104 lines
3.2 KiB
Java
104 lines
3.2 KiB
Java
// PlainDatagramSocketImpl.java - Implementation of DatagramSocketImpl.
|
|
|
|
/* Copyright (C) 1999 Free Software Foundation
|
|
|
|
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;
|
|
|
|
/**
|
|
* @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.
|
|
*/
|
|
|
|
class PlainDatagramSocketImpl extends DatagramSocketImpl
|
|
{
|
|
// These fields are mirrored for use in native code to avoid cpp conflicts
|
|
// when the #defines in system header files are the same as the public fields.
|
|
static final int _Jv_TCP_NODELAY_ = SocketOptions.TCP_NODELAY,
|
|
_Jv_SO_BINDADDR_ = SocketOptions.SO_BINDADDR,
|
|
_Jv_SO_REUSEADDR_ = SocketOptions.SO_REUSEADDR,
|
|
_Jv_IP_MULTICAST_IF_ = SocketOptions.IP_MULTICAST_IF,
|
|
_Jv_SO_LINGER_ = SocketOptions.SO_LINGER,
|
|
_Jv_SO_TIMEOUT_ = SocketOptions.SO_TIMEOUT,
|
|
_Jv_SO_SNDBUF_ = SocketOptions.SO_SNDBUF,
|
|
_Jv_SO_RCVBUF_ = SocketOptions.SO_RCVBUF;
|
|
|
|
int fnum = -1;
|
|
|
|
// FIXME: Is this necessary? Could it help w/ DatagramSocket.getLocalAddress?
|
|
// InetAddress address;
|
|
|
|
// localAddress cache
|
|
InetAddress localAddress;
|
|
|
|
// 'timeout' is set/read by setOption/getOption.
|
|
int timeout = 0;
|
|
|
|
// FIXME: Probably should have bind (and create?) calls from DatagramSocket
|
|
// constuctor. If so, then same change should be made to the corresponding
|
|
// Socket (non-datagram) classes. This allows the implementation more
|
|
// complete control over how the socket is set up and used (e.g. connect,
|
|
// setting options, etc.).
|
|
public PlainDatagramSocketImpl()
|
|
{
|
|
}
|
|
|
|
protected native void bind(int lport, InetAddress laddr)
|
|
throws SocketException;
|
|
protected native void create() throws SocketException;
|
|
protected native int peek(InetAddress i) throws IOException;
|
|
protected native void setTimeToLive(int ttl) throws IOException;
|
|
protected native int getTimeToLive() throws IOException;
|
|
protected native void send(DatagramPacket p) throws IOException;
|
|
protected native void receive(DatagramPacket p) throws IOException;
|
|
public native void setOption(int optID, Object value) throws SocketException;
|
|
public native Object getOption(int optID) throws SocketException;
|
|
private native void mcastGrp(InetAddress inetaddr, boolean join)
|
|
throws IOException;
|
|
protected native void close();
|
|
|
|
// Deprecated in JDK 1.2.
|
|
protected byte getTTL() throws IOException
|
|
{
|
|
return (byte) getTimeToLive();
|
|
}
|
|
|
|
// Deprecated in JDK 1.2.
|
|
protected void setTTL(byte ttl) throws IOException
|
|
{
|
|
setTimeToLive(((int) ttl) & 0xFF);
|
|
}
|
|
|
|
protected void join(InetAddress inetaddr) throws IOException
|
|
{
|
|
mcastGrp(inetaddr, true);
|
|
}
|
|
|
|
protected void leave(InetAddress inetaddr) throws IOException
|
|
{
|
|
mcastGrp(inetaddr, false);
|
|
}
|
|
|
|
protected void finalize() throws Throwable
|
|
{
|
|
synchronized (this)
|
|
{
|
|
if (fnum != -1)
|
|
close();
|
|
}
|
|
super.finalize();
|
|
}
|
|
}
|