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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);
Joe Perchese8e54d32013-07-31 17:31:32 -070090int 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +090094static inline unsigned long addrconf_timeout_fixup(u32 timeout,
Eric Dumazet95c96172012-04-15 05:58:06 +000095 unsigned int unit)
YOSHIFUJI Hideaki4bed72e2008-05-27 17:37:49 +090096{
97 if (timeout == 0xffffffff)
98 return ~0UL;
99
100 /*
101 * Avoid arithmetic overflow.
102 * Assuming unit is constant and non-zero, this "if" statement
103 * will go away on 64bit archs.
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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116/*
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900117 * IPv6 Address Label subsystem (addrlabel.c)
118 */
Joe Perchese8e54d32013-07-31 17:31:32 -0700119int 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);
YOSHIFUJI Hideaki2a8cc6c2007-11-14 15:56:23 +0900124
125/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 * multicast prototypes (mcast.c)
127 */
Joe Perchese8e54d32013-07-31 17:31:32 -0700128int 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135
Joe Perchese8e54d32013-07-31 17:31:32 -0700136int 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
Joe Perchese8e54d32013-07-31 17:31:32 -0700147bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
148 const struct in6_addr *src_addr);
YOSHIFUJI Hideaki / 吉藤英明daad1512013-01-13 05:02:18 +0000149
Joe Perchese8e54d32013-07-31 17:31:32 -0700150void ipv6_mc_dad_complete(struct inet6_dev *idev);
Cong Wang5f81bd22013-08-31 13:44:30 +0800151
152/* A stub used by vxlan module. This is ugly, ideally these
153 * symbols should be built into the core kernel.
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);
Cong Wangf564f452013-08-31 13:44:36 +0800163 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);
Cong Wange15a00a2013-08-31 13:44:34 +0800167 struct neigh_table *nd_tbl;
Cong Wang5f81bd22013-08-31 13:44:30 +0800168};
169extern const struct ipv6_stub *ipv6_stub __read_mostly;
170
YOSHIFUJI Hideaki / 吉藤英明daad1512013-01-13 05:02:18 +0000171/*
172 * identify MLD packets for MLD filter exceptions
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}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
Joe Perchese8e54d32013-07-31 17:31:32 -0700196void addrconf_prefix_rcv(struct net_device *dev,
197 u8 *opt, int len, bool sllao);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199/*
200 * anycast prototypes (anycast.c)
201 */
Joe Perchese8e54d32013-07-31 17:31:32 -0700202int 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207
WANG Cong013b4d92014-09-11 15:35:11 -0700208int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
Joe Perchese8e54d32013-07-31 17:31:32 -0700209int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
Sabrina Dubroca381f4dc2014-09-10 23:23:02 +0200210void ipv6_ac_destroy_dev(struct inet6_dev *idev);
Joe Perchese8e54d32013-07-31 17:31:32 -0700211bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
FX Le Bail7c90cc22014-01-22 07:42:37 +0100212 const struct in6_addr *addr);
213bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
214 const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
216/* Device notifier */
Joe Perchese8e54d32013-07-31 17:31:32 -0700217int 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220
Joe Perchese8e54d32013-07-31 17:31:32 -0700221void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
222 struct ipv6_devconf *devconf);
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000223
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000224/**
225 * __in6_dev_get - get inet6_dev pointer from netdevice
226 * @dev: network device
227 *
228 * Caller must hold rcu_read_lock or RTNL, because this function
229 * does not take a reference on the inet6_dev.
230 */
231static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000233 return rcu_dereference_rtnl(dev->ip6_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234}
235
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000236/**
237 * in6_dev_get - get inet6_dev pointer from netdevice
238 * @dev: network device
239 *
240 * This version can be used in any context, and takes a reference
241 * on the inet6_dev. Callers must use in6_dev_put() later to
242 * release this reference.
243 */
244static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000246 struct inet6_dev *idev;
247
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700248 rcu_read_lock();
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000249 idev = rcu_dereference(dev->ip6_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 if (idev)
251 atomic_inc(&idev->refcnt);
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700252 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 return idev;
254}
255
Jiri Pirkobba24892013-12-07 19:26:57 +0100256static 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
Joe Perchese8e54d32013-07-31 17:31:32 -0700263void in6_dev_finish_destroy(struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000265static inline void in6_dev_put(struct inet6_dev *idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266{
267 if (atomic_dec_and_test(&idev->refcnt))
268 in6_dev_finish_destroy(idev);
269}
270
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000271static inline void __in6_dev_put(struct inet6_dev *idev)
272{
273 atomic_dec(&idev->refcnt);
274}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000276static inline void in6_dev_hold(struct inet6_dev *idev)
277{
278 atomic_inc(&idev->refcnt);
279}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
Joe Perchese8e54d32013-07-31 17:31:32 -0700281void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282
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
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000289static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
290{
291 atomic_dec(&ifp->refcnt);
292}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000294static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
295{
296 atomic_inc(&ifp->refcnt);
297}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
300/*
301 * compute link-local solicited-node multicast address
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,
YOSHIFUJI Hideaki0e7b8dc2008-02-28 17:03:12 +0900308 htonl(0xFF020000), 0,
309 htonl(0x1),
310 htonl(0xFF000000) | addr->s6_addr32[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311}
312
YOSHIFUJI Hideakib27b28c2013-01-21 02:38:38 +0900313static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314{
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000315#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
Bjørn Morkbc861952014-02-27 14:20:29 +0100316 __be64 *p = (__be64 *)addr;
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000317 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
318#else
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000319 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900320 addr->s6_addr32[1] | addr->s6_addr32[2] |
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000321 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000322#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323}
324
YOSHIFUJI Hideakib27b28c2013-01-21 02:38:38 +0900325static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326{
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000327#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
Bjørn Morkbc861952014-02-27 14:20:29 +0100328 __be64 *p = (__be64 *)addr;
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000329 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
330#else
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000331 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
YOSHIFUJI Hideakifed853832008-04-11 20:17:55 +0900332 addr->s6_addr32[1] | addr->s6_addr32[2] |
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000333 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
YOSHIFUJI Hideaki / 吉藤英明d1641562013-01-20 07:38:52 +0000334#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335}
336
YOSHIFUJI Hideakib27b28c2013-01-21 02:38:38 +0900337static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
Fred L. Templinc7dc89c2007-11-29 22:11:40 +1100338{
Eric Dumazet48daa3b2010-09-21 06:57:39 +0000339 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
Fred L. Templinc7dc89c2007-11-29 22:11:40 +1100340}
341
YOSHIFUJI Hideaki / 吉藤英明ca97a642013-01-20 07:39:00 +0000342static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
343{
YOSHIFUJI Hideaki / 吉藤英明9d100772013-01-20 07:39:07 +0000344#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
Bjørn Morkbc861952014-02-27 14:20:29 +0100345 __be64 *p = (__be64 *)addr;
YOSHIFUJI Hideaki / 吉藤英明9d100772013-01-20 07:39:07 +0000346 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
YOSHIFUJI Hideaki / 吉藤英明ca97a642013-01-20 07:39:00 +0000355}
356
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300357#ifdef CONFIG_PROC_FS
Joe Perchese8e54d32013-07-31 17:31:32 -0700358int if6_proc_init(void);
359void if6_proc_exit(void);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300360#endif
361
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362#endif