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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _IPV6_H
2#define _IPV6_H
3
Jaswinder Singh Rajput5c6aa2b2009-01-30 21:46:43 +05304#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07005#include <linux/in6.h>
6#include <asm/byteorder.h>
7
8/* The latest drafts declared increase in minimal mtu up to 1280. */
9
10#define IPV6_MIN_MTU 1280
11
12/*
13 * Advanced API
14 * source interface/address selection, source routing, etc...
15 * *under construction*
16 */
17
18
19struct in6_pktinfo {
20 struct in6_addr ipi6_addr;
21 int ipi6_ifindex;
22};
23
Brian Haley793b1472010-04-23 11:26:07 +000024struct ip6_mtuinfo {
25 struct sockaddr_in6 ip6m_addr;
26 __u32 ip6m_mtu;
27};
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
29struct in6_ifreq {
30 struct in6_addr ifr6_addr;
31 __u32 ifr6_prefixlen;
32 int ifr6_ifindex;
33};
34
YOSHIFUJI Hideakibb4dbf92007-07-10 22:55:49 -070035#define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */
36#define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */
Noriaki TAKAMIYA642ec622006-08-23 19:15:07 -070037#define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
39/*
40 * routing header
41 */
42struct ipv6_rt_hdr {
43 __u8 nexthdr;
44 __u8 hdrlen;
45 __u8 type;
46 __u8 segments_left;
47
48 /*
49 * type specific data
50 * variable length field
51 */
52};
53
54
55struct ipv6_opt_hdr {
56 __u8 nexthdr;
57 __u8 hdrlen;
58 /*
59 * TLV encoded option data follows.
60 */
Changli Gao09cd2b92010-08-22 17:25:05 +000061} __attribute__((packed)); /* required for some archs */
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
63#define ipv6_destopt_hdr ipv6_opt_hdr
64#define ipv6_hopopt_hdr ipv6_opt_hdr
65
66#ifdef __KERNEL__
67#define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
68#endif
69
70/*
71 * routing header type 0 (used in cmsghdr struct)
72 */
73
74struct rt0_hdr {
75 struct ipv6_rt_hdr rt_hdr;
Brian Haleye6df4392005-09-10 00:15:06 -070076 __u32 reserved;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 struct in6_addr addr[0];
78
79#define rt0_type rt_hdr.type
80};
81
Noriaki TAKAMIYA642ec622006-08-23 19:15:07 -070082/*
83 * routing header type 2
84 */
85
86struct rt2_hdr {
87 struct ipv6_rt_hdr rt_hdr;
88 __u32 reserved;
89 struct in6_addr addr;
90
91#define rt2_type rt_hdr.type
92};
93
Noriaki TAKAMIYA842426e2006-08-23 19:21:34 -070094/*
95 * home address option in destination options header
96 */
97
98struct ipv6_destopt_hao {
99 __u8 type;
100 __u8 length;
101 struct in6_addr addr;
Changli Gao09cd2b92010-08-22 17:25:05 +0000102} __attribute__((packed));
Noriaki TAKAMIYA842426e2006-08-23 19:21:34 -0700103
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104/*
105 * IPv6 fixed header
106 *
107 * BEWARE, it is incorrect. The first 4 bits of flow_lbl
108 * are glued to priority now, forming "class".
109 */
110
111struct ipv6hdr {
112#if defined(__LITTLE_ENDIAN_BITFIELD)
113 __u8 priority:4,
114 version:4;
115#elif defined(__BIG_ENDIAN_BITFIELD)
116 __u8 version:4,
117 priority:4;
118#else
119#error "Please fix <asm/byteorder.h>"
120#endif
121 __u8 flow_lbl[3];
122
Al Viro43505072006-09-27 18:45:11 -0700123 __be16 payload_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 __u8 nexthdr;
125 __u8 hop_limit;
126
127 struct in6_addr saddr;
128 struct in6_addr daddr;
129};
130
David S. Millerebb36a92008-07-21 13:41:16 -0700131#ifdef __KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132/*
133 * This structure contains configuration options per IPv6 link.
134 */
135struct ipv6_devconf {
136 __s32 forwarding;
137 __s32 hop_limit;
138 __s32 mtu6;
139 __s32 accept_ra;
140 __s32 accept_redirects;
141 __s32 autoconf;
142 __s32 dad_transmits;
143 __s32 rtr_solicits;
144 __s32 rtr_solicit_interval;
145 __s32 rtr_solicit_delay;
146 __s32 force_mld_version;
147#ifdef CONFIG_IPV6_PRIVACY
148 __s32 use_tempaddr;
149 __s32 temp_valid_lft;
150 __s32 temp_prefered_lft;
151 __s32 regen_max_retry;
152 __s32 max_desync_factor;
153#endif
154 __s32 max_addresses;
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -0800155 __s32 accept_ra_defrtr;
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -0800156 __s32 accept_ra_pinfo;
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800157#ifdef CONFIG_IPV6_ROUTER_PREF
158 __s32 accept_ra_rtr_pref;
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -0800159 __s32 rtr_probe_interval;
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -0800160#ifdef CONFIG_IPV6_ROUTE_INFO
161 __s32 accept_ra_rt_info_max_plen;
162#endif
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800163#endif
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -0700164 __s32 proxy_ndp;
YOSHIFUJI Hideaki0bcbc922007-04-24 14:58:30 -0700165 __s32 accept_source_route;
Neil Horman95c385b2007-04-25 17:08:10 -0700166#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
167 __s32 optimistic_dad;
168#endif
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900169#ifdef CONFIG_IPV6_MROUTE
170 __s32 mc_forwarding;
171#endif
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +0900172 __s32 disable_ipv6;
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900173 __s32 accept_dad;
Octavian Purdilaf7734fd2009-10-02 11:39:15 +0000174 __s32 force_tllao;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 void *sysctl;
176};
Brian Haley56d417b2009-06-01 03:07:33 -0700177
178struct ipv6_params {
179 __s32 disable_ipv6;
180 __s32 autoconf;
181};
182extern struct ipv6_params ipv6_defaults;
David S. Millerebb36a92008-07-21 13:41:16 -0700183#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
185/* index values for the variables in ipv6_devconf */
186enum {
187 DEVCONF_FORWARDING = 0,
188 DEVCONF_HOPLIMIT,
189 DEVCONF_MTU6,
190 DEVCONF_ACCEPT_RA,
191 DEVCONF_ACCEPT_REDIRECTS,
192 DEVCONF_AUTOCONF,
193 DEVCONF_DAD_TRANSMITS,
194 DEVCONF_RTR_SOLICITS,
195 DEVCONF_RTR_SOLICIT_INTERVAL,
196 DEVCONF_RTR_SOLICIT_DELAY,
197 DEVCONF_USE_TEMPADDR,
198 DEVCONF_TEMP_VALID_LFT,
199 DEVCONF_TEMP_PREFERED_LFT,
200 DEVCONF_REGEN_MAX_RETRY,
201 DEVCONF_MAX_DESYNC_FACTOR,
202 DEVCONF_MAX_ADDRESSES,
203 DEVCONF_FORCE_MLD_VERSION,
YOSHIFUJI Hideaki65f5c7c2006-03-20 16:55:08 -0800204 DEVCONF_ACCEPT_RA_DEFRTR,
YOSHIFUJI Hideakic4fd30e2006-03-20 16:55:26 -0800205 DEVCONF_ACCEPT_RA_PINFO,
YOSHIFUJI Hideaki930d6ff2006-03-20 17:05:30 -0800206 DEVCONF_ACCEPT_RA_RTR_PREF,
YOSHIFUJI Hideaki52e16352006-03-20 17:05:47 -0800207 DEVCONF_RTR_PROBE_INTERVAL,
YOSHIFUJI Hideaki09c884d2006-03-20 17:07:03 -0800208 DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
YOSHIFUJI Hideakifbea49e2006-09-22 14:43:49 -0700209 DEVCONF_PROXY_NDP,
Neil Horman95c385b2007-04-25 17:08:10 -0700210 DEVCONF_OPTIMISTIC_DAD,
YOSHIFUJI Hideaki45402502007-05-29 13:23:34 -0700211 DEVCONF_ACCEPT_SOURCE_ROUTE,
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900212 DEVCONF_MC_FORWARDING,
YOSHIFUJI Hideaki778d80b2008-06-28 14:17:11 +0900213 DEVCONF_DISABLE_IPV6,
YOSHIFUJI Hideaki1b34be72008-06-28 14:18:38 +0900214 DEVCONF_ACCEPT_DAD,
Jin Dongminge0e6f552009-10-08 22:44:47 -0700215 DEVCONF_FORCE_TLLAO,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 DEVCONF_MAX
217};
218
219#ifdef __KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220#include <linux/icmpv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221#include <linux/tcp.h>
222#include <linux/udp.h>
223
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200224#include <net/inet_sock.h>
225
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -0700226static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
227{
228 return (struct ipv6hdr *)skb_network_header(skb);
229}
230
Arnaldo Carvalho de Melo39b89162007-04-10 21:06:25 -0700231static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
232{
Arnaldo Carvalho de Melo9c702202007-04-25 18:04:18 -0700233 return (struct ipv6hdr *)skb_transport_header(skb);
Arnaldo Carvalho de Melo39b89162007-04-10 21:06:25 -0700234}
235
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236/*
237 This structure contains results of exthdrs parsing
238 as offsets from skb->nh.
239 */
240
241struct inet6_skb_parm {
242 int iif;
243 __u16 ra;
244 __u16 hop;
245 __u16 dst0;
246 __u16 srcrt;
247 __u16 dst1;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900248 __u16 lastopt;
David S. Millere7c38152010-07-19 22:01:26 -0700249 __u16 nhoff;
Patrick McHardy3e3850e2006-01-06 23:04:54 -0800250 __u16 flags;
Masahide NAKAMURA59fbb3a62007-06-26 23:56:32 -0700251#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
David S. Miller8dd73682006-08-23 19:25:55 -0700252 __u16 dsthao;
253#endif
Patrick McHardy3e3850e2006-01-06 23:04:54 -0800254
255#define IP6SKB_XFRM_TRANSFORMED 1
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +0900256#define IP6SKB_FORWARDED 2
Jan Engelhardt9c6eb282010-04-13 15:32:16 +0200257#define IP6SKB_REROUTED 4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258};
259
260#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
Brian Haley4b340ae2010-04-23 11:26:09 +0000261#define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300263static inline int inet6_iif(const struct sk_buff *skb)
264{
265 return IP6CB(skb)->iif;
266}
267
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800268struct inet6_request_sock {
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700269 struct in6_addr loc_addr;
270 struct in6_addr rmt_addr;
271 struct sk_buff *pktopts;
272 int iif;
273};
274
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800275struct tcp6_request_sock {
276 struct tcp_request_sock tcp6rsk_tcp;
277 struct inet6_request_sock tcp6rsk_inet6;
278};
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700279
Herbert Xu20283d82007-07-30 17:05:49 -0700280struct ipv6_mc_socklist;
281struct ipv6_ac_socklist;
282struct ipv6_fl_socklist;
283
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284/**
285 * struct ipv6_pinfo - ipv6 private area
286 *
287 * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc)
288 * this _must_ be the last member, so that inet6_sk_generic
289 * is able to calculate its offset from the base struct sock
290 * by using the struct proto->slab_obj_size member. -acme
291 */
292struct ipv6_pinfo {
293 struct in6_addr saddr;
294 struct in6_addr rcv_saddr;
295 struct in6_addr daddr;
Yang Hongyangb24a2512008-12-16 02:06:23 -0800296 struct in6_pktinfo sticky_pktinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 struct in6_addr *daddr_cache;
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700298#ifdef CONFIG_IPV6_SUBTREES
299 struct in6_addr *saddr_cache;
300#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301
Al Viro90bcaf72006-11-08 00:25:17 -0800302 __be32 flow_label;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 __u32 frag_size;
YOSHIFUJI Hideaki1d5d2362008-03-10 10:56:55 -0400304
305 /*
306 * Packed in 16bits.
307 * Omit one shift by by putting the signed field at MSB.
308 */
309#if defined(__BIG_ENDIAN_BITFIELD)
310 __s16 hop_limit:9;
311 __u16 __unused_1:7;
312#else
313 __u16 __unused_1:7;
314 __s16 hop_limit:9;
315#endif
316
317#if defined(__BIG_ENDIAN_BITFIELD)
318 /* Packed in 16bits. */
319 __s16 mcast_hops:9;
320 __u16 __unused_2:6,
321 mc_loop:1;
322#else
323 __u16 mc_loop:1,
324 __unused_2:6;
325 __s16 mcast_hops:9;
326#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 int mcast_oif;
328
329 /* pktoption flags */
330 union {
331 struct {
YOSHIFUJI Hideaki4c752092007-05-23 13:28:48 +0900332 __u16 srcrt:1,
333 osrcrt:1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 rxinfo:1,
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900335 rxoinfo:1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 rxhlim:1,
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900337 rxohlim:1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 hopopts:1,
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900339 ohopopts:1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 dstopts:1,
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900341 odstopts:1,
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900342 rxflow:1,
Brian Haley793b1472010-04-23 11:26:07 +0000343 rxtclass:1,
Balazs Scheidler6c468622010-10-21 16:08:28 +0200344 rxpmtu:1,
345 rxorigdstaddr:1;
346 /* 2 bits hole */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 } bits;
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900348 __u16 all;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 } rxopt;
350
351 /* sockopt flags */
Brian Haley793b1472010-04-23 11:26:07 +0000352 __u16 recverr:1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 sndflow:1,
354 pmtudisc:2,
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +0900355 ipv6only:1,
Brian Haley793b1472010-04-23 11:26:07 +0000356 srcprefs:3, /* 001: prefer temporary address
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +0900357 * 010: prefer public address
358 * 100: prefer care-of address
359 */
Brian Haley793b1472010-04-23 11:26:07 +0000360 dontfrag:1;
Stephen Hemmingere802af92010-04-22 15:24:53 -0700361 __u8 min_hopcount;
YOSHIFUJI Hideaki41a1f8e2005-09-08 10:19:03 +0900362 __u8 tclass;
Brian Haley793b1472010-04-23 11:26:07 +0000363 __u8 padding;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
365 __u32 dst_cookie;
366
Eric Dumazet456b61b2010-11-23 13:12:15 +0000367 struct ipv6_mc_socklist __rcu *ipv6_mc_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 struct ipv6_ac_socklist *ipv6_ac_list;
369 struct ipv6_fl_socklist *ipv6_fl_list;
370
371 struct ipv6_txoptions *opt;
372 struct sk_buff *pktoptions;
Brian Haley4b340ae2010-04-23 11:26:09 +0000373 struct sk_buff *rxpmtu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 struct {
375 struct ipv6_txoptions *opt;
YOSHIFUJI Hideaki47254742008-03-10 04:41:33 -0400376 u8 hop_limit;
377 u8 tclass;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 } cork;
379};
380
381/* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */
382struct raw6_sock {
383 /* inet_sock has to be the first member of raw6_sock */
384 struct inet_sock inet;
385 __u32 checksum; /* perform checksum */
386 __u32 offset; /* checksum offset */
387 struct icmp6_filter filter;
Patrick McHardyd1db2752010-05-11 14:40:55 +0200388 __u32 ip6mr_table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
390 struct ipv6_pinfo inet6;
391};
392
393struct udp6_sock {
394 struct udp_sock udp;
395 /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */
396 struct ipv6_pinfo inet6;
397};
398
399struct tcp6_sock {
400 struct tcp_sock tcp;
401 /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */
402 struct ipv6_pinfo inet6;
403};
404
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800405extern int inet6_sk_rebuild_header(struct sock *sk);
406
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
408static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
409{
410 return inet_sk(__sk)->pinet6;
411}
412
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800413static inline struct inet6_request_sock *
414 inet6_rsk(const struct request_sock *rsk)
415{
416 return (struct inet6_request_sock *)(((u8 *)rsk) +
417 inet_rsk(rsk)->inet6_rsk_offset);
418}
419
420static inline u32 inet6_rsk_offset(struct request_sock *rsk)
421{
422 return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
423}
424
425static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
426{
427 struct request_sock *req = reqsk_alloc(ops);
428
Arnaldo Carvalho de Meloce4a7d02008-06-10 12:39:35 -0700429 if (req != NULL) {
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800430 inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
Arnaldo Carvalho de Meloce4a7d02008-06-10 12:39:35 -0700431 inet6_rsk(req)->pktopts = NULL;
432 }
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800433
434 return req;
435}
436
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437static inline struct raw6_sock *raw6_sk(const struct sock *sk)
438{
439 return (struct raw6_sock *)sk;
440}
441
442static inline void inet_sk_copy_descendant(struct sock *sk_to,
443 const struct sock *sk_from)
444{
445 int ancestor_size = sizeof(struct inet_sock);
446
447 if (sk_from->sk_family == PF_INET6)
448 ancestor_size += sizeof(struct ipv6_pinfo);
449
450 __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
451}
452
453#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
454#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700455
Arnaldo Carvalho de Melo0fa1a532005-12-13 23:23:09 -0800456struct inet6_timewait_sock {
457 struct in6_addr tw_v6_daddr;
458 struct in6_addr tw_v6_rcv_saddr;
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700459};
460
Arnaldo Carvalho de Melo0fa1a532005-12-13 23:23:09 -0800461struct tcp6_timewait_sock {
462 struct tcp_timewait_sock tcp6tw_tcp;
463 struct inet6_timewait_sock tcp6tw_inet6;
464};
465
466static inline u16 inet6_tw_offset(const struct proto *prot)
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700467{
Arnaldo Carvalho de Melo6d6ee432005-12-13 23:25:19 -0800468 return prot->twsk_prot->twsk_obj_size -
469 sizeof(struct inet6_timewait_sock);
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700470}
471
Arnaldo Carvalho de Melo0fa1a532005-12-13 23:23:09 -0800472static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
473{
474 return (struct inet6_timewait_sock *)(((u8 *)sk) +
475 inet_twsk(sk)->tw_ipv6_offset);
476}
477
478static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700479{
480 return likely(sk->sk_state != TCP_TIME_WAIT) ?
Arnaldo Carvalho de Melo0fa1a532005-12-13 23:23:09 -0800481 &inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700482}
483
Arnaldo Carvalho de Melo0fa1a532005-12-13 23:23:09 -0800484static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700485{
Arnaldo Carvalho de Melo0fa1a532005-12-13 23:23:09 -0800486 return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700487}
488
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700489static inline int inet_v6_ipv6only(const struct sock *sk)
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700490{
491 return likely(sk->sk_state != TCP_TIME_WAIT) ?
Arnaldo Carvalho de Melo3f421ba2005-08-09 20:11:08 -0700492 ipv6_only_sock(sk) : inet_twsk(sk)->tw_ipv6only;
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700493}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494#else
495#define __ipv6_only_sock(sk) 0
496#define ipv6_only_sock(sk) 0
497
498static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
499{
500 return NULL;
501}
502
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800503static inline struct inet6_request_sock *
504 inet6_rsk(const struct request_sock *rsk)
505{
506 return NULL;
507}
508
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509static inline struct raw6_sock *raw6_sk(const struct sock *sk)
510{
511 return NULL;
512}
513
Arnaldo Carvalho de Melo0fa1a532005-12-13 23:23:09 -0800514#define __inet6_rcv_saddr(__sk) NULL
515#define inet6_rcv_saddr(__sk) NULL
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700516#define tcp_twsk_ipv6only(__sk) 0
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700517#define inet_v6_ipv6only(__sk) 0
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700518#endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519
Pavel Emelyanovd86e0da2008-01-31 05:07:21 -0800520#define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900521 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000522 ((*((__portpair *)&(inet_sk(__sk)->inet_dport))) == (__ports)) && \
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700523 ((__sk)->sk_family == AF_INET6) && \
524 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
525 ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
526 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527
Pavel Emelyanovd86e0da2008-01-31 05:07:21 -0800528#define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900529 (((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net) && \
Pavel Emelyanov535174e2008-01-31 05:03:27 -0800530 (*((__portpair *)&(inet_twsk(__sk)->tw_dport)) == (__ports)) && \
531 ((__sk)->sk_family == PF_INET6) && \
532 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr))) && \
533 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_rcv_saddr, (__daddr))) && \
534 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
535
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700536#endif /* __KERNEL__ */
537
538#endif /* _IPV6_H */