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/*
* Copyright (C) 2014 John Crispin <blogic@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <sys/types.h>
#include <stdio.h>
#include <libubox/uloop.h>
#include "cache.h"
#include "dns.h"
#include "util.h"
#include "service.h"
#include "announce.h"
#include "interface.h"
#define TTL_TIMEOUT 75
enum {
STATE_PROBE1 = 0,
STATE_PROBE2,
STATE_PROBE3,
STATE_PROBE_WAIT,
STATE_PROBE_END,
STATE_ANNOUNCE,
};
int announce_ttl = 75 * 60;
static void
announce_timer(struct uloop_timeout *timeout)
{
struct interface *iface = container_of(timeout, struct interface, announce_timer);
switch (iface->announce_state) {
case STATE_PROBE1:
case STATE_PROBE2:
case STATE_PROBE3:
dns_send_question(iface, NULL, mdns_hostname_local, TYPE_ANY, 1);
uloop_timeout_set(timeout, 250);
iface->announce_state++;
break;
case STATE_PROBE_WAIT:
uloop_timeout_set(timeout, 500);
iface->announce_state++;
break;
case STATE_PROBE_END:
if (cache_host_is_known(mdns_hostname_local)) {
fprintf(stderr, "the host %s already exists. stopping announce service\n", mdns_hostname_local);
return;
}
iface->announce_state++;
/* Fall through */
case STATE_ANNOUNCE:
dns_reply_a(iface, NULL, announce_ttl, NULL);
dns_reply_a_additional(iface, NULL, announce_ttl);
service_announce_services(iface, NULL, announce_ttl);
uloop_timeout_set(timeout, announce_ttl * 800);
break;
}
}
void
announce_init(struct interface *iface)
{
iface->announce_state = STATE_PROBE1;
iface->announce_timer.cb = announce_timer;
uloop_timeout_set(&iface->announce_timer, 100);
}
void
announce_free(struct interface *iface)
{
uloop_timeout_cancel(&iface->announce_timer);
}
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