blob: b1774eb03f370d137591ecbab87e5a24c00bbda6 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _ADDRCONF_H
2#define _ADDRCONF_H
3
Linus Torvalds1da177e2005-04-16 15:20:36 -07004#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)
Lorenzo Colitti76f793e2011-07-26 13:50:49 +000011#define REGEN_MAX_RETRY (3)
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#define MAX_DESYNC_FACTOR (600)
13
14#define ADDR_CHECK_FREQUENCY (120*HZ)
15
16#define IPV6_MAX_ADDRESSES 16
17
Jiri Pirko5c766d62013-01-24 09:41:41 +000018#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
Fred L. Templinc7dc89c2007-11-29 22:11:40 +110022#include <linux/in.h>
Patrick McHardy6a800d42005-05-03 22:17:18 -070023#include <linux/in6.h>
24
Linus Torvalds1da177e2005-04-16 15:20:36 -070025struct 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
Al Viroe69a4ad2006-11-14 20:56:00 -080041 __be32 valid;
42 __be32 prefered;
43 __be32 reserved2;
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45 struct in6_addr prefix;
46};
47
48
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/netdevice.h>
50#include <net/if_inet6.h>
Herbert Xue4553ed2005-05-03 14:25:13 -070051#include <net/ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Eric Dumazetddbe5032012-07-18 08:11:12 +000053#define IN6_ADDR_HSIZE_SHIFT 4
54#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
Joe Perchese8e54d32013-07-31 17:31:32 -070056int addrconf_init(void);
57void addrconf_cleanup(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Joe Perchese8e54d32013-07-31 17:31:32 -070059int 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
Joe Perchese8e54d32013-07-31 17:31:32 -070063int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
64 const struct net_device *dev, int strict);
Erik Klinec58da4c2015-02-04 20:01:23 +090065int 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);
Daniel Lezcanobfeade02008-01-10 22:43:18 -080068
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -070069#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
Joe Perchese8e54d32013-07-31 17:31:32 -070070int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
Masahide NAKAMURA65d4ed92006-08-23 19:16:22 -070071#endif
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -040072
Catalin\(ux\) M. BOIE7df37ff2013-09-23 23:04:19 +030073bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
74 const unsigned int prefix_len,
75 struct net_device *dev);
76
Joe Perchese8e54d32013-07-31 17:31:32 -070077int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
YOSHIFUJI Hideaki52eeeb82008-03-15 22:54:23 -040078
Joe Perchese8e54d32013-07-31 17:31:32 -070079struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
80 const struct in6_addr *addr,
81 struct net_device *dev, int strict);
Daniel Lezcano1cab3da2008-01-10 22:44:09 -080082
Joe Perchese8e54d32013-07-31 17:31:32 -070083int 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,
Jiri Pirko479840f2013-12-06 09:45:21 +010087 u32 banned_flags);
Joe Perchese8e54d32013-07-31 17:31:32 -070088int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
Jiri Pirko479840f2013-12-06 09:45:21 +010089 u32 banned_flags);
Craig Galleka5836362016-02-10 11:50:38 -050090int ipv4_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
91 bool match_wildcard);
Craig Galleke32ea7e2016-01-04 17:41:46 -050092int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
93 bool match_wildcard);
Joe Perchese8e54d32013-07-31 17:31:32 -070094void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
95void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Alexander Aring2ad3ed52016-06-15 21:20:17 +020097void addrconf_add_linklocal(struct inet6_dev *idev,
98 const struct in6_addr *addr, u32 flags);
99
Matan Barak399e6f92015-07-30 18:33:22 +0300100static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
101{
102 if (dev->addr_len != ETH_ALEN)
103 return -1;
104 memcpy(eui, dev->dev_addr, 3);
105 memcpy(eui + 5, dev->dev_addr + 3, 3);
106
107 /*
108 * The zSeries OSA network cards can be shared among various
109 * OS instances, but the OSA cards have only one MAC address.
110 * This leads to duplicate address conflicts in conjunction
111 * with IPv6 if more than one instance uses the same card.
112 *
113 * The driver for these cards can deliver a unique 16-bit
114 * identifier for each instance sharing the same card. It is
115 * placed instead of 0xFFFE in the interface identifier. The
116 * "u" bit of the interface identifier is not inverted in this
117 * case. Hence the resulting interface identifier has local
118 * scope according to RFC2373.
119 */
120 if (dev->dev_id) {
121 eui[3] = (dev->dev_id >> 8) & 0xFF;
122 eui[4] = dev->dev_id & 0xFF;
123 } else {
124 eui[3] = 0xFF;
125 eui[4] = 0xFE;
126 eui[0] ^= 2;
127 }
128 return 0;
129}
130
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +0900131static inline unsigned long addrconf_timeout_fixup(u32 timeout,
Eric Dumazet95c96172012-04-15 05:58:06 +0000132 unsigned int unit)
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +0900133{
134 if (timeout == 0xffffffff)
135 return ~0UL;
136
137 /*
138 * Avoid arithmetic overflow.
139 * Assuming unit is constant and non-zero, this "if" statement
140 * will go away on 64bit archs.
141 */
142 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
143 return LONG_MAX / unit;
144
145 return timeout;
146}
147
148static inline int addrconf_finite_timeout(unsigned long timeout)
149{
150 return ~timeout;
151}
152
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153/*
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900154 * IPv6 Address Label subsystem (addrlabel.c)
155 */
Joe Perchese8e54d32013-07-31 17:31:32 -0700156int ipv6_addr_label_init(void);
157void ipv6_addr_label_cleanup(void);
158void ipv6_addr_label_rtnl_register(void);
159u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
160 int type, int ifindex);
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900161
162/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 * multicast prototypes (mcast.c)
164 */
Joe Perchese8e54d32013-07-31 17:31:32 -0700165int ipv6_sock_mc_join(struct sock *sk, int ifindex,
166 const struct in6_addr *addr);
167int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
168 const struct in6_addr *addr);
169void ipv6_sock_mc_close(struct sock *sk);
170bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
171 const struct in6_addr *src_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
Joe Perchese8e54d32013-07-31 17:31:32 -0700173int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
174int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
175int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
176void ipv6_mc_up(struct inet6_dev *idev);
177void ipv6_mc_down(struct inet6_dev *idev);
178void ipv6_mc_unmap(struct inet6_dev *idev);
179void ipv6_mc_remap(struct inet6_dev *idev);
180void ipv6_mc_init_dev(struct inet6_dev *idev);
181void ipv6_mc_destroy_dev(struct inet6_dev *idev);
Linus Lüssing9afd85c2015-05-02 14:01:07 +0200182int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
Joe Perchese8e54d32013-07-31 17:31:32 -0700183void addrconf_dad_failure(struct inet6_ifaddr *ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
Joe Perchese8e54d32013-07-31 17:31:32 -0700185bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
186 const struct in6_addr *src_addr);
YOSHIFUJI Hideaki / 吉藤英明daad1512013-01-13 05:02:18 +0000187
Joe Perchese8e54d32013-07-31 17:31:32 -0700188void ipv6_mc_dad_complete(struct inet6_dev *idev);
Cong Wang5f81bd22013-08-31 13:44:30 +0800189
190/* A stub used by vxlan module. This is ugly, ideally these
191 * symbols should be built into the core kernel.
192 */
193struct ipv6_stub {
194 int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
195 const struct in6_addr *addr);
196 int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
197 const struct in6_addr *addr);
Roopa Prabhu343d60a2015-07-30 13:34:53 -0700198 int (*ipv6_dst_lookup)(struct net *net, struct sock *sk,
199 struct dst_entry **dst, struct flowi6 *fl6);
Cong Wang5f81bd22013-08-31 13:44:30 +0800200 void (*udpv6_encap_enable)(void);
Jiri Benc38cf5952015-09-22 18:57:13 +0200201 void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
Cong Wangf564f452013-08-31 13:44:36 +0800202 const struct in6_addr *solicited_addr,
203 bool router, bool solicited, bool override, bool inc_opt);
Cong Wange15a00a2013-08-31 13:44:34 +0800204 struct neigh_table *nd_tbl;
Cong Wang5f81bd22013-08-31 13:44:30 +0800205};
206extern const struct ipv6_stub *ipv6_stub __read_mostly;
207
YOSHIFUJI Hideaki / 吉藤英明daad1512013-01-13 05:02:18 +0000208/*
209 * identify MLD packets for MLD filter exceptions
210 */
211static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
212{
213 struct icmp6hdr *hdr;
214
215 if (nexthdr != IPPROTO_ICMPV6 ||
216 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
217 return false;
218
219 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
220
221 switch (hdr->icmp6_type) {
222 case ICMPV6_MGM_QUERY:
223 case ICMPV6_MGM_REPORT:
224 case ICMPV6_MGM_REDUCTION:
225 case ICMPV6_MLD2_REPORT:
226 return true;
227 default:
228 break;
229 }
230 return false;
231}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
Joe Perchese8e54d32013-07-31 17:31:32 -0700233void addrconf_prefix_rcv(struct net_device *dev,
234 u8 *opt, int len, bool sllao);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236/*
237 * anycast prototypes (anycast.c)
238 */
Joe Perchese8e54d32013-07-31 17:31:32 -0700239int ipv6_sock_ac_join(struct sock *sk, int ifindex,
240 const struct in6_addr *addr);
241int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
242 const struct in6_addr *addr);
243void ipv6_sock_ac_close(struct sock *sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
WANG Cong013b4d92014-09-11 15:35:11 -0700245int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
Joe Perchese8e54d32013-07-31 17:31:32 -0700246int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
Sabrina Dubroca381f4dc2014-09-10 23:23:02 +0200247void ipv6_ac_destroy_dev(struct inet6_dev *idev);
Joe Perchese8e54d32013-07-31 17:31:32 -0700248bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
FX Le Bail7c90cc22014-01-22 07:42:37 +0100249 const struct in6_addr *addr);
250bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
251 const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
253/* Device notifier */
Joe Perchese8e54d32013-07-31 17:31:32 -0700254int register_inet6addr_notifier(struct notifier_block *nb);
255int unregister_inet6addr_notifier(struct notifier_block *nb);
256int inet6addr_notifier_call_chain(unsigned long val, void *v);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
Joe Perchese8e54d32013-07-31 17:31:32 -0700258void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
259 struct ipv6_devconf *devconf);
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000260
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000261/**
262 * __in6_dev_get - get inet6_dev pointer from netdevice
263 * @dev: network device
264 *
265 * Caller must hold rcu_read_lock or RTNL, because this function
266 * does not take a reference on the inet6_dev.
267 */
268static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000270 return rcu_dereference_rtnl(dev->ip6_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271}
272
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000273/**
274 * in6_dev_get - get inet6_dev pointer from netdevice
275 * @dev: network device
276 *
277 * This version can be used in any context, and takes a reference
278 * on the inet6_dev. Callers must use in6_dev_put() later to
279 * release this reference.
280 */
281static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000283 struct inet6_dev *idev;
284
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700285 rcu_read_lock();
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000286 idev = rcu_dereference(dev->ip6_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 if (idev)
288 atomic_inc(&idev->refcnt);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700289 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 return idev;
291}
292
Jiri Pirkobba24892013-12-07 19:26:57 +0100293static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
294{
295 struct inet6_dev *idev = __in6_dev_get(dev);
296
297 return idev ? idev->nd_parms : NULL;
298}
299
Joe Perchese8e54d32013-07-31 17:31:32 -0700300void in6_dev_finish_destroy(struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000302static inline void in6_dev_put(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303{
304 if (atomic_dec_and_test(&idev->refcnt))
305 in6_dev_finish_destroy(idev);
306}
307
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000308static inline void __in6_dev_put(struct inet6_dev *idev)
309{
310 atomic_dec(&idev->refcnt);
311}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000313static inline void in6_dev_hold(struct inet6_dev *idev)
314{
315 atomic_inc(&idev->refcnt);
316}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317
Joe Perchese8e54d32013-07-31 17:31:32 -0700318void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
320static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
321{
322 if (atomic_dec_and_test(&ifp->refcnt))
323 inet6_ifa_finish_destroy(ifp);
324}
325
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000326static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
327{
328 atomic_dec(&ifp->refcnt);
329}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000331static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
332{
333 atomic_inc(&ifp->refcnt);
334}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
337/*
338 * compute link-local solicited-node multicast address
339 */
340
341static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
342 struct in6_addr *solicited)
343{
344 ipv6_addr_set(solicited,
YOSHIFUJI Hideaki0e7b8dc2008-02-28 17:03:12 +0900345 htonl(0xFF020000), 0,
346 htonl(0x1),
347 htonl(0xFF000000) | addr->s6_addr32[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348}
349
YOSHIFUJI Hideakib27b28c2013-01-21 02:38:38 +0900350static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351{
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000352#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
Bjørn Morkbc861952014-02-27 14:20:29 +0100353 __be64 *p = (__be64 *)addr;
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000354 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
355#else
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000356 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900357 addr->s6_addr32[1] | addr->s6_addr32[2] |
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000358 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000359#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360}
361
YOSHIFUJI Hideakib27b28c2013-01-21 02:38:38 +0900362static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363{
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000364#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
Bjørn Morkbc861952014-02-27 14:20:29 +0100365 __be64 *p = (__be64 *)addr;
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000366 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
367#else
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000368 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900369 addr->s6_addr32[1] | addr->s6_addr32[2] |
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000370 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000371#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372}
373
YOSHIFUJI Hideakib27b28c2013-01-21 02:38:38 +0900374static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
Fred L. Templinc7dc89c2007-11-29 22:11:40 +1100375{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000376 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +1100377}
378
YOSHIFUJI Hideaki / 吉藤英明ca97a642013-01-20 07:39:00 +0000379static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
380{
YOSHIFUJI Hideaki / 吉藤英明9d100772013-01-20 07:39:07 +0000381#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
Bjørn Morkbc861952014-02-27 14:20:29 +0100382 __be64 *p = (__be64 *)addr;
YOSHIFUJI Hideaki / 吉藤英明9d100772013-01-20 07:39:07 +0000383 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
384 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
385 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
386#else
387 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
388 addr->s6_addr32[1] |
389 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
390 (addr->s6_addr[12] ^ 0xff)) == 0;
391#endif
YOSHIFUJI Hideaki / 吉藤英明ca97a642013-01-20 07:39:00 +0000392}
393
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300394#ifdef CONFIG_PROC_FS
Joe Perchese8e54d32013-07-31 17:31:32 -0700395int if6_proc_init(void);
396void if6_proc_exit(void);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300397#endif
398
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399#endif