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;
51 #include <linux/netdevice.h>
52 #include <net/if_inet6.h>
55 struct in6_validator_info {
56 struct in6_addr i6vi_addr;
57 struct inet6_dev *i6vi_dev;
60 #define IN6_ADDR_HSIZE_SHIFT 4
61 #define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
63 int addrconf_init(void);
64 void addrconf_cleanup(void);
66 int addrconf_add_ifaddr(struct net *net, void __user *arg);
67 int addrconf_del_ifaddr(struct net *net, void __user *arg);
68 int addrconf_set_dstaddr(struct net *net, void __user *arg);
70 int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
71 const struct net_device *dev, int strict);
72 int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
73 const struct net_device *dev, int strict,
76 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
77 int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
80 bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
81 const unsigned int prefix_len,
82 struct net_device *dev);
84 int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
86 struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
87 const struct in6_addr *addr,
88 struct net_device *dev, int strict);
90 int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
91 const struct in6_addr *daddr, unsigned int srcprefs,
92 struct in6_addr *saddr);
93 int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
95 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
97 int inet_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
99 void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
100 void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
102 void addrconf_add_linklocal(struct inet6_dev *idev,
103 const struct in6_addr *addr, u32 flags);
105 int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
106 const struct prefix_info *pinfo,
107 struct inet6_dev *in6_dev,
108 const struct in6_addr *addr, int addr_type,
109 u32 addr_flags, bool sllao, bool tokenized,
110 __u32 valid_lft, u32 prefered_lft);
112 static inline void addrconf_addr_eui48_base(u8 *eui, const char *const addr)
114 memcpy(eui, addr, 3);
117 memcpy(eui + 5, addr + 3, 3);
120 static inline void addrconf_addr_eui48(u8 *eui, const char *const addr)
122 addrconf_addr_eui48_base(eui, addr);
126 static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
128 if (dev->addr_len != ETH_ALEN)
132 * The zSeries OSA network cards can be shared among various
133 * OS instances, but the OSA cards have only one MAC address.
134 * This leads to duplicate address conflicts in conjunction
135 * with IPv6 if more than one instance uses the same card.
137 * The driver for these cards can deliver a unique 16-bit
138 * identifier for each instance sharing the same card. It is
139 * placed instead of 0xFFFE in the interface identifier. The
140 * "u" bit of the interface identifier is not inverted in this
141 * case. Hence the resulting interface identifier has local
142 * scope according to RFC2373.
145 addrconf_addr_eui48_base(eui, dev->dev_addr);
148 eui[3] = (dev->dev_id >> 8) & 0xFF;
149 eui[4] = dev->dev_id & 0xFF;
157 static inline unsigned long addrconf_timeout_fixup(u32 timeout,
160 if (timeout == 0xffffffff)
164 * Avoid arithmetic overflow.
165 * Assuming unit is constant and non-zero, this "if" statement
166 * will go away on 64bit archs.
168 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
169 return LONG_MAX / unit;
174 static inline int addrconf_finite_timeout(unsigned long timeout)
180 * IPv6 Address Label subsystem (addrlabel.c)
182 int ipv6_addr_label_init(void);
183 void ipv6_addr_label_cleanup(void);
184 void ipv6_addr_label_rtnl_register(void);
185 u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
186 int type, int ifindex);
189 * multicast prototypes (mcast.c)
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 void __ipv6_sock_mc_close(struct sock *sk);
196 void ipv6_sock_mc_close(struct sock *sk);
197 bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
198 const struct in6_addr *src_addr);
200 int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
201 int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
202 int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
203 void ipv6_mc_up(struct inet6_dev *idev);
204 void ipv6_mc_down(struct inet6_dev *idev);
205 void ipv6_mc_unmap(struct inet6_dev *idev);
206 void ipv6_mc_remap(struct inet6_dev *idev);
207 void ipv6_mc_init_dev(struct inet6_dev *idev);
208 void ipv6_mc_destroy_dev(struct inet6_dev *idev);
209 int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
210 void addrconf_dad_failure(struct inet6_ifaddr *ifp);
212 bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
213 const struct in6_addr *src_addr);
215 void ipv6_mc_dad_complete(struct inet6_dev *idev);
217 /* A stub used by vxlan module. This is ugly, ideally these
218 * symbols should be built into the core kernel.
221 int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
222 const struct in6_addr *addr);
223 int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
224 const struct in6_addr *addr);
225 int (*ipv6_dst_lookup)(struct net *net, struct sock *sk,
226 struct dst_entry **dst, struct flowi6 *fl6);
227 void (*udpv6_encap_enable)(void);
228 void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
229 const struct in6_addr *solicited_addr,
230 bool router, bool solicited, bool override, bool inc_opt);
231 struct neigh_table *nd_tbl;
233 extern const struct ipv6_stub *ipv6_stub __read_mostly;
236 * identify MLD packets for MLD filter exceptions
238 static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
240 struct icmp6hdr *hdr;
242 if (nexthdr != IPPROTO_ICMPV6 ||
243 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
246 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
248 switch (hdr->icmp6_type) {
249 case ICMPV6_MGM_QUERY:
250 case ICMPV6_MGM_REPORT:
251 case ICMPV6_MGM_REDUCTION:
252 case ICMPV6_MLD2_REPORT:
260 void addrconf_prefix_rcv(struct net_device *dev,
261 u8 *opt, int len, bool sllao);
264 * anycast prototypes (anycast.c)
266 int ipv6_sock_ac_join(struct sock *sk, int ifindex,
267 const struct in6_addr *addr);
268 int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
269 const struct in6_addr *addr);
270 void ipv6_sock_ac_close(struct sock *sk);
272 int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
273 int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
274 void ipv6_ac_destroy_dev(struct inet6_dev *idev);
275 bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
276 const struct in6_addr *addr);
277 bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
278 const struct in6_addr *addr);
280 /* Device notifier */
281 int register_inet6addr_notifier(struct notifier_block *nb);
282 int unregister_inet6addr_notifier(struct notifier_block *nb);
283 int inet6addr_notifier_call_chain(unsigned long val, void *v);
285 int register_inet6addr_validator_notifier(struct notifier_block *nb);
286 int unregister_inet6addr_validator_notifier(struct notifier_block *nb);
287 int inet6addr_validator_notifier_call_chain(unsigned long val, void *v);
289 void inet6_netconf_notify_devconf(struct net *net, int event, int type,
290 int ifindex, struct ipv6_devconf *devconf);
293 * __in6_dev_get - get inet6_dev pointer from netdevice
294 * @dev: network device
296 * Caller must hold rcu_read_lock or RTNL, because this function
297 * does not take a reference on the inet6_dev.
299 static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
301 return rcu_dereference_rtnl(dev->ip6_ptr);
305 * in6_dev_get - get inet6_dev pointer from netdevice
306 * @dev: network device
308 * This version can be used in any context, and takes a reference
309 * on the inet6_dev. Callers must use in6_dev_put() later to
310 * release this reference.
312 static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
314 struct inet6_dev *idev;
317 idev = rcu_dereference(dev->ip6_ptr);
319 refcount_inc(&idev->refcnt);
324 static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
326 struct inet6_dev *idev = __in6_dev_get(dev);
328 return idev ? idev->nd_parms : NULL;
331 void in6_dev_finish_destroy(struct inet6_dev *idev);
333 static inline void in6_dev_put(struct inet6_dev *idev)
335 if (refcount_dec_and_test(&idev->refcnt))
336 in6_dev_finish_destroy(idev);
339 static inline void __in6_dev_put(struct inet6_dev *idev)
341 refcount_dec(&idev->refcnt);
344 static inline void in6_dev_hold(struct inet6_dev *idev)
346 refcount_inc(&idev->refcnt);
349 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
351 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
353 if (refcount_dec_and_test(&ifp->refcnt))
354 inet6_ifa_finish_destroy(ifp);
357 static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
359 refcount_dec(&ifp->refcnt);
362 static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
364 refcount_inc(&ifp->refcnt);
369 * compute link-local solicited-node multicast address
372 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
373 struct in6_addr *solicited)
375 ipv6_addr_set(solicited,
376 htonl(0xFF020000), 0,
378 htonl(0xFF000000) | addr->s6_addr32[3]);
381 static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
383 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
384 __be64 *p = (__be64 *)addr;
385 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
387 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
388 addr->s6_addr32[1] | addr->s6_addr32[2] |
389 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
393 static inline bool ipv6_addr_is_ll_all_routers(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)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
399 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
400 addr->s6_addr32[1] | addr->s6_addr32[2] |
401 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
405 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
407 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
410 static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
412 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
413 __be64 *p = (__be64 *)addr;
414 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
415 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
416 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
418 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
420 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
421 (addr->s6_addr[12] ^ 0xff)) == 0;
425 #ifdef CONFIG_PROC_FS
426 int if6_proc_init(void);
427 void if6_proc_exit(void);