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[linux-2.6] / 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
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 net *net,
49                                                  struct sock *sk,
50                                                  struct flowi *fl);
51
52 extern int                      ip6_route_init(void);
53 extern void                     ip6_route_cleanup(void);
54
55 extern int                      ipv6_route_ioctl(struct net *net,
56                                                  unsigned int cmd,
57                                                  void __user *arg);
58
59 extern int                      ip6_route_add(struct fib6_config *cfg);
60 extern int                      ip6_ins_rt(struct rt6_info *);
61 extern int                      ip6_del_rt(struct rt6_info *);
62
63 extern struct rt6_info          *rt6_lookup(struct net *net,
64                                             const struct in6_addr *daddr,
65                                             const struct in6_addr *saddr,
66                                             int oif, int flags);
67
68 extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
69                                          struct neighbour *neigh,
70                                          const struct in6_addr *addr);
71 extern int icmp6_dst_gc(void);
72
73 extern void fib6_force_start_gc(struct net *net);
74
75 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
76                                            const struct in6_addr *addr,
77                                            int anycast);
78
79 extern int                      ip6_dst_hoplimit(struct dst_entry *dst);
80
81 /*
82  *      support functions for ND
83  *
84  */
85 extern struct rt6_info *        rt6_get_dflt_router(struct in6_addr *addr,
86                                                     struct net_device *dev);
87 extern struct rt6_info *        rt6_add_dflt_router(struct in6_addr *gwaddr,
88                                                     struct net_device *dev,
89                                                     unsigned int pref);
90
91 extern void                     rt6_purge_dflt_routers(struct net *net);
92
93 extern int                      rt6_route_rcv(struct net_device *dev,
94                                               u8 *opt, int len,
95                                               struct in6_addr *gwaddr);
96
97 extern void                     rt6_redirect(struct in6_addr *dest,
98                                              struct in6_addr *src,
99                                              struct in6_addr *saddr,
100                                              struct neighbour *neigh,
101                                              u8 *lladdr,
102                                              int on_link);
103
104 extern void                     rt6_pmtu_discovery(struct in6_addr *daddr,
105                                                    struct in6_addr *saddr,
106                                                    struct net_device *dev,
107                                                    u32 pmtu);
108
109 struct netlink_callback;
110
111 struct rt6_rtnl_dump_arg
112 {
113         struct sk_buff *skb;
114         struct netlink_callback *cb;
115 };
116
117 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
118 extern void rt6_ifdown(struct net *net, struct net_device *dev);
119 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
120
121 extern rwlock_t rt6_lock;
122
123 /*
124  *      Store a destination cache entry in a socket
125  */
126 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
127                                    struct in6_addr *daddr, struct in6_addr *saddr)
128 {
129         struct ipv6_pinfo *np = inet6_sk(sk);
130         struct rt6_info *rt = (struct rt6_info *) dst;
131
132         sk_setup_caps(sk, dst);
133         np->daddr_cache = daddr;
134 #ifdef CONFIG_IPV6_SUBTREES
135         np->saddr_cache = saddr;
136 #endif
137         np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
138 }
139
140 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
141                                  struct in6_addr *daddr, struct in6_addr *saddr)
142 {
143         write_lock(&sk->sk_dst_lock);
144         __ip6_dst_store(sk, dst, daddr, saddr);
145         write_unlock(&sk->sk_dst_lock);
146 }
147
148 static inline int ipv6_unicast_destination(struct sk_buff *skb)
149 {
150         struct rt6_info *rt = (struct rt6_info *) skb->dst;
151
152         return rt->rt6i_flags & RTF_LOCAL;
153 }
154
155 #endif
156 #endif