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_min_lft;
37 __s32 accept_ra_pinfo;
38 __s32 ignore_routes_with_linkdown;
39 #ifdef CONFIG_IPV6_ROUTER_PREF
40 __s32 accept_ra_rtr_pref;
41 __s32 rtr_probe_interval;
42 #ifdef CONFIG_IPV6_ROUTE_INFO
43 __s32 accept_ra_rt_info_min_plen;
44 __s32 accept_ra_rt_info_max_plen;
48 __s32 accept_source_route;
49 __s32 accept_ra_from_local;
50 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
54 #ifdef CONFIG_IPV6_MROUTE
55 atomic_t mc_forwarding;
58 __s32 drop_unicast_in_l2_multicast;
62 __s32 suppress_frag_ndisc;
64 __s32 drop_unsolicited_na;
65 __s32 accept_untracked_na;
66 struct ipv6_stable_secret {
68 struct in6_addr secret;
70 __s32 use_oif_addrs_only;
71 __s32 keep_addr_on_down;
73 #ifdef CONFIG_IPV6_SEG6_HMAC
74 __s32 seg6_require_hmac;
80 __s32 rpl_seg_enabled;
84 __u8 ndisc_evict_nocarrier;
85 __u8 ra_honor_pio_life;
87 struct ctl_table_header *sysctl_header;
94 extern struct ipv6_params ipv6_defaults;
95 #include <linux/tcp.h>
96 #include <linux/udp.h>
98 #include <net/inet_sock.h>
100 static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
102 return (struct ipv6hdr *)skb_network_header(skb);
105 static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb)
107 return (struct ipv6hdr *)skb_inner_network_header(skb);
110 static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
112 return (struct ipv6hdr *)skb_transport_header(skb);
115 static inline unsigned int ipv6_transport_len(const struct sk_buff *skb)
117 return ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr) -
118 skb_network_header_len(skb);
122 This structure contains results of exthdrs parsing
123 as offsets from skb->nh.
126 struct inet6_skb_parm {
135 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
141 #define IP6SKB_XFRM_TRANSFORMED 1
142 #define IP6SKB_FORWARDED 2
143 #define IP6SKB_REROUTED 4
144 #define IP6SKB_ROUTERALERT 8
145 #define IP6SKB_FRAGMENTED 16
146 #define IP6SKB_HOPBYHOP 32
147 #define IP6SKB_L3SLAVE 64
148 #define IP6SKB_JUMBOGRAM 128
149 #define IP6SKB_SEG6 256
150 #define IP6SKB_FAKEJUMBO 512
151 #define IP6SKB_MULTIPATH 1024
154 #if defined(CONFIG_NET_L3_MASTER_DEV)
155 static inline bool ipv6_l3mdev_skb(__u16 flags)
157 return flags & IP6SKB_L3SLAVE;
160 static inline bool ipv6_l3mdev_skb(__u16 flags)
166 #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
167 #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
169 static inline int inet6_iif(const struct sk_buff *skb)
171 bool l3_slave = ipv6_l3mdev_skb(IP6CB(skb)->flags);
173 return l3_slave ? skb->skb_iif : IP6CB(skb)->iif;
176 static inline bool inet6_is_jumbogram(const struct sk_buff *skb)
178 return !!(IP6CB(skb)->flags & IP6SKB_JUMBOGRAM);
181 /* can not be used in TCP layer after tcp_v6_fill_cb */
182 static inline int inet6_sdif(const struct sk_buff *skb)
184 #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV)
185 if (skb && ipv6_l3mdev_skb(IP6CB(skb)->flags))
186 return IP6CB(skb)->iif;
191 struct tcp6_request_sock {
192 struct tcp_request_sock tcp6rsk_tcp;
195 struct ipv6_mc_socklist;
196 struct ipv6_ac_socklist;
197 struct ipv6_fl_socklist;
200 struct ipv6_txoptions *opt;
205 /* struct ipv6_pinfo - ipv6 private area */
207 struct in6_addr saddr;
208 struct in6_pktinfo sticky_pktinfo;
209 const struct in6_addr *daddr_cache;
210 #ifdef CONFIG_IPV6_SUBTREES
211 const struct in6_addr *saddr_cache;
223 /* pktoption flags */
247 __u8 srcprefs; /* 001: prefer temporary address
248 * 010: prefer public address
249 * 100: prefer care-of address
258 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
259 struct ipv6_ac_socklist *ipv6_ac_list;
260 struct ipv6_fl_socklist __rcu *ipv6_fl_list;
262 struct ipv6_txoptions __rcu *opt;
263 struct sk_buff *pktoptions;
264 struct sk_buff *rxpmtu;
265 struct inet6_cork cork;
268 /* We currently use available bits from inet_sk(sk)->inet_flags,
269 * this could change in the future.
271 #define inet6_test_bit(nr, sk) \
272 test_bit(INET_FLAGS_##nr, &inet_sk(sk)->inet_flags)
273 #define inet6_set_bit(nr, sk) \
274 set_bit(INET_FLAGS_##nr, &inet_sk(sk)->inet_flags)
275 #define inet6_clear_bit(nr, sk) \
276 clear_bit(INET_FLAGS_##nr, &inet_sk(sk)->inet_flags)
277 #define inet6_assign_bit(nr, sk, val) \
278 assign_bit(INET_FLAGS_##nr, &inet_sk(sk)->inet_flags, val)
280 /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
282 /* inet_sock has to be the first member of raw6_sock */
283 struct inet_sock inet;
284 __u32 checksum; /* perform checksum */
285 __u32 offset; /* checksum offset */
286 struct icmp6_filter filter;
289 struct ipv6_pinfo inet6;
295 struct ipv6_pinfo inet6;
301 struct ipv6_pinfo inet6;
304 extern int inet6_sk_rebuild_header(struct sock *sk);
306 struct tcp6_timewait_sock {
307 struct tcp_timewait_sock tcp6tw_tcp;
310 #if IS_ENABLED(CONFIG_IPV6)
311 bool ipv6_mod_enabled(void);
313 static inline struct ipv6_pinfo *inet6_sk(const struct sock *__sk)
315 return sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL;
318 #define raw6_sk(ptr) container_of_const(ptr, struct raw6_sock, inet.sk)
320 #define ipv6_only_sock(sk) (sk->sk_ipv6only)
321 #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \
322 inet6_sk(sk)->rxopt.bits.rxinfo)
324 static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
326 if (sk->sk_family == AF_INET6)
327 return &sk->sk_v6_rcv_saddr;
331 static inline int inet_v6_ipv6only(const struct sock *sk)
333 /* ipv6only field is at same position for timewait and other sockets */
334 return ipv6_only_sock(sk);
337 #define ipv6_only_sock(sk) 0
338 #define ipv6_sk_rxinfo(sk) 0
340 static inline bool ipv6_mod_enabled(void)
345 static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
350 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
355 #define inet6_rcv_saddr(__sk) NULL
356 #define inet_v6_ipv6only(__sk) 0
357 #endif /* IS_ENABLED(CONFIG_IPV6) */