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
  60 extern int                      ndisc_init(struct net_proto_family *ops);
  61
  62 extern void                     ndisc_cleanup(void);
  63
  64 extern int                      ndisc_rcv(struct sk_buff *skb);
  65
  66 extern void                     ndisc_send_ns(struct net_device *dev,
  67                                               struct neighbour *neigh,
  68                                               struct in6_addr *solicit,
  69                                               struct in6_addr *daddr,
  70                                               struct in6_addr *saddr);
  71
  72 extern void                     ndisc_send_rs(struct net_device *dev,
  73                                               struct in6_addr *saddr,
  74                                               struct in6_addr *daddr);
  75
  76 extern void                     ndisc_forwarding_on(void);
  77 extern void                     ndisc_forwarding_off(void);
  78
  79 extern void                     ndisc_send_redirect(struct sk_buff *skb,
  80                                                     struct neighbour *neigh,
  81                                                     struct in6_addr *target);
  82
  83 extern int                      ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
  84
  85
  86 struct rt6_info *               dflt_rt_lookup(void);
  87
  88 /*
  89  *      IGMP
  90  */
  91 extern int                      igmp6_init(struct net_proto_family *ops);
  92
  93 extern void                     igmp6_cleanup(void);
  94
  95 extern int                      igmp6_event_query(struct sk_buff *skb);
  96
  97 extern int                      igmp6_event_report(struct sk_buff *skb);
  98
  99 extern void                     igmp6_cleanup(void);
 100
 101 #ifdef CONFIG_SYSCTL
 102 extern int                      ndisc_ifinfo_sysctl_change(ctl_table *ctl,
 103                                                            int write,
 104                                                            struct file * filp,
 105                                                            void __user *buffer,
 106                                                            size_t *lenp);
 107 #endif
 108
 109 extern void                     inet6_ifinfo_notify(int event,
 110                                                     struct inet6_dev *idev);
 111
 112 static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr)
 113 {
 114
 115         if (dev)
 116                 return __neigh_lookup(&nd_tbl, addr, dev, 1);
 117
 118         return NULL;
 119 }
 120
 121
 122 #endif /* __KERNEL__ */
 123
 124
 125 #endif