include/linux/rtnetlink.h

   1 #ifndef __LINUX_RTNETLINK_H
   2 #define __LINUX_RTNETLINK_H
   3
   4 #include <linux/netlink.h>
   5 #include <linux/if_link.h>
   6 #include <linux/if_addr.h>
   7 #include <linux/neighbour.h>
   8
   9 /****
  10  *              Routing/neighbour discovery messages.
  11  ****/
  12
  13 /* Types of messages */
  14
  15 enum {
  16         RTM_BASE        = 16,
  17 #define RTM_BASE        RTM_BASE
  18
  19         RTM_NEWLINK     = 16,
  20 #define RTM_NEWLINK     RTM_NEWLINK
  21         RTM_DELLINK,
  22 #define RTM_DELLINK     RTM_DELLINK
  23         RTM_GETLINK,
  24 #define RTM_GETLINK     RTM_GETLINK
  25         RTM_SETLINK,
  26 #define RTM_SETLINK     RTM_SETLINK
  27
  28         RTM_NEWADDR     = 20,
  29 #define RTM_NEWADDR     RTM_NEWADDR
  30         RTM_DELADDR,
  31 #define RTM_DELADDR     RTM_DELADDR
  32         RTM_GETADDR,
  33 #define RTM_GETADDR     RTM_GETADDR
  34
  35         RTM_NEWROUTE    = 24,
  36 #define RTM_NEWROUTE    RTM_NEWROUTE
  37         RTM_DELROUTE,
  38 #define RTM_DELROUTE    RTM_DELROUTE
  39         RTM_GETROUTE,
  40 #define RTM_GETROUTE    RTM_GETROUTE
  41
  42         RTM_NEWNEIGH    = 28,
  43 #define RTM_NEWNEIGH    RTM_NEWNEIGH
  44         RTM_DELNEIGH,
  45 #define RTM_DELNEIGH    RTM_DELNEIGH
  46         RTM_GETNEIGH,
  47 #define RTM_GETNEIGH    RTM_GETNEIGH
  48
  49         RTM_NEWRULE     = 32,
  50 #define RTM_NEWRULE     RTM_NEWRULE
  51         RTM_DELRULE,
  52 #define RTM_DELRULE     RTM_DELRULE
  53         RTM_GETRULE,
  54 #define RTM_GETRULE     RTM_GETRULE
  55
  56         RTM_NEWQDISC    = 36,
  57 #define RTM_NEWQDISC    RTM_NEWQDISC
  58         RTM_DELQDISC,
  59 #define RTM_DELQDISC    RTM_DELQDISC
  60         RTM_GETQDISC,
  61 #define RTM_GETQDISC    RTM_GETQDISC
  62
  63         RTM_NEWTCLASS   = 40,
  64 #define RTM_NEWTCLASS   RTM_NEWTCLASS
  65         RTM_DELTCLASS,
  66 #define RTM_DELTCLASS   RTM_DELTCLASS
  67         RTM_GETTCLASS,
  68 #define RTM_GETTCLASS   RTM_GETTCLASS
  69
  70         RTM_NEWTFILTER  = 44,
  71 #define RTM_NEWTFILTER  RTM_NEWTFILTER
  72         RTM_DELTFILTER,
  73 #define RTM_DELTFILTER  RTM_DELTFILTER
  74         RTM_GETTFILTER,
  75 #define RTM_GETTFILTER  RTM_GETTFILTER
  76
  77         RTM_NEWACTION   = 48,
  78 #define RTM_NEWACTION   RTM_NEWACTION
  79         RTM_DELACTION,
  80 #define RTM_DELACTION   RTM_DELACTION
  81         RTM_GETACTION,
  82 #define RTM_GETACTION   RTM_GETACTION
  83
  84         RTM_NEWPREFIX   = 52,
  85 #define RTM_NEWPREFIX   RTM_NEWPREFIX
  86
  87         RTM_GETMULTICAST = 58,
  88 #define RTM_GETMULTICAST RTM_GETMULTICAST
  89
  90         RTM_GETANYCAST  = 62,
  91 #define RTM_GETANYCAST  RTM_GETANYCAST
  92
  93         RTM_NEWNEIGHTBL = 64,
  94 #define RTM_NEWNEIGHTBL RTM_NEWNEIGHTBL
  95         RTM_GETNEIGHTBL = 66,
  96 #define RTM_GETNEIGHTBL RTM_GETNEIGHTBL
  97         RTM_SETNEIGHTBL,
  98 #define RTM_SETNEIGHTBL RTM_SETNEIGHTBL
  99
 100         RTM_NEWNDUSEROPT = 68,
 101 #define RTM_NEWNDUSEROPT RTM_NEWNDUSEROPT
 102
 103         __RTM_MAX,
 104 #define RTM_MAX         (((__RTM_MAX + 3) & ~3) - 1)
 105 };
 106
 107 #define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE)
 108 #define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2)
 109 #define RTM_FAM(cmd)    (((cmd) - RTM_BASE) >> 2)
 110
 111 /*
 112    Generic structure for encapsulation of optional route information.
 113    It is reminiscent of sockaddr, but with sa_family replaced
 114    with attribute type.
 115  */
 116
 117 struct rtattr
 118 {
 119         unsigned short  rta_len;
 120         unsigned short  rta_type;
 121 };
 122
 123 /* Macros to handle rtattributes */
 124
 125 #define RTA_ALIGNTO     4
 126 #define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) )
 127 #define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \
 128                          (rta)->rta_len >= sizeof(struct rtattr) && \
 129                          (rta)->rta_len <= (len))
 130 #define RTA_NEXT(rta,attrlen)   ((attrlen) -= RTA_ALIGN((rta)->rta_len), \
 131                                  (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
 132 #define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len))
 133 #define RTA_SPACE(len)  RTA_ALIGN(RTA_LENGTH(len))
 134 #define RTA_DATA(rta)   ((void*)(((char*)(rta)) + RTA_LENGTH(0)))
 135 #define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0))
 136
 137
 138
 139
 140 /******************************************************************************
 141  *              Definitions used in routing table administration.
 142  ****/
 143
 144 struct rtmsg
 145 {
 146         unsigned char           rtm_family;
 147         unsigned char           rtm_dst_len;
 148         unsigned char           rtm_src_len;
 149         unsigned char           rtm_tos;
 150
 151         unsigned char           rtm_table;      /* Routing table id */
 152         unsigned char           rtm_protocol;   /* Routing protocol; see below  */
 153         unsigned char           rtm_scope;      /* See below */
 154         unsigned char           rtm_type;       /* See below    */
 155
 156         unsigned                rtm_flags;
 157 };
 158
 159 /* rtm_type */
 160
 161 enum
 162 {
 163         RTN_UNSPEC,
 164         RTN_UNICAST,            /* Gateway or direct route      */
 165         RTN_LOCAL,              /* Accept locally               */
 166         RTN_BROADCAST,          /* Accept locally as broadcast,
 167                                    send as broadcast */
 168         RTN_ANYCAST,            /* Accept locally as broadcast,
 169                                    but send as unicast */
 170         RTN_MULTICAST,          /* Multicast route              */
 171         RTN_BLACKHOLE,          /* Drop                         */
 172         RTN_UNREACHABLE,        /* Destination is unreachable   */
 173         RTN_PROHIBIT,           /* Administratively prohibited  */
 174         RTN_THROW,              /* Not in this table            */
 175         RTN_NAT,                /* Translate this address       */
 176         RTN_XRESOLVE,           /* Use external resolver        */
 177         __RTN_MAX
 178 };
 179
 180 #define RTN_MAX (__RTN_MAX - 1)
 181
 182
 183 /* rtm_protocol */
 184
 185 #define RTPROT_UNSPEC   0
 186 #define RTPROT_REDIRECT 1       /* Route installed by ICMP redirects;
 187                                    not used by current IPv4 */
 188 #define RTPROT_KERNEL   2       /* Route installed by kernel            */
 189 #define RTPROT_BOOT     3       /* Route installed during boot          */
 190 #define RTPROT_STATIC   4       /* Route installed by administrator     */
 191
 192 /* Values of protocol >= RTPROT_STATIC are not interpreted by kernel;
 193    they are just passed from user and back as is.
 194    It will be used by hypothetical multiple routing daemons.
 195    Note that protocol values should be standardized in order to
 196    avoid conflicts.
 197  */
 198
 199 #define RTPROT_GATED    8       /* Apparently, GateD */
 200 #define RTPROT_RA       9       /* RDISC/ND router advertisements */
 201 #define RTPROT_MRT      10      /* Merit MRT */
 202 #define RTPROT_ZEBRA    11      /* Zebra */
 203 #define RTPROT_BIRD     12      /* BIRD */
 204 #define RTPROT_DNROUTED 13      /* DECnet routing daemon */
 205 #define RTPROT_XORP     14      /* XORP */
 206 #define RTPROT_NTK      15      /* Netsukuku */
 207
 208 /* rtm_scope
 209
 210    Really it is not scope, but sort of distance to the destination.
 211    NOWHERE are reserved for not existing destinations, HOST is our
 212    local addresses, LINK are destinations, located on directly attached
 213    link and UNIVERSE is everywhere in the Universe.
 214
 215    Intermediate values are also possible f.e. interior routes
 216    could be assigned a value between UNIVERSE and LINK.
 217 */
 218
 219 enum rt_scope_t
 220 {
 221         RT_SCOPE_UNIVERSE=0,
 222 /* User defined values  */
 223         RT_SCOPE_SITE=200,
 224         RT_SCOPE_LINK=253,
 225         RT_SCOPE_HOST=254,
 226         RT_SCOPE_NOWHERE=255
 227 };
 228
 229 /* rtm_flags */
 230
 231 #define RTM_F_NOTIFY            0x100   /* Notify user of route change  */
 232 #define RTM_F_CLONED            0x200   /* This route is cloned         */
 233 #define RTM_F_EQUALIZE          0x400   /* Multipath equalizer: NI      */
 234 #define RTM_F_PREFIX            0x800   /* Prefix addresses             */
 235
 236 /* Reserved table identifiers */
 237
 238 enum rt_class_t
 239 {
 240         RT_TABLE_UNSPEC=0,
 241 /* User defined values */
 242         RT_TABLE_DEFAULT=253,
 243         RT_TABLE_MAIN=254,
 244         RT_TABLE_LOCAL=255,
 245         RT_TABLE_MAX=0xFFFFFFFF
 246 };
 247
 248
 249 /* Routing message attributes */
 250
 251 enum rtattr_type_t
 252 {
 253         RTA_UNSPEC,
 254         RTA_DST,
 255         RTA_SRC,
 256         RTA_IIF,
 257         RTA_OIF,
 258         RTA_GATEWAY,
 259         RTA_PRIORITY,
 260         RTA_PREFSRC,
 261         RTA_METRICS,
 262         RTA_MULTIPATH,
 263         RTA_PROTOINFO,
 264         RTA_FLOW,
 265         RTA_CACHEINFO,
 266         RTA_SESSION,
 267         RTA_MP_ALGO, /* no longer used */
 268         RTA_TABLE,
 269         __RTA_MAX
 270 };
 271
 272 #define RTA_MAX (__RTA_MAX - 1)
 273
 274 #define RTM_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
 275 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
 276
 277 /* RTM_MULTIPATH --- array of struct rtnexthop.
 278  *
 279  * "struct rtnexthop" describes all necessary nexthop information,
 280  * i.e. parameters of path to a destination via this nexthop.
 281  *
 282  * At the moment it is impossible to set different prefsrc, mtu, window
 283  * and rtt for different paths from multipath.
 284  */
 285
 286 struct rtnexthop
 287 {
 288         unsigned short          rtnh_len;
 289         unsigned char           rtnh_flags;
 290         unsigned char           rtnh_hops;
 291         int                     rtnh_ifindex;
 292 };
 293
 294 /* rtnh_flags */
 295
 296 #define RTNH_F_DEAD             1       /* Nexthop is dead (used by multipath)  */
 297 #define RTNH_F_PERVASIVE        2       /* Do recursive gateway lookup  */
 298 #define RTNH_F_ONLINK           4       /* Gateway is forced on link    */
 299
 300 /* Macros to handle hexthops */
 301
 302 #define RTNH_ALIGNTO    4
 303 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) )
 304 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \
 305                            ((int)(rtnh)->rtnh_len) <= (len))
 306 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len)))
 307 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len))
 308 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len))
 309 #define RTNH_DATA(rtnh)   ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0)))
 310
 311 /* RTM_CACHEINFO */
 312
 313 struct rta_cacheinfo
 314 {
 315         __u32   rta_clntref;
 316         __u32   rta_lastuse;
 317         __s32   rta_expires;
 318         __u32   rta_error;
 319         __u32   rta_used;
 320
 321 #define RTNETLINK_HAVE_PEERINFO 1
 322         __u32   rta_id;
 323         __u32   rta_ts;
 324         __u32   rta_tsage;
 325 };
 326
 327 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
 328
 329 enum
 330 {
 331         RTAX_UNSPEC,
 332 #define RTAX_UNSPEC RTAX_UNSPEC
 333         RTAX_LOCK,
 334 #define RTAX_LOCK RTAX_LOCK
 335         RTAX_MTU,
 336 #define RTAX_MTU RTAX_MTU
 337         RTAX_WINDOW,
 338 #define RTAX_WINDOW RTAX_WINDOW
 339         RTAX_RTT,
 340 #define RTAX_RTT RTAX_RTT
 341         RTAX_RTTVAR,
 342 #define RTAX_RTTVAR RTAX_RTTVAR
 343         RTAX_SSTHRESH,
 344 #define RTAX_SSTHRESH RTAX_SSTHRESH
 345         RTAX_CWND,
 346 #define RTAX_CWND RTAX_CWND
 347         RTAX_ADVMSS,
 348 #define RTAX_ADVMSS RTAX_ADVMSS
 349         RTAX_REORDERING,
 350 #define RTAX_REORDERING RTAX_REORDERING
 351         RTAX_HOPLIMIT,
 352 #define RTAX_HOPLIMIT RTAX_HOPLIMIT
 353         RTAX_INITCWND,
 354 #define RTAX_INITCWND RTAX_INITCWND
 355         RTAX_FEATURES,
 356 #define RTAX_FEATURES RTAX_FEATURES
 357         RTAX_RTO_MIN,
 358 #define RTAX_RTO_MIN RTAX_RTO_MIN
 359         __RTAX_MAX
 360 };
 361
 362 #define RTAX_MAX (__RTAX_MAX - 1)
 363
 364 #define RTAX_FEATURE_ECN        0x00000001
 365 #define RTAX_FEATURE_SACK       0x00000002
 366 #define RTAX_FEATURE_TIMESTAMP  0x00000004
 367 #define RTAX_FEATURE_ALLFRAG    0x00000008
 368
 369 struct rta_session
 370 {
 371         __u8    proto;
 372         __u8    pad1;
 373         __u16   pad2;
 374
 375         union {
 376                 struct {
 377                         __u16   sport;
 378                         __u16   dport;
 379                 } ports;
 380
 381                 struct {
 382                         __u8    type;
 383                         __u8    code;
 384                         __u16   ident;
 385                 } icmpt;
 386
 387                 __u32           spi;
 388         } u;
 389 };
 390
 391 /****
 392  *              General form of address family dependent message.
 393  ****/
 394
 395 struct rtgenmsg
 396 {
 397         unsigned char           rtgen_family;
 398 };
 399
 400 /*****************************************************************
 401  *              Link layer specific messages.
 402  ****/
 403
 404 /* struct ifinfomsg
 405  * passes link level specific information, not dependent
 406  * on network protocol.
 407  */
 408
 409 struct ifinfomsg
 410 {
 411         unsigned char   ifi_family;
 412         unsigned char   __ifi_pad;
 413         unsigned short  ifi_type;               /* ARPHRD_* */
 414         int             ifi_index;              /* Link index   */
 415         unsigned        ifi_flags;              /* IFF_* flags  */
 416         unsigned        ifi_change;             /* IFF_* change mask */
 417 };
 418
 419 /********************************************************************
 420  *              prefix information
 421  ****/
 422
 423 struct prefixmsg
 424 {
 425         unsigned char   prefix_family;
 426         unsigned char   prefix_pad1;
 427         unsigned short  prefix_pad2;
 428         int             prefix_ifindex;
 429         unsigned char   prefix_type;
 430         unsigned char   prefix_len;
 431         unsigned char   prefix_flags;
 432         unsigned char   prefix_pad3;
 433 };
 434
 435 enum
 436 {
 437         PREFIX_UNSPEC,
 438         PREFIX_ADDRESS,
 439         PREFIX_CACHEINFO,
 440         __PREFIX_MAX
 441 };
 442
 443 #define PREFIX_MAX      (__PREFIX_MAX - 1)
 444
 445 struct prefix_cacheinfo
 446 {
 447         __u32   preferred_time;
 448         __u32   valid_time;
 449 };
 450
 451
 452 /*****************************************************************
 453  *              Traffic control messages.
 454  ****/
 455
 456 struct tcmsg
 457 {
 458         unsigned char   tcm_family;
 459         unsigned char   tcm__pad1;
 460         unsigned short  tcm__pad2;
 461         int             tcm_ifindex;
 462         __u32           tcm_handle;
 463         __u32           tcm_parent;
 464         __u32           tcm_info;
 465 };
 466
 467 enum
 468 {
 469         TCA_UNSPEC,
 470         TCA_KIND,
 471         TCA_OPTIONS,
 472         TCA_STATS,
 473         TCA_XSTATS,
 474         TCA_RATE,
 475         TCA_FCNT,
 476         TCA_STATS2,
 477         __TCA_MAX
 478 };
 479
 480 #define TCA_MAX (__TCA_MAX - 1)
 481
 482 #define TCA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
 483 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
 484
 485 /********************************************************************
 486  *              Neighbor Discovery userland options
 487  ****/
 488
 489 struct nduseroptmsg
 490 {
 491         unsigned char   nduseropt_family;
 492         unsigned char   nduseropt_pad1;
 493         unsigned short  nduseropt_opts_len;     /* Total length of options */
 494         int             nduseropt_ifindex;
 495         __u8            nduseropt_icmp_type;
 496         __u8            nduseropt_icmp_code;
 497         unsigned short  nduseropt_pad2;
 498         unsigned int    nduseropt_pad3;
 499         /* Followed by one or more ND options */
 500 };
 501
 502 enum
 503 {
 504         NDUSEROPT_UNSPEC,
 505         NDUSEROPT_SRCADDR,
 506         __NDUSEROPT_MAX
 507 };
 508
 509 #define NDUSEROPT_MAX   (__NDUSEROPT_MAX - 1)
 510
 511 #ifndef __KERNEL__
 512 /* RTnetlink multicast groups - backwards compatibility for userspace */
 513 #define RTMGRP_LINK             1
 514 #define RTMGRP_NOTIFY           2
 515 #define RTMGRP_NEIGH            4
 516 #define RTMGRP_TC               8
 517
 518 #define RTMGRP_IPV4_IFADDR      0x10
 519 #define RTMGRP_IPV4_MROUTE      0x20
 520 #define RTMGRP_IPV4_ROUTE       0x40
 521 #define RTMGRP_IPV4_RULE        0x80
 522
 523 #define RTMGRP_IPV6_IFADDR      0x100
 524 #define RTMGRP_IPV6_MROUTE      0x200
 525 #define RTMGRP_IPV6_ROUTE       0x400
 526 #define RTMGRP_IPV6_IFINFO      0x800
 527
 528 #define RTMGRP_DECnet_IFADDR    0x1000
 529 #define RTMGRP_DECnet_ROUTE     0x4000
 530
 531 #define RTMGRP_IPV6_PREFIX      0x20000
 532 #endif
 533
 534 /* RTnetlink multicast groups */
 535 enum rtnetlink_groups {
 536         RTNLGRP_NONE,
 537 #define RTNLGRP_NONE            RTNLGRP_NONE
 538         RTNLGRP_LINK,
 539 #define RTNLGRP_LINK            RTNLGRP_LINK
 540         RTNLGRP_NOTIFY,
 541 #define RTNLGRP_NOTIFY          RTNLGRP_NOTIFY
 542         RTNLGRP_NEIGH,
 543 #define RTNLGRP_NEIGH           RTNLGRP_NEIGH
 544         RTNLGRP_TC,
 545 #define RTNLGRP_TC              RTNLGRP_TC
 546         RTNLGRP_IPV4_IFADDR,
 547 #define RTNLGRP_IPV4_IFADDR     RTNLGRP_IPV4_IFADDR
 548         RTNLGRP_IPV4_MROUTE,
 549 #define RTNLGRP_IPV4_MROUTE     RTNLGRP_IPV4_MROUTE
 550         RTNLGRP_IPV4_ROUTE,
 551 #define RTNLGRP_IPV4_ROUTE      RTNLGRP_IPV4_ROUTE
 552         RTNLGRP_IPV4_RULE,
 553 #define RTNLGRP_IPV4_RULE       RTNLGRP_IPV4_RULE
 554         RTNLGRP_IPV6_IFADDR,
 555 #define RTNLGRP_IPV6_IFADDR     RTNLGRP_IPV6_IFADDR
 556         RTNLGRP_IPV6_MROUTE,
 557 #define RTNLGRP_IPV6_MROUTE     RTNLGRP_IPV6_MROUTE
 558         RTNLGRP_IPV6_ROUTE,
 559 #define RTNLGRP_IPV6_ROUTE      RTNLGRP_IPV6_ROUTE
 560         RTNLGRP_IPV6_IFINFO,
 561 #define RTNLGRP_IPV6_IFINFO     RTNLGRP_IPV6_IFINFO
 562         RTNLGRP_DECnet_IFADDR,
 563 #define RTNLGRP_DECnet_IFADDR   RTNLGRP_DECnet_IFADDR
 564         RTNLGRP_NOP2,
 565         RTNLGRP_DECnet_ROUTE,
 566 #define RTNLGRP_DECnet_ROUTE    RTNLGRP_DECnet_ROUTE
 567         RTNLGRP_DECnet_RULE,
 568 #define RTNLGRP_DECnet_RULE     RTNLGRP_DECnet_RULE
 569         RTNLGRP_NOP4,
 570         RTNLGRP_IPV6_PREFIX,
 571 #define RTNLGRP_IPV6_PREFIX     RTNLGRP_IPV6_PREFIX
 572         RTNLGRP_IPV6_RULE,
 573 #define RTNLGRP_IPV6_RULE       RTNLGRP_IPV6_RULE
 574         RTNLGRP_ND_USEROPT,
 575 #define RTNLGRP_ND_USEROPT      RTNLGRP_ND_USEROPT
 576         __RTNLGRP_MAX
 577 };
 578 #define RTNLGRP_MAX     (__RTNLGRP_MAX - 1)
 579
 580 /* TC action piece */
 581 struct tcamsg
 582 {
 583         unsigned char   tca_family;
 584         unsigned char   tca__pad1;
 585         unsigned short  tca__pad2;
 586 };
 587 #define TA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
 588 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
 589 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
 590 #define TCAA_MAX 1
 591
 592 /* End of information exported to user level */
 593
 594 #ifdef __KERNEL__
 595
 596 #include <linux/mutex.h>
 597
 598 extern size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size);
 599 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
 600 {
 601         int len = strlen(str) + 1;
 602         return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
 603 }
 604
 605 extern int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len);
 606 extern int __rtattr_parse_nested_compat(struct rtattr *tb[], int maxattr,
 607                                         struct rtattr *rta, int len);
 608
 609 #define rtattr_parse_nested(tb, max, rta) \
 610         rtattr_parse((tb), (max), RTA_DATA((rta)), RTA_PAYLOAD((rta)))
 611
 612 #define rtattr_parse_nested_compat(tb, max, rta, data, len) \
 613 ({      data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
 614         __rtattr_parse_nested_compat(tb, max, rta, len); })
 615
 616 extern int rtnetlink_send(struct sk_buff *skb, u32 pid, u32 group, int echo);
 617 extern int rtnl_unicast(struct sk_buff *skb, u32 pid);
 618 extern int rtnl_notify(struct sk_buff *skb, u32 pid, u32 group,
 619                        struct nlmsghdr *nlh, gfp_t flags);
 620 extern void rtnl_set_sk_err(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
 749 extern void rtnetlink_init(void);
 750 extern void __rtnl_unlock(void);
 751
 752 #define ASSERT_RTNL() do { \
 753         if (unlikely(rtnl_trylock())) { \
 754                 rtnl_unlock(); \
 755                 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
 756                        __FILE__,  __LINE__); \
 757                 dump_stack(); \
 758         } \
 759 } while(0)
 760
 761 #define BUG_TRAP(x) do { \
 762         if (unlikely(!(x))) { \
 763                 printk(KERN_ERR "KERNEL: assertion (%s) failed at %s (%d)\n", \
 764                         #x,  __FILE__ , __LINE__); \
 765         } \
 766 } while(0)
 767
 768 static inline u32 rtm_get_table(struct rtattr **rta, u8 table)
 769 {
 770         return RTA_GET_U32(rta[RTA_TABLE-1]);
 771 rtattr_failure:
 772         return table;
 773 }
 774
 775 #endif /* __KERNEL__ */
 776
 777
 778 #endif  /* __LINUX_RTNETLINK_H */