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uipc_syscalls_50.c revision 1.8.4.1 
      1 /*	$NetBSD: uipc_syscalls_50.c,v 1.8.4.1 2019/12/18 20:04:32 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 oifdatareq *ifdr = data;
     62 	struct ifnet *ifp;
     63 	int error;
     64 
     65 	/* Validate arguments. */
     66 	switch (cmd) {
     67 	case OSIOCGIFDATA:
     68 	case OSIOCZIFDATA:
     69 		break;
     70 	default:
     71 		return ENOSYS;
     72 	}
     73 
     74 	ifp = ifunit(ifdr->ifdr_name);
     75 	if (ifp == NULL)
     76 		return ENXIO;
     77 
     78 	/* Do work. */
     79 	switch (cmd) {
     80 	case OSIOCGIFDATA:
     81 		ifdatan2o(&ifdr->ifdr_data, &ifp->if_data);
     82 		return 0;
     83 
     84 	case OSIOCZIFDATA:
     85 		if (l != NULL) {
     86 			error = kauth_authorize_network(l->l_cred,
     87 			    KAUTH_NETWORK_INTERFACE,
     88 			    KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp,
     89 			    (void *)cmd, NULL);
     90 			if (error != 0)
     91 				return error;
     92 		}
     93 		ifdatan2o(&ifdr->ifdr_data, &ifp->if_data);
     94 		/*
     95 		 * Assumes that the volatile counters that can be
     96 		 * zero'ed are at the end of if_data.
     97 		 */
     98 		memset(&ifp->if_data.ifi_ipackets, 0, sizeof(ifp->if_data) -
     99 		    offsetof(struct if_data, ifi_ipackets));
    100 		return 0;
    101 
    102 	default:
    103 		/* Impossible due to above validation, but makes gcc happy. */
    104 		return ENOSYS;
    105 	}
    106 }
    107 
    108 void
    109 uipc_syscalls_50_init(void)
    110 {
    111 
    112 	MODULE_HOOK_SET(uipc_syscalls_50_hook, "uipc50", compat_ifdatareq);
    113 }
    114 
    115 void
    116 uipc_syscalls_50_fini(void)
    117 {
    118 
    119 	MODULE_HOOK_UNSET(uipc_syscalls_50_hook);
    120 }
    121