#include <config.h>
#include <isc/log.h>
#include <dns/message.h>
#include <dns/rdataset.h>
#include <dns/result.h>
#include <dns/view.h>
#include <dns/zone.h>
#include <dns/zt.h>
#include <named/log.h>
#include <named/notify.h>
static void
notify_log(int level, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
isc_log_vwrite(ns_g_lctx, DNS_LOGCATEGORY_NOTIFY, NS_LOGMODULE_NOTIFY,
level, fmt, ap);
va_end(ap);
}
static void
respond(ns_client_t *client, isc_result_t result) {
dns_rcode_t rcode;
dns_message_t *message;
isc_result_t msg_result;
message = client->message;
rcode = dns_result_torcode(result);
msg_result = dns_message_reply(message, ISC_TRUE);
if (msg_result != ISC_R_SUCCESS)
msg_result = dns_message_reply(message, ISC_FALSE);
if (msg_result != ISC_R_SUCCESS) {
ns_client_next(client, msg_result);
return;
}
message->rcode = rcode;
if (rcode == dns_rcode_noerror)
message->flags |= DNS_MESSAGEFLAG_AA;
else
message->flags &= ~DNS_MESSAGEFLAG_AA;
ns_client_send(client);
}
void
ns_notify_start(ns_client_t *client) {
dns_message_t *request = client->message;
isc_result_t result;
dns_name_t *zonename;
dns_rdataset_t *zone_rdataset;
dns_zone_t *zone = NULL;
char str[DNS_NAME_FORMATSIZE];
result = dns_message_firstname(request, DNS_SECTION_QUESTION);
if (result != ISC_R_SUCCESS) {
notify_log(ISC_LOG_INFO, "notify question section empty");
goto failure;
}
zonename = NULL;
dns_message_currentname(request, DNS_SECTION_QUESTION, &zonename);
zone_rdataset = ISC_LIST_HEAD(zonename->list);
if (ISC_LIST_NEXT(zone_rdataset, link) != NULL) {
notify_log(ISC_LOG_INFO,
"notify question section contains multiple RRs");
goto failure;
}
result = dns_message_nextname(request, DNS_SECTION_ZONE);
if (result != ISC_R_NOMORE) {
notify_log(ISC_LOG_INFO,
"notify question section contains multiple RRs");
goto failure;
}
if (zone_rdataset->type != dns_rdatatype_soa) {
notify_log(ISC_LOG_INFO,
"notify question section contains no SOA");
goto failure;
}
result = dns_zt_find(client->view->zonetable, zonename, 0, NULL,
&zone);
if (result != ISC_R_SUCCESS) {
dns_name_format(zonename, str, sizeof(str));
notify_log(ISC_LOG_INFO,
"received notify for zone '%s': not authoritative",
str);
goto failure;
}
switch(dns_zone_gettype(zone)) {
case dns_zone_master:
case dns_zone_slave:
case dns_zone_stub:
respond(client, dns_zone_notifyreceive(zone,
ns_client_getsockaddr(client), request));
break;
default:
dns_name_format(zonename, str, sizeof(str));
notify_log(ISC_LOG_INFO,
"received notify for zone '%s': not authoritative",
str);
goto failure;
}
dns_zone_detach(&zone);
return;
failure:
if (zone != NULL)
dns_zone_detach(&zone);
respond(client, result);
}