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 2 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, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "lib/events/events.h"
27 #include "auth/auth.h"
28 #include "auth/credentials/credentials.h"
29 #include "librpc/gen_ndr/ndr_samr.h"
30 #include "lib/util/dlinklist.h"
31 #include "libcli/util/asn_1.h"
32 #include "ldap_server/ldap_server.h"
33 #include "smbd/service_task.h"
34 #include "smbd/service_stream.h"
35 #include "smbd/service.h"
36 #include "smbd/process_model.h"
37 #include "lib/tls/tls.h"
38 #include "lib/messaging/irpc.h"
39 #include "lib/ldb/include/ldb.h"
40 #include "lib/ldb/include/ldb_errors.h"
41 #include "system/network.h"
42 #include "lib/socket/netif.h"
43 #include "dsdb/samdb/samdb.h"
45 close the socket and shutdown a server_context
47 void ldapsrv_terminate_connection(struct ldapsrv_connection *conn,
50 stream_terminate_connection(conn->connection, reason);
56 static void ldapsrv_error_handler(void *private, NTSTATUS status)
58 struct ldapsrv_connection *conn = talloc_get_type(private,
59 struct ldapsrv_connection);
60 ldapsrv_terminate_connection(conn, nt_errstr(status));
64 process a decoded ldap message
66 static void ldapsrv_process_message(struct ldapsrv_connection *conn,
67 struct ldap_message *msg)
69 struct ldapsrv_call *call;
73 call = talloc(conn, struct ldapsrv_call);
75 ldapsrv_terminate_connection(conn, "no memory");
79 call->request = talloc_steal(call, msg);
82 call->send_callback = NULL;
83 call->send_private = NULL;
86 status = ldapsrv_do_call(call);
87 if (!NT_STATUS_IS_OK(status)) {
92 blob = data_blob(NULL, 0);
94 if (call->replies == NULL) {
99 /* build all the replies into a single blob */
100 while (call->replies) {
103 msg = call->replies->msg;
104 if (!ldap_encode(msg, &b, call)) {
105 DEBUG(0,("Failed to encode ldap reply of type %d\n", msg->type));
110 status = data_blob_append(call, &blob, b.data, b.length);
113 talloc_set_name_const(blob.data, "Outgoing, encoded LDAP packet");
115 if (!NT_STATUS_IS_OK(status)) {
120 DLIST_REMOVE(call->replies, call->replies);
123 packet_send_callback(conn->packet, blob,
124 call->send_callback, call->send_private);
132 static NTSTATUS ldapsrv_decode(void *private, DATA_BLOB blob)
135 struct ldapsrv_connection *conn = talloc_get_type(private,
136 struct ldapsrv_connection);
137 struct asn1_data asn1;
138 struct ldap_message *msg = talloc(conn, struct ldap_message);
141 return NT_STATUS_NO_MEMORY;
144 if (!asn1_load(&asn1, blob)) {
145 return NT_STATUS_NO_MEMORY;
148 status = ldap_decode(&asn1, msg);
149 if (!NT_STATUS_IS_OK(status)) {
154 data_blob_free(&blob);
155 ldapsrv_process_message(conn, msg);
163 static void ldapsrv_conn_idle_timeout(struct event_context *ev,
164 struct timed_event *te,
168 struct ldapsrv_connection *conn = talloc_get_type(private, struct ldapsrv_connection);
170 ldapsrv_terminate_connection(conn, "Timeout. No requests after bind");
174 called when a LDAP socket becomes readable
176 void ldapsrv_recv(struct stream_connection *c, uint16_t flags)
178 struct ldapsrv_connection *conn =
179 talloc_get_type(c->private, struct ldapsrv_connection);
181 if (conn->limits.ite) { /* clean initial timeout if any */
182 talloc_free(conn->limits.ite);
183 conn->limits.ite = NULL;
186 if (conn->limits.te) { /* clean idle timeout if any */
187 talloc_free(conn->limits.te);
188 conn->limits.te = NULL;
191 packet_recv(conn->packet);
193 /* set idle timeout */
194 conn->limits.te = event_add_timed(c->event.ctx, conn,
195 timeval_current_ofs(conn->limits.conn_idle_time, 0),
196 ldapsrv_conn_idle_timeout, conn);
200 called when a LDAP socket becomes writable
202 static void ldapsrv_send(struct stream_connection *c, uint16_t flags)
204 struct ldapsrv_connection *conn =
205 talloc_get_type(c->private, struct ldapsrv_connection);
207 packet_queue_run(conn->packet);
210 static void ldapsrv_conn_init_timeout(struct event_context *ev,
211 struct timed_event *te,
215 struct ldapsrv_connection *conn = talloc_get_type(private, struct ldapsrv_connection);
217 ldapsrv_terminate_connection(conn, "Timeout. No requests after initial connection");
220 static int ldapsrv_load_limits(struct ldapsrv_connection *conn)
223 const char *attrs[] = { "configurationNamingContext", NULL };
224 const char *attrs2[] = { "lDAPAdminLimits", NULL };
225 struct ldb_message_element *el;
226 struct ldb_result *res = NULL;
227 struct ldb_dn *basedn;
228 struct ldb_dn *conf_dn;
229 struct ldb_dn *policy_dn;
232 /* set defaults limits in case of failure */
233 conn->limits.initial_timeout = 120;
234 conn->limits.conn_idle_time = 900;
235 conn->limits.max_page_size = 1000;
236 conn->limits.search_timeout = 120;
239 tmp_ctx = talloc_new(conn);
240 if (tmp_ctx == NULL) {
244 basedn = ldb_dn_new(tmp_ctx, conn->ldb, NULL);
245 if ( ! ldb_dn_validate(basedn)) {
249 ret = ldb_search(conn->ldb, basedn, LDB_SCOPE_BASE, NULL, attrs, &res);
250 if (ret != LDB_SUCCESS) {
254 talloc_steal(tmp_ctx, res);
256 if (res->count != 1) {
260 conf_dn = ldb_msg_find_attr_as_dn(conn->ldb, tmp_ctx, res->msgs[0], "configurationNamingContext");
261 if (conf_dn == NULL) {
265 policy_dn = ldb_dn_copy(tmp_ctx, conf_dn);
266 ldb_dn_add_child_fmt(policy_dn, "CN=Default Query Policy,CN=Query-Policies,CN=Directory Service,CN=Windows NT,CN=Services");
267 if (policy_dn == NULL) {
271 ret = ldb_search(conn->ldb, policy_dn, LDB_SCOPE_BASE, NULL, attrs2, &res);
272 if (ret != LDB_SUCCESS) {
276 talloc_steal(tmp_ctx, res);
278 if (res->count != 1) {
282 el = ldb_msg_find_element(res->msgs[0], "lDAPAdminLimits");
287 for (i = 0; i < el->num_values; i++) {
288 char policy_name[256];
291 s = sscanf((const char *)el->values[i].data, "%255[^=]=%d", policy_name, &policy_value);
292 if (ret != 2 || policy_value == 0)
295 if (strcasecmp("InitRecvTimeout", policy_name) == 0) {
296 conn->limits.initial_timeout = policy_value;
299 if (strcasecmp("MaxConnIdleTime", policy_name) == 0) {
300 conn->limits.conn_idle_time = policy_value;
303 if (strcasecmp("MaxPageSize", policy_name) == 0) {
304 conn->limits.max_page_size = policy_value;
307 if (strcasecmp("MaxQueryDuration", policy_name) == 0) {
308 conn->limits.search_timeout = policy_value;
316 DEBUG(0, ("Failed to load ldap server query policies\n"));
317 talloc_free(tmp_ctx);
322 initialise a server_context from a open socket and register a event handler
323 for reading from that socket
325 static void ldapsrv_accept(struct stream_connection *c)
327 struct ldapsrv_service *ldapsrv_service =
328 talloc_get_type(c->private, struct ldapsrv_service);
329 struct ldapsrv_connection *conn;
330 struct cli_credentials *server_credentials;
331 struct socket_address *socket_address;
335 conn = talloc_zero(c, struct ldapsrv_connection);
337 stream_terminate_connection(c, "ldapsrv_accept: out of memory");
342 conn->connection = c;
343 conn->service = ldapsrv_service;
344 conn->sockets.raw = c->socket;
348 socket_address = socket_get_my_addr(c->socket, conn);
349 if (!socket_address) {
350 ldapsrv_terminate_connection(conn, "ldapsrv_accept: failed to obtain local socket address!");
353 port = socket_address->port;
354 talloc_free(socket_address);
357 struct socket_context *tls_socket = tls_init_server(ldapsrv_service->tls_params, c->socket,
360 ldapsrv_terminate_connection(conn, "ldapsrv_accept: tls_init_server() failed");
363 talloc_unlink(c, c->socket);
364 talloc_steal(c, tls_socket);
365 c->socket = tls_socket;
366 conn->sockets.tls = tls_socket;
368 } else if (port == 3268) /* Global catalog */ {
369 conn->global_catalog = True;
371 conn->packet = packet_init(conn);
372 if (conn->packet == NULL) {
373 ldapsrv_terminate_connection(conn, "out of memory");
377 packet_set_private(conn->packet, conn);
378 packet_set_socket(conn->packet, c->socket);
379 packet_set_callback(conn->packet, ldapsrv_decode);
380 packet_set_full_request(conn->packet, ldap_full_packet);
381 packet_set_error_handler(conn->packet, ldapsrv_error_handler);
382 packet_set_event_context(conn->packet, c->event.ctx);
383 packet_set_fde(conn->packet, c->event.fde);
384 packet_set_serialise(conn->packet);
386 /* Ensure we don't get packets until the database is ready below */
387 packet_recv_disable(conn->packet);
390 = cli_credentials_init(conn);
391 if (!server_credentials) {
392 stream_terminate_connection(c, "Failed to init server credentials\n");
396 cli_credentials_set_conf(server_credentials);
397 status = cli_credentials_set_machine_account(server_credentials);
398 if (!NT_STATUS_IS_OK(status)) {
399 stream_terminate_connection(c, talloc_asprintf(conn, "Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(status)));
402 conn->server_credentials = server_credentials;
404 /* Connections start out anonymous */
405 if (!NT_STATUS_IS_OK(auth_anonymous_session_info(conn, &conn->session_info))) {
406 ldapsrv_terminate_connection(conn, "failed to setup anonymous session info");
410 if (!NT_STATUS_IS_OK(ldapsrv_backend_Init(conn))) {
411 ldapsrv_terminate_connection(conn, "backend Init failed");
415 /* load limits from the conf partition */
416 ldapsrv_load_limits(conn); /* should we fail on error ? */
418 /* register the server */
419 irpc_add_name(c->msg_ctx, "ldap_server");
421 /* set connections limits */
422 conn->limits.ite = event_add_timed(c->event.ctx, conn,
423 timeval_current_ofs(conn->limits.initial_timeout, 0),
424 ldapsrv_conn_init_timeout, conn);
426 packet_recv_enable(conn->packet);
430 static const struct stream_server_ops ldap_stream_ops = {
432 .accept_connection = ldapsrv_accept,
433 .recv_handler = ldapsrv_recv,
434 .send_handler = ldapsrv_send,
438 add a socket address to the list of events, one event per port
440 static NTSTATUS add_socket(struct event_context *event_context,
441 const struct model_ops *model_ops,
442 const char *address, struct ldapsrv_service *ldap_service)
446 const char *attrs[] = { "options", NULL };
448 struct ldb_result *res;
449 struct ldb_context *ldb;
452 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
453 "ipv4", address, &port, ldap_service);
454 if (!NT_STATUS_IS_OK(status)) {
455 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
456 address, port, nt_errstr(status)));
459 if (tls_support(ldap_service->tls_params)) {
460 /* add ldaps server */
462 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
463 "ipv4", address, &port, ldap_service);
464 if (!NT_STATUS_IS_OK(status)) {
465 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
466 address, port, nt_errstr(status)));
470 /* Load LDAP database */
471 ldb = samdb_connect(ldap_service, system_session(ldap_service));
473 return NT_STATUS_INTERNAL_DB_CORRUPTION;
476 /* Query cn=ntds settings,.... */
477 ret = ldb_search(ldb, samdb_ntds_settings_dn(ldb), LDB_SCOPE_BASE, NULL, attrs, &res);
479 return NT_STATUS_INTERNAL_DB_CORRUPTION;
481 if (res->count != 1) {
483 return NT_STATUS_NOT_FOUND;
486 options = ldb_msg_find_attr_as_int(res->msgs[0], "options", 0);
490 /* if options attribute has the 0x00000001 flag set, then enable the global catlog */
491 if (options & 0x000000001) {
493 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
494 "ipv4", address, &port, ldap_service);
495 if (!NT_STATUS_IS_OK(status)) {
496 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
497 address, port, nt_errstr(status)));
505 open the ldap server sockets
507 static void ldapsrv_task_init(struct task_server *task)
509 struct ldapsrv_service *ldap_service;
511 const struct model_ops *model_ops;
513 task_server_set_title(task, "task[ldapsrv]");
515 /* run the ldap server as a single process */
516 model_ops = process_model_byname("single");
517 if (!model_ops) goto failed;
519 ldap_service = talloc_zero(task, struct ldapsrv_service);
520 if (ldap_service == NULL) goto failed;
522 ldap_service->tls_params = tls_initialise(ldap_service);
523 if (ldap_service->tls_params == NULL) goto failed;
525 if (lp_interfaces() && lp_bind_interfaces_only()) {
526 int num_interfaces = iface_count();
529 /* We have been given an interfaces line, and been
530 told to only bind to those interfaces. Create a
531 socket per interface and bind to only these.
533 for(i = 0; i < num_interfaces; i++) {
534 const char *address = iface_n_ip(i);
535 status = add_socket(task->event_ctx, model_ops, address, ldap_service);
536 if (!NT_STATUS_IS_OK(status)) goto failed;
539 status = add_socket(task->event_ctx, model_ops, lp_socket_address(), ldap_service);
540 if (!NT_STATUS_IS_OK(status)) goto failed;
546 task_server_terminate(task, "Failed to startup ldap server task");
550 called on startup of the web server service It's job is to start
551 listening on all configured sockets
553 static NTSTATUS ldapsrv_init(struct event_context *event_context,
554 const struct model_ops *model_ops)
556 return task_server_startup(event_context, model_ops, ldapsrv_task_init);
560 NTSTATUS server_service_ldap_init(void)
562 return register_server_service("ldap", ldapsrv_init);