static void sender_timeout_callback(AvahiTimeEvent *e, void *userdata) {
AvahiWideAreaLookup *l = userdata;
struct timeval tv;
assert(l);
/* Try another DNS server after three retries */
if (l->n_send >= 3 && avahi_address_cmp(&l->engine->dns_servers[l->engine->current_dns_server], &l->dns_server_used) == 0) {
next_dns_server(l->engine);
if (avahi_address_cmp(&l->engine->dns_servers[l->engine->current_dns_server], &l->dns_server_used) == 0)
/* There is no other DNS server, fail */
l->n_send = 1000;
}
if (l->n_send >= 6) {
avahi_log_warn(__FILE__": Query timed out.");
avahi_server_set_errno(l->engine->server, AVAHI_ERR_TIMEOUT);
l->callback(l->engine, AVAHI_BROWSER_FAILURE, AVAHI_LOOKUP_RESULT_WIDE_AREA, NULL, l->userdata);
lookup_stop(l);
return;
}
assert(l->packet);
send_to_dns_server(l, l->packet);
l->n_send++;
avahi_time_event_update(e, avahi_elapse_time(&tv, 1000, 0));
}
static void lookup_destroy(AvahiWideAreaLookup *l) {
AvahiWideAreaLookup *t;
assert(l);
lookup_stop(l);
t = avahi_hashmap_lookup(l->engine->lookups_by_key, l->key);
AVAHI_LLIST_REMOVE(AvahiWideAreaLookup, by_key, t, l);
if (t)
avahi_hashmap_replace(l->engine->lookups_by_key, avahi_key_ref(l->key), t);
else
avahi_hashmap_remove(l->engine->lookups_by_key, l->key);
AVAHI_LLIST_REMOVE(AvahiWideAreaLookup, lookups, l->engine->lookups, l);
avahi_hashmap_remove(l->engine->lookups_by_id, &l->id);
avahi_dns_packet_free(l->packet);
if (l->key)
avahi_key_unref(l->key);
if (l->cname_key)
avahi_key_unref(l->cname_key);
avahi_free(l);
}
/* Lookup callbacks */
void
on_lookup_activate (GtkWidget * widget, gpointer data)
{
Netinfo *lookup = data;
GtkEntry *entry_host;
gchar *text;
g_return_if_fail (lookup != NULL);
if (lookup->running) {
lookup_stop (lookup);
} else {
if (netinfo_validate_domain (lookup)) {
entry_host = GTK_ENTRY (
gtk_bin_get_child (GTK_BIN (lookup->host)));
text = g_strdup (gtk_entry_get_text (entry_host));
gn_combo_history_add (lookup->history, text);
g_free (text);
lookup_do (lookup);
}
}
}
void avahi_wide_area_lookup_free(AvahiWideAreaLookup *l) {
assert(l);
if (l->dead)
return;
l->dead = 1;
l->engine->cleanup_dead = 1;
lookup_stop(l);
}
static void handle_packet(AvahiWideAreaLookupEngine *e, AvahiDnsPacket *p) {
AvahiWideAreaLookup *l = NULL;
int i, r;
AvahiBrowserEvent final_event = AVAHI_BROWSER_ALL_FOR_NOW;
assert(e);
assert(p);
/* Some superficial validity tests */
if (avahi_dns_packet_check_valid(p) < 0 || avahi_dns_packet_is_query(p)) {
avahi_log_warn(__FILE__": Ignoring invalid response for wide area datagram.");
goto finish;
}
/* Look for the lookup that issued this query */
if (!(l = find_lookup(e, avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ID))) || l->dead)
goto finish;
/* Check whether this a packet indicating a failure */
if ((r = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_FLAGS) & 15) != 0 ||
avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) == 0) {
avahi_server_set_errno(e->server, r == 0 ? AVAHI_ERR_NOT_FOUND : map_dns_error(r));
/* Tell the user about the failure */
final_event = AVAHI_BROWSER_FAILURE;
/* We go on here, since some of the records contained in the
reply might be interesting in some way */
}
/* Skip over the question */
for (i = (int) avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_QDCOUNT); i > 0; i--) {
AvahiKey *k;
if (!(k = avahi_dns_packet_consume_key(p, NULL))) {
avahi_log_warn(__FILE__": Wide area response packet too short or invalid while reading question key. (Maybe a UTF-8 problem?)");
avahi_server_set_errno(e->server, AVAHI_ERR_INVALID_PACKET);
final_event = AVAHI_BROWSER_FAILURE;
goto finish;
}
avahi_key_unref(k);
}
/* Process responses */
for (i = (int) avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) +
(int) avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_NSCOUNT) +
(int) avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ARCOUNT); i > 0; i--) {
AvahiRecord *rr;
if (!(rr = avahi_dns_packet_consume_record(p, NULL))) {
avahi_log_warn(__FILE__": Wide area response packet too short or invalid while reading response record. (Maybe a UTF-8 problem?)");
avahi_server_set_errno(e->server, AVAHI_ERR_INVALID_PACKET);
final_event = AVAHI_BROWSER_FAILURE;
goto finish;
}
add_to_cache(e, rr);
avahi_record_unref(rr);
}
finish:
if (l && !l->dead) {
if (l->callback)
l->callback(e, final_event, AVAHI_LOOKUP_RESULT_WIDE_AREA, NULL, l->userdata);
lookup_stop(l);
}
}
