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Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _IPV6_H |
2 | #define _IPV6_H | |
3 | ||
607ca46e | 4 | #include <uapi/linux/ipv6.h> |
1da177e4 | 5 | |
1da177e4 | 6 | #define ipv6_optlen(p) (((p)->hdrlen+1) << 3) |
1da177e4 LT |
7 | /* |
8 | * This structure contains configuration options per IPv6 link. | |
9 | */ | |
10 | struct ipv6_devconf { | |
11 | __s32 forwarding; | |
12 | __s32 hop_limit; | |
13 | __s32 mtu6; | |
14 | __s32 accept_ra; | |
15 | __s32 accept_redirects; | |
16 | __s32 autoconf; | |
17 | __s32 dad_transmits; | |
18 | __s32 rtr_solicits; | |
19 | __s32 rtr_solicit_interval; | |
20 | __s32 rtr_solicit_delay; | |
21 | __s32 force_mld_version; | |
22 | #ifdef CONFIG_IPV6_PRIVACY | |
23 | __s32 use_tempaddr; | |
24 | __s32 temp_valid_lft; | |
25 | __s32 temp_prefered_lft; | |
26 | __s32 regen_max_retry; | |
27 | __s32 max_desync_factor; | |
28 | #endif | |
29 | __s32 max_addresses; | |
65f5c7c1 | 30 | __s32 accept_ra_defrtr; |
c4fd30eb | 31 | __s32 accept_ra_pinfo; |
930d6ff2 YH |
32 | #ifdef CONFIG_IPV6_ROUTER_PREF |
33 | __s32 accept_ra_rtr_pref; | |
52e16356 | 34 | __s32 rtr_probe_interval; |
09c884d4 YH |
35 | #ifdef CONFIG_IPV6_ROUTE_INFO |
36 | __s32 accept_ra_rt_info_max_plen; | |
37 | #endif | |
930d6ff2 | 38 | #endif |
fbea49e1 | 39 | __s32 proxy_ndp; |
0bcbc926 | 40 | __s32 accept_source_route; |
95c385b4 NH |
41 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
42 | __s32 optimistic_dad; | |
7bc570c8 YH |
43 | #endif |
44 | #ifdef CONFIG_IPV6_MROUTE | |
45 | __s32 mc_forwarding; | |
95c385b4 | 46 | #endif |
778d80be | 47 | __s32 disable_ipv6; |
1b34be74 | 48 | __s32 accept_dad; |
f7734fdf | 49 | __s32 force_tllao; |
5cb04436 | 50 | __s32 ndisc_notify; |
1da177e4 LT |
51 | void *sysctl; |
52 | }; | |
56d417b1 BH |
53 | |
54 | struct ipv6_params { | |
55 | __s32 disable_ipv6; | |
56 | __s32 autoconf; | |
57 | }; | |
58 | extern struct ipv6_params ipv6_defaults; | |
1da177e4 | 59 | #include <linux/icmpv6.h> |
1da177e4 LT |
60 | #include <linux/tcp.h> |
61 | #include <linux/udp.h> | |
62 | ||
14c85021 ACM |
63 | #include <net/inet_sock.h> |
64 | ||
0660e03f ACM |
65 | static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) |
66 | { | |
67 | return (struct ipv6hdr *)skb_network_header(skb); | |
68 | } | |
69 | ||
39b89160 ACM |
70 | static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb) |
71 | { | |
9c70220b | 72 | return (struct ipv6hdr *)skb_transport_header(skb); |
39b89160 ACM |
73 | } |
74 | ||
7a3198a8 JB |
75 | static inline __u8 ipv6_tclass(const struct ipv6hdr *iph) |
76 | { | |
77 | return (ntohl(*(__be32 *)iph) >> 20) & 0xff; | |
78 | } | |
79 | ||
1da177e4 LT |
80 | /* |
81 | This structure contains results of exthdrs parsing | |
82 | as offsets from skb->nh. | |
83 | */ | |
84 | ||
85 | struct inet6_skb_parm { | |
86 | int iif; | |
87 | __u16 ra; | |
88 | __u16 hop; | |
89 | __u16 dst0; | |
90 | __u16 srcrt; | |
91 | __u16 dst1; | |
333fad53 | 92 | __u16 lastopt; |
e7c38157 | 93 | __u16 nhoff; |
3e3850e9 | 94 | __u16 flags; |
59fbb3a6 | 95 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
8dd7368d DM |
96 | __u16 dsthao; |
97 | #endif | |
4cdd3408 | 98 | __u16 frag_max_size; |
3e3850e9 PM |
99 | |
100 | #define IP6SKB_XFRM_TRANSFORMED 1 | |
7bc570c8 | 101 | #define IP6SKB_FORWARDED 2 |
9c6eb28a | 102 | #define IP6SKB_REROUTED 4 |
1da177e4 LT |
103 | }; |
104 | ||
105 | #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) | |
4b340ae2 | 106 | #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb)) |
1da177e4 | 107 | |
505cbfc5 ACM |
108 | static inline int inet6_iif(const struct sk_buff *skb) |
109 | { | |
110 | return IP6CB(skb)->iif; | |
111 | } | |
112 | ||
ca304b61 | 113 | struct inet6_request_sock { |
2e6599cb ACM |
114 | struct in6_addr loc_addr; |
115 | struct in6_addr rmt_addr; | |
116 | struct sk_buff *pktopts; | |
117 | int iif; | |
118 | }; | |
119 | ||
ca304b61 ACM |
120 | struct tcp6_request_sock { |
121 | struct tcp_request_sock tcp6rsk_tcp; | |
122 | struct inet6_request_sock tcp6rsk_inet6; | |
123 | }; | |
2e6599cb | 124 | |
20283d84 HX |
125 | struct ipv6_mc_socklist; |
126 | struct ipv6_ac_socklist; | |
127 | struct ipv6_fl_socklist; | |
128 | ||
1da177e4 LT |
129 | /** |
130 | * struct ipv6_pinfo - ipv6 private area | |
131 | * | |
132 | * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc) | |
133 | * this _must_ be the last member, so that inet6_sk_generic | |
134 | * is able to calculate its offset from the base struct sock | |
135 | * by using the struct proto->slab_obj_size member. -acme | |
136 | */ | |
137 | struct ipv6_pinfo { | |
138 | struct in6_addr saddr; | |
139 | struct in6_addr rcv_saddr; | |
140 | struct in6_addr daddr; | |
b24a2516 | 141 | struct in6_pktinfo sticky_pktinfo; |
d3818c92 | 142 | const struct in6_addr *daddr_cache; |
8e1ef0a9 | 143 | #ifdef CONFIG_IPV6_SUBTREES |
d3818c92 | 144 | const struct in6_addr *saddr_cache; |
8e1ef0a9 | 145 | #endif |
1da177e4 | 146 | |
90bcaf7b | 147 | __be32 flow_label; |
1da177e4 | 148 | __u32 frag_size; |
1d5d236d YH |
149 | |
150 | /* | |
151 | * Packed in 16bits. | |
152 | * Omit one shift by by putting the signed field at MSB. | |
153 | */ | |
154 | #if defined(__BIG_ENDIAN_BITFIELD) | |
155 | __s16 hop_limit:9; | |
156 | __u16 __unused_1:7; | |
157 | #else | |
158 | __u16 __unused_1:7; | |
159 | __s16 hop_limit:9; | |
160 | #endif | |
161 | ||
162 | #if defined(__BIG_ENDIAN_BITFIELD) | |
163 | /* Packed in 16bits. */ | |
164 | __s16 mcast_hops:9; | |
165 | __u16 __unused_2:6, | |
166 | mc_loop:1; | |
167 | #else | |
168 | __u16 mc_loop:1, | |
169 | __unused_2:6; | |
170 | __s16 mcast_hops:9; | |
171 | #endif | |
c4062dfc | 172 | int ucast_oif; |
1da177e4 LT |
173 | int mcast_oif; |
174 | ||
175 | /* pktoption flags */ | |
176 | union { | |
177 | struct { | |
4c752098 YH |
178 | __u16 srcrt:1, |
179 | osrcrt:1, | |
1da177e4 | 180 | rxinfo:1, |
333fad53 | 181 | rxoinfo:1, |
1da177e4 | 182 | rxhlim:1, |
333fad53 | 183 | rxohlim:1, |
1da177e4 | 184 | hopopts:1, |
333fad53 | 185 | ohopopts:1, |
1da177e4 | 186 | dstopts:1, |
333fad53 | 187 | odstopts:1, |
41a1f8ea | 188 | rxflow:1, |
793b1473 | 189 | rxtclass:1, |
6c468622 BS |
190 | rxpmtu:1, |
191 | rxorigdstaddr:1; | |
192 | /* 2 bits hole */ | |
1da177e4 | 193 | } bits; |
333fad53 | 194 | __u16 all; |
1da177e4 LT |
195 | } rxopt; |
196 | ||
197 | /* sockopt flags */ | |
793b1473 | 198 | __u16 recverr:1, |
1da177e4 LT |
199 | sndflow:1, |
200 | pmtudisc:2, | |
7cbca67c | 201 | ipv6only:1, |
793b1473 | 202 | srcprefs:3, /* 001: prefer temporary address |
7cbca67c YH |
203 | * 010: prefer public address |
204 | * 100: prefer care-of address | |
205 | */ | |
793b1473 | 206 | dontfrag:1; |
e802af9c | 207 | __u8 min_hopcount; |
41a1f8ea | 208 | __u8 tclass; |
4c507d28 | 209 | __u8 rcv_tclass; |
1da177e4 LT |
210 | |
211 | __u32 dst_cookie; | |
5d299f3d | 212 | __u32 rx_dst_cookie; |
1da177e4 | 213 | |
456b61bc | 214 | struct ipv6_mc_socklist __rcu *ipv6_mc_list; |
1da177e4 LT |
215 | struct ipv6_ac_socklist *ipv6_ac_list; |
216 | struct ipv6_fl_socklist *ipv6_fl_list; | |
217 | ||
218 | struct ipv6_txoptions *opt; | |
219 | struct sk_buff *pktoptions; | |
4b340ae2 | 220 | struct sk_buff *rxpmtu; |
1da177e4 LT |
221 | struct { |
222 | struct ipv6_txoptions *opt; | |
47254745 YH |
223 | u8 hop_limit; |
224 | u8 tclass; | |
1da177e4 LT |
225 | } cork; |
226 | }; | |
227 | ||
228 | /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ | |
229 | struct raw6_sock { | |
230 | /* inet_sock has to be the first member of raw6_sock */ | |
231 | struct inet_sock inet; | |
232 | __u32 checksum; /* perform checksum */ | |
233 | __u32 offset; /* checksum offset */ | |
234 | struct icmp6_filter filter; | |
d1db275d | 235 | __u32 ip6mr_table; |
1da177e4 LT |
236 | /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */ |
237 | struct ipv6_pinfo inet6; | |
238 | }; | |
239 | ||
240 | struct udp6_sock { | |
241 | struct udp_sock udp; | |
242 | /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */ | |
243 | struct ipv6_pinfo inet6; | |
244 | }; | |
245 | ||
246 | struct tcp6_sock { | |
247 | struct tcp_sock tcp; | |
248 | /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */ | |
249 | struct ipv6_pinfo inet6; | |
250 | }; | |
251 | ||
b9750ce1 ACM |
252 | extern int inet6_sk_rebuild_header(struct sock *sk); |
253 | ||
48ee3569 DM |
254 | struct inet6_timewait_sock { |
255 | struct in6_addr tw_v6_daddr; | |
256 | struct in6_addr tw_v6_rcv_saddr; | |
257 | }; | |
258 | ||
259 | struct tcp6_timewait_sock { | |
260 | struct tcp_timewait_sock tcp6tw_tcp; | |
261 | struct inet6_timewait_sock tcp6tw_inet6; | |
262 | }; | |
263 | ||
264 | static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk) | |
265 | { | |
266 | return (struct inet6_timewait_sock *)(((u8 *)sk) + | |
267 | inet_twsk(sk)->tw_ipv6_offset); | |
268 | } | |
269 | ||
dfd56b8b | 270 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
271 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) |
272 | { | |
273 | return inet_sk(__sk)->pinet6; | |
274 | } | |
275 | ||
ca304b61 ACM |
276 | static inline struct inet6_request_sock * |
277 | inet6_rsk(const struct request_sock *rsk) | |
278 | { | |
279 | return (struct inet6_request_sock *)(((u8 *)rsk) + | |
280 | inet_rsk(rsk)->inet6_rsk_offset); | |
281 | } | |
282 | ||
283 | static inline u32 inet6_rsk_offset(struct request_sock *rsk) | |
284 | { | |
285 | return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock); | |
286 | } | |
287 | ||
288 | static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops) | |
289 | { | |
290 | struct request_sock *req = reqsk_alloc(ops); | |
291 | ||
ce4a7d0d | 292 | if (req != NULL) { |
ca304b61 | 293 | inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req); |
ce4a7d0d ACM |
294 | inet6_rsk(req)->pktopts = NULL; |
295 | } | |
ca304b61 ACM |
296 | |
297 | return req; | |
298 | } | |
299 | ||
1da177e4 LT |
300 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
301 | { | |
302 | return (struct raw6_sock *)sk; | |
303 | } | |
304 | ||
305 | static inline void inet_sk_copy_descendant(struct sock *sk_to, | |
306 | const struct sock *sk_from) | |
307 | { | |
308 | int ancestor_size = sizeof(struct inet_sock); | |
309 | ||
310 | if (sk_from->sk_family == PF_INET6) | |
311 | ancestor_size += sizeof(struct ipv6_pinfo); | |
312 | ||
313 | __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size); | |
314 | } | |
315 | ||
316 | #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only) | |
317 | #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk)) | |
8feaf0c0 | 318 | |
0fa1a53e ACM |
319 | static inline u16 inet6_tw_offset(const struct proto *prot) |
320 | { | |
6d6ee43e ACM |
321 | return prot->twsk_prot->twsk_obj_size - |
322 | sizeof(struct inet6_timewait_sock); | |
0fa1a53e ACM |
323 | } |
324 | ||
0fa1a53e | 325 | static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk) |
8feaf0c0 ACM |
326 | { |
327 | return likely(sk->sk_state != TCP_TIME_WAIT) ? | |
0fa1a53e | 328 | &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr; |
8feaf0c0 ACM |
329 | } |
330 | ||
0fa1a53e | 331 | static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk) |
8feaf0c0 | 332 | { |
0fa1a53e | 333 | return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL; |
8feaf0c0 ACM |
334 | } |
335 | ||
463c84b9 | 336 | static inline int inet_v6_ipv6only(const struct sock *sk) |
8feaf0c0 ACM |
337 | { |
338 | return likely(sk->sk_state != TCP_TIME_WAIT) ? | |
3f421baa | 339 | ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only; |
8feaf0c0 | 340 | } |
1da177e4 LT |
341 | #else |
342 | #define __ipv6_only_sock(sk) 0 | |
343 | #define ipv6_only_sock(sk) 0 | |
344 | ||
345 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) | |
346 | { | |
347 | return NULL; | |
348 | } | |
349 | ||
ca304b61 ACM |
350 | static inline struct inet6_request_sock * |
351 | inet6_rsk(const struct request_sock *rsk) | |
352 | { | |
353 | return NULL; | |
354 | } | |
355 | ||
1da177e4 LT |
356 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
357 | { | |
358 | return NULL; | |
359 | } | |
360 | ||
0fa1a53e ACM |
361 | #define __inet6_rcv_saddr(__sk) NULL |
362 | #define inet6_rcv_saddr(__sk) NULL | |
8feaf0c0 | 363 | #define tcp_twsk_ipv6only(__sk) 0 |
463c84b9 | 364 | #define inet_v6_ipv6only(__sk) 0 |
dfd56b8b | 365 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
1da177e4 | 366 | |
ce43b03e ED |
367 | #define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \ |
368 | ((inet_sk(__sk)->inet_portpair == (__ports)) && \ | |
369 | ((__sk)->sk_family == AF_INET6) && \ | |
370 | ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \ | |
371 | ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \ | |
372 | (!(__sk)->sk_bound_dev_if || \ | |
373 | ((__sk)->sk_bound_dev_if == (__dif))) && \ | |
374 | net_eq(sock_net(__sk), (__net))) | |
375 | ||
376 | #define INET6_TW_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \ | |
377 | ((inet_twsk(__sk)->tw_portpair == (__ports)) && \ | |
378 | ((__sk)->sk_family == AF_INET6) && \ | |
379 | ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr)) && \ | |
380 | ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr)) && \ | |
381 | (!(__sk)->sk_bound_dev_if || \ | |
382 | ((__sk)->sk_bound_dev_if == (__dif))) && \ | |
383 | net_eq(sock_net(__sk), (__net))) | |
535174ef | 384 | |
8feaf0c0 | 385 | #endif /* _IPV6_H */ |