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