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_DEFAULT=253, 250 RT_TABLE_MAIN=254, 251 RT_TABLE_LOCAL=255, 252 RT_TABLE_MAX=0xFFFFFFFF 253 }; 254 255 256 /* Routing message attributes */ 257 258 enum rtattr_type_t 259 { 260 RTA_UNSPEC, 261 RTA_DST, 262 RTA_SRC, 263 RTA_IIF, 264 RTA_OIF, 265 RTA_GATEWAY, 266 RTA_PRIORITY, 267 RTA_PREFSRC, 268 RTA_METRICS, 269 RTA_MULTIPATH, 270 RTA_PROTOINFO, 271 RTA_FLOW, 272 RTA_CACHEINFO, 273 RTA_SESSION, 274 RTA_MP_ALGO, /* no longer used */ 275 RTA_TABLE, 276 __RTA_MAX 277 }; 278 279 #define RTA_MAX (__RTA_MAX - 1) 280 281 #define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg)))) 282 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg)) 283 284 /* RTM_MULTIPATH --- array of struct rtnexthop. 285 * 286 * "struct rtnexthop" describes all necessary nexthop information, 287 * i.e. parameters of path to a destination via this nexthop. 288 * 289 * At the moment it is impossible to set different prefsrc, mtu, window 290 * and rtt for different paths from multipath. 291 */ 292 293 struct rtnexthop 294 { 295 unsigned short rtnh_len; 296 unsigned char rtnh_flags; 297 unsigned char rtnh_hops; 298 int rtnh_ifindex; 299 }; 300 301 /* rtnh_flags */ 302 303 #define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */ 304 #define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */ 305 #define RTNH_F_ONLINK 4 /* Gateway is forced on link */ 306 307 /* Macros to handle hexthops */ 308 309 #define RTNH_ALIGNTO 4 310 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) ) 311 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \ 312 ((int)(rtnh)->rtnh_len) <= (len)) 313 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len))) 314 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len)) 315 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len)) 316 #define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0))) 317 318 /* RTM_CACHEINFO */ 319 320 struct rta_cacheinfo 321 { 322 __u32 rta_clntref; 323 __u32 rta_lastuse; 324 __s32 rta_expires; 325 __u32 rta_error; 326 __u32 rta_used; 327 328 #define RTNETLINK_HAVE_PEERINFO 1 329 __u32 rta_id; 330 __u32 rta_ts; 331 __u32 rta_tsage; 332 }; 333 334 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */ 335 336 enum 337 { 338 RTAX_UNSPEC, 339 #define RTAX_UNSPEC RTAX_UNSPEC 340 RTAX_LOCK, 341 #define RTAX_LOCK RTAX_LOCK 342 RTAX_MTU, 343 #define RTAX_MTU RTAX_MTU 344 RTAX_WINDOW, 345 #define RTAX_WINDOW RTAX_WINDOW 346 RTAX_RTT, 347 #define RTAX_RTT RTAX_RTT 348 RTAX_RTTVAR, 349 #define RTAX_RTTVAR RTAX_RTTVAR 350 RTAX_SSTHRESH, 351 #define RTAX_SSTHRESH RTAX_SSTHRESH 352 RTAX_CWND, 353 #define RTAX_CWND RTAX_CWND 354 RTAX_ADVMSS, 355 #define RTAX_ADVMSS RTAX_ADVMSS 356 RTAX_REORDERING, 357 #define RTAX_REORDERING RTAX_REORDERING 358 RTAX_HOPLIMIT, 359 #define RTAX_HOPLIMIT RTAX_HOPLIMIT 360 RTAX_INITCWND, 361 #define RTAX_INITCWND RTAX_INITCWND 362 RTAX_FEATURES, 363 #define RTAX_FEATURES RTAX_FEATURES 364 RTAX_RTO_MIN, 365 #define RTAX_RTO_MIN RTAX_RTO_MIN 366 __RTAX_MAX 367 }; 368 369 #define RTAX_MAX (__RTAX_MAX - 1) 370 371 #define RTAX_FEATURE_ECN 0x00000001 372 #define RTAX_FEATURE_SACK 0x00000002 373 #define RTAX_FEATURE_TIMESTAMP 0x00000004 374 #define RTAX_FEATURE_ALLFRAG 0x00000008 375 376 struct rta_session 377 { 378 __u8 proto; 379 __u8 pad1; 380 __u16 pad2; 381 382 union { 383 struct { 384 __u16 sport; 385 __u16 dport; 386 } ports; 387 388 struct { 389 __u8 type; 390 __u8 code; 391 __u16 ident; 392 } icmpt; 393 394 __u32 spi; 395 } u; 396 }; 397 398 /**** 399 * General form of address family dependent message. 400 ****/ 401 402 struct rtgenmsg 403 { 404 unsigned char rtgen_family; 405 }; 406 407 /***************************************************************** 408 * Link layer specific messages. 409 ****/ 410 411 /* struct ifinfomsg 412 * passes link level specific information, not dependent 413 * on network protocol. 414 */ 415 416 struct ifinfomsg 417 { 418 unsigned char ifi_family; 419 unsigned char __ifi_pad; 420 unsigned short ifi_type; /* ARPHRD_* */ 421 int ifi_index; /* Link index */ 422 unsigned ifi_flags; /* IFF_* flags */ 423 unsigned ifi_change; /* IFF_* change mask */ 424 }; 425 426 /******************************************************************** 427 * prefix information 428 ****/ 429 430 struct prefixmsg 431 { 432 unsigned char prefix_family; 433 unsigned char prefix_pad1; 434 unsigned short prefix_pad2; 435 int prefix_ifindex; 436 unsigned char prefix_type; 437 unsigned char prefix_len; 438 unsigned char prefix_flags; 439 unsigned char prefix_pad3; 440 }; 441 442 enum 443 { 444 PREFIX_UNSPEC, 445 PREFIX_ADDRESS, 446 PREFIX_CACHEINFO, 447 __PREFIX_MAX 448 }; 449 450 #define PREFIX_MAX (__PREFIX_MAX - 1) 451 452 struct prefix_cacheinfo 453 { 454 __u32 preferred_time; 455 __u32 valid_time; 456 }; 457 458 459 /***************************************************************** 460 * Traffic control messages. 461 ****/ 462 463 struct tcmsg 464 { 465 unsigned char tcm_family; 466 unsigned char tcm__pad1; 467 unsigned short tcm__pad2; 468 int tcm_ifindex; 469 __u32 tcm_handle; 470 __u32 tcm_parent; 471 __u32 tcm_info; 472 }; 473 474 enum 475 { 476 TCA_UNSPEC, 477 TCA_KIND, 478 TCA_OPTIONS, 479 TCA_STATS, 480 TCA_XSTATS, 481 TCA_RATE, 482 TCA_FCNT, 483 TCA_STATS2, 484 __TCA_MAX 485 }; 486 487 #define TCA_MAX (__TCA_MAX - 1) 488 489 #define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg)))) 490 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg)) 491 492 /******************************************************************** 493 * Neighbor Discovery userland options 494 ****/ 495 496 struct nduseroptmsg 497 { 498 unsigned char nduseropt_family; 499 unsigned char nduseropt_pad1; 500 unsigned short nduseropt_opts_len; /* Total length of options */ 501 int nduseropt_ifindex; 502 __u8 nduseropt_icmp_type; 503 __u8 nduseropt_icmp_code; 504 unsigned short nduseropt_pad2; 505 unsigned int nduseropt_pad3; 506 /* Followed by one or more ND options */ 507 }; 508 509 enum 510 { 511 NDUSEROPT_UNSPEC, 512 NDUSEROPT_SRCADDR, 513 __NDUSEROPT_MAX 514 }; 515 516 #define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1) 517 518 #ifndef __KERNEL__ 519 /* RTnetlink multicast groups - backwards compatibility for userspace */ 520 #define RTMGRP_LINK 1 521 #define RTMGRP_NOTIFY 2 522 #define RTMGRP_NEIGH 4 523 #define RTMGRP_TC 8 524 525 #define RTMGRP_IPV4_IFADDR 0x10 526 #define RTMGRP_IPV4_MROUTE 0x20 527 #define RTMGRP_IPV4_ROUTE 0x40 528 #define RTMGRP_IPV4_RULE 0x80 529 530 #define RTMGRP_IPV6_IFADDR 0x100 531 #define RTMGRP_IPV6_MROUTE 0x200 532 #define RTMGRP_IPV6_ROUTE 0x400 533 #define RTMGRP_IPV6_IFINFO 0x800 534 535 #define RTMGRP_DECnet_IFADDR 0x1000 536 #define RTMGRP_DECnet_ROUTE 0x4000 537 538 #define RTMGRP_IPV6_PREFIX 0x20000 539 #endif 540 541 /* RTnetlink multicast groups */ 542 enum rtnetlink_groups { 543 RTNLGRP_NONE, 544 #define RTNLGRP_NONE RTNLGRP_NONE 545 RTNLGRP_LINK, 546 #define RTNLGRP_LINK RTNLGRP_LINK 547 RTNLGRP_NOTIFY, 548 #define RTNLGRP_NOTIFY RTNLGRP_NOTIFY 549 RTNLGRP_NEIGH, 550 #define RTNLGRP_NEIGH RTNLGRP_NEIGH 551 RTNLGRP_TC, 552 #define RTNLGRP_TC RTNLGRP_TC 553 RTNLGRP_IPV4_IFADDR, 554 #define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR 555 RTNLGRP_IPV4_MROUTE, 556 #define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE 557 RTNLGRP_IPV4_ROUTE, 558 #define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE 559 RTNLGRP_IPV4_RULE, 560 #define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE 561 RTNLGRP_IPV6_IFADDR, 562 #define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR 563 RTNLGRP_IPV6_MROUTE, 564 #define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE 565 RTNLGRP_IPV6_ROUTE, 566 #define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE 567 RTNLGRP_IPV6_IFINFO, 568 #define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO 569 RTNLGRP_DECnet_IFADDR, 570 #define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR 571 RTNLGRP_NOP2, 572 RTNLGRP_DECnet_ROUTE, 573 #define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE 574 RTNLGRP_DECnet_RULE, 575 #define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE 576 RTNLGRP_NOP4, 577 RTNLGRP_IPV6_PREFIX, 578 #define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX 579 RTNLGRP_IPV6_RULE, 580 #define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE 581 RTNLGRP_ND_USEROPT, 582 #define RTNLGRP_ND_USEROPT RTNLGRP_ND_USEROPT 583 __RTNLGRP_MAX 584 }; 585 #define RTNLGRP_MAX (__RTNLGRP_MAX - 1) 586 587 /* TC action piece */ 588 struct tcamsg 589 { 590 unsigned char tca_family; 591 unsigned char tca__pad1; 592 unsigned short tca__pad2; 593 }; 594 #define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg)))) 595 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg)) 596 #define TCA_ACT_TAB 1 /* attr type must be >=1 */ 597 #define TCAA_MAX 1 598 599 /* End of information exported to user level */ 600 601 #ifdef __KERNEL__ 602 603 #include <linux/mutex.h> 604 605 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str) 606 { 607 int len = strlen(str) + 1; 608 return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len); 609 } 610 611 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo); 612 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid); 613 extern int rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 614 struct nlmsghdr *nlh, gfp_t flags); 615 extern void rtnl_set_sk_err(struct net *net, u32 group, int error); 616 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics); 617 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, 618 u32 id, u32 ts, u32 tsage, long expires, 619 u32 error); 620 621 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data); 622 623 #define RTA_PUT(skb, attrtype, attrlen, data) \ 624 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \ 625 goto rtattr_failure; \ 626 __rta_fill(skb, attrtype, attrlen, data); }) 627 628 #define RTA_APPEND(skb, attrlen, data) \ 629 ({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \ 630 goto rtattr_failure; \ 631 memcpy(skb_put(skb, attrlen), data, attrlen); }) 632 633 #define RTA_PUT_NOHDR(skb, attrlen, data) \ 634 ({ RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \ 635 memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \ 636 RTA_ALIGN(attrlen) - attrlen); }) 637 638 #define RTA_PUT_U8(skb, attrtype, value) \ 639 ({ u8 _tmp = (value); \ 640 RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); }) 641 642 #define RTA_PUT_U16(skb, attrtype, value) \ 643 ({ u16 _tmp = (value); \ 644 RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); }) 645 646 #define RTA_PUT_U32(skb, attrtype, value) \ 647 ({ u32 _tmp = (value); \ 648 RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); }) 649 650 #define RTA_PUT_U64(skb, attrtype, value) \ 651 ({ u64 _tmp = (value); \ 652 RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); }) 653 654 #define RTA_PUT_SECS(skb, attrtype, value) \ 655 RTA_PUT_U64(skb, attrtype, (value) / HZ) 656 657 #define RTA_PUT_MSECS(skb, attrtype, value) \ 658 RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value)) 659 660 #define RTA_PUT_STRING(skb, attrtype, value) \ 661 RTA_PUT(skb, attrtype, strlen(value) + 1, value) 662 663 #define RTA_PUT_FLAG(skb, attrtype) \ 664 RTA_PUT(skb, attrtype, 0, NULL); 665 666 #define RTA_NEST(skb, type) \ 667 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \ 668 RTA_PUT(skb, type, 0, NULL); \ 669 __start; }) 670 671 #define RTA_NEST_END(skb, start) \ 672 ({ (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ 673 (skb)->len; }) 674 675 #define RTA_NEST_COMPAT(skb, type, attrlen, data) \ 676 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \ 677 RTA_PUT(skb, type, attrlen, data); \ 678 RTA_NEST(skb, type); \ 679 __start; }) 680 681 #define RTA_NEST_COMPAT_END(skb, start) \ 682 ({ struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \ 683 (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ 684 RTA_NEST_END(skb, __nest); \ 685 (skb)->len; }) 686 687 #define RTA_NEST_CANCEL(skb, start) \ 688 ({ if (start) \ 689 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \ 690 -1; }) 691 692 #define RTA_GET_U8(rta) \ 693 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \ 694 goto rtattr_failure; \ 695 *(u8 *) RTA_DATA(rta); }) 696 697 #define RTA_GET_U16(rta) \ 698 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \ 699 goto rtattr_failure; \ 700 *(u16 *) RTA_DATA(rta); }) 701 702 #define RTA_GET_U32(rta) \ 703 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \ 704 goto rtattr_failure; \ 705 *(u32 *) RTA_DATA(rta); }) 706 707 #define RTA_GET_U64(rta) \ 708 ({ u64 _tmp; \ 709 if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \ 710 goto rtattr_failure; \ 711 memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \ 712 _tmp; }) 713 714 #define RTA_GET_FLAG(rta) (!!(rta)) 715 716 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ) 717 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta))) 718 719 static inline struct rtattr * 720 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen) 721 { 722 struct rtattr *rta; 723 int size = RTA_LENGTH(attrlen); 724 725 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size)); 726 rta->rta_type = attrtype; 727 rta->rta_len = size; 728 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size); 729 return rta; 730 } 731 732 #define __RTA_PUT(skb, attrtype, attrlen) \ 733 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \ 734 goto rtattr_failure; \ 735 __rta_reserve(skb, attrtype, attrlen); }) 736 737 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change); 738 739 /* RTNL is used as a global lock for all changes to network configuration */ 740 extern void rtnl_lock(void); 741 extern void rtnl_unlock(void); 742 extern int rtnl_trylock(void); 743 744 extern void rtnetlink_init(void); 745 extern void __rtnl_unlock(void); 746 747 #define ASSERT_RTNL() do { \ 748 if (unlikely(rtnl_trylock())) { \ 749 rtnl_unlock(); \ 750 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \ 751 __FILE__, __LINE__); \ 752 dump_stack(); \ 753 } \ 754 } while(0) 755 756 #define BUG_TRAP(x) do { \ 757 if (unlikely(!(x))) { \ 758 printk(KERN_ERR "KERNEL: assertion (%s) failed at %s (%d)\n", \ 759 #x, __FILE__ , __LINE__); \ 760 } \ 761 } while(0) 762 763 static inline u32 rtm_get_table(struct rtattr **rta, u8 table) 764 { 765 return RTA_GET_U32(rta[RTA_TABLE-1]); 766 rtattr_failure: 767 return table; 768 } 769 770 #endif /* __KERNEL__ */ 771 772 773 #endif /* __LINUX_RTNETLINK_H */ 774