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         struct rt6_info         *rt;
  55
  56         struct inet6_ifaddr     *lst_next;      /* next addr in addr_lst */
  57         struct inet6_ifaddr     *if_next;       /* next addr in inet6_dev */
  58
  59 #ifdef CONFIG_IPV6_PRIVACY
  60         struct inet6_ifaddr     *tmp_next;      /* next addr in tempaddr_lst */
  61         struct inet6_ifaddr     *ifpub;
  62         int                     regen_count;
  63 #endif
  64
  65         int                     dead;
  66 };
  67
  68 struct ip6_sf_socklist
  69 {
  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 {
  82         struct in6_addr         addr;
  83         int                     ifindex;
  84         struct ipv6_mc_socklist *next;
  85         unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
  86         struct ip6_sf_socklist  *sflist;
  87 };
  88
  89 struct ip6_sf_list
  90 {
  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 {
 107         struct in6_addr         mca_addr;
 108         struct inet6_dev        *idev;
 109         struct ifmcaddr6        *next;
 110         struct ip6_sf_list      *mca_sources;
 111         struct ip6_sf_list      *mca_tomb;
 112         unsigned int            mca_sfmode;
 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 char           mca_crcount;
 120         unsigned long           mca_cstamp;
 121         unsigned long           mca_tstamp;
 122 };
 123
 124 /* Anycast stuff */
 125
 126 struct ipv6_ac_socklist
 127 {
 128         struct in6_addr         acl_addr;
 129         int                     acl_ifindex;
 130         struct ipv6_ac_socklist *acl_next;
 131 };
 132
 133 struct ifacaddr6
 134 {
 135         struct in6_addr         aca_addr;
 136         struct inet6_dev        *aca_idev;
 137         struct rt6_info         *aca_rt;
 138         struct ifacaddr6        *aca_next;
 139         int                     aca_users;
 140         atomic_t                aca_refcnt;
 141         spinlock_t              aca_lock;
 142         unsigned long           aca_cstamp;
 143         unsigned long           aca_tstamp;
 144 };
 145
 146 #define IFA_HOST        IPV6_ADDR_LOOPBACK
 147 #define IFA_LINK        IPV6_ADDR_LINKLOCAL
 148 #define IFA_SITE        IPV6_ADDR_SITELOCAL
 149 #define IFA_GLOBAL      0x0000U
 150
 151 struct ipv6_devstat {
 152         struct proc_dir_entry   *proc_dir_entry;
 153         DEFINE_SNMP_STAT(struct icmpv6_mib, icmpv6);
 154 };
 155
 156 struct inet6_dev
 157 {
 158         struct net_device               *dev;
 159
 160         struct inet6_ifaddr     *addr_list;
 161
 162         struct ifmcaddr6        *mc_list;
 163         struct ifmcaddr6        *mc_tomb;
 164         rwlock_t                mc_lock;
 165         unsigned long           mc_v1_seen;
 166         unsigned long           mc_maxdelay;
 167         unsigned char           mc_qrv;
 168         unsigned char           mc_gq_running;
 169         unsigned char           mc_ifc_count;
 170         struct timer_list       mc_gq_timer;    /* general query timer */
 171         struct timer_list       mc_ifc_timer;   /* interface change timer */
 172
 173         struct ifacaddr6        *ac_list;
 174         rwlock_t                lock;
 175         atomic_t                refcnt;
 176         __u32                   if_flags;
 177         int                     dead;
 178
 179 #ifdef CONFIG_IPV6_PRIVACY
 180         u8                      rndid[8];
 181         u8                      entropy[8];
 182         struct timer_list       regen_timer;
 183         struct inet6_ifaddr     *tempaddr_list;
 184         __u8                    work_eui64[8];
 185         __u8                    work_digest[16];
 186 #endif
 187
 188         struct neigh_parms      *nd_parms;
 189         struct inet6_dev        *next;
 190         struct ipv6_devconf     cnf;
 191         struct ipv6_devstat     stats;
 192         unsigned long           tstamp; /* ipv6InterfaceTable update timestamp */
 193 };
 194
 195 extern struct ipv6_devconf ipv6_devconf;
 196
 197 static inline void ipv6_eth_mc_map(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(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(struct in6_addr *addr, char *buf)
 271 {
 272         buf[0]  = 0;            /* Reserved */
 273         buf[1]  = 0xff;         /* Multicast QPN */
 274         buf[2]  = 0xff;
 275         buf[3]  = 0xff;
 276         buf[4]  = 0xff;
 277         buf[5]  = 0x12;         /* link local scope */
 278         buf[6]  = 0x60;         /* IPv6 signature */
 279         buf[7]  = 0x1b;
 280         buf[8]  = 0;            /* P_Key */
 281         buf[9]  = 0;
 282         memcpy(buf + 10, addr->s6_addr + 6, 10);
 283 }
 284 #endif
 285 #endif