#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 file; 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); /* * 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, struct file * filp, void __user *buffer, size_t *lenp, loff_t *ppos); #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(&nd_tbl, addr, dev, 1); return NULL; } #endif /* __KERNEL__ */ #endif