--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.net/linux/native/libextnet/rdma_util_md.h	Sat Jan 26 14:02:35 2019 +0000
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2018, 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.
+ */
+
+#include <poll.h>
+#include <sys/socket.h>
+#include <errno.h>
+#include <net_util_md.h>
+
+/************************************************************************
+ * Functions
+ */
+int rdma_supported();
+int RDMA_MapSocketOption(jint cmd, int *level, int *optname);
+int RDMA_Bind(int fd, SOCKETADDRESS *sa, int len);
+int RDMA_Timeout(JNIEnv *env, int s, long timeout, jlong  nanoTimeStamp);
+int RDMA_Read(int s, void* buf, size_t len);
+int RDMA_NonBlockingRead(int s, void* buf, size_t len);
+int RDMA_RecvFrom(int s, void *buf, int len, unsigned int flags,
+                 struct sockaddr *from, socklen_t *fromlen);
+int RDMA_ReadV(int s, const struct iovec * vector, int count);
+int RDMA_Send(int s, void *msg, int len, unsigned int flags);
+int RDMA_SendTo(int s, const void *msg, int len,  unsigned  int
+               flags, const struct sockaddr *to, int tolen);
+int RDMA_Writev(int s, const struct iovec * vector, int count);
+int RDMA_Connect(int s, struct sockaddr *addr, int addrlen);
+int RDMA_Accept(int s, struct sockaddr *addr, socklen_t *addrlen);
+int RDMA_SocketClose(int s);
+int RDMA_Poll(struct pollfd *ufds, unsigned int nfds, int timeout);
+int RDMA_SetSockOpt(int fd, int level, int  opt, const void *arg, int len);
+int RDMA_GetSockOpt(int fd, int level, int opt, void *result, int *len);