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#define ND_OPT_SOURCE_LL_ADDR 1 19#define ND_OPT_TARGET_LL_ADDR 2 20#define ND_OPT_PREFIX_INFO 3 21#define ND_OPT_REDIRECT_HDR 4 22#define ND_OPT_MTU 5 23 24#define MAX_RTR_SOLICITATION_DELAY HZ 25 26#define ND_REACHABLE_TIME (30*HZ) 27#define ND_RETRANS_TIMER HZ 28 29#define ND_MIN_RANDOM_FACTOR (1/2) 30#define ND_MAX_RANDOM_FACTOR (3/2) 31 32#ifdef __KERNEL__ 33 34#include <linux/skbuff.h> 35#include <linux/netdevice.h> 36#include <linux/icmpv6.h> 37#include <net/neighbour.h> 38#include <asm/atomic.h> 39 40extern struct neigh_table nd_tbl; 41 42struct nd_msg { 43 struct icmp6hdr icmph; 44 struct in6_addr target; 45 __u8 opt[0]; 46}; 47 48struct ra_msg { 49 struct icmp6hdr icmph; 50 __u32 reachable_time; 51 __u32 retrans_timer; 52}; 53 54struct nd_opt_hdr { 55 __u8 nd_opt_type; 56 __u8 nd_opt_len; 57} __attribute__((__packed__)); 58 59struct ndisc_options { 60 struct nd_opt_hdr *nd_opt_array[7]; 61 struct nd_opt_hdr *nd_opt_piend; 62}; 63 64#define nd_opts_src_lladdr nd_opt_array[ND_OPT_SOURCE_LL_ADDR] 65#define nd_opts_tgt_lladdr nd_opt_array[ND_OPT_TARGET_LL_ADDR] 66#define nd_opts_pi nd_opt_array[ND_OPT_PREFIX_INFO] 67#define nd_opts_pi_end nd_opt_piend 68#define nd_opts_rh nd_opt_array[ND_OPT_REDIRECT_HDR] 69#define nd_opts_mtu nd_opt_array[ND_OPT_MTU] 70 71extern struct nd_opt_hdr *ndisc_next_option(struct nd_opt_hdr *cur, struct nd_opt_hdr *end); 72extern struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len, struct ndisc_options *ndopts); 73 74extern int ndisc_init(struct net_proto_family *ops); 75 76extern void ndisc_cleanup(void); 77 78extern int ndisc_rcv(struct sk_buff *skb); 79 80extern void ndisc_send_ns(struct net_device *dev, 81 struct neighbour *neigh, 82 struct in6_addr *solicit, 83 struct in6_addr *daddr, 84 struct in6_addr *saddr); 85 86extern void ndisc_send_rs(struct net_device *dev, 87 struct in6_addr *saddr, 88 struct in6_addr *daddr); 89 90extern void ndisc_forwarding_on(void); 91extern void ndisc_forwarding_off(void); 92 93extern void ndisc_send_redirect(struct sk_buff *skb, 94 struct neighbour *neigh, 95 struct in6_addr *target); 96 97extern int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir); 98 99 100struct rt6_info * dflt_rt_lookup(void); 101 102/* 103 * IGMP 104 */ 105extern int igmp6_init(struct net_proto_family *ops); 106 107extern void igmp6_cleanup(void); 108 109extern int igmp6_event_query(struct sk_buff *skb); 110 111extern int igmp6_event_report(struct sk_buff *skb); 112 113extern void igmp6_cleanup(void); 114 115static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr) 116{ 117 118 if (dev) 119 return __neigh_lookup(&nd_tbl, addr, dev, 1); 120 121 return NULL; 122} 123 124 125#endif /* __KERNEL__ */ 126 127 128#endif 129