sbin/ifconfig/ifcarp.c

   1 /*
   2  * Copyright (c) 2002 Michael Shalayeff. All rights reserved.
   3  * Copyright (c) 2003 Ryan McBride. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
  18  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  20  * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  22  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  23  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  24  * THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26 /*
  27  * $FreeBSD: src/sbin/ifconfig/ifcarp.c,v 1.2 2005/02/22 14:07:47 glebius Exp $
  28  * $OpenBSD: ifconfig.c,v 1.82 2003/10/19 05:43:35 mcbride Exp $
  29  */
  30
  31 #include <sys/param.h>
  32 #include <sys/ioctl.h>
  33 #include <sys/socket.h>
  34 #include <sys/sockio.h>
  35 #include <net/if.h>
  36 #include <net/route.h>
  37 #include <net/ethernet.h>
  38 #include <netinet/in.h>
  39 #include <netinet/ip_carp.h>
  40 #include <arpa/inet.h>
  41
  42 #include <ctype.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <unistd.h>
  47 #include <err.h>
  48 #include <errno.h>
  49
  50 #include "ifconfig.h"
  51
  52 static const char *carp_states[] = { CARP_STATES };
  53
  54 static void
  55 carp_status(int s)
  56 {
  57         struct carpreq carpr;
  58         struct ifreq ifr;
  59         struct ifdrv ifd;
  60         const char *state;
  61         char devname[IFNAMSIZ];
  62
  63         memset(&ifr, 0, sizeof(ifr));
  64         memset(&carpr, 0, sizeof(carpr));
  65
  66         strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name));
  67         ifr.ifr_data = &carpr;
  68
  69         if (ioctl(s, SIOCGVH, &ifr) == -1)
  70                 return;
  71
  72         if (carpr.carpr_vhid > 0) {
  73                 if (carpr.carpr_state > CARP_MAXSTATE)
  74                         state = "<UNKNOWN>";
  75                 else
  76                         state = carp_states[carpr.carpr_state];
  77
  78                 printf("\tcarp: %s vhid %d advbase %d advskew %d\n",
  79                     state, carpr.carpr_vhid, carpr.carpr_advbase,
  80                     carpr.carpr_advskew);
  81         }
  82
  83         memset(&ifd, 0, sizeof(ifd));
  84         strlcpy(ifd.ifd_name, ifr.ifr_name, sizeof(ifd.ifd_name));
  85         ifd.ifd_cmd = CARPGDEVNAME;
  86         ifd.ifd_len = sizeof(devname);
  87         ifd.ifd_data = devname;
  88         if (ioctl(s, SIOCGDRVSPEC, &ifd) < 0)
  89                 strlcpy(devname, "none", sizeof(devname));
  90         if (devname[0] != '\0')
  91                 printf("\tcarpdev: %s\n", devname);
  92 }
  93
  94 static void
  95 setcarp_passwd(const char *val, int d __unused, int s,
  96                const struct afswtch *afp __unused)
  97 {
  98         struct carpreq carpr;
  99         struct ifreq ifr;
 100
 101         memset(&ifr, 0, sizeof(ifr));
 102         memset(&carpr, 0, sizeof(carpr));
 103
 104         strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name));
 105         ifr.ifr_data = &carpr;
 106
 107         if (ioctl(s, SIOCGVH, &ifr) == -1)
 108                 err(1, "SIOCGVH");
 109
 110         /* XXX Should hash the password into the key here, perhaps? */
 111         strlcpy(carpr.carpr_key, val, CARP_KEY_LEN);
 112
 113         if (ioctl(s, SIOCSVH, &ifr) == -1)
 114                 err(1, "SIOCSVH");
 115 }
 116
 117 static void
 118 setcarp_vhid(const char *val, int d __unused, int s,
 119              const struct afswtch *afp __unused)
 120 {
 121         struct carpreq carpr;
 122         struct ifreq ifr;
 123         int vhid;
 124
 125         vhid = atoi(val);
 126         if (vhid <= 0)
 127                 errx(1, "vhid must be greater than 0");
 128
 129         memset(&ifr, 0, sizeof(ifr));
 130         memset(&carpr, 0, sizeof(carpr));
 131
 132         strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name));
 133         ifr.ifr_data = &carpr;
 134
 135         if (ioctl(s, SIOCGVH, &ifr) == -1)
 136                 err(1, "SIOCGVH");
 137
 138         carpr.carpr_vhid = vhid;
 139
 140         if (ioctl(s, SIOCSVH, &ifr) == -1)
 141                 err(1, "SIOCSVH");
 142 }
 143
 144 static void
 145 setcarp_advskew(const char *val, int d __unused, int s,
 146                 const struct afswtch *afp __unused)
 147 {
 148         struct carpreq carpr;
 149         struct ifreq ifr;
 150         int advskew;
 151
 152         advskew = atoi(val);
 153
 154         memset(&ifr, 0, sizeof(ifr));
 155         memset(&carpr, 0, sizeof(carpr));
 156
 157         strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name));
 158         ifr.ifr_data = &carpr;
 159
 160         if (ioctl(s, SIOCGVH, &ifr) == -1)
 161                 err(1, "SIOCGVH");
 162
 163         carpr.carpr_advskew = advskew;
 164
 165         if (ioctl(s, SIOCSVH, &ifr) == -1)
 166                 err(1, "SIOCSVH");
 167 }
 168
 169 static void
 170 setcarp_advbase(const char *val, int d __unused, int s,
 171                 const struct afswtch *afp __unused)
 172 {
 173         struct carpreq carpr;
 174         struct ifreq ifr;
 175         int advbase;
 176
 177         advbase = atoi(val);
 178
 179         memset(&ifr, 0, sizeof(ifr));
 180         memset(&carpr, 0, sizeof(carpr));
 181
 182         strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name));
 183         ifr.ifr_data = &carpr;
 184
 185         if (ioctl(s, SIOCGVH, &ifr) == -1)
 186                 err(1, "SIOCGVH");
 187
 188         carpr.carpr_advbase = advbase;
 189
 190         if (ioctl(s, SIOCSVH, &ifr) == -1)
 191                 err(1, "SIOCSVH");
 192 }
 193
 194 static void
 195 getcarp_vhaddr(const char *val __unused, int d __unused, int s,
 196                const struct afswtch *afp __unused)
 197 {
 198 #define VHADDR_PFMT     "%-15s %-15s %s\n"
 199
 200         struct ifdrv ifd;
 201         struct ifcarpvhaddr *carpa;
 202         int count, i;
 203
 204         memset(&ifd, 0, sizeof(ifd));
 205         strlcpy(ifd.ifd_name, IfName, sizeof(ifd.ifd_name));
 206         ifd.ifd_cmd = CARPGVHADDR;
 207         if (ioctl(s, SIOCGDRVSPEC, &ifd) < 0)
 208                 return;
 209         if (ifd.ifd_len != 0) {
 210                 carpa = malloc(ifd.ifd_len);
 211                 if (carpa == NULL)
 212                         return;
 213
 214                 ifd.ifd_cmd = CARPGVHADDR;
 215                 ifd.ifd_data = carpa;
 216                 if (ioctl(s, SIOCGDRVSPEC, &ifd) < 0) {
 217                         free(carpa);
 218                         return;
 219                 }
 220         } else {
 221                 carpa = NULL;
 222         }
 223         count = ifd.ifd_len / sizeof(*carpa);
 224         if (count != 0)
 225                 printf(VHADDR_PFMT, "virtual addr", "backing addr", "flags");
 226         for (i = 0; i < count; ++i) {
 227                 char flags[16];
 228                 char baddr[INET_ADDRSTRLEN];
 229                 int a = 0;
 230
 231                 memset(flags, 0, sizeof(flags));
 232                 flags[a] = '*';
 233                 if (carpa[i].carpa_flags & CARP_VHAF_OWNER)
 234                         flags[a++] = 'O';
 235
 236                 memset(baddr, 0, sizeof(baddr));
 237                 baddr[0] = '*';
 238                 if (carpa[i].carpa_baddr.sin_addr.s_addr != INADDR_ANY) {
 239                         inet_ntop(AF_INET, &carpa[i].carpa_baddr.sin_addr,
 240                                   baddr, sizeof(baddr));
 241                 }
 242
 243                 printf(VHADDR_PFMT, inet_ntoa(carpa[i].carpa_addr.sin_addr),
 244                        baddr, flags);
 245         }
 246         if (carpa != NULL)
 247                 free(carpa);
 248
 249 #undef VHADDR_PFMT
 250 }
 251
 252 static struct cmd carp_cmds[] = {
 253         DEF_CMD_ARG("advbase",  setcarp_advbase),
 254         DEF_CMD_ARG("advskew",  setcarp_advskew),
 255         DEF_CMD_ARG("pass",     setcarp_passwd),
 256         DEF_CMD_ARG("vhid",     setcarp_vhid),
 257         DEF_CMD("vhaddr", 1,    getcarp_vhaddr)
 258 };
 259 static struct afswtch af_carp = {
 260         .af_name        = "af_carp",
 261         .af_af          = AF_UNSPEC,
 262         .af_other_status = carp_status,
 263 };
 264
 265 __constructor(131)
 266 static void
 267 carp_ctor(void)
 268 {
 269         size_t i;
 270
 271         for (i = 0; i < nitems(carp_cmds);  i++)
 272                 cmd_register(&carp_cmds[i]);
 273
 274         af_register(&af_carp);
 275 }