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 #define V_lltables VNET(lltables) 67 68 static void vnet_lltable_init(void); 69 70 struct rwlock lltable_rwlock; 71 RW_SYSINIT(lltable_rwlock, &lltable_rwlock, "lltable_rwlock"); 72 73 static void lltable_unlink(struct lltable *llt); 74 static void llentries_unlink(struct lltable *llt, struct llentries *head); 75 76 static void htable_unlink_entry(struct llentry *lle); 77 static void htable_link_entry(struct lltable *llt, struct llentry *lle); 78 static int htable_foreach_lle(struct lltable *llt, llt_foreach_cb_t *f, 79 void *farg); 80 81 /* 82 * Dump lle state for a specific address family. 83 */ 84 static int 85 lltable_dump_af(struct lltable *llt, struct sysctl_req *wr) 86 { 87 int error; 88 89 LLTABLE_LOCK_ASSERT(); 90 91 if (llt->llt_ifp->if_flags & IFF_LOOPBACK) 92 return (0); 93 error = 0; 94 95 IF_AFDATA_RLOCK(llt->llt_ifp); 96 error = lltable_foreach_lle(llt, 97 (llt_foreach_cb_t *)llt->llt_dump_entry, wr); 98 IF_AFDATA_RUNLOCK(llt->llt_ifp); 99 100 return (error); 101 } 102 103 /* 104 * Dump arp state for a specific address family. 105 */ 106 int 107 lltable_sysctl_dumparp(int af, struct sysctl_req *wr) 108 { 109 struct lltable *llt; 110 int error = 0; 111 112 LLTABLE_RLOCK(); 113 SLIST_FOREACH(llt, &V_lltables, llt_link) { 114 if (llt->llt_af == af) { 115 error = lltable_dump_af(llt, wr); 116 if (error != 0) 117 goto done; 118 } 119 } 120 done: 121 LLTABLE_RUNLOCK(); 122 return (error); 123 } 124 125 /* 126 * Common function helpers for chained hash table. 127 */ 128 129 /* 130 * Runs specified callback for each entry in @llt. 131 * Caller does the locking. 132 * 133 */ 134 static int 135 htable_foreach_lle(struct lltable *llt, llt_foreach_cb_t *f, void *farg) 136 { 137 struct llentry *lle, *next; 138 int i, error; 139 140 error = 0; 141 142 for (i = 0; i < llt->llt_hsize; i++) { 143 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 144 error = f(llt, lle, farg); 145 if (error != 0) 146 break; 147 } 148 } 149 150 return (error); 151 } 152 153 static void 154 htable_link_entry(struct lltable *llt, struct llentry *lle) 155 { 156 struct llentries *lleh; 157 uint32_t hashidx; 158 159 if ((lle->la_flags & LLE_LINKED) != 0) 160 return; 161 162 IF_AFDATA_WLOCK_ASSERT(llt->llt_ifp); 163 164 hashidx = llt->llt_hash(lle, llt->llt_hsize); 165 lleh = &llt->lle_head[hashidx]; 166 167 lle->lle_tbl = llt; 168 lle->lle_head = lleh; 169 lle->la_flags |= LLE_LINKED; 170 LIST_INSERT_HEAD(lleh, lle, lle_next); 171 } 172 173 static void 174 htable_unlink_entry(struct llentry *lle) 175 { 176 177 if ((lle->la_flags & LLE_LINKED) != 0) { 178 IF_AFDATA_WLOCK_ASSERT(lle->lle_tbl->llt_ifp); 179 LIST_REMOVE(lle, lle_next); 180 lle->la_flags &= ~(LLE_VALID | LLE_LINKED); 181 #if 0 182 lle->lle_tbl = NULL; 183 lle->lle_head = NULL; 184 #endif 185 } 186 } 187 188 struct prefix_match_data { 189 const struct sockaddr *prefix; 190 const struct sockaddr *mask; 191 struct llentries dchain; 192 u_int flags; 193 }; 194 195 static int 196 htable_prefix_free_cb(struct lltable *llt, struct llentry *lle, void *farg) 197 { 198 struct prefix_match_data *pmd; 199 200 pmd = (struct prefix_match_data *)farg; 201 202 if (llt->llt_match_prefix(pmd->prefix, pmd->mask, pmd->flags, lle)) { 203 LLE_WLOCK(lle); 204 LIST_INSERT_HEAD(&pmd->dchain, lle, lle_chain); 205 } 206 207 return (0); 208 } 209 210 static void 211 htable_prefix_free(struct lltable *llt, const struct sockaddr *prefix, 212 const struct sockaddr *mask, u_int flags) 213 { 214 struct llentry *lle, *next; 215 struct prefix_match_data pmd; 216 217 bzero(&pmd, sizeof(pmd)); 218 pmd.prefix = prefix; 219 pmd.mask = mask; 220 pmd.flags = flags; 221 LIST_INIT(&pmd.dchain); 222 223 IF_AFDATA_WLOCK(llt->llt_ifp); 224 /* Push matching lles to chain */ 225 lltable_foreach_lle(llt, htable_prefix_free_cb, &pmd); 226 227 llentries_unlink(llt, &pmd.dchain); 228 IF_AFDATA_WUNLOCK(llt->llt_ifp); 229 230 LIST_FOREACH_SAFE(lle, &pmd.dchain, lle_chain, next) 231 lltable_free_entry(llt, lle); 232 } 233 234 static void 235 htable_free_tbl(struct lltable *llt) 236 { 237 238 free(llt->lle_head, M_LLTABLE); 239 free(llt, M_LLTABLE); 240 } 241 242 static void 243 llentries_unlink(struct lltable *llt, struct llentries *head) 244 { 245 struct llentry *lle, *next; 246 247 LIST_FOREACH_SAFE(lle, head, lle_chain, next) 248 llt->llt_unlink_entry(lle); 249 } 250 251 /* 252 * Helper function used to drop all mbufs in hold queue. 253 * 254 * Returns the number of held packets, if any, that were dropped. 255 */ 256 size_t 257 lltable_drop_entry_queue(struct llentry *lle) 258 { 259 size_t pkts_dropped; 260 struct mbuf *next; 261 262 LLE_WLOCK_ASSERT(lle); 263 264 pkts_dropped = 0; 265 while ((lle->la_numheld > 0) && (lle->la_hold != NULL)) { 266 next = lle->la_hold->m_nextpkt; 267 m_freem(lle->la_hold); 268 lle->la_hold = next; 269 lle->la_numheld--; 270 pkts_dropped++; 271 } 272 273 KASSERT(lle->la_numheld == 0, 274 ("%s: la_numheld %d > 0, pkts_droped %zd", __func__, 275 lle->la_numheld, pkts_dropped)); 276 277 return (pkts_dropped); 278 } 279 280 /* 281 * 282 * Performes generic cleanup routines and frees lle. 283 * 284 * Called for non-linked entries, with callouts and 285 * other AF-specific cleanups performed. 286 * 287 * @lle must be passed WLOCK'ed 288 * 289 * Returns the number of held packets, if any, that were dropped. 290 */ 291 size_t 292 llentry_free(struct llentry *lle) 293 { 294 struct lltable *llt; 295 size_t pkts_dropped; 296 297 LLE_WLOCK_ASSERT(lle); 298 299 if ((lle->la_flags & LLE_LINKED) != 0) { 300 llt = lle->lle_tbl; 301 302 IF_AFDATA_WLOCK_ASSERT(llt->llt_ifp); 303 llt->llt_unlink_entry(lle); 304 } 305 306 pkts_dropped = lltable_drop_entry_queue(lle); 307 308 LLE_FREE_LOCKED(lle); 309 310 return (pkts_dropped); 311 } 312 313 /* 314 * (al)locate an llentry for address dst (equivalent to rtalloc for new-arp). 315 * 316 * If found the llentry * is returned referenced and unlocked. 317 */ 318 struct llentry * 319 llentry_alloc(struct ifnet *ifp, struct lltable *lt, 320 struct sockaddr_storage *dst) 321 { 322 struct llentry *la, *la_tmp; 323 324 IF_AFDATA_RLOCK(ifp); 325 la = lla_lookup(lt, LLE_EXCLUSIVE, (struct sockaddr *)dst); 326 IF_AFDATA_RUNLOCK(ifp); 327 328 if (la != NULL) { 329 LLE_ADDREF(la); 330 LLE_WUNLOCK(la); 331 return (la); 332 } 333 334 if ((ifp->if_flags & (IFF_NOARP | IFF_STATICARP)) == 0) { 335 la = lltable_alloc_entry(lt, 0, (struct sockaddr *)dst); 336 if (la == NULL) 337 return (NULL); 338 IF_AFDATA_WLOCK(ifp); 339 LLE_WLOCK(la); 340 /* Prefer any existing LLE over newly-created one */ 341 la_tmp = lla_lookup(lt, LLE_EXCLUSIVE, (struct sockaddr *)dst); 342 if (la_tmp == NULL) 343 lltable_link_entry(lt, la); 344 IF_AFDATA_WUNLOCK(ifp); 345 if (la_tmp != NULL) { 346 lltable_free_entry(lt, la); 347 la = la_tmp; 348 } 349 LLE_ADDREF(la); 350 LLE_WUNLOCK(la); 351 } 352 353 return (la); 354 } 355 356 /* 357 * Free all entries from given table and free itself. 358 */ 359 360 static int 361 lltable_free_cb(struct lltable *llt, struct llentry *lle, void *farg) 362 { 363 struct llentries *dchain; 364 365 dchain = (struct llentries *)farg; 366 367 LLE_WLOCK(lle); 368 LIST_INSERT_HEAD(dchain, lle, lle_chain); 369 370 return (0); 371 } 372 373 /* 374 * Free all entries from given table and free itself. 375 */ 376 void 377 lltable_free(struct lltable *llt) 378 { 379 struct llentry *lle, *next; 380 struct llentries dchain; 381 382 KASSERT(llt != NULL, ("%s: llt is NULL", __func__)); 383 384 lltable_unlink(llt); 385 386 LIST_INIT(&dchain); 387 IF_AFDATA_WLOCK(llt->llt_ifp); 388 /* Push all lles to @dchain */ 389 lltable_foreach_lle(llt, lltable_free_cb, &dchain); 390 llentries_unlink(llt, &dchain); 391 IF_AFDATA_WUNLOCK(llt->llt_ifp); 392 393 LIST_FOREACH_SAFE(lle, &dchain, lle_chain, next) { 394 if (callout_stop(&lle->lle_timer)) 395 LLE_REMREF(lle); 396 llentry_free(lle); 397 } 398 399 llt->llt_free_tbl(llt); 400 } 401 402 #if 0 403 void 404 lltable_drain(int af) 405 { 406 struct lltable *llt; 407 struct llentry *lle; 408 register int i; 409 410 LLTABLE_RLOCK(); 411 SLIST_FOREACH(llt, &V_lltables, llt_link) { 412 if (llt->llt_af != af) 413 continue; 414 415 for (i=0; i < llt->llt_hsize; i++) { 416 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 417 LLE_WLOCK(lle); 418 if (lle->la_hold) { 419 m_freem(lle->la_hold); 420 lle->la_hold = NULL; 421 } 422 LLE_WUNLOCK(lle); 423 } 424 } 425 } 426 LLTABLE_RUNLOCK(); 427 } 428 #endif 429 430 void 431 lltable_prefix_free(int af, struct sockaddr *prefix, struct sockaddr *mask, 432 u_int flags) 433 { 434 struct lltable *llt; 435 436 LLTABLE_RLOCK(); 437 SLIST_FOREACH(llt, &V_lltables, llt_link) { 438 if (llt->llt_af != af) 439 continue; 440 441 llt->llt_prefix_free(llt, prefix, mask, flags); 442 } 443 LLTABLE_RUNLOCK(); 444 } 445 446 struct lltable * 447 lltable_allocate_htbl(uint32_t hsize) 448 { 449 struct lltable *llt; 450 int i; 451 452 llt = malloc(sizeof(struct lltable), M_LLTABLE, M_WAITOK | M_ZERO); 453 llt->llt_hsize = hsize; 454 llt->lle_head = malloc(sizeof(struct llentries) * hsize, 455 M_LLTABLE, M_WAITOK | M_ZERO); 456 457 for (i = 0; i < llt->llt_hsize; i++) 458 LIST_INIT(&llt->lle_head[i]); 459 460 /* Set some default callbacks */ 461 llt->llt_link_entry = htable_link_entry; 462 llt->llt_unlink_entry = htable_unlink_entry; 463 llt->llt_prefix_free = htable_prefix_free; 464 llt->llt_foreach_entry = htable_foreach_lle; 465 llt->llt_free_tbl = htable_free_tbl; 466 467 return (llt); 468 } 469 470 /* 471 * Links lltable to global llt list. 472 */ 473 void 474 lltable_link(struct lltable *llt) 475 { 476 477 LLTABLE_WLOCK(); 478 SLIST_INSERT_HEAD(&V_lltables, llt, llt_link); 479 LLTABLE_WUNLOCK(); 480 } 481 482 static void 483 lltable_unlink(struct lltable *llt) 484 { 485 486 LLTABLE_WLOCK(); 487 SLIST_REMOVE(&V_lltables, llt, lltable, llt_link); 488 LLTABLE_WUNLOCK(); 489 490 } 491 492 /* 493 * External methods used by lltable consumers 494 */ 495 496 int 497 lltable_foreach_lle(struct lltable *llt, llt_foreach_cb_t *f, void *farg) 498 { 499 500 return (llt->llt_foreach_entry(llt, f, farg)); 501 } 502 503 struct llentry * 504 lltable_alloc_entry(struct lltable *llt, u_int flags, 505 const struct sockaddr *l3addr) 506 { 507 508 return (llt->llt_alloc_entry(llt, flags, l3addr)); 509 } 510 511 void 512 lltable_free_entry(struct lltable *llt, struct llentry *lle) 513 { 514 515 llt->llt_free_entry(llt, lle); 516 } 517 518 void 519 lltable_link_entry(struct lltable *llt, struct llentry *lle) 520 { 521 522 llt->llt_link_entry(llt, lle); 523 } 524 525 void 526 lltable_unlink_entry(struct lltable *llt, struct llentry *lle) 527 { 528 529 llt->llt_unlink_entry(lle); 530 } 531 532 void 533 lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa) 534 { 535 struct lltable *llt; 536 537 llt = lle->lle_tbl; 538 llt->llt_fill_sa_entry(lle, sa); 539 } 540 541 struct ifnet * 542 lltable_get_ifp(const struct lltable *llt) 543 { 544 545 return (llt->llt_ifp); 546 } 547 548 int 549 lltable_get_af(const struct lltable *llt) 550 { 551 552 return (llt->llt_af); 553 } 554 555 /* 556 * Called in route_output when rtm_flags contains RTF_LLDATA. 557 */ 558 int 559 lla_rt_output(struct rt_msghdr *rtm, struct rt_addrinfo *info) 560 { 561 struct sockaddr_dl *dl = 562 (struct sockaddr_dl *)info->rti_info[RTAX_GATEWAY]; 563 struct sockaddr *dst = (struct sockaddr *)info->rti_info[RTAX_DST]; 564 struct ifnet *ifp; 565 struct lltable *llt; 566 struct llentry *lle, *lle_tmp; 567 u_int laflags = 0; 568 int error; 569 570 KASSERT(dl != NULL && dl->sdl_family == AF_LINK, 571 ("%s: invalid dl\n", __func__)); 572 573 ifp = ifnet_byindex(dl->sdl_index); 574 if (ifp == NULL) { 575 log(LOG_INFO, "%s: invalid ifp (sdl_index %d)\n", 576 __func__, dl->sdl_index); 577 return EINVAL; 578 } 579 580 /* XXX linked list may be too expensive */ 581 LLTABLE_RLOCK(); 582 SLIST_FOREACH(llt, &V_lltables, llt_link) { 583 if (llt->llt_af == dst->sa_family && 584 llt->llt_ifp == ifp) 585 break; 586 } 587 LLTABLE_RUNLOCK(); 588 KASSERT(llt != NULL, ("Yep, ugly hacks are bad\n")); 589 590 error = 0; 591 592 switch (rtm->rtm_type) { 593 case RTM_ADD: 594 /* Add static LLE */ 595 laflags = 0; 596 if (rtm->rtm_rmx.rmx_expire == 0) 597 laflags = LLE_STATIC; 598 lle = lltable_alloc_entry(llt, laflags, dst); 599 if (lle == NULL) 600 return (ENOMEM); 601 602 bcopy(LLADDR(dl), &lle->ll_addr, ifp->if_addrlen); 603 if ((rtm->rtm_flags & RTF_ANNOUNCE)) 604 lle->la_flags |= LLE_PUB; 605 lle->la_flags |= LLE_VALID; 606 lle->la_expire = rtm->rtm_rmx.rmx_expire; 607 608 laflags = lle->la_flags; 609 610 /* Try to link new entry */ 611 lle_tmp = NULL; 612 IF_AFDATA_WLOCK(ifp); 613 LLE_WLOCK(lle); 614 lle_tmp = lla_lookup(llt, LLE_EXCLUSIVE, dst); 615 if (lle_tmp != NULL) { 616 /* Check if we are trying to replace immutable entry */ 617 if ((lle_tmp->la_flags & LLE_IFADDR) != 0) { 618 IF_AFDATA_WUNLOCK(ifp); 619 LLE_WUNLOCK(lle_tmp); 620 lltable_free_entry(llt, lle); 621 return (EPERM); 622 } 623 /* Unlink existing entry from table */ 624 lltable_unlink_entry(llt, lle_tmp); 625 } 626 lltable_link_entry(llt, lle); 627 IF_AFDATA_WUNLOCK(ifp); 628 629 if (lle_tmp != NULL) { 630 EVENTHANDLER_INVOKE(lle_event, lle_tmp,LLENTRY_EXPIRED); 631 lltable_free_entry(llt, lle_tmp); 632 } 633 634 /* 635 * By invoking LLE handler here we might get 636 * two events on static LLE entry insertion 637 * in routing socket. However, since we might have 638 * other subscribers we need to generate this event. 639 */ 640 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_RESOLVED); 641 LLE_WUNLOCK(lle); 642 #ifdef INET 643 /* gratuitous ARP */ 644 if ((laflags & LLE_PUB) && dst->sa_family == AF_INET) 645 arprequest(ifp, 646 &((struct sockaddr_in *)dst)->sin_addr, 647 &((struct sockaddr_in *)dst)->sin_addr, 648 (u_char *)LLADDR(dl)); 649 #endif 650 651 break; 652 653 case RTM_DELETE: 654 IF_AFDATA_WLOCK(ifp); 655 error = lla_delete(llt, 0, dst); 656 IF_AFDATA_WUNLOCK(ifp); 657 return (error == 0 ? 0 : ENOENT); 658 659 default: 660 error = EINVAL; 661 } 662 663 return (error); 664 } 665 666 static void 667 vnet_lltable_init() 668 { 669 670 SLIST_INIT(&V_lltables); 671 } 672 VNET_SYSINIT(vnet_lltable_init, SI_SUB_PSEUDO, SI_ORDER_FIRST, 673 vnet_lltable_init, NULL); 674 675 #ifdef DDB 676 struct llentry_sa { 677 struct llentry base; 678 struct sockaddr l3_addr; 679 }; 680 681 static void 682 llatbl_lle_show(struct llentry_sa *la) 683 { 684 struct llentry *lle; 685 uint8_t octet[6]; 686 687 lle = &la->base; 688 db_printf("lle=%p\n", lle); 689 db_printf(" lle_next=%p\n", lle->lle_next.le_next); 690 db_printf(" lle_lock=%p\n", &lle->lle_lock); 691 db_printf(" lle_tbl=%p\n", lle->lle_tbl); 692 db_printf(" lle_head=%p\n", lle->lle_head); 693 db_printf(" la_hold=%p\n", lle->la_hold); 694 db_printf(" la_numheld=%d\n", lle->la_numheld); 695 db_printf(" la_expire=%ju\n", (uintmax_t)lle->la_expire); 696 db_printf(" la_flags=0x%04x\n", lle->la_flags); 697 db_printf(" la_asked=%u\n", lle->la_asked); 698 db_printf(" la_preempt=%u\n", lle->la_preempt); 699 db_printf(" ln_byhint=%u\n", lle->ln_byhint); 700 db_printf(" ln_state=%d\n", lle->ln_state); 701 db_printf(" ln_router=%u\n", lle->ln_router); 702 db_printf(" ln_ntick=%ju\n", (uintmax_t)lle->ln_ntick); 703 db_printf(" lle_refcnt=%d\n", lle->lle_refcnt); 704 bcopy(&lle->ll_addr.mac16, octet, sizeof(octet)); 705 db_printf(" ll_addr=%02x:%02x:%02x:%02x:%02x:%02x\n", 706 octet[0], octet[1], octet[2], octet[3], octet[4], octet[5]); 707 db_printf(" lle_timer=%p\n", &lle->lle_timer); 708 709 switch (la->l3_addr.sa_family) { 710 #ifdef INET 711 case AF_INET: 712 { 713 struct sockaddr_in *sin; 714 char l3s[INET_ADDRSTRLEN]; 715 716 sin = (struct sockaddr_in *)&la->l3_addr; 717 inet_ntoa_r(sin->sin_addr, l3s); 718 db_printf(" l3_addr=%s\n", l3s); 719 break; 720 } 721 #endif 722 #ifdef INET6 723 case AF_INET6: 724 { 725 struct sockaddr_in6 *sin6; 726 char l3s[INET6_ADDRSTRLEN]; 727 728 sin6 = (struct sockaddr_in6 *)&la->l3_addr; 729 ip6_sprintf(l3s, &sin6->sin6_addr); 730 db_printf(" l3_addr=%s\n", l3s); 731 break; 732 } 733 #endif 734 default: 735 db_printf(" l3_addr=N/A (af=%d)\n", la->l3_addr.sa_family); 736 break; 737 } 738 } 739 740 DB_SHOW_COMMAND(llentry, db_show_llentry) 741 { 742 743 if (!have_addr) { 744 db_printf("usage: show llentry <struct llentry *>\n"); 745 return; 746 } 747 748 llatbl_lle_show((struct llentry_sa *)addr); 749 } 750 751 static void 752 llatbl_llt_show(struct lltable *llt) 753 { 754 int i; 755 struct llentry *lle; 756 757 db_printf("llt=%p llt_af=%d llt_ifp=%p\n", 758 llt, llt->llt_af, llt->llt_ifp); 759 760 for (i = 0; i < llt->llt_hsize; i++) { 761 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 762 763 llatbl_lle_show((struct llentry_sa *)lle); 764 if (db_pager_quit) 765 return; 766 } 767 } 768 } 769 770 DB_SHOW_COMMAND(lltable, db_show_lltable) 771 { 772 773 if (!have_addr) { 774 db_printf("usage: show lltable <struct lltable *>\n"); 775 return; 776 } 777 778 llatbl_llt_show((struct lltable *)addr); 779 } 780 781 DB_SHOW_ALL_COMMAND(lltables, db_show_all_lltables) 782 { 783 VNET_ITERATOR_DECL(vnet_iter); 784 struct lltable *llt; 785 786 VNET_FOREACH(vnet_iter) { 787 CURVNET_SET_QUIET(vnet_iter); 788 #ifdef VIMAGE 789 db_printf("vnet=%p\n", curvnet); 790 #endif 791 SLIST_FOREACH(llt, &V_lltables, llt_link) { 792 db_printf("llt=%p llt_af=%d llt_ifp=%p(%s)\n", 793 llt, llt->llt_af, llt->llt_ifp, 794 (llt->llt_ifp != NULL) ? 795 llt->llt_ifp->if_xname : "?"); 796 if (have_addr && addr != 0) /* verbose */ 797 llatbl_llt_show(llt); 798 if (db_pager_quit) { 799 CURVNET_RESTORE(); 800 return; 801 } 802 } 803 CURVNET_RESTORE(); 804 } 805 } 806 #endif 807