Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Linux INET6 implementation | |
3 | * | |
4 | * Authors: | |
5 | * Pedro Roque <roque@di.fc.ul.pt> | |
6 | * | |
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. | |
11 | */ | |
12 | ||
13 | #ifndef _IP6_FIB_H | |
14 | #define _IP6_FIB_H | |
15 | ||
16 | #ifdef __KERNEL__ | |
17 | ||
18 | #include <linux/ipv6_route.h> | |
1da177e4 LT |
19 | #include <linux/rtnetlink.h> |
20 | #include <linux/spinlock.h> | |
86872cb5 TG |
21 | #include <net/dst.h> |
22 | #include <net/flow.h> | |
23 | #include <net/netlink.h> | |
1da177e4 LT |
24 | |
25 | struct rt6_info; | |
26 | ||
86872cb5 TG |
27 | struct fib6_config |
28 | { | |
29 | u32 fc_table; | |
30 | u32 fc_metric; | |
31 | int fc_dst_len; | |
32 | int fc_src_len; | |
33 | int fc_ifindex; | |
34 | u32 fc_flags; | |
35 | u32 fc_protocol; | |
36 | ||
37 | struct in6_addr fc_dst; | |
38 | struct in6_addr fc_src; | |
39 | struct in6_addr fc_gateway; | |
40 | ||
41 | unsigned long fc_expires; | |
42 | struct nlattr *fc_mx; | |
43 | int fc_mx_len; | |
44 | ||
45 | struct nl_info fc_nlinfo; | |
46 | }; | |
47 | ||
1da177e4 LT |
48 | struct fib6_node |
49 | { | |
50 | struct fib6_node *parent; | |
51 | struct fib6_node *left; | |
52 | struct fib6_node *right; | |
53 | ||
54 | struct fib6_node *subtree; | |
55 | ||
56 | struct rt6_info *leaf; | |
57 | ||
58 | __u16 fn_bit; /* bit key */ | |
59 | __u16 fn_flags; | |
60 | __u32 fn_sernum; | |
61 | }; | |
62 | ||
63 | ||
64 | /* | |
65 | * routing information | |
66 | * | |
67 | */ | |
68 | ||
69 | struct rt6key | |
70 | { | |
71 | struct in6_addr addr; | |
72 | int plen; | |
73 | }; | |
74 | ||
c71099ac TG |
75 | struct fib6_table; |
76 | ||
1da177e4 LT |
77 | struct rt6_info |
78 | { | |
79 | union { | |
80 | struct dst_entry dst; | |
81 | struct rt6_info *next; | |
82 | } u; | |
83 | ||
84 | struct inet6_dev *rt6i_idev; | |
85 | ||
86 | #define rt6i_dev u.dst.dev | |
87 | #define rt6i_nexthop u.dst.neighbour | |
88 | #define rt6i_expires u.dst.expires | |
89 | ||
90 | struct fib6_node *rt6i_node; | |
91 | ||
92 | struct in6_addr rt6i_gateway; | |
93 | ||
94 | u32 rt6i_flags; | |
95 | u32 rt6i_metric; | |
96 | atomic_t rt6i_ref; | |
c71099ac | 97 | struct fib6_table *rt6i_table; |
1da177e4 LT |
98 | |
99 | struct rt6key rt6i_dst; | |
100 | struct rt6key rt6i_src; | |
101 | ||
102 | u8 rt6i_protocol; | |
103 | }; | |
104 | ||
105 | struct fib6_walker_t | |
106 | { | |
107 | struct fib6_walker_t *prev, *next; | |
108 | struct fib6_node *root, *node; | |
109 | struct rt6_info *leaf; | |
110 | unsigned char state; | |
111 | unsigned char prune; | |
112 | int (*func)(struct fib6_walker_t *); | |
113 | void *args; | |
114 | }; | |
115 | ||
1da177e4 LT |
116 | struct rt6_statistics { |
117 | __u32 fib_nodes; | |
118 | __u32 fib_route_nodes; | |
119 | __u32 fib_rt_alloc; /* permanent routes */ | |
120 | __u32 fib_rt_entries; /* rt entries in table */ | |
121 | __u32 fib_rt_cache; /* cache routes */ | |
122 | __u32 fib_discarded_routes; | |
123 | }; | |
124 | ||
125 | #define RTN_TL_ROOT 0x0001 | |
126 | #define RTN_ROOT 0x0002 /* tree root node */ | |
127 | #define RTN_RTINFO 0x0004 /* node with valid routing info */ | |
128 | ||
129 | /* | |
130 | * priority levels (or metrics) | |
131 | * | |
132 | */ | |
133 | ||
134 | #define RTPRI_FIREWALL 8 /* Firewall control information */ | |
135 | #define RTPRI_FLOW 16 /* Flow based forwarding rules */ | |
136 | #define RTPRI_KERN_CTL 32 /* Kernel control routes */ | |
137 | ||
138 | #define RTPRI_USER_MIN 256 /* Mimimum user priority */ | |
139 | #define RTPRI_USER_MAX 1024 /* Maximum user priority */ | |
140 | ||
141 | #define RTPRI_KERN_DFLT 4096 /* Kernel default routes */ | |
142 | ||
143 | #define MAX_FLOW_BACKTRACE 32 | |
144 | ||
145 | ||
146 | typedef void (*f_pnode)(struct fib6_node *fn, void *); | |
147 | ||
c71099ac TG |
148 | struct fib6_table { |
149 | struct hlist_node tb6_hlist; | |
150 | u32 tb6_id; | |
151 | rwlock_t tb6_lock; | |
152 | struct fib6_node tb6_root; | |
153 | }; | |
154 | ||
155 | #define RT6_TABLE_UNSPEC RT_TABLE_UNSPEC | |
156 | #define RT6_TABLE_MAIN RT_TABLE_MAIN | |
c71099ac TG |
157 | #define RT6_TABLE_DFLT RT6_TABLE_MAIN |
158 | #define RT6_TABLE_INFO RT6_TABLE_MAIN | |
159 | #define RT6_TABLE_PREFIX RT6_TABLE_MAIN | |
160 | ||
161 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES | |
162 | #define FIB6_TABLE_MIN 1 | |
163 | #define FIB6_TABLE_MAX RT_TABLE_MAX | |
101367c2 | 164 | #define RT6_TABLE_LOCAL RT_TABLE_LOCAL |
c71099ac TG |
165 | #else |
166 | #define FIB6_TABLE_MIN RT_TABLE_MAIN | |
167 | #define FIB6_TABLE_MAX FIB6_TABLE_MIN | |
101367c2 | 168 | #define RT6_TABLE_LOCAL RT6_TABLE_MAIN |
c71099ac TG |
169 | #endif |
170 | ||
171 | #define RT6_F_STRICT 1 | |
172 | #define RT6_F_HAS_SADDR 2 | |
173 | ||
174 | typedef struct rt6_info *(*pol_lookup_t)(struct fib6_table *, | |
175 | struct flowi *, int); | |
1da177e4 LT |
176 | |
177 | /* | |
178 | * exported functions | |
179 | */ | |
180 | ||
c71099ac TG |
181 | extern struct fib6_table * fib6_get_table(u32 id); |
182 | extern struct fib6_table * fib6_new_table(u32 id); | |
183 | extern struct dst_entry * fib6_rule_lookup(struct flowi *fl, int flags, | |
184 | pol_lookup_t lookup); | |
185 | ||
1da177e4 LT |
186 | extern struct fib6_node *fib6_lookup(struct fib6_node *root, |
187 | struct in6_addr *daddr, | |
188 | struct in6_addr *saddr); | |
189 | ||
190 | struct fib6_node *fib6_locate(struct fib6_node *root, | |
191 | struct in6_addr *daddr, int dst_len, | |
192 | struct in6_addr *saddr, int src_len); | |
193 | ||
c71099ac TG |
194 | extern void fib6_clean_all(int (*func)(struct rt6_info *, void *arg), |
195 | int prune, void *arg); | |
196 | ||
1da177e4 LT |
197 | extern int fib6_add(struct fib6_node *root, |
198 | struct rt6_info *rt, | |
86872cb5 | 199 | struct nl_info *info); |
1da177e4 LT |
200 | |
201 | extern int fib6_del(struct rt6_info *rt, | |
86872cb5 | 202 | struct nl_info *info); |
1da177e4 LT |
203 | |
204 | extern void inet6_rt_notify(int event, struct rt6_info *rt, | |
86872cb5 | 205 | struct nl_info *info); |
1da177e4 LT |
206 | |
207 | extern void fib6_run_gc(unsigned long dummy); | |
208 | ||
209 | extern void fib6_gc_cleanup(void); | |
210 | ||
211 | extern void fib6_init(void); | |
101367c2 TG |
212 | |
213 | extern void fib6_rules_init(void); | |
214 | extern void fib6_rules_cleanup(void); | |
215 | extern int fib6_rules_dump(struct sk_buff *, | |
216 | struct netlink_callback *); | |
217 | ||
1da177e4 LT |
218 | #endif |
219 | #endif |