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;
150 #ifdef CONFIG_IPV6_ROUTER_PREF
151 __s32 accept_ra_rtr_pref;
152 __s32 rtr_probe_interval;
157 /* index values for the variables in ipv6_devconf */
159 DEVCONF_FORWARDING = 0,
163 DEVCONF_ACCEPT_REDIRECTS,
165 DEVCONF_DAD_TRANSMITS,
166 DEVCONF_RTR_SOLICITS,
167 DEVCONF_RTR_SOLICIT_INTERVAL,
168 DEVCONF_RTR_SOLICIT_DELAY,
169 DEVCONF_USE_TEMPADDR,
170 DEVCONF_TEMP_VALID_LFT,
171 DEVCONF_TEMP_PREFERED_LFT,
172 DEVCONF_REGEN_MAX_RETRY,
173 DEVCONF_MAX_DESYNC_FACTOR,
174 DEVCONF_MAX_ADDRESSES,
175 DEVCONF_FORCE_MLD_VERSION,
176 DEVCONF_ACCEPT_RA_DEFRTR,
177 DEVCONF_ACCEPT_RA_PINFO,
178 DEVCONF_ACCEPT_RA_RTR_PREF,
179 DEVCONF_RTR_PROBE_INTERVAL,
184 #include <linux/icmpv6.h>
185 #include <linux/tcp.h>
186 #include <linux/udp.h>
188 #include <net/if_inet6.h> /* struct ipv6_mc_socklist */
189 #include <net/inet_sock.h>
192 This structure contains results of exthdrs parsing
193 as offsets from skb->nh.
196 struct inet6_skb_parm {
207 #define IP6SKB_XFRM_TRANSFORMED 1
210 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
212 static inline int inet6_iif(const struct sk_buff *skb)
214 return IP6CB(skb)->iif;
217 struct inet6_request_sock {
218 struct in6_addr loc_addr;
219 struct in6_addr rmt_addr;
220 struct sk_buff *pktopts;
224 struct tcp6_request_sock {
225 struct tcp_request_sock tcp6rsk_tcp;
226 struct inet6_request_sock tcp6rsk_inet6;
230 * struct ipv6_pinfo - ipv6 private area
232 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
233 * this _must_ be the last member, so that inet6_sk_generic
234 * is able to calculate its offset from the base struct sock
235 * by using the struct proto->slab_obj_size member. -acme
238 struct in6_addr saddr;
239 struct in6_addr rcv_saddr;
240 struct in6_addr daddr;
241 struct in6_addr *daddr_cache;
249 /* pktoption flags */
278 struct ipv6_mc_socklist *ipv6_mc_list;
279 struct ipv6_ac_socklist *ipv6_ac_list;
280 struct ipv6_fl_socklist *ipv6_fl_list;
282 struct ipv6_txoptions *opt;
283 struct sk_buff *pktoptions;
285 struct ipv6_txoptions *opt;
292 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
294 /* inet_sock has to be the first member of raw6_sock */
295 struct inet_sock inet;
296 __u32 checksum; /* perform checksum */
297 __u32 offset; /* checksum offset */
298 struct icmp6_filter filter;
299 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
300 struct ipv6_pinfo inet6;
305 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
306 struct ipv6_pinfo inet6;
311 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
312 struct ipv6_pinfo inet6;
315 extern int inet6_sk_rebuild_header(struct sock *sk);
317 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
318 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
320 return inet_sk(__sk)->pinet6;
323 static inline struct inet6_request_sock *
324 inet6_rsk(const struct request_sock *rsk)
326 return (struct inet6_request_sock *)(((u8 *)rsk) +
327 inet_rsk(rsk)->inet6_rsk_offset);
330 static inline u32 inet6_rsk_offset(struct request_sock *rsk)
332 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
335 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
337 struct request_sock *req = reqsk_alloc(ops);
340 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
345 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
347 return (struct raw6_sock *)sk;
350 static inline void inet_sk_copy_descendant(struct sock *sk_to,
351 const struct sock *sk_from)
353 int ancestor_size = sizeof(struct inet_sock);
355 if (sk_from->sk_family == PF_INET6)
356 ancestor_size += sizeof(struct ipv6_pinfo);
358 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
361 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
362 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
364 struct inet6_timewait_sock {
365 struct in6_addr tw_v6_daddr;
366 struct in6_addr tw_v6_rcv_saddr;
369 struct tcp6_timewait_sock {
370 struct tcp_timewait_sock tcp6tw_tcp;
371 struct inet6_timewait_sock tcp6tw_inet6;
374 static inline u16 inet6_tw_offset(const struct proto *prot)
376 return prot->twsk_prot->twsk_obj_size -
377 sizeof(struct inet6_timewait_sock);
380 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
382 return (struct inet6_timewait_sock *)(((u8 *)sk) +
383 inet_twsk(sk)->tw_ipv6_offset);
386 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
388 return likely(sk->sk_state != TCP_TIME_WAIT) ?
389 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
392 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
394 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
397 static inline int inet_v6_ipv6only(const struct sock *sk)
399 return likely(sk->sk_state != TCP_TIME_WAIT) ?
400 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
403 #define __ipv6_only_sock(sk) 0
404 #define ipv6_only_sock(sk) 0
406 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
411 static inline struct inet6_request_sock *
412 inet6_rsk(const struct request_sock *rsk)
417 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
422 #define __inet6_rcv_saddr(__sk) NULL
423 #define inet6_rcv_saddr(__sk) NULL
424 #define tcp_twsk_ipv6only(__sk) 0
425 #define inet_v6_ipv6only(__sk) 0
426 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
428 #define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\
429 (((__sk)->sk_hash == (__hash)) && \
430 ((*((__u32 *)&(inet_sk(__sk)->dport))) == (__ports)) && \
431 ((__sk)->sk_family == AF_INET6) && \
432 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
433 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
434 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
436 #endif /* __KERNEL__ */