4 #include <linux/types.h>
6 #include <asm/byteorder.h>
8 /* The latest drafts declared increase in minimal mtu up to 1280. */
10 #define IPV6_MIN_MTU 1280
14 * source interface/address selection, source routing, etc...
15 * *under construction*
20 struct in6_addr ipi6_addr
;
25 struct sockaddr_in6 ip6m_addr
;
30 struct in6_addr ifr6_addr
;
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 */
50 * variable length field
59 * TLV encoded option data follows.
61 } __attribute__ ((packed
)); /* required for some archs */
63 #define ipv6_destopt_hdr ipv6_opt_hdr
64 #define ipv6_hopopt_hdr ipv6_opt_hdr
67 #define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
71 * routing header type 0 (used in cmsghdr struct)
75 struct ipv6_rt_hdr rt_hdr
;
77 struct in6_addr addr
[0];
79 #define rt0_type rt_hdr.type
83 * routing header type 2
87 struct ipv6_rt_hdr rt_hdr
;
91 #define rt2_type rt_hdr.type
95 * home address option in destination options header
98 struct ipv6_destopt_hao
{
101 struct in6_addr addr
;
102 } __attribute__ ((__packed__
));
107 * BEWARE, it is incorrect. The first 4 bits of flow_lbl
108 * are glued to priority now, forming "class".
112 #if defined(__LITTLE_ENDIAN_BITFIELD)
115 #elif defined(__BIG_ENDIAN_BITFIELD)
119 #error "Please fix <asm/byteorder.h>"
127 struct in6_addr saddr
;
128 struct in6_addr daddr
;
133 * This structure contains configuration options per IPv6 link.
135 struct ipv6_devconf
{
140 __s32 accept_redirects
;
144 __s32 rtr_solicit_interval
;
145 __s32 rtr_solicit_delay
;
146 __s32 force_mld_version
;
147 #ifdef CONFIG_IPV6_PRIVACY
149 __s32 temp_valid_lft
;
150 __s32 temp_prefered_lft
;
151 __s32 regen_max_retry
;
152 __s32 max_desync_factor
;
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
;
165 __s32 accept_source_route
;
166 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
167 __s32 optimistic_dad
;
169 #ifdef CONFIG_IPV6_MROUTE
182 extern struct ipv6_params ipv6_defaults
;
185 /* index values for the variables in ipv6_devconf */
187 DEVCONF_FORWARDING
= 0,
191 DEVCONF_ACCEPT_REDIRECTS
,
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
,
210 DEVCONF_OPTIMISTIC_DAD
,
211 DEVCONF_ACCEPT_SOURCE_ROUTE
,
212 DEVCONF_MC_FORWARDING
,
213 DEVCONF_DISABLE_IPV6
,
220 #include <linux/icmpv6.h>
221 #include <linux/tcp.h>
222 #include <linux/udp.h>
224 #include <net/inet_sock.h>
226 static inline struct ipv6hdr
*ipv6_hdr(const struct sk_buff
*skb
)
228 return (struct ipv6hdr
*)skb_network_header(skb
);
231 static inline struct ipv6hdr
*ipipv6_hdr(const struct sk_buff
*skb
)
233 return (struct ipv6hdr
*)skb_transport_header(skb
);
237 This structure contains results of exthdrs parsing
238 as offsets from skb->nh.
241 struct inet6_skb_parm
{
251 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
255 #define IP6SKB_XFRM_TRANSFORMED 1
256 #define IP6SKB_FORWARDED 2
257 #define IP6SKB_REROUTED 4
260 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
261 #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
263 static inline int inet6_iif(const struct sk_buff
*skb
)
265 return IP6CB(skb
)->iif
;
268 struct inet6_request_sock
{
269 struct in6_addr loc_addr
;
270 struct in6_addr rmt_addr
;
271 struct sk_buff
*pktopts
;
275 struct tcp6_request_sock
{
276 struct tcp_request_sock tcp6rsk_tcp
;
277 struct inet6_request_sock tcp6rsk_inet6
;
280 struct ipv6_mc_socklist
;
281 struct ipv6_ac_socklist
;
282 struct ipv6_fl_socklist
;
285 * struct ipv6_pinfo - ipv6 private area
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
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
;
307 * Omit one shift by by putting the signed field at MSB.
309 #if defined(__BIG_ENDIAN_BITFIELD)
317 #if defined(__BIG_ENDIAN_BITFIELD)
318 /* Packed in 16bits. */
329 /* pktoption flags */
354 srcprefs
:3, /* 001: prefer temporary address
355 * 010: prefer public address
356 * 100: prefer care-of address
365 struct ipv6_mc_socklist
*ipv6_mc_list
;
366 struct ipv6_ac_socklist
*ipv6_ac_list
;
367 struct ipv6_fl_socklist
*ipv6_fl_list
;
369 struct ipv6_txoptions
*opt
;
370 struct sk_buff
*pktoptions
;
371 struct sk_buff
*rxpmtu
;
373 struct ipv6_txoptions
*opt
;
379 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
381 /* inet_sock has to be the first member of raw6_sock */
382 struct inet_sock inet
;
383 __u32 checksum
; /* perform checksum */
384 __u32 offset
; /* checksum offset */
385 struct icmp6_filter filter
;
387 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
388 struct ipv6_pinfo inet6
;
393 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
394 struct ipv6_pinfo inet6
;
399 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
400 struct ipv6_pinfo inet6
;
403 extern int inet6_sk_rebuild_header(struct sock
*sk
);
405 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
406 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
408 return inet_sk(__sk
)->pinet6
;
411 static inline struct inet6_request_sock
*
412 inet6_rsk(const struct request_sock
*rsk
)
414 return (struct inet6_request_sock
*)(((u8
*)rsk
) +
415 inet_rsk(rsk
)->inet6_rsk_offset
);
418 static inline u32
inet6_rsk_offset(struct request_sock
*rsk
)
420 return rsk
->rsk_ops
->obj_size
- sizeof(struct inet6_request_sock
);
423 static inline struct request_sock
*inet6_reqsk_alloc(struct request_sock_ops
*ops
)
425 struct request_sock
*req
= reqsk_alloc(ops
);
428 inet_rsk(req
)->inet6_rsk_offset
= inet6_rsk_offset(req
);
429 inet6_rsk(req
)->pktopts
= NULL
;
435 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
437 return (struct raw6_sock
*)sk
;
440 static inline void inet_sk_copy_descendant(struct sock
*sk_to
,
441 const struct sock
*sk_from
)
443 int ancestor_size
= sizeof(struct inet_sock
);
445 if (sk_from
->sk_family
== PF_INET6
)
446 ancestor_size
+= sizeof(struct ipv6_pinfo
);
448 __inet_sk_copy_descendant(sk_to
, sk_from
, ancestor_size
);
451 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
452 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
454 struct inet6_timewait_sock
{
455 struct in6_addr tw_v6_daddr
;
456 struct in6_addr tw_v6_rcv_saddr
;
459 struct tcp6_timewait_sock
{
460 struct tcp_timewait_sock tcp6tw_tcp
;
461 struct inet6_timewait_sock tcp6tw_inet6
;
464 static inline u16
inet6_tw_offset(const struct proto
*prot
)
466 return prot
->twsk_prot
->twsk_obj_size
-
467 sizeof(struct inet6_timewait_sock
);
470 static inline struct inet6_timewait_sock
*inet6_twsk(const struct sock
*sk
)
472 return (struct inet6_timewait_sock
*)(((u8
*)sk
) +
473 inet_twsk(sk
)->tw_ipv6_offset
);
476 static inline struct in6_addr
*__inet6_rcv_saddr(const struct sock
*sk
)
478 return likely(sk
->sk_state
!= TCP_TIME_WAIT
) ?
479 &inet6_sk(sk
)->rcv_saddr
: &inet6_twsk(sk
)->tw_v6_rcv_saddr
;
482 static inline struct in6_addr
*inet6_rcv_saddr(const struct sock
*sk
)
484 return sk
->sk_family
== AF_INET6
? __inet6_rcv_saddr(sk
) : NULL
;
487 static inline int inet_v6_ipv6only(const struct sock
*sk
)
489 return likely(sk
->sk_state
!= TCP_TIME_WAIT
) ?
490 ipv6_only_sock(sk
) : inet_twsk(sk
)->tw_ipv6only
;
493 #define __ipv6_only_sock(sk) 0
494 #define ipv6_only_sock(sk) 0
496 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
501 static inline struct inet6_request_sock
*
502 inet6_rsk(const struct request_sock
*rsk
)
507 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
512 #define __inet6_rcv_saddr(__sk) NULL
513 #define inet6_rcv_saddr(__sk) NULL
514 #define tcp_twsk_ipv6only(__sk) 0
515 #define inet_v6_ipv6only(__sk) 0
516 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
518 #define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\
519 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
520 ((*((__portpair *)&(inet_sk(__sk)->inet_dport))) == (__ports)) && \
521 ((__sk)->sk_family == AF_INET6) && \
522 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
523 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
524 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
526 #define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \
527 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
528 (*((__portpair *)&(inet_twsk(__sk)->tw_dport)) == (__ports)) && \
529 ((__sk)->sk_family == PF_INET6) && \
530 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr))) && \
531 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr))) && \
532 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
534 #endif /* __KERNEL__ */