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; | |
21 | __s32 rtr_solicit_delay; | |
22 | __s32 force_mld_version; | |
fc4eba58 HFS |
23 | __s32 mldv1_unsolicited_report_interval; |
24 | __s32 mldv2_unsolicited_report_interval; | |
1da177e4 LT |
25 | __s32 use_tempaddr; |
26 | __s32 temp_valid_lft; | |
27 | __s32 temp_prefered_lft; | |
28 | __s32 regen_max_retry; | |
29 | __s32 max_desync_factor; | |
1da177e4 | 30 | __s32 max_addresses; |
65f5c7c1 | 31 | __s32 accept_ra_defrtr; |
c4fd30eb | 32 | __s32 accept_ra_pinfo; |
930d6ff2 YH |
33 | #ifdef CONFIG_IPV6_ROUTER_PREF |
34 | __s32 accept_ra_rtr_pref; | |
52e16356 | 35 | __s32 rtr_probe_interval; |
09c884d4 YH |
36 | #ifdef CONFIG_IPV6_ROUTE_INFO |
37 | __s32 accept_ra_rt_info_max_plen; | |
38 | #endif | |
930d6ff2 | 39 | #endif |
fbea49e1 | 40 | __s32 proxy_ndp; |
0bcbc926 | 41 | __s32 accept_source_route; |
95c385b4 NH |
42 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
43 | __s32 optimistic_dad; | |
7bc570c8 YH |
44 | #endif |
45 | #ifdef CONFIG_IPV6_MROUTE | |
46 | __s32 mc_forwarding; | |
95c385b4 | 47 | #endif |
778d80be | 48 | __s32 disable_ipv6; |
1b34be74 | 49 | __s32 accept_dad; |
f7734fdf | 50 | __s32 force_tllao; |
5cb04436 | 51 | __s32 ndisc_notify; |
b800c3b9 | 52 | __s32 suppress_frag_ndisc; |
1da177e4 LT |
53 | void *sysctl; |
54 | }; | |
56d417b1 BH |
55 | |
56 | struct ipv6_params { | |
57 | __s32 disable_ipv6; | |
58 | __s32 autoconf; | |
59 | }; | |
60 | extern struct ipv6_params ipv6_defaults; | |
1da177e4 | 61 | #include <linux/icmpv6.h> |
1da177e4 LT |
62 | #include <linux/tcp.h> |
63 | #include <linux/udp.h> | |
64 | ||
14c85021 ACM |
65 | #include <net/inet_sock.h> |
66 | ||
0660e03f ACM |
67 | static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) |
68 | { | |
69 | return (struct ipv6hdr *)skb_network_header(skb); | |
70 | } | |
71 | ||
6a674e9c JG |
72 | static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb) |
73 | { | |
74 | return (struct ipv6hdr *)skb_inner_network_header(skb); | |
75 | } | |
76 | ||
39b89160 ACM |
77 | static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb) |
78 | { | |
9c70220b | 79 | return (struct ipv6hdr *)skb_transport_header(skb); |
39b89160 ACM |
80 | } |
81 | ||
1da177e4 LT |
82 | /* |
83 | This structure contains results of exthdrs parsing | |
84 | as offsets from skb->nh. | |
85 | */ | |
86 | ||
87 | struct inet6_skb_parm { | |
88 | int iif; | |
dd3332bf | 89 | __be16 ra; |
1da177e4 LT |
90 | __u16 hop; |
91 | __u16 dst0; | |
92 | __u16 srcrt; | |
93 | __u16 dst1; | |
333fad53 | 94 | __u16 lastopt; |
e7c38157 | 95 | __u16 nhoff; |
3e3850e9 | 96 | __u16 flags; |
59fbb3a6 | 97 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
8dd7368d DM |
98 | __u16 dsthao; |
99 | #endif | |
4cdd3408 | 100 | __u16 frag_max_size; |
3e3850e9 PM |
101 | |
102 | #define IP6SKB_XFRM_TRANSFORMED 1 | |
7bc570c8 | 103 | #define IP6SKB_FORWARDED 2 |
9c6eb28a | 104 | #define IP6SKB_REROUTED 4 |
dd3332bf | 105 | #define IP6SKB_ROUTERALERT 8 |
f46078cf | 106 | #define IP6SKB_FRAGMENTED 16 |
1da177e4 LT |
107 | }; |
108 | ||
109 | #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) | |
4b340ae2 | 110 | #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb)) |
1da177e4 | 111 | |
505cbfc5 ACM |
112 | static inline int inet6_iif(const struct sk_buff *skb) |
113 | { | |
114 | return IP6CB(skb)->iif; | |
115 | } | |
116 | ||
ca304b61 ACM |
117 | struct tcp6_request_sock { |
118 | struct tcp_request_sock tcp6rsk_tcp; | |
ca304b61 | 119 | }; |
2e6599cb | 120 | |
20283d84 HX |
121 | struct ipv6_mc_socklist; |
122 | struct ipv6_ac_socklist; | |
123 | struct ipv6_fl_socklist; | |
124 | ||
1da177e4 LT |
125 | /** |
126 | * struct ipv6_pinfo - ipv6 private area | |
127 | * | |
128 | * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc) | |
129 | * this _must_ be the last member, so that inet6_sk_generic | |
130 | * is able to calculate its offset from the base struct sock | |
131 | * by using the struct proto->slab_obj_size member. -acme | |
132 | */ | |
133 | struct ipv6_pinfo { | |
134 | struct in6_addr saddr; | |
b24a2516 | 135 | struct in6_pktinfo sticky_pktinfo; |
d3818c92 | 136 | const struct in6_addr *daddr_cache; |
8e1ef0a9 | 137 | #ifdef CONFIG_IPV6_SUBTREES |
d3818c92 | 138 | const struct in6_addr *saddr_cache; |
8e1ef0a9 | 139 | #endif |
1da177e4 | 140 | |
90bcaf7b | 141 | __be32 flow_label; |
1da177e4 | 142 | __u32 frag_size; |
1d5d236d YH |
143 | |
144 | /* | |
145 | * Packed in 16bits. | |
146 | * Omit one shift by by putting the signed field at MSB. | |
147 | */ | |
148 | #if defined(__BIG_ENDIAN_BITFIELD) | |
149 | __s16 hop_limit:9; | |
150 | __u16 __unused_1:7; | |
151 | #else | |
152 | __u16 __unused_1:7; | |
153 | __s16 hop_limit:9; | |
154 | #endif | |
155 | ||
156 | #if defined(__BIG_ENDIAN_BITFIELD) | |
157 | /* Packed in 16bits. */ | |
158 | __s16 mcast_hops:9; | |
159 | __u16 __unused_2:6, | |
160 | mc_loop:1; | |
161 | #else | |
162 | __u16 mc_loop:1, | |
163 | __unused_2:6; | |
164 | __s16 mcast_hops:9; | |
165 | #endif | |
c4062dfc | 166 | int ucast_oif; |
1da177e4 LT |
167 | int mcast_oif; |
168 | ||
169 | /* pktoption flags */ | |
170 | union { | |
171 | struct { | |
4c752098 YH |
172 | __u16 srcrt:1, |
173 | osrcrt:1, | |
1da177e4 | 174 | rxinfo:1, |
333fad53 | 175 | rxoinfo:1, |
1da177e4 | 176 | rxhlim:1, |
333fad53 | 177 | rxohlim:1, |
1da177e4 | 178 | hopopts:1, |
333fad53 | 179 | ohopopts:1, |
1da177e4 | 180 | dstopts:1, |
333fad53 | 181 | odstopts:1, |
41a1f8ea | 182 | rxflow:1, |
793b1473 | 183 | rxtclass:1, |
6c468622 BS |
184 | rxpmtu:1, |
185 | rxorigdstaddr:1; | |
186 | /* 2 bits hole */ | |
1da177e4 | 187 | } bits; |
333fad53 | 188 | __u16 all; |
1da177e4 LT |
189 | } rxopt; |
190 | ||
191 | /* sockopt flags */ | |
793b1473 | 192 | __u16 recverr:1, |
1da177e4 LT |
193 | sndflow:1, |
194 | pmtudisc:2, | |
7cbca67c | 195 | ipv6only:1, |
793b1473 | 196 | srcprefs:3, /* 001: prefer temporary address |
7cbca67c YH |
197 | * 010: prefer public address |
198 | * 100: prefer care-of address | |
199 | */ | |
793b1473 | 200 | dontfrag:1; |
e802af9c | 201 | __u8 min_hopcount; |
41a1f8ea | 202 | __u8 tclass; |
1397ed35 | 203 | __be32 rcv_flowinfo; |
1da177e4 LT |
204 | |
205 | __u32 dst_cookie; | |
5d299f3d | 206 | __u32 rx_dst_cookie; |
1da177e4 | 207 | |
456b61bc | 208 | struct ipv6_mc_socklist __rcu *ipv6_mc_list; |
1da177e4 | 209 | struct ipv6_ac_socklist *ipv6_ac_list; |
18367681 | 210 | struct ipv6_fl_socklist __rcu *ipv6_fl_list; |
1da177e4 LT |
211 | |
212 | struct ipv6_txoptions *opt; | |
213 | struct sk_buff *pktoptions; | |
4b340ae2 | 214 | struct sk_buff *rxpmtu; |
1da177e4 LT |
215 | struct { |
216 | struct ipv6_txoptions *opt; | |
47254745 YH |
217 | u8 hop_limit; |
218 | u8 tclass; | |
1da177e4 LT |
219 | } cork; |
220 | }; | |
221 | ||
222 | /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ | |
223 | struct raw6_sock { | |
224 | /* inet_sock has to be the first member of raw6_sock */ | |
225 | struct inet_sock inet; | |
226 | __u32 checksum; /* perform checksum */ | |
227 | __u32 offset; /* checksum offset */ | |
228 | struct icmp6_filter filter; | |
d1db275d | 229 | __u32 ip6mr_table; |
1da177e4 LT |
230 | /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */ |
231 | struct ipv6_pinfo inet6; | |
232 | }; | |
233 | ||
234 | struct udp6_sock { | |
235 | struct udp_sock udp; | |
236 | /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */ | |
237 | struct ipv6_pinfo inet6; | |
238 | }; | |
239 | ||
240 | struct tcp6_sock { | |
241 | struct tcp_sock tcp; | |
242 | /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */ | |
243 | struct ipv6_pinfo inet6; | |
244 | }; | |
245 | ||
b9750ce1 ACM |
246 | extern int inet6_sk_rebuild_header(struct sock *sk); |
247 | ||
48ee3569 DM |
248 | struct tcp6_timewait_sock { |
249 | struct tcp_timewait_sock tcp6tw_tcp; | |
48ee3569 DM |
250 | }; |
251 | ||
dfd56b8b | 252 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
253 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) |
254 | { | |
255 | return inet_sk(__sk)->pinet6; | |
256 | } | |
257 | ||
ca304b61 ACM |
258 | static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops) |
259 | { | |
260 | struct request_sock *req = reqsk_alloc(ops); | |
261 | ||
634fb979 ED |
262 | if (req) |
263 | inet_rsk(req)->pktopts = NULL; | |
ca304b61 ACM |
264 | |
265 | return req; | |
266 | } | |
267 | ||
1da177e4 LT |
268 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
269 | { | |
270 | return (struct raw6_sock *)sk; | |
271 | } | |
272 | ||
273 | static inline void inet_sk_copy_descendant(struct sock *sk_to, | |
274 | const struct sock *sk_from) | |
275 | { | |
276 | int ancestor_size = sizeof(struct inet_sock); | |
277 | ||
278 | if (sk_from->sk_family == PF_INET6) | |
279 | ancestor_size += sizeof(struct ipv6_pinfo); | |
280 | ||
281 | __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size); | |
282 | } | |
283 | ||
284 | #define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only) | |
285 | #define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk)) | |
8feaf0c0 | 286 | |
efe4208f | 287 | static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk) |
8feaf0c0 | 288 | { |
efe4208f ED |
289 | if (sk->sk_family == AF_INET6) |
290 | return &sk->sk_v6_rcv_saddr; | |
291 | return NULL; | |
8feaf0c0 ACM |
292 | } |
293 | ||
463c84b9 | 294 | static inline int inet_v6_ipv6only(const struct sock *sk) |
8feaf0c0 ACM |
295 | { |
296 | return likely(sk->sk_state != TCP_TIME_WAIT) ? | |
3f421baa | 297 | ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only; |
8feaf0c0 | 298 | } |
1da177e4 LT |
299 | #else |
300 | #define __ipv6_only_sock(sk) 0 | |
301 | #define ipv6_only_sock(sk) 0 | |
302 | ||
303 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) | |
304 | { | |
305 | return NULL; | |
306 | } | |
307 | ||
ca304b61 ACM |
308 | static inline struct inet6_request_sock * |
309 | inet6_rsk(const struct request_sock *rsk) | |
310 | { | |
311 | return NULL; | |
312 | } | |
313 | ||
1da177e4 LT |
314 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
315 | { | |
316 | return NULL; | |
317 | } | |
318 | ||
0fa1a53e | 319 | #define inet6_rcv_saddr(__sk) NULL |
8feaf0c0 | 320 | #define tcp_twsk_ipv6only(__sk) 0 |
463c84b9 | 321 | #define inet_v6_ipv6only(__sk) 0 |
dfd56b8b | 322 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
1da177e4 | 323 | |
ce43b03e | 324 | #define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \ |
50805466 | 325 | (((__sk)->sk_portpair == (__ports)) && \ |
ce43b03e | 326 | ((__sk)->sk_family == AF_INET6) && \ |
efe4208f ED |
327 | ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr)) && \ |
328 | ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr)) && \ | |
ce43b03e ED |
329 | (!(__sk)->sk_bound_dev_if || \ |
330 | ((__sk)->sk_bound_dev_if == (__dif))) && \ | |
331 | net_eq(sock_net(__sk), (__net))) | |
332 | ||
8feaf0c0 | 333 | #endif /* _IPV6_H */ |