8280113: (dc) DatagramSocket.receive does not always throw when the c…

…hannel is closed

Reviewed-by: mbaesken
Backport-of: b6ecca126846f9c53d554ff061cfe9b7b20a4d12

src/java.base/share/classes/sun/nio/ch/DatagramChannelImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -547,7 +547,7 @@ public SocketAddress receive(ByteBuffer dst) throws IOException {
                             n = receive(dst, connected);
                         }
                     }
-                    if (n >= 0) {
+                    if (n > 0 || (n == 0 && isOpen())) {
                         // sender address is in socket address buffer
                         sender = sourceSocketAddress();
                     }
@@ -668,7 +668,7 @@ private SocketAddress trustedBlockingReceive(ByteBuffer dst)
                 park(Net.POLLIN);
                 n = receive(dst, connected);
             }
-            if (n >= 0) {
+            if (n > 0 || (n == 0 && isOpen())) {
                 // sender address is in socket address buffer
                 sender = sourceSocketAddress();
             }
@@ -705,7 +705,7 @@ private SocketAddress trustedBlockingReceive(ByteBuffer dst, long nanos)
                     park(Net.POLLIN, remainingNanos);
                     n = receive(dst, connected);
                 }
-                if (n >= 0) {
+                if (n > 0 || (n == 0 && isOpen())) {
                     // sender address is in socket address buffer
                     sender = sourceSocketAddress();
                 }