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_MAX 26 }; 27 28 #define MAX_RTR_SOLICITATION_DELAY HZ 29 30 #define ND_REACHABLE_TIME (30*HZ) 31 #define ND_RETRANS_TIMER HZ 32 33 #define ND_MIN_RANDOM_FACTOR (1/2) 34 #define ND_MAX_RANDOM_FACTOR (3/2) 35 36 #ifdef __KERNEL__ 37 38 #include <linux/skbuff.h> 39 #include <linux/netdevice.h> 40 #include <linux/icmpv6.h> 41 #include <net/neighbour.h> 42 #include <asm/atomic.h> 43 44 extern struct neigh_table nd_tbl; 45 46 struct nd_msg { 47 struct icmp6hdr icmph; 48 struct in6_addr target; 49 __u8 opt[0]; 50 }; 51 52 struct rs_msg { 53 struct icmp6hdr icmph; 54 __u8 opt[0]; 55 }; 56 57 struct ra_msg { 58 struct icmp6hdr icmph; 59 __u32 reachable_time; 60 __u32 retrans_timer; 61 }; 62 63 struct nd_opt_hdr { 64 __u8 nd_opt_type; 65 __u8 nd_opt_len; 66 } __attribute__((__packed__)); 67 68 69 extern int ndisc_init(struct net_proto_family *ops); 70 71 extern void ndisc_cleanup(void); 72 73 extern int ndisc_rcv(struct sk_buff *skb); 74 75 extern void ndisc_send_ns(struct net_device *dev, 76 struct neighbour *neigh, 77 struct in6_addr *solicit, 78 struct in6_addr *daddr, 79 struct in6_addr *saddr); 80 81 extern void ndisc_send_rs(struct net_device *dev, 82 struct in6_addr *saddr, 83 struct in6_addr *daddr); 84 85 extern void ndisc_forwarding_on(void); 86 extern void ndisc_forwarding_off(void); 87 88 extern void ndisc_send_redirect(struct sk_buff *skb, 89 struct neighbour *neigh, 90 struct in6_addr *target); 91 92 extern int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir); 93 94 95 struct rt6_info * dflt_rt_lookup(void); 96 97 /* 98 * IGMP 99 */ 100 extern int igmp6_init(struct net_proto_family *ops); 101 102 extern void igmp6_cleanup(void); 103 104 extern int igmp6_event_query(struct sk_buff *skb); 105 106 extern int igmp6_event_report(struct sk_buff *skb); 107 108 extern void igmp6_cleanup(void); 109 110 #ifdef CONFIG_SYSCTL 111 extern int ndisc_ifinfo_sysctl_change(ctl_table *ctl, 112 int write, 113 struct file * filp, 114 void __user *buffer, 115 size_t *lenp, 116 loff_t *ppos); 117 #endif 118 119 extern void inet6_ifinfo_notify(int event, 120 struct inet6_dev *idev); 121 122 static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr) 123 { 124 125 if (dev) 126 return __neigh_lookup(&nd_tbl, addr, dev, 1); 127 128 return NULL; 129 } 130 131 132 #endif /* __KERNEL__ */ 133 134 135 #endif 136