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
 203 /* rtm_scope
 204
 205    Really it is not scope, but sort of distance to the destination.
 206    NOWHERE are reserved for not existing destinations, HOST is our
 207    local addresses, LINK are destinations, located on directly attached
 208    link and UNIVERSE is everywhere in the Universe.
 209
 210    Intermediate values are also possible f.e. interior routes
 211    could be assigned a value between UNIVERSE and LINK.
 212 */
 213
 214 enum rt_scope_t
 215 {
 216         RT_SCOPE_UNIVERSE=0,
 217 /* User defined values  */
 218         RT_SCOPE_SITE=200,
 219         RT_SCOPE_LINK=253,
 220         RT_SCOPE_HOST=254,
 221         RT_SCOPE_NOWHERE=255
 222 };
 223
 224 /* rtm_flags */
 225
 226 #define RTM_F_NOTIFY            0x100   /* Notify user of route change  */
 227 #define RTM_F_CLONED            0x200   /* This route is cloned         */
 228 #define RTM_F_EQUALIZE          0x400   /* Multipath equalizer: NI      */
 229 #define RTM_F_PREFIX            0x800   /* Prefix addresses             */
 230
 231 /* Reserved table identifiers */
 232
 233 enum rt_class_t
 234 {
 235         RT_TABLE_UNSPEC=0,
 236 /* User defined values */
 237         RT_TABLE_DEFAULT=253,
 238         RT_TABLE_MAIN=254,
 239         RT_TABLE_LOCAL=255,
 240         __RT_TABLE_MAX
 241 };
 242 #define RT_TABLE_MAX (__RT_TABLE_MAX - 1)
 243
 244
 245
 246 /* Routing message attributes */
 247
 248 enum rtattr_type_t
 249 {
 250         RTA_UNSPEC,
 251         RTA_DST,
 252         RTA_SRC,
 253         RTA_IIF,
 254         RTA_OIF,
 255         RTA_GATEWAY,
 256         RTA_PRIORITY,
 257         RTA_PREFSRC,
 258         RTA_METRICS,
 259         RTA_MULTIPATH,
 260         RTA_PROTOINFO,
 261         RTA_FLOW,
 262         RTA_CACHEINFO,
 263         RTA_SESSION,
 264         RTA_MP_ALGO,
 265         __RTA_MAX
 266 };
 267
 268 #define RTA_MAX (__RTA_MAX - 1)
 269
 270 #define RTM_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
 271 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
 272
 273 /* RTM_MULTIPATH --- array of struct rtnexthop.
 274  *
 275  * "struct rtnexthop" describes all necessary nexthop information,
 276  * i.e. parameters of path to a destination via this nexthop.
 277  *
 278  * At the moment it is impossible to set different prefsrc, mtu, window
 279  * and rtt for different paths from multipath.
 280  */
 281
 282 struct rtnexthop
 283 {
 284         unsigned short          rtnh_len;
 285         unsigned char           rtnh_flags;
 286         unsigned char           rtnh_hops;
 287         int                     rtnh_ifindex;
 288 };
 289
 290 /* rtnh_flags */
 291
 292 #define RTNH_F_DEAD             1       /* Nexthop is dead (used by multipath)  */
 293 #define RTNH_F_PERVASIVE        2       /* Do recursive gateway lookup  */
 294 #define RTNH_F_ONLINK           4       /* Gateway is forced on link    */
 295
 296 /* Macros to handle hexthops */
 297
 298 #define RTNH_ALIGNTO    4
 299 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) )
 300 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \
 301                            ((int)(rtnh)->rtnh_len) <= (len))
 302 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len)))
 303 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len))
 304 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len))
 305 #define RTNH_DATA(rtnh)   ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0)))
 306
 307 /* RTM_CACHEINFO */
 308
 309 struct rta_cacheinfo
 310 {
 311         __u32   rta_clntref;
 312         __u32   rta_lastuse;
 313         __s32   rta_expires;
 314         __u32   rta_error;
 315         __u32   rta_used;
 316
 317 #define RTNETLINK_HAVE_PEERINFO 1
 318         __u32   rta_id;
 319         __u32   rta_ts;
 320         __u32   rta_tsage;
 321 };
 322
 323 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
 324
 325 enum
 326 {
 327         RTAX_UNSPEC,
 328 #define RTAX_UNSPEC RTAX_UNSPEC
 329         RTAX_LOCK,
 330 #define RTAX_LOCK RTAX_LOCK
 331         RTAX_MTU,
 332 #define RTAX_MTU RTAX_MTU
 333         RTAX_WINDOW,
 334 #define RTAX_WINDOW RTAX_WINDOW
 335         RTAX_RTT,
 336 #define RTAX_RTT RTAX_RTT
 337         RTAX_RTTVAR,
 338 #define RTAX_RTTVAR RTAX_RTTVAR
 339         RTAX_SSTHRESH,
 340 #define RTAX_SSTHRESH RTAX_SSTHRESH
 341         RTAX_CWND,
 342 #define RTAX_CWND RTAX_CWND
 343         RTAX_ADVMSS,
 344 #define RTAX_ADVMSS RTAX_ADVMSS
 345         RTAX_REORDERING,
 346 #define RTAX_REORDERING RTAX_REORDERING
 347         RTAX_HOPLIMIT,
 348 #define RTAX_HOPLIMIT RTAX_HOPLIMIT
 349         RTAX_INITCWND,
 350 #define RTAX_INITCWND RTAX_INITCWND
 351         RTAX_FEATURES,
 352 #define RTAX_FEATURES RTAX_FEATURES
 353         __RTAX_MAX
 354 };
 355
 356 #define RTAX_MAX (__RTAX_MAX - 1)
 357
 358 #define RTAX_FEATURE_ECN        0x00000001
 359 #define RTAX_FEATURE_SACK       0x00000002
 360 #define RTAX_FEATURE_TIMESTAMP  0x00000004
 361 #define RTAX_FEATURE_ALLFRAG    0x00000008
 362
 363 struct rta_session
 364 {
 365         __u8    proto;
 366
 367         union {
 368                 struct {
 369                         __u16   sport;
 370                         __u16   dport;
 371                 } ports;
 372
 373                 struct {
 374                         __u8    type;
 375                         __u8    code;
 376                         __u16   ident;
 377                 } icmpt;
 378
 379                 __u32           spi;
 380         } u;
 381 };
 382
 383
 384 /*********************************************************
 385  *              Interface address.
 386  ****/
 387
 388 struct ifaddrmsg
 389 {
 390         unsigned char   ifa_family;
 391         unsigned char   ifa_prefixlen;  /* The prefix length            */
 392         unsigned char   ifa_flags;      /* Flags                        */
 393         unsigned char   ifa_scope;      /* See above                    */
 394         int             ifa_index;      /* Link index                   */
 395 };
 396
 397 enum
 398 {
 399         IFA_UNSPEC,
 400         IFA_ADDRESS,
 401         IFA_LOCAL,
 402         IFA_LABEL,
 403         IFA_BROADCAST,
 404         IFA_ANYCAST,
 405         IFA_CACHEINFO,
 406         IFA_MULTICAST,
 407         __IFA_MAX
 408 };
 409
 410 #define IFA_MAX (__IFA_MAX - 1)
 411
 412 /* ifa_flags */
 413
 414 #define IFA_F_SECONDARY         0x01
 415 #define IFA_F_TEMPORARY         IFA_F_SECONDARY
 416
 417 #define IFA_F_DEPRECATED        0x20
 418 #define IFA_F_TENTATIVE         0x40
 419 #define IFA_F_PERMANENT         0x80
 420
 421 struct ifa_cacheinfo
 422 {
 423         __u32   ifa_prefered;
 424         __u32   ifa_valid;
 425         __u32   cstamp; /* created timestamp, hundredths of seconds */
 426         __u32   tstamp; /* updated timestamp, hundredths of seconds */
 427 };
 428
 429
 430 #define IFA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
 431 #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
 432
 433 /*
 434    Important comment:
 435    IFA_ADDRESS is prefix address, rather than local interface address.
 436    It makes no difference for normally configured broadcast interfaces,
 437    but for point-to-point IFA_ADDRESS is DESTINATION address,
 438    local address is supplied in IFA_LOCAL attribute.
 439  */
 440
 441 /**************************************************************
 442  *              Neighbour discovery.
 443  ****/
 444
 445 struct ndmsg
 446 {
 447         unsigned char   ndm_family;
 448         unsigned char   ndm_pad1;
 449         unsigned short  ndm_pad2;
 450         int             ndm_ifindex;    /* Link index                   */
 451         __u16           ndm_state;
 452         __u8            ndm_flags;
 453         __u8            ndm_type;
 454 };
 455
 456 enum
 457 {
 458         NDA_UNSPEC,
 459         NDA_DST,
 460         NDA_LLADDR,
 461         NDA_CACHEINFO,
 462         NDA_PROBES,
 463         __NDA_MAX
 464 };
 465
 466 #define NDA_MAX (__NDA_MAX - 1)
 467
 468 #define NDA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
 469 #define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
 470
 471 /*
 472  *      Neighbor Cache Entry Flags
 473  */
 474
 475 #define NTF_PROXY       0x08    /* == ATF_PUBL */
 476 #define NTF_ROUTER      0x80
 477
 478 /*
 479  *      Neighbor Cache Entry States.
 480  */
 481
 482 #define NUD_INCOMPLETE  0x01
 483 #define NUD_REACHABLE   0x02
 484 #define NUD_STALE       0x04
 485 #define NUD_DELAY       0x08
 486 #define NUD_PROBE       0x10
 487 #define NUD_FAILED      0x20
 488
 489 /* Dummy states */
 490 #define NUD_NOARP       0x40
 491 #define NUD_PERMANENT   0x80
 492 #define NUD_NONE        0x00
 493
 494
 495 struct nda_cacheinfo
 496 {
 497         __u32           ndm_confirmed;
 498         __u32           ndm_used;
 499         __u32           ndm_updated;
 500         __u32           ndm_refcnt;
 501 };
 502
 503
 504 /*****************************************************************
 505  *              Neighbour tables specific messages.
 506  *
 507  * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the
 508  * NLM_F_DUMP flag set. Every neighbour table configuration is
 509  * spread over multiple messages to avoid running into message
 510  * size limits on systems with many interfaces. The first message
 511  * in the sequence transports all not device specific data such as
 512  * statistics, configuration, and the default parameter set.
 513  * This message is followed by 0..n messages carrying device
 514  * specific parameter sets.
 515  * Although the ordering should be sufficient, NDTA_NAME can be
 516  * used to identify sequences. The initial message can be identified
 517  * by checking for NDTA_CONFIG. The device specific messages do
 518  * not contain this TLV but have NDTPA_IFINDEX set to the
 519  * corresponding interface index.
 520  *
 521  * To change neighbour table attributes, send RTM_SETNEIGHTBL
 522  * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3],
 523  * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked
 524  * otherwise. Device specific parameter sets can be changed by
 525  * setting NDTPA_IFINDEX to the interface index of the corresponding
 526  * device.
 527  ****/
 528
 529 struct ndt_stats
 530 {
 531         __u64           ndts_allocs;
 532         __u64           ndts_destroys;
 533         __u64           ndts_hash_grows;
 534         __u64           ndts_res_failed;
 535         __u64           ndts_lookups;
 536         __u64           ndts_hits;
 537         __u64           ndts_rcv_probes_mcast;
 538         __u64           ndts_rcv_probes_ucast;
 539         __u64           ndts_periodic_gc_runs;
 540         __u64           ndts_forced_gc_runs;
 541 };
 542
 543 enum {
 544         NDTPA_UNSPEC,
 545         NDTPA_IFINDEX,                  /* u32, unchangeable */
 546         NDTPA_REFCNT,                   /* u32, read-only */
 547         NDTPA_REACHABLE_TIME,           /* u64, read-only, msecs */
 548         NDTPA_BASE_REACHABLE_TIME,      /* u64, msecs */
 549         NDTPA_RETRANS_TIME,             /* u64, msecs */
 550         NDTPA_GC_STALETIME,             /* u64, msecs */
 551         NDTPA_DELAY_PROBE_TIME,         /* u64, msecs */
 552         NDTPA_QUEUE_LEN,                /* u32 */
 553         NDTPA_APP_PROBES,               /* u32 */
 554         NDTPA_UCAST_PROBES,             /* u32 */
 555         NDTPA_MCAST_PROBES,             /* u32 */
 556         NDTPA_ANYCAST_DELAY,            /* u64, msecs */
 557         NDTPA_PROXY_DELAY,              /* u64, msecs */
 558         NDTPA_PROXY_QLEN,               /* u32 */
 559         NDTPA_LOCKTIME,                 /* u64, msecs */
 560         __NDTPA_MAX
 561 };
 562 #define NDTPA_MAX (__NDTPA_MAX - 1)
 563
 564 struct ndtmsg
 565 {
 566         __u8            ndtm_family;
 567         __u8            ndtm_pad1;
 568         __u16           ndtm_pad2;
 569 };
 570
 571 struct ndt_config
 572 {
 573         __u16           ndtc_key_len;
 574         __u16           ndtc_entry_size;
 575         __u32           ndtc_entries;
 576         __u32           ndtc_last_flush;        /* delta to now in msecs */
 577         __u32           ndtc_last_rand;         /* delta to now in msecs */
 578         __u32           ndtc_hash_rnd;
 579         __u32           ndtc_hash_mask;
 580         __u32           ndtc_hash_chain_gc;
 581         __u32           ndtc_proxy_qlen;
 582 };
 583
 584 enum {
 585         NDTA_UNSPEC,
 586         NDTA_NAME,                      /* char *, unchangeable */
 587         NDTA_THRESH1,                   /* u32 */
 588         NDTA_THRESH2,                   /* u32 */
 589         NDTA_THRESH3,                   /* u32 */
 590         NDTA_CONFIG,                    /* struct ndt_config, read-only */
 591         NDTA_PARMS,                     /* nested TLV NDTPA_* */
 592         NDTA_STATS,                     /* struct ndt_stats, read-only */
 593         NDTA_GC_INTERVAL,               /* u64, msecs */
 594         __NDTA_MAX
 595 };
 596 #define NDTA_MAX (__NDTA_MAX - 1)
 597
 598 #define NDTA_RTA(r) ((struct rtattr*)(((char*)(r)) + \
 599                      NLMSG_ALIGN(sizeof(struct ndtmsg))))
 600 #define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndtmsg))
 601
 602
 603 /****
 604  *              General form of address family dependent message.
 605  ****/
 606
 607 struct rtgenmsg
 608 {
 609         unsigned char           rtgen_family;
 610 };
 611
 612 /*****************************************************************
 613  *              Link layer specific messages.
 614  ****/
 615
 616 /* struct ifinfomsg
 617  * passes link level specific information, not dependent
 618  * on network protocol.
 619  */
 620
 621 struct ifinfomsg
 622 {
 623         unsigned char   ifi_family;
 624         unsigned char   __ifi_pad;
 625         unsigned short  ifi_type;               /* ARPHRD_* */
 626         int             ifi_index;              /* Link index   */
 627         unsigned        ifi_flags;              /* IFF_* flags  */
 628         unsigned        ifi_change;             /* IFF_* change mask */
 629 };
 630
 631 /********************************************************************
 632  *              prefix information
 633  ****/
 634
 635 struct prefixmsg
 636 {
 637         unsigned char   prefix_family;
 638         int             prefix_ifindex;
 639         unsigned char   prefix_type;
 640         unsigned char   prefix_len;
 641         unsigned char   prefix_flags;
 642 };
 643
 644 enum
 645 {
 646         PREFIX_UNSPEC,
 647         PREFIX_ADDRESS,
 648         PREFIX_CACHEINFO,
 649         __PREFIX_MAX
 650 };
 651
 652 #define PREFIX_MAX      (__PREFIX_MAX - 1)
 653
 654 struct prefix_cacheinfo
 655 {
 656         __u32   preferred_time;
 657         __u32   valid_time;
 658 };
 659
 660 /* The struct should be in sync with struct net_device_stats */
 661 struct rtnl_link_stats
 662 {
 663         __u32   rx_packets;             /* total packets received       */
 664         __u32   tx_packets;             /* total packets transmitted    */
 665         __u32   rx_bytes;               /* total bytes received         */
 666         __u32   tx_bytes;               /* total bytes transmitted      */
 667         __u32   rx_errors;              /* bad packets received         */
 668         __u32   tx_errors;              /* packet transmit problems     */
 669         __u32   rx_dropped;             /* no space in linux buffers    */
 670         __u32   tx_dropped;             /* no space available in linux  */
 671         __u32   multicast;              /* multicast packets received   */
 672         __u32   collisions;
 673
 674         /* detailed rx_errors: */
 675         __u32   rx_length_errors;
 676         __u32   rx_over_errors;         /* receiver ring buff overflow  */
 677         __u32   rx_crc_errors;          /* recved pkt with crc error    */
 678         __u32   rx_frame_errors;        /* recv'd frame alignment error */
 679         __u32   rx_fifo_errors;         /* recv'r fifo overrun          */
 680         __u32   rx_missed_errors;       /* receiver missed packet       */
 681
 682         /* detailed tx_errors */
 683         __u32   tx_aborted_errors;
 684         __u32   tx_carrier_errors;
 685         __u32   tx_fifo_errors;
 686         __u32   tx_heartbeat_errors;
 687         __u32   tx_window_errors;
 688
 689         /* for cslip etc */
 690         __u32   rx_compressed;
 691         __u32   tx_compressed;
 692 };
 693
 694 /* The struct should be in sync with struct ifmap */
 695 struct rtnl_link_ifmap
 696 {
 697         __u64   mem_start;
 698         __u64   mem_end;
 699         __u64   base_addr;
 700         __u16   irq;
 701         __u8    dma;
 702         __u8    port;
 703 };
 704
 705 enum
 706 {
 707         IFLA_UNSPEC,
 708         IFLA_ADDRESS,
 709         IFLA_BROADCAST,
 710         IFLA_IFNAME,
 711         IFLA_MTU,
 712         IFLA_LINK,
 713         IFLA_QDISC,
 714         IFLA_STATS,
 715         IFLA_COST,
 716 #define IFLA_COST IFLA_COST
 717         IFLA_PRIORITY,
 718 #define IFLA_PRIORITY IFLA_PRIORITY
 719         IFLA_MASTER,
 720 #define IFLA_MASTER IFLA_MASTER
 721         IFLA_WIRELESS,          /* Wireless Extension event - see wireless.h */
 722 #define IFLA_WIRELESS IFLA_WIRELESS
 723         IFLA_PROTINFO,          /* Protocol specific information for a link */
 724 #define IFLA_PROTINFO IFLA_PROTINFO
 725         IFLA_TXQLEN,
 726 #define IFLA_TXQLEN IFLA_TXQLEN
 727         IFLA_MAP,
 728 #define IFLA_MAP IFLA_MAP
 729         IFLA_WEIGHT,
 730 #define IFLA_WEIGHT IFLA_WEIGHT
 731         __IFLA_MAX
 732 };
 733
 734
 735 #define IFLA_MAX (__IFLA_MAX - 1)
 736
 737 #define IFLA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
 738 #define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
 739
 740 /* ifi_flags.
 741
 742    IFF_* flags.
 743
 744    The only change is:
 745    IFF_LOOPBACK, IFF_BROADCAST and IFF_POINTOPOINT are
 746    more not changeable by user. They describe link media
 747    characteristics and set by device driver.
 748
 749    Comments:
 750    - Combination IFF_BROADCAST|IFF_POINTOPOINT is invalid
 751    - If neither of these three flags are set;
 752      the interface is NBMA.
 753
 754    - IFF_MULTICAST does not mean anything special:
 755    multicasts can be used on all not-NBMA links.
 756    IFF_MULTICAST means that this media uses special encapsulation
 757    for multicast frames. Apparently, all IFF_POINTOPOINT and
 758    IFF_BROADCAST devices are able to use multicasts too.
 759  */
 760
 761 /* IFLA_LINK.
 762    For usual devices it is equal ifi_index.
 763    If it is a "virtual interface" (f.e. tunnel), ifi_link
 764    can point to real physical interface (f.e. for bandwidth calculations),
 765    or maybe 0, what means, that real media is unknown (usual
 766    for IPIP tunnels, when route to endpoint is allowed to change)
 767  */
 768
 769 /* Subtype attributes for IFLA_PROTINFO */
 770 enum
 771 {
 772         IFLA_INET6_UNSPEC,
 773         IFLA_INET6_FLAGS,       /* link flags                   */
 774         IFLA_INET6_CONF,        /* sysctl parameters            */
 775         IFLA_INET6_STATS,       /* statistics                   */
 776         IFLA_INET6_MCAST,       /* MC things. What of them?     */
 777         IFLA_INET6_CACHEINFO,   /* time values and max reasm size */
 778         __IFLA_INET6_MAX
 779 };
 780
 781 #define IFLA_INET6_MAX  (__IFLA_INET6_MAX - 1)
 782
 783 struct ifla_cacheinfo
 784 {
 785         __u32   max_reasm_len;
 786         __u32   tstamp;         /* ipv6InterfaceTable updated timestamp */
 787         __u32   reachable_time;
 788         __u32   retrans_time;
 789 };
 790
 791 /*****************************************************************
 792  *              Traffic control messages.
 793  ****/
 794
 795 struct tcmsg
 796 {
 797         unsigned char   tcm_family;
 798         unsigned char   tcm__pad1;
 799         unsigned short  tcm__pad2;
 800         int             tcm_ifindex;
 801         __u32           tcm_handle;
 802         __u32           tcm_parent;
 803         __u32           tcm_info;
 804 };
 805
 806 enum
 807 {
 808         TCA_UNSPEC,
 809         TCA_KIND,
 810         TCA_OPTIONS,
 811         TCA_STATS,
 812         TCA_XSTATS,
 813         TCA_RATE,
 814         TCA_FCNT,
 815         TCA_STATS2,
 816         __TCA_MAX
 817 };
 818
 819 #define TCA_MAX (__TCA_MAX - 1)
 820
 821 #define TCA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
 822 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
 823
 824
 825 /* RTnetlink multicast groups */
 826
 827 #define RTMGRP_LINK             1
 828 #define RTMGRP_NOTIFY           2
 829 #define RTMGRP_NEIGH            4
 830 #define RTMGRP_TC               8
 831
 832 #define RTMGRP_IPV4_IFADDR      0x10
 833 #define RTMGRP_IPV4_MROUTE      0x20
 834 #define RTMGRP_IPV4_ROUTE       0x40
 835
 836 #define RTMGRP_IPV6_IFADDR      0x100
 837 #define RTMGRP_IPV6_MROUTE      0x200
 838 #define RTMGRP_IPV6_ROUTE       0x400
 839 #define RTMGRP_IPV6_IFINFO      0x800
 840
 841 #define RTMGRP_DECnet_IFADDR    0x1000
 842 #define RTMGRP_DECnet_ROUTE     0x4000
 843
 844 #define RTMGRP_IPV6_PREFIX      0x20000
 845
 846 /* TC action piece */
 847 struct tcamsg
 848 {
 849         unsigned char   tca_family;
 850         unsigned char   tca__pad1;
 851         unsigned short  tca__pad2;
 852 };
 853 #define TA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
 854 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
 855 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
 856 #define TCAA_MAX 1
 857
 858 /* End of information exported to user level */
 859
 860 #ifdef __KERNEL__
 861
 862 #include <linux/config.h>
 863
 864 extern size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size);
 865 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
 866 {
 867         int len = strlen(str) + 1;
 868         return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
 869 }
 870
 871 extern int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len);
 872
 873 #define rtattr_parse_nested(tb, max, rta) \
 874         rtattr_parse((tb), (max), RTA_DATA((rta)), RTA_PAYLOAD((rta)))
 875
 876 extern struct sock *rtnl;
 877
 878 struct rtnetlink_link
 879 {
 880         int (*doit)(struct sk_buff *, struct nlmsghdr*, void *attr);
 881         int (*dumpit)(struct sk_buff *, struct netlink_callback *cb);
 882 };
 883
 884 extern struct rtnetlink_link * rtnetlink_links[NPROTO];
 885 extern int rtnetlink_send(struct sk_buff *skb, u32 pid, u32 group, int echo);
 886 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
 887
 888 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
 889
 890 #define RTA_PUT(skb, attrtype, attrlen, data) \
 891 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
 892                  goto rtattr_failure; \
 893         __rta_fill(skb, attrtype, attrlen, data); })
 894
 895 #define RTA_PUT_NOHDR(skb, attrlen, data) \
 896 ({      if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
 897                 goto rtattr_failure; \
 898         memcpy(skb_put(skb, RTA_ALIGN(attrlen)), data, attrlen); })
 899
 900 #define RTA_PUT_U8(skb, attrtype, value) \
 901 ({      u8 _tmp = (value); \
 902         RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })
 903
 904 #define RTA_PUT_U16(skb, attrtype, value) \
 905 ({      u16 _tmp = (value); \
 906         RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })
 907
 908 #define RTA_PUT_U32(skb, attrtype, value) \
 909 ({      u32 _tmp = (value); \
 910         RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
 911
 912 #define RTA_PUT_U64(skb, attrtype, value) \
 913 ({      u64 _tmp = (value); \
 914         RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
 915
 916 #define RTA_PUT_SECS(skb, attrtype, value) \
 917         RTA_PUT_U64(skb, attrtype, (value) / HZ)
 918
 919 #define RTA_PUT_MSECS(skb, attrtype, value) \
 920         RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
 921
 922 #define RTA_PUT_STRING(skb, attrtype, value) \
 923         RTA_PUT(skb, attrtype, strlen(value) + 1, value)
 924
 925 #define RTA_PUT_FLAG(skb, attrtype) \
 926         RTA_PUT(skb, attrtype, 0, NULL);
 927
 928 #define RTA_NEST(skb, type) \
 929 ({      struct rtattr *__start = (struct rtattr *) (skb)->tail; \
 930         RTA_PUT(skb, type, 0, NULL); \
 931         __start;  })
 932
 933 #define RTA_NEST_END(skb, start) \
 934 ({      (start)->rta_len = ((skb)->tail - (unsigned char *) (start)); \
 935         (skb)->len; })
 936
 937 #define RTA_NEST_CANCEL(skb, start) \
 938 ({      if (start) \
 939                 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
 940         -1; })
 941
 942 #define RTA_GET_U8(rta) \
 943 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
 944                 goto rtattr_failure; \
 945         *(u8 *) RTA_DATA(rta); })
 946
 947 #define RTA_GET_U16(rta) \
 948 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
 949                 goto rtattr_failure; \
 950         *(u16 *) RTA_DATA(rta); })
 951
 952 #define RTA_GET_U32(rta) \
 953 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
 954                 goto rtattr_failure; \
 955         *(u32 *) RTA_DATA(rta); })
 956
 957 #define RTA_GET_U64(rta) \
 958 ({      u64 _tmp; \
 959         if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
 960                 goto rtattr_failure; \
 961         memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
 962         _tmp; })
 963
 964 #define RTA_GET_FLAG(rta) (!!(rta))
 965
 966 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
 967 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
 968
 969 static inline struct rtattr *
 970 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
 971 {
 972         struct rtattr *rta;
 973         int size = RTA_LENGTH(attrlen);
 974
 975         rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
 976         rta->rta_type = attrtype;
 977         rta->rta_len = size;
 978         return rta;
 979 }
 980
 981 #define __RTA_PUT(skb, attrtype, attrlen) \
 982 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
 983                 goto rtattr_failure; \
 984         __rta_reserve(skb, attrtype, attrlen); })
 985
 986 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
 987
 988 extern struct semaphore rtnl_sem;
 989
 990 #define rtnl_shlock()           down(&rtnl_sem)
 991 #define rtnl_shlock_nowait()    down_trylock(&rtnl_sem)
 992
 993 #define rtnl_shunlock() do { up(&rtnl_sem); \
 994                              if (rtnl && rtnl->sk_receive_queue.qlen) \
 995                                      rtnl->sk_data_ready(rtnl, 0); \
 996                         } while(0)
 997
 998 extern void rtnl_lock(void);
 999 extern int rtnl_lock_interruptible(void);
1000 extern void rtnl_unlock(void);
1001 extern void rtnetlink_init(void);
1002
1003 #define ASSERT_RTNL() do { \
1004         if (unlikely(down_trylock(&rtnl_sem) == 0)) { \
1005                 up(&rtnl_sem); \
1006                 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
1007                        __FILE__,  __LINE__); \
1008                 dump_stack(); \
1009         } \
1010 } while(0)
1011
1012 #define BUG_TRAP(x) do { \
1013         if (unlikely(!(x))) { \
1014                 printk(KERN_ERR "KERNEL: assertion (%s) failed at %s (%d)\n", \
1015                         #x,  __FILE__ , __LINE__); \
1016         } \
1017 } while(0)
1018
1019 #endif /* __KERNEL__ */
1020
1021
1022 #endif  /* __LINUX_RTNETLINK_H */