#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_SYSCTLextern 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