1 /** @File
2 Formulate an Internet address from network + host.
3
4 Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials are licensed and made available under
6 the terms and conditions of the BSD License that accompanies this distribution.
7 The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.
9
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12
13 * Copyright (c) 1983, 1993
14 * The Regents of the University of California. All rights reserved.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39
40 NetBSD: inet_makeaddr.c,v 1.1 2004/05/20 23:13:02 christos Exp
41 inet_makeaddr.c 8.1 (Berkeley) 6/4/93
42 **/
43 #include <LibConfig.h>
44
45 #include "namespace.h"
46 #include <sys/param.h>
47 #include <netinet/in.h>
48 #include <arpa/inet.h>
49
50 #ifdef __weak_alias
__weak_alias(inet_makeaddr,_inet_makeaddr)51 __weak_alias(inet_makeaddr,_inet_makeaddr)
52 #endif
53
54 /*
55 * Formulate an Internet address from network + host. Used in
56 * building addresses stored in the ifnet structure.
57 */
58 struct in_addr
59 inet_makeaddr(in_addr_t net, in_addr_t host)
60 {
61 in_addr_t addr;
62 struct in_addr ret;
63
64 if (net < 128)
65 addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST);
66 else if (net < 65536)
67 addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST);
68 else if (net < 16777216L)
69 addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
70 else
71 addr = net | host;
72 ret.s_addr = htonl(addr);
73 return ret;
74 }
75