source: rtems/c/src/exec/libnetworking/libc/inet_makeaddr.c @ 39e6e65a

4.104.114.84.95
Last change on this file since 39e6e65a was 39e6e65a, checked in by Joel Sherrill <joel.sherrill@…>, on 08/19/98 at 21:32:28

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  • Property mode set to 100644
File size: 2.5 KB
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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)
35static char sccsid[] = "@(#)inet_makeaddr.c     8.1 (Berkeley) 6/4/93";
36#endif /* LIBC_SCCS and not lint */
37
38#include <sys/param.h>
39#include <netinet/in.h>
40#include <arpa/inet.h>
41
42/*
43 * Formulate an Internet address from network + host.  Used in
44 * building addresses stored in the ifnet structure.
45 */
46struct in_addr
47inet_makeaddr(net, host)
48        u_long net, host;
49{
50        u_long addr;
51
52        if (net < 128)
53                addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST);
54        else if (net < 65536)
55                addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST);
56        else if (net < 16777216L)
57                addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
58        else
59                addr = net | host;
60        addr = htonl(addr);
61        return (*(struct in_addr *)&addr);
62}
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