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 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 23/* 24 * ndisc options 25 */ 26 27enum { 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 */ 34 __ND_OPT_ARRAY_MAX, 35 ND_OPT_ROUTE_INFO = 24, /* RFC4191 */ 36 ND_OPT_RDNSS = 25, /* RFC5006 */ 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 45#define ND_MIN_RANDOM_FACTOR (1/2) 46#define ND_MAX_RANDOM_FACTOR (3/2) 47 48#ifdef __KERNEL__ 49 50#include <linux/compiler.h> 51#include <linux/icmpv6.h> 52#include <linux/in6.h> 53#include <linux/types.h> 54 55#include <net/neighbour.h> 56 57struct ctl_table; 58struct inet6_dev; 59struct net_device; 60struct net_proto_family; 61struct sk_buff; 62 63extern struct neigh_table nd_tbl; 64 65struct nd_msg { 66 struct icmp6hdr icmph; 67 struct in6_addr target; 68 __u8 opt[0]; 69}; 70 71struct rs_msg { 72 struct icmp6hdr icmph; 73 __u8 opt[0]; 74}; 75 76struct ra_msg { 77 struct icmp6hdr icmph; 78 __be32 reachable_time; 79 __be32 retrans_timer; 80}; 81 82struct nd_opt_hdr { 83 __u8 nd_opt_type; 84 __u8 nd_opt_len; 85} __packed; 86 87 88extern int ndisc_init(void); 89 90extern void ndisc_cleanup(void); 91 92extern int ndisc_rcv(struct sk_buff *skb); 93 94extern void ndisc_send_ns(struct net_device *dev, 95 struct neighbour *neigh, 96 const struct in6_addr *solicit, 97 const struct in6_addr *daddr, 98 const struct in6_addr *saddr); 99 100extern void ndisc_send_rs(struct net_device *dev, 101 const struct in6_addr *saddr, 102 const struct in6_addr *daddr); 103 104extern void ndisc_send_redirect(struct sk_buff *skb, 105 struct neighbour *neigh, 106 const struct in6_addr *target); 107 108extern int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir); 109 110extern struct sk_buff *ndisc_build_skb(struct net_device *dev, 111 const struct in6_addr *daddr, 112 const struct in6_addr *saddr, 113 struct icmp6hdr *icmp6h, 114 const struct in6_addr *target, 115 int llinfo); 116 117extern void ndisc_send_skb(struct sk_buff *skb, 118 struct net_device *dev, 119 struct neighbour *neigh, 120 const struct in6_addr *daddr, 121 const struct in6_addr *saddr, 122 struct icmp6hdr *icmp6h); 123 124 125 126/* 127 * IGMP 128 */ 129extern int igmp6_init(void); 130 131extern void igmp6_cleanup(void); 132 133extern int igmp6_event_query(struct sk_buff *skb); 134 135extern int igmp6_event_report(struct sk_buff *skb); 136 137 138#ifdef CONFIG_SYSCTL 139extern int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl, 140 int write, 141 void __user *buffer, 142 size_t *lenp, 143 loff_t *ppos); 144int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl, 145 void __user *oldval, size_t __user *oldlenp, 146 void __user *newval, size_t newlen); 147#endif 148 149extern void inet6_ifinfo_notify(int event, 150 struct inet6_dev *idev); 151 152static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, const struct in6_addr *addr) 153{ 154 155 if (dev) 156 return __neigh_lookup_errno(&nd_tbl, addr, dev); 157 158 return ERR_PTR(-ENODEV); 159} 160 161 162#endif /* __KERNEL__ */ 163 164 165#endif 166