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1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
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3 | * All rights reserved. |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
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6 | * provided that the above copyright notice and this paragraph are |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
5b25cd8a MK |
16 | */ |
17 | ||
18 | #if defined(LIBC_SCCS) && !defined(lint) | |
b8fb3ea1 | 19 | static char sccsid[] = "@(#)inet_makeaddr.c 5.4 (Berkeley) %G%"; |
140b4f5f | 20 | #endif /* LIBC_SCCS and not lint */ |
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21 | |
22 | #include <sys/types.h> | |
056d5bbd | 23 | #include <netinet/in.h> |
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24 | |
25 | /* | |
26 | * Formulate an Internet address from network + host. Used in | |
27 | * building addresses stored in the ifnet structure. | |
28 | */ | |
29 | struct in_addr | |
3a3b7ace | 30 | inet_makeaddr(net, host) |
b8fb3ea1 | 31 | u_long net, host; |
9b8667c0 SL |
32 | { |
33 | u_long addr; | |
34 | ||
35 | if (net < 128) | |
4efde109 | 36 | addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST); |
9b8667c0 | 37 | else if (net < 65536) |
4efde109 | 38 | addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST); |
b8fb3ea1 | 39 | else if (net < 16777216L) |
4efde109 | 40 | addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST); |
b8fb3ea1 KS |
41 | else |
42 | addr = net | host; | |
9b8667c0 SL |
43 | addr = htonl(addr); |
44 | return (*(struct in_addr *)&addr); | |
45 | } |