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 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);
187 * anycast prototypes (anycast.c)
189 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr);
190 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr);
191 extern void ipv6_sock_ac_close(struct sock *sk);
193 extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
194 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
195 extern bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
196 const struct in6_addr *addr);
199 /* Device notifier */
200 extern int register_inet6addr_notifier(struct notifier_block *nb);
201 extern int unregister_inet6addr_notifier(struct notifier_block *nb);
203 extern void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
204 struct ipv6_devconf *devconf);
207 * __in6_dev_get - get inet6_dev pointer from netdevice
208 * @dev: network device
210 * Caller must hold rcu_read_lock or RTNL, because this function
211 * does not take a reference on the inet6_dev.
213 static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
215 return rcu_dereference_rtnl(dev->ip6_ptr);
219 * in6_dev_get - get inet6_dev pointer from netdevice
220 * @dev: network device
222 * This version can be used in any context, and takes a reference
223 * on the inet6_dev. Callers must use in6_dev_put() later to
224 * release this reference.
226 static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
228 struct inet6_dev *idev;
231 idev = rcu_dereference(dev->ip6_ptr);
233 atomic_inc(&idev->refcnt);
238 extern void in6_dev_finish_destroy(struct inet6_dev *idev);
240 static inline void in6_dev_put(struct inet6_dev *idev)
242 if (atomic_dec_and_test(&idev->refcnt))
243 in6_dev_finish_destroy(idev);
246 static inline void __in6_dev_put(struct inet6_dev *idev)
248 atomic_dec(&idev->refcnt);
251 static inline void in6_dev_hold(struct inet6_dev *idev)
253 atomic_inc(&idev->refcnt);
256 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
258 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
260 if (atomic_dec_and_test(&ifp->refcnt))
261 inet6_ifa_finish_destroy(ifp);
264 static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
266 atomic_dec(&ifp->refcnt);
269 static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
271 atomic_inc(&ifp->refcnt);
276 * compute link-local solicited-node multicast address
279 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
280 struct in6_addr *solicited)
282 ipv6_addr_set(solicited,
283 htonl(0xFF020000), 0,
285 htonl(0xFF000000) | addr->s6_addr32[3]);
288 static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
290 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
293 static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
295 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
296 __u64 *p = (__u64 *)addr;
297 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
299 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
300 addr->s6_addr32[1] | addr->s6_addr32[2] |
301 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
305 static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
307 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
308 __u64 *p = (__u64 *)addr;
309 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
311 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
312 addr->s6_addr32[1] | addr->s6_addr32[2] |
313 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
317 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
319 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
322 static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
324 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
325 __u64 *p = (__u64 *)addr;
326 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
327 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
328 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
330 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
332 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
333 (addr->s6_addr[12] ^ 0xff)) == 0;
337 #ifdef CONFIG_PROC_FS
338 extern int if6_proc_init(void);
339 extern void if6_proc_exit(void);