--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/net/Inet4Address.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,374 @@
+/*
+ * Copyright 2000-2006 Sun Microsystems, Inc. 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. Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package java.net;
+
+import java.security.AccessController;
+import java.io.ObjectStreamException;
+import sun.security.action.*;
+
+/**
+ * This class represents an Internet Protocol version 4 (IPv4) address.
+ * Defined by <a href="http://www.ietf.org/rfc/rfc790.txt">
+ * <i>RFC 790: Assigned Numbers</i></a>,
+ * <a href="http://www.ietf.org/rfc/rfc1918.txt">
+ * <i>RFC 1918: Address Allocation for Private Internets</i></a>,
+ * and <a href="http://www.ietf.org/rfc/rfc2365.txt"><i>RFC 2365:
+ * Administratively Scoped IP Multicast</i></a>
+ *
+ * <h4> <A NAME="format">Textual representation of IP addresses</a> </h4>
+ *
+ * Textual representation of IPv4 address used as input to methods
+ * takes one of the following forms:
+ *
+ * <blockquote><table cellpadding=0 cellspacing=0 summary="layout">
+ * <tr><td><tt>d.d.d.d</tt></td></tr>
+ * <tr><td><tt>d.d.d</tt></td></tr>
+ * <tr><td><tt>d.d</tt></td></tr>
+ * <tr><td><tt>d</tt></td></tr>
+ * </table></blockquote>
+ *
+ * <p> When four parts are specified, each is interpreted as a byte of
+ * data and assigned, from left to right, to the four bytes of an IPv4
+ * address.
+
+ * <p> When a three part address is specified, the last part is
+ * interpreted as a 16-bit quantity and placed in the right most two
+ * bytes of the network address. This makes the three part address
+ * format convenient for specifying Class B net- work addresses as
+ * 128.net.host.
+ *
+ * <p> When a two part address is supplied, the last part is
+ * interpreted as a 24-bit quantity and placed in the right most three
+ * bytes of the network address. This makes the two part address
+ * format convenient for specifying Class A network addresses as
+ * net.host.
+ *
+ * <p> When only one part is given, the value is stored directly in
+ * the network address without any byte rearrangement.
+ *
+ * <p> For methods that return a textual representation as output
+ * value, the first form, i.e. a dotted-quad string, is used.
+ *
+ * <h4> The Scope of a Multicast Address </h4>
+ *
+ * Historically the IPv4 TTL field in the IP header has doubled as a
+ * multicast scope field: a TTL of 0 means node-local, 1 means
+ * link-local, up through 32 means site-local, up through 64 means
+ * region-local, up through 128 means continent-local, and up through
+ * 255 are global. However, the administrative scoping is preferred.
+ * Please refer to <a href="http://www.ietf.org/rfc/rfc2365.txt">
+ * <i>RFC 2365: Administratively Scoped IP Multicast</i></a>
+ * @since 1.4
+ */
+
+public final
+class Inet4Address extends InetAddress {
+ final static int INADDRSZ = 4;
+
+ /** use serialVersionUID from InetAddress, but Inet4Address instance
+ * is always replaced by an InetAddress instance before being
+ * serialized */
+ private static final long serialVersionUID = 3286316764910316507L;
+
+ /*
+ * Perform initializations.
+ */
+ static {
+ init();
+ }
+
+ Inet4Address() {
+ super();
+ hostName = null;
+ address = 0;
+ family = IPv4;
+ }
+
+ Inet4Address(String hostName, byte addr[]) {
+ this.hostName = hostName;
+ this.family = IPv4;
+ if (addr != null) {
+ if (addr.length == INADDRSZ) {
+ address = addr[3] & 0xFF;
+ address |= ((addr[2] << 8) & 0xFF00);
+ address |= ((addr[1] << 16) & 0xFF0000);
+ address |= ((addr[0] << 24) & 0xFF000000);
+ }
+ }
+ }
+ Inet4Address(String hostName, int address) {
+ this.hostName = hostName;
+ this.family = IPv4;
+ this.address = address;
+ }
+
+ /**
+ * Replaces the object to be serialized with an InetAddress object.
+ *
+ * @return the alternate object to be serialized.
+ *
+ * @throws ObjectStreamException if a new object replacing this
+ * object could not be created
+ */
+ private Object writeReplace() throws ObjectStreamException {
+ // will replace the to be serialized 'this' object
+ InetAddress inet = new InetAddress();
+ inet.hostName = this.hostName;
+ inet.address = this.address;
+
+ /**
+ * Prior to 1.4 an InetAddress was created with a family
+ * based on the platform AF_INET value (usually 2).
+ * For compatibility reasons we must therefore write the
+ * the InetAddress with this family.
+ */
+ inet.family = 2;
+
+ return inet;
+ }
+
+ /**
+ * Utility routine to check if the InetAddress is an
+ * IP multicast address. IP multicast address is a Class D
+ * address i.e first four bits of the address are 1110.
+ * @return a <code>boolean</code> indicating if the InetAddress is
+ * an IP multicast address
+ * @since JDK1.1
+ */
+ public boolean isMulticastAddress() {
+ return ((address & 0xf0000000) == 0xe0000000);
+ }
+
+ /**
+ * Utility routine to check if the InetAddress in a wildcard address.
+ * @return a <code>boolean</code> indicating if the Inetaddress is
+ * a wildcard address.
+ * @since 1.4
+ */
+ public boolean isAnyLocalAddress() {
+ return address == 0;
+ }
+
+ /**
+ * Utility routine to check if the InetAddress is a loopback address.
+ *
+ * @return a <code>boolean</code> indicating if the InetAddress is
+ * a loopback address; or false otherwise.
+ * @since 1.4
+ */
+ private static final int loopback = 2130706433; /* 127.0.0.1 */
+ public boolean isLoopbackAddress() {
+ /* 127.x.x.x */
+ byte[] byteAddr = getAddress();
+ return byteAddr[0] == 127;
+ }
+
+ /**
+ * Utility routine to check if the InetAddress is an link local address.
+ *
+ * @return a <code>boolean</code> indicating if the InetAddress is
+ * a link local address; or false if address is not a link local unicast address.
+ * @since 1.4
+ */
+ public boolean isLinkLocalAddress() {
+ // link-local unicast in IPv4 (169.254.0.0/16)
+ // defined in "Documenting Special Use IPv4 Address Blocks
+ // that have been Registered with IANA" by Bill Manning
+ // draft-manning-dsua-06.txt
+ return (((address >>> 24) & 0xFF) == 169)
+ && (((address >>> 16) & 0xFF) == 254);
+ }
+
+ /**
+ * Utility routine to check if the InetAddress is a site local address.
+ *
+ * @return a <code>boolean</code> indicating if the InetAddress is
+ * a site local address; or false if address is not a site local unicast address.
+ * @since 1.4
+ */
+ public boolean isSiteLocalAddress() {
+ // refer to RFC 1918
+ // 10/8 prefix
+ // 172.16/12 prefix
+ // 192.168/16 prefix
+ return (((address >>> 24) & 0xFF) == 10)
+ || ((((address >>> 24) & 0xFF) == 172)
+ && (((address >>> 16) & 0xF0) == 16))
+ || ((((address >>> 24) & 0xFF) == 192)
+ && (((address >>> 16) & 0xFF) == 168));
+ }
+
+ /**
+ * Utility routine to check if the multicast address has global scope.
+ *
+ * @return a <code>boolean</code> 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
+ */
+ public boolean isMCGlobal() {
+ // 224.0.1.0 to 238.255.255.255
+ byte[] byteAddr = getAddress();
+ return ((byteAddr[0] & 0xff) >= 224 && (byteAddr[0] & 0xff) <= 238 ) &&
+ !((byteAddr[0] & 0xff) == 224 && byteAddr[1] == 0 &&
+ byteAddr[2] == 0);
+ }
+
+ /**
+ * Utility routine to check if the multicast address has node scope.
+ *
+ * @return a <code>boolean</code> 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
+ */
+ public boolean isMCNodeLocal() {
+ // unless ttl == 0
+ return false;
+ }
+
+ /**
+ * Utility routine to check if the multicast address has link scope.
+ *
+ * @return a <code>boolean</code> 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
+ */
+ public boolean isMCLinkLocal() {
+ // 224.0.0/24 prefix and ttl == 1
+ return (((address >>> 24) & 0xFF) == 224)
+ && (((address >>> 16) & 0xFF) == 0)
+ && (((address >>> 8) & 0xFF) == 0);
+ }
+
+ /**
+ * Utility routine to check if the multicast address has site scope.
+ *
+ * @return a <code>boolean</code> 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
+ */
+ public boolean isMCSiteLocal() {
+ // 239.255/16 prefix or ttl < 32
+ return (((address >>> 24) & 0xFF) == 239)
+ && (((address >>> 16) & 0xFF) == 255);
+ }
+
+ /**
+ * Utility routine to check if the multicast address has organization scope.
+ *
+ * @return a <code>boolean</code> 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
+ */
+ public boolean isMCOrgLocal() {
+ // 239.192 - 239.195
+ return (((address >>> 24) & 0xFF) == 239)
+ && (((address >>> 16) & 0xFF) >= 192)
+ && (((address >>> 16) & 0xFF) <= 195);
+ }
+
+ /**
+ * Returns the raw IP address of this <code>InetAddress</code>
+ * object. The result is in network byte order: the highest order
+ * byte of the address is in <code>getAddress()[0]</code>.
+ *
+ * @return the raw IP address of this object.
+ */
+ public byte[] getAddress() {
+ byte[] addr = new byte[INADDRSZ];
+
+ addr[0] = (byte) ((address >>> 24) & 0xFF);
+ addr[1] = (byte) ((address >>> 16) & 0xFF);
+ addr[2] = (byte) ((address >>> 8) & 0xFF);
+ addr[3] = (byte) (address & 0xFF);
+ return addr;
+ }
+
+ /**
+ * Returns the IP address string in textual presentation form.
+ *
+ * @return the raw IP address in a string format.
+ * @since JDK1.0.2
+ */
+ public String getHostAddress() {
+ return numericToTextFormat(getAddress());
+ }
+
+ /**
+ * Returns a hashcode for this IP address.
+ *
+ * @return a hash code value for this IP address.
+ */
+ public int hashCode() {
+ return address;
+ }
+
+ /**
+ * Compares this object against the specified object.
+ * The result is <code>true</code> if and only if the argument is
+ * not <code>null</code> and it represents the same IP address as
+ * this object.
+ * <p>
+ * Two instances of <code>InetAddress</code> represent the same IP
+ * address if the length of the byte arrays returned by
+ * <code>getAddress</code> 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</code> if the objects are the same;
+ * <code>false</code> otherwise.
+ * @see java.net.InetAddress#getAddress()
+ */
+ public boolean equals(Object obj) {
+ return (obj != null) && (obj instanceof Inet4Address) &&
+ (((InetAddress)obj).address == address);
+ }
+
+ // Utilities
+ /*
+ * Converts IPv4 binary address into a string suitable for presentation.
+ *
+ * @param src a byte array representing an IPv4 numeric address
+ * @return a String representing the IPv4 address in
+ * textual representation format
+ * @since 1.4
+ */
+
+ static String numericToTextFormat(byte[] src)
+ {
+ return (src[0] & 0xff) + "." + (src[1] & 0xff) + "." + (src[2] & 0xff) + "." + (src[3] & 0xff);
+ }
+
+ /**
+ * Perform class load-time initializations.
+ */
+ private static native void init();
+}