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952 lines
32 KiB
952 lines
32 KiB
/*
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* Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package java.net;
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import java.io.IOException;
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import java.io.InvalidObjectException;
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import java.io.ObjectInputStream;
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import java.io.ObjectOutputStream;
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import java.io.ObjectStreamField;
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import java.util.Enumeration;
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import java.util.Arrays;
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/**
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* This class represents an Internet Protocol version 6 (IPv6) address.
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* Defined by <a href="http://www.ietf.org/rfc/rfc2373.txt">
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* <i>RFC 2373: IP Version 6 Addressing Architecture</i></a>.
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*
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* <h3> <A NAME="format">Textual representation of IP addresses</a> </h3>
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*
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* Textual representation of IPv6 address used as input to methods
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* takes one of the following forms:
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*
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* <ol>
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* <li><p> <A NAME="lform">The preferred form</a> is x:x:x:x:x:x:x:x,
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* where the 'x's are
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* the hexadecimal values of the eight 16-bit pieces of the
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* address. This is the full form. For example,
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*
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* <blockquote><table cellpadding=0 cellspacing=0 summary="layout">
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* <tr><td>{@code 1080:0:0:0:8:800:200C:417A}<td></tr>
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* </table></blockquote>
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*
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* <p> Note that it is not necessary to write the leading zeros in
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* an individual field. However, there must be at least one numeral
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* in every field, except as described below.</li>
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*
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* <li><p> Due to some methods of allocating certain styles of IPv6
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* addresses, it will be common for addresses to contain long
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* strings of zero bits. In order to make writing addresses
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* containing zero bits easier, a special syntax is available to
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* compress the zeros. The use of "::" indicates multiple groups
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* of 16-bits of zeros. The "::" can only appear once in an address.
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* The "::" can also be used to compress the leading and/or trailing
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* zeros in an address. For example,
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*
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* <blockquote><table cellpadding=0 cellspacing=0 summary="layout">
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* <tr><td>{@code 1080::8:800:200C:417A}<td></tr>
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* </table></blockquote>
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*
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* <li><p> An alternative form that is sometimes more convenient
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* when dealing with a mixed environment of IPv4 and IPv6 nodes is
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* x:x:x:x:x:x:d.d.d.d, where the 'x's are the hexadecimal values
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* of the six high-order 16-bit pieces of the address, and the 'd's
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* are the decimal values of the four low-order 8-bit pieces of the
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* standard IPv4 representation address, for example,
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*
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* <blockquote><table cellpadding=0 cellspacing=0 summary="layout">
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* <tr><td>{@code ::FFFF:129.144.52.38}<td></tr>
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* <tr><td>{@code ::129.144.52.38}<td></tr>
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* </table></blockquote>
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*
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* <p> where "::FFFF:d.d.d.d" and "::d.d.d.d" are, respectively, the
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* general forms of an IPv4-mapped IPv6 address and an
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* IPv4-compatible IPv6 address. Note that the IPv4 portion must be
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* in the "d.d.d.d" form. The following forms are invalid:
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*
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* <blockquote><table cellpadding=0 cellspacing=0 summary="layout">
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* <tr><td>{@code ::FFFF:d.d.d}<td></tr>
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* <tr><td>{@code ::FFFF:d.d}<td></tr>
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* <tr><td>{@code ::d.d.d}<td></tr>
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* <tr><td>{@code ::d.d}<td></tr>
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* </table></blockquote>
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*
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* <p> The following form:
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*
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* <blockquote><table cellpadding=0 cellspacing=0 summary="layout">
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* <tr><td>{@code ::FFFF:d}<td></tr>
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* </table></blockquote>
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*
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* <p> is valid, however it is an unconventional representation of
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* the IPv4-compatible IPv6 address,
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*
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* <blockquote><table cellpadding=0 cellspacing=0 summary="layout">
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* <tr><td>{@code ::255.255.0.d}<td></tr>
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* </table></blockquote>
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*
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* <p> while "::d" corresponds to the general IPv6 address
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* "0:0:0:0:0:0:0:d".</li>
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* </ol>
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*
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* <p> For methods that return a textual representation as output
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* value, the full form is used. Inet6Address will return the full
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* form because it is unambiguous when used in combination with other
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* textual data.
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*
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* <h4> Special IPv6 address </h4>
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*
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* <blockquote>
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* <table cellspacing=2 summary="Description of IPv4-mapped address">
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* <tr><th valign=top><i>IPv4-mapped address</i></th>
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* <td>Of the form::ffff:w.x.y.z, this IPv6 address is used to
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* represent an IPv4 address. It allows the native program to
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* use the same address data structure and also the same
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* socket when communicating with both IPv4 and IPv6 nodes.
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*
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* <p>In InetAddress and Inet6Address, it is used for internal
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* representation; it has no functional role. Java will never
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* return an IPv4-mapped address. These classes can take an
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* IPv4-mapped address as input, both in byte array and text
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* representation. However, it will be converted into an IPv4
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* address.</td></tr>
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* </table></blockquote>
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*
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* <h4><A NAME="scoped">Textual representation of IPv6 scoped addresses</a></h4>
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*
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* <p> The textual representation of IPv6 addresses as described above can be
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* extended to specify IPv6 scoped addresses. This extension to the basic
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* addressing architecture is described in [draft-ietf-ipngwg-scoping-arch-04.txt].
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*
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* <p> Because link-local and site-local addresses are non-global, it is possible
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* that different hosts may have the same destination address and may be
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* reachable through different interfaces on the same originating system. In
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* this case, the originating system is said to be connected to multiple zones
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* of the same scope. In order to disambiguate which is the intended destination
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* zone, it is possible to append a zone identifier (or <i>scope_id</i>) to an
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* IPv6 address.
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*
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* <p> The general format for specifying the <i>scope_id</i> is the following:
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*
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* <blockquote><i>IPv6-address</i>%<i>scope_id</i></blockquote>
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* <p> The IPv6-address is a literal IPv6 address as described above.
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* The <i>scope_id</i> refers to an interface on the local system, and it can be
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* specified in two ways.
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* <ol><li><i>As a numeric identifier.</i> This must be a positive integer
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* that identifies the particular interface and scope as understood by the
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* system. Usually, the numeric values can be determined through administration
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* tools on the system. Each interface may have multiple values, one for each
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* scope. If the scope is unspecified, then the default value used is zero.</li>
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* <li><i>As a string.</i> This must be the exact string that is returned by
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* {@link java.net.NetworkInterface#getName()} for the particular interface in
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* question. When an Inet6Address is created in this way, the numeric scope-id
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* is determined at the time the object is created by querying the relevant
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* NetworkInterface.</li></ol>
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*
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* <p> Note also, that the numeric <i>scope_id</i> can be retrieved from
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* Inet6Address instances returned from the NetworkInterface class. This can be
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* used to find out the current scope ids configured on the system.
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* @since 1.4
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*/
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public final
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class Inet6Address extends InetAddress {
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final static int INADDRSZ = 16;
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/*
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* cached scope_id - for link-local address use only.
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*/
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private transient int cached_scope_id; // 0
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private class Inet6AddressHolder {
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private Inet6AddressHolder() {
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ipaddress = new byte[INADDRSZ];
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}
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private Inet6AddressHolder(
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byte[] ipaddress, int scope_id, boolean scope_id_set,
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NetworkInterface ifname, boolean scope_ifname_set)
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{
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this.ipaddress = ipaddress;
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this.scope_id = scope_id;
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this.scope_id_set = scope_id_set;
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this.scope_ifname_set = scope_ifname_set;
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this.scope_ifname = ifname;
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}
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/**
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* Holds a 128-bit (16 bytes) IPv6 address.
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*/
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byte[] ipaddress;
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/**
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* scope_id. The scope specified when the object is created. If the object
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* is created with an interface name, then the scope_id is not determined
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* until the time it is needed.
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*/
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int scope_id; // 0
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/**
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* This will be set to true when the scope_id field contains a valid
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* integer scope_id.
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*/
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boolean scope_id_set; // false
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/**
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* scoped interface. scope_id is derived from this as the scope_id of the first
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* address whose scope is the same as this address for the named interface.
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*/
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NetworkInterface scope_ifname; // null
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/**
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* set if the object is constructed with a scoped
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* interface instead of a numeric scope id.
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*/
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boolean scope_ifname_set; // false;
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void setAddr(byte addr[]) {
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if (addr.length == INADDRSZ) { // normal IPv6 address
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System.arraycopy(addr, 0, ipaddress, 0, INADDRSZ);
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}
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}
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void init(byte addr[], int scope_id) {
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setAddr(addr);
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if (scope_id >= 0) {
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this.scope_id = scope_id;
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this.scope_id_set = true;
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}
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}
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void init(byte addr[], NetworkInterface nif)
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throws UnknownHostException
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{
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setAddr(addr);
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if (nif != null) {
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this.scope_id = deriveNumericScope(ipaddress, nif);
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this.scope_id_set = true;
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this.scope_ifname = nif;
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this.scope_ifname_set = true;
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}
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}
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String getHostAddress() {
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String s = numericToTextFormat(ipaddress);
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if (scope_ifname != null) { /* must check this first */
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s = s + "%" + scope_ifname.getName();
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} else if (scope_id_set) {
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s = s + "%" + scope_id;
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}
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return s;
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}
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public boolean equals(Object o) {
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if (! (o instanceof Inet6AddressHolder)) {
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return false;
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}
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Inet6AddressHolder that = (Inet6AddressHolder)o;
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return Arrays.equals(this.ipaddress, that.ipaddress);
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}
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public int hashCode() {
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if (ipaddress != null) {
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int hash = 0;
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int i=0;
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while (i<INADDRSZ) {
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int j=0;
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int component=0;
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while (j<4 && i<INADDRSZ) {
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component = (component << 8) + ipaddress[i];
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j++;
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i++;
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}
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hash += component;
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}
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return hash;
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} else {
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return 0;
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}
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}
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boolean isIPv4CompatibleAddress() {
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if ((ipaddress[0] == 0x00) && (ipaddress[1] == 0x00) &&
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(ipaddress[2] == 0x00) && (ipaddress[3] == 0x00) &&
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(ipaddress[4] == 0x00) && (ipaddress[5] == 0x00) &&
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(ipaddress[6] == 0x00) && (ipaddress[7] == 0x00) &&
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(ipaddress[8] == 0x00) && (ipaddress[9] == 0x00) &&
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(ipaddress[10] == 0x00) && (ipaddress[11] == 0x00)) {
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return true;
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}
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return false;
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}
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boolean isMulticastAddress() {
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return ((ipaddress[0] & 0xff) == 0xff);
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}
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boolean isAnyLocalAddress() {
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byte test = 0x00;
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for (int i = 0; i < INADDRSZ; i++) {
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test |= ipaddress[i];
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}
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return (test == 0x00);
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}
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boolean isLoopbackAddress() {
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byte test = 0x00;
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for (int i = 0; i < 15; i++) {
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test |= ipaddress[i];
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}
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return (test == 0x00) && (ipaddress[15] == 0x01);
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}
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boolean isLinkLocalAddress() {
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return ((ipaddress[0] & 0xff) == 0xfe
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&& (ipaddress[1] & 0xc0) == 0x80);
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}
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boolean isSiteLocalAddress() {
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return ((ipaddress[0] & 0xff) == 0xfe
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&& (ipaddress[1] & 0xc0) == 0xc0);
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}
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boolean isMCGlobal() {
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return ((ipaddress[0] & 0xff) == 0xff
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&& (ipaddress[1] & 0x0f) == 0x0e);
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}
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boolean isMCNodeLocal() {
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return ((ipaddress[0] & 0xff) == 0xff
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&& (ipaddress[1] & 0x0f) == 0x01);
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}
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boolean isMCLinkLocal() {
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return ((ipaddress[0] & 0xff) == 0xff
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&& (ipaddress[1] & 0x0f) == 0x02);
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}
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boolean isMCSiteLocal() {
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return ((ipaddress[0] & 0xff) == 0xff
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&& (ipaddress[1] & 0x0f) == 0x05);
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}
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boolean isMCOrgLocal() {
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return ((ipaddress[0] & 0xff) == 0xff
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&& (ipaddress[1] & 0x0f) == 0x08);
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}
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}
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private final transient Inet6AddressHolder holder6;
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private static final long serialVersionUID = 6880410070516793377L;
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// Perform native initialization
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static { init(); }
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Inet6Address() {
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super();
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holder.init(null, IPv6);
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holder6 = new Inet6AddressHolder();
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}
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/* checking of value for scope_id should be done by caller
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* scope_id must be >= 0, or -1 to indicate not being set
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*/
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Inet6Address(String hostName, byte addr[], int scope_id) {
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holder.init(hostName, IPv6);
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holder6 = new Inet6AddressHolder();
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holder6.init(addr, scope_id);
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}
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Inet6Address(String hostName, byte addr[]) {
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holder6 = new Inet6AddressHolder();
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try {
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initif (hostName, addr, null);
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} catch (UnknownHostException e) {} /* cant happen if ifname is null */
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}
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Inet6Address (String hostName, byte addr[], NetworkInterface nif)
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throws UnknownHostException
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{
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holder6 = new Inet6AddressHolder();
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initif (hostName, addr, nif);
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}
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Inet6Address (String hostName, byte addr[], String ifname)
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throws UnknownHostException
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{
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holder6 = new Inet6AddressHolder();
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initstr (hostName, addr, ifname);
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}
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/**
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* Create an Inet6Address in the exact manner of {@link
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* InetAddress#getByAddress(String,byte[])} except that the IPv6 scope_id is
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* set to the value corresponding to the given interface for the address
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* type specified in {@code addr}. The call will fail with an
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* UnknownHostException if the given interface does not have a numeric
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* scope_id assigned for the given address type (eg. link-local or site-local).
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* See <a href="Inet6Address.html#scoped">here</a> for a description of IPv6
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* scoped addresses.
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*
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* @param host the specified host
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* @param addr the raw IP address in network byte order
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* @param nif an interface this address must be associated with.
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* @return an Inet6Address object created from the raw IP address.
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* @throws UnknownHostException
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* if IP address is of illegal length, or if the interface does not
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* have a numeric scope_id assigned for the given address type.
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*
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* @since 1.5
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*/
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public static Inet6Address getByAddress(String host, byte[] addr,
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NetworkInterface nif)
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throws UnknownHostException
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{
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if (host != null && host.length() > 0 && host.charAt(0) == '[') {
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if (host.charAt(host.length()-1) == ']') {
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host = host.substring(1, host.length() -1);
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}
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}
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if (addr != null) {
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if (addr.length == Inet6Address.INADDRSZ) {
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return new Inet6Address(host, addr, nif);
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}
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}
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throw new UnknownHostException("addr is of illegal length");
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}
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/**
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* Create an Inet6Address in the exact manner of {@link
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* InetAddress#getByAddress(String,byte[])} except that the IPv6 scope_id is
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* set to the given numeric value. The scope_id is not checked to determine
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* if it corresponds to any interface on the system.
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* See <a href="Inet6Address.html#scoped">here</a> for a description of IPv6
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* scoped addresses.
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*
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* @param host the specified host
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* @param addr the raw IP address in network byte order
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* @param scope_id the numeric scope_id for the address.
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* @return an Inet6Address object created from the raw IP address.
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* @throws UnknownHostException if IP address is of illegal length.
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*
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* @since 1.5
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*/
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public static Inet6Address getByAddress(String host, byte[] addr,
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int scope_id)
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throws UnknownHostException
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{
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if (host != null && host.length() > 0 && host.charAt(0) == '[') {
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if (host.charAt(host.length()-1) == ']') {
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host = host.substring(1, host.length() -1);
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}
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}
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if (addr != null) {
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if (addr.length == Inet6Address.INADDRSZ) {
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return new Inet6Address(host, addr, scope_id);
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}
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}
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throw new UnknownHostException("addr is of illegal length");
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}
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private void initstr(String hostName, byte addr[], String ifname)
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throws UnknownHostException
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{
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try {
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NetworkInterface nif = NetworkInterface.getByName (ifname);
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if (nif == null) {
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throw new UnknownHostException ("no such interface " + ifname);
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}
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initif (hostName, addr, nif);
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} catch (SocketException e) {
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throw new UnknownHostException ("SocketException thrown" + ifname);
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}
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}
|
|
|
|
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 long FIELDS_OFFSET;
|
|
private static final sun.misc.Unsafe UNSAFE;
|
|
|
|
static {
|
|
try {
|
|
sun.misc.Unsafe unsafe = sun.misc.Unsafe.getUnsafe();
|
|
FIELDS_OFFSET = unsafe.objectFieldOffset(
|
|
Inet6Address.class.getDeclaredField("holder6"));
|
|
UNSAFE = unsafe;
|
|
} catch (ReflectiveOperationException e) {
|
|
throw new Error(e);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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 = (int)gf.get("scope_id", -1);
|
|
boolean scope_id_set = (boolean)gf.get("scope_id_set", false);
|
|
boolean scope_ifname_set = (boolean)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
|
|
*
|
|
* @since JDK1.1
|
|
*/
|
|
@Override
|
|
public boolean isMulticastAddress() {
|
|
return holder6.isMulticastAddress();
|
|
}
|
|
|
|
/**
|
|
* Utility routine to check if the InetAddress in a wildcard address.
|
|
*
|
|
* @return a {@code boolean} indicating if the Inetaddress is
|
|
* a wildcard address.
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
@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.
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
@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.
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
@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.
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
@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
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
@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
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
@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
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
@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
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
@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
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
@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.
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
public boolean isIPv4CompatibleAddress() {
|
|
return holder6.isIPv4CompatibleAddress();
|
|
}
|
|
|
|
// Utilities
|
|
private final static 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
|
|
* @since 1.4
|
|
*/
|
|
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();
|
|
}
|