[IPV6]: Make ip6_route_init to return an error code.
[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         __be32                  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 extern struct rt6_info  ip6_null_entry;
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 int ip6_rt_gc_interval;
47
48 extern void                     ip6_route_input(struct sk_buff *skb);
49
50 extern struct dst_entry *       ip6_route_output(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(unsigned int cmd, void __user *arg);
57
58 extern int                      ip6_route_add(struct fib6_config *cfg);
59 extern int                      ip6_ins_rt(struct rt6_info *);
60 extern int                      ip6_del_rt(struct rt6_info *);
61
62 extern int                      ip6_rt_addr_add(struct in6_addr *addr,
63                                                 struct net_device *dev,
64                                                 int anycast);
65
66 extern int                      ip6_rt_addr_del(struct in6_addr *addr,
67                                                 struct net_device *dev);
68
69 extern void                     rt6_sndmsg(int type, struct in6_addr *dst,
70                                            struct in6_addr *src,
71                                            struct in6_addr *gw,
72                                            struct net_device *dev, 
73                                            int dstlen, int srclen,
74                                            int metric, __u32 flags);
75
76 extern struct rt6_info          *rt6_lookup(struct in6_addr *daddr,
77                                             struct in6_addr *saddr,
78                                             int oif, int flags);
79
80 extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
81                                          struct neighbour *neigh,
82                                          struct in6_addr *addr,
83                                          int (*output)(struct sk_buff *));
84 extern int ndisc_dst_gc(int *more);
85 extern void fib6_force_start_gc(void);
86
87 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
88                                            const struct in6_addr *addr,
89                                            int anycast);
90
91 /*
92  *      support functions for ND
93  *
94  */
95 extern struct rt6_info *        rt6_get_dflt_router(struct in6_addr *addr,
96                                                     struct net_device *dev);
97 extern struct rt6_info *        rt6_add_dflt_router(struct in6_addr *gwaddr,
98                                                     struct net_device *dev,
99                                                     unsigned int pref);
100
101 extern void                     rt6_purge_dflt_routers(void);
102
103 extern int                      rt6_route_rcv(struct net_device *dev,
104                                               u8 *opt, int len,
105                                               struct in6_addr *gwaddr);
106
107 extern void                     rt6_redirect(struct in6_addr *dest,
108                                              struct in6_addr *src,
109                                              struct in6_addr *saddr,
110                                              struct neighbour *neigh,
111                                              u8 *lladdr,
112                                              int on_link);
113
114 extern void                     rt6_pmtu_discovery(struct in6_addr *daddr,
115                                                    struct in6_addr *saddr,
116                                                    struct net_device *dev,
117                                                    u32 pmtu);
118
119 struct netlink_callback;
120
121 struct rt6_rtnl_dump_arg
122 {
123         struct sk_buff *skb;
124         struct netlink_callback *cb;
125 };
126
127 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
128 extern void rt6_ifdown(struct net_device *dev);
129 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
130
131 extern rwlock_t rt6_lock;
132
133 /*
134  *      Store a destination cache entry in a socket
135  */
136 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
137                                    struct in6_addr *daddr, struct in6_addr *saddr)
138 {
139         struct ipv6_pinfo *np = inet6_sk(sk);
140         struct rt6_info *rt = (struct rt6_info *) dst;
141
142         sk_setup_caps(sk, dst);
143         np->daddr_cache = daddr;
144 #ifdef CONFIG_IPV6_SUBTREES
145         np->saddr_cache = saddr;
146 #endif
147         np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
148 }
149
150 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
151                                  struct in6_addr *daddr, struct in6_addr *saddr)
152 {
153         write_lock(&sk->sk_dst_lock);
154         __ip6_dst_store(sk, dst, daddr, saddr);
155         write_unlock(&sk->sk_dst_lock);
156 }
157
158 static inline int ipv6_unicast_destination(struct sk_buff *skb)
159 {
160         struct rt6_info *rt = (struct rt6_info *) skb->dst;
161
162         return rt->rt6i_flags & RTF_LOCAL;
163 }
164
165 #endif
166 #endif