1 /*
2 * Copyright (c) 2000, 2019, 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
39 * It is used to identify the local interface on which a multicast group
40 * is joined.
41 *
42 * Interfaces are normally known by names such as "le0".
43 *
44 * @since 1.4
45 */
46 public final class NetworkInterface {
47 private String name;
48 private String displayName;
49 private int index;
50 private InetAddress addrs[];
51 private InterfaceAddress bindings[];
52 private NetworkInterface childs[];
53 private NetworkInterface parent = null;
54 private boolean virtual = false;
55 private static final NetworkInterface defaultInterface;
56 private static final int defaultIndex; /* index of defaultInterface */
57
58 static {
59 jdk.internal.loader.BootLoader.loadLibrary("net");
60
61 init();
62 defaultInterface = DefaultInterface.getDefault();
63 if (defaultInterface != null) {
64 defaultIndex = defaultInterface.getIndex();
65 } else {
66 defaultIndex = 0;
67 }
68 }
69
70 /**
71 * Returns an NetworkInterface object with index set to 0 and name to null.
72 * Setting such an interface on a MulticastSocket will cause the
73 * kernel to choose one interface for sending multicast packets.
74 *
75 */
76 NetworkInterface() {
77 }
78
79 NetworkInterface(String name, int index, InetAddress[] addrs) {
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1 /*
2 * Copyright (c) 2000, 2020, 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
39 * It is used to identify the local interface on which a multicast group
40 * is joined.
41 *
42 * Interfaces are normally known by names such as "le0".
43 *
44 * @since 1.4
45 */
46 public final class NetworkInterface {
47 private String name;
48 private String displayName;
49 private int index;
50 private InetAddress addrs[];
51 private InterfaceAddress bindings[];
52 private NetworkInterface childs[];
53 private NetworkInterface parent = null;
54 private boolean virtual = false;
55 private static final NetworkInterface defaultInterface;
56 private static final int defaultIndex; /* index of defaultInterface */
57
58 static {
59 sun.security.action.LoadLibraryAction.privilegedLoadLibrary("net");
60
61 init();
62 defaultInterface = DefaultInterface.getDefault();
63 if (defaultInterface != null) {
64 defaultIndex = defaultInterface.getIndex();
65 } else {
66 defaultIndex = 0;
67 }
68 }
69
70 /**
71 * Returns an NetworkInterface object with index set to 0 and name to null.
72 * Setting such an interface on a MulticastSocket will cause the
73 * kernel to choose one interface for sending multicast packets.
74 *
75 */
76 NetworkInterface() {
77 }
78
79 NetworkInterface(String name, int index, InetAddress[] addrs) {
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