tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _ADDRCONF_H
2#define _ADDRCONF_H
3
4#define RETRANS_TIMER HZ
5
6#define MAX_RTR_SOLICITATIONS 3
7#define RTR_SOLICITATION_INTERVAL (4*HZ)
8
9#define MIN_VALID_LIFETIME (2*3600) /* 2 hours */
10
11#define TEMP_VALID_LIFETIME (7*86400)
12#define TEMP_PREFERRED_LIFETIME (86400)
13#define REGEN_MAX_RETRY (5)
14#define MAX_DESYNC_FACTOR (600)
15
16#define ADDR_CHECK_FREQUENCY (120*HZ)
17
18#define IPV6_MAX_ADDRESSES 16
19
20#include <linux/in6.h>
21
22struct prefix_info {
23 __u8 type;
24 __u8 length;
25 __u8 prefix_len;
26
27#if defined(__BIG_ENDIAN_BITFIELD)
28 __u8 onlink : 1,
29 autoconf : 1,
30 reserved : 6;
31#elif defined(__LITTLE_ENDIAN_BITFIELD)
32 __u8 reserved : 6,
33 autoconf : 1,
34 onlink : 1;
35#else
36#error "Please fix <asm/byteorder.h>"
37#endif
38 __u32 valid;
39 __u32 prefered;
40 __u32 reserved2;
41
42 struct in6_addr prefix;
43};
44
45
46#ifdef __KERNEL__
47
48#include <linux/config.h>
49#include <linux/netdevice.h>
50#include <net/if_inet6.h>
51#include <net/ipv6.h>
52
53#define IN6_ADDR_HSIZE 16
54
55extern int addrconf_init(void);
56extern void addrconf_cleanup(void);
57
58extern int addrconf_add_ifaddr(void __user *arg);
59extern int addrconf_del_ifaddr(void __user *arg);
60extern int addrconf_set_dstaddr(void __user *arg);
61
62extern int ipv6_chk_addr(struct in6_addr *addr,
63 struct net_device *dev,
64 int strict);
65extern struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr,
66 struct net_device *dev,
67 int strict);
68extern int ipv6_get_saddr(struct dst_entry *dst,
69 struct in6_addr *daddr,
70 struct in6_addr *saddr);
71extern int ipv6_dev_get_saddr(struct net_device *dev,
72 struct in6_addr *daddr,
73 struct in6_addr *saddr);
74extern int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *);
75extern int ipv6_rcv_saddr_equal(const struct sock *sk,
76 const struct sock *sk2);
77extern void addrconf_join_solict(struct net_device *dev,
78 struct in6_addr *addr);
79extern void addrconf_leave_solict(struct inet6_dev *idev,
80 struct in6_addr *addr);
81
82/*
83 * multicast prototypes (mcast.c)
84 */
85extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
86 struct in6_addr *addr);
87extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
88 struct in6_addr *addr);
89extern void ipv6_sock_mc_close(struct sock *sk);
90extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
91 struct in6_addr *src_addr);
92
93extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr);
94extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
95extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr);
96extern void ipv6_mc_up(struct inet6_dev *idev);
97extern void ipv6_mc_down(struct inet6_dev *idev);
98extern void ipv6_mc_init_dev(struct inet6_dev *idev);
99extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
100extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
101
102extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
103 struct in6_addr *src_addr);
104extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
105
106extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
107
108extern int ipv6_get_hoplimit(struct net_device *dev);
109
110/*
111 * anycast prototypes (anycast.c)
112 */
113extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
114extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
115extern void ipv6_sock_ac_close(struct sock *sk);
116extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
117
118extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
119extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
120extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr);
121
122
123/* Device notifier */
124extern int register_inet6addr_notifier(struct notifier_block *nb);
125extern int unregister_inet6addr_notifier(struct notifier_block *nb);
126
127static inline struct inet6_dev *
128__in6_dev_get(struct net_device *dev)
129{
130 return (struct inet6_dev *)dev->ip6_ptr;
131}
132
133extern rwlock_t addrconf_lock;
134
135static inline struct inet6_dev *
136in6_dev_get(struct net_device *dev)
137{
138 struct inet6_dev *idev = NULL;
139 read_lock(&addrconf_lock);
140 idev = dev->ip6_ptr;
141 if (idev)
142 atomic_inc(&idev->refcnt);
143 read_unlock(&addrconf_lock);
144 return idev;
145}
146
147extern void in6_dev_finish_destroy(struct inet6_dev *idev);
148
149static inline void
150in6_dev_put(struct inet6_dev *idev)
151{
152 if (atomic_dec_and_test(&idev->refcnt))
153 in6_dev_finish_destroy(idev);
154}
155
156#define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt)
157#define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt)
158
159
160extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
161
162static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
163{
164 if (atomic_dec_and_test(&ifp->refcnt))
165 inet6_ifa_finish_destroy(ifp);
166}
167
168#define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt)
169#define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt)
170
171
172extern void addrconf_forwarding_on(void);
173/*
174 * Hash function taken from net_alias.c
175 */
176
177static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr)
178{
179 __u32 word;
180
181 /*
182 * We perform the hash function over the last 64 bits of the address
183 * This will include the IEEE address token on links that support it.
184 */
185
186 word = addr->s6_addr32[2] ^ addr->s6_addr32[3];
187 word ^= (word >> 16);
188 word ^= (word >> 8);
189
190 return ((word ^ (word >> 4)) & 0x0f);
191}
192
193/*
194 * compute link-local solicited-node multicast address
195 */
196
197static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
198 struct in6_addr *solicited)
199{
200 ipv6_addr_set(solicited,
201 __constant_htonl(0xFF020000), 0,
202 __constant_htonl(0x1),
203 __constant_htonl(0xFF000000) | addr->s6_addr32[3]);
204}
205
206
207static inline void ipv6_addr_all_nodes(struct in6_addr *addr)
208{
209 ipv6_addr_set(addr,
210 __constant_htonl(0xFF020000), 0, 0,
211 __constant_htonl(0x1));
212}
213
214static inline void ipv6_addr_all_routers(struct in6_addr *addr)
215{
216 ipv6_addr_set(addr,
217 __constant_htonl(0xFF020000), 0, 0,
218 __constant_htonl(0x2));
219}
220
221static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
222{
223 return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000);
224}
225
226static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
227{
228 return (addr->s6_addr32[0] == htonl(0xff020000) &&
229 addr->s6_addr32[1] == 0 &&
230 addr->s6_addr32[2] == 0 &&
231 addr->s6_addr32[3] == htonl(0x00000001));
232}
233
234static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
235{
236 return (addr->s6_addr32[0] == htonl(0xff020000) &&
237 addr->s6_addr32[1] == 0 &&
238 addr->s6_addr32[2] == 0 &&
239 addr->s6_addr32[3] == htonl(0x00000002));
240}
241
242#ifdef CONFIG_PROC_FS
243extern int if6_proc_init(void);
244extern void if6_proc_exit(void);
245#endif
246
247#endif
248#endif