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);
66 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
67 int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
70 int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
72 struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
73 const struct in6_addr *addr,
74 struct net_device *dev, int strict);
76 int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
77 const struct in6_addr *daddr, unsigned int srcprefs,
78 struct in6_addr *saddr);
79 int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
80 unsigned char banned_flags);
81 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
82 unsigned char banned_flags);
83 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2);
84 void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
85 void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
87 static inline unsigned long addrconf_timeout_fixup(u32 timeout,
90 if (timeout == 0xffffffff)
94 * Avoid arithmetic overflow.
95 * Assuming unit is constant and non-zero, this "if" statement
96 * will go away on 64bit archs.
98 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
99 return LONG_MAX / unit;
104 static inline int addrconf_finite_timeout(unsigned long timeout)
110 * IPv6 Address Label subsystem (addrlabel.c)
112 int ipv6_addr_label_init(void);
113 void ipv6_addr_label_cleanup(void);
114 void ipv6_addr_label_rtnl_register(void);
115 u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
116 int type, int ifindex);
119 * multicast prototypes (mcast.c)
121 int ipv6_sock_mc_join(struct sock *sk, int ifindex,
122 const struct in6_addr *addr);
123 int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
124 const struct in6_addr *addr);
125 void ipv6_sock_mc_close(struct sock *sk);
126 bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
127 const struct in6_addr *src_addr);
129 int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
130 int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
131 int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
132 void ipv6_mc_up(struct inet6_dev *idev);
133 void ipv6_mc_down(struct inet6_dev *idev);
134 void ipv6_mc_unmap(struct inet6_dev *idev);
135 void ipv6_mc_remap(struct inet6_dev *idev);
136 void ipv6_mc_init_dev(struct inet6_dev *idev);
137 void ipv6_mc_destroy_dev(struct inet6_dev *idev);
138 void addrconf_dad_failure(struct inet6_ifaddr *ifp);
140 bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
141 const struct in6_addr *src_addr);
143 void ipv6_mc_dad_complete(struct inet6_dev *idev);
145 /* A stub used by vxlan module. This is ugly, ideally these
146 * symbols should be built into the core kernel.
149 int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
150 const struct in6_addr *addr);
151 int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
152 const struct in6_addr *addr);
153 int (*ipv6_dst_lookup)(struct sock *sk, struct dst_entry **dst,
155 void (*udpv6_encap_enable)(void);
156 void (*ndisc_send_na)(struct net_device *dev, struct neighbour *neigh,
157 const struct in6_addr *daddr,
158 const struct in6_addr *solicited_addr,
159 bool router, bool solicited, bool override, bool inc_opt);
160 struct neigh_table *nd_tbl;
162 extern const struct ipv6_stub *ipv6_stub __read_mostly;
165 * identify MLD packets for MLD filter exceptions
167 static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
169 struct icmp6hdr *hdr;
171 if (nexthdr != IPPROTO_ICMPV6 ||
172 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
175 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
177 switch (hdr->icmp6_type) {
178 case ICMPV6_MGM_QUERY:
179 case ICMPV6_MGM_REPORT:
180 case ICMPV6_MGM_REDUCTION:
181 case ICMPV6_MLD2_REPORT:
189 void addrconf_prefix_rcv(struct net_device *dev,
190 u8 *opt, int len, bool sllao);
193 * anycast prototypes (anycast.c)
195 int ipv6_sock_ac_join(struct sock *sk, int ifindex,
196 const struct in6_addr *addr);
197 int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
198 const struct in6_addr *addr);
199 void ipv6_sock_ac_close(struct sock *sk);
201 int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
202 int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
203 bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
204 const struct in6_addr *addr);
207 /* Device notifier */
208 int register_inet6addr_notifier(struct notifier_block *nb);
209 int unregister_inet6addr_notifier(struct notifier_block *nb);
210 int inet6addr_notifier_call_chain(unsigned long val, void *v);
212 void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
213 struct ipv6_devconf *devconf);
216 * __in6_dev_get - get inet6_dev pointer from netdevice
217 * @dev: network device
219 * Caller must hold rcu_read_lock or RTNL, because this function
220 * does not take a reference on the inet6_dev.
222 static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
224 return rcu_dereference_rtnl(dev->ip6_ptr);
228 * in6_dev_get - get inet6_dev pointer from netdevice
229 * @dev: network device
231 * This version can be used in any context, and takes a reference
232 * on the inet6_dev. Callers must use in6_dev_put() later to
233 * release this reference.
235 static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
237 struct inet6_dev *idev;
240 idev = rcu_dereference(dev->ip6_ptr);
242 atomic_inc(&idev->refcnt);
247 void in6_dev_finish_destroy(struct inet6_dev *idev);
249 static inline void in6_dev_put(struct inet6_dev *idev)
251 if (atomic_dec_and_test(&idev->refcnt))
252 in6_dev_finish_destroy(idev);
255 static inline void __in6_dev_put(struct inet6_dev *idev)
257 atomic_dec(&idev->refcnt);
260 static inline void in6_dev_hold(struct inet6_dev *idev)
262 atomic_inc(&idev->refcnt);
265 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
267 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
269 if (atomic_dec_and_test(&ifp->refcnt))
270 inet6_ifa_finish_destroy(ifp);
273 static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
275 atomic_dec(&ifp->refcnt);
278 static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
280 atomic_inc(&ifp->refcnt);
285 * compute link-local solicited-node multicast address
288 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
289 struct in6_addr *solicited)
291 ipv6_addr_set(solicited,
292 htonl(0xFF020000), 0,
294 htonl(0xFF000000) | addr->s6_addr32[3]);
297 static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
299 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
302 static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
304 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
305 __u64 *p = (__u64 *)addr;
306 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
308 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
309 addr->s6_addr32[1] | addr->s6_addr32[2] |
310 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
314 static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
316 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
317 __u64 *p = (__u64 *)addr;
318 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
320 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
321 addr->s6_addr32[1] | addr->s6_addr32[2] |
322 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
326 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
328 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
331 static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
333 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
334 __u64 *p = (__u64 *)addr;
335 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
336 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
337 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
339 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
341 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
342 (addr->s6_addr[12] ^ 0xff)) == 0;
346 #ifdef CONFIG_PROC_FS
347 int if6_proc_init(void);
348 void if6_proc_exit(void);