1#ifndef _ADDRCONF_H
2#define _ADDRCONF_H
3
4#define MAX_RTR_SOLICITATIONS -1
5#define RTR_SOLICITATION_INTERVAL (4*HZ)
6#define RTR_SOLICITATION_MAX_INTERVAL (3600*HZ)
7
8#define MIN_VALID_LIFETIME (2*3600)
9
10#define TEMP_VALID_LIFETIME (7*86400)
11#define TEMP_PREFERRED_LIFETIME (86400)
12#define REGEN_MAX_RETRY (3)
13#define MAX_DESYNC_FACTOR (600)
14
15#define ADDR_CHECK_FREQUENCY (120*HZ)
16
17#define IPV6_MAX_ADDRESSES 16
18
19#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1)
20#define ADDRCONF_TIMER_FUZZ (HZ / 4)
21#define ADDRCONF_TIMER_FUZZ_MAX (HZ)
22
23#define ADDRCONF_NOTIFY_PRIORITY 0
24
25#include <linux/in.h>
26#include <linux/in6.h>
27
28struct prefix_info {
29 __u8 type;
30 __u8 length;
31 __u8 prefix_len;
32
33#if defined(__BIG_ENDIAN_BITFIELD)
34 __u8 onlink : 1,
35 autoconf : 1,
36 reserved : 6;
37#elif defined(__LITTLE_ENDIAN_BITFIELD)
38 __u8 reserved : 6,
39 autoconf : 1,
40 onlink : 1;
41#else
42#error "Please fix <asm/byteorder.h>"
43#endif
44 __be32 valid;
45 __be32 prefered;
46 __be32 reserved2;
47
48 struct in6_addr prefix;
49};
50
51#include <linux/netdevice.h>
52#include <net/if_inet6.h>
53#include <net/ipv6.h>
54
55struct in6_validator_info {
56 struct in6_addr i6vi_addr;
57 struct inet6_dev *i6vi_dev;
58};
59
60#define IN6_ADDR_HSIZE_SHIFT 4
61#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
62
63int addrconf_init(void);
64void addrconf_cleanup(void);
65
66int addrconf_add_ifaddr(struct net *net, void __user *arg);
67int addrconf_del_ifaddr(struct net *net, void __user *arg);
68int addrconf_set_dstaddr(struct net *net, void __user *arg);
69
70int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
71 const struct net_device *dev, int strict);
72int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
73 const struct net_device *dev, int strict,
74 u32 banned_flags);
75
76#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
77int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
78#endif
79
80bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
81 const unsigned int prefix_len,
82 struct net_device *dev);
83
84int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
85
86struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
87 const struct in6_addr *addr,
88 struct net_device *dev, int strict);
89
90int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
91 const struct in6_addr *daddr, unsigned int srcprefs,
92 struct in6_addr *saddr);
93int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
94 u32 banned_flags);
95int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
96 u32 banned_flags);
97int inet_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
98 bool match_wildcard);
99void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
100void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
101
102void addrconf_add_linklocal(struct inet6_dev *idev,
103 const struct in6_addr *addr, u32 flags);
104
105int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
106 const struct prefix_info *pinfo,
107 struct inet6_dev *in6_dev,
108 const struct in6_addr *addr, int addr_type,
109 u32 addr_flags, bool sllao, bool tokenized,
110 __u32 valid_lft, u32 prefered_lft);
111
112static inline void addrconf_addr_eui48_base(u8 *eui, const char *const addr)
113{
114 memcpy(eui, addr, 3);
115 eui[3] = 0xFF;
116 eui[4] = 0xFE;
117 memcpy(eui + 5, addr + 3, 3);
118}
119
120static inline void addrconf_addr_eui48(u8 *eui, const char *const addr)
121{
122 addrconf_addr_eui48_base(eui, addr);
123 eui[0] ^= 2;
124}
125
126static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
127{
128 if (dev->addr_len != ETH_ALEN)
129 return -1;
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145 addrconf_addr_eui48_base(eui, dev->dev_addr);
146
147 if (dev->dev_id) {
148 eui[3] = (dev->dev_id >> 8) & 0xFF;
149 eui[4] = dev->dev_id & 0xFF;
150 } else {
151 eui[0] ^= 2;
152 }
153
154 return 0;
155}
156
157static inline unsigned long addrconf_timeout_fixup(u32 timeout,
158 unsigned int unit)
159{
160 if (timeout == 0xffffffff)
161 return ~0UL;
162
163
164
165
166
167
168 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
169 return LONG_MAX / unit;
170
171 return timeout;
172}
173
174static inline int addrconf_finite_timeout(unsigned long timeout)
175{
176 return ~timeout;
177}
178
179
180
181
182int ipv6_addr_label_init(void);
183void ipv6_addr_label_cleanup(void);
184void ipv6_addr_label_rtnl_register(void);
185u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
186 int type, int ifindex);
187
188
189
190
191int ipv6_sock_mc_join(struct sock *sk, int ifindex,
192 const struct in6_addr *addr);
193int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
194 const struct in6_addr *addr);
195void __ipv6_sock_mc_close(struct sock *sk);
196void ipv6_sock_mc_close(struct sock *sk);
197bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
198 const struct in6_addr *src_addr);
199
200int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
201int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
202int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
203void ipv6_mc_up(struct inet6_dev *idev);
204void ipv6_mc_down(struct inet6_dev *idev);
205void ipv6_mc_unmap(struct inet6_dev *idev);
206void ipv6_mc_remap(struct inet6_dev *idev);
207void ipv6_mc_init_dev(struct inet6_dev *idev);
208void ipv6_mc_destroy_dev(struct inet6_dev *idev);
209int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
210void addrconf_dad_failure(struct inet6_ifaddr *ifp);
211
212bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
213 const struct in6_addr *src_addr);
214
215void ipv6_mc_dad_complete(struct inet6_dev *idev);
216
217
218
219
220struct ipv6_stub {
221 int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
222 const struct in6_addr *addr);
223 int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
224 const struct in6_addr *addr);
225 int (*ipv6_dst_lookup)(struct net *net, struct sock *sk,
226 struct dst_entry **dst, struct flowi6 *fl6);
227 void (*udpv6_encap_enable)(void);
228 void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
229 const struct in6_addr *solicited_addr,
230 bool router, bool solicited, bool override, bool inc_opt);
231 struct neigh_table *nd_tbl;
232};
233extern const struct ipv6_stub *ipv6_stub __read_mostly;
234
235
236
237
238static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
239{
240 struct icmp6hdr *hdr;
241
242 if (nexthdr != IPPROTO_ICMPV6 ||
243 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
244 return false;
245
246 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
247
248 switch (hdr->icmp6_type) {
249 case ICMPV6_MGM_QUERY:
250 case ICMPV6_MGM_REPORT:
251 case ICMPV6_MGM_REDUCTION:
252 case ICMPV6_MLD2_REPORT:
253 return true;
254 default:
255 break;
256 }
257 return false;
258}
259
260void addrconf_prefix_rcv(struct net_device *dev,
261 u8 *opt, int len, bool sllao);
262
263
264
265
266int ipv6_sock_ac_join(struct sock *sk, int ifindex,
267 const struct in6_addr *addr);
268int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
269 const struct in6_addr *addr);
270void ipv6_sock_ac_close(struct sock *sk);
271
272int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
273int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
274void ipv6_ac_destroy_dev(struct inet6_dev *idev);
275bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
276 const struct in6_addr *addr);
277bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
278 const struct in6_addr *addr);
279
280
281int register_inet6addr_notifier(struct notifier_block *nb);
282int unregister_inet6addr_notifier(struct notifier_block *nb);
283int inet6addr_notifier_call_chain(unsigned long val, void *v);
284
285int register_inet6addr_validator_notifier(struct notifier_block *nb);
286int unregister_inet6addr_validator_notifier(struct notifier_block *nb);
287int inet6addr_validator_notifier_call_chain(unsigned long val, void *v);
288
289void inet6_netconf_notify_devconf(struct net *net, int event, int type,
290 int ifindex, struct ipv6_devconf *devconf);
291
292
293
294
295
296
297
298
299static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
300{
301 return rcu_dereference_rtnl(dev->ip6_ptr);
302}
303
304
305
306
307
308
309
310
311
312static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
313{
314 struct inet6_dev *idev;
315
316 rcu_read_lock();
317 idev = rcu_dereference(dev->ip6_ptr);
318 if (idev)
319 refcount_inc(&idev->refcnt);
320 rcu_read_unlock();
321 return idev;
322}
323
324static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
325{
326 struct inet6_dev *idev = __in6_dev_get(dev);
327
328 return idev ? idev->nd_parms : NULL;
329}
330
331void in6_dev_finish_destroy(struct inet6_dev *idev);
332
333static inline void in6_dev_put(struct inet6_dev *idev)
334{
335 if (refcount_dec_and_test(&idev->refcnt))
336 in6_dev_finish_destroy(idev);
337}
338
339static inline void in6_dev_put_clear(struct inet6_dev **pidev)
340{
341 struct inet6_dev *idev = *pidev;
342
343 if (idev) {
344 in6_dev_put(idev);
345 *pidev = NULL;
346 }
347}
348
349static inline void __in6_dev_put(struct inet6_dev *idev)
350{
351 refcount_dec(&idev->refcnt);
352}
353
354static inline void in6_dev_hold(struct inet6_dev *idev)
355{
356 refcount_inc(&idev->refcnt);
357}
358
359void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
360
361static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
362{
363 if (refcount_dec_and_test(&ifp->refcnt))
364 inet6_ifa_finish_destroy(ifp);
365}
366
367static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
368{
369 refcount_dec(&ifp->refcnt);
370}
371
372static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
373{
374 refcount_inc(&ifp->refcnt);
375}
376
377
378
379
380
381
382static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
383 struct in6_addr *solicited)
384{
385 ipv6_addr_set(solicited,
386 htonl(0xFF020000), 0,
387 htonl(0x1),
388 htonl(0xFF000000) | addr->s6_addr32[3]);
389}
390
391static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
392{
393#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
394 __be64 *p = (__be64 *)addr;
395 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
396#else
397 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
398 addr->s6_addr32[1] | addr->s6_addr32[2] |
399 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
400#endif
401}
402
403static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
404{
405#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
406 __be64 *p = (__be64 *)addr;
407 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
408#else
409 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
410 addr->s6_addr32[1] | addr->s6_addr32[2] |
411 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
412#endif
413}
414
415static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
416{
417 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
418}
419
420static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
421{
422#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
423 __be64 *p = (__be64 *)addr;
424 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
425 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
426 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
427#else
428 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
429 addr->s6_addr32[1] |
430 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
431 (addr->s6_addr[12] ^ 0xff)) == 0;
432#endif
433}
434
435#ifdef CONFIG_PROC_FS
436int if6_proc_init(void);
437void if6_proc_exit(void);
438#endif
439
440#endif
441