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
8
9
10struct ipv6_devconf {
11 __s32 forwarding;
12 __s32 hop_limit;
13 __s32 mtu6;
14 __s32 accept_ra;
15 __s32 accept_redirects;
16 __s32 autoconf;
17 __s32 dad_transmits;
18 __s32 rtr_solicits;
19 __s32 rtr_solicit_interval;
20 __s32 rtr_solicit_delay;
21 __s32 force_mld_version;
22#ifdef CONFIG_IPV6_PRIVACY
23 __s32 use_tempaddr;
24 __s32 temp_valid_lft;
25 __s32 temp_prefered_lft;
26 __s32 regen_max_retry;
27 __s32 max_desync_factor;
28#endif
29 __s32 max_addresses;
30 __s32 accept_ra_defrtr;
31 __s32 accept_ra_pinfo;
32#ifdef CONFIG_IPV6_ROUTER_PREF
33 __s32 accept_ra_rtr_pref;
34 __s32 rtr_probe_interval;
35#ifdef CONFIG_IPV6_ROUTE_INFO
36 __s32 accept_ra_rt_info_max_plen;
37#endif
38#endif
39 __s32 proxy_ndp;
40 __s32 accept_source_route;
41#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
42 __s32 optimistic_dad;
43#endif
44#ifdef CONFIG_IPV6_MROUTE
45 __s32 mc_forwarding;
46#endif
47 __s32 disable_ipv6;
48 __s32 accept_dad;
49 __s32 force_tllao;
50 __s32 ndisc_notify;
51 void *sysctl;
52};
53
54struct ipv6_params {
55 __s32 disable_ipv6;
56 __s32 autoconf;
57};
58extern struct ipv6_params ipv6_defaults;
59#include <linux/icmpv6.h>
60#include <linux/tcp.h>
61#include <linux/udp.h>
62
63#include <net/inet_sock.h>
64
65static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
66{
67 return (struct ipv6hdr *)skb_network_header(skb);
68}
69
70static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb)
71{
72 return (struct ipv6hdr *)skb_inner_network_header(skb);
73}
74
75static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
76{
77 return (struct ipv6hdr *)skb_transport_header(skb);
78}
79
80
81
82
83
84
85struct inet6_skb_parm {
86 int iif;
87 __be16 ra;
88 __u16 hop;
89 __u16 dst0;
90 __u16 srcrt;
91 __u16 dst1;
92 __u16 lastopt;
93 __u16 nhoff;
94 __u16 flags;
95#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
96 __u16 dsthao;
97#endif
98 __u16 frag_max_size;
99
100#define IP6SKB_XFRM_TRANSFORMED 1
101#define IP6SKB_FORWARDED 2
102#define IP6SKB_REROUTED 4
103#define IP6SKB_ROUTERALERT 8
104};
105
106#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
107#define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
108
109static inline int inet6_iif(const struct sk_buff *skb)
110{
111 return IP6CB(skb)->iif;
112}
113
114struct inet6_request_sock {
115 struct in6_addr loc_addr;
116 struct in6_addr rmt_addr;
117 struct sk_buff *pktopts;
118 int iif;
119};
120
121struct tcp6_request_sock {
122 struct tcp_request_sock tcp6rsk_tcp;
123 struct inet6_request_sock tcp6rsk_inet6;
124};
125
126struct ipv6_mc_socklist;
127struct ipv6_ac_socklist;
128struct ipv6_fl_socklist;
129
130
131
132
133
134
135
136
137
138struct ipv6_pinfo {
139 struct in6_addr saddr;
140 struct in6_addr rcv_saddr;
141 struct in6_addr daddr;
142 struct in6_pktinfo sticky_pktinfo;
143 const struct in6_addr *daddr_cache;
144#ifdef CONFIG_IPV6_SUBTREES
145 const struct in6_addr *saddr_cache;
146#endif
147
148 __be32 flow_label;
149 __u32 frag_size;
150
151
152
153
154
155#if defined(__BIG_ENDIAN_BITFIELD)
156 __s16 hop_limit:9;
157 __u16 __unused_1:7;
158#else
159 __u16 __unused_1:7;
160 __s16 hop_limit:9;
161#endif
162
163#if defined(__BIG_ENDIAN_BITFIELD)
164
165 __s16 mcast_hops:9;
166 __u16 __unused_2:6,
167 mc_loop:1;
168#else
169 __u16 mc_loop:1,
170 __unused_2:6;
171 __s16 mcast_hops:9;
172#endif
173 int ucast_oif;
174 int mcast_oif;
175
176
177 union {
178 struct {
179 __u16 srcrt:1,
180 osrcrt:1,
181 rxinfo:1,
182 rxoinfo:1,
183 rxhlim:1,
184 rxohlim:1,
185 hopopts:1,
186 ohopopts:1,
187 dstopts:1,
188 odstopts:1,
189 rxflow:1,
190 rxtclass:1,
191 rxpmtu:1,
192 rxorigdstaddr:1;
193
194 } bits;
195 __u16 all;
196 } rxopt;
197
198
199 __u16 recverr:1,
200 sndflow:1,
201 pmtudisc:2,
202 ipv6only:1,
203 srcprefs:3,
204
205
206
207 dontfrag:1;
208 __u8 min_hopcount;
209 __u8 tclass;
210 __u8 rcv_tclass;
211
212 __u32 dst_cookie;
213 __u32 rx_dst_cookie;
214
215 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
216 struct ipv6_ac_socklist *ipv6_ac_list;
217 struct ipv6_fl_socklist __rcu *ipv6_fl_list;
218
219 struct ipv6_txoptions *opt;
220 struct sk_buff *pktoptions;
221 struct sk_buff *rxpmtu;
222 struct {
223 struct ipv6_txoptions *opt;
224 u8 hop_limit;
225 u8 tclass;
226 } cork;
227};
228
229
230struct raw6_sock {
231
232 struct inet_sock inet;
233 __u32 checksum;
234 __u32 offset;
235 struct icmp6_filter filter;
236 __u32 ip6mr_table;
237
238 struct ipv6_pinfo inet6;
239};
240
241struct udp6_sock {
242 struct udp_sock udp;
243
244 struct ipv6_pinfo inet6;
245};
246
247struct tcp6_sock {
248 struct tcp_sock tcp;
249
250 struct ipv6_pinfo inet6;
251};
252
253extern int inet6_sk_rebuild_header(struct sock *sk);
254
255struct inet6_timewait_sock {
256 struct in6_addr tw_v6_daddr;
257 struct in6_addr tw_v6_rcv_saddr;
258};
259
260struct tcp6_timewait_sock {
261 struct tcp_timewait_sock tcp6tw_tcp;
262 struct inet6_timewait_sock tcp6tw_inet6;
263};
264
265static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
266{
267 return (struct inet6_timewait_sock *)(((u8 *)sk) +
268 inet_twsk(sk)->tw_ipv6_offset);
269}
270
271#if IS_ENABLED(CONFIG_IPV6)
272static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
273{
274 return inet_sk(__sk)->pinet6;
275}
276
277static inline struct inet6_request_sock *
278 inet6_rsk(const struct request_sock *rsk)
279{
280 return (struct inet6_request_sock *)(((u8 *)rsk) +
281 inet_rsk(rsk)->inet6_rsk_offset);
282}
283
284static inline u32 inet6_rsk_offset(struct request_sock *rsk)
285{
286 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
287}
288
289static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
290{
291 struct request_sock *req = reqsk_alloc(ops);
292
293 if (req != NULL) {
294 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
295 inet6_rsk(req)->pktopts = NULL;
296 }
297
298 return req;
299}
300
301static inline struct raw6_sock *raw6_sk(const struct sock *sk)
302{
303 return (struct raw6_sock *)sk;
304}
305
306static inline void inet_sk_copy_descendant(struct sock *sk_to,
307 const struct sock *sk_from)
308{
309 int ancestor_size = sizeof(struct inet_sock);
310
311 if (sk_from->sk_family == PF_INET6)
312 ancestor_size += sizeof(struct ipv6_pinfo);
313
314 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
315}
316
317#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
318#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
319
320static inline u16 inet6_tw_offset(const struct proto *prot)
321{
322 return prot->twsk_prot->twsk_obj_size -
323 sizeof(struct inet6_timewait_sock);
324}
325
326static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
327{
328 return likely(sk->sk_state != TCP_TIME_WAIT) ?
329 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
330}
331
332static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
333{
334 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
335}
336
337static inline int inet_v6_ipv6only(const struct sock *sk)
338{
339 return likely(sk->sk_state != TCP_TIME_WAIT) ?
340 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
341}
342#else
343#define __ipv6_only_sock(sk) 0
344#define ipv6_only_sock(sk) 0
345
346static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
347{
348 return NULL;
349}
350
351static inline struct inet6_request_sock *
352 inet6_rsk(const struct request_sock *rsk)
353{
354 return NULL;
355}
356
357static inline struct raw6_sock *raw6_sk(const struct sock *sk)
358{
359 return NULL;
360}
361
362#define __inet6_rcv_saddr(__sk) NULL
363#define inet6_rcv_saddr(__sk) NULL
364#define tcp_twsk_ipv6only(__sk) 0
365#define inet_v6_ipv6only(__sk) 0
366#endif
367
368#define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
369 ((inet_sk(__sk)->inet_portpair == (__ports)) && \
370 ((__sk)->sk_family == AF_INET6) && \
371 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
372 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
373 (!(__sk)->sk_bound_dev_if || \
374 ((__sk)->sk_bound_dev_if == (__dif))) && \
375 net_eq(sock_net(__sk), (__net)))
376
377#define INET6_TW_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
378 ((inet_twsk(__sk)->tw_portpair == (__ports)) && \
379 ((__sk)->sk_family == AF_INET6) && \
380 ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr)) && \
381 ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr)) && \
382 (!(__sk)->sk_bound_dev_if || \
383 ((__sk)->sk_bound_dev_if == (__dif))) && \
384 net_eq(sock_net(__sk), (__net)))
385
386#endif
387
