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#define IP6SKB_FRAGMENTED 16
105};
106
107#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
108#define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
109
110static inline int inet6_iif(const struct sk_buff *skb)
111{
112 return IP6CB(skb)->iif;
113}
114
115struct inet6_request_sock {
116 struct in6_addr loc_addr;
117 struct in6_addr rmt_addr;
118 struct sk_buff *pktopts;
119 int iif;
120};
121
122struct tcp6_request_sock {
123 struct tcp_request_sock tcp6rsk_tcp;
124 struct inet6_request_sock tcp6rsk_inet6;
125};
126
127struct ipv6_mc_socklist;
128struct ipv6_ac_socklist;
129struct ipv6_fl_socklist;
130
131
132
133
134
135
136
137
138
139struct ipv6_pinfo {
140 struct in6_addr saddr;
141 struct in6_addr rcv_saddr;
142 struct in6_addr daddr;
143 struct in6_pktinfo sticky_pktinfo;
144 const struct in6_addr *daddr_cache;
145#ifdef CONFIG_IPV6_SUBTREES
146 const struct in6_addr *saddr_cache;
147#endif
148
149 __be32 flow_label;
150 __u32 frag_size;
151
152
153
154
155
156#if defined(__BIG_ENDIAN_BITFIELD)
157 __s16 hop_limit:9;
158 __u16 __unused_1:7;
159#else
160 __u16 __unused_1:7;
161 __s16 hop_limit:9;
162#endif
163
164#if defined(__BIG_ENDIAN_BITFIELD)
165
166 __s16 mcast_hops:9;
167 __u16 __unused_2:6,
168 mc_loop:1;
169#else
170 __u16 mc_loop:1,
171 __unused_2:6;
172 __s16 mcast_hops:9;
173#endif
174 int ucast_oif;
175 int mcast_oif;
176
177
178 union {
179 struct {
180 __u16 srcrt:1,
181 osrcrt:1,
182 rxinfo:1,
183 rxoinfo:1,
184 rxhlim:1,
185 rxohlim:1,
186 hopopts:1,
187 ohopopts:1,
188 dstopts:1,
189 odstopts:1,
190 rxflow:1,
191 rxtclass:1,
192 rxpmtu:1,
193 rxorigdstaddr:1;
194
195 } bits;
196 __u16 all;
197 } rxopt;
198
199
200 __u16 recverr:1,
201 sndflow:1,
202 pmtudisc:2,
203 ipv6only:1,
204 srcprefs:3,
205
206
207
208 dontfrag:1;
209 __u8 min_hopcount;
210 __u8 tclass;
211 __u8 rcv_tclass;
212
213 __u32 dst_cookie;
214 __u32 rx_dst_cookie;
215
216 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
217 struct ipv6_ac_socklist *ipv6_ac_list;
218 struct ipv6_fl_socklist __rcu *ipv6_fl_list;
219
220 struct ipv6_txoptions *opt;
221 struct sk_buff *pktoptions;
222 struct sk_buff *rxpmtu;
223 struct {
224 struct ipv6_txoptions *opt;
225 u8 hop_limit;
226 u8 tclass;
227 } cork;
228};
229
230
231struct raw6_sock {
232
233 struct inet_sock inet;
234 __u32 checksum;
235 __u32 offset;
236 struct icmp6_filter filter;
237 __u32 ip6mr_table;
238
239 struct ipv6_pinfo inet6;
240};
241
242struct udp6_sock {
243 struct udp_sock udp;
244
245 struct ipv6_pinfo inet6;
246};
247
248struct tcp6_sock {
249 struct tcp_sock tcp;
250
251 struct ipv6_pinfo inet6;
252};
253
254extern int inet6_sk_rebuild_header(struct sock *sk);
255
256struct inet6_timewait_sock {
257 struct in6_addr tw_v6_daddr;
258 struct in6_addr tw_v6_rcv_saddr;
259};
260
261struct tcp6_timewait_sock {
262 struct tcp_timewait_sock tcp6tw_tcp;
263 struct inet6_timewait_sock tcp6tw_inet6;
264};
265
266static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
267{
268 return (struct inet6_timewait_sock *)(((u8 *)sk) +
269 inet_twsk(sk)->tw_ipv6_offset);
270}
271
272#if IS_ENABLED(CONFIG_IPV6)
273static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
274{
275 return inet_sk(__sk)->pinet6;
276}
277
278static inline struct inet6_request_sock *
279 inet6_rsk(const struct request_sock *rsk)
280{
281 return (struct inet6_request_sock *)(((u8 *)rsk) +
282 inet_rsk(rsk)->inet6_rsk_offset);
283}
284
285static inline u32 inet6_rsk_offset(struct request_sock *rsk)
286{
287 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
288}
289
290static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
291{
292 struct request_sock *req = reqsk_alloc(ops);
293
294 if (req != NULL) {
295 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
296 inet6_rsk(req)->pktopts = NULL;
297 }
298
299 return req;
300}
301
302static inline struct raw6_sock *raw6_sk(const struct sock *sk)
303{
304 return (struct raw6_sock *)sk;
305}
306
307static inline void inet_sk_copy_descendant(struct sock *sk_to,
308 const struct sock *sk_from)
309{
310 int ancestor_size = sizeof(struct inet_sock);
311
312 if (sk_from->sk_family == PF_INET6)
313 ancestor_size += sizeof(struct ipv6_pinfo);
314
315 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
316}
317
318#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
319#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
320
321static inline u16 inet6_tw_offset(const struct proto *prot)
322{
323 return prot->twsk_prot->twsk_obj_size -
324 sizeof(struct inet6_timewait_sock);
325}
326
327static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
328{
329 return likely(sk->sk_state != TCP_TIME_WAIT) ?
330 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
331}
332
333static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
334{
335 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
336}
337
338static inline int inet_v6_ipv6only(const struct sock *sk)
339{
340 return likely(sk->sk_state != TCP_TIME_WAIT) ?
341 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
342}
343#else
344#define __ipv6_only_sock(sk) 0
345#define ipv6_only_sock(sk) 0
346
347static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
348{
349 return NULL;
350}
351
352static inline struct inet6_request_sock *
353 inet6_rsk(const struct request_sock *rsk)
354{
355 return NULL;
356}
357
358static inline struct raw6_sock *raw6_sk(const struct sock *sk)
359{
360 return NULL;
361}
362
363#define __inet6_rcv_saddr(__sk) NULL
364#define inet6_rcv_saddr(__sk) NULL
365#define tcp_twsk_ipv6only(__sk) 0
366#define inet_v6_ipv6only(__sk) 0
367#endif
368
369#define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
370 ((inet_sk(__sk)->inet_portpair == (__ports)) && \
371 ((__sk)->sk_family == AF_INET6) && \
372 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
373 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
374 (!(__sk)->sk_bound_dev_if || \
375 ((__sk)->sk_bound_dev_if == (__dif))) && \
376 net_eq(sock_net(__sk), (__net)))
377
378#define INET6_TW_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
379 ((inet_twsk(__sk)->tw_portpair == (__ports)) && \
380 ((__sk)->sk_family == AF_INET6) && \
381 ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr)) && \
382 ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr)) && \
383 (!(__sk)->sk_bound_dev_if || \
384 ((__sk)->sk_bound_dev_if == (__dif))) && \
385 net_eq(sock_net(__sk), (__net)))
386
387#endif
388
