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_delay
;
22 __s32 force_mld_version
;
23 __s32 mldv1_unsolicited_report_interval
;
24 __s32 mldv2_unsolicited_report_interval
;
27 __s32 temp_prefered_lft
;
28 __s32 regen_max_retry
;
29 __s32 max_desync_factor
;
31 __s32 accept_ra_defrtr
;
32 __s32 accept_ra_min_hop_limit
;
33 __s32 accept_ra_pinfo
;
34 __s32 ignore_routes_with_linkdown
;
35 #ifdef CONFIG_IPV6_ROUTER_PREF
36 __s32 accept_ra_rtr_pref
;
37 __s32 rtr_probe_interval
;
38 #ifdef CONFIG_IPV6_ROUTE_INFO
39 __s32 accept_ra_rt_info_max_plen
;
43 __s32 accept_source_route
;
44 __s32 accept_ra_from_local
;
45 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
49 #ifdef CONFIG_IPV6_MROUTE
53 __s32 drop_unicast_in_l2_multicast
;
57 __s32 suppress_frag_ndisc
;
59 __s32 drop_unsolicited_na
;
60 struct ipv6_stable_secret
{
62 struct in6_addr secret
;
64 __s32 use_oif_addrs_only
;
65 __s32 keep_addr_on_down
;
67 struct ctl_table_header
*sysctl_header
;
74 extern struct ipv6_params ipv6_defaults
;
75 #include <linux/icmpv6.h>
76 #include <linux/tcp.h>
77 #include <linux/udp.h>
79 #include <net/inet_sock.h>
81 static inline struct ipv6hdr
*ipv6_hdr(const struct sk_buff
*skb
)
83 return (struct ipv6hdr
*)skb_network_header(skb
);
86 static inline struct ipv6hdr
*inner_ipv6_hdr(const struct sk_buff
*skb
)
88 return (struct ipv6hdr
*)skb_inner_network_header(skb
);
91 static inline struct ipv6hdr
*ipipv6_hdr(const struct sk_buff
*skb
)
93 return (struct ipv6hdr
*)skb_transport_header(skb
);
97 This structure contains results of exthdrs parsing
98 as offsets from skb->nh.
101 struct inet6_skb_parm
{
110 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
115 #define IP6SKB_XFRM_TRANSFORMED 1
116 #define IP6SKB_FORWARDED 2
117 #define IP6SKB_REROUTED 4
118 #define IP6SKB_ROUTERALERT 8
119 #define IP6SKB_FRAGMENTED 16
120 #define IP6SKB_HOPBYHOP 32
121 #define IP6SKB_L3SLAVE 64
124 #if defined(CONFIG_NET_L3_MASTER_DEV)
125 static inline bool skb_l3mdev_slave(__u16 flags
)
127 return flags
& IP6SKB_L3SLAVE
;
130 static inline bool skb_l3mdev_slave(__u16 flags
)
136 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
137 #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
139 static inline int inet6_iif(const struct sk_buff
*skb
)
141 bool l3_slave
= skb_l3mdev_slave(IP6CB(skb
)->flags
);
143 return l3_slave
? skb
->skb_iif
: IP6CB(skb
)->iif
;
146 struct tcp6_request_sock
{
147 struct tcp_request_sock tcp6rsk_tcp
;
150 struct ipv6_mc_socklist
;
151 struct ipv6_ac_socklist
;
152 struct ipv6_fl_socklist
;
155 struct ipv6_txoptions
*opt
;
161 * struct ipv6_pinfo - ipv6 private area
163 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
164 * this _must_ be the last member, so that inet6_sk_generic
165 * is able to calculate its offset from the base struct sock
166 * by using the struct proto->slab_obj_size member. -acme
169 struct in6_addr saddr
;
170 struct in6_pktinfo sticky_pktinfo
;
171 const struct in6_addr
*daddr_cache
;
172 #ifdef CONFIG_IPV6_SUBTREES
173 const struct in6_addr
*saddr_cache
;
181 * Omit one shift by by putting the signed field at MSB.
183 #if defined(__BIG_ENDIAN_BITFIELD)
191 #if defined(__BIG_ENDIAN_BITFIELD)
192 /* Packed in 16bits. */
204 /* pktoption flags */
231 padding
:1, /* 1 bit hole */
232 srcprefs
:3, /* 001: prefer temporary address
233 * 010: prefer public address
234 * 100: prefer care-of address
245 struct ipv6_mc_socklist __rcu
*ipv6_mc_list
;
246 struct ipv6_ac_socklist
*ipv6_ac_list
;
247 struct ipv6_fl_socklist __rcu
*ipv6_fl_list
;
249 struct ipv6_txoptions __rcu
*opt
;
250 struct sk_buff
*pktoptions
;
251 struct sk_buff
*rxpmtu
;
252 struct inet6_cork cork
;
255 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
257 /* inet_sock has to be the first member of raw6_sock */
258 struct inet_sock inet
;
259 __u32 checksum
; /* perform checksum */
260 __u32 offset
; /* checksum offset */
261 struct icmp6_filter filter
;
263 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
264 struct ipv6_pinfo inet6
;
269 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
270 struct ipv6_pinfo inet6
;
275 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
276 struct ipv6_pinfo inet6
;
279 extern int inet6_sk_rebuild_header(struct sock
*sk
);
281 struct tcp6_timewait_sock
{
282 struct tcp_timewait_sock tcp6tw_tcp
;
285 #if IS_ENABLED(CONFIG_IPV6)
286 static inline struct ipv6_pinfo
*inet6_sk(const struct sock
*__sk
)
288 return sk_fullsock(__sk
) ? inet_sk(__sk
)->pinet6
: NULL
;
291 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
293 return (struct raw6_sock
*)sk
;
296 static inline void inet_sk_copy_descendant(struct sock
*sk_to
,
297 const struct sock
*sk_from
)
299 int ancestor_size
= sizeof(struct inet_sock
);
301 if (sk_from
->sk_family
== PF_INET6
)
302 ancestor_size
+= sizeof(struct ipv6_pinfo
);
304 __inet_sk_copy_descendant(sk_to
, sk_from
, ancestor_size
);
307 #define __ipv6_only_sock(sk) (sk->sk_ipv6only)
308 #define ipv6_only_sock(sk) (__ipv6_only_sock(sk))
309 #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \
310 inet6_sk(sk)->rxopt.bits.rxinfo)
312 static inline const struct in6_addr
*inet6_rcv_saddr(const struct sock
*sk
)
314 if (sk
->sk_family
== AF_INET6
)
315 return &sk
->sk_v6_rcv_saddr
;
319 static inline int inet_v6_ipv6only(const struct sock
*sk
)
321 /* ipv6only field is at same position for timewait and other sockets */
322 return ipv6_only_sock(sk
);
325 #define __ipv6_only_sock(sk) 0
326 #define ipv6_only_sock(sk) 0
327 #define ipv6_sk_rxinfo(sk) 0
329 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
334 static inline struct inet6_request_sock
*
335 inet6_rsk(const struct request_sock
*rsk
)
340 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
345 #define inet6_rcv_saddr(__sk) NULL
346 #define tcp_twsk_ipv6only(__sk) 0
347 #define inet_v6_ipv6only(__sk) 0
348 #endif /* IS_ENABLED(CONFIG_IPV6) */