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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 (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);
65
66#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
67int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
68#endif
69
70bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
71 const unsigned int prefix_len,
72 struct net_device *dev);
73
74int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
75
76struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
77 const struct in6_addr *addr,
78 struct net_device *dev, int strict);
79
80int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
81 const struct in6_addr *daddr, unsigned int srcprefs,
82 struct in6_addr *saddr);
83int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
84 u32 banned_flags);
85int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
86 u32 banned_flags);
87int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2);
88void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
89void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
90
91static inline unsigned long addrconf_timeout_fixup(u32 timeout,
92 unsigned int unit)
93{
94 if (timeout == 0xffffffff)
95 return ~0UL;
96
97 /*
98 * Avoid arithmetic overflow.
99 * Assuming unit is constant and non-zero, this "if" statement
100 * will go away on 64bit archs.
101 */
102 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
103 return LONG_MAX / unit;
104
105 return timeout;
106}
107
108static inline int addrconf_finite_timeout(unsigned long timeout)
109{
110 return ~timeout;
111}
112
113/*
114 * IPv6 Address Label subsystem (addrlabel.c)
115 */
116int ipv6_addr_label_init(void);
117void ipv6_addr_label_cleanup(void);
118void ipv6_addr_label_rtnl_register(void);
119u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
120 int type, int ifindex);
121
122/*
123 * multicast prototypes (mcast.c)
124 */
125int ipv6_sock_mc_join(struct sock *sk, int ifindex,
126 const struct in6_addr *addr);
127int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
128 const struct in6_addr *addr);
129void ipv6_sock_mc_close(struct sock *sk);
130bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
131 const struct in6_addr *src_addr);
132
133int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
134int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
135int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
136void ipv6_mc_up(struct inet6_dev *idev);
137void ipv6_mc_down(struct inet6_dev *idev);
138void ipv6_mc_unmap(struct inet6_dev *idev);
139void ipv6_mc_remap(struct inet6_dev *idev);
140void ipv6_mc_init_dev(struct inet6_dev *idev);
141void ipv6_mc_destroy_dev(struct inet6_dev *idev);
142void addrconf_dad_failure(struct inet6_ifaddr *ifp);
143
144bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
145 const struct in6_addr *src_addr);
146
147void ipv6_mc_dad_complete(struct inet6_dev *idev);
148
149/* A stub used by vxlan module. This is ugly, ideally these
150 * symbols should be built into the core kernel.
151 */
152struct ipv6_stub {
153 int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
154 const struct in6_addr *addr);
155 int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
156 const struct in6_addr *addr);
157 int (*ipv6_dst_lookup)(struct sock *sk, struct dst_entry **dst,
158 struct flowi6 *fl6);
159 void (*udpv6_encap_enable)(void);
160 void (*ndisc_send_na)(struct net_device *dev, struct neighbour *neigh,
161 const struct in6_addr *daddr,
162 const struct in6_addr *solicited_addr,
163 bool router, bool solicited, bool override, bool inc_opt);
164 struct neigh_table *nd_tbl;
165};
166extern const struct ipv6_stub *ipv6_stub __read_mostly;
167
168/*
169 * identify MLD packets for MLD filter exceptions
170 */
171static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
172{
173 struct icmp6hdr *hdr;
174
175 if (nexthdr != IPPROTO_ICMPV6 ||
176 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
177 return false;
178
179 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
180
181 switch (hdr->icmp6_type) {
182 case ICMPV6_MGM_QUERY:
183 case ICMPV6_MGM_REPORT:
184 case ICMPV6_MGM_REDUCTION:
185 case ICMPV6_MLD2_REPORT:
186 return true;
187 default:
188 break;
189 }
190 return false;
191}
192
193void addrconf_prefix_rcv(struct net_device *dev,
194 u8 *opt, int len, bool sllao);
195
196/*
197 * anycast prototypes (anycast.c)
198 */
199int ipv6_sock_ac_join(struct sock *sk, int ifindex,
200 const struct in6_addr *addr);
201int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
202 const struct in6_addr *addr);
203void ipv6_sock_ac_close(struct sock *sk);
204
205int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
206int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
207bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
208 const struct in6_addr *addr);
209bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
210 const struct in6_addr *addr);
211
212/* Device notifier */
213int register_inet6addr_notifier(struct notifier_block *nb);
214int unregister_inet6addr_notifier(struct notifier_block *nb);
215int inet6addr_notifier_call_chain(unsigned long val, void *v);
216
217void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
218 struct ipv6_devconf *devconf);
219
220/**
221 * __in6_dev_get - get inet6_dev pointer from netdevice
222 * @dev: network device
223 *
224 * Caller must hold rcu_read_lock or RTNL, because this function
225 * does not take a reference on the inet6_dev.
226 */
227static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
228{
229 return rcu_dereference_rtnl(dev->ip6_ptr);
230}
231
232/**
233 * in6_dev_get - get inet6_dev pointer from netdevice
234 * @dev: network device
235 *
236 * This version can be used in any context, and takes a reference
237 * on the inet6_dev. Callers must use in6_dev_put() later to
238 * release this reference.
239 */
240static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
241{
242 struct inet6_dev *idev;
243
244 rcu_read_lock();
245 idev = rcu_dereference(dev->ip6_ptr);
246 if (idev)
247 atomic_inc(&idev->refcnt);
248 rcu_read_unlock();
249 return idev;
250}
251
252static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
253{
254 struct inet6_dev *idev = __in6_dev_get(dev);
255
256 return idev ? idev->nd_parms : NULL;
257}
258
259void in6_dev_finish_destroy(struct inet6_dev *idev);
260
261static inline void in6_dev_put(struct inet6_dev *idev)
262{
263 if (atomic_dec_and_test(&idev->refcnt))
264 in6_dev_finish_destroy(idev);
265}
266
267static inline void __in6_dev_put(struct inet6_dev *idev)
268{
269 atomic_dec(&idev->refcnt);
270}
271
272static inline void in6_dev_hold(struct inet6_dev *idev)
273{
274 atomic_inc(&idev->refcnt);
275}
276
277void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
278
279static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
280{
281 if (atomic_dec_and_test(&ifp->refcnt))
282 inet6_ifa_finish_destroy(ifp);
283}
284
285static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
286{
287 atomic_dec(&ifp->refcnt);
288}
289
290static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
291{
292 atomic_inc(&ifp->refcnt);
293}
294
295
296/*
297 * compute link-local solicited-node multicast address
298 */
299
300static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
301 struct in6_addr *solicited)
302{
303 ipv6_addr_set(solicited,
304 htonl(0xFF020000), 0,
305 htonl(0x1),
306 htonl(0xFF000000) | addr->s6_addr32[3]);
307}
308
309static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
310{
311 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
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
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 (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 ipv4_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
91 bool match_wildcard);
92int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
93 bool match_wildcard);
94void 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);
96
97static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
98{
99 if (dev->addr_len != ETH_ALEN)
100 return -1;
101 memcpy(eui, dev->dev_addr, 3);
102 memcpy(eui + 5, dev->dev_addr + 3, 3);
103
104 /*
105 * The zSeries OSA network cards can be shared among various
106 * OS instances, but the OSA cards have only one MAC address.
107 * This leads to duplicate address conflicts in conjunction
108 * with IPv6 if more than one instance uses the same card.
109 *
110 * The driver for these cards can deliver a unique 16-bit
111 * identifier for each instance sharing the same card. It is
112 * placed instead of 0xFFFE in the interface identifier. The
113 * "u" bit of the interface identifier is not inverted in this
114 * case. Hence the resulting interface identifier has local
115 * scope according to RFC2373.
116 */
117 if (dev->dev_id) {
118 eui[3] = (dev->dev_id >> 8) & 0xFF;
119 eui[4] = dev->dev_id & 0xFF;
120 } else {
121 eui[3] = 0xFF;
122 eui[4] = 0xFE;
123 eui[0] ^= 2;
124 }
125 return 0;
126}
127
128static inline unsigned long addrconf_timeout_fixup(u32 timeout,
129 unsigned int unit)
130{
131 if (timeout == 0xffffffff)
132 return ~0UL;
133
134 /*
135 * Avoid arithmetic overflow.
136 * Assuming unit is constant and non-zero, this "if" statement
137 * will go away on 64bit archs.
138 */
139 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
140 return LONG_MAX / unit;
141
142 return timeout;
143}
144
145static inline int addrconf_finite_timeout(unsigned long timeout)
146{
147 return ~timeout;
148}
149
150/*
151 * IPv6 Address Label subsystem (addrlabel.c)
152 */
153int ipv6_addr_label_init(void);
154void ipv6_addr_label_cleanup(void);
155void ipv6_addr_label_rtnl_register(void);
156u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
157 int type, int ifindex);
158
159/*
160 * multicast prototypes (mcast.c)
161 */
162int ipv6_sock_mc_join(struct sock *sk, int ifindex,
163 const struct in6_addr *addr);
164int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
165 const struct in6_addr *addr);
166void ipv6_sock_mc_close(struct sock *sk);
167bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
168 const struct in6_addr *src_addr);
169
170int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
171int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
172int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
173void ipv6_mc_up(struct inet6_dev *idev);
174void ipv6_mc_down(struct inet6_dev *idev);
175void ipv6_mc_unmap(struct inet6_dev *idev);
176void ipv6_mc_remap(struct inet6_dev *idev);
177void ipv6_mc_init_dev(struct inet6_dev *idev);
178void ipv6_mc_destroy_dev(struct inet6_dev *idev);
179int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
180void addrconf_dad_failure(struct inet6_ifaddr *ifp);
181
182bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
183 const struct in6_addr *src_addr);
184
185void ipv6_mc_dad_complete(struct inet6_dev *idev);
186
187/* A stub used by vxlan module. This is ugly, ideally these
188 * symbols should be built into the core kernel.
189 */
190struct ipv6_stub {
191 int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
192 const struct in6_addr *addr);
193 int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
194 const struct in6_addr *addr);
195 int (*ipv6_dst_lookup)(struct net *net, struct sock *sk,
196 struct dst_entry **dst, struct flowi6 *fl6);
197 void (*udpv6_encap_enable)(void);
198 void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
199 const struct in6_addr *solicited_addr,
200 bool router, bool solicited, bool override, bool inc_opt);
201 struct neigh_table *nd_tbl;
202};
203extern const struct ipv6_stub *ipv6_stub __read_mostly;
204
205/*
206 * identify MLD packets for MLD filter exceptions
207 */
208static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
209{
210 struct icmp6hdr *hdr;
211
212 if (nexthdr != IPPROTO_ICMPV6 ||
213 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
214 return false;
215
216 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
217
218 switch (hdr->icmp6_type) {
219 case ICMPV6_MGM_QUERY:
220 case ICMPV6_MGM_REPORT:
221 case ICMPV6_MGM_REDUCTION:
222 case ICMPV6_MLD2_REPORT:
223 return true;
224 default:
225 break;
226 }
227 return false;
228}
229
230void addrconf_prefix_rcv(struct net_device *dev,
231 u8 *opt, int len, bool sllao);
232
233/*
234 * anycast prototypes (anycast.c)
235 */
236int ipv6_sock_ac_join(struct sock *sk, int ifindex,
237 const struct in6_addr *addr);
238int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
239 const struct in6_addr *addr);
240void ipv6_sock_ac_close(struct sock *sk);
241
242int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
243int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
244void ipv6_ac_destroy_dev(struct inet6_dev *idev);
245bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
246 const struct in6_addr *addr);
247bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
248 const struct in6_addr *addr);
249
250/* Device notifier */
251int register_inet6addr_notifier(struct notifier_block *nb);
252int unregister_inet6addr_notifier(struct notifier_block *nb);
253int inet6addr_notifier_call_chain(unsigned long val, void *v);
254
255void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
256 struct ipv6_devconf *devconf);
257
258/**
259 * __in6_dev_get - get inet6_dev pointer from netdevice
260 * @dev: network device
261 *
262 * Caller must hold rcu_read_lock or RTNL, because this function
263 * does not take a reference on the inet6_dev.
264 */
265static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
266{
267 return rcu_dereference_rtnl(dev->ip6_ptr);
268}
269
270/**
271 * in6_dev_get - get inet6_dev pointer from netdevice
272 * @dev: network device
273 *
274 * This version can be used in any context, and takes a reference
275 * on the inet6_dev. Callers must use in6_dev_put() later to
276 * release this reference.
277 */
278static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
279{
280 struct inet6_dev *idev;
281
282 rcu_read_lock();
283 idev = rcu_dereference(dev->ip6_ptr);
284 if (idev)
285 atomic_inc(&idev->refcnt);
286 rcu_read_unlock();
287 return idev;
288}
289
290static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
291{
292 struct inet6_dev *idev = __in6_dev_get(dev);
293
294 return idev ? idev->nd_parms : NULL;
295}
296
297void in6_dev_finish_destroy(struct inet6_dev *idev);
298
299static inline void in6_dev_put(struct inet6_dev *idev)
300{
301 if (atomic_dec_and_test(&idev->refcnt))
302 in6_dev_finish_destroy(idev);
303}
304
305static inline void __in6_dev_put(struct inet6_dev *idev)
306{
307 atomic_dec(&idev->refcnt);
308}
309
310static inline void in6_dev_hold(struct inet6_dev *idev)
311{
312 atomic_inc(&idev->refcnt);
313}
314
315void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
316
317static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
318{
319 if (atomic_dec_and_test(&ifp->refcnt))
320 inet6_ifa_finish_destroy(ifp);
321}
322
323static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
324{
325 atomic_dec(&ifp->refcnt);
326}
327
328static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
329{
330 atomic_inc(&ifp->refcnt);
331}
332
333
334/*
335 * compute link-local solicited-node multicast address
336 */
337
338static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
339 struct in6_addr *solicited)
340{
341 ipv6_addr_set(solicited,
342 htonl(0xFF020000), 0,
343 htonl(0x1),
344 htonl(0xFF000000) | addr->s6_addr32[3]);
345}
346
347static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
348{
349#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
350 __be64 *p = (__be64 *)addr;
351 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
352#else
353 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
354 addr->s6_addr32[1] | addr->s6_addr32[2] |
355 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
356#endif
357}
358
359static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
360{
361#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
362 __be64 *p = (__be64 *)addr;
363 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
364#else
365 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
366 addr->s6_addr32[1] | addr->s6_addr32[2] |
367 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
368#endif
369}
370
371static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
372{
373 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
374}
375
376static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
377{
378#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
379 __be64 *p = (__be64 *)addr;
380 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
381 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
382 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
383#else
384 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
385 addr->s6_addr32[1] |
386 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
387 (addr->s6_addr[12] ^ 0xff)) == 0;
388#endif
389}
390
391#ifdef CONFIG_PROC_FS
392int if6_proc_init(void);
393void if6_proc_exit(void);
394#endif
395
396#endif