fed up with those stupid warnings
[mmotm.git] / include / linux / ipv6.h
blob56404251248c42969e83e15bc0d7ea67aa59c448
1 #ifndef _IPV6_H
2 #define _IPV6_H
4 #include <linux/types.h>
5 #include <linux/in6.h>
6 #include <asm/byteorder.h>
8 /* The latest drafts declared increase in minimal mtu up to 1280. */
10 #define IPV6_MIN_MTU 1280
13 * Advanced API
14 * source interface/address selection, source routing, etc...
15 * *under construction*
19 struct in6_pktinfo {
20 struct in6_addr ipi6_addr;
21 int ipi6_ifindex;
25 struct in6_ifreq {
26 struct in6_addr ifr6_addr;
27 __u32 ifr6_prefixlen;
28 int ifr6_ifindex;
31 #define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */
32 #define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */
33 #define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
36 * routing header
38 struct ipv6_rt_hdr {
39 __u8 nexthdr;
40 __u8 hdrlen;
41 __u8 type;
42 __u8 segments_left;
45 * type specific data
46 * variable length field
51 struct ipv6_opt_hdr {
52 __u8 nexthdr;
53 __u8 hdrlen;
54 /*
55 * TLV encoded option data follows.
57 } __attribute__ ((packed)); /* required for some archs */
59 #define ipv6_destopt_hdr ipv6_opt_hdr
60 #define ipv6_hopopt_hdr ipv6_opt_hdr
62 #ifdef __KERNEL__
63 #define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
64 #endif
67 * routing header type 0 (used in cmsghdr struct)
70 struct rt0_hdr {
71 struct ipv6_rt_hdr rt_hdr;
72 __u32 reserved;
73 struct in6_addr addr[0];
75 #define rt0_type rt_hdr.type
79 * routing header type 2
82 struct rt2_hdr {
83 struct ipv6_rt_hdr rt_hdr;
84 __u32 reserved;
85 struct in6_addr addr;
87 #define rt2_type rt_hdr.type
91 * home address option in destination options header
94 struct ipv6_destopt_hao {
95 __u8 type;
96 __u8 length;
97 struct in6_addr addr;
98 } __attribute__ ((__packed__));
101 * IPv6 fixed header
103 * BEWARE, it is incorrect. The first 4 bits of flow_lbl
104 * are glued to priority now, forming "class".
107 struct ipv6hdr {
108 #if defined(__LITTLE_ENDIAN_BITFIELD)
109 __u8 priority:4,
110 version:4;
111 #elif defined(__BIG_ENDIAN_BITFIELD)
112 __u8 version:4,
113 priority:4;
114 #else
115 #error "Please fix <asm/byteorder.h>"
116 #endif
117 __u8 flow_lbl[3];
119 __be16 payload_len;
120 __u8 nexthdr;
121 __u8 hop_limit;
123 struct in6_addr saddr;
124 struct in6_addr daddr;
127 #ifdef __KERNEL__
129 * This structure contains configuration options per IPv6 link.
131 struct ipv6_devconf {
132 __s32 forwarding;
133 __s32 hop_limit;
134 __s32 mtu6;
135 __s32 accept_ra;
136 __s32 accept_redirects;
137 __s32 autoconf;
138 __s32 dad_transmits;
139 __s32 rtr_solicits;
140 __s32 rtr_solicit_interval;
141 __s32 rtr_solicit_delay;
142 __s32 force_mld_version;
143 #ifdef CONFIG_IPV6_PRIVACY
144 __s32 use_tempaddr;
145 __s32 temp_valid_lft;
146 __s32 temp_prefered_lft;
147 __s32 regen_max_retry;
148 __s32 max_desync_factor;
149 #endif
150 __s32 max_addresses;
151 __s32 accept_ra_defrtr;
152 __s32 accept_ra_pinfo;
153 #ifdef CONFIG_IPV6_ROUTER_PREF
154 __s32 accept_ra_rtr_pref;
155 __s32 rtr_probe_interval;
156 #ifdef CONFIG_IPV6_ROUTE_INFO
157 __s32 accept_ra_rt_info_max_plen;
158 #endif
159 #endif
160 __s32 proxy_ndp;
161 __s32 accept_source_route;
162 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
163 __s32 optimistic_dad;
164 #endif
165 #ifdef CONFIG_IPV6_MROUTE
166 __s32 mc_forwarding;
167 #endif
168 __s32 disable_ipv6;
169 __s32 accept_dad;
170 __s32 force_tllao;
171 void *sysctl;
174 struct ipv6_params {
175 __s32 disable_ipv6;
176 __s32 autoconf;
178 extern struct ipv6_params ipv6_defaults;
179 #endif
181 /* index values for the variables in ipv6_devconf */
182 enum {
183 DEVCONF_FORWARDING = 0,
184 DEVCONF_HOPLIMIT,
185 DEVCONF_MTU6,
186 DEVCONF_ACCEPT_RA,
187 DEVCONF_ACCEPT_REDIRECTS,
188 DEVCONF_AUTOCONF,
189 DEVCONF_DAD_TRANSMITS,
190 DEVCONF_RTR_SOLICITS,
191 DEVCONF_RTR_SOLICIT_INTERVAL,
192 DEVCONF_RTR_SOLICIT_DELAY,
193 DEVCONF_USE_TEMPADDR,
194 DEVCONF_TEMP_VALID_LFT,
195 DEVCONF_TEMP_PREFERED_LFT,
196 DEVCONF_REGEN_MAX_RETRY,
197 DEVCONF_MAX_DESYNC_FACTOR,
198 DEVCONF_MAX_ADDRESSES,
199 DEVCONF_FORCE_MLD_VERSION,
200 DEVCONF_ACCEPT_RA_DEFRTR,
201 DEVCONF_ACCEPT_RA_PINFO,
202 DEVCONF_ACCEPT_RA_RTR_PREF,
203 DEVCONF_RTR_PROBE_INTERVAL,
204 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
205 DEVCONF_PROXY_NDP,
206 DEVCONF_OPTIMISTIC_DAD,
207 DEVCONF_ACCEPT_SOURCE_ROUTE,
208 DEVCONF_MC_FORWARDING,
209 DEVCONF_DISABLE_IPV6,
210 DEVCONF_ACCEPT_DAD,
211 DEVCONF_FORCE_TLLAO,
212 DEVCONF_MAX
215 #ifdef __KERNEL__
216 #include <linux/icmpv6.h>
217 #include <linux/tcp.h>
218 #include <linux/udp.h>
220 #include <net/inet_sock.h>
222 static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
224 return (struct ipv6hdr *)skb_network_header(skb);
227 static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
229 return (struct ipv6hdr *)skb_transport_header(skb);
233 This structure contains results of exthdrs parsing
234 as offsets from skb->nh.
237 struct inet6_skb_parm {
238 int iif;
239 __u16 ra;
240 __u16 hop;
241 __u16 dst0;
242 __u16 srcrt;
243 __u16 dst1;
244 __u16 lastopt;
245 __u32 nhoff;
246 __u16 flags;
247 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
248 __u16 dsthao;
249 #endif
251 #define IP6SKB_XFRM_TRANSFORMED 1
252 #define IP6SKB_FORWARDED 2
255 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
257 static inline int inet6_iif(const struct sk_buff *skb)
259 return IP6CB(skb)->iif;
262 struct inet6_request_sock {
263 struct in6_addr loc_addr;
264 struct in6_addr rmt_addr;
265 struct sk_buff *pktopts;
266 int iif;
269 struct tcp6_request_sock {
270 struct tcp_request_sock tcp6rsk_tcp;
271 struct inet6_request_sock tcp6rsk_inet6;
274 struct ipv6_mc_socklist;
275 struct ipv6_ac_socklist;
276 struct ipv6_fl_socklist;
279 * struct ipv6_pinfo - ipv6 private area
281 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
282 * this _must_ be the last member, so that inet6_sk_generic
283 * is able to calculate its offset from the base struct sock
284 * by using the struct proto->slab_obj_size member. -acme
286 struct ipv6_pinfo {
287 struct in6_addr saddr;
288 struct in6_addr rcv_saddr;
289 struct in6_addr daddr;
290 struct in6_pktinfo sticky_pktinfo;
291 struct in6_addr *daddr_cache;
292 #ifdef CONFIG_IPV6_SUBTREES
293 struct in6_addr *saddr_cache;
294 #endif
296 __be32 flow_label;
297 __u32 frag_size;
300 * Packed in 16bits.
301 * Omit one shift by by putting the signed field at MSB.
303 #if defined(__BIG_ENDIAN_BITFIELD)
304 __s16 hop_limit:9;
305 __u16 __unused_1:7;
306 #else
307 __u16 __unused_1:7;
308 __s16 hop_limit:9;
309 #endif
311 #if defined(__BIG_ENDIAN_BITFIELD)
312 /* Packed in 16bits. */
313 __s16 mcast_hops:9;
314 __u16 __unused_2:6,
315 mc_loop:1;
316 #else
317 __u16 mc_loop:1,
318 __unused_2:6;
319 __s16 mcast_hops:9;
320 #endif
321 int mcast_oif;
323 /* pktoption flags */
324 union {
325 struct {
326 __u16 srcrt:1,
327 osrcrt:1,
328 rxinfo:1,
329 rxoinfo:1,
330 rxhlim:1,
331 rxohlim:1,
332 hopopts:1,
333 ohopopts:1,
334 dstopts:1,
335 odstopts:1,
336 rxflow:1,
337 rxtclass:1;
338 } bits;
339 __u16 all;
340 } rxopt;
342 /* sockopt flags */
343 __u8 recverr:1,
344 sndflow:1,
345 pmtudisc:2,
346 ipv6only:1,
347 srcprefs:3; /* 001: prefer temporary address
348 * 010: prefer public address
349 * 100: prefer care-of address
351 __u8 tclass;
353 __u32 dst_cookie;
355 struct ipv6_mc_socklist *ipv6_mc_list;
356 struct ipv6_ac_socklist *ipv6_ac_list;
357 struct ipv6_fl_socklist *ipv6_fl_list;
359 struct ipv6_txoptions *opt;
360 struct sk_buff *pktoptions;
361 struct {
362 struct ipv6_txoptions *opt;
363 u8 hop_limit;
364 u8 tclass;
365 } cork;
368 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
369 struct raw6_sock {
370 /* inet_sock has to be the first member of raw6_sock */
371 struct inet_sock inet;
372 __u32 checksum; /* perform checksum */
373 __u32 offset; /* checksum offset */
374 struct icmp6_filter filter;
375 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
376 struct ipv6_pinfo inet6;
379 struct udp6_sock {
380 struct udp_sock udp;
381 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
382 struct ipv6_pinfo inet6;
385 struct tcp6_sock {
386 struct tcp_sock tcp;
387 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
388 struct ipv6_pinfo inet6;
391 extern int inet6_sk_rebuild_header(struct sock *sk);
393 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
394 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
396 return inet_sk(__sk)->pinet6;
399 static inline struct inet6_request_sock *
400 inet6_rsk(const struct request_sock *rsk)
402 return (struct inet6_request_sock *)(((u8 *)rsk) +
403 inet_rsk(rsk)->inet6_rsk_offset);
406 static inline u32 inet6_rsk_offset(struct request_sock *rsk)
408 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
411 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
413 struct request_sock *req = reqsk_alloc(ops);
415 if (req != NULL) {
416 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
417 inet6_rsk(req)->pktopts = NULL;
420 return req;
423 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
425 return (struct raw6_sock *)sk;
428 static inline void inet_sk_copy_descendant(struct sock *sk_to,
429 const struct sock *sk_from)
431 int ancestor_size = sizeof(struct inet_sock);
433 if (sk_from->sk_family == PF_INET6)
434 ancestor_size += sizeof(struct ipv6_pinfo);
436 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
439 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
440 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
442 struct inet6_timewait_sock {
443 struct in6_addr tw_v6_daddr;
444 struct in6_addr tw_v6_rcv_saddr;
447 struct tcp6_timewait_sock {
448 struct tcp_timewait_sock tcp6tw_tcp;
449 struct inet6_timewait_sock tcp6tw_inet6;
452 static inline u16 inet6_tw_offset(const struct proto *prot)
454 return prot->twsk_prot->twsk_obj_size -
455 sizeof(struct inet6_timewait_sock);
458 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
460 return (struct inet6_timewait_sock *)(((u8 *)sk) +
461 inet_twsk(sk)->tw_ipv6_offset);
464 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
466 return likely(sk->sk_state != TCP_TIME_WAIT) ?
467 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
470 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
472 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
475 static inline int inet_v6_ipv6only(const struct sock *sk)
477 return likely(sk->sk_state != TCP_TIME_WAIT) ?
478 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
480 #else
481 #define __ipv6_only_sock(sk) 0
482 #define ipv6_only_sock(sk) 0
484 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
486 return NULL;
489 static inline struct inet6_request_sock *
490 inet6_rsk(const struct request_sock *rsk)
492 return NULL;
495 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
497 return NULL;
500 #define __inet6_rcv_saddr(__sk) NULL
501 #define inet6_rcv_saddr(__sk) NULL
502 #define tcp_twsk_ipv6only(__sk) 0
503 #define inet_v6_ipv6only(__sk) 0
504 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
506 #define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\
507 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
508 ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports)) && \
509 ((__sk)->sk_family == AF_INET6) && \
510 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
511 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
512 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
514 #define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \
515 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
516 (*((__portpair *)&(inet_twsk(__sk)->tw_dport)) == (__ports)) && \
517 ((__sk)->sk_family == PF_INET6) && \
518 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr))) && \
519 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr))) && \
520 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
522 #endif /* __KERNEL__ */
524 #endif /* _IPV6_H */