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/ip_carp.h>
  43 #include <net/route.h>
  44
  45 #include <ctype.h>
  46 #include <stdio.h>
  47 #include <string.h>
  48 #include <stdlib.h>
  49 #include <unistd.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
  69         memset((char *)&carpr, 0, sizeof(struct carpreq));
  70         ifr.ifr_data = (caddr_t)&carpr;
  71
  72         if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
  73                 return;
  74
  75         if (carpr.carpr_vhid > 0) {
  76                 if (carpr.carpr_state > CARP_MAXSTATE)
  77                         state = "<UNKNOWN>";
  78                 else
  79                         state = carp_states[carpr.carpr_state];
  80
  81                 printf("\tcarp: %s vhid %d advbase %d advskew %d\n",
  82                     state, carpr.carpr_vhid, carpr.carpr_advbase,
  83                     carpr.carpr_advskew);
  84         }
  85
  86         return;
  87
  88 }
  89
  90 void
  91 setcarp_passwd(const char *val, int d, int s, const struct afswtch *afp)
  92 {
  93         struct carpreq carpr;
  94
  95         memset((char *)&carpr, 0, sizeof(struct carpreq));
  96         ifr.ifr_data = (caddr_t)&carpr;
  97
  98         if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
  99                 err(1, "SIOCGVH");
 100
 101         /* XXX Should hash the password into the key here, perhaps? */
 102         strlcpy(carpr.carpr_key, val, CARP_KEY_LEN);
 103
 104         if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
 105                 err(1, "SIOCSVH");
 106
 107         return;
 108 }
 109
 110 void
 111 setcarp_vhid(const char *val, int d, int s, const struct afswtch *afp)
 112 {
 113         int vhid;
 114         struct carpreq carpr;
 115
 116         vhid = atoi(val);
 117
 118         if (vhid <= 0)
 119                 errx(1, "vhid must be greater than 0");
 120
 121         memset((char *)&carpr, 0, sizeof(struct carpreq));
 122         ifr.ifr_data = (caddr_t)&carpr;
 123
 124         if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
 125                 err(1, "SIOCGVH");
 126
 127         carpr.carpr_vhid = vhid;
 128
 129         if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
 130                 err(1, "SIOCSVH");
 131
 132         return;
 133 }
 134
 135 void
 136 setcarp_advskew(const char *val, int d, int s, const struct afswtch *afp)
 137 {
 138         int advskew;
 139         struct carpreq carpr;
 140
 141         advskew = atoi(val);
 142
 143         memset((char *)&carpr, 0, sizeof(struct carpreq));
 144         ifr.ifr_data = (caddr_t)&carpr;
 145
 146         if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
 147                 err(1, "SIOCGVH");
 148
 149         carpr.carpr_advskew = advskew;
 150
 151         if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
 152                 err(1, "SIOCSVH");
 153
 154         return;
 155 }
 156
 157 void
 158 setcarp_advbase(const char *val, int d, int s, const struct afswtch *afp)
 159 {
 160         int advbase;
 161         struct carpreq carpr;
 162
 163         advbase = atoi(val);
 164
 165         memset((char *)&carpr, 0, sizeof(struct carpreq));
 166         ifr.ifr_data = (caddr_t)&carpr;
 167
 168         if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
 169                 err(1, "SIOCGVH");
 170
 171         carpr.carpr_advbase = advbase;
 172
 173         if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
 174                 err(1, "SIOCSVH");
 175
 176         return;
 177 }
 178
 179 static struct cmd carp_cmds[] = {
 180         DEF_CMD_ARG("advbase",  setcarp_advbase),
 181         DEF_CMD_ARG("advskew",  setcarp_advskew),
 182         DEF_CMD_ARG("pass",     setcarp_passwd),
 183         DEF_CMD_ARG("vhid",     setcarp_vhid),
 184 };
 185 static struct afswtch af_carp = {
 186         .af_name        = "af_carp",
 187         .af_af          = AF_UNSPEC,
 188         .af_other_status = carp_status,
 189 };
 190
 191 static __constructor void
 192 carp_ctor(void)
 193 {
 194 #define N(a)    (sizeof(a) / sizeof(a[0]))
 195         int i;
 196
 197         for (i = 0; i < N(carp_cmds);  i++)
 198                 cmd_register(&carp_cmds[i]);
 199         af_register(&af_carp);
 200 #undef N
 201 }