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