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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* SRC-DEST Routing Table
*
* Copyright (C) 2017 by David Lamparter & Christian Franke,
* Open Source Routing / NetDEF Inc.
*
* This file is part of FRRouting (FRR)
*/
#ifndef _ZEBRA_SRC_DEST_TABLE_H
#define _ZEBRA_SRC_DEST_TABLE_H
/* old/IPv4/non-srcdest:
* table -> route_node .info -> [obj]
*
* new/IPv6/srcdest:
* table -...-> srcdest_rnode [prefix = dest] .info -> [obj]
* .src_table ->
* srcdest table -...-> route_node [prefix = src] .info -> [obj]
*
* non-srcdest routes (src = ::/0) are treated just like before, their
* information being directly there in the info pointer.
*
* srcdest routes are found by looking up destination first, then looking
* up the source in the "src_table". src_table contains normal route_nodes,
* whose prefix is the _source_ prefix.
*
* NB: info can be NULL on the destination rnode, if there are only srcdest
* routes for a particular destination prefix.
*/
#include "prefix.h"
#include "table.h"
#ifdef __cplusplus
extern "C" {
#endif
#define SRCDEST2STR_BUFFER (2*PREFIX2STR_BUFFER + sizeof(" from "))
/* extended route node for IPv6 srcdest routing */
struct srcdest_rnode;
extern route_table_delegate_t _srcdest_dstnode_delegate;
extern route_table_delegate_t _srcdest_srcnode_delegate;
extern struct route_table *srcdest_table_init(void);
extern struct route_node *srcdest_rnode_get(struct route_table *table,
union prefixconstptr dst_pu,
const struct prefix_ipv6 *src_p);
extern struct route_node *srcdest_rnode_lookup(struct route_table *table,
union prefixconstptr dst_pu,
const struct prefix_ipv6 *src_p);
extern void srcdest_rnode_prefixes(const struct route_node *rn,
const struct prefix **p,
const struct prefix **src_p);
extern const char *srcdest2str(const struct prefix *dst_p,
const struct prefix_ipv6 *src_p,
char *str, int size);
extern const char *srcdest_rnode2str(const struct route_node *rn, char *str,
int size);
extern struct route_node *srcdest_route_next(struct route_node *rn);
static inline int rnode_is_dstnode(const struct route_node *rn)
{
return rn->table->delegate == &_srcdest_dstnode_delegate;
}
static inline int rnode_is_srcnode(const struct route_node *rn)
{
return rn->table->delegate == &_srcdest_srcnode_delegate;
}
static inline struct route_table *srcdest_rnode_table(struct route_node *rn)
{
if (rnode_is_srcnode(rn)) {
struct route_node *dst_rn =
(struct route_node *)route_table_get_info(rn->table);
return dst_rn->table;
} else {
return rn->table;
}
}
static inline void *srcdest_rnode_table_info(struct route_node *rn)
{
return route_table_get_info(srcdest_rnode_table(rn));
}
extern struct route_table *srcdest_srcnode_table(struct route_node *rn);
#ifdef __cplusplus
}
#endif
#endif /* _ZEBRA_SRC_DEST_TABLE_H */
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