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