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 */
44 * variable length field
53 * TLV encoded option data follows.
57 #define ipv6_destopt_hdr ipv6_opt_hdr
58 #define ipv6_hopopt_hdr ipv6_opt_hdr
61 #define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
65 * routing header type 0 (used in cmsghdr struct)
69 struct ipv6_rt_hdr rt_hdr;
71 struct in6_addr addr[0];
73 #define rt0_type rt_hdr.type
76 struct ipv6_auth_hdr {
78 __u8 hdrlen; /* This one is measured in 32 bit units! */
81 __u32 seq_no; /* Sequence number */
82 __u8 auth_data[0]; /* Length variable but >=4. Mind the 64 bit alignment! */
87 __u32 seq_no; /* Sequence number */
88 __u8 enc_data[0]; /* Length variable but >=8. Mind the 64 bit alignment! */
91 struct ipv6_comp_hdr {
100 * BEWARE, it is incorrect. The first 4 bits of flow_lbl
101 * are glued to priority now, forming "class".
105 #if defined(__LITTLE_ENDIAN_BITFIELD)
108 #elif defined(__BIG_ENDIAN_BITFIELD)
112 #error "Please fix <asm/byteorder.h>"
120 struct in6_addr saddr;
121 struct in6_addr daddr;
125 * This structure contains configuration options per IPv6 link.
127 struct ipv6_devconf {
132 __s32 accept_redirects;
136 __s32 rtr_solicit_interval;
137 __s32 rtr_solicit_delay;
138 __s32 force_mld_version;
139 #ifdef CONFIG_IPV6_PRIVACY
141 __s32 temp_valid_lft;
142 __s32 temp_prefered_lft;
143 __s32 regen_max_retry;
144 __s32 max_desync_factor;
147 __s32 accept_ra_defrtr;
148 __s32 accept_ra_pinfo;
149 #ifdef CONFIG_IPV6_ROUTER_PREF
150 __s32 accept_ra_rtr_pref;
151 __s32 rtr_probe_interval;
152 #ifdef CONFIG_IPV6_ROUTE_INFO
153 __s32 accept_ra_rt_info_max_plen;
159 /* index values for the variables in ipv6_devconf */
161 DEVCONF_FORWARDING = 0,
165 DEVCONF_ACCEPT_REDIRECTS,
167 DEVCONF_DAD_TRANSMITS,
168 DEVCONF_RTR_SOLICITS,
169 DEVCONF_RTR_SOLICIT_INTERVAL,
170 DEVCONF_RTR_SOLICIT_DELAY,
171 DEVCONF_USE_TEMPADDR,
172 DEVCONF_TEMP_VALID_LFT,
173 DEVCONF_TEMP_PREFERED_LFT,
174 DEVCONF_REGEN_MAX_RETRY,
175 DEVCONF_MAX_DESYNC_FACTOR,
176 DEVCONF_MAX_ADDRESSES,
177 DEVCONF_FORCE_MLD_VERSION,
178 DEVCONF_ACCEPT_RA_DEFRTR,
179 DEVCONF_ACCEPT_RA_PINFO,
180 DEVCONF_ACCEPT_RA_RTR_PREF,
181 DEVCONF_RTR_PROBE_INTERVAL,
182 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
187 #include <linux/icmpv6.h>
188 #include <linux/tcp.h>
189 #include <linux/udp.h>
191 #include <net/if_inet6.h> /* struct ipv6_mc_socklist */
192 #include <net/inet_sock.h>
195 This structure contains results of exthdrs parsing
196 as offsets from skb->nh.
199 struct inet6_skb_parm {
210 #define IP6SKB_XFRM_TRANSFORMED 1
213 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
215 static inline int inet6_iif(const struct sk_buff *skb)
217 return IP6CB(skb)->iif;
220 struct inet6_request_sock {
221 struct in6_addr loc_addr;
222 struct in6_addr rmt_addr;
223 struct sk_buff *pktopts;
227 struct tcp6_request_sock {
228 struct tcp_request_sock tcp6rsk_tcp;
229 struct inet6_request_sock tcp6rsk_inet6;
233 * struct ipv6_pinfo - ipv6 private area
235 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
236 * this _must_ be the last member, so that inet6_sk_generic
237 * is able to calculate its offset from the base struct sock
238 * by using the struct proto->slab_obj_size member. -acme
241 struct in6_addr saddr;
242 struct in6_addr rcv_saddr;
243 struct in6_addr daddr;
244 struct in6_addr *daddr_cache;
252 /* pktoption flags */
281 struct ipv6_mc_socklist *ipv6_mc_list;
282 struct ipv6_ac_socklist *ipv6_ac_list;
283 struct ipv6_fl_socklist *ipv6_fl_list;
285 struct ipv6_txoptions *opt;
286 struct sk_buff *pktoptions;
288 struct ipv6_txoptions *opt;
295 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
297 /* inet_sock has to be the first member of raw6_sock */
298 struct inet_sock inet;
299 __u32 checksum; /* perform checksum */
300 __u32 offset; /* checksum offset */
301 struct icmp6_filter filter;
302 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
303 struct ipv6_pinfo inet6;
308 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
309 struct ipv6_pinfo inet6;
314 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
315 struct ipv6_pinfo inet6;
318 extern int inet6_sk_rebuild_header(struct sock *sk);
320 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
321 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
323 return inet_sk(__sk)->pinet6;
326 static inline struct inet6_request_sock *
327 inet6_rsk(const struct request_sock *rsk)
329 return (struct inet6_request_sock *)(((u8 *)rsk) +
330 inet_rsk(rsk)->inet6_rsk_offset);
333 static inline u32 inet6_rsk_offset(struct request_sock *rsk)
335 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
338 static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
340 struct request_sock *req = reqsk_alloc(ops);
343 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
348 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
350 return (struct raw6_sock *)sk;
353 static inline void inet_sk_copy_descendant(struct sock *sk_to,
354 const struct sock *sk_from)
356 int ancestor_size = sizeof(struct inet_sock);
358 if (sk_from->sk_family == PF_INET6)
359 ancestor_size += sizeof(struct ipv6_pinfo);
361 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
364 #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
365 #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
367 struct inet6_timewait_sock {
368 struct in6_addr tw_v6_daddr;
369 struct in6_addr tw_v6_rcv_saddr;
372 struct tcp6_timewait_sock {
373 struct tcp_timewait_sock tcp6tw_tcp;
374 struct inet6_timewait_sock tcp6tw_inet6;
377 static inline u16 inet6_tw_offset(const struct proto *prot)
379 return prot->twsk_prot->twsk_obj_size -
380 sizeof(struct inet6_timewait_sock);
383 static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
385 return (struct inet6_timewait_sock *)(((u8 *)sk) +
386 inet_twsk(sk)->tw_ipv6_offset);
389 static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
391 return likely(sk->sk_state != TCP_TIME_WAIT) ?
392 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
395 static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
397 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
400 static inline int inet_v6_ipv6only(const struct sock *sk)
402 return likely(sk->sk_state != TCP_TIME_WAIT) ?
403 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
406 #define __ipv6_only_sock(sk) 0
407 #define ipv6_only_sock(sk) 0
409 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
414 static inline struct inet6_request_sock *
415 inet6_rsk(const struct request_sock *rsk)
420 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
425 #define __inet6_rcv_saddr(__sk) NULL
426 #define inet6_rcv_saddr(__sk) NULL
427 #define tcp_twsk_ipv6only(__sk) 0
428 #define inet_v6_ipv6only(__sk) 0
429 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
431 #define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\
432 (((__sk)->sk_hash == (__hash)) && \
433 ((*((__u32 *)&(inet_sk(__sk)->dport))) == (__ports)) && \
434 ((__sk)->sk_family == AF_INET6) && \
435 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
436 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
437 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
439 #endif /* __KERNEL__ */