diff options
Diffstat (limited to 'ospfd/ospf_spf.h')
| -rw-r--r-- | ospfd/ospf_spf.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/ospfd/ospf_spf.h b/ospfd/ospf_spf.h new file mode 100644 index 0000000..834bfd0 --- /dev/null +++ b/ospfd/ospf_spf.h @@ -0,0 +1,107 @@ +/* + * OSPF calculation. + * Copyright (C) 1999 Kunihiro Ishiguro + * + * This file is part of GNU Zebra. + * + * GNU Zebra is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * GNU Zebra is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; see the file COPYING; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef _QUAGGA_OSPF_SPF_H +#define _QUAGGA_OSPF_SPF_H + +#include "typesafe.h" + +/* values for vertex->type */ +#define OSPF_VERTEX_ROUTER 1 /* for a Router-LSA */ +#define OSPF_VERTEX_NETWORK 2 /* for a Network-LSA */ + +/* values for vertex->flags */ +#define OSPF_VERTEX_PROCESSED 0x01 + +/* The "root" is the node running the SPF calculation */ + +PREDECL_SKIPLIST_NONUNIQ(vertex_pqueue); +/* A router or network in an area */ +struct vertex { + struct vertex_pqueue_item pqi; + uint8_t flags; + uint8_t type; /* copied from LSA header */ + struct in_addr id; /* copied from LSA header */ + struct ospf_lsa *lsa_p; + struct lsa_header *lsa; /* Router or Network LSA */ + uint32_t distance; /* from root to this vertex */ + struct list *parents; /* list of parents in SPF tree */ + struct list *children; /* list of children in SPF tree*/ +}; + +struct vertex_nexthop { + struct in_addr router; /* router address to send to */ + int lsa_pos; /* LSA position for resolving the interface */ +}; + +struct vertex_parent { + struct vertex_nexthop *nexthop; /* nexthop taken on the root node */ + struct vertex_nexthop *local_nexthop; /* local nexthop of the parent */ + struct vertex *parent; /* parent vertex */ + int backlink; /* index back to parent for router-lsa's */ +}; + +/* What triggered the SPF ? */ +typedef enum { + SPF_FLAG_ROUTER_LSA_INSTALL = 1, + SPF_FLAG_NETWORK_LSA_INSTALL, + SPF_FLAG_SUMMARY_LSA_INSTALL, + SPF_FLAG_ASBR_SUMMARY_LSA_INSTALL, + SPF_FLAG_MAXAGE, + SPF_FLAG_ABR_STATUS_CHANGE, + SPF_FLAG_ASBR_STATUS_CHANGE, + SPF_FLAG_CONFIG_CHANGE, + SPF_FLAG_GR_FINISH, +} ospf_spf_reason_t; + +extern void ospf_spf_calculate_schedule(struct ospf *, ospf_spf_reason_t); +extern void ospf_spf_calculate(struct ospf_area *area, + struct ospf_lsa *root_lsa, + struct route_table *new_table, + struct route_table *all_rtrs, + struct route_table *new_rtrs, bool is_dry_run, + bool is_root_node); +extern void ospf_spf_calculate_area(struct ospf *ospf, struct ospf_area *area, + struct route_table *new_table, + struct route_table *all_rtrs, + struct route_table *new_rtrs); +extern void ospf_spf_calculate_areas(struct ospf *ospf, + struct route_table *new_table, + struct route_table *all_rtrs, + struct route_table *new_rtrs); +extern void ospf_rtrs_free(struct route_table *); +extern void ospf_spf_cleanup(struct vertex *spf, struct list *vertex_list); +extern void ospf_spf_copy(struct vertex *vertex, struct list *vertex_list); +extern void ospf_spf_remove_resource(struct vertex *vertex, + struct list *vertex_list, + struct protected_resource *resource); +extern struct vertex *ospf_spf_vertex_find(struct in_addr id, + struct list *vertex_list); +extern struct vertex *ospf_spf_vertex_by_nexthop(struct vertex *root, + struct in_addr *nexthop); +extern struct vertex_parent *ospf_spf_vertex_parent_find(struct in_addr id, + struct vertex *vertex); +extern int vertex_parent_cmp(void *aa, void *bb); + +extern void ospf_spf_print(struct vty *vty, struct vertex *v, int i); +extern void ospf_restart_spf(struct ospf *ospf); +/* void ospf_spf_calculate_timer_add (); */ +#endif /* _QUAGGA_OSPF_SPF_H */ |