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#ifndef _NDISC_H
#define _NDISC_H
/*
* Neighbor Cache Entry States (7.3.2.)
*/
/*
* The lsb is set for states that have a timer associated
*/
#define NUD_NONE 0x00
#define NUD_INCOMPLETE 0x11
#define NUD_REACHABLE 0x20
#define NUD_STALE 0x30
#define NUD_DELAY 0x41
#define NUD_PROBE 0x51
#define NUD_FAILED 0x60 /* neighbour discovery failed */
#define NUD_IN_TIMER 0x01
#define NDISC_QUEUE_LEN 3
#define NCF_NOARP 0x0100 /* no ARP needed on this device */
#define NCF_SUBNET 0x0200 /* NC entry for subnet */
#define NCF_INVALID 0x0400
#define NCF_DELAY_EXPIRED 0x0800 /* time to move to PROBE */
#define NCF_ROUTER 0x1000 /* neighbour is a router */
#define NCF_HHVALID 0x2000 /* Hardware header is valid */
/*
* 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 RECHABLE_TIME (30*HZ)
#define RETRANS_TIMER HZ
#define MIN_RANDOM_FACTOR (1/2)
#define MAX_RANDOM_FACTOR (3/2)
#define REACH_RANDOM_INTERVAL (60*60*HZ) /* 1 hour */
#ifdef __KERNEL__
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/icmpv6.h>
#include <net/neighbour.h>
#include <asm/atomic.h>
/*
* neighbour cache entry
* used by neighbour discovery module
*/
struct nd_neigh {
struct neighbour neigh;
struct in6_addr ndn_addr; /* next hop addr */
__u8 ndn_plen, /* prefix len */
ndn_type, /* {unicast, multicast} */
ndn_nud_state,
ndn_probes;
unsigned long ndn_expires; /* timer expires at */
#define ndn_refcnt neigh.refcnt
#define ndn_tstamp neigh.lastused
#define ndn_dev neigh.dev
#define ndn_flags neigh.flags
#define ndn_ha neigh.ha
};
struct nd_msg {
struct icmp6hdr icmph;
struct in6_addr target;
struct {
__u8 opt_type;
__u8 opt_len;
__u8 link_addr[MAX_ADDR_LEN];
} opt;
};
struct ra_msg {
struct icmp6hdr icmph;
__u32 reachable_time;
__u32 retrans_timer;
};
struct ndisc_statistics {
__u32 allocs; /* allocated entries */
__u32 free_delayed; /* zombie entries */
__u32 snt_probes_ucast; /* ns probes sent (ucast) */
__u32 snt_probes_mcast; /* ns probes sent (mcast) */
__u32 rcv_probes_ucast; /* ns probes rcv (ucast) */
__u32 rcv_probes_mcast; /* ns probes rcv (mcast) */
__u32 rcv_upper_conf; /* confirmations from upper layers */
__u32 res_failed; /* address resolution failures */
};
extern struct neighbour * ndisc_find_neigh(struct device *dev,
struct in6_addr *addr);
extern void ndisc_validate(struct neighbour *neigh);
extern void ndisc_init(struct net_proto_family *ops);
extern struct neighbour* ndisc_get_neigh(struct device *dev,
struct in6_addr *addr);
extern void ndisc_cleanup(void);
extern int ndisc_rcv(struct sk_buff *skb,
struct device *dev,
struct in6_addr *saddr,
struct in6_addr *daddr,
struct ipv6_options *opt,
unsigned short len);
extern void ndisc_event_send(struct neighbour *neigh,
struct sk_buff *skb);
extern void ndisc_send_ns(struct device *dev,
struct neighbour *neigh,
struct in6_addr *solicit,
struct in6_addr *daddr,
struct in6_addr *saddr);
extern void ndisc_send_rs(struct device *dev,
struct in6_addr *saddr,
struct in6_addr *daddr);
extern int ndisc_eth_resolv(unsigned char *,
struct sk_buff *);
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);
struct rt6_info * dflt_rt_lookup(void);
extern unsigned long nd_rand_seed;
extern unsigned long ipv6_random(void);
/*
* IGMP
*/
extern void igmp6_init(struct net_proto_family *ops);
extern int igmp6_event_query(struct sk_buff *skb,
struct icmp6hdr *hdr,
int len);
extern int igmp6_event_report(struct sk_buff *skb,
struct icmp6hdr *hdr,
int len);
#endif /* __KERNEL__ */
#endif
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