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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _IPV6_H
2#define _IPV6_H
3
David Howells607ca462012-10-13 10:46:48 +01004#include <uapi/linux/ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07005
Linus Torvalds1da177e2005-04-16 15:20:36 -07006#define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
Paul Durrant1431fb32013-12-03 17:39:29 +00007#define ipv6_authlen(p) (((p)->hdrlen+2) << 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07008/*
9 * This structure contains configuration options per IPv6 link.
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;
Hannes Frederic Sowafc4eba52013-08-14 01:03:46 +020023 __s32 mldv1_unsolicited_report_interval;
24 __s32 mldv2_unsolicited_report_interval;
Linus Torvalds1da177e2005-04-16 15:20:36 -070025 __s32 use_tempaddr;
26 __s32 temp_valid_lft;
27 __s32 temp_prefered_lft;
28 __s32 regen_max_retry;
29 __s32 max_desync_factor;
Linus Torvalds1da177e2005-04-16 15:20:36 -070030 __s32 max_addresses;
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -080031 __s32 accept_ra_defrtr;
Hangbin Liu8013d1d72015-07-30 14:28:42 +080032 __s32 accept_ra_min_hop_limit;
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -080033 __s32 accept_ra_pinfo;
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -080034#ifdef CONFIG_IPV6_ROUTER_PREF
35 __s32 accept_ra_rtr_pref;
YOSHIFUJI Hideaki52e163562006-03-20 17:05:47 -080036 __s32 rtr_probe_interval;
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -080037#ifdef CONFIG_IPV6_ROUTE_INFO
38 __s32 accept_ra_rt_info_max_plen;
39#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -080040#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -070041 __s32 proxy_ndp;
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -070042 __s32 accept_source_route;
Ben Greeard9333192014-06-25 14:44:53 -070043 __s32 accept_ra_from_local;
Neil Horman95c385b2007-04-25 17:08:10 -070044#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
45 __s32 optimistic_dad;
Erik Kline7fd25612014-10-28 18:11:14 +090046 __s32 use_optimistic;
Neil Horman95c385b2007-04-25 17:08:10 -070047#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090048#ifdef CONFIG_IPV6_MROUTE
49 __s32 mc_forwarding;
50#endif
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +090051 __s32 disable_ipv6;
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +090052 __s32 accept_dad;
Octavian Purdilaf7734fd2009-10-02 11:39:15 +000053 __s32 force_tllao;
Hannes Frederic Sowa5cb04432012-11-06 16:46:20 +000054 __s32 ndisc_notify;
Hannes Frederic Sowab800c3b2013-08-27 01:36:51 +020055 __s32 suppress_frag_ndisc;
Harout Hedeshianc2943f12015-01-20 10:06:05 -070056 __s32 accept_ra_mtu;
Hannes Frederic Sowa3d1bec92015-03-23 23:36:00 +010057 struct ipv6_stable_secret {
58 bool initialized;
59 struct in6_addr secret;
60 } stable_secret;
Erik Kline3985e8a2015-07-22 16:38:25 +090061 __s32 use_oif_addrs_only;
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 void *sysctl;
63};
Brian Haley56d417b2009-06-01 03:07:33 -070064
65struct ipv6_params {
66 __s32 disable_ipv6;
67 __s32 autoconf;
68};
69extern struct ipv6_params ipv6_defaults;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070#include <linux/icmpv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070071#include <linux/tcp.h>
72#include <linux/udp.h>
73
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020074#include <net/inet_sock.h>
75
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -070076static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
77{
78 return (struct ipv6hdr *)skb_network_header(skb);
79}
80
Joseph Gasparakis6a674e92012-12-07 14:14:14 +000081static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb)
82{
83 return (struct ipv6hdr *)skb_inner_network_header(skb);
84}
85
Arnaldo Carvalho de Melo39b89162007-04-10 21:06:25 -070086static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
87{
Arnaldo Carvalho de Melo9c702202007-04-25 18:04:18 -070088 return (struct ipv6hdr *)skb_transport_header(skb);
Arnaldo Carvalho de Melo39b89162007-04-10 21:06:25 -070089}
90
Linus Torvalds1da177e2005-04-16 15:20:36 -070091/*
92 This structure contains results of exthdrs parsing
93 as offsets from skb->nh.
94 */
95
96struct inet6_skb_parm {
97 int iif;
YOSHIFUJI Hideaki / 吉藤英明dd3332b2013-01-13 05:02:45 +000098 __be16 ra;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 __u16 dst0;
100 __u16 srcrt;
101 __u16 dst1;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900102 __u16 lastopt;
David S. Millere7c38152010-07-19 22:01:26 -0700103 __u16 nhoff;
Patrick McHardy3e3850e2006-01-06 23:04:54 -0800104 __u16 flags;
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700105#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
David S. Miller8dd73682006-08-23 19:25:55 -0700106 __u16 dsthao;
107#endif
Patrick McHardy4cdd34082012-08-26 19:13:58 +0200108 __u16 frag_max_size;
Patrick McHardy3e3850e2006-01-06 23:04:54 -0800109
110#define IP6SKB_XFRM_TRANSFORMED 1
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900111#define IP6SKB_FORWARDED 2
Jan Engelhardt9c6eb282010-04-13 15:32:16 +0200112#define IP6SKB_REROUTED 4
YOSHIFUJI Hideaki / 吉藤英明dd3332b2013-01-13 05:02:45 +0000113#define IP6SKB_ROUTERALERT 8
Hannes Frederic Sowaf46078c2013-08-16 13:30:07 +0200114#define IP6SKB_FRAGMENTED 16
Florian Westphal8b58a392015-07-08 23:32:12 +0200115#define IP6SKB_HOPBYHOP 32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116};
117
118#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
Brian Haley4b340ae2010-04-23 11:26:09 +0000119#define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300121static inline int inet6_iif(const struct sk_buff *skb)
122{
123 return IP6CB(skb)->iif;
124}
125
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800126struct tcp6_request_sock {
127 struct tcp_request_sock tcp6rsk_tcp;
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800128};
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700129
Herbert Xu20283d82007-07-30 17:05:49 -0700130struct ipv6_mc_socklist;
131struct ipv6_ac_socklist;
132struct ipv6_fl_socklist;
133
Vlad Yasevich366e41d2015-01-31 10:40:13 -0500134struct inet6_cork {
135 struct ipv6_txoptions *opt;
136 u8 hop_limit;
137 u8 tclass;
138};
139
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140/**
141 * struct ipv6_pinfo - ipv6 private area
142 *
143 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
144 * this _must_ be the last member, so that inet6_sk_generic
145 * is able to calculate its offset from the base struct sock
146 * by using the struct proto->slab_obj_size member. -acme
147 */
148struct ipv6_pinfo {
149 struct in6_addr saddr;
Yang Hongyangb24a2512008-12-16 02:06:23 -0800150 struct in6_pktinfo sticky_pktinfo;
Eric Dumazetd3818c92012-07-17 21:38:04 +0000151 const struct in6_addr *daddr_cache;
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700152#ifdef CONFIG_IPV6_SUBTREES
Eric Dumazetd3818c92012-07-17 21:38:04 +0000153 const struct in6_addr *saddr_cache;
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700154#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
Al Viro90bcaf72006-11-08 00:25:17 -0800156 __be32 flow_label;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 __u32 frag_size;
YOSHIFUJI Hideaki1d5d2362008-03-10 10:56:55 -0400158
159 /*
160 * Packed in 16bits.
161 * Omit one shift by by putting the signed field at MSB.
162 */
163#if defined(__BIG_ENDIAN_BITFIELD)
164 __s16 hop_limit:9;
165 __u16 __unused_1:7;
166#else
167 __u16 __unused_1:7;
168 __s16 hop_limit:9;
169#endif
170
171#if defined(__BIG_ENDIAN_BITFIELD)
172 /* Packed in 16bits. */
173 __s16 mcast_hops:9;
174 __u16 __unused_2:6,
175 mc_loop:1;
176#else
177 __u16 mc_loop:1,
178 __unused_2:6;
179 __s16 mcast_hops:9;
180#endif
Erich E. Hooverc4062df2012-02-08 09:11:08 +0000181 int ucast_oif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 int mcast_oif;
183
184 /* pktoption flags */
185 union {
186 struct {
YOSHIFUJI Hideaki4c752092007-05-23 13:28:48 +0900187 __u16 srcrt:1,
188 osrcrt:1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 rxinfo:1,
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900190 rxoinfo:1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 rxhlim:1,
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900192 rxohlim:1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 hopopts:1,
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900194 ohopopts:1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 dstopts:1,
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900196 odstopts:1,
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900197 rxflow:1,
Brian Haley793b14732010-04-23 11:26:07 +0000198 rxtclass:1,
Balazs Scheidler6c468622010-10-21 16:08:28 +0200199 rxpmtu:1,
200 rxorigdstaddr:1;
201 /* 2 bits hole */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 } bits;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900203 __u16 all;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 } rxopt;
205
206 /* sockopt flags */
Brian Haley793b14732010-04-23 11:26:07 +0000207 __u16 recverr:1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 sndflow:1,
Florent Fourcotdf3687f2014-01-17 17:15:03 +0100209 repflow:1,
Hannes Frederic Sowa93b36cf2013-12-15 03:41:14 +0100210 pmtudisc:3,
Eric Dumazet9fe516b2014-06-27 08:36:16 -0700211 padding:1, /* 1 bit hole */
Brian Haley793b14732010-04-23 11:26:07 +0000212 srcprefs:3, /* 001: prefer temporary address
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +0900213 * 010: prefer public address
214 * 100: prefer care-of address
215 */
Tom Herbertcb1ce2e2014-07-01 21:33:10 -0700216 dontfrag:1,
217 autoflowlabel:1;
Stephen Hemmingere802af92010-04-22 15:24:53 -0700218 __u8 min_hopcount;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900219 __u8 tclass;
Florent Fourcot1397ed32013-12-08 15:46:57 +0100220 __be32 rcv_flowinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
222 __u32 dst_cookie;
Eric Dumazet5d299f32012-08-06 05:09:33 +0000223 __u32 rx_dst_cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
Eric Dumazet456b61b2010-11-23 13:12:15 +0000225 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 struct ipv6_ac_socklist *ipv6_ac_list;
YOSHIFUJI Hideaki / 吉藤英明18367682013-01-30 09:27:52 +0000227 struct ipv6_fl_socklist __rcu *ipv6_fl_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
229 struct ipv6_txoptions *opt;
230 struct sk_buff *pktoptions;
Brian Haley4b340ae2010-04-23 11:26:09 +0000231 struct sk_buff *rxpmtu;
Vlad Yasevich366e41d2015-01-31 10:40:13 -0500232 struct inet6_cork cork;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233};
234
235/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
236struct raw6_sock {
237 /* inet_sock has to be the first member of raw6_sock */
238 struct inet_sock inet;
239 __u32 checksum; /* perform checksum */
240 __u32 offset; /* checksum offset */
241 struct icmp6_filter filter;
Patrick McHardyd1db2752010-05-11 14:40:55 +0200242 __u32 ip6mr_table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
244 struct ipv6_pinfo inet6;
245};
246
247struct udp6_sock {
248 struct udp_sock udp;
249 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
250 struct ipv6_pinfo inet6;
251};
252
253struct tcp6_sock {
254 struct tcp_sock tcp;
255 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
256 struct ipv6_pinfo inet6;
257};
258
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800259extern int inet6_sk_rebuild_header(struct sock *sk);
260
David S. Miller48ee3562012-07-11 02:39:24 -0700261struct tcp6_timewait_sock {
262 struct tcp_timewait_sock tcp6tw_tcp;
David S. Miller48ee3562012-07-11 02:39:24 -0700263};
264
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000265#if IS_ENABLED(CONFIG_IPV6)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
267{
268 return inet_sk(__sk)->pinet6;
269}
270
271static inline struct raw6_sock *raw6_sk(const struct sock *sk)
272{
273 return (struct raw6_sock *)sk;
274}
275
276static inline void inet_sk_copy_descendant(struct sock *sk_to,
277 const struct sock *sk_from)
278{
279 int ancestor_size = sizeof(struct inet_sock);
280
281 if (sk_from->sk_family == PF_INET6)
282 ancestor_size += sizeof(struct ipv6_pinfo);
283
284 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
285}
286
Eric Dumazet9fe516b2014-06-27 08:36:16 -0700287#define __ipv6_only_sock(sk) (sk->sk_ipv6only)
288#define ipv6_only_sock(sk) (__ipv6_only_sock(sk))
Hannes Frederic Sowa4b261c752014-01-20 03:43:08 +0100289#define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \
290 inet6_sk(sk)->rxopt.bits.rxinfo)
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700291
Eric Dumazetefe42082013-10-03 15:42:29 -0700292static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700293{
Eric Dumazetefe42082013-10-03 15:42:29 -0700294 if (sk->sk_family == AF_INET6)
295 return &sk->sk_v6_rcv_saddr;
296 return NULL;
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700297}
298
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700299static inline int inet_v6_ipv6only(const struct sock *sk)
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700300{
Eric Dumazet9fe516b2014-06-27 08:36:16 -0700301 /* ipv6only field is at same position for timewait and other sockets */
302 return ipv6_only_sock(sk);
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700303}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304#else
305#define __ipv6_only_sock(sk) 0
306#define ipv6_only_sock(sk) 0
Hannes Frederic Sowa4b261c752014-01-20 03:43:08 +0100307#define ipv6_sk_rxinfo(sk) 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
309static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
310{
311 return NULL;
312}
313
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800314static inline struct inet6_request_sock *
315 inet6_rsk(const struct request_sock *rsk)
316{
317 return NULL;
318}
319
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320static inline struct raw6_sock *raw6_sk(const struct sock *sk)
321{
322 return NULL;
323}
324
Arnaldo Carvalho de Melo0fa1a532005-12-13 23:23:09 -0800325#define inet6_rcv_saddr(__sk) NULL
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700326#define tcp_twsk_ipv6only(__sk) 0
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700327#define inet_v6_ipv6only(__sk) 0
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000328#endif /* IS_ENABLED(CONFIG_IPV6) */
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700329#endif /* _IPV6_H */