+++ /dev/null
-/* DatagramPacket.java -- Class to model a packet to be sent via UDP
- 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;
-
-/*
- * 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 packet of data that is to be sent across the network
- * using a connectionless protocol such as UDP. It contains the data
- * to be send, as well as the destination address and port. Note that
- * datagram packets can arrive in any order and are not guaranteed to be
- * delivered at all.
- * <p>
- * This class can also be used for receiving data from the network.
- * <p>
- * Note that for all method below where the buffer length passed by the
- * caller cannot exceed the actually length of the byte array passed as
- * the buffer, if this condition is not true, then the method silently
- * reduces the length value to maximum allowable value.
- *
- * 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 Aarom M. Renn (arenn@urbanophile.com) (Documentation comments)
- * @date April 28, 1999.
- */
-
-public final class DatagramPacket
-{
-/**
- * The data buffer to send
- */
- private byte[] buffer;
-
-/**
- * This is the offset into the buffer to start sending from or receiving to.
- */
- private int offset;
-
-/**
- * The length of the data buffer to send
- */
- private int length;
-
-/**
- * The address to which the packet should be sent or from which it
- * was received
- */
- private InetAddress address;
-
-/**
- * The port to which the packet should be sent or from which it was
- * was received.
- */
- private int port;
-
-/**
- * This method initializes a new instance of <code>DatagramPacket</code>
- * which has the specified buffer, offset, and length.
- *
- * @param buf The buffer for holding the incoming datagram.
- * @param offset The offset into the buffer to start writing.
- * @param length The maximum number of bytes to read.
- *
- * @since Java 1.2
- */
- public DatagramPacket(byte[] buf, int offset, int length)
- {
- if (buf == null)
- throw new NullPointerException("Null buffer");
- if (offset < 0)
- throw new IllegalArgumentException("Invalid offset: " + offset);
- if (length < 0)
- throw new IllegalArgumentException("Invalid length: " + length);
- if (offset + length > buf.length)
- throw new IllegalArgumentException("Potential buffer overflow - offset: "
- + offset + " length: " + length);
-
- buffer = buf;
- this.offset = offset;
- this.length = length;
- this.address = null;
- this.port = -1;
- }
-
-/**
- * Initializes a new instance of <code>DatagramPacket</code> for
- * receiving packets from the network.
- *
- * @param buf A buffer for storing the returned packet data
- * @param length The length of the buffer (must be <= buf.length)
- */
- public DatagramPacket(byte[] buf, int length)
- {
- this(buf, 0, length);
- }
-
-/**
- * Initializes a new instance of <code>DatagramPacket</code> for
- * transmitting packets across the network.
- *
- * @param buf A buffer containing the data to send
- * @param offset The offset into the buffer to start writing from.
- * @param len The length of the buffer (must be <= buf.length)
- * @param addr The address to send to
- * @param port The port to send to
- *
- * @since Java 1.2
- */
- public DatagramPacket(byte[] buf, int offset, int length,
- InetAddress address, int port)
- {
- if (buf == null)
- throw new NullPointerException("Null buffer");
- if (offset < 0)
- throw new IllegalArgumentException("Invalid offset: " + offset);
- if (length < 0)
- throw new IllegalArgumentException("Invalid length: " + length);
- if (offset + length > buf.length)
- throw new IllegalArgumentException("Potential buffer overflow - offset: "
- + offset + " length: " + length);
- if (port < 0 || port > 65535)
- throw new IllegalArgumentException("Invalid port: " + port);
- if (address == null)
- throw new NullPointerException("Null address");
-
- buffer = buf;
- this.offset = offset;
- this.length = length;
- this.address = address;
- this.port = port;
- }
-
-/**
- * Initializes a new instance of <code>DatagramPacket</code> for
- * transmitting packets across the network.
- *
- * @param buf A buffer containing the data to send
- * @param length The length of the buffer (must be <= buf.length)
- * @param address The address to send to
- * @param port The port to send to
- */
- public DatagramPacket(byte[] buf, int length, InetAddress address, int port)
- {
- this(buf, 0, length, address, port);
- }
-
-/**
- * Returns the address that this packet is being sent to or, if it was used
- * to receive a packet, the address that is was received from. If the
- * constructor that doesn not take an address was used to create this object
- * and no packet was actually read into this object, then this method
- * returns <code>null</code>.
- *
- * @return The address for this packet.
- */
- public synchronized InetAddress getAddress()
- {
- return address;
- }
-
-/**
- * Returns the port number this packet is being sent to or, if it was used
- * to receive a packet, the port that it was received from. If the
- * constructor that doesn not take an address was used to create this object
- * and no packet was actually read into this object, then this method
- * will return 0.
- *
- * @return The port number for this packet
- */
- public synchronized int getPort()
- {
- return port;
- }
-
-/**
- * Returns the data buffer for this packet
- *
- * @return This packet's data buffer
- */
- public synchronized byte[] getData()
- {
- return buffer;
- }
-
-/**
- * This method returns the current offset value into the data buffer
- * where data will be sent from.
- *
- * @return The buffer offset.
- *
- * @since Java 1.2
- */
- public synchronized int getOffset()
- {
- return offset;
- }
-
-/**
- * Returns the length of the data in the buffer
- *
- * @return The length of the data
- */
- public synchronized int getLength()
- {
- return length;
- }
-
-/**
- * This sets the address to which the data packet will be transmitted.
- *
- * @param addr The destination address
- */
- public synchronized void setAddress(InetAddress iaddr)
- {
- if (iaddr == null)
- throw new NullPointerException("Null address");
-
- address = iaddr;
- }
-
-/**
- * This sets the port to which the data packet will be transmitted.
- *
- * @param port The destination port
- */
- public synchronized void setPort(int iport)
- {
- if (iport < 0 || iport > 65535)
- throw new IllegalArgumentException("Invalid port: " + iport);
-
- port = iport;
- }
-
-/**
- * Sets the data buffer for this packet.
- *
- * @param buf The new buffer for this packet
- */
- public synchronized void setData(byte[] buf)
- {
- // This form of setData requires setLength to be called separately
- // and subsequently.
- if (buf == null)
- throw new NullPointerException("Null buffer");
-
- buffer = buf;
- }
-
-/**
- * This method sets the data buffer for the packet.
- *
- * @param buf The byte array containing the data for this packet.
- * @param offset The offset into the buffer to start reading data from.
- * @param length The number of bytes of data in the buffer.
- *
- * @since Java 1.2
- */
- public synchronized void setData(byte[] buf, int offset, int length)
- {
- // This form of setData must be used if offset is to be changed.
-
- if (buf == null)
- throw new NullPointerException("Null buffer");
- if (offset < 0)
- throw new IllegalArgumentException("Invalid offset: " + offset);
- if (length < 0)
- throw new IllegalArgumentException("Invalid length: " + length);
- if (offset + length > buf.length)
- throw new IllegalArgumentException("Potential buffer overflow - offset: "
- + offset + " length: " + length);
-
- buffer = buf;
- this.offset = offset;
- this.length = length;
- }
-
-/**
- * Sets the length of the data in the buffer.
- *
- * @param length The new length. (Where len <= buf.length)
- */
- public synchronized void setLength(int length)
- {
- if (length < 0)
- throw new IllegalArgumentException("Invalid length: " + length);
- if (offset + length > buffer.length)
- throw new IllegalArgumentException("Potential buffer overflow - offset: "
- + offset + " length: " + length);
-
- this.length = length;
- }
-} // class DatagramPacket
-
projects / msp430-gcc.git / blobdiff