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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#ifdef __KERNEL__
81#define IPV6_ADDR_MC_SCOPE(a) \
82 ((a)->s6_addr[1] & 0x0f)
83#define __IPV6_ADDR_SCOPE_INVALID -1
84#endif
85#define IPV6_ADDR_SCOPE_NODELOCAL 0x01
86#define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
87#define IPV6_ADDR_SCOPE_SITELOCAL 0x05
88#define IPV6_ADDR_SCOPE_ORGLOCAL 0x08
89#define IPV6_ADDR_SCOPE_GLOBAL 0x0e
90
91
92
93
94#ifdef __KERNEL__
95#define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \
96 ((a)->s6_addr[1] & 0x10)
97#define IPV6_ADDR_MC_FLAG_PREFIX(a) \
98 ((a)->s6_addr[1] & 0x20)
99#define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \
100 ((a)->s6_addr[1] & 0x40)
101#endif
102
103
104
105
106
107struct frag_hdr {
108 __u8 nexthdr;
109 __u8 reserved;
110 __be16 frag_off;
111 __be32 identification;
112};
113
114#define IP6_MF 0x0001
115
116#ifdef __KERNEL__
117
118#include <net/sock.h>
119
120
121extern int sysctl_mld_max_msf;
122extern struct ctl_path net_ipv6_ctl_path[];
123
124#define _DEVINC(net, statname, modifier, idev, field) \
125({ \
126 struct inet6_dev *_idev = (idev); \
127 if (likely(_idev != NULL)) \
128 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
129 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
130})
131
132#define _DEVADD(net, statname, modifier, idev, field, val) \
133({ \
134 struct inet6_dev *_idev = (idev); \
135 if (likely(_idev != NULL)) \
136 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
137 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
138})
139
140#define _DEVUPD(net, statname, modifier, idev, field, val) \
141({ \
142 struct inet6_dev *_idev = (idev); \
143 if (likely(_idev != NULL)) \
144 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
145 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
146})
147
148
149
150#define IP6_INC_STATS(net, idev,field) \
151 _DEVINC(net, ipv6, 64, idev, field)
152#define IP6_INC_STATS_BH(net, idev,field) \
153 _DEVINC(net, ipv6, 64_BH, idev, field)
154#define IP6_ADD_STATS(net, idev,field,val) \
155 _DEVADD(net, ipv6, 64, idev, field, val)
156#define IP6_ADD_STATS_BH(net, idev,field,val) \
157 _DEVADD(net, ipv6, 64_BH, idev, field, val)
158#define IP6_UPD_PO_STATS(net, idev,field,val) \
159 _DEVUPD(net, ipv6, 64, idev, field, val)
160#define IP6_UPD_PO_STATS_BH(net, idev,field,val) \
161 _DEVUPD(net, ipv6, 64_BH, idev, field, val)
162#define ICMP6_INC_STATS(net, idev, field) \
163 _DEVINC(net, icmpv6, , idev, field)
164#define ICMP6_INC_STATS_BH(net, idev, field) \
165 _DEVINC(net, icmpv6, _BH, idev, field)
166
167#define ICMP6MSGOUT_INC_STATS(net, idev, field) \
168 _DEVINC(net, icmpv6msg, , idev, field +256)
169#define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
170 _DEVINC(net, icmpv6msg, _BH, idev, field +256)
171#define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
172 _DEVINC(net, icmpv6msg, _BH, idev, field)
173
174struct ip6_ra_chain {
175 struct ip6_ra_chain *next;
176 struct sock *sk;
177 int sel;
178 void (*destructor)(struct sock *);
179};
180
181extern struct ip6_ra_chain *ip6_ra_chain;
182extern rwlock_t ip6_ra_lock;
183
184
185
186
187
188
189struct ipv6_txoptions {
190
191 int tot_len;
192
193
194
195 __u16 opt_flen;
196 __u16 opt_nflen;
197
198 struct ipv6_opt_hdr *hopopt;
199 struct ipv6_opt_hdr *dst0opt;
200 struct ipv6_rt_hdr *srcrt;
201 struct ipv6_opt_hdr *dst1opt;
202
203
204};
205
206struct ip6_flowlabel {
207 struct ip6_flowlabel *next;
208 __be32 label;
209 atomic_t users;
210 struct in6_addr dst;
211 struct ipv6_txoptions *opt;
212 unsigned long linger;
213 u8 share;
214 u32 owner;
215 unsigned long lastuse;
216 unsigned long expires;
217 struct net *fl_net;
218};
219
220#define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
221#define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
222
223struct ipv6_fl_socklist {
224 struct ipv6_fl_socklist *next;
225 struct ip6_flowlabel *fl;
226};
227
228extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
229extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
230 struct ip6_flowlabel * fl,
231 struct ipv6_txoptions * fopt);
232extern void fl6_free_socklist(struct sock *sk);
233extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
234extern int ip6_flowlabel_init(void);
235extern void ip6_flowlabel_cleanup(void);
236
237static inline void fl6_sock_release(struct ip6_flowlabel *fl)
238{
239 if (fl)
240 atomic_dec(&fl->users);
241}
242
243extern int ip6_ra_control(struct sock *sk, int sel);
244
245extern int ipv6_parse_hopopts(struct sk_buff *skb);
246
247extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
248extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
249 int newtype,
250 struct ipv6_opt_hdr __user *newopt,
251 int newoptlen);
252struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
253 struct ipv6_txoptions *opt);
254
255extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
256
257int ip6_frag_nqueues(struct net *net);
258int ip6_frag_mem(struct net *net);
259
260#define IPV6_FRAG_HIGH_THRESH (256 * 1024)
261#define IPV6_FRAG_LOW_THRESH (192 * 1024)
262#define IPV6_FRAG_TIMEOUT (60 * HZ)
263
264extern int __ipv6_addr_type(const struct in6_addr *addr);
265static inline int ipv6_addr_type(const struct in6_addr *addr)
266{
267 return __ipv6_addr_type(addr) & 0xffff;
268}
269
270static inline int ipv6_addr_scope(const struct in6_addr *addr)
271{
272 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
273}
274
275static inline int __ipv6_addr_src_scope(int type)
276{
277 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16);
278}
279
280static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
281{
282 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
283}
284
285static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
286{
287 return memcmp(a1, a2, sizeof(struct in6_addr));
288}
289
290static inline int
291ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
292 const struct in6_addr *a2)
293{
294 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
295 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
296 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
297 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));
298}
299
300static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
301{
302 memcpy(a1, a2, sizeof(struct in6_addr));
303}
304
305static inline void ipv6_addr_prefix(struct in6_addr *pfx,
306 const struct in6_addr *addr,
307 int plen)
308{
309
310 int o = plen >> 3,
311 b = plen & 0x7;
312
313 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
314 memcpy(pfx->s6_addr, addr, o);
315 if (b != 0)
316 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
317}
318
319static inline void ipv6_addr_set(struct in6_addr *addr,
320 __be32 w1, __be32 w2,
321 __be32 w3, __be32 w4)
322{
323 addr->s6_addr32[0] = w1;
324 addr->s6_addr32[1] = w2;
325 addr->s6_addr32[2] = w3;
326 addr->s6_addr32[3] = w4;
327}
328
329static inline int ipv6_addr_equal(const struct in6_addr *a1,
330 const struct in6_addr *a2)
331{
332 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
333 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
334 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
335 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
336}
337
338static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2,
339 unsigned int prefixlen)
340{
341 unsigned pdw, pbi;
342
343
344 pdw = prefixlen >> 5;
345 if (pdw && memcmp(a1, a2, pdw << 2))
346 return 0;
347
348
349 pbi = prefixlen & 0x1f;
350 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
351 return 0;
352
353 return 1;
354}
355
356static inline int ipv6_prefix_equal(const struct in6_addr *a1,
357 const struct in6_addr *a2,
358 unsigned int prefixlen)
359{
360 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
361 prefixlen);
362}
363
364struct inet_frag_queue;
365
366enum ip6_defrag_users {
367 IP6_DEFRAG_LOCAL_DELIVER,
368 IP6_DEFRAG_CONNTRACK_IN,
369 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
370 IP6_DEFRAG_CONNTRACK_OUT,
371 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
372 IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
373 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
374};
375
376struct ip6_create_arg {
377 __be32 id;
378 u32 user;
379 struct in6_addr *src;
380 struct in6_addr *dst;
381};
382
383void ip6_frag_init(struct inet_frag_queue *q, void *a);
384int ip6_frag_match(struct inet_frag_queue *q, void *a);
385
386static inline int ipv6_addr_any(const struct in6_addr *a)
387{
388 return (a->s6_addr32[0] | a->s6_addr32[1] |
389 a->s6_addr32[2] | a->s6_addr32[3]) == 0;
390}
391
392static inline int ipv6_addr_loopback(const struct in6_addr *a)
393{
394 return (a->s6_addr32[0] | a->s6_addr32[1] |
395 a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
396}
397
398static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
399{
400 return (a->s6_addr32[0] | a->s6_addr32[1] |
401 (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0;
402}
403
404
405
406
407
408static inline int ipv6_addr_orchid(const struct in6_addr *a)
409{
410 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
411}
412
413static inline void ipv6_addr_set_v4mapped(const __be32 addr,
414 struct in6_addr *v4mapped)
415{
416 ipv6_addr_set(v4mapped,
417 0, 0,
418 htonl(0x0000FFFF),
419 addr);
420}
421
422
423
424
425
426static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
427{
428 const __be32 *a1 = token1, *a2 = token2;
429 int i;
430
431 addrlen >>= 2;
432
433 for (i = 0; i < addrlen; i++) {
434 __be32 xb = a1[i] ^ a2[i];
435 if (xb)
436 return i * 32 + 31 - __fls(ntohl(xb));
437 }
438
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454
455 return addrlen << 5;
456}
457
458static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
459{
460 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
461}
462
463static __inline__ void ipv6_select_ident(struct frag_hdr *fhdr)
464{
465 static u32 ipv6_fragmentation_id = 1;
466 static DEFINE_SPINLOCK(ip6_id_lock);
467
468 spin_lock_bh(&ip6_id_lock);
469 fhdr->identification = htonl(ipv6_fragmentation_id);
470 if (++ipv6_fragmentation_id == 0)
471 ipv6_fragmentation_id = 1;
472 spin_unlock_bh(&ip6_id_lock);
473}
474
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479
480
481
482
483extern int ipv6_rcv(struct sk_buff *skb,
484 struct net_device *dev,
485 struct packet_type *pt,
486 struct net_device *orig_dev);
487
488extern int ip6_rcv_finish(struct sk_buff *skb);
489
490
491
492
493extern int ip6_xmit(struct sock *sk,
494 struct sk_buff *skb,
495 struct flowi *fl,
496 struct ipv6_txoptions *opt);
497
498extern int ip6_nd_hdr(struct sock *sk,
499 struct sk_buff *skb,
500 struct net_device *dev,
501 const struct in6_addr *saddr,
502 const struct in6_addr *daddr,
503 int proto, int len);
504
505extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
506
507extern int ip6_append_data(struct sock *sk,
508 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
509 void *from,
510 int length,
511 int transhdrlen,
512 int hlimit,
513 int tclass,
514 struct ipv6_txoptions *opt,
515 struct flowi *fl,
516 struct rt6_info *rt,
517 unsigned int flags,
518 int dontfrag);
519
520extern int ip6_push_pending_frames(struct sock *sk);
521
522extern void ip6_flush_pending_frames(struct sock *sk);
523
524extern int ip6_dst_lookup(struct sock *sk,
525 struct dst_entry **dst,
526 struct flowi *fl);
527extern int ip6_dst_blackhole(struct sock *sk,
528 struct dst_entry **dst,
529 struct flowi *fl);
530extern int ip6_sk_dst_lookup(struct sock *sk,
531 struct dst_entry **dst,
532 struct flowi *fl);
533
534
535
536
537
538extern int ip6_output(struct sk_buff *skb);
539extern int ip6_forward(struct sk_buff *skb);
540extern int ip6_input(struct sk_buff *skb);
541extern int ip6_mc_input(struct sk_buff *skb);
542
543extern int __ip6_local_out(struct sk_buff *skb);
544extern int ip6_local_out(struct sk_buff *skb);
545
546
547
548
549
550extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
551 struct ipv6_txoptions *opt,
552 u8 *proto,
553 struct in6_addr **daddr_p);
554extern void ipv6_push_frag_opts(struct sk_buff *skb,
555 struct ipv6_txoptions *opt,
556 u8 *proto);
557
558extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
559 u8 *nexthdrp);
560
561extern int ipv6_ext_hdr(u8 nexthdr);
562
563extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
564
565extern struct in6_addr *fl6_update_dst(struct flowi *fl,
566 const struct ipv6_txoptions *opt,
567 struct in6_addr *orig);
568
569
570
571
572
573extern int ipv6_setsockopt(struct sock *sk, int level,
574 int optname,
575 char __user *optval,
576 unsigned int optlen);
577extern int ipv6_getsockopt(struct sock *sk, int level,
578 int optname,
579 char __user *optval,
580 int __user *optlen);
581extern int compat_ipv6_setsockopt(struct sock *sk,
582 int level,
583 int optname,
584 char __user *optval,
585 unsigned int optlen);
586extern int compat_ipv6_getsockopt(struct sock *sk,
587 int level,
588 int optname,
589 char __user *optval,
590 int __user *optlen);
591
592extern int ip6_datagram_connect(struct sock *sk,
593 struct sockaddr *addr, int addr_len);
594
595extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
596extern int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len);
597extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
598 u32 info, u8 *payload);
599extern void ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
600extern void ipv6_local_rxpmtu(struct sock *sk, struct flowi *fl, u32 mtu);
601
602extern int inet6_release(struct socket *sock);
603extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
604 int addr_len);
605extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
606 int *uaddr_len, int peer);
607extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
608 unsigned long arg);
609
610extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
611 struct sock *sk);
612
613
614
615
616extern const struct proto_ops inet6_stream_ops;
617extern const struct proto_ops inet6_dgram_ops;
618
619struct group_source_req;
620struct group_filter;
621
622extern int ip6_mc_source(int add, int omode, struct sock *sk,
623 struct group_source_req *pgsr);
624extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
625extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
626 struct group_filter __user *optval,
627 int __user *optlen);
628extern unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
629 const struct in6_addr *daddr, u32 rnd);
630
631#ifdef CONFIG_PROC_FS
632extern int ac6_proc_init(struct net *net);
633extern void ac6_proc_exit(struct net *net);
634extern int raw6_proc_init(void);
635extern void raw6_proc_exit(void);
636extern int tcp6_proc_init(struct net *net);
637extern void tcp6_proc_exit(struct net *net);
638extern int udp6_proc_init(struct net *net);
639extern void udp6_proc_exit(struct net *net);
640extern int udplite6_proc_init(void);
641extern void udplite6_proc_exit(void);
642extern int ipv6_misc_proc_init(void);
643extern void ipv6_misc_proc_exit(void);
644extern int snmp6_register_dev(struct inet6_dev *idev);
645extern int snmp6_unregister_dev(struct inet6_dev *idev);
646
647#else
648static inline int ac6_proc_init(struct net *net) { return 0; }
649static inline void ac6_proc_exit(struct net *net) { }
650static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
651static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
652#endif
653
654#ifdef CONFIG_SYSCTL
655extern ctl_table ipv6_route_table_template[];
656extern ctl_table ipv6_icmp_table_template[];
657
658extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
659extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
660extern int ipv6_sysctl_register(void);
661extern void ipv6_sysctl_unregister(void);
662extern int ipv6_static_sysctl_register(void);
663extern void ipv6_static_sysctl_unregister(void);
664#endif
665
666#endif
667#endif
668