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 <ctype.h> 44 #include <stdio.h> 45 #include <string.h> 46 #include <stdlib.h> 47 #include <unistd.h> 48 #include <err.h> 49 #include <errno.h> 50 51 #include "ifconfig.h" 52 53 static const char *carp_states[] = { CARP_STATES }; 54 55 static void carp_status(int s); 56 static void setcarp_vhid(const char *, int, int, const struct afswtch *rafp); 57 static void setcarp_callback(int, void *); 58 static void setcarp_advbase(const char *,int, int, const struct afswtch *rafp); 59 static void setcarp_advskew(const char *, int, int, const struct afswtch *rafp); 60 static void setcarp_passwd(const char *, int, int, const struct afswtch *rafp); 61 62 static int carpr_vhid = -1; 63 static int carpr_advskew = -1; 64 static int carpr_advbase = -1; 65 static int carpr_state = -1; 66 static unsigned char const *carpr_key; 67 68 static void 69 carp_status(int s) 70 { 71 struct carpreq carpr[CARP_MAXVHID]; 72 int i; 73 74 bzero(carpr, sizeof(struct carpreq) * CARP_MAXVHID); 75 carpr[0].carpr_count = CARP_MAXVHID; 76 ifr.ifr_data = (caddr_t)&carpr; 77 78 if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1) 79 return; 80 81 for (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 (printkeys && carpr[i].carpr_key[0] != '\0') 86 printf(" key \"%s\"\n", carpr[i].carpr_key); 87 else 88 printf("\n"); 89 } 90 } 91 92 static void 93 setcarp_vhid(const char *val, int d, int s, const struct afswtch *afp) 94 { 95 96 carpr_vhid = atoi(val); 97 98 if (carpr_vhid <= 0 || carpr_vhid > CARP_MAXVHID) 99 errx(1, "vhid must be greater than 0 and less than %u", 100 CARP_MAXVHID); 101 102 switch (afp->af_af) { 103 #ifdef INET 104 case AF_INET: 105 { 106 struct in_aliasreq *ifra; 107 108 ifra = (struct in_aliasreq *)afp->af_addreq; 109 ifra->ifra_vhid = carpr_vhid; 110 break; 111 } 112 #endif 113 #ifdef INET6 114 case AF_INET6: 115 { 116 struct in6_aliasreq *ifra; 117 118 ifra = (struct in6_aliasreq *)afp->af_addreq; 119 ifra->ifra_vhid = carpr_vhid; 120 break; 121 } 122 #endif 123 default: 124 errx(1, "%s doesn't support carp(4)", afp->af_name); 125 } 126 127 callback_register(setcarp_callback, NULL); 128 } 129 130 static void 131 setcarp_callback(int s, void *arg __unused) 132 { 133 struct carpreq carpr; 134 135 bzero(&carpr, sizeof(struct carpreq)); 136 carpr.carpr_vhid = carpr_vhid; 137 carpr.carpr_count = 1; 138 ifr.ifr_data = (caddr_t)&carpr; 139 140 if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1 && errno != ENOENT) 141 err(1, "SIOCGVH"); 142 143 if (carpr_key != NULL) 144 /* XXX Should hash the password into the key here? */ 145 strlcpy(carpr.carpr_key, carpr_key, CARP_KEY_LEN); 146 if (carpr_advskew > -1) 147 carpr.carpr_advskew = carpr_advskew; 148 if (carpr_advbase > -1) 149 carpr.carpr_advbase = carpr_advbase; 150 if (carpr_state > -1) 151 carpr.carpr_state = carpr_state; 152 153 if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1) 154 err(1, "SIOCSVH"); 155 } 156 157 static void 158 setcarp_passwd(const char *val, int d, int s, const struct afswtch *afp) 159 { 160 161 if (carpr_vhid == -1) 162 errx(1, "passwd requires vhid"); 163 164 carpr_key = val; 165 } 166 167 static void 168 setcarp_advskew(const char *val, int d, int s, const struct afswtch *afp) 169 { 170 171 if (carpr_vhid == -1) 172 errx(1, "advskew requires vhid"); 173 174 carpr_advskew = atoi(val); 175 } 176 177 static void 178 setcarp_advbase(const char *val, int d, int s, const struct afswtch *afp) 179 { 180 181 if (carpr_vhid == -1) 182 errx(1, "advbase requires vhid"); 183 184 carpr_advbase = atoi(val); 185 } 186 187 static void 188 setcarp_state(const char *val, int d, int s, const struct afswtch *afp) 189 { 190 int i; 191 192 if (carpr_vhid == -1) 193 errx(1, "state requires vhid"); 194 195 for (i = 0; i <= CARP_MAXSTATE; i++) 196 if (strcasecmp(carp_states[i], val) == 0) { 197 carpr_state = i; 198 return; 199 } 200 201 errx(1, "unknown state"); 202 } 203 204 static struct cmd carp_cmds[] = { 205 DEF_CMD_ARG("advbase", setcarp_advbase), 206 DEF_CMD_ARG("advskew", setcarp_advskew), 207 DEF_CMD_ARG("pass", setcarp_passwd), 208 DEF_CMD_ARG("vhid", setcarp_vhid), 209 DEF_CMD_ARG("state", setcarp_state), 210 }; 211 static struct afswtch af_carp = { 212 .af_name = "af_carp", 213 .af_af = AF_UNSPEC, 214 .af_other_status = carp_status, 215 }; 216 217 static __constructor void 218 carp_ctor(void) 219 { 220 int i; 221 222 for (i = 0; i < nitems(carp_cmds); i++) 223 cmd_register(&carp_cmds[i]); 224 af_register(&af_carp); 225 } 226