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 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 16
50
51extern int addrconf_init(void);
52extern void addrconf_cleanup(void);
53
54extern int addrconf_add_ifaddr(struct net *net,
55 void __user *arg);
56extern int addrconf_del_ifaddr(struct net *net,
57 void __user *arg);
58extern int addrconf_set_dstaddr(struct net *net,
59 void __user *arg);
60
61extern int ipv6_chk_addr(struct net *net,
62 const struct in6_addr *addr,
63 struct net_device *dev,
64 int strict);
65
66#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
67extern int ipv6_chk_home_addr(struct net *net,
68 const struct in6_addr *addr);
69#endif
70
71extern int ipv6_chk_prefix(const struct in6_addr *addr,
72 struct net_device *dev);
73
74extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
75 const struct in6_addr *addr,
76 struct net_device *dev,
77 int strict);
78
79extern int ipv6_dev_get_saddr(struct net *net,
80 struct net_device *dev,
81 const struct in6_addr *daddr,
82 unsigned int srcprefs,
83 struct in6_addr *saddr);
84extern int ipv6_get_lladdr(struct net_device *dev,
85 struct in6_addr *addr,
86 unsigned char banned_flags);
87extern int ipv6_rcv_saddr_equal(const struct sock *sk,
88 const struct sock *sk2);
89extern void addrconf_join_solict(struct net_device *dev,
90 const struct in6_addr *addr);
91extern void addrconf_leave_solict(struct inet6_dev *idev,
92 const struct in6_addr *addr);
93
94static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95 unsigned unit)
96{
97 if (timeout == 0xffffffff)
98 return ~0UL;
99
100 /*
101 * Avoid arithmetic overflow.
102 * Assuming unit is constant and non-zero, this "if" statement
103 * will go away on 64bit archs.
104 */
105 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
106 return LONG_MAX / unit;
107
108 return timeout;
109}
110
111static inline int addrconf_finite_timeout(unsigned long timeout)
112{
113 return ~timeout;
114}
115
116/*
117 * IPv6 Address Label subsystem (addrlabel.c)
118 */
119extern int ipv6_addr_label_init(void);
120extern void ipv6_addr_label_cleanup(void);
121extern void ipv6_addr_label_rtnl_register(void);
122extern u32 ipv6_addr_label(struct net *net,
123 const struct in6_addr *addr,
124 int type, int ifindex);
125
126/*
127 * multicast prototypes (mcast.c)
128 */
129extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
130 const struct in6_addr *addr);
131extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
132 const struct in6_addr *addr);
133extern void ipv6_sock_mc_close(struct sock *sk);
134extern int inet6_mc_check(struct sock *sk,
135 const struct in6_addr *mc_addr,
136 const struct in6_addr *src_addr);
137
138extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
139extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
140extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
141extern void ipv6_mc_up(struct inet6_dev *idev);
142extern void ipv6_mc_down(struct inet6_dev *idev);
143extern void ipv6_mc_unmap(struct inet6_dev *idev);
144extern void ipv6_mc_remap(struct inet6_dev *idev);
145extern void ipv6_mc_init_dev(struct inet6_dev *idev);
146extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
147extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
148
149extern int ipv6_chk_mcast_addr(struct net_device *dev,
150 const struct in6_addr *group,
151 const struct in6_addr *src_addr);
152extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
153
154extern void addrconf_prefix_rcv(struct net_device *dev,
155 u8 *opt, int len, bool sllao);
156
157/*
158 * anycast prototypes (anycast.c)
159 */
160extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr);
161extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr);
162extern void ipv6_sock_ac_close(struct sock *sk);
163extern int inet6_ac_check(struct sock *sk, const struct in6_addr *addr, int ifindex);
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 int 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
175/**
176 * __in6_dev_get - get inet6_dev pointer from netdevice
177 * @dev: network device
178 *
179 * Caller must hold rcu_read_lock or RTNL, because this function
180 * does not take a reference on the inet6_dev.
181 */
182static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
183{
184 return rcu_dereference_rtnl(dev->ip6_ptr);
185}
186
187/**
188 * in6_dev_get - get inet6_dev pointer from netdevice
189 * @dev: network device
190 *
191 * This version can be used in any context, and takes a reference
192 * on the inet6_dev. Callers must use in6_dev_put() later to
193 * release this reference.
194 */
195static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
196{
197 struct inet6_dev *idev;
198
199 rcu_read_lock();
200 idev = rcu_dereference(dev->ip6_ptr);
201 if (idev)
202 atomic_inc(&idev->refcnt);
203 rcu_read_unlock();
204 return idev;
205}
206
207extern void in6_dev_finish_destroy(struct inet6_dev *idev);
208
209static inline void in6_dev_put(struct inet6_dev *idev)
210{
211 if (atomic_dec_and_test(&idev->refcnt))
212 in6_dev_finish_destroy(idev);
213}
214
215static inline void __in6_dev_put(struct inet6_dev *idev)
216{
217 atomic_dec(&idev->refcnt);
218}
219
220static inline void in6_dev_hold(struct inet6_dev *idev)
221{
222 atomic_inc(&idev->refcnt);
223}
224
225extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
226
227static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
228{
229 if (atomic_dec_and_test(&ifp->refcnt))
230 inet6_ifa_finish_destroy(ifp);
231}
232
233static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
234{
235 atomic_dec(&ifp->refcnt);
236}
237
238static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
239{
240 atomic_inc(&ifp->refcnt);
241}
242
243
244/*
245 * compute link-local solicited-node multicast address
246 */
247
248static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
249 struct in6_addr *solicited)
250{
251 ipv6_addr_set(solicited,
252 htonl(0xFF020000), 0,
253 htonl(0x1),
254 htonl(0xFF000000) | addr->s6_addr32[3]);
255}
256
257static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
258{
259 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
260}
261
262static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
263{
264 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
265 addr->s6_addr32[1] | addr->s6_addr32[2] |
266 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
267}
268
269static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
270{
271 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
272 addr->s6_addr32[1] | addr->s6_addr32[2] |
273 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
274}
275
276static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
277{
278 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
279}
280
281#ifdef CONFIG_PROC_FS
282extern int if6_proc_init(void);
283extern void if6_proc_exit(void);
284#endif
285
286#endif