clean up hostname handling, make service_name() static
[project/mdnsd.git] / announce.c
1 /*
2 * Copyright (C) 2014 John Crispin <blogic@openwrt.org>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License version 2.1
6 * as published by the Free Software Foundation
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13
14 #include <sys/types.h>
15
16 #include <stdio.h>
17
18 #include <libubox/uloop.h>
19
20 #include "cache.h"
21 #include "dns.h"
22 #include "util.h"
23 #include "service.h"
24 #include "announce.h"
25 #include "interface.h"
26
27 #define TTL_TIMEOUT 75
28
29 enum {
30 STATE_PROBE1 = 0,
31 STATE_PROBE2,
32 STATE_PROBE3,
33 STATE_PROBE_WAIT,
34 STATE_PROBE_END,
35 STATE_ANNOUNCE,
36 };
37
38 int announce_ttl = 75 * 60;
39
40 static void
41 announce_timer(struct uloop_timeout *timeout)
42 {
43 struct interface *iface = container_of(timeout, struct interface, announce_timer);
44
45 switch (iface->announce_state) {
46 case STATE_PROBE1:
47 case STATE_PROBE2:
48 case STATE_PROBE3:
49 dns_send_question(iface, mdns_hostname_local, TYPE_ANY);
50 uloop_timeout_set(timeout, 250);
51 iface->announce_state++;
52 break;
53
54 case STATE_PROBE_WAIT:
55 uloop_timeout_set(timeout, 500);
56 iface->announce_state++;
57 break;
58
59 case STATE_PROBE_END:
60 if (cache_host_is_known(mdns_hostname_local)) {
61 fprintf(stderr, "the host %s already exists. stopping announce service\n", mdns_hostname_local);
62 return;
63 }
64 iface->announce_state++;
65
66 case STATE_ANNOUNCE:
67 service_announce(iface);
68 uloop_timeout_set(timeout, announce_ttl * 800);
69 break;
70 }
71 }
72
73 void
74 announce_init(struct interface *iface)
75 {
76 iface->announce_state = STATE_PROBE1;
77 iface->announce_timer.cb = announce_timer;
78 uloop_timeout_set(&iface->announce_timer, 100);
79 }
80
81 void
82 announce_free(struct interface *iface)
83 {
84 uloop_timeout_cancel(&iface->announce_timer);
85 }