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 | * Used to safely traverse idev->addr_list in process context |
69 | * if the idev->lock needed to protect idev->addr_list cannot be held. |
70 | * In that case, add the items to this list temporarily and iterate |
71 | * without holding idev->lock. |
72 | * See addrconf_ifdown and dev_forward_change. |
73 | */ |
74 | struct list_head if_list_aux; |
75 | |
76 | struct list_head tmp_list; |
77 | struct inet6_ifaddr *ifpub; |
78 | int regen_count; |
79 | |
80 | bool tokenized; |
81 | |
82 | u8 ifa_proto; |
83 | |
84 | struct rcu_head rcu; |
85 | struct in6_addr peer_addr; |
86 | }; |
87 | |
88 | struct ip6_sf_socklist { |
89 | unsigned int sl_max; |
90 | unsigned int sl_count; |
91 | struct rcu_head rcu; |
92 | struct in6_addr sl_addr[] __counted_by(sl_max); |
93 | }; |
94 | |
95 | #define IP6_SFBLOCK 10 /* allocate this many at once */ |
96 | |
97 | struct ipv6_mc_socklist { |
98 | struct in6_addr addr; |
99 | int ifindex; |
100 | unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */ |
101 | struct ipv6_mc_socklist __rcu *next; |
102 | struct ip6_sf_socklist __rcu *sflist; |
103 | struct rcu_head rcu; |
104 | }; |
105 | |
106 | struct ip6_sf_list { |
107 | struct ip6_sf_list __rcu *sf_next; |
108 | struct in6_addr sf_addr; |
109 | unsigned long sf_count[2]; /* include/exclude counts */ |
110 | unsigned char sf_gsresp; /* include in g & s response? */ |
111 | unsigned char sf_oldin; /* change state */ |
112 | unsigned char sf_crcount; /* retrans. left to send */ |
113 | struct rcu_head rcu; |
114 | }; |
115 | |
116 | #define MAF_TIMER_RUNNING 0x01 |
117 | #define MAF_LAST_REPORTER 0x02 |
118 | #define MAF_LOADED 0x04 |
119 | #define MAF_NOREPORT 0x08 |
120 | #define MAF_GSQUERY 0x10 |
121 | |
122 | struct ifmcaddr6 { |
123 | struct in6_addr mca_addr; |
124 | struct inet6_dev *idev; |
125 | struct ifmcaddr6 __rcu *next; |
126 | struct ip6_sf_list __rcu *mca_sources; |
127 | struct ip6_sf_list __rcu *mca_tomb; |
128 | unsigned int mca_sfmode; |
129 | unsigned char mca_crcount; |
130 | unsigned long mca_sfcount[2]; |
131 | struct delayed_work mca_work; |
132 | unsigned int mca_flags; |
133 | int mca_users; |
134 | refcount_t mca_refcnt; |
135 | unsigned long mca_cstamp; |
136 | unsigned long mca_tstamp; |
137 | struct rcu_head rcu; |
138 | }; |
139 | |
140 | /* Anycast stuff */ |
141 | |
142 | struct ipv6_ac_socklist { |
143 | struct in6_addr acl_addr; |
144 | int acl_ifindex; |
145 | struct ipv6_ac_socklist *acl_next; |
146 | }; |
147 | |
148 | struct ifacaddr6 { |
149 | struct in6_addr aca_addr; |
150 | struct fib6_info *aca_rt; |
151 | struct ifacaddr6 *aca_next; |
152 | struct hlist_node aca_addr_lst; |
153 | int aca_users; |
154 | refcount_t aca_refcnt; |
155 | unsigned long aca_cstamp; |
156 | unsigned long aca_tstamp; |
157 | struct rcu_head rcu; |
158 | }; |
159 | |
160 | #define IFA_HOST IPV6_ADDR_LOOPBACK |
161 | #define IFA_LINK IPV6_ADDR_LINKLOCAL |
162 | #define IFA_SITE IPV6_ADDR_SITELOCAL |
163 | |
164 | struct ipv6_devstat { |
165 | struct proc_dir_entry *proc_dir_entry; |
166 | DEFINE_SNMP_STAT(struct ipstats_mib, ipv6); |
167 | DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev); |
168 | DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev); |
169 | }; |
170 | |
171 | struct inet6_dev { |
172 | struct net_device *dev; |
173 | netdevice_tracker dev_tracker; |
174 | |
175 | struct list_head addr_list; |
176 | |
177 | struct ifmcaddr6 __rcu *mc_list; |
178 | struct ifmcaddr6 __rcu *mc_tomb; |
179 | |
180 | unsigned char mc_qrv; /* Query Robustness Variable */ |
181 | unsigned char mc_gq_running; |
182 | unsigned char mc_ifc_count; |
183 | unsigned char mc_dad_count; |
184 | |
185 | unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */ |
186 | unsigned long mc_qi; /* Query Interval */ |
187 | unsigned long mc_qri; /* Query Response Interval */ |
188 | unsigned long mc_maxdelay; |
189 | |
190 | struct delayed_work mc_gq_work; /* general query work */ |
191 | struct delayed_work mc_ifc_work; /* interface change work */ |
192 | struct delayed_work mc_dad_work; /* dad complete mc work */ |
193 | struct delayed_work mc_query_work; /* mld query work */ |
194 | struct delayed_work mc_report_work; /* mld report work */ |
195 | |
196 | struct sk_buff_head mc_query_queue; /* mld query queue */ |
197 | struct sk_buff_head mc_report_queue; /* mld report queue */ |
198 | |
199 | spinlock_t mc_query_lock; /* mld query queue lock */ |
200 | spinlock_t mc_report_lock; /* mld query report lock */ |
201 | struct mutex mc_lock; /* mld global lock */ |
202 | |
203 | struct ifacaddr6 *ac_list; |
204 | rwlock_t lock; |
205 | refcount_t refcnt; |
206 | __u32 if_flags; |
207 | int dead; |
208 | |
209 | u32 desync_factor; |
210 | struct list_head tempaddr_list; |
211 | |
212 | struct in6_addr token; |
213 | |
214 | struct neigh_parms *nd_parms; |
215 | struct ipv6_devconf cnf; |
216 | struct ipv6_devstat stats; |
217 | |
218 | struct timer_list rs_timer; |
219 | __s32 rs_interval; /* in jiffies */ |
220 | __u8 rs_probes; |
221 | |
222 | unsigned long tstamp; /* ipv6InterfaceTable update timestamp */ |
223 | struct rcu_head rcu; |
224 | |
225 | unsigned int ra_mtu; |
226 | }; |
227 | |
228 | static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf) |
229 | { |
230 | /* |
231 | * +-------+-------+-------+-------+-------+-------+ |
232 | * | 33 | 33 | DST13 | DST14 | DST15 | DST16 | |
233 | * +-------+-------+-------+-------+-------+-------+ |
234 | */ |
235 | |
236 | buf[0]= 0x33; |
237 | buf[1]= 0x33; |
238 | |
239 | memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32)); |
240 | } |
241 | |
242 | static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf) |
243 | { |
244 | buf[0] = 0x00; |
245 | } |
246 | |
247 | static inline void ipv6_ib_mc_map(const struct in6_addr *addr, |
248 | const unsigned char *broadcast, char *buf) |
249 | { |
250 | unsigned char scope = broadcast[5] & 0xF; |
251 | |
252 | buf[0] = 0; /* Reserved */ |
253 | buf[1] = 0xff; /* Multicast QPN */ |
254 | buf[2] = 0xff; |
255 | buf[3] = 0xff; |
256 | buf[4] = 0xff; |
257 | buf[5] = 0x10 | scope; /* scope from broadcast address */ |
258 | buf[6] = 0x60; /* IPv6 signature */ |
259 | buf[7] = 0x1b; |
260 | buf[8] = broadcast[8]; /* P_Key */ |
261 | buf[9] = broadcast[9]; |
262 | memcpy(buf + 10, addr->s6_addr + 6, 10); |
263 | } |
264 | |
265 | static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr, |
266 | const unsigned char *broadcast, char *buf) |
267 | { |
268 | if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) { |
269 | memcpy(buf, broadcast, 4); |
270 | } else { |
271 | /* v4mapped? */ |
272 | if ((addr->s6_addr32[0] | addr->s6_addr32[1] | |
273 | (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0) |
274 | return -EINVAL; |
275 | memcpy(buf, &addr->s6_addr32[3], 4); |
276 | } |
277 | return 0; |
278 | } |
279 | |
280 | #endif |
281 | |