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1da177e4 LT |
1 | #ifndef _IPV6_H |
2 | #define _IPV6_H | |
3 | ||
1da177e4 LT |
4 | #include <linux/in6.h> |
5 | #include <asm/byteorder.h> | |
6 | ||
7 | /* The latest drafts declared increase in minimal mtu up to 1280. */ | |
8 | ||
9 | #define IPV6_MIN_MTU 1280 | |
10 | ||
11 | /* | |
12 | * Advanced API | |
13 | * source interface/address selection, source routing, etc... | |
14 | * *under construction* | |
15 | */ | |
16 | ||
17 | ||
18 | struct in6_pktinfo { | |
19 | struct in6_addr ipi6_addr; | |
20 | int ipi6_ifindex; | |
21 | }; | |
22 | ||
23 | ||
24 | struct in6_ifreq { | |
25 | struct in6_addr ifr6_addr; | |
26 | __u32 ifr6_prefixlen; | |
27 | int ifr6_ifindex; | |
28 | }; | |
29 | ||
30 | #define IPV6_SRCRT_STRICT 0x01 /* this hop must be a neighbor */ | |
31 | #define IPV6_SRCRT_TYPE_0 0 /* IPv6 type 0 Routing Header */ | |
642ec62e | 32 | #define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */ |
1da177e4 LT |
33 | |
34 | /* | |
35 | * routing header | |
36 | */ | |
37 | struct ipv6_rt_hdr { | |
38 | __u8 nexthdr; | |
39 | __u8 hdrlen; | |
40 | __u8 type; | |
41 | __u8 segments_left; | |
42 | ||
43 | /* | |
44 | * type specific data | |
45 | * variable length field | |
46 | */ | |
47 | }; | |
48 | ||
49 | ||
50 | struct ipv6_opt_hdr { | |
51 | __u8 nexthdr; | |
52 | __u8 hdrlen; | |
53 | /* | |
54 | * TLV encoded option data follows. | |
55 | */ | |
56 | }; | |
57 | ||
58 | #define ipv6_destopt_hdr ipv6_opt_hdr | |
59 | #define ipv6_hopopt_hdr ipv6_opt_hdr | |
60 | ||
61 | #ifdef __KERNEL__ | |
62 | #define ipv6_optlen(p) (((p)->hdrlen+1) << 3) | |
63 | #endif | |
64 | ||
65 | /* | |
66 | * routing header type 0 (used in cmsghdr struct) | |
67 | */ | |
68 | ||
69 | struct rt0_hdr { | |
70 | struct ipv6_rt_hdr rt_hdr; | |
e6df439b | 71 | __u32 reserved; |
1da177e4 LT |
72 | struct in6_addr addr[0]; |
73 | ||
74 | #define rt0_type rt_hdr.type | |
75 | }; | |
76 | ||
642ec62e NT |
77 | /* |
78 | * routing header type 2 | |
79 | */ | |
80 | ||
81 | struct rt2_hdr { | |
82 | struct ipv6_rt_hdr rt_hdr; | |
83 | __u32 reserved; | |
84 | struct in6_addr addr; | |
85 | ||
86 | #define rt2_type rt_hdr.type | |
87 | }; | |
88 | ||
842426e7 NT |
89 | /* |
90 | * home address option in destination options header | |
91 | */ | |
92 | ||
93 | struct ipv6_destopt_hao { | |
94 | __u8 type; | |
95 | __u8 length; | |
96 | struct in6_addr addr; | |
97 | } __attribute__ ((__packed__)); | |
98 | ||
1da177e4 LT |
99 | struct ipv6_auth_hdr { |
100 | __u8 nexthdr; | |
101 | __u8 hdrlen; /* This one is measured in 32 bit units! */ | |
43505077 AV |
102 | __be16 reserved; |
103 | __be32 spi; | |
104 | __be32 seq_no; /* Sequence number */ | |
1da177e4 LT |
105 | __u8 auth_data[0]; /* Length variable but >=4. Mind the 64 bit alignment! */ |
106 | }; | |
107 | ||
108 | struct ipv6_esp_hdr { | |
43505077 AV |
109 | __be32 spi; |
110 | __be32 seq_no; /* Sequence number */ | |
1da177e4 LT |
111 | __u8 enc_data[0]; /* Length variable but >=8. Mind the 64 bit alignment! */ |
112 | }; | |
113 | ||
114 | struct ipv6_comp_hdr { | |
115 | __u8 nexthdr; | |
116 | __u8 flags; | |
43505077 | 117 | __be16 cpi; |
1da177e4 LT |
118 | }; |
119 | ||
120 | /* | |
121 | * IPv6 fixed header | |
122 | * | |
123 | * BEWARE, it is incorrect. The first 4 bits of flow_lbl | |
124 | * are glued to priority now, forming "class". | |
125 | */ | |
126 | ||
127 | struct ipv6hdr { | |
128 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
129 | __u8 priority:4, | |
130 | version:4; | |
131 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
132 | __u8 version:4, | |
133 | priority:4; | |
134 | #else | |
135 | #error "Please fix <asm/byteorder.h>" | |
136 | #endif | |
137 | __u8 flow_lbl[3]; | |
138 | ||
43505077 | 139 | __be16 payload_len; |
1da177e4 LT |
140 | __u8 nexthdr; |
141 | __u8 hop_limit; | |
142 | ||
143 | struct in6_addr saddr; | |
144 | struct in6_addr daddr; | |
145 | }; | |
146 | ||
147 | /* | |
148 | * This structure contains configuration options per IPv6 link. | |
149 | */ | |
150 | struct ipv6_devconf { | |
151 | __s32 forwarding; | |
152 | __s32 hop_limit; | |
153 | __s32 mtu6; | |
154 | __s32 accept_ra; | |
155 | __s32 accept_redirects; | |
156 | __s32 autoconf; | |
157 | __s32 dad_transmits; | |
158 | __s32 rtr_solicits; | |
159 | __s32 rtr_solicit_interval; | |
160 | __s32 rtr_solicit_delay; | |
161 | __s32 force_mld_version; | |
162 | #ifdef CONFIG_IPV6_PRIVACY | |
163 | __s32 use_tempaddr; | |
164 | __s32 temp_valid_lft; | |
165 | __s32 temp_prefered_lft; | |
166 | __s32 regen_max_retry; | |
167 | __s32 max_desync_factor; | |
168 | #endif | |
169 | __s32 max_addresses; | |
65f5c7c1 | 170 | __s32 accept_ra_defrtr; |
c4fd30eb | 171 | __s32 accept_ra_pinfo; |
930d6ff2 YH |
172 | #ifdef CONFIG_IPV6_ROUTER_PREF |
173 | __s32 accept_ra_rtr_pref; | |
52e16356 | 174 | __s32 rtr_probe_interval; |
09c884d4 YH |
175 | #ifdef CONFIG_IPV6_ROUTE_INFO |
176 | __s32 accept_ra_rt_info_max_plen; | |
177 | #endif | |
930d6ff2 | 178 | #endif |
fbea49e1 | 179 | __s32 proxy_ndp; |
0bcbc926 | 180 | __s32 accept_source_route; |
95c385b4 NH |
181 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
182 | __s32 optimistic_dad; | |
183 | #endif | |
1da177e4 LT |
184 | void *sysctl; |
185 | }; | |
186 | ||
187 | /* index values for the variables in ipv6_devconf */ | |
188 | enum { | |
189 | DEVCONF_FORWARDING = 0, | |
190 | DEVCONF_HOPLIMIT, | |
191 | DEVCONF_MTU6, | |
192 | DEVCONF_ACCEPT_RA, | |
193 | DEVCONF_ACCEPT_REDIRECTS, | |
194 | DEVCONF_AUTOCONF, | |
195 | DEVCONF_DAD_TRANSMITS, | |
196 | DEVCONF_RTR_SOLICITS, | |
197 | DEVCONF_RTR_SOLICIT_INTERVAL, | |
198 | DEVCONF_RTR_SOLICIT_DELAY, | |
199 | DEVCONF_USE_TEMPADDR, | |
200 | DEVCONF_TEMP_VALID_LFT, | |
201 | DEVCONF_TEMP_PREFERED_LFT, | |
202 | DEVCONF_REGEN_MAX_RETRY, | |
203 | DEVCONF_MAX_DESYNC_FACTOR, | |
204 | DEVCONF_MAX_ADDRESSES, | |
205 | DEVCONF_FORCE_MLD_VERSION, | |
65f5c7c1 | 206 | DEVCONF_ACCEPT_RA_DEFRTR, |
c4fd30eb | 207 | DEVCONF_ACCEPT_RA_PINFO, |
930d6ff2 | 208 | DEVCONF_ACCEPT_RA_RTR_PREF, |
52e16356 | 209 | DEVCONF_RTR_PROBE_INTERVAL, |
09c884d4 | 210 | DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN, |
fbea49e1 | 211 | DEVCONF_PROXY_NDP, |
95c385b4 | 212 | DEVCONF_OPTIMISTIC_DAD, |
4540250b | 213 | DEVCONF_ACCEPT_SOURCE_ROUTE, |
1da177e4 LT |
214 | DEVCONF_MAX |
215 | }; | |
216 | ||
217 | #ifdef __KERNEL__ | |
1da177e4 | 218 | #include <linux/icmpv6.h> |
1da177e4 LT |
219 | #include <linux/tcp.h> |
220 | #include <linux/udp.h> | |
221 | ||
14c85021 ACM |
222 | #include <net/if_inet6.h> /* struct ipv6_mc_socklist */ |
223 | #include <net/inet_sock.h> | |
224 | ||
0660e03f ACM |
225 | static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) |
226 | { | |
227 | return (struct ipv6hdr *)skb_network_header(skb); | |
228 | } | |
229 | ||
39b89160 ACM |
230 | static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb) |
231 | { | |
9c70220b | 232 | return (struct ipv6hdr *)skb_transport_header(skb); |
39b89160 ACM |
233 | } |
234 | ||
1da177e4 LT |
235 | /* |
236 | This structure contains results of exthdrs parsing | |
237 | as offsets from skb->nh. | |
238 | */ | |
239 | ||
240 | struct inet6_skb_parm { | |
241 | int iif; | |
242 | __u16 ra; | |
243 | __u16 hop; | |
244 | __u16 dst0; | |
245 | __u16 srcrt; | |
246 | __u16 dst1; | |
333fad53 | 247 | __u16 lastopt; |
951dbc8a | 248 | __u32 nhoff; |
3e3850e9 | 249 | __u16 flags; |
59fbb3a6 | 250 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
8dd7368d DM |
251 | __u16 dsthao; |
252 | #endif | |
3e3850e9 PM |
253 | |
254 | #define IP6SKB_XFRM_TRANSFORMED 1 | |
1da177e4 LT |
255 | }; |
256 | ||
257 | #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) | |
258 | ||
505cbfc5 ACM |
259 | static inline int inet6_iif(const struct sk_buff *skb) |
260 | { | |
261 | return IP6CB(skb)->iif; | |
262 | } | |
263 | ||
ca304b61 | 264 | struct inet6_request_sock { |
2e6599cb ACM |
265 | struct in6_addr loc_addr; |
266 | struct in6_addr rmt_addr; | |
267 | struct sk_buff *pktopts; | |
268 | int iif; | |
269 | }; | |
270 | ||
ca304b61 ACM |
271 | struct tcp6_request_sock { |
272 | struct tcp_request_sock tcp6rsk_tcp; | |
273 | struct inet6_request_sock tcp6rsk_inet6; | |
274 | }; | |
2e6599cb | 275 | |
1da177e4 LT |
276 | /** |
277 | * struct ipv6_pinfo - ipv6 private area | |
278 | * | |
279 | * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc) | |
280 | * this _must_ be the last member, so that inet6_sk_generic | |
281 | * is able to calculate its offset from the base struct sock | |
282 | * by using the struct proto->slab_obj_size member. -acme | |
283 | */ | |
284 | struct ipv6_pinfo { | |
285 | struct in6_addr saddr; | |
286 | struct in6_addr rcv_saddr; | |
287 | struct in6_addr daddr; | |
288 | struct in6_addr *daddr_cache; | |
8e1ef0a9 YH |
289 | #ifdef CONFIG_IPV6_SUBTREES |
290 | struct in6_addr *saddr_cache; | |
291 | #endif | |
1da177e4 | 292 | |
90bcaf7b | 293 | __be32 flow_label; |
1da177e4 LT |
294 | __u32 frag_size; |
295 | __s16 hop_limit; | |
296 | __s16 mcast_hops; | |
297 | int mcast_oif; | |
298 | ||
299 | /* pktoption flags */ | |
300 | union { | |
301 | struct { | |
333fad53 YH |
302 | __u16 srcrt:2, |
303 | osrcrt:2, | |
1da177e4 | 304 | rxinfo:1, |
333fad53 | 305 | rxoinfo:1, |
1da177e4 | 306 | rxhlim:1, |
333fad53 | 307 | rxohlim:1, |
1da177e4 | 308 | hopopts:1, |
333fad53 | 309 | ohopopts:1, |
1da177e4 | 310 | dstopts:1, |
333fad53 | 311 | odstopts:1, |
41a1f8ea YH |
312 | rxflow:1, |
313 | rxtclass:1; | |
1da177e4 | 314 | } bits; |
333fad53 | 315 | __u16 all; |
1da177e4 LT |
316 | } rxopt; |
317 | ||
318 | /* sockopt flags */ | |
319 | __u8 mc_loop:1, | |
320 | recverr:1, | |
321 | sndflow:1, | |
322 | pmtudisc:2, | |
323 | ipv6only:1; | |
41a1f8ea | 324 | __u8 tclass; |
1da177e4 LT |
325 | |
326 | __u32 dst_cookie; | |
327 | ||
328 | struct ipv6_mc_socklist *ipv6_mc_list; | |
329 | struct ipv6_ac_socklist *ipv6_ac_list; | |
330 | struct ipv6_fl_socklist *ipv6_fl_list; | |
331 | ||
332 | struct ipv6_txoptions *opt; | |
333 | struct sk_buff *pktoptions; | |
334 | struct { | |
335 | struct ipv6_txoptions *opt; | |
336 | struct rt6_info *rt; | |
337 | int hop_limit; | |
41a1f8ea | 338 | int tclass; |
1da177e4 LT |
339 | } cork; |
340 | }; | |
341 | ||
342 | /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ | |
343 | struct raw6_sock { | |
344 | /* inet_sock has to be the first member of raw6_sock */ | |
345 | struct inet_sock inet; | |
346 | __u32 checksum; /* perform checksum */ | |
347 | __u32 offset; /* checksum offset */ | |
348 | struct icmp6_filter filter; | |
349 | /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */ | |
350 | struct ipv6_pinfo inet6; | |
351 | }; | |
352 | ||
353 | struct udp6_sock { | |
354 | struct udp_sock udp; | |
355 | /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */ | |
356 | struct ipv6_pinfo inet6; | |
357 | }; | |
358 | ||
359 | struct tcp6_sock { | |
360 | struct tcp_sock tcp; | |
361 | /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */ | |
362 | struct ipv6_pinfo inet6; | |
363 | }; | |
364 | ||
b9750ce1 ACM |
365 | extern int inet6_sk_rebuild_header(struct sock *sk); |
366 | ||
1da177e4 LT |
367 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
368 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) | |
369 | { | |
370 | return inet_sk(__sk)->pinet6; | |
371 | } | |
372 | ||
ca304b61 ACM |
373 | static inline struct inet6_request_sock * |
374 | inet6_rsk(const struct request_sock *rsk) | |
375 | { | |
376 | return (struct inet6_request_sock *)(((u8 *)rsk) + | |
377 | inet_rsk(rsk)->inet6_rsk_offset); | |
378 | } | |
379 | ||
380 | static inline u32 inet6_rsk_offset(struct request_sock *rsk) | |
381 | { | |
382 | return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock); | |
383 | } | |
384 | ||
385 | static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops) | |
386 | { | |
387 | struct request_sock *req = reqsk_alloc(ops); | |
388 | ||
389 | if (req != NULL) | |
390 | inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req); | |
391 | ||
392 | return req; | |
393 | } | |
394 | ||
1da177e4 LT |
395 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
396 | { | |
397 | return (struct raw6_sock *)sk; | |
398 | } | |
399 | ||
400 | static inline void inet_sk_copy_descendant(struct sock *sk_to, | |
401 | const struct sock *sk_from) | |
402 | { | |
403 | int ancestor_size = sizeof(struct inet_sock); | |
404 | ||
405 | if (sk_from->sk_family == PF_INET6) | |
406 | ancestor_size += sizeof(struct ipv6_pinfo); | |
407 | ||
408 | __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size); | |
409 | } | |
410 | ||
411 | #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only) | |
412 | #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk)) | |
8feaf0c0 | 413 | |
0fa1a53e ACM |
414 | struct inet6_timewait_sock { |
415 | struct in6_addr tw_v6_daddr; | |
416 | struct in6_addr tw_v6_rcv_saddr; | |
417 | }; | |
418 | ||
8feaf0c0 | 419 | struct tcp6_timewait_sock { |
0fa1a53e ACM |
420 | struct tcp_timewait_sock tcp6tw_tcp; |
421 | struct inet6_timewait_sock tcp6tw_inet6; | |
8feaf0c0 ACM |
422 | }; |
423 | ||
0fa1a53e ACM |
424 | static inline u16 inet6_tw_offset(const struct proto *prot) |
425 | { | |
6d6ee43e ACM |
426 | return prot->twsk_prot->twsk_obj_size - |
427 | sizeof(struct inet6_timewait_sock); | |
0fa1a53e ACM |
428 | } |
429 | ||
430 | static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk) | |
8feaf0c0 | 431 | { |
0fa1a53e ACM |
432 | return (struct inet6_timewait_sock *)(((u8 *)sk) + |
433 | inet_twsk(sk)->tw_ipv6_offset); | |
8feaf0c0 ACM |
434 | } |
435 | ||
0fa1a53e | 436 | static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk) |
8feaf0c0 ACM |
437 | { |
438 | return likely(sk->sk_state != TCP_TIME_WAIT) ? | |
0fa1a53e | 439 | &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr; |
8feaf0c0 ACM |
440 | } |
441 | ||
0fa1a53e | 442 | static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk) |
8feaf0c0 | 443 | { |
0fa1a53e | 444 | return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL; |
8feaf0c0 ACM |
445 | } |
446 | ||
463c84b9 | 447 | static inline int inet_v6_ipv6only(const struct sock *sk) |
8feaf0c0 ACM |
448 | { |
449 | return likely(sk->sk_state != TCP_TIME_WAIT) ? | |
3f421baa | 450 | ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only; |
8feaf0c0 | 451 | } |
1da177e4 LT |
452 | #else |
453 | #define __ipv6_only_sock(sk) 0 | |
454 | #define ipv6_only_sock(sk) 0 | |
455 | ||
456 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) | |
457 | { | |
458 | return NULL; | |
459 | } | |
460 | ||
ca304b61 ACM |
461 | static inline struct inet6_request_sock * |
462 | inet6_rsk(const struct request_sock *rsk) | |
463 | { | |
464 | return NULL; | |
465 | } | |
466 | ||
1da177e4 LT |
467 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
468 | { | |
469 | return NULL; | |
470 | } | |
471 | ||
0fa1a53e ACM |
472 | #define __inet6_rcv_saddr(__sk) NULL |
473 | #define inet6_rcv_saddr(__sk) NULL | |
8feaf0c0 | 474 | #define tcp_twsk_ipv6only(__sk) 0 |
463c84b9 | 475 | #define inet_v6_ipv6only(__sk) 0 |
8feaf0c0 | 476 | #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */ |
1da177e4 | 477 | |
81c3d547 ED |
478 | #define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\ |
479 | (((__sk)->sk_hash == (__hash)) && \ | |
4f765d84 | 480 | ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports)) && \ |
8feaf0c0 ACM |
481 | ((__sk)->sk_family == AF_INET6) && \ |
482 | ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \ | |
483 | ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \ | |
484 | (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif)))) | |
1da177e4 | 485 | |
8feaf0c0 ACM |
486 | #endif /* __KERNEL__ */ |
487 | ||
488 | #endif /* _IPV6_H */ |