include/net/ip6_route.h

   1 #ifndef _NET_IP6_ROUTE_H
   2 #define _NET_IP6_ROUTE_H
   3
   4 #define IP6_RT_PRIO_FW          16
   5 #define IP6_RT_PRIO_USER        1024
   6 #define IP6_RT_PRIO_ADDRCONF    256
   7 #define IP6_RT_PRIO_KERN        512
   8 #define IP6_RT_FLOW_MASK        0x00ff
   9
  10 struct route_info {
  11         __u8                    type;
  12         __u8                    length;
  13         __u8                    prefix_len;
  14 #if defined(__BIG_ENDIAN_BITFIELD)
  15         __u8                    reserved_h:3,
  16                                 route_pref:2,
  17                                 reserved_l:3;
  18 #elif defined(__LITTLE_ENDIAN_BITFIELD)
  19         __u8                    reserved_l:3,
  20                                 route_pref:2,
  21                                 reserved_h:3;
  22 #endif
  23         __be32                  lifetime;
  24         __u8                    prefix[0];      /* 0,8 or 16 */
  25 };
  26
  27 #ifdef __KERNEL__
  28
  29 #include <net/flow.h>
  30 #include <net/ip6_fib.h>
  31 #include <net/sock.h>
  32 #include <linux/ip.h>
  33 #include <linux/ipv6.h>
  34
  35 #define RT6_LOOKUP_F_IFACE      0x1
  36 #define RT6_LOOKUP_F_REACHABLE  0x2
  37 #define RT6_LOOKUP_F_HAS_SADDR  0x4
  38
  39 extern struct rt6_info  ip6_null_entry;
  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 sock *sk,
  49                                                  struct flowi *fl);
  50
  51 extern int                      ip6_route_init(void);
  52 extern void                     ip6_route_cleanup(void);
  53
  54 extern int                      ipv6_route_ioctl(unsigned int cmd, 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 in6_addr *daddr,
  75                                             struct in6_addr *saddr,
  76                                             int oif, int flags);
  77
  78 extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
  79                                          struct neighbour *neigh,
  80                                          struct in6_addr *addr,
  81                                          int (*output)(struct sk_buff *));
  82 extern int ndisc_dst_gc(int *more);
  83 extern void fib6_force_start_gc(void);
  84
  85 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
  86                                            const struct in6_addr *addr,
  87                                            int anycast);
  88
  89 /*
  90  *      support functions for ND
  91  *
  92  */
  93 extern struct rt6_info *        rt6_get_dflt_router(struct in6_addr *addr,
  94                                                     struct net_device *dev);
  95 extern struct rt6_info *        rt6_add_dflt_router(struct in6_addr *gwaddr,
  96                                                     struct net_device *dev,
  97                                                     unsigned int pref);
  98
  99 extern void                     rt6_purge_dflt_routers(void);
 100
 101 extern int                      rt6_route_rcv(struct net_device *dev,
 102                                               u8 *opt, int len,
 103                                               struct in6_addr *gwaddr);
 104
 105 extern void                     rt6_redirect(struct in6_addr *dest,
 106                                              struct in6_addr *src,
 107                                              struct in6_addr *saddr,
 108                                              struct neighbour *neigh,
 109                                              u8 *lladdr,
 110                                              int on_link);
 111
 112 extern void                     rt6_pmtu_discovery(struct in6_addr *daddr,
 113                                                    struct in6_addr *saddr,
 114                                                    struct net_device *dev,
 115                                                    u32 pmtu);
 116
 117 struct netlink_callback;
 118
 119 struct rt6_rtnl_dump_arg
 120 {
 121         struct sk_buff *skb;
 122         struct netlink_callback *cb;
 123 };
 124
 125 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
 126 extern void rt6_ifdown(struct net_device *dev);
 127 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
 128
 129 extern rwlock_t rt6_lock;
 130
 131 /*
 132  *      Store a destination cache entry in a socket
 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         struct ipv6_pinfo *np = inet6_sk(sk);
 138         struct rt6_info *rt = (struct rt6_info *) dst;
 139
 140         sk_setup_caps(sk, dst);
 141         np->daddr_cache = daddr;
 142 #ifdef CONFIG_IPV6_SUBTREES
 143         np->saddr_cache = saddr;
 144 #endif
 145         np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
 146 }
 147
 148 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
 149                                  struct in6_addr *daddr, struct in6_addr *saddr)
 150 {
 151         write_lock(&sk->sk_dst_lock);
 152         __ip6_dst_store(sk, dst, daddr, saddr);
 153         write_unlock(&sk->sk_dst_lock);
 154 }
 155
 156 static inline int ipv6_unicast_destination(struct sk_buff *skb)
 157 {
 158         struct rt6_info *rt = (struct rt6_info *) skb->dst;
 159
 160         return rt->rt6i_flags & RTF_LOCAL;
 161 }
 162
 163 #endif
 164 #endif