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 TUNABLE_INT("net.link.ifqmaxlen", &ifqmaxlen); 110 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN, 111 &ifqmaxlen, 0, "max send queue size"); 112 113 /* Log link state change events */ 114 static int log_link_state_change = 1; 115 116 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW, 117 &log_link_state_change, 0, 118 "log interface link state change events"); 119 120 /* Interface description */ 121 static unsigned int ifdescr_maxlen = 1024; 122 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW, 123 &ifdescr_maxlen, 0, 124 "administrative maximum length for interface description"); 125 126 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions"); 127 128 /* global sx for non-critical path ifdescr */ 129 static struct sx ifdescr_sx; 130 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr"); 131 132 void (*bridge_linkstate_p)(struct ifnet *ifp); 133 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state); 134 void (*lagg_linkstate_p)(struct ifnet *ifp, int state); 135 /* These are external hooks for CARP. */ 136 void (*carp_linkstate_p)(struct ifnet *ifp); 137 void (*carp_demote_adj_p)(int, char *); 138 int (*carp_master_p)(struct ifaddr *); 139 #if defined(INET) || defined(INET6) 140 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost); 141 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m, 142 const struct sockaddr *sa); 143 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *); 144 int (*carp_attach_p)(struct ifaddr *, int); 145 void (*carp_detach_p)(struct ifaddr *); 146 #endif 147 #ifdef INET 148 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **); 149 #endif 150 #ifdef INET6 151 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6); 152 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m, 153 const struct in6_addr *taddr); 154 #endif 155 156 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL; 157 158 /* 159 * XXX: Style; these should be sorted alphabetically, and unprototyped 160 * static functions should be prototyped. Currently they are sorted by 161 * declaration order. 162 */ 163 static void if_attachdomain(void *); 164 static void if_attachdomain1(struct ifnet *); 165 static int ifconf(u_long, caddr_t); 166 static void if_freemulti(struct ifmultiaddr *); 167 static void if_init(void *); 168 static void if_grow(void); 169 static void if_route(struct ifnet *, int flag, int fam); 170 static int if_setflag(struct ifnet *, int, int, int *, int); 171 static int if_transmit(struct ifnet *ifp, struct mbuf *m); 172 static void if_unroute(struct ifnet *, int flag, int fam); 173 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 174 static int if_rtdel(struct radix_node *, void *); 175 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *); 176 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int); 177 static void do_link_state_change(void *, int); 178 static int if_getgroup(struct ifgroupreq *, struct ifnet *); 179 static int if_getgroupmembers(struct ifgroupreq *); 180 static void if_delgroups(struct ifnet *); 181 static void if_attach_internal(struct ifnet *, int); 182 static void if_detach_internal(struct ifnet *, int); 183 184 #ifdef INET6 185 /* 186 * XXX: declare here to avoid to include many inet6 related files.. 187 * should be more generalized? 188 */ 189 extern void nd6_setmtu(struct ifnet *); 190 #endif 191 192 VNET_DEFINE(int, if_index); 193 int ifqmaxlen = IFQ_MAXLEN; 194 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */ 195 VNET_DEFINE(struct ifgrouphead, ifg_head); 196 197 static VNET_DEFINE(int, if_indexlim) = 8; 198 199 /* Table of ifnet by index. */ 200 VNET_DEFINE(struct ifindex_entry *, ifindex_table); 201 202 #define V_if_indexlim VNET(if_indexlim) 203 #define V_ifindex_table VNET(ifindex_table) 204 205 /* 206 * The global network interface list (V_ifnet) and related state (such as 207 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and 208 * an rwlock. Either may be acquired shared to stablize the list, but both 209 * must be acquired writable to modify the list. This model allows us to 210 * both stablize the interface list during interrupt thread processing, but 211 * also to stablize it over long-running ioctls, without introducing priority 212 * inversions and deadlocks. 213 */ 214 struct rwlock ifnet_rwlock; 215 struct sx ifnet_sxlock; 216 217 /* 218 * The allocation of network interfaces is a rather non-atomic affair; we 219 * need to select an index before we are ready to expose the interface for 220 * use, so will use this pointer value to indicate reservation. 221 */ 222 #define IFNET_HOLD (void *)(uintptr_t)(-1) 223 224 static if_com_alloc_t *if_com_alloc[256]; 225 static if_com_free_t *if_com_free[256]; 226 227 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals"); 228 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 229 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 230 231 struct ifnet * 232 ifnet_byindex_locked(u_short idx) 233 { 234 235 if (idx > V_if_index) 236 return (NULL); 237 if (V_ifindex_table[idx].ife_ifnet == IFNET_HOLD) 238 return (NULL); 239 return (V_ifindex_table[idx].ife_ifnet); 240 } 241 242 struct ifnet * 243 ifnet_byindex(u_short idx) 244 { 245 struct ifnet *ifp; 246 247 IFNET_RLOCK_NOSLEEP(); 248 ifp = ifnet_byindex_locked(idx); 249 IFNET_RUNLOCK_NOSLEEP(); 250 return (ifp); 251 } 252 253 struct ifnet * 254 ifnet_byindex_ref(u_short idx) 255 { 256 struct ifnet *ifp; 257 258 IFNET_RLOCK_NOSLEEP(); 259 ifp = ifnet_byindex_locked(idx); 260 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) { 261 IFNET_RUNLOCK_NOSLEEP(); 262 return (NULL); 263 } 264 if_ref(ifp); 265 IFNET_RUNLOCK_NOSLEEP(); 266 return (ifp); 267 } 268 269 /* 270 * Allocate an ifindex array entry; return 0 on success or an error on 271 * failure. 272 */ 273 static int 274 ifindex_alloc_locked(u_short *idxp) 275 { 276 u_short idx; 277 278 IFNET_WLOCK_ASSERT(); 279 280 retry: 281 /* 282 * Try to find an empty slot below V_if_index. If we fail, take the 283 * next slot. 284 */ 285 for (idx = 1; idx <= V_if_index; idx++) { 286 if (V_ifindex_table[idx].ife_ifnet == NULL) 287 break; 288 } 289 290 /* Catch if_index overflow. */ 291 if (idx >= V_if_indexlim) { 292 if_grow(); 293 goto retry; 294 } 295 if (idx > V_if_index) 296 V_if_index = idx; 297 *idxp = idx; 298 return (0); 299 } 300 301 static void 302 ifindex_free_locked(u_short idx) 303 { 304 305 IFNET_WLOCK_ASSERT(); 306 307 V_ifindex_table[idx].ife_ifnet = NULL; 308 while (V_if_index > 0 && 309 V_ifindex_table[V_if_index].ife_ifnet == NULL) 310 V_if_index--; 311 } 312 313 static void 314 ifindex_free(u_short idx) 315 { 316 317 IFNET_WLOCK(); 318 ifindex_free_locked(idx); 319 IFNET_WUNLOCK(); 320 } 321 322 static void 323 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp) 324 { 325 326 IFNET_WLOCK_ASSERT(); 327 328 V_ifindex_table[idx].ife_ifnet = ifp; 329 } 330 331 static void 332 ifnet_setbyindex(u_short idx, struct ifnet *ifp) 333 { 334 335 IFNET_WLOCK(); 336 ifnet_setbyindex_locked(idx, ifp); 337 IFNET_WUNLOCK(); 338 } 339 340 struct ifaddr * 341 ifaddr_byindex(u_short idx) 342 { 343 struct ifaddr *ifa; 344 345 IFNET_RLOCK_NOSLEEP(); 346 ifa = ifnet_byindex_locked(idx)->if_addr; 347 if (ifa != NULL) 348 ifa_ref(ifa); 349 IFNET_RUNLOCK_NOSLEEP(); 350 return (ifa); 351 } 352 353 /* 354 * Network interface utility routines. 355 * 356 * Routines with ifa_ifwith* names take sockaddr *'s as 357 * parameters. 358 */ 359 360 static void 361 vnet_if_init(const void *unused __unused) 362 { 363 364 TAILQ_INIT(&V_ifnet); 365 TAILQ_INIT(&V_ifg_head); 366 IFNET_WLOCK(); 367 if_grow(); /* create initial table */ 368 IFNET_WUNLOCK(); 369 vnet_if_clone_init(); 370 } 371 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init, 372 NULL); 373 374 /* ARGSUSED*/ 375 static void 376 if_init(void *dummy __unused) 377 { 378 379 IFNET_LOCK_INIT(); 380 if_clone_init(); 381 } 382 SYSINIT(interfaces, SI_SUB_INIT_IF, SI_ORDER_FIRST, if_init, NULL); 383 384 385 #ifdef VIMAGE 386 static void 387 vnet_if_uninit(const void *unused __unused) 388 { 389 390 VNET_ASSERT(TAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p " 391 "not empty", __func__, __LINE__, &V_ifnet)); 392 VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p " 393 "not empty", __func__, __LINE__, &V_ifg_head)); 394 395 free((caddr_t)V_ifindex_table, M_IFNET); 396 } 397 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST, 398 vnet_if_uninit, NULL); 399 #endif 400 401 static void 402 if_grow(void) 403 { 404 int oldlim; 405 u_int n; 406 struct ifindex_entry *e; 407 408 IFNET_WLOCK_ASSERT(); 409 oldlim = V_if_indexlim; 410 IFNET_WUNLOCK(); 411 n = (oldlim << 1) * sizeof(*e); 412 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO); 413 IFNET_WLOCK(); 414 if (V_if_indexlim != oldlim) { 415 free(e, M_IFNET); 416 return; 417 } 418 if (V_ifindex_table != NULL) { 419 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2); 420 free((caddr_t)V_ifindex_table, M_IFNET); 421 } 422 V_if_indexlim <<= 1; 423 V_ifindex_table = e; 424 } 425 426 /* 427 * Allocate a struct ifnet and an index for an interface. A layer 2 428 * common structure will also be allocated if an allocation routine is 429 * registered for the passed type. 430 */ 431 struct ifnet * 432 if_alloc(u_char type) 433 { 434 struct ifnet *ifp; 435 u_short idx; 436 437 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO); 438 IFNET_WLOCK(); 439 if (ifindex_alloc_locked(&idx) != 0) { 440 IFNET_WUNLOCK(); 441 free(ifp, M_IFNET); 442 return (NULL); 443 } 444 ifnet_setbyindex_locked(idx, IFNET_HOLD); 445 IFNET_WUNLOCK(); 446 ifp->if_index = idx; 447 ifp->if_type = type; 448 ifp->if_alloctype = type; 449 if (if_com_alloc[type] != NULL) { 450 ifp->if_l2com = if_com_alloc[type](type, ifp); 451 if (ifp->if_l2com == NULL) { 452 free(ifp, M_IFNET); 453 ifindex_free(idx); 454 return (NULL); 455 } 456 } 457 458 IF_ADDR_LOCK_INIT(ifp); 459 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp); 460 ifp->if_afdata_initialized = 0; 461 IF_AFDATA_LOCK_INIT(ifp); 462 TAILQ_INIT(&ifp->if_addrhead); 463 TAILQ_INIT(&ifp->if_multiaddrs); 464 TAILQ_INIT(&ifp->if_groups); 465 #ifdef MAC 466 mac_ifnet_init(ifp); 467 #endif 468 ifq_init(&ifp->if_snd, ifp); 469 470 refcount_init(&ifp->if_refcount, 1); /* Index reference. */ 471 ifnet_setbyindex(ifp->if_index, ifp); 472 return (ifp); 473 } 474 475 /* 476 * Do the actual work of freeing a struct ifnet, and layer 2 common 477 * structure. This call is made when the last reference to an 478 * interface is released. 479 */ 480 static void 481 if_free_internal(struct ifnet *ifp) 482 { 483 484 KASSERT((ifp->if_flags & IFF_DYING), 485 ("if_free_internal: interface not dying")); 486 487 if (if_com_free[ifp->if_alloctype] != NULL) 488 if_com_free[ifp->if_alloctype](ifp->if_l2com, 489 ifp->if_alloctype); 490 491 #ifdef MAC 492 mac_ifnet_destroy(ifp); 493 #endif /* MAC */ 494 if (ifp->if_description != NULL) 495 free(ifp->if_description, M_IFDESCR); 496 IF_AFDATA_DESTROY(ifp); 497 IF_ADDR_LOCK_DESTROY(ifp); 498 ifq_delete(&ifp->if_snd); 499 free(ifp, M_IFNET); 500 } 501 502 /* 503 * Deregister an interface and free the associated storage. 504 */ 505 void 506 if_free(struct ifnet *ifp) 507 { 508 509 ifp->if_flags |= IFF_DYING; /* XXX: Locking */ 510 511 CURVNET_SET_QUIET(ifp->if_vnet); 512 IFNET_WLOCK(); 513 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index), 514 ("%s: freeing unallocated ifnet", ifp->if_xname)); 515 516 ifindex_free_locked(ifp->if_index); 517 IFNET_WUNLOCK(); 518 519 if (refcount_release(&ifp->if_refcount)) 520 if_free_internal(ifp); 521 CURVNET_RESTORE(); 522 } 523 524 /* 525 * Interfaces to keep an ifnet type-stable despite the possibility of the 526 * driver calling if_free(). If there are additional references, we defer 527 * freeing the underlying data structure. 528 */ 529 void 530 if_ref(struct ifnet *ifp) 531 { 532 533 /* We don't assert the ifnet list lock here, but arguably should. */ 534 refcount_acquire(&ifp->if_refcount); 535 } 536 537 void 538 if_rele(struct ifnet *ifp) 539 { 540 541 if (!refcount_release(&ifp->if_refcount)) 542 return; 543 if_free_internal(ifp); 544 } 545 546 void 547 ifq_init(struct ifaltq *ifq, struct ifnet *ifp) 548 { 549 550 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF); 551 552 if (ifq->ifq_maxlen == 0) 553 ifq->ifq_maxlen = ifqmaxlen; 554 555 ifq->altq_type = 0; 556 ifq->altq_disc = NULL; 557 ifq->altq_flags &= ALTQF_CANTCHANGE; 558 ifq->altq_tbr = NULL; 559 ifq->altq_ifp = ifp; 560 } 561 562 void 563 ifq_delete(struct ifaltq *ifq) 564 { 565 mtx_destroy(&ifq->ifq_mtx); 566 } 567 568 /* 569 * Perform generic interface initalization tasks and attach the interface 570 * to the list of "active" interfaces. If vmove flag is set on entry 571 * to if_attach_internal(), perform only a limited subset of initialization 572 * tasks, given that we are moving from one vnet to another an ifnet which 573 * has already been fully initialized. 574 * 575 * XXX: 576 * - The decision to return void and thus require this function to 577 * succeed is questionable. 578 * - We should probably do more sanity checking. For instance we don't 579 * do anything to insure if_xname is unique or non-empty. 580 */ 581 void 582 if_attach(struct ifnet *ifp) 583 { 584 585 if_attach_internal(ifp, 0); 586 } 587 588 static void 589 if_attach_internal(struct ifnet *ifp, int vmove) 590 { 591 unsigned socksize, ifasize; 592 int namelen, masklen; 593 struct sockaddr_dl *sdl; 594 struct ifaddr *ifa; 595 596 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index)) 597 panic ("%s: BUG: if_attach called without if_alloc'd input()\n", 598 ifp->if_xname); 599 600 #ifdef VIMAGE 601 ifp->if_vnet = curvnet; 602 if (ifp->if_home_vnet == NULL) 603 ifp->if_home_vnet = curvnet; 604 #endif 605 606 if_addgroup(ifp, IFG_ALL); 607 608 getmicrotime(&ifp->if_lastchange); 609 ifp->if_data.ifi_epoch = time_uptime; 610 ifp->if_data.ifi_datalen = sizeof(struct if_data); 611 612 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) || 613 (ifp->if_transmit != NULL && ifp->if_qflush != NULL), 614 ("transmit and qflush must both either be set or both be NULL")); 615 if (ifp->if_transmit == NULL) { 616 ifp->if_transmit = if_transmit; 617 ifp->if_qflush = if_qflush; 618 } 619 620 if (!vmove) { 621 #ifdef MAC 622 mac_ifnet_create(ifp); 623 #endif 624 625 /* 626 * Create a Link Level name for this device. 627 */ 628 namelen = strlen(ifp->if_xname); 629 /* 630 * Always save enough space for any possiable name so we 631 * can do a rename in place later. 632 */ 633 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ; 634 socksize = masklen + ifp->if_addrlen; 635 if (socksize < sizeof(*sdl)) 636 socksize = sizeof(*sdl); 637 socksize = roundup2(socksize, sizeof(long)); 638 ifasize = sizeof(*ifa) + 2 * socksize; 639 ifa = ifa_alloc(ifasize, M_WAITOK); 640 sdl = (struct sockaddr_dl *)(ifa + 1); 641 sdl->sdl_len = socksize; 642 sdl->sdl_family = AF_LINK; 643 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 644 sdl->sdl_nlen = namelen; 645 sdl->sdl_index = ifp->if_index; 646 sdl->sdl_type = ifp->if_type; 647 ifp->if_addr = ifa; 648 ifa->ifa_ifp = ifp; 649 ifa->ifa_rtrequest = link_rtrequest; 650 ifa->ifa_addr = (struct sockaddr *)sdl; 651 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 652 ifa->ifa_netmask = (struct sockaddr *)sdl; 653 sdl->sdl_len = masklen; 654 while (namelen != 0) 655 sdl->sdl_data[--namelen] = 0xff; 656 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link); 657 /* Reliably crash if used uninitialized. */ 658 ifp->if_broadcastaddr = NULL; 659 660 #if defined(INET) || defined(INET6) 661 /* Initialize to max value. */ 662 if (ifp->if_hw_tsomax == 0) 663 ifp->if_hw_tsomax = min(IP_MAXPACKET, 32 * MCLBYTES - 664 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN)); 665 KASSERT(ifp->if_hw_tsomax <= IP_MAXPACKET && 666 ifp->if_hw_tsomax >= IP_MAXPACKET / 8, 667 ("%s: tsomax outside of range", __func__)); 668 #endif 669 } 670 #ifdef VIMAGE 671 else { 672 /* 673 * Update the interface index in the link layer address 674 * of the interface. 675 */ 676 for (ifa = ifp->if_addr; ifa != NULL; 677 ifa = TAILQ_NEXT(ifa, ifa_link)) { 678 if (ifa->ifa_addr->sa_family == AF_LINK) { 679 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 680 sdl->sdl_index = ifp->if_index; 681 } 682 } 683 } 684 #endif 685 686 IFNET_WLOCK(); 687 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link); 688 #ifdef VIMAGE 689 curvnet->vnet_ifcnt++; 690 #endif 691 IFNET_WUNLOCK(); 692 693 if (domain_init_status >= 2) 694 if_attachdomain1(ifp); 695 696 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 697 if (IS_DEFAULT_VNET(curvnet)) 698 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 699 700 /* Announce the interface. */ 701 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 702 } 703 704 static void 705 if_attachdomain(void *dummy) 706 { 707 struct ifnet *ifp; 708 709 TAILQ_FOREACH(ifp, &V_ifnet, if_link) 710 if_attachdomain1(ifp); 711 } 712 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND, 713 if_attachdomain, NULL); 714 715 static void 716 if_attachdomain1(struct ifnet *ifp) 717 { 718 struct domain *dp; 719 720 /* 721 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we 722 * cannot lock ifp->if_afdata initialization, entirely. 723 */ 724 if (IF_AFDATA_TRYLOCK(ifp) == 0) 725 return; 726 if (ifp->if_afdata_initialized >= domain_init_status) { 727 IF_AFDATA_UNLOCK(ifp); 728 log(LOG_WARNING, "%s called more than once on %s\n", 729 __func__, ifp->if_xname); 730 return; 731 } 732 ifp->if_afdata_initialized = domain_init_status; 733 IF_AFDATA_UNLOCK(ifp); 734 735 /* address family dependent data region */ 736 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 737 for (dp = domains; dp; dp = dp->dom_next) { 738 if (dp->dom_ifattach) 739 ifp->if_afdata[dp->dom_family] = 740 (*dp->dom_ifattach)(ifp); 741 } 742 } 743 744 /* 745 * Remove any unicast or broadcast network addresses from an interface. 746 */ 747 void 748 if_purgeaddrs(struct ifnet *ifp) 749 { 750 struct ifaddr *ifa, *next; 751 752 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) { 753 if (ifa->ifa_addr->sa_family == AF_LINK) 754 continue; 755 #ifdef INET 756 /* XXX: Ugly!! ad hoc just for INET */ 757 if (ifa->ifa_addr->sa_family == AF_INET) { 758 struct ifaliasreq ifr; 759 760 bzero(&ifr, sizeof(ifr)); 761 ifr.ifra_addr = *ifa->ifa_addr; 762 if (ifa->ifa_dstaddr) 763 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 764 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 765 NULL) == 0) 766 continue; 767 } 768 #endif /* INET */ 769 #ifdef INET6 770 if (ifa->ifa_addr->sa_family == AF_INET6) { 771 in6_purgeaddr(ifa); 772 /* ifp_addrhead is already updated */ 773 continue; 774 } 775 #endif /* INET6 */ 776 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 777 ifa_free(ifa); 778 } 779 } 780 781 /* 782 * Remove any multicast network addresses from an interface when an ifnet 783 * is going away. 784 */ 785 static void 786 if_purgemaddrs(struct ifnet *ifp) 787 { 788 struct ifmultiaddr *ifma; 789 struct ifmultiaddr *next; 790 791 IF_ADDR_WLOCK(ifp); 792 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 793 if_delmulti_locked(ifp, ifma, 1); 794 IF_ADDR_WUNLOCK(ifp); 795 } 796 797 /* 798 * Detach an interface, removing it from the list of "active" interfaces. 799 * If vmove flag is set on entry to if_detach_internal(), perform only a 800 * limited subset of cleanup tasks, given that we are moving an ifnet from 801 * one vnet to another, where it must be fully operational. 802 * 803 * XXXRW: There are some significant questions about event ordering, and 804 * how to prevent things from starting to use the interface during detach. 805 */ 806 void 807 if_detach(struct ifnet *ifp) 808 { 809 810 CURVNET_SET_QUIET(ifp->if_vnet); 811 if_detach_internal(ifp, 0); 812 CURVNET_RESTORE(); 813 } 814 815 static void 816 if_detach_internal(struct ifnet *ifp, int vmove) 817 { 818 struct ifaddr *ifa; 819 struct radix_node_head *rnh; 820 int i, j; 821 struct domain *dp; 822 struct ifnet *iter; 823 int found = 0; 824 825 IFNET_WLOCK(); 826 TAILQ_FOREACH(iter, &V_ifnet, if_link) 827 if (iter == ifp) { 828 TAILQ_REMOVE(&V_ifnet, ifp, if_link); 829 found = 1; 830 break; 831 } 832 #ifdef VIMAGE 833 if (found) 834 curvnet->vnet_ifcnt--; 835 #endif 836 IFNET_WUNLOCK(); 837 if (!found) { 838 if (vmove) 839 panic("%s: ifp=%p not on the ifnet tailq %p", 840 __func__, ifp, &V_ifnet); 841 else 842 return; /* XXX this should panic as well? */ 843 } 844 845 /* 846 * Remove/wait for pending events. 847 */ 848 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 849 850 /* 851 * Remove routes and flush queues. 852 */ 853 if_down(ifp); 854 #ifdef ALTQ 855 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 856 altq_disable(&ifp->if_snd); 857 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 858 altq_detach(&ifp->if_snd); 859 #endif 860 861 if_purgeaddrs(ifp); 862 863 #ifdef INET 864 in_ifdetach(ifp); 865 #endif 866 867 #ifdef INET6 868 /* 869 * Remove all IPv6 kernel structs related to ifp. This should be done 870 * before removing routing entries below, since IPv6 interface direct 871 * routes are expected to be removed by the IPv6-specific kernel API. 872 * Otherwise, the kernel will detect some inconsistency and bark it. 873 */ 874 in6_ifdetach(ifp); 875 #endif 876 if_purgemaddrs(ifp); 877 878 if (!vmove) { 879 /* 880 * Prevent further calls into the device driver via ifnet. 881 */ 882 if_dead(ifp); 883 884 /* 885 * Remove link ifaddr pointer and maybe decrement if_index. 886 * Clean up all addresses. 887 */ 888 ifp->if_addr = NULL; 889 890 /* We can now free link ifaddr. */ 891 if (!TAILQ_EMPTY(&ifp->if_addrhead)) { 892 ifa = TAILQ_FIRST(&ifp->if_addrhead); 893 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 894 ifa_free(ifa); 895 } 896 } 897 898 /* 899 * Delete all remaining routes using this interface 900 * Unfortuneatly the only way to do this is to slog through 901 * the entire routing table looking for routes which point 902 * to this interface...oh well... 903 */ 904 for (i = 1; i <= AF_MAX; i++) { 905 for (j = 0; j < rt_numfibs; j++) { 906 rnh = rt_tables_get_rnh(j, i); 907 if (rnh == NULL) 908 continue; 909 RADIX_NODE_HEAD_LOCK(rnh); 910 (void) rnh->rnh_walktree(rnh, if_rtdel, ifp); 911 RADIX_NODE_HEAD_UNLOCK(rnh); 912 } 913 } 914 915 /* Announce that the interface is gone. */ 916 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 917 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 918 if (IS_DEFAULT_VNET(curvnet)) 919 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 920 if_delgroups(ifp); 921 922 /* 923 * We cannot hold the lock over dom_ifdetach calls as they might 924 * sleep, for example trying to drain a callout, thus open up the 925 * theoretical race with re-attaching. 926 */ 927 IF_AFDATA_LOCK(ifp); 928 i = ifp->if_afdata_initialized; 929 ifp->if_afdata_initialized = 0; 930 IF_AFDATA_UNLOCK(ifp); 931 for (dp = domains; i > 0 && dp; dp = dp->dom_next) { 932 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 933 (*dp->dom_ifdetach)(ifp, 934 ifp->if_afdata[dp->dom_family]); 935 } 936 } 937 938 #ifdef VIMAGE 939 /* 940 * if_vmove() performs a limited version of if_detach() in current 941 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg. 942 * An attempt is made to shrink if_index in current vnet, find an 943 * unused if_index in target vnet and calls if_grow() if necessary, 944 * and finally find an unused if_xname for the target vnet. 945 */ 946 void 947 if_vmove(struct ifnet *ifp, struct vnet *new_vnet) 948 { 949 u_short idx; 950 951 /* 952 * Detach from current vnet, but preserve LLADDR info, do not 953 * mark as dead etc. so that the ifnet can be reattached later. 954 */ 955 if_detach_internal(ifp, 1); 956 957 /* 958 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink 959 * the if_index for that vnet if possible. 960 * 961 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized, 962 * or we'd lock on one vnet and unlock on another. 963 */ 964 IFNET_WLOCK(); 965 ifindex_free_locked(ifp->if_index); 966 IFNET_WUNLOCK(); 967 968 /* 969 * Perform interface-specific reassignment tasks, if provided by 970 * the driver. 971 */ 972 if (ifp->if_reassign != NULL) 973 ifp->if_reassign(ifp, new_vnet, NULL); 974 975 /* 976 * Switch to the context of the target vnet. 977 */ 978 CURVNET_SET_QUIET(new_vnet); 979 980 IFNET_WLOCK(); 981 if (ifindex_alloc_locked(&idx) != 0) { 982 IFNET_WUNLOCK(); 983 panic("if_index overflow"); 984 } 985 ifp->if_index = idx; 986 ifnet_setbyindex_locked(ifp->if_index, ifp); 987 IFNET_WUNLOCK(); 988 989 if_attach_internal(ifp, 1); 990 991 CURVNET_RESTORE(); 992 } 993 994 /* 995 * Move an ifnet to or from another child prison/vnet, specified by the jail id. 996 */ 997 static int 998 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid) 999 { 1000 struct prison *pr; 1001 struct ifnet *difp; 1002 1003 /* Try to find the prison within our visibility. */ 1004 sx_slock(&allprison_lock); 1005 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1006 sx_sunlock(&allprison_lock); 1007 if (pr == NULL) 1008 return (ENXIO); 1009 prison_hold_locked(pr); 1010 mtx_unlock(&pr->pr_mtx); 1011 1012 /* Do not try to move the iface from and to the same prison. */ 1013 if (pr->pr_vnet == ifp->if_vnet) { 1014 prison_free(pr); 1015 return (EEXIST); 1016 } 1017 1018 /* Make sure the named iface does not exists in the dst. prison/vnet. */ 1019 /* XXX Lock interfaces to avoid races. */ 1020 CURVNET_SET_QUIET(pr->pr_vnet); 1021 difp = ifunit(ifname); 1022 CURVNET_RESTORE(); 1023 if (difp != NULL) { 1024 prison_free(pr); 1025 return (EEXIST); 1026 } 1027 1028 /* Move the interface into the child jail/vnet. */ 1029 if_vmove(ifp, pr->pr_vnet); 1030 1031 /* Report the new if_xname back to the userland. */ 1032 sprintf(ifname, "%s", ifp->if_xname); 1033 1034 prison_free(pr); 1035 return (0); 1036 } 1037 1038 static int 1039 if_vmove_reclaim(struct thread *td, char *ifname, int jid) 1040 { 1041 struct prison *pr; 1042 struct vnet *vnet_dst; 1043 struct ifnet *ifp; 1044 1045 /* Try to find the prison within our visibility. */ 1046 sx_slock(&allprison_lock); 1047 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1048 sx_sunlock(&allprison_lock); 1049 if (pr == NULL) 1050 return (ENXIO); 1051 prison_hold_locked(pr); 1052 mtx_unlock(&pr->pr_mtx); 1053 1054 /* Make sure the named iface exists in the source prison/vnet. */ 1055 CURVNET_SET(pr->pr_vnet); 1056 ifp = ifunit(ifname); /* XXX Lock to avoid races. */ 1057 if (ifp == NULL) { 1058 CURVNET_RESTORE(); 1059 prison_free(pr); 1060 return (ENXIO); 1061 } 1062 1063 /* Do not try to move the iface from and to the same prison. */ 1064 vnet_dst = TD_TO_VNET(td); 1065 if (vnet_dst == ifp->if_vnet) { 1066 CURVNET_RESTORE(); 1067 prison_free(pr); 1068 return (EEXIST); 1069 } 1070 1071 /* Get interface back from child jail/vnet. */ 1072 if_vmove(ifp, vnet_dst); 1073 CURVNET_RESTORE(); 1074 1075 /* Report the new if_xname back to the userland. */ 1076 sprintf(ifname, "%s", ifp->if_xname); 1077 1078 prison_free(pr); 1079 return (0); 1080 } 1081 #endif /* VIMAGE */ 1082 1083 /* 1084 * Add a group to an interface 1085 */ 1086 int 1087 if_addgroup(struct ifnet *ifp, const char *groupname) 1088 { 1089 struct ifg_list *ifgl; 1090 struct ifg_group *ifg = NULL; 1091 struct ifg_member *ifgm; 1092 int new = 0; 1093 1094 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 1095 groupname[strlen(groupname) - 1] <= '9') 1096 return (EINVAL); 1097 1098 IFNET_WLOCK(); 1099 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1100 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) { 1101 IFNET_WUNLOCK(); 1102 return (EEXIST); 1103 } 1104 1105 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP, 1106 M_NOWAIT)) == NULL) { 1107 IFNET_WUNLOCK(); 1108 return (ENOMEM); 1109 } 1110 1111 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member), 1112 M_TEMP, M_NOWAIT)) == NULL) { 1113 free(ifgl, M_TEMP); 1114 IFNET_WUNLOCK(); 1115 return (ENOMEM); 1116 } 1117 1118 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1119 if (!strcmp(ifg->ifg_group, groupname)) 1120 break; 1121 1122 if (ifg == NULL) { 1123 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group), 1124 M_TEMP, M_NOWAIT)) == NULL) { 1125 free(ifgl, M_TEMP); 1126 free(ifgm, M_TEMP); 1127 IFNET_WUNLOCK(); 1128 return (ENOMEM); 1129 } 1130 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 1131 ifg->ifg_refcnt = 0; 1132 TAILQ_INIT(&ifg->ifg_members); 1133 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next); 1134 new = 1; 1135 } 1136 1137 ifg->ifg_refcnt++; 1138 ifgl->ifgl_group = ifg; 1139 ifgm->ifgm_ifp = ifp; 1140 1141 IF_ADDR_WLOCK(ifp); 1142 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 1143 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 1144 IF_ADDR_WUNLOCK(ifp); 1145 1146 IFNET_WUNLOCK(); 1147 1148 if (new) 1149 EVENTHANDLER_INVOKE(group_attach_event, ifg); 1150 EVENTHANDLER_INVOKE(group_change_event, groupname); 1151 1152 return (0); 1153 } 1154 1155 /* 1156 * Remove a group from an interface 1157 */ 1158 int 1159 if_delgroup(struct ifnet *ifp, const char *groupname) 1160 { 1161 struct ifg_list *ifgl; 1162 struct ifg_member *ifgm; 1163 1164 IFNET_WLOCK(); 1165 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1166 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1167 break; 1168 if (ifgl == NULL) { 1169 IFNET_WUNLOCK(); 1170 return (ENOENT); 1171 } 1172 1173 IF_ADDR_WLOCK(ifp); 1174 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1175 IF_ADDR_WUNLOCK(ifp); 1176 1177 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1178 if (ifgm->ifgm_ifp == ifp) 1179 break; 1180 1181 if (ifgm != NULL) { 1182 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 1183 free(ifgm, M_TEMP); 1184 } 1185 1186 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1187 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1188 IFNET_WUNLOCK(); 1189 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group); 1190 free(ifgl->ifgl_group, M_TEMP); 1191 } else 1192 IFNET_WUNLOCK(); 1193 1194 free(ifgl, M_TEMP); 1195 1196 EVENTHANDLER_INVOKE(group_change_event, groupname); 1197 1198 return (0); 1199 } 1200 1201 /* 1202 * Remove an interface from all groups 1203 */ 1204 static void 1205 if_delgroups(struct ifnet *ifp) 1206 { 1207 struct ifg_list *ifgl; 1208 struct ifg_member *ifgm; 1209 char groupname[IFNAMSIZ]; 1210 1211 IFNET_WLOCK(); 1212 while (!TAILQ_EMPTY(&ifp->if_groups)) { 1213 ifgl = TAILQ_FIRST(&ifp->if_groups); 1214 1215 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ); 1216 1217 IF_ADDR_WLOCK(ifp); 1218 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1219 IF_ADDR_WUNLOCK(ifp); 1220 1221 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1222 if (ifgm->ifgm_ifp == ifp) 1223 break; 1224 1225 if (ifgm != NULL) { 1226 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, 1227 ifgm_next); 1228 free(ifgm, M_TEMP); 1229 } 1230 1231 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1232 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1233 IFNET_WUNLOCK(); 1234 EVENTHANDLER_INVOKE(group_detach_event, 1235 ifgl->ifgl_group); 1236 free(ifgl->ifgl_group, M_TEMP); 1237 } else 1238 IFNET_WUNLOCK(); 1239 1240 free(ifgl, M_TEMP); 1241 1242 EVENTHANDLER_INVOKE(group_change_event, groupname); 1243 1244 IFNET_WLOCK(); 1245 } 1246 IFNET_WUNLOCK(); 1247 } 1248 1249 /* 1250 * Stores all groups from an interface in memory pointed 1251 * to by data 1252 */ 1253 static int 1254 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp) 1255 { 1256 int len, error; 1257 struct ifg_list *ifgl; 1258 struct ifg_req ifgrq, *ifgp; 1259 struct ifgroupreq *ifgr = data; 1260 1261 if (ifgr->ifgr_len == 0) { 1262 IF_ADDR_RLOCK(ifp); 1263 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1264 ifgr->ifgr_len += sizeof(struct ifg_req); 1265 IF_ADDR_RUNLOCK(ifp); 1266 return (0); 1267 } 1268 1269 len = ifgr->ifgr_len; 1270 ifgp = ifgr->ifgr_groups; 1271 /* XXX: wire */ 1272 IF_ADDR_RLOCK(ifp); 1273 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 1274 if (len < sizeof(ifgrq)) { 1275 IF_ADDR_RUNLOCK(ifp); 1276 return (EINVAL); 1277 } 1278 bzero(&ifgrq, sizeof ifgrq); 1279 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 1280 sizeof(ifgrq.ifgrq_group)); 1281 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1282 IF_ADDR_RUNLOCK(ifp); 1283 return (error); 1284 } 1285 len -= sizeof(ifgrq); 1286 ifgp++; 1287 } 1288 IF_ADDR_RUNLOCK(ifp); 1289 1290 return (0); 1291 } 1292 1293 /* 1294 * Stores all members of a group in memory pointed to by data 1295 */ 1296 static int 1297 if_getgroupmembers(struct ifgroupreq *data) 1298 { 1299 struct ifgroupreq *ifgr = data; 1300 struct ifg_group *ifg; 1301 struct ifg_member *ifgm; 1302 struct ifg_req ifgrq, *ifgp; 1303 int len, error; 1304 1305 IFNET_RLOCK(); 1306 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1307 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 1308 break; 1309 if (ifg == NULL) { 1310 IFNET_RUNLOCK(); 1311 return (ENOENT); 1312 } 1313 1314 if (ifgr->ifgr_len == 0) { 1315 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1316 ifgr->ifgr_len += sizeof(ifgrq); 1317 IFNET_RUNLOCK(); 1318 return (0); 1319 } 1320 1321 len = ifgr->ifgr_len; 1322 ifgp = ifgr->ifgr_groups; 1323 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1324 if (len < sizeof(ifgrq)) { 1325 IFNET_RUNLOCK(); 1326 return (EINVAL); 1327 } 1328 bzero(&ifgrq, sizeof ifgrq); 1329 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1330 sizeof(ifgrq.ifgrq_member)); 1331 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1332 IFNET_RUNLOCK(); 1333 return (error); 1334 } 1335 len -= sizeof(ifgrq); 1336 ifgp++; 1337 } 1338 IFNET_RUNLOCK(); 1339 1340 return (0); 1341 } 1342 1343 /* 1344 * Delete Routes for a Network Interface 1345 * 1346 * Called for each routing entry via the rnh->rnh_walktree() call above 1347 * to delete all route entries referencing a detaching network interface. 1348 * 1349 * Arguments: 1350 * rn pointer to node in the routing table 1351 * arg argument passed to rnh->rnh_walktree() - detaching interface 1352 * 1353 * Returns: 1354 * 0 successful 1355 * errno failed - reason indicated 1356 * 1357 */ 1358 static int 1359 if_rtdel(struct radix_node *rn, void *arg) 1360 { 1361 struct rtentry *rt = (struct rtentry *)rn; 1362 struct ifnet *ifp = arg; 1363 int err; 1364 1365 if (rt->rt_ifp == ifp) { 1366 1367 /* 1368 * Protect (sorta) against walktree recursion problems 1369 * with cloned routes 1370 */ 1371 if ((rt->rt_flags & RTF_UP) == 0) 1372 return (0); 1373 1374 err = rtrequest_fib(RTM_DELETE, rt_key(rt), rt->rt_gateway, 1375 rt_mask(rt), 1376 rt->rt_flags|RTF_RNH_LOCKED|RTF_PINNED, 1377 (struct rtentry **) NULL, rt->rt_fibnum); 1378 if (err) { 1379 log(LOG_WARNING, "if_rtdel: error %d\n", err); 1380 } 1381 } 1382 1383 return (0); 1384 } 1385 1386 /* 1387 * Wrapper functions for struct ifnet address list locking macros. These are 1388 * used by kernel modules to avoid encoding programming interface or binary 1389 * interface assumptions that may be violated when kernel-internal locking 1390 * approaches change. 1391 */ 1392 void 1393 if_addr_rlock(struct ifnet *ifp) 1394 { 1395 1396 IF_ADDR_RLOCK(ifp); 1397 } 1398 1399 void 1400 if_addr_runlock(struct ifnet *ifp) 1401 { 1402 1403 IF_ADDR_RUNLOCK(ifp); 1404 } 1405 1406 void 1407 if_maddr_rlock(if_t ifp) 1408 { 1409 1410 IF_ADDR_RLOCK((struct ifnet *)ifp); 1411 } 1412 1413 void 1414 if_maddr_runlock(if_t ifp) 1415 { 1416 1417 IF_ADDR_RUNLOCK((struct ifnet *)ifp); 1418 } 1419 1420 /* 1421 * Initialization, destruction and refcounting functions for ifaddrs. 1422 */ 1423 struct ifaddr * 1424 ifa_alloc(size_t size, int flags) 1425 { 1426 struct ifaddr *ifa; 1427 1428 KASSERT(size >= sizeof(struct ifaddr), 1429 ("%s: invalid size %zu", __func__, size)); 1430 1431 ifa = malloc(size, M_IFADDR, M_ZERO | flags); 1432 if (ifa == NULL) 1433 return (NULL); 1434 1435 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL) 1436 goto fail; 1437 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL) 1438 goto fail; 1439 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL) 1440 goto fail; 1441 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL) 1442 goto fail; 1443 1444 refcount_init(&ifa->ifa_refcnt, 1); 1445 1446 return (ifa); 1447 1448 fail: 1449 /* free(NULL) is okay */ 1450 counter_u64_free(ifa->ifa_opackets); 1451 counter_u64_free(ifa->ifa_ipackets); 1452 counter_u64_free(ifa->ifa_obytes); 1453 counter_u64_free(ifa->ifa_ibytes); 1454 free(ifa, M_IFADDR); 1455 1456 return (NULL); 1457 } 1458 1459 void 1460 ifa_ref(struct ifaddr *ifa) 1461 { 1462 1463 refcount_acquire(&ifa->ifa_refcnt); 1464 } 1465 1466 void 1467 ifa_free(struct ifaddr *ifa) 1468 { 1469 1470 if (refcount_release(&ifa->ifa_refcnt)) { 1471 counter_u64_free(ifa->ifa_opackets); 1472 counter_u64_free(ifa->ifa_ipackets); 1473 counter_u64_free(ifa->ifa_obytes); 1474 counter_u64_free(ifa->ifa_ibytes); 1475 free(ifa, M_IFADDR); 1476 } 1477 } 1478 1479 int 1480 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1481 { 1482 int error = 0; 1483 struct rtentry *rt = NULL; 1484 struct rt_addrinfo info; 1485 static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK}; 1486 1487 bzero(&info, sizeof(info)); 1488 info.rti_ifp = V_loif; 1489 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; 1490 info.rti_info[RTAX_DST] = ia; 1491 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1492 error = rtrequest1_fib(RTM_ADD, &info, &rt, ifa->ifa_ifp->if_fib); 1493 1494 if (error == 0 && rt != NULL) { 1495 RT_LOCK(rt); 1496 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type = 1497 ifa->ifa_ifp->if_type; 1498 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index = 1499 ifa->ifa_ifp->if_index; 1500 RT_REMREF(rt); 1501 RT_UNLOCK(rt); 1502 } else if (error != 0) 1503 log(LOG_DEBUG, "%s: insertion failed: %u\n", __func__, error); 1504 1505 return (error); 1506 } 1507 1508 int 1509 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1510 { 1511 int error = 0; 1512 struct rt_addrinfo info; 1513 struct sockaddr_dl null_sdl; 1514 1515 bzero(&null_sdl, sizeof(null_sdl)); 1516 null_sdl.sdl_len = sizeof(null_sdl); 1517 null_sdl.sdl_family = AF_LINK; 1518 null_sdl.sdl_type = ifa->ifa_ifp->if_type; 1519 null_sdl.sdl_index = ifa->ifa_ifp->if_index; 1520 bzero(&info, sizeof(info)); 1521 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; 1522 info.rti_info[RTAX_DST] = ia; 1523 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1524 error = rtrequest1_fib(RTM_DELETE, &info, NULL, ifa->ifa_ifp->if_fib); 1525 1526 if (error != 0) 1527 log(LOG_DEBUG, "%s: deletion failed: %u\n", __func__, error); 1528 1529 return (error); 1530 } 1531 1532 int 1533 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *sa, int fib) 1534 { 1535 struct rtentry *rt; 1536 1537 rt = rtalloc1_fib(sa, 0, 0, fib); 1538 if (rt == NULL) { 1539 log(LOG_DEBUG, "%s: fail", __func__); 1540 return (EHOSTUNREACH); 1541 } 1542 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type = 1543 ifa->ifa_ifp->if_type; 1544 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index = 1545 ifa->ifa_ifp->if_index; 1546 RTFREE_LOCKED(rt); 1547 1548 return (0); 1549 } 1550 1551 /* 1552 * XXX: Because sockaddr_dl has deeper structure than the sockaddr 1553 * structs used to represent other address families, it is necessary 1554 * to perform a different comparison. 1555 */ 1556 1557 #define sa_dl_equal(a1, a2) \ 1558 ((((struct sockaddr_dl *)(a1))->sdl_len == \ 1559 ((struct sockaddr_dl *)(a2))->sdl_len) && \ 1560 (bcmp(LLADDR((struct sockaddr_dl *)(a1)), \ 1561 LLADDR((struct sockaddr_dl *)(a2)), \ 1562 ((struct sockaddr_dl *)(a1))->sdl_alen) == 0)) 1563 1564 /* 1565 * Locate an interface based on a complete address. 1566 */ 1567 /*ARGSUSED*/ 1568 static struct ifaddr * 1569 ifa_ifwithaddr_internal(struct sockaddr *addr, int getref) 1570 { 1571 struct ifnet *ifp; 1572 struct ifaddr *ifa; 1573 1574 IFNET_RLOCK_NOSLEEP(); 1575 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1576 IF_ADDR_RLOCK(ifp); 1577 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1578 if (ifa->ifa_addr->sa_family != addr->sa_family) 1579 continue; 1580 if (sa_equal(addr, ifa->ifa_addr)) { 1581 if (getref) 1582 ifa_ref(ifa); 1583 IF_ADDR_RUNLOCK(ifp); 1584 goto done; 1585 } 1586 /* IP6 doesn't have broadcast */ 1587 if ((ifp->if_flags & IFF_BROADCAST) && 1588 ifa->ifa_broadaddr && 1589 ifa->ifa_broadaddr->sa_len != 0 && 1590 sa_equal(ifa->ifa_broadaddr, addr)) { 1591 if (getref) 1592 ifa_ref(ifa); 1593 IF_ADDR_RUNLOCK(ifp); 1594 goto done; 1595 } 1596 } 1597 IF_ADDR_RUNLOCK(ifp); 1598 } 1599 ifa = NULL; 1600 done: 1601 IFNET_RUNLOCK_NOSLEEP(); 1602 return (ifa); 1603 } 1604 1605 struct ifaddr * 1606 ifa_ifwithaddr(struct sockaddr *addr) 1607 { 1608 1609 return (ifa_ifwithaddr_internal(addr, 1)); 1610 } 1611 1612 int 1613 ifa_ifwithaddr_check(struct sockaddr *addr) 1614 { 1615 1616 return (ifa_ifwithaddr_internal(addr, 0) != NULL); 1617 } 1618 1619 /* 1620 * Locate an interface based on the broadcast address. 1621 */ 1622 /* ARGSUSED */ 1623 struct ifaddr * 1624 ifa_ifwithbroadaddr(struct sockaddr *addr) 1625 { 1626 struct ifnet *ifp; 1627 struct ifaddr *ifa; 1628 1629 IFNET_RLOCK_NOSLEEP(); 1630 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1631 IF_ADDR_RLOCK(ifp); 1632 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1633 if (ifa->ifa_addr->sa_family != addr->sa_family) 1634 continue; 1635 if ((ifp->if_flags & IFF_BROADCAST) && 1636 ifa->ifa_broadaddr && 1637 ifa->ifa_broadaddr->sa_len != 0 && 1638 sa_equal(ifa->ifa_broadaddr, addr)) { 1639 ifa_ref(ifa); 1640 IF_ADDR_RUNLOCK(ifp); 1641 goto done; 1642 } 1643 } 1644 IF_ADDR_RUNLOCK(ifp); 1645 } 1646 ifa = NULL; 1647 done: 1648 IFNET_RUNLOCK_NOSLEEP(); 1649 return (ifa); 1650 } 1651 1652 /* 1653 * Locate the point to point interface with a given destination address. 1654 */ 1655 /*ARGSUSED*/ 1656 struct ifaddr * 1657 ifa_ifwithdstaddr_fib(struct sockaddr *addr, int fibnum) 1658 { 1659 struct ifnet *ifp; 1660 struct ifaddr *ifa; 1661 1662 IFNET_RLOCK_NOSLEEP(); 1663 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1664 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1665 continue; 1666 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1667 continue; 1668 IF_ADDR_RLOCK(ifp); 1669 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1670 if (ifa->ifa_addr->sa_family != addr->sa_family) 1671 continue; 1672 if (ifa->ifa_dstaddr != NULL && 1673 sa_equal(addr, ifa->ifa_dstaddr)) { 1674 ifa_ref(ifa); 1675 IF_ADDR_RUNLOCK(ifp); 1676 goto done; 1677 } 1678 } 1679 IF_ADDR_RUNLOCK(ifp); 1680 } 1681 ifa = NULL; 1682 done: 1683 IFNET_RUNLOCK_NOSLEEP(); 1684 return (ifa); 1685 } 1686 1687 struct ifaddr * 1688 ifa_ifwithdstaddr(struct sockaddr *addr) 1689 { 1690 1691 return (ifa_ifwithdstaddr_fib(addr, RT_ALL_FIBS)); 1692 } 1693 1694 /* 1695 * Find an interface on a specific network. If many, choice 1696 * is most specific found. 1697 */ 1698 struct ifaddr * 1699 ifa_ifwithnet_fib(struct sockaddr *addr, int ignore_ptp, int fibnum) 1700 { 1701 struct ifnet *ifp; 1702 struct ifaddr *ifa; 1703 struct ifaddr *ifa_maybe = NULL; 1704 u_int af = addr->sa_family; 1705 char *addr_data = addr->sa_data, *cplim; 1706 1707 /* 1708 * AF_LINK addresses can be looked up directly by their index number, 1709 * so do that if we can. 1710 */ 1711 if (af == AF_LINK) { 1712 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; 1713 if (sdl->sdl_index && sdl->sdl_index <= V_if_index) 1714 return (ifaddr_byindex(sdl->sdl_index)); 1715 } 1716 1717 /* 1718 * Scan though each interface, looking for ones that have addresses 1719 * in this address family and the requested fib. Maintain a reference 1720 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that 1721 * kept it stable when we move onto the next interface. 1722 */ 1723 IFNET_RLOCK_NOSLEEP(); 1724 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1725 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1726 continue; 1727 IF_ADDR_RLOCK(ifp); 1728 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1729 char *cp, *cp2, *cp3; 1730 1731 if (ifa->ifa_addr->sa_family != af) 1732 next: continue; 1733 if (af == AF_INET && 1734 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) { 1735 /* 1736 * This is a bit broken as it doesn't 1737 * take into account that the remote end may 1738 * be a single node in the network we are 1739 * looking for. 1740 * The trouble is that we don't know the 1741 * netmask for the remote end. 1742 */ 1743 if (ifa->ifa_dstaddr != NULL && 1744 sa_equal(addr, ifa->ifa_dstaddr)) { 1745 ifa_ref(ifa); 1746 IF_ADDR_RUNLOCK(ifp); 1747 goto done; 1748 } 1749 } else { 1750 /* 1751 * if we have a special address handler, 1752 * then use it instead of the generic one. 1753 */ 1754 if (ifa->ifa_claim_addr) { 1755 if ((*ifa->ifa_claim_addr)(ifa, addr)) { 1756 ifa_ref(ifa); 1757 IF_ADDR_RUNLOCK(ifp); 1758 goto done; 1759 } 1760 continue; 1761 } 1762 1763 /* 1764 * Scan all the bits in the ifa's address. 1765 * If a bit dissagrees with what we are 1766 * looking for, mask it with the netmask 1767 * to see if it really matters. 1768 * (A byte at a time) 1769 */ 1770 if (ifa->ifa_netmask == 0) 1771 continue; 1772 cp = addr_data; 1773 cp2 = ifa->ifa_addr->sa_data; 1774 cp3 = ifa->ifa_netmask->sa_data; 1775 cplim = ifa->ifa_netmask->sa_len 1776 + (char *)ifa->ifa_netmask; 1777 while (cp3 < cplim) 1778 if ((*cp++ ^ *cp2++) & *cp3++) 1779 goto next; /* next address! */ 1780 /* 1781 * If the netmask of what we just found 1782 * is more specific than what we had before 1783 * (if we had one), or if the virtual status 1784 * of new prefix is better than of the old one, 1785 * then remember the new one before continuing 1786 * to search for an even better one. 1787 */ 1788 if (ifa_maybe == NULL || 1789 ifa_preferred(ifa_maybe, ifa) || 1790 rn_refines((caddr_t)ifa->ifa_netmask, 1791 (caddr_t)ifa_maybe->ifa_netmask)) { 1792 if (ifa_maybe != NULL) 1793 ifa_free(ifa_maybe); 1794 ifa_maybe = ifa; 1795 ifa_ref(ifa_maybe); 1796 } 1797 } 1798 } 1799 IF_ADDR_RUNLOCK(ifp); 1800 } 1801 ifa = ifa_maybe; 1802 ifa_maybe = NULL; 1803 done: 1804 IFNET_RUNLOCK_NOSLEEP(); 1805 if (ifa_maybe != NULL) 1806 ifa_free(ifa_maybe); 1807 return (ifa); 1808 } 1809 1810 struct ifaddr * 1811 ifa_ifwithnet(struct sockaddr *addr, int ignore_ptp) 1812 { 1813 1814 return (ifa_ifwithnet_fib(addr, ignore_ptp, RT_ALL_FIBS)); 1815 } 1816 1817 /* 1818 * Find an interface address specific to an interface best matching 1819 * a given address. 1820 */ 1821 struct ifaddr * 1822 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp) 1823 { 1824 struct ifaddr *ifa; 1825 char *cp, *cp2, *cp3; 1826 char *cplim; 1827 struct ifaddr *ifa_maybe = NULL; 1828 u_int af = addr->sa_family; 1829 1830 if (af >= AF_MAX) 1831 return (NULL); 1832 IF_ADDR_RLOCK(ifp); 1833 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1834 if (ifa->ifa_addr->sa_family != af) 1835 continue; 1836 if (ifa_maybe == NULL) 1837 ifa_maybe = ifa; 1838 if (ifa->ifa_netmask == 0) { 1839 if (sa_equal(addr, ifa->ifa_addr) || 1840 (ifa->ifa_dstaddr && 1841 sa_equal(addr, ifa->ifa_dstaddr))) 1842 goto done; 1843 continue; 1844 } 1845 if (ifp->if_flags & IFF_POINTOPOINT) { 1846 if (sa_equal(addr, ifa->ifa_dstaddr)) 1847 goto done; 1848 } else { 1849 cp = addr->sa_data; 1850 cp2 = ifa->ifa_addr->sa_data; 1851 cp3 = ifa->ifa_netmask->sa_data; 1852 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1853 for (; cp3 < cplim; cp3++) 1854 if ((*cp++ ^ *cp2++) & *cp3) 1855 break; 1856 if (cp3 == cplim) 1857 goto done; 1858 } 1859 } 1860 ifa = ifa_maybe; 1861 done: 1862 if (ifa != NULL) 1863 ifa_ref(ifa); 1864 IF_ADDR_RUNLOCK(ifp); 1865 return (ifa); 1866 } 1867 1868 /* 1869 * See whether new ifa is better than current one: 1870 * 1) A non-virtual one is preferred over virtual. 1871 * 2) A virtual in master state preferred over any other state. 1872 * 1873 * Used in several address selecting functions. 1874 */ 1875 int 1876 ifa_preferred(struct ifaddr *cur, struct ifaddr *next) 1877 { 1878 1879 return (cur->ifa_carp && (!next->ifa_carp || 1880 ((*carp_master_p)(next) && !(*carp_master_p)(cur)))); 1881 } 1882 1883 #include <net/if_llatbl.h> 1884 1885 /* 1886 * Default action when installing a route with a Link Level gateway. 1887 * Lookup an appropriate real ifa to point to. 1888 * This should be moved to /sys/net/link.c eventually. 1889 */ 1890 static void 1891 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 1892 { 1893 struct ifaddr *ifa, *oifa; 1894 struct sockaddr *dst; 1895 struct ifnet *ifp; 1896 1897 RT_LOCK_ASSERT(rt); 1898 1899 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) || 1900 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0)) 1901 return; 1902 ifa = ifaof_ifpforaddr(dst, ifp); 1903 if (ifa) { 1904 oifa = rt->rt_ifa; 1905 rt->rt_ifa = ifa; 1906 ifa_free(oifa); 1907 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1908 ifa->ifa_rtrequest(cmd, rt, info); 1909 } 1910 } 1911 1912 struct sockaddr_dl * 1913 link_alloc_sdl(size_t size, int flags) 1914 { 1915 1916 return (malloc(size, M_TEMP, flags)); 1917 } 1918 1919 void 1920 link_free_sdl(struct sockaddr *sa) 1921 { 1922 free(sa, M_TEMP); 1923 } 1924 1925 /* 1926 * Fills in given sdl with interface basic info. 1927 * Returns pointer to filled sdl. 1928 */ 1929 struct sockaddr_dl * 1930 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype) 1931 { 1932 struct sockaddr_dl *sdl; 1933 1934 sdl = (struct sockaddr_dl *)paddr; 1935 memset(sdl, 0, sizeof(struct sockaddr_dl)); 1936 sdl->sdl_len = sizeof(struct sockaddr_dl); 1937 sdl->sdl_family = AF_LINK; 1938 sdl->sdl_index = ifp->if_index; 1939 sdl->sdl_type = iftype; 1940 1941 return (sdl); 1942 } 1943 1944 /* 1945 * Mark an interface down and notify protocols of 1946 * the transition. 1947 */ 1948 static void 1949 if_unroute(struct ifnet *ifp, int flag, int fam) 1950 { 1951 struct ifaddr *ifa; 1952 1953 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP")); 1954 1955 ifp->if_flags &= ~flag; 1956 getmicrotime(&ifp->if_lastchange); 1957 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 1958 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1959 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1960 ifp->if_qflush(ifp); 1961 1962 if (ifp->if_carp) 1963 (*carp_linkstate_p)(ifp); 1964 rt_ifmsg(ifp); 1965 } 1966 1967 /* 1968 * Mark an interface up and notify protocols of 1969 * the transition. 1970 */ 1971 static void 1972 if_route(struct ifnet *ifp, int flag, int fam) 1973 { 1974 struct ifaddr *ifa; 1975 1976 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP")); 1977 1978 ifp->if_flags |= flag; 1979 getmicrotime(&ifp->if_lastchange); 1980 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 1981 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1982 pfctlinput(PRC_IFUP, ifa->ifa_addr); 1983 if (ifp->if_carp) 1984 (*carp_linkstate_p)(ifp); 1985 rt_ifmsg(ifp); 1986 #ifdef INET6 1987 in6_if_up(ifp); 1988 #endif 1989 } 1990 1991 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */ 1992 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */ 1993 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *); 1994 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t); 1995 int (*vlan_tag_p)(struct ifnet *, uint16_t *); 1996 int (*vlan_setcookie_p)(struct ifnet *, void *); 1997 void *(*vlan_cookie_p)(struct ifnet *); 1998 1999 /* 2000 * Handle a change in the interface link state. To avoid LORs 2001 * between driver lock and upper layer locks, as well as possible 2002 * recursions, we post event to taskqueue, and all job 2003 * is done in static do_link_state_change(). 2004 */ 2005 void 2006 if_link_state_change(struct ifnet *ifp, int link_state) 2007 { 2008 /* Return if state hasn't changed. */ 2009 if (ifp->if_link_state == link_state) 2010 return; 2011 2012 ifp->if_link_state = link_state; 2013 2014 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask); 2015 } 2016 2017 static void 2018 do_link_state_change(void *arg, int pending) 2019 { 2020 struct ifnet *ifp = (struct ifnet *)arg; 2021 int link_state = ifp->if_link_state; 2022 CURVNET_SET(ifp->if_vnet); 2023 2024 /* Notify that the link state has changed. */ 2025 rt_ifmsg(ifp); 2026 if (ifp->if_vlantrunk != NULL) 2027 (*vlan_link_state_p)(ifp); 2028 2029 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) && 2030 IFP2AC(ifp)->ac_netgraph != NULL) 2031 (*ng_ether_link_state_p)(ifp, link_state); 2032 if (ifp->if_carp) 2033 (*carp_linkstate_p)(ifp); 2034 if (ifp->if_bridge) 2035 (*bridge_linkstate_p)(ifp); 2036 if (ifp->if_lagg) 2037 (*lagg_linkstate_p)(ifp, link_state); 2038 2039 if (IS_DEFAULT_VNET(curvnet)) 2040 devctl_notify("IFNET", ifp->if_xname, 2041 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", 2042 NULL); 2043 if (pending > 1) 2044 if_printf(ifp, "%d link states coalesced\n", pending); 2045 if (log_link_state_change) 2046 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname, 2047 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" ); 2048 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, ifp->if_link_state); 2049 CURVNET_RESTORE(); 2050 } 2051 2052 /* 2053 * Mark an interface down and notify protocols of 2054 * the transition. 2055 */ 2056 void 2057 if_down(struct ifnet *ifp) 2058 { 2059 2060 if_unroute(ifp, IFF_UP, AF_UNSPEC); 2061 } 2062 2063 /* 2064 * Mark an interface up and notify protocols of 2065 * the transition. 2066 */ 2067 void 2068 if_up(struct ifnet *ifp) 2069 { 2070 2071 if_route(ifp, IFF_UP, AF_UNSPEC); 2072 } 2073 2074 /* 2075 * Flush an interface queue. 2076 */ 2077 void 2078 if_qflush(struct ifnet *ifp) 2079 { 2080 struct mbuf *m, *n; 2081 struct ifaltq *ifq; 2082 2083 ifq = &ifp->if_snd; 2084 IFQ_LOCK(ifq); 2085 #ifdef ALTQ 2086 if (ALTQ_IS_ENABLED(ifq)) 2087 ALTQ_PURGE(ifq); 2088 #endif 2089 n = ifq->ifq_head; 2090 while ((m = n) != 0) { 2091 n = m->m_act; 2092 m_freem(m); 2093 } 2094 ifq->ifq_head = 0; 2095 ifq->ifq_tail = 0; 2096 ifq->ifq_len = 0; 2097 IFQ_UNLOCK(ifq); 2098 } 2099 2100 /* 2101 * Map interface name to interface structure pointer, with or without 2102 * returning a reference. 2103 */ 2104 struct ifnet * 2105 ifunit_ref(const char *name) 2106 { 2107 struct ifnet *ifp; 2108 2109 IFNET_RLOCK_NOSLEEP(); 2110 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2111 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 && 2112 !(ifp->if_flags & IFF_DYING)) 2113 break; 2114 } 2115 if (ifp != NULL) 2116 if_ref(ifp); 2117 IFNET_RUNLOCK_NOSLEEP(); 2118 return (ifp); 2119 } 2120 2121 struct ifnet * 2122 ifunit(const char *name) 2123 { 2124 struct ifnet *ifp; 2125 2126 IFNET_RLOCK_NOSLEEP(); 2127 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2128 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0) 2129 break; 2130 } 2131 IFNET_RUNLOCK_NOSLEEP(); 2132 return (ifp); 2133 } 2134 2135 /* 2136 * Hardware specific interface ioctls. 2137 */ 2138 static int 2139 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td) 2140 { 2141 struct ifreq *ifr; 2142 int error = 0; 2143 int new_flags, temp_flags; 2144 size_t namelen, onamelen; 2145 size_t descrlen; 2146 char *descrbuf, *odescrbuf; 2147 char new_name[IFNAMSIZ]; 2148 struct ifaddr *ifa; 2149 struct sockaddr_dl *sdl; 2150 2151 ifr = (struct ifreq *)data; 2152 switch (cmd) { 2153 case SIOCGIFINDEX: 2154 ifr->ifr_index = ifp->if_index; 2155 break; 2156 2157 case SIOCGIFFLAGS: 2158 temp_flags = ifp->if_flags | ifp->if_drv_flags; 2159 ifr->ifr_flags = temp_flags & 0xffff; 2160 ifr->ifr_flagshigh = temp_flags >> 16; 2161 break; 2162 2163 case SIOCGIFCAP: 2164 ifr->ifr_reqcap = ifp->if_capabilities; 2165 ifr->ifr_curcap = ifp->if_capenable; 2166 break; 2167 2168 #ifdef MAC 2169 case SIOCGIFMAC: 2170 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp); 2171 break; 2172 #endif 2173 2174 case SIOCGIFMETRIC: 2175 ifr->ifr_metric = ifp->if_metric; 2176 break; 2177 2178 case SIOCGIFMTU: 2179 ifr->ifr_mtu = ifp->if_mtu; 2180 break; 2181 2182 case SIOCGIFPHYS: 2183 ifr->ifr_phys = ifp->if_physical; 2184 break; 2185 2186 case SIOCGIFDESCR: 2187 error = 0; 2188 sx_slock(&ifdescr_sx); 2189 if (ifp->if_description == NULL) 2190 error = ENOMSG; 2191 else { 2192 /* space for terminating nul */ 2193 descrlen = strlen(ifp->if_description) + 1; 2194 if (ifr->ifr_buffer.length < descrlen) 2195 ifr->ifr_buffer.buffer = NULL; 2196 else 2197 error = copyout(ifp->if_description, 2198 ifr->ifr_buffer.buffer, descrlen); 2199 ifr->ifr_buffer.length = descrlen; 2200 } 2201 sx_sunlock(&ifdescr_sx); 2202 break; 2203 2204 case SIOCSIFDESCR: 2205 error = priv_check(td, PRIV_NET_SETIFDESCR); 2206 if (error) 2207 return (error); 2208 2209 /* 2210 * Copy only (length-1) bytes to make sure that 2211 * if_description is always nul terminated. The 2212 * length parameter is supposed to count the 2213 * terminating nul in. 2214 */ 2215 if (ifr->ifr_buffer.length > ifdescr_maxlen) 2216 return (ENAMETOOLONG); 2217 else if (ifr->ifr_buffer.length == 0) 2218 descrbuf = NULL; 2219 else { 2220 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR, 2221 M_WAITOK | M_ZERO); 2222 error = copyin(ifr->ifr_buffer.buffer, descrbuf, 2223 ifr->ifr_buffer.length - 1); 2224 if (error) { 2225 free(descrbuf, M_IFDESCR); 2226 break; 2227 } 2228 } 2229 2230 sx_xlock(&ifdescr_sx); 2231 odescrbuf = ifp->if_description; 2232 ifp->if_description = descrbuf; 2233 sx_xunlock(&ifdescr_sx); 2234 2235 getmicrotime(&ifp->if_lastchange); 2236 free(odescrbuf, M_IFDESCR); 2237 break; 2238 2239 case SIOCGIFFIB: 2240 ifr->ifr_fib = ifp->if_fib; 2241 break; 2242 2243 case SIOCSIFFIB: 2244 error = priv_check(td, PRIV_NET_SETIFFIB); 2245 if (error) 2246 return (error); 2247 if (ifr->ifr_fib >= rt_numfibs) 2248 return (EINVAL); 2249 2250 ifp->if_fib = ifr->ifr_fib; 2251 break; 2252 2253 case SIOCSIFFLAGS: 2254 error = priv_check(td, PRIV_NET_SETIFFLAGS); 2255 if (error) 2256 return (error); 2257 /* 2258 * Currently, no driver owned flags pass the IFF_CANTCHANGE 2259 * check, so we don't need special handling here yet. 2260 */ 2261 new_flags = (ifr->ifr_flags & 0xffff) | 2262 (ifr->ifr_flagshigh << 16); 2263 if (ifp->if_flags & IFF_UP && 2264 (new_flags & IFF_UP) == 0) { 2265 if_down(ifp); 2266 } else if (new_flags & IFF_UP && 2267 (ifp->if_flags & IFF_UP) == 0) { 2268 if_up(ifp); 2269 } 2270 /* See if permanently promiscuous mode bit is about to flip */ 2271 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) { 2272 if (new_flags & IFF_PPROMISC) 2273 ifp->if_flags |= IFF_PROMISC; 2274 else if (ifp->if_pcount == 0) 2275 ifp->if_flags &= ~IFF_PROMISC; 2276 log(LOG_INFO, "%s: permanently promiscuous mode %s\n", 2277 ifp->if_xname, 2278 (new_flags & IFF_PPROMISC) ? "enabled" : "disabled"); 2279 } 2280 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 2281 (new_flags &~ IFF_CANTCHANGE); 2282 if (ifp->if_ioctl) { 2283 (void) (*ifp->if_ioctl)(ifp, cmd, data); 2284 } 2285 getmicrotime(&ifp->if_lastchange); 2286 break; 2287 2288 case SIOCSIFCAP: 2289 error = priv_check(td, PRIV_NET_SETIFCAP); 2290 if (error) 2291 return (error); 2292 if (ifp->if_ioctl == NULL) 2293 return (EOPNOTSUPP); 2294 if (ifr->ifr_reqcap & ~ifp->if_capabilities) 2295 return (EINVAL); 2296 error = (*ifp->if_ioctl)(ifp, cmd, data); 2297 if (error == 0) 2298 getmicrotime(&ifp->if_lastchange); 2299 break; 2300 2301 #ifdef MAC 2302 case SIOCSIFMAC: 2303 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp); 2304 break; 2305 #endif 2306 2307 case SIOCSIFNAME: 2308 error = priv_check(td, PRIV_NET_SETIFNAME); 2309 if (error) 2310 return (error); 2311 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 2312 if (error != 0) 2313 return (error); 2314 if (new_name[0] == '\0') 2315 return (EINVAL); 2316 if (ifunit(new_name) != NULL) 2317 return (EEXIST); 2318 2319 /* 2320 * XXX: Locking. Nothing else seems to lock if_flags, 2321 * and there are numerous other races with the 2322 * ifunit() checks not being atomic with namespace 2323 * changes (renames, vmoves, if_attach, etc). 2324 */ 2325 ifp->if_flags |= IFF_RENAMING; 2326 2327 /* Announce the departure of the interface. */ 2328 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 2329 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 2330 2331 log(LOG_INFO, "%s: changing name to '%s'\n", 2332 ifp->if_xname, new_name); 2333 2334 IF_ADDR_WLOCK(ifp); 2335 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 2336 ifa = ifp->if_addr; 2337 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 2338 namelen = strlen(new_name); 2339 onamelen = sdl->sdl_nlen; 2340 /* 2341 * Move the address if needed. This is safe because we 2342 * allocate space for a name of length IFNAMSIZ when we 2343 * create this in if_attach(). 2344 */ 2345 if (namelen != onamelen) { 2346 bcopy(sdl->sdl_data + onamelen, 2347 sdl->sdl_data + namelen, sdl->sdl_alen); 2348 } 2349 bcopy(new_name, sdl->sdl_data, namelen); 2350 sdl->sdl_nlen = namelen; 2351 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 2352 bzero(sdl->sdl_data, onamelen); 2353 while (namelen != 0) 2354 sdl->sdl_data[--namelen] = 0xff; 2355 IF_ADDR_WUNLOCK(ifp); 2356 2357 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 2358 /* Announce the return of the interface. */ 2359 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 2360 2361 ifp->if_flags &= ~IFF_RENAMING; 2362 break; 2363 2364 #ifdef VIMAGE 2365 case SIOCSIFVNET: 2366 error = priv_check(td, PRIV_NET_SETIFVNET); 2367 if (error) 2368 return (error); 2369 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid); 2370 break; 2371 #endif 2372 2373 case SIOCSIFMETRIC: 2374 error = priv_check(td, PRIV_NET_SETIFMETRIC); 2375 if (error) 2376 return (error); 2377 ifp->if_metric = ifr->ifr_metric; 2378 getmicrotime(&ifp->if_lastchange); 2379 break; 2380 2381 case SIOCSIFPHYS: 2382 error = priv_check(td, PRIV_NET_SETIFPHYS); 2383 if (error) 2384 return (error); 2385 if (ifp->if_ioctl == NULL) 2386 return (EOPNOTSUPP); 2387 error = (*ifp->if_ioctl)(ifp, cmd, data); 2388 if (error == 0) 2389 getmicrotime(&ifp->if_lastchange); 2390 break; 2391 2392 case SIOCSIFMTU: 2393 { 2394 u_long oldmtu = ifp->if_mtu; 2395 2396 error = priv_check(td, PRIV_NET_SETIFMTU); 2397 if (error) 2398 return (error); 2399 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) 2400 return (EINVAL); 2401 if (ifp->if_ioctl == NULL) 2402 return (EOPNOTSUPP); 2403 error = (*ifp->if_ioctl)(ifp, cmd, data); 2404 if (error == 0) { 2405 getmicrotime(&ifp->if_lastchange); 2406 rt_ifmsg(ifp); 2407 } 2408 /* 2409 * If the link MTU changed, do network layer specific procedure. 2410 */ 2411 if (ifp->if_mtu != oldmtu) { 2412 #ifdef INET6 2413 nd6_setmtu(ifp); 2414 #endif 2415 } 2416 break; 2417 } 2418 2419 case SIOCADDMULTI: 2420 case SIOCDELMULTI: 2421 if (cmd == SIOCADDMULTI) 2422 error = priv_check(td, PRIV_NET_ADDMULTI); 2423 else 2424 error = priv_check(td, PRIV_NET_DELMULTI); 2425 if (error) 2426 return (error); 2427 2428 /* Don't allow group membership on non-multicast interfaces. */ 2429 if ((ifp->if_flags & IFF_MULTICAST) == 0) 2430 return (EOPNOTSUPP); 2431 2432 /* Don't let users screw up protocols' entries. */ 2433 if (ifr->ifr_addr.sa_family != AF_LINK) 2434 return (EINVAL); 2435 2436 if (cmd == SIOCADDMULTI) { 2437 struct ifmultiaddr *ifma; 2438 2439 /* 2440 * Userland is only permitted to join groups once 2441 * via the if_addmulti() KPI, because it cannot hold 2442 * struct ifmultiaddr * between calls. It may also 2443 * lose a race while we check if the membership 2444 * already exists. 2445 */ 2446 IF_ADDR_RLOCK(ifp); 2447 ifma = if_findmulti(ifp, &ifr->ifr_addr); 2448 IF_ADDR_RUNLOCK(ifp); 2449 if (ifma != NULL) 2450 error = EADDRINUSE; 2451 else 2452 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 2453 } else { 2454 error = if_delmulti(ifp, &ifr->ifr_addr); 2455 } 2456 if (error == 0) 2457 getmicrotime(&ifp->if_lastchange); 2458 break; 2459 2460 case SIOCSIFPHYADDR: 2461 case SIOCDIFPHYADDR: 2462 #ifdef INET6 2463 case SIOCSIFPHYADDR_IN6: 2464 #endif 2465 case SIOCSIFMEDIA: 2466 case SIOCSIFGENERIC: 2467 error = priv_check(td, PRIV_NET_HWIOCTL); 2468 if (error) 2469 return (error); 2470 if (ifp->if_ioctl == NULL) 2471 return (EOPNOTSUPP); 2472 error = (*ifp->if_ioctl)(ifp, cmd, data); 2473 if (error == 0) 2474 getmicrotime(&ifp->if_lastchange); 2475 break; 2476 2477 case SIOCGIFSTATUS: 2478 case SIOCGIFPSRCADDR: 2479 case SIOCGIFPDSTADDR: 2480 case SIOCGIFMEDIA: 2481 case SIOCGIFGENERIC: 2482 if (ifp->if_ioctl == NULL) 2483 return (EOPNOTSUPP); 2484 error = (*ifp->if_ioctl)(ifp, cmd, data); 2485 break; 2486 2487 case SIOCSIFLLADDR: 2488 error = priv_check(td, PRIV_NET_SETLLADDR); 2489 if (error) 2490 return (error); 2491 error = if_setlladdr(ifp, 2492 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); 2493 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 2494 break; 2495 2496 case SIOCAIFGROUP: 2497 { 2498 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2499 2500 error = priv_check(td, PRIV_NET_ADDIFGROUP); 2501 if (error) 2502 return (error); 2503 if ((error = if_addgroup(ifp, ifgr->ifgr_group))) 2504 return (error); 2505 break; 2506 } 2507 2508 case SIOCGIFGROUP: 2509 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp))) 2510 return (error); 2511 break; 2512 2513 case SIOCDIFGROUP: 2514 { 2515 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2516 2517 error = priv_check(td, PRIV_NET_DELIFGROUP); 2518 if (error) 2519 return (error); 2520 if ((error = if_delgroup(ifp, ifgr->ifgr_group))) 2521 return (error); 2522 break; 2523 } 2524 2525 default: 2526 error = ENOIOCTL; 2527 break; 2528 } 2529 return (error); 2530 } 2531 2532 #ifdef COMPAT_FREEBSD32 2533 struct ifconf32 { 2534 int32_t ifc_len; 2535 union { 2536 uint32_t ifcu_buf; 2537 uint32_t ifcu_req; 2538 } ifc_ifcu; 2539 }; 2540 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32) 2541 #endif 2542 2543 /* 2544 * Interface ioctls. 2545 */ 2546 int 2547 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td) 2548 { 2549 struct ifnet *ifp; 2550 struct ifreq *ifr; 2551 int error; 2552 int oif_flags; 2553 2554 CURVNET_SET(so->so_vnet); 2555 switch (cmd) { 2556 case SIOCGIFCONF: 2557 error = ifconf(cmd, data); 2558 CURVNET_RESTORE(); 2559 return (error); 2560 2561 #ifdef COMPAT_FREEBSD32 2562 case SIOCGIFCONF32: 2563 { 2564 struct ifconf32 *ifc32; 2565 struct ifconf ifc; 2566 2567 ifc32 = (struct ifconf32 *)data; 2568 ifc.ifc_len = ifc32->ifc_len; 2569 ifc.ifc_buf = PTRIN(ifc32->ifc_buf); 2570 2571 error = ifconf(SIOCGIFCONF, (void *)&ifc); 2572 CURVNET_RESTORE(); 2573 if (error == 0) 2574 ifc32->ifc_len = ifc.ifc_len; 2575 return (error); 2576 } 2577 #endif 2578 } 2579 ifr = (struct ifreq *)data; 2580 2581 switch (cmd) { 2582 #ifdef VIMAGE 2583 case SIOCSIFRVNET: 2584 error = priv_check(td, PRIV_NET_SETIFVNET); 2585 if (error == 0) 2586 error = if_vmove_reclaim(td, ifr->ifr_name, 2587 ifr->ifr_jid); 2588 CURVNET_RESTORE(); 2589 return (error); 2590 #endif 2591 case SIOCIFCREATE: 2592 case SIOCIFCREATE2: 2593 error = priv_check(td, PRIV_NET_IFCREATE); 2594 if (error == 0) 2595 error = if_clone_create(ifr->ifr_name, 2596 sizeof(ifr->ifr_name), 2597 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL); 2598 CURVNET_RESTORE(); 2599 return (error); 2600 case SIOCIFDESTROY: 2601 error = priv_check(td, PRIV_NET_IFDESTROY); 2602 if (error == 0) 2603 error = if_clone_destroy(ifr->ifr_name); 2604 CURVNET_RESTORE(); 2605 return (error); 2606 2607 case SIOCIFGCLONERS: 2608 error = if_clone_list((struct if_clonereq *)data); 2609 CURVNET_RESTORE(); 2610 return (error); 2611 case SIOCGIFGMEMB: 2612 error = if_getgroupmembers((struct ifgroupreq *)data); 2613 CURVNET_RESTORE(); 2614 return (error); 2615 #if defined(INET) || defined(INET6) 2616 case SIOCSVH: 2617 case SIOCGVH: 2618 if (carp_ioctl_p == NULL) 2619 error = EPROTONOSUPPORT; 2620 else 2621 error = (*carp_ioctl_p)(ifr, cmd, td); 2622 CURVNET_RESTORE(); 2623 return (error); 2624 #endif 2625 } 2626 2627 ifp = ifunit_ref(ifr->ifr_name); 2628 if (ifp == NULL) { 2629 CURVNET_RESTORE(); 2630 return (ENXIO); 2631 } 2632 2633 error = ifhwioctl(cmd, ifp, data, td); 2634 if (error != ENOIOCTL) { 2635 if_rele(ifp); 2636 CURVNET_RESTORE(); 2637 return (error); 2638 } 2639 2640 oif_flags = ifp->if_flags; 2641 if (so->so_proto == NULL) { 2642 if_rele(ifp); 2643 CURVNET_RESTORE(); 2644 return (EOPNOTSUPP); 2645 } 2646 2647 /* 2648 * Pass the request on to the socket control method, and if the 2649 * latter returns EOPNOTSUPP, directly to the interface. 2650 * 2651 * Make an exception for the legacy SIOCSIF* requests. Drivers 2652 * trust SIOCSIFADDR et al to come from an already privileged 2653 * layer, and do not perform any credentials checks or input 2654 * validation. 2655 */ 2656 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 2657 ifp, td)); 2658 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL && 2659 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR && 2660 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK) 2661 error = (*ifp->if_ioctl)(ifp, cmd, data); 2662 2663 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 2664 #ifdef INET6 2665 if (ifp->if_flags & IFF_UP) 2666 in6_if_up(ifp); 2667 #endif 2668 } 2669 if_rele(ifp); 2670 CURVNET_RESTORE(); 2671 return (error); 2672 } 2673 2674 /* 2675 * The code common to handling reference counted flags, 2676 * e.g., in ifpromisc() and if_allmulti(). 2677 * The "pflag" argument can specify a permanent mode flag to check, 2678 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none. 2679 * 2680 * Only to be used on stack-owned flags, not driver-owned flags. 2681 */ 2682 static int 2683 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch) 2684 { 2685 struct ifreq ifr; 2686 int error; 2687 int oldflags, oldcount; 2688 2689 /* Sanity checks to catch programming errors */ 2690 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0, 2691 ("%s: setting driver-owned flag %d", __func__, flag)); 2692 2693 if (onswitch) 2694 KASSERT(*refcount >= 0, 2695 ("%s: increment negative refcount %d for flag %d", 2696 __func__, *refcount, flag)); 2697 else 2698 KASSERT(*refcount > 0, 2699 ("%s: decrement non-positive refcount %d for flag %d", 2700 __func__, *refcount, flag)); 2701 2702 /* In case this mode is permanent, just touch refcount */ 2703 if (ifp->if_flags & pflag) { 2704 *refcount += onswitch ? 1 : -1; 2705 return (0); 2706 } 2707 2708 /* Save ifnet parameters for if_ioctl() may fail */ 2709 oldcount = *refcount; 2710 oldflags = ifp->if_flags; 2711 2712 /* 2713 * See if we aren't the only and touching refcount is enough. 2714 * Actually toggle interface flag if we are the first or last. 2715 */ 2716 if (onswitch) { 2717 if ((*refcount)++) 2718 return (0); 2719 ifp->if_flags |= flag; 2720 } else { 2721 if (--(*refcount)) 2722 return (0); 2723 ifp->if_flags &= ~flag; 2724 } 2725 2726 /* Call down the driver since we've changed interface flags */ 2727 if (ifp->if_ioctl == NULL) { 2728 error = EOPNOTSUPP; 2729 goto recover; 2730 } 2731 ifr.ifr_flags = ifp->if_flags & 0xffff; 2732 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2733 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 2734 if (error) 2735 goto recover; 2736 /* Notify userland that interface flags have changed */ 2737 rt_ifmsg(ifp); 2738 return (0); 2739 2740 recover: 2741 /* Recover after driver error */ 2742 *refcount = oldcount; 2743 ifp->if_flags = oldflags; 2744 return (error); 2745 } 2746 2747 /* 2748 * Set/clear promiscuous mode on interface ifp based on the truth value 2749 * of pswitch. The calls are reference counted so that only the first 2750 * "on" request actually has an effect, as does the final "off" request. 2751 * Results are undefined if the "off" and "on" requests are not matched. 2752 */ 2753 int 2754 ifpromisc(struct ifnet *ifp, int pswitch) 2755 { 2756 int error; 2757 int oldflags = ifp->if_flags; 2758 2759 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC, 2760 &ifp->if_pcount, pswitch); 2761 /* If promiscuous mode status has changed, log a message */ 2762 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC)) 2763 log(LOG_INFO, "%s: promiscuous mode %s\n", 2764 ifp->if_xname, 2765 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled"); 2766 return (error); 2767 } 2768 2769 /* 2770 * Return interface configuration 2771 * of system. List may be used 2772 * in later ioctl's (above) to get 2773 * other information. 2774 */ 2775 /*ARGSUSED*/ 2776 static int 2777 ifconf(u_long cmd, caddr_t data) 2778 { 2779 struct ifconf *ifc = (struct ifconf *)data; 2780 struct ifnet *ifp; 2781 struct ifaddr *ifa; 2782 struct ifreq ifr; 2783 struct sbuf *sb; 2784 int error, full = 0, valid_len, max_len; 2785 2786 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */ 2787 max_len = MAXPHYS - 1; 2788 2789 /* Prevent hostile input from being able to crash the system */ 2790 if (ifc->ifc_len <= 0) 2791 return (EINVAL); 2792 2793 again: 2794 if (ifc->ifc_len <= max_len) { 2795 max_len = ifc->ifc_len; 2796 full = 1; 2797 } 2798 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN); 2799 max_len = 0; 2800 valid_len = 0; 2801 2802 IFNET_RLOCK(); 2803 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2804 int addrs; 2805 2806 /* 2807 * Zero the ifr_name buffer to make sure we don't 2808 * disclose the contents of the stack. 2809 */ 2810 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name)); 2811 2812 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 2813 >= sizeof(ifr.ifr_name)) { 2814 sbuf_delete(sb); 2815 IFNET_RUNLOCK(); 2816 return (ENAMETOOLONG); 2817 } 2818 2819 addrs = 0; 2820 IF_ADDR_RLOCK(ifp); 2821 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2822 struct sockaddr *sa = ifa->ifa_addr; 2823 2824 if (prison_if(curthread->td_ucred, sa) != 0) 2825 continue; 2826 addrs++; 2827 if (sa->sa_len <= sizeof(*sa)) { 2828 ifr.ifr_addr = *sa; 2829 sbuf_bcat(sb, &ifr, sizeof(ifr)); 2830 max_len += sizeof(ifr); 2831 } else { 2832 sbuf_bcat(sb, &ifr, 2833 offsetof(struct ifreq, ifr_addr)); 2834 max_len += offsetof(struct ifreq, ifr_addr); 2835 sbuf_bcat(sb, sa, sa->sa_len); 2836 max_len += sa->sa_len; 2837 } 2838 2839 if (sbuf_error(sb) == 0) 2840 valid_len = sbuf_len(sb); 2841 } 2842 IF_ADDR_RUNLOCK(ifp); 2843 if (addrs == 0) { 2844 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr)); 2845 sbuf_bcat(sb, &ifr, sizeof(ifr)); 2846 max_len += sizeof(ifr); 2847 2848 if (sbuf_error(sb) == 0) 2849 valid_len = sbuf_len(sb); 2850 } 2851 } 2852 IFNET_RUNLOCK(); 2853 2854 /* 2855 * If we didn't allocate enough space (uncommon), try again. If 2856 * we have already allocated as much space as we are allowed, 2857 * return what we've got. 2858 */ 2859 if (valid_len != max_len && !full) { 2860 sbuf_delete(sb); 2861 goto again; 2862 } 2863 2864 ifc->ifc_len = valid_len; 2865 sbuf_finish(sb); 2866 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len); 2867 sbuf_delete(sb); 2868 return (error); 2869 } 2870 2871 /* 2872 * Just like ifpromisc(), but for all-multicast-reception mode. 2873 */ 2874 int 2875 if_allmulti(struct ifnet *ifp, int onswitch) 2876 { 2877 2878 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch)); 2879 } 2880 2881 struct ifmultiaddr * 2882 if_findmulti(struct ifnet *ifp, struct sockaddr *sa) 2883 { 2884 struct ifmultiaddr *ifma; 2885 2886 IF_ADDR_LOCK_ASSERT(ifp); 2887 2888 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2889 if (sa->sa_family == AF_LINK) { 2890 if (sa_dl_equal(ifma->ifma_addr, sa)) 2891 break; 2892 } else { 2893 if (sa_equal(ifma->ifma_addr, sa)) 2894 break; 2895 } 2896 } 2897 2898 return ifma; 2899 } 2900 2901 /* 2902 * Allocate a new ifmultiaddr and initialize based on passed arguments. We 2903 * make copies of passed sockaddrs. The ifmultiaddr will not be added to 2904 * the ifnet multicast address list here, so the caller must do that and 2905 * other setup work (such as notifying the device driver). The reference 2906 * count is initialized to 1. 2907 */ 2908 static struct ifmultiaddr * 2909 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa, 2910 int mflags) 2911 { 2912 struct ifmultiaddr *ifma; 2913 struct sockaddr *dupsa; 2914 2915 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags | 2916 M_ZERO); 2917 if (ifma == NULL) 2918 return (NULL); 2919 2920 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags); 2921 if (dupsa == NULL) { 2922 free(ifma, M_IFMADDR); 2923 return (NULL); 2924 } 2925 bcopy(sa, dupsa, sa->sa_len); 2926 ifma->ifma_addr = dupsa; 2927 2928 ifma->ifma_ifp = ifp; 2929 ifma->ifma_refcount = 1; 2930 ifma->ifma_protospec = NULL; 2931 2932 if (llsa == NULL) { 2933 ifma->ifma_lladdr = NULL; 2934 return (ifma); 2935 } 2936 2937 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags); 2938 if (dupsa == NULL) { 2939 free(ifma->ifma_addr, M_IFMADDR); 2940 free(ifma, M_IFMADDR); 2941 return (NULL); 2942 } 2943 bcopy(llsa, dupsa, llsa->sa_len); 2944 ifma->ifma_lladdr = dupsa; 2945 2946 return (ifma); 2947 } 2948 2949 /* 2950 * if_freemulti: free ifmultiaddr structure and possibly attached related 2951 * addresses. The caller is responsible for implementing reference 2952 * counting, notifying the driver, handling routing messages, and releasing 2953 * any dependent link layer state. 2954 */ 2955 static void 2956 if_freemulti(struct ifmultiaddr *ifma) 2957 { 2958 2959 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d", 2960 ifma->ifma_refcount)); 2961 2962 if (ifma->ifma_lladdr != NULL) 2963 free(ifma->ifma_lladdr, M_IFMADDR); 2964 free(ifma->ifma_addr, M_IFMADDR); 2965 free(ifma, M_IFMADDR); 2966 } 2967 2968 /* 2969 * Register an additional multicast address with a network interface. 2970 * 2971 * - If the address is already present, bump the reference count on the 2972 * address and return. 2973 * - If the address is not link-layer, look up a link layer address. 2974 * - Allocate address structures for one or both addresses, and attach to the 2975 * multicast address list on the interface. If automatically adding a link 2976 * layer address, the protocol address will own a reference to the link 2977 * layer address, to be freed when it is freed. 2978 * - Notify the network device driver of an addition to the multicast address 2979 * list. 2980 * 2981 * 'sa' points to caller-owned memory with the desired multicast address. 2982 * 2983 * 'retifma' will be used to return a pointer to the resulting multicast 2984 * address reference, if desired. 2985 */ 2986 int 2987 if_addmulti(struct ifnet *ifp, struct sockaddr *sa, 2988 struct ifmultiaddr **retifma) 2989 { 2990 struct ifmultiaddr *ifma, *ll_ifma; 2991 struct sockaddr *llsa; 2992 struct sockaddr_dl sdl; 2993 int error; 2994 2995 /* 2996 * If the address is already present, return a new reference to it; 2997 * otherwise, allocate storage and set up a new address. 2998 */ 2999 IF_ADDR_WLOCK(ifp); 3000 ifma = if_findmulti(ifp, sa); 3001 if (ifma != NULL) { 3002 ifma->ifma_refcount++; 3003 if (retifma != NULL) 3004 *retifma = ifma; 3005 IF_ADDR_WUNLOCK(ifp); 3006 return (0); 3007 } 3008 3009 /* 3010 * The address isn't already present; resolve the protocol address 3011 * into a link layer address, and then look that up, bump its 3012 * refcount or allocate an ifma for that also. 3013 * Most link layer resolving functions returns address data which 3014 * fits inside default sockaddr_dl structure. However callback 3015 * can allocate another sockaddr structure, in that case we need to 3016 * free it later. 3017 */ 3018 llsa = NULL; 3019 ll_ifma = NULL; 3020 if (ifp->if_resolvemulti != NULL) { 3021 /* Provide called function with buffer size information */ 3022 sdl.sdl_len = sizeof(sdl); 3023 llsa = (struct sockaddr *)&sdl; 3024 error = ifp->if_resolvemulti(ifp, &llsa, sa); 3025 if (error) 3026 goto unlock_out; 3027 } 3028 3029 /* 3030 * Allocate the new address. Don't hook it up yet, as we may also 3031 * need to allocate a link layer multicast address. 3032 */ 3033 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT); 3034 if (ifma == NULL) { 3035 error = ENOMEM; 3036 goto free_llsa_out; 3037 } 3038 3039 /* 3040 * If a link layer address is found, we'll need to see if it's 3041 * already present in the address list, or allocate is as well. 3042 * When this block finishes, the link layer address will be on the 3043 * list. 3044 */ 3045 if (llsa != NULL) { 3046 ll_ifma = if_findmulti(ifp, llsa); 3047 if (ll_ifma == NULL) { 3048 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT); 3049 if (ll_ifma == NULL) { 3050 --ifma->ifma_refcount; 3051 if_freemulti(ifma); 3052 error = ENOMEM; 3053 goto free_llsa_out; 3054 } 3055 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma, 3056 ifma_link); 3057 } else 3058 ll_ifma->ifma_refcount++; 3059 ifma->ifma_llifma = ll_ifma; 3060 } 3061 3062 /* 3063 * We now have a new multicast address, ifma, and possibly a new or 3064 * referenced link layer address. Add the primary address to the 3065 * ifnet address list. 3066 */ 3067 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 3068 3069 if (retifma != NULL) 3070 *retifma = ifma; 3071 3072 /* 3073 * Must generate the message while holding the lock so that 'ifma' 3074 * pointer is still valid. 3075 */ 3076 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 3077 IF_ADDR_WUNLOCK(ifp); 3078 3079 /* 3080 * We are certain we have added something, so call down to the 3081 * interface to let them know about it. 3082 */ 3083 if (ifp->if_ioctl != NULL) { 3084 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0); 3085 } 3086 3087 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3088 link_free_sdl(llsa); 3089 3090 return (0); 3091 3092 free_llsa_out: 3093 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3094 link_free_sdl(llsa); 3095 3096 unlock_out: 3097 IF_ADDR_WUNLOCK(ifp); 3098 return (error); 3099 } 3100 3101 /* 3102 * Delete a multicast group membership by network-layer group address. 3103 * 3104 * Returns ENOENT if the entry could not be found. If ifp no longer 3105 * exists, results are undefined. This entry point should only be used 3106 * from subsystems which do appropriate locking to hold ifp for the 3107 * duration of the call. 3108 * Network-layer protocol domains must use if_delmulti_ifma(). 3109 */ 3110 int 3111 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 3112 { 3113 struct ifmultiaddr *ifma; 3114 int lastref; 3115 #ifdef INVARIANTS 3116 struct ifnet *oifp; 3117 3118 IFNET_RLOCK_NOSLEEP(); 3119 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3120 if (ifp == oifp) 3121 break; 3122 if (ifp != oifp) 3123 ifp = NULL; 3124 IFNET_RUNLOCK_NOSLEEP(); 3125 3126 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__)); 3127 #endif 3128 if (ifp == NULL) 3129 return (ENOENT); 3130 3131 IF_ADDR_WLOCK(ifp); 3132 lastref = 0; 3133 ifma = if_findmulti(ifp, sa); 3134 if (ifma != NULL) 3135 lastref = if_delmulti_locked(ifp, ifma, 0); 3136 IF_ADDR_WUNLOCK(ifp); 3137 3138 if (ifma == NULL) 3139 return (ENOENT); 3140 3141 if (lastref && ifp->if_ioctl != NULL) { 3142 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3143 } 3144 3145 return (0); 3146 } 3147 3148 /* 3149 * Delete all multicast group membership for an interface. 3150 * Should be used to quickly flush all multicast filters. 3151 */ 3152 void 3153 if_delallmulti(struct ifnet *ifp) 3154 { 3155 struct ifmultiaddr *ifma; 3156 struct ifmultiaddr *next; 3157 3158 IF_ADDR_WLOCK(ifp); 3159 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 3160 if_delmulti_locked(ifp, ifma, 0); 3161 IF_ADDR_WUNLOCK(ifp); 3162 } 3163 3164 /* 3165 * Delete a multicast group membership by group membership pointer. 3166 * Network-layer protocol domains must use this routine. 3167 * 3168 * It is safe to call this routine if the ifp disappeared. 3169 */ 3170 void 3171 if_delmulti_ifma(struct ifmultiaddr *ifma) 3172 { 3173 struct ifnet *ifp; 3174 int lastref; 3175 3176 ifp = ifma->ifma_ifp; 3177 #ifdef DIAGNOSTIC 3178 if (ifp == NULL) { 3179 printf("%s: ifma_ifp seems to be detached\n", __func__); 3180 } else { 3181 struct ifnet *oifp; 3182 3183 IFNET_RLOCK_NOSLEEP(); 3184 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3185 if (ifp == oifp) 3186 break; 3187 if (ifp != oifp) { 3188 printf("%s: ifnet %p disappeared\n", __func__, ifp); 3189 ifp = NULL; 3190 } 3191 IFNET_RUNLOCK_NOSLEEP(); 3192 } 3193 #endif 3194 /* 3195 * If and only if the ifnet instance exists: Acquire the address lock. 3196 */ 3197 if (ifp != NULL) 3198 IF_ADDR_WLOCK(ifp); 3199 3200 lastref = if_delmulti_locked(ifp, ifma, 0); 3201 3202 if (ifp != NULL) { 3203 /* 3204 * If and only if the ifnet instance exists: 3205 * Release the address lock. 3206 * If the group was left: update the hardware hash filter. 3207 */ 3208 IF_ADDR_WUNLOCK(ifp); 3209 if (lastref && ifp->if_ioctl != NULL) { 3210 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3211 } 3212 } 3213 } 3214 3215 /* 3216 * Perform deletion of network-layer and/or link-layer multicast address. 3217 * 3218 * Return 0 if the reference count was decremented. 3219 * Return 1 if the final reference was released, indicating that the 3220 * hardware hash filter should be reprogrammed. 3221 */ 3222 static int 3223 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching) 3224 { 3225 struct ifmultiaddr *ll_ifma; 3226 3227 if (ifp != NULL && ifma->ifma_ifp != NULL) { 3228 KASSERT(ifma->ifma_ifp == ifp, 3229 ("%s: inconsistent ifp %p", __func__, ifp)); 3230 IF_ADDR_WLOCK_ASSERT(ifp); 3231 } 3232 3233 ifp = ifma->ifma_ifp; 3234 3235 /* 3236 * If the ifnet is detaching, null out references to ifnet, 3237 * so that upper protocol layers will notice, and not attempt 3238 * to obtain locks for an ifnet which no longer exists. The 3239 * routing socket announcement must happen before the ifnet 3240 * instance is detached from the system. 3241 */ 3242 if (detaching) { 3243 #ifdef DIAGNOSTIC 3244 printf("%s: detaching ifnet instance %p\n", __func__, ifp); 3245 #endif 3246 /* 3247 * ifp may already be nulled out if we are being reentered 3248 * to delete the ll_ifma. 3249 */ 3250 if (ifp != NULL) { 3251 rt_newmaddrmsg(RTM_DELMADDR, ifma); 3252 ifma->ifma_ifp = NULL; 3253 } 3254 } 3255 3256 if (--ifma->ifma_refcount > 0) 3257 return 0; 3258 3259 /* 3260 * If this ifma is a network-layer ifma, a link-layer ifma may 3261 * have been associated with it. Release it first if so. 3262 */ 3263 ll_ifma = ifma->ifma_llifma; 3264 if (ll_ifma != NULL) { 3265 KASSERT(ifma->ifma_lladdr != NULL, 3266 ("%s: llifma w/o lladdr", __func__)); 3267 if (detaching) 3268 ll_ifma->ifma_ifp = NULL; /* XXX */ 3269 if (--ll_ifma->ifma_refcount == 0) { 3270 if (ifp != NULL) { 3271 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, 3272 ifma_link); 3273 } 3274 if_freemulti(ll_ifma); 3275 } 3276 } 3277 3278 if (ifp != NULL) 3279 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 3280 3281 if_freemulti(ifma); 3282 3283 /* 3284 * The last reference to this instance of struct ifmultiaddr 3285 * was released; the hardware should be notified of this change. 3286 */ 3287 return 1; 3288 } 3289 3290 /* 3291 * Set the link layer address on an interface. 3292 * 3293 * At this time we only support certain types of interfaces, 3294 * and we don't allow the length of the address to change. 3295 */ 3296 int 3297 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 3298 { 3299 struct sockaddr_dl *sdl; 3300 struct ifaddr *ifa; 3301 struct ifreq ifr; 3302 3303 IF_ADDR_RLOCK(ifp); 3304 ifa = ifp->if_addr; 3305 if (ifa == NULL) { 3306 IF_ADDR_RUNLOCK(ifp); 3307 return (EINVAL); 3308 } 3309 ifa_ref(ifa); 3310 IF_ADDR_RUNLOCK(ifp); 3311 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 3312 if (sdl == NULL) { 3313 ifa_free(ifa); 3314 return (EINVAL); 3315 } 3316 if (len != sdl->sdl_alen) { /* don't allow length to change */ 3317 ifa_free(ifa); 3318 return (EINVAL); 3319 } 3320 switch (ifp->if_type) { 3321 case IFT_ETHER: 3322 case IFT_FDDI: 3323 case IFT_XETHER: 3324 case IFT_ISO88025: 3325 case IFT_L2VLAN: 3326 case IFT_BRIDGE: 3327 case IFT_ARCNET: 3328 case IFT_IEEE8023ADLAG: 3329 case IFT_IEEE80211: 3330 bcopy(lladdr, LLADDR(sdl), len); 3331 ifa_free(ifa); 3332 break; 3333 default: 3334 ifa_free(ifa); 3335 return (ENODEV); 3336 } 3337 3338 /* 3339 * If the interface is already up, we need 3340 * to re-init it in order to reprogram its 3341 * address filter. 3342 */ 3343 if ((ifp->if_flags & IFF_UP) != 0) { 3344 if (ifp->if_ioctl) { 3345 ifp->if_flags &= ~IFF_UP; 3346 ifr.ifr_flags = ifp->if_flags & 0xffff; 3347 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3348 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3349 ifp->if_flags |= IFF_UP; 3350 ifr.ifr_flags = ifp->if_flags & 0xffff; 3351 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3352 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3353 } 3354 #ifdef INET 3355 /* 3356 * Also send gratuitous ARPs to notify other nodes about 3357 * the address change. 3358 */ 3359 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 3360 if (ifa->ifa_addr->sa_family == AF_INET) 3361 arp_ifinit(ifp, ifa); 3362 } 3363 #endif 3364 } 3365 return (0); 3366 } 3367 3368 /* 3369 * The name argument must be a pointer to storage which will last as 3370 * long as the interface does. For physical devices, the result of 3371 * device_get_name(dev) is a good choice and for pseudo-devices a 3372 * static string works well. 3373 */ 3374 void 3375 if_initname(struct ifnet *ifp, const char *name, int unit) 3376 { 3377 ifp->if_dname = name; 3378 ifp->if_dunit = unit; 3379 if (unit != IF_DUNIT_NONE) 3380 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 3381 else 3382 strlcpy(ifp->if_xname, name, IFNAMSIZ); 3383 } 3384 3385 int 3386 if_printf(struct ifnet *ifp, const char * fmt, ...) 3387 { 3388 va_list ap; 3389 int retval; 3390 3391 retval = printf("%s: ", ifp->if_xname); 3392 va_start(ap, fmt); 3393 retval += vprintf(fmt, ap); 3394 va_end(ap); 3395 return (retval); 3396 } 3397 3398 void 3399 if_start(struct ifnet *ifp) 3400 { 3401 3402 (*(ifp)->if_start)(ifp); 3403 } 3404 3405 /* 3406 * Backwards compatibility interface for drivers 3407 * that have not implemented it 3408 */ 3409 static int 3410 if_transmit(struct ifnet *ifp, struct mbuf *m) 3411 { 3412 int error; 3413 3414 IFQ_HANDOFF(ifp, m, error); 3415 return (error); 3416 } 3417 3418 int 3419 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust) 3420 { 3421 int active = 0; 3422 3423 IF_LOCK(ifq); 3424 if (_IF_QFULL(ifq)) { 3425 _IF_DROP(ifq); 3426 IF_UNLOCK(ifq); 3427 m_freem(m); 3428 return (0); 3429 } 3430 if (ifp != NULL) { 3431 ifp->if_obytes += m->m_pkthdr.len + adjust; 3432 if (m->m_flags & (M_BCAST|M_MCAST)) 3433 ifp->if_omcasts++; 3434 active = ifp->if_drv_flags & IFF_DRV_OACTIVE; 3435 } 3436 _IF_ENQUEUE(ifq, m); 3437 IF_UNLOCK(ifq); 3438 if (ifp != NULL && !active) 3439 (*(ifp)->if_start)(ifp); 3440 return (1); 3441 } 3442 3443 void 3444 if_register_com_alloc(u_char type, 3445 if_com_alloc_t *a, if_com_free_t *f) 3446 { 3447 3448 KASSERT(if_com_alloc[type] == NULL, 3449 ("if_register_com_alloc: %d already registered", type)); 3450 KASSERT(if_com_free[type] == NULL, 3451 ("if_register_com_alloc: %d free already registered", type)); 3452 3453 if_com_alloc[type] = a; 3454 if_com_free[type] = f; 3455 } 3456 3457 void 3458 if_deregister_com_alloc(u_char type) 3459 { 3460 3461 KASSERT(if_com_alloc[type] != NULL, 3462 ("if_deregister_com_alloc: %d not registered", type)); 3463 KASSERT(if_com_free[type] != NULL, 3464 ("if_deregister_com_alloc: %d free not registered", type)); 3465 if_com_alloc[type] = NULL; 3466 if_com_free[type] = NULL; 3467 } 3468 3469 /* API for driver access to network stack owned ifnet.*/ 3470 uint64_t 3471 if_setbaudrate(void *arg, uint64_t baudrate) 3472 { 3473 struct ifnet *ifp = arg; 3474 uint64_t oldbrate; 3475 3476 oldbrate = ifp->if_baudrate; 3477 ifp->if_baudrate = baudrate; 3478 return (oldbrate); 3479 } 3480 3481 uint64_t 3482 if_getbaudrate(if_t ifp) 3483 { 3484 3485 return (((struct ifnet *)ifp)->if_baudrate); 3486 } 3487 3488 int 3489 if_setcapabilities(if_t ifp, int capabilities) 3490 { 3491 ((struct ifnet *)ifp)->if_capabilities = capabilities; 3492 return (0); 3493 } 3494 3495 int 3496 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit) 3497 { 3498 ((struct ifnet *)ifp)->if_capabilities |= setbit; 3499 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit; 3500 3501 return (0); 3502 } 3503 3504 int 3505 if_getcapabilities(if_t ifp) 3506 { 3507 return ((struct ifnet *)ifp)->if_capabilities; 3508 } 3509 3510 int 3511 if_setcapenable(if_t ifp, int capabilities) 3512 { 3513 ((struct ifnet *)ifp)->if_capenable = capabilities; 3514 return (0); 3515 } 3516 3517 int 3518 if_setcapenablebit(if_t ifp, int setcap, int clearcap) 3519 { 3520 if(setcap) 3521 ((struct ifnet *)ifp)->if_capenable |= setcap; 3522 if(clearcap) 3523 ((struct ifnet *)ifp)->if_capenable &= ~clearcap; 3524 3525 return (0); 3526 } 3527 3528 const char * 3529 if_getdname(if_t ifp) 3530 { 3531 return ((struct ifnet *)ifp)->if_dname; 3532 } 3533 3534 int 3535 if_togglecapenable(if_t ifp, int togglecap) 3536 { 3537 ((struct ifnet *)ifp)->if_capenable ^= togglecap; 3538 return (0); 3539 } 3540 3541 int 3542 if_getcapenable(if_t ifp) 3543 { 3544 return ((struct ifnet *)ifp)->if_capenable; 3545 } 3546 3547 /* 3548 * This is largely undesirable because it ties ifnet to a device, but does 3549 * provide flexiblity for an embedded product vendor. Should be used with 3550 * the understanding that it violates the interface boundaries, and should be 3551 * a last resort only. 3552 */ 3553 int 3554 if_setdev(if_t ifp, void *dev) 3555 { 3556 return (0); 3557 } 3558 3559 int 3560 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags) 3561 { 3562 ((struct ifnet *)ifp)->if_drv_flags |= set_flags; 3563 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags; 3564 3565 return (0); 3566 } 3567 3568 int 3569 if_getdrvflags(if_t ifp) 3570 { 3571 return ((struct ifnet *)ifp)->if_drv_flags; 3572 } 3573 3574 int 3575 if_setdrvflags(if_t ifp, int flags) 3576 { 3577 ((struct ifnet *)ifp)->if_drv_flags = flags; 3578 return (0); 3579 } 3580 3581 3582 int 3583 if_setflags(if_t ifp, int flags) 3584 { 3585 ((struct ifnet *)ifp)->if_flags = flags; 3586 return (0); 3587 } 3588 3589 int 3590 if_setflagbits(if_t ifp, int set, int clear) 3591 { 3592 ((struct ifnet *)ifp)->if_flags |= set; 3593 ((struct ifnet *)ifp)->if_flags &= ~clear; 3594 3595 return (0); 3596 } 3597 3598 int 3599 if_getflags(if_t ifp) 3600 { 3601 return ((struct ifnet *)ifp)->if_flags; 3602 } 3603 3604 int 3605 if_clearhwassist(if_t ifp) 3606 { 3607 ((struct ifnet *)ifp)->if_hwassist = 0; 3608 return (0); 3609 } 3610 3611 int 3612 if_sethwassistbits(if_t ifp, int toset, int toclear) 3613 { 3614 ((struct ifnet *)ifp)->if_hwassist |= toset; 3615 ((struct ifnet *)ifp)->if_hwassist &= ~toclear; 3616 3617 return (0); 3618 } 3619 3620 int 3621 if_sethwassist(if_t ifp, int hwassist_bit) 3622 { 3623 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit; 3624 return (0); 3625 } 3626 3627 int 3628 if_gethwassist(if_t ifp) 3629 { 3630 return ((struct ifnet *)ifp)->if_hwassist; 3631 } 3632 3633 int 3634 if_setmtu(if_t ifp, int mtu) 3635 { 3636 ((struct ifnet *)ifp)->if_mtu = mtu; 3637 return (0); 3638 } 3639 3640 int 3641 if_getmtu(if_t ifp) 3642 { 3643 return ((struct ifnet *)ifp)->if_mtu; 3644 } 3645 3646 int 3647 if_setsoftc(if_t ifp, void *softc) 3648 { 3649 ((struct ifnet *)ifp)->if_softc = softc; 3650 return (0); 3651 } 3652 3653 void * 3654 if_getsoftc(if_t ifp) 3655 { 3656 return ((struct ifnet *)ifp)->if_softc; 3657 } 3658 3659 void 3660 if_setrcvif(struct mbuf *m, if_t ifp) 3661 { 3662 m->m_pkthdr.rcvif = (struct ifnet *)ifp; 3663 } 3664 3665 void 3666 if_setvtag(struct mbuf *m, uint16_t tag) 3667 { 3668 m->m_pkthdr.ether_vtag = tag; 3669 } 3670 3671 uint16_t 3672 if_getvtag(struct mbuf *m) 3673 { 3674 3675 return (m->m_pkthdr.ether_vtag); 3676 } 3677 3678 /* Statistics */ 3679 int 3680 if_incipackets(if_t ifp, int pkts) 3681 { 3682 ((struct ifnet *)ifp)->if_ipackets += pkts; 3683 return (0); 3684 } 3685 3686 int 3687 if_incopackets(if_t ifp, int pkts) 3688 { 3689 ((struct ifnet *)ifp)->if_opackets += pkts; 3690 return (0); 3691 } 3692 3693 int 3694 if_incierrors(if_t ifp, int ierrors) 3695 { 3696 ((struct ifnet *)ifp)->if_ierrors += ierrors; 3697 return (0); 3698 } 3699 3700 3701 int 3702 if_setierrors(if_t ifp, int ierrors) 3703 { 3704 ((struct ifnet *)ifp)->if_ierrors = ierrors; 3705 return (0); 3706 } 3707 3708 int 3709 if_setoerrors(if_t ifp, int oerrors) 3710 { 3711 ((struct ifnet *)ifp)->if_oerrors = oerrors; 3712 return (0); 3713 } 3714 3715 int if_incoerrors(if_t ifp, int oerrors) 3716 { 3717 ((struct ifnet *)ifp)->if_oerrors += oerrors; 3718 return (0); 3719 } 3720 3721 int if_inciqdrops(if_t ifp, int val) 3722 { 3723 ((struct ifnet *)ifp)->if_iqdrops += val; 3724 return (0); 3725 } 3726 3727 int 3728 if_setcollisions(if_t ifp, int collisions) 3729 { 3730 ((struct ifnet *)ifp)->if_collisions = collisions; 3731 return (0); 3732 } 3733 3734 int 3735 if_inccollisions(if_t ifp, int collisions) 3736 { 3737 ((struct ifnet *)ifp)->if_collisions += collisions; 3738 return (0); 3739 } 3740 3741 int 3742 if_setipackets(if_t ifp, int pkts) 3743 { 3744 ((struct ifnet *)ifp)->if_ipackets = pkts; 3745 return (0); 3746 } 3747 3748 int 3749 if_setopackets(if_t ifp, int pkts) 3750 { 3751 ((struct ifnet *)ifp)->if_opackets = pkts; 3752 return (0); 3753 } 3754 3755 int 3756 if_incobytes(if_t ifp, int bytes) 3757 { 3758 ((struct ifnet *)ifp)->if_obytes += bytes; 3759 return (0); 3760 } 3761 3762 int 3763 if_setibytes(if_t ifp, int bytes) 3764 { 3765 ((struct ifnet *)ifp)->if_ibytes = bytes; 3766 return (0); 3767 } 3768 3769 int 3770 if_setobytes(if_t ifp, int bytes) 3771 { 3772 ((struct ifnet *)ifp)->if_obytes = bytes; 3773 return (0); 3774 } 3775 3776 3777 int 3778 if_sendq_empty(if_t ifp) 3779 { 3780 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd); 3781 } 3782 3783 int if_getiqdrops(if_t ifp) 3784 { 3785 return ((struct ifnet *)ifp)->if_iqdrops; 3786 } 3787 3788 int 3789 if_incimcasts(if_t ifp, int mcast) 3790 { 3791 ((struct ifnet *)ifp)->if_imcasts += mcast; 3792 return (0); 3793 } 3794 3795 3796 int 3797 if_incomcasts(if_t ifp, int mcast) 3798 { 3799 ((struct ifnet *)ifp)->if_omcasts += mcast; 3800 return (0); 3801 } 3802 3803 int 3804 if_setimcasts(if_t ifp, int mcast) 3805 { 3806 ((struct ifnet *)ifp)->if_imcasts = mcast; 3807 return (0); 3808 } 3809 3810 3811 struct ifaddr * 3812 if_getifaddr(if_t ifp) 3813 { 3814 return ((struct ifnet *)ifp)->if_addr; 3815 } 3816 3817 int 3818 if_getamcount(if_t ifp) 3819 { 3820 return ((struct ifnet *)ifp)->if_amcount; 3821 } 3822 3823 3824 int 3825 if_setsendqready(if_t ifp) 3826 { 3827 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd); 3828 return (0); 3829 } 3830 3831 int 3832 if_setsendqlen(if_t ifp, int tx_desc_count) 3833 { 3834 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count); 3835 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count; 3836 3837 return (0); 3838 } 3839 3840 int 3841 if_vlantrunkinuse(if_t ifp) 3842 { 3843 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0; 3844 } 3845 3846 int 3847 if_input(if_t ifp, struct mbuf* sendmp) 3848 { 3849 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp); 3850 return (0); 3851 3852 } 3853 3854 /* XXX */ 3855 #ifndef ETH_ADDR_LEN 3856 #define ETH_ADDR_LEN 6 3857 #endif 3858 3859 int 3860 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max) 3861 { 3862 struct ifmultiaddr *ifma; 3863 uint8_t *lmta = (uint8_t *)mta; 3864 int mcnt = 0; 3865 3866 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 3867 if (ifma->ifma_addr->sa_family != AF_LINK) 3868 continue; 3869 3870 if (mcnt == max) 3871 break; 3872 3873 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 3874 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN); 3875 mcnt++; 3876 } 3877 *cnt = mcnt; 3878 3879 return (0); 3880 } 3881 3882 int 3883 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max) 3884 { 3885 int error; 3886 3887 if_maddr_rlock(ifp); 3888 error = if_setupmultiaddr(ifp, mta, cnt, max); 3889 if_maddr_runlock(ifp); 3890 return (error); 3891 } 3892 3893 int 3894 if_multiaddr_count(if_t ifp, int max) 3895 { 3896 struct ifmultiaddr *ifma; 3897 int count; 3898 3899 count = 0; 3900 if_maddr_rlock(ifp); 3901 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 3902 if (ifma->ifma_addr->sa_family != AF_LINK) 3903 continue; 3904 count++; 3905 if (count == max) 3906 break; 3907 } 3908 if_maddr_runlock(ifp); 3909 return (count); 3910 } 3911 3912 struct mbuf * 3913 if_dequeue(if_t ifp) 3914 { 3915 struct mbuf *m; 3916 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m); 3917 3918 return (m); 3919 } 3920 3921 int 3922 if_sendq_prepend(if_t ifp, struct mbuf *m) 3923 { 3924 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m); 3925 return (0); 3926 } 3927 3928 int 3929 if_setifheaderlen(if_t ifp, int len) 3930 { 3931 ((struct ifnet *)ifp)->if_data.ifi_hdrlen = len; 3932 return (0); 3933 } 3934 3935 caddr_t 3936 if_getlladdr(if_t ifp) 3937 { 3938 return (IF_LLADDR((struct ifnet *)ifp)); 3939 } 3940 3941 void * 3942 if_gethandle(u_char type) 3943 { 3944 return (if_alloc(type)); 3945 } 3946 3947 void 3948 if_bpfmtap(if_t ifh, struct mbuf *m) 3949 { 3950 struct ifnet *ifp = (struct ifnet *)ifh; 3951 3952 BPF_MTAP(ifp, m); 3953 } 3954 3955 void 3956 if_etherbpfmtap(if_t ifh, struct mbuf *m) 3957 { 3958 struct ifnet *ifp = (struct ifnet *)ifh; 3959 3960 ETHER_BPF_MTAP(ifp, m); 3961 } 3962 3963 void 3964 if_vlancap(if_t ifh) 3965 { 3966 struct ifnet *ifp = (struct ifnet *)ifh; 3967 VLAN_CAPABILITIES(ifp); 3968 } 3969 3970 void 3971 if_setinitfn(if_t ifp, void (*init_fn)(void *)) 3972 { 3973 ((struct ifnet *)ifp)->if_init = init_fn; 3974 } 3975 3976 void 3977 if_setioctlfn(if_t ifp, int (*ioctl_fn)(void *, u_long, caddr_t)) 3978 { 3979 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn; 3980 } 3981 3982 void 3983 if_setstartfn(if_t ifp, void (*start_fn)(void *)) 3984 { 3985 ((struct ifnet *)ifp)->if_start = (void *)start_fn; 3986 } 3987 3988 void 3989 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn) 3990 { 3991 ((struct ifnet *)ifp)->if_transmit = start_fn; 3992 } 3993 3994 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn) 3995 { 3996 ((struct ifnet *)ifp)->if_qflush = flush_fn; 3997 3998 } 3999 4000 /* These wrappers are hopefully temporary, till all drivers use drvapi */ 4001 #ifdef INET 4002 void 4003 arp_ifinit_drv(if_t ifh, struct ifaddr *ifa) 4004 { 4005 arp_ifinit((struct ifnet *)ifh, ifa); 4006 } 4007 #endif 4008 4009 void 4010 ether_ifattach_drv(if_t ifh, const u_int8_t *lla) 4011 { 4012 ether_ifattach((struct ifnet *)ifh, lla); 4013 } 4014 4015 void 4016 ether_ifdetach_drv(if_t ifh) 4017 { 4018 ether_ifdetach((struct ifnet *)ifh); 4019 } 4020 4021 int 4022 ether_ioctl_drv(if_t ifh, u_long cmd, caddr_t data) 4023 { 4024 struct ifnet *ifp = (struct ifnet *)ifh; 4025 4026 return (ether_ioctl(ifp, cmd, data)); 4027 } 4028 4029 int 4030 ifmedia_ioctl_drv(if_t ifh, struct ifreq *ifr, struct ifmedia *ifm, 4031 u_long cmd) 4032 { 4033 struct ifnet *ifp = (struct ifnet *)ifh; 4034 4035 return (ifmedia_ioctl(ifp, ifr, ifm, cmd)); 4036 } 4037 4038 void 4039 if_free_drv(if_t ifh) 4040 { 4041 if_free((struct ifnet *)ifh); 4042 } 4043 4044 void 4045 if_initname_drv(if_t ifh, const char *name, int unit) 4046 { 4047 if_initname((struct ifnet *)ifh, name, unit); 4048 } 4049 4050 void 4051 if_linkstate_change_drv(if_t ifh, int link_state) 4052 { 4053 if_link_state_change((struct ifnet *)ifh, link_state); 4054 } 4055 4056 void 4057 ifmedia_init_drv(struct ifmedia *ifm, int ncmask, int (*chg_cb)(void *), 4058 void (*sts_cb)(void *, struct ifmediareq *)) 4059 { 4060 ifmedia_init(ifm, ncmask, (ifm_change_cb_t)chg_cb, 4061 (ifm_stat_cb_t)sts_cb); 4062 } 4063 4064 void 4065 if_addr_rlock_drv(if_t ifh) 4066 { 4067 4068 if_addr_runlock((struct ifnet *)ifh); 4069 } 4070 4071 void 4072 if_addr_runlock_drv(if_t ifh) 4073 { 4074 if_addr_runlock((struct ifnet *)ifh); 4075 } 4076 4077 void 4078 if_qflush_drv(if_t ifh) 4079 { 4080 if_qflush((struct ifnet *)ifh); 4081 4082 } 4083 4084 /* Revisit these - These are inline functions originally. */ 4085 int 4086 drbr_inuse_drv(if_t ifh, struct buf_ring *br) 4087 { 4088 return drbr_inuse_drv(ifh, br); 4089 } 4090 4091 struct mbuf* 4092 drbr_dequeue_drv(if_t ifh, struct buf_ring *br) 4093 { 4094 return drbr_dequeue(ifh, br); 4095 } 4096 4097 int 4098 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br) 4099 { 4100 return drbr_needs_enqueue(ifh, br); 4101 } 4102 4103 int 4104 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m) 4105 { 4106 return drbr_enqueue(ifh, br, m); 4107 4108 } 4109