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   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      0x1
  34 #define RT6_LOOKUP_F_REACHABLE  0x2
  35 #define RT6_LOOKUP_F_HAS_SADDR  0x4
  36
  37 extern struct rt6_info  *ip6_null_entry;
  38
  39 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
  40 extern struct rt6_info  *ip6_prohibit_entry;
  41 extern struct rt6_info  *ip6_blk_hole_entry;
  42 #endif
  43
  44 extern void                     ip6_route_input(struct sk_buff *skb);
  45
  46 extern struct dst_entry *       ip6_route_output(struct sock *sk,
  47                                                  struct flowi *fl);
  48
  49 extern int                      ip6_route_init(void);
  50 extern void                     ip6_route_cleanup(void);
  51
  52 extern int                      ipv6_route_ioctl(struct net *net,
  53                                                  unsigned int cmd,
  54                                                  void __user *arg);
  55
  56 extern int                      ip6_route_add(struct fib6_config *cfg);
  57 extern int                      ip6_ins_rt(struct rt6_info *);
  58 extern int                      ip6_del_rt(struct rt6_info *);
  59
  60 extern int                      ip6_rt_addr_add(struct in6_addr *addr,
  61                                                 struct net_device *dev,
  62                                                 int anycast);
  63
  64 extern int                      ip6_rt_addr_del(struct in6_addr *addr,
  65                                                 struct net_device *dev);
  66
  67 extern void                     rt6_sndmsg(int type, struct in6_addr *dst,
  68                                            struct in6_addr *src,
  69                                            struct in6_addr *gw,
  70                                            struct net_device *dev,
  71                                            int dstlen, int srclen,
  72                                            int metric, __u32 flags);
  73
  74 extern struct rt6_info          *rt6_lookup(struct net *net,
  75                                             struct in6_addr *daddr,
  76                                             struct in6_addr *saddr,
  77                                             int oif, int flags);
  78
  79 extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
  80                                          struct neighbour *neigh,
  81                                          struct in6_addr *addr);
  82 extern int icmp6_dst_gc(int *more);
  83
  84 extern void fib6_force_start_gc(struct net *net);
  85
  86 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
  87                                            const struct in6_addr *addr,
  88                                            int anycast);
  89
  90 /*
  91  *      support functions for ND
  92  *
  93  */
  94 extern struct rt6_info *        rt6_get_dflt_router(struct in6_addr *addr,
  95                                                     struct net_device *dev);
  96 extern struct rt6_info *        rt6_add_dflt_router(struct in6_addr *gwaddr,
  97                                                     struct net_device *dev,
  98                                                     unsigned int pref);
  99
 100 extern void                     rt6_purge_dflt_routers(struct net *net);
 101
 102 extern int                      rt6_route_rcv(struct net_device *dev,
 103                                               u8 *opt, int len,
 104                                               struct in6_addr *gwaddr);
 105
 106 extern void                     rt6_redirect(struct in6_addr *dest,
 107                                              struct in6_addr *src,
 108                                              struct in6_addr *saddr,
 109                                              struct neighbour *neigh,
 110                                              u8 *lladdr,
 111                                              int on_link);
 112
 113 extern void                     rt6_pmtu_discovery(struct in6_addr *daddr,
 114                                                    struct in6_addr *saddr,
 115                                                    struct net_device *dev,
 116                                                    u32 pmtu);
 117
 118 struct netlink_callback;
 119
 120 struct rt6_rtnl_dump_arg
 121 {
 122         struct sk_buff *skb;
 123         struct netlink_callback *cb;
 124 };
 125
 126 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
 127 extern void rt6_ifdown(struct net *net, struct net_device *dev);
 128 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
 129
 130 extern rwlock_t rt6_lock;
 131
 132 /*
 133  *      Store a destination cache entry in a socket
 134  */
 135 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
 136                                    struct in6_addr *daddr, struct in6_addr *saddr)
 137 {
 138         struct ipv6_pinfo *np = inet6_sk(sk);
 139         struct rt6_info *rt = (struct rt6_info *) dst;
 140
 141         sk_setup_caps(sk, dst);
 142         np->daddr_cache = daddr;
 143 #ifdef CONFIG_IPV6_SUBTREES
 144         np->saddr_cache = saddr;
 145 #endif
 146         np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
 147 }
 148
 149 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
 150                                  struct in6_addr *daddr, struct in6_addr *saddr)
 151 {
 152         write_lock(&sk->sk_dst_lock);
 153         __ip6_dst_store(sk, dst, daddr, saddr);
 154         write_unlock(&sk->sk_dst_lock);
 155 }
 156
 157 static inline int ipv6_unicast_destination(struct sk_buff *skb)
 158 {
 159         struct rt6_info *rt = (struct rt6_info *) skb->dst;
 160
 161         return rt->rt6i_flags & RTF_LOCAL;
 162 }
 163
 164 #endif
 165 #endif