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* ospf_lsa.h: New flag to the LSA structure for the SPF calculation.
[mirror_frr.git] / ospfd / ospf_spf.h
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
18 * along with GNU Zebra; see the file COPYING. If not, write to the Free
19 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20 * 02111-1307, USA.
21 */
22
23 /* values for vertex->type */
24 #define OSPF_VERTEX_ROUTER 1 /* for a Router-LSA */
25 #define OSPF_VERTEX_NETWORK 2 /* for a Network-LSA */
26
27 /* values for vertex->flags */
28 #define OSPF_VERTEX_PROCESSED 0x01
29
30 /* The "root" is the node running the SPF calculation */
31
32 /* A router or network in an area */
33 struct vertex
34 {
35 u_char flags;
36 u_char type; /* copied from LSA header */
37 struct in_addr id; /* copied from LSA header */
38 struct lsa_header *lsa; /* Router or Network LSA */
39 int * stat; /* Link to LSA status. */
40 u_int32_t distance; /* from root to this vertex */
41 int backlink; /* link index of back-link */
42 struct list *child; /* list of vertex: children in SPF tree*/
43 struct list *nexthop; /* list of vertex_nexthop from root to this vertex */
44 };
45
46 /* A nexthop taken on the root node to get to this (parent) vertex */
47 struct vertex_nexthop
48 {
49 struct ospf_interface *oi; /* output intf on root node */
50 struct in_addr router; /* router address to send to */
51 struct vertex *parent; /* parent in SPF tree */
52 };
53
54 void ospf_spf_calculate_schedule (struct ospf *);
55 void ospf_rtrs_free (struct route_table *);
56
57 /* void ospf_spf_calculate_timer_add (); */