1999-05-18 20:02:01 +02:00
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// PlainDatagramSocketImpl.java - Implementation of DatagramSocketImpl.
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2000-03-07 20:55:28 +01:00
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/* Copyright (C) 1999 Free Software Foundation
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1999-05-18 20:02:01 +02:00
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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package java.net;
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import java.io.IOException;
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/**
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* @author Warren Levy <warrenl@cygnus.com>
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* @date May 3, 1999.
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*/
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/**
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* Written using on-line Java Platform 1.2 API Specification, as well
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* as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
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* Status: Believed complete and correct.
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*/
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class PlainDatagramSocketImpl extends DatagramSocketImpl
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{
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1999-05-26 19:00:06 +02:00
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// These fields are mirrored for use in native code to avoid cpp conflicts
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// when the #defines in system header files are the same as the public fields.
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static final int _Jv_TCP_NODELAY_ = SocketOptions.TCP_NODELAY,
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_Jv_SO_BINDADDR_ = SocketOptions.SO_BINDADDR,
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_Jv_SO_REUSEADDR_ = SocketOptions.SO_REUSEADDR,
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_Jv_IP_MULTICAST_IF_ = SocketOptions.IP_MULTICAST_IF,
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_Jv_SO_LINGER_ = SocketOptions.SO_LINGER,
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_Jv_SO_TIMEOUT_ = SocketOptions.SO_TIMEOUT,
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_Jv_SO_SNDBUF_ = SocketOptions.SO_SNDBUF,
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_Jv_SO_RCVBUF_ = SocketOptions.SO_RCVBUF;
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1999-05-18 20:02:01 +02:00
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int fnum = -1;
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1999-05-28 21:29:53 +02:00
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// FIXME: Is this necessary? Could it help w/ DatagramSocket.getLocalAddress?
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1999-06-17 02:21:26 +02:00
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// InetAddress address;
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// localAddress cache
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InetAddress localAddress;
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1999-05-28 21:29:53 +02:00
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1999-07-02 06:25:05 +02:00
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// 'timeout' is set/read by setOption/getOption.
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1999-05-26 19:00:06 +02:00
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int timeout = 0;
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1999-05-18 20:02:01 +02:00
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// FIXME: Probably should have bind (and create?) calls from DatagramSocket
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// constuctor. If so, then same change should be made to the corresponding
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// Socket (non-datagram) classes. This allows the implementation more
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1999-05-26 19:00:06 +02:00
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// complete control over how the socket is set up and used (e.g. connect,
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1999-05-18 20:02:01 +02:00
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// setting options, etc.).
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public PlainDatagramSocketImpl()
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{
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}
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protected native void bind(int lport, InetAddress laddr)
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throws SocketException;
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protected native void create() throws SocketException;
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protected native int peek(InetAddress i) throws IOException;
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protected native void setTimeToLive(int ttl) throws IOException;
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protected native int getTimeToLive() throws IOException;
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protected native void send(DatagramPacket p) throws IOException;
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protected native void receive(DatagramPacket p) throws IOException;
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1999-05-26 19:00:06 +02:00
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public native void setOption(int optID, Object value) throws SocketException;
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public native Object getOption(int optID) throws SocketException;
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private native void mcastGrp(InetAddress inetaddr, boolean join)
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throws IOException;
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1999-05-18 20:02:01 +02:00
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1999-07-20 22:30:42 +02:00
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protected void close()
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1999-05-18 20:02:01 +02:00
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{
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1999-07-20 22:30:42 +02:00
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// FIXME: The close method in each of the DatagramSocket* classes does
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// not throw an IOException. The issue is that FileDescriptor.close()
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// in natFileDescriptorPosix.cc can throw one, so we have to catch
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// it here. It seems that FileDescriptor.close is properly throwing
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// the IOException on errors since many of the java.io classes depend
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// on that. This probably requires a bit more research but for now,
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// we'll catch the IOException here.
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try
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{
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fd.close();
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}
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catch (IOException e)
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{
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System.err.println("PlainDatagramSocketImpl.close: Error closing - " +
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e.getMessage());
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}
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1999-05-18 20:02:01 +02:00
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}
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1999-05-26 19:00:06 +02:00
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// Deprecated in JDK 1.2.
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protected byte getTTL() throws IOException
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{
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return (byte) getTimeToLive();
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}
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// Deprecated in JDK 1.2.
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protected void setTTL(byte ttl) throws IOException
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{
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setTimeToLive(((int) ttl) & 0xFF);
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}
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protected void join(InetAddress inetaddr) throws IOException
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{
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mcastGrp(inetaddr, true);
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}
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protected void leave(InetAddress inetaddr) throws IOException
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{
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mcastGrp(inetaddr, false);
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}
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1999-05-18 20:02:01 +02:00
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}
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