projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ipv6: Optimize ipv6_addr_is_solict_mult().
[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
c7dc89c0 18#include <linux/in.h>
6a800d45
PM		 19#include <linux/in6.h>
20
1da177e4
LT		 21struct prefix_info {
22 __u8 type;
23 __u8 length;
24 __u8 prefix_len;
25
26#if defined(__BIG_ENDIAN_BITFIELD)
27 __u8 onlink : 1,
28 autoconf : 1,
29 reserved : 6;
30#elif defined(__LITTLE_ENDIAN_BITFIELD)
31 __u8 reserved : 6,
32 autoconf : 1,
33 onlink : 1;
34#else
35#error "Please fix <asm/byteorder.h>"
36#endif
e69a4adc
AV		 37 __be32 valid;
38 __be32 prefered;
39 __be32 reserved2;
1da177e4
LT		 40
41 struct in6_addr prefix;
42};
43
44
1da177e4
LT		 45#include <linux/netdevice.h>
46#include <net/if_inet6.h>
e4553edd 47#include <net/ipv6.h>
1da177e4 48
ddbe5032
ED		 49#define IN6_ADDR_HSIZE_SHIFT 4
50#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
1da177e4
LT		 51
52extern int addrconf_init(void);
53extern void addrconf_cleanup(void);
54
af284937
DL		 55extern int addrconf_add_ifaddr(struct net *net,
56 void __user *arg);
57extern int addrconf_del_ifaddr(struct net *net,
58 void __user *arg);
59extern int addrconf_set_dstaddr(struct net *net,
60 void __user *arg);
1da177e4 61
bfeade08 62extern int ipv6_chk_addr(struct net *net,
b71d1d42 63 const struct in6_addr *addr,
1da177e4
LT		 64 struct net_device *dev,
65 int strict);
bfeade08 66
59fbb3a6 67#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
389f6612 68extern int ipv6_chk_home_addr(struct net *net,
b71d1d42 69 const struct in6_addr *addr);
65d4ed92 70#endif
52eeeb84 71
b71d1d42 72extern int ipv6_chk_prefix(const struct in6_addr *addr,
52eeeb84
YH		 73 struct net_device *dev);
74
1cab3da6 75extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
9acd9f3a 76 const struct in6_addr *addr,
1cab3da6
DL		 77 struct net_device *dev,
78 int strict);
79
191cd582 80extern int ipv6_dev_get_saddr(struct net *net,
b3f644fc 81 const struct net_device *dev,
9acd9f3a 82 const struct in6_addr *daddr,
7cbca67c 83 unsigned int srcprefs,
1da177e4 84 struct in6_addr *saddr);
95c385b4
NH		 85extern int ipv6_get_lladdr(struct net_device *dev,
86 struct in6_addr *addr,
87 unsigned char banned_flags);
b2f5e7cd
VY		 88extern int ipv6_rcv_saddr_equal(const struct sock *sk,
89 const struct sock *sk2);
1da177e4 90extern void addrconf_join_solict(struct net_device *dev,
b71d1d42 91 const struct in6_addr *addr);
1da177e4 92extern void addrconf_leave_solict(struct inet6_dev *idev,
b71d1d42 93 const struct in6_addr *addr);
1da177e4 94
4bed72e4 95static inline unsigned long addrconf_timeout_fixup(u32 timeout,
95c96174 96 unsigned int unit)
4bed72e4
YH		 97{
98 if (timeout == 0xffffffff)
99 return ~0UL;
100
101 /*
102 * Avoid arithmetic overflow.
103 * Assuming unit is constant and non-zero, this "if" statement
104 * will go away on 64bit archs.
105 */
106 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
107 return LONG_MAX / unit;
108
109 return timeout;
110}
111
112static inline int addrconf_finite_timeout(unsigned long timeout)
113{
114 return ~timeout;
115}
116
2a8cc6c8
YH		 117/*
118 * IPv6 Address Label subsystem (addrlabel.c)
119 */
120extern int ipv6_addr_label_init(void);
2cc6d2bf 121extern void ipv6_addr_label_cleanup(void);
2a8cc6c8 122extern void ipv6_addr_label_rtnl_register(void);
3de23255
BT		 123extern u32 ipv6_addr_label(struct net *net,
124 const struct in6_addr *addr,
2a8cc6c8
YH		 125 int type, int ifindex);
126
1da177e4
LT		 127/*
128 * multicast prototypes (mcast.c)
129 */
9acd9f3a
YH		 130extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
131 const struct in6_addr *addr);
132extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
133 const struct in6_addr *addr);
1da177e4 134extern void ipv6_sock_mc_close(struct sock *sk);
a50feda5
ED		 135extern bool inet6_mc_check(struct sock *sk,
136 const struct in6_addr *mc_addr,
137 const struct in6_addr *src_addr);
1da177e4 138
9acd9f3a
YH		 139extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
140extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
141extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
1da177e4
LT		 142extern void ipv6_mc_up(struct inet6_dev *idev);
143extern void ipv6_mc_down(struct inet6_dev *idev);
75c78500
MS		 144extern void ipv6_mc_unmap(struct inet6_dev *idev);
145extern void ipv6_mc_remap(struct inet6_dev *idev);
1da177e4
LT		 146extern void ipv6_mc_init_dev(struct inet6_dev *idev);
147extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
148extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
149
a50feda5
ED		 150extern bool ipv6_chk_mcast_addr(struct net_device *dev,
151 const struct in6_addr *group,
152 const struct in6_addr *src_addr);
daad1512
YH		 153
154/*
155 * identify MLD packets for MLD filter exceptions
156 */
157static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
158{
159 struct icmp6hdr *hdr;
160
161 if (nexthdr != IPPROTO_ICMPV6 ||
162 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
163 return false;
164
165 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
166
167 switch (hdr->icmp6_type) {
168 case ICMPV6_MGM_QUERY:
169 case ICMPV6_MGM_REPORT:
170 case ICMPV6_MGM_REDUCTION:
171 case ICMPV6_MLD2_REPORT:
172 return true;
173 default:
174 break;
175 }
176 return false;
177}
1da177e4 178
e6bff995
NH		 179extern void addrconf_prefix_rcv(struct net_device *dev,
180 u8 *opt, int len, bool sllao);
1da177e4 181
1da177e4
LT		 182/*
183 * anycast prototypes (anycast.c)
184 */
b71d1d42
ED		 185extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr);
186extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr);
1da177e4 187extern void ipv6_sock_ac_close(struct sock *sk);
1da177e4 188
b71d1d42
ED		 189extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
190extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
a50feda5
ED		 191extern bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
192 const struct in6_addr *addr);
1da177e4
LT		 193
194
195/* Device notifier */
196extern int register_inet6addr_notifier(struct notifier_block *nb);
197extern int unregister_inet6addr_notifier(struct notifier_block *nb);
198
d67b8c61
ND		 199extern void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
200 struct ipv6_devconf *devconf);
201
48daa3bb
ED		 202/**
203 * __in6_dev_get - get inet6_dev pointer from netdevice
204 * @dev: network device
205 *
206 * Caller must hold rcu_read_lock or RTNL, because this function
207 * does not take a reference on the inet6_dev.
208 */
209static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
1da177e4 210{
48daa3bb 211 return rcu_dereference_rtnl(dev->ip6_ptr);
1da177e4
LT		 212}
213
48daa3bb
ED		 214/**
215 * in6_dev_get - get inet6_dev pointer from netdevice
216 * @dev: network device
217 *
218 * This version can be used in any context, and takes a reference
219 * on the inet6_dev. Callers must use in6_dev_put() later to
220 * release this reference.
221 */
222static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
1da177e4 223{
48daa3bb
ED		 224 struct inet6_dev *idev;
225
8814c4b5 226 rcu_read_lock();
48daa3bb 227 idev = rcu_dereference(dev->ip6_ptr);
1da177e4
LT		 228 if (idev)
229 atomic_inc(&idev->refcnt);
8814c4b5 230 rcu_read_unlock();
1da177e4
LT		 231 return idev;
232}
233
234extern void in6_dev_finish_destroy(struct inet6_dev *idev);
235
48daa3bb 236static inline void in6_dev_put(struct inet6_dev *idev)
1da177e4
LT		 237{
238 if (atomic_dec_and_test(&idev->refcnt))
239 in6_dev_finish_destroy(idev);
240}
241
48daa3bb
ED		 242static inline void __in6_dev_put(struct inet6_dev *idev)
243{
244 atomic_dec(&idev->refcnt);
245}
1da177e4 246
48daa3bb
ED		 247static inline void in6_dev_hold(struct inet6_dev *idev)
248{
249 atomic_inc(&idev->refcnt);
250}
1da177e4
LT		 251
252extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
253
254static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
255{
256 if (atomic_dec_and_test(&ifp->refcnt))
257 inet6_ifa_finish_destroy(ifp);
258}
259
48daa3bb
ED		 260static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
261{
262 atomic_dec(&ifp->refcnt);
263}
1da177e4 264
48daa3bb
ED		 265static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
266{
267 atomic_inc(&ifp->refcnt);
268}
1da177e4 269
1da177e4
LT		 270
271/*
272 * compute link-local solicited-node multicast address
273 */
274
275static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
276 struct in6_addr *solicited)
277{
278 ipv6_addr_set(solicited,
0e7b8dcd
YH		 279 htonl(0xFF020000), 0,
280 htonl(0x1),
281 htonl(0xFF000000) | addr->s6_addr32[3]);
1da177e4
LT		 282}
283
b27b28cb 284static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
1da177e4 285{
0e7b8dcd 286 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
1da177e4
LT		 287}
288
b27b28cb 289static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
1da177e4 290{
48daa3bb 291 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
fed85383 292 addr->s6_addr32[1] | addr->s6_addr32[2] |
48daa3bb 293 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
1da177e4
LT		 294}
295
b27b28cb 296static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
1da177e4 297{
48daa3bb 298 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
fed85383 299 addr->s6_addr32[1] | addr->s6_addr32[2] |
48daa3bb 300 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
1da177e4
LT		 301}
302
b27b28cb 303static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
c7dc89c0 304{
48daa3bb 305 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
c7dc89c0
FT		 306}
307
ca97a644
YH		 308static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
309{
9d100774
YH		 310#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
311 __u64 *p = (__u64 *)addr;
312 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
313 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
314 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
315#else
316 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
317 addr->s6_addr32[1] |
318 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
319 (addr->s6_addr[12] ^ 0xff)) == 0;
320#endif
ca97a644
YH		 321}
322
20380731
ACM		 323#ifdef CONFIG_PROC_FS
324extern int if6_proc_init(void);
325extern void if6_proc_exit(void);
326#endif
327
1da177e4 328#endif
Linux kernel - Deliverables
This page took 0.694348 seconds and 5 git commands to generate.