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;
151 /* index values for the variables in ipv6_devconf */
153 DEVCONF_FORWARDING = 0,
157 DEVCONF_ACCEPT_REDIRECTS,
159 DEVCONF_DAD_TRANSMITS,
160 DEVCONF_RTR_SOLICITS,
161 DEVCONF_RTR_SOLICIT_INTERVAL,
162 DEVCONF_RTR_SOLICIT_DELAY,
163 DEVCONF_USE_TEMPADDR,
164 DEVCONF_TEMP_VALID_LFT,
165 DEVCONF_TEMP_PREFERED_LFT,
166 DEVCONF_REGEN_MAX_RETRY,
167 DEVCONF_MAX_DESYNC_FACTOR,
168 DEVCONF_MAX_ADDRESSES,
169 DEVCONF_FORCE_MLD_VERSION,
174 #include <linux/icmpv6.h>
175 #include <linux/tcp.h>
176 #include <linux/udp.h>
178 #include <net/if_inet6.h> /* struct ipv6_mc_socklist */
179 #include <net/inet_sock.h>
182 This structure contains results of exthdrs parsing
183 as offsets from skb->nh.
186 struct inet6_skb_parm {
197 #define IP6SKB_XFRM_TRANSFORMED 1
200 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
202 static inline int inet6_iif(const struct sk_buff *skb)
204 return IP6CB(skb)->iif;
207 struct inet6_request_sock {
208 struct in6_addr loc_addr;
209 struct in6_addr rmt_addr;
210 struct sk_buff *pktopts;
214 struct tcp6_request_sock {
215 struct tcp_request_sock tcp6rsk_tcp;
216 struct inet6_request_sock tcp6rsk_inet6;
220 * struct ipv6_pinfo - ipv6 private area
222 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
223 * this _must_ be the last member, so that inet6_sk_generic
224 * is able to calculate its offset from the base struct sock
225 * by using the struct proto->slab_obj_size member. -acme
228 struct in6_addr saddr;
229 struct in6_addr rcv_saddr;
230 struct in6_addr daddr;
231 struct in6_addr *daddr_cache;
239 /* pktoption flags */
268 struct ipv6_mc_socklist *ipv6_mc_list;
269 struct ipv6_ac_socklist *ipv6_ac_list;
270 struct ipv6_fl_socklist *ipv6_fl_list;
272 struct ipv6_txoptions *opt;
273 struct sk_buff *pktoptions;
275 struct ipv6_txoptions *opt;
282 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
284 /* inet_sock has to be the first member of raw6_sock */
285 struct inet_sock inet;
286 __u32 checksum; /* perform checksum */
287 __u32 offset; /* checksum offset */
288 struct icmp6_filter filter;
289 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
290 struct ipv6_pinfo inet6;
295 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
296 struct ipv6_pinfo inet6;
301 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
302 struct ipv6_pinfo inet6;
305 extern int inet6_sk_rebuild_header(struct sock *sk);
307 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
308 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
310 return inet_sk(__sk)->pinet6;
313 static inline struct inet6_request_sock *
314 inet6_rsk(const struct request_sock *rsk)
316 return (struct inet6_request_sock *)(((u8 *)rsk) +
317 inet_rsk(rsk)->inet6_rsk_offset);
320 static inline u32 inet6_rsk_offset(struct request_sock *rsk)
322 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
325 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
327 struct request_sock *req = reqsk_alloc(ops);
330 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
335 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
337 return (struct raw6_sock *)sk;
340 static inline void inet_sk_copy_descendant(struct sock *sk_to,
341 const struct sock *sk_from)
343 int ancestor_size = sizeof(struct inet_sock);
345 if (sk_from->sk_family == PF_INET6)
346 ancestor_size += sizeof(struct ipv6_pinfo);
348 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
351 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
352 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
354 struct inet6_timewait_sock {
355 struct in6_addr tw_v6_daddr;
356 struct in6_addr tw_v6_rcv_saddr;
359 struct tcp6_timewait_sock {
360 struct tcp_timewait_sock tcp6tw_tcp;
361 struct inet6_timewait_sock tcp6tw_inet6;
364 static inline u16 inet6_tw_offset(const struct proto *prot)
366 return prot->twsk_prot->twsk_obj_size -
367 sizeof(struct inet6_timewait_sock);
370 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
372 return (struct inet6_timewait_sock *)(((u8 *)sk) +
373 inet_twsk(sk)->tw_ipv6_offset);
376 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
378 return likely(sk->sk_state != TCP_TIME_WAIT) ?
379 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
382 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
384 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
387 static inline int inet_v6_ipv6only(const struct sock *sk)
389 return likely(sk->sk_state != TCP_TIME_WAIT) ?
390 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
393 #define __ipv6_only_sock(sk) 0
394 #define ipv6_only_sock(sk) 0
396 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
401 static inline struct inet6_request_sock *
402 inet6_rsk(const struct request_sock *rsk)
407 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
412 #define __inet6_rcv_saddr(__sk) NULL
413 #define inet6_rcv_saddr(__sk) NULL
414 #define tcp_twsk_ipv6only(__sk) 0
415 #define inet_v6_ipv6only(__sk) 0
416 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
418 #define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\
419 (((__sk)->sk_hash == (__hash)) && \
420 ((*((__u32 *)&(inet_sk(__sk)->dport))) == (__ports)) && \
421 ((__sk)->sk_family == AF_INET6) && \
422 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
423 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
424 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
426 #endif /* __KERNEL__ */