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