+++ /dev/null
-/* MulticastSocket.java -- Class for using multicast sockets
- Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath 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 for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-02111-1307 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module. An independent module is a module which is not derived from
-or based on this library. If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so. If you do not wish to do so, delete this
-exception statement from your version. */
-
-package java.net;
-
-import java.io.IOException;
-
-/*
- * 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.
- */
-
-/**
- * This class models a multicast UDP socket. A multicast address is a
- * class D internet address (one whose most significant bits are 1110).
- * A multicast group consists of a multicast address and a well known
- * port number. All members of the group listening on that address and
- * port will receive all the broadcasts to the group.
- * <p>
- * Please note that applets are not allowed to use multicast sockets
- *
- * 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.
- *
- * @author Warren Levy <warrenl@cygnus.com>
- * @author Aaron M. Renn (arenn@urbanophile.com) (Documentation comments)
- * @date May 18, 1999.
- */
-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.
-
-/**
- * Create a MulticastSocket that this not bound to any address
- *
- * @exception IOException If an error occurs
- */
- public MulticastSocket() throws IOException
- {
- super(0, null);
- }
-
-/**
- * Create a multicast socket bound to the specified port
- *
- * @param The port to bind to
- *
- * @exception IOException If an error occurs
- */
- public MulticastSocket(int port) throws IOException
- {
- super(port, null);
- }
-
-/**
- * Returns the interface being used for multicast packets
- *
- * @return The multicast interface
- *
- * @exception SocketException If an error occurs
- */
- 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);
- }
-
-/**
- * Returns the current value of the "Time to Live" option. This is the
- * number of hops a packet can make before it "expires". This method id
- * deprecated. Use <code>getTimeToLive</code> instead.
- *
- * @return The TTL value
- *
- * @exception IOException If an error occurs
- *
- * @deprecated Replaced by getTimeToLive() in Java 1.2
- */
- 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();
- }
-
-/**
- * Returns the current value of the "Time to Live" option. This is the
- * number of hops a packet can make before it "expires".
- *
- * @return The TTL value
- *
- * @exception IOException If an error occurs
- *
- * @since Java 1.2
- */
- public int getTimeToLive() throws IOException
- {
- return impl.getTimeToLive();
- }
-
-/**
- * Sets the interface to use for multicast packets.
- *
- * @param addr The new interface to use
- *
- * @exception SocketException If an error occurs
- */
- public void setInterface(InetAddress inf) throws SocketException
- {
- impl.setOption(SocketOptions.IP_MULTICAST_IF, inf);
- }
-
-/**
- * Sets the "Time to Live" value for a socket. The value must be between
- * 1 and 255.
- *
- * @param ttl The new TTL value
- *
- * @exception IOException If an error occurs
- *
- * @deprecated Replaced by <code>setTimeToLive</code> in Java 1.2
- */
- 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);
- }
-
-/**
- * Sets the "Time to Live" value for a socket. The value must be between
- * 1 and 255.
- *
- * @param ttl The new TTL value
- *
- * @exception IOException If an error occurs
- *
- * @since Java 1.2
- */
- public void setTimeToLive(int ttl) throws IOException
- {
- if (ttl <= 0 || ttl > 255)
- throw new IllegalArgumentException("Invalid ttl: " + ttl);
-
- impl.setTimeToLive(ttl);
- }
-
-/**
- * Joins the specified mulitcast group.
- *
- * @param addr The address of the group to join
- *
- * @exception IOException If an error occurs
- */
- 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);
- }
-
-/**
- * Leaves the specified multicast group
- *
- * @param addr The address of the group to leave
- *
- * @exception IOException If an error occurs
- */
- 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);
- }
-
-/**
- * Sends a packet of data to a multicast address with a TTL that is
- * different from the default TTL on this socket. The default TTL for
- * the socket is not changed.
- *
- * @param packet The packet of data to send
- * @param ttl The TTL for this packet
- *
- * @exception IOException If an error occurs
- */
- 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);
- }
-} // class MulticastSocket
projects / msp430-gcc.git / blobdiff