mappedaddressattribute.java

stun的java实现

/*
 * Stun4j, the OpenSource Java Solution for NAT and Firewall Traversal.
 *
 * Distributable under LGPL license.
 * See terms of license at gnu.org.
 */
package net.java.stun4j.attribute;

/**
 * The MAPPED-ADDRESS attribute indicates the mapped IP address and
 * port.  It consists of an eight bit address family, and a sixteen bit
 * port, followed by a fixed length value representing the IP address.
 *
 *  0                   1                   2                   3
 *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 * |x x x x x x x x|    Family     |           Port                |
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 * |                             Address                           |
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *
 * The port is a network byte ordered representation of the mapped port.
 * The address family is always 0x01, corresponding to IPv4.  The first
 * 8 bits of the MAPPED-ADDRESS are ignored, for the purposes of
 * aligning parameters on natural boundaries.  The IPv4 address is 32
 * bits.
 *
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Organisation: Louis Pasteur University, Strasbourg, France</p>
 *                   <p>Network Research Team (http://www-r2.u-strasbg.fr)</p></p>
 * @author Emil Ivov
 * @version 0.1
 */

public class MappedAddressAttribute extends AddressAttribute
{
    public static final String NAME = "MAPPED-ADDRESS";

    MappedAddressAttribute()
    {
        super(MAPPED_ADDRESS);
    }

}