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