include/net/if_inet6.h

   1 /*
   2  *      inet6 interface/address list definitions
   3  *      Linux INET6 implementation
   4  *
   5  *      Authors:
   6  *      Pedro Roque             <pedro_m@yahoo.com>
   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 <linux/ipv6.h>
  19
  20 #define IF_RA_OTHERCONF 0x80
  21 #define IF_RA_MANAGED   0x40
  22 #define IF_RA_RCVD      0x20
  23 #define IF_RS_SENT      0x10
  24
  25 #ifdef __KERNEL__
  26
  27 struct inet6_ifaddr
  28 {
  29         struct in6_addr         addr;
  30         __u32                   prefix_len;
  31
  32         __u32                   valid_lft;
  33         __u32                   prefered_lft;
  34         unsigned long           tstamp;
  35         atomic_t                refcnt;
  36         spinlock_t              lock;
  37
  38         __u8                    probes;
  39         __u8                    flags;
  40
  41         __u16                   scope;
  42
  43         struct timer_list       timer;
  44
  45         struct inet6_dev        *idev;
  46
  47         struct inet6_ifaddr     *lst_next;      /* next addr in addr_lst */
  48         struct inet6_ifaddr     *if_next;       /* next addr in inet6_dev */
  49
  50         int                     dead;
  51 };
  52
  53 struct ip6_sf_socklist
  54 {
  55         unsigned int            sl_max;
  56         unsigned int            sl_count;
  57         struct in6_addr         sl_addr[0];
  58 };
  59
  60 #define IP6_SFLSIZE(count)      (sizeof(struct ip6_sf_socklist) + \
  61         (count) * sizeof(struct in6_addr))
  62
  63 #define IP6_SFBLOCK     10      /* allocate this many at once */
  64
  65 struct ipv6_mc_socklist
  66 {
  67         struct in6_addr         addr;
  68         int                     ifindex;
  69         struct ipv6_mc_socklist *next;
  70         unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
  71         struct ip6_sf_socklist  *sflist;
  72 };
  73
  74 struct ip6_sf_list
  75 {
  76         struct ip6_sf_list      *sf_next;
  77         struct in6_addr         sf_addr;
  78         unsigned long           sf_count[2];    /* include/exclude counts */
  79         unsigned char           sf_gsresp;      /* include in g & s response? */
  80         unsigned char           sf_oldin;       /* change state */
  81         unsigned char           sf_crcount;     /* retrans. left to send */
  82 };
  83
  84 #define MAF_TIMER_RUNNING       0x01
  85 #define MAF_LAST_REPORTER       0x02
  86 #define MAF_LOADED              0x04
  87 #define MAF_NOREPORT            0x08
  88 #define MAF_GSQUERY             0x10
  89
  90 struct ifmcaddr6
  91 {
  92         struct in6_addr         mca_addr;
  93         struct inet6_dev        *idev;
  94         struct ifmcaddr6        *next;
  95         struct ip6_sf_list      *mca_sources;
  96         struct ip6_sf_list      *mca_tomb;
  97         unsigned int            mca_sfmode;
  98         unsigned long           mca_sfcount[2];
  99         struct timer_list       mca_timer;
 100         unsigned                mca_flags;
 101         int                     mca_users;
 102         atomic_t                mca_refcnt;
 103         spinlock_t              mca_lock;
 104         unsigned char           mca_crcount;
 105 };
 106
 107 /* Anycast stuff */
 108
 109 struct ipv6_ac_socklist
 110 {
 111         struct in6_addr         acl_addr;
 112         int                     acl_ifindex;
 113         struct ipv6_ac_socklist *acl_next;
 114 };
 115
 116 struct ifacaddr6
 117 {
 118         struct in6_addr         aca_addr;
 119         struct inet6_dev        *aca_idev;
 120         struct ifacaddr6        *aca_next;
 121         int                     aca_users;
 122         atomic_t                aca_refcnt;
 123         spinlock_t              aca_lock;
 124 };
 125
 126 #define IFA_HOST        IPV6_ADDR_LOOPBACK
 127 #define IFA_LINK        IPV6_ADDR_LINKLOCAL
 128 #define IFA_SITE        IPV6_ADDR_SITELOCAL
 129 #define IFA_GLOBAL      0x0000U
 130
 131 struct inet6_dev
 132 {
 133         struct net_device               *dev;
 134
 135         struct inet6_ifaddr     *addr_list;
 136
 137         struct ifmcaddr6        *mc_list;
 138         struct ifmcaddr6        *mc_tomb;
 139         rwlock_t                mc_lock;
 140         unsigned long           mc_v1_seen;
 141         unsigned long           mc_maxdelay;
 142         unsigned char           mc_qrv;
 143         unsigned char           mc_gq_running;
 144         unsigned char           mc_ifc_count;
 145         struct timer_list       mc_gq_timer;    /* general query timer */
 146         struct timer_list       mc_ifc_timer;   /* interface change timer */
 147
 148         struct ifacaddr6        *ac_list;
 149         rwlock_t                lock;
 150         atomic_t                refcnt;
 151         __u32                   if_flags;
 152         int                     dead;
 153
 154         struct neigh_parms      *nd_parms;
 155         struct inet6_dev        *next;
 156         struct ipv6_devconf     cnf;
 157 };
 158
 159 extern struct ipv6_devconf ipv6_devconf;
 160
 161 static inline void ipv6_eth_mc_map(struct in6_addr *addr, char *buf)
 162 {
 163         /*
 164          *      +-------+-------+-------+-------+-------+-------+
 165          *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
 166          *      +-------+-------+-------+-------+-------+-------+
 167          */
 168
 169         buf[0]= 0x33;
 170         buf[1]= 0x33;
 171
 172         memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
 173 }
 174
 175 static inline void ipv6_tr_mc_map(struct in6_addr *addr, char *buf)
 176 {
 177         /* All nodes FF01::1, FF02::1, FF02::1:FFxx:xxxx */
 178
 179         if (((addr->s6_addr[0] == 0xFF) &&
 180             ((addr->s6_addr[1] == 0x01) || (addr->s6_addr[1] == 0x02)) &&
 181              (addr->s6_addr16[1] == 0) &&
 182              (addr->s6_addr32[1] == 0) &&
 183              (addr->s6_addr32[2] == 0) &&
 184              (addr->s6_addr16[6] == 0) &&
 185              (addr->s6_addr[15] == 1)) ||
 186             ((addr->s6_addr[0] == 0xFF) &&
 187              (addr->s6_addr[1] == 0x02) &&
 188              (addr->s6_addr16[1] == 0) &&
 189              (addr->s6_addr32[1] == 0) &&
 190              (addr->s6_addr16[4] == 0) &&
 191              (addr->s6_addr[10] == 0) &&
 192              (addr->s6_addr[11] == 1) &&
 193              (addr->s6_addr[12] == 0xff)))
 194         {
 195                 buf[0]=0xC0;
 196                 buf[1]=0x00;
 197                 buf[2]=0x01;
 198                 buf[3]=0x00;
 199                 buf[4]=0x00;
 200                 buf[5]=0x00;
 201         /* All routers FF0x::2 */
 202         } else if ((addr->s6_addr[0] ==0xff) &&
 203                 ((addr->s6_addr[1] & 0xF0) == 0) &&
 204                 (addr->s6_addr16[1] == 0) &&
 205                 (addr->s6_addr32[1] == 0) &&
 206                 (addr->s6_addr32[2] == 0) &&
 207                 (addr->s6_addr16[6] == 0) &&
 208                 (addr->s6_addr[15] == 2))
 209         {
 210                 buf[0]=0xC0;
 211                 buf[1]=0x00;
 212                 buf[2]=0x02;
 213                 buf[3]=0x00;
 214                 buf[4]=0x00;
 215                 buf[5]=0x00;
 216         } else {
 217                 unsigned char i ;
 218
 219                 i = addr->s6_addr[15] & 7 ;
 220                 buf[0]=0xC0;
 221                 buf[1]=0x00;
 222                 buf[2]=0x00;
 223                 buf[3]=0x01 << i ;
 224                 buf[4]=0x00;
 225                 buf[5]=0x00;
 226         }
 227 }
 228
 229 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
 230 {
 231         buf[0] = 0x00;
 232 }
 233 #endif
 234 #endif