[mirror_ubuntu-eoan-kernel.git] / include / net / ip6_fib.h

/*
 *	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 fib6_table;

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 fib6_table		*rt6i_table;

	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;
};

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 *);

struct fib6_table {
	struct hlist_node	tb6_hlist;
	u32			tb6_id;
	rwlock_t		tb6_lock;
	struct fib6_node	tb6_root;
};

#define RT6_TABLE_UNSPEC	RT_TABLE_UNSPEC
#define RT6_TABLE_MAIN		RT_TABLE_MAIN
#define RT6_TABLE_DFLT		RT6_TABLE_MAIN
#define RT6_TABLE_INFO		RT6_TABLE_MAIN
#define RT6_TABLE_PREFIX	RT6_TABLE_MAIN

#ifdef CONFIG_IPV6_MULTIPLE_TABLES
#define FIB6_TABLE_MIN		1
#define FIB6_TABLE_MAX		RT_TABLE_MAX
#define RT6_TABLE_LOCAL		RT_TABLE_LOCAL
#else
#define FIB6_TABLE_MIN		RT_TABLE_MAIN
#define FIB6_TABLE_MAX		FIB6_TABLE_MIN
#define RT6_TABLE_LOCAL		RT6_TABLE_MAIN
#endif

#define RT6_F_STRICT		1
#define RT6_F_HAS_SADDR		2

typedef struct rt6_info *(*pol_lookup_t)(struct fib6_table *,
					 struct flowi *, int);

/*
 *	exported functions
 */

extern struct fib6_table *	fib6_get_table(u32 id);
extern struct fib6_table *	fib6_new_table(u32 id);
extern struct dst_entry *	fib6_rule_lookup(struct flowi *fl, int flags,
						 pol_lookup_t lookup);

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_all(int (*func)(struct rt6_info *, void *arg),
					       int prune, void *arg);

extern int			fib6_add(struct fib6_node *root,
					 struct rt6_info *rt,
					 struct nlmsghdr *nlh,
					 void *rtattr,
					 struct netlink_skb_parms *req);

extern int			fib6_del(struct rt6_info *rt,
					 struct nlmsghdr *nlh,
					 void *rtattr,
					 struct netlink_skb_parms *req);

extern void			inet6_rt_notify(int event, struct rt6_info *rt,
						struct nlmsghdr *nlh,
						struct netlink_skb_parms *req);

extern void			fib6_run_gc(unsigned long dummy);

extern void			fib6_gc_cleanup(void);

extern void			fib6_init(void);

extern void			fib6_rules_init(void);
extern void			fib6_rules_cleanup(void);
extern int			fib6_rules_dump(struct sk_buff *,
						struct netlink_callback *);

#endif
#endif
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
c71099ac TG	54	struct fib6_table;
c71099ac TG	55
1da177e4 LT	56	struct rt6_info
	57	{
	58	union {
	59	struct dst_entry dst;
	60	struct rt6_info *next;
	61	} u;
	62
	63	struct inet6_dev *rt6i_idev;
	64
	65	#define rt6i_dev u.dst.dev
	66	#define rt6i_nexthop u.dst.neighbour
	67	#define rt6i_expires u.dst.expires
	68
	69	struct fib6_node *rt6i_node;
	70
	71	struct in6_addr rt6i_gateway;
	72
	73	u32 rt6i_flags;
	74	u32 rt6i_metric;
	75	atomic_t rt6i_ref;
c71099ac	76	struct fib6_table *rt6i_table;
1da177e4 LT	77
	78	struct rt6key rt6i_dst;
	79	struct rt6key rt6i_src;
	80
	81	u8 rt6i_protocol;
	82	};
	83
	84	struct fib6_walker_t
	85	{
	86	struct fib6_walker_t prev, next;
	87	struct fib6_node root, node;
	88	struct rt6_info *leaf;
	89	unsigned char state;
	90	unsigned char prune;
	91	int (func)(struct fib6_walker_t );
	92	void *args;
	93	};
	94
1da177e4 LT	95	struct rt6_statistics {
	96	__u32 fib_nodes;
	97	__u32 fib_route_nodes;
	98	__u32 fib_rt_alloc; /* permanent routes */
	99	__u32 fib_rt_entries; /* rt entries in table */
	100	__u32 fib_rt_cache; /* cache routes */
	101	__u32 fib_discarded_routes;
	102	};
	103
	104	#define RTN_TL_ROOT 0x0001
	105	#define RTN_ROOT 0x0002 /* tree root node */
	106	#define RTN_RTINFO 0x0004 /* node with valid routing info */
	107
	108	/*
	109	* priority levels (or metrics)
	110	*
	111	*/
	112
	113	#define RTPRI_FIREWALL 8 /* Firewall control information */
	114	#define RTPRI_FLOW 16 /* Flow based forwarding rules */
	115	#define RTPRI_KERN_CTL 32 /* Kernel control routes */
	116
	117	#define RTPRI_USER_MIN 256 /* Mimimum user priority */
	118	#define RTPRI_USER_MAX 1024 /* Maximum user priority */
	119
	120	#define RTPRI_KERN_DFLT 4096 /* Kernel default routes */
	121
	122	#define MAX_FLOW_BACKTRACE 32
	123
	124
	125	typedef void (f_pnode)(struct fib6_node fn, void *);
	126
c71099ac TG	127	struct fib6_table {
	128	struct hlist_node tb6_hlist;
	129	u32 tb6_id;
	130	rwlock_t tb6_lock;
	131	struct fib6_node tb6_root;
	132	};
	133
	134	#define RT6_TABLE_UNSPEC RT_TABLE_UNSPEC
	135	#define RT6_TABLE_MAIN RT_TABLE_MAIN
c71099ac TG	136	#define RT6_TABLE_DFLT RT6_TABLE_MAIN
	137	#define RT6_TABLE_INFO RT6_TABLE_MAIN
	138	#define RT6_TABLE_PREFIX RT6_TABLE_MAIN
	139
	140	#ifdef CONFIG_IPV6_MULTIPLE_TABLES
	141	#define FIB6_TABLE_MIN 1
	142	#define FIB6_TABLE_MAX RT_TABLE_MAX
101367c2	143	#define RT6_TABLE_LOCAL RT_TABLE_LOCAL
c71099ac TG	144	#else
	145	#define FIB6_TABLE_MIN RT_TABLE_MAIN
	146	#define FIB6_TABLE_MAX FIB6_TABLE_MIN
101367c2	147	#define RT6_TABLE_LOCAL RT6_TABLE_MAIN
c71099ac TG	148	#endif
	149
	150	#define RT6_F_STRICT 1
	151	#define RT6_F_HAS_SADDR 2
	152
	153	typedef struct rt6_info (pol_lookup_t)(struct fib6_table *,
	154	struct flowi *, int);
1da177e4 LT	155
	156	/*
	157	* exported functions
	158	*/
	159
c71099ac TG	160	extern struct fib6_table * fib6_get_table(u32 id);
	161	extern struct fib6_table * fib6_new_table(u32 id);
	162	extern struct dst_entry * fib6_rule_lookup(struct flowi *fl, int flags,
	163	pol_lookup_t lookup);
	164
1da177e4 LT	165	extern struct fib6_node fib6_lookup(struct fib6_node root,
	166	struct in6_addr *daddr,
	167	struct in6_addr *saddr);
	168
	169	struct fib6_node fib6_locate(struct fib6_node root,
	170	struct in6_addr *daddr, int dst_len,
	171	struct in6_addr *saddr, int src_len);
	172
c71099ac TG	173	extern void fib6_clean_all(int (func)(struct rt6_info , void *arg),
	174	int prune, void *arg);
	175
1da177e4 LT	176	extern int fib6_add(struct fib6_node *root,
	177	struct rt6_info *rt,
	178	struct nlmsghdr *nlh,
0d51aa80 JHS	179	void *rtattr,
0d51aa80 JHS	180	struct netlink_skb_parms *req);
1da177e4 LT	181
	182	extern int fib6_del(struct rt6_info *rt,
	183	struct nlmsghdr *nlh,
0d51aa80 JHS	184	void *rtattr,
0d51aa80 JHS	185	struct netlink_skb_parms *req);
1da177e4 LT	186
1da177e4 LT	187	extern void inet6_rt_notify(int event, struct rt6_info *rt,
0d51aa80 JHS	188	struct nlmsghdr *nlh,
0d51aa80 JHS	189	struct netlink_skb_parms *req);
1da177e4 LT	190
	191	extern void fib6_run_gc(unsigned long dummy);
	192
	193	extern void fib6_gc_cleanup(void);
	194
	195	extern void fib6_init(void);
101367c2 TG	196
	197	extern void fib6_rules_init(void);
	198	extern void fib6_rules_cleanup(void);
	199	extern int fib6_rules_dump(struct sk_buff *,
	200	struct netlink_callback *);
	201
1da177e4 LT	202	#endif
1da177e4 LT	203	#endif