Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
1#ifndef _ADDRCONF_H
2#define _ADDRCONF_H
3
4#define MAX_RTR_SOLICITATIONS 3
5#define RTR_SOLICITATION_INTERVAL (4*HZ)
6
7#define MIN_VALID_LIFETIME (2*3600) /* 2 hours */
8
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)
13
14#define ADDR_CHECK_FREQUENCY (120*HZ)
15
16#define IPV6_MAX_ADDRESSES 16
17
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)
21
22#include <linux/in.h>
23#include <linux/in6.h>
24
25struct prefix_info {
26 __u8 type;
27 __u8 length;
28 __u8 prefix_len;
29
30#if defined(__BIG_ENDIAN_BITFIELD)
31 __u8 onlink : 1,
32 autoconf : 1,
33 reserved : 6;
34#elif defined(__LITTLE_ENDIAN_BITFIELD)
35 __u8 reserved : 6,
36 autoconf : 1,
37 onlink : 1;
38#else
39#error "Please fix <asm/byteorder.h>"
40#endif
41 __be32 valid;
42 __be32 prefered;
43 __be32 reserved2;
44
45 struct in6_addr prefix;
46};
47
48
49#include <linux/netdevice.h>
50#include <net/if_inet6.h>
51#include <net/ipv6.h>
52
53#define IN6_ADDR_HSIZE_SHIFT 4
54#define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT)
55
56extern int addrconf_init(void);
57extern void addrconf_cleanup(void);
58
59extern int addrconf_add_ifaddr(struct net *net,
60 void __user *arg);
61extern int addrconf_del_ifaddr(struct net *net,
62 void __user *arg);
63extern int addrconf_set_dstaddr(struct net *net,
64 void __user *arg);
65
66extern int ipv6_chk_addr(struct net *net,
67 const struct in6_addr *addr,
68 struct net_device *dev,
69 int strict);
70
71#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
72extern int ipv6_chk_home_addr(struct net *net,
73 const struct in6_addr *addr);
74#endif
75
76extern int ipv6_chk_prefix(const struct in6_addr *addr,
77 struct net_device *dev);
78
79extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
80 const struct in6_addr *addr,
81 struct net_device *dev,
82 int strict);
83
84extern int ipv6_dev_get_saddr(struct net *net,
85 const struct net_device *dev,
86 const struct in6_addr *daddr,
87 unsigned int srcprefs,
88 struct in6_addr *saddr);
89extern int ipv6_get_lladdr(struct net_device *dev,
90 struct in6_addr *addr,
91 unsigned char banned_flags);
92extern int ipv6_rcv_saddr_equal(const struct sock *sk,
93 const struct sock *sk2);
94extern void addrconf_join_solict(struct net_device *dev,
95 const struct in6_addr *addr);
96extern void addrconf_leave_solict(struct inet6_dev *idev,
97 const struct in6_addr *addr);
98
99static inline unsigned long addrconf_timeout_fixup(u32 timeout,
100 unsigned int unit)
101{
102 if (timeout == 0xffffffff)
103 return ~0UL;
104
105 /*
106 * Avoid arithmetic overflow.
107 * Assuming unit is constant and non-zero, this "if" statement
108 * will go away on 64bit archs.
109 */
110 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
111 return LONG_MAX / unit;
112
113 return timeout;
114}
115
116static inline int addrconf_finite_timeout(unsigned long timeout)
117{
118 return ~timeout;
119}
120
121/*
122 * IPv6 Address Label subsystem (addrlabel.c)
123 */
124extern int ipv6_addr_label_init(void);
125extern void ipv6_addr_label_cleanup(void);
126extern void ipv6_addr_label_rtnl_register(void);
127extern u32 ipv6_addr_label(struct net *net,
128 const struct in6_addr *addr,
129 int type, int ifindex);
130
131/*
132 * multicast prototypes (mcast.c)
133 */
134extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
135 const struct in6_addr *addr);
136extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
137 const struct in6_addr *addr);
138extern void ipv6_sock_mc_close(struct sock *sk);
139extern bool inet6_mc_check(struct sock *sk,
140 const struct in6_addr *mc_addr,
141 const struct in6_addr *src_addr);
142
143extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
144extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
145extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
146extern void ipv6_mc_up(struct inet6_dev *idev);
147extern void ipv6_mc_down(struct inet6_dev *idev);
148extern void ipv6_mc_unmap(struct inet6_dev *idev);
149extern void ipv6_mc_remap(struct inet6_dev *idev);
150extern void ipv6_mc_init_dev(struct inet6_dev *idev);
151extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
152extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
153
154extern bool ipv6_chk_mcast_addr(struct net_device *dev,
155 const struct in6_addr *group,
156 const struct in6_addr *src_addr);
157
158/*
159 * identify MLD packets for MLD filter exceptions
160 */
161static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
162{
163 struct icmp6hdr *hdr;
164
165 if (nexthdr != IPPROTO_ICMPV6 ||
166 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
167 return false;
168
169 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
170
171 switch (hdr->icmp6_type) {
172 case ICMPV6_MGM_QUERY:
173 case ICMPV6_MGM_REPORT:
174 case ICMPV6_MGM_REDUCTION:
175 case ICMPV6_MLD2_REPORT:
176 return true;
177 default:
178 break;
179 }
180 return false;
181}
182
183extern void addrconf_prefix_rcv(struct net_device *dev,
184 u8 *opt, int len, bool sllao);
185
186/*
187 * anycast prototypes (anycast.c)
188 */
189extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr);
190extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr);
191extern void ipv6_sock_ac_close(struct sock *sk);
192
193extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
194extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
195extern bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
196 const struct in6_addr *addr);
197
198
199/* Device notifier */
200extern int register_inet6addr_notifier(struct notifier_block *nb);
201extern int unregister_inet6addr_notifier(struct notifier_block *nb);
202extern int inet6addr_notifier_call_chain(unsigned long val, void *v);
203
204extern void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
205 struct ipv6_devconf *devconf);
206
207/**
208 * __in6_dev_get - get inet6_dev pointer from netdevice
209 * @dev: network device
210 *
211 * Caller must hold rcu_read_lock or RTNL, because this function
212 * does not take a reference on the inet6_dev.
213 */
214static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
215{
216 return rcu_dereference_rtnl(dev->ip6_ptr);
217}
218
219/**
220 * in6_dev_get - get inet6_dev pointer from netdevice
221 * @dev: network device
222 *
223 * This version can be used in any context, and takes a reference
224 * on the inet6_dev. Callers must use in6_dev_put() later to
225 * release this reference.
226 */
227static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
228{
229 struct inet6_dev *idev;
230
231 rcu_read_lock();
232 idev = rcu_dereference(dev->ip6_ptr);
233 if (idev)
234 atomic_inc(&idev->refcnt);
235 rcu_read_unlock();
236 return idev;
237}
238
239extern void in6_dev_finish_destroy(struct inet6_dev *idev);
240
241static inline void in6_dev_put(struct inet6_dev *idev)
242{
243 if (atomic_dec_and_test(&idev->refcnt))
244 in6_dev_finish_destroy(idev);
245}
246
247static inline void __in6_dev_put(struct inet6_dev *idev)
248{
249 atomic_dec(&idev->refcnt);
250}
251
252static inline void in6_dev_hold(struct inet6_dev *idev)
253{
254 atomic_inc(&idev->refcnt);
255}
256
257extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
258
259static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
260{
261 if (atomic_dec_and_test(&ifp->refcnt))
262 inet6_ifa_finish_destroy(ifp);
263}
264
265static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
266{
267 atomic_dec(&ifp->refcnt);
268}
269
270static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
271{
272 atomic_inc(&ifp->refcnt);
273}
274
275
276/*
277 * compute link-local solicited-node multicast address
278 */
279
280static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
281 struct in6_addr *solicited)
282{
283 ipv6_addr_set(solicited,
284 htonl(0xFF020000), 0,
285 htonl(0x1),
286 htonl(0xFF000000) | addr->s6_addr32[3]);
287}
288
289static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
290{
291 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
292}
293
294static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
295{
296#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
297 __u64 *p = (__u64 *)addr;
298 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
299#else
300 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
301 addr->s6_addr32[1] | addr->s6_addr32[2] |
302 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
303#endif
304}
305
306static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
307{
308#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
309 __u64 *p = (__u64 *)addr;
310 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
311#else
312 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
313 addr->s6_addr32[1] | addr->s6_addr32[2] |
314 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
315#endif
316}
317
318static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
319{
320 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
321}
322
323static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
324{
325#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
326 __u64 *p = (__u64 *)addr;
327 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
328 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
329 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
330#else
331 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
332 addr->s6_addr32[1] |
333 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
334 (addr->s6_addr[12] ^ 0xff)) == 0;
335#endif
336}
337
338#ifdef CONFIG_PROC_FS
339extern int if6_proc_init(void);
340extern void if6_proc_exit(void);
341#endif
342
343#endif