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)
22 #define ADDRCONF_NOTIFY_PRIORITY 0
25 #include <linux/in6.h>
32 #if defined(__BIG_ENDIAN_BITFIELD)
36 #elif defined(__LITTLE_ENDIAN_BITFIELD)
41 #error "Please fix <asm/byteorder.h>"
47 struct in6_addr prefix;
51 #include <linux/netdevice.h>
52 #include <net/if_inet6.h>
55 #define IN6_ADDR_HSIZE_SHIFT 4
56 #define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
58 int addrconf_init(void);
59 void addrconf_cleanup(void);
61 int addrconf_add_ifaddr(struct net *net, void __user *arg);
62 int addrconf_del_ifaddr(struct net *net, void __user *arg);
63 int addrconf_set_dstaddr(struct net *net, void __user *arg);
65 int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
66 const struct net_device *dev, int strict);
67 int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
68 const struct net_device *dev, int strict,
71 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
72 int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
75 bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
76 const unsigned int prefix_len,
77 struct net_device *dev);
79 int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
81 struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
82 const struct in6_addr *addr,
83 struct net_device *dev, int strict);
85 int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
86 const struct in6_addr *daddr, unsigned int srcprefs,
87 struct in6_addr *saddr);
88 int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
90 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
92 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2);
93 void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
94 void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
96 static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
98 if (dev->addr_len != ETH_ALEN)
100 memcpy(eui, dev->dev_addr, 3);
101 memcpy(eui + 5, dev->dev_addr + 3, 3);
104 * The zSeries OSA network cards can be shared among various
105 * OS instances, but the OSA cards have only one MAC address.
106 * This leads to duplicate address conflicts in conjunction
107 * with IPv6 if more than one instance uses the same card.
109 * The driver for these cards can deliver a unique 16-bit
110 * identifier for each instance sharing the same card. It is
111 * placed instead of 0xFFFE in the interface identifier. The
112 * "u" bit of the interface identifier is not inverted in this
113 * case. Hence the resulting interface identifier has local
114 * scope according to RFC2373.
117 eui[3] = (dev->dev_id >> 8) & 0xFF;
118 eui[4] = dev->dev_id & 0xFF;
127 static inline unsigned long addrconf_timeout_fixup(u32 timeout,
130 if (timeout == 0xffffffff)
134 * Avoid arithmetic overflow.
135 * Assuming unit is constant and non-zero, this "if" statement
136 * will go away on 64bit archs.
138 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
139 return LONG_MAX / unit;
144 static inline int addrconf_finite_timeout(unsigned long timeout)
150 * IPv6 Address Label subsystem (addrlabel.c)
152 int ipv6_addr_label_init(void);
153 void ipv6_addr_label_cleanup(void);
154 void ipv6_addr_label_rtnl_register(void);
155 u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
156 int type, int ifindex);
159 * multicast prototypes (mcast.c)
161 int ipv6_sock_mc_join(struct sock *sk, int ifindex,
162 const struct in6_addr *addr);
163 int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
164 const struct in6_addr *addr);
165 void __ipv6_sock_mc_close(struct sock *sk);
166 void ipv6_sock_mc_close(struct sock *sk);
167 bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
168 const struct in6_addr *src_addr);
170 int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
171 int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
172 int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
173 void ipv6_mc_up(struct inet6_dev *idev);
174 void ipv6_mc_down(struct inet6_dev *idev);
175 void ipv6_mc_unmap(struct inet6_dev *idev);
176 void ipv6_mc_remap(struct inet6_dev *idev);
177 void ipv6_mc_init_dev(struct inet6_dev *idev);
178 void ipv6_mc_destroy_dev(struct inet6_dev *idev);
179 int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
180 void addrconf_dad_failure(struct inet6_ifaddr *ifp);
182 bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
183 const struct in6_addr *src_addr);
185 void ipv6_mc_dad_complete(struct inet6_dev *idev);
187 /* A stub used by vxlan module. This is ugly, ideally these
188 * symbols should be built into the core kernel.
191 int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
192 const struct in6_addr *addr);
193 int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
194 const struct in6_addr *addr);
195 struct dst_entry *(*ipv6_dst_lookup_flow)(struct net *net,
196 const struct sock *sk,
198 const struct in6_addr *final_dst);
199 void (*udpv6_encap_enable)(void);
200 void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
201 const struct in6_addr *solicited_addr,
202 bool router, bool solicited, bool override, bool inc_opt);
203 struct neigh_table *nd_tbl;
205 extern const struct ipv6_stub *ipv6_stub __read_mostly;
208 * identify MLD packets for MLD filter exceptions
210 static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
212 struct icmp6hdr *hdr;
214 if (nexthdr != IPPROTO_ICMPV6 ||
215 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
218 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
220 switch (hdr->icmp6_type) {
221 case ICMPV6_MGM_QUERY:
222 case ICMPV6_MGM_REPORT:
223 case ICMPV6_MGM_REDUCTION:
224 case ICMPV6_MLD2_REPORT:
232 void addrconf_prefix_rcv(struct net_device *dev,
233 u8 *opt, int len, bool sllao);
236 * anycast prototypes (anycast.c)
238 int ipv6_sock_ac_join(struct sock *sk, int ifindex,
239 const struct in6_addr *addr);
240 int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
241 const struct in6_addr *addr);
242 void __ipv6_sock_ac_close(struct sock *sk);
243 void ipv6_sock_ac_close(struct sock *sk);
245 int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
246 int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
247 void ipv6_ac_destroy_dev(struct inet6_dev *idev);
248 bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
249 const struct in6_addr *addr);
250 bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
251 const struct in6_addr *addr);
253 /* Device notifier */
254 int register_inet6addr_notifier(struct notifier_block *nb);
255 int unregister_inet6addr_notifier(struct notifier_block *nb);
256 int inet6addr_notifier_call_chain(unsigned long val, void *v);
258 void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
259 struct ipv6_devconf *devconf);
262 * __in6_dev_get - get inet6_dev pointer from netdevice
263 * @dev: network device
265 * Caller must hold rcu_read_lock or RTNL, because this function
266 * does not take a reference on the inet6_dev.
268 static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
270 return rcu_dereference_rtnl(dev->ip6_ptr);
274 * in6_dev_get - get inet6_dev pointer from netdevice
275 * @dev: network device
277 * This version can be used in any context, and takes a reference
278 * on the inet6_dev. Callers must use in6_dev_put() later to
279 * release this reference.
281 static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
283 struct inet6_dev *idev;
286 idev = rcu_dereference(dev->ip6_ptr);
288 atomic_inc(&idev->refcnt);
293 static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
295 struct inet6_dev *idev = __in6_dev_get(dev);
297 return idev ? idev->nd_parms : NULL;
300 void in6_dev_finish_destroy(struct inet6_dev *idev);
302 static inline void in6_dev_put(struct inet6_dev *idev)
304 if (atomic_dec_and_test(&idev->refcnt))
305 in6_dev_finish_destroy(idev);
308 static inline void __in6_dev_put(struct inet6_dev *idev)
310 atomic_dec(&idev->refcnt);
313 static inline void in6_dev_hold(struct inet6_dev *idev)
315 atomic_inc(&idev->refcnt);
318 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
320 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
322 if (atomic_dec_and_test(&ifp->refcnt))
323 inet6_ifa_finish_destroy(ifp);
326 static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
328 atomic_dec(&ifp->refcnt);
331 static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
333 atomic_inc(&ifp->refcnt);
338 * compute link-local solicited-node multicast address
341 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
342 struct in6_addr *solicited)
344 ipv6_addr_set(solicited,
345 htonl(0xFF020000), 0,
347 htonl(0xFF000000) | addr->s6_addr32[3]);
350 static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
352 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
353 __be64 *p = (__be64 *)addr;
354 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
356 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
357 addr->s6_addr32[1] | addr->s6_addr32[2] |
358 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
362 static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
364 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
365 __be64 *p = (__be64 *)addr;
366 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
368 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
369 addr->s6_addr32[1] | addr->s6_addr32[2] |
370 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
374 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
376 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
379 static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
381 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
382 __be64 *p = (__be64 *)addr;
383 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
384 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
385 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
387 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
389 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
390 (addr->s6_addr[12] ^ 0xff)) == 0;
394 #ifdef CONFIG_PROC_FS
395 int if6_proc_init(void);
396 void if6_proc_exit(void);