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_PREDAD,
  35         INET6_IFADDR_STATE_DAD,
  36         INET6_IFADDR_STATE_POSTDAD,
  37         INET6_IFADDR_STATE_ERRDAD,
  38         INET6_IFADDR_STATE_DEAD,
  39 };
  40
  41 struct inet6_ifaddr {
  42         struct in6_addr         addr;
  43         __u32                   prefix_len;
  44
  45         /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
  46         __u32                   valid_lft;
  47         __u32                   prefered_lft;
  48         atomic_t                refcnt;
  49         spinlock_t              lock;
  50
  51         int                     state;
  52
  53         __u32                   flags;
  54         __u8                    dad_probes;
  55         __u8                    stable_privacy_retry;
  56
  57         __u16                   scope;
  58         __u64                   dad_nonce;
  59
  60         unsigned long           cstamp; /* created timestamp */
  61         unsigned long           tstamp; /* updated timestamp */
  62
  63         struct delayed_work     dad_work;
  64
  65         struct inet6_dev        *idev;
  66         struct rt6_info         *rt;
  67
  68         struct hlist_node       addr_lst;
  69         struct list_head        if_list;
  70
  71         struct list_head        tmp_list;
  72         struct inet6_ifaddr     *ifpub;
  73         int                     regen_count;
  74
  75         bool                    tokenized;
  76
  77         struct rcu_head         rcu;
  78         struct in6_addr         peer_addr;
  79 };
  80
  81 struct ip6_sf_socklist {
  82         unsigned int            sl_max;
  83         unsigned int            sl_count;
  84         struct in6_addr         sl_addr[0];
  85 };
  86
  87 #define IP6_SFLSIZE(count)      (sizeof(struct ip6_sf_socklist) + \
  88         (count) * sizeof(struct in6_addr))
  89
  90 #define IP6_SFBLOCK     10      /* allocate this many at once */
  91
  92 struct ipv6_mc_socklist {
  93         struct in6_addr         addr;
  94         int                     ifindex;
  95         struct ipv6_mc_socklist __rcu *next;
  96         rwlock_t                sflock;
  97         unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
  98         struct ip6_sf_socklist  *sflist;
  99         struct rcu_head         rcu;
 100 };
 101
 102 struct ip6_sf_list {
 103         struct ip6_sf_list      *sf_next;
 104         struct in6_addr         sf_addr;
 105         unsigned long           sf_count[2];    /* include/exclude counts */
 106         unsigned char           sf_gsresp;      /* include in g & s response? */
 107         unsigned char           sf_oldin;       /* change state */
 108         unsigned char           sf_crcount;     /* retrans. left to send */
 109 };
 110
 111 #define MAF_TIMER_RUNNING       0x01
 112 #define MAF_LAST_REPORTER       0x02
 113 #define MAF_LOADED              0x04
 114 #define MAF_NOREPORT            0x08
 115 #define MAF_GSQUERY             0x10
 116
 117 struct ifmcaddr6 {
 118         struct in6_addr         mca_addr;
 119         struct inet6_dev        *idev;
 120         struct ifmcaddr6        *next;
 121         struct ip6_sf_list      *mca_sources;
 122         struct ip6_sf_list      *mca_tomb;
 123         unsigned int            mca_sfmode;
 124         unsigned char           mca_crcount;
 125         unsigned long           mca_sfcount[2];
 126         struct timer_list       mca_timer;
 127         unsigned int            mca_flags;
 128         int                     mca_users;
 129         atomic_t                mca_refcnt;
 130         spinlock_t              mca_lock;
 131         unsigned long           mca_cstamp;
 132         unsigned long           mca_tstamp;
 133 };
 134
 135 /* Anycast stuff */
 136
 137 struct ipv6_ac_socklist {
 138         struct in6_addr         acl_addr;
 139         int                     acl_ifindex;
 140         struct ipv6_ac_socklist *acl_next;
 141 };
 142
 143 struct ifacaddr6 {
 144         struct in6_addr         aca_addr;
 145         struct inet6_dev        *aca_idev;
 146         struct rt6_info         *aca_rt;
 147         struct ifacaddr6        *aca_next;
 148         int                     aca_users;
 149         atomic_t                aca_refcnt;
 150         unsigned long           aca_cstamp;
 151         unsigned long           aca_tstamp;
 152 };
 153
 154 #define IFA_HOST        IPV6_ADDR_LOOPBACK
 155 #define IFA_LINK        IPV6_ADDR_LINKLOCAL
 156 #define IFA_SITE        IPV6_ADDR_SITELOCAL
 157
 158 struct ipv6_devstat {
 159         struct proc_dir_entry   *proc_dir_entry;
 160         DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
 161         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
 162         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
 163 };
 164
 165 struct inet6_dev {
 166         struct net_device       *dev;
 167
 168         struct list_head        addr_list;
 169
 170         struct ifmcaddr6        *mc_list;
 171         struct ifmcaddr6        *mc_tomb;
 172         spinlock_t              mc_lock;
 173
 174         unsigned char           mc_qrv;         /* Query Robustness Variable */
 175         unsigned char           mc_gq_running;
 176         unsigned char           mc_ifc_count;
 177         unsigned char           mc_dad_count;
 178
 179         unsigned long           mc_v1_seen;     /* Max time we stay in MLDv1 mode */
 180         unsigned long           mc_qi;          /* Query Interval */
 181         unsigned long           mc_qri;         /* Query Response Interval */
 182         unsigned long           mc_maxdelay;
 183
 184         struct timer_list       mc_gq_timer;    /* general query timer */
 185         struct timer_list       mc_ifc_timer;   /* interface change timer */
 186         struct timer_list       mc_dad_timer;   /* dad complete mc timer */
 187
 188         struct ifacaddr6        *ac_list;
 189         rwlock_t                lock;
 190         atomic_t                refcnt;
 191         __u32                   if_flags;
 192         int                     dead;
 193
 194         u32                     desync_factor;
 195         u8                      rndid[8];
 196         struct list_head        tempaddr_list;
 197
 198         struct in6_addr         token;
 199
 200         struct neigh_parms      *nd_parms;
 201         struct ipv6_devconf     cnf;
 202         struct ipv6_devstat     stats;
 203
 204         struct timer_list       rs_timer;
 205         __s32                   rs_interval;    /* in jiffies */
 206         __u8                    rs_probes;
 207
 208         __u8                    addr_gen_mode;
 209         unsigned long           tstamp; /* ipv6InterfaceTable update timestamp */
 210         struct rcu_head         rcu;
 211 };
 212
 213 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
 214 {
 215         /*
 216          *      +-------+-------+-------+-------+-------+-------+
 217          *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
 218          *      +-------+-------+-------+-------+-------+-------+
 219          */
 220
 221         buf[0]= 0x33;
 222         buf[1]= 0x33;
 223
 224         memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
 225 }
 226
 227 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
 228 {
 229         buf[0] = 0x00;
 230 }
 231
 232 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
 233                                   const unsigned char *broadcast, char *buf)
 234 {
 235         unsigned char scope = broadcast[5] & 0xF;
 236
 237         buf[0]  = 0;            /* Reserved */
 238         buf[1]  = 0xff;         /* Multicast QPN */
 239         buf[2]  = 0xff;
 240         buf[3]  = 0xff;
 241         buf[4]  = 0xff;
 242         buf[5]  = 0x10 | scope; /* scope from broadcast address */
 243         buf[6]  = 0x60;         /* IPv6 signature */
 244         buf[7]  = 0x1b;
 245         buf[8]  = broadcast[8]; /* P_Key */
 246         buf[9]  = broadcast[9];
 247         memcpy(buf + 10, addr->s6_addr + 6, 10);
 248 }
 249
 250 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
 251                                     const unsigned char *broadcast, char *buf)
 252 {
 253         if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
 254                 memcpy(buf, broadcast, 4);
 255         } else {
 256                 /* v4mapped? */
 257                 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
 258                      (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
 259                         return -EINVAL;
 260                 memcpy(buf, &addr->s6_addr32[3], 4);
 261         }
 262         return 0;
 263 }
 264
 265 #endif