--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/nio/channels/SocketChannel/Hangup.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,192 @@
+/*
+ * Copyright 2002 Sun Microsystems, Inc.  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.
+ *
+ * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/* @test
+ * @bug 4617165
+ * @summary Ensure that socket hangups are handled correctly
+ * @library ..
+ * @build TestUtil
+ * @run main Hangup
+ */
+
+import java.io.*;
+import java.net.*;
+import java.nio.*;
+import java.nio.channels.*;
+import java.util.*;
+
+
+public class Hangup {
+
+    static PrintStream log = System.err;
+    static int failures = 0;
+
+    private static class Failure
+        extends RuntimeException
+    {
+
+        Failure(String s) {
+            super(s);
+        }
+
+    }
+
+    static void doSelect(Selector sel, SelectionKey sk, int count)
+        throws IOException
+    {
+        int n = sel.select();
+        if (n != 1)
+            throw new Failure("Select returned zero");
+        Set sks = sel.selectedKeys();
+        if (sks.size() != 1)
+            throw new Failure("Wrong size for selected-key set: "
+                              + sks.size());
+        if (!sks.remove(sk))
+            throw new Failure("Key not in selected-key set");
+        log.println("S: Socket selected #" + count);
+    }
+
+    static void dally() {
+        try {
+            Thread.sleep(100);
+        } catch (InterruptedException x) { }
+    }
+
+    static void test(boolean writeFromClient, boolean readAfterClose)
+        throws IOException
+    {
+
+        ServerSocketChannel ssc = null;
+        SocketChannel cl = null;        // client end
+        SocketChannel sv = null;        // server end
+        Selector sel = null;
+
+        log.println();
+        log.println("Test: writeFromClient = " + writeFromClient
+                    + ", readAfterClose = " + readAfterClose);
+
+        try {
+
+            int ns = 0;                 // Number of selection operations done
+
+            // Set up server socket
+            ssc = ServerSocketChannel.open();
+            SocketAddress sa = TestUtil.bindToRandomPort(ssc);
+            log.println("S: Listening on port "
+                        + ssc.socket().getLocalPort());
+
+            // Connect client
+            cl = SocketChannel.open(sa);
+            log.println("C: Connected via port "
+                        + cl.socket().getLocalPort());
+
+            // Accept client connection
+            sv = ssc.accept();
+            log.println("S: Client connection accepted");
+
+            // Create selector and register server side
+            sel = Selector.open();
+            sv.configureBlocking(false);
+            SelectionKey sk = sv.register(sel, SelectionKey.OP_READ);
+
+            ByteBuffer stuff = ByteBuffer.allocate(10);
+            int n;
+
+            if (writeFromClient) {
+
+                // Write from client, read from server
+
+                stuff.clear();
+                if (cl.write(stuff) != stuff.capacity())
+                    throw new Failure("Incorrect number of bytes written");
+                log.println("C: Wrote stuff");
+                dally();
+
+                doSelect(sel, sk, ++ns);
+
+                stuff.clear();
+                if (sv.read(stuff) != stuff.capacity())
+                    throw new Failure("Wrong number of bytes read");
+                log.println("S: Read stuff");
+            }
+
+            // Close client side
+            cl.close();
+            log.println("C: Socket closed");
+            dally();
+
+            // Select again
+            doSelect(sel, sk, ++ns);
+
+            if (readAfterClose) {
+                // Read from client after client has disconnected
+                stuff.clear();
+                if (sv.read(stuff) != -1)
+                    throw new Failure("Wrong number of bytes read");
+                log.println("S: Read EOF");
+            }
+
+            // Select a couple more times just to make sure we're doing
+            // the right thing
+
+            doSelect(sel, sk, ++ns);
+            doSelect(sel, sk, ++ns);
+
+        } finally {
+            if (ssc != null)
+                ssc.close();
+            if (cl != null)
+                cl.close();
+            if (sv != null)
+                sv.close();
+            if (sel != null)
+                sel.close();
+        }
+
+    }
+
+    public static void main(String[] args) throws IOException {
+
+        for (boolean writeFromClient = false;; writeFromClient = true) {
+            for (boolean readAfterClose = false;; readAfterClose = true) {
+                try {
+                    test(writeFromClient, readAfterClose);
+                } catch (Failure x) {
+                    x.printStackTrace(log);
+                    failures++;
+                }
+                if (readAfterClose)
+                    break;
+            }
+            if (writeFromClient)
+                break;
+        }
+
+        if (failures > 0) {
+            log.println();
+            throw new RuntimeException("Some tests failed");
+        }
+
+    }
+
+}