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 rcu_head rcu;
82 struct in6_addr sl_addr[];
83 };
84
85 #define IP6_SFBLOCK 10 /* allocate this many at once */
86
87 struct ipv6_mc_socklist {
88 struct in6_addr addr;
89 int ifindex;
90 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
91 struct ipv6_mc_socklist __rcu *next;
92 struct ip6_sf_socklist __rcu *sflist;
93 struct rcu_head rcu;
94 };
95
96 struct ip6_sf_list {
97 struct ip6_sf_list __rcu *sf_next;
98 struct in6_addr sf_addr;
99 unsigned long sf_count[2]; /* include/exclude counts */
100 unsigned char sf_gsresp; /* include in g & s response? */
101 unsigned char sf_oldin; /* change state */
102 unsigned char sf_crcount; /* retrans. left to send */
103 struct rcu_head rcu;
104 };
105
106 #define MAF_TIMER_RUNNING 0x01
107 #define MAF_LAST_REPORTER 0x02
108 #define MAF_LOADED 0x04
109 #define MAF_NOREPORT 0x08
110 #define MAF_GSQUERY 0x10
111
112 struct ifmcaddr6 {
113 struct in6_addr mca_addr;
114 struct inet6_dev *idev;
115 struct ifmcaddr6 __rcu *next;
116 struct ip6_sf_list __rcu *mca_sources;
117 struct ip6_sf_list __rcu *mca_tomb;
118 unsigned int mca_sfmode;
119 unsigned char mca_crcount;
120 unsigned long mca_sfcount[2];
121 struct delayed_work mca_work;
122 unsigned int mca_flags;
123 int mca_users;
124 refcount_t mca_refcnt;
125 unsigned long mca_cstamp;
126 unsigned long mca_tstamp;
127 struct rcu_head rcu;
128 };
129
130 /* Anycast stuff */
131
132 struct ipv6_ac_socklist {
133 struct in6_addr acl_addr;
134 int acl_ifindex;
135 struct ipv6_ac_socklist *acl_next;
136 };
137
138 struct ifacaddr6 {
139 struct in6_addr aca_addr;
140 struct fib6_info *aca_rt;
141 struct ifacaddr6 *aca_next;
142 struct hlist_node aca_addr_lst;
143 int aca_users;
144 refcount_t aca_refcnt;
145 unsigned long aca_cstamp;
146 unsigned long aca_tstamp;
147 struct rcu_head rcu;
148 };
149
150 #define IFA_HOST IPV6_ADDR_LOOPBACK
151 #define IFA_LINK IPV6_ADDR_LINKLOCAL
152 #define IFA_SITE IPV6_ADDR_SITELOCAL
153
154 struct ipv6_devstat {
155 struct proc_dir_entry *proc_dir_entry;
156 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
157 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
158 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
159 };
160
161 struct inet6_dev {
162 struct net_device *dev;
163
164 struct list_head addr_list;
165
166 struct ifmcaddr6 __rcu *mc_list;
167 struct ifmcaddr6 __rcu *mc_tomb;
168
169 unsigned char mc_qrv; /* Query Robustness Variable */
170 unsigned char mc_gq_running;
171 unsigned char mc_ifc_count;
172 unsigned char mc_dad_count;
173
174 unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */
175 unsigned long mc_qi; /* Query Interval */
176 unsigned long mc_qri; /* Query Response Interval */
177 unsigned long mc_maxdelay;
178
179 struct delayed_work mc_gq_work; /* general query work */
180 struct delayed_work mc_ifc_work; /* interface change work */
181 struct delayed_work mc_dad_work; /* dad complete mc work */
182 struct delayed_work mc_query_work; /* mld query work */
183 struct delayed_work mc_report_work; /* mld report work */
184
185 struct sk_buff_head mc_query_queue; /* mld query queue */
186 struct sk_buff_head mc_report_queue; /* mld report queue */
187
188 spinlock_t mc_query_lock; /* mld query queue lock */
189 spinlock_t mc_report_lock; /* mld query report lock */
190 struct mutex mc_lock; /* mld global lock */
191
192 struct ifacaddr6 *ac_list;
193 rwlock_t lock;
194 refcount_t refcnt;
195 __u32 if_flags;
196 int dead;
197
198 u32 desync_factor;
199 struct list_head tempaddr_list;
200
201 struct in6_addr token;
202
203 struct neigh_parms *nd_parms;
204 struct ipv6_devconf cnf;
205 struct ipv6_devstat stats;
206
207 struct timer_list rs_timer;
208 __s32 rs_interval; /* in jiffies */
209 __u8 rs_probes;
210
211 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
212 struct rcu_head rcu;
213
214 unsigned int ra_mtu;
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