4 #include <linux/config.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 /* this hop must be a neighbor */
32 #define IPV6_SRCRT_TYPE_0 0 /* IPv6 type 0 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
77 struct ipv6_auth_hdr {
79 __u8 hdrlen; /* This one is measured in 32 bit units! */
82 __u32 seq_no; /* Sequence number */
83 __u8 auth_data[0]; /* Length variable but >=4. Mind the 64 bit alignment! */
88 __u32 seq_no; /* Sequence number */
89 __u8 enc_data[0]; /* Length variable but >=8. Mind the 64 bit alignment! */
92 struct ipv6_comp_hdr {
101 * BEWARE, it is incorrect. The first 4 bits of flow_lbl
102 * are glued to priority now, forming "class".
106 #if defined(__LITTLE_ENDIAN_BITFIELD)
109 #elif defined(__BIG_ENDIAN_BITFIELD)
113 #error "Please fix <asm/byteorder.h>"
121 struct in6_addr saddr;
122 struct in6_addr daddr;
126 * This structure contains configuration options per IPv6 link.
128 struct ipv6_devconf {
133 __s32 accept_redirects;
137 __s32 rtr_solicit_interval;
138 __s32 rtr_solicit_delay;
139 __s32 force_mld_version;
140 #ifdef CONFIG_IPV6_PRIVACY
142 __s32 temp_valid_lft;
143 __s32 temp_prefered_lft;
144 __s32 regen_max_retry;
145 __s32 max_desync_factor;
148 __s32 accept_ra_defrtr;
149 __s32 accept_ra_pinfo;
153 /* index values for the variables in ipv6_devconf */
155 DEVCONF_FORWARDING = 0,
159 DEVCONF_ACCEPT_REDIRECTS,
161 DEVCONF_DAD_TRANSMITS,
162 DEVCONF_RTR_SOLICITS,
163 DEVCONF_RTR_SOLICIT_INTERVAL,
164 DEVCONF_RTR_SOLICIT_DELAY,
165 DEVCONF_USE_TEMPADDR,
166 DEVCONF_TEMP_VALID_LFT,
167 DEVCONF_TEMP_PREFERED_LFT,
168 DEVCONF_REGEN_MAX_RETRY,
169 DEVCONF_MAX_DESYNC_FACTOR,
170 DEVCONF_MAX_ADDRESSES,
171 DEVCONF_FORCE_MLD_VERSION,
172 DEVCONF_ACCEPT_RA_DEFRTR,
173 DEVCONF_ACCEPT_RA_PINFO,
178 #include <linux/icmpv6.h>
179 #include <linux/tcp.h>
180 #include <linux/udp.h>
182 #include <net/if_inet6.h> /* struct ipv6_mc_socklist */
183 #include <net/inet_sock.h>
186 This structure contains results of exthdrs parsing
187 as offsets from skb->nh.
190 struct inet6_skb_parm {
201 #define IP6SKB_XFRM_TRANSFORMED 1
204 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
206 static inline int inet6_iif(const struct sk_buff *skb)
208 return IP6CB(skb)->iif;
211 struct inet6_request_sock {
212 struct in6_addr loc_addr;
213 struct in6_addr rmt_addr;
214 struct sk_buff *pktopts;
218 struct tcp6_request_sock {
219 struct tcp_request_sock tcp6rsk_tcp;
220 struct inet6_request_sock tcp6rsk_inet6;
224 * struct ipv6_pinfo - ipv6 private area
226 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
227 * this _must_ be the last member, so that inet6_sk_generic
228 * is able to calculate its offset from the base struct sock
229 * by using the struct proto->slab_obj_size member. -acme
232 struct in6_addr saddr;
233 struct in6_addr rcv_saddr;
234 struct in6_addr daddr;
235 struct in6_addr *daddr_cache;
243 /* pktoption flags */
272 struct ipv6_mc_socklist *ipv6_mc_list;
273 struct ipv6_ac_socklist *ipv6_ac_list;
274 struct ipv6_fl_socklist *ipv6_fl_list;
276 struct ipv6_txoptions *opt;
277 struct sk_buff *pktoptions;
279 struct ipv6_txoptions *opt;
286 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
288 /* inet_sock has to be the first member of raw6_sock */
289 struct inet_sock inet;
290 __u32 checksum; /* perform checksum */
291 __u32 offset; /* checksum offset */
292 struct icmp6_filter filter;
293 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
294 struct ipv6_pinfo inet6;
299 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
300 struct ipv6_pinfo inet6;
305 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
306 struct ipv6_pinfo inet6;
309 extern int inet6_sk_rebuild_header(struct sock *sk);
311 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
312 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
314 return inet_sk(__sk)->pinet6;
317 static inline struct inet6_request_sock *
318 inet6_rsk(const struct request_sock *rsk)
320 return (struct inet6_request_sock *)(((u8 *)rsk) +
321 inet_rsk(rsk)->inet6_rsk_offset);
324 static inline u32 inet6_rsk_offset(struct request_sock *rsk)
326 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
329 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
331 struct request_sock *req = reqsk_alloc(ops);
334 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
339 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
341 return (struct raw6_sock *)sk;
344 static inline void inet_sk_copy_descendant(struct sock *sk_to,
345 const struct sock *sk_from)
347 int ancestor_size = sizeof(struct inet_sock);
349 if (sk_from->sk_family == PF_INET6)
350 ancestor_size += sizeof(struct ipv6_pinfo);
352 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
355 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
356 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
358 struct inet6_timewait_sock {
359 struct in6_addr tw_v6_daddr;
360 struct in6_addr tw_v6_rcv_saddr;
363 struct tcp6_timewait_sock {
364 struct tcp_timewait_sock tcp6tw_tcp;
365 struct inet6_timewait_sock tcp6tw_inet6;
368 static inline u16 inet6_tw_offset(const struct proto *prot)
370 return prot->twsk_prot->twsk_obj_size -
371 sizeof(struct inet6_timewait_sock);
374 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
376 return (struct inet6_timewait_sock *)(((u8 *)sk) +
377 inet_twsk(sk)->tw_ipv6_offset);
380 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
382 return likely(sk->sk_state != TCP_TIME_WAIT) ?
383 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
386 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
388 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
391 static inline int inet_v6_ipv6only(const struct sock *sk)
393 return likely(sk->sk_state != TCP_TIME_WAIT) ?
394 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
397 #define __ipv6_only_sock(sk) 0
398 #define ipv6_only_sock(sk) 0
400 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
405 static inline struct inet6_request_sock *
406 inet6_rsk(const struct request_sock *rsk)
411 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
416 #define __inet6_rcv_saddr(__sk) NULL
417 #define inet6_rcv_saddr(__sk) NULL
418 #define tcp_twsk_ipv6only(__sk) 0
419 #define inet_v6_ipv6only(__sk) 0
420 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
422 #define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\
423 (((__sk)->sk_hash == (__hash)) && \
424 ((*((__u32 *)&(inet_sk(__sk)->dport))) == (__ports)) && \
425 ((__sk)->sk_family == AF_INET6) && \
426 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
427 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
428 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
430 #endif /* __KERNEL__ */