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718e3744 | 1 | /* |
2 | * OSPF calculation. | |
3 | * Copyright (C) 1999 Kunihiro Ishiguro | |
4 | * | |
5 | * This file is part of GNU Zebra. | |
6 | * | |
7 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * GNU Zebra is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
896014f4 DL |
17 | * You should have received a copy of the GNU General Public License along |
18 | * with this program; see the file COPYING; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 20 | */ |
21 | ||
9c27ef9b PJ |
22 | #ifndef _QUAGGA_OSPF_SPF_H |
23 | #define _QUAGGA_OSPF_SPF_H | |
24 | ||
c971918a DL |
25 | #include "typesafe.h" |
26 | ||
630e4807 | 27 | /* values for vertex->type */ |
28 | #define OSPF_VERTEX_ROUTER 1 /* for a Router-LSA */ | |
29 | #define OSPF_VERTEX_NETWORK 2 /* for a Network-LSA */ | |
718e3744 | 30 | |
630e4807 | 31 | /* values for vertex->flags */ |
718e3744 | 32 | #define OSPF_VERTEX_PROCESSED 0x01 |
33 | ||
630e4807 | 34 | /* The "root" is the node running the SPF calculation */ |
718e3744 | 35 | |
960b9a53 | 36 | PREDECL_SKIPLIST_NONUNIQ(vertex_pqueue); |
630e4807 | 37 | /* A router or network in an area */ |
d62a17ae | 38 | struct vertex { |
c971918a | 39 | struct vertex_pqueue_item pqi; |
d7c0a89a QY |
40 | uint8_t flags; |
41 | uint8_t type; /* copied from LSA header */ | |
d62a17ae | 42 | struct in_addr id; /* copied from LSA header */ |
c971918a | 43 | struct ospf_lsa *lsa_p; |
d62a17ae | 44 | struct lsa_header *lsa; /* Router or Network LSA */ |
d7c0a89a | 45 | uint32_t distance; /* from root to this vertex */ |
d62a17ae | 46 | struct list *parents; /* list of parents in SPF tree */ |
47 | struct list *children; /* list of children in SPF tree*/ | |
718e3744 | 48 | }; |
49 | ||
d62a17ae | 50 | struct vertex_nexthop { |
d62a17ae | 51 | struct in_addr router; /* router address to send to */ |
1d376ff5 | 52 | int lsa_pos; /* LSA position for resolving the interface */ |
eb3da6df | 53 | }; |
54 | ||
d62a17ae | 55 | struct vertex_parent { |
7fd0729f G |
56 | struct vertex_nexthop *nexthop; /* nexthop taken on the root node */ |
57 | struct vertex_nexthop *local_nexthop; /* local nexthop of the parent */ | |
58 | struct vertex *parent; /* parent vertex */ | |
1d376ff5 | 59 | int backlink; /* index back to parent for router-lsa's */ |
718e3744 | 60 | }; |
61 | ||
d3a9c768 PJ |
62 | /* What triggered the SPF ? */ |
63 | typedef enum { | |
d62a17ae | 64 | SPF_FLAG_ROUTER_LSA_INSTALL = 1, |
65 | SPF_FLAG_NETWORK_LSA_INSTALL, | |
66 | SPF_FLAG_SUMMARY_LSA_INSTALL, | |
67 | SPF_FLAG_ASBR_SUMMARY_LSA_INSTALL, | |
68 | SPF_FLAG_MAXAGE, | |
69 | SPF_FLAG_ABR_STATUS_CHANGE, | |
70 | SPF_FLAG_ASBR_STATUS_CHANGE, | |
71 | SPF_FLAG_CONFIG_CHANGE, | |
10514170 | 72 | SPF_FLAG_GR_FINISH, |
d3a9c768 PJ |
73 | } ospf_spf_reason_t; |
74 | ||
d62a17ae | 75 | extern void ospf_spf_calculate_schedule(struct ospf *, ospf_spf_reason_t); |
1d376ff5 G |
76 | extern void ospf_spf_calculate(struct ospf_area *area, |
77 | struct ospf_lsa *root_lsa, | |
78 | struct route_table *new_table, | |
6fc9528e G |
79 | struct route_table *new_rtrs, bool is_dry_run, |
80 | bool is_root_node); | |
7fd0729f | 81 | extern void ospf_spf_calculate_area(struct ospf *ospf, struct ospf_area *area, |
1d376ff5 | 82 | struct route_table *new_table, |
7fd0729f G |
83 | struct route_table *new_rtrs); |
84 | extern void ospf_spf_calculate_areas(struct ospf *ospf, | |
85 | struct route_table *new_table, | |
86 | struct route_table *new_rtrs); | |
d62a17ae | 87 | extern void ospf_rtrs_free(struct route_table *); |
81443a28 | 88 | extern void ospf_spf_cleanup(struct vertex *spf, struct list *vertex_list); |
7fd0729f | 89 | extern void ospf_spf_copy(struct vertex *vertex, struct list *vertex_list); |
385a1e07 G |
90 | extern void ospf_spf_remove_resource(struct vertex *vertex, |
91 | struct list *vertex_list, | |
92 | struct protected_resource *resource); | |
7fd0729f G |
93 | extern struct vertex *ospf_spf_vertex_find(struct in_addr id, |
94 | struct list *vertex_list); | |
385a1e07 G |
95 | extern struct vertex *ospf_spf_vertex_by_nexthop(struct vertex *root, |
96 | struct in_addr *nexthop); | |
cc1725bd G |
97 | extern struct vertex_parent *ospf_spf_vertex_parent_find(struct in_addr id, |
98 | struct vertex *vertex); | |
7fd0729f | 99 | extern int vertex_parent_cmp(void *aa, void *bb); |
718e3744 | 100 | |
3a76b1be | 101 | extern void ospf_spf_print(struct vty *vty, struct vertex *v, int i); |
3d5b9855 | 102 | extern void ospf_restart_spf(struct ospf *ospf); |
718e3744 | 103 | /* void ospf_spf_calculate_timer_add (); */ |
9c27ef9b | 104 | #endif /* _QUAGGA_OSPF_SPF_H */ |