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>
37 struct in6_addr fc_dst
;
38 struct in6_addr fc_src
;
39 struct in6_addr fc_gateway
;
41 unsigned long fc_expires
;
45 struct nl_info fc_nlinfo
;
50 struct fib6_node
*parent
;
51 struct fib6_node
*left
;
52 struct fib6_node
*right
;
53 #ifdef CONFIG_IPV6_SUBTREES
54 struct fib6_node
*subtree
;
56 struct rt6_info
*leaf
;
58 __u16 fn_bit
; /* bit key */
63 #ifndef CONFIG_IPV6_SUBTREES
64 #define FIB6_SUBTREE(fn) NULL
66 #define FIB6_SUBTREE(fn) ((fn)->subtree)
88 struct inet6_dev
*rt6i_idev
;
90 #define rt6i_dev u.dst.dev
91 #define rt6i_nexthop u.dst.neighbour
92 #define rt6i_expires u.dst.expires
94 struct fib6_node
*rt6i_node
;
96 struct in6_addr rt6i_gateway
;
101 struct fib6_table
*rt6i_table
;
103 struct rt6key rt6i_dst
;
104 struct rt6key rt6i_src
;
109 static inline struct inet6_dev
*ip6_dst_idev(struct dst_entry
*dst
)
111 return ((struct rt6_info
*)dst
)->rt6i_idev
;
116 struct fib6_walker_t
*prev
, *next
;
117 struct fib6_node
*root
, *node
;
118 struct rt6_info
*leaf
;
121 int (*func
)(struct fib6_walker_t
*);
125 struct rt6_statistics
{
127 __u32 fib_route_nodes
;
128 __u32 fib_rt_alloc
; /* permanent routes */
129 __u32 fib_rt_entries
; /* rt entries in table */
130 __u32 fib_rt_cache
; /* cache routes */
131 __u32 fib_discarded_routes
;
134 #define RTN_TL_ROOT 0x0001
135 #define RTN_ROOT 0x0002 /* tree root node */
136 #define RTN_RTINFO 0x0004 /* node with valid routing info */
139 * priority levels (or metrics)
143 #define RTPRI_FIREWALL 8 /* Firewall control information */
144 #define RTPRI_FLOW 16 /* Flow based forwarding rules */
145 #define RTPRI_KERN_CTL 32 /* Kernel control routes */
147 #define RTPRI_USER_MIN 256 /* Mimimum user priority */
148 #define RTPRI_USER_MAX 1024 /* Maximum user priority */
150 #define RTPRI_KERN_DFLT 4096 /* Kernel default routes */
152 #define MAX_FLOW_BACKTRACE 32
155 typedef void (*f_pnode
)(struct fib6_node
*fn
, void *);
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 fib6_table
*,
181 struct flowi
*, int);
187 extern struct fib6_table
* fib6_get_table(u32 id
);
188 extern struct fib6_table
* fib6_new_table(u32 id
);
189 extern struct dst_entry
* fib6_rule_lookup(struct flowi
*fl
, int flags
,
190 pol_lookup_t lookup
);
192 extern struct fib6_node
*fib6_lookup(struct fib6_node
*root
,
193 struct in6_addr
*daddr
,
194 struct in6_addr
*saddr
);
196 struct fib6_node
*fib6_locate(struct fib6_node
*root
,
197 struct in6_addr
*daddr
, int dst_len
,
198 struct in6_addr
*saddr
, int src_len
);
200 extern void fib6_clean_all(int (*func
)(struct rt6_info
*, void *arg
),
201 int prune
, void *arg
);
203 extern int fib6_add(struct fib6_node
*root
,
205 struct nl_info
*info
);
207 extern int fib6_del(struct rt6_info
*rt
,
208 struct nl_info
*info
);
210 extern void inet6_rt_notify(int event
, struct rt6_info
*rt
,
211 struct nl_info
*info
);
213 extern void fib6_run_gc(unsigned long dummy
);
215 extern void fib6_gc_cleanup(void);
217 extern void fib6_init(void);
219 extern void fib6_rules_init(void);
220 extern void fib6_rules_cleanup(void);
221 extern int fib6_rules_dump(struct sk_buff
*,
222 struct netlink_callback
*);