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_DAD,
35 INET6_IFADDR_STATE_POSTDAD,
36 INET6_IFADDR_STATE_UP,
37 INET6_IFADDR_STATE_DEAD,
38 };
39
40 struct inet6_ifaddr {
41 struct in6_addr addr;
42 __u32 prefix_len;
43
44 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
45 __u32 valid_lft;
46 __u32 prefered_lft;
47 atomic_t refcnt;
48 spinlock_t lock;
49 spinlock_t state_lock;
50
51 int state;
52
53 __u8 probes;
54 __u8 flags;
55
56 __u16 scope;
57
58 unsigned long cstamp; /* created timestamp */
59 unsigned long tstamp; /* updated timestamp */
60
61 struct timer_list timer;
62
63 struct inet6_dev *idev;
64 struct rt6_info *rt;
65
66 struct hlist_node addr_lst;
67 struct list_head if_list;
68
69 #ifdef CONFIG_IPV6_PRIVACY
70 struct list_head tmp_list;
71 struct inet6_ifaddr *ifpub;
72 int regen_count;
73 #endif
74 bool tokenized;
75
76 struct rcu_head rcu;
77 };
78
79 struct ip6_sf_socklist {
80 unsigned int sl_max;
81 unsigned int sl_count;
82 struct in6_addr sl_addr[0];
83 };
84
85 #define IP6_SFLSIZE(count) (sizeof(struct ip6_sf_socklist) + \
86 (count) * sizeof(struct in6_addr))
87
88 #define IP6_SFBLOCK 10 /* allocate this many at once */
89
90 struct ipv6_mc_socklist {
91 struct in6_addr addr;
92 int ifindex;
93 struct ipv6_mc_socklist __rcu *next;
94 rwlock_t sflock;
95 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
96 struct ip6_sf_socklist *sflist;
97 struct rcu_head rcu;
98 };
99
100 struct ip6_sf_list {
101 struct ip6_sf_list *sf_next;
102 struct in6_addr sf_addr;
103 unsigned long sf_count[2]; /* include/exclude counts */
104 unsigned char sf_gsresp; /* include in g & s response? */
105 unsigned char sf_oldin; /* change state */
106 unsigned char sf_crcount; /* retrans. left to send */
107 };
108
109 #define MAF_TIMER_RUNNING 0x01
110 #define MAF_LAST_REPORTER 0x02
111 #define MAF_LOADED 0x04
112 #define MAF_NOREPORT 0x08
113 #define MAF_GSQUERY 0x10
114
115 struct ifmcaddr6 {
116 struct in6_addr mca_addr;
117 struct inet6_dev *idev;
118 struct ifmcaddr6 *next;
119 struct ip6_sf_list *mca_sources;
120 struct ip6_sf_list *mca_tomb;
121 unsigned int mca_sfmode;
122 unsigned char mca_crcount;
123 unsigned long mca_sfcount[2];
124 struct timer_list mca_timer;
125 unsigned int mca_flags;
126 int mca_users;
127 atomic_t mca_refcnt;
128 spinlock_t mca_lock;
129 unsigned long mca_cstamp;
130 unsigned long mca_tstamp;
131 };
132
133 /* Anycast stuff */
134
135 struct ipv6_ac_socklist {
136 struct in6_addr acl_addr;
137 int acl_ifindex;
138 struct ipv6_ac_socklist *acl_next;
139 };
140
141 struct ifacaddr6 {
142 struct in6_addr aca_addr;
143 struct inet6_dev *aca_idev;
144 struct rt6_info *aca_rt;
145 struct ifacaddr6 *aca_next;
146 int aca_users;
147 atomic_t aca_refcnt;
148 spinlock_t aca_lock;
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 unsigned char mc_qrv;
173 unsigned char mc_gq_running;
174 unsigned char mc_ifc_count;
175 unsigned long mc_v1_seen;
176 unsigned long mc_maxdelay;
177 struct timer_list mc_gq_timer; /* general query timer */
178 struct timer_list mc_ifc_timer; /* interface change timer */
179
180 struct ifacaddr6 *ac_list;
181 rwlock_t lock;
182 atomic_t refcnt;
183 __u32 if_flags;
184 int dead;
185
186 #ifdef CONFIG_IPV6_PRIVACY
187 u8 rndid[8];
188 struct timer_list regen_timer;
189 struct list_head tempaddr_list;
190 #endif
191
192 struct in6_addr token;
193
194 struct neigh_parms *nd_parms;
195 struct inet6_dev *next;
196 struct ipv6_devconf cnf;
197 struct ipv6_devstat stats;
198
199 __s32 rs_interval; /* in jiffies */
200
201 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
202 struct rcu_head rcu;
203 };
204
ipv6_eth_mc_map(const struct in6_addr * addr,char * buf)205 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
206 {
207 /*
208 * +-------+-------+-------+-------+-------+-------+
209 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 |
210 * +-------+-------+-------+-------+-------+-------+
211 */
212
213 buf[0]= 0x33;
214 buf[1]= 0x33;
215
216 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
217 }
218
ipv6_arcnet_mc_map(const struct in6_addr * addr,char * buf)219 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
220 {
221 buf[0] = 0x00;
222 }
223
ipv6_ib_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)224 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
225 const unsigned char *broadcast, char *buf)
226 {
227 unsigned char scope = broadcast[5] & 0xF;
228
229 buf[0] = 0; /* Reserved */
230 buf[1] = 0xff; /* Multicast QPN */
231 buf[2] = 0xff;
232 buf[3] = 0xff;
233 buf[4] = 0xff;
234 buf[5] = 0x10 | scope; /* scope from broadcast address */
235 buf[6] = 0x60; /* IPv6 signature */
236 buf[7] = 0x1b;
237 buf[8] = broadcast[8]; /* P_Key */
238 buf[9] = broadcast[9];
239 memcpy(buf + 10, addr->s6_addr + 6, 10);
240 }
241
ipv6_ipgre_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)242 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
243 const unsigned char *broadcast, char *buf)
244 {
245 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
246 memcpy(buf, broadcast, 4);
247 } else {
248 /* v4mapped? */
249 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
250 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
251 return -EINVAL;
252 memcpy(buf, &addr->s6_addr32[3], 4);
253 }
254 return 0;
255 }
256
257 #endif
258