rtnetlink.h revision 05bfd165958d1859275b0158fedcb00cea58ad0d
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 15enum { 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_NEWADDRLABEL = 72, 104#define RTM_NEWADDRLABEL RTM_NEWADDRLABEL 105 RTM_DELADDRLABEL, 106#define RTM_NEWADDRLABEL RTM_NEWADDRLABEL 107 RTM_GETADDRLABEL, 108#define RTM_GETADDRLABEL RTM_GETADDRLABEL 109 110 __RTM_MAX, 111#define RTM_MAX (((__RTM_MAX + 3) & ~3) - 1) 112}; 113 114#define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE) 115#define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2) 116#define RTM_FAM(cmd) (((cmd) - RTM_BASE) >> 2) 117 118/* 119 Generic structure for encapsulation of optional route information. 120 It is reminiscent of sockaddr, but with sa_family replaced 121 with attribute type. 122 */ 123 124struct rtattr 125{ 126 unsigned short rta_len; 127 unsigned short rta_type; 128}; 129 130/* Macros to handle rtattributes */ 131 132#define RTA_ALIGNTO 4 133#define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) ) 134#define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \ 135 (rta)->rta_len >= sizeof(struct rtattr) && \ 136 (rta)->rta_len <= (len)) 137#define RTA_NEXT(rta,attrlen) ((attrlen) -= RTA_ALIGN((rta)->rta_len), \ 138 (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len))) 139#define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len)) 140#define RTA_SPACE(len) RTA_ALIGN(RTA_LENGTH(len)) 141#define RTA_DATA(rta) ((void*)(((char*)(rta)) + RTA_LENGTH(0))) 142#define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0)) 143 144 145 146 147/****************************************************************************** 148 * Definitions used in routing table administration. 149 ****/ 150 151struct rtmsg 152{ 153 unsigned char rtm_family; 154 unsigned char rtm_dst_len; 155 unsigned char rtm_src_len; 156 unsigned char rtm_tos; 157 158 unsigned char rtm_table; /* Routing table id */ 159 unsigned char rtm_protocol; /* Routing protocol; see below */ 160 unsigned char rtm_scope; /* See below */ 161 unsigned char rtm_type; /* See below */ 162 163 unsigned rtm_flags; 164}; 165 166/* rtm_type */ 167 168enum 169{ 170 RTN_UNSPEC, 171 RTN_UNICAST, /* Gateway or direct route */ 172 RTN_LOCAL, /* Accept locally */ 173 RTN_BROADCAST, /* Accept locally as broadcast, 174 send as broadcast */ 175 RTN_ANYCAST, /* Accept locally as broadcast, 176 but send as unicast */ 177 RTN_MULTICAST, /* Multicast route */ 178 RTN_BLACKHOLE, /* Drop */ 179 RTN_UNREACHABLE, /* Destination is unreachable */ 180 RTN_PROHIBIT, /* Administratively prohibited */ 181 RTN_THROW, /* Not in this table */ 182 RTN_NAT, /* Translate this address */ 183 RTN_XRESOLVE, /* Use external resolver */ 184 __RTN_MAX 185}; 186 187#define RTN_MAX (__RTN_MAX - 1) 188 189 190/* rtm_protocol */ 191 192#define RTPROT_UNSPEC 0 193#define RTPROT_REDIRECT 1 /* Route installed by ICMP redirects; 194 not used by current IPv4 */ 195#define RTPROT_KERNEL 2 /* Route installed by kernel */ 196#define RTPROT_BOOT 3 /* Route installed during boot */ 197#define RTPROT_STATIC 4 /* Route installed by administrator */ 198 199/* Values of protocol >= RTPROT_STATIC are not interpreted by kernel; 200 they are just passed from user and back as is. 201 It will be used by hypothetical multiple routing daemons. 202 Note that protocol values should be standardized in order to 203 avoid conflicts. 204 */ 205 206#define RTPROT_GATED 8 /* Apparently, GateD */ 207#define RTPROT_RA 9 /* RDISC/ND router advertisements */ 208#define RTPROT_MRT 10 /* Merit MRT */ 209#define RTPROT_ZEBRA 11 /* Zebra */ 210#define RTPROT_BIRD 12 /* BIRD */ 211#define RTPROT_DNROUTED 13 /* DECnet routing daemon */ 212#define RTPROT_XORP 14 /* XORP */ 213#define RTPROT_NTK 15 /* Netsukuku */ 214 215/* rtm_scope 216 217 Really it is not scope, but sort of distance to the destination. 218 NOWHERE are reserved for not existing destinations, HOST is our 219 local addresses, LINK are destinations, located on directly attached 220 link and UNIVERSE is everywhere in the Universe. 221 222 Intermediate values are also possible f.e. interior routes 223 could be assigned a value between UNIVERSE and LINK. 224*/ 225 226enum rt_scope_t 227{ 228 RT_SCOPE_UNIVERSE=0, 229/* User defined values */ 230 RT_SCOPE_SITE=200, 231 RT_SCOPE_LINK=253, 232 RT_SCOPE_HOST=254, 233 RT_SCOPE_NOWHERE=255 234}; 235 236/* rtm_flags */ 237 238#define RTM_F_NOTIFY 0x100 /* Notify user of route change */ 239#define RTM_F_CLONED 0x200 /* This route is cloned */ 240#define RTM_F_EQUALIZE 0x400 /* Multipath equalizer: NI */ 241#define RTM_F_PREFIX 0x800 /* Prefix addresses */ 242 243/* Reserved table identifiers */ 244 245enum rt_class_t 246{ 247 RT_TABLE_UNSPEC=0, 248/* User defined values */ 249 RT_TABLE_COMPAT=252, 250 RT_TABLE_DEFAULT=253, 251 RT_TABLE_MAIN=254, 252 RT_TABLE_LOCAL=255, 253 RT_TABLE_MAX=0xFFFFFFFF 254}; 255 256 257/* Routing message attributes */ 258 259enum rtattr_type_t 260{ 261 RTA_UNSPEC, 262 RTA_DST, 263 RTA_SRC, 264 RTA_IIF, 265 RTA_OIF, 266 RTA_GATEWAY, 267 RTA_PRIORITY, 268 RTA_PREFSRC, 269 RTA_METRICS, 270 RTA_MULTIPATH, 271 RTA_PROTOINFO, /* no longer used */ 272 RTA_FLOW, 273 RTA_CACHEINFO, 274 RTA_SESSION, /* no longer used */ 275 RTA_MP_ALGO, /* no longer used */ 276 RTA_TABLE, 277 __RTA_MAX 278}; 279 280#define RTA_MAX (__RTA_MAX - 1) 281 282#define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg)))) 283#define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg)) 284 285/* RTM_MULTIPATH --- array of struct rtnexthop. 286 * 287 * "struct rtnexthop" describes all necessary nexthop information, 288 * i.e. parameters of path to a destination via this nexthop. 289 * 290 * At the moment it is impossible to set different prefsrc, mtu, window 291 * and rtt for different paths from multipath. 292 */ 293 294struct rtnexthop 295{ 296 unsigned short rtnh_len; 297 unsigned char rtnh_flags; 298 unsigned char rtnh_hops; 299 int rtnh_ifindex; 300}; 301 302/* rtnh_flags */ 303 304#define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */ 305#define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */ 306#define RTNH_F_ONLINK 4 /* Gateway is forced on link */ 307 308/* Macros to handle hexthops */ 309 310#define RTNH_ALIGNTO 4 311#define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) ) 312#define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \ 313 ((int)(rtnh)->rtnh_len) <= (len)) 314#define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len))) 315#define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len)) 316#define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len)) 317#define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0))) 318 319/* RTM_CACHEINFO */ 320 321struct rta_cacheinfo 322{ 323 __u32 rta_clntref; 324 __u32 rta_lastuse; 325 __s32 rta_expires; 326 __u32 rta_error; 327 __u32 rta_used; 328 329#define RTNETLINK_HAVE_PEERINFO 1 330 __u32 rta_id; 331 __u32 rta_ts; 332 __u32 rta_tsage; 333}; 334 335/* RTM_METRICS --- array of struct rtattr with types of RTAX_* */ 336 337enum 338{ 339 RTAX_UNSPEC, 340#define RTAX_UNSPEC RTAX_UNSPEC 341 RTAX_LOCK, 342#define RTAX_LOCK RTAX_LOCK 343 RTAX_MTU, 344#define RTAX_MTU RTAX_MTU 345 RTAX_WINDOW, 346#define RTAX_WINDOW RTAX_WINDOW 347 RTAX_RTT, 348#define RTAX_RTT RTAX_RTT 349 RTAX_RTTVAR, 350#define RTAX_RTTVAR RTAX_RTTVAR 351 RTAX_SSTHRESH, 352#define RTAX_SSTHRESH RTAX_SSTHRESH 353 RTAX_CWND, 354#define RTAX_CWND RTAX_CWND 355 RTAX_ADVMSS, 356#define RTAX_ADVMSS RTAX_ADVMSS 357 RTAX_REORDERING, 358#define RTAX_REORDERING RTAX_REORDERING 359 RTAX_HOPLIMIT, 360#define RTAX_HOPLIMIT RTAX_HOPLIMIT 361 RTAX_INITCWND, 362#define RTAX_INITCWND RTAX_INITCWND 363 RTAX_FEATURES, 364#define RTAX_FEATURES RTAX_FEATURES 365 RTAX_RTO_MIN, 366#define RTAX_RTO_MIN RTAX_RTO_MIN 367 __RTAX_MAX 368}; 369 370#define RTAX_MAX (__RTAX_MAX - 1) 371 372#define RTAX_FEATURE_ECN 0x00000001 373#define RTAX_FEATURE_SACK 0x00000002 374#define RTAX_FEATURE_TIMESTAMP 0x00000004 375#define RTAX_FEATURE_ALLFRAG 0x00000008 376 377struct rta_session 378{ 379 __u8 proto; 380 __u8 pad1; 381 __u16 pad2; 382 383 union { 384 struct { 385 __u16 sport; 386 __u16 dport; 387 } ports; 388 389 struct { 390 __u8 type; 391 __u8 code; 392 __u16 ident; 393 } icmpt; 394 395 __u32 spi; 396 } u; 397}; 398 399/**** 400 * General form of address family dependent message. 401 ****/ 402 403struct rtgenmsg 404{ 405 unsigned char rtgen_family; 406}; 407 408/***************************************************************** 409 * Link layer specific messages. 410 ****/ 411 412/* struct ifinfomsg 413 * passes link level specific information, not dependent 414 * on network protocol. 415 */ 416 417struct ifinfomsg 418{ 419 unsigned char ifi_family; 420 unsigned char __ifi_pad; 421 unsigned short ifi_type; /* ARPHRD_* */ 422 int ifi_index; /* Link index */ 423 unsigned ifi_flags; /* IFF_* flags */ 424 unsigned ifi_change; /* IFF_* change mask */ 425}; 426 427/******************************************************************** 428 * prefix information 429 ****/ 430 431struct prefixmsg 432{ 433 unsigned char prefix_family; 434 unsigned char prefix_pad1; 435 unsigned short prefix_pad2; 436 int prefix_ifindex; 437 unsigned char prefix_type; 438 unsigned char prefix_len; 439 unsigned char prefix_flags; 440 unsigned char prefix_pad3; 441}; 442 443enum 444{ 445 PREFIX_UNSPEC, 446 PREFIX_ADDRESS, 447 PREFIX_CACHEINFO, 448 __PREFIX_MAX 449}; 450 451#define PREFIX_MAX (__PREFIX_MAX - 1) 452 453struct prefix_cacheinfo 454{ 455 __u32 preferred_time; 456 __u32 valid_time; 457}; 458 459 460/***************************************************************** 461 * Traffic control messages. 462 ****/ 463 464struct tcmsg 465{ 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 475enum 476{ 477 TCA_UNSPEC, 478 TCA_KIND, 479 TCA_OPTIONS, 480 TCA_STATS, 481 TCA_XSTATS, 482 TCA_RATE, 483 TCA_FCNT, 484 TCA_STATS2, 485 TCA_STAB, 486 __TCA_MAX 487}; 488 489#define TCA_MAX (__TCA_MAX - 1) 490 491#define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg)))) 492#define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg)) 493 494/******************************************************************** 495 * Neighbor Discovery userland options 496 ****/ 497 498struct nduseroptmsg 499{ 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 511enum 512{ 513 NDUSEROPT_UNSPEC, 514 NDUSEROPT_SRCADDR, 515 __NDUSEROPT_MAX 516}; 517 518#define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1) 519 520/* 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 540 541/* RTnetlink multicast groups */ 542enum rtnetlink_groups { 543 RTNLGRP_NONE, 544#define RTNLGRP_NONE RTNLGRP_NONE 545 RTNLGRP_LINK, 546#define RTNLGRP_LINK RTNLGRP_LINK 547 RTNLGRP_NOTIFY, 548#define RTNLGRP_NOTIFY RTNLGRP_NOTIFY 549 RTNLGRP_NEIGH, 550#define RTNLGRP_NEIGH RTNLGRP_NEIGH 551 RTNLGRP_TC, 552#define RTNLGRP_TC RTNLGRP_TC 553 RTNLGRP_IPV4_IFADDR, 554#define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR 555 RTNLGRP_IPV4_MROUTE, 556#define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE 557 RTNLGRP_IPV4_ROUTE, 558#define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE 559 RTNLGRP_IPV4_RULE, 560#define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE 561 RTNLGRP_IPV6_IFADDR, 562#define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR 563 RTNLGRP_IPV6_MROUTE, 564#define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE 565 RTNLGRP_IPV6_ROUTE, 566#define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE 567 RTNLGRP_IPV6_IFINFO, 568#define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO 569 RTNLGRP_DECnet_IFADDR, 570#define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR 571 RTNLGRP_NOP2, 572 RTNLGRP_DECnet_ROUTE, 573#define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE 574 RTNLGRP_DECnet_RULE, 575#define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE 576 RTNLGRP_NOP4, 577 RTNLGRP_IPV6_PREFIX, 578#define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX 579 RTNLGRP_IPV6_RULE, 580#define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE 581 RTNLGRP_ND_USEROPT, 582#define RTNLGRP_ND_USEROPT RTNLGRP_ND_USEROPT 583 RTNLGRP_PHONET_IFADDR, 584#define RTNLGRP_PHONET_IFADDR RTNLGRP_PHONET_IFADDR 585 RTNLGRP_PHONET_ROUTE, 586#define RTNLGRP_PHONET_ROUTE RTNLGRP_PHONET_ROUTE 587 __RTNLGRP_MAX 588}; 589#define RTNLGRP_MAX (__RTNLGRP_MAX - 1) 590 591/* TC action piece */ 592struct tcamsg 593{ 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 */ 604 605 606 607#endif /* __LINUX_RTNETLINK_H */ 608