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 #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 57 struct ctl_table; 58 struct file; 59 struct inet6_dev; 60 struct net_device; 61 struct net_proto_family; 62 struct sk_buff; 63 64 extern struct neigh_table nd_tbl; 65 66 struct nd_msg { 67 struct icmp6hdr icmph; 68 struct in6_addr target; 69 __u8 opt[0]; 70 }; 71 72 struct rs_msg { 73 struct icmp6hdr icmph; 74 __u8 opt[0]; 75 }; 76 77 struct ra_msg { 78 struct icmp6hdr icmph; 79 __be32 reachable_time; 80 __be32 retrans_timer; 81 }; 82 83 struct nd_opt_hdr { 84 __u8 nd_opt_type; 85 __u8 nd_opt_len; 86 } __attribute__((__packed__)); 87 88 89 extern int ndisc_init(void); 90 91 extern void ndisc_cleanup(void); 92 93 extern int ndisc_rcv(struct sk_buff *skb); 94 95 extern void ndisc_send_ns(struct net_device *dev, 96 struct neighbour *neigh, 97 const struct in6_addr *solicit, 98 const struct in6_addr *daddr, 99 const struct in6_addr *saddr); 100 101 extern void ndisc_send_rs(struct net_device *dev, 102 const struct in6_addr *saddr, 103 const struct in6_addr *daddr); 104 105 extern void ndisc_send_redirect(struct sk_buff *skb, 106 struct neighbour *neigh, 107 const struct in6_addr *target); 108 109 extern int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir); 110 111 extern struct sk_buff *ndisc_build_skb(struct net_device *dev, 112 const struct in6_addr *daddr, 113 const struct in6_addr *saddr, 114 struct icmp6hdr *icmp6h, 115 const struct in6_addr *target, 116 int llinfo); 117 118 extern void ndisc_send_skb(struct sk_buff *skb, 119 struct net_device *dev, 120 struct neighbour *neigh, 121 const struct in6_addr *daddr, 122 const struct in6_addr *saddr, 123 struct icmp6hdr *icmp6h); 124 125 126 127 /* 128 * IGMP 129 */ 130 extern int igmp6_init(void); 131 132 extern void igmp6_cleanup(void); 133 134 extern int igmp6_event_query(struct sk_buff *skb); 135 136 extern int igmp6_event_report(struct sk_buff *skb); 137 138 139 #ifdef CONFIG_SYSCTL 140 extern int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl, 141 int write, 142 struct file * filp, 143 void __user *buffer, 144 size_t *lenp, 145 loff_t *ppos); 146 int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl, 147 void __user *oldval, size_t __user *oldlenp, 148 void __user *newval, size_t newlen); 149 #endif 150 151 extern void inet6_ifinfo_notify(int event, 152 struct inet6_dev *idev); 153 154 static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, const struct in6_addr *addr) 155 { 156 157 if (dev) 158 return __neigh_lookup_errno(&nd_tbl, addr, dev); 159 160 return ERR_PTR(-ENODEV); 161 } 162 163 164 #endif /* __KERNEL__ */ 165 166 167 #endif 168