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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _ADDRCONF_H
2#define _ADDRCONF_H
3
Maciej Żenczykowskibd11f072016-09-27 23:57:58 -07004#define MAX_RTR_SOLICITATIONS -1 /* unlimited */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005#define RTR_SOLICITATION_INTERVAL (4*HZ)
Maciej Żenczykowskibd11f072016-09-27 23:57:58 -07006#define RTR_SOLICITATION_MAX_INTERVAL (3600*HZ) /* 1 hour */
Linus Torvalds1da177e2005-04-16 15:20:36 -07007
8#define MIN_VALID_LIFETIME (2*3600) /* 2 hours */
9
10#define TEMP_VALID_LIFETIME (7*86400)
11#define TEMP_PREFERRED_LIFETIME (86400)
Lorenzo Colitti76f793e2011-07-26 13:50:49 +000012#define REGEN_MAX_RETRY (3)
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#define MAX_DESYNC_FACTOR (600)
14
15#define ADDR_CHECK_FREQUENCY (120*HZ)
16
17#define IPV6_MAX_ADDRESSES 16
18
Jiri Pirko5c766d62013-01-24 09:41:41 +000019#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
Fred L. Templinc7dc89c2007-11-29 22:11:40 +110023#include <linux/in.h>
Patrick McHardy6a800d42005-05-03 22:17:18 -070024#include <linux/in6.h>
25
Linus Torvalds1da177e2005-04-16 15:20:36 -070026struct prefix_info {
27 __u8 type;
28 __u8 length;
29 __u8 prefix_len;
30
31#if defined(__BIG_ENDIAN_BITFIELD)
32 __u8 onlink : 1,
33 autoconf : 1,
34 reserved : 6;
35#elif defined(__LITTLE_ENDIAN_BITFIELD)
36 __u8 reserved : 6,
37 autoconf : 1,
38 onlink : 1;
39#else
40#error "Please fix <asm/byteorder.h>"
41#endif
Al Viroe69a4adc2006-11-14 20:56:00 -080042 __be32 valid;
43 __be32 prefered;
44 __be32 reserved2;
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
46 struct in6_addr prefix;
47};
48
49
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#include <linux/netdevice.h>
51#include <net/if_inet6.h>
Herbert Xue4553ed2005-05-03 14:25:13 -070052#include <net/ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
Eric Dumazetddbe5032012-07-18 08:11:12 +000054#define IN6_ADDR_HSIZE_SHIFT 4
55#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
Joe Perchese8e54d32013-07-31 17:31:32 -070057int addrconf_init(void);
58void addrconf_cleanup(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
Joe Perchese8e54d32013-07-31 17:31:32 -070060int addrconf_add_ifaddr(struct net *net, void __user *arg);
61int addrconf_del_ifaddr(struct net *net, void __user *arg);
62int addrconf_set_dstaddr(struct net *net, void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
Joe Perchese8e54d32013-07-31 17:31:32 -070064int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
65 const struct net_device *dev, int strict);
Erik Klinec58da4c2015-02-04 20:01:23 +090066int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
67 const struct net_device *dev, int strict,
68 u32 banned_flags);
Daniel Lezcanobfeade02008-01-10 22:43:18 -080069
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -070070#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
Joe Perchese8e54d32013-07-31 17:31:32 -070071int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
Masahide NAKAMURA65d4ed92006-08-23 19:16:22 -070072#endif
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -040073
Catalin\(ux\) M. BOIE7df37ff2013-09-23 23:04:19 +030074bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
75 const unsigned int prefix_len,
76 struct net_device *dev);
77
Joe Perchese8e54d32013-07-31 17:31:32 -070078int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -040079
Joe Perchese8e54d32013-07-31 17:31:32 -070080struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
81 const struct in6_addr *addr,
82 struct net_device *dev, int strict);
Daniel Lezcano1cab3da2008-01-10 22:44:09 -080083
Joe Perchese8e54d32013-07-31 17:31:32 -070084int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
85 const struct in6_addr *daddr, unsigned int srcprefs,
86 struct in6_addr *saddr);
87int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
Jiri Pirko479840f2013-12-06 09:45:21 +010088 u32 banned_flags);
Joe Perchese8e54d32013-07-31 17:31:32 -070089int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
Jiri Pirko479840f2013-12-06 09:45:21 +010090 u32 banned_flags);
Craig Galleka5836362016-02-10 11:50:38 -050091int ipv4_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
92 bool match_wildcard);
Craig Galleke32ea7e2016-01-04 17:41:46 -050093int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
94 bool match_wildcard);
Joe Perchese8e54d32013-07-31 17:31:32 -070095void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
96void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
Alexander Aring2ad3ed52016-06-15 21:20:17 +020098void addrconf_add_linklocal(struct inet6_dev *idev,
99 const struct in6_addr *addr, u32 flags);
100
Alexander Aringcc84b3c2016-06-15 21:20:24 +0200101int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
102 const struct prefix_info *pinfo,
103 struct inet6_dev *in6_dev,
104 const struct in6_addr *addr, int addr_type,
105 u32 addr_flags, bool sllao, bool tokenized,
106 __u32 valid_lft, u32 prefered_lft);
107
Matan Barak399e6f92015-07-30 18:33:22 +0300108static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
109{
110 if (dev->addr_len != ETH_ALEN)
111 return -1;
112 memcpy(eui, dev->dev_addr, 3);
113 memcpy(eui + 5, dev->dev_addr + 3, 3);
114
115 /*
116 * The zSeries OSA network cards can be shared among various
117 * OS instances, but the OSA cards have only one MAC address.
118 * This leads to duplicate address conflicts in conjunction
119 * with IPv6 if more than one instance uses the same card.
120 *
121 * The driver for these cards can deliver a unique 16-bit
122 * identifier for each instance sharing the same card. It is
123 * placed instead of 0xFFFE in the interface identifier. The
124 * "u" bit of the interface identifier is not inverted in this
125 * case. Hence the resulting interface identifier has local
126 * scope according to RFC2373.
127 */
128 if (dev->dev_id) {
129 eui[3] = (dev->dev_id >> 8) & 0xFF;
130 eui[4] = dev->dev_id & 0xFF;
131 } else {
132 eui[3] = 0xFF;
133 eui[4] = 0xFE;
134 eui[0] ^= 2;
135 }
136 return 0;
137}
138
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +0900139static inline unsigned long addrconf_timeout_fixup(u32 timeout,
Eric Dumazet95c96172012-04-15 05:58:06 +0000140 unsigned int unit)
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +0900141{
142 if (timeout == 0xffffffff)
143 return ~0UL;
144
145 /*
146 * Avoid arithmetic overflow.
147 * Assuming unit is constant and non-zero, this "if" statement
148 * will go away on 64bit archs.
149 */
150 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
151 return LONG_MAX / unit;
152
153 return timeout;
154}
155
156static inline int addrconf_finite_timeout(unsigned long timeout)
157{
158 return ~timeout;
159}
160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161/*
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900162 * IPv6 Address Label subsystem (addrlabel.c)
163 */
Joe Perchese8e54d32013-07-31 17:31:32 -0700164int ipv6_addr_label_init(void);
165void ipv6_addr_label_cleanup(void);
166void ipv6_addr_label_rtnl_register(void);
167u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
168 int type, int ifindex);
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900169
170/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 * multicast prototypes (mcast.c)
172 */
Joe Perchese8e54d32013-07-31 17:31:32 -0700173int ipv6_sock_mc_join(struct sock *sk, int ifindex,
174 const struct in6_addr *addr);
175int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
176 const struct in6_addr *addr);
177void ipv6_sock_mc_close(struct sock *sk);
178bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
179 const struct in6_addr *src_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
Joe Perchese8e54d32013-07-31 17:31:32 -0700181int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
182int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
183int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
184void ipv6_mc_up(struct inet6_dev *idev);
185void ipv6_mc_down(struct inet6_dev *idev);
186void ipv6_mc_unmap(struct inet6_dev *idev);
187void ipv6_mc_remap(struct inet6_dev *idev);
188void ipv6_mc_init_dev(struct inet6_dev *idev);
189void ipv6_mc_destroy_dev(struct inet6_dev *idev);
Linus Lüssing9afd85c2015-05-02 14:01:07 +0200190int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
Joe Perchese8e54d32013-07-31 17:31:32 -0700191void addrconf_dad_failure(struct inet6_ifaddr *ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
Joe Perchese8e54d32013-07-31 17:31:32 -0700193bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
194 const struct in6_addr *src_addr);
YOSHIFUJI Hideaki / 吉藤英明daad1512013-01-13 05:02:18 +0000195
Joe Perchese8e54d32013-07-31 17:31:32 -0700196void ipv6_mc_dad_complete(struct inet6_dev *idev);
Cong Wang5f81bd22013-08-31 13:44:30 +0800197
198/* A stub used by vxlan module. This is ugly, ideally these
199 * symbols should be built into the core kernel.
200 */
201struct ipv6_stub {
202 int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
203 const struct in6_addr *addr);
204 int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
205 const struct in6_addr *addr);
Roopa Prabhu343d60a2015-07-30 13:34:53 -0700206 int (*ipv6_dst_lookup)(struct net *net, struct sock *sk,
207 struct dst_entry **dst, struct flowi6 *fl6);
Cong Wang5f81bd22013-08-31 13:44:30 +0800208 void (*udpv6_encap_enable)(void);
Jiri Benc38cf5952015-09-22 18:57:13 +0200209 void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
Cong Wangf564f452013-08-31 13:44:36 +0800210 const struct in6_addr *solicited_addr,
211 bool router, bool solicited, bool override, bool inc_opt);
Cong Wange15a00a2013-08-31 13:44:34 +0800212 struct neigh_table *nd_tbl;
Cong Wang5f81bd22013-08-31 13:44:30 +0800213};
214extern const struct ipv6_stub *ipv6_stub __read_mostly;
215
YOSHIFUJI Hideaki / 吉藤英明daad1512013-01-13 05:02:18 +0000216/*
217 * identify MLD packets for MLD filter exceptions
218 */
219static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
220{
221 struct icmp6hdr *hdr;
222
223 if (nexthdr != IPPROTO_ICMPV6 ||
224 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
225 return false;
226
227 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
228
229 switch (hdr->icmp6_type) {
230 case ICMPV6_MGM_QUERY:
231 case ICMPV6_MGM_REPORT:
232 case ICMPV6_MGM_REDUCTION:
233 case ICMPV6_MLD2_REPORT:
234 return true;
235 default:
236 break;
237 }
238 return false;
239}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
Joe Perchese8e54d32013-07-31 17:31:32 -0700241void addrconf_prefix_rcv(struct net_device *dev,
242 u8 *opt, int len, bool sllao);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244/*
245 * anycast prototypes (anycast.c)
246 */
Joe Perchese8e54d32013-07-31 17:31:32 -0700247int ipv6_sock_ac_join(struct sock *sk, int ifindex,
248 const struct in6_addr *addr);
249int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
250 const struct in6_addr *addr);
251void ipv6_sock_ac_close(struct sock *sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
WANG Cong013b4d92014-09-11 15:35:11 -0700253int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
Joe Perchese8e54d32013-07-31 17:31:32 -0700254int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
Sabrina Dubroca381f4dc2014-09-10 23:23:02 +0200255void ipv6_ac_destroy_dev(struct inet6_dev *idev);
Joe Perchese8e54d32013-07-31 17:31:32 -0700256bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
FX Le Bail7c90cc22014-01-22 07:42:37 +0100257 const struct in6_addr *addr);
258bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
259 const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
261/* Device notifier */
Joe Perchese8e54d32013-07-31 17:31:32 -0700262int register_inet6addr_notifier(struct notifier_block *nb);
263int unregister_inet6addr_notifier(struct notifier_block *nb);
264int inet6addr_notifier_call_chain(unsigned long val, void *v);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265
Joe Perchese8e54d32013-07-31 17:31:32 -0700266void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
267 struct ipv6_devconf *devconf);
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000268
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000269/**
270 * __in6_dev_get - get inet6_dev pointer from netdevice
271 * @dev: network device
272 *
273 * Caller must hold rcu_read_lock or RTNL, because this function
274 * does not take a reference on the inet6_dev.
275 */
276static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000278 return rcu_dereference_rtnl(dev->ip6_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279}
280
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000281/**
282 * in6_dev_get - get inet6_dev pointer from netdevice
283 * @dev: network device
284 *
285 * This version can be used in any context, and takes a reference
286 * on the inet6_dev. Callers must use in6_dev_put() later to
287 * release this reference.
288 */
289static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000291 struct inet6_dev *idev;
292
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700293 rcu_read_lock();
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000294 idev = rcu_dereference(dev->ip6_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 if (idev)
296 atomic_inc(&idev->refcnt);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700297 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 return idev;
299}
300
Jiri Pirkobba24892013-12-07 19:26:57 +0100301static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
302{
303 struct inet6_dev *idev = __in6_dev_get(dev);
304
305 return idev ? idev->nd_parms : NULL;
306}
307
Joe Perchese8e54d32013-07-31 17:31:32 -0700308void in6_dev_finish_destroy(struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000310static inline void in6_dev_put(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311{
312 if (atomic_dec_and_test(&idev->refcnt))
313 in6_dev_finish_destroy(idev);
314}
315
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000316static inline void __in6_dev_put(struct inet6_dev *idev)
317{
318 atomic_dec(&idev->refcnt);
319}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000321static inline void in6_dev_hold(struct inet6_dev *idev)
322{
323 atomic_inc(&idev->refcnt);
324}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
Joe Perchese8e54d32013-07-31 17:31:32 -0700326void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
328static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
329{
330 if (atomic_dec_and_test(&ifp->refcnt))
331 inet6_ifa_finish_destroy(ifp);
332}
333
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000334static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
335{
336 atomic_dec(&ifp->refcnt);
337}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000339static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
340{
341 atomic_inc(&ifp->refcnt);
342}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
345/*
346 * compute link-local solicited-node multicast address
347 */
348
349static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
350 struct in6_addr *solicited)
351{
352 ipv6_addr_set(solicited,
YOSHIFUJI Hideaki0e7b8dc2008-02-28 17:03:12 +0900353 htonl(0xFF020000), 0,
354 htonl(0x1),
355 htonl(0xFF000000) | addr->s6_addr32[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356}
357
YOSHIFUJI Hideakib27b28c2013-01-21 02:38:38 +0900358static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000360#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
Bjørn Morkbc861952014-02-27 14:20:29 +0100361 __be64 *p = (__be64 *)addr;
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000362 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
363#else
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000364 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900365 addr->s6_addr32[1] | addr->s6_addr32[2] |
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000366 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000367#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368}
369
YOSHIFUJI Hideakib27b28c2013-01-21 02:38:38 +0900370static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371{
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000372#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
Bjørn Morkbc861952014-02-27 14:20:29 +0100373 __be64 *p = (__be64 *)addr;
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000374 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
375#else
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000376 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900377 addr->s6_addr32[1] | addr->s6_addr32[2] |
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000378 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000379#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380}
381
YOSHIFUJI Hideakib27b28c2013-01-21 02:38:38 +0900382static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
Fred L. Templinc7dc89c2007-11-29 22:11:40 +1100383{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000384 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +1100385}
386
YOSHIFUJI Hideaki / 吉藤英明ca97a642013-01-20 07:39:00 +0000387static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
388{
YOSHIFUJI Hideaki / 吉藤英明9d100772013-01-20 07:39:07 +0000389#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
Bjørn Morkbc861952014-02-27 14:20:29 +0100390 __be64 *p = (__be64 *)addr;
YOSHIFUJI Hideaki / 吉藤英明9d100772013-01-20 07:39:07 +0000391 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
392 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
393 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
394#else
395 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
396 addr->s6_addr32[1] |
397 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
398 (addr->s6_addr[12] ^ 0xff)) == 0;
399#endif
YOSHIFUJI Hideaki / 吉藤英明ca97a642013-01-20 07:39:00 +0000400}
401
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300402#ifdef CONFIG_PROC_FS
Joe Perchese8e54d32013-07-31 17:31:32 -0700403int if6_proc_init(void);
404void if6_proc_exit(void);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300405#endif
406
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407#endif