1 /* $NetBSD: vlan.c,v 1.16 2021/06/21 03:14:40 christos 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 1.16 2021/06/21 03:14:40 christos 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 56 static status_func_t status; 57 static usage_func_t usage; 58 static cmdloop_branch_t branch; 59 60 static void vlan_constructor(void) __attribute__((constructor)); 61 static void vlan_status(prop_dictionary_t, prop_dictionary_t); 62 63 static int setvlan(prop_dictionary_t, prop_dictionary_t); 64 static int setvlanif(prop_dictionary_t, prop_dictionary_t); 65 66 struct pinteger vlantag = PINTEGER_INITIALIZER1(&vlantag, "VLAN tag", 67 0, USHRT_MAX, 10, setvlan, "vlantag", &command_root.pb_parser); 68 69 struct piface vlanif = PIFACE_INITIALIZER(&vlanif, "vlanif", setvlanif, 70 "vlanif", &command_root.pb_parser); 71 72 static const struct kwinst vlankw[] = { 73 {.k_word = "vlan", .k_nextparser = &vlantag.pi_parser} 74 , {.k_word = "vlanif", .k_act = "vlantag", 75 .k_nextparser = &vlanif.pif_parser} 76 , {.k_word = "-vlanif", .k_key = "vlanif", .k_type = KW_T_STR, 77 .k_str = "", .k_exec = setvlanif} 78 }; 79 80 struct pkw vlan = PKW_INITIALIZER(&vlan, "vlan", NULL, NULL, 81 vlankw, __arraycount(vlankw), NULL); 82 83 static int 84 checkifname(prop_dictionary_t env) 85 { 86 const char *ifname; 87 88 if ((ifname = getifname(env)) == NULL) 89 return 1; 90 91 return strncmp(ifname, "vlan", 4) != 0 || 92 !isdigit((unsigned char)ifname[4]); 93 } 94 95 static int 96 getvlan(prop_dictionary_t env, struct vlanreq *vlr, bool quiet) 97 { 98 memset(vlr, 0, sizeof(*vlr)); 99 100 if (checkifname(env)) { 101 if (quiet) 102 return -1; 103 errx(EXIT_FAILURE, "valid only with vlan(4) interfaces"); 104 } 105 106 if (indirect_ioctl(env, SIOCGETVLAN, vlr) == -1) 107 return -1; 108 109 return 0; 110 } 111 112 int 113 setvlan(prop_dictionary_t env, prop_dictionary_t oenv) 114 { 115 struct vlanreq vlr; 116 int64_t tag; 117 118 if (getvlan(env, &vlr, false) == -1) 119 err(EXIT_FAILURE, "%s: getvlan", __func__); 120 121 if (!prop_dictionary_get_int64(env, "vlantag", &tag)) { 122 errno = ENOENT; 123 return -1; 124 } 125 126 vlr.vlr_tag = tag; 127 128 if (indirect_ioctl(env, SIOCSETVLAN, &vlr) == -1) 129 err(EXIT_FAILURE, "SIOCSETVLAN"); 130 return 0; 131 } 132 133 int 134 setvlanif(prop_dictionary_t env, prop_dictionary_t oenv) 135 { 136 struct vlanreq vlr; 137 const char *parent; 138 int64_t tag; 139 140 if (getvlan(env, &vlr, false) == -1) 141 err(EXIT_FAILURE, "%s: getsock", __func__); 142 143 if (!prop_dictionary_get_string(env, "vlanif", &parent)) { 144 errno = ENOENT; 145 return -1; 146 } 147 strlcpy(vlr.vlr_parent, parent, sizeof(vlr.vlr_parent)); 148 if (strcmp(parent, "") == 0) 149 ; 150 else if (!prop_dictionary_get_int64(env, "vlantag", &tag)) { 151 errno = ENOENT; 152 return -1; 153 } else 154 vlr.vlr_tag = (unsigned short)tag; 155 156 if (indirect_ioctl(env, SIOCSETVLAN, &vlr) == -1) 157 err(EXIT_FAILURE, "SIOCSETVLAN"); 158 return 0; 159 } 160 161 static void 162 vlan_status(prop_dictionary_t env, prop_dictionary_t oenv) 163 { 164 struct vlanreq vlr; 165 166 if (getvlan(env, &vlr, true) == -1) 167 return; 168 169 if (vlr.vlr_tag || vlr.vlr_parent[0] != '\0') 170 printf("\tvlan: %d parent: %s\n", 171 vlr.vlr_tag, vlr.vlr_parent[0] == '\0' ? 172 "<none>" : vlr.vlr_parent); 173 } 174 175 static void 176 vlan_usage(prop_dictionary_t env) 177 { 178 fprintf(stderr, "\t[ vlan n vlanif i ] [ -vlanif i ]\n"); 179 } 180 181 static void 182 vlan_constructor(void) 183 { 184 cmdloop_branch_init(&branch, &vlan.pk_parser); 185 register_cmdloop_branch(&branch); 186 status_func_init(&status, vlan_status); 187 usage_func_init(&usage, vlan_usage); 188 register_status(&status); 189 register_usage(&usage); 190 } 191
Indexes created Sat Sep 20 22:09:52 GMT 2025