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
58 extern struct ipv6_params ipv6_defaults;
59 #include <linux/icmpv6.h>
60 #include <linux/tcp.h>
61 #include <linux/udp.h>
63 #include <net/inet_sock.h>
65 static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
67 return (struct ipv6hdr *)skb_network_header(skb);
70 static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb)
72 return (struct ipv6hdr *)skb_inner_network_header(skb);
75 static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
77 return (struct ipv6hdr *)skb_transport_header(skb);
81 This structure contains results of exthdrs parsing
82 as offsets from skb->nh.
85 struct inet6_skb_parm {
95 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
100 #define IP6SKB_XFRM_TRANSFORMED 1
101 #define IP6SKB_FORWARDED 2
102 #define IP6SKB_REROUTED 4
105 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
106 #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
108 static inline int inet6_iif(const struct sk_buff *skb)
110 return IP6CB(skb)->iif;
113 struct inet6_request_sock {
114 struct in6_addr loc_addr;
115 struct in6_addr rmt_addr;
116 struct sk_buff *pktopts;
120 struct tcp6_request_sock {
121 struct tcp_request_sock tcp6rsk_tcp;
122 struct inet6_request_sock tcp6rsk_inet6;
125 struct ipv6_mc_socklist;
126 struct ipv6_ac_socklist;
127 struct ipv6_fl_socklist;
130 * struct ipv6_pinfo - ipv6 private area
132 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
133 * this _must_ be the last member, so that inet6_sk_generic
134 * is able to calculate its offset from the base struct sock
135 * by using the struct proto->slab_obj_size member. -acme
138 struct in6_addr saddr;
139 struct in6_addr rcv_saddr;
140 struct in6_addr daddr;
141 struct in6_pktinfo sticky_pktinfo;
142 const struct in6_addr *daddr_cache;
143 #ifdef CONFIG_IPV6_SUBTREES
144 const struct in6_addr *saddr_cache;
152 * Omit one shift by by putting the signed field at MSB.
154 #if defined(__BIG_ENDIAN_BITFIELD)
162 #if defined(__BIG_ENDIAN_BITFIELD)
163 /* Packed in 16bits. */
175 /* pktoption flags */
202 srcprefs:3, /* 001: prefer temporary address
203 * 010: prefer public address
204 * 100: prefer care-of address
214 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
215 struct ipv6_ac_socklist *ipv6_ac_list;
216 struct ipv6_fl_socklist *ipv6_fl_list;
218 struct ipv6_txoptions *opt;
219 struct sk_buff *pktoptions;
220 struct sk_buff *rxpmtu;
222 struct ipv6_txoptions *opt;
228 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
230 /* inet_sock has to be the first member of raw6_sock */
231 struct inet_sock inet;
232 __u32 checksum; /* perform checksum */
233 __u32 offset; /* checksum offset */
234 struct icmp6_filter filter;
236 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
237 struct ipv6_pinfo inet6;
242 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
243 struct ipv6_pinfo inet6;
248 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
249 struct ipv6_pinfo inet6;
252 extern int inet6_sk_rebuild_header(struct sock *sk);
254 struct inet6_timewait_sock {
255 struct in6_addr tw_v6_daddr;
256 struct in6_addr tw_v6_rcv_saddr;
259 struct tcp6_timewait_sock {
260 struct tcp_timewait_sock tcp6tw_tcp;
261 struct inet6_timewait_sock tcp6tw_inet6;
264 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
266 return (struct inet6_timewait_sock *)(((u8 *)sk) +
267 inet_twsk(sk)->tw_ipv6_offset);
270 #if IS_ENABLED(CONFIG_IPV6)
271 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
273 return inet_sk(__sk)->pinet6;
276 static inline struct inet6_request_sock *
277 inet6_rsk(const struct request_sock *rsk)
279 return (struct inet6_request_sock *)(((u8 *)rsk) +
280 inet_rsk(rsk)->inet6_rsk_offset);
283 static inline u32 inet6_rsk_offset(struct request_sock *rsk)
285 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
288 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
290 struct request_sock *req = reqsk_alloc(ops);
293 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
294 inet6_rsk(req)->pktopts = NULL;
300 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
302 return (struct raw6_sock *)sk;
305 static inline void inet_sk_copy_descendant(struct sock *sk_to,
306 const struct sock *sk_from)
308 int ancestor_size = sizeof(struct inet_sock);
310 if (sk_from->sk_family == PF_INET6)
311 ancestor_size += sizeof(struct ipv6_pinfo);
313 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
316 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
317 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
319 static inline u16 inet6_tw_offset(const struct proto *prot)
321 return prot->twsk_prot->twsk_obj_size -
322 sizeof(struct inet6_timewait_sock);
325 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
327 return likely(sk->sk_state != TCP_TIME_WAIT) ?
328 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
331 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
333 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
336 static inline int inet_v6_ipv6only(const struct sock *sk)
338 return likely(sk->sk_state != TCP_TIME_WAIT) ?
339 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
342 #define __ipv6_only_sock(sk) 0
343 #define ipv6_only_sock(sk) 0
345 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
350 static inline struct inet6_request_sock *
351 inet6_rsk(const struct request_sock *rsk)
356 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
361 #define __inet6_rcv_saddr(__sk) NULL
362 #define inet6_rcv_saddr(__sk) NULL
363 #define tcp_twsk_ipv6only(__sk) 0
364 #define inet_v6_ipv6only(__sk) 0
365 #endif /* IS_ENABLED(CONFIG_IPV6) */
367 #define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
368 ((inet_sk(__sk)->inet_portpair == (__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 || \
373 ((__sk)->sk_bound_dev_if == (__dif))) && \
374 net_eq(sock_net(__sk), (__net)))
376 #define INET6_TW_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
377 ((inet_twsk(__sk)->tw_portpair == (__ports)) && \
378 ((__sk)->sk_family == AF_INET6) && \
379 ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr)) && \
380 ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr)) && \
381 (!(__sk)->sk_bound_dev_if || \
382 ((__sk)->sk_bound_dev_if == (__dif))) && \
383 net_eq(sock_net(__sk), (__net)))