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_MARK, 286 __RTA_MAX 287}; 288 289#define RTA_MAX (__RTA_MAX - 1) 290 291#define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg)))) 292#define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg)) 293 294/* RTM_MULTIPATH --- array of struct rtnexthop. 295 * 296 * "struct rtnexthop" describes all necessary nexthop information, 297 * i.e. parameters of path to a destination via this nexthop. 298 * 299 * At the moment it is impossible to set different prefsrc, mtu, window 300 * and rtt for different paths from multipath. 301 */ 302 303struct rtnexthop { 304 unsigned short rtnh_len; 305 unsigned char rtnh_flags; 306 unsigned char rtnh_hops; 307 int rtnh_ifindex; 308}; 309 310/* rtnh_flags */ 311 312#define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */ 313#define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */ 314#define RTNH_F_ONLINK 4 /* Gateway is forced on link */ 315 316/* Macros to handle hexthops */ 317 318#define RTNH_ALIGNTO 4 319#define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) ) 320#define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \ 321 ((int)(rtnh)->rtnh_len) <= (len)) 322#define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len))) 323#define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len)) 324#define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len)) 325#define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0))) 326 327/* RTM_CACHEINFO */ 328 329struct rta_cacheinfo { 330 __u32 rta_clntref; 331 __u32 rta_lastuse; 332 __s32 rta_expires; 333 __u32 rta_error; 334 __u32 rta_used; 335 336#define RTNETLINK_HAVE_PEERINFO 1 337 __u32 rta_id; 338 __u32 rta_ts; 339 __u32 rta_tsage; 340}; 341 342/* RTM_METRICS --- array of struct rtattr with types of RTAX_* */ 343 344enum { 345 RTAX_UNSPEC, 346#define RTAX_UNSPEC RTAX_UNSPEC 347 RTAX_LOCK, 348#define RTAX_LOCK RTAX_LOCK 349 RTAX_MTU, 350#define RTAX_MTU RTAX_MTU 351 RTAX_WINDOW, 352#define RTAX_WINDOW RTAX_WINDOW 353 RTAX_RTT, 354#define RTAX_RTT RTAX_RTT 355 RTAX_RTTVAR, 356#define RTAX_RTTVAR RTAX_RTTVAR 357 RTAX_SSTHRESH, 358#define RTAX_SSTHRESH RTAX_SSTHRESH 359 RTAX_CWND, 360#define RTAX_CWND RTAX_CWND 361 RTAX_ADVMSS, 362#define RTAX_ADVMSS RTAX_ADVMSS 363 RTAX_REORDERING, 364#define RTAX_REORDERING RTAX_REORDERING 365 RTAX_HOPLIMIT, 366#define RTAX_HOPLIMIT RTAX_HOPLIMIT 367 RTAX_INITCWND, 368#define RTAX_INITCWND RTAX_INITCWND 369 RTAX_FEATURES, 370#define RTAX_FEATURES RTAX_FEATURES 371 RTAX_RTO_MIN, 372#define RTAX_RTO_MIN RTAX_RTO_MIN 373 RTAX_INITRWND, 374#define RTAX_INITRWND RTAX_INITRWND 375 __RTAX_MAX 376}; 377 378#define RTAX_MAX (__RTAX_MAX - 1) 379 380#define RTAX_FEATURE_ECN 0x00000001 381#define RTAX_FEATURE_SACK 0x00000002 382#define RTAX_FEATURE_TIMESTAMP 0x00000004 383#define RTAX_FEATURE_ALLFRAG 0x00000008 384 385struct rta_session { 386 __u8 proto; 387 __u8 pad1; 388 __u16 pad2; 389 390 union { 391 struct { 392 __u16 sport; 393 __u16 dport; 394 } ports; 395 396 struct { 397 __u8 type; 398 __u8 code; 399 __u16 ident; 400 } icmpt; 401 402 __u32 spi; 403 } u; 404}; 405 406/**** 407 * General form of address family dependent message. 408 ****/ 409 410struct rtgenmsg { 411 unsigned char rtgen_family; 412}; 413 414/***************************************************************** 415 * Link layer specific messages. 416 ****/ 417 418/* struct ifinfomsg 419 * passes link level specific information, not dependent 420 * on network protocol. 421 */ 422 423struct ifinfomsg { 424 unsigned char ifi_family; 425 unsigned char __ifi_pad; 426 unsigned short ifi_type; /* ARPHRD_* */ 427 int ifi_index; /* Link index */ 428 unsigned ifi_flags; /* IFF_* flags */ 429 unsigned ifi_change; /* IFF_* change mask */ 430}; 431 432/******************************************************************** 433 * prefix information 434 ****/ 435 436struct prefixmsg { 437 unsigned char prefix_family; 438 unsigned char prefix_pad1; 439 unsigned short prefix_pad2; 440 int prefix_ifindex; 441 unsigned char prefix_type; 442 unsigned char prefix_len; 443 unsigned char prefix_flags; 444 unsigned char prefix_pad3; 445}; 446 447enum 448{ 449 PREFIX_UNSPEC, 450 PREFIX_ADDRESS, 451 PREFIX_CACHEINFO, 452 __PREFIX_MAX 453}; 454 455#define PREFIX_MAX (__PREFIX_MAX - 1) 456 457struct prefix_cacheinfo { 458 __u32 preferred_time; 459 __u32 valid_time; 460}; 461 462 463/***************************************************************** 464 * Traffic control messages. 465 ****/ 466 467struct tcmsg { 468 unsigned char tcm_family; 469 unsigned char tcm__pad1; 470 unsigned short tcm__pad2; 471 int tcm_ifindex; 472 __u32 tcm_handle; 473 __u32 tcm_parent; 474 __u32 tcm_info; 475}; 476 477enum { 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 unsigned char nduseropt_family; 501 unsigned char nduseropt_pad1; 502 unsigned short nduseropt_opts_len; /* Total length of options */ 503 int nduseropt_ifindex; 504 __u8 nduseropt_icmp_type; 505 __u8 nduseropt_icmp_code; 506 unsigned short nduseropt_pad2; 507 unsigned int nduseropt_pad3; 508 /* Followed by one or more ND options */ 509}; 510 511enum { 512 NDUSEROPT_UNSPEC, 513 NDUSEROPT_SRCADDR, 514 __NDUSEROPT_MAX 515}; 516 517#define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1) 518 519#ifndef __KERNEL__ 520/* RTnetlink multicast groups - backwards compatibility for userspace */ 521#define RTMGRP_LINK 1 522#define RTMGRP_NOTIFY 2 523#define RTMGRP_NEIGH 4 524#define RTMGRP_TC 8 525 526#define RTMGRP_IPV4_IFADDR 0x10 527#define RTMGRP_IPV4_MROUTE 0x20 528#define RTMGRP_IPV4_ROUTE 0x40 529#define RTMGRP_IPV4_RULE 0x80 530 531#define RTMGRP_IPV6_IFADDR 0x100 532#define RTMGRP_IPV6_MROUTE 0x200 533#define RTMGRP_IPV6_ROUTE 0x400 534#define RTMGRP_IPV6_IFINFO 0x800 535 536#define RTMGRP_DECnet_IFADDR 0x1000 537#define RTMGRP_DECnet_ROUTE 0x4000 538 539#define RTMGRP_IPV6_PREFIX 0x20000 540#endif 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 unsigned char tca_family; 595 unsigned char tca__pad1; 596 unsigned short tca__pad2; 597}; 598#define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg)))) 599#define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg)) 600#define TCA_ACT_TAB 1 /* attr type must be >=1 */ 601#define TCAA_MAX 1 602 603/* End of information exported to user level */ 604 605#ifdef __KERNEL__ 606 607#include <linux/mutex.h> 608 609static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str) 610{ 611 int len = strlen(str) + 1; 612 return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len); 613} 614 615extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo); 616extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid); 617extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, 618 u32 group, struct nlmsghdr *nlh, gfp_t flags); 619extern void rtnl_set_sk_err(struct net *net, u32 group, int error); 620extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics); 621extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, 622 u32 id, u32 ts, u32 tsage, long expires, 623 u32 error); 624 625extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data); 626 627#define RTA_PUT(skb, attrtype, attrlen, data) \ 628({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \ 629 goto rtattr_failure; \ 630 __rta_fill(skb, attrtype, attrlen, data); }) 631 632#define RTA_APPEND(skb, attrlen, data) \ 633({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \ 634 goto rtattr_failure; \ 635 memcpy(skb_put(skb, attrlen), data, attrlen); }) 636 637#define RTA_PUT_NOHDR(skb, attrlen, data) \ 638({ RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \ 639 memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \ 640 RTA_ALIGN(attrlen) - attrlen); }) 641 642#define RTA_PUT_U8(skb, attrtype, value) \ 643({ u8 _tmp = (value); \ 644 RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); }) 645 646#define RTA_PUT_U16(skb, attrtype, value) \ 647({ u16 _tmp = (value); \ 648 RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); }) 649 650#define RTA_PUT_U32(skb, attrtype, value) \ 651({ u32 _tmp = (value); \ 652 RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); }) 653 654#define RTA_PUT_U64(skb, attrtype, value) \ 655({ u64 _tmp = (value); \ 656 RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); }) 657 658#define RTA_PUT_SECS(skb, attrtype, value) \ 659 RTA_PUT_U64(skb, attrtype, (value) / HZ) 660 661#define RTA_PUT_MSECS(skb, attrtype, value) \ 662 RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value)) 663 664#define RTA_PUT_STRING(skb, attrtype, value) \ 665 RTA_PUT(skb, attrtype, strlen(value) + 1, value) 666 667#define RTA_PUT_FLAG(skb, attrtype) \ 668 RTA_PUT(skb, attrtype, 0, NULL); 669 670#define RTA_NEST(skb, type) \ 671({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \ 672 RTA_PUT(skb, type, 0, NULL); \ 673 __start; }) 674 675#define RTA_NEST_END(skb, start) \ 676({ (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ 677 (skb)->len; }) 678 679#define RTA_NEST_COMPAT(skb, type, attrlen, data) \ 680({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \ 681 RTA_PUT(skb, type, attrlen, data); \ 682 RTA_NEST(skb, type); \ 683 __start; }) 684 685#define RTA_NEST_COMPAT_END(skb, start) \ 686({ struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \ 687 (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ 688 RTA_NEST_END(skb, __nest); \ 689 (skb)->len; }) 690 691#define RTA_NEST_CANCEL(skb, start) \ 692({ if (start) \ 693 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \ 694 -1; }) 695 696#define RTA_GET_U8(rta) \ 697({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \ 698 goto rtattr_failure; \ 699 *(u8 *) RTA_DATA(rta); }) 700 701#define RTA_GET_U16(rta) \ 702({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \ 703 goto rtattr_failure; \ 704 *(u16 *) RTA_DATA(rta); }) 705 706#define RTA_GET_U32(rta) \ 707({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \ 708 goto rtattr_failure; \ 709 *(u32 *) RTA_DATA(rta); }) 710 711#define RTA_GET_U64(rta) \ 712({ u64 _tmp; \ 713 if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \ 714 goto rtattr_failure; \ 715 memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \ 716 _tmp; }) 717 718#define RTA_GET_FLAG(rta) (!!(rta)) 719 720#define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ) 721#define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta))) 722 723static inline struct rtattr * 724__rta_reserve(struct sk_buff *skb, int attrtype, int attrlen) 725{ 726 struct rtattr *rta; 727 int size = RTA_LENGTH(attrlen); 728 729 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size)); 730 rta->rta_type = attrtype; 731 rta->rta_len = size; 732 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size); 733 return rta; 734} 735 736#define __RTA_PUT(skb, attrtype, attrlen) \ 737({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \ 738 goto rtattr_failure; \ 739 __rta_reserve(skb, attrtype, attrlen); }) 740 741extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change); 742 743/* RTNL is used as a global lock for all changes to network configuration */ 744extern void rtnl_lock(void); 745extern void rtnl_unlock(void); 746extern int rtnl_trylock(void); 747extern int rtnl_is_locked(void); 748#ifdef CONFIG_PROVE_LOCKING 749extern int lockdep_rtnl_is_held(void); 750#endif /* #ifdef CONFIG_PROVE_LOCKING */ 751 752extern void rtnetlink_init(void); 753extern void __rtnl_unlock(void); 754 755#define ASSERT_RTNL() do { \ 756 if (unlikely(!rtnl_is_locked())) { \ 757 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \ 758 __FILE__, __LINE__); \ 759 dump_stack(); \ 760 } \ 761} while(0) 762 763static inline u32 rtm_get_table(struct rtattr **rta, u8 table) 764{ 765 return RTA_GET_U32(rta[RTA_TABLE-1]); 766rtattr_failure: 767 return table; 768} 769 770#endif /* __KERNEL__ */ 771 772 773#endif /* __LINUX_RTNETLINK_H */ 774