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 "../lib/util/asn1.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 "libcli/ldap/ldap.h"
41 #include "libcli/ldap/ldap_proto.h"
42 #include "system/network.h"
43 #include "lib/socket/netif.h"
44 #include "dsdb/samdb/samdb.h"
45 #include "param/param.h"
47 close the socket and shutdown a server_context
49 void ldapsrv_terminate_connection(struct ldapsrv_connection *conn,
52 stream_terminate_connection(conn->connection, reason);
58 static void ldapsrv_error_handler(void *private_data, NTSTATUS status)
60 struct ldapsrv_connection *conn = talloc_get_type(private_data,
61 struct ldapsrv_connection);
62 ldapsrv_terminate_connection(conn, nt_errstr(status));
66 process a decoded ldap message
68 static void ldapsrv_process_message(struct ldapsrv_connection *conn,
69 struct ldap_message *msg)
71 struct ldapsrv_call *call;
75 call = talloc(conn, struct ldapsrv_call);
77 ldapsrv_terminate_connection(conn, "no memory");
81 call->request = talloc_steal(call, msg);
84 call->send_callback = NULL;
85 call->send_private = NULL;
88 status = ldapsrv_do_call(call);
89 if (!NT_STATUS_IS_OK(status)) {
94 blob = data_blob(NULL, 0);
96 if (call->replies == NULL) {
101 /* build all the replies into a single blob */
102 while (call->replies) {
106 msg = call->replies->msg;
107 if (!ldap_encode(msg, samba_ldap_control_handlers(), &b, call)) {
108 DEBUG(0,("Failed to encode ldap reply of type %d\n", msg->type));
113 ret = data_blob_append(call, &blob, b.data, b.length);
116 talloc_set_name_const(blob.data, "Outgoing, encoded LDAP packet");
123 DLIST_REMOVE(call->replies, call->replies);
126 packet_send_callback(conn->packet, blob,
127 call->send_callback, call->send_private);
135 static NTSTATUS ldapsrv_decode(void *private_data, DATA_BLOB blob)
138 struct ldapsrv_connection *conn = talloc_get_type(private_data,
139 struct ldapsrv_connection);
140 struct asn1_data *asn1 = asn1_init(conn);
141 struct ldap_message *msg = talloc(conn, struct ldap_message);
143 if (asn1 == NULL || msg == NULL) {
144 return NT_STATUS_NO_MEMORY;
147 if (!asn1_load(asn1, blob)) {
150 return NT_STATUS_NO_MEMORY;
153 status = ldap_decode(asn1, samba_ldap_control_handlers(), msg);
154 if (!NT_STATUS_IS_OK(status)) {
159 data_blob_free(&blob);
160 talloc_steal(conn, msg);
163 ldapsrv_process_message(conn, msg);
170 static void ldapsrv_conn_idle_timeout(struct tevent_context *ev,
171 struct tevent_timer *te,
175 struct ldapsrv_connection *conn = talloc_get_type(private_data, struct ldapsrv_connection);
177 ldapsrv_terminate_connection(conn, "Timeout. No requests after bind");
181 called when a LDAP socket becomes readable
183 void ldapsrv_recv(struct stream_connection *c, uint16_t flags)
185 struct ldapsrv_connection *conn =
186 talloc_get_type(c->private_data, struct ldapsrv_connection);
188 if (conn->limits.ite) { /* clean initial timeout if any */
189 talloc_free(conn->limits.ite);
190 conn->limits.ite = NULL;
193 if (conn->limits.te) { /* clean idle timeout if any */
194 talloc_free(conn->limits.te);
195 conn->limits.te = NULL;
198 packet_recv(conn->packet);
200 /* set idle timeout */
201 conn->limits.te = event_add_timed(c->event.ctx, conn,
202 timeval_current_ofs(conn->limits.conn_idle_time, 0),
203 ldapsrv_conn_idle_timeout, conn);
207 called when a LDAP socket becomes writable
209 static void ldapsrv_send(struct stream_connection *c, uint16_t flags)
211 struct ldapsrv_connection *conn =
212 talloc_get_type(c->private_data, struct ldapsrv_connection);
214 packet_queue_run(conn->packet);
217 static void ldapsrv_conn_init_timeout(struct tevent_context *ev,
218 struct tevent_timer *te,
222 struct ldapsrv_connection *conn = talloc_get_type(private_data, struct ldapsrv_connection);
224 ldapsrv_terminate_connection(conn, "Timeout. No requests after initial connection");
227 static int ldapsrv_load_limits(struct ldapsrv_connection *conn)
230 const char *attrs[] = { "configurationNamingContext", NULL };
231 const char *attrs2[] = { "lDAPAdminLimits", NULL };
232 struct ldb_message_element *el;
233 struct ldb_result *res = NULL;
234 struct ldb_dn *basedn;
235 struct ldb_dn *conf_dn;
236 struct ldb_dn *policy_dn;
239 /* set defaults limits in case of failure */
240 conn->limits.initial_timeout = 120;
241 conn->limits.conn_idle_time = 900;
242 conn->limits.max_page_size = 1000;
243 conn->limits.search_timeout = 120;
246 tmp_ctx = talloc_new(conn);
247 if (tmp_ctx == NULL) {
251 basedn = ldb_dn_new(tmp_ctx, conn->ldb, NULL);
252 if ( ! ldb_dn_validate(basedn)) {
256 ret = ldb_search(conn->ldb, tmp_ctx, &res, basedn, LDB_SCOPE_BASE, attrs, NULL);
257 if (ret != LDB_SUCCESS) {
261 if (res->count != 1) {
265 conf_dn = ldb_msg_find_attr_as_dn(conn->ldb, tmp_ctx, res->msgs[0], "configurationNamingContext");
266 if (conf_dn == NULL) {
270 policy_dn = ldb_dn_copy(tmp_ctx, conf_dn);
271 ldb_dn_add_child_fmt(policy_dn, "CN=Default Query Policy,CN=Query-Policies,CN=Directory Service,CN=Windows NT,CN=Services");
272 if (policy_dn == NULL) {
276 ret = ldb_search(conn->ldb, tmp_ctx, &res, policy_dn, LDB_SCOPE_BASE, attrs2, NULL);
277 if (ret != LDB_SUCCESS) {
281 if (res->count != 1) {
285 el = ldb_msg_find_element(res->msgs[0], "lDAPAdminLimits");
290 for (i = 0; i < el->num_values; i++) {
291 char policy_name[256];
294 s = sscanf((const char *)el->values[i].data, "%255[^=]=%d", policy_name, &policy_value);
295 if (ret != 2 || policy_value == 0)
298 if (strcasecmp("InitRecvTimeout", policy_name) == 0) {
299 conn->limits.initial_timeout = policy_value;
302 if (strcasecmp("MaxConnIdleTime", policy_name) == 0) {
303 conn->limits.conn_idle_time = policy_value;
306 if (strcasecmp("MaxPageSize", policy_name) == 0) {
307 conn->limits.max_page_size = policy_value;
310 if (strcasecmp("MaxQueryDuration", policy_name) == 0) {
311 conn->limits.search_timeout = policy_value;
319 DEBUG(0, ("Failed to load ldap server query policies\n"));
320 talloc_free(tmp_ctx);
325 initialise a server_context from a open socket and register a event handler
326 for reading from that socket
328 static void ldapsrv_accept(struct stream_connection *c,
329 struct auth_session_info *session_info)
331 struct ldapsrv_service *ldapsrv_service =
332 talloc_get_type(c->private_data, struct ldapsrv_service);
333 struct ldapsrv_connection *conn;
334 struct cli_credentials *server_credentials;
335 struct socket_address *socket_address;
339 conn = talloc_zero(c, struct ldapsrv_connection);
341 stream_terminate_connection(c, "ldapsrv_accept: out of memory");
346 conn->connection = c;
347 conn->service = ldapsrv_service;
348 conn->sockets.raw = c->socket;
349 conn->lp_ctx = ldapsrv_service->task->lp_ctx;
351 c->private_data = conn;
353 socket_address = socket_get_my_addr(c->socket, conn);
354 if (!socket_address) {
355 ldapsrv_terminate_connection(conn, "ldapsrv_accept: failed to obtain local socket address!");
358 port = socket_address->port;
359 talloc_free(socket_address);
362 struct socket_context *tls_socket = tls_init_server(ldapsrv_service->tls_params, c->socket,
365 ldapsrv_terminate_connection(conn, "ldapsrv_accept: tls_init_server() failed");
368 talloc_unlink(c, c->socket);
369 talloc_steal(c, tls_socket);
370 c->socket = tls_socket;
371 conn->sockets.tls = tls_socket;
373 } else if (port == 3268) /* Global catalog */ {
374 conn->global_catalog = true;
376 conn->packet = packet_init(conn);
377 if (conn->packet == NULL) {
378 ldapsrv_terminate_connection(conn, "out of memory");
382 packet_set_private(conn->packet, conn);
383 packet_set_socket(conn->packet, c->socket);
384 packet_set_callback(conn->packet, ldapsrv_decode);
385 packet_set_full_request(conn->packet, ldap_full_packet);
386 packet_set_error_handler(conn->packet, ldapsrv_error_handler);
387 packet_set_event_context(conn->packet, c->event.ctx);
388 packet_set_fde(conn->packet, c->event.fde);
389 packet_set_serialise(conn->packet);
391 if (conn->sockets.tls) {
392 packet_set_unreliable_select(conn->packet);
395 /* Ensure we don't get packets until the database is ready below */
396 packet_recv_disable(conn->packet);
398 server_credentials = cli_credentials_init(conn);
399 if (!server_credentials) {
400 stream_terminate_connection(c, "Failed to init server credentials\n");
404 cli_credentials_set_conf(server_credentials, conn->lp_ctx);
405 status = cli_credentials_set_machine_account(server_credentials, conn->lp_ctx);
406 if (!NT_STATUS_IS_OK(status)) {
407 stream_terminate_connection(c, talloc_asprintf(conn, "Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(status)));
410 conn->server_credentials = server_credentials;
412 conn->session_info = talloc_move(conn, &session_info);
414 if (!NT_STATUS_IS_OK(ldapsrv_backend_Init(conn))) {
415 ldapsrv_terminate_connection(conn, "backend Init failed");
419 /* load limits from the conf partition */
420 ldapsrv_load_limits(conn); /* should we fail on error ? */
422 /* register the server */
423 irpc_add_name(c->msg_ctx, "ldap_server");
425 /* set connections limits */
426 conn->limits.ite = event_add_timed(c->event.ctx, conn,
427 timeval_current_ofs(conn->limits.initial_timeout, 0),
428 ldapsrv_conn_init_timeout, conn);
430 packet_recv_enable(conn->packet);
434 static void ldapsrv_accept_nonpriv(struct stream_connection *c)
436 struct ldapsrv_service *ldapsrv_service = talloc_get_type_abort(
437 c->private_data, struct ldapsrv_service);
438 struct auth_session_info *session_info;
441 status = auth_anonymous_session_info(
442 c, c->event.ctx, ldapsrv_service->task->lp_ctx, &session_info);
443 if (!NT_STATUS_IS_OK(status)) {
444 stream_terminate_connection(c, "failed to setup anonymous "
448 ldapsrv_accept(c, session_info);
451 static const struct stream_server_ops ldap_stream_nonpriv_ops = {
453 .accept_connection = ldapsrv_accept_nonpriv,
454 .recv_handler = ldapsrv_recv,
455 .send_handler = ldapsrv_send,
458 /* The feature removed behind an #ifdef until we can do it properly
459 * with an EXTERNAL bind. */
461 #define WITH_LDAPI_PRIV_SOCKET
463 #ifdef WITH_LDAPI_PRIV_SOCKET
464 static void ldapsrv_accept_priv(struct stream_connection *c)
466 struct ldapsrv_service *ldapsrv_service = talloc_get_type_abort(
467 c->private_data, struct ldapsrv_service);
468 struct auth_session_info *session_info;
471 status = auth_system_session_info(
472 c, ldapsrv_service->task->lp_ctx, &session_info);
473 if (!NT_STATUS_IS_OK(status)) {
474 stream_terminate_connection(c, "failed to setup system "
478 ldapsrv_accept(c, session_info);
481 static const struct stream_server_ops ldap_stream_priv_ops = {
483 .accept_connection = ldapsrv_accept_priv,
484 .recv_handler = ldapsrv_recv,
485 .send_handler = ldapsrv_send,
490 add a socket address to the list of events, one event per port
492 static NTSTATUS add_socket(struct tevent_context *event_context,
493 struct loadparm_context *lp_ctx,
494 const struct model_ops *model_ops,
495 const char *address, struct ldapsrv_service *ldap_service)
499 struct ldb_context *ldb;
501 status = stream_setup_socket(event_context, lp_ctx,
502 model_ops, &ldap_stream_nonpriv_ops,
503 "ipv4", address, &port,
504 lp_socket_options(lp_ctx),
506 if (!NT_STATUS_IS_OK(status)) {
507 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
508 address, port, nt_errstr(status)));
511 if (tls_support(ldap_service->tls_params)) {
512 /* add ldaps server */
514 status = stream_setup_socket(event_context, lp_ctx,
516 &ldap_stream_nonpriv_ops,
517 "ipv4", address, &port,
518 lp_socket_options(lp_ctx),
520 if (!NT_STATUS_IS_OK(status)) {
521 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
522 address, port, nt_errstr(status)));
526 /* Load LDAP database, but only to read our settings */
527 ldb = samdb_connect(ldap_service, ldap_service->task->event_ctx,
528 lp_ctx, system_session(ldap_service, lp_ctx));
530 return NT_STATUS_INTERNAL_DB_CORRUPTION;
533 if (samdb_is_gc(ldb)) {
535 status = stream_setup_socket(event_context, lp_ctx,
537 &ldap_stream_nonpriv_ops,
538 "ipv4", address, &port,
539 lp_socket_options(lp_ctx),
541 if (!NT_STATUS_IS_OK(status)) {
542 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
543 address, port, nt_errstr(status)));
547 /* And once we are bound, free the tempoary ldb, it will
548 * connect again on each incoming LDAP connection */
555 open the ldap server sockets
557 static void ldapsrv_task_init(struct task_server *task)
560 #ifdef WITH_LDAPI_PRIV_SOCKET
563 struct ldapsrv_service *ldap_service;
565 const struct model_ops *model_ops;
567 switch (lp_server_role(task->lp_ctx)) {
568 case ROLE_STANDALONE:
569 task_server_terminate(task, "ldap_server: no LDAP server required in standalone configuration");
571 case ROLE_DOMAIN_MEMBER:
572 task_server_terminate(task, "ldap_server: no LDAP server required in member server configuration");
574 case ROLE_DOMAIN_CONTROLLER:
575 /* Yes, we want an LDAP server */
579 task_server_set_title(task, "task[ldapsrv]");
581 /* run the ldap server as a single process */
582 model_ops = process_model_startup(task->event_ctx, "single");
583 if (!model_ops) goto failed;
585 ldap_service = talloc_zero(task, struct ldapsrv_service);
586 if (ldap_service == NULL) goto failed;
588 ldap_service->task = task;
590 ldap_service->tls_params = tls_initialise(ldap_service, task->lp_ctx);
591 if (ldap_service->tls_params == NULL) goto failed;
593 if (lp_interfaces(task->lp_ctx) && lp_bind_interfaces_only(task->lp_ctx)) {
594 struct interface *ifaces;
598 load_interfaces(task, lp_interfaces(task->lp_ctx), &ifaces);
599 num_interfaces = iface_count(ifaces);
601 /* We have been given an interfaces line, and been
602 told to only bind to those interfaces. Create a
603 socket per interface and bind to only these.
605 for(i = 0; i < num_interfaces; i++) {
606 const char *address = iface_n_ip(ifaces, i);
607 status = add_socket(task->event_ctx, task->lp_ctx, model_ops, address, ldap_service);
608 if (!NT_STATUS_IS_OK(status)) goto failed;
611 status = add_socket(task->event_ctx, task->lp_ctx, model_ops,
612 lp_socket_address(task->lp_ctx), ldap_service);
613 if (!NT_STATUS_IS_OK(status)) goto failed;
616 ldapi_path = private_path(ldap_service, task->lp_ctx, "ldapi");
621 status = stream_setup_socket(task->event_ctx, task->lp_ctx,
622 model_ops, &ldap_stream_nonpriv_ops,
623 "unix", ldapi_path, NULL,
624 lp_socket_options(task->lp_ctx),
626 talloc_free(ldapi_path);
627 if (!NT_STATUS_IS_OK(status)) {
628 DEBUG(0,("ldapsrv failed to bind to %s - %s\n",
629 ldapi_path, nt_errstr(status)));
632 #ifdef WITH_LDAPI_PRIV_SOCKET
633 priv_dir = private_path(ldap_service, task->lp_ctx, "ldap_priv");
634 if (priv_dir == NULL) {
638 * Make sure the directory for the privileged ldapi socket exists, and
639 * is of the correct permissions
641 if (!directory_create_or_exist(priv_dir, geteuid(), 0750)) {
642 task_server_terminate(task, "Cannot create ldap "
643 "privileged ldapi directory");
646 ldapi_path = talloc_asprintf(ldap_service, "%s/ldapi", priv_dir);
647 talloc_free(priv_dir);
648 if (ldapi_path == NULL) {
652 status = stream_setup_socket(task->event_ctx, task->lp_ctx,
653 model_ops, &ldap_stream_priv_ops,
654 "unix", ldapi_path, NULL,
655 lp_socket_options(task->lp_ctx),
657 talloc_free(ldapi_path);
658 if (!NT_STATUS_IS_OK(status)) {
659 DEBUG(0,("ldapsrv failed to bind to %s - %s\n",
660 ldapi_path, nt_errstr(status)));
667 task_server_terminate(task, "Failed to startup ldap server task");
671 NTSTATUS server_service_ldap_init(void)
673 return register_server_service("ldap", ldapsrv_task_init);