sbin/ifconfig/carp.c

   1 /* $NetBSD: carp.c,v 1.12 2008/07/15 21:27:58 dyoung Exp $ */
   2
   3 /*
   4  * Copyright (c) 2002 Michael Shalayeff. All rights reserved.
   5  * Copyright (c) 2003 Ryan McBride. All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
  20  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  22  * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  24  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  25  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  26  * THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 #ifndef lint
  31 __RCSID("$NetBSD: carp.c,v 1.12 2008/07/15 21:27:58 dyoung Exp $");
  32 #endif /* not lint */
  33
  34 #include <sys/param.h>
  35 #include <sys/ioctl.h>
  36 #include <sys/socket.h>
  37 #include <sys/sockio.h>
  38
  39 #include <net/if.h>
  40 #include <netinet/ip_carp.h>
  41 #include <net/route.h>
  42
  43 #include <stdio.h>
  44 #include <string.h>
  45 #include <stdlib.h>
  46 #include <unistd.h>
  47 #include <err.h>
  48 #include <errno.h>
  49 #include <util.h>
  50
  51 #include "env.h"
  52 #include "parse.h"
  53 #include "extern.h"
  54
  55 static status_func_t status;
  56 static usage_func_t usage;
  57 static cmdloop_branch_t branch;
  58
  59 static void carp_constructor(void) __attribute__((constructor));
  60 static void carp_status(prop_dictionary_t, prop_dictionary_t);
  61 static int setcarp_advbase(prop_dictionary_t, prop_dictionary_t);
  62 static int setcarp_advskew(prop_dictionary_t, prop_dictionary_t);
  63 static int setcarp_passwd(prop_dictionary_t, prop_dictionary_t);
  64 static int setcarp_vhid(prop_dictionary_t, prop_dictionary_t);
  65 static int setcarp_state(prop_dictionary_t, prop_dictionary_t);
  66 static int setcarpdev(prop_dictionary_t, prop_dictionary_t);
  67
  68 static const char *carp_states[] = { CARP_STATES };
  69
  70 struct kwinst carpstatekw[] = {
  71           {.k_word = "INIT", .k_nextparser = &command_root.pb_parser}
  72         , {.k_word = "BACKUP", .k_nextparser = &command_root.pb_parser}
  73         , {.k_word = "MASTER", .k_nextparser = &command_root.pb_parser}
  74 };
  75
  76 struct pinteger parse_advbase = PINTEGER_INITIALIZER1(&parse_advbase, "advbase",
  77     0, 255, 10, setcarp_advbase, "advbase", &command_root.pb_parser);
  78
  79 struct pinteger parse_advskew = PINTEGER_INITIALIZER1(&parse_advskew, "advskew",
  80     0, 254, 10, setcarp_advskew, "advskew", &command_root.pb_parser);
  81
  82 struct piface carpdev = PIFACE_INITIALIZER(&carpdev, "carpdev", setcarpdev,
  83     "carpdev", &command_root.pb_parser);
  84
  85 struct pkw carpstate = PKW_INITIALIZER(&carpstate, "carp state", setcarp_state,
  86     "carp_state", carpstatekw, __arraycount(carpstatekw),
  87     &command_root.pb_parser);
  88
  89 struct pstr pass = PSTR_INITIALIZER(&pass, "pass", setcarp_passwd,
  90     "pass", &command_root.pb_parser);
  91
  92 struct pinteger parse_vhid = PINTEGER_INITIALIZER1(&vhid, "vhid",
  93     0, 255, 10, setcarp_vhid, "vhid", &command_root.pb_parser);
  94
  95 static const struct kwinst carpkw[] = {
  96           {.k_word = "advbase", .k_nextparser = &parse_advbase.pi_parser}
  97         , {.k_word = "advskew", .k_nextparser = &parse_advskew.pi_parser}
  98         , {.k_word = "carpdev", .k_nextparser = &carpdev.pif_parser}
  99         , {.k_word = "-carpdev", .k_key = "carpdev", .k_type = KW_T_STR,
 100            .k_str = "", .k_exec = setcarpdev,
 101            .k_nextparser = &command_root.pb_parser}
 102         , {.k_word = "pass", .k_nextparser = &pass.ps_parser}
 103         , {.k_word = "state", .k_nextparser = &carpstate.pk_parser}
 104         , {.k_word = "vhid", .k_nextparser = &parse_vhid.pi_parser}
 105 };
 106
 107 struct pkw carp = PKW_INITIALIZER(&carp, "CARP", NULL, NULL,
 108     carpkw, __arraycount(carpkw), NULL);
 109
 110 static void
 111 carp_set(prop_dictionary_t env, struct carpreq *carpr)
 112 {
 113         if (indirect_ioctl(env, SIOCSVH, carpr) == -1)
 114                 err(EXIT_FAILURE, "SIOCSVH");
 115 }
 116
 117 static int
 118 carp_get1(prop_dictionary_t env, struct carpreq *carpr)
 119 {
 120         memset(carpr, 0, sizeof(*carpr));
 121
 122         return indirect_ioctl(env, SIOCGVH, carpr);
 123 }
 124
 125 static void
 126 carp_get(prop_dictionary_t env, struct carpreq *carpr)
 127 {
 128         if (carp_get1(env, carpr) == -1)
 129                 err(EXIT_FAILURE, "SIOCGVH");
 130 }
 131
 132 static void
 133 carp_status(prop_dictionary_t env, prop_dictionary_t oenv)
 134 {
 135         const char *state;
 136         struct carpreq carpr;
 137
 138         if (carp_get1(env, &carpr) == -1)
 139                 return;
 140
 141         if (carpr.carpr_vhid <= 0)
 142                 return;
 143         if (carpr.carpr_state > CARP_MAXSTATE)
 144                 state = "<UNKNOWN>";
 145         else
 146                 state = carp_states[carpr.carpr_state];
 147
 148         printf("\tcarp: %s carpdev %s vhid %d advbase %d advskew %d\n",
 149             state, carpr.carpr_carpdev[0] != '\0' ?
 150             carpr.carpr_carpdev : "none", carpr.carpr_vhid,
 151             carpr.carpr_advbase, carpr.carpr_advskew);
 152 }
 153
 154 int
 155 setcarp_passwd(prop_dictionary_t env, prop_dictionary_t oenv)
 156 {
 157         struct carpreq carpr;
 158         prop_data_t data;
 159
 160         data = (prop_data_t)prop_dictionary_get(env, "pass");
 161         if (data == NULL) {
 162                 errno = ENOENT;
 163                 return -1;
 164         }
 165
 166         carp_get(env, &carpr);
 167
 168         memset(carpr.carpr_key, 0, sizeof(carpr.carpr_key));
 169         /* XXX Should hash the password into the key here, perhaps? */
 170         strlcpy((char *)carpr.carpr_key, prop_data_data_nocopy(data),
 171             MIN(CARP_KEY_LEN, prop_data_size(data)));
 172
 173         carp_set(env, &carpr);
 174         return 0;
 175 }
 176
 177 int
 178 setcarp_vhid(prop_dictionary_t env, prop_dictionary_t oenv)
 179 {
 180         struct carpreq carpr;
 181         int64_t vhid;
 182
 183         if (!prop_dictionary_get_int64(env, "vhid", &vhid)) {
 184                 errno = ENOENT;
 185                 return -1;
 186         }
 187
 188         carp_get(env, &carpr);
 189
 190         carpr.carpr_vhid = vhid;
 191
 192         carp_set(env, &carpr);
 193         return 0;
 194 }
 195
 196 int
 197 setcarp_advskew(prop_dictionary_t env, prop_dictionary_t oenv)
 198 {
 199         struct carpreq carpr;
 200         int64_t advskew;
 201
 202         if (!prop_dictionary_get_int64(env, "advskew", &advskew)) {
 203                 errno = ENOENT;
 204                 return -1;
 205         }
 206
 207         carp_get(env, &carpr);
 208
 209         carpr.carpr_advskew = advskew;
 210
 211         carp_set(env, &carpr);
 212         return 0;
 213 }
 214
 215 /* ARGSUSED */
 216 int
 217 setcarp_advbase(prop_dictionary_t env, prop_dictionary_t oenv)
 218 {
 219         struct carpreq carpr;
 220         int64_t advbase;
 221
 222         if (!prop_dictionary_get_int64(env, "advbase", &advbase)) {
 223                 errno = ENOENT;
 224                 return -1;
 225         }
 226
 227         carp_get(env, &carpr);
 228
 229         carpr.carpr_advbase = advbase;
 230
 231         carp_set(env, &carpr);
 232         return 0;
 233 }
 234
 235 /* ARGSUSED */
 236 static int
 237 setcarp_state(prop_dictionary_t env, prop_dictionary_t oenv)
 238 {
 239         struct carpreq carpr;
 240         int64_t carp_state;
 241
 242         if (!prop_dictionary_get_int64(env, "carp_state", &carp_state)) {
 243                 errno = ENOENT;
 244                 return -1;
 245         }
 246
 247         carp_get(env, &carpr);
 248
 249         carpr.carpr_state = carp_state;
 250
 251         carp_set(env, &carpr);
 252         return 0;
 253 }
 254
 255 /* ARGSUSED */
 256 int
 257 setcarpdev(prop_dictionary_t env, prop_dictionary_t oenv)
 258 {
 259         struct carpreq carpr;
 260         prop_string_t s;
 261
 262         s = (prop_string_t)prop_dictionary_get(env, "carpdev");
 263         if (s == NULL) {
 264                 errno = ENOENT;
 265                 return -1;
 266         }
 267
 268         carp_get(env, &carpr);
 269
 270         strlcpy(carpr.carpr_carpdev, prop_string_cstring_nocopy(s),
 271             sizeof(carpr.carpr_carpdev));
 272
 273         carp_set(env, &carpr);
 274         return 0;
 275 }
 276
 277 static void
 278 carp_usage(prop_dictionary_t env)
 279 {
 280         fprintf(stderr,
 281             "\t[ advbase n ] [ advskew n ] [ carpdev iface ] "
 282             "[ pass passphrase ] [ state state ] [ vhid n ]\n");
 283
 284 }
 285
 286 static void
 287 carp_constructor(void)
 288 {
 289         cmdloop_branch_init(&branch, &carp.pk_parser);
 290         register_cmdloop_branch(&branch);
 291         status_func_init(&status, carp_status);
 292         usage_func_init(&usage, carp_usage);
 293         register_status(&status);
 294         register_usage(&usage);
 295 }