static void lookup_llmnr_callback(
AvahiLLMNRLookupEngine *e,
AvahiIfIndex interface,
AvahiProtocol protocol,
AvahiBrowserEvent event,
AvahiLookupResultFlags flags,
AvahiRecord *r,
void *userdata) {
AvahiSRBLookup *l = userdata;
AvahiSRecordBrowser *b;
assert(e);
assert(l);
/* assert(AVAHI_IF_VALID(idx) && idx != -1);
assert(AVAHI_PROTO_VALID(protocol) && protocol != -1);*/
b = l->record_browser;
if (b->dead)
return;
lookup_ref(l);
switch(event) {
case AVAHI_BROWSER_NEW:
assert(r);
if (r->key->clazz == AVAHI_DNS_CLASS_IN &&
r->key->type == AVAHI_DNS_TYPE_CNAME)
lookup_handle_cname(l, interface, protocol, b->flags, r);
else
/* We are discrading packets originating from our own interface/s
or should we accept them? TODO AVAHI_LOOKUP_RESULT_LOCAL*/
b->callback(b, interface, protocol, event, r, flags, b->userdata);
break;
case AVAHI_BROWSER_REMOVE:
case AVAHI_BROWSER_CACHE_EXHAUSTED:
abort();
case AVAHI_BROWSER_ALL_FOR_NOW:
b->callback(b, interface, protocol, event, NULL, flags, b->userdata);
break;
case AVAHI_BROWSER_FAILURE:
/* This event states that LLMNR query has been sent three times on specified
interface and protocol and we don't have any records available */
/*b->callback(b, interface, protocol, event, NULL, flags, b->userdata);
lookup_ref(l);*/
abort();
}
lookup_unref(l);
}
static void defer_callback(AVAHI_GCC_UNUSED AvahiTimeEvent *e, void *userdata) {
AvahiSRecordBrowser *b = userdata;
int n = 0;
assert(b);
assert(!b->dead);
/* Remove the defer timeout */
if (b->defer_time_event) {
avahi_time_event_free(b->defer_time_event);
b->defer_time_event = NULL;
}
/* Create initial query */
assert(!b->root_lookup);
b->root_lookup = lookup_add(b, b->interface, b->protocol, b->flags, b->key);
assert(b->root_lookup);
n = lookup_go(b->root_lookup);
if (b->dead)
return;
if (n < 0) {
/* sending of the initial query failed */
avahi_server_set_errno(b->server, AVAHI_ERR_FAILURE);
b->callback(
b, b->interface, b->protocol, AVAHI_BROWSER_FAILURE, NULL,
b->flags & AVAHI_LOOKUP_USE_WIDE_AREA ? AVAHI_LOOKUP_RESULT_WIDE_AREA :
(b->flags & AVAHI_LOOKUP_RESULT_MULTICAST ? AVAHI_LOOKUP_RESULT_MULTICAST : AVAHI_LOOKUP_RESULT_LLMNR),
b->userdata);
browser_cancel(b);
return;
}
/* Tell the client that we're done with the cache */
b->callback(
b, b->interface, b->protocol, AVAHI_BROWSER_CACHE_EXHAUSTED, NULL,
b->flags & AVAHI_LOOKUP_USE_WIDE_AREA ? AVAHI_LOOKUP_RESULT_WIDE_AREA :
(b->flags & AVAHI_LOOKUP_RESULT_MULTICAST ? AVAHI_LOOKUP_RESULT_MULTICAST : AVAHI_LOOKUP_RESULT_LLMNR),
b->userdata);
if (!b->dead && b->root_lookup &&
(b->root_lookup->flags & AVAHI_LOOKUP_USE_WIDE_AREA) &&
n > 0 ) {
/* If we do wide area lookups and the the cache contained
* entries, we assume that it is complete, and tell the user
* so by firing ALL_FOR_NOW. */
b->callback(b, b->interface, b->protocol, AVAHI_BROWSER_ALL_FOR_NOW, NULL, AVAHI_LOOKUP_RESULT_LLMNR, b->userdata);
}
}
static void lookup_wide_area_callback(
AvahiWideAreaLookupEngine *e,
AvahiBrowserEvent event,
AvahiLookupResultFlags flags,
AvahiRecord *r,
void *userdata) {
AvahiSRBLookup *l = userdata;
AvahiSRecordBrowser *b;
assert(e);
assert(l);
assert(l->ref >= 1);
b = l->record_browser;
if (b->dead)
return;
lookup_ref(l);
switch (event) {
case AVAHI_BROWSER_NEW:
assert(r);
if (r->key->clazz == AVAHI_DNS_CLASS_IN &&
r->key->type == AVAHI_DNS_TYPE_CNAME)
/* It's a CNAME record, so let's follow it. We only follow it on wide area DNS! */
lookup_handle_cname(l, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, AVAHI_LOOKUP_USE_WIDE_AREA, r);
else {
/* It's a normal record, so let's call the user callback */
assert(avahi_key_equal(r->key, l->key));
b->callback(b, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, event, r, flags, b->userdata);
}
break;
case AVAHI_BROWSER_REMOVE:
case AVAHI_BROWSER_CACHE_EXHAUSTED:
/* Not defined for wide area DNS */
abort();
case AVAHI_BROWSER_ALL_FOR_NOW:
case AVAHI_BROWSER_FAILURE:
b->callback(b, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, event, NULL, flags, b->userdata);
break;
}
lookup_unref(l);
}
static void lookup_multicast_callback(
AvahiMulticastLookupEngine *e,
AvahiIfIndex interface,
AvahiProtocol protocol,
AvahiBrowserEvent event,
AvahiLookupResultFlags flags,
AvahiRecord *r,
void *userdata) {
AvahiSRBLookup *l = userdata;
AvahiSRecordBrowser *b;
assert(e);
assert(l);
b = l->record_browser;
if (b->dead)
return;
lookup_ref(l);
switch (event) {
case AVAHI_BROWSER_NEW:
assert(r);
if (r->key->clazz == AVAHI_DNS_CLASS_IN &&
r->key->type == AVAHI_DNS_TYPE_CNAME)
/* It's a CNAME record, so let's follow it. We allow browsing on both multicast and wide area. */
lookup_handle_cname(l, interface, protocol, b->flags, r);
else {
/* It's a normal record, so let's call the user callback */
if (avahi_server_is_record_local(b->server, interface, protocol, r))
flags |= AVAHI_LOOKUP_RESULT_LOCAL;
b->callback(b, interface, protocol, event, r, flags, b->userdata);
}
break;
case AVAHI_BROWSER_REMOVE:
assert(r);
if (r->key->clazz == AVAHI_DNS_CLASS_IN &&
r->key->type == AVAHI_DNS_TYPE_CNAME)
/* It's a CNAME record, so let's drop that query! */
lookup_drop_cname(l, interface, protocol, 0, r);
else {
/* It's a normal record, so let's call the user callback */
assert(avahi_key_equal(b->key, l->key));
b->callback(b, interface, protocol, event, r, flags, b->userdata);
}
break;
case AVAHI_BROWSER_ALL_FOR_NOW:
b->callback(b, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, event, NULL, flags, b->userdata);
break;
case AVAHI_BROWSER_CACHE_EXHAUSTED:
case AVAHI_BROWSER_FAILURE:
/* Not defined for multicast DNS */
abort();
}
lookup_unref(l);
}
