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vlan.c revision 1.9 
      1 /*	$NetBSD: vlan.c,v 1.9 2008/05/16 20:53:35 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 1.9 2008/05/16 20:53:35 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 
     57 struct pinteger vlantag = PINTEGER_INITIALIZER1(&vlantag, "VLAN tag",
     58     0, USHRT_MAX, 10, setvlan, "vlantag", &command_root.pb_parser);
     59 
     60 struct piface vlanif = PIFACE_INITIALIZER(&vlanif, "vlanif", setvlanif,
     61     "vlanif", &command_root.pb_parser);
     62 
     63 static const struct kwinst vlankw[] = {
     64 	  {.k_word = "vlan", .k_nextparser = &vlantag.pi_parser}
     65 	, {.k_word = "vlanif", .k_act = "vlantag",
     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 
     71 struct pkw vlan = PKW_INITIALIZER(&vlan, "vlan", NULL, NULL,
     72     vlankw, __arraycount(vlankw), NULL);
     73 
     74 static int
     75 checkifname(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 
     86 static int
     87 getvlan(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 
    103 int
    104 setvlan(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 
    124 int
    125 setvlanif(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 
    152 void
    153 vlan_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