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1da177e4
LT
1#ifndef _ADDRCONF_H
2#define _ADDRCONF_H
3
bd11f074 4#define MAX_RTR_SOLICITATIONS -1 /* unlimited */
1da177e4 5#define RTR_SOLICITATION_INTERVAL (4*HZ)
bd11f074 6#define RTR_SOLICITATION_MAX_INTERVAL (3600*HZ) /* 1 hour */
1da177e4
LT
7
8#define MIN_VALID_LIFETIME (2*3600) /* 2 hours */
9
10#define TEMP_VALID_LIFETIME (7*86400)
11#define TEMP_PREFERRED_LIFETIME (86400)
76f793e3 12#define REGEN_MAX_RETRY (3)
1da177e4
LT
13#define MAX_DESYNC_FACTOR (600)
14
15#define ADDR_CHECK_FREQUENCY (120*HZ)
16
17#define IPV6_MAX_ADDRESSES 16
18
5c766d64
JP
19#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
c7dc89c0 23#include <linux/in.h>
6a800d45
PM
24#include <linux/in6.h>
25
1da177e4
LT
26struct 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
e69a4adc
AV
42 __be32 valid;
43 __be32 prefered;
44 __be32 reserved2;
1da177e4
LT
45
46 struct in6_addr prefix;
47};
48
49
1da177e4
LT
50#include <linux/netdevice.h>
51#include <net/if_inet6.h>
e4553edd 52#include <net/ipv6.h>
1da177e4 53
ddbe5032
ED
54#define IN6_ADDR_HSIZE_SHIFT 4
55#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
1da177e4 56
e8e54d3c
JP
57int addrconf_init(void);
58void addrconf_cleanup(void);
1da177e4 59
e8e54d3c
JP
60int 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);
1da177e4 63
e8e54d3c
JP
64int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
65 const struct net_device *dev, int strict);
c58da4c6
EK
66int 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);
bfeade08 69
59fbb3a6 70#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
e8e54d3c 71int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
65d4ed92 72#endif
52eeeb84 73
7df37ff3
CB
74bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
75 const unsigned int prefix_len,
76 struct net_device *dev);
77
e8e54d3c
JP
78int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
79
80struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
81 const struct in6_addr *addr,
82 struct net_device *dev, int strict);
83
84int 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,
479840ff 88 u32 banned_flags);
e8e54d3c 89int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
479840ff 90 u32 banned_flags);
a583636a
CG
91int ipv4_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
92 bool match_wildcard);
e32ea7e7
CG
93int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
94 bool match_wildcard);
e8e54d3c
JP
95void 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);
1da177e4 97
2ad3ed59
AA
98void addrconf_add_linklocal(struct inet6_dev *idev,
99 const struct in6_addr *addr, u32 flags);
100
cc84b3c6
AA
101int 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
399e6f95
MB
108static 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
4bed72e4 139static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95c96174 140 unsigned int unit)
4bed72e4
YH
141{
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
2a8cc6c8
YH
161/*
162 * IPv6 Address Label subsystem (addrlabel.c)
163 */
e8e54d3c
JP
164int 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);
2a8cc6c8 169
1da177e4
LT
170/*
171 * multicast prototypes (mcast.c)
172 */
e8e54d3c
JP
173int 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);
8651be8f 177void __ipv6_sock_mc_close(struct sock *sk);
e8e54d3c
JP
178void ipv6_sock_mc_close(struct sock *sk);
179bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
180 const struct in6_addr *src_addr);
181
182int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
183int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
184int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
185void ipv6_mc_up(struct inet6_dev *idev);
186void ipv6_mc_down(struct inet6_dev *idev);
187void ipv6_mc_unmap(struct inet6_dev *idev);
188void ipv6_mc_remap(struct inet6_dev *idev);
189void ipv6_mc_init_dev(struct inet6_dev *idev);
190void ipv6_mc_destroy_dev(struct inet6_dev *idev);
9afd85c9 191int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
e8e54d3c
JP
192void addrconf_dad_failure(struct inet6_ifaddr *ifp);
193
194bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
195 const struct in6_addr *src_addr);
196
197void ipv6_mc_dad_complete(struct inet6_dev *idev);
5f81bd2e
CW
198
199/* A stub used by vxlan module. This is ugly, ideally these
200 * symbols should be built into the core kernel.
201 */
202struct ipv6_stub {
203 int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
204 const struct in6_addr *addr);
205 int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
206 const struct in6_addr *addr);
343d60aa
RP
207 int (*ipv6_dst_lookup)(struct net *net, struct sock *sk,
208 struct dst_entry **dst, struct flowi6 *fl6);
5f81bd2e 209 void (*udpv6_encap_enable)(void);
38cf595b 210 void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
f564f45c
CW
211 const struct in6_addr *solicited_addr,
212 bool router, bool solicited, bool override, bool inc_opt);
e15a00aa 213 struct neigh_table *nd_tbl;
5f81bd2e
CW
214};
215extern const struct ipv6_stub *ipv6_stub __read_mostly;
216
daad1512
YH
217/*
218 * identify MLD packets for MLD filter exceptions
219 */
220static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
221{
222 struct icmp6hdr *hdr;
223
224 if (nexthdr != IPPROTO_ICMPV6 ||
225 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
226 return false;
227
228 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
229
230 switch (hdr->icmp6_type) {
231 case ICMPV6_MGM_QUERY:
232 case ICMPV6_MGM_REPORT:
233 case ICMPV6_MGM_REDUCTION:
234 case ICMPV6_MLD2_REPORT:
235 return true;
236 default:
237 break;
238 }
239 return false;
240}
1da177e4 241
e8e54d3c
JP
242void addrconf_prefix_rcv(struct net_device *dev,
243 u8 *opt, int len, bool sllao);
1da177e4 244
1da177e4
LT
245/*
246 * anycast prototypes (anycast.c)
247 */
e8e54d3c
JP
248int ipv6_sock_ac_join(struct sock *sk, int ifindex,
249 const struct in6_addr *addr);
250int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
251 const struct in6_addr *addr);
252void ipv6_sock_ac_close(struct sock *sk);
253
013b4d90 254int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
e8e54d3c 255int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
381f4dca 256void ipv6_ac_destroy_dev(struct inet6_dev *idev);
e8e54d3c 257bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
7c90cc2d
FLB
258 const struct in6_addr *addr);
259bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
260 const struct in6_addr *addr);
1da177e4
LT
261
262/* Device notifier */
e8e54d3c
JP
263int register_inet6addr_notifier(struct notifier_block *nb);
264int unregister_inet6addr_notifier(struct notifier_block *nb);
265int inet6addr_notifier_call_chain(unsigned long val, void *v);
1da177e4 266
e8e54d3c
JP
267void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
268 struct ipv6_devconf *devconf);
d67b8c61 269
48daa3bb
ED
270/**
271 * __in6_dev_get - get inet6_dev pointer from netdevice
272 * @dev: network device
273 *
274 * Caller must hold rcu_read_lock or RTNL, because this function
275 * does not take a reference on the inet6_dev.
276 */
277static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
1da177e4 278{
48daa3bb 279 return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4
LT
280}
281
48daa3bb
ED
282/**
283 * in6_dev_get - get inet6_dev pointer from netdevice
284 * @dev: network device
285 *
286 * This version can be used in any context, and takes a reference
287 * on the inet6_dev. Callers must use in6_dev_put() later to
288 * release this reference.
289 */
290static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
1da177e4 291{
48daa3bb
ED
292 struct inet6_dev *idev;
293
8814c4b5 294 rcu_read_lock();
48daa3bb 295 idev = rcu_dereference(dev->ip6_ptr);
1da177e4
LT
296 if (idev)
297 atomic_inc(&idev->refcnt);
8814c4b5 298 rcu_read_unlock();
1da177e4
LT
299 return idev;
300}
301
bba24896
JP
302static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
303{
304 struct inet6_dev *idev = __in6_dev_get(dev);
305
306 return idev ? idev->nd_parms : NULL;
307}
308
e8e54d3c 309void in6_dev_finish_destroy(struct inet6_dev *idev);
1da177e4 310
48daa3bb 311static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4
LT
312{
313 if (atomic_dec_and_test(&idev->refcnt))
314 in6_dev_finish_destroy(idev);
315}
316
48daa3bb
ED
317static inline void __in6_dev_put(struct inet6_dev *idev)
318{
319 atomic_dec(&idev->refcnt);
320}
1da177e4 321
48daa3bb
ED
322static inline void in6_dev_hold(struct inet6_dev *idev)
323{
324 atomic_inc(&idev->refcnt);
325}
1da177e4 326
e8e54d3c 327void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
1da177e4
LT
328
329static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
330{
331 if (atomic_dec_and_test(&ifp->refcnt))
332 inet6_ifa_finish_destroy(ifp);
333}
334
48daa3bb
ED
335static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
336{
337 atomic_dec(&ifp->refcnt);
338}
1da177e4 339
48daa3bb
ED
340static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
341{
342 atomic_inc(&ifp->refcnt);
343}
1da177e4 344
1da177e4
LT
345
346/*
347 * compute link-local solicited-node multicast address
348 */
349
350static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
351 struct in6_addr *solicited)
352{
353 ipv6_addr_set(solicited,
0e7b8dcd
YH
354 htonl(0xFF020000), 0,
355 htonl(0x1),
356 htonl(0xFF000000) | addr->s6_addr32[3]);
1da177e4
LT
357}
358
b27b28cb 359static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
1da177e4 360{
d1641565 361#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959 362 __be64 *p = (__be64 *)addr;
d1641565
YH
363 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
364#else
48daa3bb 365 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
fed85383 366 addr->s6_addr32[1] | addr->s6_addr32[2] |
48daa3bb 367 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
d1641565 368#endif
1da177e4
LT
369}
370
b27b28cb 371static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
1da177e4 372{
d1641565 373#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959 374 __be64 *p = (__be64 *)addr;
d1641565
YH
375 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
376#else
48daa3bb 377 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
fed85383 378 addr->s6_addr32[1] | addr->s6_addr32[2] |
48daa3bb 379 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
d1641565 380#endif
1da177e4
LT
381}
382
b27b28cb 383static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0 384{
48daa3bb 385 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0
FT
386}
387
ca97a644
YH
388static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
389{
9d100774 390#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
bc861959 391 __be64 *p = (__be64 *)addr;
9d100774
YH
392 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
393 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
394 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
395#else
396 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
397 addr->s6_addr32[1] |
398 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
399 (addr->s6_addr[12] ^ 0xff)) == 0;
400#endif
ca97a644
YH
401}
402
20380731 403#ifdef CONFIG_PROC_FS
e8e54d3c
JP
404int if6_proc_init(void);
405void if6_proc_exit(void);
20380731
ACM
406#endif
407
1da177e4 408#endif