vlan.c revision 1.8 
1/*	$NetBSD: vlan.c,v 1.8 2008/05/07 23:55:07 dyoung 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 1.8 2008/05/07 23:55:07 dyoung 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 <errno.h>
47#include <string.h>
48#include <stdlib.h>
49#include <stdio.h>
50#include <util.h>
51
52#include "env.h"
53#include "extern.h"
54#include "util.h"
55#include "vlan.h"
56
57struct pinteger vlantag = PINTEGER_INITIALIZER1(&vlantag, "VLAN tag",
58    0, USHRT_MAX, 10, setvlan, "vlantag", &command_root.pb_parser);
59
60struct piface vlanif = PIFACE_INITIALIZER(&vlanif, "vlanif", setvlanif,
61    "vlanif", &command_root.pb_parser);
62
63static const struct kwinst vlankw[] = {
64	  {.k_word = "vlan", .k_nextparser = &vlantag.pi_parser}
65	, {.k_word = "vlanif", .k_act = "vlan",
66	   .k_nextparser = &vlanif.pif_parser}
67	, {.k_word = "-vlanif", .k_key = "vlanif", .k_type = KW_T_STR,
68	   .k_str = "", .k_exec = setvlanif}
69};
70
71struct pkw vlan = PKW_INITIALIZER(&vlan, "vlan", NULL, NULL,
72    vlankw, __arraycount(vlankw), NULL);
73
74static int
75checkifname(prop_dictionary_t env)
76{
77	const char *ifname;
78
79	if ((ifname = getifname(env)) == NULL)
80		return 1;
81
82	return strncmp(ifname, "vlan", 4) != 0 ||
83	    !isdigit((unsigned char)ifname[4]);
84}
85
86static int
87getvlan(prop_dictionary_t env, struct vlanreq *vlr, bool quiet)
88{
89	memset(vlr, 0, sizeof(*vlr));
90
91	if (checkifname(env)) {
92		if (quiet)
93			return -1;
94		errx(EXIT_FAILURE, "valid only with vlan(4) interfaces");
95	}
96
97	if (indirect_ioctl(env, SIOCGETVLAN, vlr) == -1)
98		return -1;
99
100	return 0;
101}
102
103int
104setvlan(prop_dictionary_t env, prop_dictionary_t xenv)
105{
106	struct vlanreq vlr;
107	int64_t tag;
108
109	if (getvlan(env, &vlr, false) == -1)
110		err(EXIT_FAILURE, "%s: getvlan", __func__);
111
112	if (!prop_dictionary_get_int64(env, "vlantag", &tag)) {
113		errno = ENOENT;
114		return -1;
115	}
116
117	vlr.vlr_tag = tag;
118
119	if (indirect_ioctl(env, SIOCSETVLAN, &vlr) == -1)
120		err(EXIT_FAILURE, "SIOCSETVLAN");
121	return 0;
122}
123
124int
125setvlanif(prop_dictionary_t env, prop_dictionary_t xenv)
126{
127	struct vlanreq vlr;
128	const char *parent;
129	int64_t tag;
130
131	if (getvlan(env, &vlr, false) == -1)
132		err(EXIT_FAILURE, "%s: getsock", __func__);
133
134	if (!prop_dictionary_get_int64(env, "vlantag", &tag)) {
135		errno = ENOENT;
136		return -1;
137	}
138
139	if (!prop_dictionary_get_cstring_nocopy(env, "vlanif", &parent)) {
140		errno = ENOENT;
141		return -1;
142	}
143	strlcpy(vlr.vlr_parent, parent, sizeof(vlr.vlr_parent));
144	if (strcmp(parent, "") != 0)
145		vlr.vlr_tag = (unsigned short)tag;
146
147	if (indirect_ioctl(env, SIOCSETVLAN, &vlr) == -1)
148		err(EXIT_FAILURE, "SIOCSETVLAN");
149	return 0;
150}
151
152void
153vlan_status(prop_dictionary_t env, prop_dictionary_t oenv)
154{
155	struct vlanreq vlr;
156
157	if (getvlan(env, &vlr, true) == -1)
158		return;
159
160	if (vlr.vlr_tag || vlr.vlr_parent[0] != '\0')
161		printf("\tvlan: %d parent: %s\n",
162		    vlr.vlr_tag, vlr.vlr_parent[0] == '\0' ?
163		    "<none>" : vlr.vlr_parent);
164}
165