ifvlan.c revision 151000 
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 151000 2005-10-06 15:05:55Z 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(vreq));
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
81static void
82setvlantag(const char *val, int d, int s, const struct afswtch	*afp)
83{
84	char			*endp;
85	u_long			ul;
86
87	ul = strtoul(val, &endp, 0);
88	if (*endp != '\0')
89		errx(1, "invalid value for vlan");
90	__vreq.vlr_tag = ul;
91	/* check if the value can be represented in vlr_tag */
92	if (__vreq.vlr_tag != ul)
93		errx(1, "value for vlan out of range");
94	/* the kernel will do more specific checks on vlr_tag */
95	__have_tag = 1;
96}
97
98static void
99setvlandev(const char *val, int d, int s, const struct afswtch	*afp)
100{
101
102	strncpy(__vreq.vlr_parent, val, sizeof(__vreq.vlr_parent));
103	__have_dev = 1;
104}
105
106static void
107unsetvlandev(const char *val, int d, int s, const struct afswtch *afp)
108{
109
110	if (val != NULL)
111		warnx("argument to -vlandev is useless and hence deprecated");
112
113	bzero((char *)&__vreq, sizeof(__vreq));
114	ifr.ifr_data = (caddr_t)&__vreq;
115#if 0	/* this code will be of use when we can alter vlan or vlandev only */
116	if (ioctl(s, SIOCGETVLAN, (caddr_t)&ifr) == -1)
117		err(1, "SIOCGETVLAN");
118
119	bzero((char *)&__vreq.vlr_parent, sizeof(__vreq.vlr_parent));
120	__vreq.vlr_tag = 0; /* XXX clear parent only (no kernel support now) */
121#endif
122	if (ioctl(s, SIOCSETVLAN, (caddr_t)&ifr) == -1)
123		err(1, "SIOCSETVLAN");
124	__have_dev = __have_tag = 0;
125}
126
127static void
128vlan_cb(int s, void *arg)
129{
130
131	if (__have_tag ^ __have_dev)
132		errx(1, "both vlan and vlandev must be specified");
133
134	if (__have_tag && __have_dev) {
135		ifr.ifr_data = (caddr_t)&__vreq;
136		if (ioctl(s, SIOCSETVLAN, (caddr_t)&ifr) == -1)
137			err(1, "SIOCSETVLAN");
138	}
139}
140
141static struct cmd vlan_cmds[] = {
142	DEF_CMD_ARG("vlan",				setvlantag),
143	DEF_CMD_ARG("vlandev",				setvlandev),
144	/* XXX For compatibility.  Should become DEF_CMD() some day. */
145	DEF_CMD_OPTARG("-vlandev",			unsetvlandev),
146	DEF_CMD("vlanmtu",	IFCAP_VLAN_MTU,		setifcap),
147	DEF_CMD("-vlanmtu",	-IFCAP_VLAN_MTU,	setifcap),
148	DEF_CMD("vlanhwtag",	IFCAP_VLAN_HWTAGGING,	setifcap),
149	DEF_CMD("-vlanhwtag",	-IFCAP_VLAN_HWTAGGING,	setifcap),
150};
151static struct afswtch af_vlan = {
152	.af_name	= "af_vlan",
153	.af_af		= AF_UNSPEC,
154	.af_other_status = vlan_status,
155};
156
157static __constructor void
158vlan_ctor(void)
159{
160#define	N(a)	(sizeof(a) / sizeof(a[0]))
161	int i;
162
163	for (i = 0; i < N(vlan_cmds);  i++)
164		cmd_register(&vlan_cmds[i]);
165	af_register(&af_vlan);
166	callback_register(vlan_cb, NULL);
167#undef N
168}
169