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
54 atomic_t mc_forwarding;
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)
137 #define IP6SKB_XFRM_TRANSFORMED 1
138 #define IP6SKB_FORWARDED 2
139 #define IP6SKB_REROUTED 4
140 #define IP6SKB_ROUTERALERT 8
141 #define IP6SKB_FRAGMENTED 16
142 #define IP6SKB_HOPBYHOP 32
143 #define IP6SKB_L3SLAVE 64
144 #define IP6SKB_JUMBOGRAM 128
145 #define IP6SKB_SEG6 256
148 #if defined(CONFIG_NET_L3_MASTER_DEV)
149 static inline bool ipv6_l3mdev_skb(__u16 flags)
151 return flags & IP6SKB_L3SLAVE;
154 static inline bool ipv6_l3mdev_skb(__u16 flags)
160 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
161 #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
163 static inline int inet6_iif(const struct sk_buff *skb)
165 bool l3_slave = ipv6_l3mdev_skb(IP6CB(skb)->flags);
167 return l3_slave ? skb->skb_iif : IP6CB(skb)->iif;
170 static inline bool inet6_is_jumbogram(const struct sk_buff *skb)
172 return !!(IP6CB(skb)->flags & IP6SKB_JUMBOGRAM);
175 /* can not be used in TCP layer after tcp_v6_fill_cb */
176 static inline int inet6_sdif(const struct sk_buff *skb)
178 #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV)
179 if (skb && ipv6_l3mdev_skb(IP6CB(skb)->flags))
180 return IP6CB(skb)->iif;
185 struct tcp6_request_sock {
186 struct tcp_request_sock tcp6rsk_tcp;
189 struct ipv6_mc_socklist;
190 struct ipv6_ac_socklist;
191 struct ipv6_fl_socklist;
194 struct ipv6_txoptions *opt;
200 * struct ipv6_pinfo - ipv6 private area
202 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
203 * this _must_ be the last member, so that inet6_sk_generic
204 * is able to calculate its offset from the base struct sock
205 * by using the struct proto->slab_obj_size member. -acme
208 struct in6_addr saddr;
209 struct in6_pktinfo sticky_pktinfo;
210 const struct in6_addr *daddr_cache;
211 #ifdef CONFIG_IPV6_SUBTREES
212 const struct in6_addr *saddr_cache;
220 * Omit one shift by putting the signed field at MSB.
222 #if defined(__BIG_ENDIAN_BITFIELD)
230 #if defined(__BIG_ENDIAN_BITFIELD)
231 /* Packed in 16bits. */
243 /* pktoption flags */
271 padding:1, /* 1 bit hole */
272 srcprefs:3, /* 001: prefer temporary address
273 * 010: prefer public address
274 * 100: prefer care-of address
288 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
289 struct ipv6_ac_socklist *ipv6_ac_list;
290 struct ipv6_fl_socklist __rcu *ipv6_fl_list;
292 struct ipv6_txoptions __rcu *opt;
293 struct sk_buff *pktoptions;
294 struct sk_buff *rxpmtu;
295 struct inet6_cork cork;
298 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
300 /* inet_sock has to be the first member of raw6_sock */
301 struct inet_sock inet;
302 __u32 checksum; /* perform checksum */
303 __u32 offset; /* checksum offset */
304 struct icmp6_filter filter;
306 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
307 struct ipv6_pinfo inet6;
312 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
313 struct ipv6_pinfo inet6;
318 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
319 struct ipv6_pinfo inet6;
322 extern int inet6_sk_rebuild_header(struct sock *sk);
324 struct tcp6_timewait_sock {
325 struct tcp_timewait_sock tcp6tw_tcp;
328 #if IS_ENABLED(CONFIG_IPV6)
329 bool ipv6_mod_enabled(void);
331 static inline struct ipv6_pinfo *inet6_sk(const struct sock *__sk)
333 return sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL;
336 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
338 return (struct raw6_sock *)sk;
341 #define __ipv6_only_sock(sk) (sk->sk_ipv6only)
342 #define ipv6_only_sock(sk) (__ipv6_only_sock(sk))
343 #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \
344 inet6_sk(sk)->rxopt.bits.rxinfo)
346 static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
348 if (sk->sk_family == AF_INET6)
349 return &sk->sk_v6_rcv_saddr;
353 static inline int inet_v6_ipv6only(const struct sock *sk)
355 /* ipv6only field is at same position for timewait and other sockets */
356 return ipv6_only_sock(sk);
359 #define __ipv6_only_sock(sk) 0
360 #define ipv6_only_sock(sk) 0
361 #define ipv6_sk_rxinfo(sk) 0
363 static inline bool ipv6_mod_enabled(void)
368 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
373 static inline struct inet6_request_sock *
374 inet6_rsk(const struct request_sock *rsk)
379 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
384 #define inet6_rcv_saddr(__sk) NULL
385 #define tcp_twsk_ipv6only(__sk) 0
386 #define inet_v6_ipv6only(__sk) 0
387 #endif /* IS_ENABLED(CONFIG_IPV6) */