1#ifndef _IPV6_H
2#define _IPV6_H
3
4#include <linux/types.h>
5#include <linux/in6.h>
6#include <asm/byteorder.h>
7
8
9
10#define IPV6_MIN_MTU 1280
11
12
13
14
15
16
17
18
19struct in6_pktinfo {
20 struct in6_addr ipi6_addr;
21 int ipi6_ifindex;
22};
23
24
25struct in6_ifreq {
26 struct in6_addr ifr6_addr;
27 __u32 ifr6_prefixlen;
28 int ifr6_ifindex;
29};
30
31#define IPV6_SRCRT_STRICT 0x01
32#define IPV6_SRCRT_TYPE_0 0
33#define IPV6_SRCRT_TYPE_2 2
34
35
36
37
38struct ipv6_rt_hdr {
39 __u8 nexthdr;
40 __u8 hdrlen;
41 __u8 type;
42 __u8 segments_left;
43
44
45
46
47
48};
49
50
51struct ipv6_opt_hdr {
52 __u8 nexthdr;
53 __u8 hdrlen;
54
55
56
57} __attribute__ ((packed));
58
59#define ipv6_destopt_hdr ipv6_opt_hdr
60#define ipv6_hopopt_hdr ipv6_opt_hdr
61
62#ifdef __KERNEL__
63#define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
64#endif
65
66
67
68
69
70struct rt0_hdr {
71 struct ipv6_rt_hdr rt_hdr;
72 __u32 reserved;
73 struct in6_addr addr[0];
74
75#define rt0_type rt_hdr.type
76};
77
78
79
80
81
82struct rt2_hdr {
83 struct ipv6_rt_hdr rt_hdr;
84 __u32 reserved;
85 struct in6_addr addr;
86
87#define rt2_type rt_hdr.type
88};
89
90
91
92
93
94struct ipv6_destopt_hao {
95 __u8 type;
96 __u8 length;
97 struct in6_addr addr;
98} __attribute__ ((__packed__));
99
100
101
102
103
104
105
106
107struct ipv6hdr {
108#if defined(__LITTLE_ENDIAN_BITFIELD)
109 __u8 priority:4,
110 version:4;
111#elif defined(__BIG_ENDIAN_BITFIELD)
112 __u8 version:4,
113 priority:4;
114#else
115#error "Please fix <asm/byteorder.h>"
116#endif
117 __u8 flow_lbl[3];
118
119 __be16 payload_len;
120 __u8 nexthdr;
121 __u8 hop_limit;
122
123 struct in6_addr saddr;
124 struct in6_addr daddr;
125};
126
127#ifdef __KERNEL__
128
129
130
131struct ipv6_devconf {
132 __s32 forwarding;
133 __s32 hop_limit;
134 __s32 mtu6;
135 __s32 accept_ra;
136 __s32 accept_redirects;
137 __s32 autoconf;
138 __s32 dad_transmits;
139 __s32 rtr_solicits;
140 __s32 rtr_solicit_interval;
141 __s32 rtr_solicit_delay;
142 __s32 force_mld_version;
143#ifdef CONFIG_IPV6_PRIVACY
144 __s32 use_tempaddr;
145 __s32 temp_valid_lft;
146 __s32 temp_prefered_lft;
147 __s32 regen_max_retry;
148 __s32 max_desync_factor;
149#endif
150 __s32 max_addresses;
151 __s32 accept_ra_defrtr;
152 __s32 accept_ra_pinfo;
153#ifdef CONFIG_IPV6_ROUTER_PREF
154 __s32 accept_ra_rtr_pref;
155 __s32 rtr_probe_interval;
156#ifdef CONFIG_IPV6_ROUTE_INFO
157 __s32 accept_ra_rt_info_max_plen;
158#endif
159#endif
160 __s32 proxy_ndp;
161 __s32 accept_source_route;
162#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
163 __s32 optimistic_dad;
164#endif
165#ifdef CONFIG_IPV6_MROUTE
166 __s32 mc_forwarding;
167#endif
168 __s32 disable_ipv6;
169 __s32 accept_dad;
170 void *sysctl;
171};
172
173struct ipv6_params {
174 __s32 disable_ipv6;
175 __s32 autoconf;
176};
177extern struct ipv6_params ipv6_defaults;
178#endif
179
180
181enum {
182 DEVCONF_FORWARDING = 0,
183 DEVCONF_HOPLIMIT,
184 DEVCONF_MTU6,
185 DEVCONF_ACCEPT_RA,
186 DEVCONF_ACCEPT_REDIRECTS,
187 DEVCONF_AUTOCONF,
188 DEVCONF_DAD_TRANSMITS,
189 DEVCONF_RTR_SOLICITS,
190 DEVCONF_RTR_SOLICIT_INTERVAL,
191 DEVCONF_RTR_SOLICIT_DELAY,
192 DEVCONF_USE_TEMPADDR,
193 DEVCONF_TEMP_VALID_LFT,
194 DEVCONF_TEMP_PREFERED_LFT,
195 DEVCONF_REGEN_MAX_RETRY,
196 DEVCONF_MAX_DESYNC_FACTOR,
197 DEVCONF_MAX_ADDRESSES,
198 DEVCONF_FORCE_MLD_VERSION,
199 DEVCONF_ACCEPT_RA_DEFRTR,
200 DEVCONF_ACCEPT_RA_PINFO,
201 DEVCONF_ACCEPT_RA_RTR_PREF,
202 DEVCONF_RTR_PROBE_INTERVAL,
203 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
204 DEVCONF_PROXY_NDP,
205 DEVCONF_OPTIMISTIC_DAD,
206 DEVCONF_ACCEPT_SOURCE_ROUTE,
207 DEVCONF_MC_FORWARDING,
208 DEVCONF_DISABLE_IPV6,
209 DEVCONF_ACCEPT_DAD,
210 DEVCONF_MAX
211};
212
213#ifdef __KERNEL__
214#include <linux/icmpv6.h>
215#include <linux/tcp.h>
216#include <linux/udp.h>
217
218#include <net/inet_sock.h>
219
220static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
221{
222 return (struct ipv6hdr *)skb_network_header(skb);
223}
224
225static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
226{
227 return (struct ipv6hdr *)skb_transport_header(skb);
228}
229
230
231
232
233
234
235struct inet6_skb_parm {
236 int iif;
237 __u16 ra;
238 __u16 hop;
239 __u16 dst0;
240 __u16 srcrt;
241 __u16 dst1;
242 __u16 lastopt;
243 __u32 nhoff;
244 __u16 flags;
245#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
246 __u16 dsthao;
247#endif
248
249#define IP6SKB_XFRM_TRANSFORMED 1
250#define IP6SKB_FORWARDED 2
251};
252
253#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
254
255static inline int inet6_iif(const struct sk_buff *skb)
256{
257 return IP6CB(skb)->iif;
258}
259
260struct inet6_request_sock {
261 struct in6_addr loc_addr;
262 struct in6_addr rmt_addr;
263 struct sk_buff *pktopts;
264 int iif;
265};
266
267struct tcp6_request_sock {
268 struct tcp_request_sock tcp6rsk_tcp;
269 struct inet6_request_sock tcp6rsk_inet6;
270};
271
272struct ipv6_mc_socklist;
273struct ipv6_ac_socklist;
274struct ipv6_fl_socklist;
275
276
277
278
279
280
281
282
283
284struct ipv6_pinfo {
285 struct in6_addr saddr;
286 struct in6_addr rcv_saddr;
287 struct in6_addr daddr;
288 struct in6_pktinfo sticky_pktinfo;
289 struct in6_addr *daddr_cache;
290#ifdef CONFIG_IPV6_SUBTREES
291 struct in6_addr *saddr_cache;
292#endif
293
294 __be32 flow_label;
295 __u32 frag_size;
296
297
298
299
300
301#if defined(__BIG_ENDIAN_BITFIELD)
302 __s16 hop_limit:9;
303 __u16 __unused_1:7;
304#else
305 __u16 __unused_1:7;
306 __s16 hop_limit:9;
307#endif
308
309#if defined(__BIG_ENDIAN_BITFIELD)
310
311 __s16 mcast_hops:9;
312 __u16 __unused_2:6,
313 mc_loop:1;
314#else
315 __u16 mc_loop:1,
316 __unused_2:6;
317 __s16 mcast_hops:9;
318#endif
319 int mcast_oif;
320
321
322 union {
323 struct {
324 __u16 srcrt:1,
325 osrcrt:1,
326 rxinfo:1,
327 rxoinfo:1,
328 rxhlim:1,
329 rxohlim:1,
330 hopopts:1,
331 ohopopts:1,
332 dstopts:1,
333 odstopts:1,
334 rxflow:1,
335 rxtclass:1;
336 } bits;
337 __u16 all;
338 } rxopt;
339
340
341 __u8 recverr:1,
342 sndflow:1,
343 pmtudisc:2,
344 ipv6only:1,
345 srcprefs:3;
346
347
348
349 __u8 tclass;
350
351 __u32 dst_cookie;
352
353 struct ipv6_mc_socklist *ipv6_mc_list;
354 struct ipv6_ac_socklist *ipv6_ac_list;
355 struct ipv6_fl_socklist *ipv6_fl_list;
356
357 struct ipv6_txoptions *opt;
358 struct sk_buff *pktoptions;
359 struct {
360 struct ipv6_txoptions *opt;
361 u8 hop_limit;
362 u8 tclass;
363 } cork;
364};
365
366
367struct raw6_sock {
368
369 struct inet_sock inet;
370 __u32 checksum;
371 __u32 offset;
372 struct icmp6_filter filter;
373
374 struct ipv6_pinfo inet6;
375};
376
377struct udp6_sock {
378 struct udp_sock udp;
379
380 struct ipv6_pinfo inet6;
381};
382
383struct tcp6_sock {
384 struct tcp_sock tcp;
385
386 struct ipv6_pinfo inet6;
387};
388
389extern int inet6_sk_rebuild_header(struct sock *sk);
390
391#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
392static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
393{
394 return inet_sk(__sk)->pinet6;
395}
396
397static inline struct inet6_request_sock *
398 inet6_rsk(const struct request_sock *rsk)
399{
400 return (struct inet6_request_sock *)(((u8 *)rsk) +
401 inet_rsk(rsk)->inet6_rsk_offset);
402}
403
404static inline u32 inet6_rsk_offset(struct request_sock *rsk)
405{
406 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
407}
408
409static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
410{
411 struct request_sock *req = reqsk_alloc(ops);
412
413 if (req != NULL) {
414 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
415 inet6_rsk(req)->pktopts = NULL;
416 }
417
418 return req;
419}
420
421static inline struct raw6_sock *raw6_sk(const struct sock *sk)
422{
423 return (struct raw6_sock *)sk;
424}
425
426static inline void inet_sk_copy_descendant(struct sock *sk_to,
427 const struct sock *sk_from)
428{
429 int ancestor_size = sizeof(struct inet_sock);
430
431 if (sk_from->sk_family == PF_INET6)
432 ancestor_size += sizeof(struct ipv6_pinfo);
433
434 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
435}
436
437#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
438#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
439
440struct inet6_timewait_sock {
441 struct in6_addr tw_v6_daddr;
442 struct in6_addr tw_v6_rcv_saddr;
443};
444
445struct tcp6_timewait_sock {
446 struct tcp_timewait_sock tcp6tw_tcp;
447 struct inet6_timewait_sock tcp6tw_inet6;
448};
449
450static inline u16 inet6_tw_offset(const struct proto *prot)
451{
452 return prot->twsk_prot->twsk_obj_size -
453 sizeof(struct inet6_timewait_sock);
454}
455
456static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
457{
458 return (struct inet6_timewait_sock *)(((u8 *)sk) +
459 inet_twsk(sk)->tw_ipv6_offset);
460}
461
462static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
463{
464 return likely(sk->sk_state != TCP_TIME_WAIT) ?
465 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
466}
467
468static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
469{
470 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
471}
472
473static inline int inet_v6_ipv6only(const struct sock *sk)
474{
475 return likely(sk->sk_state != TCP_TIME_WAIT) ?
476 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
477}
478#else
479#define __ipv6_only_sock(sk) 0
480#define ipv6_only_sock(sk) 0
481
482static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
483{
484 return NULL;
485}
486
487static inline struct inet6_request_sock *
488 inet6_rsk(const struct request_sock *rsk)
489{
490 return NULL;
491}
492
493static inline struct raw6_sock *raw6_sk(const struct sock *sk)
494{
495 return NULL;
496}
497
498#define __inet6_rcv_saddr(__sk) NULL
499#define inet6_rcv_saddr(__sk) NULL
500#define tcp_twsk_ipv6only(__sk) 0
501#define inet_v6_ipv6only(__sk) 0
502#endif
503
504#define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\
505 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
506 ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports)) && \
507 ((__sk)->sk_family == AF_INET6) && \
508 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
509 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
510 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
511
512#define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \
513 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
514 (*((__portpair *)&(inet_twsk(__sk)->tw_dport)) == (__ports)) && \
515 ((__sk)->sk_family == PF_INET6) && \
516 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr))) && \
517 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr))) && \
518 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
519
520#endif
521
522#endif
523
