ifvlan.c revision 177799
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#ifndef lint 58static const char rcsid[] = 59 "$FreeBSD: head/sbin/ifconfig/ifvlan.c 177799 2008-03-31 15:38:07Z sam $"; 60#endif 61 62#define NOTAG ((u_short) -1) 63 64static struct vlanreq params = { 65 .vlr_tag = NOTAG, 66}; 67 68static int 69getvlan(int s, struct ifreq *ifr, struct vlanreq *vreq) 70{ 71 bzero((char *)vreq, sizeof(*vreq)); 72 ifr->ifr_data = (caddr_t)vreq; 73 74 return ioctl(s, SIOCGETVLAN, (caddr_t)ifr); 75} 76 77static void 78vlan_status(int s) 79{ 80 struct vlanreq vreq; 81 82 if (getvlan(s, &ifr, &vreq) != -1) 83 printf("\tvlan: %d parent interface: %s\n", 84 vreq.vlr_tag, vreq.vlr_parent[0] == '\0' ? 85 "<none>" : vreq.vlr_parent); 86} 87 88static void 89vlan_create(int s, struct ifreq *ifr) 90{ 91 if (params.vlr_tag != NOTAG || params.vlr_parent[0] != '\0') { 92 /* 93 * One or both parameters were specified, make sure both. 94 */ 95 if (params.vlr_tag == NOTAG) 96 errx(1, "must specify a tag for vlan create"); 97 if (params.vlr_parent[0] == '\0') 98 errx(1, "must specify a parent device for vlan create"); 99 ifr->ifr_data = (caddr_t) ¶ms; 100 } 101 if (ioctl(s, SIOCIFCREATE2, ifr) < 0) 102 err(1, "SIOCIFCREATE2"); 103} 104 105static void 106vlan_cb(int s, void *arg) 107{ 108 if ((params.vlr_tag != NOTAG) ^ (params.vlr_parent[0] != '\0')) 109 errx(1, "both vlan and vlandev must be specified"); 110} 111 112static void 113vlan_set(int s, struct ifreq *ifr) 114{ 115 if (params.vlr_tag != NOTAG && params.vlr_parent[0] != '\0') { 116 ifr->ifr_data = (caddr_t) ¶ms; 117 if (ioctl(s, SIOCSETVLAN, (caddr_t)ifr) == -1) 118 err(1, "SIOCSETVLAN"); 119 } 120} 121 122static 123DECL_CMD_FUNC(setvlantag, val, d) 124{ 125 struct vlanreq vreq; 126 u_long ul; 127 char *endp; 128 129 ul = strtoul(val, &endp, 0); 130 if (*endp != '\0') 131 errx(1, "invalid value for vlan"); 132 params.vlr_tag = ul; 133 /* check if the value can be represented in vlr_tag */ 134 if (params.vlr_tag != ul) 135 errx(1, "value for vlan out of range"); 136 137 if (getvlan(s, &ifr, &vreq) != -1) 138 vlan_set(s, &ifr); 139 else 140 clone_setcallback(vlan_create); 141} 142 143static 144DECL_CMD_FUNC(setvlandev, val, d) 145{ 146 struct vlanreq vreq; 147 148 strlcpy(params.vlr_parent, val, sizeof(params.vlr_parent)); 149 150 if (getvlan(s, &ifr, &vreq) != -1) 151 vlan_set(s, &ifr); 152 else 153 clone_setcallback(vlan_create); 154} 155 156static 157DECL_CMD_FUNC(unsetvlandev, val, d) 158{ 159 struct vlanreq vreq; 160 161 bzero((char *)&vreq, sizeof(struct vlanreq)); 162 ifr.ifr_data = (caddr_t)&vreq; 163 164 if (ioctl(s, SIOCGETVLAN, (caddr_t)&ifr) == -1) 165 err(1, "SIOCGETVLAN"); 166 167 bzero((char *)&vreq.vlr_parent, sizeof(vreq.vlr_parent)); 168 vreq.vlr_tag = 0; 169 170 if (ioctl(s, SIOCSETVLAN, (caddr_t)&ifr) == -1) 171 err(1, "SIOCSETVLAN"); 172} 173 174static struct cmd vlan_cmds[] = { 175 DEF_CLONE_CMD_ARG("vlan", setvlantag), 176 DEF_CLONE_CMD_ARG("vlandev", setvlandev), 177 /* XXX For compatibility. Should become DEF_CMD() some day. */ 178 DEF_CMD_OPTARG("-vlandev", unsetvlandev), 179 DEF_CMD("vlanmtu", IFCAP_VLAN_MTU, setifcap), 180 DEF_CMD("-vlanmtu", -IFCAP_VLAN_MTU, setifcap), 181 DEF_CMD("vlanhwtag", IFCAP_VLAN_HWTAGGING, setifcap), 182 DEF_CMD("-vlanhwtag", -IFCAP_VLAN_HWTAGGING, setifcap), 183}; 184static struct afswtch af_vlan = { 185 .af_name = "af_vlan", 186 .af_af = AF_UNSPEC, 187 .af_other_status = vlan_status, 188}; 189 190static __constructor void 191vlan_ctor(void) 192{ 193#define N(a) (sizeof(a) / sizeof(a[0])) 194 int i; 195 196 for (i = 0; i < N(vlan_cmds); i++) 197 cmd_register(&vlan_cmds[i]); 198 af_register(&af_vlan); 199 callback_register(vlan_cb, NULL); 200#undef N 201} 202