usr/src/sys/net/af.c

/*
 * Copyright (c) 1983, 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.c        7.4 (Berkeley) 6/27/88
 */

#include "param.h"
#include "mbuf.h"
#include "protosw.h"
#include "socket.h"
#include "socketvar.h"
#include "af.h"

/*
 * Address family support routines
 */
int     null_hash(), null_netmatch();
#define AFNULL \
        { null_hash,    null_netmatch }

#ifdef INET
extern int inet_hash(), inet_netmatch();
#define AFINET \
        { inet_hash,    inet_netmatch }
#else
#define AFINET  AFNULL
#endif

#ifdef NS
extern int ns_hash(), ns_netmatch();
#define AFNS \
        { ns_hash,      ns_netmatch }
#else
#define AFNS    AFNULL
#endif

struct afswitch afswitch[AF_MAX] = {
        AFNULL, AFNULL, AFINET, AFINET, AFNULL,
        AFNULL, AFNS,   AFNULL, AFNULL, AFNULL,
        AFNULL, AFNULL, AFNULL, AFNULL, AFNULL,
        AFNULL, AFNULL,                                 /* through 16 */
};

null_init()
{
        register struct afswitch *af;

        for (af = afswitch; af < &afswitch[AF_MAX]; af++)
                if (af->af_hash == (int (*)())NULL) {
                        af->af_hash = null_hash;
                        af->af_netmatch = null_netmatch;
                }
}

/*ARGSUSED*/
null_hash(addr, hp)
        struct sockaddr *addr;
        struct afhash *hp;
{

        hp->afh_nethash = hp->afh_hosthash = 0;
}

/*ARGSUSED*/
null_netmatch(a1, a2)
        struct sockaddr *a1, *a2;
{

        return (0);
}