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Linux/include/net/if_inet6.h

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  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 
 46         /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
 47         __u32                   valid_lft;
 48         __u32                   prefered_lft;
 49         refcount_t              refcnt;
 50         spinlock_t              lock;
 51 
 52         int                     state;
 53 
 54         __u32                   flags;
 55         __u8                    dad_probes;
 56         __u8                    stable_privacy_retry;
 57 
 58         __u16                   scope;
 59         __u64                   dad_nonce;
 60 
 61         unsigned long           cstamp; /* created timestamp */
 62         unsigned long           tstamp; /* updated timestamp */
 63 
 64         struct delayed_work     dad_work;
 65 
 66         struct inet6_dev        *idev;
 67         struct rt6_info         *rt;
 68 
 69         struct hlist_node       addr_lst;
 70         struct list_head        if_list;
 71 
 72         struct list_head        tmp_list;
 73         struct inet6_ifaddr     *ifpub;
 74         int                     regen_count;
 75 
 76         bool                    tokenized;
 77 
 78         struct rcu_head         rcu;
 79         struct in6_addr         peer_addr;
 80 };
 81 
 82 struct ip6_sf_socklist {
 83         unsigned int            sl_max;
 84         unsigned int            sl_count;
 85         struct in6_addr         sl_addr[0];
 86 };
 87 
 88 #define IP6_SFLSIZE(count)      (sizeof(struct ip6_sf_socklist) + \
 89         (count) * sizeof(struct in6_addr))
 90 
 91 #define IP6_SFBLOCK     10      /* allocate this many at once */
 92 
 93 struct ipv6_mc_socklist {
 94         struct in6_addr         addr;
 95         int                     ifindex;
 96         struct ipv6_mc_socklist __rcu *next;
 97         rwlock_t                sflock;
 98         unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
 99         struct ip6_sf_socklist  *sflist;
100         struct rcu_head         rcu;
101 };
102 
103 struct ip6_sf_list {
104         struct ip6_sf_list      *sf_next;
105         struct in6_addr         sf_addr;
106         unsigned long           sf_count[2];    /* include/exclude counts */
107         unsigned char           sf_gsresp;      /* include in g & s response? */
108         unsigned char           sf_oldin;       /* change state */
109         unsigned char           sf_crcount;     /* retrans. left to send */
110 };
111 
112 #define MAF_TIMER_RUNNING       0x01
113 #define MAF_LAST_REPORTER       0x02
114 #define MAF_LOADED              0x04
115 #define MAF_NOREPORT            0x08
116 #define MAF_GSQUERY             0x10
117 
118 struct ifmcaddr6 {
119         struct in6_addr         mca_addr;
120         struct inet6_dev        *idev;
121         struct ifmcaddr6        *next;
122         struct ip6_sf_list      *mca_sources;
123         struct ip6_sf_list      *mca_tomb;
124         unsigned int            mca_sfmode;
125         unsigned char           mca_crcount;
126         unsigned long           mca_sfcount[2];
127         struct timer_list       mca_timer;
128         unsigned int            mca_flags;
129         int                     mca_users;
130         refcount_t              mca_refcnt;
131         spinlock_t              mca_lock;
132         unsigned long           mca_cstamp;
133         unsigned long           mca_tstamp;
134 };
135 
136 /* Anycast stuff */
137 
138 struct ipv6_ac_socklist {
139         struct in6_addr         acl_addr;
140         int                     acl_ifindex;
141         struct ipv6_ac_socklist *acl_next;
142 };
143 
144 struct ifacaddr6 {
145         struct in6_addr         aca_addr;
146         struct inet6_dev        *aca_idev;
147         struct rt6_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 
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 
227 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
228 {
229         buf[0] = 0x00;
230 }
231 
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 
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 

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