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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 <[email protected]>
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
91struct ipv6_mc_socklist {
92 struct in6_addr addr;
93 int ifindex;
94 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
95 struct ipv6_mc_socklist __rcu *next;
96 struct ip6_sf_socklist __rcu *sflist;
97 struct rcu_head rcu;
98};
99
100struct ip6_sf_list {
101 struct ip6_sf_list __rcu *sf_next;
102 struct in6_addr sf_addr;
103 unsigned long sf_count[2]; /* include/exclude counts */
104 unsigned char sf_gsresp; /* include in g & s response? */
105 unsigned char sf_oldin; /* change state */
106 unsigned char sf_crcount; /* retrans. left to send */
107 struct rcu_head rcu;
108};
109
110#define MAF_TIMER_RUNNING 0x01
111#define MAF_LAST_REPORTER 0x02
112#define MAF_LOADED 0x04
113#define MAF_NOREPORT 0x08
114#define MAF_GSQUERY 0x10
115
116struct ifmcaddr6 {
117 struct in6_addr mca_addr;
118 struct inet6_dev *idev;
119 struct ifmcaddr6 __rcu *next;
120 struct ip6_sf_list __rcu *mca_sources;
121 struct ip6_sf_list __rcu *mca_tomb;
122 unsigned int mca_sfmode;
123 unsigned char mca_crcount;
124 unsigned long mca_sfcount[2];
125 struct delayed_work mca_work;
126 unsigned int mca_flags;
127 int mca_users;
128 refcount_t mca_refcnt;
129 unsigned long mca_cstamp;
130 unsigned long mca_tstamp;
131 struct rcu_head rcu;
132};
133
134/* Anycast stuff */
135
136struct ipv6_ac_socklist {
137 struct in6_addr acl_addr;
138 int acl_ifindex;
139 struct ipv6_ac_socklist *acl_next;
140};
141
142struct ifacaddr6 {
143 struct in6_addr aca_addr;
144 struct fib6_info *aca_rt;
145 struct ifacaddr6 __rcu *aca_next;
146 struct hlist_node aca_addr_lst;
147 int aca_users;
148 refcount_t aca_refcnt;
149 unsigned long aca_cstamp;
150 unsigned long aca_tstamp;
151 struct rcu_head rcu;
152};
153
154#define IFA_HOST IPV6_ADDR_LOOPBACK
155#define IFA_LINK IPV6_ADDR_LINKLOCAL
156#define IFA_SITE IPV6_ADDR_SITELOCAL
157
158struct ipv6_devstat {
159 struct proc_dir_entry *proc_dir_entry;
160 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
161 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
162 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
163};
164
165struct inet6_dev {
166 struct net_device *dev;
167 netdevice_tracker dev_tracker;
168
169 struct list_head addr_list;
170
171 struct ifmcaddr6 __rcu *mc_list;
172 struct ifmcaddr6 __rcu *mc_tomb;
173
174 unsigned char mc_qrv; /* Query Robustness Variable */
175 unsigned char mc_gq_running;
176 unsigned char mc_ifc_count;
177 unsigned char mc_dad_count;
178
179 unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */
180 unsigned long mc_qi; /* Query Interval */
181 unsigned long mc_qri; /* Query Response Interval */
182 unsigned long mc_maxdelay;
183
184 struct delayed_work mc_gq_work; /* general query work */
185 struct delayed_work mc_ifc_work; /* interface change work */
186 struct delayed_work mc_dad_work; /* dad complete mc work */
187 struct delayed_work mc_query_work; /* mld query work */
188 struct delayed_work mc_report_work; /* mld report work */
189
190 struct sk_buff_head mc_query_queue; /* mld query queue */
191 struct sk_buff_head mc_report_queue; /* mld report queue */
192
193 spinlock_t mc_query_lock; /* mld query queue lock */
194 spinlock_t mc_report_lock; /* mld query report lock */
195 struct mutex mc_lock; /* mld global lock */
196
197 struct ifacaddr6 __rcu *ac_list;
198 rwlock_t lock;
199 refcount_t refcnt;
200 __u32 if_flags;
201 int dead;
202
203 u32 desync_factor;
204 struct list_head tempaddr_list;
205
206 struct in6_addr token;
207
208 struct neigh_parms *nd_parms;
209 struct ipv6_devconf cnf;
210 struct ipv6_devstat stats;
211
212 struct timer_list rs_timer;
213 __s32 rs_interval; /* in jiffies */
214 __u8 rs_probes;
215
216 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
217 struct rcu_head rcu;
218
219 unsigned int ra_mtu;
220};
221
222static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
223{
224 /*
225 * +-------+-------+-------+-------+-------+-------+
226 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 |
227 * +-------+-------+-------+-------+-------+-------+
228 */
229
230 buf[0]= 0x33;
231 buf[1]= 0x33;
232
233 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
234}
235
236static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
237{
238 buf[0] = 0x00;
239}
240
241static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
242 const unsigned char *broadcast, char *buf)
243{
244 unsigned char scope = broadcast[5] & 0xF;
245
246 buf[0] = 0; /* Reserved */
247 buf[1] = 0xff; /* Multicast QPN */
248 buf[2] = 0xff;
249 buf[3] = 0xff;
250 buf[4] = 0xff;
251 buf[5] = 0x10 | scope; /* scope from broadcast address */
252 buf[6] = 0x60; /* IPv6 signature */
253 buf[7] = 0x1b;
254 buf[8] = broadcast[8]; /* P_Key */
255 buf[9] = broadcast[9];
256 memcpy(buf + 10, addr->s6_addr + 6, 10);
257}
258
259static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
260 const unsigned char *broadcast, char *buf)
261{
262 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
263 memcpy(buf, broadcast, 4);
264 } else {
265 /* v4mapped? */
266 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
267 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
268 return -EINVAL;
269 memcpy(buf, &addr->s6_addr32[3], 4);
270 }
271 return 0;
272}
273
274#endif