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3 * Copyright (C) 1999, 2000 Toshiaki Takada
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 _ZEBRA_OSPF_ROUTE_H
23 #define _ZEBRA_OSPF_ROUTE_H
25 #define OSPF_DESTINATION_ROUTER 1
26 #define OSPF_DESTINATION_NETWORK 2
27 #define OSPF_DESTINATION_DISCARD 3
29 #define OSPF_PATH_MIN 0
30 #define OSPF_PATH_INTRA_AREA 1
31 #define OSPF_PATH_INTER_AREA 2
32 #define OSPF_PATH_TYPE1_EXTERNAL 3
33 #define OSPF_PATH_TYPE2_EXTERNAL 4
34 #define OSPF_PATH_MAX 5
38 struct in_addr nexthop
;
39 struct in_addr adv_router
;
41 unsigned char unnumbered
;
44 /* Below is the structure linked to every
45 route node. Note that for Network routing
46 entries a single ospf_route is kept, while
47 for ABRs and ASBRs (Router routing entries),
48 we link an instance of ospf_router_route
49 where a list of paths is maintained, so
51 nr->info is a (struct ospf_route *) for OSPF_DESTINATION_NETWORK
53 nr->info is a (struct ospf_router_route *) for OSPF_DESTINATION_ROUTER
56 struct route_standard
{
57 /* Link Sate Origin. */
58 struct lsa_header
*origin
;
60 /* Associated Area. */
61 struct in_addr area_id
; /* The area the route belongs to */
66 /* Optional Capability. */
67 uint8_t options
; /* Get from LSA header. */
70 uint8_t flags
; /* From router-LSA */
73 struct route_external
{
74 /* Link State Origin. */
75 struct ospf_lsa
*origin
;
77 /* Link State Cost Type2. */
84 struct ospf_route
*asbr
;
88 /* Destination Type. */
91 /* Destination ID. */ /* i.e. Link State ID. */
95 struct in_addr mask
; /* Only valid for networks. */
103 /* Link State Cost. */
104 uint32_t cost
; /* i.e. metric. */
106 /* Route specific info. */
108 struct route_standard std
;
109 struct route_external ext
;
113 extern struct ospf_path
*ospf_path_new(void);
114 extern void ospf_path_free(struct ospf_path
*);
115 extern struct ospf_path
*ospf_path_lookup(struct list
*, struct ospf_path
*);
116 extern struct ospf_route
*ospf_route_new(void);
117 extern void ospf_route_free(struct ospf_route
*);
118 extern void ospf_route_delete(struct ospf
*, struct route_table
*);
119 extern void ospf_route_table_free(struct route_table
*);
121 extern void ospf_route_install(struct ospf
*, struct route_table
*);
122 extern void ospf_route_table_dump(struct route_table
*);
124 extern void ospf_intra_add_router(struct route_table
*, struct vertex
*,
127 extern void ospf_intra_add_transit(struct route_table
*, struct vertex
*,
130 extern void ospf_intra_add_stub(struct route_table
*, struct router_lsa_link
*,
131 struct vertex
*, struct ospf_area
*,
132 int parent_is_root
, int);
134 extern int ospf_route_cmp(struct ospf
*, struct ospf_route
*,
135 struct ospf_route
*);
136 extern void ospf_route_copy_nexthops(struct ospf_route
*, struct list
*);
137 extern void ospf_route_copy_nexthops_from_vertex(struct ospf_route
*,
140 extern void ospf_route_subst(struct route_node
*, struct ospf_route
*,
141 struct ospf_route
*);
142 extern void ospf_route_add(struct route_table
*, struct prefix_ipv4
*,
143 struct ospf_route
*, struct ospf_route
*);
145 extern void ospf_route_subst_nexthops(struct ospf_route
*, struct list
*);
146 extern void ospf_prune_unreachable_networks(struct route_table
*);
147 extern void ospf_prune_unreachable_routers(struct route_table
*);
148 extern int ospf_add_discard_route(struct ospf
*, struct route_table
*,
149 struct ospf_area
*, struct prefix_ipv4
*);
150 extern void ospf_delete_discard_route(struct ospf
*, struct route_table
*,
151 struct prefix_ipv4
*);
152 extern int ospf_route_match_same(struct route_table
*, struct prefix_ipv4
*,
153 struct ospf_route
*);
155 #endif /* _ZEBRA_OSPF_ROUTE_H */