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Annotation of 43BSD/lib/libc/inet/inet_makeaddr.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  */
                      6: 
                      7: #if defined(LIBC_SCCS) && !defined(lint)
                      8: static char sccsid[] = "@(#)inet_makeaddr.c    5.1 (Berkeley) 3/11/86";
                      9: #endif LIBC_SCCS and not lint
                     10: 
                     11: #include <sys/types.h>
                     12: #include <netinet/in.h>
                     13: 
                     14: /*
                     15:  * Formulate an Internet address from network + host.  Used in
                     16:  * building addresses stored in the ifnet structure.
                     17:  */
                     18: struct in_addr
                     19: inet_makeaddr(net, host)
                     20:        int net, host;
                     21: {
                     22:        u_long addr;
                     23: 
                     24:        if (net < 128)
                     25:                addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST);
                     26:        else if (net < 65536)
                     27:                addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST);
                     28:        else
                     29:                addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
                     30:        addr = htonl(addr);
                     31:        return (*(struct in_addr *)&addr);
                     32: }

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