+++ /dev/null
-// DatagramSocket.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 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.
- */
-
-public class DatagramSocket
-{
- DatagramSocketImpl impl;
-
- public DatagramSocket() throws SocketException
- {
- this(0, null);
- }
-
- public DatagramSocket(int port) throws SocketException
- {
- this(port, null);
- }
-
- public DatagramSocket(int port, InetAddress laddr) throws SocketException
- {
- if (port < 0 || port > 65535)
- throw new IllegalArgumentException("Invalid port: " + port);
-
- SecurityManager s = System.getSecurityManager();
- if (s != null)
- s.checkListen(port);
-
- String propVal = System.getProperty("impl.prefix");
- if (propVal == null || propVal.equals(""))
- impl = new PlainDatagramSocketImpl();
- else
- try
- {
- impl = (DatagramSocketImpl) Class.forName("java.net." + propVal +
- "DatagramSocketImpl").newInstance();
- }
- catch (Exception e)
- {
- System.err.println("Could not instantiate class: java.net." +
- propVal + "DatagramSocketImpl");
- impl = new PlainDatagramSocketImpl();
- }
- impl.create();
-
- // For multicasting, set the socket to be reused (Stevens pp. 195-6).
- if (this instanceof MulticastSocket)
- impl.setOption(SocketOptions.SO_REUSEADDR, new Boolean(true));
-
- impl.bind(port, laddr == null ? InetAddress.ANY_IF : laddr);
- }
-
- public void close()
- {
- impl.close();
- }
-
- public InetAddress getLocalAddress()
- {
- SecurityManager s = System.getSecurityManager();
- // FIXME: JCL p. 510 says this should call checkConnect. But what
- // string should be used as the hostname? Maybe this is just a side
- // effect of calling InetAddress.getLocalHost.
- //
- // And is getOption with SO_BINDADDR the right way to get the address?
- // Doesn't seem to be since this method doesn't throw a SocketException
- // and SO_BINADDR can throw one.
- //
- // Also see RETURNS section in JCL p. 510 about returning any local
- // addr "if the current execution context is not allowed to connect to
- // the network interface that is actually bound to this datagram socket."
- // How is that done? via InetAddress.getLocalHost? But that throws
- // an UnknownHostException and this method doesn't.
- //
- // if (s != null)
- // s.checkConnect("localhost", -1);
- try
- {
- return (InetAddress)impl.getOption(SocketOptions.SO_BINDADDR);
- }
- catch (SocketException ex)
- {
- }
-
- try
- {
- return InetAddress.getLocalHost();
- }
- catch (UnknownHostException ex)
- {
- // FIXME: This should never happen, so how can we avoid this construct?
- return null;
- }
- }
-
- public int getLocalPort()
- {
- return impl.getLocalPort();
- }
-
- public synchronized int getSoTimeout() throws SocketException
- {
- Object timeout = impl.getOption(SocketOptions.SO_TIMEOUT);
- if (timeout instanceof Integer)
- return ((Integer)timeout).intValue();
- else
- return 0;
- }
-
- public synchronized void receive(DatagramPacket p) throws IOException
- {
- SecurityManager s = System.getSecurityManager();
- if (s != null)
- s.checkAccept(p.getAddress().getHostAddress(), p.getPort());
-
- impl.receive(p);
- }
-
- public void send(DatagramPacket p) throws IOException
- {
- // JDK1.2: Don't do security checks if socket is connected; see jdk1.2 api.
- SecurityManager s = System.getSecurityManager();
- if (s != null)
- {
- InetAddress addr = p.getAddress();
- if (addr.isMulticastAddress())
- s.checkMulticast(addr);
- else
- s.checkConnect(addr.getHostAddress(), p.getPort());
- }
-
- // FIXME: if this is a subclass of MulticastSocket, use getTTL for TTL val.
- impl.send(p);
- }
-
- public synchronized void setSoTimeout(int timeout) throws SocketException
- {
- if (timeout < 0)
- throw new IllegalArgumentException("Invalid timeout: " + timeout);
-
- impl.setOption(SocketOptions.SO_TIMEOUT, new Integer(timeout));
- }
-
- // JDK1.2
- // public void connect(InetAddress address, int port)
- // {
- // }
-
- // JDK1.2
- // public void disconnect()
- // {
- // }
-
- // JDK1.2
- // public InetAddress getInetAddress()
- // {
- // }
-
- // JDK1.2
- // public int getPort()
- // {
- // }
-
- /**
- * This method returns the value of the system level socket option
- * SO_RCVBUF, which is used by the operating system to tune buffer
- * sizes for data transfers.
- *
- * @return The receive buffer size.
- *
- * @exception SocketException If an error occurs.
- *
- * @since 1.2
- */
- public int getReceiveBufferSize() throws SocketException
- {
- Object obj = impl.getOption(SocketOptions.SO_RCVBUF);
-
- if (obj instanceof Integer)
- return(((Integer)obj).intValue());
- else
- throw new SocketException("Unexpected type");
- }
-
- /**
- * This method returns the value of the system level socket option
- * SO_SNDBUF, which is used by the operating system to tune buffer
- * sizes for data transfers.
- *
- * @return The send buffer size.
- *
- * @exception SocketException If an error occurs.
- *
- * @since 1.2
- */
- public int getSendBufferSize() throws SocketException
- {
- Object obj = impl.getOption(SocketOptions.SO_SNDBUF);
-
- if (obj instanceof Integer)
- return(((Integer)obj).intValue());
- else
- throw new SocketException("Unexpected type");
- }
-
- /**
- * This method sets the value for the system level socket option
- * SO_RCVBUF to the specified value. Note that valid values for this
- * option are specific to a given operating system.
- *
- * @param size The new receive buffer size.
- *
- * @exception SocketException If an error occurs.
- *
- * @since 1.2
- */
- public void setReceiveBufferSize(int size) throws SocketException
- {
- if (size < 0)
- throw new IllegalArgumentException("Buffer size is less than 0");
-
- impl.setOption(SocketOptions.SO_RCVBUF, new Integer(size));
- }
-
- /**
- * This method sets the value for the system level socket option
- * SO_SNDBUF to the specified value. Note that valid values for this
- * option are specific to a given operating system.
- *
- * @param size The new send buffer size.
- *
- * @exception SocketException If an error occurs.
- *
- * @since 1.2
- */
- public void setSendBufferSize(int size) throws SocketException
- {
- if (size < 0)
- throw new IllegalArgumentException("Buffer size is less than 0");
-
- impl.setOption(SocketOptions.SO_SNDBUF, new Integer(size));
- }
-}
projects / msp430-gcc.git / blobdiff