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