/*
* Routing Information Base header
* Copyright (C) 1997 Kunihiro Ishiguro
*
* 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 _ZEBRA_RIB_H
#define _ZEBRA_RIB_H
#include "prefix.h"
#define DISTANCE_INFINITY 255
/* Routing information base. */
union g_addr {
struct in_addr ipv4;
#ifdef HAVE_IPV6
struct in6_addr ipv6;
#endif /* HAVE_IPV6 */
};
struct rib
{
/* Status Flags for the *route_node*, but kept in the head RIB.. */
u_char rn_status;
#define RIB_ROUTE_QUEUED(x) (1 << (x))
/* Link list. */
struct rib *next;
struct rib *prev;
/* Nexthop structure */
struct nexthop *nexthop;
/* Refrence count. */
unsigned long refcnt;
/* Uptime. */
time_t uptime;
/* Type fo this route. */
int type;
/* Which routing table */
int table;
/* Metric */
u_int32_t metric;
/* Distance. */
u_char distance;
/* Flags of this route.
* This flag's definition is in lib/zebra.h ZEBRA_FLAG_* and is exposed
* to clients via Zserv
*/
u_char flags;
/* RIB internal status */
u_char status;
#define RIB_ENTRY_REMOVED (1 << 0)
/* Nexthop information. */
u_char nexthop_num;
u_char nexthop_active_num;
u_char nexthop_fib_num;
};
/* meta-queue structure:
* sub-queue 0: connected, kernel
* sub-queue 1: static
* sub-queue 2: RIP, RIPng, OSPF, OSPF6, IS-IS
* sub-queue 3: iBGP, eBGP
* sub-queue 4: any other origin (if any)
*/
#define MQ_SIZE 5
struct meta_queue
{
struct list *subq[MQ_SIZE];
u_int32_t size; /* sum of lengths of all subqueues */
};
/* Static route information. */
struct static_ipv4
{
/* For linked list. */
struct static_ipv4 *prev;
struct static_ipv4 *next;
/* Administrative distance. */
u_char distance;
/* Flag for this static route's type. */
u_char type;
#define STATIC_IPV4_GATEWAY 1
#define STATIC_IPV4_IFNAME 2
#define STATIC_IPV4_BLACKHOLE 3
/* Nexthop value. */
union
{
struct in_addr ipv4;
char *ifname;
} gate;
/* bit flags */
u_char flags;
/*
see ZEBRA_FLAG_REJECT
ZEBRA_FLAG_BLACKHOLE
*/
};
#ifdef HAVE_IPV6
/* Static route information. */
struct static_ipv6
{
/* For linked list. */
struct static_ipv6 *prev;
struct static_ipv6 *next;
/* Administrative distance. */
u_char distance;
/* Flag for this static route's type. */
u_char type;
#define STATIC_IPV6_GATEWAY 1
#define STATIC_IPV6_GATEWAY_IFNAME 2
#define STATIC_IPV6_IFNAME 3
/* Nexthop value. */
struct in6_addr ipv6;
char *ifname;
/* bit flags */
u_char flags;
/*
see ZEBRA_FLAG_REJECT
ZEBRA_FLAG_BLACKHOLE
*/
};
#endif /* HAVE_IPV6 */
enum nexthop_types_t
{
NEXTHOP_TYPE_IFINDEX = 1, /* Directly connected. */
NEXTHOP_TYPE_IFNAME, /* Interface route. */
NEXTHOP_TYPE_IPV4, /* IPv4 nexthop. */
NEXTHOP_TYPE_IPV4_IFINDEX, /* IPv4 nexthop with ifindex. */
NEXTHOP_TYPE_IPV4_IFNAME, /* IPv4 nexthop with ifname. */
NEXTHOP_TYPE_IPV6, /* IPv6 nexthop. */
NEXTHOP_TYPE_IPV6_IFINDEX, /* IPv6 nexthop with ifindex. */
NEXTHOP_TYPE_IPV6_IFNAME, /* IPv6 nexthop with ifname. */
NEXTHOP_TYPE_BLACKHOLE, /* Null0 nexthop. */
};
/* Nexthop structure. */
struct nexthop
{
struct nexthop *next;
struct nexthop *prev;
/* Interface index. */
char *ifname;
unsigned int ifindex;
enum nexthop_types_t type;
u_char flags;
#define NEXTHOP_FLAG_ACTIVE (1 << 0) /* This nexthop is alive. */
#define NEXTHOP_FLAG_FIB (1 << 1) /* FIB nexthop. */
#define NEXTHOP_FLAG_RECURSIVE (1 << 2) /* Recursive nexthop. */
/* Nexthop address or interface name. */
union g_addr gate;
/* Recursive lookup nexthop. */
u_char rtype;
unsigned int rifindex;
union g_addr rgate;
union g_addr src;
};
/* Routing table instance. */
struct vrf
{
/* Identifier. This is same as routing table vector index. */
u_int32_t id;
/* Routing table name. */
char *name;
/* Description. */
char *desc;
/* FIB identifier. */
u_char fib_id;
/* Routing table. */
struct route_table *table[AFI_MAX][SAFI_MAX];
/* Static route configuration. */
struct route_table *stable[AFI_MAX][SAFI_MAX];
};
extern struct nexthop *nexthop_ifindex_add (struct rib *, unsigned int);
extern struct nexthop *nexthop_ifname_add (struct rib *, char *);
extern struct nexthop *nexthop_blackhole_add (struct rib *);
extern struct nexthop *nexthop_ipv4_add (struct rib *, struct in_addr *,
struct in_addr *);
extern void rib_lookup_and_dump (struct prefix_ipv4 *);
extern void rib_lookup_and_pushup (struct prefix_ipv4 *);
extern void rib_dump (const char *, const struct prefix_ipv4 *, const struct rib *);
extern int rib_lookup_ipv4_route (struct prefix_ipv4 *, union sockunion *);
#define ZEBRA_RIB_LOOKUP_ERROR -1
#define ZEBRA_RIB_FOUND_EXACT 0
#define ZEBRA_RIB_FOUND_NOGATE 1
#define ZEBRA_RIB_FOUND_CONNECTED 2
#define ZEBRA_RIB_NOTFOUND 3
#ifdef HAVE_IPV6
extern struct nexthop *nexthop_ipv6_add (struct rib *, struct in6_addr *);
#endif /* HAVE_IPV6 */
extern struct vrf *vrf_lookup (u_int32_t);
extern struct route_table *vrf_table (afi_t afi, safi_t safi, u_int32_t id);
extern struct route_table *vrf_static_table (afi_t afi, safi_t safi, u_int32_t id);
/* NOTE:
* All rib_add_ipv[46]* functions will not just add prefix into RIB, but
* also implicitly withdraw equal prefix of same type. */
extern int rib_add_ipv4 (int type, int flags, struct prefix_ipv4 *p,
struct in_addr *gate, struct in_addr *src,
unsigned int ifindex, u_int32_t vrf_id,
u_int32_t, u_char);
extern int rib_add_ipv4_multipath (struct prefix_ipv4 *, struct rib *);
extern int rib_delete_ipv4 (int type, int flags, struct prefix_ipv4 *p,
struct in_addr *gate, unsigned int ifindex,
u_int32_t);
extern struct rib *rib_match_ipv4 (struct in_addr);
extern struct rib *rib_lookup_ipv4 (struct prefix_ipv4 *);
extern void rib_update (void);
extern void rib_weed_tables (void);
extern void rib_sweep_route (void);
extern void rib_close (void);
extern void rib_init (void);
extern int
static_add_ipv4 (struct prefix *p, struct in_addr *gate, const char *ifname,
u_char flags, u_char distance, u_int32_t vrf_id);
extern int
static_delete_ipv4 (struct prefix *p, struct in_addr *gate, const char *ifname,
u_char distance, u_int32_t vrf_id);
#ifdef HAVE_IPV6
extern int
rib_add_ipv6 (int type, int flags, struct prefix_ipv6 *p,
struct in6_addr *gate, unsigned int ifindex, u_int32_t vrf_id,
u_int32_t metric, u_char distance);
extern int
rib_delete_ipv6 (int type, int flags, struct prefix_ipv6 *p,
struct in6_addr *gate, unsigned int ifindex, u_int32_t vrf_id);
extern struct rib *rib_lookup_ipv6 (struct in6_addr *);
extern struct rib *rib_match_ipv6 (struct in6_addr *);
extern struct route_table *rib_table_ipv6;
extern int
static_add_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate,
const char *ifname, u_char flags, u_char distance,
u_int32_t vrf_id);
extern int
static_delete_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate,
const char *ifname, u_char distance, u_int32_t vrf_id);
#endif /* HAVE_IPV6 */
#endif /*_ZEBRA_RIB_H */
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