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
25/* prefix flags */
26#define IF_PREFIX_ONLINK 0x01
27#define IF_PREFIX_AUTOCONF 0x02
28
29enum {
30 INET6_IFADDR_STATE_PREDAD,
31 INET6_IFADDR_STATE_DAD,
32 INET6_IFADDR_STATE_POSTDAD,
33 INET6_IFADDR_STATE_ERRDAD,
34 INET6_IFADDR_STATE_DEAD,
35};
36
37struct inet6_ifaddr {
38 struct in6_addr addr;
39 __u32 prefix_len;
40 __u32 rt_priority;
41
42 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
43 __u32 valid_lft;
44 __u32 prefered_lft;
45 refcount_t refcnt;
46 spinlock_t lock;
47
48 int state;
49
50 __u32 flags;
51 __u8 dad_probes;
52 __u8 stable_privacy_retry;
53
54 __u16 scope;
55 __u64 dad_nonce;
56
57 unsigned long cstamp; /* created timestamp */
58 unsigned long tstamp; /* updated timestamp */
59
60 struct delayed_work dad_work;
61
62 struct inet6_dev *idev;
63 struct fib6_info *rt;
64
65 struct hlist_node addr_lst;
66 struct list_head if_list;
67 /*
68 * Used to safely traverse idev->addr_list in process context
69 * if the idev->lock needed to protect idev->addr_list cannot be held.
70 * In that case, add the items to this list temporarily and iterate
71 * without holding idev->lock.
72 * See addrconf_ifdown and dev_forward_change.
73 */
74 struct list_head if_list_aux;
75
76 struct list_head tmp_list;
77 struct inet6_ifaddr *ifpub;
78 int regen_count;
79
80 bool tokenized;
81
82 u8 ifa_proto;
83
84 struct rcu_head rcu;
85 struct in6_addr peer_addr;
86};
87
88struct ip6_sf_socklist {
89 unsigned int sl_max;
90 unsigned int sl_count;
91 struct rcu_head rcu;
92 struct in6_addr sl_addr[];
93};
94
95#define IP6_SFBLOCK 10 /* allocate this many at once */
96
97struct ipv6_mc_socklist {
98 struct in6_addr addr;
99 int ifindex;
100 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
101 struct ipv6_mc_socklist __rcu *next;
102 struct ip6_sf_socklist __rcu *sflist;
103 struct rcu_head rcu;
104};
105
106struct ip6_sf_list {
107 struct ip6_sf_list __rcu *sf_next;
108 struct in6_addr sf_addr;
109 unsigned long sf_count[2]; /* include/exclude counts */
110 unsigned char sf_gsresp; /* include in g & s response? */
111 unsigned char sf_oldin; /* change state */
112 unsigned char sf_crcount; /* retrans. left to send */
113 struct rcu_head rcu;
114};
115
116#define MAF_TIMER_RUNNING 0x01
117#define MAF_LAST_REPORTER 0x02
118#define MAF_LOADED 0x04
119#define MAF_NOREPORT 0x08
120#define MAF_GSQUERY 0x10
121
122struct ifmcaddr6 {
123 struct in6_addr mca_addr;
124 struct inet6_dev *idev;
125 struct ifmcaddr6 __rcu *next;
126 struct ip6_sf_list __rcu *mca_sources;
127 struct ip6_sf_list __rcu *mca_tomb;
128 unsigned int mca_sfmode;
129 unsigned char mca_crcount;
130 unsigned long mca_sfcount[2];
131 struct delayed_work mca_work;
132 unsigned int mca_flags;
133 int mca_users;
134 refcount_t mca_refcnt;
135 unsigned long mca_cstamp;
136 unsigned long mca_tstamp;
137 struct rcu_head rcu;
138};
139
140/* Anycast stuff */
141
142struct ipv6_ac_socklist {
143 struct in6_addr acl_addr;
144 int acl_ifindex;
145 struct ipv6_ac_socklist *acl_next;
146};
147
148struct ifacaddr6 {
149 struct in6_addr aca_addr;
150 struct fib6_info *aca_rt;
151 struct ifacaddr6 *aca_next;
152 struct hlist_node aca_addr_lst;
153 int aca_users;
154 refcount_t aca_refcnt;
155 unsigned long aca_cstamp;
156 unsigned long aca_tstamp;
157 struct rcu_head rcu;
158};
159
160#define IFA_HOST IPV6_ADDR_LOOPBACK
161#define IFA_LINK IPV6_ADDR_LINKLOCAL
162#define IFA_SITE IPV6_ADDR_SITELOCAL
163
164struct ipv6_devstat {
165 struct proc_dir_entry *proc_dir_entry;
166 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
167 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
168 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
169};
170
171struct inet6_dev {
172 struct net_device *dev;
173 netdevice_tracker dev_tracker;
174
175 struct list_head addr_list;
176
177 struct ifmcaddr6 __rcu *mc_list;
178 struct ifmcaddr6 __rcu *mc_tomb;
179
180 unsigned char mc_qrv; /* Query Robustness Variable */
181 unsigned char mc_gq_running;
182 unsigned char mc_ifc_count;
183 unsigned char mc_dad_count;
184
185 unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */
186 unsigned long mc_qi; /* Query Interval */
187 unsigned long mc_qri; /* Query Response Interval */
188 unsigned long mc_maxdelay;
189
190 struct delayed_work mc_gq_work; /* general query work */
191 struct delayed_work mc_ifc_work; /* interface change work */
192 struct delayed_work mc_dad_work; /* dad complete mc work */
193 struct delayed_work mc_query_work; /* mld query work */
194 struct delayed_work mc_report_work; /* mld report work */
195
196 struct sk_buff_head mc_query_queue; /* mld query queue */
197 struct sk_buff_head mc_report_queue; /* mld report queue */
198
199 spinlock_t mc_query_lock; /* mld query queue lock */
200 spinlock_t mc_report_lock; /* mld query report lock */
201 struct mutex mc_lock; /* mld global lock */
202
203 struct ifacaddr6 *ac_list;
204 rwlock_t lock;
205 refcount_t refcnt;
206 __u32 if_flags;
207 int dead;
208
209 u32 desync_factor;
210 struct list_head tempaddr_list;
211
212 struct in6_addr token;
213
214 struct neigh_parms *nd_parms;
215 struct ipv6_devconf cnf;
216 struct ipv6_devstat stats;
217
218 struct timer_list rs_timer;
219 __s32 rs_interval; /* in jiffies */
220 __u8 rs_probes;
221
222 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
223 struct rcu_head rcu;
224
225 unsigned int ra_mtu;
226};
227
228static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
229{
230 /*
231 * +-------+-------+-------+-------+-------+-------+
232 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 |
233 * +-------+-------+-------+-------+-------+-------+
234 */
235
236 buf[0]= 0x33;
237 buf[1]= 0x33;
238
239 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
240}
241
242static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
243{
244 buf[0] = 0x00;
245}
246
247static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
248 const unsigned char *broadcast, char *buf)
249{
250 unsigned char scope = broadcast[5] & 0xF;
251
252 buf[0] = 0; /* Reserved */
253 buf[1] = 0xff; /* Multicast QPN */
254 buf[2] = 0xff;
255 buf[3] = 0xff;
256 buf[4] = 0xff;
257 buf[5] = 0x10 | scope; /* scope from broadcast address */
258 buf[6] = 0x60; /* IPv6 signature */
259 buf[7] = 0x1b;
260 buf[8] = broadcast[8]; /* P_Key */
261 buf[9] = broadcast[9];
262 memcpy(buf + 10, addr->s6_addr + 6, 10);
263}
264
265static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
266 const unsigned char *broadcast, char *buf)
267{
268 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
269 memcpy(buf, broadcast, 4);
270 } else {
271 /* v4mapped? */
272 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
273 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
274 return -EINVAL;
275 memcpy(buf, &addr->s6_addr32[3], 4);
276 }
277 return 0;
278}
279
280#endif
281

source code of linux/include/net/if_inet6.h