#include "auth/session.h"
#include "lib/util/dlinklist.h"
#include "lib/util/tevent_werror.h"
+#include "auth/auth.h"
+#include "auth/credentials/credentials.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_DNS
NTSTATUS server_service_dns_init(void);
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_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->in = in;
+ state->dns = dns;
+
if (in->length < 12) {
tevent_req_werror(req, WERR_INVALID_PARAM);
return tevent_req_post(req, ev);
NDR_PRINT_DEBUG(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);
+ 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)) {
+
+ if (forwarder && *forwarder) {
state->state.flags |= DNS_FLAG_RECURSION_AVAIL;
}
}
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;
+ }
+ }
+
+ if (DEBUGLVL(8)) {
+ NDR_PRINT_DEBUG(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);
{
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 */
return NT_STATUS_INTERNAL_ERROR;
}
- num_interfaces = iface_list_count(ifaces);
+ 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));
+ 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 {
+ const char **wcard;
+ wcard = iface_list_wildcard(tmp_ctx, lp_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);
+ NT_STATUS_NOT_OK_RETURN(status);
+ }
}
talloc_free(tmp_ctx);
return 0;
}
+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;
+ }
+
+ buffer->size = size;
+ buffer->next_idx = 0;
+
+ buffer->tkeys = talloc_zero_array(buffer, struct dns_server_tkey *, size);
+ if (buffer->tkeys == NULL) {
+ TALLOC_FREE(buffer);
+ }
+
+ return buffer;
+}
+
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};
+ static const char * const attrs_none[] = { NULL};
unsigned int i;
+ struct ldb_message *dns_acc;
+ char *hostname_lower;
+ char *dns_spn;
switch (lpcfg_server_role(task->lp_ctx)) {
case ROLE_STANDALONE:
case ROLE_DOMAIN_MEMBER:
task_server_terminate(task, "dns: no DNS required in member server configuration", false);
return;
- case ROLE_DOMAIN_CONTROLLER:
+ case ROLE_ACTIVE_DIRECTORY_DC:
/* Yes, we want a DNS */
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]");
dns->task = task;
+ dns->server_credentials = cli_credentials_init(dns);
+ if (!dns->server_credentials) {
+ task_server_terminate(task, "Failed to init server credentials\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) {
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;
+ }
+
// 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)");
z = talloc_zero(dns, struct dns_server_zone);
if (z == NULL) {
+ task_server_terminate(task, "dns failed to allocate memory", true);
}
z->name = ldb_msg_find_attr_as_string(res->msgs[i], "name", NULL);
z->dn = talloc_move(z, &res->msgs[i]->dn);
-
+ /*
+ * Ignore the RootDNSServers zone and zones that we don't support yet
+ * RootDNSServers should never be returned (Windows DNS server don't)
+ * ..TrustAnchors should never be returned as is, (Windows returns
+ * TrustAnchors) and for the moment we don't support DNSSEC so we'd better
+ * not return this zone.
+ */
+ if ((strcmp(z->name, "RootDNSServers") == 0) ||
+ (strcmp(z->name, "..TrustAnchors") == 0))
+ {
+ DEBUG(10, ("Ignoring zone %s\n", z->name));
+ talloc_free(z);
+ continue;
+ }
DLIST_ADD_END(dns->zones, z, NULL);
}
git.samba.org / kai / samba.git / blobdiff