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uipc_syscalls_50.c revision 1.3.56.10 
      1 /*	$NetBSD: uipc_syscalls_50.c,v 1.3.56.10 2018/09/22 04:56:28 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 __KERNEL_RCSID(0, "$NetBSD: uipc_syscalls_50.c,v 1.3.56.10 2018/09/22 04:56:28 pgoyette Exp $");
     41 
     42 #if defined(_KERNEL_OPT)
     43 #include "opt_compat_netbsd.h"
     44 #endif
     45 
     46 #include <sys/param.h>
     47 #include <sys/kernel.h>
     48 #include <sys/msg.h>
     49 #include <sys/sysctl.h>
     50 #include <sys/syscallargs.h>
     51 #include <sys/errno.h>
     52 #include <sys/kauth.h>
     53 #include <sys/proc.h>
     54 #include <sys/time.h>
     55 #include <sys/compat_stub.h>
     56 
     57 #include <net/if.h>
     58 
     59 #include <compat/sys/time.h>
     60 #include <compat/sys/socket.h>
     61 #include <compat/sys/sockio.h>
     62 #include <compat/sys/if.h>
     63 
     64 #include <compat/common/compat_mod.h>
     65 
     66 /*ARGSUSED*/
     67 static int
     68 compat_ifdatareq(struct lwp *l, u_long cmd, void *data)
     69 {
     70 	struct oifdatareq *ifdr = data;
     71 	struct ifnet *ifp;
     72 	int error;
     73 
     74 	/* Validate arguments. */
     75 	switch (cmd) {
     76 	case SIOCGIFDATA:
     77 	case SIOCZIFDATA:
     78 		ifp = ifunit(ifdr->ifdr_name);
     79 		if (ifp == NULL)
     80 			return ENXIO;
     81 		break;
     82 	default:
     83 		return ENOSYS;
     84 	}
     85 
     86 	/* Do work. */
     87 	switch (cmd) {
     88 	case SIOCGIFDATA:
     89 		ifdatan2o(&ifdr->ifdr_data, &ifp->if_data);
     90 		return 0;
     91 
     92 	case SIOCZIFDATA:
     93 		if (l != NULL) {
     94 			error = kauth_authorize_network(l->l_cred,
     95 			    KAUTH_NETWORK_INTERFACE,
     96 			    KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp,
     97 			    (void *)cmd, NULL);
     98 			if (error != 0)
     99 				return error;
    100 		}
    101 		ifdatan2o(&ifdr->ifdr_data, &ifp->if_data);
    102 		/*
    103 		 * Assumes that the volatile counters that can be
    104 		 * zero'ed are at the end of if_data.
    105 		 */
    106 		memset(&ifp->if_data.ifi_ipackets, 0, sizeof(ifp->if_data) -
    107 		    offsetof(struct if_data, ifi_ipackets));
    108 		return 0;
    109 
    110 	default:
    111 		/* Impossible due to above validation, but makes gcc happy. */
    112 		return ENOSYS;
    113 	}
    114 }
    115 
    116 MODULE_SET_HOOK(uipc_syscalls_50_hook, "uipc50", compat_ifdatareq);
    117 MODULE_UNSET_HOOK(uipc_syscalls_50_hook);
    118 
    119 void
    120 uipc_syscalls_50_init(void)
    121 {
    122 
    123         uipc_syscalls_50_hook_set();
    124 }
    125 
    126 void
    127 uipc_syscalls_50_fini(void)
    128 {
    129 
    130         uipc_syscalls_50_hook_unset();
    131 }
    132 
    133