Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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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 (3)
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#include <linux/netdevice.h>
46#include <net/if_inet6.h>
47#include <net/ipv6.h>
48
49#define IN6_ADDR_HSIZE_SHIFT 4
50#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
51
52extern int addrconf_init(void);
53extern void addrconf_cleanup(void);
54
55extern int addrconf_add_ifaddr(struct net *net,
56 void __user *arg);
57extern int addrconf_del_ifaddr(struct net *net,
58 void __user *arg);
59extern int addrconf_set_dstaddr(struct net *net,
60 void __user *arg);
61
62extern int ipv6_chk_addr(struct net *net,
63 const 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 const struct in6_addr *addr);
70#endif
71
72extern int ipv6_chk_prefix(const struct in6_addr *addr,
73 struct net_device *dev);
74
75extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
76 const struct in6_addr *addr,
77 struct net_device *dev,
78 int strict);
79
80extern int ipv6_dev_get_saddr(struct net *net,
81 const struct net_device *dev,
82 const struct in6_addr *daddr,
83 unsigned int srcprefs,
84 struct in6_addr *saddr);
85extern int ipv6_get_lladdr(struct net_device *dev,
86 struct in6_addr *addr,
87 unsigned char banned_flags);
88extern int ipv6_rcv_saddr_equal(const struct sock *sk,
89 const struct sock *sk2);
90extern void addrconf_join_solict(struct net_device *dev,
91 const struct in6_addr *addr);
92extern void addrconf_leave_solict(struct inet6_dev *idev,
93 const struct in6_addr *addr);
94
95static inline unsigned long addrconf_timeout_fixup(u32 timeout,
96 unsigned int unit)
97{
98 if (timeout == 0xffffffff)
99 return ~0UL;
100
101 /*
102 * Avoid arithmetic overflow.
103 * Assuming unit is constant and non-zero, this "if" statement
104 * will go away on 64bit archs.
105 */
106 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
107 return LONG_MAX / unit;
108
109 return timeout;
110}
111
112static inline int addrconf_finite_timeout(unsigned long timeout)
113{
114 return ~timeout;
115}
116
117/*
118 * IPv6 Address Label subsystem (addrlabel.c)
119 */
120extern int ipv6_addr_label_init(void);
121extern void ipv6_addr_label_cleanup(void);
122extern void ipv6_addr_label_rtnl_register(void);
123extern u32 ipv6_addr_label(struct net *net,
124 const struct in6_addr *addr,
125 int type, int ifindex);
126
127/*
128 * multicast prototypes (mcast.c)
129 */
130extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
131 const struct in6_addr *addr);
132extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
133 const struct in6_addr *addr);
134extern void ipv6_sock_mc_close(struct sock *sk);
135extern bool inet6_mc_check(struct sock *sk,
136 const struct in6_addr *mc_addr,
137 const struct in6_addr *src_addr);
138
139extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
140extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
141extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
142extern void ipv6_mc_up(struct inet6_dev *idev);
143extern void ipv6_mc_down(struct inet6_dev *idev);
144extern void ipv6_mc_unmap(struct inet6_dev *idev);
145extern void ipv6_mc_remap(struct inet6_dev *idev);
146extern void ipv6_mc_init_dev(struct inet6_dev *idev);
147extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
148extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
149
150extern bool ipv6_chk_mcast_addr(struct net_device *dev,
151 const struct in6_addr *group,
152 const struct in6_addr *src_addr);
153extern bool ipv6_is_mld(struct sk_buff *skb, int nexthdr);
154
155extern void addrconf_prefix_rcv(struct net_device *dev,
156 u8 *opt, int len, bool sllao);
157
158/*
159 * anycast prototypes (anycast.c)
160 */
161extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr);
162extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr);
163extern void ipv6_sock_ac_close(struct sock *sk);
164
165extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
166extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
167extern bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
168 const struct in6_addr *addr);
169
170
171/* Device notifier */
172extern int register_inet6addr_notifier(struct notifier_block *nb);
173extern int unregister_inet6addr_notifier(struct notifier_block *nb);
174
175extern void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
176 struct ipv6_devconf *devconf);
177
178/**
179 * __in6_dev_get - get inet6_dev pointer from netdevice
180 * @dev: network device
181 *
182 * Caller must hold rcu_read_lock or RTNL, because this function
183 * does not take a reference on the inet6_dev.
184 */
185static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
186{
187 return rcu_dereference_rtnl(dev->ip6_ptr);
188}
189
190/**
191 * in6_dev_get - get inet6_dev pointer from netdevice
192 * @dev: network device
193 *
194 * This version can be used in any context, and takes a reference
195 * on the inet6_dev. Callers must use in6_dev_put() later to
196 * release this reference.
197 */
198static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
199{
200 struct inet6_dev *idev;
201
202 rcu_read_lock();
203 idev = rcu_dereference(dev->ip6_ptr);
204 if (idev)
205 atomic_inc(&idev->refcnt);
206 rcu_read_unlock();
207 return idev;
208}
209
210extern void in6_dev_finish_destroy(struct inet6_dev *idev);
211
212static inline void in6_dev_put(struct inet6_dev *idev)
213{
214 if (atomic_dec_and_test(&idev->refcnt))
215 in6_dev_finish_destroy(idev);
216}
217
218static inline void __in6_dev_put(struct inet6_dev *idev)
219{
220 atomic_dec(&idev->refcnt);
221}
222
223static inline void in6_dev_hold(struct inet6_dev *idev)
224{
225 atomic_inc(&idev->refcnt);
226}
227
228extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
229
230static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
231{
232 if (atomic_dec_and_test(&ifp->refcnt))
233 inet6_ifa_finish_destroy(ifp);
234}
235
236static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
237{
238 atomic_dec(&ifp->refcnt);
239}
240
241static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
242{
243 atomic_inc(&ifp->refcnt);
244}
245
246
247/*
248 * compute link-local solicited-node multicast address
249 */
250
251static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
252 struct in6_addr *solicited)
253{
254 ipv6_addr_set(solicited,
255 htonl(0xFF020000), 0,
256 htonl(0x1),
257 htonl(0xFF000000) | addr->s6_addr32[3]);
258}
259
260static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
261{
262 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
263}
264
265static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
266{
267 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
268 addr->s6_addr32[1] | addr->s6_addr32[2] |
269 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
270}
271
272static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
273{
274 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
275 addr->s6_addr32[1] | addr->s6_addr32[2] |
276 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
277}
278
279static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
280{
281 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
282}
283
284#ifdef CONFIG_PROC_FS
285extern int if6_proc_init(void);
286extern void if6_proc_exit(void);
287#endif
288
289#endif