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 __s32 accept_ra_from_local
;
43 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
46 #ifdef CONFIG_IPV6_MROUTE
53 __s32 suppress_frag_ndisc
;
61 extern struct ipv6_params ipv6_defaults
;
62 #include <linux/icmpv6.h>
63 #include <linux/tcp.h>
64 #include <linux/udp.h>
66 #include <net/inet_sock.h>
68 static inline struct ipv6hdr
*ipv6_hdr(const struct sk_buff
*skb
)
70 return (struct ipv6hdr
*)skb_network_header(skb
);
73 static inline struct ipv6hdr
*inner_ipv6_hdr(const struct sk_buff
*skb
)
75 return (struct ipv6hdr
*)skb_inner_network_header(skb
);
78 static inline struct ipv6hdr
*ipipv6_hdr(const struct sk_buff
*skb
)
80 return (struct ipv6hdr
*)skb_transport_header(skb
);
84 This structure contains results of exthdrs parsing
85 as offsets from skb->nh.
88 struct inet6_skb_parm
{
98 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
103 #define IP6SKB_XFRM_TRANSFORMED 1
104 #define IP6SKB_FORWARDED 2
105 #define IP6SKB_REROUTED 4
106 #define IP6SKB_ROUTERALERT 8
107 #define IP6SKB_FRAGMENTED 16
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 tcp6_request_sock
{
119 struct tcp_request_sock tcp6rsk_tcp
;
122 struct ipv6_mc_socklist
;
123 struct ipv6_ac_socklist
;
124 struct ipv6_fl_socklist
;
127 * struct ipv6_pinfo - ipv6 private area
129 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
130 * this _must_ be the last member, so that inet6_sk_generic
131 * is able to calculate its offset from the base struct sock
132 * by using the struct proto->slab_obj_size member. -acme
135 struct in6_addr saddr
;
136 struct in6_pktinfo sticky_pktinfo
;
137 const struct in6_addr
*daddr_cache
;
138 #ifdef CONFIG_IPV6_SUBTREES
139 const struct in6_addr
*saddr_cache
;
147 * Omit one shift by by putting the signed field at MSB.
149 #if defined(__BIG_ENDIAN_BITFIELD)
157 #if defined(__BIG_ENDIAN_BITFIELD)
158 /* Packed in 16bits. */
170 /* pktoption flags */
197 padding
:1, /* 1 bit hole */
198 srcprefs
:3, /* 001: prefer temporary address
199 * 010: prefer public address
200 * 100: prefer care-of address
211 struct ipv6_mc_socklist __rcu
*ipv6_mc_list
;
212 struct ipv6_ac_socklist
*ipv6_ac_list
;
213 struct ipv6_fl_socklist __rcu
*ipv6_fl_list
;
215 struct ipv6_txoptions
*opt
;
216 struct sk_buff
*pktoptions
;
217 struct sk_buff
*rxpmtu
;
219 struct ipv6_txoptions
*opt
;
225 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
227 /* inet_sock has to be the first member of raw6_sock */
228 struct inet_sock inet
;
229 __u32 checksum
; /* perform checksum */
230 __u32 offset
; /* checksum offset */
231 struct icmp6_filter filter
;
233 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
234 struct ipv6_pinfo inet6
;
239 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
240 struct ipv6_pinfo inet6
;
245 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
246 struct ipv6_pinfo inet6
;
249 extern int inet6_sk_rebuild_header(struct sock
*sk
);
251 struct tcp6_timewait_sock
{
252 struct tcp_timewait_sock tcp6tw_tcp
;
255 #if IS_ENABLED(CONFIG_IPV6)
256 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
258 return inet_sk(__sk
)->pinet6
;
261 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
263 return (struct raw6_sock
*)sk
;
266 static inline void inet_sk_copy_descendant(struct sock
*sk_to
,
267 const struct sock
*sk_from
)
269 int ancestor_size
= sizeof(struct inet_sock
);
271 if (sk_from
->sk_family
== PF_INET6
)
272 ancestor_size
+= sizeof(struct ipv6_pinfo
);
274 __inet_sk_copy_descendant(sk_to
, sk_from
, ancestor_size
);
277 #define __ipv6_only_sock(sk) (sk->sk_ipv6only)
278 #define ipv6_only_sock(sk) (__ipv6_only_sock(sk))
279 #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \
280 inet6_sk(sk)->rxopt.bits.rxinfo)
282 static inline const struct in6_addr
*inet6_rcv_saddr(const struct sock
*sk
)
284 if (sk
->sk_family
== AF_INET6
)
285 return &sk
->sk_v6_rcv_saddr
;
289 static inline int inet_v6_ipv6only(const struct sock
*sk
)
291 /* ipv6only field is at same position for timewait and other sockets */
292 return ipv6_only_sock(sk
);
295 #define __ipv6_only_sock(sk) 0
296 #define ipv6_only_sock(sk) 0
297 #define ipv6_sk_rxinfo(sk) 0
299 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
304 static inline struct inet6_request_sock
*
305 inet6_rsk(const struct request_sock
*rsk
)
310 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
315 #define inet6_rcv_saddr(__sk) NULL
316 #define tcp_twsk_ipv6only(__sk) 0
317 #define inet_v6_ipv6only(__sk) 0
318 #endif /* IS_ENABLED(CONFIG_IPV6) */
320 #define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
321 (((__sk)->sk_portpair == (__ports)) && \
322 ((__sk)->sk_family == AF_INET6) && \
323 ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr)) && \
324 ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr)) && \
325 (!(__sk)->sk_bound_dev_if || \
326 ((__sk)->sk_bound_dev_if == (__dif))) && \
327 net_eq(sock_net(__sk), (__net)))