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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * inet6 interface/address list definitions
4 * Linux INET6 implementation
5 *
6 * Authors:
7 * Pedro Roque <roque@di.fc.ul.pt>
8 */
9
10#ifndef _NET_IF_INET6_H
11#define _NET_IF_INET6_H
12
13#include <net/snmp.h>
14#include <linux/ipv6.h>
15#include <linux/refcount.h>
16
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
23#define IF_READY 0x80000000
24
25enum {
26 INET6_IFADDR_STATE_PREDAD,
27 INET6_IFADDR_STATE_DAD,
28 INET6_IFADDR_STATE_POSTDAD,
29 INET6_IFADDR_STATE_ERRDAD,
30 INET6_IFADDR_STATE_DEAD,
31};
32
33struct inet6_ifaddr {
34 struct in6_addr addr;
35 __u32 prefix_len;
36 __u32 rt_priority;
37
38 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
39 __u32 valid_lft;
40 __u32 prefered_lft;
41 refcount_t refcnt;
42 spinlock_t lock;
43
44 int state;
45
46 __u32 flags;
47 __u8 dad_probes;
48 __u8 stable_privacy_retry;
49
50 __u16 scope;
51 __u64 dad_nonce;
52
53 unsigned long cstamp; /* created timestamp */
54 unsigned long tstamp; /* updated timestamp */
55
56 struct delayed_work dad_work;
57
58 struct inet6_dev *idev;
59 struct fib6_info *rt;
60
61 struct hlist_node addr_lst;
62 struct list_head if_list;
63 /*
64 * Used to safely traverse idev->addr_list in process context
65 * if the idev->lock needed to protect idev->addr_list cannot be held.
66 * In that case, add the items to this list temporarily and iterate
67 * without holding idev->lock.
68 * See addrconf_ifdown and dev_forward_change.
69 */
70 struct list_head if_list_aux;
71
72 struct list_head tmp_list;
73 struct inet6_ifaddr *ifpub;
74 int regen_count;
75
76 bool tokenized;
77
78 u8 ifa_proto;
79
80 struct rcu_head rcu;
81 struct in6_addr peer_addr;
82};
83
84struct ip6_sf_socklist {
85 unsigned int sl_max;
86 unsigned int sl_count;
87 struct rcu_head rcu;
88 struct in6_addr sl_addr[] __counted_by(sl_max);
89};
90
91#define IP6_SFBLOCK 10 /* allocate this many at once */
92
93struct ipv6_mc_socklist {
94 struct in6_addr addr;
95 int ifindex;
96 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
97 struct ipv6_mc_socklist __rcu *next;
98 struct ip6_sf_socklist __rcu *sflist;
99 struct rcu_head rcu;
100};
101
102struct ip6_sf_list {
103 struct ip6_sf_list __rcu *sf_next;
104 struct in6_addr sf_addr;
105 unsigned long sf_count[2]; /* include/exclude counts */
106 unsigned char sf_gsresp; /* include in g & s response? */
107 unsigned char sf_oldin; /* change state */
108 unsigned char sf_crcount; /* retrans. left to send */
109 struct rcu_head rcu;
110};
111
112#define MAF_TIMER_RUNNING 0x01
113#define MAF_LAST_REPORTER 0x02
114#define MAF_LOADED 0x04
115#define MAF_NOREPORT 0x08
116#define MAF_GSQUERY 0x10
117
118struct ifmcaddr6 {
119 struct in6_addr mca_addr;
120 struct inet6_dev *idev;
121 struct ifmcaddr6 __rcu *next;
122 struct ip6_sf_list __rcu *mca_sources;
123 struct ip6_sf_list __rcu *mca_tomb;
124 unsigned int mca_sfmode;
125 unsigned char mca_crcount;
126 unsigned long mca_sfcount[2];
127 struct delayed_work mca_work;
128 unsigned int mca_flags;
129 int mca_users;
130 refcount_t mca_refcnt;
131 unsigned long mca_cstamp;
132 unsigned long mca_tstamp;
133 struct rcu_head rcu;
134};
135
136/* Anycast stuff */
137
138struct ipv6_ac_socklist {
139 struct in6_addr acl_addr;
140 int acl_ifindex;
141 struct ipv6_ac_socklist *acl_next;
142};
143
144struct ifacaddr6 {
145 struct in6_addr aca_addr;
146 struct fib6_info *aca_rt;
147 struct ifacaddr6 __rcu *aca_next;
148 struct hlist_node aca_addr_lst;
149 int aca_users;
150 refcount_t aca_refcnt;
151 unsigned long aca_cstamp;
152 unsigned long aca_tstamp;
153 struct rcu_head rcu;
154};
155
156#define IFA_HOST IPV6_ADDR_LOOPBACK
157#define IFA_LINK IPV6_ADDR_LINKLOCAL
158#define IFA_SITE IPV6_ADDR_SITELOCAL
159
160struct ipv6_devstat {
161 struct proc_dir_entry *proc_dir_entry;
162 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
163 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
164 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
165};
166
167struct inet6_dev {
168 struct net_device *dev;
169 netdevice_tracker dev_tracker;
170
171 struct list_head addr_list;
172
173 struct ifmcaddr6 __rcu *mc_list;
174 struct ifmcaddr6 __rcu *mc_tomb;
175
176 unsigned char mc_qrv; /* Query Robustness Variable */
177 unsigned char mc_gq_running;
178 unsigned char mc_ifc_count;
179 unsigned char mc_dad_count;
180
181 unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */
182 unsigned long mc_qi; /* Query Interval */
183 unsigned long mc_qri; /* Query Response Interval */
184 unsigned long mc_maxdelay;
185
186 struct delayed_work mc_gq_work; /* general query work */
187 struct delayed_work mc_ifc_work; /* interface change work */
188 struct delayed_work mc_dad_work; /* dad complete mc work */
189 struct delayed_work mc_query_work; /* mld query work */
190 struct delayed_work mc_report_work; /* mld report work */
191
192 struct sk_buff_head mc_query_queue; /* mld query queue */
193 struct sk_buff_head mc_report_queue; /* mld report queue */
194
195 spinlock_t mc_query_lock; /* mld query queue lock */
196 spinlock_t mc_report_lock; /* mld query report lock */
197 struct mutex mc_lock; /* mld global lock */
198
199 struct ifacaddr6 __rcu *ac_list;
200 rwlock_t lock;
201 refcount_t refcnt;
202 __u32 if_flags;
203 int dead;
204
205 u32 desync_factor;
206 struct list_head tempaddr_list;
207
208 struct in6_addr token;
209
210 struct neigh_parms *nd_parms;
211 struct ipv6_devconf cnf;
212 struct ipv6_devstat stats;
213
214 struct timer_list rs_timer;
215 __s32 rs_interval; /* in jiffies */
216 __u8 rs_probes;
217
218 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
219 struct rcu_head rcu;
220
221 unsigned int ra_mtu;
222};
223
224static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
225{
226 /*
227 * +-------+-------+-------+-------+-------+-------+
228 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 |
229 * +-------+-------+-------+-------+-------+-------+
230 */
231
232 buf[0]= 0x33;
233 buf[1]= 0x33;
234
235 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
236}
237
238static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
239{
240 buf[0] = 0x00;
241}
242
243static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
244 const unsigned char *broadcast, char *buf)
245{
246 unsigned char scope = broadcast[5] & 0xF;
247
248 buf[0] = 0; /* Reserved */
249 buf[1] = 0xff; /* Multicast QPN */
250 buf[2] = 0xff;
251 buf[3] = 0xff;
252 buf[4] = 0xff;
253 buf[5] = 0x10 | scope; /* scope from broadcast address */
254 buf[6] = 0x60; /* IPv6 signature */
255 buf[7] = 0x1b;
256 buf[8] = broadcast[8]; /* P_Key */
257 buf[9] = broadcast[9];
258 memcpy(buf + 10, addr->s6_addr + 6, 10);
259}
260
261static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
262 const unsigned char *broadcast, char *buf)
263{
264 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
265 memcpy(buf, broadcast, 4);
266 } else {
267 /* v4mapped? */
268 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
269 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
270 return -EINVAL;
271 memcpy(buf, &addr->s6_addr32[3], 4);
272 }
273 return 0;
274}
275
276#endif
1/*
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>
20
21/* inet6_dev.if_flags */
22
23#define IF_RA_OTHERCONF 0x80
24#define IF_RA_MANAGED 0x40
25#define IF_RA_RCVD 0x20
26#define IF_RS_SENT 0x10
27#define IF_READY 0x80000000
28
29/* prefix flags */
30#define IF_PREFIX_ONLINK 0x01
31#define IF_PREFIX_AUTOCONF 0x02
32
33enum {
34 INET6_IFADDR_STATE_DAD,
35 INET6_IFADDR_STATE_POSTDAD,
36 INET6_IFADDR_STATE_UP,
37 INET6_IFADDR_STATE_DEAD,
38};
39
40struct inet6_ifaddr {
41 struct in6_addr addr;
42 __u32 prefix_len;
43
44 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
45 __u32 valid_lft;
46 __u32 prefered_lft;
47 atomic_t refcnt;
48 spinlock_t lock;
49 spinlock_t state_lock;
50
51 int state;
52
53 __u8 probes;
54 __u8 flags;
55
56 __u16 scope;
57
58 unsigned long cstamp; /* created timestamp */
59 unsigned long tstamp; /* updated timestamp */
60
61 struct timer_list timer;
62
63 struct inet6_dev *idev;
64 struct rt6_info *rt;
65
66 struct hlist_node addr_lst;
67 struct list_head if_list;
68
69#ifdef CONFIG_IPV6_PRIVACY
70 struct list_head tmp_list;
71 struct inet6_ifaddr *ifpub;
72 int regen_count;
73#endif
74 struct rcu_head rcu;
75};
76
77struct ip6_sf_socklist {
78 unsigned int sl_max;
79 unsigned int sl_count;
80 struct in6_addr sl_addr[0];
81};
82
83#define IP6_SFLSIZE(count) (sizeof(struct ip6_sf_socklist) + \
84 (count) * sizeof(struct in6_addr))
85
86#define IP6_SFBLOCK 10 /* allocate this many at once */
87
88struct ipv6_mc_socklist {
89 struct in6_addr addr;
90 int ifindex;
91 struct ipv6_mc_socklist __rcu *next;
92 rwlock_t sflock;
93 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
94 struct ip6_sf_socklist *sflist;
95 struct rcu_head rcu;
96};
97
98struct ip6_sf_list {
99 struct ip6_sf_list *sf_next;
100 struct in6_addr sf_addr;
101 unsigned long sf_count[2]; /* include/exclude counts */
102 unsigned char sf_gsresp; /* include in g & s response? */
103 unsigned char sf_oldin; /* change state */
104 unsigned char sf_crcount; /* retrans. left to send */
105};
106
107#define MAF_TIMER_RUNNING 0x01
108#define MAF_LAST_REPORTER 0x02
109#define MAF_LOADED 0x04
110#define MAF_NOREPORT 0x08
111#define MAF_GSQUERY 0x10
112
113struct ifmcaddr6 {
114 struct in6_addr mca_addr;
115 struct inet6_dev *idev;
116 struct ifmcaddr6 *next;
117 struct ip6_sf_list *mca_sources;
118 struct ip6_sf_list *mca_tomb;
119 unsigned int mca_sfmode;
120 unsigned char mca_crcount;
121 unsigned long mca_sfcount[2];
122 struct timer_list mca_timer;
123 unsigned int mca_flags;
124 int mca_users;
125 atomic_t mca_refcnt;
126 spinlock_t mca_lock;
127 unsigned long mca_cstamp;
128 unsigned long mca_tstamp;
129};
130
131/* Anycast stuff */
132
133struct ipv6_ac_socklist {
134 struct in6_addr acl_addr;
135 int acl_ifindex;
136 struct ipv6_ac_socklist *acl_next;
137};
138
139struct ifacaddr6 {
140 struct in6_addr aca_addr;
141 struct inet6_dev *aca_idev;
142 struct rt6_info *aca_rt;
143 struct ifacaddr6 *aca_next;
144 int aca_users;
145 atomic_t aca_refcnt;
146 spinlock_t aca_lock;
147 unsigned long aca_cstamp;
148 unsigned long aca_tstamp;
149};
150
151#define IFA_HOST IPV6_ADDR_LOOPBACK
152#define IFA_LINK IPV6_ADDR_LINKLOCAL
153#define IFA_SITE IPV6_ADDR_SITELOCAL
154
155struct ipv6_devstat {
156 struct proc_dir_entry *proc_dir_entry;
157 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
158 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
159 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
160};
161
162struct inet6_dev {
163 struct net_device *dev;
164
165 struct list_head addr_list;
166
167 struct ifmcaddr6 *mc_list;
168 struct ifmcaddr6 *mc_tomb;
169 spinlock_t mc_lock;
170 unsigned char mc_qrv;
171 unsigned char mc_gq_running;
172 unsigned char mc_ifc_count;
173 unsigned long mc_v1_seen;
174 unsigned long mc_maxdelay;
175 struct timer_list mc_gq_timer; /* general query timer */
176 struct timer_list mc_ifc_timer; /* interface change timer */
177
178 struct ifacaddr6 *ac_list;
179 rwlock_t lock;
180 atomic_t refcnt;
181 __u32 if_flags;
182 int dead;
183
184#ifdef CONFIG_IPV6_PRIVACY
185 u8 rndid[8];
186 struct timer_list regen_timer;
187 struct list_head tempaddr_list;
188#endif
189
190 struct neigh_parms *nd_parms;
191 struct inet6_dev *next;
192 struct ipv6_devconf cnf;
193 struct ipv6_devstat stats;
194 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
195 struct rcu_head rcu;
196};
197
198static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
199{
200 /*
201 * +-------+-------+-------+-------+-------+-------+
202 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 |
203 * +-------+-------+-------+-------+-------+-------+
204 */
205
206 buf[0]= 0x33;
207 buf[1]= 0x33;
208
209 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
210}
211
212static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
213{
214 buf[0] = 0x00;
215}
216
217static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
218 const unsigned char *broadcast, char *buf)
219{
220 unsigned char scope = broadcast[5] & 0xF;
221
222 buf[0] = 0; /* Reserved */
223 buf[1] = 0xff; /* Multicast QPN */
224 buf[2] = 0xff;
225 buf[3] = 0xff;
226 buf[4] = 0xff;
227 buf[5] = 0x10 | scope; /* scope from broadcast address */
228 buf[6] = 0x60; /* IPv6 signature */
229 buf[7] = 0x1b;
230 buf[8] = broadcast[8]; /* P_Key */
231 buf[9] = broadcast[9];
232 memcpy(buf + 10, addr->s6_addr + 6, 10);
233}
234
235static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
236 const unsigned char *broadcast, char *buf)
237{
238 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
239 memcpy(buf, broadcast, 4);
240 } else {
241 /* v4mapped? */
242 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
243 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
244 return -EINVAL;
245 memcpy(buf, &addr->s6_addr32[3], 4);
246 }
247 return 0;
248}
249
250#endif