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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(net, 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((net)->mib.statname##_statistics, (field));\
119})
120
121#define _DEVADD(net, 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((net)->mib.statname##_statistics, (field), (val));\
127})
128
129#define _DEVUPD(net, statname, modifier, idev, field, val) \
130({ \
131 struct inet6_dev *_idev = (idev); \
132 if (likely(_idev != NULL)) \
133 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
134 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
135})
136
137
138
139#define IP6_INC_STATS(net, idev,field) \
140 _DEVINC(net, ipv6, , idev, field)
141#define IP6_INC_STATS_BH(net, idev,field) \
142 _DEVINC(net, ipv6, _BH, idev, field)
143#define IP6_ADD_STATS(net, idev,field,val) \
144 _DEVADD(net, ipv6, , idev, field, val)
145#define IP6_ADD_STATS_BH(net, idev,field,val) \
146 _DEVADD(net, ipv6, _BH, idev, field, val)
147#define IP6_UPD_PO_STATS(net, idev,field,val) \
148 _DEVUPD(net, ipv6, , idev, field, val)
149#define IP6_UPD_PO_STATS_BH(net, idev,field,val) \
150 _DEVUPD(net, ipv6, _BH, idev, field, val)
151#define ICMP6_INC_STATS(net, idev, field) \
152 _DEVINC(net, icmpv6, , idev, field)
153#define ICMP6_INC_STATS_BH(net, idev, field) \
154 _DEVINC(net, icmpv6, _BH, idev, field)
155
156#define ICMP6MSGOUT_INC_STATS(net, idev, field) \
157 _DEVINC(net, icmpv6msg, , idev, field +256)
158#define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
159 _DEVINC(net, icmpv6msg, _BH, idev, field +256)
160#define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
161 _DEVINC(net, icmpv6msg, _BH, idev, field)
162
163struct ip6_ra_chain
164{
165 struct ip6_ra_chain *next;
166 struct sock *sk;
167 int sel;
168 void (*destructor)(struct sock *);
169};
170
171extern struct ip6_ra_chain *ip6_ra_chain;
172extern rwlock_t ip6_ra_lock;
173
174
175
176
177
178
179struct ipv6_txoptions
180{
181
182 int tot_len;
183
184
185
186 __u16 opt_flen;
187 __u16 opt_nflen;
188
189 struct ipv6_opt_hdr *hopopt;
190 struct ipv6_opt_hdr *dst0opt;
191 struct ipv6_rt_hdr *srcrt;
192 struct ipv6_opt_hdr *dst1opt;
193
194
195};
196
197struct ip6_flowlabel
198{
199 struct ip6_flowlabel *next;
200 __be32 label;
201 atomic_t users;
202 struct in6_addr dst;
203 struct ipv6_txoptions *opt;
204 unsigned long linger;
205 u8 share;
206 u32 owner;
207 unsigned long lastuse;
208 unsigned long expires;
209 struct net *fl_net;
210};
211
212#define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
213#define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
214
215struct ipv6_fl_socklist
216{
217 struct ipv6_fl_socklist *next;
218 struct ip6_flowlabel *fl;
219};
220
221extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
222extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
223 struct ip6_flowlabel * fl,
224 struct ipv6_txoptions * fopt);
225extern void fl6_free_socklist(struct sock *sk);
226extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
227extern int ip6_flowlabel_init(void);
228extern void ip6_flowlabel_cleanup(void);
229
230static inline void fl6_sock_release(struct ip6_flowlabel *fl)
231{
232 if (fl)
233 atomic_dec(&fl->users);
234}
235
236extern int ip6_ra_control(struct sock *sk, int sel);
237
238extern int ipv6_parse_hopopts(struct sk_buff *skb);
239
240extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
241extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
242 int newtype,
243 struct ipv6_opt_hdr __user *newopt,
244 int newoptlen);
245struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
246 struct ipv6_txoptions *opt);
247
248extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
249
250int ip6_frag_nqueues(struct net *net);
251int ip6_frag_mem(struct net *net);
252
253#define IPV6_FRAG_TIMEOUT (60*HZ)
254
255extern int __ipv6_addr_type(const struct in6_addr *addr);
256static inline int ipv6_addr_type(const struct in6_addr *addr)
257{
258 return __ipv6_addr_type(addr) & 0xffff;
259}
260
261static inline int ipv6_addr_scope(const struct in6_addr *addr)
262{
263 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
264}
265
266static inline int __ipv6_addr_src_scope(int type)
267{
268 return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
269}
270
271static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
272{
273 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
274}
275
276static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
277{
278 return memcmp(a1, a2, sizeof(struct in6_addr));
279}
280
281static inline int
282ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
283 const struct in6_addr *a2)
284{
285 return (!!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
286 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
287 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
288 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3])));
289}
290
291static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
292{
293 memcpy(a1, a2, sizeof(struct in6_addr));
294}
295
296static inline void ipv6_addr_prefix(struct in6_addr *pfx,
297 const struct in6_addr *addr,
298 int plen)
299{
300
301 int o = plen >> 3,
302 b = plen & 0x7;
303
304 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
305 memcpy(pfx->s6_addr, addr, o);
306 if (b != 0)
307 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
308}
309
310static inline void ipv6_addr_set(struct in6_addr *addr,
311 __be32 w1, __be32 w2,
312 __be32 w3, __be32 w4)
313{
314 addr->s6_addr32[0] = w1;
315 addr->s6_addr32[1] = w2;
316 addr->s6_addr32[2] = w3;
317 addr->s6_addr32[3] = w4;
318}
319
320static inline int ipv6_addr_equal(const struct in6_addr *a1,
321 const struct in6_addr *a2)
322{
323 return (((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
324 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
325 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
326 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0);
327}
328
329static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
330 unsigned int prefixlen)
331{
332 unsigned pdw, pbi;
333
334
335 pdw = prefixlen >> 5;
336 if (pdw && memcmp(a1, a2, pdw << 2))
337 return 0;
338
339
340 pbi = prefixlen & 0x1f;
341 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
342 return 0;
343
344 return 1;
345}
346
347static inline int ipv6_prefix_equal(const struct in6_addr *a1,
348 const struct in6_addr *a2,
349 unsigned int prefixlen)
350{
351 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
352 prefixlen);
353}
354
355struct inet_frag_queue;
356
357struct ip6_create_arg {
358 __be32 id;
359 struct in6_addr *src;
360 struct in6_addr *dst;
361};
362
363void ip6_frag_init(struct inet_frag_queue *q, void *a);
364int ip6_frag_match(struct inet_frag_queue *q, void *a);
365
366static inline int ipv6_addr_any(const struct in6_addr *a)
367{
368 return ((a->s6_addr32[0] | a->s6_addr32[1] |
369 a->s6_addr32[2] | a->s6_addr32[3] ) == 0);
370}
371
372static inline int ipv6_addr_loopback(const struct in6_addr *a)
373{
374 return ((a->s6_addr32[0] | a->s6_addr32[1] |
375 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0);
376}
377
378static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
379{
380 return ((a->s6_addr32[0] | a->s6_addr32[1] |
381 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0);
382}
383
384
385
386
387
388static inline int ipv6_addr_orchid(const struct in6_addr *a)
389{
390 return ((a->s6_addr32[0] & htonl(0xfffffff0))
391 == htonl(0x20010010));
392}
393
394static inline void ipv6_addr_set_v4mapped(const __be32 addr,
395 struct in6_addr *v4mapped)
396{
397 ipv6_addr_set(v4mapped,
398 0, 0,
399 htonl(0x0000FFFF),
400 addr);
401}
402
403
404
405
406
407static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
408{
409 const __be32 *a1 = token1, *a2 = token2;
410 int i;
411
412 addrlen >>= 2;
413
414 for (i = 0; i < addrlen; i++) {
415 __be32 xb = a1[i] ^ a2[i];
416 if (xb)
417 return i * 32 + 32 - fls(ntohl(xb));
418 }
419
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425
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431
432
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434
435
436 return (addrlen << 5);
437}
438
439static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
440{
441 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
442}
443
444static __inline__ void ipv6_select_ident(struct frag_hdr *fhdr)
445{
446 static u32 ipv6_fragmentation_id = 1;
447 static DEFINE_SPINLOCK(ip6_id_lock);
448
449 spin_lock_bh(&ip6_id_lock);
450 fhdr->identification = htonl(ipv6_fragmentation_id);
451 if (++ipv6_fragmentation_id == 0)
452 ipv6_fragmentation_id = 1;
453 spin_unlock_bh(&ip6_id_lock);
454}
455
456
457
458
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460
461
462
463
464extern int ipv6_rcv(struct sk_buff *skb,
465 struct net_device *dev,
466 struct packet_type *pt,
467 struct net_device *orig_dev);
468
469extern int ip6_rcv_finish(struct sk_buff *skb);
470
471
472
473
474extern int ip6_xmit(struct sock *sk,
475 struct sk_buff *skb,
476 struct flowi *fl,
477 struct ipv6_txoptions *opt,
478 int ipfragok);
479
480extern int ip6_nd_hdr(struct sock *sk,
481 struct sk_buff *skb,
482 struct net_device *dev,
483 const struct in6_addr *saddr,
484 const struct in6_addr *daddr,
485 int proto, int len);
486
487extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
488
489extern int ip6_append_data(struct sock *sk,
490 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
491 void *from,
492 int length,
493 int transhdrlen,
494 int hlimit,
495 int tclass,
496 struct ipv6_txoptions *opt,
497 struct flowi *fl,
498 struct rt6_info *rt,
499 unsigned int flags);
500
501extern int ip6_push_pending_frames(struct sock *sk);
502
503extern void ip6_flush_pending_frames(struct sock *sk);
504
505extern int ip6_dst_lookup(struct sock *sk,
506 struct dst_entry **dst,
507 struct flowi *fl);
508extern int ip6_dst_blackhole(struct sock *sk,
509 struct dst_entry **dst,
510 struct flowi *fl);
511extern int ip6_sk_dst_lookup(struct sock *sk,
512 struct dst_entry **dst,
513 struct flowi *fl);
514
515
516
517
518
519extern int ip6_output(struct sk_buff *skb);
520extern int ip6_forward(struct sk_buff *skb);
521extern int ip6_input(struct sk_buff *skb);
522extern int ip6_mc_input(struct sk_buff *skb);
523
524extern int __ip6_local_out(struct sk_buff *skb);
525extern int ip6_local_out(struct sk_buff *skb);
526
527
528
529
530
531extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
532 struct ipv6_txoptions *opt,
533 u8 *proto,
534 struct in6_addr **daddr_p);
535extern void ipv6_push_frag_opts(struct sk_buff *skb,
536 struct ipv6_txoptions *opt,
537 u8 *proto);
538
539extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
540 u8 *nexthdrp);
541
542extern int ipv6_ext_hdr(u8 nexthdr);
543
544extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
545
546
547
548
549
550extern int ipv6_setsockopt(struct sock *sk, int level,
551 int optname,
552 char __user *optval,
553 unsigned int optlen);
554extern int ipv6_getsockopt(struct sock *sk, int level,
555 int optname,
556 char __user *optval,
557 int __user *optlen);
558extern int compat_ipv6_setsockopt(struct sock *sk,
559 int level,
560 int optname,
561 char __user *optval,
562 unsigned int optlen);
563extern int compat_ipv6_getsockopt(struct sock *sk,
564 int level,
565 int optname,
566 char __user *optval,
567 int __user *optlen);
568
569extern int ip6_datagram_connect(struct sock *sk,
570 struct sockaddr *addr, int addr_len);
571
572extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
573extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
574 u32 info, u8 *payload);
575extern void ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
576
577extern int inet6_release(struct socket *sock);
578extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
579 int addr_len);
580extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
581 int *uaddr_len, int peer);
582extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
583 unsigned long arg);
584
585extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
586 struct sock *sk);
587
588
589
590
591extern const struct proto_ops inet6_stream_ops;
592extern const struct proto_ops inet6_dgram_ops;
593
594struct group_source_req;
595struct group_filter;
596
597extern int ip6_mc_source(int add, int omode, struct sock *sk,
598 struct group_source_req *pgsr);
599extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
600extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
601 struct group_filter __user *optval,
602 int __user *optlen);
603extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
604 const struct in6_addr *daddr, u32 rnd);
605
606#ifdef CONFIG_PROC_FS
607extern int ac6_proc_init(struct net *net);
608extern void ac6_proc_exit(struct net *net);
609extern int raw6_proc_init(void);
610extern void raw6_proc_exit(void);
611extern int tcp6_proc_init(struct net *net);
612extern void tcp6_proc_exit(struct net *net);
613extern int udp6_proc_init(struct net *net);
614extern void udp6_proc_exit(struct net *net);
615extern int udplite6_proc_init(void);
616extern void udplite6_proc_exit(void);
617extern int ipv6_misc_proc_init(void);
618extern void ipv6_misc_proc_exit(void);
619extern int snmp6_register_dev(struct inet6_dev *idev);
620extern int snmp6_unregister_dev(struct inet6_dev *idev);
621
622#else
623static inline int ac6_proc_init(struct net *net) { return 0; }
624static inline void ac6_proc_exit(struct net *net) { }
625static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
626static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
627#endif
628
629#ifdef CONFIG_SYSCTL
630extern ctl_table ipv6_route_table_template[];
631extern ctl_table ipv6_icmp_table_template[];
632
633extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
634extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
635extern int ipv6_sysctl_register(void);
636extern void ipv6_sysctl_unregister(void);
637extern int ipv6_static_sysctl_register(void);
638extern void ipv6_static_sysctl_unregister(void);
639#endif
640
641#endif
642#endif
643
