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 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 <arpa/inet.h> 46 47 #include <ctype.h> 48 #include <stdbool.h> 49 #include <stdio.h> 50 #include <string.h> 51 #include <stdlib.h> 52 #include <unistd.h> 53 #include <err.h> 54 #include <errno.h> 55 #include <netdb.h> 56 57 #include <libifconfig.h> 58 59 #include "ifconfig.h" 60 61 static const char *carp_states[] = { CARP_STATES }; 62 63 static void setcarp_callback(if_ctx *, void *); 64 65 static int carpr_vhid = -1; 66 static int carpr_advskew = -1; 67 static int carpr_advbase = -1; 68 static int carpr_state = -1; 69 static struct in_addr carp_addr; 70 static struct in6_addr carp_addr6; 71 static unsigned char const *carpr_key; 72 73 static void 74 carp_status(if_ctx *ctx) 75 { 76 struct ifconfig_carp carpr[CARP_MAXVHID]; 77 char addr_buf[NI_MAXHOST]; 78 79 if (ifconfig_carp_get_info(lifh, ctx->ifname, carpr, CARP_MAXVHID) == -1) 80 return; 81 82 for (size_t i = 0; i < carpr[0].carpr_count; i++) { 83 printf("\tcarp: %s vhid %d advbase %d advskew %d", 84 carp_states[carpr[i].carpr_state], carpr[i].carpr_vhid, 85 carpr[i].carpr_advbase, carpr[i].carpr_advskew); 86 if (ctx->args->printkeys && carpr[i].carpr_key[0] != '\0') 87 printf(" key \"%s\"\n", carpr[i].carpr_key); 88 else 89 printf("\n"); 90 91 inet_ntop(AF_INET6, &carpr[i].carpr_addr6, addr_buf, 92 sizeof(addr_buf)); 93 94 printf("\t peer %s peer6 %s\n", 95 inet_ntoa(carpr[i].carpr_addr), addr_buf); 96 } 97 } 98 99 static void 100 setcarp_vhid(if_ctx *ctx, const char *val, int dummy __unused) 101 { 102 const struct afswtch *afp = ctx->afp; 103 104 carpr_vhid = atoi(val); 105 106 if (carpr_vhid <= 0 || carpr_vhid > CARP_MAXVHID) 107 errx(1, "vhid must be greater than 0 and less than %u", 108 CARP_MAXVHID); 109 110 if (afp->af_setvhid == NULL) 111 errx(1, "%s doesn't support carp(4)", afp->af_name); 112 afp->af_setvhid(carpr_vhid); 113 callback_register(setcarp_callback, NULL); 114 } 115 116 static void 117 setcarp_callback(if_ctx *ctx, void *arg __unused) 118 { 119 struct ifconfig_carp carpr = { }; 120 121 if (ifconfig_carp_get_vhid(lifh, ctx->ifname, &carpr, carpr_vhid) == -1) { 122 if (ifconfig_err_errno(lifh) != ENOENT) 123 return; 124 } 125 126 carpr.carpr_vhid = carpr_vhid; 127 if (carpr_key != NULL) 128 /* XXX Should hash the password into the key here? */ 129 strlcpy(carpr.carpr_key, carpr_key, CARP_KEY_LEN); 130 if (carpr_advskew > -1) 131 carpr.carpr_advskew = carpr_advskew; 132 if (carpr_advbase > -1) 133 carpr.carpr_advbase = carpr_advbase; 134 if (carpr_state > -1) 135 carpr.carpr_state = carpr_state; 136 if (carp_addr.s_addr != INADDR_ANY) 137 carpr.carpr_addr = carp_addr; 138 if (! IN6_IS_ADDR_UNSPECIFIED(&carp_addr6)) 139 memcpy(&carpr.carpr_addr6, &carp_addr6, 140 sizeof(carp_addr6)); 141 142 if (ifconfig_carp_set_info(lifh, ctx->ifname, &carpr)) 143 err(1, "SIOCSVH"); 144 } 145 146 static void 147 setcarp_passwd(if_ctx *ctx __unused, const char *val, int dummy __unused) 148 { 149 150 if (carpr_vhid == -1) 151 errx(1, "passwd requires vhid"); 152 153 carpr_key = val; 154 } 155 156 static void 157 setcarp_advskew(if_ctx *ctx __unused, const char *val, int dummy __unused) 158 { 159 160 if (carpr_vhid == -1) 161 errx(1, "advskew requires vhid"); 162 163 carpr_advskew = atoi(val); 164 } 165 166 static void 167 setcarp_advbase(if_ctx *ctx __unused, const char *val, int dummy __unused) 168 { 169 170 if (carpr_vhid == -1) 171 errx(1, "advbase requires vhid"); 172 173 carpr_advbase = atoi(val); 174 } 175 176 static void 177 setcarp_state(if_ctx *ctx __unused, const char *val, int dummy __unused) 178 { 179 int i; 180 181 if (carpr_vhid == -1) 182 errx(1, "state requires vhid"); 183 184 for (i = 0; i <= CARP_MAXSTATE; i++) 185 if (strcasecmp(carp_states[i], val) == 0) { 186 carpr_state = i; 187 return; 188 } 189 190 errx(1, "unknown state"); 191 } 192 193 static void 194 setcarp_peer(if_ctx *ctx __unused, const char *val, int dummy __unused) 195 { 196 carp_addr.s_addr = inet_addr(val); 197 } 198 199 static void 200 setcarp_mcast(if_ctx *ctx __unused, const char *val __unused, int dummy __unused) 201 { 202 carp_addr.s_addr = htonl(INADDR_CARP_GROUP); 203 } 204 205 static void 206 setcarp_peer6(if_ctx *ctx __unused, const char *val, int dummy __unused) 207 { 208 struct addrinfo hints, *res; 209 210 memset(&hints, 0, sizeof(hints)); 211 hints.ai_family = AF_INET6; 212 hints.ai_flags = AI_NUMERICHOST; 213 214 if (getaddrinfo(val, NULL, &hints, &res) != 0) 215 errx(1, "Invalid IPv6 address %s", val); 216 217 memcpy(&carp_addr6, &(satosin6(res->ai_addr))->sin6_addr, sizeof(carp_addr6)); 218 freeaddrinfo(res); 219 } 220 221 static void 222 setcarp_mcast6(if_ctx *ctx __unused, const char *val __unused, int dummy __unused) 223 { 224 bzero(&carp_addr6, sizeof(carp_addr6)); 225 carp_addr6.s6_addr[0] = 0xff; 226 carp_addr6.s6_addr[1] = 0x02; 227 carp_addr6.s6_addr[15] = 0x12; 228 } 229 230 static struct cmd carp_cmds[] = { 231 DEF_CMD_ARG("advbase", setcarp_advbase), 232 DEF_CMD_ARG("advskew", setcarp_advskew), 233 DEF_CMD_ARG("pass", setcarp_passwd), 234 DEF_CMD_ARG("vhid", setcarp_vhid), 235 DEF_CMD_ARG("state", setcarp_state), 236 DEF_CMD_ARG("peer", setcarp_peer), 237 DEF_CMD("mcast", 0, setcarp_mcast), 238 DEF_CMD_ARG("peer6", setcarp_peer6), 239 DEF_CMD("mcast6", 0, setcarp_mcast6), 240 }; 241 static struct afswtch af_carp = { 242 .af_name = "af_carp", 243 .af_af = AF_UNSPEC, 244 .af_other_status = carp_status, 245 }; 246 247 static __constructor void 248 carp_ctor(void) 249 { 250 /* Default to multicast. */ 251 setcarp_mcast(NULL, NULL, 0); 252 setcarp_mcast6(NULL, NULL, 0); 253 254 for (size_t i = 0; i < nitems(carp_cmds); i++) 255 cmd_register(&carp_cmds[i]); 256 af_register(&af_carp); 257 } 258