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_min_plen
;
41 __s32 accept_ra_rt_info_max_plen
;
45 __s32 accept_source_route
;
46 __s32 accept_ra_from_local
;
47 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
51 #ifdef CONFIG_IPV6_MROUTE
55 __s32 drop_unicast_in_l2_multicast
;
59 __s32 suppress_frag_ndisc
;
61 __s32 drop_unsolicited_na
;
62 struct ipv6_stable_secret
{
64 struct in6_addr secret
;
66 __s32 use_oif_addrs_only
;
67 __s32 keep_addr_on_down
;
69 #ifdef CONFIG_IPV6_SEG6_HMAC
70 __s32 seg6_require_hmac
;
76 struct ctl_table_header
*sysctl_header
;
83 extern struct ipv6_params ipv6_defaults
;
84 #include <linux/icmpv6.h>
85 #include <linux/tcp.h>
86 #include <linux/udp.h>
88 #include <net/inet_sock.h>
90 static inline struct ipv6hdr
*ipv6_hdr(const struct sk_buff
*skb
)
92 return (struct ipv6hdr
*)skb_network_header(skb
);
95 static inline struct ipv6hdr
*inner_ipv6_hdr(const struct sk_buff
*skb
)
97 return (struct ipv6hdr
*)skb_inner_network_header(skb
);
100 static inline struct ipv6hdr
*ipipv6_hdr(const struct sk_buff
*skb
)
102 return (struct ipv6hdr
*)skb_transport_header(skb
);
106 This structure contains results of exthdrs parsing
107 as offsets from skb->nh.
110 struct inet6_skb_parm
{
119 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
124 #define IP6SKB_XFRM_TRANSFORMED 1
125 #define IP6SKB_FORWARDED 2
126 #define IP6SKB_REROUTED 4
127 #define IP6SKB_ROUTERALERT 8
128 #define IP6SKB_FRAGMENTED 16
129 #define IP6SKB_HOPBYHOP 32
130 #define IP6SKB_L3SLAVE 64
131 #define IP6SKB_JUMBOGRAM 128
134 #if defined(CONFIG_NET_L3_MASTER_DEV)
135 static inline bool ipv6_l3mdev_skb(__u16 flags
)
137 return flags
& IP6SKB_L3SLAVE
;
140 static inline bool ipv6_l3mdev_skb(__u16 flags
)
146 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
147 #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
149 static inline int inet6_iif(const struct sk_buff
*skb
)
151 bool l3_slave
= ipv6_l3mdev_skb(IP6CB(skb
)->flags
);
153 return l3_slave
? skb
->skb_iif
: IP6CB(skb
)->iif
;
156 static inline bool inet6_is_jumbogram(const struct sk_buff
*skb
)
158 return !!(IP6CB(skb
)->flags
& IP6SKB_JUMBOGRAM
);
161 /* can not be used in TCP layer after tcp_v6_fill_cb */
162 static inline int inet6_sdif(const struct sk_buff
*skb
)
164 #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV)
165 if (skb
&& ipv6_l3mdev_skb(IP6CB(skb
)->flags
))
166 return IP6CB(skb
)->iif
;
171 /* can not be used in TCP layer after tcp_v6_fill_cb */
172 static inline bool inet6_exact_dif_match(struct net
*net
, struct sk_buff
*skb
)
174 #if defined(CONFIG_NET_L3_MASTER_DEV)
175 if (!net
->ipv4
.sysctl_tcp_l3mdev_accept
&&
176 skb
&& ipv6_l3mdev_skb(IP6CB(skb
)->flags
))
182 struct tcp6_request_sock
{
183 struct tcp_request_sock tcp6rsk_tcp
;
186 struct ipv6_mc_socklist
;
187 struct ipv6_ac_socklist
;
188 struct ipv6_fl_socklist
;
191 struct ipv6_txoptions
*opt
;
197 * struct ipv6_pinfo - ipv6 private area
199 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
200 * this _must_ be the last member, so that inet6_sk_generic
201 * is able to calculate its offset from the base struct sock
202 * by using the struct proto->slab_obj_size member. -acme
205 struct in6_addr saddr
;
206 struct in6_pktinfo sticky_pktinfo
;
207 const struct in6_addr
*daddr_cache
;
208 #ifdef CONFIG_IPV6_SUBTREES
209 const struct in6_addr
*saddr_cache
;
217 * Omit one shift by by putting the signed field at MSB.
219 #if defined(__BIG_ENDIAN_BITFIELD)
227 #if defined(__BIG_ENDIAN_BITFIELD)
228 /* Packed in 16bits. */
240 /* pktoption flags */
268 padding
:1, /* 1 bit hole */
269 srcprefs
:3, /* 001: prefer temporary address
270 * 010: prefer public address
271 * 100: prefer care-of address
282 struct ipv6_mc_socklist __rcu
*ipv6_mc_list
;
283 struct ipv6_ac_socklist
*ipv6_ac_list
;
284 struct ipv6_fl_socklist __rcu
*ipv6_fl_list
;
286 struct ipv6_txoptions __rcu
*opt
;
287 struct sk_buff
*pktoptions
;
288 struct sk_buff
*rxpmtu
;
289 struct inet6_cork cork
;
292 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
294 /* inet_sock has to be the first member of raw6_sock */
295 struct inet_sock inet
;
296 __u32 checksum
; /* perform checksum */
297 __u32 offset
; /* checksum offset */
298 struct icmp6_filter filter
;
300 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
301 struct ipv6_pinfo inet6
;
306 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
307 struct ipv6_pinfo inet6
;
312 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
313 struct ipv6_pinfo inet6
;
316 extern int inet6_sk_rebuild_header(struct sock
*sk
);
318 struct tcp6_timewait_sock
{
319 struct tcp_timewait_sock tcp6tw_tcp
;
322 #if IS_ENABLED(CONFIG_IPV6)
323 bool ipv6_mod_enabled(void);
325 static inline struct ipv6_pinfo
*inet6_sk(const struct sock
*__sk
)
327 return sk_fullsock(__sk
) ? inet_sk(__sk
)->pinet6
: NULL
;
330 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
332 return (struct raw6_sock
*)sk
;
335 static inline void inet_sk_copy_descendant(struct sock
*sk_to
,
336 const struct sock
*sk_from
)
338 int ancestor_size
= sizeof(struct inet_sock
);
340 if (sk_from
->sk_family
== PF_INET6
)
341 ancestor_size
+= sizeof(struct ipv6_pinfo
);
343 __inet_sk_copy_descendant(sk_to
, sk_from
, ancestor_size
);
346 #define __ipv6_only_sock(sk) (sk->sk_ipv6only)
347 #define ipv6_only_sock(sk) (__ipv6_only_sock(sk))
348 #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \
349 inet6_sk(sk)->rxopt.bits.rxinfo)
351 static inline const struct in6_addr
*inet6_rcv_saddr(const struct sock
*sk
)
353 if (sk
->sk_family
== AF_INET6
)
354 return &sk
->sk_v6_rcv_saddr
;
358 static inline int inet_v6_ipv6only(const struct sock
*sk
)
360 /* ipv6only field is at same position for timewait and other sockets */
361 return ipv6_only_sock(sk
);
364 #define __ipv6_only_sock(sk) 0
365 #define ipv6_only_sock(sk) 0
366 #define ipv6_sk_rxinfo(sk) 0
368 static inline bool ipv6_mod_enabled(void)
373 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
378 static inline struct inet6_request_sock
*
379 inet6_rsk(const struct request_sock
*rsk
)
384 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
389 #define inet6_rcv_saddr(__sk) NULL
390 #define tcp_twsk_ipv6only(__sk) 0
391 #define inet_v6_ipv6only(__sk) 0
392 #endif /* IS_ENABLED(CONFIG_IPV6) */