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[deliverable/linux.git] / include / linux / ipv6.h
CommitLineData
1da177e4
LT
1#ifndef _IPV6_H
2#define _IPV6_H
3
607ca46e 4#include <uapi/linux/ipv6.h>
1da177e4 5
1da177e4 6#define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
1da177e4
LT
7/*
8 * This structure contains configuration options per IPv6 link.
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;
fc4eba58
HFS
22 __s32 mldv1_unsolicited_report_interval;
23 __s32 mldv2_unsolicited_report_interval;
1da177e4
LT
24 __s32 use_tempaddr;
25 __s32 temp_valid_lft;
26 __s32 temp_prefered_lft;
27 __s32 regen_max_retry;
28 __s32 max_desync_factor;
1da177e4 29 __s32 max_addresses;
65f5c7c1 30 __s32 accept_ra_defrtr;
c4fd30eb 31 __s32 accept_ra_pinfo;
930d6ff2
YH
32#ifdef CONFIG_IPV6_ROUTER_PREF
33 __s32 accept_ra_rtr_pref;
52e16356 34 __s32 rtr_probe_interval;
09c884d4
YH
35#ifdef CONFIG_IPV6_ROUTE_INFO
36 __s32 accept_ra_rt_info_max_plen;
37#endif
930d6ff2 38#endif
fbea49e1 39 __s32 proxy_ndp;
0bcbc926 40 __s32 accept_source_route;
95c385b4
NH
41#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
42 __s32 optimistic_dad;
7bc570c8
YH
43#endif
44#ifdef CONFIG_IPV6_MROUTE
45 __s32 mc_forwarding;
95c385b4 46#endif
778d80be 47 __s32 disable_ipv6;
1b34be74 48 __s32 accept_dad;
f7734fdf 49 __s32 force_tllao;
5cb04436 50 __s32 ndisc_notify;
b800c3b9 51 __s32 suppress_frag_ndisc;
1da177e4
LT
52 void *sysctl;
53};
56d417b1
BH
54
55struct ipv6_params {
56 __s32 disable_ipv6;
57 __s32 autoconf;
58};
59extern struct ipv6_params ipv6_defaults;
1da177e4 60#include <linux/icmpv6.h>
1da177e4
LT
61#include <linux/tcp.h>
62#include <linux/udp.h>
63
14c85021
ACM
64#include <net/inet_sock.h>
65
0660e03f
ACM
66static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
67{
68 return (struct ipv6hdr *)skb_network_header(skb);
69}
70
6a674e9c
JG
71static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb)
72{
73 return (struct ipv6hdr *)skb_inner_network_header(skb);
74}
75
39b89160
ACM
76static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
77{
9c70220b 78 return (struct ipv6hdr *)skb_transport_header(skb);
39b89160
ACM
79}
80
1da177e4
LT
81/*
82 This structure contains results of exthdrs parsing
83 as offsets from skb->nh.
84 */
85
86struct inet6_skb_parm {
87 int iif;
dd3332bf 88 __be16 ra;
1da177e4
LT
89 __u16 hop;
90 __u16 dst0;
91 __u16 srcrt;
92 __u16 dst1;
333fad53 93 __u16 lastopt;
e7c38157 94 __u16 nhoff;
3e3850e9 95 __u16 flags;
59fbb3a6 96#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
8dd7368d
DM
97 __u16 dsthao;
98#endif
4cdd3408 99 __u16 frag_max_size;
3e3850e9
PM
100
101#define IP6SKB_XFRM_TRANSFORMED 1
7bc570c8 102#define IP6SKB_FORWARDED 2
9c6eb28a 103#define IP6SKB_REROUTED 4
dd3332bf 104#define IP6SKB_ROUTERALERT 8
f46078cf 105#define IP6SKB_FRAGMENTED 16
1da177e4
LT
106};
107
108#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
4b340ae2 109#define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
1da177e4 110
505cbfc5
ACM
111static inline int inet6_iif(const struct sk_buff *skb)
112{
113 return IP6CB(skb)->iif;
114}
115
ca304b61
ACM
116struct tcp6_request_sock {
117 struct tcp_request_sock tcp6rsk_tcp;
ca304b61 118};
2e6599cb 119
20283d84
HX
120struct ipv6_mc_socklist;
121struct ipv6_ac_socklist;
122struct ipv6_fl_socklist;
123
1da177e4
LT
124/**
125 * struct ipv6_pinfo - ipv6 private area
126 *
127 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
128 * this _must_ be the last member, so that inet6_sk_generic
129 * is able to calculate its offset from the base struct sock
130 * by using the struct proto->slab_obj_size member. -acme
131 */
132struct ipv6_pinfo {
133 struct in6_addr saddr;
b24a2516 134 struct in6_pktinfo sticky_pktinfo;
d3818c92 135 const struct in6_addr *daddr_cache;
8e1ef0a9 136#ifdef CONFIG_IPV6_SUBTREES
d3818c92 137 const struct in6_addr *saddr_cache;
8e1ef0a9 138#endif
1da177e4 139
90bcaf7b 140 __be32 flow_label;
1da177e4 141 __u32 frag_size;
1d5d236d
YH
142
143 /*
144 * Packed in 16bits.
145 * Omit one shift by by putting the signed field at MSB.
146 */
147#if defined(__BIG_ENDIAN_BITFIELD)
148 __s16 hop_limit:9;
149 __u16 __unused_1:7;
150#else
151 __u16 __unused_1:7;
152 __s16 hop_limit:9;
153#endif
154
155#if defined(__BIG_ENDIAN_BITFIELD)
156 /* Packed in 16bits. */
157 __s16 mcast_hops:9;
158 __u16 __unused_2:6,
159 mc_loop:1;
160#else
161 __u16 mc_loop:1,
162 __unused_2:6;
163 __s16 mcast_hops:9;
164#endif
c4062dfc 165 int ucast_oif;
1da177e4
LT
166 int mcast_oif;
167
168 /* pktoption flags */
169 union {
170 struct {
4c752098
YH
171 __u16 srcrt:1,
172 osrcrt:1,
1da177e4 173 rxinfo:1,
333fad53 174 rxoinfo:1,
1da177e4 175 rxhlim:1,
333fad53 176 rxohlim:1,
1da177e4 177 hopopts:1,
333fad53 178 ohopopts:1,
1da177e4 179 dstopts:1,
333fad53 180 odstopts:1,
41a1f8ea 181 rxflow:1,
793b1473 182 rxtclass:1,
6c468622
BS
183 rxpmtu:1,
184 rxorigdstaddr:1;
185 /* 2 bits hole */
1da177e4 186 } bits;
333fad53 187 __u16 all;
1da177e4
LT
188 } rxopt;
189
190 /* sockopt flags */
793b1473 191 __u16 recverr:1,
1da177e4
LT
192 sndflow:1,
193 pmtudisc:2,
7cbca67c 194 ipv6only:1,
793b1473 195 srcprefs:3, /* 001: prefer temporary address
7cbca67c
YH
196 * 010: prefer public address
197 * 100: prefer care-of address
198 */
793b1473 199 dontfrag:1;
e802af9c 200 __u8 min_hopcount;
41a1f8ea 201 __u8 tclass;
4c507d28 202 __u8 rcv_tclass;
1da177e4
LT
203
204 __u32 dst_cookie;
5d299f3d 205 __u32 rx_dst_cookie;
1da177e4 206
456b61bc 207 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
1da177e4 208 struct ipv6_ac_socklist *ipv6_ac_list;
18367681 209 struct ipv6_fl_socklist __rcu *ipv6_fl_list;
1da177e4
LT
210
211 struct ipv6_txoptions *opt;
212 struct sk_buff *pktoptions;
4b340ae2 213 struct sk_buff *rxpmtu;
1da177e4
LT
214 struct {
215 struct ipv6_txoptions *opt;
47254745
YH
216 u8 hop_limit;
217 u8 tclass;
1da177e4
LT
218 } cork;
219};
220
221/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
222struct raw6_sock {
223 /* inet_sock has to be the first member of raw6_sock */
224 struct inet_sock inet;
225 __u32 checksum; /* perform checksum */
226 __u32 offset; /* checksum offset */
227 struct icmp6_filter filter;
d1db275d 228 __u32 ip6mr_table;
1da177e4
LT
229 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
230 struct ipv6_pinfo inet6;
231};
232
233struct udp6_sock {
234 struct udp_sock udp;
235 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
236 struct ipv6_pinfo inet6;
237};
238
239struct tcp6_sock {
240 struct tcp_sock tcp;
241 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
242 struct ipv6_pinfo inet6;
243};
244
b9750ce1
ACM
245extern int inet6_sk_rebuild_header(struct sock *sk);
246
48ee3569
DM
247struct tcp6_timewait_sock {
248 struct tcp_timewait_sock tcp6tw_tcp;
48ee3569
DM
249};
250
dfd56b8b 251#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT
252static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
253{
254 return inet_sk(__sk)->pinet6;
255}
256
ca304b61
ACM
257static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
258{
259 struct request_sock *req = reqsk_alloc(ops);
260
634fb979
ED
261 if (req)
262 inet_rsk(req)->pktopts = NULL;
ca304b61
ACM
263
264 return req;
265}
266
1da177e4
LT
267static inline struct raw6_sock *raw6_sk(const struct sock *sk)
268{
269 return (struct raw6_sock *)sk;
270}
271
272static inline void inet_sk_copy_descendant(struct sock *sk_to,
273 const struct sock *sk_from)
274{
275 int ancestor_size = sizeof(struct inet_sock);
276
277 if (sk_from->sk_family == PF_INET6)
278 ancestor_size += sizeof(struct ipv6_pinfo);
279
280 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
281}
282
283#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
284#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
8feaf0c0 285
efe4208f 286static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
8feaf0c0 287{
efe4208f
ED
288 if (sk->sk_family == AF_INET6)
289 return &sk->sk_v6_rcv_saddr;
290 return NULL;
8feaf0c0
ACM
291}
292
463c84b9 293static inline int inet_v6_ipv6only(const struct sock *sk)
8feaf0c0
ACM
294{
295 return likely(sk->sk_state != TCP_TIME_WAIT) ?
3f421baa 296 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
8feaf0c0 297}
1da177e4
LT
298#else
299#define __ipv6_only_sock(sk) 0
300#define ipv6_only_sock(sk) 0
301
302static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
303{
304 return NULL;
305}
306
ca304b61
ACM
307static inline struct inet6_request_sock *
308 inet6_rsk(const struct request_sock *rsk)
309{
310 return NULL;
311}
312
1da177e4
LT
313static inline struct raw6_sock *raw6_sk(const struct sock *sk)
314{
315 return NULL;
316}
317
0fa1a53e 318#define inet6_rcv_saddr(__sk) NULL
8feaf0c0 319#define tcp_twsk_ipv6only(__sk) 0
463c84b9 320#define inet_v6_ipv6only(__sk) 0
dfd56b8b 321#endif /* IS_ENABLED(CONFIG_IPV6) */
1da177e4 322
ce43b03e 323#define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
50805466 324 (((__sk)->sk_portpair == (__ports)) && \
ce43b03e 325 ((__sk)->sk_family == AF_INET6) && \
efe4208f
ED
326 ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr)) && \
327 ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr)) && \
ce43b03e
ED
328 (!(__sk)->sk_bound_dev_if || \
329 ((__sk)->sk_bound_dev_if == (__dif))) && \
330 net_eq(sock_net(__sk), (__net)))
331
8feaf0c0 332#endif /* _IPV6_H */
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