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vlan.c revision 1.1 
      1 /*	$NetBSD: vlan.c,v 1.1 2005/03/19 03:53:55 thorpej 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 1.1 2005/03/19 03:53:55 thorpej 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 <string.h>
     47 #include <stdlib.h>
     48 #include <stdio.h>
     49 
     50 #include "vlan.h"
     51 
     52 extern struct ifreq ifr;
     53 extern int s;
     54 
     55 static u_int vlan_tag = (u_int)-1;
     56 
     57 static int
     58 checkifname(const char *name)
     59 {
     60 
     61 	return strncmp(name, "vlan", 4) != 0 ||
     62 	    !isdigit((unsigned char)name[4]);
     63 }
     64 
     65 static void
     66 assertifname(const char *name)
     67 {
     68 
     69 	if (checkifname(name)) {
     70 		errx(EXIT_FAILURE, "valid only with vlan(4) interfaces");
     71 	}
     72 }
     73 
     74 void
     75 setvlan(const char *val, int d)
     76 {
     77 	struct vlanreq vlr;
     78 
     79 	assertifname(ifr.ifr_name);
     80 
     81 	vlan_tag = atoi(val);
     82 
     83 	memset(&vlr, 0, sizeof(vlr));
     84 	ifr.ifr_data = (void *)&vlr;
     85 	if (ioctl(s, SIOCGETVLAN, &ifr) == -1)
     86 		err(EXIT_FAILURE, "SIOCGETVLAN");
     87 
     88 	vlr.vlr_tag = vlan_tag;
     89 
     90 	if (ioctl(s, SIOCSETVLAN, &ifr) == -1)
     91 		err(EXIT_FAILURE, "SIOCSETVLAN");
     92 }
     93 
     94 void
     95 setvlanif(const char *val, int d)
     96 {
     97 	struct vlanreq vlr;
     98 
     99 	assertifname(ifr.ifr_name);
    100 
    101 	if (vlan_tag == (u_int)-1)
    102 		errx(EXIT_FAILURE,
    103 		    "must specify both ``vlan'' and ``vlanif''");
    104 
    105 	memset(&vlr, 0, sizeof(vlr));
    106 	ifr.ifr_data = (void *)&vlr;
    107 
    108 	if (ioctl(s, SIOCGETVLAN, &ifr) == -1)
    109 		err(EXIT_FAILURE, "SIOCGETVLAN");
    110 
    111 	strlcpy(vlr.vlr_parent, val, sizeof(vlr.vlr_parent));
    112 	vlr.vlr_tag = vlan_tag;
    113 
    114 	if (ioctl(s, SIOCSETVLAN, &ifr) == -1)
    115 		err(EXIT_FAILURE, "SIOCSETVLAN");
    116 }
    117 
    118 void
    119 unsetvlanif(const char *val, int d)
    120 {
    121 	struct vlanreq vlr;
    122 
    123 	assertifname(ifr.ifr_name);
    124 
    125 	memset(&vlr, 0, sizeof(vlr));
    126 	ifr.ifr_data = (void *)&vlr;
    127 
    128 	if (ioctl(s, SIOCGETVLAN, &ifr) == -1)
    129 		err(EXIT_FAILURE, "SIOCGETVLAN");
    130 
    131 	vlr.vlr_parent[0] = '\0';
    132 	vlr.vlr_tag = 0;
    133 
    134 	if (ioctl(s, SIOCSETVLAN, &ifr) == -1)
    135 		err(EXIT_FAILURE, "SIOCSETVLAN");
    136 }
    137 
    138 void
    139 vlan_status(void)
    140 {
    141 	struct vlanreq vlr;
    142 
    143 	if (checkifname(ifr.ifr_name))
    144 		return;
    145 
    146 	memset(&vlr, 0, sizeof(vlr));
    147 	ifr.ifr_data = (void *)&vlr;
    148 
    149 	if (ioctl(s, SIOCGETVLAN, &ifr) == -1)
    150 		return;
    151 
    152 	if (vlr.vlr_tag || vlr.vlr_parent[0] != '\0')
    153 		printf("\tvlan: %d parent: %s\n",
    154 		    vlr.vlr_tag, vlr.vlr_parent[0] == '\0' ?
    155 		    "<none>" : vlr.vlr_parent);
    156 }
    157