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 37 #include <sys/param.h> 38 #include <sys/types.h> 39 #include <sys/conf.h> 40 #include <sys/malloc.h> 41 #include <sys/sbuf.h> 42 #include <sys/bus.h> 43 #include <sys/mbuf.h> 44 #include <sys/systm.h> 45 #include <sys/priv.h> 46 #include <sys/proc.h> 47 #include <sys/socket.h> 48 #include <sys/socketvar.h> 49 #include <sys/protosw.h> 50 #include <sys/kernel.h> 51 #include <sys/lock.h> 52 #include <sys/refcount.h> 53 #include <sys/module.h> 54 #include <sys/rwlock.h> 55 #include <sys/sockio.h> 56 #include <sys/syslog.h> 57 #include <sys/sysctl.h> 58 #include <sys/taskqueue.h> 59 #include <sys/domain.h> 60 #include <sys/jail.h> 61 #include <sys/priv.h> 62 63 #include <machine/stdarg.h> 64 #include <vm/uma.h> 65 66 #include <net/bpf.h> 67 #include <net/ethernet.h> 68 #include <net/if.h> 69 #include <net/if_arp.h> 70 #include <net/if_clone.h> 71 #include <net/if_dl.h> 72 #include <net/if_types.h> 73 #include <net/if_var.h> 74 #include <net/if_media.h> 75 #include <net/if_vlan_var.h> 76 #include <net/radix.h> 77 #include <net/route.h> 78 #include <net/vnet.h> 79 80 #if defined(INET) || defined(INET6) 81 #include <net/ethernet.h> 82 #include <netinet/in.h> 83 #include <netinet/in_var.h> 84 #include <netinet/ip.h> 85 #include <netinet/ip_carp.h> 86 #ifdef INET 87 #include <netinet/if_ether.h> 88 #endif /* INET */ 89 #ifdef INET6 90 #include <netinet6/in6_var.h> 91 #include <netinet6/in6_ifattach.h> 92 #endif /* INET6 */ 93 #endif /* INET || INET6 */ 94 95 #include <security/mac/mac_framework.h> 96 97 #ifdef COMPAT_FREEBSD32 98 #include <sys/mount.h> 99 #include <compat/freebsd32/freebsd32.h> 100 #endif 101 102 struct ifindex_entry { 103 struct ifnet *ife_ifnet; 104 }; 105 106 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers"); 107 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management"); 108 109 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN, 110 &ifqmaxlen, 0, "max send queue size"); 111 112 /* Log link state change events */ 113 static int log_link_state_change = 1; 114 115 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW, 116 &log_link_state_change, 0, 117 "log interface link state change events"); 118 119 /* Interface description */ 120 static unsigned int ifdescr_maxlen = 1024; 121 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW, 122 &ifdescr_maxlen, 0, 123 "administrative maximum length for interface description"); 124 125 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions"); 126 127 /* global sx for non-critical path ifdescr */ 128 static struct sx ifdescr_sx; 129 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr"); 130 131 void (*bridge_linkstate_p)(struct ifnet *ifp); 132 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state); 133 void (*lagg_linkstate_p)(struct ifnet *ifp, int state); 134 /* These are external hooks for CARP. */ 135 void (*carp_linkstate_p)(struct ifnet *ifp); 136 void (*carp_demote_adj_p)(int, char *); 137 int (*carp_master_p)(struct ifaddr *); 138 #if defined(INET) || defined(INET6) 139 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost); 140 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m, 141 const struct sockaddr *sa); 142 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *); 143 int (*carp_attach_p)(struct ifaddr *, int); 144 void (*carp_detach_p)(struct ifaddr *); 145 #endif 146 #ifdef INET 147 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **); 148 #endif 149 #ifdef INET6 150 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6); 151 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m, 152 const struct in6_addr *taddr); 153 #endif 154 155 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL; 156 157 /* 158 * XXX: Style; these should be sorted alphabetically, and unprototyped 159 * static functions should be prototyped. Currently they are sorted by 160 * declaration order. 161 */ 162 static void if_attachdomain(void *); 163 static void if_attachdomain1(struct ifnet *); 164 static int ifconf(u_long, caddr_t); 165 static void if_freemulti(struct ifmultiaddr *); 166 static void if_init(void *); 167 static void if_grow(void); 168 static void if_route(struct ifnet *, int flag, int fam); 169 static int if_setflag(struct ifnet *, int, int, int *, int); 170 static int if_transmit(struct ifnet *ifp, struct mbuf *m); 171 static void if_unroute(struct ifnet *, int flag, int fam); 172 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 173 static int if_rtdel(struct radix_node *, void *); 174 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *); 175 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int); 176 static void do_link_state_change(void *, int); 177 static int if_getgroup(struct ifgroupreq *, struct ifnet *); 178 static int if_getgroupmembers(struct ifgroupreq *); 179 static void if_delgroups(struct ifnet *); 180 static void if_attach_internal(struct ifnet *, int); 181 static void if_detach_internal(struct ifnet *, int); 182 183 #ifdef INET6 184 /* 185 * XXX: declare here to avoid to include many inet6 related files.. 186 * should be more generalized? 187 */ 188 extern void nd6_setmtu(struct ifnet *); 189 #endif 190 191 VNET_DEFINE(int, if_index); 192 int ifqmaxlen = IFQ_MAXLEN; 193 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */ 194 VNET_DEFINE(struct ifgrouphead, ifg_head); 195 196 static VNET_DEFINE(int, if_indexlim) = 8; 197 198 /* Table of ifnet by index. */ 199 VNET_DEFINE(struct ifindex_entry *, ifindex_table); 200 201 #define V_if_indexlim VNET(if_indexlim) 202 #define V_ifindex_table VNET(ifindex_table) 203 204 /* 205 * The global network interface list (V_ifnet) and related state (such as 206 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and 207 * an rwlock. Either may be acquired shared to stablize the list, but both 208 * must be acquired writable to modify the list. This model allows us to 209 * both stablize the interface list during interrupt thread processing, but 210 * also to stablize it over long-running ioctls, without introducing priority 211 * inversions and deadlocks. 212 */ 213 struct rwlock ifnet_rwlock; 214 struct sx ifnet_sxlock; 215 216 /* 217 * The allocation of network interfaces is a rather non-atomic affair; we 218 * need to select an index before we are ready to expose the interface for 219 * use, so will use this pointer value to indicate reservation. 220 */ 221 #define IFNET_HOLD (void *)(uintptr_t)(-1) 222 223 static if_com_alloc_t *if_com_alloc[256]; 224 static if_com_free_t *if_com_free[256]; 225 226 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals"); 227 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 228 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 229 230 struct ifnet * 231 ifnet_byindex_locked(u_short idx) 232 { 233 234 if (idx > V_if_index) 235 return (NULL); 236 if (V_ifindex_table[idx].ife_ifnet == IFNET_HOLD) 237 return (NULL); 238 return (V_ifindex_table[idx].ife_ifnet); 239 } 240 241 struct ifnet * 242 ifnet_byindex(u_short idx) 243 { 244 struct ifnet *ifp; 245 246 IFNET_RLOCK_NOSLEEP(); 247 ifp = ifnet_byindex_locked(idx); 248 IFNET_RUNLOCK_NOSLEEP(); 249 return (ifp); 250 } 251 252 struct ifnet * 253 ifnet_byindex_ref(u_short idx) 254 { 255 struct ifnet *ifp; 256 257 IFNET_RLOCK_NOSLEEP(); 258 ifp = ifnet_byindex_locked(idx); 259 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) { 260 IFNET_RUNLOCK_NOSLEEP(); 261 return (NULL); 262 } 263 if_ref(ifp); 264 IFNET_RUNLOCK_NOSLEEP(); 265 return (ifp); 266 } 267 268 /* 269 * Allocate an ifindex array entry; return 0 on success or an error on 270 * failure. 271 */ 272 static int 273 ifindex_alloc_locked(u_short *idxp) 274 { 275 u_short idx; 276 277 IFNET_WLOCK_ASSERT(); 278 279 retry: 280 /* 281 * Try to find an empty slot below V_if_index. If we fail, take the 282 * next slot. 283 */ 284 for (idx = 1; idx <= V_if_index; idx++) { 285 if (V_ifindex_table[idx].ife_ifnet == NULL) 286 break; 287 } 288 289 /* Catch if_index overflow. */ 290 if (idx >= V_if_indexlim) { 291 if_grow(); 292 goto retry; 293 } 294 if (idx > V_if_index) 295 V_if_index = idx; 296 *idxp = idx; 297 return (0); 298 } 299 300 static void 301 ifindex_free_locked(u_short idx) 302 { 303 304 IFNET_WLOCK_ASSERT(); 305 306 V_ifindex_table[idx].ife_ifnet = NULL; 307 while (V_if_index > 0 && 308 V_ifindex_table[V_if_index].ife_ifnet == NULL) 309 V_if_index--; 310 } 311 312 static void 313 ifindex_free(u_short idx) 314 { 315 316 IFNET_WLOCK(); 317 ifindex_free_locked(idx); 318 IFNET_WUNLOCK(); 319 } 320 321 static void 322 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp) 323 { 324 325 IFNET_WLOCK_ASSERT(); 326 327 V_ifindex_table[idx].ife_ifnet = ifp; 328 } 329 330 static void 331 ifnet_setbyindex(u_short idx, struct ifnet *ifp) 332 { 333 334 IFNET_WLOCK(); 335 ifnet_setbyindex_locked(idx, ifp); 336 IFNET_WUNLOCK(); 337 } 338 339 struct ifaddr * 340 ifaddr_byindex(u_short idx) 341 { 342 struct ifaddr *ifa; 343 344 IFNET_RLOCK_NOSLEEP(); 345 ifa = ifnet_byindex_locked(idx)->if_addr; 346 if (ifa != NULL) 347 ifa_ref(ifa); 348 IFNET_RUNLOCK_NOSLEEP(); 349 return (ifa); 350 } 351 352 /* 353 * Network interface utility routines. 354 * 355 * Routines with ifa_ifwith* names take sockaddr *'s as 356 * parameters. 357 */ 358 359 static void 360 vnet_if_init(const void *unused __unused) 361 { 362 363 TAILQ_INIT(&V_ifnet); 364 TAILQ_INIT(&V_ifg_head); 365 IFNET_WLOCK(); 366 if_grow(); /* create initial table */ 367 IFNET_WUNLOCK(); 368 vnet_if_clone_init(); 369 } 370 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init, 371 NULL); 372 373 /* ARGSUSED*/ 374 static void 375 if_init(void *dummy __unused) 376 { 377 378 IFNET_LOCK_INIT(); 379 if_clone_init(); 380 } 381 SYSINIT(interfaces, SI_SUB_INIT_IF, SI_ORDER_FIRST, if_init, NULL); 382 383 384 #ifdef VIMAGE 385 static void 386 vnet_if_uninit(const void *unused __unused) 387 { 388 389 VNET_ASSERT(TAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p " 390 "not empty", __func__, __LINE__, &V_ifnet)); 391 VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p " 392 "not empty", __func__, __LINE__, &V_ifg_head)); 393 394 free((caddr_t)V_ifindex_table, M_IFNET); 395 } 396 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST, 397 vnet_if_uninit, NULL); 398 #endif 399 400 static void 401 if_grow(void) 402 { 403 int oldlim; 404 u_int n; 405 struct ifindex_entry *e; 406 407 IFNET_WLOCK_ASSERT(); 408 oldlim = V_if_indexlim; 409 IFNET_WUNLOCK(); 410 n = (oldlim << 1) * sizeof(*e); 411 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO); 412 IFNET_WLOCK(); 413 if (V_if_indexlim != oldlim) { 414 free(e, M_IFNET); 415 return; 416 } 417 if (V_ifindex_table != NULL) { 418 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2); 419 free((caddr_t)V_ifindex_table, M_IFNET); 420 } 421 V_if_indexlim <<= 1; 422 V_ifindex_table = e; 423 } 424 425 /* 426 * Allocate a struct ifnet and an index for an interface. A layer 2 427 * common structure will also be allocated if an allocation routine is 428 * registered for the passed type. 429 */ 430 struct ifnet * 431 if_alloc(u_char type) 432 { 433 struct ifnet *ifp; 434 u_short idx; 435 436 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO); 437 IFNET_WLOCK(); 438 if (ifindex_alloc_locked(&idx) != 0) { 439 IFNET_WUNLOCK(); 440 free(ifp, M_IFNET); 441 return (NULL); 442 } 443 ifnet_setbyindex_locked(idx, IFNET_HOLD); 444 IFNET_WUNLOCK(); 445 ifp->if_index = idx; 446 ifp->if_type = type; 447 ifp->if_alloctype = type; 448 if (if_com_alloc[type] != NULL) { 449 ifp->if_l2com = if_com_alloc[type](type, ifp); 450 if (ifp->if_l2com == NULL) { 451 free(ifp, M_IFNET); 452 ifindex_free(idx); 453 return (NULL); 454 } 455 } 456 457 IF_ADDR_LOCK_INIT(ifp); 458 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp); 459 ifp->if_afdata_initialized = 0; 460 IF_AFDATA_LOCK_INIT(ifp); 461 TAILQ_INIT(&ifp->if_addrhead); 462 TAILQ_INIT(&ifp->if_multiaddrs); 463 TAILQ_INIT(&ifp->if_groups); 464 #ifdef MAC 465 mac_ifnet_init(ifp); 466 #endif 467 ifq_init(&ifp->if_snd, ifp); 468 469 refcount_init(&ifp->if_refcount, 1); /* Index reference. */ 470 ifnet_setbyindex(ifp->if_index, ifp); 471 return (ifp); 472 } 473 474 /* 475 * Do the actual work of freeing a struct ifnet, and layer 2 common 476 * structure. This call is made when the last reference to an 477 * interface is released. 478 */ 479 static void 480 if_free_internal(struct ifnet *ifp) 481 { 482 483 KASSERT((ifp->if_flags & IFF_DYING), 484 ("if_free_internal: interface not dying")); 485 486 if (if_com_free[ifp->if_alloctype] != NULL) 487 if_com_free[ifp->if_alloctype](ifp->if_l2com, 488 ifp->if_alloctype); 489 490 #ifdef MAC 491 mac_ifnet_destroy(ifp); 492 #endif /* MAC */ 493 if (ifp->if_description != NULL) 494 free(ifp->if_description, M_IFDESCR); 495 IF_AFDATA_DESTROY(ifp); 496 IF_ADDR_LOCK_DESTROY(ifp); 497 ifq_delete(&ifp->if_snd); 498 free(ifp, M_IFNET); 499 } 500 501 /* 502 * Deregister an interface and free the associated storage. 503 */ 504 void 505 if_free(struct ifnet *ifp) 506 { 507 508 ifp->if_flags |= IFF_DYING; /* XXX: Locking */ 509 510 CURVNET_SET_QUIET(ifp->if_vnet); 511 IFNET_WLOCK(); 512 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index), 513 ("%s: freeing unallocated ifnet", ifp->if_xname)); 514 515 ifindex_free_locked(ifp->if_index); 516 IFNET_WUNLOCK(); 517 518 if (refcount_release(&ifp->if_refcount)) 519 if_free_internal(ifp); 520 CURVNET_RESTORE(); 521 } 522 523 /* 524 * Interfaces to keep an ifnet type-stable despite the possibility of the 525 * driver calling if_free(). If there are additional references, we defer 526 * freeing the underlying data structure. 527 */ 528 void 529 if_ref(struct ifnet *ifp) 530 { 531 532 /* We don't assert the ifnet list lock here, but arguably should. */ 533 refcount_acquire(&ifp->if_refcount); 534 } 535 536 void 537 if_rele(struct ifnet *ifp) 538 { 539 540 if (!refcount_release(&ifp->if_refcount)) 541 return; 542 if_free_internal(ifp); 543 } 544 545 void 546 ifq_init(struct ifaltq *ifq, struct ifnet *ifp) 547 { 548 549 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF); 550 551 if (ifq->ifq_maxlen == 0) 552 ifq->ifq_maxlen = ifqmaxlen; 553 554 ifq->altq_type = 0; 555 ifq->altq_disc = NULL; 556 ifq->altq_flags &= ALTQF_CANTCHANGE; 557 ifq->altq_tbr = NULL; 558 ifq->altq_ifp = ifp; 559 } 560 561 void 562 ifq_delete(struct ifaltq *ifq) 563 { 564 mtx_destroy(&ifq->ifq_mtx); 565 } 566 567 /* 568 * Perform generic interface initalization tasks and attach the interface 569 * to the list of "active" interfaces. If vmove flag is set on entry 570 * to if_attach_internal(), perform only a limited subset of initialization 571 * tasks, given that we are moving from one vnet to another an ifnet which 572 * has already been fully initialized. 573 * 574 * XXX: 575 * - The decision to return void and thus require this function to 576 * succeed is questionable. 577 * - We should probably do more sanity checking. For instance we don't 578 * do anything to insure if_xname is unique or non-empty. 579 */ 580 void 581 if_attach(struct ifnet *ifp) 582 { 583 584 if_attach_internal(ifp, 0); 585 } 586 587 /* 588 * Compute the least common TSO limit. 589 */ 590 void 591 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax) 592 { 593 /* 594 * 1) If there is no limit currently, take the limit from 595 * the network adapter. 596 * 597 * 2) If the network adapter has a limit below the current 598 * limit, apply it. 599 */ 600 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 && 601 ifp->if_hw_tsomax < pmax->tsomaxbytes)) { 602 pmax->tsomaxbytes = ifp->if_hw_tsomax; 603 } 604 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 && 605 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) { 606 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount; 607 } 608 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 && 609 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) { 610 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize; 611 } 612 } 613 614 /* 615 * Update TSO limit of a network adapter. 616 * 617 * Returns zero if no change. Else non-zero. 618 */ 619 int 620 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax) 621 { 622 int retval = 0; 623 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) { 624 ifp->if_hw_tsomax = pmax->tsomaxbytes; 625 retval++; 626 } 627 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) { 628 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize; 629 retval++; 630 } 631 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) { 632 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount; 633 retval++; 634 } 635 return (retval); 636 } 637 638 static void 639 if_attach_internal(struct ifnet *ifp, int vmove) 640 { 641 unsigned socksize, ifasize; 642 int namelen, masklen; 643 struct sockaddr_dl *sdl; 644 struct ifaddr *ifa; 645 646 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index)) 647 panic ("%s: BUG: if_attach called without if_alloc'd input()\n", 648 ifp->if_xname); 649 650 #ifdef VIMAGE 651 ifp->if_vnet = curvnet; 652 if (ifp->if_home_vnet == NULL) 653 ifp->if_home_vnet = curvnet; 654 #endif 655 656 if_addgroup(ifp, IFG_ALL); 657 658 getmicrotime(&ifp->if_lastchange); 659 ifp->if_epoch = time_uptime; 660 661 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) || 662 (ifp->if_transmit != NULL && ifp->if_qflush != NULL), 663 ("transmit and qflush must both either be set or both be NULL")); 664 if (ifp->if_transmit == NULL) { 665 ifp->if_transmit = if_transmit; 666 ifp->if_qflush = if_qflush; 667 } 668 669 if (ifp->if_get_counter == NULL) 670 ifp->if_get_counter = if_get_counter_default; 671 672 if (!vmove) { 673 #ifdef MAC 674 mac_ifnet_create(ifp); 675 #endif 676 677 /* 678 * Create a Link Level name for this device. 679 */ 680 namelen = strlen(ifp->if_xname); 681 /* 682 * Always save enough space for any possiable name so we 683 * can do a rename in place later. 684 */ 685 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ; 686 socksize = masklen + ifp->if_addrlen; 687 if (socksize < sizeof(*sdl)) 688 socksize = sizeof(*sdl); 689 socksize = roundup2(socksize, sizeof(long)); 690 ifasize = sizeof(*ifa) + 2 * socksize; 691 ifa = ifa_alloc(ifasize, M_WAITOK); 692 sdl = (struct sockaddr_dl *)(ifa + 1); 693 sdl->sdl_len = socksize; 694 sdl->sdl_family = AF_LINK; 695 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 696 sdl->sdl_nlen = namelen; 697 sdl->sdl_index = ifp->if_index; 698 sdl->sdl_type = ifp->if_type; 699 ifp->if_addr = ifa; 700 ifa->ifa_ifp = ifp; 701 ifa->ifa_rtrequest = link_rtrequest; 702 ifa->ifa_addr = (struct sockaddr *)sdl; 703 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 704 ifa->ifa_netmask = (struct sockaddr *)sdl; 705 sdl->sdl_len = masklen; 706 while (namelen != 0) 707 sdl->sdl_data[--namelen] = 0xff; 708 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link); 709 /* Reliably crash if used uninitialized. */ 710 ifp->if_broadcastaddr = NULL; 711 712 #if defined(INET) || defined(INET6) 713 /* Use defaults for TSO, if nothing is set */ 714 if (ifp->if_hw_tsomax == 0 && 715 ifp->if_hw_tsomaxsegcount == 0 && 716 ifp->if_hw_tsomaxsegsize == 0) { 717 /* 718 * The TSO defaults needs to be such that an 719 * NFS mbuf list of 35 mbufs totalling just 720 * below 64K works and that a chain of mbufs 721 * can be defragged into at most 32 segments: 722 */ 723 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) - 724 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN)); 725 ifp->if_hw_tsomaxsegcount = 35; 726 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */ 727 728 /* XXX some drivers set IFCAP_TSO after ethernet attach */ 729 if (ifp->if_capabilities & IFCAP_TSO) { 730 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n", 731 ifp->if_hw_tsomax, 732 ifp->if_hw_tsomaxsegcount, 733 ifp->if_hw_tsomaxsegsize); 734 } 735 } 736 /* 737 * If the "if_hw_tsomax" limit is set, check if it is 738 * too small: 739 */ 740 KASSERT(ifp->if_hw_tsomax == 0 || 741 ifp->if_hw_tsomax >= (IP_MAXPACKET / 8), 742 ("%s: if_hw_tsomax is outside of range", __func__)); 743 #endif 744 } 745 #ifdef VIMAGE 746 else { 747 /* 748 * Update the interface index in the link layer address 749 * of the interface. 750 */ 751 for (ifa = ifp->if_addr; ifa != NULL; 752 ifa = TAILQ_NEXT(ifa, ifa_link)) { 753 if (ifa->ifa_addr->sa_family == AF_LINK) { 754 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 755 sdl->sdl_index = ifp->if_index; 756 } 757 } 758 } 759 #endif 760 761 IFNET_WLOCK(); 762 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link); 763 #ifdef VIMAGE 764 curvnet->vnet_ifcnt++; 765 #endif 766 IFNET_WUNLOCK(); 767 768 if (domain_init_status >= 2) 769 if_attachdomain1(ifp); 770 771 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 772 if (IS_DEFAULT_VNET(curvnet)) 773 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 774 775 /* Announce the interface. */ 776 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 777 } 778 779 static void 780 if_attachdomain(void *dummy) 781 { 782 struct ifnet *ifp; 783 784 TAILQ_FOREACH(ifp, &V_ifnet, if_link) 785 if_attachdomain1(ifp); 786 } 787 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND, 788 if_attachdomain, NULL); 789 790 static void 791 if_attachdomain1(struct ifnet *ifp) 792 { 793 struct domain *dp; 794 795 /* 796 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we 797 * cannot lock ifp->if_afdata initialization, entirely. 798 */ 799 if (IF_AFDATA_TRYLOCK(ifp) == 0) 800 return; 801 if (ifp->if_afdata_initialized >= domain_init_status) { 802 IF_AFDATA_UNLOCK(ifp); 803 log(LOG_WARNING, "%s called more than once on %s\n", 804 __func__, ifp->if_xname); 805 return; 806 } 807 ifp->if_afdata_initialized = domain_init_status; 808 IF_AFDATA_UNLOCK(ifp); 809 810 /* address family dependent data region */ 811 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 812 for (dp = domains; dp; dp = dp->dom_next) { 813 if (dp->dom_ifattach) 814 ifp->if_afdata[dp->dom_family] = 815 (*dp->dom_ifattach)(ifp); 816 } 817 } 818 819 /* 820 * Remove any unicast or broadcast network addresses from an interface. 821 */ 822 void 823 if_purgeaddrs(struct ifnet *ifp) 824 { 825 struct ifaddr *ifa, *next; 826 827 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) { 828 if (ifa->ifa_addr->sa_family == AF_LINK) 829 continue; 830 #ifdef INET 831 /* XXX: Ugly!! ad hoc just for INET */ 832 if (ifa->ifa_addr->sa_family == AF_INET) { 833 struct ifaliasreq ifr; 834 835 bzero(&ifr, sizeof(ifr)); 836 ifr.ifra_addr = *ifa->ifa_addr; 837 if (ifa->ifa_dstaddr) 838 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 839 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 840 NULL) == 0) 841 continue; 842 } 843 #endif /* INET */ 844 #ifdef INET6 845 if (ifa->ifa_addr->sa_family == AF_INET6) { 846 in6_purgeaddr(ifa); 847 /* ifp_addrhead is already updated */ 848 continue; 849 } 850 #endif /* INET6 */ 851 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 852 ifa_free(ifa); 853 } 854 } 855 856 /* 857 * Remove any multicast network addresses from an interface when an ifnet 858 * is going away. 859 */ 860 static void 861 if_purgemaddrs(struct ifnet *ifp) 862 { 863 struct ifmultiaddr *ifma; 864 struct ifmultiaddr *next; 865 866 IF_ADDR_WLOCK(ifp); 867 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 868 if_delmulti_locked(ifp, ifma, 1); 869 IF_ADDR_WUNLOCK(ifp); 870 } 871 872 /* 873 * Detach an interface, removing it from the list of "active" interfaces. 874 * If vmove flag is set on entry to if_detach_internal(), perform only a 875 * limited subset of cleanup tasks, given that we are moving an ifnet from 876 * one vnet to another, where it must be fully operational. 877 * 878 * XXXRW: There are some significant questions about event ordering, and 879 * how to prevent things from starting to use the interface during detach. 880 */ 881 void 882 if_detach(struct ifnet *ifp) 883 { 884 885 CURVNET_SET_QUIET(ifp->if_vnet); 886 if_detach_internal(ifp, 0); 887 CURVNET_RESTORE(); 888 } 889 890 static void 891 if_detach_internal(struct ifnet *ifp, int vmove) 892 { 893 struct ifaddr *ifa; 894 struct radix_node_head *rnh; 895 int i, j; 896 struct domain *dp; 897 struct ifnet *iter; 898 int found = 0; 899 900 IFNET_WLOCK(); 901 TAILQ_FOREACH(iter, &V_ifnet, if_link) 902 if (iter == ifp) { 903 TAILQ_REMOVE(&V_ifnet, ifp, if_link); 904 found = 1; 905 break; 906 } 907 #ifdef VIMAGE 908 if (found) 909 curvnet->vnet_ifcnt--; 910 #endif 911 IFNET_WUNLOCK(); 912 if (!found) { 913 if (vmove) 914 panic("%s: ifp=%p not on the ifnet tailq %p", 915 __func__, ifp, &V_ifnet); 916 else 917 return; /* XXX this should panic as well? */ 918 } 919 920 /* 921 * Remove/wait for pending events. 922 */ 923 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 924 925 /* 926 * Remove routes and flush queues. 927 */ 928 if_down(ifp); 929 #ifdef ALTQ 930 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 931 altq_disable(&ifp->if_snd); 932 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 933 altq_detach(&ifp->if_snd); 934 #endif 935 936 if_purgeaddrs(ifp); 937 938 #ifdef INET 939 in_ifdetach(ifp); 940 #endif 941 942 #ifdef INET6 943 /* 944 * Remove all IPv6 kernel structs related to ifp. This should be done 945 * before removing routing entries below, since IPv6 interface direct 946 * routes are expected to be removed by the IPv6-specific kernel API. 947 * Otherwise, the kernel will detect some inconsistency and bark it. 948 */ 949 in6_ifdetach(ifp); 950 #endif 951 if_purgemaddrs(ifp); 952 953 /* Announce that the interface is gone. */ 954 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 955 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 956 if (IS_DEFAULT_VNET(curvnet)) 957 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 958 959 if (!vmove) { 960 /* 961 * Prevent further calls into the device driver via ifnet. 962 */ 963 if_dead(ifp); 964 965 /* 966 * Remove link ifaddr pointer and maybe decrement if_index. 967 * Clean up all addresses. 968 */ 969 ifp->if_addr = NULL; 970 971 /* We can now free link ifaddr. */ 972 if (!TAILQ_EMPTY(&ifp->if_addrhead)) { 973 ifa = TAILQ_FIRST(&ifp->if_addrhead); 974 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 975 ifa_free(ifa); 976 } 977 } 978 979 /* 980 * Delete all remaining routes using this interface 981 * Unfortuneatly the only way to do this is to slog through 982 * the entire routing table looking for routes which point 983 * to this interface...oh well... 984 */ 985 for (i = 1; i <= AF_MAX; i++) { 986 for (j = 0; j < rt_numfibs; j++) { 987 rnh = rt_tables_get_rnh(j, i); 988 if (rnh == NULL) 989 continue; 990 RADIX_NODE_HEAD_LOCK(rnh); 991 (void) rnh->rnh_walktree(rnh, if_rtdel, ifp); 992 RADIX_NODE_HEAD_UNLOCK(rnh); 993 } 994 } 995 996 if_delgroups(ifp); 997 998 /* 999 * We cannot hold the lock over dom_ifdetach calls as they might 1000 * sleep, for example trying to drain a callout, thus open up the 1001 * theoretical race with re-attaching. 1002 */ 1003 IF_AFDATA_LOCK(ifp); 1004 i = ifp->if_afdata_initialized; 1005 ifp->if_afdata_initialized = 0; 1006 IF_AFDATA_UNLOCK(ifp); 1007 for (dp = domains; i > 0 && dp; dp = dp->dom_next) { 1008 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 1009 (*dp->dom_ifdetach)(ifp, 1010 ifp->if_afdata[dp->dom_family]); 1011 } 1012 } 1013 1014 #ifdef VIMAGE 1015 /* 1016 * if_vmove() performs a limited version of if_detach() in current 1017 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg. 1018 * An attempt is made to shrink if_index in current vnet, find an 1019 * unused if_index in target vnet and calls if_grow() if necessary, 1020 * and finally find an unused if_xname for the target vnet. 1021 */ 1022 void 1023 if_vmove(struct ifnet *ifp, struct vnet *new_vnet) 1024 { 1025 u_short idx; 1026 1027 /* 1028 * Detach from current vnet, but preserve LLADDR info, do not 1029 * mark as dead etc. so that the ifnet can be reattached later. 1030 */ 1031 if_detach_internal(ifp, 1); 1032 1033 /* 1034 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink 1035 * the if_index for that vnet if possible. 1036 * 1037 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized, 1038 * or we'd lock on one vnet and unlock on another. 1039 */ 1040 IFNET_WLOCK(); 1041 ifindex_free_locked(ifp->if_index); 1042 IFNET_WUNLOCK(); 1043 1044 /* 1045 * Perform interface-specific reassignment tasks, if provided by 1046 * the driver. 1047 */ 1048 if (ifp->if_reassign != NULL) 1049 ifp->if_reassign(ifp, new_vnet, NULL); 1050 1051 /* 1052 * Switch to the context of the target vnet. 1053 */ 1054 CURVNET_SET_QUIET(new_vnet); 1055 1056 IFNET_WLOCK(); 1057 if (ifindex_alloc_locked(&idx) != 0) { 1058 IFNET_WUNLOCK(); 1059 panic("if_index overflow"); 1060 } 1061 ifp->if_index = idx; 1062 ifnet_setbyindex_locked(ifp->if_index, ifp); 1063 IFNET_WUNLOCK(); 1064 1065 if_attach_internal(ifp, 1); 1066 1067 CURVNET_RESTORE(); 1068 } 1069 1070 /* 1071 * Move an ifnet to or from another child prison/vnet, specified by the jail id. 1072 */ 1073 static int 1074 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid) 1075 { 1076 struct prison *pr; 1077 struct ifnet *difp; 1078 1079 /* Try to find the prison within our visibility. */ 1080 sx_slock(&allprison_lock); 1081 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1082 sx_sunlock(&allprison_lock); 1083 if (pr == NULL) 1084 return (ENXIO); 1085 prison_hold_locked(pr); 1086 mtx_unlock(&pr->pr_mtx); 1087 1088 /* Do not try to move the iface from and to the same prison. */ 1089 if (pr->pr_vnet == ifp->if_vnet) { 1090 prison_free(pr); 1091 return (EEXIST); 1092 } 1093 1094 /* Make sure the named iface does not exists in the dst. prison/vnet. */ 1095 /* XXX Lock interfaces to avoid races. */ 1096 CURVNET_SET_QUIET(pr->pr_vnet); 1097 difp = ifunit(ifname); 1098 CURVNET_RESTORE(); 1099 if (difp != NULL) { 1100 prison_free(pr); 1101 return (EEXIST); 1102 } 1103 1104 /* Move the interface into the child jail/vnet. */ 1105 if_vmove(ifp, pr->pr_vnet); 1106 1107 /* Report the new if_xname back to the userland. */ 1108 sprintf(ifname, "%s", ifp->if_xname); 1109 1110 prison_free(pr); 1111 return (0); 1112 } 1113 1114 static int 1115 if_vmove_reclaim(struct thread *td, char *ifname, int jid) 1116 { 1117 struct prison *pr; 1118 struct vnet *vnet_dst; 1119 struct ifnet *ifp; 1120 1121 /* Try to find the prison within our visibility. */ 1122 sx_slock(&allprison_lock); 1123 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1124 sx_sunlock(&allprison_lock); 1125 if (pr == NULL) 1126 return (ENXIO); 1127 prison_hold_locked(pr); 1128 mtx_unlock(&pr->pr_mtx); 1129 1130 /* Make sure the named iface exists in the source prison/vnet. */ 1131 CURVNET_SET(pr->pr_vnet); 1132 ifp = ifunit(ifname); /* XXX Lock to avoid races. */ 1133 if (ifp == NULL) { 1134 CURVNET_RESTORE(); 1135 prison_free(pr); 1136 return (ENXIO); 1137 } 1138 1139 /* Do not try to move the iface from and to the same prison. */ 1140 vnet_dst = TD_TO_VNET(td); 1141 if (vnet_dst == ifp->if_vnet) { 1142 CURVNET_RESTORE(); 1143 prison_free(pr); 1144 return (EEXIST); 1145 } 1146 1147 /* Get interface back from child jail/vnet. */ 1148 if_vmove(ifp, vnet_dst); 1149 CURVNET_RESTORE(); 1150 1151 /* Report the new if_xname back to the userland. */ 1152 sprintf(ifname, "%s", ifp->if_xname); 1153 1154 prison_free(pr); 1155 return (0); 1156 } 1157 #endif /* VIMAGE */ 1158 1159 /* 1160 * Add a group to an interface 1161 */ 1162 int 1163 if_addgroup(struct ifnet *ifp, const char *groupname) 1164 { 1165 struct ifg_list *ifgl; 1166 struct ifg_group *ifg = NULL; 1167 struct ifg_member *ifgm; 1168 int new = 0; 1169 1170 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 1171 groupname[strlen(groupname) - 1] <= '9') 1172 return (EINVAL); 1173 1174 IFNET_WLOCK(); 1175 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1176 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) { 1177 IFNET_WUNLOCK(); 1178 return (EEXIST); 1179 } 1180 1181 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP, 1182 M_NOWAIT)) == NULL) { 1183 IFNET_WUNLOCK(); 1184 return (ENOMEM); 1185 } 1186 1187 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member), 1188 M_TEMP, M_NOWAIT)) == NULL) { 1189 free(ifgl, M_TEMP); 1190 IFNET_WUNLOCK(); 1191 return (ENOMEM); 1192 } 1193 1194 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1195 if (!strcmp(ifg->ifg_group, groupname)) 1196 break; 1197 1198 if (ifg == NULL) { 1199 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group), 1200 M_TEMP, M_NOWAIT)) == NULL) { 1201 free(ifgl, M_TEMP); 1202 free(ifgm, M_TEMP); 1203 IFNET_WUNLOCK(); 1204 return (ENOMEM); 1205 } 1206 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 1207 ifg->ifg_refcnt = 0; 1208 TAILQ_INIT(&ifg->ifg_members); 1209 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next); 1210 new = 1; 1211 } 1212 1213 ifg->ifg_refcnt++; 1214 ifgl->ifgl_group = ifg; 1215 ifgm->ifgm_ifp = ifp; 1216 1217 IF_ADDR_WLOCK(ifp); 1218 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 1219 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 1220 IF_ADDR_WUNLOCK(ifp); 1221 1222 IFNET_WUNLOCK(); 1223 1224 if (new) 1225 EVENTHANDLER_INVOKE(group_attach_event, ifg); 1226 EVENTHANDLER_INVOKE(group_change_event, groupname); 1227 1228 return (0); 1229 } 1230 1231 /* 1232 * Remove a group from an interface 1233 */ 1234 int 1235 if_delgroup(struct ifnet *ifp, const char *groupname) 1236 { 1237 struct ifg_list *ifgl; 1238 struct ifg_member *ifgm; 1239 1240 IFNET_WLOCK(); 1241 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1242 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1243 break; 1244 if (ifgl == NULL) { 1245 IFNET_WUNLOCK(); 1246 return (ENOENT); 1247 } 1248 1249 IF_ADDR_WLOCK(ifp); 1250 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1251 IF_ADDR_WUNLOCK(ifp); 1252 1253 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1254 if (ifgm->ifgm_ifp == ifp) 1255 break; 1256 1257 if (ifgm != NULL) { 1258 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 1259 free(ifgm, M_TEMP); 1260 } 1261 1262 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1263 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1264 IFNET_WUNLOCK(); 1265 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group); 1266 free(ifgl->ifgl_group, M_TEMP); 1267 } else 1268 IFNET_WUNLOCK(); 1269 1270 free(ifgl, M_TEMP); 1271 1272 EVENTHANDLER_INVOKE(group_change_event, groupname); 1273 1274 return (0); 1275 } 1276 1277 /* 1278 * Remove an interface from all groups 1279 */ 1280 static void 1281 if_delgroups(struct ifnet *ifp) 1282 { 1283 struct ifg_list *ifgl; 1284 struct ifg_member *ifgm; 1285 char groupname[IFNAMSIZ]; 1286 1287 IFNET_WLOCK(); 1288 while (!TAILQ_EMPTY(&ifp->if_groups)) { 1289 ifgl = TAILQ_FIRST(&ifp->if_groups); 1290 1291 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ); 1292 1293 IF_ADDR_WLOCK(ifp); 1294 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1295 IF_ADDR_WUNLOCK(ifp); 1296 1297 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1298 if (ifgm->ifgm_ifp == ifp) 1299 break; 1300 1301 if (ifgm != NULL) { 1302 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, 1303 ifgm_next); 1304 free(ifgm, M_TEMP); 1305 } 1306 1307 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1308 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1309 IFNET_WUNLOCK(); 1310 EVENTHANDLER_INVOKE(group_detach_event, 1311 ifgl->ifgl_group); 1312 free(ifgl->ifgl_group, M_TEMP); 1313 } else 1314 IFNET_WUNLOCK(); 1315 1316 free(ifgl, M_TEMP); 1317 1318 EVENTHANDLER_INVOKE(group_change_event, groupname); 1319 1320 IFNET_WLOCK(); 1321 } 1322 IFNET_WUNLOCK(); 1323 } 1324 1325 /* 1326 * Stores all groups from an interface in memory pointed 1327 * to by data 1328 */ 1329 static int 1330 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp) 1331 { 1332 int len, error; 1333 struct ifg_list *ifgl; 1334 struct ifg_req ifgrq, *ifgp; 1335 struct ifgroupreq *ifgr = data; 1336 1337 if (ifgr->ifgr_len == 0) { 1338 IF_ADDR_RLOCK(ifp); 1339 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1340 ifgr->ifgr_len += sizeof(struct ifg_req); 1341 IF_ADDR_RUNLOCK(ifp); 1342 return (0); 1343 } 1344 1345 len = ifgr->ifgr_len; 1346 ifgp = ifgr->ifgr_groups; 1347 /* XXX: wire */ 1348 IF_ADDR_RLOCK(ifp); 1349 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 1350 if (len < sizeof(ifgrq)) { 1351 IF_ADDR_RUNLOCK(ifp); 1352 return (EINVAL); 1353 } 1354 bzero(&ifgrq, sizeof ifgrq); 1355 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 1356 sizeof(ifgrq.ifgrq_group)); 1357 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1358 IF_ADDR_RUNLOCK(ifp); 1359 return (error); 1360 } 1361 len -= sizeof(ifgrq); 1362 ifgp++; 1363 } 1364 IF_ADDR_RUNLOCK(ifp); 1365 1366 return (0); 1367 } 1368 1369 /* 1370 * Stores all members of a group in memory pointed to by data 1371 */ 1372 static int 1373 if_getgroupmembers(struct ifgroupreq *data) 1374 { 1375 struct ifgroupreq *ifgr = data; 1376 struct ifg_group *ifg; 1377 struct ifg_member *ifgm; 1378 struct ifg_req ifgrq, *ifgp; 1379 int len, error; 1380 1381 IFNET_RLOCK(); 1382 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1383 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 1384 break; 1385 if (ifg == NULL) { 1386 IFNET_RUNLOCK(); 1387 return (ENOENT); 1388 } 1389 1390 if (ifgr->ifgr_len == 0) { 1391 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1392 ifgr->ifgr_len += sizeof(ifgrq); 1393 IFNET_RUNLOCK(); 1394 return (0); 1395 } 1396 1397 len = ifgr->ifgr_len; 1398 ifgp = ifgr->ifgr_groups; 1399 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1400 if (len < sizeof(ifgrq)) { 1401 IFNET_RUNLOCK(); 1402 return (EINVAL); 1403 } 1404 bzero(&ifgrq, sizeof ifgrq); 1405 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1406 sizeof(ifgrq.ifgrq_member)); 1407 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1408 IFNET_RUNLOCK(); 1409 return (error); 1410 } 1411 len -= sizeof(ifgrq); 1412 ifgp++; 1413 } 1414 IFNET_RUNLOCK(); 1415 1416 return (0); 1417 } 1418 1419 /* 1420 * Delete Routes for a Network Interface 1421 * 1422 * Called for each routing entry via the rnh->rnh_walktree() call above 1423 * to delete all route entries referencing a detaching network interface. 1424 * 1425 * Arguments: 1426 * rn pointer to node in the routing table 1427 * arg argument passed to rnh->rnh_walktree() - detaching interface 1428 * 1429 * Returns: 1430 * 0 successful 1431 * errno failed - reason indicated 1432 * 1433 */ 1434 static int 1435 if_rtdel(struct radix_node *rn, void *arg) 1436 { 1437 struct rtentry *rt = (struct rtentry *)rn; 1438 struct ifnet *ifp = arg; 1439 int err; 1440 1441 if (rt->rt_ifp == ifp) { 1442 1443 /* 1444 * Protect (sorta) against walktree recursion problems 1445 * with cloned routes 1446 */ 1447 if ((rt->rt_flags & RTF_UP) == 0) 1448 return (0); 1449 1450 err = rtrequest_fib(RTM_DELETE, rt_key(rt), rt->rt_gateway, 1451 rt_mask(rt), 1452 rt->rt_flags|RTF_RNH_LOCKED|RTF_PINNED, 1453 (struct rtentry **) NULL, rt->rt_fibnum); 1454 if (err) { 1455 log(LOG_WARNING, "if_rtdel: error %d\n", err); 1456 } 1457 } 1458 1459 return (0); 1460 } 1461 1462 /* 1463 * Return counter values from old racy non-pcpu counters. 1464 */ 1465 uint64_t 1466 if_get_counter_default(struct ifnet *ifp, ift_counter cnt) 1467 { 1468 1469 switch (cnt) { 1470 case IFCOUNTER_IPACKETS: 1471 return (ifp->if_ipackets); 1472 case IFCOUNTER_IERRORS: 1473 return (ifp->if_ierrors); 1474 case IFCOUNTER_OPACKETS: 1475 return (ifp->if_opackets); 1476 case IFCOUNTER_OERRORS: 1477 return (ifp->if_oerrors); 1478 case IFCOUNTER_COLLISIONS: 1479 return (ifp->if_collisions); 1480 case IFCOUNTER_IBYTES: 1481 return (ifp->if_ibytes); 1482 case IFCOUNTER_OBYTES: 1483 return (ifp->if_obytes); 1484 case IFCOUNTER_IMCASTS: 1485 return (ifp->if_imcasts); 1486 case IFCOUNTER_OMCASTS: 1487 return (ifp->if_omcasts); 1488 case IFCOUNTER_IQDROPS: 1489 return (ifp->if_iqdrops); 1490 case IFCOUNTER_OQDROPS: 1491 return (ifp->if_oqdrops); 1492 case IFCOUNTER_NOPROTO: 1493 return (ifp->if_noproto); 1494 } 1495 panic("%s: unknown counter %d", __func__, cnt); 1496 } 1497 1498 /* 1499 * Increase an ifnet counter. Usually used for counters shared 1500 * between the stack and a driver, but function supports them all. 1501 */ 1502 void 1503 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc) 1504 { 1505 1506 switch (cnt) { 1507 case IFCOUNTER_IPACKETS: 1508 ifp->if_ipackets += inc; 1509 break; 1510 case IFCOUNTER_IERRORS: 1511 ifp->if_ierrors += inc; 1512 break; 1513 case IFCOUNTER_OPACKETS: 1514 ifp->if_opackets += inc; 1515 break; 1516 case IFCOUNTER_OERRORS: 1517 ifp->if_oerrors += inc; 1518 break; 1519 case IFCOUNTER_COLLISIONS: 1520 ifp->if_collisions += inc; 1521 break; 1522 case IFCOUNTER_IBYTES: 1523 ifp->if_ibytes += inc; 1524 break; 1525 case IFCOUNTER_OBYTES: 1526 ifp->if_obytes += inc; 1527 break; 1528 case IFCOUNTER_IMCASTS: 1529 ifp->if_imcasts += inc; 1530 break; 1531 case IFCOUNTER_OMCASTS: 1532 ifp->if_omcasts += inc; 1533 break; 1534 case IFCOUNTER_IQDROPS: 1535 ifp->if_iqdrops += inc; 1536 break; 1537 case IFCOUNTER_OQDROPS: 1538 ifp->if_oqdrops += inc; 1539 break; 1540 case IFCOUNTER_NOPROTO: 1541 ifp->if_noproto += inc; 1542 break; 1543 default: 1544 panic("%s: unknown counter %d", __func__, cnt); 1545 } 1546 } 1547 1548 /* 1549 * Copy data from ifnet to userland API structure if_data. 1550 */ 1551 void 1552 if_data_copy(struct ifnet *ifp, struct if_data *ifd) 1553 { 1554 1555 ifd->ifi_type = ifp->if_type; 1556 ifd->ifi_physical = 0; 1557 ifd->ifi_addrlen = ifp->if_addrlen; 1558 ifd->ifi_hdrlen = ifp->if_hdrlen; 1559 ifd->ifi_link_state = ifp->if_link_state; 1560 ifd->ifi_vhid = 0; 1561 ifd->ifi_datalen = sizeof(struct if_data); 1562 ifd->ifi_mtu = ifp->if_mtu; 1563 ifd->ifi_metric = ifp->if_metric; 1564 ifd->ifi_baudrate = ifp->if_baudrate; 1565 ifd->ifi_hwassist = ifp->if_hwassist; 1566 ifd->ifi_epoch = ifp->if_epoch; 1567 ifd->ifi_lastchange = ifp->if_lastchange; 1568 1569 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS); 1570 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS); 1571 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS); 1572 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS); 1573 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS); 1574 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES); 1575 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES); 1576 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS); 1577 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS); 1578 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS); 1579 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS); 1580 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO); 1581 } 1582 1583 /* 1584 * Wrapper functions for struct ifnet address list locking macros. These are 1585 * used by kernel modules to avoid encoding programming interface or binary 1586 * interface assumptions that may be violated when kernel-internal locking 1587 * approaches change. 1588 */ 1589 void 1590 if_addr_rlock(struct ifnet *ifp) 1591 { 1592 1593 IF_ADDR_RLOCK(ifp); 1594 } 1595 1596 void 1597 if_addr_runlock(struct ifnet *ifp) 1598 { 1599 1600 IF_ADDR_RUNLOCK(ifp); 1601 } 1602 1603 void 1604 if_maddr_rlock(if_t ifp) 1605 { 1606 1607 IF_ADDR_RLOCK((struct ifnet *)ifp); 1608 } 1609 1610 void 1611 if_maddr_runlock(if_t ifp) 1612 { 1613 1614 IF_ADDR_RUNLOCK((struct ifnet *)ifp); 1615 } 1616 1617 /* 1618 * Initialization, destruction and refcounting functions for ifaddrs. 1619 */ 1620 struct ifaddr * 1621 ifa_alloc(size_t size, int flags) 1622 { 1623 struct ifaddr *ifa; 1624 1625 KASSERT(size >= sizeof(struct ifaddr), 1626 ("%s: invalid size %zu", __func__, size)); 1627 1628 ifa = malloc(size, M_IFADDR, M_ZERO | flags); 1629 if (ifa == NULL) 1630 return (NULL); 1631 1632 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL) 1633 goto fail; 1634 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL) 1635 goto fail; 1636 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL) 1637 goto fail; 1638 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL) 1639 goto fail; 1640 1641 refcount_init(&ifa->ifa_refcnt, 1); 1642 1643 return (ifa); 1644 1645 fail: 1646 /* free(NULL) is okay */ 1647 counter_u64_free(ifa->ifa_opackets); 1648 counter_u64_free(ifa->ifa_ipackets); 1649 counter_u64_free(ifa->ifa_obytes); 1650 counter_u64_free(ifa->ifa_ibytes); 1651 free(ifa, M_IFADDR); 1652 1653 return (NULL); 1654 } 1655 1656 void 1657 ifa_ref(struct ifaddr *ifa) 1658 { 1659 1660 refcount_acquire(&ifa->ifa_refcnt); 1661 } 1662 1663 void 1664 ifa_free(struct ifaddr *ifa) 1665 { 1666 1667 if (refcount_release(&ifa->ifa_refcnt)) { 1668 counter_u64_free(ifa->ifa_opackets); 1669 counter_u64_free(ifa->ifa_ipackets); 1670 counter_u64_free(ifa->ifa_obytes); 1671 counter_u64_free(ifa->ifa_ibytes); 1672 free(ifa, M_IFADDR); 1673 } 1674 } 1675 1676 int 1677 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1678 { 1679 int error = 0; 1680 struct rtentry *rt = NULL; 1681 struct rt_addrinfo info; 1682 static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK}; 1683 1684 bzero(&info, sizeof(info)); 1685 info.rti_ifp = V_loif; 1686 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; 1687 info.rti_info[RTAX_DST] = ia; 1688 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1689 error = rtrequest1_fib(RTM_ADD, &info, &rt, ifa->ifa_ifp->if_fib); 1690 1691 if (error == 0 && rt != NULL) { 1692 RT_LOCK(rt); 1693 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type = 1694 ifa->ifa_ifp->if_type; 1695 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index = 1696 ifa->ifa_ifp->if_index; 1697 RT_REMREF(rt); 1698 RT_UNLOCK(rt); 1699 } else if (error != 0) 1700 log(LOG_DEBUG, "%s: insertion failed: %u\n", __func__, error); 1701 1702 return (error); 1703 } 1704 1705 int 1706 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1707 { 1708 int error = 0; 1709 struct rt_addrinfo info; 1710 struct sockaddr_dl null_sdl; 1711 1712 bzero(&null_sdl, sizeof(null_sdl)); 1713 null_sdl.sdl_len = sizeof(null_sdl); 1714 null_sdl.sdl_family = AF_LINK; 1715 null_sdl.sdl_type = ifa->ifa_ifp->if_type; 1716 null_sdl.sdl_index = ifa->ifa_ifp->if_index; 1717 bzero(&info, sizeof(info)); 1718 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; 1719 info.rti_info[RTAX_DST] = ia; 1720 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1721 error = rtrequest1_fib(RTM_DELETE, &info, NULL, ifa->ifa_ifp->if_fib); 1722 1723 if (error != 0) 1724 log(LOG_DEBUG, "%s: deletion failed: %u\n", __func__, error); 1725 1726 return (error); 1727 } 1728 1729 int 1730 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *sa, int fib) 1731 { 1732 struct rtentry *rt; 1733 1734 rt = rtalloc1_fib(sa, 0, 0, fib); 1735 if (rt == NULL) { 1736 log(LOG_DEBUG, "%s: fail", __func__); 1737 return (EHOSTUNREACH); 1738 } 1739 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type = 1740 ifa->ifa_ifp->if_type; 1741 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index = 1742 ifa->ifa_ifp->if_index; 1743 RTFREE_LOCKED(rt); 1744 1745 return (0); 1746 } 1747 1748 /* 1749 * XXX: Because sockaddr_dl has deeper structure than the sockaddr 1750 * structs used to represent other address families, it is necessary 1751 * to perform a different comparison. 1752 */ 1753 1754 #define sa_dl_equal(a1, a2) \ 1755 ((((struct sockaddr_dl *)(a1))->sdl_len == \ 1756 ((struct sockaddr_dl *)(a2))->sdl_len) && \ 1757 (bcmp(LLADDR((struct sockaddr_dl *)(a1)), \ 1758 LLADDR((struct sockaddr_dl *)(a2)), \ 1759 ((struct sockaddr_dl *)(a1))->sdl_alen) == 0)) 1760 1761 /* 1762 * Locate an interface based on a complete address. 1763 */ 1764 /*ARGSUSED*/ 1765 static struct ifaddr * 1766 ifa_ifwithaddr_internal(struct sockaddr *addr, int getref) 1767 { 1768 struct ifnet *ifp; 1769 struct ifaddr *ifa; 1770 1771 IFNET_RLOCK_NOSLEEP(); 1772 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1773 IF_ADDR_RLOCK(ifp); 1774 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1775 if (ifa->ifa_addr->sa_family != addr->sa_family) 1776 continue; 1777 if (sa_equal(addr, ifa->ifa_addr)) { 1778 if (getref) 1779 ifa_ref(ifa); 1780 IF_ADDR_RUNLOCK(ifp); 1781 goto done; 1782 } 1783 /* IP6 doesn't have broadcast */ 1784 if ((ifp->if_flags & IFF_BROADCAST) && 1785 ifa->ifa_broadaddr && 1786 ifa->ifa_broadaddr->sa_len != 0 && 1787 sa_equal(ifa->ifa_broadaddr, addr)) { 1788 if (getref) 1789 ifa_ref(ifa); 1790 IF_ADDR_RUNLOCK(ifp); 1791 goto done; 1792 } 1793 } 1794 IF_ADDR_RUNLOCK(ifp); 1795 } 1796 ifa = NULL; 1797 done: 1798 IFNET_RUNLOCK_NOSLEEP(); 1799 return (ifa); 1800 } 1801 1802 struct ifaddr * 1803 ifa_ifwithaddr(struct sockaddr *addr) 1804 { 1805 1806 return (ifa_ifwithaddr_internal(addr, 1)); 1807 } 1808 1809 int 1810 ifa_ifwithaddr_check(struct sockaddr *addr) 1811 { 1812 1813 return (ifa_ifwithaddr_internal(addr, 0) != NULL); 1814 } 1815 1816 /* 1817 * Locate an interface based on the broadcast address. 1818 */ 1819 /* ARGSUSED */ 1820 struct ifaddr * 1821 ifa_ifwithbroadaddr(struct sockaddr *addr, int fibnum) 1822 { 1823 struct ifnet *ifp; 1824 struct ifaddr *ifa; 1825 1826 IFNET_RLOCK_NOSLEEP(); 1827 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1828 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1829 continue; 1830 IF_ADDR_RLOCK(ifp); 1831 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1832 if (ifa->ifa_addr->sa_family != addr->sa_family) 1833 continue; 1834 if ((ifp->if_flags & IFF_BROADCAST) && 1835 ifa->ifa_broadaddr && 1836 ifa->ifa_broadaddr->sa_len != 0 && 1837 sa_equal(ifa->ifa_broadaddr, addr)) { 1838 ifa_ref(ifa); 1839 IF_ADDR_RUNLOCK(ifp); 1840 goto done; 1841 } 1842 } 1843 IF_ADDR_RUNLOCK(ifp); 1844 } 1845 ifa = NULL; 1846 done: 1847 IFNET_RUNLOCK_NOSLEEP(); 1848 return (ifa); 1849 } 1850 1851 /* 1852 * Locate the point to point interface with a given destination address. 1853 */ 1854 /*ARGSUSED*/ 1855 struct ifaddr * 1856 ifa_ifwithdstaddr(struct sockaddr *addr, int fibnum) 1857 { 1858 struct ifnet *ifp; 1859 struct ifaddr *ifa; 1860 1861 IFNET_RLOCK_NOSLEEP(); 1862 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1863 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1864 continue; 1865 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1866 continue; 1867 IF_ADDR_RLOCK(ifp); 1868 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1869 if (ifa->ifa_addr->sa_family != addr->sa_family) 1870 continue; 1871 if (ifa->ifa_dstaddr != NULL && 1872 sa_equal(addr, ifa->ifa_dstaddr)) { 1873 ifa_ref(ifa); 1874 IF_ADDR_RUNLOCK(ifp); 1875 goto done; 1876 } 1877 } 1878 IF_ADDR_RUNLOCK(ifp); 1879 } 1880 ifa = NULL; 1881 done: 1882 IFNET_RUNLOCK_NOSLEEP(); 1883 return (ifa); 1884 } 1885 1886 /* 1887 * Find an interface on a specific network. If many, choice 1888 * is most specific found. 1889 */ 1890 struct ifaddr * 1891 ifa_ifwithnet(struct sockaddr *addr, int ignore_ptp, int fibnum) 1892 { 1893 struct ifnet *ifp; 1894 struct ifaddr *ifa; 1895 struct ifaddr *ifa_maybe = NULL; 1896 u_int af = addr->sa_family; 1897 char *addr_data = addr->sa_data, *cplim; 1898 1899 /* 1900 * AF_LINK addresses can be looked up directly by their index number, 1901 * so do that if we can. 1902 */ 1903 if (af == AF_LINK) { 1904 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; 1905 if (sdl->sdl_index && sdl->sdl_index <= V_if_index) 1906 return (ifaddr_byindex(sdl->sdl_index)); 1907 } 1908 1909 /* 1910 * Scan though each interface, looking for ones that have addresses 1911 * in this address family and the requested fib. Maintain a reference 1912 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that 1913 * kept it stable when we move onto the next interface. 1914 */ 1915 IFNET_RLOCK_NOSLEEP(); 1916 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1917 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1918 continue; 1919 IF_ADDR_RLOCK(ifp); 1920 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1921 char *cp, *cp2, *cp3; 1922 1923 if (ifa->ifa_addr->sa_family != af) 1924 next: continue; 1925 if (af == AF_INET && 1926 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) { 1927 /* 1928 * This is a bit broken as it doesn't 1929 * take into account that the remote end may 1930 * be a single node in the network we are 1931 * looking for. 1932 * The trouble is that we don't know the 1933 * netmask for the remote end. 1934 */ 1935 if (ifa->ifa_dstaddr != NULL && 1936 sa_equal(addr, ifa->ifa_dstaddr)) { 1937 ifa_ref(ifa); 1938 IF_ADDR_RUNLOCK(ifp); 1939 goto done; 1940 } 1941 } else { 1942 /* 1943 * Scan all the bits in the ifa's address. 1944 * If a bit dissagrees with what we are 1945 * looking for, mask it with the netmask 1946 * to see if it really matters. 1947 * (A byte at a time) 1948 */ 1949 if (ifa->ifa_netmask == 0) 1950 continue; 1951 cp = addr_data; 1952 cp2 = ifa->ifa_addr->sa_data; 1953 cp3 = ifa->ifa_netmask->sa_data; 1954 cplim = ifa->ifa_netmask->sa_len 1955 + (char *)ifa->ifa_netmask; 1956 while (cp3 < cplim) 1957 if ((*cp++ ^ *cp2++) & *cp3++) 1958 goto next; /* next address! */ 1959 /* 1960 * If the netmask of what we just found 1961 * is more specific than what we had before 1962 * (if we had one), or if the virtual status 1963 * of new prefix is better than of the old one, 1964 * then remember the new one before continuing 1965 * to search for an even better one. 1966 */ 1967 if (ifa_maybe == NULL || 1968 ifa_preferred(ifa_maybe, ifa) || 1969 rn_refines((caddr_t)ifa->ifa_netmask, 1970 (caddr_t)ifa_maybe->ifa_netmask)) { 1971 if (ifa_maybe != NULL) 1972 ifa_free(ifa_maybe); 1973 ifa_maybe = ifa; 1974 ifa_ref(ifa_maybe); 1975 } 1976 } 1977 } 1978 IF_ADDR_RUNLOCK(ifp); 1979 } 1980 ifa = ifa_maybe; 1981 ifa_maybe = NULL; 1982 done: 1983 IFNET_RUNLOCK_NOSLEEP(); 1984 if (ifa_maybe != NULL) 1985 ifa_free(ifa_maybe); 1986 return (ifa); 1987 } 1988 1989 /* 1990 * Find an interface address specific to an interface best matching 1991 * a given address. 1992 */ 1993 struct ifaddr * 1994 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp) 1995 { 1996 struct ifaddr *ifa; 1997 char *cp, *cp2, *cp3; 1998 char *cplim; 1999 struct ifaddr *ifa_maybe = NULL; 2000 u_int af = addr->sa_family; 2001 2002 if (af >= AF_MAX) 2003 return (NULL); 2004 IF_ADDR_RLOCK(ifp); 2005 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2006 if (ifa->ifa_addr->sa_family != af) 2007 continue; 2008 if (ifa_maybe == NULL) 2009 ifa_maybe = ifa; 2010 if (ifa->ifa_netmask == 0) { 2011 if (sa_equal(addr, ifa->ifa_addr) || 2012 (ifa->ifa_dstaddr && 2013 sa_equal(addr, ifa->ifa_dstaddr))) 2014 goto done; 2015 continue; 2016 } 2017 if (ifp->if_flags & IFF_POINTOPOINT) { 2018 if (sa_equal(addr, ifa->ifa_dstaddr)) 2019 goto done; 2020 } else { 2021 cp = addr->sa_data; 2022 cp2 = ifa->ifa_addr->sa_data; 2023 cp3 = ifa->ifa_netmask->sa_data; 2024 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 2025 for (; cp3 < cplim; cp3++) 2026 if ((*cp++ ^ *cp2++) & *cp3) 2027 break; 2028 if (cp3 == cplim) 2029 goto done; 2030 } 2031 } 2032 ifa = ifa_maybe; 2033 done: 2034 if (ifa != NULL) 2035 ifa_ref(ifa); 2036 IF_ADDR_RUNLOCK(ifp); 2037 return (ifa); 2038 } 2039 2040 /* 2041 * See whether new ifa is better than current one: 2042 * 1) A non-virtual one is preferred over virtual. 2043 * 2) A virtual in master state preferred over any other state. 2044 * 2045 * Used in several address selecting functions. 2046 */ 2047 int 2048 ifa_preferred(struct ifaddr *cur, struct ifaddr *next) 2049 { 2050 2051 return (cur->ifa_carp && (!next->ifa_carp || 2052 ((*carp_master_p)(next) && !(*carp_master_p)(cur)))); 2053 } 2054 2055 #include <net/if_llatbl.h> 2056 2057 /* 2058 * Default action when installing a route with a Link Level gateway. 2059 * Lookup an appropriate real ifa to point to. 2060 * This should be moved to /sys/net/link.c eventually. 2061 */ 2062 static void 2063 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 2064 { 2065 struct ifaddr *ifa, *oifa; 2066 struct sockaddr *dst; 2067 struct ifnet *ifp; 2068 2069 RT_LOCK_ASSERT(rt); 2070 2071 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) || 2072 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0)) 2073 return; 2074 ifa = ifaof_ifpforaddr(dst, ifp); 2075 if (ifa) { 2076 oifa = rt->rt_ifa; 2077 rt->rt_ifa = ifa; 2078 ifa_free(oifa); 2079 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 2080 ifa->ifa_rtrequest(cmd, rt, info); 2081 } 2082 } 2083 2084 struct sockaddr_dl * 2085 link_alloc_sdl(size_t size, int flags) 2086 { 2087 2088 return (malloc(size, M_TEMP, flags)); 2089 } 2090 2091 void 2092 link_free_sdl(struct sockaddr *sa) 2093 { 2094 free(sa, M_TEMP); 2095 } 2096 2097 /* 2098 * Fills in given sdl with interface basic info. 2099 * Returns pointer to filled sdl. 2100 */ 2101 struct sockaddr_dl * 2102 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype) 2103 { 2104 struct sockaddr_dl *sdl; 2105 2106 sdl = (struct sockaddr_dl *)paddr; 2107 memset(sdl, 0, sizeof(struct sockaddr_dl)); 2108 sdl->sdl_len = sizeof(struct sockaddr_dl); 2109 sdl->sdl_family = AF_LINK; 2110 sdl->sdl_index = ifp->if_index; 2111 sdl->sdl_type = iftype; 2112 2113 return (sdl); 2114 } 2115 2116 /* 2117 * Mark an interface down and notify protocols of 2118 * the transition. 2119 */ 2120 static void 2121 if_unroute(struct ifnet *ifp, int flag, int fam) 2122 { 2123 struct ifaddr *ifa; 2124 2125 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP")); 2126 2127 ifp->if_flags &= ~flag; 2128 getmicrotime(&ifp->if_lastchange); 2129 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2130 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2131 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 2132 ifp->if_qflush(ifp); 2133 2134 if (ifp->if_carp) 2135 (*carp_linkstate_p)(ifp); 2136 rt_ifmsg(ifp); 2137 } 2138 2139 /* 2140 * Mark an interface up and notify protocols of 2141 * the transition. 2142 */ 2143 static void 2144 if_route(struct ifnet *ifp, int flag, int fam) 2145 { 2146 struct ifaddr *ifa; 2147 2148 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP")); 2149 2150 ifp->if_flags |= flag; 2151 getmicrotime(&ifp->if_lastchange); 2152 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2153 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2154 pfctlinput(PRC_IFUP, ifa->ifa_addr); 2155 if (ifp->if_carp) 2156 (*carp_linkstate_p)(ifp); 2157 rt_ifmsg(ifp); 2158 #ifdef INET6 2159 in6_if_up(ifp); 2160 #endif 2161 } 2162 2163 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */ 2164 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */ 2165 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *); 2166 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t); 2167 int (*vlan_tag_p)(struct ifnet *, uint16_t *); 2168 int (*vlan_setcookie_p)(struct ifnet *, void *); 2169 void *(*vlan_cookie_p)(struct ifnet *); 2170 2171 /* 2172 * Handle a change in the interface link state. To avoid LORs 2173 * between driver lock and upper layer locks, as well as possible 2174 * recursions, we post event to taskqueue, and all job 2175 * is done in static do_link_state_change(). 2176 */ 2177 void 2178 if_link_state_change(struct ifnet *ifp, int link_state) 2179 { 2180 /* Return if state hasn't changed. */ 2181 if (ifp->if_link_state == link_state) 2182 return; 2183 2184 ifp->if_link_state = link_state; 2185 2186 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask); 2187 } 2188 2189 static void 2190 do_link_state_change(void *arg, int pending) 2191 { 2192 struct ifnet *ifp = (struct ifnet *)arg; 2193 int link_state = ifp->if_link_state; 2194 CURVNET_SET(ifp->if_vnet); 2195 2196 /* Notify that the link state has changed. */ 2197 rt_ifmsg(ifp); 2198 if (ifp->if_vlantrunk != NULL) 2199 (*vlan_link_state_p)(ifp); 2200 2201 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) && 2202 IFP2AC(ifp)->ac_netgraph != NULL) 2203 (*ng_ether_link_state_p)(ifp, link_state); 2204 if (ifp->if_carp) 2205 (*carp_linkstate_p)(ifp); 2206 if (ifp->if_bridge) 2207 (*bridge_linkstate_p)(ifp); 2208 if (ifp->if_lagg) 2209 (*lagg_linkstate_p)(ifp, link_state); 2210 2211 if (IS_DEFAULT_VNET(curvnet)) 2212 devctl_notify("IFNET", ifp->if_xname, 2213 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", 2214 NULL); 2215 if (pending > 1) 2216 if_printf(ifp, "%d link states coalesced\n", pending); 2217 if (log_link_state_change) 2218 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname, 2219 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" ); 2220 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, ifp->if_link_state); 2221 CURVNET_RESTORE(); 2222 } 2223 2224 /* 2225 * Mark an interface down and notify protocols of 2226 * the transition. 2227 */ 2228 void 2229 if_down(struct ifnet *ifp) 2230 { 2231 2232 if_unroute(ifp, IFF_UP, AF_UNSPEC); 2233 } 2234 2235 /* 2236 * Mark an interface up and notify protocols of 2237 * the transition. 2238 */ 2239 void 2240 if_up(struct ifnet *ifp) 2241 { 2242 2243 if_route(ifp, IFF_UP, AF_UNSPEC); 2244 } 2245 2246 /* 2247 * Flush an interface queue. 2248 */ 2249 void 2250 if_qflush(struct ifnet *ifp) 2251 { 2252 struct mbuf *m, *n; 2253 struct ifaltq *ifq; 2254 2255 ifq = &ifp->if_snd; 2256 IFQ_LOCK(ifq); 2257 #ifdef ALTQ 2258 if (ALTQ_IS_ENABLED(ifq)) 2259 ALTQ_PURGE(ifq); 2260 #endif 2261 n = ifq->ifq_head; 2262 while ((m = n) != 0) { 2263 n = m->m_nextpkt; 2264 m_freem(m); 2265 } 2266 ifq->ifq_head = 0; 2267 ifq->ifq_tail = 0; 2268 ifq->ifq_len = 0; 2269 IFQ_UNLOCK(ifq); 2270 } 2271 2272 /* 2273 * Map interface name to interface structure pointer, with or without 2274 * returning a reference. 2275 */ 2276 struct ifnet * 2277 ifunit_ref(const char *name) 2278 { 2279 struct ifnet *ifp; 2280 2281 IFNET_RLOCK_NOSLEEP(); 2282 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2283 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 && 2284 !(ifp->if_flags & IFF_DYING)) 2285 break; 2286 } 2287 if (ifp != NULL) 2288 if_ref(ifp); 2289 IFNET_RUNLOCK_NOSLEEP(); 2290 return (ifp); 2291 } 2292 2293 struct ifnet * 2294 ifunit(const char *name) 2295 { 2296 struct ifnet *ifp; 2297 2298 IFNET_RLOCK_NOSLEEP(); 2299 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2300 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0) 2301 break; 2302 } 2303 IFNET_RUNLOCK_NOSLEEP(); 2304 return (ifp); 2305 } 2306 2307 /* 2308 * Hardware specific interface ioctls. 2309 */ 2310 static int 2311 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td) 2312 { 2313 struct ifreq *ifr; 2314 int error = 0; 2315 int new_flags, temp_flags; 2316 size_t namelen, onamelen; 2317 size_t descrlen; 2318 char *descrbuf, *odescrbuf; 2319 char new_name[IFNAMSIZ]; 2320 struct ifaddr *ifa; 2321 struct sockaddr_dl *sdl; 2322 2323 ifr = (struct ifreq *)data; 2324 switch (cmd) { 2325 case SIOCGIFINDEX: 2326 ifr->ifr_index = ifp->if_index; 2327 break; 2328 2329 case SIOCGIFFLAGS: 2330 temp_flags = ifp->if_flags | ifp->if_drv_flags; 2331 ifr->ifr_flags = temp_flags & 0xffff; 2332 ifr->ifr_flagshigh = temp_flags >> 16; 2333 break; 2334 2335 case SIOCGIFCAP: 2336 ifr->ifr_reqcap = ifp->if_capabilities; 2337 ifr->ifr_curcap = ifp->if_capenable; 2338 break; 2339 2340 #ifdef MAC 2341 case SIOCGIFMAC: 2342 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp); 2343 break; 2344 #endif 2345 2346 case SIOCGIFMETRIC: 2347 ifr->ifr_metric = ifp->if_metric; 2348 break; 2349 2350 case SIOCGIFMTU: 2351 ifr->ifr_mtu = ifp->if_mtu; 2352 break; 2353 2354 case SIOCGIFPHYS: 2355 /* XXXGL: did this ever worked? */ 2356 ifr->ifr_phys = 0; 2357 break; 2358 2359 case SIOCGIFDESCR: 2360 error = 0; 2361 sx_slock(&ifdescr_sx); 2362 if (ifp->if_description == NULL) 2363 error = ENOMSG; 2364 else { 2365 /* space for terminating nul */ 2366 descrlen = strlen(ifp->if_description) + 1; 2367 if (ifr->ifr_buffer.length < descrlen) 2368 ifr->ifr_buffer.buffer = NULL; 2369 else 2370 error = copyout(ifp->if_description, 2371 ifr->ifr_buffer.buffer, descrlen); 2372 ifr->ifr_buffer.length = descrlen; 2373 } 2374 sx_sunlock(&ifdescr_sx); 2375 break; 2376 2377 case SIOCSIFDESCR: 2378 error = priv_check(td, PRIV_NET_SETIFDESCR); 2379 if (error) 2380 return (error); 2381 2382 /* 2383 * Copy only (length-1) bytes to make sure that 2384 * if_description is always nul terminated. The 2385 * length parameter is supposed to count the 2386 * terminating nul in. 2387 */ 2388 if (ifr->ifr_buffer.length > ifdescr_maxlen) 2389 return (ENAMETOOLONG); 2390 else if (ifr->ifr_buffer.length == 0) 2391 descrbuf = NULL; 2392 else { 2393 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR, 2394 M_WAITOK | M_ZERO); 2395 error = copyin(ifr->ifr_buffer.buffer, descrbuf, 2396 ifr->ifr_buffer.length - 1); 2397 if (error) { 2398 free(descrbuf, M_IFDESCR); 2399 break; 2400 } 2401 } 2402 2403 sx_xlock(&ifdescr_sx); 2404 odescrbuf = ifp->if_description; 2405 ifp->if_description = descrbuf; 2406 sx_xunlock(&ifdescr_sx); 2407 2408 getmicrotime(&ifp->if_lastchange); 2409 free(odescrbuf, M_IFDESCR); 2410 break; 2411 2412 case SIOCGIFFIB: 2413 ifr->ifr_fib = ifp->if_fib; 2414 break; 2415 2416 case SIOCSIFFIB: 2417 error = priv_check(td, PRIV_NET_SETIFFIB); 2418 if (error) 2419 return (error); 2420 if (ifr->ifr_fib >= rt_numfibs) 2421 return (EINVAL); 2422 2423 ifp->if_fib = ifr->ifr_fib; 2424 break; 2425 2426 case SIOCSIFFLAGS: 2427 error = priv_check(td, PRIV_NET_SETIFFLAGS); 2428 if (error) 2429 return (error); 2430 /* 2431 * Currently, no driver owned flags pass the IFF_CANTCHANGE 2432 * check, so we don't need special handling here yet. 2433 */ 2434 new_flags = (ifr->ifr_flags & 0xffff) | 2435 (ifr->ifr_flagshigh << 16); 2436 if (ifp->if_flags & IFF_UP && 2437 (new_flags & IFF_UP) == 0) { 2438 if_down(ifp); 2439 } else if (new_flags & IFF_UP && 2440 (ifp->if_flags & IFF_UP) == 0) { 2441 if_up(ifp); 2442 } 2443 /* See if permanently promiscuous mode bit is about to flip */ 2444 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) { 2445 if (new_flags & IFF_PPROMISC) 2446 ifp->if_flags |= IFF_PROMISC; 2447 else if (ifp->if_pcount == 0) 2448 ifp->if_flags &= ~IFF_PROMISC; 2449 log(LOG_INFO, "%s: permanently promiscuous mode %s\n", 2450 ifp->if_xname, 2451 (new_flags & IFF_PPROMISC) ? "enabled" : "disabled"); 2452 } 2453 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 2454 (new_flags &~ IFF_CANTCHANGE); 2455 if (ifp->if_ioctl) { 2456 (void) (*ifp->if_ioctl)(ifp, cmd, data); 2457 } 2458 getmicrotime(&ifp->if_lastchange); 2459 break; 2460 2461 case SIOCSIFCAP: 2462 error = priv_check(td, PRIV_NET_SETIFCAP); 2463 if (error) 2464 return (error); 2465 if (ifp->if_ioctl == NULL) 2466 return (EOPNOTSUPP); 2467 if (ifr->ifr_reqcap & ~ifp->if_capabilities) 2468 return (EINVAL); 2469 error = (*ifp->if_ioctl)(ifp, cmd, data); 2470 if (error == 0) 2471 getmicrotime(&ifp->if_lastchange); 2472 break; 2473 2474 #ifdef MAC 2475 case SIOCSIFMAC: 2476 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp); 2477 break; 2478 #endif 2479 2480 case SIOCSIFNAME: 2481 error = priv_check(td, PRIV_NET_SETIFNAME); 2482 if (error) 2483 return (error); 2484 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 2485 if (error != 0) 2486 return (error); 2487 if (new_name[0] == '\0') 2488 return (EINVAL); 2489 if (ifunit(new_name) != NULL) 2490 return (EEXIST); 2491 2492 /* 2493 * XXX: Locking. Nothing else seems to lock if_flags, 2494 * and there are numerous other races with the 2495 * ifunit() checks not being atomic with namespace 2496 * changes (renames, vmoves, if_attach, etc). 2497 */ 2498 ifp->if_flags |= IFF_RENAMING; 2499 2500 /* Announce the departure of the interface. */ 2501 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 2502 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 2503 2504 log(LOG_INFO, "%s: changing name to '%s'\n", 2505 ifp->if_xname, new_name); 2506 2507 IF_ADDR_WLOCK(ifp); 2508 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 2509 ifa = ifp->if_addr; 2510 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 2511 namelen = strlen(new_name); 2512 onamelen = sdl->sdl_nlen; 2513 /* 2514 * Move the address if needed. This is safe because we 2515 * allocate space for a name of length IFNAMSIZ when we 2516 * create this in if_attach(). 2517 */ 2518 if (namelen != onamelen) { 2519 bcopy(sdl->sdl_data + onamelen, 2520 sdl->sdl_data + namelen, sdl->sdl_alen); 2521 } 2522 bcopy(new_name, sdl->sdl_data, namelen); 2523 sdl->sdl_nlen = namelen; 2524 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 2525 bzero(sdl->sdl_data, onamelen); 2526 while (namelen != 0) 2527 sdl->sdl_data[--namelen] = 0xff; 2528 IF_ADDR_WUNLOCK(ifp); 2529 2530 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 2531 /* Announce the return of the interface. */ 2532 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 2533 2534 ifp->if_flags &= ~IFF_RENAMING; 2535 break; 2536 2537 #ifdef VIMAGE 2538 case SIOCSIFVNET: 2539 error = priv_check(td, PRIV_NET_SETIFVNET); 2540 if (error) 2541 return (error); 2542 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid); 2543 break; 2544 #endif 2545 2546 case SIOCSIFMETRIC: 2547 error = priv_check(td, PRIV_NET_SETIFMETRIC); 2548 if (error) 2549 return (error); 2550 ifp->if_metric = ifr->ifr_metric; 2551 getmicrotime(&ifp->if_lastchange); 2552 break; 2553 2554 case SIOCSIFPHYS: 2555 error = priv_check(td, PRIV_NET_SETIFPHYS); 2556 if (error) 2557 return (error); 2558 if (ifp->if_ioctl == NULL) 2559 return (EOPNOTSUPP); 2560 error = (*ifp->if_ioctl)(ifp, cmd, data); 2561 if (error == 0) 2562 getmicrotime(&ifp->if_lastchange); 2563 break; 2564 2565 case SIOCSIFMTU: 2566 { 2567 u_long oldmtu = ifp->if_mtu; 2568 2569 error = priv_check(td, PRIV_NET_SETIFMTU); 2570 if (error) 2571 return (error); 2572 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) 2573 return (EINVAL); 2574 if (ifp->if_ioctl == NULL) 2575 return (EOPNOTSUPP); 2576 error = (*ifp->if_ioctl)(ifp, cmd, data); 2577 if (error == 0) { 2578 getmicrotime(&ifp->if_lastchange); 2579 rt_ifmsg(ifp); 2580 } 2581 /* 2582 * If the link MTU changed, do network layer specific procedure. 2583 */ 2584 if (ifp->if_mtu != oldmtu) { 2585 #ifdef INET6 2586 nd6_setmtu(ifp); 2587 #endif 2588 } 2589 break; 2590 } 2591 2592 case SIOCADDMULTI: 2593 case SIOCDELMULTI: 2594 if (cmd == SIOCADDMULTI) 2595 error = priv_check(td, PRIV_NET_ADDMULTI); 2596 else 2597 error = priv_check(td, PRIV_NET_DELMULTI); 2598 if (error) 2599 return (error); 2600 2601 /* Don't allow group membership on non-multicast interfaces. */ 2602 if ((ifp->if_flags & IFF_MULTICAST) == 0) 2603 return (EOPNOTSUPP); 2604 2605 /* Don't let users screw up protocols' entries. */ 2606 if (ifr->ifr_addr.sa_family != AF_LINK) 2607 return (EINVAL); 2608 2609 if (cmd == SIOCADDMULTI) { 2610 struct ifmultiaddr *ifma; 2611 2612 /* 2613 * Userland is only permitted to join groups once 2614 * via the if_addmulti() KPI, because it cannot hold 2615 * struct ifmultiaddr * between calls. It may also 2616 * lose a race while we check if the membership 2617 * already exists. 2618 */ 2619 IF_ADDR_RLOCK(ifp); 2620 ifma = if_findmulti(ifp, &ifr->ifr_addr); 2621 IF_ADDR_RUNLOCK(ifp); 2622 if (ifma != NULL) 2623 error = EADDRINUSE; 2624 else 2625 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 2626 } else { 2627 error = if_delmulti(ifp, &ifr->ifr_addr); 2628 } 2629 if (error == 0) 2630 getmicrotime(&ifp->if_lastchange); 2631 break; 2632 2633 case SIOCSIFPHYADDR: 2634 case SIOCDIFPHYADDR: 2635 #ifdef INET6 2636 case SIOCSIFPHYADDR_IN6: 2637 #endif 2638 case SIOCSIFMEDIA: 2639 case SIOCSIFGENERIC: 2640 error = priv_check(td, PRIV_NET_HWIOCTL); 2641 if (error) 2642 return (error); 2643 if (ifp->if_ioctl == NULL) 2644 return (EOPNOTSUPP); 2645 error = (*ifp->if_ioctl)(ifp, cmd, data); 2646 if (error == 0) 2647 getmicrotime(&ifp->if_lastchange); 2648 break; 2649 2650 case SIOCGIFSTATUS: 2651 case SIOCGIFPSRCADDR: 2652 case SIOCGIFPDSTADDR: 2653 case SIOCGIFMEDIA: 2654 case SIOCGIFGENERIC: 2655 if (ifp->if_ioctl == NULL) 2656 return (EOPNOTSUPP); 2657 error = (*ifp->if_ioctl)(ifp, cmd, data); 2658 break; 2659 2660 case SIOCSIFLLADDR: 2661 error = priv_check(td, PRIV_NET_SETLLADDR); 2662 if (error) 2663 return (error); 2664 error = if_setlladdr(ifp, 2665 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); 2666 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 2667 break; 2668 2669 case SIOCAIFGROUP: 2670 { 2671 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2672 2673 error = priv_check(td, PRIV_NET_ADDIFGROUP); 2674 if (error) 2675 return (error); 2676 if ((error = if_addgroup(ifp, ifgr->ifgr_group))) 2677 return (error); 2678 break; 2679 } 2680 2681 case SIOCGIFGROUP: 2682 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp))) 2683 return (error); 2684 break; 2685 2686 case SIOCDIFGROUP: 2687 { 2688 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2689 2690 error = priv_check(td, PRIV_NET_DELIFGROUP); 2691 if (error) 2692 return (error); 2693 if ((error = if_delgroup(ifp, ifgr->ifgr_group))) 2694 return (error); 2695 break; 2696 } 2697 2698 default: 2699 error = ENOIOCTL; 2700 break; 2701 } 2702 return (error); 2703 } 2704 2705 #ifdef COMPAT_FREEBSD32 2706 struct ifconf32 { 2707 int32_t ifc_len; 2708 union { 2709 uint32_t ifcu_buf; 2710 uint32_t ifcu_req; 2711 } ifc_ifcu; 2712 }; 2713 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32) 2714 #endif 2715 2716 /* 2717 * Interface ioctls. 2718 */ 2719 int 2720 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td) 2721 { 2722 struct ifnet *ifp; 2723 struct ifreq *ifr; 2724 int error; 2725 int oif_flags; 2726 2727 CURVNET_SET(so->so_vnet); 2728 switch (cmd) { 2729 case SIOCGIFCONF: 2730 error = ifconf(cmd, data); 2731 CURVNET_RESTORE(); 2732 return (error); 2733 2734 #ifdef COMPAT_FREEBSD32 2735 case SIOCGIFCONF32: 2736 { 2737 struct ifconf32 *ifc32; 2738 struct ifconf ifc; 2739 2740 ifc32 = (struct ifconf32 *)data; 2741 ifc.ifc_len = ifc32->ifc_len; 2742 ifc.ifc_buf = PTRIN(ifc32->ifc_buf); 2743 2744 error = ifconf(SIOCGIFCONF, (void *)&ifc); 2745 CURVNET_RESTORE(); 2746 if (error == 0) 2747 ifc32->ifc_len = ifc.ifc_len; 2748 return (error); 2749 } 2750 #endif 2751 } 2752 ifr = (struct ifreq *)data; 2753 2754 switch (cmd) { 2755 #ifdef VIMAGE 2756 case SIOCSIFRVNET: 2757 error = priv_check(td, PRIV_NET_SETIFVNET); 2758 if (error == 0) 2759 error = if_vmove_reclaim(td, ifr->ifr_name, 2760 ifr->ifr_jid); 2761 CURVNET_RESTORE(); 2762 return (error); 2763 #endif 2764 case SIOCIFCREATE: 2765 case SIOCIFCREATE2: 2766 error = priv_check(td, PRIV_NET_IFCREATE); 2767 if (error == 0) 2768 error = if_clone_create(ifr->ifr_name, 2769 sizeof(ifr->ifr_name), 2770 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL); 2771 CURVNET_RESTORE(); 2772 return (error); 2773 case SIOCIFDESTROY: 2774 error = priv_check(td, PRIV_NET_IFDESTROY); 2775 if (error == 0) 2776 error = if_clone_destroy(ifr->ifr_name); 2777 CURVNET_RESTORE(); 2778 return (error); 2779 2780 case SIOCIFGCLONERS: 2781 error = if_clone_list((struct if_clonereq *)data); 2782 CURVNET_RESTORE(); 2783 return (error); 2784 case SIOCGIFGMEMB: 2785 error = if_getgroupmembers((struct ifgroupreq *)data); 2786 CURVNET_RESTORE(); 2787 return (error); 2788 #if defined(INET) || defined(INET6) 2789 case SIOCSVH: 2790 case SIOCGVH: 2791 if (carp_ioctl_p == NULL) 2792 error = EPROTONOSUPPORT; 2793 else 2794 error = (*carp_ioctl_p)(ifr, cmd, td); 2795 CURVNET_RESTORE(); 2796 return (error); 2797 #endif 2798 } 2799 2800 ifp = ifunit_ref(ifr->ifr_name); 2801 if (ifp == NULL) { 2802 CURVNET_RESTORE(); 2803 return (ENXIO); 2804 } 2805 2806 error = ifhwioctl(cmd, ifp, data, td); 2807 if (error != ENOIOCTL) { 2808 if_rele(ifp); 2809 CURVNET_RESTORE(); 2810 return (error); 2811 } 2812 2813 oif_flags = ifp->if_flags; 2814 if (so->so_proto == NULL) { 2815 if_rele(ifp); 2816 CURVNET_RESTORE(); 2817 return (EOPNOTSUPP); 2818 } 2819 2820 /* 2821 * Pass the request on to the socket control method, and if the 2822 * latter returns EOPNOTSUPP, directly to the interface. 2823 * 2824 * Make an exception for the legacy SIOCSIF* requests. Drivers 2825 * trust SIOCSIFADDR et al to come from an already privileged 2826 * layer, and do not perform any credentials checks or input 2827 * validation. 2828 */ 2829 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 2830 ifp, td)); 2831 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL && 2832 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR && 2833 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK) 2834 error = (*ifp->if_ioctl)(ifp, cmd, data); 2835 2836 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 2837 #ifdef INET6 2838 if (ifp->if_flags & IFF_UP) 2839 in6_if_up(ifp); 2840 #endif 2841 } 2842 if_rele(ifp); 2843 CURVNET_RESTORE(); 2844 return (error); 2845 } 2846 2847 /* 2848 * The code common to handling reference counted flags, 2849 * e.g., in ifpromisc() and if_allmulti(). 2850 * The "pflag" argument can specify a permanent mode flag to check, 2851 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none. 2852 * 2853 * Only to be used on stack-owned flags, not driver-owned flags. 2854 */ 2855 static int 2856 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch) 2857 { 2858 struct ifreq ifr; 2859 int error; 2860 int oldflags, oldcount; 2861 2862 /* Sanity checks to catch programming errors */ 2863 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0, 2864 ("%s: setting driver-owned flag %d", __func__, flag)); 2865 2866 if (onswitch) 2867 KASSERT(*refcount >= 0, 2868 ("%s: increment negative refcount %d for flag %d", 2869 __func__, *refcount, flag)); 2870 else 2871 KASSERT(*refcount > 0, 2872 ("%s: decrement non-positive refcount %d for flag %d", 2873 __func__, *refcount, flag)); 2874 2875 /* In case this mode is permanent, just touch refcount */ 2876 if (ifp->if_flags & pflag) { 2877 *refcount += onswitch ? 1 : -1; 2878 return (0); 2879 } 2880 2881 /* Save ifnet parameters for if_ioctl() may fail */ 2882 oldcount = *refcount; 2883 oldflags = ifp->if_flags; 2884 2885 /* 2886 * See if we aren't the only and touching refcount is enough. 2887 * Actually toggle interface flag if we are the first or last. 2888 */ 2889 if (onswitch) { 2890 if ((*refcount)++) 2891 return (0); 2892 ifp->if_flags |= flag; 2893 } else { 2894 if (--(*refcount)) 2895 return (0); 2896 ifp->if_flags &= ~flag; 2897 } 2898 2899 /* Call down the driver since we've changed interface flags */ 2900 if (ifp->if_ioctl == NULL) { 2901 error = EOPNOTSUPP; 2902 goto recover; 2903 } 2904 ifr.ifr_flags = ifp->if_flags & 0xffff; 2905 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2906 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 2907 if (error) 2908 goto recover; 2909 /* Notify userland that interface flags have changed */ 2910 rt_ifmsg(ifp); 2911 return (0); 2912 2913 recover: 2914 /* Recover after driver error */ 2915 *refcount = oldcount; 2916 ifp->if_flags = oldflags; 2917 return (error); 2918 } 2919 2920 /* 2921 * Set/clear promiscuous mode on interface ifp based on the truth value 2922 * of pswitch. The calls are reference counted so that only the first 2923 * "on" request actually has an effect, as does the final "off" request. 2924 * Results are undefined if the "off" and "on" requests are not matched. 2925 */ 2926 int 2927 ifpromisc(struct ifnet *ifp, int pswitch) 2928 { 2929 int error; 2930 int oldflags = ifp->if_flags; 2931 2932 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC, 2933 &ifp->if_pcount, pswitch); 2934 /* If promiscuous mode status has changed, log a message */ 2935 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC)) 2936 log(LOG_INFO, "%s: promiscuous mode %s\n", 2937 ifp->if_xname, 2938 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled"); 2939 return (error); 2940 } 2941 2942 /* 2943 * Return interface configuration 2944 * of system. List may be used 2945 * in later ioctl's (above) to get 2946 * other information. 2947 */ 2948 /*ARGSUSED*/ 2949 static int 2950 ifconf(u_long cmd, caddr_t data) 2951 { 2952 struct ifconf *ifc = (struct ifconf *)data; 2953 struct ifnet *ifp; 2954 struct ifaddr *ifa; 2955 struct ifreq ifr; 2956 struct sbuf *sb; 2957 int error, full = 0, valid_len, max_len; 2958 2959 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */ 2960 max_len = MAXPHYS - 1; 2961 2962 /* Prevent hostile input from being able to crash the system */ 2963 if (ifc->ifc_len <= 0) 2964 return (EINVAL); 2965 2966 again: 2967 if (ifc->ifc_len <= max_len) { 2968 max_len = ifc->ifc_len; 2969 full = 1; 2970 } 2971 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN); 2972 max_len = 0; 2973 valid_len = 0; 2974 2975 IFNET_RLOCK(); 2976 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2977 int addrs; 2978 2979 /* 2980 * Zero the ifr_name buffer to make sure we don't 2981 * disclose the contents of the stack. 2982 */ 2983 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name)); 2984 2985 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 2986 >= sizeof(ifr.ifr_name)) { 2987 sbuf_delete(sb); 2988 IFNET_RUNLOCK(); 2989 return (ENAMETOOLONG); 2990 } 2991 2992 addrs = 0; 2993 IF_ADDR_RLOCK(ifp); 2994 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2995 struct sockaddr *sa = ifa->ifa_addr; 2996 2997 if (prison_if(curthread->td_ucred, sa) != 0) 2998 continue; 2999 addrs++; 3000 if (sa->sa_len <= sizeof(*sa)) { 3001 ifr.ifr_addr = *sa; 3002 sbuf_bcat(sb, &ifr, sizeof(ifr)); 3003 max_len += sizeof(ifr); 3004 } else { 3005 sbuf_bcat(sb, &ifr, 3006 offsetof(struct ifreq, ifr_addr)); 3007 max_len += offsetof(struct ifreq, ifr_addr); 3008 sbuf_bcat(sb, sa, sa->sa_len); 3009 max_len += sa->sa_len; 3010 } 3011 3012 if (sbuf_error(sb) == 0) 3013 valid_len = sbuf_len(sb); 3014 } 3015 IF_ADDR_RUNLOCK(ifp); 3016 if (addrs == 0) { 3017 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr)); 3018 sbuf_bcat(sb, &ifr, sizeof(ifr)); 3019 max_len += sizeof(ifr); 3020 3021 if (sbuf_error(sb) == 0) 3022 valid_len = sbuf_len(sb); 3023 } 3024 } 3025 IFNET_RUNLOCK(); 3026 3027 /* 3028 * If we didn't allocate enough space (uncommon), try again. If 3029 * we have already allocated as much space as we are allowed, 3030 * return what we've got. 3031 */ 3032 if (valid_len != max_len && !full) { 3033 sbuf_delete(sb); 3034 goto again; 3035 } 3036 3037 ifc->ifc_len = valid_len; 3038 sbuf_finish(sb); 3039 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len); 3040 sbuf_delete(sb); 3041 return (error); 3042 } 3043 3044 /* 3045 * Just like ifpromisc(), but for all-multicast-reception mode. 3046 */ 3047 int 3048 if_allmulti(struct ifnet *ifp, int onswitch) 3049 { 3050 3051 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch)); 3052 } 3053 3054 struct ifmultiaddr * 3055 if_findmulti(struct ifnet *ifp, struct sockaddr *sa) 3056 { 3057 struct ifmultiaddr *ifma; 3058 3059 IF_ADDR_LOCK_ASSERT(ifp); 3060 3061 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 3062 if (sa->sa_family == AF_LINK) { 3063 if (sa_dl_equal(ifma->ifma_addr, sa)) 3064 break; 3065 } else { 3066 if (sa_equal(ifma->ifma_addr, sa)) 3067 break; 3068 } 3069 } 3070 3071 return ifma; 3072 } 3073 3074 /* 3075 * Allocate a new ifmultiaddr and initialize based on passed arguments. We 3076 * make copies of passed sockaddrs. The ifmultiaddr will not be added to 3077 * the ifnet multicast address list here, so the caller must do that and 3078 * other setup work (such as notifying the device driver). The reference 3079 * count is initialized to 1. 3080 */ 3081 static struct ifmultiaddr * 3082 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa, 3083 int mflags) 3084 { 3085 struct ifmultiaddr *ifma; 3086 struct sockaddr *dupsa; 3087 3088 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags | 3089 M_ZERO); 3090 if (ifma == NULL) 3091 return (NULL); 3092 3093 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags); 3094 if (dupsa == NULL) { 3095 free(ifma, M_IFMADDR); 3096 return (NULL); 3097 } 3098 bcopy(sa, dupsa, sa->sa_len); 3099 ifma->ifma_addr = dupsa; 3100 3101 ifma->ifma_ifp = ifp; 3102 ifma->ifma_refcount = 1; 3103 ifma->ifma_protospec = NULL; 3104 3105 if (llsa == NULL) { 3106 ifma->ifma_lladdr = NULL; 3107 return (ifma); 3108 } 3109 3110 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags); 3111 if (dupsa == NULL) { 3112 free(ifma->ifma_addr, M_IFMADDR); 3113 free(ifma, M_IFMADDR); 3114 return (NULL); 3115 } 3116 bcopy(llsa, dupsa, llsa->sa_len); 3117 ifma->ifma_lladdr = dupsa; 3118 3119 return (ifma); 3120 } 3121 3122 /* 3123 * if_freemulti: free ifmultiaddr structure and possibly attached related 3124 * addresses. The caller is responsible for implementing reference 3125 * counting, notifying the driver, handling routing messages, and releasing 3126 * any dependent link layer state. 3127 */ 3128 static void 3129 if_freemulti(struct ifmultiaddr *ifma) 3130 { 3131 3132 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d", 3133 ifma->ifma_refcount)); 3134 3135 if (ifma->ifma_lladdr != NULL) 3136 free(ifma->ifma_lladdr, M_IFMADDR); 3137 free(ifma->ifma_addr, M_IFMADDR); 3138 free(ifma, M_IFMADDR); 3139 } 3140 3141 /* 3142 * Register an additional multicast address with a network interface. 3143 * 3144 * - If the address is already present, bump the reference count on the 3145 * address and return. 3146 * - If the address is not link-layer, look up a link layer address. 3147 * - Allocate address structures for one or both addresses, and attach to the 3148 * multicast address list on the interface. If automatically adding a link 3149 * layer address, the protocol address will own a reference to the link 3150 * layer address, to be freed when it is freed. 3151 * - Notify the network device driver of an addition to the multicast address 3152 * list. 3153 * 3154 * 'sa' points to caller-owned memory with the desired multicast address. 3155 * 3156 * 'retifma' will be used to return a pointer to the resulting multicast 3157 * address reference, if desired. 3158 */ 3159 int 3160 if_addmulti(struct ifnet *ifp, struct sockaddr *sa, 3161 struct ifmultiaddr **retifma) 3162 { 3163 struct ifmultiaddr *ifma, *ll_ifma; 3164 struct sockaddr *llsa; 3165 struct sockaddr_dl sdl; 3166 int error; 3167 3168 /* 3169 * If the address is already present, return a new reference to it; 3170 * otherwise, allocate storage and set up a new address. 3171 */ 3172 IF_ADDR_WLOCK(ifp); 3173 ifma = if_findmulti(ifp, sa); 3174 if (ifma != NULL) { 3175 ifma->ifma_refcount++; 3176 if (retifma != NULL) 3177 *retifma = ifma; 3178 IF_ADDR_WUNLOCK(ifp); 3179 return (0); 3180 } 3181 3182 /* 3183 * The address isn't already present; resolve the protocol address 3184 * into a link layer address, and then look that up, bump its 3185 * refcount or allocate an ifma for that also. 3186 * Most link layer resolving functions returns address data which 3187 * fits inside default sockaddr_dl structure. However callback 3188 * can allocate another sockaddr structure, in that case we need to 3189 * free it later. 3190 */ 3191 llsa = NULL; 3192 ll_ifma = NULL; 3193 if (ifp->if_resolvemulti != NULL) { 3194 /* Provide called function with buffer size information */ 3195 sdl.sdl_len = sizeof(sdl); 3196 llsa = (struct sockaddr *)&sdl; 3197 error = ifp->if_resolvemulti(ifp, &llsa, sa); 3198 if (error) 3199 goto unlock_out; 3200 } 3201 3202 /* 3203 * Allocate the new address. Don't hook it up yet, as we may also 3204 * need to allocate a link layer multicast address. 3205 */ 3206 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT); 3207 if (ifma == NULL) { 3208 error = ENOMEM; 3209 goto free_llsa_out; 3210 } 3211 3212 /* 3213 * If a link layer address is found, we'll need to see if it's 3214 * already present in the address list, or allocate is as well. 3215 * When this block finishes, the link layer address will be on the 3216 * list. 3217 */ 3218 if (llsa != NULL) { 3219 ll_ifma = if_findmulti(ifp, llsa); 3220 if (ll_ifma == NULL) { 3221 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT); 3222 if (ll_ifma == NULL) { 3223 --ifma->ifma_refcount; 3224 if_freemulti(ifma); 3225 error = ENOMEM; 3226 goto free_llsa_out; 3227 } 3228 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma, 3229 ifma_link); 3230 } else 3231 ll_ifma->ifma_refcount++; 3232 ifma->ifma_llifma = ll_ifma; 3233 } 3234 3235 /* 3236 * We now have a new multicast address, ifma, and possibly a new or 3237 * referenced link layer address. Add the primary address to the 3238 * ifnet address list. 3239 */ 3240 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 3241 3242 if (retifma != NULL) 3243 *retifma = ifma; 3244 3245 /* 3246 * Must generate the message while holding the lock so that 'ifma' 3247 * pointer is still valid. 3248 */ 3249 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 3250 IF_ADDR_WUNLOCK(ifp); 3251 3252 /* 3253 * We are certain we have added something, so call down to the 3254 * interface to let them know about it. 3255 */ 3256 if (ifp->if_ioctl != NULL) { 3257 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0); 3258 } 3259 3260 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3261 link_free_sdl(llsa); 3262 3263 return (0); 3264 3265 free_llsa_out: 3266 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3267 link_free_sdl(llsa); 3268 3269 unlock_out: 3270 IF_ADDR_WUNLOCK(ifp); 3271 return (error); 3272 } 3273 3274 /* 3275 * Delete a multicast group membership by network-layer group address. 3276 * 3277 * Returns ENOENT if the entry could not be found. If ifp no longer 3278 * exists, results are undefined. This entry point should only be used 3279 * from subsystems which do appropriate locking to hold ifp for the 3280 * duration of the call. 3281 * Network-layer protocol domains must use if_delmulti_ifma(). 3282 */ 3283 int 3284 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 3285 { 3286 struct ifmultiaddr *ifma; 3287 int lastref; 3288 #ifdef INVARIANTS 3289 struct ifnet *oifp; 3290 3291 IFNET_RLOCK_NOSLEEP(); 3292 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3293 if (ifp == oifp) 3294 break; 3295 if (ifp != oifp) 3296 ifp = NULL; 3297 IFNET_RUNLOCK_NOSLEEP(); 3298 3299 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__)); 3300 #endif 3301 if (ifp == NULL) 3302 return (ENOENT); 3303 3304 IF_ADDR_WLOCK(ifp); 3305 lastref = 0; 3306 ifma = if_findmulti(ifp, sa); 3307 if (ifma != NULL) 3308 lastref = if_delmulti_locked(ifp, ifma, 0); 3309 IF_ADDR_WUNLOCK(ifp); 3310 3311 if (ifma == NULL) 3312 return (ENOENT); 3313 3314 if (lastref && ifp->if_ioctl != NULL) { 3315 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3316 } 3317 3318 return (0); 3319 } 3320 3321 /* 3322 * Delete all multicast group membership for an interface. 3323 * Should be used to quickly flush all multicast filters. 3324 */ 3325 void 3326 if_delallmulti(struct ifnet *ifp) 3327 { 3328 struct ifmultiaddr *ifma; 3329 struct ifmultiaddr *next; 3330 3331 IF_ADDR_WLOCK(ifp); 3332 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 3333 if_delmulti_locked(ifp, ifma, 0); 3334 IF_ADDR_WUNLOCK(ifp); 3335 } 3336 3337 /* 3338 * Delete a multicast group membership by group membership pointer. 3339 * Network-layer protocol domains must use this routine. 3340 * 3341 * It is safe to call this routine if the ifp disappeared. 3342 */ 3343 void 3344 if_delmulti_ifma(struct ifmultiaddr *ifma) 3345 { 3346 struct ifnet *ifp; 3347 int lastref; 3348 3349 ifp = ifma->ifma_ifp; 3350 #ifdef DIAGNOSTIC 3351 if (ifp == NULL) { 3352 printf("%s: ifma_ifp seems to be detached\n", __func__); 3353 } else { 3354 struct ifnet *oifp; 3355 3356 IFNET_RLOCK_NOSLEEP(); 3357 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3358 if (ifp == oifp) 3359 break; 3360 if (ifp != oifp) { 3361 printf("%s: ifnet %p disappeared\n", __func__, ifp); 3362 ifp = NULL; 3363 } 3364 IFNET_RUNLOCK_NOSLEEP(); 3365 } 3366 #endif 3367 /* 3368 * If and only if the ifnet instance exists: Acquire the address lock. 3369 */ 3370 if (ifp != NULL) 3371 IF_ADDR_WLOCK(ifp); 3372 3373 lastref = if_delmulti_locked(ifp, ifma, 0); 3374 3375 if (ifp != NULL) { 3376 /* 3377 * If and only if the ifnet instance exists: 3378 * Release the address lock. 3379 * If the group was left: update the hardware hash filter. 3380 */ 3381 IF_ADDR_WUNLOCK(ifp); 3382 if (lastref && ifp->if_ioctl != NULL) { 3383 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3384 } 3385 } 3386 } 3387 3388 /* 3389 * Perform deletion of network-layer and/or link-layer multicast address. 3390 * 3391 * Return 0 if the reference count was decremented. 3392 * Return 1 if the final reference was released, indicating that the 3393 * hardware hash filter should be reprogrammed. 3394 */ 3395 static int 3396 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching) 3397 { 3398 struct ifmultiaddr *ll_ifma; 3399 3400 if (ifp != NULL && ifma->ifma_ifp != NULL) { 3401 KASSERT(ifma->ifma_ifp == ifp, 3402 ("%s: inconsistent ifp %p", __func__, ifp)); 3403 IF_ADDR_WLOCK_ASSERT(ifp); 3404 } 3405 3406 ifp = ifma->ifma_ifp; 3407 3408 /* 3409 * If the ifnet is detaching, null out references to ifnet, 3410 * so that upper protocol layers will notice, and not attempt 3411 * to obtain locks for an ifnet which no longer exists. The 3412 * routing socket announcement must happen before the ifnet 3413 * instance is detached from the system. 3414 */ 3415 if (detaching) { 3416 #ifdef DIAGNOSTIC 3417 printf("%s: detaching ifnet instance %p\n", __func__, ifp); 3418 #endif 3419 /* 3420 * ifp may already be nulled out if we are being reentered 3421 * to delete the ll_ifma. 3422 */ 3423 if (ifp != NULL) { 3424 rt_newmaddrmsg(RTM_DELMADDR, ifma); 3425 ifma->ifma_ifp = NULL; 3426 } 3427 } 3428 3429 if (--ifma->ifma_refcount > 0) 3430 return 0; 3431 3432 /* 3433 * If this ifma is a network-layer ifma, a link-layer ifma may 3434 * have been associated with it. Release it first if so. 3435 */ 3436 ll_ifma = ifma->ifma_llifma; 3437 if (ll_ifma != NULL) { 3438 KASSERT(ifma->ifma_lladdr != NULL, 3439 ("%s: llifma w/o lladdr", __func__)); 3440 if (detaching) 3441 ll_ifma->ifma_ifp = NULL; /* XXX */ 3442 if (--ll_ifma->ifma_refcount == 0) { 3443 if (ifp != NULL) { 3444 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, 3445 ifma_link); 3446 } 3447 if_freemulti(ll_ifma); 3448 } 3449 } 3450 3451 if (ifp != NULL) 3452 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 3453 3454 if_freemulti(ifma); 3455 3456 /* 3457 * The last reference to this instance of struct ifmultiaddr 3458 * was released; the hardware should be notified of this change. 3459 */ 3460 return 1; 3461 } 3462 3463 /* 3464 * Set the link layer address on an interface. 3465 * 3466 * At this time we only support certain types of interfaces, 3467 * and we don't allow the length of the address to change. 3468 */ 3469 int 3470 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 3471 { 3472 struct sockaddr_dl *sdl; 3473 struct ifaddr *ifa; 3474 struct ifreq ifr; 3475 3476 IF_ADDR_RLOCK(ifp); 3477 ifa = ifp->if_addr; 3478 if (ifa == NULL) { 3479 IF_ADDR_RUNLOCK(ifp); 3480 return (EINVAL); 3481 } 3482 ifa_ref(ifa); 3483 IF_ADDR_RUNLOCK(ifp); 3484 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 3485 if (sdl == NULL) { 3486 ifa_free(ifa); 3487 return (EINVAL); 3488 } 3489 if (len != sdl->sdl_alen) { /* don't allow length to change */ 3490 ifa_free(ifa); 3491 return (EINVAL); 3492 } 3493 switch (ifp->if_type) { 3494 case IFT_ETHER: 3495 case IFT_FDDI: 3496 case IFT_XETHER: 3497 case IFT_ISO88025: 3498 case IFT_L2VLAN: 3499 case IFT_BRIDGE: 3500 case IFT_ARCNET: 3501 case IFT_IEEE8023ADLAG: 3502 case IFT_IEEE80211: 3503 bcopy(lladdr, LLADDR(sdl), len); 3504 ifa_free(ifa); 3505 break; 3506 default: 3507 ifa_free(ifa); 3508 return (ENODEV); 3509 } 3510 3511 /* 3512 * If the interface is already up, we need 3513 * to re-init it in order to reprogram its 3514 * address filter. 3515 */ 3516 if ((ifp->if_flags & IFF_UP) != 0) { 3517 if (ifp->if_ioctl) { 3518 ifp->if_flags &= ~IFF_UP; 3519 ifr.ifr_flags = ifp->if_flags & 0xffff; 3520 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3521 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3522 ifp->if_flags |= IFF_UP; 3523 ifr.ifr_flags = ifp->if_flags & 0xffff; 3524 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3525 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3526 } 3527 #ifdef INET 3528 /* 3529 * Also send gratuitous ARPs to notify other nodes about 3530 * the address change. 3531 */ 3532 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 3533 if (ifa->ifa_addr->sa_family == AF_INET) 3534 arp_ifinit(ifp, ifa); 3535 } 3536 #endif 3537 } 3538 return (0); 3539 } 3540 3541 /* 3542 * The name argument must be a pointer to storage which will last as 3543 * long as the interface does. For physical devices, the result of 3544 * device_get_name(dev) is a good choice and for pseudo-devices a 3545 * static string works well. 3546 */ 3547 void 3548 if_initname(struct ifnet *ifp, const char *name, int unit) 3549 { 3550 ifp->if_dname = name; 3551 ifp->if_dunit = unit; 3552 if (unit != IF_DUNIT_NONE) 3553 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 3554 else 3555 strlcpy(ifp->if_xname, name, IFNAMSIZ); 3556 } 3557 3558 int 3559 if_printf(struct ifnet *ifp, const char * fmt, ...) 3560 { 3561 va_list ap; 3562 int retval; 3563 3564 retval = printf("%s: ", ifp->if_xname); 3565 va_start(ap, fmt); 3566 retval += vprintf(fmt, ap); 3567 va_end(ap); 3568 return (retval); 3569 } 3570 3571 void 3572 if_start(struct ifnet *ifp) 3573 { 3574 3575 (*(ifp)->if_start)(ifp); 3576 } 3577 3578 /* 3579 * Backwards compatibility interface for drivers 3580 * that have not implemented it 3581 */ 3582 static int 3583 if_transmit(struct ifnet *ifp, struct mbuf *m) 3584 { 3585 int error; 3586 3587 IFQ_HANDOFF(ifp, m, error); 3588 return (error); 3589 } 3590 3591 int 3592 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust) 3593 { 3594 int active = 0; 3595 3596 IF_LOCK(ifq); 3597 if (_IF_QFULL(ifq)) { 3598 IF_UNLOCK(ifq); 3599 ifp->if_oqdrops++; 3600 m_freem(m); 3601 return (0); 3602 } 3603 if (ifp != NULL) { 3604 ifp->if_obytes += m->m_pkthdr.len + adjust; 3605 if (m->m_flags & (M_BCAST|M_MCAST)) 3606 ifp->if_omcasts++; 3607 active = ifp->if_drv_flags & IFF_DRV_OACTIVE; 3608 } 3609 _IF_ENQUEUE(ifq, m); 3610 IF_UNLOCK(ifq); 3611 if (ifp != NULL && !active) 3612 (*(ifp)->if_start)(ifp); 3613 return (1); 3614 } 3615 3616 void 3617 if_register_com_alloc(u_char type, 3618 if_com_alloc_t *a, if_com_free_t *f) 3619 { 3620 3621 KASSERT(if_com_alloc[type] == NULL, 3622 ("if_register_com_alloc: %d already registered", type)); 3623 KASSERT(if_com_free[type] == NULL, 3624 ("if_register_com_alloc: %d free already registered", type)); 3625 3626 if_com_alloc[type] = a; 3627 if_com_free[type] = f; 3628 } 3629 3630 void 3631 if_deregister_com_alloc(u_char type) 3632 { 3633 3634 KASSERT(if_com_alloc[type] != NULL, 3635 ("if_deregister_com_alloc: %d not registered", type)); 3636 KASSERT(if_com_free[type] != NULL, 3637 ("if_deregister_com_alloc: %d free not registered", type)); 3638 if_com_alloc[type] = NULL; 3639 if_com_free[type] = NULL; 3640 } 3641 3642 /* API for driver access to network stack owned ifnet.*/ 3643 uint64_t 3644 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate) 3645 { 3646 uint64_t oldbrate; 3647 3648 oldbrate = ifp->if_baudrate; 3649 ifp->if_baudrate = baudrate; 3650 return (oldbrate); 3651 } 3652 3653 uint64_t 3654 if_getbaudrate(if_t ifp) 3655 { 3656 3657 return (((struct ifnet *)ifp)->if_baudrate); 3658 } 3659 3660 int 3661 if_setcapabilities(if_t ifp, int capabilities) 3662 { 3663 ((struct ifnet *)ifp)->if_capabilities = capabilities; 3664 return (0); 3665 } 3666 3667 int 3668 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit) 3669 { 3670 ((struct ifnet *)ifp)->if_capabilities |= setbit; 3671 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit; 3672 3673 return (0); 3674 } 3675 3676 int 3677 if_getcapabilities(if_t ifp) 3678 { 3679 return ((struct ifnet *)ifp)->if_capabilities; 3680 } 3681 3682 int 3683 if_setcapenable(if_t ifp, int capabilities) 3684 { 3685 ((struct ifnet *)ifp)->if_capenable = capabilities; 3686 return (0); 3687 } 3688 3689 int 3690 if_setcapenablebit(if_t ifp, int setcap, int clearcap) 3691 { 3692 if(setcap) 3693 ((struct ifnet *)ifp)->if_capenable |= setcap; 3694 if(clearcap) 3695 ((struct ifnet *)ifp)->if_capenable &= ~clearcap; 3696 3697 return (0); 3698 } 3699 3700 const char * 3701 if_getdname(if_t ifp) 3702 { 3703 return ((struct ifnet *)ifp)->if_dname; 3704 } 3705 3706 int 3707 if_togglecapenable(if_t ifp, int togglecap) 3708 { 3709 ((struct ifnet *)ifp)->if_capenable ^= togglecap; 3710 return (0); 3711 } 3712 3713 int 3714 if_getcapenable(if_t ifp) 3715 { 3716 return ((struct ifnet *)ifp)->if_capenable; 3717 } 3718 3719 /* 3720 * This is largely undesirable because it ties ifnet to a device, but does 3721 * provide flexiblity for an embedded product vendor. Should be used with 3722 * the understanding that it violates the interface boundaries, and should be 3723 * a last resort only. 3724 */ 3725 int 3726 if_setdev(if_t ifp, void *dev) 3727 { 3728 return (0); 3729 } 3730 3731 int 3732 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags) 3733 { 3734 ((struct ifnet *)ifp)->if_drv_flags |= set_flags; 3735 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags; 3736 3737 return (0); 3738 } 3739 3740 int 3741 if_getdrvflags(if_t ifp) 3742 { 3743 return ((struct ifnet *)ifp)->if_drv_flags; 3744 } 3745 3746 int 3747 if_setdrvflags(if_t ifp, int flags) 3748 { 3749 ((struct ifnet *)ifp)->if_drv_flags = flags; 3750 return (0); 3751 } 3752 3753 3754 int 3755 if_setflags(if_t ifp, int flags) 3756 { 3757 ((struct ifnet *)ifp)->if_flags = flags; 3758 return (0); 3759 } 3760 3761 int 3762 if_setflagbits(if_t ifp, int set, int clear) 3763 { 3764 ((struct ifnet *)ifp)->if_flags |= set; 3765 ((struct ifnet *)ifp)->if_flags &= ~clear; 3766 3767 return (0); 3768 } 3769 3770 int 3771 if_getflags(if_t ifp) 3772 { 3773 return ((struct ifnet *)ifp)->if_flags; 3774 } 3775 3776 int 3777 if_clearhwassist(if_t ifp) 3778 { 3779 ((struct ifnet *)ifp)->if_hwassist = 0; 3780 return (0); 3781 } 3782 3783 int 3784 if_sethwassistbits(if_t ifp, int toset, int toclear) 3785 { 3786 ((struct ifnet *)ifp)->if_hwassist |= toset; 3787 ((struct ifnet *)ifp)->if_hwassist &= ~toclear; 3788 3789 return (0); 3790 } 3791 3792 int 3793 if_sethwassist(if_t ifp, int hwassist_bit) 3794 { 3795 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit; 3796 return (0); 3797 } 3798 3799 int 3800 if_gethwassist(if_t ifp) 3801 { 3802 return ((struct ifnet *)ifp)->if_hwassist; 3803 } 3804 3805 int 3806 if_setmtu(if_t ifp, int mtu) 3807 { 3808 ((struct ifnet *)ifp)->if_mtu = mtu; 3809 return (0); 3810 } 3811 3812 int 3813 if_getmtu(if_t ifp) 3814 { 3815 return ((struct ifnet *)ifp)->if_mtu; 3816 } 3817 3818 int 3819 if_setsoftc(if_t ifp, void *softc) 3820 { 3821 ((struct ifnet *)ifp)->if_softc = softc; 3822 return (0); 3823 } 3824 3825 void * 3826 if_getsoftc(if_t ifp) 3827 { 3828 return ((struct ifnet *)ifp)->if_softc; 3829 } 3830 3831 void 3832 if_setrcvif(struct mbuf *m, if_t ifp) 3833 { 3834 m->m_pkthdr.rcvif = (struct ifnet *)ifp; 3835 } 3836 3837 void 3838 if_setvtag(struct mbuf *m, uint16_t tag) 3839 { 3840 m->m_pkthdr.ether_vtag = tag; 3841 } 3842 3843 uint16_t 3844 if_getvtag(struct mbuf *m) 3845 { 3846 3847 return (m->m_pkthdr.ether_vtag); 3848 } 3849 3850 int 3851 if_sendq_empty(if_t ifp) 3852 { 3853 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd); 3854 } 3855 3856 struct ifaddr * 3857 if_getifaddr(if_t ifp) 3858 { 3859 return ((struct ifnet *)ifp)->if_addr; 3860 } 3861 3862 int 3863 if_getamcount(if_t ifp) 3864 { 3865 return ((struct ifnet *)ifp)->if_amcount; 3866 } 3867 3868 3869 int 3870 if_setsendqready(if_t ifp) 3871 { 3872 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd); 3873 return (0); 3874 } 3875 3876 int 3877 if_setsendqlen(if_t ifp, int tx_desc_count) 3878 { 3879 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count); 3880 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count; 3881 3882 return (0); 3883 } 3884 3885 int 3886 if_vlantrunkinuse(if_t ifp) 3887 { 3888 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0; 3889 } 3890 3891 int 3892 if_input(if_t ifp, struct mbuf* sendmp) 3893 { 3894 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp); 3895 return (0); 3896 3897 } 3898 3899 /* XXX */ 3900 #ifndef ETH_ADDR_LEN 3901 #define ETH_ADDR_LEN 6 3902 #endif 3903 3904 int 3905 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max) 3906 { 3907 struct ifmultiaddr *ifma; 3908 uint8_t *lmta = (uint8_t *)mta; 3909 int mcnt = 0; 3910 3911 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 3912 if (ifma->ifma_addr->sa_family != AF_LINK) 3913 continue; 3914 3915 if (mcnt == max) 3916 break; 3917 3918 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 3919 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN); 3920 mcnt++; 3921 } 3922 *cnt = mcnt; 3923 3924 return (0); 3925 } 3926 3927 int 3928 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max) 3929 { 3930 int error; 3931 3932 if_maddr_rlock(ifp); 3933 error = if_setupmultiaddr(ifp, mta, cnt, max); 3934 if_maddr_runlock(ifp); 3935 return (error); 3936 } 3937 3938 int 3939 if_multiaddr_count(if_t ifp, int max) 3940 { 3941 struct ifmultiaddr *ifma; 3942 int count; 3943 3944 count = 0; 3945 if_maddr_rlock(ifp); 3946 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 3947 if (ifma->ifma_addr->sa_family != AF_LINK) 3948 continue; 3949 count++; 3950 if (count == max) 3951 break; 3952 } 3953 if_maddr_runlock(ifp); 3954 return (count); 3955 } 3956 3957 struct mbuf * 3958 if_dequeue(if_t ifp) 3959 { 3960 struct mbuf *m; 3961 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m); 3962 3963 return (m); 3964 } 3965 3966 int 3967 if_sendq_prepend(if_t ifp, struct mbuf *m) 3968 { 3969 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m); 3970 return (0); 3971 } 3972 3973 int 3974 if_setifheaderlen(if_t ifp, int len) 3975 { 3976 ((struct ifnet *)ifp)->if_hdrlen = len; 3977 return (0); 3978 } 3979 3980 caddr_t 3981 if_getlladdr(if_t ifp) 3982 { 3983 return (IF_LLADDR((struct ifnet *)ifp)); 3984 } 3985 3986 void * 3987 if_gethandle(u_char type) 3988 { 3989 return (if_alloc(type)); 3990 } 3991 3992 void 3993 if_bpfmtap(if_t ifh, struct mbuf *m) 3994 { 3995 struct ifnet *ifp = (struct ifnet *)ifh; 3996 3997 BPF_MTAP(ifp, m); 3998 } 3999 4000 void 4001 if_etherbpfmtap(if_t ifh, struct mbuf *m) 4002 { 4003 struct ifnet *ifp = (struct ifnet *)ifh; 4004 4005 ETHER_BPF_MTAP(ifp, m); 4006 } 4007 4008 void 4009 if_vlancap(if_t ifh) 4010 { 4011 struct ifnet *ifp = (struct ifnet *)ifh; 4012 VLAN_CAPABILITIES(ifp); 4013 } 4014 4015 void 4016 if_setinitfn(if_t ifp, void (*init_fn)(void *)) 4017 { 4018 ((struct ifnet *)ifp)->if_init = init_fn; 4019 } 4020 4021 void 4022 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t)) 4023 { 4024 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn; 4025 } 4026 4027 void 4028 if_setstartfn(if_t ifp, void (*start_fn)(if_t)) 4029 { 4030 ((struct ifnet *)ifp)->if_start = (void *)start_fn; 4031 } 4032 4033 void 4034 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn) 4035 { 4036 ((struct ifnet *)ifp)->if_transmit = start_fn; 4037 } 4038 4039 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn) 4040 { 4041 ((struct ifnet *)ifp)->if_qflush = flush_fn; 4042 4043 } 4044 4045 void 4046 if_setgetcounterfn(if_t ifp, if_get_counter_t fn) 4047 { 4048 4049 ifp->if_get_counter = fn; 4050 } 4051 4052 /* Revisit these - These are inline functions originally. */ 4053 int 4054 drbr_inuse_drv(if_t ifh, struct buf_ring *br) 4055 { 4056 return drbr_inuse_drv(ifh, br); 4057 } 4058 4059 struct mbuf* 4060 drbr_dequeue_drv(if_t ifh, struct buf_ring *br) 4061 { 4062 return drbr_dequeue(ifh, br); 4063 } 4064 4065 int 4066 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br) 4067 { 4068 return drbr_needs_enqueue(ifh, br); 4069 } 4070 4071 int 4072 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m) 4073 { 4074 return drbr_enqueue(ifh, br, m); 4075 4076 } 4077