LXR linux/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 * Router type: cross-layer information from link-layer to
  16 * IPv6 layer reported by certain link types (e.g., RFC4214).
  17 */
  18#define NDISC_NODETYPE_UNSPEC           0       /* unspecified (default) */
  19#define NDISC_NODETYPE_HOST             1       /* host or unauthorized router */
  20#define NDISC_NODETYPE_NODEFAULT        2       /* non-default router */
  21#define NDISC_NODETYPE_DEFAULT          3       /* default router */
  22
  23/*
  24 *      ndisc options
  25 */
  26
  27enum {
  28        __ND_OPT_PREFIX_INFO_END = 0,
  29        ND_OPT_SOURCE_LL_ADDR = 1,      /* RFC2461 */
  30        ND_OPT_TARGET_LL_ADDR = 2,      /* RFC2461 */
  31        ND_OPT_PREFIX_INFO = 3,         /* RFC2461 */
  32        ND_OPT_REDIRECT_HDR = 4,        /* RFC2461 */
  33        ND_OPT_MTU = 5,                 /* RFC2461 */
  34        __ND_OPT_ARRAY_MAX,
  35        ND_OPT_ROUTE_INFO = 24,         /* RFC4191 */
  36        ND_OPT_RDNSS = 25,              /* RFC5006 */
  37        __ND_OPT_MAX
  38};
  39
  40#define MAX_RTR_SOLICITATION_DELAY      HZ
  41
  42#define ND_REACHABLE_TIME               (30*HZ)
  43#define ND_RETRANS_TIMER                HZ
  44
  45#define ND_MIN_RANDOM_FACTOR            (1/2)
  46#define ND_MAX_RANDOM_FACTOR            (3/2)
  47
  48#ifdef __KERNEL__
  49
  50#include <linux/compiler.h>
  51#include <linux/icmpv6.h>
  52#include <linux/in6.h>
  53#include <linux/types.h>
  54
  55#include <net/neighbour.h>
  56
  57struct ctl_table;
  58struct inet6_dev;
  59struct net_device;
  60struct net_proto_family;
  61struct sk_buff;
  62
  63extern struct neigh_table nd_tbl;
  64
  65struct nd_msg {
  66        struct icmp6hdr icmph;
  67        struct in6_addr target;
  68        __u8            opt[0];
  69};
  70
  71struct rs_msg {
  72        struct icmp6hdr icmph;
  73        __u8            opt[0];
  74};
  75
  76struct ra_msg {
  77        struct icmp6hdr         icmph;
  78        __be32                  reachable_time;
  79        __be32                  retrans_timer;
  80};
  81
  82struct nd_opt_hdr {
  83        __u8            nd_opt_type;
  84        __u8            nd_opt_len;
  85} __attribute__((__packed__));
  86
  87
  88extern int                      ndisc_init(void);
  89
  90extern void                     ndisc_cleanup(void);
  91
  92extern int                      ndisc_rcv(struct sk_buff *skb);
  93
  94extern void                     ndisc_send_ns(struct net_device *dev,
  95                                              struct neighbour *neigh,
  96                                              const struct in6_addr *solicit,
  97                                              const struct in6_addr *daddr,
  98                                              const struct in6_addr *saddr);
  99
 100extern void                     ndisc_send_rs(struct net_device *dev,
 101                                              const struct in6_addr *saddr,
 102                                              const struct in6_addr *daddr);
 103
 104extern void                     ndisc_send_redirect(struct sk_buff *skb,
 105                                                    struct neighbour *neigh,
 106                                                    const struct in6_addr *target);
 107
 108extern int                      ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
 109
 110extern struct sk_buff           *ndisc_build_skb(struct net_device *dev,
 111                                                 const struct in6_addr *daddr,
 112                                                 const struct in6_addr *saddr,
 113                                                 struct icmp6hdr *icmp6h,
 114                                                 const struct in6_addr *target,
 115                                                 int llinfo);
 116
 117extern void                     ndisc_send_skb(struct sk_buff *skb,
 118                                               struct net_device *dev,
 119                                               struct neighbour *neigh,
 120                                               const struct in6_addr *daddr,
 121                                               const struct in6_addr *saddr,
 122                                               struct icmp6hdr *icmp6h);
 123
 124
 125
 126/*
 127 *      IGMP
 128 */
 129extern int                      igmp6_init(void);
 130
 131extern void                     igmp6_cleanup(void);
 132
 133extern int                      igmp6_event_query(struct sk_buff *skb);
 134
 135extern int                      igmp6_event_report(struct sk_buff *skb);
 136
 137
 138#ifdef CONFIG_SYSCTL
 139extern int                      ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
 140                                                           int write,
 141                                                           void __user *buffer,
 142                                                           size_t *lenp,
 143                                                           loff_t *ppos);
 144int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl,
 145                                 void __user *oldval, size_t __user *oldlenp,
 146                                 void __user *newval, size_t newlen);
 147#endif
 148
 149extern void                     inet6_ifinfo_notify(int event,
 150                                                    struct inet6_dev *idev);
 151
 152static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, const struct in6_addr *addr)
 153{
 154
 155        if (dev)
 156                return __neigh_lookup_errno(&nd_tbl, addr, dev);
 157
 158        return ERR_PTR(-ENODEV);
 159}
 160
 161
 162#endif /* __KERNEL__ */
 163
 164
 165#endif
 166