4 #include <linux/config.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
;
26 struct in6_addr ifr6_addr
;
31 #define IPV6_SRCRT_STRICT 0x01 /* this hop must be a neighbor */
32 #define IPV6_SRCRT_TYPE_0 0 /* IPv6 type 0 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
;
71 __u32 bitmap
; /* strict/loose bit map */
72 struct in6_addr addr
[0];
74 #define rt0_type rt_hdr.type
77 struct ipv6_auth_hdr
{
79 __u8 hdrlen
; /* This one is measured in 32 bit units! */
82 __u32 seq_no
; /* Sequence number */
83 __u8 auth_data
[0]; /* Length variable but >=4. Mind the 64 bit alignment! */
88 __u32 seq_no
; /* Sequence number */
89 __u8 enc_data
[0]; /* Length variable but >=8. Mind the 64 bit alignment! */
92 struct ipv6_comp_hdr
{
101 * BEWARE, it is incorrect. The first 4 bits of flow_lbl
102 * are glued to priority now, forming "class".
106 #if defined(__LITTLE_ENDIAN_BITFIELD)
109 #elif defined(__BIG_ENDIAN_BITFIELD)
113 #error "Please fix <asm/byteorder.h>"
121 struct in6_addr saddr
;
122 struct in6_addr daddr
;
126 * This structure contains configuration options per IPv6 link.
128 struct ipv6_devconf
{
133 __s32 accept_redirects
;
137 __s32 rtr_solicit_interval
;
138 __s32 rtr_solicit_delay
;
139 __s32 force_mld_version
;
140 #ifdef CONFIG_IPV6_PRIVACY
142 __s32 temp_valid_lft
;
143 __s32 temp_prefered_lft
;
144 __s32 regen_max_retry
;
145 __s32 max_desync_factor
;
151 /* index values for the variables in ipv6_devconf */
153 DEVCONF_FORWARDING
= 0,
157 DEVCONF_ACCEPT_REDIRECTS
,
159 DEVCONF_DAD_TRANSMITS
,
160 DEVCONF_RTR_SOLICITS
,
161 DEVCONF_RTR_SOLICIT_INTERVAL
,
162 DEVCONF_RTR_SOLICIT_DELAY
,
163 DEVCONF_USE_TEMPADDR
,
164 DEVCONF_TEMP_VALID_LFT
,
165 DEVCONF_TEMP_PREFERED_LFT
,
166 DEVCONF_REGEN_MAX_RETRY
,
167 DEVCONF_MAX_DESYNC_FACTOR
,
168 DEVCONF_MAX_ADDRESSES
,
169 DEVCONF_FORCE_MLD_VERSION
,
174 #include <linux/in6.h> /* struct sockaddr_in6 */
175 #include <linux/icmpv6.h>
176 #include <net/if_inet6.h> /* struct ipv6_mc_socklist */
177 #include <linux/tcp.h>
178 #include <linux/udp.h>
181 This structure contains results of exthdrs parsing
182 as offsets from skb->nh.
185 struct inet6_skb_parm
{
194 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
196 struct tcp6_request_sock
{
197 struct tcp_request_sock req
;
198 struct in6_addr loc_addr
;
199 struct in6_addr rmt_addr
;
200 struct sk_buff
*pktopts
;
204 static inline struct tcp6_request_sock
*tcp6_rsk(const struct request_sock
*sk
)
206 return (struct tcp6_request_sock
*)sk
;
210 * struct ipv6_pinfo - ipv6 private area
212 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
213 * this _must_ be the last member, so that inet6_sk_generic
214 * is able to calculate its offset from the base struct sock
215 * by using the struct proto->slab_obj_size member. -acme
218 struct in6_addr saddr
;
219 struct in6_addr rcv_saddr
;
220 struct in6_addr daddr
;
221 struct in6_addr
*daddr_cache
;
229 /* pktoption flags */
251 struct ipv6_mc_socklist
*ipv6_mc_list
;
252 struct ipv6_ac_socklist
*ipv6_ac_list
;
253 struct ipv6_fl_socklist
*ipv6_fl_list
;
255 struct ipv6_txoptions
*opt
;
256 struct sk_buff
*pktoptions
;
258 struct ipv6_txoptions
*opt
;
264 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
266 /* inet_sock has to be the first member of raw6_sock */
267 struct inet_sock inet
;
268 __u32 checksum
; /* perform checksum */
269 __u32 offset
; /* checksum offset */
270 struct icmp6_filter filter
;
271 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
272 struct ipv6_pinfo inet6
;
277 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
278 struct ipv6_pinfo inet6
;
283 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
284 struct ipv6_pinfo inet6
;
287 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
288 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
290 return inet_sk(__sk
)->pinet6
;
293 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
295 return (struct raw6_sock
*)sk
;
298 static inline void inet_sk_copy_descendant(struct sock
*sk_to
,
299 const struct sock
*sk_from
)
301 int ancestor_size
= sizeof(struct inet_sock
);
303 if (sk_from
->sk_family
== PF_INET6
)
304 ancestor_size
+= sizeof(struct ipv6_pinfo
);
306 __inet_sk_copy_descendant(sk_to
, sk_from
, ancestor_size
);
309 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
310 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
312 #include <linux/tcp.h>
314 struct tcp6_timewait_sock
{
315 struct tcp_timewait_sock tw_v6_sk
;
316 struct in6_addr tw_v6_daddr
;
317 struct in6_addr tw_v6_rcv_saddr
;
320 static inline struct tcp6_timewait_sock
*tcp6_twsk(const struct sock
*sk
)
322 return (struct tcp6_timewait_sock
*)sk
;
325 static inline struct in6_addr
*__tcp_v6_rcv_saddr(const struct sock
*sk
)
327 return likely(sk
->sk_state
!= TCP_TIME_WAIT
) ?
328 &inet6_sk(sk
)->rcv_saddr
: &tcp6_twsk(sk
)->tw_v6_rcv_saddr
;
331 static inline struct in6_addr
*tcp_v6_rcv_saddr(const struct sock
*sk
)
333 return sk
->sk_family
== AF_INET6
? __tcp_v6_rcv_saddr(sk
) : NULL
;
336 static inline int inet_twsk_ipv6only(const struct sock
*sk
)
338 return inet_twsk(sk
)->tw_ipv6only
;
341 static inline int inet_v6_ipv6only(const struct sock
*sk
)
343 return likely(sk
->sk_state
!= TCP_TIME_WAIT
) ?
344 ipv6_only_sock(sk
) : inet_twsk_ipv6only(sk
);
347 #define __ipv6_only_sock(sk) 0
348 #define ipv6_only_sock(sk) 0
350 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
355 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
360 #define __tcp_v6_rcv_saddr(__sk) NULL
361 #define tcp_v6_rcv_saddr(__sk) NULL
362 #define tcp_twsk_ipv6only(__sk) 0
363 #define inet_v6_ipv6only(__sk) 0
364 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
366 #define INET6_MATCH(__sk, __saddr, __daddr, __ports, __dif) \
367 (((*((__u32 *)&(inet_sk(__sk)->dport))) == (__ports)) && \
368 ((__sk)->sk_family == AF_INET6) && \
369 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
370 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
371 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
373 #endif /* __KERNEL__ */