1 /* $OpenBSD: kroute.c,v 1.11 2009/04/09 19:03:10 stsp Exp $ */ 2 3 /* 4 * Copyright (c) 2004 Esben Norby <norby@openbsd.org> 5 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/param.h> 21 #include <sys/types.h> 22 #include <sys/socket.h> 23 #include <sys/sysctl.h> 24 #include <sys/tree.h> 25 #include <sys/uio.h> 26 #include <netinet/in.h> 27 #include <arpa/inet.h> 28 #include <net/if.h> 29 #include <net/if_dl.h> 30 #include <net/if_types.h> 31 #include <net/route.h> 32 #include <err.h> 33 #include <errno.h> 34 #include <fcntl.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <unistd.h> 39 40 #include "ospf6d.h" 41 #include "ospfe.h" 42 #include "log.h" 43 44 struct { 45 u_int32_t rtseq; 46 pid_t pid; 47 int fib_sync; 48 int fd; 49 struct event ev; 50 } kr_state; 51 52 struct kroute_node { 53 RB_ENTRY(kroute_node) entry; 54 struct kroute r; 55 struct kroute_node *next; 56 }; 57 58 void kr_redist_remove(struct kroute_node *, struct kroute_node *); 59 int kr_redist_eval(struct kroute *, struct rroute *); 60 void kr_redistribute(struct kroute_node *); 61 int kroute_compare(struct kroute_node *, struct kroute_node *); 62 63 struct kroute_node *kroute_find(const struct in6_addr *, u_int8_t); 64 struct kroute_node *kroute_matchgw(struct kroute_node *, 65 struct in6_addr *); 66 int kroute_insert(struct kroute_node *); 67 int kroute_remove(struct kroute_node *); 68 void kroute_clear(void); 69 70 struct iface *kif_update(u_short, int, struct if_data *, 71 struct sockaddr_dl *); 72 int kif_validate(u_short); 73 74 struct kroute_node *kroute_match(struct in6_addr *); 75 76 int protect_lo(void); 77 void get_rtaddrs(int, struct sockaddr *, struct sockaddr **); 78 void if_change(u_short, int, struct if_data *); 79 void if_newaddr(u_short, struct sockaddr_in6 *, 80 struct sockaddr_in6 *, struct sockaddr_in6 *); 81 void if_announce(void *); 82 83 int send_rtmsg(int, int, struct kroute *); 84 int dispatch_rtmsg(void); 85 int fetchtable(void); 86 87 RB_HEAD(kroute_tree, kroute_node) krt; 88 RB_PROTOTYPE(kroute_tree, kroute_node, entry, kroute_compare) 89 RB_GENERATE(kroute_tree, kroute_node, entry, kroute_compare) 90 91 int 92 kr_init(int fs) 93 { 94 int opt = 0, rcvbuf, default_rcvbuf; 95 socklen_t optlen; 96 97 kr_state.fib_sync = fs; 98 99 if ((kr_state.fd = socket(AF_ROUTE, SOCK_RAW, 0)) == -1) { 100 log_warn("kr_init: socket"); 101 return (-1); 102 } 103 104 /* not interested in my own messages */ 105 if (setsockopt(kr_state.fd, SOL_SOCKET, SO_USELOOPBACK, 106 &opt, sizeof(opt)) == -1) 107 log_warn("kr_init: setsockopt"); /* not fatal */ 108 109 /* grow receive buffer, don't wanna miss messages */ 110 optlen = sizeof(default_rcvbuf); 111 if (getsockopt(kr_state.fd, SOL_SOCKET, SO_RCVBUF, 112 &default_rcvbuf, &optlen) == -1) 113 log_warn("kr_init getsockopt SOL_SOCKET SO_RCVBUF"); 114 else 115 for (rcvbuf = MAX_RTSOCK_BUF; 116 rcvbuf > default_rcvbuf && 117 setsockopt(kr_state.fd, SOL_SOCKET, SO_RCVBUF, 118 &rcvbuf, sizeof(rcvbuf)) == -1 && errno == ENOBUFS; 119 rcvbuf /= 2) 120 ; /* nothing */ 121 122 kr_state.pid = getpid(); 123 kr_state.rtseq = 1; 124 125 RB_INIT(&krt); 126 127 if (fetchtable() == -1) 128 return (-1); 129 130 if (protect_lo() == -1) 131 return (-1); 132 133 event_set(&kr_state.ev, kr_state.fd, EV_READ | EV_PERSIST, 134 kr_dispatch_msg, NULL); 135 event_add(&kr_state.ev, NULL); 136 137 return (0); 138 } 139 140 int 141 kr_change(struct kroute *kroute) 142 { 143 struct kroute_node *kr; 144 int action = RTM_ADD; 145 146 kroute->rtlabel = rtlabel_tag2id(kroute->ext_tag); 147 148 if ((kr = kroute_find(&kroute->prefix, kroute->prefixlen)) != 149 NULL) { 150 if (!(kr->r.flags & F_KERNEL)) 151 action = RTM_CHANGE; 152 else { /* a non-ospf route already exists. not a problem */ 153 if (!(kr->r.flags & F_BGPD_INSERTED)) { 154 do { 155 kr->r.flags |= F_OSPFD_INSERTED; 156 kr = kr->next; 157 } while (kr); 158 return (0); 159 } 160 /* 161 * XXX as long as there is no multipath support in 162 * bgpd this is safe else we end up in a bad situation. 163 */ 164 /* 165 * ospf route has higher pref 166 * - reset flags to the ospf ones 167 * - use RTM_CHANGE 168 * - zero out ifindex (this is no longer relevant) 169 */ 170 action = RTM_CHANGE; 171 kr->r.flags = kroute->flags | F_OSPFD_INSERTED; 172 kr->r.ifindex = 0; 173 rtlabel_unref(kr->r.rtlabel); 174 kr->r.ext_tag = kroute->ext_tag; 175 kr->r.rtlabel = kroute->rtlabel; 176 } 177 } 178 179 /* nexthop within 127/8 -> ignore silently */ 180 if (kr && IN6_IS_ADDR_LOOPBACK(&kr->r.nexthop)) 181 return (0); 182 183 /* 184 * Ingnore updates that did not change the route. 185 * Currently only the nexthop can change. 186 */ 187 if (kr && IN6_ARE_ADDR_EQUAL(&kr->r.nexthop, &kroute->nexthop)) 188 return (0); 189 190 if (send_rtmsg(kr_state.fd, action, kroute) == -1) 191 return (-1); 192 193 if (action == RTM_ADD) { 194 if ((kr = calloc(1, sizeof(struct kroute_node))) == NULL) { 195 log_warn("kr_change"); 196 return (-1); 197 } 198 kr->r.prefix = kroute->prefix; 199 kr->r.prefixlen = kroute->prefixlen; 200 kr->r.nexthop = kroute->nexthop; 201 kr->r.flags = kroute->flags | F_OSPFD_INSERTED; 202 kr->r.ext_tag = kroute->ext_tag; 203 kr->r.rtlabel = kroute->rtlabel; 204 205 if (kroute_insert(kr) == -1) 206 free(kr); 207 } else if (kr) 208 kr->r.nexthop = kroute->nexthop; 209 210 return (0); 211 } 212 213 int 214 kr_delete(struct kroute *kroute) 215 { 216 struct kroute_node *kr; 217 218 if ((kr = kroute_find(&kroute->prefix, kroute->prefixlen)) == 219 NULL) 220 return (0); 221 222 if (!(kr->r.flags & F_OSPFD_INSERTED)) 223 return (0); 224 225 if (kr->r.flags & F_KERNEL) { 226 /* remove F_OSPFD_INSERTED flag, route still exists in kernel */ 227 do { 228 kr->r.flags &= ~F_OSPFD_INSERTED; 229 kr = kr->next; 230 } while (kr); 231 return (0); 232 } 233 234 if (send_rtmsg(kr_state.fd, RTM_DELETE, kroute) == -1) 235 return (-1); 236 237 if (kroute_remove(kr) == -1) 238 return (-1); 239 240 return (0); 241 } 242 243 void 244 kr_shutdown(void) 245 { 246 kr_fib_decouple(); 247 kroute_clear(); 248 } 249 250 void 251 kr_fib_couple(void) 252 { 253 struct kroute_node *kr; 254 255 if (kr_state.fib_sync == 1) /* already coupled */ 256 return; 257 258 kr_state.fib_sync = 1; 259 260 RB_FOREACH(kr, kroute_tree, &krt) 261 if (!(kr->r.flags & F_KERNEL)) 262 send_rtmsg(kr_state.fd, RTM_ADD, &kr->r); 263 264 log_info("kernel routing table coupled"); 265 } 266 267 void 268 kr_fib_decouple(void) 269 { 270 struct kroute_node *kr; 271 272 if (kr_state.fib_sync == 0) /* already decoupled */ 273 return; 274 275 RB_FOREACH(kr, kroute_tree, &krt) 276 if (!(kr->r.flags & F_KERNEL)) 277 send_rtmsg(kr_state.fd, RTM_DELETE, &kr->r); 278 279 kr_state.fib_sync = 0; 280 281 log_info("kernel routing table decoupled"); 282 } 283 284 /* ARGSUSED */ 285 void 286 kr_dispatch_msg(int fd, short event, void *bula) 287 { 288 dispatch_rtmsg(); 289 } 290 291 void 292 kr_show_route(struct imsg *imsg) 293 { 294 struct kroute_node *kr; 295 struct kroute_node *kn; 296 int flags; 297 struct in6_addr addr; 298 299 switch (imsg->hdr.type) { 300 case IMSG_CTL_KROUTE: 301 if (imsg->hdr.len != IMSG_HEADER_SIZE + sizeof(flags)) { 302 log_warnx("kr_show_route: wrong imsg len"); 303 return; 304 } 305 memcpy(&flags, imsg->data, sizeof(flags)); 306 RB_FOREACH(kr, kroute_tree, &krt) 307 if (!flags || kr->r.flags & flags) { 308 kn = kr; 309 do { 310 main_imsg_compose_ospfe(IMSG_CTL_KROUTE, 311 imsg->hdr.pid, 312 &kn->r, sizeof(kn->r)); 313 } while ((kn = kn->next) != NULL); 314 } 315 break; 316 case IMSG_CTL_KROUTE_ADDR: 317 if (imsg->hdr.len != IMSG_HEADER_SIZE + 318 sizeof(struct in6_addr)) { 319 log_warnx("kr_show_route: wrong imsg len"); 320 return; 321 } 322 memcpy(&addr, imsg->data, sizeof(addr)); 323 kr = NULL; 324 kr = kroute_match(&addr); 325 if (kr != NULL) 326 main_imsg_compose_ospfe(IMSG_CTL_KROUTE, imsg->hdr.pid, 327 &kr->r, sizeof(kr->r)); 328 break; 329 default: 330 log_debug("kr_show_route: error handling imsg"); 331 break; 332 } 333 334 main_imsg_compose_ospfe(IMSG_CTL_END, imsg->hdr.pid, NULL, 0); 335 } 336 337 void 338 kr_redist_remove(struct kroute_node *kh, struct kroute_node *kn) 339 { 340 struct rroute rr; 341 342 /* was the route redistributed? */ 343 if ((kn->r.flags & F_REDISTRIBUTED) == 0) 344 return; 345 346 /* remove redistributed flag */ 347 kn->r.flags &= ~F_REDISTRIBUTED; 348 rr.kr = kn->r; 349 rr.metric = DEFAULT_REDIST_METRIC; /* some dummy value */ 350 351 /* probably inform the RDE (check if no other path is redistributed) */ 352 for (kn = kh; kn; kn = kn->next) 353 if (kn->r.flags & F_REDISTRIBUTED) 354 break; 355 356 if (kn == NULL) 357 main_imsg_compose_rde(IMSG_NETWORK_DEL, 0, &rr, 358 sizeof(struct rroute)); 359 } 360 361 int 362 kr_redist_eval(struct kroute *kr, struct rroute *rr) 363 { 364 u_int32_t metric = 0; 365 366 /* Only non-ospfd routes are considered for redistribution. */ 367 if (!(kr->flags & F_KERNEL)) 368 goto dont_redistribute; 369 370 /* Dynamic routes are not redistributable. */ 371 if (kr->flags & F_DYNAMIC) 372 goto dont_redistribute; 373 374 /* interface is not up and running so don't announce */ 375 if (kr->flags & F_DOWN) 376 goto dont_redistribute; 377 378 /* 379 * We consider unspecified, loopback, multicast, link- and site-local, 380 * IPv4 mapped and IPv4 compatible addresses as not redistributable. 381 */ 382 if (IN6_IS_ADDR_UNSPECIFIED(&kr->prefix) || 383 IN6_IS_ADDR_LOOPBACK(&kr->prefix) || 384 IN6_IS_ADDR_MULTICAST(&kr->prefix) || 385 IN6_IS_ADDR_LINKLOCAL(&kr->prefix) || 386 IN6_IS_ADDR_SITELOCAL(&kr->prefix) || 387 IN6_IS_ADDR_V4MAPPED(&kr->prefix) || 388 IN6_IS_ADDR_V4COMPAT(&kr->prefix)) 389 goto dont_redistribute; 390 /* 391 * Consider networks with nexthop loopback as not redistributable. 392 */ 393 if (IN6_IS_ADDR_LOOPBACK(&kr->nexthop)) 394 goto dont_redistribute; 395 396 /* Should we redistrubute this route? */ 397 if (!ospf_redistribute(kr, &metric)) 398 goto dont_redistribute; 399 400 /* prefix should be redistributed */ 401 kr->flags |= F_REDISTRIBUTED; 402 /* 403 * only on of all multipath routes can be redistributed so 404 * redistribute the best one. 405 */ 406 if (rr->metric > metric) { 407 rr->kr = *kr; 408 rr->metric = metric; 409 } 410 return (1); 411 412 dont_redistribute: 413 /* was the route redistributed? */ 414 if ((kr->flags & F_REDISTRIBUTED) == 0) 415 return (0); 416 417 kr->flags &= ~F_REDISTRIBUTED; 418 return (1); 419 } 420 421 void 422 kr_redistribute(struct kroute_node *kh) 423 { 424 struct kroute_node *kn; 425 struct rroute rr; 426 int redistribute = 0; 427 428 bzero(&rr, sizeof(rr)); 429 rr.metric = UINT_MAX; 430 for (kn = kh; kn; kn = kn->next) 431 if (kr_redist_eval(&kn->r, &rr)) 432 redistribute = 1; 433 434 if (!redistribute) 435 return; 436 437 if (rr.kr.flags & F_REDISTRIBUTED) { 438 main_imsg_compose_rde(IMSG_NETWORK_ADD, 0, &rr, 439 sizeof(struct rroute)); 440 } else { 441 rr.metric = DEFAULT_REDIST_METRIC; /* some dummy value */ 442 rr.kr = kh->r; 443 main_imsg_compose_rde(IMSG_NETWORK_DEL, 0, &rr, 444 sizeof(struct rroute)); 445 } 446 } 447 448 void 449 kr_reload(void) 450 { 451 struct kroute_node *kr, *kn; 452 u_int32_t dummy; 453 int r; 454 455 RB_FOREACH(kr, kroute_tree, &krt) { 456 for (kn = kr; kn; kn = kn->next) { 457 r = ospf_redistribute(&kn->r, &dummy); 458 /* 459 * if it is redistributed, redistribute again metric 460 * may have changed. 461 */ 462 if ((kn->r.flags & F_REDISTRIBUTED && !r) || r) 463 break; 464 } 465 if (kn) { 466 /* 467 * kr_redistribute copes with removes and RDE with 468 * duplicates 469 */ 470 kr_redistribute(kr); 471 } 472 } 473 } 474 475 /* rb-tree compare */ 476 int 477 kroute_compare(struct kroute_node *a, struct kroute_node *b) 478 { 479 int i; 480 481 /* XXX maybe switch a & b */ 482 i = memcmp(&a->r.prefix, &b->r.prefix, sizeof(a->r.prefix)); 483 if (i) 484 return (i); 485 if (a->r.prefixlen < b->r.prefixlen) 486 return (-1); 487 if (a->r.prefixlen > b->r.prefixlen) 488 return (1); 489 return (0); 490 } 491 492 /* tree management */ 493 struct kroute_node * 494 kroute_find(const struct in6_addr *prefix, u_int8_t prefixlen) 495 { 496 struct kroute_node s; 497 498 s.r.prefix = *prefix; 499 s.r.prefixlen = prefixlen; 500 501 return (RB_FIND(kroute_tree, &krt, &s)); 502 } 503 504 struct kroute_node * 505 kroute_matchgw(struct kroute_node *kr, struct in6_addr *nh) 506 { 507 while (kr) { 508 if (IN6_ARE_ADDR_EQUAL(&kr->r.nexthop, nh)) 509 return (kr); 510 kr = kr->next; 511 } 512 513 return (NULL); 514 } 515 516 int 517 kroute_insert(struct kroute_node *kr) 518 { 519 struct kroute_node *krm; 520 521 if ((krm = RB_INSERT(kroute_tree, &krt, kr)) != NULL) { 522 /* 523 * Multipath route, add at end of list and clone the 524 * ospfd inserted flag. 525 */ 526 kr->r.flags |= krm->r.flags & F_OSPFD_INSERTED; 527 while (krm->next != NULL) 528 krm = krm->next; 529 krm->next = kr; 530 kr->next = NULL; /* to be sure */ 531 } else 532 krm = kr; 533 534 if (!(kr->r.flags & F_KERNEL)) { 535 /* don't validate or redistribute ospf route */ 536 kr->r.flags &= ~F_DOWN; 537 return (0); 538 } 539 540 if (kif_validate(kr->r.ifindex)) 541 kr->r.flags &= ~F_DOWN; 542 else 543 kr->r.flags |= F_DOWN; 544 545 kr_redistribute(krm); 546 return (0); 547 } 548 549 int 550 kroute_remove(struct kroute_node *kr) 551 { 552 struct kroute_node *krm; 553 554 if ((krm = RB_FIND(kroute_tree, &krt, kr)) == NULL) { 555 log_warnx("kroute_remove failed to find %s/%u", 556 log_in6addr(&kr->r.prefix), kr->r.prefixlen); 557 return (-1); 558 } 559 560 if (krm == kr) { 561 /* head element */ 562 if (RB_REMOVE(kroute_tree, &krt, kr) == NULL) { 563 log_warnx("kroute_remove failed for %s/%u", 564 log_in6addr(&kr->r.prefix), kr->r.prefixlen); 565 return (-1); 566 } 567 if (kr->next != NULL) { 568 if (RB_INSERT(kroute_tree, &krt, kr->next) != NULL) { 569 log_warnx("kroute_remove failed to add %s/%u", 570 log_in6addr(&kr->r.prefix), 571 kr->r.prefixlen); 572 return (-1); 573 } 574 } 575 } else { 576 /* somewhere in the list */ 577 while (krm->next != kr && krm->next != NULL) 578 krm = krm->next; 579 if (krm->next == NULL) { 580 log_warnx("kroute_remove multipath list corrupted " 581 "for %s/%u", log_in6addr(&kr->r.prefix), 582 kr->r.prefixlen); 583 return (-1); 584 } 585 krm->next = kr->next; 586 } 587 588 kr_redist_remove(krm, kr); 589 rtlabel_unref(kr->r.rtlabel); 590 591 free(kr); 592 return (0); 593 } 594 595 void 596 kroute_clear(void) 597 { 598 struct kroute_node *kr; 599 600 while ((kr = RB_MIN(kroute_tree, &krt)) != NULL) 601 kroute_remove(kr); 602 } 603 604 struct iface * 605 kif_update(u_short ifindex, int flags, struct if_data *ifd, 606 struct sockaddr_dl *sdl) 607 { 608 struct iface *iface; 609 char ifname[IF_NAMESIZE]; 610 611 if ((iface = if_find(ifindex)) == NULL) { 612 if (sdl && sdl->sdl_family == AF_LINK) { 613 bzero(ifname, sizeof(ifname)); 614 if (sdl->sdl_nlen >= sizeof(ifname)) 615 memcpy(ifname, sdl->sdl_data, 616 sizeof(ifname) - 1); 617 else if (sdl->sdl_nlen > 0) 618 memcpy(ifname, sdl->sdl_data, sdl->sdl_nlen); 619 } 620 621 if ((iface = if_new(ifindex, ifname)) == NULL) 622 return (NULL); 623 iface->cflags |= F_IFACE_AVAIL; 624 } 625 626 if_update(iface, ifd->ifi_mtu, flags, ifd->ifi_type, 627 ifd->ifi_link_state, ifd->ifi_baudrate); 628 629 return (iface); 630 } 631 632 int 633 kif_validate(u_short ifindex) 634 { 635 struct iface *iface; 636 637 if ((iface = if_find(ifindex)) == NULL) { 638 log_warnx("interface with index %u not found", ifindex); 639 return (1); 640 } 641 642 return (iface->nh_reachable); 643 } 644 645 struct kroute_node * 646 kroute_match(struct in6_addr *key) 647 { 648 int i; 649 struct kroute_node *kr; 650 struct in6_addr ina; 651 652 /* we will never match the default route */ 653 for (i = 128; i > 0; i--) { 654 inet6applymask(&ina, key, i); 655 if ((kr = kroute_find(&ina, i)) != NULL) 656 return (kr); 657 } 658 659 /* if we don't have a match yet, try to find a default route */ 660 if ((kr = kroute_find(&in6addr_any, 0)) != NULL) 661 return (kr); 662 663 return (NULL); 664 } 665 666 /* misc */ 667 int 668 protect_lo(void) 669 { 670 struct kroute_node *kr; 671 672 /* special protection for loopback */ 673 if ((kr = calloc(1, sizeof(struct kroute_node))) == NULL) { 674 log_warn("protect_lo"); 675 return (-1); 676 } 677 memcpy(&kr->r.prefix, &in6addr_loopback, sizeof(kr->r.prefix)); 678 kr->r.prefixlen = 128; 679 kr->r.flags = F_KERNEL|F_CONNECTED; 680 681 if (RB_INSERT(kroute_tree, &krt, kr) != NULL) 682 free(kr); /* kernel route already there, no problem */ 683 684 return (0); 685 } 686 687 u_int8_t 688 mask2prefixlen(struct sockaddr_in6 *sa_in6) 689 { 690 u_int8_t l = 0, i, len; 691 692 /* 693 * sin6_len is the size of the sockaddr so substract the offset of 694 * the possibly truncated sin6_addr struct. 695 */ 696 len = sa_in6->sin6_len - 697 (u_int8_t)(&((struct sockaddr_in6 *)NULL)->sin6_addr); 698 for (i = 0; i < len; i++) { 699 /* this "beauty" is adopted from sbin/route/show.c ... */ 700 switch (sa_in6->sin6_addr.s6_addr[i]) { 701 case 0xff: 702 l += 8; 703 break; 704 case 0xfe: 705 l += 7; 706 return (l); 707 case 0xfc: 708 l += 6; 709 return (l); 710 case 0xf8: 711 l += 5; 712 return (l); 713 case 0xf0: 714 l += 4; 715 return (l); 716 case 0xe0: 717 l += 3; 718 return (l); 719 case 0xc0: 720 l += 2; 721 return (l); 722 case 0x80: 723 l += 1; 724 return (l); 725 case 0x00: 726 return (l); 727 default: 728 fatalx("non continguous inet6 netmask"); 729 } 730 } 731 732 return (l); 733 } 734 735 struct in6_addr * 736 prefixlen2mask(u_int8_t prefixlen) 737 { 738 static struct in6_addr mask; 739 int i; 740 741 bzero(&mask, sizeof(mask)); 742 for (i = 0; i < prefixlen / 8; i++) 743 mask.s6_addr[i] = 0xff; 744 i = prefixlen % 8; 745 if (i) 746 mask.s6_addr[prefixlen / 8] = 0xff00 >> i; 747 748 return (&mask); 749 } 750 751 void 752 inet6applymask(struct in6_addr *dest, const struct in6_addr *src, int prefixlen) 753 { 754 struct in6_addr mask; 755 int i; 756 757 bzero(&mask, sizeof(mask)); 758 for (i = 0; i < prefixlen / 8; i++) 759 mask.s6_addr[i] = 0xff; 760 i = prefixlen % 8; 761 if (i) 762 mask.s6_addr[prefixlen / 8] = 0xff00 >> i; 763 764 for (i = 0; i < 16; i++) 765 dest->s6_addr[i] = src->s6_addr[i] & mask.s6_addr[i]; 766 } 767 768 #define ROUNDUP(a, size) \ 769 (((a) & ((size) - 1)) ? (1 + ((a) | ((size) - 1))) : (a)) 770 771 void 772 get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info) 773 { 774 int i; 775 776 for (i = 0; i < RTAX_MAX; i++) { 777 if (addrs & (1 << i)) { 778 rti_info[i] = sa; 779 sa = (struct sockaddr *)((char *)(sa) + 780 ROUNDUP(sa->sa_len, sizeof(long))); 781 } else 782 rti_info[i] = NULL; 783 } 784 } 785 786 void 787 if_change(u_short ifindex, int flags, struct if_data *ifd) 788 { 789 struct kroute_node *kr, *tkr; 790 struct iface *iface; 791 u_int8_t reachable; 792 793 if ((iface = kif_update(ifindex, flags, ifd, NULL)) == NULL) { 794 log_warn("if_change: kif_update(%u)", ifindex); 795 return; 796 } 797 798 reachable = (iface->flags & IFF_UP) && 799 (LINK_STATE_IS_UP(iface->linkstate) || 800 (iface->linkstate == LINK_STATE_UNKNOWN && 801 iface->media_type != IFT_CARP)); 802 803 if (reachable == iface->nh_reachable) 804 return; /* nothing changed wrt nexthop validity */ 805 806 iface->nh_reachable = reachable; 807 808 /* notify ospfe about interface link state */ 809 if (iface->cflags & F_IFACE_CONFIGURED) 810 main_imsg_compose_ospfe(IMSG_IFINFO, 0, iface, 811 sizeof(struct iface)); 812 813 /* update redistribute list */ 814 RB_FOREACH(kr, kroute_tree, &krt) { 815 for (tkr = kr; tkr != NULL; tkr = tkr->next) { 816 if (tkr->r.ifindex == ifindex) { 817 if (reachable) 818 tkr->r.flags &= ~F_DOWN; 819 else 820 tkr->r.flags |= F_DOWN; 821 822 } 823 } 824 kr_redistribute(kr); 825 } 826 } 827 828 void 829 if_newaddr(u_short ifindex, struct sockaddr_in6 *ifa, struct sockaddr_in6 *mask, 830 struct sockaddr_in6 *brd) 831 { 832 struct iface *iface; 833 struct iface_addr *ia; 834 835 if (ifa == NULL || ifa->sin6_family != AF_INET6) 836 return; 837 if ((iface = if_find(ifindex)) == NULL) { 838 log_warnx("if_newaddr: corresponding if %i not found", ifindex); 839 return; 840 } 841 842 /* We only care about link-local and global-scope. */ 843 if (IN6_IS_ADDR_UNSPECIFIED(&ifa->sin6_addr) || 844 IN6_IS_ADDR_LOOPBACK(&ifa->sin6_addr) || 845 IN6_IS_ADDR_MULTICAST(&ifa->sin6_addr) || 846 IN6_IS_ADDR_SITELOCAL(&ifa->sin6_addr) || 847 IN6_IS_ADDR_V4MAPPED(&ifa->sin6_addr) || 848 IN6_IS_ADDR_V4COMPAT(&ifa->sin6_addr)) 849 return; 850 851 /* XXX thanks, KAME, for this ugliness... adopted from route/show.c */ 852 if (IN6_IS_ADDR_LINKLOCAL(&ifa->sin6_addr)) { 853 ifa->sin6_addr.s6_addr[2] = 0; 854 ifa->sin6_addr.s6_addr[3] = 0; 855 } 856 857 if (IN6_IS_ADDR_LINKLOCAL(&ifa->sin6_addr)) 858 iface->addr = ifa->sin6_addr; 859 860 if ((ia = calloc(1, sizeof(struct iface_addr))) == NULL) 861 fatal("if_newaddr"); 862 863 ia->addr = ifa->sin6_addr; 864 865 if (mask) 866 ia->prefixlen = mask2prefixlen(mask); 867 else 868 ia->prefixlen = 0; 869 if (brd && brd->sin6_family == AF_INET6) 870 ia->dstbrd = brd->sin6_addr; 871 else 872 bzero(&ia->dstbrd, sizeof(ia->dstbrd)); 873 874 switch (iface->type) { 875 case IF_TYPE_BROADCAST: 876 case IF_TYPE_NBMA: 877 log_debug("if_newaddr: ifindex %u, addr %s/%d", 878 ifindex, log_in6addr(&ia->addr), ia->prefixlen); 879 break; 880 case IF_TYPE_VIRTUALLINK: /* FIXME */ 881 break; 882 case IF_TYPE_POINTOPOINT: 883 case IF_TYPE_POINTOMULTIPOINT: 884 log_debug("if_newaddr: ifindex %u, addr %s/%d, " 885 "dest %s", ifindex, log_in6addr(&ia->addr), 886 ia->prefixlen, log_in6addr(&ia->dstbrd)); 887 break; 888 default: 889 fatalx("if_newaddr: unknown interface type"); 890 } 891 892 TAILQ_INSERT_TAIL(&iface->ifa_list, ia, entry); 893 } 894 895 void 896 if_announce(void *msg) 897 { 898 struct if_announcemsghdr *ifan; 899 struct iface *iface; 900 901 ifan = msg; 902 903 switch (ifan->ifan_what) { 904 case IFAN_ARRIVAL: 905 if ((iface = if_new(ifan->ifan_index, ifan->ifan_name)) == NULL) 906 fatal("if_announce failed"); 907 iface->cflags |= F_IFACE_AVAIL; 908 break; 909 case IFAN_DEPARTURE: 910 iface = if_find(ifan->ifan_index); 911 if (iface->cflags & F_IFACE_CONFIGURED) { 912 main_imsg_compose_rde(IMSG_IFDELETE, 0, 913 &iface->ifindex, sizeof(iface->ifindex)); 914 main_imsg_compose_ospfe(IMSG_IFDELETE, 0, 915 &iface->ifindex, sizeof(iface->ifindex)); 916 } 917 if_del(iface); 918 break; 919 } 920 } 921 922 /* rtsock */ 923 int 924 send_rtmsg(int fd, int action, struct kroute *kroute) 925 { 926 struct iovec iov[5]; 927 struct rt_msghdr hdr; 928 struct sockaddr_in6 prefix; 929 struct sockaddr_in6 nexthop; 930 struct sockaddr_in6 mask; 931 struct sockaddr_rtlabel sa_rl; 932 int iovcnt = 0; 933 const char *label; 934 935 if (kr_state.fib_sync == 0) 936 return (0); 937 938 /* initialize header */ 939 bzero(&hdr, sizeof(hdr)); 940 hdr.rtm_version = RTM_VERSION; 941 hdr.rtm_type = action; 942 hdr.rtm_flags = RTF_PROTO2; 943 hdr.rtm_priority = RTP_OSPF; 944 if (action == RTM_CHANGE) /* force PROTO2 reset the other flags */ 945 hdr.rtm_fmask = RTF_PROTO2|RTF_PROTO1|RTF_REJECT|RTF_BLACKHOLE; 946 hdr.rtm_seq = kr_state.rtseq++; /* overflow doesn't matter */ 947 hdr.rtm_msglen = sizeof(hdr); 948 /* adjust iovec */ 949 iov[iovcnt].iov_base = &hdr; 950 iov[iovcnt++].iov_len = sizeof(hdr); 951 952 bzero(&prefix, sizeof(prefix)); 953 prefix.sin6_len = sizeof(prefix); 954 prefix.sin6_family = AF_INET6; 955 prefix.sin6_addr = kroute->prefix; 956 /* adjust header */ 957 hdr.rtm_addrs |= RTA_DST; 958 hdr.rtm_msglen += sizeof(prefix); 959 /* adjust iovec */ 960 iov[iovcnt].iov_base = &prefix; 961 iov[iovcnt++].iov_len = sizeof(prefix); 962 963 if (!IN6_IS_ADDR_UNSPECIFIED(&kroute->nexthop)) { 964 bzero(&nexthop, sizeof(nexthop)); 965 nexthop.sin6_len = sizeof(nexthop); 966 nexthop.sin6_family = AF_INET6; 967 nexthop.sin6_addr = kroute->nexthop; 968 /* adjust header */ 969 hdr.rtm_flags |= RTF_GATEWAY; 970 hdr.rtm_addrs |= RTA_GATEWAY; 971 hdr.rtm_msglen += sizeof(nexthop); 972 /* adjust iovec */ 973 iov[iovcnt].iov_base = &nexthop; 974 iov[iovcnt++].iov_len = sizeof(nexthop); 975 } 976 977 bzero(&mask, sizeof(mask)); 978 mask.sin6_len = sizeof(mask); 979 mask.sin6_family = AF_INET6; 980 mask.sin6_addr = *prefixlen2mask(kroute->prefixlen); 981 /* adjust header */ 982 hdr.rtm_addrs |= RTA_NETMASK; 983 hdr.rtm_msglen += sizeof(mask); 984 /* adjust iovec */ 985 iov[iovcnt].iov_base = &mask; 986 iov[iovcnt++].iov_len = sizeof(mask); 987 988 if (kroute->rtlabel != 0) { 989 sa_rl.sr_len = sizeof(sa_rl); 990 sa_rl.sr_family = AF_UNSPEC; 991 label = rtlabel_id2name(kroute->rtlabel); 992 if (strlcpy(sa_rl.sr_label, label, 993 sizeof(sa_rl.sr_label)) >= sizeof(sa_rl.sr_label)) { 994 log_warnx("send_rtmsg: invalid rtlabel"); 995 return (-1); 996 } 997 /* adjust header */ 998 hdr.rtm_addrs |= RTA_LABEL; 999 hdr.rtm_msglen += sizeof(sa_rl); 1000 /* adjust iovec */ 1001 iov[iovcnt].iov_base = &sa_rl; 1002 iov[iovcnt++].iov_len = sizeof(sa_rl); 1003 } 1004 1005 retry: 1006 if (writev(fd, iov, iovcnt) == -1) { 1007 switch (errno) { 1008 case ESRCH: 1009 if (hdr.rtm_type == RTM_CHANGE) { 1010 hdr.rtm_type = RTM_ADD; 1011 goto retry; 1012 } else if (hdr.rtm_type == RTM_DELETE) { 1013 log_info("route %s/%u vanished before delete", 1014 log_sockaddr(&prefix), kroute->prefixlen); 1015 return (0); 1016 } else { 1017 log_warn("send_rtmsg: action %u, " 1018 "prefix %s/%u", hdr.rtm_type, 1019 log_sockaddr(&prefix), kroute->prefixlen); 1020 return (0); 1021 } 1022 break; 1023 default: 1024 log_warn("send_rtmsg: action %u, prefix %s/%u", 1025 hdr.rtm_type, log_sockaddr(&prefix), 1026 kroute->prefixlen); 1027 return (0); 1028 } 1029 } 1030 1031 return (0); 1032 } 1033 1034 int 1035 fetchtable(void) 1036 { 1037 size_t len; 1038 int mib[7]; 1039 char *buf, *next, *lim; 1040 struct rt_msghdr *rtm; 1041 struct sockaddr *sa, *rti_info[RTAX_MAX]; 1042 struct sockaddr_in6 *sa_in6; 1043 struct sockaddr_rtlabel *label; 1044 struct kroute_node *kr; 1045 1046 mib[0] = CTL_NET; 1047 mib[1] = AF_ROUTE; 1048 mib[2] = 0; 1049 mib[3] = AF_INET; 1050 mib[4] = NET_RT_DUMP; 1051 mib[5] = 0; 1052 mib[6] = 0; /* rtableid */ 1053 1054 if (sysctl(mib, 7, NULL, &len, NULL, 0) == -1) { 1055 log_warn("sysctl"); 1056 return (-1); 1057 } 1058 if ((buf = malloc(len)) == NULL) { 1059 log_warn("fetchtable"); 1060 return (-1); 1061 } 1062 if (sysctl(mib, 7, buf, &len, NULL, 0) == -1) { 1063 log_warn("sysctl"); 1064 free(buf); 1065 return (-1); 1066 } 1067 1068 lim = buf + len; 1069 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1070 rtm = (struct rt_msghdr *)next; 1071 if (rtm->rtm_version != RTM_VERSION) 1072 continue; 1073 sa = (struct sockaddr *)(rtm + 1); 1074 get_rtaddrs(rtm->rtm_addrs, sa, rti_info); 1075 1076 if ((sa = rti_info[RTAX_DST]) == NULL) 1077 continue; 1078 1079 if (rtm->rtm_flags & RTF_LLINFO) /* arp cache */ 1080 continue; 1081 1082 if ((kr = calloc(1, sizeof(struct kroute_node))) == NULL) { 1083 log_warn("fetchtable"); 1084 free(buf); 1085 return (-1); 1086 } 1087 1088 kr->r.flags = F_KERNEL; 1089 1090 switch (sa->sa_family) { 1091 case AF_INET6: 1092 kr->r.prefix = 1093 ((struct sockaddr_in6 *)sa)->sin6_addr; 1094 sa_in6 = (struct sockaddr_in6 *)rti_info[RTAX_NETMASK]; 1095 if (rtm->rtm_flags & RTF_STATIC) 1096 kr->r.flags |= F_STATIC; 1097 if (rtm->rtm_flags & RTF_DYNAMIC) 1098 kr->r.flags |= F_DYNAMIC; 1099 if (rtm->rtm_flags & RTF_PROTO1) 1100 kr->r.flags |= F_BGPD_INSERTED; 1101 if (sa_in6 != NULL) { 1102 if (sa_in6->sin6_len == 0) 1103 break; 1104 kr->r.prefixlen = 1105 mask2prefixlen(sa_in6); 1106 } else if (rtm->rtm_flags & RTF_HOST) 1107 kr->r.prefixlen = 128; 1108 else 1109 fatalx("classful IPv6 route?!!"); 1110 break; 1111 default: 1112 free(kr); 1113 continue; 1114 } 1115 1116 kr->r.ifindex = rtm->rtm_index; 1117 if ((sa = rti_info[RTAX_GATEWAY]) != NULL) 1118 switch (sa->sa_family) { 1119 case AF_INET6: 1120 kr->r.nexthop = 1121 ((struct sockaddr_in6 *)sa)->sin6_addr; 1122 break; 1123 case AF_LINK: 1124 kr->r.flags |= F_CONNECTED; 1125 break; 1126 } 1127 1128 if (rtm->rtm_flags & RTF_PROTO2) { 1129 send_rtmsg(kr_state.fd, RTM_DELETE, &kr->r); 1130 free(kr); 1131 } else { 1132 if ((label = (struct sockaddr_rtlabel *) 1133 rti_info[RTAX_LABEL]) != NULL) { 1134 kr->r.rtlabel = 1135 rtlabel_name2id(label->sr_label); 1136 kr->r.ext_tag = 1137 rtlabel_id2tag(kr->r.rtlabel); 1138 } 1139 kroute_insert(kr); 1140 } 1141 1142 } 1143 free(buf); 1144 return (0); 1145 } 1146 1147 int 1148 fetchifs(u_short ifindex) 1149 { 1150 size_t len; 1151 int mib[6]; 1152 char *buf, *next, *lim; 1153 struct rt_msghdr *rtm; 1154 struct if_msghdr ifm; 1155 struct ifa_msghdr *ifam; 1156 struct iface *iface; 1157 struct sockaddr *sa, *rti_info[RTAX_MAX]; 1158 1159 mib[0] = CTL_NET; 1160 mib[1] = AF_ROUTE; 1161 mib[2] = 0; 1162 mib[3] = AF_INET6; 1163 mib[4] = NET_RT_IFLIST; 1164 mib[5] = ifindex; 1165 1166 if (sysctl(mib, 6, NULL, &len, NULL, 0) == -1) { 1167 log_warn("sysctl"); 1168 return (-1); 1169 } 1170 if ((buf = malloc(len)) == NULL) { 1171 log_warn("fetchif"); 1172 return (-1); 1173 } 1174 if (sysctl(mib, 6, buf, &len, NULL, 0) == -1) { 1175 log_warn("sysctl"); 1176 free(buf); 1177 return (-1); 1178 } 1179 1180 lim = buf + len; 1181 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1182 rtm = (struct rt_msghdr *)next; 1183 if (rtm->rtm_version != RTM_VERSION) 1184 continue; 1185 switch (rtm->rtm_type) { 1186 case RTM_IFINFO: 1187 bcopy(rtm, &ifm, sizeof ifm); 1188 sa = (struct sockaddr *)(next + sizeof(ifm)); 1189 get_rtaddrs(ifm.ifm_addrs, sa, rti_info); 1190 1191 if ((iface = kif_update(ifm.ifm_index, 1192 ifm.ifm_flags, &ifm.ifm_data, 1193 (struct sockaddr_dl *)rti_info[RTAX_IFP])) == NULL) 1194 fatal("fetchifs"); 1195 1196 iface->nh_reachable = (iface->flags & IFF_UP) && 1197 (LINK_STATE_IS_UP(ifm.ifm_data.ifi_link_state) || 1198 (ifm.ifm_data.ifi_link_state == 1199 LINK_STATE_UNKNOWN && 1200 ifm.ifm_data.ifi_type != IFT_CARP)); 1201 break; 1202 case RTM_NEWADDR: 1203 ifam = (struct ifa_msghdr *)rtm; 1204 if ((ifam->ifam_addrs & (RTA_NETMASK | RTA_IFA | 1205 RTA_BRD)) == 0) 1206 break; 1207 sa = (struct sockaddr *)(ifam + 1); 1208 get_rtaddrs(ifam->ifam_addrs, sa, rti_info); 1209 1210 if_newaddr(ifam->ifam_index, 1211 (struct sockaddr_in6 *)rti_info[RTAX_IFA], 1212 (struct sockaddr_in6 *)rti_info[RTAX_NETMASK], 1213 (struct sockaddr_in6 *)rti_info[RTAX_BRD]); 1214 break; 1215 } 1216 } 1217 free(buf); 1218 return (0); 1219 } 1220 1221 int 1222 dispatch_rtmsg(void) 1223 { 1224 char buf[RT_BUF_SIZE]; 1225 ssize_t n; 1226 char *next, *lim; 1227 struct rt_msghdr *rtm; 1228 struct if_msghdr ifm; 1229 struct ifa_msghdr *ifam; 1230 struct sockaddr *sa, *rti_info[RTAX_MAX]; 1231 struct sockaddr_in6 *sa_in6; 1232 struct sockaddr_rtlabel *label; 1233 struct kroute_node *kr, *okr; 1234 struct in6_addr prefix, nexthop; 1235 u_int8_t prefixlen; 1236 int flags, mpath; 1237 u_short ifindex = 0; 1238 1239 if ((n = read(kr_state.fd, &buf, sizeof(buf))) == -1) { 1240 log_warn("dispatch_rtmsg: read error"); 1241 return (-1); 1242 } 1243 1244 if (n == 0) { 1245 log_warnx("routing socket closed"); 1246 return (-1); 1247 } 1248 1249 lim = buf + n; 1250 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1251 rtm = (struct rt_msghdr *)next; 1252 if (rtm->rtm_version != RTM_VERSION) 1253 continue; 1254 1255 bzero(&prefix, sizeof(prefix)); 1256 bzero(&nexthop, sizeof(nexthop)); 1257 prefixlen = 0; 1258 flags = F_KERNEL; 1259 mpath = 0; 1260 1261 if (rtm->rtm_type == RTM_ADD || rtm->rtm_type == RTM_CHANGE || 1262 rtm->rtm_type == RTM_DELETE) { 1263 sa = (struct sockaddr *)(rtm + 1); 1264 get_rtaddrs(rtm->rtm_addrs, sa, rti_info); 1265 1266 if (rtm->rtm_tableid != 0) 1267 continue; 1268 1269 if (rtm->rtm_pid == kr_state.pid) /* caused by us */ 1270 continue; 1271 1272 if (rtm->rtm_errno) /* failed attempts... */ 1273 continue; 1274 1275 if (rtm->rtm_flags & RTF_LLINFO) /* arp cache */ 1276 continue; 1277 1278 #ifdef RTF_MPATH 1279 if (rtm->rtm_flags & RTF_MPATH) 1280 mpath = 1; 1281 #endif 1282 switch (sa->sa_family) { 1283 case AF_INET6: 1284 prefix = 1285 ((struct sockaddr_in6 *)sa)->sin6_addr; 1286 sa_in6 = (struct sockaddr_in6 *) 1287 rti_info[RTAX_NETMASK]; 1288 if (sa_in6 != NULL) { 1289 if (sa_in6->sin6_len != 0) 1290 prefixlen = mask2prefixlen( 1291 sa_in6); 1292 } else if (rtm->rtm_flags & RTF_HOST) 1293 prefixlen = 128; 1294 else 1295 fatalx("classful IPv6 address?!!"); 1296 if (rtm->rtm_flags & RTF_STATIC) 1297 flags |= F_STATIC; 1298 if (rtm->rtm_flags & RTF_DYNAMIC) 1299 flags |= F_DYNAMIC; 1300 if (rtm->rtm_flags & RTF_PROTO1) 1301 flags |= F_BGPD_INSERTED; 1302 break; 1303 default: 1304 continue; 1305 } 1306 1307 ifindex = rtm->rtm_index; 1308 if ((sa = rti_info[RTAX_GATEWAY]) != NULL) { 1309 switch (sa->sa_family) { 1310 case AF_INET: 1311 nexthop = ((struct sockaddr_in6 *) 1312 sa)->sin6_addr; 1313 break; 1314 case AF_LINK: 1315 flags |= F_CONNECTED; 1316 break; 1317 } 1318 } 1319 } 1320 1321 switch (rtm->rtm_type) { 1322 case RTM_ADD: 1323 case RTM_CHANGE: 1324 if (IN6_IS_ADDR_UNSPECIFIED(&nexthop) == 0 && 1325 !(flags & F_CONNECTED)) { 1326 log_warnx("dispatch_rtmsg no nexthop for %s/%u", 1327 log_in6addr(&prefix), prefixlen); 1328 continue; 1329 } 1330 1331 if ((okr = kroute_find(&prefix, prefixlen)) != 1332 NULL) { 1333 /* just add new multipath routes */ 1334 if (mpath && rtm->rtm_type == RTM_ADD) 1335 goto add; 1336 /* get the correct route */ 1337 kr = okr; 1338 if (mpath && (kr = kroute_matchgw(okr, 1339 &nexthop)) == NULL) { 1340 log_warnx("dispatch_rtmsg mpath route" 1341 " not found"); 1342 /* add routes we missed out earlier */ 1343 goto add; 1344 } 1345 1346 /* 1347 * ospf route overridden by kernel. Preference 1348 * of the route is not checked because this is 1349 * forced -- most probably by a user. 1350 */ 1351 if (kr->r.flags & F_OSPFD_INSERTED) 1352 flags |= F_OSPFD_INSERTED; 1353 if (kr->r.flags & F_REDISTRIBUTED) 1354 flags |= F_REDISTRIBUTED; 1355 kr->r.nexthop = nexthop; 1356 kr->r.flags = flags; 1357 kr->r.ifindex = ifindex; 1358 1359 rtlabel_unref(kr->r.rtlabel); 1360 kr->r.rtlabel = 0; 1361 kr->r.ext_tag = 0; 1362 if ((label = (struct sockaddr_rtlabel *) 1363 rti_info[RTAX_LABEL]) != NULL) { 1364 kr->r.rtlabel = 1365 rtlabel_name2id(label->sr_label); 1366 kr->r.ext_tag = 1367 rtlabel_id2tag(kr->r.rtlabel); 1368 } 1369 1370 if (kif_validate(kr->r.ifindex)) 1371 kr->r.flags &= ~F_DOWN; 1372 else 1373 kr->r.flags |= F_DOWN; 1374 1375 /* just readd, the RDE will care */ 1376 kr_redistribute(okr); 1377 } else { 1378 add: 1379 if ((kr = calloc(1, 1380 sizeof(struct kroute_node))) == NULL) { 1381 log_warn("dispatch_rtmsg"); 1382 return (-1); 1383 } 1384 kr->r.prefix = prefix; 1385 kr->r.prefixlen = prefixlen; 1386 kr->r.nexthop = nexthop; 1387 kr->r.flags = flags; 1388 kr->r.ifindex = ifindex; 1389 1390 if ((label = (struct sockaddr_rtlabel *) 1391 rti_info[RTAX_LABEL]) != NULL) { 1392 kr->r.rtlabel = 1393 rtlabel_name2id(label->sr_label); 1394 kr->r.ext_tag = 1395 rtlabel_id2tag(kr->r.rtlabel); 1396 } 1397 1398 kroute_insert(kr); 1399 } 1400 break; 1401 case RTM_DELETE: 1402 if ((kr = kroute_find(&prefix, prefixlen)) == 1403 NULL) 1404 continue; 1405 if (!(kr->r.flags & F_KERNEL)) 1406 continue; 1407 /* get the correct route */ 1408 okr = kr; 1409 if (mpath && 1410 (kr = kroute_matchgw(kr, &nexthop)) == NULL) { 1411 log_warnx("dispatch_rtmsg mpath route" 1412 " not found"); 1413 return (-1); 1414 } 1415 /* 1416 * last route is getting removed request the 1417 * ospf route from the RDE to insert instead 1418 */ 1419 if (okr == kr && kr->next == NULL && 1420 kr->r.flags & F_OSPFD_INSERTED) 1421 main_imsg_compose_rde(IMSG_KROUTE_GET, 0, 1422 &kr->r, sizeof(struct kroute)); 1423 if (kroute_remove(kr) == -1) 1424 return (-1); 1425 break; 1426 case RTM_IFINFO: 1427 memcpy(&ifm, next, sizeof(ifm)); 1428 if_change(ifm.ifm_index, ifm.ifm_flags, 1429 &ifm.ifm_data); 1430 break; 1431 case RTM_NEWADDR: 1432 ifam = (struct ifa_msghdr *)rtm; 1433 if ((ifam->ifam_addrs & (RTA_NETMASK | RTA_IFA | 1434 RTA_BRD)) == 0) 1435 break; 1436 sa = (struct sockaddr *)(ifam + 1); 1437 get_rtaddrs(ifam->ifam_addrs, sa, rti_info); 1438 1439 if_newaddr(ifam->ifam_index, 1440 (struct sockaddr_in6 *)rti_info[RTAX_IFA], 1441 (struct sockaddr_in6 *)rti_info[RTAX_NETMASK], 1442 (struct sockaddr_in6 *)rti_info[RTAX_BRD]); 1443 break; 1444 case RTM_IFANNOUNCE: 1445 if_announce(next); 1446 break; 1447 default: 1448 /* ignore for now */ 1449 break; 1450 } 1451 } 1452 return (0); 1453 } 1454