power: tps80031: battery-charger: register as mfd sub device
[linux-2.6.git] / include / linux / ipv6.h
1 #ifndef _IPV6_H
2 #define _IPV6_H
3
4 #include <linux/types.h>
5 #include <linux/in6.h>
6 #include <asm/byteorder.h>
7
8 /* The latest drafts declared increase in minimal mtu up to 1280. */
9
10 #define IPV6_MIN_MTU    1280
11
12 /*
13  *      Advanced API
14  *      source interface/address selection, source routing, etc...
15  *      *under construction*
16  */
17
18
19 struct in6_pktinfo {
20         struct in6_addr ipi6_addr;
21         int             ipi6_ifindex;
22 };
23
24 struct ip6_mtuinfo {
25         struct sockaddr_in6     ip6m_addr;
26         __u32                   ip6m_mtu;
27 };
28
29 struct in6_ifreq {
30         struct in6_addr ifr6_addr;
31         __u32           ifr6_prefixlen;
32         int             ifr6_ifindex; 
33 };
34
35 #define IPV6_SRCRT_STRICT       0x01    /* Deprecated; will be removed */
36 #define IPV6_SRCRT_TYPE_0       0       /* Deprecated; will be removed */
37 #define IPV6_SRCRT_TYPE_2       2       /* IPv6 type 2 Routing Header   */
38
39 /*
40  *      routing header
41  */
42 struct ipv6_rt_hdr {
43         __u8            nexthdr;
44         __u8            hdrlen;
45         __u8            type;
46         __u8            segments_left;
47
48         /*
49          *      type specific data
50          *      variable length field
51          */
52 };
53
54
55 struct ipv6_opt_hdr {
56         __u8            nexthdr;
57         __u8            hdrlen;
58         /* 
59          * TLV encoded option data follows.
60          */
61 } __attribute__((packed));      /* required for some archs */
62
63 #define ipv6_destopt_hdr ipv6_opt_hdr
64 #define ipv6_hopopt_hdr  ipv6_opt_hdr
65
66 #ifdef __KERNEL__
67 #define ipv6_optlen(p)  (((p)->hdrlen+1) << 3)
68 #endif
69
70 /*
71  *      routing header type 0 (used in cmsghdr struct)
72  */
73
74 struct rt0_hdr {
75         struct ipv6_rt_hdr      rt_hdr;
76         __u32                   reserved;
77         struct in6_addr         addr[0];
78
79 #define rt0_type                rt_hdr.type
80 };
81
82 /*
83  *      routing header type 2
84  */
85
86 struct rt2_hdr {
87         struct ipv6_rt_hdr      rt_hdr;
88         __u32                   reserved;
89         struct in6_addr         addr;
90
91 #define rt2_type                rt_hdr.type
92 };
93
94 /*
95  *      home address option in destination options header
96  */
97
98 struct ipv6_destopt_hao {
99         __u8                    type;
100         __u8                    length;
101         struct in6_addr         addr;
102 } __attribute__((packed));
103
104 /*
105  *      IPv6 fixed header
106  *
107  *      BEWARE, it is incorrect. The first 4 bits of flow_lbl
108  *      are glued to priority now, forming "class".
109  */
110
111 struct ipv6hdr {
112 #if defined(__LITTLE_ENDIAN_BITFIELD)
113         __u8                    priority:4,
114                                 version:4;
115 #elif defined(__BIG_ENDIAN_BITFIELD)
116         __u8                    version:4,
117                                 priority:4;
118 #else
119 #error  "Please fix <asm/byteorder.h>"
120 #endif
121         __u8                    flow_lbl[3];
122
123         __be16                  payload_len;
124         __u8                    nexthdr;
125         __u8                    hop_limit;
126
127         struct  in6_addr        saddr;
128         struct  in6_addr        daddr;
129 };
130
131 #ifdef __KERNEL__
132 /*
133  * This structure contains configuration options per IPv6 link.
134  */
135 struct ipv6_devconf {
136         __s32           forwarding;
137         __s32           hop_limit;
138         __s32           mtu6;
139         __s32           accept_ra;
140         __s32           accept_redirects;
141         __s32           autoconf;
142         __s32           dad_transmits;
143         __s32           rtr_solicits;
144         __s32           rtr_solicit_interval;
145         __s32           rtr_solicit_delay;
146         __s32           force_mld_version;
147 #ifdef CONFIG_IPV6_PRIVACY
148         __s32           use_tempaddr;
149         __s32           temp_valid_lft;
150         __s32           temp_prefered_lft;
151         __s32           regen_max_retry;
152         __s32           max_desync_factor;
153 #endif
154         __s32           max_addresses;
155         __s32           accept_ra_defrtr;
156         __s32           accept_ra_pinfo;
157 #ifdef CONFIG_IPV6_ROUTER_PREF
158         __s32           accept_ra_rtr_pref;
159         __s32           rtr_probe_interval;
160 #ifdef CONFIG_IPV6_ROUTE_INFO
161         __s32           accept_ra_rt_info_max_plen;
162 #endif
163 #endif
164         __s32           proxy_ndp;
165         __s32           accept_source_route;
166 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
167         __s32           optimistic_dad;
168 #endif
169 #ifdef CONFIG_IPV6_MROUTE
170         __s32           mc_forwarding;
171 #endif
172         __s32           disable_ipv6;
173         __s32           accept_dad;
174         __s32           force_tllao;
175         void            *sysctl;
176 };
177
178 struct ipv6_params {
179         __s32 disable_ipv6;
180         __s32 autoconf;
181 };
182 extern struct ipv6_params ipv6_defaults;
183 #endif
184
185 /* index values for the variables in ipv6_devconf */
186 enum {
187         DEVCONF_FORWARDING = 0,
188         DEVCONF_HOPLIMIT,
189         DEVCONF_MTU6,
190         DEVCONF_ACCEPT_RA,
191         DEVCONF_ACCEPT_REDIRECTS,
192         DEVCONF_AUTOCONF,
193         DEVCONF_DAD_TRANSMITS,
194         DEVCONF_RTR_SOLICITS,
195         DEVCONF_RTR_SOLICIT_INTERVAL,
196         DEVCONF_RTR_SOLICIT_DELAY,
197         DEVCONF_USE_TEMPADDR,
198         DEVCONF_TEMP_VALID_LFT,
199         DEVCONF_TEMP_PREFERED_LFT,
200         DEVCONF_REGEN_MAX_RETRY,
201         DEVCONF_MAX_DESYNC_FACTOR,
202         DEVCONF_MAX_ADDRESSES,
203         DEVCONF_FORCE_MLD_VERSION,
204         DEVCONF_ACCEPT_RA_DEFRTR,
205         DEVCONF_ACCEPT_RA_PINFO,
206         DEVCONF_ACCEPT_RA_RTR_PREF,
207         DEVCONF_RTR_PROBE_INTERVAL,
208         DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
209         DEVCONF_PROXY_NDP,
210         DEVCONF_OPTIMISTIC_DAD,
211         DEVCONF_ACCEPT_SOURCE_ROUTE,
212         DEVCONF_MC_FORWARDING,
213         DEVCONF_DISABLE_IPV6,
214         DEVCONF_ACCEPT_DAD,
215         DEVCONF_FORCE_TLLAO,
216         DEVCONF_MAX
217 };
218
219 #ifdef __KERNEL__
220 #include <linux/icmpv6.h>
221 #include <linux/tcp.h>
222 #include <linux/udp.h>
223
224 #include <net/inet_sock.h>
225
226 static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
227 {
228         return (struct ipv6hdr *)skb_network_header(skb);
229 }
230
231 static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
232 {
233         return (struct ipv6hdr *)skb_transport_header(skb);
234 }
235
236 /* 
237    This structure contains results of exthdrs parsing
238    as offsets from skb->nh.
239  */
240
241 struct inet6_skb_parm {
242         int                     iif;
243         __u16                   ra;
244         __u16                   hop;
245         __u16                   dst0;
246         __u16                   srcrt;
247         __u16                   dst1;
248         __u16                   lastopt;
249         __u16                   nhoff;
250         __u16                   flags;
251 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
252         __u16                   dsthao;
253 #endif
254
255 #define IP6SKB_XFRM_TRANSFORMED 1
256 #define IP6SKB_FORWARDED        2
257 #define IP6SKB_REROUTED         4
258 };
259
260 #define IP6CB(skb)      ((struct inet6_skb_parm*)((skb)->cb))
261 #define IP6CBMTU(skb)   ((struct ip6_mtuinfo *)((skb)->cb))
262
263 static inline int inet6_iif(const struct sk_buff *skb)
264 {
265         return IP6CB(skb)->iif;
266 }
267
268 struct inet6_request_sock {
269         struct in6_addr         loc_addr;
270         struct in6_addr         rmt_addr;
271         struct sk_buff          *pktopts;
272         int                     iif;
273 };
274
275 struct tcp6_request_sock {
276         struct tcp_request_sock   tcp6rsk_tcp;
277         struct inet6_request_sock tcp6rsk_inet6;
278 };
279
280 struct ipv6_mc_socklist;
281 struct ipv6_ac_socklist;
282 struct ipv6_fl_socklist;
283
284 /**
285  * struct ipv6_pinfo - ipv6 private area
286  *
287  * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
288  * this _must_ be the last member, so that inet6_sk_generic
289  * is able to calculate its offset from the base struct sock
290  * by using the struct proto->slab_obj_size member. -acme
291  */
292 struct ipv6_pinfo {
293         struct in6_addr         saddr;
294         struct in6_addr         rcv_saddr;
295         struct in6_addr         daddr;
296         struct in6_pktinfo      sticky_pktinfo;
297         struct in6_addr         *daddr_cache;
298 #ifdef CONFIG_IPV6_SUBTREES
299         struct in6_addr         *saddr_cache;
300 #endif
301
302         __be32                  flow_label;
303         __u32                   frag_size;
304
305         /*
306          * Packed in 16bits.
307          * Omit one shift by by putting the signed field at MSB.
308          */
309 #if defined(__BIG_ENDIAN_BITFIELD)
310         __s16                   hop_limit:9;
311         __u16                   __unused_1:7;
312 #else
313         __u16                   __unused_1:7;
314         __s16                   hop_limit:9;
315 #endif
316
317 #if defined(__BIG_ENDIAN_BITFIELD)
318         /* Packed in 16bits. */
319         __s16                   mcast_hops:9;
320         __u16                   __unused_2:6,
321                                 mc_loop:1;
322 #else
323         __u16                   mc_loop:1,
324                                 __unused_2:6;
325         __s16                   mcast_hops:9;
326 #endif
327         int                     mcast_oif;
328
329         /* pktoption flags */
330         union {
331                 struct {
332                         __u16   srcrt:1,
333                                 osrcrt:1,
334                                 rxinfo:1,
335                                 rxoinfo:1,
336                                 rxhlim:1,
337                                 rxohlim:1,
338                                 hopopts:1,
339                                 ohopopts:1,
340                                 dstopts:1,
341                                 odstopts:1,
342                                 rxflow:1,
343                                 rxtclass:1,
344                                 rxpmtu:1,
345                                 rxorigdstaddr:1;
346                                 /* 2 bits hole */
347                 } bits;
348                 __u16           all;
349         } rxopt;
350
351         /* sockopt flags */
352         __u16                   recverr:1,
353                                 sndflow:1,
354                                 pmtudisc:2,
355                                 ipv6only:1,
356                                 srcprefs:3,     /* 001: prefer temporary address
357                                                  * 010: prefer public address
358                                                  * 100: prefer care-of address
359                                                  */
360                                 dontfrag:1;
361         __u8                    min_hopcount;
362         __u8                    tclass;
363         __u8                    padding;
364
365         __u32                   dst_cookie;
366
367         struct ipv6_mc_socklist __rcu *ipv6_mc_list;
368         struct ipv6_ac_socklist *ipv6_ac_list;
369         struct ipv6_fl_socklist *ipv6_fl_list;
370
371         struct ipv6_txoptions   *opt;
372         struct sk_buff          *pktoptions;
373         struct sk_buff          *rxpmtu;
374         struct {
375                 struct ipv6_txoptions *opt;
376                 u8 hop_limit;
377                 u8 tclass;
378         } cork;
379 };
380
381 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
382 struct raw6_sock {
383         /* inet_sock has to be the first member of raw6_sock */
384         struct inet_sock        inet;
385         __u32                   checksum;       /* perform checksum */
386         __u32                   offset;         /* checksum offset  */
387         struct icmp6_filter     filter;
388         __u32                   ip6mr_table;
389         /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
390         struct ipv6_pinfo       inet6;
391 };
392
393 struct udp6_sock {
394         struct udp_sock   udp;
395         /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
396         struct ipv6_pinfo inet6;
397 };
398
399 struct tcp6_sock {
400         struct tcp_sock   tcp;
401         /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
402         struct ipv6_pinfo inet6;
403 };
404
405 extern int inet6_sk_rebuild_header(struct sock *sk);
406
407 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
408 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
409 {
410         return inet_sk(__sk)->pinet6;
411 }
412
413 static inline struct inet6_request_sock *
414                         inet6_rsk(const struct request_sock *rsk)
415 {
416         return (struct inet6_request_sock *)(((u8 *)rsk) +
417                                              inet_rsk(rsk)->inet6_rsk_offset);
418 }
419
420 static inline u32 inet6_rsk_offset(struct request_sock *rsk)
421 {
422         return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
423 }
424
425 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
426 {
427         struct request_sock *req = reqsk_alloc(ops);
428
429         if (req != NULL) {
430                 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
431                 inet6_rsk(req)->pktopts = NULL;
432         }
433
434         return req;
435 }
436
437 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
438 {
439         return (struct raw6_sock *)sk;
440 }
441
442 static inline void inet_sk_copy_descendant(struct sock *sk_to,
443                                            const struct sock *sk_from)
444 {
445         int ancestor_size = sizeof(struct inet_sock);
446
447         if (sk_from->sk_family == PF_INET6)
448                 ancestor_size += sizeof(struct ipv6_pinfo);
449
450         __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
451 }
452
453 #define __ipv6_only_sock(sk)    (inet6_sk(sk)->ipv6only)
454 #define ipv6_only_sock(sk)      ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
455
456 struct inet6_timewait_sock {
457         struct in6_addr tw_v6_daddr;
458         struct in6_addr tw_v6_rcv_saddr;
459 };
460
461 struct tcp6_timewait_sock {
462         struct tcp_timewait_sock   tcp6tw_tcp;
463         struct inet6_timewait_sock tcp6tw_inet6;
464 };
465
466 static inline u16 inet6_tw_offset(const struct proto *prot)
467 {
468         return prot->twsk_prot->twsk_obj_size -
469                         sizeof(struct inet6_timewait_sock);
470 }
471
472 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
473 {
474         return (struct inet6_timewait_sock *)(((u8 *)sk) +
475                                               inet_twsk(sk)->tw_ipv6_offset);
476 }
477
478 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
479 {
480         return likely(sk->sk_state != TCP_TIME_WAIT) ?
481                 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
482 }
483
484 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
485 {
486         return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
487 }
488
489 static inline int inet_v6_ipv6only(const struct sock *sk)
490 {
491         return likely(sk->sk_state != TCP_TIME_WAIT) ?
492                 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
493 }
494 #else
495 #define __ipv6_only_sock(sk)    0
496 #define ipv6_only_sock(sk)      0
497
498 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
499 {
500         return NULL;
501 }
502
503 static inline struct inet6_request_sock *
504                         inet6_rsk(const struct request_sock *rsk)
505 {
506         return NULL;
507 }
508
509 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
510 {
511         return NULL;
512 }
513
514 #define __inet6_rcv_saddr(__sk) NULL
515 #define inet6_rcv_saddr(__sk)   NULL
516 #define tcp_twsk_ipv6only(__sk)         0
517 #define inet_v6_ipv6only(__sk)          0
518 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
519
520 #define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\
521         (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net)   && \
522          ((*((__portpair *)&(inet_sk(__sk)->inet_dport))) == (__ports)) && \
523          ((__sk)->sk_family             == AF_INET6)            && \
524          ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr))     && \
525          ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
526          (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
527
528 #define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \
529         (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net)   && \
530          (*((__portpair *)&(inet_twsk(__sk)->tw_dport)) == (__ports))   && \
531          ((__sk)->sk_family            == PF_INET6)                     && \
532          (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr)))   && \
533          (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr))) && \
534          (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
535
536 #endif /* __KERNEL__ */
537
538 #endif /* _IPV6_H */