ifvlan.c revision 150907 
1/*
2 * Copyright (c) 1999
3 *	Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include <sys/param.h>
34#include <sys/ioctl.h>
35#include <sys/socket.h>
36#include <sys/sockio.h>
37
38#include <stdlib.h>
39#include <unistd.h>
40
41#include <net/ethernet.h>
42#include <net/if.h>
43#include <net/if_var.h>
44#include <net/if_vlan_var.h>
45#include <net/route.h>
46
47#include <ctype.h>
48#include <stdio.h>
49#include <string.h>
50#include <stdlib.h>
51#include <unistd.h>
52#include <err.h>
53#include <errno.h>
54
55#include "ifconfig.h"
56
57#ifndef lint
58static const char rcsid[] =
59  "$FreeBSD: head/sbin/ifconfig/ifvlan.c 150907 2005-10-04 11:48:03Z yar $";
60#endif
61static struct vlanreq		__vreq;
62static int			__have_dev = 0;
63static int			__have_tag = 0;
64
65static void
66vlan_status(int s)
67{
68	struct vlanreq		vreq;
69
70	bzero((char *)&vreq, sizeof(struct vlanreq));
71	ifr.ifr_data = (caddr_t)&vreq;
72
73	if (ioctl(s, SIOCGETVLAN, (caddr_t)&ifr) == -1)
74		return;
75
76	printf("\tvlan: %d parent interface: %s\n",
77	    vreq.vlr_tag, vreq.vlr_parent[0] == '\0' ?
78	    "<none>" : vreq.vlr_parent);
79
80	return;
81}
82
83static void
84setvlantag(const char *val, int d, int s, const struct afswtch	*afp)
85{
86	char			*endp;
87	u_long			ul;
88
89	ul = strtoul(val, &endp, 0);
90	if (*endp != '\0')
91		errx(1, "invalid value for vlan");
92	__vreq.vlr_tag = ul;
93	/* check if the value can be represented in vlr_tag */
94	if (__vreq.vlr_tag != ul)
95		errx(1, "value for vlan out of range");
96	/* the kernel will do more specific checks on vlr_tag */
97	__have_tag = 1;
98}
99
100static void
101setvlandev(const char *val, int d, int s, const struct afswtch	*afp)
102{
103
104	strncpy(__vreq.vlr_parent, val, sizeof(__vreq.vlr_parent));
105	__have_dev = 1;
106}
107
108static void
109unsetvlandev(const char *val, int d, int s, const struct afswtch *afp)
110{
111	struct vlanreq		vreq;
112
113	if (val != NULL)
114		warnx("argument to -vlandev is useless and hence deprecated");
115
116	bzero((char *)&vreq, sizeof(struct vlanreq));
117	ifr.ifr_data = (caddr_t)&vreq;
118
119	if (ioctl(s, SIOCGETVLAN, (caddr_t)&ifr) == -1)
120		err(1, "SIOCGETVLAN");
121
122	bzero((char *)&vreq.vlr_parent, sizeof(vreq.vlr_parent));
123	vreq.vlr_tag = 0; /* XXX clear parent only (no kernel support now) */
124
125	if (ioctl(s, SIOCSETVLAN, (caddr_t)&ifr) == -1)
126		err(1, "SIOCSETVLAN");
127	__have_dev = __have_tag = 0;
128}
129
130static void
131vlan_cb(int s, void *arg)
132{
133
134	if (__have_tag ^ __have_dev)
135		errx(1, "both vlan and vlandev must be specified");
136
137	if (__have_tag && __have_dev) {
138		ifr.ifr_data = (caddr_t)&__vreq;
139		if (ioctl(s, SIOCSETVLAN, (caddr_t)&ifr) == -1)
140			err(1, "SIOCSETVLAN");
141	}
142}
143
144static struct cmd vlan_cmds[] = {
145	DEF_CMD_ARG("vlan",				setvlantag),
146	DEF_CMD_ARG("vlandev",				setvlandev),
147	/* XXX For compatibility.  Should become DEF_CMD() some day. */
148	DEF_CMD_OPTARG("-vlandev",			unsetvlandev),
149	DEF_CMD("vlanmtu",	IFCAP_VLAN_MTU,		setifcap),
150	DEF_CMD("-vlanmtu",	-IFCAP_VLAN_MTU,	setifcap),
151	DEF_CMD("vlanhwtag",	IFCAP_VLAN_HWTAGGING,	setifcap),
152	DEF_CMD("-vlanhwtag",	-IFCAP_VLAN_HWTAGGING,	setifcap),
153};
154static struct afswtch af_vlan = {
155	.af_name	= "af_vlan",
156	.af_af		= AF_UNSPEC,
157	.af_other_status = vlan_status,
158};
159
160static __constructor void
161vlan_ctor(void)
162{
163#define	N(a)	(sizeof(a) / sizeof(a[0]))
164	int i;
165
166	for (i = 0; i < N(vlan_cmds);  i++)
167		cmd_register(&vlan_cmds[i]);
168	af_register(&af_vlan);
169	callback_register(vlan_cb, NULL);
170#undef N
171}
172