--- /dev/null	2020-01-06 11:04:48.000000000 +0000
+++ new/src/java.base/share/native/libnio/ch/nio_multicast.h	2020-01-06 11:04:47.000000000 +0000
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2020, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#ifdef WIN32
+#include <windows.h>
+#include <WS2tcpip.h>
+#else
+#include <sys/socket.h>
+#include <netinet/in.h>
+#endif
+
+#include "jni.h"
+
+extern void initGroupReq4(JNIEnv* env, struct group_req *req, jint index, jint group);
+
+extern void initGroupSourceReq4(JNIEnv* env, struct group_source_req *req,
+                                jint index, jint group, jint source);
+
+extern void initGroupReq6(JNIEnv* env, struct group_req *req,
+                          jint index, jbyteArray group);
+
+extern void initGroupSourceReq6(JNIEnv* env, struct group_source_req *req,
+                                int index, jbyteArray group, jbyteArray source);