/*
 * Copyright (C) 1999 Yasuhiro Ohara
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * GNU Zebra is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNU Zebra; see the file COPYING.  If not, write to the 
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 
 * Boston, MA 02111-1307, USA.  
 */

#ifndef OSPF6_PREFIX_H
#define OSPF6_PREFIX_H

#include "linklist.h"

#define OSPF6_PREFIX_OPTION_NU (1 << 0)  /* No Unicast */
#define OSPF6_PREFIX_OPTION_LA (1 << 1)  /* Local Address */
#define OSPF6_PREFIX_OPTION_MC (1 << 2)  /* MultiCast */
#define OSPF6_PREFIX_OPTION_P  (1 << 3)  /* Propagate (NSSA) */

struct ospf6_prefix
{
  u_int8_t prefix_length;
  u_int8_t prefix_options;
  union {
    u_int16_t _prefix_metric;
    u_int16_t _prefix_referenced_lstype;
  } u;
#define prefix_metric u._prefix_metric
#define prefix_refer_lstype u._prefix_referenced_lstype
  /* followed by one address_prefix */
};

/* size_t OSPF6_PREFIX_SPACE (int prefixlength); */
#define OSPF6_PREFIX_SPACE(x) ((((x) + 31) / 32) * 4)

/* size_t OSPF6_PREFIX_SIZE (struct ospf6_prefix *); */
#define OSPF6_PREFIX_SIZE(x) \
   (OSPF6_PREFIX_SPACE ((x)->prefix_length) + sizeof (struct ospf6_prefix))

/* struct ospf6_prefix *OSPF6_NEXT_PREFIX (struct ospf6_prefix *); */
#define OSPF6_NEXT_PREFIX(x) \
   ((struct ospf6_prefix *)((char *)(x) + OSPF6_PREFIX_SIZE (x)))



/* Function Prototypes */
struct ospf6_prefix *
  ospf6_prefix_make (u_int8_t, u_int16_t, struct prefix_ipv6 *);
void ospf6_prefix_free (struct ospf6_prefix *);
void ospf6_prefix_in6_addr (struct ospf6_prefix *, struct in6_addr *);
void ospf6_prefix_copy (struct ospf6_prefix *, struct ospf6_prefix *,
                        size_t);

void ospf6_prefix_apply_mask (struct ospf6_prefix *);
int ospf6_prefix_issame (struct ospf6_prefix *, struct ospf6_prefix *);

char *ospf6_prefix_options_str (u_int8_t, char *, size_t);
char *ospf6_prefix_string (struct ospf6_prefix *, char *, size_t);

struct ospf6_prefix *
ospf6_prefix_lookup (list l, struct ospf6_prefix *prefix);
void ospf6_prefix_add (list, struct ospf6_prefix *);

struct ospf6_prefix *
ospf6_prefix_create (u_int8_t, u_int16_t, struct prefix_ipv6 *);
void ospf6_prefix_delete (struct ospf6_prefix *);

void ospf6_prefix_init ();

#endif /* OSPF6_PREFIX_H */