[linux-block.git] / include / net / ndisc.h

#ifndef _NDISC_H
#define _NDISC_H

/*
 *	ICMP codes for neighbour discovery messages
 */

#define NDISC_ROUTER_SOLICITATION	133
#define NDISC_ROUTER_ADVERTISEMENT	134
#define NDISC_NEIGHBOUR_SOLICITATION	135
#define NDISC_NEIGHBOUR_ADVERTISEMENT	136
#define NDISC_REDIRECT			137

/*
 * Router type: cross-layer information from link-layer to
 * IPv6 layer reported by certain link types (e.g., RFC4214).
 */
#define NDISC_NODETYPE_UNSPEC		0	/* unspecified (default) */
#define NDISC_NODETYPE_HOST		1	/* host or unauthorized router */
#define NDISC_NODETYPE_NODEFAULT	2	/* non-default router */
#define NDISC_NODETYPE_DEFAULT		3	/* default router */

/*
 *	ndisc options
 */

enum {
	__ND_OPT_PREFIX_INFO_END = 0,
	ND_OPT_SOURCE_LL_ADDR = 1,	/* RFC2461 */
	ND_OPT_TARGET_LL_ADDR = 2,	/* RFC2461 */
	ND_OPT_PREFIX_INFO = 3,		/* RFC2461 */
	ND_OPT_REDIRECT_HDR = 4,	/* RFC2461 */
	ND_OPT_MTU = 5,			/* RFC2461 */
	__ND_OPT_ARRAY_MAX,
	ND_OPT_ROUTE_INFO = 24,		/* RFC4191 */
	ND_OPT_RDNSS = 25,		/* RFC5006 */
	__ND_OPT_MAX
};

#define MAX_RTR_SOLICITATION_DELAY	HZ

#define ND_REACHABLE_TIME		(30*HZ)
#define ND_RETRANS_TIMER		HZ

#define ND_MIN_RANDOM_FACTOR		(1/2)
#define ND_MAX_RANDOM_FACTOR		(3/2)

#ifdef __KERNEL__

#include <linux/compiler.h>
#include <linux/icmpv6.h>
#include <linux/in6.h>
#include <linux/types.h>

#include <net/neighbour.h>

struct ctl_table;
struct inet6_dev;
struct net_device;
struct net_proto_family;
struct sk_buff;

extern struct neigh_table nd_tbl;

struct nd_msg {
        struct icmp6hdr	icmph;
        struct in6_addr	target;
	__u8		opt[0];
};

struct rs_msg {
	struct icmp6hdr	icmph;
	__u8		opt[0];
};

struct ra_msg {
        struct icmp6hdr		icmph;
	__be32			reachable_time;
	__be32			retrans_timer;
};

struct nd_opt_hdr {
	__u8		nd_opt_type;
	__u8		nd_opt_len;
} __attribute__((__packed__));


extern int			ndisc_init(void);

extern void			ndisc_cleanup(void);

extern int			ndisc_rcv(struct sk_buff *skb);

extern void			ndisc_send_ns(struct net_device *dev,
					      struct neighbour *neigh,
					      const struct in6_addr *solicit,
					      const struct in6_addr *daddr,
					      const struct in6_addr *saddr);

extern void			ndisc_send_rs(struct net_device *dev,
					      const struct in6_addr *saddr,
					      const struct in6_addr *daddr);

extern void			ndisc_send_redirect(struct sk_buff *skb,
						    struct neighbour *neigh,
						    const struct in6_addr *target);

extern int			ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);

extern struct sk_buff		*ndisc_build_skb(struct net_device *dev,
						 const struct in6_addr *daddr,
						 const struct in6_addr *saddr,
						 struct icmp6hdr *icmp6h,
						 const struct in6_addr *target,
						 int llinfo);

extern void			ndisc_send_skb(struct sk_buff *skb,
					       struct net_device *dev,
					       struct neighbour *neigh,
					       const struct in6_addr *daddr,
					       const struct in6_addr *saddr,
					       struct icmp6hdr *icmp6h);


/*
 *	IGMP
 */
extern int			igmp6_init(void);

extern void			igmp6_cleanup(void);

extern int			igmp6_event_query(struct sk_buff *skb);

extern int			igmp6_event_report(struct sk_buff *skb);


#ifdef CONFIG_SYSCTL
extern int 			ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
							   int write,
							   void __user *buffer,
							   size_t *lenp,
							   loff_t *ppos);
int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl,
				 void __user *oldval, size_t __user *oldlenp,
				 void __user *newval, size_t newlen);
#endif

extern void 			inet6_ifinfo_notify(int event,
						    struct inet6_dev *idev);

static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, const struct in6_addr *addr)
{

	if (dev)
		return __neigh_lookup_errno(&nd_tbl, addr, dev);

	return ERR_PTR(-ENODEV);
}


#endif /* __KERNEL__ */


#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _NDISC_H
	2	#define _NDISC_H
	3
	4	/*
	5	* ICMP codes for neighbour discovery messages
	6	*/
	7
	8	#define NDISC_ROUTER_SOLICITATION 133
	9	#define NDISC_ROUTER_ADVERTISEMENT 134
	10	#define NDISC_NEIGHBOUR_SOLICITATION 135
	11	#define NDISC_NEIGHBOUR_ADVERTISEMENT 136
	12	#define NDISC_REDIRECT 137
	13
fadf6bf0 TF	14	/*
	15	* Router type: cross-layer information from link-layer to
	16	* IPv6 layer reported by certain link types (e.g., RFC4214).
	17	*/
	18	#define NDISC_NODETYPE_UNSPEC 0 /* unspecified (default) */
	19	#define NDISC_NODETYPE_HOST 1 /* host or unauthorized router */
	20	#define NDISC_NODETYPE_NODEFAULT 2 /* non-default router */
	21	#define NDISC_NODETYPE_DEFAULT 3 /* default router */
	22
1da177e4 LT	23	/*
	24	* ndisc options
	25	*/
	26
	27	enum {
	28	__ND_OPT_PREFIX_INFO_END = 0,
	29	ND_OPT_SOURCE_LL_ADDR = 1, /* RFC2461 */
	30	ND_OPT_TARGET_LL_ADDR = 2, /* RFC2461 */
	31	ND_OPT_PREFIX_INFO = 3, /* RFC2461 */
	32	ND_OPT_REDIRECT_HDR = 4, /* RFC2461 */
	33	ND_OPT_MTU = 5, /* RFC2461 */
70ceb4f5 YH	34	__ND_OPT_ARRAY_MAX,
70ceb4f5 YH	35	ND_OPT_ROUTE_INFO = 24, /* RFC4191 */
31910575	36	ND_OPT_RDNSS = 25, /* RFC5006 */
1da177e4 LT	37	__ND_OPT_MAX
	38	};
	39
	40	#define MAX_RTR_SOLICITATION_DELAY HZ
	41
	42	#define ND_REACHABLE_TIME (30*HZ)
	43	#define ND_RETRANS_TIMER HZ
	44
	45	#define ND_MIN_RANDOM_FACTOR (1/2)
	46	#define ND_MAX_RANDOM_FACTOR (3/2)
	47
	48	#ifdef __KERNEL__
	49
14c85021	50	#include <linux/compiler.h>
1da177e4	51	#include <linux/icmpv6.h>
14c85021 ACM	52	#include <linux/in6.h>
	53	#include <linux/types.h>
	54
1da177e4	55	#include <net/neighbour.h>
14c85021 ACM	56
14c85021 ACM	57	struct ctl_table;
14c85021 ACM	58	struct inet6_dev;
	59	struct net_device;
	60	struct net_proto_family;
	61	struct sk_buff;
1da177e4 LT	62
	63	extern struct neigh_table nd_tbl;
	64
	65	struct nd_msg {
	66	struct icmp6hdr icmph;
	67	struct in6_addr target;
	68	__u8 opt[0];
	69	};
	70
	71	struct rs_msg {
	72	struct icmp6hdr icmph;
	73	__u8 opt[0];
	74	};
	75
	76	struct ra_msg {
	77	struct icmp6hdr icmph;
e69a4adc AV	78	__be32 reachable_time;
e69a4adc AV	79	__be32 retrans_timer;
1da177e4 LT	80	};
	81
	82	struct nd_opt_hdr {
	83	__u8 nd_opt_type;
	84	__u8 nd_opt_len;
	85	} __attribute__((__packed__));
	86
	87
9b0f976f	88	extern int ndisc_init(void);
1da177e4 LT	89
	90	extern void ndisc_cleanup(void);
	91
	92	extern int ndisc_rcv(struct sk_buff *skb);
	93
	94	extern void ndisc_send_ns(struct net_device *dev,
	95	struct neighbour *neigh,
9acd9f3a YH	96	const struct in6_addr *solicit,
	97	const struct in6_addr *daddr,
	98	const struct in6_addr *saddr);
1da177e4 LT	99
1da177e4 LT	100	extern void ndisc_send_rs(struct net_device *dev,
9acd9f3a YH	101	const struct in6_addr *saddr,
9acd9f3a YH	102	const struct in6_addr *daddr);
1da177e4	103
1da177e4 LT	104	extern void ndisc_send_redirect(struct sk_buff *skb,
1da177e4 LT	105	struct neighbour *neigh,
9acd9f3a	106	const struct in6_addr *target);
1da177e4 LT	107
	108	extern int ndisc_mc_map(struct in6_addr addr, char buf, struct net_device *dev, int dir);
	109
305d552a BH	110	extern struct sk_buff ndisc_build_skb(struct net_device dev,
	111	const struct in6_addr *daddr,
	112	const struct in6_addr *saddr,
	113	struct icmp6hdr *icmp6h,
	114	const struct in6_addr *target,
	115	int llinfo);
	116
	117	extern void ndisc_send_skb(struct sk_buff *skb,
	118	struct net_device *dev,
	119	struct neighbour *neigh,
	120	const struct in6_addr *daddr,
	121	const struct in6_addr *saddr,
	122	struct icmp6hdr *icmp6h);
	123
1da177e4	124
1da177e4 LT	125
	126	/*
	127	* IGMP
	128	*/
9b0f976f	129	extern int igmp6_init(void);
1da177e4 LT	130
	131	extern void igmp6_cleanup(void);
	132
	133	extern int igmp6_event_query(struct sk_buff *skb);
	134
	135	extern int igmp6_event_report(struct sk_buff *skb);
	136
1da177e4 LT	137
1da177e4 LT	138	#ifdef CONFIG_SYSCTL
14c85021	139	extern int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
1da177e4	140	int write,
1da177e4 LT	141	void __user *buffer,
	142	size_t *lenp,
	143	loff_t *ppos);
f221e726 AD	144	int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl,
f221e726 AD	145	void __user oldval, size_t __user oldlenp,
0686caa3	146	void __user *newval, size_t newlen);
1da177e4 LT	147	#endif
	148
	149	extern void inet6_ifinfo_notify(int event,
	150	struct inet6_dev *idev);
	151
9acd9f3a	152	static inline struct neighbour * ndisc_get_neigh(struct net_device dev, const struct in6_addr addr)
1da177e4 LT	153	{
	154
	155	if (dev)
14deae41	156	return __neigh_lookup_errno(&nd_tbl, addr, dev);
1da177e4	157
14deae41	158	return ERR_PTR(-ENODEV);
1da177e4 LT	159	}
	160
	161
	162	#endif /* __KERNEL__ */
	163
	164
	165	#endif