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13#ifndef _NET_IPV6_H
14#define _NET_IPV6_H
15
16#include <linux/ipv6.h>
17#include <linux/hardirq.h>
18#include <net/if_inet6.h>
19#include <net/ndisc.h>
20#include <net/flow.h>
21#include <net/snmp.h>
22
23#define SIN6_LEN_RFC2133 24
24
25#define IPV6_MAXPLEN 65535
26
27
28
29
30
31#define NEXTHDR_HOP 0
32#define NEXTHDR_TCP 6
33#define NEXTHDR_UDP 17
34#define NEXTHDR_IPV6 41
35#define NEXTHDR_ROUTING 43
36#define NEXTHDR_FRAGMENT 44
37#define NEXTHDR_ESP 50
38#define NEXTHDR_AUTH 51
39#define NEXTHDR_ICMP 58
40#define NEXTHDR_NONE 59
41#define NEXTHDR_DEST 60
42#define NEXTHDR_MOBILITY 135
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 __u8 nexthdr;
98 __u8 reserved;
99 __be16 frag_off;
100 __be32 identification;
101};
102
103#define IP6_MF 0x0001
104
105#ifdef __KERNEL__
106
107#include <net/sock.h>
108
109
110extern int sysctl_mld_max_msf;
111extern struct ctl_path net_ipv6_ctl_path[];
112
113#define _DEVINC(statname, modifier, idev, field) \
114({ \
115 struct inet6_dev *_idev = (idev); \
116 if (likely(_idev != NULL)) \
117 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
118 SNMP_INC_STATS##modifier(statname##_statistics, (field)); \
119})
120
121#define _DEVADD(statname, modifier, idev, field, val) \
122({ \
123 struct inet6_dev *_idev = (idev); \
124 if (likely(_idev != NULL)) \
125 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
126 SNMP_ADD_STATS##modifier(statname##_statistics, (field), (val));\
127})
128
129
130DECLARE_SNMP_STAT(struct ipstats_mib, ipv6_statistics);
131
132#define IP6_INC_STATS(idev,field) _DEVINC(ipv6, , idev, field)
133#define IP6_INC_STATS_BH(idev,field) _DEVINC(ipv6, _BH, idev, field)
134#define IP6_ADD_STATS_BH(idev,field,val) _DEVADD(ipv6, _BH, idev, field, val)
135
136DECLARE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics);
137DECLARE_SNMP_STAT(struct icmpv6msg_mib, icmpv6msg_statistics);
138
139#define ICMP6_INC_STATS(idev, field) _DEVINC(icmpv6, , idev, field)
140#define ICMP6_INC_STATS_BH(idev, field) _DEVINC(icmpv6, _BH, idev, field)
141
142#define ICMP6MSGOUT_INC_STATS(idev, field) \
143 _DEVINC(icmpv6msg, , idev, field +256)
144#define ICMP6MSGOUT_INC_STATS_BH(idev, field) \
145 _DEVINC(icmpv6msg, _BH, idev, field +256)
146#define ICMP6MSGIN_INC_STATS(idev, field) \
147 _DEVINC(icmpv6msg, , idev, field)
148#define ICMP6MSGIN_INC_STATS_BH(idev, field) \
149 _DEVINC(icmpv6msg, _BH, idev, field)
150
151struct ip6_ra_chain
152{
153 struct ip6_ra_chain *next;
154 struct sock *sk;
155 int sel;
156 void (*destructor)(struct sock *);
157};
158
159extern struct ip6_ra_chain *ip6_ra_chain;
160extern rwlock_t ip6_ra_lock;
161
162
163
164
165
166
167struct ipv6_txoptions
168{
169
170 int tot_len;
171
172
173
174 __u16 opt_flen;
175 __u16 opt_nflen;
176
177 struct ipv6_opt_hdr *hopopt;
178 struct ipv6_opt_hdr *dst0opt;
179 struct ipv6_rt_hdr *srcrt;
180 struct ipv6_opt_hdr *dst1opt;
181
182
183};
184
185struct ip6_flowlabel
186{
187 struct ip6_flowlabel *next;
188 __be32 label;
189 atomic_t users;
190 struct in6_addr dst;
191 struct ipv6_txoptions *opt;
192 unsigned long linger;
193 u8 share;
194 u32 owner;
195 unsigned long lastuse;
196 unsigned long expires;
197 struct net *fl_net;
198};
199
200#define IPV6_FLOWINFO_MASK __constant_htonl(0x0FFFFFFF)
201#define IPV6_FLOWLABEL_MASK __constant_htonl(0x000FFFFF)
202
203struct ipv6_fl_socklist
204{
205 struct ipv6_fl_socklist *next;
206 struct ip6_flowlabel *fl;
207};
208
209extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
210extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
211 struct ip6_flowlabel * fl,
212 struct ipv6_txoptions * fopt);
213extern void fl6_free_socklist(struct sock *sk);
214extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
215extern int ip6_flowlabel_init(void);
216extern void ip6_flowlabel_cleanup(void);
217
218static inline void fl6_sock_release(struct ip6_flowlabel *fl)
219{
220 if (fl)
221 atomic_dec(&fl->users);
222}
223
224extern int ip6_ra_control(struct sock *sk, int sel);
225
226extern int ipv6_parse_hopopts(struct sk_buff *skb);
227
228extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
229extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
230 int newtype,
231 struct ipv6_opt_hdr __user *newopt,
232 int newoptlen);
233struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
234 struct ipv6_txoptions *opt);
235
236extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
237
238int ip6_frag_nqueues(struct net *net);
239int ip6_frag_mem(struct net *net);
240
241#define IPV6_FRAG_TIMEOUT (60*HZ)
242
243extern int __ipv6_addr_type(const struct in6_addr *addr);
244static inline int ipv6_addr_type(const struct in6_addr *addr)
245{
246 return __ipv6_addr_type(addr) & 0xffff;
247}
248
249static inline int ipv6_addr_scope(const struct in6_addr *addr)
250{
251 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
252}
253
254static inline int __ipv6_addr_src_scope(int type)
255{
256 return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
257}
258
259static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
260{
261 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
262}
263
264static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
265{
266 return memcmp(a1, a2, sizeof(struct in6_addr));
267}
268
269static inline int
270ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
271 const struct in6_addr *a2)
272{
273 return (!!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
274 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
275 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
276 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])));
277}
278
279static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
280{
281 memcpy(a1, a2, sizeof(struct in6_addr));
282}
283
284static inline void ipv6_addr_prefix(struct in6_addr *pfx,
285 const struct in6_addr *addr,
286 int plen)
287{
288
289 int o = plen >> 3,
290 b = plen & 0x7;
291
292 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
293 memcpy(pfx->s6_addr, addr, o);
294 if (b != 0)
295 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
296}
297
298static inline void ipv6_addr_set(struct in6_addr *addr,
299 __be32 w1, __be32 w2,
300 __be32 w3, __be32 w4)
301{
302 addr->s6_addr32[0] = w1;
303 addr->s6_addr32[1] = w2;
304 addr->s6_addr32[2] = w3;
305 addr->s6_addr32[3] = w4;
306}
307
308static inline int ipv6_addr_equal(const struct in6_addr *a1,
309 const struct in6_addr *a2)
310{
311 return (((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
312 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
313 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
314 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0);
315}
316
317static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
318 unsigned int prefixlen)
319{
320 unsigned pdw, pbi;
321
322
323 pdw = prefixlen >> 5;
324 if (pdw && memcmp(a1, a2, pdw << 2))
325 return 0;
326
327
328 pbi = prefixlen & 0x1f;
329 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
330 return 0;
331
332 return 1;
333}
334
335static inline int ipv6_prefix_equal(const struct in6_addr *a1,
336 const struct in6_addr *a2,
337 unsigned int prefixlen)
338{
339 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
340 prefixlen);
341}
342
343struct inet_frag_queue;
344
345struct ip6_create_arg {
346 __be32 id;
347 struct in6_addr *src;
348 struct in6_addr *dst;
349};
350
351void ip6_frag_init(struct inet_frag_queue *q, void *a);
352int ip6_frag_match(struct inet_frag_queue *q, void *a);
353
354static inline int ipv6_addr_any(const struct in6_addr *a)
355{
356 return ((a->s6_addr32[0] | a->s6_addr32[1] |
357 a->s6_addr32[2] | a->s6_addr32[3] ) == 0);
358}
359
360static inline int ipv6_addr_loopback(const struct in6_addr *a)
361{
362 return ((a->s6_addr32[0] | a->s6_addr32[1] |
363 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0);
364}
365
366static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
367{
368 return ((a->s6_addr32[0] | a->s6_addr32[1] |
369 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0);
370}
371
372
373
374
375
376static inline int ipv6_addr_orchid(const struct in6_addr *a)
377{
378 return ((a->s6_addr32[0] & htonl(0xfffffff0))
379 == htonl(0x20010010));
380}
381
382static inline void ipv6_addr_set_v4mapped(const __be32 addr,
383 struct in6_addr *v4mapped)
384{
385 ipv6_addr_set(v4mapped,
386 0, 0,
387 htonl(0x0000FFFF),
388 addr);
389}
390
391
392
393
394
395static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
396{
397 const __be32 *a1 = token1, *a2 = token2;
398 int i;
399
400 addrlen >>= 2;
401
402 for (i = 0; i < addrlen; i++) {
403 __be32 xb = a1[i] ^ a2[i];
404 if (xb)
405 return i * 32 + 32 - fls(ntohl(xb));
406 }
407
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421
422
423
424 return (addrlen << 5);
425}
426
427static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
428{
429 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
430}
431
432
433
434
435
436
437
438
439
440extern int ipv6_rcv(struct sk_buff *skb,
441 struct net_device *dev,
442 struct packet_type *pt,
443 struct net_device *orig_dev);
444
445extern int ip6_rcv_finish(struct sk_buff *skb);
446
447
448
449
450extern int ip6_xmit(struct sock *sk,
451 struct sk_buff *skb,
452 struct flowi *fl,
453 struct ipv6_txoptions *opt,
454 int ipfragok);
455
456extern int ip6_nd_hdr(struct sock *sk,
457 struct sk_buff *skb,
458 struct net_device *dev,
459 const struct in6_addr *saddr,
460 const struct in6_addr *daddr,
461 int proto, int len);
462
463extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
464
465extern int ip6_append_data(struct sock *sk,
466 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
467 void *from,
468 int length,
469 int transhdrlen,
470 int hlimit,
471 int tclass,
472 struct ipv6_txoptions *opt,
473 struct flowi *fl,
474 struct rt6_info *rt,
475 unsigned int flags);
476
477extern int ip6_push_pending_frames(struct sock *sk);
478
479extern void ip6_flush_pending_frames(struct sock *sk);
480
481extern int ip6_dst_lookup(struct sock *sk,
482 struct dst_entry **dst,
483 struct flowi *fl);
484extern int ip6_dst_blackhole(struct sock *sk,
485 struct dst_entry **dst,
486 struct flowi *fl);
487extern int ip6_sk_dst_lookup(struct sock *sk,
488 struct dst_entry **dst,
489 struct flowi *fl);
490
491
492
493
494
495extern int ip6_output(struct sk_buff *skb);
496extern int ip6_forward(struct sk_buff *skb);
497extern int ip6_input(struct sk_buff *skb);
498extern int ip6_mc_input(struct sk_buff *skb);
499
500extern int __ip6_local_out(struct sk_buff *skb);
501extern int ip6_local_out(struct sk_buff *skb);
502
503
504
505
506
507extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
508 struct ipv6_txoptions *opt,
509 u8 *proto,
510 struct in6_addr **daddr_p);
511extern void ipv6_push_frag_opts(struct sk_buff *skb,
512 struct ipv6_txoptions *opt,
513 u8 *proto);
514
515extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
516 u8 *nexthdrp);
517
518extern int ipv6_ext_hdr(u8 nexthdr);
519
520extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
521
522
523
524
525
526extern int ipv6_setsockopt(struct sock *sk, int level,
527 int optname,
528 char __user *optval,
529 int optlen);
530extern int ipv6_getsockopt(struct sock *sk, int level,
531 int optname,
532 char __user *optval,
533 int __user *optlen);
534extern int compat_ipv6_setsockopt(struct sock *sk,
535 int level,
536 int optname,
537 char __user *optval,
538 int optlen);
539extern int compat_ipv6_getsockopt(struct sock *sk,
540 int level,
541 int optname,
542 char __user *optval,
543 int __user *optlen);
544
545extern int ip6_datagram_connect(struct sock *sk,
546 struct sockaddr *addr, int addr_len);
547
548extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
549extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
550 u32 info, u8 *payload);
551extern void ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
552
553extern int inet6_release(struct socket *sock);
554extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
555 int addr_len);
556extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
557 int *uaddr_len, int peer);
558extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
559 unsigned long arg);
560
561extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
562 struct sock *sk);
563
564
565
566
567extern const struct proto_ops inet6_stream_ops;
568extern const struct proto_ops inet6_dgram_ops;
569
570struct group_source_req;
571struct group_filter;
572
573extern int ip6_mc_source(int add, int omode, struct sock *sk,
574 struct group_source_req *pgsr);
575extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
576extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
577 struct group_filter __user *optval,
578 int __user *optlen);
579
580#ifdef CONFIG_PROC_FS
581extern int ac6_proc_init(struct net *net);
582extern void ac6_proc_exit(struct net *net);
583extern int raw6_proc_init(void);
584extern void raw6_proc_exit(void);
585extern int tcp6_proc_init(struct net *net);
586extern void tcp6_proc_exit(struct net *net);
587extern int udp6_proc_init(struct net *net);
588extern void udp6_proc_exit(struct net *net);
589extern int udplite6_proc_init(void);
590extern void udplite6_proc_exit(void);
591extern int ipv6_misc_proc_init(void);
592extern void ipv6_misc_proc_exit(void);
593extern int snmp6_register_dev(struct inet6_dev *idev);
594extern int snmp6_unregister_dev(struct inet6_dev *idev);
595
596#else
597static inline int ac6_proc_init(struct net *net) { return 0; }
598static inline void ac6_proc_exit(struct net *net) { }
599static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
600static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
601#endif
602
603#ifdef CONFIG_SYSCTL
604extern ctl_table ipv6_route_table_template[];
605extern ctl_table ipv6_icmp_table_template[];
606
607extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
608extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
609extern int ipv6_sysctl_register(void);
610extern void ipv6_sysctl_unregister(void);
611extern int ipv6_static_sysctl_register(void);
612extern void ipv6_static_sysctl_unregister(void);
613#endif
614
615#endif
616#endif
617
