2 * Linux INET6 implementation
5 * Pedro Roque <roque@di.fc.ul.pt>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
16 #include <linux/ipv6.h>
17 #include <linux/hardirq.h>
18 #include <net/if_inet6.h>
19 #include <net/ndisc.h>
23 #define SIN6_LEN_RFC2133 24
25 #define IPV6_MAXPLEN 65535
28 * NextHeader field of IPv6 header
31 #define NEXTHDR_HOP 0 /* Hop-by-hop option header. */
32 #define NEXTHDR_TCP 6 /* TCP segment. */
33 #define NEXTHDR_UDP 17 /* UDP message. */
34 #define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */
35 #define NEXTHDR_ROUTING 43 /* Routing header. */
36 #define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */
37 #define NEXTHDR_GRE 47 /* GRE header. */
38 #define NEXTHDR_ESP 50 /* Encapsulating security payload. */
39 #define NEXTHDR_AUTH 51 /* Authentication header. */
40 #define NEXTHDR_ICMP 58 /* ICMP for IPv6. */
41 #define NEXTHDR_NONE 59 /* No next header */
42 #define NEXTHDR_DEST 60 /* Destination options header. */
43 #define NEXTHDR_MOBILITY 135 /* Mobility header. */
45 #define NEXTHDR_MAX 255
49 #define IPV6_DEFAULT_HOPLIMIT 64
50 #define IPV6_DEFAULT_MCASTHOPS 1
55 * type - unicast | multicast
56 * scope - local | site | global
63 #define IPV6_ADDR_ANY 0x0000U
65 #define IPV6_ADDR_UNICAST 0x0001U
66 #define IPV6_ADDR_MULTICAST 0x0002U
68 #define IPV6_ADDR_LOOPBACK 0x0010U
69 #define IPV6_ADDR_LINKLOCAL 0x0020U
70 #define IPV6_ADDR_SITELOCAL 0x0040U
72 #define IPV6_ADDR_COMPATv4 0x0080U
74 #define IPV6_ADDR_SCOPE_MASK 0x00f0U
76 #define IPV6_ADDR_MAPPED 0x1000U
81 #define IPV6_ADDR_MC_SCOPE(a) \
82 ((a)->s6_addr[1] & 0x0f) /* nonstandard */
83 #define __IPV6_ADDR_SCOPE_INVALID -1
84 #define IPV6_ADDR_SCOPE_NODELOCAL 0x01
85 #define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
86 #define IPV6_ADDR_SCOPE_SITELOCAL 0x05
87 #define IPV6_ADDR_SCOPE_ORGLOCAL 0x08
88 #define IPV6_ADDR_SCOPE_GLOBAL 0x0e
93 #define IPV6_ADDR_MC_FLAG_TRANSIENT(a) \
94 ((a)->s6_addr[1] & 0x10)
95 #define IPV6_ADDR_MC_FLAG_PREFIX(a) \
96 ((a)->s6_addr[1] & 0x20)
97 #define IPV6_ADDR_MC_FLAG_RENDEZVOUS(a) \
98 ((a)->s6_addr[1] & 0x40)
101 * fragmentation header
108 __be32 identification
;
111 #define IP6_MF 0x0001
113 #include <net/sock.h>
116 extern int sysctl_mld_max_msf
;
118 #define _DEVINC(net, statname, modifier, idev, field) \
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));\
126 /* per device counters are atomic_long_t */
127 #define _DEVINCATOMIC(net, statname, modifier, idev, field) \
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));\
135 /* per device and per net counters are atomic_long_t */
136 #define _DEVINC_ATOMIC_ATOMIC(net, statname, idev, field) \
138 struct inet6_dev *_idev = (idev); \
139 if (likely(_idev != NULL)) \
140 SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
141 SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\
144 #define _DEVADD(net, statname, modifier, idev, field, val) \
146 struct inet6_dev *_idev = (idev); \
147 if (likely(_idev != NULL)) \
148 SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \
149 SNMP_ADD_STATS##modifier((net)->mib.statname##_statistics, (field), (val));\
152 #define _DEVUPD(net, statname, modifier, idev, field, val) \
154 struct inet6_dev *_idev = (idev); \
155 if (likely(_idev != NULL)) \
156 SNMP_UPD_PO_STATS##modifier((_idev)->stats.statname, field, (val)); \
157 SNMP_UPD_PO_STATS##modifier((net)->mib.statname##_statistics, field, (val));\
162 #define IP6_INC_STATS(net, idev,field) \
163 _DEVINC(net, ipv6, 64, idev, field)
164 #define IP6_INC_STATS_BH(net, idev,field) \
165 _DEVINC(net, ipv6, 64_BH, idev, field)
166 #define IP6_ADD_STATS(net, idev,field,val) \
167 _DEVADD(net, ipv6, 64, idev, field, val)
168 #define IP6_ADD_STATS_BH(net, idev,field,val) \
169 _DEVADD(net, ipv6, 64_BH, idev, field, val)
170 #define IP6_UPD_PO_STATS(net, idev,field,val) \
171 _DEVUPD(net, ipv6, 64, idev, field, val)
172 #define IP6_UPD_PO_STATS_BH(net, idev,field,val) \
173 _DEVUPD(net, ipv6, 64_BH, idev, field, val)
174 #define ICMP6_INC_STATS(net, idev, field) \
175 _DEVINCATOMIC(net, icmpv6, , idev, field)
176 #define ICMP6_INC_STATS_BH(net, idev, field) \
177 _DEVINCATOMIC(net, icmpv6, _BH, idev, field)
179 #define ICMP6MSGOUT_INC_STATS(net, idev, field) \
180 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
181 #define ICMP6MSGOUT_INC_STATS_BH(net, idev, field) \
182 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field +256)
183 #define ICMP6MSGIN_INC_STATS_BH(net, idev, field) \
184 _DEVINC_ATOMIC_ATOMIC(net, icmpv6msg, idev, field)
186 struct ip6_ra_chain
{
187 struct ip6_ra_chain
*next
;
190 void (*destructor
)(struct sock
*);
193 extern struct ip6_ra_chain
*ip6_ra_chain
;
194 extern rwlock_t ip6_ra_lock
;
197 This structure is prepared by protocol, when parsing
198 ancillary data and passed to IPv6.
201 struct ipv6_txoptions
{
202 /* Length of this structure */
205 /* length of extension headers */
207 __u16 opt_flen
; /* after fragment hdr */
208 __u16 opt_nflen
; /* before fragment hdr */
210 struct ipv6_opt_hdr
*hopopt
;
211 struct ipv6_opt_hdr
*dst0opt
;
212 struct ipv6_rt_hdr
*srcrt
; /* Routing Header */
213 struct ipv6_opt_hdr
*dst1opt
;
215 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
218 struct ip6_flowlabel
{
219 struct ip6_flowlabel
*next
;
223 struct ipv6_txoptions
*opt
;
224 unsigned long linger
;
230 unsigned long lastuse
;
231 unsigned long expires
;
235 #define IPV6_FLOWINFO_MASK cpu_to_be32(0x0FFFFFFF)
236 #define IPV6_FLOWLABEL_MASK cpu_to_be32(0x000FFFFF)
238 struct ipv6_fl_socklist
{
239 struct ipv6_fl_socklist
*next
;
240 struct ip6_flowlabel
*fl
;
243 extern struct ip6_flowlabel
*fl6_sock_lookup(struct sock
*sk
, __be32 label
);
244 extern struct ipv6_txoptions
*fl6_merge_options(struct ipv6_txoptions
* opt_space
,
245 struct ip6_flowlabel
* fl
,
246 struct ipv6_txoptions
* fopt
);
247 extern void fl6_free_socklist(struct sock
*sk
);
248 extern int ipv6_flowlabel_opt(struct sock
*sk
, char __user
*optval
, int optlen
);
249 extern int ip6_flowlabel_init(void);
250 extern void ip6_flowlabel_cleanup(void);
252 static inline void fl6_sock_release(struct ip6_flowlabel
*fl
)
255 atomic_dec(&fl
->users
);
258 extern void icmpv6_notify(struct sk_buff
*skb
, u8 type
, u8 code
, __be32 info
);
260 extern int ip6_ra_control(struct sock
*sk
, int sel
);
262 extern int ipv6_parse_hopopts(struct sk_buff
*skb
);
264 extern struct ipv6_txoptions
* ipv6_dup_options(struct sock
*sk
, struct ipv6_txoptions
*opt
);
265 extern struct ipv6_txoptions
* ipv6_renew_options(struct sock
*sk
, struct ipv6_txoptions
*opt
,
267 struct ipv6_opt_hdr __user
*newopt
,
269 struct ipv6_txoptions
*ipv6_fixup_options(struct ipv6_txoptions
*opt_space
,
270 struct ipv6_txoptions
*opt
);
272 extern bool ipv6_opt_accepted(const struct sock
*sk
, const struct sk_buff
*skb
);
274 static inline bool ipv6_accept_ra(struct inet6_dev
*idev
)
276 /* If forwarding is enabled, RA are not accepted unless the special
277 * hybrid mode (accept_ra=2) is enabled.
279 return idev
->cnf
.forwarding
? idev
->cnf
.accept_ra
== 2 :
283 #if IS_ENABLED(CONFIG_IPV6)
284 static inline int ip6_frag_nqueues(struct net
*net
)
286 return net
->ipv6
.frags
.nqueues
;
289 static inline int ip6_frag_mem(struct net
*net
)
291 return atomic_read(&net
->ipv6
.frags
.mem
);
295 #define IPV6_FRAG_HIGH_THRESH (256 * 1024) /* 262144 */
296 #define IPV6_FRAG_LOW_THRESH (192 * 1024) /* 196608 */
297 #define IPV6_FRAG_TIMEOUT (60 * HZ) /* 60 seconds */
299 extern int __ipv6_addr_type(const struct in6_addr
*addr
);
300 static inline int ipv6_addr_type(const struct in6_addr
*addr
)
302 return __ipv6_addr_type(addr
) & 0xffff;
305 static inline int ipv6_addr_scope(const struct in6_addr
*addr
)
307 return __ipv6_addr_type(addr
) & IPV6_ADDR_SCOPE_MASK
;
310 static inline int __ipv6_addr_src_scope(int type
)
312 return (type
== IPV6_ADDR_ANY
) ? __IPV6_ADDR_SCOPE_INVALID
: (type
>> 16);
315 static inline int ipv6_addr_src_scope(const struct in6_addr
*addr
)
317 return __ipv6_addr_src_scope(__ipv6_addr_type(addr
));
320 static inline int ipv6_addr_cmp(const struct in6_addr
*a1
, const struct in6_addr
*a2
)
322 return memcmp(a1
, a2
, sizeof(struct in6_addr
));
326 ipv6_masked_addr_cmp(const struct in6_addr
*a1
, const struct in6_addr
*m
,
327 const struct in6_addr
*a2
)
329 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
330 const unsigned long *ul1
= (const unsigned long *)a1
;
331 const unsigned long *ulm
= (const unsigned long *)m
;
332 const unsigned long *ul2
= (const unsigned long *)a2
;
334 return !!(((ul1
[0] ^ ul2
[0]) & ulm
[0]) |
335 ((ul1
[1] ^ ul2
[1]) & ulm
[1]));
337 return !!(((a1
->s6_addr32
[0] ^ a2
->s6_addr32
[0]) & m
->s6_addr32
[0]) |
338 ((a1
->s6_addr32
[1] ^ a2
->s6_addr32
[1]) & m
->s6_addr32
[1]) |
339 ((a1
->s6_addr32
[2] ^ a2
->s6_addr32
[2]) & m
->s6_addr32
[2]) |
340 ((a1
->s6_addr32
[3] ^ a2
->s6_addr32
[3]) & m
->s6_addr32
[3]));
344 static inline void ipv6_addr_prefix(struct in6_addr
*pfx
,
345 const struct in6_addr
*addr
,
348 /* caller must guarantee 0 <= plen <= 128 */
352 memset(pfx
->s6_addr
, 0, sizeof(pfx
->s6_addr
));
353 memcpy(pfx
->s6_addr
, addr
, o
);
355 pfx
->s6_addr
[o
] = addr
->s6_addr
[o
] & (0xff00 >> b
);
358 static inline void __ipv6_addr_set_half(__be32
*addr
,
359 __be32 wh
, __be32 wl
)
361 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
362 #if defined(__BIG_ENDIAN)
363 if (__builtin_constant_p(wh
) && __builtin_constant_p(wl
)) {
364 *(__force u64
*)addr
= ((__force u64
)(wh
) << 32 | (__force u64
)(wl
));
367 #elif defined(__LITTLE_ENDIAN)
368 if (__builtin_constant_p(wl
) && __builtin_constant_p(wh
)) {
369 *(__force u64
*)addr
= ((__force u64
)(wl
) << 32 | (__force u64
)(wh
));
378 static inline void ipv6_addr_set(struct in6_addr
*addr
,
379 __be32 w1
, __be32 w2
,
380 __be32 w3
, __be32 w4
)
382 __ipv6_addr_set_half(&addr
->s6_addr32
[0], w1
, w2
);
383 __ipv6_addr_set_half(&addr
->s6_addr32
[2], w3
, w4
);
386 static inline bool ipv6_addr_equal(const struct in6_addr
*a1
,
387 const struct in6_addr
*a2
)
389 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
390 const unsigned long *ul1
= (const unsigned long *)a1
;
391 const unsigned long *ul2
= (const unsigned long *)a2
;
393 return ((ul1
[0] ^ ul2
[0]) | (ul1
[1] ^ ul2
[1])) == 0UL;
395 return ((a1
->s6_addr32
[0] ^ a2
->s6_addr32
[0]) |
396 (a1
->s6_addr32
[1] ^ a2
->s6_addr32
[1]) |
397 (a1
->s6_addr32
[2] ^ a2
->s6_addr32
[2]) |
398 (a1
->s6_addr32
[3] ^ a2
->s6_addr32
[3])) == 0;
402 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
403 static inline bool __ipv6_prefix_equal64_half(const __be64
*a1
,
407 if (len
&& ((*a1
^ *a2
) & cpu_to_be64(~0UL) << (64 - len
)))
412 static inline bool ipv6_prefix_equal(const struct in6_addr
*addr1
,
413 const struct in6_addr
*addr2
,
414 unsigned int prefixlen
)
416 const __be64
*a1
= (const __be64
*)addr1
;
417 const __be64
*a2
= (const __be64
*)addr2
;
419 if (prefixlen
>= 64) {
422 return __ipv6_prefix_equal64_half(a1
+ 1, a2
+ 1, prefixlen
- 64);
424 return __ipv6_prefix_equal64_half(a1
, a2
, prefixlen
);
427 static inline bool ipv6_prefix_equal(const struct in6_addr
*addr1
,
428 const struct in6_addr
*addr2
,
429 unsigned int prefixlen
)
431 const __be32
*a1
= addr1
->s6_addr32
;
432 const __be32
*a2
= addr2
->s6_addr32
;
433 unsigned int pdw
, pbi
;
435 /* check complete u32 in prefix */
436 pdw
= prefixlen
>> 5;
437 if (pdw
&& memcmp(a1
, a2
, pdw
<< 2))
440 /* check incomplete u32 in prefix */
441 pbi
= prefixlen
& 0x1f;
442 if (pbi
&& ((a1
[pdw
] ^ a2
[pdw
]) & htonl((0xffffffff) << (32 - pbi
))))
449 struct inet_frag_queue
;
451 enum ip6_defrag_users
{
452 IP6_DEFRAG_LOCAL_DELIVER
,
453 IP6_DEFRAG_CONNTRACK_IN
,
454 __IP6_DEFRAG_CONNTRACK_IN
= IP6_DEFRAG_CONNTRACK_IN
+ USHRT_MAX
,
455 IP6_DEFRAG_CONNTRACK_OUT
,
456 __IP6_DEFRAG_CONNTRACK_OUT
= IP6_DEFRAG_CONNTRACK_OUT
+ USHRT_MAX
,
457 IP6_DEFRAG_CONNTRACK_BRIDGE_IN
,
458 __IP6_DEFRAG_CONNTRACK_BRIDGE_IN
= IP6_DEFRAG_CONNTRACK_BRIDGE_IN
+ USHRT_MAX
,
461 struct ip6_create_arg
{
464 const struct in6_addr
*src
;
465 const struct in6_addr
*dst
;
468 void ip6_frag_init(struct inet_frag_queue
*q
, void *a
);
469 bool ip6_frag_match(struct inet_frag_queue
*q
, void *a
);
472 * Equivalent of ipv4 struct ip
475 struct inet_frag_queue q
;
477 __be32 id
; /* fragment id */
479 struct in6_addr saddr
;
480 struct in6_addr daddr
;
487 void ip6_expire_frag_queue(struct net
*net
, struct frag_queue
*fq
,
488 struct inet_frags
*frags
);
490 static inline bool ipv6_addr_any(const struct in6_addr
*a
)
492 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
493 const unsigned long *ul
= (const unsigned long *)a
;
495 return (ul
[0] | ul
[1]) == 0UL;
497 return (a
->s6_addr32
[0] | a
->s6_addr32
[1] |
498 a
->s6_addr32
[2] | a
->s6_addr32
[3]) == 0;
502 static inline u32
ipv6_addr_hash(const struct in6_addr
*a
)
504 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
505 const unsigned long *ul
= (const unsigned long *)a
;
506 unsigned long x
= ul
[0] ^ ul
[1];
508 return (u32
)(x
^ (x
>> 32));
510 return (__force u32
)(a
->s6_addr32
[0] ^ a
->s6_addr32
[1] ^
511 a
->s6_addr32
[2] ^ a
->s6_addr32
[3]);
515 static inline bool ipv6_addr_loopback(const struct in6_addr
*a
)
517 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
518 const unsigned long *ul
= (const unsigned long *)a
;
520 return (ul
[0] | (ul
[1] ^ cpu_to_be64(1))) == 0UL;
522 return (a
->s6_addr32
[0] | a
->s6_addr32
[1] |
523 a
->s6_addr32
[2] | (a
->s6_addr32
[3] ^ htonl(1))) == 0;
527 static inline bool ipv6_addr_v4mapped(const struct in6_addr
*a
)
530 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
533 (a
->s6_addr32
[0] | a
->s6_addr32
[1]) |
535 (a
->s6_addr32
[2] ^ htonl(0x0000ffff))) == 0UL;
539 * Check for a RFC 4843 ORCHID address
540 * (Overlay Routable Cryptographic Hash Identifiers)
542 static inline bool ipv6_addr_orchid(const struct in6_addr
*a
)
544 return (a
->s6_addr32
[0] & htonl(0xfffffff0)) == htonl(0x20010010);
547 static inline void ipv6_addr_set_v4mapped(const __be32 addr
,
548 struct in6_addr
*v4mapped
)
550 ipv6_addr_set(v4mapped
,
557 * find the first different bit between two addresses
558 * length of address must be a multiple of 32bits
560 static inline int __ipv6_addr_diff32(const void *token1
, const void *token2
, int addrlen
)
562 const __be32
*a1
= token1
, *a2
= token2
;
567 for (i
= 0; i
< addrlen
; i
++) {
568 __be32 xb
= a1
[i
] ^ a2
[i
];
570 return i
* 32 + 31 - __fls(ntohl(xb
));
574 * we should *never* get to this point since that
575 * would mean the addrs are equal
577 * However, we do get to it 8) And exacly, when
578 * addresses are equal 8)
580 * ip route add 1111::/128 via ...
581 * ip route add 1111::/64 via ...
584 * Ideally, this function should stop comparison
585 * at prefix length. It does not, but it is still OK,
586 * if returned value is greater than prefix length.
592 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
593 static inline int __ipv6_addr_diff64(const void *token1
, const void *token2
, int addrlen
)
595 const __be64
*a1
= token1
, *a2
= token2
;
600 for (i
= 0; i
< addrlen
; i
++) {
601 __be64 xb
= a1
[i
] ^ a2
[i
];
603 return i
* 64 + 63 - __fls(be64_to_cpu(xb
));
610 static inline int __ipv6_addr_diff(const void *token1
, const void *token2
, int addrlen
)
612 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
613 if (__builtin_constant_p(addrlen
) && !(addrlen
& 7))
614 return __ipv6_addr_diff64(token1
, token2
, addrlen
);
616 return __ipv6_addr_diff32(token1
, token2
, addrlen
);
619 static inline int ipv6_addr_diff(const struct in6_addr
*a1
, const struct in6_addr
*a2
)
621 return __ipv6_addr_diff(a1
, a2
, sizeof(struct in6_addr
));
624 extern void ipv6_select_ident(struct frag_hdr
*fhdr
, struct rt6_info
*rt
);
627 * Header manipulation
629 static inline void ip6_flow_hdr(struct ipv6hdr
*hdr
, unsigned int tclass
,
632 *(__be32
*)hdr
= ntohl(0x60000000 | (tclass
<< 20)) | flowlabel
;
635 static inline __be32
ip6_flowinfo(const struct ipv6hdr
*hdr
)
637 return *(__be32
*)hdr
& IPV6_FLOWINFO_MASK
;
641 * Prototypes exported by ipv6
645 * rcv function (called from netdevice level)
648 extern int ipv6_rcv(struct sk_buff
*skb
,
649 struct net_device
*dev
,
650 struct packet_type
*pt
,
651 struct net_device
*orig_dev
);
653 extern int ip6_rcv_finish(struct sk_buff
*skb
);
656 * upper-layer output functions
658 extern int ip6_xmit(struct sock
*sk
,
661 struct ipv6_txoptions
*opt
,
664 extern int ip6_nd_hdr(struct sock
*sk
,
666 struct net_device
*dev
,
667 const struct in6_addr
*saddr
,
668 const struct in6_addr
*daddr
,
671 extern int ip6_find_1stfragopt(struct sk_buff
*skb
, u8
**nexthdr
);
673 extern int ip6_append_data(struct sock
*sk
,
674 int getfrag(void *from
, char *to
, int offset
, int len
, int odd
, struct sk_buff
*skb
),
680 struct ipv6_txoptions
*opt
,
686 extern int ip6_push_pending_frames(struct sock
*sk
);
688 extern void ip6_flush_pending_frames(struct sock
*sk
);
690 extern int ip6_dst_lookup(struct sock
*sk
,
691 struct dst_entry
**dst
,
693 extern struct dst_entry
* ip6_dst_lookup_flow(struct sock
*sk
,
695 const struct in6_addr
*final_dst
,
697 extern struct dst_entry
* ip6_sk_dst_lookup_flow(struct sock
*sk
,
699 const struct in6_addr
*final_dst
,
701 extern struct dst_entry
* ip6_blackhole_route(struct net
*net
,
702 struct dst_entry
*orig_dst
);
705 * skb processing functions
708 extern int ip6_output(struct sk_buff
*skb
);
709 extern int ip6_forward(struct sk_buff
*skb
);
710 extern int ip6_input(struct sk_buff
*skb
);
711 extern int ip6_mc_input(struct sk_buff
*skb
);
713 extern int __ip6_local_out(struct sk_buff
*skb
);
714 extern int ip6_local_out(struct sk_buff
*skb
);
717 * Extension header (options) processing
720 extern void ipv6_push_nfrag_opts(struct sk_buff
*skb
,
721 struct ipv6_txoptions
*opt
,
723 struct in6_addr
**daddr_p
);
724 extern void ipv6_push_frag_opts(struct sk_buff
*skb
,
725 struct ipv6_txoptions
*opt
,
728 extern int ipv6_skip_exthdr(const struct sk_buff
*, int start
,
729 u8
*nexthdrp
, __be16
*frag_offp
);
731 extern bool ipv6_ext_hdr(u8 nexthdr
);
734 IP6_FH_F_FRAG
= (1 << 0),
735 IP6_FH_F_AUTH
= (1 << 1),
736 IP6_FH_F_SKIP_RH
= (1 << 2),
739 /* find specified header and get offset to it */
740 extern int ipv6_find_hdr(const struct sk_buff
*skb
, unsigned int *offset
,
741 int target
, unsigned short *fragoff
, int *fragflg
);
743 extern int ipv6_find_tlv(struct sk_buff
*skb
, int offset
, int type
);
745 extern struct in6_addr
*fl6_update_dst(struct flowi6
*fl6
,
746 const struct ipv6_txoptions
*opt
,
747 struct in6_addr
*orig
);
750 * socket options (ipv6_sockglue.c)
753 extern int ipv6_setsockopt(struct sock
*sk
, int level
,
756 unsigned int optlen
);
757 extern int ipv6_getsockopt(struct sock
*sk
, int level
,
761 extern int compat_ipv6_setsockopt(struct sock
*sk
,
765 unsigned int optlen
);
766 extern int compat_ipv6_getsockopt(struct sock
*sk
,
772 extern int ip6_datagram_connect(struct sock
*sk
,
773 struct sockaddr
*addr
, int addr_len
);
775 extern int ipv6_recv_error(struct sock
*sk
, struct msghdr
*msg
, int len
);
776 extern int ipv6_recv_rxpmtu(struct sock
*sk
, struct msghdr
*msg
, int len
);
777 extern void ipv6_icmp_error(struct sock
*sk
, struct sk_buff
*skb
, int err
, __be16 port
,
778 u32 info
, u8
*payload
);
779 extern void ipv6_local_error(struct sock
*sk
, int err
, struct flowi6
*fl6
, u32 info
);
780 extern void ipv6_local_rxpmtu(struct sock
*sk
, struct flowi6
*fl6
, u32 mtu
);
782 extern int inet6_release(struct socket
*sock
);
783 extern int inet6_bind(struct socket
*sock
, struct sockaddr
*uaddr
,
785 extern int inet6_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
786 int *uaddr_len
, int peer
);
787 extern int inet6_ioctl(struct socket
*sock
, unsigned int cmd
,
790 extern int inet6_hash_connect(struct inet_timewait_death_row
*death_row
,
796 extern const struct proto_ops inet6_stream_ops
;
797 extern const struct proto_ops inet6_dgram_ops
;
799 struct group_source_req
;
802 extern int ip6_mc_source(int add
, int omode
, struct sock
*sk
,
803 struct group_source_req
*pgsr
);
804 extern int ip6_mc_msfilter(struct sock
*sk
, struct group_filter
*gsf
);
805 extern int ip6_mc_msfget(struct sock
*sk
, struct group_filter
*gsf
,
806 struct group_filter __user
*optval
,
808 extern unsigned int inet6_hash_frag(__be32 id
, const struct in6_addr
*saddr
,
809 const struct in6_addr
*daddr
, u32 rnd
);
811 #ifdef CONFIG_PROC_FS
812 extern int ac6_proc_init(struct net
*net
);
813 extern void ac6_proc_exit(struct net
*net
);
814 extern int raw6_proc_init(void);
815 extern void raw6_proc_exit(void);
816 extern int tcp6_proc_init(struct net
*net
);
817 extern void tcp6_proc_exit(struct net
*net
);
818 extern int udp6_proc_init(struct net
*net
);
819 extern void udp6_proc_exit(struct net
*net
);
820 extern int udplite6_proc_init(void);
821 extern void udplite6_proc_exit(void);
822 extern int ipv6_misc_proc_init(void);
823 extern void ipv6_misc_proc_exit(void);
824 extern int snmp6_register_dev(struct inet6_dev
*idev
);
825 extern int snmp6_unregister_dev(struct inet6_dev
*idev
);
828 static inline int ac6_proc_init(struct net
*net
) { return 0; }
829 static inline void ac6_proc_exit(struct net
*net
) { }
830 static inline int snmp6_register_dev(struct inet6_dev
*idev
) { return 0; }
831 static inline int snmp6_unregister_dev(struct inet6_dev
*idev
) { return 0; }
835 extern ctl_table ipv6_route_table_template
[];
836 extern ctl_table ipv6_icmp_table_template
[];
838 extern struct ctl_table
*ipv6_icmp_sysctl_init(struct net
*net
);
839 extern struct ctl_table
*ipv6_route_sysctl_init(struct net
*net
);
840 extern int ipv6_sysctl_register(void);
841 extern void ipv6_sysctl_unregister(void);
844 #endif /* _NET_IPV6_H */