]>
git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/net/addrconf.h
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 int addrconf_init(void);
57 void addrconf_cleanup(void);
59 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
);
60 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
);
61 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
);
63 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
64 const struct net_device
*dev
, int strict
);
66 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
67 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
);
70 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
);
72 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
,
73 const struct in6_addr
*addr
,
74 struct net_device
*dev
, int strict
);
76 int ipv6_dev_get_saddr(struct net
*net
, const struct net_device
*dev
,
77 const struct in6_addr
*daddr
, unsigned int srcprefs
,
78 struct in6_addr
*saddr
);
79 int __ipv6_get_lladdr(struct inet6_dev
*idev
, struct in6_addr
*addr
,
80 unsigned char banned_flags
);
81 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
82 unsigned char banned_flags
);
83 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
);
84 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
);
85 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
);
87 static inline unsigned long addrconf_timeout_fixup(u32 timeout
,
90 if (timeout
== 0xffffffff)
94 * Avoid arithmetic overflow.
95 * Assuming unit is constant and non-zero, this "if" statement
96 * will go away on 64bit archs.
98 if (0xfffffffe > LONG_MAX
/ unit
&& timeout
> LONG_MAX
/ unit
)
99 return LONG_MAX
/ unit
;
104 static inline int addrconf_finite_timeout(unsigned long timeout
)
110 * IPv6 Address Label subsystem (addrlabel.c)
112 int ipv6_addr_label_init(void);
113 void ipv6_addr_label_cleanup(void);
114 void ipv6_addr_label_rtnl_register(void);
115 u32
ipv6_addr_label(struct net
*net
, const struct in6_addr
*addr
,
116 int type
, int ifindex
);
119 * multicast prototypes (mcast.c)
121 int ipv6_sock_mc_join(struct sock
*sk
, int ifindex
,
122 const struct in6_addr
*addr
);
123 int ipv6_sock_mc_drop(struct sock
*sk
, int ifindex
,
124 const struct in6_addr
*addr
);
125 void ipv6_sock_mc_close(struct sock
*sk
);
126 bool inet6_mc_check(struct sock
*sk
, const struct in6_addr
*mc_addr
,
127 const struct in6_addr
*src_addr
);
129 int ipv6_dev_mc_inc(struct net_device
*dev
, const struct in6_addr
*addr
);
130 int __ipv6_dev_mc_dec(struct inet6_dev
*idev
, const struct in6_addr
*addr
);
131 int ipv6_dev_mc_dec(struct net_device
*dev
, const struct in6_addr
*addr
);
132 void ipv6_mc_up(struct inet6_dev
*idev
);
133 void ipv6_mc_down(struct inet6_dev
*idev
);
134 void ipv6_mc_unmap(struct inet6_dev
*idev
);
135 void ipv6_mc_remap(struct inet6_dev
*idev
);
136 void ipv6_mc_init_dev(struct inet6_dev
*idev
);
137 void ipv6_mc_destroy_dev(struct inet6_dev
*idev
);
138 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
);
140 bool ipv6_chk_mcast_addr(struct net_device
*dev
, const struct in6_addr
*group
,
141 const struct in6_addr
*src_addr
);
143 void ipv6_mc_dad_complete(struct inet6_dev
*idev
);
145 /* A stub used by vxlan module. This is ugly, ideally these
146 * symbols should be built into the core kernel.
149 int (*ipv6_sock_mc_join
)(struct sock
*sk
, int ifindex
,
150 const struct in6_addr
*addr
);
151 int (*ipv6_sock_mc_drop
)(struct sock
*sk
, int ifindex
,
152 const struct in6_addr
*addr
);
153 int (*ipv6_dst_lookup
)(struct sock
*sk
, struct dst_entry
**dst
,
155 void (*udpv6_encap_enable
)(void);
156 void (*ndisc_send_na
)(struct net_device
*dev
, struct neighbour
*neigh
,
157 const struct in6_addr
*daddr
,
158 const struct in6_addr
*solicited_addr
,
159 bool router
, bool solicited
, bool override
, bool inc_opt
);
160 struct neigh_table
*nd_tbl
;
162 extern const struct ipv6_stub
*ipv6_stub __read_mostly
;
165 * identify MLD packets for MLD filter exceptions
167 static inline bool ipv6_is_mld(struct sk_buff
*skb
, int nexthdr
, int offset
)
169 struct icmp6hdr
*hdr
;
171 if (nexthdr
!= IPPROTO_ICMPV6
||
172 !pskb_network_may_pull(skb
, offset
+ sizeof(struct icmp6hdr
)))
175 hdr
= (struct icmp6hdr
*)(skb_network_header(skb
) + offset
);
177 switch (hdr
->icmp6_type
) {
178 case ICMPV6_MGM_QUERY
:
179 case ICMPV6_MGM_REPORT
:
180 case ICMPV6_MGM_REDUCTION
:
181 case ICMPV6_MLD2_REPORT
:
189 void addrconf_prefix_rcv(struct net_device
*dev
,
190 u8
*opt
, int len
, bool sllao
);
193 * anycast prototypes (anycast.c)
195 int ipv6_sock_ac_join(struct sock
*sk
, int ifindex
,
196 const struct in6_addr
*addr
);
197 int ipv6_sock_ac_drop(struct sock
*sk
, int ifindex
,
198 const struct in6_addr
*addr
);
199 void ipv6_sock_ac_close(struct sock
*sk
);
201 int ipv6_dev_ac_inc(struct net_device
*dev
, const struct in6_addr
*addr
);
202 int __ipv6_dev_ac_dec(struct inet6_dev
*idev
, const struct in6_addr
*addr
);
203 bool ipv6_chk_acast_addr(struct net
*net
, struct net_device
*dev
,
204 const struct in6_addr
*addr
);
207 /* Device notifier */
208 int register_inet6addr_notifier(struct notifier_block
*nb
);
209 int unregister_inet6addr_notifier(struct notifier_block
*nb
);
210 int inet6addr_notifier_call_chain(unsigned long val
, void *v
);
212 void inet6_netconf_notify_devconf(struct net
*net
, int type
, int ifindex
,
213 struct ipv6_devconf
*devconf
);
216 * __in6_dev_get - get inet6_dev pointer from netdevice
217 * @dev: network device
219 * Caller must hold rcu_read_lock or RTNL, because this function
220 * does not take a reference on the inet6_dev.
222 static inline struct inet6_dev
*__in6_dev_get(const struct net_device
*dev
)
224 return rcu_dereference_rtnl(dev
->ip6_ptr
);
228 * in6_dev_get - get inet6_dev pointer from netdevice
229 * @dev: network device
231 * This version can be used in any context, and takes a reference
232 * on the inet6_dev. Callers must use in6_dev_put() later to
233 * release this reference.
235 static inline struct inet6_dev
*in6_dev_get(const struct net_device
*dev
)
237 struct inet6_dev
*idev
;
240 idev
= rcu_dereference(dev
->ip6_ptr
);
242 atomic_inc(&idev
->refcnt
);
247 void in6_dev_finish_destroy(struct inet6_dev
*idev
);
249 static inline void in6_dev_put(struct inet6_dev
*idev
)
251 if (atomic_dec_and_test(&idev
->refcnt
))
252 in6_dev_finish_destroy(idev
);
255 static inline void __in6_dev_put(struct inet6_dev
*idev
)
257 atomic_dec(&idev
->refcnt
);
260 static inline void in6_dev_hold(struct inet6_dev
*idev
)
262 atomic_inc(&idev
->refcnt
);
265 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
);
267 static inline void in6_ifa_put(struct inet6_ifaddr
*ifp
)
269 if (atomic_dec_and_test(&ifp
->refcnt
))
270 inet6_ifa_finish_destroy(ifp
);
273 static inline void __in6_ifa_put(struct inet6_ifaddr
*ifp
)
275 atomic_dec(&ifp
->refcnt
);
278 static inline void in6_ifa_hold(struct inet6_ifaddr
*ifp
)
280 atomic_inc(&ifp
->refcnt
);
285 * compute link-local solicited-node multicast address
288 static inline void addrconf_addr_solict_mult(const struct in6_addr
*addr
,
289 struct in6_addr
*solicited
)
291 ipv6_addr_set(solicited
,
292 htonl(0xFF020000), 0,
294 htonl(0xFF000000) | addr
->s6_addr32
[3]);
297 static inline bool ipv6_addr_is_multicast(const struct in6_addr
*addr
)
299 return (addr
->s6_addr32
[0] & htonl(0xFF000000)) == htonl(0xFF000000);
302 static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr
*addr
)
304 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
305 __u64
*p
= (__u64
*)addr
;
306 return ((p
[0] ^ cpu_to_be64(0xff02000000000000UL
)) | (p
[1] ^ cpu_to_be64(1))) == 0UL;
308 return ((addr
->s6_addr32
[0] ^ htonl(0xff020000)) |
309 addr
->s6_addr32
[1] | addr
->s6_addr32
[2] |
310 (addr
->s6_addr32
[3] ^ htonl(0x00000001))) == 0;
314 static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr
*addr
)
316 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
317 __u64
*p
= (__u64
*)addr
;
318 return ((p
[0] ^ cpu_to_be64(0xff02000000000000UL
)) | (p
[1] ^ cpu_to_be64(2))) == 0UL;
320 return ((addr
->s6_addr32
[0] ^ htonl(0xff020000)) |
321 addr
->s6_addr32
[1] | addr
->s6_addr32
[2] |
322 (addr
->s6_addr32
[3] ^ htonl(0x00000002))) == 0;
326 static inline bool ipv6_addr_is_isatap(const struct in6_addr
*addr
)
328 return (addr
->s6_addr32
[2] | htonl(0x02000000)) == htonl(0x02005EFE);
331 static inline bool ipv6_addr_is_solict_mult(const struct in6_addr
*addr
)
333 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
334 __u64
*p
= (__u64
*)addr
;
335 return ((p
[0] ^ cpu_to_be64(0xff02000000000000UL
)) |
336 ((p
[1] ^ cpu_to_be64(0x00000001ff000000UL
)) &
337 cpu_to_be64(0xffffffffff000000UL
))) == 0UL;
339 return ((addr
->s6_addr32
[0] ^ htonl(0xff020000)) |
341 (addr
->s6_addr32
[2] ^ htonl(0x00000001)) |
342 (addr
->s6_addr
[12] ^ 0xff)) == 0;
346 #ifdef CONFIG_PROC_FS
347 int if6_proc_init(void);
348 void if6_proc_exit(void);