Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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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/in.h>
21#include <linux/in6.h>
22
23struct prefix_info {
24 __u8 type;
25 __u8 length;
26 __u8 prefix_len;
27
28#if defined(__BIG_ENDIAN_BITFIELD)
29 __u8 onlink : 1,
30 autoconf : 1,
31 reserved : 6;
32#elif defined(__LITTLE_ENDIAN_BITFIELD)
33 __u8 reserved : 6,
34 autoconf : 1,
35 onlink : 1;
36#else
37#error "Please fix <asm/byteorder.h>"
38#endif
39 __be32 valid;
40 __be32 prefered;
41 __be32 reserved2;
42
43 struct in6_addr prefix;
44};
45
46
47#ifdef __KERNEL__
48
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 net *net,
63 struct in6_addr *addr,
64 struct net_device *dev,
65 int strict);
66
67#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
68extern int ipv6_chk_home_addr(struct net *net,
69 struct in6_addr *addr);
70#endif
71extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
72 struct in6_addr *addr,
73 struct net_device *dev,
74 int strict);
75
76extern int ipv6_get_saddr(struct dst_entry *dst,
77 struct in6_addr *daddr,
78 struct in6_addr *saddr);
79extern int ipv6_dev_get_saddr(struct net_device *dev,
80 struct in6_addr *daddr,
81 struct in6_addr *saddr);
82extern int ipv6_get_lladdr(struct net_device *dev,
83 struct in6_addr *addr,
84 unsigned char banned_flags);
85extern int ipv6_rcv_saddr_equal(const struct sock *sk,
86 const struct sock *sk2);
87extern void addrconf_join_solict(struct net_device *dev,
88 struct in6_addr *addr);
89extern void addrconf_leave_solict(struct inet6_dev *idev,
90 struct in6_addr *addr);
91
92/*
93 * IPv6 Address Label subsystem (addrlabel.c)
94 */
95extern int ipv6_addr_label_init(void);
96extern void ipv6_addr_label_rtnl_register(void);
97extern u32 ipv6_addr_label(const struct in6_addr *addr,
98 int type, int ifindex);
99
100/*
101 * multicast prototypes (mcast.c)
102 */
103extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
104 struct in6_addr *addr);
105extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
106 struct in6_addr *addr);
107extern void ipv6_sock_mc_close(struct sock *sk);
108extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
109 struct in6_addr *src_addr);
110
111extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr);
112extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
113extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr);
114extern void ipv6_mc_up(struct inet6_dev *idev);
115extern void ipv6_mc_down(struct inet6_dev *idev);
116extern void ipv6_mc_init_dev(struct inet6_dev *idev);
117extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
118extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
119
120extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
121 struct in6_addr *src_addr);
122extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
123
124extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
125
126extern int ipv6_get_hoplimit(struct net_device *dev);
127
128/*
129 * anycast prototypes (anycast.c)
130 */
131extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
132extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
133extern void ipv6_sock_ac_close(struct sock *sk);
134extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
135
136extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
137extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
138extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr);
139
140
141/* Device notifier */
142extern int register_inet6addr_notifier(struct notifier_block *nb);
143extern int unregister_inet6addr_notifier(struct notifier_block *nb);
144
145static inline struct inet6_dev *
146__in6_dev_get(struct net_device *dev)
147{
148 return rcu_dereference(dev->ip6_ptr);
149}
150
151static inline struct inet6_dev *
152in6_dev_get(struct net_device *dev)
153{
154 struct inet6_dev *idev = NULL;
155 rcu_read_lock();
156 idev = __in6_dev_get(dev);
157 if (idev)
158 atomic_inc(&idev->refcnt);
159 rcu_read_unlock();
160 return idev;
161}
162
163extern void in6_dev_finish_destroy(struct inet6_dev *idev);
164
165static inline void
166in6_dev_put(struct inet6_dev *idev)
167{
168 if (atomic_dec_and_test(&idev->refcnt))
169 in6_dev_finish_destroy(idev);
170}
171
172#define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt)
173#define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt)
174
175
176extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
177
178static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
179{
180 if (atomic_dec_and_test(&ifp->refcnt))
181 inet6_ifa_finish_destroy(ifp);
182}
183
184#define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt)
185#define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt)
186
187
188extern void addrconf_forwarding_on(void);
189/*
190 * Hash function taken from net_alias.c
191 */
192
193static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr)
194{
195 __u32 word;
196
197 /*
198 * We perform the hash function over the last 64 bits of the address
199 * This will include the IEEE address token on links that support it.
200 */
201
202 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
203 word ^= (word >> 16);
204 word ^= (word >> 8);
205
206 return ((word ^ (word >> 4)) & 0x0f);
207}
208
209/*
210 * compute link-local solicited-node multicast address
211 */
212
213static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
214 struct in6_addr *solicited)
215{
216 ipv6_addr_set(solicited,
217 __constant_htonl(0xFF020000), 0,
218 __constant_htonl(0x1),
219 __constant_htonl(0xFF000000) | addr->s6_addr32[3]);
220}
221
222
223static inline void ipv6_addr_all_nodes(struct in6_addr *addr)
224{
225 ipv6_addr_set(addr,
226 __constant_htonl(0xFF020000), 0, 0,
227 __constant_htonl(0x1));
228}
229
230static inline void ipv6_addr_all_routers(struct in6_addr *addr)
231{
232 ipv6_addr_set(addr,
233 __constant_htonl(0xFF020000), 0, 0,
234 __constant_htonl(0x2));
235}
236
237static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
238{
239 return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000);
240}
241
242static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
243{
244 return (addr->s6_addr32[0] == htonl(0xff020000) &&
245 addr->s6_addr32[1] == 0 &&
246 addr->s6_addr32[2] == 0 &&
247 addr->s6_addr32[3] == htonl(0x00000001));
248}
249
250static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
251{
252 return (addr->s6_addr32[0] == htonl(0xff020000) &&
253 addr->s6_addr32[1] == 0 &&
254 addr->s6_addr32[2] == 0 &&
255 addr->s6_addr32[3] == htonl(0x00000002));
256}
257
258static inline int ipv6_isatap_eui64(u8 *eui, __be32 addr)
259{
260 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
261 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
262 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
263 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
264 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
265 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
266 eui[1] = 0;
267 eui[2] = 0x5E;
268 eui[3] = 0xFE;
269 memcpy (eui+4, &addr, 4);
270 return 0;
271}
272
273static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
274{
275 return ((addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE));
276}
277
278#ifdef CONFIG_PROC_FS
279extern int if6_proc_init(void);
280extern void if6_proc_exit(void);
281#endif
282
283#endif
284#endif