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
89 struct ipv6_auth_hdr {
91 __u8 hdrlen; /* This one is measured in 32 bit units! */
94 __u32 seq_no; /* Sequence number */
95 __u8 auth_data[0]; /* Length variable but >=4. Mind the 64 bit alignment! */
100 __u32 seq_no; /* Sequence number */
101 __u8 enc_data[0]; /* Length variable but >=8. Mind the 64 bit alignment! */
104 struct ipv6_comp_hdr {
113 * BEWARE, it is incorrect. The first 4 bits of flow_lbl
114 * are glued to priority now, forming "class".
118 #if defined(__LITTLE_ENDIAN_BITFIELD)
121 #elif defined(__BIG_ENDIAN_BITFIELD)
125 #error "Please fix <asm/byteorder.h>"
133 struct in6_addr saddr;
134 struct in6_addr daddr;
138 * This structure contains configuration options per IPv6 link.
140 struct ipv6_devconf {
145 __s32 accept_redirects;
149 __s32 rtr_solicit_interval;
150 __s32 rtr_solicit_delay;
151 __s32 force_mld_version;
152 #ifdef CONFIG_IPV6_PRIVACY
154 __s32 temp_valid_lft;
155 __s32 temp_prefered_lft;
156 __s32 regen_max_retry;
157 __s32 max_desync_factor;
160 __s32 accept_ra_defrtr;
161 __s32 accept_ra_pinfo;
162 #ifdef CONFIG_IPV6_ROUTER_PREF
163 __s32 accept_ra_rtr_pref;
164 __s32 rtr_probe_interval;
165 #ifdef CONFIG_IPV6_ROUTE_INFO
166 __s32 accept_ra_rt_info_max_plen;
172 /* index values for the variables in ipv6_devconf */
174 DEVCONF_FORWARDING = 0,
178 DEVCONF_ACCEPT_REDIRECTS,
180 DEVCONF_DAD_TRANSMITS,
181 DEVCONF_RTR_SOLICITS,
182 DEVCONF_RTR_SOLICIT_INTERVAL,
183 DEVCONF_RTR_SOLICIT_DELAY,
184 DEVCONF_USE_TEMPADDR,
185 DEVCONF_TEMP_VALID_LFT,
186 DEVCONF_TEMP_PREFERED_LFT,
187 DEVCONF_REGEN_MAX_RETRY,
188 DEVCONF_MAX_DESYNC_FACTOR,
189 DEVCONF_MAX_ADDRESSES,
190 DEVCONF_FORCE_MLD_VERSION,
191 DEVCONF_ACCEPT_RA_DEFRTR,
192 DEVCONF_ACCEPT_RA_PINFO,
193 DEVCONF_ACCEPT_RA_RTR_PREF,
194 DEVCONF_RTR_PROBE_INTERVAL,
195 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
200 #include <linux/icmpv6.h>
201 #include <linux/tcp.h>
202 #include <linux/udp.h>
204 #include <net/if_inet6.h> /* struct ipv6_mc_socklist */
205 #include <net/inet_sock.h>
208 This structure contains results of exthdrs parsing
209 as offsets from skb->nh.
212 struct inet6_skb_parm {
223 #define IP6SKB_XFRM_TRANSFORMED 1
226 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
228 static inline int inet6_iif(const struct sk_buff *skb)
230 return IP6CB(skb)->iif;
233 struct inet6_request_sock {
234 struct in6_addr loc_addr;
235 struct in6_addr rmt_addr;
236 struct sk_buff *pktopts;
240 struct tcp6_request_sock {
241 struct tcp_request_sock tcp6rsk_tcp;
242 struct inet6_request_sock tcp6rsk_inet6;
246 * struct ipv6_pinfo - ipv6 private area
248 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
249 * this _must_ be the last member, so that inet6_sk_generic
250 * is able to calculate its offset from the base struct sock
251 * by using the struct proto->slab_obj_size member. -acme
254 struct in6_addr saddr;
255 struct in6_addr rcv_saddr;
256 struct in6_addr daddr;
257 struct in6_addr *daddr_cache;
258 #ifdef CONFIG_IPV6_SUBTREES
259 struct in6_addr *saddr_cache;
268 /* pktoption flags */
297 struct ipv6_mc_socklist *ipv6_mc_list;
298 struct ipv6_ac_socklist *ipv6_ac_list;
299 struct ipv6_fl_socklist *ipv6_fl_list;
301 struct ipv6_txoptions *opt;
302 struct sk_buff *pktoptions;
304 struct ipv6_txoptions *opt;
311 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
313 /* inet_sock has to be the first member of raw6_sock */
314 struct inet_sock inet;
315 __u32 checksum; /* perform checksum */
316 __u32 offset; /* checksum offset */
317 struct icmp6_filter filter;
318 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
319 struct ipv6_pinfo inet6;
324 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
325 struct ipv6_pinfo inet6;
330 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
331 struct ipv6_pinfo inet6;
334 extern int inet6_sk_rebuild_header(struct sock *sk);
336 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
337 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
339 return inet_sk(__sk)->pinet6;
342 static inline struct inet6_request_sock *
343 inet6_rsk(const struct request_sock *rsk)
345 return (struct inet6_request_sock *)(((u8 *)rsk) +
346 inet_rsk(rsk)->inet6_rsk_offset);
349 static inline u32 inet6_rsk_offset(struct request_sock *rsk)
351 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
354 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
356 struct request_sock *req = reqsk_alloc(ops);
359 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
364 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
366 return (struct raw6_sock *)sk;
369 static inline void inet_sk_copy_descendant(struct sock *sk_to,
370 const struct sock *sk_from)
372 int ancestor_size = sizeof(struct inet_sock);
374 if (sk_from->sk_family == PF_INET6)
375 ancestor_size += sizeof(struct ipv6_pinfo);
377 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
380 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
381 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
383 struct inet6_timewait_sock {
384 struct in6_addr tw_v6_daddr;
385 struct in6_addr tw_v6_rcv_saddr;
388 struct tcp6_timewait_sock {
389 struct tcp_timewait_sock tcp6tw_tcp;
390 struct inet6_timewait_sock tcp6tw_inet6;
393 static inline u16 inet6_tw_offset(const struct proto *prot)
395 return prot->twsk_prot->twsk_obj_size -
396 sizeof(struct inet6_timewait_sock);
399 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
401 return (struct inet6_timewait_sock *)(((u8 *)sk) +
402 inet_twsk(sk)->tw_ipv6_offset);
405 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
407 return likely(sk->sk_state != TCP_TIME_WAIT) ?
408 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
411 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
413 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
416 static inline int inet_v6_ipv6only(const struct sock *sk)
418 return likely(sk->sk_state != TCP_TIME_WAIT) ?
419 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
422 #define __ipv6_only_sock(sk) 0
423 #define ipv6_only_sock(sk) 0
425 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
430 static inline struct inet6_request_sock *
431 inet6_rsk(const struct request_sock *rsk)
436 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
441 #define __inet6_rcv_saddr(__sk) NULL
442 #define inet6_rcv_saddr(__sk) NULL
443 #define tcp_twsk_ipv6only(__sk) 0
444 #define inet_v6_ipv6only(__sk) 0
445 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
447 #define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\
448 (((__sk)->sk_hash == (__hash)) && \
449 ((*((__u32 *)&(inet_sk(__sk)->dport))) == (__ports)) && \
450 ((__sk)->sk_family == AF_INET6) && \
451 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
452 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
453 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
455 #endif /* __KERNEL__ */