diff options
Diffstat (limited to 'include/net/ip6_fib.h')
| -rw-r--r-- | include/net/ip6_fib.h | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h new file mode 100644 index 00000000000..31990451819 --- /dev/null +++ b/include/net/ip6_fib.h @@ -0,0 +1,185 @@ +/* + * 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> +#include <linux/spinlock.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; + + struct inet6_dev *rt6i_idev; + +#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; + atomic_t rt6i_ref; + + struct rt6key rt6i_dst; + struct rt6key rt6i_src; + + u8 rt6i_protocol; +}; + +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; /* permanent routes */ + __u32 fib_rt_entries; /* rt entries in table */ + __u32 fib_rt_cache; /* cache routes */ + __u32 fib_discarded_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, + struct nlmsghdr *nlh, + void *rtattr); + +extern int fib6_del(struct rt6_info *rt, + struct nlmsghdr *nlh, + void *rtattr); + +extern void inet6_rt_notify(int event, struct rt6_info *rt, + struct nlmsghdr *nlh); + +extern void fib6_run_gc(unsigned long dummy); + +extern void fib6_gc_cleanup(void); + +extern void fib6_init(void); +#endif +#endif |