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