ifvlan.c revision 330897
1/*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1999 Bill Paul <wpaul@ctr.columbia.edu> 5 * Copyright (c) 2012 ADARA Networks, Inc. 6 * All rights reserved. 7 * 8 * Portions of this software were developed by Robert N. M. Watson under 9 * contract to ADARA Networks, Inc. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Bill Paul. 22 * 4. Neither the name of the author nor the names of any co-contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 36 * THE POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39#include <sys/param.h> 40#include <sys/ioctl.h> 41#include <sys/socket.h> 42#include <sys/sockio.h> 43 44#include <stdlib.h> 45#include <unistd.h> 46 47#include <net/ethernet.h> 48#include <net/if.h> 49#include <net/if_vlan_var.h> 50#include <net/route.h> 51 52#include <ctype.h> 53#include <stdio.h> 54#include <string.h> 55#include <stdlib.h> 56#include <unistd.h> 57#include <err.h> 58#include <errno.h> 59 60#include "ifconfig.h" 61 62#ifndef lint 63static const char rcsid[] = 64 "$FreeBSD: stable/11/sbin/ifconfig/ifvlan.c 330897 2018-03-14 03:19:51Z eadler $"; 65#endif 66 67#define NOTAG ((u_short) -1) 68 69static struct vlanreq params = { 70 .vlr_tag = NOTAG, 71}; 72 73static int 74getvlan(int s, struct ifreq *ifr, struct vlanreq *vreq) 75{ 76 bzero((char *)vreq, sizeof(*vreq)); 77 ifr->ifr_data = (caddr_t)vreq; 78 79 return ioctl(s, SIOCGETVLAN, (caddr_t)ifr); 80} 81 82static void 83vlan_status(int s) 84{ 85 struct vlanreq vreq; 86 87 if (getvlan(s, &ifr, &vreq) == -1) 88 return; 89 printf("\tvlan: %d", vreq.vlr_tag); 90 if (ioctl(s, SIOCGVLANPCP, (caddr_t)&ifr) != -1) 91 printf(" vlanpcp: %u", ifr.ifr_vlan_pcp); 92 printf(" parent interface: %s", vreq.vlr_parent[0] == '\0' ? 93 "<none>" : vreq.vlr_parent); 94 printf("\n"); 95} 96 97static void 98vlan_create(int s, struct ifreq *ifr) 99{ 100 if (params.vlr_tag != NOTAG || params.vlr_parent[0] != '\0') { 101 /* 102 * One or both parameters were specified, make sure both. 103 */ 104 if (params.vlr_tag == NOTAG) 105 errx(1, "must specify a tag for vlan create"); 106 if (params.vlr_parent[0] == '\0') 107 errx(1, "must specify a parent device for vlan create"); 108 ifr->ifr_data = (caddr_t) ¶ms; 109 } 110 if (ioctl(s, SIOCIFCREATE2, ifr) < 0) 111 err(1, "SIOCIFCREATE2"); 112} 113 114static void 115vlan_cb(int s, void *arg) 116{ 117 if ((params.vlr_tag != NOTAG) ^ (params.vlr_parent[0] != '\0')) 118 errx(1, "both vlan and vlandev must be specified"); 119} 120 121static void 122vlan_set(int s, struct ifreq *ifr) 123{ 124 if (params.vlr_tag != NOTAG && params.vlr_parent[0] != '\0') { 125 ifr->ifr_data = (caddr_t) ¶ms; 126 if (ioctl(s, SIOCSETVLAN, (caddr_t)ifr) == -1) 127 err(1, "SIOCSETVLAN"); 128 } 129} 130 131static 132DECL_CMD_FUNC(setvlantag, val, d) 133{ 134 struct vlanreq vreq; 135 u_long ul; 136 char *endp; 137 138 ul = strtoul(val, &endp, 0); 139 if (*endp != '\0') 140 errx(1, "invalid value for vlan"); 141 params.vlr_tag = ul; 142 /* check if the value can be represented in vlr_tag */ 143 if (params.vlr_tag != ul) 144 errx(1, "value for vlan out of range"); 145 146 if (getvlan(s, &ifr, &vreq) != -1) 147 vlan_set(s, &ifr); 148} 149 150static 151DECL_CMD_FUNC(setvlandev, val, d) 152{ 153 struct vlanreq vreq; 154 155 strlcpy(params.vlr_parent, val, sizeof(params.vlr_parent)); 156 157 if (getvlan(s, &ifr, &vreq) != -1) 158 vlan_set(s, &ifr); 159} 160 161static 162DECL_CMD_FUNC(setvlanpcp, val, d) 163{ 164 u_long ul; 165 char *endp; 166 167 ul = strtoul(val, &endp, 0); 168 if (*endp != '\0') 169 errx(1, "invalid value for vlanpcp"); 170 if (ul > 7) 171 errx(1, "value for vlanpcp out of range"); 172 ifr.ifr_vlan_pcp = ul; 173 if (ioctl(s, SIOCSVLANPCP, (caddr_t)&ifr) == -1) 174 err(1, "SIOCSVLANPCP"); 175} 176 177static 178DECL_CMD_FUNC(unsetvlandev, val, d) 179{ 180 struct vlanreq vreq; 181 182 bzero((char *)&vreq, sizeof(struct vlanreq)); 183 ifr.ifr_data = (caddr_t)&vreq; 184 185 if (ioctl(s, SIOCGETVLAN, (caddr_t)&ifr) == -1) 186 err(1, "SIOCGETVLAN"); 187 188 bzero((char *)&vreq.vlr_parent, sizeof(vreq.vlr_parent)); 189 vreq.vlr_tag = 0; 190 191 if (ioctl(s, SIOCSETVLAN, (caddr_t)&ifr) == -1) 192 err(1, "SIOCSETVLAN"); 193} 194 195static struct cmd vlan_cmds[] = { 196 DEF_CLONE_CMD_ARG("vlan", setvlantag), 197 DEF_CLONE_CMD_ARG("vlandev", setvlandev), 198 DEF_CMD_ARG("vlanpcp", setvlanpcp), 199 /* NB: non-clone cmds */ 200 DEF_CMD_ARG("vlan", setvlantag), 201 DEF_CMD_ARG("vlandev", setvlandev), 202 /* XXX For compatibility. Should become DEF_CMD() some day. */ 203 DEF_CMD_OPTARG("-vlandev", unsetvlandev), 204 DEF_CMD("vlanmtu", IFCAP_VLAN_MTU, setifcap), 205 DEF_CMD("-vlanmtu", -IFCAP_VLAN_MTU, setifcap), 206 DEF_CMD("vlanhwtag", IFCAP_VLAN_HWTAGGING, setifcap), 207 DEF_CMD("-vlanhwtag", -IFCAP_VLAN_HWTAGGING, setifcap), 208 DEF_CMD("vlanhwfilter", IFCAP_VLAN_HWFILTER, setifcap), 209 DEF_CMD("-vlanhwfilter", -IFCAP_VLAN_HWFILTER, setifcap), 210 DEF_CMD("-vlanhwtso", -IFCAP_VLAN_HWTSO, setifcap), 211 DEF_CMD("vlanhwtso", IFCAP_VLAN_HWTSO, setifcap), 212 DEF_CMD("vlanhwcsum", IFCAP_VLAN_HWCSUM, setifcap), 213 DEF_CMD("-vlanhwcsum", -IFCAP_VLAN_HWCSUM, setifcap), 214}; 215static struct afswtch af_vlan = { 216 .af_name = "af_vlan", 217 .af_af = AF_UNSPEC, 218 .af_other_status = vlan_status, 219}; 220 221static __constructor void 222vlan_ctor(void) 223{ 224 size_t i; 225 226 for (i = 0; i < nitems(vlan_cmds); i++) 227 cmd_register(&vlan_cmds[i]); 228 af_register(&af_vlan); 229 callback_register(vlan_cb, NULL); 230 clone_setdefcallback("vlan", vlan_create); 231} 232