include/net/if_inet6.h

   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         __u32                   valid_lft;
  45         __u32                   prefered_lft;
  46         atomic_t                refcnt;
  47         spinlock_t              lock;
  48         spinlock_t              state_lock;
  49
  50         int                     state;
  51
  52         __u8                    probes;
  53         __u8                    flags;
  54
  55         __u16                   scope;
  56
  57         unsigned long           cstamp; /* created timestamp */
  58         unsigned long           tstamp; /* updated timestamp */
  59
  60         struct timer_list       timer;
  61
  62         struct inet6_dev        *idev;
  63         struct rt6_info         *rt;
  64
  65         struct hlist_node       addr_lst;
  66         struct list_head        if_list;
  67
  68 #ifdef CONFIG_IPV6_PRIVACY
  69         struct list_head        tmp_list;
  70         struct inet6_ifaddr     *ifpub;
  71         int                     regen_count;
  72 #endif
  73         struct rcu_head         rcu;
  74 };
  75
  76 struct ip6_sf_socklist {
  77         unsigned int            sl_max;
  78         unsigned int            sl_count;
  79         struct in6_addr         sl_addr[0];
  80 };
  81
  82 #define IP6_SFLSIZE(count)      (sizeof(struct ip6_sf_socklist) + \
  83         (count) * sizeof(struct in6_addr))
  84
  85 #define IP6_SFBLOCK     10      /* allocate this many at once */
  86
  87 struct ipv6_mc_socklist {
  88         struct in6_addr         addr;
  89         int                     ifindex;
  90         struct ipv6_mc_socklist __rcu *next;
  91         rwlock_t                sflock;
  92         unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
  93         struct ip6_sf_socklist  *sflist;
  94         struct rcu_head         rcu;
  95 };
  96
  97 struct ip6_sf_list {
  98         struct ip6_sf_list      *sf_next;
  99         struct in6_addr         sf_addr;
 100         unsigned long           sf_count[2];    /* include/exclude counts */
 101         unsigned char           sf_gsresp;      /* include in g & s response? */
 102         unsigned char           sf_oldin;       /* change state */
 103         unsigned char           sf_crcount;     /* retrans. left to send */
 104 };
 105
 106 #define MAF_TIMER_RUNNING       0x01
 107 #define MAF_LAST_REPORTER       0x02
 108 #define MAF_LOADED              0x04
 109 #define MAF_NOREPORT            0x08
 110 #define MAF_GSQUERY             0x10
 111
 112 struct ifmcaddr6 {
 113         struct in6_addr         mca_addr;
 114         struct inet6_dev        *idev;
 115         struct ifmcaddr6        *next;
 116         struct ip6_sf_list      *mca_sources;
 117         struct ip6_sf_list      *mca_tomb;
 118         unsigned int            mca_sfmode;
 119         unsigned char           mca_crcount;
 120         unsigned long           mca_sfcount[2];
 121         struct timer_list       mca_timer;
 122         unsigned                mca_flags;
 123         int                     mca_users;
 124         atomic_t                mca_refcnt;
 125         spinlock_t              mca_lock;
 126         unsigned long           mca_cstamp;
 127         unsigned long           mca_tstamp;
 128 };
 129
 130 /* Anycast stuff */
 131
 132 struct ipv6_ac_socklist {
 133         struct in6_addr         acl_addr;
 134         int                     acl_ifindex;
 135         struct ipv6_ac_socklist *acl_next;
 136 };
 137
 138 struct ifacaddr6 {
 139         struct in6_addr         aca_addr;
 140         struct inet6_dev        *aca_idev;
 141         struct rt6_info         *aca_rt;
 142         struct ifacaddr6        *aca_next;
 143         int                     aca_users;
 144         atomic_t                aca_refcnt;
 145         spinlock_t              aca_lock;
 146         unsigned long           aca_cstamp;
 147         unsigned long           aca_tstamp;
 148 };
 149
 150 #define IFA_HOST        IPV6_ADDR_LOOPBACK
 151 #define IFA_LINK        IPV6_ADDR_LINKLOCAL
 152 #define IFA_SITE        IPV6_ADDR_SITELOCAL
 153
 154 struct ipv6_devstat {
 155         struct proc_dir_entry   *proc_dir_entry;
 156         DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
 157         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
 158         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
 159 };
 160
 161 struct inet6_dev {
 162         struct net_device       *dev;
 163
 164         struct list_head        addr_list;
 165
 166         struct ifmcaddr6        *mc_list;
 167         struct ifmcaddr6        *mc_tomb;
 168         spinlock_t              mc_lock;
 169         unsigned char           mc_qrv;
 170         unsigned char           mc_gq_running;
 171         unsigned char           mc_ifc_count;
 172         unsigned long           mc_v1_seen;
 173         unsigned long           mc_maxdelay;
 174         struct timer_list       mc_gq_timer;    /* general query timer */
 175         struct timer_list       mc_ifc_timer;   /* interface change timer */
 176
 177         struct ifacaddr6        *ac_list;
 178         rwlock_t                lock;
 179         atomic_t                refcnt;
 180         __u32                   if_flags;
 181         int                     dead;
 182
 183 #ifdef CONFIG_IPV6_PRIVACY
 184         u8                      rndid[8];
 185         struct timer_list       regen_timer;
 186         struct list_head        tempaddr_list;
 187 #endif
 188
 189         struct neigh_parms      *nd_parms;
 190         struct inet6_dev        *next;
 191         struct ipv6_devconf     cnf;
 192         struct ipv6_devstat     stats;
 193         unsigned long           tstamp; /* ipv6InterfaceTable update timestamp */
 194         struct rcu_head         rcu;
 195 };
 196
 197 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
 198 {
 199         /*
 200          *      +-------+-------+-------+-------+-------+-------+
 201          *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
 202          *      +-------+-------+-------+-------+-------+-------+
 203          */
 204
 205         buf[0]= 0x33;
 206         buf[1]= 0x33;
 207
 208         memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
 209 }
 210
 211 static inline void ipv6_tr_mc_map(const struct in6_addr *addr, char *buf)
 212 {
 213         /* All nodes FF01::1, FF02::1, FF02::1:FFxx:xxxx */
 214
 215         if (((addr->s6_addr[0] == 0xFF) &&
 216             ((addr->s6_addr[1] == 0x01) || (addr->s6_addr[1] == 0x02)) &&
 217              (addr->s6_addr16[1] == 0) &&
 218              (addr->s6_addr32[1] == 0) &&
 219              (addr->s6_addr32[2] == 0) &&
 220              (addr->s6_addr16[6] == 0) &&
 221              (addr->s6_addr[15] == 1)) ||
 222             ((addr->s6_addr[0] == 0xFF) &&
 223              (addr->s6_addr[1] == 0x02) &&
 224              (addr->s6_addr16[1] == 0) &&
 225              (addr->s6_addr32[1] == 0) &&
 226              (addr->s6_addr16[4] == 0) &&
 227              (addr->s6_addr[10] == 0) &&
 228              (addr->s6_addr[11] == 1) &&
 229              (addr->s6_addr[12] == 0xff)))
 230         {
 231                 buf[0]=0xC0;
 232                 buf[1]=0x00;
 233                 buf[2]=0x01;
 234                 buf[3]=0x00;
 235                 buf[4]=0x00;
 236                 buf[5]=0x00;
 237         /* All routers FF0x::2 */
 238         } else if ((addr->s6_addr[0] ==0xff) &&
 239                 ((addr->s6_addr[1] & 0xF0) == 0) &&
 240                 (addr->s6_addr16[1] == 0) &&
 241                 (addr->s6_addr32[1] == 0) &&
 242                 (addr->s6_addr32[2] == 0) &&
 243                 (addr->s6_addr16[6] == 0) &&
 244                 (addr->s6_addr[15] == 2))
 245         {
 246                 buf[0]=0xC0;
 247                 buf[1]=0x00;
 248                 buf[2]=0x02;
 249                 buf[3]=0x00;
 250                 buf[4]=0x00;
 251                 buf[5]=0x00;
 252         } else {
 253                 unsigned char i ;
 254
 255                 i = addr->s6_addr[15] & 7 ;
 256                 buf[0]=0xC0;
 257                 buf[1]=0x00;
 258                 buf[2]=0x00;
 259                 buf[3]=0x01 << i ;
 260                 buf[4]=0x00;
 261                 buf[5]=0x00;
 262         }
 263 }
 264
 265 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
 266 {
 267         buf[0] = 0x00;
 268 }
 269
 270 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
 271                                   const unsigned char *broadcast, char *buf)
 272 {
 273         unsigned char scope = broadcast[5] & 0xF;
 274
 275         buf[0]  = 0;            /* Reserved */
 276         buf[1]  = 0xff;         /* Multicast QPN */
 277         buf[2]  = 0xff;
 278         buf[3]  = 0xff;
 279         buf[4]  = 0xff;
 280         buf[5]  = 0x10 | scope; /* scope from broadcast address */
 281         buf[6]  = 0x60;         /* IPv6 signature */
 282         buf[7]  = 0x1b;
 283         buf[8]  = broadcast[8]; /* P_Key */
 284         buf[9]  = broadcast[9];
 285         memcpy(buf + 10, addr->s6_addr + 6, 10);
 286 }
 287
 288 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
 289                                     const unsigned char *broadcast, char *buf)
 290 {
 291         if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
 292                 memcpy(buf, broadcast, 4);
 293         } else {
 294                 /* v4mapped? */
 295                 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
 296                      (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
 297                         return -EINVAL;
 298                 memcpy(buf, &addr->s6_addr32[3], 4);
 299         }
 300         return 0;
 301 }
 302
 303 #endif