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 #define IF_READY        0x80000000
  28
  29 /* prefix flags */
  30 #define IF_PREFIX_ONLINK        0x01
  31 #define IF_PREFIX_AUTOCONF      0x02
  32
  33 enum {
  34         INET6_IFADDR_STATE_DAD,
  35         INET6_IFADDR_STATE_POSTDAD,
  36         INET6_IFADDR_STATE_UP,
  37         INET6_IFADDR_STATE_DEAD,
  38 };
  39
  40 struct inet6_ifaddr {
  41         struct in6_addr         addr;
  42         __u32                   prefix_len;
  43
  44         /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
  45         __u32                   valid_lft;
  46         __u32                   prefered_lft;
  47         atomic_t                refcnt;
  48         spinlock_t              lock;
  49         spinlock_t              state_lock;
  50
  51         int                     state;
  52
  53         __u8                    probes;
  54         __u8                    flags;
  55
  56         __u16                   scope;
  57
  58         unsigned long           cstamp; /* created timestamp */
  59         unsigned long           tstamp; /* updated timestamp */
  60
  61         struct timer_list       timer;
  62
  63         struct inet6_dev        *idev;
  64         struct rt6_info         *rt;
  65
  66         struct hlist_node       addr_lst;
  67         struct list_head        if_list;
  68
  69 #ifdef CONFIG_IPV6_PRIVACY
  70         struct list_head        tmp_list;
  71         struct inet6_ifaddr     *ifpub;
  72         int                     regen_count;
  73 #endif
  74         struct rcu_head         rcu;
  75 };
  76
  77 struct ip6_sf_socklist {
  78         unsigned int            sl_max;
  79         unsigned int            sl_count;
  80         struct in6_addr         sl_addr[0];
  81 };
  82
  83 #define IP6_SFLSIZE(count)      (sizeof(struct ip6_sf_socklist) + \
  84         (count) * sizeof(struct in6_addr))
  85
  86 #define IP6_SFBLOCK     10      /* allocate this many at once */
  87
  88 struct ipv6_mc_socklist {
  89         struct in6_addr         addr;
  90         int                     ifindex;
  91         struct ipv6_mc_socklist __rcu *next;
  92         rwlock_t                sflock;
  93         unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
  94         struct ip6_sf_socklist  *sflist;
  95         struct rcu_head         rcu;
  96 };
  97
  98 struct ip6_sf_list {
  99         struct ip6_sf_list      *sf_next;
 100         struct in6_addr         sf_addr;
 101         unsigned long           sf_count[2];    /* include/exclude counts */
 102         unsigned char           sf_gsresp;      /* include in g & s response? */
 103         unsigned char           sf_oldin;       /* change state */
 104         unsigned char           sf_crcount;     /* retrans. left to send */
 105 };
 106
 107 #define MAF_TIMER_RUNNING       0x01
 108 #define MAF_LAST_REPORTER       0x02
 109 #define MAF_LOADED              0x04
 110 #define MAF_NOREPORT            0x08
 111 #define MAF_GSQUERY             0x10
 112
 113 struct ifmcaddr6 {
 114         struct in6_addr         mca_addr;
 115         struct inet6_dev        *idev;
 116         struct ifmcaddr6        *next;
 117         struct ip6_sf_list      *mca_sources;
 118         struct ip6_sf_list      *mca_tomb;
 119         unsigned int            mca_sfmode;
 120         unsigned char           mca_crcount;
 121         unsigned long           mca_sfcount[2];
 122         struct timer_list       mca_timer;
 123         unsigned                mca_flags;
 124         int                     mca_users;
 125         atomic_t                mca_refcnt;
 126         spinlock_t              mca_lock;
 127         unsigned long           mca_cstamp;
 128         unsigned long           mca_tstamp;
 129 };
 130
 131 /* Anycast stuff */
 132
 133 struct ipv6_ac_socklist {
 134         struct in6_addr         acl_addr;
 135         int                     acl_ifindex;
 136         struct ipv6_ac_socklist *acl_next;
 137 };
 138
 139 struct ifacaddr6 {
 140         struct in6_addr         aca_addr;
 141         struct inet6_dev        *aca_idev;
 142         struct rt6_info         *aca_rt;
 143         struct ifacaddr6        *aca_next;
 144         int                     aca_users;
 145         atomic_t                aca_refcnt;
 146         spinlock_t              aca_lock;
 147         unsigned long           aca_cstamp;
 148         unsigned long           aca_tstamp;
 149 };
 150
 151 #define IFA_HOST        IPV6_ADDR_LOOPBACK
 152 #define IFA_LINK        IPV6_ADDR_LINKLOCAL
 153 #define IFA_SITE        IPV6_ADDR_SITELOCAL
 154
 155 struct ipv6_devstat {
 156         struct proc_dir_entry   *proc_dir_entry;
 157         DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
 158         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
 159         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
 160 };
 161
 162 struct inet6_dev {
 163         struct net_device       *dev;
 164
 165         struct list_head        addr_list;
 166
 167         struct ifmcaddr6        *mc_list;
 168         struct ifmcaddr6        *mc_tomb;
 169         spinlock_t              mc_lock;
 170         unsigned char           mc_qrv;
 171         unsigned char           mc_gq_running;
 172         unsigned char           mc_ifc_count;
 173         unsigned long           mc_v1_seen;
 174         unsigned long           mc_maxdelay;
 175         struct timer_list       mc_gq_timer;    /* general query timer */
 176         struct timer_list       mc_ifc_timer;   /* interface change timer */
 177
 178         struct ifacaddr6        *ac_list;
 179         rwlock_t                lock;
 180         atomic_t                refcnt;
 181         __u32                   if_flags;
 182         int                     dead;
 183
 184 #ifdef CONFIG_IPV6_PRIVACY
 185         u8                      rndid[8];
 186         struct timer_list       regen_timer;
 187         struct list_head        tempaddr_list;
 188 #endif
 189
 190         struct neigh_parms      *nd_parms;
 191         struct inet6_dev        *next;
 192         struct ipv6_devconf     cnf;
 193         struct ipv6_devstat     stats;
 194         unsigned long           tstamp; /* ipv6InterfaceTable update timestamp */
 195         struct rcu_head         rcu;
 196 };
 197
 198 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
 199 {
 200         /*
 201          *      +-------+-------+-------+-------+-------+-------+
 202          *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
 203          *      +-------+-------+-------+-------+-------+-------+
 204          */
 205
 206         buf[0]= 0x33;
 207         buf[1]= 0x33;
 208
 209         memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
 210 }
 211
 212 static inline void ipv6_tr_mc_map(const struct in6_addr *addr, char *buf)
 213 {
 214         /* All nodes FF01::1, FF02::1, FF02::1:FFxx:xxxx */
 215
 216         if (((addr->s6_addr[0] == 0xFF) &&
 217             ((addr->s6_addr[1] == 0x01) || (addr->s6_addr[1] == 0x02)) &&
 218              (addr->s6_addr16[1] == 0) &&
 219              (addr->s6_addr32[1] == 0) &&
 220              (addr->s6_addr32[2] == 0) &&
 221              (addr->s6_addr16[6] == 0) &&
 222              (addr->s6_addr[15] == 1)) ||
 223             ((addr->s6_addr[0] == 0xFF) &&
 224              (addr->s6_addr[1] == 0x02) &&
 225              (addr->s6_addr16[1] == 0) &&
 226              (addr->s6_addr32[1] == 0) &&
 227              (addr->s6_addr16[4] == 0) &&
 228              (addr->s6_addr[10] == 0) &&
 229              (addr->s6_addr[11] == 1) &&
 230              (addr->s6_addr[12] == 0xff)))
 231         {
 232                 buf[0]=0xC0;
 233                 buf[1]=0x00;
 234                 buf[2]=0x01;
 235                 buf[3]=0x00;
 236                 buf[4]=0x00;
 237                 buf[5]=0x00;
 238         /* All routers FF0x::2 */
 239         } else if ((addr->s6_addr[0] ==0xff) &&
 240                 ((addr->s6_addr[1] & 0xF0) == 0) &&
 241                 (addr->s6_addr16[1] == 0) &&
 242                 (addr->s6_addr32[1] == 0) &&
 243                 (addr->s6_addr32[2] == 0) &&
 244                 (addr->s6_addr16[6] == 0) &&
 245                 (addr->s6_addr[15] == 2))
 246         {
 247                 buf[0]=0xC0;
 248                 buf[1]=0x00;
 249                 buf[2]=0x02;
 250                 buf[3]=0x00;
 251                 buf[4]=0x00;
 252                 buf[5]=0x00;
 253         } else {
 254                 unsigned char i ;
 255
 256                 i = addr->s6_addr[15] & 7 ;
 257                 buf[0]=0xC0;
 258                 buf[1]=0x00;
 259                 buf[2]=0x00;
 260                 buf[3]=0x01 << i ;
 261                 buf[4]=0x00;
 262                 buf[5]=0x00;
 263         }
 264 }
 265
 266 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
 267 {
 268         buf[0] = 0x00;
 269 }
 270
 271 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
 272                                   const unsigned char *broadcast, char *buf)
 273 {
 274         unsigned char scope = broadcast[5] & 0xF;
 275
 276         buf[0]  = 0;            /* Reserved */
 277         buf[1]  = 0xff;         /* Multicast QPN */
 278         buf[2]  = 0xff;
 279         buf[3]  = 0xff;
 280         buf[4]  = 0xff;
 281         buf[5]  = 0x10 | scope; /* scope from broadcast address */
 282         buf[6]  = 0x60;         /* IPv6 signature */
 283         buf[7]  = 0x1b;
 284         buf[8]  = broadcast[8]; /* P_Key */
 285         buf[9]  = broadcast[9];
 286         memcpy(buf + 10, addr->s6_addr + 6, 10);
 287 }
 288
 289 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
 290                                     const unsigned char *broadcast, char *buf)
 291 {
 292         if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
 293                 memcpy(buf, broadcast, 4);
 294         } else {
 295                 /* v4mapped? */
 296                 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
 297                      (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
 298                         return -EINVAL;
 299                 memcpy(buf, &addr->s6_addr32[3], 4);
 300         }
 301         return 0;
 302 }
 303
 304 #endif