+
+static void _net_ads_join_dns_updates(TALLOC_CTX *ctx, struct libnet_JoinCtx *r)
+{
+#if defined(WITH_DNS_UPDATES)
+ ADS_STRUCT *ads_dns = NULL;
+ int ret;
+ NTSTATUS status;
+
+ /*
+ * In a clustered environment, don't do dynamic dns updates:
+ * Registering the set of ip addresses that are assigned to
+ * the interfaces of the node that performs the join does usually
+ * not have the desired effect, since the local interfaces do not
+ * carry the complete set of the cluster's public IP addresses.
+ * And it can also contain internal addresses that should not
+ * be visible to the outside at all.
+ * In order to do dns updates in a clustererd setup, use
+ * net ads dns register.
+ */
+ if (lp_clustering()) {
+ d_fprintf(stderr, _("Not doing automatic DNS update in a "
+ "clustered setup.\n"));
+ return;
+ }
+
+ if (!r->out.domain_is_ad) {
+ return;
+ }
+
+ /*
+ * We enter this block with user creds.
+ * kinit with the machine password to do dns update.
+ */
+
+ ads_dns = ads_init(lp_realm(), NULL, r->in.dc_name);
+
+ if (ads_dns == NULL) {
+ d_fprintf(stderr, _("DNS update failed: out of memory!\n"));
+ goto done;
+ }
+
+ use_in_memory_ccache();
+
+ ret = asprintf(&ads_dns->auth.user_name, "%s$", lp_netbios_name());
+ if (ret == -1) {
+ d_fprintf(stderr, _("DNS update failed: out of memory\n"));
+ goto done;
+ }
+
+ ads_dns->auth.password = secrets_fetch_machine_password(
+ r->out.netbios_domain_name, NULL, NULL);
+ if (ads_dns->auth.password == NULL) {
+ d_fprintf(stderr, _("DNS update failed: out of memory\n"));
+ goto done;
+ }
+
+ ads_dns->auth.realm = SMB_STRDUP(r->out.dns_domain_name);
+ if (ads_dns->auth.realm == NULL) {
+ d_fprintf(stderr, _("DNS update failed: out of memory\n"));
+ goto done;
+ }
+
+ strupper_m(ads_dns->auth.realm);
+
+ ret = ads_kinit_password(ads_dns);
+ if (ret != 0) {
+ d_fprintf(stderr,
+ _("DNS update failed: kinit failed: %s\n"),
+ error_message(ret));
+ goto done;
+ }
+
+ status = net_update_dns(ctx, ads_dns, NULL);
+ if (!NT_STATUS_IS_OK(status)) {
+ d_fprintf( stderr, _("DNS update failed: %s\n"),
+ nt_errstr(status));
+ }
+
+done:
+ ads_destroy(&ads_dns);
+#endif
+
+ return;
+}
+