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 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/config.h>
  39 #include <linux/compiler.h>
  40 #include <linux/icmpv6.h>
  41 #include <linux/in6.h>
  42 #include <linux/types.h>
  43
  44 #include <net/neighbour.h>
  45
  46 struct ctl_table;
  47 struct file;
  48 struct inet6_dev;
  49 struct net_device;
  50 struct net_proto_family;
  51 struct sk_buff;
  52
  53 extern struct neigh_table nd_tbl;
  54
  55 struct nd_msg {
  56         struct icmp6hdr icmph;
  57         struct in6_addr target;
  58         __u8            opt[0];
  59 };
  60
  61 struct rs_msg {
  62         struct icmp6hdr icmph;
  63         __u8            opt[0];
  64 };
  65
  66 struct ra_msg {
  67         struct icmp6hdr         icmph;
  68         __u32                   reachable_time;
  69         __u32                   retrans_timer;
  70 };
  71
  72 struct nd_opt_hdr {
  73         __u8            nd_opt_type;
  74         __u8            nd_opt_len;
  75 } __attribute__((__packed__));
  76
  77
  78 extern int                      ndisc_init(struct net_proto_family *ops);
  79
  80 extern void                     ndisc_cleanup(void);
  81
  82 extern int                      ndisc_rcv(struct sk_buff *skb);
  83
  84 extern void                     ndisc_send_ns(struct net_device *dev,
  85                                               struct neighbour *neigh,
  86                                               struct in6_addr *solicit,
  87                                               struct in6_addr *daddr,
  88                                               struct in6_addr *saddr);
  89
  90 extern void                     ndisc_send_rs(struct net_device *dev,
  91                                               struct in6_addr *saddr,
  92                                               struct in6_addr *daddr);
  93
  94 extern void                     ndisc_forwarding_on(void);
  95 extern void                     ndisc_forwarding_off(void);
  96
  97 extern void                     ndisc_send_redirect(struct sk_buff *skb,
  98                                                     struct neighbour *neigh,
  99                                                     struct in6_addr *target);
 100
 101 extern int                      ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
 102
 103
 104 struct rt6_info *               dflt_rt_lookup(void);
 105
 106 /*
 107  *      IGMP
 108  */
 109 extern int                      igmp6_init(struct net_proto_family *ops);
 110
 111 extern void                     igmp6_cleanup(void);
 112
 113 extern int                      igmp6_event_query(struct sk_buff *skb);
 114
 115 extern int                      igmp6_event_report(struct sk_buff *skb);
 116
 117 extern void                     igmp6_cleanup(void);
 118
 119 #ifdef CONFIG_SYSCTL
 120 extern int                      ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
 121                                                            int write,
 122                                                            struct file * filp,
 123                                                            void __user *buffer,
 124                                                            size_t *lenp,
 125                                                            loff_t *ppos);
 126 #endif
 127
 128 extern void                     inet6_ifinfo_notify(int event,
 129                                                     struct inet6_dev *idev);
 130
 131 static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr)
 132 {
 133
 134         if (dev)
 135                 return __neigh_lookup(&nd_tbl, addr, dev, 1);
 136
 137         return NULL;
 138 }
 139
 140
 141 #endif /* __KERNEL__ */
 142
 143
 144 #endif