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);
65 int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
66 const struct net_device *dev, int strict,
69 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
70 int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
73 bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
74 const unsigned int prefix_len,
75 struct net_device *dev);
77 int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
79 struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
80 const struct in6_addr *addr,
81 struct net_device *dev, int strict);
83 int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
84 const struct in6_addr *daddr, unsigned int srcprefs,
85 struct in6_addr *saddr);
86 int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
88 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
90 int ipv4_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
92 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
94 void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
95 void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
97 void addrconf_add_linklocal(struct inet6_dev *idev,
98 const struct in6_addr *addr, u32 flags);
100 int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
101 const struct prefix_info *pinfo,
102 struct inet6_dev *in6_dev,
103 const struct in6_addr *addr, int addr_type,
104 u32 addr_flags, bool sllao, bool tokenized,
105 __u32 valid_lft, u32 prefered_lft);
107 static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
109 if (dev->addr_len != ETH_ALEN)
111 memcpy(eui, dev->dev_addr, 3);
112 memcpy(eui + 5, dev->dev_addr + 3, 3);
115 * The zSeries OSA network cards can be shared among various
116 * OS instances, but the OSA cards have only one MAC address.
117 * This leads to duplicate address conflicts in conjunction
118 * with IPv6 if more than one instance uses the same card.
120 * The driver for these cards can deliver a unique 16-bit
121 * identifier for each instance sharing the same card. It is
122 * placed instead of 0xFFFE in the interface identifier. The
123 * "u" bit of the interface identifier is not inverted in this
124 * case. Hence the resulting interface identifier has local
125 * scope according to RFC2373.
128 eui[3] = (dev->dev_id >> 8) & 0xFF;
129 eui[4] = dev->dev_id & 0xFF;
138 static inline unsigned long addrconf_timeout_fixup(u32 timeout,
141 if (timeout == 0xffffffff)
145 * Avoid arithmetic overflow.
146 * Assuming unit is constant and non-zero, this "if" statement
147 * will go away on 64bit archs.
149 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
150 return LONG_MAX / unit;
155 static inline int addrconf_finite_timeout(unsigned long timeout)
161 * IPv6 Address Label subsystem (addrlabel.c)
163 int ipv6_addr_label_init(void);
164 void ipv6_addr_label_cleanup(void);
165 void ipv6_addr_label_rtnl_register(void);
166 u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
167 int type, int ifindex);
170 * multicast prototypes (mcast.c)
172 int ipv6_sock_mc_join(struct sock *sk, int ifindex,
173 const struct in6_addr *addr);
174 int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
175 const struct in6_addr *addr);
176 void ipv6_sock_mc_close(struct sock *sk);
177 bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
178 const struct in6_addr *src_addr);
180 int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
181 int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
182 int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
183 void ipv6_mc_up(struct inet6_dev *idev);
184 void ipv6_mc_down(struct inet6_dev *idev);
185 void ipv6_mc_unmap(struct inet6_dev *idev);
186 void ipv6_mc_remap(struct inet6_dev *idev);
187 void ipv6_mc_init_dev(struct inet6_dev *idev);
188 void ipv6_mc_destroy_dev(struct inet6_dev *idev);
189 int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
190 void addrconf_dad_failure(struct inet6_ifaddr *ifp);
192 bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
193 const struct in6_addr *src_addr);
195 void ipv6_mc_dad_complete(struct inet6_dev *idev);
197 /* A stub used by vxlan module. This is ugly, ideally these
198 * symbols should be built into the core kernel.
201 int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
202 const struct in6_addr *addr);
203 int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
204 const struct in6_addr *addr);
205 int (*ipv6_dst_lookup)(struct net *net, struct sock *sk,
206 struct dst_entry **dst, struct flowi6 *fl6);
207 void (*udpv6_encap_enable)(void);
208 void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
209 const struct in6_addr *solicited_addr,
210 bool router, bool solicited, bool override, bool inc_opt);
211 struct neigh_table *nd_tbl;
213 extern const struct ipv6_stub *ipv6_stub __read_mostly;
216 * identify MLD packets for MLD filter exceptions
218 static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
220 struct icmp6hdr *hdr;
222 if (nexthdr != IPPROTO_ICMPV6 ||
223 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
226 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
228 switch (hdr->icmp6_type) {
229 case ICMPV6_MGM_QUERY:
230 case ICMPV6_MGM_REPORT:
231 case ICMPV6_MGM_REDUCTION:
232 case ICMPV6_MLD2_REPORT:
240 void addrconf_prefix_rcv(struct net_device *dev,
241 u8 *opt, int len, bool sllao);
244 * anycast prototypes (anycast.c)
246 int ipv6_sock_ac_join(struct sock *sk, int ifindex,
247 const struct in6_addr *addr);
248 int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
249 const struct in6_addr *addr);
250 void ipv6_sock_ac_close(struct sock *sk);
252 int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
253 int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
254 void ipv6_ac_destroy_dev(struct inet6_dev *idev);
255 bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
256 const struct in6_addr *addr);
257 bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
258 const struct in6_addr *addr);
260 /* Device notifier */
261 int register_inet6addr_notifier(struct notifier_block *nb);
262 int unregister_inet6addr_notifier(struct notifier_block *nb);
263 int inet6addr_notifier_call_chain(unsigned long val, void *v);
265 void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
266 struct ipv6_devconf *devconf);
269 * __in6_dev_get - get inet6_dev pointer from netdevice
270 * @dev: network device
272 * Caller must hold rcu_read_lock or RTNL, because this function
273 * does not take a reference on the inet6_dev.
275 static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
277 return rcu_dereference_rtnl(dev->ip6_ptr);
281 * in6_dev_get - get inet6_dev pointer from netdevice
282 * @dev: network device
284 * This version can be used in any context, and takes a reference
285 * on the inet6_dev. Callers must use in6_dev_put() later to
286 * release this reference.
288 static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
290 struct inet6_dev *idev;
293 idev = rcu_dereference(dev->ip6_ptr);
295 atomic_inc(&idev->refcnt);
300 static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
302 struct inet6_dev *idev = __in6_dev_get(dev);
304 return idev ? idev->nd_parms : NULL;
307 void in6_dev_finish_destroy(struct inet6_dev *idev);
309 static inline void in6_dev_put(struct inet6_dev *idev)
311 if (atomic_dec_and_test(&idev->refcnt))
312 in6_dev_finish_destroy(idev);
315 static inline void __in6_dev_put(struct inet6_dev *idev)
317 atomic_dec(&idev->refcnt);
320 static inline void in6_dev_hold(struct inet6_dev *idev)
322 atomic_inc(&idev->refcnt);
325 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
327 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
329 if (atomic_dec_and_test(&ifp->refcnt))
330 inet6_ifa_finish_destroy(ifp);
333 static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
335 atomic_dec(&ifp->refcnt);
338 static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
340 atomic_inc(&ifp->refcnt);
345 * compute link-local solicited-node multicast address
348 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
349 struct in6_addr *solicited)
351 ipv6_addr_set(solicited,
352 htonl(0xFF020000), 0,
354 htonl(0xFF000000) | addr->s6_addr32[3]);
357 static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
359 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
360 __be64 *p = (__be64 *)addr;
361 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
363 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
364 addr->s6_addr32[1] | addr->s6_addr32[2] |
365 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
369 static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
371 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
372 __be64 *p = (__be64 *)addr;
373 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
375 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
376 addr->s6_addr32[1] | addr->s6_addr32[2] |
377 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
381 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
383 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
386 static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
388 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
389 __be64 *p = (__be64 *)addr;
390 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
391 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
392 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
394 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
396 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
397 (addr->s6_addr[12] ^ 0xff)) == 0;
401 #ifdef CONFIG_PROC_FS
402 int if6_proc_init(void);
403 void if6_proc_exit(void);