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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 <linux/jhash.h>
19#include <net/if_inet6.h>
20#include <net/ndisc.h>
21#include <net/flow.h>
22#include <net/flow_keys.h>
23#include <net/snmp.h>
24
25#define SIN6_LEN_RFC2133 24
26
27#define IPV6_MAXPLEN 65535
28
29
30
31
32
33#define NEXTHDR_HOP 0
34#define NEXTHDR_TCP 6
35#define NEXTHDR_UDP 17
36#define NEXTHDR_IPV6 41
37#define NEXTHDR_ROUTING 43
38#define NEXTHDR_FRAGMENT 44
39#define NEXTHDR_GRE 47
40#define NEXTHDR_ESP 50
41#define NEXTHDR_AUTH 51
42#define NEXTHDR_ICMP 58
43#define NEXTHDR_NONE 59
44#define NEXTHDR_DEST 60
45#define NEXTHDR_SCTP 132
46#define NEXTHDR_MOBILITY 135
47
48#define NEXTHDR_MAX 255
49
50
51
52#define IPV6_DEFAULT_HOPLIMIT 64
53#define IPV6_DEFAULT_MCASTHOPS 1
54
55
56
57
58
59
60
61
62
63
64
65
66#define IPV6_ADDR_ANY 0x0000U
67
68#define IPV6_ADDR_UNICAST 0x0001U
69#define IPV6_ADDR_MULTICAST 0x0002U
70
71#define IPV6_ADDR_LOOPBACK 0x0010U
72#define IPV6_ADDR_LINKLOCAL 0x0020U
73#define IPV6_ADDR_SITELOCAL 0x0040U
74
75#define IPV6_ADDR_COMPATv4 0x0080U
76
77#define IPV6_ADDR_SCOPE_MASK 0x00f0U
78
79#define IPV6_ADDR_MAPPED 0x1000U
80
81
82
83
84#define IPV6_ADDR_MC_SCOPE(a) \
85 ((a)->s6_addr[1] & 0x0f)
86#define __IPV6_ADDR_SCOPE_INVALID -1
87#define IPV6_ADDR_SCOPE_NODELOCAL 0x01
88#define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
89#define IPV6_ADDR_SCOPE_SITELOCAL 0x05
90#define IPV6_ADDR_SCOPE_ORGLOCAL 0x08
91#define IPV6_ADDR_SCOPE_GLOBAL 0x0e
92
93
94
95
96#define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \
97 ((a)->s6_addr[1] & 0x10)
98#define IPV6_ADDR_MC_FLAG_PREFIX(a) \
99 ((a)->s6_addr[1] & 0x20)
100#define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \
101 ((a)->s6_addr[1] & 0x40)
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#define IP6_OFFSET 0xFFF8
116
117#define IP6_REPLY_MARK(net, mark) \
118 ((net)->ipv6.sysctl.fwmark_reflect ? (mark) : 0)
119
120#include <net/sock.h>
121
122
123extern int sysctl_mld_max_msf;
124
125#define _DEVINC(net, statname, modifier, idev, field) \
126({ \
127 struct inet6_dev *_idev = (idev); \
128 if (likely(_idev != NULL)) \
129 SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \
130 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
131})
132
133
134#define _DEVINCATOMIC(net, statname, modifier, idev, field) \
135({ \
136 struct inet6_dev *_idev = (idev); \
137 if (likely(_idev != NULL)) \
138 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
139 SNMP_INC_STATS##modifier((net)->mib.statname##_statistics, (field));\
140})
141
142
143#define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \
144({ \
145 struct inet6_dev *_idev = (idev); \
146 if (likely(_idev != NULL)) \
147 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
148 SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\
149})
150
151#define _DEVADD(net, statname, modifier, idev, field, val) \
152({ \
153 struct inet6_dev *_idev = (idev); \
154 if (likely(_idev != NULL)) \
155 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
156 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
157})
158
159#define _DEVUPD(net, statname, modifier, idev, field, val) \
160({ \
161 struct inet6_dev *_idev = (idev); \
162 if (likely(_idev != NULL)) \
163 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
164 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
165})
166
167
168
169#define IP6_INC_STATS(net, idev,field) \
170 _DEVINC(net, ipv6, 64, idev, field)
171#define IP6_INC_STATS_BH(net, idev,field) \
172 _DEVINC(net, ipv6, 64_BH, idev, field)
173#define IP6_ADD_STATS(net, idev,field,val) \
174 _DEVADD(net, ipv6, 64, idev, field, val)
175#define IP6_ADD_STATS_BH(net, idev,field,val) \
176 _DEVADD(net, ipv6, 64_BH, idev, field, val)
177#define IP6_UPD_PO_STATS(net, idev,field,val) \
178 _DEVUPD(net, ipv6, 64, idev, field, val)
179#define IP6_UPD_PO_STATS_BH(net, idev,field,val) \
180 _DEVUPD(net, ipv6, 64_BH, idev, field, val)
181#define ICMP6_INC_STATS(net, idev, field) \
182 _DEVINCATOMIC(net, icmpv6, , idev, field)
183#define ICMP6_INC_STATS_BH(net, idev, field) \
184 _DEVINCATOMIC(net, icmpv6, _BH, idev, field)
185
186#define ICMP6MSGOUT_INC_STATS(net, idev, field) \
187 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
188#define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
189 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
190#define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
191 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field)
192
193struct ip6_ra_chain {
194 struct ip6_ra_chain *next;
195 struct sock *sk;
196 int sel;
197 void (*destructor)(struct sock *);
198};
199
200extern struct ip6_ra_chain *ip6_ra_chain;
201extern rwlock_t ip6_ra_lock;
202
203
204
205
206
207
208struct ipv6_txoptions {
209
210 int tot_len;
211
212
213
214 __u16 opt_flen;
215 __u16 opt_nflen;
216
217 struct ipv6_opt_hdr *hopopt;
218 struct ipv6_opt_hdr *dst0opt;
219 struct ipv6_rt_hdr *srcrt;
220 struct ipv6_opt_hdr *dst1opt;
221
222
223};
224
225struct ip6_flowlabel {
226 struct ip6_flowlabel __rcu *next;
227 __be32 label;
228 atomic_t users;
229 struct in6_addr dst;
230 struct ipv6_txoptions *opt;
231 unsigned long linger;
232 struct rcu_head rcu;
233 u8 share;
234 union {
235 struct pid *pid;
236 kuid_t uid;
237 } owner;
238 unsigned long lastuse;
239 unsigned long expires;
240 struct net *fl_net;
241};
242
243#define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
244#define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
245#define IPV6_TCLASS_MASK (IPV6_FLOWINFO_MASK & ~IPV6_FLOWLABEL_MASK)
246#define IPV6_TCLASS_SHIFT 20
247
248struct ipv6_fl_socklist {
249 struct ipv6_fl_socklist __rcu *next;
250 struct ip6_flowlabel *fl;
251 struct rcu_head rcu;
252};
253
254struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
255struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space,
256 struct ip6_flowlabel *fl,
257 struct ipv6_txoptions *fopt);
258void fl6_free_socklist(struct sock *sk);
259int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
260int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq,
261 int flags);
262int ip6_flowlabel_init(void);
263void ip6_flowlabel_cleanup(void);
264
265static inline void fl6_sock_release(struct ip6_flowlabel *fl)
266{
267 if (fl)
268 atomic_dec(&fl->users);
269}
270
271void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info);
272
273int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
274 struct icmp6hdr *thdr, int len);
275
276int ip6_ra_control(struct sock *sk, int sel);
277
278int ipv6_parse_hopopts(struct sk_buff *skb);
279
280struct ipv6_txoptions *ipv6_dup_options(struct sock *sk,
281 struct ipv6_txoptions *opt);
282struct ipv6_txoptions *ipv6_renew_options(struct sock *sk,
283 struct ipv6_txoptions *opt,
284 int newtype,
285 struct ipv6_opt_hdr __user *newopt,
286 int newoptlen);
287struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
288 struct ipv6_txoptions *opt);
289
290bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb);
291
292static inline bool ipv6_accept_ra(struct inet6_dev *idev)
293{
294
295
296
297 return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 :
298 idev->cnf.accept_ra;
299}
300
301#if IS_ENABLED(CONFIG_IPV6)
302static inline int ip6_frag_mem(struct net *net)
303{
304 return sum_frag_mem_limit(&net->ipv6.frags);
305}
306#endif
307
308#define IPV6_FRAG_HIGH_THRESH (4 * 1024*1024)
309#define IPV6_FRAG_LOW_THRESH (3 * 1024*1024)
310#define IPV6_FRAG_TIMEOUT (60 * HZ)
311
312int __ipv6_addr_type(const struct in6_addr *addr);
313static inline int ipv6_addr_type(const struct in6_addr *addr)
314{
315 return __ipv6_addr_type(addr) & 0xffff;
316}
317
318static inline int ipv6_addr_scope(const struct in6_addr *addr)
319{
320 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
321}
322
323static inline int __ipv6_addr_src_scope(int type)
324{
325 return (type == IPV6_ADDR_ANY) ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16);
326}
327
328static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
329{
330 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
331}
332
333static inline bool __ipv6_addr_needs_scope_id(int type)
334{
335 return type & IPV6_ADDR_LINKLOCAL ||
336 (type & IPV6_ADDR_MULTICAST &&
337 (type & (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL)));
338}
339
340static inline __u32 ipv6_iface_scope_id(const struct in6_addr *addr, int iface)
341{
342 return __ipv6_addr_needs_scope_id(__ipv6_addr_type(addr)) ? iface : 0;
343}
344
345static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
346{
347 return memcmp(a1, a2, sizeof(struct in6_addr));
348}
349
350static inline bool
351ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
352 const struct in6_addr *a2)
353{
354#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
355 const unsigned long *ul1 = (const unsigned long *)a1;
356 const unsigned long *ulm = (const unsigned long *)m;
357 const unsigned long *ul2 = (const unsigned long *)a2;
358
359 return !!(((ul1[0] ^ ul2[0]) & ulm[0]) |
360 ((ul1[1] ^ ul2[1]) & ulm[1]));
361#else
362 return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |
363 ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |
364 ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |
365 ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));
366#endif
367}
368
369static inline void ipv6_addr_prefix(struct in6_addr *pfx,
370 const struct in6_addr *addr,
371 int plen)
372{
373
374 int o = plen >> 3,
375 b = plen & 0x7;
376
377 memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));
378 memcpy(pfx->s6_addr, addr, o);
379 if (b != 0)
380 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
381}
382
383static inline void __ipv6_addr_set_half(__be32 *addr,
384 __be32 wh, __be32 wl)
385{
386#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
387#if defined(__BIG_ENDIAN)
388 if (__builtin_constant_p(wh) && __builtin_constant_p(wl)) {
389 *(__force u64 *)addr = ((__force u64)(wh) << 32 | (__force u64)(wl));
390 return;
391 }
392#elif defined(__LITTLE_ENDIAN)
393 if (__builtin_constant_p(wl) && __builtin_constant_p(wh)) {
394 *(__force u64 *)addr = ((__force u64)(wl) << 32 | (__force u64)(wh));
395 return;
396 }
397#endif
398#endif
399 addr[0] = wh;
400 addr[1] = wl;
401}
402
403static inline void ipv6_addr_set(struct in6_addr *addr,
404 __be32 w1, __be32 w2,
405 __be32 w3, __be32 w4)
406{
407 __ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2);
408 __ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4);
409}
410
411static inline bool ipv6_addr_equal(const struct in6_addr *a1,
412 const struct in6_addr *a2)
413{
414#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
415 const unsigned long *ul1 = (const unsigned long *)a1;
416 const unsigned long *ul2 = (const unsigned long *)a2;
417
418 return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL;
419#else
420 return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
421 (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
422 (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
423 (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
424#endif
425}
426
427#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
428static inline bool __ipv6_prefix_equal64_half(const __be64 *a1,
429 const __be64 *a2,
430 unsigned int len)
431{
432 if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len))))
433 return false;
434 return true;
435}
436
437static inline bool ipv6_prefix_equal(const struct in6_addr *addr1,
438 const struct in6_addr *addr2,
439 unsigned int prefixlen)
440{
441 const __be64 *a1 = (const __be64 *)addr1;
442 const __be64 *a2 = (const __be64 *)addr2;
443
444 if (prefixlen >= 64) {
445 if (a1[0] ^ a2[0])
446 return false;
447 return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64);
448 }
449 return __ipv6_prefix_equal64_half(a1, a2, prefixlen);
450}
451#else
452static inline bool ipv6_prefix_equal(const struct in6_addr *addr1,
453 const struct in6_addr *addr2,
454 unsigned int prefixlen)
455{
456 const __be32 *a1 = addr1->s6_addr32;
457 const __be32 *a2 = addr2->s6_addr32;
458 unsigned int pdw, pbi;
459
460
461 pdw = prefixlen >> 5;
462 if (pdw && memcmp(a1, a2, pdw << 2))
463 return false;
464
465
466 pbi = prefixlen & 0x1f;
467 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
468 return false;
469
470 return true;
471}
472#endif
473
474struct inet_frag_queue;
475
476enum ip6_defrag_users {
477 IP6_DEFRAG_LOCAL_DELIVER,
478 IP6_DEFRAG_CONNTRACK_IN,
479 __IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHRT_MAX,
480 IP6_DEFRAG_CONNTRACK_OUT,
481 __IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
482 IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
483 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
484};
485
486struct ip6_create_arg {
487 __be32 id;
488 u32 user;
489 const struct in6_addr *src;
490 const struct in6_addr *dst;
491 u8 ecn;
492};
493
494void ip6_frag_init(struct inet_frag_queue *q, const void *a);
495bool ip6_frag_match(const struct inet_frag_queue *q, const void *a);
496
497
498
499
500struct frag_queue {
501 struct inet_frag_queue q;
502
503 __be32 id;
504 u32 user;
505 struct in6_addr saddr;
506 struct in6_addr daddr;
507
508 int iif;
509 unsigned int csum;
510 __u16 nhoffset;
511 u8 ecn;
512};
513
514void ip6_expire_frag_queue(struct net *net, struct frag_queue *fq,
515 struct inet_frags *frags);
516
517static inline bool ipv6_addr_any(const struct in6_addr *a)
518{
519#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
520 const unsigned long *ul = (const unsigned long *)a;
521
522 return (ul[0] | ul[1]) == 0UL;
523#else
524 return (a->s6_addr32[0] | a->s6_addr32[1] |
525 a->s6_addr32[2] | a->s6_addr32[3]) == 0;
526#endif
527}
528
529static inline u32 ipv6_addr_hash(const struct in6_addr *a)
530{
531#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
532 const unsigned long *ul = (const unsigned long *)a;
533 unsigned long x = ul[0] ^ ul[1];
534
535 return (u32)(x ^ (x >> 32));
536#else
537 return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^
538 a->s6_addr32[2] ^ a->s6_addr32[3]);
539#endif
540}
541
542
543static inline u32 __ipv6_addr_jhash(const struct in6_addr *a, const u32 initval)
544{
545 u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1];
546
547 return jhash_3words(v,
548 (__force u32)a->s6_addr32[2],
549 (__force u32)a->s6_addr32[3],
550 initval);
551}
552
553static inline bool ipv6_addr_loopback(const struct in6_addr *a)
554{
555#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
556 const __be64 *be = (const __be64 *)a;
557
558 return (be[0] | (be[1] ^ cpu_to_be64(1))) == 0UL;
559#else
560 return (a->s6_addr32[0] | a->s6_addr32[1] |
561 a->s6_addr32[2] | (a->s6_addr32[3] ^ cpu_to_be32(1))) == 0;
562#endif
563}
564
565
566
567
568
569static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
570{
571 return (
572#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
573 *(unsigned long *)a |
574#else
575 (__force unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) |
576#endif
577 (__force unsigned long)(a->s6_addr32[2] ^
578 cpu_to_be32(0x0000ffff))) == 0UL;
579}
580
581
582
583
584
585static inline bool ipv6_addr_orchid(const struct in6_addr *a)
586{
587 return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);
588}
589
590static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
591{
592 return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);
593}
594
595static inline void ipv6_addr_set_v4mapped(const __be32 addr,
596 struct in6_addr *v4mapped)
597{
598 ipv6_addr_set(v4mapped,
599 0, 0,
600 htonl(0x0000FFFF),
601 addr);
602}
603
604
605
606
607
608static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen)
609{
610 const __be32 *a1 = token1, *a2 = token2;
611 int i;
612
613 addrlen >>= 2;
614
615 for (i = 0; i < addrlen; i++) {
616 __be32 xb = a1[i] ^ a2[i];
617 if (xb)
618 return i * 32 + 31 - __fls(ntohl(xb));
619 }
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637 return addrlen << 5;
638}
639
640#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
641static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen)
642{
643 const __be64 *a1 = token1, *a2 = token2;
644 int i;
645
646 addrlen >>= 3;
647
648 for (i = 0; i < addrlen; i++) {
649 __be64 xb = a1[i] ^ a2[i];
650 if (xb)
651 return i * 64 + 63 - __fls(be64_to_cpu(xb));
652 }
653
654 return addrlen << 6;
655}
656#endif
657
658static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
659{
660#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
661 if (__builtin_constant_p(addrlen) && !(addrlen & 7))
662 return __ipv6_addr_diff64(token1, token2, addrlen);
663#endif
664 return __ipv6_addr_diff32(token1, token2, addrlen);
665}
666
667static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
668{
669 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
670}
671
672int ip6_dst_hoplimit(struct dst_entry *dst);
673
674static inline int ip6_sk_dst_hoplimit(struct ipv6_pinfo *np, struct flowi6 *fl6,
675 struct dst_entry *dst)
676{
677 int hlimit;
678
679 if (ipv6_addr_is_multicast(&fl6->daddr))
680 hlimit = np->mcast_hops;
681 else
682 hlimit = np->hop_limit;
683 if (hlimit < 0)
684 hlimit = ip6_dst_hoplimit(dst);
685 return hlimit;
686}
687
688#if IS_ENABLED(CONFIG_IPV6)
689static inline void ip6_set_txhash(struct sock *sk)
690{
691 struct inet_sock *inet = inet_sk(sk);
692 struct ipv6_pinfo *np = inet6_sk(sk);
693 struct flow_keys keys;
694
695 keys.src = (__force __be32)ipv6_addr_hash(&np->saddr);
696 keys.dst = (__force __be32)ipv6_addr_hash(&sk->sk_v6_daddr);
697 keys.port16[0] = inet->inet_sport;
698 keys.port16[1] = inet->inet_dport;
699
700 sk->sk_txhash = flow_hash_from_keys(&keys);
701}
702
703static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb,
704 __be32 flowlabel, bool autolabel)
705{
706 if (!flowlabel && (autolabel || net->ipv6.sysctl.auto_flowlabels)) {
707 __be32 hash;
708
709 hash = skb_get_hash(skb);
710
711
712
713
714
715 hash ^= hash >> 12;
716
717 flowlabel = hash & IPV6_FLOWLABEL_MASK;
718 }
719
720 return flowlabel;
721}
722#else
723static inline void ip6_set_txhash(struct sock *sk) { }
724static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb,
725 __be32 flowlabel, bool autolabel)
726{
727 return flowlabel;
728}
729#endif
730
731
732
733
734
735static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass,
736 __be32 flowlabel)
737{
738 *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel;
739}
740
741static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr)
742{
743 return *(__be32 *)hdr & IPV6_FLOWINFO_MASK;
744}
745
746static inline __be32 ip6_flowlabel(const struct ipv6hdr *hdr)
747{
748 return *(__be32 *)hdr & IPV6_FLOWLABEL_MASK;
749}
750
751static inline u8 ip6_tclass(__be32 flowinfo)
752{
753 return ntohl(flowinfo & IPV6_TCLASS_MASK) >> IPV6_TCLASS_SHIFT;
754}
755
756
757
758
759
760
761
762
763int ipv6_rcv(struct sk_buff *skb, struct net_device *dev,
764 struct packet_type *pt, struct net_device *orig_dev);
765
766int ip6_rcv_finish(struct sk_buff *skb);
767
768
769
770
771int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
772 struct ipv6_txoptions *opt, int tclass);
773
774int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
775
776int ip6_append_data(struct sock *sk,
777 int getfrag(void *from, char *to, int offset, int len,
778 int odd, struct sk_buff *skb),
779 void *from, int length, int transhdrlen, int hlimit,
780 int tclass, struct ipv6_txoptions *opt, struct flowi6 *fl6,
781 struct rt6_info *rt, unsigned int flags, int dontfrag);
782
783int ip6_push_pending_frames(struct sock *sk);
784
785void ip6_flush_pending_frames(struct sock *sk);
786
787int ip6_dst_lookup(struct sock *sk, struct dst_entry **dst, struct flowi6 *fl6);
788struct dst_entry *ip6_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
789 const struct in6_addr *final_dst);
790struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
791 const struct in6_addr *final_dst);
792struct dst_entry *ip6_blackhole_route(struct net *net,
793 struct dst_entry *orig_dst);
794
795
796
797
798
799int ip6_output(struct sock *sk, struct sk_buff *skb);
800int ip6_forward(struct sk_buff *skb);
801int ip6_input(struct sk_buff *skb);
802int ip6_mc_input(struct sk_buff *skb);
803
804int __ip6_local_out(struct sk_buff *skb);
805int ip6_local_out(struct sk_buff *skb);
806
807
808
809
810
811void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt,
812 u8 *proto, struct in6_addr **daddr_p);
813void ipv6_push_frag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt,
814 u8 *proto);
815
816int ipv6_skip_exthdr(const struct sk_buff *, int start, u8 *nexthdrp,
817 __be16 *frag_offp);
818
819bool ipv6_ext_hdr(u8 nexthdr);
820
821enum {
822 IP6_FH_F_FRAG = (1 << 0),
823 IP6_FH_F_AUTH = (1 << 1),
824 IP6_FH_F_SKIP_RH = (1 << 2),
825};
826
827
828int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, int target,
829 unsigned short *fragoff, int *fragflg);
830
831int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
832
833struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
834 const struct ipv6_txoptions *opt,
835 struct in6_addr *orig);
836
837
838
839
840
841int ipv6_setsockopt(struct sock *sk, int level, int optname,
842 char __user *optval, unsigned int optlen);
843int ipv6_getsockopt(struct sock *sk, int level, int optname,
844 char __user *optval, int __user *optlen);
845int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
846 char __user *optval, unsigned int optlen);
847int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
848 char __user *optval, int __user *optlen);
849
850int ip6_datagram_connect(struct sock *sk, struct sockaddr *addr, int addr_len);
851int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *addr,
852 int addr_len);
853
854int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len,
855 int *addr_len);
856int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len,
857 int *addr_len);
858void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
859 u32 info, u8 *payload);
860void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info);
861void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu);
862
863int inet6_release(struct socket *sock);
864int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len);
865int inet6_getname(struct socket *sock, struct sockaddr *uaddr, int *uaddr_len,
866 int peer);
867int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
868
869int inet6_hash_connect(struct inet_timewait_death_row *death_row,
870 struct sock *sk);
871
872
873
874
875extern const struct proto_ops inet6_stream_ops;
876extern const struct proto_ops inet6_dgram_ops;
877
878struct group_source_req;
879struct group_filter;
880
881int ip6_mc_source(int add, int omode, struct sock *sk,
882 struct group_source_req *pgsr);
883int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
884int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
885 struct group_filter __user *optval, int __user *optlen);
886
887#ifdef CONFIG_PROC_FS
888int ac6_proc_init(struct net *net);
889void ac6_proc_exit(struct net *net);
890int raw6_proc_init(void);
891void raw6_proc_exit(void);
892int tcp6_proc_init(struct net *net);
893void tcp6_proc_exit(struct net *net);
894int udp6_proc_init(struct net *net);
895void udp6_proc_exit(struct net *net);
896int udplite6_proc_init(void);
897void udplite6_proc_exit(void);
898int ipv6_misc_proc_init(void);
899void ipv6_misc_proc_exit(void);
900int snmp6_register_dev(struct inet6_dev *idev);
901int snmp6_unregister_dev(struct inet6_dev *idev);
902
903#else
904static inline int ac6_proc_init(struct net *net) { return 0; }
905static inline void ac6_proc_exit(struct net *net) { }
906static inline int snmp6_register_dev(struct inet6_dev *idev) { return 0; }
907static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
908#endif
909
910#ifdef CONFIG_SYSCTL
911extern struct ctl_table ipv6_route_table_template[];
912
913struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
914struct ctl_table *ipv6_route_sysctl_init(struct net *net);
915int ipv6_sysctl_register(void);
916void ipv6_sysctl_unregister(void);
917#endif
918
919#endif
920
