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