4 #include <linux/types.h>
6 #include <asm/byteorder.h>
8 /* The latest drafts declared increase in minimal mtu up to 1280. */
10 #define IPV6_MIN_MTU 1280
14 * source interface/address selection, source routing, etc...
15 * *under construction*
20 struct in6_addr ipi6_addr;
25 struct sockaddr_in6 ip6m_addr;
30 struct in6_addr ifr6_addr;
35 #define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */
36 #define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */
37 #define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
50 * variable length field
59 * TLV encoded option data follows.
61 } __attribute__((packed)); /* required for some archs */
63 #define ipv6_destopt_hdr ipv6_opt_hdr
64 #define ipv6_hopopt_hdr ipv6_opt_hdr
67 #define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
71 * routing header type 0 (used in cmsghdr struct)
75 struct ipv6_rt_hdr rt_hdr;
77 struct in6_addr addr[0];
79 #define rt0_type rt_hdr.type
83 * routing header type 2
87 struct ipv6_rt_hdr rt_hdr;
91 #define rt2_type rt_hdr.type
95 * home address option in destination options header
98 struct ipv6_destopt_hao {
101 struct in6_addr addr;
102 } __attribute__((packed));
107 * BEWARE, it is incorrect. The first 4 bits of flow_lbl
108 * are glued to priority now, forming "class".
112 #if defined(__LITTLE_ENDIAN_BITFIELD)
115 #elif defined(__BIG_ENDIAN_BITFIELD)
119 #error "Please fix <asm/byteorder.h>"
127 struct in6_addr saddr;
128 struct in6_addr daddr;
133 * This structure contains configuration options per IPv6 link.
135 struct ipv6_devconf {
140 __s32 accept_redirects;
144 __s32 rtr_solicit_interval;
145 __s32 rtr_solicit_delay;
146 __s32 force_mld_version;
147 #ifdef CONFIG_IPV6_PRIVACY
149 __s32 temp_valid_lft;
150 __s32 temp_prefered_lft;
151 __s32 regen_max_retry;
152 __s32 max_desync_factor;
155 __s32 accept_ra_defrtr;
156 __s32 accept_ra_min_hop_limit;
157 __s32 accept_ra_pinfo;
158 #ifdef CONFIG_IPV6_ROUTER_PREF
159 __s32 accept_ra_rtr_pref;
160 __s32 rtr_probe_interval;
161 #ifdef CONFIG_IPV6_ROUTE_INFO
162 __s32 accept_ra_rt_info_max_plen;
166 __s32 accept_source_route;
167 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
168 __s32 optimistic_dad;
170 #ifdef CONFIG_IPV6_MROUTE
183 extern struct ipv6_params ipv6_defaults;
186 /* index values for the variables in ipv6_devconf */
188 DEVCONF_FORWARDING = 0,
192 DEVCONF_ACCEPT_REDIRECTS,
194 DEVCONF_DAD_TRANSMITS,
195 DEVCONF_RTR_SOLICITS,
196 DEVCONF_RTR_SOLICIT_INTERVAL,
197 DEVCONF_RTR_SOLICIT_DELAY,
198 DEVCONF_USE_TEMPADDR,
199 DEVCONF_TEMP_VALID_LFT,
200 DEVCONF_TEMP_PREFERED_LFT,
201 DEVCONF_REGEN_MAX_RETRY,
202 DEVCONF_MAX_DESYNC_FACTOR,
203 DEVCONF_MAX_ADDRESSES,
204 DEVCONF_FORCE_MLD_VERSION,
205 DEVCONF_ACCEPT_RA_DEFRTR,
206 DEVCONF_ACCEPT_RA_PINFO,
207 DEVCONF_ACCEPT_RA_RTR_PREF,
208 DEVCONF_RTR_PROBE_INTERVAL,
209 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
211 DEVCONF_OPTIMISTIC_DAD,
212 DEVCONF_ACCEPT_SOURCE_ROUTE,
213 DEVCONF_MC_FORWARDING,
214 DEVCONF_DISABLE_IPV6,
217 DEVCONF_USE_OIF_ADDRS_ONLY = 37,
218 DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT,
223 #include <linux/icmpv6.h>
224 #include <linux/tcp.h>
225 #include <linux/udp.h>
227 #include <net/inet_sock.h>
229 static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
231 return (struct ipv6hdr *)skb_network_header(skb);
234 static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
236 return (struct ipv6hdr *)skb_transport_header(skb);
240 This structure contains results of exthdrs parsing
241 as offsets from skb->nh.
244 struct inet6_skb_parm {
254 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
258 #define IP6SKB_XFRM_TRANSFORMED 1
259 #define IP6SKB_FORWARDED 2
260 #define IP6SKB_REROUTED 4
261 #define IP6SKB_FRAGMENTED 16
264 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
265 #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
267 static inline int inet6_iif(const struct sk_buff *skb)
269 return IP6CB(skb)->iif;
272 struct inet6_request_sock {
273 struct in6_addr loc_addr;
274 struct in6_addr rmt_addr;
275 struct sk_buff *pktopts;
279 struct tcp6_request_sock {
280 struct tcp_request_sock tcp6rsk_tcp;
281 struct inet6_request_sock tcp6rsk_inet6;
284 struct ipv6_mc_socklist;
285 struct ipv6_ac_socklist;
286 struct ipv6_fl_socklist;
289 * struct ipv6_pinfo - ipv6 private area
291 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
292 * this _must_ be the last member, so that inet6_sk_generic
293 * is able to calculate its offset from the base struct sock
294 * by using the struct proto->slab_obj_size member. -acme
297 struct in6_addr saddr;
298 struct in6_addr rcv_saddr;
299 struct in6_addr daddr;
300 struct in6_pktinfo sticky_pktinfo;
301 struct in6_addr *daddr_cache;
302 #ifdef CONFIG_IPV6_SUBTREES
303 struct in6_addr *saddr_cache;
311 * Omit one shift by by putting the signed field at MSB.
313 #if defined(__BIG_ENDIAN_BITFIELD)
321 #if defined(__BIG_ENDIAN_BITFIELD)
322 /* Packed in 16bits. */
333 /* pktoption flags */
360 srcprefs:3, /* 001: prefer temporary address
361 * 010: prefer public address
362 * 100: prefer care-of address
371 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
372 struct ipv6_ac_socklist *ipv6_ac_list;
373 struct ipv6_fl_socklist *ipv6_fl_list;
375 struct ipv6_txoptions __rcu *opt;
376 struct sk_buff *pktoptions;
377 struct sk_buff *rxpmtu;
379 struct ipv6_txoptions *opt;
385 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
387 /* inet_sock has to be the first member of raw6_sock */
388 struct inet_sock inet;
389 __u32 checksum; /* perform checksum */
390 __u32 offset; /* checksum offset */
391 struct icmp6_filter filter;
393 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
394 struct ipv6_pinfo inet6;
399 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
400 struct ipv6_pinfo inet6;
405 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
406 struct ipv6_pinfo inet6;
409 extern int inet6_sk_rebuild_header(struct sock *sk);
411 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
412 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
414 return inet_sk(__sk)->pinet6;
417 static inline struct inet6_request_sock *
418 inet6_rsk(const struct request_sock *rsk)
420 return (struct inet6_request_sock *)(((u8 *)rsk) +
421 inet_rsk(rsk)->inet6_rsk_offset);
424 static inline u32 inet6_rsk_offset(struct request_sock *rsk)
426 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
429 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
431 struct request_sock *req = reqsk_alloc(ops);
434 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
435 inet6_rsk(req)->pktopts = NULL;
441 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
443 return (struct raw6_sock *)sk;
446 static inline void inet_sk_copy_descendant(struct sock *sk_to,
447 const struct sock *sk_from)
449 int ancestor_size = sizeof(struct inet_sock);
451 if (sk_from->sk_family == PF_INET6)
452 ancestor_size += sizeof(struct ipv6_pinfo);
454 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
457 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
458 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
460 struct inet6_timewait_sock {
461 struct in6_addr tw_v6_daddr;
462 struct in6_addr tw_v6_rcv_saddr;
465 struct tcp6_timewait_sock {
466 struct tcp_timewait_sock tcp6tw_tcp;
467 struct inet6_timewait_sock tcp6tw_inet6;
470 static inline u16 inet6_tw_offset(const struct proto *prot)
472 return prot->twsk_prot->twsk_obj_size -
473 sizeof(struct inet6_timewait_sock);
476 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
478 return (struct inet6_timewait_sock *)(((u8 *)sk) +
479 inet_twsk(sk)->tw_ipv6_offset);
482 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
484 return likely(sk->sk_state != TCP_TIME_WAIT) ?
485 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
488 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
490 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
493 static inline int inet_v6_ipv6only(const struct sock *sk)
495 return likely(sk->sk_state != TCP_TIME_WAIT) ?
496 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
499 #define __ipv6_only_sock(sk) 0
500 #define ipv6_only_sock(sk) 0
502 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
507 static inline struct inet6_request_sock *
508 inet6_rsk(const struct request_sock *rsk)
513 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
518 #define __inet6_rcv_saddr(__sk) NULL
519 #define inet6_rcv_saddr(__sk) NULL
520 #define tcp_twsk_ipv6only(__sk) 0
521 #define inet_v6_ipv6only(__sk) 0
522 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
524 #define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\
525 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
526 ((*((__portpair *)&(inet_sk(__sk)->inet_dport))) == (__ports)) && \
527 ((__sk)->sk_family == AF_INET6) && \
528 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
529 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
530 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
532 #define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \
533 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
534 (*((__portpair *)&(inet_twsk(__sk)->tw_dport)) == (__ports)) && \
535 ((__sk)->sk_family == PF_INET6) && \
536 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr))) && \
537 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr))) && \
538 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
540 #endif /* __KERNEL__ */