1/* from $OpenBSD: ifconfig.c,v 1.82 2003/10/19 05:43:35 mcbride Exp $ */ 2 3/*- 4 * SPDX-License-Identifier: BSD-2-Clause 5 * 6 * Copyright (c) 2002 Michael Shalayeff. All rights reserved. 7 * Copyright (c) 2003 Ryan McBride. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 22 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 27 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include <sys/param.h> 32#include <sys/ioctl.h> 33#include <sys/socket.h> 34#include <sys/sockio.h> 35 36#include <stdlib.h> 37#include <unistd.h> 38 39#include <net/if.h> 40#include <netinet/in.h> 41#include <netinet/in_var.h> 42#include <netinet/ip_carp.h> 43 44#include <arpa/inet.h> 45 46#include <ctype.h> 47#include <stdbool.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#include <netdb.h> 55 56#include <libifconfig.h> 57 58#include "ifconfig.h" 59 60static const char *carp_states[] = { CARP_STATES }; 61 62static void setcarp_callback(if_ctx *, void *); 63 64static int carpr_vhid = -1; 65static int carpr_advskew = -1; 66static int carpr_advbase = -1; 67static int carpr_state = -1; 68static struct in_addr carp_addr; 69static struct in6_addr carp_addr6; 70static unsigned char const *carpr_key; 71static carp_version_t carpr_version; 72static uint8_t carpr_vrrp_prio; 73static uint16_t carpr_vrrp_adv_inter; 74 75static void 76carp_status(if_ctx *ctx) 77{ 78 struct ifconfig_carp carpr[CARP_MAXVHID]; 79 char addr_buf[NI_MAXHOST]; 80 81 if (ifconfig_carp_get_info(lifh, ctx->ifname, carpr, CARP_MAXVHID) == -1) 82 return; 83 84 for (size_t i = 0; i < carpr[0].carpr_count; i++) { 85 switch (carpr[i].carpr_version) { 86 case CARP_VERSION_CARP: 87 printf("\tcarp: %s vhid %d advbase %d advskew %d", 88 carp_states[carpr[i].carpr_state], carpr[i].carpr_vhid, 89 carpr[i].carpr_advbase, carpr[i].carpr_advskew); 90 if (ctx->args->printkeys && carpr[i].carpr_key[0] != '\0') 91 printf(" key \"%s\"\n", carpr[i].carpr_key); 92 else 93 printf("\n"); 94 95 inet_ntop(AF_INET6, &carpr[i].carpr_addr6, addr_buf, 96 sizeof(addr_buf)); 97 98 printf("\t peer %s peer6 %s\n", 99 inet_ntoa(carpr[i].carpr_addr), addr_buf); 100 break; 101 case CARP_VERSION_VRRPv3: 102 printf("\tvrrp: %s vrid %d prio %d interval %d\n", 103 carp_states[carpr[i].carpr_state], carpr[i].carpr_vhid, 104 carpr[i].carpr_vrrp_prio, carpr[i].carpr_vrrp_adv_inter); 105 break; 106 } 107 } 108} 109 110static void 111setcarp_vhid(if_ctx *ctx, const char *val, int dummy __unused) 112{ 113 const struct afswtch *afp = ctx->afp; 114 115 carpr_vhid = atoi(val); 116 117 if (carpr_vhid <= 0 || carpr_vhid > CARP_MAXVHID) 118 errx(1, "vhid must be greater than 0 and less than %u", 119 CARP_MAXVHID); 120 121 if (afp->af_setvhid == NULL) 122 errx(1, "%s doesn't support carp(4)", afp->af_name); 123 afp->af_setvhid(carpr_vhid); 124 callback_register(setcarp_callback, NULL); 125} 126 127static void 128setcarp_callback(if_ctx *ctx, void *arg __unused) 129{ 130 struct ifconfig_carp carpr = { }; 131 132 if (ifconfig_carp_get_vhid(lifh, ctx->ifname, &carpr, carpr_vhid) == -1) { 133 if (ifconfig_err_errno(lifh) != ENOENT) 134 return; 135 } 136 137 carpr.carpr_vhid = carpr_vhid; 138 if (carpr_key != NULL) 139 /* XXX Should hash the password into the key here? */ 140 strlcpy(carpr.carpr_key, carpr_key, CARP_KEY_LEN); 141 if (carpr_advskew > -1) 142 carpr.carpr_advskew = carpr_advskew; 143 if (carpr_advbase > -1) 144 carpr.carpr_advbase = carpr_advbase; 145 if (carpr_state > -1) 146 carpr.carpr_state = carpr_state; 147 if (carp_addr.s_addr != INADDR_ANY) 148 carpr.carpr_addr = carp_addr; 149 if (! IN6_IS_ADDR_UNSPECIFIED(&carp_addr6)) 150 memcpy(&carpr.carpr_addr6, &carp_addr6, 151 sizeof(carp_addr6)); 152 if (carpr_version != 0) 153 carpr.carpr_version = carpr_version; 154 if (carpr_vrrp_prio != 0) 155 carpr.carpr_vrrp_prio = carpr_vrrp_prio; 156 if (carpr_vrrp_adv_inter != 0) 157 carpr.carpr_vrrp_adv_inter = carpr_vrrp_adv_inter; 158 159 if (ifconfig_carp_set_info(lifh, ctx->ifname, &carpr)) 160 err(1, "SIOCSVH"); 161} 162 163static void 164setcarp_passwd(if_ctx *ctx __unused, const char *val, int dummy __unused) 165{ 166 167 if (carpr_vhid == -1) 168 errx(1, "passwd requires vhid"); 169 170 carpr_key = val; 171} 172 173static void 174setcarp_advskew(if_ctx *ctx __unused, const char *val, int dummy __unused) 175{ 176 177 if (carpr_vhid == -1) 178 errx(1, "advskew requires vhid"); 179 180 carpr_advskew = atoi(val); 181} 182 183static void 184setcarp_advbase(if_ctx *ctx __unused, const char *val, int dummy __unused) 185{ 186 187 if (carpr_vhid == -1) 188 errx(1, "advbase requires vhid"); 189 190 carpr_advbase = atoi(val); 191} 192 193static void 194setcarp_state(if_ctx *ctx __unused, const char *val, int dummy __unused) 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 210static void 211setcarp_peer(if_ctx *ctx __unused, const char *val, int dummy __unused) 212{ 213 carp_addr.s_addr = inet_addr(val); 214} 215 216static void 217setcarp_mcast(if_ctx *ctx __unused, const char *val __unused, int dummy __unused) 218{ 219 carp_addr.s_addr = htonl(INADDR_CARP_GROUP); 220} 221 222static void 223setcarp_peer6(if_ctx *ctx __unused, const char *val, int dummy __unused) 224{ 225 struct addrinfo hints, *res; 226 227 memset(&hints, 0, sizeof(hints)); 228 hints.ai_family = AF_INET6; 229 hints.ai_flags = AI_NUMERICHOST; 230 231 if (getaddrinfo(val, NULL, &hints, &res) != 0) 232 errx(1, "Invalid IPv6 address %s", val); 233 234 memcpy(&carp_addr6, &(satosin6(res->ai_addr))->sin6_addr, sizeof(carp_addr6)); 235 freeaddrinfo(res); 236} 237 238static void 239setcarp_mcast6(if_ctx *ctx __unused, const char *val __unused, int dummy __unused) 240{ 241 bzero(&carp_addr6, sizeof(carp_addr6)); 242 carp_addr6.s6_addr[0] = 0xff; 243 carp_addr6.s6_addr[1] = 0x02; 244 carp_addr6.s6_addr[15] = 0x12; 245} 246 247static void 248setcarp_version(if_ctx *ctx __unused, const char *val, int dummy __unused) 249{ 250 carpr_version = atoi(val); 251 252 if (carpr_version != CARP_VERSION_CARP && carpr_version != CARP_VERSION_VRRPv3) 253 errx(1, "version must be %d or %d", CARP_VERSION_CARP, 254 CARP_VERSION_VRRPv3); 255} 256 257static void 258setvrrp_prio(if_ctx *ctx __unused, const char *val, int dummy __unused) 259{ 260 carpr_vrrp_prio = atoi(val); 261} 262 263static void 264setvrrp_interval(if_ctx *ctx __unused, const char *val, int dummy __unused) 265{ 266 carpr_vrrp_adv_inter = atoi(val); 267 268 if (carpr_vrrp_adv_inter == 0 || carpr_vrrp_adv_inter > VRRP_MAX_INTERVAL) 269 errx(1, "vrrpinterval must be greater than 0 and less than %d", VRRP_MAX_INTERVAL); 270} 271 272static struct cmd carp_cmds[] = { 273 DEF_CMD_ARG("advbase", setcarp_advbase), 274 DEF_CMD_ARG("advskew", setcarp_advskew), 275 DEF_CMD_ARG("pass", setcarp_passwd), 276 DEF_CMD_ARG("vhid", setcarp_vhid), 277 DEF_CMD_ARG("state", setcarp_state), 278 DEF_CMD_ARG("peer", setcarp_peer), 279 DEF_CMD("mcast", 0, setcarp_mcast), 280 DEF_CMD_ARG("peer6", setcarp_peer6), 281 DEF_CMD("mcast6", 0, setcarp_mcast6), 282 DEF_CMD_ARG("carpver", setcarp_version), 283 DEF_CMD_ARG("vrrpprio", setvrrp_prio), 284 DEF_CMD_ARG("vrrpinterval", setvrrp_interval), 285}; 286static struct afswtch af_carp = { 287 .af_name = "af_carp", 288 .af_af = AF_UNSPEC, 289 .af_other_status = carp_status, 290}; 291 292static __constructor void 293carp_ctor(void) 294{ 295 /* Default to multicast. */ 296 setcarp_mcast(NULL, NULL, 0); 297 setcarp_mcast6(NULL, NULL, 0); 298 299 for (size_t i = 0; i < nitems(carp_cmds); i++) 300 cmd_register(&carp_cmds[i]); 301 af_register(&af_carp); 302} 303