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[XFRM]: Fix protocol field value for outgoing IPv6 GSO packets
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / net / ipv6.h
CommitLineData
1da177e4
LT		 1/*
2 * Linux INET6 implementation
3 *
4 * Authors:
5 * Pedro Roque <roque@di.fc.ul.pt>
6 *
7 * $Id: ipv6.h,v 1.1 2002/05/20 15:13:07 jgrimm Exp $
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 */
14
15#ifndef _NET_IPV6_H
16#define _NET_IPV6_H
17
18#include <linux/ipv6.h>
19#include <linux/hardirq.h>
20#include <net/ndisc.h>
21#include <net/flow.h>
22#include <net/snmp.h>
23
24#define SIN6_LEN_RFC2133 24
25
26#define IPV6_MAXPLEN 65535
27
28/*
29 * NextHeader field of IPv6 header
30 */
31
32#define NEXTHDR_HOP 0 /* Hop-by-hop option header. */
33#define NEXTHDR_TCP 6 /* TCP segment. */
34#define NEXTHDR_UDP 17 /* UDP message. */
35#define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */
36#define NEXTHDR_ROUTING 43 /* Routing header. */
37#define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly 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
44#define NEXTHDR_MAX 255
45
46
47
48#define IPV6_DEFAULT_HOPLIMIT 64
49#define IPV6_DEFAULT_MCASTHOPS 1
50
51/*
52 * Addr type
53 *
54 * type - unicast | multicast
55 * scope - local | site | global
56 * v4 - compat
57 * v4mapped
58 * any
59 * loopback
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 /* reserved address space */
77
78/*
79 * Addr scopes
80 */
81#ifdef __KERNEL__
82#define IPV6_ADDR_MC_SCOPE(a) \
83 ((a)->s6_addr[1] & 0x0f) /* nonstandard */
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 * fragmentation header
94 */
95
96struct frag_hdr {
97 unsigned char nexthdr;
98 unsigned char reserved;
99 unsigned short frag_off;
100 __u32 identification;
101};
102
103#define IP6_MF 0x0001
104
105#ifdef __KERNEL__
106
107#include <net/sock.h>
108
109/* sysctls */
110extern int sysctl_ipv6_bindv6only;
111extern int sysctl_mld_max_msf;
112
113/* MIBs */
114DECLARE_SNMP_STAT(struct ipstats_mib, ipv6_statistics);
115#define IP6_INC_STATS(field) SNMP_INC_STATS(ipv6_statistics, field)
116#define IP6_INC_STATS_BH(field) SNMP_INC_STATS_BH(ipv6_statistics, field)
117#define IP6_INC_STATS_USER(field) SNMP_INC_STATS_USER(ipv6_statistics, field)
118DECLARE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics);
119#define ICMP6_INC_STATS(idev, field) ({ \
120 struct inet6_dev *_idev = (idev); \
121 if (likely(_idev != NULL)) \
122 SNMP_INC_STATS(idev->stats.icmpv6, field); \
123 SNMP_INC_STATS(icmpv6_statistics, field); \
124})
125#define ICMP6_INC_STATS_BH(idev, field) ({ \
126 struct inet6_dev *_idev = (idev); \
127 if (likely(_idev != NULL)) \
128 SNMP_INC_STATS_BH((_idev)->stats.icmpv6, field); \
129 SNMP_INC_STATS_BH(icmpv6_statistics, field); \
130})
131#define ICMP6_INC_STATS_USER(idev, field) ({ \
132 struct inet6_dev *_idev = (idev); \
133 if (likely(_idev != NULL)) \
134 SNMP_INC_STATS_USER(_idev->stats.icmpv6, field); \
135 SNMP_INC_STATS_USER(icmpv6_statistics, field); \
136})
137#define ICMP6_INC_STATS_OFFSET_BH(idev, field, offset) ({ \
138 struct inet6_dev *_idev = idev; \
139 __typeof__(offset) _offset = (offset); \
140 if (likely(_idev != NULL)) \
141 SNMP_INC_STATS_OFFSET_BH(_idev->stats.icmpv6, field, _offset); \
142 SNMP_INC_STATS_OFFSET_BH(icmpv6_statistics, field, _offset); \
143})
144DECLARE_SNMP_STAT(struct udp_mib, udp_stats_in6);
145#define UDP6_INC_STATS(field) SNMP_INC_STATS(udp_stats_in6, field)
146#define UDP6_INC_STATS_BH(field) SNMP_INC_STATS_BH(udp_stats_in6, field)
147#define UDP6_INC_STATS_USER(field) SNMP_INC_STATS_USER(udp_stats_in6, field)
1da177e4
LT		 148
149int snmp6_register_dev(struct inet6_dev *idev);
150int snmp6_unregister_dev(struct inet6_dev *idev);
151int snmp6_alloc_dev(struct inet6_dev *idev);
152int snmp6_free_dev(struct inet6_dev *idev);
153int snmp6_mib_init(void *ptr[2], size_t mibsize, size_t mibalign);
154void snmp6_mib_free(void *ptr[2]);
155
156struct ip6_ra_chain
157{
158 struct ip6_ra_chain *next;
159 struct sock *sk;
160 int sel;
161 void (*destructor)(struct sock *);
162};
163
164extern struct ip6_ra_chain *ip6_ra_chain;
165extern rwlock_t ip6_ra_lock;
166
167/*
168 This structure is prepared by protocol, when parsing
169 ancillary data and passed to IPv6.
170 */
171
172struct ipv6_txoptions
173{
174 /* Length of this structure */
175 int tot_len;
176
177 /* length of extension headers */
178
179 __u16 opt_flen; /* after fragment hdr */
180 __u16 opt_nflen; /* before fragment hdr */
181
182 struct ipv6_opt_hdr *hopopt;
183 struct ipv6_opt_hdr *dst0opt;
184 struct ipv6_rt_hdr *srcrt; /* Routing Header */
1da177e4
LT		 185 struct ipv6_opt_hdr *dst1opt;
186
187 /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
188};
189
190struct ip6_flowlabel
191{
192 struct ip6_flowlabel *next;
193 u32 label;
194 struct in6_addr dst;
195 struct ipv6_txoptions *opt;
196 atomic_t users;
197 unsigned long linger;
198 u8 share;
199 u32 owner;
200 unsigned long lastuse;
201 unsigned long expires;
202};
203
204#define IPV6_FLOWINFO_MASK __constant_htonl(0x0FFFFFFF)
205#define IPV6_FLOWLABEL_MASK __constant_htonl(0x000FFFFF)
206
207struct ipv6_fl_socklist
208{
209 struct ipv6_fl_socklist *next;
210 struct ip6_flowlabel *fl;
211};
212
213extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, u32 label);
214extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
215 struct ip6_flowlabel * fl,
216 struct ipv6_txoptions * fopt);
217extern void fl6_free_socklist(struct sock *sk);
218extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
219extern void ip6_flowlabel_init(void);
220extern void ip6_flowlabel_cleanup(void);
221
222static inline void fl6_sock_release(struct ip6_flowlabel *fl)
223{
224 if (fl)
225 atomic_dec(&fl->users);
226}
227
228extern int ip6_ra_control(struct sock *sk, int sel,
229 void (*destructor)(struct sock *));
230
231
b809739a 232extern int ipv6_parse_hopopts(struct sk_buff *skb);
1da177e4
LT		 233
234extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
333fad53
YH		 235extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
236 int newtype,
237 struct ipv6_opt_hdr __user *newopt,
238 int newoptlen);
df9890c3
YH		 239struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
240 struct ipv6_txoptions *opt);
1da177e4 241
399c07de
ACM		 242extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
243
1da177e4
LT		 244extern int ip6_frag_nqueues;
245extern atomic_t ip6_frag_mem;
246
247#define IPV6_FRAG_TIMEOUT (60*HZ) /* 60 seconds */
248
249/*
250 * Function prototype for build_xmit
251 */
252
253typedef int (*inet_getfrag_t) (const void *data,
254 struct in6_addr *addr,
255 char *,
256 unsigned int, unsigned int);
257
b1cacb68
YH		 258extern int __ipv6_addr_type(const struct in6_addr *addr);
259static inline int ipv6_addr_type(const struct in6_addr *addr)
260{
261 return __ipv6_addr_type(addr) & 0xffff;
262}
1da177e4
LT		 263
264static inline int ipv6_addr_scope(const struct in6_addr *addr)
265{
b1cacb68
YH		 266 return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
267}
268
269static inline int __ipv6_addr_src_scope(int type)
270{
271 return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
272}
273
274static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
275{
276 return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
1da177e4
LT		 277}
278
279static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
280{
281 return memcmp((const void *) a1, (const void *) a2, sizeof(struct in6_addr));
282}
283
f2ffd9ee
PM		 284static inline int
285ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
286 const struct in6_addr *a2)
287{
288 unsigned int i;
289
290 for (i = 0; i < 4; i++)
291 if ((a1->s6_addr32[i] ^ a2->s6_addr32[i]) & m->s6_addr32[i])
292 return 1;
293 return 0;
294}
295
1da177e4
LT		 296static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
297{
298 memcpy((void *) a1, (const void *) a2, sizeof(struct in6_addr));
299}
300
301static inline void ipv6_addr_prefix(struct in6_addr *pfx,
302 const struct in6_addr *addr,
303 int plen)
304{
305 /* caller must guarantee 0 <= plen <= 128 */
306 int o = plen >> 3,
307 b = plen & 0x7;
308
309 memcpy(pfx->s6_addr, addr, o);
310 if (b != 0) {
311 pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);
312 o++;
313 }
314 if (o < 16)
315 memset(pfx->s6_addr + o, 0, 16 - o);
316}
317
318#ifndef __HAVE_ARCH_ADDR_SET
319static inline void ipv6_addr_set(struct in6_addr *addr,
320 __u32 w1, __u32 w2,
321 __u32 w3, __u32 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#endif
329
330static inline int ipv6_addr_equal(const struct in6_addr *a1,
331 const struct in6_addr *a2)
332{
333 return (a1->s6_addr32[0] == a2->s6_addr32[0] &&
334 a1->s6_addr32[1] == a2->s6_addr32[1] &&
335 a1->s6_addr32[2] == a2->s6_addr32[2] &&
336 a1->s6_addr32[3] == a2->s6_addr32[3]);
337}
338
339static inline int __ipv6_prefix_equal(const u32 *a1, const u32 *a2,
340 unsigned int prefixlen)
341{
342 unsigned pdw, pbi;
343
344 /* check complete u32 in prefix */
345 pdw = prefixlen >> 5;
346 if (pdw && memcmp(a1, a2, pdw << 2))
347 return 0;
348
349 /* check incomplete u32 in prefix */
350 pbi = prefixlen & 0x1f;
351 if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
352 return 0;
353
354 return 1;
355}
356
357static inline int ipv6_prefix_equal(const struct in6_addr *a1,
358 const struct in6_addr *a2,
359 unsigned int prefixlen)
360{
361 return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
362 prefixlen);
363}
364
365static inline int ipv6_addr_any(const struct in6_addr *a)
366{
367 return ((a->s6_addr32[0] | a->s6_addr32[1] |
368 a->s6_addr32[2] | a->s6_addr32[3] ) == 0);
369}
370
971f359d
YH		 371/*
372 * find the first different bit between two addresses
373 * length of address must be a multiple of 32bits
374 */
375static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
376{
377 const __u32 *a1 = token1, *a2 = token2;
378 int i;
379
380 addrlen >>= 2;
381
382 for (i = 0; i < addrlen; i++) {
383 __u32 xb = a1[i] ^ a2[i];
384 if (xb) {
385 int j = 31;
386
387 xb = ntohl(xb);
388 while ((xb & (1 << j)) == 0)
389 j--;
390
391 return (i * 32 + 31 - j);
392 }
393 }
394
395 /*
396 * we should *never* get to this point since that
397 * would mean the addrs are equal
398 *
399 * However, we do get to it 8) And exacly, when
400 * addresses are equal 8)
401 *
402 * ip route add 1111::/128 via ...
403 * ip route add 1111::/64 via ...
404 * and we are here.
405 *
406 * Ideally, this function should stop comparison
407 * at prefix length. It does not, but it is still OK,
408 * if returned value is greater than prefix length.
409 * --ANK (980803)
410 */
411 return (addrlen << 5);
412}
413
414static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
415{
416 return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
417}
418
1da177e4
LT		 419/*
420 * Prototypes exported by ipv6
421 */
422
423/*
424 * rcv function (called from netdevice level)
425 */
426
427extern int ipv6_rcv(struct sk_buff *skb,
428 struct net_device *dev,
f2ccd8fa
DM		 429 struct packet_type *pt,
430 struct net_device *orig_dev);
1da177e4 431
b05e1066
PM		 432extern int ip6_rcv_finish(struct sk_buff *skb);
433
1da177e4
LT		 434/*
435 * upper-layer output functions
436 */
437extern int ip6_xmit(struct sock *sk,
438 struct sk_buff *skb,
439 struct flowi *fl,
440 struct ipv6_txoptions *opt,
441 int ipfragok);
442
443extern int ip6_nd_hdr(struct sock *sk,
444 struct sk_buff *skb,
445 struct net_device *dev,
446 struct in6_addr *saddr,
447 struct in6_addr *daddr,
448 int proto, int len);
449
450extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
451
452extern int ip6_append_data(struct sock *sk,
453 int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb),
454 void *from,
455 int length,
456 int transhdrlen,
457 int hlimit,
41a1f8ea 458 int tclass,
1da177e4
LT		 459 struct ipv6_txoptions *opt,
460 struct flowi *fl,
461 struct rt6_info *rt,
462 unsigned int flags);
463
464extern int ip6_push_pending_frames(struct sock *sk);
465
466extern void ip6_flush_pending_frames(struct sock *sk);
467
468extern int ip6_dst_lookup(struct sock *sk,
469 struct dst_entry **dst,
470 struct flowi *fl);
471
472/*
473 * skb processing functions
474 */
475
476extern int ip6_output(struct sk_buff *skb);
477extern int ip6_forward(struct sk_buff *skb);
478extern int ip6_input(struct sk_buff *skb);
479extern int ip6_mc_input(struct sk_buff *skb);
480
481/*
482 * Extension header (options) processing
483 */
484
485extern u8 * ipv6_build_nfrag_opts(struct sk_buff *skb,
486 u8 *prev_hdr,
487 struct ipv6_txoptions *opt,
488 struct in6_addr *daddr,
489 u32 jumbolen);
490extern u8 * ipv6_build_frag_opts(struct sk_buff *skb,
491 u8 *prev_hdr,
492 struct ipv6_txoptions *opt);
493extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
494 struct ipv6_txoptions *opt,
495 u8 *proto,
496 struct in6_addr **daddr_p);
497extern void ipv6_push_frag_opts(struct sk_buff *skb,
498 struct ipv6_txoptions *opt,
499 u8 *proto);
500
501extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
0d3d077c 502 u8 *nexthdrp);
1da177e4
LT		 503
504extern int ipv6_ext_hdr(u8 nexthdr);
505
506extern struct ipv6_txoptions * ipv6_invert_rthdr(struct sock *sk,
507 struct ipv6_rt_hdr *hdr);
508
509
510/*
511 * socket options (ipv6_sockglue.c)
512 */
513
514extern int ipv6_setsockopt(struct sock *sk, int level,
515 int optname,
516 char __user *optval,
517 int optlen);
518extern int ipv6_getsockopt(struct sock *sk, int level,
519 int optname,
520 char __user *optval,
521 int __user *optlen);
3fdadf7d
DM		 522extern int compat_ipv6_setsockopt(struct sock *sk,
523 int level,
524 int optname,
525 char __user *optval,
526 int optlen);
527extern int compat_ipv6_getsockopt(struct sock *sk,
528 int level,
529 int optname,
530 char __user *optval,
531 int __user *optlen);
1da177e4
LT		 532
533extern void ipv6_packet_init(void);
534
535extern void ipv6_packet_cleanup(void);
536
537extern int ip6_datagram_connect(struct sock *sk,
538 struct sockaddr *addr, int addr_len);
539
540extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
541extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, u16 port,
542 u32 info, u8 *payload);
543extern void ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
544
545extern int inet6_release(struct socket *sock);
546extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
547 int addr_len);
548extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
549 int *uaddr_len, int peer);
550extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
551 unsigned long arg);
552
d8313f5c
ACM		 553extern int inet6_hash_connect(struct inet_timewait_death_row *death_row,
554 struct sock *sk);
555
1da177e4
LT		 556/*
557 * reassembly.c
558 */
559extern int sysctl_ip6frag_high_thresh;
560extern int sysctl_ip6frag_low_thresh;
561extern int sysctl_ip6frag_time;
562extern int sysctl_ip6frag_secret_interval;
563
90ddc4f0
ED		 564extern const struct proto_ops inet6_stream_ops;
565extern const struct proto_ops inet6_dgram_ops;
20380731 566
14c85021
ACM		 567struct group_source_req;
568struct group_filter;
569
20380731
ACM		 570extern int ip6_mc_source(int add, int omode, struct sock *sk,
571 struct group_source_req *pgsr);
572extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
573extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
574 struct group_filter __user *optval,
575 int __user *optlen);
576
577#ifdef CONFIG_PROC_FS
578extern int ac6_proc_init(void);
579extern void ac6_proc_exit(void);
580extern int raw6_proc_init(void);
581extern void raw6_proc_exit(void);
582extern int tcp6_proc_init(void);
583extern void tcp6_proc_exit(void);
584extern int udp6_proc_init(void);
585extern void udp6_proc_exit(void);
586extern int ipv6_misc_proc_init(void);
587extern void ipv6_misc_proc_exit(void);
588
589extern struct rt6_statistics rt6_stats;
590#endif
1da177e4 591
20380731
ACM		 592#ifdef CONFIG_SYSCTL
593extern ctl_table ipv6_route_table[];
594extern ctl_table ipv6_icmp_table[];
1da177e4 595
20380731
ACM		 596extern void ipv6_sysctl_register(void);
597extern void ipv6_sysctl_unregister(void);
598#endif
1da177e4 599
20380731
ACM		 600#endif /* __KERNEL__ */
601#endif /* _NET_IPV6_H */
kernel source for telekom puls (alcatel/mediatek)