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;
39 __s32 accept_ra_rt_table;
41 __s32 accept_source_route;
42 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
45 #ifdef CONFIG_IPV6_MROUTE
59 extern struct ipv6_params ipv6_defaults;
60 #include <linux/icmpv6.h>
61 #include <linux/tcp.h>
62 #include <linux/udp.h>
64 #include <net/inet_sock.h>
66 static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
68 return (struct ipv6hdr *)skb_network_header(skb);
71 static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb)
73 return (struct ipv6hdr *)skb_inner_network_header(skb);
76 static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
78 return (struct ipv6hdr *)skb_transport_header(skb);
82 This structure contains results of exthdrs parsing
83 as offsets from skb->nh.
86 struct inet6_skb_parm {
96 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
101 #define IP6SKB_XFRM_TRANSFORMED 1
102 #define IP6SKB_FORWARDED 2
103 #define IP6SKB_REROUTED 4
104 #define IP6SKB_ROUTERALERT 8
105 #define IP6SKB_FRAGMENTED 16
108 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
109 #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
111 static inline int inet6_iif(const struct sk_buff *skb)
113 return IP6CB(skb)->iif;
116 struct inet6_request_sock {
117 struct in6_addr loc_addr;
118 struct in6_addr rmt_addr;
119 struct sk_buff *pktopts;
123 struct tcp6_request_sock {
124 struct tcp_request_sock tcp6rsk_tcp;
125 struct inet6_request_sock tcp6rsk_inet6;
128 struct ipv6_mc_socklist;
129 struct ipv6_ac_socklist;
130 struct ipv6_fl_socklist;
133 * struct ipv6_pinfo - ipv6 private area
135 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
136 * this _must_ be the last member, so that inet6_sk_generic
137 * is able to calculate its offset from the base struct sock
138 * by using the struct proto->slab_obj_size member. -acme
141 struct in6_addr saddr;
142 struct in6_addr rcv_saddr;
143 struct in6_addr daddr;
144 struct in6_pktinfo sticky_pktinfo;
145 const struct in6_addr *daddr_cache;
146 #ifdef CONFIG_IPV6_SUBTREES
147 const struct in6_addr *saddr_cache;
155 * Omit one shift by by putting the signed field at MSB.
157 #if defined(__BIG_ENDIAN_BITFIELD)
165 #if defined(__BIG_ENDIAN_BITFIELD)
166 /* Packed in 16bits. */
178 /* pktoption flags */
205 srcprefs:3, /* 001: prefer temporary address
206 * 010: prefer public address
207 * 100: prefer care-of address
217 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
218 struct ipv6_ac_socklist *ipv6_ac_list;
219 struct ipv6_fl_socklist __rcu *ipv6_fl_list;
221 struct ipv6_txoptions *opt;
222 struct sk_buff *pktoptions;
223 struct sk_buff *rxpmtu;
225 struct ipv6_txoptions *opt;
231 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
233 /* inet_sock has to be the first member of raw6_sock */
234 struct inet_sock inet;
235 __u32 checksum; /* perform checksum */
236 __u32 offset; /* checksum offset */
237 struct icmp6_filter filter;
239 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
240 struct ipv6_pinfo inet6;
245 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
246 struct ipv6_pinfo inet6;
251 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
252 struct ipv6_pinfo inet6;
255 extern int inet6_sk_rebuild_header(struct sock *sk);
257 struct inet6_timewait_sock {
258 struct in6_addr tw_v6_daddr;
259 struct in6_addr tw_v6_rcv_saddr;
262 struct tcp6_timewait_sock {
263 struct tcp_timewait_sock tcp6tw_tcp;
264 struct inet6_timewait_sock tcp6tw_inet6;
267 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
269 return (struct inet6_timewait_sock *)(((u8 *)sk) +
270 inet_twsk(sk)->tw_ipv6_offset);
273 #if IS_ENABLED(CONFIG_IPV6)
274 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
276 return inet_sk(__sk)->pinet6;
279 static inline struct inet6_request_sock *
280 inet6_rsk(const struct request_sock *rsk)
282 return (struct inet6_request_sock *)(((u8 *)rsk) +
283 inet_rsk(rsk)->inet6_rsk_offset);
286 static inline u32 inet6_rsk_offset(struct request_sock *rsk)
288 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
291 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
293 struct request_sock *req = reqsk_alloc(ops);
296 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
297 inet6_rsk(req)->pktopts = NULL;
303 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
305 return (struct raw6_sock *)sk;
308 static inline void inet_sk_copy_descendant(struct sock *sk_to,
309 const struct sock *sk_from)
311 int ancestor_size = sizeof(struct inet_sock);
313 if (sk_from->sk_family == PF_INET6)
314 ancestor_size += sizeof(struct ipv6_pinfo);
316 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
319 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
320 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
322 static inline u16 inet6_tw_offset(const struct proto *prot)
324 return prot->twsk_prot->twsk_obj_size -
325 sizeof(struct inet6_timewait_sock);
328 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
330 return likely(sk->sk_state != TCP_TIME_WAIT) ?
331 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
334 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
336 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
339 static inline int inet_v6_ipv6only(const struct sock *sk)
341 return likely(sk->sk_state != TCP_TIME_WAIT) ?
342 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
345 #define __ipv6_only_sock(sk) 0
346 #define ipv6_only_sock(sk) 0
348 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
353 static inline struct inet6_request_sock *
354 inet6_rsk(const struct request_sock *rsk)
359 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
364 #define __inet6_rcv_saddr(__sk) NULL
365 #define inet6_rcv_saddr(__sk) NULL
366 #define tcp_twsk_ipv6only(__sk) 0
367 #define inet_v6_ipv6only(__sk) 0
368 #endif /* IS_ENABLED(CONFIG_IPV6) */
370 #define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
371 ((inet_sk(__sk)->inet_portpair == (__ports)) && \
372 ((__sk)->sk_family == AF_INET6) && \
373 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
374 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
375 (!(__sk)->sk_bound_dev_if || \
376 ((__sk)->sk_bound_dev_if == (__dif))) && \
377 net_eq(sock_net(__sk), (__net)))
379 #define INET6_TW_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
380 ((inet_twsk(__sk)->tw_portpair == (__ports)) && \
381 ((__sk)->sk_family == AF_INET6) && \
382 ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr)) && \
383 ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr)) && \
384 (!(__sk)->sk_bound_dev_if || \
385 ((__sk)->sk_bound_dev_if == (__dif))) && \
386 net_eq(sock_net(__sk), (__net)))