ifvlan.c revision 150736 
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 150736 2005-09-29 23:38:24Z yar $";
60#endif
61static int			__tag = 0;
62static int			__have_tag = 0;
63
64static void
65vlan_status(int s)
66{
67	struct vlanreq		vreq;
68
69	bzero((char *)&vreq, sizeof(struct vlanreq));
70	ifr.ifr_data = (caddr_t)&vreq;
71
72	if (ioctl(s, SIOCGETVLAN, (caddr_t)&ifr) == -1)
73		return;
74
75	printf("\tvlan: %d parent interface: %s\n",
76	    vreq.vlr_tag, vreq.vlr_parent[0] == '\0' ?
77	    "<none>" : vreq.vlr_parent);
78
79	return;
80}
81
82static void
83setvlantag(const char *val, int d, int s, const struct afswtch	*afp)
84{
85	u_int16_t		tag;
86	struct vlanreq		vreq;
87
88	__tag = tag = atoi(val);
89	__have_tag = 1;
90
91	bzero((char *)&vreq, sizeof(struct vlanreq));
92	ifr.ifr_data = (caddr_t)&vreq;
93
94	if (ioctl(s, SIOCGETVLAN, (caddr_t)&ifr) == -1)
95		err(1, "SIOCGETVLAN");
96
97	vreq.vlr_tag = tag;
98
99	if (ioctl(s, SIOCSETVLAN, (caddr_t)&ifr) == -1)
100		err(1, "SIOCSETVLAN");
101
102	return;
103}
104
105static void
106setvlandev(const char *val, int d, int s, const struct afswtch	*afp)
107{
108	struct vlanreq		vreq;
109
110	if (!__have_tag)
111		errx(1, "must specify both vlan tag and device");
112
113	bzero((char *)&vreq, sizeof(struct vlanreq));
114	ifr.ifr_data = (caddr_t)&vreq;
115
116	if (ioctl(s, SIOCGETVLAN, (caddr_t)&ifr) == -1)
117		err(1, "SIOCGETVLAN");
118
119	strncpy(vreq.vlr_parent, val, sizeof(vreq.vlr_parent));
120	vreq.vlr_tag = __tag;
121
122	if (ioctl(s, SIOCSETVLAN, (caddr_t)&ifr) == -1)
123		err(1, "SIOCSETVLAN");
124
125	return;
126}
127
128static void
129unsetvlandev(const char *val, int d, int s, const struct afswtch *afp)
130{
131	struct vlanreq		vreq;
132
133	if (val != NULL)
134		warnx("argument to -vlandev is useless and hence deprecated");
135
136	bzero((char *)&vreq, sizeof(struct vlanreq));
137	ifr.ifr_data = (caddr_t)&vreq;
138
139	if (ioctl(s, SIOCGETVLAN, (caddr_t)&ifr) == -1)
140		err(1, "SIOCGETVLAN");
141
142	bzero((char *)&vreq.vlr_parent, sizeof(vreq.vlr_parent));
143	vreq.vlr_tag = 0;
144
145	if (ioctl(s, SIOCSETVLAN, (caddr_t)&ifr) == -1)
146		err(1, "SIOCSETVLAN");
147
148	return;
149}
150
151static struct cmd vlan_cmds[] = {
152	DEF_CMD_ARG("vlan",				setvlantag),
153	DEF_CMD_ARG("vlandev",				setvlandev),
154	/* XXX For compatibility.  Should become DEF_CMD() some day. */
155	DEF_CMD_OPTARG("-vlandev",			unsetvlandev),
156	DEF_CMD("vlanmtu",	IFCAP_VLAN_MTU,		setifcap),
157	DEF_CMD("-vlanmtu",	-IFCAP_VLAN_MTU,	setifcap),
158	DEF_CMD("vlanhwtag",	IFCAP_VLAN_HWTAGGING,	setifcap),
159	DEF_CMD("-vlanhwtag",	-IFCAP_VLAN_HWTAGGING,	setifcap),
160};
161static struct afswtch af_vlan = {
162	.af_name	= "af_vlan",
163	.af_af		= AF_UNSPEC,
164	.af_other_status = vlan_status,
165};
166
167static __constructor void
168vlan_ctor(void)
169{
170#define	N(a)	(sizeof(a) / sizeof(a[0]))
171	int i;
172
173	for (i = 0; i < N(vlan_cmds);  i++)
174		cmd_register(&vlan_cmds[i]);
175	af_register(&af_vlan);
176#undef N
177}
178