4 #include <uapi/linux/ipv6.h>
6 #define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
7 #define ipv6_authlen(p) (((p)->hdrlen+2) << 2)
9 * This structure contains configuration options per IPv6 link.
16 __s32 accept_redirects
;
20 __s32 rtr_solicit_interval
;
21 __s32 rtr_solicit_delay
;
22 __s32 force_mld_version
;
23 __s32 mldv1_unsolicited_report_interval
;
24 __s32 mldv2_unsolicited_report_interval
;
27 __s32 temp_prefered_lft
;
28 __s32 regen_max_retry
;
29 __s32 max_desync_factor
;
31 __s32 accept_ra_defrtr
;
32 __s32 accept_ra_pinfo
;
33 #ifdef CONFIG_IPV6_ROUTER_PREF
34 __s32 accept_ra_rtr_pref
;
35 __s32 rtr_probe_interval
;
36 #ifdef CONFIG_IPV6_ROUTE_INFO
37 __s32 accept_ra_rt_info_max_plen
;
41 __s32 accept_source_route
;
42 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
45 #ifdef CONFIG_IPV6_MROUTE
52 __s32 suppress_frag_ndisc
;
60 extern struct ipv6_params ipv6_defaults
;
61 #include <linux/icmpv6.h>
62 #include <linux/tcp.h>
63 #include <linux/udp.h>
65 #include <net/inet_sock.h>
67 static inline struct ipv6hdr
*ipv6_hdr(const struct sk_buff
*skb
)
69 return (struct ipv6hdr
*)skb_network_header(skb
);
72 static inline struct ipv6hdr
*inner_ipv6_hdr(const struct sk_buff
*skb
)
74 return (struct ipv6hdr
*)skb_inner_network_header(skb
);
77 static inline struct ipv6hdr
*ipipv6_hdr(const struct sk_buff
*skb
)
79 return (struct ipv6hdr
*)skb_transport_header(skb
);
83 This structure contains results of exthdrs parsing
84 as offsets from skb->nh.
87 struct inet6_skb_parm
{
97 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
102 #define IP6SKB_XFRM_TRANSFORMED 1
103 #define IP6SKB_FORWARDED 2
104 #define IP6SKB_REROUTED 4
105 #define IP6SKB_ROUTERALERT 8
106 #define IP6SKB_FRAGMENTED 16
109 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
110 #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
112 static inline int inet6_iif(const struct sk_buff
*skb
)
114 return IP6CB(skb
)->iif
;
117 struct tcp6_request_sock
{
118 struct tcp_request_sock tcp6rsk_tcp
;
121 struct ipv6_mc_socklist
;
122 struct ipv6_ac_socklist
;
123 struct ipv6_fl_socklist
;
126 * struct ipv6_pinfo - ipv6 private area
128 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
129 * this _must_ be the last member, so that inet6_sk_generic
130 * is able to calculate its offset from the base struct sock
131 * by using the struct proto->slab_obj_size member. -acme
134 struct in6_addr saddr
;
135 struct in6_pktinfo sticky_pktinfo
;
136 const struct in6_addr
*daddr_cache
;
137 #ifdef CONFIG_IPV6_SUBTREES
138 const struct in6_addr
*saddr_cache
;
146 * Omit one shift by by putting the signed field at MSB.
148 #if defined(__BIG_ENDIAN_BITFIELD)
156 #if defined(__BIG_ENDIAN_BITFIELD)
157 /* Packed in 16bits. */
169 /* pktoption flags */
197 srcprefs
:3, /* 001: prefer temporary address
198 * 010: prefer public address
199 * 100: prefer care-of address
209 struct ipv6_mc_socklist __rcu
*ipv6_mc_list
;
210 struct ipv6_ac_socklist
*ipv6_ac_list
;
211 struct ipv6_fl_socklist __rcu
*ipv6_fl_list
;
213 struct ipv6_txoptions
*opt
;
214 struct sk_buff
*pktoptions
;
215 struct sk_buff
*rxpmtu
;
217 struct ipv6_txoptions
*opt
;
223 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
225 /* inet_sock has to be the first member of raw6_sock */
226 struct inet_sock inet
;
227 __u32 checksum
; /* perform checksum */
228 __u32 offset
; /* checksum offset */
229 struct icmp6_filter filter
;
231 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
232 struct ipv6_pinfo inet6
;
237 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
238 struct ipv6_pinfo inet6
;
243 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
244 struct ipv6_pinfo inet6
;
247 extern int inet6_sk_rebuild_header(struct sock
*sk
);
249 struct tcp6_timewait_sock
{
250 struct tcp_timewait_sock tcp6tw_tcp
;
253 #if IS_ENABLED(CONFIG_IPV6)
254 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
256 return inet_sk(__sk
)->pinet6
;
259 static inline struct request_sock
*inet6_reqsk_alloc(struct request_sock_ops
*ops
)
261 struct request_sock
*req
= reqsk_alloc(ops
);
264 inet_rsk(req
)->pktopts
= NULL
;
269 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
271 return (struct raw6_sock
*)sk
;
274 static inline void inet_sk_copy_descendant(struct sock
*sk_to
,
275 const struct sock
*sk_from
)
277 int ancestor_size
= sizeof(struct inet_sock
);
279 if (sk_from
->sk_family
== PF_INET6
)
280 ancestor_size
+= sizeof(struct ipv6_pinfo
);
282 __inet_sk_copy_descendant(sk_to
, sk_from
, ancestor_size
);
285 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
286 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
287 #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \
288 inet6_sk(sk)->rxopt.bits.rxinfo)
290 static inline const struct in6_addr
*inet6_rcv_saddr(const struct sock
*sk
)
292 if (sk
->sk_family
== AF_INET6
)
293 return &sk
->sk_v6_rcv_saddr
;
297 static inline int inet_v6_ipv6only(const struct sock
*sk
)
299 return likely(sk
->sk_state
!= TCP_TIME_WAIT
) ?
300 ipv6_only_sock(sk
) : inet_twsk(sk
)->tw_ipv6only
;
303 #define __ipv6_only_sock(sk) 0
304 #define ipv6_only_sock(sk) 0
305 #define ipv6_sk_rxinfo(sk) 0
307 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
312 static inline struct inet6_request_sock
*
313 inet6_rsk(const struct request_sock
*rsk
)
318 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
323 #define inet6_rcv_saddr(__sk) NULL
324 #define tcp_twsk_ipv6only(__sk) 0
325 #define inet_v6_ipv6only(__sk) 0
326 #endif /* IS_ENABLED(CONFIG_IPV6) */
328 #define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
329 (((__sk)->sk_portpair == (__ports)) && \
330 ((__sk)->sk_family == AF_INET6) && \
331 ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr)) && \
332 ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr)) && \
333 (!(__sk)->sk_bound_dev_if || \
334 ((__sk)->sk_bound_dev_if == (__dif))) && \
335 net_eq(sock_net(__sk), (__net)))