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_max_plen;
44 __s32 accept_source_route;
45 __s32 accept_ra_from_local;
46 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
50 #ifdef CONFIG_IPV6_MROUTE
54 __s32 drop_unicast_in_l2_multicast;
58 __s32 suppress_frag_ndisc;
60 __s32 drop_unsolicited_na;
61 struct ipv6_stable_secret {
63 struct in6_addr secret;
65 __s32 use_oif_addrs_only;
66 __s32 keep_addr_on_down;
68 struct ctl_table_header *sysctl_header;
75 extern struct ipv6_params ipv6_defaults;
76 #include <linux/icmpv6.h>
77 #include <linux/tcp.h>
78 #include <linux/udp.h>
80 #include <net/inet_sock.h>
82 static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
84 return (struct ipv6hdr *)skb_network_header(skb);
87 static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb)
89 return (struct ipv6hdr *)skb_inner_network_header(skb);
92 static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
94 return (struct ipv6hdr *)skb_transport_header(skb);
98 This structure contains results of exthdrs parsing
99 as offsets from skb->nh.
102 struct inet6_skb_parm {
111 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
116 #define IP6SKB_XFRM_TRANSFORMED 1
117 #define IP6SKB_FORWARDED 2
118 #define IP6SKB_REROUTED 4
119 #define IP6SKB_ROUTERALERT 8
120 #define IP6SKB_FRAGMENTED 16
121 #define IP6SKB_HOPBYHOP 32
122 #define IP6SKB_L3SLAVE 64
125 #if defined(CONFIG_NET_L3_MASTER_DEV)
126 static inline bool ipv6_l3mdev_skb(__u16 flags)
128 return flags & IP6SKB_L3SLAVE;
131 static inline bool ipv6_l3mdev_skb(__u16 flags)
137 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
138 #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
140 static inline int inet6_iif(const struct sk_buff *skb)
142 bool l3_slave = ipv6_l3mdev_skb(IP6CB(skb)->flags);
144 return l3_slave ? skb->skb_iif : IP6CB(skb)->iif;
147 /* can not be used in TCP layer after tcp_v6_fill_cb */
148 static inline bool inet6_exact_dif_match(struct net *net, struct sk_buff *skb)
150 #if defined(CONFIG_NET_L3_MASTER_DEV)
151 if (!net->ipv4.sysctl_tcp_l3mdev_accept &&
152 skb && ipv6_l3mdev_skb(IP6CB(skb)->flags))
158 struct tcp6_request_sock {
159 struct tcp_request_sock tcp6rsk_tcp;
162 struct ipv6_mc_socklist;
163 struct ipv6_ac_socklist;
164 struct ipv6_fl_socklist;
167 struct ipv6_txoptions *opt;
173 * struct ipv6_pinfo - ipv6 private area
175 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
176 * this _must_ be the last member, so that inet6_sk_generic
177 * is able to calculate its offset from the base struct sock
178 * by using the struct proto->slab_obj_size member. -acme
181 struct in6_addr saddr;
182 struct in6_pktinfo sticky_pktinfo;
183 const struct in6_addr *daddr_cache;
184 #ifdef CONFIG_IPV6_SUBTREES
185 const struct in6_addr *saddr_cache;
193 * Omit one shift by by putting the signed field at MSB.
195 #if defined(__BIG_ENDIAN_BITFIELD)
203 #if defined(__BIG_ENDIAN_BITFIELD)
204 /* Packed in 16bits. */
216 /* pktoption flags */
243 padding:1, /* 1 bit hole */
244 srcprefs:3, /* 001: prefer temporary address
245 * 010: prefer public address
246 * 100: prefer care-of address
257 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
258 struct ipv6_ac_socklist *ipv6_ac_list;
259 struct ipv6_fl_socklist __rcu *ipv6_fl_list;
261 struct ipv6_txoptions __rcu *opt;
262 struct sk_buff *pktoptions;
263 struct sk_buff *rxpmtu;
264 struct inet6_cork cork;
267 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
269 /* inet_sock has to be the first member of raw6_sock */
270 struct inet_sock inet;
271 __u32 checksum; /* perform checksum */
272 __u32 offset; /* checksum offset */
273 struct icmp6_filter filter;
275 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
276 struct ipv6_pinfo inet6;
281 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
282 struct ipv6_pinfo inet6;
287 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
288 struct ipv6_pinfo inet6;
291 extern int inet6_sk_rebuild_header(struct sock *sk);
293 struct tcp6_timewait_sock {
294 struct tcp_timewait_sock tcp6tw_tcp;
297 #if IS_ENABLED(CONFIG_IPV6)
298 bool ipv6_mod_enabled(void);
300 static inline struct ipv6_pinfo *inet6_sk(const struct sock *__sk)
302 return sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL;
305 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
307 return (struct raw6_sock *)sk;
310 static inline void inet_sk_copy_descendant(struct sock *sk_to,
311 const struct sock *sk_from)
313 int ancestor_size = sizeof(struct inet_sock);
315 if (sk_from->sk_family == PF_INET6)
316 ancestor_size += sizeof(struct ipv6_pinfo);
318 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
321 #define __ipv6_only_sock(sk) (sk->sk_ipv6only)
322 #define ipv6_only_sock(sk) (__ipv6_only_sock(sk))
323 #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \
324 inet6_sk(sk)->rxopt.bits.rxinfo)
326 static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
328 if (sk->sk_family == AF_INET6)
329 return &sk->sk_v6_rcv_saddr;
333 static inline int inet_v6_ipv6only(const struct sock *sk)
335 /* ipv6only field is at same position for timewait and other sockets */
336 return ipv6_only_sock(sk);
339 #define __ipv6_only_sock(sk) 0
340 #define ipv6_only_sock(sk) 0
341 #define ipv6_sk_rxinfo(sk) 0
343 static inline bool ipv6_mod_enabled(void)
348 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
353 static inline struct inet6_request_sock *
354 inet6_rsk(const struct request_sock *rsk)
359 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
364 #define inet6_rcv_saddr(__sk) NULL
365 #define tcp_twsk_ipv6only(__sk) 0
366 #define inet_v6_ipv6only(__sk) 0
367 #endif /* IS_ENABLED(CONFIG_IPV6) */