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#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

/*

 *      ndisc options

 */

#define ND_OPT_SOURCE_LL_ADDR           1

#define ND_OPT_TARGET_LL_ADDR           2

#define ND_OPT_PREFIX_INFO              3

#define ND_OPT_REDIRECT_HDR             4

#define ND_OPT_MTU                      5

#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/skbuff.h>

#include <linux/netdevice.h>

#include <linux/icmpv6.h>

#include <net/neighbour.h>

#include <asm/atomic.h>

extern struct neigh_table nd_tbl;

struct nd_msg {

        struct icmp6hdr icmph;

        struct in6_addr target;

        __u8            opt[0];

};

struct ra_msg {

        struct icmp6hdr         icmph;

        __u32                   reachable_time;

        __u32                   retrans_timer;

};

struct nd_opt_hdr {

        __u8            nd_opt_type;

        __u8            nd_opt_len;

} __attribute__((__packed__));

struct ndisc_options {

        struct nd_opt_hdr *nd_opt_array[7];

        struct nd_opt_hdr *nd_opt_piend;

};

#define nd_opts_src_lladdr      nd_opt_array[ND_OPT_SOURCE_LL_ADDR]

#define nd_opts_tgt_lladdr      nd_opt_array[ND_OPT_TARGET_LL_ADDR]

#define nd_opts_pi              nd_opt_array[ND_OPT_PREFIX_INFO]

#define nd_opts_pi_end          nd_opt_piend

#define nd_opts_rh              nd_opt_array[ND_OPT_REDIRECT_HDR]

#define nd_opts_mtu             nd_opt_array[ND_OPT_MTU]

extern struct nd_opt_hdr *ndisc_next_option(struct nd_opt_hdr *cur, struct nd_opt_hdr *end);

extern struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len, struct ndisc_options *ndopts);

extern int                      ndisc_init(struct net_proto_family *ops);

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,

                                              struct in6_addr *solicit,

                                              struct in6_addr *daddr,

                                              struct in6_addr *saddr);

extern void                     ndisc_send_rs(struct net_device *dev,

                                              struct in6_addr *saddr,

                                              struct in6_addr *daddr);

extern void                     ndisc_forwarding_on(void);

extern void                     ndisc_forwarding_off(void);

extern void                     ndisc_send_redirect(struct sk_buff *skb,

                                                    struct neighbour *neigh,

                                                    struct in6_addr *target);

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

struct rt6_info *               dflt_rt_lookup(void);

/*

 *      IGMP

 */

extern int                      igmp6_init(struct net_proto_family *ops);

extern void                     igmp6_cleanup(void);

extern int                      igmp6_event_query(struct sk_buff *skb);

extern int                      igmp6_event_report(struct sk_buff *skb);

extern void                     igmp6_cleanup(void);

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

{

        if (dev)

                return __neigh_lookup(&nd_tbl, addr, dev, 1);

        return NULL;

}

#endif /* __KERNEL__ */

#endif