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 bool ipv6_mod_enabled(void);
288 static inline struct ipv6_pinfo *inet6_sk(const struct sock *__sk)
290 return sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL;
293 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
295 return (struct raw6_sock *)sk;
298 static inline void inet_sk_copy_descendant(struct sock *sk_to,
299 const struct sock *sk_from)
301 int ancestor_size = sizeof(struct inet_sock);
303 if (sk_from->sk_family == PF_INET6)
304 ancestor_size += sizeof(struct ipv6_pinfo);
306 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
309 #define __ipv6_only_sock(sk) (sk->sk_ipv6only)
310 #define ipv6_only_sock(sk) (__ipv6_only_sock(sk))
311 #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \
312 inet6_sk(sk)->rxopt.bits.rxinfo)
314 static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
316 if (sk->sk_family == AF_INET6)
317 return &sk->sk_v6_rcv_saddr;
321 static inline int inet_v6_ipv6only(const struct sock *sk)
323 /* ipv6only field is at same position for timewait and other sockets */
324 return ipv6_only_sock(sk);
327 #define __ipv6_only_sock(sk) 0
328 #define ipv6_only_sock(sk) 0
329 #define ipv6_sk_rxinfo(sk) 0
331 static inline bool ipv6_mod_enabled(void)
336 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
341 static inline struct inet6_request_sock *
342 inet6_rsk(const struct request_sock *rsk)
347 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
352 #define inet6_rcv_saddr(__sk) NULL
353 #define tcp_twsk_ipv6only(__sk) 0
354 #define inet_v6_ipv6only(__sk) 0
355 #endif /* IS_ENABLED(CONFIG_IPV6) */