4 #define MAX_RTR_SOLICITATIONS 3
5 #define RTR_SOLICITATION_INTERVAL (4*HZ)
7 #define MIN_VALID_LIFETIME (2*3600) /* 2 hours */
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)
14 #define ADDR_CHECK_FREQUENCY (120*HZ)
16 #define IPV6_MAX_ADDRESSES 16
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)
23 #include <linux/in6.h>
30 #if defined(__BIG_ENDIAN_BITFIELD)
34 #elif defined(__LITTLE_ENDIAN_BITFIELD)
39 #error "Please fix <asm/byteorder.h>"
45 struct in6_addr prefix
;
49 #include <linux/netdevice.h>
50 #include <net/if_inet6.h>
53 #define IN6_ADDR_HSIZE_SHIFT 4
54 #define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
56 extern int addrconf_init(void);
57 extern void addrconf_cleanup(void);
59 extern int addrconf_add_ifaddr(struct net
*net
,
61 extern int addrconf_del_ifaddr(struct net
*net
,
63 extern int addrconf_set_dstaddr(struct net
*net
,
66 extern int ipv6_chk_addr(struct net
*net
,
67 const struct in6_addr
*addr
,
68 const struct net_device
*dev
,
71 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
72 extern int ipv6_chk_home_addr(struct net
*net
,
73 const struct in6_addr
*addr
);
76 bool ipv6_chk_custom_prefix(const struct in6_addr
*addr
,
77 const unsigned int prefix_len
,
78 struct net_device
*dev
);
80 extern int ipv6_chk_prefix(const struct in6_addr
*addr
,
81 struct net_device
*dev
);
83 extern struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
,
84 const struct in6_addr
*addr
,
85 struct net_device
*dev
,
88 extern int ipv6_dev_get_saddr(struct net
*net
,
89 const struct net_device
*dev
,
90 const struct in6_addr
*daddr
,
91 unsigned int srcprefs
,
92 struct in6_addr
*saddr
);
93 extern int __ipv6_get_lladdr(struct inet6_dev
*idev
,
94 struct in6_addr
*addr
,
95 unsigned char banned_flags
);
96 extern int ipv6_get_lladdr(struct net_device
*dev
,
97 struct in6_addr
*addr
,
98 unsigned char banned_flags
);
99 extern int ipv6_rcv_saddr_equal(const struct sock
*sk
,
100 const struct sock
*sk2
);
101 extern void addrconf_join_solict(struct net_device
*dev
,
102 const struct in6_addr
*addr
);
103 extern void addrconf_leave_solict(struct inet6_dev
*idev
,
104 const struct in6_addr
*addr
);
106 static inline unsigned long addrconf_timeout_fixup(u32 timeout
,
109 if (timeout
== 0xffffffff)
113 * Avoid arithmetic overflow.
114 * Assuming unit is constant and non-zero, this "if" statement
115 * will go away on 64bit archs.
117 if (0xfffffffe > LONG_MAX
/ unit
&& timeout
> LONG_MAX
/ unit
)
118 return LONG_MAX
/ unit
;
123 static inline int addrconf_finite_timeout(unsigned long timeout
)
129 * IPv6 Address Label subsystem (addrlabel.c)
131 extern int ipv6_addr_label_init(void);
132 extern void ipv6_addr_label_cleanup(void);
133 extern void ipv6_addr_label_rtnl_register(void);
134 extern u32
ipv6_addr_label(struct net
*net
,
135 const struct in6_addr
*addr
,
136 int type
, int ifindex
);
139 * multicast prototypes (mcast.c)
141 extern int ipv6_sock_mc_join(struct sock
*sk
, int ifindex
,
142 const struct in6_addr
*addr
);
143 extern int ipv6_sock_mc_drop(struct sock
*sk
, int ifindex
,
144 const struct in6_addr
*addr
);
145 extern void ipv6_sock_mc_close(struct sock
*sk
);
146 extern bool inet6_mc_check(struct sock
*sk
,
147 const struct in6_addr
*mc_addr
,
148 const struct in6_addr
*src_addr
);
150 extern int ipv6_dev_mc_inc(struct net_device
*dev
, const struct in6_addr
*addr
);
151 extern int __ipv6_dev_mc_dec(struct inet6_dev
*idev
, const struct in6_addr
*addr
);
152 extern int ipv6_dev_mc_dec(struct net_device
*dev
, const struct in6_addr
*addr
);
153 extern void ipv6_mc_up(struct inet6_dev
*idev
);
154 extern void ipv6_mc_down(struct inet6_dev
*idev
);
155 extern void ipv6_mc_unmap(struct inet6_dev
*idev
);
156 extern void ipv6_mc_remap(struct inet6_dev
*idev
);
157 extern void ipv6_mc_init_dev(struct inet6_dev
*idev
);
158 extern void ipv6_mc_destroy_dev(struct inet6_dev
*idev
);
159 extern void addrconf_dad_failure(struct inet6_ifaddr
*ifp
);
161 extern bool ipv6_chk_mcast_addr(struct net_device
*dev
,
162 const struct in6_addr
*group
,
163 const struct in6_addr
*src_addr
);
166 * identify MLD packets for MLD filter exceptions
168 static inline bool ipv6_is_mld(struct sk_buff
*skb
, int nexthdr
, int offset
)
170 struct icmp6hdr
*hdr
;
172 if (nexthdr
!= IPPROTO_ICMPV6
||
173 !pskb_network_may_pull(skb
, offset
+ sizeof(struct icmp6hdr
)))
176 hdr
= (struct icmp6hdr
*)(skb_network_header(skb
) + offset
);
178 switch (hdr
->icmp6_type
) {
179 case ICMPV6_MGM_QUERY
:
180 case ICMPV6_MGM_REPORT
:
181 case ICMPV6_MGM_REDUCTION
:
182 case ICMPV6_MLD2_REPORT
:
190 extern void addrconf_prefix_rcv(struct net_device
*dev
,
191 u8
*opt
, int len
, bool sllao
);
193 u32
addrconf_rt_table(const struct net_device
*dev
, u32 default_table
);
196 * anycast prototypes (anycast.c)
198 extern int ipv6_sock_ac_join(struct sock
*sk
,int ifindex
, const struct in6_addr
*addr
);
199 extern int ipv6_sock_ac_drop(struct sock
*sk
,int ifindex
, const struct in6_addr
*addr
);
200 extern void ipv6_sock_ac_close(struct sock
*sk
);
202 extern int ipv6_dev_ac_inc(struct net_device
*dev
, const struct in6_addr
*addr
);
203 extern int __ipv6_dev_ac_dec(struct inet6_dev
*idev
, const struct in6_addr
*addr
);
204 extern bool ipv6_chk_acast_addr(struct net
*net
, struct net_device
*dev
,
205 const struct in6_addr
*addr
);
208 /* Device notifier */
209 extern int register_inet6addr_notifier(struct notifier_block
*nb
);
210 extern int unregister_inet6addr_notifier(struct notifier_block
*nb
);
211 extern int inet6addr_notifier_call_chain(unsigned long val
, void *v
);
213 extern void inet6_netconf_notify_devconf(struct net
*net
, int type
, int ifindex
,
214 struct ipv6_devconf
*devconf
);
217 * __in6_dev_get - get inet6_dev pointer from netdevice
218 * @dev: network device
220 * Caller must hold rcu_read_lock or RTNL, because this function
221 * does not take a reference on the inet6_dev.
223 static inline struct inet6_dev
*__in6_dev_get(const struct net_device
*dev
)
225 return rcu_dereference_rtnl(dev
->ip6_ptr
);
229 * in6_dev_get - get inet6_dev pointer from netdevice
230 * @dev: network device
232 * This version can be used in any context, and takes a reference
233 * on the inet6_dev. Callers must use in6_dev_put() later to
234 * release this reference.
236 static inline struct inet6_dev
*in6_dev_get(const struct net_device
*dev
)
238 struct inet6_dev
*idev
;
241 idev
= rcu_dereference(dev
->ip6_ptr
);
243 atomic_inc(&idev
->refcnt
);
248 extern void in6_dev_finish_destroy(struct inet6_dev
*idev
);
250 static inline void in6_dev_put(struct inet6_dev
*idev
)
252 if (atomic_dec_and_test(&idev
->refcnt
))
253 in6_dev_finish_destroy(idev
);
256 static inline void __in6_dev_put(struct inet6_dev
*idev
)
258 atomic_dec(&idev
->refcnt
);
261 static inline void in6_dev_hold(struct inet6_dev
*idev
)
263 atomic_inc(&idev
->refcnt
);
266 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
);
268 static inline void in6_ifa_put(struct inet6_ifaddr
*ifp
)
270 if (atomic_dec_and_test(&ifp
->refcnt
))
271 inet6_ifa_finish_destroy(ifp
);
274 static inline void __in6_ifa_put(struct inet6_ifaddr
*ifp
)
276 atomic_dec(&ifp
->refcnt
);
279 static inline void in6_ifa_hold(struct inet6_ifaddr
*ifp
)
281 atomic_inc(&ifp
->refcnt
);
286 * compute link-local solicited-node multicast address
289 static inline void addrconf_addr_solict_mult(const struct in6_addr
*addr
,
290 struct in6_addr
*solicited
)
292 ipv6_addr_set(solicited
,
293 htonl(0xFF020000), 0,
295 htonl(0xFF000000) | addr
->s6_addr32
[3]);
298 static inline bool ipv6_addr_is_multicast(const struct in6_addr
*addr
)
300 return (addr
->s6_addr32
[0] & htonl(0xFF000000)) == htonl(0xFF000000);
303 static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr
*addr
)
305 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
306 __u64
*p
= (__u64
*)addr
;
307 return ((p
[0] ^ cpu_to_be64(0xff02000000000000UL
)) | (p
[1] ^ cpu_to_be64(1))) == 0UL;
309 return ((addr
->s6_addr32
[0] ^ htonl(0xff020000)) |
310 addr
->s6_addr32
[1] | addr
->s6_addr32
[2] |
311 (addr
->s6_addr32
[3] ^ htonl(0x00000001))) == 0;
315 static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr
*addr
)
317 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
318 __u64
*p
= (__u64
*)addr
;
319 return ((p
[0] ^ cpu_to_be64(0xff02000000000000UL
)) | (p
[1] ^ cpu_to_be64(2))) == 0UL;
321 return ((addr
->s6_addr32
[0] ^ htonl(0xff020000)) |
322 addr
->s6_addr32
[1] | addr
->s6_addr32
[2] |
323 (addr
->s6_addr32
[3] ^ htonl(0x00000002))) == 0;
327 static inline bool ipv6_addr_is_isatap(const struct in6_addr
*addr
)
329 return (addr
->s6_addr32
[2] | htonl(0x02000000)) == htonl(0x02005EFE);
332 static inline bool ipv6_addr_is_solict_mult(const struct in6_addr
*addr
)
334 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
335 __u64
*p
= (__u64
*)addr
;
336 return ((p
[0] ^ cpu_to_be64(0xff02000000000000UL
)) |
337 ((p
[1] ^ cpu_to_be64(0x00000001ff000000UL
)) &
338 cpu_to_be64(0xffffffffff000000UL
))) == 0UL;
340 return ((addr
->s6_addr32
[0] ^ htonl(0xff020000)) |
342 (addr
->s6_addr32
[2] ^ htonl(0x00000001)) |
343 (addr
->s6_addr
[12] ^ 0xff)) == 0;
347 #ifdef CONFIG_PROC_FS
348 extern int if6_proc_init(void);
349 extern void if6_proc_exit(void);