2 * Linux INET6 implementation
5 * Pedro Roque <roque@di.fc.ul.pt>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
18 #include <linux/ipv6_route.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/spinlock.h>
23 #include <net/netlink.h>
25 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
26 #define FIB6_TABLE_HASHSZ 256
28 #define FIB6_TABLE_HASHSZ 1
42 struct in6_addr fc_dst
;
43 struct in6_addr fc_src
;
44 struct in6_addr fc_gateway
;
46 unsigned long fc_expires
;
50 struct nl_info fc_nlinfo
;
54 struct fib6_node
*parent
;
55 struct fib6_node
*left
;
56 struct fib6_node
*right
;
57 #ifdef CONFIG_IPV6_SUBTREES
58 struct fib6_node
*subtree
;
60 struct rt6_info
*leaf
;
62 __u16 fn_bit
; /* bit key */
65 struct rt6_info
*rr_ptr
;
68 #ifndef CONFIG_IPV6_SUBTREES
69 #define FIB6_SUBTREE(fn) NULL
71 #define FIB6_SUBTREE(fn) ((fn)->subtree)
91 struct inet6_dev
*rt6i_idev
;
93 #define rt6i_dev u.dst.dev
94 #define rt6i_nexthop u.dst.neighbour
95 #define rt6i_expires u.dst.expires
97 struct fib6_node
*rt6i_node
;
99 struct in6_addr rt6i_gateway
;
105 /* more non-fragment space at head required */
106 unsigned short rt6i_nfheader_len
;
110 struct fib6_table
*rt6i_table
;
112 struct rt6key rt6i_dst
;
115 u32 rt6i_flow_cache_genid
;
118 struct rt6key rt6i_src
;
121 static inline struct inet6_dev
*ip6_dst_idev(struct dst_entry
*dst
)
123 return ((struct rt6_info
*)dst
)->rt6i_idev
;
126 struct fib6_walker_t
{
128 struct fib6_node
*root
, *node
;
129 struct rt6_info
*leaf
;
134 int (*func
)(struct fib6_walker_t
*);
138 struct rt6_statistics
{
140 __u32 fib_route_nodes
;
141 __u32 fib_rt_alloc
; /* permanent routes */
142 __u32 fib_rt_entries
; /* rt entries in table */
143 __u32 fib_rt_cache
; /* cache routes */
144 __u32 fib_discarded_routes
;
147 #define RTN_TL_ROOT 0x0001
148 #define RTN_ROOT 0x0002 /* tree root node */
149 #define RTN_RTINFO 0x0004 /* node with valid routing info */
152 * priority levels (or metrics)
158 struct hlist_node tb6_hlist
;
161 struct fib6_node tb6_root
;
164 #define RT6_TABLE_UNSPEC RT_TABLE_UNSPEC
165 #define RT6_TABLE_MAIN RT_TABLE_MAIN
166 #define RT6_TABLE_DFLT RT6_TABLE_MAIN
167 #define RT6_TABLE_INFO RT6_TABLE_MAIN
168 #define RT6_TABLE_PREFIX RT6_TABLE_MAIN
170 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
171 #define FIB6_TABLE_MIN 1
172 #define FIB6_TABLE_MAX RT_TABLE_MAX
173 #define RT6_TABLE_LOCAL RT_TABLE_LOCAL
175 #define FIB6_TABLE_MIN RT_TABLE_MAIN
176 #define FIB6_TABLE_MAX FIB6_TABLE_MIN
177 #define RT6_TABLE_LOCAL RT6_TABLE_MAIN
180 typedef struct rt6_info
*(*pol_lookup_t
)(struct net
*,
182 struct flowi
*, int);
188 extern struct fib6_table
*fib6_get_table(struct net
*net
, u32 id
);
189 extern struct fib6_table
*fib6_new_table(struct net
*net
, u32 id
);
190 extern struct dst_entry
*fib6_rule_lookup(struct net
*net
,
191 struct flowi
*fl
, int flags
,
192 pol_lookup_t lookup
);
194 extern struct fib6_node
*fib6_lookup(struct fib6_node
*root
,
195 struct in6_addr
*daddr
,
196 struct in6_addr
*saddr
);
198 struct fib6_node
*fib6_locate(struct fib6_node
*root
,
199 struct in6_addr
*daddr
, int dst_len
,
200 struct in6_addr
*saddr
, int src_len
);
202 extern void fib6_clean_all(struct net
*net
,
203 int (*func
)(struct rt6_info
*, void *arg
),
204 int prune
, void *arg
);
206 extern int fib6_add(struct fib6_node
*root
,
208 struct nl_info
*info
);
210 extern int fib6_del(struct rt6_info
*rt
,
211 struct nl_info
*info
);
213 extern void inet6_rt_notify(int event
, struct rt6_info
*rt
,
214 struct nl_info
*info
);
216 extern void fib6_run_gc(unsigned long expires
,
219 extern void fib6_gc_cleanup(void);
221 extern int fib6_init(void);
223 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
224 extern int fib6_rules_init(void);
225 extern void fib6_rules_cleanup(void);
227 static inline int fib6_rules_init(void)
231 static inline void fib6_rules_cleanup(void)