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