Return to inet_makeaddr.c CVS log

Up to [CSRG BSD Unix] / 43BSDReno / lib / libc / net

BSD 4.3reno

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that: (1) source distributions retain this entire copyright
 * notice and comment, and (2) distributions including binaries display
 * the following acknowledgement:  ``This product includes software
 * developed by the University of California, Berkeley and its contributors''
 * in the documentation or other materials provided with the distribution
 * and in all advertising materials mentioning features or use of this
 * software. Neither the name of the University nor the names of its
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)inet_makeaddr.c	5.5 (Berkeley) 6/1/90";
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>
#include <netinet/in.h>

/*
 * Formulate an Internet address from network + host.  Used in
 * building addresses stored in the ifnet structure.
 */
struct in_addr
inet_makeaddr(net, host)
	u_long net, host;
{
	u_long addr;

	if (net < 128)
		addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST);
	else if (net < 65536)
		addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST);
	else if (net < 16777216L)
		addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
	else
		addr = net | host;
	addr = htonl(addr);
	return (*(struct in_addr *)&addr);
}

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.