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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
[deliverable/linux.git] / include / net / addrconf.h
CommitLineData
1da177e4
LT		 1#ifndef _ADDRCONF_H
2#define _ADDRCONF_H
3
1da177e4
LT		 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)
76f793e3 11#define REGEN_MAX_RETRY (3)
1da177e4
LT		 12#define MAX_DESYNC_FACTOR (600)
13
14#define ADDR_CHECK_FREQUENCY (120*HZ)
15
16#define IPV6_MAX_ADDRESSES 16
17
5c766d64
JP		 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
c7dc89c0 22#include <linux/in.h>
6a800d45
PM		 23#include <linux/in6.h>
24
1da177e4
LT		 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
e69a4adc
AV		 41 __be32 valid;
42 __be32 prefered;
43 __be32 reserved2;
1da177e4
LT		 44
45 struct in6_addr prefix;
46};
47
48
1da177e4
LT		 49#include <linux/netdevice.h>
50#include <net/if_inet6.h>
e4553edd 51#include <net/ipv6.h>
1da177e4 52
ddbe5032
ED		 53#define IN6_ADDR_HSIZE_SHIFT 4
54#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
1da177e4
LT		 55
56extern int addrconf_init(void);
57extern void addrconf_cleanup(void);
58
af284937
DL		 59extern int addrconf_add_ifaddr(struct net *net,
60 void __user *arg);
61extern int addrconf_del_ifaddr(struct net *net,
62 void __user *arg);
63extern int addrconf_set_dstaddr(struct net *net,
64 void __user *arg);
1da177e4 65
bfeade08 66extern int ipv6_chk_addr(struct net *net,
b71d1d42 67 const struct in6_addr *addr,
1da177e4
LT		 68 struct net_device *dev,
69 int strict);
bfeade08 70
59fbb3a6 71#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
389f6612 72extern int ipv6_chk_home_addr(struct net *net,
b71d1d42 73 const struct in6_addr *addr);
65d4ed92 74#endif
52eeeb84 75
b71d1d42 76extern int ipv6_chk_prefix(const struct in6_addr *addr,
52eeeb84
YH		 77 struct net_device *dev);
78
1cab3da6 79extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
9acd9f3a 80 const struct in6_addr *addr,
1cab3da6
DL		 81 struct net_device *dev,
82 int strict);
83
191cd582 84extern int ipv6_dev_get_saddr(struct net *net,
b3f644fc 85 const struct net_device *dev,
9acd9f3a 86 const struct in6_addr *daddr,
7cbca67c 87 unsigned int srcprefs,
1da177e4 88 struct in6_addr *saddr);
95c385b4
NH		 89extern int ipv6_get_lladdr(struct net_device *dev,
90 struct in6_addr *addr,
91 unsigned char banned_flags);
b2f5e7cd
VY		 92extern int ipv6_rcv_saddr_equal(const struct sock *sk,
93 const struct sock *sk2);
1da177e4 94extern void addrconf_join_solict(struct net_device *dev,
b71d1d42 95 const struct in6_addr *addr);
1da177e4 96extern void addrconf_leave_solict(struct inet6_dev *idev,
b71d1d42 97 const struct in6_addr *addr);
1da177e4 98
4bed72e4 99static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95c96174 100 unsigned int unit)
4bed72e4
YH		 101{
102 if (timeout == 0xffffffff)
103 return ~0UL;
104
105 /*
106 * Avoid arithmetic overflow.
107 * Assuming unit is constant and non-zero, this "if" statement
108 * will go away on 64bit archs.
109 */
110 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
111 return LONG_MAX / unit;
112
113 return timeout;
114}
115
116static inline int addrconf_finite_timeout(unsigned long timeout)
117{
118 return ~timeout;
119}
120
2a8cc6c8
YH		 121/*
122 * IPv6 Address Label subsystem (addrlabel.c)
123 */
124extern int ipv6_addr_label_init(void);
2cc6d2bf 125extern void ipv6_addr_label_cleanup(void);
2a8cc6c8 126extern void ipv6_addr_label_rtnl_register(void);
3de23255
BT		 127extern u32 ipv6_addr_label(struct net *net,
128 const struct in6_addr *addr,
2a8cc6c8
YH		 129 int type, int ifindex);
130
1da177e4
LT		 131/*
132 * multicast prototypes (mcast.c)
133 */
9acd9f3a
YH		 134extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
135 const struct in6_addr *addr);
136extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
137 const struct in6_addr *addr);
1da177e4 138extern void ipv6_sock_mc_close(struct sock *sk);
a50feda5
ED		 139extern bool inet6_mc_check(struct sock *sk,
140 const struct in6_addr *mc_addr,
141 const struct in6_addr *src_addr);
1da177e4 142
9acd9f3a
YH		 143extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
144extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
145extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
1da177e4
LT		 146extern void ipv6_mc_up(struct inet6_dev *idev);
147extern void ipv6_mc_down(struct inet6_dev *idev);
75c78500
MS		 148extern void ipv6_mc_unmap(struct inet6_dev *idev);
149extern void ipv6_mc_remap(struct inet6_dev *idev);
1da177e4
LT		 150extern void ipv6_mc_init_dev(struct inet6_dev *idev);
151extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
152extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
153
a50feda5
ED		 154extern bool ipv6_chk_mcast_addr(struct net_device *dev,
155 const struct in6_addr *group,
156 const struct in6_addr *src_addr);
daad1512
YH		 157
158/*
159 * identify MLD packets for MLD filter exceptions
160 */
161static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
162{
163 struct icmp6hdr *hdr;
164
165 if (nexthdr != IPPROTO_ICMPV6 ||
166 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
167 return false;
168
169 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
170
171 switch (hdr->icmp6_type) {
172 case ICMPV6_MGM_QUERY:
173 case ICMPV6_MGM_REPORT:
174 case ICMPV6_MGM_REDUCTION:
175 case ICMPV6_MLD2_REPORT:
176 return true;
177 default:
178 break;
179 }
180 return false;
181}
1da177e4 182
e6bff995
NH		 183extern void addrconf_prefix_rcv(struct net_device *dev,
184 u8 *opt, int len, bool sllao);
1da177e4 185
1da177e4
LT		 186/*
187 * anycast prototypes (anycast.c)
188 */
b71d1d42
ED		 189extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr);
190extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr);
1da177e4 191extern void ipv6_sock_ac_close(struct sock *sk);
1da177e4 192
b71d1d42
ED		 193extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
194extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
a50feda5
ED		 195extern bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
196 const struct in6_addr *addr);
1da177e4
LT		 197
198
199/* Device notifier */
200extern int register_inet6addr_notifier(struct notifier_block *nb);
201extern int unregister_inet6addr_notifier(struct notifier_block *nb);
202
d67b8c61
ND		 203extern void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
204 struct ipv6_devconf *devconf);
205
48daa3bb
ED		 206/**
207 * __in6_dev_get - get inet6_dev pointer from netdevice
208 * @dev: network device
209 *
210 * Caller must hold rcu_read_lock or RTNL, because this function
211 * does not take a reference on the inet6_dev.
212 */
213static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
1da177e4 214{
48daa3bb 215 return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4
LT		 216}
217
48daa3bb
ED		 218/**
219 * in6_dev_get - get inet6_dev pointer from netdevice
220 * @dev: network device
221 *
222 * This version can be used in any context, and takes a reference
223 * on the inet6_dev. Callers must use in6_dev_put() later to
224 * release this reference.
225 */
226static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
1da177e4 227{
48daa3bb
ED		 228 struct inet6_dev *idev;
229
8814c4b5 230 rcu_read_lock();
48daa3bb 231 idev = rcu_dereference(dev->ip6_ptr);
1da177e4
LT		 232 if (idev)
233 atomic_inc(&idev->refcnt);
8814c4b5 234 rcu_read_unlock();
1da177e4
LT		 235 return idev;
236}
237
238extern void in6_dev_finish_destroy(struct inet6_dev *idev);
239
48daa3bb 240static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4
LT		 241{
242 if (atomic_dec_and_test(&idev->refcnt))
243 in6_dev_finish_destroy(idev);
244}
245
48daa3bb
ED		 246static inline void __in6_dev_put(struct inet6_dev *idev)
247{
248 atomic_dec(&idev->refcnt);
249}
1da177e4 250
48daa3bb
ED		 251static inline void in6_dev_hold(struct inet6_dev *idev)
252{
253 atomic_inc(&idev->refcnt);
254}
1da177e4
LT		 255
256extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
257
258static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
259{
260 if (atomic_dec_and_test(&ifp->refcnt))
261 inet6_ifa_finish_destroy(ifp);
262}
263
48daa3bb
ED		 264static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
265{
266 atomic_dec(&ifp->refcnt);
267}
1da177e4 268
48daa3bb
ED		 269static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
270{
271 atomic_inc(&ifp->refcnt);
272}
1da177e4 273
1da177e4
LT		 274
275/*
276 * compute link-local solicited-node multicast address
277 */
278
279static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
280 struct in6_addr *solicited)
281{
282 ipv6_addr_set(solicited,
0e7b8dcd
YH		 283 htonl(0xFF020000), 0,
284 htonl(0x1),
285 htonl(0xFF000000) | addr->s6_addr32[3]);
1da177e4
LT		 286}
287
b27b28cb 288static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
1da177e4 289{
0e7b8dcd 290 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
1da177e4
LT		 291}
292
b27b28cb 293static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
1da177e4 294{
d1641565
YH		 295#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
296 __u64 *p = (__u64 *)addr;
297 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
298#else
48daa3bb 299 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
fed85383 300 addr->s6_addr32[1] | addr->s6_addr32[2] |
48daa3bb 301 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
d1641565 302#endif
1da177e4
LT		 303}
304
b27b28cb 305static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
1da177e4 306{
d1641565
YH		 307#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
308 __u64 *p = (__u64 *)addr;
309 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
310#else
48daa3bb 311 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
fed85383 312 addr->s6_addr32[1] | addr->s6_addr32[2] |
48daa3bb 313 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
d1641565 314#endif
1da177e4
LT		 315}
316
b27b28cb 317static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0 318{
48daa3bb 319 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0
FT		 320}
321
ca97a644
YH		 322static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
323{
9d100774
YH		 324#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
325 __u64 *p = (__u64 *)addr;
326 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
327 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
328 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
329#else
330 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
331 addr->s6_addr32[1] |
332 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
333 (addr->s6_addr[12] ^ 0xff)) == 0;
334#endif
ca97a644
YH		 335}
336
20380731
ACM		 337#ifdef CONFIG_PROC_FS
338extern int if6_proc_init(void);
339extern void if6_proc_exit(void);
340#endif
341
1da177e4 342#endif
Linux kernel - Deliverables
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