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[IPV6] ADDRCONF: Convert addrconf_lock to RCU.
[deliverable/linux.git] / include / net / addrconf.h
CommitLineData
1da177e4
LT		 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
6a800d45
PM		 20#include <linux/in6.h>
21
1da177e4
LT		 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
1da177e4
LT		 48#include <linux/netdevice.h>
49#include <net/if_inet6.h>
e4553edd 50#include <net/ipv6.h>
1da177e4
LT		 51
52#define IN6_ADDR_HSIZE 16
53
54extern int addrconf_init(void);
55extern void addrconf_cleanup(void);
56
57extern int addrconf_add_ifaddr(void __user *arg);
58extern int addrconf_del_ifaddr(void __user *arg);
59extern int addrconf_set_dstaddr(void __user *arg);
60
61extern int ipv6_chk_addr(struct in6_addr *addr,
62 struct net_device *dev,
63 int strict);
65d4ed92
MN		 64/* XXX: this is a placeholder till addrconf supports */
65#ifdef CONFIG_IPV6_MIP6
66static inline int ipv6_chk_home_addr(struct in6_addr *addr)
67{
68 return 0;
69}
70#endif
1da177e4
LT		 71extern struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr,
72 struct net_device *dev,
73 int strict);
74extern int ipv6_get_saddr(struct dst_entry *dst,
75 struct in6_addr *daddr,
76 struct in6_addr *saddr);
77extern int ipv6_dev_get_saddr(struct net_device *dev,
78 struct in6_addr *daddr,
79 struct in6_addr *saddr);
80extern int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *);
81extern int ipv6_rcv_saddr_equal(const struct sock *sk,
82 const struct sock *sk2);
83extern void addrconf_join_solict(struct net_device *dev,
84 struct in6_addr *addr);
85extern void addrconf_leave_solict(struct inet6_dev *idev,
86 struct in6_addr *addr);
87
88/*
89 * multicast prototypes (mcast.c)
90 */
91extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
92 struct in6_addr *addr);
93extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
94 struct in6_addr *addr);
95extern void ipv6_sock_mc_close(struct sock *sk);
96extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
97 struct in6_addr *src_addr);
98
99extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr);
100extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
101extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr);
102extern void ipv6_mc_up(struct inet6_dev *idev);
103extern void ipv6_mc_down(struct inet6_dev *idev);
104extern void ipv6_mc_init_dev(struct inet6_dev *idev);
105extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
106extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
107
108extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
109 struct in6_addr *src_addr);
110extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
111
112extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
113
114extern int ipv6_get_hoplimit(struct net_device *dev);
115
116/*
117 * anycast prototypes (anycast.c)
118 */
119extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
120extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
121extern void ipv6_sock_ac_close(struct sock *sk);
122extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
123
124extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
125extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
126extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr);
127
128
129/* Device notifier */
130extern int register_inet6addr_notifier(struct notifier_block *nb);
131extern int unregister_inet6addr_notifier(struct notifier_block *nb);
132
133static inline struct inet6_dev *
134__in6_dev_get(struct net_device *dev)
135{
8814c4b5 136 return rcu_dereference(dev->ip6_ptr);
1da177e4
LT		 137}
138
1da177e4
LT		 139static inline struct inet6_dev *
140in6_dev_get(struct net_device *dev)
141{
142 struct inet6_dev *idev = NULL;
8814c4b5
YH		 143 rcu_read_lock();
144 idev = __in6_dev_get(dev);
1da177e4
LT		 145 if (idev)
146 atomic_inc(&idev->refcnt);
8814c4b5 147 rcu_read_unlock();
1da177e4
LT		 148 return idev;
149}
150
151extern void in6_dev_finish_destroy(struct inet6_dev *idev);
152
153static inline void
154in6_dev_put(struct inet6_dev *idev)
155{
156 if (atomic_dec_and_test(&idev->refcnt))
157 in6_dev_finish_destroy(idev);
158}
159
160#define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt)
161#define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt)
162
163
164extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
165
166static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
167{
168 if (atomic_dec_and_test(&ifp->refcnt))
169 inet6_ifa_finish_destroy(ifp);
170}
171
172#define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt)
173#define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt)
174
175
176extern void addrconf_forwarding_on(void);
177/*
178 * Hash function taken from net_alias.c
179 */
180
181static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr)
182{
183 __u32 word;
184
185 /*
186 * We perform the hash function over the last 64 bits of the address
187 * This will include the IEEE address token on links that support it.
188 */
189
190 word = addr->s6_addr32[2] ^ addr->s6_addr32[3];
191 word ^= (word >> 16);
192 word ^= (word >> 8);
193
194 return ((word ^ (word >> 4)) & 0x0f);
195}
196
197/*
198 * compute link-local solicited-node multicast address
199 */
200
201static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
202 struct in6_addr *solicited)
203{
204 ipv6_addr_set(solicited,
205 __constant_htonl(0xFF020000), 0,
206 __constant_htonl(0x1),
207 __constant_htonl(0xFF000000) | addr->s6_addr32[3]);
208}
209
210
211static inline void ipv6_addr_all_nodes(struct in6_addr *addr)
212{
213 ipv6_addr_set(addr,
214 __constant_htonl(0xFF020000), 0, 0,
215 __constant_htonl(0x1));
216}
217
218static inline void ipv6_addr_all_routers(struct in6_addr *addr)
219{
220 ipv6_addr_set(addr,
221 __constant_htonl(0xFF020000), 0, 0,
222 __constant_htonl(0x2));
223}
224
225static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
226{
227 return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000);
228}
229
230static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
231{
232 return (addr->s6_addr32[0] == htonl(0xff020000) &&
233 addr->s6_addr32[1] == 0 &&
234 addr->s6_addr32[2] == 0 &&
235 addr->s6_addr32[3] == htonl(0x00000001));
236}
237
238static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
239{
240 return (addr->s6_addr32[0] == htonl(0xff020000) &&
241 addr->s6_addr32[1] == 0 &&
242 addr->s6_addr32[2] == 0 &&
243 addr->s6_addr32[3] == htonl(0x00000002));
244}
245
20380731
ACM		 246#ifdef CONFIG_PROC_FS
247extern int if6_proc_init(void);
248extern void if6_proc_exit(void);
249#endif
250
1da177e4
LT		 251#endif
252#endif
Linux kernel - Deliverables
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