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 * $FreeBSD: src/sbin/ifconfig/ifvlan.c,v 1.7.2.4 2006/02/09 10:48:43 yar Exp $ 33 */ 34 35 #include <sys/param.h> 36 #include <sys/ioctl.h> 37 #include <sys/socket.h> 38 #include <sys/sockio.h> 39 40 #include <stdlib.h> 41 #include <unistd.h> 42 43 #include <net/ethernet.h> 44 #include <net/if.h> 45 #include <net/if_var.h> 46 #include <net/vlan/if_vlan_var.h> 47 #include <net/route.h> 48 49 #include <ctype.h> 50 #include <stdio.h> 51 #include <string.h> 52 #include <stdlib.h> 53 #include <unistd.h> 54 #include <err.h> 55 #include <errno.h> 56 57 #include "ifconfig.h" 58 59 static struct vlanreq __vreq; 60 static int __have_dev = 0; 61 static int __have_tag = 0; 62 63 static void 64 vlan_status(int s) 65 { 66 struct vlanreq vreq; 67 68 bzero((char *)&vreq, sizeof(vreq)); 69 ifr.ifr_data = (caddr_t)&vreq; 70 71 if (ioctl(s, SIOCGETVLAN, (caddr_t)&ifr) == -1) 72 return; 73 74 printf("\tvlan: %d parent interface: %s\n", 75 vreq.vlr_tag, vreq.vlr_parent[0] == '\0' ? 76 "<none>" : vreq.vlr_parent); 77 } 78 79 static void 80 setvlantag(const char *val, int d, int s, const struct afswtch *afp) 81 { 82 char *endp; 83 u_long ul; 84 85 ul = strtoul(val, &endp, 0); 86 if (*endp != '\0') 87 errx(1, "invalid value for vlan"); 88 __vreq.vlr_tag = ul; 89 /* check if the value can be represented in vlr_tag */ 90 if (__vreq.vlr_tag != ul) 91 errx(1, "value for vlan out of range"); 92 /* the kernel will do more specific checks on vlr_tag */ 93 __have_tag = 1; 94 } 95 96 static void 97 setvlandev(const char *val, int d, int s, const struct afswtch *afp) 98 { 99 100 strncpy(__vreq.vlr_parent, val, sizeof(__vreq.vlr_parent)); 101 __have_dev = 1; 102 } 103 104 static void 105 unsetvlandev(const char *val, int d, int s, const struct afswtch *afp) 106 { 107 108 if (val != NULL) 109 warnx("argument to -vlandev is useless and hence deprecated"); 110 111 bzero((char *)&__vreq, sizeof(__vreq)); 112 ifr.ifr_data = (caddr_t)&__vreq; 113 #if 0 /* this code will be of use when we can alter vlan or vlandev only */ 114 if (ioctl(s, SIOCGETVLAN, (caddr_t)&ifr) == -1) 115 err(1, "SIOCGETVLAN"); 116 117 bzero((char *)&__vreq.vlr_parent, sizeof(__vreq.vlr_parent)); 118 __vreq.vlr_tag = 0; /* XXX clear parent only (no kernel support now) */ 119 #endif 120 if (ioctl(s, SIOCSETVLAN, (caddr_t)&ifr) == -1) 121 err(1, "SIOCSETVLAN"); 122 __have_dev = __have_tag = 0; 123 } 124 125 static void 126 vlan_cb(int s, void *arg) 127 { 128 129 if (__have_tag ^ __have_dev) 130 errx(1, "both vlan and vlandev must be specified"); 131 132 if (__have_tag && __have_dev) { 133 ifr.ifr_data = (caddr_t)&__vreq; 134 if (ioctl(s, SIOCSETVLAN, (caddr_t)&ifr) == -1) 135 err(1, "SIOCSETVLAN"); 136 } 137 } 138 139 static struct cmd vlan_cmds[] = { 140 DEF_CMD_ARG("vlan", setvlantag), 141 DEF_CMD_ARG("vlandev", setvlandev), 142 /* XXX For compatibility. Should become DEF_CMD() some day. */ 143 DEF_CMD_OPTARG("-vlandev", unsetvlandev), 144 DEF_CMD("vlanmtu", IFCAP_VLAN_MTU, setifcap), 145 DEF_CMD("-vlanmtu", -IFCAP_VLAN_MTU, setifcap), 146 DEF_CMD("vlanhwtag", IFCAP_VLAN_HWTAGGING, setifcap), 147 DEF_CMD("-vlanhwtag", -IFCAP_VLAN_HWTAGGING, setifcap), 148 }; 149 static struct afswtch af_vlan = { 150 .af_name = "af_vlan", 151 .af_af = AF_UNSPEC, 152 .af_other_status = vlan_status, 153 }; 154 155 static __constructor(101) void 156 vlan_ctor(void) 157 { 158 #define N(a) (sizeof(a) / sizeof(a[0])) 159 int i; 160 161 for (i = 0; i < N(vlan_cmds); i++) 162 cmd_register(&vlan_cmds[i]); 163 af_register(&af_vlan); 164 callback_register(vlan_cb, NULL); 165 #undef N 166 } 167