uipc_syscalls_50.c revision 1.5 
1/*	$NetBSD: uipc_syscalls_50.c,v 1.5 2018/04/26 08:11:18 roy 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 1.5 2018/04/26 08:11:18 roy Exp $");
41
42#include <sys/param.h>
43#include <sys/kernel.h>
44#include <sys/msg.h>
45#include <sys/sysctl.h>
46#include <sys/syscallargs.h>
47#include <sys/errno.h>
48#include <sys/kauth.h>
49#include <sys/proc.h>
50#include <sys/time.h>
51
52#include <net/if.h>
53
54#include <compat/sys/time.h>
55#include <compat/sys/socket.h>
56#include <compat/sys/sockio.h>
57
58/*ARGSUSED*/
59static int
60compat_ifdatareq(struct lwp *l, u_long cmd, void *data)
61{
62	struct oifdatareq *ifdr = data;
63	struct ifnet *ifp;
64	int error;
65
66	/* Validate arguments. */
67	switch (cmd) {
68	case SIOCGIFDATA:
69	case SIOCZIFDATA:
70		ifp = ifunit(ifdr->ifdr_name);
71		if (ifp == NULL)
72			return ENXIO;
73		break;
74	default:
75		return ENOSYS;
76	}
77
78	/* Do work. */
79	switch (cmd) {
80	case SIOCGIFDATA:
81		ifdatan2o(&ifdr->ifdr_data, &ifp->if_data);
82		return 0;
83
84	case SIOCZIFDATA:
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
108void
109uipc_syscalls_50_init(void)
110{
111	vec_compat_ifdatareq = compat_ifdatareq;
112}
113
114void
115uipc_syscalls_50_fini(void)
116{
117	vec_compat_ifdatareq = (void *)enosys;
118}
119