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
10
11struct 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_pinfo;
33#ifdef CONFIG_IPV6_ROUTER_PREF
34 __s32 accept_ra_rtr_pref;
35 __s32 rtr_probe_interval;
36#ifdef CONFIG_IPV6_ROUTE_INFO
37 __s32 accept_ra_rt_info_max_plen;
38#endif
39#endif
40 __s32 proxy_ndp;
41 __s32 accept_source_route;
42#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
43 __s32 optimistic_dad;
44#endif
45#ifdef CONFIG_IPV6_MROUTE
46 __s32 mc_forwarding;
47#endif
48 __s32 disable_ipv6;
49 __s32 accept_dad;
50 __s32 force_tllao;
51 __s32 ndisc_notify;
52 __s32 suppress_frag_ndisc;
53 void *sysctl;
54};
55
56struct ipv6_params {
57 __s32 disable_ipv6;
58 __s32 autoconf;
59};
60extern struct ipv6_params ipv6_defaults;
61#include <linux/icmpv6.h>
62#include <linux/tcp.h>
63#include <linux/udp.h>
64
65#include <net/inet_sock.h>
66
67static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
68{
69 return (struct ipv6hdr *)skb_network_header(skb);
70}
71
72static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb)
73{
74 return (struct ipv6hdr *)skb_inner_network_header(skb);
75}
76
77static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
78{
79 return (struct ipv6hdr *)skb_transport_header(skb);
80}
81
82
83
84
85
86
87struct inet6_skb_parm {
88 int iif;
89 __be16 ra;
90 __u16 hop;
91 __u16 dst0;
92 __u16 srcrt;
93 __u16 dst1;
94 __u16 lastopt;
95 __u16 nhoff;
96 __u16 flags;
97#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
98 __u16 dsthao;
99#endif
100 __u16 frag_max_size;
101
102#define IP6SKB_XFRM_TRANSFORMED 1
103#define IP6SKB_FORWARDED 2
104#define IP6SKB_REROUTED 4
105#define IP6SKB_ROUTERALERT 8
106#define IP6SKB_FRAGMENTED 16
107};
108
109#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
110#define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
111
112static inline int inet6_iif(const struct sk_buff *skb)
113{
114 return IP6CB(skb)->iif;
115}
116
117struct tcp6_request_sock {
118 struct tcp_request_sock tcp6rsk_tcp;
119};
120
121struct ipv6_mc_socklist;
122struct ipv6_ac_socklist;
123struct ipv6_fl_socklist;
124
125
126
127
128
129
130
131
132
133struct ipv6_pinfo {
134 struct in6_addr saddr;
135 struct in6_pktinfo sticky_pktinfo;
136 const struct in6_addr *daddr_cache;
137#ifdef CONFIG_IPV6_SUBTREES
138 const struct in6_addr *saddr_cache;
139#endif
140
141 __be32 flow_label;
142 __u32 frag_size;
143
144
145
146
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
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
166 int ucast_oif;
167 int mcast_oif;
168
169
170 union {
171 struct {
172 __u16 srcrt:1,
173 osrcrt:1,
174 rxinfo:1,
175 rxoinfo:1,
176 rxhlim:1,
177 rxohlim:1,
178 hopopts:1,
179 ohopopts:1,
180 dstopts:1,
181 odstopts:1,
182 rxflow:1,
183 rxtclass:1,
184 rxpmtu:1,
185 rxorigdstaddr:1;
186
187 } bits;
188 __u16 all;
189 } rxopt;
190
191
192 __u16 recverr:1,
193 sndflow:1,
194 repflow:1,
195 pmtudisc:3,
196 ipv6only:1,
197 srcprefs:3,
198
199
200
201 dontfrag:1;
202 __u8 min_hopcount;
203 __u8 tclass;
204 __be32 rcv_flowinfo;
205
206 __u32 dst_cookie;
207 __u32 rx_dst_cookie;
208
209 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
210 struct ipv6_ac_socklist *ipv6_ac_list;
211 struct ipv6_fl_socklist __rcu *ipv6_fl_list;
212
213 struct ipv6_txoptions *opt;
214 struct sk_buff *pktoptions;
215 struct sk_buff *rxpmtu;
216 struct {
217 struct ipv6_txoptions *opt;
218 u8 hop_limit;
219 u8 tclass;
220 } cork;
221};
222
223
224struct raw6_sock {
225
226 struct inet_sock inet;
227 __u32 checksum;
228 __u32 offset;
229 struct icmp6_filter filter;
230 __u32 ip6mr_table;
231
232 struct ipv6_pinfo inet6;
233};
234
235struct udp6_sock {
236 struct udp_sock udp;
237
238 struct ipv6_pinfo inet6;
239};
240
241struct tcp6_sock {
242 struct tcp_sock tcp;
243
244 struct ipv6_pinfo inet6;
245};
246
247extern int inet6_sk_rebuild_header(struct sock *sk);
248
249struct tcp6_timewait_sock {
250 struct tcp_timewait_sock tcp6tw_tcp;
251};
252
253#if IS_ENABLED(CONFIG_IPV6)
254static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
255{
256 return inet_sk(__sk)->pinet6;
257}
258
259static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
260{
261 struct request_sock *req = reqsk_alloc(ops);
262
263 if (req)
264 inet_rsk(req)->pktopts = NULL;
265
266 return req;
267}
268
269static inline struct raw6_sock *raw6_sk(const struct sock *sk)
270{
271 return (struct raw6_sock *)sk;
272}
273
274static inline void inet_sk_copy_descendant(struct sock *sk_to,
275 const struct sock *sk_from)
276{
277 int ancestor_size = sizeof(struct inet_sock);
278
279 if (sk_from->sk_family == PF_INET6)
280 ancestor_size += sizeof(struct ipv6_pinfo);
281
282 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
283}
284
285#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
286#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
287#define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \
288 inet6_sk(sk)->rxopt.bits.rxinfo)
289
290static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
291{
292 if (sk->sk_family == AF_INET6)
293 return &sk->sk_v6_rcv_saddr;
294 return NULL;
295}
296
297static inline int inet_v6_ipv6only(const struct sock *sk)
298{
299 return likely(sk->sk_state != TCP_TIME_WAIT) ?
300 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
301}
302#else
303#define __ipv6_only_sock(sk) 0
304#define ipv6_only_sock(sk) 0
305#define ipv6_sk_rxinfo(sk) 0
306
307static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
308{
309 return NULL;
310}
311
312static inline struct inet6_request_sock *
313 inet6_rsk(const struct request_sock *rsk)
314{
315 return NULL;
316}
317
318static inline struct raw6_sock *raw6_sk(const struct sock *sk)
319{
320 return NULL;
321}
322
323#define inet6_rcv_saddr(__sk) NULL
324#define tcp_twsk_ipv6only(__sk) 0
325#define inet_v6_ipv6only(__sk) 0
326#endif
327
328#define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
329 (((__sk)->sk_portpair == (__ports)) && \
330 ((__sk)->sk_family == AF_INET6) && \
331 ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr)) && \
332 ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr)) && \
333 (!(__sk)->sk_bound_dev_if || \
334 ((__sk)->sk_bound_dev_if == (__dif))) && \
335 net_eq(sock_net(__sk), (__net)))
336
337#endif
338
