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)
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 ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2);
91void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
92void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
93
94static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95 unsigned int unit)
96{
97 if (timeout == 0xffffffff)
98 return ~0UL;
99
100
101
102
103
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
118
119int ipv6_addr_label_init(void);
120void ipv6_addr_label_cleanup(void);
121void ipv6_addr_label_rtnl_register(void);
122u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
123 int type, int ifindex);
124
125
126
127
128int ipv6_sock_mc_join(struct sock *sk, int ifindex,
129 const struct in6_addr *addr);
130int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
131 const struct in6_addr *addr);
132void ipv6_sock_mc_close(struct sock *sk);
133bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
134 const struct in6_addr *src_addr);
135
136int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
137int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
138int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
139void ipv6_mc_up(struct inet6_dev *idev);
140void ipv6_mc_down(struct inet6_dev *idev);
141void ipv6_mc_unmap(struct inet6_dev *idev);
142void ipv6_mc_remap(struct inet6_dev *idev);
143void ipv6_mc_init_dev(struct inet6_dev *idev);
144void ipv6_mc_destroy_dev(struct inet6_dev *idev);
145void addrconf_dad_failure(struct inet6_ifaddr *ifp);
146
147bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
148 const struct in6_addr *src_addr);
149
150void ipv6_mc_dad_complete(struct inet6_dev *idev);
151
152
153
154
155struct ipv6_stub {
156 int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
157 const struct in6_addr *addr);
158 int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
159 const struct in6_addr *addr);
160 int (*ipv6_dst_lookup)(struct sock *sk, struct dst_entry **dst,
161 struct flowi6 *fl6);
162 void (*udpv6_encap_enable)(void);
163 void (*ndisc_send_na)(struct net_device *dev, struct neighbour *neigh,
164 const struct in6_addr *daddr,
165 const struct in6_addr *solicited_addr,
166 bool router, bool solicited, bool override, bool inc_opt);
167 struct neigh_table *nd_tbl;
168};
169extern const struct ipv6_stub *ipv6_stub __read_mostly;
170
171
172
173
174static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
175{
176 struct icmp6hdr *hdr;
177
178 if (nexthdr != IPPROTO_ICMPV6 ||
179 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
180 return false;
181
182 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
183
184 switch (hdr->icmp6_type) {
185 case ICMPV6_MGM_QUERY:
186 case ICMPV6_MGM_REPORT:
187 case ICMPV6_MGM_REDUCTION:
188 case ICMPV6_MLD2_REPORT:
189 return true;
190 default:
191 break;
192 }
193 return false;
194}
195
196void addrconf_prefix_rcv(struct net_device *dev,
197 u8 *opt, int len, bool sllao);
198
199
200
201
202int ipv6_sock_ac_join(struct sock *sk, int ifindex,
203 const struct in6_addr *addr);
204int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
205 const struct in6_addr *addr);
206void ipv6_sock_ac_close(struct sock *sk);
207
208int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
209int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
210void ipv6_ac_destroy_dev(struct inet6_dev *idev);
211bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
212 const struct in6_addr *addr);
213bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
214 const struct in6_addr *addr);
215
216
217int register_inet6addr_notifier(struct notifier_block *nb);
218int unregister_inet6addr_notifier(struct notifier_block *nb);
219int inet6addr_notifier_call_chain(unsigned long val, void *v);
220
221void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
222 struct ipv6_devconf *devconf);
223
224
225
226
227
228
229
230
231static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
232{
233 return rcu_dereference_rtnl(dev->ip6_ptr);
234}
235
236
237
238
239
240
241
242
243
244static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
245{
246 struct inet6_dev *idev;
247
248 rcu_read_lock();
249 idev = rcu_dereference(dev->ip6_ptr);
250 if (idev)
251 atomic_inc(&idev->refcnt);
252 rcu_read_unlock();
253 return idev;
254}
255
256static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
257{
258 struct inet6_dev *idev = __in6_dev_get(dev);
259
260 return idev ? idev->nd_parms : NULL;
261}
262
263void in6_dev_finish_destroy(struct inet6_dev *idev);
264
265static inline void in6_dev_put(struct inet6_dev *idev)
266{
267 if (atomic_dec_and_test(&idev->refcnt))
268 in6_dev_finish_destroy(idev);
269}
270
271static inline void __in6_dev_put(struct inet6_dev *idev)
272{
273 atomic_dec(&idev->refcnt);
274}
275
276static inline void in6_dev_hold(struct inet6_dev *idev)
277{
278 atomic_inc(&idev->refcnt);
279}
280
281void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
282
283static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
284{
285 if (atomic_dec_and_test(&ifp->refcnt))
286 inet6_ifa_finish_destroy(ifp);
287}
288
289static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
290{
291 atomic_dec(&ifp->refcnt);
292}
293
294static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
295{
296 atomic_inc(&ifp->refcnt);
297}
298
299
300
301
302
303
304static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
305 struct in6_addr *solicited)
306{
307 ipv6_addr_set(solicited,
308 htonl(0xFF020000), 0,
309 htonl(0x1),
310 htonl(0xFF000000) | addr->s6_addr32[3]);
311}
312
313static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
314{
315#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
316 __be64 *p = (__be64 *)addr;
317 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
318#else
319 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
320 addr->s6_addr32[1] | addr->s6_addr32[2] |
321 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
322#endif
323}
324
325static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
326{
327#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
328 __be64 *p = (__be64 *)addr;
329 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
330#else
331 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
332 addr->s6_addr32[1] | addr->s6_addr32[2] |
333 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
334#endif
335}
336
337static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
338{
339 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
340}
341
342static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
343{
344#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
345 __be64 *p = (__be64 *)addr;
346 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
347 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
348 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
349#else
350 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
351 addr->s6_addr32[1] |
352 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
353 (addr->s6_addr[12] ^ 0xff)) == 0;
354#endif
355}
356
357#ifdef CONFIG_PROC_FS
358int if6_proc_init(void);
359void if6_proc_exit(void);
360#endif
361
362#endif
363