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);