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 rcu_head rcu;
86 struct in6_addr sl_addr[];
87 };
88
89 #define IP6_SFBLOCK 10 /* allocate this many at once */
90
91 struct 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
100 struct 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
116 struct 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
136 struct ipv6_ac_socklist {
137 struct in6_addr acl_addr;
138 int acl_ifindex;
139 struct ipv6_ac_socklist *acl_next;
140 };
141
142 struct ifacaddr6 {
143 struct in6_addr aca_addr;
144 struct fib6_info *aca_rt;
145 struct ifacaddr6 *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
158 struct 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
165 struct inet6_dev {
166 struct net_device *dev;
167
168 struct list_head addr_list;
169
170 struct ifmcaddr6 __rcu *mc_list;
171 struct ifmcaddr6 __rcu *mc_tomb;
172
173 unsigned char mc_qrv; /* Query Robustness Variable */
174 unsigned char mc_gq_running;
175 unsigned char mc_ifc_count;
176 unsigned char mc_dad_count;
177
178 unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */
179 unsigned long mc_qi; /* Query Interval */
180 unsigned long mc_qri; /* Query Response Interval */
181 unsigned long mc_maxdelay;
182
183 struct delayed_work mc_gq_work; /* general query work */
184 struct delayed_work mc_ifc_work; /* interface change work */
185 struct delayed_work mc_dad_work; /* dad complete mc work */
186 struct delayed_work mc_query_work; /* mld query work */
187 struct delayed_work mc_report_work; /* mld report work */
188
189 struct sk_buff_head mc_query_queue; /* mld query queue */
190 struct sk_buff_head mc_report_queue; /* mld report queue */
191
192 spinlock_t mc_query_lock; /* mld query queue lock */
193 spinlock_t mc_report_lock; /* mld query report lock */
194 struct mutex mc_lock; /* mld global lock */
195
196 struct ifacaddr6 *ac_list;
197 rwlock_t lock;
198 refcount_t refcnt;
199 __u32 if_flags;
200 int dead;
201
202 u32 desync_factor;
203 struct list_head tempaddr_list;
204
205 struct in6_addr token;
206
207 struct neigh_parms *nd_parms;
208 struct ipv6_devconf cnf;
209 struct ipv6_devstat stats;
210
211 struct timer_list rs_timer;
212 __s32 rs_interval; /* in jiffies */
213 __u8 rs_probes;
214
215 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
216 struct rcu_head rcu;
217
218 unsigned int ra_mtu;
219 };
220
ipv6_eth_mc_map(const struct in6_addr * addr,char * buf)221 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
222 {
223 /*
224 * +-------+-------+-------+-------+-------+-------+
225 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 |
226 * +-------+-------+-------+-------+-------+-------+
227 */
228
229 buf[0]= 0x33;
230 buf[1]= 0x33;
231
232 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
233 }
234
ipv6_arcnet_mc_map(const struct in6_addr * addr,char * buf)235 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
236 {
237 buf[0] = 0x00;
238 }
239
ipv6_ib_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)240 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
241 const unsigned char *broadcast, char *buf)
242 {
243 unsigned char scope = broadcast[5] & 0xF;
244
245 buf[0] = 0; /* Reserved */
246 buf[1] = 0xff; /* Multicast QPN */
247 buf[2] = 0xff;
248 buf[3] = 0xff;
249 buf[4] = 0xff;
250 buf[5] = 0x10 | scope; /* scope from broadcast address */
251 buf[6] = 0x60; /* IPv6 signature */
252 buf[7] = 0x1b;
253 buf[8] = broadcast[8]; /* P_Key */
254 buf[9] = broadcast[9];
255 memcpy(buf + 10, addr->s6_addr + 6, 10);
256 }
257
ipv6_ipgre_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)258 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
259 const unsigned char *broadcast, char *buf)
260 {
261 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
262 memcpy(buf, broadcast, 4);
263 } else {
264 /* v4mapped? */
265 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
266 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
267 return -EINVAL;
268 memcpy(buf, &addr->s6_addr32[3], 4);
269 }
270 return 0;
271 }
272
273 #endif
274