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 15 enum { 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_MAX, 104 #define RTM_MAX (((__RTM_MAX + 3) & ~3) - 1) 105 }; 106 107 #define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE) 108 #define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2) 109 #define RTM_FAM(cmd) (((cmd) - RTM_BASE) >> 2) 110 111 /* 112 Generic structure for encapsulation of optional route information. 113 It is reminiscent of sockaddr, but with sa_family replaced 114 with attribute type. 115 */ 116 117 struct rtattr 118 { 119 unsigned short rta_len; 120 unsigned short rta_type; 121 }; 122 123 /* Macros to handle rtattributes */ 124 125 #define RTA_ALIGNTO 4 126 #define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) ) 127 #define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \ 128 (rta)->rta_len >= sizeof(struct rtattr) && \ 129 (rta)->rta_len <= (len)) 130 #define RTA_NEXT(rta,attrlen) ((attrlen) -= RTA_ALIGN((rta)->rta_len), \ 131 (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len))) 132 #define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len)) 133 #define RTA_SPACE(len) RTA_ALIGN(RTA_LENGTH(len)) 134 #define RTA_DATA(rta) ((void*)(((char*)(rta)) + RTA_LENGTH(0))) 135 #define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0)) 136 137 138 139 140 /****************************************************************************** 141 * Definitions used in routing table administration. 142 ****/ 143 144 struct rtmsg 145 { 146 unsigned char rtm_family; 147 unsigned char rtm_dst_len; 148 unsigned char rtm_src_len; 149 unsigned char rtm_tos; 150 151 unsigned char rtm_table; /* Routing table id */ 152 unsigned char rtm_protocol; /* Routing protocol; see below */ 153 unsigned char rtm_scope; /* See below */ 154 unsigned char rtm_type; /* See below */ 155 156 unsigned rtm_flags; 157 }; 158 159 /* rtm_type */ 160 161 enum 162 { 163 RTN_UNSPEC, 164 RTN_UNICAST, /* Gateway or direct route */ 165 RTN_LOCAL, /* Accept locally */ 166 RTN_BROADCAST, /* Accept locally as broadcast, 167 send as broadcast */ 168 RTN_ANYCAST, /* Accept locally as broadcast, 169 but send as unicast */ 170 RTN_MULTICAST, /* Multicast route */ 171 RTN_BLACKHOLE, /* Drop */ 172 RTN_UNREACHABLE, /* Destination is unreachable */ 173 RTN_PROHIBIT, /* Administratively prohibited */ 174 RTN_THROW, /* Not in this table */ 175 RTN_NAT, /* Translate this address */ 176 RTN_XRESOLVE, /* Use external resolver */ 177 __RTN_MAX 178 }; 179 180 #define RTN_MAX (__RTN_MAX - 1) 181 182 183 /* rtm_protocol */ 184 185 #define RTPROT_UNSPEC 0 186 #define RTPROT_REDIRECT 1 /* Route installed by ICMP redirects; 187 not used by current IPv4 */ 188 #define RTPROT_KERNEL 2 /* Route installed by kernel */ 189 #define RTPROT_BOOT 3 /* Route installed during boot */ 190 #define RTPROT_STATIC 4 /* Route installed by administrator */ 191 192 /* Values of protocol >= RTPROT_STATIC are not interpreted by kernel; 193 they are just passed from user and back as is. 194 It will be used by hypothetical multiple routing daemons. 195 Note that protocol values should be standardized in order to 196 avoid conflicts. 197 */ 198 199 #define RTPROT_GATED 8 /* Apparently, GateD */ 200 #define RTPROT_RA 9 /* RDISC/ND router advertisements */ 201 #define RTPROT_MRT 10 /* Merit MRT */ 202 #define RTPROT_ZEBRA 11 /* Zebra */ 203 #define RTPROT_BIRD 12 /* BIRD */ 204 #define RTPROT_DNROUTED 13 /* DECnet routing daemon */ 205 #define RTPROT_XORP 14 /* XORP */ 206 #define RTPROT_NTK 15 /* Netsukuku */ 207 208 /* rtm_scope 209 210 Really it is not scope, but sort of distance to the destination. 211 NOWHERE are reserved for not existing destinations, HOST is our 212 local addresses, LINK are destinations, located on directly attached 213 link and UNIVERSE is everywhere in the Universe. 214 215 Intermediate values are also possible f.e. interior routes 216 could be assigned a value between UNIVERSE and LINK. 217 */ 218 219 enum rt_scope_t 220 { 221 RT_SCOPE_UNIVERSE=0, 222 /* User defined values */ 223 RT_SCOPE_SITE=200, 224 RT_SCOPE_LINK=253, 225 RT_SCOPE_HOST=254, 226 RT_SCOPE_NOWHERE=255 227 }; 228 229 /* rtm_flags */ 230 231 #define RTM_F_NOTIFY 0x100 /* Notify user of route change */ 232 #define RTM_F_CLONED 0x200 /* This route is cloned */ 233 #define RTM_F_EQUALIZE 0x400 /* Multipath equalizer: NI */ 234 #define RTM_F_PREFIX 0x800 /* Prefix addresses */ 235 236 /* Reserved table identifiers */ 237 238 enum rt_class_t 239 { 240 RT_TABLE_UNSPEC=0, 241 /* User defined values */ 242 RT_TABLE_DEFAULT=253, 243 RT_TABLE_MAIN=254, 244 RT_TABLE_LOCAL=255, 245 RT_TABLE_MAX=0xFFFFFFFF 246 }; 247 248 249 /* Routing message attributes */ 250 251 enum rtattr_type_t 252 { 253 RTA_UNSPEC, 254 RTA_DST, 255 RTA_SRC, 256 RTA_IIF, 257 RTA_OIF, 258 RTA_GATEWAY, 259 RTA_PRIORITY, 260 RTA_PREFSRC, 261 RTA_METRICS, 262 RTA_MULTIPATH, 263 RTA_PROTOINFO, 264 RTA_FLOW, 265 RTA_CACHEINFO, 266 RTA_SESSION, 267 RTA_MP_ALGO, /* no longer used */ 268 RTA_TABLE, 269 __RTA_MAX 270 }; 271 272 #define RTA_MAX (__RTA_MAX - 1) 273 274 #define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg)))) 275 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg)) 276 277 /* RTM_MULTIPATH --- array of struct rtnexthop. 278 * 279 * "struct rtnexthop" describes all necessary nexthop information, 280 * i.e. parameters of path to a destination via this nexthop. 281 * 282 * At the moment it is impossible to set different prefsrc, mtu, window 283 * and rtt for different paths from multipath. 284 */ 285 286 struct rtnexthop 287 { 288 unsigned short rtnh_len; 289 unsigned char rtnh_flags; 290 unsigned char rtnh_hops; 291 int rtnh_ifindex; 292 }; 293 294 /* rtnh_flags */ 295 296 #define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */ 297 #define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */ 298 #define RTNH_F_ONLINK 4 /* Gateway is forced on link */ 299 300 /* Macros to handle hexthops */ 301 302 #define RTNH_ALIGNTO 4 303 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) ) 304 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \ 305 ((int)(rtnh)->rtnh_len) <= (len)) 306 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len))) 307 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len)) 308 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len)) 309 #define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0))) 310 311 /* RTM_CACHEINFO */ 312 313 struct rta_cacheinfo 314 { 315 __u32 rta_clntref; 316 __u32 rta_lastuse; 317 __s32 rta_expires; 318 __u32 rta_error; 319 __u32 rta_used; 320 321 #define RTNETLINK_HAVE_PEERINFO 1 322 __u32 rta_id; 323 __u32 rta_ts; 324 __u32 rta_tsage; 325 }; 326 327 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */ 328 329 enum 330 { 331 RTAX_UNSPEC, 332 #define RTAX_UNSPEC RTAX_UNSPEC 333 RTAX_LOCK, 334 #define RTAX_LOCK RTAX_LOCK 335 RTAX_MTU, 336 #define RTAX_MTU RTAX_MTU 337 RTAX_WINDOW, 338 #define RTAX_WINDOW RTAX_WINDOW 339 RTAX_RTT, 340 #define RTAX_RTT RTAX_RTT 341 RTAX_RTTVAR, 342 #define RTAX_RTTVAR RTAX_RTTVAR 343 RTAX_SSTHRESH, 344 #define RTAX_SSTHRESH RTAX_SSTHRESH 345 RTAX_CWND, 346 #define RTAX_CWND RTAX_CWND 347 RTAX_ADVMSS, 348 #define RTAX_ADVMSS RTAX_ADVMSS 349 RTAX_REORDERING, 350 #define RTAX_REORDERING RTAX_REORDERING 351 RTAX_HOPLIMIT, 352 #define RTAX_HOPLIMIT RTAX_HOPLIMIT 353 RTAX_INITCWND, 354 #define RTAX_INITCWND RTAX_INITCWND 355 RTAX_FEATURES, 356 #define RTAX_FEATURES RTAX_FEATURES 357 RTAX_RTO_MIN, 358 #define RTAX_RTO_MIN RTAX_RTO_MIN 359 __RTAX_MAX 360 }; 361 362 #define RTAX_MAX (__RTAX_MAX - 1) 363 364 #define RTAX_FEATURE_ECN 0x00000001 365 #define RTAX_FEATURE_SACK 0x00000002 366 #define RTAX_FEATURE_TIMESTAMP 0x00000004 367 #define RTAX_FEATURE_ALLFRAG 0x00000008 368 369 struct rta_session 370 { 371 __u8 proto; 372 __u8 pad1; 373 __u16 pad2; 374 375 union { 376 struct { 377 __u16 sport; 378 __u16 dport; 379 } ports; 380 381 struct { 382 __u8 type; 383 __u8 code; 384 __u16 ident; 385 } icmpt; 386 387 __u32 spi; 388 } u; 389 }; 390 391 /**** 392 * General form of address family dependent message. 393 ****/ 394 395 struct rtgenmsg 396 { 397 unsigned char rtgen_family; 398 }; 399 400 /***************************************************************** 401 * Link layer specific messages. 402 ****/ 403 404 /* struct ifinfomsg 405 * passes link level specific information, not dependent 406 * on network protocol. 407 */ 408 409 struct ifinfomsg 410 { 411 unsigned char ifi_family; 412 unsigned char __ifi_pad; 413 unsigned short ifi_type; /* ARPHRD_* */ 414 int ifi_index; /* Link index */ 415 unsigned ifi_flags; /* IFF_* flags */ 416 unsigned ifi_change; /* IFF_* change mask */ 417 }; 418 419 /******************************************************************** 420 * prefix information 421 ****/ 422 423 struct prefixmsg 424 { 425 unsigned char prefix_family; 426 unsigned char prefix_pad1; 427 unsigned short prefix_pad2; 428 int prefix_ifindex; 429 unsigned char prefix_type; 430 unsigned char prefix_len; 431 unsigned char prefix_flags; 432 unsigned char prefix_pad3; 433 }; 434 435 enum 436 { 437 PREFIX_UNSPEC, 438 PREFIX_ADDRESS, 439 PREFIX_CACHEINFO, 440 __PREFIX_MAX 441 }; 442 443 #define PREFIX_MAX (__PREFIX_MAX - 1) 444 445 struct prefix_cacheinfo 446 { 447 __u32 preferred_time; 448 __u32 valid_time; 449 }; 450 451 452 /***************************************************************** 453 * Traffic control messages. 454 ****/ 455 456 struct tcmsg 457 { 458 unsigned char tcm_family; 459 unsigned char tcm__pad1; 460 unsigned short tcm__pad2; 461 int tcm_ifindex; 462 __u32 tcm_handle; 463 __u32 tcm_parent; 464 __u32 tcm_info; 465 }; 466 467 enum 468 { 469 TCA_UNSPEC, 470 TCA_KIND, 471 TCA_OPTIONS, 472 TCA_STATS, 473 TCA_XSTATS, 474 TCA_RATE, 475 TCA_FCNT, 476 TCA_STATS2, 477 __TCA_MAX 478 }; 479 480 #define TCA_MAX (__TCA_MAX - 1) 481 482 #define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg)))) 483 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg)) 484 485 /******************************************************************** 486 * Neighbor Discovery userland options 487 ****/ 488 489 struct nduseroptmsg 490 { 491 unsigned char nduseropt_family; 492 unsigned char nduseropt_pad1; 493 unsigned short nduseropt_opts_len; /* Total length of options */ 494 int nduseropt_ifindex; 495 __u8 nduseropt_icmp_type; 496 __u8 nduseropt_icmp_code; 497 unsigned short nduseropt_pad2; 498 unsigned int nduseropt_pad3; 499 /* Followed by one or more ND options */ 500 }; 501 502 enum 503 { 504 NDUSEROPT_UNSPEC, 505 NDUSEROPT_SRCADDR, 506 __NDUSEROPT_MAX 507 }; 508 509 #define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1) 510 511 #ifndef __KERNEL__ 512 /* RTnetlink multicast groups - backwards compatibility for userspace */ 513 #define RTMGRP_LINK 1 514 #define RTMGRP_NOTIFY 2 515 #define RTMGRP_NEIGH 4 516 #define RTMGRP_TC 8 517 518 #define RTMGRP_IPV4_IFADDR 0x10 519 #define RTMGRP_IPV4_MROUTE 0x20 520 #define RTMGRP_IPV4_ROUTE 0x40 521 #define RTMGRP_IPV4_RULE 0x80 522 523 #define RTMGRP_IPV6_IFADDR 0x100 524 #define RTMGRP_IPV6_MROUTE 0x200 525 #define RTMGRP_IPV6_ROUTE 0x400 526 #define RTMGRP_IPV6_IFINFO 0x800 527 528 #define RTMGRP_DECnet_IFADDR 0x1000 529 #define RTMGRP_DECnet_ROUTE 0x4000 530 531 #define RTMGRP_IPV6_PREFIX 0x20000 532 #endif 533 534 /* RTnetlink multicast groups */ 535 enum rtnetlink_groups { 536 RTNLGRP_NONE, 537 #define RTNLGRP_NONE RTNLGRP_NONE 538 RTNLGRP_LINK, 539 #define RTNLGRP_LINK RTNLGRP_LINK 540 RTNLGRP_NOTIFY, 541 #define RTNLGRP_NOTIFY RTNLGRP_NOTIFY 542 RTNLGRP_NEIGH, 543 #define RTNLGRP_NEIGH RTNLGRP_NEIGH 544 RTNLGRP_TC, 545 #define RTNLGRP_TC RTNLGRP_TC 546 RTNLGRP_IPV4_IFADDR, 547 #define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR 548 RTNLGRP_IPV4_MROUTE, 549 #define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE 550 RTNLGRP_IPV4_ROUTE, 551 #define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE 552 RTNLGRP_IPV4_RULE, 553 #define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE 554 RTNLGRP_IPV6_IFADDR, 555 #define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR 556 RTNLGRP_IPV6_MROUTE, 557 #define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE 558 RTNLGRP_IPV6_ROUTE, 559 #define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE 560 RTNLGRP_IPV6_IFINFO, 561 #define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO 562 RTNLGRP_DECnet_IFADDR, 563 #define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR 564 RTNLGRP_NOP2, 565 RTNLGRP_DECnet_ROUTE, 566 #define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE 567 RTNLGRP_DECnet_RULE, 568 #define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE 569 RTNLGRP_NOP4, 570 RTNLGRP_IPV6_PREFIX, 571 #define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX 572 RTNLGRP_IPV6_RULE, 573 #define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE 574 RTNLGRP_ND_USEROPT, 575 #define RTNLGRP_ND_USEROPT RTNLGRP_ND_USEROPT 576 __RTNLGRP_MAX 577 }; 578 #define RTNLGRP_MAX (__RTNLGRP_MAX - 1) 579 580 /* TC action piece */ 581 struct tcamsg 582 { 583 unsigned char tca_family; 584 unsigned char tca__pad1; 585 unsigned short tca__pad2; 586 }; 587 #define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg)))) 588 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg)) 589 #define TCA_ACT_TAB 1 /* attr type must be >=1 */ 590 #define TCAA_MAX 1 591 592 /* End of information exported to user level */ 593 594 #ifdef __KERNEL__ 595 596 #include <linux/mutex.h> 597 598 extern size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size); 599 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str) 600 { 601 int len = strlen(str) + 1; 602 return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len); 603 } 604 605 extern int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len); 606 extern int __rtattr_parse_nested_compat(struct rtattr *tb[], int maxattr, 607 struct rtattr *rta, int len); 608 609 #define rtattr_parse_nested(tb, max, rta) \ 610 rtattr_parse((tb), (max), RTA_DATA((rta)), RTA_PAYLOAD((rta))) 611 612 #define rtattr_parse_nested_compat(tb, max, rta, data, len) \ 613 ({ data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \ 614 __rtattr_parse_nested_compat(tb, max, rta, len); }) 615 616 extern int rtnetlink_send(struct sk_buff *skb, u32 pid, u32 group, int echo); 617 extern int rtnl_unicast(struct sk_buff *skb, u32 pid); 618 extern int rtnl_notify(struct sk_buff *skb, u32 pid, u32 group, 619 struct nlmsghdr *nlh, gfp_t flags); 620 extern void rtnl_set_sk_err(u32 group, int error); 621 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics); 622 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, 623 u32 id, u32 ts, u32 tsage, long expires, 624 u32 error); 625 626 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data); 627 628 #define RTA_PUT(skb, attrtype, attrlen, data) \ 629 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \ 630 goto rtattr_failure; \ 631 __rta_fill(skb, attrtype, attrlen, data); }) 632 633 #define RTA_APPEND(skb, attrlen, data) \ 634 ({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \ 635 goto rtattr_failure; \ 636 memcpy(skb_put(skb, attrlen), data, attrlen); }) 637 638 #define RTA_PUT_NOHDR(skb, attrlen, data) \ 639 ({ RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \ 640 memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \ 641 RTA_ALIGN(attrlen) - attrlen); }) 642 643 #define RTA_PUT_U8(skb, attrtype, value) \ 644 ({ u8 _tmp = (value); \ 645 RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); }) 646 647 #define RTA_PUT_U16(skb, attrtype, value) \ 648 ({ u16 _tmp = (value); \ 649 RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); }) 650 651 #define RTA_PUT_U32(skb, attrtype, value) \ 652 ({ u32 _tmp = (value); \ 653 RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); }) 654 655 #define RTA_PUT_U64(skb, attrtype, value) \ 656 ({ u64 _tmp = (value); \ 657 RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); }) 658 659 #define RTA_PUT_SECS(skb, attrtype, value) \ 660 RTA_PUT_U64(skb, attrtype, (value) / HZ) 661 662 #define RTA_PUT_MSECS(skb, attrtype, value) \ 663 RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value)) 664 665 #define RTA_PUT_STRING(skb, attrtype, value) \ 666 RTA_PUT(skb, attrtype, strlen(value) + 1, value) 667 668 #define RTA_PUT_FLAG(skb, attrtype) \ 669 RTA_PUT(skb, attrtype, 0, NULL); 670 671 #define RTA_NEST(skb, type) \ 672 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \ 673 RTA_PUT(skb, type, 0, NULL); \ 674 __start; }) 675 676 #define RTA_NEST_END(skb, start) \ 677 ({ (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ 678 (skb)->len; }) 679 680 #define RTA_NEST_COMPAT(skb, type, attrlen, data) \ 681 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \ 682 RTA_PUT(skb, type, attrlen, data); \ 683 RTA_NEST(skb, type); \ 684 __start; }) 685 686 #define RTA_NEST_COMPAT_END(skb, start) \ 687 ({ struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \ 688 (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ 689 RTA_NEST_END(skb, __nest); \ 690 (skb)->len; }) 691 692 #define RTA_NEST_CANCEL(skb, start) \ 693 ({ if (start) \ 694 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \ 695 -1; }) 696 697 #define RTA_GET_U8(rta) \ 698 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \ 699 goto rtattr_failure; \ 700 *(u8 *) RTA_DATA(rta); }) 701 702 #define RTA_GET_U16(rta) \ 703 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \ 704 goto rtattr_failure; \ 705 *(u16 *) RTA_DATA(rta); }) 706 707 #define RTA_GET_U32(rta) \ 708 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \ 709 goto rtattr_failure; \ 710 *(u32 *) RTA_DATA(rta); }) 711 712 #define RTA_GET_U64(rta) \ 713 ({ u64 _tmp; \ 714 if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \ 715 goto rtattr_failure; \ 716 memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \ 717 _tmp; }) 718 719 #define RTA_GET_FLAG(rta) (!!(rta)) 720 721 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ) 722 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta))) 723 724 static inline struct rtattr * 725 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen) 726 { 727 struct rtattr *rta; 728 int size = RTA_LENGTH(attrlen); 729 730 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size)); 731 rta->rta_type = attrtype; 732 rta->rta_len = size; 733 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size); 734 return rta; 735 } 736 737 #define __RTA_PUT(skb, attrtype, attrlen) \ 738 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \ 739 goto rtattr_failure; \ 740 __rta_reserve(skb, attrtype, attrlen); }) 741 742 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change); 743 744 /* RTNL is used as a global lock for all changes to network configuration */ 745 extern void rtnl_lock(void); 746 extern void rtnl_unlock(void); 747 extern int rtnl_trylock(void); 748 749 extern void rtnetlink_init(void); 750 extern void __rtnl_unlock(void); 751 752 #define ASSERT_RTNL() do { \ 753 if (unlikely(rtnl_trylock())) { \ 754 rtnl_unlock(); \ 755 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \ 756 __FILE__, __LINE__); \ 757 dump_stack(); \ 758 } \ 759 } while(0) 760 761 #define BUG_TRAP(x) do { \ 762 if (unlikely(!(x))) { \ 763 printk(KERN_ERR "KERNEL: assertion (%s) failed at %s (%d)\n", \ 764 #x, __FILE__ , __LINE__); \ 765 } \ 766 } while(0) 767 768 static inline u32 rtm_get_table(struct rtattr **rta, u8 table) 769 { 770 return RTA_GET_U32(rta[RTA_TABLE-1]); 771 rtattr_failure: 772 return table; 773 } 774 775 #endif /* __KERNEL__ */ 776 777 778 #endif /* __LINUX_RTNETLINK_H */ 779