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)
24 #include <linux/in6.h>
31 #if defined(__BIG_ENDIAN_BITFIELD)
35 #elif defined(__LITTLE_ENDIAN_BITFIELD)
40 #error "Please fix <asm/byteorder.h>"
46 struct in6_addr prefix;
50 #include <linux/netdevice.h>
51 #include <net/if_inet6.h>
54 #define IN6_ADDR_HSIZE_SHIFT 4
55 #define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
57 int addrconf_init(void);
58 void addrconf_cleanup(void);
60 int addrconf_add_ifaddr(struct net *net, void __user *arg);
61 int addrconf_del_ifaddr(struct net *net, void __user *arg);
62 int addrconf_set_dstaddr(struct net *net, void __user *arg);
64 int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
65 const struct net_device *dev, int strict);
66 int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
67 const struct net_device *dev, int strict,
70 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
71 int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
74 bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
75 const unsigned int prefix_len,
76 struct net_device *dev);
78 int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
80 struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
81 const struct in6_addr *addr,
82 struct net_device *dev, int strict);
84 int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
85 const struct in6_addr *daddr, unsigned int srcprefs,
86 struct in6_addr *saddr);
87 int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
89 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
91 int ipv4_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
93 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
95 void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
96 void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
98 void addrconf_add_linklocal(struct inet6_dev *idev,
99 const struct in6_addr *addr, u32 flags);
101 int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
102 const struct prefix_info *pinfo,
103 struct inet6_dev *in6_dev,
104 const struct in6_addr *addr, int addr_type,
105 u32 addr_flags, bool sllao, bool tokenized,
106 __u32 valid_lft, u32 prefered_lft);
108 static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
110 if (dev->addr_len != ETH_ALEN)
112 memcpy(eui, dev->dev_addr, 3);
113 memcpy(eui + 5, dev->dev_addr + 3, 3);
116 * The zSeries OSA network cards can be shared among various
117 * OS instances, but the OSA cards have only one MAC address.
118 * This leads to duplicate address conflicts in conjunction
119 * with IPv6 if more than one instance uses the same card.
121 * The driver for these cards can deliver a unique 16-bit
122 * identifier for each instance sharing the same card. It is
123 * placed instead of 0xFFFE in the interface identifier. The
124 * "u" bit of the interface identifier is not inverted in this
125 * case. Hence the resulting interface identifier has local
126 * scope according to RFC2373.
129 eui[3] = (dev->dev_id >> 8) & 0xFF;
130 eui[4] = dev->dev_id & 0xFF;
139 static inline unsigned long addrconf_timeout_fixup(u32 timeout,
142 if (timeout == 0xffffffff)
146 * Avoid arithmetic overflow.
147 * Assuming unit is constant and non-zero, this "if" statement
148 * will go away on 64bit archs.
150 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
151 return LONG_MAX / unit;
156 static inline int addrconf_finite_timeout(unsigned long timeout)
162 * IPv6 Address Label subsystem (addrlabel.c)
164 int ipv6_addr_label_init(void);
165 void ipv6_addr_label_cleanup(void);
166 void ipv6_addr_label_rtnl_register(void);
167 u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
168 int type, int ifindex);
171 * multicast prototypes (mcast.c)
173 int ipv6_sock_mc_join(struct sock *sk, int ifindex,
174 const struct in6_addr *addr);
175 int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
176 const struct in6_addr *addr);
177 void ipv6_sock_mc_close(struct sock *sk);
178 bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
179 const struct in6_addr *src_addr);
181 int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
182 int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
183 int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
184 void ipv6_mc_up(struct inet6_dev *idev);
185 void ipv6_mc_down(struct inet6_dev *idev);
186 void ipv6_mc_unmap(struct inet6_dev *idev);
187 void ipv6_mc_remap(struct inet6_dev *idev);
188 void ipv6_mc_init_dev(struct inet6_dev *idev);
189 void ipv6_mc_destroy_dev(struct inet6_dev *idev);
190 int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
191 void addrconf_dad_failure(struct inet6_ifaddr *ifp);
193 bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
194 const struct in6_addr *src_addr);
196 void ipv6_mc_dad_complete(struct inet6_dev *idev);
198 /* A stub used by vxlan module. This is ugly, ideally these
199 * symbols should be built into the core kernel.
202 int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
203 const struct in6_addr *addr);
204 int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
205 const struct in6_addr *addr);
206 int (*ipv6_dst_lookup)(struct net *net, struct sock *sk,
207 struct dst_entry **dst, struct flowi6 *fl6);
208 void (*udpv6_encap_enable)(void);
209 void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
210 const struct in6_addr *solicited_addr,
211 bool router, bool solicited, bool override, bool inc_opt);
212 struct neigh_table *nd_tbl;
214 extern const struct ipv6_stub *ipv6_stub __read_mostly;
217 * identify MLD packets for MLD filter exceptions
219 static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
221 struct icmp6hdr *hdr;
223 if (nexthdr != IPPROTO_ICMPV6 ||
224 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
227 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
229 switch (hdr->icmp6_type) {
230 case ICMPV6_MGM_QUERY:
231 case ICMPV6_MGM_REPORT:
232 case ICMPV6_MGM_REDUCTION:
233 case ICMPV6_MLD2_REPORT:
241 void addrconf_prefix_rcv(struct net_device *dev,
242 u8 *opt, int len, bool sllao);
245 * anycast prototypes (anycast.c)
247 int ipv6_sock_ac_join(struct sock *sk, int ifindex,
248 const struct in6_addr *addr);
249 int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
250 const struct in6_addr *addr);
251 void ipv6_sock_ac_close(struct sock *sk);
253 int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
254 int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
255 void ipv6_ac_destroy_dev(struct inet6_dev *idev);
256 bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
257 const struct in6_addr *addr);
258 bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
259 const struct in6_addr *addr);
261 /* Device notifier */
262 int register_inet6addr_notifier(struct notifier_block *nb);
263 int unregister_inet6addr_notifier(struct notifier_block *nb);
264 int inet6addr_notifier_call_chain(unsigned long val, void *v);
266 void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
267 struct ipv6_devconf *devconf);
270 * __in6_dev_get - get inet6_dev pointer from netdevice
271 * @dev: network device
273 * Caller must hold rcu_read_lock or RTNL, because this function
274 * does not take a reference on the inet6_dev.
276 static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
278 return rcu_dereference_rtnl(dev->ip6_ptr);
282 * in6_dev_get - get inet6_dev pointer from netdevice
283 * @dev: network device
285 * This version can be used in any context, and takes a reference
286 * on the inet6_dev. Callers must use in6_dev_put() later to
287 * release this reference.
289 static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
291 struct inet6_dev *idev;
294 idev = rcu_dereference(dev->ip6_ptr);
296 atomic_inc(&idev->refcnt);
301 static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
303 struct inet6_dev *idev = __in6_dev_get(dev);
305 return idev ? idev->nd_parms : NULL;
308 void in6_dev_finish_destroy(struct inet6_dev *idev);
310 static inline void in6_dev_put(struct inet6_dev *idev)
312 if (atomic_dec_and_test(&idev->refcnt))
313 in6_dev_finish_destroy(idev);
316 static inline void __in6_dev_put(struct inet6_dev *idev)
318 atomic_dec(&idev->refcnt);
321 static inline void in6_dev_hold(struct inet6_dev *idev)
323 atomic_inc(&idev->refcnt);
326 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
328 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
330 if (atomic_dec_and_test(&ifp->refcnt))
331 inet6_ifa_finish_destroy(ifp);
334 static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
336 atomic_dec(&ifp->refcnt);
339 static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
341 atomic_inc(&ifp->refcnt);
346 * compute link-local solicited-node multicast address
349 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
350 struct in6_addr *solicited)
352 ipv6_addr_set(solicited,
353 htonl(0xFF020000), 0,
355 htonl(0xFF000000) | addr->s6_addr32[3]);
358 static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
360 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
361 __be64 *p = (__be64 *)addr;
362 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
364 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
365 addr->s6_addr32[1] | addr->s6_addr32[2] |
366 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
370 static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
372 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
373 __be64 *p = (__be64 *)addr;
374 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
376 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
377 addr->s6_addr32[1] | addr->s6_addr32[2] |
378 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
382 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
384 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
387 static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
389 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
390 __be64 *p = (__be64 *)addr;
391 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
392 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
393 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
395 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
397 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
398 (addr->s6_addr[12] ^ 0xff)) == 0;
402 #ifdef CONFIG_PROC_FS
403 int if6_proc_init(void);
404 void if6_proc_exit(void);