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)
153 #define RTPRI_FIREWALL 8 /* Firewall control information */
154 #define RTPRI_FLOW 16 /* Flow based forwarding rules */
155 #define RTPRI_KERN_CTL 32 /* Kernel control routes */
157 #define RTPRI_USER_MIN 256 /* Mimimum user priority */
158 #define RTPRI_USER_MAX 1024 /* Maximum user priority */
160 #define RTPRI_KERN_DFLT 4096 /* Kernel default routes */
162 #define MAX_FLOW_BACKTRACE 32
165 typedef void (*f_pnode)(struct fib6_node *fn, void *);
168 struct hlist_node tb6_hlist;
171 struct fib6_node tb6_root;
174 #define RT6_TABLE_UNSPEC RT_TABLE_UNSPEC
175 #define RT6_TABLE_MAIN RT_TABLE_MAIN
176 #define RT6_TABLE_DFLT RT6_TABLE_MAIN
177 #define RT6_TABLE_INFO RT6_TABLE_MAIN
178 #define RT6_TABLE_PREFIX RT6_TABLE_MAIN
180 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
181 #define FIB6_TABLE_MIN 1
182 #define FIB6_TABLE_MAX RT_TABLE_MAX
183 #define RT6_TABLE_LOCAL RT_TABLE_LOCAL
185 #define FIB6_TABLE_MIN RT_TABLE_MAIN
186 #define FIB6_TABLE_MAX FIB6_TABLE_MIN
187 #define RT6_TABLE_LOCAL RT6_TABLE_MAIN
190 typedef struct rt6_info *(*pol_lookup_t)(struct fib6_table *,
191 struct flowi *, int);
197 extern struct fib6_table * fib6_get_table(u32 id);
198 extern struct fib6_table * fib6_new_table(u32 id);
199 extern struct dst_entry * fib6_rule_lookup(struct flowi *fl, int flags,
200 pol_lookup_t lookup);
202 extern struct fib6_node *fib6_lookup(struct fib6_node *root,
203 struct in6_addr *daddr,
204 struct in6_addr *saddr);
206 struct fib6_node *fib6_locate(struct fib6_node *root,
207 struct in6_addr *daddr, int dst_len,
208 struct in6_addr *saddr, int src_len);
210 extern void fib6_clean_all(int (*func)(struct rt6_info *, void *arg),
211 int prune, void *arg);
213 extern int fib6_add(struct fib6_node *root,
215 struct nl_info *info);
217 extern int fib6_del(struct rt6_info *rt,
218 struct nl_info *info);
220 extern void inet6_rt_notify(int event, struct rt6_info *rt,
221 struct nl_info *info);
223 extern void fib6_run_gc(unsigned long dummy);
225 extern void fib6_gc_cleanup(void);
227 extern int fib6_init(void);
229 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
230 extern int fib6_rules_init(void);
231 extern void fib6_rules_cleanup(void);
233 static inline int fib6_rules_init(void)
237 static inline void fib6_rules_cleanup(void)