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
  28 /* prefix flags */
  29 #define IF_PREFIX_ONLINK        0x01
  30 #define IF_PREFIX_AUTOCONF      0x02
  31
  32 #ifdef __KERNEL__
  33
  34 struct inet6_ifaddr
  35 {
  36         struct in6_addr         addr;
  37         __u32                   prefix_len;
  38
  39         __u32                   valid_lft;
  40         __u32                   prefered_lft;
  41         unsigned long           cstamp; /* created timestamp */
  42         unsigned long           tstamp; /* updated timestamp */
  43         atomic_t                refcnt;
  44         spinlock_t              lock;
  45
  46         __u8                    probes;
  47         __u8                    flags;
  48
  49         __u16                   scope;
  50
  51         struct timer_list       timer;
  52
  53         struct inet6_dev        *idev;
  54
  55         struct inet6_ifaddr     *lst_next;      /* next addr in addr_lst */
  56         struct inet6_ifaddr     *if_next;       /* next addr in inet6_dev */
  57
  58 #ifdef CONFIG_IPV6_PRIVACY
  59         struct inet6_ifaddr     *tmp_next;      /* next addr in tempaddr_lst */
  60         struct inet6_ifaddr     *ifpub;
  61         int                     regen_count;
  62 #endif
  63
  64         int                     dead;
  65 };
  66
  67 struct ip6_sf_socklist
  68 {
  69         unsigned int            sl_max;
  70         unsigned int            sl_count;
  71         struct in6_addr         sl_addr[0];
  72 };
  73
  74 #define IP6_SFLSIZE(count)      (sizeof(struct ip6_sf_socklist) + \
  75         (count) * sizeof(struct in6_addr))
  76
  77 #define IP6_SFBLOCK     10      /* allocate this many at once */
  78
  79 struct ipv6_mc_socklist
  80 {
  81         struct in6_addr         addr;
  82         int                     ifindex;
  83         struct ipv6_mc_socklist *next;
  84         unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
  85         struct ip6_sf_socklist  *sflist;
  86 };
  87
  88 struct ip6_sf_list
  89 {
  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 {
 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 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 char           mca_crcount;
 119         unsigned long           mca_cstamp;
 120         unsigned long           mca_tstamp;
 121 };
 122
 123 /* Anycast stuff */
 124
 125 struct ipv6_ac_socklist
 126 {
 127         struct in6_addr         acl_addr;
 128         int                     acl_ifindex;
 129         struct ipv6_ac_socklist *acl_next;
 130 };
 131
 132 struct ifacaddr6
 133 {
 134         struct in6_addr         aca_addr;
 135         struct inet6_dev        *aca_idev;
 136         struct ifacaddr6        *aca_next;
 137         int                     aca_users;
 138         atomic_t                aca_refcnt;
 139         spinlock_t              aca_lock;
 140         unsigned long           aca_cstamp;
 141         unsigned long           aca_tstamp;
 142 };
 143
 144 #define IFA_HOST        IPV6_ADDR_LOOPBACK
 145 #define IFA_LINK        IPV6_ADDR_LINKLOCAL
 146 #define IFA_SITE        IPV6_ADDR_SITELOCAL
 147 #define IFA_GLOBAL      0x0000U
 148
 149 struct ipv6_devstat {
 150         struct proc_dir_entry   *proc_dir_entry;
 151         DEFINE_SNMP_STAT(struct icmpv6_mib, icmpv6);
 152 };
 153
 154 struct inet6_dev
 155 {
 156         struct net_device               *dev;
 157
 158         struct inet6_ifaddr     *addr_list;
 159
 160         struct ifmcaddr6        *mc_list;
 161         struct ifmcaddr6        *mc_tomb;
 162         rwlock_t                mc_lock;
 163         unsigned long           mc_v1_seen;
 164         unsigned long           mc_maxdelay;
 165         unsigned char           mc_qrv;
 166         unsigned char           mc_gq_running;
 167         unsigned char           mc_ifc_count;
 168         struct timer_list       mc_gq_timer;    /* general query timer */
 169         struct timer_list       mc_ifc_timer;   /* interface change timer */
 170
 171         struct ifacaddr6        *ac_list;
 172         rwlock_t                lock;
 173         atomic_t                refcnt;
 174         __u32                   if_flags;
 175         int                     dead;
 176
 177 #ifdef CONFIG_IPV6_PRIVACY
 178         u8                      rndid[8];
 179         u8                      entropy[8];
 180         struct timer_list       regen_timer;
 181         struct inet6_ifaddr     *tempaddr_list;
 182         __u8                    work_eui64[8];
 183         __u8                    work_digest[16];
 184 #endif
 185
 186         struct neigh_parms      *nd_parms;
 187         struct inet6_dev        *next;
 188         struct ipv6_devconf     cnf;
 189         struct ipv6_devstat     stats;
 190         unsigned long           tstamp; /* ipv6InterfaceTable update timestamp */
 191 };
 192
 193 extern struct ipv6_devconf ipv6_devconf;
 194
 195 static inline void ipv6_eth_mc_map(struct in6_addr *addr, char *buf)
 196 {
 197         /*
 198          *      +-------+-------+-------+-------+-------+-------+
 199          *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
 200          *      +-------+-------+-------+-------+-------+-------+
 201          */
 202
 203         buf[0]= 0x33;
 204         buf[1]= 0x33;
 205
 206         memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
 207 }
 208
 209 static inline void ipv6_tr_mc_map(struct in6_addr *addr, char *buf)
 210 {
 211         /* All nodes FF01::1, FF02::1, FF02::1:FFxx:xxxx */
 212
 213         if (((addr->s6_addr[0] == 0xFF) &&
 214             ((addr->s6_addr[1] == 0x01) || (addr->s6_addr[1] == 0x02)) &&
 215              (addr->s6_addr16[1] == 0) &&
 216              (addr->s6_addr32[1] == 0) &&
 217              (addr->s6_addr32[2] == 0) &&
 218              (addr->s6_addr16[6] == 0) &&
 219              (addr->s6_addr[15] == 1)) ||
 220             ((addr->s6_addr[0] == 0xFF) &&
 221              (addr->s6_addr[1] == 0x02) &&
 222              (addr->s6_addr16[1] == 0) &&
 223              (addr->s6_addr32[1] == 0) &&
 224              (addr->s6_addr16[4] == 0) &&
 225              (addr->s6_addr[10] == 0) &&
 226              (addr->s6_addr[11] == 1) &&
 227              (addr->s6_addr[12] == 0xff)))
 228         {
 229                 buf[0]=0xC0;
 230                 buf[1]=0x00;
 231                 buf[2]=0x01;
 232                 buf[3]=0x00;
 233                 buf[4]=0x00;
 234                 buf[5]=0x00;
 235         /* All routers FF0x::2 */
 236         } else if ((addr->s6_addr[0] ==0xff) &&
 237                 ((addr->s6_addr[1] & 0xF0) == 0) &&
 238                 (addr->s6_addr16[1] == 0) &&
 239                 (addr->s6_addr32[1] == 0) &&
 240                 (addr->s6_addr32[2] == 0) &&
 241                 (addr->s6_addr16[6] == 0) &&
 242                 (addr->s6_addr[15] == 2))
 243         {
 244                 buf[0]=0xC0;
 245                 buf[1]=0x00;
 246                 buf[2]=0x02;
 247                 buf[3]=0x00;
 248                 buf[4]=0x00;
 249                 buf[5]=0x00;
 250         } else {
 251                 unsigned char i ;
 252
 253                 i = addr->s6_addr[15] & 7 ;
 254                 buf[0]=0xC0;
 255                 buf[1]=0x00;
 256                 buf[2]=0x00;
 257                 buf[3]=0x01 << i ;
 258                 buf[4]=0x00;
 259                 buf[5]=0x00;
 260         }
 261 }
 262
 263 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
 264 {
 265         buf[0] = 0x00;
 266 }
 267 #endif
 268 #endif