3 * Copyright (C) 1999 Kunihiro Ishiguro
5 * This file is part of GNU Zebra.
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
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.
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
22 #ifndef _QUAGGA_OSPF_SPF_H
23 #define _QUAGGA_OSPF_SPF_H
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 */
31 /* values for vertex->flags */
32 #define OSPF_VERTEX_PROCESSED 0x01
34 /* The "root" is the node running the SPF calculation */
36 PREDECL_SKIPLIST_NONUNIQ(vertex_pqueue
)
37 /* A router or network in an area */
39 struct vertex_pqueue_item pqi
;
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*/
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 */
56 struct vertex_parent
{
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 */
63 /* What triggered the SPF ? */
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
,
70 SPF_FLAG_ABR_STATUS_CHANGE
,
71 SPF_FLAG_ASBR_STATUS_CHANGE
,
72 SPF_FLAG_CONFIG_CHANGE
,
75 extern void ospf_spf_calculate_schedule(struct ospf
*, ospf_spf_reason_t
);
76 extern void ospf_rtrs_free(struct route_table
*);
78 /* void ospf_spf_calculate_timer_add (); */
79 #endif /* _QUAGGA_OSPF_SPF_H */