4 #include <uapi/linux/ipv6.h>
6 #define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
8 * This structure contains configuration options per IPv6 link.
15 __s32 accept_redirects
;
19 __s32 rtr_solicit_interval
;
20 __s32 rtr_solicit_delay
;
21 __s32 force_mld_version
;
22 #ifdef CONFIG_IPV6_PRIVACY
25 __s32 temp_prefered_lft
;
26 __s32 regen_max_retry
;
27 __s32 max_desync_factor
;
30 __s32 accept_ra_defrtr
;
31 __s32 accept_ra_pinfo
;
32 #ifdef CONFIG_IPV6_ROUTER_PREF
33 __s32 accept_ra_rtr_pref
;
34 __s32 rtr_probe_interval
;
35 #ifdef CONFIG_IPV6_ROUTE_INFO
36 __s32 accept_ra_rt_info_max_plen
;
40 __s32 accept_source_route
;
41 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
44 #ifdef CONFIG_IPV6_MROUTE
58 extern struct ipv6_params ipv6_defaults
;
59 #include <linux/icmpv6.h>
60 #include <linux/tcp.h>
61 #include <linux/udp.h>
63 #include <net/inet_sock.h>
65 static inline struct ipv6hdr
*ipv6_hdr(const struct sk_buff
*skb
)
67 return (struct ipv6hdr
*)skb_network_header(skb
);
70 static inline struct ipv6hdr
*inner_ipv6_hdr(const struct sk_buff
*skb
)
72 return (struct ipv6hdr
*)skb_inner_network_header(skb
);
75 static inline struct ipv6hdr
*ipipv6_hdr(const struct sk_buff
*skb
)
77 return (struct ipv6hdr
*)skb_transport_header(skb
);
80 static inline __u8
ipv6_tclass(const struct ipv6hdr
*iph
)
82 return (ntohl(*(__be32
*)iph
) >> 20) & 0xff;
86 This structure contains results of exthdrs parsing
87 as offsets from skb->nh.
90 struct inet6_skb_parm
{
100 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
105 #define IP6SKB_XFRM_TRANSFORMED 1
106 #define IP6SKB_FORWARDED 2
107 #define IP6SKB_REROUTED 4
110 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
111 #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
113 static inline int inet6_iif(const struct sk_buff
*skb
)
115 return IP6CB(skb
)->iif
;
118 struct inet6_request_sock
{
119 struct in6_addr loc_addr
;
120 struct in6_addr rmt_addr
;
121 struct sk_buff
*pktopts
;
125 struct tcp6_request_sock
{
126 struct tcp_request_sock tcp6rsk_tcp
;
127 struct inet6_request_sock tcp6rsk_inet6
;
130 struct ipv6_mc_socklist
;
131 struct ipv6_ac_socklist
;
132 struct ipv6_fl_socklist
;
135 * struct ipv6_pinfo - ipv6 private area
137 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
138 * this _must_ be the last member, so that inet6_sk_generic
139 * is able to calculate its offset from the base struct sock
140 * by using the struct proto->slab_obj_size member. -acme
143 struct in6_addr saddr
;
144 struct in6_addr rcv_saddr
;
145 struct in6_addr daddr
;
146 struct in6_pktinfo sticky_pktinfo
;
147 const struct in6_addr
*daddr_cache
;
148 #ifdef CONFIG_IPV6_SUBTREES
149 const struct in6_addr
*saddr_cache
;
157 * Omit one shift by by putting the signed field at MSB.
159 #if defined(__BIG_ENDIAN_BITFIELD)
167 #if defined(__BIG_ENDIAN_BITFIELD)
168 /* Packed in 16bits. */
180 /* pktoption flags */
207 srcprefs
:3, /* 001: prefer temporary address
208 * 010: prefer public address
209 * 100: prefer care-of address
219 struct ipv6_mc_socklist __rcu
*ipv6_mc_list
;
220 struct ipv6_ac_socklist
*ipv6_ac_list
;
221 struct ipv6_fl_socklist
*ipv6_fl_list
;
223 struct ipv6_txoptions
*opt
;
224 struct sk_buff
*pktoptions
;
225 struct sk_buff
*rxpmtu
;
227 struct ipv6_txoptions
*opt
;
233 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
235 /* inet_sock has to be the first member of raw6_sock */
236 struct inet_sock inet
;
237 __u32 checksum
; /* perform checksum */
238 __u32 offset
; /* checksum offset */
239 struct icmp6_filter filter
;
241 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
242 struct ipv6_pinfo inet6
;
247 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
248 struct ipv6_pinfo inet6
;
253 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
254 struct ipv6_pinfo inet6
;
257 extern int inet6_sk_rebuild_header(struct sock
*sk
);
259 struct inet6_timewait_sock
{
260 struct in6_addr tw_v6_daddr
;
261 struct in6_addr tw_v6_rcv_saddr
;
264 struct tcp6_timewait_sock
{
265 struct tcp_timewait_sock tcp6tw_tcp
;
266 struct inet6_timewait_sock tcp6tw_inet6
;
269 static inline struct inet6_timewait_sock
*inet6_twsk(const struct sock
*sk
)
271 return (struct inet6_timewait_sock
*)(((u8
*)sk
) +
272 inet_twsk(sk
)->tw_ipv6_offset
);
275 #if IS_ENABLED(CONFIG_IPV6)
276 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
278 return inet_sk(__sk
)->pinet6
;
281 static inline struct inet6_request_sock
*
282 inet6_rsk(const struct request_sock
*rsk
)
284 return (struct inet6_request_sock
*)(((u8
*)rsk
) +
285 inet_rsk(rsk
)->inet6_rsk_offset
);
288 static inline u32
inet6_rsk_offset(struct request_sock
*rsk
)
290 return rsk
->rsk_ops
->obj_size
- sizeof(struct inet6_request_sock
);
293 static inline struct request_sock
*inet6_reqsk_alloc(struct request_sock_ops
*ops
)
295 struct request_sock
*req
= reqsk_alloc(ops
);
298 inet_rsk(req
)->inet6_rsk_offset
= inet6_rsk_offset(req
);
299 inet6_rsk(req
)->pktopts
= NULL
;
305 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
307 return (struct raw6_sock
*)sk
;
310 static inline void inet_sk_copy_descendant(struct sock
*sk_to
,
311 const struct sock
*sk_from
)
313 int ancestor_size
= sizeof(struct inet_sock
);
315 if (sk_from
->sk_family
== PF_INET6
)
316 ancestor_size
+= sizeof(struct ipv6_pinfo
);
318 __inet_sk_copy_descendant(sk_to
, sk_from
, ancestor_size
);
321 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
322 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
324 static inline u16
inet6_tw_offset(const struct proto
*prot
)
326 return prot
->twsk_prot
->twsk_obj_size
-
327 sizeof(struct inet6_timewait_sock
);
330 static inline struct in6_addr
*__inet6_rcv_saddr(const struct sock
*sk
)
332 return likely(sk
->sk_state
!= TCP_TIME_WAIT
) ?
333 &inet6_sk(sk
)->rcv_saddr
: &inet6_twsk(sk
)->tw_v6_rcv_saddr
;
336 static inline struct in6_addr
*inet6_rcv_saddr(const struct sock
*sk
)
338 return sk
->sk_family
== AF_INET6
? __inet6_rcv_saddr(sk
) : NULL
;
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(sk
)->tw_ipv6only
;
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 inet6_request_sock
*
356 inet6_rsk(const struct request_sock
*rsk
)
361 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
366 #define __inet6_rcv_saddr(__sk) NULL
367 #define inet6_rcv_saddr(__sk) NULL
368 #define tcp_twsk_ipv6only(__sk) 0
369 #define inet_v6_ipv6only(__sk) 0
370 #endif /* IS_ENABLED(CONFIG_IPV6) */
372 #define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
373 ((inet_sk(__sk)->inet_portpair == (__ports)) && \
374 ((__sk)->sk_family == AF_INET6) && \
375 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
376 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
377 (!(__sk)->sk_bound_dev_if || \
378 ((__sk)->sk_bound_dev_if == (__dif))) && \
379 net_eq(sock_net(__sk), (__net)))
381 #define INET6_TW_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
382 ((inet_twsk(__sk)->tw_portpair == (__ports)) && \
383 ((__sk)->sk_family == AF_INET6) && \
384 ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr)) && \
385 ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr)) && \
386 (!(__sk)->sk_bound_dev_if || \
387 ((__sk)->sk_bound_dev_if == (__dif))) && \
388 net_eq(sock_net(__sk), (__net)))