include/net/if_inet6.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *      inet6 interface/address list definitions
   4  *      Linux INET6 implementation
   5  *
   6  *      Authors:
   7  *      Pedro Roque             <roque@di.fc.ul.pt>
   8  */
   9
  10 #ifndef _NET_IF_INET6_H
  11 #define _NET_IF_INET6_H
  12
  13 #include <net/snmp.h>
  14 #include <linux/ipv6.h>
  15 #include <linux/refcount.h>
  16
  17 /* inet6_dev.if_flags */
  18
  19 #define IF_RA_OTHERCONF 0x80
  20 #define IF_RA_MANAGED   0x40
  21 #define IF_RA_RCVD      0x20
  22 #define IF_RS_SENT      0x10
  23 #define IF_READY        0x80000000
  24
  25 /* prefix flags */
  26 #define IF_PREFIX_ONLINK        0x01
  27 #define IF_PREFIX_AUTOCONF      0x02
  28
  29 enum {
  30         INET6_IFADDR_STATE_PREDAD,
  31         INET6_IFADDR_STATE_DAD,
  32         INET6_IFADDR_STATE_POSTDAD,
  33         INET6_IFADDR_STATE_ERRDAD,
  34         INET6_IFADDR_STATE_DEAD,
  35 };
  36
  37 struct inet6_ifaddr {
  38         struct in6_addr         addr;
  39         __u32                   prefix_len;
  40         __u32                   rt_priority;
  41
  42         /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
  43         __u32                   valid_lft;
  44         __u32                   prefered_lft;
  45         refcount_t              refcnt;
  46         spinlock_t              lock;
  47
  48         int                     state;
  49
  50         __u32                   flags;
  51         __u8                    dad_probes;
  52         __u8                    stable_privacy_retry;
  53
  54         __u16                   scope;
  55         __u64                   dad_nonce;
  56
  57         unsigned long           cstamp; /* created timestamp */
  58         unsigned long           tstamp; /* updated timestamp */
  59
  60         struct delayed_work     dad_work;
  61
  62         struct inet6_dev        *idev;
  63         struct fib6_info        *rt;
  64
  65         struct hlist_node       addr_lst;
  66         struct list_head        if_list;
  67
  68         struct list_head        tmp_list;
  69         struct inet6_ifaddr     *ifpub;
  70         int                     regen_count;
  71
  72         bool                    tokenized;
  73
  74         struct rcu_head         rcu;
  75         struct in6_addr         peer_addr;
  76 };
  77
  78 struct ip6_sf_socklist {
  79         unsigned int            sl_max;
  80         unsigned int            sl_count;
  81         struct rcu_head         rcu;
  82         struct in6_addr         sl_addr[];
  83 };
  84
  85 #define IP6_SFBLOCK     10      /* allocate this many at once */
  86
  87 struct ipv6_mc_socklist {
  88         struct in6_addr         addr;
  89         int                     ifindex;
  90         unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
  91         struct ipv6_mc_socklist __rcu *next;
  92         struct ip6_sf_socklist  __rcu *sflist;
  93         struct rcu_head         rcu;
  94 };
  95
  96 struct ip6_sf_list {
  97         struct ip6_sf_list __rcu *sf_next;
  98         struct in6_addr         sf_addr;
  99         unsigned long           sf_count[2];    /* include/exclude counts */
 100         unsigned char           sf_gsresp;      /* include in g & s response? */
 101         unsigned char           sf_oldin;       /* change state */
 102         unsigned char           sf_crcount;     /* retrans. left to send */
 103         struct rcu_head         rcu;
 104 };
 105
 106 #define MAF_TIMER_RUNNING       0x01
 107 #define MAF_LAST_REPORTER       0x02
 108 #define MAF_LOADED              0x04
 109 #define MAF_NOREPORT            0x08
 110 #define MAF_GSQUERY             0x10
 111
 112 struct ifmcaddr6 {
 113         struct in6_addr         mca_addr;
 114         struct inet6_dev        *idev;
 115         struct ifmcaddr6        __rcu *next;
 116         struct ip6_sf_list      __rcu *mca_sources;
 117         struct ip6_sf_list      __rcu *mca_tomb;
 118         unsigned int            mca_sfmode;
 119         unsigned char           mca_crcount;
 120         unsigned long           mca_sfcount[2];
 121         struct delayed_work     mca_work;
 122         unsigned int            mca_flags;
 123         int                     mca_users;
 124         refcount_t              mca_refcnt;
 125         unsigned long           mca_cstamp;
 126         unsigned long           mca_tstamp;
 127         struct rcu_head         rcu;
 128 };
 129
 130 /* Anycast stuff */
 131
 132 struct ipv6_ac_socklist {
 133         struct in6_addr         acl_addr;
 134         int                     acl_ifindex;
 135         struct ipv6_ac_socklist *acl_next;
 136 };
 137
 138 struct ifacaddr6 {
 139         struct in6_addr         aca_addr;
 140         struct fib6_info        *aca_rt;
 141         struct ifacaddr6        *aca_next;
 142         struct hlist_node       aca_addr_lst;
 143         int                     aca_users;
 144         refcount_t              aca_refcnt;
 145         unsigned long           aca_cstamp;
 146         unsigned long           aca_tstamp;
 147         struct rcu_head         rcu;
 148 };
 149
 150 #define IFA_HOST        IPV6_ADDR_LOOPBACK
 151 #define IFA_LINK        IPV6_ADDR_LINKLOCAL
 152 #define IFA_SITE        IPV6_ADDR_SITELOCAL
 153
 154 struct ipv6_devstat {
 155         struct proc_dir_entry   *proc_dir_entry;
 156         DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
 157         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
 158         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
 159 };
 160
 161 struct inet6_dev {
 162         struct net_device       *dev;
 163
 164         struct list_head        addr_list;
 165
 166         struct ifmcaddr6        __rcu *mc_list;
 167         struct ifmcaddr6        __rcu *mc_tomb;
 168
 169         unsigned char           mc_qrv;         /* Query Robustness Variable */
 170         unsigned char           mc_gq_running;
 171         unsigned char           mc_ifc_count;
 172         unsigned char           mc_dad_count;
 173
 174         unsigned long           mc_v1_seen;     /* Max time we stay in MLDv1 mode */
 175         unsigned long           mc_qi;          /* Query Interval */
 176         unsigned long           mc_qri;         /* Query Response Interval */
 177         unsigned long           mc_maxdelay;
 178
 179         struct delayed_work     mc_gq_work;     /* general query work */
 180         struct delayed_work     mc_ifc_work;    /* interface change work */
 181         struct delayed_work     mc_dad_work;    /* dad complete mc work */
 182         struct delayed_work     mc_query_work;  /* mld query work */
 183         struct delayed_work     mc_report_work; /* mld report work */
 184
 185         struct sk_buff_head     mc_query_queue;         /* mld query queue */
 186         struct sk_buff_head     mc_report_queue;        /* mld report queue */
 187
 188         spinlock_t              mc_query_lock;  /* mld query queue lock */
 189         spinlock_t              mc_report_lock; /* mld query report lock */
 190         struct mutex            mc_lock;        /* mld global lock */
 191
 192         struct ifacaddr6        *ac_list;
 193         rwlock_t                lock;
 194         refcount_t              refcnt;
 195         __u32                   if_flags;
 196         int                     dead;
 197
 198         u32                     desync_factor;
 199         struct list_head        tempaddr_list;
 200
 201         struct in6_addr         token;
 202
 203         struct neigh_parms      *nd_parms;
 204         struct ipv6_devconf     cnf;
 205         struct ipv6_devstat     stats;
 206
 207         struct timer_list       rs_timer;
 208         __s32                   rs_interval;    /* in jiffies */
 209         __u8                    rs_probes;
 210
 211         unsigned long           tstamp; /* ipv6InterfaceTable update timestamp */
 212         struct rcu_head         rcu;
 213
 214         unsigned int            ra_mtu;
 215 };
 216
 217 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
 218 {
 219         /*
 220          *      +-------+-------+-------+-------+-------+-------+
 221          *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
 222          *      +-------+-------+-------+-------+-------+-------+
 223          */
 224
 225         buf[0]= 0x33;
 226         buf[1]= 0x33;
 227
 228         memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
 229 }
 230
 231 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
 232 {
 233         buf[0] = 0x00;
 234 }
 235
 236 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
 237                                   const unsigned char *broadcast, char *buf)
 238 {
 239         unsigned char scope = broadcast[5] & 0xF;
 240
 241         buf[0]  = 0;            /* Reserved */
 242         buf[1]  = 0xff;         /* Multicast QPN */
 243         buf[2]  = 0xff;
 244         buf[3]  = 0xff;
 245         buf[4]  = 0xff;
 246         buf[5]  = 0x10 | scope; /* scope from broadcast address */
 247         buf[6]  = 0x60;         /* IPv6 signature */
 248         buf[7]  = 0x1b;
 249         buf[8]  = broadcast[8]; /* P_Key */
 250         buf[9]  = broadcast[9];
 251         memcpy(buf + 10, addr->s6_addr + 6, 10);
 252 }
 253
 254 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
 255                                     const unsigned char *broadcast, char *buf)
 256 {
 257         if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
 258                 memcpy(buf, broadcast, 4);
 259         } else {
 260                 /* v4mapped? */
 261                 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
 262                      (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
 263                         return -EINVAL;
 264                 memcpy(buf, &addr->s6_addr32[3], 4);
 265         }
 266         return 0;
 267 }
 268
 269 #endif