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>
22 #include <linux/rtnetlink.h>
23 #include <linux/spinlock.h>
29 struct fib6_node
*parent
;
30 struct fib6_node
*left
;
31 struct fib6_node
*right
;
33 struct fib6_node
*subtree
;
35 struct rt6_info
*leaf
;
37 __u16 fn_bit
; /* bit key */
60 struct rt6_info
*next
;
63 struct inet6_dev
*rt6i_idev
;
65 #define rt6i_dev u.dst.dev
66 #define rt6i_nexthop u.dst.neighbour
67 #define rt6i_expires u.dst.expires
69 struct fib6_node
*rt6i_node
;
71 struct in6_addr rt6i_gateway
;
76 struct fib6_table
*rt6i_table
;
78 struct rt6key rt6i_dst
;
79 struct rt6key rt6i_src
;
86 struct fib6_walker_t
*prev
, *next
;
87 struct fib6_node
*root
, *node
;
88 struct rt6_info
*leaf
;
91 int (*func
)(struct fib6_walker_t
*);
95 extern struct fib6_walker_t fib6_walker_list
;
96 extern rwlock_t fib6_walker_lock
;
98 static inline void fib6_walker_link(struct fib6_walker_t
*w
)
100 write_lock_bh(&fib6_walker_lock
);
101 w
->next
= fib6_walker_list
.next
;
102 w
->prev
= &fib6_walker_list
;
105 write_unlock_bh(&fib6_walker_lock
);
108 static inline void fib6_walker_unlink(struct fib6_walker_t
*w
)
110 write_lock_bh(&fib6_walker_lock
);
111 w
->next
->prev
= w
->prev
;
112 w
->prev
->next
= w
->next
;
113 w
->prev
= w
->next
= w
;
114 write_unlock_bh(&fib6_walker_lock
);
117 struct rt6_statistics
{
119 __u32 fib_route_nodes
;
120 __u32 fib_rt_alloc
; /* permanent routes */
121 __u32 fib_rt_entries
; /* rt entries in table */
122 __u32 fib_rt_cache
; /* cache routes */
123 __u32 fib_discarded_routes
;
126 #define RTN_TL_ROOT 0x0001
127 #define RTN_ROOT 0x0002 /* tree root node */
128 #define RTN_RTINFO 0x0004 /* node with valid routing info */
131 * priority levels (or metrics)
135 #define RTPRI_FIREWALL 8 /* Firewall control information */
136 #define RTPRI_FLOW 16 /* Flow based forwarding rules */
137 #define RTPRI_KERN_CTL 32 /* Kernel control routes */
139 #define RTPRI_USER_MIN 256 /* Mimimum user priority */
140 #define RTPRI_USER_MAX 1024 /* Maximum user priority */
142 #define RTPRI_KERN_DFLT 4096 /* Kernel default routes */
144 #define MAX_FLOW_BACKTRACE 32
147 typedef void (*f_pnode
)(struct fib6_node
*fn
, void *);
150 struct hlist_node tb6_hlist
;
153 struct fib6_node tb6_root
;
156 #define RT6_TABLE_UNSPEC RT_TABLE_UNSPEC
157 #define RT6_TABLE_MAIN RT_TABLE_MAIN
158 #define RT6_TABLE_DFLT RT6_TABLE_MAIN
159 #define RT6_TABLE_INFO RT6_TABLE_MAIN
160 #define RT6_TABLE_PREFIX RT6_TABLE_MAIN
162 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
163 #define FIB6_TABLE_MIN 1
164 #define FIB6_TABLE_MAX RT_TABLE_MAX
165 #define RT6_TABLE_LOCAL RT_TABLE_LOCAL
167 #define FIB6_TABLE_MIN RT_TABLE_MAIN
168 #define FIB6_TABLE_MAX FIB6_TABLE_MIN
169 #define RT6_TABLE_LOCAL RT6_TABLE_MAIN
172 #define RT6_F_STRICT 1
173 #define RT6_F_HAS_SADDR 2
175 typedef struct rt6_info
*(*pol_lookup_t
)(struct fib6_table
*,
176 struct flowi
*, int);
182 extern struct fib6_table
* fib6_get_table(u32 id
);
183 extern struct fib6_table
* fib6_new_table(u32 id
);
184 extern struct dst_entry
* fib6_rule_lookup(struct flowi
*fl
, int flags
,
185 pol_lookup_t lookup
);
187 extern struct fib6_node
*fib6_lookup(struct fib6_node
*root
,
188 struct in6_addr
*daddr
,
189 struct in6_addr
*saddr
);
191 struct fib6_node
*fib6_locate(struct fib6_node
*root
,
192 struct in6_addr
*daddr
, int dst_len
,
193 struct in6_addr
*saddr
, int src_len
);
195 extern void fib6_clean_tree(struct fib6_node
*root
,
196 int (*func
)(struct rt6_info
*, void *arg
),
197 int prune
, void *arg
);
199 extern void fib6_clean_all(int (*func
)(struct rt6_info
*, void *arg
),
200 int prune
, void *arg
);
202 extern int fib6_walk(struct fib6_walker_t
*w
);
203 extern int fib6_walk_continue(struct fib6_walker_t
*w
);
205 extern int fib6_add(struct fib6_node
*root
,
207 struct nlmsghdr
*nlh
,
209 struct netlink_skb_parms
*req
);
211 extern int fib6_del(struct rt6_info
*rt
,
212 struct nlmsghdr
*nlh
,
214 struct netlink_skb_parms
*req
);
216 extern void inet6_rt_notify(int event
, struct rt6_info
*rt
,
217 struct nlmsghdr
*nlh
,
218 struct netlink_skb_parms
*req
);
220 extern void fib6_run_gc(unsigned long dummy
);
222 extern void fib6_gc_cleanup(void);
224 extern void fib6_init(void);
226 extern void fib6_rules_init(void);
227 extern void fib6_rules_cleanup(void);
228 extern int fib6_rules_dump(struct sk_buff
*,
229 struct netlink_callback
*);