2 Unix SMB/CIFS implementation.
6 Copyright (C) 2010 Kai Blin <kai@samba.org>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "smbd/service_task.h"
24 #include "smbd/service.h"
25 #include "smbd/service_stream.h"
26 #include "smbd/process_model.h"
27 #include "lib/events/events.h"
28 #include "lib/socket/socket.h"
29 #include "lib/tsocket/tsocket.h"
30 #include "libcli/util/tstream.h"
31 #include "libcli/util/ntstatus.h"
32 #include "system/network.h"
33 #include "lib/stream/packet.h"
34 #include "lib/socket/netif.h"
35 #include "dns_server/dns_server.h"
36 #include "param/param.h"
37 #include "librpc/ndr/libndr.h"
38 #include "librpc/gen_ndr/ndr_dns.h"
39 #include "librpc/gen_ndr/ndr_dnsp.h"
41 #include "dsdb/samdb/samdb.h"
42 #include "dsdb/common/util.h"
43 #include "auth/session.h"
44 #include "lib/util/dlinklist.h"
45 #include "lib/util/tevent_werror.h"
46 #include "auth/auth.h"
47 #include "auth/credentials/credentials.h"
48 #include "librpc/gen_ndr/ndr_irpc.h"
49 #include "lib/messaging/irpc.h"
52 #define DBGC_CLASS DBGC_DNS
54 NTSTATUS server_service_dns_init(void);
56 /* hold information about one dns socket */
58 struct dns_server *dns;
59 struct tsocket_address *local_address;
62 struct dns_udp_socket {
63 struct dns_socket *dns_socket;
64 struct tdgram_context *dgram;
65 struct tevent_queue *send_queue;
69 state of an open tcp connection
71 struct dns_tcp_connection {
72 /* stream connection we belong to */
73 struct stream_connection *conn;
75 /* the dns_server the connection belongs to */
76 struct dns_socket *dns_socket;
78 struct tstream_context *tstream;
80 struct tevent_queue *send_queue;
83 static void dns_tcp_terminate_connection(struct dns_tcp_connection *dnsconn, const char *reason)
85 stream_terminate_connection(dnsconn->conn, reason);
88 static void dns_tcp_recv(struct stream_connection *conn, uint16_t flags)
90 struct dns_tcp_connection *dnsconn = talloc_get_type(conn->private_data,
91 struct dns_tcp_connection);
92 /* this should never be triggered! */
93 dns_tcp_terminate_connection(dnsconn, "dns_tcp_recv: called");
96 static void dns_tcp_send(struct stream_connection *conn, uint16_t flags)
98 struct dns_tcp_connection *dnsconn = talloc_get_type(conn->private_data,
99 struct dns_tcp_connection);
100 /* this should never be triggered! */
101 dns_tcp_terminate_connection(dnsconn, "dns_tcp_send: called");
104 struct dns_process_state {
106 struct dns_server *dns;
107 struct dns_name_packet in_packet;
108 struct dns_request_state state;
110 struct dns_name_packet out_packet;
114 static void dns_process_done(struct tevent_req *subreq);
116 static struct tevent_req *dns_process_send(TALLOC_CTX *mem_ctx,
117 struct tevent_context *ev,
118 struct dns_server *dns,
121 struct tevent_req *req, *subreq;
122 struct dns_process_state *state;
123 enum ndr_err_code ndr_err;
125 const char *forwarder = lpcfg_dns_forwarder(dns->task->lp_ctx);
126 req = tevent_req_create(mem_ctx, &state, struct dns_process_state);
130 state->state.mem_ctx = state;
135 if (in->length < 12) {
136 tevent_req_werror(req, WERR_INVALID_PARAM);
137 return tevent_req_post(req, ev);
139 dump_data_dbgc(DBGC_DNS, 8, in->data, in->length);
141 ndr_err = ndr_pull_struct_blob(
142 in, state, &state->in_packet,
143 (ndr_pull_flags_fn_t)ndr_pull_dns_name_packet);
145 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
146 state->dns_err = DNS_RCODE_FORMERR;
147 tevent_req_done(req);
148 return tevent_req_post(req, ev);
150 if (DEBUGLVLC(DBGC_DNS, 8)) {
151 NDR_PRINT_DEBUGC(DBGC_DNS, dns_name_packet, &state->in_packet);
154 ret = dns_verify_tsig(dns, state, &state->state, &state->in_packet, in);
155 if (!W_ERROR_IS_OK(ret)) {
156 DEBUG(1, ("Failed to verify TSIG!\n"));
157 state->dns_err = werr_to_dns_err(ret);
158 tevent_req_done(req);
159 return tevent_req_post(req, ev);
162 if (state->in_packet.operation & DNS_FLAG_REPLY) {
163 DEBUG(1, ("Won't reply to replies.\n"));
164 tevent_req_werror(req, WERR_INVALID_PARAM);
165 return tevent_req_post(req, ev);
168 state->state.flags = state->in_packet.operation;
169 state->state.flags |= DNS_FLAG_REPLY;
172 if (forwarder && *forwarder) {
173 state->state.flags |= DNS_FLAG_RECURSION_AVAIL;
176 state->out_packet = state->in_packet;
178 switch (state->in_packet.operation & DNS_OPCODE) {
179 case DNS_OPCODE_QUERY:
180 subreq = dns_server_process_query_send(
181 state, ev, dns, &state->state, &state->in_packet);
182 if (tevent_req_nomem(subreq, req)) {
183 return tevent_req_post(req, ev);
185 tevent_req_set_callback(subreq, dns_process_done, req);
187 case DNS_OPCODE_UPDATE:
188 ret = dns_server_process_update(
189 dns, &state->state, state, &state->in_packet,
190 &state->out_packet.answers, &state->out_packet.ancount,
191 &state->out_packet.nsrecs, &state->out_packet.nscount,
192 &state->out_packet.additional,
193 &state->out_packet.arcount);
196 ret = WERR_DNS_ERROR_RCODE_NOT_IMPLEMENTED;
198 if (!W_ERROR_IS_OK(ret)) {
199 state->dns_err = werr_to_dns_err(ret);
201 tevent_req_done(req);
202 return tevent_req_post(req, ev);
205 static void dns_process_done(struct tevent_req *subreq)
207 struct tevent_req *req = tevent_req_callback_data(
208 subreq, struct tevent_req);
209 struct dns_process_state *state = tevent_req_data(
210 req, struct dns_process_state);
213 ret = dns_server_process_query_recv(
215 &state->out_packet.answers, &state->out_packet.ancount,
216 &state->out_packet.nsrecs, &state->out_packet.nscount,
217 &state->out_packet.additional, &state->out_packet.arcount);
220 if (!W_ERROR_IS_OK(ret)) {
221 state->dns_err = werr_to_dns_err(ret);
223 tevent_req_done(req);
226 static WERROR dns_process_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
229 struct dns_process_state *state = tevent_req_data(
230 req, struct dns_process_state);
231 enum ndr_err_code ndr_err;
234 if (tevent_req_is_werror(req, &ret)) {
237 if ((state->dns_err != DNS_RCODE_OK) &&
238 (state->dns_err != DNS_RCODE_NXDOMAIN)) {
241 if (state->dns_err != DNS_RCODE_OK) {
242 state->out_packet.operation |= state->dns_err;
244 state->out_packet.operation |= state->state.flags;
246 if (state->state.sign) {
247 ret = dns_sign_tsig(state->dns, mem_ctx, &state->state,
248 &state->out_packet, 0);
249 if (!W_ERROR_IS_OK(ret)) {
250 state->dns_err = DNS_RCODE_SERVFAIL;
255 if (DEBUGLVLC(DBGC_DNS, 8)) {
256 NDR_PRINT_DEBUGC(DBGC_DNS, dns_name_packet, &state->out_packet);
259 ndr_err = ndr_push_struct_blob(
260 out, mem_ctx, &state->out_packet,
261 (ndr_push_flags_fn_t)ndr_push_dns_name_packet);
262 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
263 DEBUG(1, ("Failed to push packet: %s!\n",
264 ndr_errstr(ndr_err)));
265 state->dns_err = DNS_RCODE_SERVFAIL;
271 *out = data_blob_talloc(mem_ctx, state->in->data, state->in->length);
272 if (out->data == NULL) {
275 out->data[2] |= 0x80; /* Toggle DNS_FLAG_REPLY */
276 out->data[3] |= state->dns_err;
280 struct dns_tcp_call {
281 struct dns_tcp_connection *dns_conn;
285 struct iovec out_iov[2];
288 static void dns_tcp_call_process_done(struct tevent_req *subreq);
289 static void dns_tcp_call_writev_done(struct tevent_req *subreq);
291 static void dns_tcp_call_loop(struct tevent_req *subreq)
293 struct dns_tcp_connection *dns_conn = tevent_req_callback_data(subreq,
294 struct dns_tcp_connection);
295 struct dns_server *dns = dns_conn->dns_socket->dns;
296 struct dns_tcp_call *call;
299 call = talloc(dns_conn, struct dns_tcp_call);
301 dns_tcp_terminate_connection(dns_conn, "dns_tcp_call_loop: "
302 "no memory for dns_tcp_call");
305 call->dns_conn = dns_conn;
307 status = tstream_read_pdu_blob_recv(subreq,
311 if (!NT_STATUS_IS_OK(status)) {
314 reason = talloc_asprintf(call, "dns_tcp_call_loop: "
315 "tstream_read_pdu_blob_recv() - %s",
318 reason = nt_errstr(status);
321 dns_tcp_terminate_connection(dns_conn, reason);
325 DEBUG(10,("Received DNS TCP packet of length %lu from %s\n",
326 (long) call->in.length,
327 tsocket_address_string(dns_conn->conn->remote_address, call)));
329 /* skip length header */
331 call->in.length -= 2;
333 subreq = dns_process_send(call, dns->task->event_ctx, dns,
335 if (subreq == NULL) {
336 dns_tcp_terminate_connection(
337 dns_conn, "dns_tcp_call_loop: dns_process_send "
341 tevent_req_set_callback(subreq, dns_tcp_call_process_done, call);
344 * The dns tcp pdu's has the length as 2 byte (initial_read_size),
345 * packet_full_request_u16 provides the pdu length then.
347 subreq = tstream_read_pdu_blob_send(dns_conn,
348 dns_conn->conn->event.ctx,
350 2, /* initial_read_size */
351 packet_full_request_u16,
353 if (subreq == NULL) {
354 dns_tcp_terminate_connection(dns_conn, "dns_tcp_call_loop: "
355 "no memory for tstream_read_pdu_blob_send");
358 tevent_req_set_callback(subreq, dns_tcp_call_loop, dns_conn);
361 static void dns_tcp_call_process_done(struct tevent_req *subreq)
363 struct dns_tcp_call *call = tevent_req_callback_data(subreq,
364 struct dns_tcp_call);
365 struct dns_tcp_connection *dns_conn = call->dns_conn;
368 err = dns_process_recv(subreq, call, &call->out);
370 if (!W_ERROR_IS_OK(err)) {
371 DEBUG(1, ("dns_process returned %s\n", win_errstr(err)));
372 dns_tcp_terminate_connection(dns_conn,
373 "dns_tcp_call_loop: process function failed");
377 /* First add the length of the out buffer */
378 RSSVAL(call->out_hdr, 0, call->out.length);
379 call->out_iov[0].iov_base = (char *) call->out_hdr;
380 call->out_iov[0].iov_len = 2;
382 call->out_iov[1].iov_base = (char *) call->out.data;
383 call->out_iov[1].iov_len = call->out.length;
385 subreq = tstream_writev_queue_send(call,
386 dns_conn->conn->event.ctx,
388 dns_conn->send_queue,
390 if (subreq == NULL) {
391 dns_tcp_terminate_connection(dns_conn, "dns_tcp_call_loop: "
392 "no memory for tstream_writev_queue_send");
395 tevent_req_set_callback(subreq, dns_tcp_call_writev_done, call);
398 static void dns_tcp_call_writev_done(struct tevent_req *subreq)
400 struct dns_tcp_call *call = tevent_req_callback_data(subreq,
401 struct dns_tcp_call);
405 rc = tstream_writev_queue_recv(subreq, &sys_errno);
410 reason = talloc_asprintf(call, "dns_tcp_call_writev_done: "
411 "tstream_writev_queue_recv() - %d:%s",
412 sys_errno, strerror(sys_errno));
414 reason = "dns_tcp_call_writev_done: tstream_writev_queue_recv() failed";
417 dns_tcp_terminate_connection(call->dns_conn, reason);
421 /* We don't care about errors */
427 called when we get a new connection
429 static void dns_tcp_accept(struct stream_connection *conn)
431 struct dns_socket *dns_socket;
432 struct dns_tcp_connection *dns_conn;
433 struct tevent_req *subreq;
436 dns_conn = talloc_zero(conn, struct dns_tcp_connection);
437 if (dns_conn == NULL) {
438 stream_terminate_connection(conn,
439 "dns_tcp_accept: out of memory");
443 dns_conn->send_queue = tevent_queue_create(conn, "dns_tcp_accept");
444 if (dns_conn->send_queue == NULL) {
445 stream_terminate_connection(conn,
446 "dns_tcp_accept: out of memory");
450 dns_socket = talloc_get_type(conn->private_data, struct dns_socket);
452 TALLOC_FREE(conn->event.fde);
454 rc = tstream_bsd_existing_socket(dns_conn,
455 socket_get_fd(conn->socket),
458 stream_terminate_connection(conn,
459 "dns_tcp_accept: out of memory");
463 dns_conn->conn = conn;
464 dns_conn->dns_socket = dns_socket;
465 conn->private_data = dns_conn;
468 * The dns tcp pdu's has the length as 2 byte (initial_read_size),
469 * packet_full_request_u16 provides the pdu length then.
471 subreq = tstream_read_pdu_blob_send(dns_conn,
472 dns_conn->conn->event.ctx,
474 2, /* initial_read_size */
475 packet_full_request_u16,
477 if (subreq == NULL) {
478 dns_tcp_terminate_connection(dns_conn, "dns_tcp_accept: "
479 "no memory for tstream_read_pdu_blob_send");
482 tevent_req_set_callback(subreq, dns_tcp_call_loop, dns_conn);
485 static const struct stream_server_ops dns_tcp_stream_ops = {
487 .accept_connection = dns_tcp_accept,
488 .recv_handler = dns_tcp_recv,
489 .send_handler = dns_tcp_send
492 struct dns_udp_call {
493 struct dns_udp_socket *sock;
494 struct tsocket_address *src;
499 static void dns_udp_call_process_done(struct tevent_req *subreq);
500 static void dns_udp_call_sendto_done(struct tevent_req *subreq);
502 static void dns_udp_call_loop(struct tevent_req *subreq)
504 struct dns_udp_socket *sock = tevent_req_callback_data(subreq,
505 struct dns_udp_socket);
506 struct dns_server *dns = sock->dns_socket->dns;
507 struct dns_udp_call *call;
512 call = talloc(sock, struct dns_udp_call);
519 len = tdgram_recvfrom_recv(subreq, &sys_errno,
520 call, &buf, &call->src);
528 call->in.length = len;
530 DEBUG(10,("Received DNS UDP packet of length %lu from %s\n",
531 (long)call->in.length,
532 tsocket_address_string(call->src, call)));
534 subreq = dns_process_send(call, dns->task->event_ctx, dns,
536 if (subreq == NULL) {
540 tevent_req_set_callback(subreq, dns_udp_call_process_done, call);
543 subreq = tdgram_recvfrom_send(sock,
544 sock->dns_socket->dns->task->event_ctx,
546 if (subreq == NULL) {
547 task_server_terminate(sock->dns_socket->dns->task,
548 "no memory for tdgram_recvfrom_send",
552 tevent_req_set_callback(subreq, dns_udp_call_loop, sock);
555 static void dns_udp_call_process_done(struct tevent_req *subreq)
557 struct dns_udp_call *call = tevent_req_callback_data(
558 subreq, struct dns_udp_call);
559 struct dns_udp_socket *sock = call->sock;
560 struct dns_server *dns = sock->dns_socket->dns;
563 err = dns_process_recv(subreq, call, &call->out);
565 if (!W_ERROR_IS_OK(err)) {
566 DEBUG(1, ("dns_process returned %s\n", win_errstr(err)));
571 subreq = tdgram_sendto_queue_send(call,
572 dns->task->event_ctx,
578 if (subreq == NULL) {
582 tevent_req_set_callback(subreq, dns_udp_call_sendto_done, call);
585 static void dns_udp_call_sendto_done(struct tevent_req *subreq)
587 struct dns_udp_call *call = tevent_req_callback_data(subreq,
588 struct dns_udp_call);
591 tdgram_sendto_queue_recv(subreq, &sys_errno);
593 /* We don't care about errors */
599 start listening on the given address
601 static NTSTATUS dns_add_socket(struct dns_server *dns,
602 const struct model_ops *model_ops,
607 struct dns_socket *dns_socket;
608 struct dns_udp_socket *dns_udp_socket;
609 struct tevent_req *udpsubreq;
613 dns_socket = talloc(dns, struct dns_socket);
614 NT_STATUS_HAVE_NO_MEMORY(dns_socket);
616 dns_socket->dns = dns;
618 ret = tsocket_address_inet_from_strings(dns_socket, "ip",
620 &dns_socket->local_address);
622 status = map_nt_error_from_unix_common(errno);
626 status = stream_setup_socket(dns->task,
627 dns->task->event_ctx,
631 "ip", address, &port,
632 lpcfg_socket_options(dns->task->lp_ctx),
634 if (!NT_STATUS_IS_OK(status)) {
635 DEBUG(0,("Failed to bind to %s:%u TCP - %s\n",
636 address, port, nt_errstr(status)));
637 talloc_free(dns_socket);
641 dns_udp_socket = talloc(dns_socket, struct dns_udp_socket);
642 NT_STATUS_HAVE_NO_MEMORY(dns_udp_socket);
644 dns_udp_socket->dns_socket = dns_socket;
646 ret = tdgram_inet_udp_socket(dns_socket->local_address,
649 &dns_udp_socket->dgram);
651 status = map_nt_error_from_unix_common(errno);
652 DEBUG(0,("Failed to bind to %s:%u UDP - %s\n",
653 address, port, nt_errstr(status)));
657 dns_udp_socket->send_queue = tevent_queue_create(dns_udp_socket,
658 "dns_udp_send_queue");
659 NT_STATUS_HAVE_NO_MEMORY(dns_udp_socket->send_queue);
661 udpsubreq = tdgram_recvfrom_send(dns_udp_socket,
662 dns->task->event_ctx,
663 dns_udp_socket->dgram);
664 NT_STATUS_HAVE_NO_MEMORY(udpsubreq);
665 tevent_req_set_callback(udpsubreq, dns_udp_call_loop, dns_udp_socket);
671 setup our listening sockets on the configured network interfaces
673 static NTSTATUS dns_startup_interfaces(struct dns_server *dns,
674 struct interface *ifaces)
676 const struct model_ops *model_ops;
678 TALLOC_CTX *tmp_ctx = talloc_new(dns);
682 /* within the dns task we want to be a single process, so
683 ask for the single process model ops and pass these to the
684 stream_setup_socket() call. */
685 model_ops = process_model_startup("single");
687 DEBUG(0,("Can't find 'single' process model_ops\n"));
688 return NT_STATUS_INTERNAL_ERROR;
691 if (ifaces != NULL) {
692 num_interfaces = iface_list_count(ifaces);
694 for (i=0; i<num_interfaces; i++) {
695 const char *address = talloc_strdup(tmp_ctx,
696 iface_list_n_ip(ifaces, i));
698 status = dns_add_socket(dns, model_ops, "dns", address,
700 NT_STATUS_NOT_OK_RETURN(status);
705 wcard = iface_list_wildcard(tmp_ctx);
707 DEBUG(0, ("No wildcard address available\n"));
708 return NT_STATUS_INTERNAL_ERROR;
710 for (i = 0; wcard[i] != NULL; i++) {
711 status = dns_add_socket(dns, model_ops, "dns", wcard[i],
713 if (NT_STATUS_IS_OK(status)) {
717 if (num_binds == 0) {
718 talloc_free(tmp_ctx);
719 return NT_STATUS_INVALID_PARAMETER_MIX;
723 talloc_free(tmp_ctx);
728 static struct dns_server_tkey_store *tkey_store_init(TALLOC_CTX *mem_ctx,
731 struct dns_server_tkey_store *buffer = talloc_zero(mem_ctx,
732 struct dns_server_tkey_store);
734 if (buffer == NULL) {
739 buffer->next_idx = 0;
741 buffer->tkeys = talloc_zero_array(buffer, struct dns_server_tkey *, size);
742 if (buffer->tkeys == NULL) {
749 static NTSTATUS dns_server_reload_zones(struct dns_server *dns)
752 struct dns_server_zone *new_list = NULL;
753 struct dns_server_zone *old_list = NULL;
754 struct dns_server_zone *old_zone;
755 status = dns_common_zones(dns->samdb, dns, &new_list);
756 if (!NT_STATUS_IS_OK(status)) {
759 dns->zones = new_list;
760 while ((old_zone = DLIST_TAIL(old_list)) != NULL) {
761 DLIST_REMOVE(old_list, old_zone);
762 talloc_free(old_zone);
769 * Called when the internal DNS server should reload the zones from DB, for
770 * example, when zones are added or deleted through RPC or replicated by
773 static NTSTATUS dns_reload_zones(struct irpc_message *msg,
774 struct dnssrv_reload_dns_zones *r)
776 struct dns_server *dns;
778 dns = talloc_get_type(msg->private_data, struct dns_server);
780 r->out.result = NT_STATUS_INTERNAL_ERROR;
781 return NT_STATUS_INTERNAL_ERROR;
784 r->out.result = dns_server_reload_zones(dns);
789 static void dns_task_init(struct task_server *task)
791 struct dns_server *dns;
793 struct interface *ifaces = NULL;
795 static const char * const attrs_none[] = { NULL};
796 struct ldb_message *dns_acc;
797 char *hostname_lower;
800 switch (lpcfg_server_role(task->lp_ctx)) {
801 case ROLE_STANDALONE:
802 task_server_terminate(task, "dns: no DNS required in standalone configuration", false);
804 case ROLE_DOMAIN_MEMBER:
805 task_server_terminate(task, "dns: no DNS required in member server configuration", false);
807 case ROLE_ACTIVE_DIRECTORY_DC:
808 /* Yes, we want a DNS */
812 if (lpcfg_interfaces(task->lp_ctx) && lpcfg_bind_interfaces_only(task->lp_ctx)) {
813 load_interface_list(task, task->lp_ctx, &ifaces);
815 if (iface_list_count(ifaces) == 0) {
816 task_server_terminate(task, "dns: no network interfaces configured", false);
821 task_server_set_title(task, "task[dns]");
823 dns = talloc_zero(task, struct dns_server);
825 task_server_terminate(task, "dns: out of memory", true);
830 /*FIXME: Make this a configurable option */
831 dns->max_payload = 4096;
833 dns->server_credentials = cli_credentials_init(dns);
834 if (!dns->server_credentials) {
835 task_server_terminate(task, "Failed to init server credentials\n", true);
839 dns->samdb = samdb_connect(dns, dns->task->event_ctx, dns->task->lp_ctx,
840 system_session(dns->task->lp_ctx), 0);
842 task_server_terminate(task, "dns: samdb_connect failed", true);
846 cli_credentials_set_conf(dns->server_credentials, task->lp_ctx);
848 hostname_lower = strlower_talloc(dns, lpcfg_netbios_name(task->lp_ctx));
849 dns_spn = talloc_asprintf(dns, "DNS/%s.%s",
851 lpcfg_dnsdomain(task->lp_ctx));
852 TALLOC_FREE(hostname_lower);
854 ret = dsdb_search_one(dns->samdb, dns, &dns_acc,
855 ldb_get_default_basedn(dns->samdb), LDB_SCOPE_SUBTREE,
856 attrs_none, 0, "(servicePrincipalName=%s)",
858 if (ret == LDB_SUCCESS) {
859 TALLOC_FREE(dns_acc);
861 task_server_terminate(task, "dns: talloc_asprintf failed", true);
864 status = cli_credentials_set_stored_principal(dns->server_credentials, task->lp_ctx, dns_spn);
865 if (!NT_STATUS_IS_OK(status)) {
866 task_server_terminate(task,
867 talloc_asprintf(task, "Failed to obtain server credentials for DNS, "
868 "despite finding it in the samdb! %s\n",
874 TALLOC_FREE(dns_spn);
875 status = cli_credentials_set_machine_account(dns->server_credentials, task->lp_ctx);
876 if (!NT_STATUS_IS_OK(status)) {
877 task_server_terminate(task,
878 talloc_asprintf(task, "Failed to obtain server credentials, perhaps a standalone server?: %s\n",
885 dns->tkeys = tkey_store_init(dns, TKEY_BUFFER_SIZE);
887 task_server_terminate(task, "Failed to allocate tkey storage\n", true);
891 status = dns_server_reload_zones(dns);
892 if (!NT_STATUS_IS_OK(status)) {
893 task_server_terminate(task, "dns: failed to load DNS zones", true);
897 status = dns_startup_interfaces(dns, ifaces);
898 if (!NT_STATUS_IS_OK(status)) {
899 task_server_terminate(task, "dns failed to setup interfaces", true);
903 /* Setup the IRPC interface and register handlers */
904 status = irpc_add_name(task->msg_ctx, "dnssrv");
905 if (!NT_STATUS_IS_OK(status)) {
906 task_server_terminate(task, "dns: failed to register IRPC name", true);
910 status = IRPC_REGISTER(task->msg_ctx, irpc, DNSSRV_RELOAD_DNS_ZONES,
911 dns_reload_zones, dns);
912 if (!NT_STATUS_IS_OK(status)) {
913 task_server_terminate(task, "dns: failed to setup reload handler", true);
918 NTSTATUS server_service_dns_init(void)
920 return register_server_service("dns", dns_task_init);