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 *);