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, NTSTATUS status)
60 struct ldapsrv_connection *conn = talloc_get_type(private,
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, &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_BLOB blob)
138 struct ldapsrv_connection *conn = talloc_get_type(private,
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, 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 event_context *ev,
171 struct timed_event *te,
175 struct ldapsrv_connection *conn = talloc_get_type(private, 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, 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, struct ldapsrv_connection);
214 packet_queue_run(conn->packet);
217 static void ldapsrv_conn_init_timeout(struct event_context *ev,
218 struct timed_event *te,
222 struct ldapsrv_connection *conn = talloc_get_type(private, 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, basedn, LDB_SCOPE_BASE, NULL, attrs, &res);
257 if (ret != LDB_SUCCESS) {
261 talloc_steal(tmp_ctx, res);
263 if (res->count != 1) {
267 conf_dn = ldb_msg_find_attr_as_dn(conn->ldb, tmp_ctx, res->msgs[0], "configurationNamingContext");
268 if (conf_dn == NULL) {
272 policy_dn = ldb_dn_copy(tmp_ctx, conf_dn);
273 ldb_dn_add_child_fmt(policy_dn, "CN=Default Query Policy,CN=Query-Policies,CN=Directory Service,CN=Windows NT,CN=Services");
274 if (policy_dn == NULL) {
278 ret = ldb_search(conn->ldb, policy_dn, LDB_SCOPE_BASE, NULL, attrs2, &res);
279 if (ret != LDB_SUCCESS) {
283 talloc_steal(tmp_ctx, res);
285 if (res->count != 1) {
289 el = ldb_msg_find_element(res->msgs[0], "lDAPAdminLimits");
294 for (i = 0; i < el->num_values; i++) {
295 char policy_name[256];
298 s = sscanf((const char *)el->values[i].data, "%255[^=]=%d", policy_name, &policy_value);
299 if (ret != 2 || policy_value == 0)
302 if (strcasecmp("InitRecvTimeout", policy_name) == 0) {
303 conn->limits.initial_timeout = policy_value;
306 if (strcasecmp("MaxConnIdleTime", policy_name) == 0) {
307 conn->limits.conn_idle_time = policy_value;
310 if (strcasecmp("MaxPageSize", policy_name) == 0) {
311 conn->limits.max_page_size = policy_value;
314 if (strcasecmp("MaxQueryDuration", policy_name) == 0) {
315 conn->limits.search_timeout = policy_value;
323 DEBUG(0, ("Failed to load ldap server query policies\n"));
324 talloc_free(tmp_ctx);
329 initialise a server_context from a open socket and register a event handler
330 for reading from that socket
332 static void ldapsrv_accept(struct stream_connection *c)
334 struct ldapsrv_service *ldapsrv_service =
335 talloc_get_type(c->private, struct ldapsrv_service);
336 struct ldapsrv_connection *conn;
337 struct cli_credentials *server_credentials;
338 struct socket_address *socket_address;
342 conn = talloc_zero(c, struct ldapsrv_connection);
344 stream_terminate_connection(c, "ldapsrv_accept: out of memory");
349 conn->connection = c;
350 conn->service = ldapsrv_service;
351 conn->sockets.raw = c->socket;
352 conn->lp_ctx = ldapsrv_service->task->lp_ctx;
356 socket_address = socket_get_my_addr(c->socket, conn);
357 if (!socket_address) {
358 ldapsrv_terminate_connection(conn, "ldapsrv_accept: failed to obtain local socket address!");
361 port = socket_address->port;
362 talloc_free(socket_address);
365 struct socket_context *tls_socket = tls_init_server(ldapsrv_service->tls_params, c->socket,
368 ldapsrv_terminate_connection(conn, "ldapsrv_accept: tls_init_server() failed");
371 talloc_unlink(c, c->socket);
372 talloc_steal(c, tls_socket);
373 c->socket = tls_socket;
374 conn->sockets.tls = tls_socket;
376 } else if (port == 3268) /* Global catalog */ {
377 conn->global_catalog = true;
379 conn->packet = packet_init(conn);
380 if (conn->packet == NULL) {
381 ldapsrv_terminate_connection(conn, "out of memory");
385 packet_set_private(conn->packet, conn);
386 packet_set_socket(conn->packet, c->socket);
387 packet_set_callback(conn->packet, ldapsrv_decode);
388 packet_set_full_request(conn->packet, ldap_full_packet);
389 packet_set_error_handler(conn->packet, ldapsrv_error_handler);
390 packet_set_event_context(conn->packet, c->event.ctx);
391 packet_set_fde(conn->packet, c->event.fde);
392 packet_set_serialise(conn->packet);
394 /* Ensure we don't get packets until the database is ready below */
395 packet_recv_disable(conn->packet);
397 server_credentials = cli_credentials_init(conn);
398 if (!server_credentials) {
399 stream_terminate_connection(c, "Failed to init server credentials\n");
403 cli_credentials_set_conf(server_credentials, conn->lp_ctx);
404 status = cli_credentials_set_machine_account(server_credentials, conn->lp_ctx);
405 if (!NT_STATUS_IS_OK(status)) {
406 stream_terminate_connection(c, talloc_asprintf(conn, "Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(status)));
409 conn->server_credentials = server_credentials;
411 /* Connections start out anonymous */
412 if (!NT_STATUS_IS_OK(auth_anonymous_session_info(conn, c->event.ctx, conn->lp_ctx, &conn->session_info))) {
413 ldapsrv_terminate_connection(conn, "failed to setup anonymous session info");
417 if (!NT_STATUS_IS_OK(ldapsrv_backend_Init(conn))) {
418 ldapsrv_terminate_connection(conn, "backend Init failed");
422 /* load limits from the conf partition */
423 ldapsrv_load_limits(conn); /* should we fail on error ? */
425 /* register the server */
426 irpc_add_name(c->msg_ctx, "ldap_server");
428 /* set connections limits */
429 conn->limits.ite = event_add_timed(c->event.ctx, conn,
430 timeval_current_ofs(conn->limits.initial_timeout, 0),
431 ldapsrv_conn_init_timeout, conn);
433 packet_recv_enable(conn->packet);
437 static const struct stream_server_ops ldap_stream_ops = {
439 .accept_connection = ldapsrv_accept,
440 .recv_handler = ldapsrv_recv,
441 .send_handler = ldapsrv_send,
445 add a socket address to the list of events, one event per port
447 static NTSTATUS add_socket(struct event_context *event_context,
448 struct loadparm_context *lp_ctx,
449 const struct model_ops *model_ops,
450 const char *address, struct ldapsrv_service *ldap_service)
454 struct ldb_context *ldb;
456 status = stream_setup_socket(event_context, lp_ctx,
457 model_ops, &ldap_stream_ops,
458 "ipv4", address, &port,
459 lp_socket_options(lp_ctx),
461 if (!NT_STATUS_IS_OK(status)) {
462 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
463 address, port, nt_errstr(status)));
466 if (tls_support(ldap_service->tls_params)) {
467 /* add ldaps server */
469 status = stream_setup_socket(event_context, lp_ctx,
470 model_ops, &ldap_stream_ops,
471 "ipv4", address, &port,
472 lp_socket_options(lp_ctx),
474 if (!NT_STATUS_IS_OK(status)) {
475 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
476 address, port, nt_errstr(status)));
480 /* Load LDAP database, but only to read our settings */
481 ldb = samdb_connect(ldap_service, ldap_service->task->event_ctx,
482 lp_ctx, system_session(ldap_service, lp_ctx));
484 return NT_STATUS_INTERNAL_DB_CORRUPTION;
487 if (samdb_is_gc(ldb)) {
489 status = stream_setup_socket(event_context, lp_ctx,
490 model_ops, &ldap_stream_ops,
491 "ipv4", address, &port,
492 lp_socket_options(lp_ctx),
494 if (!NT_STATUS_IS_OK(status)) {
495 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
496 address, port, nt_errstr(status)));
500 /* And once we are bound, free the tempoary ldb, it will
501 * connect again on each incoming LDAP connection */
508 open the ldap server sockets
510 static void ldapsrv_task_init(struct task_server *task)
513 struct ldapsrv_service *ldap_service;
515 const struct model_ops *model_ops;
517 switch (lp_server_role(task->lp_ctx)) {
518 case ROLE_STANDALONE:
519 task_server_terminate(task, "ldap_server: no LDAP server required in standalone configuration");
521 case ROLE_DOMAIN_MEMBER:
522 task_server_terminate(task, "ldap_server: no LDAP server required in member server configuration");
524 case ROLE_DOMAIN_CONTROLLER:
525 /* Yes, we want an LDAP server */
529 task_server_set_title(task, "task[ldapsrv]");
531 /* run the ldap server as a single process */
532 model_ops = process_model_startup(task->event_ctx, "single");
533 if (!model_ops) goto failed;
535 ldap_service = talloc_zero(task, struct ldapsrv_service);
536 if (ldap_service == NULL) goto failed;
538 ldap_service->task = task;
540 ldap_service->tls_params = tls_initialise(ldap_service, task->lp_ctx);
541 if (ldap_service->tls_params == NULL) goto failed;
543 if (lp_interfaces(task->lp_ctx) && lp_bind_interfaces_only(task->lp_ctx)) {
544 struct interface *ifaces;
548 load_interfaces(task, lp_interfaces(task->lp_ctx), &ifaces);
549 num_interfaces = iface_count(ifaces);
551 /* We have been given an interfaces line, and been
552 told to only bind to those interfaces. Create a
553 socket per interface and bind to only these.
555 for(i = 0; i < num_interfaces; i++) {
556 const char *address = iface_n_ip(ifaces, i);
557 status = add_socket(task->event_ctx, task->lp_ctx, model_ops, address, ldap_service);
558 if (!NT_STATUS_IS_OK(status)) goto failed;
561 status = add_socket(task->event_ctx, task->lp_ctx, model_ops,
562 lp_socket_address(task->lp_ctx), ldap_service);
563 if (!NT_STATUS_IS_OK(status)) goto failed;
566 ldapi_path = private_path(ldap_service, task->lp_ctx, "ldapi");
571 status = stream_setup_socket(task->event_ctx, task->lp_ctx,
572 model_ops, &ldap_stream_ops,
573 "unix", ldapi_path, NULL,
574 lp_socket_options(task->lp_ctx),
576 talloc_free(ldapi_path);
577 if (!NT_STATUS_IS_OK(status)) {
578 DEBUG(0,("ldapsrv failed to bind to %s - %s\n",
579 ldapi_path, nt_errstr(status)));
585 task_server_terminate(task, "Failed to startup ldap server task");
589 NTSTATUS server_service_ldap_init(void)
591 return register_server_service("ldap", ldapsrv_task_init);