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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
10struct 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
39extern struct rt6_info ip6_null_entry;
40
41#ifdef CONFIG_IPV6_MULTIPLE_TABLES
42extern struct rt6_info ip6_prohibit_entry;
43extern struct rt6_info ip6_blk_hole_entry;
44#endif
45
46extern void ip6_route_input(struct sk_buff *skb);
47
48extern struct dst_entry * ip6_route_output(struct sock *sk,
49 struct flowi *fl);
50
51extern int ip6_route_init(void);
52extern void ip6_route_cleanup(void);
53
54extern int ipv6_route_ioctl(unsigned int cmd, void __user *arg);
55
56extern int ip6_route_add(struct fib6_config *cfg);
57extern int ip6_ins_rt(struct rt6_info *);
58extern int ip6_del_rt(struct rt6_info *);
59
60extern int ip6_rt_addr_add(struct in6_addr *addr,
61 struct net_device *dev,
62 int anycast);
63
64extern int ip6_rt_addr_del(struct in6_addr *addr,
65 struct net_device *dev);
66
67extern void rt6_sndmsg(int type, struct in6_addr *dst,
68 struct in6_addr *src,
69 struct in6_addr *gw,
70 struct net_device *dev,
71 int dstlen, int srclen,
72 int metric, __u32 flags);
73
74extern struct rt6_info *rt6_lookup(struct in6_addr *daddr,
75 struct in6_addr *saddr,
76 int oif, int flags);
77
78extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
79 struct neighbour *neigh,
80 struct in6_addr *addr,
81 int (*output)(struct sk_buff *));
82extern int ndisc_dst_gc(int *more);
83extern void fib6_force_start_gc(void);
84
85extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
86 const struct in6_addr *addr,
87 int anycast);
88
89/*
90 * support functions for ND
91 *
92 */
93extern struct rt6_info * rt6_get_dflt_router(struct in6_addr *addr,
94 struct net_device *dev);
95extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr,
96 struct net_device *dev,
97 unsigned int pref);
98
99extern void rt6_purge_dflt_routers(void);
100
101extern int rt6_route_rcv(struct net_device *dev,
102 u8 *opt, int len,
103 struct in6_addr *gwaddr);
104
105extern void rt6_redirect(struct in6_addr *dest,
106 struct in6_addr *src,
107 struct in6_addr *saddr,
108 struct neighbour *neigh,
109 u8 *lladdr,
110 int on_link);
111
112extern void rt6_pmtu_discovery(struct in6_addr *daddr,
113 struct in6_addr *saddr,
114 struct net_device *dev,
115 u32 pmtu);
116
117struct netlink_callback;
118
119struct rt6_rtnl_dump_arg
120{
121 struct sk_buff *skb;
122 struct netlink_callback *cb;
123};
124
125extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
126extern void rt6_ifdown(struct net_device *dev);
127extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
128
129extern rwlock_t rt6_lock;
130
131/*
132 * Store a destination cache entry in a socket
133 */
134static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
135 struct in6_addr *daddr, struct in6_addr *saddr)
136{
137 struct ipv6_pinfo *np = inet6_sk(sk);
138 struct rt6_info *rt = (struct rt6_info *) dst;
139
140 sk_setup_caps(sk, dst);
141 np->daddr_cache = daddr;
142#ifdef CONFIG_IPV6_SUBTREES
143 np->saddr_cache = saddr;
144#endif
145 np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
146}
147
148static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
149 struct in6_addr *daddr, struct in6_addr *saddr)
150{
151 write_lock(&sk->sk_dst_lock);
152 __ip6_dst_store(sk, dst, daddr, saddr);
153 write_unlock(&sk->sk_dst_lock);
154}
155
156static inline int ipv6_unicast_destination(struct sk_buff *skb)
157{
158 struct rt6_info *rt = (struct rt6_info *) skb->dst;
159
160 return rt->rt6i_flags & RTF_LOCAL;
161}
162
163#endif
164#endif