vlan.c revision 1.1 
1/*	$NetBSD: vlan.c,v 1.1 2005/03/19 03:53:55 thorpej Exp $	*/
2
3/*
4 * Copyright (c) 1983, 1993
5 *      The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34__RCSID("$NetBSD: vlan.c,v 1.1 2005/03/19 03:53:55 thorpej Exp $");
35#endif /* not lint */
36
37#include <sys/param.h>
38#include <sys/ioctl.h>
39
40#include <net/if.h>
41#include <net/if_ether.h>
42#include <net/if_vlanvar.h>
43
44#include <ctype.h>
45#include <err.h>
46#include <string.h>
47#include <stdlib.h>
48#include <stdio.h>
49
50#include "vlan.h"
51
52extern struct ifreq ifr;
53extern int s;
54
55static u_int vlan_tag = (u_int)-1;
56
57static int
58checkifname(const char *name)
59{
60
61	return strncmp(name, "vlan", 4) != 0 ||
62	    !isdigit((unsigned char)name[4]);
63}
64
65static void
66assertifname(const char *name)
67{
68
69	if (checkifname(name)) {
70		errx(EXIT_FAILURE, "valid only with vlan(4) interfaces");
71	}
72}
73
74void
75setvlan(const char *val, int d)
76{
77	struct vlanreq vlr;
78
79	assertifname(ifr.ifr_name);
80
81	vlan_tag = atoi(val);
82
83	memset(&vlr, 0, sizeof(vlr));
84	ifr.ifr_data = (void *)&vlr;
85	if (ioctl(s, SIOCGETVLAN, &ifr) == -1)
86		err(EXIT_FAILURE, "SIOCGETVLAN");
87
88	vlr.vlr_tag = vlan_tag;
89
90	if (ioctl(s, SIOCSETVLAN, &ifr) == -1)
91		err(EXIT_FAILURE, "SIOCSETVLAN");
92}
93
94void
95setvlanif(const char *val, int d)
96{
97	struct vlanreq vlr;
98
99	assertifname(ifr.ifr_name);
100
101	if (vlan_tag == (u_int)-1)
102		errx(EXIT_FAILURE,
103		    "must specify both ``vlan'' and ``vlanif''");
104
105	memset(&vlr, 0, sizeof(vlr));
106	ifr.ifr_data = (void *)&vlr;
107
108	if (ioctl(s, SIOCGETVLAN, &ifr) == -1)
109		err(EXIT_FAILURE, "SIOCGETVLAN");
110
111	strlcpy(vlr.vlr_parent, val, sizeof(vlr.vlr_parent));
112	vlr.vlr_tag = vlan_tag;
113
114	if (ioctl(s, SIOCSETVLAN, &ifr) == -1)
115		err(EXIT_FAILURE, "SIOCSETVLAN");
116}
117
118void
119unsetvlanif(const char *val, int d)
120{
121	struct vlanreq vlr;
122
123	assertifname(ifr.ifr_name);
124
125	memset(&vlr, 0, sizeof(vlr));
126	ifr.ifr_data = (void *)&vlr;
127
128	if (ioctl(s, SIOCGETVLAN, &ifr) == -1)
129		err(EXIT_FAILURE, "SIOCGETVLAN");
130
131	vlr.vlr_parent[0] = '\0';
132	vlr.vlr_tag = 0;
133
134	if (ioctl(s, SIOCSETVLAN, &ifr) == -1)
135		err(EXIT_FAILURE, "SIOCSETVLAN");
136}
137
138void
139vlan_status(void)
140{
141	struct vlanreq vlr;
142
143	if (checkifname(ifr.ifr_name))
144		return;
145
146	memset(&vlr, 0, sizeof(vlr));
147	ifr.ifr_data = (void *)&vlr;
148
149	if (ioctl(s, SIOCGETVLAN, &ifr) == -1)
150		return;
151
152	if (vlr.vlr_tag || vlr.vlr_parent[0] != '\0')
153		printf("\tvlan: %d parent: %s\n",
154		    vlr.vlr_tag, vlr.vlr_parent[0] == '\0' ?
155		    "<none>" : vlr.vlr_parent);
156}
157