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1 | /* |
2 | * SRC-DEST Routing Table | |
3 | * | |
4 | * Copyright (C) 2017 by David Lamparter & Christian Franke, | |
5 | * Open Source Routing / NetDEF Inc. | |
6 | * | |
7 | * This file is part of FreeRangeRouting (FRR) | |
8 | * | |
9 | * FRR is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2, or (at your option) any | |
12 | * later version. | |
13 | * | |
14 | * FRR is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
896014f4 DL |
19 | * You should have received a copy of the GNU General Public License along |
20 | * with this program; see the file COPYING; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
0964ad9c DL |
22 | */ |
23 | ||
24 | #ifndef _ZEBRA_SRC_DEST_TABLE_H | |
25 | #define _ZEBRA_SRC_DEST_TABLE_H | |
26 | ||
27 | /* old/IPv4/non-srcdest: | |
28 | * table -> route_node .info -> [obj] | |
29 | * | |
30 | * new/IPv6/srcdest: | |
31 | * table -...-> srcdest_rnode [prefix = dest] .info -> [obj] | |
32 | * .src_table -> | |
33 | * srcdest table -...-> route_node [prefix = src] .info -> [obj] | |
34 | * | |
35 | * non-srcdest routes (src = ::/0) are treated just like before, their | |
36 | * information being directly there in the info pointer. | |
37 | * | |
38 | * srcdest routes are found by looking up destination first, then looking | |
39 | * up the source in the "src_table". src_table contains normal route_nodes, | |
40 | * whose prefix is the _source_ prefix. | |
41 | * | |
42 | * NB: info can be NULL on the destination rnode, if there are only srcdest | |
43 | * routes for a particular destination prefix. | |
44 | */ | |
45 | ||
46 | #include "prefix.h" | |
47 | #include "table.h" | |
48 | ||
49 | #define SRCDEST2STR_BUFFER (2*PREFIX2STR_BUFFER + sizeof(" from ")) | |
50 | ||
51 | /* extended route node for IPv6 srcdest routing */ | |
52 | struct srcdest_rnode; | |
53 | ||
54 | extern route_table_delegate_t _srcdest_dstnode_delegate; | |
55 | extern route_table_delegate_t _srcdest_srcnode_delegate; | |
56 | ||
57 | extern struct route_table *srcdest_table_init(void); | |
58 | extern struct route_node *srcdest_rnode_get(struct route_table *table, | |
86391e56 MS |
59 | union prefixconstptr dst_pu, |
60 | const struct prefix_ipv6 *src_p); | |
0964ad9c | 61 | extern struct route_node *srcdest_rnode_lookup(struct route_table *table, |
86391e56 MS |
62 | union prefixconstptr dst_pu, |
63 | const struct prefix_ipv6 *src_p); | |
64 | extern void srcdest_rnode_prefixes(struct route_node *rn, | |
65 | const struct prefix **p, | |
66 | const struct prefix **src_p); | |
321c1bbb CF |
67 | extern const char *srcdest2str(const struct prefix *dst_p, |
68 | const struct prefix_ipv6 *src_p, | |
69 | char *str, int size); | |
d62a17ae | 70 | extern const char *srcdest_rnode2str(struct route_node *rn, char *str, |
71 | int size); | |
0964ad9c DL |
72 | extern struct route_node *srcdest_route_next(struct route_node *rn); |
73 | ||
d62a17ae | 74 | static inline int rnode_is_dstnode(struct route_node *rn) |
0964ad9c | 75 | { |
d62a17ae | 76 | return rn->table->delegate == &_srcdest_dstnode_delegate; |
0964ad9c DL |
77 | } |
78 | ||
d62a17ae | 79 | static inline int rnode_is_srcnode(struct route_node *rn) |
0964ad9c | 80 | { |
d62a17ae | 81 | return rn->table->delegate == &_srcdest_srcnode_delegate; |
0964ad9c DL |
82 | } |
83 | ||
d62a17ae | 84 | static inline struct route_table *srcdest_rnode_table(struct route_node *rn) |
0964ad9c | 85 | { |
d62a17ae | 86 | if (rnode_is_srcnode(rn)) { |
87 | struct route_node *dst_rn = rn->table->info; | |
88 | return dst_rn->table; | |
89 | } else { | |
90 | return rn->table; | |
91 | } | |
0964ad9c | 92 | } |
d62a17ae | 93 | static inline void *srcdest_rnode_table_info(struct route_node *rn) |
0964ad9c | 94 | { |
d62a17ae | 95 | return srcdest_rnode_table(rn)->info; |
0964ad9c DL |
96 | } |
97 | ||
98 | #endif /* _ZEBRA_SRC_DEST_TABLE_H */ |