1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/*
* SRC-DEST Routing Table
*
* Copyright (C) 2017 by David Lamparter & Christian Franke,
* Open Source Routing / NetDEF Inc.
*
* This file is part of FreeRangeRouting (FRR)
*
* FRR is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* FRR is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with FRR; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#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"
#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 prefixptr dst_pu,
struct prefix_ipv6 *src_p);
extern struct route_node *srcdest_rnode_lookup(struct route_table *table,
union prefixptr dst_pu,
struct prefix_ipv6 *src_p);
extern void srcdest_rnode_prefixes (struct route_node *rn, struct prefix **p,
struct prefix **src_p);
extern const char *srcdest_rnode2str(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 (struct route_node *rn)
{
return rn->table->delegate == &_srcdest_dstnode_delegate;
}
static inline int
rnode_is_srcnode (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 = rn->table->info;
return dst_rn->table;
}
else
{
return rn->table;
}
}
static inline void *
srcdest_rnode_table_info (struct route_node *rn)
{
return srcdest_rnode_table(rn)->info;
}
#endif /* _ZEBRA_SRC_DEST_TABLE_H */
|
