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 #ifdef CONFIG_IPV6_SEG6_HMAC
69 __s32 seg6_require_hmac
;
74 struct ctl_table_header
*sysctl_header
;
81 extern struct ipv6_params ipv6_defaults
;
82 #include <linux/icmpv6.h>
83 #include <linux/tcp.h>
84 #include <linux/udp.h>
86 #include <net/inet_sock.h>
88 static inline struct ipv6hdr
*ipv6_hdr(const struct sk_buff
*skb
)
90 return (struct ipv6hdr
*)skb_network_header(skb
);
93 static inline struct ipv6hdr
*inner_ipv6_hdr(const struct sk_buff
*skb
)
95 return (struct ipv6hdr
*)skb_inner_network_header(skb
);
98 static inline struct ipv6hdr
*ipipv6_hdr(const struct sk_buff
*skb
)
100 return (struct ipv6hdr
*)skb_transport_header(skb
);
104 This structure contains results of exthdrs parsing
105 as offsets from skb->nh.
108 struct inet6_skb_parm
{
117 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
122 #define IP6SKB_XFRM_TRANSFORMED 1
123 #define IP6SKB_FORWARDED 2
124 #define IP6SKB_REROUTED 4
125 #define IP6SKB_ROUTERALERT 8
126 #define IP6SKB_FRAGMENTED 16
127 #define IP6SKB_HOPBYHOP 32
128 #define IP6SKB_L3SLAVE 64
131 #if defined(CONFIG_NET_L3_MASTER_DEV)
132 static inline bool ipv6_l3mdev_skb(__u16 flags
)
134 return flags
& IP6SKB_L3SLAVE
;
137 static inline bool ipv6_l3mdev_skb(__u16 flags
)
143 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
144 #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
146 static inline int inet6_iif(const struct sk_buff
*skb
)
148 bool l3_slave
= ipv6_l3mdev_skb(IP6CB(skb
)->flags
);
150 return l3_slave
? skb
->skb_iif
: IP6CB(skb
)->iif
;
153 /* can not be used in TCP layer after tcp_v6_fill_cb */
154 static inline bool inet6_exact_dif_match(struct net
*net
, struct sk_buff
*skb
)
156 #if defined(CONFIG_NET_L3_MASTER_DEV)
157 if (!net
->ipv4
.sysctl_tcp_l3mdev_accept
&&
158 skb
&& ipv6_l3mdev_skb(IP6CB(skb
)->flags
))
164 struct tcp6_request_sock
{
165 struct tcp_request_sock tcp6rsk_tcp
;
168 struct ipv6_mc_socklist
;
169 struct ipv6_ac_socklist
;
170 struct ipv6_fl_socklist
;
173 struct ipv6_txoptions
*opt
;
179 * struct ipv6_pinfo - ipv6 private area
181 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
182 * this _must_ be the last member, so that inet6_sk_generic
183 * is able to calculate its offset from the base struct sock
184 * by using the struct proto->slab_obj_size member. -acme
187 struct in6_addr saddr
;
188 struct in6_pktinfo sticky_pktinfo
;
189 const struct in6_addr
*daddr_cache
;
190 #ifdef CONFIG_IPV6_SUBTREES
191 const struct in6_addr
*saddr_cache
;
199 * Omit one shift by by putting the signed field at MSB.
201 #if defined(__BIG_ENDIAN_BITFIELD)
209 #if defined(__BIG_ENDIAN_BITFIELD)
210 /* Packed in 16bits. */
222 /* pktoption flags */
250 padding
:1, /* 1 bit hole */
251 srcprefs
:3, /* 001: prefer temporary address
252 * 010: prefer public address
253 * 100: prefer care-of address
264 struct ipv6_mc_socklist __rcu
*ipv6_mc_list
;
265 struct ipv6_ac_socklist
*ipv6_ac_list
;
266 struct ipv6_fl_socklist __rcu
*ipv6_fl_list
;
268 struct ipv6_txoptions __rcu
*opt
;
269 struct sk_buff
*pktoptions
;
270 struct sk_buff
*rxpmtu
;
271 struct inet6_cork cork
;
274 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
276 /* inet_sock has to be the first member of raw6_sock */
277 struct inet_sock inet
;
278 __u32 checksum
; /* perform checksum */
279 __u32 offset
; /* checksum offset */
280 struct icmp6_filter filter
;
282 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
283 struct ipv6_pinfo inet6
;
288 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
289 struct ipv6_pinfo inet6
;
294 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
295 struct ipv6_pinfo inet6
;
298 extern int inet6_sk_rebuild_header(struct sock
*sk
);
300 struct tcp6_timewait_sock
{
301 struct tcp_timewait_sock tcp6tw_tcp
;
304 #if IS_ENABLED(CONFIG_IPV6)
305 bool ipv6_mod_enabled(void);
307 static inline struct ipv6_pinfo
*inet6_sk(const struct sock
*__sk
)
309 return sk_fullsock(__sk
) ? inet_sk(__sk
)->pinet6
: NULL
;
312 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
314 return (struct raw6_sock
*)sk
;
317 static inline void inet_sk_copy_descendant(struct sock
*sk_to
,
318 const struct sock
*sk_from
)
320 int ancestor_size
= sizeof(struct inet_sock
);
322 if (sk_from
->sk_family
== PF_INET6
)
323 ancestor_size
+= sizeof(struct ipv6_pinfo
);
325 __inet_sk_copy_descendant(sk_to
, sk_from
, ancestor_size
);
328 #define __ipv6_only_sock(sk) (sk->sk_ipv6only)
329 #define ipv6_only_sock(sk) (__ipv6_only_sock(sk))
330 #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \
331 inet6_sk(sk)->rxopt.bits.rxinfo)
333 static inline const struct in6_addr
*inet6_rcv_saddr(const struct sock
*sk
)
335 if (sk
->sk_family
== AF_INET6
)
336 return &sk
->sk_v6_rcv_saddr
;
340 static inline int inet_v6_ipv6only(const struct sock
*sk
)
342 /* ipv6only field is at same position for timewait and other sockets */
343 return ipv6_only_sock(sk
);
346 #define __ipv6_only_sock(sk) 0
347 #define ipv6_only_sock(sk) 0
348 #define ipv6_sk_rxinfo(sk) 0
350 static inline bool ipv6_mod_enabled(void)
355 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
360 static inline struct inet6_request_sock
*
361 inet6_rsk(const struct request_sock
*rsk
)
366 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
371 #define inet6_rcv_saddr(__sk) NULL
372 #define tcp_twsk_ipv6only(__sk) 0
373 #define inet_v6_ipv6only(__sk) 0
374 #endif /* IS_ENABLED(CONFIG_IPV6) */