linux/include/net/if_inet6.h
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   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
  33enum {
  34        INET6_IFADDR_STATE_DAD,
  35        INET6_IFADDR_STATE_POSTDAD,
  36        INET6_IFADDR_STATE_UP,
  37        INET6_IFADDR_STATE_DEAD,
  38};
  39
  40struct 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
  77struct 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
  88struct 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
  98struct 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
 113struct 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 int            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
 133struct ipv6_ac_socklist {
 134        struct in6_addr         acl_addr;
 135        int                     acl_ifindex;
 136        struct ipv6_ac_socklist *acl_next;
 137};
 138
 139struct 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
 155struct 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
 162struct 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
 198static 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
 212static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
 213{
 214        buf[0] = 0x00;
 215}
 216
 217static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
 218                                  const unsigned char *broadcast, char *buf)
 219{
 220        unsigned char scope = broadcast[5] & 0xF;
 221
 222        buf[0]  = 0;            /* Reserved */
 223        buf[1]  = 0xff;         /* Multicast QPN */
 224        buf[2]  = 0xff;
 225        buf[3]  = 0xff;
 226        buf[4]  = 0xff;
 227        buf[5]  = 0x10 | scope; /* scope from broadcast address */
 228        buf[6]  = 0x60;         /* IPv6 signature */
 229        buf[7]  = 0x1b;
 230        buf[8]  = broadcast[8]; /* P_Key */
 231        buf[9]  = broadcast[9];
 232        memcpy(buf + 10, addr->s6_addr + 6, 10);
 233}
 234
 235static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
 236                                    const unsigned char *broadcast, char *buf)
 237{
 238        if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
 239                memcpy(buf, broadcast, 4);
 240        } else {
 241                /* v4mapped? */
 242                if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
 243                     (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
 244                        return -EINVAL;
 245                memcpy(buf, &addr->s6_addr32[3], 4);
 246        }
 247        return 0;
 248}
 249
 250#endif
 251
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