static void defer_callback(AvahiTimeEvent *e, void *userdata) {
AvahiSDomainBrowser *b = userdata;
AvahiStringList *l;
assert(e);
assert(b);
assert(b->type == AVAHI_DOMAIN_BROWSER_BROWSE);
avahi_time_event_free(b->defer_event);
b->defer_event = NULL;
/* Increase ref counter */
inc_ref(b);
for (l = b->server->config.browse_domains; l; l = l->next) {
/* Check whether this object still exists outside our own
* stack frame */
if (b->ref <= 1)
break;
b->callback(b, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, AVAHI_BROWSER_NEW, (char*) l->text, AVAHI_LOOKUP_RESULT_STATIC, b->userdata);
}
if (b->ref > 1) {
/* If the ALL_FOR_NOW event has already been scheduled, execute it now */
if (b->all_for_now_scheduled)
b->callback(b, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, AVAHI_BROWSER_ALL_FOR_NOW, NULL, 0, b->userdata);
}
/* Decrease ref counter */
avahi_s_domain_browser_free(b);
}
void avahi_dbus_domain_browser_free(DomainBrowserInfo *i) {
assert(i);
if (i->domain_browser)
avahi_s_domain_browser_free(i->domain_browser);
dbus_connection_unregister_object_path(server->bus, i->path);
avahi_free(i->path);
AVAHI_LLIST_REMOVE(DomainBrowserInfo, domain_browsers, i->client->domain_browsers, i);
i->client->n_objects--;
assert(i->client->n_objects >= 0);
avahi_free(i);
}
AvahiSDomainBrowser *avahi_s_domain_browser_prepare(
AvahiServer *server,
AvahiIfIndex interface,
AvahiProtocol protocol,
const char *domain,
AvahiDomainBrowserType type,
AvahiLookupFlags flags,
AvahiSDomainBrowserCallback callback,
void* userdata) {
static const char * const type_table[AVAHI_DOMAIN_BROWSER_MAX] = {
"b",
"db",
"r",
"dr",
"lb"
};
AvahiSDomainBrowser *b;
AvahiKey *k = NULL;
char n[AVAHI_DOMAIN_NAME_MAX];
int r;
assert(server);
assert(callback);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, type < AVAHI_DOMAIN_BROWSER_MAX, AVAHI_ERR_INVALID_FLAGS);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_FLAGS_VALID(flags, AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
if (!domain)
domain = server->domain_name;
if ((r = avahi_service_name_join(n, sizeof(n), type_table[type], "_dns-sd._udp", domain)) < 0) {
avahi_server_set_errno(server, r);
return NULL;
}
if (!(b = avahi_new(AvahiSDomainBrowser, 1))) {
avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
return NULL;
}
b->ref = 1;
b->server = server;
b->callback = callback;
b->userdata = userdata;
b->record_browser = NULL;
b->type = type;
b->all_for_now_scheduled = 0;
b->defer_event = NULL;
AVAHI_LLIST_PREPEND(AvahiSDomainBrowser, browser, server->domain_browsers, b);
if (!(k = avahi_key_new(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR))) {
avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
goto fail;
}
if (!(b->record_browser = avahi_s_record_browser_prepare(server, interface, protocol, k, flags, record_browser_callback, b)))
goto fail;
avahi_key_unref(k);
if (type == AVAHI_DOMAIN_BROWSER_BROWSE && b->server->config.browse_domains)
b->defer_event = avahi_time_event_new(server->time_event_queue, NULL, defer_callback, b);
return b;
fail:
if (k)
avahi_key_unref(k);
avahi_s_domain_browser_free(b);
return NULL;
}
