include/net/ip6_route.h

   1 #ifndef _NET_IP6_ROUTE_H
   2 #define _NET_IP6_ROUTE_H
   3
   4 #define IP6_RT_PRIO_USER        1024
   5 #define IP6_RT_PRIO_ADDRCONF    256
   6 #define IP6_RT_PRIO_KERN        512
   7
   8 struct route_info {
   9         __u8                    type;
  10         __u8                    length;
  11         __u8                    prefix_len;
  12 #if defined(__BIG_ENDIAN_BITFIELD)
  13         __u8                    reserved_h:3,
  14                                 route_pref:2,
  15                                 reserved_l:3;
  16 #elif defined(__LITTLE_ENDIAN_BITFIELD)
  17         __u8                    reserved_l:3,
  18                                 route_pref:2,
  19                                 reserved_h:3;
  20 #endif
  21         __be32                  lifetime;
  22         __u8                    prefix[0];      /* 0,8 or 16 */
  23 };
  24
  25 #ifdef __KERNEL__
  26
  27 #include <net/flow.h>
  28 #include <net/ip6_fib.h>
  29 #include <net/sock.h>
  30 #include <linux/ip.h>
  31 #include <linux/ipv6.h>
  32
  33 #define RT6_LOOKUP_F_IFACE              0x00000001
  34 #define RT6_LOOKUP_F_REACHABLE          0x00000002
  35 #define RT6_LOOKUP_F_HAS_SADDR          0x00000004
  36 #define RT6_LOOKUP_F_SRCPREF_TMP        0x00000008
  37 #define RT6_LOOKUP_F_SRCPREF_PUBLIC     0x00000010
  38 #define RT6_LOOKUP_F_SRCPREF_COA        0x00000020
  39
  40
  41 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
  42 extern struct rt6_info  *ip6_prohibit_entry;
  43 extern struct rt6_info  *ip6_blk_hole_entry;
  44 #endif
  45
  46 extern void                     ip6_route_input(struct sk_buff *skb);
  47
  48 extern struct dst_entry *       ip6_route_output(struct net *net,
  49                                                  struct sock *sk,
  50                                                  struct flowi *fl);
  51
  52 extern int                      ip6_route_init(void);
  53 extern void                     ip6_route_cleanup(void);
  54
  55 extern int                      ipv6_route_ioctl(struct net *net,
  56                                                  unsigned int cmd,
  57                                                  void __user *arg);
  58
  59 extern int                      ip6_route_add(struct fib6_config *cfg);
  60 extern int                      ip6_ins_rt(struct rt6_info *);
  61 extern int                      ip6_del_rt(struct rt6_info *);
  62
  63 extern struct rt6_info          *rt6_lookup(struct net *net,
  64                                             const struct in6_addr *daddr,
  65                                             const struct in6_addr *saddr,
  66                                             int oif, int flags);
  67
  68 extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
  69                                          struct neighbour *neigh,
  70                                          const struct in6_addr *addr);
  71 extern int icmp6_dst_gc(int *more);
  72
  73 extern void fib6_force_start_gc(struct net *net);
  74
  75 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
  76                                            const struct in6_addr *addr,
  77                                            int anycast);
  78
  79 extern int                      ip6_dst_hoplimit(struct dst_entry *dst);
  80
  81 /*
  82  *      support functions for ND
  83  *
  84  */
  85 extern struct rt6_info *        rt6_get_dflt_router(struct in6_addr *addr,
  86                                                     struct net_device *dev);
  87 extern struct rt6_info *        rt6_add_dflt_router(struct in6_addr *gwaddr,
  88                                                     struct net_device *dev,
  89                                                     unsigned int pref);
  90
  91 extern void                     rt6_purge_dflt_routers(struct net *net);
  92
  93 extern int                      rt6_route_rcv(struct net_device *dev,
  94                                               u8 *opt, int len,
  95                                               struct in6_addr *gwaddr);
  96
  97 extern void                     rt6_redirect(struct in6_addr *dest,
  98                                              struct in6_addr *src,
  99                                              struct in6_addr *saddr,
 100                                              struct neighbour *neigh,
 101                                              u8 *lladdr,
 102                                              int on_link);
 103
 104 extern void                     rt6_pmtu_discovery(struct in6_addr *daddr,
 105                                                    struct in6_addr *saddr,
 106                                                    struct net_device *dev,
 107                                                    u32 pmtu);
 108
 109 struct netlink_callback;
 110
 111 struct rt6_rtnl_dump_arg
 112 {
 113         struct sk_buff *skb;
 114         struct netlink_callback *cb;
 115 };
 116
 117 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
 118 extern void rt6_ifdown(struct net *net, struct net_device *dev);
 119 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
 120
 121 extern rwlock_t rt6_lock;
 122
 123 /*
 124  *      Store a destination cache entry in a socket
 125  */
 126 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
 127                                    struct in6_addr *daddr, struct in6_addr *saddr)
 128 {
 129         struct ipv6_pinfo *np = inet6_sk(sk);
 130         struct rt6_info *rt = (struct rt6_info *) dst;
 131
 132         sk_setup_caps(sk, dst);
 133         np->daddr_cache = daddr;
 134 #ifdef CONFIG_IPV6_SUBTREES
 135         np->saddr_cache = saddr;
 136 #endif
 137         np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
 138 }
 139
 140 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
 141                                  struct in6_addr *daddr, struct in6_addr *saddr)
 142 {
 143         write_lock(&sk->sk_dst_lock);
 144         __ip6_dst_store(sk, dst, daddr, saddr);
 145         write_unlock(&sk->sk_dst_lock);
 146 }
 147
 148 static inline int ipv6_unicast_destination(struct sk_buff *skb)
 149 {
 150         struct rt6_info *rt = (struct rt6_info *) skb->dst;
 151
 152         return rt->rt6i_flags & RTF_LOCAL;
 153 }
 154
 155 #endif
 156 #endif