1 /*- 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)if.c 8.5 (Berkeley) 1/9/95 30 * $FreeBSD$ 31 */ 32 33 #include "opt_compat.h" 34 #include "opt_inet6.h" 35 #include "opt_inet.h" 36 #include "opt_carp.h" 37 #include "opt_ddb.h" 38 39 #include <sys/param.h> 40 #include <sys/types.h> 41 #include <sys/conf.h> 42 #include <sys/malloc.h> 43 #include <sys/sbuf.h> 44 #include <sys/bus.h> 45 #include <sys/mbuf.h> 46 #include <sys/systm.h> 47 #include <sys/priv.h> 48 #include <sys/proc.h> 49 #include <sys/socket.h> 50 #include <sys/socketvar.h> 51 #include <sys/protosw.h> 52 #include <sys/kernel.h> 53 #include <sys/lock.h> 54 #include <sys/refcount.h> 55 #include <sys/module.h> 56 #include <sys/rwlock.h> 57 #include <sys/sockio.h> 58 #include <sys/syslog.h> 59 #include <sys/sysctl.h> 60 #include <sys/taskqueue.h> 61 #include <sys/domain.h> 62 #include <sys/jail.h> 63 #include <machine/stdarg.h> 64 #include <vm/uma.h> 65 66 #ifdef DDB 67 #include <ddb/ddb.h> 68 #endif 69 70 #include <net/if.h> 71 #include <net/if_arp.h> 72 #include <net/if_clone.h> 73 #include <net/if_dl.h> 74 #include <net/if_types.h> 75 #include <net/if_var.h> 76 #include <net/radix.h> 77 #include <net/route.h> 78 #include <net/vnet.h> 79 80 #if defined(INET) || defined(INET6) 81 /*XXX*/ 82 #include <netinet/in.h> 83 #include <netinet/in_var.h> 84 #ifdef INET6 85 #include <netinet6/in6_var.h> 86 #include <netinet6/in6_ifattach.h> 87 #endif 88 #endif 89 #ifdef INET 90 #include <netinet/if_ether.h> 91 #endif 92 #if defined(INET) || defined(INET6) 93 #ifdef DEV_CARP 94 #include <netinet/ip_carp.h> 95 #endif 96 #endif 97 98 #include <security/mac/mac_framework.h> 99 100 struct ifindex_entry { 101 struct ifnet *ife_ifnet; 102 }; 103 104 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers"); 105 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management"); 106 107 /* Log link state change events */ 108 static int log_link_state_change = 1; 109 110 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW, 111 &log_link_state_change, 0, 112 "log interface link state change events"); 113 114 /* Interface description */ 115 static unsigned int ifdescr_maxlen = 1024; 116 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW, 117 &ifdescr_maxlen, 0, 118 "administrative maximum length for interface description"); 119 120 MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions"); 121 122 /* global sx for non-critical path ifdescr */ 123 static struct sx ifdescr_sx; 124 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr"); 125 126 void (*bstp_linkstate_p)(struct ifnet *ifp, int state); 127 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state); 128 void (*lagg_linkstate_p)(struct ifnet *ifp, int state); 129 130 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL; 131 132 /* 133 * XXX: Style; these should be sorted alphabetically, and unprototyped 134 * static functions should be prototyped. Currently they are sorted by 135 * declaration order. 136 */ 137 static void if_attachdomain(void *); 138 static void if_attachdomain1(struct ifnet *); 139 static int ifconf(u_long, caddr_t); 140 static void if_freemulti(struct ifmultiaddr *); 141 static void if_init(void *); 142 static void if_grow(void); 143 static void if_route(struct ifnet *, int flag, int fam); 144 static int if_setflag(struct ifnet *, int, int, int *, int); 145 static int if_transmit(struct ifnet *ifp, struct mbuf *m); 146 static void if_unroute(struct ifnet *, int flag, int fam); 147 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 148 static int if_rtdel(struct radix_node *, void *); 149 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *); 150 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int); 151 static void do_link_state_change(void *, int); 152 static int if_getgroup(struct ifgroupreq *, struct ifnet *); 153 static int if_getgroupmembers(struct ifgroupreq *); 154 static void if_delgroups(struct ifnet *); 155 static void if_attach_internal(struct ifnet *, int); 156 static void if_detach_internal(struct ifnet *, int); 157 158 #ifdef INET6 159 /* 160 * XXX: declare here to avoid to include many inet6 related files.. 161 * should be more generalized? 162 */ 163 extern void nd6_setmtu(struct ifnet *); 164 #endif 165 166 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */ 167 VNET_DEFINE(struct ifgrouphead, ifg_head); 168 VNET_DEFINE(int, if_index); 169 static VNET_DEFINE(int, if_indexlim) = 8; 170 171 /* Table of ifnet by index. */ 172 static VNET_DEFINE(struct ifindex_entry *, ifindex_table); 173 174 #define V_if_indexlim VNET(if_indexlim) 175 #define V_ifindex_table VNET(ifindex_table) 176 177 int ifqmaxlen = IFQ_MAXLEN; 178 179 /* 180 * The global network interface list (V_ifnet) and related state (such as 181 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and 182 * an rwlock. Either may be acquired shared to stablize the list, but both 183 * must be acquired writable to modify the list. This model allows us to 184 * both stablize the interface list during interrupt thread processing, but 185 * also to stablize it over long-running ioctls, without introducing priority 186 * inversions and deadlocks. 187 */ 188 struct rwlock ifnet_rwlock; 189 struct sx ifnet_sxlock; 190 191 /* 192 * The allocation of network interfaces is a rather non-atomic affair; we 193 * need to select an index before we are ready to expose the interface for 194 * use, so will use this pointer value to indicate reservation. 195 */ 196 #define IFNET_HOLD (void *)(uintptr_t)(-1) 197 198 static if_com_alloc_t *if_com_alloc[256]; 199 static if_com_free_t *if_com_free[256]; 200 201 MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals"); 202 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 203 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 204 205 struct ifnet * 206 ifnet_byindex_locked(u_short idx) 207 { 208 209 if (idx > V_if_index) 210 return (NULL); 211 if (V_ifindex_table[idx].ife_ifnet == IFNET_HOLD) 212 return (NULL); 213 return (V_ifindex_table[idx].ife_ifnet); 214 } 215 216 struct ifnet * 217 ifnet_byindex(u_short idx) 218 { 219 struct ifnet *ifp; 220 221 IFNET_RLOCK_NOSLEEP(); 222 ifp = ifnet_byindex_locked(idx); 223 IFNET_RUNLOCK_NOSLEEP(); 224 return (ifp); 225 } 226 227 struct ifnet * 228 ifnet_byindex_ref(u_short idx) 229 { 230 struct ifnet *ifp; 231 232 IFNET_RLOCK_NOSLEEP(); 233 ifp = ifnet_byindex_locked(idx); 234 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) { 235 IFNET_RUNLOCK_NOSLEEP(); 236 return (NULL); 237 } 238 if_ref(ifp); 239 IFNET_RUNLOCK_NOSLEEP(); 240 return (ifp); 241 } 242 243 /* 244 * Allocate an ifindex array entry; return 0 on success or an error on 245 * failure. 246 */ 247 static int 248 ifindex_alloc_locked(u_short *idxp) 249 { 250 u_short idx; 251 252 IFNET_WLOCK_ASSERT(); 253 254 /* 255 * Try to find an empty slot below V_if_index. If we fail, take the 256 * next slot. 257 */ 258 for (idx = 1; idx <= V_if_index; idx++) { 259 if (V_ifindex_table[idx].ife_ifnet == NULL) 260 break; 261 } 262 263 /* Catch if_index overflow. */ 264 if (idx < 1) 265 return (ENOSPC); 266 if (idx > V_if_index) 267 V_if_index = idx; 268 if (V_if_index >= V_if_indexlim) 269 if_grow(); 270 *idxp = idx; 271 return (0); 272 } 273 274 static void 275 ifindex_free_locked(u_short idx) 276 { 277 278 IFNET_WLOCK_ASSERT(); 279 280 V_ifindex_table[idx].ife_ifnet = NULL; 281 while (V_if_index > 0 && 282 V_ifindex_table[V_if_index].ife_ifnet == NULL) 283 V_if_index--; 284 } 285 286 static void 287 ifindex_free(u_short idx) 288 { 289 290 IFNET_WLOCK(); 291 ifindex_free_locked(idx); 292 IFNET_WUNLOCK(); 293 } 294 295 static void 296 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp) 297 { 298 299 IFNET_WLOCK_ASSERT(); 300 301 V_ifindex_table[idx].ife_ifnet = ifp; 302 } 303 304 static void 305 ifnet_setbyindex(u_short idx, struct ifnet *ifp) 306 { 307 308 IFNET_WLOCK(); 309 ifnet_setbyindex_locked(idx, ifp); 310 IFNET_WUNLOCK(); 311 } 312 313 struct ifaddr * 314 ifaddr_byindex(u_short idx) 315 { 316 struct ifaddr *ifa; 317 318 IFNET_RLOCK_NOSLEEP(); 319 ifa = ifnet_byindex_locked(idx)->if_addr; 320 if (ifa != NULL) 321 ifa_ref(ifa); 322 IFNET_RUNLOCK_NOSLEEP(); 323 return (ifa); 324 } 325 326 /* 327 * Network interface utility routines. 328 * 329 * Routines with ifa_ifwith* names take sockaddr *'s as 330 * parameters. 331 */ 332 333 static void 334 vnet_if_init(const void *unused __unused) 335 { 336 337 TAILQ_INIT(&V_ifnet); 338 TAILQ_INIT(&V_ifg_head); 339 if_grow(); /* create initial table */ 340 vnet_if_clone_init(); 341 } 342 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_FIRST, vnet_if_init, 343 NULL); 344 345 /* ARGSUSED*/ 346 static void 347 if_init(void *dummy __unused) 348 { 349 350 IFNET_LOCK_INIT(); 351 if_clone_init(); 352 } 353 SYSINIT(interfaces, SI_SUB_INIT_IF, SI_ORDER_SECOND, if_init, NULL); 354 355 356 #ifdef VIMAGE 357 static void 358 vnet_if_uninit(const void *unused __unused) 359 { 360 361 VNET_ASSERT(TAILQ_EMPTY(&V_ifnet)); 362 VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head)); 363 364 free((caddr_t)V_ifindex_table, M_IFNET); 365 } 366 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST, 367 vnet_if_uninit, NULL); 368 #endif 369 370 static void 371 if_grow(void) 372 { 373 u_int n; 374 struct ifindex_entry *e; 375 376 V_if_indexlim <<= 1; 377 n = V_if_indexlim * sizeof(*e); 378 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO); 379 if (V_ifindex_table != NULL) { 380 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2); 381 free((caddr_t)V_ifindex_table, M_IFNET); 382 } 383 V_ifindex_table = e; 384 } 385 386 /* 387 * Allocate a struct ifnet and an index for an interface. A layer 2 388 * common structure will also be allocated if an allocation routine is 389 * registered for the passed type. 390 */ 391 struct ifnet * 392 if_alloc(u_char type) 393 { 394 struct ifnet *ifp; 395 u_short idx; 396 397 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO); 398 IFNET_WLOCK(); 399 if (ifindex_alloc_locked(&idx) != 0) { 400 IFNET_WUNLOCK(); 401 free(ifp, M_IFNET); 402 return (NULL); 403 } 404 ifnet_setbyindex_locked(idx, IFNET_HOLD); 405 IFNET_WUNLOCK(); 406 ifp->if_index = idx; 407 ifp->if_type = type; 408 ifp->if_alloctype = type; 409 if (if_com_alloc[type] != NULL) { 410 ifp->if_l2com = if_com_alloc[type](type, ifp); 411 if (ifp->if_l2com == NULL) { 412 free(ifp, M_IFNET); 413 ifindex_free(idx); 414 return (NULL); 415 } 416 } 417 418 IF_ADDR_LOCK_INIT(ifp); 419 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp); 420 ifp->if_afdata_initialized = 0; 421 IF_AFDATA_LOCK_INIT(ifp); 422 TAILQ_INIT(&ifp->if_addrhead); 423 TAILQ_INIT(&ifp->if_prefixhead); 424 TAILQ_INIT(&ifp->if_multiaddrs); 425 TAILQ_INIT(&ifp->if_groups); 426 #ifdef MAC 427 mac_ifnet_init(ifp); 428 #endif 429 ifq_init(&ifp->if_snd, ifp); 430 431 refcount_init(&ifp->if_refcount, 1); /* Index reference. */ 432 ifnet_setbyindex(ifp->if_index, ifp); 433 return (ifp); 434 } 435 436 /* 437 * Do the actual work of freeing a struct ifnet, associated index, and layer 438 * 2 common structure. This call is made when the last reference to an 439 * interface is released. 440 */ 441 static void 442 if_free_internal(struct ifnet *ifp) 443 { 444 445 KASSERT((ifp->if_flags & IFF_DYING), 446 ("if_free_internal: interface not dying")); 447 448 IFNET_WLOCK(); 449 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index), 450 ("%s: freeing unallocated ifnet", ifp->if_xname)); 451 452 ifindex_free_locked(ifp->if_index); 453 IFNET_WUNLOCK(); 454 455 if (if_com_free[ifp->if_alloctype] != NULL) 456 if_com_free[ifp->if_alloctype](ifp->if_l2com, 457 ifp->if_alloctype); 458 459 #ifdef MAC 460 mac_ifnet_destroy(ifp); 461 #endif /* MAC */ 462 if (ifp->if_description != NULL) 463 free(ifp->if_description, M_IFDESCR); 464 IF_AFDATA_DESTROY(ifp); 465 IF_ADDR_LOCK_DESTROY(ifp); 466 ifq_delete(&ifp->if_snd); 467 free(ifp, M_IFNET); 468 } 469 470 /* 471 * This version should only be called by intefaces that switch their type 472 * after calling if_alloc(). if_free_type() will go away again now that we 473 * have if_alloctype to cache the original allocation type. For now, assert 474 * that they match, since we require that in practice. 475 */ 476 void 477 if_free_type(struct ifnet *ifp, u_char type) 478 { 479 480 KASSERT(ifp->if_alloctype == type, 481 ("if_free_type: type (%d) != alloctype (%d)", type, 482 ifp->if_alloctype)); 483 484 ifp->if_flags |= IFF_DYING; /* XXX: Locking */ 485 if (!refcount_release(&ifp->if_refcount)) 486 return; 487 if_free_internal(ifp); 488 } 489 490 /* 491 * This is the normal version of if_free(), used by device drivers to free a 492 * detached network interface. The contents of if_free_type() will move into 493 * here when if_free_type() goes away. 494 */ 495 void 496 if_free(struct ifnet *ifp) 497 { 498 499 if_free_type(ifp, ifp->if_alloctype); 500 } 501 502 /* 503 * Interfaces to keep an ifnet type-stable despite the possibility of the 504 * driver calling if_free(). If there are additional references, we defer 505 * freeing the underlying data structure. 506 */ 507 void 508 if_ref(struct ifnet *ifp) 509 { 510 511 /* We don't assert the ifnet list lock here, but arguably should. */ 512 refcount_acquire(&ifp->if_refcount); 513 } 514 515 void 516 if_rele(struct ifnet *ifp) 517 { 518 519 if (!refcount_release(&ifp->if_refcount)) 520 return; 521 if_free_internal(ifp); 522 } 523 524 void 525 ifq_init(struct ifaltq *ifq, struct ifnet *ifp) 526 { 527 528 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF); 529 530 if (ifq->ifq_maxlen == 0) 531 ifq->ifq_maxlen = ifqmaxlen; 532 533 ifq->altq_type = 0; 534 ifq->altq_disc = NULL; 535 ifq->altq_flags &= ALTQF_CANTCHANGE; 536 ifq->altq_tbr = NULL; 537 ifq->altq_ifp = ifp; 538 } 539 540 void 541 ifq_delete(struct ifaltq *ifq) 542 { 543 mtx_destroy(&ifq->ifq_mtx); 544 } 545 546 /* 547 * Perform generic interface initalization tasks and attach the interface 548 * to the list of "active" interfaces. If vmove flag is set on entry 549 * to if_attach_internal(), perform only a limited subset of initialization 550 * tasks, given that we are moving from one vnet to another an ifnet which 551 * has already been fully initialized. 552 * 553 * XXX: 554 * - The decision to return void and thus require this function to 555 * succeed is questionable. 556 * - We should probably do more sanity checking. For instance we don't 557 * do anything to insure if_xname is unique or non-empty. 558 */ 559 void 560 if_attach(struct ifnet *ifp) 561 { 562 563 if_attach_internal(ifp, 0); 564 } 565 566 static void 567 if_attach_internal(struct ifnet *ifp, int vmove) 568 { 569 unsigned socksize, ifasize; 570 int namelen, masklen; 571 struct sockaddr_dl *sdl; 572 struct ifaddr *ifa; 573 574 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index)) 575 panic ("%s: BUG: if_attach called without if_alloc'd input()\n", 576 ifp->if_xname); 577 578 #ifdef VIMAGE 579 ifp->if_vnet = curvnet; 580 if (ifp->if_home_vnet == NULL) 581 ifp->if_home_vnet = curvnet; 582 #endif 583 584 if_addgroup(ifp, IFG_ALL); 585 586 getmicrotime(&ifp->if_lastchange); 587 ifp->if_data.ifi_epoch = time_uptime; 588 ifp->if_data.ifi_datalen = sizeof(struct if_data); 589 590 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) || 591 (ifp->if_transmit != NULL && ifp->if_qflush != NULL), 592 ("transmit and qflush must both either be set or both be NULL")); 593 if (ifp->if_transmit == NULL) { 594 ifp->if_transmit = if_transmit; 595 ifp->if_qflush = if_qflush; 596 } 597 598 if (!vmove) { 599 #ifdef MAC 600 mac_ifnet_create(ifp); 601 #endif 602 603 /* 604 * Create a Link Level name for this device. 605 */ 606 namelen = strlen(ifp->if_xname); 607 /* 608 * Always save enough space for any possiable name so we 609 * can do a rename in place later. 610 */ 611 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ; 612 socksize = masklen + ifp->if_addrlen; 613 if (socksize < sizeof(*sdl)) 614 socksize = sizeof(*sdl); 615 socksize = roundup2(socksize, sizeof(long)); 616 ifasize = sizeof(*ifa) + 2 * socksize; 617 ifa = malloc(ifasize, M_IFADDR, M_WAITOK | M_ZERO); 618 ifa_init(ifa); 619 sdl = (struct sockaddr_dl *)(ifa + 1); 620 sdl->sdl_len = socksize; 621 sdl->sdl_family = AF_LINK; 622 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 623 sdl->sdl_nlen = namelen; 624 sdl->sdl_index = ifp->if_index; 625 sdl->sdl_type = ifp->if_type; 626 ifp->if_addr = ifa; 627 ifa->ifa_ifp = ifp; 628 ifa->ifa_rtrequest = link_rtrequest; 629 ifa->ifa_addr = (struct sockaddr *)sdl; 630 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 631 ifa->ifa_netmask = (struct sockaddr *)sdl; 632 sdl->sdl_len = masklen; 633 while (namelen != 0) 634 sdl->sdl_data[--namelen] = 0xff; 635 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link); 636 /* Reliably crash if used uninitialized. */ 637 ifp->if_broadcastaddr = NULL; 638 } 639 #ifdef VIMAGE 640 else { 641 /* 642 * Update the interface index in the link layer address 643 * of the interface. 644 */ 645 for (ifa = ifp->if_addr; ifa != NULL; 646 ifa = TAILQ_NEXT(ifa, ifa_link)) { 647 if (ifa->ifa_addr->sa_family == AF_LINK) { 648 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 649 sdl->sdl_index = ifp->if_index; 650 } 651 } 652 } 653 #endif 654 655 IFNET_WLOCK(); 656 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link); 657 #ifdef VIMAGE 658 curvnet->vnet_ifcnt++; 659 #endif 660 IFNET_WUNLOCK(); 661 662 if (domain_init_status >= 2) 663 if_attachdomain1(ifp); 664 665 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 666 if (IS_DEFAULT_VNET(curvnet)) 667 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 668 669 /* Announce the interface. */ 670 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 671 } 672 673 static void 674 if_attachdomain(void *dummy) 675 { 676 struct ifnet *ifp; 677 int s; 678 679 s = splnet(); 680 TAILQ_FOREACH(ifp, &V_ifnet, if_link) 681 if_attachdomain1(ifp); 682 splx(s); 683 } 684 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND, 685 if_attachdomain, NULL); 686 687 static void 688 if_attachdomain1(struct ifnet *ifp) 689 { 690 struct domain *dp; 691 int s; 692 693 s = splnet(); 694 695 /* 696 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we 697 * cannot lock ifp->if_afdata initialization, entirely. 698 */ 699 if (IF_AFDATA_TRYLOCK(ifp) == 0) { 700 splx(s); 701 return; 702 } 703 if (ifp->if_afdata_initialized >= domain_init_status) { 704 IF_AFDATA_UNLOCK(ifp); 705 splx(s); 706 printf("if_attachdomain called more than once on %s\n", 707 ifp->if_xname); 708 return; 709 } 710 ifp->if_afdata_initialized = domain_init_status; 711 IF_AFDATA_UNLOCK(ifp); 712 713 /* address family dependent data region */ 714 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 715 for (dp = domains; dp; dp = dp->dom_next) { 716 if (dp->dom_ifattach) 717 ifp->if_afdata[dp->dom_family] = 718 (*dp->dom_ifattach)(ifp); 719 } 720 721 splx(s); 722 } 723 724 /* 725 * Remove any unicast or broadcast network addresses from an interface. 726 */ 727 void 728 if_purgeaddrs(struct ifnet *ifp) 729 { 730 struct ifaddr *ifa, *next; 731 732 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) { 733 if (ifa->ifa_addr->sa_family == AF_LINK) 734 continue; 735 #ifdef INET 736 /* XXX: Ugly!! ad hoc just for INET */ 737 if (ifa->ifa_addr->sa_family == AF_INET) { 738 struct ifaliasreq ifr; 739 740 bzero(&ifr, sizeof(ifr)); 741 ifr.ifra_addr = *ifa->ifa_addr; 742 if (ifa->ifa_dstaddr) 743 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 744 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 745 NULL) == 0) 746 continue; 747 } 748 #endif /* INET */ 749 #ifdef INET6 750 if (ifa->ifa_addr->sa_family == AF_INET6) { 751 in6_purgeaddr(ifa); 752 /* ifp_addrhead is already updated */ 753 continue; 754 } 755 #endif /* INET6 */ 756 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 757 ifa_free(ifa); 758 } 759 } 760 761 /* 762 * Remove any multicast network addresses from an interface when an ifnet 763 * is going away. 764 */ 765 static void 766 if_purgemaddrs(struct ifnet *ifp) 767 { 768 struct ifmultiaddr *ifma; 769 struct ifmultiaddr *next; 770 771 IF_ADDR_LOCK(ifp); 772 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 773 if_delmulti_locked(ifp, ifma, 1); 774 IF_ADDR_UNLOCK(ifp); 775 } 776 777 /* 778 * Detach an interface, removing it from the list of "active" interfaces. 779 * If vmove flag is set on entry to if_detach_internal(), perform only a 780 * limited subset of cleanup tasks, given that we are moving an ifnet from 781 * one vnet to another, where it must be fully operational. 782 * 783 * XXXRW: There are some significant questions about event ordering, and 784 * how to prevent things from starting to use the interface during detach. 785 */ 786 void 787 if_detach(struct ifnet *ifp) 788 { 789 790 if_detach_internal(ifp, 0); 791 } 792 793 static void 794 if_detach_internal(struct ifnet *ifp, int vmove) 795 { 796 struct ifaddr *ifa; 797 struct radix_node_head *rnh; 798 int i, j; 799 struct domain *dp; 800 struct ifnet *iter; 801 int found = 0; 802 803 IFNET_WLOCK(); 804 TAILQ_FOREACH(iter, &V_ifnet, if_link) 805 if (iter == ifp) { 806 TAILQ_REMOVE(&V_ifnet, ifp, if_link); 807 found = 1; 808 break; 809 } 810 #ifdef VIMAGE 811 if (found) 812 curvnet->vnet_ifcnt--; 813 #endif 814 IFNET_WUNLOCK(); 815 if (!found) { 816 if (vmove) 817 panic("%s: ifp=%p not on the ifnet tailq %p", 818 __func__, ifp, &V_ifnet); 819 else 820 return; /* XXX this should panic as well? */ 821 } 822 823 /* 824 * Remove/wait for pending events. 825 */ 826 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 827 828 /* 829 * Remove routes and flush queues. 830 */ 831 if_down(ifp); 832 #ifdef ALTQ 833 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 834 altq_disable(&ifp->if_snd); 835 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 836 altq_detach(&ifp->if_snd); 837 #endif 838 839 if_purgeaddrs(ifp); 840 841 #ifdef INET 842 in_ifdetach(ifp); 843 #endif 844 845 #ifdef INET6 846 /* 847 * Remove all IPv6 kernel structs related to ifp. This should be done 848 * before removing routing entries below, since IPv6 interface direct 849 * routes are expected to be removed by the IPv6-specific kernel API. 850 * Otherwise, the kernel will detect some inconsistency and bark it. 851 */ 852 in6_ifdetach(ifp); 853 #endif 854 if_purgemaddrs(ifp); 855 856 if (!vmove) { 857 /* 858 * Prevent further calls into the device driver via ifnet. 859 */ 860 if_dead(ifp); 861 862 /* 863 * Remove link ifaddr pointer and maybe decrement if_index. 864 * Clean up all addresses. 865 */ 866 ifp->if_addr = NULL; 867 868 /* We can now free link ifaddr. */ 869 if (!TAILQ_EMPTY(&ifp->if_addrhead)) { 870 ifa = TAILQ_FIRST(&ifp->if_addrhead); 871 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 872 ifa_free(ifa); 873 } 874 } 875 876 /* 877 * Delete all remaining routes using this interface 878 * Unfortuneatly the only way to do this is to slog through 879 * the entire routing table looking for routes which point 880 * to this interface...oh well... 881 */ 882 for (i = 1; i <= AF_MAX; i++) { 883 for (j = 0; j < rt_numfibs; j++) { 884 rnh = rt_tables_get_rnh(j, i); 885 if (rnh == NULL) 886 continue; 887 RADIX_NODE_HEAD_LOCK(rnh); 888 (void) rnh->rnh_walktree(rnh, if_rtdel, ifp); 889 RADIX_NODE_HEAD_UNLOCK(rnh); 890 } 891 } 892 893 /* Announce that the interface is gone. */ 894 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 895 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 896 if (IS_DEFAULT_VNET(curvnet)) 897 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 898 if_delgroups(ifp); 899 900 IF_AFDATA_LOCK(ifp); 901 for (dp = domains; dp; dp = dp->dom_next) { 902 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 903 (*dp->dom_ifdetach)(ifp, 904 ifp->if_afdata[dp->dom_family]); 905 } 906 ifp->if_afdata_initialized = 0; 907 IF_AFDATA_UNLOCK(ifp); 908 } 909 910 #ifdef VIMAGE 911 /* 912 * if_vmove() performs a limited version of if_detach() in current 913 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg. 914 * An attempt is made to shrink if_index in current vnet, find an 915 * unused if_index in target vnet and calls if_grow() if necessary, 916 * and finally find an unused if_xname for the target vnet. 917 */ 918 void 919 if_vmove(struct ifnet *ifp, struct vnet *new_vnet) 920 { 921 u_short idx; 922 923 /* 924 * Detach from current vnet, but preserve LLADDR info, do not 925 * mark as dead etc. so that the ifnet can be reattached later. 926 */ 927 if_detach_internal(ifp, 1); 928 929 /* 930 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink 931 * the if_index for that vnet if possible. 932 * 933 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized, 934 * or we'd lock on one vnet and unlock on another. 935 */ 936 IFNET_WLOCK(); 937 ifindex_free_locked(ifp->if_index); 938 939 /* 940 * Switch to the context of the target vnet. 941 */ 942 CURVNET_SET_QUIET(new_vnet); 943 944 if (ifindex_alloc_locked(&idx) != 0) { 945 IFNET_WUNLOCK(); 946 panic("if_index overflow"); 947 } 948 ifp->if_index = idx; 949 ifnet_setbyindex_locked(ifp->if_index, ifp); 950 IFNET_WUNLOCK(); 951 952 if_attach_internal(ifp, 1); 953 954 CURVNET_RESTORE(); 955 } 956 957 /* 958 * Move an ifnet to or from another child prison/vnet, specified by the jail id. 959 */ 960 static int 961 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid) 962 { 963 struct prison *pr; 964 struct ifnet *difp; 965 966 /* Try to find the prison within our visibility. */ 967 sx_slock(&allprison_lock); 968 pr = prison_find_child(td->td_ucred->cr_prison, jid); 969 sx_sunlock(&allprison_lock); 970 if (pr == NULL) 971 return (ENXIO); 972 prison_hold_locked(pr); 973 mtx_unlock(&pr->pr_mtx); 974 975 /* Do not try to move the iface from and to the same prison. */ 976 if (pr->pr_vnet == ifp->if_vnet) { 977 prison_free(pr); 978 return (EEXIST); 979 } 980 981 /* Make sure the named iface does not exists in the dst. prison/vnet. */ 982 /* XXX Lock interfaces to avoid races. */ 983 CURVNET_SET_QUIET(pr->pr_vnet); 984 difp = ifunit(ifname); 985 CURVNET_RESTORE(); 986 if (difp != NULL) { 987 prison_free(pr); 988 return (EEXIST); 989 } 990 991 /* Move the interface into the child jail/vnet. */ 992 if_vmove(ifp, pr->pr_vnet); 993 994 /* Report the new if_xname back to the userland. */ 995 sprintf(ifname, "%s", ifp->if_xname); 996 997 prison_free(pr); 998 return (0); 999 } 1000 1001 static int 1002 if_vmove_reclaim(struct thread *td, char *ifname, int jid) 1003 { 1004 struct prison *pr; 1005 struct vnet *vnet_dst; 1006 struct ifnet *ifp; 1007 1008 /* Try to find the prison within our visibility. */ 1009 sx_slock(&allprison_lock); 1010 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1011 sx_sunlock(&allprison_lock); 1012 if (pr == NULL) 1013 return (ENXIO); 1014 prison_hold_locked(pr); 1015 mtx_unlock(&pr->pr_mtx); 1016 1017 /* Make sure the named iface exists in the source prison/vnet. */ 1018 CURVNET_SET(pr->pr_vnet); 1019 ifp = ifunit(ifname); /* XXX Lock to avoid races. */ 1020 if (ifp == NULL) { 1021 CURVNET_RESTORE(); 1022 prison_free(pr); 1023 return (ENXIO); 1024 } 1025 1026 /* Do not try to move the iface from and to the same prison. */ 1027 vnet_dst = TD_TO_VNET(td); 1028 if (vnet_dst == ifp->if_vnet) { 1029 CURVNET_RESTORE(); 1030 prison_free(pr); 1031 return (EEXIST); 1032 } 1033 1034 /* Get interface back from child jail/vnet. */ 1035 if_vmove(ifp, vnet_dst); 1036 CURVNET_RESTORE(); 1037 1038 /* Report the new if_xname back to the userland. */ 1039 sprintf(ifname, "%s", ifp->if_xname); 1040 1041 prison_free(pr); 1042 return (0); 1043 } 1044 #endif /* VIMAGE */ 1045 1046 /* 1047 * Add a group to an interface 1048 */ 1049 int 1050 if_addgroup(struct ifnet *ifp, const char *groupname) 1051 { 1052 struct ifg_list *ifgl; 1053 struct ifg_group *ifg = NULL; 1054 struct ifg_member *ifgm; 1055 1056 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 1057 groupname[strlen(groupname) - 1] <= '9') 1058 return (EINVAL); 1059 1060 IFNET_WLOCK(); 1061 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1062 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) { 1063 IFNET_WUNLOCK(); 1064 return (EEXIST); 1065 } 1066 1067 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP, 1068 M_NOWAIT)) == NULL) { 1069 IFNET_WUNLOCK(); 1070 return (ENOMEM); 1071 } 1072 1073 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member), 1074 M_TEMP, M_NOWAIT)) == NULL) { 1075 free(ifgl, M_TEMP); 1076 IFNET_WUNLOCK(); 1077 return (ENOMEM); 1078 } 1079 1080 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1081 if (!strcmp(ifg->ifg_group, groupname)) 1082 break; 1083 1084 if (ifg == NULL) { 1085 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group), 1086 M_TEMP, M_NOWAIT)) == NULL) { 1087 free(ifgl, M_TEMP); 1088 free(ifgm, M_TEMP); 1089 IFNET_WUNLOCK(); 1090 return (ENOMEM); 1091 } 1092 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 1093 ifg->ifg_refcnt = 0; 1094 TAILQ_INIT(&ifg->ifg_members); 1095 EVENTHANDLER_INVOKE(group_attach_event, ifg); 1096 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next); 1097 } 1098 1099 ifg->ifg_refcnt++; 1100 ifgl->ifgl_group = ifg; 1101 ifgm->ifgm_ifp = ifp; 1102 1103 IF_ADDR_LOCK(ifp); 1104 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 1105 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 1106 IF_ADDR_UNLOCK(ifp); 1107 1108 IFNET_WUNLOCK(); 1109 1110 EVENTHANDLER_INVOKE(group_change_event, groupname); 1111 1112 return (0); 1113 } 1114 1115 /* 1116 * Remove a group from an interface 1117 */ 1118 int 1119 if_delgroup(struct ifnet *ifp, const char *groupname) 1120 { 1121 struct ifg_list *ifgl; 1122 struct ifg_member *ifgm; 1123 1124 IFNET_WLOCK(); 1125 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1126 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1127 break; 1128 if (ifgl == NULL) { 1129 IFNET_WUNLOCK(); 1130 return (ENOENT); 1131 } 1132 1133 IF_ADDR_LOCK(ifp); 1134 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1135 IF_ADDR_UNLOCK(ifp); 1136 1137 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1138 if (ifgm->ifgm_ifp == ifp) 1139 break; 1140 1141 if (ifgm != NULL) { 1142 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 1143 free(ifgm, M_TEMP); 1144 } 1145 1146 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1147 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1148 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group); 1149 free(ifgl->ifgl_group, M_TEMP); 1150 } 1151 IFNET_WUNLOCK(); 1152 1153 free(ifgl, M_TEMP); 1154 1155 EVENTHANDLER_INVOKE(group_change_event, groupname); 1156 1157 return (0); 1158 } 1159 1160 /* 1161 * Remove an interface from all groups 1162 */ 1163 static void 1164 if_delgroups(struct ifnet *ifp) 1165 { 1166 struct ifg_list *ifgl; 1167 struct ifg_member *ifgm; 1168 char groupname[IFNAMSIZ]; 1169 1170 IFNET_WLOCK(); 1171 while (!TAILQ_EMPTY(&ifp->if_groups)) { 1172 ifgl = TAILQ_FIRST(&ifp->if_groups); 1173 1174 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ); 1175 1176 IF_ADDR_LOCK(ifp); 1177 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1178 IF_ADDR_UNLOCK(ifp); 1179 1180 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1181 if (ifgm->ifgm_ifp == ifp) 1182 break; 1183 1184 if (ifgm != NULL) { 1185 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, 1186 ifgm_next); 1187 free(ifgm, M_TEMP); 1188 } 1189 1190 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1191 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1192 EVENTHANDLER_INVOKE(group_detach_event, 1193 ifgl->ifgl_group); 1194 free(ifgl->ifgl_group, M_TEMP); 1195 } 1196 IFNET_WUNLOCK(); 1197 1198 free(ifgl, M_TEMP); 1199 1200 EVENTHANDLER_INVOKE(group_change_event, groupname); 1201 1202 IFNET_WLOCK(); 1203 } 1204 IFNET_WUNLOCK(); 1205 } 1206 1207 /* 1208 * Stores all groups from an interface in memory pointed 1209 * to by data 1210 */ 1211 static int 1212 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp) 1213 { 1214 int len, error; 1215 struct ifg_list *ifgl; 1216 struct ifg_req ifgrq, *ifgp; 1217 struct ifgroupreq *ifgr = data; 1218 1219 if (ifgr->ifgr_len == 0) { 1220 IF_ADDR_LOCK(ifp); 1221 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1222 ifgr->ifgr_len += sizeof(struct ifg_req); 1223 IF_ADDR_UNLOCK(ifp); 1224 return (0); 1225 } 1226 1227 len = ifgr->ifgr_len; 1228 ifgp = ifgr->ifgr_groups; 1229 /* XXX: wire */ 1230 IF_ADDR_LOCK(ifp); 1231 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 1232 if (len < sizeof(ifgrq)) { 1233 IF_ADDR_UNLOCK(ifp); 1234 return (EINVAL); 1235 } 1236 bzero(&ifgrq, sizeof ifgrq); 1237 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 1238 sizeof(ifgrq.ifgrq_group)); 1239 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1240 IF_ADDR_UNLOCK(ifp); 1241 return (error); 1242 } 1243 len -= sizeof(ifgrq); 1244 ifgp++; 1245 } 1246 IF_ADDR_UNLOCK(ifp); 1247 1248 return (0); 1249 } 1250 1251 /* 1252 * Stores all members of a group in memory pointed to by data 1253 */ 1254 static int 1255 if_getgroupmembers(struct ifgroupreq *data) 1256 { 1257 struct ifgroupreq *ifgr = data; 1258 struct ifg_group *ifg; 1259 struct ifg_member *ifgm; 1260 struct ifg_req ifgrq, *ifgp; 1261 int len, error; 1262 1263 IFNET_RLOCK(); 1264 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1265 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 1266 break; 1267 if (ifg == NULL) { 1268 IFNET_RUNLOCK(); 1269 return (ENOENT); 1270 } 1271 1272 if (ifgr->ifgr_len == 0) { 1273 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1274 ifgr->ifgr_len += sizeof(ifgrq); 1275 IFNET_RUNLOCK(); 1276 return (0); 1277 } 1278 1279 len = ifgr->ifgr_len; 1280 ifgp = ifgr->ifgr_groups; 1281 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1282 if (len < sizeof(ifgrq)) { 1283 IFNET_RUNLOCK(); 1284 return (EINVAL); 1285 } 1286 bzero(&ifgrq, sizeof ifgrq); 1287 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1288 sizeof(ifgrq.ifgrq_member)); 1289 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1290 IFNET_RUNLOCK(); 1291 return (error); 1292 } 1293 len -= sizeof(ifgrq); 1294 ifgp++; 1295 } 1296 IFNET_RUNLOCK(); 1297 1298 return (0); 1299 } 1300 1301 /* 1302 * Delete Routes for a Network Interface 1303 * 1304 * Called for each routing entry via the rnh->rnh_walktree() call above 1305 * to delete all route entries referencing a detaching network interface. 1306 * 1307 * Arguments: 1308 * rn pointer to node in the routing table 1309 * arg argument passed to rnh->rnh_walktree() - detaching interface 1310 * 1311 * Returns: 1312 * 0 successful 1313 * errno failed - reason indicated 1314 * 1315 */ 1316 static int 1317 if_rtdel(struct radix_node *rn, void *arg) 1318 { 1319 struct rtentry *rt = (struct rtentry *)rn; 1320 struct ifnet *ifp = arg; 1321 int err; 1322 1323 if (rt->rt_ifp == ifp) { 1324 1325 /* 1326 * Protect (sorta) against walktree recursion problems 1327 * with cloned routes 1328 */ 1329 if ((rt->rt_flags & RTF_UP) == 0) 1330 return (0); 1331 1332 err = rtrequest_fib(RTM_DELETE, rt_key(rt), rt->rt_gateway, 1333 rt_mask(rt), rt->rt_flags|RTF_RNH_LOCKED, 1334 (struct rtentry **) NULL, rt->rt_fibnum); 1335 if (err) { 1336 log(LOG_WARNING, "if_rtdel: error %d\n", err); 1337 } 1338 } 1339 1340 return (0); 1341 } 1342 1343 /* 1344 * Wrapper functions for struct ifnet address list locking macros. These are 1345 * used by kernel modules to avoid encoding programming interface or binary 1346 * interface assumptions that may be violated when kernel-internal locking 1347 * approaches change. 1348 */ 1349 void 1350 if_addr_rlock(struct ifnet *ifp) 1351 { 1352 1353 IF_ADDR_LOCK(ifp); 1354 } 1355 1356 void 1357 if_addr_runlock(struct ifnet *ifp) 1358 { 1359 1360 IF_ADDR_UNLOCK(ifp); 1361 } 1362 1363 void 1364 if_maddr_rlock(struct ifnet *ifp) 1365 { 1366 1367 IF_ADDR_LOCK(ifp); 1368 } 1369 1370 void 1371 if_maddr_runlock(struct ifnet *ifp) 1372 { 1373 1374 IF_ADDR_UNLOCK(ifp); 1375 } 1376 1377 /* 1378 * Reference count functions for ifaddrs. 1379 */ 1380 void 1381 ifa_init(struct ifaddr *ifa) 1382 { 1383 1384 mtx_init(&ifa->ifa_mtx, "ifaddr", NULL, MTX_DEF); 1385 refcount_init(&ifa->ifa_refcnt, 1); 1386 } 1387 1388 void 1389 ifa_ref(struct ifaddr *ifa) 1390 { 1391 1392 refcount_acquire(&ifa->ifa_refcnt); 1393 } 1394 1395 void 1396 ifa_free(struct ifaddr *ifa) 1397 { 1398 1399 if (refcount_release(&ifa->ifa_refcnt)) { 1400 mtx_destroy(&ifa->ifa_mtx); 1401 free(ifa, M_IFADDR); 1402 } 1403 } 1404 1405 int 1406 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1407 { 1408 int error = 0; 1409 struct rtentry *rt = NULL; 1410 struct rt_addrinfo info; 1411 static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK}; 1412 1413 bzero(&info, sizeof(info)); 1414 info.rti_ifp = V_loif; 1415 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; 1416 info.rti_info[RTAX_DST] = ia; 1417 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1418 error = rtrequest1_fib(RTM_ADD, &info, &rt, 0); 1419 1420 if (error == 0 && rt != NULL) { 1421 RT_LOCK(rt); 1422 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type = 1423 ifa->ifa_ifp->if_type; 1424 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index = 1425 ifa->ifa_ifp->if_index; 1426 RT_REMREF(rt); 1427 RT_UNLOCK(rt); 1428 } else if (error != 0) 1429 log(LOG_INFO, "ifa_add_loopback_route: insertion failed\n"); 1430 1431 return (error); 1432 } 1433 1434 int 1435 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1436 { 1437 int error = 0; 1438 struct rt_addrinfo info; 1439 struct sockaddr_dl null_sdl; 1440 1441 bzero(&null_sdl, sizeof(null_sdl)); 1442 null_sdl.sdl_len = sizeof(null_sdl); 1443 null_sdl.sdl_family = AF_LINK; 1444 null_sdl.sdl_type = ifa->ifa_ifp->if_type; 1445 null_sdl.sdl_index = ifa->ifa_ifp->if_index; 1446 bzero(&info, sizeof(info)); 1447 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; 1448 info.rti_info[RTAX_DST] = ia; 1449 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1450 error = rtrequest1_fib(RTM_DELETE, &info, NULL, 0); 1451 1452 if (error != 0) 1453 log(LOG_INFO, "ifa_del_loopback_route: deletion failed\n"); 1454 1455 return (error); 1456 } 1457 1458 /* 1459 * XXX: Because sockaddr_dl has deeper structure than the sockaddr 1460 * structs used to represent other address families, it is necessary 1461 * to perform a different comparison. 1462 */ 1463 1464 #define sa_equal(a1, a2) \ 1465 (bcmp((a1), (a2), ((a1))->sa_len) == 0) 1466 1467 #define sa_dl_equal(a1, a2) \ 1468 ((((struct sockaddr_dl *)(a1))->sdl_len == \ 1469 ((struct sockaddr_dl *)(a2))->sdl_len) && \ 1470 (bcmp(LLADDR((struct sockaddr_dl *)(a1)), \ 1471 LLADDR((struct sockaddr_dl *)(a2)), \ 1472 ((struct sockaddr_dl *)(a1))->sdl_alen) == 0)) 1473 1474 /* 1475 * Locate an interface based on a complete address. 1476 */ 1477 /*ARGSUSED*/ 1478 static struct ifaddr * 1479 ifa_ifwithaddr_internal(struct sockaddr *addr, int getref) 1480 { 1481 struct ifnet *ifp; 1482 struct ifaddr *ifa; 1483 1484 IFNET_RLOCK_NOSLEEP(); 1485 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1486 IF_ADDR_LOCK(ifp); 1487 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1488 if (ifa->ifa_addr->sa_family != addr->sa_family) 1489 continue; 1490 if (sa_equal(addr, ifa->ifa_addr)) { 1491 if (getref) 1492 ifa_ref(ifa); 1493 IF_ADDR_UNLOCK(ifp); 1494 goto done; 1495 } 1496 /* IP6 doesn't have broadcast */ 1497 if ((ifp->if_flags & IFF_BROADCAST) && 1498 ifa->ifa_broadaddr && 1499 ifa->ifa_broadaddr->sa_len != 0 && 1500 sa_equal(ifa->ifa_broadaddr, addr)) { 1501 if (getref) 1502 ifa_ref(ifa); 1503 IF_ADDR_UNLOCK(ifp); 1504 goto done; 1505 } 1506 } 1507 IF_ADDR_UNLOCK(ifp); 1508 } 1509 ifa = NULL; 1510 done: 1511 IFNET_RUNLOCK_NOSLEEP(); 1512 return (ifa); 1513 } 1514 1515 struct ifaddr * 1516 ifa_ifwithaddr(struct sockaddr *addr) 1517 { 1518 1519 return (ifa_ifwithaddr_internal(addr, 1)); 1520 } 1521 1522 int 1523 ifa_ifwithaddr_check(struct sockaddr *addr) 1524 { 1525 1526 return (ifa_ifwithaddr_internal(addr, 0) != NULL); 1527 } 1528 1529 /* 1530 * Locate an interface based on the broadcast address. 1531 */ 1532 /* ARGSUSED */ 1533 struct ifaddr * 1534 ifa_ifwithbroadaddr(struct sockaddr *addr) 1535 { 1536 struct ifnet *ifp; 1537 struct ifaddr *ifa; 1538 1539 IFNET_RLOCK_NOSLEEP(); 1540 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1541 IF_ADDR_LOCK(ifp); 1542 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1543 if (ifa->ifa_addr->sa_family != addr->sa_family) 1544 continue; 1545 if ((ifp->if_flags & IFF_BROADCAST) && 1546 ifa->ifa_broadaddr && 1547 ifa->ifa_broadaddr->sa_len != 0 && 1548 sa_equal(ifa->ifa_broadaddr, addr)) { 1549 ifa_ref(ifa); 1550 IF_ADDR_UNLOCK(ifp); 1551 goto done; 1552 } 1553 } 1554 IF_ADDR_UNLOCK(ifp); 1555 } 1556 ifa = NULL; 1557 done: 1558 IFNET_RUNLOCK_NOSLEEP(); 1559 return (ifa); 1560 } 1561 1562 /* 1563 * Locate the point to point interface with a given destination address. 1564 */ 1565 /*ARGSUSED*/ 1566 struct ifaddr * 1567 ifa_ifwithdstaddr(struct sockaddr *addr) 1568 { 1569 struct ifnet *ifp; 1570 struct ifaddr *ifa; 1571 1572 IFNET_RLOCK_NOSLEEP(); 1573 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1574 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1575 continue; 1576 IF_ADDR_LOCK(ifp); 1577 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1578 if (ifa->ifa_addr->sa_family != addr->sa_family) 1579 continue; 1580 if (ifa->ifa_dstaddr != NULL && 1581 sa_equal(addr, ifa->ifa_dstaddr)) { 1582 ifa_ref(ifa); 1583 IF_ADDR_UNLOCK(ifp); 1584 goto done; 1585 } 1586 } 1587 IF_ADDR_UNLOCK(ifp); 1588 } 1589 ifa = NULL; 1590 done: 1591 IFNET_RUNLOCK_NOSLEEP(); 1592 return (ifa); 1593 } 1594 1595 /* 1596 * Find an interface on a specific network. If many, choice 1597 * is most specific found. 1598 */ 1599 struct ifaddr * 1600 ifa_ifwithnet(struct sockaddr *addr) 1601 { 1602 struct ifnet *ifp; 1603 struct ifaddr *ifa; 1604 struct ifaddr *ifa_maybe = NULL; 1605 u_int af = addr->sa_family; 1606 char *addr_data = addr->sa_data, *cplim; 1607 1608 /* 1609 * AF_LINK addresses can be looked up directly by their index number, 1610 * so do that if we can. 1611 */ 1612 if (af == AF_LINK) { 1613 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; 1614 if (sdl->sdl_index && sdl->sdl_index <= V_if_index) 1615 return (ifaddr_byindex(sdl->sdl_index)); 1616 } 1617 1618 /* 1619 * Scan though each interface, looking for ones that have addresses 1620 * in this address family. Maintain a reference on ifa_maybe once 1621 * we find one, as we release the IF_ADDR_LOCK() that kept it stable 1622 * when we move onto the next interface. 1623 */ 1624 IFNET_RLOCK_NOSLEEP(); 1625 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1626 IF_ADDR_LOCK(ifp); 1627 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1628 char *cp, *cp2, *cp3; 1629 1630 if (ifa->ifa_addr->sa_family != af) 1631 next: continue; 1632 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) { 1633 /* 1634 * This is a bit broken as it doesn't 1635 * take into account that the remote end may 1636 * be a single node in the network we are 1637 * looking for. 1638 * The trouble is that we don't know the 1639 * netmask for the remote end. 1640 */ 1641 if (ifa->ifa_dstaddr != NULL && 1642 sa_equal(addr, ifa->ifa_dstaddr)) { 1643 ifa_ref(ifa); 1644 IF_ADDR_UNLOCK(ifp); 1645 goto done; 1646 } 1647 } else { 1648 /* 1649 * if we have a special address handler, 1650 * then use it instead of the generic one. 1651 */ 1652 if (ifa->ifa_claim_addr) { 1653 if ((*ifa->ifa_claim_addr)(ifa, addr)) { 1654 ifa_ref(ifa); 1655 IF_ADDR_UNLOCK(ifp); 1656 goto done; 1657 } 1658 continue; 1659 } 1660 1661 /* 1662 * Scan all the bits in the ifa's address. 1663 * If a bit dissagrees with what we are 1664 * looking for, mask it with the netmask 1665 * to see if it really matters. 1666 * (A byte at a time) 1667 */ 1668 if (ifa->ifa_netmask == 0) 1669 continue; 1670 cp = addr_data; 1671 cp2 = ifa->ifa_addr->sa_data; 1672 cp3 = ifa->ifa_netmask->sa_data; 1673 cplim = ifa->ifa_netmask->sa_len 1674 + (char *)ifa->ifa_netmask; 1675 while (cp3 < cplim) 1676 if ((*cp++ ^ *cp2++) & *cp3++) 1677 goto next; /* next address! */ 1678 /* 1679 * If the netmask of what we just found 1680 * is more specific than what we had before 1681 * (if we had one) then remember the new one 1682 * before continuing to search 1683 * for an even better one. 1684 */ 1685 if (ifa_maybe == NULL || 1686 rn_refines((caddr_t)ifa->ifa_netmask, 1687 (caddr_t)ifa_maybe->ifa_netmask)) { 1688 if (ifa_maybe != NULL) 1689 ifa_free(ifa_maybe); 1690 ifa_maybe = ifa; 1691 ifa_ref(ifa_maybe); 1692 } 1693 } 1694 } 1695 IF_ADDR_UNLOCK(ifp); 1696 } 1697 ifa = ifa_maybe; 1698 ifa_maybe = NULL; 1699 done: 1700 IFNET_RUNLOCK_NOSLEEP(); 1701 if (ifa_maybe != NULL) 1702 ifa_free(ifa_maybe); 1703 return (ifa); 1704 } 1705 1706 /* 1707 * Find an interface address specific to an interface best matching 1708 * a given address. 1709 */ 1710 struct ifaddr * 1711 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp) 1712 { 1713 struct ifaddr *ifa; 1714 char *cp, *cp2, *cp3; 1715 char *cplim; 1716 struct ifaddr *ifa_maybe = NULL; 1717 u_int af = addr->sa_family; 1718 1719 if (af >= AF_MAX) 1720 return (0); 1721 IF_ADDR_LOCK(ifp); 1722 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1723 if (ifa->ifa_addr->sa_family != af) 1724 continue; 1725 if (ifa_maybe == NULL) 1726 ifa_maybe = ifa; 1727 if (ifa->ifa_netmask == 0) { 1728 if (sa_equal(addr, ifa->ifa_addr) || 1729 (ifa->ifa_dstaddr && 1730 sa_equal(addr, ifa->ifa_dstaddr))) 1731 goto done; 1732 continue; 1733 } 1734 if (ifp->if_flags & IFF_POINTOPOINT) { 1735 if (sa_equal(addr, ifa->ifa_dstaddr)) 1736 goto done; 1737 } else { 1738 cp = addr->sa_data; 1739 cp2 = ifa->ifa_addr->sa_data; 1740 cp3 = ifa->ifa_netmask->sa_data; 1741 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1742 for (; cp3 < cplim; cp3++) 1743 if ((*cp++ ^ *cp2++) & *cp3) 1744 break; 1745 if (cp3 == cplim) 1746 goto done; 1747 } 1748 } 1749 ifa = ifa_maybe; 1750 done: 1751 if (ifa != NULL) 1752 ifa_ref(ifa); 1753 IF_ADDR_UNLOCK(ifp); 1754 return (ifa); 1755 } 1756 1757 #include <net/if_llatbl.h> 1758 1759 /* 1760 * Default action when installing a route with a Link Level gateway. 1761 * Lookup an appropriate real ifa to point to. 1762 * This should be moved to /sys/net/link.c eventually. 1763 */ 1764 static void 1765 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 1766 { 1767 struct ifaddr *ifa, *oifa; 1768 struct sockaddr *dst; 1769 struct ifnet *ifp; 1770 1771 RT_LOCK_ASSERT(rt); 1772 1773 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) || 1774 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0)) 1775 return; 1776 ifa = ifaof_ifpforaddr(dst, ifp); 1777 if (ifa) { 1778 oifa = rt->rt_ifa; 1779 rt->rt_ifa = ifa; 1780 ifa_free(oifa); 1781 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1782 ifa->ifa_rtrequest(cmd, rt, info); 1783 } 1784 } 1785 1786 /* 1787 * Mark an interface down and notify protocols of 1788 * the transition. 1789 * NOTE: must be called at splnet or eqivalent. 1790 */ 1791 static void 1792 if_unroute(struct ifnet *ifp, int flag, int fam) 1793 { 1794 struct ifaddr *ifa; 1795 1796 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP")); 1797 1798 ifp->if_flags &= ~flag; 1799 getmicrotime(&ifp->if_lastchange); 1800 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 1801 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1802 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1803 ifp->if_qflush(ifp); 1804 1805 #if defined(INET) || defined(INET6) 1806 #ifdef DEV_CARP 1807 if (ifp->if_carp) 1808 carp_carpdev_state(ifp->if_carp); 1809 #endif 1810 #endif 1811 rt_ifmsg(ifp); 1812 } 1813 1814 /* 1815 * Mark an interface up and notify protocols of 1816 * the transition. 1817 * NOTE: must be called at splnet or eqivalent. 1818 */ 1819 static void 1820 if_route(struct ifnet *ifp, int flag, int fam) 1821 { 1822 struct ifaddr *ifa; 1823 1824 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP")); 1825 1826 ifp->if_flags |= flag; 1827 getmicrotime(&ifp->if_lastchange); 1828 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 1829 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1830 pfctlinput(PRC_IFUP, ifa->ifa_addr); 1831 #if defined(INET) || defined(INET6) 1832 #ifdef DEV_CARP 1833 if (ifp->if_carp) 1834 carp_carpdev_state(ifp->if_carp); 1835 #endif 1836 #endif 1837 rt_ifmsg(ifp); 1838 #ifdef INET6 1839 in6_if_up(ifp); 1840 #endif 1841 } 1842 1843 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */ 1844 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */ 1845 1846 /* 1847 * Handle a change in the interface link state. To avoid LORs 1848 * between driver lock and upper layer locks, as well as possible 1849 * recursions, we post event to taskqueue, and all job 1850 * is done in static do_link_state_change(). 1851 */ 1852 void 1853 if_link_state_change(struct ifnet *ifp, int link_state) 1854 { 1855 /* Return if state hasn't changed. */ 1856 if (ifp->if_link_state == link_state) 1857 return; 1858 1859 ifp->if_link_state = link_state; 1860 1861 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask); 1862 } 1863 1864 static void 1865 do_link_state_change(void *arg, int pending) 1866 { 1867 struct ifnet *ifp = (struct ifnet *)arg; 1868 int link_state = ifp->if_link_state; 1869 CURVNET_SET(ifp->if_vnet); 1870 1871 /* Notify that the link state has changed. */ 1872 rt_ifmsg(ifp); 1873 if (ifp->if_vlantrunk != NULL) 1874 (*vlan_link_state_p)(ifp); 1875 1876 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) && 1877 IFP2AC(ifp)->ac_netgraph != NULL) 1878 (*ng_ether_link_state_p)(ifp, link_state); 1879 #if defined(INET) || defined(INET6) 1880 #ifdef DEV_CARP 1881 if (ifp->if_carp) 1882 carp_carpdev_state(ifp->if_carp); 1883 #endif 1884 #endif 1885 if (ifp->if_bridge) { 1886 KASSERT(bstp_linkstate_p != NULL,("if_bridge bstp not loaded!")); 1887 (*bstp_linkstate_p)(ifp, link_state); 1888 } 1889 if (ifp->if_lagg) { 1890 KASSERT(lagg_linkstate_p != NULL,("if_lagg not loaded!")); 1891 (*lagg_linkstate_p)(ifp, link_state); 1892 } 1893 1894 if (IS_DEFAULT_VNET(curvnet)) 1895 devctl_notify("IFNET", ifp->if_xname, 1896 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", 1897 NULL); 1898 if (pending > 1) 1899 if_printf(ifp, "%d link states coalesced\n", pending); 1900 if (log_link_state_change) 1901 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname, 1902 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" ); 1903 CURVNET_RESTORE(); 1904 } 1905 1906 /* 1907 * Mark an interface down and notify protocols of 1908 * the transition. 1909 * NOTE: must be called at splnet or eqivalent. 1910 */ 1911 void 1912 if_down(struct ifnet *ifp) 1913 { 1914 1915 if_unroute(ifp, IFF_UP, AF_UNSPEC); 1916 } 1917 1918 /* 1919 * Mark an interface up and notify protocols of 1920 * the transition. 1921 * NOTE: must be called at splnet or eqivalent. 1922 */ 1923 void 1924 if_up(struct ifnet *ifp) 1925 { 1926 1927 if_route(ifp, IFF_UP, AF_UNSPEC); 1928 } 1929 1930 /* 1931 * Flush an interface queue. 1932 */ 1933 void 1934 if_qflush(struct ifnet *ifp) 1935 { 1936 struct mbuf *m, *n; 1937 struct ifaltq *ifq; 1938 1939 ifq = &ifp->if_snd; 1940 IFQ_LOCK(ifq); 1941 #ifdef ALTQ 1942 if (ALTQ_IS_ENABLED(ifq)) 1943 ALTQ_PURGE(ifq); 1944 #endif 1945 n = ifq->ifq_head; 1946 while ((m = n) != 0) { 1947 n = m->m_act; 1948 m_freem(m); 1949 } 1950 ifq->ifq_head = 0; 1951 ifq->ifq_tail = 0; 1952 ifq->ifq_len = 0; 1953 IFQ_UNLOCK(ifq); 1954 } 1955 1956 /* 1957 * Map interface name to interface structure pointer, with or without 1958 * returning a reference. 1959 */ 1960 struct ifnet * 1961 ifunit_ref(const char *name) 1962 { 1963 struct ifnet *ifp; 1964 1965 IFNET_RLOCK_NOSLEEP(); 1966 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1967 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 && 1968 !(ifp->if_flags & IFF_DYING)) 1969 break; 1970 } 1971 if (ifp != NULL) 1972 if_ref(ifp); 1973 IFNET_RUNLOCK_NOSLEEP(); 1974 return (ifp); 1975 } 1976 1977 struct ifnet * 1978 ifunit(const char *name) 1979 { 1980 struct ifnet *ifp; 1981 1982 IFNET_RLOCK_NOSLEEP(); 1983 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1984 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0) 1985 break; 1986 } 1987 IFNET_RUNLOCK_NOSLEEP(); 1988 return (ifp); 1989 } 1990 1991 /* 1992 * Hardware specific interface ioctls. 1993 */ 1994 static int 1995 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td) 1996 { 1997 struct ifreq *ifr; 1998 struct ifstat *ifs; 1999 int error = 0; 2000 int new_flags, temp_flags; 2001 size_t namelen, onamelen; 2002 size_t descrlen; 2003 char *descrbuf, *odescrbuf; 2004 char new_name[IFNAMSIZ]; 2005 struct ifaddr *ifa; 2006 struct sockaddr_dl *sdl; 2007 2008 ifr = (struct ifreq *)data; 2009 switch (cmd) { 2010 case SIOCGIFINDEX: 2011 ifr->ifr_index = ifp->if_index; 2012 break; 2013 2014 case SIOCGIFFLAGS: 2015 temp_flags = ifp->if_flags | ifp->if_drv_flags; 2016 ifr->ifr_flags = temp_flags & 0xffff; 2017 ifr->ifr_flagshigh = temp_flags >> 16; 2018 break; 2019 2020 case SIOCGIFCAP: 2021 ifr->ifr_reqcap = ifp->if_capabilities; 2022 ifr->ifr_curcap = ifp->if_capenable; 2023 break; 2024 2025 #ifdef MAC 2026 case SIOCGIFMAC: 2027 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp); 2028 break; 2029 #endif 2030 2031 case SIOCGIFMETRIC: 2032 ifr->ifr_metric = ifp->if_metric; 2033 break; 2034 2035 case SIOCGIFMTU: 2036 ifr->ifr_mtu = ifp->if_mtu; 2037 break; 2038 2039 case SIOCGIFPHYS: 2040 ifr->ifr_phys = ifp->if_physical; 2041 break; 2042 2043 case SIOCGIFDESCR: 2044 error = 0; 2045 sx_slock(&ifdescr_sx); 2046 if (ifp->if_description == NULL) { 2047 ifr->ifr_buffer.length = 0; 2048 error = ENOMSG; 2049 } else { 2050 /* space for terminating nul */ 2051 descrlen = strlen(ifp->if_description) + 1; 2052 if (ifr->ifr_buffer.length < descrlen) 2053 error = ENAMETOOLONG; 2054 else 2055 error = copyout(ifp->if_description, 2056 ifr->ifr_buffer.buffer, descrlen); 2057 ifr->ifr_buffer.length = descrlen; 2058 } 2059 sx_sunlock(&ifdescr_sx); 2060 break; 2061 2062 case SIOCSIFDESCR: 2063 error = priv_check(td, PRIV_NET_SETIFDESCR); 2064 if (error) 2065 return (error); 2066 2067 /* 2068 * Copy only (length-1) bytes to make sure that 2069 * if_description is always nul terminated. The 2070 * length parameter is supposed to count the 2071 * terminating nul in. 2072 */ 2073 if (ifr->ifr_buffer.length > ifdescr_maxlen) 2074 return (ENAMETOOLONG); 2075 else if (ifr->ifr_buffer.length == 0) 2076 descrbuf = NULL; 2077 else { 2078 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR, 2079 M_WAITOK | M_ZERO); 2080 error = copyin(ifr->ifr_buffer.buffer, descrbuf, 2081 ifr->ifr_buffer.length - 1); 2082 if (error) { 2083 free(descrbuf, M_IFDESCR); 2084 break; 2085 } 2086 } 2087 2088 sx_xlock(&ifdescr_sx); 2089 odescrbuf = ifp->if_description; 2090 ifp->if_description = descrbuf; 2091 sx_xunlock(&ifdescr_sx); 2092 2093 getmicrotime(&ifp->if_lastchange); 2094 free(odescrbuf, M_IFDESCR); 2095 break; 2096 2097 case SIOCSIFFLAGS: 2098 error = priv_check(td, PRIV_NET_SETIFFLAGS); 2099 if (error) 2100 return (error); 2101 /* 2102 * Currently, no driver owned flags pass the IFF_CANTCHANGE 2103 * check, so we don't need special handling here yet. 2104 */ 2105 new_flags = (ifr->ifr_flags & 0xffff) | 2106 (ifr->ifr_flagshigh << 16); 2107 if (ifp->if_flags & IFF_SMART) { 2108 /* Smart drivers twiddle their own routes */ 2109 } else if (ifp->if_flags & IFF_UP && 2110 (new_flags & IFF_UP) == 0) { 2111 int s = splimp(); 2112 if_down(ifp); 2113 splx(s); 2114 } else if (new_flags & IFF_UP && 2115 (ifp->if_flags & IFF_UP) == 0) { 2116 int s = splimp(); 2117 if_up(ifp); 2118 splx(s); 2119 } 2120 /* See if permanently promiscuous mode bit is about to flip */ 2121 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) { 2122 if (new_flags & IFF_PPROMISC) 2123 ifp->if_flags |= IFF_PROMISC; 2124 else if (ifp->if_pcount == 0) 2125 ifp->if_flags &= ~IFF_PROMISC; 2126 log(LOG_INFO, "%s: permanently promiscuous mode %s\n", 2127 ifp->if_xname, 2128 (new_flags & IFF_PPROMISC) ? "enabled" : "disabled"); 2129 } 2130 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 2131 (new_flags &~ IFF_CANTCHANGE); 2132 if (ifp->if_ioctl) { 2133 (void) (*ifp->if_ioctl)(ifp, cmd, data); 2134 } 2135 getmicrotime(&ifp->if_lastchange); 2136 break; 2137 2138 case SIOCSIFCAP: 2139 error = priv_check(td, PRIV_NET_SETIFCAP); 2140 if (error) 2141 return (error); 2142 if (ifp->if_ioctl == NULL) 2143 return (EOPNOTSUPP); 2144 if (ifr->ifr_reqcap & ~ifp->if_capabilities) 2145 return (EINVAL); 2146 error = (*ifp->if_ioctl)(ifp, cmd, data); 2147 if (error == 0) 2148 getmicrotime(&ifp->if_lastchange); 2149 break; 2150 2151 #ifdef MAC 2152 case SIOCSIFMAC: 2153 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp); 2154 break; 2155 #endif 2156 2157 case SIOCSIFNAME: 2158 error = priv_check(td, PRIV_NET_SETIFNAME); 2159 if (error) 2160 return (error); 2161 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 2162 if (error != 0) 2163 return (error); 2164 if (new_name[0] == '\0') 2165 return (EINVAL); 2166 if (ifunit(new_name) != NULL) 2167 return (EEXIST); 2168 2169 /* 2170 * XXX: Locking. Nothing else seems to lock if_flags, 2171 * and there are numerous other races with the 2172 * ifunit() checks not being atomic with namespace 2173 * changes (renames, vmoves, if_attach, etc). 2174 */ 2175 ifp->if_flags |= IFF_RENAMING; 2176 2177 /* Announce the departure of the interface. */ 2178 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 2179 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 2180 2181 log(LOG_INFO, "%s: changing name to '%s'\n", 2182 ifp->if_xname, new_name); 2183 2184 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 2185 ifa = ifp->if_addr; 2186 IFA_LOCK(ifa); 2187 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 2188 namelen = strlen(new_name); 2189 onamelen = sdl->sdl_nlen; 2190 /* 2191 * Move the address if needed. This is safe because we 2192 * allocate space for a name of length IFNAMSIZ when we 2193 * create this in if_attach(). 2194 */ 2195 if (namelen != onamelen) { 2196 bcopy(sdl->sdl_data + onamelen, 2197 sdl->sdl_data + namelen, sdl->sdl_alen); 2198 } 2199 bcopy(new_name, sdl->sdl_data, namelen); 2200 sdl->sdl_nlen = namelen; 2201 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 2202 bzero(sdl->sdl_data, onamelen); 2203 while (namelen != 0) 2204 sdl->sdl_data[--namelen] = 0xff; 2205 IFA_UNLOCK(ifa); 2206 2207 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 2208 /* Announce the return of the interface. */ 2209 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 2210 2211 ifp->if_flags &= ~IFF_RENAMING; 2212 break; 2213 2214 #ifdef VIMAGE 2215 case SIOCSIFVNET: 2216 error = priv_check(td, PRIV_NET_SETIFVNET); 2217 if (error) 2218 return (error); 2219 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid); 2220 break; 2221 #endif 2222 2223 case SIOCSIFMETRIC: 2224 error = priv_check(td, PRIV_NET_SETIFMETRIC); 2225 if (error) 2226 return (error); 2227 ifp->if_metric = ifr->ifr_metric; 2228 getmicrotime(&ifp->if_lastchange); 2229 break; 2230 2231 case SIOCSIFPHYS: 2232 error = priv_check(td, PRIV_NET_SETIFPHYS); 2233 if (error) 2234 return (error); 2235 if (ifp->if_ioctl == NULL) 2236 return (EOPNOTSUPP); 2237 error = (*ifp->if_ioctl)(ifp, cmd, data); 2238 if (error == 0) 2239 getmicrotime(&ifp->if_lastchange); 2240 break; 2241 2242 case SIOCSIFMTU: 2243 { 2244 u_long oldmtu = ifp->if_mtu; 2245 2246 error = priv_check(td, PRIV_NET_SETIFMTU); 2247 if (error) 2248 return (error); 2249 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) 2250 return (EINVAL); 2251 if (ifp->if_ioctl == NULL) 2252 return (EOPNOTSUPP); 2253 error = (*ifp->if_ioctl)(ifp, cmd, data); 2254 if (error == 0) { 2255 getmicrotime(&ifp->if_lastchange); 2256 rt_ifmsg(ifp); 2257 } 2258 /* 2259 * If the link MTU changed, do network layer specific procedure. 2260 */ 2261 if (ifp->if_mtu != oldmtu) { 2262 #ifdef INET6 2263 nd6_setmtu(ifp); 2264 #endif 2265 } 2266 break; 2267 } 2268 2269 case SIOCADDMULTI: 2270 case SIOCDELMULTI: 2271 if (cmd == SIOCADDMULTI) 2272 error = priv_check(td, PRIV_NET_ADDMULTI); 2273 else 2274 error = priv_check(td, PRIV_NET_DELMULTI); 2275 if (error) 2276 return (error); 2277 2278 /* Don't allow group membership on non-multicast interfaces. */ 2279 if ((ifp->if_flags & IFF_MULTICAST) == 0) 2280 return (EOPNOTSUPP); 2281 2282 /* Don't let users screw up protocols' entries. */ 2283 if (ifr->ifr_addr.sa_family != AF_LINK) 2284 return (EINVAL); 2285 2286 if (cmd == SIOCADDMULTI) { 2287 struct ifmultiaddr *ifma; 2288 2289 /* 2290 * Userland is only permitted to join groups once 2291 * via the if_addmulti() KPI, because it cannot hold 2292 * struct ifmultiaddr * between calls. It may also 2293 * lose a race while we check if the membership 2294 * already exists. 2295 */ 2296 IF_ADDR_LOCK(ifp); 2297 ifma = if_findmulti(ifp, &ifr->ifr_addr); 2298 IF_ADDR_UNLOCK(ifp); 2299 if (ifma != NULL) 2300 error = EADDRINUSE; 2301 else 2302 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 2303 } else { 2304 error = if_delmulti(ifp, &ifr->ifr_addr); 2305 } 2306 if (error == 0) 2307 getmicrotime(&ifp->if_lastchange); 2308 break; 2309 2310 case SIOCSIFPHYADDR: 2311 case SIOCDIFPHYADDR: 2312 #ifdef INET6 2313 case SIOCSIFPHYADDR_IN6: 2314 #endif 2315 case SIOCSLIFPHYADDR: 2316 case SIOCSIFMEDIA: 2317 case SIOCSIFGENERIC: 2318 error = priv_check(td, PRIV_NET_HWIOCTL); 2319 if (error) 2320 return (error); 2321 if (ifp->if_ioctl == NULL) 2322 return (EOPNOTSUPP); 2323 error = (*ifp->if_ioctl)(ifp, cmd, data); 2324 if (error == 0) 2325 getmicrotime(&ifp->if_lastchange); 2326 break; 2327 2328 case SIOCGIFSTATUS: 2329 ifs = (struct ifstat *)data; 2330 ifs->ascii[0] = '\0'; 2331 2332 case SIOCGIFPSRCADDR: 2333 case SIOCGIFPDSTADDR: 2334 case SIOCGLIFPHYADDR: 2335 case SIOCGIFMEDIA: 2336 case SIOCGIFGENERIC: 2337 if (ifp->if_ioctl == NULL) 2338 return (EOPNOTSUPP); 2339 error = (*ifp->if_ioctl)(ifp, cmd, data); 2340 break; 2341 2342 case SIOCSIFLLADDR: 2343 error = priv_check(td, PRIV_NET_SETLLADDR); 2344 if (error) 2345 return (error); 2346 error = if_setlladdr(ifp, 2347 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); 2348 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 2349 break; 2350 2351 case SIOCAIFGROUP: 2352 { 2353 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2354 2355 error = priv_check(td, PRIV_NET_ADDIFGROUP); 2356 if (error) 2357 return (error); 2358 if ((error = if_addgroup(ifp, ifgr->ifgr_group))) 2359 return (error); 2360 break; 2361 } 2362 2363 case SIOCGIFGROUP: 2364 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp))) 2365 return (error); 2366 break; 2367 2368 case SIOCDIFGROUP: 2369 { 2370 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2371 2372 error = priv_check(td, PRIV_NET_DELIFGROUP); 2373 if (error) 2374 return (error); 2375 if ((error = if_delgroup(ifp, ifgr->ifgr_group))) 2376 return (error); 2377 break; 2378 } 2379 2380 default: 2381 error = ENOIOCTL; 2382 break; 2383 } 2384 return (error); 2385 } 2386 2387 /* 2388 * Interface ioctls. 2389 */ 2390 int 2391 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td) 2392 { 2393 struct ifnet *ifp; 2394 struct ifreq *ifr; 2395 int error; 2396 int oif_flags; 2397 2398 switch (cmd) { 2399 case SIOCGIFCONF: 2400 case OSIOCGIFCONF: 2401 #ifdef __amd64__ 2402 case SIOCGIFCONF32: 2403 #endif 2404 return (ifconf(cmd, data)); 2405 } 2406 ifr = (struct ifreq *)data; 2407 2408 switch (cmd) { 2409 #ifdef VIMAGE 2410 case SIOCSIFRVNET: 2411 error = priv_check(td, PRIV_NET_SETIFVNET); 2412 if (error) 2413 return (error); 2414 return (if_vmove_reclaim(td, ifr->ifr_name, ifr->ifr_jid)); 2415 #endif 2416 case SIOCIFCREATE: 2417 case SIOCIFCREATE2: 2418 error = priv_check(td, PRIV_NET_IFCREATE); 2419 if (error) 2420 return (error); 2421 return (if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name), 2422 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL)); 2423 case SIOCIFDESTROY: 2424 error = priv_check(td, PRIV_NET_IFDESTROY); 2425 if (error) 2426 return (error); 2427 return if_clone_destroy(ifr->ifr_name); 2428 2429 case SIOCIFGCLONERS: 2430 return (if_clone_list((struct if_clonereq *)data)); 2431 case SIOCGIFGMEMB: 2432 return (if_getgroupmembers((struct ifgroupreq *)data)); 2433 } 2434 2435 ifp = ifunit_ref(ifr->ifr_name); 2436 if (ifp == NULL) 2437 return (ENXIO); 2438 2439 error = ifhwioctl(cmd, ifp, data, td); 2440 if (error != ENOIOCTL) { 2441 if_rele(ifp); 2442 return (error); 2443 } 2444 2445 oif_flags = ifp->if_flags; 2446 if (so->so_proto == NULL) { 2447 if_rele(ifp); 2448 return (EOPNOTSUPP); 2449 } 2450 #ifndef COMPAT_43 2451 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, 2452 data, 2453 ifp, td)); 2454 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL) 2455 error = (*ifp->if_ioctl)(ifp, cmd, data); 2456 #else 2457 { 2458 u_long ocmd = cmd; 2459 2460 switch (cmd) { 2461 2462 case SIOCSIFDSTADDR: 2463 case SIOCSIFADDR: 2464 case SIOCSIFBRDADDR: 2465 case SIOCSIFNETMASK: 2466 #if BYTE_ORDER != BIG_ENDIAN 2467 if (ifr->ifr_addr.sa_family == 0 && 2468 ifr->ifr_addr.sa_len < 16) { 2469 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len; 2470 ifr->ifr_addr.sa_len = 16; 2471 } 2472 #else 2473 if (ifr->ifr_addr.sa_len == 0) 2474 ifr->ifr_addr.sa_len = 16; 2475 #endif 2476 break; 2477 2478 case OSIOCGIFADDR: 2479 cmd = SIOCGIFADDR; 2480 break; 2481 2482 case OSIOCGIFDSTADDR: 2483 cmd = SIOCGIFDSTADDR; 2484 break; 2485 2486 case OSIOCGIFBRDADDR: 2487 cmd = SIOCGIFBRDADDR; 2488 break; 2489 2490 case OSIOCGIFNETMASK: 2491 cmd = SIOCGIFNETMASK; 2492 } 2493 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, 2494 cmd, 2495 data, 2496 ifp, td)); 2497 if (error == EOPNOTSUPP && ifp != NULL && 2498 ifp->if_ioctl != NULL) 2499 error = (*ifp->if_ioctl)(ifp, cmd, data); 2500 switch (ocmd) { 2501 2502 case OSIOCGIFADDR: 2503 case OSIOCGIFDSTADDR: 2504 case OSIOCGIFBRDADDR: 2505 case OSIOCGIFNETMASK: 2506 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family; 2507 2508 } 2509 } 2510 #endif /* COMPAT_43 */ 2511 2512 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 2513 #ifdef INET6 2514 if (ifp->if_flags & IFF_UP) { 2515 int s = splimp(); 2516 in6_if_up(ifp); 2517 splx(s); 2518 } 2519 #endif 2520 } 2521 if_rele(ifp); 2522 return (error); 2523 } 2524 2525 /* 2526 * The code common to handling reference counted flags, 2527 * e.g., in ifpromisc() and if_allmulti(). 2528 * The "pflag" argument can specify a permanent mode flag to check, 2529 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none. 2530 * 2531 * Only to be used on stack-owned flags, not driver-owned flags. 2532 */ 2533 static int 2534 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch) 2535 { 2536 struct ifreq ifr; 2537 int error; 2538 int oldflags, oldcount; 2539 2540 /* Sanity checks to catch programming errors */ 2541 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0, 2542 ("%s: setting driver-owned flag %d", __func__, flag)); 2543 2544 if (onswitch) 2545 KASSERT(*refcount >= 0, 2546 ("%s: increment negative refcount %d for flag %d", 2547 __func__, *refcount, flag)); 2548 else 2549 KASSERT(*refcount > 0, 2550 ("%s: decrement non-positive refcount %d for flag %d", 2551 __func__, *refcount, flag)); 2552 2553 /* In case this mode is permanent, just touch refcount */ 2554 if (ifp->if_flags & pflag) { 2555 *refcount += onswitch ? 1 : -1; 2556 return (0); 2557 } 2558 2559 /* Save ifnet parameters for if_ioctl() may fail */ 2560 oldcount = *refcount; 2561 oldflags = ifp->if_flags; 2562 2563 /* 2564 * See if we aren't the only and touching refcount is enough. 2565 * Actually toggle interface flag if we are the first or last. 2566 */ 2567 if (onswitch) { 2568 if ((*refcount)++) 2569 return (0); 2570 ifp->if_flags |= flag; 2571 } else { 2572 if (--(*refcount)) 2573 return (0); 2574 ifp->if_flags &= ~flag; 2575 } 2576 2577 /* Call down the driver since we've changed interface flags */ 2578 if (ifp->if_ioctl == NULL) { 2579 error = EOPNOTSUPP; 2580 goto recover; 2581 } 2582 ifr.ifr_flags = ifp->if_flags & 0xffff; 2583 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2584 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 2585 if (error) 2586 goto recover; 2587 /* Notify userland that interface flags have changed */ 2588 rt_ifmsg(ifp); 2589 return (0); 2590 2591 recover: 2592 /* Recover after driver error */ 2593 *refcount = oldcount; 2594 ifp->if_flags = oldflags; 2595 return (error); 2596 } 2597 2598 /* 2599 * Set/clear promiscuous mode on interface ifp based on the truth value 2600 * of pswitch. The calls are reference counted so that only the first 2601 * "on" request actually has an effect, as does the final "off" request. 2602 * Results are undefined if the "off" and "on" requests are not matched. 2603 */ 2604 int 2605 ifpromisc(struct ifnet *ifp, int pswitch) 2606 { 2607 int error; 2608 int oldflags = ifp->if_flags; 2609 2610 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC, 2611 &ifp->if_pcount, pswitch); 2612 /* If promiscuous mode status has changed, log a message */ 2613 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC)) 2614 log(LOG_INFO, "%s: promiscuous mode %s\n", 2615 ifp->if_xname, 2616 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled"); 2617 return (error); 2618 } 2619 2620 /* 2621 * Return interface configuration 2622 * of system. List may be used 2623 * in later ioctl's (above) to get 2624 * other information. 2625 */ 2626 /*ARGSUSED*/ 2627 static int 2628 ifconf(u_long cmd, caddr_t data) 2629 { 2630 struct ifconf *ifc = (struct ifconf *)data; 2631 #ifdef __amd64__ 2632 struct ifconf32 *ifc32 = (struct ifconf32 *)data; 2633 struct ifconf ifc_swab; 2634 #endif 2635 struct ifnet *ifp; 2636 struct ifaddr *ifa; 2637 struct ifreq ifr; 2638 struct sbuf *sb; 2639 int error, full = 0, valid_len, max_len; 2640 2641 #ifdef __amd64__ 2642 if (cmd == SIOCGIFCONF32) { 2643 ifc_swab.ifc_len = ifc32->ifc_len; 2644 ifc_swab.ifc_buf = (caddr_t)(uintptr_t)ifc32->ifc_buf; 2645 ifc = &ifc_swab; 2646 } 2647 #endif 2648 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */ 2649 max_len = MAXPHYS - 1; 2650 2651 /* Prevent hostile input from being able to crash the system */ 2652 if (ifc->ifc_len <= 0) 2653 return (EINVAL); 2654 2655 again: 2656 if (ifc->ifc_len <= max_len) { 2657 max_len = ifc->ifc_len; 2658 full = 1; 2659 } 2660 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN); 2661 max_len = 0; 2662 valid_len = 0; 2663 2664 IFNET_RLOCK(); 2665 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2666 int addrs; 2667 2668 /* 2669 * Zero the ifr_name buffer to make sure we don't 2670 * disclose the contents of the stack. 2671 */ 2672 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name)); 2673 2674 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 2675 >= sizeof(ifr.ifr_name)) { 2676 sbuf_delete(sb); 2677 IFNET_RUNLOCK(); 2678 return (ENAMETOOLONG); 2679 } 2680 2681 addrs = 0; 2682 IF_ADDR_LOCK(ifp); 2683 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2684 struct sockaddr *sa = ifa->ifa_addr; 2685 2686 if (prison_if(curthread->td_ucred, sa) != 0) 2687 continue; 2688 addrs++; 2689 #ifdef COMPAT_43 2690 if (cmd == OSIOCGIFCONF) { 2691 struct osockaddr *osa = 2692 (struct osockaddr *)&ifr.ifr_addr; 2693 ifr.ifr_addr = *sa; 2694 osa->sa_family = sa->sa_family; 2695 sbuf_bcat(sb, &ifr, sizeof(ifr)); 2696 max_len += sizeof(ifr); 2697 } else 2698 #endif 2699 if (sa->sa_len <= sizeof(*sa)) { 2700 ifr.ifr_addr = *sa; 2701 sbuf_bcat(sb, &ifr, sizeof(ifr)); 2702 max_len += sizeof(ifr); 2703 } else { 2704 sbuf_bcat(sb, &ifr, 2705 offsetof(struct ifreq, ifr_addr)); 2706 max_len += offsetof(struct ifreq, ifr_addr); 2707 sbuf_bcat(sb, sa, sa->sa_len); 2708 max_len += sa->sa_len; 2709 } 2710 2711 if (!sbuf_overflowed(sb)) 2712 valid_len = sbuf_len(sb); 2713 } 2714 IF_ADDR_UNLOCK(ifp); 2715 if (addrs == 0) { 2716 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr)); 2717 sbuf_bcat(sb, &ifr, sizeof(ifr)); 2718 max_len += sizeof(ifr); 2719 2720 if (!sbuf_overflowed(sb)) 2721 valid_len = sbuf_len(sb); 2722 } 2723 } 2724 IFNET_RUNLOCK(); 2725 2726 /* 2727 * If we didn't allocate enough space (uncommon), try again. If 2728 * we have already allocated as much space as we are allowed, 2729 * return what we've got. 2730 */ 2731 if (valid_len != max_len && !full) { 2732 sbuf_delete(sb); 2733 goto again; 2734 } 2735 2736 ifc->ifc_len = valid_len; 2737 #ifdef __amd64__ 2738 if (cmd == SIOCGIFCONF32) 2739 ifc32->ifc_len = valid_len; 2740 #endif 2741 sbuf_finish(sb); 2742 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len); 2743 sbuf_delete(sb); 2744 return (error); 2745 } 2746 2747 /* 2748 * Just like ifpromisc(), but for all-multicast-reception mode. 2749 */ 2750 int 2751 if_allmulti(struct ifnet *ifp, int onswitch) 2752 { 2753 2754 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch)); 2755 } 2756 2757 struct ifmultiaddr * 2758 if_findmulti(struct ifnet *ifp, struct sockaddr *sa) 2759 { 2760 struct ifmultiaddr *ifma; 2761 2762 IF_ADDR_LOCK_ASSERT(ifp); 2763 2764 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2765 if (sa->sa_family == AF_LINK) { 2766 if (sa_dl_equal(ifma->ifma_addr, sa)) 2767 break; 2768 } else { 2769 if (sa_equal(ifma->ifma_addr, sa)) 2770 break; 2771 } 2772 } 2773 2774 return ifma; 2775 } 2776 2777 /* 2778 * Allocate a new ifmultiaddr and initialize based on passed arguments. We 2779 * make copies of passed sockaddrs. The ifmultiaddr will not be added to 2780 * the ifnet multicast address list here, so the caller must do that and 2781 * other setup work (such as notifying the device driver). The reference 2782 * count is initialized to 1. 2783 */ 2784 static struct ifmultiaddr * 2785 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa, 2786 int mflags) 2787 { 2788 struct ifmultiaddr *ifma; 2789 struct sockaddr *dupsa; 2790 2791 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags | 2792 M_ZERO); 2793 if (ifma == NULL) 2794 return (NULL); 2795 2796 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags); 2797 if (dupsa == NULL) { 2798 free(ifma, M_IFMADDR); 2799 return (NULL); 2800 } 2801 bcopy(sa, dupsa, sa->sa_len); 2802 ifma->ifma_addr = dupsa; 2803 2804 ifma->ifma_ifp = ifp; 2805 ifma->ifma_refcount = 1; 2806 ifma->ifma_protospec = NULL; 2807 2808 if (llsa == NULL) { 2809 ifma->ifma_lladdr = NULL; 2810 return (ifma); 2811 } 2812 2813 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags); 2814 if (dupsa == NULL) { 2815 free(ifma->ifma_addr, M_IFMADDR); 2816 free(ifma, M_IFMADDR); 2817 return (NULL); 2818 } 2819 bcopy(llsa, dupsa, llsa->sa_len); 2820 ifma->ifma_lladdr = dupsa; 2821 2822 return (ifma); 2823 } 2824 2825 /* 2826 * if_freemulti: free ifmultiaddr structure and possibly attached related 2827 * addresses. The caller is responsible for implementing reference 2828 * counting, notifying the driver, handling routing messages, and releasing 2829 * any dependent link layer state. 2830 */ 2831 static void 2832 if_freemulti(struct ifmultiaddr *ifma) 2833 { 2834 2835 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d", 2836 ifma->ifma_refcount)); 2837 KASSERT(ifma->ifma_protospec == NULL, 2838 ("if_freemulti: protospec not NULL")); 2839 2840 if (ifma->ifma_lladdr != NULL) 2841 free(ifma->ifma_lladdr, M_IFMADDR); 2842 free(ifma->ifma_addr, M_IFMADDR); 2843 free(ifma, M_IFMADDR); 2844 } 2845 2846 /* 2847 * Register an additional multicast address with a network interface. 2848 * 2849 * - If the address is already present, bump the reference count on the 2850 * address and return. 2851 * - If the address is not link-layer, look up a link layer address. 2852 * - Allocate address structures for one or both addresses, and attach to the 2853 * multicast address list on the interface. If automatically adding a link 2854 * layer address, the protocol address will own a reference to the link 2855 * layer address, to be freed when it is freed. 2856 * - Notify the network device driver of an addition to the multicast address 2857 * list. 2858 * 2859 * 'sa' points to caller-owned memory with the desired multicast address. 2860 * 2861 * 'retifma' will be used to return a pointer to the resulting multicast 2862 * address reference, if desired. 2863 */ 2864 int 2865 if_addmulti(struct ifnet *ifp, struct sockaddr *sa, 2866 struct ifmultiaddr **retifma) 2867 { 2868 struct ifmultiaddr *ifma, *ll_ifma; 2869 struct sockaddr *llsa; 2870 int error; 2871 2872 /* 2873 * If the address is already present, return a new reference to it; 2874 * otherwise, allocate storage and set up a new address. 2875 */ 2876 IF_ADDR_LOCK(ifp); 2877 ifma = if_findmulti(ifp, sa); 2878 if (ifma != NULL) { 2879 ifma->ifma_refcount++; 2880 if (retifma != NULL) 2881 *retifma = ifma; 2882 IF_ADDR_UNLOCK(ifp); 2883 return (0); 2884 } 2885 2886 /* 2887 * The address isn't already present; resolve the protocol address 2888 * into a link layer address, and then look that up, bump its 2889 * refcount or allocate an ifma for that also. If 'llsa' was 2890 * returned, we will need to free it later. 2891 */ 2892 llsa = NULL; 2893 ll_ifma = NULL; 2894 if (ifp->if_resolvemulti != NULL) { 2895 error = ifp->if_resolvemulti(ifp, &llsa, sa); 2896 if (error) 2897 goto unlock_out; 2898 } 2899 2900 /* 2901 * Allocate the new address. Don't hook it up yet, as we may also 2902 * need to allocate a link layer multicast address. 2903 */ 2904 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT); 2905 if (ifma == NULL) { 2906 error = ENOMEM; 2907 goto free_llsa_out; 2908 } 2909 2910 /* 2911 * If a link layer address is found, we'll need to see if it's 2912 * already present in the address list, or allocate is as well. 2913 * When this block finishes, the link layer address will be on the 2914 * list. 2915 */ 2916 if (llsa != NULL) { 2917 ll_ifma = if_findmulti(ifp, llsa); 2918 if (ll_ifma == NULL) { 2919 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT); 2920 if (ll_ifma == NULL) { 2921 --ifma->ifma_refcount; 2922 if_freemulti(ifma); 2923 error = ENOMEM; 2924 goto free_llsa_out; 2925 } 2926 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma, 2927 ifma_link); 2928 } else 2929 ll_ifma->ifma_refcount++; 2930 ifma->ifma_llifma = ll_ifma; 2931 } 2932 2933 /* 2934 * We now have a new multicast address, ifma, and possibly a new or 2935 * referenced link layer address. Add the primary address to the 2936 * ifnet address list. 2937 */ 2938 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 2939 2940 if (retifma != NULL) 2941 *retifma = ifma; 2942 2943 /* 2944 * Must generate the message while holding the lock so that 'ifma' 2945 * pointer is still valid. 2946 */ 2947 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 2948 IF_ADDR_UNLOCK(ifp); 2949 2950 /* 2951 * We are certain we have added something, so call down to the 2952 * interface to let them know about it. 2953 */ 2954 if (ifp->if_ioctl != NULL) { 2955 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0); 2956 } 2957 2958 if (llsa != NULL) 2959 free(llsa, M_IFMADDR); 2960 2961 return (0); 2962 2963 free_llsa_out: 2964 if (llsa != NULL) 2965 free(llsa, M_IFMADDR); 2966 2967 unlock_out: 2968 IF_ADDR_UNLOCK(ifp); 2969 return (error); 2970 } 2971 2972 /* 2973 * Delete a multicast group membership by network-layer group address. 2974 * 2975 * Returns ENOENT if the entry could not be found. If ifp no longer 2976 * exists, results are undefined. This entry point should only be used 2977 * from subsystems which do appropriate locking to hold ifp for the 2978 * duration of the call. 2979 * Network-layer protocol domains must use if_delmulti_ifma(). 2980 */ 2981 int 2982 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 2983 { 2984 struct ifmultiaddr *ifma; 2985 int lastref; 2986 #ifdef INVARIANTS 2987 struct ifnet *oifp; 2988 2989 IFNET_RLOCK_NOSLEEP(); 2990 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 2991 if (ifp == oifp) 2992 break; 2993 if (ifp != oifp) 2994 ifp = NULL; 2995 IFNET_RUNLOCK_NOSLEEP(); 2996 2997 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__)); 2998 #endif 2999 if (ifp == NULL) 3000 return (ENOENT); 3001 3002 IF_ADDR_LOCK(ifp); 3003 lastref = 0; 3004 ifma = if_findmulti(ifp, sa); 3005 if (ifma != NULL) 3006 lastref = if_delmulti_locked(ifp, ifma, 0); 3007 IF_ADDR_UNLOCK(ifp); 3008 3009 if (ifma == NULL) 3010 return (ENOENT); 3011 3012 if (lastref && ifp->if_ioctl != NULL) { 3013 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3014 } 3015 3016 return (0); 3017 } 3018 3019 /* 3020 * Delete all multicast group membership for an interface. 3021 * Should be used to quickly flush all multicast filters. 3022 */ 3023 void 3024 if_delallmulti(struct ifnet *ifp) 3025 { 3026 struct ifmultiaddr *ifma; 3027 struct ifmultiaddr *next; 3028 3029 IF_ADDR_LOCK(ifp); 3030 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 3031 if_delmulti_locked(ifp, ifma, 0); 3032 IF_ADDR_UNLOCK(ifp); 3033 } 3034 3035 /* 3036 * Delete a multicast group membership by group membership pointer. 3037 * Network-layer protocol domains must use this routine. 3038 * 3039 * It is safe to call this routine if the ifp disappeared. 3040 */ 3041 void 3042 if_delmulti_ifma(struct ifmultiaddr *ifma) 3043 { 3044 struct ifnet *ifp; 3045 int lastref; 3046 3047 ifp = ifma->ifma_ifp; 3048 #ifdef DIAGNOSTIC 3049 if (ifp == NULL) { 3050 printf("%s: ifma_ifp seems to be detached\n", __func__); 3051 } else { 3052 struct ifnet *oifp; 3053 3054 IFNET_RLOCK_NOSLEEP(); 3055 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3056 if (ifp == oifp) 3057 break; 3058 if (ifp != oifp) { 3059 printf("%s: ifnet %p disappeared\n", __func__, ifp); 3060 ifp = NULL; 3061 } 3062 IFNET_RUNLOCK_NOSLEEP(); 3063 } 3064 #endif 3065 /* 3066 * If and only if the ifnet instance exists: Acquire the address lock. 3067 */ 3068 if (ifp != NULL) 3069 IF_ADDR_LOCK(ifp); 3070 3071 lastref = if_delmulti_locked(ifp, ifma, 0); 3072 3073 if (ifp != NULL) { 3074 /* 3075 * If and only if the ifnet instance exists: 3076 * Release the address lock. 3077 * If the group was left: update the hardware hash filter. 3078 */ 3079 IF_ADDR_UNLOCK(ifp); 3080 if (lastref && ifp->if_ioctl != NULL) { 3081 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3082 } 3083 } 3084 } 3085 3086 /* 3087 * Perform deletion of network-layer and/or link-layer multicast address. 3088 * 3089 * Return 0 if the reference count was decremented. 3090 * Return 1 if the final reference was released, indicating that the 3091 * hardware hash filter should be reprogrammed. 3092 */ 3093 static int 3094 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching) 3095 { 3096 struct ifmultiaddr *ll_ifma; 3097 3098 if (ifp != NULL && ifma->ifma_ifp != NULL) { 3099 KASSERT(ifma->ifma_ifp == ifp, 3100 ("%s: inconsistent ifp %p", __func__, ifp)); 3101 IF_ADDR_LOCK_ASSERT(ifp); 3102 } 3103 3104 ifp = ifma->ifma_ifp; 3105 3106 /* 3107 * If the ifnet is detaching, null out references to ifnet, 3108 * so that upper protocol layers will notice, and not attempt 3109 * to obtain locks for an ifnet which no longer exists. The 3110 * routing socket announcement must happen before the ifnet 3111 * instance is detached from the system. 3112 */ 3113 if (detaching) { 3114 #ifdef DIAGNOSTIC 3115 printf("%s: detaching ifnet instance %p\n", __func__, ifp); 3116 #endif 3117 /* 3118 * ifp may already be nulled out if we are being reentered 3119 * to delete the ll_ifma. 3120 */ 3121 if (ifp != NULL) { 3122 rt_newmaddrmsg(RTM_DELMADDR, ifma); 3123 ifma->ifma_ifp = NULL; 3124 } 3125 } 3126 3127 if (--ifma->ifma_refcount > 0) 3128 return 0; 3129 3130 /* 3131 * If this ifma is a network-layer ifma, a link-layer ifma may 3132 * have been associated with it. Release it first if so. 3133 */ 3134 ll_ifma = ifma->ifma_llifma; 3135 if (ll_ifma != NULL) { 3136 KASSERT(ifma->ifma_lladdr != NULL, 3137 ("%s: llifma w/o lladdr", __func__)); 3138 if (detaching) 3139 ll_ifma->ifma_ifp = NULL; /* XXX */ 3140 if (--ll_ifma->ifma_refcount == 0) { 3141 if (ifp != NULL) { 3142 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, 3143 ifma_link); 3144 } 3145 if_freemulti(ll_ifma); 3146 } 3147 } 3148 3149 if (ifp != NULL) 3150 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 3151 3152 if_freemulti(ifma); 3153 3154 /* 3155 * The last reference to this instance of struct ifmultiaddr 3156 * was released; the hardware should be notified of this change. 3157 */ 3158 return 1; 3159 } 3160 3161 /* 3162 * Set the link layer address on an interface. 3163 * 3164 * At this time we only support certain types of interfaces, 3165 * and we don't allow the length of the address to change. 3166 */ 3167 int 3168 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 3169 { 3170 struct sockaddr_dl *sdl; 3171 struct ifaddr *ifa; 3172 struct ifreq ifr; 3173 3174 IF_ADDR_LOCK(ifp); 3175 ifa = ifp->if_addr; 3176 if (ifa == NULL) { 3177 IF_ADDR_UNLOCK(ifp); 3178 return (EINVAL); 3179 } 3180 ifa_ref(ifa); 3181 IF_ADDR_UNLOCK(ifp); 3182 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 3183 if (sdl == NULL) { 3184 ifa_free(ifa); 3185 return (EINVAL); 3186 } 3187 if (len != sdl->sdl_alen) { /* don't allow length to change */ 3188 ifa_free(ifa); 3189 return (EINVAL); 3190 } 3191 switch (ifp->if_type) { 3192 case IFT_ETHER: 3193 case IFT_FDDI: 3194 case IFT_XETHER: 3195 case IFT_ISO88025: 3196 case IFT_L2VLAN: 3197 case IFT_BRIDGE: 3198 case IFT_ARCNET: 3199 case IFT_IEEE8023ADLAG: 3200 case IFT_IEEE80211: 3201 bcopy(lladdr, LLADDR(sdl), len); 3202 ifa_free(ifa); 3203 break; 3204 default: 3205 ifa_free(ifa); 3206 return (ENODEV); 3207 } 3208 3209 /* 3210 * If the interface is already up, we need 3211 * to re-init it in order to reprogram its 3212 * address filter. 3213 */ 3214 if ((ifp->if_flags & IFF_UP) != 0) { 3215 if (ifp->if_ioctl) { 3216 ifp->if_flags &= ~IFF_UP; 3217 ifr.ifr_flags = ifp->if_flags & 0xffff; 3218 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3219 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3220 ifp->if_flags |= IFF_UP; 3221 ifr.ifr_flags = ifp->if_flags & 0xffff; 3222 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3223 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3224 } 3225 #ifdef INET 3226 /* 3227 * Also send gratuitous ARPs to notify other nodes about 3228 * the address change. 3229 */ 3230 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 3231 if (ifa->ifa_addr->sa_family == AF_INET) 3232 arp_ifinit(ifp, ifa); 3233 } 3234 #endif 3235 } 3236 return (0); 3237 } 3238 3239 /* 3240 * The name argument must be a pointer to storage which will last as 3241 * long as the interface does. For physical devices, the result of 3242 * device_get_name(dev) is a good choice and for pseudo-devices a 3243 * static string works well. 3244 */ 3245 void 3246 if_initname(struct ifnet *ifp, const char *name, int unit) 3247 { 3248 ifp->if_dname = name; 3249 ifp->if_dunit = unit; 3250 if (unit != IF_DUNIT_NONE) 3251 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 3252 else 3253 strlcpy(ifp->if_xname, name, IFNAMSIZ); 3254 } 3255 3256 int 3257 if_printf(struct ifnet *ifp, const char * fmt, ...) 3258 { 3259 va_list ap; 3260 int retval; 3261 3262 retval = printf("%s: ", ifp->if_xname); 3263 va_start(ap, fmt); 3264 retval += vprintf(fmt, ap); 3265 va_end(ap); 3266 return (retval); 3267 } 3268 3269 void 3270 if_start(struct ifnet *ifp) 3271 { 3272 3273 (*(ifp)->if_start)(ifp); 3274 } 3275 3276 /* 3277 * Backwards compatibility interface for drivers 3278 * that have not implemented it 3279 */ 3280 static int 3281 if_transmit(struct ifnet *ifp, struct mbuf *m) 3282 { 3283 int error; 3284 3285 IFQ_HANDOFF(ifp, m, error); 3286 return (error); 3287 } 3288 3289 int 3290 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust) 3291 { 3292 int active = 0; 3293 3294 IF_LOCK(ifq); 3295 if (_IF_QFULL(ifq)) { 3296 _IF_DROP(ifq); 3297 IF_UNLOCK(ifq); 3298 m_freem(m); 3299 return (0); 3300 } 3301 if (ifp != NULL) { 3302 ifp->if_obytes += m->m_pkthdr.len + adjust; 3303 if (m->m_flags & (M_BCAST|M_MCAST)) 3304 ifp->if_omcasts++; 3305 active = ifp->if_drv_flags & IFF_DRV_OACTIVE; 3306 } 3307 _IF_ENQUEUE(ifq, m); 3308 IF_UNLOCK(ifq); 3309 if (ifp != NULL && !active) 3310 (*(ifp)->if_start)(ifp); 3311 return (1); 3312 } 3313 3314 void 3315 if_register_com_alloc(u_char type, 3316 if_com_alloc_t *a, if_com_free_t *f) 3317 { 3318 3319 KASSERT(if_com_alloc[type] == NULL, 3320 ("if_register_com_alloc: %d already registered", type)); 3321 KASSERT(if_com_free[type] == NULL, 3322 ("if_register_com_alloc: %d free already registered", type)); 3323 3324 if_com_alloc[type] = a; 3325 if_com_free[type] = f; 3326 } 3327 3328 void 3329 if_deregister_com_alloc(u_char type) 3330 { 3331 3332 KASSERT(if_com_alloc[type] != NULL, 3333 ("if_deregister_com_alloc: %d not registered", type)); 3334 KASSERT(if_com_free[type] != NULL, 3335 ("if_deregister_com_alloc: %d free not registered", type)); 3336 if_com_alloc[type] = NULL; 3337 if_com_free[type] = NULL; 3338 } 3339 3340 #ifdef DDB 3341 static void 3342 if_show_ifnet(struct ifnet *ifp) 3343 { 3344 3345 if (ifp == NULL) 3346 return; 3347 db_printf("%s:\n", ifp->if_xname); 3348 #define IF_DB_PRINTF(f, e) db_printf(" %s = " f "\n", #e, ifp->e); 3349 IF_DB_PRINTF("%s", if_dname); 3350 IF_DB_PRINTF("%d", if_dunit); 3351 IF_DB_PRINTF("%s", if_description); 3352 IF_DB_PRINTF("%u", if_index); 3353 IF_DB_PRINTF("%u", if_refcount); 3354 IF_DB_PRINTF("%d", if_index_reserved); 3355 IF_DB_PRINTF("%p", if_softc); 3356 IF_DB_PRINTF("%p", if_l2com); 3357 IF_DB_PRINTF("%p", if_vnet); 3358 IF_DB_PRINTF("%p", if_home_vnet); 3359 IF_DB_PRINTF("%p", if_addr); 3360 IF_DB_PRINTF("%p", if_llsoftc); 3361 IF_DB_PRINTF("%p", if_label); 3362 IF_DB_PRINTF("%u", if_pcount); 3363 IF_DB_PRINTF("0x%08x", if_flags); 3364 IF_DB_PRINTF("0x%08x", if_drv_flags); 3365 IF_DB_PRINTF("0x%08x", if_capabilities); 3366 IF_DB_PRINTF("0x%08x", if_capenable); 3367 IF_DB_PRINTF("%p", if_snd.ifq_head); 3368 IF_DB_PRINTF("%p", if_snd.ifq_tail); 3369 IF_DB_PRINTF("%d", if_snd.ifq_len); 3370 IF_DB_PRINTF("%d", if_snd.ifq_maxlen); 3371 IF_DB_PRINTF("%d", if_snd.ifq_drops); 3372 IF_DB_PRINTF("%p", if_snd.ifq_drv_head); 3373 IF_DB_PRINTF("%p", if_snd.ifq_drv_tail); 3374 IF_DB_PRINTF("%d", if_snd.ifq_drv_len); 3375 IF_DB_PRINTF("%d", if_snd.ifq_drv_maxlen); 3376 IF_DB_PRINTF("%d", if_snd.altq_type); 3377 IF_DB_PRINTF("%x", if_snd.altq_flags); 3378 #undef IF_DB_PRINTF 3379 } 3380 3381 DB_SHOW_COMMAND(ifnet, db_show_ifnet) 3382 { 3383 3384 if (!have_addr) { 3385 db_printf("usage: show ifnet <struct ifnet *>\n"); 3386 return; 3387 } 3388 3389 if_show_ifnet((struct ifnet *)addr); 3390 } 3391 3392 DB_SHOW_ALL_COMMAND(ifnets, db_show_all_ifnets) 3393 { 3394 VNET_ITERATOR_DECL(vnet_iter); 3395 struct ifnet *ifp; 3396 u_short idx; 3397 3398 VNET_FOREACH(vnet_iter) { 3399 CURVNET_SET_QUIET(vnet_iter); 3400 #ifdef VIMAGE 3401 db_printf("vnet=%p\n", curvnet); 3402 #endif 3403 for (idx = 1; idx <= V_if_index; idx++) { 3404 ifp = V_ifindex_table[idx].ife_ifnet; 3405 if (ifp == NULL) 3406 continue; 3407 db_printf( "%20s ifp=%p\n", ifp->if_xname, ifp); 3408 if (db_pager_quit) 3409 break; 3410 } 3411 CURVNET_RESTORE(); 3412 } 3413 } 3414 #endif 3415