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  *              Interface address.
 389  ****/
 390
 391 struct ifaddrmsg
 392 {
 393         unsigned char   ifa_family;
 394         unsigned char   ifa_prefixlen;  /* The prefix length            */
 395         unsigned char   ifa_flags;      /* Flags                        */
 396         unsigned char   ifa_scope;      /* See above                    */
 397         int             ifa_index;      /* Link index                   */
 398 };
 399
 400 enum
 401 {
 402         IFA_UNSPEC,
 403         IFA_ADDRESS,
 404         IFA_LOCAL,
 405         IFA_LABEL,
 406         IFA_BROADCAST,
 407         IFA_ANYCAST,
 408         IFA_CACHEINFO,
 409         IFA_MULTICAST,
 410         __IFA_MAX
 411 };
 412
 413 #define IFA_MAX (__IFA_MAX - 1)
 414
 415 /* ifa_flags */
 416
 417 #define IFA_F_SECONDARY         0x01
 418 #define IFA_F_TEMPORARY         IFA_F_SECONDARY
 419
 420 #define IFA_F_DEPRECATED        0x20
 421 #define IFA_F_TENTATIVE         0x40
 422 #define IFA_F_PERMANENT         0x80
 423
 424 struct ifa_cacheinfo
 425 {
 426         __u32   ifa_prefered;
 427         __u32   ifa_valid;
 428         __u32   cstamp; /* created timestamp, hundredths of seconds */
 429         __u32   tstamp; /* updated timestamp, hundredths of seconds */
 430 };
 431
 432
 433 #define IFA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
 434 #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
 435
 436 /*
 437    Important comment:
 438    IFA_ADDRESS is prefix address, rather than local interface address.
 439    It makes no difference for normally configured broadcast interfaces,
 440    but for point-to-point IFA_ADDRESS is DESTINATION address,
 441    local address is supplied in IFA_LOCAL attribute.
 442  */
 443
 444 /**************************************************************
 445  *              Neighbour discovery.
 446  ****/
 447
 448 struct ndmsg
 449 {
 450         unsigned char   ndm_family;
 451         unsigned char   ndm_pad1;
 452         unsigned short  ndm_pad2;
 453         int             ndm_ifindex;    /* Link index                   */
 454         __u16           ndm_state;
 455         __u8            ndm_flags;
 456         __u8            ndm_type;
 457 };
 458
 459 enum
 460 {
 461         NDA_UNSPEC,
 462         NDA_DST,
 463         NDA_LLADDR,
 464         NDA_CACHEINFO,
 465         NDA_PROBES,
 466         __NDA_MAX
 467 };
 468
 469 #define NDA_MAX (__NDA_MAX - 1)
 470
 471 #define NDA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
 472 #define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
 473
 474 /*
 475  *      Neighbor Cache Entry Flags
 476  */
 477
 478 #define NTF_PROXY       0x08    /* == ATF_PUBL */
 479 #define NTF_ROUTER      0x80
 480
 481 /*
 482  *      Neighbor Cache Entry States.
 483  */
 484
 485 #define NUD_INCOMPLETE  0x01
 486 #define NUD_REACHABLE   0x02
 487 #define NUD_STALE       0x04
 488 #define NUD_DELAY       0x08
 489 #define NUD_PROBE       0x10
 490 #define NUD_FAILED      0x20
 491
 492 /* Dummy states */
 493 #define NUD_NOARP       0x40
 494 #define NUD_PERMANENT   0x80
 495 #define NUD_NONE        0x00
 496
 497
 498 struct nda_cacheinfo
 499 {
 500         __u32           ndm_confirmed;
 501         __u32           ndm_used;
 502         __u32           ndm_updated;
 503         __u32           ndm_refcnt;
 504 };
 505
 506
 507 /*****************************************************************
 508  *              Neighbour tables specific messages.
 509  *
 510  * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the
 511  * NLM_F_DUMP flag set. Every neighbour table configuration is
 512  * spread over multiple messages to avoid running into message
 513  * size limits on systems with many interfaces. The first message
 514  * in the sequence transports all not device specific data such as
 515  * statistics, configuration, and the default parameter set.
 516  * This message is followed by 0..n messages carrying device
 517  * specific parameter sets.
 518  * Although the ordering should be sufficient, NDTA_NAME can be
 519  * used to identify sequences. The initial message can be identified
 520  * by checking for NDTA_CONFIG. The device specific messages do
 521  * not contain this TLV but have NDTPA_IFINDEX set to the
 522  * corresponding interface index.
 523  *
 524  * To change neighbour table attributes, send RTM_SETNEIGHTBL
 525  * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3],
 526  * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked
 527  * otherwise. Device specific parameter sets can be changed by
 528  * setting NDTPA_IFINDEX to the interface index of the corresponding
 529  * device.
 530  ****/
 531
 532 struct ndt_stats
 533 {
 534         __u64           ndts_allocs;
 535         __u64           ndts_destroys;
 536         __u64           ndts_hash_grows;
 537         __u64           ndts_res_failed;
 538         __u64           ndts_lookups;
 539         __u64           ndts_hits;
 540         __u64           ndts_rcv_probes_mcast;
 541         __u64           ndts_rcv_probes_ucast;
 542         __u64           ndts_periodic_gc_runs;
 543         __u64           ndts_forced_gc_runs;
 544 };
 545
 546 enum {
 547         NDTPA_UNSPEC,
 548         NDTPA_IFINDEX,                  /* u32, unchangeable */
 549         NDTPA_REFCNT,                   /* u32, read-only */
 550         NDTPA_REACHABLE_TIME,           /* u64, read-only, msecs */
 551         NDTPA_BASE_REACHABLE_TIME,      /* u64, msecs */
 552         NDTPA_RETRANS_TIME,             /* u64, msecs */
 553         NDTPA_GC_STALETIME,             /* u64, msecs */
 554         NDTPA_DELAY_PROBE_TIME,         /* u64, msecs */
 555         NDTPA_QUEUE_LEN,                /* u32 */
 556         NDTPA_APP_PROBES,               /* u32 */
 557         NDTPA_UCAST_PROBES,             /* u32 */
 558         NDTPA_MCAST_PROBES,             /* u32 */
 559         NDTPA_ANYCAST_DELAY,            /* u64, msecs */
 560         NDTPA_PROXY_DELAY,              /* u64, msecs */
 561         NDTPA_PROXY_QLEN,               /* u32 */
 562         NDTPA_LOCKTIME,                 /* u64, msecs */
 563         __NDTPA_MAX
 564 };
 565 #define NDTPA_MAX (__NDTPA_MAX - 1)
 566
 567 struct ndtmsg
 568 {
 569         __u8            ndtm_family;
 570         __u8            ndtm_pad1;
 571         __u16           ndtm_pad2;
 572 };
 573
 574 struct ndt_config
 575 {
 576         __u16           ndtc_key_len;
 577         __u16           ndtc_entry_size;
 578         __u32           ndtc_entries;
 579         __u32           ndtc_last_flush;        /* delta to now in msecs */
 580         __u32           ndtc_last_rand;         /* delta to now in msecs */
 581         __u32           ndtc_hash_rnd;
 582         __u32           ndtc_hash_mask;
 583         __u32           ndtc_hash_chain_gc;
 584         __u32           ndtc_proxy_qlen;
 585 };
 586
 587 enum {
 588         NDTA_UNSPEC,
 589         NDTA_NAME,                      /* char *, unchangeable */
 590         NDTA_THRESH1,                   /* u32 */
 591         NDTA_THRESH2,                   /* u32 */
 592         NDTA_THRESH3,                   /* u32 */
 593         NDTA_CONFIG,                    /* struct ndt_config, read-only */
 594         NDTA_PARMS,                     /* nested TLV NDTPA_* */
 595         NDTA_STATS,                     /* struct ndt_stats, read-only */
 596         NDTA_GC_INTERVAL,               /* u64, msecs */
 597         __NDTA_MAX
 598 };
 599 #define NDTA_MAX (__NDTA_MAX - 1)
 600
 601 #define NDTA_RTA(r) ((struct rtattr*)(((char*)(r)) + \
 602                      NLMSG_ALIGN(sizeof(struct ndtmsg))))
 603 #define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndtmsg))
 604
 605
 606 /****
 607  *              General form of address family dependent message.
 608  ****/
 609
 610 struct rtgenmsg
 611 {
 612         unsigned char           rtgen_family;
 613 };
 614
 615 /*****************************************************************
 616  *              Link layer specific messages.
 617  ****/
 618
 619 /* struct ifinfomsg
 620  * passes link level specific information, not dependent
 621  * on network protocol.
 622  */
 623
 624 struct ifinfomsg
 625 {
 626         unsigned char   ifi_family;
 627         unsigned char   __ifi_pad;
 628         unsigned short  ifi_type;               /* ARPHRD_* */
 629         int             ifi_index;              /* Link index   */
 630         unsigned        ifi_flags;              /* IFF_* flags  */
 631         unsigned        ifi_change;             /* IFF_* change mask */
 632 };
 633
 634 /********************************************************************
 635  *              prefix information
 636  ****/
 637
 638 struct prefixmsg
 639 {
 640         unsigned char   prefix_family;
 641         unsigned char   prefix_pad1;
 642         unsigned short  prefix_pad2;
 643         int             prefix_ifindex;
 644         unsigned char   prefix_type;
 645         unsigned char   prefix_len;
 646         unsigned char   prefix_flags;
 647         unsigned char   prefix_pad3;
 648 };
 649
 650 enum
 651 {
 652         PREFIX_UNSPEC,
 653         PREFIX_ADDRESS,
 654         PREFIX_CACHEINFO,
 655         __PREFIX_MAX
 656 };
 657
 658 #define PREFIX_MAX      (__PREFIX_MAX - 1)
 659
 660 struct prefix_cacheinfo
 661 {
 662         __u32   preferred_time;
 663         __u32   valid_time;
 664 };
 665
 666 /* The struct should be in sync with struct net_device_stats */
 667 struct rtnl_link_stats
 668 {
 669         __u32   rx_packets;             /* total packets received       */
 670         __u32   tx_packets;             /* total packets transmitted    */
 671         __u32   rx_bytes;               /* total bytes received         */
 672         __u32   tx_bytes;               /* total bytes transmitted      */
 673         __u32   rx_errors;              /* bad packets received         */
 674         __u32   tx_errors;              /* packet transmit problems     */
 675         __u32   rx_dropped;             /* no space in linux buffers    */
 676         __u32   tx_dropped;             /* no space available in linux  */
 677         __u32   multicast;              /* multicast packets received   */
 678         __u32   collisions;
 679
 680         /* detailed rx_errors: */
 681         __u32   rx_length_errors;
 682         __u32   rx_over_errors;         /* receiver ring buff overflow  */
 683         __u32   rx_crc_errors;          /* recved pkt with crc error    */
 684         __u32   rx_frame_errors;        /* recv'd frame alignment error */
 685         __u32   rx_fifo_errors;         /* recv'r fifo overrun          */
 686         __u32   rx_missed_errors;       /* receiver missed packet       */
 687
 688         /* detailed tx_errors */
 689         __u32   tx_aborted_errors;
 690         __u32   tx_carrier_errors;
 691         __u32   tx_fifo_errors;
 692         __u32   tx_heartbeat_errors;
 693         __u32   tx_window_errors;
 694
 695         /* for cslip etc */
 696         __u32   rx_compressed;
 697         __u32   tx_compressed;
 698 };
 699
 700 /* The struct should be in sync with struct ifmap */
 701 struct rtnl_link_ifmap
 702 {
 703         __u64   mem_start;
 704         __u64   mem_end;
 705         __u64   base_addr;
 706         __u16   irq;
 707         __u8    dma;
 708         __u8    port;
 709 };
 710
 711 enum
 712 {
 713         IFLA_UNSPEC,
 714         IFLA_ADDRESS,
 715         IFLA_BROADCAST,
 716         IFLA_IFNAME,
 717         IFLA_MTU,
 718         IFLA_LINK,
 719         IFLA_QDISC,
 720         IFLA_STATS,
 721         IFLA_COST,
 722 #define IFLA_COST IFLA_COST
 723         IFLA_PRIORITY,
 724 #define IFLA_PRIORITY IFLA_PRIORITY
 725         IFLA_MASTER,
 726 #define IFLA_MASTER IFLA_MASTER
 727         IFLA_WIRELESS,          /* Wireless Extension event - see wireless.h */
 728 #define IFLA_WIRELESS IFLA_WIRELESS
 729         IFLA_PROTINFO,          /* Protocol specific information for a link */
 730 #define IFLA_PROTINFO IFLA_PROTINFO
 731         IFLA_TXQLEN,
 732 #define IFLA_TXQLEN IFLA_TXQLEN
 733         IFLA_MAP,
 734 #define IFLA_MAP IFLA_MAP
 735         IFLA_WEIGHT,
 736 #define IFLA_WEIGHT IFLA_WEIGHT
 737         IFLA_OPERSTATE,
 738         IFLA_LINKMODE,
 739         __IFLA_MAX
 740 };
 741
 742
 743 #define IFLA_MAX (__IFLA_MAX - 1)
 744
 745 #define IFLA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
 746 #define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
 747
 748 /* ifi_flags.
 749
 750    IFF_* flags.
 751
 752    The only change is:
 753    IFF_LOOPBACK, IFF_BROADCAST and IFF_POINTOPOINT are
 754    more not changeable by user. They describe link media
 755    characteristics and set by device driver.
 756
 757    Comments:
 758    - Combination IFF_BROADCAST|IFF_POINTOPOINT is invalid
 759    - If neither of these three flags are set;
 760      the interface is NBMA.
 761
 762    - IFF_MULTICAST does not mean anything special:
 763    multicasts can be used on all not-NBMA links.
 764    IFF_MULTICAST means that this media uses special encapsulation
 765    for multicast frames. Apparently, all IFF_POINTOPOINT and
 766    IFF_BROADCAST devices are able to use multicasts too.
 767  */
 768
 769 /* IFLA_LINK.
 770    For usual devices it is equal ifi_index.
 771    If it is a "virtual interface" (f.e. tunnel), ifi_link
 772    can point to real physical interface (f.e. for bandwidth calculations),
 773    or maybe 0, what means, that real media is unknown (usual
 774    for IPIP tunnels, when route to endpoint is allowed to change)
 775  */
 776
 777 /* Subtype attributes for IFLA_PROTINFO */
 778 enum
 779 {
 780         IFLA_INET6_UNSPEC,
 781         IFLA_INET6_FLAGS,       /* link flags                   */
 782         IFLA_INET6_CONF,        /* sysctl parameters            */
 783         IFLA_INET6_STATS,       /* statistics                   */
 784         IFLA_INET6_MCAST,       /* MC things. What of them?     */
 785         IFLA_INET6_CACHEINFO,   /* time values and max reasm size */
 786         __IFLA_INET6_MAX
 787 };
 788
 789 #define IFLA_INET6_MAX  (__IFLA_INET6_MAX - 1)
 790
 791 struct ifla_cacheinfo
 792 {
 793         __u32   max_reasm_len;
 794         __u32   tstamp;         /* ipv6InterfaceTable updated timestamp */
 795         __u32   reachable_time;
 796         __u32   retrans_time;
 797 };
 798
 799 /*****************************************************************
 800  *              Traffic control messages.
 801  ****/
 802
 803 struct tcmsg
 804 {
 805         unsigned char   tcm_family;
 806         unsigned char   tcm__pad1;
 807         unsigned short  tcm__pad2;
 808         int             tcm_ifindex;
 809         __u32           tcm_handle;
 810         __u32           tcm_parent;
 811         __u32           tcm_info;
 812 };
 813
 814 enum
 815 {
 816         TCA_UNSPEC,
 817         TCA_KIND,
 818         TCA_OPTIONS,
 819         TCA_STATS,
 820         TCA_XSTATS,
 821         TCA_RATE,
 822         TCA_FCNT,
 823         TCA_STATS2,
 824         __TCA_MAX
 825 };
 826
 827 #define TCA_MAX (__TCA_MAX - 1)
 828
 829 #define TCA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
 830 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
 831
 832 #ifndef __KERNEL__
 833 /* RTnetlink multicast groups - backwards compatibility for userspace */
 834 #define RTMGRP_LINK             1
 835 #define RTMGRP_NOTIFY           2
 836 #define RTMGRP_NEIGH            4
 837 #define RTMGRP_TC               8
 838
 839 #define RTMGRP_IPV4_IFADDR      0x10
 840 #define RTMGRP_IPV4_MROUTE      0x20
 841 #define RTMGRP_IPV4_ROUTE       0x40
 842
 843 #define RTMGRP_IPV6_IFADDR      0x100
 844 #define RTMGRP_IPV6_MROUTE      0x200
 845 #define RTMGRP_IPV6_ROUTE       0x400
 846 #define RTMGRP_IPV6_IFINFO      0x800
 847
 848 #define RTMGRP_DECnet_IFADDR    0x1000
 849 #define RTMGRP_DECnet_ROUTE     0x4000
 850
 851 #define RTMGRP_IPV6_PREFIX      0x20000
 852 #endif
 853
 854 /* RTnetlink multicast groups */
 855 enum rtnetlink_groups {
 856         RTNLGRP_NONE,
 857 #define RTNLGRP_NONE            RTNLGRP_NONE
 858         RTNLGRP_LINK,
 859 #define RTNLGRP_LINK            RTNLGRP_LINK
 860         RTNLGRP_NOTIFY,
 861 #define RTNLGRP_NOTIFY          RTNLGRP_NOTIFY
 862         RTNLGRP_NEIGH,
 863 #define RTNLGRP_NEIGH           RTNLGRP_NEIGH
 864         RTNLGRP_TC,
 865 #define RTNLGRP_TC              RTNLGRP_TC
 866         RTNLGRP_IPV4_IFADDR,
 867 #define RTNLGRP_IPV4_IFADDR     RTNLGRP_IPV4_IFADDR
 868         RTNLGRP_IPV4_MROUTE,
 869 #define RTNLGRP_IPV4_MROUTE     RTNLGRP_IPV4_MROUTE
 870         RTNLGRP_IPV4_ROUTE,
 871 #define RTNLGRP_IPV4_ROUTE      RTNLGRP_IPV4_ROUTE
 872         RTNLGRP_NOP1,
 873         RTNLGRP_IPV6_IFADDR,
 874 #define RTNLGRP_IPV6_IFADDR     RTNLGRP_IPV6_IFADDR
 875         RTNLGRP_IPV6_MROUTE,
 876 #define RTNLGRP_IPV6_MROUTE     RTNLGRP_IPV6_MROUTE
 877         RTNLGRP_IPV6_ROUTE,
 878 #define RTNLGRP_IPV6_ROUTE      RTNLGRP_IPV6_ROUTE
 879         RTNLGRP_IPV6_IFINFO,
 880 #define RTNLGRP_IPV6_IFINFO     RTNLGRP_IPV6_IFINFO
 881         RTNLGRP_DECnet_IFADDR,
 882 #define RTNLGRP_DECnet_IFADDR   RTNLGRP_DECnet_IFADDR
 883         RTNLGRP_NOP2,
 884         RTNLGRP_DECnet_ROUTE,
 885 #define RTNLGRP_DECnet_ROUTE    RTNLGRP_DECnet_ROUTE
 886         RTNLGRP_NOP3,
 887         RTNLGRP_NOP4,
 888         RTNLGRP_IPV6_PREFIX,
 889 #define RTNLGRP_IPV6_PREFIX     RTNLGRP_IPV6_PREFIX
 890         __RTNLGRP_MAX
 891 };
 892 #define RTNLGRP_MAX     (__RTNLGRP_MAX - 1)
 893
 894 /* TC action piece */
 895 struct tcamsg
 896 {
 897         unsigned char   tca_family;
 898         unsigned char   tca__pad1;
 899         unsigned short  tca__pad2;
 900 };
 901 #define TA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
 902 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
 903 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
 904 #define TCAA_MAX 1
 905
 906 /* End of information exported to user level */
 907
 908 #ifdef __KERNEL__
 909
 910 #include <linux/config.h>
 911 #include <linux/mutex.h>
 912
 913 extern size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size);
 914 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
 915 {
 916         int len = strlen(str) + 1;
 917         return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
 918 }
 919
 920 extern int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len);
 921
 922 #define rtattr_parse_nested(tb, max, rta) \
 923         rtattr_parse((tb), (max), RTA_DATA((rta)), RTA_PAYLOAD((rta)))
 924
 925 extern struct sock *rtnl;
 926
 927 struct rtnetlink_link
 928 {
 929         int (*doit)(struct sk_buff *, struct nlmsghdr*, void *attr);
 930         int (*dumpit)(struct sk_buff *, struct netlink_callback *cb);
 931 };
 932
 933 extern struct rtnetlink_link * rtnetlink_links[NPROTO];
 934 extern int rtnetlink_send(struct sk_buff *skb, u32 pid, u32 group, int echo);
 935 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
 936
 937 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
 938
 939 #define RTA_PUT(skb, attrtype, attrlen, data) \
 940 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
 941                  goto rtattr_failure; \
 942         __rta_fill(skb, attrtype, attrlen, data); })
 943
 944 #define RTA_APPEND(skb, attrlen, data) \
 945 ({      if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
 946                 goto rtattr_failure; \
 947         memcpy(skb_put(skb, attrlen), data, attrlen); })
 948
 949 #define RTA_PUT_NOHDR(skb, attrlen, data) \
 950 ({      RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \
 951         memset(skb->tail - (RTA_ALIGN(attrlen) - attrlen), 0, \
 952                RTA_ALIGN(attrlen) - attrlen); })
 953
 954 #define RTA_PUT_U8(skb, attrtype, value) \
 955 ({      u8 _tmp = (value); \
 956         RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })
 957
 958 #define RTA_PUT_U16(skb, attrtype, value) \
 959 ({      u16 _tmp = (value); \
 960         RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })
 961
 962 #define RTA_PUT_U32(skb, attrtype, value) \
 963 ({      u32 _tmp = (value); \
 964         RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
 965
 966 #define RTA_PUT_U64(skb, attrtype, value) \
 967 ({      u64 _tmp = (value); \
 968         RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
 969
 970 #define RTA_PUT_SECS(skb, attrtype, value) \
 971         RTA_PUT_U64(skb, attrtype, (value) / HZ)
 972
 973 #define RTA_PUT_MSECS(skb, attrtype, value) \
 974         RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
 975
 976 #define RTA_PUT_STRING(skb, attrtype, value) \
 977         RTA_PUT(skb, attrtype, strlen(value) + 1, value)
 978
 979 #define RTA_PUT_FLAG(skb, attrtype) \
 980         RTA_PUT(skb, attrtype, 0, NULL);
 981
 982 #define RTA_NEST(skb, type) \
 983 ({      struct rtattr *__start = (struct rtattr *) (skb)->tail; \
 984         RTA_PUT(skb, type, 0, NULL); \
 985         __start;  })
 986
 987 #define RTA_NEST_END(skb, start) \
 988 ({      (start)->rta_len = ((skb)->tail - (unsigned char *) (start)); \
 989         (skb)->len; })
 990
 991 #define RTA_NEST_CANCEL(skb, start) \
 992 ({      if (start) \
 993                 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
 994         -1; })
 995
 996 #define RTA_GET_U8(rta) \
 997 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
 998                 goto rtattr_failure; \
 999         *(u8 *) RTA_DATA(rta); })
1000
1001 #define RTA_GET_U16(rta) \
1002 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
1003                 goto rtattr_failure; \
1004         *(u16 *) RTA_DATA(rta); })
1005
1006 #define RTA_GET_U32(rta) \
1007 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
1008                 goto rtattr_failure; \
1009         *(u32 *) RTA_DATA(rta); })
1010
1011 #define RTA_GET_U64(rta) \
1012 ({      u64 _tmp; \
1013         if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
1014                 goto rtattr_failure; \
1015         memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
1016         _tmp; })
1017
1018 #define RTA_GET_FLAG(rta) (!!(rta))
1019
1020 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
1021 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
1022
1023 static inline struct rtattr *
1024 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
1025 {
1026         struct rtattr *rta;
1027         int size = RTA_LENGTH(attrlen);
1028
1029         rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
1030         rta->rta_type = attrtype;
1031         rta->rta_len = size;
1032         memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
1033         return rta;
1034 }
1035
1036 #define __RTA_PUT(skb, attrtype, attrlen) \
1037 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
1038                 goto rtattr_failure; \
1039         __rta_reserve(skb, attrtype, attrlen); })
1040
1041 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
1042
1043 /* RTNL is used as a global lock for all changes to network configuration  */
1044 extern void rtnl_lock(void);
1045 extern void rtnl_unlock(void);
1046 extern int rtnl_trylock(void);
1047
1048 extern void rtnetlink_init(void);
1049 extern void __rtnl_unlock(void);
1050
1051 #define ASSERT_RTNL() do { \
1052         if (unlikely(rtnl_trylock())) { \
1053                 rtnl_unlock(); \
1054                 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
1055                        __FILE__,  __LINE__); \
1056                 dump_stack(); \
1057         } \
1058 } while(0)
1059
1060 #define BUG_TRAP(x) do { \
1061         if (unlikely(!(x))) { \
1062                 printk(KERN_ERR "KERNEL: assertion (%s) failed at %s (%d)\n", \
1063                         #x,  __FILE__ , __LINE__); \
1064         } \
1065 } while(0)
1066
1067 #endif /* __KERNEL__ */
1068
1069
1070 #endif  /* __LINUX_RTNETLINK_H */