[mirror_ubuntu-bionic-kernel.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

#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;
} __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(const 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
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
14c85021	45	#include <linux/compiler.h>
1da177e4	46	#include <linux/icmpv6.h>
14c85021 ACM	47	#include <linux/in6.h>
	48	#include <linux/types.h>
	49
1da177e4	50	#include <net/neighbour.h>
14c85021 ACM	51
14c85021 ACM	52	struct ctl_table;
14c85021 ACM	53	struct inet6_dev;
	54	struct net_device;
	55	struct net_proto_family;
	56	struct sk_buff;
1da177e4 LT	57
	58	extern struct neigh_table nd_tbl;
	59
	60	struct nd_msg {
	61	struct icmp6hdr icmph;
	62	struct in6_addr target;
	63	__u8 opt[0];
	64	};
	65
	66	struct rs_msg {
	67	struct icmp6hdr icmph;
	68	__u8 opt[0];
	69	};
	70
	71	struct ra_msg {
	72	struct icmp6hdr icmph;
e69a4adc AV	73	__be32 reachable_time;
e69a4adc AV	74	__be32 retrans_timer;
1da177e4 LT	75	};
	76
	77	struct nd_opt_hdr {
	78	__u8 nd_opt_type;
	79	__u8 nd_opt_len;
bc10502d	80	} __packed;
1da177e4 LT	81
1da177e4 LT	82
9b0f976f	83	extern int ndisc_init(void);
1da177e4 LT	84
	85	extern void ndisc_cleanup(void);
	86
	87	extern int ndisc_rcv(struct sk_buff *skb);
	88
	89	extern void ndisc_send_ns(struct net_device *dev,
	90	struct neighbour *neigh,
9acd9f3a YH	91	const struct in6_addr *solicit,
	92	const struct in6_addr *daddr,
	93	const struct in6_addr *saddr);
1da177e4 LT	94
1da177e4 LT	95	extern void ndisc_send_rs(struct net_device *dev,
9acd9f3a YH	96	const struct in6_addr *saddr,
9acd9f3a YH	97	const struct in6_addr *daddr);
1da177e4	98
1da177e4 LT	99	extern void ndisc_send_redirect(struct sk_buff *skb,
1da177e4 LT	100	struct neighbour *neigh,
9acd9f3a	101	const struct in6_addr *target);
1da177e4	102
b71d1d42 ED	103	extern int ndisc_mc_map(const struct in6_addr addr, char buf,
b71d1d42 ED	104	struct net_device *dev, int dir);
1da177e4	105
305d552a BH	106	extern struct sk_buff ndisc_build_skb(struct net_device dev,
	107	const struct in6_addr *daddr,
	108	const struct in6_addr *saddr,
	109	struct icmp6hdr *icmp6h,
	110	const struct in6_addr *target,
	111	int llinfo);
	112
	113	extern void ndisc_send_skb(struct sk_buff *skb,
	114	struct net_device *dev,
	115	struct neighbour *neigh,
	116	const struct in6_addr *daddr,
	117	const struct in6_addr *saddr,
	118	struct icmp6hdr *icmp6h);
	119
1da177e4	120
1da177e4 LT	121
	122	/*
	123	* IGMP
	124	*/
9b0f976f	125	extern int igmp6_init(void);
1da177e4 LT	126
	127	extern void igmp6_cleanup(void);
	128
	129	extern int igmp6_event_query(struct sk_buff *skb);
	130
	131	extern int igmp6_event_report(struct sk_buff *skb);
	132
1da177e4 LT	133
1da177e4 LT	134	#ifdef CONFIG_SYSCTL
14c85021	135	extern int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
1da177e4	136	int write,
1da177e4 LT	137	void __user *buffer,
	138	size_t *lenp,
	139	loff_t *ppos);
f221e726 AD	140	int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl,
f221e726 AD	141	void __user oldval, size_t __user oldlenp,
0686caa3	142	void __user *newval, size_t newlen);
1da177e4 LT	143	#endif
	144
	145	extern void inet6_ifinfo_notify(int event,
	146	struct inet6_dev *idev);
	147
9acd9f3a	148	static inline struct neighbour * ndisc_get_neigh(struct net_device dev, const struct in6_addr addr)
1da177e4 LT	149	{
	150
	151	if (dev)
14deae41	152	return __neigh_lookup_errno(&nd_tbl, addr, dev);
1da177e4	153
14deae41	154	return ERR_PTR(-ENODEV);
1da177e4 LT	155	}
1da177e4 LT	156
1da177e4	157	#endif