189 lines
4.0 KiB
C
189 lines
4.0 KiB
C
/*
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* Linux INET6 implementation
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*
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* Authors:
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* Pedro Roque <roque@di.fc.ul.pt>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _IP6_FIB_H
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#define _IP6_FIB_H
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#ifdef __KERNEL__
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#include <linux/ipv6_route.h>
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#include <net/dst.h>
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#include <net/flow.h>
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#include <linux/rtnetlink.h>
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#include <linux/spinlock.h>
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struct rt6_info;
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struct fib6_node
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{
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struct fib6_node *parent;
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struct fib6_node *left;
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struct fib6_node *right;
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struct fib6_node *subtree;
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struct rt6_info *leaf;
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__u16 fn_bit; /* bit key */
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__u16 fn_flags;
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__u32 fn_sernum;
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};
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/*
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* routing information
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*
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*/
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struct rt6key
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{
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struct in6_addr addr;
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int plen;
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};
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struct rt6_info
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{
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union {
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struct dst_entry dst;
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struct rt6_info *next;
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} u;
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struct inet6_dev *rt6i_idev;
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#define rt6i_dev u.dst.dev
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#define rt6i_nexthop u.dst.neighbour
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#define rt6i_expires u.dst.expires
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struct fib6_node *rt6i_node;
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struct in6_addr rt6i_gateway;
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u32 rt6i_flags;
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u32 rt6i_metric;
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atomic_t rt6i_ref;
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struct rt6key rt6i_dst;
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struct rt6key rt6i_src;
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u8 rt6i_protocol;
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};
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struct fib6_walker_t
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{
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struct fib6_walker_t *prev, *next;
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struct fib6_node *root, *node;
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struct rt6_info *leaf;
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unsigned char state;
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unsigned char prune;
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int (*func)(struct fib6_walker_t *);
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void *args;
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};
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extern struct fib6_walker_t fib6_walker_list;
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extern rwlock_t fib6_walker_lock;
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static inline void fib6_walker_link(struct fib6_walker_t *w)
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{
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write_lock_bh(&fib6_walker_lock);
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w->next = fib6_walker_list.next;
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w->prev = &fib6_walker_list;
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w->next->prev = w;
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w->prev->next = w;
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write_unlock_bh(&fib6_walker_lock);
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}
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static inline void fib6_walker_unlink(struct fib6_walker_t *w)
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{
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write_lock_bh(&fib6_walker_lock);
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w->next->prev = w->prev;
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w->prev->next = w->next;
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w->prev = w->next = w;
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write_unlock_bh(&fib6_walker_lock);
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}
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struct rt6_statistics {
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__u32 fib_nodes;
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__u32 fib_route_nodes;
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__u32 fib_rt_alloc; /* permanent routes */
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__u32 fib_rt_entries; /* rt entries in table */
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__u32 fib_rt_cache; /* cache routes */
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__u32 fib_discarded_routes;
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};
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#define RTN_TL_ROOT 0x0001
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#define RTN_ROOT 0x0002 /* tree root node */
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#define RTN_RTINFO 0x0004 /* node with valid routing info */
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/*
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* priority levels (or metrics)
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*
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*/
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#define RTPRI_FIREWALL 8 /* Firewall control information */
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#define RTPRI_FLOW 16 /* Flow based forwarding rules */
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#define RTPRI_KERN_CTL 32 /* Kernel control routes */
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#define RTPRI_USER_MIN 256 /* Mimimum user priority */
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#define RTPRI_USER_MAX 1024 /* Maximum user priority */
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#define RTPRI_KERN_DFLT 4096 /* Kernel default routes */
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#define MAX_FLOW_BACKTRACE 32
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typedef void (*f_pnode)(struct fib6_node *fn, void *);
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extern struct fib6_node ip6_routing_table;
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/*
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* exported functions
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*/
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extern struct fib6_node *fib6_lookup(struct fib6_node *root,
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struct in6_addr *daddr,
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struct in6_addr *saddr);
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struct fib6_node *fib6_locate(struct fib6_node *root,
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struct in6_addr *daddr, int dst_len,
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struct in6_addr *saddr, int src_len);
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extern void fib6_clean_tree(struct fib6_node *root,
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int (*func)(struct rt6_info *, void *arg),
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int prune, void *arg);
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extern int fib6_walk(struct fib6_walker_t *w);
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extern int fib6_walk_continue(struct fib6_walker_t *w);
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extern int fib6_add(struct fib6_node *root,
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struct rt6_info *rt,
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struct nlmsghdr *nlh,
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void *rtattr,
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struct netlink_skb_parms *req);
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extern int fib6_del(struct rt6_info *rt,
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struct nlmsghdr *nlh,
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void *rtattr,
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struct netlink_skb_parms *req);
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extern void inet6_rt_notify(int event, struct rt6_info *rt,
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struct nlmsghdr *nlh,
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struct netlink_skb_parms *req);
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extern void fib6_run_gc(unsigned long dummy);
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extern void fib6_gc_cleanup(void);
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extern void fib6_init(void);
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#endif
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#endif
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