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 #include <linux/netdevice.h>
  10
  11 /* rtnetlink families. Values up to 127 are reserved for real address
  12  * families, values above 128 may be used arbitrarily.
  13  */
  14 #define RTNL_FAMILY_IPMR                128
  15 #define RTNL_FAMILY_IP6MR               129
  16 #define RTNL_FAMILY_MAX                 129
  17
  18 /****
  19  *              Routing/neighbour discovery messages.
  20  ****/
  21
  22 /* Types of messages */
  23
  24 enum {
  25         RTM_BASE        = 16,
  26 #define RTM_BASE        RTM_BASE
  27
  28         RTM_NEWLINK     = 16,
  29 #define RTM_NEWLINK     RTM_NEWLINK
  30         RTM_DELLINK,
  31 #define RTM_DELLINK     RTM_DELLINK
  32         RTM_GETLINK,
  33 #define RTM_GETLINK     RTM_GETLINK
  34         RTM_SETLINK,
  35 #define RTM_SETLINK     RTM_SETLINK
  36
  37         RTM_NEWADDR     = 20,
  38 #define RTM_NEWADDR     RTM_NEWADDR
  39         RTM_DELADDR,
  40 #define RTM_DELADDR     RTM_DELADDR
  41         RTM_GETADDR,
  42 #define RTM_GETADDR     RTM_GETADDR
  43
  44         RTM_NEWROUTE    = 24,
  45 #define RTM_NEWROUTE    RTM_NEWROUTE
  46         RTM_DELROUTE,
  47 #define RTM_DELROUTE    RTM_DELROUTE
  48         RTM_GETROUTE,
  49 #define RTM_GETROUTE    RTM_GETROUTE
  50
  51         RTM_NEWNEIGH    = 28,
  52 #define RTM_NEWNEIGH    RTM_NEWNEIGH
  53         RTM_DELNEIGH,
  54 #define RTM_DELNEIGH    RTM_DELNEIGH
  55         RTM_GETNEIGH,
  56 #define RTM_GETNEIGH    RTM_GETNEIGH
  57
  58         RTM_NEWRULE     = 32,
  59 #define RTM_NEWRULE     RTM_NEWRULE
  60         RTM_DELRULE,
  61 #define RTM_DELRULE     RTM_DELRULE
  62         RTM_GETRULE,
  63 #define RTM_GETRULE     RTM_GETRULE
  64
  65         RTM_NEWQDISC    = 36,
  66 #define RTM_NEWQDISC    RTM_NEWQDISC
  67         RTM_DELQDISC,
  68 #define RTM_DELQDISC    RTM_DELQDISC
  69         RTM_GETQDISC,
  70 #define RTM_GETQDISC    RTM_GETQDISC
  71
  72         RTM_NEWTCLASS   = 40,
  73 #define RTM_NEWTCLASS   RTM_NEWTCLASS
  74         RTM_DELTCLASS,
  75 #define RTM_DELTCLASS   RTM_DELTCLASS
  76         RTM_GETTCLASS,
  77 #define RTM_GETTCLASS   RTM_GETTCLASS
  78
  79         RTM_NEWTFILTER  = 44,
  80 #define RTM_NEWTFILTER  RTM_NEWTFILTER
  81         RTM_DELTFILTER,
  82 #define RTM_DELTFILTER  RTM_DELTFILTER
  83         RTM_GETTFILTER,
  84 #define RTM_GETTFILTER  RTM_GETTFILTER
  85
  86         RTM_NEWACTION   = 48,
  87 #define RTM_NEWACTION   RTM_NEWACTION
  88         RTM_DELACTION,
  89 #define RTM_DELACTION   RTM_DELACTION
  90         RTM_GETACTION,
  91 #define RTM_GETACTION   RTM_GETACTION
  92
  93         RTM_NEWPREFIX   = 52,
  94 #define RTM_NEWPREFIX   RTM_NEWPREFIX
  95
  96         RTM_GETMULTICAST = 58,
  97 #define RTM_GETMULTICAST RTM_GETMULTICAST
  98
  99         RTM_GETANYCAST  = 62,
 100 #define RTM_GETANYCAST  RTM_GETANYCAST
 101
 102         RTM_NEWNEIGHTBL = 64,
 103 #define RTM_NEWNEIGHTBL RTM_NEWNEIGHTBL
 104         RTM_GETNEIGHTBL = 66,
 105 #define RTM_GETNEIGHTBL RTM_GETNEIGHTBL
 106         RTM_SETNEIGHTBL,
 107 #define RTM_SETNEIGHTBL RTM_SETNEIGHTBL
 108
 109         RTM_NEWNDUSEROPT = 68,
 110 #define RTM_NEWNDUSEROPT RTM_NEWNDUSEROPT
 111
 112         RTM_NEWADDRLABEL = 72,
 113 #define RTM_NEWADDRLABEL RTM_NEWADDRLABEL
 114         RTM_DELADDRLABEL,
 115 #define RTM_DELADDRLABEL RTM_DELADDRLABEL
 116         RTM_GETADDRLABEL,
 117 #define RTM_GETADDRLABEL RTM_GETADDRLABEL
 118
 119         RTM_GETDCB = 78,
 120 #define RTM_GETDCB RTM_GETDCB
 121         RTM_SETDCB,
 122 #define RTM_SETDCB RTM_SETDCB
 123
 124         __RTM_MAX,
 125 #define RTM_MAX         (((__RTM_MAX + 3) & ~3) - 1)
 126 };
 127
 128 #define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE)
 129 #define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2)
 130 #define RTM_FAM(cmd)    (((cmd) - RTM_BASE) >> 2)
 131
 132 /*
 133    Generic structure for encapsulation of optional route information.
 134    It is reminiscent of sockaddr, but with sa_family replaced
 135    with attribute type.
 136  */
 137
 138 struct rtattr {
 139         unsigned short  rta_len;
 140         unsigned short  rta_type;
 141 };
 142
 143 /* Macros to handle rtattributes */
 144
 145 #define RTA_ALIGNTO     4
 146 #define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) )
 147 #define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \
 148                          (rta)->rta_len >= sizeof(struct rtattr) && \
 149                          (rta)->rta_len <= (len))
 150 #define RTA_NEXT(rta,attrlen)   ((attrlen) -= RTA_ALIGN((rta)->rta_len), \
 151                                  (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
 152 #define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len))
 153 #define RTA_SPACE(len)  RTA_ALIGN(RTA_LENGTH(len))
 154 #define RTA_DATA(rta)   ((void*)(((char*)(rta)) + RTA_LENGTH(0)))
 155 #define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0))
 156
 157
 158
 159
 160 /******************************************************************************
 161  *              Definitions used in routing table administration.
 162  ****/
 163
 164 struct rtmsg {
 165         unsigned char           rtm_family;
 166         unsigned char           rtm_dst_len;
 167         unsigned char           rtm_src_len;
 168         unsigned char           rtm_tos;
 169
 170         unsigned char           rtm_table;      /* Routing table id */
 171         unsigned char           rtm_protocol;   /* Routing protocol; see below  */
 172         unsigned char           rtm_scope;      /* See below */
 173         unsigned char           rtm_type;       /* See below    */
 174
 175         unsigned                rtm_flags;
 176 };
 177
 178 /* rtm_type */
 179
 180 enum {
 181         RTN_UNSPEC,
 182         RTN_UNICAST,            /* Gateway or direct route      */
 183         RTN_LOCAL,              /* Accept locally               */
 184         RTN_BROADCAST,          /* Accept locally as broadcast,
 185                                    send as broadcast */
 186         RTN_ANYCAST,            /* Accept locally as broadcast,
 187                                    but send as unicast */
 188         RTN_MULTICAST,          /* Multicast route              */
 189         RTN_BLACKHOLE,          /* Drop                         */
 190         RTN_UNREACHABLE,        /* Destination is unreachable   */
 191         RTN_PROHIBIT,           /* Administratively prohibited  */
 192         RTN_THROW,              /* Not in this table            */
 193         RTN_NAT,                /* Translate this address       */
 194         RTN_XRESOLVE,           /* Use external resolver        */
 195         __RTN_MAX
 196 };
 197
 198 #define RTN_MAX (__RTN_MAX - 1)
 199
 200
 201 /* rtm_protocol */
 202
 203 #define RTPROT_UNSPEC   0
 204 #define RTPROT_REDIRECT 1       /* Route installed by ICMP redirects;
 205                                    not used by current IPv4 */
 206 #define RTPROT_KERNEL   2       /* Route installed by kernel            */
 207 #define RTPROT_BOOT     3       /* Route installed during boot          */
 208 #define RTPROT_STATIC   4       /* Route installed by administrator     */
 209
 210 /* Values of protocol >= RTPROT_STATIC are not interpreted by kernel;
 211    they are just passed from user and back as is.
 212    It will be used by hypothetical multiple routing daemons.
 213    Note that protocol values should be standardized in order to
 214    avoid conflicts.
 215  */
 216
 217 #define RTPROT_GATED    8       /* Apparently, GateD */
 218 #define RTPROT_RA       9       /* RDISC/ND router advertisements */
 219 #define RTPROT_MRT      10      /* Merit MRT */
 220 #define RTPROT_ZEBRA    11      /* Zebra */
 221 #define RTPROT_BIRD     12      /* BIRD */
 222 #define RTPROT_DNROUTED 13      /* DECnet routing daemon */
 223 #define RTPROT_XORP     14      /* XORP */
 224 #define RTPROT_NTK      15      /* Netsukuku */
 225 #define RTPROT_DHCP     16      /* DHCP client */
 226
 227 /* rtm_scope
 228
 229    Really it is not scope, but sort of distance to the destination.
 230    NOWHERE are reserved for not existing destinations, HOST is our
 231    local addresses, LINK are destinations, located on directly attached
 232    link and UNIVERSE is everywhere in the Universe.
 233
 234    Intermediate values are also possible f.e. interior routes
 235    could be assigned a value between UNIVERSE and LINK.
 236 */
 237
 238 enum rt_scope_t {
 239         RT_SCOPE_UNIVERSE=0,
 240 /* User defined values  */
 241         RT_SCOPE_SITE=200,
 242         RT_SCOPE_LINK=253,
 243         RT_SCOPE_HOST=254,
 244         RT_SCOPE_NOWHERE=255
 245 };
 246
 247 /* rtm_flags */
 248
 249 #define RTM_F_NOTIFY            0x100   /* Notify user of route change  */
 250 #define RTM_F_CLONED            0x200   /* This route is cloned         */
 251 #define RTM_F_EQUALIZE          0x400   /* Multipath equalizer: NI      */
 252 #define RTM_F_PREFIX            0x800   /* Prefix addresses             */
 253
 254 /* Reserved table identifiers */
 255
 256 enum rt_class_t {
 257         RT_TABLE_UNSPEC=0,
 258 /* User defined values */
 259         RT_TABLE_COMPAT=252,
 260         RT_TABLE_DEFAULT=253,
 261         RT_TABLE_MAIN=254,
 262         RT_TABLE_LOCAL=255,
 263         RT_TABLE_MAX=0xFFFFFFFF
 264 };
 265
 266
 267 /* Routing message attributes */
 268
 269 enum rtattr_type_t {
 270         RTA_UNSPEC,
 271         RTA_DST,
 272         RTA_SRC,
 273         RTA_IIF,
 274         RTA_OIF,
 275         RTA_GATEWAY,
 276         RTA_PRIORITY,
 277         RTA_PREFSRC,
 278         RTA_METRICS,
 279         RTA_MULTIPATH,
 280         RTA_PROTOINFO, /* no longer used */
 281         RTA_FLOW,
 282         RTA_CACHEINFO,
 283         RTA_SESSION, /* no longer used */
 284         RTA_MP_ALGO, /* no longer used */
 285         RTA_TABLE,
 286         RTA_MARK,
 287         __RTA_MAX
 288 };
 289
 290 #define RTA_MAX (__RTA_MAX - 1)
 291
 292 #define RTM_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
 293 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
 294
 295 /* RTM_MULTIPATH --- array of struct rtnexthop.
 296  *
 297  * "struct rtnexthop" describes all necessary nexthop information,
 298  * i.e. parameters of path to a destination via this nexthop.
 299  *
 300  * At the moment it is impossible to set different prefsrc, mtu, window
 301  * and rtt for different paths from multipath.
 302  */
 303
 304 struct rtnexthop {
 305         unsigned short          rtnh_len;
 306         unsigned char           rtnh_flags;
 307         unsigned char           rtnh_hops;
 308         int                     rtnh_ifindex;
 309 };
 310
 311 /* rtnh_flags */
 312
 313 #define RTNH_F_DEAD             1       /* Nexthop is dead (used by multipath)  */
 314 #define RTNH_F_PERVASIVE        2       /* Do recursive gateway lookup  */
 315 #define RTNH_F_ONLINK           4       /* Gateway is forced on link    */
 316
 317 /* Macros to handle hexthops */
 318
 319 #define RTNH_ALIGNTO    4
 320 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) )
 321 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \
 322                            ((int)(rtnh)->rtnh_len) <= (len))
 323 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len)))
 324 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len))
 325 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len))
 326 #define RTNH_DATA(rtnh)   ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0)))
 327
 328 /* RTM_CACHEINFO */
 329
 330 struct rta_cacheinfo {
 331         __u32   rta_clntref;
 332         __u32   rta_lastuse;
 333         __s32   rta_expires;
 334         __u32   rta_error;
 335         __u32   rta_used;
 336
 337 #define RTNETLINK_HAVE_PEERINFO 1
 338         __u32   rta_id;
 339         __u32   rta_ts;
 340         __u32   rta_tsage;
 341 };
 342
 343 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
 344
 345 enum {
 346         RTAX_UNSPEC,
 347 #define RTAX_UNSPEC RTAX_UNSPEC
 348         RTAX_LOCK,
 349 #define RTAX_LOCK RTAX_LOCK
 350         RTAX_MTU,
 351 #define RTAX_MTU RTAX_MTU
 352         RTAX_WINDOW,
 353 #define RTAX_WINDOW RTAX_WINDOW
 354         RTAX_RTT,
 355 #define RTAX_RTT RTAX_RTT
 356         RTAX_RTTVAR,
 357 #define RTAX_RTTVAR RTAX_RTTVAR
 358         RTAX_SSTHRESH,
 359 #define RTAX_SSTHRESH RTAX_SSTHRESH
 360         RTAX_CWND,
 361 #define RTAX_CWND RTAX_CWND
 362         RTAX_ADVMSS,
 363 #define RTAX_ADVMSS RTAX_ADVMSS
 364         RTAX_REORDERING,
 365 #define RTAX_REORDERING RTAX_REORDERING
 366         RTAX_HOPLIMIT,
 367 #define RTAX_HOPLIMIT RTAX_HOPLIMIT
 368         RTAX_INITCWND,
 369 #define RTAX_INITCWND RTAX_INITCWND
 370         RTAX_FEATURES,
 371 #define RTAX_FEATURES RTAX_FEATURES
 372         RTAX_RTO_MIN,
 373 #define RTAX_RTO_MIN RTAX_RTO_MIN
 374         RTAX_INITRWND,
 375 #define RTAX_INITRWND RTAX_INITRWND
 376         __RTAX_MAX
 377 };
 378
 379 #define RTAX_MAX (__RTAX_MAX - 1)
 380
 381 #define RTAX_FEATURE_ECN        0x00000001
 382 #define RTAX_FEATURE_SACK       0x00000002
 383 #define RTAX_FEATURE_TIMESTAMP  0x00000004
 384 #define RTAX_FEATURE_ALLFRAG    0x00000008
 385
 386 struct rta_session {
 387         __u8    proto;
 388         __u8    pad1;
 389         __u16   pad2;
 390
 391         union {
 392                 struct {
 393                         __u16   sport;
 394                         __u16   dport;
 395                 } ports;
 396
 397                 struct {
 398                         __u8    type;
 399                         __u8    code;
 400                         __u16   ident;
 401                 } icmpt;
 402
 403                 __u32           spi;
 404         } u;
 405 };
 406
 407 /****
 408  *              General form of address family dependent message.
 409  ****/
 410
 411 struct rtgenmsg {
 412         unsigned char           rtgen_family;
 413 };
 414
 415 /*****************************************************************
 416  *              Link layer specific messages.
 417  ****/
 418
 419 /* struct ifinfomsg
 420  * passes link level specific information, not dependent
 421  * on network protocol.
 422  */
 423
 424 struct ifinfomsg {
 425         unsigned char   ifi_family;
 426         unsigned char   __ifi_pad;
 427         unsigned short  ifi_type;               /* ARPHRD_* */
 428         int             ifi_index;              /* Link index   */
 429         unsigned        ifi_flags;              /* IFF_* flags  */
 430         unsigned        ifi_change;             /* IFF_* change mask */
 431 };
 432
 433 /********************************************************************
 434  *              prefix information
 435  ****/
 436
 437 struct prefixmsg {
 438         unsigned char   prefix_family;
 439         unsigned char   prefix_pad1;
 440         unsigned short  prefix_pad2;
 441         int             prefix_ifindex;
 442         unsigned char   prefix_type;
 443         unsigned char   prefix_len;
 444         unsigned char   prefix_flags;
 445         unsigned char   prefix_pad3;
 446 };
 447
 448 enum
 449 {
 450         PREFIX_UNSPEC,
 451         PREFIX_ADDRESS,
 452         PREFIX_CACHEINFO,
 453         __PREFIX_MAX
 454 };
 455
 456 #define PREFIX_MAX      (__PREFIX_MAX - 1)
 457
 458 struct prefix_cacheinfo {
 459         __u32   preferred_time;
 460         __u32   valid_time;
 461 };
 462
 463
 464 /*****************************************************************
 465  *              Traffic control messages.
 466  ****/
 467
 468 struct tcmsg {
 469         unsigned char   tcm_family;
 470         unsigned char   tcm__pad1;
 471         unsigned short  tcm__pad2;
 472         int             tcm_ifindex;
 473         __u32           tcm_handle;
 474         __u32           tcm_parent;
 475         __u32           tcm_info;
 476 };
 477
 478 enum {
 479         TCA_UNSPEC,
 480         TCA_KIND,
 481         TCA_OPTIONS,
 482         TCA_STATS,
 483         TCA_XSTATS,
 484         TCA_RATE,
 485         TCA_FCNT,
 486         TCA_STATS2,
 487         TCA_STAB,
 488         __TCA_MAX
 489 };
 490
 491 #define TCA_MAX (__TCA_MAX - 1)
 492
 493 #define TCA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
 494 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
 495
 496 /********************************************************************
 497  *              Neighbor Discovery userland options
 498  ****/
 499
 500 struct nduseroptmsg {
 501         unsigned char   nduseropt_family;
 502         unsigned char   nduseropt_pad1;
 503         unsigned short  nduseropt_opts_len;     /* Total length of options */
 504         int             nduseropt_ifindex;
 505         __u8            nduseropt_icmp_type;
 506         __u8            nduseropt_icmp_code;
 507         unsigned short  nduseropt_pad2;
 508         unsigned int    nduseropt_pad3;
 509         /* Followed by one or more ND options */
 510 };
 511
 512 enum {
 513         NDUSEROPT_UNSPEC,
 514         NDUSEROPT_SRCADDR,
 515         __NDUSEROPT_MAX
 516 };
 517
 518 #define NDUSEROPT_MAX   (__NDUSEROPT_MAX - 1)
 519
 520 #ifndef __KERNEL__
 521 /* RTnetlink multicast groups - backwards compatibility for userspace */
 522 #define RTMGRP_LINK             1
 523 #define RTMGRP_NOTIFY           2
 524 #define RTMGRP_NEIGH            4
 525 #define RTMGRP_TC               8
 526
 527 #define RTMGRP_IPV4_IFADDR      0x10
 528 #define RTMGRP_IPV4_MROUTE      0x20
 529 #define RTMGRP_IPV4_ROUTE       0x40
 530 #define RTMGRP_IPV4_RULE        0x80
 531
 532 #define RTMGRP_IPV6_IFADDR      0x100
 533 #define RTMGRP_IPV6_MROUTE      0x200
 534 #define RTMGRP_IPV6_ROUTE       0x400
 535 #define RTMGRP_IPV6_IFINFO      0x800
 536
 537 #define RTMGRP_DECnet_IFADDR    0x1000
 538 #define RTMGRP_DECnet_ROUTE     0x4000
 539
 540 #define RTMGRP_IPV6_PREFIX      0x20000
 541 #endif
 542
 543 /* RTnetlink multicast groups */
 544 enum rtnetlink_groups {
 545         RTNLGRP_NONE,
 546 #define RTNLGRP_NONE            RTNLGRP_NONE
 547         RTNLGRP_LINK,
 548 #define RTNLGRP_LINK            RTNLGRP_LINK
 549         RTNLGRP_NOTIFY,
 550 #define RTNLGRP_NOTIFY          RTNLGRP_NOTIFY
 551         RTNLGRP_NEIGH,
 552 #define RTNLGRP_NEIGH           RTNLGRP_NEIGH
 553         RTNLGRP_TC,
 554 #define RTNLGRP_TC              RTNLGRP_TC
 555         RTNLGRP_IPV4_IFADDR,
 556 #define RTNLGRP_IPV4_IFADDR     RTNLGRP_IPV4_IFADDR
 557         RTNLGRP_IPV4_MROUTE,
 558 #define RTNLGRP_IPV4_MROUTE     RTNLGRP_IPV4_MROUTE
 559         RTNLGRP_IPV4_ROUTE,
 560 #define RTNLGRP_IPV4_ROUTE      RTNLGRP_IPV4_ROUTE
 561         RTNLGRP_IPV4_RULE,
 562 #define RTNLGRP_IPV4_RULE       RTNLGRP_IPV4_RULE
 563         RTNLGRP_IPV6_IFADDR,
 564 #define RTNLGRP_IPV6_IFADDR     RTNLGRP_IPV6_IFADDR
 565         RTNLGRP_IPV6_MROUTE,
 566 #define RTNLGRP_IPV6_MROUTE     RTNLGRP_IPV6_MROUTE
 567         RTNLGRP_IPV6_ROUTE,
 568 #define RTNLGRP_IPV6_ROUTE      RTNLGRP_IPV6_ROUTE
 569         RTNLGRP_IPV6_IFINFO,
 570 #define RTNLGRP_IPV6_IFINFO     RTNLGRP_IPV6_IFINFO
 571         RTNLGRP_DECnet_IFADDR,
 572 #define RTNLGRP_DECnet_IFADDR   RTNLGRP_DECnet_IFADDR
 573         RTNLGRP_NOP2,
 574         RTNLGRP_DECnet_ROUTE,
 575 #define RTNLGRP_DECnet_ROUTE    RTNLGRP_DECnet_ROUTE
 576         RTNLGRP_DECnet_RULE,
 577 #define RTNLGRP_DECnet_RULE     RTNLGRP_DECnet_RULE
 578         RTNLGRP_NOP4,
 579         RTNLGRP_IPV6_PREFIX,
 580 #define RTNLGRP_IPV6_PREFIX     RTNLGRP_IPV6_PREFIX
 581         RTNLGRP_IPV6_RULE,
 582 #define RTNLGRP_IPV6_RULE       RTNLGRP_IPV6_RULE
 583         RTNLGRP_ND_USEROPT,
 584 #define RTNLGRP_ND_USEROPT      RTNLGRP_ND_USEROPT
 585         RTNLGRP_PHONET_IFADDR,
 586 #define RTNLGRP_PHONET_IFADDR   RTNLGRP_PHONET_IFADDR
 587         RTNLGRP_PHONET_ROUTE,
 588 #define RTNLGRP_PHONET_ROUTE    RTNLGRP_PHONET_ROUTE
 589         __RTNLGRP_MAX
 590 };
 591 #define RTNLGRP_MAX     (__RTNLGRP_MAX - 1)
 592
 593 /* TC action piece */
 594 struct tcamsg {
 595         unsigned char   tca_family;
 596         unsigned char   tca__pad1;
 597         unsigned short  tca__pad2;
 598 };
 599 #define TA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
 600 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
 601 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
 602 #define TCAA_MAX 1
 603
 604 /* End of information exported to user level */
 605
 606 #ifdef __KERNEL__
 607
 608 #include <linux/mutex.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, rcu_read_lock_held() ||        \
 762                                  lockdep_rtnl_is_held())
 763
 764 /**
 765  * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
 766  * @p: The pointer to read, prior to dereferencing
 767  *
 768  * Return the value of the specified RCU-protected pointer, but omit
 769  * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because
 770  * caller holds RTNL.
 771  */
 772 #define rtnl_dereference(p)                                     \
 773         rcu_dereference_protected(p, lockdep_rtnl_is_held())
 774
 775 static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev)
 776 {
 777         return rtnl_dereference(dev->ingress_queue);
 778 }
 779
 780 extern struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
 781
 782 extern void rtnetlink_init(void);
 783 extern void __rtnl_unlock(void);
 784
 785 #define ASSERT_RTNL() do { \
 786         if (unlikely(!rtnl_is_locked())) { \
 787                 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
 788                        __FILE__,  __LINE__); \
 789                 dump_stack(); \
 790         } \
 791 } while(0)
 792
 793 static inline u32 rtm_get_table(struct rtattr **rta, u8 table)
 794 {
 795         return RTA_GET_U32(rta[RTA_TABLE-1]);
 796 rtattr_failure:
 797         return table;
 798 }
 799
 800 #endif /* __KERNEL__ */
 801
 802
 803 #endif  /* __LINUX_RTNETLINK_H */