SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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              0x00000001
  34 #define RT6_LOOKUP_F_REACHABLE          0x00000002
  35 #define RT6_LOOKUP_F_HAS_SADDR          0x00000004
  36 #define RT6_LOOKUP_F_SRCPREF_TMP        0x00000008
  37 #define RT6_LOOKUP_F_SRCPREF_PUBLIC     0x00000010
  38 #define RT6_LOOKUP_F_SRCPREF_COA        0x00000020
  39
  40 extern struct rt6_info  *ip6_null_entry;
  41
  42 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
  43 extern struct rt6_info  *ip6_prohibit_entry;
  44 extern struct rt6_info  *ip6_blk_hole_entry;
  45 #endif
  46
  47 extern void                     ip6_route_input(struct sk_buff *skb);
  48
  49 extern struct dst_entry *       ip6_route_output(struct net *net,
  50                                                  struct sock *sk,
  51                                                  struct flowi *fl);
  52
  53 extern int                      ip6_route_init(void);
  54 extern void                     ip6_route_cleanup(void);
  55
  56 extern int                      ipv6_route_ioctl(struct net *net,
  57                                                  unsigned int cmd,
  58                                                  void __user *arg);
  59
  60 extern int                      ip6_route_add(struct fib6_config *cfg);
  61 extern int                      ip6_ins_rt(struct rt6_info *);
  62 extern int                      ip6_del_rt(struct rt6_info *);
  63
  64 extern int                      ip6_rt_addr_add(struct in6_addr *addr,
  65                                                 struct net_device *dev,
  66                                                 int anycast);
  67
  68 extern int                      ip6_rt_addr_del(struct in6_addr *addr,
  69                                                 struct net_device *dev);
  70
  71 extern void                     rt6_sndmsg(int type, struct in6_addr *dst,
  72                                            struct in6_addr *src,
  73                                            struct in6_addr *gw,
  74                                            struct net_device *dev,
  75                                            int dstlen, int srclen,
  76                                            int metric, __u32 flags);
  77
  78 extern struct rt6_info          *rt6_lookup(struct net *net,
  79                                             struct in6_addr *daddr,
  80                                             struct in6_addr *saddr,
  81                                             int oif, int flags);
  82
  83 extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
  84                                          struct neighbour *neigh,
  85                                          struct in6_addr *addr);
  86 extern int icmp6_dst_gc(int *more);
  87
  88 extern void fib6_force_start_gc(struct net *net);
  89
  90 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
  91                                            const struct in6_addr *addr,
  92                                            int anycast);
  93
  94 extern int                      ip6_dst_hoplimit(struct dst_entry *dst);
  95
  96 /*
  97  *      support functions for ND
  98  *
  99  */
 100 extern struct rt6_info *        rt6_get_dflt_router(struct in6_addr *addr,
 101                                                     struct net_device *dev);
 102 extern struct rt6_info *        rt6_add_dflt_router(struct in6_addr *gwaddr,
 103                                                     struct net_device *dev,
 104                                                     unsigned int pref);
 105
 106 extern void                     rt6_purge_dflt_routers(struct net *net);
 107
 108 extern int                      rt6_route_rcv(struct net_device *dev,
 109                                               u8 *opt, int len,
 110                                               struct in6_addr *gwaddr);
 111
 112 extern void                     rt6_redirect(struct in6_addr *dest,
 113                                              struct in6_addr *src,
 114                                              struct in6_addr *saddr,
 115                                              struct neighbour *neigh,
 116                                              u8 *lladdr,
 117                                              int on_link);
 118
 119 extern void                     rt6_pmtu_discovery(struct in6_addr *daddr,
 120                                                    struct in6_addr *saddr,
 121                                                    struct net_device *dev,
 122                                                    u32 pmtu);
 123
 124 struct netlink_callback;
 125
 126 struct rt6_rtnl_dump_arg
 127 {
 128         struct sk_buff *skb;
 129         struct netlink_callback *cb;
 130 };
 131
 132 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
 133 extern void rt6_ifdown(struct net *net, struct net_device *dev);
 134 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
 135
 136 extern rwlock_t rt6_lock;
 137
 138 /*
 139  *      Store a destination cache entry in a socket
 140  */
 141 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
 142                                    struct in6_addr *daddr, struct in6_addr *saddr)
 143 {
 144         struct ipv6_pinfo *np = inet6_sk(sk);
 145         struct rt6_info *rt = (struct rt6_info *) dst;
 146
 147         sk_setup_caps(sk, dst);
 148         np->daddr_cache = daddr;
 149 #ifdef CONFIG_IPV6_SUBTREES
 150         np->saddr_cache = saddr;
 151 #endif
 152         np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
 153 }
 154
 155 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
 156                                  struct in6_addr *daddr, struct in6_addr *saddr)
 157 {
 158         write_lock(&sk->sk_dst_lock);
 159         __ip6_dst_store(sk, dst, daddr, saddr);
 160         write_unlock(&sk->sk_dst_lock);
 161 }
 162
 163 static inline int ipv6_unicast_destination(struct sk_buff *skb)
 164 {
 165         struct rt6_info *rt = (struct rt6_info *) skb->dst;
 166
 167         return rt->rt6i_flags & RTF_LOCAL;
 168 }
 169
 170 #endif
 171 #endif