1 #ifndef __LINUX_RTNETLINK_H 2 #define __LINUX_RTNETLINK_H 3 4 #include <linux/types.h> 5 #include <linux/netlink.h> 6 #include <linux/if_link.h> 7 #include <linux/if_addr.h> 8 #include <linux/neighbour.h> 9 10 /**** 11 * Routing/neighbour discovery messages. 12 ****/ 13 14 /* Types of messages */ 15 16 enum { 17 RTM_BASE = 16, 18 #define RTM_BASE RTM_BASE 19 20 RTM_NEWLINK = 16, 21 #define RTM_NEWLINK RTM_NEWLINK 22 RTM_DELLINK, 23 #define RTM_DELLINK RTM_DELLINK 24 RTM_GETLINK, 25 #define RTM_GETLINK RTM_GETLINK 26 RTM_SETLINK, 27 #define RTM_SETLINK RTM_SETLINK 28 29 RTM_NEWADDR = 20, 30 #define RTM_NEWADDR RTM_NEWADDR 31 RTM_DELADDR, 32 #define RTM_DELADDR RTM_DELADDR 33 RTM_GETADDR, 34 #define RTM_GETADDR RTM_GETADDR 35 36 RTM_NEWROUTE = 24, 37 #define RTM_NEWROUTE RTM_NEWROUTE 38 RTM_DELROUTE, 39 #define RTM_DELROUTE RTM_DELROUTE 40 RTM_GETROUTE, 41 #define RTM_GETROUTE RTM_GETROUTE 42 43 RTM_NEWNEIGH = 28, 44 #define RTM_NEWNEIGH RTM_NEWNEIGH 45 RTM_DELNEIGH, 46 #define RTM_DELNEIGH RTM_DELNEIGH 47 RTM_GETNEIGH, 48 #define RTM_GETNEIGH RTM_GETNEIGH 49 50 RTM_NEWRULE = 32, 51 #define RTM_NEWRULE RTM_NEWRULE 52 RTM_DELRULE, 53 #define RTM_DELRULE RTM_DELRULE 54 RTM_GETRULE, 55 #define RTM_GETRULE RTM_GETRULE 56 57 RTM_NEWQDISC = 36, 58 #define RTM_NEWQDISC RTM_NEWQDISC 59 RTM_DELQDISC, 60 #define RTM_DELQDISC RTM_DELQDISC 61 RTM_GETQDISC, 62 #define RTM_GETQDISC RTM_GETQDISC 63 64 RTM_NEWTCLASS = 40, 65 #define RTM_NEWTCLASS RTM_NEWTCLASS 66 RTM_DELTCLASS, 67 #define RTM_DELTCLASS RTM_DELTCLASS 68 RTM_GETTCLASS, 69 #define RTM_GETTCLASS RTM_GETTCLASS 70 71 RTM_NEWTFILTER = 44, 72 #define RTM_NEWTFILTER RTM_NEWTFILTER 73 RTM_DELTFILTER, 74 #define RTM_DELTFILTER RTM_DELTFILTER 75 RTM_GETTFILTER, 76 #define RTM_GETTFILTER RTM_GETTFILTER 77 78 RTM_NEWACTION = 48, 79 #define RTM_NEWACTION RTM_NEWACTION 80 RTM_DELACTION, 81 #define RTM_DELACTION RTM_DELACTION 82 RTM_GETACTION, 83 #define RTM_GETACTION RTM_GETACTION 84 85 RTM_NEWPREFIX = 52, 86 #define RTM_NEWPREFIX RTM_NEWPREFIX 87 88 RTM_GETMULTICAST = 58, 89 #define RTM_GETMULTICAST RTM_GETMULTICAST 90 91 RTM_GETANYCAST = 62, 92 #define RTM_GETANYCAST RTM_GETANYCAST 93 94 RTM_NEWNEIGHTBL = 64, 95 #define RTM_NEWNEIGHTBL RTM_NEWNEIGHTBL 96 RTM_GETNEIGHTBL = 66, 97 #define RTM_GETNEIGHTBL RTM_GETNEIGHTBL 98 RTM_SETNEIGHTBL, 99 #define RTM_SETNEIGHTBL RTM_SETNEIGHTBL 100 101 RTM_NEWNDUSEROPT = 68, 102 #define RTM_NEWNDUSEROPT RTM_NEWNDUSEROPT 103 104 RTM_NEWADDRLABEL = 72, 105 #define RTM_NEWADDRLABEL RTM_NEWADDRLABEL 106 RTM_DELADDRLABEL, 107 #define RTM_NEWADDRLABEL RTM_NEWADDRLABEL 108 RTM_GETADDRLABEL, 109 #define RTM_GETADDRLABEL RTM_GETADDRLABEL 110 111 RTM_GETDCB = 78, 112 #define RTM_GETDCB RTM_GETDCB 113 RTM_SETDCB, 114 #define RTM_SETDCB RTM_SETDCB 115 116 __RTM_MAX, 117 #define RTM_MAX (((__RTM_MAX + 3) & ~3) - 1) 118 }; 119 120 #define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE) 121 #define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2) 122 #define RTM_FAM(cmd) (((cmd) - RTM_BASE) >> 2) 123 124 /* 125 Generic structure for encapsulation of optional route information. 126 It is reminiscent of sockaddr, but with sa_family replaced 127 with attribute type. 128 */ 129 130 struct rtattr 131 { 132 unsigned short rta_len; 133 unsigned short rta_type; 134 }; 135 136 /* Macros to handle rtattributes */ 137 138 #define RTA_ALIGNTO 4 139 #define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) ) 140 #define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \ 141 (rta)->rta_len >= sizeof(struct rtattr) && \ 142 (rta)->rta_len <= (len)) 143 #define RTA_NEXT(rta,attrlen) ((attrlen) -= RTA_ALIGN((rta)->rta_len), \ 144 (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len))) 145 #define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len)) 146 #define RTA_SPACE(len) RTA_ALIGN(RTA_LENGTH(len)) 147 #define RTA_DATA(rta) ((void*)(((char*)(rta)) + RTA_LENGTH(0))) 148 #define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0)) 149 150 151 152 153 /****************************************************************************** 154 * Definitions used in routing table administration. 155 ****/ 156 157 struct rtmsg 158 { 159 unsigned char rtm_family; 160 unsigned char rtm_dst_len; 161 unsigned char rtm_src_len; 162 unsigned char rtm_tos; 163 164 unsigned char rtm_table; /* Routing table id */ 165 unsigned char rtm_protocol; /* Routing protocol; see below */ 166 unsigned char rtm_scope; /* See below */ 167 unsigned char rtm_type; /* See below */ 168 169 unsigned rtm_flags; 170 }; 171 172 /* rtm_type */ 173 174 enum 175 { 176 RTN_UNSPEC, 177 RTN_UNICAST, /* Gateway or direct route */ 178 RTN_LOCAL, /* Accept locally */ 179 RTN_BROADCAST, /* Accept locally as broadcast, 180 send as broadcast */ 181 RTN_ANYCAST, /* Accept locally as broadcast, 182 but send as unicast */ 183 RTN_MULTICAST, /* Multicast route */ 184 RTN_BLACKHOLE, /* Drop */ 185 RTN_UNREACHABLE, /* Destination is unreachable */ 186 RTN_PROHIBIT, /* Administratively prohibited */ 187 RTN_THROW, /* Not in this table */ 188 RTN_NAT, /* Translate this address */ 189 RTN_XRESOLVE, /* Use external resolver */ 190 __RTN_MAX 191 }; 192 193 #define RTN_MAX (__RTN_MAX - 1) 194 195 196 /* rtm_protocol */ 197 198 #define RTPROT_UNSPEC 0 199 #define RTPROT_REDIRECT 1 /* Route installed by ICMP redirects; 200 not used by current IPv4 */ 201 #define RTPROT_KERNEL 2 /* Route installed by kernel */ 202 #define RTPROT_BOOT 3 /* Route installed during boot */ 203 #define RTPROT_STATIC 4 /* Route installed by administrator */ 204 205 /* Values of protocol >= RTPROT_STATIC are not interpreted by kernel; 206 they are just passed from user and back as is. 207 It will be used by hypothetical multiple routing daemons. 208 Note that protocol values should be standardized in order to 209 avoid conflicts. 210 */ 211 212 #define RTPROT_GATED 8 /* Apparently, GateD */ 213 #define RTPROT_RA 9 /* RDISC/ND router advertisements */ 214 #define RTPROT_MRT 10 /* Merit MRT */ 215 #define RTPROT_ZEBRA 11 /* Zebra */ 216 #define RTPROT_BIRD 12 /* BIRD */ 217 #define RTPROT_DNROUTED 13 /* DECnet routing daemon */ 218 #define RTPROT_XORP 14 /* XORP */ 219 #define RTPROT_NTK 15 /* Netsukuku */ 220 #define RTPROT_DHCP 16 /* DHCP client */ 221 222 /* rtm_scope 223 224 Really it is not scope, but sort of distance to the destination. 225 NOWHERE are reserved for not existing destinations, HOST is our 226 local addresses, LINK are destinations, located on directly attached 227 link and UNIVERSE is everywhere in the Universe. 228 229 Intermediate values are also possible f.e. interior routes 230 could be assigned a value between UNIVERSE and LINK. 231 */ 232 233 enum rt_scope_t 234 { 235 RT_SCOPE_UNIVERSE=0, 236 /* User defined values */ 237 RT_SCOPE_SITE=200, 238 RT_SCOPE_LINK=253, 239 RT_SCOPE_HOST=254, 240 RT_SCOPE_NOWHERE=255 241 }; 242 243 /* rtm_flags */ 244 245 #define RTM_F_NOTIFY 0x100 /* Notify user of route change */ 246 #define RTM_F_CLONED 0x200 /* This route is cloned */ 247 #define RTM_F_EQUALIZE 0x400 /* Multipath equalizer: NI */ 248 #define RTM_F_PREFIX 0x800 /* Prefix addresses */ 249 250 /* Reserved table identifiers */ 251 252 enum rt_class_t 253 { 254 RT_TABLE_UNSPEC=0, 255 /* User defined values */ 256 RT_TABLE_COMPAT=252, 257 RT_TABLE_DEFAULT=253, 258 RT_TABLE_MAIN=254, 259 RT_TABLE_LOCAL=255, 260 RT_TABLE_MAX=0xFFFFFFFF 261 }; 262 263 264 /* Routing message attributes */ 265 266 enum rtattr_type_t 267 { 268 RTA_UNSPEC, 269 RTA_DST, 270 RTA_SRC, 271 RTA_IIF, 272 RTA_OIF, 273 RTA_GATEWAY, 274 RTA_PRIORITY, 275 RTA_PREFSRC, 276 RTA_METRICS, 277 RTA_MULTIPATH, 278 RTA_PROTOINFO, /* no longer used */ 279 RTA_FLOW, 280 RTA_CACHEINFO, 281 RTA_SESSION, /* no longer used */ 282 RTA_MP_ALGO, /* no longer used */ 283 RTA_TABLE, 284 __RTA_MAX 285 }; 286 287 #define RTA_MAX (__RTA_MAX - 1) 288 289 #define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg)))) 290 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg)) 291 292 /* RTM_MULTIPATH --- array of struct rtnexthop. 293 * 294 * "struct rtnexthop" describes all necessary nexthop information, 295 * i.e. parameters of path to a destination via this nexthop. 296 * 297 * At the moment it is impossible to set different prefsrc, mtu, window 298 * and rtt for different paths from multipath. 299 */ 300 301 struct rtnexthop 302 { 303 unsigned short rtnh_len; 304 unsigned char rtnh_flags; 305 unsigned char rtnh_hops; 306 int rtnh_ifindex; 307 }; 308 309 /* rtnh_flags */ 310 311 #define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */ 312 #define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */ 313 #define RTNH_F_ONLINK 4 /* Gateway is forced on link */ 314 315 /* Macros to handle hexthops */ 316 317 #define RTNH_ALIGNTO 4 318 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) ) 319 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \ 320 ((int)(rtnh)->rtnh_len) <= (len)) 321 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len))) 322 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len)) 323 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len)) 324 #define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0))) 325 326 /* RTM_CACHEINFO */ 327 328 struct rta_cacheinfo 329 { 330 __u32 rta_clntref; 331 __u32 rta_lastuse; 332 __s32 rta_expires; 333 __u32 rta_error; 334 __u32 rta_used; 335 336 #define RTNETLINK_HAVE_PEERINFO 1 337 __u32 rta_id; 338 __u32 rta_ts; 339 __u32 rta_tsage; 340 }; 341 342 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */ 343 344 enum 345 { 346 RTAX_UNSPEC, 347 #define RTAX_UNSPEC RTAX_UNSPEC 348 RTAX_LOCK, 349 #define RTAX_LOCK RTAX_LOCK 350 RTAX_MTU, 351 #define RTAX_MTU RTAX_MTU 352 RTAX_WINDOW, 353 #define RTAX_WINDOW RTAX_WINDOW 354 RTAX_RTT, 355 #define RTAX_RTT RTAX_RTT 356 RTAX_RTTVAR, 357 #define RTAX_RTTVAR RTAX_RTTVAR 358 RTAX_SSTHRESH, 359 #define RTAX_SSTHRESH RTAX_SSTHRESH 360 RTAX_CWND, 361 #define RTAX_CWND RTAX_CWND 362 RTAX_ADVMSS, 363 #define RTAX_ADVMSS RTAX_ADVMSS 364 RTAX_REORDERING, 365 #define RTAX_REORDERING RTAX_REORDERING 366 RTAX_HOPLIMIT, 367 #define RTAX_HOPLIMIT RTAX_HOPLIMIT 368 RTAX_INITCWND, 369 #define RTAX_INITCWND RTAX_INITCWND 370 RTAX_FEATURES, 371 #define RTAX_FEATURES RTAX_FEATURES 372 RTAX_RTO_MIN, 373 #define RTAX_RTO_MIN RTAX_RTO_MIN 374 __RTAX_MAX 375 }; 376 377 #define RTAX_MAX (__RTAX_MAX - 1) 378 379 #define RTAX_FEATURE_ECN 0x00000001 380 #define RTAX_FEATURE_SACK 0x00000002 381 #define RTAX_FEATURE_TIMESTAMP 0x00000004 382 #define RTAX_FEATURE_ALLFRAG 0x00000008 383 384 struct rta_session 385 { 386 __u8 proto; 387 __u8 pad1; 388 __u16 pad2; 389 390 union { 391 struct { 392 __u16 sport; 393 __u16 dport; 394 } ports; 395 396 struct { 397 __u8 type; 398 __u8 code; 399 __u16 ident; 400 } icmpt; 401 402 __u32 spi; 403 } u; 404 }; 405 406 /**** 407 * General form of address family dependent message. 408 ****/ 409 410 struct rtgenmsg 411 { 412 unsigned char rtgen_family; 413 }; 414 415 /***************************************************************** 416 * Link layer specific messages. 417 ****/ 418 419 /* struct ifinfomsg 420 * passes link level specific information, not dependent 421 * on network protocol. 422 */ 423 424 struct ifinfomsg 425 { 426 unsigned char ifi_family; 427 unsigned char __ifi_pad; 428 unsigned short ifi_type; /* ARPHRD_* */ 429 int ifi_index; /* Link index */ 430 unsigned ifi_flags; /* IFF_* flags */ 431 unsigned ifi_change; /* IFF_* change mask */ 432 }; 433 434 /******************************************************************** 435 * prefix information 436 ****/ 437 438 struct prefixmsg 439 { 440 unsigned char prefix_family; 441 unsigned char prefix_pad1; 442 unsigned short prefix_pad2; 443 int prefix_ifindex; 444 unsigned char prefix_type; 445 unsigned char prefix_len; 446 unsigned char prefix_flags; 447 unsigned char prefix_pad3; 448 }; 449 450 enum 451 { 452 PREFIX_UNSPEC, 453 PREFIX_ADDRESS, 454 PREFIX_CACHEINFO, 455 __PREFIX_MAX 456 }; 457 458 #define PREFIX_MAX (__PREFIX_MAX - 1) 459 460 struct prefix_cacheinfo 461 { 462 __u32 preferred_time; 463 __u32 valid_time; 464 }; 465 466 467 /***************************************************************** 468 * Traffic control messages. 469 ****/ 470 471 struct tcmsg 472 { 473 unsigned char tcm_family; 474 unsigned char tcm__pad1; 475 unsigned short tcm__pad2; 476 int tcm_ifindex; 477 __u32 tcm_handle; 478 __u32 tcm_parent; 479 __u32 tcm_info; 480 }; 481 482 enum 483 { 484 TCA_UNSPEC, 485 TCA_KIND, 486 TCA_OPTIONS, 487 TCA_STATS, 488 TCA_XSTATS, 489 TCA_RATE, 490 TCA_FCNT, 491 TCA_STATS2, 492 TCA_STAB, 493 __TCA_MAX 494 }; 495 496 #define TCA_MAX (__TCA_MAX - 1) 497 498 #define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg)))) 499 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg)) 500 501 /******************************************************************** 502 * Neighbor Discovery userland options 503 ****/ 504 505 struct nduseroptmsg 506 { 507 unsigned char nduseropt_family; 508 unsigned char nduseropt_pad1; 509 unsigned short nduseropt_opts_len; /* Total length of options */ 510 int nduseropt_ifindex; 511 __u8 nduseropt_icmp_type; 512 __u8 nduseropt_icmp_code; 513 unsigned short nduseropt_pad2; 514 unsigned int nduseropt_pad3; 515 /* Followed by one or more ND options */ 516 }; 517 518 enum 519 { 520 NDUSEROPT_UNSPEC, 521 NDUSEROPT_SRCADDR, 522 __NDUSEROPT_MAX 523 }; 524 525 #define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1) 526 527 #ifndef __KERNEL__ 528 /* RTnetlink multicast groups - backwards compatibility for userspace */ 529 #define RTMGRP_LINK 1 530 #define RTMGRP_NOTIFY 2 531 #define RTMGRP_NEIGH 4 532 #define RTMGRP_TC 8 533 534 #define RTMGRP_IPV4_IFADDR 0x10 535 #define RTMGRP_IPV4_MROUTE 0x20 536 #define RTMGRP_IPV4_ROUTE 0x40 537 #define RTMGRP_IPV4_RULE 0x80 538 539 #define RTMGRP_IPV6_IFADDR 0x100 540 #define RTMGRP_IPV6_MROUTE 0x200 541 #define RTMGRP_IPV6_ROUTE 0x400 542 #define RTMGRP_IPV6_IFINFO 0x800 543 544 #define RTMGRP_DECnet_IFADDR 0x1000 545 #define RTMGRP_DECnet_ROUTE 0x4000 546 547 #define RTMGRP_IPV6_PREFIX 0x20000 548 #endif 549 550 /* RTnetlink multicast groups */ 551 enum rtnetlink_groups { 552 RTNLGRP_NONE, 553 #define RTNLGRP_NONE RTNLGRP_NONE 554 RTNLGRP_LINK, 555 #define RTNLGRP_LINK RTNLGRP_LINK 556 RTNLGRP_NOTIFY, 557 #define RTNLGRP_NOTIFY RTNLGRP_NOTIFY 558 RTNLGRP_NEIGH, 559 #define RTNLGRP_NEIGH RTNLGRP_NEIGH 560 RTNLGRP_TC, 561 #define RTNLGRP_TC RTNLGRP_TC 562 RTNLGRP_IPV4_IFADDR, 563 #define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR 564 RTNLGRP_IPV4_MROUTE, 565 #define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE 566 RTNLGRP_IPV4_ROUTE, 567 #define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE 568 RTNLGRP_IPV4_RULE, 569 #define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE 570 RTNLGRP_IPV6_IFADDR, 571 #define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR 572 RTNLGRP_IPV6_MROUTE, 573 #define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE 574 RTNLGRP_IPV6_ROUTE, 575 #define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE 576 RTNLGRP_IPV6_IFINFO, 577 #define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO 578 RTNLGRP_DECnet_IFADDR, 579 #define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR 580 RTNLGRP_NOP2, 581 RTNLGRP_DECnet_ROUTE, 582 #define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE 583 RTNLGRP_DECnet_RULE, 584 #define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE 585 RTNLGRP_NOP4, 586 RTNLGRP_IPV6_PREFIX, 587 #define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX 588 RTNLGRP_IPV6_RULE, 589 #define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE 590 RTNLGRP_ND_USEROPT, 591 #define RTNLGRP_ND_USEROPT RTNLGRP_ND_USEROPT 592 RTNLGRP_PHONET_IFADDR, 593 #define RTNLGRP_PHONET_IFADDR RTNLGRP_PHONET_IFADDR 594 RTNLGRP_PHONET_ROUTE, 595 #define RTNLGRP_PHONET_ROUTE RTNLGRP_PHONET_ROUTE 596 __RTNLGRP_MAX 597 }; 598 #define RTNLGRP_MAX (__RTNLGRP_MAX - 1) 599 600 /* TC action piece */ 601 struct tcamsg 602 { 603 unsigned char tca_family; 604 unsigned char tca__pad1; 605 unsigned short tca__pad2; 606 }; 607 #define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg)))) 608 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg)) 609 #define TCA_ACT_TAB 1 /* attr type must be >=1 */ 610 #define TCAA_MAX 1 611 612 /* End of information exported to user level */ 613 614 #ifdef __KERNEL__ 615 616 #include <linux/mutex.h> 617 618 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str) 619 { 620 int len = strlen(str) + 1; 621 return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len); 622 } 623 624 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo); 625 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid); 626 extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, 627 u32 group, struct nlmsghdr *nlh, gfp_t flags); 628 extern void rtnl_set_sk_err(struct net *net, u32 group, int error); 629 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics); 630 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, 631 u32 id, u32 ts, u32 tsage, long expires, 632 u32 error); 633 634 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data); 635 636 #define RTA_PUT(skb, attrtype, attrlen, data) \ 637 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \ 638 goto rtattr_failure; \ 639 __rta_fill(skb, attrtype, attrlen, data); }) 640 641 #define RTA_APPEND(skb, attrlen, data) \ 642 ({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \ 643 goto rtattr_failure; \ 644 memcpy(skb_put(skb, attrlen), data, attrlen); }) 645 646 #define RTA_PUT_NOHDR(skb, attrlen, data) \ 647 ({ RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \ 648 memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \ 649 RTA_ALIGN(attrlen) - attrlen); }) 650 651 #define RTA_PUT_U8(skb, attrtype, value) \ 652 ({ u8 _tmp = (value); \ 653 RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); }) 654 655 #define RTA_PUT_U16(skb, attrtype, value) \ 656 ({ u16 _tmp = (value); \ 657 RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); }) 658 659 #define RTA_PUT_U32(skb, attrtype, value) \ 660 ({ u32 _tmp = (value); \ 661 RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); }) 662 663 #define RTA_PUT_U64(skb, attrtype, value) \ 664 ({ u64 _tmp = (value); \ 665 RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); }) 666 667 #define RTA_PUT_SECS(skb, attrtype, value) \ 668 RTA_PUT_U64(skb, attrtype, (value) / HZ) 669 670 #define RTA_PUT_MSECS(skb, attrtype, value) \ 671 RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value)) 672 673 #define RTA_PUT_STRING(skb, attrtype, value) \ 674 RTA_PUT(skb, attrtype, strlen(value) + 1, value) 675 676 #define RTA_PUT_FLAG(skb, attrtype) \ 677 RTA_PUT(skb, attrtype, 0, NULL); 678 679 #define RTA_NEST(skb, type) \ 680 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \ 681 RTA_PUT(skb, type, 0, NULL); \ 682 __start; }) 683 684 #define RTA_NEST_END(skb, start) \ 685 ({ (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ 686 (skb)->len; }) 687 688 #define RTA_NEST_COMPAT(skb, type, attrlen, data) \ 689 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \ 690 RTA_PUT(skb, type, attrlen, data); \ 691 RTA_NEST(skb, type); \ 692 __start; }) 693 694 #define RTA_NEST_COMPAT_END(skb, start) \ 695 ({ struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \ 696 (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ 697 RTA_NEST_END(skb, __nest); \ 698 (skb)->len; }) 699 700 #define RTA_NEST_CANCEL(skb, start) \ 701 ({ if (start) \ 702 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \ 703 -1; }) 704 705 #define RTA_GET_U8(rta) \ 706 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \ 707 goto rtattr_failure; \ 708 *(u8 *) RTA_DATA(rta); }) 709 710 #define RTA_GET_U16(rta) \ 711 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \ 712 goto rtattr_failure; \ 713 *(u16 *) RTA_DATA(rta); }) 714 715 #define RTA_GET_U32(rta) \ 716 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \ 717 goto rtattr_failure; \ 718 *(u32 *) RTA_DATA(rta); }) 719 720 #define RTA_GET_U64(rta) \ 721 ({ u64 _tmp; \ 722 if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \ 723 goto rtattr_failure; \ 724 memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \ 725 _tmp; }) 726 727 #define RTA_GET_FLAG(rta) (!!(rta)) 728 729 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ) 730 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta))) 731 732 static inline struct rtattr * 733 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen) 734 { 735 struct rtattr *rta; 736 int size = RTA_LENGTH(attrlen); 737 738 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size)); 739 rta->rta_type = attrtype; 740 rta->rta_len = size; 741 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size); 742 return rta; 743 } 744 745 #define __RTA_PUT(skb, attrtype, attrlen) \ 746 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \ 747 goto rtattr_failure; \ 748 __rta_reserve(skb, attrtype, attrlen); }) 749 750 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change); 751 752 /* RTNL is used as a global lock for all changes to network configuration */ 753 extern void rtnl_lock(void); 754 extern void rtnl_unlock(void); 755 extern int rtnl_trylock(void); 756 extern int rtnl_is_locked(void); 757 758 extern void rtnetlink_init(void); 759 extern void __rtnl_unlock(void); 760 761 #define ASSERT_RTNL() do { \ 762 if (unlikely(!rtnl_is_locked())) { \ 763 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \ 764 __FILE__, __LINE__); \ 765 dump_stack(); \ 766 } \ 767 } while(0) 768 769 static inline u32 rtm_get_table(struct rtattr **rta, u8 table) 770 { 771 return RTA_GET_U32(rta[RTA_TABLE-1]); 772 rtattr_failure: 773 return table; 774 } 775 776 #endif /* __KERNEL__ */ 777 778 779 #endif /* __LINUX_RTNETLINK_H */ 780