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
21 /* inet6_dev.if_flags */
22
23 #define IF_RA_OTHERCONF 0x80
24 #define IF_RA_MANAGED 0x40
25 #define IF_RA_RCVD 0x20
26 #define IF_RS_SENT 0x10
27 #define IF_READY 0x80000000
28
29 /* prefix flags */
30 #define IF_PREFIX_ONLINK 0x01
31 #define IF_PREFIX_AUTOCONF 0x02
32
33 enum {
34 INET6_IFADDR_STATE_PREDAD,
35 INET6_IFADDR_STATE_DAD,
36 INET6_IFADDR_STATE_POSTDAD,
37 INET6_IFADDR_STATE_ERRDAD,
38 INET6_IFADDR_STATE_DEAD,
39 };
40
41 struct inet6_ifaddr {
42 struct in6_addr addr;
43 __u32 prefix_len;
44
45 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
46 __u32 valid_lft;
47 __u32 prefered_lft;
48 atomic_t refcnt;
49 spinlock_t lock;
50
51 int state;
52
53 __u32 flags;
54 __u8 dad_probes;
55 __u8 stable_privacy_retry;
56
57 __u16 scope;
58
59 unsigned long cstamp; /* created timestamp */
60 unsigned long tstamp; /* updated timestamp */
61
62 struct delayed_work dad_work;
63
64 struct inet6_dev *idev;
65 struct rt6_info *rt;
66
67 struct hlist_node addr_lst;
68 struct list_head if_list;
69
70 struct list_head tmp_list;
71 struct inet6_ifaddr *ifpub;
72 int regen_count;
73
74 bool tokenized;
75
76 struct rcu_head rcu;
77 struct in6_addr peer_addr;
78 };
79
80 struct ip6_sf_socklist {
81 unsigned int sl_max;
82 unsigned int sl_count;
83 struct in6_addr sl_addr[0];
84 };
85
86 #define IP6_SFLSIZE(count) (sizeof(struct ip6_sf_socklist) + \
87 (count) * sizeof(struct in6_addr))
88
89 #define IP6_SFBLOCK 10 /* allocate this many at once */
90
91 struct ipv6_mc_socklist {
92 struct in6_addr addr;
93 int ifindex;
94 struct ipv6_mc_socklist __rcu *next;
95 rwlock_t sflock;
96 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
97 struct ip6_sf_socklist *sflist;
98 struct rcu_head rcu;
99 };
100
101 struct ip6_sf_list {
102 struct ip6_sf_list *sf_next;
103 struct in6_addr sf_addr;
104 unsigned long sf_count[2]; /* include/exclude counts */
105 unsigned char sf_gsresp; /* include in g & s response? */
106 unsigned char sf_oldin; /* change state */
107 unsigned char sf_crcount; /* retrans. left to send */
108 };
109
110 #define MAF_TIMER_RUNNING 0x01
111 #define MAF_LAST_REPORTER 0x02
112 #define MAF_LOADED 0x04
113 #define MAF_NOREPORT 0x08
114 #define MAF_GSQUERY 0x10
115
116 struct ifmcaddr6 {
117 struct in6_addr mca_addr;
118 struct inet6_dev *idev;
119 struct ifmcaddr6 *next;
120 struct ip6_sf_list *mca_sources;
121 struct ip6_sf_list *mca_tomb;
122 unsigned int mca_sfmode;
123 unsigned char mca_crcount;
124 unsigned long mca_sfcount[2];
125 struct timer_list mca_timer;
126 unsigned int mca_flags;
127 int mca_users;
128 atomic_t mca_refcnt;
129 spinlock_t mca_lock;
130 unsigned long mca_cstamp;
131 unsigned long mca_tstamp;
132 };
133
134 /* Anycast stuff */
135
136 struct ipv6_ac_socklist {
137 struct in6_addr acl_addr;
138 int acl_ifindex;
139 struct ipv6_ac_socklist *acl_next;
140 };
141
142 struct ifacaddr6 {
143 struct in6_addr aca_addr;
144 struct inet6_dev *aca_idev;
145 struct rt6_info *aca_rt;
146 struct ifacaddr6 *aca_next;
147 int aca_users;
148 atomic_t aca_refcnt;
149 unsigned long aca_cstamp;
150 unsigned long aca_tstamp;
151 };
152
153 #define IFA_HOST IPV6_ADDR_LOOPBACK
154 #define IFA_LINK IPV6_ADDR_LINKLOCAL
155 #define IFA_SITE IPV6_ADDR_SITELOCAL
156
157 struct ipv6_devstat {
158 struct proc_dir_entry *proc_dir_entry;
159 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
160 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
161 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
162 };
163
164 struct inet6_dev {
165 struct net_device *dev;
166
167 struct list_head addr_list;
168
169 struct ifmcaddr6 *mc_list;
170 struct ifmcaddr6 *mc_tomb;
171 spinlock_t mc_lock;
172
173 unsigned char mc_qrv; /* Query Robustness Variable */
174 unsigned char mc_gq_running;
175 unsigned char mc_ifc_count;
176 unsigned char mc_dad_count;
177
178 unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */
179 unsigned long mc_qi; /* Query Interval */
180 unsigned long mc_qri; /* Query Response Interval */
181 unsigned long mc_maxdelay;
182
183 struct timer_list mc_gq_timer; /* general query timer */
184 struct timer_list mc_ifc_timer; /* interface change timer */
185 struct timer_list mc_dad_timer; /* dad complete mc timer */
186
187 struct ifacaddr6 *ac_list;
188 rwlock_t lock;
189 atomic_t refcnt;
190 __u32 if_flags;
191 int dead;
192
193 u32 desync_factor;
194 u8 rndid[8];
195 struct list_head tempaddr_list;
196
197 struct in6_addr token;
198
199 struct neigh_parms *nd_parms;
200 struct ipv6_devconf cnf;
201 struct ipv6_devstat stats;
202
203 struct timer_list rs_timer;
204 __s32 rs_interval; /* in jiffies */
205 __u8 rs_probes;
206
207 __u8 addr_gen_mode;
208 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
209 struct rcu_head rcu;
210 };
211
ipv6_eth_mc_map(const struct in6_addr * addr,char * buf)212 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
213 {
214 /*
215 * +-------+-------+-------+-------+-------+-------+
216 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 |
217 * +-------+-------+-------+-------+-------+-------+
218 */
219
220 buf[0]= 0x33;
221 buf[1]= 0x33;
222
223 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
224 }
225
ipv6_arcnet_mc_map(const struct in6_addr * addr,char * buf)226 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
227 {
228 buf[0] = 0x00;
229 }
230
ipv6_ib_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)231 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
232 const unsigned char *broadcast, char *buf)
233 {
234 unsigned char scope = broadcast[5] & 0xF;
235
236 buf[0] = 0; /* Reserved */
237 buf[1] = 0xff; /* Multicast QPN */
238 buf[2] = 0xff;
239 buf[3] = 0xff;
240 buf[4] = 0xff;
241 buf[5] = 0x10 | scope; /* scope from broadcast address */
242 buf[6] = 0x60; /* IPv6 signature */
243 buf[7] = 0x1b;
244 buf[8] = broadcast[8]; /* P_Key */
245 buf[9] = broadcast[9];
246 memcpy(buf + 10, addr->s6_addr + 6, 10);
247 }
248
ipv6_ipgre_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)249 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
250 const unsigned char *broadcast, char *buf)
251 {
252 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
253 memcpy(buf, broadcast, 4);
254 } else {
255 /* v4mapped? */
256 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
257 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
258 return -EINVAL;
259 memcpy(buf, &addr->s6_addr32[3], 4);
260 }
261 return 0;
262 }
263
264 #endif
265