rtnetlink.h revision ead2ba7008c9db02954dae6f180aed8770a0560d
1#ifndef __LINUX_RTNETLINK_H 2#define __LINUX_RTNETLINK_H 3 4#include <linux/netlink.h> 5#include <linux/if_link.h> 6 7/**** 8 * Routing/neighbour discovery messages. 9 ****/ 10 11/* Types of messages */ 12 13enum { 14 RTM_BASE = 16, 15#define RTM_BASE RTM_BASE 16 17 RTM_NEWLINK = 16, 18#define RTM_NEWLINK RTM_NEWLINK 19 RTM_DELLINK, 20#define RTM_DELLINK RTM_DELLINK 21 RTM_GETLINK, 22#define RTM_GETLINK RTM_GETLINK 23 RTM_SETLINK, 24#define RTM_SETLINK RTM_SETLINK 25 26 RTM_NEWADDR = 20, 27#define RTM_NEWADDR RTM_NEWADDR 28 RTM_DELADDR, 29#define RTM_DELADDR RTM_DELADDR 30 RTM_GETADDR, 31#define RTM_GETADDR RTM_GETADDR 32 33 RTM_NEWROUTE = 24, 34#define RTM_NEWROUTE RTM_NEWROUTE 35 RTM_DELROUTE, 36#define RTM_DELROUTE RTM_DELROUTE 37 RTM_GETROUTE, 38#define RTM_GETROUTE RTM_GETROUTE 39 40 RTM_NEWNEIGH = 28, 41#define RTM_NEWNEIGH RTM_NEWNEIGH 42 RTM_DELNEIGH, 43#define RTM_DELNEIGH RTM_DELNEIGH 44 RTM_GETNEIGH, 45#define RTM_GETNEIGH RTM_GETNEIGH 46 47 RTM_NEWRULE = 32, 48#define RTM_NEWRULE RTM_NEWRULE 49 RTM_DELRULE, 50#define RTM_DELRULE RTM_DELRULE 51 RTM_GETRULE, 52#define RTM_GETRULE RTM_GETRULE 53 54 RTM_NEWQDISC = 36, 55#define RTM_NEWQDISC RTM_NEWQDISC 56 RTM_DELQDISC, 57#define RTM_DELQDISC RTM_DELQDISC 58 RTM_GETQDISC, 59#define RTM_GETQDISC RTM_GETQDISC 60 61 RTM_NEWTCLASS = 40, 62#define RTM_NEWTCLASS RTM_NEWTCLASS 63 RTM_DELTCLASS, 64#define RTM_DELTCLASS RTM_DELTCLASS 65 RTM_GETTCLASS, 66#define RTM_GETTCLASS RTM_GETTCLASS 67 68 RTM_NEWTFILTER = 44, 69#define RTM_NEWTFILTER RTM_NEWTFILTER 70 RTM_DELTFILTER, 71#define RTM_DELTFILTER RTM_DELTFILTER 72 RTM_GETTFILTER, 73#define RTM_GETTFILTER RTM_GETTFILTER 74 75 RTM_NEWACTION = 48, 76#define RTM_NEWACTION RTM_NEWACTION 77 RTM_DELACTION, 78#define RTM_DELACTION RTM_DELACTION 79 RTM_GETACTION, 80#define RTM_GETACTION RTM_GETACTION 81 82 RTM_NEWPREFIX = 52, 83#define RTM_NEWPREFIX RTM_NEWPREFIX 84 85 RTM_GETMULTICAST = 58, 86#define RTM_GETMULTICAST RTM_GETMULTICAST 87 88 RTM_GETANYCAST = 62, 89#define RTM_GETANYCAST RTM_GETANYCAST 90 91 RTM_NEWNEIGHTBL = 64, 92#define RTM_NEWNEIGHTBL RTM_NEWNEIGHTBL 93 RTM_GETNEIGHTBL = 66, 94#define RTM_GETNEIGHTBL RTM_GETNEIGHTBL 95 RTM_SETNEIGHTBL, 96#define RTM_SETNEIGHTBL RTM_SETNEIGHTBL 97 98 __RTM_MAX, 99#define RTM_MAX (((__RTM_MAX + 3) & ~3) - 1) 100}; 101 102#define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE) 103#define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2) 104#define RTM_FAM(cmd) (((cmd) - RTM_BASE) >> 2) 105 106/* 107 Generic structure for encapsulation of optional route information. 108 It is reminiscent of sockaddr, but with sa_family replaced 109 with attribute type. 110 */ 111 112struct rtattr 113{ 114 unsigned short rta_len; 115 unsigned short rta_type; 116}; 117 118/* Macros to handle rtattributes */ 119 120#define RTA_ALIGNTO 4 121#define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) ) 122#define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \ 123 (rta)->rta_len >= sizeof(struct rtattr) && \ 124 (rta)->rta_len <= (len)) 125#define RTA_NEXT(rta,attrlen) ((attrlen) -= RTA_ALIGN((rta)->rta_len), \ 126 (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len))) 127#define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len)) 128#define RTA_SPACE(len) RTA_ALIGN(RTA_LENGTH(len)) 129#define RTA_DATA(rta) ((void*)(((char*)(rta)) + RTA_LENGTH(0))) 130#define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0)) 131 132 133 134 135/****************************************************************************** 136 * Definitions used in routing table administration. 137 ****/ 138 139struct rtmsg 140{ 141 unsigned char rtm_family; 142 unsigned char rtm_dst_len; 143 unsigned char rtm_src_len; 144 unsigned char rtm_tos; 145 146 unsigned char rtm_table; /* Routing table id */ 147 unsigned char rtm_protocol; /* Routing protocol; see below */ 148 unsigned char rtm_scope; /* See below */ 149 unsigned char rtm_type; /* See below */ 150 151 unsigned rtm_flags; 152}; 153 154/* rtm_type */ 155 156enum 157{ 158 RTN_UNSPEC, 159 RTN_UNICAST, /* Gateway or direct route */ 160 RTN_LOCAL, /* Accept locally */ 161 RTN_BROADCAST, /* Accept locally as broadcast, 162 send as broadcast */ 163 RTN_ANYCAST, /* Accept locally as broadcast, 164 but send as unicast */ 165 RTN_MULTICAST, /* Multicast route */ 166 RTN_BLACKHOLE, /* Drop */ 167 RTN_UNREACHABLE, /* Destination is unreachable */ 168 RTN_PROHIBIT, /* Administratively prohibited */ 169 RTN_THROW, /* Not in this table */ 170 RTN_NAT, /* Translate this address */ 171 RTN_XRESOLVE, /* Use external resolver */ 172 __RTN_MAX 173}; 174 175#define RTN_MAX (__RTN_MAX - 1) 176 177 178/* rtm_protocol */ 179 180#define RTPROT_UNSPEC 0 181#define RTPROT_REDIRECT 1 /* Route installed by ICMP redirects; 182 not used by current IPv4 */ 183#define RTPROT_KERNEL 2 /* Route installed by kernel */ 184#define RTPROT_BOOT 3 /* Route installed during boot */ 185#define RTPROT_STATIC 4 /* Route installed by administrator */ 186 187/* Values of protocol >= RTPROT_STATIC are not interpreted by kernel; 188 they are just passed from user and back as is. 189 It will be used by hypothetical multiple routing daemons. 190 Note that protocol values should be standardized in order to 191 avoid conflicts. 192 */ 193 194#define RTPROT_GATED 8 /* Apparently, GateD */ 195#define RTPROT_RA 9 /* RDISC/ND router advertisements */ 196#define RTPROT_MRT 10 /* Merit MRT */ 197#define RTPROT_ZEBRA 11 /* Zebra */ 198#define RTPROT_BIRD 12 /* BIRD */ 199#define RTPROT_DNROUTED 13 /* DECnet routing daemon */ 200#define RTPROT_XORP 14 /* XORP */ 201#define RTPROT_NTK 15 /* Netsukuku */ 202 203/* rtm_scope 204 205 Really it is not scope, but sort of distance to the destination. 206 NOWHERE are reserved for not existing destinations, HOST is our 207 local addresses, LINK are destinations, located on directly attached 208 link and UNIVERSE is everywhere in the Universe. 209 210 Intermediate values are also possible f.e. interior routes 211 could be assigned a value between UNIVERSE and LINK. 212*/ 213 214enum rt_scope_t 215{ 216 RT_SCOPE_UNIVERSE=0, 217/* User defined values */ 218 RT_SCOPE_SITE=200, 219 RT_SCOPE_LINK=253, 220 RT_SCOPE_HOST=254, 221 RT_SCOPE_NOWHERE=255 222}; 223 224/* rtm_flags */ 225 226#define RTM_F_NOTIFY 0x100 /* Notify user of route change */ 227#define RTM_F_CLONED 0x200 /* This route is cloned */ 228#define RTM_F_EQUALIZE 0x400 /* Multipath equalizer: NI */ 229#define RTM_F_PREFIX 0x800 /* Prefix addresses */ 230 231/* Reserved table identifiers */ 232 233enum rt_class_t 234{ 235 RT_TABLE_UNSPEC=0, 236/* User defined values */ 237 RT_TABLE_DEFAULT=253, 238 RT_TABLE_MAIN=254, 239 RT_TABLE_LOCAL=255, 240 RT_TABLE_MAX=0xFFFFFFFF 241}; 242 243 244/* Routing message attributes */ 245 246enum rtattr_type_t 247{ 248 RTA_UNSPEC, 249 RTA_DST, 250 RTA_SRC, 251 RTA_IIF, 252 RTA_OIF, 253 RTA_GATEWAY, 254 RTA_PRIORITY, 255 RTA_PREFSRC, 256 RTA_METRICS, 257 RTA_MULTIPATH, 258 RTA_PROTOINFO, 259 RTA_FLOW, 260 RTA_CACHEINFO, 261 RTA_SESSION, 262 RTA_MP_ALGO, 263 RTA_TABLE, 264 __RTA_MAX 265}; 266 267#define RTA_MAX (__RTA_MAX - 1) 268 269#define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg)))) 270#define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg)) 271 272/* RTM_MULTIPATH --- array of struct rtnexthop. 273 * 274 * "struct rtnexthop" describes all necessary nexthop information, 275 * i.e. parameters of path to a destination via this nexthop. 276 * 277 * At the moment it is impossible to set different prefsrc, mtu, window 278 * and rtt for different paths from multipath. 279 */ 280 281struct rtnexthop 282{ 283 unsigned short rtnh_len; 284 unsigned char rtnh_flags; 285 unsigned char rtnh_hops; 286 int rtnh_ifindex; 287}; 288 289/* rtnh_flags */ 290 291#define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */ 292#define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */ 293#define RTNH_F_ONLINK 4 /* Gateway is forced on link */ 294 295/* Macros to handle hexthops */ 296 297#define RTNH_ALIGNTO 4 298#define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) ) 299#define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \ 300 ((int)(rtnh)->rtnh_len) <= (len)) 301#define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len))) 302#define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len)) 303#define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len)) 304#define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0))) 305 306/* RTM_CACHEINFO */ 307 308struct rta_cacheinfo 309{ 310 __u32 rta_clntref; 311 __u32 rta_lastuse; 312 __s32 rta_expires; 313 __u32 rta_error; 314 __u32 rta_used; 315 316#define RTNETLINK_HAVE_PEERINFO 1 317 __u32 rta_id; 318 __u32 rta_ts; 319 __u32 rta_tsage; 320}; 321 322/* RTM_METRICS --- array of struct rtattr with types of RTAX_* */ 323 324enum 325{ 326 RTAX_UNSPEC, 327#define RTAX_UNSPEC RTAX_UNSPEC 328 RTAX_LOCK, 329#define RTAX_LOCK RTAX_LOCK 330 RTAX_MTU, 331#define RTAX_MTU RTAX_MTU 332 RTAX_WINDOW, 333#define RTAX_WINDOW RTAX_WINDOW 334 RTAX_RTT, 335#define RTAX_RTT RTAX_RTT 336 RTAX_RTTVAR, 337#define RTAX_RTTVAR RTAX_RTTVAR 338 RTAX_SSTHRESH, 339#define RTAX_SSTHRESH RTAX_SSTHRESH 340 RTAX_CWND, 341#define RTAX_CWND RTAX_CWND 342 RTAX_ADVMSS, 343#define RTAX_ADVMSS RTAX_ADVMSS 344 RTAX_REORDERING, 345#define RTAX_REORDERING RTAX_REORDERING 346 RTAX_HOPLIMIT, 347#define RTAX_HOPLIMIT RTAX_HOPLIMIT 348 RTAX_INITCWND, 349#define RTAX_INITCWND RTAX_INITCWND 350 RTAX_FEATURES, 351#define RTAX_FEATURES RTAX_FEATURES 352 __RTAX_MAX 353}; 354 355#define RTAX_MAX (__RTAX_MAX - 1) 356 357#define RTAX_FEATURE_ECN 0x00000001 358#define RTAX_FEATURE_SACK 0x00000002 359#define RTAX_FEATURE_TIMESTAMP 0x00000004 360#define RTAX_FEATURE_ALLFRAG 0x00000008 361 362struct rta_session 363{ 364 __u8 proto; 365 __u8 pad1; 366 __u16 pad2; 367 368 union { 369 struct { 370 __u16 sport; 371 __u16 dport; 372 } ports; 373 374 struct { 375 __u8 type; 376 __u8 code; 377 __u16 ident; 378 } icmpt; 379 380 __u32 spi; 381 } u; 382}; 383 384/**** 385 * General form of address family dependent message. 386 ****/ 387 388struct rtgenmsg 389{ 390 unsigned char rtgen_family; 391}; 392 393/***************************************************************** 394 * Link layer specific messages. 395 ****/ 396 397/* struct ifinfomsg 398 * passes link level specific information, not dependent 399 * on network protocol. 400 */ 401 402struct ifinfomsg 403{ 404 unsigned char ifi_family; 405 unsigned char __ifi_pad; 406 unsigned short ifi_type; /* ARPHRD_* */ 407 int ifi_index; /* Link index */ 408 unsigned ifi_flags; /* IFF_* flags */ 409 unsigned ifi_change; /* IFF_* change mask */ 410}; 411 412/******************************************************************** 413 * prefix information 414 ****/ 415 416struct prefixmsg 417{ 418 unsigned char prefix_family; 419 unsigned char prefix_pad1; 420 unsigned short prefix_pad2; 421 int prefix_ifindex; 422 unsigned char prefix_type; 423 unsigned char prefix_len; 424 unsigned char prefix_flags; 425 unsigned char prefix_pad3; 426}; 427 428enum 429{ 430 PREFIX_UNSPEC, 431 PREFIX_ADDRESS, 432 PREFIX_CACHEINFO, 433 __PREFIX_MAX 434}; 435 436#define PREFIX_MAX (__PREFIX_MAX - 1) 437 438struct prefix_cacheinfo 439{ 440 __u32 preferred_time; 441 __u32 valid_time; 442}; 443 444 445/***************************************************************** 446 * Traffic control messages. 447 ****/ 448 449struct tcmsg 450{ 451 unsigned char tcm_family; 452 unsigned char tcm__pad1; 453 unsigned short tcm__pad2; 454 int tcm_ifindex; 455 __u32 tcm_handle; 456 __u32 tcm_parent; 457 __u32 tcm_info; 458}; 459 460enum 461{ 462 TCA_UNSPEC, 463 TCA_KIND, 464 TCA_OPTIONS, 465 TCA_STATS, 466 TCA_XSTATS, 467 TCA_RATE, 468 TCA_FCNT, 469 TCA_STATS2, 470 __TCA_MAX 471}; 472 473#define TCA_MAX (__TCA_MAX - 1) 474 475#define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg)))) 476#define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg)) 477 478/* RTnetlink multicast groups - backwards compatibility for userspace */ 479#define RTMGRP_LINK 1 480#define RTMGRP_NOTIFY 2 481#define RTMGRP_NEIGH 4 482#define RTMGRP_TC 8 483 484#define RTMGRP_IPV4_IFADDR 0x10 485#define RTMGRP_IPV4_MROUTE 0x20 486#define RTMGRP_IPV4_ROUTE 0x40 487#define RTMGRP_IPV4_RULE 0x80 488 489#define RTMGRP_IPV6_IFADDR 0x100 490#define RTMGRP_IPV6_MROUTE 0x200 491#define RTMGRP_IPV6_ROUTE 0x400 492#define RTMGRP_IPV6_IFINFO 0x800 493 494#define RTMGRP_DECnet_IFADDR 0x1000 495#define RTMGRP_DECnet_ROUTE 0x4000 496 497#define RTMGRP_IPV6_PREFIX 0x20000 498 499/* RTnetlink multicast groups */ 500enum rtnetlink_groups { 501 RTNLGRP_NONE, 502#define RTNLGRP_NONE RTNLGRP_NONE 503 RTNLGRP_LINK, 504#define RTNLGRP_LINK RTNLGRP_LINK 505 RTNLGRP_NOTIFY, 506#define RTNLGRP_NOTIFY RTNLGRP_NOTIFY 507 RTNLGRP_NEIGH, 508#define RTNLGRP_NEIGH RTNLGRP_NEIGH 509 RTNLGRP_TC, 510#define RTNLGRP_TC RTNLGRP_TC 511 RTNLGRP_IPV4_IFADDR, 512#define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR 513 RTNLGRP_IPV4_MROUTE, 514#define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE 515 RTNLGRP_IPV4_ROUTE, 516#define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE 517 RTNLGRP_IPV4_RULE, 518#define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE 519 RTNLGRP_IPV6_IFADDR, 520#define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR 521 RTNLGRP_IPV6_MROUTE, 522#define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE 523 RTNLGRP_IPV6_ROUTE, 524#define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE 525 RTNLGRP_IPV6_IFINFO, 526#define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO 527 RTNLGRP_DECnet_IFADDR, 528#define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR 529 RTNLGRP_NOP2, 530 RTNLGRP_DECnet_ROUTE, 531#define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE 532 RTNLGRP_DECnet_RULE, 533#define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE 534 RTNLGRP_NOP4, 535 RTNLGRP_IPV6_PREFIX, 536#define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX 537 RTNLGRP_IPV6_RULE, 538#define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE 539 __RTNLGRP_MAX 540}; 541#define RTNLGRP_MAX (__RTNLGRP_MAX - 1) 542 543/* TC action piece */ 544struct tcamsg 545{ 546 unsigned char tca_family; 547 unsigned char tca__pad1; 548 unsigned short tca__pad2; 549}; 550#define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg)))) 551#define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg)) 552#define TCA_ACT_TAB 1 /* attr type must be >=1 */ 553#define TCAA_MAX 1 554 555/* End of information exported to user level */ 556 557 558 559#endif /* __LINUX_RTNETLINK_H */ 560