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_MAX 28 }; 29 30 #define MAX_RTR_SOLICITATION_DELAY HZ 31 32 #define ND_REACHABLE_TIME (30*HZ) 33 #define ND_RETRANS_TIMER HZ 34 35 #define ND_MIN_RANDOM_FACTOR (1/2) 36 #define ND_MAX_RANDOM_FACTOR (3/2) 37 38 #ifdef __KERNEL__ 39 40 #include <linux/compiler.h> 41 #include <linux/icmpv6.h> 42 #include <linux/in6.h> 43 #include <linux/types.h> 44 45 #include <net/neighbour.h> 46 47 struct ctl_table; 48 struct file; 49 struct inet6_dev; 50 struct net_device; 51 struct net_proto_family; 52 struct sk_buff; 53 54 extern struct neigh_table nd_tbl; 55 56 struct nd_msg { 57 struct icmp6hdr icmph; 58 struct in6_addr target; 59 __u8 opt[0]; 60 }; 61 62 struct rs_msg { 63 struct icmp6hdr icmph; 64 __u8 opt[0]; 65 }; 66 67 struct ra_msg { 68 struct icmp6hdr icmph; 69 __u32 reachable_time; 70 __u32 retrans_timer; 71 }; 72 73 struct nd_opt_hdr { 74 __u8 nd_opt_type; 75 __u8 nd_opt_len; 76 } __attribute__((__packed__)); 77 78 79 extern int ndisc_init(struct net_proto_family *ops); 80 81 extern void ndisc_cleanup(void); 82 83 extern int ndisc_rcv(struct sk_buff *skb); 84 85 extern void ndisc_send_ns(struct net_device *dev, 86 struct neighbour *neigh, 87 struct in6_addr *solicit, 88 struct in6_addr *daddr, 89 struct in6_addr *saddr); 90 91 extern void ndisc_send_rs(struct net_device *dev, 92 struct in6_addr *saddr, 93 struct in6_addr *daddr); 94 95 extern void ndisc_forwarding_on(void); 96 extern void ndisc_forwarding_off(void); 97 98 extern void ndisc_send_redirect(struct sk_buff *skb, 99 struct neighbour *neigh, 100 struct in6_addr *target); 101 102 extern int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir); 103 104 105 struct rt6_info * dflt_rt_lookup(void); 106 107 /* 108 * IGMP 109 */ 110 extern int igmp6_init(struct net_proto_family *ops); 111 112 extern void igmp6_cleanup(void); 113 114 extern int igmp6_event_query(struct sk_buff *skb); 115 116 extern int igmp6_event_report(struct sk_buff *skb); 117 118 extern void igmp6_cleanup(void); 119 120 #ifdef CONFIG_SYSCTL 121 extern int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl, 122 int write, 123 struct file * filp, 124 void __user *buffer, 125 size_t *lenp, 126 loff_t *ppos); 127 #endif 128 129 extern void inet6_ifinfo_notify(int event, 130 struct inet6_dev *idev); 131 132 static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr) 133 { 134 135 if (dev) 136 return __neigh_lookup(&nd_tbl, addr, dev, 1); 137 138 return NULL; 139 } 140 141 142 #endif /* __KERNEL__ */ 143 144 145 #endif 146