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0077aab4f9
have one machine publishing a route to 10.1.1.3/32 and another one publishing a route to 10.1.1.4/32. If the first machine went down the route to 10.1.1.4/32 was wrongly killed by the old code, leading either to missing routes or worse to bug()s like "Router parent does not have next hop" or just segfaults. The patch fixes this but in the long term a redesign is required here. Note that the patch doesn't worse the situation, instead it prevents the problems stated. The redesign is required to handle multiple routes to small subnets properly. (by Andreas) Feela, I think that this is at least a good temporary fix, but it's of course up to you to decide.
61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
/*
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* BIRD -- OSPF
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*
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* (c) 1999 - 2000 Ondrej Filip <feela@network.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#ifndef _BIRD_OSPF_TOPOLOGY_H_
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#define _BIRD_OSPF_TOPOLOGY_H_
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struct top_hash_entry { /* Index for fast mapping (type,rtrid,LSid)->vertex */
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snode n;
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node cn; /* For adding into list of candidates
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* in intra-area routing table
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* calculation
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*/
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struct top_hash_entry *next; /* Next in hash chain */
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struct ospf_lsa_header lsa;
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void *lsa_body;
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bird_clock_t inst_t; /* Time of installation into DB */
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ip_addr nh; /* Next hop */
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struct iface *nhi;
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u16 dist; /* Distance from the root */
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u16 ini_age;
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u8 color;
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#define OUTSPF 0
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#define CANDIDATE 1
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#define INSPF 2
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u8 padding;
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u16 padding2;
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};
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struct top_graph {
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pool *pool; /* Pool we allocate from */
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slab *hash_slab; /* Slab for hash entries */
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struct top_hash_entry **hash_table; /* Hashing (modelled a`la fib) */
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unsigned int hash_size;
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unsigned int hash_order;
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unsigned int hash_mask;
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unsigned int hash_entries;
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unsigned int hash_entries_min, hash_entries_max;
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};
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struct top_graph *ospf_top_new(struct proto_ospf *);
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void ospf_top_free(struct top_graph *);
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void ospf_top_dump(struct top_graph *, struct proto *);
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struct top_hash_entry *ospf_hash_find_header(struct top_graph *f, struct ospf_lsa_header *h);
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struct top_hash_entry *ospf_hash_get_header(struct top_graph *f, struct ospf_lsa_header *h);
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struct top_hash_entry *ospf_hash_find(struct top_graph *, u32 lsa, u32 rtr, u32 type);
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struct top_hash_entry *ospf_hash_get(struct top_graph *, u32 lsa, u32 rtr, u32 type);
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void ospf_hash_delete(struct top_graph *, struct top_hash_entry *);
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void addifa_rtlsa(struct ospf_iface *ifa);
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void originate_rt_lsa(struct ospf_area *oa);
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void originate_net_lsa(struct ospf_iface *ifa);
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int can_flush_lsa(struct ospf_area *oa);
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int max_ext_lsa(unsigned pxlen);
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void originate_ext_lsa(net *n, rte *e, struct proto_ospf *po, struct ea_list *attrs);
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#endif /* _BIRD_OSPF_TOPOLOGY_H_ */
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