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 u8 ifa_proto;
79
80 struct rcu_head rcu;
81 struct in6_addr peer_addr;
82 };
83
84 struct ip6_sf_socklist {
85 unsigned int sl_max;
86 unsigned int sl_count;
87 struct rcu_head rcu;
88 struct in6_addr sl_addr[] __counted_by(sl_max);
89 };
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 struct ip6_sf_socklist __rcu *sflist;
99 struct rcu_head rcu;
100 };
101
102 struct ip6_sf_list {
103 struct ip6_sf_list __rcu *sf_next;
104 struct in6_addr sf_addr;
105 unsigned long sf_count[2]; /* include/exclude counts */
106 unsigned char sf_gsresp; /* include in g & s response? */
107 unsigned char sf_oldin; /* change state */
108 unsigned char sf_crcount; /* retrans. left to send */
109 struct rcu_head rcu;
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 __rcu *next;
122 struct ip6_sf_list __rcu *mca_sources;
123 struct ip6_sf_list __rcu *mca_tomb;
124 unsigned int mca_sfmode;
125 unsigned char mca_crcount;
126 unsigned long mca_sfcount[2];
127 struct delayed_work mca_work;
128 unsigned int mca_flags;
129 int mca_users;
130 refcount_t mca_refcnt;
131 unsigned long mca_cstamp;
132 unsigned long mca_tstamp;
133 struct rcu_head rcu;
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 __rcu *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 netdevice_tracker dev_tracker;
170
171 struct list_head addr_list;
172
173 struct ifmcaddr6 __rcu *mc_list;
174 struct ifmcaddr6 __rcu *mc_tomb;
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 delayed_work mc_gq_work; /* general query work */
187 struct delayed_work mc_ifc_work; /* interface change work */
188 struct delayed_work mc_dad_work; /* dad complete mc work */
189 struct delayed_work mc_query_work; /* mld query work */
190 struct delayed_work mc_report_work; /* mld report work */
191
192 struct sk_buff_head mc_query_queue; /* mld query queue */
193 struct sk_buff_head mc_report_queue; /* mld report queue */
194
195 spinlock_t mc_query_lock; /* mld query queue lock */
196 spinlock_t mc_report_lock; /* mld query report lock */
197 struct mutex mc_lock; /* mld global lock */
198
199 struct ifacaddr6 __rcu *ac_list;
200 rwlock_t lock;
201 refcount_t refcnt;
202 __u32 if_flags;
203 int dead;
204
205 u32 desync_factor;
206 struct list_head tempaddr_list;
207
208 struct in6_addr token;
209
210 struct neigh_parms *nd_parms;
211 struct ipv6_devconf cnf;
212 struct ipv6_devstat stats;
213
214 struct timer_list rs_timer;
215 __s32 rs_interval; /* in jiffies */
216 __u8 rs_probes;
217
218 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
219 struct rcu_head rcu;
220
221 unsigned int ra_mtu;
222 };
223
ipv6_eth_mc_map(const struct in6_addr * addr,char * buf)224 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
225 {
226 /*
227 * +-------+-------+-------+-------+-------+-------+
228 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 |
229 * +-------+-------+-------+-------+-------+-------+
230 */
231
232 buf[0]= 0x33;
233 buf[1]= 0x33;
234
235 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
236 }
237
ipv6_arcnet_mc_map(const struct in6_addr * addr,char * buf)238 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
239 {
240 buf[0] = 0x00;
241 }
242
ipv6_ib_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)243 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
244 const unsigned char *broadcast, char *buf)
245 {
246 unsigned char scope = broadcast[5] & 0xF;
247
248 buf[0] = 0; /* Reserved */
249 buf[1] = 0xff; /* Multicast QPN */
250 buf[2] = 0xff;
251 buf[3] = 0xff;
252 buf[4] = 0xff;
253 buf[5] = 0x10 | scope; /* scope from broadcast address */
254 buf[6] = 0x60; /* IPv6 signature */
255 buf[7] = 0x1b;
256 buf[8] = broadcast[8]; /* P_Key */
257 buf[9] = broadcast[9];
258 memcpy(buf + 10, addr->s6_addr + 6, 10);
259 }
260
ipv6_ipgre_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)261 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
262 const unsigned char *broadcast, char *buf)
263 {
264 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
265 memcpy(buf, broadcast, 4);
266 } else {
267 /* v4mapped? */
268 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
269 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
270 return -EINVAL;
271 memcpy(buf, &addr->s6_addr32[3], 4);
272 }
273 return 0;
274 }
275
276 #endif
277