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