rtnetlink.h revision a6ffa8b00d60c1fff5d197575c2e5a896e2e15b0
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, /* no longer used */ 265 RTA_TABLE, 266 __RTA_MAX 267}; 268 269#define RTA_MAX (__RTA_MAX - 1) 270 271#define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg)))) 272#define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg)) 273 274/* RTM_MULTIPATH --- array of struct rtnexthop. 275 * 276 * "struct rtnexthop" describes all necessary nexthop information, 277 * i.e. parameters of path to a destination via this nexthop. 278 * 279 * At the moment it is impossible to set different prefsrc, mtu, window 280 * and rtt for different paths from multipath. 281 */ 282 283struct rtnexthop 284{ 285 unsigned short rtnh_len; 286 unsigned char rtnh_flags; 287 unsigned char rtnh_hops; 288 int rtnh_ifindex; 289}; 290 291/* rtnh_flags */ 292 293#define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */ 294#define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */ 295#define RTNH_F_ONLINK 4 /* Gateway is forced on link */ 296 297/* Macros to handle hexthops */ 298 299#define RTNH_ALIGNTO 4 300#define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) ) 301#define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \ 302 ((int)(rtnh)->rtnh_len) <= (len)) 303#define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len))) 304#define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len)) 305#define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len)) 306#define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0))) 307 308/* RTM_CACHEINFO */ 309 310struct rta_cacheinfo 311{ 312 __u32 rta_clntref; 313 __u32 rta_lastuse; 314 __s32 rta_expires; 315 __u32 rta_error; 316 __u32 rta_used; 317 318#define RTNETLINK_HAVE_PEERINFO 1 319 __u32 rta_id; 320 __u32 rta_ts; 321 __u32 rta_tsage; 322}; 323 324/* RTM_METRICS --- array of struct rtattr with types of RTAX_* */ 325 326enum 327{ 328 RTAX_UNSPEC, 329#define RTAX_UNSPEC RTAX_UNSPEC 330 RTAX_LOCK, 331#define RTAX_LOCK RTAX_LOCK 332 RTAX_MTU, 333#define RTAX_MTU RTAX_MTU 334 RTAX_WINDOW, 335#define RTAX_WINDOW RTAX_WINDOW 336 RTAX_RTT, 337#define RTAX_RTT RTAX_RTT 338 RTAX_RTTVAR, 339#define RTAX_RTTVAR RTAX_RTTVAR 340 RTAX_SSTHRESH, 341#define RTAX_SSTHRESH RTAX_SSTHRESH 342 RTAX_CWND, 343#define RTAX_CWND RTAX_CWND 344 RTAX_ADVMSS, 345#define RTAX_ADVMSS RTAX_ADVMSS 346 RTAX_REORDERING, 347#define RTAX_REORDERING RTAX_REORDERING 348 RTAX_HOPLIMIT, 349#define RTAX_HOPLIMIT RTAX_HOPLIMIT 350 RTAX_INITCWND, 351#define RTAX_INITCWND RTAX_INITCWND 352 RTAX_FEATURES, 353#define RTAX_FEATURES RTAX_FEATURES 354 __RTAX_MAX 355}; 356 357#define RTAX_MAX (__RTAX_MAX - 1) 358 359#define RTAX_FEATURE_ECN 0x00000001 360#define RTAX_FEATURE_SACK 0x00000002 361#define RTAX_FEATURE_TIMESTAMP 0x00000004 362#define RTAX_FEATURE_ALLFRAG 0x00000008 363 364struct rta_session 365{ 366 __u8 proto; 367 __u8 pad1; 368 __u16 pad2; 369 370 union { 371 struct { 372 __u16 sport; 373 __u16 dport; 374 } ports; 375 376 struct { 377 __u8 type; 378 __u8 code; 379 __u16 ident; 380 } icmpt; 381 382 __u32 spi; 383 } u; 384}; 385 386/**** 387 * General form of address family dependent message. 388 ****/ 389 390struct rtgenmsg 391{ 392 unsigned char rtgen_family; 393}; 394 395/***************************************************************** 396 * Link layer specific messages. 397 ****/ 398 399/* struct ifinfomsg 400 * passes link level specific information, not dependent 401 * on network protocol. 402 */ 403 404struct ifinfomsg 405{ 406 unsigned char ifi_family; 407 unsigned char __ifi_pad; 408 unsigned short ifi_type; /* ARPHRD_* */ 409 int ifi_index; /* Link index */ 410 unsigned ifi_flags; /* IFF_* flags */ 411 unsigned ifi_change; /* IFF_* change mask */ 412}; 413 414/******************************************************************** 415 * prefix information 416 ****/ 417 418struct prefixmsg 419{ 420 unsigned char prefix_family; 421 unsigned char prefix_pad1; 422 unsigned short prefix_pad2; 423 int prefix_ifindex; 424 unsigned char prefix_type; 425 unsigned char prefix_len; 426 unsigned char prefix_flags; 427 unsigned char prefix_pad3; 428}; 429 430enum 431{ 432 PREFIX_UNSPEC, 433 PREFIX_ADDRESS, 434 PREFIX_CACHEINFO, 435 __PREFIX_MAX 436}; 437 438#define PREFIX_MAX (__PREFIX_MAX - 1) 439 440struct prefix_cacheinfo 441{ 442 __u32 preferred_time; 443 __u32 valid_time; 444}; 445 446 447/***************************************************************** 448 * Traffic control messages. 449 ****/ 450 451struct tcmsg 452{ 453 unsigned char tcm_family; 454 unsigned char tcm__pad1; 455 unsigned short tcm__pad2; 456 int tcm_ifindex; 457 __u32 tcm_handle; 458 __u32 tcm_parent; 459 __u32 tcm_info; 460}; 461 462enum 463{ 464 TCA_UNSPEC, 465 TCA_KIND, 466 TCA_OPTIONS, 467 TCA_STATS, 468 TCA_XSTATS, 469 TCA_RATE, 470 TCA_FCNT, 471 TCA_STATS2, 472 __TCA_MAX 473}; 474 475#define TCA_MAX (__TCA_MAX - 1) 476 477#define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg)))) 478#define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg)) 479 480/* RTnetlink multicast groups - backwards compatibility for userspace */ 481#define RTMGRP_LINK 1 482#define RTMGRP_NOTIFY 2 483#define RTMGRP_NEIGH 4 484#define RTMGRP_TC 8 485 486#define RTMGRP_IPV4_IFADDR 0x10 487#define RTMGRP_IPV4_MROUTE 0x20 488#define RTMGRP_IPV4_ROUTE 0x40 489#define RTMGRP_IPV4_RULE 0x80 490 491#define RTMGRP_IPV6_IFADDR 0x100 492#define RTMGRP_IPV6_MROUTE 0x200 493#define RTMGRP_IPV6_ROUTE 0x400 494#define RTMGRP_IPV6_IFINFO 0x800 495 496#define RTMGRP_DECnet_IFADDR 0x1000 497#define RTMGRP_DECnet_ROUTE 0x4000 498 499#define RTMGRP_IPV6_PREFIX 0x20000 500 501/* RTnetlink multicast groups */ 502enum rtnetlink_groups { 503 RTNLGRP_NONE, 504#define RTNLGRP_NONE RTNLGRP_NONE 505 RTNLGRP_LINK, 506#define RTNLGRP_LINK RTNLGRP_LINK 507 RTNLGRP_NOTIFY, 508#define RTNLGRP_NOTIFY RTNLGRP_NOTIFY 509 RTNLGRP_NEIGH, 510#define RTNLGRP_NEIGH RTNLGRP_NEIGH 511 RTNLGRP_TC, 512#define RTNLGRP_TC RTNLGRP_TC 513 RTNLGRP_IPV4_IFADDR, 514#define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR 515 RTNLGRP_IPV4_MROUTE, 516#define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE 517 RTNLGRP_IPV4_ROUTE, 518#define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE 519 RTNLGRP_IPV4_RULE, 520#define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE 521 RTNLGRP_IPV6_IFADDR, 522#define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR 523 RTNLGRP_IPV6_MROUTE, 524#define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE 525 RTNLGRP_IPV6_ROUTE, 526#define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE 527 RTNLGRP_IPV6_IFINFO, 528#define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO 529 RTNLGRP_DECnet_IFADDR, 530#define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR 531 RTNLGRP_NOP2, 532 RTNLGRP_DECnet_ROUTE, 533#define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE 534 RTNLGRP_DECnet_RULE, 535#define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE 536 RTNLGRP_NOP4, 537 RTNLGRP_IPV6_PREFIX, 538#define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX 539 RTNLGRP_IPV6_RULE, 540#define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE 541 __RTNLGRP_MAX 542}; 543#define RTNLGRP_MAX (__RTNLGRP_MAX - 1) 544 545/* TC action piece */ 546struct tcamsg 547{ 548 unsigned char tca_family; 549 unsigned char tca__pad1; 550 unsigned short tca__pad2; 551}; 552#define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg)))) 553#define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg)) 554#define TCA_ACT_TAB 1 /* attr type must be >=1 */ 555#define TCAA_MAX 1 556 557/* End of information exported to user level */ 558 559 560 561#endif /* __LINUX_RTNETLINK_H */ 562