4 #include <uapi/linux/ipv6.h>
6 #define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
7 #define ipv6_authlen(p) (((p)->hdrlen+2) << 2)
9 * This structure contains configuration options per IPv6 link.
16 __s32 accept_redirects
;
20 __s32 rtr_solicit_interval
;
21 __s32 rtr_solicit_max_interval
;
22 __s32 rtr_solicit_delay
;
23 __s32 force_mld_version
;
24 __s32 mldv1_unsolicited_report_interval
;
25 __s32 mldv2_unsolicited_report_interval
;
28 __s32 temp_prefered_lft
;
29 __s32 regen_max_retry
;
30 __s32 max_desync_factor
;
32 __s32 accept_ra_defrtr
;
33 __s32 accept_ra_min_hop_limit
;
34 __s32 accept_ra_pinfo
;
35 __s32 ignore_routes_with_linkdown
;
36 #ifdef CONFIG_IPV6_ROUTER_PREF
37 __s32 accept_ra_rtr_pref
;
38 __s32 rtr_probe_interval
;
39 #ifdef CONFIG_IPV6_ROUTE_INFO
40 __s32 accept_ra_rt_info_max_plen
;
44 __s32 accept_source_route
;
45 __s32 accept_ra_from_local
;
46 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
50 #ifdef CONFIG_IPV6_MROUTE
54 __s32 drop_unicast_in_l2_multicast
;
58 __s32 suppress_frag_ndisc
;
60 __s32 drop_unsolicited_na
;
61 struct ipv6_stable_secret
{
63 struct in6_addr secret
;
65 __s32 use_oif_addrs_only
;
66 __s32 keep_addr_on_down
;
68 struct ctl_table_header
*sysctl_header
;
75 extern struct ipv6_params ipv6_defaults
;
76 #include <linux/icmpv6.h>
77 #include <linux/tcp.h>
78 #include <linux/udp.h>
80 #include <net/inet_sock.h>
82 static inline struct ipv6hdr
*ipv6_hdr(const struct sk_buff
*skb
)
84 return (struct ipv6hdr
*)skb_network_header(skb
);
87 static inline struct ipv6hdr
*inner_ipv6_hdr(const struct sk_buff
*skb
)
89 return (struct ipv6hdr
*)skb_inner_network_header(skb
);
92 static inline struct ipv6hdr
*ipipv6_hdr(const struct sk_buff
*skb
)
94 return (struct ipv6hdr
*)skb_transport_header(skb
);
98 This structure contains results of exthdrs parsing
99 as offsets from skb->nh.
102 struct inet6_skb_parm
{
111 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
116 #define IP6SKB_XFRM_TRANSFORMED 1
117 #define IP6SKB_FORWARDED 2
118 #define IP6SKB_REROUTED 4
119 #define IP6SKB_ROUTERALERT 8
120 #define IP6SKB_FRAGMENTED 16
121 #define IP6SKB_HOPBYHOP 32
122 #define IP6SKB_L3SLAVE 64
125 #if defined(CONFIG_NET_L3_MASTER_DEV)
126 static inline bool skb_l3mdev_slave(__u16 flags
)
128 return flags
& IP6SKB_L3SLAVE
;
131 static inline bool skb_l3mdev_slave(__u16 flags
)
137 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
138 #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
140 static inline int inet6_iif(const struct sk_buff
*skb
)
142 bool l3_slave
= skb_l3mdev_slave(IP6CB(skb
)->flags
);
144 return l3_slave
? skb
->skb_iif
: IP6CB(skb
)->iif
;
147 struct tcp6_request_sock
{
148 struct tcp_request_sock tcp6rsk_tcp
;
151 struct ipv6_mc_socklist
;
152 struct ipv6_ac_socklist
;
153 struct ipv6_fl_socklist
;
156 struct ipv6_txoptions
*opt
;
162 * struct ipv6_pinfo - ipv6 private area
164 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
165 * this _must_ be the last member, so that inet6_sk_generic
166 * is able to calculate its offset from the base struct sock
167 * by using the struct proto->slab_obj_size member. -acme
170 struct in6_addr saddr
;
171 struct in6_pktinfo sticky_pktinfo
;
172 const struct in6_addr
*daddr_cache
;
173 #ifdef CONFIG_IPV6_SUBTREES
174 const struct in6_addr
*saddr_cache
;
182 * Omit one shift by by putting the signed field at MSB.
184 #if defined(__BIG_ENDIAN_BITFIELD)
192 #if defined(__BIG_ENDIAN_BITFIELD)
193 /* Packed in 16bits. */
205 /* pktoption flags */
232 padding
:1, /* 1 bit hole */
233 srcprefs
:3, /* 001: prefer temporary address
234 * 010: prefer public address
235 * 100: prefer care-of address
246 struct ipv6_mc_socklist __rcu
*ipv6_mc_list
;
247 struct ipv6_ac_socklist
*ipv6_ac_list
;
248 struct ipv6_fl_socklist __rcu
*ipv6_fl_list
;
250 struct ipv6_txoptions __rcu
*opt
;
251 struct sk_buff
*pktoptions
;
252 struct sk_buff
*rxpmtu
;
253 struct inet6_cork cork
;
256 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
258 /* inet_sock has to be the first member of raw6_sock */
259 struct inet_sock inet
;
260 __u32 checksum
; /* perform checksum */
261 __u32 offset
; /* checksum offset */
262 struct icmp6_filter filter
;
264 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
265 struct ipv6_pinfo inet6
;
270 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
271 struct ipv6_pinfo inet6
;
276 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
277 struct ipv6_pinfo inet6
;
280 extern int inet6_sk_rebuild_header(struct sock
*sk
);
282 struct tcp6_timewait_sock
{
283 struct tcp_timewait_sock tcp6tw_tcp
;
286 #if IS_ENABLED(CONFIG_IPV6)
287 bool ipv6_mod_enabled(void);
289 static inline struct ipv6_pinfo
*inet6_sk(const struct sock
*__sk
)
291 return sk_fullsock(__sk
) ? inet_sk(__sk
)->pinet6
: NULL
;
294 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
296 return (struct raw6_sock
*)sk
;
299 static inline void inet_sk_copy_descendant(struct sock
*sk_to
,
300 const struct sock
*sk_from
)
302 int ancestor_size
= sizeof(struct inet_sock
);
304 if (sk_from
->sk_family
== PF_INET6
)
305 ancestor_size
+= sizeof(struct ipv6_pinfo
);
307 __inet_sk_copy_descendant(sk_to
, sk_from
, ancestor_size
);
310 #define __ipv6_only_sock(sk) (sk->sk_ipv6only)
311 #define ipv6_only_sock(sk) (__ipv6_only_sock(sk))
312 #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \
313 inet6_sk(sk)->rxopt.bits.rxinfo)
315 static inline const struct in6_addr
*inet6_rcv_saddr(const struct sock
*sk
)
317 if (sk
->sk_family
== AF_INET6
)
318 return &sk
->sk_v6_rcv_saddr
;
322 static inline int inet_v6_ipv6only(const struct sock
*sk
)
324 /* ipv6only field is at same position for timewait and other sockets */
325 return ipv6_only_sock(sk
);
328 #define __ipv6_only_sock(sk) 0
329 #define ipv6_only_sock(sk) 0
330 #define ipv6_sk_rxinfo(sk) 0
332 static inline bool ipv6_mod_enabled(void)
337 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
342 static inline struct inet6_request_sock
*
343 inet6_rsk(const struct request_sock
*rsk
)
348 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
353 #define inet6_rcv_saddr(__sk) NULL
354 #define tcp_twsk_ipv6only(__sk) 0
355 #define inet_v6_ipv6only(__sk) 0
356 #endif /* IS_ENABLED(CONFIG_IPV6) */