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https://git.proxmox.com/git/mirror_frr
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d52ec5720f
More to come - these are just the most obvious and easy. Signed-off-by: David Lamparter <equinox@diac24.net>
108 lines
3.5 KiB
C
108 lines
3.5 KiB
C
/*
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* SRC-DEST Routing Table
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*
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* Copyright (C) 2017 by David Lamparter & Christian Franke,
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* Open Source Routing / NetDEF Inc.
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*
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* This file is part of FreeRangeRouting (FRR)
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*
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* FRR is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* FRR is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; see the file COPYING; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _ZEBRA_SRC_DEST_TABLE_H
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#define _ZEBRA_SRC_DEST_TABLE_H
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/* old/IPv4/non-srcdest:
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* table -> route_node .info -> [obj]
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*
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* new/IPv6/srcdest:
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* table -...-> srcdest_rnode [prefix = dest] .info -> [obj]
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* .src_table ->
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* srcdest table -...-> route_node [prefix = src] .info -> [obj]
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*
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* non-srcdest routes (src = ::/0) are treated just like before, their
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* information being directly there in the info pointer.
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*
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* srcdest routes are found by looking up destination first, then looking
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* up the source in the "src_table". src_table contains normal route_nodes,
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* whose prefix is the _source_ prefix.
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*
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* NB: info can be NULL on the destination rnode, if there are only srcdest
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* routes for a particular destination prefix.
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*/
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#include "prefix.h"
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#include "table.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define SRCDEST2STR_BUFFER (2*PREFIX2STR_BUFFER + sizeof(" from "))
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/* extended route node for IPv6 srcdest routing */
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struct srcdest_rnode;
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extern route_table_delegate_t _srcdest_dstnode_delegate;
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extern route_table_delegate_t _srcdest_srcnode_delegate;
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extern struct route_table *srcdest_table_init(void);
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extern struct route_node *srcdest_rnode_get(struct route_table *table,
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union prefixconstptr dst_pu,
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const struct prefix_ipv6 *src_p);
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extern struct route_node *srcdest_rnode_lookup(struct route_table *table,
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union prefixconstptr dst_pu,
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const struct prefix_ipv6 *src_p);
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extern void srcdest_rnode_prefixes(const struct route_node *rn,
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const struct prefix **p,
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const struct prefix **src_p);
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extern const char *srcdest2str(const struct prefix *dst_p,
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const struct prefix_ipv6 *src_p,
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char *str, int size);
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extern const char *srcdest_rnode2str(const struct route_node *rn, char *str,
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int size);
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extern struct route_node *srcdest_route_next(struct route_node *rn);
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static inline int rnode_is_dstnode(const struct route_node *rn)
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{
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return rn->table->delegate == &_srcdest_dstnode_delegate;
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}
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static inline int rnode_is_srcnode(const struct route_node *rn)
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{
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return rn->table->delegate == &_srcdest_srcnode_delegate;
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}
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static inline struct route_table *srcdest_rnode_table(struct route_node *rn)
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{
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if (rnode_is_srcnode(rn)) {
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struct route_node *dst_rn =
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(struct route_node *)route_table_get_info(rn->table);
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return dst_rn->table;
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} else {
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return rn->table;
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}
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}
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static inline void *srcdest_rnode_table_info(struct route_node *rn)
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{
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return route_table_get_info(srcdest_rnode_table(rn));
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ZEBRA_SRC_DEST_TABLE_H */
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