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)
134 struct ldapsrv_connection *conn = talloc_get_type(private,
135 struct ldapsrv_connection);
136 struct asn1_data asn1;
137 struct ldap_message *msg = talloc(conn, struct ldap_message);
140 return NT_STATUS_NO_MEMORY;
143 if (!asn1_load(&asn1, blob)) {
144 return NT_STATUS_NO_MEMORY;
147 if (!ldap_decode(&asn1, msg)) {
149 return NT_STATUS_LDAP(LDAP_PROTOCOL_ERROR);
152 data_blob_free(&blob);
153 ldapsrv_process_message(conn, msg);
161 static void ldapsrv_conn_idle_timeout(struct event_context *ev,
162 struct timed_event *te,
166 struct ldapsrv_connection *conn = talloc_get_type(private, struct ldapsrv_connection);
168 ldapsrv_terminate_connection(conn, "Timeout. No requests after bind");
172 called when a LDAP socket becomes readable
174 void ldapsrv_recv(struct stream_connection *c, uint16_t flags)
176 struct ldapsrv_connection *conn =
177 talloc_get_type(c->private, struct ldapsrv_connection);
179 if (conn->limits.ite) { /* clean initial timeout if any */
180 talloc_free(conn->limits.ite);
181 conn->limits.ite = NULL;
184 if (conn->limits.te) { /* clean idle timeout if any */
185 talloc_free(conn->limits.te);
186 conn->limits.te = NULL;
189 packet_recv(conn->packet);
191 /* set idle timeout */
192 conn->limits.te = event_add_timed(c->event.ctx, conn,
193 timeval_current_ofs(conn->limits.conn_idle_time, 0),
194 ldapsrv_conn_idle_timeout, conn);
198 called when a LDAP socket becomes writable
200 static void ldapsrv_send(struct stream_connection *c, uint16_t flags)
202 struct ldapsrv_connection *conn =
203 talloc_get_type(c->private, struct ldapsrv_connection);
205 packet_queue_run(conn->packet);
208 static void ldapsrv_conn_init_timeout(struct event_context *ev,
209 struct timed_event *te,
213 struct ldapsrv_connection *conn = talloc_get_type(private, struct ldapsrv_connection);
215 ldapsrv_terminate_connection(conn, "Timeout. No requests after initial connection");
218 static int ldapsrv_load_limits(struct ldapsrv_connection *conn)
221 const char *attrs[] = { "configurationNamingContext", NULL };
222 const char *attrs2[] = { "lDAPAdminLimits", NULL };
223 struct ldb_message_element *el;
224 struct ldb_result *res = NULL;
225 struct ldb_dn *basedn;
226 struct ldb_dn *conf_dn;
227 struct ldb_dn *policy_dn;
230 /* set defaults limits in case of failure */
231 conn->limits.initial_timeout = 120;
232 conn->limits.conn_idle_time = 900;
233 conn->limits.max_page_size = 1000;
234 conn->limits.search_timeout = 120;
237 tmp_ctx = talloc_new(conn);
238 if (tmp_ctx == NULL) {
242 basedn = ldb_dn_new(tmp_ctx, conn->ldb, NULL);
243 if ( ! ldb_dn_validate(basedn)) {
247 ret = ldb_search(conn->ldb, basedn, LDB_SCOPE_BASE, NULL, attrs, &res);
248 if (ret != LDB_SUCCESS) {
252 talloc_steal(tmp_ctx, res);
254 if (res->count != 1) {
258 conf_dn = ldb_msg_find_attr_as_dn(conn->ldb, tmp_ctx, res->msgs[0], "configurationNamingContext");
259 if (conf_dn == NULL) {
263 policy_dn = ldb_dn_copy(tmp_ctx, conf_dn);
264 ldb_dn_add_child_fmt(policy_dn, "CN=Default Query Policy,CN=Query-Policies,CN=Directory Service,CN=Windows NT,CN=Services");
265 if (policy_dn == NULL) {
269 ret = ldb_search(conn->ldb, policy_dn, LDB_SCOPE_BASE, NULL, attrs2, &res);
270 if (ret != LDB_SUCCESS) {
274 talloc_steal(tmp_ctx, res);
276 if (res->count != 1) {
280 el = ldb_msg_find_element(res->msgs[0], "lDAPAdminLimits");
285 for (i = 0; i < el->num_values; i++) {
286 char policy_name[256];
289 s = sscanf((const char *)el->values[i].data, "%255[^=]=%d", policy_name, &policy_value);
290 if (ret != 2 || policy_value == 0)
293 if (strcasecmp("InitRecvTimeout", policy_name) == 0) {
294 conn->limits.initial_timeout = policy_value;
297 if (strcasecmp("MaxConnIdleTime", policy_name) == 0) {
298 conn->limits.conn_idle_time = policy_value;
301 if (strcasecmp("MaxPageSize", policy_name) == 0) {
302 conn->limits.max_page_size = policy_value;
305 if (strcasecmp("MaxQueryDuration", policy_name) == 0) {
306 conn->limits.search_timeout = policy_value;
314 DEBUG(0, ("Failed to load ldap server query policies\n"));
315 talloc_free(tmp_ctx);
320 initialise a server_context from a open socket and register a event handler
321 for reading from that socket
323 static void ldapsrv_accept(struct stream_connection *c)
325 struct ldapsrv_service *ldapsrv_service =
326 talloc_get_type(c->private, struct ldapsrv_service);
327 struct ldapsrv_connection *conn;
328 struct cli_credentials *server_credentials;
329 struct socket_address *socket_address;
333 conn = talloc_zero(c, struct ldapsrv_connection);
335 stream_terminate_connection(c, "ldapsrv_accept: out of memory");
340 conn->connection = c;
341 conn->service = ldapsrv_service;
342 conn->sockets.raw = c->socket;
346 socket_address = socket_get_my_addr(c->socket, conn);
347 if (!socket_address) {
348 ldapsrv_terminate_connection(conn, "ldapsrv_accept: failed to obtain local socket address!");
351 port = socket_address->port;
352 talloc_free(socket_address);
355 struct socket_context *tls_socket = tls_init_server(ldapsrv_service->tls_params, c->socket,
358 ldapsrv_terminate_connection(conn, "ldapsrv_accept: tls_init_server() failed");
361 talloc_unlink(c, c->socket);
362 talloc_steal(c, tls_socket);
363 c->socket = tls_socket;
364 conn->sockets.tls = tls_socket;
366 } else if (port == 3268) /* Global catalog */ {
367 conn->global_catalog = True;
369 conn->packet = packet_init(conn);
370 if (conn->packet == NULL) {
371 ldapsrv_terminate_connection(conn, "out of memory");
375 packet_set_private(conn->packet, conn);
376 packet_set_socket(conn->packet, c->socket);
377 packet_set_callback(conn->packet, ldapsrv_decode);
378 packet_set_full_request(conn->packet, ldap_full_packet);
379 packet_set_error_handler(conn->packet, ldapsrv_error_handler);
380 packet_set_event_context(conn->packet, c->event.ctx);
381 packet_set_fde(conn->packet, c->event.fde);
382 packet_set_serialise(conn->packet);
384 /* Ensure we don't get packets until the database is ready below */
385 packet_recv_disable(conn->packet);
388 = cli_credentials_init(conn);
389 if (!server_credentials) {
390 stream_terminate_connection(c, "Failed to init server credentials\n");
394 cli_credentials_set_conf(server_credentials);
395 status = cli_credentials_set_machine_account(server_credentials);
396 if (!NT_STATUS_IS_OK(status)) {
397 stream_terminate_connection(c, talloc_asprintf(conn, "Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(status)));
400 conn->server_credentials = server_credentials;
402 /* Connections start out anonymous */
403 if (!NT_STATUS_IS_OK(auth_anonymous_session_info(conn, &conn->session_info))) {
404 ldapsrv_terminate_connection(conn, "failed to setup anonymous session info");
408 if (!NT_STATUS_IS_OK(ldapsrv_backend_Init(conn))) {
409 ldapsrv_terminate_connection(conn, "backend Init failed");
413 /* load limits from the conf partition */
414 ldapsrv_load_limits(conn); /* should we fail on error ? */
416 /* register the server */
417 irpc_add_name(c->msg_ctx, "ldap_server");
419 /* set connections limits */
420 conn->limits.ite = event_add_timed(c->event.ctx, conn,
421 timeval_current_ofs(conn->limits.initial_timeout, 0),
422 ldapsrv_conn_init_timeout, conn);
424 packet_recv_enable(conn->packet);
428 static const struct stream_server_ops ldap_stream_ops = {
430 .accept_connection = ldapsrv_accept,
431 .recv_handler = ldapsrv_recv,
432 .send_handler = ldapsrv_send,
436 add a socket address to the list of events, one event per port
438 static NTSTATUS add_socket(struct event_context *event_context,
439 const struct model_ops *model_ops,
440 const char *address, struct ldapsrv_service *ldap_service)
444 const char *attrs[] = { "options", NULL };
446 struct ldb_result *res;
447 struct ldb_context *ldb;
450 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
451 "ipv4", address, &port, ldap_service);
452 if (!NT_STATUS_IS_OK(status)) {
453 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
454 address, port, nt_errstr(status)));
457 if (tls_support(ldap_service->tls_params)) {
458 /* add ldaps server */
460 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
461 "ipv4", address, &port, ldap_service);
462 if (!NT_STATUS_IS_OK(status)) {
463 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
464 address, port, nt_errstr(status)));
468 /* Load LDAP database */
469 ldb = samdb_connect(ldap_service, system_session(ldap_service));
471 return NT_STATUS_INTERNAL_DB_CORRUPTION;
474 /* Query cn=ntds settings,.... */
475 ret = ldb_search(ldb, samdb_ntds_settings_dn(ldb), LDB_SCOPE_BASE, NULL, attrs, &res);
477 return NT_STATUS_INTERNAL_DB_CORRUPTION;
479 if (res->count != 1) {
481 return NT_STATUS_NOT_FOUND;
484 options = ldb_msg_find_attr_as_int(res->msgs[0], "options", 0);
488 /* if options attribute is 1, then enable the global catlog */
491 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
492 "ipv4", address, &port, ldap_service);
493 if (!NT_STATUS_IS_OK(status)) {
494 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
495 address, port, nt_errstr(status)));
503 open the ldap server sockets
505 static void ldapsrv_task_init(struct task_server *task)
507 struct ldapsrv_service *ldap_service;
509 const struct model_ops *model_ops;
511 task_server_set_title(task, "task[ldapsrv]");
513 /* run the ldap server as a single process */
514 model_ops = process_model_byname("single");
515 if (!model_ops) goto failed;
517 ldap_service = talloc_zero(task, struct ldapsrv_service);
518 if (ldap_service == NULL) goto failed;
520 ldap_service->tls_params = tls_initialise(ldap_service);
521 if (ldap_service->tls_params == NULL) goto failed;
523 if (lp_interfaces() && lp_bind_interfaces_only()) {
524 int num_interfaces = iface_count();
527 /* We have been given an interfaces line, and been
528 told to only bind to those interfaces. Create a
529 socket per interface and bind to only these.
531 for(i = 0; i < num_interfaces; i++) {
532 const char *address = iface_n_ip(i);
533 status = add_socket(task->event_ctx, model_ops, address, ldap_service);
534 if (!NT_STATUS_IS_OK(status)) goto failed;
537 status = add_socket(task->event_ctx, model_ops, lp_socket_address(), ldap_service);
538 if (!NT_STATUS_IS_OK(status)) goto failed;
544 task_server_terminate(task, "Failed to startup ldap server task");
548 called on startup of the web server service It's job is to start
549 listening on all configured sockets
551 static NTSTATUS ldapsrv_init(struct event_context *event_context,
552 const struct model_ops *model_ops)
554 return task_server_startup(event_context, model_ops, ldapsrv_task_init);
558 NTSTATUS server_service_ldap_init(void)
560 return register_server_service("ldap", ldapsrv_init);