/*      $OpenBSD: rip.h,v 1.4 2007/10/18 17:00:59 deraadt Exp $ */

/*
 * Copyright (c) 2006 Michele Marchetto <mydecay@openbeer.it>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/* RIP protocol definitions */

#ifndef _RIP_H_
#define _RIP_H_

/* misc */
#define RIP_VERSION             2
#define ALL_RIP_ROUTERS         "224.0.0.9"
#define RIP_PORT                520

#define MIN_MD_ID               0
#define MAX_MD_ID               255

/* metric */
#define INFINITY                16
#define DEFAULT_COST            1

/* timers */
#define KEEPALIVE               30
#define OFFSET                  10
#define FAILED_NBR_TIMEOUT      86400

#define MAX_RIP_ENTRIES         25

/* RIP command */
#define COMMAND_REQUEST         1
#define COMMAND_RESPONSE        2

#define RIP_HDR_LEN             sizeof(struct rip_hdr)
#define RIP_ENTRY_LEN           sizeof(struct rip_entry)

struct rip_hdr {
        u_int8_t        command;
        u_int8_t        version;
        u_int16_t       dummy;
};

struct rip_entry {
        u_int16_t       AFI;
        u_int16_t       route_tag;
        u_int32_t       address;
        u_int32_t       mask;
        u_int32_t       nexthop;
        u_int32_t       metric;
};

/* auth */
#define AUTH                    0xFFFF
#define AUTH_TRLR_HDR_LEN       4

/* auth general struct */
struct rip_auth {
        u_int16_t        auth_fixed;
        u_int16_t        auth_type;
};

/* Keyed MD5 auth struct */
struct md5_auth {
        u_int16_t        auth_offset;
        u_int8_t         auth_keyid;
        u_int8_t         auth_length;
        u_int32_t        auth_seq;
        u_int64_t        auth_reserved;
};

#endif /* _RIP_H_ */