mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-26 21:30:09 +08:00
f70b7142c2
* java/util/Locale.java (Locale): Don't explicitly check for null. * java/util/Hashtable.java (containsKey): Don't explicitly check for null. (get): Likewise. * java/util/BitSet.java (and, or, xor): Don't explicitly check for null. * java/util/zip/ZipEntry.java (ZipEntry): Don't explicitly check for null. * java/text/StringCharacterIterator.java (StringCharacterIterator): Don't check for null. * java/text/ChoiceFormat.java (setChoices): Don't explicitly check for null pointer. * java/net/MulticastSocket.java (joinGroup): Don't explicitly check for null pointer. (leaveGroup): Likewise. * java/net/DatagramPacket.java (DatagramPacket): Removed erroneous comment. (setData): Likewise. * java/lang/ThreadGroup.java (ThreadGroup): Don't explicitly check for `p==null'. From-SVN: r33671
127 lines
3.2 KiB
Java
127 lines
3.2 KiB
Java
// MulticastSocket.java
|
|
|
|
/* Copyright (C) 1999, 2000 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 18, 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 class MulticastSocket extends DatagramSocket
|
|
{
|
|
// FIXME: the local addr bound to the multicast socket can be reused;
|
|
// unlike unicast sockets. It binds to any available network interface.
|
|
// See p.1159 JCL book.
|
|
|
|
public MulticastSocket() throws IOException
|
|
{
|
|
super(0, ServerSocket.ANY_IF);
|
|
}
|
|
|
|
public MulticastSocket(int port) throws IOException
|
|
{
|
|
super(port, ServerSocket.ANY_IF);
|
|
}
|
|
|
|
public InetAddress getInterface() throws SocketException
|
|
{
|
|
// FIXME: Is it possible that an InetAddress wasn't returned from getOption?
|
|
return (InetAddress) impl.getOption(SocketOptions.IP_MULTICAST_IF);
|
|
}
|
|
|
|
// Deprecated in JDK1.2
|
|
public byte getTTL() throws IOException
|
|
{
|
|
// Use getTTL here rather than getTimeToLive in case we're using an impl
|
|
// other than the default PlainDatagramSocketImpl and it doesn't have
|
|
// getTimeToLive yet.
|
|
return impl.getTTL();
|
|
}
|
|
|
|
// JDK1.2
|
|
public int getTimeToLive() throws IOException
|
|
{
|
|
return impl.getTimeToLive();
|
|
}
|
|
|
|
public void setInterface(InetAddress inf) throws SocketException
|
|
{
|
|
impl.setOption(SocketOptions.IP_MULTICAST_IF, inf);
|
|
}
|
|
|
|
// Deprecated in JDK1.2
|
|
public void setTTL(byte ttl) throws IOException
|
|
{
|
|
// Use setTTL here rather than setTimeToLive in case we're using an impl
|
|
// other than the default PlainDatagramSocketImpl and it doesn't have
|
|
// setTimeToLive yet.
|
|
impl.setTTL(ttl);
|
|
}
|
|
|
|
// JDK1.2
|
|
public void setTimeToLive(int ttl) throws IOException
|
|
{
|
|
if (ttl <= 0 || ttl > 255)
|
|
throw new IllegalArgumentException("Invalid ttl: " + ttl);
|
|
|
|
impl.setTimeToLive(ttl);
|
|
}
|
|
|
|
public void joinGroup(InetAddress mcastaddr) throws IOException
|
|
{
|
|
if (! mcastaddr.isMulticastAddress())
|
|
throw new IOException("Not a Multicast address");
|
|
|
|
SecurityManager s = System.getSecurityManager();
|
|
if (s != null)
|
|
s.checkMulticast(mcastaddr);
|
|
|
|
impl.join(mcastaddr);
|
|
}
|
|
|
|
public void leaveGroup(InetAddress mcastaddr) throws IOException
|
|
{
|
|
if (! mcastaddr.isMulticastAddress())
|
|
throw new IOException("Not a Multicast address");
|
|
|
|
SecurityManager s = System.getSecurityManager();
|
|
if (s != null)
|
|
s.checkMulticast(mcastaddr);
|
|
|
|
impl.leave(mcastaddr);
|
|
}
|
|
|
|
public synchronized void send(DatagramPacket p, byte ttl) throws IOException
|
|
{
|
|
SecurityManager s = System.getSecurityManager();
|
|
if (s != null)
|
|
{
|
|
InetAddress addr = p.getAddress();
|
|
if (addr.isMulticastAddress())
|
|
s.checkMulticast(addr, ttl);
|
|
else
|
|
s.checkConnect(addr.getHostAddress(), p.getPort());
|
|
}
|
|
|
|
int oldttl = impl.getTimeToLive();
|
|
impl.setTimeToLive(((int) ttl) & 0xFF);
|
|
impl.send(p);
|
|
impl.setTimeToLive(oldttl);
|
|
}
|
|
}
|