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