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Thomas Gleixner2874c5f2019-05-27 08:55:01 +02001/* SPDX-License-Identifier: GPL-2.0-or-later */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002/*
3 * inet6 interface/address list definitions
4 * Linux INET6 implementation
5 *
6 * Authors:
7 * Pedro Roque <roque@di.fc.ul.pt>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 */
9
10#ifndef _NET_IF_INET6_H
11#define _NET_IF_INET6_H
12
13#include <net/snmp.h>
14#include <linux/ipv6.h>
Reshetova, Elena1be92462017-07-04 09:34:55 +030015#include <linux/refcount.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
17/* inet6_dev.if_flags */
18
19#define IF_RA_OTHERCONF 0x80
20#define IF_RA_MANAGED 0x40
21#define IF_RA_RCVD 0x20
22#define IF_RS_SENT 0x10
YOSHIFUJI Hideaki3c21edb2005-12-21 22:57:24 +090023#define IF_READY 0x80000000
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
25/* prefix flags */
26#define IF_PREFIX_ONLINK 0x01
27#define IF_PREFIX_AUTOCONF 0x02
28
Herbert Xue9d3e082010-05-18 15:36:06 -070029enum {
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +010030 INET6_IFADDR_STATE_PREDAD,
Herbert Xue9d3e082010-05-18 15:36:06 -070031 INET6_IFADDR_STATE_DAD,
32 INET6_IFADDR_STATE_POSTDAD,
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +010033 INET6_IFADDR_STATE_ERRDAD,
Herbert Xue9d3e082010-05-18 15:36:06 -070034 INET6_IFADDR_STATE_DEAD,
35};
36
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +000037struct inet6_ifaddr {
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 struct in6_addr addr;
39 __u32 prefix_len;
David Ahern8308f3f2018-05-27 08:09:58 -070040 __u32 rt_priority;
Hannes Frederic Sowa8e8e6762015-03-23 23:36:03 +010041
Lorenzo Colitti76f793e2011-07-26 13:50:49 +000042 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 __u32 valid_lft;
44 __u32 prefered_lft;
Reshetova, Elena271201c2017-07-04 09:34:56 +030045 refcount_t refcnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 spinlock_t lock;
Herbert Xue9d3e082010-05-18 15:36:06 -070047
48 int state;
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Jiri Pirko479840f2013-12-06 09:45:21 +010050 __u32 flags;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +020051 __u8 dad_probes;
Hannes Frederic Sowa5f40ef72015-03-23 23:36:04 +010052 __u8 stable_privacy_retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
54 __u16 scope;
Erik Nordmarkadc176c2016-12-02 14:00:08 -080055 __u64 dad_nonce;
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
Richard Kennedy04ec5cf2009-03-21 13:29:05 -070057 unsigned long cstamp; /* created timestamp */
58 unsigned long tstamp; /* updated timestamp */
59
Hannes Frederic Sowac15b1cc2014-03-27 18:28:07 +010060 struct delayed_work dad_work;
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
62 struct inet6_dev *idev;
David Ahern8d1c8022018-04-17 17:33:26 -070063 struct fib6_info *rt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
stephen hemmingerc2e21292010-03-17 20:31:10 +000065 struct hlist_node addr_lst;
stephen hemminger502a2ff2010-03-17 20:31:13 +000066 struct list_head if_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
stephen hemminger372e6c82010-03-17 20:31:09 +000068 struct list_head tmp_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 struct inet6_ifaddr *ifpub;
70 int regen_count;
David S. Miller5d9efa72013-10-28 20:07:50 -040071
Daniel Borkmann617fe292013-04-09 03:47:16 +000072 bool tokenized;
73
stephen hemminger5c578aed2010-03-17 20:31:11 +000074 struct rcu_head rcu;
Nicolas Dichtelcaeaba72013-05-16 22:32:00 +000075 struct in6_addr peer_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070076};
77
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +000078struct ip6_sf_socklist {
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 unsigned int sl_max;
80 unsigned int sl_count;
Gustavo A. R. Silva0fa39d62020-05-07 14:02:16 -050081 struct in6_addr sl_addr[];
Linus Torvalds1da177e2005-04-16 15:20:36 -070082};
83
84#define IP6_SFLSIZE(count) (sizeof(struct ip6_sf_socklist) + \
85 (count) * sizeof(struct in6_addr))
86
87#define IP6_SFBLOCK 10 /* allocate this many at once */
88
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +000089struct ipv6_mc_socklist {
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 struct in6_addr addr;
91 int ifindex;
Eric Dumazet14105c12019-08-27 00:08:12 -070092 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
Eric Dumazet456b61b2010-11-23 13:12:15 +000093 struct ipv6_mc_socklist __rcu *next;
David L Stevens5ab4a6c2005-12-27 14:03:00 -080094 rwlock_t sflock;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 struct ip6_sf_socklist *sflist;
Eric Dumazet456b61b2010-11-23 13:12:15 +000096 struct rcu_head rcu;
Linus Torvalds1da177e2005-04-16 15:20:36 -070097};
98
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +000099struct ip6_sf_list {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 struct ip6_sf_list *sf_next;
101 struct in6_addr sf_addr;
102 unsigned long sf_count[2]; /* include/exclude counts */
103 unsigned char sf_gsresp; /* include in g & s response? */
104 unsigned char sf_oldin; /* change state */
105 unsigned char sf_crcount; /* retrans. left to send */
106};
107
108#define MAF_TIMER_RUNNING 0x01
109#define MAF_LAST_REPORTER 0x02
110#define MAF_LOADED 0x04
111#define MAF_NOREPORT 0x08
112#define MAF_GSQUERY 0x10
113
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000114struct ifmcaddr6 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 struct in6_addr mca_addr;
116 struct inet6_dev *idev;
117 struct ifmcaddr6 *next;
118 struct ip6_sf_list *mca_sources;
119 struct ip6_sf_list *mca_tomb;
120 unsigned int mca_sfmode;
Arnaldo Carvalho de Melo246f19d2008-02-03 04:09:17 -0800121 unsigned char mca_crcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 unsigned long mca_sfcount[2];
123 struct timer_list mca_timer;
Eric Dumazet95c96172012-04-15 05:58:06 +0000124 unsigned int mca_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 int mca_users;
Reshetova, Elenad3981bc2017-07-04 09:34:57 +0300126 refcount_t mca_refcnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 spinlock_t mca_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 unsigned long mca_cstamp;
129 unsigned long mca_tstamp;
130};
131
132/* Anycast stuff */
133
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000134struct ipv6_ac_socklist {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 struct in6_addr acl_addr;
136 int acl_ifindex;
137 struct ipv6_ac_socklist *acl_next;
138};
139
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000140struct ifacaddr6 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 struct in6_addr aca_addr;
David Ahern8d1c8022018-04-17 17:33:26 -0700142 struct fib6_info *aca_rt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 struct ifacaddr6 *aca_next;
Jeff Barnhill2384d022018-11-02 20:23:57 +0000144 struct hlist_node aca_addr_lst;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 int aca_users;
Reshetova, Elenaaffa78b2017-07-04 09:34:58 +0300146 refcount_t aca_refcnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 unsigned long aca_cstamp;
148 unsigned long aca_tstamp;
Jeff Barnhill2384d022018-11-02 20:23:57 +0000149 struct rcu_head rcu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150};
151
152#define IFA_HOST IPV6_ADDR_LOOPBACK
153#define IFA_LINK IPV6_ADDR_LINKLOCAL
154#define IFA_SITE IPV6_ADDR_SITELOCAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156struct ipv6_devstat {
157 struct proc_dir_entry *proc_dir_entry;
YOSHIFUJI Hideakia11d2062006-11-04 20:11:37 +0900158 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
Eric Dumazetbe281e52011-05-19 01:14:23 +0000159 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
160 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161};
162
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000163struct inet6_dev {
stephen hemminger502a2ff2010-03-17 20:31:13 +0000164 struct net_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
stephen hemminger502a2ff2010-03-17 20:31:13 +0000166 struct list_head addr_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
168 struct ifmcaddr6 *mc_list;
169 struct ifmcaddr6 *mc_tomb;
Stephen Hemminger6457d262010-02-17 18:48:44 -0800170 spinlock_t mc_lock;
Daniel Borkmann89225d12013-09-04 00:19:37 +0200171
172 unsigned char mc_qrv; /* Query Robustness Variable */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 unsigned char mc_gq_running;
174 unsigned char mc_ifc_count;
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +0200175 unsigned char mc_dad_count;
Daniel Borkmann89225d12013-09-04 00:19:37 +0200176
177 unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */
178 unsigned long mc_qi; /* Query Interval */
179 unsigned long mc_qri; /* Query Response Interval */
Arnaldo Carvalho de Melo4e7e5cf2008-02-03 04:06:59 -0800180 unsigned long mc_maxdelay;
Daniel Borkmann89225d12013-09-04 00:19:37 +0200181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 struct timer_list mc_gq_timer; /* general query timer */
183 struct timer_list mc_ifc_timer; /* interface change timer */
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +0200184 struct timer_list mc_dad_timer; /* dad complete mc timer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
186 struct ifacaddr6 *ac_list;
187 rwlock_t lock;
Reshetova, Elena1be92462017-07-04 09:34:55 +0300188 refcount_t refcnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 __u32 if_flags;
190 int dead;
191
Jiri Bohac76506a92016-10-13 18:52:15 +0200192 u32 desync_factor;
stephen hemminger372e6c82010-03-17 20:31:09 +0000193 struct list_head tempaddr_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194
Daniel Borkmannf53adae2013-04-08 04:01:30 +0000195 struct in6_addr token;
196
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 struct neigh_parms *nd_parms;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 struct ipv6_devconf cnf;
199 struct ipv6_devstat stats;
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200200
201 struct timer_list rs_timer;
Maciej Żenczykowskibd11f072016-09-27 23:57:58 -0700202 __s32 rs_interval; /* in jiffies */
Hannes Frederic Sowab7b1bfc2013-06-23 18:39:01 +0200203 __u8 rs_probes;
204
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
YOSHIFUJI Hideaki8814c4b2006-09-22 14:44:24 -0700206 struct rcu_head rcu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207};
208
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000209static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210{
211 /*
212 * +-------+-------+-------+-------+-------+-------+
213 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 |
214 * +-------+-------+-------+-------+-------+-------+
215 */
216
217 buf[0]= 0x33;
218 buf[1]= 0x33;
219
220 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
221}
222
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
224{
225 buf[0] = 0x00;
226}
227
Rolf Manderscheida9e527e32007-12-10 13:38:41 -0700228static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
229 const unsigned char *broadcast, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230{
Rolf Manderscheida9e527e32007-12-10 13:38:41 -0700231 unsigned char scope = broadcast[5] & 0xF;
232
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 buf[0] = 0; /* Reserved */
234 buf[1] = 0xff; /* Multicast QPN */
235 buf[2] = 0xff;
236 buf[3] = 0xff;
237 buf[4] = 0xff;
Rolf Manderscheida9e527e32007-12-10 13:38:41 -0700238 buf[5] = 0x10 | scope; /* scope from broadcast address */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 buf[6] = 0x60; /* IPv6 signature */
240 buf[7] = 0x1b;
Rolf Manderscheida9e527e32007-12-10 13:38:41 -0700241 buf[8] = broadcast[8]; /* P_Key */
242 buf[9] = broadcast[9];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 memcpy(buf + 10, addr->s6_addr + 6, 10);
244}
Timo Teräs93ca3bb2011-03-28 22:40:53 +0000245
246static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
247 const unsigned char *broadcast, char *buf)
248{
249 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
250 memcpy(buf, broadcast, 4);
251 } else {
252 /* v4mapped? */
253 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
254 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
255 return -EINVAL;
256 memcpy(buf, &addr->s6_addr32[3], 4);
257 }
258 return 0;
259}
260
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261#endif