include/net/ndisc.h

   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
  40 extern struct neigh_table nd_tbl;
  41
  42 struct nd_msg {
  43         struct icmp6hdr icmph;
  44         struct in6_addr target;
  45         __u8            opt[0];
  46 };
  47
  48 struct ra_msg {
  49         struct icmp6hdr         icmph;
  50         __u32                   reachable_time;
  51         __u32                   retrans_timer;
  52 };
  53
  54 struct nd_opt_hdr {
  55         __u8            nd_opt_type;
  56         __u8            nd_opt_len;
  57 } __attribute__((__packed__));
  58
  59 struct 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
  71 extern struct nd_opt_hdr *ndisc_next_option(struct nd_opt_hdr *cur, struct nd_opt_hdr *end);
  72 extern struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len, struct ndisc_options *ndopts);
  73
  74 extern int                      ndisc_init(struct net_proto_family *ops);
  75
  76 extern void                     ndisc_cleanup(void);
  77
  78 extern int                      ndisc_rcv(struct sk_buff *skb);
  79
  80 extern 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
  86 extern void                     ndisc_send_rs(struct net_device *dev,
  87                                               struct in6_addr *saddr,
  88                                               struct in6_addr *daddr);
  89
  90 extern void                     ndisc_forwarding_on(void);
  91 extern void                     ndisc_forwarding_off(void);
  92
  93 extern void                     ndisc_send_redirect(struct sk_buff *skb,
  94                                                     struct neighbour *neigh,
  95                                                     struct in6_addr *target);
  96
  97 extern int                      ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
  98
  99
 100 struct rt6_info *               dflt_rt_lookup(void);
 101
 102 /*
 103  *      IGMP
 104  */
 105 extern int                      igmp6_init(struct net_proto_family *ops);
 106
 107 extern void                     igmp6_cleanup(void);
 108
 109 extern int                      igmp6_event_query(struct sk_buff *skb);
 110
 111 extern int                      igmp6_event_report(struct sk_buff *skb);
 112
 113 extern void                     igmp6_cleanup(void);
 114
 115 static 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