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
57 extern struct ipv6_params ipv6_defaults;
58 #include <linux/icmpv6.h>
59 #include <linux/tcp.h>
60 #include <linux/udp.h>
62 #include <net/inet_sock.h>
64 static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
66 return (struct ipv6hdr *)skb_network_header(skb);
69 static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
71 return (struct ipv6hdr *)skb_transport_header(skb);
74 static inline __u8 ipv6_tclass(const struct ipv6hdr *iph)
76 return (ntohl(*(__be32 *)iph) >> 20) & 0xff;
80 This structure contains results of exthdrs parsing
81 as offsets from skb->nh.
84 struct inet6_skb_parm {
94 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
99 #define IP6SKB_XFRM_TRANSFORMED 1
100 #define IP6SKB_FORWARDED 2
101 #define IP6SKB_REROUTED 4
104 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
105 #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
107 static inline int inet6_iif(const struct sk_buff *skb)
109 return IP6CB(skb)->iif;
112 struct inet6_request_sock {
113 struct in6_addr loc_addr;
114 struct in6_addr rmt_addr;
115 struct sk_buff *pktopts;
119 struct tcp6_request_sock {
120 struct tcp_request_sock tcp6rsk_tcp;
121 struct inet6_request_sock tcp6rsk_inet6;
124 struct ipv6_mc_socklist;
125 struct ipv6_ac_socklist;
126 struct ipv6_fl_socklist;
129 * struct ipv6_pinfo - ipv6 private area
131 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
132 * this _must_ be the last member, so that inet6_sk_generic
133 * is able to calculate its offset from the base struct sock
134 * by using the struct proto->slab_obj_size member. -acme
137 struct in6_addr saddr;
138 struct in6_addr rcv_saddr;
139 struct in6_addr daddr;
140 struct in6_pktinfo sticky_pktinfo;
141 const struct in6_addr *daddr_cache;
142 #ifdef CONFIG_IPV6_SUBTREES
143 const struct in6_addr *saddr_cache;
151 * Omit one shift by by putting the signed field at MSB.
153 #if defined(__BIG_ENDIAN_BITFIELD)
161 #if defined(__BIG_ENDIAN_BITFIELD)
162 /* Packed in 16bits. */
174 /* pktoption flags */
201 srcprefs:3, /* 001: prefer temporary address
202 * 010: prefer public address
203 * 100: prefer care-of address
213 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
214 struct ipv6_ac_socklist *ipv6_ac_list;
215 struct ipv6_fl_socklist *ipv6_fl_list;
217 struct ipv6_txoptions *opt;
218 struct sk_buff *pktoptions;
219 struct sk_buff *rxpmtu;
221 struct ipv6_txoptions *opt;
227 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
229 /* inet_sock has to be the first member of raw6_sock */
230 struct inet_sock inet;
231 __u32 checksum; /* perform checksum */
232 __u32 offset; /* checksum offset */
233 struct icmp6_filter filter;
235 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
236 struct ipv6_pinfo inet6;
241 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
242 struct ipv6_pinfo inet6;
247 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
248 struct ipv6_pinfo inet6;
251 extern int inet6_sk_rebuild_header(struct sock *sk);
253 struct inet6_timewait_sock {
254 struct in6_addr tw_v6_daddr;
255 struct in6_addr tw_v6_rcv_saddr;
258 struct tcp6_timewait_sock {
259 struct tcp_timewait_sock tcp6tw_tcp;
260 struct inet6_timewait_sock tcp6tw_inet6;
263 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
265 return (struct inet6_timewait_sock *)(((u8 *)sk) +
266 inet_twsk(sk)->tw_ipv6_offset);
269 #if IS_ENABLED(CONFIG_IPV6)
270 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
272 return inet_sk(__sk)->pinet6;
275 static inline struct inet6_request_sock *
276 inet6_rsk(const struct request_sock *rsk)
278 return (struct inet6_request_sock *)(((u8 *)rsk) +
279 inet_rsk(rsk)->inet6_rsk_offset);
282 static inline u32 inet6_rsk_offset(struct request_sock *rsk)
284 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
287 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
289 struct request_sock *req = reqsk_alloc(ops);
292 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
293 inet6_rsk(req)->pktopts = NULL;
299 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
301 return (struct raw6_sock *)sk;
304 static inline void inet_sk_copy_descendant(struct sock *sk_to,
305 const struct sock *sk_from)
307 int ancestor_size = sizeof(struct inet_sock);
309 if (sk_from->sk_family == PF_INET6)
310 ancestor_size += sizeof(struct ipv6_pinfo);
312 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
315 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
316 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
318 static inline u16 inet6_tw_offset(const struct proto *prot)
320 return prot->twsk_prot->twsk_obj_size -
321 sizeof(struct inet6_timewait_sock);
324 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
326 return likely(sk->sk_state != TCP_TIME_WAIT) ?
327 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
330 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
332 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
335 static inline int inet_v6_ipv6only(const struct sock *sk)
337 return likely(sk->sk_state != TCP_TIME_WAIT) ?
338 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
341 #define __ipv6_only_sock(sk) 0
342 #define ipv6_only_sock(sk) 0
344 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
349 static inline struct inet6_request_sock *
350 inet6_rsk(const struct request_sock *rsk)
355 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
360 #define __inet6_rcv_saddr(__sk) NULL
361 #define inet6_rcv_saddr(__sk) NULL
362 #define tcp_twsk_ipv6only(__sk) 0
363 #define inet_v6_ipv6only(__sk) 0
364 #endif /* IS_ENABLED(CONFIG_IPV6) */
366 #define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\
367 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
368 ((*((__portpair *)&(inet_sk(__sk)->inet_dport))) == (__ports)) && \
369 ((__sk)->sk_family == AF_INET6) && \
370 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
371 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
372 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
374 #define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \
375 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
376 (*((__portpair *)&(inet_twsk(__sk)->tw_dport)) == (__ports)) && \
377 ((__sk)->sk_family == PF_INET6) && \
378 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr))) && \
379 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr))) && \
380 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))