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
34enum {
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
42struct 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 struct list_head tmp_list;
74 struct inet6_ifaddr *ifpub;
75 int regen_count;
76
77 bool tokenized;
78
79 struct rcu_head rcu;
80 struct in6_addr peer_addr;
81};
82
83struct ip6_sf_socklist {
84 unsigned int sl_max;
85 unsigned int sl_count;
86 struct in6_addr sl_addr[0];
87};
88
89#define IP6_SFLSIZE(count) (sizeof(struct ip6_sf_socklist) + \
90 (count) * sizeof(struct in6_addr))
91
92#define IP6_SFBLOCK 10 /* allocate this many at once */
93
94struct ipv6_mc_socklist {
95 struct in6_addr addr;
96 int ifindex;
97 struct ipv6_mc_socklist __rcu *next;
98 rwlock_t sflock;
99 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
100 struct ip6_sf_socklist *sflist;
101 struct rcu_head rcu;
102};
103
104struct ip6_sf_list {
105 struct ip6_sf_list *sf_next;
106 struct in6_addr sf_addr;
107 unsigned long sf_count[2]; /* include/exclude counts */
108 unsigned char sf_gsresp; /* include in g & s response? */
109 unsigned char sf_oldin; /* change state */
110 unsigned char sf_crcount; /* retrans. left to send */
111};
112
113#define MAF_TIMER_RUNNING 0x01
114#define MAF_LAST_REPORTER 0x02
115#define MAF_LOADED 0x04
116#define MAF_NOREPORT 0x08
117#define MAF_GSQUERY 0x10
118
119struct ifmcaddr6 {
120 struct in6_addr mca_addr;
121 struct inet6_dev *idev;
122 struct ifmcaddr6 *next;
123 struct ip6_sf_list *mca_sources;
124 struct ip6_sf_list *mca_tomb;
125 unsigned int mca_sfmode;
126 unsigned char mca_crcount;
127 unsigned long mca_sfcount[2];
128 struct timer_list mca_timer;
129 unsigned int mca_flags;
130 int mca_users;
131 refcount_t mca_refcnt;
132 spinlock_t mca_lock;
133 unsigned long mca_cstamp;
134 unsigned long mca_tstamp;
135};
136
137/* Anycast stuff */
138
139struct ipv6_ac_socklist {
140 struct in6_addr acl_addr;
141 int acl_ifindex;
142 struct ipv6_ac_socklist *acl_next;
143};
144
145struct ifacaddr6 {
146 struct in6_addr aca_addr;
147 struct fib6_info *aca_rt;
148 struct ifacaddr6 *aca_next;
149 struct hlist_node aca_addr_lst;
150 int aca_users;
151 refcount_t aca_refcnt;
152 unsigned long aca_cstamp;
153 unsigned long aca_tstamp;
154 struct rcu_head rcu;
155};
156
157#define IFA_HOST IPV6_ADDR_LOOPBACK
158#define IFA_LINK IPV6_ADDR_LINKLOCAL
159#define IFA_SITE IPV6_ADDR_SITELOCAL
160
161struct ipv6_devstat {
162 struct proc_dir_entry *proc_dir_entry;
163 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
164 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
165 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
166};
167
168struct inet6_dev {
169 struct net_device *dev;
170
171 struct list_head addr_list;
172
173 struct ifmcaddr6 *mc_list;
174 struct ifmcaddr6 *mc_tomb;
175 spinlock_t mc_lock;
176
177 unsigned char mc_qrv; /* Query Robustness Variable */
178 unsigned char mc_gq_running;
179 unsigned char mc_ifc_count;
180 unsigned char mc_dad_count;
181
182 unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */
183 unsigned long mc_qi; /* Query Interval */
184 unsigned long mc_qri; /* Query Response Interval */
185 unsigned long mc_maxdelay;
186
187 struct timer_list mc_gq_timer; /* general query timer */
188 struct timer_list mc_ifc_timer; /* interface change timer */
189 struct timer_list mc_dad_timer; /* dad complete mc timer */
190
191 struct ifacaddr6 *ac_list;
192 rwlock_t lock;
193 refcount_t refcnt;
194 __u32 if_flags;
195 int dead;
196
197 u32 desync_factor;
198 u8 rndid[8];
199 struct list_head tempaddr_list;
200
201 struct in6_addr token;
202
203 struct neigh_parms *nd_parms;
204 struct ipv6_devconf cnf;
205 struct ipv6_devstat stats;
206
207 struct timer_list rs_timer;
208 __s32 rs_interval; /* in jiffies */
209 __u8 rs_probes;
210
211 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
212 struct rcu_head rcu;
213};
214
215static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
216{
217 /*
218 * +-------+-------+-------+-------+-------+-------+
219 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 |
220 * +-------+-------+-------+-------+-------+-------+
221 */
222
223 buf[0]= 0x33;
224 buf[1]= 0x33;
225
226 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
227}
228
229static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
230{
231 buf[0] = 0x00;
232}
233
234static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
235 const unsigned char *broadcast, char *buf)
236{
237 unsigned char scope = broadcast[5] & 0xF;
238
239 buf[0] = 0; /* Reserved */
240 buf[1] = 0xff; /* Multicast QPN */
241 buf[2] = 0xff;
242 buf[3] = 0xff;
243 buf[4] = 0xff;
244 buf[5] = 0x10 | scope; /* scope from broadcast address */
245 buf[6] = 0x60; /* IPv6 signature */
246 buf[7] = 0x1b;
247 buf[8] = broadcast[8]; /* P_Key */
248 buf[9] = broadcast[9];
249 memcpy(buf + 10, addr->s6_addr + 6, 10);
250}
251
252static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
253 const unsigned char *broadcast, char *buf)
254{
255 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
256 memcpy(buf, broadcast, 4);
257 } else {
258 /* v4mapped? */
259 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
260 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
261 return -EINVAL;
262 memcpy(buf, &addr->s6_addr32[3], 4);
263 }
264 return 0;
265}
266
267#endif
268