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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 
 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         __u64                   dad_nonce;
 59 
 60         unsigned long           cstamp; /* created timestamp */
 61         unsigned long           tstamp; /* updated timestamp */
 62 
 63         struct delayed_work     dad_work;
 64 
 65         struct inet6_dev        *idev;
 66         struct rt6_info         *rt;
 67 
 68         struct hlist_node       addr_lst;
 69         struct list_head        if_list;
 70 
 71         struct list_head        tmp_list;
 72         struct inet6_ifaddr     *ifpub;
 73         int                     regen_count;
 74 
 75         bool                    tokenized;
 76 
 77         struct rcu_head         rcu;
 78         struct in6_addr         peer_addr;
 79 };
 80 
 81 struct ip6_sf_socklist {
 82         unsigned int            sl_max;
 83         unsigned int            sl_count;
 84         struct in6_addr         sl_addr[0];
 85 };
 86 
 87 #define IP6_SFLSIZE(count)      (sizeof(struct ip6_sf_socklist) + \
 88         (count) * sizeof(struct in6_addr))
 89 
 90 #define IP6_SFBLOCK     10      /* allocate this many at once */
 91 
 92 struct ipv6_mc_socklist {
 93         struct in6_addr         addr;
 94         int                     ifindex;
 95         struct ipv6_mc_socklist __rcu *next;
 96         rwlock_t                sflock;
 97         unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
 98         struct ip6_sf_socklist  *sflist;
 99         struct rcu_head         rcu;
100 };
101 
102 struct ip6_sf_list {
103         struct ip6_sf_list      *sf_next;
104         struct in6_addr         sf_addr;
105         unsigned long           sf_count[2];    /* include/exclude counts */
106         unsigned char           sf_gsresp;      /* include in g & s response? */
107         unsigned char           sf_oldin;       /* change state */
108         unsigned char           sf_crcount;     /* retrans. left to send */
109 };
110 
111 #define MAF_TIMER_RUNNING       0x01
112 #define MAF_LAST_REPORTER       0x02
113 #define MAF_LOADED              0x04
114 #define MAF_NOREPORT            0x08
115 #define MAF_GSQUERY             0x10
116 
117 struct ifmcaddr6 {
118         struct in6_addr         mca_addr;
119         struct inet6_dev        *idev;
120         struct ifmcaddr6        *next;
121         struct ip6_sf_list      *mca_sources;
122         struct ip6_sf_list      *mca_tomb;
123         unsigned int            mca_sfmode;
124         unsigned char           mca_crcount;
125         unsigned long           mca_sfcount[2];
126         struct timer_list       mca_timer;
127         unsigned int            mca_flags;
128         int                     mca_users;
129         atomic_t                mca_refcnt;
130         spinlock_t              mca_lock;
131         unsigned long           mca_cstamp;
132         unsigned long           mca_tstamp;
133 };
134 
135 /* Anycast stuff */
136 
137 struct ipv6_ac_socklist {
138         struct in6_addr         acl_addr;
139         int                     acl_ifindex;
140         struct ipv6_ac_socklist *acl_next;
141 };
142 
143 struct ifacaddr6 {
144         struct in6_addr         aca_addr;
145         struct inet6_dev        *aca_idev;
146         struct rt6_info         *aca_rt;
147         struct ifacaddr6        *aca_next;
148         int                     aca_users;
149         atomic_t                aca_refcnt;
150         unsigned long           aca_cstamp;
151         unsigned long           aca_tstamp;
152 };
153 
154 #define IFA_HOST        IPV6_ADDR_LOOPBACK
155 #define IFA_LINK        IPV6_ADDR_LINKLOCAL
156 #define IFA_SITE        IPV6_ADDR_SITELOCAL
157 
158 struct ipv6_devstat {
159         struct proc_dir_entry   *proc_dir_entry;
160         DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
161         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
162         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
163 };
164 
165 struct inet6_dev {
166         struct net_device       *dev;
167 
168         struct list_head        addr_list;
169 
170         struct ifmcaddr6        *mc_list;
171         struct ifmcaddr6        *mc_tomb;
172         spinlock_t              mc_lock;
173 
174         unsigned char           mc_qrv;         /* Query Robustness Variable */
175         unsigned char           mc_gq_running;
176         unsigned char           mc_ifc_count;
177         unsigned char           mc_dad_count;
178 
179         unsigned long           mc_v1_seen;     /* Max time we stay in MLDv1 mode */
180         unsigned long           mc_qi;          /* Query Interval */
181         unsigned long           mc_qri;         /* Query Response Interval */
182         unsigned long           mc_maxdelay;
183 
184         struct timer_list       mc_gq_timer;    /* general query timer */
185         struct timer_list       mc_ifc_timer;   /* interface change timer */
186         struct timer_list       mc_dad_timer;   /* dad complete mc timer */
187 
188         struct ifacaddr6        *ac_list;
189         rwlock_t                lock;
190         atomic_t                refcnt;
191         __u32                   if_flags;
192         int                     dead;
193 
194         u32                     desync_factor;
195         u8                      rndid[8];
196         struct list_head        tempaddr_list;
197 
198         struct in6_addr         token;
199 
200         struct neigh_parms      *nd_parms;
201         struct ipv6_devconf     cnf;
202         struct ipv6_devstat     stats;
203 
204         struct timer_list       rs_timer;
205         __s32                   rs_interval;    /* in jiffies */
206         __u8                    rs_probes;
207 
208         unsigned long           tstamp; /* ipv6InterfaceTable update timestamp */
209         struct rcu_head         rcu;
210 };
211 
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 
226 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
227 {
228         buf[0] = 0x00;
229 }
230 
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 
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 

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