rtnetlink.h revision be7f286e8353cc947c6d2a74b21989af23988812
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_MAX, 101#define RTM_MAX (((__RTM_MAX + 3) & ~3) - 1) 102}; 103 104#define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE) 105#define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2) 106#define RTM_FAM(cmd) (((cmd) - RTM_BASE) >> 2) 107 108/* 109 Generic structure for encapsulation of optional route information. 110 It is reminiscent of sockaddr, but with sa_family replaced 111 with attribute type. 112 */ 113 114struct rtattr 115{ 116 unsigned short rta_len; 117 unsigned short rta_type; 118}; 119 120/* Macros to handle rtattributes */ 121 122#define RTA_ALIGNTO 4 123#define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) ) 124#define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \ 125 (rta)->rta_len >= sizeof(struct rtattr) && \ 126 (rta)->rta_len <= (len)) 127#define RTA_NEXT(rta,attrlen) ((attrlen) -= RTA_ALIGN((rta)->rta_len), \ 128 (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len))) 129#define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len)) 130#define RTA_SPACE(len) RTA_ALIGN(RTA_LENGTH(len)) 131#define RTA_DATA(rta) ((void*)(((char*)(rta)) + RTA_LENGTH(0))) 132#define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0)) 133 134 135 136 137/****************************************************************************** 138 * Definitions used in routing table administration. 139 ****/ 140 141struct rtmsg 142{ 143 unsigned char rtm_family; 144 unsigned char rtm_dst_len; 145 unsigned char rtm_src_len; 146 unsigned char rtm_tos; 147 148 unsigned char rtm_table; /* Routing table id */ 149 unsigned char rtm_protocol; /* Routing protocol; see below */ 150 unsigned char rtm_scope; /* See below */ 151 unsigned char rtm_type; /* See below */ 152 153 unsigned rtm_flags; 154}; 155 156/* rtm_type */ 157 158enum 159{ 160 RTN_UNSPEC, 161 RTN_UNICAST, /* Gateway or direct route */ 162 RTN_LOCAL, /* Accept locally */ 163 RTN_BROADCAST, /* Accept locally as broadcast, 164 send as broadcast */ 165 RTN_ANYCAST, /* Accept locally as broadcast, 166 but send as unicast */ 167 RTN_MULTICAST, /* Multicast route */ 168 RTN_BLACKHOLE, /* Drop */ 169 RTN_UNREACHABLE, /* Destination is unreachable */ 170 RTN_PROHIBIT, /* Administratively prohibited */ 171 RTN_THROW, /* Not in this table */ 172 RTN_NAT, /* Translate this address */ 173 RTN_XRESOLVE, /* Use external resolver */ 174 __RTN_MAX 175}; 176 177#define RTN_MAX (__RTN_MAX - 1) 178 179 180/* rtm_protocol */ 181 182#define RTPROT_UNSPEC 0 183#define RTPROT_REDIRECT 1 /* Route installed by ICMP redirects; 184 not used by current IPv4 */ 185#define RTPROT_KERNEL 2 /* Route installed by kernel */ 186#define RTPROT_BOOT 3 /* Route installed during boot */ 187#define RTPROT_STATIC 4 /* Route installed by administrator */ 188 189/* Values of protocol >= RTPROT_STATIC are not interpreted by kernel; 190 they are just passed from user and back as is. 191 It will be used by hypothetical multiple routing daemons. 192 Note that protocol values should be standardized in order to 193 avoid conflicts. 194 */ 195 196#define RTPROT_GATED 8 /* Apparently, GateD */ 197#define RTPROT_RA 9 /* RDISC/ND router advertisements */ 198#define RTPROT_MRT 10 /* Merit MRT */ 199#define RTPROT_ZEBRA 11 /* Zebra */ 200#define RTPROT_BIRD 12 /* BIRD */ 201#define RTPROT_DNROUTED 13 /* DECnet routing daemon */ 202#define RTPROT_XORP 14 /* XORP */ 203#define RTPROT_NTK 15 /* Netsukuku */ 204 205/* rtm_scope 206 207 Really it is not scope, but sort of distance to the destination. 208 NOWHERE are reserved for not existing destinations, HOST is our 209 local addresses, LINK are destinations, located on directly attached 210 link and UNIVERSE is everywhere in the Universe. 211 212 Intermediate values are also possible f.e. interior routes 213 could be assigned a value between UNIVERSE and LINK. 214*/ 215 216enum rt_scope_t 217{ 218 RT_SCOPE_UNIVERSE=0, 219/* User defined values */ 220 RT_SCOPE_SITE=200, 221 RT_SCOPE_LINK=253, 222 RT_SCOPE_HOST=254, 223 RT_SCOPE_NOWHERE=255 224}; 225 226/* rtm_flags */ 227 228#define RTM_F_NOTIFY 0x100 /* Notify user of route change */ 229#define RTM_F_CLONED 0x200 /* This route is cloned */ 230#define RTM_F_EQUALIZE 0x400 /* Multipath equalizer: NI */ 231#define RTM_F_PREFIX 0x800 /* Prefix addresses */ 232 233/* Reserved table identifiers */ 234 235enum rt_class_t 236{ 237 RT_TABLE_UNSPEC=0, 238/* User defined values */ 239 RT_TABLE_DEFAULT=253, 240 RT_TABLE_MAIN=254, 241 RT_TABLE_LOCAL=255, 242 RT_TABLE_MAX=0xFFFFFFFF 243}; 244 245 246/* Routing message attributes */ 247 248enum rtattr_type_t 249{ 250 RTA_UNSPEC, 251 RTA_DST, 252 RTA_SRC, 253 RTA_IIF, 254 RTA_OIF, 255 RTA_GATEWAY, 256 RTA_PRIORITY, 257 RTA_PREFSRC, 258 RTA_METRICS, 259 RTA_MULTIPATH, 260 RTA_PROTOINFO, 261 RTA_FLOW, 262 RTA_CACHEINFO, 263 RTA_SESSION, 264 RTA_MP_ALGO, 265 RTA_TABLE, 266 RTA_FWMASK, 267 __RTA_MAX 268}; 269 270#define RTA_MAX (__RTA_MAX - 1) 271 272#define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg)))) 273#define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg)) 274 275/* RTM_MULTIPATH --- array of struct rtnexthop. 276 * 277 * "struct rtnexthop" describes all necessary nexthop information, 278 * i.e. parameters of path to a destination via this nexthop. 279 * 280 * At the moment it is impossible to set different prefsrc, mtu, window 281 * and rtt for different paths from multipath. 282 */ 283 284struct rtnexthop 285{ 286 unsigned short rtnh_len; 287 unsigned char rtnh_flags; 288 unsigned char rtnh_hops; 289 int rtnh_ifindex; 290}; 291 292/* rtnh_flags */ 293 294#define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */ 295#define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */ 296#define RTNH_F_ONLINK 4 /* Gateway is forced on link */ 297 298/* Macros to handle hexthops */ 299 300#define RTNH_ALIGNTO 4 301#define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) ) 302#define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \ 303 ((int)(rtnh)->rtnh_len) <= (len)) 304#define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len))) 305#define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len)) 306#define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len)) 307#define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0))) 308 309/* RTM_CACHEINFO */ 310 311struct rta_cacheinfo 312{ 313 __u32 rta_clntref; 314 __u32 rta_lastuse; 315 __s32 rta_expires; 316 __u32 rta_error; 317 __u32 rta_used; 318 319#define RTNETLINK_HAVE_PEERINFO 1 320 __u32 rta_id; 321 __u32 rta_ts; 322 __u32 rta_tsage; 323}; 324 325/* RTM_METRICS --- array of struct rtattr with types of RTAX_* */ 326 327enum 328{ 329 RTAX_UNSPEC, 330#define RTAX_UNSPEC RTAX_UNSPEC 331 RTAX_LOCK, 332#define RTAX_LOCK RTAX_LOCK 333 RTAX_MTU, 334#define RTAX_MTU RTAX_MTU 335 RTAX_WINDOW, 336#define RTAX_WINDOW RTAX_WINDOW 337 RTAX_RTT, 338#define RTAX_RTT RTAX_RTT 339 RTAX_RTTVAR, 340#define RTAX_RTTVAR RTAX_RTTVAR 341 RTAX_SSTHRESH, 342#define RTAX_SSTHRESH RTAX_SSTHRESH 343 RTAX_CWND, 344#define RTAX_CWND RTAX_CWND 345 RTAX_ADVMSS, 346#define RTAX_ADVMSS RTAX_ADVMSS 347 RTAX_REORDERING, 348#define RTAX_REORDERING RTAX_REORDERING 349 RTAX_HOPLIMIT, 350#define RTAX_HOPLIMIT RTAX_HOPLIMIT 351 RTAX_INITCWND, 352#define RTAX_INITCWND RTAX_INITCWND 353 RTAX_FEATURES, 354#define RTAX_FEATURES RTAX_FEATURES 355 __RTAX_MAX 356}; 357 358#define RTAX_MAX (__RTAX_MAX - 1) 359 360#define RTAX_FEATURE_ECN 0x00000001 361#define RTAX_FEATURE_SACK 0x00000002 362#define RTAX_FEATURE_TIMESTAMP 0x00000004 363#define RTAX_FEATURE_ALLFRAG 0x00000008 364 365struct rta_session 366{ 367 __u8 proto; 368 __u8 pad1; 369 __u16 pad2; 370 371 union { 372 struct { 373 __u16 sport; 374 __u16 dport; 375 } ports; 376 377 struct { 378 __u8 type; 379 __u8 code; 380 __u16 ident; 381 } icmpt; 382 383 __u32 spi; 384 } u; 385}; 386 387/**** 388 * General form of address family dependent message. 389 ****/ 390 391struct rtgenmsg 392{ 393 unsigned char rtgen_family; 394}; 395 396/***************************************************************** 397 * Link layer specific messages. 398 ****/ 399 400/* struct ifinfomsg 401 * passes link level specific information, not dependent 402 * on network protocol. 403 */ 404 405struct ifinfomsg 406{ 407 unsigned char ifi_family; 408 unsigned char __ifi_pad; 409 unsigned short ifi_type; /* ARPHRD_* */ 410 int ifi_index; /* Link index */ 411 unsigned ifi_flags; /* IFF_* flags */ 412 unsigned ifi_change; /* IFF_* change mask */ 413}; 414 415/******************************************************************** 416 * prefix information 417 ****/ 418 419struct prefixmsg 420{ 421 unsigned char prefix_family; 422 unsigned char prefix_pad1; 423 unsigned short prefix_pad2; 424 int prefix_ifindex; 425 unsigned char prefix_type; 426 unsigned char prefix_len; 427 unsigned char prefix_flags; 428 unsigned char prefix_pad3; 429}; 430 431enum 432{ 433 PREFIX_UNSPEC, 434 PREFIX_ADDRESS, 435 PREFIX_CACHEINFO, 436 __PREFIX_MAX 437}; 438 439#define PREFIX_MAX (__PREFIX_MAX - 1) 440 441struct prefix_cacheinfo 442{ 443 __u32 preferred_time; 444 __u32 valid_time; 445}; 446 447 448/***************************************************************** 449 * Traffic control messages. 450 ****/ 451 452struct tcmsg 453{ 454 unsigned char tcm_family; 455 unsigned char tcm__pad1; 456 unsigned short tcm__pad2; 457 int tcm_ifindex; 458 __u32 tcm_handle; 459 __u32 tcm_parent; 460 __u32 tcm_info; 461}; 462 463enum 464{ 465 TCA_UNSPEC, 466 TCA_KIND, 467 TCA_OPTIONS, 468 TCA_STATS, 469 TCA_XSTATS, 470 TCA_RATE, 471 TCA_FCNT, 472 TCA_STATS2, 473 __TCA_MAX 474}; 475 476#define TCA_MAX (__TCA_MAX - 1) 477 478#define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg)))) 479#define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg)) 480 481/* RTnetlink multicast groups - backwards compatibility for userspace */ 482#define RTMGRP_LINK 1 483#define RTMGRP_NOTIFY 2 484#define RTMGRP_NEIGH 4 485#define RTMGRP_TC 8 486 487#define RTMGRP_IPV4_IFADDR 0x10 488#define RTMGRP_IPV4_MROUTE 0x20 489#define RTMGRP_IPV4_ROUTE 0x40 490#define RTMGRP_IPV4_RULE 0x80 491 492#define RTMGRP_IPV6_IFADDR 0x100 493#define RTMGRP_IPV6_MROUTE 0x200 494#define RTMGRP_IPV6_ROUTE 0x400 495#define RTMGRP_IPV6_IFINFO 0x800 496 497#define RTMGRP_DECnet_IFADDR 0x1000 498#define RTMGRP_DECnet_ROUTE 0x4000 499 500#define RTMGRP_IPV6_PREFIX 0x20000 501 502/* RTnetlink multicast groups */ 503enum rtnetlink_groups { 504 RTNLGRP_NONE, 505#define RTNLGRP_NONE RTNLGRP_NONE 506 RTNLGRP_LINK, 507#define RTNLGRP_LINK RTNLGRP_LINK 508 RTNLGRP_NOTIFY, 509#define RTNLGRP_NOTIFY RTNLGRP_NOTIFY 510 RTNLGRP_NEIGH, 511#define RTNLGRP_NEIGH RTNLGRP_NEIGH 512 RTNLGRP_TC, 513#define RTNLGRP_TC RTNLGRP_TC 514 RTNLGRP_IPV4_IFADDR, 515#define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR 516 RTNLGRP_IPV4_MROUTE, 517#define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE 518 RTNLGRP_IPV4_ROUTE, 519#define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE 520 RTNLGRP_IPV4_RULE, 521#define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE 522 RTNLGRP_IPV6_IFADDR, 523#define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR 524 RTNLGRP_IPV6_MROUTE, 525#define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE 526 RTNLGRP_IPV6_ROUTE, 527#define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE 528 RTNLGRP_IPV6_IFINFO, 529#define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO 530 RTNLGRP_DECnet_IFADDR, 531#define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR 532 RTNLGRP_NOP2, 533 RTNLGRP_DECnet_ROUTE, 534#define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE 535 RTNLGRP_DECnet_RULE, 536#define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE 537 RTNLGRP_NOP4, 538 RTNLGRP_IPV6_PREFIX, 539#define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX 540 RTNLGRP_IPV6_RULE, 541#define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE 542 __RTNLGRP_MAX 543}; 544#define RTNLGRP_MAX (__RTNLGRP_MAX - 1) 545 546/* TC action piece */ 547struct tcamsg 548{ 549 unsigned char tca_family; 550 unsigned char tca__pad1; 551 unsigned short tca__pad2; 552}; 553#define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg)))) 554#define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg)) 555#define TCA_ACT_TAB 1 /* attr type must be >=1 */ 556#define TCAA_MAX 1 557 558/* End of information exported to user level */ 559 560 561 562#endif /* __LINUX_RTNETLINK_H */ 563