1 /* VMNetworkInterface.java -- 2 Copyright (C) 2005, 2008 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 gnu.classpath.Configuration; 42 43 import java.nio.ByteBuffer; 44 import java.util.HashSet; 45 import java.util.Set; 46 47 /** 48 * This class models a network interface on the host computer. A network 49 * interface contains a name (typically associated with a specific 50 * hardware adapter) and a list of addresses that are bound to it. 51 * For example, an ethernet interface may be named "eth0" and have the 52 * address 192.168.1.101 assigned to it. 53 * 54 * @author Michael Koch (konqueror@gmx.de) 55 * @since 1.4 56 */ 57 final class VMNetworkInterface 58 { 59 String name; 60 Set addresses; 61 VMNetworkInterface(String name)62 VMNetworkInterface(String name) 63 { 64 this.name = name; 65 addresses = new HashSet(); 66 } 67 68 /** 69 * Creates a dummy instance which represents any network 70 * interface. 71 */ VMNetworkInterface()72 public VMNetworkInterface() 73 { 74 addresses = new HashSet(); 75 try 76 { 77 addresses.add(InetAddress.getByName("0.0.0.0")); 78 } 79 catch (UnknownHostException _) 80 { 81 // Cannot happen. 82 } 83 } 84 85 static 86 { 87 if (Configuration.INIT_LOAD_LIBRARY) 88 System.loadLibrary("javanet"); 89 initIds()90 initIds(); 91 } 92 initIds()93 private static native void initIds(); 94 95 /** 96 * Return a list of VM network interface objects. 97 * 98 * @return The list of network interfaces. 99 * @throws SocketException 100 */ getVMInterfaces()101 public static native VMNetworkInterface[] getVMInterfaces() 102 throws SocketException; 103 addAddress(ByteBuffer addr)104 private void addAddress(ByteBuffer addr) 105 throws SocketException, UnknownHostException 106 { 107 if (addr.remaining() == 4) 108 { 109 byte[] ipv4 = new byte[4]; 110 addr.get(ipv4); 111 addresses.add(Inet4Address.getByAddress(ipv4)); 112 } 113 else if (addr.remaining() == 16) 114 { 115 byte[] ipv6 = new byte[16]; 116 addr.get(ipv6); 117 addresses.add(Inet6Address.getByAddress(ipv6)); 118 } 119 else 120 throw new SocketException("invalid interface address"); 121 } 122 isUp(String name)123 static native boolean isUp(String name) throws SocketException; 124 isLoopback(String name)125 static native boolean isLoopback(String name) throws SocketException; 126 isPointToPoint(String name)127 static native boolean isPointToPoint(String name) throws SocketException; 128 supportsMulticast(String name)129 static native boolean supportsMulticast(String name) throws SocketException; 130 131 } 132