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 enum {
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
33 struct 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 struct rcu_head rcu;
79 struct in6_addr peer_addr;
80 };
81
82 struct ip6_sf_socklist {
83 unsigned int sl_max;
84 unsigned int sl_count;
85 struct in6_addr sl_addr[];
86 };
87
88 #define IP6_SFLSIZE(count) (sizeof(struct ip6_sf_socklist) + \
89 (count) * sizeof(struct in6_addr))
90
91 #define IP6_SFBLOCK 10 /* allocate this many at once */
92
93 struct 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 rwlock_t sflock;
99 struct ip6_sf_socklist *sflist;
100 struct rcu_head rcu;
101 };
102
103 struct ip6_sf_list {
104 struct ip6_sf_list *sf_next;
105 struct in6_addr sf_addr;
106 unsigned long sf_count[2]; /* include/exclude counts */
107 unsigned char sf_gsresp; /* include in g & s response? */
108 unsigned char sf_oldin; /* change state */
109 unsigned char sf_crcount; /* retrans. left to send */
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
118 struct ifmcaddr6 {
119 struct in6_addr mca_addr;
120 struct inet6_dev *idev;
121 struct ifmcaddr6 *next;
122 struct ip6_sf_list *mca_sources;
123 struct ip6_sf_list *mca_tomb;
124 unsigned int mca_sfmode;
125 unsigned char mca_crcount;
126 unsigned long mca_sfcount[2];
127 struct timer_list mca_timer;
128 unsigned int mca_flags;
129 int mca_users;
130 refcount_t mca_refcnt;
131 spinlock_t mca_lock;
132 unsigned long mca_cstamp;
133 unsigned long mca_tstamp;
134 };
135
136 /* Anycast stuff */
137
138 struct ipv6_ac_socklist {
139 struct in6_addr acl_addr;
140 int acl_ifindex;
141 struct ipv6_ac_socklist *acl_next;
142 };
143
144 struct ifacaddr6 {
145 struct in6_addr aca_addr;
146 struct fib6_info *aca_rt;
147 struct ifacaddr6 *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
160 struct 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
167 struct inet6_dev {
168 struct net_device *dev;
169
170 struct list_head addr_list;
171
172 struct ifmcaddr6 *mc_list;
173 struct ifmcaddr6 *mc_tomb;
174 spinlock_t mc_lock;
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 timer_list mc_gq_timer; /* general query timer */
187 struct timer_list mc_ifc_timer; /* interface change timer */
188 struct timer_list mc_dad_timer; /* dad complete mc timer */
189
190 struct ifacaddr6 *ac_list;
191 rwlock_t lock;
192 refcount_t refcnt;
193 __u32 if_flags;
194 int dead;
195
196 u32 desync_factor;
197 struct list_head tempaddr_list;
198
199 struct in6_addr token;
200
201 struct neigh_parms *nd_parms;
202 struct ipv6_devconf cnf;
203 struct ipv6_devstat stats;
204
205 struct timer_list rs_timer;
206 __s32 rs_interval; /* in jiffies */
207 __u8 rs_probes;
208
209 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
210 struct rcu_head rcu;
211 };
212
ipv6_eth_mc_map(const struct in6_addr * addr,char * buf)213 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
214 {
215 /*
216 * +-------+-------+-------+-------+-------+-------+
217 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 |
218 * +-------+-------+-------+-------+-------+-------+
219 */
220
221 buf[0]= 0x33;
222 buf[1]= 0x33;
223
224 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
225 }
226
ipv6_arcnet_mc_map(const struct in6_addr * addr,char * buf)227 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
228 {
229 buf[0] = 0x00;
230 }
231
ipv6_ib_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)232 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
233 const unsigned char *broadcast, char *buf)
234 {
235 unsigned char scope = broadcast[5] & 0xF;
236
237 buf[0] = 0; /* Reserved */
238 buf[1] = 0xff; /* Multicast QPN */
239 buf[2] = 0xff;
240 buf[3] = 0xff;
241 buf[4] = 0xff;
242 buf[5] = 0x10 | scope; /* scope from broadcast address */
243 buf[6] = 0x60; /* IPv6 signature */
244 buf[7] = 0x1b;
245 buf[8] = broadcast[8]; /* P_Key */
246 buf[9] = broadcast[9];
247 memcpy(buf + 10, addr->s6_addr + 6, 10);
248 }
249
ipv6_ipgre_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)250 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
251 const unsigned char *broadcast, char *buf)
252 {
253 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
254 memcpy(buf, broadcast, 4);
255 } else {
256 /* v4mapped? */
257 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
258 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
259 return -EINVAL;
260 memcpy(buf, &addr->s6_addr32[3], 4);
261 }
262 return 0;
263 }
264
265 #endif
266