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  * $DragonFly: src/sbin/ifconfig/ifcarp.c,v 1.1 2007/08/16 20:03:55 dillon Exp $
  30  */
  31
  32 #include <sys/param.h>
  33 #include <sys/ioctl.h>
  34 #include <sys/socket.h>
  35 #include <sys/sockio.h>
  36
  37 #include <stdlib.h>
  38 #include <unistd.h>
  39
  40 #include <net/ethernet.h>
  41 #include <net/if.h>
  42 #include <netinet/in.h>
  43 #include <netinet/ip_carp.h>
  44 #include <net/route.h>
  45
  46 #include <arpa/inet.h>
  47
  48 #include <ctype.h>
  49 #include <stdio.h>
  50 #include <string.h>
  51 #include <stdlib.h>
  52 #include <unistd.h>
  53 #include <err.h>
  54 #include <errno.h>
  55
  56 #include "ifconfig.h"
  57
  58 static const char *carp_states[] = { CARP_STATES };
  59
  60 void carp_status(int s);
  61 void setcarp_advbase(const char *,int, int, const struct afswtch *rafp);
  62 void setcarp_advskew(const char *, int, int, const struct afswtch *rafp);
  63 void setcarp_passwd(const char *, int, int, const struct afswtch *rafp);
  64 void setcarp_vhid(const char *, int, int, const struct afswtch *rafp);
  65
  66 void
  67 carp_status(int s)
  68 {
  69         const char *state;
  70         struct carpreq carpr;
  71         struct ifdrv ifd;
  72         char devname[IFNAMSIZ];
  73         int count, i;
  74
  75         memset((char *)&carpr, 0, sizeof(struct carpreq));
  76         ifr.ifr_data = (caddr_t)&carpr;
  77
  78         if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
  79                 return;
  80
  81         if (carpr.carpr_vhid > 0) {
  82                 if (carpr.carpr_state > CARP_MAXSTATE)
  83                         state = "<UNKNOWN>";
  84                 else
  85                         state = carp_states[carpr.carpr_state];
  86
  87                 printf("\tcarp: %s vhid %d advbase %d advskew %d\n",
  88                     state, carpr.carpr_vhid, carpr.carpr_advbase,
  89                     carpr.carpr_advskew);
  90         }
  91
  92         memset(&ifd, 0, sizeof(ifd));
  93         strncpy(ifd.ifd_name, ifr.ifr_name, sizeof(ifd.ifd_name));
  94         ifd.ifd_cmd = CARPGDEVNAME;
  95         ifd.ifd_len = sizeof(devname);
  96         ifd.ifd_data = devname;
  97         if (ioctl(s, SIOCGDRVSPEC, &ifd) < 0)
  98                 strlcpy(devname, "none", sizeof(devname));
  99         if (devname[0] != '\0')
 100                 printf("\tcarpdev: %s\n", devname);
 101 }
 102
 103 void
 104 setcarp_passwd(const char *val, int d, int s, const struct afswtch *afp)
 105 {
 106         struct carpreq carpr;
 107
 108         memset((char *)&carpr, 0, sizeof(struct carpreq));
 109         ifr.ifr_data = (caddr_t)&carpr;
 110
 111         if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
 112                 err(1, "SIOCGVH");
 113
 114         /* XXX Should hash the password into the key here, perhaps? */
 115         strlcpy(carpr.carpr_key, val, CARP_KEY_LEN);
 116
 117         if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
 118                 err(1, "SIOCSVH");
 119 }
 120
 121 void
 122 setcarp_vhid(const char *val, int d, int s, const struct afswtch *afp)
 123 {
 124         int vhid;
 125         struct carpreq carpr;
 126
 127         vhid = atoi(val);
 128
 129         if (vhid <= 0)
 130                 errx(1, "vhid must be greater than 0");
 131
 132         memset((char *)&carpr, 0, sizeof(struct carpreq));
 133         ifr.ifr_data = (caddr_t)&carpr;
 134
 135         if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
 136                 err(1, "SIOCGVH");
 137
 138         carpr.carpr_vhid = vhid;
 139
 140         if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
 141                 err(1, "SIOCSVH");
 142 }
 143
 144 void
 145 setcarp_advskew(const char *val, int d, int s, const struct afswtch *afp)
 146 {
 147         int advskew;
 148         struct carpreq carpr;
 149
 150         advskew = atoi(val);
 151
 152         memset((char *)&carpr, 0, sizeof(struct carpreq));
 153         ifr.ifr_data = (caddr_t)&carpr;
 154
 155         if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
 156                 err(1, "SIOCGVH");
 157
 158         carpr.carpr_advskew = advskew;
 159
 160         if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
 161                 err(1, "SIOCSVH");
 162 }
 163
 164 void
 165 setcarp_advbase(const char *val, int d, int s, const struct afswtch *afp)
 166 {
 167         int advbase;
 168         struct carpreq carpr;
 169
 170         advbase = atoi(val);
 171
 172         memset((char *)&carpr, 0, sizeof(struct carpreq));
 173         ifr.ifr_data = (caddr_t)&carpr;
 174
 175         if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
 176                 err(1, "SIOCGVH");
 177
 178         carpr.carpr_advbase = advbase;
 179
 180         if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
 181                 err(1, "SIOCSVH");
 182 }
 183
 184 static void
 185 getcarp_vhaddr(const char *val, int d, int s, const struct afswtch *afp)
 186 {
 187 #define VHADDR_PFMT     "%-15s %-15s %s\n"
 188
 189         struct ifdrv ifd;
 190         struct ifcarpvhaddr *carpa;
 191         char devname[IFNAMSIZ];
 192         int count, i;
 193
 194         memset(&ifd, 0, sizeof(ifd));
 195         strncpy(ifd.ifd_name, ifr.ifr_name, sizeof(ifd.ifd_name));
 196         ifd.ifd_cmd = CARPGVHADDR;
 197         if (ioctl(s, SIOCGDRVSPEC, &ifd) < 0)
 198                 return;
 199         if (ifd.ifd_len != 0) {
 200                 carpa = malloc(ifd.ifd_len);
 201                 if (carpa == NULL)
 202                         return;
 203
 204                 ifd.ifd_cmd = CARPGVHADDR;
 205                 ifd.ifd_data = carpa;
 206                 if (ioctl(s, SIOCGDRVSPEC, &ifd) < 0) {
 207                         free(carpa);
 208                         return;
 209                 }
 210         } else {
 211                 carpa = NULL;
 212         }
 213         count = ifd.ifd_len / sizeof(*carpa);
 214         if (count != 0)
 215                 printf(VHADDR_PFMT, "virtual addr", "backing addr", "flags");
 216         for (i = 0; i < count; ++i) {
 217                 char flags[16];
 218                 char baddr[INET_ADDRSTRLEN];
 219                 int a = 0;
 220
 221                 memset(flags, 0, sizeof(flags));
 222                 flags[a] = '*';
 223                 if (carpa[i].carpa_flags & CARP_VHAF_OWNER)
 224                         flags[a++] = 'O';
 225
 226                 memset(baddr, 0, sizeof(baddr));
 227                 baddr[0] = '*';
 228                 if (carpa[i].carpa_baddr.sin_addr.s_addr != INADDR_ANY) {
 229                         inet_ntop(AF_INET, &carpa[i].carpa_baddr.sin_addr,
 230                                   baddr, sizeof(baddr));
 231                 }
 232
 233                 printf(VHADDR_PFMT, inet_ntoa(carpa[i].carpa_addr.sin_addr),
 234                        baddr, flags);
 235         }
 236         if (carpa != NULL)
 237                 free(carpa);
 238
 239 #undef VHADDR_PFMT
 240 }
 241
 242 static struct cmd carp_cmds[] = {
 243         DEF_CMD_ARG("advbase",  setcarp_advbase),
 244         DEF_CMD_ARG("advskew",  setcarp_advskew),
 245         DEF_CMD_ARG("pass",     setcarp_passwd),
 246         DEF_CMD_ARG("vhid",     setcarp_vhid),
 247         DEF_CMD("vhaddr", 1,    getcarp_vhaddr)
 248 };
 249 static struct afswtch af_carp = {
 250         .af_name        = "af_carp",
 251         .af_af          = AF_UNSPEC,
 252         .af_other_status = carp_status,
 253 };
 254
 255 static __constructor void
 256 carp_ctor(void)
 257 {
 258 #define N(a)    (sizeof(a) / sizeof(a[0]))
 259         int i;
 260
 261         for (i = 0; i < N(carp_cmds);  i++)
 262                 cmd_register(&carp_cmds[i]);
 263         af_register(&af_carp);
 264 #undef N
 265 }