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      1 /*	$NetBSD: uipc_syscalls_50.c,v 1.12 2022/09/28 15:32:09 msaitoh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2008 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 
     34 #if defined(_KERNEL_OPT)
     35 #include "opt_compat_netbsd.h"
     36 #endif
     37 
     38 #include <sys/param.h>
     39 #include <sys/kernel.h>
     40 #include <sys/msg.h>
     41 #include <sys/sysctl.h>
     42 #include <sys/syscallargs.h>
     43 #include <sys/errno.h>
     44 #include <sys/kauth.h>
     45 #include <sys/proc.h>
     46 #include <sys/time.h>
     47 #include <sys/compat_stub.h>
     48 
     49 #include <net/if.h>
     50 
     51 #include <compat/net/if.h>
     52 #include <compat/sys/time.h>
     53 #include <compat/sys/socket.h>
     54 #include <compat/sys/sockio.h>
     55 
     56 #include <compat/common/compat_mod.h>
     57 
     58 /*ARGSUSED*/
     59 static int
     60 compat_ifdatareq(struct lwp *l, u_long cmd, void *data)
     61 {
     62 	struct if_data ifi;
     63 	struct ifdatareq50 *ifdr = data;
     64 	struct ifnet *ifp;
     65 	int error;
     66 
     67 	/* Validate arguments. */
     68 	switch (cmd) {
     69 	case OSIOCGIFDATA:
     70 	case OSIOCZIFDATA:
     71 		break;
     72 	default:
     73 		return ENOSYS;
     74 	}
     75 
     76 	ifp = ifunit(ifdr->ifdr_name);
     77 	if (ifp == NULL)
     78 		return ENXIO;
     79 
     80 	/* Do work. */
     81 	switch (cmd) {
     82 	case OSIOCGIFDATA:
     83 		if_export_if_data(ifp, &ifi, false);
     84 		ifdatan2o(&ifdr->ifdr_data, &ifi);
     85 		return 0;
     86 
     87 	case OSIOCZIFDATA:
     88 		if (l != NULL) {
     89 			error = kauth_authorize_network(l->l_cred,
     90 			    KAUTH_NETWORK_INTERFACE,
     91 			    KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp,
     92 			    (void *)cmd, NULL);
     93 			if (error != 0)
     94 				return error;
     95 		}
     96 		if_export_if_data(ifp, &ifi, true);
     97 		ifdatan2o(&ifdr->ifdr_data, &ifi);
     98 		/* XXX if_lastchange? */
     99 		return 0;
    100 
    101 	default:
    102 		/* Impossible due to above validation, but makes gcc happy. */
    103 		return ENOSYS;
    104 	}
    105 }
    106 
    107 void
    108 uipc_syscalls_50_init(void)
    109 {
    110 
    111 	MODULE_HOOK_SET(uipc_syscalls_50_hook, compat_ifdatareq);
    112 }
    113 
    114 void
    115 uipc_syscalls_50_fini(void)
    116 {
    117 
    118 	MODULE_HOOK_UNSET(uipc_syscalls_50_hook);
    119 }
    120