rtnetlink.h revision 1a441f49ec87ef74b978d7ae17da2a9b2ca6e811
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 23enum { 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 137struct 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 163struct 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 179enum { 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 237enum 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 255enum 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 268enum 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_MAX 286}; 287 288#define RTA_MAX (__RTA_MAX - 1) 289 290#define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg)))) 291#define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg)) 292 293/* RTM_MULTIPATH --- array of struct rtnexthop. 294 * 295 * "struct rtnexthop" describes all necessary nexthop information, 296 * i.e. parameters of path to a destination via this nexthop. 297 * 298 * At the moment it is impossible to set different prefsrc, mtu, window 299 * and rtt for different paths from multipath. 300 */ 301 302struct rtnexthop { 303 unsigned short rtnh_len; 304 unsigned char rtnh_flags; 305 unsigned char rtnh_hops; 306 int rtnh_ifindex; 307}; 308 309/* rtnh_flags */ 310 311#define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */ 312#define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */ 313#define RTNH_F_ONLINK 4 /* Gateway is forced on link */ 314 315/* Macros to handle hexthops */ 316 317#define RTNH_ALIGNTO 4 318#define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) ) 319#define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \ 320 ((int)(rtnh)->rtnh_len) <= (len)) 321#define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len))) 322#define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len)) 323#define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len)) 324#define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0))) 325 326/* RTM_CACHEINFO */ 327 328struct rta_cacheinfo { 329 __u32 rta_clntref; 330 __u32 rta_lastuse; 331 __s32 rta_expires; 332 __u32 rta_error; 333 __u32 rta_used; 334 335#define RTNETLINK_HAVE_PEERINFO 1 336 __u32 rta_id; 337 __u32 rta_ts; 338 __u32 rta_tsage; 339}; 340 341/* RTM_METRICS --- array of struct rtattr with types of RTAX_* */ 342 343enum { 344 RTAX_UNSPEC, 345#define RTAX_UNSPEC RTAX_UNSPEC 346 RTAX_LOCK, 347#define RTAX_LOCK RTAX_LOCK 348 RTAX_MTU, 349#define RTAX_MTU RTAX_MTU 350 RTAX_WINDOW, 351#define RTAX_WINDOW RTAX_WINDOW 352 RTAX_RTT, 353#define RTAX_RTT RTAX_RTT 354 RTAX_RTTVAR, 355#define RTAX_RTTVAR RTAX_RTTVAR 356 RTAX_SSTHRESH, 357#define RTAX_SSTHRESH RTAX_SSTHRESH 358 RTAX_CWND, 359#define RTAX_CWND RTAX_CWND 360 RTAX_ADVMSS, 361#define RTAX_ADVMSS RTAX_ADVMSS 362 RTAX_REORDERING, 363#define RTAX_REORDERING RTAX_REORDERING 364 RTAX_HOPLIMIT, 365#define RTAX_HOPLIMIT RTAX_HOPLIMIT 366 RTAX_INITCWND, 367#define RTAX_INITCWND RTAX_INITCWND 368 RTAX_FEATURES, 369#define RTAX_FEATURES RTAX_FEATURES 370 RTAX_RTO_MIN, 371#define RTAX_RTO_MIN RTAX_RTO_MIN 372 RTAX_INITRWND, 373#define RTAX_INITRWND RTAX_INITRWND 374 __RTAX_MAX 375}; 376 377#define RTAX_MAX (__RTAX_MAX - 1) 378 379#define RTAX_FEATURE_ECN 0x00000001 380#define RTAX_FEATURE_SACK 0x00000002 381#define RTAX_FEATURE_TIMESTAMP 0x00000004 382#define RTAX_FEATURE_ALLFRAG 0x00000008 383 384struct rta_session { 385 __u8 proto; 386 __u8 pad1; 387 __u16 pad2; 388 389 union { 390 struct { 391 __u16 sport; 392 __u16 dport; 393 } ports; 394 395 struct { 396 __u8 type; 397 __u8 code; 398 __u16 ident; 399 } icmpt; 400 401 __u32 spi; 402 } u; 403}; 404 405/**** 406 * General form of address family dependent message. 407 ****/ 408 409struct rtgenmsg { 410 unsigned char rtgen_family; 411}; 412 413/***************************************************************** 414 * Link layer specific messages. 415 ****/ 416 417/* struct ifinfomsg 418 * passes link level specific information, not dependent 419 * on network protocol. 420 */ 421 422struct ifinfomsg { 423 unsigned char ifi_family; 424 unsigned char __ifi_pad; 425 unsigned short ifi_type; /* ARPHRD_* */ 426 int ifi_index; /* Link index */ 427 unsigned ifi_flags; /* IFF_* flags */ 428 unsigned ifi_change; /* IFF_* change mask */ 429}; 430 431/******************************************************************** 432 * prefix information 433 ****/ 434 435struct prefixmsg { 436 unsigned char prefix_family; 437 unsigned char prefix_pad1; 438 unsigned short prefix_pad2; 439 int prefix_ifindex; 440 unsigned char prefix_type; 441 unsigned char prefix_len; 442 unsigned char prefix_flags; 443 unsigned char prefix_pad3; 444}; 445 446enum 447{ 448 PREFIX_UNSPEC, 449 PREFIX_ADDRESS, 450 PREFIX_CACHEINFO, 451 __PREFIX_MAX 452}; 453 454#define PREFIX_MAX (__PREFIX_MAX - 1) 455 456struct prefix_cacheinfo { 457 __u32 preferred_time; 458 __u32 valid_time; 459}; 460 461 462/***************************************************************** 463 * Traffic control messages. 464 ****/ 465 466struct tcmsg { 467 unsigned char tcm_family; 468 unsigned char tcm__pad1; 469 unsigned short tcm__pad2; 470 int tcm_ifindex; 471 __u32 tcm_handle; 472 __u32 tcm_parent; 473 __u32 tcm_info; 474}; 475 476enum { 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 unsigned char nduseropt_family; 500 unsigned char nduseropt_pad1; 501 unsigned short nduseropt_opts_len; /* Total length of options */ 502 int nduseropt_ifindex; 503 __u8 nduseropt_icmp_type; 504 __u8 nduseropt_icmp_code; 505 unsigned short nduseropt_pad2; 506 unsigned int nduseropt_pad3; 507 /* Followed by one or more ND options */ 508}; 509 510enum { 511 NDUSEROPT_UNSPEC, 512 NDUSEROPT_SRCADDR, 513 __NDUSEROPT_MAX 514}; 515 516#define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1) 517 518/* RTnetlink multicast groups - backwards compatibility for userspace */ 519#define RTMGRP_LINK 1 520#define RTMGRP_NOTIFY 2 521#define RTMGRP_NEIGH 4 522#define RTMGRP_TC 8 523 524#define RTMGRP_IPV4_IFADDR 0x10 525#define RTMGRP_IPV4_MROUTE 0x20 526#define RTMGRP_IPV4_ROUTE 0x40 527#define RTMGRP_IPV4_RULE 0x80 528 529#define RTMGRP_IPV6_IFADDR 0x100 530#define RTMGRP_IPV6_MROUTE 0x200 531#define RTMGRP_IPV6_ROUTE 0x400 532#define RTMGRP_IPV6_IFINFO 0x800 533 534#define RTMGRP_DECnet_IFADDR 0x1000 535#define RTMGRP_DECnet_ROUTE 0x4000 536 537#define RTMGRP_IPV6_PREFIX 0x20000 538 539/* RTnetlink multicast groups */ 540enum rtnetlink_groups { 541 RTNLGRP_NONE, 542#define RTNLGRP_NONE RTNLGRP_NONE 543 RTNLGRP_LINK, 544#define RTNLGRP_LINK RTNLGRP_LINK 545 RTNLGRP_NOTIFY, 546#define RTNLGRP_NOTIFY RTNLGRP_NOTIFY 547 RTNLGRP_NEIGH, 548#define RTNLGRP_NEIGH RTNLGRP_NEIGH 549 RTNLGRP_TC, 550#define RTNLGRP_TC RTNLGRP_TC 551 RTNLGRP_IPV4_IFADDR, 552#define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR 553 RTNLGRP_IPV4_MROUTE, 554#define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE 555 RTNLGRP_IPV4_ROUTE, 556#define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE 557 RTNLGRP_IPV4_RULE, 558#define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE 559 RTNLGRP_IPV6_IFADDR, 560#define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR 561 RTNLGRP_IPV6_MROUTE, 562#define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE 563 RTNLGRP_IPV6_ROUTE, 564#define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE 565 RTNLGRP_IPV6_IFINFO, 566#define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO 567 RTNLGRP_DECnet_IFADDR, 568#define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR 569 RTNLGRP_NOP2, 570 RTNLGRP_DECnet_ROUTE, 571#define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE 572 RTNLGRP_DECnet_RULE, 573#define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE 574 RTNLGRP_NOP4, 575 RTNLGRP_IPV6_PREFIX, 576#define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX 577 RTNLGRP_IPV6_RULE, 578#define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE 579 RTNLGRP_ND_USEROPT, 580#define RTNLGRP_ND_USEROPT RTNLGRP_ND_USEROPT 581 RTNLGRP_PHONET_IFADDR, 582#define RTNLGRP_PHONET_IFADDR RTNLGRP_PHONET_IFADDR 583 RTNLGRP_PHONET_ROUTE, 584#define RTNLGRP_PHONET_ROUTE RTNLGRP_PHONET_ROUTE 585 __RTNLGRP_MAX 586}; 587#define RTNLGRP_MAX (__RTNLGRP_MAX - 1) 588 589/* TC action piece */ 590struct tcamsg { 591 unsigned char tca_family; 592 unsigned char tca__pad1; 593 unsigned short tca__pad2; 594}; 595#define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg)))) 596#define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg)) 597#define TCA_ACT_TAB 1 /* attr type must be >=1 */ 598#define TCAA_MAX 1 599 600/* End of information exported to user level */ 601 602 603 604#endif /* __LINUX_RTNETLINK_H */ 605