1 /*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #if defined(LIBC_SCCS) && !defined(lint)
35 static const char sccsid[] = "@(#)inet_makeaddr.c 8.1 (Berkeley) 6/4/93";
36 #endif /* LIBC_SCCS and not lint */
37
38 #include "port_before.h"
39
40 #include <sys/param.h>
41 #include <netinet/in.h>
42 #include <arpa/inet.h>
43
44 #include "port_after.h"
45
46 /*%
47 * Formulate an Internet address from network + host. Used in
48 * building addresses stored in the ifnet structure.
49 */
50 struct in_addr
inet_makeaddr(net,host)51 inet_makeaddr(net, host)
52 u_long net, host;
53 {
54 struct in_addr a;
55
56 if (net < 128U)
57 a.s_addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST);
58 else if (net < 65536U)
59 a.s_addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST);
60 else if (net < 16777216L)
61 a.s_addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
62 else
63 a.s_addr = net | host;
64 a.s_addr = htonl(a.s_addr);
65 return (a);
66 }
67
68 /*! \file */
69