[chromecast] Fix constant disconnections (#14105)

When ipv6 is configured on the network, Chromecast devices will randomly
return ipv4 and/or multiple ipv6 addresses during mdns discovery.
This would trigger a thingUpdated call which will call dispose/initialize,
causing the thing to go offline/online.

Signed-off-by: Jimmy Tanagra <jcode@tanagra.id.au>

diff --git a/bundles/org.openhab.binding.chromecast/src/main/java/org/openhab/binding/chromecast/internal/discovery/ChromecastDiscoveryParticipant.java b/bundles/org.openhab.binding.chromecast/src/main/java/org/openhab/binding/chromecast/internal/discovery/ChromecastDiscoveryParticipant.java
index 1aad236ae4823ce8f37dd2556e37eb6a57b8700f..682042cfaa1b03d60230b59b0068f2f33997176f 100644 (file)
--- a/bundles/org.openhab.binding.chromecast/src/main/java/org/openhab/binding/chromecast/internal/discovery/ChromecastDiscoveryParticipant.java
+++ b/bundles/org.openhab.binding.chromecast/src/main/java/org/openhab/binding/chromecast/internal/discovery/ChromecastDiscoveryParticipant.java
@@ -14,6 +14,7 @@ package org.openhab.binding.chromecast.internal.discovery;
 
 import static org.openhab.binding.chromecast.internal.ChromecastBindingConstants.*;
 
+import java.net.Inet4Address;
 import java.util.Dictionary;
 import java.util.Map;
 import java.util.Set;
@@ -89,7 +90,11 @@ public class ChromecastDiscoveryParticipant implements MDNSDiscoveryParticipant
         if (isAutoDiscoveryEnabled) {
             ThingUID uid = getThingUID(service);
             if (uid != null) {
-                String host = service.getHostAddresses()[0];
+                Inet4Address[] addresses = service.getInet4Addresses();
+                if (addresses.length == 0) {
+                    return null;
+                }
+                String host = addresses[0].getHostAddress();
                 int port = service.getPort();
                 logger.debug("Chromecast Found: {} {}", host, port);
                 String id = service.getPropertyString(PROPERTY_DEVICE_ID);