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 extern void                     ip6_route_input(struct sk_buff *skb);
  42
  43 extern struct dst_entry *       ip6_route_output(struct net *net,
  44                                                  struct sock *sk,
  45                                                  struct flowi *fl);
  46
  47 extern int                      ip6_route_init(void);
  48 extern void                     ip6_route_cleanup(void);
  49
  50 extern int                      ipv6_route_ioctl(struct net *net,
  51                                                  unsigned int cmd,
  52                                                  void __user *arg);
  53
  54 extern int                      ip6_route_add(struct fib6_config *cfg);
  55 extern int                      ip6_ins_rt(struct rt6_info *);
  56 extern int                      ip6_del_rt(struct rt6_info *);
  57
  58 extern struct rt6_info          *rt6_lookup(struct net *net,
  59                                             const struct in6_addr *daddr,
  60                                             const struct in6_addr *saddr,
  61                                             int oif, int flags);
  62
  63 extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
  64                                          struct neighbour *neigh,
  65                                          const struct in6_addr *addr);
  66 extern int icmp6_dst_gc(void);
  67
  68 extern void fib6_force_start_gc(struct net *net);
  69
  70 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
  71                                            const struct in6_addr *addr,
  72                                            int anycast);
  73
  74 extern int                      ip6_dst_hoplimit(struct dst_entry *dst);
  75
  76 /*
  77  *      support functions for ND
  78  *
  79  */
  80 extern struct rt6_info *        rt6_get_dflt_router(struct in6_addr *addr,
  81                                                     struct net_device *dev);
  82 extern struct rt6_info *        rt6_add_dflt_router(struct in6_addr *gwaddr,
  83                                                     struct net_device *dev,
  84                                                     unsigned int pref);
  85
  86 extern void                     rt6_purge_dflt_routers(struct net *net);
  87
  88 extern int                      rt6_route_rcv(struct net_device *dev,
  89                                               u8 *opt, int len,
  90                                               struct in6_addr *gwaddr);
  91
  92 extern void                     rt6_redirect(struct in6_addr *dest,
  93                                              struct in6_addr *src,
  94                                              struct in6_addr *saddr,
  95                                              struct neighbour *neigh,
  96                                              u8 *lladdr,
  97                                              int on_link);
  98
  99 extern void                     rt6_pmtu_discovery(struct in6_addr *daddr,
 100                                                    struct in6_addr *saddr,
 101                                                    struct net_device *dev,
 102                                                    u32 pmtu);
 103
 104 struct netlink_callback;
 105
 106 struct rt6_rtnl_dump_arg {
 107         struct sk_buff *skb;
 108         struct netlink_callback *cb;
 109         struct net *net;
 110 };
 111
 112 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
 113 extern void rt6_ifdown(struct net *net, struct net_device *dev);
 114 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
 115
 116
 117 /*
 118  *      Store a destination cache entry in a socket
 119  */
 120 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
 121                                    struct in6_addr *daddr, struct in6_addr *saddr)
 122 {
 123         struct ipv6_pinfo *np = inet6_sk(sk);
 124         struct rt6_info *rt = (struct rt6_info *) dst;
 125
 126         sk_setup_caps(sk, dst);
 127         np->daddr_cache = daddr;
 128 #ifdef CONFIG_IPV6_SUBTREES
 129         np->saddr_cache = saddr;
 130 #endif
 131         np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
 132 }
 133
 134 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
 135                                  struct in6_addr *daddr, struct in6_addr *saddr)
 136 {
 137         write_lock(&sk->sk_dst_lock);
 138         __ip6_dst_store(sk, dst, daddr, saddr);
 139         write_unlock(&sk->sk_dst_lock);
 140 }
 141
 142 static inline int ipv6_unicast_destination(struct sk_buff *skb)
 143 {
 144         struct rt6_info *rt = (struct rt6_info *) skb_dst(skb);
 145
 146         return rt->rt6i_flags & RTF_LOCAL;
 147 }
 148
 149 #endif
 150 #endif