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 |
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 | |