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      1 /*	$NetBSD: net_inet6_nd_90.c,v 1.2 2023/12/09 20:31:57 oster Exp $ */
      2 
      3 /*      $NetBSD: net_inet6_nd_90.c,v 1.2 2023/12/09 20:31:57 oster Exp $        */
      4 /*      $KAME: nd6.c,v 1.279 2002/06/08 11:16:51 itojun Exp $   */
      5 
      6 /*
      7  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
      8  * All rights reserved.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Neither the name of the project nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  */
     34 
     35 #include <sys/cdefs.h>
     36 __KERNEL_RCSID(0, "$NetBSD: net_inet6_nd_90.c,v 1.2 2023/12/09 20:31:57 oster Exp $");
     37 
     38 #if defined(_KERNEL_OPT)
     39 #include "opt_compat_netbsd.h"
     40 #endif
     41 
     42 #include <sys/param.h>
     43 #include <sys/systm.h>
     44 #include <sys/namei.h>
     45 #include <sys/filedesc.h>
     46 #include <sys/kernel.h>
     47 #include <sys/sysctl.h>
     48 
     49 #include <net/if.h>
     50 
     51 #include <netinet/in.h>
     52 
     53 #include <netinet/icmp6.h>
     54 #include <netinet/ip6.h>
     55 
     56 #include <netinet6/in6_var.h>
     57 #include <netinet6/nd6.h>
     58 
     59 #include <sys/compat_stub.h>
     60 
     61 #include <compat/common/compat_mod.h>
     62 
     63 #ifdef INET6
     64 
     65 static struct sysctllog *nd6_clog;
     66 
     67 /*
     68  * sysctl helper routine for the net.inet6.icmp6.nd6 nodes.  silly?
     69  */
     70 static int
     71 sysctl_net_inet6_icmp6_nd6(SYSCTLFN_ARGS)
     72 {
     73 	(void)&name;
     74 	(void)&l;
     75 	(void)&oname;
     76 
     77 	if (namelen != 0)
     78 		return (EINVAL);
     79 
     80 	return (nd6_sysctl(rnode->sysctl_num, oldp, oldlenp,
     81 	    /*XXXUNCONST*/
     82 	    __UNCONST(newp), newlen));
     83 }
     84 int real_net_inet6_nd_90(int);
     85 
     86 /*
     87  * the hook is only called for valid codes, so the mere presence
     88  * of the hook means success.
     89  */
     90 /* ARGSUSED */
     91 int
     92 real_net_inet6_nd_90(int name)
     93 {
     94 
     95 	return 0;
     96 }
     97 
     98 int
     99 net_inet6_nd_90_init(void)
    100 {
    101 	int error;
    102 
    103 	error = sysctl_createv(&nd6_clog, 0, NULL, NULL,
    104 		CTLFLAG_PERMANENT,
    105 		CTLTYPE_STRUCT, "nd6_drlist",
    106 		SYSCTL_DESCR("Default router list"),
    107 		sysctl_net_inet6_icmp6_nd6, 0, NULL, 0,
    108 		CTL_NET, PF_INET6, IPPROTO_ICMPV6,
    109 		OICMPV6CTL_ND6_DRLIST, CTL_EOL);
    110 	if (error != 0)
    111 		return error;
    112 
    113 	error = sysctl_createv(&nd6_clog, 0, NULL, NULL,
    114 		CTLFLAG_PERMANENT,
    115 		CTLTYPE_STRUCT, "nd6_prlist",
    116 		SYSCTL_DESCR("Prefix list"),
    117 		sysctl_net_inet6_icmp6_nd6, 0, NULL, 0,
    118 		CTL_NET, PF_INET6, IPPROTO_ICMPV6,
    119 		OICMPV6CTL_ND6_PRLIST, CTL_EOL);
    120 
    121 	MODULE_HOOK_SET(net_inet6_nd_90_hook, real_net_inet6_nd_90);
    122 	return error;
    123 }
    124 
    125 int
    126 net_inet6_nd_90_fini(void)
    127 {
    128 
    129 	sysctl_teardown(&nd6_clog);
    130 	MODULE_HOOK_UNSET(net_inet6_nd_90_hook);
    131 	return 0;
    132 }
    133 
    134 #endif /* INET6 */
    135 
    136