include/linux/rtnetlink.h

   1 #ifndef __LINUX_RTNETLINK_H
   2 #define __LINUX_RTNETLINK_H
   3
   4 #include <linux/types.h>
   5 #include <linux/netlink.h>
   6 #include <linux/if_link.h>
   7 #include <linux/if_addr.h>
   8 #include <linux/neighbour.h>
   9
  10 /****
  11  *              Routing/neighbour discovery messages.
  12  ****/
  13
  14 /* Types of messages */
  15
  16 enum {
  17         RTM_BASE        = 16,
  18 #define RTM_BASE        RTM_BASE
  19
  20         RTM_NEWLINK     = 16,
  21 #define RTM_NEWLINK     RTM_NEWLINK
  22         RTM_DELLINK,
  23 #define RTM_DELLINK     RTM_DELLINK
  24         RTM_GETLINK,
  25 #define RTM_GETLINK     RTM_GETLINK
  26         RTM_SETLINK,
  27 #define RTM_SETLINK     RTM_SETLINK
  28
  29         RTM_NEWADDR     = 20,
  30 #define RTM_NEWADDR     RTM_NEWADDR
  31         RTM_DELADDR,
  32 #define RTM_DELADDR     RTM_DELADDR
  33         RTM_GETADDR,
  34 #define RTM_GETADDR     RTM_GETADDR
  35
  36         RTM_NEWROUTE    = 24,
  37 #define RTM_NEWROUTE    RTM_NEWROUTE
  38         RTM_DELROUTE,
  39 #define RTM_DELROUTE    RTM_DELROUTE
  40         RTM_GETROUTE,
  41 #define RTM_GETROUTE    RTM_GETROUTE
  42
  43         RTM_NEWNEIGH    = 28,
  44 #define RTM_NEWNEIGH    RTM_NEWNEIGH
  45         RTM_DELNEIGH,
  46 #define RTM_DELNEIGH    RTM_DELNEIGH
  47         RTM_GETNEIGH,
  48 #define RTM_GETNEIGH    RTM_GETNEIGH
  49
  50         RTM_NEWRULE     = 32,
  51 #define RTM_NEWRULE     RTM_NEWRULE
  52         RTM_DELRULE,
  53 #define RTM_DELRULE     RTM_DELRULE
  54         RTM_GETRULE,
  55 #define RTM_GETRULE     RTM_GETRULE
  56
  57         RTM_NEWQDISC    = 36,
  58 #define RTM_NEWQDISC    RTM_NEWQDISC
  59         RTM_DELQDISC,
  60 #define RTM_DELQDISC    RTM_DELQDISC
  61         RTM_GETQDISC,
  62 #define RTM_GETQDISC    RTM_GETQDISC
  63
  64         RTM_NEWTCLASS   = 40,
  65 #define RTM_NEWTCLASS   RTM_NEWTCLASS
  66         RTM_DELTCLASS,
  67 #define RTM_DELTCLASS   RTM_DELTCLASS
  68         RTM_GETTCLASS,
  69 #define RTM_GETTCLASS   RTM_GETTCLASS
  70
  71         RTM_NEWTFILTER  = 44,
  72 #define RTM_NEWTFILTER  RTM_NEWTFILTER
  73         RTM_DELTFILTER,
  74 #define RTM_DELTFILTER  RTM_DELTFILTER
  75         RTM_GETTFILTER,
  76 #define RTM_GETTFILTER  RTM_GETTFILTER
  77
  78         RTM_NEWACTION   = 48,
  79 #define RTM_NEWACTION   RTM_NEWACTION
  80         RTM_DELACTION,
  81 #define RTM_DELACTION   RTM_DELACTION
  82         RTM_GETACTION,
  83 #define RTM_GETACTION   RTM_GETACTION
  84
  85         RTM_NEWPREFIX   = 52,
  86 #define RTM_NEWPREFIX   RTM_NEWPREFIX
  87
  88         RTM_GETMULTICAST = 58,
  89 #define RTM_GETMULTICAST RTM_GETMULTICAST
  90
  91         RTM_GETANYCAST  = 62,
  92 #define RTM_GETANYCAST  RTM_GETANYCAST
  93
  94         RTM_NEWNEIGHTBL = 64,
  95 #define RTM_NEWNEIGHTBL RTM_NEWNEIGHTBL
  96         RTM_GETNEIGHTBL = 66,
  97 #define RTM_GETNEIGHTBL RTM_GETNEIGHTBL
  98         RTM_SETNEIGHTBL,
  99 #define RTM_SETNEIGHTBL RTM_SETNEIGHTBL
 100
 101         RTM_NEWNDUSEROPT = 68,
 102 #define RTM_NEWNDUSEROPT RTM_NEWNDUSEROPT
 103
 104         RTM_NEWADDRLABEL = 72,
 105 #define RTM_NEWADDRLABEL RTM_NEWADDRLABEL
 106         RTM_DELADDRLABEL,
 107 #define RTM_DELADDRLABEL RTM_DELADDRLABEL
 108         RTM_GETADDRLABEL,
 109 #define RTM_GETADDRLABEL RTM_GETADDRLABEL
 110
 111         RTM_GETDCB = 78,
 112 #define RTM_GETDCB RTM_GETDCB
 113         RTM_SETDCB,
 114 #define RTM_SETDCB RTM_SETDCB
 115
 116         __RTM_MAX,
 117 #define RTM_MAX         (((__RTM_MAX + 3) & ~3) - 1)
 118 };
 119
 120 #define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE)
 121 #define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2)
 122 #define RTM_FAM(cmd)    (((cmd) - RTM_BASE) >> 2)
 123
 124 /*
 125    Generic structure for encapsulation of optional route information.
 126    It is reminiscent of sockaddr, but with sa_family replaced
 127    with attribute type.
 128  */
 129
 130 struct rtattr
 131 {
 132         unsigned short  rta_len;
 133         unsigned short  rta_type;
 134 };
 135
 136 /* Macros to handle rtattributes */
 137
 138 #define RTA_ALIGNTO     4
 139 #define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) )
 140 #define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \
 141                          (rta)->rta_len >= sizeof(struct rtattr) && \
 142                          (rta)->rta_len <= (len))
 143 #define RTA_NEXT(rta,attrlen)   ((attrlen) -= RTA_ALIGN((rta)->rta_len), \
 144                                  (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
 145 #define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len))
 146 #define RTA_SPACE(len)  RTA_ALIGN(RTA_LENGTH(len))
 147 #define RTA_DATA(rta)   ((void*)(((char*)(rta)) + RTA_LENGTH(0)))
 148 #define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0))
 149
 150
 151
 152
 153 /******************************************************************************
 154  *              Definitions used in routing table administration.
 155  ****/
 156
 157 struct rtmsg
 158 {
 159         unsigned char           rtm_family;
 160         unsigned char           rtm_dst_len;
 161         unsigned char           rtm_src_len;
 162         unsigned char           rtm_tos;
 163
 164         unsigned char           rtm_table;      /* Routing table id */
 165         unsigned char           rtm_protocol;   /* Routing protocol; see below  */
 166         unsigned char           rtm_scope;      /* See below */
 167         unsigned char           rtm_type;       /* See below    */
 168
 169         unsigned                rtm_flags;
 170 };
 171
 172 /* rtm_type */
 173
 174 enum
 175 {
 176         RTN_UNSPEC,
 177         RTN_UNICAST,            /* Gateway or direct route      */
 178         RTN_LOCAL,              /* Accept locally               */
 179         RTN_BROADCAST,          /* Accept locally as broadcast,
 180                                    send as broadcast */
 181         RTN_ANYCAST,            /* Accept locally as broadcast,
 182                                    but send as unicast */
 183         RTN_MULTICAST,          /* Multicast route              */
 184         RTN_BLACKHOLE,          /* Drop                         */
 185         RTN_UNREACHABLE,        /* Destination is unreachable   */
 186         RTN_PROHIBIT,           /* Administratively prohibited  */
 187         RTN_THROW,              /* Not in this table            */
 188         RTN_NAT,                /* Translate this address       */
 189         RTN_XRESOLVE,           /* Use external resolver        */
 190         __RTN_MAX
 191 };
 192
 193 #define RTN_MAX (__RTN_MAX - 1)
 194
 195
 196 /* rtm_protocol */
 197
 198 #define RTPROT_UNSPEC   0
 199 #define RTPROT_REDIRECT 1       /* Route installed by ICMP redirects;
 200                                    not used by current IPv4 */
 201 #define RTPROT_KERNEL   2       /* Route installed by kernel            */
 202 #define RTPROT_BOOT     3       /* Route installed during boot          */
 203 #define RTPROT_STATIC   4       /* Route installed by administrator     */
 204
 205 /* Values of protocol >= RTPROT_STATIC are not interpreted by kernel;
 206    they are just passed from user and back as is.
 207    It will be used by hypothetical multiple routing daemons.
 208    Note that protocol values should be standardized in order to
 209    avoid conflicts.
 210  */
 211
 212 #define RTPROT_GATED    8       /* Apparently, GateD */
 213 #define RTPROT_RA       9       /* RDISC/ND router advertisements */
 214 #define RTPROT_MRT      10      /* Merit MRT */
 215 #define RTPROT_ZEBRA    11      /* Zebra */
 216 #define RTPROT_BIRD     12      /* BIRD */
 217 #define RTPROT_DNROUTED 13      /* DECnet routing daemon */
 218 #define RTPROT_XORP     14      /* XORP */
 219 #define RTPROT_NTK      15      /* Netsukuku */
 220 #define RTPROT_DHCP     16      /* DHCP client */
 221
 222 /* rtm_scope
 223
 224    Really it is not scope, but sort of distance to the destination.
 225    NOWHERE are reserved for not existing destinations, HOST is our
 226    local addresses, LINK are destinations, located on directly attached
 227    link and UNIVERSE is everywhere in the Universe.
 228
 229    Intermediate values are also possible f.e. interior routes
 230    could be assigned a value between UNIVERSE and LINK.
 231 */
 232
 233 enum rt_scope_t
 234 {
 235         RT_SCOPE_UNIVERSE=0,
 236 /* User defined values  */
 237         RT_SCOPE_SITE=200,
 238         RT_SCOPE_LINK=253,
 239         RT_SCOPE_HOST=254,
 240         RT_SCOPE_NOWHERE=255
 241 };
 242
 243 /* rtm_flags */
 244
 245 #define RTM_F_NOTIFY            0x100   /* Notify user of route change  */
 246 #define RTM_F_CLONED            0x200   /* This route is cloned         */
 247 #define RTM_F_EQUALIZE          0x400   /* Multipath equalizer: NI      */
 248 #define RTM_F_PREFIX            0x800   /* Prefix addresses             */
 249
 250 /* Reserved table identifiers */
 251
 252 enum rt_class_t
 253 {
 254         RT_TABLE_UNSPEC=0,
 255 /* User defined values */
 256         RT_TABLE_COMPAT=252,
 257         RT_TABLE_DEFAULT=253,
 258         RT_TABLE_MAIN=254,
 259         RT_TABLE_LOCAL=255,
 260         RT_TABLE_MAX=0xFFFFFFFF
 261 };
 262
 263
 264 /* Routing message attributes */
 265
 266 enum rtattr_type_t
 267 {
 268         RTA_UNSPEC,
 269         RTA_DST,
 270         RTA_SRC,
 271         RTA_IIF,
 272         RTA_OIF,
 273         RTA_GATEWAY,
 274         RTA_PRIORITY,
 275         RTA_PREFSRC,
 276         RTA_METRICS,
 277         RTA_MULTIPATH,
 278         RTA_PROTOINFO, /* no longer used */
 279         RTA_FLOW,
 280         RTA_CACHEINFO,
 281         RTA_SESSION, /* no longer used */
 282         RTA_MP_ALGO, /* no longer used */
 283         RTA_TABLE,
 284         __RTA_MAX
 285 };
 286
 287 #define RTA_MAX (__RTA_MAX - 1)
 288
 289 #define RTM_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
 290 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
 291
 292 /* RTM_MULTIPATH --- array of struct rtnexthop.
 293  *
 294  * "struct rtnexthop" describes all necessary nexthop information,
 295  * i.e. parameters of path to a destination via this nexthop.
 296  *
 297  * At the moment it is impossible to set different prefsrc, mtu, window
 298  * and rtt for different paths from multipath.
 299  */
 300
 301 struct rtnexthop
 302 {
 303         unsigned short          rtnh_len;
 304         unsigned char           rtnh_flags;
 305         unsigned char           rtnh_hops;
 306         int                     rtnh_ifindex;
 307 };
 308
 309 /* rtnh_flags */
 310
 311 #define RTNH_F_DEAD             1       /* Nexthop is dead (used by multipath)  */
 312 #define RTNH_F_PERVASIVE        2       /* Do recursive gateway lookup  */
 313 #define RTNH_F_ONLINK           4       /* Gateway is forced on link    */
 314
 315 /* Macros to handle hexthops */
 316
 317 #define RTNH_ALIGNTO    4
 318 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) )
 319 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \
 320                            ((int)(rtnh)->rtnh_len) <= (len))
 321 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len)))
 322 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len))
 323 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len))
 324 #define RTNH_DATA(rtnh)   ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0)))
 325
 326 /* RTM_CACHEINFO */
 327
 328 struct rta_cacheinfo
 329 {
 330         __u32   rta_clntref;
 331         __u32   rta_lastuse;
 332         __s32   rta_expires;
 333         __u32   rta_error;
 334         __u32   rta_used;
 335
 336 #define RTNETLINK_HAVE_PEERINFO 1
 337         __u32   rta_id;
 338         __u32   rta_ts;
 339         __u32   rta_tsage;
 340 };
 341
 342 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
 343
 344 enum
 345 {
 346         RTAX_UNSPEC,
 347 #define RTAX_UNSPEC RTAX_UNSPEC
 348         RTAX_LOCK,
 349 #define RTAX_LOCK RTAX_LOCK
 350         RTAX_MTU,
 351 #define RTAX_MTU RTAX_MTU
 352         RTAX_WINDOW,
 353 #define RTAX_WINDOW RTAX_WINDOW
 354         RTAX_RTT,
 355 #define RTAX_RTT RTAX_RTT
 356         RTAX_RTTVAR,
 357 #define RTAX_RTTVAR RTAX_RTTVAR
 358         RTAX_SSTHRESH,
 359 #define RTAX_SSTHRESH RTAX_SSTHRESH
 360         RTAX_CWND,
 361 #define RTAX_CWND RTAX_CWND
 362         RTAX_ADVMSS,
 363 #define RTAX_ADVMSS RTAX_ADVMSS
 364         RTAX_REORDERING,
 365 #define RTAX_REORDERING RTAX_REORDERING
 366         RTAX_HOPLIMIT,
 367 #define RTAX_HOPLIMIT RTAX_HOPLIMIT
 368         RTAX_INITCWND,
 369 #define RTAX_INITCWND RTAX_INITCWND
 370         RTAX_FEATURES,
 371 #define RTAX_FEATURES RTAX_FEATURES
 372         RTAX_RTO_MIN,
 373 #define RTAX_RTO_MIN RTAX_RTO_MIN
 374         __RTAX_MAX
 375 };
 376
 377 #define RTAX_MAX (__RTAX_MAX - 1)
 378
 379 #define RTAX_FEATURE_ECN        0x00000001
 380 #define RTAX_FEATURE_SACK       0x00000002
 381 #define RTAX_FEATURE_TIMESTAMP  0x00000004
 382 #define RTAX_FEATURE_ALLFRAG    0x00000008
 383
 384 struct rta_session
 385 {
 386         __u8    proto;
 387         __u8    pad1;
 388         __u16   pad2;
 389
 390         union {
 391                 struct {
 392                         __u16   sport;
 393                         __u16   dport;
 394                 } ports;
 395
 396                 struct {
 397                         __u8    type;
 398                         __u8    code;
 399                         __u16   ident;
 400                 } icmpt;
 401
 402                 __u32           spi;
 403         } u;
 404 };
 405
 406 /****
 407  *              General form of address family dependent message.
 408  ****/
 409
 410 struct rtgenmsg
 411 {
 412         unsigned char           rtgen_family;
 413 };
 414
 415 /*****************************************************************
 416  *              Link layer specific messages.
 417  ****/
 418
 419 /* struct ifinfomsg
 420  * passes link level specific information, not dependent
 421  * on network protocol.
 422  */
 423
 424 struct ifinfomsg
 425 {
 426         unsigned char   ifi_family;
 427         unsigned char   __ifi_pad;
 428         unsigned short  ifi_type;               /* ARPHRD_* */
 429         int             ifi_index;              /* Link index   */
 430         unsigned        ifi_flags;              /* IFF_* flags  */
 431         unsigned        ifi_change;             /* IFF_* change mask */
 432 };
 433
 434 /********************************************************************
 435  *              prefix information
 436  ****/
 437
 438 struct prefixmsg
 439 {
 440         unsigned char   prefix_family;
 441         unsigned char   prefix_pad1;
 442         unsigned short  prefix_pad2;
 443         int             prefix_ifindex;
 444         unsigned char   prefix_type;
 445         unsigned char   prefix_len;
 446         unsigned char   prefix_flags;
 447         unsigned char   prefix_pad3;
 448 };
 449
 450 enum
 451 {
 452         PREFIX_UNSPEC,
 453         PREFIX_ADDRESS,
 454         PREFIX_CACHEINFO,
 455         __PREFIX_MAX
 456 };
 457
 458 #define PREFIX_MAX      (__PREFIX_MAX - 1)
 459
 460 struct prefix_cacheinfo
 461 {
 462         __u32   preferred_time;
 463         __u32   valid_time;
 464 };
 465
 466
 467 /*****************************************************************
 468  *              Traffic control messages.
 469  ****/
 470
 471 struct tcmsg
 472 {
 473         unsigned char   tcm_family;
 474         unsigned char   tcm__pad1;
 475         unsigned short  tcm__pad2;
 476         int             tcm_ifindex;
 477         __u32           tcm_handle;
 478         __u32           tcm_parent;
 479         __u32           tcm_info;
 480 };
 481
 482 enum
 483 {
 484         TCA_UNSPEC,
 485         TCA_KIND,
 486         TCA_OPTIONS,
 487         TCA_STATS,
 488         TCA_XSTATS,
 489         TCA_RATE,
 490         TCA_FCNT,
 491         TCA_STATS2,
 492         TCA_STAB,
 493         __TCA_MAX
 494 };
 495
 496 #define TCA_MAX (__TCA_MAX - 1)
 497
 498 #define TCA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
 499 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
 500
 501 /********************************************************************
 502  *              Neighbor Discovery userland options
 503  ****/
 504
 505 struct nduseroptmsg
 506 {
 507         unsigned char   nduseropt_family;
 508         unsigned char   nduseropt_pad1;
 509         unsigned short  nduseropt_opts_len;     /* Total length of options */
 510         int             nduseropt_ifindex;
 511         __u8            nduseropt_icmp_type;
 512         __u8            nduseropt_icmp_code;
 513         unsigned short  nduseropt_pad2;
 514         unsigned int    nduseropt_pad3;
 515         /* Followed by one or more ND options */
 516 };
 517
 518 enum
 519 {
 520         NDUSEROPT_UNSPEC,
 521         NDUSEROPT_SRCADDR,
 522         __NDUSEROPT_MAX
 523 };
 524
 525 #define NDUSEROPT_MAX   (__NDUSEROPT_MAX - 1)
 526
 527 #ifndef __KERNEL__
 528 /* RTnetlink multicast groups - backwards compatibility for userspace */
 529 #define RTMGRP_LINK             1
 530 #define RTMGRP_NOTIFY           2
 531 #define RTMGRP_NEIGH            4
 532 #define RTMGRP_TC               8
 533
 534 #define RTMGRP_IPV4_IFADDR      0x10
 535 #define RTMGRP_IPV4_MROUTE      0x20
 536 #define RTMGRP_IPV4_ROUTE       0x40
 537 #define RTMGRP_IPV4_RULE        0x80
 538
 539 #define RTMGRP_IPV6_IFADDR      0x100
 540 #define RTMGRP_IPV6_MROUTE      0x200
 541 #define RTMGRP_IPV6_ROUTE       0x400
 542 #define RTMGRP_IPV6_IFINFO      0x800
 543
 544 #define RTMGRP_DECnet_IFADDR    0x1000
 545 #define RTMGRP_DECnet_ROUTE     0x4000
 546
 547 #define RTMGRP_IPV6_PREFIX      0x20000
 548 #endif
 549
 550 /* RTnetlink multicast groups */
 551 enum rtnetlink_groups {
 552         RTNLGRP_NONE,
 553 #define RTNLGRP_NONE            RTNLGRP_NONE
 554         RTNLGRP_LINK,
 555 #define RTNLGRP_LINK            RTNLGRP_LINK
 556         RTNLGRP_NOTIFY,
 557 #define RTNLGRP_NOTIFY          RTNLGRP_NOTIFY
 558         RTNLGRP_NEIGH,
 559 #define RTNLGRP_NEIGH           RTNLGRP_NEIGH
 560         RTNLGRP_TC,
 561 #define RTNLGRP_TC              RTNLGRP_TC
 562         RTNLGRP_IPV4_IFADDR,
 563 #define RTNLGRP_IPV4_IFADDR     RTNLGRP_IPV4_IFADDR
 564         RTNLGRP_IPV4_MROUTE,
 565 #define RTNLGRP_IPV4_MROUTE     RTNLGRP_IPV4_MROUTE
 566         RTNLGRP_IPV4_ROUTE,
 567 #define RTNLGRP_IPV4_ROUTE      RTNLGRP_IPV4_ROUTE
 568         RTNLGRP_IPV4_RULE,
 569 #define RTNLGRP_IPV4_RULE       RTNLGRP_IPV4_RULE
 570         RTNLGRP_IPV6_IFADDR,
 571 #define RTNLGRP_IPV6_IFADDR     RTNLGRP_IPV6_IFADDR
 572         RTNLGRP_IPV6_MROUTE,
 573 #define RTNLGRP_IPV6_MROUTE     RTNLGRP_IPV6_MROUTE
 574         RTNLGRP_IPV6_ROUTE,
 575 #define RTNLGRP_IPV6_ROUTE      RTNLGRP_IPV6_ROUTE
 576         RTNLGRP_IPV6_IFINFO,
 577 #define RTNLGRP_IPV6_IFINFO     RTNLGRP_IPV6_IFINFO
 578         RTNLGRP_DECnet_IFADDR,
 579 #define RTNLGRP_DECnet_IFADDR   RTNLGRP_DECnet_IFADDR
 580         RTNLGRP_NOP2,
 581         RTNLGRP_DECnet_ROUTE,
 582 #define RTNLGRP_DECnet_ROUTE    RTNLGRP_DECnet_ROUTE
 583         RTNLGRP_DECnet_RULE,
 584 #define RTNLGRP_DECnet_RULE     RTNLGRP_DECnet_RULE
 585         RTNLGRP_NOP4,
 586         RTNLGRP_IPV6_PREFIX,
 587 #define RTNLGRP_IPV6_PREFIX     RTNLGRP_IPV6_PREFIX
 588         RTNLGRP_IPV6_RULE,
 589 #define RTNLGRP_IPV6_RULE       RTNLGRP_IPV6_RULE
 590         RTNLGRP_ND_USEROPT,
 591 #define RTNLGRP_ND_USEROPT      RTNLGRP_ND_USEROPT
 592         RTNLGRP_PHONET_IFADDR,
 593 #define RTNLGRP_PHONET_IFADDR   RTNLGRP_PHONET_IFADDR
 594         RTNLGRP_PHONET_ROUTE,
 595 #define RTNLGRP_PHONET_ROUTE    RTNLGRP_PHONET_ROUTE
 596         __RTNLGRP_MAX
 597 };
 598 #define RTNLGRP_MAX     (__RTNLGRP_MAX - 1)
 599
 600 /* TC action piece */
 601 struct tcamsg
 602 {
 603         unsigned char   tca_family;
 604         unsigned char   tca__pad1;
 605         unsigned short  tca__pad2;
 606 };
 607 #define TA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
 608 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
 609 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
 610 #define TCAA_MAX 1
 611
 612 /* End of information exported to user level */
 613
 614 #ifdef __KERNEL__
 615
 616 #include <linux/mutex.h>
 617
 618 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
 619 {
 620         int len = strlen(str) + 1;
 621         return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
 622 }
 623
 624 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
 625 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
 626 extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
 627                         u32 group, struct nlmsghdr *nlh, gfp_t flags);
 628 extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
 629 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
 630 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
 631                               u32 id, u32 ts, u32 tsage, long expires,
 632                               u32 error);
 633
 634 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
 635
 636 #define RTA_PUT(skb, attrtype, attrlen, data) \
 637 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
 638                  goto rtattr_failure; \
 639         __rta_fill(skb, attrtype, attrlen, data); })
 640
 641 #define RTA_APPEND(skb, attrlen, data) \
 642 ({      if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
 643                 goto rtattr_failure; \
 644         memcpy(skb_put(skb, attrlen), data, attrlen); })
 645
 646 #define RTA_PUT_NOHDR(skb, attrlen, data) \
 647 ({      RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \
 648         memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \
 649                RTA_ALIGN(attrlen) - attrlen); })
 650
 651 #define RTA_PUT_U8(skb, attrtype, value) \
 652 ({      u8 _tmp = (value); \
 653         RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })
 654
 655 #define RTA_PUT_U16(skb, attrtype, value) \
 656 ({      u16 _tmp = (value); \
 657         RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })
 658
 659 #define RTA_PUT_U32(skb, attrtype, value) \
 660 ({      u32 _tmp = (value); \
 661         RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
 662
 663 #define RTA_PUT_U64(skb, attrtype, value) \
 664 ({      u64 _tmp = (value); \
 665         RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
 666
 667 #define RTA_PUT_SECS(skb, attrtype, value) \
 668         RTA_PUT_U64(skb, attrtype, (value) / HZ)
 669
 670 #define RTA_PUT_MSECS(skb, attrtype, value) \
 671         RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
 672
 673 #define RTA_PUT_STRING(skb, attrtype, value) \
 674         RTA_PUT(skb, attrtype, strlen(value) + 1, value)
 675
 676 #define RTA_PUT_FLAG(skb, attrtype) \
 677         RTA_PUT(skb, attrtype, 0, NULL);
 678
 679 #define RTA_NEST(skb, type) \
 680 ({      struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
 681         RTA_PUT(skb, type, 0, NULL); \
 682         __start;  })
 683
 684 #define RTA_NEST_END(skb, start) \
 685 ({      (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
 686         (skb)->len; })
 687
 688 #define RTA_NEST_COMPAT(skb, type, attrlen, data) \
 689 ({      struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
 690         RTA_PUT(skb, type, attrlen, data); \
 691         RTA_NEST(skb, type); \
 692         __start; })
 693
 694 #define RTA_NEST_COMPAT_END(skb, start) \
 695 ({      struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \
 696         (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
 697         RTA_NEST_END(skb, __nest); \
 698         (skb)->len; })
 699
 700 #define RTA_NEST_CANCEL(skb, start) \
 701 ({      if (start) \
 702                 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
 703         -1; })
 704
 705 #define RTA_GET_U8(rta) \
 706 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
 707                 goto rtattr_failure; \
 708         *(u8 *) RTA_DATA(rta); })
 709
 710 #define RTA_GET_U16(rta) \
 711 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
 712                 goto rtattr_failure; \
 713         *(u16 *) RTA_DATA(rta); })
 714
 715 #define RTA_GET_U32(rta) \
 716 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
 717                 goto rtattr_failure; \
 718         *(u32 *) RTA_DATA(rta); })
 719
 720 #define RTA_GET_U64(rta) \
 721 ({      u64 _tmp; \
 722         if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
 723                 goto rtattr_failure; \
 724         memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
 725         _tmp; })
 726
 727 #define RTA_GET_FLAG(rta) (!!(rta))
 728
 729 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
 730 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
 731
 732 static inline struct rtattr *
 733 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
 734 {
 735         struct rtattr *rta;
 736         int size = RTA_LENGTH(attrlen);
 737
 738         rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
 739         rta->rta_type = attrtype;
 740         rta->rta_len = size;
 741         memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
 742         return rta;
 743 }
 744
 745 #define __RTA_PUT(skb, attrtype, attrlen) \
 746 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
 747                 goto rtattr_failure; \
 748         __rta_reserve(skb, attrtype, attrlen); })
 749
 750 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
 751
 752 /* RTNL is used as a global lock for all changes to network configuration  */
 753 extern void rtnl_lock(void);
 754 extern void rtnl_unlock(void);
 755 extern int rtnl_trylock(void);
 756 extern int rtnl_is_locked(void);
 757
 758 extern void rtnetlink_init(void);
 759 extern void __rtnl_unlock(void);
 760
 761 #define ASSERT_RTNL() do { \
 762         if (unlikely(!rtnl_is_locked())) { \
 763                 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
 764                        __FILE__,  __LINE__); \
 765                 dump_stack(); \
 766         } \
 767 } while(0)
 768
 769 static inline u32 rtm_get_table(struct rtattr **rta, u8 table)
 770 {
 771         return RTA_GET_U32(rta[RTA_TABLE-1]);
 772 rtattr_failure:
 773         return table;
 774 }
 775
 776 #endif /* __KERNEL__ */
 777
 778
 779 #endif  /* __LINUX_RTNETLINK_H */