#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"
-NTSTATUS server_service_dns_init(void);
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_DNS
+
+NTSTATUS server_service_dns_init(TALLOC_CTX *);
/* hold information about one dns socket */
struct dns_socket {
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_PARAM);
+ tevent_req_werror(req, WERR_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
- dump_data(8, in->data, in->length);
+ dump_data_dbgc(DBGC_DNS, 8, in->data, in->length);
ndr_err = ndr_pull_struct_blob(
in, state, &state->in_packet,
tevent_req_done(req);
return tevent_req_post(req, ev);
}
- if (DEBUGLVL(8)) {
- NDR_PRINT_DEBUG(dns_name_packet, &state->in_packet);
+ if (DEBUGLVLC(DBGC_DNS, 8)) {
+ NDR_PRINT_DEBUGC(DBGC_DNS, dns_name_packet, &state->in_packet);
}
- ret = dns_verify_tsig(dns, state, &state->state, &state->in_packet, in);
- if (!W_ERROR_IS_OK(ret)) {
- DEBUG(1, ("Failed to verify TSIG!\n"));
- state->dns_err = werr_to_dns_err(ret);
- tevent_req_done(req);
+ 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;
- if (lpcfg_dns_recursive_queries(dns->task->lp_ctx)) {
+ 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);
+ state, ev, dns,
+ &state->state, &state->in_packet);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
if (tevent_req_is_werror(req, &ret)) {
return ret;
}
- if (state->dns_err != DNS_RCODE_OK) {
+ 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) {
}
}
+ 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);
drop:
*out = data_blob_talloc(mem_ctx, state->in->data, state->in->length);
if (out->data == NULL) {
- return WERR_NOMEM;
+ return WERR_NOT_ENOUGH_MEMORY;
}
out->data[2] |= 0x80; /* Toggle DNS_FLAG_REPLY */
out->data[3] |= state->dns_err;
call->in.length -= 2;
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(
tsocket_address_string(call->src, call)));
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);
{
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 */
&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)));
/*
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;
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("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);
- 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));
- 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);
+ status = dns_add_socket(dns, model_ops, "dns", address,
+ DNS_SERVICE_PORT);
+ NT_STATUS_NOT_OK_RETURN(status);
+ }
+ } else {
+ int 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;
+ }
}
talloc_free(tmp_ctx);
return NT_STATUS_OK;
}
-static int dns_server_sort_zones(struct ldb_message **m1, struct ldb_message **m2)
-{
- const char *n1, *n2;
- size_t l1, l2;
-
- n1 = ldb_msg_find_attr_as_string(*m1, "name", NULL);
- n2 = ldb_msg_find_attr_as_string(*m2, "name", NULL);
-
- l1 = strlen(n1);
- l2 = strlen(n2);
-
- /* If the string lengths are not equal just sort by length */
- if (l1 != l2) {
- /* If m1 is the larger zone name, return it first */
- return l2 - l1;
- }
-
- /*TODO: We need to compare DNs here, we want the DomainDNSZones first */
- return 0;
-}
-
static struct dns_server_tkey_store *tkey_store_init(TALLOC_CTX *mem_ctx,
uint16_t size)
{
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;
+}
+
+/**
+ * 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 void dns_task_init(struct task_server *task)
{
struct dns_server *dns;
NTSTATUS status;
- struct interface *ifaces;
+ struct interface *ifaces = NULL;
int ret;
- struct ldb_result *res;
- static const char * const attrs[] = { "name", NULL};
- unsigned int i;
+ 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:
break;
}
- load_interface_list(task, 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_list_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;
+ }
}
task_server_set_title(task, "task[dns]");
return;
}
- cli_credentials_set_conf(dns->server_credentials, task->lp_ctx);
- 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);
+ dns->samdb = samdb_connect(dns, dns->task->event_ctx, dns->task->lp_ctx,
+ system_session(dns->task->lp_ctx), 0);
+ if (!dns->samdb) {
+ task_server_terminate(task, "dns: samdb_connect failed", true);
return;
}
+ 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;
+ }
+ 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;
+ }
+ } 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;
+ }
+ }
+
dns->tkeys = tkey_store_init(dns, TKEY_BUFFER_SIZE);
if (!dns->tkeys) {
task_server_terminate(task, "Failed to allocate tkey storage\n", true);
return;
}
- dns->samdb = samdb_connect(dns, dns->task->event_ctx, dns->task->lp_ctx,
- system_session(dns->task->lp_ctx), 0);
- if (!dns->samdb) {
- task_server_terminate(task, "dns: samdb_connect failed", true);
+ status = dns_server_reload_zones(dns);
+ if (!NT_STATUS_IS_OK(status)) {
+ task_server_terminate(task, "dns: failed to load DNS zones", true);
return;
}
- // TODO: this search does not work against windows
- ret = dsdb_search(dns->samdb, dns, &res, NULL, LDB_SCOPE_SUBTREE,
- attrs, DSDB_SEARCH_SEARCH_ALL_PARTITIONS, "(objectClass=dnsZone)");
- if (ret != LDB_SUCCESS) {
- task_server_terminate(task,
- "dns: failed to look up root DNS zones",
- true);
+ 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;
}
- TYPESAFE_QSORT(res->msgs, res->count, dns_server_sort_zones);
-
- for (i=0; i < res->count; i++) {
- struct dns_server_zone *z;
-
- z = talloc_zero(dns, struct dns_server_zone);
- if (z == NULL) {
- }
-
- z->name = ldb_msg_find_attr_as_string(res->msgs[i], "name", NULL);
- z->dn = talloc_move(z, &res->msgs[i]->dn);
-
- DLIST_ADD_END(dns->zones, z, NULL);
+ /* 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 = dns_startup_interfaces(dns, task->lp_ctx, ifaces);
+ 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 interfaces", true);
+ task_server_terminate(task, "dns: failed to setup reload handler", true);
return;
}
}
-NTSTATUS server_service_dns_init(void)
+NTSTATUS server_service_dns_init(TALLOC_CTX *ctx)
{
- return register_server_service("dns", dns_task_init);
+ struct service_details details = {
+ .inhibit_fork_on_accept = true,
+ .inhibit_pre_fork = true,
+ };
+ return register_server_service(ctx, "dns", dns_task_init, &details);
}
git.samba.org / vlendec / samba-autobuild / .git / blobdiff