| /* |
| * 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(); |
| } |