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1 | #ifndef _IPV6_H |
2 | #define _IPV6_H |
3 | |
4 | #include <uapi/linux/ipv6.h> |
5 | |
6 | #define ipv6_optlen(p) (((p)->hdrlen+1) << 3) |
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 | __s32 mldv1_unsolicited_report_interval; |
23 | __s32 mldv2_unsolicited_report_interval; |
24 | #ifdef CONFIG_IPV6_PRIVACY |
25 | __s32 use_tempaddr; |
26 | __s32 temp_valid_lft; |
27 | __s32 temp_prefered_lft; |
28 | __s32 regen_max_retry; |
29 | __s32 max_desync_factor; |
30 | #endif |
31 | __s32 max_addresses; |
32 | __s32 accept_ra_defrtr; |
33 | __s32 accept_ra_pinfo; |
34 | #ifdef CONFIG_IPV6_ROUTER_PREF |
35 | __s32 accept_ra_rtr_pref; |
36 | __s32 rtr_probe_interval; |
37 | #ifdef CONFIG_IPV6_ROUTE_INFO |
38 | __s32 accept_ra_rt_info_max_plen; |
39 | #endif |
40 | #endif |
41 | __s32 proxy_ndp; |
42 | __s32 accept_source_route; |
43 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
44 | __s32 optimistic_dad; |
45 | #endif |
46 | #ifdef CONFIG_IPV6_MROUTE |
47 | __s32 mc_forwarding; |
48 | #endif |
49 | __s32 disable_ipv6; |
50 | __s32 accept_dad; |
51 | __s32 force_tllao; |
52 | __s32 ndisc_notify; |
53 | __s32 suppress_frag_ndisc; |
54 | void *sysctl; |
55 | }; |
56 | |
57 | struct ipv6_params { |
58 | __s32 disable_ipv6; |
59 | __s32 autoconf; |
60 | }; |
61 | extern struct ipv6_params ipv6_defaults; |
62 | #include <linux/icmpv6.h> |
63 | #include <linux/tcp.h> |
64 | #include <linux/udp.h> |
65 | |
66 | #include <net/inet_sock.h> |
67 | |
68 | static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) |
69 | { |
70 | return (struct ipv6hdr *)skb_network_header(skb); |
71 | } |
72 | |
73 | static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb) |
74 | { |
75 | return (struct ipv6hdr *)skb_inner_network_header(skb); |
76 | } |
77 | |
78 | static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb) |
79 | { |
80 | return (struct ipv6hdr *)skb_transport_header(skb); |
81 | } |
82 | |
83 | /* |
84 | This structure contains results of exthdrs parsing |
85 | as offsets from skb->nh. |
86 | */ |
87 | |
88 | struct inet6_skb_parm { |
89 | int iif; |
90 | __be16 ra; |
91 | __u16 hop; |
92 | __u16 dst0; |
93 | __u16 srcrt; |
94 | __u16 dst1; |
95 | __u16 lastopt; |
96 | __u16 nhoff; |
97 | __u16 flags; |
98 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
99 | __u16 dsthao; |
100 | #endif |
101 | __u16 frag_max_size; |
102 | |
103 | #define IP6SKB_XFRM_TRANSFORMED 1 |
104 | #define IP6SKB_FORWARDED 2 |
105 | #define IP6SKB_REROUTED 4 |
106 | #define IP6SKB_ROUTERALERT 8 |
107 | #define IP6SKB_FRAGMENTED 16 |
108 | }; |
109 | |
110 | #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) |
111 | #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb)) |
112 | |
113 | static inline int inet6_iif(const struct sk_buff *skb) |
114 | { |
115 | return IP6CB(skb)->iif; |
116 | } |
117 | |
118 | struct inet6_request_sock { |
119 | struct in6_addr loc_addr; |
120 | struct in6_addr rmt_addr; |
121 | struct sk_buff *pktopts; |
122 | int iif; |
123 | }; |
124 | |
125 | struct tcp6_request_sock { |
126 | struct tcp_request_sock tcp6rsk_tcp; |
127 | struct inet6_request_sock tcp6rsk_inet6; |
128 | }; |
129 | |
130 | struct ipv6_mc_socklist; |
131 | struct ipv6_ac_socklist; |
132 | struct ipv6_fl_socklist; |
133 | |
134 | /** |
135 | * struct ipv6_pinfo - ipv6 private area |
136 | * |
137 | * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc) |
138 | * this _must_ be the last member, so that inet6_sk_generic |
139 | * is able to calculate its offset from the base struct sock |
140 | * by using the struct proto->slab_obj_size member. -acme |
141 | */ |
142 | struct ipv6_pinfo { |
143 | struct in6_addr saddr; |
144 | struct in6_addr rcv_saddr; |
145 | struct in6_addr daddr; |
146 | struct in6_pktinfo sticky_pktinfo; |
147 | const struct in6_addr *daddr_cache; |
148 | #ifdef CONFIG_IPV6_SUBTREES |
149 | const struct in6_addr *saddr_cache; |
150 | #endif |
151 | |
152 | __be32 flow_label; |
153 | __u32 frag_size; |
154 | |
155 | /* |
156 | * Packed in 16bits. |
157 | * Omit one shift by by putting the signed field at MSB. |
158 | */ |
159 | #if defined(__BIG_ENDIAN_BITFIELD) |
160 | __s16 hop_limit:9; |
161 | __u16 __unused_1:7; |
162 | #else |
163 | __u16 __unused_1:7; |
164 | __s16 hop_limit:9; |
165 | #endif |
166 | |
167 | #if defined(__BIG_ENDIAN_BITFIELD) |
168 | /* Packed in 16bits. */ |
169 | __s16 mcast_hops:9; |
170 | __u16 __unused_2:6, |
171 | mc_loop:1; |
172 | #else |
173 | __u16 mc_loop:1, |
174 | __unused_2:6; |
175 | __s16 mcast_hops:9; |
176 | #endif |
177 | int ucast_oif; |
178 | int mcast_oif; |
179 | |
180 | /* pktoption flags */ |
181 | union { |
182 | struct { |
183 | __u16 srcrt:1, |
184 | osrcrt:1, |
185 | rxinfo:1, |
186 | rxoinfo:1, |
187 | rxhlim:1, |
188 | rxohlim:1, |
189 | hopopts:1, |
190 | ohopopts:1, |
191 | dstopts:1, |
192 | odstopts:1, |
193 | rxflow:1, |
194 | rxtclass:1, |
195 | rxpmtu:1, |
196 | rxorigdstaddr:1; |
197 | /* 2 bits hole */ |
198 | } bits; |
199 | __u16 all; |
200 | } rxopt; |
201 | |
202 | /* sockopt flags */ |
203 | __u16 recverr:1, |
204 | sndflow:1, |
205 | pmtudisc:2, |
206 | ipv6only:1, |
207 | srcprefs:3, /* 001: prefer temporary address |
208 | * 010: prefer public address |
209 | * 100: prefer care-of address |
210 | */ |
211 | dontfrag:1; |
212 | __u8 min_hopcount; |
213 | __u8 tclass; |
214 | __u8 rcv_tclass; |
215 | |
216 | __u32 dst_cookie; |
217 | __u32 rx_dst_cookie; |
218 | |
219 | struct ipv6_mc_socklist __rcu *ipv6_mc_list; |
220 | struct ipv6_ac_socklist *ipv6_ac_list; |
221 | struct ipv6_fl_socklist __rcu *ipv6_fl_list; |
222 | |
223 | struct ipv6_txoptions *opt; |
224 | struct sk_buff *pktoptions; |
225 | struct sk_buff *rxpmtu; |
226 | struct { |
227 | struct ipv6_txoptions *opt; |
228 | u8 hop_limit; |
229 | u8 tclass; |
230 | } cork; |
231 | }; |
232 | |
233 | /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ |
234 | struct raw6_sock { |
235 | /* inet_sock has to be the first member of raw6_sock */ |
236 | struct inet_sock inet; |
237 | __u32 checksum; /* perform checksum */ |
238 | __u32 offset; /* checksum offset */ |
239 | struct icmp6_filter filter; |
240 | __u32 ip6mr_table; |
241 | /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */ |
242 | struct ipv6_pinfo inet6; |
243 | }; |
244 | |
245 | struct udp6_sock { |
246 | struct udp_sock udp; |
247 | /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */ |
248 | struct ipv6_pinfo inet6; |
249 | }; |
250 | |
251 | struct tcp6_sock { |
252 | struct tcp_sock tcp; |
253 | /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */ |
254 | struct ipv6_pinfo inet6; |
255 | }; |
256 | |
257 | extern int inet6_sk_rebuild_header(struct sock *sk); |
258 | |
259 | struct inet6_timewait_sock { |
260 | struct in6_addr tw_v6_daddr; |
261 | struct in6_addr tw_v6_rcv_saddr; |
262 | }; |
263 | |
264 | struct tcp6_timewait_sock { |
265 | struct tcp_timewait_sock tcp6tw_tcp; |
266 | struct inet6_timewait_sock tcp6tw_inet6; |
267 | }; |
268 | |
269 | static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk) |
270 | { |
271 | return (struct inet6_timewait_sock *)(((u8 *)sk) + |
272 | inet_twsk(sk)->tw_ipv6_offset); |
273 | } |
274 | |
275 | #if IS_ENABLED(CONFIG_IPV6) |
276 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) |
277 | { |
278 | return inet_sk(__sk)->pinet6; |
279 | } |
280 | |
281 | static inline struct inet6_request_sock * |
282 | inet6_rsk(const struct request_sock *rsk) |
283 | { |
284 | return (struct inet6_request_sock *)(((u8 *)rsk) + |
285 | inet_rsk(rsk)->inet6_rsk_offset); |
286 | } |
287 | |
288 | static inline u32 inet6_rsk_offset(struct request_sock *rsk) |
289 | { |
290 | return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock); |
291 | } |
292 | |
293 | static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops) |
294 | { |
295 | struct request_sock *req = reqsk_alloc(ops); |
296 | |
297 | if (req != NULL) { |
298 | inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req); |
299 | inet6_rsk(req)->pktopts = NULL; |
300 | } |
301 | |
302 | return req; |
303 | } |
304 | |
305 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
306 | { |
307 | return (struct raw6_sock *)sk; |
308 | } |
309 | |
310 | static inline void inet_sk_copy_descendant(struct sock *sk_to, |
311 | const struct sock *sk_from) |
312 | { |
313 | int ancestor_size = sizeof(struct inet_sock); |
314 | |
315 | if (sk_from->sk_family == PF_INET6) |
316 | ancestor_size += sizeof(struct ipv6_pinfo); |
317 | |
318 | __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size); |
319 | } |
320 | |
321 | #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only) |
322 | #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk)) |
323 | |
324 | static inline u16 inet6_tw_offset(const struct proto *prot) |
325 | { |
326 | return prot->twsk_prot->twsk_obj_size - |
327 | sizeof(struct inet6_timewait_sock); |
328 | } |
329 | |
330 | static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk) |
331 | { |
332 | return likely(sk->sk_state != TCP_TIME_WAIT) ? |
333 | &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr; |
334 | } |
335 | |
336 | static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk) |
337 | { |
338 | return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL; |
339 | } |
340 | |
341 | static inline int inet_v6_ipv6only(const struct sock *sk) |
342 | { |
343 | return likely(sk->sk_state != TCP_TIME_WAIT) ? |
344 | ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only; |
345 | } |
346 | #else |
347 | #define __ipv6_only_sock(sk) 0 |
348 | #define ipv6_only_sock(sk) 0 |
349 | |
350 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) |
351 | { |
352 | return NULL; |
353 | } |
354 | |
355 | static inline struct inet6_request_sock * |
356 | inet6_rsk(const struct request_sock *rsk) |
357 | { |
358 | return NULL; |
359 | } |
360 | |
361 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
362 | { |
363 | return NULL; |
364 | } |
365 | |
366 | #define __inet6_rcv_saddr(__sk) NULL |
367 | #define inet6_rcv_saddr(__sk) NULL |
368 | #define tcp_twsk_ipv6only(__sk) 0 |
369 | #define inet_v6_ipv6only(__sk) 0 |
370 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
371 | |
372 | #define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \ |
373 | ((inet_sk(__sk)->inet_portpair == (__ports)) && \ |
374 | ((__sk)->sk_family == AF_INET6) && \ |
375 | ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \ |
376 | ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \ |
377 | (!(__sk)->sk_bound_dev_if || \ |
378 | ((__sk)->sk_bound_dev_if == (__dif))) && \ |
379 | net_eq(sock_net(__sk), (__net))) |
380 | |
381 | #define INET6_TW_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \ |
382 | ((inet_twsk(__sk)->tw_portpair == (__ports)) && \ |
383 | ((__sk)->sk_family == AF_INET6) && \ |
384 | ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr)) && \ |
385 | ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr)) && \ |
386 | (!(__sk)->sk_bound_dev_if || \ |
387 | ((__sk)->sk_bound_dev_if == (__dif))) && \ |
388 | net_eq(sock_net(__sk), (__net))) |
389 | |
390 | #endif /* _IPV6_H */ |
391 |
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