsrv_send(struct stream_connection *c, uint16_t flags)
205 struct ldapsrv_connection *conn =
206 talloc_get_type(c->private, struct ldapsrv_connection);
208 packet_queue_run(conn->packet);
211 static void ldapsrv_conn_init_timeout(struct event_context *ev,
212 struct timed_event *te,
216 struct ldapsrv_connection *conn = talloc_get_type(private, struct ldapsrv_connection);
218 ldapsrv_terminate_connection(conn, "Timeout. No requests after initial connection");
221 static int ldapsrv_load_limits(struct ldapsrv_connection *conn)
224 const char *attrs[] = { "configurationNamingContext", NULL };
225 const char *attrs2[] = { "lDAPAdminLimits", NULL };
226 struct ldb_message_element *el;
227 struct ldb_result *res = NULL;
228 struct ldb_dn *basedn;
229 struct ldb_dn *conf_dn;
230 struct ldb_dn *policy_dn;
233 /* set defaults limits in case of failure */
234 conn->limits.initial_timeout = 120;
235 conn->limits.conn_idle_time = 900;
236 conn->limits.max_page_size = 1000;
237 conn->limits.search_timeout = 120;
240 tmp_ctx = talloc_new(conn);
241 if (tmp_ctx == NULL) {
245 basedn = ldb_dn_new(tmp_ctx, conn->ldb, NULL);
246 if ( ! ldb_dn_validate(basedn)) {
250 ret = ldb_search(conn->ldb, basedn, LDB_SCOPE_BASE, NULL, attrs, &res);
251 if (ret != LDB_SUCCESS) {
255 talloc_steal(tmp_ctx, res);
257 if (res->count != 1) {
261 conf_dn = ldb_msg_find_attr_as_dn(conn->ldb, tmp_ctx, res->msgs[0], "configurationNamingContext");
262 if (conf_dn == NULL) {
266 policy_dn = ldb_dn_copy(tmp_ctx, conf_dn);
267 ldb_dn_add_child_fmt(policy_dn, "CN=Default Query Policy,CN=Query-Policies,CN=Directory Service,CN=Windows NT,CN=Services");
268 if (policy_dn == NULL) {
272 ret = ldb_search(conn->ldb, policy_dn, LDB_SCOPE_BASE, NULL, attrs2, &res);
273 if (ret != LDB_SUCCESS) {
277 talloc_steal(tmp_ctx, res);
279 if (res->count != 1) {
283 el = ldb_msg_find_element(res->msgs[0], "lDAPAdminLimits");
288 for (i = 0; i < el->num_values; i++) {
289 char policy_name[256];
292 s = sscanf((const char *)el->values[i].data, "%255[^=]=%d", policy_name, &policy_value);
293 if (ret != 2 || policy_value == 0)
296 if (strcasecmp("InitRecvTimeout", policy_name) == 0) {
297 conn->limits.initial_timeout = policy_value;
300 if (strcasecmp("MaxConnIdleTime", policy_name) == 0) {
301 conn->limits.conn_idle_time = policy_value;
304 if (strcasecmp("MaxPageSize", policy_name) == 0) {
305 conn->limits.max_page_size = policy_value;
308 if (strcasecmp("MaxQueryDuration", policy_name) == 0) {
309 conn->limits.search_timeout = policy_value;
317 DEBUG(0, ("Failed to load ldap server query policies\n"));
318 talloc_free(tmp_ctx);
323 initialise a server_context from a open socket and register a event handler
324 for reading from that socket
326 static void ldapsrv_accept(struct stream_connection *c)
328 struct ldapsrv_service *ldapsrv_service =
329 talloc_get_type(c->private, struct ldapsrv_service);
330 struct ldapsrv_connection *conn;
331 struct cli_credentials *server_credentials;
332 struct socket_address *socket_address;
336 conn = talloc_zero(c, struct ldapsrv_connection);
338 stream_terminate_connection(c, "ldapsrv_accept: out of memory");
343 conn->connection = c;
344 conn->service = ldapsrv_service;
345 conn->sockets.raw = c->socket;
349 socket_address = socket_get_my_addr(c->socket, conn);
350 if (!socket_address) {
351 ldapsrv_terminate_connection(conn, "ldapsrv_accept: failed to obtain local socket address!");
354 port = socket_address->port;
355 talloc_free(socket_address);
358 struct socket_context *tls_socket = tls_init_server(ldapsrv_service->tls_params, c->socket,
361 ldapsrv_terminate_connection(conn, "ldapsrv_accept: tls_init_server() failed");
364 talloc_unlink(c, c->socket);
365 talloc_steal(c, tls_socket);
366 c->socket = tls_socket;
367 conn->sockets.tls = tls_socket;
369 } else if (port == 3268) /* Global catalog */ {
370 conn->global_catalog = True;
372 conn->packet = packet_init(conn);
373 if (conn->packet == NULL) {
374 ldapsrv_terminate_connection(conn, "out of memory");
378 packet_set_private(conn->packet, conn);
379 packet_set_socket(conn->packet, c->socket);
380 packet_set_callback(conn->packet, ldapsrv_decode);
381 packet_set_full_request(conn->packet, ldap_full_packet);
382 packet_set_error_handler(conn->packet, ldapsrv_error_handler);
383 packet_set_event_context(conn->packet, c->event.ctx);
384 packet_set_fde(conn->packet, c->event.fde);
385 packet_set_serialise(conn->packet);
387 /* Ensure we don't get packets until the database is ready below */
388 packet_recv_disable(conn->packet);
391 = cli_credentials_init(conn);
392 if (!server_credentials) {
393 stream_terminate_connection(c, "Failed to init server credentials\n");
397 cli_credentials_set_conf(server_credentials);
398 status = cli_credentials_set_machine_account(server_credentials);
399 if (!NT_STATUS_IS_OK(status)) {
400 stream_terminate_connection(c, talloc_asprintf(conn, "Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(status)));
403 conn->server_credentials = server_credentials;
405 /* Connections start out anonymous */
406 if (!NT_STATUS_IS_OK(auth_anonymous_session_info(conn, &conn->session_info))) {
407 ldapsrv_terminate_connection(conn, "failed to setup anonymous session info");
411 if (!NT_STATUS_IS_OK(ldapsrv_backend_Init(conn))) {
412 ldapsrv_terminate_connection(conn, "backend Init failed");
416 /* load limits from the conf partition */
417 ldapsrv_load_limits(conn); /* should we fail on error ? */
419 /* register the server */
420 irpc_add_name(c->msg_ctx, "ldap_server");
422 /* set connections limits */
423 conn->limits.ite = event_add_timed(c->event.ctx, conn,
424 timeval_current_ofs(conn->limits.initial_timeout, 0),
425 ldapsrv_conn_init_timeout, conn);
427 packet_recv_enable(conn->packet);
431 static const struct stream_server_ops ldap_stream_ops = {
433 .accept_connection = ldapsrv_accept,
434 .recv_handler = ldapsrv_recv,
435 .send_handler = ldapsrv_send,
439 add a socket address to the list of events, one event per port
441 static NTSTATUS add_socket(struct event_context *event_context,
442 const struct model_ops *model_ops,
443 const char *address, struct ldapsrv_service *ldap_service)
447 const char *attrs[] = { "options", NULL };
449 struct ldb_result *res;
450 struct ldb_context *ldb;
453 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
454 "ipv4", address, &port, ldap_service);
455 if (!NT_STATUS_IS_OK(status)) {
456 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
457 address, port, nt_errstr(status)));
460 if (tls_support(ldap_service->tls_params)) {
461 /* add ldaps server */
463 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
464 "ipv4", address, &port, ldap_service);
465 if (!NT_STATUS_IS_OK(status)) {
466 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
467 address, port, nt_errstr(status)));
471 /* Load LDAP database */
472 ldb = samdb_connect(ldap_service, system_session(ldap_service));
474 return NT_STATUS_INTERNAL_DB_CORRUPTION;
477 /* Query cn=ntds settings,.... */
478 ret = ldb_search(ldb, samdb_ntds_settings_dn(ldb), LDB_SCOPE_BASE, NULL, attrs, &res);
480 return NT_STATUS_INTERNAL_DB_CORRUPTION;
482 if (res->count != 1) {
484 return NT_STATUS_NOT_FOUND;
487 options = ldb_msg_find_attr_as_int(res->msgs[0], "options", 0);
491 /* if options attribute has the 0x00000001 flag set, then enable the global catlog */
492 if (options & 0x000000001) {
494 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
495 "ipv4", address, &port, ldap_service);
496 if (!NT_STATUS_IS_OK(status)) {
497 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
498 address, port, nt_errstr(status)));
506 open the ldap server sockets
508 static void ldapsrv_task_init(struct task_server *task)
510 struct ldapsrv_service *ldap_service;
512 const struct model_ops *model_ops;
514 task_server_set_title(task, "task[ldapsrv]");
516 /* run the ldap server as a single process */
517 model_ops = process_model_byname("single");
518 if (!model_ops) goto failed;
520 ldap_service = talloc_zero(task, struct ldapsrv_service);
521 if (ldap_service == NULL) goto failed;
523 ldap_service->tls_params = tls_initialise(ldap_service);
524 if (ldap_service->tls_params == NULL) goto failed;
526 if (lp_interfaces() && lp_bind_interfaces_only()) {
527 int num_interfaces = iface_count();
530 /* We have been given an interfaces line, and been
531 told to only bind to those interfaces. Create a
532 socket per interface and bind to only these.
534 for(i = 0; i < num_interfaces; i++) {
535 const char *address = iface_n_ip(i);
536 status = add_socket(task->event_ctx, model_ops, address, ldap_service);
537 if (!NT_STATUS_IS_OK(status)) goto failed;
540 status = add_socket(task->event_ctx, model_ops, lp_socket_address(), ldap_service);
541 if (!NT_STATUS_IS_OK(status)) goto failed;
547 task_server_terminate(task, "Failed to startup ldap server task");
551 called on startup of the web server service It's job is to start
552 listening on all configured sockets
554 static NTSTATUS ldapsrv_init(struct event_context *event_context,
555 const struct model_ops *model_ops)
557 return task_server_startup(event_context, model_ops, ldapsrv_task_init);
561 NTSTATUS server_service_ldap_init(void)
563 return register_server_service("ldap", ldapsrv_init);