#include "lib/socket/socket.h"
#include "lib/tsocket/tsocket.h"
#include "libcli/util/tstream.h"
+#include "libcli/util/ntstatus.h"
#include "system/network.h"
#include "lib/stream/packet.h"
#include "lib/socket/netif.h"
#include "param/param.h"
#include "librpc/ndr/libndr.h"
#include "librpc/gen_ndr/ndr_dns.h"
+#include "librpc/gen_ndr/ndr_dnsp.h"
+#include <ldb.h>
+#include "dsdb/samdb/samdb.h"
+#include "dsdb/common/util.h"
+#include "auth/session.h"
+#include "lib/util/dlinklist.h"
+#include "lib/util/tevent_werror.h"
+#include "auth/auth.h"
+#include "auth/credentials/credentials.h"
+#include "librpc/gen_ndr/ndr_irpc.h"
+#include "lib/messaging/irpc.h"
+#include "libds/common/roles.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_DNS
+
+NTSTATUS server_service_dns_init(TALLOC_CTX *);
/* hold information about one dns socket */
struct dns_socket {
dns_tcp_terminate_connection(dnsconn, "dns_tcp_send: called");
}
-bool dns_process(struct dns_server *dns,
- TALLOC_CTX *mem_ctx,
- DATA_BLOB *in,
- DATA_BLOB *out)
+struct dns_process_state {
+ DATA_BLOB *in;
+ struct dns_server *dns;
+ struct dns_name_packet in_packet;
+ struct dns_request_state state;
+ uint16_t dns_err;
+ struct dns_name_packet out_packet;
+ DATA_BLOB out;
+};
+
+static void dns_process_done(struct tevent_req *subreq);
+
+static struct tevent_req *dns_process_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct dns_server *dns,
+ const struct tsocket_address *remote_address,
+ const struct tsocket_address *local_address,
+ DATA_BLOB *in)
+{
+ struct tevent_req *req, *subreq;
+ struct dns_process_state *state;
+ enum ndr_err_code ndr_err;
+ WERROR ret;
+ const char **forwarder = lpcfg_dns_forwarder(dns->task->lp_ctx);
+ req = tevent_req_create(mem_ctx, &state, struct dns_process_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ state->state.mem_ctx = state;
+ state->in = in;
+
+ state->dns = dns;
+
+ if (in->length < 12) {
+ tevent_req_werror(req, WERR_INVALID_PARAMETER);
+ return tevent_req_post(req, ev);
+ }
+ dump_data_dbgc(DBGC_DNS, 8, in->data, in->length);
+
+ ndr_err = ndr_pull_struct_blob(
+ in, state, &state->in_packet,
+ (ndr_pull_flags_fn_t)ndr_pull_dns_name_packet);
+
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ state->dns_err = DNS_RCODE_FORMERR;
+ tevent_req_done(req);
+ return tevent_req_post(req, ev);
+ }
+ if (DEBUGLVLC(DBGC_DNS, 8)) {
+ NDR_PRINT_DEBUGC(DBGC_DNS, dns_name_packet, &state->in_packet);
+ }
+
+ if (state->in_packet.operation & DNS_FLAG_REPLY) {
+ DEBUG(1, ("Won't reply to replies.\n"));
+ tevent_req_werror(req, WERR_INVALID_PARAMETER);
+ return tevent_req_post(req, ev);
+ }
+
+ state->state.flags = state->in_packet.operation;
+ state->state.flags |= DNS_FLAG_REPLY;
+
+ state->state.local_address = local_address;
+ state->state.remote_address = remote_address;
+
+ if (forwarder && *forwarder && **forwarder) {
+ state->state.flags |= DNS_FLAG_RECURSION_AVAIL;
+ }
+
+ state->out_packet = state->in_packet;
+
+ ret = dns_verify_tsig(dns, state, &state->state,
+ &state->out_packet, in);
+ if (!W_ERROR_IS_OK(ret)) {
+ state->dns_err = werr_to_dns_err(ret);
+ tevent_req_done(req);
+ return tevent_req_post(req, ev);
+ }
+
+ switch (state->in_packet.operation & DNS_OPCODE) {
+ case DNS_OPCODE_QUERY:
+ subreq = dns_server_process_query_send(
+ state, ev, dns,
+ &state->state, &state->in_packet);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, dns_process_done, req);
+ return req;
+ case DNS_OPCODE_UPDATE:
+ ret = dns_server_process_update(
+ dns, &state->state, state, &state->in_packet,
+ &state->out_packet.answers, &state->out_packet.ancount,
+ &state->out_packet.nsrecs, &state->out_packet.nscount,
+ &state->out_packet.additional,
+ &state->out_packet.arcount);
+ break;
+ default:
+ ret = WERR_DNS_ERROR_RCODE_NOT_IMPLEMENTED;
+ }
+ if (!W_ERROR_IS_OK(ret)) {
+ state->dns_err = werr_to_dns_err(ret);
+ }
+ tevent_req_done(req);
+ return tevent_req_post(req, ev);
+}
+
+static void dns_process_done(struct tevent_req *subreq)
{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct dns_process_state *state = tevent_req_data(
+ req, struct dns_process_state);
+ WERROR ret;
+
+ ret = dns_server_process_query_recv(
+ subreq, state,
+ &state->out_packet.answers, &state->out_packet.ancount,
+ &state->out_packet.nsrecs, &state->out_packet.nscount,
+ &state->out_packet.additional, &state->out_packet.arcount);
+ TALLOC_FREE(subreq);
+
+ if (!W_ERROR_IS_OK(ret)) {
+ state->dns_err = werr_to_dns_err(ret);
+ }
+ tevent_req_done(req);
+}
+
+static WERROR dns_process_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ DATA_BLOB *out)
+{
+ struct dns_process_state *state = tevent_req_data(
+ req, struct dns_process_state);
enum ndr_err_code ndr_err;
- struct dns_name_packet *packet = talloc(mem_ctx, struct dns_name_packet);
- if (packet == NULL) return false;
+ WERROR ret;
- dump_data(0, in->data, in->length);
+ if (tevent_req_is_werror(req, &ret)) {
+ return ret;
+ }
+ if ((state->dns_err != DNS_RCODE_OK) &&
+ (state->dns_err != DNS_RCODE_NXDOMAIN) &&
+ (state->dns_err != DNS_RCODE_NOTAUTH))
+ {
+ goto drop;
+ }
+ if (state->dns_err != DNS_RCODE_OK) {
+ state->out_packet.operation |= state->dns_err;
+ }
+ state->out_packet.operation |= state->state.flags;
+
+ if (state->state.sign) {
+ ret = dns_sign_tsig(state->dns, mem_ctx, &state->state,
+ &state->out_packet, 0);
+ if (!W_ERROR_IS_OK(ret)) {
+ state->dns_err = DNS_RCODE_SERVFAIL;
+ goto drop;
+ }
+ }
- ndr_err = ndr_pull_struct_blob(in, packet, packet,
- (ndr_pull_flags_fn_t)ndr_pull_dns_name_packet);
+ if (DEBUGLVLC(DBGC_DNS, 8)) {
+ NDR_PRINT_DEBUGC(DBGC_DNS, dns_name_packet, &state->out_packet);
+ }
+
+ ndr_err = ndr_push_struct_blob(
+ out, mem_ctx, &state->out_packet,
+ (ndr_push_flags_fn_t)ndr_push_dns_name_packet);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
- TALLOC_FREE(packet);
- DEBUG(0, ("Failed to parse packet %d!\n", ndr_err));
- return false;
+ DEBUG(1, ("Failed to push packet: %s!\n",
+ ndr_errstr(ndr_err)));
+ state->dns_err = DNS_RCODE_SERVFAIL;
+ goto drop;
}
+ return WERR_OK;
- NDR_PRINT_DEBUG(dns_name_packet, packet);
- return true;
+drop:
+ *out = data_blob_talloc(mem_ctx, state->in->data, state->in->length);
+ if (out->data == NULL) {
+ return WERR_NOT_ENOUGH_MEMORY;
+ }
+ out->data[2] |= 0x80; /* Toggle DNS_FLAG_REPLY */
+ out->data[3] |= state->dns_err;
+ return WERR_OK;
}
struct dns_tcp_call {
struct iovec out_iov[2];
};
+static void dns_tcp_call_process_done(struct tevent_req *subreq);
static void dns_tcp_call_writev_done(struct tevent_req *subreq);
static void dns_tcp_call_loop(struct tevent_req *subreq)
{
struct dns_tcp_connection *dns_conn = tevent_req_callback_data(subreq,
struct dns_tcp_connection);
+ struct dns_server *dns = dns_conn->dns_socket->dns;
struct dns_tcp_call *call;
NTSTATUS status;
- bool ok;
call = talloc(dns_conn, struct dns_tcp_call);
if (call == NULL) {
return;
}
- DEBUG(10,("Received krb5 TCP packet of length %lu from %s\n",
+ DEBUG(10,("Received DNS TCP packet of length %lu from %s\n",
(long) call->in.length,
tsocket_address_string(dns_conn->conn->remote_address, call)));
/* skip length header */
- call->in.data +=4;
- call->in.length -= 4;
+ call->in.data += 2;
+ call->in.length -= 2;
- /* Call dns */
- ok = dns_process(dns_conn->dns_socket->dns, call, &call->in, &call->out);
- if (!ok) {
+ subreq = dns_process_send(call, dns->task->event_ctx, dns,
+ dns_conn->conn->remote_address,
+ dns_conn->conn->local_address,
+ &call->in);
+ if (subreq == NULL) {
+ dns_tcp_terminate_connection(
+ dns_conn, "dns_tcp_call_loop: dns_process_send "
+ "failed\n");
+ return;
+ }
+ tevent_req_set_callback(subreq, dns_tcp_call_process_done, call);
+
+ /*
+ * The dns tcp pdu's has the length as 2 byte (initial_read_size),
+ * packet_full_request_u16 provides the pdu length then.
+ */
+ subreq = tstream_read_pdu_blob_send(dns_conn,
+ dns_conn->conn->event.ctx,
+ dns_conn->tstream,
+ 2, /* initial_read_size */
+ packet_full_request_u16,
+ dns_conn);
+ if (subreq == NULL) {
+ dns_tcp_terminate_connection(dns_conn, "dns_tcp_call_loop: "
+ "no memory for tstream_read_pdu_blob_send");
+ return;
+ }
+ tevent_req_set_callback(subreq, dns_tcp_call_loop, dns_conn);
+}
+
+static void dns_tcp_call_process_done(struct tevent_req *subreq)
+{
+ struct dns_tcp_call *call = tevent_req_callback_data(subreq,
+ struct dns_tcp_call);
+ struct dns_tcp_connection *dns_conn = call->dns_conn;
+ WERROR err;
+
+ err = dns_process_recv(subreq, call, &call->out);
+ TALLOC_FREE(subreq);
+ if (!W_ERROR_IS_OK(err)) {
+ DEBUG(1, ("dns_process returned %s\n", win_errstr(err)));
dns_tcp_terminate_connection(dns_conn,
"dns_tcp_call_loop: process function failed");
return;
}
/* First add the length of the out buffer */
- RSIVAL(call->out_hdr, 0, call->out.length);
+ RSSVAL(call->out_hdr, 0, call->out.length);
call->out_iov[0].iov_base = (char *) call->out_hdr;
- call->out_iov[0].iov_len = 4;
+ call->out_iov[0].iov_len = 2;
call->out_iov[1].iov_base = (char *) call->out.data;
call->out_iov[1].iov_len = call->out.length;
return;
}
tevent_req_set_callback(subreq, dns_tcp_call_writev_done, call);
-
- /*
- * The krb5 tcp pdu's has the length as 4 byte (initial_read_size),
- * packet_full_request_u32 provides the pdu length then.
- */
- subreq = tstream_read_pdu_blob_send(dns_conn,
- dns_conn->conn->event.ctx,
- dns_conn->tstream,
- 4, /* initial_read_size */
- packet_full_request_u32,
- dns_conn);
- if (subreq == NULL) {
- dns_tcp_terminate_connection(dns_conn, "dns_tcp_call_loop: "
- "no memory for tstream_read_pdu_blob_send");
- return;
- }
- tevent_req_set_callback(subreq, dns_tcp_call_loop, dns_conn);
}
static void dns_tcp_call_writev_done(struct tevent_req *subreq)
conn->private_data = dns_conn;
/*
- * The krb5 tcp pdu's has the length as 4 byte (initial_read_size),
- * packet_full_request_u32 provides the pdu length then.
+ * The dns tcp pdu's has the length as 2 byte (initial_read_size),
+ * packet_full_request_u16 provides the pdu length then.
*/
subreq = tstream_read_pdu_blob_send(dns_conn,
dns_conn->conn->event.ctx,
dns_conn->tstream,
- 4, /* initial_read_size */
- packet_full_request_u32,
+ 2, /* initial_read_size */
+ packet_full_request_u16,
dns_conn);
if (subreq == NULL) {
dns_tcp_terminate_connection(dns_conn, "dns_tcp_accept: "
};
struct dns_udp_call {
+ struct dns_udp_socket *sock;
struct tsocket_address *src;
DATA_BLOB in;
DATA_BLOB out;
};
+static void dns_udp_call_process_done(struct tevent_req *subreq);
static void dns_udp_call_sendto_done(struct tevent_req *subreq);
static void dns_udp_call_loop(struct tevent_req *subreq)
{
struct dns_udp_socket *sock = tevent_req_callback_data(subreq,
struct dns_udp_socket);
+ struct dns_server *dns = sock->dns_socket->dns;
struct dns_udp_call *call;
uint8_t *buf;
ssize_t len;
int sys_errno;
- bool ok;
call = talloc(sock, struct dns_udp_call);
if (call == NULL) {
talloc_free(call);
goto done;
}
+ call->sock = sock;
len = tdgram_recvfrom_recv(subreq, &sys_errno,
call, &buf, &call->src);
call->in.data = buf;
call->in.length = len;
- DEBUG(10,("Received krb5 UDP packet of length %lu from %s\n",
+ DEBUG(10,("Received DNS UDP packet of length %lu from %s\n",
(long)call->in.length,
tsocket_address_string(call->src, call)));
- /* Call krb5 */
- ok = dns_process(sock->dns_socket->dns, call, &call->in, &call->out);
- if (!ok) {
- talloc_free(call);
- goto done;
- }
-
- subreq = tdgram_sendto_queue_send(call,
- sock->dns_socket->dns->task->event_ctx,
- sock->dgram,
- sock->send_queue,
- call->out.data,
- call->out.length,
- call->src);
+ subreq = dns_process_send(call, dns->task->event_ctx, dns,
+ call->src,
+ sock->dns_socket->local_address,
+ &call->in);
if (subreq == NULL) {
- talloc_free(call);
+ TALLOC_FREE(call);
goto done;
}
- tevent_req_set_callback(subreq, dns_udp_call_sendto_done, call);
+ tevent_req_set_callback(subreq, dns_udp_call_process_done, call);
done:
subreq = tdgram_recvfrom_send(sock,
tevent_req_set_callback(subreq, dns_udp_call_loop, sock);
}
+static void dns_udp_call_process_done(struct tevent_req *subreq)
+{
+ struct dns_udp_call *call = tevent_req_callback_data(
+ subreq, struct dns_udp_call);
+ struct dns_udp_socket *sock = call->sock;
+ struct dns_server *dns = sock->dns_socket->dns;
+ WERROR err;
+
+ err = dns_process_recv(subreq, call, &call->out);
+ TALLOC_FREE(subreq);
+ if (!W_ERROR_IS_OK(err)) {
+ DEBUG(1, ("dns_process returned %s\n", win_errstr(err)));
+ TALLOC_FREE(call);
+ return;
+ }
+
+ subreq = tdgram_sendto_queue_send(call,
+ dns->task->event_ctx,
+ sock->dgram,
+ sock->send_queue,
+ call->out.data,
+ call->out.length,
+ call->src);
+ if (subreq == NULL) {
+ talloc_free(call);
+ return;
+ }
+ tevent_req_set_callback(subreq, dns_udp_call_sendto_done, call);
+
+}
static void dns_udp_call_sendto_done(struct tevent_req *subreq)
{
struct dns_udp_call *call = tevent_req_callback_data(subreq,
struct dns_udp_call);
- ssize_t ret;
int sys_errno;
- ret = tdgram_sendto_queue_recv(subreq, &sys_errno);
+ tdgram_sendto_queue_recv(subreq, &sys_errno);
/* We don't care about errors */
address, port,
&dns_socket->local_address);
if (ret != 0) {
- status = map_nt_error_from_unix(errno);
+ status = map_nt_error_from_unix_common(errno);
return status;
}
- status = stream_setup_socket(dns->task->event_ctx,
+ status = stream_setup_socket(dns->task,
+ dns->task->event_ctx,
dns->task->lp_ctx,
model_ops,
&dns_tcp_stream_ops,
"ip", address, &port,
lpcfg_socket_options(dns->task->lp_ctx),
- dns_socket);
+ dns_socket,
+ dns->task->process_context);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("Failed to bind to %s:%u TCP - %s\n",
address, port, nt_errstr(status)));
dns_udp_socket,
&dns_udp_socket->dgram);
if (ret != 0) {
- status = map_nt_error_from_unix(errno);
+ status = map_nt_error_from_unix_common(errno);
DEBUG(0,("Failed to bind to %s:%u UDP - %s\n",
address, port, nt_errstr(status)));
return status;
/*
setup our listening sockets on the configured network interfaces
*/
-static NTSTATUS dns_startup_interfaces(struct dns_server *dns, struct loadparm_context *lp_ctx,
- struct interface *ifaces)
+static NTSTATUS dns_startup_interfaces(struct dns_server *dns,
+ struct interface *ifaces,
+ const struct model_ops *model_ops)
{
- const struct model_ops *model_ops;
- int num_interfaces;
+ size_t num_interfaces;
TALLOC_CTX *tmp_ctx = talloc_new(dns);
NTSTATUS status;
int i;
- /* within the dns task we want to be a single process, so
- ask for the single process model ops and pass these to the
- stream_setup_socket() call. */
- model_ops = process_model_startup(dns->task->event_ctx, "single");
- if (!model_ops) {
- DEBUG(0,("Can't find 'single' process model_ops\n"));
- return NT_STATUS_INTERNAL_ERROR;
+ if (ifaces != NULL) {
+ num_interfaces = iface_list_count(ifaces);
+
+ for (i=0; i<num_interfaces; i++) {
+ const char *address = talloc_strdup(tmp_ctx,
+ iface_list_n_ip(ifaces, i));
+
+ status = dns_add_socket(dns, model_ops, "dns", address,
+ DNS_SERVICE_PORT);
+ NT_STATUS_NOT_OK_RETURN(status);
+ }
+ } else {
+ size_t num_binds = 0;
+ char **wcard;
+ wcard = iface_list_wildcard(tmp_ctx);
+ if (wcard == NULL) {
+ DEBUG(0, ("No wildcard address available\n"));
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+ for (i = 0; wcard[i] != NULL; i++) {
+ status = dns_add_socket(dns, model_ops, "dns", wcard[i],
+ DNS_SERVICE_PORT);
+ if (NT_STATUS_IS_OK(status)) {
+ num_binds++;
+ }
+ }
+ if (num_binds == 0) {
+ talloc_free(tmp_ctx);
+ return NT_STATUS_INVALID_PARAMETER_MIX;
+ }
}
- num_interfaces = iface_count(ifaces);
+ talloc_free(tmp_ctx);
+
+ return NT_STATUS_OK;
+}
+
+static struct dns_server_tkey_store *tkey_store_init(TALLOC_CTX *mem_ctx,
+ uint16_t size)
+{
+ struct dns_server_tkey_store *buffer = talloc_zero(mem_ctx,
+ struct dns_server_tkey_store);
+
+ if (buffer == NULL) {
+ return NULL;
+ }
- for (i=0; i<num_interfaces; i++) {
- const char *address = talloc_strdup(tmp_ctx, iface_n_ip(ifaces, i));
+ buffer->size = size;
+ buffer->next_idx = 0;
- status = dns_add_socket(dns, model_ops, "dns", address, DNS_SERVICE_PORT);
- NT_STATUS_NOT_OK_RETURN(status);
+ buffer->tkeys = talloc_zero_array(buffer, struct dns_server_tkey *, size);
+ if (buffer->tkeys == NULL) {
+ TALLOC_FREE(buffer);
}
- talloc_free(tmp_ctx);
+ return buffer;
+}
+
+static NTSTATUS dns_server_reload_zones(struct dns_server *dns)
+{
+ NTSTATUS status;
+ struct dns_server_zone *new_list = NULL;
+ struct dns_server_zone *old_list = NULL;
+ struct dns_server_zone *old_zone;
+ status = dns_common_zones(dns->samdb, dns, NULL, &new_list);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ dns->zones = new_list;
+ while ((old_zone = DLIST_TAIL(old_list)) != NULL) {
+ DLIST_REMOVE(old_list, old_zone);
+ talloc_free(old_zone);
+ }
return NT_STATUS_OK;
}
-static void dns_task_init(struct task_server *task)
+
+/**
+ * Called when the internal DNS server should reload the zones from DB, for
+ * example, when zones are added or deleted through RPC or replicated by
+ * inbound DRS.
+ */
+static NTSTATUS dns_reload_zones(struct irpc_message *msg,
+ struct dnssrv_reload_dns_zones *r)
+{
+ struct dns_server *dns;
+
+ dns = talloc_get_type(msg->private_data, struct dns_server);
+ if (dns == NULL) {
+ r->out.result = NT_STATUS_INTERNAL_ERROR;
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ r->out.result = dns_server_reload_zones(dns);
+
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS dns_task_init(struct task_server *task)
{
struct dns_server *dns;
NTSTATUS status;
- struct interface *ifaces;
+ struct interface *ifaces = NULL;
+ int ret;
+ static const char * const attrs_none[] = { NULL};
+ struct ldb_message *dns_acc;
+ char *hostname_lower;
+ char *dns_spn;
switch (lpcfg_server_role(task->lp_ctx)) {
case ROLE_STANDALONE:
task_server_terminate(task, "dns: no DNS required in standalone configuration", false);
- return;
+ return NT_STATUS_INVALID_DOMAIN_ROLE;
case ROLE_DOMAIN_MEMBER:
task_server_terminate(task, "dns: no DNS required in member server configuration", false);
- return;
- case ROLE_DOMAIN_CONTROLLER:
+ return NT_STATUS_INVALID_DOMAIN_ROLE;
+ case ROLE_ACTIVE_DIRECTORY_DC:
/* Yes, we want a DNS */
break;
}
- load_interfaces(task, lpcfg_interfaces(task->lp_ctx), &ifaces);
+ if (lpcfg_interfaces(task->lp_ctx) && lpcfg_bind_interfaces_only(task->lp_ctx)) {
+ load_interface_list(task, task->lp_ctx, &ifaces);
- if (iface_count(ifaces) == 0) {
- task_server_terminate(task, "dns: no network interfaces configured", false);
- return;
+ if (iface_list_count(ifaces) == 0) {
+ task_server_terminate(task, "dns: no network interfaces configured", false);
+ return NT_STATUS_UNSUCCESSFUL;
+ }
}
task_server_set_title(task, "task[dns]");
- dns = talloc(task, struct dns_server);
+ dns = talloc_zero(task, struct dns_server);
if (dns == NULL) {
task_server_terminate(task, "dns: out of memory", true);
- return;
+ return NT_STATUS_NO_MEMORY;
}
dns->task = task;
- status = dns_startup_interfaces(dns, task->lp_ctx, ifaces);
+ dns->server_credentials = cli_credentials_init(dns);
+ if (!dns->server_credentials) {
+ task_server_terminate(task, "Failed to init server credentials\n", true);
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ dns->samdb = samdb_connect(dns,
+ dns->task->event_ctx,
+ dns->task->lp_ctx,
+ system_session(dns->task->lp_ctx),
+ NULL,
+ 0);
+ if (!dns->samdb) {
+ task_server_terminate(task, "dns: samdb_connect failed", true);
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ cli_credentials_set_conf(dns->server_credentials, task->lp_ctx);
+
+ hostname_lower = strlower_talloc(dns, lpcfg_netbios_name(task->lp_ctx));
+ dns_spn = talloc_asprintf(dns, "DNS/%s.%s",
+ hostname_lower,
+ lpcfg_dnsdomain(task->lp_ctx));
+ TALLOC_FREE(hostname_lower);
+
+ ret = dsdb_search_one(dns->samdb, dns, &dns_acc,
+ ldb_get_default_basedn(dns->samdb), LDB_SCOPE_SUBTREE,
+ attrs_none, 0, "(servicePrincipalName=%s)",
+ dns_spn);
+ if (ret == LDB_SUCCESS) {
+ TALLOC_FREE(dns_acc);
+ if (!dns_spn) {
+ task_server_terminate(task, "dns: talloc_asprintf failed", true);
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+ status = cli_credentials_set_stored_principal(dns->server_credentials, task->lp_ctx, dns_spn);
+ if (!NT_STATUS_IS_OK(status)) {
+ task_server_terminate(task,
+ talloc_asprintf(task, "Failed to obtain server credentials for DNS, "
+ "despite finding it in the samdb! %s\n",
+ nt_errstr(status)),
+ true);
+ return status;
+ }
+ } else {
+ TALLOC_FREE(dns_spn);
+ status = cli_credentials_set_machine_account(dns->server_credentials, task->lp_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ task_server_terminate(task,
+ talloc_asprintf(task, "Failed to obtain server credentials, perhaps a standalone server?: %s\n",
+ nt_errstr(status)),
+ true);
+ return status;
+ }
+ }
+
+ dns->tkeys = tkey_store_init(dns, TKEY_BUFFER_SIZE);
+ if (!dns->tkeys) {
+ task_server_terminate(task, "Failed to allocate tkey storage\n", true);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = dns_server_reload_zones(dns);
+ if (!NT_STATUS_IS_OK(status)) {
+ task_server_terminate(task, "dns: failed to load DNS zones", true);
+ return status;
+ }
+
+ status = dns_startup_interfaces(dns, ifaces, task->model_ops);
if (!NT_STATUS_IS_OK(status)) {
task_server_terminate(task, "dns failed to setup interfaces", true);
- return;
+ return status;
+ }
+
+ /* Setup the IRPC interface and register handlers */
+ status = irpc_add_name(task->msg_ctx, "dnssrv");
+ if (!NT_STATUS_IS_OK(status)) {
+ task_server_terminate(task, "dns: failed to register IRPC name", true);
+ return status;
}
+
+ status = IRPC_REGISTER(task->msg_ctx, irpc, DNSSRV_RELOAD_DNS_ZONES,
+ dns_reload_zones, dns);
+ if (!NT_STATUS_IS_OK(status)) {
+ task_server_terminate(task, "dns: failed to setup reload handler", true);
+ return status;
+ }
+ return NT_STATUS_OK;
}
-NTSTATUS server_service_dns_init(void)
+NTSTATUS server_service_dns_init(TALLOC_CTX *ctx)
{
- return register_server_service("dns", dns_task_init);
+ static const struct service_details details = {
+ .inhibit_fork_on_accept = true,
+ .inhibit_pre_fork = true,
+ .task_init = dns_task_init,
+ .post_fork = NULL
+ };
+ return register_server_service(ctx, "dns", &details);
}