/*      $NetBSD: uipc_syscalls_50.c,v 1.12 2022/09/28 15:32:09 msaitoh Exp $    */

/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#include <sys/cdefs.h>

#if defined(_KERNEL_OPT)
#include "opt_compat_netbsd.h"
#endif

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/msg.h>
#include <sys/sysctl.h>
#include <sys/syscallargs.h>
#include <sys/errno.h>
#include <sys/kauth.h>
#include <sys/proc.h>
#include <sys/time.h>
#include <sys/compat_stub.h>

#include <net/if.h>

#include <compat/net/if.h>
#include <compat/sys/time.h>
#include <compat/sys/socket.h>
#include <compat/sys/sockio.h>

#include <compat/common/compat_mod.h>

/*ARGSUSED*/
static int
compat_ifdatareq(struct lwp *l, u_long cmd, void *data)
{
       struct if_data ifi;
       struct ifdatareq50 *ifdr = data;
       struct ifnet *ifp;
       int error;

       /* Validate arguments. */
       switch (cmd) {
       case OSIOCGIFDATA:
       case OSIOCZIFDATA:
               break;
       default:
               return ENOSYS;
       }

       ifp = ifunit(ifdr->ifdr_name);
       if (ifp == NULL)
               return ENXIO;

       /* Do work. */
       switch (cmd) {
       case OSIOCGIFDATA:
               if_export_if_data(ifp, &ifi, false);
               ifdatan2o(&ifdr->ifdr_data, &ifi);
               return 0;

       case OSIOCZIFDATA:
               if (l != NULL) {
                       error = kauth_authorize_network(l->l_cred,
                           KAUTH_NETWORK_INTERFACE,
                           KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp,
                           (void *)cmd, NULL);
                       if (error != 0)
                               return error;
               }
               if_export_if_data(ifp, &ifi, true);
               ifdatan2o(&ifdr->ifdr_data, &ifi);
               /* XXX if_lastchange? */
               return 0;

       default:
               /* Impossible due to above validation, but makes gcc happy. */
               return ENOSYS;
       }
}

void
uipc_syscalls_50_init(void)
{

       MODULE_HOOK_SET(uipc_syscalls_50_hook, compat_ifdatareq);
}

void
uipc_syscalls_50_fini(void)
{

       MODULE_HOOK_UNSET(uipc_syscalls_50_hook);
}