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uipc_syscalls_50.c revision 1.9 
      1 /*	$NetBSD: uipc_syscalls_50.c,v 1.9 2019/12/12 02:15:42 pgoyette 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 
     41 #if defined(_KERNEL_OPT)
     42 #include "opt_compat_netbsd.h"
     43 #endif
     44 
     45 #include <sys/param.h>
     46 #include <sys/kernel.h>
     47 #include <sys/msg.h>
     48 #include <sys/sysctl.h>
     49 #include <sys/syscallargs.h>
     50 #include <sys/errno.h>
     51 #include <sys/kauth.h>
     52 #include <sys/proc.h>
     53 #include <sys/time.h>
     54 #include <sys/compat_stub.h>
     55 
     56 #include <net/if.h>
     57 
     58 #include <compat/sys/time.h>
     59 #include <compat/sys/socket.h>
     60 #include <compat/sys/sockio.h>
     61 
     62 #include <compat/common/compat_mod.h>
     63 
     64 /*ARGSUSED*/
     65 static int
     66 compat_ifdatareq(struct lwp *l, u_long cmd, void *data)
     67 {
     68 	struct oifdatareq *ifdr = data;
     69 	struct ifnet *ifp;
     70 	int error;
     71 
     72 	/* Validate arguments. */
     73 	switch (cmd) {
     74 	case OSIOCGIFDATA:
     75 	case OSIOCZIFDATA:
     76 		break;
     77 	default:
     78 		return ENOSYS;
     79 	}
     80 
     81 	ifp = ifunit(ifdr->ifdr_name);
     82 	if (ifp == NULL)
     83 		return ENXIO;
     84 
     85 	/* Do work. */
     86 	switch (cmd) {
     87 	case OSIOCGIFDATA:
     88 		ifdatan2o(&ifdr->ifdr_data, &ifp->if_data);
     89 		return 0;
     90 
     91 	case OSIOCZIFDATA:
     92 		if (l != NULL) {
     93 			error = kauth_authorize_network(l->l_cred,
     94 			    KAUTH_NETWORK_INTERFACE,
     95 			    KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp,
     96 			    (void *)cmd, NULL);
     97 			if (error != 0)
     98 				return error;
     99 		}
    100 		ifdatan2o(&ifdr->ifdr_data, &ifp->if_data);
    101 		/*
    102 		 * Assumes that the volatile counters that can be
    103 		 * zero'ed are at the end of if_data.
    104 		 */
    105 		memset(&ifp->if_data.ifi_ipackets, 0, sizeof(ifp->if_data) -
    106 		    offsetof(struct if_data, ifi_ipackets));
    107 		return 0;
    108 
    109 	default:
    110 		/* Impossible due to above validation, but makes gcc happy. */
    111 		return ENOSYS;
    112 	}
    113 }
    114 
    115 void
    116 uipc_syscalls_50_init(void)
    117 {
    118 
    119 	MODULE_HOOK_SET(uipc_syscalls_50_hook, compat_ifdatareq);
    120 }
    121 
    122 void
    123 uipc_syscalls_50_fini(void)
    124 {
    125 
    126 	MODULE_HOOK_UNSET(uipc_syscalls_50_hook);
    127 }
    128