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| 1 | +/* | |
| 2 | + * Copyright (c) 2005, 2008, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package java.net; | |
| 27 | + | |
| 28 | +/** | |
| 29 | + * This class represents a Network Interface address. In short it's an | |
| 30 | + * IP address, a subnet mask and a broadcast address when the address is | |
| 31 | + * an IPv4 one. An IP address and a network prefix length in the case | |
| 32 | + * of IPv6 address. | |
| 33 | + * | |
| 34 | + * @see java.net.NetworkInterface | |
| 35 | + * @since 1.6 | |
| 36 | + */ | |
| 37 | +public class InterfaceAddress { | |
| 38 | + private InetAddress address = null; | |
| 39 | + private Inet4Address broadcast = null; | |
| 40 | + private short maskLength = 0; | |
| 41 | + | |
| 42 | + /* | |
| 43 | + * Package private constructor. Can't be built directly, instances are | |
| 44 | + * obtained through the NetworkInterface class. | |
| 45 | + */ | |
| 46 | + InterfaceAddress() { | |
| 47 | + } | |
| 48 | + | |
| 49 | + /** | |
| 50 | + * Returns an <code>InetAddress</code> for this address. | |
| 51 | + * | |
| 52 | + * @return the <code>InetAddress</code> for this address. | |
| 53 | + */ | |
| 54 | + public InetAddress getAddress() { | |
| 55 | + return address; | |
| 56 | + } | |
| 57 | + | |
| 58 | + /** | |
| 59 | + * Returns an <code>InetAddress</code> for the brodcast address | |
| 60 | + * for this InterfaceAddress. | |
| 61 | + * <p> | |
| 62 | + * Only IPv4 networks have broadcast address therefore, in the case | |
| 63 | + * of an IPv6 network, <code>null</code> will be returned. | |
| 64 | + * | |
| 65 | + * @return the <code>InetAddress</code> representing the broadcast | |
| 66 | + * address or <code>null</code> if there is no broadcast address. | |
| 67 | + */ | |
| 68 | + public InetAddress getBroadcast() { | |
| 69 | + return broadcast; | |
| 70 | + } | |
| 71 | + | |
| 72 | + /** | |
| 73 | + * Returns the network prefix length for this address. This is also known | |
| 74 | + * as the subnet mask in the context of IPv4 addresses. | |
| 75 | + * Typical IPv4 values would be 8 (255.0.0.0), 16 (255.255.0.0) | |
| 76 | + * or 24 (255.255.255.0). <p> | |
| 77 | + * Typical IPv6 values would be 128 (::1/128) or 10 (fe80::203:baff:fe27:1243/10) | |
| 78 | + * | |
| 79 | + * @return a <code>short</code> representing the prefix length for the | |
| 80 | + * subnet of that address. | |
| 81 | + */ | |
| 82 | + public short getNetworkPrefixLength() { | |
| 83 | + return maskLength; | |
| 84 | + } | |
| 85 | + | |
| 86 | + /** | |
| 87 | + * Compares this object against the specified object. | |
| 88 | + * The result is <code>true</code> if and only if the argument is | |
| 89 | + * not <code>null</code> and it represents the same interface address as | |
| 90 | + * this object. | |
| 91 | + * <p> | |
| 92 | + * Two instances of <code>InterfaceAddress</code> represent the same | |
| 93 | + * address if the InetAddress, the prefix length and the broadcast are | |
| 94 | + * the same for both. | |
| 95 | + * | |
| 96 | + * @param obj the object to compare against. | |
| 97 | + * @return <code>true</code> if the objects are the same; | |
| 98 | + * <code>false</code> otherwise. | |
| 99 | + * @see java.net.InterfaceAddress#hashCode() | |
| 100 | + */ | |
| 101 | + public boolean equals(Object obj) { | |
| 102 | + if (!(obj instanceof InterfaceAddress)) { | |
| 103 | + return false; | |
| 104 | + } | |
| 105 | + InterfaceAddress cmp = (InterfaceAddress) obj; | |
| 106 | + if ( !(address == null ? cmp.address == null : address.equals(cmp.address)) ) | |
| 107 | + return false; | |
| 108 | + if ( !(broadcast == null ? cmp.broadcast == null : broadcast.equals(cmp.broadcast)) ) | |
| 109 | + return false; | |
| 110 | + if (maskLength != cmp.maskLength) | |
| 111 | + return false; | |
| 112 | + return true; | |
| 113 | + } | |
| 114 | + | |
| 115 | + /** | |
| 116 | + * Returns a hashcode for this Interface address. | |
| 117 | + * | |
| 118 | + * @return a hash code value for this Interface address. | |
| 119 | + */ | |
| 120 | + public int hashCode() { | |
| 121 | + return address.hashCode() + ((broadcast != null) ? broadcast.hashCode() : 0) + maskLength; | |
| 122 | + } | |
| 123 | + | |
| 124 | + /** | |
| 125 | + * Converts this Interface address to a <code>String</code>. The | |
| 126 | + * string returned is of the form: InetAddress / prefix length [ broadcast address ]. | |
| 127 | + * | |
| 128 | + * @return a string representation of this Interface address. | |
| 129 | + */ | |
| 130 | + public String toString() { | |
| 131 | + return address + "/" + maskLength + " [" + broadcast + "]"; | |
| 132 | + } | |
| 133 | + | |
| 134 | +} | |