NetBSD-5.0.2/sbin/ifconfig/carp.c
/* $NetBSD: carp.c,v 1.12 2008/07/15 21:27:58 dyoung 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/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: carp.c,v 1.12 2008/07/15 21:27:58 dyoung Exp $");
#endif /* not lint */
#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 <util.h>
#include "env.h"
#include "parse.h"
#include "extern.h"
static status_func_t status;
static usage_func_t usage;
static cmdloop_branch_t branch;
static void carp_constructor(void) __attribute__((constructor));
static void carp_status(prop_dictionary_t, prop_dictionary_t);
static int setcarp_advbase(prop_dictionary_t, prop_dictionary_t);
static int setcarp_advskew(prop_dictionary_t, prop_dictionary_t);
static int setcarp_passwd(prop_dictionary_t, prop_dictionary_t);
static int setcarp_vhid(prop_dictionary_t, prop_dictionary_t);
static int setcarp_state(prop_dictionary_t, prop_dictionary_t);
static int setcarpdev(prop_dictionary_t, prop_dictionary_t);
static const char *carp_states[] = { CARP_STATES };
struct kwinst carpstatekw[] = {
{.k_word = "INIT", .k_nextparser = &command_root.pb_parser}
, {.k_word = "BACKUP", .k_nextparser = &command_root.pb_parser}
, {.k_word = "MASTER", .k_nextparser = &command_root.pb_parser}
};
struct pinteger parse_advbase = PINTEGER_INITIALIZER1(&parse_advbase, "advbase",
0, 255, 10, setcarp_advbase, "advbase", &command_root.pb_parser);
struct pinteger parse_advskew = PINTEGER_INITIALIZER1(&parse_advskew, "advskew",
0, 254, 10, setcarp_advskew, "advskew", &command_root.pb_parser);
struct piface carpdev = PIFACE_INITIALIZER(&carpdev, "carpdev", setcarpdev,
"carpdev", &command_root.pb_parser);
struct pkw carpstate = PKW_INITIALIZER(&carpstate, "carp state", setcarp_state,
"carp_state", carpstatekw, __arraycount(carpstatekw),
&command_root.pb_parser);
struct pstr pass = PSTR_INITIALIZER(&pass, "pass", setcarp_passwd,
"pass", &command_root.pb_parser);
struct pinteger parse_vhid = PINTEGER_INITIALIZER1(&vhid, "vhid",
0, 255, 10, setcarp_vhid, "vhid", &command_root.pb_parser);
static const struct kwinst carpkw[] = {
{.k_word = "advbase", .k_nextparser = &parse_advbase.pi_parser}
, {.k_word = "advskew", .k_nextparser = &parse_advskew.pi_parser}
, {.k_word = "carpdev", .k_nextparser = &carpdev.pif_parser}
, {.k_word = "-carpdev", .k_key = "carpdev", .k_type = KW_T_STR,
.k_str = "", .k_exec = setcarpdev,
.k_nextparser = &command_root.pb_parser}
, {.k_word = "pass", .k_nextparser = &pass.ps_parser}
, {.k_word = "state", .k_nextparser = &carpstate.pk_parser}
, {.k_word = "vhid", .k_nextparser = &parse_vhid.pi_parser}
};
struct pkw carp = PKW_INITIALIZER(&carp, "CARP", NULL, NULL,
carpkw, __arraycount(carpkw), NULL);
static void
carp_set(prop_dictionary_t env, struct carpreq *carpr)
{
if (indirect_ioctl(env, SIOCSVH, carpr) == -1)
err(EXIT_FAILURE, "SIOCSVH");
}
static int
carp_get1(prop_dictionary_t env, struct carpreq *carpr)
{
memset(carpr, 0, sizeof(*carpr));
return indirect_ioctl(env, SIOCGVH, carpr);
}
static void
carp_get(prop_dictionary_t env, struct carpreq *carpr)
{
if (carp_get1(env, carpr) == -1)
err(EXIT_FAILURE, "SIOCGVH");
}
static void
carp_status(prop_dictionary_t env, prop_dictionary_t oenv)
{
const char *state;
struct carpreq carpr;
if (carp_get1(env, &carpr) == -1)
return;
if (carpr.carpr_vhid <= 0)
return;
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);
}
int
setcarp_passwd(prop_dictionary_t env, prop_dictionary_t oenv)
{
struct carpreq carpr;
prop_data_t data;
data = (prop_data_t)prop_dictionary_get(env, "pass");
if (data == NULL) {
errno = ENOENT;
return -1;
}
carp_get(env, &carpr);
memset(carpr.carpr_key, 0, sizeof(carpr.carpr_key));
/* XXX Should hash the password into the key here, perhaps? */
strlcpy((char *)carpr.carpr_key, prop_data_data_nocopy(data),
MIN(CARP_KEY_LEN, prop_data_size(data)));
carp_set(env, &carpr);
return 0;
}
int
setcarp_vhid(prop_dictionary_t env, prop_dictionary_t oenv)
{
struct carpreq carpr;
int64_t vhid;
if (!prop_dictionary_get_int64(env, "vhid", &vhid)) {
errno = ENOENT;
return -1;
}
carp_get(env, &carpr);
carpr.carpr_vhid = vhid;
carp_set(env, &carpr);
return 0;
}
int
setcarp_advskew(prop_dictionary_t env, prop_dictionary_t oenv)
{
struct carpreq carpr;
int64_t advskew;
if (!prop_dictionary_get_int64(env, "advskew", &advskew)) {
errno = ENOENT;
return -1;
}
carp_get(env, &carpr);
carpr.carpr_advskew = advskew;
carp_set(env, &carpr);
return 0;
}
/* ARGSUSED */
int
setcarp_advbase(prop_dictionary_t env, prop_dictionary_t oenv)
{
struct carpreq carpr;
int64_t advbase;
if (!prop_dictionary_get_int64(env, "advbase", &advbase)) {
errno = ENOENT;
return -1;
}
carp_get(env, &carpr);
carpr.carpr_advbase = advbase;
carp_set(env, &carpr);
return 0;
}
/* ARGSUSED */
static int
setcarp_state(prop_dictionary_t env, prop_dictionary_t oenv)
{
struct carpreq carpr;
int64_t carp_state;
if (!prop_dictionary_get_int64(env, "carp_state", &carp_state)) {
errno = ENOENT;
return -1;
}
carp_get(env, &carpr);
carpr.carpr_state = carp_state;
carp_set(env, &carpr);
return 0;
}
/* ARGSUSED */
int
setcarpdev(prop_dictionary_t env, prop_dictionary_t oenv)
{
struct carpreq carpr;
prop_data_t data;
data = (prop_data_t)prop_dictionary_get(env, "carpdev");
if (data == NULL) {
errno = ENOENT;
return -1;
}
carp_get(env, &carpr);
strlcpy(carpr.carpr_carpdev, prop_data_data_nocopy(data),
MIN(sizeof(carpr.carpr_carpdev), prop_data_size(data)));
carp_set(env, &carpr);
return 0;
}
static void
carp_usage(prop_dictionary_t env)
{
fprintf(stderr,
"\t[ advbase n ] [ advskew n ] [ carpdev iface ] "
"[ pass passphrase ] [ state state ] [ vhid n ]\n");
}
static void
carp_constructor(void)
{
cmdloop_branch_init(&branch, &carp.pk_parser);
register_cmdloop_branch(&branch);
status_func_init(&status, carp_status);
usage_func_init(&usage, carp_usage);
register_status(&status);
register_usage(&usage);
}