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
29 enum {
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
37 struct 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 struct rcu_head rcu;
83 struct in6_addr peer_addr;
84 };
85
86 struct ip6_sf_socklist {
87 unsigned int sl_max;
88 unsigned int sl_count;
89 struct in6_addr sl_addr[];
90 };
91
92 #define IP6_SFLSIZE(count) (sizeof(struct ip6_sf_socklist) + \
93 (count) * sizeof(struct in6_addr))
94
95 #define IP6_SFBLOCK 10 /* allocate this many at once */
96
97 struct 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 rwlock_t sflock;
103 struct ip6_sf_socklist *sflist;
104 struct rcu_head rcu;
105 };
106
107 struct ip6_sf_list {
108 struct ip6_sf_list *sf_next;
109 struct in6_addr sf_addr;
110 unsigned long sf_count[2]; /* include/exclude counts */
111 unsigned char sf_gsresp; /* include in g & s response? */
112 unsigned char sf_oldin; /* change state */
113 unsigned char sf_crcount; /* retrans. left to send */
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
122 struct ifmcaddr6 {
123 struct in6_addr mca_addr;
124 struct inet6_dev *idev;
125 struct ifmcaddr6 *next;
126 struct ip6_sf_list *mca_sources;
127 struct ip6_sf_list *mca_tomb;
128 unsigned int mca_sfmode;
129 unsigned char mca_crcount;
130 unsigned long mca_sfcount[2];
131 struct timer_list mca_timer;
132 unsigned int mca_flags;
133 int mca_users;
134 refcount_t mca_refcnt;
135 spinlock_t mca_lock;
136 unsigned long mca_cstamp;
137 unsigned long mca_tstamp;
138 };
139
140 /* Anycast stuff */
141
142 struct ipv6_ac_socklist {
143 struct in6_addr acl_addr;
144 int acl_ifindex;
145 struct ipv6_ac_socklist *acl_next;
146 };
147
148 struct 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
164 struct 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
171 struct inet6_dev {
172 struct net_device *dev;
173
174 struct list_head addr_list;
175
176 struct ifmcaddr6 *mc_list;
177 struct ifmcaddr6 *mc_tomb;
178 spinlock_t mc_lock;
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 timer_list mc_gq_timer; /* general query timer */
191 struct timer_list mc_ifc_timer; /* interface change timer */
192 struct timer_list mc_dad_timer; /* dad complete mc timer */
193
194 struct ifacaddr6 *ac_list;
195 rwlock_t lock;
196 refcount_t refcnt;
197 __u32 if_flags;
198 int dead;
199
200 u32 desync_factor;
201 struct list_head tempaddr_list;
202
203 struct in6_addr token;
204
205 struct neigh_parms *nd_parms;
206 struct ipv6_devconf cnf;
207 struct ipv6_devstat stats;
208
209 struct timer_list rs_timer;
210 __s32 rs_interval; /* in jiffies */
211 __u8 rs_probes;
212
213 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
214 struct rcu_head rcu;
215 };
216
ipv6_eth_mc_map(const struct in6_addr * addr,char * buf)217 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
218 {
219 /*
220 * +-------+-------+-------+-------+-------+-------+
221 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 |
222 * +-------+-------+-------+-------+-------+-------+
223 */
224
225 buf[0]= 0x33;
226 buf[1]= 0x33;
227
228 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
229 }
230
ipv6_arcnet_mc_map(const struct in6_addr * addr,char * buf)231 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
232 {
233 buf[0] = 0x00;
234 }
235
ipv6_ib_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)236 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
237 const unsigned char *broadcast, char *buf)
238 {
239 unsigned char scope = broadcast[5] & 0xF;
240
241 buf[0] = 0; /* Reserved */
242 buf[1] = 0xff; /* Multicast QPN */
243 buf[2] = 0xff;
244 buf[3] = 0xff;
245 buf[4] = 0xff;
246 buf[5] = 0x10 | scope; /* scope from broadcast address */
247 buf[6] = 0x60; /* IPv6 signature */
248 buf[7] = 0x1b;
249 buf[8] = broadcast[8]; /* P_Key */
250 buf[9] = broadcast[9];
251 memcpy(buf + 10, addr->s6_addr + 6, 10);
252 }
253
ipv6_ipgre_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)254 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
255 const unsigned char *broadcast, char *buf)
256 {
257 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
258 memcpy(buf, broadcast, 4);
259 } else {
260 /* v4mapped? */
261 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
262 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
263 return -EINVAL;
264 memcpy(buf, &addr->s6_addr32[3], 4);
265 }
266 return 0;
267 }
268
269 #endif
270