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 __u32 rt_priority;
46
47 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
48 __u32 valid_lft;
49 __u32 prefered_lft;
50 refcount_t refcnt;
51 spinlock_t lock;
52
53 int state;
54
55 __u32 flags;
56 __u8 dad_probes;
57 __u8 stable_privacy_retry;
58
59 __u16 scope;
60 __u64 dad_nonce;
61
62 unsigned long cstamp; /* created timestamp */
63 unsigned long tstamp; /* updated timestamp */
64
65 struct delayed_work dad_work;
66
67 struct inet6_dev *idev;
68 struct fib6_info *rt;
69
70 struct hlist_node addr_lst;
71 struct list_head if_list;
72 /*
73 * Used to safely traverse idev->addr_list in process context
74 * if the idev->lock needed to protect idev->addr_list cannot be held.
75 * In that case, add the items to this list temporarily and iterate
76 * without holding idev->lock.
77 * See addrconf_ifdown and dev_forward_change.
78 */
79 struct list_head if_list_aux;
80
81 struct list_head tmp_list;
82 struct inet6_ifaddr *ifpub;
83 int regen_count;
84
85 bool tokenized;
86
87 struct rcu_head rcu;
88 struct in6_addr peer_addr;
89 };
90
91 struct ip6_sf_socklist {
92 unsigned int sl_max;
93 unsigned int sl_count;
94 struct in6_addr sl_addr[0];
95 };
96
97 #define IP6_SFLSIZE(count) (sizeof(struct ip6_sf_socklist) + \
98 (count) * sizeof(struct in6_addr))
99
100 #define IP6_SFBLOCK 10 /* allocate this many at once */
101
102 struct ipv6_mc_socklist {
103 struct in6_addr addr;
104 int ifindex;
105 struct ipv6_mc_socklist __rcu *next;
106 rwlock_t sflock;
107 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
108 struct ip6_sf_socklist *sflist;
109 struct rcu_head rcu;
110 };
111
112 struct ip6_sf_list {
113 struct ip6_sf_list *sf_next;
114 struct in6_addr sf_addr;
115 unsigned long sf_count[2]; /* include/exclude counts */
116 unsigned char sf_gsresp; /* include in g & s response? */
117 unsigned char sf_oldin; /* change state */
118 unsigned char sf_crcount; /* retrans. left to send */
119 };
120
121 #define MAF_TIMER_RUNNING 0x01
122 #define MAF_LAST_REPORTER 0x02
123 #define MAF_LOADED 0x04
124 #define MAF_NOREPORT 0x08
125 #define MAF_GSQUERY 0x10
126
127 struct ifmcaddr6 {
128 struct in6_addr mca_addr;
129 struct inet6_dev *idev;
130 struct ifmcaddr6 *next;
131 struct ip6_sf_list *mca_sources;
132 struct ip6_sf_list *mca_tomb;
133 unsigned int mca_sfmode;
134 unsigned char mca_crcount;
135 unsigned long mca_sfcount[2];
136 struct timer_list mca_timer;
137 unsigned int mca_flags;
138 int mca_users;
139 refcount_t mca_refcnt;
140 spinlock_t mca_lock;
141 unsigned long mca_cstamp;
142 unsigned long mca_tstamp;
143 };
144
145 /* Anycast stuff */
146
147 struct ipv6_ac_socklist {
148 struct in6_addr acl_addr;
149 int acl_ifindex;
150 struct ipv6_ac_socklist *acl_next;
151 };
152
153 struct ifacaddr6 {
154 struct in6_addr aca_addr;
155 struct fib6_info *aca_rt;
156 struct ifacaddr6 *aca_next;
157 int aca_users;
158 refcount_t aca_refcnt;
159 unsigned long aca_cstamp;
160 unsigned long aca_tstamp;
161 };
162
163 #define IFA_HOST IPV6_ADDR_LOOPBACK
164 #define IFA_LINK IPV6_ADDR_LINKLOCAL
165 #define IFA_SITE IPV6_ADDR_SITELOCAL
166
167 struct ipv6_devstat {
168 struct proc_dir_entry *proc_dir_entry;
169 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
170 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
171 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
172 };
173
174 struct inet6_dev {
175 struct net_device *dev;
176
177 struct list_head addr_list;
178
179 struct ifmcaddr6 *mc_list;
180 struct ifmcaddr6 *mc_tomb;
181 spinlock_t mc_lock;
182
183 unsigned char mc_qrv; /* Query Robustness Variable */
184 unsigned char mc_gq_running;
185 unsigned char mc_ifc_count;
186 unsigned char mc_dad_count;
187
188 unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */
189 unsigned long mc_qi; /* Query Interval */
190 unsigned long mc_qri; /* Query Response Interval */
191 unsigned long mc_maxdelay;
192
193 struct timer_list mc_gq_timer; /* general query timer */
194 struct timer_list mc_ifc_timer; /* interface change timer */
195 struct timer_list mc_dad_timer; /* dad complete mc timer */
196
197 struct ifacaddr6 *ac_list;
198 rwlock_t lock;
199 refcount_t refcnt;
200 __u32 if_flags;
201 int dead;
202
203 u32 desync_factor;
204 u8 rndid[8];
205 struct list_head tempaddr_list;
206
207 struct in6_addr token;
208
209 struct neigh_parms *nd_parms;
210 struct ipv6_devconf cnf;
211 struct ipv6_devstat stats;
212
213 struct timer_list rs_timer;
214 __s32 rs_interval; /* in jiffies */
215 __u8 rs_probes;
216
217 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
218 struct rcu_head rcu;
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