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_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 */ 113 114 struct 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 ****/ 140 141 struct 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 */ 157 158 enum 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 */ 215 216 enum 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 */ 234 235 enum 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 */ 247 248 enum 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 */ 282 283 struct 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 */ 309 310 struct 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_* */ 325 326 enum 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 363 364 struct 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 ****/ 389 390 struct 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 */ 403 404 struct 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 ****/ 417 418 struct 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 }; 429 430 enum 431 { 432 PREFIX_UNSPEC, 433 PREFIX_ADDRESS, 434 PREFIX_CACHEINFO, 435 __PREFIX_MAX 436 }; 437 438 #define PREFIX_MAX (__PREFIX_MAX - 1) 439 440 struct prefix_cacheinfo 441 { 442 __u32 preferred_time; 443 __u32 valid_time; 444 }; 445 446 447 /***************************************************************** 448 * Traffic control messages. 449 ****/ 450 451 struct 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 }; 461 462 enum 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 #ifndef __KERNEL__ 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 #endif 502 503 /* RTnetlink multicast groups */ 504 enum rtnetlink_groups { 505 RTNLGRP_NONE, 506 #define RTNLGRP_NONE RTNLGRP_NONE 507 RTNLGRP_LINK, 508 #define RTNLGRP_LINK RTNLGRP_LINK 509 RTNLGRP_NOTIFY, 510 #define RTNLGRP_NOTIFY RTNLGRP_NOTIFY 511 RTNLGRP_NEIGH, 512 #define RTNLGRP_NEIGH RTNLGRP_NEIGH 513 RTNLGRP_TC, 514 #define RTNLGRP_TC RTNLGRP_TC 515 RTNLGRP_IPV4_IFADDR, 516 #define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR 517 RTNLGRP_IPV4_MROUTE, 518 #define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE 519 RTNLGRP_IPV4_ROUTE, 520 #define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE 521 RTNLGRP_IPV4_RULE, 522 #define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE 523 RTNLGRP_IPV6_IFADDR, 524 #define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR 525 RTNLGRP_IPV6_MROUTE, 526 #define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE 527 RTNLGRP_IPV6_ROUTE, 528 #define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE 529 RTNLGRP_IPV6_IFINFO, 530 #define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO 531 RTNLGRP_DECnet_IFADDR, 532 #define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR 533 RTNLGRP_NOP2, 534 RTNLGRP_DECnet_ROUTE, 535 #define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE 536 RTNLGRP_DECnet_RULE, 537 #define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE 538 RTNLGRP_NOP4, 539 RTNLGRP_IPV6_PREFIX, 540 #define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX 541 RTNLGRP_IPV6_RULE, 542 #define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE 543 __RTNLGRP_MAX 544 }; 545 #define RTNLGRP_MAX (__RTNLGRP_MAX - 1) 546 547 /* TC action piece */ 548 struct tcamsg 549 { 550 unsigned char tca_family; 551 unsigned char tca__pad1; 552 unsigned short tca__pad2; 553 }; 554 #define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg)))) 555 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg)) 556 #define TCA_ACT_TAB 1 /* attr type must be >=1 */ 557 #define TCAA_MAX 1 558 559 /* End of information exported to user level */ 560 561 #ifdef __KERNEL__ 562 563 #include <linux/mutex.h> 564 565 extern size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size); 566 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str) 567 { 568 int len = strlen(str) + 1; 569 return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len); 570 } 571 572 extern int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len); 573 extern int __rtattr_parse_nested_compat(struct rtattr *tb[], int maxattr, 574 struct rtattr *rta, int len); 575 576 #define rtattr_parse_nested(tb, max, rta) \ 577 rtattr_parse((tb), (max), RTA_DATA((rta)), RTA_PAYLOAD((rta))) 578 579 #define rtattr_parse_nested_compat(tb, max, rta, data, len) \ 580 ({ data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \ 581 __rtattr_parse_nested_compat(tb, max, rta, len); }) 582 583 extern int rtnetlink_send(struct sk_buff *skb, u32 pid, u32 group, int echo); 584 extern int rtnl_unicast(struct sk_buff *skb, u32 pid); 585 extern int rtnl_notify(struct sk_buff *skb, u32 pid, u32 group, 586 struct nlmsghdr *nlh, gfp_t flags); 587 extern void rtnl_set_sk_err(u32 group, int error); 588 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics); 589 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, 590 u32 id, u32 ts, u32 tsage, long expires, 591 u32 error); 592 593 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data); 594 595 #define RTA_PUT(skb, attrtype, attrlen, data) \ 596 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \ 597 goto rtattr_failure; \ 598 __rta_fill(skb, attrtype, attrlen, data); }) 599 600 #define RTA_APPEND(skb, attrlen, data) \ 601 ({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \ 602 goto rtattr_failure; \ 603 memcpy(skb_put(skb, attrlen), data, attrlen); }) 604 605 #define RTA_PUT_NOHDR(skb, attrlen, data) \ 606 ({ RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \ 607 memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \ 608 RTA_ALIGN(attrlen) - attrlen); }) 609 610 #define RTA_PUT_U8(skb, attrtype, value) \ 611 ({ u8 _tmp = (value); \ 612 RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); }) 613 614 #define RTA_PUT_U16(skb, attrtype, value) \ 615 ({ u16 _tmp = (value); \ 616 RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); }) 617 618 #define RTA_PUT_U32(skb, attrtype, value) \ 619 ({ u32 _tmp = (value); \ 620 RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); }) 621 622 #define RTA_PUT_U64(skb, attrtype, value) \ 623 ({ u64 _tmp = (value); \ 624 RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); }) 625 626 #define RTA_PUT_SECS(skb, attrtype, value) \ 627 RTA_PUT_U64(skb, attrtype, (value) / HZ) 628 629 #define RTA_PUT_MSECS(skb, attrtype, value) \ 630 RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value)) 631 632 #define RTA_PUT_STRING(skb, attrtype, value) \ 633 RTA_PUT(skb, attrtype, strlen(value) + 1, value) 634 635 #define RTA_PUT_FLAG(skb, attrtype) \ 636 RTA_PUT(skb, attrtype, 0, NULL); 637 638 #define RTA_NEST(skb, type) \ 639 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \ 640 RTA_PUT(skb, type, 0, NULL); \ 641 __start; }) 642 643 #define RTA_NEST_END(skb, start) \ 644 ({ (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ 645 (skb)->len; }) 646 647 #define RTA_NEST_COMPAT(skb, type, attrlen, data) \ 648 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \ 649 RTA_PUT(skb, type, attrlen, data); \ 650 RTA_NEST(skb, type); \ 651 __start; }) 652 653 #define RTA_NEST_COMPAT_END(skb, start) \ 654 ({ struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \ 655 (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ 656 RTA_NEST_END(skb, __nest); \ 657 (skb)->len; }) 658 659 #define RTA_NEST_CANCEL(skb, start) \ 660 ({ if (start) \ 661 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \ 662 -1; }) 663 664 #define RTA_GET_U8(rta) \ 665 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \ 666 goto rtattr_failure; \ 667 *(u8 *) RTA_DATA(rta); }) 668 669 #define RTA_GET_U16(rta) \ 670 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \ 671 goto rtattr_failure; \ 672 *(u16 *) RTA_DATA(rta); }) 673 674 #define RTA_GET_U32(rta) \ 675 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \ 676 goto rtattr_failure; \ 677 *(u32 *) RTA_DATA(rta); }) 678 679 #define RTA_GET_U64(rta) \ 680 ({ u64 _tmp; \ 681 if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \ 682 goto rtattr_failure; \ 683 memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \ 684 _tmp; }) 685 686 #define RTA_GET_FLAG(rta) (!!(rta)) 687 688 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ) 689 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta))) 690 691 static inline struct rtattr * 692 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen) 693 { 694 struct rtattr *rta; 695 int size = RTA_LENGTH(attrlen); 696 697 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size)); 698 rta->rta_type = attrtype; 699 rta->rta_len = size; 700 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size); 701 return rta; 702 } 703 704 #define __RTA_PUT(skb, attrtype, attrlen) \ 705 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \ 706 goto rtattr_failure; \ 707 __rta_reserve(skb, attrtype, attrlen); }) 708 709 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change); 710 711 /* RTNL is used as a global lock for all changes to network configuration */ 712 extern void rtnl_lock(void); 713 extern void rtnl_unlock(void); 714 extern int rtnl_trylock(void); 715 716 extern void rtnetlink_init(void); 717 extern void __rtnl_unlock(void); 718 719 #define ASSERT_RTNL() do { \ 720 if (unlikely(rtnl_trylock())) { \ 721 rtnl_unlock(); \ 722 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \ 723 __FILE__, __LINE__); \ 724 dump_stack(); \ 725 } \ 726 } while(0) 727 728 #define BUG_TRAP(x) do { \ 729 if (unlikely(!(x))) { \ 730 printk(KERN_ERR "KERNEL: assertion (%s) failed at %s (%d)\n", \ 731 #x, __FILE__ , __LINE__); \ 732 } \ 733 } while(0) 734 735 static inline u32 rtm_get_table(struct rtattr **rta, u8 table) 736 { 737 return RTA_GET_U32(rta[RTA_TABLE-1]); 738 rtattr_failure: 739 return table; 740 } 741 742 #endif /* __KERNEL__ */ 743 744 745 #endif /* __LINUX_RTNETLINK_H */ 746