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_DELADDRLABEL RTM_DELADDRLABEL 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 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 unsigned char rtm_family; 158 unsigned char rtm_dst_len; 159 unsigned char rtm_src_len; 160 unsigned char rtm_tos; 161 162 unsigned char rtm_table; /* Routing table id */ 163 unsigned char rtm_protocol; /* Routing protocol; see below */ 164 unsigned char rtm_scope; /* See below */ 165 unsigned char rtm_type; /* See below */ 166 167 unsigned rtm_flags; 168 }; 169 170 /* rtm_type */ 171 172 enum { 173 RTN_UNSPEC, 174 RTN_UNICAST, /* Gateway or direct route */ 175 RTN_LOCAL, /* Accept locally */ 176 RTN_BROADCAST, /* Accept locally as broadcast, 177 send as broadcast */ 178 RTN_ANYCAST, /* Accept locally as broadcast, 179 but send as unicast */ 180 RTN_MULTICAST, /* Multicast route */ 181 RTN_BLACKHOLE, /* Drop */ 182 RTN_UNREACHABLE, /* Destination is unreachable */ 183 RTN_PROHIBIT, /* Administratively prohibited */ 184 RTN_THROW, /* Not in this table */ 185 RTN_NAT, /* Translate this address */ 186 RTN_XRESOLVE, /* Use external resolver */ 187 __RTN_MAX 188 }; 189 190 #define RTN_MAX (__RTN_MAX - 1) 191 192 193 /* rtm_protocol */ 194 195 #define RTPROT_UNSPEC 0 196 #define RTPROT_REDIRECT 1 /* Route installed by ICMP redirects; 197 not used by current IPv4 */ 198 #define RTPROT_KERNEL 2 /* Route installed by kernel */ 199 #define RTPROT_BOOT 3 /* Route installed during boot */ 200 #define RTPROT_STATIC 4 /* Route installed by administrator */ 201 202 /* Values of protocol >= RTPROT_STATIC are not interpreted by kernel; 203 they are just passed from user and back as is. 204 It will be used by hypothetical multiple routing daemons. 205 Note that protocol values should be standardized in order to 206 avoid conflicts. 207 */ 208 209 #define RTPROT_GATED 8 /* Apparently, GateD */ 210 #define RTPROT_RA 9 /* RDISC/ND router advertisements */ 211 #define RTPROT_MRT 10 /* Merit MRT */ 212 #define RTPROT_ZEBRA 11 /* Zebra */ 213 #define RTPROT_BIRD 12 /* BIRD */ 214 #define RTPROT_DNROUTED 13 /* DECnet routing daemon */ 215 #define RTPROT_XORP 14 /* XORP */ 216 #define RTPROT_NTK 15 /* Netsukuku */ 217 #define RTPROT_DHCP 16 /* DHCP client */ 218 219 /* rtm_scope 220 221 Really it is not scope, but sort of distance to the destination. 222 NOWHERE are reserved for not existing destinations, HOST is our 223 local addresses, LINK are destinations, located on directly attached 224 link and UNIVERSE is everywhere in the Universe. 225 226 Intermediate values are also possible f.e. interior routes 227 could be assigned a value between UNIVERSE and LINK. 228 */ 229 230 enum rt_scope_t { 231 RT_SCOPE_UNIVERSE=0, 232 /* User defined values */ 233 RT_SCOPE_SITE=200, 234 RT_SCOPE_LINK=253, 235 RT_SCOPE_HOST=254, 236 RT_SCOPE_NOWHERE=255 237 }; 238 239 /* rtm_flags */ 240 241 #define RTM_F_NOTIFY 0x100 /* Notify user of route change */ 242 #define RTM_F_CLONED 0x200 /* This route is cloned */ 243 #define RTM_F_EQUALIZE 0x400 /* Multipath equalizer: NI */ 244 #define RTM_F_PREFIX 0x800 /* Prefix addresses */ 245 246 /* Reserved table identifiers */ 247 248 enum rt_class_t { 249 RT_TABLE_UNSPEC=0, 250 /* User defined values */ 251 RT_TABLE_COMPAT=252, 252 RT_TABLE_DEFAULT=253, 253 RT_TABLE_MAIN=254, 254 RT_TABLE_LOCAL=255, 255 RT_TABLE_MAX=0xFFFFFFFF 256 }; 257 258 259 /* Routing message attributes */ 260 261 enum rtattr_type_t { 262 RTA_UNSPEC, 263 RTA_DST, 264 RTA_SRC, 265 RTA_IIF, 266 RTA_OIF, 267 RTA_GATEWAY, 268 RTA_PRIORITY, 269 RTA_PREFSRC, 270 RTA_METRICS, 271 RTA_MULTIPATH, 272 RTA_PROTOINFO, /* no longer used */ 273 RTA_FLOW, 274 RTA_CACHEINFO, 275 RTA_SESSION, /* no longer used */ 276 RTA_MP_ALGO, /* no longer used */ 277 RTA_TABLE, 278 __RTA_MAX 279 }; 280 281 #define RTA_MAX (__RTA_MAX - 1) 282 283 #define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg)))) 284 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg)) 285 286 /* RTM_MULTIPATH --- array of struct rtnexthop. 287 * 288 * "struct rtnexthop" describes all necessary nexthop information, 289 * i.e. parameters of path to a destination via this nexthop. 290 * 291 * At the moment it is impossible to set different prefsrc, mtu, window 292 * and rtt for different paths from multipath. 293 */ 294 295 struct rtnexthop { 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 __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 RTAX_UNSPEC, 338 #define RTAX_UNSPEC RTAX_UNSPEC 339 RTAX_LOCK, 340 #define RTAX_LOCK RTAX_LOCK 341 RTAX_MTU, 342 #define RTAX_MTU RTAX_MTU 343 RTAX_WINDOW, 344 #define RTAX_WINDOW RTAX_WINDOW 345 RTAX_RTT, 346 #define RTAX_RTT RTAX_RTT 347 RTAX_RTTVAR, 348 #define RTAX_RTTVAR RTAX_RTTVAR 349 RTAX_SSTHRESH, 350 #define RTAX_SSTHRESH RTAX_SSTHRESH 351 RTAX_CWND, 352 #define RTAX_CWND RTAX_CWND 353 RTAX_ADVMSS, 354 #define RTAX_ADVMSS RTAX_ADVMSS 355 RTAX_REORDERING, 356 #define RTAX_REORDERING RTAX_REORDERING 357 RTAX_HOPLIMIT, 358 #define RTAX_HOPLIMIT RTAX_HOPLIMIT 359 RTAX_INITCWND, 360 #define RTAX_INITCWND RTAX_INITCWND 361 RTAX_FEATURES, 362 #define RTAX_FEATURES RTAX_FEATURES 363 RTAX_RTO_MIN, 364 #define RTAX_RTO_MIN RTAX_RTO_MIN 365 RTAX_INITRWND, 366 #define RTAX_INITRWND RTAX_INITRWND 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 __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 unsigned char rtgen_family; 404 }; 405 406 /***************************************************************** 407 * Link layer specific messages. 408 ****/ 409 410 /* struct ifinfomsg 411 * passes link level specific information, not dependent 412 * on network protocol. 413 */ 414 415 struct ifinfomsg { 416 unsigned char ifi_family; 417 unsigned char __ifi_pad; 418 unsigned short ifi_type; /* ARPHRD_* */ 419 int ifi_index; /* Link index */ 420 unsigned ifi_flags; /* IFF_* flags */ 421 unsigned ifi_change; /* IFF_* change mask */ 422 }; 423 424 /******************************************************************** 425 * prefix information 426 ****/ 427 428 struct prefixmsg { 429 unsigned char prefix_family; 430 unsigned char prefix_pad1; 431 unsigned short prefix_pad2; 432 int prefix_ifindex; 433 unsigned char prefix_type; 434 unsigned char prefix_len; 435 unsigned char prefix_flags; 436 unsigned char prefix_pad3; 437 }; 438 439 enum 440 { 441 PREFIX_UNSPEC, 442 PREFIX_ADDRESS, 443 PREFIX_CACHEINFO, 444 __PREFIX_MAX 445 }; 446 447 #define PREFIX_MAX (__PREFIX_MAX - 1) 448 449 struct prefix_cacheinfo { 450 __u32 preferred_time; 451 __u32 valid_time; 452 }; 453 454 455 /***************************************************************** 456 * Traffic control messages. 457 ****/ 458 459 struct tcmsg { 460 unsigned char tcm_family; 461 unsigned char tcm__pad1; 462 unsigned short tcm__pad2; 463 int tcm_ifindex; 464 __u32 tcm_handle; 465 __u32 tcm_parent; 466 __u32 tcm_info; 467 }; 468 469 enum { 470 TCA_UNSPEC, 471 TCA_KIND, 472 TCA_OPTIONS, 473 TCA_STATS, 474 TCA_XSTATS, 475 TCA_RATE, 476 TCA_FCNT, 477 TCA_STATS2, 478 TCA_STAB, 479 __TCA_MAX 480 }; 481 482 #define TCA_MAX (__TCA_MAX - 1) 483 484 #define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg)))) 485 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg)) 486 487 /******************************************************************** 488 * Neighbor Discovery userland options 489 ****/ 490 491 struct nduseroptmsg { 492 unsigned char nduseropt_family; 493 unsigned char nduseropt_pad1; 494 unsigned short nduseropt_opts_len; /* Total length of options */ 495 int nduseropt_ifindex; 496 __u8 nduseropt_icmp_type; 497 __u8 nduseropt_icmp_code; 498 unsigned short nduseropt_pad2; 499 unsigned int nduseropt_pad3; 500 /* Followed by one or more ND options */ 501 }; 502 503 enum { 504 NDUSEROPT_UNSPEC, 505 NDUSEROPT_SRCADDR, 506 __NDUSEROPT_MAX 507 }; 508 509 #define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1) 510 511 #ifndef __KERNEL__ 512 /* RTnetlink multicast groups - backwards compatibility for userspace */ 513 #define RTMGRP_LINK 1 514 #define RTMGRP_NOTIFY 2 515 #define RTMGRP_NEIGH 4 516 #define RTMGRP_TC 8 517 518 #define RTMGRP_IPV4_IFADDR 0x10 519 #define RTMGRP_IPV4_MROUTE 0x20 520 #define RTMGRP_IPV4_ROUTE 0x40 521 #define RTMGRP_IPV4_RULE 0x80 522 523 #define RTMGRP_IPV6_IFADDR 0x100 524 #define RTMGRP_IPV6_MROUTE 0x200 525 #define RTMGRP_IPV6_ROUTE 0x400 526 #define RTMGRP_IPV6_IFINFO 0x800 527 528 #define RTMGRP_DECnet_IFADDR 0x1000 529 #define RTMGRP_DECnet_ROUTE 0x4000 530 531 #define RTMGRP_IPV6_PREFIX 0x20000 532 #endif 533 534 /* RTnetlink multicast groups */ 535 enum rtnetlink_groups { 536 RTNLGRP_NONE, 537 #define RTNLGRP_NONE RTNLGRP_NONE 538 RTNLGRP_LINK, 539 #define RTNLGRP_LINK RTNLGRP_LINK 540 RTNLGRP_NOTIFY, 541 #define RTNLGRP_NOTIFY RTNLGRP_NOTIFY 542 RTNLGRP_NEIGH, 543 #define RTNLGRP_NEIGH RTNLGRP_NEIGH 544 RTNLGRP_TC, 545 #define RTNLGRP_TC RTNLGRP_TC 546 RTNLGRP_IPV4_IFADDR, 547 #define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR 548 RTNLGRP_IPV4_MROUTE, 549 #define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE 550 RTNLGRP_IPV4_ROUTE, 551 #define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE 552 RTNLGRP_IPV4_RULE, 553 #define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE 554 RTNLGRP_IPV6_IFADDR, 555 #define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR 556 RTNLGRP_IPV6_MROUTE, 557 #define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE 558 RTNLGRP_IPV6_ROUTE, 559 #define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE 560 RTNLGRP_IPV6_IFINFO, 561 #define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO 562 RTNLGRP_DECnet_IFADDR, 563 #define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR 564 RTNLGRP_NOP2, 565 RTNLGRP_DECnet_ROUTE, 566 #define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE 567 RTNLGRP_DECnet_RULE, 568 #define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE 569 RTNLGRP_NOP4, 570 RTNLGRP_IPV6_PREFIX, 571 #define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX 572 RTNLGRP_IPV6_RULE, 573 #define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE 574 RTNLGRP_ND_USEROPT, 575 #define RTNLGRP_ND_USEROPT RTNLGRP_ND_USEROPT 576 RTNLGRP_PHONET_IFADDR, 577 #define RTNLGRP_PHONET_IFADDR RTNLGRP_PHONET_IFADDR 578 RTNLGRP_PHONET_ROUTE, 579 #define RTNLGRP_PHONET_ROUTE RTNLGRP_PHONET_ROUTE 580 __RTNLGRP_MAX 581 }; 582 #define RTNLGRP_MAX (__RTNLGRP_MAX - 1) 583 584 /* TC action piece */ 585 struct tcamsg { 586 unsigned char tca_family; 587 unsigned char tca__pad1; 588 unsigned short tca__pad2; 589 }; 590 #define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg)))) 591 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg)) 592 #define TCA_ACT_TAB 1 /* attr type must be >=1 */ 593 #define TCAA_MAX 1 594 595 /* End of information exported to user level */ 596 597 #ifdef __KERNEL__ 598 599 #include <linux/mutex.h> 600 601 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str) 602 { 603 int len = strlen(str) + 1; 604 return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len); 605 } 606 607 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo); 608 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid); 609 extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, 610 u32 group, struct nlmsghdr *nlh, gfp_t flags); 611 extern void rtnl_set_sk_err(struct net *net, u32 group, int error); 612 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics); 613 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, 614 u32 id, u32 ts, u32 tsage, long expires, 615 u32 error); 616 617 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data); 618 619 #define RTA_PUT(skb, attrtype, attrlen, data) \ 620 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \ 621 goto rtattr_failure; \ 622 __rta_fill(skb, attrtype, attrlen, data); }) 623 624 #define RTA_APPEND(skb, attrlen, data) \ 625 ({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \ 626 goto rtattr_failure; \ 627 memcpy(skb_put(skb, attrlen), data, attrlen); }) 628 629 #define RTA_PUT_NOHDR(skb, attrlen, data) \ 630 ({ RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \ 631 memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \ 632 RTA_ALIGN(attrlen) - attrlen); }) 633 634 #define RTA_PUT_U8(skb, attrtype, value) \ 635 ({ u8 _tmp = (value); \ 636 RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); }) 637 638 #define RTA_PUT_U16(skb, attrtype, value) \ 639 ({ u16 _tmp = (value); \ 640 RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); }) 641 642 #define RTA_PUT_U32(skb, attrtype, value) \ 643 ({ u32 _tmp = (value); \ 644 RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); }) 645 646 #define RTA_PUT_U64(skb, attrtype, value) \ 647 ({ u64 _tmp = (value); \ 648 RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); }) 649 650 #define RTA_PUT_SECS(skb, attrtype, value) \ 651 RTA_PUT_U64(skb, attrtype, (value) / HZ) 652 653 #define RTA_PUT_MSECS(skb, attrtype, value) \ 654 RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value)) 655 656 #define RTA_PUT_STRING(skb, attrtype, value) \ 657 RTA_PUT(skb, attrtype, strlen(value) + 1, value) 658 659 #define RTA_PUT_FLAG(skb, attrtype) \ 660 RTA_PUT(skb, attrtype, 0, NULL); 661 662 #define RTA_NEST(skb, type) \ 663 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \ 664 RTA_PUT(skb, type, 0, NULL); \ 665 __start; }) 666 667 #define RTA_NEST_END(skb, start) \ 668 ({ (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ 669 (skb)->len; }) 670 671 #define RTA_NEST_COMPAT(skb, type, attrlen, data) \ 672 ({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \ 673 RTA_PUT(skb, type, attrlen, data); \ 674 RTA_NEST(skb, type); \ 675 __start; }) 676 677 #define RTA_NEST_COMPAT_END(skb, start) \ 678 ({ struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \ 679 (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ 680 RTA_NEST_END(skb, __nest); \ 681 (skb)->len; }) 682 683 #define RTA_NEST_CANCEL(skb, start) \ 684 ({ if (start) \ 685 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \ 686 -1; }) 687 688 #define RTA_GET_U8(rta) \ 689 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \ 690 goto rtattr_failure; \ 691 *(u8 *) RTA_DATA(rta); }) 692 693 #define RTA_GET_U16(rta) \ 694 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \ 695 goto rtattr_failure; \ 696 *(u16 *) RTA_DATA(rta); }) 697 698 #define RTA_GET_U32(rta) \ 699 ({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \ 700 goto rtattr_failure; \ 701 *(u32 *) RTA_DATA(rta); }) 702 703 #define RTA_GET_U64(rta) \ 704 ({ u64 _tmp; \ 705 if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \ 706 goto rtattr_failure; \ 707 memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \ 708 _tmp; }) 709 710 #define RTA_GET_FLAG(rta) (!!(rta)) 711 712 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ) 713 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta))) 714 715 static inline struct rtattr * 716 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen) 717 { 718 struct rtattr *rta; 719 int size = RTA_LENGTH(attrlen); 720 721 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size)); 722 rta->rta_type = attrtype; 723 rta->rta_len = size; 724 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size); 725 return rta; 726 } 727 728 #define __RTA_PUT(skb, attrtype, attrlen) \ 729 ({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \ 730 goto rtattr_failure; \ 731 __rta_reserve(skb, attrtype, attrlen); }) 732 733 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change); 734 735 /* RTNL is used as a global lock for all changes to network configuration */ 736 extern void rtnl_lock(void); 737 extern void rtnl_unlock(void); 738 extern int rtnl_trylock(void); 739 extern int rtnl_is_locked(void); 740 #ifdef CONFIG_PROVE_LOCKING 741 extern int lockdep_rtnl_is_held(void); 742 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 743 744 extern void rtnetlink_init(void); 745 extern void __rtnl_unlock(void); 746 747 #define ASSERT_RTNL() do { \ 748 if (unlikely(!rtnl_is_locked())) { \ 749 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \ 750 __FILE__, __LINE__); \ 751 dump_stack(); \ 752 } \ 753 } while(0) 754 755 static inline u32 rtm_get_table(struct rtattr **rta, u8 table) 756 { 757 return RTA_GET_U32(rta[RTA_TABLE-1]); 758 rtattr_failure: 759 return table; 760 } 761 762 #endif /* __KERNEL__ */ 763 764 765 #endif /* __LINUX_RTNETLINK_H */ 766