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 "lib/socket/socket.h"
34 #include "lib/tls/tls.h"
35 #include "lib/messaging/irpc.h"
36 #include "lib/stream/packet.h"
37 #include "lib/ldb/include/ldb.h"
38 #include "lib/ldb/include/ldb_errors.h"
39 #include "system/network.h"
40 #include "netif/netif.h"
43 close the socket and shutdown a server_context
45 static void ldapsrv_terminate_connection(struct ldapsrv_connection *conn,
49 talloc_free(conn->tls);
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;
74 BOOL enable_wrap = conn->enable_wrap;
76 call = talloc(conn, struct ldapsrv_call);
78 ldapsrv_terminate_connection(conn, "no memory");
82 call->request = talloc_steal(call, msg);
87 status = ldapsrv_do_call(call);
88 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));
109 status = data_blob_append(call, &blob, b.data, b.length);
112 if (!NT_STATUS_IS_OK(status)) goto failed;
114 DLIST_REMOVE(call->replies, call->replies);
117 /* possibly encrypt/sign the reply */
121 status = gensec_wrap(conn->gensec, call, &blob, &wrapped);
122 if (!NT_STATUS_IS_OK(status)) {
125 data_blob_free(&blob);
126 blob = data_blob_talloc(call, NULL, wrapped.length + 4);
127 if (blob.data == NULL) {
130 RSIVAL(blob.data, 0, wrapped.length);
131 memcpy(blob.data+4, wrapped.data, wrapped.length);
132 data_blob_free(&wrapped);
135 packet_send(conn->packet, blob);
145 decode the input buffer
147 static NTSTATUS ldapsrv_decode_plain(struct ldapsrv_connection *conn, DATA_BLOB blob)
149 struct asn1_data asn1;
150 struct ldap_message *msg = talloc(conn, struct ldap_message);
153 return NT_STATUS_NO_MEMORY;
156 if (!asn1_load(&asn1, blob)) {
157 return NT_STATUS_NO_MEMORY;
160 if (!ldap_decode(&asn1, msg)) {
162 return NT_STATUS_LDAP(LDAP_PROTOCOL_ERROR);
165 data_blob_free(&blob);
166 ldapsrv_process_message(conn, msg);
173 decode/process wrapped data
175 static NTSTATUS ldapsrv_decode_wrapped(struct ldapsrv_connection *conn,
178 DATA_BLOB wrapped, unwrapped;
179 struct asn1_data asn1;
180 struct ldap_message *msg = talloc(conn, struct ldap_message);
184 return NT_STATUS_NO_MEMORY;
187 wrapped = data_blob_const(blob.data+4, blob.length-4);
189 status = gensec_unwrap(conn->gensec, msg, &wrapped, &unwrapped);
190 if (!NT_STATUS_IS_OK(status)) {
191 return NT_STATUS_LDAP(LDAP_PROTOCOL_ERROR);
194 data_blob_free(&blob);
196 if (!asn1_load(&asn1, unwrapped)) {
197 return NT_STATUS_LDAP(LDAP_PROTOCOL_ERROR);
200 while (ldap_decode(&asn1, msg)) {
201 ldapsrv_process_message(conn, msg);
202 msg = talloc(conn, struct ldap_message);
205 if (asn1.ofs < asn1.length) {
206 return NT_STATUS_LDAP(LDAP_PROTOCOL_ERROR);
218 static NTSTATUS ldapsrv_decode(void *private, DATA_BLOB blob)
220 struct ldapsrv_connection *conn = talloc_get_type(private,
221 struct ldapsrv_connection);
222 if (conn->enable_wrap) {
223 return ldapsrv_decode_wrapped(conn, blob);
225 return ldapsrv_decode_plain(conn, blob);
231 static void ldapsrv_conn_idle_timeout(struct event_context *ev,
232 struct timed_event *te,
236 struct ldapsrv_connection *conn = talloc_get_type(private, struct ldapsrv_connection);
238 ldapsrv_terminate_connection(conn, "Timeout. No requests after bind");
242 called when a LDAP socket becomes readable
244 static void ldapsrv_recv(struct stream_connection *c, uint16_t flags)
246 struct ldapsrv_connection *conn =
247 talloc_get_type(c->private, struct ldapsrv_connection);
249 if (conn->limits.ite) { /* clean initial timeout if any */
250 talloc_free(conn->limits.ite);
251 conn->limits.ite = NULL;
254 if (conn->limits.te) { /* clean idle timeout if any */
255 talloc_free(conn->limits.te);
256 conn->limits.te = NULL;
259 packet_recv(conn->packet);
261 /* set idle timeout */
262 conn->limits.te = event_add_timed(c->event.ctx, conn,
263 timeval_current_ofs(conn->limits.conn_idle_time, 0),
264 ldapsrv_conn_idle_timeout, conn);
268 check if a blob is a complete ldap packet
269 handle wrapper or unwrapped connections
271 NTSTATUS ldapsrv_complete_packet(void *private, DATA_BLOB blob, size_t *size)
273 struct ldapsrv_connection *conn = talloc_get_type(private,
274 struct ldapsrv_connection);
275 if (conn->enable_wrap) {
276 return packet_full_request_u32(private, blob, size);
278 return ldap_full_packet(private, blob, size);
282 called when a LDAP socket becomes writable
284 static void ldapsrv_send(struct stream_connection *c, uint16_t flags)
286 struct ldapsrv_connection *conn =
287 talloc_get_type(c->private, struct ldapsrv_connection);
289 packet_queue_run(conn->packet);
292 static void ldapsrv_conn_init_timeout(struct event_context *ev,
293 struct timed_event *te,
297 struct ldapsrv_connection *conn = talloc_get_type(private, struct ldapsrv_connection);
299 ldapsrv_terminate_connection(conn, "Timeout. No requests after initial connection");
302 static int ldapsrv_load_limits(struct ldapsrv_connection *conn)
305 const char *attrs[] = { "configurationNamingContext", NULL };
306 const char *attrs2[] = { "lDAPAdminLimits", NULL };
307 const char *conf_dn_s;
308 struct ldb_message_element *el;
309 struct ldb_result *res = NULL;
310 struct ldb_dn *basedn;
311 struct ldb_dn *conf_dn;
312 struct ldb_dn *policy_dn;
315 /* set defaults limits in case of failure */
316 conn->limits.initial_timeout = 120;
317 conn->limits.conn_idle_time = 900;
318 conn->limits.max_page_size = 1000;
319 conn->limits.search_timeout = 120;
322 tmp_ctx = talloc_new(conn);
323 if (tmp_ctx == NULL) {
327 basedn = ldb_dn_explode(tmp_ctx, "");
328 if (basedn == NULL) {
332 ret = ldb_search(conn->ldb, basedn, LDB_SCOPE_BASE, NULL, attrs, &res);
333 talloc_steal(tmp_ctx, res);
334 if (ret != LDB_SUCCESS || res->count != 1) {
338 conf_dn_s = ldb_msg_find_string(res->msgs[0], "configurationNamingContext", NULL);
339 if (conf_dn_s == NULL) {
342 conf_dn = ldb_dn_explode(tmp_ctx, conf_dn_s);
343 if (conf_dn == NULL) {
347 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");
348 if (policy_dn == NULL) {
352 ret = ldb_search(conn->ldb, policy_dn, LDB_SCOPE_BASE, NULL, attrs2, &res);
353 talloc_steal(tmp_ctx, res);
354 if (ret != LDB_SUCCESS || res->count != 1) {
358 el = ldb_msg_find_element(res->msgs[0], "lDAPAdminLimits");
363 for (i = 0; i < el->num_values; i++) {
364 char policy_name[256];
367 s = sscanf((const char *)el->values[i].data, "%255[^=]=%d", policy_name, &policy_value);
368 if (ret != 2 || policy_value == 0)
371 if (strcasecmp("InitRecvTimeout", policy_name) == 0) {
372 conn->limits.initial_timeout = policy_value;
375 if (strcasecmp("MaxConnIdleTime", policy_name) == 0) {
376 conn->limits.conn_idle_time = policy_value;
379 if (strcasecmp("MaxPageSize", policy_name) == 0) {
380 conn->limits.max_page_size = policy_value;
383 if (strcasecmp("MaxQueryDuration", policy_name) == 0) {
384 conn->limits.search_timeout = policy_value;
392 DEBUG(0, ("Failed to load ldap server query policies\n"));
393 talloc_free(tmp_ctx);
398 initialise a server_context from a open socket and register a event handler
399 for reading from that socket
401 static void ldapsrv_accept(struct stream_connection *c)
403 struct ldapsrv_service *ldapsrv_service =
404 talloc_get_type(c->private, struct ldapsrv_service);
405 struct ldapsrv_connection *conn;
406 struct cli_credentials *server_credentials;
407 struct socket_address *socket_address;
411 conn = talloc_zero(c, struct ldapsrv_connection);
413 stream_terminate_connection(c, "ldapsrv_accept: out of memory");
417 conn->enable_wrap = False;
419 conn->connection = c;
420 conn->service = ldapsrv_service;
423 = cli_credentials_init(conn);
424 if (!server_credentials) {
425 stream_terminate_connection(c, "Failed to init server credentials\n");
430 cli_credentials_set_conf(server_credentials);
431 status = cli_credentials_set_machine_account(server_credentials);
432 if (!NT_STATUS_IS_OK(status)) {
433 stream_terminate_connection(c, talloc_asprintf(conn, "Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(status)));
437 conn->server_credentials = server_credentials;
441 socket_address = socket_get_my_addr(c->socket, conn);
442 if (!socket_address) {
443 ldapsrv_terminate_connection(conn, "ldapsrv_accept: failed to obtain local socket address!");
446 port = socket_address->port;
447 talloc_free(socket_address);
449 conn->tls = tls_init_server(ldapsrv_service->tls_params, c->socket,
450 c->event.fde, NULL, port != 389);
452 ldapsrv_terminate_connection(conn, "ldapsrv_accept: tls_init_server() failed");
456 conn->packet = packet_init(conn);
457 if (conn->packet == NULL) {
458 ldapsrv_terminate_connection(conn, "out of memory");
461 packet_set_private(conn->packet, conn);
462 packet_set_tls(conn->packet, conn->tls);
463 packet_set_callback(conn->packet, ldapsrv_decode);
464 packet_set_full_request(conn->packet, ldapsrv_complete_packet);
465 packet_set_error_handler(conn->packet, ldapsrv_error_handler);
466 packet_set_event_context(conn->packet, c->event.ctx);
467 packet_set_fde(conn->packet, c->event.fde);
468 packet_set_serialise(conn->packet);
470 /* Connections start out anonymous */
471 if (!NT_STATUS_IS_OK(auth_anonymous_session_info(conn, &conn->session_info))) {
472 ldapsrv_terminate_connection(conn, "failed to setup anonymous session info");
476 if (!NT_STATUS_IS_OK(ldapsrv_backend_Init(conn))) {
477 ldapsrv_terminate_connection(conn, "backend Init failed");
481 /* load limits from the conf partition */
482 ldapsrv_load_limits(conn); /* should we fail on error ? */
484 /* register the server */
485 irpc_add_name(c->msg_ctx, "ldap_server");
487 /* set connections limits */
488 conn->limits.ite = event_add_timed(c->event.ctx, conn,
489 timeval_current_ofs(conn->limits.initial_timeout, 0),
490 ldapsrv_conn_init_timeout, conn);
493 static const struct stream_server_ops ldap_stream_ops = {
495 .accept_connection = ldapsrv_accept,
496 .recv_handler = ldapsrv_recv,
497 .send_handler = ldapsrv_send,
501 add a socket address to the list of events, one event per port
503 static NTSTATUS add_socket(struct event_context *event_context,
504 const struct model_ops *model_ops,
505 const char *address, struct ldapsrv_service *ldap_service)
510 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
511 "ipv4", address, &port, ldap_service);
512 if (!NT_STATUS_IS_OK(status)) {
513 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
514 address, port, nt_errstr(status)));
517 if (tls_support(ldap_service->tls_params)) {
518 /* add ldaps server */
520 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
521 "ipv4", address, &port, ldap_service);
522 if (!NT_STATUS_IS_OK(status)) {
523 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
524 address, port, nt_errstr(status)));
528 /* if we are a PDC, then also enable the global catalog server port, 3268 */
529 if (lp_server_role() == ROLE_DOMAIN_PDC) {
531 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops,
532 "ipv4", address, &port, ldap_service);
533 if (!NT_STATUS_IS_OK(status)) {
534 DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
535 address, port, nt_errstr(status)));
543 open the ldap server sockets
545 static void ldapsrv_task_init(struct task_server *task)
547 struct ldapsrv_service *ldap_service;
552 ldap_service = talloc_zero(task, struct ldapsrv_service);
553 if (ldap_service == NULL) goto failed;
555 ldap_service->tls_params = tls_initialise(ldap_service);
556 if (ldap_service->tls_params == NULL) goto failed;
558 if (lp_interfaces() && lp_bind_interfaces_only()) {
559 int num_interfaces = iface_count();
562 /* We have been given an interfaces line, and been
563 told to only bind to those interfaces. Create a
564 socket per interface and bind to only these.
566 for(i = 0; i < num_interfaces; i++) {
567 const char *address = iface_n_ip(i);
568 status = add_socket(task->event_ctx, task->model_ops, address, ldap_service);
569 if (!NT_STATUS_IS_OK(status)) goto failed;
572 status = add_socket(task->event_ctx, task->model_ops, lp_socket_address(), ldap_service);
573 if (!NT_STATUS_IS_OK(status)) goto failed;
579 task_server_terminate(task, "Failed to startup ldap server task");
583 called on startup of the web server service It's job is to start
584 listening on all configured sockets
586 static NTSTATUS ldapsrv_init(struct event_context *event_context,
587 const struct model_ops *model_ops)
589 return task_server_startup(event_context, model_ops, ldapsrv_task_init);
593 NTSTATUS server_service_ldap_init(void)
595 return register_server_service("ldap", ldapsrv_init);