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)
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#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1)
19#define ADDRCONF_TIMER_FUZZ (HZ / 4)
20#define ADDRCONF_TIMER_FUZZ_MAX (HZ)
21
22#include <linux/in.h>
23#include <linux/in6.h>
24
25struct prefix_info {
26 __u8 type;
27 __u8 length;
28 __u8 prefix_len;
29
30#if defined(__BIG_ENDIAN_BITFIELD)
31 __u8 onlink : 1,
32 autoconf : 1,
33 reserved : 6;
34#elif defined(__LITTLE_ENDIAN_BITFIELD)
35 __u8 reserved : 6,
36 autoconf : 1,
37 onlink : 1;
38#else
39#error "Please fix <asm/byteorder.h>"
40#endif
41 __be32 valid;
42 __be32 prefered;
43 __be32 reserved2;
44
45 struct in6_addr prefix;
46};
47
48
49#include <linux/netdevice.h>
50#include <net/if_inet6.h>
51#include <net/ipv6.h>
52
53#define IN6_ADDR_HSIZE_SHIFT 4
54#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
55
56int addrconf_init(void);
57void addrconf_cleanup(void);
58
59int addrconf_add_ifaddr(struct net *net, void __user *arg);
60int addrconf_del_ifaddr(struct net *net, void __user *arg);
61int addrconf_set_dstaddr(struct net *net, void __user *arg);
62
63int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
64 const struct net_device *dev, int strict);
65int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
66 const struct net_device *dev, int strict,
67 u32 banned_flags);
68
69#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
70int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
71#endif
72
73bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
74 const unsigned int prefix_len,
75 struct net_device *dev);
76
77int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
78
79struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
80 const struct in6_addr *addr,
81 struct net_device *dev, int strict);
82
83int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
84 const struct in6_addr *daddr, unsigned int srcprefs,
85 struct in6_addr *saddr);
86int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
87 u32 banned_flags);
88int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
89 u32 banned_flags);
90int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2);
91void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
92void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
93
94static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95 unsigned int unit)
96{
97 if (timeout == 0xffffffff)
98 return ~0UL;
99
100
101
102
103
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
118
119int ipv6_addr_label_init(void);
120void ipv6_addr_label_cleanup(void);
121void ipv6_addr_label_rtnl_register(void);
122u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
123 int type, int ifindex);
124
125
126
127
128int ipv6_sock_mc_join(struct sock *sk, int ifindex,
129 const struct in6_addr *addr);
130int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
131 const struct in6_addr *addr);
132void ipv6_sock_mc_close(struct sock *sk);
133bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
134 const struct in6_addr *src_addr);
135
136int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
137int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
138int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
139void ipv6_mc_up(struct inet6_dev *idev);
140void ipv6_mc_down(struct inet6_dev *idev);
141void ipv6_mc_unmap(struct inet6_dev *idev);
142void ipv6_mc_remap(struct inet6_dev *idev);
143void ipv6_mc_init_dev(struct inet6_dev *idev);
144void ipv6_mc_destroy_dev(struct inet6_dev *idev);
145int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
146void addrconf_dad_failure(struct inet6_ifaddr *ifp);
147
148bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
149 const struct in6_addr *src_addr);
150
151void ipv6_mc_dad_complete(struct inet6_dev *idev);
152
153
154
155
156struct ipv6_stub {
157 int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
158 const struct in6_addr *addr);
159 int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
160 const struct in6_addr *addr);
161 int (*ipv6_dst_lookup)(struct sock *sk, struct dst_entry **dst,
162 struct flowi6 *fl6);
163 void (*udpv6_encap_enable)(void);
164 void (*ndisc_send_na)(struct net_device *dev, struct neighbour *neigh,
165 const struct in6_addr *daddr,
166 const struct in6_addr *solicited_addr,
167 bool router, bool solicited, bool override, bool inc_opt);
168 struct neigh_table *nd_tbl;
169};
170extern const struct ipv6_stub *ipv6_stub __read_mostly;
171
172
173
174
175static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
176{
177 struct icmp6hdr *hdr;
178
179 if (nexthdr != IPPROTO_ICMPV6 ||
180 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
181 return false;
182
183 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
184
185 switch (hdr->icmp6_type) {
186 case ICMPV6_MGM_QUERY:
187 case ICMPV6_MGM_REPORT:
188 case ICMPV6_MGM_REDUCTION:
189 case ICMPV6_MLD2_REPORT:
190 return true;
191 default:
192 break;
193 }
194 return false;
195}
196
197void addrconf_prefix_rcv(struct net_device *dev,
198 u8 *opt, int len, bool sllao);
199
200
201
202
203int ipv6_sock_ac_join(struct sock *sk, int ifindex,
204 const struct in6_addr *addr);
205int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
206 const struct in6_addr *addr);
207void ipv6_sock_ac_close(struct sock *sk);
208
209int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
210int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
211void ipv6_ac_destroy_dev(struct inet6_dev *idev);
212bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
213 const struct in6_addr *addr);
214bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
215 const struct in6_addr *addr);
216
217
218int register_inet6addr_notifier(struct notifier_block *nb);
219int unregister_inet6addr_notifier(struct notifier_block *nb);
220int inet6addr_notifier_call_chain(unsigned long val, void *v);
221
222void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
223 struct ipv6_devconf *devconf);
224
225
226
227
228
229
230
231
232static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
233{
234 return rcu_dereference_rtnl(dev->ip6_ptr);
235}
236
237
238
239
240
241
242
243
244
245static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
246{
247 struct inet6_dev *idev;
248
249 rcu_read_lock();
250 idev = rcu_dereference(dev->ip6_ptr);
251 if (idev)
252 atomic_inc(&idev->refcnt);
253 rcu_read_unlock();
254 return idev;
255}
256
257static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
258{
259 struct inet6_dev *idev = __in6_dev_get(dev);
260
261 return idev ? idev->nd_parms : NULL;
262}
263
264void in6_dev_finish_destroy(struct inet6_dev *idev);
265
266static inline void in6_dev_put(struct inet6_dev *idev)
267{
268 if (atomic_dec_and_test(&idev->refcnt))
269 in6_dev_finish_destroy(idev);
270}
271
272static inline void __in6_dev_put(struct inet6_dev *idev)
273{
274 atomic_dec(&idev->refcnt);
275}
276
277static inline void in6_dev_hold(struct inet6_dev *idev)
278{
279 atomic_inc(&idev->refcnt);
280}
281
282void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
283
284static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
285{
286 if (atomic_dec_and_test(&ifp->refcnt))
287 inet6_ifa_finish_destroy(ifp);
288}
289
290static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
291{
292 atomic_dec(&ifp->refcnt);
293}
294
295static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
296{
297 atomic_inc(&ifp->refcnt);
298}
299
300
301
302
303
304
305static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
306 struct in6_addr *solicited)
307{
308 ipv6_addr_set(solicited,
309 htonl(0xFF020000), 0,
310 htonl(0x1),
311 htonl(0xFF000000) | addr->s6_addr32[3]);
312}
313
314static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
315{
316#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
317 __be64 *p = (__be64 *)addr;
318 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
319#else
320 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
321 addr->s6_addr32[1] | addr->s6_addr32[2] |
322 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
323#endif
324}
325
326static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
327{
328#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
329 __be64 *p = (__be64 *)addr;
330 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
331#else
332 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
333 addr->s6_addr32[1] | addr->s6_addr32[2] |
334 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
335#endif
336}
337
338static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
339{
340 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
341}
342
343static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
344{
345#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
346 __be64 *p = (__be64 *)addr;
347 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
348 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
349 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
350#else
351 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
352 addr->s6_addr32[1] |
353 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
354 (addr->s6_addr[12] ^ 0xff)) == 0;
355#endif
356}
357
358#ifdef CONFIG_PROC_FS
359int if6_proc_init(void);
360void if6_proc_exit(void);
361#endif
362
363#endif
364