fix: mDNS-Init nur einmal, Teilfehler wiederholbar

src/net/nl_mdns.c

@@ -13,7 +13,9 @@
 
 #define NL_MDNS_TTL 120
 
-static bool s_started;
+static bool s_inited;
+static bool s_netif_added;
+static bool s_service_added;
 static char s_name[NL_NAME_LEN];
 static char s_mac[18];
 
@@ -45,20 +47,30 @@ static void txt_cb(struct mdns_service *service, void *data)
 static void announce(void *arg)
 {
     struct netif *nif = tls_get_netif();
+    bool attempted = false;
 
     (void)arg;
     if (!nif)
         return;
-    if (!s_started) {
+
+    if (!s_inited) {
         mdns_resp_init();
-        if (mdns_resp_add_netif(nif, nl_wifi_hostname(), NL_MDNS_TTL) == ERR_OK &&
+        s_inited = true;
-            mdns_resp_add_service(nif, nl_wifi_hostname(), "_ninlight", DNSSD_PROTO_TCP, NL_HTTP_PORT, NL_MDNS_TTL,
-                                  txt_cb, NULL) == ERR_OK)
-            s_started = true;
-        printf("mdns: %s.local _ninlight._tcp %s\r\n", nl_wifi_hostname(), s_started ? "up" : "failed");
-    } else {
-        mdns_resp_netif_settings_changed(nif); /* re-announce: new IP or TXT */
     }
+    if (!s_netif_added) {
+        attempted = true;
+        s_netif_added = mdns_resp_add_netif(nif, nl_wifi_hostname(), NL_MDNS_TTL) == ERR_OK;
+    }
+    if (s_netif_added && !s_service_added) {
+        attempted = true;
+        s_service_added = mdns_resp_add_service(nif, nl_wifi_hostname(), "_ninlight", DNSSD_PROTO_TCP, NL_HTTP_PORT,
+                                                 NL_MDNS_TTL, txt_cb, NULL) == ERR_OK;
+    }
+
+    if (attempted)
+        printf("mdns: %s.local _ninlight._tcp %s\r\n", nl_wifi_hostname(), s_service_added ? "up" : "failed");
+    else
+        mdns_resp_netif_settings_changed(nif); /* re-announce: new IP or TXT */
 }
 
 void nl_mdns_on_ip_up(void)
@@ -75,6 +87,6 @@ void nl_mdns_set_name(const char *name)
     strncpy(s_name, name, sizeof s_name - 1);
     s_name[sizeof s_name - 1] = '\0';
     tls_os_release_critical(sr);
-    if (s_started)
+    if (s_service_added)
         tcpip_callback(announce, NULL);
 }