[NETFILTER]: ip6table_mangle: reroute when nfmark changes in NF_IP6_LOCAL_OUT
[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 #define RT6_LOOKUP_F_IFACE      0x1
36 #define RT6_LOOKUP_F_REACHABLE  0x2
37 #define RT6_LOOKUP_F_HAS_SADDR  0x4
38
39 struct pol_chain {
40         int                     type;
41         int                     priority;
42         struct fib6_node        *rules;
43         struct pol_chain        *next;
44 };
45
46 extern struct rt6_info  ip6_null_entry;
47
48 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
49 extern struct rt6_info  ip6_prohibit_entry;
50 extern struct rt6_info  ip6_blk_hole_entry;
51 #endif
52
53 extern int ip6_rt_gc_interval;
54
55 extern void                     ip6_route_input(struct sk_buff *skb);
56
57 extern struct dst_entry *       ip6_route_output(struct sock *sk,
58                                                  struct flowi *fl);
59
60 extern void                     ip6_route_init(void);
61 extern void                     ip6_route_cleanup(void);
62
63 extern int                      ipv6_route_ioctl(unsigned int cmd, void __user *arg);
64
65 extern int                      ip6_route_add(struct fib6_config *cfg);
66 extern int                      ip6_ins_rt(struct rt6_info *);
67 extern int                      ip6_del_rt(struct rt6_info *);
68
69 extern int                      ip6_rt_addr_add(struct in6_addr *addr,
70                                                 struct net_device *dev,
71                                                 int anycast);
72
73 extern int                      ip6_rt_addr_del(struct in6_addr *addr,
74                                                 struct net_device *dev);
75
76 extern void                     rt6_sndmsg(int type, struct in6_addr *dst,
77                                            struct in6_addr *src,
78                                            struct in6_addr *gw,
79                                            struct net_device *dev, 
80                                            int dstlen, int srclen,
81                                            int metric, __u32 flags);
82
83 extern struct rt6_info          *rt6_lookup(struct in6_addr *daddr,
84                                             struct in6_addr *saddr,
85                                             int oif, int flags);
86
87 extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
88                                          struct neighbour *neigh,
89                                          struct in6_addr *addr,
90                                          int (*output)(struct sk_buff *));
91 extern int ndisc_dst_gc(int *more);
92 extern void fib6_force_start_gc(void);
93
94 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
95                                            const struct in6_addr *addr,
96                                            int anycast);
97
98 /*
99  *      support functions for ND
100  *
101  */
102 extern struct rt6_info *        rt6_get_dflt_router(struct in6_addr *addr,
103                                                     struct net_device *dev);
104 extern struct rt6_info *        rt6_add_dflt_router(struct in6_addr *gwaddr,
105                                                     struct net_device *dev,
106                                                     unsigned int pref);
107
108 extern void                     rt6_purge_dflt_routers(void);
109
110 extern int                      rt6_route_rcv(struct net_device *dev,
111                                               u8 *opt, int len,
112                                               struct in6_addr *gwaddr);
113
114 extern void                     rt6_redirect(struct in6_addr *dest,
115                                              struct in6_addr *src,
116                                              struct in6_addr *saddr,
117                                              struct neighbour *neigh,
118                                              u8 *lladdr,
119                                              int on_link);
120
121 extern void                     rt6_pmtu_discovery(struct in6_addr *daddr,
122                                                    struct in6_addr *saddr,
123                                                    struct net_device *dev,
124                                                    u32 pmtu);
125
126 struct nlmsghdr;
127 struct netlink_callback;
128 extern int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb);
129 extern int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
130 extern int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
131 extern int inet6_rtm_getroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
132
133 struct rt6_rtnl_dump_arg
134 {
135         struct sk_buff *skb;
136         struct netlink_callback *cb;
137 };
138
139 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
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, struct in6_addr *saddr)
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 #ifdef CONFIG_IPV6_SUBTREES
157         np->saddr_cache = saddr;
158 #endif
159         np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
160 }
161
162 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
163                                  struct in6_addr *daddr, struct in6_addr *saddr)
164 {
165         write_lock(&sk->sk_dst_lock);
166         __ip6_dst_store(sk, dst, daddr, saddr);
167         write_unlock(&sk->sk_dst_lock);
168 }
169
170 static inline int ipv6_unicast_destination(struct sk_buff *skb)
171 {
172         struct rt6_info *rt = (struct rt6_info *) skb->dst;
173
174         return rt->rt6i_flags & RTF_LOCAL;
175 }
176
177 #endif
178 #endif