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15#ifndef _NET_IPV6_H
16#define _NET_IPV6_H
17
18#include <linux/ipv6.h>
19#include <linux/hardirq.h>
20#include <net/ndisc.h>
21#include <net/flow.h>
22#include <net/snmp.h>
23
24#define SIN6_LEN_RFC2133 24
25
26#define IPV6_MAXPLEN 65535
27
28
29
30
31
32#define NEXTHDR_HOP 0
33#define NEXTHDR_TCP 6
34#define NEXTHDR_UDP 17
35#define NEXTHDR_IPV6 41
36#define NEXTHDR_ROUTING 43
37#define NEXTHDR_FRAGMENT 44
38#define NEXTHDR_ESP 50
39#define NEXTHDR_AUTH 51
40#define NEXTHDR_ICMP 58
41#define NEXTHDR_NONE 59
42#define NEXTHDR_DEST 60
43
44#define NEXTHDR_MAX 255
45
46
47
48#define IPV6_DEFAULT_HOPLIMIT 64
49#define IPV6_DEFAULT_MCASTHOPS 1
50
51
52
53
54
55
56
57
58
59
60
61
62#define IPV6_ADDR_ANY 0x0000U
63
64#define IPV6_ADDR_UNICAST 0x0001U
65#define IPV6_ADDR_MULTICAST 0x0002U
66
67#define IPV6_ADDR_LOOPBACK 0x0010U
68#define IPV6_ADDR_LINKLOCAL 0x0020U
69#define IPV6_ADDR_SITELOCAL 0x0040U
70
71#define IPV6_ADDR_COMPATv4 0x0080U
72
73#define IPV6_ADDR_SCOPE_MASK 0x00f0U
74
75#define IPV6_ADDR_MAPPED 0x1000U
76#define IPV6_ADDR_RESERVED 0x2000U
77
78
79
80
81#ifdef __KERNEL__
82#define IPV6_ADDR_MC_SCOPE(a) \
83 ((a)->s6_addr[1] & 0x0f)
84#define __IPV6_ADDR_SCOPE_INVALID -1
85#endif
86#define IPV6_ADDR_SCOPE_NODELOCAL 0x01
87#define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
88#define IPV6_ADDR_SCOPE_SITELOCAL 0x05
89#define IPV6_ADDR_SCOPE_ORGLOCAL 0x08
90#define IPV6_ADDR_SCOPE_GLOBAL 0x0e
91
92
93
94
95
96struct frag_hdr {
97 unsigned char nexthdr;
98 unsigned char reserved;
99 unsigned short frag_off;
100 __u32 identification;
101};
102
103#define IP6_MF 0x0001
104
105#ifdef __KERNEL__
106
107#include <net/sock.h>
108
109
110extern int sysctl_ipv6_bindv6only;
111extern int sysctl_mld_max_msf;
112
113
114DECLARE_SNMP_STAT(struct ipstats_mib, ipv6_statistics);
115#define IP6_INC_STATS(field) SNMP_INC_STATS(ipv6_statistics, field)
116#define IP6_INC_STATS_BH(field) SNMP_INC_STATS_BH(ipv6_statistics, field)
117#define IP6_INC_STATS_USER(field) SNMP_INC_STATS_USER(ipv6_statistics, field)
118DECLARE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics);
119#define ICMP6_INC_STATS(idev, field) ({ \
120 struct inet6_dev *_idev = (idev); \
121 if (likely(_idev != NULL)) \
122 SNMP_INC_STATS(idev->stats.icmpv6, field); \
123 SNMP_INC_STATS(icmpv6_statistics, field); \
124})
125#define ICMP6_INC_STATS_BH(idev, field) ({ \
126 struct inet6_dev *_idev = (idev); \
127 if (likely(_idev != NULL)) \
128 SNMP_INC_STATS_BH((_idev)->stats.icmpv6, field); \
129 SNMP_INC_STATS_BH(icmpv6_statistics, field); \
130})
131#define ICMP6_INC_STATS_USER(idev, field) ({ \
132 struct inet6_dev *_idev = (idev); \
133 if (likely(_idev != NULL)) \
134 SNMP_INC_STATS_USER(_idev->stats.icmpv6, field); \
135 SNMP_INC_STATS_USER(icmpv6_statistics, field); \
136})
137#define ICMP6_INC_STATS_OFFSET_BH(idev, field, offset) ({ \
138 struct inet6_dev *_idev = idev; \
139 __typeof__(offset) _offset = (offset); \
140 if (likely(_idev != NULL)) \
141 SNMP_INC_STATS_OFFSET_BH(_idev->stats.icmpv6, field, _offset); \
142 SNMP_INC_STATS_OFFSET_BH(icmpv6_statistics, field, _offset); \
143})
144DECLARE_SNMP_STAT(struct udp_mib, udp_stats_in6);
145#define UDP6_INC_STATS(field) SNMP_INC_STATS(udp_stats_in6, field)
146#define UDP6_INC_STATS_BH(field) SNMP_INC_STATS_BH(udp_stats_in6, field)
147#define UDP6_INC_STATS_USER(field) SNMP_INC_STATS_USER(udp_stats_in6, field)
148extern atomic_t inet6_sock_nr;
149
150int snmp6_register_dev(struct inet6_dev *idev);
151int snmp6_unregister_dev(struct inet6_dev *idev);
152int snmp6_mib_init(void *ptr[2], size_t mibsize, size_t mibalign);
153void snmp6_mib_free(void *ptr[2]);
154
155struct ip6_ra_chain
156{
157 struct ip6_ra_chain *next;
158 struct sock *sk;
159 int sel;
160 void (*destructor)(struct sock *);
161};
162
163extern struct ip6_ra_chain *ip6_ra_chain;
164extern rwlock_t ip6_ra_lock;
165
166
167
168
169
170
171struct ipv6_txoptions
172{
173
174 int tot_len;
175
176
177
178 __u16 opt_flen;
179 __u16 opt_nflen;
180
181 struct ipv6_opt_hdr *hopopt;
182 struct ipv6_opt_hdr *dst0opt;
183 struct ipv6_rt_hdr *srcrt;
184 struct ipv6_opt_hdr *auth;
185 struct ipv6_opt_hdr *dst1opt;
186
187
188};
189
190struct ip6_flowlabel
191{
192 struct ip6_flowlabel *next;
193 u32 label;
194 struct in6_addr dst;
195 struct ipv6_txoptions *opt;
196 atomic_t users;
197 unsigned long linger;
198 u8 share;
199 u32 owner;
200 unsigned long lastuse;
201 unsigned long expires;
202};
203
204#define IPV6_FLOWINFO_MASK __constant_htonl(0x0FFFFFFF)
205#define IPV6_FLOWLABEL_MASK __constant_htonl(0x000FFFFF)
206
207struct ipv6_fl_socklist
208{
209 struct ipv6_fl_socklist *next;
210 struct ip6_flowlabel *fl;
211};
212
213extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, u32 label);
214extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
215 struct ip6_flowlabel * fl,
216 struct ipv6_txoptions * fopt);
217extern void fl6_free_socklist(struct sock *sk);
218extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
219extern void ip6_flowlabel_init(void);
220extern void ip6_flowlabel_cleanup(void);
221
222static inline void fl6_sock_release(struct ip6_flowlabel *fl)
223{
224 if (fl)
225 atomic_dec(&fl->users);
226}
227
228extern int ip6_ra_control(struct sock *sk, int sel,
229 void (*destructor)(struct sock *));
230
231
232extern int ip6_call_ra_chain(struct sk_buff *skb, int sel);
233
234extern int ipv6_parse_hopopts(struct sk_buff *skb, int);
235
236extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
237
238extern int ip6_frag_nqueues;
239extern atomic_t ip6_frag_mem;
240
241#define IPV6_FRAG_TIMEOUT (60*HZ)
242
243
244
245
246
247typedef int (*inet_getfrag_t) (const void *data,
248 struct in6_addr *addr,
249 char *,
250 unsigned int, unsigned int);
251
252
253extern int ipv6_addr_type(const struct in6_addr *addr);
254
255static inline int ipv6_addr_scope(const struct in6_addr *addr)
256{
257 return ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
258}
259
260static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
261{
262 return memcmp((const void *) a1, (const void *) a2, sizeof(struct in6_addr));
263}
264
265static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
266{
267 memcpy((void *) a1, (const void *) a2, sizeof(struct in6_addr));
268}
269
270static inline void ipv6_addr_prefix(struct in6_addr *pfx,
271 const struct in6_addr *addr,
272 int plen)
273{
274
275 int o = plen >> 3,
276 b = plen & 0x7;
277
278 memcpy(pfx->s6_addr, addr, o);
279 if (b != 0) {
280 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
281 o++;
282 }
283 if (o < 16)
284 memset(pfx->s6_addr + o, 0, 16 - o);
285}
286
287#ifndef __HAVE_ARCH_ADDR_SET
288static inline void ipv6_addr_set(struct in6_addr *addr,
289 __u32 w1, __u32 w2,
290 __u32 w3, __u32 w4)
291{
292 addr->s6_addr32[0] = w1;
293 addr->s6_addr32[1] = w2;
294 addr->s6_addr32[2] = w3;
295 addr->s6_addr32[3] = w4;
296}
297#endif
298
299static inline int ipv6_addr_any(const struct in6_addr *a)
300{
301 return ((a->s6_addr32[0] | a->s6_addr32[1] |
302 a->s6_addr32[2] | a->s6_addr32[3] ) == 0);
303}
304
305
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308
309
310
311
312
313extern int ipv6_rcv(struct sk_buff *skb,
314 struct net_device *dev,
315 struct packet_type *pt);
316
317
318
319
320extern int ip6_xmit(struct sock *sk,
321 struct sk_buff *skb,
322 struct flowi *fl,
323 struct ipv6_txoptions *opt,
324 int ipfragok);
325
326extern int ip6_nd_hdr(struct sock *sk,
327 struct sk_buff *skb,
328 struct net_device *dev,
329 struct in6_addr *saddr,
330 struct in6_addr *daddr,
331 int proto, int len);
332
333extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
334
335extern int ip6_append_data(struct sock *sk,
336 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
337 void *from,
338 int length,
339 int transhdrlen,
340 int hlimit,
341 struct ipv6_txoptions *opt,
342 struct flowi *fl,
343 struct rt6_info *rt,
344 unsigned int flags);
345
346extern int ip6_push_pending_frames(struct sock *sk);
347
348extern void ip6_flush_pending_frames(struct sock *sk);
349
350extern int ip6_dst_lookup(struct sock *sk,
351 struct dst_entry **dst,
352 struct flowi *fl);
353
354
355
356
357
358extern int ip6_output(struct sk_buff **pskb);
359extern int ip6_forward(struct sk_buff *skb);
360extern int ip6_input(struct sk_buff *skb);
361extern int ip6_mc_input(struct sk_buff *skb);
362
363
364
365
366
367extern u8 * ipv6_build_nfrag_opts(struct sk_buff *skb,
368 u8 *prev_hdr,
369 struct ipv6_txoptions *opt,
370 struct in6_addr *daddr,
371 u32 jumbolen);
372extern u8 * ipv6_build_frag_opts(struct sk_buff *skb,
373 u8 *prev_hdr,
374 struct ipv6_txoptions *opt);
375extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
376 struct ipv6_txoptions *opt,
377 u8 *proto,
378 struct in6_addr **daddr_p);
379extern void ipv6_push_frag_opts(struct sk_buff *skb,
380 struct ipv6_txoptions *opt,
381 u8 *proto);
382
383extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
384 u8 *nexthdrp, int len);
385
386extern int ipv6_ext_hdr(u8 nexthdr);
387
388extern struct ipv6_txoptions * ipv6_invert_rthdr(struct sock *sk,
389 struct ipv6_rt_hdr *hdr);
390
391
392
393
394
395
396extern int ipv6_setsockopt(struct sock *sk, int level,
397 int optname,
398 char __user *optval,
399 int optlen);
400extern int ipv6_getsockopt(struct sock *sk, int level,
401 int optname,
402 char __user *optval,
403 int __user *optlen);
404
405extern void ipv6_packet_init(void);
406
407extern void ipv6_packet_cleanup(void);
408
409extern int ip6_datagram_connect(struct sock *sk,
410 struct sockaddr *addr, int addr_len);
411
412extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
413extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, u16 port,
414 u32 info, u8 *payload);
415extern void ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
416
417extern int inet6_release(struct socket *sock);
418extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
419 int addr_len);
420extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
421 int *uaddr_len, int peer);
422extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
423 unsigned long arg);
424
425
426
427
428extern int sysctl_ip6frag_high_thresh;
429extern int sysctl_ip6frag_low_thresh;
430extern int sysctl_ip6frag_time;
431extern int sysctl_ip6frag_secret_interval;
432
433#endif
434#endif
435
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437
438
