1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <uapi/linux/ipv6.h>
7 #define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
8 #define ipv6_authlen(p) (((p)->hdrlen+2) << 2)
10 * This structure contains configuration options per IPv6 link.
17 __s32 accept_redirects
;
21 __s32 rtr_solicit_interval
;
22 __s32 rtr_solicit_max_interval
;
23 __s32 rtr_solicit_delay
;
24 __s32 force_mld_version
;
25 __s32 mldv1_unsolicited_report_interval
;
26 __s32 mldv2_unsolicited_report_interval
;
29 __s32 temp_prefered_lft
;
30 __s32 regen_max_retry
;
31 __s32 max_desync_factor
;
33 __s32 accept_ra_defrtr
;
34 __u32 ra_defrtr_metric
;
35 __s32 accept_ra_min_hop_limit
;
36 __s32 accept_ra_pinfo
;
37 __s32 ignore_routes_with_linkdown
;
38 #ifdef CONFIG_IPV6_ROUTER_PREF
39 __s32 accept_ra_rtr_pref
;
40 __s32 rtr_probe_interval
;
41 #ifdef CONFIG_IPV6_ROUTE_INFO
42 __s32 accept_ra_rt_info_min_plen
;
43 __s32 accept_ra_rt_info_max_plen
;
47 __s32 accept_source_route
;
48 __s32 accept_ra_from_local
;
49 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
53 #ifdef CONFIG_IPV6_MROUTE
57 __s32 drop_unicast_in_l2_multicast
;
61 __s32 suppress_frag_ndisc
;
63 __s32 drop_unsolicited_na
;
64 struct ipv6_stable_secret
{
66 struct in6_addr secret
;
68 __s32 use_oif_addrs_only
;
69 __s32 keep_addr_on_down
;
71 #ifdef CONFIG_IPV6_SEG6_HMAC
72 __s32 seg6_require_hmac
;
78 __s32 rpl_seg_enabled
;
83 struct ctl_table_header
*sysctl_header
;
90 extern struct ipv6_params ipv6_defaults
;
91 #include <linux/tcp.h>
92 #include <linux/udp.h>
94 #include <net/inet_sock.h>
96 static inline struct ipv6hdr
*ipv6_hdr(const struct sk_buff
*skb
)
98 return (struct ipv6hdr
*)skb_network_header(skb
);
101 static inline struct ipv6hdr
*inner_ipv6_hdr(const struct sk_buff
*skb
)
103 return (struct ipv6hdr
*)skb_inner_network_header(skb
);
106 static inline struct ipv6hdr
*ipipv6_hdr(const struct sk_buff
*skb
)
108 return (struct ipv6hdr
*)skb_transport_header(skb
);
111 static inline unsigned int ipv6_transport_len(const struct sk_buff
*skb
)
113 return ntohs(ipv6_hdr(skb
)->payload_len
) + sizeof(struct ipv6hdr
) -
114 skb_network_header_len(skb
);
118 This structure contains results of exthdrs parsing
119 as offsets from skb->nh.
122 struct inet6_skb_parm
{
131 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
136 #define IP6SKB_XFRM_TRANSFORMED 1
137 #define IP6SKB_FORWARDED 2
138 #define IP6SKB_REROUTED 4
139 #define IP6SKB_ROUTERALERT 8
140 #define IP6SKB_FRAGMENTED 16
141 #define IP6SKB_HOPBYHOP 32
142 #define IP6SKB_L3SLAVE 64
143 #define IP6SKB_JUMBOGRAM 128
146 #if defined(CONFIG_NET_L3_MASTER_DEV)
147 static inline bool ipv6_l3mdev_skb(__u16 flags
)
149 return flags
& IP6SKB_L3SLAVE
;
152 static inline bool ipv6_l3mdev_skb(__u16 flags
)
158 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
159 #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
161 static inline int inet6_iif(const struct sk_buff
*skb
)
163 bool l3_slave
= ipv6_l3mdev_skb(IP6CB(skb
)->flags
);
165 return l3_slave
? skb
->skb_iif
: IP6CB(skb
)->iif
;
168 static inline bool inet6_is_jumbogram(const struct sk_buff
*skb
)
170 return !!(IP6CB(skb
)->flags
& IP6SKB_JUMBOGRAM
);
173 /* can not be used in TCP layer after tcp_v6_fill_cb */
174 static inline int inet6_sdif(const struct sk_buff
*skb
)
176 #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV)
177 if (skb
&& ipv6_l3mdev_skb(IP6CB(skb
)->flags
))
178 return IP6CB(skb
)->iif
;
183 struct tcp6_request_sock
{
184 struct tcp_request_sock tcp6rsk_tcp
;
187 struct ipv6_mc_socklist
;
188 struct ipv6_ac_socklist
;
189 struct ipv6_fl_socklist
;
192 struct ipv6_txoptions
*opt
;
198 * struct ipv6_pinfo - ipv6 private area
200 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
201 * this _must_ be the last member, so that inet6_sk_generic
202 * is able to calculate its offset from the base struct sock
203 * by using the struct proto->slab_obj_size member. -acme
206 struct in6_addr saddr
;
207 struct in6_pktinfo sticky_pktinfo
;
208 const struct in6_addr
*daddr_cache
;
209 #ifdef CONFIG_IPV6_SUBTREES
210 const struct in6_addr
*saddr_cache
;
218 * Omit one shift by putting the signed field at MSB.
220 #if defined(__BIG_ENDIAN_BITFIELD)
228 #if defined(__BIG_ENDIAN_BITFIELD)
229 /* Packed in 16bits. */
241 /* pktoption flags */
269 padding
:1, /* 1 bit hole */
270 srcprefs
:3, /* 001: prefer temporary address
271 * 010: prefer public address
272 * 100: prefer care-of address
287 struct ipv6_mc_socklist __rcu
*ipv6_mc_list
;
288 struct ipv6_ac_socklist
*ipv6_ac_list
;
289 struct ipv6_fl_socklist __rcu
*ipv6_fl_list
;
291 struct ipv6_txoptions __rcu
*opt
;
292 struct sk_buff
*pktoptions
;
293 struct sk_buff
*rxpmtu
;
294 struct inet6_cork cork
;
297 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
299 /* inet_sock has to be the first member of raw6_sock */
300 struct inet_sock inet
;
301 __u32 checksum
; /* perform checksum */
302 __u32 offset
; /* checksum offset */
303 struct icmp6_filter filter
;
305 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
306 struct ipv6_pinfo inet6
;
311 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
312 struct ipv6_pinfo inet6
;
317 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
318 struct ipv6_pinfo inet6
;
321 extern int inet6_sk_rebuild_header(struct sock
*sk
);
323 struct tcp6_timewait_sock
{
324 struct tcp_timewait_sock tcp6tw_tcp
;
327 #if IS_ENABLED(CONFIG_IPV6)
328 bool ipv6_mod_enabled(void);
330 static inline struct ipv6_pinfo
*inet6_sk(const struct sock
*__sk
)
332 return sk_fullsock(__sk
) ? inet_sk(__sk
)->pinet6
: NULL
;
335 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
337 return (struct raw6_sock
*)sk
;
340 #define __ipv6_only_sock(sk) (sk->sk_ipv6only)
341 #define ipv6_only_sock(sk) (__ipv6_only_sock(sk))
342 #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \
343 inet6_sk(sk)->rxopt.bits.rxinfo)
345 static inline const struct in6_addr
*inet6_rcv_saddr(const struct sock
*sk
)
347 if (sk
->sk_family
== AF_INET6
)
348 return &sk
->sk_v6_rcv_saddr
;
352 static inline int inet_v6_ipv6only(const struct sock
*sk
)
354 /* ipv6only field is at same position for timewait and other sockets */
355 return ipv6_only_sock(sk
);
358 #define __ipv6_only_sock(sk) 0
359 #define ipv6_only_sock(sk) 0
360 #define ipv6_sk_rxinfo(sk) 0
362 static inline bool ipv6_mod_enabled(void)
367 static inline struct ipv6_pinfo
* inet6_sk(const struct sock
*__sk
)
372 static inline struct inet6_request_sock
*
373 inet6_rsk(const struct request_sock
*rsk
)
378 static inline struct raw6_sock
*raw6_sk(const struct sock
*sk
)
383 #define inet6_rcv_saddr(__sk) NULL
384 #define tcp_twsk_ipv6only(__sk) 0
385 #define inet_v6_ipv6only(__sk) 0
386 #endif /* IS_ENABLED(CONFIG_IPV6) */