sbin/ifconfig/ifvlan.c

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