rtnetlink.h revision 1e659af3c0c6d1aad6007c5b4c5405b1fee483d7
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#define RTPROT_DHCP 16 /* DHCP client */ 215 216/* rtm_scope 217 218 Really it is not scope, but sort of distance to the destination. 219 NOWHERE are reserved for not existing destinations, HOST is our 220 local addresses, LINK are destinations, located on directly attached 221 link and UNIVERSE is everywhere in the Universe. 222 223 Intermediate values are also possible f.e. interior routes 224 could be assigned a value between UNIVERSE and LINK. 225*/ 226 227enum rt_scope_t 228{ 229 RT_SCOPE_UNIVERSE=0, 230/* User defined values */ 231 RT_SCOPE_SITE=200, 232 RT_SCOPE_LINK=253, 233 RT_SCOPE_HOST=254, 234 RT_SCOPE_NOWHERE=255 235}; 236 237/* rtm_flags */ 238 239#define RTM_F_NOTIFY 0x100 /* Notify user of route change */ 240#define RTM_F_CLONED 0x200 /* This route is cloned */ 241#define RTM_F_EQUALIZE 0x400 /* Multipath equalizer: NI */ 242#define RTM_F_PREFIX 0x800 /* Prefix addresses */ 243 244/* Reserved table identifiers */ 245 246enum rt_class_t 247{ 248 RT_TABLE_UNSPEC=0, 249/* User defined values */ 250 RT_TABLE_COMPAT=252, 251 RT_TABLE_DEFAULT=253, 252 RT_TABLE_MAIN=254, 253 RT_TABLE_LOCAL=255, 254 RT_TABLE_MAX=0xFFFFFFFF 255}; 256 257 258/* Routing message attributes */ 259 260enum rtattr_type_t 261{ 262 RTA_UNSPEC, 263 RTA_DST, 264 RTA_SRC, 265 RTA_IIF, 266 RTA_OIF, 267 RTA_GATEWAY, 268 RTA_PRIORITY, 269 RTA_PREFSRC, 270 RTA_METRICS, 271 RTA_MULTIPATH, 272 RTA_PROTOINFO, /* no longer used */ 273 RTA_FLOW, 274 RTA_CACHEINFO, 275 RTA_SESSION, /* no longer used */ 276 RTA_MP_ALGO, /* no longer used */ 277 RTA_TABLE, 278 __RTA_MAX 279}; 280 281#define RTA_MAX (__RTA_MAX - 1) 282 283#define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg)))) 284#define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg)) 285 286/* RTM_MULTIPATH --- array of struct rtnexthop. 287 * 288 * "struct rtnexthop" describes all necessary nexthop information, 289 * i.e. parameters of path to a destination via this nexthop. 290 * 291 * At the moment it is impossible to set different prefsrc, mtu, window 292 * and rtt for different paths from multipath. 293 */ 294 295struct rtnexthop 296{ 297 unsigned short rtnh_len; 298 unsigned char rtnh_flags; 299 unsigned char rtnh_hops; 300 int rtnh_ifindex; 301}; 302 303/* rtnh_flags */ 304 305#define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */ 306#define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */ 307#define RTNH_F_ONLINK 4 /* Gateway is forced on link */ 308 309/* Macros to handle hexthops */ 310 311#define RTNH_ALIGNTO 4 312#define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) ) 313#define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \ 314 ((int)(rtnh)->rtnh_len) <= (len)) 315#define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len))) 316#define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len)) 317#define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len)) 318#define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0))) 319 320/* RTM_CACHEINFO */ 321 322struct rta_cacheinfo 323{ 324 __u32 rta_clntref; 325 __u32 rta_lastuse; 326 __s32 rta_expires; 327 __u32 rta_error; 328 __u32 rta_used; 329 330#define RTNETLINK_HAVE_PEERINFO 1 331 __u32 rta_id; 332 __u32 rta_ts; 333 __u32 rta_tsage; 334}; 335 336/* RTM_METRICS --- array of struct rtattr with types of RTAX_* */ 337 338enum 339{ 340 RTAX_UNSPEC, 341#define RTAX_UNSPEC RTAX_UNSPEC 342 RTAX_LOCK, 343#define RTAX_LOCK RTAX_LOCK 344 RTAX_MTU, 345#define RTAX_MTU RTAX_MTU 346 RTAX_WINDOW, 347#define RTAX_WINDOW RTAX_WINDOW 348 RTAX_RTT, 349#define RTAX_RTT RTAX_RTT 350 RTAX_RTTVAR, 351#define RTAX_RTTVAR RTAX_RTTVAR 352 RTAX_SSTHRESH, 353#define RTAX_SSTHRESH RTAX_SSTHRESH 354 RTAX_CWND, 355#define RTAX_CWND RTAX_CWND 356 RTAX_ADVMSS, 357#define RTAX_ADVMSS RTAX_ADVMSS 358 RTAX_REORDERING, 359#define RTAX_REORDERING RTAX_REORDERING 360 RTAX_HOPLIMIT, 361#define RTAX_HOPLIMIT RTAX_HOPLIMIT 362 RTAX_INITCWND, 363#define RTAX_INITCWND RTAX_INITCWND 364 RTAX_FEATURES, 365#define RTAX_FEATURES RTAX_FEATURES 366 RTAX_RTO_MIN, 367#define RTAX_RTO_MIN RTAX_RTO_MIN 368 __RTAX_MAX 369}; 370 371#define RTAX_MAX (__RTAX_MAX - 1) 372 373#define RTAX_FEATURE_ECN 0x00000001 374#define RTAX_FEATURE_SACK 0x00000002 375#define RTAX_FEATURE_TIMESTAMP 0x00000004 376#define RTAX_FEATURE_ALLFRAG 0x00000008 377 378struct rta_session 379{ 380 __u8 proto; 381 __u8 pad1; 382 __u16 pad2; 383 384 union { 385 struct { 386 __u16 sport; 387 __u16 dport; 388 } ports; 389 390 struct { 391 __u8 type; 392 __u8 code; 393 __u16 ident; 394 } icmpt; 395 396 __u32 spi; 397 } u; 398}; 399 400/**** 401 * General form of address family dependent message. 402 ****/ 403 404struct rtgenmsg 405{ 406 unsigned char rtgen_family; 407}; 408 409/***************************************************************** 410 * Link layer specific messages. 411 ****/ 412 413/* struct ifinfomsg 414 * passes link level specific information, not dependent 415 * on network protocol. 416 */ 417 418struct ifinfomsg 419{ 420 unsigned char ifi_family; 421 unsigned char __ifi_pad; 422 unsigned short ifi_type; /* ARPHRD_* */ 423 int ifi_index; /* Link index */ 424 unsigned ifi_flags; /* IFF_* flags */ 425 unsigned ifi_change; /* IFF_* change mask */ 426}; 427 428/******************************************************************** 429 * prefix information 430 ****/ 431 432struct prefixmsg 433{ 434 unsigned char prefix_family; 435 unsigned char prefix_pad1; 436 unsigned short prefix_pad2; 437 int prefix_ifindex; 438 unsigned char prefix_type; 439 unsigned char prefix_len; 440 unsigned char prefix_flags; 441 unsigned char prefix_pad3; 442}; 443 444enum 445{ 446 PREFIX_UNSPEC, 447 PREFIX_ADDRESS, 448 PREFIX_CACHEINFO, 449 __PREFIX_MAX 450}; 451 452#define PREFIX_MAX (__PREFIX_MAX - 1) 453 454struct prefix_cacheinfo 455{ 456 __u32 preferred_time; 457 __u32 valid_time; 458}; 459 460 461/***************************************************************** 462 * Traffic control messages. 463 ****/ 464 465struct tcmsg 466{ 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{ 478 TCA_UNSPEC, 479 TCA_KIND, 480 TCA_OPTIONS, 481 TCA_STATS, 482 TCA_XSTATS, 483 TCA_RATE, 484 TCA_FCNT, 485 TCA_STATS2, 486 TCA_STAB, 487 __TCA_MAX 488}; 489 490#define TCA_MAX (__TCA_MAX - 1) 491 492#define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg)))) 493#define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg)) 494 495/******************************************************************** 496 * Neighbor Discovery userland options 497 ****/ 498 499struct nduseroptmsg 500{ 501 unsigned char nduseropt_family; 502 unsigned char nduseropt_pad1; 503 unsigned short nduseropt_opts_len; /* Total length of options */ 504 int nduseropt_ifindex; 505 __u8 nduseropt_icmp_type; 506 __u8 nduseropt_icmp_code; 507 unsigned short nduseropt_pad2; 508 unsigned int nduseropt_pad3; 509 /* Followed by one or more ND options */ 510}; 511 512enum 513{ 514 NDUSEROPT_UNSPEC, 515 NDUSEROPT_SRCADDR, 516 __NDUSEROPT_MAX 517}; 518 519#define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1) 520 521/* RTnetlink multicast groups - backwards compatibility for userspace */ 522#define RTMGRP_LINK 1 523#define RTMGRP_NOTIFY 2 524#define RTMGRP_NEIGH 4 525#define RTMGRP_TC 8 526 527#define RTMGRP_IPV4_IFADDR 0x10 528#define RTMGRP_IPV4_MROUTE 0x20 529#define RTMGRP_IPV4_ROUTE 0x40 530#define RTMGRP_IPV4_RULE 0x80 531 532#define RTMGRP_IPV6_IFADDR 0x100 533#define RTMGRP_IPV6_MROUTE 0x200 534#define RTMGRP_IPV6_ROUTE 0x400 535#define RTMGRP_IPV6_IFINFO 0x800 536 537#define RTMGRP_DECnet_IFADDR 0x1000 538#define RTMGRP_DECnet_ROUTE 0x4000 539 540#define RTMGRP_IPV6_PREFIX 0x20000 541 542/* RTnetlink multicast groups */ 543enum rtnetlink_groups { 544 RTNLGRP_NONE, 545#define RTNLGRP_NONE RTNLGRP_NONE 546 RTNLGRP_LINK, 547#define RTNLGRP_LINK RTNLGRP_LINK 548 RTNLGRP_NOTIFY, 549#define RTNLGRP_NOTIFY RTNLGRP_NOTIFY 550 RTNLGRP_NEIGH, 551#define RTNLGRP_NEIGH RTNLGRP_NEIGH 552 RTNLGRP_TC, 553#define RTNLGRP_TC RTNLGRP_TC 554 RTNLGRP_IPV4_IFADDR, 555#define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR 556 RTNLGRP_IPV4_MROUTE, 557#define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE 558 RTNLGRP_IPV4_ROUTE, 559#define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE 560 RTNLGRP_IPV4_RULE, 561#define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE 562 RTNLGRP_IPV6_IFADDR, 563#define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR 564 RTNLGRP_IPV6_MROUTE, 565#define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE 566 RTNLGRP_IPV6_ROUTE, 567#define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE 568 RTNLGRP_IPV6_IFINFO, 569#define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO 570 RTNLGRP_DECnet_IFADDR, 571#define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR 572 RTNLGRP_NOP2, 573 RTNLGRP_DECnet_ROUTE, 574#define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE 575 RTNLGRP_DECnet_RULE, 576#define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE 577 RTNLGRP_NOP4, 578 RTNLGRP_IPV6_PREFIX, 579#define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX 580 RTNLGRP_IPV6_RULE, 581#define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE 582 RTNLGRP_ND_USEROPT, 583#define RTNLGRP_ND_USEROPT RTNLGRP_ND_USEROPT 584 RTNLGRP_PHONET_IFADDR, 585#define RTNLGRP_PHONET_IFADDR RTNLGRP_PHONET_IFADDR 586 RTNLGRP_PHONET_ROUTE, 587#define RTNLGRP_PHONET_ROUTE RTNLGRP_PHONET_ROUTE 588 __RTNLGRP_MAX 589}; 590#define RTNLGRP_MAX (__RTNLGRP_MAX - 1) 591 592/* TC action piece */ 593struct tcamsg 594{ 595 unsigned char tca_family; 596 unsigned char tca__pad1; 597 unsigned short tca__pad2; 598}; 599#define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg)))) 600#define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg)) 601#define TCA_ACT_TAB 1 /* attr type must be >=1 */ 602#define TCAA_MAX 1 603 604/* End of information exported to user level */ 605 606 607 608#endif /* __LINUX_RTNETLINK_H */ 609