5 #include <asm/byteorder.h>
7 /* The latest drafts declared increase in minimal mtu up to 1280. */
9 #define IPV6_MIN_MTU 1280
13 * source interface/address selection, source routing, etc...
14 * *under construction*
19 struct in6_addr ipi6_addr
;
25 struct in6_addr ifr6_addr
;
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 #define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
45 * variable length field
54 * TLV encoded option data follows.
58 #define ipv6_destopt_hdr ipv6_opt_hdr
59 #define ipv6_hopopt_hdr ipv6_opt_hdr
62 #define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
66 * routing header type 0 (used in cmsghdr struct)
70 struct ipv6_rt_hdr rt_hdr
;
72 struct in6_addr addr
[0];
74 #define rt0_type rt_hdr.type
78 * routing header type 2
82 struct ipv6_rt_hdr rt_hdr
;
86 #define rt2_type rt_hdr.type
90 * home address option in destination options header
93 struct ipv6_destopt_hao
{
97 } __attribute__ ((__packed__
));
99 struct ipv6_auth_hdr
{
101 __u8 hdrlen
; /* This one is measured in 32 bit units! */
104 __be32 seq_no
; /* Sequence number */
105 __u8 auth_data
[0]; /* Length variable but >=4. Mind the 64 bit alignment! */
108 struct ipv6_esp_hdr
{
110 __be32 seq_no
; /* Sequence number */
111 __u8 enc_data
[0]; /* Length variable but >=8. Mind the 64 bit alignment! */
114 struct ipv6_comp_hdr
{
123 * BEWARE, it is incorrect. The first 4 bits of flow_lbl
124 * are glued to priority now, forming "class".
128 #if defined(__LITTLE_ENDIAN_BITFIELD)
131 #elif defined(__BIG_ENDIAN_BITFIELD)
135 #error "Please fix <asm/byteorder.h>"
143 struct in6_addr saddr
;
144 struct in6_addr daddr
;
149 * This structure contains configuration options per IPv6 link.
151 struct ipv6_devconf
{
156 __s32 accept_redirects
;
160 __s32 rtr_solicit_interval
;
161 __s32 rtr_solicit_delay
;
162 __s32 force_mld_version
;
163 #ifdef CONFIG_IPV6_PRIVACY
165 __s32 temp_valid_lft
;
166 __s32 temp_prefered_lft
;
167 __s32 regen_max_retry
;
168 __s32 max_desync_factor
;
171 __s32 accept_ra_defrtr
;
172 __s32 accept_ra_pinfo
;
173 #ifdef CONFIG_IPV6_ROUTER_PREF
174 __s32 accept_ra_rtr_pref
;
175 __s32 rtr_probe_interval
;
176 #ifdef CONFIG_IPV6_ROUTE_INFO
177 __s32 accept_ra_rt_info_max_plen
;
181 __s32 accept_source_route
;
182 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
183 __s32 optimistic_dad
;
185 #ifdef CONFIG_IPV6_MROUTE
196 extern struct ipv6_params ipv6_defaults
;
199 /* index values for the variables in ipv6_devconf */
201 DEVCONF_FORWARDING
= 0,
205 DEVCONF_ACCEPT_REDIRECTS
,
207 DEVCONF_DAD_TRANSMITS
,
208 DEVCONF_RTR_SOLICITS
,
209 DEVCONF_RTR_SOLICIT_INTERVAL
,
210 DEVCONF_RTR_SOLICIT_DELAY
,
211 DEVCONF_USE_TEMPADDR
,
212 DEVCONF_TEMP_VALID_LFT
,
213 DEVCONF_TEMP_PREFERED_LFT
,
214 DEVCONF_REGEN_MAX_RETRY
,
215 DEVCONF_MAX_DESYNC_FACTOR
,
216 DEVCONF_MAX_ADDRESSES
,
217 DEVCONF_FORCE_MLD_VERSION
,
218 DEVCONF_ACCEPT_RA_DEFRTR
,
219 DEVCONF_ACCEPT_RA_PINFO
,
220 DEVCONF_ACCEPT_RA_RTR_PREF
,
221 DEVCONF_RTR_PROBE_INTERVAL
,
222 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
,
224 DEVCONF_OPTIMISTIC_DAD
,
225 DEVCONF_ACCEPT_SOURCE_ROUTE
,
226 DEVCONF_MC_FORWARDING
,
227 DEVCONF_DISABLE_IPV6
,
232 #include <linux/icmpv6.h>
233 #include <linux/tcp.h>
234 #include <linux/udp.h>
236 #include <net/if_inet6.h> /* struct ipv6_mc_socklist */
237 #include <net/inet_sock.h>
239 static inline struct ipv6hdr
*ipv6_hdr(const struct sk_buff
*skb
)
241 return (struct ipv6hdr
*)skb_network_header(skb
);
244 static inline struct ipv6hdr
*ipipv6_hdr(const struct sk_buff
*skb
)
246 return (struct ipv6hdr
*)skb_transport_header(skb
);
250 This structure contains results of exthdrs parsing
251 as offsets from skb->nh.
254 struct inet6_skb_parm
{
264 #ifdef CONFIG_IPV6_MIP6
268 #define IP6SKB_XFRM_TRANSFORMED 1
269 #define IP6SKB_FORWARDED 2
272 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
274 static inline int inet6_iif(const struct sk_buff
*skb
)
276 return IP6CB(skb
)->iif
;
279 struct inet6_request_sock
{
280 struct in6_addr loc_addr
;
281 struct in6_addr rmt_addr
;
282 struct sk_buff
*pktopts
;
286 struct tcp6_request_sock
{
287 struct tcp_request_sock tcp6rsk_tcp
;
288 struct inet6_request_sock tcp6rsk_inet6
;
292 * struct ipv6_pinfo - ipv6 private area
294 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
295 * this _must_ be the last member, so that inet6_sk_generic
296 * is able to calculate its offset from the base struct sock
297 * by using the struct proto->slab_obj_size member. -acme
300 struct in6_addr saddr
;
301 struct in6_addr rcv_saddr
;
302 struct in6_addr daddr
;
303 struct in6_addr
*daddr_cache
;
304 #ifdef CONFIG_IPV6_SUBTREES
305 struct in6_addr
*saddr_cache
;
314 /* pktoption flags */
343 struct ipv6_mc_socklist
*ipv6_mc_list
;
344 struct ipv6_ac_socklist
*ipv6_ac_list
;
345 struct ipv6_fl_socklist
*ipv6_fl_list
;
347 struct ipv6_txoptions
*opt
;
348 struct sk_buff
*pktoptions
;
350 struct ipv6_txoptions
*opt
;
357 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
359 /* inet_sock has to be the first member of raw6_sock */
360 struct inet_sock inet
;
361 __u32 checksum
; /* perform checksum */
362 __u32 offset
; /* checksum offset */
363 struct icmp6_filter filter
;
364 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
365 struct ipv6_pinfo inet6
;
370 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
371 struct ipv6_pinfo inet6
;
376 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
377 struct ipv6_pinfo inet6
;
380 extern int inet6_sk_rebuild_header(struct sock
*sk
);
382 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
383 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
385 return inet_sk(__sk
)->pinet6
;
388 static inline struct inet6_request_sock
*
389 inet6_rsk(const struct request_sock
*rsk
)
391 return (struct inet6_request_sock
*)(((u8
*)rsk
) +
392 inet_rsk(rsk
)->inet6_rsk_offset
);
395 static inline u32
inet6_rsk_offset(struct request_sock
*rsk
)
397 return rsk
->rsk_ops
->obj_size
- sizeof(struct inet6_request_sock
);
400 static inline struct request_sock
*inet6_reqsk_alloc(struct request_sock_ops
*ops
)
402 struct request_sock
*req
= reqsk_alloc(ops
);
405 inet_rsk(req
)->inet6_rsk_offset
= inet6_rsk_offset(req
);
410 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
412 return (struct raw6_sock
*)sk
;
415 static inline void inet_sk_copy_descendant(struct sock
*sk_to
,
416 const struct sock
*sk_from
)
418 int ancestor_size
= sizeof(struct inet_sock
);
420 if (sk_from
->sk_family
== PF_INET6
)
421 ancestor_size
+= sizeof(struct ipv6_pinfo
);
423 __inet_sk_copy_descendant(sk_to
, sk_from
, ancestor_size
);
426 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
427 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
429 struct inet6_timewait_sock
{
430 struct in6_addr tw_v6_daddr
;
431 struct in6_addr tw_v6_rcv_saddr
;
434 struct tcp6_timewait_sock
{
435 struct tcp_timewait_sock tcp6tw_tcp
;
436 struct inet6_timewait_sock tcp6tw_inet6
;
439 static inline u16
inet6_tw_offset(const struct proto
*prot
)
441 return prot
->twsk_prot
->twsk_obj_size
-
442 sizeof(struct inet6_timewait_sock
);
445 static inline struct inet6_timewait_sock
*inet6_twsk(const struct sock
*sk
)
447 return (struct inet6_timewait_sock
*)(((u8
*)sk
) +
448 inet_twsk(sk
)->tw_ipv6_offset
);
451 static inline struct in6_addr
*__inet6_rcv_saddr(const struct sock
*sk
)
453 return likely(sk
->sk_state
!= TCP_TIME_WAIT
) ?
454 &inet6_sk(sk
)->rcv_saddr
: &inet6_twsk(sk
)->tw_v6_rcv_saddr
;
457 static inline struct in6_addr
*inet6_rcv_saddr(const struct sock
*sk
)
459 return sk
->sk_family
== AF_INET6
? __inet6_rcv_saddr(sk
) : NULL
;
462 static inline int inet_v6_ipv6only(const struct sock
*sk
)
464 return likely(sk
->sk_state
!= TCP_TIME_WAIT
) ?
465 ipv6_only_sock(sk
) : inet_twsk(sk
)->tw_ipv6only
;
468 #define __ipv6_only_sock(sk) 0
469 #define ipv6_only_sock(sk) 0
471 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
476 static inline struct inet6_request_sock
*
477 inet6_rsk(const struct request_sock
*rsk
)
482 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
487 #define __inet6_rcv_saddr(__sk) NULL
488 #define inet6_rcv_saddr(__sk) NULL
489 #define tcp_twsk_ipv6only(__sk) 0
490 #define inet_v6_ipv6only(__sk) 0
491 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
493 #define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\
494 (((__sk)->sk_hash == (__hash)) && \
495 ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports)) && \
496 ((__sk)->sk_family == AF_INET6) && \
497 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
498 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
499 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
501 #endif /* __KERNEL__ */