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513 lines
15 KiB
Java
513 lines
15 KiB
Java
/* VMPlainSocketImpl.java -- VM interface for default socket implementation
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Copyright (C) 2005, 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.net;
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import java.io.IOException;
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import java.net.Inet4Address;
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import java.net.Inet6Address;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.net.NetworkInterface;
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import java.net.SocketException;
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import java.net.SocketOptions;
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import gnu.classpath.Configuration;
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import gnu.java.nio.VMChannel;
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/**
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* The VM interface for {@link gnu.java.net.PlainSocketImpl}.
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*
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* @author Ingo Proetel (proetel@aicas.com)
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* @author Roman Kennke (kennke@aicas.com)
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*/
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public final class VMPlainSocketImpl
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{
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/** Option id for time to live
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*/
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private static final int CP_IP_TTL = 0x1E61;
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private final State nfd;
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/**
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* Static initializer to load native library.
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*/
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static
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{
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if (Configuration.INIT_LOAD_LIBRARY)
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{
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System.loadLibrary("javanet");
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}
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}
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public VMPlainSocketImpl()
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{
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// XXX consider adding security check here.
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nfd = new State();
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}
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public VMPlainSocketImpl(VMChannel channel) throws IOException
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{
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this();
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nfd.setChannelFD(channel.getState());
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}
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public State getState()
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{
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return nfd;
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}
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/** This method exists to hide the CP_IP_TTL value from
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* higher levels.
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*
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* Always think of JNode ... :)
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*/
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public void setTimeToLive(int ttl)
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throws SocketException
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{
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try
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{
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setOption(nfd.getNativeFD(), CP_IP_TTL, ttl);
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}
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catch (IOException ioe)
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{
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SocketException se = new SocketException();
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se.initCause(ioe);
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throw se;
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}
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}
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public int getTimeToLive()
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throws SocketException
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{
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try
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{
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return getOption(nfd.getNativeFD(), CP_IP_TTL);
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}
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catch (IOException ioe)
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{
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SocketException se = new SocketException();
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se.initCause(ioe);
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throw se;
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}
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}
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public void setOption(int optionId, Object optionValue)
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throws SocketException
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{
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int value;
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if (optionValue instanceof Integer)
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value = ((Integer) optionValue).intValue();
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else if (optionValue instanceof Boolean)
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// Switching off the linger behavior is done by setting
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// the value to -1. This is how the Java API interprets
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// it.
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value = ((Boolean) optionValue).booleanValue()
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? 1
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: (optionId == SocketOptions.SO_LINGER)
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? -1
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: 0;
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else
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throw new IllegalArgumentException("option value type "
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+ optionValue.getClass().getName());
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try
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{
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setOption(nfd.getNativeFD(), optionId, value);
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}
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catch (IOException ioe)
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{
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SocketException se = new SocketException();
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se.initCause(ioe);
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throw se;
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}
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}
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private static native void setOption(int fd, int id, int value)
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throws SocketException;
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public void setMulticastInterface(int optionId, InetAddress addr)
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throws SocketException
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{
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try
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{
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if (addr instanceof Inet4Address)
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setMulticastInterface(nfd.getNativeFD(), optionId, (Inet4Address) addr);
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else if (addr instanceof Inet6Address)
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{
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NetworkInterface iface = NetworkInterface.getByInetAddress(addr);
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setMulticastInterface6(nfd.getNativeFD(), optionId, iface.getName());
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}
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else
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throw new SocketException("Unknown address format: " + addr);
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}
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catch (SocketException se)
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{
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throw se;
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}
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catch (IOException ioe)
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{
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SocketException se = new SocketException();
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se.initCause(ioe);
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throw se;
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}
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}
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private static native void setMulticastInterface(int fd,
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int optionId,
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Inet4Address addr);
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private static native void setMulticastInterface6(int fd,
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int optionId,
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String ifName);
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/**
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* Get a socket option. This implementation is only required to support
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* socket options that are boolean values, which include:
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*
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* SocketOptions.IP_MULTICAST_LOOP
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* SocketOptions.SO_BROADCAST
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* SocketOptions.SO_KEEPALIVE
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* SocketOptions.SO_OOBINLINE
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* SocketOptions.SO_REUSEADDR
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* SocketOptions.TCP_NODELAY
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*
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* and socket options that are integer values, which include:
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*
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* SocketOptions.IP_TOS
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* SocketOptions.SO_LINGER
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* SocketOptions.SO_RCVBUF
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* SocketOptions.SO_SNDBUF
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* SocketOptions.SO_TIMEOUT
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*
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* @param optionId The option ID to fetch.
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* @return A {@link Boolean} or {@link Integer} containing the socket
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* option.
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* @throws SocketException
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*/
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public Object getOption(int optionId) throws SocketException
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{
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int value;
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try
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{
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value = getOption(nfd.getNativeFD(), optionId);
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}
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catch (IOException ioe)
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{
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SocketException se = new SocketException();
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se.initCause(ioe);
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throw se;
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}
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switch (optionId)
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{
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case SocketOptions.IP_MULTICAST_LOOP:
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case SocketOptions.SO_BROADCAST:
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case SocketOptions.SO_KEEPALIVE:
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case SocketOptions.SO_OOBINLINE:
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case SocketOptions.SO_REUSEADDR:
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case SocketOptions.TCP_NODELAY:
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return Boolean.valueOf(value != 0);
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case SocketOptions.IP_TOS:
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case SocketOptions.SO_LINGER:
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case SocketOptions.SO_RCVBUF:
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case SocketOptions.SO_SNDBUF:
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case SocketOptions.SO_TIMEOUT:
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return new Integer(value);
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default:
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throw new SocketException("getting option " + optionId +
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" not supported here");
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}
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}
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private static native int getOption(int fd, int id) throws SocketException;
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/**
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* Returns an Inet4Address or Inet6Address instance belonging to the
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* interface which is set as the multicast interface.
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*
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* The optionId is provided to make it possible that the native
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* implementation may do something different depending on whether
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* the value is SocketOptions.IP_MULTICAST_IF or
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* SocketOptions.IP_MULTICAST_IF2.
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*/
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public InetAddress getMulticastInterface(int optionId)
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throws SocketException
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{
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try
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{
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return getMulticastInterface(nfd.getNativeFD(), optionId);
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}
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catch (IOException ioe)
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{
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SocketException se = new SocketException();
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se.initCause(ioe);
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throw se;
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}
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}
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private static native InetAddress getMulticastInterface(int fd,
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int optionId);
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/**
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* Binds this socket to the given local address and port.
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*
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* @param address The address to bind to; the InetAddress is either
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* an IPv4 or IPv6 address.
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* @throws IOException If binding fails; for example, if the port
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* in the given InetSocketAddress is privileged, and the current
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* process has insufficient privileges.
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*/
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public void bind(InetSocketAddress address) throws IOException
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{
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InetAddress addr = address.getAddress();
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if (addr instanceof Inet4Address)
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{
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bind (nfd.getNativeFD(), addr.getAddress(), address.getPort());
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}
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else if (addr instanceof Inet6Address)
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bind6 (nfd.getNativeFD(), addr.getAddress(), address.getPort());
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else
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throw new SocketException ("unsupported address type");
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}
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/**
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* Native bind function for IPv4 addresses. The addr array must be
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* exactly four bytes long.
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*
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* VMs without native support need not implement this.
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*
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* @param fd The native file descriptor integer.
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* @param addr The IPv4 address, in network byte order.
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* @param port The port to bind to.
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* @throws IOException
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*/
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private static native void bind(int fd, byte[] addr, int port)
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throws IOException;
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/**
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* Native bind function for IPv6 addresses. The addr array must be
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* exactly sixteen bytes long.
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*
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* VMs without native support need not implement this.
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*
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* @param fd The native file descriptor integer.
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* @param addr The IPv6 address, in network byte order.
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* @param port The port to bind to.
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* @throws IOException
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*/
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private static native void bind6(int fd, byte[] addr, int port)
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throws IOException;
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/**
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* Listen on this socket for incoming connections.
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*
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* @param backlog The backlog of connections.
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* @throws IOException If listening fails.
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* @see gnu.java.nio.VMChannel#accept()
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*/
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public void listen(int backlog) throws IOException
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{
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listen(nfd.getNativeFD(), backlog);
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}
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/**
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* Native listen function. VMs without native support need not implement
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* this.
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*
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* @param fd The file descriptor integer.
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* @param backlog The listen backlog size.
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* @throws IOException
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*/
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private static native void listen(int fd, int backlog) throws IOException;
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public void join(InetAddress group) throws IOException
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{
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if (group instanceof Inet4Address)
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join(nfd.getNativeFD(), group.getAddress());
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else if (group instanceof Inet6Address)
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join6(nfd.getNativeFD(), group.getAddress());
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else
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throw new IllegalArgumentException("unknown address type");
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}
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private static native void join(int fd, byte[] addr) throws IOException;
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private static native void join6(int fd, byte[] addr) throws IOException;
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public void leave(InetAddress group) throws IOException
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{
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if (group instanceof Inet4Address)
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leave(nfd.getNativeFD(), group.getAddress());
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else if (group instanceof Inet6Address)
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leave6(nfd.getNativeFD(), group.getAddress());
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else
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throw new IllegalArgumentException("unknown address type");
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}
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private static native void leave(int fd, byte[] addr) throws IOException;
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private static native void leave6(int fd, byte[] addr) throws IOException;
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public void joinGroup(InetSocketAddress addr, NetworkInterface netif)
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throws IOException
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{
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InetAddress address = addr.getAddress();
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if (address instanceof Inet4Address)
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joinGroup(nfd.getNativeFD(), address.getAddress(),
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netif != null ? netif.getName() : null);
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else if (address instanceof Inet6Address)
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joinGroup6(nfd.getNativeFD(), address.getAddress(),
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netif != null ? netif.getName() : null);
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else
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throw new IllegalArgumentException("unknown address type");
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}
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private static native void joinGroup(int fd, byte[] addr, String ifname)
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throws IOException;
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private static native void joinGroup6(int fd, byte[] addr, String ifname)
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throws IOException;
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public void leaveGroup(InetSocketAddress addr, NetworkInterface netif)
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throws IOException
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{
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InetAddress address = addr.getAddress();
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if (address instanceof Inet4Address)
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leaveGroup(nfd.getNativeFD(), address.getAddress(),
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netif != null ? netif.getName() : null);
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else if (address instanceof Inet6Address)
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leaveGroup6(nfd.getNativeFD(), address.getAddress(),
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netif != null ? netif.getName() : null);
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else
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throw new IllegalArgumentException("unknown address type");
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}
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private static native void leaveGroup(int fd, byte[] addr, String ifname)
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throws IOException;
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private static native void leaveGroup6(int fd, byte[] addr, String ifname)
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throws IOException;
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public void shutdownInput() throws IOException
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{
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shutdownInput(nfd.getNativeFD());
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}
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private static native void shutdownInput(int native_fd) throws IOException;
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public void shutdownOutput() throws IOException
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{
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shutdownOutput(nfd.getNativeFD());
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}
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private static native void shutdownOutput(int native_fd) throws IOException;
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public void sendUrgentData(int data) throws IOException
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{
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sendUrgentData(nfd.getNativeFD(), data);
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}
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private static native void sendUrgentData(int natfive_fd, int data) throws IOException;
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public void close() throws IOException
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{
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nfd.close();
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}
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// Inner classes.
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/**
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* Our wrapper for the native file descriptor. In this implementation,
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* it is a simple wrapper around {@link VMChannel.State}, to simplify
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* management of the native state.
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*/
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public final class State
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{
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private VMChannel.State channelFd;
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State()
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{
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channelFd = null;
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}
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public boolean isValid()
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{
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if (channelFd != null)
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return channelFd.isValid();
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return false;
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}
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public int getNativeFD() throws IOException
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{
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return channelFd.getNativeFD();
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}
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public void setChannelFD(final VMChannel.State nfd) throws IOException
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{
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if (this.channelFd != null && this.channelFd.isValid())
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throw new IOException("file descriptor already initialized");
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this.channelFd = nfd;
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}
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public void close() throws IOException
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{
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if (channelFd == null)
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throw new IOException("invalid file descriptor");
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channelFd.close();
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}
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protected void finalize() throws Throwable
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{
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try
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{
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if (isValid())
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close();
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}
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finally
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{
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super.finalize();
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}
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}
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}
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}
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