1 /* 2 * Copyright (c) 2004 Luigi Rizzo, Alessandro Cerri. All rights reserved. 3 * Copyright (c) 2004-2008 Qing Li. All rights reserved. 4 * Copyright (c) 2008 Kip Macy. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "opt_ddb.h" 31 #include "opt_inet.h" 32 #include "opt_inet6.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/malloc.h> 37 #include <sys/mbuf.h> 38 #include <sys/syslog.h> 39 #include <sys/sysctl.h> 40 #include <sys/socket.h> 41 #include <sys/kernel.h> 42 #include <sys/lock.h> 43 #include <sys/mutex.h> 44 #include <sys/rwlock.h> 45 46 #ifdef DDB 47 #include <ddb/ddb.h> 48 #endif 49 50 #include <vm/uma.h> 51 52 #include <netinet/in.h> 53 #include <net/if_llatbl.h> 54 #include <net/if.h> 55 #include <net/if_dl.h> 56 #include <net/if_var.h> 57 #include <net/route.h> 58 #include <net/vnet.h> 59 #include <netinet/if_ether.h> 60 #include <netinet6/in6_var.h> 61 #include <netinet6/nd6.h> 62 63 MALLOC_DEFINE(M_LLTABLE, "lltable", "link level address tables"); 64 65 static VNET_DEFINE(SLIST_HEAD(, lltable), lltables) = 66 SLIST_HEAD_INITIALIZER(lltables); 67 #define V_lltables VNET(lltables) 68 69 struct rwlock lltable_rwlock; 70 RW_SYSINIT(lltable_rwlock, &lltable_rwlock, "lltable_rwlock"); 71 72 static void lltable_unlink(struct lltable *llt); 73 static void llentries_unlink(struct lltable *llt, struct llentries *head); 74 75 static void htable_unlink_entry(struct llentry *lle); 76 static void htable_link_entry(struct lltable *llt, struct llentry *lle); 77 static int htable_foreach_lle(struct lltable *llt, llt_foreach_cb_t *f, 78 void *farg); 79 80 /* 81 * Dump lle state for a specific address family. 82 */ 83 static int 84 lltable_dump_af(struct lltable *llt, struct sysctl_req *wr) 85 { 86 int error; 87 88 LLTABLE_LOCK_ASSERT(); 89 90 if (llt->llt_ifp->if_flags & IFF_LOOPBACK) 91 return (0); 92 error = 0; 93 94 IF_AFDATA_RLOCK(llt->llt_ifp); 95 error = lltable_foreach_lle(llt, 96 (llt_foreach_cb_t *)llt->llt_dump_entry, wr); 97 IF_AFDATA_RUNLOCK(llt->llt_ifp); 98 99 return (error); 100 } 101 102 /* 103 * Dump arp state for a specific address family. 104 */ 105 int 106 lltable_sysctl_dumparp(int af, struct sysctl_req *wr) 107 { 108 struct lltable *llt; 109 int error = 0; 110 111 LLTABLE_RLOCK(); 112 SLIST_FOREACH(llt, &V_lltables, llt_link) { 113 if (llt->llt_af == af) { 114 error = lltable_dump_af(llt, wr); 115 if (error != 0) 116 goto done; 117 } 118 } 119 done: 120 LLTABLE_RUNLOCK(); 121 return (error); 122 } 123 124 /* 125 * Common function helpers for chained hash table. 126 */ 127 128 /* 129 * Runs specified callback for each entry in @llt. 130 * Caller does the locking. 131 * 132 */ 133 static int 134 htable_foreach_lle(struct lltable *llt, llt_foreach_cb_t *f, void *farg) 135 { 136 struct llentry *lle, *next; 137 int i, error; 138 139 error = 0; 140 141 for (i = 0; i < llt->llt_hsize; i++) { 142 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 143 error = f(llt, lle, farg); 144 if (error != 0) 145 break; 146 } 147 } 148 149 return (error); 150 } 151 152 static void 153 htable_link_entry(struct lltable *llt, struct llentry *lle) 154 { 155 struct llentries *lleh; 156 uint32_t hashidx; 157 158 if ((lle->la_flags & LLE_LINKED) != 0) 159 return; 160 161 IF_AFDATA_WLOCK_ASSERT(llt->llt_ifp); 162 163 hashidx = llt->llt_hash(lle, llt->llt_hsize); 164 lleh = &llt->lle_head[hashidx]; 165 166 lle->lle_tbl = llt; 167 lle->lle_head = lleh; 168 lle->la_flags |= LLE_LINKED; 169 LIST_INSERT_HEAD(lleh, lle, lle_next); 170 } 171 172 static void 173 htable_unlink_entry(struct llentry *lle) 174 { 175 176 if ((lle->la_flags & LLE_LINKED) != 0) { 177 IF_AFDATA_WLOCK_ASSERT(lle->lle_tbl->llt_ifp); 178 LIST_REMOVE(lle, lle_next); 179 lle->la_flags &= ~(LLE_VALID | LLE_LINKED); 180 #if 0 181 lle->lle_tbl = NULL; 182 lle->lle_head = NULL; 183 #endif 184 } 185 } 186 187 struct prefix_match_data { 188 const struct sockaddr *addr; 189 const struct sockaddr *mask; 190 struct llentries dchain; 191 u_int flags; 192 }; 193 194 static int 195 htable_prefix_free_cb(struct lltable *llt, struct llentry *lle, void *farg) 196 { 197 struct prefix_match_data *pmd; 198 199 pmd = (struct prefix_match_data *)farg; 200 201 if (llt->llt_match_prefix(pmd->addr, pmd->mask, pmd->flags, lle)) { 202 LLE_WLOCK(lle); 203 LIST_INSERT_HEAD(&pmd->dchain, lle, lle_chain); 204 } 205 206 return (0); 207 } 208 209 static void 210 htable_prefix_free(struct lltable *llt, const struct sockaddr *addr, 211 const struct sockaddr *mask, u_int flags) 212 { 213 struct llentry *lle, *next; 214 struct prefix_match_data pmd; 215 216 bzero(&pmd, sizeof(pmd)); 217 pmd.addr = addr; 218 pmd.mask = mask; 219 pmd.flags = flags; 220 LIST_INIT(&pmd.dchain); 221 222 IF_AFDATA_WLOCK(llt->llt_ifp); 223 /* Push matching lles to chain */ 224 lltable_foreach_lle(llt, htable_prefix_free_cb, &pmd); 225 226 llentries_unlink(llt, &pmd.dchain); 227 IF_AFDATA_WUNLOCK(llt->llt_ifp); 228 229 LIST_FOREACH_SAFE(lle, &pmd.dchain, lle_chain, next) 230 lltable_free_entry(llt, lle); 231 } 232 233 static void 234 htable_free_tbl(struct lltable *llt) 235 { 236 237 free(llt->lle_head, M_LLTABLE); 238 free(llt, M_LLTABLE); 239 } 240 241 static void 242 llentries_unlink(struct lltable *llt, struct llentries *head) 243 { 244 struct llentry *lle, *next; 245 246 LIST_FOREACH_SAFE(lle, head, lle_chain, next) 247 llt->llt_unlink_entry(lle); 248 } 249 250 /* 251 * Helper function used to drop all mbufs in hold queue. 252 * 253 * Returns the number of held packets, if any, that were dropped. 254 */ 255 size_t 256 lltable_drop_entry_queue(struct llentry *lle) 257 { 258 size_t pkts_dropped; 259 struct mbuf *next; 260 261 LLE_WLOCK_ASSERT(lle); 262 263 pkts_dropped = 0; 264 while ((lle->la_numheld > 0) && (lle->la_hold != NULL)) { 265 next = lle->la_hold->m_nextpkt; 266 m_freem(lle->la_hold); 267 lle->la_hold = next; 268 lle->la_numheld--; 269 pkts_dropped++; 270 } 271 272 KASSERT(lle->la_numheld == 0, 273 ("%s: la_numheld %d > 0, pkts_droped %zd", __func__, 274 lle->la_numheld, pkts_dropped)); 275 276 return (pkts_dropped); 277 } 278 279 void 280 lltable_set_entry_addr(struct ifnet *ifp, struct llentry *lle, 281 const char *lladdr) 282 { 283 284 bcopy(lladdr, &lle->ll_addr, ifp->if_addrlen); 285 lle->la_flags |= LLE_VALID; 286 lle->r_flags |= RLLE_VALID; 287 } 288 289 /* 290 * Tries to update @lle link-level address. 291 * Since update requires AFDATA WLOCK, function 292 * drops @lle lock, acquires AFDATA lock and then acquires 293 * @lle lock to maintain lock order. 294 * 295 * Returns 1 on success. 296 */ 297 int 298 lltable_try_set_entry_addr(struct ifnet *ifp, struct llentry *lle, 299 const char *lladdr) 300 { 301 302 /* Perform real LLE update */ 303 /* use afdata WLOCK to update fields */ 304 LLE_WLOCK_ASSERT(lle); 305 LLE_ADDREF(lle); 306 LLE_WUNLOCK(lle); 307 IF_AFDATA_WLOCK(ifp); 308 LLE_WLOCK(lle); 309 310 /* 311 * Since we droppped LLE lock, other thread might have deleted 312 * this lle. Check and return 313 */ 314 if ((lle->la_flags & LLE_DELETED) != 0) { 315 IF_AFDATA_WUNLOCK(ifp); 316 LLE_FREE_LOCKED(lle); 317 return (0); 318 } 319 320 /* Update data */ 321 lltable_set_entry_addr(ifp, lle, lladdr); 322 323 IF_AFDATA_WUNLOCK(ifp); 324 325 LLE_REMREF(lle); 326 327 return (1); 328 } 329 330 /* 331 * 332 * Performes generic cleanup routines and frees lle. 333 * 334 * Called for non-linked entries, with callouts and 335 * other AF-specific cleanups performed. 336 * 337 * @lle must be passed WLOCK'ed 338 * 339 * Returns the number of held packets, if any, that were dropped. 340 */ 341 size_t 342 llentry_free(struct llentry *lle) 343 { 344 size_t pkts_dropped; 345 346 LLE_WLOCK_ASSERT(lle); 347 348 KASSERT((lle->la_flags & LLE_LINKED) == 0, ("freeing linked lle")); 349 350 pkts_dropped = lltable_drop_entry_queue(lle); 351 352 LLE_FREE_LOCKED(lle); 353 354 return (pkts_dropped); 355 } 356 357 /* 358 * (al)locate an llentry for address dst (equivalent to rtalloc for new-arp). 359 * 360 * If found the llentry * is returned referenced and unlocked. 361 */ 362 struct llentry * 363 llentry_alloc(struct ifnet *ifp, struct lltable *lt, 364 struct sockaddr_storage *dst) 365 { 366 struct llentry *la, *la_tmp; 367 368 IF_AFDATA_RLOCK(ifp); 369 la = lla_lookup(lt, LLE_EXCLUSIVE, (struct sockaddr *)dst); 370 IF_AFDATA_RUNLOCK(ifp); 371 372 if (la != NULL) { 373 LLE_ADDREF(la); 374 LLE_WUNLOCK(la); 375 return (la); 376 } 377 378 if ((ifp->if_flags & (IFF_NOARP | IFF_STATICARP)) == 0) { 379 la = lltable_alloc_entry(lt, 0, (struct sockaddr *)dst); 380 if (la == NULL) 381 return (NULL); 382 IF_AFDATA_WLOCK(ifp); 383 LLE_WLOCK(la); 384 /* Prefer any existing LLE over newly-created one */ 385 la_tmp = lla_lookup(lt, LLE_EXCLUSIVE, (struct sockaddr *)dst); 386 if (la_tmp == NULL) 387 lltable_link_entry(lt, la); 388 IF_AFDATA_WUNLOCK(ifp); 389 if (la_tmp != NULL) { 390 lltable_free_entry(lt, la); 391 la = la_tmp; 392 } 393 LLE_ADDREF(la); 394 LLE_WUNLOCK(la); 395 } 396 397 return (la); 398 } 399 400 /* 401 * Free all entries from given table and free itself. 402 */ 403 404 static int 405 lltable_free_cb(struct lltable *llt, struct llentry *lle, void *farg) 406 { 407 struct llentries *dchain; 408 409 dchain = (struct llentries *)farg; 410 411 LLE_WLOCK(lle); 412 LIST_INSERT_HEAD(dchain, lle, lle_chain); 413 414 return (0); 415 } 416 417 /* 418 * Free all entries from given table and free itself. 419 */ 420 void 421 lltable_free(struct lltable *llt) 422 { 423 struct llentry *lle, *next; 424 struct llentries dchain; 425 426 KASSERT(llt != NULL, ("%s: llt is NULL", __func__)); 427 428 lltable_unlink(llt); 429 430 LIST_INIT(&dchain); 431 IF_AFDATA_WLOCK(llt->llt_ifp); 432 /* Push all lles to @dchain */ 433 lltable_foreach_lle(llt, lltable_free_cb, &dchain); 434 llentries_unlink(llt, &dchain); 435 IF_AFDATA_WUNLOCK(llt->llt_ifp); 436 437 LIST_FOREACH_SAFE(lle, &dchain, lle_chain, next) { 438 if (callout_stop(&lle->lle_timer) > 0) 439 LLE_REMREF(lle); 440 llentry_free(lle); 441 } 442 443 llt->llt_free_tbl(llt); 444 } 445 446 #if 0 447 void 448 lltable_drain(int af) 449 { 450 struct lltable *llt; 451 struct llentry *lle; 452 register int i; 453 454 LLTABLE_RLOCK(); 455 SLIST_FOREACH(llt, &V_lltables, llt_link) { 456 if (llt->llt_af != af) 457 continue; 458 459 for (i=0; i < llt->llt_hsize; i++) { 460 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 461 LLE_WLOCK(lle); 462 if (lle->la_hold) { 463 m_freem(lle->la_hold); 464 lle->la_hold = NULL; 465 } 466 LLE_WUNLOCK(lle); 467 } 468 } 469 } 470 LLTABLE_RUNLOCK(); 471 } 472 #endif 473 474 /* 475 * Deletes an address from given lltable. 476 * Used for userland interaction to remove 477 * individual entries. Skips entries added by OS. 478 */ 479 int 480 lltable_delete_addr(struct lltable *llt, u_int flags, 481 const struct sockaddr *l3addr) 482 { 483 struct llentry *lle; 484 struct ifnet *ifp; 485 486 ifp = llt->llt_ifp; 487 IF_AFDATA_WLOCK(ifp); 488 lle = lla_lookup(llt, LLE_EXCLUSIVE, l3addr); 489 490 if (lle == NULL) { 491 IF_AFDATA_WUNLOCK(ifp); 492 return (ENOENT); 493 } 494 if ((lle->la_flags & LLE_IFADDR) != 0 && (flags & LLE_IFADDR) == 0) { 495 IF_AFDATA_WUNLOCK(ifp); 496 LLE_WUNLOCK(lle); 497 return (EPERM); 498 } 499 500 lltable_unlink_entry(llt, lle); 501 IF_AFDATA_WUNLOCK(ifp); 502 503 llt->llt_delete_entry(llt, lle); 504 505 return (0); 506 } 507 508 void 509 lltable_prefix_free(int af, struct sockaddr *addr, struct sockaddr *mask, 510 u_int flags) 511 { 512 struct lltable *llt; 513 514 LLTABLE_RLOCK(); 515 SLIST_FOREACH(llt, &V_lltables, llt_link) { 516 if (llt->llt_af != af) 517 continue; 518 519 llt->llt_prefix_free(llt, addr, mask, flags); 520 } 521 LLTABLE_RUNLOCK(); 522 } 523 524 struct lltable * 525 lltable_allocate_htbl(uint32_t hsize) 526 { 527 struct lltable *llt; 528 int i; 529 530 llt = malloc(sizeof(struct lltable), M_LLTABLE, M_WAITOK | M_ZERO); 531 llt->llt_hsize = hsize; 532 llt->lle_head = malloc(sizeof(struct llentries) * hsize, 533 M_LLTABLE, M_WAITOK | M_ZERO); 534 535 for (i = 0; i < llt->llt_hsize; i++) 536 LIST_INIT(&llt->lle_head[i]); 537 538 /* Set some default callbacks */ 539 llt->llt_link_entry = htable_link_entry; 540 llt->llt_unlink_entry = htable_unlink_entry; 541 llt->llt_prefix_free = htable_prefix_free; 542 llt->llt_foreach_entry = htable_foreach_lle; 543 llt->llt_free_tbl = htable_free_tbl; 544 545 return (llt); 546 } 547 548 /* 549 * Links lltable to global llt list. 550 */ 551 void 552 lltable_link(struct lltable *llt) 553 { 554 555 LLTABLE_WLOCK(); 556 SLIST_INSERT_HEAD(&V_lltables, llt, llt_link); 557 LLTABLE_WUNLOCK(); 558 } 559 560 static void 561 lltable_unlink(struct lltable *llt) 562 { 563 564 LLTABLE_WLOCK(); 565 SLIST_REMOVE(&V_lltables, llt, lltable, llt_link); 566 LLTABLE_WUNLOCK(); 567 568 } 569 570 /* 571 * External methods used by lltable consumers 572 */ 573 574 int 575 lltable_foreach_lle(struct lltable *llt, llt_foreach_cb_t *f, void *farg) 576 { 577 578 return (llt->llt_foreach_entry(llt, f, farg)); 579 } 580 581 struct llentry * 582 lltable_alloc_entry(struct lltable *llt, u_int flags, 583 const struct sockaddr *l3addr) 584 { 585 586 return (llt->llt_alloc_entry(llt, flags, l3addr)); 587 } 588 589 void 590 lltable_free_entry(struct lltable *llt, struct llentry *lle) 591 { 592 593 llt->llt_free_entry(llt, lle); 594 } 595 596 void 597 lltable_link_entry(struct lltable *llt, struct llentry *lle) 598 { 599 600 llt->llt_link_entry(llt, lle); 601 } 602 603 void 604 lltable_unlink_entry(struct lltable *llt, struct llentry *lle) 605 { 606 607 llt->llt_unlink_entry(lle); 608 } 609 610 void 611 lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa) 612 { 613 struct lltable *llt; 614 615 llt = lle->lle_tbl; 616 llt->llt_fill_sa_entry(lle, sa); 617 } 618 619 struct ifnet * 620 lltable_get_ifp(const struct lltable *llt) 621 { 622 623 return (llt->llt_ifp); 624 } 625 626 int 627 lltable_get_af(const struct lltable *llt) 628 { 629 630 return (llt->llt_af); 631 } 632 633 /* 634 * Called in route_output when rtm_flags contains RTF_LLDATA. 635 */ 636 int 637 lla_rt_output(struct rt_msghdr *rtm, struct rt_addrinfo *info) 638 { 639 struct sockaddr_dl *dl = 640 (struct sockaddr_dl *)info->rti_info[RTAX_GATEWAY]; 641 struct sockaddr *dst = (struct sockaddr *)info->rti_info[RTAX_DST]; 642 struct ifnet *ifp; 643 struct lltable *llt; 644 struct llentry *lle, *lle_tmp; 645 u_int laflags = 0; 646 int error; 647 648 KASSERT(dl != NULL && dl->sdl_family == AF_LINK, 649 ("%s: invalid dl\n", __func__)); 650 651 ifp = ifnet_byindex(dl->sdl_index); 652 if (ifp == NULL) { 653 log(LOG_INFO, "%s: invalid ifp (sdl_index %d)\n", 654 __func__, dl->sdl_index); 655 return EINVAL; 656 } 657 658 /* XXX linked list may be too expensive */ 659 LLTABLE_RLOCK(); 660 SLIST_FOREACH(llt, &V_lltables, llt_link) { 661 if (llt->llt_af == dst->sa_family && 662 llt->llt_ifp == ifp) 663 break; 664 } 665 LLTABLE_RUNLOCK(); 666 KASSERT(llt != NULL, ("Yep, ugly hacks are bad\n")); 667 668 error = 0; 669 670 switch (rtm->rtm_type) { 671 case RTM_ADD: 672 /* Add static LLE */ 673 laflags = 0; 674 if (rtm->rtm_rmx.rmx_expire == 0) 675 laflags = LLE_STATIC; 676 lle = lltable_alloc_entry(llt, laflags, dst); 677 if (lle == NULL) 678 return (ENOMEM); 679 680 bcopy(LLADDR(dl), &lle->ll_addr, ifp->if_addrlen); 681 if ((rtm->rtm_flags & RTF_ANNOUNCE)) 682 lle->la_flags |= LLE_PUB; 683 lle->la_flags |= LLE_VALID; 684 lle->r_flags |= RLLE_VALID; 685 lle->la_expire = rtm->rtm_rmx.rmx_expire; 686 687 laflags = lle->la_flags; 688 689 /* Try to link new entry */ 690 lle_tmp = NULL; 691 IF_AFDATA_WLOCK(ifp); 692 LLE_WLOCK(lle); 693 lle_tmp = lla_lookup(llt, LLE_EXCLUSIVE, dst); 694 if (lle_tmp != NULL) { 695 /* Check if we are trying to replace immutable entry */ 696 if ((lle_tmp->la_flags & LLE_IFADDR) != 0) { 697 IF_AFDATA_WUNLOCK(ifp); 698 LLE_WUNLOCK(lle_tmp); 699 lltable_free_entry(llt, lle); 700 return (EPERM); 701 } 702 /* Unlink existing entry from table */ 703 lltable_unlink_entry(llt, lle_tmp); 704 } 705 lltable_link_entry(llt, lle); 706 IF_AFDATA_WUNLOCK(ifp); 707 708 if (lle_tmp != NULL) { 709 EVENTHANDLER_INVOKE(lle_event, lle_tmp,LLENTRY_EXPIRED); 710 lltable_free_entry(llt, lle_tmp); 711 } 712 713 /* 714 * By invoking LLE handler here we might get 715 * two events on static LLE entry insertion 716 * in routing socket. However, since we might have 717 * other subscribers we need to generate this event. 718 */ 719 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_RESOLVED); 720 LLE_WUNLOCK(lle); 721 #ifdef INET 722 /* gratuitous ARP */ 723 if ((laflags & LLE_PUB) && dst->sa_family == AF_INET) 724 arprequest(ifp, 725 &((struct sockaddr_in *)dst)->sin_addr, 726 &((struct sockaddr_in *)dst)->sin_addr, 727 (u_char *)LLADDR(dl)); 728 #endif 729 730 break; 731 732 case RTM_DELETE: 733 return (lltable_delete_addr(llt, 0, dst)); 734 735 default: 736 error = EINVAL; 737 } 738 739 return (error); 740 } 741 742 #ifdef DDB 743 struct llentry_sa { 744 struct llentry base; 745 struct sockaddr l3_addr; 746 }; 747 748 static void 749 llatbl_lle_show(struct llentry_sa *la) 750 { 751 struct llentry *lle; 752 uint8_t octet[6]; 753 754 lle = &la->base; 755 db_printf("lle=%p\n", lle); 756 db_printf(" lle_next=%p\n", lle->lle_next.le_next); 757 db_printf(" lle_lock=%p\n", &lle->lle_lock); 758 db_printf(" lle_tbl=%p\n", lle->lle_tbl); 759 db_printf(" lle_head=%p\n", lle->lle_head); 760 db_printf(" la_hold=%p\n", lle->la_hold); 761 db_printf(" la_numheld=%d\n", lle->la_numheld); 762 db_printf(" la_expire=%ju\n", (uintmax_t)lle->la_expire); 763 db_printf(" la_flags=0x%04x\n", lle->la_flags); 764 db_printf(" la_asked=%u\n", lle->la_asked); 765 db_printf(" la_preempt=%u\n", lle->la_preempt); 766 db_printf(" ln_state=%d\n", lle->ln_state); 767 db_printf(" ln_router=%u\n", lle->ln_router); 768 db_printf(" ln_ntick=%ju\n", (uintmax_t)lle->ln_ntick); 769 db_printf(" lle_refcnt=%d\n", lle->lle_refcnt); 770 bcopy(&lle->ll_addr.mac16, octet, sizeof(octet)); 771 db_printf(" ll_addr=%02x:%02x:%02x:%02x:%02x:%02x\n", 772 octet[0], octet[1], octet[2], octet[3], octet[4], octet[5]); 773 db_printf(" lle_timer=%p\n", &lle->lle_timer); 774 775 switch (la->l3_addr.sa_family) { 776 #ifdef INET 777 case AF_INET: 778 { 779 struct sockaddr_in *sin; 780 char l3s[INET_ADDRSTRLEN]; 781 782 sin = (struct sockaddr_in *)&la->l3_addr; 783 inet_ntoa_r(sin->sin_addr, l3s); 784 db_printf(" l3_addr=%s\n", l3s); 785 break; 786 } 787 #endif 788 #ifdef INET6 789 case AF_INET6: 790 { 791 struct sockaddr_in6 *sin6; 792 char l3s[INET6_ADDRSTRLEN]; 793 794 sin6 = (struct sockaddr_in6 *)&la->l3_addr; 795 ip6_sprintf(l3s, &sin6->sin6_addr); 796 db_printf(" l3_addr=%s\n", l3s); 797 break; 798 } 799 #endif 800 default: 801 db_printf(" l3_addr=N/A (af=%d)\n", la->l3_addr.sa_family); 802 break; 803 } 804 } 805 806 DB_SHOW_COMMAND(llentry, db_show_llentry) 807 { 808 809 if (!have_addr) { 810 db_printf("usage: show llentry <struct llentry *>\n"); 811 return; 812 } 813 814 llatbl_lle_show((struct llentry_sa *)addr); 815 } 816 817 static void 818 llatbl_llt_show(struct lltable *llt) 819 { 820 int i; 821 struct llentry *lle; 822 823 db_printf("llt=%p llt_af=%d llt_ifp=%p\n", 824 llt, llt->llt_af, llt->llt_ifp); 825 826 for (i = 0; i < llt->llt_hsize; i++) { 827 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 828 829 llatbl_lle_show((struct llentry_sa *)lle); 830 if (db_pager_quit) 831 return; 832 } 833 } 834 } 835 836 DB_SHOW_COMMAND(lltable, db_show_lltable) 837 { 838 839 if (!have_addr) { 840 db_printf("usage: show lltable <struct lltable *>\n"); 841 return; 842 } 843 844 llatbl_llt_show((struct lltable *)addr); 845 } 846 847 DB_SHOW_ALL_COMMAND(lltables, db_show_all_lltables) 848 { 849 VNET_ITERATOR_DECL(vnet_iter); 850 struct lltable *llt; 851 852 VNET_FOREACH(vnet_iter) { 853 CURVNET_SET_QUIET(vnet_iter); 854 #ifdef VIMAGE 855 db_printf("vnet=%p\n", curvnet); 856 #endif 857 SLIST_FOREACH(llt, &V_lltables, llt_link) { 858 db_printf("llt=%p llt_af=%d llt_ifp=%p(%s)\n", 859 llt, llt->llt_af, llt->llt_ifp, 860 (llt->llt_ifp != NULL) ? 861 llt->llt_ifp->if_xname : "?"); 862 if (have_addr && addr != 0) /* verbose */ 863 llatbl_llt_show(llt); 864 if (db_pager_quit) { 865 CURVNET_RESTORE(); 866 return; 867 } 868 } 869 CURVNET_RESTORE(); 870 } 871 } 872 #endif 873