static void
xfrd_notify_send_udp(struct notify_zone_t* zone, buffer_type* packet)
{
int fd;
if(zone->notify_send_enable) {
notify_send_disable(zone);
}
/* Set timeout for next reply */
zone->notify_timeout.tv_sec = XFRD_NOTIFY_RETRY_TIMOUT;
/* send NOTIFY to secondary. */
xfrd_setup_packet(packet, TYPE_SOA, CLASS_IN, zone->apex,
qid_generate());
zone->notify_query_id = ID(packet);
OPCODE_SET(packet, OPCODE_NOTIFY);
AA_SET(packet);
if(zone->current_soa->serial != 0) {
/* add current SOA to answer section */
ANCOUNT_SET(packet, 1);
xfrd_write_soa_buffer(packet, zone->apex, zone->current_soa);
}
if(zone->notify_current->key_options) {
xfrd_tsig_sign_request(packet, &zone->notify_tsig, zone->notify_current);
}
buffer_flip(packet);
fd = xfrd_send_udp(zone->notify_current, packet,
zone->options->pattern->outgoing_interface);
if(fd == -1) {
log_msg(LOG_ERR, "xfrd: zone %s: could not send notify #%d to %s",
zone->apex_str, zone->notify_retry,
zone->notify_current->ip_address_spec);
event_set(&zone->notify_send_handler, -1, EV_TIMEOUT,
xfrd_handle_notify_send, zone);
if(event_base_set(xfrd->event_base, &zone->notify_send_handler) != 0)
log_msg(LOG_ERR, "notify_send: event_base_set failed");
if(evtimer_add(&zone->notify_send_handler, &zone->notify_timeout) != 0)
log_msg(LOG_ERR, "notify_send: evtimer_add failed");
zone->notify_send_enable = 1;
return;
}
event_set(&zone->notify_send_handler, fd, EV_READ | EV_TIMEOUT,
xfrd_handle_notify_send, zone);
if(event_base_set(xfrd->event_base, &zone->notify_send_handler) != 0)
log_msg(LOG_ERR, "notify_send: event_base_set failed");
if(event_add(&zone->notify_send_handler, &zone->notify_timeout) != 0)
log_msg(LOG_ERR, "notify_send: evtimer_add failed");
zone->notify_send_enable = 1;
DEBUG(DEBUG_XFRD,1, (LOG_INFO, "xfrd: zone %s: sent notify #%d to %s",
zone->apex_str, zone->notify_retry,
zone->notify_current->ip_address_spec));
}
void
xfrd_setup_packet(buffer_type* packet,
uint16_t type, uint16_t klass, const dname_type* dname)
{
/* Set up the header */
buffer_clear(packet);
ID_SET(packet, qid_generate());
FLAGS_SET(packet, 0);
OPCODE_SET(packet, OPCODE_QUERY);
QDCOUNT_SET(packet, 1);
ANCOUNT_SET(packet, 0);
NSCOUNT_SET(packet, 0);
ARCOUNT_SET(packet, 0);
buffer_skip(packet, QHEADERSZ);
/* The question record. */
buffer_write(packet, dname_name(dname), dname->name_size);
buffer_write_u16(packet, type);
buffer_write_u16(packet, klass);
}