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ospf_asbr.h
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/*
* OSPF AS Boundary Router functions.
* Copyright (C) 1999, 2000 Kunihiro Ishiguro, Toshiaki Takada
*
* 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 this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _ZEBRA_OSPF_ASBR_H
#define _ZEBRA_OSPF_ASBR_H
struct route_map_set_values {
int32_t metric;
int32_t metric_type;
};
/* Redistributed external information. */
struct external_info {
/* Type of source protocol. */
uint8_t type;
unsigned short instance;
/* Prefix. */
struct prefix_ipv4 p;
/* Interface index. */
ifindex_t ifindex;
/* Nexthop address. */
struct in_addr nexthop;
/* Additional Route tag. */
route_tag_t tag;
/* Actual tag received from zebra*/
route_tag_t orig_tag;
struct route_map_set_values route_map_set;
#define ROUTEMAP_METRIC(E) (E)->route_map_set.metric
#define ROUTEMAP_METRIC_TYPE(E) (E)->route_map_set.metric_type
/* Back pointer to summary address */
struct ospf_external_aggr_rt *aggr_route;
/* To identify the routes to be originated
* after a summary address deletion.
*/
bool to_be_processed;
};
#define OSPF_EXTL_AGGR_DEFAULT_DELAY 5
#define OSPF_EXTERNAL_RT_COUNT(aggr) \
(((struct ospf_external_aggr_rt *)aggr)->match_extnl_hash->count)
enum ospf_aggr_action_t {
OSPF_ROUTE_AGGR_NONE = 0,
OSPF_ROUTE_AGGR_ADD,
OSPF_ROUTE_AGGR_DEL,
OSPF_ROUTE_AGGR_MODIFY
};
#define OSPF_SUCCESS 1
#define OSPF_FAILURE 0
#define OSPF_INVALID -1
#define OSPF_EXTERNAL_AGGRT_NO_ADVERTISE 0x1
#define OSPF_EXTERNAL_AGGRT_ORIGINATED 0x2
/* Data structures for external route aggregator */
struct ospf_external_aggr_rt {
/* Prefix. */
struct prefix_ipv4 p;
/* Bit 1 : Dont advertise.
* Bit 2 : Originated as Type-5
*/
uint8_t flags;
/* Tag for summary route */
route_tag_t tag;
/* Action to be done at the delay
* timer expairy.
*/
enum ospf_aggr_action_t action;
/* Hash Table of external routes */
struct hash *match_extnl_hash;
};
#define OSPF_ASBR_CHECK_DELAY 30
#define OSPF_ASBR_NSSA_REDIST_UPDATE_DELAY 9
extern void ospf_external_route_remove(struct ospf *, struct prefix_ipv4 *);
extern struct external_info *ospf_external_info_new(uint8_t, unsigned short);
extern void ospf_reset_route_map_set_values(struct route_map_set_values *);
extern int ospf_route_map_set_compare(struct route_map_set_values *,
struct route_map_set_values *);
extern struct external_info *ospf_external_info_add(struct ospf *, uint8_t,
unsigned short,
struct prefix_ipv4,
ifindex_t, struct in_addr,
route_tag_t);
extern void ospf_external_info_delete(struct ospf *, uint8_t, unsigned short,
struct prefix_ipv4);
extern struct external_info *ospf_external_info_lookup(struct ospf *, uint8_t,
unsigned short,
struct prefix_ipv4 *);
extern void ospf_asbr_status_update(struct ospf *, uint8_t);
extern void ospf_schedule_asbr_nssa_redist_update(struct ospf *ospf);
extern void ospf_redistribute_withdraw(struct ospf *, uint8_t, unsigned short);
extern void ospf_asbr_check(void);
extern void ospf_schedule_asbr_check(void);
extern void ospf_asbr_route_install_lsa(struct ospf_lsa *);
extern struct ospf_lsa *ospf_external_info_find_lsa(struct ospf *,
struct prefix_ipv4 *p);
/* External Route Aggregator */
extern void ospf_asbr_external_aggregator_init(struct ospf *instance);
extern void ospf_external_aggregator_free(struct ospf_external_aggr_rt *aggr);
extern bool is_valid_summary_addr(struct prefix_ipv4 *p);
extern struct ospf_external_aggr_rt *
ospf_external_aggr_match(struct ospf *ospf, struct prefix_ipv4 *p);
extern void ospf_unlink_ei_from_aggr(struct ospf *ospf,
struct ospf_external_aggr_rt *aggr,
struct external_info *ei);
extern struct ospf_lsa *
ospf_originate_summary_lsa(struct ospf *ospf,
struct ospf_external_aggr_rt *aggr,
struct external_info *ei);
extern int ospf_external_aggregator_timer_set(struct ospf *ospf,
unsigned int interval);
extern void ospf_external_aggrigator_free(struct ospf_external_aggr_rt *aggr);
extern struct ospf_external_aggr_rt *
ospf_extrenal_aggregator_lookup(struct ospf *ospf, struct prefix_ipv4 *p);
void ospf_unset_all_aggr_flag(struct ospf *ospf);
extern int ospf_asbr_external_aggregator_set(struct ospf *ospf,
struct prefix_ipv4 *p,
route_tag_t tag);
extern int ospf_asbr_external_aggregator_unset(struct ospf *ospf,
struct prefix_ipv4 *p,
route_tag_t tag);
extern int ospf_asbr_external_rt_no_advertise(struct ospf *ospf,
struct prefix_ipv4 *p);
extern int ospf_asbr_external_rt_advertise(struct ospf *ospf,
struct prefix_ipv4 *p);
#endif /* _ZEBRA_OSPF_ASBR_H */