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[IPV6]: Use bitfields for hop_limit and mcast_hops.
[net-next-2.6.git] / include / net / addrconf.h
CommitLineData
1da177e4
LT		 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
c7dc89c0 20#include <linux/in.h>
6a800d45
PM		 21#include <linux/in6.h>
22
1da177e4
LT		 23struct 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
e69a4adc
AV		 39 __be32 valid;
40 __be32 prefered;
41 __be32 reserved2;
1da177e4
LT		 42
43 struct in6_addr prefix;
44};
45
46
47#ifdef __KERNEL__
48
1da177e4
LT		 49#include <linux/netdevice.h>
50#include <net/if_inet6.h>
e4553edd 51#include <net/ipv6.h>
1da177e4
LT		 52
53#define IN6_ADDR_HSIZE 16
54
55extern int addrconf_init(void);
56extern void addrconf_cleanup(void);
57
af284937
DL		 58extern int addrconf_add_ifaddr(struct net *net,
59 void __user *arg);
60extern int addrconf_del_ifaddr(struct net *net,
61 void __user *arg);
62extern int addrconf_set_dstaddr(struct net *net,
63 void __user *arg);
1da177e4 64
bfeade08
DL		 65extern int ipv6_chk_addr(struct net *net,
66 struct in6_addr *addr,
1da177e4
LT		 67 struct net_device *dev,
68 int strict);
bfeade08 69
59fbb3a6 70#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
389f6612
DL		 71extern int ipv6_chk_home_addr(struct net *net,
72 struct in6_addr *addr);
65d4ed92 73#endif
1cab3da6
DL		 74extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
75 struct in6_addr *addr,
76 struct net_device *dev,
77 int strict);
78
1da177e4
LT		 79extern int ipv6_dev_get_saddr(struct net_device *dev,
80 struct in6_addr *daddr,
81 struct in6_addr *saddr);
95c385b4
NH		 82extern int ipv6_get_lladdr(struct net_device *dev,
83 struct in6_addr *addr,
84 unsigned char banned_flags);
1da177e4
LT		 85extern int ipv6_rcv_saddr_equal(const struct sock *sk,
86 const struct sock *sk2);
87extern void addrconf_join_solict(struct net_device *dev,
88 struct in6_addr *addr);
89extern void addrconf_leave_solict(struct inet6_dev *idev,
90 struct in6_addr *addr);
91
2a8cc6c8
YH		 92/*
93 * IPv6 Address Label subsystem (addrlabel.c)
94 */
95extern int ipv6_addr_label_init(void);
96extern void ipv6_addr_label_rtnl_register(void);
97extern u32 ipv6_addr_label(const struct in6_addr *addr,
98 int type, int ifindex);
99
1da177e4
LT		 100/*
101 * multicast prototypes (mcast.c)
102 */
103extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
104 struct in6_addr *addr);
105extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
106 struct in6_addr *addr);
107extern void ipv6_sock_mc_close(struct sock *sk);
108extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
109 struct in6_addr *src_addr);
110
111extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr);
112extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
113extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr);
114extern void ipv6_mc_up(struct inet6_dev *idev);
115extern void ipv6_mc_down(struct inet6_dev *idev);
116extern void ipv6_mc_init_dev(struct inet6_dev *idev);
117extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
118extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
119
120extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
121 struct in6_addr *src_addr);
122extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
123
124extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
125
1da177e4
LT		 126/*
127 * anycast prototypes (anycast.c)
128 */
129extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
130extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
131extern void ipv6_sock_ac_close(struct sock *sk);
132extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
133
134extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
135extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
136extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr);
137
138
139/* Device notifier */
140extern int register_inet6addr_notifier(struct notifier_block *nb);
141extern int unregister_inet6addr_notifier(struct notifier_block *nb);
142
143static inline struct inet6_dev *
144__in6_dev_get(struct net_device *dev)
145{
8814c4b5 146 return rcu_dereference(dev->ip6_ptr);
1da177e4
LT		 147}
148
1da177e4
LT		 149static inline struct inet6_dev *
150in6_dev_get(struct net_device *dev)
151{
152 struct inet6_dev *idev = NULL;
8814c4b5
YH		 153 rcu_read_lock();
154 idev = __in6_dev_get(dev);
1da177e4
LT		 155 if (idev)
156 atomic_inc(&idev->refcnt);
8814c4b5 157 rcu_read_unlock();
1da177e4
LT		 158 return idev;
159}
160
161extern void in6_dev_finish_destroy(struct inet6_dev *idev);
162
163static inline void
164in6_dev_put(struct inet6_dev *idev)
165{
166 if (atomic_dec_and_test(&idev->refcnt))
167 in6_dev_finish_destroy(idev);
168}
169
170#define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt)
171#define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt)
172
173
174extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
175
176static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
177{
178 if (atomic_dec_and_test(&ifp->refcnt))
179 inet6_ifa_finish_destroy(ifp);
180}
181
182#define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt)
183#define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt)
184
185
186extern void addrconf_forwarding_on(void);
187/*
188 * Hash function taken from net_alias.c
189 */
190
191static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr)
192{
193 __u32 word;
194
195 /*
196 * We perform the hash function over the last 64 bits of the address
197 * This will include the IEEE address token on links that support it.
198 */
199
e69a4adc 200 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
1da177e4
LT		 201 word ^= (word >> 16);
202 word ^= (word >> 8);
203
204 return ((word ^ (word >> 4)) & 0x0f);
205}
206
207/*
208 * compute link-local solicited-node multicast address
209 */
210
211static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
212 struct in6_addr *solicited)
213{
214 ipv6_addr_set(solicited,
0e7b8dcd
YH		 215 htonl(0xFF020000), 0,
216 htonl(0x1),
217 htonl(0xFF000000) | addr->s6_addr32[3]);
1da177e4
LT		 218}
219
220
221static inline void ipv6_addr_all_nodes(struct in6_addr *addr)
222{
0e7b8dcd 223 ipv6_addr_set(addr, htonl(0xFF020000), 0, 0, htonl(0x1));
1da177e4
LT		 224}
225
226static inline void ipv6_addr_all_routers(struct in6_addr *addr)
227{
0e7b8dcd 228 ipv6_addr_set(addr, htonl(0xFF020000), 0, 0, htonl(0x2));
1da177e4
LT		 229}
230
231static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
232{
0e7b8dcd 233 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
1da177e4
LT		 234}
235
236static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
237{
238 return (addr->s6_addr32[0] == htonl(0xff020000) &&
239 addr->s6_addr32[1] == 0 &&
240 addr->s6_addr32[2] == 0 &&
241 addr->s6_addr32[3] == htonl(0x00000001));
242}
243
244static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
245{
246 return (addr->s6_addr32[0] == htonl(0xff020000) &&
247 addr->s6_addr32[1] == 0 &&
248 addr->s6_addr32[2] == 0 &&
249 addr->s6_addr32[3] == htonl(0x00000002));
250}
251
c7dc89c0
FT		 252static inline int ipv6_isatap_eui64(u8 *eui, __be32 addr)
253{
3db8cda3
JP		 254 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
255 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
256 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
257 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
258 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1e637c74 259 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
c7dc89c0
FT		 260 eui[1] = 0;
261 eui[2] = 0x5E;
262 eui[3] = 0xFE;
263 memcpy (eui+4, &addr, 4);
264 return 0;
265}
266
267static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
268{
269 return ((addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE));
270}
271
20380731
ACM		 272#ifdef CONFIG_PROC_FS
273extern int if6_proc_init(void);
274extern void if6_proc_exit(void);
275#endif
276
1da177e4
LT		 277#endif
278#endif
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