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 2001 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /*
28 * University Copyright- Copyright (c) 1982, 1986, 1988
29 * The Regents of the University of California
30 * All Rights Reserved
31 *
32 * University Acknowledgment- Portions of this document are derived from
33 * software developed by the University of California, Berkeley, and its
34 * contributors.
35 */
36
37 #pragma ident "%Z%%M% %I% %E% SMI"
38 /* from UCB 4.4 85/06/02 */
39
40 #include <sys/types.h>
41 #include <netinet/in.h>
42
43 /*
44 * Formulate an Internet address from network + host. Used in
45 * building addresses stored in the ifnet structure.
46 */
47 struct in_addr
inet_makeaddr(net,host)48 inet_makeaddr(net, host)
49 int net, host;
50 {
51 ulong_t addr;
52 struct in_addr inaddr;
53
54 if (net < 128)
55 addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST);
56 else if (net < 65536)
57 addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST);
58 else
59 addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
60 inaddr.s_addr = htonl(addr);
61 return (inaddr);
62 }
63