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 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
83 struct 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
94 struct 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
104 struct 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
119 struct 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
139 struct ipv6_ac_socklist {
140 struct in6_addr acl_addr;
141 int acl_ifindex;
142 struct ipv6_ac_socklist *acl_next;
143 };
144
145 struct ifacaddr6 {
146 struct in6_addr aca_addr;
147 struct fib6_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
ipv6_eth_mc_map(const struct in6_addr * addr,char * buf)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
ipv6_arcnet_mc_map(const struct in6_addr * addr,char * buf)227 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
228 {
229 buf[0] = 0x00;
230 }
231
ipv6_ib_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)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
ipv6_ipgre_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)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
266
