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_ARRAY_MAX,
  26         ND_OPT_ROUTE_INFO = 24,         /* RFC4191 */
  27         __ND_OPT_MAX
  28 };
  29
  30 #define MAX_RTR_SOLICITATION_DELAY      HZ
  31
  32 #define ND_REACHABLE_TIME               (30*HZ)
  33 #define ND_RETRANS_TIMER                HZ
  34
  35 #define ND_MIN_RANDOM_FACTOR            (1/2)
  36 #define ND_MAX_RANDOM_FACTOR            (3/2)
  37
  38 #ifdef __KERNEL__
  39
  40 #include <linux/compiler.h>
  41 #include <linux/icmpv6.h>
  42 #include <linux/in6.h>
  43 #include <linux/types.h>
  44
  45 #include <net/neighbour.h>
  46
  47 struct ctl_table;
  48 struct file;
  49 struct inet6_dev;
  50 struct net_device;
  51 struct net_proto_family;
  52 struct sk_buff;
  53
  54 extern struct neigh_table nd_tbl;
  55
  56 struct nd_msg {
  57         struct icmp6hdr icmph;
  58         struct in6_addr target;
  59         __u8            opt[0];
  60 };
  61
  62 struct rs_msg {
  63         struct icmp6hdr icmph;
  64         __u8            opt[0];
  65 };
  66
  67 struct ra_msg {
  68         struct icmp6hdr         icmph;
  69         __u32                   reachable_time;
  70         __u32                   retrans_timer;
  71 };
  72
  73 struct nd_opt_hdr {
  74         __u8            nd_opt_type;
  75         __u8            nd_opt_len;
  76 } __attribute__((__packed__));
  77
  78
  79 extern int                      ndisc_init(struct net_proto_family *ops);
  80
  81 extern void                     ndisc_cleanup(void);
  82
  83 extern int                      ndisc_rcv(struct sk_buff *skb);
  84
  85 extern void                     ndisc_send_ns(struct net_device *dev,
  86                                               struct neighbour *neigh,
  87                                               struct in6_addr *solicit,
  88                                               struct in6_addr *daddr,
  89                                               struct in6_addr *saddr);
  90
  91 extern void                     ndisc_send_rs(struct net_device *dev,
  92                                               struct in6_addr *saddr,
  93                                               struct in6_addr *daddr);
  94
  95 extern void                     ndisc_forwarding_on(void);
  96 extern void                     ndisc_forwarding_off(void);
  97
  98 extern void                     ndisc_send_redirect(struct sk_buff *skb,
  99                                                     struct neighbour *neigh,
 100                                                     struct in6_addr *target);
 101
 102 extern int                      ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
 103
 104
 105 struct rt6_info *               dflt_rt_lookup(void);
 106
 107 /*
 108  *      IGMP
 109  */
 110 extern int                      igmp6_init(struct net_proto_family *ops);
 111
 112 extern void                     igmp6_cleanup(void);
 113
 114 extern int                      igmp6_event_query(struct sk_buff *skb);
 115
 116 extern int                      igmp6_event_report(struct sk_buff *skb);
 117
 118 extern void                     igmp6_cleanup(void);
 119
 120 #ifdef CONFIG_SYSCTL
 121 extern int                      ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
 122                                                            int write,
 123                                                            struct file * filp,
 124                                                            void __user *buffer,
 125                                                            size_t *lenp,
 126                                                            loff_t *ppos);
 127 #endif
 128
 129 extern void                     inet6_ifinfo_notify(int event,
 130                                                     struct inet6_dev *idev);
 131
 132 static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr)
 133 {
 134
 135         if (dev)
 136                 return __neigh_lookup(&nd_tbl, addr, dev, 1);
 137
 138         return NULL;
 139 }
 140
 141
 142 #endif /* __KERNEL__ */
 143
 144
 145 #endif