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[NET]: Eliminate unused argument from sk_stream_alloc_pskb
[mirror_ubuntu-bionic-kernel.git] / include / net / addrconf.h
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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
6a800d45
PM		 20#include <linux/in6.h>
21
1da177e4
LT		 22struct 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
e69a4adc
AV		 38 __be32 valid;
39 __be32 prefered;
40 __be32 reserved2;
1da177e4
LT		 41
42 struct in6_addr prefix;
43};
44
45
46#ifdef __KERNEL__
47
1da177e4
LT		 48#include <linux/netdevice.h>
49#include <net/if_inet6.h>
e4553edd 50#include <net/ipv6.h>
1da177e4
LT		 51
52#define IN6_ADDR_HSIZE 16
53
54extern int addrconf_init(void);
55extern void addrconf_cleanup(void);
56
57extern int addrconf_add_ifaddr(void __user *arg);
58extern int addrconf_del_ifaddr(void __user *arg);
59extern int addrconf_set_dstaddr(void __user *arg);
60
61extern int ipv6_chk_addr(struct in6_addr *addr,
62 struct net_device *dev,
63 int strict);
59fbb3a6 64#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3b9f9a1c 65extern int ipv6_chk_home_addr(struct in6_addr *addr);
65d4ed92 66#endif
1da177e4
LT		 67extern struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr,
68 struct net_device *dev,
69 int strict);
70extern int ipv6_get_saddr(struct dst_entry *dst,
71 struct in6_addr *daddr,
72 struct in6_addr *saddr);
73extern int ipv6_dev_get_saddr(struct net_device *dev,
74 struct in6_addr *daddr,
75 struct in6_addr *saddr);
95c385b4
NH		 76extern int ipv6_get_lladdr(struct net_device *dev,
77 struct in6_addr *addr,
78 unsigned char banned_flags);
1da177e4
LT		 79extern int ipv6_rcv_saddr_equal(const struct sock *sk,
80 const struct sock *sk2);
81extern void addrconf_join_solict(struct net_device *dev,
82 struct in6_addr *addr);
83extern void addrconf_leave_solict(struct inet6_dev *idev,
84 struct in6_addr *addr);
85
2a8cc6c8
YH		 86/*
87 * IPv6 Address Label subsystem (addrlabel.c)
88 */
89extern int ipv6_addr_label_init(void);
90extern void ipv6_addr_label_rtnl_register(void);
91extern u32 ipv6_addr_label(const struct in6_addr *addr,
92 int type, int ifindex);
93
1da177e4
LT		 94/*
95 * multicast prototypes (mcast.c)
96 */
97extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
98 struct in6_addr *addr);
99extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
100 struct in6_addr *addr);
101extern void ipv6_sock_mc_close(struct sock *sk);
102extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
103 struct in6_addr *src_addr);
104
105extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr);
106extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
107extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr);
108extern void ipv6_mc_up(struct inet6_dev *idev);
109extern void ipv6_mc_down(struct inet6_dev *idev);
110extern void ipv6_mc_init_dev(struct inet6_dev *idev);
111extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
112extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
113
114extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
115 struct in6_addr *src_addr);
116extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
117
118extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
119
120extern int ipv6_get_hoplimit(struct net_device *dev);
121
122/*
123 * anycast prototypes (anycast.c)
124 */
125extern int ipv6_sock_ac_join(struct sock *sk,int ifindex,struct in6_addr *addr);
126extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex,struct in6_addr *addr);
127extern void ipv6_sock_ac_close(struct sock *sk);
128extern int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex);
129
130extern int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr);
131extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr);
132extern int ipv6_chk_acast_addr(struct net_device *dev, struct in6_addr *addr);
133
134
135/* Device notifier */
136extern int register_inet6addr_notifier(struct notifier_block *nb);
137extern int unregister_inet6addr_notifier(struct notifier_block *nb);
138
139static inline struct inet6_dev *
140__in6_dev_get(struct net_device *dev)
141{
8814c4b5 142 return rcu_dereference(dev->ip6_ptr);
1da177e4
LT		 143}
144
1da177e4
LT		 145static inline struct inet6_dev *
146in6_dev_get(struct net_device *dev)
147{
148 struct inet6_dev *idev = NULL;
8814c4b5
YH		 149 rcu_read_lock();
150 idev = __in6_dev_get(dev);
1da177e4
LT		 151 if (idev)
152 atomic_inc(&idev->refcnt);
8814c4b5 153 rcu_read_unlock();
1da177e4
LT		 154 return idev;
155}
156
157extern void in6_dev_finish_destroy(struct inet6_dev *idev);
158
159static inline void
160in6_dev_put(struct inet6_dev *idev)
161{
162 if (atomic_dec_and_test(&idev->refcnt))
163 in6_dev_finish_destroy(idev);
164}
165
166#define __in6_dev_put(idev) atomic_dec(&(idev)->refcnt)
167#define in6_dev_hold(idev) atomic_inc(&(idev)->refcnt)
168
169
170extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
171
172static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
173{
174 if (atomic_dec_and_test(&ifp->refcnt))
175 inet6_ifa_finish_destroy(ifp);
176}
177
178#define __in6_ifa_put(ifp) atomic_dec(&(ifp)->refcnt)
179#define in6_ifa_hold(ifp) atomic_inc(&(ifp)->refcnt)
180
181
182extern void addrconf_forwarding_on(void);
183/*
184 * Hash function taken from net_alias.c
185 */
186
187static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr)
188{
189 __u32 word;
190
191 /*
192 * We perform the hash function over the last 64 bits of the address
193 * This will include the IEEE address token on links that support it.
194 */
195
e69a4adc 196 word = (__force u32)(addr->s6_addr32[2] ^ addr->s6_addr32[3]);
1da177e4
LT		 197 word ^= (word >> 16);
198 word ^= (word >> 8);
199
200 return ((word ^ (word >> 4)) & 0x0f);
201}
202
203/*
204 * compute link-local solicited-node multicast address
205 */
206
207static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
208 struct in6_addr *solicited)
209{
210 ipv6_addr_set(solicited,
211 __constant_htonl(0xFF020000), 0,
212 __constant_htonl(0x1),
213 __constant_htonl(0xFF000000) | addr->s6_addr32[3]);
214}
215
216
217static inline void ipv6_addr_all_nodes(struct in6_addr *addr)
218{
219 ipv6_addr_set(addr,
220 __constant_htonl(0xFF020000), 0, 0,
221 __constant_htonl(0x1));
222}
223
224static inline void ipv6_addr_all_routers(struct in6_addr *addr)
225{
226 ipv6_addr_set(addr,
227 __constant_htonl(0xFF020000), 0, 0,
228 __constant_htonl(0x2));
229}
230
231static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
232{
233 return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000);
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
20380731
ACM		 252#ifdef CONFIG_PROC_FS
253extern int if6_proc_init(void);
254extern void if6_proc_exit(void);
255#endif
256
1da177e4
LT		 257#endif
258#endif
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