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
);
153 extern bool ipv6_is_mld(struct sk_buff
*skb
, int nexthdr
);
155 extern void addrconf_prefix_rcv(struct net_device
*dev
,
156 u8
*opt
, int len
, bool sllao
);
159 * anycast prototypes (anycast.c)
161 extern int ipv6_sock_ac_join(struct sock
*sk
,int ifindex
, const struct in6_addr
*addr
);
162 extern int ipv6_sock_ac_drop(struct sock
*sk
,int ifindex
, const struct in6_addr
*addr
);
163 extern void ipv6_sock_ac_close(struct sock
*sk
);
165 extern int ipv6_dev_ac_inc(struct net_device
*dev
, const struct in6_addr
*addr
);
166 extern int __ipv6_dev_ac_dec(struct inet6_dev
*idev
, const struct in6_addr
*addr
);
167 extern bool ipv6_chk_acast_addr(struct net
*net
, struct net_device
*dev
,
168 const struct in6_addr
*addr
);
171 /* Device notifier */
172 extern int register_inet6addr_notifier(struct notifier_block
*nb
);
173 extern int unregister_inet6addr_notifier(struct notifier_block
*nb
);
176 * __in6_dev_get - get inet6_dev pointer from netdevice
177 * @dev: network device
179 * Caller must hold rcu_read_lock or RTNL, because this function
180 * does not take a reference on the inet6_dev.
182 static inline struct inet6_dev
*__in6_dev_get(const struct net_device
*dev
)
184 return rcu_dereference_rtnl(dev
->ip6_ptr
);
188 * in6_dev_get - get inet6_dev pointer from netdevice
189 * @dev: network device
191 * This version can be used in any context, and takes a reference
192 * on the inet6_dev. Callers must use in6_dev_put() later to
193 * release this reference.
195 static inline struct inet6_dev
*in6_dev_get(const struct net_device
*dev
)
197 struct inet6_dev
*idev
;
200 idev
= rcu_dereference(dev
->ip6_ptr
);
202 atomic_inc(&idev
->refcnt
);
207 extern void in6_dev_finish_destroy(struct inet6_dev
*idev
);
209 static inline void in6_dev_put(struct inet6_dev
*idev
)
211 if (atomic_dec_and_test(&idev
->refcnt
))
212 in6_dev_finish_destroy(idev
);
215 static inline void __in6_dev_put(struct inet6_dev
*idev
)
217 atomic_dec(&idev
->refcnt
);
220 static inline void in6_dev_hold(struct inet6_dev
*idev
)
222 atomic_inc(&idev
->refcnt
);
225 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
);
227 static inline void in6_ifa_put(struct inet6_ifaddr
*ifp
)
229 if (atomic_dec_and_test(&ifp
->refcnt
))
230 inet6_ifa_finish_destroy(ifp
);
233 static inline void __in6_ifa_put(struct inet6_ifaddr
*ifp
)
235 atomic_dec(&ifp
->refcnt
);
238 static inline void in6_ifa_hold(struct inet6_ifaddr
*ifp
)
240 atomic_inc(&ifp
->refcnt
);
245 * compute link-local solicited-node multicast address
248 static inline void addrconf_addr_solict_mult(const struct in6_addr
*addr
,
249 struct in6_addr
*solicited
)
251 ipv6_addr_set(solicited
,
252 htonl(0xFF020000), 0,
254 htonl(0xFF000000) | addr
->s6_addr32
[3]);
257 static inline int ipv6_addr_is_multicast(const struct in6_addr
*addr
)
259 return (addr
->s6_addr32
[0] & htonl(0xFF000000)) == htonl(0xFF000000);
262 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr
*addr
)
264 return ((addr
->s6_addr32
[0] ^ htonl(0xff020000)) |
265 addr
->s6_addr32
[1] | addr
->s6_addr32
[2] |
266 (addr
->s6_addr32
[3] ^ htonl(0x00000001))) == 0;
269 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr
*addr
)
271 return ((addr
->s6_addr32
[0] ^ htonl(0xff020000)) |
272 addr
->s6_addr32
[1] | addr
->s6_addr32
[2] |
273 (addr
->s6_addr32
[3] ^ htonl(0x00000002))) == 0;
276 static inline int ipv6_addr_is_isatap(const struct in6_addr
*addr
)
278 return (addr
->s6_addr32
[2] | htonl(0x02000000)) == htonl(0x02005EFE);
281 #ifdef CONFIG_PROC_FS
282 extern int if6_proc_init(void);
283 extern void if6_proc_exit(void);