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896014f4bc
The FSF's address changed, and we had a mixture of comment styles for the GPL file header. (The style with * at the beginning won out with 580 to 141 in existing files.) Note: I've intentionally left intact other "variations" of the copyright header, e.g. whether it says "Zebra", "Quagga", "FRR", or nothing. Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
/*
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* OSPF calculation.
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* Copyright (C) 1999 Kunihiro Ishiguro
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*
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* This file is part of GNU Zebra.
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*
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* GNU Zebra is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* GNU Zebra is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; see the file COPYING; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _QUAGGA_OSPF_SPF_H
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#define _QUAGGA_OSPF_SPF_H
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/* values for vertex->type */
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#define OSPF_VERTEX_ROUTER 1 /* for a Router-LSA */
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#define OSPF_VERTEX_NETWORK 2 /* for a Network-LSA */
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/* values for vertex->flags */
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#define OSPF_VERTEX_PROCESSED 0x01
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/* The "root" is the node running the SPF calculation */
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/* A router or network in an area */
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struct vertex
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{
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u_char flags;
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u_char type; /* copied from LSA header */
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struct in_addr id; /* copied from LSA header */
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struct lsa_header *lsa; /* Router or Network LSA */
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int *stat; /* Link to LSA status. */
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u_int32_t distance; /* from root to this vertex */
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struct list *parents; /* list of parents in SPF tree */
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struct list *children; /* list of children in SPF tree*/
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};
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/* A nexthop taken on the root node to get to this (parent) vertex */
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struct vertex_nexthop
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{
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struct ospf_interface *oi; /* output intf on root node */
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struct in_addr router; /* router address to send to */
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};
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struct vertex_parent
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{
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struct vertex_nexthop *nexthop; /* link to nexthop info for this parent */
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struct vertex *parent; /* parent vertex */
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int backlink; /* index back to parent for router-lsa's */
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};
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/* What triggered the SPF ? */
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typedef enum {
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SPF_FLAG_ROUTER_LSA_INSTALL = 1,
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SPF_FLAG_NETWORK_LSA_INSTALL,
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SPF_FLAG_SUMMARY_LSA_INSTALL,
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SPF_FLAG_ASBR_SUMMARY_LSA_INSTALL,
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SPF_FLAG_MAXAGE,
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SPF_FLAG_ABR_STATUS_CHANGE,
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SPF_FLAG_ASBR_STATUS_CHANGE,
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SPF_FLAG_CONFIG_CHANGE,
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} ospf_spf_reason_t;
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extern void ospf_spf_calculate_schedule (struct ospf *, ospf_spf_reason_t);
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extern void ospf_rtrs_free (struct route_table *);
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/* void ospf_spf_calculate_timer_add (); */
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#endif /* _QUAGGA_OSPF_SPF_H */
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