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 __s32 mldv1_unsolicited_report_interval;
23 __s32 mldv2_unsolicited_report_interval;
24 #ifdef CONFIG_IPV6_PRIVACY
27 __s32 temp_prefered_lft;
28 __s32 regen_max_retry;
29 __s32 max_desync_factor;
32 __s32 accept_ra_defrtr;
33 __s32 accept_ra_pinfo;
34 #ifdef CONFIG_IPV6_ROUTER_PREF
35 __s32 accept_ra_rtr_pref;
36 __s32 rtr_probe_interval;
37 #ifdef CONFIG_IPV6_ROUTE_INFO
38 __s32 accept_ra_rt_info_max_plen;
42 __s32 accept_source_route;
43 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
46 #ifdef CONFIG_IPV6_MROUTE
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 inet6_request_sock {
118 struct in6_addr loc_addr;
119 struct in6_addr rmt_addr;
120 struct sk_buff *pktopts;
124 struct tcp6_request_sock {
125 struct tcp_request_sock tcp6rsk_tcp;
126 struct inet6_request_sock tcp6rsk_inet6;
129 struct ipv6_mc_socklist;
130 struct ipv6_ac_socklist;
131 struct ipv6_fl_socklist;
134 * struct ipv6_pinfo - ipv6 private area
136 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
137 * this _must_ be the last member, so that inet6_sk_generic
138 * is able to calculate its offset from the base struct sock
139 * by using the struct proto->slab_obj_size member. -acme
142 struct in6_addr saddr;
143 struct in6_addr rcv_saddr;
144 struct in6_addr daddr;
145 struct in6_pktinfo sticky_pktinfo;
146 const struct in6_addr *daddr_cache;
147 #ifdef CONFIG_IPV6_SUBTREES
148 const struct in6_addr *saddr_cache;
156 * Omit one shift by by putting the signed field at MSB.
158 #if defined(__BIG_ENDIAN_BITFIELD)
166 #if defined(__BIG_ENDIAN_BITFIELD)
167 /* Packed in 16bits. */
179 /* pktoption flags */
206 srcprefs:3, /* 001: prefer temporary address
207 * 010: prefer public address
208 * 100: prefer care-of address
218 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
219 struct ipv6_ac_socklist *ipv6_ac_list;
220 struct ipv6_fl_socklist __rcu *ipv6_fl_list;
222 struct ipv6_txoptions *opt;
223 struct sk_buff *pktoptions;
224 struct sk_buff *rxpmtu;
226 struct ipv6_txoptions *opt;
232 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
234 /* inet_sock has to be the first member of raw6_sock */
235 struct inet_sock inet;
236 __u32 checksum; /* perform checksum */
237 __u32 offset; /* checksum offset */
238 struct icmp6_filter filter;
240 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
241 struct ipv6_pinfo inet6;
246 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
247 struct ipv6_pinfo inet6;
252 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
253 struct ipv6_pinfo inet6;
256 extern int inet6_sk_rebuild_header(struct sock *sk);
258 struct inet6_timewait_sock {
259 struct in6_addr tw_v6_daddr;
260 struct in6_addr tw_v6_rcv_saddr;
263 struct tcp6_timewait_sock {
264 struct tcp_timewait_sock tcp6tw_tcp;
265 struct inet6_timewait_sock tcp6tw_inet6;
268 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
270 return (struct inet6_timewait_sock *)(((u8 *)sk) +
271 inet_twsk(sk)->tw_ipv6_offset);
274 #if IS_ENABLED(CONFIG_IPV6)
275 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
277 return inet_sk(__sk)->pinet6;
280 static inline struct inet6_request_sock *
281 inet6_rsk(const struct request_sock *rsk)
283 return (struct inet6_request_sock *)(((u8 *)rsk) +
284 inet_rsk(rsk)->inet6_rsk_offset);
287 static inline u32 inet6_rsk_offset(struct request_sock *rsk)
289 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
292 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
294 struct request_sock *req = reqsk_alloc(ops);
297 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
298 inet6_rsk(req)->pktopts = NULL;
304 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
306 return (struct raw6_sock *)sk;
309 static inline void inet_sk_copy_descendant(struct sock *sk_to,
310 const struct sock *sk_from)
312 int ancestor_size = sizeof(struct inet_sock);
314 if (sk_from->sk_family == PF_INET6)
315 ancestor_size += sizeof(struct ipv6_pinfo);
317 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
320 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
321 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
323 static inline u16 inet6_tw_offset(const struct proto *prot)
325 return prot->twsk_prot->twsk_obj_size -
326 sizeof(struct inet6_timewait_sock);
329 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
331 return likely(sk->sk_state != TCP_TIME_WAIT) ?
332 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
335 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
337 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
340 static inline int inet_v6_ipv6only(const struct sock *sk)
342 return likely(sk->sk_state != TCP_TIME_WAIT) ?
343 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
346 #define __ipv6_only_sock(sk) 0
347 #define ipv6_only_sock(sk) 0
349 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
354 static inline struct inet6_request_sock *
355 inet6_rsk(const struct request_sock *rsk)
360 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
365 #define __inet6_rcv_saddr(__sk) NULL
366 #define inet6_rcv_saddr(__sk) NULL
367 #define tcp_twsk_ipv6only(__sk) 0
368 #define inet_v6_ipv6only(__sk) 0
369 #endif /* IS_ENABLED(CONFIG_IPV6) */
371 #define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
372 ((inet_sk(__sk)->inet_portpair == (__ports)) && \
373 ((__sk)->sk_family == AF_INET6) && \
374 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
375 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
376 (!(__sk)->sk_bound_dev_if || \
377 ((__sk)->sk_bound_dev_if == (__dif))) && \
378 net_eq(sock_net(__sk), (__net)))
380 #define INET6_TW_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
381 ((inet_twsk(__sk)->tw_portpair == (__ports)) && \
382 ((__sk)->sk_family == AF_INET6) && \
383 ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr)) && \
384 ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr)) && \
385 (!(__sk)->sk_bound_dev_if || \
386 ((__sk)->sk_bound_dev_if == (__dif))) && \
387 net_eq(sock_net(__sk), (__net)))