Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _IPV6_H |
3 | #define _IPV6_H | |
4 | ||
607ca46e | 5 | #include <uapi/linux/ipv6.h> |
1da177e4 | 6 | |
1da177e4 | 7 | #define ipv6_optlen(p) (((p)->hdrlen+1) << 3) |
1431fb31 | 8 | #define ipv6_authlen(p) (((p)->hdrlen+2) << 2) |
1da177e4 LT |
9 | /* |
10 | * This structure contains configuration options per IPv6 link. | |
11 | */ | |
12 | struct ipv6_devconf { | |
13 | __s32 forwarding; | |
14 | __s32 hop_limit; | |
15 | __s32 mtu6; | |
16 | __s32 accept_ra; | |
17 | __s32 accept_redirects; | |
18 | __s32 autoconf; | |
19 | __s32 dad_transmits; | |
20 | __s32 rtr_solicits; | |
21 | __s32 rtr_solicit_interval; | |
bd11f074 | 22 | __s32 rtr_solicit_max_interval; |
1da177e4 LT |
23 | __s32 rtr_solicit_delay; |
24 | __s32 force_mld_version; | |
fc4eba58 HFS |
25 | __s32 mldv1_unsolicited_report_interval; |
26 | __s32 mldv2_unsolicited_report_interval; | |
1da177e4 LT |
27 | __s32 use_tempaddr; |
28 | __s32 temp_valid_lft; | |
29 | __s32 temp_prefered_lft; | |
30 | __s32 regen_max_retry; | |
31 | __s32 max_desync_factor; | |
1da177e4 | 32 | __s32 max_addresses; |
65f5c7c1 | 33 | __s32 accept_ra_defrtr; |
8013d1d7 | 34 | __s32 accept_ra_min_hop_limit; |
c4fd30eb | 35 | __s32 accept_ra_pinfo; |
35103d11 | 36 | __s32 ignore_routes_with_linkdown; |
930d6ff2 YH |
37 | #ifdef CONFIG_IPV6_ROUTER_PREF |
38 | __s32 accept_ra_rtr_pref; | |
52e16356 | 39 | __s32 rtr_probe_interval; |
09c884d4 | 40 | #ifdef CONFIG_IPV6_ROUTE_INFO |
bbea124b | 41 | __s32 accept_ra_rt_info_min_plen; |
09c884d4 YH |
42 | __s32 accept_ra_rt_info_max_plen; |
43 | #endif | |
930d6ff2 | 44 | #endif |
fbea49e1 | 45 | __s32 proxy_ndp; |
0bcbc926 | 46 | __s32 accept_source_route; |
d9333196 | 47 | __s32 accept_ra_from_local; |
95c385b4 NH |
48 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
49 | __s32 optimistic_dad; | |
7fd2561e | 50 | __s32 use_optimistic; |
7bc570c8 YH |
51 | #endif |
52 | #ifdef CONFIG_IPV6_MROUTE | |
53 | __s32 mc_forwarding; | |
95c385b4 | 54 | #endif |
778d80be | 55 | __s32 disable_ipv6; |
abbc3043 | 56 | __s32 drop_unicast_in_l2_multicast; |
1b34be74 | 57 | __s32 accept_dad; |
f7734fdf | 58 | __s32 force_tllao; |
5cb04436 | 59 | __s32 ndisc_notify; |
b800c3b9 | 60 | __s32 suppress_frag_ndisc; |
c2943f14 | 61 | __s32 accept_ra_mtu; |
7a02bf89 | 62 | __s32 drop_unsolicited_na; |
3d1bec99 HFS |
63 | struct ipv6_stable_secret { |
64 | bool initialized; | |
65 | struct in6_addr secret; | |
66 | } stable_secret; | |
3985e8a3 | 67 | __s32 use_oif_addrs_only; |
f1705ec1 | 68 | __s32 keep_addr_on_down; |
1ababeba | 69 | __s32 seg6_enabled; |
bf355b8d DL |
70 | #ifdef CONFIG_IPV6_SEG6_HMAC |
71 | __s32 seg6_require_hmac; | |
72 | #endif | |
adc176c5 | 73 | __u32 enhanced_dad; |
d35a00b8 | 74 | __u32 addr_gen_mode; |
df789fe7 | 75 | __s32 disable_policy; |
2210d6b2 | 76 | __s32 ndisc_tclass; |
607ea7cd KK |
77 | |
78 | struct ctl_table_header *sysctl_header; | |
1da177e4 | 79 | }; |
56d417b1 BH |
80 | |
81 | struct ipv6_params { | |
82 | __s32 disable_ipv6; | |
83 | __s32 autoconf; | |
84 | }; | |
85 | extern struct ipv6_params ipv6_defaults; | |
1da177e4 | 86 | #include <linux/icmpv6.h> |
1da177e4 LT |
87 | #include <linux/tcp.h> |
88 | #include <linux/udp.h> | |
89 | ||
14c85021 ACM |
90 | #include <net/inet_sock.h> |
91 | ||
0660e03f ACM |
92 | static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) |
93 | { | |
94 | return (struct ipv6hdr *)skb_network_header(skb); | |
95 | } | |
96 | ||
6a674e9c JG |
97 | static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb) |
98 | { | |
99 | return (struct ipv6hdr *)skb_inner_network_header(skb); | |
100 | } | |
101 | ||
39b89160 ACM |
102 | static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb) |
103 | { | |
9c70220b | 104 | return (struct ipv6hdr *)skb_transport_header(skb); |
39b89160 ACM |
105 | } |
106 | ||
1da177e4 LT |
107 | /* |
108 | This structure contains results of exthdrs parsing | |
109 | as offsets from skb->nh. | |
110 | */ | |
111 | ||
112 | struct inet6_skb_parm { | |
113 | int iif; | |
dd3332bf | 114 | __be16 ra; |
1da177e4 LT |
115 | __u16 dst0; |
116 | __u16 srcrt; | |
117 | __u16 dst1; | |
333fad53 | 118 | __u16 lastopt; |
e7c38157 | 119 | __u16 nhoff; |
3e3850e9 | 120 | __u16 flags; |
59fbb3a6 | 121 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
8dd7368d DM |
122 | __u16 dsthao; |
123 | #endif | |
4cdd3408 | 124 | __u16 frag_max_size; |
3e3850e9 PM |
125 | |
126 | #define IP6SKB_XFRM_TRANSFORMED 1 | |
7bc570c8 | 127 | #define IP6SKB_FORWARDED 2 |
9c6eb28a | 128 | #define IP6SKB_REROUTED 4 |
dd3332bf | 129 | #define IP6SKB_ROUTERALERT 8 |
f46078cf | 130 | #define IP6SKB_FRAGMENTED 16 |
8b58a398 | 131 | #define IP6SKB_HOPBYHOP 32 |
74b20582 | 132 | #define IP6SKB_L3SLAVE 64 |
cb891fa6 | 133 | #define IP6SKB_JUMBOGRAM 128 |
1da177e4 LT |
134 | }; |
135 | ||
74b20582 | 136 | #if defined(CONFIG_NET_L3_MASTER_DEV) |
a04a480d | 137 | static inline bool ipv6_l3mdev_skb(__u16 flags) |
74b20582 DA |
138 | { |
139 | return flags & IP6SKB_L3SLAVE; | |
140 | } | |
141 | #else | |
a04a480d | 142 | static inline bool ipv6_l3mdev_skb(__u16 flags) |
74b20582 DA |
143 | { |
144 | return false; | |
145 | } | |
146 | #endif | |
147 | ||
1da177e4 | 148 | #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) |
4b340ae2 | 149 | #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb)) |
1da177e4 | 150 | |
505cbfc5 ACM |
151 | static inline int inet6_iif(const struct sk_buff *skb) |
152 | { | |
a04a480d | 153 | bool l3_slave = ipv6_l3mdev_skb(IP6CB(skb)->flags); |
74b20582 DA |
154 | |
155 | return l3_slave ? skb->skb_iif : IP6CB(skb)->iif; | |
505cbfc5 | 156 | } |
cb891fa6 PA |
157 | |
158 | static inline bool inet6_is_jumbogram(const struct sk_buff *skb) | |
159 | { | |
160 | return !!(IP6CB(skb)->flags & IP6SKB_JUMBOGRAM); | |
161 | } | |
1801b570 DA |
162 | |
163 | /* can not be used in TCP layer after tcp_v6_fill_cb */ | |
164 | static inline int inet6_sdif(const struct sk_buff *skb) | |
165 | { | |
166 | #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV) | |
167 | if (skb && ipv6_l3mdev_skb(IP6CB(skb)->flags)) | |
168 | return IP6CB(skb)->iif; | |
169 | #endif | |
170 | return 0; | |
171 | } | |
505cbfc5 | 172 | |
a04a480d DA |
173 | /* can not be used in TCP layer after tcp_v6_fill_cb */ |
174 | static inline bool inet6_exact_dif_match(struct net *net, struct sk_buff *skb) | |
175 | { | |
176 | #if defined(CONFIG_NET_L3_MASTER_DEV) | |
177 | if (!net->ipv4.sysctl_tcp_l3mdev_accept && | |
da96786e | 178 | skb && ipv6_l3mdev_skb(IP6CB(skb)->flags)) |
a04a480d DA |
179 | return true; |
180 | #endif | |
181 | return false; | |
182 | } | |
183 | ||
ca304b61 ACM |
184 | struct tcp6_request_sock { |
185 | struct tcp_request_sock tcp6rsk_tcp; | |
ca304b61 | 186 | }; |
2e6599cb | 187 | |
20283d84 HX |
188 | struct ipv6_mc_socklist; |
189 | struct ipv6_ac_socklist; | |
190 | struct ipv6_fl_socklist; | |
191 | ||
366e41d9 VY |
192 | struct inet6_cork { |
193 | struct ipv6_txoptions *opt; | |
194 | u8 hop_limit; | |
195 | u8 tclass; | |
196 | }; | |
197 | ||
1da177e4 LT |
198 | /** |
199 | * struct ipv6_pinfo - ipv6 private area | |
200 | * | |
201 | * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc) | |
202 | * this _must_ be the last member, so that inet6_sk_generic | |
203 | * is able to calculate its offset from the base struct sock | |
204 | * by using the struct proto->slab_obj_size member. -acme | |
205 | */ | |
206 | struct ipv6_pinfo { | |
207 | struct in6_addr saddr; | |
b24a2516 | 208 | struct in6_pktinfo sticky_pktinfo; |
d3818c92 | 209 | const struct in6_addr *daddr_cache; |
8e1ef0a9 | 210 | #ifdef CONFIG_IPV6_SUBTREES |
d3818c92 | 211 | const struct in6_addr *saddr_cache; |
8e1ef0a9 | 212 | #endif |
1da177e4 | 213 | |
90bcaf7b | 214 | __be32 flow_label; |
1da177e4 | 215 | __u32 frag_size; |
1d5d236d YH |
216 | |
217 | /* | |
218 | * Packed in 16bits. | |
219 | * Omit one shift by by putting the signed field at MSB. | |
220 | */ | |
221 | #if defined(__BIG_ENDIAN_BITFIELD) | |
222 | __s16 hop_limit:9; | |
223 | __u16 __unused_1:7; | |
224 | #else | |
225 | __u16 __unused_1:7; | |
226 | __s16 hop_limit:9; | |
227 | #endif | |
228 | ||
229 | #if defined(__BIG_ENDIAN_BITFIELD) | |
230 | /* Packed in 16bits. */ | |
231 | __s16 mcast_hops:9; | |
232 | __u16 __unused_2:6, | |
233 | mc_loop:1; | |
234 | #else | |
235 | __u16 mc_loop:1, | |
236 | __unused_2:6; | |
237 | __s16 mcast_hops:9; | |
238 | #endif | |
c4062dfc | 239 | int ucast_oif; |
1da177e4 LT |
240 | int mcast_oif; |
241 | ||
242 | /* pktoption flags */ | |
243 | union { | |
244 | struct { | |
4c752098 YH |
245 | __u16 srcrt:1, |
246 | osrcrt:1, | |
1da177e4 | 247 | rxinfo:1, |
333fad53 | 248 | rxoinfo:1, |
1da177e4 | 249 | rxhlim:1, |
333fad53 | 250 | rxohlim:1, |
1da177e4 | 251 | hopopts:1, |
333fad53 | 252 | ohopopts:1, |
1da177e4 | 253 | dstopts:1, |
333fad53 | 254 | odstopts:1, |
41a1f8ea | 255 | rxflow:1, |
793b1473 | 256 | rxtclass:1, |
6c468622 | 257 | rxpmtu:1, |
0cc0aa61 WB |
258 | rxorigdstaddr:1, |
259 | recvfragsize:1; | |
260 | /* 1 bits hole */ | |
1da177e4 | 261 | } bits; |
333fad53 | 262 | __u16 all; |
1da177e4 LT |
263 | } rxopt; |
264 | ||
265 | /* sockopt flags */ | |
793b1473 | 266 | __u16 recverr:1, |
1da177e4 | 267 | sndflow:1, |
df3687ff | 268 | repflow:1, |
93b36cf3 | 269 | pmtudisc:3, |
9fe516ba | 270 | padding:1, /* 1 bit hole */ |
793b1473 | 271 | srcprefs:3, /* 001: prefer temporary address |
7cbca67c YH |
272 | * 010: prefer public address |
273 | * 100: prefer care-of address | |
274 | */ | |
cb1ce2ef | 275 | dontfrag:1, |
513674b5 SL |
276 | autoflowlabel:1, |
277 | autoflowlabel_set:1; | |
e802af9c | 278 | __u8 min_hopcount; |
41a1f8ea | 279 | __u8 tclass; |
1397ed35 | 280 | __be32 rcv_flowinfo; |
1da177e4 LT |
281 | |
282 | __u32 dst_cookie; | |
5d299f3d | 283 | __u32 rx_dst_cookie; |
1da177e4 | 284 | |
456b61bc | 285 | struct ipv6_mc_socklist __rcu *ipv6_mc_list; |
1da177e4 | 286 | struct ipv6_ac_socklist *ipv6_ac_list; |
18367681 | 287 | struct ipv6_fl_socklist __rcu *ipv6_fl_list; |
1da177e4 | 288 | |
45f6fad8 | 289 | struct ipv6_txoptions __rcu *opt; |
1da177e4 | 290 | struct sk_buff *pktoptions; |
4b340ae2 | 291 | struct sk_buff *rxpmtu; |
366e41d9 | 292 | struct inet6_cork cork; |
1da177e4 LT |
293 | }; |
294 | ||
295 | /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ | |
296 | struct raw6_sock { | |
297 | /* inet_sock has to be the first member of raw6_sock */ | |
298 | struct inet_sock inet; | |
299 | __u32 checksum; /* perform checksum */ | |
300 | __u32 offset; /* checksum offset */ | |
301 | struct icmp6_filter filter; | |
d1db275d | 302 | __u32 ip6mr_table; |
1da177e4 LT |
303 | /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */ |
304 | struct ipv6_pinfo inet6; | |
305 | }; | |
306 | ||
307 | struct udp6_sock { | |
308 | struct udp_sock udp; | |
309 | /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */ | |
310 | struct ipv6_pinfo inet6; | |
311 | }; | |
312 | ||
313 | struct tcp6_sock { | |
314 | struct tcp_sock tcp; | |
315 | /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */ | |
316 | struct ipv6_pinfo inet6; | |
317 | }; | |
318 | ||
b9750ce1 ACM |
319 | extern int inet6_sk_rebuild_header(struct sock *sk); |
320 | ||
48ee3569 DM |
321 | struct tcp6_timewait_sock { |
322 | struct tcp_timewait_sock tcp6tw_tcp; | |
48ee3569 DM |
323 | }; |
324 | ||
dfd56b8b | 325 | #if IS_ENABLED(CONFIG_IPV6) |
e4348637 DA |
326 | bool ipv6_mod_enabled(void); |
327 | ||
e7eadb4d | 328 | static inline struct ipv6_pinfo *inet6_sk(const struct sock *__sk) |
1da177e4 | 329 | { |
e7eadb4d | 330 | return sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL; |
1da177e4 LT |
331 | } |
332 | ||
333 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) | |
334 | { | |
335 | return (struct raw6_sock *)sk; | |
336 | } | |
337 | ||
338 | static inline void inet_sk_copy_descendant(struct sock *sk_to, | |
339 | const struct sock *sk_from) | |
340 | { | |
341 | int ancestor_size = sizeof(struct inet_sock); | |
342 | ||
343 | if (sk_from->sk_family == PF_INET6) | |
344 | ancestor_size += sizeof(struct ipv6_pinfo); | |
345 | ||
346 | __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size); | |
347 | } | |
348 | ||
9fe516ba ED |
349 | #define __ipv6_only_sock(sk) (sk->sk_ipv6only) |
350 | #define ipv6_only_sock(sk) (__ipv6_only_sock(sk)) | |
4b261c75 HFS |
351 | #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \ |
352 | inet6_sk(sk)->rxopt.bits.rxinfo) | |
8feaf0c0 | 353 | |
efe4208f | 354 | static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk) |
8feaf0c0 | 355 | { |
efe4208f ED |
356 | if (sk->sk_family == AF_INET6) |
357 | return &sk->sk_v6_rcv_saddr; | |
358 | return NULL; | |
8feaf0c0 ACM |
359 | } |
360 | ||
463c84b9 | 361 | static inline int inet_v6_ipv6only(const struct sock *sk) |
8feaf0c0 | 362 | { |
9fe516ba ED |
363 | /* ipv6only field is at same position for timewait and other sockets */ |
364 | return ipv6_only_sock(sk); | |
8feaf0c0 | 365 | } |
1da177e4 LT |
366 | #else |
367 | #define __ipv6_only_sock(sk) 0 | |
368 | #define ipv6_only_sock(sk) 0 | |
4b261c75 | 369 | #define ipv6_sk_rxinfo(sk) 0 |
1da177e4 | 370 | |
e4348637 DA |
371 | static inline bool ipv6_mod_enabled(void) |
372 | { | |
373 | return false; | |
374 | } | |
375 | ||
1da177e4 LT |
376 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) |
377 | { | |
378 | return NULL; | |
379 | } | |
380 | ||
ca304b61 ACM |
381 | static inline struct inet6_request_sock * |
382 | inet6_rsk(const struct request_sock *rsk) | |
383 | { | |
384 | return NULL; | |
385 | } | |
386 | ||
1da177e4 LT |
387 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
388 | { | |
389 | return NULL; | |
390 | } | |
391 | ||
0fa1a53e | 392 | #define inet6_rcv_saddr(__sk) NULL |
8feaf0c0 | 393 | #define tcp_twsk_ipv6only(__sk) 0 |
463c84b9 | 394 | #define inet_v6_ipv6only(__sk) 0 |
dfd56b8b | 395 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
8feaf0c0 | 396 | #endif /* _IPV6_H */ |