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 bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
71 const unsigned int prefix_len,
72 struct net_device *dev);
74 int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
76 struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
77 const struct in6_addr *addr,
78 struct net_device *dev, int strict);
80 int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
81 const struct in6_addr *daddr, unsigned int srcprefs,
82 struct in6_addr *saddr);
83 int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
85 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
87 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2);
88 void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
89 void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
91 static inline unsigned long addrconf_timeout_fixup(u32 timeout,
94 if (timeout == 0xffffffff)
98 * Avoid arithmetic overflow.
99 * Assuming unit is constant and non-zero, this "if" statement
100 * will go away on 64bit archs.
102 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
103 return LONG_MAX / unit;
108 static inline int addrconf_finite_timeout(unsigned long timeout)
114 * IPv6 Address Label subsystem (addrlabel.c)
116 int ipv6_addr_label_init(void);
117 void ipv6_addr_label_cleanup(void);
118 void ipv6_addr_label_rtnl_register(void);
119 u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
120 int type, int ifindex);
123 * multicast prototypes (mcast.c)
125 int ipv6_sock_mc_join(struct sock *sk, int ifindex,
126 const struct in6_addr *addr);
127 int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
128 const struct in6_addr *addr);
129 void ipv6_sock_mc_close(struct sock *sk);
130 bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
131 const struct in6_addr *src_addr);
133 int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
134 int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
135 int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
136 void ipv6_mc_up(struct inet6_dev *idev);
137 void ipv6_mc_down(struct inet6_dev *idev);
138 void ipv6_mc_unmap(struct inet6_dev *idev);
139 void ipv6_mc_remap(struct inet6_dev *idev);
140 void ipv6_mc_init_dev(struct inet6_dev *idev);
141 void ipv6_mc_destroy_dev(struct inet6_dev *idev);
142 void addrconf_dad_failure(struct inet6_ifaddr *ifp);
144 bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
145 const struct in6_addr *src_addr);
147 void ipv6_mc_dad_complete(struct inet6_dev *idev);
149 /* A stub used by vxlan module. This is ugly, ideally these
150 * symbols should be built into the core kernel.
153 int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
154 const struct in6_addr *addr);
155 int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
156 const struct in6_addr *addr);
157 int (*ipv6_dst_lookup)(struct sock *sk, struct dst_entry **dst,
159 void (*udpv6_encap_enable)(void);
160 void (*ndisc_send_na)(struct net_device *dev, struct neighbour *neigh,
161 const struct in6_addr *daddr,
162 const struct in6_addr *solicited_addr,
163 bool router, bool solicited, bool override, bool inc_opt);
164 struct neigh_table *nd_tbl;
166 extern const struct ipv6_stub *ipv6_stub __read_mostly;
169 * identify MLD packets for MLD filter exceptions
171 static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
173 struct icmp6hdr *hdr;
175 if (nexthdr != IPPROTO_ICMPV6 ||
176 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
179 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
181 switch (hdr->icmp6_type) {
182 case ICMPV6_MGM_QUERY:
183 case ICMPV6_MGM_REPORT:
184 case ICMPV6_MGM_REDUCTION:
185 case ICMPV6_MLD2_REPORT:
193 void addrconf_prefix_rcv(struct net_device *dev,
194 u8 *opt, int len, bool sllao);
197 * anycast prototypes (anycast.c)
199 int ipv6_sock_ac_join(struct sock *sk, int ifindex,
200 const struct in6_addr *addr);
201 int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
202 const struct in6_addr *addr);
203 void ipv6_sock_ac_close(struct sock *sk);
205 int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
206 int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
207 bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
208 const struct in6_addr *addr);
211 /* Device notifier */
212 int register_inet6addr_notifier(struct notifier_block *nb);
213 int unregister_inet6addr_notifier(struct notifier_block *nb);
214 int inet6addr_notifier_call_chain(unsigned long val, void *v);
216 void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
217 struct ipv6_devconf *devconf);
220 * __in6_dev_get - get inet6_dev pointer from netdevice
221 * @dev: network device
223 * Caller must hold rcu_read_lock or RTNL, because this function
224 * does not take a reference on the inet6_dev.
226 static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
228 return rcu_dereference_rtnl(dev->ip6_ptr);
232 * in6_dev_get - get inet6_dev pointer from netdevice
233 * @dev: network device
235 * This version can be used in any context, and takes a reference
236 * on the inet6_dev. Callers must use in6_dev_put() later to
237 * release this reference.
239 static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
241 struct inet6_dev *idev;
244 idev = rcu_dereference(dev->ip6_ptr);
246 atomic_inc(&idev->refcnt);
251 static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
253 struct inet6_dev *idev = __in6_dev_get(dev);
255 return idev ? idev->nd_parms : NULL;
258 void in6_dev_finish_destroy(struct inet6_dev *idev);
260 static inline void in6_dev_put(struct inet6_dev *idev)
262 if (atomic_dec_and_test(&idev->refcnt))
263 in6_dev_finish_destroy(idev);
266 static inline void __in6_dev_put(struct inet6_dev *idev)
268 atomic_dec(&idev->refcnt);
271 static inline void in6_dev_hold(struct inet6_dev *idev)
273 atomic_inc(&idev->refcnt);
276 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
278 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
280 if (atomic_dec_and_test(&ifp->refcnt))
281 inet6_ifa_finish_destroy(ifp);
284 static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
286 atomic_dec(&ifp->refcnt);
289 static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
291 atomic_inc(&ifp->refcnt);
296 * compute link-local solicited-node multicast address
299 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
300 struct in6_addr *solicited)
302 ipv6_addr_set(solicited,
303 htonl(0xFF020000), 0,
305 htonl(0xFF000000) | addr->s6_addr32[3]);
308 static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
310 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
313 static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
315 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
316 __u64 *p = (__u64 *)addr;
317 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
319 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
320 addr->s6_addr32[1] | addr->s6_addr32[2] |
321 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
325 static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
327 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
328 __u64 *p = (__u64 *)addr;
329 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
331 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
332 addr->s6_addr32[1] | addr->s6_addr32[2] |
333 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
337 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
339 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
342 static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
344 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
345 __u64 *p = (__u64 *)addr;
346 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
347 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
348 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
350 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
352 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
353 (addr->s6_addr[12] ^ 0xff)) == 0;
357 #ifdef CONFIG_PROC_FS
358 int if6_proc_init(void);
359 void if6_proc_exit(void);