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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; | |
8bce65b9 | 53 | #ifdef CONFIG_IPV6_SUBTREES |
1da177e4 | 54 | struct fib6_node *subtree; |
8bce65b9 | 55 | #endif |
1da177e4 LT |
56 | struct rt6_info *leaf; |
57 | ||
58 | __u16 fn_bit; /* bit key */ | |
59 | __u16 fn_flags; | |
60 | __u32 fn_sernum; | |
f11e6659 | 61 | struct rt6_info *rr_ptr; |
1da177e4 LT |
62 | }; |
63 | ||
7fc33165 YH |
64 | #ifndef CONFIG_IPV6_SUBTREES |
65 | #define FIB6_SUBTREE(fn) NULL | |
66 | #else | |
67 | #define FIB6_SUBTREE(fn) ((fn)->subtree) | |
68 | #endif | |
1da177e4 LT |
69 | |
70 | /* | |
71 | * routing information | |
72 | * | |
73 | */ | |
74 | ||
75 | struct rt6key | |
76 | { | |
77 | struct in6_addr addr; | |
78 | int plen; | |
79 | }; | |
80 | ||
c71099ac TG |
81 | struct fib6_table; |
82 | ||
1da177e4 LT |
83 | struct rt6_info |
84 | { | |
85 | union { | |
86 | struct dst_entry dst; | |
1da177e4 LT |
87 | } u; |
88 | ||
89 | struct inet6_dev *rt6i_idev; | |
90 | ||
91 | #define rt6i_dev u.dst.dev | |
92 | #define rt6i_nexthop u.dst.neighbour | |
93 | #define rt6i_expires u.dst.expires | |
94 | ||
95 | struct fib6_node *rt6i_node; | |
96 | ||
97 | struct in6_addr rt6i_gateway; | |
98 | ||
99 | u32 rt6i_flags; | |
100 | u32 rt6i_metric; | |
101 | atomic_t rt6i_ref; | |
c71099ac | 102 | struct fib6_table *rt6i_table; |
1da177e4 LT |
103 | |
104 | struct rt6key rt6i_dst; | |
105 | struct rt6key rt6i_src; | |
106 | ||
107 | u8 rt6i_protocol; | |
a47ed4cd NT |
108 | |
109 | #ifdef CONFIG_XFRM | |
110 | u32 rt6i_flow_cache_genid; | |
111 | #endif | |
1da177e4 LT |
112 | }; |
113 | ||
7a3025b1 YH |
114 | static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst) |
115 | { | |
116 | return ((struct rt6_info *)dst)->rt6i_idev; | |
117 | } | |
118 | ||
1da177e4 LT |
119 | struct fib6_walker_t |
120 | { | |
121 | struct fib6_walker_t *prev, *next; | |
122 | struct fib6_node *root, *node; | |
123 | struct rt6_info *leaf; | |
124 | unsigned char state; | |
125 | unsigned char prune; | |
126 | int (*func)(struct fib6_walker_t *); | |
127 | void *args; | |
128 | }; | |
129 | ||
1da177e4 LT |
130 | struct rt6_statistics { |
131 | __u32 fib_nodes; | |
132 | __u32 fib_route_nodes; | |
133 | __u32 fib_rt_alloc; /* permanent routes */ | |
134 | __u32 fib_rt_entries; /* rt entries in table */ | |
135 | __u32 fib_rt_cache; /* cache routes */ | |
136 | __u32 fib_discarded_routes; | |
137 | }; | |
138 | ||
139 | #define RTN_TL_ROOT 0x0001 | |
140 | #define RTN_ROOT 0x0002 /* tree root node */ | |
141 | #define RTN_RTINFO 0x0004 /* node with valid routing info */ | |
142 | ||
143 | /* | |
144 | * priority levels (or metrics) | |
145 | * | |
146 | */ | |
147 | ||
148 | #define RTPRI_FIREWALL 8 /* Firewall control information */ | |
149 | #define RTPRI_FLOW 16 /* Flow based forwarding rules */ | |
150 | #define RTPRI_KERN_CTL 32 /* Kernel control routes */ | |
151 | ||
152 | #define RTPRI_USER_MIN 256 /* Mimimum user priority */ | |
153 | #define RTPRI_USER_MAX 1024 /* Maximum user priority */ | |
154 | ||
155 | #define RTPRI_KERN_DFLT 4096 /* Kernel default routes */ | |
156 | ||
157 | #define MAX_FLOW_BACKTRACE 32 | |
158 | ||
159 | ||
160 | typedef void (*f_pnode)(struct fib6_node *fn, void *); | |
161 | ||
c71099ac TG |
162 | struct fib6_table { |
163 | struct hlist_node tb6_hlist; | |
164 | u32 tb6_id; | |
165 | rwlock_t tb6_lock; | |
166 | struct fib6_node tb6_root; | |
167 | }; | |
168 | ||
169 | #define RT6_TABLE_UNSPEC RT_TABLE_UNSPEC | |
170 | #define RT6_TABLE_MAIN RT_TABLE_MAIN | |
c71099ac TG |
171 | #define RT6_TABLE_DFLT RT6_TABLE_MAIN |
172 | #define RT6_TABLE_INFO RT6_TABLE_MAIN | |
173 | #define RT6_TABLE_PREFIX RT6_TABLE_MAIN | |
174 | ||
175 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES | |
176 | #define FIB6_TABLE_MIN 1 | |
177 | #define FIB6_TABLE_MAX RT_TABLE_MAX | |
101367c2 | 178 | #define RT6_TABLE_LOCAL RT_TABLE_LOCAL |
c71099ac TG |
179 | #else |
180 | #define FIB6_TABLE_MIN RT_TABLE_MAIN | |
181 | #define FIB6_TABLE_MAX FIB6_TABLE_MIN | |
101367c2 | 182 | #define RT6_TABLE_LOCAL RT6_TABLE_MAIN |
c71099ac TG |
183 | #endif |
184 | ||
c71099ac TG |
185 | typedef struct rt6_info *(*pol_lookup_t)(struct fib6_table *, |
186 | struct flowi *, int); | |
1da177e4 LT |
187 | |
188 | /* | |
189 | * exported functions | |
190 | */ | |
191 | ||
c71099ac TG |
192 | extern struct fib6_table * fib6_get_table(u32 id); |
193 | extern struct fib6_table * fib6_new_table(u32 id); | |
194 | extern struct dst_entry * fib6_rule_lookup(struct flowi *fl, int flags, | |
195 | pol_lookup_t lookup); | |
196 | ||
1da177e4 LT |
197 | extern struct fib6_node *fib6_lookup(struct fib6_node *root, |
198 | struct in6_addr *daddr, | |
199 | struct in6_addr *saddr); | |
200 | ||
201 | struct fib6_node *fib6_locate(struct fib6_node *root, | |
202 | struct in6_addr *daddr, int dst_len, | |
203 | struct in6_addr *saddr, int src_len); | |
204 | ||
c71099ac TG |
205 | extern void fib6_clean_all(int (*func)(struct rt6_info *, void *arg), |
206 | int prune, void *arg); | |
207 | ||
1da177e4 LT |
208 | extern int fib6_add(struct fib6_node *root, |
209 | struct rt6_info *rt, | |
86872cb5 | 210 | struct nl_info *info); |
1da177e4 LT |
211 | |
212 | extern int fib6_del(struct rt6_info *rt, | |
86872cb5 | 213 | struct nl_info *info); |
1da177e4 LT |
214 | |
215 | extern void inet6_rt_notify(int event, struct rt6_info *rt, | |
86872cb5 | 216 | struct nl_info *info); |
1da177e4 LT |
217 | |
218 | extern void fib6_run_gc(unsigned long dummy); | |
219 | ||
220 | extern void fib6_gc_cleanup(void); | |
221 | ||
222 | extern void fib6_init(void); | |
101367c2 TG |
223 | |
224 | extern void fib6_rules_init(void); | |
225 | extern void fib6_rules_cleanup(void); | |
101367c2 | 226 | |
1da177e4 LT |
227 | #endif |
228 | #endif |