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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * inet6 interface/address list definitions
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
7 *
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 */
14
15#ifndef _NET_IF_INET6_H
16#define _NET_IF_INET6_H
17
18#include <net/snmp.h>
19#include <linux/ipv6.h>
Reshetova, Elena1be92462017-07-04 09:34:55 +030020#include <linux/refcount.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
22/* inet6_dev.if_flags */
23
24#define IF_RA_OTHERCONF 0x80
25#define IF_RA_MANAGED 0x40
26#define IF_RA_RCVD 0x20
27#define IF_RS_SENT 0x10
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +090028#define IF_READY 0x80000000
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
30/* prefix flags */
31#define IF_PREFIX_ONLINK 0x01
32#define IF_PREFIX_AUTOCONF 0x02
33
Herbert Xue9d3e082010-05-18 15:36:06 -070034enum {
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +010035 INET6_IFADDR_STATE_PREDAD,
Herbert Xue9d3e082010-05-18 15:36:06 -070036 INET6_IFADDR_STATE_DAD,
37 INET6_IFADDR_STATE_POSTDAD,
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +010038 INET6_IFADDR_STATE_ERRDAD,
Herbert Xue9d3e082010-05-18 15:36:06 -070039 INET6_IFADDR_STATE_DEAD,
40};
41
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +000042struct inet6_ifaddr {
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 struct in6_addr addr;
44 __u32 prefix_len;
David Ahern8308f3f2018-05-27 08:09:58 -070045 __u32 rt_priority;
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +010046
Lorenzo Colitti76f793e2011-07-26 13:50:49 +000047 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 __u32 valid_lft;
49 __u32 prefered_lft;
Reshetova, Elena271201c2017-07-04 09:34:56 +030050 refcount_t refcnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 spinlock_t lock;
Herbert Xue9d3e082010-05-18 15:36:06 -070052
53 int state;
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
Jiri Pirko479840f2013-12-06 09:45:21 +010055 __u32 flags;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +020056 __u8 dad_probes;
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +010057 __u8 stable_privacy_retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
59 __u16 scope;
Erik Nordmarkadc176c2016-12-02 14:00:08 -080060 __u64 dad_nonce;
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Richard Kennedy04ec5cf2009-03-21 13:29:05 -070062 unsigned long cstamp; /* created timestamp */
63 unsigned long tstamp; /* updated timestamp */
64
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +010065 struct delayed_work dad_work;
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
67 struct inet6_dev *idev;
David Ahern8d1c8022018-04-17 17:33:26 -070068 struct fib6_info *rt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
stephen hemmingerc2e21292010-03-17 20:31:10 +000070 struct hlist_node addr_lst;
stephen hemminger502a2ff2010-03-17 20:31:13 +000071 struct list_head if_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
stephen hemminger372e6c82010-03-17 20:31:09 +000073 struct list_head tmp_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 struct inet6_ifaddr *ifpub;
75 int regen_count;
David S. Miller5d9efa72013-10-28 20:07:50 -040076
Daniel Borkmann617fe292013-04-09 03:47:16 +000077 bool tokenized;
78
stephen hemminger5c578aed2010-03-17 20:31:11 +000079 struct rcu_head rcu;
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +000080 struct in6_addr peer_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081};
82
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +000083struct ip6_sf_socklist {
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 unsigned int sl_max;
85 unsigned int sl_count;
86 struct in6_addr sl_addr[0];
87};
88
89#define IP6_SFLSIZE(count) (sizeof(struct ip6_sf_socklist) + \
90 (count) * sizeof(struct in6_addr))
91
92#define IP6_SFBLOCK 10 /* allocate this many at once */
93
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +000094struct ipv6_mc_socklist {
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 struct in6_addr addr;
96 int ifindex;
Eric Dumazet456b61b2010-11-23 13:12:15 +000097 struct ipv6_mc_socklist __rcu *next;
David L Stevens5ab4a6c2005-12-27 14:03:00 -080098 rwlock_t sflock;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
100 struct ip6_sf_socklist *sflist;
Eric Dumazet456b61b2010-11-23 13:12:15 +0000101 struct rcu_head rcu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102};
103
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000104struct ip6_sf_list {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 struct ip6_sf_list *sf_next;
106 struct in6_addr sf_addr;
107 unsigned long sf_count[2]; /* include/exclude counts */
108 unsigned char sf_gsresp; /* include in g & s response? */
109 unsigned char sf_oldin; /* change state */
110 unsigned char sf_crcount; /* retrans. left to send */
111};
112
113#define MAF_TIMER_RUNNING 0x01
114#define MAF_LAST_REPORTER 0x02
115#define MAF_LOADED 0x04
116#define MAF_NOREPORT 0x08
117#define MAF_GSQUERY 0x10
118
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000119struct ifmcaddr6 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 struct in6_addr mca_addr;
121 struct inet6_dev *idev;
122 struct ifmcaddr6 *next;
123 struct ip6_sf_list *mca_sources;
124 struct ip6_sf_list *mca_tomb;
125 unsigned int mca_sfmode;
Arnaldo Carvalho de Melo246f19d2008-02-03 04:09:17 -0800126 unsigned char mca_crcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 unsigned long mca_sfcount[2];
128 struct timer_list mca_timer;
Eric Dumazet95c96172012-04-15 05:58:06 +0000129 unsigned int mca_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 int mca_users;
Reshetova, Elenad3981bc2017-07-04 09:34:57 +0300131 refcount_t mca_refcnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 spinlock_t mca_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 unsigned long mca_cstamp;
134 unsigned long mca_tstamp;
135};
136
137/* Anycast stuff */
138
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000139struct ipv6_ac_socklist {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 struct in6_addr acl_addr;
141 int acl_ifindex;
142 struct ipv6_ac_socklist *acl_next;
143};
144
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000145struct ifacaddr6 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 struct in6_addr aca_addr;
David Ahern8d1c8022018-04-17 17:33:26 -0700147 struct fib6_info *aca_rt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 struct ifacaddr6 *aca_next;
149 int aca_users;
Reshetova, Elenaaffa78b2017-07-04 09:34:58 +0300150 refcount_t aca_refcnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 unsigned long aca_cstamp;
152 unsigned long aca_tstamp;
153};
154
155#define IFA_HOST IPV6_ADDR_LOOPBACK
156#define IFA_LINK IPV6_ADDR_LINKLOCAL
157#define IFA_SITE IPV6_ADDR_SITELOCAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
159struct ipv6_devstat {
160 struct proc_dir_entry *proc_dir_entry;
YOSHIFUJI Hideakia11d2062006-11-04 20:11:37 +0900161 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
Eric Dumazetbe281e52011-05-19 01:14:23 +0000162 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
163 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164};
165
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000166struct inet6_dev {
stephen hemminger502a2ff2010-03-17 20:31:13 +0000167 struct net_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
stephen hemminger502a2ff2010-03-17 20:31:13 +0000169 struct list_head addr_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
171 struct ifmcaddr6 *mc_list;
172 struct ifmcaddr6 *mc_tomb;
Stephen Hemminger6457d262010-02-17 18:48:44 -0800173 spinlock_t mc_lock;
Daniel Borkmann89225d12013-09-04 00:19:37 +0200174
175 unsigned char mc_qrv; /* Query Robustness Variable */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 unsigned char mc_gq_running;
177 unsigned char mc_ifc_count;
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +0200178 unsigned char mc_dad_count;
Daniel Borkmann89225d12013-09-04 00:19:37 +0200179
180 unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */
181 unsigned long mc_qi; /* Query Interval */
182 unsigned long mc_qri; /* Query Response Interval */
Arnaldo Carvalho de Melo4e7e5cf2008-02-03 04:06:59 -0800183 unsigned long mc_maxdelay;
Daniel Borkmann89225d12013-09-04 00:19:37 +0200184
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 struct timer_list mc_gq_timer; /* general query timer */
186 struct timer_list mc_ifc_timer; /* interface change timer */
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +0200187 struct timer_list mc_dad_timer; /* dad complete mc timer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
189 struct ifacaddr6 *ac_list;
190 rwlock_t lock;
Reshetova, Elena1be92462017-07-04 09:34:55 +0300191 refcount_t refcnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 __u32 if_flags;
193 int dead;
194
Jiri Bohac76506a92016-10-13 18:52:15 +0200195 u32 desync_factor;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 u8 rndid[8];
stephen hemminger372e6c82010-03-17 20:31:09 +0000197 struct list_head tempaddr_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
Daniel Borkmannf53adae2013-04-08 04:01:30 +0000199 struct in6_addr token;
200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 struct neigh_parms *nd_parms;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 struct ipv6_devconf cnf;
203 struct ipv6_devstat stats;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200204
205 struct timer_list rs_timer;
Maciej Żenczykowskibd11f072016-09-27 23:57:58 -0700206 __s32 rs_interval; /* in jiffies */
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200207 __u8 rs_probes;
208
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700210 struct rcu_head rcu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211};
212
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000213static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214{
215 /*
216 * +-------+-------+-------+-------+-------+-------+
217 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 |
218 * +-------+-------+-------+-------+-------+-------+
219 */
220
221 buf[0]= 0x33;
222 buf[1]= 0x33;
223
224 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
225}
226
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
228{
229 buf[0] = 0x00;
230}
231
Rolf Manderscheida9e527e32007-12-10 13:38:41 -0700232static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
233 const unsigned char *broadcast, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234{
Rolf Manderscheida9e527e32007-12-10 13:38:41 -0700235 unsigned char scope = broadcast[5] & 0xF;
236
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 buf[0] = 0; /* Reserved */
238 buf[1] = 0xff; /* Multicast QPN */
239 buf[2] = 0xff;
240 buf[3] = 0xff;
241 buf[4] = 0xff;
Rolf Manderscheida9e527e32007-12-10 13:38:41 -0700242 buf[5] = 0x10 | scope; /* scope from broadcast address */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 buf[6] = 0x60; /* IPv6 signature */
244 buf[7] = 0x1b;
Rolf Manderscheida9e527e32007-12-10 13:38:41 -0700245 buf[8] = broadcast[8]; /* P_Key */
246 buf[9] = broadcast[9];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 memcpy(buf + 10, addr->s6_addr + 6, 10);
248}
Timo Teräs93ca3bb2011-03-28 22:40:53 +0000249
250static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
251 const unsigned char *broadcast, char *buf)
252{
253 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
254 memcpy(buf, broadcast, 4);
255 } else {
256 /* v4mapped? */
257 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
258 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
259 return -EINVAL;
260 memcpy(buf, &addr->s6_addr32[3], 4);
261 }
262 return 0;
263}
264
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265#endif