summaryrefslogtreecommitdiff
path: root/include/net/ip6_route.h
blob: 5456fdd6d047b1e8149814a623ee77ed56670970 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
#ifndef _NET_IP6_ROUTE_H
#define _NET_IP6_ROUTE_H

#define IP6_RT_PRIO_FW		16
#define IP6_RT_PRIO_USER	1024
#define IP6_RT_PRIO_ADDRCONF	256
#define IP6_RT_PRIO_KERN	512
#define IP6_RT_FLOW_MASK	0x00ff

struct route_info {
	__u8			type;
	__u8			length;
	__u8			prefix_len;
#if defined(__BIG_ENDIAN_BITFIELD)
	__u8			reserved_h:3,
				route_pref:2,
				reserved_l:3;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	__u8			reserved_l:3,
				route_pref:2,
				reserved_h:3;
#endif
	__be32			lifetime;
	__u8			prefix[0];	/* 0,8 or 16 */
};

#ifdef __KERNEL__

#include <net/flow.h>
#include <net/ip6_fib.h>
#include <net/sock.h>
#include <linux/ip.h>
#include <linux/ipv6.h>

#define RT6_LOOKUP_F_IFACE	0x1
#define RT6_LOOKUP_F_REACHABLE	0x2
#define RT6_LOOKUP_F_HAS_SADDR	0x4

extern struct rt6_info	ip6_null_entry;

#ifdef CONFIG_IPV6_MULTIPLE_TABLES
extern struct rt6_info	ip6_prohibit_entry;
extern struct rt6_info	ip6_blk_hole_entry;
#endif

extern int ip6_rt_gc_interval;

extern void			ip6_route_input(struct sk_buff *skb);

extern struct dst_entry *	ip6_route_output(struct sock *sk,
						 struct flowi *fl);

extern void			ip6_route_init(void);
extern void			ip6_route_cleanup(void);

extern int			ipv6_route_ioctl(unsigned int cmd, void __user *arg);

extern int			ip6_route_add(struct fib6_config *cfg);
extern int			ip6_ins_rt(struct rt6_info *);
extern int			ip6_del_rt(struct rt6_info *);

extern int			ip6_rt_addr_add(struct in6_addr *addr,
						struct net_device *dev,
						int anycast);

extern int			ip6_rt_addr_del(struct in6_addr *addr,
						struct net_device *dev);

extern void			rt6_sndmsg(int type, struct in6_addr *dst,
					   struct in6_addr *src,
					   struct in6_addr *gw,
					   struct net_device *dev, 
					   int dstlen, int srclen,
					   int metric, __u32 flags);

extern struct rt6_info		*rt6_lookup(struct in6_addr *daddr,
					    struct in6_addr *saddr,
					    int oif, int flags);

extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
					 struct neighbour *neigh,
					 struct in6_addr *addr,
					 int (*output)(struct sk_buff *));
extern int ndisc_dst_gc(int *more);
extern void fib6_force_start_gc(void);

extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
					   const struct in6_addr *addr,
					   int anycast);

/*
 *	support functions for ND
 *
 */
extern struct rt6_info *	rt6_get_dflt_router(struct in6_addr *addr,
						    struct net_device *dev);
extern struct rt6_info *	rt6_add_dflt_router(struct in6_addr *gwaddr,
						    struct net_device *dev,
						    unsigned int pref);

extern void			rt6_purge_dflt_routers(void);

extern int			rt6_route_rcv(struct net_device *dev,
					      u8 *opt, int len,
					      struct in6_addr *gwaddr);

extern void			rt6_redirect(struct in6_addr *dest,
					     struct in6_addr *src,
					     struct in6_addr *saddr,
					     struct neighbour *neigh,
					     u8 *lladdr,
					     int on_link);

extern void			rt6_pmtu_discovery(struct in6_addr *daddr,
						   struct in6_addr *saddr,
						   struct net_device *dev,
						   u32 pmtu);

struct netlink_callback;

struct rt6_rtnl_dump_arg
{
	struct sk_buff *skb;
	struct netlink_callback *cb;
};

extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
extern void rt6_ifdown(struct net_device *dev);
extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);

extern rwlock_t rt6_lock;

/*
 *	Store a destination cache entry in a socket
 */
static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
				   struct in6_addr *daddr, struct in6_addr *saddr)
{
	struct ipv6_pinfo *np = inet6_sk(sk);
	struct rt6_info *rt = (struct rt6_info *) dst;

	sk_setup_caps(sk, dst);
	np->daddr_cache = daddr;
#ifdef CONFIG_IPV6_SUBTREES
	np->saddr_cache = saddr;
#endif
	np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
}

static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
				 struct in6_addr *daddr, struct in6_addr *saddr)
{
	write_lock(&sk->sk_dst_lock);
	__ip6_dst_store(sk, dst, daddr, saddr);
	write_unlock(&sk->sk_dst_lock);
}

static inline int ipv6_unicast_destination(struct sk_buff *skb)
{
	struct rt6_info *rt = (struct rt6_info *) skb->dst;

	return rt->rt6i_flags & RTF_LOCAL;
}

#endif
#endif