]>
Commit | Line | Data |
---|---|---|
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 | * | |
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 | |
20 | */ | |
21 | ||
22 | #ifndef _QUAGGA_OSPF_SPF_H | |
23 | #define _QUAGGA_OSPF_SPF_H | |
24 | ||
25 | #include "typesafe.h" | |
26 | ||
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 */ | |
30 | ||
31 | /* values for vertex->flags */ | |
32 | #define OSPF_VERTEX_PROCESSED 0x01 | |
33 | ||
34 | /* The "root" is the node running the SPF calculation */ | |
35 | ||
36 | PREDECL_SKIPLIST_NONUNIQ(vertex_pqueue) | |
37 | /* A router or network in an area */ | |
38 | struct vertex { | |
39 | struct vertex_pqueue_item pqi; | |
40 | uint8_t flags; | |
41 | uint8_t type; /* copied from LSA header */ | |
42 | struct in_addr id; /* copied from LSA header */ | |
43 | struct ospf_lsa *lsa_p; | |
44 | struct lsa_header *lsa; /* Router or Network LSA */ | |
45 | uint32_t distance; /* from root to this vertex */ | |
46 | struct list *parents; /* list of parents in SPF tree */ | |
47 | struct list *children; /* list of children in SPF tree*/ | |
48 | }; | |
49 | ||
50 | /* A nexthop taken on the root node to get to this (parent) vertex */ | |
51 | struct vertex_nexthop { | |
52 | struct ospf_interface *oi; /* output intf on root node */ | |
53 | struct in_addr router; /* router address to send to */ | |
54 | }; | |
55 | ||
56 | struct vertex_parent { | |
57 | struct vertex_nexthop | |
58 | *nexthop; /* link to nexthop info for this parent */ | |
59 | struct vertex *parent; /* parent vertex */ | |
60 | int backlink; /* index back to parent for router-lsa's */ | |
61 | }; | |
62 | ||
63 | /* What triggered the SPF ? */ | |
64 | typedef enum { | |
65 | SPF_FLAG_ROUTER_LSA_INSTALL = 1, | |
66 | SPF_FLAG_NETWORK_LSA_INSTALL, | |
67 | SPF_FLAG_SUMMARY_LSA_INSTALL, | |
68 | SPF_FLAG_ASBR_SUMMARY_LSA_INSTALL, | |
69 | SPF_FLAG_MAXAGE, | |
70 | SPF_FLAG_ABR_STATUS_CHANGE, | |
71 | SPF_FLAG_ASBR_STATUS_CHANGE, | |
72 | SPF_FLAG_CONFIG_CHANGE, | |
73 | } ospf_spf_reason_t; | |
74 | ||
75 | extern void ospf_spf_calculate_schedule(struct ospf *, ospf_spf_reason_t); | |
76 | extern void ospf_rtrs_free(struct route_table *); | |
77 | ||
78 | /* void ospf_spf_calculate_timer_add (); */ | |
79 | #endif /* _QUAGGA_OSPF_SPF_H */ |