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Diffstat (limited to '')
| -rw-r--r-- | ospfd/ospf_asbr.h | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/ospfd/ospf_asbr.h b/ospfd/ospf_asbr.h new file mode 100644 index 0000000..f7dbca7 --- /dev/null +++ b/ospfd/ospf_asbr.h @@ -0,0 +1,169 @@ +/* + * 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 { + struct ospf *ospf; + + /* 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(struct ospf *, 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, + uint16_t 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 */ |