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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; |
6b2e04bc | 34 | __u32 ra_defrtr_metric; |
8013d1d7 | 35 | __s32 accept_ra_min_hop_limit; |
c4fd30eb | 36 | __s32 accept_ra_pinfo; |
35103d11 | 37 | __s32 ignore_routes_with_linkdown; |
930d6ff2 YH |
38 | #ifdef CONFIG_IPV6_ROUTER_PREF |
39 | __s32 accept_ra_rtr_pref; | |
52e16356 | 40 | __s32 rtr_probe_interval; |
09c884d4 | 41 | #ifdef CONFIG_IPV6_ROUTE_INFO |
bbea124b | 42 | __s32 accept_ra_rt_info_min_plen; |
09c884d4 YH |
43 | __s32 accept_ra_rt_info_max_plen; |
44 | #endif | |
930d6ff2 | 45 | #endif |
fbea49e1 | 46 | __s32 proxy_ndp; |
0bcbc926 | 47 | __s32 accept_source_route; |
d9333196 | 48 | __s32 accept_ra_from_local; |
95c385b4 NH |
49 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
50 | __s32 optimistic_dad; | |
7fd2561e | 51 | __s32 use_optimistic; |
7bc570c8 YH |
52 | #endif |
53 | #ifdef CONFIG_IPV6_MROUTE | |
54 | __s32 mc_forwarding; | |
95c385b4 | 55 | #endif |
778d80be | 56 | __s32 disable_ipv6; |
abbc3043 | 57 | __s32 drop_unicast_in_l2_multicast; |
1b34be74 | 58 | __s32 accept_dad; |
f7734fdf | 59 | __s32 force_tllao; |
5cb04436 | 60 | __s32 ndisc_notify; |
b800c3b9 | 61 | __s32 suppress_frag_ndisc; |
c2943f14 | 62 | __s32 accept_ra_mtu; |
7a02bf89 | 63 | __s32 drop_unsolicited_na; |
3d1bec99 HFS |
64 | struct ipv6_stable_secret { |
65 | bool initialized; | |
66 | struct in6_addr secret; | |
67 | } stable_secret; | |
3985e8a3 | 68 | __s32 use_oif_addrs_only; |
f1705ec1 | 69 | __s32 keep_addr_on_down; |
1ababeba | 70 | __s32 seg6_enabled; |
bf355b8d DL |
71 | #ifdef CONFIG_IPV6_SEG6_HMAC |
72 | __s32 seg6_require_hmac; | |
73 | #endif | |
adc176c5 | 74 | __u32 enhanced_dad; |
d35a00b8 | 75 | __u32 addr_gen_mode; |
df789fe7 | 76 | __s32 disable_policy; |
2210d6b2 | 77 | __s32 ndisc_tclass; |
8610c7c6 | 78 | __s32 rpl_seg_enabled; |
607ea7cd KK |
79 | |
80 | struct ctl_table_header *sysctl_header; | |
1da177e4 | 81 | }; |
56d417b1 BH |
82 | |
83 | struct ipv6_params { | |
84 | __s32 disable_ipv6; | |
85 | __s32 autoconf; | |
86 | }; | |
87 | extern struct ipv6_params ipv6_defaults; | |
1da177e4 LT |
88 | #include <linux/tcp.h> |
89 | #include <linux/udp.h> | |
90 | ||
14c85021 ACM |
91 | #include <net/inet_sock.h> |
92 | ||
0660e03f ACM |
93 | static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) |
94 | { | |
95 | return (struct ipv6hdr *)skb_network_header(skb); | |
96 | } | |
97 | ||
6a674e9c JG |
98 | static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb) |
99 | { | |
100 | return (struct ipv6hdr *)skb_inner_network_header(skb); | |
101 | } | |
102 | ||
39b89160 ACM |
103 | static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb) |
104 | { | |
9c70220b | 105 | return (struct ipv6hdr *)skb_transport_header(skb); |
39b89160 ACM |
106 | } |
107 | ||
ba5ea614 LL |
108 | static inline unsigned int ipv6_transport_len(const struct sk_buff *skb) |
109 | { | |
110 | return ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr) - | |
111 | skb_network_header_len(skb); | |
112 | } | |
113 | ||
1da177e4 LT |
114 | /* |
115 | This structure contains results of exthdrs parsing | |
116 | as offsets from skb->nh. | |
117 | */ | |
118 | ||
119 | struct inet6_skb_parm { | |
120 | int iif; | |
dd3332bf | 121 | __be16 ra; |
1da177e4 LT |
122 | __u16 dst0; |
123 | __u16 srcrt; | |
124 | __u16 dst1; | |
333fad53 | 125 | __u16 lastopt; |
e7c38157 | 126 | __u16 nhoff; |
3e3850e9 | 127 | __u16 flags; |
59fbb3a6 | 128 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
8dd7368d DM |
129 | __u16 dsthao; |
130 | #endif | |
4cdd3408 | 131 | __u16 frag_max_size; |
3e3850e9 PM |
132 | |
133 | #define IP6SKB_XFRM_TRANSFORMED 1 | |
7bc570c8 | 134 | #define IP6SKB_FORWARDED 2 |
9c6eb28a | 135 | #define IP6SKB_REROUTED 4 |
dd3332bf | 136 | #define IP6SKB_ROUTERALERT 8 |
f46078cf | 137 | #define IP6SKB_FRAGMENTED 16 |
8b58a398 | 138 | #define IP6SKB_HOPBYHOP 32 |
74b20582 | 139 | #define IP6SKB_L3SLAVE 64 |
cb891fa6 | 140 | #define IP6SKB_JUMBOGRAM 128 |
1da177e4 LT |
141 | }; |
142 | ||
74b20582 | 143 | #if defined(CONFIG_NET_L3_MASTER_DEV) |
a04a480d | 144 | static inline bool ipv6_l3mdev_skb(__u16 flags) |
74b20582 DA |
145 | { |
146 | return flags & IP6SKB_L3SLAVE; | |
147 | } | |
148 | #else | |
a04a480d | 149 | static inline bool ipv6_l3mdev_skb(__u16 flags) |
74b20582 DA |
150 | { |
151 | return false; | |
152 | } | |
153 | #endif | |
154 | ||
1da177e4 | 155 | #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) |
4b340ae2 | 156 | #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb)) |
1da177e4 | 157 | |
505cbfc5 ACM |
158 | static inline int inet6_iif(const struct sk_buff *skb) |
159 | { | |
a04a480d | 160 | bool l3_slave = ipv6_l3mdev_skb(IP6CB(skb)->flags); |
74b20582 DA |
161 | |
162 | return l3_slave ? skb->skb_iif : IP6CB(skb)->iif; | |
505cbfc5 | 163 | } |
cb891fa6 PA |
164 | |
165 | static inline bool inet6_is_jumbogram(const struct sk_buff *skb) | |
166 | { | |
167 | return !!(IP6CB(skb)->flags & IP6SKB_JUMBOGRAM); | |
168 | } | |
1801b570 DA |
169 | |
170 | /* can not be used in TCP layer after tcp_v6_fill_cb */ | |
171 | static inline int inet6_sdif(const struct sk_buff *skb) | |
172 | { | |
173 | #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV) | |
174 | if (skb && ipv6_l3mdev_skb(IP6CB(skb)->flags)) | |
175 | return IP6CB(skb)->iif; | |
176 | #endif | |
177 | return 0; | |
178 | } | |
505cbfc5 | 179 | |
ca304b61 ACM |
180 | struct tcp6_request_sock { |
181 | struct tcp_request_sock tcp6rsk_tcp; | |
ca304b61 | 182 | }; |
2e6599cb | 183 | |
20283d84 HX |
184 | struct ipv6_mc_socklist; |
185 | struct ipv6_ac_socklist; | |
186 | struct ipv6_fl_socklist; | |
187 | ||
366e41d9 VY |
188 | struct inet6_cork { |
189 | struct ipv6_txoptions *opt; | |
190 | u8 hop_limit; | |
191 | u8 tclass; | |
192 | }; | |
193 | ||
1da177e4 LT |
194 | /** |
195 | * struct ipv6_pinfo - ipv6 private area | |
196 | * | |
197 | * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc) | |
198 | * this _must_ be the last member, so that inet6_sk_generic | |
199 | * is able to calculate its offset from the base struct sock | |
200 | * by using the struct proto->slab_obj_size member. -acme | |
201 | */ | |
202 | struct ipv6_pinfo { | |
203 | struct in6_addr saddr; | |
b24a2516 | 204 | struct in6_pktinfo sticky_pktinfo; |
d3818c92 | 205 | const struct in6_addr *daddr_cache; |
8e1ef0a9 | 206 | #ifdef CONFIG_IPV6_SUBTREES |
d3818c92 | 207 | const struct in6_addr *saddr_cache; |
8e1ef0a9 | 208 | #endif |
1da177e4 | 209 | |
90bcaf7b | 210 | __be32 flow_label; |
1da177e4 | 211 | __u32 frag_size; |
1d5d236d YH |
212 | |
213 | /* | |
214 | * Packed in 16bits. | |
59632b22 | 215 | * Omit one shift by putting the signed field at MSB. |
1d5d236d YH |
216 | */ |
217 | #if defined(__BIG_ENDIAN_BITFIELD) | |
218 | __s16 hop_limit:9; | |
219 | __u16 __unused_1:7; | |
220 | #else | |
221 | __u16 __unused_1:7; | |
222 | __s16 hop_limit:9; | |
223 | #endif | |
224 | ||
225 | #if defined(__BIG_ENDIAN_BITFIELD) | |
226 | /* Packed in 16bits. */ | |
227 | __s16 mcast_hops:9; | |
228 | __u16 __unused_2:6, | |
229 | mc_loop:1; | |
230 | #else | |
231 | __u16 mc_loop:1, | |
232 | __unused_2:6; | |
233 | __s16 mcast_hops:9; | |
234 | #endif | |
c4062dfc | 235 | int ucast_oif; |
1da177e4 LT |
236 | int mcast_oif; |
237 | ||
238 | /* pktoption flags */ | |
239 | union { | |
240 | struct { | |
4c752098 YH |
241 | __u16 srcrt:1, |
242 | osrcrt:1, | |
1da177e4 | 243 | rxinfo:1, |
333fad53 | 244 | rxoinfo:1, |
1da177e4 | 245 | rxhlim:1, |
333fad53 | 246 | rxohlim:1, |
1da177e4 | 247 | hopopts:1, |
333fad53 | 248 | ohopopts:1, |
1da177e4 | 249 | dstopts:1, |
333fad53 | 250 | odstopts:1, |
41a1f8ea | 251 | rxflow:1, |
793b1473 | 252 | rxtclass:1, |
6c468622 | 253 | rxpmtu:1, |
0cc0aa61 WB |
254 | rxorigdstaddr:1, |
255 | recvfragsize:1; | |
256 | /* 1 bits hole */ | |
1da177e4 | 257 | } bits; |
333fad53 | 258 | __u16 all; |
1da177e4 LT |
259 | } rxopt; |
260 | ||
261 | /* sockopt flags */ | |
793b1473 | 262 | __u16 recverr:1, |
1da177e4 | 263 | sndflow:1, |
df3687ff | 264 | repflow:1, |
93b36cf3 | 265 | pmtudisc:3, |
9fe516ba | 266 | padding:1, /* 1 bit hole */ |
793b1473 | 267 | srcprefs:3, /* 001: prefer temporary address |
7cbca67c YH |
268 | * 010: prefer public address |
269 | * 100: prefer care-of address | |
270 | */ | |
cb1ce2ef | 271 | dontfrag:1, |
513674b5 | 272 | autoflowlabel:1, |
15033f04 | 273 | autoflowlabel_set:1, |
9036b2fe | 274 | mc_all:1, |
01370434 | 275 | recverr_rfc4884:1, |
9036b2fe | 276 | rtalert_isolate:1; |
e802af9c | 277 | __u8 min_hopcount; |
41a1f8ea | 278 | __u8 tclass; |
1397ed35 | 279 | __be32 rcv_flowinfo; |
1da177e4 LT |
280 | |
281 | __u32 dst_cookie; | |
5d299f3d | 282 | __u32 rx_dst_cookie; |
1da177e4 | 283 | |
456b61bc | 284 | struct ipv6_mc_socklist __rcu *ipv6_mc_list; |
1da177e4 | 285 | struct ipv6_ac_socklist *ipv6_ac_list; |
18367681 | 286 | struct ipv6_fl_socklist __rcu *ipv6_fl_list; |
1da177e4 | 287 | |
45f6fad8 | 288 | struct ipv6_txoptions __rcu *opt; |
1da177e4 | 289 | struct sk_buff *pktoptions; |
4b340ae2 | 290 | struct sk_buff *rxpmtu; |
366e41d9 | 291 | struct inet6_cork cork; |
1da177e4 LT |
292 | }; |
293 | ||
294 | /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ | |
295 | struct raw6_sock { | |
296 | /* inet_sock has to be the first member of raw6_sock */ | |
297 | struct inet_sock inet; | |
298 | __u32 checksum; /* perform checksum */ | |
299 | __u32 offset; /* checksum offset */ | |
300 | struct icmp6_filter filter; | |
d1db275d | 301 | __u32 ip6mr_table; |
1da177e4 LT |
302 | /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */ |
303 | struct ipv6_pinfo inet6; | |
304 | }; | |
305 | ||
306 | struct udp6_sock { | |
307 | struct udp_sock udp; | |
308 | /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */ | |
309 | struct ipv6_pinfo inet6; | |
310 | }; | |
311 | ||
312 | struct tcp6_sock { | |
313 | struct tcp_sock tcp; | |
314 | /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */ | |
315 | struct ipv6_pinfo inet6; | |
316 | }; | |
317 | ||
b9750ce1 ACM |
318 | extern int inet6_sk_rebuild_header(struct sock *sk); |
319 | ||
48ee3569 DM |
320 | struct tcp6_timewait_sock { |
321 | struct tcp_timewait_sock tcp6tw_tcp; | |
48ee3569 DM |
322 | }; |
323 | ||
dfd56b8b | 324 | #if IS_ENABLED(CONFIG_IPV6) |
e4348637 DA |
325 | bool ipv6_mod_enabled(void); |
326 | ||
e7eadb4d | 327 | static inline struct ipv6_pinfo *inet6_sk(const struct sock *__sk) |
1da177e4 | 328 | { |
e7eadb4d | 329 | return sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL; |
1da177e4 LT |
330 | } |
331 | ||
332 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) | |
333 | { | |
334 | return (struct raw6_sock *)sk; | |
335 | } | |
336 | ||
9fe516ba ED |
337 | #define __ipv6_only_sock(sk) (sk->sk_ipv6only) |
338 | #define ipv6_only_sock(sk) (__ipv6_only_sock(sk)) | |
4b261c75 HFS |
339 | #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \ |
340 | inet6_sk(sk)->rxopt.bits.rxinfo) | |
8feaf0c0 | 341 | |
efe4208f | 342 | static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk) |
8feaf0c0 | 343 | { |
efe4208f ED |
344 | if (sk->sk_family == AF_INET6) |
345 | return &sk->sk_v6_rcv_saddr; | |
346 | return NULL; | |
8feaf0c0 ACM |
347 | } |
348 | ||
463c84b9 | 349 | static inline int inet_v6_ipv6only(const struct sock *sk) |
8feaf0c0 | 350 | { |
9fe516ba ED |
351 | /* ipv6only field is at same position for timewait and other sockets */ |
352 | return ipv6_only_sock(sk); | |
8feaf0c0 | 353 | } |
1da177e4 LT |
354 | #else |
355 | #define __ipv6_only_sock(sk) 0 | |
356 | #define ipv6_only_sock(sk) 0 | |
4b261c75 | 357 | #define ipv6_sk_rxinfo(sk) 0 |
1da177e4 | 358 | |
e4348637 DA |
359 | static inline bool ipv6_mod_enabled(void) |
360 | { | |
361 | return false; | |
362 | } | |
363 | ||
1da177e4 LT |
364 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) |
365 | { | |
366 | return NULL; | |
367 | } | |
368 | ||
ca304b61 ACM |
369 | static inline struct inet6_request_sock * |
370 | inet6_rsk(const struct request_sock *rsk) | |
371 | { | |
372 | return NULL; | |
373 | } | |
374 | ||
1da177e4 LT |
375 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
376 | { | |
377 | return NULL; | |
378 | } | |
379 | ||
0fa1a53e | 380 | #define inet6_rcv_saddr(__sk) NULL |
8feaf0c0 | 381 | #define tcp_twsk_ipv6only(__sk) 0 |
463c84b9 | 382 | #define inet_v6_ipv6only(__sk) 0 |
dfd56b8b | 383 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
8feaf0c0 | 384 | #endif /* _IPV6_H */ |