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 struct list_head tmp_list;
69 struct inet6_ifaddr *ifpub;
70 int regen_count;
71
72 bool tokenized;
73
74 struct rcu_head rcu;
75 struct in6_addr peer_addr;
76 };
77
78 struct ip6_sf_socklist {
79 unsigned int sl_max;
80 unsigned int sl_count;
81 struct in6_addr sl_addr[0];
82 };
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
89 struct ipv6_mc_socklist {
90 struct in6_addr addr;
91 int ifindex;
92 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
93 struct ipv6_mc_socklist __rcu *next;
94 rwlock_t sflock;
95 struct ip6_sf_socklist *sflist;
96 struct rcu_head rcu;
97 };
98
99 struct ip6_sf_list {
100 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
114 struct ifmcaddr6 {
115 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;
121 unsigned char mca_crcount;
122 unsigned long mca_sfcount[2];
123 struct timer_list mca_timer;
124 unsigned int mca_flags;
125 int mca_users;
126 refcount_t mca_refcnt;
127 spinlock_t mca_lock;
128 unsigned long mca_cstamp;
129 unsigned long mca_tstamp;
130 };
131
132 /* Anycast stuff */
133
134 struct ipv6_ac_socklist {
135 struct in6_addr acl_addr;
136 int acl_ifindex;
137 struct ipv6_ac_socklist *acl_next;
138 };
139
140 struct ifacaddr6 {
141 struct in6_addr aca_addr;
142 struct fib6_info *aca_rt;
143 struct ifacaddr6 *aca_next;
144 struct hlist_node aca_addr_lst;
145 int aca_users;
146 refcount_t aca_refcnt;
147 unsigned long aca_cstamp;
148 unsigned long aca_tstamp;
149 struct rcu_head rcu;
150 };
151
152 #define IFA_HOST IPV6_ADDR_LOOPBACK
153 #define IFA_LINK IPV6_ADDR_LINKLOCAL
154 #define IFA_SITE IPV6_ADDR_SITELOCAL
155
156 struct ipv6_devstat {
157 struct proc_dir_entry *proc_dir_entry;
158 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
159 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
160 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
161 };
162
163 struct inet6_dev {
164 struct net_device *dev;
165
166 struct list_head addr_list;
167
168 struct ifmcaddr6 *mc_list;
169 struct ifmcaddr6 *mc_tomb;
170 spinlock_t mc_lock;
171
172 unsigned char mc_qrv; /* Query Robustness Variable */
173 unsigned char mc_gq_running;
174 unsigned char mc_ifc_count;
175 unsigned char mc_dad_count;
176
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 */
180 unsigned long mc_maxdelay;
181
182 struct timer_list mc_gq_timer; /* general query timer */
183 struct timer_list mc_ifc_timer; /* interface change timer */
184 struct timer_list mc_dad_timer; /* dad complete mc timer */
185
186 struct ifacaddr6 *ac_list;
187 rwlock_t lock;
188 refcount_t refcnt;
189 __u32 if_flags;
190 int dead;
191
192 u32 desync_factor;
193 u8 rndid[8];
194 struct list_head tempaddr_list;
195
196 struct in6_addr token;
197
198 struct neigh_parms *nd_parms;
199 struct ipv6_devconf cnf;
200 struct ipv6_devstat stats;
201
202 struct timer_list rs_timer;
203 __s32 rs_interval; /* in jiffies */
204 __u8 rs_probes;
205
206 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
207 struct rcu_head rcu;
208 };
209
ipv6_eth_mc_map(const struct in6_addr * addr,char * buf)210 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
211 {
212 /*
213 * +-------+-------+-------+-------+-------+-------+
214 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 |
215 * +-------+-------+-------+-------+-------+-------+
216 */
217
218 buf[0]= 0x33;
219 buf[1]= 0x33;
220
221 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
222 }
223
ipv6_arcnet_mc_map(const struct in6_addr * addr,char * buf)224 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
225 {
226 buf[0] = 0x00;
227 }
228
ipv6_ib_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)229 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
230 const unsigned char *broadcast, char *buf)
231 {
232 unsigned char scope = broadcast[5] & 0xF;
233
234 buf[0] = 0; /* Reserved */
235 buf[1] = 0xff; /* Multicast QPN */
236 buf[2] = 0xff;
237 buf[3] = 0xff;
238 buf[4] = 0xff;
239 buf[5] = 0x10 | scope; /* scope from broadcast address */
240 buf[6] = 0x60; /* IPv6 signature */
241 buf[7] = 0x1b;
242 buf[8] = broadcast[8]; /* P_Key */
243 buf[9] = broadcast[9];
244 memcpy(buf + 10, addr->s6_addr + 6, 10);
245 }
246
ipv6_ipgre_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)247 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
248 const unsigned char *broadcast, char *buf)
249 {
250 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
251 memcpy(buf, broadcast, 4);
252 } else {
253 /* v4mapped? */
254 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
255 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
256 return -EINVAL;
257 memcpy(buf, &addr->s6_addr32[3], 4);
258 }
259 return 0;
260 }
261
262 #endif
263
