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> | |
19 | ||
20 | #include <net/dst.h> | |
21 | #include <net/flow.h> | |
22 | #include <linux/rtnetlink.h> | |
23 | #include <linux/spinlock.h> | |
24 | ||
25 | struct rt6_info; | |
26 | ||
27 | struct fib6_node | |
28 | { | |
29 | struct fib6_node *parent; | |
30 | struct fib6_node *left; | |
31 | struct fib6_node *right; | |
32 | ||
33 | struct fib6_node *subtree; | |
34 | ||
35 | struct rt6_info *leaf; | |
36 | ||
37 | __u16 fn_bit; /* bit key */ | |
38 | __u16 fn_flags; | |
39 | __u32 fn_sernum; | |
40 | }; | |
41 | ||
42 | ||
43 | /* | |
44 | * routing information | |
45 | * | |
46 | */ | |
47 | ||
48 | struct rt6key | |
49 | { | |
50 | struct in6_addr addr; | |
51 | int plen; | |
52 | }; | |
53 | ||
54 | struct rt6_info | |
55 | { | |
56 | union { | |
57 | struct dst_entry dst; | |
58 | struct rt6_info *next; | |
59 | } u; | |
60 | ||
61 | struct inet6_dev *rt6i_idev; | |
62 | ||
63 | #define rt6i_dev u.dst.dev | |
64 | #define rt6i_nexthop u.dst.neighbour | |
65 | #define rt6i_expires u.dst.expires | |
66 | ||
67 | struct fib6_node *rt6i_node; | |
68 | ||
69 | struct in6_addr rt6i_gateway; | |
70 | ||
71 | u32 rt6i_flags; | |
72 | u32 rt6i_metric; | |
73 | atomic_t rt6i_ref; | |
74 | ||
75 | struct rt6key rt6i_dst; | |
76 | struct rt6key rt6i_src; | |
77 | ||
78 | u8 rt6i_protocol; | |
79 | }; | |
80 | ||
81 | struct fib6_walker_t | |
82 | { | |
83 | struct fib6_walker_t *prev, *next; | |
84 | struct fib6_node *root, *node; | |
85 | struct rt6_info *leaf; | |
86 | unsigned char state; | |
87 | unsigned char prune; | |
88 | int (*func)(struct fib6_walker_t *); | |
89 | void *args; | |
90 | }; | |
91 | ||
92 | extern struct fib6_walker_t fib6_walker_list; | |
93 | extern rwlock_t fib6_walker_lock; | |
94 | ||
95 | static inline void fib6_walker_link(struct fib6_walker_t *w) | |
96 | { | |
97 | write_lock_bh(&fib6_walker_lock); | |
98 | w->next = fib6_walker_list.next; | |
99 | w->prev = &fib6_walker_list; | |
100 | w->next->prev = w; | |
101 | w->prev->next = w; | |
102 | write_unlock_bh(&fib6_walker_lock); | |
103 | } | |
104 | ||
105 | static inline void fib6_walker_unlink(struct fib6_walker_t *w) | |
106 | { | |
107 | write_lock_bh(&fib6_walker_lock); | |
108 | w->next->prev = w->prev; | |
109 | w->prev->next = w->next; | |
110 | w->prev = w->next = w; | |
111 | write_unlock_bh(&fib6_walker_lock); | |
112 | } | |
113 | ||
114 | struct rt6_statistics { | |
115 | __u32 fib_nodes; | |
116 | __u32 fib_route_nodes; | |
117 | __u32 fib_rt_alloc; /* permanent routes */ | |
118 | __u32 fib_rt_entries; /* rt entries in table */ | |
119 | __u32 fib_rt_cache; /* cache routes */ | |
120 | __u32 fib_discarded_routes; | |
121 | }; | |
122 | ||
123 | #define RTN_TL_ROOT 0x0001 | |
124 | #define RTN_ROOT 0x0002 /* tree root node */ | |
125 | #define RTN_RTINFO 0x0004 /* node with valid routing info */ | |
126 | ||
127 | /* | |
128 | * priority levels (or metrics) | |
129 | * | |
130 | */ | |
131 | ||
132 | #define RTPRI_FIREWALL 8 /* Firewall control information */ | |
133 | #define RTPRI_FLOW 16 /* Flow based forwarding rules */ | |
134 | #define RTPRI_KERN_CTL 32 /* Kernel control routes */ | |
135 | ||
136 | #define RTPRI_USER_MIN 256 /* Mimimum user priority */ | |
137 | #define RTPRI_USER_MAX 1024 /* Maximum user priority */ | |
138 | ||
139 | #define RTPRI_KERN_DFLT 4096 /* Kernel default routes */ | |
140 | ||
141 | #define MAX_FLOW_BACKTRACE 32 | |
142 | ||
143 | ||
144 | typedef void (*f_pnode)(struct fib6_node *fn, void *); | |
145 | ||
146 | extern struct fib6_node ip6_routing_table; | |
147 | ||
148 | /* | |
149 | * exported functions | |
150 | */ | |
151 | ||
152 | extern struct fib6_node *fib6_lookup(struct fib6_node *root, | |
153 | struct in6_addr *daddr, | |
154 | struct in6_addr *saddr); | |
155 | ||
156 | struct fib6_node *fib6_locate(struct fib6_node *root, | |
157 | struct in6_addr *daddr, int dst_len, | |
158 | struct in6_addr *saddr, int src_len); | |
159 | ||
160 | extern void fib6_clean_tree(struct fib6_node *root, | |
161 | int (*func)(struct rt6_info *, void *arg), | |
162 | int prune, void *arg); | |
163 | ||
164 | extern int fib6_walk(struct fib6_walker_t *w); | |
165 | extern int fib6_walk_continue(struct fib6_walker_t *w); | |
166 | ||
167 | extern int fib6_add(struct fib6_node *root, | |
168 | struct rt6_info *rt, | |
169 | struct nlmsghdr *nlh, | |
170 | void *rtattr); | |
171 | ||
172 | extern int fib6_del(struct rt6_info *rt, | |
173 | struct nlmsghdr *nlh, | |
174 | void *rtattr); | |
175 | ||
176 | extern void inet6_rt_notify(int event, struct rt6_info *rt, | |
177 | struct nlmsghdr *nlh); | |
178 | ||
179 | extern void fib6_run_gc(unsigned long dummy); | |
180 | ||
181 | extern void fib6_gc_cleanup(void); | |
182 | ||
183 | extern void fib6_init(void); | |
184 | #endif | |
185 | #endif |