diff -r 4ebc2e2fb97c -r 71c04702a3d5 src/java.base/unix/native/libnio/ch/DatagramDispatcher.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/unix/native/libnio/ch/DatagramDispatcher.c	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2002, 2012, 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 "jni.h"
+#include "jni_util.h"
+#include "jvm.h"
+#include "jlong.h"
+#include "sun_nio_ch_DatagramDispatcher.h"
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <sys/socket.h>
+#include <string.h>
+
+#include "nio_util.h"
+#include <limits.h>
+
+JNIEXPORT jint JNICALL
+Java_sun_nio_ch_DatagramDispatcher_read0(JNIEnv *env, jclass clazz,
+                         jobject fdo, jlong address, jint len)
+{
+    jint fd = fdval(env, fdo);
+    void *buf = (void *)jlong_to_ptr(address);
+    int result = recv(fd, buf, len, 0);
+    if (result < 0 && errno == ECONNREFUSED) {
+        JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0);
+        return -2;
+    }
+    return convertReturnVal(env, result, JNI_TRUE);
+}
+
+
+JNIEXPORT jlong JNICALL
+Java_sun_nio_ch_DatagramDispatcher_readv0(JNIEnv *env, jclass clazz,
+                              jobject fdo, jlong address, jint len)
+{
+    jint fd = fdval(env, fdo);
+    ssize_t result = 0;
+    struct iovec *iov = (struct iovec *)jlong_to_ptr(address);
+    struct msghdr m;
+    if (len > IOV_MAX) {
+        len = IOV_MAX;
+    }
+
+    // initialize the message
+    memset(&m, 0, sizeof(m));
+    m.msg_iov = iov;
+    m.msg_iovlen = len;
+
+    result = recvmsg(fd, &m, 0);
+    if (result < 0 && errno == ECONNREFUSED) {
+        JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0);
+        return -2;
+    }
+    return convertLongReturnVal(env, (jlong)result, JNI_TRUE);
+}
+
+JNIEXPORT jint JNICALL
+Java_sun_nio_ch_DatagramDispatcher_write0(JNIEnv *env, jclass clazz,
+                              jobject fdo, jlong address, jint len)
+{
+    jint fd = fdval(env, fdo);
+    void *buf = (void *)jlong_to_ptr(address);
+    int result = send(fd, buf, len, 0);
+    if (result < 0 && errno == ECONNREFUSED) {
+        JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0);
+        return -2;
+    }
+    return convertReturnVal(env, result, JNI_FALSE);
+}
+
+JNIEXPORT jlong JNICALL
+Java_sun_nio_ch_DatagramDispatcher_writev0(JNIEnv *env, jclass clazz,
+                                       jobject fdo, jlong address, jint len)
+{
+    jint fd = fdval(env, fdo);
+    struct iovec *iov = (struct iovec *)jlong_to_ptr(address);
+    struct msghdr m;
+    ssize_t result = 0;
+    if (len > IOV_MAX) {
+        len = IOV_MAX;
+    }
+
+    // initialize the message
+    memset(&m, 0, sizeof(m));
+    m.msg_iov = iov;
+    m.msg_iovlen = len;
+
+    result = sendmsg(fd, &m, 0);
+    if (result < 0 && errno == ECONNREFUSED) {
+        JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0);
+        return -2;
+    }
+    return convertLongReturnVal(env, (jlong)result, JNI_FALSE);
+}