[IPV6]: ROUTE: Add experimental support for Route Information Option in RA (RFC4191).
[linux-2.6.git] / 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 extern int ip6_rt_gc_interval;
45
46 extern void                     ip6_route_input(struct sk_buff *skb);
47
48 extern struct dst_entry *       ip6_route_output(struct sock *sk,
49                                                  struct flowi *fl);
50
51 extern int                      ip6_route_me_harder(struct sk_buff *skb);
52
53 extern void                     ip6_route_init(void);
54 extern void                     ip6_route_cleanup(void);
55
56 extern int                      ipv6_route_ioctl(unsigned int cmd, void __user *arg);
57
58 extern int                      ip6_route_add(struct in6_rtmsg *rtmsg,
59                                               struct nlmsghdr *,
60                                               void *rtattr,
61                                               struct netlink_skb_parms *req);
62 extern int                      ip6_ins_rt(struct rt6_info *,
63                                            struct nlmsghdr *,
64                                            void *rtattr,
65                                            struct netlink_skb_parms *req);
66 extern int                      ip6_del_rt(struct rt6_info *,
67                                            struct nlmsghdr *,
68                                            void *rtattr,
69                                            struct netlink_skb_parms *req);
70
71 extern int                      ip6_rt_addr_add(struct in6_addr *addr,
72                                                 struct net_device *dev,
73                                                 int anycast);
74
75 extern int                      ip6_rt_addr_del(struct in6_addr *addr,
76                                                 struct net_device *dev);
77
78 extern void                     rt6_sndmsg(int type, struct in6_addr *dst,
79                                            struct in6_addr *src,
80                                            struct in6_addr *gw,
81                                            struct net_device *dev, 
82                                            int dstlen, int srclen,
83                                            int metric, __u32 flags);
84
85 extern struct rt6_info          *rt6_lookup(struct in6_addr *daddr,
86                                             struct in6_addr *saddr,
87                                             int oif, int flags);
88
89 extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
90                                          struct neighbour *neigh,
91                                          struct in6_addr *addr,
92                                          int (*output)(struct sk_buff *));
93 extern int ndisc_dst_gc(int *more);
94 extern void fib6_force_start_gc(void);
95
96 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
97                                            const struct in6_addr *addr,
98                                            int anycast);
99
100 /*
101  *      support functions for ND
102  *
103  */
104 extern struct rt6_info *        rt6_get_dflt_router(struct in6_addr *addr,
105                                                     struct net_device *dev);
106 extern struct rt6_info *        rt6_add_dflt_router(struct in6_addr *gwaddr,
107                                                     struct net_device *dev,
108                                                     unsigned int pref);
109
110 extern void                     rt6_purge_dflt_routers(void);
111
112 extern int                      rt6_route_rcv(struct net_device *dev,
113                                               u8 *opt, int len,
114                                               struct in6_addr *gwaddr);
115
116 extern void                     rt6_redirect(struct in6_addr *dest,
117                                              struct in6_addr *saddr,
118                                              struct neighbour *neigh,
119                                              u8 *lladdr,
120                                              int on_link);
121
122 extern void                     rt6_pmtu_discovery(struct in6_addr *daddr,
123                                                    struct in6_addr *saddr,
124                                                    struct net_device *dev,
125                                                    u32 pmtu);
126
127 struct nlmsghdr;
128 struct netlink_callback;
129 extern int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb);
130 extern int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
131 extern int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
132 extern int inet6_rtm_getroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
133
134 extern void rt6_ifdown(struct net_device *dev);
135 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
136
137 extern rwlock_t rt6_lock;
138
139 /*
140  *      Store a destination cache entry in a socket
141  */
142 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
143                                      struct in6_addr *daddr)
144 {
145         struct ipv6_pinfo *np = inet6_sk(sk);
146         struct rt6_info *rt = (struct rt6_info *) dst;
147
148         write_lock(&sk->sk_dst_lock);
149         __sk_dst_set(sk, dst);
150         np->daddr_cache = daddr;
151         np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
152         write_unlock(&sk->sk_dst_lock);
153 }
154
155 static inline int ipv6_unicast_destination(struct sk_buff *skb)
156 {
157         struct rt6_info *rt = (struct rt6_info *) skb->dst;
158
159         return rt->rt6i_flags & RTF_LOCAL;
160 }
161
162 #endif
163 #endif