any objection in replacing print-vrrp.c with this one?
itojun
/* $NetBSD: print-vrrp.c,v 1.1 2001/01/19 09:10:13 kleink Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Klaus Klein of the Security Competence Center, KPNQwest Germany GmbH.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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 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>
#include <sys/param.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include "interface.h"
#include "addrtoname.h"
#define VRRP_MCAST_DSTADDR 0xe0000012 /* 224.0.0.18 */
/* Note: this is passed down aligned, and therefore safe. */
struct vrrphdr {
uint8_t vers_type; /* protocol version, data type */
uint8_t vrrid; /* virtual router ID */
uint8_t priority; /* sender's priority for VR */
uint8_t addrcount; /* # of addresses to follow */
uint8_t auth_type; /* authentication type */
uint8_t adver_int; /* Advertisement Interval */
uint16_t checksum; /* Checksum */
/* #addrcount IPv4 addresses */
/* 8 bytes of VRRP_AUTH_SIMPLE data */
};
/* vers_type */
#define VRRP_VERSION_SHIFT 4
#define VRRP_VERSION_MASK 0x0f
#define VRRP_VERSION(vp) \
(((vp)->vers_type >> VRRP_VERSION_SHIFT) & VRRP_VERSION_MASK)
#define VRRP_TYPE_SHIFT 0
#define VRRP_TYPE_MASK 0x0f
#define VRRP_TYPE(vp) \
(((vp)->vers_type >> VRRP_TYPE_SHIFT) & VRRP_TYPE_MASK)
#define VRRP_TYPE_ADVERTISEMENT 1
/* auth_type */
#define VRRP_AUTH_NONE 0
#define VRRP_AUTH_SIMPLE 1
#define VRRP_AUTH_AH 2
#define VRRP_AUTHDATA(vp) \
((unsigned char *)((vp) + 1) + \
(vp)->addrcount * sizeof (struct in_addr))
#define VRRP_AUTHDATA_LEN 8
static unsigned int vrrp_cksum(const struct vrrphdr *, unsigned int);
static unsigned int
vrrp_cksum(const struct vrrphdr *vp, unsigned int len)
{
const uint16_t *sp;
unsigned int sum;
sum = 0;
for (sp = (uint16_t *)vp; sp < &vp->checksum; sp++)
sum += ntohs(*sp);
for (sp += 1; sp < (uint16_t *)((uint8_t *)vp + len); sp++)
sum += ntohs(*sp);
while (sum > 0xffff)
sum = (sum & 0xffff) + (sum >> 16);
sum = ~sum & 0xffff;
return (sum);
}
void
vrrp_print(const u_char *bp, u_int length, const u_char *bp2)
{
const struct vrrphdr *vp;
const struct ip *ip;
const struct in_addr *iap;
unsigned int version, type;
int i;
vp = (const struct vrrphdr *)bp;
ip = (const struct ip *)bp2;
iap = (const struct in_addr *)(vp + 1);
if (length < sizeof (*vp) ||
length < sizeof (*vp) + vp->addrcount * 4 + VRRP_AUTHDATA_LEN) {
(void)printf(" truncated-vrrp %u\n", length);
return;
}
version = vp->vers_type >> 4;
type = vp->vers_type & 0xf;
(void)printf("VRRPv%u", version);
if (ntohs(vp->checksum) != vrrp_cksum(vp, length))
printf(" [bad cksum 0x%04x]", ntohs(vp->checksum));
else if (vflag)
printf(" [cksum ok]");
if (ntohl(ip->ip_dst.s_addr) != VRRP_MCAST_DSTADDR)
(void)printf(" [bad dst %s]", ipaddr_string(&ip->ip_dst));
if (ip->ip_ttl < 255U)
(void)printf(" [bad ttl %u]", ip->ip_ttl);
switch (version) {
case 2:
switch (type) {
case VRRP_TYPE_ADVERTISEMENT:
printf(" adv");
printf(" vrrid %u prio %u", vp->vrrid, vp->priority);
switch (vp->auth_type) {
case VRRP_AUTH_NONE:
printf(" auth-none");
break;
case VRRP_AUTH_SIMPLE:
printf(" auth-simple");
if (vflag >= 2) {
printf(" [authdata ");
(void)fn_printn(VRRP_AUTHDATA(vp),
VRRP_AUTHDATA_LEN, NULL);
printf("]");
}
break;
case VRRP_AUTH_AH:
printf(" auth-ah");
break;
default:
printf(" auth-%u", vp->auth_type);
break;
}
printf(" adv-interval %u", vp->adver_int);
if (vp->addrcount > 0)
printf(" assoc-addr");
for (i = 0; i < vp->addrcount; i++) {
printf(" %s", ipaddr_string(&iap[i]));
}
break;
default: /* type */
printf(" type-%u", type);
return;
}
break;
default: /* version */
break;
}
}
