add goodbye messages when service disappear

Signed-off-by: John Crispin <blogic@openwrt.org>

diff --git a/service.c b/service.c
index bd36132..9e2287f 100644 (file)
--- a/service.c
+++ b/service.c
@@ -154,33 +154,38 @@ service_reply_a(struct interface *iface, int type, int ttl)
        freeifaddrs(ifap);
 }
 
-void
-service_reply(struct interface *iface, const char *match, int ttl)
+static void
+service_reply_single(struct interface *iface, struct service *s, const char *match, int ttl)
 {
-       struct service *s;
+       const char *host = service_name(s->service);
+       char *service = strstr(host, "._");
 
-       vlist_for_each_element(&services, s, node) {
-               const char *host = service_name(s->service);
-               char *service = strstr(host, "._");
+       if (!s->active || !service || !service_timeout(s))
+               return;
 
-               if (!s->active || !service || !service_timeout(s))
-                       continue;
+       service++;
 
-               service++;
+       if (match && strcmp(match, s->service))
+               return;
 
-               if (match && strcmp(match, s->service))
-                       continue;
+       dns_init_answer();
+       service_add_ptr(service_name(s->service), ttl);
+       dns_send_answer(iface, service);
 
-               dns_init_answer();
-               service_add_ptr(service_name(s->service), ttl);
-               dns_send_answer(iface, service);
+       dns_init_answer();
+       service_add_srv(s, ttl);
+       if (s->txt && s->txt_len)
+               dns_add_answer(TYPE_TXT, (uint8_t *) s->txt, s->txt_len, ttl);
+       dns_send_answer(iface, host);
+}
 
-               dns_init_answer();
-               service_add_srv(s, ttl);
-               if (s->txt && s->txt_len)
-                       dns_add_answer(TYPE_TXT, (uint8_t *) s->txt, s->txt_len, ttl);
-               dns_send_answer(iface, host);
-       }
+void
+service_reply(struct interface *iface, const char *match, int ttl)
+{
+       struct service *s;
+
+       vlist_for_each_element(&services, s, node)
+               service_reply_single(iface, s, match, ttl);
 
        if (match)
                return;
@@ -226,12 +231,18 @@ static void
 service_update(struct vlist_tree *tree, struct vlist_node *node_new,
               struct vlist_node *node_old)
 {
+       struct interface *iface;
        struct service *s;
 
        if (!node_old)
                return;
 
        s = container_of(node_old, struct service, node);
+
+       if (!node_new)
+               vlist_for_each_element(&interfaces, iface, node)
+                       service_reply_single(iface, s, NULL, 0);
+
        free(s);
 }