include/net1/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 #define IF_RA_RCVD      0x20
  19 #define IF_RS_SENT      0x10
  20
  21 #ifdef __KERNEL__
  22
  23 struct inet6_ifaddr
  24 {
  25         struct in6_addr         addr;
  26         __u32                   prefix_len;
  27
  28         __u32                   valid_lft;
  29         __u32                   prefered_lft;
  30         unsigned long           tstamp;
  31         atomic_t                refcnt;
  32         spinlock_t              lock;
  33
  34         __u8                    probes;
  35         __u8                    flags;
  36
  37         __u16                   scope;
  38
  39         struct timer_list       timer;
  40
  41         struct inet6_dev        *idev;
  42
  43         struct inet6_ifaddr     *lst_next;      /* next addr in addr_lst */
  44         struct inet6_ifaddr     *if_next;       /* next addr in inet6_dev */
  45
  46         int                     dead;
  47 };
  48
  49 struct ipv6_mc_socklist
  50 {
  51         struct in6_addr         addr;
  52         int                     ifindex;
  53         struct ipv6_mc_socklist *next;
  54 };
  55
  56 #define MAF_TIMER_RUNNING       0x01
  57 #define MAF_LAST_REPORTER       0x02
  58 #define MAF_LOADED              0x04
  59
  60 struct ifmcaddr6
  61 {
  62         struct in6_addr         mca_addr;
  63         struct inet6_dev        *idev;
  64         struct ifmcaddr6        *next;
  65         struct timer_list       mca_timer;
  66         unsigned                mca_flags;
  67         int                     mca_users;
  68         atomic_t                mca_refcnt;
  69         spinlock_t              mca_lock;
  70 };
  71
  72 #define IFA_HOST        IPV6_ADDR_LOOPBACK
  73 #define IFA_LINK        IPV6_ADDR_LINKLOCAL
  74 #define IFA_SITE        IPV6_ADDR_SITELOCAL
  75 #define IFA_GLOBAL      0x0000U
  76
  77 struct ipv6_devconf
  78 {
  79         int             forwarding;
  80         int             hop_limit;
  81         int             mtu6;
  82         int             accept_ra;
  83         int             accept_redirects;
  84         int             autoconf;
  85         int             dad_transmits;
  86         int             rtr_solicits;
  87         int             rtr_solicit_interval;
  88         int             rtr_solicit_delay;
  89
  90         void            *sysctl;
  91 };
  92
  93 struct inet6_dev
  94 {
  95         struct net_device               *dev;
  96
  97         struct inet6_ifaddr     *addr_list;
  98         struct ifmcaddr6        *mc_list;
  99         rwlock_t                lock;
 100         atomic_t                refcnt;
 101         __u32                   if_flags;
 102         int                     dead;
 103
 104         struct neigh_parms      *nd_parms;
 105         struct inet6_dev        *next;
 106         struct ipv6_devconf     cnf;
 107 };
 108
 109 extern struct ipv6_devconf ipv6_devconf;
 110
 111 static inline void ipv6_eth_mc_map(struct in6_addr *addr, char *buf)
 112 {
 113         /*
 114          *      +-------+-------+-------+-------+-------+-------+
 115          *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
 116          *      +-------+-------+-------+-------+-------+-------+
 117          */
 118
 119         buf[0]= 0x33;
 120         buf[1]= 0x33;
 121
 122         memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
 123 }
 124
 125 static inline void ipv6_tr_mc_map(struct in6_addr *addr, char *buf)
 126 {
 127         /* All nodes FF01::1, FF02::1, FF02::1:FFxx:xxxx */
 128
 129         if (((addr->s6_addr[0] == 0xFF) &&
 130             ((addr->s6_addr[1] == 0x01) || (addr->s6_addr[1] == 0x02)) &&
 131              (addr->s6_addr16[1] == 0) &&
 132              (addr->s6_addr32[1] == 0) &&
 133              (addr->s6_addr32[2] == 0) &&
 134              (addr->s6_addr16[6] == 0) &&
 135              (addr->s6_addr[15] == 1)) ||
 136             ((addr->s6_addr[0] == 0xFF) &&
 137              (addr->s6_addr[1] == 0x02) &&
 138              (addr->s6_addr16[1] == 0) &&
 139              (addr->s6_addr32[1] == 0) &&
 140              (addr->s6_addr16[4] == 0) &&
 141              (addr->s6_addr[10] == 0) &&
 142              (addr->s6_addr[11] == 1) &&
 143              (addr->s6_addr[12] == 0xff)))
 144         {
 145                 buf[0]=0xC0;
 146                 buf[1]=0x00;
 147                 buf[2]=0x01;
 148                 buf[3]=0x00;
 149                 buf[4]=0x00;
 150                 buf[5]=0x00;
 151         /* All routers FF0x::2 */
 152         } else if ((addr->s6_addr[0] ==0xff) &&
 153                 ((addr->s6_addr[1] & 0xF0) == 0) &&
 154                 (addr->s6_addr16[1] == 0) &&
 155                 (addr->s6_addr32[1] == 0) &&
 156                 (addr->s6_addr32[2] == 0) &&
 157                 (addr->s6_addr16[6] == 0) &&
 158                 (addr->s6_addr[15] == 2))
 159         {
 160                 buf[0]=0xC0;
 161                 buf[1]=0x00;
 162                 buf[2]=0x02;
 163                 buf[3]=0x00;
 164                 buf[4]=0x00;
 165                 buf[5]=0x00;
 166         } else {
 167                 unsigned char i ;
 168
 169                 i = addr->s6_addr[15] & 7 ;
 170                 buf[0]=0xC0;
 171                 buf[1]=0x00;
 172                 buf[2]=0x00;
 173                 buf[3]=0x01 << i ;
 174                 buf[4]=0x00;
 175                 buf[5]=0x00;
 176         }
 177 }
 178 #endif
 179 #endif