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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 | * | |
896014f4 DL |
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 | |
718e3744 | 20 | */ |
21 | ||
22 | #ifndef _ZEBRA_OSPF_ROUTE_H | |
23 | #define _ZEBRA_OSPF_ROUTE_H | |
24 | ||
25 | #define OSPF_DESTINATION_ROUTER 1 | |
26 | #define OSPF_DESTINATION_NETWORK 2 | |
27 | #define OSPF_DESTINATION_DISCARD 3 | |
28 | ||
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 | |
35 | ||
b37eb79c OD |
36 | /* Segment Routing information to complement ospf_path structure */ |
37 | struct sr_nexthop_info { | |
38 | /* Output label associated to this route */ | |
39 | mpls_label_t label_out; | |
40 | /* | |
41 | * Pointer to SR Node which is the next hop for this route | |
42 | * or NULL if next hop is the destination of the prefix | |
43 | */ | |
44 | struct sr_node *nexthop; | |
7fd0729f G |
45 | |
46 | /* TI-LFA */ | |
47 | struct mpls_label_stack *backup_label_stack; | |
48 | struct in_addr backup_nexthop; | |
b37eb79c OD |
49 | }; |
50 | ||
718e3744 | 51 | /* OSPF Path. */ |
d62a17ae | 52 | struct ospf_path { |
53 | struct in_addr nexthop; | |
54 | struct in_addr adv_router; | |
55 | ifindex_t ifindex; | |
56 | unsigned char unnumbered; | |
b37eb79c | 57 | struct sr_nexthop_info srni; |
718e3744 | 58 | }; |
59 | ||
60 | /* Below is the structure linked to every | |
61 | route node. Note that for Network routing | |
62 | entries a single ospf_route is kept, while | |
63 | for ABRs and ASBRs (Router routing entries), | |
64 | we link an instance of ospf_router_route | |
65 | where a list of paths is maintained, so | |
66 | ||
67 | nr->info is a (struct ospf_route *) for OSPF_DESTINATION_NETWORK | |
68 | but | |
69 | nr->info is a (struct ospf_router_route *) for OSPF_DESTINATION_ROUTER | |
70 | */ | |
71 | ||
d62a17ae | 72 | struct route_standard { |
73 | /* Link Sate Origin. */ | |
74 | struct lsa_header *origin; | |
718e3744 | 75 | |
d62a17ae | 76 | /* Associated Area. */ |
77 | struct in_addr area_id; /* The area the route belongs to */ | |
718e3744 | 78 | |
d62a17ae | 79 | /* Area Type */ |
80 | int external_routing; | |
718e3744 | 81 | |
d62a17ae | 82 | /* Optional Capability. */ |
d7c0a89a | 83 | uint8_t options; /* Get from LSA header. */ |
718e3744 | 84 | |
d62a17ae | 85 | /* */ |
d7c0a89a | 86 | uint8_t flags; /* From router-LSA */ |
718e3744 | 87 | }; |
88 | ||
d62a17ae | 89 | struct route_external { |
90 | /* Link State Origin. */ | |
91 | struct ospf_lsa *origin; | |
718e3744 | 92 | |
d62a17ae | 93 | /* Link State Cost Type2. */ |
d7c0a89a | 94 | uint32_t type2_cost; |
718e3744 | 95 | |
d62a17ae | 96 | /* Tag value. */ |
d7c0a89a | 97 | uint32_t tag; |
718e3744 | 98 | |
d62a17ae | 99 | /* ASBR route. */ |
100 | struct ospf_route *asbr; | |
718e3744 | 101 | }; |
102 | ||
d62a17ae | 103 | struct ospf_route { |
104 | /* Destination Type. */ | |
d7c0a89a | 105 | uint8_t type; |
718e3744 | 106 | |
d62a17ae | 107 | /* Destination ID. */ /* i.e. Link State ID. */ |
108 | struct in_addr id; | |
718e3744 | 109 | |
d62a17ae | 110 | /* Address Mask. */ |
111 | struct in_addr mask; /* Only valid for networks. */ | |
718e3744 | 112 | |
d62a17ae | 113 | /* Path Type. */ |
d7c0a89a | 114 | uint8_t path_type; |
718e3744 | 115 | |
d62a17ae | 116 | /* List of Paths. */ |
117 | struct list *paths; | |
718e3744 | 118 | |
d62a17ae | 119 | /* Link State Cost. */ |
d7c0a89a | 120 | uint32_t cost; /* i.e. metric. */ |
718e3744 | 121 | |
d62a17ae | 122 | /* Route specific info. */ |
123 | union { | |
124 | struct route_standard std; | |
125 | struct route_external ext; | |
126 | } u; | |
effee187 DS |
127 | |
128 | bool changed; | |
718e3744 | 129 | }; |
130 | ||
5b5d66c4 | 131 | extern const char *ospf_path_type_name(int path_type); |
d62a17ae | 132 | extern struct ospf_path *ospf_path_new(void); |
133 | extern void ospf_path_free(struct ospf_path *); | |
134 | extern struct ospf_path *ospf_path_lookup(struct list *, struct ospf_path *); | |
135 | extern struct ospf_route *ospf_route_new(void); | |
136 | extern void ospf_route_free(struct ospf_route *); | |
b5a8894d | 137 | extern void ospf_route_delete(struct ospf *, struct route_table *); |
d62a17ae | 138 | extern void ospf_route_table_free(struct route_table *); |
4dadc291 | 139 | |
d62a17ae | 140 | extern void ospf_route_install(struct ospf *, struct route_table *); |
141 | extern void ospf_route_table_dump(struct route_table *); | |
b538baf3 | 142 | extern void ospf_router_route_table_dump(struct route_table *rt); |
4dadc291 | 143 | |
b538baf3 CH |
144 | extern void ospf_intra_add_router(struct route_table *rt, struct vertex *v, |
145 | struct ospf_area *area, bool add_all); | |
d62a17ae | 146 | |
147 | extern void ospf_intra_add_transit(struct route_table *, struct vertex *, | |
4dadc291 | 148 | struct ospf_area *); |
149 | ||
d62a17ae | 150 | extern void ospf_intra_add_stub(struct route_table *, struct router_lsa_link *, |
151 | struct vertex *, struct ospf_area *, | |
152 | int parent_is_root, int); | |
153 | ||
154 | extern int ospf_route_cmp(struct ospf *, struct ospf_route *, | |
155 | struct ospf_route *); | |
156 | extern void ospf_route_copy_nexthops(struct ospf_route *, struct list *); | |
1d376ff5 G |
157 | extern void ospf_route_copy_nexthops_from_vertex(struct ospf_area *area, |
158 | struct ospf_route *, | |
d62a17ae | 159 | struct vertex *); |
160 | ||
161 | extern void ospf_route_subst(struct route_node *, struct ospf_route *, | |
162 | struct ospf_route *); | |
163 | extern void ospf_route_add(struct route_table *, struct prefix_ipv4 *, | |
164 | struct ospf_route *, struct ospf_route *); | |
165 | ||
166 | extern void ospf_route_subst_nexthops(struct ospf_route *, struct list *); | |
167 | extern void ospf_prune_unreachable_networks(struct route_table *); | |
168 | extern void ospf_prune_unreachable_routers(struct route_table *); | |
b5a8894d CS |
169 | extern int ospf_add_discard_route(struct ospf *, struct route_table *, |
170 | struct ospf_area *, struct prefix_ipv4 *); | |
171 | extern void ospf_delete_discard_route(struct ospf *, struct route_table *, | |
d62a17ae | 172 | struct prefix_ipv4 *); |
173 | extern int ospf_route_match_same(struct route_table *, struct prefix_ipv4 *, | |
174 | struct ospf_route *); | |
731d0769 | 175 | |
718e3744 | 176 | #endif /* _ZEBRA_OSPF_ROUTE_H */ |