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if_inet6.h
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1 /*
2  * inet6 interface/address list definitions
3  * Linux INET6 implementation
4  *
5  * Authors:
6  * Pedro Roque <[email protected]>
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  struct rcu_head rcu;
75 };
76 
77 struct ip6_sf_socklist {
78  unsigned int sl_max;
79  unsigned int sl_count;
80  struct in6_addr sl_addr[0];
81 };
82 
83 #define IP6_SFLSIZE(count) (sizeof(struct ip6_sf_socklist) + \
84  (count) * sizeof(struct in6_addr))
85 
86 #define IP6_SFBLOCK 10 /* allocate this many at once */
87 
88 struct ipv6_mc_socklist {
89  struct in6_addr addr;
90  int ifindex;
91  struct ipv6_mc_socklist __rcu *next;
92  rwlock_t sflock;
93  unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
94  struct ip6_sf_socklist *sflist;
95  struct rcu_head rcu;
96 };
97 
98 struct ip6_sf_list {
99  struct ip6_sf_list *sf_next;
100  struct in6_addr sf_addr;
101  unsigned long sf_count[2]; /* include/exclude counts */
102  unsigned char sf_gsresp; /* include in g & s response? */
103  unsigned char sf_oldin; /* change state */
104  unsigned char sf_crcount; /* retrans. left to send */
105 };
106 
107 #define MAF_TIMER_RUNNING 0x01
108 #define MAF_LAST_REPORTER 0x02
109 #define MAF_LOADED 0x04
110 #define MAF_NOREPORT 0x08
111 #define MAF_GSQUERY 0x10
112 
113 struct ifmcaddr6 {
114  struct in6_addr mca_addr;
115  struct inet6_dev *idev;
116  struct ifmcaddr6 *next;
117  struct ip6_sf_list *mca_sources;
118  struct ip6_sf_list *mca_tomb;
119  unsigned int mca_sfmode;
120  unsigned char mca_crcount;
121  unsigned long mca_sfcount[2];
122  struct timer_list mca_timer;
123  unsigned int mca_flags;
124  int mca_users;
125  atomic_t mca_refcnt;
126  spinlock_t mca_lock;
127  unsigned long mca_cstamp;
128  unsigned long mca_tstamp;
129 };
130 
131 /* Anycast stuff */
132 
133 struct ipv6_ac_socklist {
134  struct in6_addr acl_addr;
135  int acl_ifindex;
136  struct ipv6_ac_socklist *acl_next;
137 };
138 
139 struct ifacaddr6 {
140  struct in6_addr aca_addr;
141  struct inet6_dev *aca_idev;
142  struct rt6_info *aca_rt;
143  struct ifacaddr6 *aca_next;
144  int aca_users;
145  atomic_t aca_refcnt;
146  spinlock_t aca_lock;
147  unsigned long aca_cstamp;
148  unsigned long aca_tstamp;
149 };
150 
151 #define IFA_HOST IPV6_ADDR_LOOPBACK
152 #define IFA_LINK IPV6_ADDR_LINKLOCAL
153 #define IFA_SITE IPV6_ADDR_SITELOCAL
154 
155 struct ipv6_devstat {
156  struct proc_dir_entry *proc_dir_entry;
157  DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
158  DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
159  DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
160 };
161 
162 struct inet6_dev {
163  struct net_device *dev;
164 
165  struct list_head addr_list;
166 
167  struct ifmcaddr6 *mc_list;
168  struct ifmcaddr6 *mc_tomb;
169  spinlock_t mc_lock;
170  unsigned char mc_qrv;
171  unsigned char mc_gq_running;
172  unsigned char mc_ifc_count;
173  unsigned long mc_v1_seen;
174  unsigned long mc_maxdelay;
175  struct timer_list mc_gq_timer; /* general query timer */
176  struct timer_list mc_ifc_timer; /* interface change timer */
177 
178  struct ifacaddr6 *ac_list;
179  rwlock_t lock;
180  atomic_t refcnt;
181  __u32 if_flags;
182  int dead;
183 
184 #ifdef CONFIG_IPV6_PRIVACY
185  u8 rndid[8];
186  struct timer_list regen_timer;
187  struct list_head tempaddr_list;
188 #endif
189 
190  struct neigh_parms *nd_parms;
191  struct inet6_dev *next;
192  struct ipv6_devconf cnf;
193  struct ipv6_devstat stats;
194  unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
195  struct rcu_head rcu;
196 };
197 
198 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
199 {
200  /*
201  * +-------+-------+-------+-------+-------+-------+
202  * | 33 | 33 | DST13 | DST14 | DST15 | DST16 |
203  * +-------+-------+-------+-------+-------+-------+
204  */
205 
206  buf[0]= 0x33;
207  buf[1]= 0x33;
208 
209  memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
210 }
211 
212 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
213 {
214  buf[0] = 0x00;
215 }
216 
217 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
218  const unsigned char *broadcast, char *buf)
219 {
220  unsigned char scope = broadcast[5] & 0xF;
221 
222  buf[0] = 0; /* Reserved */
223  buf[1] = 0xff; /* Multicast QPN */
224  buf[2] = 0xff;
225  buf[3] = 0xff;
226  buf[4] = 0xff;
227  buf[5] = 0x10 | scope; /* scope from broadcast address */
228  buf[6] = 0x60; /* IPv6 signature */
229  buf[7] = 0x1b;
230  buf[8] = broadcast[8]; /* P_Key */
231  buf[9] = broadcast[9];
232  memcpy(buf + 10, addr->s6_addr + 6, 10);
233 }
234 
235 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
236  const unsigned char *broadcast, char *buf)
237 {
238  if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
239  memcpy(buf, broadcast, 4);
240  } else {
241  /* v4mapped? */
242  if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
243  (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
244  return -EINVAL;
245  memcpy(buf, &addr->s6_addr32[3], 4);
246  }
247  return 0;
248 }
249 
250 #endif
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