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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/net/Inet6Address.java
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+/* Inet6Address.java --
+ Copyright (C) 2002, 2003, 2004, 2006 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., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 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 gnu.java.lang.CPStringBuilder;
+
+import java.util.Arrays;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.IOException;
+
+/*
+ * Written using on-line Java Platform 1.4 API Specification and
+ * RFC 1884 (http://www.ietf.org/rfc/rfc1884.txt)
+ *
+ * @author Michael Koch
+ * @status Updated to 1.5. Serialization compatibility is tested.
+ */
+public final class Inet6Address extends InetAddress
+{
+ static final long serialVersionUID = 6880410070516793377L;
+
+ /**
+ * Needed for serialization
+ */
+ byte[] ipaddress;
+
+ /**
+ * The scope ID, if any.
+ * @since 1.5
+ * @serial
+ */
+ private int scope_id;
+
+ /**
+ * The scope ID, if any.
+ * @since 1.5
+ * @serial
+ */
+ private boolean scope_id_set;
+
+ /**
+ * Whether ifname is set or not.
+ * @since 1.5
+ * @serial
+ */
+ private boolean scope_ifname_set;
+
+ /**
+ * Name of the network interface, used only by the serialization methods
+ * @since 1.5
+ * @serial
+ */
+ private String ifname;
+
+ /**
+ * Scope network interface, or <code>null</code>.
+ */
+ private transient NetworkInterface nif;
+
+ /**
+ * The address family of these addresses (used for serialization).
+ */
+ private static final int AF_INET6 = 10;
+
+ /**
+ * Create an Inet6Address object
+ *
+ * @param addr The IP address
+ * @param host The hostname
+ */
+ Inet6Address(byte[] addr, String host)
+ {
+ super(addr, host, AF_INET6);
+ // Super constructor clones the addr. Get a reference to the clone.
+ this.ipaddress = this.addr;
+ ifname = null;
+ scope_ifname_set = scope_id_set = false;
+ scope_id = 0;
+ nif = null;
+ }
+
+ /**
+ * Utility routine to check if the InetAddress is an IP multicast address
+ *
+ * @since 1.1
+ */
+ public boolean isMulticastAddress()
+ {
+ return ipaddress[0] == (byte) 0xFF;
+ }
+
+ /**
+ * Utility routine to check if the InetAddress in a wildcard address
+ *
+ * @since 1.4
+ */
+ public boolean isAnyLocalAddress()
+ {
+ byte[] anylocal = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+
+ return Arrays.equals(ipaddress, anylocal);
+ }
+
+ /**
+ * Utility routine to check if the InetAddress is a loopback address
+ *
+ * @since 1.4
+ */
+ public boolean isLoopbackAddress()
+ {
+ byte[] loopback = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 };
+
+ return Arrays.equals(ipaddress, loopback);
+ }
+
+ /**
+ * Utility routine to check if the InetAddress is an link local address
+ *
+ * @since 1.4
+ */
+ public boolean isLinkLocalAddress()
+ {
+ return ipaddress[0] == 0xFA;
+ }
+
+ /**
+ * Utility routine to check if the InetAddress is a site local address
+ *
+ * @since 1.4
+ */
+ public boolean isSiteLocalAddress()
+ {
+ return ipaddress[0] == 0xFB;
+ }
+
+ /**
+ * Utility routine to check if the multicast address has global scope
+ *
+ * @since 1.4
+ */
+ public boolean isMCGlobal()
+ {
+ if (! isMulticastAddress())
+ return false;
+
+ return (ipaddress[1] & 0x0F) == 0xE;
+ }
+
+ /**
+ * Utility routine to check if the multicast address has node scope
+ *
+ * @since 1.4
+ */
+ public boolean isMCNodeLocal()
+ {
+ if (! isMulticastAddress())
+ return false;
+
+ return (ipaddress[1] & 0x0F) == 0x1;
+ }
+
+ /**
+ * Utility routine to check if the multicast address has link scope
+ *
+ * @since 1.4
+ */
+ public boolean isMCLinkLocal()
+ {
+ if (! isMulticastAddress())
+ return false;
+
+ return (ipaddress[1] & 0x0F) == 0x2;
+ }
+
+ /**
+ * Utility routine to check if the multicast address has site scope
+ *
+ * @since 1.4
+ */
+ public boolean isMCSiteLocal()
+ {
+ if (! isMulticastAddress())
+ return false;
+
+ return (ipaddress[1] & 0x0F) == 0x5;
+ }
+
+ /**
+ * Utility routine to check if the multicast address has organization scope
+ *
+ * @since 1.4
+ */
+ public boolean isMCOrgLocal()
+ {
+ if (! isMulticastAddress())
+ return false;
+
+ return (ipaddress[1] & 0x0F) == 0x8;
+ }
+
+ /**
+ * Returns the raw IP address of this InetAddress object. The result is in
+ * network byte order: the highest order byte of the address is i
+ * n getAddress()[0]
+ */
+ public byte[] getAddress()
+ {
+ return (byte[]) ipaddress.clone();
+ }
+
+ /**
+ * Creates a scoped Inet6Address where the scope has an integer id.
+ *
+ * @throws UnkownHostException if the address is an invalid number of bytes.
+ * @since 1.5
+ */
+ public static Inet6Address getByAddress(String host, byte[] addr,
+ int scopeId)
+ throws UnknownHostException
+ {
+ if( addr.length != 16 )
+ throw new UnknownHostException("Illegal address length: " + addr.length
+ + " bytes.");
+ Inet6Address ip = new Inet6Address( addr, host );
+ ip.scope_id = scopeId;
+ ip.scope_id_set = true;
+ return ip;
+ }
+
+ /**
+ * Creates a scoped Inet6Address where the scope is a given
+ * NetworkInterface.
+ *
+ * @throws UnkownHostException if the address is an invalid number of bytes.
+ * @since 1.5
+ */
+ public static Inet6Address getByAddress(String host, byte[] addr,
+ NetworkInterface nif)
+ throws UnknownHostException
+ {
+ if( addr.length != 16 )
+ throw new UnknownHostException("Illegal address length: " + addr.length
+ + " bytes.");
+ Inet6Address ip = new Inet6Address( addr, host );
+ ip.nif = nif;
+
+ return ip;
+ }
+
+ /**
+ * Returns the <code>NetworkInterface</code> of the address scope
+ * if it is a scoped address and the scope is given in the form of a
+ * NetworkInterface.
+ * (I.e. the address was created using the
+ * getByAddress(String, byte[], NetworkInterface) method)
+ * Otherwise this method returns <code>null</code>.
+ * @since 1.5
+ */
+ public NetworkInterface getScopedInterface()
+ {
+ return nif;
+ }
+
+ /**
+ * Returns the scope ID of the address scope if it is a scoped adress using
+ * an integer to identify the scope.
+ *
+ * Otherwise this method returns 0.
+ * @since 1.5
+ */
+ public int getScopeId()
+ {
+ // check scope_id_set because some JDK-serialized objects seem to have
+ // scope_id set to a nonzero value even when scope_id_set == false
+ if( scope_id_set )
+ return scope_id;
+ return 0;
+ }
+
+ /**
+ * Returns the IP address string in textual presentation
+ */
+ public String getHostAddress()
+ {
+ CPStringBuilder sbuf = new CPStringBuilder(40);
+
+ for (int i = 0; i < 16; i += 2)
+ {
+ int x = ((ipaddress[i] & 0xFF) << 8) | (ipaddress[i + 1] & 0xFF);
+
+ if (i > 0)
+ sbuf.append(':');
+
+ sbuf.append(Integer.toHexString(x));
+ }
+ if( nif != null )
+ sbuf.append( "%" + nif.getName() );
+ else if( scope_id_set )
+ sbuf.append( "%" + scope_id );
+
+ return sbuf.toString();
+ }
+
+ /**
+ * Returns a hashcode for this IP address
+ * (The hashcode is independent of scope)
+ */
+ public int hashCode()
+ {
+ return super.hashCode();
+ }
+
+ /**
+ * Compares this object against the specified object
+ */
+ public boolean equals(Object obj)
+ {
+ if (! (obj instanceof Inet6Address))
+ return false;
+
+ Inet6Address ip = (Inet6Address)obj;
+ if (ipaddress.length != ip.ipaddress.length)
+ return false;
+
+ for (int i = 0; i < ip.ipaddress.length; i++)
+ if (ipaddress[i] != ip.ipaddress[i])
+ return false;
+
+ if( ip.nif != null && nif != null )
+ return nif.equals( ip.nif );
+ if( ip.nif != nif )
+ return false;
+ if( ip.scope_id_set != scope_id_set )
+ return false;
+ if( scope_id_set )
+ return (scope_id == ip.scope_id);
+ return true;
+ }
+
+ /**
+ * Utility routine to check if the InetAddress is an
+ * IPv4 compatible IPv6 address
+ *
+ * @since 1.4
+ */
+ public boolean isIPv4CompatibleAddress()
+ {
+ if (ipaddress[0] != 0x00 || ipaddress[1] != 0x00 || ipaddress[2] != 0x00
+ || ipaddress[3] != 0x00 || ipaddress[4] != 0x00
+ || ipaddress[5] != 0x00 || ipaddress[6] != 0x00
+ || ipaddress[7] != 0x00 || ipaddress[8] != 0x00
+ || ipaddress[9] != 0x00 || ipaddress[10] != 0x00
+ || ipaddress[11] != 0x00)
+ return false;
+
+ return true;
+ }
+
+ /**
+ * Required for 1.5-compatible serialization.
+ * @since 1.5
+ */
+ private void readObject(ObjectInputStream s)
+ throws IOException, ClassNotFoundException
+ {
+ s.defaultReadObject();
+ try
+ {
+ if( scope_ifname_set )
+ nif = NetworkInterface.getByName( ifname );
+ }
+ catch( SocketException se )
+ {
+ // FIXME: Ignore this? or throw an IOException?
+ }
+ }
+
+ /**
+ * Required for 1.5-compatible serialization.
+ * @since 1.5
+ */
+ private void writeObject(ObjectOutputStream s)
+ throws IOException
+ {
+ if( nif != null )
+ {
+ ifname = nif.getName();
+ scope_ifname_set = true;
+ }
+ s.defaultWriteObject();
+ }
+}