Reject interfaces that have no addresses

Cherry-pick of 0ccc673 from release-1.15 branch.
RPTools · Sep 18, 2024 · baa89cd · baa89cd
1 parent eb6de1a
commit baa89cd
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/main/java/net/rptools/maptool/util/UPnPUtil.java b/src/main/java/net/rptools/maptool/util/UPnPUtil.java
@@ -50,7 +50,9 @@ public static boolean findIGDs() {
         NetworkInterface ni = e.nextElement();
         try {
           var addresses = Collections.list(ni.getInetAddresses());
-          if (ni.isLoopback()) {
+          if (addresses.isEmpty()) {
+            log.info("UPnP:  Rejecting interface '{}' as it has no addresses", ni.getDisplayName());
+          } else if (ni.isLoopback()) {
             log.info(
                 "UPnP:  Rejecting interface '{}' [{}] as it is a loopback",
                 ni.getDisplayName(),