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_GETDCB = 78, 111 #define RTM_GETDCB RTM_GETDCB 112 RTM_SETDCB, 113 #define RTM_SETDCB RTM_SETDCB 114 115 __RTM_MAX, 116 #define RTM_MAX (((__RTM_MAX + 3) & ~3) - 1) 117 }; 118 119 #define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE) 120 #define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2) 121 #define RTM_FAM(cmd) (((cmd) - RTM_BASE) >> 2) 122 123 /* 124 Generic structure for encapsulation of optional route information. 125 It is reminiscent of sockaddr, but with sa_family replaced 126 with attribute type. 127 */ 128 129 struct rtattr 130 { 131 unsigned short rta_len; 132 unsigned short rta_type; 133 }; 134 135 /* Macros to handle rtattributes */ 136 137 #define RTA_ALIGNTO 4 138 #define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) ) 139 #define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \ 140 (rta)->rta_len >= sizeof(struct rtattr) && \ 141 (rta)->rta_len <= (len)) 142 #define RTA_NEXT(rta,attrlen) ((attrlen) -= RTA_ALIGN((rta)->rta_len), \ 143 (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len))) 144 #define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len)) 145 #define RTA_SPACE(len) RTA_ALIGN(RTA_LENGTH(len)) 146 #define RTA_DATA(rta) ((void*)(((char*)(rta)) + RTA_LENGTH(0))) 147 #define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0)) 148 149 150 151 152 /****************************************************************************** 153 * Definitions used in routing table administration. 154 ****/ 155 156 struct rtmsg 157 { 158 unsigned char rtm_family; 159 unsigned char rtm_dst_len; 160 unsigned char rtm_src_len; 161 unsigned char rtm_tos; 162 163 unsigned char rtm_table; /* Routing table id */ 164 unsigned char rtm_protocol; /* Routing protocol; see below */ 165 unsigned char rtm_scope; /* See below */ 166 unsigned char rtm_type; /* See below */ 167 168 unsigned rtm_flags; 169 }; 170 171 /* rtm_type */ 172 173 enum 174 { 175 RTN_UNSPEC, 176 RTN_UNICAST, /* Gateway or direct route */ 177 RTN_LOCAL, /* Accept locally */ 178 RTN_BROADCAST, /* Accept locally as broadcast, 179 send as broadcast */ 180 RTN_ANYCAST, /* Accept locally as broadcast, 181 but send as unicast */ 182 RTN_MULTICAST, /* Multicast route */ 183 RTN_BLACKHOLE, /* Drop */ 184 RTN_UNREACHABLE, /* Destination is unreachable */ 185 RTN_PROHIBIT, /* Administratively prohibited */ 186 RTN_THROW, /* Not in this table */ 187 RTN_NAT, /* Translate this address */ 188 RTN_XRESOLVE, /* Use external resolver */ 189 __RTN_MAX 190 }; 191 192 #define RTN_MAX (__RTN_MAX - 1) 193 194 195 /* rtm_protocol */ 196 197 #define RTPROT_UNSPEC 0 198 #define RTPROT_REDIRECT 1 /* Route installed by ICMP redirects; 199 not used by current IPv4 */ 200 #define RTPROT_KERNEL 2 /* Route installed by kernel */ 201 #define RTPROT_BOOT 3 /* Route installed during boot */ 202 #define RTPROT_STATIC 4 /* Route installed by administrator */ 203 204 /* Values of protocol >= RTPROT_STATIC are not interpreted by kernel; 205 they are just passed from user and back as is. 206 It will be used by hypothetical multiple routing daemons. 207 Note that protocol values should be standardized in order to 208 avoid conflicts. 209 */ 210 211 #define RTPROT_GATED 8 /* Apparently, GateD */ 212 #define RTPROT_RA 9 /* RDISC/ND router advertisements */ 213 #define RTPROT_MRT 10 /* Merit MRT */ 214 #define RTPROT_ZEBRA 11 /* Zebra */ 215 #define RTPROT_BIRD 12 /* BIRD */ 216 #define RTPROT_DNROUTED 13 /* DECnet routing daemon */ 217 #define RTPROT_XORP 14 /* XORP */ 218 #define RTPROT_NTK 15 /* Netsukuku */ 219 220 /* rtm_scope 221 222 Really it is not scope, but sort of distance to the destination. 223 NOWHERE are reserved for not existing destinations, HOST is our 224 local addresses, LINK are destinations, located on directly attached 225 link and UNIVERSE is everywhere in the Universe. 226 227 Intermediate values are also possible f.e. interior routes 228 could be assigned a value between UNIVERSE and LINK. 229 */ 230 231 enum rt_scope_t 232 { 233 RT_SCOPE_UNIVERSE=0, 234 /* User defined values */ 235 RT_SCOPE_SITE=200, 236 RT_SCOPE_LINK=253, 237 RT_SCOPE_HOST=254, 238 RT_SCOPE_NOWHERE=255 239 }; 240 241 /* rtm_flags */ 242 243 #define RTM_F_NOTIFY 0x100 /* Notify user of route change */ 244 #define RTM_F_CLONED 0x200 /* This route is cloned */ 245 #define RTM_F_EQUALIZE 0x400 /* Multipath equalizer: NI */ 246 #define RTM_F_PREFIX 0x800 /* Prefix addresses */ 247 248 /* Reserved table identifiers */ 249 250 enum rt_class_t 251 { 252 RT_TABLE_UNSPEC=0, 253 /* User defined values */ 254 RT_TABLE_COMPAT=252, 255 RT_TABLE_DEFAULT=253, 256 RT_TABLE_MAIN=254, 257 RT_TABLE_LOCAL=255, 258 RT_TABLE_MAX=0xFFFFFFFF 259 }; 260 261 262 /* Routing message attributes */ 263 264 enum rtattr_type_t 265 { 266 RTA_UNSPEC, 267 RTA_DST, 268 RTA_SRC, 269 RTA_IIF, 270 RTA_OIF, 271 RTA_GATEWAY, 272 RTA_PRIORITY, 273 RTA_PREFSRC, 274 RTA_METRICS, 275 RTA_MULTIPATH, 276 RTA_PROTOINFO, /* no longer used */ 277 RTA_FLOW, 278 RTA_CACHEINFO, 279 RTA_SESSION, /* no longer used */ 280 RTA_MP_ALGO, /* no longer used */ 281 RTA_TABLE, 282 __RTA_MAX 283 }; 284 285 #define RTA_MAX (__RTA_MAX - 1) 286 287 #define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg)))) 288 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg)) 289 290 /* RTM_MULTIPATH --- array of struct rtnexthop. 291 * 292 * "struct rtnexthop" describes all necessary nexthop information, 293 * i.e. parameters of path to a destination via this nexthop. 294 * 295 * At the moment it is impossible to set different prefsrc, mtu, window 296 * and rtt for different paths from multipath. 297 */ 298 299 struct rtnexthop 300 { 301 unsigned short rtnh_len; 302 unsigned char rtnh_flags; 303 unsigned char rtnh_hops; 304 int rtnh_ifindex; 305 }; 306 307 /* rtnh_flags */ 308 309 #define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */ 310 #define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */ 311 #define RTNH_F_ONLINK 4 /* Gateway is forced on link */ 312 313 /* Macros to handle hexthops */ 314 315 #define RTNH_ALIGNTO 4 316 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) ) 317 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \ 318 ((int)(rtnh)->rtnh_len) <= (len)) 319 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len))) 320 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len)) 321 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len)) 322 #define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0))) 323 324 /* RTM_CACHEINFO */ 325 326 struct rta_cacheinfo 327 { 328 __u32 rta_clntref; 329 __u32 rta_lastuse; 330 __s32 rta_expires; 331 __u32 rta_error; 332 __u32 rta_used; 333 334 #define RTNETLINK_HAVE_PEERINFO 1 335 __u32 rta_id; 336 __u32 rta_ts; 337 __u32 rta_tsage; 338 }; 339 340 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */ 341 342 enum 343 { 344 RTAX_UNSPEC, 345 #define RTAX_UNSPEC RTAX_UNSPEC 346 RTAX_LOCK, 347 #define RTAX_LOCK RTAX_LOCK 348 RTAX_MTU, 349 #define RTAX_MTU RTAX_MTU 350 RTAX_WINDOW, 351 #define RTAX_WINDOW RTAX_WINDOW 352 RTAX_RTT, 353 #define RTAX_RTT RTAX_RTT 354 RTAX_RTTVAR, 355 #define RTAX_RTTVAR RTAX_RTTVAR 356 RTAX_SSTHRESH, 357 #define RTAX_SSTHRESH RTAX_SSTHRESH 358 RTAX_CWND, 359 #define RTAX_CWND RTAX_CWND 360 RTAX_ADVMSS, 361 #define RTAX_ADVMSS RTAX_ADVMSS 362 RTAX_REORDERING, 363 #define RTAX_REORDERING RTAX_REORDERING 364 RTAX_HOPLIMIT, 365 #define RTAX_HOPLIMIT RTAX_HOPLIMIT 366 RTAX_INITCWND, 367 #define RTAX_INITCWND RTAX_INITCWND 368 RTAX_FEATURES, 369 #define RTAX_FEATURES RTAX_FEATURES 370 RTAX_RTO_MIN, 371 #define RTAX_RTO_MIN RTAX_RTO_MIN 372 __RTAX_MAX 373 }; 374 375 #define RTAX_MAX (__RTAX_MAX - 1) 376 377 #define RTAX_FEATURE_ECN 0x00000001 378 #define RTAX_FEATURE_SACK 0x00000002 379 #define RTAX_FEATURE_TIMESTAMP 0x00000004 380 #define RTAX_FEATURE_ALLFRAG 0x00000008 381 382 struct rta_session 383 { 384 __u8 proto; 385 __u8 pad1; 386 __u16 pad2; 387 388 union { 389 struct { 390 __u16 sport; 391 __u16 dport; 392 } ports; 393 394 struct { 395 __u8 type; 396 __u8 code; 397 __u16 ident; 398 } icmpt; 399 400 __u32 spi; 401 } u; 402 }; 403 404 /**** 405 * General form of address family dependent message. 406 ****/ 407 408 struct rtgenmsg 409 { 410 unsigned char rtgen_family; 411 }; 412 413 /***************************************************************** 414 * Link layer specific messages. 415 ****/ 416 417 /* struct ifinfomsg 418 * passes link level specific information, not dependent 419 * on network protocol. 420 */ 421 422 struct ifinfomsg 423 { 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 ****/ 435 436 struct prefixmsg 437 { 438 unsigned char prefix_family; 439 unsigned char prefix_pad1; 440 unsigned short prefix_pad2; 441 int prefix_ifindex; 442 unsigned char prefix_type; 443 unsigned char prefix_len; 444 unsigned char prefix_flags; 445 unsigned char prefix_pad3; 446 }; 447 448 enum 449 { 450 PREFIX_UNSPEC, 451 PREFIX_ADDRESS, 452 PREFIX_CACHEINFO, 453 __PREFIX_MAX 454 }; 455 456 #define PREFIX_MAX (__PREFIX_MAX - 1) 457 458 struct prefix_cacheinfo 459 { 460 __u32 preferred_time; 461 __u32 valid_time; 462 }; 463 464 465 /***************************************************************** 466 * Traffic control messages. 467 ****/ 468 469 struct tcmsg 470 { 471 unsigned char tcm_family; 472 unsigned char tcm__pad1; 473 unsigned short tcm__pad2; 474 int tcm_ifindex; 475 __u32 tcm_handle; 476 __u32 tcm_parent; 477 __u32 tcm_info; 478 }; 479 480 enum 481 { 482 TCA_UNSPEC, 483 TCA_KIND, 484 TCA_OPTIONS, 485 TCA_STATS, 486 TCA_XSTATS, 487 TCA_RATE, 488 TCA_FCNT, 489 TCA_STATS2, 490 TCA_STAB, 491 __TCA_MAX 492 }; 493 494 #define TCA_MAX (__TCA_MAX - 1) 495 496 #define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg)))) 497 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg)) 498 499 /******************************************************************** 500 * Neighbor Discovery userland options 501 ****/ 502 503 struct nduseroptmsg 504 { 505 unsigned char nduseropt_family; 506 unsigned char nduseropt_pad1; 507 unsigned short nduseropt_opts_len; /* Total length of options */ 508 int nduseropt_ifindex; 509 __u8 nduseropt_icmp_type; 510 __u8 nduseropt_icmp_code; 511 unsigned short nduseropt_pad2; 512 unsigned int nduseropt_pad3; 513 /* Followed by one or more ND options */ 514 }; 515 516 enum 517 { 518 NDUSEROPT_UNSPEC, 519 NDUSEROPT_SRCADDR, 520 __NDUSEROPT_MAX 521 }; 522 523 #define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1) 524 525 #ifndef __KERNEL__ 526 /* RTnetlink multicast groups - backwards compatibility for userspace */ 527 #define RTMGRP_LINK 1 528 #define RTMGRP_NOTIFY 2 529 #define RTMGRP_NEIGH 4 530 #define RTMGRP_TC 8 531 532 #define RTMGRP_IPV4_IFADDR 0x10 533 #define RTMGRP_IPV4_MROUTE 0x20 534 #define RTMGRP_IPV4_ROUTE 0x40 535 #define RTMGRP_IPV4_RULE 0x80 536 537 #define RTMGRP_IPV6_IFADDR 0x100 538 #define RTMGRP_IPV6_MROUTE 0x200 539 #define RTMGRP_IPV6_ROUTE 0x400 540 #define RTMGRP_IPV6_IFINFO 0x800 541 542 #define RTMGRP_DECnet_IFADDR 0x1000 543 #define RTMGRP_DECnet_ROUTE 0x4000 544 545 #define RTMGRP_IPV6_PREFIX 0x20000 546 #endif 547 548 /* RTnetlink multicast groups */ 549 enum rtnetlink_groups { 550 RTNLGRP_NONE, 551 #define RTNLGRP_NONE RTNLGRP_NONE 552 RTNLGRP_LINK, 553 #define RTNLGRP_LINK RTNLGRP_LINK 554 RTNLGRP_NOTIFY, 555 #define RTNLGRP_NOTIFY RTNLGRP_NOTIFY 556 RTNLGRP_NEIGH, 557 #define RTNLGRP_NEIGH RTNLGRP_NEIGH 558 RTNLGRP_TC, 559 #define RTNLGRP_TC RTNLGRP_TC 560 RTNLGRP_IPV4_IFADDR, 561 #define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR 562 RTNLGRP_IPV4_MROUTE, 563 #define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE 564 RTNLGRP_IPV4_ROUTE, 565 #define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE 566 RTNLGRP_IPV4_RULE, 567 #define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE 568 RTNLGRP_IPV6_IFADDR, 569 #define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR 570 RTNLGRP_IPV6_MROUTE, 571 #define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE 572 RTNLGRP_IPV6_ROUTE, 573 #define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE 574 RTNLGRP_IPV6_IFINFO, 575 #define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO 576 RTNLGRP_DECnet_IFADDR, 577 #define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR 578 RTNLGRP_NOP2, 579 RTNLGRP_DECnet_ROUTE, 580 #define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE 581 RTNLGRP_DECnet_RULE, 582 #define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE 583 RTNLGRP_NOP4, 584 RTNLGRP_IPV6_PREFIX, 585 #define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX 586 RTNLGRP_IPV6_RULE, 587 #define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE 588 RTNLGRP_ND_USEROPT, 589 #define RTNLGRP_ND_USEROPT RTNLGRP_ND_USEROPT 590 RTNLGRP_PHONET_IFADDR, 591 #define RTNLGRP_PHONET_IFADDR RTNLGRP_PHONET_IFADDR 592 RTNLGRP_PHONET_ROUTE, 593 #define RTNLGRP_PHONET_ROUTE RTNLGRP_PHONET_ROUTE 594 __RTNLGRP_MAX 595 }; 596 #define RTNLGRP_MAX (__RTNLGRP_MAX - 1) 597 598 /* TC action piece */ 599 struct tcamsg 600 { 601 unsigned char tca_family; 602 unsigned char tca__pad1; 603 unsigned short tca__pad2; 604 }; 605 #define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg)))) 606 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg)) 607 #define TCA_ACT_TAB 1 /* attr type must be >=1 */ 608 #define TCAA_MAX 1 609 610 /* End of information exported to user level */ 611 612 #ifdef __KERNEL__ 613 614 #include <linux/mutex.h> 615 616 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str) 617 { 618 int len = strlen(str) + 1; 619 return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len); 620 } 621 622 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo); 623 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid); 624 extern int rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 625 struct nlmsghdr *nlh, gfp_t flags); 626 extern void rtnl_set_sk_err(struct net *net, u32 group, int error); 627 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics); 628 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, 629 u32 id, u32 ts, u32 tsage, long expires, 630 u32 error); 631 632 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data); 633 634 #define RTA_PUT(skb, attrtype, attrlen, data) \ 635 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \ 636 goto rtattr_failure; \ 637 __rta_fill(skb, attrtype, attrlen, data); }) 638 639 #define RTA_APPEND(skb, attrlen, data) \ 640 ({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \ 641 goto rtattr_failure; \ 642 memcpy(skb_put(skb, attrlen), data, attrlen); }) 643 644 #define RTA_PUT_NOHDR(skb, attrlen, data) \ 645 ({ RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \ 646 memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \ 647 RTA_ALIGN(attrlen) - attrlen); }) 648 649 #define RTA_PUT_U8(skb, attrtype, value) \ 650 ({ u8 _tmp = (value); \ 651 RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); }) 652 653 #define RTA_PUT_U16(skb, attrtype, value) \ 654 ({ u16 _tmp = (value); \ 655 RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); }) 656 657 #define RTA_PUT_U32(skb, attrtype, value) \ 658 ({ u32 _tmp = (value); \ 659 RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); }) 660 661 #define RTA_PUT_U64(skb, attrtype, value) \ 662 ({ u64 _tmp = (value); \ 663 RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); }) 664 665 #define RTA_PUT_SECS(skb, attrtype, value) \ 666 RTA_PUT_U64(skb, attrtype, (value) / HZ) 667 668 #define RTA_PUT_MSECS(skb, attrtype, value) \ 669 RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value)) 670 671 #define RTA_PUT_STRING(skb, attrtype, value) \ 672 RTA_PUT(skb, attrtype, strlen(value) + 1, value) 673 674 #define RTA_PUT_FLAG(skb, attrtype) \ 675 RTA_PUT(skb, attrtype, 0, NULL); 676 677 #define RTA_NEST(skb, type) \ 678 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \ 679 RTA_PUT(skb, type, 0, NULL); \ 680 __start; }) 681 682 #define RTA_NEST_END(skb, start) \ 683 ({ (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ 684 (skb)->len; }) 685 686 #define RTA_NEST_COMPAT(skb, type, attrlen, data) \ 687 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \ 688 RTA_PUT(skb, type, attrlen, data); \ 689 RTA_NEST(skb, type); \ 690 __start; }) 691 692 #define RTA_NEST_COMPAT_END(skb, start) \ 693 ({ struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \ 694 (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ 695 RTA_NEST_END(skb, __nest); \ 696 (skb)->len; }) 697 698 #define RTA_NEST_CANCEL(skb, start) \ 699 ({ if (start) \ 700 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \ 701 -1; }) 702 703 #define RTA_GET_U8(rta) \ 704 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \ 705 goto rtattr_failure; \ 706 *(u8 *) RTA_DATA(rta); }) 707 708 #define RTA_GET_U16(rta) \ 709 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \ 710 goto rtattr_failure; \ 711 *(u16 *) RTA_DATA(rta); }) 712 713 #define RTA_GET_U32(rta) \ 714 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \ 715 goto rtattr_failure; \ 716 *(u32 *) RTA_DATA(rta); }) 717 718 #define RTA_GET_U64(rta) \ 719 ({ u64 _tmp; \ 720 if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \ 721 goto rtattr_failure; \ 722 memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \ 723 _tmp; }) 724 725 #define RTA_GET_FLAG(rta) (!!(rta)) 726 727 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ) 728 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta))) 729 730 static inline struct rtattr * 731 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen) 732 { 733 struct rtattr *rta; 734 int size = RTA_LENGTH(attrlen); 735 736 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size)); 737 rta->rta_type = attrtype; 738 rta->rta_len = size; 739 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size); 740 return rta; 741 } 742 743 #define __RTA_PUT(skb, attrtype, attrlen) \ 744 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \ 745 goto rtattr_failure; \ 746 __rta_reserve(skb, attrtype, attrlen); }) 747 748 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change); 749 750 /* RTNL is used as a global lock for all changes to network configuration */ 751 extern void rtnl_lock(void); 752 extern void rtnl_unlock(void); 753 extern int rtnl_trylock(void); 754 extern int rtnl_is_locked(void); 755 756 extern void rtnetlink_init(void); 757 extern void __rtnl_unlock(void); 758 759 #define ASSERT_RTNL() do { \ 760 if (unlikely(!rtnl_is_locked())) { \ 761 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \ 762 __FILE__, __LINE__); \ 763 dump_stack(); \ 764 } \ 765 } while(0) 766 767 static inline u32 rtm_get_table(struct rtattr **rta, u8 table) 768 { 769 return RTA_GET_U32(rta[RTA_TABLE-1]); 770 rtattr_failure: 771 return table; 772 } 773 774 #endif /* __KERNEL__ */ 775 776 777 #endif /* __LINUX_RTNETLINK_H */ 778