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 "dlinklist.h"
29 #include "libcli/util/asn_1.h"
30 #include "ldap_server/ldap_server.h"
31 #include "smbd/service_task.h"
32 #include "smbd/service_stream.h"
33 #include "smbd/service.h"
34 #include "lib/tls/tls.h"
35 #include "lib/messaging/irpc.h"
36 #include "lib/ldb/include/ldb.h"
37 #include "lib/ldb/include/ldb_errors.h"
38 #include "system/network.h"
39 #include "netif/netif.h"
42 close the socket and shutdown a server_context
44 void ldapsrv_terminate_connection(struct ldapsrv_connection *conn,
47 stream_terminate_connection(conn->connection, reason);
53 static void ldapsrv_error_handler(void *private, NTSTATUS status)
55 struct ldapsrv_connection *conn = talloc_get_type(private,
56 struct ldapsrv_connection);
57 ldapsrv_terminate_connection(conn, nt_errstr(status));
61 process a decoded ldap message
63 static void ldapsrv_process_message(struct ldapsrv_connection *conn,
64 struct ldap_message *msg)
66 struct ldapsrv_call *call;
70 call = talloc(conn, struct ldapsrv_call);
72 ldapsrv_terminate_connection(conn, "no memory");
76 call->request = talloc_steal(call, msg);
79 call->send_callback = NULL;
80 call->send_private = NULL;
83 status = ldapsrv_do_call(call);
84 if (!NT_STATUS_IS_OK(status)) {
89 blob = data_blob(NULL, 0);
91 if (call->replies == NULL) {
96 /* build all the replies into a single blob */
97 while (call->replies) {
100 msg = call->replies->msg;
101 if (!ldap_encode(msg, &b, call)) {
102 DEBUG(0,("Failed to encode ldap reply of type %d\n", msg->type));
107 status = data_blob_append(call, &blob, b.data, b.length);
110 talloc_set_name_const(blob.data, "Outgoing, encoded LDAP packet");
112 if (!NT_STATUS_IS_OK(status)) {
117 DLIST_REMOVE(call->replies, call->replies);
120 packet_send_callback(conn->packet, blob,
121 call->send_callback, call->send_private);
129 static NTSTATUS ldapsrv_decode(void *private, DATA_BLOB blob)
131 struct ldapsrv_connection *conn = talloc_get_type(private,
132 struct ldapsrv_connection);
133 struct asn1_data asn1;
134 struct ldap_message *msg = talloc(conn, struct ldap_message);
137 return NT_STATUS_NO_MEMORY;
140 if (!asn1_load(&asn1, blob)) {
141 return NT_STATUS_NO_MEMORY;
144 if (!ldap_decode(&asn1, msg)) {
146 return NT_STATUS_LDAP(LDAP_PROTOCOL_ERROR);
149 data_blob_free(&blob);
150 ldapsrv_process_message(conn, msg);
158 static void ldapsrv_conn_idle_timeout(struct event_context *ev,
159 struct timed_event *te,
163 struct ldapsrv_connection *conn = talloc_get_type(private, struct ldapsrv_connection);
165 ldapsrv_terminate_connection(conn, "Timeout. No requests after bind");
169 called when a LDAP socket becomes readable
171 void ldapsrv_recv(struct stream_connection *c, uint16_t flags)
173 struct ldapsrv_connection *conn =
174 talloc_get_type(c->private, struct ldapsrv_connection);
176 if (conn->limits.ite) { /* clean initial timeout if any */
177 talloc_free(conn->limits.ite);
178 conn->limits.ite = NULL;
181 if (conn->limits.te) { /* clean idle timeout if any */
182 talloc_free(conn->limits.te);
183 conn->limits.te = NULL;
186 packet_recv(conn->packet);
188 /* set idle timeout */
189 conn->limits.te = event_add_timed(c->event.ctx, conn,
190 timeval_current_ofs(conn->limits.conn_idle_time, 0),
191 ldapsrv_conn_idle_timeout, conn);
195 called when a LDAP socket becomes writable
197 static void ldapsrv_send(struct stream_connection *c, uint16_t flags)
199 struct ldapsrv_connection *conn =
200 talloc_get_type(c->private, struct ldapsrv_connection);
202 packet_queue_run(conn->packet);
205 static void ldapsrv_conn_init_timeout(struct event_context *ev,
206 struct timed_event *te,
210 struct ldapsrv_connection *conn = talloc_get_type(private, struct ldapsrv_connection);
212 ldapsrv_terminate_connection(conn, "Timeout. No requests after initial connection");
215 static int ldapsrv_load_limits(struct ldapsrv_connection *conn)
218 const char *attrs[] = { "configurationNamingContext", NULL };
219 const char *attrs2[] = { "lDAPAdminLimits", NULL };
220 const char *conf_dn_s;
221 struct ldb_message_element *el;
222 struct ldb_result *res = NULL;
223 struct ldb_dn *basedn;
224 struct ldb_dn *conf_dn;
225 struct ldb_dn *policy_dn;
228 /* set defaults limits in case of failure */
229 conn->limits.initial_timeout = 120;
230 conn->limits.conn_idle_time = 900;
231 conn->limits.max_page_size = 1000;
232 conn->limits.search_timeout = 120;
235 tmp_ctx = talloc_new(conn);
236 if (tmp_ctx == NULL) {
240 basedn = ldb_dn_explode(tmp_ctx, "");
241 if (basedn == NULL) {
245 ret = ldb_search(conn->ldb, basedn, LDB_SCOPE_BASE, NULL, attrs, &res);
246 talloc_steal(tmp_ctx, res);
247 if (ret != LDB_SUCCESS || res->count != 1) {
251 conf_dn_s = ldb_msg_find_string(res->msgs[0], "configurationNamingContext", NULL);
252 if (conf_dn_s == NULL) {
255 conf_dn = ldb_dn_explode(tmp_ctx, conf_dn_s);
256 if (conf_dn == NULL) {
260 policy_dn = ldb_dn_string_compose(tmp_ctx, conf_dn, "CN=Default Query Policy,CN=Query-Policies,CN=Directory Service,CN=Windows NT,CN=Services");
261 if (policy_dn == NULL) {
265 ret = ldb_search(conn->ldb, policy_dn, LDB_SCOPE_BASE, NULL, attrs2, &res);
266 talloc_steal(tmp_ctx, res);
267 if (ret != LDB_SUCCESS || res->count != 1) {
271 el = ldb_msg_find_element(res->msgs[0], "lDAPAdminLimits");
276 for (i = 0; i < el->num_values; i++) {
277 char policy_name[256];
280 s = sscanf((const char *)el->values[i].data, "%255[^=]=%d", policy_name, &policy_value);
281 if (ret != 2 || policy_value == 0)
284 if (strcasecmp("InitRecvTimeout", policy_name) == 0) {
285 conn->limits.initial_timeout = policy_value;
288 if (strcasecmp("MaxConnIdleTime", policy_name) == 0) {
289 conn->limits.conn_idle_time = policy_value;
292 if (strcasecmp("MaxPageSize", policy_name) == 0) {
293 conn->limits.max_page_size = policy_value;
296 if (strcasecmp("MaxQueryDuration", policy_name) == 0) {
297 conn->limits.search_timeout = policy_value;
305 DEBUG(0, ("Failed to load ldap server query policies\n"));
306 talloc_free(tmp_ctx);
311 initialise a server_context from a open socket and register a event handler
312 for reading from that socket
314 static void ldapsrv_accept(struct stream_connection *c)
316 struct ldapsrv_service *ldapsrv_service =
317 talloc_get_type(c->private, struct ldapsrv_service);
318 struct ldapsrv_connection *conn;
319 struct cli_credentials *server_credentials;
320 struct socket_address *socket_address;
324 conn = talloc_zero(c, struct ldapsrv_connection);
326 stream_terminate_connection(c, "ldapsrv_accept: out of memory");
331 conn->connection = c;
332 conn->service = ldapsrv_service;
333 conn->sockets.raw = c->socket;
337 socket_address = socket_get_my_addr(c->socket, conn);
338 if (!socket_address) {
339 ldapsrv_terminate_connection(conn, "ldapsrv_accept: failed to obtain local socket address!");
342 port = socket_address->port;
343 talloc_free(socket_address);
346 struct socket_context *tls_socket = tls_init_server(ldapsrv_service->tls_params, c->socket,
349 ldapsrv_terminate_connection(conn, "ldapsrv_accept: tls_init_server() failed");
352 talloc_unlink(c, c->socket);
353 talloc_steal(c, tls_socket);
354 c->socket = tls_socket;
355 conn->sockets.tls = tls_socket;
357 } else if (port == 3268) /* Global catalog */ {
358 conn->global_catalog = True;
360 conn->packet = packet_init(conn);
361 if (conn->packet == NULL) {
362 ldapsrv_terminate_connection(conn, "out of memory");
366 packet_set_private(conn->packet, conn);
367 packet_set_socket(conn->packet, c->socket);
368 packet_set_callback(conn->packet, ldapsrv_decode);
369 packet_set_full_request(conn->packet, ldap_full_packet);
370 packet_set_error_handler(conn->packet, ldapsrv_error_handler);
371 packet_set_event_context(conn->packet, c->event.ctx);
372 packet_set_fde(conn->packet, c->event.fde);
373 packet_set_serialise(conn->packet);
375 /* Ensure we don't get packets until the database is ready below */
376 packet_recv_disable(conn->packet);
379 = cli_credentials_init(conn);
380 if (!server_credentials) {
381 stream_terminate_connection(c, "Failed to init server credentials\n");
385 cli_credentials_set_conf(server_credentials);
386 status = cli_credentials_set_machine_account(server_credentials);
387 if (!NT_STATUS_IS_OK(status)) {
388 stream_terminate_connection(c, talloc_asprintf(conn, "Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(status)));
391 conn->server_credentials = server_credentials;
393 /* Connections start out anonymous */
394 if (!NT_STATUS_IS_OK(auth_anonymous_session_info(conn, &conn->session_info))) {
395 ldapsrv_terminate_connection(conn, "failed to setup anonymous session info");
399 if (!NT_STATUS_IS_OK(ldapsrv_backend_Init(conn))) {
400 ldapsrv_terminate_connection(conn, "backend Init failed");
404 /* load limits from the conf partition */
405 ldapsrv_load_limits(conn); /* should we fail on error ? */
407 /* register the server */
408 irpc_add_name(c->msg_ctx, "ldap_server");
410 /* set connections limits */
411 conn->limits.ite = event_add_timed(c->event.ctx, conn,
412 timeval_current_ofs(conn->limits.initial_timeout, 0),
413 ldapsrv_conn_init_timeout, conn);
415 packet_recv_enable(conn->packet);
419 static const struct stream_server_ops ldap_stream_ops = {
421 .accept_connection = ldapsrv_accept,
422 .recv_handler = ldapsrv_recv,
423 .send_handler = ldapsrv_send,
427 add a socket address to the list of events, one event per port
429 static NTSTATUS add_socket(struct event_context *event_context,
430 const struct model_ops *model_ops,
431 const char *address, struct ldapsrv_service *ldap_service)
436 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
437 "ipv4", address, &port, ldap_service);
438 if (!NT_STATUS_IS_OK(status)) {
439 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
440 address, port, nt_errstr(status)));
443 if (tls_support(ldap_service->tls_params)) {
444 /* add ldaps server */
446 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
447 "ipv4", address, &port, ldap_service);
448 if (!NT_STATUS_IS_OK(status)) {
449 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
450 address, port, nt_errstr(status)));
454 /* if we are a PDC, then also enable the global catalog server port, 3268 */
455 if (lp_server_role() == ROLE_DOMAIN_PDC) {
457 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
458 "ipv4", address, &port, ldap_service);
459 if (!NT_STATUS_IS_OK(status)) {
460 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
461 address, port, nt_errstr(status)));
469 open the ldap server sockets
471 static void ldapsrv_task_init(struct task_server *task)
473 struct ldapsrv_service *ldap_service;
476 task_server_set_title(task, "task[ldapsrv]");
478 ldap_service = talloc_zero(task, struct ldapsrv_service);
479 if (ldap_service == NULL) goto failed;
481 ldap_service->tls_params = tls_initialise(ldap_service);
482 if (ldap_service->tls_params == NULL) goto failed;
484 if (lp_interfaces() && lp_bind_interfaces_only()) {
485 int num_interfaces = iface_count();
488 /* We have been given an interfaces line, and been
489 told to only bind to those interfaces. Create a
490 socket per interface and bind to only these.
492 for(i = 0; i < num_interfaces; i++) {
493 const char *address = iface_n_ip(i);
494 status = add_socket(task->event_ctx, task->model_ops, address, ldap_service);
495 if (!NT_STATUS_IS_OK(status)) goto failed;
498 status = add_socket(task->event_ctx, task->model_ops, lp_socket_address(), ldap_service);
499 if (!NT_STATUS_IS_OK(status)) goto failed;
505 task_server_terminate(task, "Failed to startup ldap server task");
509 called on startup of the web server service It's job is to start
510 listening on all configured sockets
512 static NTSTATUS ldapsrv_init(struct event_context *event_context,
513 const struct model_ops *model_ops)
515 return task_server_startup(event_context, model_ops, ldapsrv_task_init);
519 NTSTATUS server_service_ldap_init(void)
521 return register_server_service("ldap", ldapsrv_init);