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