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 const 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 inet6_dev *idev,
90 struct in6_addr *addr,
91 unsigned char banned_flags);
92extern int ipv6_get_lladdr(struct net_device *dev,
93 struct in6_addr *addr,
94 unsigned char banned_flags);
95extern int ipv6_rcv_saddr_equal(const struct sock *sk,
96 const struct sock *sk2);
97extern void addrconf_join_solict(struct net_device *dev,
98 const struct in6_addr *addr);
99extern void addrconf_leave_solict(struct inet6_dev *idev,
100 const struct in6_addr *addr);
101
102static inline unsigned long addrconf_timeout_fixup(u32 timeout,
103 unsigned int unit)
104{
105 if (timeout == 0xffffffff)
106 return ~0UL;
107
108 /*
109 * Avoid arithmetic overflow.
110 * Assuming unit is constant and non-zero, this "if" statement
111 * will go away on 64bit archs.
112 */
113 if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
114 return LONG_MAX / unit;
115
116 return timeout;
117}
118
119static inline int addrconf_finite_timeout(unsigned long timeout)
120{
121 return ~timeout;
122}
123
124/*
125 * IPv6 Address Label subsystem (addrlabel.c)
126 */
127extern int ipv6_addr_label_init(void);
128extern void ipv6_addr_label_cleanup(void);
129extern void ipv6_addr_label_rtnl_register(void);
130extern u32 ipv6_addr_label(struct net *net,
131 const struct in6_addr *addr,
132 int type, int ifindex);
133
134/*
135 * multicast prototypes (mcast.c)
136 */
137extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
138 const struct in6_addr *addr);
139extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
140 const struct in6_addr *addr);
141extern void ipv6_sock_mc_close(struct sock *sk);
142extern bool inet6_mc_check(struct sock *sk,
143 const struct in6_addr *mc_addr,
144 const struct in6_addr *src_addr);
145
146extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
147extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
148extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
149extern void ipv6_mc_up(struct inet6_dev *idev);
150extern void ipv6_mc_down(struct inet6_dev *idev);
151extern void ipv6_mc_unmap(struct inet6_dev *idev);
152extern void ipv6_mc_remap(struct inet6_dev *idev);
153extern void ipv6_mc_init_dev(struct inet6_dev *idev);
154extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
155extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
156
157extern bool ipv6_chk_mcast_addr(struct net_device *dev,
158 const struct in6_addr *group,
159 const struct in6_addr *src_addr);
160
161extern void ipv6_mc_dad_complete(struct inet6_dev *idev);
162/*
163 * identify MLD packets for MLD filter exceptions
164 */
165static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
166{
167 struct icmp6hdr *hdr;
168
169 if (nexthdr != IPPROTO_ICMPV6 ||
170 !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
171 return false;
172
173 hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
174
175 switch (hdr->icmp6_type) {
176 case ICMPV6_MGM_QUERY:
177 case ICMPV6_MGM_REPORT:
178 case ICMPV6_MGM_REDUCTION:
179 case ICMPV6_MLD2_REPORT:
180 return true;
181 default:
182 break;
183 }
184 return false;
185}
186
187extern void addrconf_prefix_rcv(struct net_device *dev,
188 u8 *opt, int len, bool sllao);
189
190/*
191 * anycast prototypes (anycast.c)
192 */
193extern int ipv6_sock_ac_join(struct sock *sk,int ifindex, const struct in6_addr *addr);
194extern int ipv6_sock_ac_drop(struct sock *sk,int ifindex, const struct in6_addr *addr);
195extern void ipv6_sock_ac_close(struct sock *sk);
196
197extern int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr);
198extern int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
199extern bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
200 const struct in6_addr *addr);
201
202
203/* Device notifier */
204extern int register_inet6addr_notifier(struct notifier_block *nb);
205extern int unregister_inet6addr_notifier(struct notifier_block *nb);
206extern int inet6addr_notifier_call_chain(unsigned long val, void *v);
207
208extern void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
209 struct ipv6_devconf *devconf);
210
211/**
212 * __in6_dev_get - get inet6_dev pointer from netdevice
213 * @dev: network device
214 *
215 * Caller must hold rcu_read_lock or RTNL, because this function
216 * does not take a reference on the inet6_dev.
217 */
218static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
219{
220 return rcu_dereference_rtnl(dev->ip6_ptr);
221}
222
223/**
224 * in6_dev_get - get inet6_dev pointer from netdevice
225 * @dev: network device
226 *
227 * This version can be used in any context, and takes a reference
228 * on the inet6_dev. Callers must use in6_dev_put() later to
229 * release this reference.
230 */
231static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
232{
233 struct inet6_dev *idev;
234
235 rcu_read_lock();
236 idev = rcu_dereference(dev->ip6_ptr);
237 if (idev)
238 atomic_inc(&idev->refcnt);
239 rcu_read_unlock();
240 return idev;
241}
242
243extern void in6_dev_finish_destroy(struct inet6_dev *idev);
244
245static inline void in6_dev_put(struct inet6_dev *idev)
246{
247 if (atomic_dec_and_test(&idev->refcnt))
248 in6_dev_finish_destroy(idev);
249}
250
251static inline void __in6_dev_put(struct inet6_dev *idev)
252{
253 atomic_dec(&idev->refcnt);
254}
255
256static inline void in6_dev_hold(struct inet6_dev *idev)
257{
258 atomic_inc(&idev->refcnt);
259}
260
261extern void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
262
263static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
264{
265 if (atomic_dec_and_test(&ifp->refcnt))
266 inet6_ifa_finish_destroy(ifp);
267}
268
269static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
270{
271 atomic_dec(&ifp->refcnt);
272}
273
274static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
275{
276 atomic_inc(&ifp->refcnt);
277}
278
279
280/*
281 * compute link-local solicited-node multicast address
282 */
283
284static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
285 struct in6_addr *solicited)
286{
287 ipv6_addr_set(solicited,
288 htonl(0xFF020000), 0,
289 htonl(0x1),
290 htonl(0xFF000000) | addr->s6_addr32[3]);
291}
292
293static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
294{
295 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
296}
297
298static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
299{
300#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
301 __u64 *p = (__u64 *)addr;
302 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
303#else
304 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
305 addr->s6_addr32[1] | addr->s6_addr32[2] |
306 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
307#endif
308}
309
310static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
311{
312#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
313 __u64 *p = (__u64 *)addr;
314 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
315#else
316 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
317 addr->s6_addr32[1] | addr->s6_addr32[2] |
318 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
319#endif
320}
321
322static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
323{
324 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
325}
326
327static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
328{
329#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
330 __u64 *p = (__u64 *)addr;
331 return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
332 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
333 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
334#else
335 return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
336 addr->s6_addr32[1] |
337 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
338 (addr->s6_addr[12] ^ 0xff)) == 0;
339#endif
340}
341
342#ifdef CONFIG_PROC_FS
343extern int if6_proc_init(void);
344extern void if6_proc_exit(void);
345#endif
346
347#endif