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 __s32 accept_ra_from_local;
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 tcp6_request_sock {
119 struct tcp_request_sock tcp6rsk_tcp;
120};
121
122struct ipv6_mc_socklist;
123struct ipv6_ac_socklist;
124struct ipv6_fl_socklist;
125
126
127
128
129
130
131
132
133
134struct ipv6_pinfo {
135 struct in6_addr saddr;
136 struct in6_pktinfo sticky_pktinfo;
137 const struct in6_addr *daddr_cache;
138#ifdef CONFIG_IPV6_SUBTREES
139 const struct in6_addr *saddr_cache;
140#endif
141
142 __be32 flow_label;
143 __u32 frag_size;
144
145
146
147
148
149#if defined(__BIG_ENDIAN_BITFIELD)
150 __s16 hop_limit:9;
151 __u16 __unused_1:7;
152#else
153 __u16 __unused_1:7;
154 __s16 hop_limit:9;
155#endif
156
157#if defined(__BIG_ENDIAN_BITFIELD)
158
159 __s16 mcast_hops:9;
160 __u16 __unused_2:6,
161 mc_loop:1;
162#else
163 __u16 mc_loop:1,
164 __unused_2:6;
165 __s16 mcast_hops:9;
166#endif
167 int ucast_oif;
168 int mcast_oif;
169
170
171 union {
172 struct {
173 __u16 srcrt:1,
174 osrcrt:1,
175 rxinfo:1,
176 rxoinfo:1,
177 rxhlim:1,
178 rxohlim:1,
179 hopopts:1,
180 ohopopts:1,
181 dstopts:1,
182 odstopts:1,
183 rxflow:1,
184 rxtclass:1,
185 rxpmtu:1,
186 rxorigdstaddr:1;
187
188 } bits;
189 __u16 all;
190 } rxopt;
191
192
193 __u16 recverr:1,
194 sndflow:1,
195 repflow:1,
196 pmtudisc:3,
197 padding:1,
198 srcprefs:3,
199
200
201
202 dontfrag:1,
203 autoflowlabel:1;
204 __u8 min_hopcount;
205 __u8 tclass;
206 __be32 rcv_flowinfo;
207
208 __u32 dst_cookie;
209 __u32 rx_dst_cookie;
210
211 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
212 struct ipv6_ac_socklist *ipv6_ac_list;
213 struct ipv6_fl_socklist __rcu *ipv6_fl_list;
214
215 struct ipv6_txoptions *opt;
216 struct sk_buff *pktoptions;
217 struct sk_buff *rxpmtu;
218 struct {
219 struct ipv6_txoptions *opt;
220 u8 hop_limit;
221 u8 tclass;
222 } cork;
223};
224
225
226struct raw6_sock {
227
228 struct inet_sock inet;
229 __u32 checksum;
230 __u32 offset;
231 struct icmp6_filter filter;
232 __u32 ip6mr_table;
233
234 struct ipv6_pinfo inet6;
235};
236
237struct udp6_sock {
238 struct udp_sock udp;
239
240 struct ipv6_pinfo inet6;
241};
242
243struct tcp6_sock {
244 struct tcp_sock tcp;
245
246 struct ipv6_pinfo inet6;
247};
248
249extern int inet6_sk_rebuild_header(struct sock *sk);
250
251struct tcp6_timewait_sock {
252 struct tcp_timewait_sock tcp6tw_tcp;
253};
254
255#if IS_ENABLED(CONFIG_IPV6)
256static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
257{
258 return inet_sk(__sk)->pinet6;
259}
260
261static inline struct raw6_sock *raw6_sk(const struct sock *sk)
262{
263 return (struct raw6_sock *)sk;
264}
265
266static inline void inet_sk_copy_descendant(struct sock *sk_to,
267 const struct sock *sk_from)
268{
269 int ancestor_size = sizeof(struct inet_sock);
270
271 if (sk_from->sk_family == PF_INET6)
272 ancestor_size += sizeof(struct ipv6_pinfo);
273
274 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
275}
276
277#define __ipv6_only_sock(sk) (sk->sk_ipv6only)
278#define ipv6_only_sock(sk) (__ipv6_only_sock(sk))
279#define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \
280 inet6_sk(sk)->rxopt.bits.rxinfo)
281
282static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
283{
284 if (sk->sk_family == AF_INET6)
285 return &sk->sk_v6_rcv_saddr;
286 return NULL;
287}
288
289static inline int inet_v6_ipv6only(const struct sock *sk)
290{
291
292 return ipv6_only_sock(sk);
293}
294#else
295#define __ipv6_only_sock(sk) 0
296#define ipv6_only_sock(sk) 0
297#define ipv6_sk_rxinfo(sk) 0
298
299static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
300{
301 return NULL;
302}
303
304static inline struct inet6_request_sock *
305 inet6_rsk(const struct request_sock *rsk)
306{
307 return NULL;
308}
309
310static inline struct raw6_sock *raw6_sk(const struct sock *sk)
311{
312 return NULL;
313}
314
315#define inet6_rcv_saddr(__sk) NULL
316#define tcp_twsk_ipv6only(__sk) 0
317#define inet_v6_ipv6only(__sk) 0
318#endif
319
320#define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
321 (((__sk)->sk_portpair == (__ports)) && \
322 ((__sk)->sk_family == AF_INET6) && \
323 ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr)) && \
324 ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr)) && \
325 (!(__sk)->sk_bound_dev_if || \
326 ((__sk)->sk_bound_dev_if == (__dif))) && \
327 net_eq(sock_net(__sk), (__net)))
328
329#endif
330
