projects / mirror_frr.git / blame
| Commit | Line | Data |
|---|---|---|
| 0964ad9c DL |
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); | |
| d62a17ae | 67 | extern const char *srcdest_rnode2str(struct route_node *rn, char *str, |
| 68 | int size); | |
| 0964ad9c DL |
69 | extern struct route_node *srcdest_route_next(struct route_node *rn); |
| 70 | ||
| d62a17ae | 71 | static inline int rnode_is_dstnode(struct route_node *rn) |
| 0964ad9c | 72 | { |
| d62a17ae | 73 | return rn->table->delegate == &_srcdest_dstnode_delegate; |
| 0964ad9c DL |
74 | } |
| 75 | ||
| d62a17ae | 76 | static inline int rnode_is_srcnode(struct route_node *rn) |
| 0964ad9c | 77 | { |
| d62a17ae | 78 | return rn->table->delegate == &_srcdest_srcnode_delegate; |
| 0964ad9c DL |
79 | } |
| 80 | ||
| d62a17ae | 81 | static inline struct route_table *srcdest_rnode_table(struct route_node *rn) |
| 0964ad9c | 82 | { |
| d62a17ae | 83 | if (rnode_is_srcnode(rn)) { |
| 84 | struct route_node *dst_rn = rn->table->info; | |
| 85 | return dst_rn->table; | |
| 86 | } else { | |
| 87 | return rn->table; | |
| 88 | } | |
| 0964ad9c | 89 | } |
| d62a17ae | 90 | static inline void *srcdest_rnode_table_info(struct route_node *rn) |
| 0964ad9c | 91 | { |
| d62a17ae | 92 | return srcdest_rnode_table(rn)->info; |
| 0964ad9c DL |
93 | } |
| 94 | ||
| 95 | #endif /* _ZEBRA_SRC_DEST_TABLE_H */ |