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_MARK,
 286         __RTA_MAX
 287 };
 288
 289 #define RTA_MAX (__RTA_MAX - 1)
 290
 291 #define RTM_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
 292 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
 293
 294 /* RTM_MULTIPATH --- array of struct rtnexthop.
 295  *
 296  * "struct rtnexthop" describes all necessary nexthop information,
 297  * i.e. parameters of path to a destination via this nexthop.
 298  *
 299  * At the moment it is impossible to set different prefsrc, mtu, window
 300  * and rtt for different paths from multipath.
 301  */
 302
 303 struct rtnexthop {
 304         unsigned short          rtnh_len;
 305         unsigned char           rtnh_flags;
 306         unsigned char           rtnh_hops;
 307         int                     rtnh_ifindex;
 308 };
 309
 310 /* rtnh_flags */
 311
 312 #define RTNH_F_DEAD             1       /* Nexthop is dead (used by multipath)  */
 313 #define RTNH_F_PERVASIVE        2       /* Do recursive gateway lookup  */
 314 #define RTNH_F_ONLINK           4       /* Gateway is forced on link    */
 315
 316 /* Macros to handle hexthops */
 317
 318 #define RTNH_ALIGNTO    4
 319 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) )
 320 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \
 321                            ((int)(rtnh)->rtnh_len) <= (len))
 322 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len)))
 323 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len))
 324 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len))
 325 #define RTNH_DATA(rtnh)   ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0)))
 326
 327 /* RTM_CACHEINFO */
 328
 329 struct rta_cacheinfo {
 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         RTAX_UNSPEC,
 346 #define RTAX_UNSPEC RTAX_UNSPEC
 347         RTAX_LOCK,
 348 #define RTAX_LOCK RTAX_LOCK
 349         RTAX_MTU,
 350 #define RTAX_MTU RTAX_MTU
 351         RTAX_WINDOW,
 352 #define RTAX_WINDOW RTAX_WINDOW
 353         RTAX_RTT,
 354 #define RTAX_RTT RTAX_RTT
 355         RTAX_RTTVAR,
 356 #define RTAX_RTTVAR RTAX_RTTVAR
 357         RTAX_SSTHRESH,
 358 #define RTAX_SSTHRESH RTAX_SSTHRESH
 359         RTAX_CWND,
 360 #define RTAX_CWND RTAX_CWND
 361         RTAX_ADVMSS,
 362 #define RTAX_ADVMSS RTAX_ADVMSS
 363         RTAX_REORDERING,
 364 #define RTAX_REORDERING RTAX_REORDERING
 365         RTAX_HOPLIMIT,
 366 #define RTAX_HOPLIMIT RTAX_HOPLIMIT
 367         RTAX_INITCWND,
 368 #define RTAX_INITCWND RTAX_INITCWND
 369         RTAX_FEATURES,
 370 #define RTAX_FEATURES RTAX_FEATURES
 371         RTAX_RTO_MIN,
 372 #define RTAX_RTO_MIN RTAX_RTO_MIN
 373         RTAX_INITRWND,
 374 #define RTAX_INITRWND RTAX_INITRWND
 375         __RTAX_MAX
 376 };
 377
 378 #define RTAX_MAX (__RTAX_MAX - 1)
 379
 380 #define RTAX_FEATURE_ECN        0x00000001
 381 #define RTAX_FEATURE_SACK       0x00000002
 382 #define RTAX_FEATURE_TIMESTAMP  0x00000004
 383 #define RTAX_FEATURE_ALLFRAG    0x00000008
 384
 385 struct rta_session {
 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         unsigned char           rtgen_family;
 412 };
 413
 414 /*****************************************************************
 415  *              Link layer specific messages.
 416  ****/
 417
 418 /* struct ifinfomsg
 419  * passes link level specific information, not dependent
 420  * on network protocol.
 421  */
 422
 423 struct ifinfomsg {
 424         unsigned char   ifi_family;
 425         unsigned char   __ifi_pad;
 426         unsigned short  ifi_type;               /* ARPHRD_* */
 427         int             ifi_index;              /* Link index   */
 428         unsigned        ifi_flags;              /* IFF_* flags  */
 429         unsigned        ifi_change;             /* IFF_* change mask */
 430 };
 431
 432 /********************************************************************
 433  *              prefix information
 434  ****/
 435
 436 struct prefixmsg {
 437         unsigned char   prefix_family;
 438         unsigned char   prefix_pad1;
 439         unsigned short  prefix_pad2;
 440         int             prefix_ifindex;
 441         unsigned char   prefix_type;
 442         unsigned char   prefix_len;
 443         unsigned char   prefix_flags;
 444         unsigned char   prefix_pad3;
 445 };
 446
 447 enum
 448 {
 449         PREFIX_UNSPEC,
 450         PREFIX_ADDRESS,
 451         PREFIX_CACHEINFO,
 452         __PREFIX_MAX
 453 };
 454
 455 #define PREFIX_MAX      (__PREFIX_MAX - 1)
 456
 457 struct prefix_cacheinfo {
 458         __u32   preferred_time;
 459         __u32   valid_time;
 460 };
 461
 462
 463 /*****************************************************************
 464  *              Traffic control messages.
 465  ****/
 466
 467 struct tcmsg {
 468         unsigned char   tcm_family;
 469         unsigned char   tcm__pad1;
 470         unsigned short  tcm__pad2;
 471         int             tcm_ifindex;
 472         __u32           tcm_handle;
 473         __u32           tcm_parent;
 474         __u32           tcm_info;
 475 };
 476
 477 enum {
 478         TCA_UNSPEC,
 479         TCA_KIND,
 480         TCA_OPTIONS,
 481         TCA_STATS,
 482         TCA_XSTATS,
 483         TCA_RATE,
 484         TCA_FCNT,
 485         TCA_STATS2,
 486         TCA_STAB,
 487         __TCA_MAX
 488 };
 489
 490 #define TCA_MAX (__TCA_MAX - 1)
 491
 492 #define TCA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
 493 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
 494
 495 /********************************************************************
 496  *              Neighbor Discovery userland options
 497  ****/
 498
 499 struct nduseroptmsg {
 500         unsigned char   nduseropt_family;
 501         unsigned char   nduseropt_pad1;
 502         unsigned short  nduseropt_opts_len;     /* Total length of options */
 503         int             nduseropt_ifindex;
 504         __u8            nduseropt_icmp_type;
 505         __u8            nduseropt_icmp_code;
 506         unsigned short  nduseropt_pad2;
 507         unsigned int    nduseropt_pad3;
 508         /* Followed by one or more ND options */
 509 };
 510
 511 enum {
 512         NDUSEROPT_UNSPEC,
 513         NDUSEROPT_SRCADDR,
 514         __NDUSEROPT_MAX
 515 };
 516
 517 #define NDUSEROPT_MAX   (__NDUSEROPT_MAX - 1)
 518
 519 #ifndef __KERNEL__
 520 /* RTnetlink multicast groups - backwards compatibility for userspace */
 521 #define RTMGRP_LINK             1
 522 #define RTMGRP_NOTIFY           2
 523 #define RTMGRP_NEIGH            4
 524 #define RTMGRP_TC               8
 525
 526 #define RTMGRP_IPV4_IFADDR      0x10
 527 #define RTMGRP_IPV4_MROUTE      0x20
 528 #define RTMGRP_IPV4_ROUTE       0x40
 529 #define RTMGRP_IPV4_RULE        0x80
 530
 531 #define RTMGRP_IPV6_IFADDR      0x100
 532 #define RTMGRP_IPV6_MROUTE      0x200
 533 #define RTMGRP_IPV6_ROUTE       0x400
 534 #define RTMGRP_IPV6_IFINFO      0x800
 535
 536 #define RTMGRP_DECnet_IFADDR    0x1000
 537 #define RTMGRP_DECnet_ROUTE     0x4000
 538
 539 #define RTMGRP_IPV6_PREFIX      0x20000
 540 #endif
 541
 542 /* RTnetlink multicast groups */
 543 enum rtnetlink_groups {
 544         RTNLGRP_NONE,
 545 #define RTNLGRP_NONE            RTNLGRP_NONE
 546         RTNLGRP_LINK,
 547 #define RTNLGRP_LINK            RTNLGRP_LINK
 548         RTNLGRP_NOTIFY,
 549 #define RTNLGRP_NOTIFY          RTNLGRP_NOTIFY
 550         RTNLGRP_NEIGH,
 551 #define RTNLGRP_NEIGH           RTNLGRP_NEIGH
 552         RTNLGRP_TC,
 553 #define RTNLGRP_TC              RTNLGRP_TC
 554         RTNLGRP_IPV4_IFADDR,
 555 #define RTNLGRP_IPV4_IFADDR     RTNLGRP_IPV4_IFADDR
 556         RTNLGRP_IPV4_MROUTE,
 557 #define RTNLGRP_IPV4_MROUTE     RTNLGRP_IPV4_MROUTE
 558         RTNLGRP_IPV4_ROUTE,
 559 #define RTNLGRP_IPV4_ROUTE      RTNLGRP_IPV4_ROUTE
 560         RTNLGRP_IPV4_RULE,
 561 #define RTNLGRP_IPV4_RULE       RTNLGRP_IPV4_RULE
 562         RTNLGRP_IPV6_IFADDR,
 563 #define RTNLGRP_IPV6_IFADDR     RTNLGRP_IPV6_IFADDR
 564         RTNLGRP_IPV6_MROUTE,
 565 #define RTNLGRP_IPV6_MROUTE     RTNLGRP_IPV6_MROUTE
 566         RTNLGRP_IPV6_ROUTE,
 567 #define RTNLGRP_IPV6_ROUTE      RTNLGRP_IPV6_ROUTE
 568         RTNLGRP_IPV6_IFINFO,
 569 #define RTNLGRP_IPV6_IFINFO     RTNLGRP_IPV6_IFINFO
 570         RTNLGRP_DECnet_IFADDR,
 571 #define RTNLGRP_DECnet_IFADDR   RTNLGRP_DECnet_IFADDR
 572         RTNLGRP_NOP2,
 573         RTNLGRP_DECnet_ROUTE,
 574 #define RTNLGRP_DECnet_ROUTE    RTNLGRP_DECnet_ROUTE
 575         RTNLGRP_DECnet_RULE,
 576 #define RTNLGRP_DECnet_RULE     RTNLGRP_DECnet_RULE
 577         RTNLGRP_NOP4,
 578         RTNLGRP_IPV6_PREFIX,
 579 #define RTNLGRP_IPV6_PREFIX     RTNLGRP_IPV6_PREFIX
 580         RTNLGRP_IPV6_RULE,
 581 #define RTNLGRP_IPV6_RULE       RTNLGRP_IPV6_RULE
 582         RTNLGRP_ND_USEROPT,
 583 #define RTNLGRP_ND_USEROPT      RTNLGRP_ND_USEROPT
 584         RTNLGRP_PHONET_IFADDR,
 585 #define RTNLGRP_PHONET_IFADDR   RTNLGRP_PHONET_IFADDR
 586         RTNLGRP_PHONET_ROUTE,
 587 #define RTNLGRP_PHONET_ROUTE    RTNLGRP_PHONET_ROUTE
 588         __RTNLGRP_MAX
 589 };
 590 #define RTNLGRP_MAX     (__RTNLGRP_MAX - 1)
 591
 592 /* TC action piece */
 593 struct tcamsg {
 594         unsigned char   tca_family;
 595         unsigned char   tca__pad1;
 596         unsigned short  tca__pad2;
 597 };
 598 #define TA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
 599 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
 600 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
 601 #define TCAA_MAX 1
 602
 603 /* End of information exported to user level */
 604
 605 #ifdef __KERNEL__
 606
 607 #include <linux/mutex.h>
 608 #include <linux/netdevice.h>
 609
 610 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
 611 {
 612         int len = strlen(str) + 1;
 613         return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
 614 }
 615
 616 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
 617 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
 618 extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
 619                         u32 group, struct nlmsghdr *nlh, gfp_t flags);
 620 extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
 621 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
 622 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
 623                               u32 id, u32 ts, u32 tsage, long expires,
 624                               u32 error);
 625
 626 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
 627
 628 #define RTA_PUT(skb, attrtype, attrlen, data) \
 629 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
 630                  goto rtattr_failure; \
 631         __rta_fill(skb, attrtype, attrlen, data); })
 632
 633 #define RTA_APPEND(skb, attrlen, data) \
 634 ({      if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
 635                 goto rtattr_failure; \
 636         memcpy(skb_put(skb, attrlen), data, attrlen); })
 637
 638 #define RTA_PUT_NOHDR(skb, attrlen, data) \
 639 ({      RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \
 640         memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \
 641                RTA_ALIGN(attrlen) - attrlen); })
 642
 643 #define RTA_PUT_U8(skb, attrtype, value) \
 644 ({      u8 _tmp = (value); \
 645         RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })
 646
 647 #define RTA_PUT_U16(skb, attrtype, value) \
 648 ({      u16 _tmp = (value); \
 649         RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })
 650
 651 #define RTA_PUT_U32(skb, attrtype, value) \
 652 ({      u32 _tmp = (value); \
 653         RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
 654
 655 #define RTA_PUT_U64(skb, attrtype, value) \
 656 ({      u64 _tmp = (value); \
 657         RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
 658
 659 #define RTA_PUT_SECS(skb, attrtype, value) \
 660         RTA_PUT_U64(skb, attrtype, (value) / HZ)
 661
 662 #define RTA_PUT_MSECS(skb, attrtype, value) \
 663         RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
 664
 665 #define RTA_PUT_STRING(skb, attrtype, value) \
 666         RTA_PUT(skb, attrtype, strlen(value) + 1, value)
 667
 668 #define RTA_PUT_FLAG(skb, attrtype) \
 669         RTA_PUT(skb, attrtype, 0, NULL);
 670
 671 #define RTA_NEST(skb, type) \
 672 ({      struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
 673         RTA_PUT(skb, type, 0, NULL); \
 674         __start;  })
 675
 676 #define RTA_NEST_END(skb, start) \
 677 ({      (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
 678         (skb)->len; })
 679
 680 #define RTA_NEST_COMPAT(skb, type, attrlen, data) \
 681 ({      struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
 682         RTA_PUT(skb, type, attrlen, data); \
 683         RTA_NEST(skb, type); \
 684         __start; })
 685
 686 #define RTA_NEST_COMPAT_END(skb, start) \
 687 ({      struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \
 688         (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
 689         RTA_NEST_END(skb, __nest); \
 690         (skb)->len; })
 691
 692 #define RTA_NEST_CANCEL(skb, start) \
 693 ({      if (start) \
 694                 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
 695         -1; })
 696
 697 #define RTA_GET_U8(rta) \
 698 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
 699                 goto rtattr_failure; \
 700         *(u8 *) RTA_DATA(rta); })
 701
 702 #define RTA_GET_U16(rta) \
 703 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
 704                 goto rtattr_failure; \
 705         *(u16 *) RTA_DATA(rta); })
 706
 707 #define RTA_GET_U32(rta) \
 708 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
 709                 goto rtattr_failure; \
 710         *(u32 *) RTA_DATA(rta); })
 711
 712 #define RTA_GET_U64(rta) \
 713 ({      u64 _tmp; \
 714         if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
 715                 goto rtattr_failure; \
 716         memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
 717         _tmp; })
 718
 719 #define RTA_GET_FLAG(rta) (!!(rta))
 720
 721 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
 722 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
 723
 724 static inline struct rtattr *
 725 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
 726 {
 727         struct rtattr *rta;
 728         int size = RTA_LENGTH(attrlen);
 729
 730         rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
 731         rta->rta_type = attrtype;
 732         rta->rta_len = size;
 733         memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
 734         return rta;
 735 }
 736
 737 #define __RTA_PUT(skb, attrtype, attrlen) \
 738 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
 739                 goto rtattr_failure; \
 740         __rta_reserve(skb, attrtype, attrlen); })
 741
 742 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
 743
 744 /* RTNL is used as a global lock for all changes to network configuration  */
 745 extern void rtnl_lock(void);
 746 extern void rtnl_unlock(void);
 747 extern int rtnl_trylock(void);
 748 extern int rtnl_is_locked(void);
 749 #ifdef CONFIG_PROVE_LOCKING
 750 extern int lockdep_rtnl_is_held(void);
 751 #endif /* #ifdef CONFIG_PROVE_LOCKING */
 752
 753 /**
 754  * rcu_dereference_rtnl - rcu_dereference with debug checking
 755  * @p: The pointer to read, prior to dereferencing
 756  *
 757  * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
 758  * or RTNL. Note : Please prefer rtnl_dereference() or rcu_dereference()
 759  */
 760 #define rcu_dereference_rtnl(p)                                 \
 761         rcu_dereference_check(p, lockdep_rtnl_is_held())
 762
 763 /**
 764  * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
 765  * @p: The pointer to read, prior to dereferencing
 766  *
 767  * Return the value of the specified RCU-protected pointer, but omit
 768  * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because
 769  * caller holds RTNL.
 770  */
 771 #define rtnl_dereference(p)                                     \
 772         rcu_dereference_protected(p, lockdep_rtnl_is_held())
 773
 774 static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
 775 {
 776         return rtnl_dereference(dev->ingress_queue);
 777 }
 778
 779 extern struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
 780
 781 extern void rtnetlink_init(void);
 782 extern void __rtnl_unlock(void);
 783
 784 #define ASSERT_RTNL() do { \
 785         if (unlikely(!rtnl_is_locked())) { \
 786                 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
 787                        __FILE__,  __LINE__); \
 788                 dump_stack(); \
 789         } \
 790 } while(0)
 791
 792 static inline u32 rtm_get_table(struct rtattr **rta, u8 table)
 793 {
 794         return RTA_GET_U32(rta[RTA_TABLE-1]);
 795 rtattr_failure:
 796         return table;
 797 }
 798
 799 #endif /* __KERNEL__ */
 800
 801
 802 #endif  /* __LINUX_RTNETLINK_H */