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;
26 struct in6_addr ifr6_addr;
31 #define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */
32 #define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */
33 #define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
46 * variable length field
55 * TLV encoded option data follows.
57 } __attribute__ ((packed)); /* required for some archs */
59 #define ipv6_destopt_hdr ipv6_opt_hdr
60 #define ipv6_hopopt_hdr ipv6_opt_hdr
63 #define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
67 * routing header type 0 (used in cmsghdr struct)
71 struct ipv6_rt_hdr rt_hdr;
73 struct in6_addr addr[0];
75 #define rt0_type rt_hdr.type
79 * routing header type 2
83 struct ipv6_rt_hdr rt_hdr;
87 #define rt2_type rt_hdr.type
91 * home address option in destination options header
94 struct ipv6_destopt_hao {
98 } __attribute__ ((__packed__));
103 * BEWARE, it is incorrect. The first 4 bits of flow_lbl
104 * are glued to priority now, forming "class".
108 #if defined(__LITTLE_ENDIAN_BITFIELD)
111 #elif defined(__BIG_ENDIAN_BITFIELD)
115 #error "Please fix <asm/byteorder.h>"
123 struct in6_addr saddr;
124 struct in6_addr daddr;
129 * This structure contains configuration options per IPv6 link.
131 struct ipv6_devconf {
136 __s32 accept_redirects;
140 __s32 rtr_solicit_interval;
141 __s32 rtr_solicit_delay;
142 __s32 force_mld_version;
143 #ifdef CONFIG_IPV6_PRIVACY
145 __s32 temp_valid_lft;
146 __s32 temp_prefered_lft;
147 __s32 regen_max_retry;
148 __s32 max_desync_factor;
151 __s32 accept_ra_defrtr;
152 __s32 accept_ra_pinfo;
153 #ifdef CONFIG_IPV6_ROUTER_PREF
154 __s32 accept_ra_rtr_pref;
155 __s32 rtr_probe_interval;
156 #ifdef CONFIG_IPV6_ROUTE_INFO
157 __s32 accept_ra_rt_info_max_plen;
161 __s32 accept_source_route;
162 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
163 __s32 optimistic_dad;
165 #ifdef CONFIG_IPV6_MROUTE
178 extern struct ipv6_params ipv6_defaults;
181 /* index values for the variables in ipv6_devconf */
183 DEVCONF_FORWARDING = 0,
187 DEVCONF_ACCEPT_REDIRECTS,
189 DEVCONF_DAD_TRANSMITS,
190 DEVCONF_RTR_SOLICITS,
191 DEVCONF_RTR_SOLICIT_INTERVAL,
192 DEVCONF_RTR_SOLICIT_DELAY,
193 DEVCONF_USE_TEMPADDR,
194 DEVCONF_TEMP_VALID_LFT,
195 DEVCONF_TEMP_PREFERED_LFT,
196 DEVCONF_REGEN_MAX_RETRY,
197 DEVCONF_MAX_DESYNC_FACTOR,
198 DEVCONF_MAX_ADDRESSES,
199 DEVCONF_FORCE_MLD_VERSION,
200 DEVCONF_ACCEPT_RA_DEFRTR,
201 DEVCONF_ACCEPT_RA_PINFO,
202 DEVCONF_ACCEPT_RA_RTR_PREF,
203 DEVCONF_RTR_PROBE_INTERVAL,
204 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
206 DEVCONF_OPTIMISTIC_DAD,
207 DEVCONF_ACCEPT_SOURCE_ROUTE,
208 DEVCONF_MC_FORWARDING,
209 DEVCONF_DISABLE_IPV6,
215 #include <linux/icmpv6.h>
216 #include <linux/tcp.h>
217 #include <linux/udp.h>
219 #include <net/inet_sock.h>
221 static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
223 return (struct ipv6hdr *)skb_network_header(skb);
226 static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
228 return (struct ipv6hdr *)skb_transport_header(skb);
232 This structure contains results of exthdrs parsing
233 as offsets from skb->nh.
236 struct inet6_skb_parm {
246 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
250 #define IP6SKB_XFRM_TRANSFORMED 1
251 #define IP6SKB_FORWARDED 2
254 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
256 static inline int inet6_iif(const struct sk_buff *skb)
258 return IP6CB(skb)->iif;
261 struct inet6_request_sock {
262 struct in6_addr loc_addr;
263 struct in6_addr rmt_addr;
264 struct sk_buff *pktopts;
268 struct tcp6_request_sock {
269 struct tcp_request_sock tcp6rsk_tcp;
270 struct inet6_request_sock tcp6rsk_inet6;
273 struct ipv6_mc_socklist;
274 struct ipv6_ac_socklist;
275 struct ipv6_fl_socklist;
278 * struct ipv6_pinfo - ipv6 private area
280 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
281 * this _must_ be the last member, so that inet6_sk_generic
282 * is able to calculate its offset from the base struct sock
283 * by using the struct proto->slab_obj_size member. -acme
286 struct in6_addr saddr;
287 struct in6_addr rcv_saddr;
288 struct in6_addr daddr;
289 struct in6_pktinfo sticky_pktinfo;
290 struct in6_addr *daddr_cache;
291 #ifdef CONFIG_IPV6_SUBTREES
292 struct in6_addr *saddr_cache;
300 * Omit one shift by by putting the signed field at MSB.
302 #if defined(__BIG_ENDIAN_BITFIELD)
310 #if defined(__BIG_ENDIAN_BITFIELD)
311 /* Packed in 16bits. */
322 /* pktoption flags */
346 srcprefs:3; /* 001: prefer temporary address
347 * 010: prefer public address
348 * 100: prefer care-of address
354 struct ipv6_mc_socklist *ipv6_mc_list;
355 struct ipv6_ac_socklist *ipv6_ac_list;
356 struct ipv6_fl_socklist *ipv6_fl_list;
358 struct ipv6_txoptions *opt;
359 struct sk_buff *pktoptions;
361 struct ipv6_txoptions *opt;
367 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
369 /* inet_sock has to be the first member of raw6_sock */
370 struct inet_sock inet;
371 __u32 checksum; /* perform checksum */
372 __u32 offset; /* checksum offset */
373 struct icmp6_filter filter;
374 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
375 struct ipv6_pinfo inet6;
380 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
381 struct ipv6_pinfo inet6;
386 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
387 struct ipv6_pinfo inet6;
390 extern int inet6_sk_rebuild_header(struct sock *sk);
392 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
393 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
395 return inet_sk(__sk)->pinet6;
398 static inline struct inet6_request_sock *
399 inet6_rsk(const struct request_sock *rsk)
401 return (struct inet6_request_sock *)(((u8 *)rsk) +
402 inet_rsk(rsk)->inet6_rsk_offset);
405 static inline u32 inet6_rsk_offset(struct request_sock *rsk)
407 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
410 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
412 struct request_sock *req = reqsk_alloc(ops);
415 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
416 inet6_rsk(req)->pktopts = NULL;
422 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
424 return (struct raw6_sock *)sk;
427 static inline void inet_sk_copy_descendant(struct sock *sk_to,
428 const struct sock *sk_from)
430 int ancestor_size = sizeof(struct inet_sock);
432 if (sk_from->sk_family == PF_INET6)
433 ancestor_size += sizeof(struct ipv6_pinfo);
435 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
438 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
439 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
441 struct inet6_timewait_sock {
442 struct in6_addr tw_v6_daddr;
443 struct in6_addr tw_v6_rcv_saddr;
446 struct tcp6_timewait_sock {
447 struct tcp_timewait_sock tcp6tw_tcp;
448 struct inet6_timewait_sock tcp6tw_inet6;
451 static inline u16 inet6_tw_offset(const struct proto *prot)
453 return prot->twsk_prot->twsk_obj_size -
454 sizeof(struct inet6_timewait_sock);
457 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
459 return (struct inet6_timewait_sock *)(((u8 *)sk) +
460 inet_twsk(sk)->tw_ipv6_offset);
463 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
465 return likely(sk->sk_state != TCP_TIME_WAIT) ?
466 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
469 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
471 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
474 static inline int inet_v6_ipv6only(const struct sock *sk)
476 return likely(sk->sk_state != TCP_TIME_WAIT) ?
477 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
480 #define __ipv6_only_sock(sk) 0
481 #define ipv6_only_sock(sk) 0
483 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
488 static inline struct inet6_request_sock *
489 inet6_rsk(const struct request_sock *rsk)
494 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
499 #define __inet6_rcv_saddr(__sk) NULL
500 #define inet6_rcv_saddr(__sk) NULL
501 #define tcp_twsk_ipv6only(__sk) 0
502 #define inet_v6_ipv6only(__sk) 0
503 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
505 #define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\
506 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
507 ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports)) && \
508 ((__sk)->sk_family == AF_INET6) && \
509 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
510 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
511 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
513 #define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \
514 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
515 (*((__portpair *)&(inet_twsk(__sk)->tw_dport)) == (__ports)) && \
516 ((__sk)->sk_family == PF_INET6) && \
517 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr))) && \
518 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr))) && \
519 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
521 #endif /* __KERNEL__ */