257 lines
6.7 KiB
C
257 lines
6.7 KiB
C
/* from $OpenBSD: ifconfig.c,v 1.82 2003/10/19 05:43:35 mcbride Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2002 Michael Shalayeff. All rights reserved.
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* Copyright (c) 2003 Ryan McBride. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet/ip_carp.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <err.h>
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#include <errno.h>
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#include <netdb.h>
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#include <libifconfig.h>
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#include "ifconfig.h"
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static const char *carp_states[] = { CARP_STATES };
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static void setcarp_callback(if_ctx *, void *);
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static int carpr_vhid = -1;
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static int carpr_advskew = -1;
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static int carpr_advbase = -1;
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static int carpr_state = -1;
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static struct in_addr carp_addr;
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static struct in6_addr carp_addr6;
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static unsigned char const *carpr_key;
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static void
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carp_status(if_ctx *ctx)
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{
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struct ifconfig_carp carpr[CARP_MAXVHID];
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char addr_buf[NI_MAXHOST];
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if (ifconfig_carp_get_info(lifh, ctx->ifname, carpr, CARP_MAXVHID) == -1)
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return;
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for (size_t i = 0; i < carpr[0].carpr_count; i++) {
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printf("\tcarp: %s vhid %d advbase %d advskew %d",
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carp_states[carpr[i].carpr_state], carpr[i].carpr_vhid,
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carpr[i].carpr_advbase, carpr[i].carpr_advskew);
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if (ctx->args->printkeys && carpr[i].carpr_key[0] != '\0')
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printf(" key \"%s\"\n", carpr[i].carpr_key);
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else
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printf("\n");
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inet_ntop(AF_INET6, &carpr[i].carpr_addr6, addr_buf,
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sizeof(addr_buf));
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printf("\t peer %s peer6 %s\n",
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inet_ntoa(carpr[i].carpr_addr), addr_buf);
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}
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}
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static void
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setcarp_vhid(if_ctx *ctx, const char *val, int dummy __unused)
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{
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const struct afswtch *afp = ctx->afp;
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carpr_vhid = atoi(val);
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if (carpr_vhid <= 0 || carpr_vhid > CARP_MAXVHID)
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errx(1, "vhid must be greater than 0 and less than %u",
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CARP_MAXVHID);
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if (afp->af_setvhid == NULL)
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errx(1, "%s doesn't support carp(4)", afp->af_name);
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afp->af_setvhid(carpr_vhid);
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callback_register(setcarp_callback, NULL);
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}
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static void
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setcarp_callback(if_ctx *ctx, void *arg __unused)
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{
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struct ifconfig_carp carpr = { };
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if (ifconfig_carp_get_vhid(lifh, ctx->ifname, &carpr, carpr_vhid) == -1) {
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if (ifconfig_err_errno(lifh) != ENOENT)
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return;
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}
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carpr.carpr_vhid = carpr_vhid;
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if (carpr_key != NULL)
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/* XXX Should hash the password into the key here? */
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strlcpy(carpr.carpr_key, carpr_key, CARP_KEY_LEN);
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if (carpr_advskew > -1)
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carpr.carpr_advskew = carpr_advskew;
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if (carpr_advbase > -1)
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carpr.carpr_advbase = carpr_advbase;
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if (carpr_state > -1)
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carpr.carpr_state = carpr_state;
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if (carp_addr.s_addr != INADDR_ANY)
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carpr.carpr_addr = carp_addr;
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if (! IN6_IS_ADDR_UNSPECIFIED(&carp_addr6))
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memcpy(&carpr.carpr_addr6, &carp_addr6,
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sizeof(carp_addr6));
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if (ifconfig_carp_set_info(lifh, ctx->ifname, &carpr))
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err(1, "SIOCSVH");
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}
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static void
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setcarp_passwd(if_ctx *ctx __unused, const char *val, int dummy __unused)
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{
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if (carpr_vhid == -1)
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errx(1, "passwd requires vhid");
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carpr_key = val;
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}
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static void
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setcarp_advskew(if_ctx *ctx __unused, const char *val, int dummy __unused)
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{
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if (carpr_vhid == -1)
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errx(1, "advskew requires vhid");
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carpr_advskew = atoi(val);
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}
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static void
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setcarp_advbase(if_ctx *ctx __unused, const char *val, int dummy __unused)
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{
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if (carpr_vhid == -1)
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errx(1, "advbase requires vhid");
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carpr_advbase = atoi(val);
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}
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static void
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setcarp_state(if_ctx *ctx __unused, const char *val, int dummy __unused)
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{
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int i;
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if (carpr_vhid == -1)
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errx(1, "state requires vhid");
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for (i = 0; i <= CARP_MAXSTATE; i++)
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if (strcasecmp(carp_states[i], val) == 0) {
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carpr_state = i;
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return;
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}
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errx(1, "unknown state");
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}
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static void
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setcarp_peer(if_ctx *ctx __unused, const char *val, int dummy __unused)
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{
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carp_addr.s_addr = inet_addr(val);
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}
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static void
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setcarp_mcast(if_ctx *ctx __unused, const char *val __unused, int dummy __unused)
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{
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carp_addr.s_addr = htonl(INADDR_CARP_GROUP);
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}
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static void
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setcarp_peer6(if_ctx *ctx __unused, const char *val, int dummy __unused)
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{
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struct addrinfo hints, *res;
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = AF_INET6;
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hints.ai_flags = AI_NUMERICHOST;
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if (getaddrinfo(val, NULL, &hints, &res) != 0)
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errx(1, "Invalid IPv6 address %s", val);
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memcpy(&carp_addr6, &(satosin6(res->ai_addr))->sin6_addr, sizeof(carp_addr6));
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freeaddrinfo(res);
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}
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static void
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setcarp_mcast6(if_ctx *ctx __unused, const char *val __unused, int dummy __unused)
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{
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bzero(&carp_addr6, sizeof(carp_addr6));
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carp_addr6.s6_addr[0] = 0xff;
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carp_addr6.s6_addr[1] = 0x02;
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carp_addr6.s6_addr[15] = 0x12;
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}
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static struct cmd carp_cmds[] = {
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DEF_CMD_ARG("advbase", setcarp_advbase),
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DEF_CMD_ARG("advskew", setcarp_advskew),
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DEF_CMD_ARG("pass", setcarp_passwd),
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DEF_CMD_ARG("vhid", setcarp_vhid),
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DEF_CMD_ARG("state", setcarp_state),
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DEF_CMD_ARG("peer", setcarp_peer),
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DEF_CMD("mcast", 0, setcarp_mcast),
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DEF_CMD_ARG("peer6", setcarp_peer6),
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DEF_CMD("mcast6", 0, setcarp_mcast6),
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};
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static struct afswtch af_carp = {
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.af_name = "af_carp",
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.af_af = AF_UNSPEC,
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.af_other_status = carp_status,
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};
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static __constructor void
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carp_ctor(void)
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{
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/* Default to multicast. */
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setcarp_mcast(NULL, NULL, 0);
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setcarp_mcast6(NULL, NULL, 0);
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for (size_t i = 0; i < nitems(carp_cmds); i++)
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cmd_register(&carp_cmds[i]);
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af_register(&af_carp);
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}
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