#include "browse.h"
+#define TIMEOUT_MSEC 5000
+
struct AvahiSAddressResolver {
AvahiServer *server;
AvahiAddress address;
AvahiSAddressResolverCallback callback;
void* userdata;
+ AvahiRecord *ptr_record;
+ AvahiIfIndex interface;
+ AvahiProtocol protocol;
+ AvahiLookupResultFlags flags;
+
+ int retry_with_multicast;
+ AvahiKey *key;
+
AvahiTimeEvent *time_event;
AVAHI_LLIST_FIELDS(AvahiSAddressResolver, resolver);
};
-static void finish(AvahiSAddressResolver *r, AvahiIfIndex interface, AvahiProtocol protocol, AvahiResolverEvent event, AvahiRecord *record) {
+static void finish(AvahiSAddressResolver *r, AvahiResolverEvent event) {
assert(r);
- avahi_s_record_browser_free(r->record_browser);
- r->record_browser = NULL;
-
if (r->time_event) {
avahi_time_event_free(r->time_event);
r->time_event = NULL;
}
- r->callback(r, interface, protocol, event, &r->address, record ? record->data.ptr.name : NULL, r->userdata);
+ switch (event) {
+ case AVAHI_RESOLVER_FAILURE:
+ r->callback(r, r->interface, r->protocol, event, &r->address, NULL, r->flags, r->userdata);
+ break;
+
+ case AVAHI_RESOLVER_FOUND:
+ assert(r->ptr_record);
+ r->callback(r, r->interface, r->protocol, event, &r->address, r->ptr_record->data.ptr.name, r->flags, r->userdata);
+ break;
+ }
}
-static void record_browser_callback(AvahiSRecordBrowser*rr, AvahiIfIndex interface, AvahiProtocol protocol, AvahiBrowserEvent event, AvahiRecord *record, void* userdata) {
+static void time_event_callback(AvahiTimeEvent *e, void *userdata) {
AvahiSAddressResolver *r = userdata;
+
+ assert(e);
+ assert(r);
- assert(rr);
- assert(record);
+ avahi_server_set_errno(r->server, AVAHI_ERR_TIMEOUT);
+ finish(r, AVAHI_RESOLVER_FAILURE);
+}
+
+static void start_timeout(AvahiSAddressResolver *r) {
+ struct timeval tv;
assert(r);
- if (!(event == AVAHI_BROWSER_NEW))
+ if (r->time_event)
return;
- assert(record->key->type == AVAHI_DNS_TYPE_PTR);
-
- finish(r, interface, protocol, AVAHI_RESOLVER_FOUND, record);
+ avahi_elapse_time(&tv, TIMEOUT_MSEC, 0);
+ r->time_event = avahi_time_event_new(r->server->time_event_queue, &tv, time_event_callback, r);
}
-static void time_event_callback(AvahiTimeEvent *e, void *userdata) {
- AvahiSAddressResolver *r = userdata;
+static void record_browser_callback(
+ AvahiSRecordBrowser*rr,
+ AvahiIfIndex interface,
+ AvahiProtocol protocol,
+ AvahiBrowserEvent event,
+ AvahiRecord *record,
+ AvahiLookupResultFlags flags,
+ void* userdata) {
- assert(e);
+ AvahiSAddressResolver *r = userdata;
+
+ assert(rr);
assert(r);
- finish(r, -1, AVAHI_PROTO_UNSPEC, AVAHI_RESOLVER_TIMEOUT, NULL);
+
+ switch (event) {
+ case AVAHI_BROWSER_NEW:
+ assert(record);
+ assert(record->key->type == AVAHI_DNS_TYPE_PTR);
+
+ if (r->interface > 0 && interface != r->interface)
+ return;
+
+ if (r->protocol != AVAHI_PROTO_UNSPEC && protocol != r->protocol)
+ return;
+
+ if (r->interface <= 0)
+ r->interface = interface;
+
+ if (r->protocol == AVAHI_PROTO_UNSPEC)
+ r->protocol = protocol;
+
+ if (!r->ptr_record) {
+ r->ptr_record = avahi_record_ref(record);
+ r->flags = flags;
+
+ finish(r, AVAHI_RESOLVER_FOUND);
+ }
+ break;
+
+ case AVAHI_BROWSER_REMOVE:
+ assert(record);
+ assert(record->key->type == AVAHI_DNS_TYPE_PTR);
+
+ if (r->ptr_record && avahi_record_equal_no_ttl(record, r->ptr_record)) {
+ avahi_record_unref(r->ptr_record);
+ r->ptr_record = NULL;
+ r->flags = flags;
+
+ /** Look for a replacement */
+ avahi_s_record_browser_restart(r->record_browser);
+ start_timeout(r);
+ }
+
+ break;
+
+ case AVAHI_BROWSER_CACHE_EXHAUSTED:
+ case AVAHI_BROWSER_ALL_FOR_NOW:
+ break;
+
+ case AVAHI_BROWSER_FAILURE:
+
+ if (r->retry_with_multicast) {
+ r->retry_with_multicast = 0;
+
+ avahi_s_record_browser_free(r->record_browser);
+ r->record_browser = avahi_s_record_browser_new(r->server, r->interface, r->protocol, r->key, AVAHI_LOOKUP_USE_MULTICAST, record_browser_callback, r);
+
+ if (r->record_browser) {
+ start_timeout(r);
+ break;
+ }
+ }
+
+ r->flags = flags;
+ finish(r, AVAHI_RESOLVER_FAILURE);
+ break;
+ }
}
-AvahiSAddressResolver *avahi_s_address_resolver_new(AvahiServer *server, AvahiIfIndex interface, AvahiProtocol protocol, const AvahiAddress *address, AvahiSAddressResolverCallback callback, void* userdata) {
+AvahiSAddressResolver *avahi_s_address_resolver_new(
+ AvahiServer *server,
+ AvahiIfIndex interface,
+ AvahiProtocol protocol,
+ const AvahiAddress *address,
+ AvahiLookupFlags flags,
+ AvahiSAddressResolverCallback callback,
+ void* userdata) {
+
AvahiSAddressResolver *r;
AvahiKey *k;
char *n;
- struct timeval tv;
assert(server);
assert(address);
assert(callback);
- assert(address->family == AVAHI_PROTO_INET || address->family == AVAHI_PROTO_INET6);
+ assert(address->proto == AVAHI_PROTO_INET || address->proto == AVAHI_PROTO_INET6);
- if (address->family == AVAHI_PROTO_INET)
+ if (!AVAHI_IF_VALID(interface)) {
+ avahi_server_set_errno(server, AVAHI_ERR_INVALID_INTERFACE);
+ return NULL;
+ }
+
+ if (!AVAHI_FLAGS_VALID(flags, AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_MULTICAST)) {
+ avahi_server_set_errno(server, AVAHI_ERR_INVALID_FLAGS);
+ return NULL;
+ }
+
+ if (address->proto == AVAHI_PROTO_INET)
n = avahi_reverse_lookup_name_ipv4(&address->data.ipv4);
else
n = avahi_reverse_lookup_name_ipv6_arpa(&address->data.ipv6);
r->address = *address;
r->callback = callback;
r->userdata = userdata;
+ r->ptr_record = NULL;
+ r->interface = interface;
+ r->protocol = protocol;
+ r->flags = 0;
+ r->retry_with_multicast = 0;
+ r->key = k;
r->record_browser = NULL;
AVAHI_LLIST_PREPEND(AvahiSAddressResolver, resolver, server->address_resolvers, r);
- avahi_elapse_time(&tv, 1000, 0);
- if (!(r->time_event = avahi_time_event_new(server->time_event_queue, &tv, time_event_callback, r))) {
- avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
- avahi_s_address_resolver_free(r);
- avahi_key_unref(k);
- return NULL;
+ r->time_event = NULL;
+
+ if (!(flags & (AVAHI_LOOKUP_USE_MULTICAST|AVAHI_LOOKUP_USE_WIDE_AREA))) {
+
+ if (!server->wide_area_lookup_engine || !avahi_wide_area_has_servers(server->wide_area_lookup_engine))
+ flags |= AVAHI_LOOKUP_USE_MULTICAST;
+ else {
+ flags |= AVAHI_LOOKUP_USE_WIDE_AREA;
+ r->retry_with_multicast = 1;
+ }
}
- r->record_browser = avahi_s_record_browser_new(server, interface, protocol, k, record_browser_callback, r);
- avahi_key_unref(k);
+ r->record_browser = avahi_s_record_browser_new(server, interface, protocol, k, flags, record_browser_callback, r);
if (!r->record_browser) {
avahi_s_address_resolver_free(r);
return NULL;
}
+
+ start_timeout(r);
return r;
}
if (r->time_event)
avahi_time_event_free(r->time_event);
+
+ if (r->ptr_record)
+ avahi_record_unref(r->ptr_record);
+
+ if (r->key)
+ avahi_key_unref(r->key);
avahi_free(r);
}
projects / catta / blobdiff