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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/param.h>
31 #include <netinet/in.h>
32 #include <arpa/inet.h>
33
34 /*
35 * Formulate an Internet address from network + host. Used in
36 * building addresses stored in the ifnet structure.
37 */
38 struct in_addr
__inet_makeaddr(in_addr_t net,in_addr_t host)39 __inet_makeaddr (in_addr_t net, in_addr_t host)
40 {
41 struct in_addr in;
42
43 if (net < 128)
44 in.s_addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST);
45 else if (net < 65536)
46 in.s_addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST);
47 else if (net < 16777216L)
48 in.s_addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
49 else
50 in.s_addr = net | host;
51 in.s_addr = htonl(in.s_addr);
52 return in;
53 }
54 libc_hidden_def (__inet_makeaddr)
55 weak_alias (__inet_makeaddr, inet_makeaddr)
56