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