1 /*- 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)if.c 8.5 (Berkeley) 1/9/95 30 * $FreeBSD$ 31 */ 32 33 #include "opt_compat.h" 34 #include "opt_inet6.h" 35 #include "opt_inet.h" 36 37 #include <sys/param.h> 38 #include <sys/types.h> 39 #include <sys/conf.h> 40 #include <sys/malloc.h> 41 #include <sys/sbuf.h> 42 #include <sys/bus.h> 43 #include <sys/mbuf.h> 44 #include <sys/systm.h> 45 #include <sys/priv.h> 46 #include <sys/proc.h> 47 #include <sys/socket.h> 48 #include <sys/socketvar.h> 49 #include <sys/protosw.h> 50 #include <sys/kernel.h> 51 #include <sys/lock.h> 52 #include <sys/refcount.h> 53 #include <sys/module.h> 54 #include <sys/rwlock.h> 55 #include <sys/sockio.h> 56 #include <sys/syslog.h> 57 #include <sys/sysctl.h> 58 #include <sys/taskqueue.h> 59 #include <sys/domain.h> 60 #include <sys/jail.h> 61 #include <sys/priv.h> 62 63 #include <machine/stdarg.h> 64 #include <vm/uma.h> 65 66 #include <net/bpf.h> 67 #include <net/ethernet.h> 68 #include <net/if.h> 69 #include <net/if_arp.h> 70 #include <net/if_clone.h> 71 #include <net/if_dl.h> 72 #include <net/if_types.h> 73 #include <net/if_var.h> 74 #include <net/if_media.h> 75 #include <net/if_vlan_var.h> 76 #include <net/radix.h> 77 #include <net/route.h> 78 #include <net/vnet.h> 79 80 #if defined(INET) || defined(INET6) 81 #include <net/ethernet.h> 82 #include <netinet/in.h> 83 #include <netinet/in_var.h> 84 #include <netinet/ip.h> 85 #include <netinet/ip_carp.h> 86 #ifdef INET 87 #include <netinet/if_ether.h> 88 #endif /* INET */ 89 #ifdef INET6 90 #include <netinet6/in6_var.h> 91 #include <netinet6/in6_ifattach.h> 92 #endif /* INET6 */ 93 #endif /* INET || INET6 */ 94 95 #include <security/mac/mac_framework.h> 96 97 #ifdef COMPAT_FREEBSD32 98 #include <sys/mount.h> 99 #include <compat/freebsd32/freebsd32.h> 100 #endif 101 102 struct ifindex_entry { 103 struct ifnet *ife_ifnet; 104 }; 105 106 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers"); 107 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management"); 108 109 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN, 110 &ifqmaxlen, 0, "max send queue size"); 111 112 /* Log link state change events */ 113 static int log_link_state_change = 1; 114 115 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW, 116 &log_link_state_change, 0, 117 "log interface link state change events"); 118 119 /* Interface description */ 120 static unsigned int ifdescr_maxlen = 1024; 121 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW, 122 &ifdescr_maxlen, 0, 123 "administrative maximum length for interface description"); 124 125 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions"); 126 127 /* global sx for non-critical path ifdescr */ 128 static struct sx ifdescr_sx; 129 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr"); 130 131 void (*bridge_linkstate_p)(struct ifnet *ifp); 132 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state); 133 void (*lagg_linkstate_p)(struct ifnet *ifp, int state); 134 /* These are external hooks for CARP. */ 135 void (*carp_linkstate_p)(struct ifnet *ifp); 136 void (*carp_demote_adj_p)(int, char *); 137 int (*carp_master_p)(struct ifaddr *); 138 #if defined(INET) || defined(INET6) 139 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost); 140 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m, 141 const struct sockaddr *sa); 142 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *); 143 int (*carp_attach_p)(struct ifaddr *, int); 144 void (*carp_detach_p)(struct ifaddr *); 145 #endif 146 #ifdef INET 147 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **); 148 #endif 149 #ifdef INET6 150 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6); 151 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m, 152 const struct in6_addr *taddr); 153 #endif 154 155 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL; 156 157 /* 158 * XXX: Style; these should be sorted alphabetically, and unprototyped 159 * static functions should be prototyped. Currently they are sorted by 160 * declaration order. 161 */ 162 static void if_attachdomain(void *); 163 static void if_attachdomain1(struct ifnet *); 164 static int ifconf(u_long, caddr_t); 165 static void if_freemulti(struct ifmultiaddr *); 166 static void if_init(void *); 167 static void if_grow(void); 168 static void if_route(struct ifnet *, int flag, int fam); 169 static int if_setflag(struct ifnet *, int, int, int *, int); 170 static int if_transmit(struct ifnet *ifp, struct mbuf *m); 171 static void if_unroute(struct ifnet *, int flag, int fam); 172 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 173 static int if_rtdel(struct radix_node *, void *); 174 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *); 175 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int); 176 static void do_link_state_change(void *, int); 177 static int if_getgroup(struct ifgroupreq *, struct ifnet *); 178 static int if_getgroupmembers(struct ifgroupreq *); 179 static void if_delgroups(struct ifnet *); 180 static void if_attach_internal(struct ifnet *, int); 181 static void if_detach_internal(struct ifnet *, int); 182 183 #ifdef INET6 184 /* 185 * XXX: declare here to avoid to include many inet6 related files.. 186 * should be more generalized? 187 */ 188 extern void nd6_setmtu(struct ifnet *); 189 #endif 190 191 VNET_DEFINE(int, if_index); 192 int ifqmaxlen = IFQ_MAXLEN; 193 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */ 194 VNET_DEFINE(struct ifgrouphead, ifg_head); 195 196 static VNET_DEFINE(int, if_indexlim) = 8; 197 198 /* Table of ifnet by index. */ 199 VNET_DEFINE(struct ifindex_entry *, ifindex_table); 200 201 #define V_if_indexlim VNET(if_indexlim) 202 #define V_ifindex_table VNET(ifindex_table) 203 204 /* 205 * The global network interface list (V_ifnet) and related state (such as 206 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and 207 * an rwlock. Either may be acquired shared to stablize the list, but both 208 * must be acquired writable to modify the list. This model allows us to 209 * both stablize the interface list during interrupt thread processing, but 210 * also to stablize it over long-running ioctls, without introducing priority 211 * inversions and deadlocks. 212 */ 213 struct rwlock ifnet_rwlock; 214 struct sx ifnet_sxlock; 215 216 /* 217 * The allocation of network interfaces is a rather non-atomic affair; we 218 * need to select an index before we are ready to expose the interface for 219 * use, so will use this pointer value to indicate reservation. 220 */ 221 #define IFNET_HOLD (void *)(uintptr_t)(-1) 222 223 static if_com_alloc_t *if_com_alloc[256]; 224 static if_com_free_t *if_com_free[256]; 225 226 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals"); 227 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 228 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 229 230 struct ifnet * 231 ifnet_byindex_locked(u_short idx) 232 { 233 234 if (idx > V_if_index) 235 return (NULL); 236 if (V_ifindex_table[idx].ife_ifnet == IFNET_HOLD) 237 return (NULL); 238 return (V_ifindex_table[idx].ife_ifnet); 239 } 240 241 struct ifnet * 242 ifnet_byindex(u_short idx) 243 { 244 struct ifnet *ifp; 245 246 IFNET_RLOCK_NOSLEEP(); 247 ifp = ifnet_byindex_locked(idx); 248 IFNET_RUNLOCK_NOSLEEP(); 249 return (ifp); 250 } 251 252 struct ifnet * 253 ifnet_byindex_ref(u_short idx) 254 { 255 struct ifnet *ifp; 256 257 IFNET_RLOCK_NOSLEEP(); 258 ifp = ifnet_byindex_locked(idx); 259 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) { 260 IFNET_RUNLOCK_NOSLEEP(); 261 return (NULL); 262 } 263 if_ref(ifp); 264 IFNET_RUNLOCK_NOSLEEP(); 265 return (ifp); 266 } 267 268 /* 269 * Allocate an ifindex array entry; return 0 on success or an error on 270 * failure. 271 */ 272 static int 273 ifindex_alloc_locked(u_short *idxp) 274 { 275 u_short idx; 276 277 IFNET_WLOCK_ASSERT(); 278 279 retry: 280 /* 281 * Try to find an empty slot below V_if_index. If we fail, take the 282 * next slot. 283 */ 284 for (idx = 1; idx <= V_if_index; idx++) { 285 if (V_ifindex_table[idx].ife_ifnet == NULL) 286 break; 287 } 288 289 /* Catch if_index overflow. */ 290 if (idx >= V_if_indexlim) { 291 if_grow(); 292 goto retry; 293 } 294 if (idx > V_if_index) 295 V_if_index = idx; 296 *idxp = idx; 297 return (0); 298 } 299 300 static void 301 ifindex_free_locked(u_short idx) 302 { 303 304 IFNET_WLOCK_ASSERT(); 305 306 V_ifindex_table[idx].ife_ifnet = NULL; 307 while (V_if_index > 0 && 308 V_ifindex_table[V_if_index].ife_ifnet == NULL) 309 V_if_index--; 310 } 311 312 static void 313 ifindex_free(u_short idx) 314 { 315 316 IFNET_WLOCK(); 317 ifindex_free_locked(idx); 318 IFNET_WUNLOCK(); 319 } 320 321 static void 322 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp) 323 { 324 325 IFNET_WLOCK_ASSERT(); 326 327 V_ifindex_table[idx].ife_ifnet = ifp; 328 } 329 330 static void 331 ifnet_setbyindex(u_short idx, struct ifnet *ifp) 332 { 333 334 IFNET_WLOCK(); 335 ifnet_setbyindex_locked(idx, ifp); 336 IFNET_WUNLOCK(); 337 } 338 339 struct ifaddr * 340 ifaddr_byindex(u_short idx) 341 { 342 struct ifaddr *ifa; 343 344 IFNET_RLOCK_NOSLEEP(); 345 ifa = ifnet_byindex_locked(idx)->if_addr; 346 if (ifa != NULL) 347 ifa_ref(ifa); 348 IFNET_RUNLOCK_NOSLEEP(); 349 return (ifa); 350 } 351 352 /* 353 * Network interface utility routines. 354 * 355 * Routines with ifa_ifwith* names take sockaddr *'s as 356 * parameters. 357 */ 358 359 static void 360 vnet_if_init(const void *unused __unused) 361 { 362 363 TAILQ_INIT(&V_ifnet); 364 TAILQ_INIT(&V_ifg_head); 365 IFNET_WLOCK(); 366 if_grow(); /* create initial table */ 367 IFNET_WUNLOCK(); 368 vnet_if_clone_init(); 369 } 370 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init, 371 NULL); 372 373 /* ARGSUSED*/ 374 static void 375 if_init(void *dummy __unused) 376 { 377 378 IFNET_LOCK_INIT(); 379 if_clone_init(); 380 } 381 SYSINIT(interfaces, SI_SUB_INIT_IF, SI_ORDER_FIRST, if_init, NULL); 382 383 384 #ifdef VIMAGE 385 static void 386 vnet_if_uninit(const void *unused __unused) 387 { 388 389 VNET_ASSERT(TAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p " 390 "not empty", __func__, __LINE__, &V_ifnet)); 391 VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p " 392 "not empty", __func__, __LINE__, &V_ifg_head)); 393 394 free((caddr_t)V_ifindex_table, M_IFNET); 395 } 396 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST, 397 vnet_if_uninit, NULL); 398 #endif 399 400 static void 401 if_grow(void) 402 { 403 int oldlim; 404 u_int n; 405 struct ifindex_entry *e; 406 407 IFNET_WLOCK_ASSERT(); 408 oldlim = V_if_indexlim; 409 IFNET_WUNLOCK(); 410 n = (oldlim << 1) * sizeof(*e); 411 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO); 412 IFNET_WLOCK(); 413 if (V_if_indexlim != oldlim) { 414 free(e, M_IFNET); 415 return; 416 } 417 if (V_ifindex_table != NULL) { 418 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2); 419 free((caddr_t)V_ifindex_table, M_IFNET); 420 } 421 V_if_indexlim <<= 1; 422 V_ifindex_table = e; 423 } 424 425 /* 426 * Allocate a struct ifnet and an index for an interface. A layer 2 427 * common structure will also be allocated if an allocation routine is 428 * registered for the passed type. 429 */ 430 struct ifnet * 431 if_alloc(u_char type) 432 { 433 struct ifnet *ifp; 434 u_short idx; 435 436 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO); 437 IFNET_WLOCK(); 438 if (ifindex_alloc_locked(&idx) != 0) { 439 IFNET_WUNLOCK(); 440 free(ifp, M_IFNET); 441 return (NULL); 442 } 443 ifnet_setbyindex_locked(idx, IFNET_HOLD); 444 IFNET_WUNLOCK(); 445 ifp->if_index = idx; 446 ifp->if_type = type; 447 ifp->if_alloctype = type; 448 if (if_com_alloc[type] != NULL) { 449 ifp->if_l2com = if_com_alloc[type](type, ifp); 450 if (ifp->if_l2com == NULL) { 451 free(ifp, M_IFNET); 452 ifindex_free(idx); 453 return (NULL); 454 } 455 } 456 457 IF_ADDR_LOCK_INIT(ifp); 458 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp); 459 ifp->if_afdata_initialized = 0; 460 IF_AFDATA_LOCK_INIT(ifp); 461 TAILQ_INIT(&ifp->if_addrhead); 462 TAILQ_INIT(&ifp->if_multiaddrs); 463 TAILQ_INIT(&ifp->if_groups); 464 #ifdef MAC 465 mac_ifnet_init(ifp); 466 #endif 467 ifq_init(&ifp->if_snd, ifp); 468 469 refcount_init(&ifp->if_refcount, 1); /* Index reference. */ 470 ifnet_setbyindex(ifp->if_index, ifp); 471 return (ifp); 472 } 473 474 /* 475 * Do the actual work of freeing a struct ifnet, and layer 2 common 476 * structure. This call is made when the last reference to an 477 * interface is released. 478 */ 479 static void 480 if_free_internal(struct ifnet *ifp) 481 { 482 483 KASSERT((ifp->if_flags & IFF_DYING), 484 ("if_free_internal: interface not dying")); 485 486 if (if_com_free[ifp->if_alloctype] != NULL) 487 if_com_free[ifp->if_alloctype](ifp->if_l2com, 488 ifp->if_alloctype); 489 490 #ifdef MAC 491 mac_ifnet_destroy(ifp); 492 #endif /* MAC */ 493 if (ifp->if_description != NULL) 494 free(ifp->if_description, M_IFDESCR); 495 IF_AFDATA_DESTROY(ifp); 496 IF_ADDR_LOCK_DESTROY(ifp); 497 ifq_delete(&ifp->if_snd); 498 free(ifp, M_IFNET); 499 } 500 501 /* 502 * Deregister an interface and free the associated storage. 503 */ 504 void 505 if_free(struct ifnet *ifp) 506 { 507 508 ifp->if_flags |= IFF_DYING; /* XXX: Locking */ 509 510 CURVNET_SET_QUIET(ifp->if_vnet); 511 IFNET_WLOCK(); 512 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index), 513 ("%s: freeing unallocated ifnet", ifp->if_xname)); 514 515 ifindex_free_locked(ifp->if_index); 516 IFNET_WUNLOCK(); 517 518 if (refcount_release(&ifp->if_refcount)) 519 if_free_internal(ifp); 520 CURVNET_RESTORE(); 521 } 522 523 /* 524 * Interfaces to keep an ifnet type-stable despite the possibility of the 525 * driver calling if_free(). If there are additional references, we defer 526 * freeing the underlying data structure. 527 */ 528 void 529 if_ref(struct ifnet *ifp) 530 { 531 532 /* We don't assert the ifnet list lock here, but arguably should. */ 533 refcount_acquire(&ifp->if_refcount); 534 } 535 536 void 537 if_rele(struct ifnet *ifp) 538 { 539 540 if (!refcount_release(&ifp->if_refcount)) 541 return; 542 if_free_internal(ifp); 543 } 544 545 void 546 ifq_init(struct ifaltq *ifq, struct ifnet *ifp) 547 { 548 549 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF); 550 551 if (ifq->ifq_maxlen == 0) 552 ifq->ifq_maxlen = ifqmaxlen; 553 554 ifq->altq_type = 0; 555 ifq->altq_disc = NULL; 556 ifq->altq_flags &= ALTQF_CANTCHANGE; 557 ifq->altq_tbr = NULL; 558 ifq->altq_ifp = ifp; 559 } 560 561 void 562 ifq_delete(struct ifaltq *ifq) 563 { 564 mtx_destroy(&ifq->ifq_mtx); 565 } 566 567 /* 568 * Perform generic interface initalization tasks and attach the interface 569 * to the list of "active" interfaces. If vmove flag is set on entry 570 * to if_attach_internal(), perform only a limited subset of initialization 571 * tasks, given that we are moving from one vnet to another an ifnet which 572 * has already been fully initialized. 573 * 574 * XXX: 575 * - The decision to return void and thus require this function to 576 * succeed is questionable. 577 * - We should probably do more sanity checking. For instance we don't 578 * do anything to insure if_xname is unique or non-empty. 579 */ 580 void 581 if_attach(struct ifnet *ifp) 582 { 583 584 if_attach_internal(ifp, 0); 585 } 586 587 static void 588 if_attach_internal(struct ifnet *ifp, int vmove) 589 { 590 unsigned socksize, ifasize; 591 int namelen, masklen; 592 struct sockaddr_dl *sdl; 593 struct ifaddr *ifa; 594 595 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index)) 596 panic ("%s: BUG: if_attach called without if_alloc'd input()\n", 597 ifp->if_xname); 598 599 #ifdef VIMAGE 600 ifp->if_vnet = curvnet; 601 if (ifp->if_home_vnet == NULL) 602 ifp->if_home_vnet = curvnet; 603 #endif 604 605 if_addgroup(ifp, IFG_ALL); 606 607 getmicrotime(&ifp->if_lastchange); 608 ifp->if_epoch = time_uptime; 609 610 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) || 611 (ifp->if_transmit != NULL && ifp->if_qflush != NULL), 612 ("transmit and qflush must both either be set or both be NULL")); 613 if (ifp->if_transmit == NULL) { 614 ifp->if_transmit = if_transmit; 615 ifp->if_qflush = if_qflush; 616 } 617 618 if (ifp->if_get_counter == NULL) 619 ifp->if_get_counter = if_get_counter_compat; 620 621 if (!vmove) { 622 #ifdef MAC 623 mac_ifnet_create(ifp); 624 #endif 625 626 /* 627 * Create a Link Level name for this device. 628 */ 629 namelen = strlen(ifp->if_xname); 630 /* 631 * Always save enough space for any possiable name so we 632 * can do a rename in place later. 633 */ 634 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ; 635 socksize = masklen + ifp->if_addrlen; 636 if (socksize < sizeof(*sdl)) 637 socksize = sizeof(*sdl); 638 socksize = roundup2(socksize, sizeof(long)); 639 ifasize = sizeof(*ifa) + 2 * socksize; 640 ifa = ifa_alloc(ifasize, M_WAITOK); 641 sdl = (struct sockaddr_dl *)(ifa + 1); 642 sdl->sdl_len = socksize; 643 sdl->sdl_family = AF_LINK; 644 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 645 sdl->sdl_nlen = namelen; 646 sdl->sdl_index = ifp->if_index; 647 sdl->sdl_type = ifp->if_type; 648 ifp->if_addr = ifa; 649 ifa->ifa_ifp = ifp; 650 ifa->ifa_rtrequest = link_rtrequest; 651 ifa->ifa_addr = (struct sockaddr *)sdl; 652 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 653 ifa->ifa_netmask = (struct sockaddr *)sdl; 654 sdl->sdl_len = masklen; 655 while (namelen != 0) 656 sdl->sdl_data[--namelen] = 0xff; 657 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link); 658 /* Reliably crash if used uninitialized. */ 659 ifp->if_broadcastaddr = NULL; 660 661 #if defined(INET) || defined(INET6) 662 /* Initialize to max value. */ 663 if (ifp->if_hw_tsomax == 0) 664 ifp->if_hw_tsomax = min(IP_MAXPACKET, 32 * MCLBYTES - 665 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN)); 666 KASSERT(ifp->if_hw_tsomax <= IP_MAXPACKET && 667 ifp->if_hw_tsomax >= IP_MAXPACKET / 8, 668 ("%s: tsomax outside of range", __func__)); 669 #endif 670 } 671 #ifdef VIMAGE 672 else { 673 /* 674 * Update the interface index in the link layer address 675 * of the interface. 676 */ 677 for (ifa = ifp->if_addr; ifa != NULL; 678 ifa = TAILQ_NEXT(ifa, ifa_link)) { 679 if (ifa->ifa_addr->sa_family == AF_LINK) { 680 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 681 sdl->sdl_index = ifp->if_index; 682 } 683 } 684 } 685 #endif 686 687 IFNET_WLOCK(); 688 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link); 689 #ifdef VIMAGE 690 curvnet->vnet_ifcnt++; 691 #endif 692 IFNET_WUNLOCK(); 693 694 if (domain_init_status >= 2) 695 if_attachdomain1(ifp); 696 697 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 698 if (IS_DEFAULT_VNET(curvnet)) 699 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 700 701 /* Announce the interface. */ 702 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 703 } 704 705 static void 706 if_attachdomain(void *dummy) 707 { 708 struct ifnet *ifp; 709 710 TAILQ_FOREACH(ifp, &V_ifnet, if_link) 711 if_attachdomain1(ifp); 712 } 713 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND, 714 if_attachdomain, NULL); 715 716 static void 717 if_attachdomain1(struct ifnet *ifp) 718 { 719 struct domain *dp; 720 721 /* 722 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we 723 * cannot lock ifp->if_afdata initialization, entirely. 724 */ 725 if (IF_AFDATA_TRYLOCK(ifp) == 0) 726 return; 727 if (ifp->if_afdata_initialized >= domain_init_status) { 728 IF_AFDATA_UNLOCK(ifp); 729 log(LOG_WARNING, "%s called more than once on %s\n", 730 __func__, ifp->if_xname); 731 return; 732 } 733 ifp->if_afdata_initialized = domain_init_status; 734 IF_AFDATA_UNLOCK(ifp); 735 736 /* address family dependent data region */ 737 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 738 for (dp = domains; dp; dp = dp->dom_next) { 739 if (dp->dom_ifattach) 740 ifp->if_afdata[dp->dom_family] = 741 (*dp->dom_ifattach)(ifp); 742 } 743 } 744 745 /* 746 * Remove any unicast or broadcast network addresses from an interface. 747 */ 748 void 749 if_purgeaddrs(struct ifnet *ifp) 750 { 751 struct ifaddr *ifa, *next; 752 753 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) { 754 if (ifa->ifa_addr->sa_family == AF_LINK) 755 continue; 756 #ifdef INET 757 /* XXX: Ugly!! ad hoc just for INET */ 758 if (ifa->ifa_addr->sa_family == AF_INET) { 759 struct ifaliasreq ifr; 760 761 bzero(&ifr, sizeof(ifr)); 762 ifr.ifra_addr = *ifa->ifa_addr; 763 if (ifa->ifa_dstaddr) 764 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 765 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 766 NULL) == 0) 767 continue; 768 } 769 #endif /* INET */ 770 #ifdef INET6 771 if (ifa->ifa_addr->sa_family == AF_INET6) { 772 in6_purgeaddr(ifa); 773 /* ifp_addrhead is already updated */ 774 continue; 775 } 776 #endif /* INET6 */ 777 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 778 ifa_free(ifa); 779 } 780 } 781 782 /* 783 * Remove any multicast network addresses from an interface when an ifnet 784 * is going away. 785 */ 786 static void 787 if_purgemaddrs(struct ifnet *ifp) 788 { 789 struct ifmultiaddr *ifma; 790 struct ifmultiaddr *next; 791 792 IF_ADDR_WLOCK(ifp); 793 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 794 if_delmulti_locked(ifp, ifma, 1); 795 IF_ADDR_WUNLOCK(ifp); 796 } 797 798 /* 799 * Detach an interface, removing it from the list of "active" interfaces. 800 * If vmove flag is set on entry to if_detach_internal(), perform only a 801 * limited subset of cleanup tasks, given that we are moving an ifnet from 802 * one vnet to another, where it must be fully operational. 803 * 804 * XXXRW: There are some significant questions about event ordering, and 805 * how to prevent things from starting to use the interface during detach. 806 */ 807 void 808 if_detach(struct ifnet *ifp) 809 { 810 811 CURVNET_SET_QUIET(ifp->if_vnet); 812 if_detach_internal(ifp, 0); 813 CURVNET_RESTORE(); 814 } 815 816 static void 817 if_detach_internal(struct ifnet *ifp, int vmove) 818 { 819 struct ifaddr *ifa; 820 struct radix_node_head *rnh; 821 int i, j; 822 struct domain *dp; 823 struct ifnet *iter; 824 int found = 0; 825 826 IFNET_WLOCK(); 827 TAILQ_FOREACH(iter, &V_ifnet, if_link) 828 if (iter == ifp) { 829 TAILQ_REMOVE(&V_ifnet, ifp, if_link); 830 found = 1; 831 break; 832 } 833 #ifdef VIMAGE 834 if (found) 835 curvnet->vnet_ifcnt--; 836 #endif 837 IFNET_WUNLOCK(); 838 if (!found) { 839 if (vmove) 840 panic("%s: ifp=%p not on the ifnet tailq %p", 841 __func__, ifp, &V_ifnet); 842 else 843 return; /* XXX this should panic as well? */ 844 } 845 846 /* 847 * Remove/wait for pending events. 848 */ 849 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 850 851 /* 852 * Remove routes and flush queues. 853 */ 854 if_down(ifp); 855 #ifdef ALTQ 856 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 857 altq_disable(&ifp->if_snd); 858 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 859 altq_detach(&ifp->if_snd); 860 #endif 861 862 if_purgeaddrs(ifp); 863 864 #ifdef INET 865 in_ifdetach(ifp); 866 #endif 867 868 #ifdef INET6 869 /* 870 * Remove all IPv6 kernel structs related to ifp. This should be done 871 * before removing routing entries below, since IPv6 interface direct 872 * routes are expected to be removed by the IPv6-specific kernel API. 873 * Otherwise, the kernel will detect some inconsistency and bark it. 874 */ 875 in6_ifdetach(ifp); 876 #endif 877 if_purgemaddrs(ifp); 878 879 /* Announce that the interface is gone. */ 880 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 881 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 882 if (IS_DEFAULT_VNET(curvnet)) 883 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 884 885 if (!vmove) { 886 /* 887 * Prevent further calls into the device driver via ifnet. 888 */ 889 if_dead(ifp); 890 891 /* 892 * Remove link ifaddr pointer and maybe decrement if_index. 893 * Clean up all addresses. 894 */ 895 ifp->if_addr = NULL; 896 897 /* We can now free link ifaddr. */ 898 if (!TAILQ_EMPTY(&ifp->if_addrhead)) { 899 ifa = TAILQ_FIRST(&ifp->if_addrhead); 900 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 901 ifa_free(ifa); 902 } 903 } 904 905 /* 906 * Delete all remaining routes using this interface 907 * Unfortuneatly the only way to do this is to slog through 908 * the entire routing table looking for routes which point 909 * to this interface...oh well... 910 */ 911 for (i = 1; i <= AF_MAX; i++) { 912 for (j = 0; j < rt_numfibs; j++) { 913 rnh = rt_tables_get_rnh(j, i); 914 if (rnh == NULL) 915 continue; 916 RADIX_NODE_HEAD_LOCK(rnh); 917 (void) rnh->rnh_walktree(rnh, if_rtdel, ifp); 918 RADIX_NODE_HEAD_UNLOCK(rnh); 919 } 920 } 921 922 if_delgroups(ifp); 923 924 /* 925 * We cannot hold the lock over dom_ifdetach calls as they might 926 * sleep, for example trying to drain a callout, thus open up the 927 * theoretical race with re-attaching. 928 */ 929 IF_AFDATA_LOCK(ifp); 930 i = ifp->if_afdata_initialized; 931 ifp->if_afdata_initialized = 0; 932 IF_AFDATA_UNLOCK(ifp); 933 for (dp = domains; i > 0 && dp; dp = dp->dom_next) { 934 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 935 (*dp->dom_ifdetach)(ifp, 936 ifp->if_afdata[dp->dom_family]); 937 } 938 } 939 940 #ifdef VIMAGE 941 /* 942 * if_vmove() performs a limited version of if_detach() in current 943 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg. 944 * An attempt is made to shrink if_index in current vnet, find an 945 * unused if_index in target vnet and calls if_grow() if necessary, 946 * and finally find an unused if_xname for the target vnet. 947 */ 948 void 949 if_vmove(struct ifnet *ifp, struct vnet *new_vnet) 950 { 951 u_short idx; 952 953 /* 954 * Detach from current vnet, but preserve LLADDR info, do not 955 * mark as dead etc. so that the ifnet can be reattached later. 956 */ 957 if_detach_internal(ifp, 1); 958 959 /* 960 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink 961 * the if_index for that vnet if possible. 962 * 963 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized, 964 * or we'd lock on one vnet and unlock on another. 965 */ 966 IFNET_WLOCK(); 967 ifindex_free_locked(ifp->if_index); 968 IFNET_WUNLOCK(); 969 970 /* 971 * Perform interface-specific reassignment tasks, if provided by 972 * the driver. 973 */ 974 if (ifp->if_reassign != NULL) 975 ifp->if_reassign(ifp, new_vnet, NULL); 976 977 /* 978 * Switch to the context of the target vnet. 979 */ 980 CURVNET_SET_QUIET(new_vnet); 981 982 IFNET_WLOCK(); 983 if (ifindex_alloc_locked(&idx) != 0) { 984 IFNET_WUNLOCK(); 985 panic("if_index overflow"); 986 } 987 ifp->if_index = idx; 988 ifnet_setbyindex_locked(ifp->if_index, ifp); 989 IFNET_WUNLOCK(); 990 991 if_attach_internal(ifp, 1); 992 993 CURVNET_RESTORE(); 994 } 995 996 /* 997 * Move an ifnet to or from another child prison/vnet, specified by the jail id. 998 */ 999 static int 1000 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid) 1001 { 1002 struct prison *pr; 1003 struct ifnet *difp; 1004 1005 /* Try to find the prison within our visibility. */ 1006 sx_slock(&allprison_lock); 1007 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1008 sx_sunlock(&allprison_lock); 1009 if (pr == NULL) 1010 return (ENXIO); 1011 prison_hold_locked(pr); 1012 mtx_unlock(&pr->pr_mtx); 1013 1014 /* Do not try to move the iface from and to the same prison. */ 1015 if (pr->pr_vnet == ifp->if_vnet) { 1016 prison_free(pr); 1017 return (EEXIST); 1018 } 1019 1020 /* Make sure the named iface does not exists in the dst. prison/vnet. */ 1021 /* XXX Lock interfaces to avoid races. */ 1022 CURVNET_SET_QUIET(pr->pr_vnet); 1023 difp = ifunit(ifname); 1024 CURVNET_RESTORE(); 1025 if (difp != NULL) { 1026 prison_free(pr); 1027 return (EEXIST); 1028 } 1029 1030 /* Move the interface into the child jail/vnet. */ 1031 if_vmove(ifp, pr->pr_vnet); 1032 1033 /* Report the new if_xname back to the userland. */ 1034 sprintf(ifname, "%s", ifp->if_xname); 1035 1036 prison_free(pr); 1037 return (0); 1038 } 1039 1040 static int 1041 if_vmove_reclaim(struct thread *td, char *ifname, int jid) 1042 { 1043 struct prison *pr; 1044 struct vnet *vnet_dst; 1045 struct ifnet *ifp; 1046 1047 /* Try to find the prison within our visibility. */ 1048 sx_slock(&allprison_lock); 1049 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1050 sx_sunlock(&allprison_lock); 1051 if (pr == NULL) 1052 return (ENXIO); 1053 prison_hold_locked(pr); 1054 mtx_unlock(&pr->pr_mtx); 1055 1056 /* Make sure the named iface exists in the source prison/vnet. */ 1057 CURVNET_SET(pr->pr_vnet); 1058 ifp = ifunit(ifname); /* XXX Lock to avoid races. */ 1059 if (ifp == NULL) { 1060 CURVNET_RESTORE(); 1061 prison_free(pr); 1062 return (ENXIO); 1063 } 1064 1065 /* Do not try to move the iface from and to the same prison. */ 1066 vnet_dst = TD_TO_VNET(td); 1067 if (vnet_dst == ifp->if_vnet) { 1068 CURVNET_RESTORE(); 1069 prison_free(pr); 1070 return (EEXIST); 1071 } 1072 1073 /* Get interface back from child jail/vnet. */ 1074 if_vmove(ifp, vnet_dst); 1075 CURVNET_RESTORE(); 1076 1077 /* Report the new if_xname back to the userland. */ 1078 sprintf(ifname, "%s", ifp->if_xname); 1079 1080 prison_free(pr); 1081 return (0); 1082 } 1083 #endif /* VIMAGE */ 1084 1085 /* 1086 * Add a group to an interface 1087 */ 1088 int 1089 if_addgroup(struct ifnet *ifp, const char *groupname) 1090 { 1091 struct ifg_list *ifgl; 1092 struct ifg_group *ifg = NULL; 1093 struct ifg_member *ifgm; 1094 int new = 0; 1095 1096 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 1097 groupname[strlen(groupname) - 1] <= '9') 1098 return (EINVAL); 1099 1100 IFNET_WLOCK(); 1101 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1102 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) { 1103 IFNET_WUNLOCK(); 1104 return (EEXIST); 1105 } 1106 1107 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP, 1108 M_NOWAIT)) == NULL) { 1109 IFNET_WUNLOCK(); 1110 return (ENOMEM); 1111 } 1112 1113 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member), 1114 M_TEMP, M_NOWAIT)) == NULL) { 1115 free(ifgl, M_TEMP); 1116 IFNET_WUNLOCK(); 1117 return (ENOMEM); 1118 } 1119 1120 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1121 if (!strcmp(ifg->ifg_group, groupname)) 1122 break; 1123 1124 if (ifg == NULL) { 1125 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group), 1126 M_TEMP, M_NOWAIT)) == NULL) { 1127 free(ifgl, M_TEMP); 1128 free(ifgm, M_TEMP); 1129 IFNET_WUNLOCK(); 1130 return (ENOMEM); 1131 } 1132 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 1133 ifg->ifg_refcnt = 0; 1134 TAILQ_INIT(&ifg->ifg_members); 1135 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next); 1136 new = 1; 1137 } 1138 1139 ifg->ifg_refcnt++; 1140 ifgl->ifgl_group = ifg; 1141 ifgm->ifgm_ifp = ifp; 1142 1143 IF_ADDR_WLOCK(ifp); 1144 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 1145 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 1146 IF_ADDR_WUNLOCK(ifp); 1147 1148 IFNET_WUNLOCK(); 1149 1150 if (new) 1151 EVENTHANDLER_INVOKE(group_attach_event, ifg); 1152 EVENTHANDLER_INVOKE(group_change_event, groupname); 1153 1154 return (0); 1155 } 1156 1157 /* 1158 * Remove a group from an interface 1159 */ 1160 int 1161 if_delgroup(struct ifnet *ifp, const char *groupname) 1162 { 1163 struct ifg_list *ifgl; 1164 struct ifg_member *ifgm; 1165 1166 IFNET_WLOCK(); 1167 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1168 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1169 break; 1170 if (ifgl == NULL) { 1171 IFNET_WUNLOCK(); 1172 return (ENOENT); 1173 } 1174 1175 IF_ADDR_WLOCK(ifp); 1176 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1177 IF_ADDR_WUNLOCK(ifp); 1178 1179 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1180 if (ifgm->ifgm_ifp == ifp) 1181 break; 1182 1183 if (ifgm != NULL) { 1184 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 1185 free(ifgm, M_TEMP); 1186 } 1187 1188 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1189 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1190 IFNET_WUNLOCK(); 1191 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group); 1192 free(ifgl->ifgl_group, M_TEMP); 1193 } else 1194 IFNET_WUNLOCK(); 1195 1196 free(ifgl, M_TEMP); 1197 1198 EVENTHANDLER_INVOKE(group_change_event, groupname); 1199 1200 return (0); 1201 } 1202 1203 /* 1204 * Remove an interface from all groups 1205 */ 1206 static void 1207 if_delgroups(struct ifnet *ifp) 1208 { 1209 struct ifg_list *ifgl; 1210 struct ifg_member *ifgm; 1211 char groupname[IFNAMSIZ]; 1212 1213 IFNET_WLOCK(); 1214 while (!TAILQ_EMPTY(&ifp->if_groups)) { 1215 ifgl = TAILQ_FIRST(&ifp->if_groups); 1216 1217 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ); 1218 1219 IF_ADDR_WLOCK(ifp); 1220 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1221 IF_ADDR_WUNLOCK(ifp); 1222 1223 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1224 if (ifgm->ifgm_ifp == ifp) 1225 break; 1226 1227 if (ifgm != NULL) { 1228 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, 1229 ifgm_next); 1230 free(ifgm, M_TEMP); 1231 } 1232 1233 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1234 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1235 IFNET_WUNLOCK(); 1236 EVENTHANDLER_INVOKE(group_detach_event, 1237 ifgl->ifgl_group); 1238 free(ifgl->ifgl_group, M_TEMP); 1239 } else 1240 IFNET_WUNLOCK(); 1241 1242 free(ifgl, M_TEMP); 1243 1244 EVENTHANDLER_INVOKE(group_change_event, groupname); 1245 1246 IFNET_WLOCK(); 1247 } 1248 IFNET_WUNLOCK(); 1249 } 1250 1251 /* 1252 * Stores all groups from an interface in memory pointed 1253 * to by data 1254 */ 1255 static int 1256 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp) 1257 { 1258 int len, error; 1259 struct ifg_list *ifgl; 1260 struct ifg_req ifgrq, *ifgp; 1261 struct ifgroupreq *ifgr = data; 1262 1263 if (ifgr->ifgr_len == 0) { 1264 IF_ADDR_RLOCK(ifp); 1265 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1266 ifgr->ifgr_len += sizeof(struct ifg_req); 1267 IF_ADDR_RUNLOCK(ifp); 1268 return (0); 1269 } 1270 1271 len = ifgr->ifgr_len; 1272 ifgp = ifgr->ifgr_groups; 1273 /* XXX: wire */ 1274 IF_ADDR_RLOCK(ifp); 1275 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 1276 if (len < sizeof(ifgrq)) { 1277 IF_ADDR_RUNLOCK(ifp); 1278 return (EINVAL); 1279 } 1280 bzero(&ifgrq, sizeof ifgrq); 1281 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 1282 sizeof(ifgrq.ifgrq_group)); 1283 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1284 IF_ADDR_RUNLOCK(ifp); 1285 return (error); 1286 } 1287 len -= sizeof(ifgrq); 1288 ifgp++; 1289 } 1290 IF_ADDR_RUNLOCK(ifp); 1291 1292 return (0); 1293 } 1294 1295 /* 1296 * Stores all members of a group in memory pointed to by data 1297 */ 1298 static int 1299 if_getgroupmembers(struct ifgroupreq *data) 1300 { 1301 struct ifgroupreq *ifgr = data; 1302 struct ifg_group *ifg; 1303 struct ifg_member *ifgm; 1304 struct ifg_req ifgrq, *ifgp; 1305 int len, error; 1306 1307 IFNET_RLOCK(); 1308 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1309 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 1310 break; 1311 if (ifg == NULL) { 1312 IFNET_RUNLOCK(); 1313 return (ENOENT); 1314 } 1315 1316 if (ifgr->ifgr_len == 0) { 1317 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1318 ifgr->ifgr_len += sizeof(ifgrq); 1319 IFNET_RUNLOCK(); 1320 return (0); 1321 } 1322 1323 len = ifgr->ifgr_len; 1324 ifgp = ifgr->ifgr_groups; 1325 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1326 if (len < sizeof(ifgrq)) { 1327 IFNET_RUNLOCK(); 1328 return (EINVAL); 1329 } 1330 bzero(&ifgrq, sizeof ifgrq); 1331 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1332 sizeof(ifgrq.ifgrq_member)); 1333 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1334 IFNET_RUNLOCK(); 1335 return (error); 1336 } 1337 len -= sizeof(ifgrq); 1338 ifgp++; 1339 } 1340 IFNET_RUNLOCK(); 1341 1342 return (0); 1343 } 1344 1345 /* 1346 * Delete Routes for a Network Interface 1347 * 1348 * Called for each routing entry via the rnh->rnh_walktree() call above 1349 * to delete all route entries referencing a detaching network interface. 1350 * 1351 * Arguments: 1352 * rn pointer to node in the routing table 1353 * arg argument passed to rnh->rnh_walktree() - detaching interface 1354 * 1355 * Returns: 1356 * 0 successful 1357 * errno failed - reason indicated 1358 * 1359 */ 1360 static int 1361 if_rtdel(struct radix_node *rn, void *arg) 1362 { 1363 struct rtentry *rt = (struct rtentry *)rn; 1364 struct ifnet *ifp = arg; 1365 int err; 1366 1367 if (rt->rt_ifp == ifp) { 1368 1369 /* 1370 * Protect (sorta) against walktree recursion problems 1371 * with cloned routes 1372 */ 1373 if ((rt->rt_flags & RTF_UP) == 0) 1374 return (0); 1375 1376 err = rtrequest_fib(RTM_DELETE, rt_key(rt), rt->rt_gateway, 1377 rt_mask(rt), 1378 rt->rt_flags|RTF_RNH_LOCKED|RTF_PINNED, 1379 (struct rtentry **) NULL, rt->rt_fibnum); 1380 if (err) { 1381 log(LOG_WARNING, "if_rtdel: error %d\n", err); 1382 } 1383 } 1384 1385 return (0); 1386 } 1387 1388 /* 1389 * Return counter values from old racy non-pcpu counters. 1390 */ 1391 uint64_t 1392 if_get_counter_compat(struct ifnet *ifp, ifnet_counter cnt) 1393 { 1394 1395 switch (cnt) { 1396 case IFCOUNTER_IPACKETS: 1397 return (ifp->if_ipackets); 1398 case IFCOUNTER_IERRORS: 1399 return (ifp->if_ierrors); 1400 case IFCOUNTER_OPACKETS: 1401 return (ifp->if_opackets); 1402 case IFCOUNTER_OERRORS: 1403 return (ifp->if_oerrors); 1404 case IFCOUNTER_COLLISIONS: 1405 return (ifp->if_collisions); 1406 case IFCOUNTER_IBYTES: 1407 return (ifp->if_ibytes); 1408 case IFCOUNTER_OBYTES: 1409 return (ifp->if_obytes); 1410 case IFCOUNTER_IMCASTS: 1411 return (ifp->if_imcasts); 1412 case IFCOUNTER_OMCASTS: 1413 return (ifp->if_omcasts); 1414 case IFCOUNTER_IQDROPS: 1415 return (ifp->if_iqdrops); 1416 case IFCOUNTER_OQDROPS: 1417 return (ifp->if_oqdrops); 1418 case IFCOUNTER_NOPROTO: 1419 return (ifp->if_noproto); 1420 } 1421 panic("%s: unknown counter %d", __func__, cnt); 1422 } 1423 1424 /* 1425 * Copy data from ifnet to userland API structure if_data. 1426 */ 1427 void 1428 if_data_copy(struct ifnet *ifp, struct if_data *ifd) 1429 { 1430 1431 ifd->ifi_type = ifp->if_type; 1432 ifd->ifi_physical = 0; 1433 ifd->ifi_addrlen = ifp->if_addrlen; 1434 ifd->ifi_hdrlen = ifp->if_hdrlen; 1435 ifd->ifi_link_state = ifp->if_link_state; 1436 ifd->ifi_vhid = 0; 1437 ifd->ifi_datalen = sizeof(struct if_data); 1438 ifd->ifi_mtu = ifp->if_mtu; 1439 ifd->ifi_metric = ifp->if_metric; 1440 ifd->ifi_baudrate = ifp->if_baudrate; 1441 ifd->ifi_hwassist = ifp->if_hwassist; 1442 ifd->ifi_epoch = ifp->if_epoch; 1443 ifd->ifi_lastchange = ifp->if_lastchange; 1444 1445 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS); 1446 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS); 1447 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS); 1448 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS); 1449 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS); 1450 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES); 1451 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES); 1452 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS); 1453 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS); 1454 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS); 1455 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS); 1456 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO); 1457 } 1458 1459 /* 1460 * Wrapper functions for struct ifnet address list locking macros. These are 1461 * used by kernel modules to avoid encoding programming interface or binary 1462 * interface assumptions that may be violated when kernel-internal locking 1463 * approaches change. 1464 */ 1465 void 1466 if_addr_rlock(struct ifnet *ifp) 1467 { 1468 1469 IF_ADDR_RLOCK(ifp); 1470 } 1471 1472 void 1473 if_addr_runlock(struct ifnet *ifp) 1474 { 1475 1476 IF_ADDR_RUNLOCK(ifp); 1477 } 1478 1479 void 1480 if_maddr_rlock(if_t ifp) 1481 { 1482 1483 IF_ADDR_RLOCK((struct ifnet *)ifp); 1484 } 1485 1486 void 1487 if_maddr_runlock(if_t ifp) 1488 { 1489 1490 IF_ADDR_RUNLOCK((struct ifnet *)ifp); 1491 } 1492 1493 /* 1494 * Initialization, destruction and refcounting functions for ifaddrs. 1495 */ 1496 struct ifaddr * 1497 ifa_alloc(size_t size, int flags) 1498 { 1499 struct ifaddr *ifa; 1500 1501 KASSERT(size >= sizeof(struct ifaddr), 1502 ("%s: invalid size %zu", __func__, size)); 1503 1504 ifa = malloc(size, M_IFADDR, M_ZERO | flags); 1505 if (ifa == NULL) 1506 return (NULL); 1507 1508 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL) 1509 goto fail; 1510 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL) 1511 goto fail; 1512 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL) 1513 goto fail; 1514 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL) 1515 goto fail; 1516 1517 refcount_init(&ifa->ifa_refcnt, 1); 1518 1519 return (ifa); 1520 1521 fail: 1522 /* free(NULL) is okay */ 1523 counter_u64_free(ifa->ifa_opackets); 1524 counter_u64_free(ifa->ifa_ipackets); 1525 counter_u64_free(ifa->ifa_obytes); 1526 counter_u64_free(ifa->ifa_ibytes); 1527 free(ifa, M_IFADDR); 1528 1529 return (NULL); 1530 } 1531 1532 void 1533 ifa_ref(struct ifaddr *ifa) 1534 { 1535 1536 refcount_acquire(&ifa->ifa_refcnt); 1537 } 1538 1539 void 1540 ifa_free(struct ifaddr *ifa) 1541 { 1542 1543 if (refcount_release(&ifa->ifa_refcnt)) { 1544 counter_u64_free(ifa->ifa_opackets); 1545 counter_u64_free(ifa->ifa_ipackets); 1546 counter_u64_free(ifa->ifa_obytes); 1547 counter_u64_free(ifa->ifa_ibytes); 1548 free(ifa, M_IFADDR); 1549 } 1550 } 1551 1552 int 1553 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1554 { 1555 int error = 0; 1556 struct rtentry *rt = NULL; 1557 struct rt_addrinfo info; 1558 static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK}; 1559 1560 bzero(&info, sizeof(info)); 1561 info.rti_ifp = V_loif; 1562 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; 1563 info.rti_info[RTAX_DST] = ia; 1564 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1565 error = rtrequest1_fib(RTM_ADD, &info, &rt, ifa->ifa_ifp->if_fib); 1566 1567 if (error == 0 && rt != NULL) { 1568 RT_LOCK(rt); 1569 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type = 1570 ifa->ifa_ifp->if_type; 1571 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index = 1572 ifa->ifa_ifp->if_index; 1573 RT_REMREF(rt); 1574 RT_UNLOCK(rt); 1575 } else if (error != 0) 1576 log(LOG_DEBUG, "%s: insertion failed: %u\n", __func__, error); 1577 1578 return (error); 1579 } 1580 1581 int 1582 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1583 { 1584 int error = 0; 1585 struct rt_addrinfo info; 1586 struct sockaddr_dl null_sdl; 1587 1588 bzero(&null_sdl, sizeof(null_sdl)); 1589 null_sdl.sdl_len = sizeof(null_sdl); 1590 null_sdl.sdl_family = AF_LINK; 1591 null_sdl.sdl_type = ifa->ifa_ifp->if_type; 1592 null_sdl.sdl_index = ifa->ifa_ifp->if_index; 1593 bzero(&info, sizeof(info)); 1594 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; 1595 info.rti_info[RTAX_DST] = ia; 1596 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1597 error = rtrequest1_fib(RTM_DELETE, &info, NULL, ifa->ifa_ifp->if_fib); 1598 1599 if (error != 0) 1600 log(LOG_DEBUG, "%s: deletion failed: %u\n", __func__, error); 1601 1602 return (error); 1603 } 1604 1605 int 1606 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *sa, int fib) 1607 { 1608 struct rtentry *rt; 1609 1610 rt = rtalloc1_fib(sa, 0, 0, fib); 1611 if (rt == NULL) { 1612 log(LOG_DEBUG, "%s: fail", __func__); 1613 return (EHOSTUNREACH); 1614 } 1615 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type = 1616 ifa->ifa_ifp->if_type; 1617 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index = 1618 ifa->ifa_ifp->if_index; 1619 RTFREE_LOCKED(rt); 1620 1621 return (0); 1622 } 1623 1624 /* 1625 * XXX: Because sockaddr_dl has deeper structure than the sockaddr 1626 * structs used to represent other address families, it is necessary 1627 * to perform a different comparison. 1628 */ 1629 1630 #define sa_dl_equal(a1, a2) \ 1631 ((((struct sockaddr_dl *)(a1))->sdl_len == \ 1632 ((struct sockaddr_dl *)(a2))->sdl_len) && \ 1633 (bcmp(LLADDR((struct sockaddr_dl *)(a1)), \ 1634 LLADDR((struct sockaddr_dl *)(a2)), \ 1635 ((struct sockaddr_dl *)(a1))->sdl_alen) == 0)) 1636 1637 /* 1638 * Locate an interface based on a complete address. 1639 */ 1640 /*ARGSUSED*/ 1641 static struct ifaddr * 1642 ifa_ifwithaddr_internal(struct sockaddr *addr, int getref) 1643 { 1644 struct ifnet *ifp; 1645 struct ifaddr *ifa; 1646 1647 IFNET_RLOCK_NOSLEEP(); 1648 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1649 IF_ADDR_RLOCK(ifp); 1650 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1651 if (ifa->ifa_addr->sa_family != addr->sa_family) 1652 continue; 1653 if (sa_equal(addr, ifa->ifa_addr)) { 1654 if (getref) 1655 ifa_ref(ifa); 1656 IF_ADDR_RUNLOCK(ifp); 1657 goto done; 1658 } 1659 /* IP6 doesn't have broadcast */ 1660 if ((ifp->if_flags & IFF_BROADCAST) && 1661 ifa->ifa_broadaddr && 1662 ifa->ifa_broadaddr->sa_len != 0 && 1663 sa_equal(ifa->ifa_broadaddr, addr)) { 1664 if (getref) 1665 ifa_ref(ifa); 1666 IF_ADDR_RUNLOCK(ifp); 1667 goto done; 1668 } 1669 } 1670 IF_ADDR_RUNLOCK(ifp); 1671 } 1672 ifa = NULL; 1673 done: 1674 IFNET_RUNLOCK_NOSLEEP(); 1675 return (ifa); 1676 } 1677 1678 struct ifaddr * 1679 ifa_ifwithaddr(struct sockaddr *addr) 1680 { 1681 1682 return (ifa_ifwithaddr_internal(addr, 1)); 1683 } 1684 1685 int 1686 ifa_ifwithaddr_check(struct sockaddr *addr) 1687 { 1688 1689 return (ifa_ifwithaddr_internal(addr, 0) != NULL); 1690 } 1691 1692 /* 1693 * Locate an interface based on the broadcast address. 1694 */ 1695 /* ARGSUSED */ 1696 struct ifaddr * 1697 ifa_ifwithbroadaddr(struct sockaddr *addr, int fibnum) 1698 { 1699 struct ifnet *ifp; 1700 struct ifaddr *ifa; 1701 1702 IFNET_RLOCK_NOSLEEP(); 1703 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1704 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1705 continue; 1706 IF_ADDR_RLOCK(ifp); 1707 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1708 if (ifa->ifa_addr->sa_family != addr->sa_family) 1709 continue; 1710 if ((ifp->if_flags & IFF_BROADCAST) && 1711 ifa->ifa_broadaddr && 1712 ifa->ifa_broadaddr->sa_len != 0 && 1713 sa_equal(ifa->ifa_broadaddr, addr)) { 1714 ifa_ref(ifa); 1715 IF_ADDR_RUNLOCK(ifp); 1716 goto done; 1717 } 1718 } 1719 IF_ADDR_RUNLOCK(ifp); 1720 } 1721 ifa = NULL; 1722 done: 1723 IFNET_RUNLOCK_NOSLEEP(); 1724 return (ifa); 1725 } 1726 1727 /* 1728 * Locate the point to point interface with a given destination address. 1729 */ 1730 /*ARGSUSED*/ 1731 struct ifaddr * 1732 ifa_ifwithdstaddr(struct sockaddr *addr, int fibnum) 1733 { 1734 struct ifnet *ifp; 1735 struct ifaddr *ifa; 1736 1737 IFNET_RLOCK_NOSLEEP(); 1738 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1739 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1740 continue; 1741 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1742 continue; 1743 IF_ADDR_RLOCK(ifp); 1744 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1745 if (ifa->ifa_addr->sa_family != addr->sa_family) 1746 continue; 1747 if (ifa->ifa_dstaddr != NULL && 1748 sa_equal(addr, ifa->ifa_dstaddr)) { 1749 ifa_ref(ifa); 1750 IF_ADDR_RUNLOCK(ifp); 1751 goto done; 1752 } 1753 } 1754 IF_ADDR_RUNLOCK(ifp); 1755 } 1756 ifa = NULL; 1757 done: 1758 IFNET_RUNLOCK_NOSLEEP(); 1759 return (ifa); 1760 } 1761 1762 /* 1763 * Find an interface on a specific network. If many, choice 1764 * is most specific found. 1765 */ 1766 struct ifaddr * 1767 ifa_ifwithnet(struct sockaddr *addr, int ignore_ptp, int fibnum) 1768 { 1769 struct ifnet *ifp; 1770 struct ifaddr *ifa; 1771 struct ifaddr *ifa_maybe = NULL; 1772 u_int af = addr->sa_family; 1773 char *addr_data = addr->sa_data, *cplim; 1774 1775 /* 1776 * AF_LINK addresses can be looked up directly by their index number, 1777 * so do that if we can. 1778 */ 1779 if (af == AF_LINK) { 1780 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; 1781 if (sdl->sdl_index && sdl->sdl_index <= V_if_index) 1782 return (ifaddr_byindex(sdl->sdl_index)); 1783 } 1784 1785 /* 1786 * Scan though each interface, looking for ones that have addresses 1787 * in this address family and the requested fib. Maintain a reference 1788 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that 1789 * kept it stable when we move onto the next interface. 1790 */ 1791 IFNET_RLOCK_NOSLEEP(); 1792 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1793 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1794 continue; 1795 IF_ADDR_RLOCK(ifp); 1796 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1797 char *cp, *cp2, *cp3; 1798 1799 if (ifa->ifa_addr->sa_family != af) 1800 next: continue; 1801 if (af == AF_INET && 1802 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) { 1803 /* 1804 * This is a bit broken as it doesn't 1805 * take into account that the remote end may 1806 * be a single node in the network we are 1807 * looking for. 1808 * The trouble is that we don't know the 1809 * netmask for the remote end. 1810 */ 1811 if (ifa->ifa_dstaddr != NULL && 1812 sa_equal(addr, ifa->ifa_dstaddr)) { 1813 ifa_ref(ifa); 1814 IF_ADDR_RUNLOCK(ifp); 1815 goto done; 1816 } 1817 } else { 1818 /* 1819 * Scan all the bits in the ifa's address. 1820 * If a bit dissagrees with what we are 1821 * looking for, mask it with the netmask 1822 * to see if it really matters. 1823 * (A byte at a time) 1824 */ 1825 if (ifa->ifa_netmask == 0) 1826 continue; 1827 cp = addr_data; 1828 cp2 = ifa->ifa_addr->sa_data; 1829 cp3 = ifa->ifa_netmask->sa_data; 1830 cplim = ifa->ifa_netmask->sa_len 1831 + (char *)ifa->ifa_netmask; 1832 while (cp3 < cplim) 1833 if ((*cp++ ^ *cp2++) & *cp3++) 1834 goto next; /* next address! */ 1835 /* 1836 * If the netmask of what we just found 1837 * is more specific than what we had before 1838 * (if we had one), or if the virtual status 1839 * of new prefix is better than of the old one, 1840 * then remember the new one before continuing 1841 * to search for an even better one. 1842 */ 1843 if (ifa_maybe == NULL || 1844 ifa_preferred(ifa_maybe, ifa) || 1845 rn_refines((caddr_t)ifa->ifa_netmask, 1846 (caddr_t)ifa_maybe->ifa_netmask)) { 1847 if (ifa_maybe != NULL) 1848 ifa_free(ifa_maybe); 1849 ifa_maybe = ifa; 1850 ifa_ref(ifa_maybe); 1851 } 1852 } 1853 } 1854 IF_ADDR_RUNLOCK(ifp); 1855 } 1856 ifa = ifa_maybe; 1857 ifa_maybe = NULL; 1858 done: 1859 IFNET_RUNLOCK_NOSLEEP(); 1860 if (ifa_maybe != NULL) 1861 ifa_free(ifa_maybe); 1862 return (ifa); 1863 } 1864 1865 /* 1866 * Find an interface address specific to an interface best matching 1867 * a given address. 1868 */ 1869 struct ifaddr * 1870 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp) 1871 { 1872 struct ifaddr *ifa; 1873 char *cp, *cp2, *cp3; 1874 char *cplim; 1875 struct ifaddr *ifa_maybe = NULL; 1876 u_int af = addr->sa_family; 1877 1878 if (af >= AF_MAX) 1879 return (NULL); 1880 IF_ADDR_RLOCK(ifp); 1881 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1882 if (ifa->ifa_addr->sa_family != af) 1883 continue; 1884 if (ifa_maybe == NULL) 1885 ifa_maybe = ifa; 1886 if (ifa->ifa_netmask == 0) { 1887 if (sa_equal(addr, ifa->ifa_addr) || 1888 (ifa->ifa_dstaddr && 1889 sa_equal(addr, ifa->ifa_dstaddr))) 1890 goto done; 1891 continue; 1892 } 1893 if (ifp->if_flags & IFF_POINTOPOINT) { 1894 if (sa_equal(addr, ifa->ifa_dstaddr)) 1895 goto done; 1896 } else { 1897 cp = addr->sa_data; 1898 cp2 = ifa->ifa_addr->sa_data; 1899 cp3 = ifa->ifa_netmask->sa_data; 1900 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1901 for (; cp3 < cplim; cp3++) 1902 if ((*cp++ ^ *cp2++) & *cp3) 1903 break; 1904 if (cp3 == cplim) 1905 goto done; 1906 } 1907 } 1908 ifa = ifa_maybe; 1909 done: 1910 if (ifa != NULL) 1911 ifa_ref(ifa); 1912 IF_ADDR_RUNLOCK(ifp); 1913 return (ifa); 1914 } 1915 1916 /* 1917 * See whether new ifa is better than current one: 1918 * 1) A non-virtual one is preferred over virtual. 1919 * 2) A virtual in master state preferred over any other state. 1920 * 1921 * Used in several address selecting functions. 1922 */ 1923 int 1924 ifa_preferred(struct ifaddr *cur, struct ifaddr *next) 1925 { 1926 1927 return (cur->ifa_carp && (!next->ifa_carp || 1928 ((*carp_master_p)(next) && !(*carp_master_p)(cur)))); 1929 } 1930 1931 #include <net/if_llatbl.h> 1932 1933 /* 1934 * Default action when installing a route with a Link Level gateway. 1935 * Lookup an appropriate real ifa to point to. 1936 * This should be moved to /sys/net/link.c eventually. 1937 */ 1938 static void 1939 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 1940 { 1941 struct ifaddr *ifa, *oifa; 1942 struct sockaddr *dst; 1943 struct ifnet *ifp; 1944 1945 RT_LOCK_ASSERT(rt); 1946 1947 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) || 1948 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0)) 1949 return; 1950 ifa = ifaof_ifpforaddr(dst, ifp); 1951 if (ifa) { 1952 oifa = rt->rt_ifa; 1953 rt->rt_ifa = ifa; 1954 ifa_free(oifa); 1955 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1956 ifa->ifa_rtrequest(cmd, rt, info); 1957 } 1958 } 1959 1960 struct sockaddr_dl * 1961 link_alloc_sdl(size_t size, int flags) 1962 { 1963 1964 return (malloc(size, M_TEMP, flags)); 1965 } 1966 1967 void 1968 link_free_sdl(struct sockaddr *sa) 1969 { 1970 free(sa, M_TEMP); 1971 } 1972 1973 /* 1974 * Fills in given sdl with interface basic info. 1975 * Returns pointer to filled sdl. 1976 */ 1977 struct sockaddr_dl * 1978 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype) 1979 { 1980 struct sockaddr_dl *sdl; 1981 1982 sdl = (struct sockaddr_dl *)paddr; 1983 memset(sdl, 0, sizeof(struct sockaddr_dl)); 1984 sdl->sdl_len = sizeof(struct sockaddr_dl); 1985 sdl->sdl_family = AF_LINK; 1986 sdl->sdl_index = ifp->if_index; 1987 sdl->sdl_type = iftype; 1988 1989 return (sdl); 1990 } 1991 1992 /* 1993 * Mark an interface down and notify protocols of 1994 * the transition. 1995 */ 1996 static void 1997 if_unroute(struct ifnet *ifp, int flag, int fam) 1998 { 1999 struct ifaddr *ifa; 2000 2001 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP")); 2002 2003 ifp->if_flags &= ~flag; 2004 getmicrotime(&ifp->if_lastchange); 2005 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2006 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2007 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 2008 ifp->if_qflush(ifp); 2009 2010 if (ifp->if_carp) 2011 (*carp_linkstate_p)(ifp); 2012 rt_ifmsg(ifp); 2013 } 2014 2015 /* 2016 * Mark an interface up and notify protocols of 2017 * the transition. 2018 */ 2019 static void 2020 if_route(struct ifnet *ifp, int flag, int fam) 2021 { 2022 struct ifaddr *ifa; 2023 2024 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP")); 2025 2026 ifp->if_flags |= flag; 2027 getmicrotime(&ifp->if_lastchange); 2028 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2029 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2030 pfctlinput(PRC_IFUP, ifa->ifa_addr); 2031 if (ifp->if_carp) 2032 (*carp_linkstate_p)(ifp); 2033 rt_ifmsg(ifp); 2034 #ifdef INET6 2035 in6_if_up(ifp); 2036 #endif 2037 } 2038 2039 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */ 2040 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */ 2041 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *); 2042 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t); 2043 int (*vlan_tag_p)(struct ifnet *, uint16_t *); 2044 int (*vlan_setcookie_p)(struct ifnet *, void *); 2045 void *(*vlan_cookie_p)(struct ifnet *); 2046 2047 /* 2048 * Handle a change in the interface link state. To avoid LORs 2049 * between driver lock and upper layer locks, as well as possible 2050 * recursions, we post event to taskqueue, and all job 2051 * is done in static do_link_state_change(). 2052 */ 2053 void 2054 if_link_state_change(struct ifnet *ifp, int link_state) 2055 { 2056 /* Return if state hasn't changed. */ 2057 if (ifp->if_link_state == link_state) 2058 return; 2059 2060 ifp->if_link_state = link_state; 2061 2062 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask); 2063 } 2064 2065 static void 2066 do_link_state_change(void *arg, int pending) 2067 { 2068 struct ifnet *ifp = (struct ifnet *)arg; 2069 int link_state = ifp->if_link_state; 2070 CURVNET_SET(ifp->if_vnet); 2071 2072 /* Notify that the link state has changed. */ 2073 rt_ifmsg(ifp); 2074 if (ifp->if_vlantrunk != NULL) 2075 (*vlan_link_state_p)(ifp); 2076 2077 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) && 2078 IFP2AC(ifp)->ac_netgraph != NULL) 2079 (*ng_ether_link_state_p)(ifp, link_state); 2080 if (ifp->if_carp) 2081 (*carp_linkstate_p)(ifp); 2082 if (ifp->if_bridge) 2083 (*bridge_linkstate_p)(ifp); 2084 if (ifp->if_lagg) 2085 (*lagg_linkstate_p)(ifp, link_state); 2086 2087 if (IS_DEFAULT_VNET(curvnet)) 2088 devctl_notify("IFNET", ifp->if_xname, 2089 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", 2090 NULL); 2091 if (pending > 1) 2092 if_printf(ifp, "%d link states coalesced\n", pending); 2093 if (log_link_state_change) 2094 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname, 2095 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" ); 2096 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, ifp->if_link_state); 2097 CURVNET_RESTORE(); 2098 } 2099 2100 /* 2101 * Mark an interface down and notify protocols of 2102 * the transition. 2103 */ 2104 void 2105 if_down(struct ifnet *ifp) 2106 { 2107 2108 if_unroute(ifp, IFF_UP, AF_UNSPEC); 2109 } 2110 2111 /* 2112 * Mark an interface up and notify protocols of 2113 * the transition. 2114 */ 2115 void 2116 if_up(struct ifnet *ifp) 2117 { 2118 2119 if_route(ifp, IFF_UP, AF_UNSPEC); 2120 } 2121 2122 /* 2123 * Flush an interface queue. 2124 */ 2125 void 2126 if_qflush(struct ifnet *ifp) 2127 { 2128 struct mbuf *m, *n; 2129 struct ifaltq *ifq; 2130 2131 ifq = &ifp->if_snd; 2132 IFQ_LOCK(ifq); 2133 #ifdef ALTQ 2134 if (ALTQ_IS_ENABLED(ifq)) 2135 ALTQ_PURGE(ifq); 2136 #endif 2137 n = ifq->ifq_head; 2138 while ((m = n) != 0) { 2139 n = m->m_nextpkt; 2140 m_freem(m); 2141 } 2142 ifq->ifq_head = 0; 2143 ifq->ifq_tail = 0; 2144 ifq->ifq_len = 0; 2145 IFQ_UNLOCK(ifq); 2146 } 2147 2148 /* 2149 * Map interface name to interface structure pointer, with or without 2150 * returning a reference. 2151 */ 2152 struct ifnet * 2153 ifunit_ref(const char *name) 2154 { 2155 struct ifnet *ifp; 2156 2157 IFNET_RLOCK_NOSLEEP(); 2158 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2159 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 && 2160 !(ifp->if_flags & IFF_DYING)) 2161 break; 2162 } 2163 if (ifp != NULL) 2164 if_ref(ifp); 2165 IFNET_RUNLOCK_NOSLEEP(); 2166 return (ifp); 2167 } 2168 2169 struct ifnet * 2170 ifunit(const char *name) 2171 { 2172 struct ifnet *ifp; 2173 2174 IFNET_RLOCK_NOSLEEP(); 2175 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2176 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0) 2177 break; 2178 } 2179 IFNET_RUNLOCK_NOSLEEP(); 2180 return (ifp); 2181 } 2182 2183 /* 2184 * Hardware specific interface ioctls. 2185 */ 2186 static int 2187 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td) 2188 { 2189 struct ifreq *ifr; 2190 int error = 0; 2191 int new_flags, temp_flags; 2192 size_t namelen, onamelen; 2193 size_t descrlen; 2194 char *descrbuf, *odescrbuf; 2195 char new_name[IFNAMSIZ]; 2196 struct ifaddr *ifa; 2197 struct sockaddr_dl *sdl; 2198 2199 ifr = (struct ifreq *)data; 2200 switch (cmd) { 2201 case SIOCGIFINDEX: 2202 ifr->ifr_index = ifp->if_index; 2203 break; 2204 2205 case SIOCGIFFLAGS: 2206 temp_flags = ifp->if_flags | ifp->if_drv_flags; 2207 ifr->ifr_flags = temp_flags & 0xffff; 2208 ifr->ifr_flagshigh = temp_flags >> 16; 2209 break; 2210 2211 case SIOCGIFCAP: 2212 ifr->ifr_reqcap = ifp->if_capabilities; 2213 ifr->ifr_curcap = ifp->if_capenable; 2214 break; 2215 2216 #ifdef MAC 2217 case SIOCGIFMAC: 2218 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp); 2219 break; 2220 #endif 2221 2222 case SIOCGIFMETRIC: 2223 ifr->ifr_metric = ifp->if_metric; 2224 break; 2225 2226 case SIOCGIFMTU: 2227 ifr->ifr_mtu = ifp->if_mtu; 2228 break; 2229 2230 case SIOCGIFPHYS: 2231 /* XXXGL: did this ever worked? */ 2232 ifr->ifr_phys = 0; 2233 break; 2234 2235 case SIOCGIFDESCR: 2236 error = 0; 2237 sx_slock(&ifdescr_sx); 2238 if (ifp->if_description == NULL) 2239 error = ENOMSG; 2240 else { 2241 /* space for terminating nul */ 2242 descrlen = strlen(ifp->if_description) + 1; 2243 if (ifr->ifr_buffer.length < descrlen) 2244 ifr->ifr_buffer.buffer = NULL; 2245 else 2246 error = copyout(ifp->if_description, 2247 ifr->ifr_buffer.buffer, descrlen); 2248 ifr->ifr_buffer.length = descrlen; 2249 } 2250 sx_sunlock(&ifdescr_sx); 2251 break; 2252 2253 case SIOCSIFDESCR: 2254 error = priv_check(td, PRIV_NET_SETIFDESCR); 2255 if (error) 2256 return (error); 2257 2258 /* 2259 * Copy only (length-1) bytes to make sure that 2260 * if_description is always nul terminated. The 2261 * length parameter is supposed to count the 2262 * terminating nul in. 2263 */ 2264 if (ifr->ifr_buffer.length > ifdescr_maxlen) 2265 return (ENAMETOOLONG); 2266 else if (ifr->ifr_buffer.length == 0) 2267 descrbuf = NULL; 2268 else { 2269 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR, 2270 M_WAITOK | M_ZERO); 2271 error = copyin(ifr->ifr_buffer.buffer, descrbuf, 2272 ifr->ifr_buffer.length - 1); 2273 if (error) { 2274 free(descrbuf, M_IFDESCR); 2275 break; 2276 } 2277 } 2278 2279 sx_xlock(&ifdescr_sx); 2280 odescrbuf = ifp->if_description; 2281 ifp->if_description = descrbuf; 2282 sx_xunlock(&ifdescr_sx); 2283 2284 getmicrotime(&ifp->if_lastchange); 2285 free(odescrbuf, M_IFDESCR); 2286 break; 2287 2288 case SIOCGIFFIB: 2289 ifr->ifr_fib = ifp->if_fib; 2290 break; 2291 2292 case SIOCSIFFIB: 2293 error = priv_check(td, PRIV_NET_SETIFFIB); 2294 if (error) 2295 return (error); 2296 if (ifr->ifr_fib >= rt_numfibs) 2297 return (EINVAL); 2298 2299 ifp->if_fib = ifr->ifr_fib; 2300 break; 2301 2302 case SIOCSIFFLAGS: 2303 error = priv_check(td, PRIV_NET_SETIFFLAGS); 2304 if (error) 2305 return (error); 2306 /* 2307 * Currently, no driver owned flags pass the IFF_CANTCHANGE 2308 * check, so we don't need special handling here yet. 2309 */ 2310 new_flags = (ifr->ifr_flags & 0xffff) | 2311 (ifr->ifr_flagshigh << 16); 2312 if (ifp->if_flags & IFF_UP && 2313 (new_flags & IFF_UP) == 0) { 2314 if_down(ifp); 2315 } else if (new_flags & IFF_UP && 2316 (ifp->if_flags & IFF_UP) == 0) { 2317 if_up(ifp); 2318 } 2319 /* See if permanently promiscuous mode bit is about to flip */ 2320 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) { 2321 if (new_flags & IFF_PPROMISC) 2322 ifp->if_flags |= IFF_PROMISC; 2323 else if (ifp->if_pcount == 0) 2324 ifp->if_flags &= ~IFF_PROMISC; 2325 log(LOG_INFO, "%s: permanently promiscuous mode %s\n", 2326 ifp->if_xname, 2327 (new_flags & IFF_PPROMISC) ? "enabled" : "disabled"); 2328 } 2329 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 2330 (new_flags &~ IFF_CANTCHANGE); 2331 if (ifp->if_ioctl) { 2332 (void) (*ifp->if_ioctl)(ifp, cmd, data); 2333 } 2334 getmicrotime(&ifp->if_lastchange); 2335 break; 2336 2337 case SIOCSIFCAP: 2338 error = priv_check(td, PRIV_NET_SETIFCAP); 2339 if (error) 2340 return (error); 2341 if (ifp->if_ioctl == NULL) 2342 return (EOPNOTSUPP); 2343 if (ifr->ifr_reqcap & ~ifp->if_capabilities) 2344 return (EINVAL); 2345 error = (*ifp->if_ioctl)(ifp, cmd, data); 2346 if (error == 0) 2347 getmicrotime(&ifp->if_lastchange); 2348 break; 2349 2350 #ifdef MAC 2351 case SIOCSIFMAC: 2352 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp); 2353 break; 2354 #endif 2355 2356 case SIOCSIFNAME: 2357 error = priv_check(td, PRIV_NET_SETIFNAME); 2358 if (error) 2359 return (error); 2360 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 2361 if (error != 0) 2362 return (error); 2363 if (new_name[0] == '\0') 2364 return (EINVAL); 2365 if (ifunit(new_name) != NULL) 2366 return (EEXIST); 2367 2368 /* 2369 * XXX: Locking. Nothing else seems to lock if_flags, 2370 * and there are numerous other races with the 2371 * ifunit() checks not being atomic with namespace 2372 * changes (renames, vmoves, if_attach, etc). 2373 */ 2374 ifp->if_flags |= IFF_RENAMING; 2375 2376 /* Announce the departure of the interface. */ 2377 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 2378 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 2379 2380 log(LOG_INFO, "%s: changing name to '%s'\n", 2381 ifp->if_xname, new_name); 2382 2383 IF_ADDR_WLOCK(ifp); 2384 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 2385 ifa = ifp->if_addr; 2386 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 2387 namelen = strlen(new_name); 2388 onamelen = sdl->sdl_nlen; 2389 /* 2390 * Move the address if needed. This is safe because we 2391 * allocate space for a name of length IFNAMSIZ when we 2392 * create this in if_attach(). 2393 */ 2394 if (namelen != onamelen) { 2395 bcopy(sdl->sdl_data + onamelen, 2396 sdl->sdl_data + namelen, sdl->sdl_alen); 2397 } 2398 bcopy(new_name, sdl->sdl_data, namelen); 2399 sdl->sdl_nlen = namelen; 2400 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 2401 bzero(sdl->sdl_data, onamelen); 2402 while (namelen != 0) 2403 sdl->sdl_data[--namelen] = 0xff; 2404 IF_ADDR_WUNLOCK(ifp); 2405 2406 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 2407 /* Announce the return of the interface. */ 2408 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 2409 2410 ifp->if_flags &= ~IFF_RENAMING; 2411 break; 2412 2413 #ifdef VIMAGE 2414 case SIOCSIFVNET: 2415 error = priv_check(td, PRIV_NET_SETIFVNET); 2416 if (error) 2417 return (error); 2418 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid); 2419 break; 2420 #endif 2421 2422 case SIOCSIFMETRIC: 2423 error = priv_check(td, PRIV_NET_SETIFMETRIC); 2424 if (error) 2425 return (error); 2426 ifp->if_metric = ifr->ifr_metric; 2427 getmicrotime(&ifp->if_lastchange); 2428 break; 2429 2430 case SIOCSIFPHYS: 2431 error = priv_check(td, PRIV_NET_SETIFPHYS); 2432 if (error) 2433 return (error); 2434 if (ifp->if_ioctl == NULL) 2435 return (EOPNOTSUPP); 2436 error = (*ifp->if_ioctl)(ifp, cmd, data); 2437 if (error == 0) 2438 getmicrotime(&ifp->if_lastchange); 2439 break; 2440 2441 case SIOCSIFMTU: 2442 { 2443 u_long oldmtu = ifp->if_mtu; 2444 2445 error = priv_check(td, PRIV_NET_SETIFMTU); 2446 if (error) 2447 return (error); 2448 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) 2449 return (EINVAL); 2450 if (ifp->if_ioctl == NULL) 2451 return (EOPNOTSUPP); 2452 error = (*ifp->if_ioctl)(ifp, cmd, data); 2453 if (error == 0) { 2454 getmicrotime(&ifp->if_lastchange); 2455 rt_ifmsg(ifp); 2456 } 2457 /* 2458 * If the link MTU changed, do network layer specific procedure. 2459 */ 2460 if (ifp->if_mtu != oldmtu) { 2461 #ifdef INET6 2462 nd6_setmtu(ifp); 2463 #endif 2464 } 2465 break; 2466 } 2467 2468 case SIOCADDMULTI: 2469 case SIOCDELMULTI: 2470 if (cmd == SIOCADDMULTI) 2471 error = priv_check(td, PRIV_NET_ADDMULTI); 2472 else 2473 error = priv_check(td, PRIV_NET_DELMULTI); 2474 if (error) 2475 return (error); 2476 2477 /* Don't allow group membership on non-multicast interfaces. */ 2478 if ((ifp->if_flags & IFF_MULTICAST) == 0) 2479 return (EOPNOTSUPP); 2480 2481 /* Don't let users screw up protocols' entries. */ 2482 if (ifr->ifr_addr.sa_family != AF_LINK) 2483 return (EINVAL); 2484 2485 if (cmd == SIOCADDMULTI) { 2486 struct ifmultiaddr *ifma; 2487 2488 /* 2489 * Userland is only permitted to join groups once 2490 * via the if_addmulti() KPI, because it cannot hold 2491 * struct ifmultiaddr * between calls. It may also 2492 * lose a race while we check if the membership 2493 * already exists. 2494 */ 2495 IF_ADDR_RLOCK(ifp); 2496 ifma = if_findmulti(ifp, &ifr->ifr_addr); 2497 IF_ADDR_RUNLOCK(ifp); 2498 if (ifma != NULL) 2499 error = EADDRINUSE; 2500 else 2501 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 2502 } else { 2503 error = if_delmulti(ifp, &ifr->ifr_addr); 2504 } 2505 if (error == 0) 2506 getmicrotime(&ifp->if_lastchange); 2507 break; 2508 2509 case SIOCSIFPHYADDR: 2510 case SIOCDIFPHYADDR: 2511 #ifdef INET6 2512 case SIOCSIFPHYADDR_IN6: 2513 #endif 2514 case SIOCSIFMEDIA: 2515 case SIOCSIFGENERIC: 2516 error = priv_check(td, PRIV_NET_HWIOCTL); 2517 if (error) 2518 return (error); 2519 if (ifp->if_ioctl == NULL) 2520 return (EOPNOTSUPP); 2521 error = (*ifp->if_ioctl)(ifp, cmd, data); 2522 if (error == 0) 2523 getmicrotime(&ifp->if_lastchange); 2524 break; 2525 2526 case SIOCGIFSTATUS: 2527 case SIOCGIFPSRCADDR: 2528 case SIOCGIFPDSTADDR: 2529 case SIOCGIFMEDIA: 2530 case SIOCGIFGENERIC: 2531 if (ifp->if_ioctl == NULL) 2532 return (EOPNOTSUPP); 2533 error = (*ifp->if_ioctl)(ifp, cmd, data); 2534 break; 2535 2536 case SIOCSIFLLADDR: 2537 error = priv_check(td, PRIV_NET_SETLLADDR); 2538 if (error) 2539 return (error); 2540 error = if_setlladdr(ifp, 2541 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); 2542 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 2543 break; 2544 2545 case SIOCAIFGROUP: 2546 { 2547 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2548 2549 error = priv_check(td, PRIV_NET_ADDIFGROUP); 2550 if (error) 2551 return (error); 2552 if ((error = if_addgroup(ifp, ifgr->ifgr_group))) 2553 return (error); 2554 break; 2555 } 2556 2557 case SIOCGIFGROUP: 2558 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp))) 2559 return (error); 2560 break; 2561 2562 case SIOCDIFGROUP: 2563 { 2564 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2565 2566 error = priv_check(td, PRIV_NET_DELIFGROUP); 2567 if (error) 2568 return (error); 2569 if ((error = if_delgroup(ifp, ifgr->ifgr_group))) 2570 return (error); 2571 break; 2572 } 2573 2574 default: 2575 error = ENOIOCTL; 2576 break; 2577 } 2578 return (error); 2579 } 2580 2581 #ifdef COMPAT_FREEBSD32 2582 struct ifconf32 { 2583 int32_t ifc_len; 2584 union { 2585 uint32_t ifcu_buf; 2586 uint32_t ifcu_req; 2587 } ifc_ifcu; 2588 }; 2589 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32) 2590 #endif 2591 2592 /* 2593 * Interface ioctls. 2594 */ 2595 int 2596 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td) 2597 { 2598 struct ifnet *ifp; 2599 struct ifreq *ifr; 2600 int error; 2601 int oif_flags; 2602 2603 CURVNET_SET(so->so_vnet); 2604 switch (cmd) { 2605 case SIOCGIFCONF: 2606 error = ifconf(cmd, data); 2607 CURVNET_RESTORE(); 2608 return (error); 2609 2610 #ifdef COMPAT_FREEBSD32 2611 case SIOCGIFCONF32: 2612 { 2613 struct ifconf32 *ifc32; 2614 struct ifconf ifc; 2615 2616 ifc32 = (struct ifconf32 *)data; 2617 ifc.ifc_len = ifc32->ifc_len; 2618 ifc.ifc_buf = PTRIN(ifc32->ifc_buf); 2619 2620 error = ifconf(SIOCGIFCONF, (void *)&ifc); 2621 CURVNET_RESTORE(); 2622 if (error == 0) 2623 ifc32->ifc_len = ifc.ifc_len; 2624 return (error); 2625 } 2626 #endif 2627 } 2628 ifr = (struct ifreq *)data; 2629 2630 switch (cmd) { 2631 #ifdef VIMAGE 2632 case SIOCSIFRVNET: 2633 error = priv_check(td, PRIV_NET_SETIFVNET); 2634 if (error == 0) 2635 error = if_vmove_reclaim(td, ifr->ifr_name, 2636 ifr->ifr_jid); 2637 CURVNET_RESTORE(); 2638 return (error); 2639 #endif 2640 case SIOCIFCREATE: 2641 case SIOCIFCREATE2: 2642 error = priv_check(td, PRIV_NET_IFCREATE); 2643 if (error == 0) 2644 error = if_clone_create(ifr->ifr_name, 2645 sizeof(ifr->ifr_name), 2646 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL); 2647 CURVNET_RESTORE(); 2648 return (error); 2649 case SIOCIFDESTROY: 2650 error = priv_check(td, PRIV_NET_IFDESTROY); 2651 if (error == 0) 2652 error = if_clone_destroy(ifr->ifr_name); 2653 CURVNET_RESTORE(); 2654 return (error); 2655 2656 case SIOCIFGCLONERS: 2657 error = if_clone_list((struct if_clonereq *)data); 2658 CURVNET_RESTORE(); 2659 return (error); 2660 case SIOCGIFGMEMB: 2661 error = if_getgroupmembers((struct ifgroupreq *)data); 2662 CURVNET_RESTORE(); 2663 return (error); 2664 #if defined(INET) || defined(INET6) 2665 case SIOCSVH: 2666 case SIOCGVH: 2667 if (carp_ioctl_p == NULL) 2668 error = EPROTONOSUPPORT; 2669 else 2670 error = (*carp_ioctl_p)(ifr, cmd, td); 2671 CURVNET_RESTORE(); 2672 return (error); 2673 #endif 2674 } 2675 2676 ifp = ifunit_ref(ifr->ifr_name); 2677 if (ifp == NULL) { 2678 CURVNET_RESTORE(); 2679 return (ENXIO); 2680 } 2681 2682 error = ifhwioctl(cmd, ifp, data, td); 2683 if (error != ENOIOCTL) { 2684 if_rele(ifp); 2685 CURVNET_RESTORE(); 2686 return (error); 2687 } 2688 2689 oif_flags = ifp->if_flags; 2690 if (so->so_proto == NULL) { 2691 if_rele(ifp); 2692 CURVNET_RESTORE(); 2693 return (EOPNOTSUPP); 2694 } 2695 2696 /* 2697 * Pass the request on to the socket control method, and if the 2698 * latter returns EOPNOTSUPP, directly to the interface. 2699 * 2700 * Make an exception for the legacy SIOCSIF* requests. Drivers 2701 * trust SIOCSIFADDR et al to come from an already privileged 2702 * layer, and do not perform any credentials checks or input 2703 * validation. 2704 */ 2705 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 2706 ifp, td)); 2707 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL && 2708 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR && 2709 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK) 2710 error = (*ifp->if_ioctl)(ifp, cmd, data); 2711 2712 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 2713 #ifdef INET6 2714 if (ifp->if_flags & IFF_UP) 2715 in6_if_up(ifp); 2716 #endif 2717 } 2718 if_rele(ifp); 2719 CURVNET_RESTORE(); 2720 return (error); 2721 } 2722 2723 /* 2724 * The code common to handling reference counted flags, 2725 * e.g., in ifpromisc() and if_allmulti(). 2726 * The "pflag" argument can specify a permanent mode flag to check, 2727 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none. 2728 * 2729 * Only to be used on stack-owned flags, not driver-owned flags. 2730 */ 2731 static int 2732 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch) 2733 { 2734 struct ifreq ifr; 2735 int error; 2736 int oldflags, oldcount; 2737 2738 /* Sanity checks to catch programming errors */ 2739 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0, 2740 ("%s: setting driver-owned flag %d", __func__, flag)); 2741 2742 if (onswitch) 2743 KASSERT(*refcount >= 0, 2744 ("%s: increment negative refcount %d for flag %d", 2745 __func__, *refcount, flag)); 2746 else 2747 KASSERT(*refcount > 0, 2748 ("%s: decrement non-positive refcount %d for flag %d", 2749 __func__, *refcount, flag)); 2750 2751 /* In case this mode is permanent, just touch refcount */ 2752 if (ifp->if_flags & pflag) { 2753 *refcount += onswitch ? 1 : -1; 2754 return (0); 2755 } 2756 2757 /* Save ifnet parameters for if_ioctl() may fail */ 2758 oldcount = *refcount; 2759 oldflags = ifp->if_flags; 2760 2761 /* 2762 * See if we aren't the only and touching refcount is enough. 2763 * Actually toggle interface flag if we are the first or last. 2764 */ 2765 if (onswitch) { 2766 if ((*refcount)++) 2767 return (0); 2768 ifp->if_flags |= flag; 2769 } else { 2770 if (--(*refcount)) 2771 return (0); 2772 ifp->if_flags &= ~flag; 2773 } 2774 2775 /* Call down the driver since we've changed interface flags */ 2776 if (ifp->if_ioctl == NULL) { 2777 error = EOPNOTSUPP; 2778 goto recover; 2779 } 2780 ifr.ifr_flags = ifp->if_flags & 0xffff; 2781 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2782 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 2783 if (error) 2784 goto recover; 2785 /* Notify userland that interface flags have changed */ 2786 rt_ifmsg(ifp); 2787 return (0); 2788 2789 recover: 2790 /* Recover after driver error */ 2791 *refcount = oldcount; 2792 ifp->if_flags = oldflags; 2793 return (error); 2794 } 2795 2796 /* 2797 * Set/clear promiscuous mode on interface ifp based on the truth value 2798 * of pswitch. The calls are reference counted so that only the first 2799 * "on" request actually has an effect, as does the final "off" request. 2800 * Results are undefined if the "off" and "on" requests are not matched. 2801 */ 2802 int 2803 ifpromisc(struct ifnet *ifp, int pswitch) 2804 { 2805 int error; 2806 int oldflags = ifp->if_flags; 2807 2808 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC, 2809 &ifp->if_pcount, pswitch); 2810 /* If promiscuous mode status has changed, log a message */ 2811 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC)) 2812 log(LOG_INFO, "%s: promiscuous mode %s\n", 2813 ifp->if_xname, 2814 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled"); 2815 return (error); 2816 } 2817 2818 /* 2819 * Return interface configuration 2820 * of system. List may be used 2821 * in later ioctl's (above) to get 2822 * other information. 2823 */ 2824 /*ARGSUSED*/ 2825 static int 2826 ifconf(u_long cmd, caddr_t data) 2827 { 2828 struct ifconf *ifc = (struct ifconf *)data; 2829 struct ifnet *ifp; 2830 struct ifaddr *ifa; 2831 struct ifreq ifr; 2832 struct sbuf *sb; 2833 int error, full = 0, valid_len, max_len; 2834 2835 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */ 2836 max_len = MAXPHYS - 1; 2837 2838 /* Prevent hostile input from being able to crash the system */ 2839 if (ifc->ifc_len <= 0) 2840 return (EINVAL); 2841 2842 again: 2843 if (ifc->ifc_len <= max_len) { 2844 max_len = ifc->ifc_len; 2845 full = 1; 2846 } 2847 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN); 2848 max_len = 0; 2849 valid_len = 0; 2850 2851 IFNET_RLOCK(); 2852 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2853 int addrs; 2854 2855 /* 2856 * Zero the ifr_name buffer to make sure we don't 2857 * disclose the contents of the stack. 2858 */ 2859 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name)); 2860 2861 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 2862 >= sizeof(ifr.ifr_name)) { 2863 sbuf_delete(sb); 2864 IFNET_RUNLOCK(); 2865 return (ENAMETOOLONG); 2866 } 2867 2868 addrs = 0; 2869 IF_ADDR_RLOCK(ifp); 2870 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2871 struct sockaddr *sa = ifa->ifa_addr; 2872 2873 if (prison_if(curthread->td_ucred, sa) != 0) 2874 continue; 2875 addrs++; 2876 if (sa->sa_len <= sizeof(*sa)) { 2877 ifr.ifr_addr = *sa; 2878 sbuf_bcat(sb, &ifr, sizeof(ifr)); 2879 max_len += sizeof(ifr); 2880 } else { 2881 sbuf_bcat(sb, &ifr, 2882 offsetof(struct ifreq, ifr_addr)); 2883 max_len += offsetof(struct ifreq, ifr_addr); 2884 sbuf_bcat(sb, sa, sa->sa_len); 2885 max_len += sa->sa_len; 2886 } 2887 2888 if (sbuf_error(sb) == 0) 2889 valid_len = sbuf_len(sb); 2890 } 2891 IF_ADDR_RUNLOCK(ifp); 2892 if (addrs == 0) { 2893 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr)); 2894 sbuf_bcat(sb, &ifr, sizeof(ifr)); 2895 max_len += sizeof(ifr); 2896 2897 if (sbuf_error(sb) == 0) 2898 valid_len = sbuf_len(sb); 2899 } 2900 } 2901 IFNET_RUNLOCK(); 2902 2903 /* 2904 * If we didn't allocate enough space (uncommon), try again. If 2905 * we have already allocated as much space as we are allowed, 2906 * return what we've got. 2907 */ 2908 if (valid_len != max_len && !full) { 2909 sbuf_delete(sb); 2910 goto again; 2911 } 2912 2913 ifc->ifc_len = valid_len; 2914 sbuf_finish(sb); 2915 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len); 2916 sbuf_delete(sb); 2917 return (error); 2918 } 2919 2920 /* 2921 * Just like ifpromisc(), but for all-multicast-reception mode. 2922 */ 2923 int 2924 if_allmulti(struct ifnet *ifp, int onswitch) 2925 { 2926 2927 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch)); 2928 } 2929 2930 struct ifmultiaddr * 2931 if_findmulti(struct ifnet *ifp, struct sockaddr *sa) 2932 { 2933 struct ifmultiaddr *ifma; 2934 2935 IF_ADDR_LOCK_ASSERT(ifp); 2936 2937 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2938 if (sa->sa_family == AF_LINK) { 2939 if (sa_dl_equal(ifma->ifma_addr, sa)) 2940 break; 2941 } else { 2942 if (sa_equal(ifma->ifma_addr, sa)) 2943 break; 2944 } 2945 } 2946 2947 return ifma; 2948 } 2949 2950 /* 2951 * Allocate a new ifmultiaddr and initialize based on passed arguments. We 2952 * make copies of passed sockaddrs. The ifmultiaddr will not be added to 2953 * the ifnet multicast address list here, so the caller must do that and 2954 * other setup work (such as notifying the device driver). The reference 2955 * count is initialized to 1. 2956 */ 2957 static struct ifmultiaddr * 2958 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa, 2959 int mflags) 2960 { 2961 struct ifmultiaddr *ifma; 2962 struct sockaddr *dupsa; 2963 2964 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags | 2965 M_ZERO); 2966 if (ifma == NULL) 2967 return (NULL); 2968 2969 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags); 2970 if (dupsa == NULL) { 2971 free(ifma, M_IFMADDR); 2972 return (NULL); 2973 } 2974 bcopy(sa, dupsa, sa->sa_len); 2975 ifma->ifma_addr = dupsa; 2976 2977 ifma->ifma_ifp = ifp; 2978 ifma->ifma_refcount = 1; 2979 ifma->ifma_protospec = NULL; 2980 2981 if (llsa == NULL) { 2982 ifma->ifma_lladdr = NULL; 2983 return (ifma); 2984 } 2985 2986 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags); 2987 if (dupsa == NULL) { 2988 free(ifma->ifma_addr, M_IFMADDR); 2989 free(ifma, M_IFMADDR); 2990 return (NULL); 2991 } 2992 bcopy(llsa, dupsa, llsa->sa_len); 2993 ifma->ifma_lladdr = dupsa; 2994 2995 return (ifma); 2996 } 2997 2998 /* 2999 * if_freemulti: free ifmultiaddr structure and possibly attached related 3000 * addresses. The caller is responsible for implementing reference 3001 * counting, notifying the driver, handling routing messages, and releasing 3002 * any dependent link layer state. 3003 */ 3004 static void 3005 if_freemulti(struct ifmultiaddr *ifma) 3006 { 3007 3008 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d", 3009 ifma->ifma_refcount)); 3010 3011 if (ifma->ifma_lladdr != NULL) 3012 free(ifma->ifma_lladdr, M_IFMADDR); 3013 free(ifma->ifma_addr, M_IFMADDR); 3014 free(ifma, M_IFMADDR); 3015 } 3016 3017 /* 3018 * Register an additional multicast address with a network interface. 3019 * 3020 * - If the address is already present, bump the reference count on the 3021 * address and return. 3022 * - If the address is not link-layer, look up a link layer address. 3023 * - Allocate address structures for one or both addresses, and attach to the 3024 * multicast address list on the interface. If automatically adding a link 3025 * layer address, the protocol address will own a reference to the link 3026 * layer address, to be freed when it is freed. 3027 * - Notify the network device driver of an addition to the multicast address 3028 * list. 3029 * 3030 * 'sa' points to caller-owned memory with the desired multicast address. 3031 * 3032 * 'retifma' will be used to return a pointer to the resulting multicast 3033 * address reference, if desired. 3034 */ 3035 int 3036 if_addmulti(struct ifnet *ifp, struct sockaddr *sa, 3037 struct ifmultiaddr **retifma) 3038 { 3039 struct ifmultiaddr *ifma, *ll_ifma; 3040 struct sockaddr *llsa; 3041 struct sockaddr_dl sdl; 3042 int error; 3043 3044 /* 3045 * If the address is already present, return a new reference to it; 3046 * otherwise, allocate storage and set up a new address. 3047 */ 3048 IF_ADDR_WLOCK(ifp); 3049 ifma = if_findmulti(ifp, sa); 3050 if (ifma != NULL) { 3051 ifma->ifma_refcount++; 3052 if (retifma != NULL) 3053 *retifma = ifma; 3054 IF_ADDR_WUNLOCK(ifp); 3055 return (0); 3056 } 3057 3058 /* 3059 * The address isn't already present; resolve the protocol address 3060 * into a link layer address, and then look that up, bump its 3061 * refcount or allocate an ifma for that also. 3062 * Most link layer resolving functions returns address data which 3063 * fits inside default sockaddr_dl structure. However callback 3064 * can allocate another sockaddr structure, in that case we need to 3065 * free it later. 3066 */ 3067 llsa = NULL; 3068 ll_ifma = NULL; 3069 if (ifp->if_resolvemulti != NULL) { 3070 /* Provide called function with buffer size information */ 3071 sdl.sdl_len = sizeof(sdl); 3072 llsa = (struct sockaddr *)&sdl; 3073 error = ifp->if_resolvemulti(ifp, &llsa, sa); 3074 if (error) 3075 goto unlock_out; 3076 } 3077 3078 /* 3079 * Allocate the new address. Don't hook it up yet, as we may also 3080 * need to allocate a link layer multicast address. 3081 */ 3082 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT); 3083 if (ifma == NULL) { 3084 error = ENOMEM; 3085 goto free_llsa_out; 3086 } 3087 3088 /* 3089 * If a link layer address is found, we'll need to see if it's 3090 * already present in the address list, or allocate is as well. 3091 * When this block finishes, the link layer address will be on the 3092 * list. 3093 */ 3094 if (llsa != NULL) { 3095 ll_ifma = if_findmulti(ifp, llsa); 3096 if (ll_ifma == NULL) { 3097 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT); 3098 if (ll_ifma == NULL) { 3099 --ifma->ifma_refcount; 3100 if_freemulti(ifma); 3101 error = ENOMEM; 3102 goto free_llsa_out; 3103 } 3104 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma, 3105 ifma_link); 3106 } else 3107 ll_ifma->ifma_refcount++; 3108 ifma->ifma_llifma = ll_ifma; 3109 } 3110 3111 /* 3112 * We now have a new multicast address, ifma, and possibly a new or 3113 * referenced link layer address. Add the primary address to the 3114 * ifnet address list. 3115 */ 3116 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 3117 3118 if (retifma != NULL) 3119 *retifma = ifma; 3120 3121 /* 3122 * Must generate the message while holding the lock so that 'ifma' 3123 * pointer is still valid. 3124 */ 3125 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 3126 IF_ADDR_WUNLOCK(ifp); 3127 3128 /* 3129 * We are certain we have added something, so call down to the 3130 * interface to let them know about it. 3131 */ 3132 if (ifp->if_ioctl != NULL) { 3133 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0); 3134 } 3135 3136 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3137 link_free_sdl(llsa); 3138 3139 return (0); 3140 3141 free_llsa_out: 3142 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3143 link_free_sdl(llsa); 3144 3145 unlock_out: 3146 IF_ADDR_WUNLOCK(ifp); 3147 return (error); 3148 } 3149 3150 /* 3151 * Delete a multicast group membership by network-layer group address. 3152 * 3153 * Returns ENOENT if the entry could not be found. If ifp no longer 3154 * exists, results are undefined. This entry point should only be used 3155 * from subsystems which do appropriate locking to hold ifp for the 3156 * duration of the call. 3157 * Network-layer protocol domains must use if_delmulti_ifma(). 3158 */ 3159 int 3160 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 3161 { 3162 struct ifmultiaddr *ifma; 3163 int lastref; 3164 #ifdef INVARIANTS 3165 struct ifnet *oifp; 3166 3167 IFNET_RLOCK_NOSLEEP(); 3168 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3169 if (ifp == oifp) 3170 break; 3171 if (ifp != oifp) 3172 ifp = NULL; 3173 IFNET_RUNLOCK_NOSLEEP(); 3174 3175 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__)); 3176 #endif 3177 if (ifp == NULL) 3178 return (ENOENT); 3179 3180 IF_ADDR_WLOCK(ifp); 3181 lastref = 0; 3182 ifma = if_findmulti(ifp, sa); 3183 if (ifma != NULL) 3184 lastref = if_delmulti_locked(ifp, ifma, 0); 3185 IF_ADDR_WUNLOCK(ifp); 3186 3187 if (ifma == NULL) 3188 return (ENOENT); 3189 3190 if (lastref && ifp->if_ioctl != NULL) { 3191 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3192 } 3193 3194 return (0); 3195 } 3196 3197 /* 3198 * Delete all multicast group membership for an interface. 3199 * Should be used to quickly flush all multicast filters. 3200 */ 3201 void 3202 if_delallmulti(struct ifnet *ifp) 3203 { 3204 struct ifmultiaddr *ifma; 3205 struct ifmultiaddr *next; 3206 3207 IF_ADDR_WLOCK(ifp); 3208 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 3209 if_delmulti_locked(ifp, ifma, 0); 3210 IF_ADDR_WUNLOCK(ifp); 3211 } 3212 3213 /* 3214 * Delete a multicast group membership by group membership pointer. 3215 * Network-layer protocol domains must use this routine. 3216 * 3217 * It is safe to call this routine if the ifp disappeared. 3218 */ 3219 void 3220 if_delmulti_ifma(struct ifmultiaddr *ifma) 3221 { 3222 struct ifnet *ifp; 3223 int lastref; 3224 3225 ifp = ifma->ifma_ifp; 3226 #ifdef DIAGNOSTIC 3227 if (ifp == NULL) { 3228 printf("%s: ifma_ifp seems to be detached\n", __func__); 3229 } else { 3230 struct ifnet *oifp; 3231 3232 IFNET_RLOCK_NOSLEEP(); 3233 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3234 if (ifp == oifp) 3235 break; 3236 if (ifp != oifp) { 3237 printf("%s: ifnet %p disappeared\n", __func__, ifp); 3238 ifp = NULL; 3239 } 3240 IFNET_RUNLOCK_NOSLEEP(); 3241 } 3242 #endif 3243 /* 3244 * If and only if the ifnet instance exists: Acquire the address lock. 3245 */ 3246 if (ifp != NULL) 3247 IF_ADDR_WLOCK(ifp); 3248 3249 lastref = if_delmulti_locked(ifp, ifma, 0); 3250 3251 if (ifp != NULL) { 3252 /* 3253 * If and only if the ifnet instance exists: 3254 * Release the address lock. 3255 * If the group was left: update the hardware hash filter. 3256 */ 3257 IF_ADDR_WUNLOCK(ifp); 3258 if (lastref && ifp->if_ioctl != NULL) { 3259 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3260 } 3261 } 3262 } 3263 3264 /* 3265 * Perform deletion of network-layer and/or link-layer multicast address. 3266 * 3267 * Return 0 if the reference count was decremented. 3268 * Return 1 if the final reference was released, indicating that the 3269 * hardware hash filter should be reprogrammed. 3270 */ 3271 static int 3272 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching) 3273 { 3274 struct ifmultiaddr *ll_ifma; 3275 3276 if (ifp != NULL && ifma->ifma_ifp != NULL) { 3277 KASSERT(ifma->ifma_ifp == ifp, 3278 ("%s: inconsistent ifp %p", __func__, ifp)); 3279 IF_ADDR_WLOCK_ASSERT(ifp); 3280 } 3281 3282 ifp = ifma->ifma_ifp; 3283 3284 /* 3285 * If the ifnet is detaching, null out references to ifnet, 3286 * so that upper protocol layers will notice, and not attempt 3287 * to obtain locks for an ifnet which no longer exists. The 3288 * routing socket announcement must happen before the ifnet 3289 * instance is detached from the system. 3290 */ 3291 if (detaching) { 3292 #ifdef DIAGNOSTIC 3293 printf("%s: detaching ifnet instance %p\n", __func__, ifp); 3294 #endif 3295 /* 3296 * ifp may already be nulled out if we are being reentered 3297 * to delete the ll_ifma. 3298 */ 3299 if (ifp != NULL) { 3300 rt_newmaddrmsg(RTM_DELMADDR, ifma); 3301 ifma->ifma_ifp = NULL; 3302 } 3303 } 3304 3305 if (--ifma->ifma_refcount > 0) 3306 return 0; 3307 3308 /* 3309 * If this ifma is a network-layer ifma, a link-layer ifma may 3310 * have been associated with it. Release it first if so. 3311 */ 3312 ll_ifma = ifma->ifma_llifma; 3313 if (ll_ifma != NULL) { 3314 KASSERT(ifma->ifma_lladdr != NULL, 3315 ("%s: llifma w/o lladdr", __func__)); 3316 if (detaching) 3317 ll_ifma->ifma_ifp = NULL; /* XXX */ 3318 if (--ll_ifma->ifma_refcount == 0) { 3319 if (ifp != NULL) { 3320 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, 3321 ifma_link); 3322 } 3323 if_freemulti(ll_ifma); 3324 } 3325 } 3326 3327 if (ifp != NULL) 3328 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 3329 3330 if_freemulti(ifma); 3331 3332 /* 3333 * The last reference to this instance of struct ifmultiaddr 3334 * was released; the hardware should be notified of this change. 3335 */ 3336 return 1; 3337 } 3338 3339 /* 3340 * Set the link layer address on an interface. 3341 * 3342 * At this time we only support certain types of interfaces, 3343 * and we don't allow the length of the address to change. 3344 */ 3345 int 3346 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 3347 { 3348 struct sockaddr_dl *sdl; 3349 struct ifaddr *ifa; 3350 struct ifreq ifr; 3351 3352 IF_ADDR_RLOCK(ifp); 3353 ifa = ifp->if_addr; 3354 if (ifa == NULL) { 3355 IF_ADDR_RUNLOCK(ifp); 3356 return (EINVAL); 3357 } 3358 ifa_ref(ifa); 3359 IF_ADDR_RUNLOCK(ifp); 3360 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 3361 if (sdl == NULL) { 3362 ifa_free(ifa); 3363 return (EINVAL); 3364 } 3365 if (len != sdl->sdl_alen) { /* don't allow length to change */ 3366 ifa_free(ifa); 3367 return (EINVAL); 3368 } 3369 switch (ifp->if_type) { 3370 case IFT_ETHER: 3371 case IFT_FDDI: 3372 case IFT_XETHER: 3373 case IFT_ISO88025: 3374 case IFT_L2VLAN: 3375 case IFT_BRIDGE: 3376 case IFT_ARCNET: 3377 case IFT_IEEE8023ADLAG: 3378 case IFT_IEEE80211: 3379 bcopy(lladdr, LLADDR(sdl), len); 3380 ifa_free(ifa); 3381 break; 3382 default: 3383 ifa_free(ifa); 3384 return (ENODEV); 3385 } 3386 3387 /* 3388 * If the interface is already up, we need 3389 * to re-init it in order to reprogram its 3390 * address filter. 3391 */ 3392 if ((ifp->if_flags & IFF_UP) != 0) { 3393 if (ifp->if_ioctl) { 3394 ifp->if_flags &= ~IFF_UP; 3395 ifr.ifr_flags = ifp->if_flags & 0xffff; 3396 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3397 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3398 ifp->if_flags |= IFF_UP; 3399 ifr.ifr_flags = ifp->if_flags & 0xffff; 3400 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3401 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3402 } 3403 #ifdef INET 3404 /* 3405 * Also send gratuitous ARPs to notify other nodes about 3406 * the address change. 3407 */ 3408 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 3409 if (ifa->ifa_addr->sa_family == AF_INET) 3410 arp_ifinit(ifp, ifa); 3411 } 3412 #endif 3413 } 3414 return (0); 3415 } 3416 3417 /* 3418 * The name argument must be a pointer to storage which will last as 3419 * long as the interface does. For physical devices, the result of 3420 * device_get_name(dev) is a good choice and for pseudo-devices a 3421 * static string works well. 3422 */ 3423 void 3424 if_initname(struct ifnet *ifp, const char *name, int unit) 3425 { 3426 ifp->if_dname = name; 3427 ifp->if_dunit = unit; 3428 if (unit != IF_DUNIT_NONE) 3429 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 3430 else 3431 strlcpy(ifp->if_xname, name, IFNAMSIZ); 3432 } 3433 3434 int 3435 if_printf(struct ifnet *ifp, const char * fmt, ...) 3436 { 3437 va_list ap; 3438 int retval; 3439 3440 retval = printf("%s: ", ifp->if_xname); 3441 va_start(ap, fmt); 3442 retval += vprintf(fmt, ap); 3443 va_end(ap); 3444 return (retval); 3445 } 3446 3447 void 3448 if_start(struct ifnet *ifp) 3449 { 3450 3451 (*(ifp)->if_start)(ifp); 3452 } 3453 3454 /* 3455 * Backwards compatibility interface for drivers 3456 * that have not implemented it 3457 */ 3458 static int 3459 if_transmit(struct ifnet *ifp, struct mbuf *m) 3460 { 3461 int error; 3462 3463 IFQ_HANDOFF(ifp, m, error); 3464 return (error); 3465 } 3466 3467 int 3468 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust) 3469 { 3470 int active = 0; 3471 3472 IF_LOCK(ifq); 3473 if (_IF_QFULL(ifq)) { 3474 _IF_DROP(ifq); 3475 IF_UNLOCK(ifq); 3476 m_freem(m); 3477 return (0); 3478 } 3479 if (ifp != NULL) { 3480 ifp->if_obytes += m->m_pkthdr.len + adjust; 3481 if (m->m_flags & (M_BCAST|M_MCAST)) 3482 ifp->if_omcasts++; 3483 active = ifp->if_drv_flags & IFF_DRV_OACTIVE; 3484 } 3485 _IF_ENQUEUE(ifq, m); 3486 IF_UNLOCK(ifq); 3487 if (ifp != NULL && !active) 3488 (*(ifp)->if_start)(ifp); 3489 return (1); 3490 } 3491 3492 void 3493 if_register_com_alloc(u_char type, 3494 if_com_alloc_t *a, if_com_free_t *f) 3495 { 3496 3497 KASSERT(if_com_alloc[type] == NULL, 3498 ("if_register_com_alloc: %d already registered", type)); 3499 KASSERT(if_com_free[type] == NULL, 3500 ("if_register_com_alloc: %d free already registered", type)); 3501 3502 if_com_alloc[type] = a; 3503 if_com_free[type] = f; 3504 } 3505 3506 void 3507 if_deregister_com_alloc(u_char type) 3508 { 3509 3510 KASSERT(if_com_alloc[type] != NULL, 3511 ("if_deregister_com_alloc: %d not registered", type)); 3512 KASSERT(if_com_free[type] != NULL, 3513 ("if_deregister_com_alloc: %d free not registered", type)); 3514 if_com_alloc[type] = NULL; 3515 if_com_free[type] = NULL; 3516 } 3517 3518 /* API for driver access to network stack owned ifnet.*/ 3519 uint64_t 3520 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate) 3521 { 3522 uint64_t oldbrate; 3523 3524 oldbrate = ifp->if_baudrate; 3525 ifp->if_baudrate = baudrate; 3526 return (oldbrate); 3527 } 3528 3529 uint64_t 3530 if_getbaudrate(if_t ifp) 3531 { 3532 3533 return (((struct ifnet *)ifp)->if_baudrate); 3534 } 3535 3536 int 3537 if_setcapabilities(if_t ifp, int capabilities) 3538 { 3539 ((struct ifnet *)ifp)->if_capabilities = capabilities; 3540 return (0); 3541 } 3542 3543 int 3544 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit) 3545 { 3546 ((struct ifnet *)ifp)->if_capabilities |= setbit; 3547 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit; 3548 3549 return (0); 3550 } 3551 3552 int 3553 if_getcapabilities(if_t ifp) 3554 { 3555 return ((struct ifnet *)ifp)->if_capabilities; 3556 } 3557 3558 int 3559 if_setcapenable(if_t ifp, int capabilities) 3560 { 3561 ((struct ifnet *)ifp)->if_capenable = capabilities; 3562 return (0); 3563 } 3564 3565 int 3566 if_setcapenablebit(if_t ifp, int setcap, int clearcap) 3567 { 3568 if(setcap) 3569 ((struct ifnet *)ifp)->if_capenable |= setcap; 3570 if(clearcap) 3571 ((struct ifnet *)ifp)->if_capenable &= ~clearcap; 3572 3573 return (0); 3574 } 3575 3576 const char * 3577 if_getdname(if_t ifp) 3578 { 3579 return ((struct ifnet *)ifp)->if_dname; 3580 } 3581 3582 int 3583 if_togglecapenable(if_t ifp, int togglecap) 3584 { 3585 ((struct ifnet *)ifp)->if_capenable ^= togglecap; 3586 return (0); 3587 } 3588 3589 int 3590 if_getcapenable(if_t ifp) 3591 { 3592 return ((struct ifnet *)ifp)->if_capenable; 3593 } 3594 3595 /* 3596 * This is largely undesirable because it ties ifnet to a device, but does 3597 * provide flexiblity for an embedded product vendor. Should be used with 3598 * the understanding that it violates the interface boundaries, and should be 3599 * a last resort only. 3600 */ 3601 int 3602 if_setdev(if_t ifp, void *dev) 3603 { 3604 return (0); 3605 } 3606 3607 int 3608 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags) 3609 { 3610 ((struct ifnet *)ifp)->if_drv_flags |= set_flags; 3611 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags; 3612 3613 return (0); 3614 } 3615 3616 int 3617 if_getdrvflags(if_t ifp) 3618 { 3619 return ((struct ifnet *)ifp)->if_drv_flags; 3620 } 3621 3622 int 3623 if_setdrvflags(if_t ifp, int flags) 3624 { 3625 ((struct ifnet *)ifp)->if_drv_flags = flags; 3626 return (0); 3627 } 3628 3629 3630 int 3631 if_setflags(if_t ifp, int flags) 3632 { 3633 ((struct ifnet *)ifp)->if_flags = flags; 3634 return (0); 3635 } 3636 3637 int 3638 if_setflagbits(if_t ifp, int set, int clear) 3639 { 3640 ((struct ifnet *)ifp)->if_flags |= set; 3641 ((struct ifnet *)ifp)->if_flags &= ~clear; 3642 3643 return (0); 3644 } 3645 3646 int 3647 if_getflags(if_t ifp) 3648 { 3649 return ((struct ifnet *)ifp)->if_flags; 3650 } 3651 3652 int 3653 if_clearhwassist(if_t ifp) 3654 { 3655 ((struct ifnet *)ifp)->if_hwassist = 0; 3656 return (0); 3657 } 3658 3659 int 3660 if_sethwassistbits(if_t ifp, int toset, int toclear) 3661 { 3662 ((struct ifnet *)ifp)->if_hwassist |= toset; 3663 ((struct ifnet *)ifp)->if_hwassist &= ~toclear; 3664 3665 return (0); 3666 } 3667 3668 int 3669 if_sethwassist(if_t ifp, int hwassist_bit) 3670 { 3671 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit; 3672 return (0); 3673 } 3674 3675 int 3676 if_gethwassist(if_t ifp) 3677 { 3678 return ((struct ifnet *)ifp)->if_hwassist; 3679 } 3680 3681 int 3682 if_setmtu(if_t ifp, int mtu) 3683 { 3684 ((struct ifnet *)ifp)->if_mtu = mtu; 3685 return (0); 3686 } 3687 3688 int 3689 if_getmtu(if_t ifp) 3690 { 3691 return ((struct ifnet *)ifp)->if_mtu; 3692 } 3693 3694 int 3695 if_setsoftc(if_t ifp, void *softc) 3696 { 3697 ((struct ifnet *)ifp)->if_softc = softc; 3698 return (0); 3699 } 3700 3701 void * 3702 if_getsoftc(if_t ifp) 3703 { 3704 return ((struct ifnet *)ifp)->if_softc; 3705 } 3706 3707 void 3708 if_setrcvif(struct mbuf *m, if_t ifp) 3709 { 3710 m->m_pkthdr.rcvif = (struct ifnet *)ifp; 3711 } 3712 3713 void 3714 if_setvtag(struct mbuf *m, uint16_t tag) 3715 { 3716 m->m_pkthdr.ether_vtag = tag; 3717 } 3718 3719 uint16_t 3720 if_getvtag(struct mbuf *m) 3721 { 3722 3723 return (m->m_pkthdr.ether_vtag); 3724 } 3725 3726 /* Statistics */ 3727 int 3728 if_incipackets(if_t ifp, int pkts) 3729 { 3730 ((struct ifnet *)ifp)->if_ipackets += pkts; 3731 return (0); 3732 } 3733 3734 int 3735 if_incopackets(if_t ifp, int pkts) 3736 { 3737 ((struct ifnet *)ifp)->if_opackets += pkts; 3738 return (0); 3739 } 3740 3741 int 3742 if_incierrors(if_t ifp, int ierrors) 3743 { 3744 ((struct ifnet *)ifp)->if_ierrors += ierrors; 3745 return (0); 3746 } 3747 3748 3749 int 3750 if_setierrors(if_t ifp, int ierrors) 3751 { 3752 ((struct ifnet *)ifp)->if_ierrors = ierrors; 3753 return (0); 3754 } 3755 3756 int 3757 if_setoerrors(if_t ifp, int oerrors) 3758 { 3759 ((struct ifnet *)ifp)->if_oerrors = oerrors; 3760 return (0); 3761 } 3762 3763 int if_incoerrors(if_t ifp, int oerrors) 3764 { 3765 ((struct ifnet *)ifp)->if_oerrors += oerrors; 3766 return (0); 3767 } 3768 3769 int if_inciqdrops(if_t ifp, int val) 3770 { 3771 ((struct ifnet *)ifp)->if_iqdrops += val; 3772 return (0); 3773 } 3774 3775 int 3776 if_setcollisions(if_t ifp, int collisions) 3777 { 3778 ((struct ifnet *)ifp)->if_collisions = collisions; 3779 return (0); 3780 } 3781 3782 int 3783 if_inccollisions(if_t ifp, int collisions) 3784 { 3785 ((struct ifnet *)ifp)->if_collisions += collisions; 3786 return (0); 3787 } 3788 3789 int 3790 if_setipackets(if_t ifp, int pkts) 3791 { 3792 ((struct ifnet *)ifp)->if_ipackets = pkts; 3793 return (0); 3794 } 3795 3796 int 3797 if_setopackets(if_t ifp, int pkts) 3798 { 3799 ((struct ifnet *)ifp)->if_opackets = pkts; 3800 return (0); 3801 } 3802 3803 int 3804 if_incobytes(if_t ifp, int bytes) 3805 { 3806 ((struct ifnet *)ifp)->if_obytes += bytes; 3807 return (0); 3808 } 3809 3810 int 3811 if_setibytes(if_t ifp, int bytes) 3812 { 3813 ((struct ifnet *)ifp)->if_ibytes = bytes; 3814 return (0); 3815 } 3816 3817 int 3818 if_setobytes(if_t ifp, int bytes) 3819 { 3820 ((struct ifnet *)ifp)->if_obytes = bytes; 3821 return (0); 3822 } 3823 3824 3825 int 3826 if_sendq_empty(if_t ifp) 3827 { 3828 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd); 3829 } 3830 3831 int if_getiqdrops(if_t ifp) 3832 { 3833 return ((struct ifnet *)ifp)->if_iqdrops; 3834 } 3835 3836 int 3837 if_incimcasts(if_t ifp, int mcast) 3838 { 3839 ((struct ifnet *)ifp)->if_imcasts += mcast; 3840 return (0); 3841 } 3842 3843 3844 int 3845 if_incomcasts(if_t ifp, int mcast) 3846 { 3847 ((struct ifnet *)ifp)->if_omcasts += mcast; 3848 return (0); 3849 } 3850 3851 int 3852 if_setimcasts(if_t ifp, int mcast) 3853 { 3854 ((struct ifnet *)ifp)->if_imcasts = mcast; 3855 return (0); 3856 } 3857 3858 3859 struct ifaddr * 3860 if_getifaddr(if_t ifp) 3861 { 3862 return ((struct ifnet *)ifp)->if_addr; 3863 } 3864 3865 int 3866 if_getamcount(if_t ifp) 3867 { 3868 return ((struct ifnet *)ifp)->if_amcount; 3869 } 3870 3871 3872 int 3873 if_setsendqready(if_t ifp) 3874 { 3875 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd); 3876 return (0); 3877 } 3878 3879 int 3880 if_setsendqlen(if_t ifp, int tx_desc_count) 3881 { 3882 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count); 3883 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count; 3884 3885 return (0); 3886 } 3887 3888 int 3889 if_vlantrunkinuse(if_t ifp) 3890 { 3891 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0; 3892 } 3893 3894 int 3895 if_input(if_t ifp, struct mbuf* sendmp) 3896 { 3897 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp); 3898 return (0); 3899 3900 } 3901 3902 /* XXX */ 3903 #ifndef ETH_ADDR_LEN 3904 #define ETH_ADDR_LEN 6 3905 #endif 3906 3907 int 3908 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max) 3909 { 3910 struct ifmultiaddr *ifma; 3911 uint8_t *lmta = (uint8_t *)mta; 3912 int mcnt = 0; 3913 3914 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 3915 if (ifma->ifma_addr->sa_family != AF_LINK) 3916 continue; 3917 3918 if (mcnt == max) 3919 break; 3920 3921 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 3922 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN); 3923 mcnt++; 3924 } 3925 *cnt = mcnt; 3926 3927 return (0); 3928 } 3929 3930 int 3931 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max) 3932 { 3933 int error; 3934 3935 if_maddr_rlock(ifp); 3936 error = if_setupmultiaddr(ifp, mta, cnt, max); 3937 if_maddr_runlock(ifp); 3938 return (error); 3939 } 3940 3941 int 3942 if_multiaddr_count(if_t ifp, int max) 3943 { 3944 struct ifmultiaddr *ifma; 3945 int count; 3946 3947 count = 0; 3948 if_maddr_rlock(ifp); 3949 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 3950 if (ifma->ifma_addr->sa_family != AF_LINK) 3951 continue; 3952 count++; 3953 if (count == max) 3954 break; 3955 } 3956 if_maddr_runlock(ifp); 3957 return (count); 3958 } 3959 3960 struct mbuf * 3961 if_dequeue(if_t ifp) 3962 { 3963 struct mbuf *m; 3964 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m); 3965 3966 return (m); 3967 } 3968 3969 int 3970 if_sendq_prepend(if_t ifp, struct mbuf *m) 3971 { 3972 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m); 3973 return (0); 3974 } 3975 3976 int 3977 if_setifheaderlen(if_t ifp, int len) 3978 { 3979 ((struct ifnet *)ifp)->if_hdrlen = len; 3980 return (0); 3981 } 3982 3983 caddr_t 3984 if_getlladdr(if_t ifp) 3985 { 3986 return (IF_LLADDR((struct ifnet *)ifp)); 3987 } 3988 3989 void * 3990 if_gethandle(u_char type) 3991 { 3992 return (if_alloc(type)); 3993 } 3994 3995 void 3996 if_bpfmtap(if_t ifh, struct mbuf *m) 3997 { 3998 struct ifnet *ifp = (struct ifnet *)ifh; 3999 4000 BPF_MTAP(ifp, m); 4001 } 4002 4003 void 4004 if_etherbpfmtap(if_t ifh, struct mbuf *m) 4005 { 4006 struct ifnet *ifp = (struct ifnet *)ifh; 4007 4008 ETHER_BPF_MTAP(ifp, m); 4009 } 4010 4011 void 4012 if_vlancap(if_t ifh) 4013 { 4014 struct ifnet *ifp = (struct ifnet *)ifh; 4015 VLAN_CAPABILITIES(ifp); 4016 } 4017 4018 void 4019 if_setinitfn(if_t ifp, void (*init_fn)(void *)) 4020 { 4021 ((struct ifnet *)ifp)->if_init = init_fn; 4022 } 4023 4024 void 4025 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t)) 4026 { 4027 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn; 4028 } 4029 4030 void 4031 if_setstartfn(if_t ifp, void (*start_fn)(if_t)) 4032 { 4033 ((struct ifnet *)ifp)->if_start = (void *)start_fn; 4034 } 4035 4036 void 4037 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn) 4038 { 4039 ((struct ifnet *)ifp)->if_transmit = start_fn; 4040 } 4041 4042 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn) 4043 { 4044 ((struct ifnet *)ifp)->if_qflush = flush_fn; 4045 4046 } 4047 4048 /* Revisit these - These are inline functions originally. */ 4049 int 4050 drbr_inuse_drv(if_t ifh, struct buf_ring *br) 4051 { 4052 return drbr_inuse_drv(ifh, br); 4053 } 4054 4055 struct mbuf* 4056 drbr_dequeue_drv(if_t ifh, struct buf_ring *br) 4057 { 4058 return drbr_dequeue(ifh, br); 4059 } 4060 4061 int 4062 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br) 4063 { 4064 return drbr_needs_enqueue(ifh, br); 4065 } 4066 4067 int 4068 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m) 4069 { 4070 return drbr_enqueue(ifh, br, m); 4071 4072 } 4073