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