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Implement NSSA address ranges as specified by RFC 3101: NSSA border routers may be configured with Type-7 address ranges. Each Type-7 address range is defined as an [address,mask] pair. Many separate Type-7 networks may fall into a single Type-7 address range, just as a subnetted network is composed of many separate subnets. NSSA border routers may aggregate Type-7 routes by advertising a single Type-5 LSA for each Type-7 address range. The Type-5 LSA resulting from a Type-7 address range match will be distributed to all Type-5 capable areas. Syntax: area A.B.C.D nssa range A.B.C.D/M [<not-advertise|cost (0-16777215)>] Example: router ospf router-id 1.1.1.1 area 1 nssa area 1 nssa range 172.16.0.0/16 area 1 nssa range 10.1.0.0/16 ! Since regular area ranges and NSSA ranges have a lot in common, this commit reuses the existing infrastructure for area ranges as much as possible to avoid code duplication. Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
97 lines
3.0 KiB
C
97 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* OSPF ABR functions.
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* Copyright (C) 1999 Alex Zinin
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*/
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#ifndef _ZEBRA_OSPF_ABR_H
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#define _ZEBRA_OSPF_ABR_H
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#define OSPF_ABR_TASK_DELAY 5
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#define OSPF_ABR_DNA_TIMER 10
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/* Delay in announceing Non-DNA routers
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* so that LSAs are completely synced
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* before generating indication LSAs.
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*/
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#define OSPF_AREA_RANGE_ADVERTISE (1 << 0)
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#define OSPF_AREA_RANGE_SUBSTITUTE (1 << 1)
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#define OSPF_AREA_RANGE_NSSA (1 << 2)
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/* Area range. */
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struct ospf_area_range {
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/* Area range address. */
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struct in_addr addr;
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/* Area range masklen. */
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uint8_t masklen;
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/* Flags. */
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uint8_t flags;
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/* Number of more specific prefixes. */
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int specifics;
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/* Addr and masklen to substitute. */
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struct in_addr subst_addr;
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uint8_t subst_masklen;
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/* Range cost. */
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uint32_t cost;
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/* Configured range cost. */
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uint32_t cost_config;
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};
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/* Prototypes. */
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extern struct ospf_area_range *ospf_area_range_lookup(struct ospf_area *,
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struct route_table *,
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struct prefix_ipv4 *);
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extern struct ospf_area_range *
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ospf_area_range_lookup_next(struct ospf_area *, struct in_addr *, int);
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extern int ospf_area_range_set(struct ospf *, struct ospf_area *,
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struct route_table *, struct prefix_ipv4 *, int,
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bool);
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extern int ospf_area_range_cost_set(struct ospf *, struct ospf_area *,
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struct route_table *, struct prefix_ipv4 *,
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uint32_t);
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extern int ospf_area_range_unset(struct ospf *, struct ospf_area *,
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struct route_table *, struct prefix_ipv4 *);
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extern int ospf_area_range_substitute_set(struct ospf *, struct ospf_area *,
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struct prefix_ipv4 *,
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struct prefix_ipv4 *);
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extern int ospf_area_range_substitute_unset(struct ospf *, struct ospf_area *,
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struct prefix_ipv4 *);
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extern struct ospf_area_range *ospf_area_range_match_any(struct ospf *,
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struct prefix_ipv4 *);
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extern int ospf_area_range_active(struct ospf_area_range *);
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extern int ospf_act_bb_connection(struct ospf *);
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extern void ospf_check_abr_status(struct ospf *);
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extern void ospf_abr_task(struct ospf *);
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extern void ospf_abr_nssa_task(struct ospf *ospf);
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extern void ospf_schedule_abr_task(struct ospf *);
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extern void ospf_abr_announce_network_to_area(struct prefix_ipv4 *, uint32_t,
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struct ospf_area *);
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extern void ospf_abr_nssa_type7_defaults(struct ospf *ospf);
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extern void ospf_abr_nssa_check_status(struct ospf *ospf);
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extern void ospf_abr_generate_indication_lsa(struct ospf *ospf,
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const struct ospf_area *area);
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extern void ospf_flush_indication_lsas(struct ospf *ospf);
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extern void ospf_generate_indication_lsa(struct ospf *ospf,
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struct ospf_area *area);
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extern bool ospf_check_fr_enabled_all(struct ospf *ospf);
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extern void ospf_recv_indication_lsa_flush(struct ospf_lsa *lsa);
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/** @brief Static inline functions.
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* @param Area pointer.
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* @return area Flood Reduction status.
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*/
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static inline bool ospf_check_area_fr_enabled(const struct ospf_area *area)
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{
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return area->fr_info.enabled ? true : false;
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}
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#endif /* _ZEBRA_OSPF_ABR_H */
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