5 #include <asm/byteorder.h>
7 /* The latest drafts declared increase in minimal mtu up to 1280. */
9 #define IPV6_MIN_MTU 1280
13 * source interface/address selection, source routing, etc...
14 * *under construction*
19 struct in6_addr ipi6_addr;
25 struct in6_addr ifr6_addr;
30 #define IPV6_SRCRT_STRICT 0x01 /* this hop must be a neighbor */
31 #define IPV6_SRCRT_TYPE_0 0 /* IPv6 type 0 Routing Header */
32 #define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
45 * variable length field
54 * TLV encoded option data follows.
58 #define ipv6_destopt_hdr ipv6_opt_hdr
59 #define ipv6_hopopt_hdr ipv6_opt_hdr
62 #define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
66 * routing header type 0 (used in cmsghdr struct)
70 struct ipv6_rt_hdr rt_hdr;
72 struct in6_addr addr[0];
74 #define rt0_type rt_hdr.type
78 * routing header type 2
82 struct ipv6_rt_hdr rt_hdr;
86 #define rt2_type rt_hdr.type
90 * home address option in destination options header
93 struct ipv6_destopt_hao {
97 } __attribute__ ((__packed__));
99 struct ipv6_auth_hdr {
101 __u8 hdrlen; /* This one is measured in 32 bit units! */
104 __be32 seq_no; /* Sequence number */
105 __u8 auth_data[0]; /* Length variable but >=4. Mind the 64 bit alignment! */
108 struct ipv6_esp_hdr {
110 __be32 seq_no; /* Sequence number */
111 __u8 enc_data[0]; /* Length variable but >=8. Mind the 64 bit alignment! */
114 struct ipv6_comp_hdr {
123 * BEWARE, it is incorrect. The first 4 bits of flow_lbl
124 * are glued to priority now, forming "class".
128 #if defined(__LITTLE_ENDIAN_BITFIELD)
131 #elif defined(__BIG_ENDIAN_BITFIELD)
135 #error "Please fix <asm/byteorder.h>"
143 struct in6_addr saddr;
144 struct in6_addr daddr;
148 * This structure contains configuration options per IPv6 link.
150 struct ipv6_devconf {
155 __s32 accept_redirects;
159 __s32 rtr_solicit_interval;
160 __s32 rtr_solicit_delay;
161 __s32 force_mld_version;
162 #ifdef CONFIG_IPV6_PRIVACY
164 __s32 temp_valid_lft;
165 __s32 temp_prefered_lft;
166 __s32 regen_max_retry;
167 __s32 max_desync_factor;
170 __s32 accept_ra_defrtr;
171 __s32 accept_ra_pinfo;
172 #ifdef CONFIG_IPV6_ROUTER_PREF
173 __s32 accept_ra_rtr_pref;
174 __s32 rtr_probe_interval;
175 #ifdef CONFIG_IPV6_ROUTE_INFO
176 __s32 accept_ra_rt_info_max_plen;
180 __s32 accept_source_route;
181 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
182 __s32 optimistic_dad;
187 /* index values for the variables in ipv6_devconf */
189 DEVCONF_FORWARDING = 0,
193 DEVCONF_ACCEPT_REDIRECTS,
195 DEVCONF_DAD_TRANSMITS,
196 DEVCONF_RTR_SOLICITS,
197 DEVCONF_RTR_SOLICIT_INTERVAL,
198 DEVCONF_RTR_SOLICIT_DELAY,
199 DEVCONF_USE_TEMPADDR,
200 DEVCONF_TEMP_VALID_LFT,
201 DEVCONF_TEMP_PREFERED_LFT,
202 DEVCONF_REGEN_MAX_RETRY,
203 DEVCONF_MAX_DESYNC_FACTOR,
204 DEVCONF_MAX_ADDRESSES,
205 DEVCONF_FORCE_MLD_VERSION,
206 DEVCONF_ACCEPT_RA_DEFRTR,
207 DEVCONF_ACCEPT_RA_PINFO,
208 DEVCONF_ACCEPT_RA_RTR_PREF,
209 DEVCONF_RTR_PROBE_INTERVAL,
210 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
212 DEVCONF_OPTIMISTIC_DAD,
213 DEVCONF_ACCEPT_SOURCE_ROUTE,
218 #include <linux/icmpv6.h>
219 #include <linux/tcp.h>
220 #include <linux/udp.h>
222 #include <net/if_inet6.h> /* struct ipv6_mc_socklist */
223 #include <net/inet_sock.h>
225 static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
227 return (struct ipv6hdr *)skb_network_header(skb);
230 static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
232 return (struct ipv6hdr *)skb_transport_header(skb);
236 This structure contains results of exthdrs parsing
237 as offsets from skb->nh.
240 struct inet6_skb_parm {
250 #ifdef CONFIG_IPV6_MIP6
254 #define IP6SKB_XFRM_TRANSFORMED 1
257 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
259 static inline int inet6_iif(const struct sk_buff *skb)
261 return IP6CB(skb)->iif;
264 struct inet6_request_sock {
265 struct in6_addr loc_addr;
266 struct in6_addr rmt_addr;
267 struct sk_buff *pktopts;
271 struct tcp6_request_sock {
272 struct tcp_request_sock tcp6rsk_tcp;
273 struct inet6_request_sock tcp6rsk_inet6;
277 * struct ipv6_pinfo - ipv6 private area
279 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
280 * this _must_ be the last member, so that inet6_sk_generic
281 * is able to calculate its offset from the base struct sock
282 * by using the struct proto->slab_obj_size member. -acme
285 struct in6_addr saddr;
286 struct in6_addr rcv_saddr;
287 struct in6_addr daddr;
288 struct in6_addr *daddr_cache;
289 #ifdef CONFIG_IPV6_SUBTREES
290 struct in6_addr *saddr_cache;
299 /* pktoption flags */
328 struct ipv6_mc_socklist *ipv6_mc_list;
329 struct ipv6_ac_socklist *ipv6_ac_list;
330 struct ipv6_fl_socklist *ipv6_fl_list;
332 struct ipv6_txoptions *opt;
333 struct sk_buff *pktoptions;
335 struct ipv6_txoptions *opt;
342 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
344 /* inet_sock has to be the first member of raw6_sock */
345 struct inet_sock inet;
346 __u32 checksum; /* perform checksum */
347 __u32 offset; /* checksum offset */
348 struct icmp6_filter filter;
349 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
350 struct ipv6_pinfo inet6;
355 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
356 struct ipv6_pinfo inet6;
361 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
362 struct ipv6_pinfo inet6;
365 extern int inet6_sk_rebuild_header(struct sock *sk);
367 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
368 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
370 return inet_sk(__sk)->pinet6;
373 static inline struct inet6_request_sock *
374 inet6_rsk(const struct request_sock *rsk)
376 return (struct inet6_request_sock *)(((u8 *)rsk) +
377 inet_rsk(rsk)->inet6_rsk_offset);
380 static inline u32 inet6_rsk_offset(struct request_sock *rsk)
382 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
385 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
387 struct request_sock *req = reqsk_alloc(ops);
390 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
395 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
397 return (struct raw6_sock *)sk;
400 static inline void inet_sk_copy_descendant(struct sock *sk_to,
401 const struct sock *sk_from)
403 int ancestor_size = sizeof(struct inet_sock);
405 if (sk_from->sk_family == PF_INET6)
406 ancestor_size += sizeof(struct ipv6_pinfo);
408 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
411 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
412 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
414 struct inet6_timewait_sock {
415 struct in6_addr tw_v6_daddr;
416 struct in6_addr tw_v6_rcv_saddr;
419 struct tcp6_timewait_sock {
420 struct tcp_timewait_sock tcp6tw_tcp;
421 struct inet6_timewait_sock tcp6tw_inet6;
424 static inline u16 inet6_tw_offset(const struct proto *prot)
426 return prot->twsk_prot->twsk_obj_size -
427 sizeof(struct inet6_timewait_sock);
430 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
432 return (struct inet6_timewait_sock *)(((u8 *)sk) +
433 inet_twsk(sk)->tw_ipv6_offset);
436 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
438 return likely(sk->sk_state != TCP_TIME_WAIT) ?
439 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
442 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
444 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
447 static inline int inet_v6_ipv6only(const struct sock *sk)
449 return likely(sk->sk_state != TCP_TIME_WAIT) ?
450 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
453 #define __ipv6_only_sock(sk) 0
454 #define ipv6_only_sock(sk) 0
456 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
461 static inline struct inet6_request_sock *
462 inet6_rsk(const struct request_sock *rsk)
467 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
472 #define __inet6_rcv_saddr(__sk) NULL
473 #define inet6_rcv_saddr(__sk) NULL
474 #define tcp_twsk_ipv6only(__sk) 0
475 #define inet_v6_ipv6only(__sk) 0
476 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
478 #define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\
479 (((__sk)->sk_hash == (__hash)) && \
480 ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports)) && \
481 ((__sk)->sk_family == AF_INET6) && \
482 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
483 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
484 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
486 #endif /* __KERNEL__ */