ifconfig.tproj/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
  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 #include <sys/cdefs.h>
  58
  59 #define NOTAG   ((u_short) -1)
  60
  61 static  struct vlanreq params = {
  62         .vlr_tag        = NOTAG,
  63 };
  64
  65 static int
  66 getvlan(int s, struct ifreq *ifr, struct vlanreq *vreq)
  67 {
  68         bzero((char *)vreq, sizeof(*vreq));
  69         ifr->ifr_data = (caddr_t)vreq;
  70
  71         return ioctl(s, SIOCGETVLAN, (caddr_t)ifr);
  72 }
  73
  74 static void
  75 vlan_status(int s)
  76 {
  77         struct vlanreq          vreq;
  78
  79         if (getvlan(s, &ifr, &vreq) != -1)
  80                 printf("\tvlan: %d parent interface: %s\n",
  81                     vreq.vlr_tag, vreq.vlr_parent[0] == '\0' ?
  82                     "<none>" : vreq.vlr_parent);
  83 }
  84
  85 static void
  86 vlan_create(int s, struct ifreq *ifr)
  87 {
  88         if (params.vlr_tag != NOTAG || params.vlr_parent[0] != '\0') {
  89                 /*
  90                  * One or both parameters were specified, make sure both.
  91                  */
  92                 if (params.vlr_tag == NOTAG)
  93                         errx(1, "must specify a tag for vlan create");
  94                 if (params.vlr_parent[0] == '\0')
  95                         errx(1, "must specify a parent device for vlan create");
  96                 ifr->ifr_data = (caddr_t) &params;
  97         }
  98 #ifdef SIOCIFCREATE2
  99         if (ioctl(s, SIOCIFCREATE2, ifr) < 0)
 100                 err(1, "SIOCIFCREATE2");
 101 #else
 102         if (ioctl(s, SIOCIFCREATE, ifr) < 0)
 103                 err(1, "SIOCIFCREATE");
 104 #endif
 105 }
 106
 107 static void
 108 vlan_cb(int s, void *arg)
 109 {
 110         if ((params.vlr_tag != NOTAG) ^ (params.vlr_parent[0] != '\0'))
 111                 errx(1, "both vlan and vlandev must be specified");
 112 }
 113
 114 static void
 115 vlan_set(int s, struct ifreq *ifr)
 116 {
 117         if (params.vlr_tag != NOTAG && params.vlr_parent[0] != '\0') {
 118                 ifr->ifr_data = (caddr_t) &params;
 119                 if (ioctl(s, SIOCSETVLAN, (caddr_t)ifr) == -1)
 120                         err(1, "SIOCSETVLAN");
 121         }
 122 }
 123
 124 static
 125 DECL_CMD_FUNC(setvlantag, val, d)
 126 {
 127         struct vlanreq vreq;
 128         u_long ul;
 129         char *endp;
 130
 131         ul = strtoul(val, &endp, 0);
 132         if (*endp != '\0')
 133                 errx(1, "invalid value for vlan");
 134         params.vlr_tag = ul;
 135         /* check if the value can be represented in vlr_tag */
 136         if (params.vlr_tag != ul)
 137                 errx(1, "value for vlan out of range");
 138
 139         if (getvlan(s, &ifr, &vreq) != -1)
 140                 vlan_set(s, &ifr);
 141         else
 142                 clone_setcallback(vlan_create);
 143 }
 144
 145 static
 146 DECL_CMD_FUNC(setvlandev, val, d)
 147 {
 148         struct vlanreq vreq;
 149
 150         strlcpy(params.vlr_parent, val, sizeof(params.vlr_parent));
 151
 152         if (getvlan(s, &ifr, &vreq) != -1)
 153                 vlan_set(s, &ifr);
 154         else
 155                 clone_setcallback(vlan_create);
 156 }
 157
 158 static
 159 DECL_CMD_FUNC(unsetvlandev, val, d)
 160 {
 161         struct vlanreq          vreq;
 162
 163         bzero((char *)&vreq, sizeof(struct vlanreq));
 164         ifr.ifr_data = (caddr_t)&vreq;
 165
 166         if (ioctl(s, SIOCGETVLAN, (caddr_t)&ifr) == -1)
 167                 err(1, "SIOCGETVLAN");
 168
 169         bzero((char *)&vreq.vlr_parent, sizeof(vreq.vlr_parent));
 170         vreq.vlr_tag = 0;
 171
 172         if (ioctl(s, SIOCSETVLAN, (caddr_t)&ifr) == -1)
 173                 err(1, "SIOCSETVLAN");
 174 }
 175
 176 static struct cmd vlan_cmds[] = {
 177         DEF_CLONE_CMD_ARG("vlan",                       setvlantag),
 178         DEF_CLONE_CMD_ARG("vlandev",                    setvlandev),
 179         /* XXX For compatibility.  Should become DEF_CMD() some day. */
 180         DEF_CMD_OPTARG("-vlandev",                      unsetvlandev),
 181 #ifdef IFCAP_VLAN_MTU
 182         DEF_CMD("vlanmtu",      IFCAP_VLAN_MTU,         setifcap),
 183         DEF_CMD("-vlanmtu",     -IFCAP_VLAN_MTU,        setifcap),
 184 #endif /* IFCAP_VLAN_MTU */
 185 #ifdef IFCAP_VLAN_HWTAGGING
 186         DEF_CMD("vlanhwtag",    IFCAP_VLAN_HWTAGGING,   setifcap),
 187         DEF_CMD("-vlanhwtag",   -IFCAP_VLAN_HWTAGGING,  setifcap),
 188 #endif /* IFCAP_VLAN_HWTAGGING */
 189 };
 190 static struct afswtch af_vlan = {
 191         .af_name        = "af_vlan",
 192         .af_af          = AF_UNSPEC,
 193         .af_other_status = vlan_status,
 194 };
 195
 196 static __constructor void
 197 vlan_ctor(void)
 198 {
 199 #define N(a)    (sizeof(a) / sizeof(a[0]))
 200         int i;
 201
 202         for (i = 0; i < N(vlan_cmds);  i++)
 203                 cmd_register(&vlan_cmds[i]);
 204         af_register(&af_vlan);
 205         callback_register(vlan_cb, NULL);
 206 #undef N
 207 }