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         __u32                   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 struct pol_chain {
  36         int                     type;
  37         int                     priority;
  38         struct fib6_node        *rules;
  39         struct pol_chain        *next;
  40 };
  41
  42 extern struct rt6_info  ip6_null_entry;
  43
  44 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
  45 extern struct rt6_info  ip6_prohibit_entry;
  46 extern struct rt6_info  ip6_blk_hole_entry;
  47 #endif
  48
  49 extern int ip6_rt_gc_interval;
  50
  51 extern void                     ip6_route_input(struct sk_buff *skb);
  52
  53 extern struct dst_entry *       ip6_route_output(struct sock *sk,
  54                                                  struct flowi *fl);
  55
  56 extern int                      ip6_route_me_harder(struct sk_buff *skb);
  57
  58 extern void                     ip6_route_init(void);
  59 extern void                     ip6_route_cleanup(void);
  60
  61 extern int                      ipv6_route_ioctl(unsigned int cmd, void __user *arg);
  62
  63 extern int                      ip6_route_add(struct in6_rtmsg *rtmsg,
  64                                               struct nlmsghdr *,
  65                                               void *rtattr,
  66                                               struct netlink_skb_parms *req,
  67                                               u32 table_id);
  68 extern int                      ip6_ins_rt(struct rt6_info *,
  69                                            struct nlmsghdr *,
  70                                            void *rtattr,
  71                                            struct netlink_skb_parms *req);
  72 extern int                      ip6_del_rt(struct rt6_info *,
  73                                            struct nlmsghdr *,
  74                                            void *rtattr,
  75                                            struct netlink_skb_parms *req);
  76
  77 extern int                      ip6_rt_addr_add(struct in6_addr *addr,
  78                                                 struct net_device *dev,
  79                                                 int anycast);
  80
  81 extern int                      ip6_rt_addr_del(struct in6_addr *addr,
  82                                                 struct net_device *dev);
  83
  84 extern void                     rt6_sndmsg(int type, struct in6_addr *dst,
  85                                            struct in6_addr *src,
  86                                            struct in6_addr *gw,
  87                                            struct net_device *dev,
  88                                            int dstlen, int srclen,
  89                                            int metric, __u32 flags);
  90
  91 extern struct rt6_info          *rt6_lookup(struct in6_addr *daddr,
  92                                             struct in6_addr *saddr,
  93                                             int oif, int flags);
  94
  95 extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
  96                                          struct neighbour *neigh,
  97                                          struct in6_addr *addr,
  98                                          int (*output)(struct sk_buff *));
  99 extern int ndisc_dst_gc(int *more);
 100 extern void fib6_force_start_gc(void);
 101
 102 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
 103                                            const struct in6_addr *addr,
 104                                            int anycast);
 105
 106 /*
 107  *      support functions for ND
 108  *
 109  */
 110 extern struct rt6_info *        rt6_get_dflt_router(struct in6_addr *addr,
 111                                                     struct net_device *dev);
 112 extern struct rt6_info *        rt6_add_dflt_router(struct in6_addr *gwaddr,
 113                                                     struct net_device *dev,
 114                                                     unsigned int pref);
 115
 116 extern void                     rt6_purge_dflt_routers(void);
 117
 118 extern int                      rt6_route_rcv(struct net_device *dev,
 119                                               u8 *opt, int len,
 120                                               struct in6_addr *gwaddr);
 121
 122 extern void                     rt6_redirect(struct in6_addr *dest,
 123                                              struct in6_addr *saddr,
 124                                              struct neighbour *neigh,
 125                                              u8 *lladdr,
 126                                              int on_link);
 127
 128 extern void                     rt6_pmtu_discovery(struct in6_addr *daddr,
 129                                                    struct in6_addr *saddr,
 130                                                    struct net_device *dev,
 131                                                    u32 pmtu);
 132
 133 struct nlmsghdr;
 134 struct netlink_callback;
 135 extern int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb);
 136 extern int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
 137 extern int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
 138 extern int inet6_rtm_getroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
 139
 140 extern void rt6_ifdown(struct net_device *dev);
 141 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
 142
 143 extern rwlock_t rt6_lock;
 144
 145 /*
 146  *      Store a destination cache entry in a socket
 147  */
 148 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
 149                                    struct in6_addr *daddr)
 150 {
 151         struct ipv6_pinfo *np = inet6_sk(sk);
 152         struct rt6_info *rt = (struct rt6_info *) dst;
 153
 154         sk_setup_caps(sk, dst);
 155         np->daddr_cache = daddr;
 156         np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
 157 }
 158
 159 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
 160                                  struct in6_addr *daddr)
 161 {
 162         write_lock(&sk->sk_dst_lock);
 163         __ip6_dst_store(sk, dst, daddr);
 164         write_unlock(&sk->sk_dst_lock);
 165 }
 166
 167 static inline int ipv6_unicast_destination(struct sk_buff *skb)
 168 {
 169         struct rt6_info *rt = (struct rt6_info *) skb->dst;
 170
 171         return rt->rt6i_flags & RTF_LOCAL;
 172 }
 173
 174 #endif
 175 #endif