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 */
61 struct rt6_info *rr_ptr;
64 #ifndef CONFIG_IPV6_SUBTREES
65 #define FIB6_SUBTREE(fn) NULL
67 #define FIB6_SUBTREE(fn) ((fn)->subtree)
89 struct inet6_dev *rt6i_idev;
91 #define rt6i_dev u.dst.dev
92 #define rt6i_nexthop u.dst.neighbour
93 #define rt6i_expires u.dst.expires
95 struct fib6_node *rt6i_node;
97 struct in6_addr rt6i_gateway;
103 /* more non-fragment space at head required */
104 unsigned short rt6i_nfheader_len;
108 struct fib6_table *rt6i_table;
110 struct rt6key rt6i_dst;
113 u32 rt6i_flow_cache_genid;
116 struct rt6key rt6i_src;
119 static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst)
121 return ((struct rt6_info *)dst)->rt6i_idev;
126 struct fib6_walker_t *prev, *next;
127 struct fib6_node *root, *node;
128 struct rt6_info *leaf;
131 int (*func)(struct fib6_walker_t *);
135 struct rt6_statistics {
137 __u32 fib_route_nodes;
138 __u32 fib_rt_alloc; /* permanent routes */
139 __u32 fib_rt_entries; /* rt entries in table */
140 __u32 fib_rt_cache; /* cache routes */
141 __u32 fib_discarded_routes;
144 #define RTN_TL_ROOT 0x0001
145 #define RTN_ROOT 0x0002 /* tree root node */
146 #define RTN_RTINFO 0x0004 /* node with valid routing info */
149 * priority levels (or metrics)
155 struct hlist_node tb6_hlist;
158 struct fib6_node tb6_root;
161 #define RT6_TABLE_UNSPEC RT_TABLE_UNSPEC
162 #define RT6_TABLE_MAIN RT_TABLE_MAIN
163 #define RT6_TABLE_DFLT RT6_TABLE_MAIN
164 #define RT6_TABLE_INFO RT6_TABLE_MAIN
165 #define RT6_TABLE_PREFIX RT6_TABLE_MAIN
167 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
168 #define FIB6_TABLE_MIN 1
169 #define FIB6_TABLE_MAX RT_TABLE_MAX
170 #define RT6_TABLE_LOCAL RT_TABLE_LOCAL
172 #define FIB6_TABLE_MIN RT_TABLE_MAIN
173 #define FIB6_TABLE_MAX FIB6_TABLE_MIN
174 #define RT6_TABLE_LOCAL RT6_TABLE_MAIN
177 typedef struct rt6_info *(*pol_lookup_t)(struct net *,
179 struct flowi *, int);
185 extern struct fib6_table *fib6_get_table(struct net *net, u32 id);
186 extern struct fib6_table *fib6_new_table(struct net *net, u32 id);
187 extern struct dst_entry *fib6_rule_lookup(struct net *net,
188 struct flowi *fl, int flags,
189 pol_lookup_t lookup);
191 extern struct fib6_node *fib6_lookup(struct fib6_node *root,
192 struct in6_addr *daddr,
193 struct in6_addr *saddr);
195 struct fib6_node *fib6_locate(struct fib6_node *root,
196 struct in6_addr *daddr, int dst_len,
197 struct in6_addr *saddr, int src_len);
199 extern void fib6_clean_all(struct net *net,
200 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 expires,
216 extern void fib6_gc_cleanup(void);
218 extern int fib6_init(void);
220 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
221 extern int fib6_rules_init(void);
222 extern void fib6_rules_cleanup(void);
224 static inline int fib6_rules_init(void)
228 static inline void fib6_rules_cleanup(void)