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 /* Deprecated; will be removed */
31 #define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */
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
;
148 * This structure contains configuration options per IPv6 link.
150 struct ipv6_devconf
{
155 __s32 accept_redirects
;
159 __s32 rtr_solicit_interval
;
160 __s32 rtr_solicit_delay
;
161 __s32 force_mld_version
;
162 #ifdef CONFIG_IPV6_PRIVACY
164 __s32 temp_valid_lft
;
165 __s32 temp_prefered_lft
;
166 __s32 regen_max_retry
;
167 __s32 max_desync_factor
;
170 __s32 accept_ra_defrtr
;
171 __s32 accept_ra_pinfo
;
172 #ifdef CONFIG_IPV6_ROUTER_PREF
173 __s32 accept_ra_rtr_pref
;
174 __s32 rtr_probe_interval
;
175 #ifdef CONFIG_IPV6_ROUTE_INFO
176 __s32 accept_ra_rt_info_max_plen
;
180 __s32 accept_source_route
;
181 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
182 __s32 optimistic_dad
;
187 /* index values for the variables in ipv6_devconf */
189 DEVCONF_FORWARDING
= 0,
193 DEVCONF_ACCEPT_REDIRECTS
,
195 DEVCONF_DAD_TRANSMITS
,
196 DEVCONF_RTR_SOLICITS
,
197 DEVCONF_RTR_SOLICIT_INTERVAL
,
198 DEVCONF_RTR_SOLICIT_DELAY
,
199 DEVCONF_USE_TEMPADDR
,
200 DEVCONF_TEMP_VALID_LFT
,
201 DEVCONF_TEMP_PREFERED_LFT
,
202 DEVCONF_REGEN_MAX_RETRY
,
203 DEVCONF_MAX_DESYNC_FACTOR
,
204 DEVCONF_MAX_ADDRESSES
,
205 DEVCONF_FORCE_MLD_VERSION
,
206 DEVCONF_ACCEPT_RA_DEFRTR
,
207 DEVCONF_ACCEPT_RA_PINFO
,
208 DEVCONF_ACCEPT_RA_RTR_PREF
,
209 DEVCONF_RTR_PROBE_INTERVAL
,
210 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
,
212 DEVCONF_OPTIMISTIC_DAD
,
213 DEVCONF_ACCEPT_SOURCE_ROUTE
,
218 #include <linux/icmpv6.h>
219 #include <linux/tcp.h>
220 #include <linux/udp.h>
222 #include <net/inet_sock.h>
224 static inline struct ipv6hdr
*ipv6_hdr(const struct sk_buff
*skb
)
226 return (struct ipv6hdr
*)skb_network_header(skb
);
229 static inline struct ipv6hdr
*ipipv6_hdr(const struct sk_buff
*skb
)
231 return (struct ipv6hdr
*)skb_transport_header(skb
);
235 This structure contains results of exthdrs parsing
236 as offsets from skb->nh.
239 struct inet6_skb_parm
{
249 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
253 #define IP6SKB_XFRM_TRANSFORMED 1
256 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
258 static inline int inet6_iif(const struct sk_buff
*skb
)
260 return IP6CB(skb
)->iif
;
263 struct inet6_request_sock
{
264 struct in6_addr loc_addr
;
265 struct in6_addr rmt_addr
;
266 struct sk_buff
*pktopts
;
270 struct tcp6_request_sock
{
271 struct tcp_request_sock tcp6rsk_tcp
;
272 struct inet6_request_sock tcp6rsk_inet6
;
275 struct ipv6_mc_socklist
;
276 struct ipv6_ac_socklist
;
277 struct ipv6_fl_socklist
;
280 * struct ipv6_pinfo - ipv6 private area
282 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
283 * this _must_ be the last member, so that inet6_sk_generic
284 * is able to calculate its offset from the base struct sock
285 * by using the struct proto->slab_obj_size member. -acme
288 struct in6_addr saddr
;
289 struct in6_addr rcv_saddr
;
290 struct in6_addr daddr
;
291 struct in6_addr
*daddr_cache
;
292 #ifdef CONFIG_IPV6_SUBTREES
293 struct in6_addr
*saddr_cache
;
302 /* pktoption flags */
331 struct ipv6_mc_socklist
*ipv6_mc_list
;
332 struct ipv6_ac_socklist
*ipv6_ac_list
;
333 struct ipv6_fl_socklist
*ipv6_fl_list
;
335 struct ipv6_txoptions
*opt
;
336 struct sk_buff
*pktoptions
;
338 struct ipv6_txoptions
*opt
;
345 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
347 /* inet_sock has to be the first member of raw6_sock */
348 struct inet_sock inet
;
349 __u32 checksum
; /* perform checksum */
350 __u32 offset
; /* checksum offset */
351 struct icmp6_filter filter
;
352 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
353 struct ipv6_pinfo inet6
;
358 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
359 struct ipv6_pinfo inet6
;
364 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
365 struct ipv6_pinfo inet6
;
368 extern int inet6_sk_rebuild_header(struct sock
*sk
);
370 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
371 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
373 return inet_sk(__sk
)->pinet6
;
376 static inline struct inet6_request_sock
*
377 inet6_rsk(const struct request_sock
*rsk
)
379 return (struct inet6_request_sock
*)(((u8
*)rsk
) +
380 inet_rsk(rsk
)->inet6_rsk_offset
);
383 static inline u32
inet6_rsk_offset(struct request_sock
*rsk
)
385 return rsk
->rsk_ops
->obj_size
- sizeof(struct inet6_request_sock
);
388 static inline struct request_sock
*inet6_reqsk_alloc(struct request_sock_ops
*ops
)
390 struct request_sock
*req
= reqsk_alloc(ops
);
393 inet_rsk(req
)->inet6_rsk_offset
= inet6_rsk_offset(req
);
398 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
400 return (struct raw6_sock
*)sk
;
403 static inline void inet_sk_copy_descendant(struct sock
*sk_to
,
404 const struct sock
*sk_from
)
406 int ancestor_size
= sizeof(struct inet_sock
);
408 if (sk_from
->sk_family
== PF_INET6
)
409 ancestor_size
+= sizeof(struct ipv6_pinfo
);
411 __inet_sk_copy_descendant(sk_to
, sk_from
, ancestor_size
);
414 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
415 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
417 struct inet6_timewait_sock
{
418 struct in6_addr tw_v6_daddr
;
419 struct in6_addr tw_v6_rcv_saddr
;
422 struct tcp6_timewait_sock
{
423 struct tcp_timewait_sock tcp6tw_tcp
;
424 struct inet6_timewait_sock tcp6tw_inet6
;
427 static inline u16
inet6_tw_offset(const struct proto
*prot
)
429 return prot
->twsk_prot
->twsk_obj_size
-
430 sizeof(struct inet6_timewait_sock
);
433 static inline struct inet6_timewait_sock
*inet6_twsk(const struct sock
*sk
)
435 return (struct inet6_timewait_sock
*)(((u8
*)sk
) +
436 inet_twsk(sk
)->tw_ipv6_offset
);
439 static inline struct in6_addr
*__inet6_rcv_saddr(const struct sock
*sk
)
441 return likely(sk
->sk_state
!= TCP_TIME_WAIT
) ?
442 &inet6_sk(sk
)->rcv_saddr
: &inet6_twsk(sk
)->tw_v6_rcv_saddr
;
445 static inline struct in6_addr
*inet6_rcv_saddr(const struct sock
*sk
)
447 return sk
->sk_family
== AF_INET6
? __inet6_rcv_saddr(sk
) : NULL
;
450 static inline int inet_v6_ipv6only(const struct sock
*sk
)
452 return likely(sk
->sk_state
!= TCP_TIME_WAIT
) ?
453 ipv6_only_sock(sk
) : inet_twsk(sk
)->tw_ipv6only
;
456 #define __ipv6_only_sock(sk) 0
457 #define ipv6_only_sock(sk) 0
459 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
464 static inline struct inet6_request_sock
*
465 inet6_rsk(const struct request_sock
*rsk
)
470 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
475 #define __inet6_rcv_saddr(__sk) NULL
476 #define inet6_rcv_saddr(__sk) NULL
477 #define tcp_twsk_ipv6only(__sk) 0
478 #define inet_v6_ipv6only(__sk) 0
479 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
481 #define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\
482 (((__sk)->sk_hash == (__hash)) && \
483 ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports)) && \
484 ((__sk)->sk_family == AF_INET6) && \
485 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
486 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
487 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
489 #endif /* __KERNEL__ */