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 | * | |
| 19 | * You should have received a copy of the GNU General Public License | |
| 20 | * along with FRR; see the file COPYING. If not, write to the Free | |
| 21 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
| 22 | * 02111-1307, USA. | |
| 23 | */ | |
| 24 | ||
| 25 | #ifndef _ZEBRA_SRC_DEST_TABLE_H | |
| 26 | #define _ZEBRA_SRC_DEST_TABLE_H | |
| 27 | ||
| 28 | /* old/IPv4/non-srcdest: | |
| 29 | * table -> route_node .info -> [obj] | |
| 30 | * | |
| 31 | * new/IPv6/srcdest: | |
| 32 | * table -...-> srcdest_rnode [prefix = dest] .info -> [obj] | |
| 33 | * .src_table -> | |
| 34 | * srcdest table -...-> route_node [prefix = src] .info -> [obj] | |
| 35 | * | |
| 36 | * non-srcdest routes (src = ::/0) are treated just like before, their | |
| 37 | * information being directly there in the info pointer. | |
| 38 | * | |
| 39 | * srcdest routes are found by looking up destination first, then looking | |
| 40 | * up the source in the "src_table". src_table contains normal route_nodes, | |
| 41 | * whose prefix is the _source_ prefix. | |
| 42 | * | |
| 43 | * NB: info can be NULL on the destination rnode, if there are only srcdest | |
| 44 | * routes for a particular destination prefix. | |
| 45 | */ | |
| 46 | ||
| 47 | #include "prefix.h" | |
| 48 | #include "table.h" | |
| 49 | ||
| 50 | #define SRCDEST2STR_BUFFER (2*PREFIX2STR_BUFFER + sizeof(" from ")) | |
| 51 | ||
| 52 | /* extended route node for IPv6 srcdest routing */ | |
| 53 | struct srcdest_rnode; | |
| 54 | ||
| 55 | extern route_table_delegate_t _srcdest_dstnode_delegate; | |
| 56 | extern route_table_delegate_t _srcdest_srcnode_delegate; | |
| 57 | ||
| 58 | extern struct route_table *srcdest_table_init(void); | |
| 59 | extern struct route_node *srcdest_rnode_get(struct route_table *table, | |
| 78b81eaa | 60 | union prefixptr dst_pu, |
| 0964ad9c DL |
61 | struct prefix_ipv6 *src_p); |
| 62 | extern struct route_node *srcdest_rnode_lookup(struct route_table *table, | |
| 78b81eaa | 63 | union prefixptr dst_pu, |
| 0964ad9c DL |
64 | struct prefix_ipv6 *src_p); |
| 65 | extern void srcdest_rnode_prefixes (struct route_node *rn, struct prefix **p, | |
| 66 | struct prefix **src_p); | |
| 67 | extern const char *srcdest_rnode2str(struct route_node *rn, char *str, int size); | |
| 68 | extern struct route_node *srcdest_route_next(struct route_node *rn); | |
| 69 | ||
| 70 | static inline int | |
| 71 | rnode_is_dstnode (struct route_node *rn) | |
| 72 | { | |
| 73 | return rn->table->delegate == &_srcdest_dstnode_delegate; | |
| 74 | } | |
| 75 | ||
| 76 | static inline int | |
| 77 | rnode_is_srcnode (struct route_node *rn) | |
| 78 | { | |
| 79 | return rn->table->delegate == &_srcdest_srcnode_delegate; | |
| 80 | } | |
| 81 | ||
| 82 | static inline struct route_table * | |
| 83 | srcdest_rnode_table (struct route_node *rn) | |
| 84 | { | |
| 85 | if (rnode_is_srcnode (rn)) | |
| 86 | { | |
| 87 | struct route_node *dst_rn = rn->table->info; | |
| 88 | return dst_rn->table; | |
| 89 | } | |
| 90 | else | |
| 91 | { | |
| 92 | return rn->table; | |
| 93 | } | |
| 94 | } | |
| 95 | static inline void * | |
| 96 | srcdest_rnode_table_info (struct route_node *rn) | |
| 97 | { | |
| 98 | return srcdest_rnode_table(rn)->info; | |
| 99 | } | |
| 100 | ||
| 101 | #endif /* _ZEBRA_SRC_DEST_TABLE_H */ |