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      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(unsigned int cmd, 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 int                      ip6_rt_addr_add(struct in6_addr *addr,
  59                                                 struct net_device *dev,
  60                                                 int anycast);
  61
  62 extern int                      ip6_rt_addr_del(struct in6_addr *addr,
  63                                                 struct net_device *dev);
  64
  65 extern void                     rt6_sndmsg(int type, struct in6_addr *dst,
  66                                            struct in6_addr *src,
  67                                            struct in6_addr *gw,
  68                                            struct net_device *dev,
  69                                            int dstlen, int srclen,
  70                                            int metric, __u32 flags);
  71
  72 extern struct rt6_info          *rt6_lookup(struct in6_addr *daddr,
  73                                             struct in6_addr *saddr,
  74                                             int oif, int flags);
  75
  76 extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
  77                                          struct neighbour *neigh,
  78                                          struct in6_addr *addr,
  79                                          int (*output)(struct sk_buff *));
  80 extern int ndisc_dst_gc(int *more);
  81 extern void fib6_force_start_gc(void);
  82
  83 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
  84                                            const struct in6_addr *addr,
  85                                            int anycast);
  86
  87 /*
  88  *      support functions for ND
  89  *
  90  */
  91 extern struct rt6_info *        rt6_get_dflt_router(struct in6_addr *addr,
  92                                                     struct net_device *dev);
  93 extern struct rt6_info *        rt6_add_dflt_router(struct in6_addr *gwaddr,
  94                                                     struct net_device *dev,
  95                                                     unsigned int pref);
  96
  97 extern void                     rt6_purge_dflt_routers(void);
  98
  99 extern int                      rt6_route_rcv(struct net_device *dev,
 100                                               u8 *opt, int len,
 101                                               struct in6_addr *gwaddr);
 102
 103 extern void                     rt6_redirect(struct in6_addr *dest,
 104                                              struct in6_addr *src,
 105                                              struct in6_addr *saddr,
 106                                              struct neighbour *neigh,
 107                                              u8 *lladdr,
 108                                              int on_link);
 109
 110 extern void                     rt6_pmtu_discovery(struct in6_addr *daddr,
 111                                                    struct in6_addr *saddr,
 112                                                    struct net_device *dev,
 113                                                    u32 pmtu);
 114
 115 struct netlink_callback;
 116
 117 struct rt6_rtnl_dump_arg
 118 {
 119         struct sk_buff *skb;
 120         struct netlink_callback *cb;
 121 };
 122
 123 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
 124 extern void rt6_ifdown(struct net_device *dev);
 125 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
 126
 127 extern rwlock_t rt6_lock;
 128
 129 /*
 130  *      Store a destination cache entry in a socket
 131  */
 132 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
 133                                    struct in6_addr *daddr, struct in6_addr *saddr)
 134 {
 135         struct ipv6_pinfo *np = inet6_sk(sk);
 136         struct rt6_info *rt = (struct rt6_info *) dst;
 137
 138         sk_setup_caps(sk, dst);
 139         np->daddr_cache = daddr;
 140 #ifdef CONFIG_IPV6_SUBTREES
 141         np->saddr_cache = saddr;
 142 #endif
 143         np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
 144 }
 145
 146 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
 147                                  struct in6_addr *daddr, struct in6_addr *saddr)
 148 {
 149         write_lock(&sk->sk_dst_lock);
 150         __ip6_dst_store(sk, dst, daddr, saddr);
 151         write_unlock(&sk->sk_dst_lock);
 152 }
 153
 154 static inline int ipv6_unicast_destination(struct sk_buff *skb)
 155 {
 156         struct rt6_info *rt = (struct rt6_info *) skb->dst;
 157
 158         return rt->rt6i_flags & RTF_LOCAL;
 159 }
 160
 161 #endif
 162 #endif