1 /* $FreeBSD$ */ 2 /* from $OpenBSD: ifconfig.c,v 1.82 2003/10/19 05:43:35 mcbride Exp $ */ 3 4 /* 5 * Copyright (c) 2002 Michael Shalayeff. All rights reserved. 6 * Copyright (c) 2003 Ryan McBride. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 23 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 26 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27 * THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/param.h> 31 #include <sys/ioctl.h> 32 #include <sys/socket.h> 33 #include <sys/sockio.h> 34 35 #include <stdlib.h> 36 #include <unistd.h> 37 38 #include <net/if.h> 39 #include <netinet/in.h> 40 #include <netinet/in_var.h> 41 #include <netinet/ip_carp.h> 42 43 #include <netinet6/in6_var.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 "ifconfig.h" 54 55 static const char *carp_states[] = { CARP_STATES }; 56 57 static void carp_status(int s); 58 static void setcarp_vhid(const char *, int, int, const struct afswtch *rafp); 59 static void setcarp_callback(int, void *); 60 static void setcarp_advbase(const char *,int, int, const struct afswtch *rafp); 61 static void setcarp_advskew(const char *, int, int, const struct afswtch *rafp); 62 static void setcarp_passwd(const char *, int, int, const struct afswtch *rafp); 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 unsigned char const *carpr_key; 69 70 static void 71 carp_status(int s) 72 { 73 struct carpreq carpr[CARP_MAXVHID]; 74 int i; 75 76 bzero(carpr, sizeof(struct carpreq) * CARP_MAXVHID); 77 carpr[0].carpr_count = CARP_MAXVHID; 78 ifr.ifr_data = (caddr_t)&carpr; 79 80 #ifndef FSTACK 81 if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1) 82 #else 83 size_t offset = (char *)&(ifr.ifr_data) - (char *)&(ifr); 84 size_t clen = sizeof(struct carpreq) * CARP_MAXVHID; 85 if (ioctl_va(s, SIOCGVH, (caddr_t)&ifr, 3, offset, ifr.ifr_data, clen) == -1) 86 #endif 87 return; 88 89 for (i = 0; i < carpr[0].carpr_count; i++) { 90 printf("\tcarp: %s vhid %d advbase %d advskew %d", 91 carp_states[carpr[i].carpr_state], carpr[i].carpr_vhid, 92 carpr[i].carpr_advbase, carpr[i].carpr_advskew); 93 if (printkeys && carpr[i].carpr_key[0] != '\0') 94 printf(" key \"%s\"\n", carpr[i].carpr_key); 95 else 96 printf("\n"); 97 } 98 } 99 100 static void 101 setcarp_vhid(const char *val, int d, int s, const struct afswtch *afp) 102 { 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 switch (afp->af_af) { 111 #ifdef INET 112 case AF_INET: 113 { 114 struct in_aliasreq *ifra; 115 116 ifra = (struct in_aliasreq *)afp->af_addreq; 117 ifra->ifra_vhid = carpr_vhid; 118 break; 119 } 120 #endif 121 #ifdef INET6 122 case AF_INET6: 123 { 124 struct in6_aliasreq *ifra; 125 126 ifra = (struct in6_aliasreq *)afp->af_addreq; 127 ifra->ifra_vhid = carpr_vhid; 128 break; 129 } 130 #endif 131 default: 132 errx(1, "%s doesn't support carp(4)", afp->af_name); 133 } 134 135 callback_register(setcarp_callback, NULL); 136 } 137 138 static void 139 setcarp_callback(int s, void *arg __unused) 140 { 141 struct carpreq carpr; 142 143 bzero(&carpr, sizeof(struct carpreq)); 144 carpr.carpr_vhid = carpr_vhid; 145 carpr.carpr_count = 1; 146 ifr.ifr_data = (caddr_t)&carpr; 147 148 #ifndef FSTACK 149 if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1 && errno != ENOENT) 150 #else 151 size_t offset, clen; 152 offset = (char *)&(ifr.ifr_data) - (char *)&(ifr); 153 clen = sizeof(carpr); 154 if (ioctl_va(s, SIOCGVH, (caddr_t)&ifr, 3, offset, ifr.ifr_data, clen) == -1 155 && errno != ENOENT) 156 #endif 157 err(1, "SIOCGVH"); 158 159 if (carpr_key != NULL) 160 /* XXX Should hash the password into the key here? */ 161 #ifndef FSTACK 162 strlcpy(carpr.carpr_key, carpr_key, CARP_KEY_LEN); 163 #else 164 strlcpy((char *)carpr.carpr_key, (const char *)carpr_key, CARP_KEY_LEN); 165 #endif 166 if (carpr_advskew > -1) 167 carpr.carpr_advskew = carpr_advskew; 168 if (carpr_advbase > -1) 169 carpr.carpr_advbase = carpr_advbase; 170 if (carpr_state > -1) 171 carpr.carpr_state = carpr_state; 172 173 #ifndef FSTACK 174 if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1) 175 #else 176 if (ioctl_va(s, SIOCSVH, (caddr_t)&ifr, 3, offset, ifr.ifr_data, clen) == -1) 177 #endif 178 err(1, "SIOCSVH"); 179 } 180 181 static void 182 setcarp_passwd(const char *val, int d, int s, const struct afswtch *afp) 183 { 184 185 if (carpr_vhid == -1) 186 errx(1, "passwd requires vhid"); 187 188 #ifndef FSTACK 189 carpr_key = val; 190 #else 191 carpr_key = (const unsigned char *)val; 192 #endif 193 } 194 195 static void 196 setcarp_advskew(const char *val, int d, int s, const struct afswtch *afp) 197 { 198 199 if (carpr_vhid == -1) 200 errx(1, "advskew requires vhid"); 201 202 carpr_advskew = atoi(val); 203 } 204 205 static void 206 setcarp_advbase(const char *val, int d, int s, const struct afswtch *afp) 207 { 208 209 if (carpr_vhid == -1) 210 errx(1, "advbase requires vhid"); 211 212 carpr_advbase = atoi(val); 213 } 214 215 static void 216 setcarp_state(const char *val, int d, int s, const struct afswtch *afp) 217 { 218 int i; 219 220 if (carpr_vhid == -1) 221 errx(1, "state requires vhid"); 222 223 for (i = 0; i <= CARP_MAXSTATE; i++) 224 if (strcasecmp(carp_states[i], val) == 0) { 225 carpr_state = i; 226 return; 227 } 228 229 errx(1, "unknown state"); 230 } 231 232 static struct cmd carp_cmds[] = { 233 DEF_CMD_ARG("advbase", setcarp_advbase), 234 DEF_CMD_ARG("advskew", setcarp_advskew), 235 DEF_CMD_ARG("pass", setcarp_passwd), 236 DEF_CMD_ARG("vhid", setcarp_vhid), 237 DEF_CMD_ARG("state", setcarp_state), 238 }; 239 static struct afswtch af_carp = { 240 .af_name = "af_carp", 241 .af_af = AF_UNSPEC, 242 .af_other_status = carp_status, 243 }; 244 245 static __constructor void 246 carp_ctor(void) 247 { 248 int i; 249 250 for (i = 0; i < nitems(carp_cmds); i++) 251 cmd_register(&carp_cmds[i]); 252 af_register(&af_carp); 253 } 254