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718e3744 | 1 | /* |
2 | * OSPF routing table. | |
3 | * Copyright (C) 1999, 2000 Toshiaki Takada | |
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 | #ifndef _ZEBRA_OSPF_ROUTE_H | |
24 | #define _ZEBRA_OSPF_ROUTE_H | |
25 | ||
26 | #define OSPF_DESTINATION_ROUTER 1 | |
27 | #define OSPF_DESTINATION_NETWORK 2 | |
28 | #define OSPF_DESTINATION_DISCARD 3 | |
29 | ||
30 | #define OSPF_PATH_MIN 0 | |
31 | #define OSPF_PATH_INTRA_AREA 1 | |
32 | #define OSPF_PATH_INTER_AREA 2 | |
33 | #define OSPF_PATH_TYPE1_EXTERNAL 3 | |
34 | #define OSPF_PATH_TYPE2_EXTERNAL 4 | |
35 | #define OSPF_PATH_MAX 5 | |
36 | ||
37 | /* OSPF Path. */ | |
38 | struct ospf_path | |
39 | { | |
40 | struct in_addr nexthop; | |
41 | struct in_addr adv_router; | |
42 | struct ospf_interface *oi; | |
43 | }; | |
44 | ||
45 | /* Below is the structure linked to every | |
46 | route node. Note that for Network routing | |
47 | entries a single ospf_route is kept, while | |
48 | for ABRs and ASBRs (Router routing entries), | |
49 | we link an instance of ospf_router_route | |
50 | where a list of paths is maintained, so | |
51 | ||
52 | nr->info is a (struct ospf_route *) for OSPF_DESTINATION_NETWORK | |
53 | but | |
54 | nr->info is a (struct ospf_router_route *) for OSPF_DESTINATION_ROUTER | |
55 | */ | |
56 | ||
57 | struct route_standard | |
58 | { | |
59 | /* Link Sate Origin. */ | |
60 | struct lsa_header *origin; | |
61 | ||
62 | /* Associated Area. */ | |
63 | struct in_addr area_id; /* The area the route belongs to */ | |
64 | ||
718e3744 | 65 | /* Area Type */ |
66 | int external_routing; | |
718e3744 | 67 | |
68 | /* Optional Capability. */ | |
69 | u_char options; /* Get from LSA header. */ | |
70 | ||
71 | /* */ | |
72 | u_char flags; /* From router-LSA */ | |
73 | }; | |
74 | ||
75 | struct route_external | |
76 | { | |
77 | /* Link State Origin. */ | |
78 | struct ospf_lsa *origin; | |
79 | ||
80 | /* Link State Cost Type2. */ | |
81 | u_int32_t type2_cost; | |
82 | ||
83 | /* Tag value. */ | |
84 | u_int32_t tag; | |
85 | ||
86 | /* ASBR route. */ | |
87 | struct ospf_route *asbr; | |
88 | }; | |
89 | ||
90 | struct ospf_route | |
91 | { | |
92 | /* Create time. */ | |
93 | time_t ctime; | |
94 | ||
95 | /* Modified time. */ | |
96 | time_t mtime; | |
97 | ||
98 | /* Destination Type. */ | |
99 | u_char type; | |
100 | ||
101 | /* Destination ID. */ /* i.e. Link State ID. */ | |
102 | struct in_addr id; | |
103 | ||
104 | /* Address Mask. */ | |
105 | struct in_addr mask; /* Only valid for networks. */ | |
106 | ||
107 | /* Path Type. */ | |
108 | u_char path_type; | |
109 | ||
110 | /* List of Paths. */ | |
96735eea | 111 | list paths; |
718e3744 | 112 | |
113 | /* Link State Cost. */ | |
114 | u_int32_t cost; /* i.e. metric. */ | |
115 | ||
116 | /* Route specific info. */ | |
117 | union | |
118 | { | |
119 | struct route_standard std; | |
120 | struct route_external ext; | |
121 | } u; | |
122 | }; | |
123 | ||
124 | struct ospf_path *ospf_path_new (); | |
96735eea | 125 | void ospf_path_free (struct ospf_path *); |
718e3744 | 126 | struct ospf_path *ospf_path_lookup (list, struct ospf_path *); |
127 | struct ospf_route *ospf_route_new (); | |
96735eea | 128 | void ospf_route_free (struct ospf_route *); |
129 | void ospf_route_delete (struct route_table *); | |
130 | void ospf_route_table_free (struct route_table *); | |
718e3744 | 131 | |
96735eea | 132 | void ospf_route_install (struct ospf *, struct route_table *); |
718e3744 | 133 | void ospf_route_table_dump (struct route_table *); |
134 | ||
135 | void ospf_intra_add_router (struct route_table *, struct vertex *, | |
136 | struct ospf_area *); | |
137 | ||
138 | void ospf_intra_add_transit (struct route_table *, struct vertex *, | |
139 | struct ospf_area *); | |
140 | ||
141 | void ospf_intra_add_stub (struct route_table *, struct router_lsa_link *, | |
142 | struct vertex *, struct ospf_area *); | |
143 | ||
96735eea | 144 | int ospf_route_cmp (struct ospf *, struct ospf_route *, struct ospf_route *); |
718e3744 | 145 | void ospf_route_copy_nexthops (struct ospf_route *, list); |
146 | void ospf_route_copy_nexthops_from_vertex (struct ospf_route *, | |
147 | struct vertex * ); | |
148 | ||
149 | void ospf_route_subst (struct route_node *, struct ospf_route *, | |
150 | struct ospf_route *); | |
151 | void ospf_route_add (struct route_table *, struct prefix_ipv4 *, | |
152 | struct ospf_route *, struct ospf_route *); | |
153 | ||
154 | void ospf_route_subst_nexthops (struct ospf_route *, list); | |
155 | void ospf_prune_unreachable_networks (struct route_table *); | |
156 | void ospf_prune_unreachable_routers (struct route_table *); | |
157 | int ospf_add_discard_route (struct route_table *, struct ospf_area *, | |
158 | struct prefix_ipv4 *); | |
159 | void ospf_delete_discard_route (struct prefix_ipv4 *); | |
160 | int ospf_route_match_same (struct route_table *, struct prefix_ipv4 *, | |
161 | struct ospf_route *); | |
162 | ||
163 | #endif /* _ZEBRA_OSPF_ROUTE_H */ |