--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/java/net/Inet6Address.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,921 @@
+/*
+ * Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.net;
+
+import java.io.IOException;
+import java.io.InvalidObjectException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.ObjectStreamField;
+import java.util.Enumeration;
+import java.util.Arrays;
+
+/**
+ * This class represents an Internet Protocol version 6 (IPv6) address.
+ * Defined by <a href="http://www.ietf.org/rfc/rfc2373.txt">
+ * <i>RFC 2373: IP Version 6 Addressing Architecture</i></a>.
+ *
+ * <h3> <a id="format">Textual representation of IP addresses</a> </h3>
+ *
+ * Textual representation of IPv6 address used as input to methods
+ * takes one of the following forms:
+ *
+ * <ol>
+ * <li><p> <a id="lform">The preferred form</a> is x:x:x:x:x:x:x:x,
+ * where the 'x's are
+ * the hexadecimal values of the eight 16-bit pieces of the
+ * address. This is the full form. For example,
+ *
+ * <blockquote><ul style="list-style-type:none">
+ * <li>{@code 1080:0:0:0:8:800:200C:417A}</li>
+ * </ul></blockquote>
+ *
+ * <p> Note that it is not necessary to write the leading zeros in
+ * an individual field. However, there must be at least one numeral
+ * in every field, except as described below.</li>
+ *
+ * <li><p> Due to some methods of allocating certain styles of IPv6
+ * addresses, it will be common for addresses to contain long
+ * strings of zero bits. In order to make writing addresses
+ * containing zero bits easier, a special syntax is available to
+ * compress the zeros. The use of "::" indicates multiple groups
+ * of 16-bits of zeros. The "::" can only appear once in an address.
+ * The "::" can also be used to compress the leading and/or trailing
+ * zeros in an address. For example,
+ *
+ * <blockquote><ul style="list-style-type:none">
+ * <li>{@code 1080::8:800:200C:417A}</li>
+ * </ul></blockquote>
+ *
+ * <li><p> An alternative form that is sometimes more convenient
+ * when dealing with a mixed environment of IPv4 and IPv6 nodes is
+ * x:x:x:x:x:x:d.d.d.d, where the 'x's are the hexadecimal values
+ * of the six high-order 16-bit pieces of the address, and the 'd's
+ * are the decimal values of the four low-order 8-bit pieces of the
+ * standard IPv4 representation address, for example,
+ *
+ * <blockquote><ul style="list-style-type:none">
+ * <li>{@code ::FFFF:129.144.52.38}</li>
+ * <li>{@code ::129.144.52.38}</li>
+ * </ul></blockquote>
+ *
+ * <p> where "::FFFF:d.d.d.d" and "::d.d.d.d" are, respectively, the
+ * general forms of an IPv4-mapped IPv6 address and an
+ * IPv4-compatible IPv6 address. Note that the IPv4 portion must be
+ * in the "d.d.d.d" form. The following forms are invalid:
+ *
+ * <blockquote><ul style="list-style-type:none">
+ * <li>{@code ::FFFF:d.d.d}</li>
+ * <li>{@code ::FFFF:d.d}</li>
+ * <li>{@code ::d.d.d}</li>
+ * <li>{@code ::d.d}</li>
+ * </ul></blockquote>
+ *
+ * <p> The following form:
+ *
+ * <blockquote><ul style="list-style-type:none">
+ * <li>{@code ::FFFF:d}</li>
+ * </ul></blockquote>
+ *
+ * <p> is valid, however it is an unconventional representation of
+ * the IPv4-compatible IPv6 address,
+ *
+ * <blockquote><ul style="list-style-type:none">
+ * <li>{@code ::255.255.0.d}</li>
+ * </ul></blockquote>
+ *
+ * <p> while "::d" corresponds to the general IPv6 address
+ * "0:0:0:0:0:0:0:d".</li>
+ * </ol>
+ *
+ * <p> For methods that return a textual representation as output
+ * value, the full form is used. Inet6Address will return the full
+ * form because it is unambiguous when used in combination with other
+ * textual data.
+ *
+ * <h4> Special IPv6 address </h4>
+ *
+ * <blockquote>
+ * <table class="borderless">
+ * <caption style="display:none">Description of IPv4-mapped address</caption>
+ * <tr><th style="vertical-align:top; padding-right:2px"><i>IPv4-mapped address</i></th>
+ * <td>Of the form ::ffff:w.x.y.z, this IPv6 address is used to
+ * represent an IPv4 address. It allows the native program to
+ * use the same address data structure and also the same
+ * socket when communicating with both IPv4 and IPv6 nodes.
+ *
+ * <p>In InetAddress and Inet6Address, it is used for internal
+ * representation; it has no functional role. Java will never
+ * return an IPv4-mapped address. These classes can take an
+ * IPv4-mapped address as input, both in byte array and text
+ * representation. However, it will be converted into an IPv4
+ * address.</td></tr>
+ * </table></blockquote>
+ *
+ * <h4><a id="scoped">Textual representation of IPv6 scoped addresses</a></h4>
+ *
+ * <p> The textual representation of IPv6 addresses as described above can be
+ * extended to specify IPv6 scoped addresses. This extension to the basic
+ * addressing architecture is described in [draft-ietf-ipngwg-scoping-arch-04.txt].
+ *
+ * <p> Because link-local and site-local addresses are non-global, it is possible
+ * that different hosts may have the same destination address and may be
+ * reachable through different interfaces on the same originating system. In
+ * this case, the originating system is said to be connected to multiple zones
+ * of the same scope. In order to disambiguate which is the intended destination
+ * zone, it is possible to append a zone identifier (or <i>scope_id</i>) to an
+ * IPv6 address.
+ *
+ * <p> The general format for specifying the <i>scope_id</i> is the following:
+ *
+ * <blockquote><i>IPv6-address</i>%<i>scope_id</i></blockquote>
+ * <p> The IPv6-address is a literal IPv6 address as described above.
+ * The <i>scope_id</i> refers to an interface on the local system, and it can be
+ * specified in two ways.
+ * <ol><li><i>As a numeric identifier.</i> This must be a positive integer
+ * that identifies the particular interface and scope as understood by the
+ * system. Usually, the numeric values can be determined through administration
+ * tools on the system. Each interface may have multiple values, one for each
+ * scope. If the scope is unspecified, then the default value used is zero.</li>
+ * <li><i>As a string.</i> This must be the exact string that is returned by
+ * {@link java.net.NetworkInterface#getName()} for the particular interface in
+ * question. When an Inet6Address is created in this way, the numeric scope-id
+ * is determined at the time the object is created by querying the relevant
+ * NetworkInterface.</li></ol>
+ *
+ * <p> Note also, that the numeric <i>scope_id</i> can be retrieved from
+ * Inet6Address instances returned from the NetworkInterface class. This can be
+ * used to find out the current scope ids configured on the system.
+ * @since 1.4
+ */
+
+public final
+class Inet6Address extends InetAddress {
+ static final int INADDRSZ = 16;
+
+ /*
+ * cached scope_id - for link-local address use only.
+ */
+ private transient int cached_scope_id; // 0
+
+ private class Inet6AddressHolder {
+
+ private Inet6AddressHolder() {
+ ipaddress = new byte[INADDRSZ];
+ }
+
+ private Inet6AddressHolder(
+ byte[] ipaddress, int scope_id, boolean scope_id_set,
+ NetworkInterface ifname, boolean scope_ifname_set)
+ {
+ this.ipaddress = ipaddress;
+ this.scope_id = scope_id;
+ this.scope_id_set = scope_id_set;
+ this.scope_ifname_set = scope_ifname_set;
+ this.scope_ifname = ifname;
+ }
+
+ /**
+ * Holds a 128-bit (16 bytes) IPv6 address.
+ */
+ byte[] ipaddress;
+
+ /**
+ * scope_id. The scope specified when the object is created. If the object
+ * is created with an interface name, then the scope_id is not determined
+ * until the time it is needed.
+ */
+ int scope_id; // 0
+
+ /**
+ * This will be set to true when the scope_id field contains a valid
+ * integer scope_id.
+ */
+ boolean scope_id_set; // false
+
+ /**
+ * scoped interface. scope_id is derived from this as the scope_id of the first
+ * address whose scope is the same as this address for the named interface.
+ */
+ NetworkInterface scope_ifname; // null
+
+ /**
+ * set if the object is constructed with a scoped
+ * interface instead of a numeric scope id.
+ */
+ boolean scope_ifname_set; // false;
+
+ void setAddr(byte addr[]) {
+ if (addr.length == INADDRSZ) { // normal IPv6 address
+ System.arraycopy(addr, 0, ipaddress, 0, INADDRSZ);
+ }
+ }
+
+ void init(byte addr[], int scope_id) {
+ setAddr(addr);
+
+ if (scope_id >= 0) {
+ this.scope_id = scope_id;
+ this.scope_id_set = true;
+ }
+ }
+
+ void init(byte addr[], NetworkInterface nif)
+ throws UnknownHostException
+ {
+ setAddr(addr);
+
+ if (nif != null) {
+ this.scope_id = deriveNumericScope(ipaddress, nif);
+ this.scope_id_set = true;
+ this.scope_ifname = nif;
+ this.scope_ifname_set = true;
+ }
+ }
+
+ String getHostAddress() {
+ String s = numericToTextFormat(ipaddress);
+ if (scope_ifname != null) { /* must check this first */
+ s = s + "%" + scope_ifname.getName();
+ } else if (scope_id_set) {
+ s = s + "%" + scope_id;
+ }
+ return s;
+ }
+
+ public boolean equals(Object o) {
+ if (! (o instanceof Inet6AddressHolder)) {
+ return false;
+ }
+ Inet6AddressHolder that = (Inet6AddressHolder)o;
+
+ return Arrays.equals(this.ipaddress, that.ipaddress);
+ }
+
+ public int hashCode() {
+ if (ipaddress != null) {
+
+ int hash = 0;
+ int i=0;
+ while (i<INADDRSZ) {
+ int j=0;
+ int component=0;
+ while (j<4 && i<INADDRSZ) {
+ component = (component << 8) + ipaddress[i];
+ j++;
+ i++;
+ }
+ hash += component;
+ }
+ return hash;
+
+ } else {
+ return 0;
+ }
+ }
+
+ 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 true;
+ }
+ return false;
+ }
+
+ boolean isMulticastAddress() {
+ return ((ipaddress[0] & 0xff) == 0xff);
+ }
+
+ boolean isAnyLocalAddress() {
+ byte test = 0x00;
+ for (int i = 0; i < INADDRSZ; i++) {
+ test |= ipaddress[i];
+ }
+ return (test == 0x00);
+ }
+
+ boolean isLoopbackAddress() {
+ byte test = 0x00;
+ for (int i = 0; i < 15; i++) {
+ test |= ipaddress[i];
+ }
+ return (test == 0x00) && (ipaddress[15] == 0x01);
+ }
+
+ boolean isLinkLocalAddress() {
+ return ((ipaddress[0] & 0xff) == 0xfe
+ && (ipaddress[1] & 0xc0) == 0x80);
+ }
+
+
+ boolean isSiteLocalAddress() {
+ return ((ipaddress[0] & 0xff) == 0xfe
+ && (ipaddress[1] & 0xc0) == 0xc0);
+ }
+
+ boolean isMCGlobal() {
+ return ((ipaddress[0] & 0xff) == 0xff
+ && (ipaddress[1] & 0x0f) == 0x0e);
+ }
+
+ boolean isMCNodeLocal() {
+ return ((ipaddress[0] & 0xff) == 0xff
+ && (ipaddress[1] & 0x0f) == 0x01);
+ }
+
+ boolean isMCLinkLocal() {
+ return ((ipaddress[0] & 0xff) == 0xff
+ && (ipaddress[1] & 0x0f) == 0x02);
+ }
+
+ boolean isMCSiteLocal() {
+ return ((ipaddress[0] & 0xff) == 0xff
+ && (ipaddress[1] & 0x0f) == 0x05);
+ }
+
+ boolean isMCOrgLocal() {
+ return ((ipaddress[0] & 0xff) == 0xff
+ && (ipaddress[1] & 0x0f) == 0x08);
+ }
+ }
+
+ private final transient Inet6AddressHolder holder6;
+
+ private static final long serialVersionUID = 6880410070516793377L;
+
+ // Perform native initialization
+ static { init(); }
+
+ Inet6Address() {
+ super();
+ holder.init(null, IPv6);
+ holder6 = new Inet6AddressHolder();
+ }
+
+ /* checking of value for scope_id should be done by caller
+ * scope_id must be >= 0, or -1 to indicate not being set
+ */
+ Inet6Address(String hostName, byte addr[], int scope_id) {
+ holder.init(hostName, IPv6);
+ holder6 = new Inet6AddressHolder();
+ holder6.init(addr, scope_id);
+ }
+
+ Inet6Address(String hostName, byte addr[]) {
+ holder6 = new Inet6AddressHolder();
+ try {
+ initif (hostName, addr, null);
+ } catch (UnknownHostException e) {} /* cant happen if ifname is null */
+ }
+
+ Inet6Address (String hostName, byte addr[], NetworkInterface nif)
+ throws UnknownHostException
+ {
+ holder6 = new Inet6AddressHolder();
+ initif (hostName, addr, nif);
+ }
+
+ Inet6Address (String hostName, byte addr[], String ifname)
+ throws UnknownHostException
+ {
+ holder6 = new Inet6AddressHolder();
+ initstr (hostName, addr, ifname);
+ }
+
+ /**
+ * Create an Inet6Address in the exact manner of {@link
+ * InetAddress#getByAddress(String,byte[])} except that the IPv6 scope_id is
+ * set to the value corresponding to the given interface for the address
+ * type specified in {@code addr}. The call will fail with an
+ * UnknownHostException if the given interface does not have a numeric
+ * scope_id assigned for the given address type (eg. link-local or site-local).
+ * See <a href="Inet6Address.html#scoped">here</a> for a description of IPv6
+ * scoped addresses.
+ *
+ * @param host the specified host
+ * @param addr the raw IP address in network byte order
+ * @param nif an interface this address must be associated with.
+ * @return an Inet6Address object created from the raw IP address.
+ * @throws UnknownHostException
+ * if IP address is of illegal length, or if the interface does not
+ * have a numeric scope_id assigned for the given address type.
+ *
+ * @since 1.5
+ */
+ public static Inet6Address getByAddress(String host, byte[] addr,
+ NetworkInterface nif)
+ throws UnknownHostException
+ {
+ if (host != null && host.length() > 0 && host.charAt(0) == '[') {
+ if (host.charAt(host.length()-1) == ']') {
+ host = host.substring(1, host.length() -1);
+ }
+ }
+ if (addr != null) {
+ if (addr.length == Inet6Address.INADDRSZ) {
+ return new Inet6Address(host, addr, nif);
+ }
+ }
+ throw new UnknownHostException("addr is of illegal length");
+ }
+
+ /**
+ * Create an Inet6Address in the exact manner of {@link
+ * InetAddress#getByAddress(String,byte[])} except that the IPv6 scope_id is
+ * set to the given numeric value. The scope_id is not checked to determine
+ * if it corresponds to any interface on the system.
+ * See <a href="Inet6Address.html#scoped">here</a> for a description of IPv6
+ * scoped addresses.
+ *
+ * @param host the specified host
+ * @param addr the raw IP address in network byte order
+ * @param scope_id the numeric scope_id for the address.
+ * @return an Inet6Address object created from the raw IP address.
+ * @throws UnknownHostException if IP address is of illegal length.
+ *
+ * @since 1.5
+ */
+ public static Inet6Address getByAddress(String host, byte[] addr,
+ int scope_id)
+ throws UnknownHostException
+ {
+ if (host != null && host.length() > 0 && host.charAt(0) == '[') {
+ if (host.charAt(host.length()-1) == ']') {
+ host = host.substring(1, host.length() -1);
+ }
+ }
+ if (addr != null) {
+ if (addr.length == Inet6Address.INADDRSZ) {
+ return new Inet6Address(host, addr, scope_id);
+ }
+ }
+ throw new UnknownHostException("addr is of illegal length");
+ }
+
+ private void initstr(String hostName, byte addr[], String ifname)
+ throws UnknownHostException
+ {
+ try {
+ NetworkInterface nif = NetworkInterface.getByName (ifname);
+ if (nif == null) {
+ throw new UnknownHostException ("no such interface " + ifname);
+ }
+ initif (hostName, addr, nif);
+ } catch (SocketException e) {
+ throw new UnknownHostException ("SocketException thrown" + ifname);
+ }
+ }
+
+ private void initif(String hostName, byte addr[], NetworkInterface nif)
+ throws UnknownHostException
+ {
+ int family = -1;
+ holder6.init(addr, nif);
+
+ if (addr.length == INADDRSZ) { // normal IPv6 address
+ family = IPv6;
+ }
+ holder.init(hostName, family);
+ }
+
+ /* check the two Ipv6 addresses and return false if they are both
+ * non global address types, but not the same.
+ * (ie. one is sitelocal and the other linklocal)
+ * return true otherwise.
+ */
+
+ private static boolean isDifferentLocalAddressType(
+ byte[] thisAddr, byte[] otherAddr) {
+
+ if (Inet6Address.isLinkLocalAddress(thisAddr) &&
+ !Inet6Address.isLinkLocalAddress(otherAddr)) {
+ return false;
+ }
+ if (Inet6Address.isSiteLocalAddress(thisAddr) &&
+ !Inet6Address.isSiteLocalAddress(otherAddr)) {
+ return false;
+ }
+ return true;
+ }
+
+ private static int deriveNumericScope (byte[] thisAddr, NetworkInterface ifc) throws UnknownHostException {
+ Enumeration<InetAddress> addresses = ifc.getInetAddresses();
+ while (addresses.hasMoreElements()) {
+ InetAddress addr = addresses.nextElement();
+ if (!(addr instanceof Inet6Address)) {
+ continue;
+ }
+ Inet6Address ia6_addr = (Inet6Address)addr;
+ /* check if site or link local prefixes match */
+ if (!isDifferentLocalAddressType(thisAddr, ia6_addr.getAddress())){
+ /* type not the same, so carry on searching */
+ continue;
+ }
+ /* found a matching address - return its scope_id */
+ return ia6_addr.getScopeId();
+ }
+ throw new UnknownHostException ("no scope_id found");
+ }
+
+ private int deriveNumericScope (String ifname) throws UnknownHostException {
+ Enumeration<NetworkInterface> en;
+ try {
+ en = NetworkInterface.getNetworkInterfaces();
+ } catch (SocketException e) {
+ throw new UnknownHostException ("could not enumerate local network interfaces");
+ }
+ while (en.hasMoreElements()) {
+ NetworkInterface ifc = en.nextElement();
+ if (ifc.getName().equals (ifname)) {
+ return deriveNumericScope(holder6.ipaddress, ifc);
+ }
+ }
+ throw new UnknownHostException ("No matching address found for interface : " +ifname);
+ }
+
+ /**
+ * @serialField ipaddress byte[]
+ * @serialField scope_id int
+ * @serialField scope_id_set boolean
+ * @serialField scope_ifname_set boolean
+ * @serialField ifname String
+ */
+
+ private static final ObjectStreamField[] serialPersistentFields = {
+ new ObjectStreamField("ipaddress", byte[].class),
+ new ObjectStreamField("scope_id", int.class),
+ new ObjectStreamField("scope_id_set", boolean.class),
+ new ObjectStreamField("scope_ifname_set", boolean.class),
+ new ObjectStreamField("ifname", String.class)
+ };
+
+ private static final jdk.internal.misc.Unsafe UNSAFE
+ = jdk.internal.misc.Unsafe.getUnsafe();
+ private static final long FIELDS_OFFSET = UNSAFE.objectFieldOffset(
+ Inet6Address.class, "holder6");
+
+ /**
+ * restore the state of this object from stream
+ * including the scope information, only if the
+ * scoped interface name is valid on this system
+ */
+ private void readObject(ObjectInputStream s)
+ throws IOException, ClassNotFoundException {
+ NetworkInterface scope_ifname = null;
+
+ if (getClass().getClassLoader() != null) {
+ throw new SecurityException ("invalid address type");
+ }
+
+ ObjectInputStream.GetField gf = s.readFields();
+ byte[] ipaddress = (byte[])gf.get("ipaddress", null);
+ int scope_id = gf.get("scope_id", -1);
+ boolean scope_id_set = gf.get("scope_id_set", false);
+ boolean scope_ifname_set = gf.get("scope_ifname_set", false);
+ String ifname = (String)gf.get("ifname", null);
+
+ if (ifname != null && !"".equals (ifname)) {
+ try {
+ scope_ifname = NetworkInterface.getByName(ifname);
+ if (scope_ifname == null) {
+ /* the interface does not exist on this system, so we clear
+ * the scope information completely */
+ scope_id_set = false;
+ scope_ifname_set = false;
+ scope_id = 0;
+ } else {
+ scope_ifname_set = true;
+ try {
+ scope_id = deriveNumericScope (ipaddress, scope_ifname);
+ } catch (UnknownHostException e) {
+ // typically should not happen, but it may be that
+ // the machine being used for deserialization has
+ // the same interface name but without IPv6 configured.
+ }
+ }
+ } catch (SocketException e) {}
+ }
+
+ /* if ifname was not supplied, then the numeric info is used */
+
+ ipaddress = ipaddress.clone();
+
+ // Check that our invariants are satisfied
+ if (ipaddress.length != INADDRSZ) {
+ throw new InvalidObjectException("invalid address length: "+
+ ipaddress.length);
+ }
+
+ if (holder.getFamily() != IPv6) {
+ throw new InvalidObjectException("invalid address family type");
+ }
+
+ Inet6AddressHolder h = new Inet6AddressHolder(
+ ipaddress, scope_id, scope_id_set, scope_ifname, scope_ifname_set
+ );
+
+ UNSAFE.putObject(this, FIELDS_OFFSET, h);
+ }
+
+ /**
+ * default behavior is overridden in order to write the
+ * scope_ifname field as a String, rather than a NetworkInterface
+ * which is not serializable
+ */
+ private synchronized void writeObject(ObjectOutputStream s)
+ throws IOException
+ {
+ String ifname = null;
+
+ if (holder6.scope_ifname != null) {
+ ifname = holder6.scope_ifname.getName();
+ holder6.scope_ifname_set = true;
+ }
+ ObjectOutputStream.PutField pfields = s.putFields();
+ pfields.put("ipaddress", holder6.ipaddress);
+ pfields.put("scope_id", holder6.scope_id);
+ pfields.put("scope_id_set", holder6.scope_id_set);
+ pfields.put("scope_ifname_set", holder6.scope_ifname_set);
+ pfields.put("ifname", ifname);
+ s.writeFields();
+ }
+
+ /**
+ * Utility routine to check if the InetAddress is an IP multicast
+ * address. 11111111 at the start of the address identifies the
+ * address as being a multicast address.
+ *
+ * @return a {@code boolean} indicating if the InetAddress is an IP
+ * multicast address
+ */
+ @Override
+ public boolean isMulticastAddress() {
+ return holder6.isMulticastAddress();
+ }
+
+ /**
+ * Utility routine to check if the InetAddress is a wildcard address.
+ *
+ * @return a {@code boolean} indicating if the Inetaddress is
+ * a wildcard address.
+ */
+ @Override
+ public boolean isAnyLocalAddress() {
+ return holder6.isAnyLocalAddress();
+ }
+
+ /**
+ * Utility routine to check if the InetAddress is a loopback address.
+ *
+ * @return a {@code boolean} indicating if the InetAddress is a loopback
+ * address; or false otherwise.
+ */
+ @Override
+ public boolean isLoopbackAddress() {
+ return holder6.isLoopbackAddress();
+ }
+
+ /**
+ * Utility routine to check if the InetAddress is an link local address.
+ *
+ * @return a {@code boolean} indicating if the InetAddress is a link local
+ * address; or false if address is not a link local unicast address.
+ */
+ @Override
+ public boolean isLinkLocalAddress() {
+ return holder6.isLinkLocalAddress();
+ }
+
+ /* static version of above */
+ static boolean isLinkLocalAddress(byte[] ipaddress) {
+ return ((ipaddress[0] & 0xff) == 0xfe
+ && (ipaddress[1] & 0xc0) == 0x80);
+ }
+
+ /**
+ * Utility routine to check if the InetAddress is a site local address.
+ *
+ * @return a {@code boolean} indicating if the InetAddress is a site local
+ * address; or false if address is not a site local unicast address.
+ */
+ @Override
+ public boolean isSiteLocalAddress() {
+ return holder6.isSiteLocalAddress();
+ }
+
+ /* static version of above */
+ static boolean isSiteLocalAddress(byte[] ipaddress) {
+ return ((ipaddress[0] & 0xff) == 0xfe
+ && (ipaddress[1] & 0xc0) == 0xc0);
+ }
+
+ /**
+ * Utility routine to check if the multicast address has global scope.
+ *
+ * @return a {@code boolean} indicating if the address has is a multicast
+ * address of global scope, false if it is not of global scope or
+ * it is not a multicast address
+ */
+ @Override
+ public boolean isMCGlobal() {
+ return holder6.isMCGlobal();
+ }
+
+ /**
+ * Utility routine to check if the multicast address has node scope.
+ *
+ * @return a {@code boolean} indicating if the address has is a multicast
+ * address of node-local scope, false if it is not of node-local
+ * scope or it is not a multicast address
+ */
+ @Override
+ public boolean isMCNodeLocal() {
+ return holder6.isMCNodeLocal();
+ }
+
+ /**
+ * Utility routine to check if the multicast address has link scope.
+ *
+ * @return a {@code boolean} indicating if the address has is a multicast
+ * address of link-local scope, false if it is not of link-local
+ * scope or it is not a multicast address
+ */
+ @Override
+ public boolean isMCLinkLocal() {
+ return holder6.isMCLinkLocal();
+ }
+
+ /**
+ * Utility routine to check if the multicast address has site scope.
+ *
+ * @return a {@code boolean} indicating if the address has is a multicast
+ * address of site-local scope, false if it is not of site-local
+ * scope or it is not a multicast address
+ */
+ @Override
+ public boolean isMCSiteLocal() {
+ return holder6.isMCSiteLocal();
+ }
+
+ /**
+ * Utility routine to check if the multicast address has organization scope.
+ *
+ * @return a {@code boolean} indicating if the address has is a multicast
+ * address of organization-local scope, false if it is not of
+ * organization-local scope or it is not a multicast address
+ */
+ @Override
+ public boolean isMCOrgLocal() {
+ return holder6.isMCOrgLocal();
+ }
+ /**
+ * Returns the raw IP address of this {@code InetAddress} object. The result
+ * is in network byte order: the highest order byte of the address is in
+ * {@code getAddress()[0]}.
+ *
+ * @return the raw IP address of this object.
+ */
+ @Override
+ public byte[] getAddress() {
+ return holder6.ipaddress.clone();
+ }
+
+ /**
+ * Returns the numeric scopeId, if this instance is associated with
+ * an interface. If no scoped_id is set, the returned value is zero.
+ *
+ * @return the scopeId, or zero if not set.
+ *
+ * @since 1.5
+ */
+ public int getScopeId() {
+ return holder6.scope_id;
+ }
+
+ /**
+ * Returns the scoped interface, if this instance was created with
+ * with a scoped interface.
+ *
+ * @return the scoped interface, or null if not set.
+ * @since 1.5
+ */
+ public NetworkInterface getScopedInterface() {
+ return holder6.scope_ifname;
+ }
+
+ /**
+ * Returns the IP address string in textual presentation. If the instance
+ * was created specifying a scope identifier then the scope id is appended
+ * to the IP address preceded by a "%" (per-cent) character. This can be
+ * either a numeric value or a string, depending on which was used to create
+ * the instance.
+ *
+ * @return the raw IP address in a string format.
+ */
+ @Override
+ public String getHostAddress() {
+ return holder6.getHostAddress();
+ }
+
+ /**
+ * Returns a hashcode for this IP address.
+ *
+ * @return a hash code value for this IP address.
+ */
+ @Override
+ public int hashCode() {
+ return holder6.hashCode();
+ }
+
+ /**
+ * Compares this object against the specified object. The result is {@code
+ * true} if and only if the argument is not {@code null} and it represents
+ * the same IP address as this object.
+ *
+ * <p> Two instances of {@code InetAddress} represent the same IP address
+ * if the length of the byte arrays returned by {@code getAddress} is the
+ * same for both, and each of the array components is the same for the byte
+ * arrays.
+ *
+ * @param obj the object to compare against.
+ *
+ * @return {@code true} if the objects are the same; {@code false} otherwise.
+ *
+ * @see java.net.InetAddress#getAddress()
+ */
+ @Override
+ public boolean equals(Object obj) {
+ if (obj == null || !(obj instanceof Inet6Address))
+ return false;
+
+ Inet6Address inetAddr = (Inet6Address)obj;
+
+ return holder6.equals(inetAddr.holder6);
+ }
+
+ /**
+ * Utility routine to check if the InetAddress is an
+ * IPv4 compatible IPv6 address.
+ *
+ * @return a {@code boolean} indicating if the InetAddress is an IPv4
+ * compatible IPv6 address; or false if address is IPv4 address.
+ */
+ public boolean isIPv4CompatibleAddress() {
+ return holder6.isIPv4CompatibleAddress();
+ }
+
+ // Utilities
+
+ private static final int INT16SZ = 2;
+
+ /**
+ * Convert IPv6 binary address into presentation (printable) format.
+ *
+ * @param src a byte array representing the IPv6 numeric address
+ * @return a String representing an IPv6 address in
+ * textual representation format
+ */
+ static String numericToTextFormat(byte[] src) {
+ StringBuilder sb = new StringBuilder(39);
+ for (int i = 0; i < (INADDRSZ / INT16SZ); i++) {
+ sb.append(Integer.toHexString(((src[i<<1]<<8) & 0xff00)
+ | (src[(i<<1)+1] & 0xff)));
+ if (i < (INADDRSZ / INT16SZ) -1 ) {
+ sb.append(":");
+ }
+ }
+ return sb.toString();
+ }
+
+ /**
+ * Perform class load-time initializations.
+ */
+ private static native void init();
+}