include/linux/rtnetlink.h

   1 #ifndef __LINUX_RTNETLINK_H
   2 #define __LINUX_RTNETLINK_H
   3
   4 #include <linux/netlink.h>
   5 #include <linux/if_link.h>
   6 #include <linux/if_addr.h>
   7 #include <linux/neighbour.h>
   8
   9 /****
  10  *              Routing/neighbour discovery messages.
  11  ****/
  12
  13 /* Types of messages */
  14
  15 enum {
  16         RTM_BASE        = 16,
  17 #define RTM_BASE        RTM_BASE
  18
  19         RTM_NEWLINK     = 16,
  20 #define RTM_NEWLINK     RTM_NEWLINK
  21         RTM_DELLINK,
  22 #define RTM_DELLINK     RTM_DELLINK
  23         RTM_GETLINK,
  24 #define RTM_GETLINK     RTM_GETLINK
  25         RTM_SETLINK,
  26 #define RTM_SETLINK     RTM_SETLINK
  27
  28         RTM_NEWADDR     = 20,
  29 #define RTM_NEWADDR     RTM_NEWADDR
  30         RTM_DELADDR,
  31 #define RTM_DELADDR     RTM_DELADDR
  32         RTM_GETADDR,
  33 #define RTM_GETADDR     RTM_GETADDR
  34
  35         RTM_NEWROUTE    = 24,
  36 #define RTM_NEWROUTE    RTM_NEWROUTE
  37         RTM_DELROUTE,
  38 #define RTM_DELROUTE    RTM_DELROUTE
  39         RTM_GETROUTE,
  40 #define RTM_GETROUTE    RTM_GETROUTE
  41
  42         RTM_NEWNEIGH    = 28,
  43 #define RTM_NEWNEIGH    RTM_NEWNEIGH
  44         RTM_DELNEIGH,
  45 #define RTM_DELNEIGH    RTM_DELNEIGH
  46         RTM_GETNEIGH,
  47 #define RTM_GETNEIGH    RTM_GETNEIGH
  48
  49         RTM_NEWRULE     = 32,
  50 #define RTM_NEWRULE     RTM_NEWRULE
  51         RTM_DELRULE,
  52 #define RTM_DELRULE     RTM_DELRULE
  53         RTM_GETRULE,
  54 #define RTM_GETRULE     RTM_GETRULE
  55
  56         RTM_NEWQDISC    = 36,
  57 #define RTM_NEWQDISC    RTM_NEWQDISC
  58         RTM_DELQDISC,
  59 #define RTM_DELQDISC    RTM_DELQDISC
  60         RTM_GETQDISC,
  61 #define RTM_GETQDISC    RTM_GETQDISC
  62
  63         RTM_NEWTCLASS   = 40,
  64 #define RTM_NEWTCLASS   RTM_NEWTCLASS
  65         RTM_DELTCLASS,
  66 #define RTM_DELTCLASS   RTM_DELTCLASS
  67         RTM_GETTCLASS,
  68 #define RTM_GETTCLASS   RTM_GETTCLASS
  69
  70         RTM_NEWTFILTER  = 44,
  71 #define RTM_NEWTFILTER  RTM_NEWTFILTER
  72         RTM_DELTFILTER,
  73 #define RTM_DELTFILTER  RTM_DELTFILTER
  74         RTM_GETTFILTER,
  75 #define RTM_GETTFILTER  RTM_GETTFILTER
  76
  77         RTM_NEWACTION   = 48,
  78 #define RTM_NEWACTION   RTM_NEWACTION
  79         RTM_DELACTION,
  80 #define RTM_DELACTION   RTM_DELACTION
  81         RTM_GETACTION,
  82 #define RTM_GETACTION   RTM_GETACTION
  83
  84         RTM_NEWPREFIX   = 52,
  85 #define RTM_NEWPREFIX   RTM_NEWPREFIX
  86
  87         RTM_GETMULTICAST = 58,
  88 #define RTM_GETMULTICAST RTM_GETMULTICAST
  89
  90         RTM_GETANYCAST  = 62,
  91 #define RTM_GETANYCAST  RTM_GETANYCAST
  92
  93         RTM_NEWNEIGHTBL = 64,
  94 #define RTM_NEWNEIGHTBL RTM_NEWNEIGHTBL
  95         RTM_GETNEIGHTBL = 66,
  96 #define RTM_GETNEIGHTBL RTM_GETNEIGHTBL
  97         RTM_SETNEIGHTBL,
  98 #define RTM_SETNEIGHTBL RTM_SETNEIGHTBL
  99
 100         RTM_NEWNDUSEROPT = 68,
 101 #define RTM_NEWNDUSEROPT RTM_NEWNDUSEROPT
 102
 103         RTM_NEWADDRLABEL = 72,
 104 #define RTM_NEWADDRLABEL RTM_NEWADDRLABEL
 105         RTM_DELADDRLABEL,
 106 #define RTM_NEWADDRLABEL RTM_NEWADDRLABEL
 107         RTM_GETADDRLABEL,
 108 #define RTM_GETADDRLABEL RTM_GETADDRLABEL
 109
 110         __RTM_MAX,
 111 #define RTM_MAX         (((__RTM_MAX + 3) & ~3) - 1)
 112 };
 113
 114 #define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE)
 115 #define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2)
 116 #define RTM_FAM(cmd)    (((cmd) - RTM_BASE) >> 2)
 117
 118 /*
 119    Generic structure for encapsulation of optional route information.
 120    It is reminiscent of sockaddr, but with sa_family replaced
 121    with attribute type.
 122  */
 123
 124 struct rtattr
 125 {
 126         unsigned short  rta_len;
 127         unsigned short  rta_type;
 128 };
 129
 130 /* Macros to handle rtattributes */
 131
 132 #define RTA_ALIGNTO     4
 133 #define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) )
 134 #define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \
 135                          (rta)->rta_len >= sizeof(struct rtattr) && \
 136                          (rta)->rta_len <= (len))
 137 #define RTA_NEXT(rta,attrlen)   ((attrlen) -= RTA_ALIGN((rta)->rta_len), \
 138                                  (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
 139 #define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len))
 140 #define RTA_SPACE(len)  RTA_ALIGN(RTA_LENGTH(len))
 141 #define RTA_DATA(rta)   ((void*)(((char*)(rta)) + RTA_LENGTH(0)))
 142 #define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0))
 143
 144
 145
 146
 147 /******************************************************************************
 148  *              Definitions used in routing table administration.
 149  ****/
 150
 151 struct rtmsg
 152 {
 153         unsigned char           rtm_family;
 154         unsigned char           rtm_dst_len;
 155         unsigned char           rtm_src_len;
 156         unsigned char           rtm_tos;
 157
 158         unsigned char           rtm_table;      /* Routing table id */
 159         unsigned char           rtm_protocol;   /* Routing protocol; see below  */
 160         unsigned char           rtm_scope;      /* See below */
 161         unsigned char           rtm_type;       /* See below    */
 162
 163         unsigned                rtm_flags;
 164 };
 165
 166 /* rtm_type */
 167
 168 enum
 169 {
 170         RTN_UNSPEC,
 171         RTN_UNICAST,            /* Gateway or direct route      */
 172         RTN_LOCAL,              /* Accept locally               */
 173         RTN_BROADCAST,          /* Accept locally as broadcast,
 174                                    send as broadcast */
 175         RTN_ANYCAST,            /* Accept locally as broadcast,
 176                                    but send as unicast */
 177         RTN_MULTICAST,          /* Multicast route              */
 178         RTN_BLACKHOLE,          /* Drop                         */
 179         RTN_UNREACHABLE,        /* Destination is unreachable   */
 180         RTN_PROHIBIT,           /* Administratively prohibited  */
 181         RTN_THROW,              /* Not in this table            */
 182         RTN_NAT,                /* Translate this address       */
 183         RTN_XRESOLVE,           /* Use external resolver        */
 184         __RTN_MAX
 185 };
 186
 187 #define RTN_MAX (__RTN_MAX - 1)
 188
 189
 190 /* rtm_protocol */
 191
 192 #define RTPROT_UNSPEC   0
 193 #define RTPROT_REDIRECT 1       /* Route installed by ICMP redirects;
 194                                    not used by current IPv4 */
 195 #define RTPROT_KERNEL   2       /* Route installed by kernel            */
 196 #define RTPROT_BOOT     3       /* Route installed during boot          */
 197 #define RTPROT_STATIC   4       /* Route installed by administrator     */
 198
 199 /* Values of protocol >= RTPROT_STATIC are not interpreted by kernel;
 200    they are just passed from user and back as is.
 201    It will be used by hypothetical multiple routing daemons.
 202    Note that protocol values should be standardized in order to
 203    avoid conflicts.
 204  */
 205
 206 #define RTPROT_GATED    8       /* Apparently, GateD */
 207 #define RTPROT_RA       9       /* RDISC/ND router advertisements */
 208 #define RTPROT_MRT      10      /* Merit MRT */
 209 #define RTPROT_ZEBRA    11      /* Zebra */
 210 #define RTPROT_BIRD     12      /* BIRD */
 211 #define RTPROT_DNROUTED 13      /* DECnet routing daemon */
 212 #define RTPROT_XORP     14      /* XORP */
 213 #define RTPROT_NTK      15      /* Netsukuku */
 214
 215 /* rtm_scope
 216
 217    Really it is not scope, but sort of distance to the destination.
 218    NOWHERE are reserved for not existing destinations, HOST is our
 219    local addresses, LINK are destinations, located on directly attached
 220    link and UNIVERSE is everywhere in the Universe.
 221
 222    Intermediate values are also possible f.e. interior routes
 223    could be assigned a value between UNIVERSE and LINK.
 224 */
 225
 226 enum rt_scope_t
 227 {
 228         RT_SCOPE_UNIVERSE=0,
 229 /* User defined values  */
 230         RT_SCOPE_SITE=200,
 231         RT_SCOPE_LINK=253,
 232         RT_SCOPE_HOST=254,
 233         RT_SCOPE_NOWHERE=255
 234 };
 235
 236 /* rtm_flags */
 237
 238 #define RTM_F_NOTIFY            0x100   /* Notify user of route change  */
 239 #define RTM_F_CLONED            0x200   /* This route is cloned         */
 240 #define RTM_F_EQUALIZE          0x400   /* Multipath equalizer: NI      */
 241 #define RTM_F_PREFIX            0x800   /* Prefix addresses             */
 242
 243 /* Reserved table identifiers */
 244
 245 enum rt_class_t
 246 {
 247         RT_TABLE_UNSPEC=0,
 248 /* User defined values */
 249         RT_TABLE_DEFAULT=253,
 250         RT_TABLE_MAIN=254,
 251         RT_TABLE_LOCAL=255,
 252         RT_TABLE_MAX=0xFFFFFFFF
 253 };
 254
 255
 256 /* Routing message attributes */
 257
 258 enum rtattr_type_t
 259 {
 260         RTA_UNSPEC,
 261         RTA_DST,
 262         RTA_SRC,
 263         RTA_IIF,
 264         RTA_OIF,
 265         RTA_GATEWAY,
 266         RTA_PRIORITY,
 267         RTA_PREFSRC,
 268         RTA_METRICS,
 269         RTA_MULTIPATH,
 270         RTA_PROTOINFO, /* no longer used */
 271         RTA_FLOW,
 272         RTA_CACHEINFO,
 273         RTA_SESSION, /* no longer used */
 274         RTA_MP_ALGO, /* no longer used */
 275         RTA_TABLE,
 276         __RTA_MAX
 277 };
 278
 279 #define RTA_MAX (__RTA_MAX - 1)
 280
 281 #define RTM_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
 282 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
 283
 284 /* RTM_MULTIPATH --- array of struct rtnexthop.
 285  *
 286  * "struct rtnexthop" describes all necessary nexthop information,
 287  * i.e. parameters of path to a destination via this nexthop.
 288  *
 289  * At the moment it is impossible to set different prefsrc, mtu, window
 290  * and rtt for different paths from multipath.
 291  */
 292
 293 struct rtnexthop
 294 {
 295         unsigned short          rtnh_len;
 296         unsigned char           rtnh_flags;
 297         unsigned char           rtnh_hops;
 298         int                     rtnh_ifindex;
 299 };
 300
 301 /* rtnh_flags */
 302
 303 #define RTNH_F_DEAD             1       /* Nexthop is dead (used by multipath)  */
 304 #define RTNH_F_PERVASIVE        2       /* Do recursive gateway lookup  */
 305 #define RTNH_F_ONLINK           4       /* Gateway is forced on link    */
 306
 307 /* Macros to handle hexthops */
 308
 309 #define RTNH_ALIGNTO    4
 310 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) )
 311 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \
 312                            ((int)(rtnh)->rtnh_len) <= (len))
 313 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len)))
 314 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len))
 315 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len))
 316 #define RTNH_DATA(rtnh)   ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0)))
 317
 318 /* RTM_CACHEINFO */
 319
 320 struct rta_cacheinfo
 321 {
 322         __u32   rta_clntref;
 323         __u32   rta_lastuse;
 324         __s32   rta_expires;
 325         __u32   rta_error;
 326         __u32   rta_used;
 327
 328 #define RTNETLINK_HAVE_PEERINFO 1
 329         __u32   rta_id;
 330         __u32   rta_ts;
 331         __u32   rta_tsage;
 332 };
 333
 334 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
 335
 336 enum
 337 {
 338         RTAX_UNSPEC,
 339 #define RTAX_UNSPEC RTAX_UNSPEC
 340         RTAX_LOCK,
 341 #define RTAX_LOCK RTAX_LOCK
 342         RTAX_MTU,
 343 #define RTAX_MTU RTAX_MTU
 344         RTAX_WINDOW,
 345 #define RTAX_WINDOW RTAX_WINDOW
 346         RTAX_RTT,
 347 #define RTAX_RTT RTAX_RTT
 348         RTAX_RTTVAR,
 349 #define RTAX_RTTVAR RTAX_RTTVAR
 350         RTAX_SSTHRESH,
 351 #define RTAX_SSTHRESH RTAX_SSTHRESH
 352         RTAX_CWND,
 353 #define RTAX_CWND RTAX_CWND
 354         RTAX_ADVMSS,
 355 #define RTAX_ADVMSS RTAX_ADVMSS
 356         RTAX_REORDERING,
 357 #define RTAX_REORDERING RTAX_REORDERING
 358         RTAX_HOPLIMIT,
 359 #define RTAX_HOPLIMIT RTAX_HOPLIMIT
 360         RTAX_INITCWND,
 361 #define RTAX_INITCWND RTAX_INITCWND
 362         RTAX_FEATURES,
 363 #define RTAX_FEATURES RTAX_FEATURES
 364         RTAX_RTO_MIN,
 365 #define RTAX_RTO_MIN RTAX_RTO_MIN
 366         __RTAX_MAX
 367 };
 368
 369 #define RTAX_MAX (__RTAX_MAX - 1)
 370
 371 #define RTAX_FEATURE_ECN        0x00000001
 372 #define RTAX_FEATURE_SACK       0x00000002
 373 #define RTAX_FEATURE_TIMESTAMP  0x00000004
 374 #define RTAX_FEATURE_ALLFRAG    0x00000008
 375
 376 struct rta_session
 377 {
 378         __u8    proto;
 379         __u8    pad1;
 380         __u16   pad2;
 381
 382         union {
 383                 struct {
 384                         __u16   sport;
 385                         __u16   dport;
 386                 } ports;
 387
 388                 struct {
 389                         __u8    type;
 390                         __u8    code;
 391                         __u16   ident;
 392                 } icmpt;
 393
 394                 __u32           spi;
 395         } u;
 396 };
 397
 398 /****
 399  *              General form of address family dependent message.
 400  ****/
 401
 402 struct rtgenmsg
 403 {
 404         unsigned char           rtgen_family;
 405 };
 406
 407 /*****************************************************************
 408  *              Link layer specific messages.
 409  ****/
 410
 411 /* struct ifinfomsg
 412  * passes link level specific information, not dependent
 413  * on network protocol.
 414  */
 415
 416 struct ifinfomsg
 417 {
 418         unsigned char   ifi_family;
 419         unsigned char   __ifi_pad;
 420         unsigned short  ifi_type;               /* ARPHRD_* */
 421         int             ifi_index;              /* Link index   */
 422         unsigned        ifi_flags;              /* IFF_* flags  */
 423         unsigned        ifi_change;             /* IFF_* change mask */
 424 };
 425
 426 /********************************************************************
 427  *              prefix information
 428  ****/
 429
 430 struct prefixmsg
 431 {
 432         unsigned char   prefix_family;
 433         unsigned char   prefix_pad1;
 434         unsigned short  prefix_pad2;
 435         int             prefix_ifindex;
 436         unsigned char   prefix_type;
 437         unsigned char   prefix_len;
 438         unsigned char   prefix_flags;
 439         unsigned char   prefix_pad3;
 440 };
 441
 442 enum
 443 {
 444         PREFIX_UNSPEC,
 445         PREFIX_ADDRESS,
 446         PREFIX_CACHEINFO,
 447         __PREFIX_MAX
 448 };
 449
 450 #define PREFIX_MAX      (__PREFIX_MAX - 1)
 451
 452 struct prefix_cacheinfo
 453 {
 454         __u32   preferred_time;
 455         __u32   valid_time;
 456 };
 457
 458
 459 /*****************************************************************
 460  *              Traffic control messages.
 461  ****/
 462
 463 struct tcmsg
 464 {
 465         unsigned char   tcm_family;
 466         unsigned char   tcm__pad1;
 467         unsigned short  tcm__pad2;
 468         int             tcm_ifindex;
 469         __u32           tcm_handle;
 470         __u32           tcm_parent;
 471         __u32           tcm_info;
 472 };
 473
 474 enum
 475 {
 476         TCA_UNSPEC,
 477         TCA_KIND,
 478         TCA_OPTIONS,
 479         TCA_STATS,
 480         TCA_XSTATS,
 481         TCA_RATE,
 482         TCA_FCNT,
 483         TCA_STATS2,
 484         __TCA_MAX
 485 };
 486
 487 #define TCA_MAX (__TCA_MAX - 1)
 488
 489 #define TCA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
 490 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
 491
 492 /********************************************************************
 493  *              Neighbor Discovery userland options
 494  ****/
 495
 496 struct nduseroptmsg
 497 {
 498         unsigned char   nduseropt_family;
 499         unsigned char   nduseropt_pad1;
 500         unsigned short  nduseropt_opts_len;     /* Total length of options */
 501         int             nduseropt_ifindex;
 502         __u8            nduseropt_icmp_type;
 503         __u8            nduseropt_icmp_code;
 504         unsigned short  nduseropt_pad2;
 505         unsigned int    nduseropt_pad3;
 506         /* Followed by one or more ND options */
 507 };
 508
 509 enum
 510 {
 511         NDUSEROPT_UNSPEC,
 512         NDUSEROPT_SRCADDR,
 513         __NDUSEROPT_MAX
 514 };
 515
 516 #define NDUSEROPT_MAX   (__NDUSEROPT_MAX - 1)
 517
 518 #ifndef __KERNEL__
 519 /* RTnetlink multicast groups - backwards compatibility for userspace */
 520 #define RTMGRP_LINK             1
 521 #define RTMGRP_NOTIFY           2
 522 #define RTMGRP_NEIGH            4
 523 #define RTMGRP_TC               8
 524
 525 #define RTMGRP_IPV4_IFADDR      0x10
 526 #define RTMGRP_IPV4_MROUTE      0x20
 527 #define RTMGRP_IPV4_ROUTE       0x40
 528 #define RTMGRP_IPV4_RULE        0x80
 529
 530 #define RTMGRP_IPV6_IFADDR      0x100
 531 #define RTMGRP_IPV6_MROUTE      0x200
 532 #define RTMGRP_IPV6_ROUTE       0x400
 533 #define RTMGRP_IPV6_IFINFO      0x800
 534
 535 #define RTMGRP_DECnet_IFADDR    0x1000
 536 #define RTMGRP_DECnet_ROUTE     0x4000
 537
 538 #define RTMGRP_IPV6_PREFIX      0x20000
 539 #endif
 540
 541 /* RTnetlink multicast groups */
 542 enum rtnetlink_groups {
 543         RTNLGRP_NONE,
 544 #define RTNLGRP_NONE            RTNLGRP_NONE
 545         RTNLGRP_LINK,
 546 #define RTNLGRP_LINK            RTNLGRP_LINK
 547         RTNLGRP_NOTIFY,
 548 #define RTNLGRP_NOTIFY          RTNLGRP_NOTIFY
 549         RTNLGRP_NEIGH,
 550 #define RTNLGRP_NEIGH           RTNLGRP_NEIGH
 551         RTNLGRP_TC,
 552 #define RTNLGRP_TC              RTNLGRP_TC
 553         RTNLGRP_IPV4_IFADDR,
 554 #define RTNLGRP_IPV4_IFADDR     RTNLGRP_IPV4_IFADDR
 555         RTNLGRP_IPV4_MROUTE,
 556 #define RTNLGRP_IPV4_MROUTE     RTNLGRP_IPV4_MROUTE
 557         RTNLGRP_IPV4_ROUTE,
 558 #define RTNLGRP_IPV4_ROUTE      RTNLGRP_IPV4_ROUTE
 559         RTNLGRP_IPV4_RULE,
 560 #define RTNLGRP_IPV4_RULE       RTNLGRP_IPV4_RULE
 561         RTNLGRP_IPV6_IFADDR,
 562 #define RTNLGRP_IPV6_IFADDR     RTNLGRP_IPV6_IFADDR
 563         RTNLGRP_IPV6_MROUTE,
 564 #define RTNLGRP_IPV6_MROUTE     RTNLGRP_IPV6_MROUTE
 565         RTNLGRP_IPV6_ROUTE,
 566 #define RTNLGRP_IPV6_ROUTE      RTNLGRP_IPV6_ROUTE
 567         RTNLGRP_IPV6_IFINFO,
 568 #define RTNLGRP_IPV6_IFINFO     RTNLGRP_IPV6_IFINFO
 569         RTNLGRP_DECnet_IFADDR,
 570 #define RTNLGRP_DECnet_IFADDR   RTNLGRP_DECnet_IFADDR
 571         RTNLGRP_NOP2,
 572         RTNLGRP_DECnet_ROUTE,
 573 #define RTNLGRP_DECnet_ROUTE    RTNLGRP_DECnet_ROUTE
 574         RTNLGRP_DECnet_RULE,
 575 #define RTNLGRP_DECnet_RULE     RTNLGRP_DECnet_RULE
 576         RTNLGRP_NOP4,
 577         RTNLGRP_IPV6_PREFIX,
 578 #define RTNLGRP_IPV6_PREFIX     RTNLGRP_IPV6_PREFIX
 579         RTNLGRP_IPV6_RULE,
 580 #define RTNLGRP_IPV6_RULE       RTNLGRP_IPV6_RULE
 581         RTNLGRP_ND_USEROPT,
 582 #define RTNLGRP_ND_USEROPT      RTNLGRP_ND_USEROPT
 583         __RTNLGRP_MAX
 584 };
 585 #define RTNLGRP_MAX     (__RTNLGRP_MAX - 1)
 586
 587 /* TC action piece */
 588 struct tcamsg
 589 {
 590         unsigned char   tca_family;
 591         unsigned char   tca__pad1;
 592         unsigned short  tca__pad2;
 593 };
 594 #define TA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
 595 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
 596 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
 597 #define TCAA_MAX 1
 598
 599 /* End of information exported to user level */
 600
 601 #ifdef __KERNEL__
 602
 603 #include <linux/mutex.h>
 604
 605 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
 606 {
 607         int len = strlen(str) + 1;
 608         return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
 609 }
 610
 611 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
 612 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
 613 extern int rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
 614                        struct nlmsghdr *nlh, gfp_t flags);
 615 extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
 616 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
 617 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
 618                               u32 id, u32 ts, u32 tsage, long expires,
 619                               u32 error);
 620
 621 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
 622
 623 #define RTA_PUT(skb, attrtype, attrlen, data) \
 624 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
 625                  goto rtattr_failure; \
 626         __rta_fill(skb, attrtype, attrlen, data); })
 627
 628 #define RTA_APPEND(skb, attrlen, data) \
 629 ({      if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
 630                 goto rtattr_failure; \
 631         memcpy(skb_put(skb, attrlen), data, attrlen); })
 632
 633 #define RTA_PUT_NOHDR(skb, attrlen, data) \
 634 ({      RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \
 635         memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \
 636                RTA_ALIGN(attrlen) - attrlen); })
 637
 638 #define RTA_PUT_U8(skb, attrtype, value) \
 639 ({      u8 _tmp = (value); \
 640         RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })
 641
 642 #define RTA_PUT_U16(skb, attrtype, value) \
 643 ({      u16 _tmp = (value); \
 644         RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })
 645
 646 #define RTA_PUT_U32(skb, attrtype, value) \
 647 ({      u32 _tmp = (value); \
 648         RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
 649
 650 #define RTA_PUT_U64(skb, attrtype, value) \
 651 ({      u64 _tmp = (value); \
 652         RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
 653
 654 #define RTA_PUT_SECS(skb, attrtype, value) \
 655         RTA_PUT_U64(skb, attrtype, (value) / HZ)
 656
 657 #define RTA_PUT_MSECS(skb, attrtype, value) \
 658         RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
 659
 660 #define RTA_PUT_STRING(skb, attrtype, value) \
 661         RTA_PUT(skb, attrtype, strlen(value) + 1, value)
 662
 663 #define RTA_PUT_FLAG(skb, attrtype) \
 664         RTA_PUT(skb, attrtype, 0, NULL);
 665
 666 #define RTA_NEST(skb, type) \
 667 ({      struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
 668         RTA_PUT(skb, type, 0, NULL); \
 669         __start;  })
 670
 671 #define RTA_NEST_END(skb, start) \
 672 ({      (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
 673         (skb)->len; })
 674
 675 #define RTA_NEST_COMPAT(skb, type, attrlen, data) \
 676 ({      struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
 677         RTA_PUT(skb, type, attrlen, data); \
 678         RTA_NEST(skb, type); \
 679         __start; })
 680
 681 #define RTA_NEST_COMPAT_END(skb, start) \
 682 ({      struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \
 683         (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
 684         RTA_NEST_END(skb, __nest); \
 685         (skb)->len; })
 686
 687 #define RTA_NEST_CANCEL(skb, start) \
 688 ({      if (start) \
 689                 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
 690         -1; })
 691
 692 #define RTA_GET_U8(rta) \
 693 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
 694                 goto rtattr_failure; \
 695         *(u8 *) RTA_DATA(rta); })
 696
 697 #define RTA_GET_U16(rta) \
 698 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
 699                 goto rtattr_failure; \
 700         *(u16 *) RTA_DATA(rta); })
 701
 702 #define RTA_GET_U32(rta) \
 703 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
 704                 goto rtattr_failure; \
 705         *(u32 *) RTA_DATA(rta); })
 706
 707 #define RTA_GET_U64(rta) \
 708 ({      u64 _tmp; \
 709         if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
 710                 goto rtattr_failure; \
 711         memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
 712         _tmp; })
 713
 714 #define RTA_GET_FLAG(rta) (!!(rta))
 715
 716 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
 717 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
 718
 719 static inline struct rtattr *
 720 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
 721 {
 722         struct rtattr *rta;
 723         int size = RTA_LENGTH(attrlen);
 724
 725         rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
 726         rta->rta_type = attrtype;
 727         rta->rta_len = size;
 728         memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
 729         return rta;
 730 }
 731
 732 #define __RTA_PUT(skb, attrtype, attrlen) \
 733 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
 734                 goto rtattr_failure; \
 735         __rta_reserve(skb, attrtype, attrlen); })
 736
 737 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
 738
 739 /* RTNL is used as a global lock for all changes to network configuration  */
 740 extern void rtnl_lock(void);
 741 extern void rtnl_unlock(void);
 742 extern int rtnl_trylock(void);
 743 extern int rtnl_is_locked(void);
 744
 745 extern void rtnetlink_init(void);
 746 extern void __rtnl_unlock(void);
 747
 748 #define ASSERT_RTNL() do { \
 749         if (unlikely(!rtnl_is_locked())) { \
 750                 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
 751                        __FILE__,  __LINE__); \
 752                 dump_stack(); \
 753         } \
 754 } while(0)
 755
 756 #define BUG_TRAP(x) do { \
 757         if (unlikely(!(x))) { \
 758                 printk(KERN_ERR "KERNEL: assertion (%s) failed at %s (%d)\n", \
 759                         #x,  __FILE__ , __LINE__); \
 760         } \
 761 } while(0)
 762
 763 static inline u32 rtm_get_table(struct rtattr **rta, u8 table)
 764 {
 765         return RTA_GET_U32(rta[RTA_TABLE-1]);
 766 rtattr_failure:
 767         return table;
 768 }
 769
 770 #endif /* __KERNEL__ */
 771
 772
 773 #endif  /* __LINUX_RTNETLINK_H */