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/*	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#pragma ident	"%Z%%M%	%I%	%E% SMI"
41
42#include <sys/types.h>
43#include <netinet/in.h>
44
45/*
46 * Formulate an Internet address from network + host.  Used in
47 * building addresses stored in the ifnet structure.
48 */
49struct in_addr
50inet_makeaddr(ipaddr_t net, ipaddr_t host)
51{
52	ipaddr_t addr;
53	struct in_addr inaddr;
54
55	if (net < 128)
56		addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST);
57	else if (net < 65536)
58		addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST);
59	else if (net < 16777216L)
60		addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
61	else
62		addr = net | host;
63	addr = htonl(addr);
64	inaddr.s_addr = addr;
65	return (inaddr);
66}
67