GNU Classpath (0.20) | |
Frames | No Frames |
1: /* Inet4Address.java -- 2: Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: 39: package java.net; 40: 41: import java.io.ObjectStreamException; 42: 43: /* 44: * Written using on-line Java Platform 1.4 API Specification and 45: * RFC 1884 (http://www.ietf.org/rfc/rfc1884.txt), 46: * RFC 1918 (http://www.ietf.org/rfc/rfc1918.txt), 47: * RFC 2365 (http://www.ietf.org/rfc/rfc2365.txt) 48: * 49: * @author Michael Koch 50: * @status Believed complete and correct. 51: */ 52: public final class Inet4Address extends InetAddress 53: { 54: /** 55: * For compatability with Sun's JDK 1.4.2 rev. 5 56: */ 57: static final long serialVersionUID = 3286316764910316507L; 58: 59: /** 60: * needed for serialization 61: */ 62: private Object writeReplace() throws ObjectStreamException 63: { 64: return new InetAddress(addr, hostName); 65: } 66: 67: /** 68: * Initializes this object's addr instance variable from the passed in 69: * byte array. Note that this constructor is protected and is called 70: * only by static methods in this class. 71: * 72: * @param addr The IP number of this address as an array of bytes 73: * @param host The hostname of this IP address. 74: */ 75: Inet4Address(byte[] addr, String host) 76: { 77: super(addr, host); 78: } 79: 80: /** 81: * Checks if the address is a multicast address 82: * 83: * @since 1.1 84: */ 85: public boolean isMulticastAddress() 86: { 87: return super.isMulticastAddress(); 88: } 89: 90: /** 91: * Checks if this address is a loopback address 92: */ 93: public boolean isLoopbackAddress() 94: { 95: return super.isLoopbackAddress(); 96: } 97: 98: /** 99: * Checks if this address is a wildcard address 100: * 101: * @since 1.4 102: */ 103: public boolean isAnyLocalAddress() 104: { 105: return super.isAnyLocalAddress(); 106: } 107: 108: /** 109: * Checks if this address is a link local address 110: * 111: * @since 1.4 112: */ 113: public boolean isLinkLocalAddress() 114: { 115: return super.isLinkLocalAddress(); 116: } 117: 118: /** 119: * Checks if this address is a site local address 120: * 121: * @since 1.4 122: */ 123: public boolean isSiteLocalAddress() 124: { 125: return super.isSiteLocalAddress(); 126: } 127: 128: /** 129: * Checks if this multicast address has global scope 130: * 131: * @since 1.4 132: */ 133: public boolean isMCGlobal() 134: { 135: return super.isMCGlobal(); 136: } 137: 138: /** 139: * Checks if this multicast address has node scope 140: * 141: * @since 1.4 142: */ 143: public boolean isMCNodeLocal() 144: { 145: return super.isMCNodeLocal(); 146: } 147: 148: /** 149: * Checks if this multicast address has link scope 150: * 151: * @since 1.4 152: */ 153: public boolean isMCLinkLocal() 154: { 155: return super.isMCLinkLocal(); 156: } 157: 158: /** 159: * Checks if this multicast address has site scope 160: * 161: * @since 1.4 162: */ 163: public boolean isMCSiteLocal() 164: { 165: return super.isMCSiteLocal(); 166: } 167: 168: /** 169: * Checks if this multicast address has organization scope 170: * 171: * @since 1.4 172: */ 173: public boolean isMCOrgLocal() 174: { 175: return super.isMCOrgLocal(); 176: } 177: 178: /** 179: * Returns the address of the current instance 180: */ 181: public byte[] getAddress() 182: { 183: return (byte[]) addr.clone(); 184: } 185: 186: /** 187: * Returns the address as string 188: * 189: * @since 1.0.2 190: */ 191: public String getHostAddress() 192: { 193: return super.getHostAddress(); 194: } 195: 196: /** 197: * Computes the hashcode of the instance 198: */ 199: public int hashCode() 200: { 201: int hash = 0; 202: int len = addr.length; 203: int i = len > 4 ? len - 4 : 0; 204: 205: for (; i < len; i++) 206: hash = (hash << 8) | (addr[i] & 0xFF); 207: 208: return hash; 209: } 210: 211: /** 212: * Compare the current Inet4Address instance with obj 213: * 214: * @param obj Object to compare with 215: */ 216: public boolean equals(Object obj) 217: { 218: if (! (obj instanceof InetAddress)) 219: return false; 220: 221: byte[] addr1 = addr; 222: byte[] addr2 = ((InetAddress) obj).addr; 223: 224: if (addr1.length != addr2.length) 225: return false; 226: 227: for (int i = addr1.length; --i >= 0;) 228: if (addr1[i] != addr2[i]) 229: return false; 230: 231: return true; 232: } 233: }
GNU Classpath (0.20) |