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 /* rtnetlink families. Values up to 127 are reserved for real address
  11  * families, values above 128 may be used arbitrarily.
  12  */
  13 #define RTNL_FAMILY_IPMR                128
  14 #define RTNL_FAMILY_IP6MR               129
  15 #define RTNL_FAMILY_MAX                 129
  16
  17 /****
  18  *              Routing/neighbour discovery messages.
  19  ****/
  20
  21 /* Types of messages */
  22
  23 enum {
  24         RTM_BASE        = 16,
  25 #define RTM_BASE        RTM_BASE
  26
  27         RTM_NEWLINK     = 16,
  28 #define RTM_NEWLINK     RTM_NEWLINK
  29         RTM_DELLINK,
  30 #define RTM_DELLINK     RTM_DELLINK
  31         RTM_GETLINK,
  32 #define RTM_GETLINK     RTM_GETLINK
  33         RTM_SETLINK,
  34 #define RTM_SETLINK     RTM_SETLINK
  35
  36         RTM_NEWADDR     = 20,
  37 #define RTM_NEWADDR     RTM_NEWADDR
  38         RTM_DELADDR,
  39 #define RTM_DELADDR     RTM_DELADDR
  40         RTM_GETADDR,
  41 #define RTM_GETADDR     RTM_GETADDR
  42
  43         RTM_NEWROUTE    = 24,
  44 #define RTM_NEWROUTE    RTM_NEWROUTE
  45         RTM_DELROUTE,
  46 #define RTM_DELROUTE    RTM_DELROUTE
  47         RTM_GETROUTE,
  48 #define RTM_GETROUTE    RTM_GETROUTE
  49
  50         RTM_NEWNEIGH    = 28,
  51 #define RTM_NEWNEIGH    RTM_NEWNEIGH
  52         RTM_DELNEIGH,
  53 #define RTM_DELNEIGH    RTM_DELNEIGH
  54         RTM_GETNEIGH,
  55 #define RTM_GETNEIGH    RTM_GETNEIGH
  56
  57         RTM_NEWRULE     = 32,
  58 #define RTM_NEWRULE     RTM_NEWRULE
  59         RTM_DELRULE,
  60 #define RTM_DELRULE     RTM_DELRULE
  61         RTM_GETRULE,
  62 #define RTM_GETRULE     RTM_GETRULE
  63
  64         RTM_NEWQDISC    = 36,
  65 #define RTM_NEWQDISC    RTM_NEWQDISC
  66         RTM_DELQDISC,
  67 #define RTM_DELQDISC    RTM_DELQDISC
  68         RTM_GETQDISC,
  69 #define RTM_GETQDISC    RTM_GETQDISC
  70
  71         RTM_NEWTCLASS   = 40,
  72 #define RTM_NEWTCLASS   RTM_NEWTCLASS
  73         RTM_DELTCLASS,
  74 #define RTM_DELTCLASS   RTM_DELTCLASS
  75         RTM_GETTCLASS,
  76 #define RTM_GETTCLASS   RTM_GETTCLASS
  77
  78         RTM_NEWTFILTER  = 44,
  79 #define RTM_NEWTFILTER  RTM_NEWTFILTER
  80         RTM_DELTFILTER,
  81 #define RTM_DELTFILTER  RTM_DELTFILTER
  82         RTM_GETTFILTER,
  83 #define RTM_GETTFILTER  RTM_GETTFILTER
  84
  85         RTM_NEWACTION   = 48,
  86 #define RTM_NEWACTION   RTM_NEWACTION
  87         RTM_DELACTION,
  88 #define RTM_DELACTION   RTM_DELACTION
  89         RTM_GETACTION,
  90 #define RTM_GETACTION   RTM_GETACTION
  91
  92         RTM_NEWPREFIX   = 52,
  93 #define RTM_NEWPREFIX   RTM_NEWPREFIX
  94
  95         RTM_GETMULTICAST = 58,
  96 #define RTM_GETMULTICAST RTM_GETMULTICAST
  97
  98         RTM_GETANYCAST  = 62,
  99 #define RTM_GETANYCAST  RTM_GETANYCAST
 100
 101         RTM_NEWNEIGHTBL = 64,
 102 #define RTM_NEWNEIGHTBL RTM_NEWNEIGHTBL
 103         RTM_GETNEIGHTBL = 66,
 104 #define RTM_GETNEIGHTBL RTM_GETNEIGHTBL
 105         RTM_SETNEIGHTBL,
 106 #define RTM_SETNEIGHTBL RTM_SETNEIGHTBL
 107
 108         RTM_NEWNDUSEROPT = 68,
 109 #define RTM_NEWNDUSEROPT RTM_NEWNDUSEROPT
 110
 111         RTM_NEWADDRLABEL = 72,
 112 #define RTM_NEWADDRLABEL RTM_NEWADDRLABEL
 113         RTM_DELADDRLABEL,
 114 #define RTM_DELADDRLABEL RTM_DELADDRLABEL
 115         RTM_GETADDRLABEL,
 116 #define RTM_GETADDRLABEL RTM_GETADDRLABEL
 117
 118         RTM_GETDCB = 78,
 119 #define RTM_GETDCB RTM_GETDCB
 120         RTM_SETDCB,
 121 #define RTM_SETDCB RTM_SETDCB
 122
 123         __RTM_MAX,
 124 #define RTM_MAX         (((__RTM_MAX + 3) & ~3) - 1)
 125 };
 126
 127 #define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE)
 128 #define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2)
 129 #define RTM_FAM(cmd)    (((cmd) - RTM_BASE) >> 2)
 130
 131 /*
 132    Generic structure for encapsulation of optional route information.
 133    It is reminiscent of sockaddr, but with sa_family replaced
 134    with attribute type.
 135  */
 136
 137 struct rtattr {
 138         unsigned short  rta_len;
 139         unsigned short  rta_type;
 140 };
 141
 142 /* Macros to handle rtattributes */
 143
 144 #define RTA_ALIGNTO     4
 145 #define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) )
 146 #define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \
 147                          (rta)->rta_len >= sizeof(struct rtattr) && \
 148                          (rta)->rta_len <= (len))
 149 #define RTA_NEXT(rta,attrlen)   ((attrlen) -= RTA_ALIGN((rta)->rta_len), \
 150                                  (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
 151 #define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len))
 152 #define RTA_SPACE(len)  RTA_ALIGN(RTA_LENGTH(len))
 153 #define RTA_DATA(rta)   ((void*)(((char*)(rta)) + RTA_LENGTH(0)))
 154 #define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0))
 155
 156
 157
 158
 159 /******************************************************************************
 160  *              Definitions used in routing table administration.
 161  ****/
 162
 163 struct rtmsg {
 164         unsigned char           rtm_family;
 165         unsigned char           rtm_dst_len;
 166         unsigned char           rtm_src_len;
 167         unsigned char           rtm_tos;
 168
 169         unsigned char           rtm_table;      /* Routing table id */
 170         unsigned char           rtm_protocol;   /* Routing protocol; see below  */
 171         unsigned char           rtm_scope;      /* See below */
 172         unsigned char           rtm_type;       /* See below    */
 173
 174         unsigned                rtm_flags;
 175 };
 176
 177 /* rtm_type */
 178
 179 enum {
 180         RTN_UNSPEC,
 181         RTN_UNICAST,            /* Gateway or direct route      */
 182         RTN_LOCAL,              /* Accept locally               */
 183         RTN_BROADCAST,          /* Accept locally as broadcast,
 184                                    send as broadcast */
 185         RTN_ANYCAST,            /* Accept locally as broadcast,
 186                                    but send as unicast */
 187         RTN_MULTICAST,          /* Multicast route              */
 188         RTN_BLACKHOLE,          /* Drop                         */
 189         RTN_UNREACHABLE,        /* Destination is unreachable   */
 190         RTN_PROHIBIT,           /* Administratively prohibited  */
 191         RTN_THROW,              /* Not in this table            */
 192         RTN_NAT,                /* Translate this address       */
 193         RTN_XRESOLVE,           /* Use external resolver        */
 194         __RTN_MAX
 195 };
 196
 197 #define RTN_MAX (__RTN_MAX - 1)
 198
 199
 200 /* rtm_protocol */
 201
 202 #define RTPROT_UNSPEC   0
 203 #define RTPROT_REDIRECT 1       /* Route installed by ICMP redirects;
 204                                    not used by current IPv4 */
 205 #define RTPROT_KERNEL   2       /* Route installed by kernel            */
 206 #define RTPROT_BOOT     3       /* Route installed during boot          */
 207 #define RTPROT_STATIC   4       /* Route installed by administrator     */
 208
 209 /* Values of protocol >= RTPROT_STATIC are not interpreted by kernel;
 210    they are just passed from user and back as is.
 211    It will be used by hypothetical multiple routing daemons.
 212    Note that protocol values should be standardized in order to
 213    avoid conflicts.
 214  */
 215
 216 #define RTPROT_GATED    8       /* Apparently, GateD */
 217 #define RTPROT_RA       9       /* RDISC/ND router advertisements */
 218 #define RTPROT_MRT      10      /* Merit MRT */
 219 #define RTPROT_ZEBRA    11      /* Zebra */
 220 #define RTPROT_BIRD     12      /* BIRD */
 221 #define RTPROT_DNROUTED 13      /* DECnet routing daemon */
 222 #define RTPROT_XORP     14      /* XORP */
 223 #define RTPROT_NTK      15      /* Netsukuku */
 224 #define RTPROT_DHCP     16      /* DHCP client */
 225
 226 /* rtm_scope
 227
 228    Really it is not scope, but sort of distance to the destination.
 229    NOWHERE are reserved for not existing destinations, HOST is our
 230    local addresses, LINK are destinations, located on directly attached
 231    link and UNIVERSE is everywhere in the Universe.
 232
 233    Intermediate values are also possible f.e. interior routes
 234    could be assigned a value between UNIVERSE and LINK.
 235 */
 236
 237 enum rt_scope_t {
 238         RT_SCOPE_UNIVERSE=0,
 239 /* User defined values  */
 240         RT_SCOPE_SITE=200,
 241         RT_SCOPE_LINK=253,
 242         RT_SCOPE_HOST=254,
 243         RT_SCOPE_NOWHERE=255
 244 };
 245
 246 /* rtm_flags */
 247
 248 #define RTM_F_NOTIFY            0x100   /* Notify user of route change  */
 249 #define RTM_F_CLONED            0x200   /* This route is cloned         */
 250 #define RTM_F_EQUALIZE          0x400   /* Multipath equalizer: NI      */
 251 #define RTM_F_PREFIX            0x800   /* Prefix addresses             */
 252
 253 /* Reserved table identifiers */
 254
 255 enum rt_class_t {
 256         RT_TABLE_UNSPEC=0,
 257 /* User defined values */
 258         RT_TABLE_COMPAT=252,
 259         RT_TABLE_DEFAULT=253,
 260         RT_TABLE_MAIN=254,
 261         RT_TABLE_LOCAL=255,
 262         RT_TABLE_MAX=0xFFFFFFFF
 263 };
 264
 265
 266 /* Routing message attributes */
 267
 268 enum rtattr_type_t {
 269         RTA_UNSPEC,
 270         RTA_DST,
 271         RTA_SRC,
 272         RTA_IIF,
 273         RTA_OIF,
 274         RTA_GATEWAY,
 275         RTA_PRIORITY,
 276         RTA_PREFSRC,
 277         RTA_METRICS,
 278         RTA_MULTIPATH,
 279         RTA_PROTOINFO, /* no longer used */
 280         RTA_FLOW,
 281         RTA_CACHEINFO,
 282         RTA_SESSION, /* no longer used */
 283         RTA_MP_ALGO, /* no longer used */
 284         RTA_TABLE,
 285         __RTA_MAX
 286 };
 287
 288 #define RTA_MAX (__RTA_MAX - 1)
 289
 290 #define RTM_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
 291 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
 292
 293 /* RTM_MULTIPATH --- array of struct rtnexthop.
 294  *
 295  * "struct rtnexthop" describes all necessary nexthop information,
 296  * i.e. parameters of path to a destination via this nexthop.
 297  *
 298  * At the moment it is impossible to set different prefsrc, mtu, window
 299  * and rtt for different paths from multipath.
 300  */
 301
 302 struct rtnexthop {
 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         __u32   rta_clntref;
 330         __u32   rta_lastuse;
 331         __s32   rta_expires;
 332         __u32   rta_error;
 333         __u32   rta_used;
 334
 335 #define RTNETLINK_HAVE_PEERINFO 1
 336         __u32   rta_id;
 337         __u32   rta_ts;
 338         __u32   rta_tsage;
 339 };
 340
 341 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
 342
 343 enum {
 344         RTAX_UNSPEC,
 345 #define RTAX_UNSPEC RTAX_UNSPEC
 346         RTAX_LOCK,
 347 #define RTAX_LOCK RTAX_LOCK
 348         RTAX_MTU,
 349 #define RTAX_MTU RTAX_MTU
 350         RTAX_WINDOW,
 351 #define RTAX_WINDOW RTAX_WINDOW
 352         RTAX_RTT,
 353 #define RTAX_RTT RTAX_RTT
 354         RTAX_RTTVAR,
 355 #define RTAX_RTTVAR RTAX_RTTVAR
 356         RTAX_SSTHRESH,
 357 #define RTAX_SSTHRESH RTAX_SSTHRESH
 358         RTAX_CWND,
 359 #define RTAX_CWND RTAX_CWND
 360         RTAX_ADVMSS,
 361 #define RTAX_ADVMSS RTAX_ADVMSS
 362         RTAX_REORDERING,
 363 #define RTAX_REORDERING RTAX_REORDERING
 364         RTAX_HOPLIMIT,
 365 #define RTAX_HOPLIMIT RTAX_HOPLIMIT
 366         RTAX_INITCWND,
 367 #define RTAX_INITCWND RTAX_INITCWND
 368         RTAX_FEATURES,
 369 #define RTAX_FEATURES RTAX_FEATURES
 370         RTAX_RTO_MIN,
 371 #define RTAX_RTO_MIN RTAX_RTO_MIN
 372         RTAX_INITRWND,
 373 #define RTAX_INITRWND RTAX_INITRWND
 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         __u8    proto;
 386         __u8    pad1;
 387         __u16   pad2;
 388
 389         union {
 390                 struct {
 391                         __u16   sport;
 392                         __u16   dport;
 393                 } ports;
 394
 395                 struct {
 396                         __u8    type;
 397                         __u8    code;
 398                         __u16   ident;
 399                 } icmpt;
 400
 401                 __u32           spi;
 402         } u;
 403 };
 404
 405 /****
 406  *              General form of address family dependent message.
 407  ****/
 408
 409 struct rtgenmsg {
 410         unsigned char           rtgen_family;
 411 };
 412
 413 /*****************************************************************
 414  *              Link layer specific messages.
 415  ****/
 416
 417 /* struct ifinfomsg
 418  * passes link level specific information, not dependent
 419  * on network protocol.
 420  */
 421
 422 struct ifinfomsg {
 423         unsigned char   ifi_family;
 424         unsigned char   __ifi_pad;
 425         unsigned short  ifi_type;               /* ARPHRD_* */
 426         int             ifi_index;              /* Link index   */
 427         unsigned        ifi_flags;              /* IFF_* flags  */
 428         unsigned        ifi_change;             /* IFF_* change mask */
 429 };
 430
 431 /********************************************************************
 432  *              prefix information
 433  ****/
 434
 435 struct prefixmsg {
 436         unsigned char   prefix_family;
 437         unsigned char   prefix_pad1;
 438         unsigned short  prefix_pad2;
 439         int             prefix_ifindex;
 440         unsigned char   prefix_type;
 441         unsigned char   prefix_len;
 442         unsigned char   prefix_flags;
 443         unsigned char   prefix_pad3;
 444 };
 445
 446 enum
 447 {
 448         PREFIX_UNSPEC,
 449         PREFIX_ADDRESS,
 450         PREFIX_CACHEINFO,
 451         __PREFIX_MAX
 452 };
 453
 454 #define PREFIX_MAX      (__PREFIX_MAX - 1)
 455
 456 struct prefix_cacheinfo {
 457         __u32   preferred_time;
 458         __u32   valid_time;
 459 };
 460
 461
 462 /*****************************************************************
 463  *              Traffic control messages.
 464  ****/
 465
 466 struct tcmsg {
 467         unsigned char   tcm_family;
 468         unsigned char   tcm__pad1;
 469         unsigned short  tcm__pad2;
 470         int             tcm_ifindex;
 471         __u32           tcm_handle;
 472         __u32           tcm_parent;
 473         __u32           tcm_info;
 474 };
 475
 476 enum {
 477         TCA_UNSPEC,
 478         TCA_KIND,
 479         TCA_OPTIONS,
 480         TCA_STATS,
 481         TCA_XSTATS,
 482         TCA_RATE,
 483         TCA_FCNT,
 484         TCA_STATS2,
 485         TCA_STAB,
 486         __TCA_MAX
 487 };
 488
 489 #define TCA_MAX (__TCA_MAX - 1)
 490
 491 #define TCA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
 492 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
 493
 494 /********************************************************************
 495  *              Neighbor Discovery userland options
 496  ****/
 497
 498 struct nduseroptmsg {
 499         unsigned char   nduseropt_family;
 500         unsigned char   nduseropt_pad1;
 501         unsigned short  nduseropt_opts_len;     /* Total length of options */
 502         int             nduseropt_ifindex;
 503         __u8            nduseropt_icmp_type;
 504         __u8            nduseropt_icmp_code;
 505         unsigned short  nduseropt_pad2;
 506         unsigned int    nduseropt_pad3;
 507         /* Followed by one or more ND options */
 508 };
 509
 510 enum {
 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_PHONET_IFADDR,
 584 #define RTNLGRP_PHONET_IFADDR   RTNLGRP_PHONET_IFADDR
 585         RTNLGRP_PHONET_ROUTE,
 586 #define RTNLGRP_PHONET_ROUTE    RTNLGRP_PHONET_ROUTE
 587         __RTNLGRP_MAX
 588 };
 589 #define RTNLGRP_MAX     (__RTNLGRP_MAX - 1)
 590
 591 /* TC action piece */
 592 struct tcamsg {
 593         unsigned char   tca_family;
 594         unsigned char   tca__pad1;
 595         unsigned short  tca__pad2;
 596 };
 597 #define TA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
 598 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
 599 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
 600 #define TCAA_MAX 1
 601
 602 /* End of information exported to user level */
 603
 604 #ifdef __KERNEL__
 605
 606 #include <linux/mutex.h>
 607
 608 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
 609 {
 610         int len = strlen(str) + 1;
 611         return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
 612 }
 613
 614 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
 615 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
 616 extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
 617                         u32 group, struct nlmsghdr *nlh, gfp_t flags);
 618 extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
 619 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
 620 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
 621                               u32 id, u32 ts, u32 tsage, long expires,
 622                               u32 error);
 623
 624 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
 625
 626 #define RTA_PUT(skb, attrtype, attrlen, data) \
 627 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
 628                  goto rtattr_failure; \
 629         __rta_fill(skb, attrtype, attrlen, data); })
 630
 631 #define RTA_APPEND(skb, attrlen, data) \
 632 ({      if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
 633                 goto rtattr_failure; \
 634         memcpy(skb_put(skb, attrlen), data, attrlen); })
 635
 636 #define RTA_PUT_NOHDR(skb, attrlen, data) \
 637 ({      RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \
 638         memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \
 639                RTA_ALIGN(attrlen) - attrlen); })
 640
 641 #define RTA_PUT_U8(skb, attrtype, value) \
 642 ({      u8 _tmp = (value); \
 643         RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })
 644
 645 #define RTA_PUT_U16(skb, attrtype, value) \
 646 ({      u16 _tmp = (value); \
 647         RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })
 648
 649 #define RTA_PUT_U32(skb, attrtype, value) \
 650 ({      u32 _tmp = (value); \
 651         RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
 652
 653 #define RTA_PUT_U64(skb, attrtype, value) \
 654 ({      u64 _tmp = (value); \
 655         RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
 656
 657 #define RTA_PUT_SECS(skb, attrtype, value) \
 658         RTA_PUT_U64(skb, attrtype, (value) / HZ)
 659
 660 #define RTA_PUT_MSECS(skb, attrtype, value) \
 661         RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
 662
 663 #define RTA_PUT_STRING(skb, attrtype, value) \
 664         RTA_PUT(skb, attrtype, strlen(value) + 1, value)
 665
 666 #define RTA_PUT_FLAG(skb, attrtype) \
 667         RTA_PUT(skb, attrtype, 0, NULL);
 668
 669 #define RTA_NEST(skb, type) \
 670 ({      struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
 671         RTA_PUT(skb, type, 0, NULL); \
 672         __start;  })
 673
 674 #define RTA_NEST_END(skb, start) \
 675 ({      (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
 676         (skb)->len; })
 677
 678 #define RTA_NEST_COMPAT(skb, type, attrlen, data) \
 679 ({      struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
 680         RTA_PUT(skb, type, attrlen, data); \
 681         RTA_NEST(skb, type); \
 682         __start; })
 683
 684 #define RTA_NEST_COMPAT_END(skb, start) \
 685 ({      struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \
 686         (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
 687         RTA_NEST_END(skb, __nest); \
 688         (skb)->len; })
 689
 690 #define RTA_NEST_CANCEL(skb, start) \
 691 ({      if (start) \
 692                 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
 693         -1; })
 694
 695 #define RTA_GET_U8(rta) \
 696 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
 697                 goto rtattr_failure; \
 698         *(u8 *) RTA_DATA(rta); })
 699
 700 #define RTA_GET_U16(rta) \
 701 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
 702                 goto rtattr_failure; \
 703         *(u16 *) RTA_DATA(rta); })
 704
 705 #define RTA_GET_U32(rta) \
 706 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
 707                 goto rtattr_failure; \
 708         *(u32 *) RTA_DATA(rta); })
 709
 710 #define RTA_GET_U64(rta) \
 711 ({      u64 _tmp; \
 712         if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
 713                 goto rtattr_failure; \
 714         memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
 715         _tmp; })
 716
 717 #define RTA_GET_FLAG(rta) (!!(rta))
 718
 719 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
 720 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
 721
 722 static inline struct rtattr *
 723 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
 724 {
 725         struct rtattr *rta;
 726         int size = RTA_LENGTH(attrlen);
 727
 728         rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
 729         rta->rta_type = attrtype;
 730         rta->rta_len = size;
 731         memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
 732         return rta;
 733 }
 734
 735 #define __RTA_PUT(skb, attrtype, attrlen) \
 736 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
 737                 goto rtattr_failure; \
 738         __rta_reserve(skb, attrtype, attrlen); })
 739
 740 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
 741
 742 /* RTNL is used as a global lock for all changes to network configuration  */
 743 extern void rtnl_lock(void);
 744 extern void rtnl_unlock(void);
 745 extern int rtnl_trylock(void);
 746 extern int rtnl_is_locked(void);
 747 #ifdef CONFIG_PROVE_LOCKING
 748 extern int lockdep_rtnl_is_held(void);
 749 #endif /* #ifdef CONFIG_PROVE_LOCKING */
 750
 751 extern void rtnetlink_init(void);
 752 extern void __rtnl_unlock(void);
 753
 754 #define ASSERT_RTNL() do { \
 755         if (unlikely(!rtnl_is_locked())) { \
 756                 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
 757                        __FILE__,  __LINE__); \
 758                 dump_stack(); \
 759         } \
 760 } while(0)
 761
 762 static inline u32 rtm_get_table(struct rtattr **rta, u8 table)
 763 {
 764         return RTA_GET_U32(rta[RTA_TABLE-1]);
 765 rtattr_failure:
 766         return table;
 767 }
 768
 769 #endif /* __KERNEL__ */
 770
 771
 772 #endif  /* __LINUX_RTNETLINK_H */