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 __s32 mldv1_unsolicited_report_interval;
23 __s32 mldv2_unsolicited_report_interval;
24#ifdef CONFIG_IPV6_PRIVACY
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#endif
31 __s32 max_addresses;
32 __s32 accept_ra_defrtr;
33 __s32 accept_ra_pinfo;
34#ifdef CONFIG_IPV6_ROUTER_PREF
35 __s32 accept_ra_rtr_pref;
36 __s32 rtr_probe_interval;
37#ifdef CONFIG_IPV6_ROUTE_INFO
38 __s32 accept_ra_rt_info_max_plen;
39#endif
40#endif
41 __s32 proxy_ndp;
42 __s32 accept_source_route;
43#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
44 __s32 optimistic_dad;
45#endif
46#ifdef CONFIG_IPV6_MROUTE
47 __s32 mc_forwarding;
48#endif
49 __s32 disable_ipv6;
50 __s32 accept_dad;
51 __s32 force_tllao;
52 __s32 ndisc_notify;
53 __s32 suppress_frag_ndisc;
54 void *sysctl;
55};
56
57struct ipv6_params {
58 __s32 disable_ipv6;
59 __s32 autoconf;
60};
61extern struct ipv6_params ipv6_defaults;
62#include <linux/icmpv6.h>
63#include <linux/tcp.h>
64#include <linux/udp.h>
65
66#include <net/inet_sock.h>
67
68static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
69{
70 return (struct ipv6hdr *)skb_network_header(skb);
71}
72
73static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb)
74{
75 return (struct ipv6hdr *)skb_inner_network_header(skb);
76}
77
78static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
79{
80 return (struct ipv6hdr *)skb_transport_header(skb);
81}
82
83
84
85
86
87
88struct inet6_skb_parm {
89 int iif;
90 __be16 ra;
91 __u16 hop;
92 __u16 dst0;
93 __u16 srcrt;
94 __u16 dst1;
95 __u16 lastopt;
96 __u16 nhoff;
97 __u16 flags;
98#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
99 __u16 dsthao;
100#endif
101 __u16 frag_max_size;
102
103#define IP6SKB_XFRM_TRANSFORMED 1
104#define IP6SKB_FORWARDED 2
105#define IP6SKB_REROUTED 4
106#define IP6SKB_ROUTERALERT 8
107#define IP6SKB_FRAGMENTED 16
108};
109
110#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
111#define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
112
113static inline int inet6_iif(const struct sk_buff *skb)
114{
115 return IP6CB(skb)->iif;
116}
117
118struct inet6_request_sock {
119 struct in6_addr loc_addr;
120 struct in6_addr rmt_addr;
121 struct sk_buff *pktopts;
122 int iif;
123};
124
125struct tcp6_request_sock {
126 struct tcp_request_sock tcp6rsk_tcp;
127 struct inet6_request_sock tcp6rsk_inet6;
128};
129
130struct ipv6_mc_socklist;
131struct ipv6_ac_socklist;
132struct ipv6_fl_socklist;
133
134
135
136
137
138
139
140
141
142struct ipv6_pinfo {
143 struct in6_addr saddr;
144 struct in6_addr rcv_saddr;
145 struct in6_addr daddr;
146 struct in6_pktinfo sticky_pktinfo;
147 const struct in6_addr *daddr_cache;
148#ifdef CONFIG_IPV6_SUBTREES
149 const struct in6_addr *saddr_cache;
150#endif
151
152 __be32 flow_label;
153 __u32 frag_size;
154
155
156
157
158
159#if defined(__BIG_ENDIAN_BITFIELD)
160 __s16 hop_limit:9;
161 __u16 __unused_1:7;
162#else
163 __u16 __unused_1:7;
164 __s16 hop_limit:9;
165#endif
166
167#if defined(__BIG_ENDIAN_BITFIELD)
168
169 __s16 mcast_hops:9;
170 __u16 __unused_2:6,
171 mc_loop:1;
172#else
173 __u16 mc_loop:1,
174 __unused_2:6;
175 __s16 mcast_hops:9;
176#endif
177 int ucast_oif;
178 int mcast_oif;
179
180
181 union {
182 struct {
183 __u16 srcrt:1,
184 osrcrt:1,
185 rxinfo:1,
186 rxoinfo:1,
187 rxhlim:1,
188 rxohlim:1,
189 hopopts:1,
190 ohopopts:1,
191 dstopts:1,
192 odstopts:1,
193 rxflow:1,
194 rxtclass:1,
195 rxpmtu:1,
196 rxorigdstaddr:1;
197
198 } bits;
199 __u16 all;
200 } rxopt;
201
202
203 __u16 recverr:1,
204 sndflow:1,
205 pmtudisc:2,
206 ipv6only:1,
207 srcprefs:3,
208
209
210
211 dontfrag:1;
212 __u8 min_hopcount;
213 __u8 tclass;
214 __u8 rcv_tclass;
215
216 __u32 dst_cookie;
217 __u32 rx_dst_cookie;
218
219 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
220 struct ipv6_ac_socklist *ipv6_ac_list;
221 struct ipv6_fl_socklist __rcu *ipv6_fl_list;
222
223 struct ipv6_txoptions *opt;
224 struct sk_buff *pktoptions;
225 struct sk_buff *rxpmtu;
226 struct {
227 struct ipv6_txoptions *opt;
228 u8 hop_limit;
229 u8 tclass;
230 } cork;
231};
232
233
234struct raw6_sock {
235
236 struct inet_sock inet;
237 __u32 checksum;
238 __u32 offset;
239 struct icmp6_filter filter;
240 __u32 ip6mr_table;
241
242 struct ipv6_pinfo inet6;
243};
244
245struct udp6_sock {
246 struct udp_sock udp;
247
248 struct ipv6_pinfo inet6;
249};
250
251struct tcp6_sock {
252 struct tcp_sock tcp;
253
254 struct ipv6_pinfo inet6;
255};
256
257extern int inet6_sk_rebuild_header(struct sock *sk);
258
259struct inet6_timewait_sock {
260 struct in6_addr tw_v6_daddr;
261 struct in6_addr tw_v6_rcv_saddr;
262};
263
264struct tcp6_timewait_sock {
265 struct tcp_timewait_sock tcp6tw_tcp;
266 struct inet6_timewait_sock tcp6tw_inet6;
267};
268
269static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
270{
271 return (struct inet6_timewait_sock *)(((u8 *)sk) +
272 inet_twsk(sk)->tw_ipv6_offset);
273}
274
275#if IS_ENABLED(CONFIG_IPV6)
276static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
277{
278 return inet_sk(__sk)->pinet6;
279}
280
281static inline struct inet6_request_sock *
282 inet6_rsk(const struct request_sock *rsk)
283{
284 return (struct inet6_request_sock *)(((u8 *)rsk) +
285 inet_rsk(rsk)->inet6_rsk_offset);
286}
287
288static inline u32 inet6_rsk_offset(struct request_sock *rsk)
289{
290 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
291}
292
293static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
294{
295 struct request_sock *req = reqsk_alloc(ops);
296
297 if (req != NULL) {
298 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
299 inet6_rsk(req)->pktopts = NULL;
300 }
301
302 return req;
303}
304
305static inline struct raw6_sock *raw6_sk(const struct sock *sk)
306{
307 return (struct raw6_sock *)sk;
308}
309
310static inline void inet_sk_copy_descendant(struct sock *sk_to,
311 const struct sock *sk_from)
312{
313 int ancestor_size = sizeof(struct inet_sock);
314
315 if (sk_from->sk_family == PF_INET6)
316 ancestor_size += sizeof(struct ipv6_pinfo);
317
318 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
319}
320
321#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
322#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
323
324static inline u16 inet6_tw_offset(const struct proto *prot)
325{
326 return prot->twsk_prot->twsk_obj_size -
327 sizeof(struct inet6_timewait_sock);
328}
329
330static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
331{
332 return likely(sk->sk_state != TCP_TIME_WAIT) ?
333 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
334}
335
336static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
337{
338 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
339}
340
341static inline int inet_v6_ipv6only(const struct sock *sk)
342{
343 return likely(sk->sk_state != TCP_TIME_WAIT) ?
344 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
345}
346#else
347#define __ipv6_only_sock(sk) 0
348#define ipv6_only_sock(sk) 0
349
350static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
351{
352 return NULL;
353}
354
355static inline struct inet6_request_sock *
356 inet6_rsk(const struct request_sock *rsk)
357{
358 return NULL;
359}
360
361static inline struct raw6_sock *raw6_sk(const struct sock *sk)
362{
363 return NULL;
364}
365
366#define __inet6_rcv_saddr(__sk) NULL
367#define inet6_rcv_saddr(__sk) NULL
368#define tcp_twsk_ipv6only(__sk) 0
369#define inet_v6_ipv6only(__sk) 0
370#endif
371
372#define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
373 ((inet_sk(__sk)->inet_portpair == (__ports)) && \
374 ((__sk)->sk_family == AF_INET6) && \
375 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
376 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
377 (!(__sk)->sk_bound_dev_if || \
378 ((__sk)->sk_bound_dev_if == (__dif))) && \
379 net_eq(sock_net(__sk), (__net)))
380
381#define INET6_TW_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
382 ((inet_twsk(__sk)->tw_portpair == (__ports)) && \
383 ((__sk)->sk_family == AF_INET6) && \
384 ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr)) && \
385 ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr)) && \
386 (!(__sk)->sk_bound_dev_if || \
387 ((__sk)->sk_bound_dev_if == (__dif))) && \
388 net_eq(sock_net(__sk), (__net)))
389
390#endif
391
