ip6_fib.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:4k
- /*
- * Linux INET6 implementation
- *
- * Authors:
- * Pedro Roque <roque@di.fc.ul.pt>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #ifndef _IP6_FIB_H
- #define _IP6_FIB_H
- #ifdef __KERNEL__
- #include <linux/ipv6_route.h>
- #include <net/dst.h>
- #include <net/flow.h>
- #include <linux/rtnetlink.h>
- struct rt6_info;
- struct fib6_node
- {
- struct fib6_node *parent;
- struct fib6_node *left;
- struct fib6_node *right;
- struct fib6_node *subtree;
- struct rt6_info *leaf;
- __u16 fn_bit; /* bit key */
- __u16 fn_flags;
- __u32 fn_sernum;
- };
- /*
- * routing information
- *
- */
- struct rt6key
- {
- struct in6_addr addr;
- int plen;
- };
- struct rt6_info
- {
- union {
- struct dst_entry dst;
- struct rt6_info *next;
- } u;
- #define rt6i_dev u.dst.dev
- #define rt6i_nexthop u.dst.neighbour
- #define rt6i_expires u.dst.expires
- struct fib6_node *rt6i_node;
- struct in6_addr rt6i_gateway;
-
- u32 rt6i_flags;
- u32 rt6i_metric;
- u8 rt6i_hoplimit;
- atomic_t rt6i_ref;
- union {
- struct flow_rule *rt6iu_flowr;
- struct flow_filter *rt6iu_filter;
- } flow_u;
- #define rt6i_flowr flow_u.rt6iu_flowr
- #define rt6i_filter flow_u.rt6iu_filter
- struct rt6key rt6i_dst;
- struct rt6key rt6i_src;
- };
- struct fib6_walker_t
- {
- struct fib6_walker_t *prev, *next;
- struct fib6_node *root, *node;
- struct rt6_info *leaf;
- unsigned char state;
- unsigned char prune;
- int (*func)(struct fib6_walker_t *);
- void *args;
- };
- extern struct fib6_walker_t fib6_walker_list;
- extern rwlock_t fib6_walker_lock;
- static inline void fib6_walker_link(struct fib6_walker_t *w)
- {
- write_lock_bh(&fib6_walker_lock);
- w->next = fib6_walker_list.next;
- w->prev = &fib6_walker_list;
- w->next->prev = w;
- w->prev->next = w;
- write_unlock_bh(&fib6_walker_lock);
- }
- static inline void fib6_walker_unlink(struct fib6_walker_t *w)
- {
- write_lock_bh(&fib6_walker_lock);
- w->next->prev = w->prev;
- w->prev->next = w->next;
- w->prev = w->next = w;
- write_unlock_bh(&fib6_walker_lock);
- }
- struct rt6_statistics {
- __u32 fib_nodes;
- __u32 fib_route_nodes;
- __u32 fib_rt_alloc; /* permanet routes */
- __u32 fib_rt_entries; /* rt entries in table */
- __u32 fib_rt_cache; /* cache routes */
- };
- #define RTN_TL_ROOT 0x0001
- #define RTN_ROOT 0x0002 /* tree root node */
- #define RTN_RTINFO 0x0004 /* node with valid routing info */
- /*
- * priority levels (or metrics)
- *
- */
- #define RTPRI_FIREWALL 8 /* Firewall control information */
- #define RTPRI_FLOW 16 /* Flow based forwarding rules */
- #define RTPRI_KERN_CTL 32 /* Kernel control routes */
- #define RTPRI_USER_MIN 256 /* Mimimum user priority */
- #define RTPRI_USER_MAX 1024 /* Maximum user priority */
- #define RTPRI_KERN_DFLT 4096 /* Kernel default routes */
- #define MAX_FLOW_BACKTRACE 32
- typedef void (*f_pnode)(struct fib6_node *fn, void *);
- extern struct fib6_node ip6_routing_table;
- /*
- * exported functions
- */
- extern struct fib6_node *fib6_lookup(struct fib6_node *root,
- struct in6_addr *daddr,
- struct in6_addr *saddr);
- struct fib6_node *fib6_locate(struct fib6_node *root,
- struct in6_addr *daddr, int dst_len,
- struct in6_addr *saddr, int src_len);
- extern void fib6_clean_tree(struct fib6_node *root,
- int (*func)(struct rt6_info *, void *arg),
- int prune, void *arg);
- extern int fib6_walk(struct fib6_walker_t *w);
- extern int fib6_walk_continue(struct fib6_walker_t *w);
- extern int fib6_add(struct fib6_node *root,
- struct rt6_info *rt);
- extern int fib6_del(struct rt6_info *rt);
- extern void inet6_rt_notify(int event, struct rt6_info *rt);
- extern void fib6_run_gc(unsigned long dummy);
- extern void fib6_gc_cleanup(void);
- extern void fib6_init(void);
- #endif
- #endif