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         __u8    pad1;
 367         __u16   pad2;
 368
 369         union {
 370                 struct {
 371                         __u16   sport;
 372                         __u16   dport;
 373                 } ports;
 374
 375                 struct {
 376                         __u8    type;
 377                         __u8    code;
 378                         __u16   ident;
 379                 } icmpt;
 380
 381                 __u32           spi;
 382         } u;
 383 };
 384
 385
 386 /*********************************************************
 387  *              Interface address.
 388  ****/
 389
 390 struct ifaddrmsg
 391 {
 392         unsigned char   ifa_family;
 393         unsigned char   ifa_prefixlen;  /* The prefix length            */
 394         unsigned char   ifa_flags;      /* Flags                        */
 395         unsigned char   ifa_scope;      /* See above                    */
 396         int             ifa_index;      /* Link index                   */
 397 };
 398
 399 enum
 400 {
 401         IFA_UNSPEC,
 402         IFA_ADDRESS,
 403         IFA_LOCAL,
 404         IFA_LABEL,
 405         IFA_BROADCAST,
 406         IFA_ANYCAST,
 407         IFA_CACHEINFO,
 408         IFA_MULTICAST,
 409         __IFA_MAX
 410 };
 411
 412 #define IFA_MAX (__IFA_MAX - 1)
 413
 414 /* ifa_flags */
 415
 416 #define IFA_F_SECONDARY         0x01
 417 #define IFA_F_TEMPORARY         IFA_F_SECONDARY
 418
 419 #define IFA_F_DEPRECATED        0x20
 420 #define IFA_F_TENTATIVE         0x40
 421 #define IFA_F_PERMANENT         0x80
 422
 423 struct ifa_cacheinfo
 424 {
 425         __u32   ifa_prefered;
 426         __u32   ifa_valid;
 427         __u32   cstamp; /* created timestamp, hundredths of seconds */
 428         __u32   tstamp; /* updated timestamp, hundredths of seconds */
 429 };
 430
 431
 432 #define IFA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
 433 #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
 434
 435 /*
 436    Important comment:
 437    IFA_ADDRESS is prefix address, rather than local interface address.
 438    It makes no difference for normally configured broadcast interfaces,
 439    but for point-to-point IFA_ADDRESS is DESTINATION address,
 440    local address is supplied in IFA_LOCAL attribute.
 441  */
 442
 443 /**************************************************************
 444  *              Neighbour discovery.
 445  ****/
 446
 447 struct ndmsg
 448 {
 449         unsigned char   ndm_family;
 450         unsigned char   ndm_pad1;
 451         unsigned short  ndm_pad2;
 452         int             ndm_ifindex;    /* Link index                   */
 453         __u16           ndm_state;
 454         __u8            ndm_flags;
 455         __u8            ndm_type;
 456 };
 457
 458 enum
 459 {
 460         NDA_UNSPEC,
 461         NDA_DST,
 462         NDA_LLADDR,
 463         NDA_CACHEINFO,
 464         NDA_PROBES,
 465         __NDA_MAX
 466 };
 467
 468 #define NDA_MAX (__NDA_MAX - 1)
 469
 470 #define NDA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
 471 #define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
 472
 473 /*
 474  *      Neighbor Cache Entry Flags
 475  */
 476
 477 #define NTF_PROXY       0x08    /* == ATF_PUBL */
 478 #define NTF_ROUTER      0x80
 479
 480 /*
 481  *      Neighbor Cache Entry States.
 482  */
 483
 484 #define NUD_INCOMPLETE  0x01
 485 #define NUD_REACHABLE   0x02
 486 #define NUD_STALE       0x04
 487 #define NUD_DELAY       0x08
 488 #define NUD_PROBE       0x10
 489 #define NUD_FAILED      0x20
 490
 491 /* Dummy states */
 492 #define NUD_NOARP       0x40
 493 #define NUD_PERMANENT   0x80
 494 #define NUD_NONE        0x00
 495
 496
 497 struct nda_cacheinfo
 498 {
 499         __u32           ndm_confirmed;
 500         __u32           ndm_used;
 501         __u32           ndm_updated;
 502         __u32           ndm_refcnt;
 503 };
 504
 505
 506 /*****************************************************************
 507  *              Neighbour tables specific messages.
 508  *
 509  * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the
 510  * NLM_F_DUMP flag set. Every neighbour table configuration is
 511  * spread over multiple messages to avoid running into message
 512  * size limits on systems with many interfaces. The first message
 513  * in the sequence transports all not device specific data such as
 514  * statistics, configuration, and the default parameter set.
 515  * This message is followed by 0..n messages carrying device
 516  * specific parameter sets.
 517  * Although the ordering should be sufficient, NDTA_NAME can be
 518  * used to identify sequences. The initial message can be identified
 519  * by checking for NDTA_CONFIG. The device specific messages do
 520  * not contain this TLV but have NDTPA_IFINDEX set to the
 521  * corresponding interface index.
 522  *
 523  * To change neighbour table attributes, send RTM_SETNEIGHTBL
 524  * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3],
 525  * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked
 526  * otherwise. Device specific parameter sets can be changed by
 527  * setting NDTPA_IFINDEX to the interface index of the corresponding
 528  * device.
 529  ****/
 530
 531 struct ndt_stats
 532 {
 533         __u64           ndts_allocs;
 534         __u64           ndts_destroys;
 535         __u64           ndts_hash_grows;
 536         __u64           ndts_res_failed;
 537         __u64           ndts_lookups;
 538         __u64           ndts_hits;
 539         __u64           ndts_rcv_probes_mcast;
 540         __u64           ndts_rcv_probes_ucast;
 541         __u64           ndts_periodic_gc_runs;
 542         __u64           ndts_forced_gc_runs;
 543 };
 544
 545 enum {
 546         NDTPA_UNSPEC,
 547         NDTPA_IFINDEX,                  /* u32, unchangeable */
 548         NDTPA_REFCNT,                   /* u32, read-only */
 549         NDTPA_REACHABLE_TIME,           /* u64, read-only, msecs */
 550         NDTPA_BASE_REACHABLE_TIME,      /* u64, msecs */
 551         NDTPA_RETRANS_TIME,             /* u64, msecs */
 552         NDTPA_GC_STALETIME,             /* u64, msecs */
 553         NDTPA_DELAY_PROBE_TIME,         /* u64, msecs */
 554         NDTPA_QUEUE_LEN,                /* u32 */
 555         NDTPA_APP_PROBES,               /* u32 */
 556         NDTPA_UCAST_PROBES,             /* u32 */
 557         NDTPA_MCAST_PROBES,             /* u32 */
 558         NDTPA_ANYCAST_DELAY,            /* u64, msecs */
 559         NDTPA_PROXY_DELAY,              /* u64, msecs */
 560         NDTPA_PROXY_QLEN,               /* u32 */
 561         NDTPA_LOCKTIME,                 /* u64, msecs */
 562         __NDTPA_MAX
 563 };
 564 #define NDTPA_MAX (__NDTPA_MAX - 1)
 565
 566 struct ndtmsg
 567 {
 568         __u8            ndtm_family;
 569         __u8            ndtm_pad1;
 570         __u16           ndtm_pad2;
 571 };
 572
 573 struct ndt_config
 574 {
 575         __u16           ndtc_key_len;
 576         __u16           ndtc_entry_size;
 577         __u32           ndtc_entries;
 578         __u32           ndtc_last_flush;        /* delta to now in msecs */
 579         __u32           ndtc_last_rand;         /* delta to now in msecs */
 580         __u32           ndtc_hash_rnd;
 581         __u32           ndtc_hash_mask;
 582         __u32           ndtc_hash_chain_gc;
 583         __u32           ndtc_proxy_qlen;
 584 };
 585
 586 enum {
 587         NDTA_UNSPEC,
 588         NDTA_NAME,                      /* char *, unchangeable */
 589         NDTA_THRESH1,                   /* u32 */
 590         NDTA_THRESH2,                   /* u32 */
 591         NDTA_THRESH3,                   /* u32 */
 592         NDTA_CONFIG,                    /* struct ndt_config, read-only */
 593         NDTA_PARMS,                     /* nested TLV NDTPA_* */
 594         NDTA_STATS,                     /* struct ndt_stats, read-only */
 595         NDTA_GC_INTERVAL,               /* u64, msecs */
 596         __NDTA_MAX
 597 };
 598 #define NDTA_MAX (__NDTA_MAX - 1)
 599
 600 #define NDTA_RTA(r) ((struct rtattr*)(((char*)(r)) + \
 601                      NLMSG_ALIGN(sizeof(struct ndtmsg))))
 602 #define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndtmsg))
 603
 604
 605 /****
 606  *              General form of address family dependent message.
 607  ****/
 608
 609 struct rtgenmsg
 610 {
 611         unsigned char           rtgen_family;
 612 };
 613
 614 /*****************************************************************
 615  *              Link layer specific messages.
 616  ****/
 617
 618 /* struct ifinfomsg
 619  * passes link level specific information, not dependent
 620  * on network protocol.
 621  */
 622
 623 struct ifinfomsg
 624 {
 625         unsigned char   ifi_family;
 626         unsigned char   __ifi_pad;
 627         unsigned short  ifi_type;               /* ARPHRD_* */
 628         int             ifi_index;              /* Link index   */
 629         unsigned        ifi_flags;              /* IFF_* flags  */
 630         unsigned        ifi_change;             /* IFF_* change mask */
 631 };
 632
 633 /********************************************************************
 634  *              prefix information
 635  ****/
 636
 637 struct prefixmsg
 638 {
 639         unsigned char   prefix_family;
 640         unsigned char   prefix_pad1;
 641         unsigned short  prefix_pad2;
 642         int             prefix_ifindex;
 643         unsigned char   prefix_type;
 644         unsigned char   prefix_len;
 645         unsigned char   prefix_flags;
 646         unsigned char   prefix_pad3;
 647 };
 648
 649 enum
 650 {
 651         PREFIX_UNSPEC,
 652         PREFIX_ADDRESS,
 653         PREFIX_CACHEINFO,
 654         __PREFIX_MAX
 655 };
 656
 657 #define PREFIX_MAX      (__PREFIX_MAX - 1)
 658
 659 struct prefix_cacheinfo
 660 {
 661         __u32   preferred_time;
 662         __u32   valid_time;
 663 };
 664
 665 /* The struct should be in sync with struct net_device_stats */
 666 struct rtnl_link_stats
 667 {
 668         __u32   rx_packets;             /* total packets received       */
 669         __u32   tx_packets;             /* total packets transmitted    */
 670         __u32   rx_bytes;               /* total bytes received         */
 671         __u32   tx_bytes;               /* total bytes transmitted      */
 672         __u32   rx_errors;              /* bad packets received         */
 673         __u32   tx_errors;              /* packet transmit problems     */
 674         __u32   rx_dropped;             /* no space in linux buffers    */
 675         __u32   tx_dropped;             /* no space available in linux  */
 676         __u32   multicast;              /* multicast packets received   */
 677         __u32   collisions;
 678
 679         /* detailed rx_errors: */
 680         __u32   rx_length_errors;
 681         __u32   rx_over_errors;         /* receiver ring buff overflow  */
 682         __u32   rx_crc_errors;          /* recved pkt with crc error    */
 683         __u32   rx_frame_errors;        /* recv'd frame alignment error */
 684         __u32   rx_fifo_errors;         /* recv'r fifo overrun          */
 685         __u32   rx_missed_errors;       /* receiver missed packet       */
 686
 687         /* detailed tx_errors */
 688         __u32   tx_aborted_errors;
 689         __u32   tx_carrier_errors;
 690         __u32   tx_fifo_errors;
 691         __u32   tx_heartbeat_errors;
 692         __u32   tx_window_errors;
 693
 694         /* for cslip etc */
 695         __u32   rx_compressed;
 696         __u32   tx_compressed;
 697 };
 698
 699 /* The struct should be in sync with struct ifmap */
 700 struct rtnl_link_ifmap
 701 {
 702         __u64   mem_start;
 703         __u64   mem_end;
 704         __u64   base_addr;
 705         __u16   irq;
 706         __u8    dma;
 707         __u8    port;
 708 };
 709
 710 enum
 711 {
 712         IFLA_UNSPEC,
 713         IFLA_ADDRESS,
 714         IFLA_BROADCAST,
 715         IFLA_IFNAME,
 716         IFLA_MTU,
 717         IFLA_LINK,
 718         IFLA_QDISC,
 719         IFLA_STATS,
 720         IFLA_COST,
 721 #define IFLA_COST IFLA_COST
 722         IFLA_PRIORITY,
 723 #define IFLA_PRIORITY IFLA_PRIORITY
 724         IFLA_MASTER,
 725 #define IFLA_MASTER IFLA_MASTER
 726         IFLA_WIRELESS,          /* Wireless Extension event - see wireless.h */
 727 #define IFLA_WIRELESS IFLA_WIRELESS
 728         IFLA_PROTINFO,          /* Protocol specific information for a link */
 729 #define IFLA_PROTINFO IFLA_PROTINFO
 730         IFLA_TXQLEN,
 731 #define IFLA_TXQLEN IFLA_TXQLEN
 732         IFLA_MAP,
 733 #define IFLA_MAP IFLA_MAP
 734         IFLA_WEIGHT,
 735 #define IFLA_WEIGHT IFLA_WEIGHT
 736         __IFLA_MAX
 737 };
 738
 739
 740 #define IFLA_MAX (__IFLA_MAX - 1)
 741
 742 #define IFLA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
 743 #define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
 744
 745 /* ifi_flags.
 746
 747    IFF_* flags.
 748
 749    The only change is:
 750    IFF_LOOPBACK, IFF_BROADCAST and IFF_POINTOPOINT are
 751    more not changeable by user. They describe link media
 752    characteristics and set by device driver.
 753
 754    Comments:
 755    - Combination IFF_BROADCAST|IFF_POINTOPOINT is invalid
 756    - If neither of these three flags are set;
 757      the interface is NBMA.
 758
 759    - IFF_MULTICAST does not mean anything special:
 760    multicasts can be used on all not-NBMA links.
 761    IFF_MULTICAST means that this media uses special encapsulation
 762    for multicast frames. Apparently, all IFF_POINTOPOINT and
 763    IFF_BROADCAST devices are able to use multicasts too.
 764  */
 765
 766 /* IFLA_LINK.
 767    For usual devices it is equal ifi_index.
 768    If it is a "virtual interface" (f.e. tunnel), ifi_link
 769    can point to real physical interface (f.e. for bandwidth calculations),
 770    or maybe 0, what means, that real media is unknown (usual
 771    for IPIP tunnels, when route to endpoint is allowed to change)
 772  */
 773
 774 /* Subtype attributes for IFLA_PROTINFO */
 775 enum
 776 {
 777         IFLA_INET6_UNSPEC,
 778         IFLA_INET6_FLAGS,       /* link flags                   */
 779         IFLA_INET6_CONF,        /* sysctl parameters            */
 780         IFLA_INET6_STATS,       /* statistics                   */
 781         IFLA_INET6_MCAST,       /* MC things. What of them?     */
 782         IFLA_INET6_CACHEINFO,   /* time values and max reasm size */
 783         __IFLA_INET6_MAX
 784 };
 785
 786 #define IFLA_INET6_MAX  (__IFLA_INET6_MAX - 1)
 787
 788 struct ifla_cacheinfo
 789 {
 790         __u32   max_reasm_len;
 791         __u32   tstamp;         /* ipv6InterfaceTable updated timestamp */
 792         __u32   reachable_time;
 793         __u32   retrans_time;
 794 };
 795
 796 /*****************************************************************
 797  *              Traffic control messages.
 798  ****/
 799
 800 struct tcmsg
 801 {
 802         unsigned char   tcm_family;
 803         unsigned char   tcm__pad1;
 804         unsigned short  tcm__pad2;
 805         int             tcm_ifindex;
 806         __u32           tcm_handle;
 807         __u32           tcm_parent;
 808         __u32           tcm_info;
 809 };
 810
 811 enum
 812 {
 813         TCA_UNSPEC,
 814         TCA_KIND,
 815         TCA_OPTIONS,
 816         TCA_STATS,
 817         TCA_XSTATS,
 818         TCA_RATE,
 819         TCA_FCNT,
 820         TCA_STATS2,
 821         __TCA_MAX
 822 };
 823
 824 #define TCA_MAX (__TCA_MAX - 1)
 825
 826 #define TCA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
 827 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
 828
 829 #ifndef __KERNEL__
 830 /* RTnetlink multicast groups - backwards compatibility for userspace */
 831 #define RTMGRP_LINK             1
 832 #define RTMGRP_NOTIFY           2
 833 #define RTMGRP_NEIGH            4
 834 #define RTMGRP_TC               8
 835
 836 #define RTMGRP_IPV4_IFADDR      0x10
 837 #define RTMGRP_IPV4_MROUTE      0x20
 838 #define RTMGRP_IPV4_ROUTE       0x40
 839
 840 #define RTMGRP_IPV6_IFADDR      0x100
 841 #define RTMGRP_IPV6_MROUTE      0x200
 842 #define RTMGRP_IPV6_ROUTE       0x400
 843 #define RTMGRP_IPV6_IFINFO      0x800
 844
 845 #define RTMGRP_DECnet_IFADDR    0x1000
 846 #define RTMGRP_DECnet_ROUTE     0x4000
 847
 848 #define RTMGRP_IPV6_PREFIX      0x20000
 849 #endif
 850
 851 /* RTnetlink multicast groups */
 852 enum rtnetlink_groups {
 853         RTNLGRP_NONE,
 854 #define RTNLGRP_NONE            RTNLGRP_NONE
 855         RTNLGRP_LINK,
 856 #define RTNLGRP_LINK            RTNLGRP_LINK
 857         RTNLGRP_NOTIFY,
 858 #define RTNLGRP_NOTIFY          RTNLGRP_NOTIFY
 859         RTNLGRP_NEIGH,
 860 #define RTNLGRP_NEIGH           RTNLGRP_NEIGH
 861         RTNLGRP_TC,
 862 #define RTNLGRP_TC              RTNLGRP_TC
 863         RTNLGRP_IPV4_IFADDR,
 864 #define RTNLGRP_IPV4_IFADDR     RTNLGRP_IPV4_IFADDR
 865         RTNLGRP_IPV4_MROUTE,
 866 #define RTNLGRP_IPV4_MROUTE     RTNLGRP_IPV4_MROUTE
 867         RTNLGRP_IPV4_ROUTE,
 868 #define RTNLGRP_IPV4_ROUTE      RTNLGRP_IPV4_ROUTE
 869         RTNLGRP_IPV6_IFADDR,
 870 #define RTNLGRP_IPV6_IFADDR     RTNLGRP_IPV6_IFADDR
 871         RTNLGRP_IPV6_MROUTE,
 872 #define RTNLGRP_IPV6_MROUTE     RTNLGRP_IPV6_MROUTE
 873         RTNLGRP_IPV6_ROUTE,
 874 #define RTNLGRP_IPV6_ROUTE      RTNLGRP_IPV6_ROUTE
 875         RTNLGRP_IPV6_IFINFO,
 876 #define RTNLGRP_IPV6_IFINFO     RTNLGRP_IPV6_IFINFO
 877         RTNLGRP_DECnet_IFADDR,
 878 #define RTNLGRP_DECnet_IFADDR   RTNLGRP_DECnet_IFADDR
 879         RTNLGRP_DECnet_ROUTE,
 880 #define RTNLGRP_DECnet_ROUTE    RTNLGRP_DECnet_ROUTE
 881         RTNLGRP_IPV6_PREFIX,
 882 #define RTNLGRP_IPV6_PREFIX     RTNLGRP_IPV6_PREFIX
 883         __RTNLGRP_MAX
 884 };
 885 #define RTNLGRP_MAX     (__RTNLGRP_MAX - 1)
 886
 887 /* TC action piece */
 888 struct tcamsg
 889 {
 890         unsigned char   tca_family;
 891         unsigned char   tca__pad1;
 892         unsigned short  tca__pad2;
 893 };
 894 #define TA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
 895 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
 896 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
 897 #define TCAA_MAX 1
 898
 899 /* End of information exported to user level */
 900
 901 #ifdef __KERNEL__
 902
 903 #include <linux/config.h>
 904
 905 extern size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size);
 906 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
 907 {
 908         int len = strlen(str) + 1;
 909         return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
 910 }
 911
 912 extern int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len);
 913
 914 #define rtattr_parse_nested(tb, max, rta) \
 915         rtattr_parse((tb), (max), RTA_DATA((rta)), RTA_PAYLOAD((rta)))
 916
 917 extern struct sock *rtnl;
 918
 919 struct rtnetlink_link
 920 {
 921         int (*doit)(struct sk_buff *, struct nlmsghdr*, void *attr);
 922         int (*dumpit)(struct sk_buff *, struct netlink_callback *cb);
 923 };
 924
 925 extern struct rtnetlink_link * rtnetlink_links[NPROTO];
 926 extern int rtnetlink_send(struct sk_buff *skb, u32 pid, u32 group, int echo);
 927 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
 928
 929 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
 930
 931 #define RTA_PUT(skb, attrtype, attrlen, data) \
 932 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
 933                  goto rtattr_failure; \
 934         __rta_fill(skb, attrtype, attrlen, data); })
 935
 936 #define RTA_APPEND(skb, attrlen, data) \
 937 ({      if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
 938                 goto rtattr_failure; \
 939         memcpy(skb_put(skb, attrlen), data, attrlen); })
 940
 941 #define RTA_PUT_NOHDR(skb, attrlen, data) \
 942 ({      RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \
 943         memset(skb->tail - (RTA_ALIGN(attrlen) - attrlen), 0, \
 944                RTA_ALIGN(attrlen) - attrlen); })
 945
 946 #define RTA_PUT_U8(skb, attrtype, value) \
 947 ({      u8 _tmp = (value); \
 948         RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })
 949
 950 #define RTA_PUT_U16(skb, attrtype, value) \
 951 ({      u16 _tmp = (value); \
 952         RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })
 953
 954 #define RTA_PUT_U32(skb, attrtype, value) \
 955 ({      u32 _tmp = (value); \
 956         RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
 957
 958 #define RTA_PUT_U64(skb, attrtype, value) \
 959 ({      u64 _tmp = (value); \
 960         RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
 961
 962 #define RTA_PUT_SECS(skb, attrtype, value) \
 963         RTA_PUT_U64(skb, attrtype, (value) / HZ)
 964
 965 #define RTA_PUT_MSECS(skb, attrtype, value) \
 966         RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
 967
 968 #define RTA_PUT_STRING(skb, attrtype, value) \
 969         RTA_PUT(skb, attrtype, strlen(value) + 1, value)
 970
 971 #define RTA_PUT_FLAG(skb, attrtype) \
 972         RTA_PUT(skb, attrtype, 0, NULL);
 973
 974 #define RTA_NEST(skb, type) \
 975 ({      struct rtattr *__start = (struct rtattr *) (skb)->tail; \
 976         RTA_PUT(skb, type, 0, NULL); \
 977         __start;  })
 978
 979 #define RTA_NEST_END(skb, start) \
 980 ({      (start)->rta_len = ((skb)->tail - (unsigned char *) (start)); \
 981         (skb)->len; })
 982
 983 #define RTA_NEST_CANCEL(skb, start) \
 984 ({      if (start) \
 985                 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
 986         -1; })
 987
 988 #define RTA_GET_U8(rta) \
 989 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
 990                 goto rtattr_failure; \
 991         *(u8 *) RTA_DATA(rta); })
 992
 993 #define RTA_GET_U16(rta) \
 994 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
 995                 goto rtattr_failure; \
 996         *(u16 *) RTA_DATA(rta); })
 997
 998 #define RTA_GET_U32(rta) \
 999 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
1000                 goto rtattr_failure; \
1001         *(u32 *) RTA_DATA(rta); })
1002
1003 #define RTA_GET_U64(rta) \
1004 ({      u64 _tmp; \
1005         if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
1006                 goto rtattr_failure; \
1007         memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
1008         _tmp; })
1009
1010 #define RTA_GET_FLAG(rta) (!!(rta))
1011
1012 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
1013 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
1014
1015 static inline struct rtattr *
1016 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
1017 {
1018         struct rtattr *rta;
1019         int size = RTA_LENGTH(attrlen);
1020
1021         rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
1022         rta->rta_type = attrtype;
1023         rta->rta_len = size;
1024         memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
1025         return rta;
1026 }
1027
1028 #define __RTA_PUT(skb, attrtype, attrlen) \
1029 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
1030                 goto rtattr_failure; \
1031         __rta_reserve(skb, attrtype, attrlen); })
1032
1033 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
1034
1035 extern struct semaphore rtnl_sem;
1036
1037 #define rtnl_shlock()           down(&rtnl_sem)
1038 #define rtnl_shlock_nowait()    down_trylock(&rtnl_sem)
1039
1040 #define rtnl_shunlock() do { up(&rtnl_sem); \
1041                              if (rtnl && rtnl->sk_receive_queue.qlen) \
1042                                      rtnl->sk_data_ready(rtnl, 0); \
1043                         } while(0)
1044
1045 extern void rtnl_lock(void);
1046 extern int rtnl_lock_interruptible(void);
1047 extern void rtnl_unlock(void);
1048 extern void rtnetlink_init(void);
1049
1050 #define ASSERT_RTNL() do { \
1051         if (unlikely(down_trylock(&rtnl_sem) == 0)) { \
1052                 up(&rtnl_sem); \
1053                 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
1054                        __FILE__,  __LINE__); \
1055                 dump_stack(); \
1056         } \
1057 } while(0)
1058
1059 #define BUG_TRAP(x) do { \
1060         if (unlikely(!(x))) { \
1061                 printk(KERN_ERR "KERNEL: assertion (%s) failed at %s (%d)\n", \
1062                         #x,  __FILE__ , __LINE__); \
1063         } \
1064 } while(0)
1065
1066 #endif /* __KERNEL__ */
1067
1068
1069 #endif  /* __LINUX_RTNETLINK_H */