/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _VRRP_H
#define _VRRP_H

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef struct vrrp_pkt_s {
        uint8_t         vp_vers_type;
        uint8_t         vp_vrid;
        uint8_t         vp_prio;
        uint8_t         vp_ipnum;
        uint16_t        vp_rsvd_adver_int;
        uint16_t        vp_chksum;
        /* then follows <vp_ipnum> IPvX addresses */
        /* then follows NO authentification data */
} vrrp_pkt_t;

#define IPPROTO_VRRP            112     /* IP protocol number */
#define VRRP_AUTH_LEN           0       /* XXX length of a chunk of Auth Data */

#define VRRP_IP_TTL             255     /* IPv4 TTL, IPv6 hop limit */
#define VRRP_VERSION            3       /* current version */
#define VRRP_PKT_ADVERT         1       /* packet type */
#define VRRP_VER_MASK           0xf0    /* version mask */
#define VRRP_TYPE_MASK          0x0f    /* packet type mask */

#define VRRP_PRI_OWNER          255     /* priority of IP address owner */
#define VRRP_PRI_MIN            1       /* minimum priority */
#define VRRP_PRIO_ZERO          0       /* stop participating VRRP */
#define VRRP_PRI_DEFAULT        VRRP_PRI_OWNER  /* default priority */

#define VRRP_VRID_NONE          0
#define VRRP_VRID_MIN           1
#define VRRP_VRID_MAX           255

#define CENTISEC2MSEC(centisec) ((centisec) * 10)
#define MSEC2CENTISEC(msec)     ((msec) / 10)

/* Max advertisement interval, in msec */
#define VRRP_MAX_ADVER_INT_MIN  CENTISEC2MSEC(1)
#define VRRP_MAX_ADVER_INT_MAX  CENTISEC2MSEC(4095)     /* (2^12 -1) */
#define VRRP_MAX_ADVER_INT_DFLT CENTISEC2MSEC(100)      /* 1 sec */

#ifdef __cplusplus
}
#endif

#endif  /* _VRRP_H */