4.3BSD-Tahoe/usr/src/sys/net/af.h

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/*
 * Copyright (c) 1980, 1986 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not 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 MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *	@(#)af.h	7.3 (Berkeley) 6/27/88
 */

/*
 * Address family routines,
 * used in handling generic sockaddr structures.
 *
 * Hash routine is called
 *	af_hash(addr, h);
 *	struct sockaddr *addr; struct afhash *h;
 * producing an afhash structure for addr.
 *
 * Netmatch routine is called
 *	af_netmatch(addr1, addr2);
 * where addr1 and addr2 are sockaddr *.  Returns 1 if network
 * values match, 0 otherwise.
 */
struct afswitch {
	int	(*af_hash)();
	int	(*af_netmatch)();
};

struct afhash {
	u_int	afh_hosthash;
	u_int	afh_nethash;
};

#ifdef KERNEL
struct	afswitch afswitch[];
#endif