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 * ndisc options 16 */ 17 18 enum { 19 __ND_OPT_PREFIX_INFO_END = 0, 20 ND_OPT_SOURCE_LL_ADDR = 1, /* RFC2461 */ 21 ND_OPT_TARGET_LL_ADDR = 2, /* RFC2461 */ 22 ND_OPT_PREFIX_INFO = 3, /* RFC2461 */ 23 ND_OPT_REDIRECT_HDR = 4, /* RFC2461 */ 24 ND_OPT_MTU = 5, /* RFC2461 */ 25 __ND_OPT_ARRAY_MAX, 26 ND_OPT_ROUTE_INFO = 24, /* RFC4191 */ 27 ND_OPT_RDNSS = 25, /* RFC5006 */ 28 __ND_OPT_MAX 29 }; 30 31 #define MAX_RTR_SOLICITATION_DELAY HZ 32 33 #define ND_REACHABLE_TIME (30*HZ) 34 #define ND_RETRANS_TIMER HZ 35 36 #define ND_MIN_RANDOM_FACTOR (1/2) 37 #define ND_MAX_RANDOM_FACTOR (3/2) 38 39 #ifdef __KERNEL__ 40 41 #include <linux/compiler.h> 42 #include <linux/icmpv6.h> 43 #include <linux/in6.h> 44 #include <linux/types.h> 45 46 #include <net/neighbour.h> 47 48 struct ctl_table; 49 struct file; 50 struct inet6_dev; 51 struct net_device; 52 struct net_proto_family; 53 struct sk_buff; 54 55 extern struct neigh_table nd_tbl; 56 57 struct nd_msg { 58 struct icmp6hdr icmph; 59 struct in6_addr target; 60 __u8 opt[0]; 61 }; 62 63 struct rs_msg { 64 struct icmp6hdr icmph; 65 __u8 opt[0]; 66 }; 67 68 struct ra_msg { 69 struct icmp6hdr icmph; 70 __be32 reachable_time; 71 __be32 retrans_timer; 72 }; 73 74 struct nd_opt_hdr { 75 __u8 nd_opt_type; 76 __u8 nd_opt_len; 77 } __attribute__((__packed__)); 78 79 80 extern int ndisc_init(struct net_proto_family *ops); 81 82 extern void ndisc_cleanup(void); 83 84 extern int ndisc_rcv(struct sk_buff *skb); 85 86 extern void ndisc_send_ns(struct net_device *dev, 87 struct neighbour *neigh, 88 struct in6_addr *solicit, 89 struct in6_addr *daddr, 90 struct in6_addr *saddr); 91 92 extern void ndisc_send_rs(struct net_device *dev, 93 struct in6_addr *saddr, 94 struct in6_addr *daddr); 95 96 extern void ndisc_forwarding_on(void); 97 extern void ndisc_forwarding_off(void); 98 99 extern void ndisc_send_redirect(struct sk_buff *skb, 100 struct neighbour *neigh, 101 struct in6_addr *target); 102 103 extern int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir); 104 105 106 struct rt6_info * dflt_rt_lookup(void); 107 108 /* 109 * IGMP 110 */ 111 extern int igmp6_init(struct net_proto_family *ops); 112 113 extern void igmp6_cleanup(void); 114 115 extern int igmp6_event_query(struct sk_buff *skb); 116 117 extern int igmp6_event_report(struct sk_buff *skb); 118 119 extern void igmp6_cleanup(void); 120 121 #ifdef CONFIG_SYSCTL 122 extern int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl, 123 int write, 124 struct file * filp, 125 void __user *buffer, 126 size_t *lenp, 127 loff_t *ppos); 128 #endif 129 130 extern void inet6_ifinfo_notify(int event, 131 struct inet6_dev *idev); 132 133 static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr) 134 { 135 136 if (dev) 137 return __neigh_lookup(&nd_tbl, addr, dev, 1); 138 139 return NULL; 140 } 141 142 143 #endif /* __KERNEL__ */ 144 145 146 #endif 147