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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
77
78
79
80#define IPV6_ADDR_MC_SCOPE(a) \
81 ((a)->s6_addr[1] & 0x0f)
82#define __IPV6_ADDR_SCOPE_INVALID -1
83#define IPV6_ADDR_SCOPE_NODELOCAL 0x01
84#define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
85#define IPV6_ADDR_SCOPE_SITELOCAL 0x05
86#define IPV6_ADDR_SCOPE_ORGLOCAL 0x08
87#define IPV6_ADDR_SCOPE_GLOBAL 0x0e
88
89
90
91
92#define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \
93 ((a)->s6_addr[1] & 0x10)
94#define IPV6_ADDR_MC_FLAG_PREFIX(a) \
95 ((a)->s6_addr[1] & 0x20)
96#define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \
97 ((a)->s6_addr[1] & 0x40)
98
99
100
101
102
103struct frag_hdr {
104 __u8 nexthdr;
105 __u8 reserved;
106 __be16 frag_off;
107 __be32 identification;
108};
109
110#define IP6_MF 0x0001
111
112#include <net/sock.h>
113
114
115extern int sysctl_mld_max_msf;
116extern struct ctl_path net_ipv6_ctl_path[];
117
118#define _DEVINC(net, statname, modifier, idev, field) \
119({ \
120 struct inet6_dev *_idev = (idev); \
121 if (likely(_idev != NULL)) \
122 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
123 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
124})
125
126
127#define _DEVINCATOMIC(net, statname, modifier, idev, field) \
128({ \
129 struct inet6_dev *_idev = (idev); \
130 if (likely(_idev != NULL)) \
131 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
132 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
133})
134
135#define _DEVADD(net, statname, modifier, idev, field, val) \
136({ \
137 struct inet6_dev *_idev = (idev); \
138 if (likely(_idev != NULL)) \
139 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
140 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
141})
142
143#define _DEVUPD(net, statname, modifier, idev, field, val) \
144({ \
145 struct inet6_dev *_idev = (idev); \
146 if (likely(_idev != NULL)) \
147 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
148 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
149})
150
151
152
153#define IP6_INC_STATS(net, idev,field) \
154 _DEVINC(net, ipv6, 64, idev, field)
155#define IP6_INC_STATS_BH(net, idev,field) \
156 _DEVINC(net, ipv6, 64_BH, idev, field)
157#define IP6_ADD_STATS(net, idev,field,val) \
158 _DEVADD(net, ipv6, 64, idev, field, val)
159#define IP6_ADD_STATS_BH(net, idev,field,val) \
160 _DEVADD(net, ipv6, 64_BH, idev, field, val)
161#define IP6_UPD_PO_STATS(net, idev,field,val) \
162 _DEVUPD(net, ipv6, 64, idev, field, val)
163#define IP6_UPD_PO_STATS_BH(net, idev,field,val) \
164 _DEVUPD(net, ipv6, 64_BH, idev, field, val)
165#define ICMP6_INC_STATS(net, idev, field) \
166 _DEVINCATOMIC(net, icmpv6, , idev, field)
167#define ICMP6_INC_STATS_BH(net, idev, field) \
168 _DEVINCATOMIC(net, icmpv6, _BH, idev, field)
169
170#define ICMP6MSGOUT_INC_STATS(net, idev, field) \
171 _DEVINCATOMIC(net, icmpv6msg, , idev, field +256)
172#define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
173 _DEVINCATOMIC(net, icmpv6msg, _BH, idev, field +256)
174#define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
175 _DEVINCATOMIC(net, icmpv6msg, _BH, idev, field)
176
177struct ip6_ra_chain {
178 struct ip6_ra_chain *next;
179 struct sock *sk;
180 int sel;
181 void (*destructor)(struct sock *);
182};
183
184extern struct ip6_ra_chain *ip6_ra_chain;
185extern rwlock_t ip6_ra_lock;
186
187
188
189
190
191
192struct ipv6_txoptions {
193
194 int tot_len;
195
196
197
198 __u16 opt_flen;
199 __u16 opt_nflen;
200
201 struct ipv6_opt_hdr *hopopt;
202 struct ipv6_opt_hdr *dst0opt;
203 struct ipv6_rt_hdr *srcrt;
204 struct ipv6_opt_hdr *dst1opt;
205
206
207};
208
209struct ip6_flowlabel {
210 struct ip6_flowlabel *next;
211 __be32 label;
212 atomic_t users;
213 struct in6_addr dst;
214 struct ipv6_txoptions *opt;
215 unsigned long linger;
216 u8 share;
217 u32 owner;
218 unsigned long lastuse;
219 unsigned long expires;
220 struct net *fl_net;
221};
222
223#define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
224#define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
225
226struct ipv6_fl_socklist {
227 struct ipv6_fl_socklist *next;
228 struct ip6_flowlabel *fl;
229};
230
231extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
232extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
233 struct ip6_flowlabel * fl,
234 struct ipv6_txoptions * fopt);
235extern void fl6_free_socklist(struct sock *sk);
236extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
237extern int ip6_flowlabel_init(void);
238extern void ip6_flowlabel_cleanup(void);
239
240static inline void fl6_sock_release(struct ip6_flowlabel *fl)
241{
242 if (fl)
243 atomic_dec(&fl->users);
244}
245
246extern int ip6_ra_control(struct sock *sk, int sel);
247
248extern int ipv6_parse_hopopts(struct sk_buff *skb);
249
250extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
251extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
252 int newtype,
253 struct ipv6_opt_hdr __user *newopt,
254 int newoptlen);
255struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
256 struct ipv6_txoptions *opt);
257
258extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
259
260int ip6_frag_nqueues(struct net *net);
261int ip6_frag_mem(struct net *net);
262
263#define IPV6_FRAG_HIGH_THRESH (256 * 1024)
264#define IPV6_FRAG_LOW_THRESH (192 * 1024)
265#define IPV6_FRAG_TIMEOUT (60 * HZ)
266
267extern int __ipv6_addr_type(const struct in6_addr *addr);
268static inline int ipv6_addr_type(const struct in6_addr *addr)
269{
270 return __ipv6_addr_type(addr) & 0xffff;
271}
272
273static inline int ipv6_addr_scope(const struct in6_addr *addr)
274{
275 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
276}
277
278static inline int __ipv6_addr_src_scope(int type)
279{
280 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16);
281}
282
283static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
284{
285 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
286}
287
288static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
289{
290 return memcmp(a1, a2, sizeof(struct in6_addr));
291}
292
293static inline int
294ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
295 const struct in6_addr *a2)
296{
297 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
298 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
299 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
300 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));
301}
302
303static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
304{
305 memcpy(a1, a2, sizeof(struct in6_addr));
306}
307
308static inline void ipv6_addr_prefix(struct in6_addr *pfx,
309 const struct in6_addr *addr,
310 int plen)
311{
312
313 int o = plen >> 3,
314 b = plen & 0x7;
315
316 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
317 memcpy(pfx->s6_addr, addr, o);
318 if (b != 0)
319 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
320}
321
322static inline void ipv6_addr_set(struct in6_addr *addr,
323 __be32 w1, __be32 w2,
324 __be32 w3, __be32 w4)
325{
326 addr->s6_addr32[0] = w1;
327 addr->s6_addr32[1] = w2;
328 addr->s6_addr32[2] = w3;
329 addr->s6_addr32[3] = w4;
330}
331
332static inline int ipv6_addr_equal(const struct in6_addr *a1,
333 const struct in6_addr *a2)
334{
335 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
336 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
337 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
338 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
339}
340
341static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
342 unsigned int prefixlen)
343{
344 unsigned pdw, pbi;
345
346
347 pdw = prefixlen >> 5;
348 if (pdw && memcmp(a1, a2, pdw << 2))
349 return 0;
350
351
352 pbi = prefixlen & 0x1f;
353 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
354 return 0;
355
356 return 1;
357}
358
359static inline int ipv6_prefix_equal(const struct in6_addr *a1,
360 const struct in6_addr *a2,
361 unsigned int prefixlen)
362{
363 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
364 prefixlen);
365}
366
367struct inet_frag_queue;
368
369enum ip6_defrag_users {
370 IP6_DEFRAG_LOCAL_DELIVER,
371 IP6_DEFRAG_CONNTRACK_IN,
372 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
373 IP6_DEFRAG_CONNTRACK_OUT,
374 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
375 IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
376 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
377};
378
379struct ip6_create_arg {
380 __be32 id;
381 u32 user;
382 const struct in6_addr *src;
383 const struct in6_addr *dst;
384};
385
386void ip6_frag_init(struct inet_frag_queue *q, void *a);
387int ip6_frag_match(struct inet_frag_queue *q, void *a);
388
389static inline int ipv6_addr_any(const struct in6_addr *a)
390{
391 return (a->s6_addr32[0] | a->s6_addr32[1] |
392 a->s6_addr32[2] | a->s6_addr32[3]) == 0;
393}
394
395static inline int ipv6_addr_loopback(const struct in6_addr *a)
396{
397 return (a->s6_addr32[0] | a->s6_addr32[1] |
398 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
399}
400
401static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
402{
403 return (a->s6_addr32[0] | a->s6_addr32[1] |
404 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0;
405}
406
407
408
409
410
411static inline int ipv6_addr_orchid(const struct in6_addr *a)
412{
413 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
414}
415
416static inline void ipv6_addr_set_v4mapped(const __be32 addr,
417 struct in6_addr *v4mapped)
418{
419 ipv6_addr_set(v4mapped,
420 0, 0,
421 htonl(0x0000FFFF),
422 addr);
423}
424
425
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427
428
429static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
430{
431 const __be32 *a1 = token1, *a2 = token2;
432 int i;
433
434 addrlen >>= 2;
435
436 for (i = 0; i < addrlen; i++) {
437 __be32 xb = a1[i] ^ a2[i];
438 if (xb)
439 return i * 32 + 31 - __fls(ntohl(xb));
440 }
441
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456
457
458 return addrlen << 5;
459}
460
461static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
462{
463 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
464}
465
466extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt);
467
468
469
470
471
472
473
474
475
476extern int ipv6_rcv(struct sk_buff *skb,
477 struct net_device *dev,
478 struct packet_type *pt,
479 struct net_device *orig_dev);
480
481extern int ip6_rcv_finish(struct sk_buff *skb);
482
483
484
485
486extern int ip6_xmit(struct sock *sk,
487 struct sk_buff *skb,
488 struct flowi6 *fl6,
489 struct ipv6_txoptions *opt,
490 int tclass);
491
492extern int ip6_nd_hdr(struct sock *sk,
493 struct sk_buff *skb,
494 struct net_device *dev,
495 const struct in6_addr *saddr,
496 const struct in6_addr *daddr,
497 int proto, int len);
498
499extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
500
501extern int ip6_append_data(struct sock *sk,
502 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
503 void *from,
504 int length,
505 int transhdrlen,
506 int hlimit,
507 int tclass,
508 struct ipv6_txoptions *opt,
509 struct flowi6 *fl6,
510 struct rt6_info *rt,
511 unsigned int flags,
512 int dontfrag);
513
514extern int ip6_push_pending_frames(struct sock *sk);
515
516extern void ip6_flush_pending_frames(struct sock *sk);
517
518extern int ip6_dst_lookup(struct sock *sk,
519 struct dst_entry **dst,
520 struct flowi6 *fl6);
521extern struct dst_entry * ip6_dst_lookup_flow(struct sock *sk,
522 struct flowi6 *fl6,
523 const struct in6_addr *final_dst,
524 bool can_sleep);
525extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk,
526 struct flowi6 *fl6,
527 const struct in6_addr *final_dst,
528 bool can_sleep);
529extern struct dst_entry * ip6_blackhole_route(struct net *net,
530 struct dst_entry *orig_dst);
531
532
533
534
535
536extern int ip6_output(struct sk_buff *skb);
537extern int ip6_forward(struct sk_buff *skb);
538extern int ip6_input(struct sk_buff *skb);
539extern int ip6_mc_input(struct sk_buff *skb);
540
541extern int __ip6_local_out(struct sk_buff *skb);
542extern int ip6_local_out(struct sk_buff *skb);
543
544
545
546
547
548extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
549 struct ipv6_txoptions *opt,
550 u8 *proto,
551 struct in6_addr **daddr_p);
552extern void ipv6_push_frag_opts(struct sk_buff *skb,
553 struct ipv6_txoptions *opt,
554 u8 *proto);
555
556extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
557 u8 *nexthdrp);
558
559extern int ipv6_ext_hdr(u8 nexthdr);
560
561extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
562
563extern struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
564 const struct ipv6_txoptions *opt,
565 struct in6_addr *orig);
566
567
568
569
570
571extern int ipv6_setsockopt(struct sock *sk, int level,
572 int optname,
573 char __user *optval,
574 unsigned int optlen);
575extern int ipv6_getsockopt(struct sock *sk, int level,
576 int optname,
577 char __user *optval,
578 int __user *optlen);
579extern int compat_ipv6_setsockopt(struct sock *sk,
580 int level,
581 int optname,
582 char __user *optval,
583 unsigned int optlen);
584extern int compat_ipv6_getsockopt(struct sock *sk,
585 int level,
586 int optname,
587 char __user *optval,
588 int __user *optlen);
589
590extern int ip6_datagram_connect(struct sock *sk,
591 struct sockaddr *addr, int addr_len);
592
593extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
594extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len);
595extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
596 u32 info, u8 *payload);
597extern void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
598extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu);
599
600extern int inet6_release(struct socket *sock);
601extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
602 int addr_len);
603extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
604 int *uaddr_len, int peer);
605extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
606 unsigned long arg);
607
608extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
609 struct sock *sk);
610
611
612
613
614extern const struct proto_ops inet6_stream_ops;
615extern const struct proto_ops inet6_dgram_ops;
616
617struct group_source_req;
618struct group_filter;
619
620extern int ip6_mc_source(int add, int omode, struct sock *sk,
621 struct group_source_req *pgsr);
622extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
623extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
624 struct group_filter __user *optval,
625 int __user *optlen);
626extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
627 const struct in6_addr *daddr, u32 rnd);
628
629#ifdef CONFIG_PROC_FS
630extern int ac6_proc_init(struct net *net);
631extern void ac6_proc_exit(struct net *net);
632extern int raw6_proc_init(void);
633extern void raw6_proc_exit(void);
634extern int tcp6_proc_init(struct net *net);
635extern void tcp6_proc_exit(struct net *net);
636extern int udp6_proc_init(struct net *net);
637extern void udp6_proc_exit(struct net *net);
638extern int udplite6_proc_init(void);
639extern void udplite6_proc_exit(void);
640extern int ipv6_misc_proc_init(void);
641extern void ipv6_misc_proc_exit(void);
642extern int snmp6_register_dev(struct inet6_dev *idev);
643extern int snmp6_unregister_dev(struct inet6_dev *idev);
644
645#else
646static inline int ac6_proc_init(struct net *net) { return 0; }
647static inline void ac6_proc_exit(struct net *net) { }
648static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
649static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
650#endif
651
652#ifdef CONFIG_SYSCTL
653extern ctl_table ipv6_route_table_template[];
654extern ctl_table ipv6_icmp_table_template[];
655
656extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
657extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
658extern int ipv6_sysctl_register(void);
659extern void ipv6_sysctl_unregister(void);
660extern int ipv6_static_sysctl_register(void);
661extern void ipv6_static_sysctl_unregister(void);
662#endif
663
664#endif
665
