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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 | ||
bb4dbf9e YH |
30 | #define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */ |
31 | #define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */ | |
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 | */ | |
7cd636fe | 56 | } __attribute__ ((packed)); /* required for some archs */ |
1da177e4 LT |
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 | /* |
100 | * IPv6 fixed header | |
101 | * | |
102 | * BEWARE, it is incorrect. The first 4 bits of flow_lbl | |
103 | * are glued to priority now, forming "class". | |
104 | */ | |
105 | ||
106 | struct ipv6hdr { | |
107 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
108 | __u8 priority:4, | |
109 | version:4; | |
110 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
111 | __u8 version:4, | |
112 | priority:4; | |
113 | #else | |
114 | #error "Please fix <asm/byteorder.h>" | |
115 | #endif | |
116 | __u8 flow_lbl[3]; | |
117 | ||
43505077 | 118 | __be16 payload_len; |
1da177e4 LT |
119 | __u8 nexthdr; |
120 | __u8 hop_limit; | |
121 | ||
122 | struct in6_addr saddr; | |
123 | struct in6_addr daddr; | |
124 | }; | |
125 | ||
126 | /* | |
127 | * This structure contains configuration options per IPv6 link. | |
128 | */ | |
129 | struct ipv6_devconf { | |
130 | __s32 forwarding; | |
131 | __s32 hop_limit; | |
132 | __s32 mtu6; | |
133 | __s32 accept_ra; | |
134 | __s32 accept_redirects; | |
135 | __s32 autoconf; | |
136 | __s32 dad_transmits; | |
137 | __s32 rtr_solicits; | |
138 | __s32 rtr_solicit_interval; | |
139 | __s32 rtr_solicit_delay; | |
140 | __s32 force_mld_version; | |
141 | #ifdef CONFIG_IPV6_PRIVACY | |
142 | __s32 use_tempaddr; | |
143 | __s32 temp_valid_lft; | |
144 | __s32 temp_prefered_lft; | |
145 | __s32 regen_max_retry; | |
146 | __s32 max_desync_factor; | |
147 | #endif | |
148 | __s32 max_addresses; | |
65f5c7c1 | 149 | __s32 accept_ra_defrtr; |
c4fd30eb | 150 | __s32 accept_ra_pinfo; |
930d6ff2 YH |
151 | #ifdef CONFIG_IPV6_ROUTER_PREF |
152 | __s32 accept_ra_rtr_pref; | |
52e16356 | 153 | __s32 rtr_probe_interval; |
09c884d4 YH |
154 | #ifdef CONFIG_IPV6_ROUTE_INFO |
155 | __s32 accept_ra_rt_info_max_plen; | |
156 | #endif | |
930d6ff2 | 157 | #endif |
fbea49e1 | 158 | __s32 proxy_ndp; |
0bcbc926 | 159 | __s32 accept_source_route; |
95c385b4 NH |
160 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
161 | __s32 optimistic_dad; | |
7bc570c8 YH |
162 | #endif |
163 | #ifdef CONFIG_IPV6_MROUTE | |
164 | __s32 mc_forwarding; | |
95c385b4 | 165 | #endif |
1da177e4 LT |
166 | void *sysctl; |
167 | }; | |
168 | ||
169 | /* index values for the variables in ipv6_devconf */ | |
170 | enum { | |
171 | DEVCONF_FORWARDING = 0, | |
172 | DEVCONF_HOPLIMIT, | |
173 | DEVCONF_MTU6, | |
174 | DEVCONF_ACCEPT_RA, | |
175 | DEVCONF_ACCEPT_REDIRECTS, | |
176 | DEVCONF_AUTOCONF, | |
177 | DEVCONF_DAD_TRANSMITS, | |
178 | DEVCONF_RTR_SOLICITS, | |
179 | DEVCONF_RTR_SOLICIT_INTERVAL, | |
180 | DEVCONF_RTR_SOLICIT_DELAY, | |
181 | DEVCONF_USE_TEMPADDR, | |
182 | DEVCONF_TEMP_VALID_LFT, | |
183 | DEVCONF_TEMP_PREFERED_LFT, | |
184 | DEVCONF_REGEN_MAX_RETRY, | |
185 | DEVCONF_MAX_DESYNC_FACTOR, | |
186 | DEVCONF_MAX_ADDRESSES, | |
187 | DEVCONF_FORCE_MLD_VERSION, | |
65f5c7c1 | 188 | DEVCONF_ACCEPT_RA_DEFRTR, |
c4fd30eb | 189 | DEVCONF_ACCEPT_RA_PINFO, |
930d6ff2 | 190 | DEVCONF_ACCEPT_RA_RTR_PREF, |
52e16356 | 191 | DEVCONF_RTR_PROBE_INTERVAL, |
09c884d4 | 192 | DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN, |
fbea49e1 | 193 | DEVCONF_PROXY_NDP, |
95c385b4 | 194 | DEVCONF_OPTIMISTIC_DAD, |
4540250b | 195 | DEVCONF_ACCEPT_SOURCE_ROUTE, |
7bc570c8 | 196 | DEVCONF_MC_FORWARDING, |
1da177e4 LT |
197 | DEVCONF_MAX |
198 | }; | |
199 | ||
200 | #ifdef __KERNEL__ | |
1da177e4 | 201 | #include <linux/icmpv6.h> |
1da177e4 LT |
202 | #include <linux/tcp.h> |
203 | #include <linux/udp.h> | |
204 | ||
14c85021 ACM |
205 | #include <net/inet_sock.h> |
206 | ||
0660e03f ACM |
207 | static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) |
208 | { | |
209 | return (struct ipv6hdr *)skb_network_header(skb); | |
210 | } | |
211 | ||
39b89160 ACM |
212 | static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb) |
213 | { | |
9c70220b | 214 | return (struct ipv6hdr *)skb_transport_header(skb); |
39b89160 ACM |
215 | } |
216 | ||
1da177e4 LT |
217 | /* |
218 | This structure contains results of exthdrs parsing | |
219 | as offsets from skb->nh. | |
220 | */ | |
221 | ||
222 | struct inet6_skb_parm { | |
223 | int iif; | |
224 | __u16 ra; | |
225 | __u16 hop; | |
226 | __u16 dst0; | |
227 | __u16 srcrt; | |
228 | __u16 dst1; | |
333fad53 | 229 | __u16 lastopt; |
951dbc8a | 230 | __u32 nhoff; |
3e3850e9 | 231 | __u16 flags; |
59fbb3a6 | 232 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
8dd7368d DM |
233 | __u16 dsthao; |
234 | #endif | |
3e3850e9 PM |
235 | |
236 | #define IP6SKB_XFRM_TRANSFORMED 1 | |
7bc570c8 | 237 | #define IP6SKB_FORWARDED 2 |
1da177e4 LT |
238 | }; |
239 | ||
240 | #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) | |
241 | ||
505cbfc5 ACM |
242 | static inline int inet6_iif(const struct sk_buff *skb) |
243 | { | |
244 | return IP6CB(skb)->iif; | |
245 | } | |
246 | ||
ca304b61 | 247 | struct inet6_request_sock { |
2e6599cb ACM |
248 | struct in6_addr loc_addr; |
249 | struct in6_addr rmt_addr; | |
250 | struct sk_buff *pktopts; | |
251 | int iif; | |
252 | }; | |
253 | ||
ca304b61 ACM |
254 | struct tcp6_request_sock { |
255 | struct tcp_request_sock tcp6rsk_tcp; | |
256 | struct inet6_request_sock tcp6rsk_inet6; | |
257 | }; | |
2e6599cb | 258 | |
20283d84 HX |
259 | struct ipv6_mc_socklist; |
260 | struct ipv6_ac_socklist; | |
261 | struct ipv6_fl_socklist; | |
262 | ||
1da177e4 LT |
263 | /** |
264 | * struct ipv6_pinfo - ipv6 private area | |
265 | * | |
266 | * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc) | |
267 | * this _must_ be the last member, so that inet6_sk_generic | |
268 | * is able to calculate its offset from the base struct sock | |
269 | * by using the struct proto->slab_obj_size member. -acme | |
270 | */ | |
271 | struct ipv6_pinfo { | |
272 | struct in6_addr saddr; | |
273 | struct in6_addr rcv_saddr; | |
274 | struct in6_addr daddr; | |
275 | struct in6_addr *daddr_cache; | |
8e1ef0a9 YH |
276 | #ifdef CONFIG_IPV6_SUBTREES |
277 | struct in6_addr *saddr_cache; | |
278 | #endif | |
1da177e4 | 279 | |
90bcaf7b | 280 | __be32 flow_label; |
1da177e4 | 281 | __u32 frag_size; |
1d5d236d YH |
282 | |
283 | /* | |
284 | * Packed in 16bits. | |
285 | * Omit one shift by by putting the signed field at MSB. | |
286 | */ | |
287 | #if defined(__BIG_ENDIAN_BITFIELD) | |
288 | __s16 hop_limit:9; | |
289 | __u16 __unused_1:7; | |
290 | #else | |
291 | __u16 __unused_1:7; | |
292 | __s16 hop_limit:9; | |
293 | #endif | |
294 | ||
295 | #if defined(__BIG_ENDIAN_BITFIELD) | |
296 | /* Packed in 16bits. */ | |
297 | __s16 mcast_hops:9; | |
298 | __u16 __unused_2:6, | |
299 | mc_loop:1; | |
300 | #else | |
301 | __u16 mc_loop:1, | |
302 | __unused_2:6; | |
303 | __s16 mcast_hops:9; | |
304 | #endif | |
1da177e4 LT |
305 | int mcast_oif; |
306 | ||
307 | /* pktoption flags */ | |
308 | union { | |
309 | struct { | |
4c752098 YH |
310 | __u16 srcrt:1, |
311 | osrcrt:1, | |
1da177e4 | 312 | rxinfo:1, |
333fad53 | 313 | rxoinfo:1, |
1da177e4 | 314 | rxhlim:1, |
333fad53 | 315 | rxohlim:1, |
1da177e4 | 316 | hopopts:1, |
333fad53 | 317 | ohopopts:1, |
1da177e4 | 318 | dstopts:1, |
333fad53 | 319 | odstopts:1, |
41a1f8ea YH |
320 | rxflow:1, |
321 | rxtclass:1; | |
1da177e4 | 322 | } bits; |
333fad53 | 323 | __u16 all; |
1da177e4 LT |
324 | } rxopt; |
325 | ||
326 | /* sockopt flags */ | |
1d5d236d | 327 | __u8 recverr:1, |
1da177e4 LT |
328 | sndflow:1, |
329 | pmtudisc:2, | |
7cbca67c YH |
330 | ipv6only:1, |
331 | srcprefs:3; /* 001: prefer temporary address | |
332 | * 010: prefer public address | |
333 | * 100: prefer care-of address | |
334 | */ | |
41a1f8ea | 335 | __u8 tclass; |
1da177e4 LT |
336 | |
337 | __u32 dst_cookie; | |
338 | ||
339 | struct ipv6_mc_socklist *ipv6_mc_list; | |
340 | struct ipv6_ac_socklist *ipv6_ac_list; | |
341 | struct ipv6_fl_socklist *ipv6_fl_list; | |
342 | ||
343 | struct ipv6_txoptions *opt; | |
344 | struct sk_buff *pktoptions; | |
345 | struct { | |
346 | struct ipv6_txoptions *opt; | |
47254745 YH |
347 | u8 hop_limit; |
348 | u8 tclass; | |
1da177e4 LT |
349 | } cork; |
350 | }; | |
351 | ||
352 | /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ | |
353 | struct raw6_sock { | |
354 | /* inet_sock has to be the first member of raw6_sock */ | |
355 | struct inet_sock inet; | |
356 | __u32 checksum; /* perform checksum */ | |
357 | __u32 offset; /* checksum offset */ | |
358 | struct icmp6_filter filter; | |
359 | /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */ | |
360 | struct ipv6_pinfo inet6; | |
361 | }; | |
362 | ||
363 | struct udp6_sock { | |
364 | struct udp_sock udp; | |
365 | /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */ | |
366 | struct ipv6_pinfo inet6; | |
367 | }; | |
368 | ||
369 | struct tcp6_sock { | |
370 | struct tcp_sock tcp; | |
371 | /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */ | |
372 | struct ipv6_pinfo inet6; | |
373 | }; | |
374 | ||
b9750ce1 ACM |
375 | extern int inet6_sk_rebuild_header(struct sock *sk); |
376 | ||
1da177e4 LT |
377 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
378 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) | |
379 | { | |
380 | return inet_sk(__sk)->pinet6; | |
381 | } | |
382 | ||
ca304b61 ACM |
383 | static inline struct inet6_request_sock * |
384 | inet6_rsk(const struct request_sock *rsk) | |
385 | { | |
386 | return (struct inet6_request_sock *)(((u8 *)rsk) + | |
387 | inet_rsk(rsk)->inet6_rsk_offset); | |
388 | } | |
389 | ||
390 | static inline u32 inet6_rsk_offset(struct request_sock *rsk) | |
391 | { | |
392 | return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock); | |
393 | } | |
394 | ||
395 | static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops) | |
396 | { | |
397 | struct request_sock *req = reqsk_alloc(ops); | |
398 | ||
399 | if (req != NULL) | |
400 | inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req); | |
401 | ||
402 | return req; | |
403 | } | |
404 | ||
1da177e4 LT |
405 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
406 | { | |
407 | return (struct raw6_sock *)sk; | |
408 | } | |
409 | ||
410 | static inline void inet_sk_copy_descendant(struct sock *sk_to, | |
411 | const struct sock *sk_from) | |
412 | { | |
413 | int ancestor_size = sizeof(struct inet_sock); | |
414 | ||
415 | if (sk_from->sk_family == PF_INET6) | |
416 | ancestor_size += sizeof(struct ipv6_pinfo); | |
417 | ||
418 | __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size); | |
419 | } | |
420 | ||
421 | #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only) | |
422 | #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk)) | |
8feaf0c0 | 423 | |
0fa1a53e ACM |
424 | struct inet6_timewait_sock { |
425 | struct in6_addr tw_v6_daddr; | |
426 | struct in6_addr tw_v6_rcv_saddr; | |
427 | }; | |
428 | ||
8feaf0c0 | 429 | struct tcp6_timewait_sock { |
0fa1a53e ACM |
430 | struct tcp_timewait_sock tcp6tw_tcp; |
431 | struct inet6_timewait_sock tcp6tw_inet6; | |
8feaf0c0 ACM |
432 | }; |
433 | ||
0fa1a53e ACM |
434 | static inline u16 inet6_tw_offset(const struct proto *prot) |
435 | { | |
6d6ee43e ACM |
436 | return prot->twsk_prot->twsk_obj_size - |
437 | sizeof(struct inet6_timewait_sock); | |
0fa1a53e ACM |
438 | } |
439 | ||
440 | static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk) | |
8feaf0c0 | 441 | { |
0fa1a53e ACM |
442 | return (struct inet6_timewait_sock *)(((u8 *)sk) + |
443 | inet_twsk(sk)->tw_ipv6_offset); | |
8feaf0c0 ACM |
444 | } |
445 | ||
0fa1a53e | 446 | static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk) |
8feaf0c0 ACM |
447 | { |
448 | return likely(sk->sk_state != TCP_TIME_WAIT) ? | |
0fa1a53e | 449 | &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr; |
8feaf0c0 ACM |
450 | } |
451 | ||
0fa1a53e | 452 | static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk) |
8feaf0c0 | 453 | { |
0fa1a53e | 454 | return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL; |
8feaf0c0 ACM |
455 | } |
456 | ||
463c84b9 | 457 | static inline int inet_v6_ipv6only(const struct sock *sk) |
8feaf0c0 ACM |
458 | { |
459 | return likely(sk->sk_state != TCP_TIME_WAIT) ? | |
3f421baa | 460 | ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only; |
8feaf0c0 | 461 | } |
1da177e4 LT |
462 | #else |
463 | #define __ipv6_only_sock(sk) 0 | |
464 | #define ipv6_only_sock(sk) 0 | |
465 | ||
466 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) | |
467 | { | |
468 | return NULL; | |
469 | } | |
470 | ||
ca304b61 ACM |
471 | static inline struct inet6_request_sock * |
472 | inet6_rsk(const struct request_sock *rsk) | |
473 | { | |
474 | return NULL; | |
475 | } | |
476 | ||
1da177e4 LT |
477 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
478 | { | |
479 | return NULL; | |
480 | } | |
481 | ||
0fa1a53e ACM |
482 | #define __inet6_rcv_saddr(__sk) NULL |
483 | #define inet6_rcv_saddr(__sk) NULL | |
8feaf0c0 | 484 | #define tcp_twsk_ipv6only(__sk) 0 |
463c84b9 | 485 | #define inet_v6_ipv6only(__sk) 0 |
8feaf0c0 | 486 | #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */ |
1da177e4 | 487 | |
d86e0dac | 488 | #define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\ |
3b1e0a65 | 489 | (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \ |
4f765d84 | 490 | ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports)) && \ |
8feaf0c0 ACM |
491 | ((__sk)->sk_family == AF_INET6) && \ |
492 | ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \ | |
493 | ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \ | |
494 | (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif)))) | |
1da177e4 | 495 | |
d86e0dac | 496 | #define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \ |
3b1e0a65 | 497 | (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \ |
535174ef PE |
498 | (*((__portpair *)&(inet_twsk(__sk)->tw_dport)) == (__ports)) && \ |
499 | ((__sk)->sk_family == PF_INET6) && \ | |
500 | (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr))) && \ | |
501 | (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr))) && \ | |
502 | (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif)))) | |
503 | ||
8feaf0c0 ACM |
504 | #endif /* __KERNEL__ */ |
505 | ||
506 | #endif /* _IPV6_H */ |