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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 | ||
1da177e4 LT |
89 | struct ipv6_auth_hdr { |
90 | __u8 nexthdr; | |
91 | __u8 hdrlen; /* This one is measured in 32 bit units! */ | |
92 | __u16 reserved; | |
93 | __u32 spi; | |
94 | __u32 seq_no; /* Sequence number */ | |
95 | __u8 auth_data[0]; /* Length variable but >=4. Mind the 64 bit alignment! */ | |
96 | }; | |
97 | ||
98 | struct ipv6_esp_hdr { | |
99 | __u32 spi; | |
100 | __u32 seq_no; /* Sequence number */ | |
101 | __u8 enc_data[0]; /* Length variable but >=8. Mind the 64 bit alignment! */ | |
102 | }; | |
103 | ||
104 | struct ipv6_comp_hdr { | |
105 | __u8 nexthdr; | |
106 | __u8 flags; | |
107 | __u16 cpi; | |
108 | }; | |
109 | ||
110 | /* | |
111 | * IPv6 fixed header | |
112 | * | |
113 | * BEWARE, it is incorrect. The first 4 bits of flow_lbl | |
114 | * are glued to priority now, forming "class". | |
115 | */ | |
116 | ||
117 | struct ipv6hdr { | |
118 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
119 | __u8 priority:4, | |
120 | version:4; | |
121 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
122 | __u8 version:4, | |
123 | priority:4; | |
124 | #else | |
125 | #error "Please fix <asm/byteorder.h>" | |
126 | #endif | |
127 | __u8 flow_lbl[3]; | |
128 | ||
129 | __u16 payload_len; | |
130 | __u8 nexthdr; | |
131 | __u8 hop_limit; | |
132 | ||
133 | struct in6_addr saddr; | |
134 | struct in6_addr daddr; | |
135 | }; | |
136 | ||
137 | /* | |
138 | * This structure contains configuration options per IPv6 link. | |
139 | */ | |
140 | struct ipv6_devconf { | |
141 | __s32 forwarding; | |
142 | __s32 hop_limit; | |
143 | __s32 mtu6; | |
144 | __s32 accept_ra; | |
145 | __s32 accept_redirects; | |
146 | __s32 autoconf; | |
147 | __s32 dad_transmits; | |
148 | __s32 rtr_solicits; | |
149 | __s32 rtr_solicit_interval; | |
150 | __s32 rtr_solicit_delay; | |
151 | __s32 force_mld_version; | |
152 | #ifdef CONFIG_IPV6_PRIVACY | |
153 | __s32 use_tempaddr; | |
154 | __s32 temp_valid_lft; | |
155 | __s32 temp_prefered_lft; | |
156 | __s32 regen_max_retry; | |
157 | __s32 max_desync_factor; | |
158 | #endif | |
159 | __s32 max_addresses; | |
65f5c7c1 | 160 | __s32 accept_ra_defrtr; |
c4fd30eb | 161 | __s32 accept_ra_pinfo; |
930d6ff2 YH |
162 | #ifdef CONFIG_IPV6_ROUTER_PREF |
163 | __s32 accept_ra_rtr_pref; | |
52e16356 | 164 | __s32 rtr_probe_interval; |
09c884d4 YH |
165 | #ifdef CONFIG_IPV6_ROUTE_INFO |
166 | __s32 accept_ra_rt_info_max_plen; | |
167 | #endif | |
930d6ff2 | 168 | #endif |
1da177e4 LT |
169 | void *sysctl; |
170 | }; | |
171 | ||
172 | /* index values for the variables in ipv6_devconf */ | |
173 | enum { | |
174 | DEVCONF_FORWARDING = 0, | |
175 | DEVCONF_HOPLIMIT, | |
176 | DEVCONF_MTU6, | |
177 | DEVCONF_ACCEPT_RA, | |
178 | DEVCONF_ACCEPT_REDIRECTS, | |
179 | DEVCONF_AUTOCONF, | |
180 | DEVCONF_DAD_TRANSMITS, | |
181 | DEVCONF_RTR_SOLICITS, | |
182 | DEVCONF_RTR_SOLICIT_INTERVAL, | |
183 | DEVCONF_RTR_SOLICIT_DELAY, | |
184 | DEVCONF_USE_TEMPADDR, | |
185 | DEVCONF_TEMP_VALID_LFT, | |
186 | DEVCONF_TEMP_PREFERED_LFT, | |
187 | DEVCONF_REGEN_MAX_RETRY, | |
188 | DEVCONF_MAX_DESYNC_FACTOR, | |
189 | DEVCONF_MAX_ADDRESSES, | |
190 | DEVCONF_FORCE_MLD_VERSION, | |
65f5c7c1 | 191 | DEVCONF_ACCEPT_RA_DEFRTR, |
c4fd30eb | 192 | DEVCONF_ACCEPT_RA_PINFO, |
930d6ff2 | 193 | DEVCONF_ACCEPT_RA_RTR_PREF, |
52e16356 | 194 | DEVCONF_RTR_PROBE_INTERVAL, |
09c884d4 | 195 | DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN, |
1da177e4 LT |
196 | DEVCONF_MAX |
197 | }; | |
198 | ||
199 | #ifdef __KERNEL__ | |
1da177e4 | 200 | #include <linux/icmpv6.h> |
1da177e4 LT |
201 | #include <linux/tcp.h> |
202 | #include <linux/udp.h> | |
203 | ||
14c85021 ACM |
204 | #include <net/if_inet6.h> /* struct ipv6_mc_socklist */ |
205 | #include <net/inet_sock.h> | |
206 | ||
1da177e4 LT |
207 | /* |
208 | This structure contains results of exthdrs parsing | |
209 | as offsets from skb->nh. | |
210 | */ | |
211 | ||
212 | struct inet6_skb_parm { | |
213 | int iif; | |
214 | __u16 ra; | |
215 | __u16 hop; | |
216 | __u16 dst0; | |
217 | __u16 srcrt; | |
218 | __u16 dst1; | |
333fad53 | 219 | __u16 lastopt; |
951dbc8a | 220 | __u32 nhoff; |
3e3850e9 PM |
221 | __u16 flags; |
222 | ||
223 | #define IP6SKB_XFRM_TRANSFORMED 1 | |
1da177e4 LT |
224 | }; |
225 | ||
226 | #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) | |
227 | ||
505cbfc5 ACM |
228 | static inline int inet6_iif(const struct sk_buff *skb) |
229 | { | |
230 | return IP6CB(skb)->iif; | |
231 | } | |
232 | ||
ca304b61 | 233 | struct inet6_request_sock { |
2e6599cb ACM |
234 | struct in6_addr loc_addr; |
235 | struct in6_addr rmt_addr; | |
236 | struct sk_buff *pktopts; | |
237 | int iif; | |
238 | }; | |
239 | ||
ca304b61 ACM |
240 | struct tcp6_request_sock { |
241 | struct tcp_request_sock tcp6rsk_tcp; | |
242 | struct inet6_request_sock tcp6rsk_inet6; | |
243 | }; | |
2e6599cb | 244 | |
1da177e4 LT |
245 | /** |
246 | * struct ipv6_pinfo - ipv6 private area | |
247 | * | |
248 | * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc) | |
249 | * this _must_ be the last member, so that inet6_sk_generic | |
250 | * is able to calculate its offset from the base struct sock | |
251 | * by using the struct proto->slab_obj_size member. -acme | |
252 | */ | |
253 | struct ipv6_pinfo { | |
254 | struct in6_addr saddr; | |
255 | struct in6_addr rcv_saddr; | |
256 | struct in6_addr daddr; | |
257 | struct in6_addr *daddr_cache; | |
8e1ef0a9 YH |
258 | #ifdef CONFIG_IPV6_SUBTREES |
259 | struct in6_addr *saddr_cache; | |
260 | #endif | |
1da177e4 LT |
261 | |
262 | __u32 flow_label; | |
263 | __u32 frag_size; | |
264 | __s16 hop_limit; | |
265 | __s16 mcast_hops; | |
266 | int mcast_oif; | |
267 | ||
268 | /* pktoption flags */ | |
269 | union { | |
270 | struct { | |
333fad53 YH |
271 | __u16 srcrt:2, |
272 | osrcrt:2, | |
1da177e4 | 273 | rxinfo:1, |
333fad53 | 274 | rxoinfo:1, |
1da177e4 | 275 | rxhlim:1, |
333fad53 | 276 | rxohlim:1, |
1da177e4 | 277 | hopopts:1, |
333fad53 | 278 | ohopopts:1, |
1da177e4 | 279 | dstopts:1, |
333fad53 | 280 | odstopts:1, |
41a1f8ea YH |
281 | rxflow:1, |
282 | rxtclass:1; | |
1da177e4 | 283 | } bits; |
333fad53 | 284 | __u16 all; |
1da177e4 LT |
285 | } rxopt; |
286 | ||
287 | /* sockopt flags */ | |
288 | __u8 mc_loop:1, | |
289 | recverr:1, | |
290 | sndflow:1, | |
291 | pmtudisc:2, | |
292 | ipv6only:1; | |
41a1f8ea | 293 | __u8 tclass; |
1da177e4 LT |
294 | |
295 | __u32 dst_cookie; | |
296 | ||
297 | struct ipv6_mc_socklist *ipv6_mc_list; | |
298 | struct ipv6_ac_socklist *ipv6_ac_list; | |
299 | struct ipv6_fl_socklist *ipv6_fl_list; | |
300 | ||
301 | struct ipv6_txoptions *opt; | |
302 | struct sk_buff *pktoptions; | |
303 | struct { | |
304 | struct ipv6_txoptions *opt; | |
305 | struct rt6_info *rt; | |
306 | int hop_limit; | |
41a1f8ea | 307 | int tclass; |
1da177e4 LT |
308 | } cork; |
309 | }; | |
310 | ||
311 | /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ | |
312 | struct raw6_sock { | |
313 | /* inet_sock has to be the first member of raw6_sock */ | |
314 | struct inet_sock inet; | |
315 | __u32 checksum; /* perform checksum */ | |
316 | __u32 offset; /* checksum offset */ | |
317 | struct icmp6_filter filter; | |
318 | /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */ | |
319 | struct ipv6_pinfo inet6; | |
320 | }; | |
321 | ||
322 | struct udp6_sock { | |
323 | struct udp_sock udp; | |
324 | /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */ | |
325 | struct ipv6_pinfo inet6; | |
326 | }; | |
327 | ||
328 | struct tcp6_sock { | |
329 | struct tcp_sock tcp; | |
330 | /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */ | |
331 | struct ipv6_pinfo inet6; | |
332 | }; | |
333 | ||
b9750ce1 ACM |
334 | extern int inet6_sk_rebuild_header(struct sock *sk); |
335 | ||
1da177e4 LT |
336 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
337 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) | |
338 | { | |
339 | return inet_sk(__sk)->pinet6; | |
340 | } | |
341 | ||
ca304b61 ACM |
342 | static inline struct inet6_request_sock * |
343 | inet6_rsk(const struct request_sock *rsk) | |
344 | { | |
345 | return (struct inet6_request_sock *)(((u8 *)rsk) + | |
346 | inet_rsk(rsk)->inet6_rsk_offset); | |
347 | } | |
348 | ||
349 | static inline u32 inet6_rsk_offset(struct request_sock *rsk) | |
350 | { | |
351 | return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock); | |
352 | } | |
353 | ||
354 | static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops) | |
355 | { | |
356 | struct request_sock *req = reqsk_alloc(ops); | |
357 | ||
358 | if (req != NULL) | |
359 | inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req); | |
360 | ||
361 | return req; | |
362 | } | |
363 | ||
1da177e4 LT |
364 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
365 | { | |
366 | return (struct raw6_sock *)sk; | |
367 | } | |
368 | ||
369 | static inline void inet_sk_copy_descendant(struct sock *sk_to, | |
370 | const struct sock *sk_from) | |
371 | { | |
372 | int ancestor_size = sizeof(struct inet_sock); | |
373 | ||
374 | if (sk_from->sk_family == PF_INET6) | |
375 | ancestor_size += sizeof(struct ipv6_pinfo); | |
376 | ||
377 | __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size); | |
378 | } | |
379 | ||
380 | #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only) | |
381 | #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk)) | |
8feaf0c0 | 382 | |
0fa1a53e ACM |
383 | struct inet6_timewait_sock { |
384 | struct in6_addr tw_v6_daddr; | |
385 | struct in6_addr tw_v6_rcv_saddr; | |
386 | }; | |
387 | ||
8feaf0c0 | 388 | struct tcp6_timewait_sock { |
0fa1a53e ACM |
389 | struct tcp_timewait_sock tcp6tw_tcp; |
390 | struct inet6_timewait_sock tcp6tw_inet6; | |
8feaf0c0 ACM |
391 | }; |
392 | ||
0fa1a53e ACM |
393 | static inline u16 inet6_tw_offset(const struct proto *prot) |
394 | { | |
6d6ee43e ACM |
395 | return prot->twsk_prot->twsk_obj_size - |
396 | sizeof(struct inet6_timewait_sock); | |
0fa1a53e ACM |
397 | } |
398 | ||
399 | static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk) | |
8feaf0c0 | 400 | { |
0fa1a53e ACM |
401 | return (struct inet6_timewait_sock *)(((u8 *)sk) + |
402 | inet_twsk(sk)->tw_ipv6_offset); | |
8feaf0c0 ACM |
403 | } |
404 | ||
0fa1a53e | 405 | static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk) |
8feaf0c0 ACM |
406 | { |
407 | return likely(sk->sk_state != TCP_TIME_WAIT) ? | |
0fa1a53e | 408 | &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr; |
8feaf0c0 ACM |
409 | } |
410 | ||
0fa1a53e | 411 | static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk) |
8feaf0c0 | 412 | { |
0fa1a53e | 413 | return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL; |
8feaf0c0 ACM |
414 | } |
415 | ||
463c84b9 | 416 | static inline int inet_v6_ipv6only(const struct sock *sk) |
8feaf0c0 ACM |
417 | { |
418 | return likely(sk->sk_state != TCP_TIME_WAIT) ? | |
3f421baa | 419 | ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only; |
8feaf0c0 | 420 | } |
1da177e4 LT |
421 | #else |
422 | #define __ipv6_only_sock(sk) 0 | |
423 | #define ipv6_only_sock(sk) 0 | |
424 | ||
425 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) | |
426 | { | |
427 | return NULL; | |
428 | } | |
429 | ||
ca304b61 ACM |
430 | static inline struct inet6_request_sock * |
431 | inet6_rsk(const struct request_sock *rsk) | |
432 | { | |
433 | return NULL; | |
434 | } | |
435 | ||
1da177e4 LT |
436 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
437 | { | |
438 | return NULL; | |
439 | } | |
440 | ||
0fa1a53e ACM |
441 | #define __inet6_rcv_saddr(__sk) NULL |
442 | #define inet6_rcv_saddr(__sk) NULL | |
8feaf0c0 | 443 | #define tcp_twsk_ipv6only(__sk) 0 |
463c84b9 | 444 | #define inet_v6_ipv6only(__sk) 0 |
8feaf0c0 | 445 | #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */ |
1da177e4 | 446 | |
81c3d547 ED |
447 | #define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\ |
448 | (((__sk)->sk_hash == (__hash)) && \ | |
449 | ((*((__u32 *)&(inet_sk(__sk)->dport))) == (__ports)) && \ | |
8feaf0c0 ACM |
450 | ((__sk)->sk_family == AF_INET6) && \ |
451 | ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \ | |
452 | ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \ | |
453 | (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif)))) | |
1da177e4 | 454 | |
8feaf0c0 ACM |
455 | #endif /* __KERNEL__ */ |
456 | ||
457 | #endif /* _IPV6_H */ |