NetBSD/sbin/ifconfig/carp.c

253 lines
6.0 KiB
C

/* $NetBSD: carp.c,v 1.1 2006/05/18 09:05:50 liamjfoy Exp $ */
/*
* Copyright (c) 2002 Michael Shalayeff. All rights reserved.
* Copyright (c) 2003 Ryan McBride. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <net/if.h>
#include <netinet/ip_carp.h>
#include <net/route.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <err.h>
#include <errno.h>
#include "extern.h"
void carp_status(void);
void setcarp_advbase(const char *,int);
void setcarp_advskew(const char *, int);
void setcarp_passwd(const char *, int);
void setcarp_vhid(const char *, int);
void setcarp_state(const char *, int);
void setcarpdev(const char *, int);
void unsetcarpdev(const char *, int);
static const char *carp_states[] = { CARP_STATES };
void
carp_status(void)
{
const char *state;
struct carpreq carpr;
memset((char *)&carpr, 0, sizeof(struct carpreq));
ifr.ifr_data = (caddr_t)&carpr;
if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
return;
if (carpr.carpr_vhid > 0) {
if (carpr.carpr_state > CARP_MAXSTATE)
state = "<UNKNOWN>";
else
state = carp_states[carpr.carpr_state];
printf("\tcarp: %s carpdev %s vhid %d advbase %d advskew %d\n",
state, carpr.carpr_carpdev[0] != '\0' ?
carpr.carpr_carpdev : "none", carpr.carpr_vhid,
carpr.carpr_advbase, carpr.carpr_advskew);
}
}
/* ARGSUSED */
void
setcarp_passwd(const char *val, int d)
{
struct carpreq carpr;
memset((char *)&carpr, 0, sizeof(struct carpreq));
ifr.ifr_data = (caddr_t)&carpr;
if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
err(EXIT_FAILURE, "SIOCGVH");
/* XXX Should hash the password into the key here, perhaps? */
strlcpy((char *)carpr.carpr_key, val, CARP_KEY_LEN);
if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
err(EXIT_FAILURE, "SIOCSVH");
}
/* ARGSUSED */
void
setcarp_vhid(const char *val, int d)
{
struct carpreq carpr;
long tmp;
char *ep;
int vhid;
errno = 0;
tmp = strtol(val, &ep, 10);
if (*ep != '\0' || tmp < 0 || tmp > 255
|| errno == ERANGE)
errx(EXIT_FAILURE, "vhid: %s: must be between 0 and 255",
val);
vhid = (int)tmp;
memset((char *)&carpr, 0, sizeof(struct carpreq));
ifr.ifr_data = (caddr_t)&carpr;
if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
err(EXIT_FAILURE, "SIOCGVH");
carpr.carpr_vhid = vhid;
if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
err(EXIT_FAILURE, "SIOCSVH");
}
/* ARGSUSED */
void
setcarp_advskew(const char *val, int d)
{
struct carpreq carpr;
long tmp;
char *ep;
int advskew;
errno = 0;
tmp = strtol(val, &ep, 10);
if (*ep != '\0' || tmp < 0 || tmp > 254
|| errno == ERANGE)
errx(EXIT_FAILURE, "advskew: %s: must be between 0 and 254",
val);
advskew = (int)tmp;
memset((char *)&carpr, 0, sizeof(struct carpreq));
ifr.ifr_data = (caddr_t)&carpr;
if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
err(EXIT_FAILURE, "SIOCGVH");
carpr.carpr_advskew = advskew;
if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
err(EXIT_FAILURE, "SIOCSVH");
}
/* ARGSUSED */
void
setcarp_advbase(const char *val, int d)
{
struct carpreq carpr;
long tmp;
char *ep;
int advbase;
errno = 0;
tmp = strtol(val, &ep, 10);
if (*ep != '\0' || tmp < 0 || tmp > 255
|| errno == ERANGE)
errx(EXIT_FAILURE, "advbase: %s: must be between 0 and 255",
val);
advbase = (int)tmp;
memset((char *)&carpr, 0, sizeof(struct carpreq));
ifr.ifr_data = (caddr_t)&carpr;
if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
err(EXIT_FAILURE, "SIOCGVH");
carpr.carpr_advbase = advbase;
if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
err(EXIT_FAILURE, "SIOCSVH");
}
/* ARGSUSED */
void
setcarp_state(const char *val, int d)
{
struct carpreq carpr;
int i;
bzero((char *)&carpr, sizeof(struct carpreq));
ifr.ifr_data = (caddr_t)&carpr;
if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
err(EXIT_FAILURE, "SIOCGVH");
for (i = 0; i <= CARP_MAXSTATE; i++) {
if (!strcasecmp(val, carp_states[i])) {
carpr.carpr_state = i;
break;
}
}
if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
err(EXIT_FAILURE, "SIOCSVH");
}
/* ARGSUSED */
void
setcarpdev(const char *val, int d)
{
struct carpreq carpr;
bzero((char *)&carpr, sizeof(struct carpreq));
ifr.ifr_data = (caddr_t)&carpr;
if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
err(EXIT_FAILURE, "SIOCGVH");
strlcpy(carpr.carpr_carpdev, val, sizeof(carpr.carpr_carpdev));
if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
err(EXIT_FAILURE, "SIOCSVH");
}
void
unsetcarpdev(const char *val, int d)
{
struct carpreq carpr;
bzero((char *)&carpr, sizeof(struct carpreq));
ifr.ifr_data = (caddr_t)&carpr;
if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
err(EXIT_FAILURE, "SIOCGVH");
bzero((char *)&carpr.carpr_carpdev, sizeof(carpr.carpr_carpdev));
if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
err(EXIT_FAILURE, "SIOCSVH");
}