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 extern int ipv6_chk_prefix(const struct in6_addr *addr,
77 struct net_device *dev);
79 extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
80 const struct in6_addr *addr,
81 struct net_device *dev,
84 extern int ipv6_dev_get_saddr(struct net *net,
85 const struct net_device *dev,
86 const struct in6_addr *daddr,
87 unsigned int srcprefs,
88 struct in6_addr *saddr);
89 extern int ipv6_get_lladdr(struct net_device *dev,
90 struct in6_addr *addr,
91 unsigned char banned_flags);
92 extern int ipv6_rcv_saddr_equal(const struct sock *sk,
93 const struct sock *sk2);
94 extern void addrconf_join_solict(struct net_device *dev,
95 const struct in6_addr *addr);
96 extern void addrconf_leave_solict(struct inet6_dev *idev,
97 const struct in6_addr *addr);
99 static inline unsigned long addrconf_timeout_fixup(u32 timeout,
102 if (timeout == 0xffffffff)
106 * Avoid arithmetic overflow.
107 * Assuming unit is constant and non-zero, this "if" statement
108 * will go away on 64bit archs.
110 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
111 return LONG_MAX / unit;
116 static inline int addrconf_finite_timeout(unsigned long timeout)
122 * IPv6 Address Label subsystem (addrlabel.c)
124 extern int ipv6_addr_label_init(void);
125 extern void ipv6_addr_label_cleanup(void);
126 extern void ipv6_addr_label_rtnl_register(void);
127 extern u32 ipv6_addr_label(struct net *net,
128 const struct in6_addr *addr,
129 int type, int ifindex);
132 * multicast prototypes (mcast.c)
134 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
135 const struct in6_addr *addr);
136 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
137 const struct in6_addr *addr);
138 extern void ipv6_sock_mc_close(struct sock *sk);
139 extern bool inet6_mc_check(struct sock *sk,
140 const struct in6_addr *mc_addr,
141 const struct in6_addr *src_addr);
143 extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
144 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
145 extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
146 extern void ipv6_mc_up(struct inet6_dev *idev);
147 extern void ipv6_mc_down(struct inet6_dev *idev);
148 extern void ipv6_mc_unmap(struct inet6_dev *idev);
149 extern void ipv6_mc_remap(struct inet6_dev *idev);
150 extern void ipv6_mc_init_dev(struct inet6_dev *idev);
151 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
152 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
154 extern bool ipv6_chk_mcast_addr(struct net_device *dev,
155 const struct in6_addr *group,
156 const struct in6_addr *src_addr);
159 * identify MLD packets for MLD filter exceptions
161 static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
163 struct icmp6hdr *hdr;
165 if (nexthdr != IPPROTO_ICMPV6 ||
166 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
169 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
171 switch (hdr->icmp6_type) {
172 case ICMPV6_MGM_QUERY:
173 case ICMPV6_MGM_REPORT:
174 case ICMPV6_MGM_REDUCTION:
175 case ICMPV6_MLD2_REPORT:
183 extern void addrconf_prefix_rcv(struct net_device *dev,
184 u8 *opt, int len, bool sllao);
186 u32 addrconf_rt_table(const struct net_device *dev, u32 default_table);
189 * anycast prototypes (anycast.c)
191 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr);
192 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr);
193 extern void ipv6_sock_ac_close(struct sock *sk);
195 extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
196 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
197 extern bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
198 const struct in6_addr *addr);
199 extern void ipv6_ac_destroy_dev(struct inet6_dev *idev);
202 /* Device notifier */
203 extern int register_inet6addr_notifier(struct notifier_block *nb);
204 extern int unregister_inet6addr_notifier(struct notifier_block *nb);
205 extern int inet6addr_notifier_call_chain(unsigned long val, void *v);
207 extern void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
208 struct ipv6_devconf *devconf);
211 * __in6_dev_get - get inet6_dev pointer from netdevice
212 * @dev: network device
214 * Caller must hold rcu_read_lock or RTNL, because this function
215 * does not take a reference on the inet6_dev.
217 static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
219 return rcu_dereference_rtnl(dev->ip6_ptr);
223 * in6_dev_get - get inet6_dev pointer from netdevice
224 * @dev: network device
226 * This version can be used in any context, and takes a reference
227 * on the inet6_dev. Callers must use in6_dev_put() later to
228 * release this reference.
230 static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
232 struct inet6_dev *idev;
235 idev = rcu_dereference(dev->ip6_ptr);
237 atomic_inc(&idev->refcnt);
242 extern void in6_dev_finish_destroy(struct inet6_dev *idev);
244 static inline void in6_dev_put(struct inet6_dev *idev)
246 if (atomic_dec_and_test(&idev->refcnt))
247 in6_dev_finish_destroy(idev);
250 static inline void __in6_dev_put(struct inet6_dev *idev)
252 atomic_dec(&idev->refcnt);
255 static inline void in6_dev_hold(struct inet6_dev *idev)
257 atomic_inc(&idev->refcnt);
260 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
262 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
264 if (atomic_dec_and_test(&ifp->refcnt))
265 inet6_ifa_finish_destroy(ifp);
268 static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
270 atomic_dec(&ifp->refcnt);
273 static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
275 atomic_inc(&ifp->refcnt);
280 * compute link-local solicited-node multicast address
283 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
284 struct in6_addr *solicited)
286 ipv6_addr_set(solicited,
287 htonl(0xFF020000), 0,
289 htonl(0xFF000000) | addr->s6_addr32[3]);
292 static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
294 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
297 static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
299 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
300 __u64 *p = (__u64 *)addr;
301 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
303 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
304 addr->s6_addr32[1] | addr->s6_addr32[2] |
305 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
309 static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
311 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
312 __u64 *p = (__u64 *)addr;
313 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
315 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
316 addr->s6_addr32[1] | addr->s6_addr32[2] |
317 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
321 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
323 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
326 static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
328 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
329 __u64 *p = (__u64 *)addr;
330 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
331 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
332 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
334 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
336 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
337 (addr->s6_addr[12] ^ 0xff)) == 0;
341 #ifdef CONFIG_PROC_FS
342 extern int if6_proc_init(void);
343 extern void if6_proc_exit(void);