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+/* Inet4Address.java
+ Copyright (C) 2002 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;
+import java.io.ObjectStreamException;
+
+/**
+ * @author Michael Koch
+ * @date August 3, 2002.
+ */
+
+/*
+ * Written using on-line Java Platform 1.4 API Specification and
+ * RFC 1884 (http://www.ietf.org/rfc/rfc1884.txt),
+ * RFC 1918 (http://www.ietf.org/rfc/rfc1918.txt),
+ * RFC 2365 (http://www.ietf.org/rfc/rfc2365.txt)
+ * Status: Believed complete and correct.
+ */
+
+public final class Inet4Address extends InetAddress
+{
+ static final long serialVersionUID = 7615067291688066509L;
+
+ /**
+ * needed for serialization
+ */
+ private Object writeReplace () throws ObjectStreamException
+ {
+ return new InetAddress (addr, hostName);
+ }
+
+ /**
+ * Creates a Inet4Address
+ *
+ * @param addr The IP address
+ * @param host The Hostname
+ */
+ protected Inet4Address(byte[] addr, String host)
+ {
+ super (addr, host);
+ }
+
+ /**
+ * Checks if the address is a multicast address
+ *
+ * @since 1.1
+ */
+ public boolean isMulticastAddress ()
+ {
+ return (addr [0] & 0xF0) == 0xE0;
+ }
+
+ /**
+ * Checks if this address is a loopback address
+ */
+ public boolean isLoopbackAddress ()
+ {
+ return addr [0] == 0x7F;
+ }
+
+ /**
+ * Checks if this address is a wildcard address
+ *
+ * @since 1.4
+ */
+ public boolean isAnyLocalAddress ()
+ {
+ byte[] anylocal = { 0, 0, 0, 0 };
+
+ return addr == anylocal;
+ }
+
+ /**
+ * Checks if this address is a link local address
+ *
+ * @since 1.4
+ */
+ public boolean isLinkLocalAddress ()
+ {
+ // XXX: This seems to net exist with IPv4 addresses
+ return false;
+ }
+
+ /**
+ * Checks if this address is a site local address
+ *
+ * @since 1.4
+ */
+ public boolean isSiteLocalAddress ()
+ {
+ // 10.0.0.0/8
+ if (addr [0] == 0x0A)
+ return true;
+
+ // XXX: Suns JDK 1.4.1 (on Linux) seems to have a bug here:
+ // it says 172.16.0.0 - 172.255.255.255 are site local addresses
+ //
+ // 172.16.0.0/12
+ if (addr [0] == 0xAC && (addr [1] & 0xF0) == 0x01)
+ return true;
+
+ // 192.168.0.0/16
+ if (addr [0] == 0xC0 && addr [1] == 0xA8)
+ return true;
+
+ // XXX: Do we need to check more addresses here ?
+ return false;
+ }
+
+ /**
+ * Checks if this multicast address has global scope
+ *
+ * @since 1.4
+ */
+ public boolean isMCGlobal ()
+ {
+ // XXX: This seems to net exist with IPv4 addresses
+ return false;
+ }
+
+ /**
+ * Checks if this multicast address has node scope
+ *
+ * @since 1.4
+ */
+ public boolean isMCNodeLocal ()
+ {
+ // XXX: This seems to net exist with IPv4 addresses
+ return false;
+ }
+
+ /**
+ * Checks if this multicast address has link scope
+ *
+ * @since 1.4
+ */
+ public boolean isMCLinkLocal ()
+ {
+ if (!isMulticastAddress ())
+ return false;
+
+ return (addr [0] == 0xE0)
+ && (addr [1] == 0x00)
+ && (addr [2] == 0x00);
+ }
+
+ /**
+ * Checks if this multicast address has site scope
+ *
+ * @since 1.4
+ */
+ public boolean isMCSiteLocal ()
+ {
+ // XXX: This seems to net exist with IPv4 addresses
+ return false;
+ }
+
+ /**
+ * Checks if this multicast address has organization scope
+ *
+ * @since 1.4
+ */
+ public boolean isMCOrgLocal ()
+ {
+ // XXX: This seems to net exist with IPv4 addresses
+ return false;
+ }
+
+ /**
+ * Returns the address of the current instance
+ */
+ public byte[] getAddress ()
+ {
+ return addr;
+ }
+
+ /**
+ * Returns the address as string
+ *
+ * @since 1.0.2
+ */
+ public String getHostAddress ()
+ {
+ StringBuffer sbuf = new StringBuffer (40);
+ int len = addr.length;
+ int i = 0;
+
+ for ( ; ; )
+ {
+ sbuf.append (addr [i] & 0xFF);
+ i++;
+
+ if (i == len)
+ break;
+
+ sbuf.append ('.');
+ }
+
+ return sbuf.toString ();
+ }
+
+ /**
+ * Computes the hashcode of the instance
+ */
+ public int hashCode ()
+ {
+ int hash = 0;
+ int len = addr.length;
+ int i = len > 4 ? len - 4 : 0;
+
+ for ( ; i < len; i++)
+ hash = (hash << 8) | (addr [i] & 0xFF);
+
+ return hash;
+ }
+
+ /**
+ * Compare the current Inet4Address instance with obj
+ *
+ * @param obj Object to compare with
+ */
+ public boolean equals (Object obj)
+ {
+ if (obj == null || ! (obj instanceof InetAddress))
+ return false;
+
+ byte[] addr1 = addr;
+ byte[] addr2 = ((InetAddress) obj).addr;
+
+ if (addr1.length != addr2.length)
+ return false;
+
+ for (int i = addr1.length; --i >= 0; )
+ if (addr1 [i] != addr2 [i])
+ return false;
+
+ return true;
+ }
+} // class Inet4Address
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