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uipc_syscalls_50.c revision 1.5.2.2 
      1 /*	$NetBSD: uipc_syscalls_50.c,v 1.5.2.2 2020/04/08 14:08:00 martin 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/sys/time.h>
     52 #include <compat/sys/socket.h>
     53 #include <compat/sys/sockio.h>
     54 
     55 #include <compat/common/compat_mod.h>
     56 
     57 /*ARGSUSED*/
     58 static int
     59 compat_ifdatareq(struct lwp *l, u_long cmd, void *data)
     60 {
     61 	struct if_data ifi;
     62 	struct oifdatareq *ifdr = data;
     63 	struct ifnet *ifp;
     64 	int error;
     65 
     66 	/* Validate arguments. */
     67 	switch (cmd) {
     68 	case OSIOCGIFDATA:
     69 	case OSIOCZIFDATA:
     70 		break;
     71 	default:
     72 		return ENOSYS;
     73 	}
     74 
     75 	ifp = ifunit(ifdr->ifdr_name);
     76 	if (ifp == NULL)
     77 		return ENXIO;
     78 
     79 	/* Do work. */
     80 	switch (cmd) {
     81 	case OSIOCGIFDATA:
     82 		if_export_if_data(ifp, &ifi, false);
     83 		ifdatan2o(&ifdr->ifdr_data, &ifi);
     84 		return 0;
     85 
     86 	case OSIOCZIFDATA:
     87 		if (l != NULL) {
     88 			error = kauth_authorize_network(l->l_cred,
     89 			    KAUTH_NETWORK_INTERFACE,
     90 			    KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp,
     91 			    (void *)cmd, NULL);
     92 			if (error != 0)
     93 				return error;
     94 		}
     95 		if_export_if_data(ifp, &ifi, true);
     96 		ifdatan2o(&ifdr->ifdr_data, &ifi);
     97 		/* XXX if_lastchange? */
     98 		return 0;
     99 
    100 	default:
    101 		/* Impossible due to above validation, but makes gcc happy. */
    102 		return ENOSYS;
    103 	}
    104 }
    105 
    106 void
    107 uipc_syscalls_50_init(void)
    108 {
    109 
    110 	MODULE_HOOK_SET(uipc_syscalls_50_hook, compat_ifdatareq);
    111 }
    112 
    113 void
    114 uipc_syscalls_50_fini(void)
    115 {
    116 
    117 	MODULE_HOOK_UNSET(uipc_syscalls_50_hook);
    118 }
    119