4 #define MAX_RTR_SOLICITATIONS -1 /* unlimited */
5 #define RTR_SOLICITATION_INTERVAL (4*HZ)
6 #define RTR_SOLICITATION_MAX_INTERVAL (3600*HZ) /* 1 hour */
8 #define MIN_VALID_LIFETIME (2*3600) /* 2 hours */
10 #define TEMP_VALID_LIFETIME (7*86400)
11 #define TEMP_PREFERRED_LIFETIME (86400)
12 #define REGEN_MAX_RETRY (3)
13 #define MAX_DESYNC_FACTOR (600)
15 #define ADDR_CHECK_FREQUENCY (120*HZ)
17 #define IPV6_MAX_ADDRESSES 16
19 #define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1)
20 #define ADDRCONF_TIMER_FUZZ (HZ / 4)
21 #define ADDRCONF_TIMER_FUZZ_MAX (HZ)
23 #define ADDRCONF_NOTIFY_PRIORITY 0
26 #include <linux/in6.h>
33 #if defined(__BIG_ENDIAN_BITFIELD)
37 #elif defined(__LITTLE_ENDIAN_BITFIELD)
42 #error "Please fix <asm/byteorder.h>"
48 struct in6_addr prefix;
52 #include <linux/netdevice.h>
53 #include <net/if_inet6.h>
56 #define IN6_ADDR_HSIZE_SHIFT 4
57 #define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
59 int addrconf_init(void);
60 void addrconf_cleanup(void);
62 int addrconf_add_ifaddr(struct net *net, void __user *arg);
63 int addrconf_del_ifaddr(struct net *net, void __user *arg);
64 int addrconf_set_dstaddr(struct net *net, void __user *arg);
66 int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
67 const struct net_device *dev, int strict);
68 int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
69 const struct net_device *dev, int strict,
72 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
73 int ipv6_chk_home_addr(struct net *net, 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 int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
82 struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
83 const struct in6_addr *addr,
84 struct net_device *dev, int strict);
86 int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
87 const struct in6_addr *daddr, unsigned int srcprefs,
88 struct in6_addr *saddr);
89 int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
91 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
93 int ipv4_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
95 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
97 void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
98 void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
100 void addrconf_add_linklocal(struct inet6_dev *idev,
101 const struct in6_addr *addr, u32 flags);
103 int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
104 const struct prefix_info *pinfo,
105 struct inet6_dev *in6_dev,
106 const struct in6_addr *addr, int addr_type,
107 u32 addr_flags, bool sllao, bool tokenized,
108 __u32 valid_lft, u32 prefered_lft);
110 static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
112 if (dev->addr_len != ETH_ALEN)
114 memcpy(eui, dev->dev_addr, 3);
115 memcpy(eui + 5, dev->dev_addr + 3, 3);
118 * The zSeries OSA network cards can be shared among various
119 * OS instances, but the OSA cards have only one MAC address.
120 * This leads to duplicate address conflicts in conjunction
121 * with IPv6 if more than one instance uses the same card.
123 * The driver for these cards can deliver a unique 16-bit
124 * identifier for each instance sharing the same card. It is
125 * placed instead of 0xFFFE in the interface identifier. The
126 * "u" bit of the interface identifier is not inverted in this
127 * case. Hence the resulting interface identifier has local
128 * scope according to RFC2373.
131 eui[3] = (dev->dev_id >> 8) & 0xFF;
132 eui[4] = dev->dev_id & 0xFF;
141 static inline unsigned long addrconf_timeout_fixup(u32 timeout,
144 if (timeout == 0xffffffff)
148 * Avoid arithmetic overflow.
149 * Assuming unit is constant and non-zero, this "if" statement
150 * will go away on 64bit archs.
152 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
153 return LONG_MAX / unit;
158 static inline int addrconf_finite_timeout(unsigned long timeout)
164 * IPv6 Address Label subsystem (addrlabel.c)
166 int ipv6_addr_label_init(void);
167 void ipv6_addr_label_cleanup(void);
168 void ipv6_addr_label_rtnl_register(void);
169 u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
170 int type, int ifindex);
173 * multicast prototypes (mcast.c)
175 int ipv6_sock_mc_join(struct sock *sk, int ifindex,
176 const struct in6_addr *addr);
177 int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
178 const struct in6_addr *addr);
179 void __ipv6_sock_mc_close(struct sock *sk);
180 void ipv6_sock_mc_close(struct sock *sk);
181 bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
182 const struct in6_addr *src_addr);
184 int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
185 int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
186 int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
187 void ipv6_mc_up(struct inet6_dev *idev);
188 void ipv6_mc_down(struct inet6_dev *idev);
189 void ipv6_mc_unmap(struct inet6_dev *idev);
190 void ipv6_mc_remap(struct inet6_dev *idev);
191 void ipv6_mc_init_dev(struct inet6_dev *idev);
192 void ipv6_mc_destroy_dev(struct inet6_dev *idev);
193 int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
194 void addrconf_dad_failure(struct inet6_ifaddr *ifp);
196 bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
197 const struct in6_addr *src_addr);
199 void ipv6_mc_dad_complete(struct inet6_dev *idev);
201 /* A stub used by vxlan module. This is ugly, ideally these
202 * symbols should be built into the core kernel.
205 int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
206 const struct in6_addr *addr);
207 int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
208 const struct in6_addr *addr);
209 struct dst_entry *(*ipv6_dst_lookup_flow)(struct net *net,
210 const struct sock *sk,
212 const struct in6_addr *final_dst);
213 void (*udpv6_encap_enable)(void);
214 void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
215 const struct in6_addr *solicited_addr,
216 bool router, bool solicited, bool override, bool inc_opt);
217 struct neigh_table *nd_tbl;
219 extern const struct ipv6_stub *ipv6_stub __read_mostly;
222 * identify MLD packets for MLD filter exceptions
224 static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
226 struct icmp6hdr *hdr;
228 if (nexthdr != IPPROTO_ICMPV6 ||
229 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
232 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
234 switch (hdr->icmp6_type) {
235 case ICMPV6_MGM_QUERY:
236 case ICMPV6_MGM_REPORT:
237 case ICMPV6_MGM_REDUCTION:
238 case ICMPV6_MLD2_REPORT:
246 void addrconf_prefix_rcv(struct net_device *dev,
247 u8 *opt, int len, bool sllao);
250 * anycast prototypes (anycast.c)
252 int ipv6_sock_ac_join(struct sock *sk, int ifindex,
253 const struct in6_addr *addr);
254 int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
255 const struct in6_addr *addr);
256 void __ipv6_sock_ac_close(struct sock *sk);
257 void ipv6_sock_ac_close(struct sock *sk);
259 int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
260 int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
261 void ipv6_ac_destroy_dev(struct inet6_dev *idev);
262 bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
263 const struct in6_addr *addr);
264 bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
265 const struct in6_addr *addr);
267 /* Device notifier */
268 int register_inet6addr_notifier(struct notifier_block *nb);
269 int unregister_inet6addr_notifier(struct notifier_block *nb);
270 int inet6addr_notifier_call_chain(unsigned long val, void *v);
272 void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
273 struct ipv6_devconf *devconf);
276 * __in6_dev_get - get inet6_dev pointer from netdevice
277 * @dev: network device
279 * Caller must hold rcu_read_lock or RTNL, because this function
280 * does not take a reference on the inet6_dev.
282 static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
284 return rcu_dereference_rtnl(dev->ip6_ptr);
288 * in6_dev_get - get inet6_dev pointer from netdevice
289 * @dev: network device
291 * This version can be used in any context, and takes a reference
292 * on the inet6_dev. Callers must use in6_dev_put() later to
293 * release this reference.
295 static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
297 struct inet6_dev *idev;
300 idev = rcu_dereference(dev->ip6_ptr);
302 atomic_inc(&idev->refcnt);
307 static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
309 struct inet6_dev *idev = __in6_dev_get(dev);
311 return idev ? idev->nd_parms : NULL;
314 void in6_dev_finish_destroy(struct inet6_dev *idev);
316 static inline void in6_dev_put(struct inet6_dev *idev)
318 if (atomic_dec_and_test(&idev->refcnt))
319 in6_dev_finish_destroy(idev);
322 static inline void __in6_dev_put(struct inet6_dev *idev)
324 atomic_dec(&idev->refcnt);
327 static inline void in6_dev_hold(struct inet6_dev *idev)
329 atomic_inc(&idev->refcnt);
332 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
334 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
336 if (atomic_dec_and_test(&ifp->refcnt))
337 inet6_ifa_finish_destroy(ifp);
340 static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
342 atomic_dec(&ifp->refcnt);
345 static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
347 atomic_inc(&ifp->refcnt);
352 * compute link-local solicited-node multicast address
355 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
356 struct in6_addr *solicited)
358 ipv6_addr_set(solicited,
359 htonl(0xFF020000), 0,
361 htonl(0xFF000000) | addr->s6_addr32[3]);
364 static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
366 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
367 __be64 *p = (__be64 *)addr;
368 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
370 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
371 addr->s6_addr32[1] | addr->s6_addr32[2] |
372 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
376 static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
378 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
379 __be64 *p = (__be64 *)addr;
380 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
382 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
383 addr->s6_addr32[1] | addr->s6_addr32[2] |
384 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
388 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
390 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
393 static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
395 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
396 __be64 *p = (__be64 *)addr;
397 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
398 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
399 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
401 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
403 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
404 (addr->s6_addr[12] ^ 0xff)) == 0;
408 #ifdef CONFIG_PROC_FS
409 int if6_proc_init(void);
410 void if6_proc_exit(void);