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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/* 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 MIN_VALID_LIFETIME (2*3600) /* 2 hours */
10
11#define TEMP_VALID_LIFETIME (7*86400)
12#define TEMP_PREFERRED_LIFETIME (86400)
13#define REGEN_MAX_RETRY (3)
14#define MAX_DESYNC_FACTOR (600)
15
16#define ADDR_CHECK_FREQUENCY (120*HZ)
17
18#define IPV6_MAX_ADDRESSES 16
19
20#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1)
21#define ADDRCONF_TIMER_FUZZ (HZ / 4)
22#define ADDRCONF_TIMER_FUZZ_MAX (HZ)
23
24#define ADDRCONF_NOTIFY_PRIORITY 0
25
26#include <linux/in.h>
27#include <linux/in6.h>
28
29struct prefix_info {
30 __u8 type;
31 __u8 length;
32 __u8 prefix_len;
33
34#if defined(__BIG_ENDIAN_BITFIELD)
35 __u8 onlink : 1,
36 autoconf : 1,
37 reserved : 6;
38#elif defined(__LITTLE_ENDIAN_BITFIELD)
39 __u8 reserved : 6,
40 autoconf : 1,
41 onlink : 1;
42#else
43#error "Please fix <asm/byteorder.h>"
44#endif
45 __be32 valid;
46 __be32 prefered;
47 __be32 reserved2;
48
49 struct in6_addr prefix;
50};
51
52#include <linux/ipv6.h>
53#include <linux/netdevice.h>
54#include <net/if_inet6.h>
55#include <net/ipv6.h>
56
57struct in6_validator_info {
58 struct in6_addr i6vi_addr;
59 struct inet6_dev *i6vi_dev;
60 struct netlink_ext_ack *extack;
61};
62
63struct ifa6_config {
64 const struct in6_addr *pfx;
65 unsigned int plen;
66
67 u8 ifa_proto;
68
69 const struct in6_addr *peer_pfx;
70
71 u32 rt_priority;
72 u32 ifa_flags;
73 u32 preferred_lft;
74 u32 valid_lft;
75 u16 scope;
76};
77
78int addrconf_init(void);
79void addrconf_cleanup(void);
80
81int addrconf_add_ifaddr(struct net *net, void __user *arg);
82int addrconf_del_ifaddr(struct net *net, void __user *arg);
83int addrconf_set_dstaddr(struct net *net, void __user *arg);
84
85int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
86 const struct net_device *dev, int strict);
87int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
88 const struct net_device *dev, bool skip_dev_check,
89 int strict, u32 banned_flags);
90
91#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
92int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
93#endif
94
95int ipv6_chk_rpl_srh_loop(struct net *net, const struct in6_addr *segs,
96 unsigned char nsegs);
97
98bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
99 const unsigned int prefix_len,
100 struct net_device *dev);
101
102int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
103
104struct net_device *ipv6_dev_find(struct net *net, const struct in6_addr *addr,
105 struct net_device *dev);
106
107struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
108 const struct in6_addr *addr,
109 struct net_device *dev, int strict);
110
111int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
112 const struct in6_addr *daddr, unsigned int srcprefs,
113 struct in6_addr *saddr);
114int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
115 u32 banned_flags);
116bool inet_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
117 bool match_wildcard);
118bool inet_rcv_saddr_any(const struct sock *sk);
119void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
120void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
121
122void addrconf_add_linklocal(struct inet6_dev *idev,
123 const struct in6_addr *addr, u32 flags);
124
125int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
126 const struct prefix_info *pinfo,
127 struct inet6_dev *in6_dev,
128 const struct in6_addr *addr, int addr_type,
129 u32 addr_flags, bool sllao, bool tokenized,
130 __u32 valid_lft, u32 prefered_lft);
131
132static inline void addrconf_addr_eui48_base(u8 *eui, const char *const addr)
133{
134 memcpy(eui, addr, 3);
135 eui[3] = 0xFF;
136 eui[4] = 0xFE;
137 memcpy(eui + 5, addr + 3, 3);
138}
139
140static inline void addrconf_addr_eui48(u8 *eui, const char *const addr)
141{
142 addrconf_addr_eui48_base(eui, addr);
143 eui[0] ^= 2;
144}
145
146static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
147{
148 if (dev->addr_len != ETH_ALEN)
149 return -1;
150
151 /*
152 * The zSeries OSA network cards can be shared among various
153 * OS instances, but the OSA cards have only one MAC address.
154 * This leads to duplicate address conflicts in conjunction
155 * with IPv6 if more than one instance uses the same card.
156 *
157 * The driver for these cards can deliver a unique 16-bit
158 * identifier for each instance sharing the same card. It is
159 * placed instead of 0xFFFE in the interface identifier. The
160 * "u" bit of the interface identifier is not inverted in this
161 * case. Hence the resulting interface identifier has local
162 * scope according to RFC2373.
163 */
164
165 addrconf_addr_eui48_base(eui, dev->dev_addr);
166
167 if (dev->dev_id) {
168 eui[3] = (dev->dev_id >> 8) & 0xFF;
169 eui[4] = dev->dev_id & 0xFF;
170 } else {
171 eui[0] ^= 2;
172 }
173
174 return 0;
175}
176
177static inline unsigned long addrconf_timeout_fixup(u32 timeout,
178 unsigned int unit)
179{
180 if (timeout == 0xffffffff)
181 return ~0UL;
182
183 /*
184 * Avoid arithmetic overflow.
185 * Assuming unit is constant and non-zero, this "if" statement
186 * will go away on 64bit archs.
187 */
188 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
189 return LONG_MAX / unit;
190
191 return timeout;
192}
193
194static inline int addrconf_finite_timeout(unsigned long timeout)
195{
196 return ~timeout;
197}
198
199/*
200 * IPv6 Address Label subsystem (addrlabel.c)
201 */
202int ipv6_addr_label_init(void);
203void ipv6_addr_label_cleanup(void);
204int ipv6_addr_label_rtnl_register(void);
205u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
206 int type, int ifindex);
207
208/*
209 * multicast prototypes (mcast.c)
210 */
211static inline bool ipv6_mc_may_pull(struct sk_buff *skb,
212 unsigned int len)
213{
214 if (skb_transport_offset(skb) + ipv6_transport_len(skb) < len)
215 return false;
216
217 return pskb_may_pull(skb, len);
218}
219
220int ipv6_sock_mc_join(struct sock *sk, int ifindex,
221 const struct in6_addr *addr);
222int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
223 const struct in6_addr *addr);
224void __ipv6_sock_mc_close(struct sock *sk);
225void ipv6_sock_mc_close(struct sock *sk);
226bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
227 const struct in6_addr *src_addr);
228
229int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
230int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
231int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
232void ipv6_mc_up(struct inet6_dev *idev);
233void ipv6_mc_down(struct inet6_dev *idev);
234void ipv6_mc_unmap(struct inet6_dev *idev);
235void ipv6_mc_remap(struct inet6_dev *idev);
236void ipv6_mc_init_dev(struct inet6_dev *idev);
237void ipv6_mc_destroy_dev(struct inet6_dev *idev);
238int ipv6_mc_check_mld(struct sk_buff *skb);
239void addrconf_dad_failure(struct sk_buff *skb, struct inet6_ifaddr *ifp);
240
241bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
242 const struct in6_addr *src_addr);
243
244void ipv6_mc_dad_complete(struct inet6_dev *idev);
245
246/*
247 * identify MLD packets for MLD filter exceptions
248 */
249static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
250{
251 struct icmp6hdr *hdr;
252
253 if (nexthdr != IPPROTO_ICMPV6 ||
254 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
255 return false;
256
257 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
258
259 switch (hdr->icmp6_type) {
260 case ICMPV6_MGM_QUERY:
261 case ICMPV6_MGM_REPORT:
262 case ICMPV6_MGM_REDUCTION:
263 case ICMPV6_MLD2_REPORT:
264 return true;
265 default:
266 break;
267 }
268 return false;
269}
270
271void addrconf_prefix_rcv(struct net_device *dev,
272 u8 *opt, int len, bool sllao);
273
274/*
275 * anycast prototypes (anycast.c)
276 */
277int ipv6_sock_ac_join(struct sock *sk, int ifindex,
278 const struct in6_addr *addr);
279int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
280 const struct in6_addr *addr);
281void __ipv6_sock_ac_close(struct sock *sk);
282void ipv6_sock_ac_close(struct sock *sk);
283
284int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
285int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
286void ipv6_ac_destroy_dev(struct inet6_dev *idev);
287bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
288 const struct in6_addr *addr);
289bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
290 const struct in6_addr *addr);
291int ipv6_anycast_init(void);
292void ipv6_anycast_cleanup(void);
293
294/* Device notifier */
295int register_inet6addr_notifier(struct notifier_block *nb);
296int unregister_inet6addr_notifier(struct notifier_block *nb);
297int inet6addr_notifier_call_chain(unsigned long val, void *v);
298
299int register_inet6addr_validator_notifier(struct notifier_block *nb);
300int unregister_inet6addr_validator_notifier(struct notifier_block *nb);
301int inet6addr_validator_notifier_call_chain(unsigned long val, void *v);
302
303void inet6_netconf_notify_devconf(struct net *net, int event, int type,
304 int ifindex, struct ipv6_devconf *devconf);
305
306/**
307 * __in6_dev_get - get inet6_dev pointer from netdevice
308 * @dev: network device
309 *
310 * Caller must hold rcu_read_lock or RTNL, because this function
311 * does not take a reference on the inet6_dev.
312 */
313static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
314{
315 return rcu_dereference_rtnl(dev->ip6_ptr);
316}
317
318/**
319 * __in6_dev_stats_get - get inet6_dev pointer for stats
320 * @dev: network device
321 * @skb: skb for original incoming interface if neeeded
322 *
323 * Caller must hold rcu_read_lock or RTNL, because this function
324 * does not take a reference on the inet6_dev.
325 */
326static inline struct inet6_dev *__in6_dev_stats_get(const struct net_device *dev,
327 const struct sk_buff *skb)
328{
329 if (netif_is_l3_master(dev))
330 dev = dev_get_by_index_rcu(dev_net(dev), inet6_iif(skb));
331 return __in6_dev_get(dev);
332}
333
334/**
335 * __in6_dev_get_safely - get inet6_dev pointer from netdevice
336 * @dev: network device
337 *
338 * This is a safer version of __in6_dev_get
339 */
340static inline struct inet6_dev *__in6_dev_get_safely(const struct net_device *dev)
341{
342 if (likely(dev))
343 return rcu_dereference_rtnl(dev->ip6_ptr);
344 else
345 return NULL;
346}
347
348/**
349 * in6_dev_get - get inet6_dev pointer from netdevice
350 * @dev: network device
351 *
352 * This version can be used in any context, and takes a reference
353 * on the inet6_dev. Callers must use in6_dev_put() later to
354 * release this reference.
355 */
356static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
357{
358 struct inet6_dev *idev;
359
360 rcu_read_lock();
361 idev = rcu_dereference(dev->ip6_ptr);
362 if (idev)
363 refcount_inc(&idev->refcnt);
364 rcu_read_unlock();
365 return idev;
366}
367
368static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
369{
370 struct inet6_dev *idev = __in6_dev_get(dev);
371
372 return idev ? idev->nd_parms : NULL;
373}
374
375void in6_dev_finish_destroy(struct inet6_dev *idev);
376
377static inline void in6_dev_put(struct inet6_dev *idev)
378{
379 if (refcount_dec_and_test(&idev->refcnt))
380 in6_dev_finish_destroy(idev);
381}
382
383static inline void in6_dev_put_clear(struct inet6_dev **pidev)
384{
385 struct inet6_dev *idev = *pidev;
386
387 if (idev) {
388 in6_dev_put(idev);
389 *pidev = NULL;
390 }
391}
392
393static inline void __in6_dev_put(struct inet6_dev *idev)
394{
395 refcount_dec(&idev->refcnt);
396}
397
398static inline void in6_dev_hold(struct inet6_dev *idev)
399{
400 refcount_inc(&idev->refcnt);
401}
402
403/* called with rcu_read_lock held */
404static inline bool ip6_ignore_linkdown(const struct net_device *dev)
405{
406 const struct inet6_dev *idev = __in6_dev_get(dev);
407
408 if (unlikely(!idev))
409 return true;
410
411 return !!idev->cnf.ignore_routes_with_linkdown;
412}
413
414void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
415
416static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
417{
418 if (refcount_dec_and_test(&ifp->refcnt))
419 inet6_ifa_finish_destroy(ifp);
420}
421
422static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
423{
424 refcount_dec(&ifp->refcnt);
425}
426
427static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
428{
429 refcount_inc(&ifp->refcnt);
430}
431
432
433/*
434 * compute link-local solicited-node multicast address
435 */
436
437static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
438 struct in6_addr *solicited)
439{
440 ipv6_addr_set(solicited,
441 htonl(0xFF020000), 0,
442 htonl(0x1),
443 htonl(0xFF000000) | addr->s6_addr32[3]);
444}
445
446static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
447{
448#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
449 __be64 *p = (__force __be64 *)addr;
450 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
451#else
452 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
453 addr->s6_addr32[1] | addr->s6_addr32[2] |
454 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
455#endif
456}
457
458static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
459{
460#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
461 __be64 *p = (__force __be64 *)addr;
462 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
463#else
464 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
465 addr->s6_addr32[1] | addr->s6_addr32[2] |
466 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
467#endif
468}
469
470static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
471{
472 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
473}
474
475static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
476{
477#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
478 __be64 *p = (__force __be64 *)addr;
479 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
480 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
481 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
482#else
483 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
484 addr->s6_addr32[1] |
485 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
486 (addr->s6_addr[12] ^ 0xff)) == 0;
487#endif
488}
489
490static inline bool ipv6_addr_is_all_snoopers(const struct in6_addr *addr)
491{
492#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
493 __be64 *p = (__force __be64 *)addr;
494
495 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
496 (p[1] ^ cpu_to_be64(0x6a))) == 0UL;
497#else
498 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
499 addr->s6_addr32[1] | addr->s6_addr32[2] |
500 (addr->s6_addr32[3] ^ htonl(0x0000006a))) == 0;
501#endif
502}
503
504#ifdef CONFIG_PROC_FS
505int if6_proc_init(void);
506void if6_proc_exit(void);
507#endif
508
509#endif