include/linux/rtnetlink.h

   1 #ifndef __LINUX_RTNETLINK_H
   2 #define __LINUX_RTNETLINK_H
   3
   4 #include <linux/netlink.h>
   5
   6 /****
   7  *              Routing/neighbour discovery messages.
   8  ****/
   9
  10 /* Types of messages */
  11
  12 enum {
  13         RTM_BASE        = 16,
  14 #define RTM_BASE        RTM_BASE
  15
  16         RTM_NEWLINK     = 16,
  17 #define RTM_NEWLINK     RTM_NEWLINK
  18         RTM_DELLINK,
  19 #define RTM_DELLINK     RTM_DELLINK
  20         RTM_GETLINK,
  21 #define RTM_GETLINK     RTM_GETLINK
  22         RTM_SETLINK,
  23 #define RTM_SETLINK     RTM_SETLINK
  24
  25         RTM_NEWADDR     = 20,
  26 #define RTM_NEWADDR     RTM_NEWADDR
  27         RTM_DELADDR,
  28 #define RTM_DELADDR     RTM_DELADDR
  29         RTM_GETADDR,
  30 #define RTM_GETADDR     RTM_GETADDR
  31
  32         RTM_NEWROUTE    = 24,
  33 #define RTM_NEWROUTE    RTM_NEWROUTE
  34         RTM_DELROUTE,
  35 #define RTM_DELROUTE    RTM_DELROUTE
  36         RTM_GETROUTE,
  37 #define RTM_GETROUTE    RTM_GETROUTE
  38
  39         RTM_NEWNEIGH    = 28,
  40 #define RTM_NEWNEIGH    RTM_NEWNEIGH
  41         RTM_DELNEIGH,
  42 #define RTM_DELNEIGH    RTM_DELNEIGH
  43         RTM_GETNEIGH,
  44 #define RTM_GETNEIGH    RTM_GETNEIGH
  45
  46         RTM_NEWRULE     = 32,
  47 #define RTM_NEWRULE     RTM_NEWRULE
  48         RTM_DELRULE,
  49 #define RTM_DELRULE     RTM_DELRULE
  50         RTM_GETRULE,
  51 #define RTM_GETRULE     RTM_GETRULE
  52
  53         RTM_NEWQDISC    = 36,
  54 #define RTM_NEWQDISC    RTM_NEWQDISC
  55         RTM_DELQDISC,
  56 #define RTM_DELQDISC    RTM_DELQDISC
  57         RTM_GETQDISC,
  58 #define RTM_GETQDISC    RTM_GETQDISC
  59
  60         RTM_NEWTCLASS   = 40,
  61 #define RTM_NEWTCLASS   RTM_NEWTCLASS
  62         RTM_DELTCLASS,
  63 #define RTM_DELTCLASS   RTM_DELTCLASS
  64         RTM_GETTCLASS,
  65 #define RTM_GETTCLASS   RTM_GETTCLASS
  66
  67         RTM_NEWTFILTER  = 44,
  68 #define RTM_NEWTFILTER  RTM_NEWTFILTER
  69         RTM_DELTFILTER,
  70 #define RTM_DELTFILTER  RTM_DELTFILTER
  71         RTM_GETTFILTER,
  72 #define RTM_GETTFILTER  RTM_GETTFILTER
  73
  74         RTM_NEWACTION   = 48,
  75 #define RTM_NEWACTION   RTM_NEWACTION
  76         RTM_DELACTION,
  77 #define RTM_DELACTION   RTM_DELACTION
  78         RTM_GETACTION,
  79 #define RTM_GETACTION   RTM_GETACTION
  80
  81         RTM_NEWPREFIX   = 52,
  82 #define RTM_NEWPREFIX   RTM_NEWPREFIX
  83         RTM_GETPREFIX   = 54,
  84 #define RTM_GETPREFIX   RTM_GETPREFIX
  85
  86         RTM_GETMULTICAST = 58,
  87 #define RTM_GETMULTICAST RTM_GETMULTICAST
  88
  89         RTM_GETANYCAST  = 62,
  90 #define RTM_GETANYCAST  RTM_GETANYCAST
  91
  92         RTM_NEWNEIGHTBL = 64,
  93 #define RTM_NEWNEIGHTBL RTM_NEWNEIGHTBL
  94         RTM_GETNEIGHTBL = 66,
  95 #define RTM_GETNEIGHTBL RTM_GETNEIGHTBL
  96         RTM_SETNEIGHTBL,
  97 #define RTM_SETNEIGHTBL RTM_SETNEIGHTBL
  98
  99         __RTM_MAX,
 100 #define RTM_MAX         (((__RTM_MAX + 3) & ~3) - 1)
 101 };
 102
 103 #define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE)
 104 #define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2)
 105 #define RTM_FAM(cmd)    (((cmd) - RTM_BASE) >> 2)
 106
 107 /*
 108    Generic structure for encapsulation of optional route information.
 109    It is reminiscent of sockaddr, but with sa_family replaced
 110    with attribute type.
 111  */
 112
 113 struct rtattr
 114 {
 115         unsigned short  rta_len;
 116         unsigned short  rta_type;
 117 };
 118
 119 /* Macros to handle rtattributes */
 120
 121 #define RTA_ALIGNTO     4
 122 #define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) )
 123 #define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \
 124                          (rta)->rta_len >= sizeof(struct rtattr) && \
 125                          (rta)->rta_len <= (len))
 126 #define RTA_NEXT(rta,attrlen)   ((attrlen) -= RTA_ALIGN((rta)->rta_len), \
 127                                  (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
 128 #define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len))
 129 #define RTA_SPACE(len)  RTA_ALIGN(RTA_LENGTH(len))
 130 #define RTA_DATA(rta)   ((void*)(((char*)(rta)) + RTA_LENGTH(0)))
 131 #define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0))
 132
 133
 134
 135
 136 /******************************************************************************
 137  *              Definitions used in routing table administration.
 138  ****/
 139
 140 struct rtmsg
 141 {
 142         unsigned char           rtm_family;
 143         unsigned char           rtm_dst_len;
 144         unsigned char           rtm_src_len;
 145         unsigned char           rtm_tos;
 146
 147         unsigned char           rtm_table;      /* Routing table id */
 148         unsigned char           rtm_protocol;   /* Routing protocol; see below  */
 149         unsigned char           rtm_scope;      /* See below */
 150         unsigned char           rtm_type;       /* See below    */
 151
 152         unsigned                rtm_flags;
 153 };
 154
 155 /* rtm_type */
 156
 157 enum
 158 {
 159         RTN_UNSPEC,
 160         RTN_UNICAST,            /* Gateway or direct route      */
 161         RTN_LOCAL,              /* Accept locally               */
 162         RTN_BROADCAST,          /* Accept locally as broadcast,
 163                                    send as broadcast */
 164         RTN_ANYCAST,            /* Accept locally as broadcast,
 165                                    but send as unicast */
 166         RTN_MULTICAST,          /* Multicast route              */
 167         RTN_BLACKHOLE,          /* Drop                         */
 168         RTN_UNREACHABLE,        /* Destination is unreachable   */
 169         RTN_PROHIBIT,           /* Administratively prohibited  */
 170         RTN_THROW,              /* Not in this table            */
 171         RTN_NAT,                /* Translate this address       */
 172         RTN_XRESOLVE,           /* Use external resolver        */
 173         __RTN_MAX
 174 };
 175
 176 #define RTN_MAX (__RTN_MAX - 1)
 177
 178
 179 /* rtm_protocol */
 180
 181 #define RTPROT_UNSPEC   0
 182 #define RTPROT_REDIRECT 1       /* Route installed by ICMP redirects;
 183                                    not used by current IPv4 */
 184 #define RTPROT_KERNEL   2       /* Route installed by kernel            */
 185 #define RTPROT_BOOT     3       /* Route installed during boot          */
 186 #define RTPROT_STATIC   4       /* Route installed by administrator     */
 187
 188 /* Values of protocol >= RTPROT_STATIC are not interpreted by kernel;
 189    they are just passed from user and back as is.
 190    It will be used by hypothetical multiple routing daemons.
 191    Note that protocol values should be standardized in order to
 192    avoid conflicts.
 193  */
 194
 195 #define RTPROT_GATED    8       /* Apparently, GateD */
 196 #define RTPROT_RA       9       /* RDISC/ND router advertisements */
 197 #define RTPROT_MRT      10      /* Merit MRT */
 198 #define RTPROT_ZEBRA    11      /* Zebra */
 199 #define RTPROT_BIRD     12      /* BIRD */
 200 #define RTPROT_DNROUTED 13      /* DECnet routing daemon */
 201 #define RTPROT_XORP     14      /* XORP */
 202 #define RTPROT_NTK      15      /* Netsukuku */
 203
 204 /* rtm_scope
 205
 206    Really it is not scope, but sort of distance to the destination.
 207    NOWHERE are reserved for not existing destinations, HOST is our
 208    local addresses, LINK are destinations, located on directly attached
 209    link and UNIVERSE is everywhere in the Universe.
 210
 211    Intermediate values are also possible f.e. interior routes
 212    could be assigned a value between UNIVERSE and LINK.
 213 */
 214
 215 enum rt_scope_t
 216 {
 217         RT_SCOPE_UNIVERSE=0,
 218 /* User defined values  */
 219         RT_SCOPE_SITE=200,
 220         RT_SCOPE_LINK=253,
 221         RT_SCOPE_HOST=254,
 222         RT_SCOPE_NOWHERE=255
 223 };
 224
 225 /* rtm_flags */
 226
 227 #define RTM_F_NOTIFY            0x100   /* Notify user of route change  */
 228 #define RTM_F_CLONED            0x200   /* This route is cloned         */
 229 #define RTM_F_EQUALIZE          0x400   /* Multipath equalizer: NI      */
 230 #define RTM_F_PREFIX            0x800   /* Prefix addresses             */
 231
 232 /* Reserved table identifiers */
 233
 234 enum rt_class_t
 235 {
 236         RT_TABLE_UNSPEC=0,
 237 /* User defined values */
 238         RT_TABLE_DEFAULT=253,
 239         RT_TABLE_MAIN=254,
 240         RT_TABLE_LOCAL=255,
 241         __RT_TABLE_MAX
 242 };
 243 #define RT_TABLE_MAX (__RT_TABLE_MAX - 1)
 244
 245
 246
 247 /* Routing message attributes */
 248
 249 enum rtattr_type_t
 250 {
 251         RTA_UNSPEC,
 252         RTA_DST,
 253         RTA_SRC,
 254         RTA_IIF,
 255         RTA_OIF,
 256         RTA_GATEWAY,
 257         RTA_PRIORITY,
 258         RTA_PREFSRC,
 259         RTA_METRICS,
 260         RTA_MULTIPATH,
 261         RTA_PROTOINFO,
 262         RTA_FLOW,
 263         RTA_CACHEINFO,
 264         RTA_SESSION,
 265         RTA_MP_ALGO,
 266         __RTA_MAX
 267 };
 268
 269 #define RTA_MAX (__RTA_MAX - 1)
 270
 271 #define RTM_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
 272 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
 273
 274 /* RTM_MULTIPATH --- array of struct rtnexthop.
 275  *
 276  * "struct rtnexthop" describes all necessary nexthop information,
 277  * i.e. parameters of path to a destination via this nexthop.
 278  *
 279  * At the moment it is impossible to set different prefsrc, mtu, window
 280  * and rtt for different paths from multipath.
 281  */
 282
 283 struct rtnexthop
 284 {
 285         unsigned short          rtnh_len;
 286         unsigned char           rtnh_flags;
 287         unsigned char           rtnh_hops;
 288         int                     rtnh_ifindex;
 289 };
 290
 291 /* rtnh_flags */
 292
 293 #define RTNH_F_DEAD             1       /* Nexthop is dead (used by multipath)  */
 294 #define RTNH_F_PERVASIVE        2       /* Do recursive gateway lookup  */
 295 #define RTNH_F_ONLINK           4       /* Gateway is forced on link    */
 296
 297 /* Macros to handle hexthops */
 298
 299 #define RTNH_ALIGNTO    4
 300 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) )
 301 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \
 302                            ((int)(rtnh)->rtnh_len) <= (len))
 303 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len)))
 304 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len))
 305 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len))
 306 #define RTNH_DATA(rtnh)   ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0)))
 307
 308 /* RTM_CACHEINFO */
 309
 310 struct rta_cacheinfo
 311 {
 312         __u32   rta_clntref;
 313         __u32   rta_lastuse;
 314         __s32   rta_expires;
 315         __u32   rta_error;
 316         __u32   rta_used;
 317
 318 #define RTNETLINK_HAVE_PEERINFO 1
 319         __u32   rta_id;
 320         __u32   rta_ts;
 321         __u32   rta_tsage;
 322 };
 323
 324 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
 325
 326 enum
 327 {
 328         RTAX_UNSPEC,
 329 #define RTAX_UNSPEC RTAX_UNSPEC
 330         RTAX_LOCK,
 331 #define RTAX_LOCK RTAX_LOCK
 332         RTAX_MTU,
 333 #define RTAX_MTU RTAX_MTU
 334         RTAX_WINDOW,
 335 #define RTAX_WINDOW RTAX_WINDOW
 336         RTAX_RTT,
 337 #define RTAX_RTT RTAX_RTT
 338         RTAX_RTTVAR,
 339 #define RTAX_RTTVAR RTAX_RTTVAR
 340         RTAX_SSTHRESH,
 341 #define RTAX_SSTHRESH RTAX_SSTHRESH
 342         RTAX_CWND,
 343 #define RTAX_CWND RTAX_CWND
 344         RTAX_ADVMSS,
 345 #define RTAX_ADVMSS RTAX_ADVMSS
 346         RTAX_REORDERING,
 347 #define RTAX_REORDERING RTAX_REORDERING
 348         RTAX_HOPLIMIT,
 349 #define RTAX_HOPLIMIT RTAX_HOPLIMIT
 350         RTAX_INITCWND,
 351 #define RTAX_INITCWND RTAX_INITCWND
 352         RTAX_FEATURES,
 353 #define RTAX_FEATURES RTAX_FEATURES
 354         __RTAX_MAX
 355 };
 356
 357 #define RTAX_MAX (__RTAX_MAX - 1)
 358
 359 #define RTAX_FEATURE_ECN        0x00000001
 360 #define RTAX_FEATURE_SACK       0x00000002
 361 #define RTAX_FEATURE_TIMESTAMP  0x00000004
 362 #define RTAX_FEATURE_ALLFRAG    0x00000008
 363
 364 struct rta_session
 365 {
 366         __u8    proto;
 367         __u8    pad1;
 368         __u16   pad2;
 369
 370         union {
 371                 struct {
 372                         __u16   sport;
 373                         __u16   dport;
 374                 } ports;
 375
 376                 struct {
 377                         __u8    type;
 378                         __u8    code;
 379                         __u16   ident;
 380                 } icmpt;
 381
 382                 __u32           spi;
 383         } u;
 384 };
 385
 386
 387
 388 /**************************************************************
 389  *              Neighbour discovery.
 390  ****/
 391
 392 struct ndmsg
 393 {
 394         unsigned char   ndm_family;
 395         unsigned char   ndm_pad1;
 396         unsigned short  ndm_pad2;
 397         int             ndm_ifindex;    /* Link index                   */
 398         __u16           ndm_state;
 399         __u8            ndm_flags;
 400         __u8            ndm_type;
 401 };
 402
 403 enum
 404 {
 405         NDA_UNSPEC,
 406         NDA_DST,
 407         NDA_LLADDR,
 408         NDA_CACHEINFO,
 409         NDA_PROBES,
 410         __NDA_MAX
 411 };
 412
 413 #define NDA_MAX (__NDA_MAX - 1)
 414
 415 #define NDA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
 416 #define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
 417
 418 /*
 419  *      Neighbor Cache Entry Flags
 420  */
 421
 422 #define NTF_PROXY       0x08    /* == ATF_PUBL */
 423 #define NTF_ROUTER      0x80
 424
 425 /*
 426  *      Neighbor Cache Entry States.
 427  */
 428
 429 #define NUD_INCOMPLETE  0x01
 430 #define NUD_REACHABLE   0x02
 431 #define NUD_STALE       0x04
 432 #define NUD_DELAY       0x08
 433 #define NUD_PROBE       0x10
 434 #define NUD_FAILED      0x20
 435
 436 /* Dummy states */
 437 #define NUD_NOARP       0x40
 438 #define NUD_PERMANENT   0x80
 439 #define NUD_NONE        0x00
 440
 441
 442 struct nda_cacheinfo
 443 {
 444         __u32           ndm_confirmed;
 445         __u32           ndm_used;
 446         __u32           ndm_updated;
 447         __u32           ndm_refcnt;
 448 };
 449
 450
 451 /*****************************************************************
 452  *              Neighbour tables specific messages.
 453  *
 454  * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the
 455  * NLM_F_DUMP flag set. Every neighbour table configuration is
 456  * spread over multiple messages to avoid running into message
 457  * size limits on systems with many interfaces. The first message
 458  * in the sequence transports all not device specific data such as
 459  * statistics, configuration, and the default parameter set.
 460  * This message is followed by 0..n messages carrying device
 461  * specific parameter sets.
 462  * Although the ordering should be sufficient, NDTA_NAME can be
 463  * used to identify sequences. The initial message can be identified
 464  * by checking for NDTA_CONFIG. The device specific messages do
 465  * not contain this TLV but have NDTPA_IFINDEX set to the
 466  * corresponding interface index.
 467  *
 468  * To change neighbour table attributes, send RTM_SETNEIGHTBL
 469  * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3],
 470  * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked
 471  * otherwise. Device specific parameter sets can be changed by
 472  * setting NDTPA_IFINDEX to the interface index of the corresponding
 473  * device.
 474  ****/
 475
 476 struct ndt_stats
 477 {
 478         __u64           ndts_allocs;
 479         __u64           ndts_destroys;
 480         __u64           ndts_hash_grows;
 481         __u64           ndts_res_failed;
 482         __u64           ndts_lookups;
 483         __u64           ndts_hits;
 484         __u64           ndts_rcv_probes_mcast;
 485         __u64           ndts_rcv_probes_ucast;
 486         __u64           ndts_periodic_gc_runs;
 487         __u64           ndts_forced_gc_runs;
 488 };
 489
 490 enum {
 491         NDTPA_UNSPEC,
 492         NDTPA_IFINDEX,                  /* u32, unchangeable */
 493         NDTPA_REFCNT,                   /* u32, read-only */
 494         NDTPA_REACHABLE_TIME,           /* u64, read-only, msecs */
 495         NDTPA_BASE_REACHABLE_TIME,      /* u64, msecs */
 496         NDTPA_RETRANS_TIME,             /* u64, msecs */
 497         NDTPA_GC_STALETIME,             /* u64, msecs */
 498         NDTPA_DELAY_PROBE_TIME,         /* u64, msecs */
 499         NDTPA_QUEUE_LEN,                /* u32 */
 500         NDTPA_APP_PROBES,               /* u32 */
 501         NDTPA_UCAST_PROBES,             /* u32 */
 502         NDTPA_MCAST_PROBES,             /* u32 */
 503         NDTPA_ANYCAST_DELAY,            /* u64, msecs */
 504         NDTPA_PROXY_DELAY,              /* u64, msecs */
 505         NDTPA_PROXY_QLEN,               /* u32 */
 506         NDTPA_LOCKTIME,                 /* u64, msecs */
 507         __NDTPA_MAX
 508 };
 509 #define NDTPA_MAX (__NDTPA_MAX - 1)
 510
 511 struct ndtmsg
 512 {
 513         __u8            ndtm_family;
 514         __u8            ndtm_pad1;
 515         __u16           ndtm_pad2;
 516 };
 517
 518 struct ndt_config
 519 {
 520         __u16           ndtc_key_len;
 521         __u16           ndtc_entry_size;
 522         __u32           ndtc_entries;
 523         __u32           ndtc_last_flush;        /* delta to now in msecs */
 524         __u32           ndtc_last_rand;         /* delta to now in msecs */
 525         __u32           ndtc_hash_rnd;
 526         __u32           ndtc_hash_mask;
 527         __u32           ndtc_hash_chain_gc;
 528         __u32           ndtc_proxy_qlen;
 529 };
 530
 531 enum {
 532         NDTA_UNSPEC,
 533         NDTA_NAME,                      /* char *, unchangeable */
 534         NDTA_THRESH1,                   /* u32 */
 535         NDTA_THRESH2,                   /* u32 */
 536         NDTA_THRESH3,                   /* u32 */
 537         NDTA_CONFIG,                    /* struct ndt_config, read-only */
 538         NDTA_PARMS,                     /* nested TLV NDTPA_* */
 539         NDTA_STATS,                     /* struct ndt_stats, read-only */
 540         NDTA_GC_INTERVAL,               /* u64, msecs */
 541         __NDTA_MAX
 542 };
 543 #define NDTA_MAX (__NDTA_MAX - 1)
 544
 545 #define NDTA_RTA(r) ((struct rtattr*)(((char*)(r)) + \
 546                      NLMSG_ALIGN(sizeof(struct ndtmsg))))
 547 #define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndtmsg))
 548
 549
 550 /****
 551  *              General form of address family dependent message.
 552  ****/
 553
 554 struct rtgenmsg
 555 {
 556         unsigned char           rtgen_family;
 557 };
 558
 559 /*****************************************************************
 560  *              Link layer specific messages.
 561  ****/
 562
 563 /* struct ifinfomsg
 564  * passes link level specific information, not dependent
 565  * on network protocol.
 566  */
 567
 568 struct ifinfomsg
 569 {
 570         unsigned char   ifi_family;
 571         unsigned char   __ifi_pad;
 572         unsigned short  ifi_type;               /* ARPHRD_* */
 573         int             ifi_index;              /* Link index   */
 574         unsigned        ifi_flags;              /* IFF_* flags  */
 575         unsigned        ifi_change;             /* IFF_* change mask */
 576 };
 577
 578 /********************************************************************
 579  *              prefix information
 580  ****/
 581
 582 struct prefixmsg
 583 {
 584         unsigned char   prefix_family;
 585         unsigned char   prefix_pad1;
 586         unsigned short  prefix_pad2;
 587         int             prefix_ifindex;
 588         unsigned char   prefix_type;
 589         unsigned char   prefix_len;
 590         unsigned char   prefix_flags;
 591         unsigned char   prefix_pad3;
 592 };
 593
 594 enum
 595 {
 596         PREFIX_UNSPEC,
 597         PREFIX_ADDRESS,
 598         PREFIX_CACHEINFO,
 599         __PREFIX_MAX
 600 };
 601
 602 #define PREFIX_MAX      (__PREFIX_MAX - 1)
 603
 604 struct prefix_cacheinfo
 605 {
 606         __u32   preferred_time;
 607         __u32   valid_time;
 608 };
 609
 610 /* The struct should be in sync with struct net_device_stats */
 611 struct rtnl_link_stats
 612 {
 613         __u32   rx_packets;             /* total packets received       */
 614         __u32   tx_packets;             /* total packets transmitted    */
 615         __u32   rx_bytes;               /* total bytes received         */
 616         __u32   tx_bytes;               /* total bytes transmitted      */
 617         __u32   rx_errors;              /* bad packets received         */
 618         __u32   tx_errors;              /* packet transmit problems     */
 619         __u32   rx_dropped;             /* no space in linux buffers    */
 620         __u32   tx_dropped;             /* no space available in linux  */
 621         __u32   multicast;              /* multicast packets received   */
 622         __u32   collisions;
 623
 624         /* detailed rx_errors: */
 625         __u32   rx_length_errors;
 626         __u32   rx_over_errors;         /* receiver ring buff overflow  */
 627         __u32   rx_crc_errors;          /* recved pkt with crc error    */
 628         __u32   rx_frame_errors;        /* recv'd frame alignment error */
 629         __u32   rx_fifo_errors;         /* recv'r fifo overrun          */
 630         __u32   rx_missed_errors;       /* receiver missed packet       */
 631
 632         /* detailed tx_errors */
 633         __u32   tx_aborted_errors;
 634         __u32   tx_carrier_errors;
 635         __u32   tx_fifo_errors;
 636         __u32   tx_heartbeat_errors;
 637         __u32   tx_window_errors;
 638
 639         /* for cslip etc */
 640         __u32   rx_compressed;
 641         __u32   tx_compressed;
 642 };
 643
 644 /* The struct should be in sync with struct ifmap */
 645 struct rtnl_link_ifmap
 646 {
 647         __u64   mem_start;
 648         __u64   mem_end;
 649         __u64   base_addr;
 650         __u16   irq;
 651         __u8    dma;
 652         __u8    port;
 653 };
 654
 655 enum
 656 {
 657         IFLA_UNSPEC,
 658         IFLA_ADDRESS,
 659         IFLA_BROADCAST,
 660         IFLA_IFNAME,
 661         IFLA_MTU,
 662         IFLA_LINK,
 663         IFLA_QDISC,
 664         IFLA_STATS,
 665         IFLA_COST,
 666 #define IFLA_COST IFLA_COST
 667         IFLA_PRIORITY,
 668 #define IFLA_PRIORITY IFLA_PRIORITY
 669         IFLA_MASTER,
 670 #define IFLA_MASTER IFLA_MASTER
 671         IFLA_WIRELESS,          /* Wireless Extension event - see wireless.h */
 672 #define IFLA_WIRELESS IFLA_WIRELESS
 673         IFLA_PROTINFO,          /* Protocol specific information for a link */
 674 #define IFLA_PROTINFO IFLA_PROTINFO
 675         IFLA_TXQLEN,
 676 #define IFLA_TXQLEN IFLA_TXQLEN
 677         IFLA_MAP,
 678 #define IFLA_MAP IFLA_MAP
 679         IFLA_WEIGHT,
 680 #define IFLA_WEIGHT IFLA_WEIGHT
 681         IFLA_OPERSTATE,
 682         IFLA_LINKMODE,
 683         __IFLA_MAX
 684 };
 685
 686
 687 #define IFLA_MAX (__IFLA_MAX - 1)
 688
 689 #define IFLA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
 690 #define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
 691
 692 /* ifi_flags.
 693
 694    IFF_* flags.
 695
 696    The only change is:
 697    IFF_LOOPBACK, IFF_BROADCAST and IFF_POINTOPOINT are
 698    more not changeable by user. They describe link media
 699    characteristics and set by device driver.
 700
 701    Comments:
 702    - Combination IFF_BROADCAST|IFF_POINTOPOINT is invalid
 703    - If neither of these three flags are set;
 704      the interface is NBMA.
 705
 706    - IFF_MULTICAST does not mean anything special:
 707    multicasts can be used on all not-NBMA links.
 708    IFF_MULTICAST means that this media uses special encapsulation
 709    for multicast frames. Apparently, all IFF_POINTOPOINT and
 710    IFF_BROADCAST devices are able to use multicasts too.
 711  */
 712
 713 /* IFLA_LINK.
 714    For usual devices it is equal ifi_index.
 715    If it is a "virtual interface" (f.e. tunnel), ifi_link
 716    can point to real physical interface (f.e. for bandwidth calculations),
 717    or maybe 0, what means, that real media is unknown (usual
 718    for IPIP tunnels, when route to endpoint is allowed to change)
 719  */
 720
 721 /* Subtype attributes for IFLA_PROTINFO */
 722 enum
 723 {
 724         IFLA_INET6_UNSPEC,
 725         IFLA_INET6_FLAGS,       /* link flags                   */
 726         IFLA_INET6_CONF,        /* sysctl parameters            */
 727         IFLA_INET6_STATS,       /* statistics                   */
 728         IFLA_INET6_MCAST,       /* MC things. What of them?     */
 729         IFLA_INET6_CACHEINFO,   /* time values and max reasm size */
 730         __IFLA_INET6_MAX
 731 };
 732
 733 #define IFLA_INET6_MAX  (__IFLA_INET6_MAX - 1)
 734
 735 struct ifla_cacheinfo
 736 {
 737         __u32   max_reasm_len;
 738         __u32   tstamp;         /* ipv6InterfaceTable updated timestamp */
 739         __u32   reachable_time;
 740         __u32   retrans_time;
 741 };
 742
 743 /*****************************************************************
 744  *              Traffic control messages.
 745  ****/
 746
 747 struct tcmsg
 748 {
 749         unsigned char   tcm_family;
 750         unsigned char   tcm__pad1;
 751         unsigned short  tcm__pad2;
 752         int             tcm_ifindex;
 753         __u32           tcm_handle;
 754         __u32           tcm_parent;
 755         __u32           tcm_info;
 756 };
 757
 758 enum
 759 {
 760         TCA_UNSPEC,
 761         TCA_KIND,
 762         TCA_OPTIONS,
 763         TCA_STATS,
 764         TCA_XSTATS,
 765         TCA_RATE,
 766         TCA_FCNT,
 767         TCA_STATS2,
 768         __TCA_MAX
 769 };
 770
 771 #define TCA_MAX (__TCA_MAX - 1)
 772
 773 #define TCA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
 774 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
 775
 776 #ifndef __KERNEL__
 777 /* RTnetlink multicast groups - backwards compatibility for userspace */
 778 #define RTMGRP_LINK             1
 779 #define RTMGRP_NOTIFY           2
 780 #define RTMGRP_NEIGH            4
 781 #define RTMGRP_TC               8
 782
 783 #define RTMGRP_IPV4_IFADDR      0x10
 784 #define RTMGRP_IPV4_MROUTE      0x20
 785 #define RTMGRP_IPV4_ROUTE       0x40
 786 #define RTMGRP_IPV4_RULE        0x80
 787
 788 #define RTMGRP_IPV6_IFADDR      0x100
 789 #define RTMGRP_IPV6_MROUTE      0x200
 790 #define RTMGRP_IPV6_ROUTE       0x400
 791 #define RTMGRP_IPV6_IFINFO      0x800
 792
 793 #define RTMGRP_DECnet_IFADDR    0x1000
 794 #define RTMGRP_DECnet_ROUTE     0x4000
 795
 796 #define RTMGRP_IPV6_PREFIX      0x20000
 797 #endif
 798
 799 /* RTnetlink multicast groups */
 800 enum rtnetlink_groups {
 801         RTNLGRP_NONE,
 802 #define RTNLGRP_NONE            RTNLGRP_NONE
 803         RTNLGRP_LINK,
 804 #define RTNLGRP_LINK            RTNLGRP_LINK
 805         RTNLGRP_NOTIFY,
 806 #define RTNLGRP_NOTIFY          RTNLGRP_NOTIFY
 807         RTNLGRP_NEIGH,
 808 #define RTNLGRP_NEIGH           RTNLGRP_NEIGH
 809         RTNLGRP_TC,
 810 #define RTNLGRP_TC              RTNLGRP_TC
 811         RTNLGRP_IPV4_IFADDR,
 812 #define RTNLGRP_IPV4_IFADDR     RTNLGRP_IPV4_IFADDR
 813         RTNLGRP_IPV4_MROUTE,
 814 #define RTNLGRP_IPV4_MROUTE     RTNLGRP_IPV4_MROUTE
 815         RTNLGRP_IPV4_ROUTE,
 816 #define RTNLGRP_IPV4_ROUTE      RTNLGRP_IPV4_ROUTE
 817         RTNLGRP_IPV4_RULE,
 818 #define RTNLGRP_IPV4_RULE       RTNLGRP_IPV4_RULE
 819         RTNLGRP_IPV6_IFADDR,
 820 #define RTNLGRP_IPV6_IFADDR     RTNLGRP_IPV6_IFADDR
 821         RTNLGRP_IPV6_MROUTE,
 822 #define RTNLGRP_IPV6_MROUTE     RTNLGRP_IPV6_MROUTE
 823         RTNLGRP_IPV6_ROUTE,
 824 #define RTNLGRP_IPV6_ROUTE      RTNLGRP_IPV6_ROUTE
 825         RTNLGRP_IPV6_IFINFO,
 826 #define RTNLGRP_IPV6_IFINFO     RTNLGRP_IPV6_IFINFO
 827         RTNLGRP_DECnet_IFADDR,
 828 #define RTNLGRP_DECnet_IFADDR   RTNLGRP_DECnet_IFADDR
 829         RTNLGRP_NOP2,
 830         RTNLGRP_DECnet_ROUTE,
 831 #define RTNLGRP_DECnet_ROUTE    RTNLGRP_DECnet_ROUTE
 832         RTNLGRP_NOP3,
 833         RTNLGRP_NOP4,
 834         RTNLGRP_IPV6_PREFIX,
 835 #define RTNLGRP_IPV6_PREFIX     RTNLGRP_IPV6_PREFIX
 836         RTNLGRP_IPV6_RULE,
 837 #define RTNLGRP_IPV6_RULE       RTNLGRP_IPV6_RULE
 838         __RTNLGRP_MAX
 839 };
 840 #define RTNLGRP_MAX     (__RTNLGRP_MAX - 1)
 841
 842 /* TC action piece */
 843 struct tcamsg
 844 {
 845         unsigned char   tca_family;
 846         unsigned char   tca__pad1;
 847         unsigned short  tca__pad2;
 848 };
 849 #define TA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
 850 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
 851 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
 852 #define TCAA_MAX 1
 853
 854 /* End of information exported to user level */
 855
 856 #ifdef __KERNEL__
 857
 858 #include <linux/mutex.h>
 859
 860 extern size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size);
 861 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
 862 {
 863         int len = strlen(str) + 1;
 864         return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
 865 }
 866
 867 extern int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len);
 868
 869 #define rtattr_parse_nested(tb, max, rta) \
 870         rtattr_parse((tb), (max), RTA_DATA((rta)), RTA_PAYLOAD((rta)))
 871
 872 extern struct sock *rtnl;
 873
 874 struct rtnetlink_link
 875 {
 876         int (*doit)(struct sk_buff *, struct nlmsghdr*, void *attr);
 877         int (*dumpit)(struct sk_buff *, struct netlink_callback *cb);
 878 };
 879
 880 extern struct rtnetlink_link * rtnetlink_links[NPROTO];
 881 extern int rtnetlink_send(struct sk_buff *skb, u32 pid, u32 group, int echo);
 882 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
 883
 884 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
 885
 886 #define RTA_PUT(skb, attrtype, attrlen, data) \
 887 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
 888                  goto rtattr_failure; \
 889         __rta_fill(skb, attrtype, attrlen, data); })
 890
 891 #define RTA_APPEND(skb, attrlen, data) \
 892 ({      if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
 893                 goto rtattr_failure; \
 894         memcpy(skb_put(skb, attrlen), data, attrlen); })
 895
 896 #define RTA_PUT_NOHDR(skb, attrlen, data) \
 897 ({      RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \
 898         memset(skb->tail - (RTA_ALIGN(attrlen) - attrlen), 0, \
 899                RTA_ALIGN(attrlen) - attrlen); })
 900
 901 #define RTA_PUT_U8(skb, attrtype, value) \
 902 ({      u8 _tmp = (value); \
 903         RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })
 904
 905 #define RTA_PUT_U16(skb, attrtype, value) \
 906 ({      u16 _tmp = (value); \
 907         RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })
 908
 909 #define RTA_PUT_U32(skb, attrtype, value) \
 910 ({      u32 _tmp = (value); \
 911         RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
 912
 913 #define RTA_PUT_U64(skb, attrtype, value) \
 914 ({      u64 _tmp = (value); \
 915         RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
 916
 917 #define RTA_PUT_SECS(skb, attrtype, value) \
 918         RTA_PUT_U64(skb, attrtype, (value) / HZ)
 919
 920 #define RTA_PUT_MSECS(skb, attrtype, value) \
 921         RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
 922
 923 #define RTA_PUT_STRING(skb, attrtype, value) \
 924         RTA_PUT(skb, attrtype, strlen(value) + 1, value)
 925
 926 #define RTA_PUT_FLAG(skb, attrtype) \
 927         RTA_PUT(skb, attrtype, 0, NULL);
 928
 929 #define RTA_NEST(skb, type) \
 930 ({      struct rtattr *__start = (struct rtattr *) (skb)->tail; \
 931         RTA_PUT(skb, type, 0, NULL); \
 932         __start;  })
 933
 934 #define RTA_NEST_END(skb, start) \
 935 ({      (start)->rta_len = ((skb)->tail - (unsigned char *) (start)); \
 936         (skb)->len; })
 937
 938 #define RTA_NEST_CANCEL(skb, start) \
 939 ({      if (start) \
 940                 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
 941         -1; })
 942
 943 #define RTA_GET_U8(rta) \
 944 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
 945                 goto rtattr_failure; \
 946         *(u8 *) RTA_DATA(rta); })
 947
 948 #define RTA_GET_U16(rta) \
 949 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
 950                 goto rtattr_failure; \
 951         *(u16 *) RTA_DATA(rta); })
 952
 953 #define RTA_GET_U32(rta) \
 954 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
 955                 goto rtattr_failure; \
 956         *(u32 *) RTA_DATA(rta); })
 957
 958 #define RTA_GET_U64(rta) \
 959 ({      u64 _tmp; \
 960         if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
 961                 goto rtattr_failure; \
 962         memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
 963         _tmp; })
 964
 965 #define RTA_GET_FLAG(rta) (!!(rta))
 966
 967 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
 968 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
 969
 970 static inline struct rtattr *
 971 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
 972 {
 973         struct rtattr *rta;
 974         int size = RTA_LENGTH(attrlen);
 975
 976         rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
 977         rta->rta_type = attrtype;
 978         rta->rta_len = size;
 979         memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
 980         return rta;
 981 }
 982
 983 #define __RTA_PUT(skb, attrtype, attrlen) \
 984 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
 985                 goto rtattr_failure; \
 986         __rta_reserve(skb, attrtype, attrlen); })
 987
 988 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
 989
 990 /* RTNL is used as a global lock for all changes to network configuration  */
 991 extern void rtnl_lock(void);
 992 extern void rtnl_unlock(void);
 993 extern int rtnl_trylock(void);
 994
 995 extern void rtnetlink_init(void);
 996 extern void __rtnl_unlock(void);
 997
 998 #define ASSERT_RTNL() do { \
 999         if (unlikely(rtnl_trylock())) { \
1000                 rtnl_unlock(); \
1001                 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
1002                        __FILE__,  __LINE__); \
1003                 dump_stack(); \
1004         } \
1005 } while(0)
1006
1007 #define BUG_TRAP(x) do { \
1008         if (unlikely(!(x))) { \
1009                 printk(KERN_ERR "KERNEL: assertion (%s) failed at %s (%d)\n", \
1010                         #x,  __FILE__ , __LINE__); \
1011         } \
1012 } while(0)
1013
1014 #endif /* __KERNEL__ */
1015
1016
1017 #endif  /* __LINUX_RTNETLINK_H */