8330278: Have SSLSocketTemplate.doClientSide use loopback address

Backport-of: 0eff492e4107abc5624f0c3445877bf38629a980

test/jdk/javax/net/ssl/templates/SSLSocketTemplate.java

 /*
- * Copyright (c) 2016, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2024, 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
@@ -273,7 +273,7 @@ public class SSLSocketTemplate extends SSLContextTemplate {
                 configureClientSocket(sslSocket);
                 InetAddress serverAddress = this.serverAddress;
                 InetSocketAddress connectAddress = serverAddress == null
-                        ? new InetSocketAddress("localhost", serverPort)
+                        ? new InetSocketAddress(InetAddress.getLoopbackAddress(), serverPort)
                         : new InetSocketAddress(serverAddress, serverPort);
                 sslSocket.connect(connectAddress, 15000);
             } catch (IOException ioe) {

test/jdk/javax/net/ssl/templates/TLSBase.java

@@ -31,6 +31,7 @@ import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.OutputStreamWriter;
 import java.io.PrintWriter;
+import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.util.Arrays;
 import java.util.concurrent.ConcurrentHashMap;
@@ -222,7 +223,7 @@ abstract public class TLSBase {
             try {
                 sslContext = SSLContext.getDefault();
                 sock = (SSLSocket)sslContext.getSocketFactory().createSocket();
-                sock.connect(new InetSocketAddress("localhost", serverPort));
+                sock.connect(new InetSocketAddress(InetAddress.getLoopbackAddress(), serverPort));
                 System.err.println("Client connected using port " +
                         sock.getLocalPort());
                 name = "client(" + sock.toString() + ")";