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 * $FreeBSD: src/sbin/ifconfig/ifvlan.c,v 1.7.2.4 2006/02/09 10:48:43 yar Exp $
33 */
34
35 #include <sys/param.h>
36 #include <sys/ioctl.h>
37 #include <sys/socket.h>
38 #include <sys/sockio.h>
39
40 #include <net/if.h>
41 #include <net/if_var.h>
42 #include <net/route.h>
43 #include <net/ethernet.h>
44 #include <net/vlan/if_vlan_var.h>
45
46 #include <ctype.h>
47 #include <stdio.h>
48 #include <stdlib.h>
49 #include <string.h>
50 #include <unistd.h>
51 #include <err.h>
52 #include <errno.h>
53
54 #include "ifconfig.h"
55
56 static struct vlanreq __vreq;
57 static int __have_dev = 0;
58 static int __have_tag = 0;
59
60 static void
vlan_status(int s)61 vlan_status(int s)
62 {
63 struct vlanreq vreq;
64 struct ifreq ifr;
65
66 memset(&ifr, 0, sizeof(ifr));
67 memset(&vreq, 0, sizeof(vreq));
68
69 strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name));
70 ifr.ifr_data = &vreq;
71
72 if (ioctl(s, SIOCGETVLAN, &ifr) == -1)
73 return;
74
75 printf("\tvlan: %d parent interface: %s\n", vreq.vlr_tag,
76 vreq.vlr_parent[0] == '\0' ? "<none>" : vreq.vlr_parent);
77 }
78
79 static void
setvlantag(const char * val,int d __unused,int s __unused,const struct afswtch * afp __unused)80 setvlantag(const char *val, int d __unused, int s __unused,
81 const struct afswtch *afp __unused)
82 {
83 char *endp;
84 u_long ul;
85
86 ul = strtoul(val, &endp, 0);
87 if (*endp != '\0')
88 errx(1, "invalid value for vlan");
89 __vreq.vlr_tag = ul;
90 /* check if the value can be represented in vlr_tag */
91 if (__vreq.vlr_tag != ul)
92 errx(1, "value for vlan out of range");
93 /* the kernel will do more specific checks on vlr_tag */
94 __have_tag = 1;
95 }
96
97 static void
setvlandev(const char * val,int d __unused,int s __unused,const struct afswtch * afp __unused)98 setvlandev(const char *val, int d __unused, int s __unused,
99 const struct afswtch *afp __unused)
100 {
101 strlcpy(__vreq.vlr_parent, val, sizeof(__vreq.vlr_parent));
102 __have_dev = 1;
103 }
104
105 static void
unsetvlandev(const char * val,int d __unused,int s,const struct afswtch * afp __unused)106 unsetvlandev(const char *val, int d __unused, int s,
107 const struct afswtch *afp __unused)
108 {
109 struct ifreq ifr;
110
111 if (val != NULL)
112 warnx("argument to -vlandev is useless and hence deprecated");
113
114 memset(&ifr, 0, sizeof(ifr));
115 memset(&__vreq, 0, sizeof(__vreq));
116
117 strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name));
118 ifr.ifr_data = &__vreq;
119
120 #if 0 /* this code will be of use when we can alter vlan or vlandev only */
121 if (ioctl(s, SIOCGETVLAN, &ifr) == -1)
122 err(1, "SIOCGETVLAN");
123
124 memset(&__vreq.vlr_parent, 0, sizeof(__vreq.vlr_parent));
125 __vreq.vlr_tag = 0; /* XXX clear parent only (no kernel support now) */
126 #endif
127
128 if (ioctl(s, SIOCSETVLAN, &ifr) == -1)
129 err(1, "SIOCSETVLAN");
130 __have_dev = __have_tag = 0;
131 }
132
133 static void
vlan_cb(int s,void * arg __unused)134 vlan_cb(int s, void *arg __unused)
135 {
136 struct ifreq ifr;
137
138 if (__have_tag ^ __have_dev)
139 errx(1, "both vlan and vlandev must be specified");
140
141 if (__have_tag && __have_dev) {
142 memset(&ifr, 0, sizeof(ifr));
143 strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name));
144 ifr.ifr_data = &__vreq;
145 if (ioctl(s, SIOCSETVLAN, &ifr) == -1)
146 err(1, "SIOCSETVLAN");
147 }
148 }
149
150 static struct cmd vlan_cmds[] = {
151 DEF_CMD_ARG("vlan", setvlantag),
152 DEF_CMD_ARG("vlandev", setvlandev),
153 /* XXX For compatibility. Should become DEF_CMD() some day. */
154 DEF_CMD_OPTARG("-vlandev", unsetvlandev),
155 DEF_CMD("vlanmtu", IFCAP_VLAN_MTU, setifcap),
156 DEF_CMD("-vlanmtu", -IFCAP_VLAN_MTU, setifcap),
157 DEF_CMD("vlanhwtag", IFCAP_VLAN_HWTAGGING, setifcap),
158 DEF_CMD("-vlanhwtag", -IFCAP_VLAN_HWTAGGING, setifcap),
159 };
160 static struct afswtch af_vlan = {
161 .af_name = "af_vlan",
162 .af_af = AF_UNSPEC,
163 .af_other_status = vlan_status,
164 };
165
166 __constructor(124)
167 static void
vlan_ctor(void)168 vlan_ctor(void)
169 {
170 size_t i;
171
172 for (i = 0; i < nitems(vlan_cmds); i++)
173 cmd_register(&vlan_cmds[i]);
174
175 af_register(&af_vlan);
176 callback_register(vlan_cb, NULL);
177 }
178