1 /* $FreeBSD$ */ 2 /* from $OpenBSD: ifconfig.c,v 1.82 2003/10/19 05:43:35 mcbride Exp $ */ 3 4 /*- 5 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 6 * 7 * Copyright (c) 2002 Michael Shalayeff. All rights reserved. 8 * Copyright (c) 2003 Ryan McBride. All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 23 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 25 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 27 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 28 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 29 * THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 #include <sys/ioctl.h> 34 #include <sys/socket.h> 35 #include <sys/sockio.h> 36 37 #include <stdlib.h> 38 #include <unistd.h> 39 40 #include <net/if.h> 41 #include <netinet/in.h> 42 #include <netinet/in_var.h> 43 #include <netinet/ip_carp.h> 44 45 #include <ctype.h> 46 #include <stdio.h> 47 #include <string.h> 48 #include <stdlib.h> 49 #include <unistd.h> 50 #include <err.h> 51 #include <errno.h> 52 53 #include <libifconfig.h> 54 55 #include "ifconfig.h" 56 57 static const char *carp_states[] = { CARP_STATES }; 58 59 static void carp_status(int s); 60 static void setcarp_vhid(const char *, int, int, const struct afswtch *rafp); 61 static void setcarp_callback(int, void *); 62 static void setcarp_advbase(const char *,int, int, const struct afswtch *rafp); 63 static void setcarp_advskew(const char *, int, int, const struct afswtch *rafp); 64 static void setcarp_passwd(const char *, int, int, const struct afswtch *rafp); 65 66 static int carpr_vhid = -1; 67 static int carpr_advskew = -1; 68 static int carpr_advbase = -1; 69 static int carpr_state = -1; 70 static unsigned char const *carpr_key; 71 72 static void 73 carp_status(int s) 74 { 75 struct carpreq carpr[CARP_MAXVHID]; 76 ifconfig_handle_t *lifh; 77 78 lifh = ifconfig_open(); 79 if (lifh == NULL) 80 return; 81 82 if (ifconfig_carp_get_info(lifh, name, carpr, CARP_MAXVHID) == -1) 83 goto close; 84 85 for (size_t i = 0; i < carpr[0].carpr_count; i++) { 86 printf("\tcarp: %s vhid %d advbase %d advskew %d", 87 carp_states[carpr[i].carpr_state], carpr[i].carpr_vhid, 88 carpr[i].carpr_advbase, carpr[i].carpr_advskew); 89 if (printkeys && carpr[i].carpr_key[0] != '\0') 90 printf(" key \"%s\"\n", carpr[i].carpr_key); 91 else 92 printf("\n"); 93 } 94 close: 95 ifconfig_close(lifh); 96 } 97 98 static void 99 setcarp_vhid(const char *val, int d, int s, const struct afswtch *afp) 100 { 101 102 carpr_vhid = atoi(val); 103 104 if (carpr_vhid <= 0 || carpr_vhid > CARP_MAXVHID) 105 errx(1, "vhid must be greater than 0 and less than %u", 106 CARP_MAXVHID); 107 108 switch (afp->af_af) { 109 #ifdef INET 110 case AF_INET: 111 { 112 struct in_aliasreq *ifra; 113 114 ifra = (struct in_aliasreq *)afp->af_addreq; 115 ifra->ifra_vhid = carpr_vhid; 116 break; 117 } 118 #endif 119 #ifdef INET6 120 case AF_INET6: 121 { 122 struct in6_aliasreq *ifra; 123 124 ifra = (struct in6_aliasreq *)afp->af_addreq; 125 ifra->ifra_vhid = carpr_vhid; 126 break; 127 } 128 #endif 129 default: 130 errx(1, "%s doesn't support carp(4)", afp->af_name); 131 } 132 133 callback_register(setcarp_callback, NULL); 134 } 135 136 static void 137 setcarp_callback(int s, void *arg __unused) 138 { 139 struct carpreq carpr; 140 141 bzero(&carpr, sizeof(struct carpreq)); 142 carpr.carpr_vhid = carpr_vhid; 143 carpr.carpr_count = 1; 144 ifr.ifr_data = (caddr_t)&carpr; 145 146 if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1 && errno != ENOENT) 147 err(1, "SIOCGVH"); 148 149 if (carpr_key != NULL) 150 /* XXX Should hash the password into the key here? */ 151 strlcpy(carpr.carpr_key, carpr_key, CARP_KEY_LEN); 152 if (carpr_advskew > -1) 153 carpr.carpr_advskew = carpr_advskew; 154 if (carpr_advbase > -1) 155 carpr.carpr_advbase = carpr_advbase; 156 if (carpr_state > -1) 157 carpr.carpr_state = carpr_state; 158 159 if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1) 160 err(1, "SIOCSVH"); 161 } 162 163 static void 164 setcarp_passwd(const char *val, int d, int s, const struct afswtch *afp) 165 { 166 167 if (carpr_vhid == -1) 168 errx(1, "passwd requires vhid"); 169 170 carpr_key = val; 171 } 172 173 static void 174 setcarp_advskew(const char *val, int d, int s, const struct afswtch *afp) 175 { 176 177 if (carpr_vhid == -1) 178 errx(1, "advskew requires vhid"); 179 180 carpr_advskew = atoi(val); 181 } 182 183 static void 184 setcarp_advbase(const char *val, int d, int s, const struct afswtch *afp) 185 { 186 187 if (carpr_vhid == -1) 188 errx(1, "advbase requires vhid"); 189 190 carpr_advbase = atoi(val); 191 } 192 193 static void 194 setcarp_state(const char *val, int d, int s, const struct afswtch *afp) 195 { 196 int i; 197 198 if (carpr_vhid == -1) 199 errx(1, "state requires vhid"); 200 201 for (i = 0; i <= CARP_MAXSTATE; i++) 202 if (strcasecmp(carp_states[i], val) == 0) { 203 carpr_state = i; 204 return; 205 } 206 207 errx(1, "unknown state"); 208 } 209 210 static struct cmd carp_cmds[] = { 211 DEF_CMD_ARG("advbase", setcarp_advbase), 212 DEF_CMD_ARG("advskew", setcarp_advskew), 213 DEF_CMD_ARG("pass", setcarp_passwd), 214 DEF_CMD_ARG("vhid", setcarp_vhid), 215 DEF_CMD_ARG("state", setcarp_state), 216 }; 217 static struct afswtch af_carp = { 218 .af_name = "af_carp", 219 .af_af = AF_UNSPEC, 220 .af_other_status = carp_status, 221 }; 222 223 static __constructor void 224 carp_ctor(void) 225 { 226 int i; 227 228 for (i = 0; i < nitems(carp_cmds); i++) 229 cmd_register(&carp_cmds[i]); 230 af_register(&af_carp); 231 } 232