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1 | /* | |
2 | * inet6 interface/address list definitions | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
6 | * Pedro Roque <roque@di.fc.ul.pt> | |
7 | * | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | */ | |
14 | ||
15 | #ifndef _NET_IF_INET6_H | |
16 | #define _NET_IF_INET6_H | |
17 | ||
18 | #include <net/snmp.h> | |
19 | #include <linux/ipv6.h> | |
20 | #include <linux/refcount.h> | |
21 | ||
22 | /* inet6_dev.if_flags */ | |
23 | ||
24 | #define IF_RA_OTHERCONF 0x80 | |
25 | #define IF_RA_MANAGED 0x40 | |
26 | #define IF_RA_RCVD 0x20 | |
27 | #define IF_RS_SENT 0x10 | |
28 | #define IF_READY 0x80000000 | |
29 | ||
30 | /* prefix flags */ | |
31 | #define IF_PREFIX_ONLINK 0x01 | |
32 | #define IF_PREFIX_AUTOCONF 0x02 | |
33 | ||
34 | enum { | |
35 | INET6_IFADDR_STATE_PREDAD, | |
36 | INET6_IFADDR_STATE_DAD, | |
37 | INET6_IFADDR_STATE_POSTDAD, | |
38 | INET6_IFADDR_STATE_ERRDAD, | |
39 | INET6_IFADDR_STATE_DEAD, | |
40 | }; | |
41 | ||
42 | struct inet6_ifaddr { | |
43 | struct in6_addr addr; | |
44 | __u32 prefix_len; | |
45 | ||
46 | /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */ | |
47 | __u32 valid_lft; | |
48 | __u32 prefered_lft; | |
49 | refcount_t refcnt; | |
50 | spinlock_t lock; | |
51 | ||
52 | int state; | |
53 | ||
54 | __u32 flags; | |
55 | __u8 dad_probes; | |
56 | __u8 stable_privacy_retry; | |
57 | ||
58 | __u16 scope; | |
59 | __u64 dad_nonce; | |
60 | ||
61 | unsigned long cstamp; /* created timestamp */ | |
62 | unsigned long tstamp; /* updated timestamp */ | |
63 | ||
64 | struct delayed_work dad_work; | |
65 | ||
66 | struct inet6_dev *idev; | |
67 | struct rt6_info *rt; | |
68 | ||
69 | struct hlist_node addr_lst; | |
70 | struct list_head if_list; | |
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[0]; | |
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 | struct ipv6_mc_socklist __rcu *next; | |
97 | rwlock_t sflock; | |
98 | unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */ | |
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 inet6_dev *aca_idev; | |
147 | struct rt6_info *aca_rt; | |
148 | struct ifacaddr6 *aca_next; | |
149 | int aca_users; | |
150 | refcount_t aca_refcnt; | |
151 | unsigned long aca_cstamp; | |
152 | unsigned long aca_tstamp; | |
153 | }; | |
154 | ||
155 | #define IFA_HOST IPV6_ADDR_LOOPBACK | |
156 | #define IFA_LINK IPV6_ADDR_LINKLOCAL | |
157 | #define IFA_SITE IPV6_ADDR_SITELOCAL | |
158 | ||
159 | struct ipv6_devstat { | |
160 | struct proc_dir_entry *proc_dir_entry; | |
161 | DEFINE_SNMP_STAT(struct ipstats_mib, ipv6); | |
162 | DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev); | |
163 | DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev); | |
164 | }; | |
165 | ||
166 | struct inet6_dev { | |
167 | struct net_device *dev; | |
168 | ||
169 | struct list_head addr_list; | |
170 | ||
171 | struct ifmcaddr6 *mc_list; | |
172 | struct ifmcaddr6 *mc_tomb; | |
173 | spinlock_t mc_lock; | |
174 | ||
175 | unsigned char mc_qrv; /* Query Robustness Variable */ | |
176 | unsigned char mc_gq_running; | |
177 | unsigned char mc_ifc_count; | |
178 | unsigned char mc_dad_count; | |
179 | ||
180 | unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */ | |
181 | unsigned long mc_qi; /* Query Interval */ | |
182 | unsigned long mc_qri; /* Query Response Interval */ | |
183 | unsigned long mc_maxdelay; | |
184 | ||
185 | struct timer_list mc_gq_timer; /* general query timer */ | |
186 | struct timer_list mc_ifc_timer; /* interface change timer */ | |
187 | struct timer_list mc_dad_timer; /* dad complete mc timer */ | |
188 | ||
189 | struct ifacaddr6 *ac_list; | |
190 | rwlock_t lock; | |
191 | refcount_t refcnt; | |
192 | __u32 if_flags; | |
193 | int dead; | |
194 | ||
195 | u32 desync_factor; | |
196 | u8 rndid[8]; | |
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 | ||
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 | ||
227 | static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf) | |
228 | { | |
229 | buf[0] = 0x00; | |
230 | } | |
231 | ||
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 | ||
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 |