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
19 #include <linux/in6.h>
26 #if defined(__BIG_ENDIAN_BITFIELD)
30 #elif defined(__LITTLE_ENDIAN_BITFIELD)
35 #error "Please fix <asm/byteorder.h>"
41 struct in6_addr prefix
;
45 #include <linux/netdevice.h>
46 #include <net/if_inet6.h>
49 #define IN6_ADDR_HSIZE_SHIFT 4
50 #define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
52 extern int addrconf_init(void);
53 extern void addrconf_cleanup(void);
55 extern int addrconf_add_ifaddr(struct net
*net
,
57 extern int addrconf_del_ifaddr(struct net
*net
,
59 extern int addrconf_set_dstaddr(struct net
*net
,
62 extern int ipv6_chk_addr(struct net
*net
,
63 const struct in6_addr
*addr
,
64 struct net_device
*dev
,
67 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
68 extern int ipv6_chk_home_addr(struct net
*net
,
69 const struct in6_addr
*addr
);
72 extern int ipv6_chk_prefix(const struct in6_addr
*addr
,
73 struct net_device
*dev
);
75 extern struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
,
76 const struct in6_addr
*addr
,
77 struct net_device
*dev
,
80 extern int ipv6_dev_get_saddr(struct net
*net
,
81 const struct net_device
*dev
,
82 const struct in6_addr
*daddr
,
83 unsigned int srcprefs
,
84 struct in6_addr
*saddr
);
85 extern int ipv6_get_lladdr(struct net_device
*dev
,
86 struct in6_addr
*addr
,
87 unsigned char banned_flags
);
88 extern int ipv6_rcv_saddr_equal(const struct sock
*sk
,
89 const struct sock
*sk2
);
90 extern void addrconf_join_solict(struct net_device
*dev
,
91 const struct in6_addr
*addr
);
92 extern void addrconf_leave_solict(struct inet6_dev
*idev
,
93 const struct in6_addr
*addr
);
95 static inline unsigned long addrconf_timeout_fixup(u32 timeout
,
98 if (timeout
== 0xffffffff)
102 * Avoid arithmetic overflow.
103 * Assuming unit is constant and non-zero, this "if" statement
104 * will go away on 64bit archs.
106 if (0xfffffffe > LONG_MAX
/ unit
&& timeout
> LONG_MAX
/ unit
)
107 return LONG_MAX
/ unit
;
112 static inline int addrconf_finite_timeout(unsigned long timeout
)
118 * IPv6 Address Label subsystem (addrlabel.c)
120 extern int ipv6_addr_label_init(void);
121 extern void ipv6_addr_label_cleanup(void);
122 extern void ipv6_addr_label_rtnl_register(void);
123 extern u32
ipv6_addr_label(struct net
*net
,
124 const struct in6_addr
*addr
,
125 int type
, int ifindex
);
128 * multicast prototypes (mcast.c)
130 extern int ipv6_sock_mc_join(struct sock
*sk
, int ifindex
,
131 const struct in6_addr
*addr
);
132 extern int ipv6_sock_mc_drop(struct sock
*sk
, int ifindex
,
133 const struct in6_addr
*addr
);
134 extern void ipv6_sock_mc_close(struct sock
*sk
);
135 extern bool inet6_mc_check(struct sock
*sk
,
136 const struct in6_addr
*mc_addr
,
137 const struct in6_addr
*src_addr
);
139 extern int ipv6_dev_mc_inc(struct net_device
*dev
, const struct in6_addr
*addr
);
140 extern int __ipv6_dev_mc_dec(struct inet6_dev
*idev
, const struct in6_addr
*addr
);
141 extern int ipv6_dev_mc_dec(struct net_device
*dev
, const struct in6_addr
*addr
);
142 extern void ipv6_mc_up(struct inet6_dev
*idev
);
143 extern void ipv6_mc_down(struct inet6_dev
*idev
);
144 extern void ipv6_mc_unmap(struct inet6_dev
*idev
);
145 extern void ipv6_mc_remap(struct inet6_dev
*idev
);
146 extern void ipv6_mc_init_dev(struct inet6_dev
*idev
);
147 extern void ipv6_mc_destroy_dev(struct inet6_dev
*idev
);
148 extern void addrconf_dad_failure(struct inet6_ifaddr
*ifp
);
150 extern bool ipv6_chk_mcast_addr(struct net_device
*dev
,
151 const struct in6_addr
*group
,
152 const struct in6_addr
*src_addr
);
155 * identify MLD packets for MLD filter exceptions
157 static inline bool ipv6_is_mld(struct sk_buff
*skb
, int nexthdr
, int offset
)
159 struct icmp6hdr
*hdr
;
161 if (nexthdr
!= IPPROTO_ICMPV6
||
162 !pskb_network_may_pull(skb
, offset
+ sizeof(struct icmp6hdr
)))
165 hdr
= (struct icmp6hdr
*)(skb_network_header(skb
) + offset
);
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
:
179 extern void addrconf_prefix_rcv(struct net_device
*dev
,
180 u8
*opt
, int len
, bool sllao
);
183 * anycast prototypes (anycast.c)
185 extern int ipv6_sock_ac_join(struct sock
*sk
,int ifindex
, const struct in6_addr
*addr
);
186 extern int ipv6_sock_ac_drop(struct sock
*sk
,int ifindex
, const struct in6_addr
*addr
);
187 extern void ipv6_sock_ac_close(struct sock
*sk
);
189 extern int ipv6_dev_ac_inc(struct net_device
*dev
, const struct in6_addr
*addr
);
190 extern int __ipv6_dev_ac_dec(struct inet6_dev
*idev
, const struct in6_addr
*addr
);
191 extern bool ipv6_chk_acast_addr(struct net
*net
, struct net_device
*dev
,
192 const struct in6_addr
*addr
);
195 /* Device notifier */
196 extern int register_inet6addr_notifier(struct notifier_block
*nb
);
197 extern int unregister_inet6addr_notifier(struct notifier_block
*nb
);
199 extern void inet6_netconf_notify_devconf(struct net
*net
, int type
, int ifindex
,
200 struct ipv6_devconf
*devconf
);
203 * __in6_dev_get - get inet6_dev pointer from netdevice
204 * @dev: network device
206 * Caller must hold rcu_read_lock or RTNL, because this function
207 * does not take a reference on the inet6_dev.
209 static inline struct inet6_dev
*__in6_dev_get(const struct net_device
*dev
)
211 return rcu_dereference_rtnl(dev
->ip6_ptr
);
215 * in6_dev_get - get inet6_dev pointer from netdevice
216 * @dev: network device
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.
222 static inline struct inet6_dev
*in6_dev_get(const struct net_device
*dev
)
224 struct inet6_dev
*idev
;
227 idev
= rcu_dereference(dev
->ip6_ptr
);
229 atomic_inc(&idev
->refcnt
);
234 extern void in6_dev_finish_destroy(struct inet6_dev
*idev
);
236 static inline void in6_dev_put(struct inet6_dev
*idev
)
238 if (atomic_dec_and_test(&idev
->refcnt
))
239 in6_dev_finish_destroy(idev
);
242 static inline void __in6_dev_put(struct inet6_dev
*idev
)
244 atomic_dec(&idev
->refcnt
);
247 static inline void in6_dev_hold(struct inet6_dev
*idev
)
249 atomic_inc(&idev
->refcnt
);
252 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
);
254 static inline void in6_ifa_put(struct inet6_ifaddr
*ifp
)
256 if (atomic_dec_and_test(&ifp
->refcnt
))
257 inet6_ifa_finish_destroy(ifp
);
260 static inline void __in6_ifa_put(struct inet6_ifaddr
*ifp
)
262 atomic_dec(&ifp
->refcnt
);
265 static inline void in6_ifa_hold(struct inet6_ifaddr
*ifp
)
267 atomic_inc(&ifp
->refcnt
);
272 * compute link-local solicited-node multicast address
275 static inline void addrconf_addr_solict_mult(const struct in6_addr
*addr
,
276 struct in6_addr
*solicited
)
278 ipv6_addr_set(solicited
,
279 htonl(0xFF020000), 0,
281 htonl(0xFF000000) | addr
->s6_addr32
[3]);
284 static inline bool ipv6_addr_is_multicast(const struct in6_addr
*addr
)
286 return (addr
->s6_addr32
[0] & htonl(0xFF000000)) == htonl(0xFF000000);
289 static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr
*addr
)
291 return ((addr
->s6_addr32
[0] ^ htonl(0xff020000)) |
292 addr
->s6_addr32
[1] | addr
->s6_addr32
[2] |
293 (addr
->s6_addr32
[3] ^ htonl(0x00000001))) == 0;
296 static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr
*addr
)
298 return ((addr
->s6_addr32
[0] ^ htonl(0xff020000)) |
299 addr
->s6_addr32
[1] | addr
->s6_addr32
[2] |
300 (addr
->s6_addr32
[3] ^ htonl(0x00000002))) == 0;
303 static inline bool ipv6_addr_is_isatap(const struct in6_addr
*addr
)
305 return (addr
->s6_addr32
[2] | htonl(0x02000000)) == htonl(0x02005EFE);
308 static inline bool ipv6_addr_is_solict_mult(const struct in6_addr
*addr
)
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;
316 return ((addr
->s6_addr32
[0] ^ htonl(0xff020000)) |
318 (addr
->s6_addr32
[2] ^ htonl(0x00000001)) |
319 (addr
->s6_addr
[12] ^ 0xff)) == 0;
323 #ifdef CONFIG_PROC_FS
324 extern int if6_proc_init(void);
325 extern void if6_proc_exit(void);
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