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
  74 extern int                      ip6_rt_addr_add(struct in6_addr *addr,
  75                                                 struct net_device *dev,
  76                                                 int anycast);
  77
  78 extern int                      ip6_rt_addr_del(struct in6_addr *addr,
  79                                                 struct net_device *dev);
  80
  81 extern void                     rt6_sndmsg(int type, struct in6_addr *dst,
  82                                            struct in6_addr *src,
  83                                            struct in6_addr *gw,
  84                                            struct net_device *dev,
  85                                            int dstlen, int srclen,
  86                                            int metric, __u32 flags);
  87
  88 extern struct rt6_info          *rt6_lookup(struct in6_addr *daddr,
  89                                             struct in6_addr *saddr,
  90                                             int oif, int flags);
  91
  92 extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
  93                                          struct neighbour *neigh,
  94                                          struct in6_addr *addr,
  95                                          int (*output)(struct sk_buff *));
  96 extern int ndisc_dst_gc(int *more);
  97 extern void fib6_force_start_gc(void);
  98
  99 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
 100                                            const struct in6_addr *addr,
 101                                            int anycast);
 102
 103 /*
 104  *      support functions for ND
 105  *
 106  */
 107 extern struct rt6_info *        rt6_get_dflt_router(struct in6_addr *addr,
 108                                                     struct net_device *dev);
 109 extern struct rt6_info *        rt6_add_dflt_router(struct in6_addr *gwaddr,
 110                                                     struct net_device *dev,
 111                                                     unsigned int pref);
 112
 113 extern void                     rt6_purge_dflt_routers(void);
 114
 115 extern int                      rt6_route_rcv(struct net_device *dev,
 116                                               u8 *opt, int len,
 117                                               struct in6_addr *gwaddr);
 118
 119 extern void                     rt6_redirect(struct in6_addr *dest,
 120                                              struct in6_addr *saddr,
 121                                              struct neighbour *neigh,
 122                                              u8 *lladdr,
 123                                              int on_link);
 124
 125 extern void                     rt6_pmtu_discovery(struct in6_addr *daddr,
 126                                                    struct in6_addr *saddr,
 127                                                    struct net_device *dev,
 128                                                    u32 pmtu);
 129
 130 struct nlmsghdr;
 131 struct netlink_callback;
 132 extern int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb);
 133 extern int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
 134 extern int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
 135 extern int inet6_rtm_getroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
 136
 137 struct rt6_rtnl_dump_arg
 138 {
 139         struct sk_buff *skb;
 140         struct netlink_callback *cb;
 141 };
 142
 143 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
 144 extern void rt6_ifdown(struct net_device *dev);
 145 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
 146
 147 extern rwlock_t rt6_lock;
 148
 149 /*
 150  *      Store a destination cache entry in a socket
 151  */
 152 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
 153                                    struct in6_addr *daddr)
 154 {
 155         struct ipv6_pinfo *np = inet6_sk(sk);
 156         struct rt6_info *rt = (struct rt6_info *) dst;
 157
 158         sk_setup_caps(sk, dst);
 159         np->daddr_cache = daddr;
 160         np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
 161 }
 162
 163 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
 164                                  struct in6_addr *daddr)
 165 {
 166         write_lock(&sk->sk_dst_lock);
 167         __ip6_dst_store(sk, dst, daddr);
 168         write_unlock(&sk->sk_dst_lock);
 169 }
 170
 171 static inline int ipv6_unicast_destination(struct sk_buff *skb)
 172 {
 173         struct rt6_info *rt = (struct rt6_info *) skb->dst;
 174
 175         return rt->rt6i_flags & RTF_LOCAL;
 176 }
 177
 178 #endif
 179 #endif