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
24struct ip6_mtuinfo {
25 struct sockaddr_in6 ip6m_addr;
26 __u32 ip6m_mtu;
27};
28
29struct in6_ifreq {
30 struct in6_addr ifr6_addr;
31 __u32 ifr6_prefixlen;
32 int ifr6_ifindex;
33};
34
35#define IPV6_SRCRT_STRICT 0x01
36#define IPV6_SRCRT_TYPE_0 0
37#define IPV6_SRCRT_TYPE_2 2
38
39
40
41
42struct ipv6_rt_hdr {
43 __u8 nexthdr;
44 __u8 hdrlen;
45 __u8 type;
46 __u8 segments_left;
47
48
49
50
51
52};
53
54
55struct ipv6_opt_hdr {
56 __u8 nexthdr;
57 __u8 hdrlen;
58
59
60
61} __attribute__((packed));
62
63#define ipv6_destopt_hdr ipv6_opt_hdr
64#define ipv6_hopopt_hdr ipv6_opt_hdr
65
66#ifdef __KERNEL__
67#define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
68#endif
69
70
71
72
73
74struct rt0_hdr {
75 struct ipv6_rt_hdr rt_hdr;
76 __u32 reserved;
77 struct in6_addr addr[0];
78
79#define rt0_type rt_hdr.type
80};
81
82
83
84
85
86struct rt2_hdr {
87 struct ipv6_rt_hdr rt_hdr;
88 __u32 reserved;
89 struct in6_addr addr;
90
91#define rt2_type rt_hdr.type
92};
93
94
95
96
97
98struct ipv6_destopt_hao {
99 __u8 type;
100 __u8 length;
101 struct in6_addr addr;
102} __attribute__((packed));
103
104
105
106
107
108
109
110
111struct ipv6hdr {
112#if defined(__LITTLE_ENDIAN_BITFIELD)
113 __u8 priority:4,
114 version:4;
115#elif defined(__BIG_ENDIAN_BITFIELD)
116 __u8 version:4,
117 priority:4;
118#else
119#error "Please fix <asm/byteorder.h>"
120#endif
121 __u8 flow_lbl[3];
122
123 __be16 payload_len;
124 __u8 nexthdr;
125 __u8 hop_limit;
126
127 struct in6_addr saddr;
128 struct in6_addr daddr;
129};
130
131#ifdef __KERNEL__
132
133
134
135struct ipv6_devconf {
136 __s32 forwarding;
137 __s32 hop_limit;
138 __s32 mtu6;
139 __s32 accept_ra;
140 __s32 accept_redirects;
141 __s32 autoconf;
142 __s32 dad_transmits;
143 __s32 rtr_solicits;
144 __s32 rtr_solicit_interval;
145 __s32 rtr_solicit_delay;
146 __s32 force_mld_version;
147#ifdef CONFIG_IPV6_PRIVACY
148 __s32 use_tempaddr;
149 __s32 temp_valid_lft;
150 __s32 temp_prefered_lft;
151 __s32 regen_max_retry;
152 __s32 max_desync_factor;
153#endif
154 __s32 max_addresses;
155 __s32 accept_ra_defrtr;
156 __s32 accept_ra_pinfo;
157#ifdef CONFIG_IPV6_ROUTER_PREF
158 __s32 accept_ra_rtr_pref;
159 __s32 rtr_probe_interval;
160#ifdef CONFIG_IPV6_ROUTE_INFO
161 __s32 accept_ra_rt_info_max_plen;
162#endif
163#endif
164 __s32 proxy_ndp;
165 __s32 accept_source_route;
166#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
167 __s32 optimistic_dad;
168#endif
169#ifdef CONFIG_IPV6_MROUTE
170 __s32 mc_forwarding;
171#endif
172 __s32 disable_ipv6;
173 __s32 accept_dad;
174 __s32 force_tllao;
175 void *sysctl;
176};
177
178struct ipv6_params {
179 __s32 disable_ipv6;
180 __s32 autoconf;
181};
182extern struct ipv6_params ipv6_defaults;
183#endif
184
185
186enum {
187 DEVCONF_FORWARDING = 0,
188 DEVCONF_HOPLIMIT,
189 DEVCONF_MTU6,
190 DEVCONF_ACCEPT_RA,
191 DEVCONF_ACCEPT_REDIRECTS,
192 DEVCONF_AUTOCONF,
193 DEVCONF_DAD_TRANSMITS,
194 DEVCONF_RTR_SOLICITS,
195 DEVCONF_RTR_SOLICIT_INTERVAL,
196 DEVCONF_RTR_SOLICIT_DELAY,
197 DEVCONF_USE_TEMPADDR,
198 DEVCONF_TEMP_VALID_LFT,
199 DEVCONF_TEMP_PREFERED_LFT,
200 DEVCONF_REGEN_MAX_RETRY,
201 DEVCONF_MAX_DESYNC_FACTOR,
202 DEVCONF_MAX_ADDRESSES,
203 DEVCONF_FORCE_MLD_VERSION,
204 DEVCONF_ACCEPT_RA_DEFRTR,
205 DEVCONF_ACCEPT_RA_PINFO,
206 DEVCONF_ACCEPT_RA_RTR_PREF,
207 DEVCONF_RTR_PROBE_INTERVAL,
208 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
209 DEVCONF_PROXY_NDP,
210 DEVCONF_OPTIMISTIC_DAD,
211 DEVCONF_ACCEPT_SOURCE_ROUTE,
212 DEVCONF_MC_FORWARDING,
213 DEVCONF_DISABLE_IPV6,
214 DEVCONF_ACCEPT_DAD,
215 DEVCONF_FORCE_TLLAO,
216 DEVCONF_MAX
217};
218
219#ifdef __KERNEL__
220#include <linux/icmpv6.h>
221#include <linux/tcp.h>
222#include <linux/udp.h>
223
224#include <net/inet_sock.h>
225
226static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
227{
228 return (struct ipv6hdr *)skb_network_header(skb);
229}
230
231static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
232{
233 return (struct ipv6hdr *)skb_transport_header(skb);
234}
235
236
237
238
239
240
241struct inet6_skb_parm {
242 int iif;
243 __u16 ra;
244 __u16 hop;
245 __u16 dst0;
246 __u16 srcrt;
247 __u16 dst1;
248 __u16 lastopt;
249 __u16 nhoff;
250 __u16 flags;
251#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
252 __u16 dsthao;
253#endif
254
255#define IP6SKB_XFRM_TRANSFORMED 1
256#define IP6SKB_FORWARDED 2
257#define IP6SKB_REROUTED 4
258};
259
260#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
261#define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
262
263static inline int inet6_iif(const struct sk_buff *skb)
264{
265 return IP6CB(skb)->iif;
266}
267
268struct inet6_request_sock {
269 struct in6_addr loc_addr;
270 struct in6_addr rmt_addr;
271 struct sk_buff *pktopts;
272 int iif;
273};
274
275struct tcp6_request_sock {
276 struct tcp_request_sock tcp6rsk_tcp;
277 struct inet6_request_sock tcp6rsk_inet6;
278};
279
280struct ipv6_mc_socklist;
281struct ipv6_ac_socklist;
282struct ipv6_fl_socklist;
283
284
285
286
287
288
289
290
291
292struct ipv6_pinfo {
293 struct in6_addr saddr;
294 struct in6_addr rcv_saddr;
295 struct in6_addr daddr;
296 struct in6_pktinfo sticky_pktinfo;
297 struct in6_addr *daddr_cache;
298#ifdef CONFIG_IPV6_SUBTREES
299 struct in6_addr *saddr_cache;
300#endif
301
302 __be32 flow_label;
303 __u32 frag_size;
304
305
306
307
308
309#if defined(__BIG_ENDIAN_BITFIELD)
310 __s16 hop_limit:9;
311 __u16 __unused_1:7;
312#else
313 __u16 __unused_1:7;
314 __s16 hop_limit:9;
315#endif
316
317#if defined(__BIG_ENDIAN_BITFIELD)
318
319 __s16 mcast_hops:9;
320 __u16 __unused_2:6,
321 mc_loop:1;
322#else
323 __u16 mc_loop:1,
324 __unused_2:6;
325 __s16 mcast_hops:9;
326#endif
327 int mcast_oif;
328
329
330 union {
331 struct {
332 __u16 srcrt:1,
333 osrcrt:1,
334 rxinfo:1,
335 rxoinfo:1,
336 rxhlim:1,
337 rxohlim:1,
338 hopopts:1,
339 ohopopts:1,
340 dstopts:1,
341 odstopts:1,
342 rxflow:1,
343 rxtclass:1,
344 rxpmtu:1,
345 rxorigdstaddr:1;
346
347 } bits;
348 __u16 all;
349 } rxopt;
350
351
352 __u16 recverr:1,
353 sndflow:1,
354 pmtudisc:2,
355 ipv6only:1,
356 srcprefs:3,
357
358
359
360 dontfrag:1;
361 __u8 min_hopcount;
362 __u8 tclass;
363 __u8 padding;
364
365 __u32 dst_cookie;
366
367 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
368 struct ipv6_ac_socklist *ipv6_ac_list;
369 struct ipv6_fl_socklist *ipv6_fl_list;
370
371 struct ipv6_txoptions *opt;
372 struct sk_buff *pktoptions;
373 struct sk_buff *rxpmtu;
374 struct {
375 struct ipv6_txoptions *opt;
376 u8 hop_limit;
377 u8 tclass;
378 } cork;
379};
380
381
382struct raw6_sock {
383
384 struct inet_sock inet;
385 __u32 checksum;
386 __u32 offset;
387 struct icmp6_filter filter;
388 __u32 ip6mr_table;
389
390 struct ipv6_pinfo inet6;
391};
392
393struct udp6_sock {
394 struct udp_sock udp;
395
396 struct ipv6_pinfo inet6;
397};
398
399struct tcp6_sock {
400 struct tcp_sock tcp;
401
402 struct ipv6_pinfo inet6;
403};
404
405extern int inet6_sk_rebuild_header(struct sock *sk);
406
407#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
408static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
409{
410 return inet_sk(__sk)->pinet6;
411}
412
413static inline struct inet6_request_sock *
414 inet6_rsk(const struct request_sock *rsk)
415{
416 return (struct inet6_request_sock *)(((u8 *)rsk) +
417 inet_rsk(rsk)->inet6_rsk_offset);
418}
419
420static inline u32 inet6_rsk_offset(struct request_sock *rsk)
421{
422 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
423}
424
425static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
426{
427 struct request_sock *req = reqsk_alloc(ops);
428
429 if (req != NULL) {
430 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
431 inet6_rsk(req)->pktopts = NULL;
432 }
433
434 return req;
435}
436
437static inline struct raw6_sock *raw6_sk(const struct sock *sk)
438{
439 return (struct raw6_sock *)sk;
440}
441
442static inline void inet_sk_copy_descendant(struct sock *sk_to,
443 const struct sock *sk_from)
444{
445 int ancestor_size = sizeof(struct inet_sock);
446
447 if (sk_from->sk_family == PF_INET6)
448 ancestor_size += sizeof(struct ipv6_pinfo);
449
450 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
451}
452
453#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
454#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
455
456struct inet6_timewait_sock {
457 struct in6_addr tw_v6_daddr;
458 struct in6_addr tw_v6_rcv_saddr;
459};
460
461struct tcp6_timewait_sock {
462 struct tcp_timewait_sock tcp6tw_tcp;
463 struct inet6_timewait_sock tcp6tw_inet6;
464};
465
466static inline u16 inet6_tw_offset(const struct proto *prot)
467{
468 return prot->twsk_prot->twsk_obj_size -
469 sizeof(struct inet6_timewait_sock);
470}
471
472static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
473{
474 return (struct inet6_timewait_sock *)(((u8 *)sk) +
475 inet_twsk(sk)->tw_ipv6_offset);
476}
477
478static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
479{
480 return likely(sk->sk_state != TCP_TIME_WAIT) ?
481 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
482}
483
484static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
485{
486 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
487}
488
489static inline int inet_v6_ipv6only(const struct sock *sk)
490{
491 return likely(sk->sk_state != TCP_TIME_WAIT) ?
492 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
493}
494#else
495#define __ipv6_only_sock(sk) 0
496#define ipv6_only_sock(sk) 0
497
498static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
499{
500 return NULL;
501}
502
503static inline struct inet6_request_sock *
504 inet6_rsk(const struct request_sock *rsk)
505{
506 return NULL;
507}
508
509static inline struct raw6_sock *raw6_sk(const struct sock *sk)
510{
511 return NULL;
512}
513
514#define __inet6_rcv_saddr(__sk) NULL
515#define inet6_rcv_saddr(__sk) NULL
516#define tcp_twsk_ipv6only(__sk) 0
517#define inet_v6_ipv6only(__sk) 0
518#endif
519
520#define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\
521 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
522 ((*((__portpair *)&(inet_sk(__sk)->inet_dport))) == (__ports)) && \
523 ((__sk)->sk_family == AF_INET6) && \
524 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
525 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
526 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
527
528#define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \
529 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
530 (*((__portpair *)&(inet_twsk(__sk)->tw_dport)) == (__ports)) && \
531 ((__sk)->sk_family == PF_INET6) && \
532 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr))) && \
533 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr))) && \
534 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
535
536#endif
537
538#endif
539
