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 0x1
34 #define RT6_LOOKUP_F_REACHABLE 0x2
35 #define RT6_LOOKUP_F_HAS_SADDR 0x4
36
37 extern struct rt6_info ip6_null_entry;
38
39 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
40 extern struct rt6_info ip6_prohibit_entry;
41 extern struct rt6_info ip6_blk_hole_entry;
42 #endif
43
44 extern void ip6_route_input(struct sk_buff *skb);
45
46 extern struct dst_entry * ip6_route_output(struct sock *sk,
47 struct flowi *fl);
48
49 extern int ip6_route_init(void);
50 extern void ip6_route_cleanup(void);
51
52 extern int ipv6_route_ioctl(unsigned int cmd, void __user *arg);
53
54 extern int ip6_route_add(struct fib6_config *cfg);
55 extern int ip6_ins_rt(struct rt6_info *);
56 extern int ip6_del_rt(struct rt6_info *);
57
58 extern int ip6_rt_addr_add(struct in6_addr *addr,
59 struct net_device *dev,
60 int anycast);
61
62 extern int ip6_rt_addr_del(struct in6_addr *addr,
63 struct net_device *dev);
64
65 extern void rt6_sndmsg(int type, struct in6_addr *dst,
66 struct in6_addr *src,
67 struct in6_addr *gw,
68 struct net_device *dev,
69 int dstlen, int srclen,
70 int metric, __u32 flags);
71
72 extern struct rt6_info *rt6_lookup(struct in6_addr *daddr,
73 struct in6_addr *saddr,
74 int oif, int flags);
75
76 extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
77 struct neighbour *neigh,
78 struct in6_addr *addr,
79 int (*output)(struct sk_buff *));
80 extern int ndisc_dst_gc(int *more);
81 extern void fib6_force_start_gc(void);
82
83 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
84 const struct in6_addr *addr,
85 int anycast);
86
87 /*
88 * support functions for ND
89 *
90 */
91 extern struct rt6_info * rt6_get_dflt_router(struct in6_addr *addr,
92 struct net_device *dev);
93 extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr,
94 struct net_device *dev,
95 unsigned int pref);
96
97 extern void rt6_purge_dflt_routers(void);
98
99 extern int rt6_route_rcv(struct net_device *dev,
100 u8 *opt, int len,
101 struct in6_addr *gwaddr);
102
103 extern void rt6_redirect(struct in6_addr *dest,
104 struct in6_addr *src,
105 struct in6_addr *saddr,
106 struct neighbour *neigh,
107 u8 *lladdr,
108 int on_link);
109
110 extern void rt6_pmtu_discovery(struct in6_addr *daddr,
111 struct in6_addr *saddr,
112 struct net_device *dev,
113 u32 pmtu);
114
115 struct netlink_callback;
116
117 struct rt6_rtnl_dump_arg
118 {
119 struct sk_buff *skb;
120 struct netlink_callback *cb;
121 };
122
123 extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
124 extern void rt6_ifdown(struct net_device *dev);
125 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
126
127 extern rwlock_t rt6_lock;
128
129 /*
130 * Store a destination cache entry in a socket
131 */
132 static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
133 struct in6_addr *daddr, struct in6_addr *saddr)
134 {
135 struct ipv6_pinfo *np = inet6_sk(sk);
136 struct rt6_info *rt = (struct rt6_info *) dst;
137
138 sk_setup_caps(sk, dst);
139 np->daddr_cache = daddr;
140 #ifdef CONFIG_IPV6_SUBTREES
141 np->saddr_cache = saddr;
142 #endif
143 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
144 }
145
146 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
147 struct in6_addr *daddr, struct in6_addr *saddr)
148 {
149 write_lock(&sk->sk_dst_lock);
150 __ip6_dst_store(sk, dst, daddr, saddr);
151 write_unlock(&sk->sk_dst_lock);
152 }
153
154 static inline int ipv6_unicast_destination(struct sk_buff *skb)
155 {
156 struct rt6_info *rt = (struct rt6_info *) skb->dst;
157
158 return rt->rt6i_flags & RTF_LOCAL;
159 }
160
161 #endif
162 #endif
163
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