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) */