/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 1999 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
/*        All Rights Reserved   */

/*
 * Portions of this source code were derived from Berkeley 4.3 BSD
 * under license from the Regents of the University of California.
 */

/*
 * Routing table management daemon.
 */

/*
 * Routing table structure; differs a bit from kernel tables.
 */
struct rthash {
        struct  rt_entry *rt_forw;
        struct  rt_entry *rt_back;
};

struct rt_entry {
        struct  rt_entry *rt_forw;
        struct  rt_entry *rt_back;
        uint_t  rt_hash;                /* for net or host */
        struct  in6_addr rt_dst;        /* match value */
        struct  in6_addr rt_router;     /* who to forward to */
        int     rt_prefix_length;       /* bits in prefix */
        struct  interface *rt_ifp;      /* interface to take */
        uint_t  rt_flags;               /* kernel flags */
        uint_t  rt_state;               /* see below */
        int     rt_timer;               /* for invalidation */
        int     rt_metric;              /* cost of route including the if */
        int     rt_tag;                 /* route tag attribute */
};

#define ROUTEHASHSIZ    32              /* must be a power of 2 */
#define ROUTEHASHMASK   (ROUTEHASHSIZ - 1)

/*
 * "State" of routing table entry.
 */
#define RTS_CHANGED     0x1             /* route has been altered recently */
#define RTS_INTERFACE   0x2             /* route is for network interface */
#define RTS_PRIVATE     0x4             /* route is private, do not advertise */

/*
 * XXX This is defined in <inet/ip.h> (but should be defined in <netinet/ip6.h>
 * for completeness).
 */
#define IPV6_ABITS      128             /* Number of bits in an IPv6 address */

extern struct   rthash  *net_hashes[IPV6_ABITS + 1];

extern void     rtadd(struct in6_addr *, struct in6_addr *, int, int, int,
    boolean_t, struct interface *);
extern void     rtchange(struct rt_entry *, struct in6_addr *, short,
    struct interface *);
extern void     rtchangeall(void);
extern void     rtcreate_prefix(struct in6_addr *, struct in6_addr *, int);
extern void     rtdelete(struct rt_entry *);
extern void     rtdown(struct rt_entry *);
extern void     rtdump(void);
extern struct   rt_entry *rtlookup(struct in6_addr *, int);
extern void     rtpurgeif(struct interface *);