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diff --git a/libjava/java/net/DatagramSocketImpl.java b/libjava/java/net/DatagramSocketImpl.java
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+++ b/libjava/java/net/DatagramSocketImpl.java
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+// DatagramSocketImpl.java - Abstract datagram socket implementation.
+
+/* Copyright (C) 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package java.net;
+import java.io.IOException;
+import java.io.FileDescriptor;
+
+/**
+ * @author Warren Levy <warrenl@cygnus.com>
+ * @date May 3, 1999.
+ */
+
+/**
+ * Written using on-line Java Platform 1.2 API Specification, as well
+ * as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
+ * Status:  Believed complete and correct.
+ */
+
+public abstract class DatagramSocketImpl implements SocketOptions
+{
+  protected int localPort;
+  protected FileDescriptor fd;
+
+  public DatagramSocketImpl()
+  {
+  }
+
+  protected abstract void bind(int lport, InetAddress laddr)
+  	throws SocketException;
+  protected abstract void close();
+  protected abstract void create() throws SocketException;
+  protected abstract int peek(InetAddress i) throws IOException;
+  protected abstract void send(DatagramPacket p) throws IOException;
+  protected abstract void receive(DatagramPacket p) throws IOException;
+  protected abstract void setTTL(byte ttl) throws IOException;
+  protected abstract byte getTTL() throws IOException;
+  protected abstract void setTimeToLive(int ttl) throws IOException;
+  protected abstract int getTimeToLive() throws IOException;
+  protected abstract void join(InetAddress inetaddr) throws IOException;
+  protected abstract void leave(InetAddress inetaddr) throws IOException;
+
+  public abstract Object getOption(int optID) throws SocketException;
+  public abstract void setOption(int optID, Object value)
+    throws SocketException;
+
+  protected FileDescriptor getFileDescriptor()
+  {
+    return fd;
+  }
+
+  protected int getLocalPort()
+  {
+    return localPort;
+  }
+}