#include <config.h>
#endif
-#include "subscribe.h"
-#include "util.h"
+#include <stdlib.h>
-struct AvahiHostNameResolver {
+#include <avahi-common/domain.h>
+#include <avahi-common/timeval.h>
+#include <avahi-common/malloc.h>
+#include <avahi-common/error.h>
+
+#include "browse.h"
+#include "log.h"
+
+#define TIMEOUT_MSEC 1000
+
+struct AvahiSHostNameResolver {
AvahiServer *server;
- gchar *host_name;
+ char *host_name;
- AvahiRecordResolver *record_resolver_a;
- AvahiRecordResolver *record_resolver_aaaa;
+ AvahiSRecordBrowser *record_browser_a;
+ AvahiSRecordBrowser *record_browser_aaaa;
- AvahiHostNameResolverCallback callback;
- gpointer userdata;
+ AvahiSHostNameResolverCallback callback;
+ void* userdata;
- AVAHI_LLIST_FIELDS(AvahiHostNameResolver, resolver);
-};
+ AvahiRecord *address_record;
+ AvahiIfIndex interface;
+ AvahiProtocol protocol;
-static void record_resolver_callback(AvahiRecordResolver*rr, gint interface, guchar protocol, AvahiBrowserEvent event, AvahiRecord *record, gpointer userdata) {
- AvahiHostNameResolver *r = userdata;
- AvahiAddress a;
+ AvahiTimeEvent *time_event;
- g_assert(rr);
- g_assert(record);
- g_assert(r);
+ AVAHI_LLIST_FIELDS(AvahiSHostNameResolver, resolver);
+};
- switch (record->key->type) {
- case AVAHI_DNS_TYPE_A:
- a.family = AF_INET;
- a.data.ipv4 = record->data.a.address;
- break;
+static void finish(AvahiSHostNameResolver *r, AvahiResolverEvent event) {
+ assert(r);
- case AVAHI_DNS_TYPE_AAAA:
- a.family = AF_INET6;
- a.data.ipv6 = record->data.aaaa.address;
- break;
+ if (r->time_event) {
+ avahi_time_event_free(r->time_event);
+ r->time_event = NULL;
+ }
- default:
- g_assert(FALSE);
+ if (event == AVAHI_RESOLVER_TIMEOUT)
+ r->callback(r, r->interface, r->protocol, AVAHI_RESOLVER_TIMEOUT, r->host_name, NULL, r->userdata);
+ else {
+ AvahiAddress a;
+
+ assert(event == AVAHI_RESOLVER_FOUND);
+ assert(r->address_record);
+
+ switch (r->address_record->key->type) {
+ case AVAHI_DNS_TYPE_A:
+ a.family = AVAHI_PROTO_INET;
+ a.data.ipv4 = r->address_record->data.a.address;
+ break;
+
+ case AVAHI_DNS_TYPE_AAAA:
+ a.family = AVAHI_PROTO_INET6;
+ a.data.ipv6 = r->address_record->data.aaaa.address;
+ break;
+
+ default:
+ abort();
+ }
+
+ r->callback(r, r->interface, r->protocol, AVAHI_RESOLVER_FOUND, r->address_record->key->name, &a, r->userdata);
}
+}
- r->callback(r, interface, protocol, event, record->key->name, &a, r->userdata);
+static void time_event_callback(AvahiTimeEvent *e, void *userdata) {
+ AvahiSHostNameResolver *r = userdata;
+
+ assert(e);
+ assert(r);
+
+ finish(r, AVAHI_RESOLVER_TIMEOUT);
}
-AvahiHostNameResolver *avahi_host_name_resolver_new(AvahiServer *s, gint interface, guchar protocol, const gchar *host_name, AvahiHostNameResolverCallback callback, gpointer userdata) {
- AvahiHostNameResolver *r;
+static void start_timeout(AvahiSHostNameResolver *r) {
+ struct timeval tv;
+ assert(r);
+
+ if (r->time_event)
+ return;
+
+ 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 record_browser_callback(AvahiSRecordBrowser*rr, AvahiIfIndex interface, AvahiProtocol protocol, AvahiBrowserEvent event, AvahiRecord *record, void* userdata) {
+ AvahiSHostNameResolver *r = userdata;
+
+ assert(rr);
+ assert(record);
+ assert(r);
+
+ assert(record->key->type == AVAHI_DNS_TYPE_A || record->key->type == AVAHI_DNS_TYPE_AAAA);
+
+ if (event == AVAHI_BROWSER_NEW) {
+
+ 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->address_record) {
+ r->address_record = avahi_record_ref(record);
+
+ finish(r, AVAHI_RESOLVER_FOUND);
+ }
+ } else {
+
+ assert(event == AVAHI_BROWSER_REMOVE);
+
+ if (r->address_record && avahi_record_equal_no_ttl(record, r->address_record)) {
+ avahi_record_unref(r->address_record);
+ r->address_record = NULL;
+
+ /** Look for a replacement */
+ if (r->record_browser_aaaa)
+ avahi_s_record_browser_restart(r->record_browser_aaaa);
+ if (r->record_browser_a)
+ avahi_s_record_browser_restart(r->record_browser_a);
+
+ start_timeout(r);
+ }
+ }
+}
+
+AvahiSHostNameResolver *avahi_s_host_name_resolver_new(AvahiServer *server, AvahiIfIndex interface, AvahiProtocol protocol, const char *host_name, AvahiProtocol aprotocol, AvahiSHostNameResolverCallback callback, void* userdata) {
+ AvahiSHostNameResolver *r;
AvahiKey *k;
+
+ assert(server);
+ assert(host_name);
+ assert(callback);
- g_assert(s);
- g_assert(host_name);
- g_assert(callback);
+ assert(aprotocol == AVAHI_PROTO_UNSPEC || aprotocol == AVAHI_PROTO_INET || aprotocol == AVAHI_PROTO_INET6);
- r = g_new(AvahiHostNameResolver, 1);
- r->server = s;
+ if (!avahi_is_valid_domain_name(host_name)) {
+ avahi_server_set_errno(server, AVAHI_ERR_INVALID_HOST_NAME);
+ return NULL;
+ }
+
+ if (!(r = avahi_new(AvahiSHostNameResolver, 1))) {
+ avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
+ return NULL;
+ }
+
+ r->server = server;
r->host_name = avahi_normalize_name(host_name);
r->callback = callback;
r->userdata = userdata;
+ r->address_record = NULL;
+ r->interface = interface;
+ r->protocol = protocol;
+
+ r->record_browser_a = r->record_browser_aaaa = NULL;
- k = avahi_key_new(host_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A);
- r->record_resolver_a = avahi_record_resolver_new(s, interface, protocol, k, record_resolver_callback, r);
- avahi_key_unref(k);
+ r->time_event = NULL;
+ start_timeout(r);
- k = avahi_key_new(host_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA);
- r->record_resolver_aaaa = avahi_record_resolver_new(s, interface, protocol, k, record_resolver_callback, r);
- avahi_key_unref(k);
+ AVAHI_LLIST_PREPEND(AvahiSHostNameResolver, resolver, server->host_name_resolvers, r);
- AVAHI_LLIST_PREPEND(AvahiHostNameResolver, resolver, s->host_name_resolvers, r);
+ r->record_browser_aaaa = r->record_browser_a = NULL;
+ if (aprotocol == AVAHI_PROTO_INET || aprotocol == AVAHI_PROTO_UNSPEC) {
+ k = avahi_key_new(host_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A);
+ r->record_browser_a = avahi_s_record_browser_new(server, interface, protocol, k, record_browser_callback, r);
+ avahi_key_unref(k);
+
+ if (!r->record_browser_a)
+ goto fail;
+ }
+
+ if (aprotocol == AVAHI_PROTO_INET6 || aprotocol == AVAHI_PROTO_UNSPEC) {
+ k = avahi_key_new(host_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA);
+ r->record_browser_aaaa = avahi_s_record_browser_new(server, interface, protocol, k, record_browser_callback, r);
+ avahi_key_unref(k);
+
+ if (!r->record_browser_aaaa)
+ goto fail;
+ }
+
+ assert(r->record_browser_aaaa || r->record_browser_a);
+
return r;
+
+fail:
+ avahi_s_host_name_resolver_free(r);
+ return NULL;
}
-void avahi_host_name_resolver_free(AvahiHostNameResolver *r) {
- g_assert(r);
+void avahi_s_host_name_resolver_free(AvahiSHostNameResolver *r) {
+ assert(r);
- AVAHI_LLIST_REMOVE(AvahiHostNameResolver, resolver, r->server->host_name_resolvers, r);
+ AVAHI_LLIST_REMOVE(AvahiSHostNameResolver, resolver, r->server->host_name_resolvers, r);
- avahi_record_resolver_free(r->record_resolver_a);
- avahi_record_resolver_free(r->record_resolver_aaaa);
- g_free(r->host_name);
- g_free(r);
+ if (r->record_browser_a)
+ avahi_s_record_browser_free(r->record_browser_a);
+
+ if (r->record_browser_aaaa)
+ avahi_s_record_browser_free(r->record_browser_aaaa);
+
+ if (r->time_event)
+ avahi_time_event_free(r->time_event);
+
+ if (r->address_record)
+ avahi_record_unref(r->address_record);
+
+ avahi_free(r->host_name);
+ avahi_free(r);
}
projects / catta / blobdiff