xref: /openbmc/linux/include/net/addrconf.h (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
1 #ifndef _ADDRCONF_H
2 #define _ADDRCONF_H
3 
4 #define RETRANS_TIMER	HZ
5 
6 #define MAX_RTR_SOLICITATIONS		3
7 #define RTR_SOLICITATION_INTERVAL	(4*HZ)
8 
9 #define MIN_VALID_LIFETIME		(2*3600)	/* 2 hours */
10 
11 #define TEMP_VALID_LIFETIME		(7*86400)
12 #define TEMP_PREFERRED_LIFETIME		(86400)
13 #define REGEN_MAX_RETRY			(5)
14 #define MAX_DESYNC_FACTOR		(600)
15 
16 #define ADDR_CHECK_FREQUENCY		(120*HZ)
17 
18 #define IPV6_MAX_ADDRESSES		16
19 
20 #include <linux/in6.h>
21 
22 struct prefix_info {
23 	__u8			type;
24 	__u8			length;
25 	__u8			prefix_len;
26 
27 #if defined(__BIG_ENDIAN_BITFIELD)
28 	__u8			onlink : 1,
29 			 	autoconf : 1,
30 				reserved : 6;
31 #elif defined(__LITTLE_ENDIAN_BITFIELD)
32 	__u8			reserved : 6,
33 				autoconf : 1,
34 				onlink : 1;
35 #else
36 #error "Please fix <asm/byteorder.h>"
37 #endif
38 	__u32			valid;
39 	__u32			prefered;
40 	__u32			reserved2;
41 
42 	struct in6_addr		prefix;
43 };
44 
45 
46 #ifdef __KERNEL__
47 
48 #include <linux/config.h>
49 #include <linux/netdevice.h>
50 #include <net/if_inet6.h>
51 #include <net/ipv6.h>
52 
53 #define IN6_ADDR_HSIZE		16
54 
55 extern int			addrconf_init(void);
56 extern void			addrconf_cleanup(void);
57 
58 extern int			addrconf_add_ifaddr(void __user *arg);
59 extern int			addrconf_del_ifaddr(void __user *arg);
60 extern int			addrconf_set_dstaddr(void __user *arg);
61 
62 extern int			ipv6_chk_addr(struct in6_addr *addr,
63 					      struct net_device *dev,
64 					      int strict);
65 extern struct inet6_ifaddr *	ipv6_get_ifaddr(struct in6_addr *addr,
66 						struct net_device *dev,
67 						int strict);
68 extern int			ipv6_get_saddr(struct dst_entry *dst,
69 					       struct in6_addr *daddr,
70 					       struct in6_addr *saddr);
71 extern int			ipv6_dev_get_saddr(struct net_device *dev,
72 					       struct in6_addr *daddr,
73 					       struct in6_addr *saddr);
74 extern int			ipv6_get_lladdr(struct net_device *dev, struct in6_addr *);
75 extern int			ipv6_rcv_saddr_equal(const struct sock *sk,
76 						      const struct sock *sk2);
77 extern void			addrconf_join_solict(struct net_device *dev,
78 					struct in6_addr *addr);
79 extern void			addrconf_leave_solict(struct inet6_dev *idev,
80 					struct in6_addr *addr);
81 
82 /*
83  *	multicast prototypes (mcast.c)
84  */
85 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
86 		  struct in6_addr *addr);
87 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
88 		  struct in6_addr *addr);
89 extern void ipv6_sock_mc_close(struct sock *sk);
90 extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
91 		struct in6_addr *src_addr);
92 
93 extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr);
94 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
95 extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr);
96 extern void ipv6_mc_up(struct inet6_dev *idev);
97 extern void ipv6_mc_down(struct inet6_dev *idev);
98 extern void ipv6_mc_init_dev(struct inet6_dev *idev);
99 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
100 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
101 
102 extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
103 		struct in6_addr *src_addr);
104 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
105 
106 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
107 
108 extern int ipv6_get_hoplimit(struct net_device *dev);
109 
110 /*
111  *	anycast prototypes (anycast.c)
112  */
113 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
114 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
115 extern void ipv6_sock_ac_close(struct sock *sk);
116 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
117 
118 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
119 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
120 extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr);
121 
122 
123 /* Device notifier */
124 extern int register_inet6addr_notifier(struct notifier_block *nb);
125 extern int unregister_inet6addr_notifier(struct notifier_block *nb);
126 
127 static inline struct inet6_dev *
128 __in6_dev_get(struct net_device *dev)
129 {
130 	return (struct inet6_dev *)dev->ip6_ptr;
131 }
132 
133 extern rwlock_t addrconf_lock;
134 
135 static inline struct inet6_dev *
136 in6_dev_get(struct net_device *dev)
137 {
138 	struct inet6_dev *idev = NULL;
139 	read_lock(&addrconf_lock);
140 	idev = dev->ip6_ptr;
141 	if (idev)
142 		atomic_inc(&idev->refcnt);
143 	read_unlock(&addrconf_lock);
144 	return idev;
145 }
146 
147 extern void in6_dev_finish_destroy(struct inet6_dev *idev);
148 
149 static inline void
150 in6_dev_put(struct inet6_dev *idev)
151 {
152 	if (atomic_dec_and_test(&idev->refcnt))
153 		in6_dev_finish_destroy(idev);
154 }
155 
156 #define __in6_dev_put(idev)  atomic_dec(&(idev)->refcnt)
157 #define in6_dev_hold(idev)   atomic_inc(&(idev)->refcnt)
158 
159 
160 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
161 
162 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
163 {
164 	if (atomic_dec_and_test(&ifp->refcnt))
165 		inet6_ifa_finish_destroy(ifp);
166 }
167 
168 #define __in6_ifa_put(ifp)	atomic_dec(&(ifp)->refcnt)
169 #define in6_ifa_hold(ifp)	atomic_inc(&(ifp)->refcnt)
170 
171 
172 extern void			addrconf_forwarding_on(void);
173 /*
174  *	Hash function taken from net_alias.c
175  */
176 
177 static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr)
178 {
179 	__u32 word;
180 
181 	/*
182 	 * We perform the hash function over the last 64 bits of the address
183 	 * This will include the IEEE address token on links that support it.
184 	 */
185 
186 	word = addr->s6_addr32[2] ^ addr->s6_addr32[3];
187 	word ^= (word >> 16);
188 	word ^= (word >> 8);
189 
190 	return ((word ^ (word >> 4)) & 0x0f);
191 }
192 
193 /*
194  *	compute link-local solicited-node multicast address
195  */
196 
197 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
198 					     struct in6_addr *solicited)
199 {
200 	ipv6_addr_set(solicited,
201 		      __constant_htonl(0xFF020000), 0,
202 		      __constant_htonl(0x1),
203 		      __constant_htonl(0xFF000000) | addr->s6_addr32[3]);
204 }
205 
206 
207 static inline void ipv6_addr_all_nodes(struct in6_addr *addr)
208 {
209 	ipv6_addr_set(addr,
210 		      __constant_htonl(0xFF020000), 0, 0,
211 		      __constant_htonl(0x1));
212 }
213 
214 static inline void ipv6_addr_all_routers(struct in6_addr *addr)
215 {
216 	ipv6_addr_set(addr,
217 		      __constant_htonl(0xFF020000), 0, 0,
218 		      __constant_htonl(0x2));
219 }
220 
221 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
222 {
223 	return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000);
224 }
225 
226 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
227 {
228 	return (addr->s6_addr32[0] == htonl(0xff020000) &&
229 		addr->s6_addr32[1] == 0 &&
230 		addr->s6_addr32[2] == 0 &&
231 		addr->s6_addr32[3] == htonl(0x00000001));
232 }
233 
234 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
235 {
236 	return (addr->s6_addr32[0] == htonl(0xff020000) &&
237 		addr->s6_addr32[1] == 0 &&
238 		addr->s6_addr32[2] == 0 &&
239 		addr->s6_addr32[3] == htonl(0x00000002));
240 }
241 
242 #ifdef CONFIG_PROC_FS
243 extern int if6_proc_init(void);
244 extern void if6_proc_exit(void);
245 #endif
246 
247 #endif
248 #endif
249