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1 | #ifndef _IPV6_H | |
2 | #define _IPV6_H | |
3 | ||
4 | #include <uapi/linux/ipv6.h> | |
5 | ||
6 | #define ipv6_optlen(p) (((p)->hdrlen+1) << 3) | |
7 | #define ipv6_authlen(p) (((p)->hdrlen+2) << 2) | |
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; | |
23 | __s32 mldv1_unsolicited_report_interval; | |
24 | __s32 mldv2_unsolicited_report_interval; | |
25 | __s32 use_tempaddr; | |
26 | __s32 temp_valid_lft; | |
27 | __s32 temp_prefered_lft; | |
28 | __s32 regen_max_retry; | |
29 | __s32 max_desync_factor; | |
30 | __s32 max_addresses; | |
31 | __s32 accept_ra_defrtr; | |
32 | __s32 accept_ra_min_hop_limit; | |
33 | __s32 accept_ra_pinfo; | |
34 | __s32 ignore_routes_with_linkdown; | |
35 | #ifdef CONFIG_IPV6_ROUTER_PREF | |
36 | __s32 accept_ra_rtr_pref; | |
37 | __s32 rtr_probe_interval; | |
38 | #ifdef CONFIG_IPV6_ROUTE_INFO | |
39 | __s32 accept_ra_rt_info_max_plen; | |
40 | #endif | |
41 | #endif | |
42 | __s32 proxy_ndp; | |
43 | __s32 accept_source_route; | |
44 | __s32 accept_ra_from_local; | |
45 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD | |
46 | __s32 optimistic_dad; | |
47 | __s32 use_optimistic; | |
48 | #endif | |
49 | #ifdef CONFIG_IPV6_MROUTE | |
50 | __s32 mc_forwarding; | |
51 | #endif | |
52 | __s32 disable_ipv6; | |
53 | __s32 drop_unicast_in_l2_multicast; | |
54 | __s32 accept_dad; | |
55 | __s32 force_tllao; | |
56 | __s32 ndisc_notify; | |
57 | __s32 suppress_frag_ndisc; | |
58 | __s32 accept_ra_mtu; | |
59 | __s32 drop_unsolicited_na; | |
60 | struct ipv6_stable_secret { | |
61 | bool initialized; | |
62 | struct in6_addr secret; | |
63 | } stable_secret; | |
64 | __s32 use_oif_addrs_only; | |
65 | __s32 keep_addr_on_down; | |
66 | ||
67 | struct ctl_table_header *sysctl_header; | |
68 | }; | |
69 | ||
70 | struct ipv6_params { | |
71 | __s32 disable_ipv6; | |
72 | __s32 autoconf; | |
73 | }; | |
74 | extern struct ipv6_params ipv6_defaults; | |
75 | #include <linux/icmpv6.h> | |
76 | #include <linux/tcp.h> | |
77 | #include <linux/udp.h> | |
78 | ||
79 | #include <net/inet_sock.h> | |
80 | ||
81 | static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) | |
82 | { | |
83 | return (struct ipv6hdr *)skb_network_header(skb); | |
84 | } | |
85 | ||
86 | static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb) | |
87 | { | |
88 | return (struct ipv6hdr *)skb_inner_network_header(skb); | |
89 | } | |
90 | ||
91 | static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb) | |
92 | { | |
93 | return (struct ipv6hdr *)skb_transport_header(skb); | |
94 | } | |
95 | ||
96 | /* | |
97 | This structure contains results of exthdrs parsing | |
98 | as offsets from skb->nh. | |
99 | */ | |
100 | ||
101 | struct inet6_skb_parm { | |
102 | int iif; | |
103 | __be16 ra; | |
104 | __u16 dst0; | |
105 | __u16 srcrt; | |
106 | __u16 dst1; | |
107 | __u16 lastopt; | |
108 | __u16 nhoff; | |
109 | __u16 flags; | |
110 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) | |
111 | __u16 dsthao; | |
112 | #endif | |
113 | __u16 frag_max_size; | |
114 | ||
115 | #define IP6SKB_XFRM_TRANSFORMED 1 | |
116 | #define IP6SKB_FORWARDED 2 | |
117 | #define IP6SKB_REROUTED 4 | |
118 | #define IP6SKB_ROUTERALERT 8 | |
119 | #define IP6SKB_FRAGMENTED 16 | |
120 | #define IP6SKB_HOPBYHOP 32 | |
121 | #define IP6SKB_L3SLAVE 64 | |
122 | }; | |
123 | ||
124 | #if defined(CONFIG_NET_L3_MASTER_DEV) | |
125 | static inline bool skb_l3mdev_slave(__u16 flags) | |
126 | { | |
127 | return flags & IP6SKB_L3SLAVE; | |
128 | } | |
129 | #else | |
130 | static inline bool skb_l3mdev_slave(__u16 flags) | |
131 | { | |
132 | return false; | |
133 | } | |
134 | #endif | |
135 | ||
136 | #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) | |
137 | #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb)) | |
138 | ||
139 | static inline int inet6_iif(const struct sk_buff *skb) | |
140 | { | |
141 | bool l3_slave = skb_l3mdev_slave(IP6CB(skb)->flags); | |
142 | ||
143 | return l3_slave ? skb->skb_iif : IP6CB(skb)->iif; | |
144 | } | |
145 | ||
146 | struct tcp6_request_sock { | |
147 | struct tcp_request_sock tcp6rsk_tcp; | |
148 | }; | |
149 | ||
150 | struct ipv6_mc_socklist; | |
151 | struct ipv6_ac_socklist; | |
152 | struct ipv6_fl_socklist; | |
153 | ||
154 | struct inet6_cork { | |
155 | struct ipv6_txoptions *opt; | |
156 | u8 hop_limit; | |
157 | u8 tclass; | |
158 | }; | |
159 | ||
160 | /** | |
161 | * struct ipv6_pinfo - ipv6 private area | |
162 | * | |
163 | * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc) | |
164 | * this _must_ be the last member, so that inet6_sk_generic | |
165 | * is able to calculate its offset from the base struct sock | |
166 | * by using the struct proto->slab_obj_size member. -acme | |
167 | */ | |
168 | struct ipv6_pinfo { | |
169 | struct in6_addr saddr; | |
170 | struct in6_pktinfo sticky_pktinfo; | |
171 | const struct in6_addr *daddr_cache; | |
172 | #ifdef CONFIG_IPV6_SUBTREES | |
173 | const struct in6_addr *saddr_cache; | |
174 | #endif | |
175 | ||
176 | __be32 flow_label; | |
177 | __u32 frag_size; | |
178 | ||
179 | /* | |
180 | * Packed in 16bits. | |
181 | * Omit one shift by by putting the signed field at MSB. | |
182 | */ | |
183 | #if defined(__BIG_ENDIAN_BITFIELD) | |
184 | __s16 hop_limit:9; | |
185 | __u16 __unused_1:7; | |
186 | #else | |
187 | __u16 __unused_1:7; | |
188 | __s16 hop_limit:9; | |
189 | #endif | |
190 | ||
191 | #if defined(__BIG_ENDIAN_BITFIELD) | |
192 | /* Packed in 16bits. */ | |
193 | __s16 mcast_hops:9; | |
194 | __u16 __unused_2:6, | |
195 | mc_loop:1; | |
196 | #else | |
197 | __u16 mc_loop:1, | |
198 | __unused_2:6; | |
199 | __s16 mcast_hops:9; | |
200 | #endif | |
201 | int ucast_oif; | |
202 | int mcast_oif; | |
203 | ||
204 | /* pktoption flags */ | |
205 | union { | |
206 | struct { | |
207 | __u16 srcrt:1, | |
208 | osrcrt:1, | |
209 | rxinfo:1, | |
210 | rxoinfo:1, | |
211 | rxhlim:1, | |
212 | rxohlim:1, | |
213 | hopopts:1, | |
214 | ohopopts:1, | |
215 | dstopts:1, | |
216 | odstopts:1, | |
217 | rxflow:1, | |
218 | rxtclass:1, | |
219 | rxpmtu:1, | |
220 | rxorigdstaddr:1; | |
221 | /* 2 bits hole */ | |
222 | } bits; | |
223 | __u16 all; | |
224 | } rxopt; | |
225 | ||
226 | /* sockopt flags */ | |
227 | __u16 recverr:1, | |
228 | sndflow:1, | |
229 | repflow:1, | |
230 | pmtudisc:3, | |
231 | padding:1, /* 1 bit hole */ | |
232 | srcprefs:3, /* 001: prefer temporary address | |
233 | * 010: prefer public address | |
234 | * 100: prefer care-of address | |
235 | */ | |
236 | dontfrag:1, | |
237 | autoflowlabel:1; | |
238 | __u8 min_hopcount; | |
239 | __u8 tclass; | |
240 | __be32 rcv_flowinfo; | |
241 | ||
242 | __u32 dst_cookie; | |
243 | __u32 rx_dst_cookie; | |
244 | ||
245 | struct ipv6_mc_socklist __rcu *ipv6_mc_list; | |
246 | struct ipv6_ac_socklist *ipv6_ac_list; | |
247 | struct ipv6_fl_socklist __rcu *ipv6_fl_list; | |
248 | ||
249 | struct ipv6_txoptions __rcu *opt; | |
250 | struct sk_buff *pktoptions; | |
251 | struct sk_buff *rxpmtu; | |
252 | struct inet6_cork cork; | |
253 | }; | |
254 | ||
255 | /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ | |
256 | struct raw6_sock { | |
257 | /* inet_sock has to be the first member of raw6_sock */ | |
258 | struct inet_sock inet; | |
259 | __u32 checksum; /* perform checksum */ | |
260 | __u32 offset; /* checksum offset */ | |
261 | struct icmp6_filter filter; | |
262 | __u32 ip6mr_table; | |
263 | /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */ | |
264 | struct ipv6_pinfo inet6; | |
265 | }; | |
266 | ||
267 | struct udp6_sock { | |
268 | struct udp_sock udp; | |
269 | /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */ | |
270 | struct ipv6_pinfo inet6; | |
271 | }; | |
272 | ||
273 | struct tcp6_sock { | |
274 | struct tcp_sock tcp; | |
275 | /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */ | |
276 | struct ipv6_pinfo inet6; | |
277 | }; | |
278 | ||
279 | extern int inet6_sk_rebuild_header(struct sock *sk); | |
280 | ||
281 | struct tcp6_timewait_sock { | |
282 | struct tcp_timewait_sock tcp6tw_tcp; | |
283 | }; | |
284 | ||
285 | #if IS_ENABLED(CONFIG_IPV6) | |
286 | static inline struct ipv6_pinfo *inet6_sk(const struct sock *__sk) | |
287 | { | |
288 | return sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL; | |
289 | } | |
290 | ||
291 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) | |
292 | { | |
293 | return (struct raw6_sock *)sk; | |
294 | } | |
295 | ||
296 | static inline void inet_sk_copy_descendant(struct sock *sk_to, | |
297 | const struct sock *sk_from) | |
298 | { | |
299 | int ancestor_size = sizeof(struct inet_sock); | |
300 | ||
301 | if (sk_from->sk_family == PF_INET6) | |
302 | ancestor_size += sizeof(struct ipv6_pinfo); | |
303 | ||
304 | __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size); | |
305 | } | |
306 | ||
307 | #define __ipv6_only_sock(sk) (sk->sk_ipv6only) | |
308 | #define ipv6_only_sock(sk) (__ipv6_only_sock(sk)) | |
309 | #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \ | |
310 | inet6_sk(sk)->rxopt.bits.rxinfo) | |
311 | ||
312 | static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk) | |
313 | { | |
314 | if (sk->sk_family == AF_INET6) | |
315 | return &sk->sk_v6_rcv_saddr; | |
316 | return NULL; | |
317 | } | |
318 | ||
319 | static inline int inet_v6_ipv6only(const struct sock *sk) | |
320 | { | |
321 | /* ipv6only field is at same position for timewait and other sockets */ | |
322 | return ipv6_only_sock(sk); | |
323 | } | |
324 | #else | |
325 | #define __ipv6_only_sock(sk) 0 | |
326 | #define ipv6_only_sock(sk) 0 | |
327 | #define ipv6_sk_rxinfo(sk) 0 | |
328 | ||
329 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) | |
330 | { | |
331 | return NULL; | |
332 | } | |
333 | ||
334 | static inline struct inet6_request_sock * | |
335 | inet6_rsk(const struct request_sock *rsk) | |
336 | { | |
337 | return NULL; | |
338 | } | |
339 | ||
340 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) | |
341 | { | |
342 | return NULL; | |
343 | } | |
344 | ||
345 | #define inet6_rcv_saddr(__sk) NULL | |
346 | #define tcp_twsk_ipv6only(__sk) 0 | |
347 | #define inet_v6_ipv6only(__sk) 0 | |
348 | #endif /* IS_ENABLED(CONFIG_IPV6) */ | |
349 | #endif /* _IPV6_H */ |