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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ADDRCONF_H
3#define _ADDRCONF_H
4
5#define MAX_RTR_SOLICITATIONS -1 /* unlimited */
6#define RTR_SOLICITATION_INTERVAL (4*HZ)
7#define RTR_SOLICITATION_MAX_INTERVAL (3600*HZ) /* 1 hour */
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#define ADDRCONF_NOTIFY_PRIORITY 0
23
24#include <linux/in.h>
25#include <linux/in6.h>
26
27struct prefix_info {
28 __u8 type;
29 __u8 length;
30 __u8 prefix_len;
31
32#if defined(__BIG_ENDIAN_BITFIELD)
33 __u8 onlink : 1,
34 autoconf : 1,
35 reserved : 6;
36#elif defined(__LITTLE_ENDIAN_BITFIELD)
37 __u8 reserved : 6,
38 autoconf : 1,
39 onlink : 1;
40#else
41#error "Please fix <asm/byteorder.h>"
42#endif
43 __be32 valid;
44 __be32 prefered;
45 __be32 reserved2;
46
47 struct in6_addr prefix;
48};
49
50#include <linux/ipv6.h>
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 struct netlink_ext_ack *extack;
59};
60
61struct ifa6_config {
62 const struct in6_addr *pfx;
63 unsigned int plen;
64
65 const struct in6_addr *peer_pfx;
66
67 u32 rt_priority;
68 u32 ifa_flags;
69 u32 preferred_lft;
70 u32 valid_lft;
71 u16 scope;
72};
73
74int addrconf_init(void);
75void addrconf_cleanup(void);
76
77int addrconf_add_ifaddr(struct net *net, void __user *arg);
78int addrconf_del_ifaddr(struct net *net, void __user *arg);
79int addrconf_set_dstaddr(struct net *net, void __user *arg);
80
81int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
82 const struct net_device *dev, int strict);
83int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
84 const struct net_device *dev, bool skip_dev_check,
85 int strict, u32 banned_flags);
86
87#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
88int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
89#endif
90
91int ipv6_chk_rpl_srh_loop(struct net *net, const struct in6_addr *segs,
92 unsigned char nsegs);
93
94bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
95 const unsigned int prefix_len,
96 struct net_device *dev);
97
98int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
99
100struct net_device *ipv6_dev_find(struct net *net, const struct in6_addr *addr,
101 struct net_device *dev);
102
103struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
104 const struct in6_addr *addr,
105 struct net_device *dev, int strict);
106
107int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
108 const struct in6_addr *daddr, unsigned int srcprefs,
109 struct in6_addr *saddr);
110int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
111 u32 banned_flags);
112int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
113 u32 banned_flags);
114bool inet_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
115 bool match_wildcard);
116bool inet_rcv_saddr_any(const struct sock *sk);
117void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
118void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
119
120void addrconf_add_linklocal(struct inet6_dev *idev,
121 const struct in6_addr *addr, u32 flags);
122
123int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
124 const struct prefix_info *pinfo,
125 struct inet6_dev *in6_dev,
126 const struct in6_addr *addr, int addr_type,
127 u32 addr_flags, bool sllao, bool tokenized,
128 __u32 valid_lft, u32 prefered_lft);
129
130static inline void addrconf_addr_eui48_base(u8 *eui, const char *const addr)
131{
132 memcpy(eui, addr, 3);
133 eui[3] = 0xFF;
134 eui[4] = 0xFE;
135 memcpy(eui + 5, addr + 3, 3);
136}
137
138static inline void addrconf_addr_eui48(u8 *eui, const char *const addr)
139{
140 addrconf_addr_eui48_base(eui, addr);
141 eui[0] ^= 2;
142}
143
144static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
145{
146 if (dev->addr_len != ETH_ALEN)
147 return -1;
148
149 /*
150 * The zSeries OSA network cards can be shared among various
151 * OS instances, but the OSA cards have only one MAC address.
152 * This leads to duplicate address conflicts in conjunction
153 * with IPv6 if more than one instance uses the same card.
154 *
155 * The driver for these cards can deliver a unique 16-bit
156 * identifier for each instance sharing the same card. It is
157 * placed instead of 0xFFFE in the interface identifier. The
158 * "u" bit of the interface identifier is not inverted in this
159 * case. Hence the resulting interface identifier has local
160 * scope according to RFC2373.
161 */
162
163 addrconf_addr_eui48_base(eui, dev->dev_addr);
164
165 if (dev->dev_id) {
166 eui[3] = (dev->dev_id >> 8) & 0xFF;
167 eui[4] = dev->dev_id & 0xFF;
168 } else {
169 eui[0] ^= 2;
170 }
171
172 return 0;
173}
174
175static inline unsigned long addrconf_timeout_fixup(u32 timeout,
176 unsigned int unit)
177{
178 if (timeout == 0xffffffff)
179 return ~0UL;
180
181 /*
182 * Avoid arithmetic overflow.
183 * Assuming unit is constant and non-zero, this "if" statement
184 * will go away on 64bit archs.
185 */
186 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
187 return LONG_MAX / unit;
188
189 return timeout;
190}
191
192static inline int addrconf_finite_timeout(unsigned long timeout)
193{
194 return ~timeout;
195}
196
197/*
198 * IPv6 Address Label subsystem (addrlabel.c)
199 */
200int ipv6_addr_label_init(void);
201void ipv6_addr_label_cleanup(void);
202int ipv6_addr_label_rtnl_register(void);
203u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
204 int type, int ifindex);
205
206/*
207 * multicast prototypes (mcast.c)
208 */
209static inline bool ipv6_mc_may_pull(struct sk_buff *skb,
210 unsigned int len)
211{
212 if (skb_transport_offset(skb) + ipv6_transport_len(skb) < len)
213 return false;
214
215 return pskb_may_pull(skb, len);
216}
217
218int ipv6_sock_mc_join(struct sock *sk, int ifindex,
219 const struct in6_addr *addr);
220int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
221 const struct in6_addr *addr);
222void __ipv6_sock_mc_close(struct sock *sk);
223void ipv6_sock_mc_close(struct sock *sk);
224bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
225 const struct in6_addr *src_addr);
226
227int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
228int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
229int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
230void ipv6_mc_up(struct inet6_dev *idev);
231void ipv6_mc_down(struct inet6_dev *idev);
232void ipv6_mc_unmap(struct inet6_dev *idev);
233void ipv6_mc_remap(struct inet6_dev *idev);
234void ipv6_mc_init_dev(struct inet6_dev *idev);
235void ipv6_mc_destroy_dev(struct inet6_dev *idev);
236int ipv6_mc_check_mld(struct sk_buff *skb);
237void addrconf_dad_failure(struct sk_buff *skb, struct inet6_ifaddr *ifp);
238
239bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
240 const struct in6_addr *src_addr);
241
242void ipv6_mc_dad_complete(struct inet6_dev *idev);
243
244/*
245 * identify MLD packets for MLD filter exceptions
246 */
247static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
248{
249 struct icmp6hdr *hdr;
250
251 if (nexthdr != IPPROTO_ICMPV6 ||
252 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
253 return false;
254
255 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
256
257 switch (hdr->icmp6_type) {
258 case ICMPV6_MGM_QUERY:
259 case ICMPV6_MGM_REPORT:
260 case ICMPV6_MGM_REDUCTION:
261 case ICMPV6_MLD2_REPORT:
262 return true;
263 default:
264 break;
265 }
266 return false;
267}
268
269void addrconf_prefix_rcv(struct net_device *dev,
270 u8 *opt, int len, bool sllao);
271
272/*
273 * anycast prototypes (anycast.c)
274 */
275int ipv6_sock_ac_join(struct sock *sk, int ifindex,
276 const struct in6_addr *addr);
277int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
278 const struct in6_addr *addr);
279void __ipv6_sock_ac_close(struct sock *sk);
280void ipv6_sock_ac_close(struct sock *sk);
281
282int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
283int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
284void ipv6_ac_destroy_dev(struct inet6_dev *idev);
285bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
286 const struct in6_addr *addr);
287bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
288 const struct in6_addr *addr);
289int ipv6_anycast_init(void);
290void ipv6_anycast_cleanup(void);
291
292/* Device notifier */
293int register_inet6addr_notifier(struct notifier_block *nb);
294int unregister_inet6addr_notifier(struct notifier_block *nb);
295int inet6addr_notifier_call_chain(unsigned long val, void *v);
296
297int register_inet6addr_validator_notifier(struct notifier_block *nb);
298int unregister_inet6addr_validator_notifier(struct notifier_block *nb);
299int inet6addr_validator_notifier_call_chain(unsigned long val, void *v);
300
301void inet6_netconf_notify_devconf(struct net *net, int event, int type,
302 int ifindex, struct ipv6_devconf *devconf);
303
304/**
305 * __in6_dev_get - get inet6_dev pointer from netdevice
306 * @dev: network device
307 *
308 * Caller must hold rcu_read_lock or RTNL, because this function
309 * does not take a reference on the inet6_dev.
310 */
311static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
312{
313 return rcu_dereference_rtnl(dev->ip6_ptr);
314}
315
316/**
317 * __in6_dev_stats_get - get inet6_dev pointer for stats
318 * @dev: network device
319 * @skb: skb for original incoming interface if neeeded
320 *
321 * Caller must hold rcu_read_lock or RTNL, because this function
322 * does not take a reference on the inet6_dev.
323 */
324static inline struct inet6_dev *__in6_dev_stats_get(const struct net_device *dev,
325 const struct sk_buff *skb)
326{
327 if (netif_is_l3_master(dev))
328 dev = dev_get_by_index_rcu(dev_net(dev), inet6_iif(skb));
329 return __in6_dev_get(dev);
330}
331
332/**
333 * __in6_dev_get_safely - get inet6_dev pointer from netdevice
334 * @dev: network device
335 *
336 * This is a safer version of __in6_dev_get
337 */
338static inline struct inet6_dev *__in6_dev_get_safely(const struct net_device *dev)
339{
340 if (likely(dev))
341 return rcu_dereference_rtnl(dev->ip6_ptr);
342 else
343 return NULL;
344}
345
346/**
347 * in6_dev_get - get inet6_dev pointer from netdevice
348 * @dev: network device
349 *
350 * This version can be used in any context, and takes a reference
351 * on the inet6_dev. Callers must use in6_dev_put() later to
352 * release this reference.
353 */
354static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
355{
356 struct inet6_dev *idev;
357
358 rcu_read_lock();
359 idev = rcu_dereference(dev->ip6_ptr);
360 if (idev)
361 refcount_inc(&idev->refcnt);
362 rcu_read_unlock();
363 return idev;
364}
365
366static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
367{
368 struct inet6_dev *idev = __in6_dev_get(dev);
369
370 return idev ? idev->nd_parms : NULL;
371}
372
373void in6_dev_finish_destroy(struct inet6_dev *idev);
374
375static inline void in6_dev_put(struct inet6_dev *idev)
376{
377 if (refcount_dec_and_test(&idev->refcnt))
378 in6_dev_finish_destroy(idev);
379}
380
381static inline void in6_dev_put_clear(struct inet6_dev **pidev)
382{
383 struct inet6_dev *idev = *pidev;
384
385 if (idev) {
386 in6_dev_put(idev);
387 *pidev = NULL;
388 }
389}
390
391static inline void __in6_dev_put(struct inet6_dev *idev)
392{
393 refcount_dec(&idev->refcnt);
394}
395
396static inline void in6_dev_hold(struct inet6_dev *idev)
397{
398 refcount_inc(&idev->refcnt);
399}
400
401/* called with rcu_read_lock held */
402static inline bool ip6_ignore_linkdown(const struct net_device *dev)
403{
404 const struct inet6_dev *idev = __in6_dev_get(dev);
405
406 return !!idev->cnf.ignore_routes_with_linkdown;
407}
408
409void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
410
411static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
412{
413 if (refcount_dec_and_test(&ifp->refcnt))
414 inet6_ifa_finish_destroy(ifp);
415}
416
417static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
418{
419 refcount_dec(&ifp->refcnt);
420}
421
422static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
423{
424 refcount_inc(&ifp->refcnt);
425}
426
427
428/*
429 * compute link-local solicited-node multicast address
430 */
431
432static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
433 struct in6_addr *solicited)
434{
435 ipv6_addr_set(solicited,
436 htonl(0xFF020000), 0,
437 htonl(0x1),
438 htonl(0xFF000000) | addr->s6_addr32[3]);
439}
440
441static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
442{
443#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
444 __be64 *p = (__force __be64 *)addr;
445 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
446#else
447 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
448 addr->s6_addr32[1] | addr->s6_addr32[2] |
449 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
450#endif
451}
452
453static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
454{
455#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
456 __be64 *p = (__force __be64 *)addr;
457 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
458#else
459 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
460 addr->s6_addr32[1] | addr->s6_addr32[2] |
461 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
462#endif
463}
464
465static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
466{
467 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
468}
469
470static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
471{
472#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
473 __be64 *p = (__force __be64 *)addr;
474 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
475 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
476 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
477#else
478 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
479 addr->s6_addr32[1] |
480 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
481 (addr->s6_addr[12] ^ 0xff)) == 0;
482#endif
483}
484
485static inline bool ipv6_addr_is_all_snoopers(const struct in6_addr *addr)
486{
487#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
488 __be64 *p = (__force __be64 *)addr;
489
490 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
491 (p[1] ^ cpu_to_be64(0x6a))) == 0UL;
492#else
493 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
494 addr->s6_addr32[1] | addr->s6_addr32[2] |
495 (addr->s6_addr32[3] ^ htonl(0x0000006a))) == 0;
496#endif
497}
498
499#ifdef CONFIG_PROC_FS
500int if6_proc_init(void);
501void if6_proc_exit(void);
502#endif
503
504#endif
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#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, u8 *opt, int len);
155
156/*
157 * anycast prototypes (anycast.c)
158 */
159extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr);
160extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr);
161extern void ipv6_sock_ac_close(struct sock *sk);
162extern int inet6_ac_check(struct sock *sk, const struct in6_addr *addr, int ifindex);
163
164extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
165extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
166extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
167 const struct in6_addr *addr);
168
169
170/* Device notifier */
171extern int register_inet6addr_notifier(struct notifier_block *nb);
172extern int unregister_inet6addr_notifier(struct notifier_block *nb);
173
174/**
175 * __in6_dev_get - get inet6_dev pointer from netdevice
176 * @dev: network device
177 *
178 * Caller must hold rcu_read_lock or RTNL, because this function
179 * does not take a reference on the inet6_dev.
180 */
181static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
182{
183 return rcu_dereference_rtnl(dev->ip6_ptr);
184}
185
186/**
187 * in6_dev_get - get inet6_dev pointer from netdevice
188 * @dev: network device
189 *
190 * This version can be used in any context, and takes a reference
191 * on the inet6_dev. Callers must use in6_dev_put() later to
192 * release this reference.
193 */
194static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
195{
196 struct inet6_dev *idev;
197
198 rcu_read_lock();
199 idev = rcu_dereference(dev->ip6_ptr);
200 if (idev)
201 atomic_inc(&idev->refcnt);
202 rcu_read_unlock();
203 return idev;
204}
205
206extern void in6_dev_finish_destroy(struct inet6_dev *idev);
207
208static inline void in6_dev_put(struct inet6_dev *idev)
209{
210 if (atomic_dec_and_test(&idev->refcnt))
211 in6_dev_finish_destroy(idev);
212}
213
214static inline void __in6_dev_put(struct inet6_dev *idev)
215{
216 atomic_dec(&idev->refcnt);
217}
218
219static inline void in6_dev_hold(struct inet6_dev *idev)
220{
221 atomic_inc(&idev->refcnt);
222}
223
224extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
225
226static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
227{
228 if (atomic_dec_and_test(&ifp->refcnt))
229 inet6_ifa_finish_destroy(ifp);
230}
231
232static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
233{
234 atomic_dec(&ifp->refcnt);
235}
236
237static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
238{
239 atomic_inc(&ifp->refcnt);
240}
241
242
243/*
244 * compute link-local solicited-node multicast address
245 */
246
247static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
248 struct in6_addr *solicited)
249{
250 ipv6_addr_set(solicited,
251 htonl(0xFF020000), 0,
252 htonl(0x1),
253 htonl(0xFF000000) | addr->s6_addr32[3]);
254}
255
256static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
257{
258 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
259}
260
261static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
262{
263 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
264 addr->s6_addr32[1] | addr->s6_addr32[2] |
265 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
266}
267
268static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
269{
270 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
271 addr->s6_addr32[1] | addr->s6_addr32[2] |
272 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
273}
274
275static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
276{
277 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
278}
279
280#ifdef CONFIG_PROC_FS
281extern int if6_proc_init(void);
282extern void if6_proc_exit(void);
283#endif
284
285#endif