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 rs_msg {
  49         struct icmp6hdr icmph;
  50         __u8            opt[0];
  51 };
  52
  53 struct ra_msg {
  54         struct icmp6hdr         icmph;
  55         __u32                   reachable_time;
  56         __u32                   retrans_timer;
  57 };
  58
  59 struct nd_opt_hdr {
  60         __u8            nd_opt_type;
  61         __u8            nd_opt_len;
  62 } __attribute__((__packed__));
  63
  64
  65 extern int                      ndisc_init(struct net_proto_family *ops);
  66
  67 extern void                     ndisc_cleanup(void);
  68
  69 extern int                      ndisc_rcv(struct sk_buff *skb);
  70
  71 extern void                     ndisc_send_ns(struct net_device *dev,
  72                                               struct neighbour *neigh,
  73                                               struct in6_addr *solicit,
  74                                               struct in6_addr *daddr,
  75                                               struct in6_addr *saddr);
  76
  77 extern void                     ndisc_send_rs(struct net_device *dev,
  78                                               struct in6_addr *saddr,
  79                                               struct in6_addr *daddr);
  80
  81 extern void                     ndisc_forwarding_on(void);
  82 extern void                     ndisc_forwarding_off(void);
  83
  84 extern void                     ndisc_send_redirect(struct sk_buff *skb,
  85                                                     struct neighbour *neigh,
  86                                                     struct in6_addr *target);
  87
  88 extern int                      ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
  89
  90
  91 struct rt6_info *               dflt_rt_lookup(void);
  92
  93 /*
  94  *      IGMP
  95  */
  96 extern int                      igmp6_init(struct net_proto_family *ops);
  97
  98 extern void                     igmp6_cleanup(void);
  99
 100 extern int                      igmp6_event_query(struct sk_buff *skb);
 101
 102 extern int                      igmp6_event_report(struct sk_buff *skb);
 103
 104 extern void                     igmp6_cleanup(void);
 105
 106 #ifdef CONFIG_SYSCTL
 107 extern int                      ndisc_ifinfo_sysctl_change(ctl_table *ctl,
 108                                                            int write,
 109                                                            struct file * filp,
 110                                                            void __user *buffer,
 111                                                            size_t *lenp,
 112                                                            loff_t *ppos);
 113 #endif
 114
 115 extern void                     inet6_ifinfo_notify(int event,
 116                                                     struct inet6_dev *idev);
 117
 118 static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr)
 119 {
 120
 121         if (dev)
 122                 return __neigh_lookup(&nd_tbl, addr, dev, 1);
 123
 124         return NULL;
 125 }
 126
 127
 128 #endif /* __KERNEL__ */
 129
 130
 131 #endif