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 #ifdef __KERNEL__
  34
  35 enum {
  36         INET6_IFADDR_STATE_DAD,
  37         INET6_IFADDR_STATE_POSTDAD,
  38         INET6_IFADDR_STATE_UP,
  39         INET6_IFADDR_STATE_DEAD,
  40 };
  41
  42 struct inet6_ifaddr {
  43         struct in6_addr         addr;
  44         __u32                   prefix_len;
  45
  46         __u32                   valid_lft;
  47         __u32                   prefered_lft;
  48         atomic_t                refcnt;
  49         spinlock_t              lock;
  50         spinlock_t              state_lock;
  51
  52         int                     state;
  53
  54         __u8                    probes;
  55         __u8                    flags;
  56
  57         __u16                   scope;
  58
  59         unsigned long           cstamp; /* created timestamp */
  60         unsigned long           tstamp; /* updated timestamp */
  61
  62         struct timer_list       timer;
  63
  64         struct inet6_dev        *idev;
  65         struct rt6_info         *rt;
  66
  67         struct hlist_node       addr_lst;
  68         struct list_head        if_list;
  69
  70 #ifdef CONFIG_IPV6_PRIVACY
  71         struct list_head        tmp_list;
  72         struct inet6_ifaddr     *ifpub;
  73         int                     regen_count;
  74 #endif
  75         struct rcu_head         rcu;
  76 };
  77
  78 struct ip6_sf_socklist {
  79         unsigned int            sl_max;
  80         unsigned int            sl_count;
  81         struct in6_addr         sl_addr[0];
  82 };
  83
  84 #define IP6_SFLSIZE(count)      (sizeof(struct ip6_sf_socklist) + \
  85         (count) * sizeof(struct in6_addr))
  86
  87 #define IP6_SFBLOCK     10      /* allocate this many at once */
  88
  89 struct ipv6_mc_socklist {
  90         struct in6_addr         addr;
  91         int                     ifindex;
  92         struct ipv6_mc_socklist __rcu *next;
  93         rwlock_t                sflock;
  94         unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
  95         struct ip6_sf_socklist  *sflist;
  96         struct rcu_head         rcu;
  97 };
  98
  99 struct ip6_sf_list {
 100         struct ip6_sf_list      *sf_next;
 101         struct in6_addr         sf_addr;
 102         unsigned long           sf_count[2];    /* include/exclude counts */
 103         unsigned char           sf_gsresp;      /* include in g & s response? */
 104         unsigned char           sf_oldin;       /* change state */
 105         unsigned char           sf_crcount;     /* retrans. left to send */
 106 };
 107
 108 #define MAF_TIMER_RUNNING       0x01
 109 #define MAF_LAST_REPORTER       0x02
 110 #define MAF_LOADED              0x04
 111 #define MAF_NOREPORT            0x08
 112 #define MAF_GSQUERY             0x10
 113
 114 struct ifmcaddr6 {
 115         struct in6_addr         mca_addr;
 116         struct inet6_dev        *idev;
 117         struct ifmcaddr6        *next;
 118         struct ip6_sf_list      *mca_sources;
 119         struct ip6_sf_list      *mca_tomb;
 120         unsigned int            mca_sfmode;
 121         unsigned char           mca_crcount;
 122         unsigned long           mca_sfcount[2];
 123         struct timer_list       mca_timer;
 124         unsigned                mca_flags;
 125         int                     mca_users;
 126         atomic_t                mca_refcnt;
 127         spinlock_t              mca_lock;
 128         unsigned long           mca_cstamp;
 129         unsigned long           mca_tstamp;
 130 };
 131
 132 /* Anycast stuff */
 133
 134 struct ipv6_ac_socklist {
 135         struct in6_addr         acl_addr;
 136         int                     acl_ifindex;
 137         struct ipv6_ac_socklist *acl_next;
 138 };
 139
 140 struct ifacaddr6 {
 141         struct in6_addr         aca_addr;
 142         struct inet6_dev        *aca_idev;
 143         struct rt6_info         *aca_rt;
 144         struct ifacaddr6        *aca_next;
 145         int                     aca_users;
 146         atomic_t                aca_refcnt;
 147         spinlock_t              aca_lock;
 148         unsigned long           aca_cstamp;
 149         unsigned long           aca_tstamp;
 150 };
 151
 152 #define IFA_HOST        IPV6_ADDR_LOOPBACK
 153 #define IFA_LINK        IPV6_ADDR_LINKLOCAL
 154 #define IFA_SITE        IPV6_ADDR_SITELOCAL
 155
 156 struct ipv6_devstat {
 157         struct proc_dir_entry   *proc_dir_entry;
 158         DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
 159         DEFINE_SNMP_STAT(struct icmpv6_mib, icmpv6);
 160         DEFINE_SNMP_STAT(struct icmpv6msg_mib, icmpv6msg);
 161 };
 162
 163 struct inet6_dev {
 164         struct net_device       *dev;
 165
 166         struct list_head        addr_list;
 167
 168         struct ifmcaddr6        *mc_list;
 169         struct ifmcaddr6        *mc_tomb;
 170         spinlock_t              mc_lock;
 171         unsigned char           mc_qrv;
 172         unsigned char           mc_gq_running;
 173         unsigned char           mc_ifc_count;
 174         unsigned long           mc_v1_seen;
 175         unsigned long           mc_maxdelay;
 176         struct timer_list       mc_gq_timer;    /* general query timer */
 177         struct timer_list       mc_ifc_timer;   /* interface change timer */
 178
 179         struct ifacaddr6        *ac_list;
 180         rwlock_t                lock;
 181         atomic_t                refcnt;
 182         __u32                   if_flags;
 183         int                     dead;
 184
 185 #ifdef CONFIG_IPV6_PRIVACY
 186         u8                      rndid[8];
 187         struct timer_list       regen_timer;
 188         struct list_head        tempaddr_list;
 189 #endif
 190
 191         struct neigh_parms      *nd_parms;
 192         struct inet6_dev        *next;
 193         struct ipv6_devconf     cnf;
 194         struct ipv6_devstat     stats;
 195         unsigned long           tstamp; /* ipv6InterfaceTable update timestamp */
 196         struct rcu_head         rcu;
 197 };
 198
 199 static inline void ipv6_eth_mc_map(struct in6_addr *addr, char *buf)
 200 {
 201         /*
 202          *      +-------+-------+-------+-------+-------+-------+
 203          *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
 204          *      +-------+-------+-------+-------+-------+-------+
 205          */
 206
 207         buf[0]= 0x33;
 208         buf[1]= 0x33;
 209
 210         memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
 211 }
 212
 213 static inline void ipv6_tr_mc_map(struct in6_addr *addr, char *buf)
 214 {
 215         /* All nodes FF01::1, FF02::1, FF02::1:FFxx:xxxx */
 216
 217         if (((addr->s6_addr[0] == 0xFF) &&
 218             ((addr->s6_addr[1] == 0x01) || (addr->s6_addr[1] == 0x02)) &&
 219              (addr->s6_addr16[1] == 0) &&
 220              (addr->s6_addr32[1] == 0) &&
 221              (addr->s6_addr32[2] == 0) &&
 222              (addr->s6_addr16[6] == 0) &&
 223              (addr->s6_addr[15] == 1)) ||
 224             ((addr->s6_addr[0] == 0xFF) &&
 225              (addr->s6_addr[1] == 0x02) &&
 226              (addr->s6_addr16[1] == 0) &&
 227              (addr->s6_addr32[1] == 0) &&
 228              (addr->s6_addr16[4] == 0) &&
 229              (addr->s6_addr[10] == 0) &&
 230              (addr->s6_addr[11] == 1) &&
 231              (addr->s6_addr[12] == 0xff)))
 232         {
 233                 buf[0]=0xC0;
 234                 buf[1]=0x00;
 235                 buf[2]=0x01;
 236                 buf[3]=0x00;
 237                 buf[4]=0x00;
 238                 buf[5]=0x00;
 239         /* All routers FF0x::2 */
 240         } else if ((addr->s6_addr[0] ==0xff) &&
 241                 ((addr->s6_addr[1] & 0xF0) == 0) &&
 242                 (addr->s6_addr16[1] == 0) &&
 243                 (addr->s6_addr32[1] == 0) &&
 244                 (addr->s6_addr32[2] == 0) &&
 245                 (addr->s6_addr16[6] == 0) &&
 246                 (addr->s6_addr[15] == 2))
 247         {
 248                 buf[0]=0xC0;
 249                 buf[1]=0x00;
 250                 buf[2]=0x02;
 251                 buf[3]=0x00;
 252                 buf[4]=0x00;
 253                 buf[5]=0x00;
 254         } else {
 255                 unsigned char i ;
 256
 257                 i = addr->s6_addr[15] & 7 ;
 258                 buf[0]=0xC0;
 259                 buf[1]=0x00;
 260                 buf[2]=0x00;
 261                 buf[3]=0x01 << i ;
 262                 buf[4]=0x00;
 263                 buf[5]=0x00;
 264         }
 265 }
 266
 267 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
 268 {
 269         buf[0] = 0x00;
 270 }
 271
 272 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
 273                                   const unsigned char *broadcast, char *buf)
 274 {
 275         unsigned char scope = broadcast[5] & 0xF;
 276
 277         buf[0]  = 0;            /* Reserved */
 278         buf[1]  = 0xff;         /* Multicast QPN */
 279         buf[2]  = 0xff;
 280         buf[3]  = 0xff;
 281         buf[4]  = 0xff;
 282         buf[5]  = 0x10 | scope; /* scope from broadcast address */
 283         buf[6]  = 0x60;         /* IPv6 signature */
 284         buf[7]  = 0x1b;
 285         buf[8]  = broadcast[8]; /* P_Key */
 286         buf[9]  = broadcast[9];
 287         memcpy(buf + 10, addr->s6_addr + 6, 10);
 288 }
 289
 290 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
 291                                     const unsigned char *broadcast, char *buf)
 292 {
 293         if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
 294                 memcpy(buf, broadcast, 4);
 295         } else {
 296                 /* v4mapped? */
 297                 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
 298                      (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
 299                         return -EINVAL;
 300                 memcpy(buf, &addr->s6_addr32[3], 4);
 301         }
 302         return 0;
 303 }
 304
 305 #endif
 306 #endif