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
|
#ifndef _ADDRCONF_H
#define _ADDRCONF_H
#define RETRANS_TIMER HZ
#define MAX_RTR_SOLICITATIONS 3
#define RTR_SOLICITATION_INTERVAL (4*HZ)
#define ADDR_CHECK_FREQUENCY (120*HZ)
struct prefix_info {
__u8 type;
__u8 length;
__u8 prefix_len;
#if defined(__BIG_ENDIAN_BITFIELD)
__u8 onlink : 1,
autoconf : 1,
reserved : 6;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
__u8 reserved : 6,
autoconf : 1,
onlink : 1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
__u32 valid;
__u32 prefered;
__u32 reserved2;
struct in6_addr prefix;
};
#ifdef __KERNEL__
#include <linux/in6.h>
#include <linux/netdevice.h>
#include <net/if_inet6.h>
#define IN6_ADDR_HSIZE 16
extern void addrconf_init(void);
extern void addrconf_cleanup(void);
extern int addrconf_notify(struct notifier_block *this,
unsigned long event,
void * data);
extern int addrconf_add_ifaddr(void *arg);
extern int addrconf_del_ifaddr(void *arg);
extern int addrconf_set_dstaddr(void *arg);
extern struct inet6_ifaddr * ipv6_chk_addr(struct in6_addr *addr,
struct device *dev, int nd);
extern struct inet6_ifaddr * ipv6_get_saddr(struct dst_entry *dst,
struct in6_addr *daddr);
extern struct inet6_ifaddr * ipv6_get_lladdr(struct device *dev);
/*
* multicast prototypes (mcast.c)
*/
extern int ipv6_sock_mc_join(struct sock *sk,
int ifindex,
struct in6_addr *addr);
extern int ipv6_sock_mc_drop(struct sock *sk,
int ifindex,
struct in6_addr *addr);
extern void ipv6_sock_mc_close(struct sock *sk);
extern int ipv6_dev_mc_inc(struct device *dev,
struct in6_addr *addr);
extern int ipv6_dev_mc_dec(struct device *dev,
struct in6_addr *addr);
extern void ipv6_mc_up(struct inet6_dev *idev);
extern void ipv6_mc_down(struct inet6_dev *idev);
extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
extern int ipv6_chk_mcast_addr(struct device *dev,
struct in6_addr *addr);
extern void addrconf_prefix_rcv(struct device *dev,
u8 *opt, int len);
extern struct inet6_dev * ipv6_get_idev(struct device *dev);
extern void addrconf_forwarding_on(void);
/*
* Hash function taken from net_alias.c
*/
static __inline__ u8 ipv6_addr_hash(struct in6_addr *addr)
{
__u32 word;
unsigned tmp;
/*
* We perform the hash function over the last 64 bits of the address
* This will include the IEEE address token on links that support it.
*/
word = addr->s6_addr[2] ^ addr->s6_addr32[3];
tmp = word ^ (word>>16);
tmp ^= (tmp >> 8);
return ((tmp ^ (tmp >> 4)) & 0x0f);
}
static __inline__ int ipv6_devindex_hash(int ifindex)
{
return ifindex & (IN6_ADDR_HSIZE - 1);
}
/*
* compute link-local solicited-node multicast address
*/
extern __inline__ void addrconf_addr_solict_mult_old(struct in6_addr *addr,
struct in6_addr *solicited)
{
ipv6_addr_set(solicited,
__constant_htonl(0xFF020000), 0,
__constant_htonl(0x1), addr->s6_addr32[3]);
}
extern __inline__ void addrconf_addr_solict_mult_new(struct in6_addr *addr,
struct in6_addr *solicited)
{
ipv6_addr_set(solicited,
__constant_htonl(0xFF020000), 0,
__constant_htonl(0x1),
__constant_htonl(0xFF000000) | addr->s6_addr32[3]);
}
extern __inline__ void ipv6_addr_all_nodes(struct in6_addr *addr)
{
ipv6_addr_set(addr,
__constant_htonl(0xFF020000), 0, 0,
__constant_htonl(0x1));
}
extern __inline__ void ipv6_addr_all_routers(struct in6_addr *addr)
{
ipv6_addr_set(addr,
__constant_htonl(0xFF020000), 0, 0,
__constant_htonl(0x2));
}
extern __inline__ int ipv6_addr_is_multicast(struct in6_addr *addr)
{
return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000);
}
#endif
#endif
|
