1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 1997 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40 #include "lint.h"
41
42 #include <sys/types.h>
43
44 #include <netinet/in.h>
45
46 /*
47 * Return the local network address portion of an
48 * internet address; handles class a/b/c network
49 * number formats.
50 */
51 in_addr_t
inet_lnaof(struct in_addr in)52 inet_lnaof(struct in_addr in)
53 {
54 uint32_t i = ntohl(in.s_addr);
55
56 if (IN_CLASSA(i))
57 return ((i)&IN_CLASSA_HOST);
58 else if (IN_CLASSB(i))
59 return ((i)&IN_CLASSB_HOST);
60 else
61 return ((i)&IN_CLASSC_HOST);
62 }
63