xref: /openbmc/linux/include/net/addrconf.h (revision 22246614)
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/in.h>
21 #include <linux/in6.h>
22 
23 struct prefix_info {
24 	__u8			type;
25 	__u8			length;
26 	__u8			prefix_len;
27 
28 #if defined(__BIG_ENDIAN_BITFIELD)
29 	__u8			onlink : 1,
30 			 	autoconf : 1,
31 				reserved : 6;
32 #elif defined(__LITTLE_ENDIAN_BITFIELD)
33 	__u8			reserved : 6,
34 				autoconf : 1,
35 				onlink : 1;
36 #else
37 #error "Please fix <asm/byteorder.h>"
38 #endif
39 	__be32			valid;
40 	__be32			prefered;
41 	__be32			reserved2;
42 
43 	struct in6_addr		prefix;
44 };
45 
46 
47 #ifdef __KERNEL__
48 
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(struct net *net,
59 						    void __user *arg);
60 extern int			addrconf_del_ifaddr(struct net *net,
61 						    void __user *arg);
62 extern int			addrconf_set_dstaddr(struct net *net,
63 						     void __user *arg);
64 
65 extern int			ipv6_chk_addr(struct net *net,
66 					      struct in6_addr *addr,
67 					      struct net_device *dev,
68 					      int strict);
69 
70 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
71 extern int			ipv6_chk_home_addr(struct net *net,
72 						   struct in6_addr *addr);
73 #endif
74 
75 extern int			ipv6_chk_prefix(struct in6_addr *addr,
76 						struct net_device *dev);
77 
78 extern struct inet6_ifaddr      *ipv6_get_ifaddr(struct net *net,
79 						 const struct in6_addr *addr,
80 						 struct net_device *dev,
81 						 int strict);
82 
83 extern int			ipv6_dev_get_saddr(struct net_device *dev,
84 					       const struct in6_addr *daddr,
85 					       unsigned int srcprefs,
86 					       struct in6_addr *saddr);
87 extern int			ipv6_get_lladdr(struct net_device *dev,
88 						struct in6_addr *addr,
89 						unsigned char banned_flags);
90 extern int			ipv6_rcv_saddr_equal(const struct sock *sk,
91 						      const struct sock *sk2);
92 extern void			addrconf_join_solict(struct net_device *dev,
93 					struct in6_addr *addr);
94 extern void			addrconf_leave_solict(struct inet6_dev *idev,
95 					struct in6_addr *addr);
96 
97 /*
98  *	IPv6 Address Label subsystem (addrlabel.c)
99  */
100 extern int			ipv6_addr_label_init(void);
101 extern void			ipv6_addr_label_rtnl_register(void);
102 extern u32			ipv6_addr_label(const struct in6_addr *addr,
103 						int type, int ifindex);
104 
105 /*
106  *	multicast prototypes (mcast.c)
107  */
108 extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
109 			     const struct in6_addr *addr);
110 extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
111 			     const struct in6_addr *addr);
112 extern void ipv6_sock_mc_close(struct sock *sk);
113 extern int inet6_mc_check(struct sock *sk,
114 			  const struct in6_addr *mc_addr,
115 			  const struct in6_addr *src_addr);
116 
117 extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
118 extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
119 extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
120 extern void ipv6_mc_up(struct inet6_dev *idev);
121 extern void ipv6_mc_down(struct inet6_dev *idev);
122 extern void ipv6_mc_init_dev(struct inet6_dev *idev);
123 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
124 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
125 
126 extern int ipv6_chk_mcast_addr(struct net_device *dev,
127 			       const struct in6_addr *group,
128 			       const struct in6_addr *src_addr);
129 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
130 
131 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
132 
133 /*
134  *	anycast prototypes (anycast.c)
135  */
136 extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
137 extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
138 extern void ipv6_sock_ac_close(struct sock *sk);
139 extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
140 
141 extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
142 extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
143 extern int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
144 			       struct in6_addr *addr);
145 
146 
147 /* Device notifier */
148 extern int register_inet6addr_notifier(struct notifier_block *nb);
149 extern int unregister_inet6addr_notifier(struct notifier_block *nb);
150 
151 static inline struct inet6_dev *
152 __in6_dev_get(struct net_device *dev)
153 {
154 	return rcu_dereference(dev->ip6_ptr);
155 }
156 
157 static inline struct inet6_dev *
158 in6_dev_get(struct net_device *dev)
159 {
160 	struct inet6_dev *idev = NULL;
161 	rcu_read_lock();
162 	idev = __in6_dev_get(dev);
163 	if (idev)
164 		atomic_inc(&idev->refcnt);
165 	rcu_read_unlock();
166 	return idev;
167 }
168 
169 extern void in6_dev_finish_destroy(struct inet6_dev *idev);
170 
171 static inline void
172 in6_dev_put(struct inet6_dev *idev)
173 {
174 	if (atomic_dec_and_test(&idev->refcnt))
175 		in6_dev_finish_destroy(idev);
176 }
177 
178 #define __in6_dev_put(idev)  atomic_dec(&(idev)->refcnt)
179 #define in6_dev_hold(idev)   atomic_inc(&(idev)->refcnt)
180 
181 
182 extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
183 
184 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
185 {
186 	if (atomic_dec_and_test(&ifp->refcnt))
187 		inet6_ifa_finish_destroy(ifp);
188 }
189 
190 #define __in6_ifa_put(ifp)	atomic_dec(&(ifp)->refcnt)
191 #define in6_ifa_hold(ifp)	atomic_inc(&(ifp)->refcnt)
192 
193 
194 
195 /*
196  *	compute link-local solicited-node multicast address
197  */
198 
199 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
200 					     struct in6_addr *solicited)
201 {
202 	ipv6_addr_set(solicited,
203 		      htonl(0xFF020000), 0,
204 		      htonl(0x1),
205 		      htonl(0xFF000000) | addr->s6_addr32[3]);
206 }
207 
208 static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
209 {
210 	return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
211 }
212 
213 static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
214 {
215 	return (((addr->s6_addr32[0] ^ htonl(0xff020000)) |
216 		addr->s6_addr32[1] | addr->s6_addr32[2] |
217 		(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0);
218 }
219 
220 static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
221 {
222 	return (((addr->s6_addr32[0] ^ htonl(0xff020000)) |
223 		addr->s6_addr32[1] | addr->s6_addr32[2] |
224 		(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0);
225 }
226 
227 extern int __ipv6_isatap_ifid(u8 *eui, __be32 addr);
228 
229 static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
230 {
231 	return ((addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE));
232 }
233 
234 #ifdef CONFIG_PROC_FS
235 extern int if6_proc_init(void);
236 extern void if6_proc_exit(void);
237 #endif
238 
239 #endif
240 #endif
241