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_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 */ 123 124 struct 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 ****/ 150 151 struct 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 */ 167 168 enum 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 */ 214 215 /* rtm_scope 216 217 Really it is not scope, but sort of distance to the destination. 218 NOWHERE are reserved for not existing destinations, HOST is our 219 local addresses, LINK are destinations, located on directly attached 220 link and UNIVERSE is everywhere in the Universe. 221 222 Intermediate values are also possible f.e. interior routes 223 could be assigned a value between UNIVERSE and LINK. 224 */ 225 226 enum rt_scope_t 227 { 228 RT_SCOPE_UNIVERSE=0, 229 /* User defined values */ 230 RT_SCOPE_SITE=200, 231 RT_SCOPE_LINK=253, 232 RT_SCOPE_HOST=254, 233 RT_SCOPE_NOWHERE=255 234 }; 235 236 /* rtm_flags */ 237 238 #define RTM_F_NOTIFY 0x100 /* Notify user of route change */ 239 #define RTM_F_CLONED 0x200 /* This route is cloned */ 240 #define RTM_F_EQUALIZE 0x400 /* Multipath equalizer: NI */ 241 #define RTM_F_PREFIX 0x800 /* Prefix addresses */ 242 243 /* Reserved table identifiers */ 244 245 enum rt_class_t 246 { 247 RT_TABLE_UNSPEC=0, 248 /* User defined values */ 249 RT_TABLE_COMPAT=252, 250 RT_TABLE_DEFAULT=253, 251 RT_TABLE_MAIN=254, 252 RT_TABLE_LOCAL=255, 253 RT_TABLE_MAX=0xFFFFFFFF 254 }; 255 256 257 /* Routing message attributes */ 258 259 enum rtattr_type_t 260 { 261 RTA_UNSPEC, 262 RTA_DST, 263 RTA_SRC, 264 RTA_IIF, 265 RTA_OIF, 266 RTA_GATEWAY, 267 RTA_PRIORITY, 268 RTA_PREFSRC, 269 RTA_METRICS, 270 RTA_MULTIPATH, 271 RTA_PROTOINFO, /* no longer used */ 272 RTA_FLOW, 273 RTA_CACHEINFO, 274 RTA_SESSION, /* no longer used */ 275 RTA_MP_ALGO, /* no longer used */ 276 RTA_TABLE, 277 __RTA_MAX 278 }; 279 280 #define RTA_MAX (__RTA_MAX - 1) 281 282 #define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg)))) 283 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg)) 284 285 /* RTM_MULTIPATH --- array of struct rtnexthop. 286 * 287 * "struct rtnexthop" describes all necessary nexthop information, 288 * i.e. parameters of path to a destination via this nexthop. 289 * 290 * At the moment it is impossible to set different prefsrc, mtu, window 291 * and rtt for different paths from multipath. 292 */ 293 294 struct rtnexthop 295 { 296 unsigned short rtnh_len; 297 unsigned char rtnh_flags; 298 unsigned char rtnh_hops; 299 int rtnh_ifindex; 300 }; 301 302 /* rtnh_flags */ 303 304 #define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */ 305 #define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */ 306 #define RTNH_F_ONLINK 4 /* Gateway is forced on link */ 307 308 /* Macros to handle hexthops */ 309 310 #define RTNH_ALIGNTO 4 311 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) ) 312 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \ 313 ((int)(rtnh)->rtnh_len) <= (len)) 314 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len))) 315 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len)) 316 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len)) 317 #define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0))) 318 319 /* RTM_CACHEINFO */ 320 321 struct rta_cacheinfo 322 { 323 __u32 rta_clntref; 324 __u32 rta_lastuse; 325 __s32 rta_expires; 326 __u32 rta_error; 327 __u32 rta_used; 328 329 #define RTNETLINK_HAVE_PEERINFO 1 330 __u32 rta_id; 331 __u32 rta_ts; 332 __u32 rta_tsage; 333 }; 334 335 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */ 336 337 enum 338 { 339 RTAX_UNSPEC, 340 #define RTAX_UNSPEC RTAX_UNSPEC 341 RTAX_LOCK, 342 #define RTAX_LOCK RTAX_LOCK 343 RTAX_MTU, 344 #define RTAX_MTU RTAX_MTU 345 RTAX_WINDOW, 346 #define RTAX_WINDOW RTAX_WINDOW 347 RTAX_RTT, 348 #define RTAX_RTT RTAX_RTT 349 RTAX_RTTVAR, 350 #define RTAX_RTTVAR RTAX_RTTVAR 351 RTAX_SSTHRESH, 352 #define RTAX_SSTHRESH RTAX_SSTHRESH 353 RTAX_CWND, 354 #define RTAX_CWND RTAX_CWND 355 RTAX_ADVMSS, 356 #define RTAX_ADVMSS RTAX_ADVMSS 357 RTAX_REORDERING, 358 #define RTAX_REORDERING RTAX_REORDERING 359 RTAX_HOPLIMIT, 360 #define RTAX_HOPLIMIT RTAX_HOPLIMIT 361 RTAX_INITCWND, 362 #define RTAX_INITCWND RTAX_INITCWND 363 RTAX_FEATURES, 364 #define RTAX_FEATURES RTAX_FEATURES 365 RTAX_RTO_MIN, 366 #define RTAX_RTO_MIN RTAX_RTO_MIN 367 __RTAX_MAX 368 }; 369 370 #define RTAX_MAX (__RTAX_MAX - 1) 371 372 #define RTAX_FEATURE_ECN 0x00000001 373 #define RTAX_FEATURE_SACK 0x00000002 374 #define RTAX_FEATURE_TIMESTAMP 0x00000004 375 #define RTAX_FEATURE_ALLFRAG 0x00000008 376 377 struct rta_session 378 { 379 __u8 proto; 380 __u8 pad1; 381 __u16 pad2; 382 383 union { 384 struct { 385 __u16 sport; 386 __u16 dport; 387 } ports; 388 389 struct { 390 __u8 type; 391 __u8 code; 392 __u16 ident; 393 } icmpt; 394 395 __u32 spi; 396 } u; 397 }; 398 399 /**** 400 * General form of address family dependent message. 401 ****/ 402 403 struct rtgenmsg 404 { 405 unsigned char rtgen_family; 406 }; 407 408 /***************************************************************** 409 * Link layer specific messages. 410 ****/ 411 412 /* struct ifinfomsg 413 * passes link level specific information, not dependent 414 * on network protocol. 415 */ 416 417 struct ifinfomsg 418 { 419 unsigned char ifi_family; 420 unsigned char __ifi_pad; 421 unsigned short ifi_type; /* ARPHRD_* */ 422 int ifi_index; /* Link index */ 423 unsigned ifi_flags; /* IFF_* flags */ 424 unsigned ifi_change; /* IFF_* change mask */ 425 }; 426 427 /******************************************************************** 428 * prefix information 429 ****/ 430 431 struct prefixmsg 432 { 433 unsigned char prefix_family; 434 unsigned char prefix_pad1; 435 unsigned short prefix_pad2; 436 int prefix_ifindex; 437 unsigned char prefix_type; 438 unsigned char prefix_len; 439 unsigned char prefix_flags; 440 unsigned char prefix_pad3; 441 }; 442 443 enum 444 { 445 PREFIX_UNSPEC, 446 PREFIX_ADDRESS, 447 PREFIX_CACHEINFO, 448 __PREFIX_MAX 449 }; 450 451 #define PREFIX_MAX (__PREFIX_MAX - 1) 452 453 struct prefix_cacheinfo 454 { 455 __u32 preferred_time; 456 __u32 valid_time; 457 }; 458 459 460 /***************************************************************** 461 * Traffic control messages. 462 ****/ 463 464 struct tcmsg 465 { 466 unsigned char tcm_family; 467 unsigned char tcm__pad1; 468 unsigned short tcm__pad2; 469 int tcm_ifindex; 470 __u32 tcm_handle; 471 __u32 tcm_parent; 472 __u32 tcm_info; 473 }; 474 475 enum 476 { 477 TCA_UNSPEC, 478 TCA_KIND, 479 TCA_OPTIONS, 480 TCA_STATS, 481 TCA_XSTATS, 482 TCA_RATE, 483 TCA_FCNT, 484 TCA_STATS2, 485 TCA_STAB, 486 __TCA_MAX 487 }; 488 489 #define TCA_MAX (__TCA_MAX - 1) 490 491 #define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg)))) 492 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg)) 493 494 /******************************************************************** 495 * Neighbor Discovery userland options 496 ****/ 497 498 struct nduseroptmsg 499 { 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 }; 510 511 enum 512 { 513 NDUSEROPT_UNSPEC, 514 NDUSEROPT_SRCADDR, 515 __NDUSEROPT_MAX 516 }; 517 518 #define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1) 519 520 #ifndef __KERNEL__ 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 #endif 542 543 /* RTnetlink multicast groups */ 544 enum rtnetlink_groups { 545 RTNLGRP_NONE, 546 #define RTNLGRP_NONE RTNLGRP_NONE 547 RTNLGRP_LINK, 548 #define RTNLGRP_LINK RTNLGRP_LINK 549 RTNLGRP_NOTIFY, 550 #define RTNLGRP_NOTIFY RTNLGRP_NOTIFY 551 RTNLGRP_NEIGH, 552 #define RTNLGRP_NEIGH RTNLGRP_NEIGH 553 RTNLGRP_TC, 554 #define RTNLGRP_TC RTNLGRP_TC 555 RTNLGRP_IPV4_IFADDR, 556 #define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR 557 RTNLGRP_IPV4_MROUTE, 558 #define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE 559 RTNLGRP_IPV4_ROUTE, 560 #define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE 561 RTNLGRP_IPV4_RULE, 562 #define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE 563 RTNLGRP_IPV6_IFADDR, 564 #define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR 565 RTNLGRP_IPV6_MROUTE, 566 #define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE 567 RTNLGRP_IPV6_ROUTE, 568 #define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE 569 RTNLGRP_IPV6_IFINFO, 570 #define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO 571 RTNLGRP_DECnet_IFADDR, 572 #define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR 573 RTNLGRP_NOP2, 574 RTNLGRP_DECnet_ROUTE, 575 #define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE 576 RTNLGRP_DECnet_RULE, 577 #define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE 578 RTNLGRP_NOP4, 579 RTNLGRP_IPV6_PREFIX, 580 #define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX 581 RTNLGRP_IPV6_RULE, 582 #define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE 583 RTNLGRP_ND_USEROPT, 584 #define RTNLGRP_ND_USEROPT RTNLGRP_ND_USEROPT 585 __RTNLGRP_MAX 586 }; 587 #define RTNLGRP_MAX (__RTNLGRP_MAX - 1) 588 589 /* TC action piece */ 590 struct tcamsg 591 { 592 unsigned char tca_family; 593 unsigned char tca__pad1; 594 unsigned short tca__pad2; 595 }; 596 #define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg)))) 597 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg)) 598 #define TCA_ACT_TAB 1 /* attr type must be >=1 */ 599 #define TCAA_MAX 1 600 601 /* End of information exported to user level */ 602 603 #ifdef __KERNEL__ 604 605 #include <linux/mutex.h> 606 607 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str) 608 { 609 int len = strlen(str) + 1; 610 return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len); 611 } 612 613 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo); 614 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid); 615 extern int rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 616 struct nlmsghdr *nlh, gfp_t flags); 617 extern void rtnl_set_sk_err(struct net *net, u32 group, int error); 618 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics); 619 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, 620 u32 id, u32 ts, u32 tsage, long expires, 621 u32 error); 622 623 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data); 624 625 #define RTA_PUT(skb, attrtype, attrlen, data) \ 626 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \ 627 goto rtattr_failure; \ 628 __rta_fill(skb, attrtype, attrlen, data); }) 629 630 #define RTA_APPEND(skb, attrlen, data) \ 631 ({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \ 632 goto rtattr_failure; \ 633 memcpy(skb_put(skb, attrlen), data, attrlen); }) 634 635 #define RTA_PUT_NOHDR(skb, attrlen, data) \ 636 ({ RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \ 637 memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \ 638 RTA_ALIGN(attrlen) - attrlen); }) 639 640 #define RTA_PUT_U8(skb, attrtype, value) \ 641 ({ u8 _tmp = (value); \ 642 RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); }) 643 644 #define RTA_PUT_U16(skb, attrtype, value) \ 645 ({ u16 _tmp = (value); \ 646 RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); }) 647 648 #define RTA_PUT_U32(skb, attrtype, value) \ 649 ({ u32 _tmp = (value); \ 650 RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); }) 651 652 #define RTA_PUT_U64(skb, attrtype, value) \ 653 ({ u64 _tmp = (value); \ 654 RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); }) 655 656 #define RTA_PUT_SECS(skb, attrtype, value) \ 657 RTA_PUT_U64(skb, attrtype, (value) / HZ) 658 659 #define RTA_PUT_MSECS(skb, attrtype, value) \ 660 RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value)) 661 662 #define RTA_PUT_STRING(skb, attrtype, value) \ 663 RTA_PUT(skb, attrtype, strlen(value) + 1, value) 664 665 #define RTA_PUT_FLAG(skb, attrtype) \ 666 RTA_PUT(skb, attrtype, 0, NULL); 667 668 #define RTA_NEST(skb, type) \ 669 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \ 670 RTA_PUT(skb, type, 0, NULL); \ 671 __start; }) 672 673 #define RTA_NEST_END(skb, start) \ 674 ({ (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ 675 (skb)->len; }) 676 677 #define RTA_NEST_COMPAT(skb, type, attrlen, data) \ 678 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \ 679 RTA_PUT(skb, type, attrlen, data); \ 680 RTA_NEST(skb, type); \ 681 __start; }) 682 683 #define RTA_NEST_COMPAT_END(skb, start) \ 684 ({ struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \ 685 (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ 686 RTA_NEST_END(skb, __nest); \ 687 (skb)->len; }) 688 689 #define RTA_NEST_CANCEL(skb, start) \ 690 ({ if (start) \ 691 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \ 692 -1; }) 693 694 #define RTA_GET_U8(rta) \ 695 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \ 696 goto rtattr_failure; \ 697 *(u8 *) RTA_DATA(rta); }) 698 699 #define RTA_GET_U16(rta) \ 700 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \ 701 goto rtattr_failure; \ 702 *(u16 *) RTA_DATA(rta); }) 703 704 #define RTA_GET_U32(rta) \ 705 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \ 706 goto rtattr_failure; \ 707 *(u32 *) RTA_DATA(rta); }) 708 709 #define RTA_GET_U64(rta) \ 710 ({ u64 _tmp; \ 711 if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \ 712 goto rtattr_failure; \ 713 memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \ 714 _tmp; }) 715 716 #define RTA_GET_FLAG(rta) (!!(rta)) 717 718 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ) 719 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta))) 720 721 static inline struct rtattr * 722 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen) 723 { 724 struct rtattr *rta; 725 int size = RTA_LENGTH(attrlen); 726 727 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size)); 728 rta->rta_type = attrtype; 729 rta->rta_len = size; 730 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size); 731 return rta; 732 } 733 734 #define __RTA_PUT(skb, attrtype, attrlen) \ 735 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \ 736 goto rtattr_failure; \ 737 __rta_reserve(skb, attrtype, attrlen); }) 738 739 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change); 740 741 /* RTNL is used as a global lock for all changes to network configuration */ 742 extern void rtnl_lock(void); 743 extern void rtnl_unlock(void); 744 extern int rtnl_trylock(void); 745 extern int rtnl_is_locked(void); 746 747 extern void rtnetlink_init(void); 748 extern void __rtnl_unlock(void); 749 750 #define ASSERT_RTNL() do { \ 751 if (unlikely(!rtnl_is_locked())) { \ 752 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \ 753 __FILE__, __LINE__); \ 754 dump_stack(); \ 755 } \ 756 } while(0) 757 758 #define BUG_TRAP(x) do { \ 759 if (unlikely(!(x))) { \ 760 printk(KERN_ERR "KERNEL: assertion (%s) failed at %s (%d)\n", \ 761 #x, __FILE__ , __LINE__); \ 762 } \ 763 } while(0) 764 765 static inline u32 rtm_get_table(struct rtattr **rta, u8 table) 766 { 767 return RTA_GET_U32(rta[RTA_TABLE-1]); 768 rtattr_failure: 769 return table; 770 } 771 772 #endif /* __KERNEL__ */ 773 774 775 #endif /* __LINUX_RTNETLINK_H */ 776