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 MAX_RTR_SOLICITATIONS 3
5#define RTR_SOLICITATION_INTERVAL (4*HZ)
6
7#define MIN_VALID_LIFETIME (2*3600) /* 2 hours */
8
9#define TEMP_VALID_LIFETIME (7*86400)
10#define TEMP_PREFERRED_LIFETIME (86400)
11#define REGEN_MAX_RETRY (5)
12#define MAX_DESYNC_FACTOR (600)
13
14#define ADDR_CHECK_FREQUENCY (120*HZ)
15
16#define IPV6_MAX_ADDRESSES 16
17
18#include <linux/in.h>
19#include <linux/in6.h>
20
21struct prefix_info {
22 __u8 type;
23 __u8 length;
24 __u8 prefix_len;
25
26#if defined(__BIG_ENDIAN_BITFIELD)
27 __u8 onlink : 1,
28 autoconf : 1,
29 reserved : 6;
30#elif defined(__LITTLE_ENDIAN_BITFIELD)
31 __u8 reserved : 6,
32 autoconf : 1,
33 onlink : 1;
34#else
35#error "Please fix <asm/byteorder.h>"
36#endif
37 __be32 valid;
38 __be32 prefered;
39 __be32 reserved2;
40
41 struct in6_addr prefix;
42};
43
44
45#ifdef __KERNEL__
46
47#include <linux/netdevice.h>
48#include <net/if_inet6.h>
49#include <net/ipv6.h>
50
51#define IN6_ADDR_HSIZE 16
52
53extern int addrconf_init(void);
54extern void addrconf_cleanup(void);
55
56extern int addrconf_add_ifaddr(struct net *net,
57 void __user *arg);
58extern int addrconf_del_ifaddr(struct net *net,
59 void __user *arg);
60extern int addrconf_set_dstaddr(struct net *net,
61 void __user *arg);
62
63extern int ipv6_chk_addr(struct net *net,
64 struct in6_addr *addr,
65 struct net_device *dev,
66 int strict);
67
68#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
69extern int ipv6_chk_home_addr(struct net *net,
70 struct in6_addr *addr);
71#endif
72
73extern int ipv6_chk_prefix(struct in6_addr *addr,
74 struct net_device *dev);
75
76extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
77 const struct in6_addr *addr,
78 struct net_device *dev,
79 int strict);
80
81extern int ipv6_dev_get_saddr(struct net *net,
82 struct net_device *dev,
83 const struct in6_addr *daddr,
84 unsigned int srcprefs,
85 struct in6_addr *saddr);
86extern int ipv6_get_lladdr(struct net_device *dev,
87 struct in6_addr *addr,
88 unsigned char banned_flags);
89extern int ipv6_rcv_saddr_equal(const struct sock *sk,
90 const struct sock *sk2);
91extern void addrconf_join_solict(struct net_device *dev,
92 struct in6_addr *addr);
93extern void addrconf_leave_solict(struct inet6_dev *idev,
94 struct in6_addr *addr);
95
96static inline unsigned long addrconf_timeout_fixup(u32 timeout,
97 unsigned unit)
98{
99 if (timeout == 0xffffffff)
100 return ~0UL;
101
102 /*
103 * Avoid arithmetic overflow.
104 * Assuming unit is constant and non-zero, this "if" statement
105 * will go away on 64bit archs.
106 */
107 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
108 return LONG_MAX / unit;
109
110 return timeout;
111}
112
113static inline int addrconf_finite_timeout(unsigned long timeout)
114{
115 return ~timeout;
116}
117
118/*
119 * IPv6 Address Label subsystem (addrlabel.c)
120 */
121extern int ipv6_addr_label_init(void);
122extern void ipv6_addr_label_cleanup(void);
123extern void ipv6_addr_label_rtnl_register(void);
124extern u32 ipv6_addr_label(struct net *net,
125 const struct in6_addr *addr,
126 int type, int ifindex);
127
128/*
129 * multicast prototypes (mcast.c)
130 */
131extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
132 const struct in6_addr *addr);
133extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
134 const struct in6_addr *addr);
135extern void ipv6_sock_mc_close(struct sock *sk);
136extern int inet6_mc_check(struct sock *sk,
137 const struct in6_addr *mc_addr,
138 const struct in6_addr *src_addr);
139
140extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
141extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
142extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
143extern void ipv6_mc_up(struct inet6_dev *idev);
144extern void ipv6_mc_down(struct inet6_dev *idev);
145extern void ipv6_mc_unmap(struct inet6_dev *idev);
146extern void ipv6_mc_remap(struct inet6_dev *idev);
147extern void ipv6_mc_init_dev(struct inet6_dev *idev);
148extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
149extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
150
151extern int ipv6_chk_mcast_addr(struct net_device *dev,
152 const struct in6_addr *group,
153 const struct in6_addr *src_addr);
154extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
155
156extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
157
158/*
159 * anycast prototypes (anycast.c)
160 */
161extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
162extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
163extern void ipv6_sock_ac_close(struct sock *sk);
164extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
165
166extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
167extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
168extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
169 struct in6_addr *addr);
170
171
172/* Device notifier */
173extern int register_inet6addr_notifier(struct notifier_block *nb);
174extern int unregister_inet6addr_notifier(struct notifier_block *nb);
175
176/**
177 * __in6_dev_get - get inet6_dev pointer from netdevice
178 * @dev: network device
179 *
180 * Caller must hold rcu_read_lock or RTNL, because this function
181 * does not take a reference on the inet6_dev.
182 */
183static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
184{
185 return rcu_dereference_rtnl(dev->ip6_ptr);
186}
187
188/**
189 * in6_dev_get - get inet6_dev pointer from netdevice
190 * @dev: network device
191 *
192 * This version can be used in any context, and takes a reference
193 * on the inet6_dev. Callers must use in6_dev_put() later to
194 * release this reference.
195 */
196static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
197{
198 struct inet6_dev *idev;
199
200 rcu_read_lock();
201 idev = rcu_dereference(dev->ip6_ptr);
202 if (idev)
203 atomic_inc(&idev->refcnt);
204 rcu_read_unlock();
205 return idev;
206}
207
208extern void in6_dev_finish_destroy(struct inet6_dev *idev);
209
210static inline void in6_dev_put(struct inet6_dev *idev)
211{
212 if (atomic_dec_and_test(&idev->refcnt))
213 in6_dev_finish_destroy(idev);
214}
215
216static inline void __in6_dev_put(struct inet6_dev *idev)
217{
218 atomic_dec(&idev->refcnt);
219}
220
221static inline void in6_dev_hold(struct inet6_dev *idev)
222{
223 atomic_inc(&idev->refcnt);
224}
225
226extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
227
228static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
229{
230 if (atomic_dec_and_test(&ifp->refcnt))
231 inet6_ifa_finish_destroy(ifp);
232}
233
234static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
235{
236 atomic_dec(&ifp->refcnt);
237}
238
239static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
240{
241 atomic_inc(&ifp->refcnt);
242}
243
244
245/*
246 * compute link-local solicited-node multicast address
247 */
248
249static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
250 struct in6_addr *solicited)
251{
252 ipv6_addr_set(solicited,
253 htonl(0xFF020000), 0,
254 htonl(0x1),
255 htonl(0xFF000000) | addr->s6_addr32[3]);
256}
257
258static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
259{
260 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
261}
262
263static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
264{
265 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
266 addr->s6_addr32[1] | addr->s6_addr32[2] |
267 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
268}
269
270static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
271{
272 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
273 addr->s6_addr32[1] | addr->s6_addr32[2] |
274 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
275}
276
277static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
278{
279 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
280}
281
282#ifdef CONFIG_PROC_FS
283extern int if6_proc_init(void);
284extern void if6_proc_exit(void);
285#endif
286
287#endif
288#endif