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_RDNSS = 25,              /* RFC5006 */
  28         __ND_OPT_MAX
  29 };
  30
  31 #define MAX_RTR_SOLICITATION_DELAY      HZ
  32
  33 #define ND_REACHABLE_TIME               (30*HZ)
  34 #define ND_RETRANS_TIMER                HZ
  35
  36 #define ND_MIN_RANDOM_FACTOR            (1/2)
  37 #define ND_MAX_RANDOM_FACTOR            (3/2)
  38
  39 #ifdef __KERNEL__
  40
  41 #include <linux/compiler.h>
  42 #include <linux/icmpv6.h>
  43 #include <linux/in6.h>
  44 #include <linux/types.h>
  45
  46 #include <net/neighbour.h>
  47
  48 struct ctl_table;
  49 struct file;
  50 struct inet6_dev;
  51 struct net_device;
  52 struct net_proto_family;
  53 struct sk_buff;
  54
  55 extern struct neigh_table nd_tbl;
  56
  57 struct nd_msg {
  58         struct icmp6hdr icmph;
  59         struct in6_addr target;
  60         __u8            opt[0];
  61 };
  62
  63 struct rs_msg {
  64         struct icmp6hdr icmph;
  65         __u8            opt[0];
  66 };
  67
  68 struct ra_msg {
  69         struct icmp6hdr         icmph;
  70         __be32                  reachable_time;
  71         __be32                  retrans_timer;
  72 };
  73
  74 struct nd_opt_hdr {
  75         __u8            nd_opt_type;
  76         __u8            nd_opt_len;
  77 } __attribute__((__packed__));
  78
  79
  80 extern int                      ndisc_init(struct net_proto_family *ops);
  81
  82 extern void                     ndisc_cleanup(void);
  83
  84 extern int                      ndisc_rcv(struct sk_buff *skb);
  85
  86 extern void                     ndisc_send_ns(struct net_device *dev,
  87                                               struct neighbour *neigh,
  88                                               struct in6_addr *solicit,
  89                                               struct in6_addr *daddr,
  90                                               struct in6_addr *saddr);
  91
  92 extern void                     ndisc_send_rs(struct net_device *dev,
  93                                               struct in6_addr *saddr,
  94                                               struct in6_addr *daddr);
  95
  96 extern void                     ndisc_forwarding_on(void);
  97 extern void                     ndisc_forwarding_off(void);
  98
  99 extern void                     ndisc_send_redirect(struct sk_buff *skb,
 100                                                     struct neighbour *neigh,
 101                                                     struct in6_addr *target);
 102
 103 extern int                      ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
 104
 105
 106 struct rt6_info *               dflt_rt_lookup(void);
 107
 108 /*
 109  *      IGMP
 110  */
 111 extern int                      igmp6_init(struct net_proto_family *ops);
 112
 113 extern void                     igmp6_cleanup(void);
 114
 115 extern int                      igmp6_event_query(struct sk_buff *skb);
 116
 117 extern int                      igmp6_event_report(struct sk_buff *skb);
 118
 119 extern void                     igmp6_cleanup(void);
 120
 121 #ifdef CONFIG_SYSCTL
 122 extern int                      ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
 123                                                            int write,
 124                                                            struct file * filp,
 125                                                            void __user *buffer,
 126                                                            size_t *lenp,
 127                                                            loff_t *ppos);
 128 #endif
 129
 130 extern void                     inet6_ifinfo_notify(int event,
 131                                                     struct inet6_dev *idev);
 132
 133 static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr)
 134 {
 135
 136         if (dev)
 137                 return __neigh_lookup(&nd_tbl, addr, dev, 1);
 138
 139         return NULL;
 140 }
 141
 142
 143 #endif /* __KERNEL__ */
 144
 145
 146 #endif