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 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers"); 103 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management"); 104 105 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN, 106 &ifqmaxlen, 0, "max send queue size"); 107 108 /* Log link state change events */ 109 static int log_link_state_change = 1; 110 111 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW, 112 &log_link_state_change, 0, 113 "log interface link state change events"); 114 115 /* Log promiscuous mode change events */ 116 static int log_promisc_mode_change = 1; 117 118 SYSCTL_INT(_net_link, OID_AUTO, log_promisc_mode_change, CTLFLAG_RW, 119 &log_promisc_mode_change, 1, 120 "log promiscuous mode change events"); 121 122 /* Interface description */ 123 static unsigned int ifdescr_maxlen = 1024; 124 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW, 125 &ifdescr_maxlen, 0, 126 "administrative maximum length for interface description"); 127 128 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions"); 129 130 /* global sx for non-critical path ifdescr */ 131 static struct sx ifdescr_sx; 132 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr"); 133 134 void (*bridge_linkstate_p)(struct ifnet *ifp); 135 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state); 136 void (*lagg_linkstate_p)(struct ifnet *ifp, int state); 137 /* These are external hooks for CARP. */ 138 void (*carp_linkstate_p)(struct ifnet *ifp); 139 void (*carp_demote_adj_p)(int, char *); 140 int (*carp_master_p)(struct ifaddr *); 141 #if defined(INET) || defined(INET6) 142 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost); 143 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m, 144 const struct sockaddr *sa); 145 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *); 146 int (*carp_attach_p)(struct ifaddr *, int); 147 void (*carp_detach_p)(struct ifaddr *); 148 #endif 149 #ifdef INET 150 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **); 151 #endif 152 #ifdef INET6 153 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6); 154 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m, 155 const struct in6_addr *taddr); 156 #endif 157 158 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL; 159 160 /* 161 * XXX: Style; these should be sorted alphabetically, and unprototyped 162 * static functions should be prototyped. Currently they are sorted by 163 * declaration order. 164 */ 165 static void if_attachdomain(void *); 166 static void if_attachdomain1(struct ifnet *); 167 static int ifconf(u_long, caddr_t); 168 static void if_freemulti(struct ifmultiaddr *); 169 static void if_grow(void); 170 static void if_input_default(struct ifnet *, struct mbuf *); 171 static int if_requestencap_default(struct ifnet *, struct if_encap_req *); 172 static void if_route(struct ifnet *, int flag, int fam); 173 static int if_setflag(struct ifnet *, int, int, int *, int); 174 static int if_transmit(struct ifnet *ifp, struct mbuf *m); 175 static void if_unroute(struct ifnet *, int flag, int fam); 176 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 177 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *); 178 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int); 179 static void do_link_state_change(void *, int); 180 static int if_getgroup(struct ifgroupreq *, struct ifnet *); 181 static int if_getgroupmembers(struct ifgroupreq *); 182 static void if_delgroups(struct ifnet *); 183 static void if_attach_internal(struct ifnet *, int, struct if_clone *); 184 static int if_detach_internal(struct ifnet *, int, struct if_clone **); 185 #ifdef VIMAGE 186 static void if_vmove(struct ifnet *, struct vnet *); 187 #endif 188 189 #ifdef INET6 190 /* 191 * XXX: declare here to avoid to include many inet6 related files.. 192 * should be more generalized? 193 */ 194 extern void nd6_setmtu(struct ifnet *); 195 #endif 196 197 /* ipsec helper hooks */ 198 VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]); 199 VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]); 200 201 VNET_DEFINE(int, if_index); 202 int ifqmaxlen = IFQ_MAXLEN; 203 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */ 204 VNET_DEFINE(struct ifgrouphead, ifg_head); 205 206 static VNET_DEFINE(int, if_indexlim) = 8; 207 208 /* Table of ifnet by index. */ 209 VNET_DEFINE(struct ifnet **, ifindex_table); 210 211 #define V_if_indexlim VNET(if_indexlim) 212 #define V_ifindex_table VNET(ifindex_table) 213 214 /* 215 * The global network interface list (V_ifnet) and related state (such as 216 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and 217 * an rwlock. Either may be acquired shared to stablize the list, but both 218 * must be acquired writable to modify the list. This model allows us to 219 * both stablize the interface list during interrupt thread processing, but 220 * also to stablize it over long-running ioctls, without introducing priority 221 * inversions and deadlocks. 222 */ 223 struct rwlock ifnet_rwlock; 224 RW_SYSINIT_FLAGS(ifnet_rw, &ifnet_rwlock, "ifnet_rw", RW_RECURSE); 225 struct sx ifnet_sxlock; 226 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE); 227 228 /* 229 * The allocation of network interfaces is a rather non-atomic affair; we 230 * need to select an index before we are ready to expose the interface for 231 * use, so will use this pointer value to indicate reservation. 232 */ 233 #define IFNET_HOLD (void *)(uintptr_t)(-1) 234 235 static if_com_alloc_t *if_com_alloc[256]; 236 static if_com_free_t *if_com_free[256]; 237 238 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals"); 239 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 240 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 241 242 struct ifnet * 243 ifnet_byindex_locked(u_short idx) 244 { 245 246 if (idx > V_if_index) 247 return (NULL); 248 if (V_ifindex_table[idx] == IFNET_HOLD) 249 return (NULL); 250 return (V_ifindex_table[idx]); 251 } 252 253 struct ifnet * 254 ifnet_byindex(u_short idx) 255 { 256 struct ifnet *ifp; 257 258 IFNET_RLOCK_NOSLEEP(); 259 ifp = ifnet_byindex_locked(idx); 260 IFNET_RUNLOCK_NOSLEEP(); 261 return (ifp); 262 } 263 264 struct ifnet * 265 ifnet_byindex_ref(u_short idx) 266 { 267 struct ifnet *ifp; 268 269 IFNET_RLOCK_NOSLEEP(); 270 ifp = ifnet_byindex_locked(idx); 271 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) { 272 IFNET_RUNLOCK_NOSLEEP(); 273 return (NULL); 274 } 275 if_ref(ifp); 276 IFNET_RUNLOCK_NOSLEEP(); 277 return (ifp); 278 } 279 280 /* 281 * Allocate an ifindex array entry; return 0 on success or an error on 282 * failure. 283 */ 284 static u_short 285 ifindex_alloc(void) 286 { 287 u_short idx; 288 289 IFNET_WLOCK_ASSERT(); 290 retry: 291 /* 292 * Try to find an empty slot below V_if_index. If we fail, take the 293 * next slot. 294 */ 295 for (idx = 1; idx <= V_if_index; idx++) { 296 if (V_ifindex_table[idx] == NULL) 297 break; 298 } 299 300 /* Catch if_index overflow. */ 301 if (idx >= V_if_indexlim) { 302 if_grow(); 303 goto retry; 304 } 305 if (idx > V_if_index) 306 V_if_index = idx; 307 return (idx); 308 } 309 310 static void 311 ifindex_free_locked(u_short idx) 312 { 313 314 IFNET_WLOCK_ASSERT(); 315 316 V_ifindex_table[idx] = NULL; 317 while (V_if_index > 0 && 318 V_ifindex_table[V_if_index] == NULL) 319 V_if_index--; 320 } 321 322 static void 323 ifindex_free(u_short idx) 324 { 325 326 IFNET_WLOCK(); 327 ifindex_free_locked(idx); 328 IFNET_WUNLOCK(); 329 } 330 331 static void 332 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp) 333 { 334 335 IFNET_WLOCK_ASSERT(); 336 337 V_ifindex_table[idx] = ifp; 338 } 339 340 static void 341 ifnet_setbyindex(u_short idx, struct ifnet *ifp) 342 { 343 344 IFNET_WLOCK(); 345 ifnet_setbyindex_locked(idx, ifp); 346 IFNET_WUNLOCK(); 347 } 348 349 struct ifaddr * 350 ifaddr_byindex(u_short idx) 351 { 352 struct ifnet *ifp; 353 struct ifaddr *ifa = NULL; 354 355 IFNET_RLOCK_NOSLEEP(); 356 ifp = ifnet_byindex_locked(idx); 357 if (ifp != NULL && (ifa = ifp->if_addr) != NULL) 358 ifa_ref(ifa); 359 IFNET_RUNLOCK_NOSLEEP(); 360 return (ifa); 361 } 362 363 /* 364 * Network interface utility routines. 365 * 366 * Routines with ifa_ifwith* names take sockaddr *'s as 367 * parameters. 368 */ 369 370 static void 371 vnet_if_init(const void *unused __unused) 372 { 373 374 TAILQ_INIT(&V_ifnet); 375 TAILQ_INIT(&V_ifg_head); 376 IFNET_WLOCK(); 377 if_grow(); /* create initial table */ 378 IFNET_WUNLOCK(); 379 vnet_if_clone_init(); 380 } 381 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init, 382 NULL); 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); 398 399 static void 400 vnet_if_return(const void *unused __unused) 401 { 402 struct ifnet *ifp, *nifp; 403 404 /* Return all inherited interfaces to their parent vnets. */ 405 TAILQ_FOREACH_SAFE(ifp, &V_ifnet, if_link, nifp) { 406 if (ifp->if_home_vnet != ifp->if_vnet) 407 if_vmove(ifp, ifp->if_home_vnet); 408 } 409 } 410 VNET_SYSUNINIT(vnet_if_return, SI_SUB_VNET_DONE, SI_ORDER_ANY, 411 vnet_if_return, NULL); 412 #endif 413 414 static void 415 if_grow(void) 416 { 417 int oldlim; 418 u_int n; 419 struct ifnet **e; 420 421 IFNET_WLOCK_ASSERT(); 422 oldlim = V_if_indexlim; 423 IFNET_WUNLOCK(); 424 n = (oldlim << 1) * sizeof(*e); 425 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO); 426 IFNET_WLOCK(); 427 if (V_if_indexlim != oldlim) { 428 free(e, M_IFNET); 429 return; 430 } 431 if (V_ifindex_table != NULL) { 432 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2); 433 free((caddr_t)V_ifindex_table, M_IFNET); 434 } 435 V_if_indexlim <<= 1; 436 V_ifindex_table = e; 437 } 438 439 /* 440 * Allocate a struct ifnet and an index for an interface. A layer 2 441 * common structure will also be allocated if an allocation routine is 442 * registered for the passed type. 443 */ 444 struct ifnet * 445 if_alloc(u_char type) 446 { 447 struct ifnet *ifp; 448 u_short idx; 449 450 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO); 451 IFNET_WLOCK(); 452 idx = ifindex_alloc(); 453 ifnet_setbyindex_locked(idx, IFNET_HOLD); 454 IFNET_WUNLOCK(); 455 ifp->if_index = idx; 456 ifp->if_type = type; 457 ifp->if_alloctype = type; 458 if (if_com_alloc[type] != NULL) { 459 ifp->if_l2com = if_com_alloc[type](type, ifp); 460 if (ifp->if_l2com == NULL) { 461 free(ifp, M_IFNET); 462 ifindex_free(idx); 463 return (NULL); 464 } 465 } 466 467 IF_ADDR_LOCK_INIT(ifp); 468 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp); 469 ifp->if_afdata_initialized = 0; 470 IF_AFDATA_LOCK_INIT(ifp); 471 TAILQ_INIT(&ifp->if_addrhead); 472 TAILQ_INIT(&ifp->if_multiaddrs); 473 TAILQ_INIT(&ifp->if_groups); 474 #ifdef MAC 475 mac_ifnet_init(ifp); 476 #endif 477 ifq_init(&ifp->if_snd, ifp); 478 479 refcount_init(&ifp->if_refcount, 1); /* Index reference. */ 480 for (int i = 0; i < IFCOUNTERS; i++) 481 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK); 482 ifp->if_get_counter = if_get_counter_default; 483 ifnet_setbyindex(ifp->if_index, ifp); 484 return (ifp); 485 } 486 487 /* 488 * Do the actual work of freeing a struct ifnet, and layer 2 common 489 * structure. This call is made when the last reference to an 490 * interface is released. 491 */ 492 static void 493 if_free_internal(struct ifnet *ifp) 494 { 495 496 KASSERT((ifp->if_flags & IFF_DYING), 497 ("if_free_internal: interface not dying")); 498 499 if (if_com_free[ifp->if_alloctype] != NULL) 500 if_com_free[ifp->if_alloctype](ifp->if_l2com, 501 ifp->if_alloctype); 502 503 #ifdef MAC 504 mac_ifnet_destroy(ifp); 505 #endif /* MAC */ 506 if (ifp->if_description != NULL) 507 free(ifp->if_description, M_IFDESCR); 508 IF_AFDATA_DESTROY(ifp); 509 IF_ADDR_LOCK_DESTROY(ifp); 510 ifq_delete(&ifp->if_snd); 511 512 for (int i = 0; i < IFCOUNTERS; i++) 513 counter_u64_free(ifp->if_counters[i]); 514 515 free(ifp, M_IFNET); 516 } 517 518 /* 519 * Deregister an interface and free the associated storage. 520 */ 521 void 522 if_free(struct ifnet *ifp) 523 { 524 525 ifp->if_flags |= IFF_DYING; /* XXX: Locking */ 526 527 CURVNET_SET_QUIET(ifp->if_vnet); 528 IFNET_WLOCK(); 529 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index), 530 ("%s: freeing unallocated ifnet", ifp->if_xname)); 531 532 ifindex_free_locked(ifp->if_index); 533 IFNET_WUNLOCK(); 534 535 if (refcount_release(&ifp->if_refcount)) 536 if_free_internal(ifp); 537 CURVNET_RESTORE(); 538 } 539 540 /* 541 * Interfaces to keep an ifnet type-stable despite the possibility of the 542 * driver calling if_free(). If there are additional references, we defer 543 * freeing the underlying data structure. 544 */ 545 void 546 if_ref(struct ifnet *ifp) 547 { 548 549 /* We don't assert the ifnet list lock here, but arguably should. */ 550 refcount_acquire(&ifp->if_refcount); 551 } 552 553 void 554 if_rele(struct ifnet *ifp) 555 { 556 557 if (!refcount_release(&ifp->if_refcount)) 558 return; 559 if_free_internal(ifp); 560 } 561 562 void 563 ifq_init(struct ifaltq *ifq, struct ifnet *ifp) 564 { 565 566 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF); 567 568 if (ifq->ifq_maxlen == 0) 569 ifq->ifq_maxlen = ifqmaxlen; 570 571 ifq->altq_type = 0; 572 ifq->altq_disc = NULL; 573 ifq->altq_flags &= ALTQF_CANTCHANGE; 574 ifq->altq_tbr = NULL; 575 ifq->altq_ifp = ifp; 576 } 577 578 void 579 ifq_delete(struct ifaltq *ifq) 580 { 581 mtx_destroy(&ifq->ifq_mtx); 582 } 583 584 /* 585 * Perform generic interface initialization tasks and attach the interface 586 * to the list of "active" interfaces. If vmove flag is set on entry 587 * to if_attach_internal(), perform only a limited subset of initialization 588 * tasks, given that we are moving from one vnet to another an ifnet which 589 * has already been fully initialized. 590 * 591 * Note that if_detach_internal() removes group membership unconditionally 592 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL. 593 * Thus, when if_vmove() is applied to a cloned interface, group membership 594 * is lost while a cloned one always joins a group whose name is 595 * ifc->ifc_name. To recover this after if_detach_internal() and 596 * if_attach_internal(), the cloner should be specified to 597 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal() 598 * attempts to join a group whose name is ifc->ifc_name. 599 * 600 * XXX: 601 * - The decision to return void and thus require this function to 602 * succeed is questionable. 603 * - We should probably do more sanity checking. For instance we don't 604 * do anything to insure if_xname is unique or non-empty. 605 */ 606 void 607 if_attach(struct ifnet *ifp) 608 { 609 610 if_attach_internal(ifp, 0, NULL); 611 } 612 613 /* 614 * Compute the least common TSO limit. 615 */ 616 void 617 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax) 618 { 619 /* 620 * 1) If there is no limit currently, take the limit from 621 * the network adapter. 622 * 623 * 2) If the network adapter has a limit below the current 624 * limit, apply it. 625 */ 626 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 && 627 ifp->if_hw_tsomax < pmax->tsomaxbytes)) { 628 pmax->tsomaxbytes = ifp->if_hw_tsomax; 629 } 630 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 && 631 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) { 632 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount; 633 } 634 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 && 635 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) { 636 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize; 637 } 638 } 639 640 /* 641 * Update TSO limit of a network adapter. 642 * 643 * Returns zero if no change. Else non-zero. 644 */ 645 int 646 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax) 647 { 648 int retval = 0; 649 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) { 650 ifp->if_hw_tsomax = pmax->tsomaxbytes; 651 retval++; 652 } 653 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) { 654 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize; 655 retval++; 656 } 657 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) { 658 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount; 659 retval++; 660 } 661 return (retval); 662 } 663 664 static void 665 if_attach_internal(struct ifnet *ifp, int vmove, struct if_clone *ifc) 666 { 667 unsigned socksize, ifasize; 668 int namelen, masklen; 669 struct sockaddr_dl *sdl; 670 struct ifaddr *ifa; 671 672 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index)) 673 panic ("%s: BUG: if_attach called without if_alloc'd input()\n", 674 ifp->if_xname); 675 676 #ifdef VIMAGE 677 ifp->if_vnet = curvnet; 678 if (ifp->if_home_vnet == NULL) 679 ifp->if_home_vnet = curvnet; 680 #endif 681 682 if_addgroup(ifp, IFG_ALL); 683 684 /* Restore group membership for cloned interfaces. */ 685 if (vmove && ifc != NULL) 686 if_clone_addgroup(ifp, ifc); 687 688 getmicrotime(&ifp->if_lastchange); 689 ifp->if_epoch = time_uptime; 690 691 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) || 692 (ifp->if_transmit != NULL && ifp->if_qflush != NULL), 693 ("transmit and qflush must both either be set or both be NULL")); 694 if (ifp->if_transmit == NULL) { 695 ifp->if_transmit = if_transmit; 696 ifp->if_qflush = if_qflush; 697 } 698 if (ifp->if_input == NULL) 699 ifp->if_input = if_input_default; 700 701 if (ifp->if_requestencap == NULL) 702 ifp->if_requestencap = if_requestencap_default; 703 704 if (!vmove) { 705 #ifdef MAC 706 mac_ifnet_create(ifp); 707 #endif 708 709 /* 710 * Create a Link Level name for this device. 711 */ 712 namelen = strlen(ifp->if_xname); 713 /* 714 * Always save enough space for any possiable name so we 715 * can do a rename in place later. 716 */ 717 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ; 718 socksize = masklen + ifp->if_addrlen; 719 if (socksize < sizeof(*sdl)) 720 socksize = sizeof(*sdl); 721 socksize = roundup2(socksize, sizeof(long)); 722 ifasize = sizeof(*ifa) + 2 * socksize; 723 ifa = ifa_alloc(ifasize, M_WAITOK); 724 sdl = (struct sockaddr_dl *)(ifa + 1); 725 sdl->sdl_len = socksize; 726 sdl->sdl_family = AF_LINK; 727 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 728 sdl->sdl_nlen = namelen; 729 sdl->sdl_index = ifp->if_index; 730 sdl->sdl_type = ifp->if_type; 731 ifp->if_addr = ifa; 732 ifa->ifa_ifp = ifp; 733 ifa->ifa_rtrequest = link_rtrequest; 734 ifa->ifa_addr = (struct sockaddr *)sdl; 735 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 736 ifa->ifa_netmask = (struct sockaddr *)sdl; 737 sdl->sdl_len = masklen; 738 while (namelen != 0) 739 sdl->sdl_data[--namelen] = 0xff; 740 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link); 741 /* Reliably crash if used uninitialized. */ 742 ifp->if_broadcastaddr = NULL; 743 744 #if defined(INET) || defined(INET6) 745 /* Use defaults for TSO, if nothing is set */ 746 if (ifp->if_hw_tsomax == 0 && 747 ifp->if_hw_tsomaxsegcount == 0 && 748 ifp->if_hw_tsomaxsegsize == 0) { 749 /* 750 * The TSO defaults needs to be such that an 751 * NFS mbuf list of 35 mbufs totalling just 752 * below 64K works and that a chain of mbufs 753 * can be defragged into at most 32 segments: 754 */ 755 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) - 756 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN)); 757 ifp->if_hw_tsomaxsegcount = 35; 758 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */ 759 760 /* XXX some drivers set IFCAP_TSO after ethernet attach */ 761 if (ifp->if_capabilities & IFCAP_TSO) { 762 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n", 763 ifp->if_hw_tsomax, 764 ifp->if_hw_tsomaxsegcount, 765 ifp->if_hw_tsomaxsegsize); 766 } 767 } 768 #endif 769 } 770 #ifdef VIMAGE 771 else { 772 /* 773 * Update the interface index in the link layer address 774 * of the interface. 775 */ 776 for (ifa = ifp->if_addr; ifa != NULL; 777 ifa = TAILQ_NEXT(ifa, ifa_link)) { 778 if (ifa->ifa_addr->sa_family == AF_LINK) { 779 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 780 sdl->sdl_index = ifp->if_index; 781 } 782 } 783 } 784 #endif 785 786 IFNET_WLOCK(); 787 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link); 788 #ifdef VIMAGE 789 curvnet->vnet_ifcnt++; 790 #endif 791 IFNET_WUNLOCK(); 792 793 if (domain_init_status >= 2) 794 if_attachdomain1(ifp); 795 796 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 797 if (IS_DEFAULT_VNET(curvnet)) 798 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 799 800 /* Announce the interface. */ 801 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 802 } 803 804 static void 805 if_attachdomain(void *dummy) 806 { 807 struct ifnet *ifp; 808 809 TAILQ_FOREACH(ifp, &V_ifnet, if_link) 810 if_attachdomain1(ifp); 811 } 812 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND, 813 if_attachdomain, NULL); 814 815 static void 816 if_attachdomain1(struct ifnet *ifp) 817 { 818 struct domain *dp; 819 820 /* 821 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we 822 * cannot lock ifp->if_afdata initialization, entirely. 823 */ 824 if (IF_AFDATA_TRYLOCK(ifp) == 0) 825 return; 826 if (ifp->if_afdata_initialized >= domain_init_status) { 827 IF_AFDATA_UNLOCK(ifp); 828 log(LOG_WARNING, "%s called more than once on %s\n", 829 __func__, ifp->if_xname); 830 return; 831 } 832 ifp->if_afdata_initialized = domain_init_status; 833 IF_AFDATA_UNLOCK(ifp); 834 835 /* address family dependent data region */ 836 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 837 for (dp = domains; dp; dp = dp->dom_next) { 838 if (dp->dom_ifattach) 839 ifp->if_afdata[dp->dom_family] = 840 (*dp->dom_ifattach)(ifp); 841 } 842 } 843 844 /* 845 * Remove any unicast or broadcast network addresses from an interface. 846 */ 847 void 848 if_purgeaddrs(struct ifnet *ifp) 849 { 850 struct ifaddr *ifa, *next; 851 852 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) { 853 if (ifa->ifa_addr->sa_family == AF_LINK) 854 continue; 855 #ifdef INET 856 /* XXX: Ugly!! ad hoc just for INET */ 857 if (ifa->ifa_addr->sa_family == AF_INET) { 858 struct ifaliasreq ifr; 859 860 bzero(&ifr, sizeof(ifr)); 861 ifr.ifra_addr = *ifa->ifa_addr; 862 if (ifa->ifa_dstaddr) 863 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 864 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 865 NULL) == 0) 866 continue; 867 } 868 #endif /* INET */ 869 #ifdef INET6 870 if (ifa->ifa_addr->sa_family == AF_INET6) { 871 in6_purgeaddr(ifa); 872 /* ifp_addrhead is already updated */ 873 continue; 874 } 875 #endif /* INET6 */ 876 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 877 ifa_free(ifa); 878 } 879 } 880 881 /* 882 * Remove any multicast network addresses from an interface when an ifnet 883 * is going away. 884 */ 885 static void 886 if_purgemaddrs(struct ifnet *ifp) 887 { 888 struct ifmultiaddr *ifma; 889 struct ifmultiaddr *next; 890 891 IF_ADDR_WLOCK(ifp); 892 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 893 if_delmulti_locked(ifp, ifma, 1); 894 IF_ADDR_WUNLOCK(ifp); 895 } 896 897 /* 898 * Detach an interface, removing it from the list of "active" interfaces. 899 * If vmove flag is set on entry to if_detach_internal(), perform only a 900 * limited subset of cleanup tasks, given that we are moving an ifnet from 901 * one vnet to another, where it must be fully operational. 902 * 903 * XXXRW: There are some significant questions about event ordering, and 904 * how to prevent things from starting to use the interface during detach. 905 */ 906 void 907 if_detach(struct ifnet *ifp) 908 { 909 910 CURVNET_SET_QUIET(ifp->if_vnet); 911 if_detach_internal(ifp, 0, NULL); 912 CURVNET_RESTORE(); 913 } 914 915 static int 916 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp) 917 { 918 struct ifaddr *ifa; 919 int i; 920 struct domain *dp; 921 struct ifnet *iter; 922 int found = 0; 923 924 IFNET_WLOCK(); 925 TAILQ_FOREACH(iter, &V_ifnet, if_link) 926 if (iter == ifp) { 927 TAILQ_REMOVE(&V_ifnet, ifp, if_link); 928 found = 1; 929 break; 930 } 931 #ifdef VIMAGE 932 if (found) 933 curvnet->vnet_ifcnt--; 934 #endif 935 IFNET_WUNLOCK(); 936 if (!found) { 937 /* 938 * While we would want to panic here, we cannot 939 * guarantee that the interface is indeed still on 940 * the list given we don't hold locks all the way. 941 */ 942 return (ENOENT); 943 #if 0 944 if (vmove) 945 panic("%s: ifp=%p not on the ifnet tailq %p", 946 __func__, ifp, &V_ifnet); 947 else 948 return; /* XXX this should panic as well? */ 949 #endif 950 } 951 952 /* Check if this is a cloned interface or not. */ 953 if (vmove && ifcp != NULL) 954 *ifcp = if_clone_findifc(ifp); 955 956 /* 957 * Remove/wait for pending events. 958 */ 959 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 960 961 /* 962 * Remove routes and flush queues. 963 */ 964 if_down(ifp); 965 #ifdef ALTQ 966 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 967 altq_disable(&ifp->if_snd); 968 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 969 altq_detach(&ifp->if_snd); 970 #endif 971 972 if_purgeaddrs(ifp); 973 974 #ifdef INET 975 in_ifdetach(ifp); 976 #endif 977 978 #ifdef INET6 979 /* 980 * Remove all IPv6 kernel structs related to ifp. This should be done 981 * before removing routing entries below, since IPv6 interface direct 982 * routes are expected to be removed by the IPv6-specific kernel API. 983 * Otherwise, the kernel will detect some inconsistency and bark it. 984 */ 985 in6_ifdetach(ifp); 986 #endif 987 if_purgemaddrs(ifp); 988 989 /* Announce that the interface is gone. */ 990 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 991 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 992 if (IS_DEFAULT_VNET(curvnet)) 993 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 994 995 if (!vmove) { 996 /* 997 * Prevent further calls into the device driver via ifnet. 998 */ 999 if_dead(ifp); 1000 1001 /* 1002 * Remove link ifaddr pointer and maybe decrement if_index. 1003 * Clean up all addresses. 1004 */ 1005 ifp->if_addr = NULL; 1006 1007 /* We can now free link ifaddr. */ 1008 if (!TAILQ_EMPTY(&ifp->if_addrhead)) { 1009 ifa = TAILQ_FIRST(&ifp->if_addrhead); 1010 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 1011 ifa_free(ifa); 1012 } 1013 } 1014 1015 rt_flushifroutes(ifp); 1016 if_delgroups(ifp); 1017 1018 /* 1019 * We cannot hold the lock over dom_ifdetach calls as they might 1020 * sleep, for example trying to drain a callout, thus open up the 1021 * theoretical race with re-attaching. 1022 */ 1023 IF_AFDATA_LOCK(ifp); 1024 i = ifp->if_afdata_initialized; 1025 ifp->if_afdata_initialized = 0; 1026 IF_AFDATA_UNLOCK(ifp); 1027 for (dp = domains; i > 0 && dp; dp = dp->dom_next) { 1028 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 1029 (*dp->dom_ifdetach)(ifp, 1030 ifp->if_afdata[dp->dom_family]); 1031 } 1032 1033 return (0); 1034 } 1035 1036 #ifdef VIMAGE 1037 /* 1038 * if_vmove() performs a limited version of if_detach() in current 1039 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg. 1040 * An attempt is made to shrink if_index in current vnet, find an 1041 * unused if_index in target vnet and calls if_grow() if necessary, 1042 * and finally find an unused if_xname for the target vnet. 1043 */ 1044 void 1045 if_vmove(struct ifnet *ifp, struct vnet *new_vnet) 1046 { 1047 struct if_clone *ifc; 1048 u_int bif_dlt, bif_hdrlen; 1049 int rc; 1050 1051 /* 1052 * if_detach_internal() will call the eventhandler to notify 1053 * interface departure. That will detach if_bpf. We need to 1054 * safe the dlt and hdrlen so we can re-attach it later. 1055 */ 1056 bpf_get_bp_params(ifp->if_bpf, &bif_dlt, &bif_hdrlen); 1057 1058 /* 1059 * Detach from current vnet, but preserve LLADDR info, do not 1060 * mark as dead etc. so that the ifnet can be reattached later. 1061 * If we cannot find it, we lost the race to someone else. 1062 */ 1063 rc = if_detach_internal(ifp, 1, &ifc); 1064 if (rc != 0) 1065 return; 1066 1067 /* 1068 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink 1069 * the if_index for that vnet if possible. 1070 * 1071 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized, 1072 * or we'd lock on one vnet and unlock on another. 1073 */ 1074 IFNET_WLOCK(); 1075 ifindex_free_locked(ifp->if_index); 1076 IFNET_WUNLOCK(); 1077 1078 /* 1079 * Perform interface-specific reassignment tasks, if provided by 1080 * the driver. 1081 */ 1082 if (ifp->if_reassign != NULL) 1083 ifp->if_reassign(ifp, new_vnet, NULL); 1084 1085 /* 1086 * Switch to the context of the target vnet. 1087 */ 1088 CURVNET_SET_QUIET(new_vnet); 1089 1090 IFNET_WLOCK(); 1091 ifp->if_index = ifindex_alloc(); 1092 ifnet_setbyindex_locked(ifp->if_index, ifp); 1093 IFNET_WUNLOCK(); 1094 1095 if_attach_internal(ifp, 1, ifc); 1096 1097 if (ifp->if_bpf == NULL) 1098 bpfattach(ifp, bif_dlt, bif_hdrlen); 1099 1100 CURVNET_RESTORE(); 1101 } 1102 1103 /* 1104 * Move an ifnet to or from another child prison/vnet, specified by the jail id. 1105 */ 1106 static int 1107 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid) 1108 { 1109 struct prison *pr; 1110 struct ifnet *difp; 1111 1112 /* Try to find the prison within our visibility. */ 1113 sx_slock(&allprison_lock); 1114 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1115 sx_sunlock(&allprison_lock); 1116 if (pr == NULL) 1117 return (ENXIO); 1118 prison_hold_locked(pr); 1119 mtx_unlock(&pr->pr_mtx); 1120 1121 /* Do not try to move the iface from and to the same prison. */ 1122 if (pr->pr_vnet == ifp->if_vnet) { 1123 prison_free(pr); 1124 return (EEXIST); 1125 } 1126 1127 /* Make sure the named iface does not exists in the dst. prison/vnet. */ 1128 /* XXX Lock interfaces to avoid races. */ 1129 CURVNET_SET_QUIET(pr->pr_vnet); 1130 difp = ifunit(ifname); 1131 CURVNET_RESTORE(); 1132 if (difp != NULL) { 1133 prison_free(pr); 1134 return (EEXIST); 1135 } 1136 1137 /* Move the interface into the child jail/vnet. */ 1138 if_vmove(ifp, pr->pr_vnet); 1139 1140 /* Report the new if_xname back to the userland. */ 1141 sprintf(ifname, "%s", ifp->if_xname); 1142 1143 prison_free(pr); 1144 return (0); 1145 } 1146 1147 static int 1148 if_vmove_reclaim(struct thread *td, char *ifname, int jid) 1149 { 1150 struct prison *pr; 1151 struct vnet *vnet_dst; 1152 struct ifnet *ifp; 1153 1154 /* Try to find the prison within our visibility. */ 1155 sx_slock(&allprison_lock); 1156 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1157 sx_sunlock(&allprison_lock); 1158 if (pr == NULL) 1159 return (ENXIO); 1160 prison_hold_locked(pr); 1161 mtx_unlock(&pr->pr_mtx); 1162 1163 /* Make sure the named iface exists in the source prison/vnet. */ 1164 CURVNET_SET(pr->pr_vnet); 1165 ifp = ifunit(ifname); /* XXX Lock to avoid races. */ 1166 if (ifp == NULL) { 1167 CURVNET_RESTORE(); 1168 prison_free(pr); 1169 return (ENXIO); 1170 } 1171 1172 /* Do not try to move the iface from and to the same prison. */ 1173 vnet_dst = TD_TO_VNET(td); 1174 if (vnet_dst == ifp->if_vnet) { 1175 CURVNET_RESTORE(); 1176 prison_free(pr); 1177 return (EEXIST); 1178 } 1179 1180 /* Get interface back from child jail/vnet. */ 1181 if_vmove(ifp, vnet_dst); 1182 CURVNET_RESTORE(); 1183 1184 /* Report the new if_xname back to the userland. */ 1185 sprintf(ifname, "%s", ifp->if_xname); 1186 1187 prison_free(pr); 1188 return (0); 1189 } 1190 #endif /* VIMAGE */ 1191 1192 /* 1193 * Add a group to an interface 1194 */ 1195 int 1196 if_addgroup(struct ifnet *ifp, const char *groupname) 1197 { 1198 struct ifg_list *ifgl; 1199 struct ifg_group *ifg = NULL; 1200 struct ifg_member *ifgm; 1201 int new = 0; 1202 1203 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 1204 groupname[strlen(groupname) - 1] <= '9') 1205 return (EINVAL); 1206 1207 IFNET_WLOCK(); 1208 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1209 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) { 1210 IFNET_WUNLOCK(); 1211 return (EEXIST); 1212 } 1213 1214 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP, 1215 M_NOWAIT)) == NULL) { 1216 IFNET_WUNLOCK(); 1217 return (ENOMEM); 1218 } 1219 1220 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member), 1221 M_TEMP, M_NOWAIT)) == NULL) { 1222 free(ifgl, M_TEMP); 1223 IFNET_WUNLOCK(); 1224 return (ENOMEM); 1225 } 1226 1227 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1228 if (!strcmp(ifg->ifg_group, groupname)) 1229 break; 1230 1231 if (ifg == NULL) { 1232 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group), 1233 M_TEMP, M_NOWAIT)) == NULL) { 1234 free(ifgl, M_TEMP); 1235 free(ifgm, M_TEMP); 1236 IFNET_WUNLOCK(); 1237 return (ENOMEM); 1238 } 1239 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 1240 ifg->ifg_refcnt = 0; 1241 TAILQ_INIT(&ifg->ifg_members); 1242 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next); 1243 new = 1; 1244 } 1245 1246 ifg->ifg_refcnt++; 1247 ifgl->ifgl_group = ifg; 1248 ifgm->ifgm_ifp = ifp; 1249 1250 IF_ADDR_WLOCK(ifp); 1251 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 1252 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 1253 IF_ADDR_WUNLOCK(ifp); 1254 1255 IFNET_WUNLOCK(); 1256 1257 if (new) 1258 EVENTHANDLER_INVOKE(group_attach_event, ifg); 1259 EVENTHANDLER_INVOKE(group_change_event, groupname); 1260 1261 return (0); 1262 } 1263 1264 /* 1265 * Remove a group from an interface 1266 */ 1267 int 1268 if_delgroup(struct ifnet *ifp, const char *groupname) 1269 { 1270 struct ifg_list *ifgl; 1271 struct ifg_member *ifgm; 1272 1273 IFNET_WLOCK(); 1274 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1275 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1276 break; 1277 if (ifgl == NULL) { 1278 IFNET_WUNLOCK(); 1279 return (ENOENT); 1280 } 1281 1282 IF_ADDR_WLOCK(ifp); 1283 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1284 IF_ADDR_WUNLOCK(ifp); 1285 1286 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1287 if (ifgm->ifgm_ifp == ifp) 1288 break; 1289 1290 if (ifgm != NULL) { 1291 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 1292 free(ifgm, M_TEMP); 1293 } 1294 1295 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1296 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1297 IFNET_WUNLOCK(); 1298 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group); 1299 free(ifgl->ifgl_group, M_TEMP); 1300 } else 1301 IFNET_WUNLOCK(); 1302 1303 free(ifgl, M_TEMP); 1304 1305 EVENTHANDLER_INVOKE(group_change_event, groupname); 1306 1307 return (0); 1308 } 1309 1310 /* 1311 * Remove an interface from all groups 1312 */ 1313 static void 1314 if_delgroups(struct ifnet *ifp) 1315 { 1316 struct ifg_list *ifgl; 1317 struct ifg_member *ifgm; 1318 char groupname[IFNAMSIZ]; 1319 1320 IFNET_WLOCK(); 1321 while (!TAILQ_EMPTY(&ifp->if_groups)) { 1322 ifgl = TAILQ_FIRST(&ifp->if_groups); 1323 1324 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ); 1325 1326 IF_ADDR_WLOCK(ifp); 1327 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1328 IF_ADDR_WUNLOCK(ifp); 1329 1330 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1331 if (ifgm->ifgm_ifp == ifp) 1332 break; 1333 1334 if (ifgm != NULL) { 1335 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, 1336 ifgm_next); 1337 free(ifgm, M_TEMP); 1338 } 1339 1340 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1341 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1342 IFNET_WUNLOCK(); 1343 EVENTHANDLER_INVOKE(group_detach_event, 1344 ifgl->ifgl_group); 1345 free(ifgl->ifgl_group, M_TEMP); 1346 } else 1347 IFNET_WUNLOCK(); 1348 1349 free(ifgl, M_TEMP); 1350 1351 EVENTHANDLER_INVOKE(group_change_event, groupname); 1352 1353 IFNET_WLOCK(); 1354 } 1355 IFNET_WUNLOCK(); 1356 } 1357 1358 /* 1359 * Stores all groups from an interface in memory pointed 1360 * to by data 1361 */ 1362 static int 1363 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp) 1364 { 1365 int len, error; 1366 struct ifg_list *ifgl; 1367 struct ifg_req ifgrq, *ifgp; 1368 struct ifgroupreq *ifgr = data; 1369 1370 if (ifgr->ifgr_len == 0) { 1371 IF_ADDR_RLOCK(ifp); 1372 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1373 ifgr->ifgr_len += sizeof(struct ifg_req); 1374 IF_ADDR_RUNLOCK(ifp); 1375 return (0); 1376 } 1377 1378 len = ifgr->ifgr_len; 1379 ifgp = ifgr->ifgr_groups; 1380 /* XXX: wire */ 1381 IF_ADDR_RLOCK(ifp); 1382 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 1383 if (len < sizeof(ifgrq)) { 1384 IF_ADDR_RUNLOCK(ifp); 1385 return (EINVAL); 1386 } 1387 bzero(&ifgrq, sizeof ifgrq); 1388 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 1389 sizeof(ifgrq.ifgrq_group)); 1390 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1391 IF_ADDR_RUNLOCK(ifp); 1392 return (error); 1393 } 1394 len -= sizeof(ifgrq); 1395 ifgp++; 1396 } 1397 IF_ADDR_RUNLOCK(ifp); 1398 1399 return (0); 1400 } 1401 1402 /* 1403 * Stores all members of a group in memory pointed to by data 1404 */ 1405 static int 1406 if_getgroupmembers(struct ifgroupreq *data) 1407 { 1408 struct ifgroupreq *ifgr = data; 1409 struct ifg_group *ifg; 1410 struct ifg_member *ifgm; 1411 struct ifg_req ifgrq, *ifgp; 1412 int len, error; 1413 1414 IFNET_RLOCK(); 1415 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1416 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 1417 break; 1418 if (ifg == NULL) { 1419 IFNET_RUNLOCK(); 1420 return (ENOENT); 1421 } 1422 1423 if (ifgr->ifgr_len == 0) { 1424 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1425 ifgr->ifgr_len += sizeof(ifgrq); 1426 IFNET_RUNLOCK(); 1427 return (0); 1428 } 1429 1430 len = ifgr->ifgr_len; 1431 ifgp = ifgr->ifgr_groups; 1432 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1433 if (len < sizeof(ifgrq)) { 1434 IFNET_RUNLOCK(); 1435 return (EINVAL); 1436 } 1437 bzero(&ifgrq, sizeof ifgrq); 1438 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1439 sizeof(ifgrq.ifgrq_member)); 1440 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1441 IFNET_RUNLOCK(); 1442 return (error); 1443 } 1444 len -= sizeof(ifgrq); 1445 ifgp++; 1446 } 1447 IFNET_RUNLOCK(); 1448 1449 return (0); 1450 } 1451 1452 /* 1453 * Return counter values from counter(9)s stored in ifnet. 1454 */ 1455 uint64_t 1456 if_get_counter_default(struct ifnet *ifp, ift_counter cnt) 1457 { 1458 1459 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1460 1461 return (counter_u64_fetch(ifp->if_counters[cnt])); 1462 } 1463 1464 /* 1465 * Increase an ifnet counter. Usually used for counters shared 1466 * between the stack and a driver, but function supports them all. 1467 */ 1468 void 1469 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc) 1470 { 1471 1472 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1473 1474 counter_u64_add(ifp->if_counters[cnt], inc); 1475 } 1476 1477 /* 1478 * Copy data from ifnet to userland API structure if_data. 1479 */ 1480 void 1481 if_data_copy(struct ifnet *ifp, struct if_data *ifd) 1482 { 1483 1484 ifd->ifi_type = ifp->if_type; 1485 ifd->ifi_physical = 0; 1486 ifd->ifi_addrlen = ifp->if_addrlen; 1487 ifd->ifi_hdrlen = ifp->if_hdrlen; 1488 ifd->ifi_link_state = ifp->if_link_state; 1489 ifd->ifi_vhid = 0; 1490 ifd->ifi_datalen = sizeof(struct if_data); 1491 ifd->ifi_mtu = ifp->if_mtu; 1492 ifd->ifi_metric = ifp->if_metric; 1493 ifd->ifi_baudrate = ifp->if_baudrate; 1494 ifd->ifi_hwassist = ifp->if_hwassist; 1495 ifd->ifi_epoch = ifp->if_epoch; 1496 ifd->ifi_lastchange = ifp->if_lastchange; 1497 1498 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS); 1499 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS); 1500 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS); 1501 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS); 1502 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS); 1503 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES); 1504 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES); 1505 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS); 1506 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS); 1507 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS); 1508 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS); 1509 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO); 1510 } 1511 1512 /* 1513 * Wrapper functions for struct ifnet address list locking macros. These are 1514 * used by kernel modules to avoid encoding programming interface or binary 1515 * interface assumptions that may be violated when kernel-internal locking 1516 * approaches change. 1517 */ 1518 void 1519 if_addr_rlock(struct ifnet *ifp) 1520 { 1521 1522 IF_ADDR_RLOCK(ifp); 1523 } 1524 1525 void 1526 if_addr_runlock(struct ifnet *ifp) 1527 { 1528 1529 IF_ADDR_RUNLOCK(ifp); 1530 } 1531 1532 void 1533 if_maddr_rlock(if_t ifp) 1534 { 1535 1536 IF_ADDR_RLOCK((struct ifnet *)ifp); 1537 } 1538 1539 void 1540 if_maddr_runlock(if_t ifp) 1541 { 1542 1543 IF_ADDR_RUNLOCK((struct ifnet *)ifp); 1544 } 1545 1546 /* 1547 * Initialization, destruction and refcounting functions for ifaddrs. 1548 */ 1549 struct ifaddr * 1550 ifa_alloc(size_t size, int flags) 1551 { 1552 struct ifaddr *ifa; 1553 1554 KASSERT(size >= sizeof(struct ifaddr), 1555 ("%s: invalid size %zu", __func__, size)); 1556 1557 ifa = malloc(size, M_IFADDR, M_ZERO | flags); 1558 if (ifa == NULL) 1559 return (NULL); 1560 1561 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL) 1562 goto fail; 1563 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL) 1564 goto fail; 1565 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL) 1566 goto fail; 1567 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL) 1568 goto fail; 1569 1570 refcount_init(&ifa->ifa_refcnt, 1); 1571 1572 return (ifa); 1573 1574 fail: 1575 /* free(NULL) is okay */ 1576 counter_u64_free(ifa->ifa_opackets); 1577 counter_u64_free(ifa->ifa_ipackets); 1578 counter_u64_free(ifa->ifa_obytes); 1579 counter_u64_free(ifa->ifa_ibytes); 1580 free(ifa, M_IFADDR); 1581 1582 return (NULL); 1583 } 1584 1585 void 1586 ifa_ref(struct ifaddr *ifa) 1587 { 1588 1589 refcount_acquire(&ifa->ifa_refcnt); 1590 } 1591 1592 void 1593 ifa_free(struct ifaddr *ifa) 1594 { 1595 1596 if (refcount_release(&ifa->ifa_refcnt)) { 1597 counter_u64_free(ifa->ifa_opackets); 1598 counter_u64_free(ifa->ifa_ipackets); 1599 counter_u64_free(ifa->ifa_obytes); 1600 counter_u64_free(ifa->ifa_ibytes); 1601 free(ifa, M_IFADDR); 1602 } 1603 } 1604 1605 static int 1606 ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa, 1607 struct sockaddr *ia) 1608 { 1609 int error; 1610 struct rt_addrinfo info; 1611 struct sockaddr_dl null_sdl; 1612 struct ifnet *ifp; 1613 1614 ifp = ifa->ifa_ifp; 1615 1616 bzero(&info, sizeof(info)); 1617 if (cmd != RTM_DELETE) 1618 info.rti_ifp = V_loif; 1619 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; 1620 info.rti_info[RTAX_DST] = ia; 1621 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1622 link_init_sdl(ifp, (struct sockaddr *)&null_sdl, ifp->if_type); 1623 1624 error = rtrequest1_fib(cmd, &info, NULL, ifp->if_fib); 1625 1626 if (error != 0) 1627 log(LOG_DEBUG, "%s: %s failed for interface %s: %u\n", 1628 __func__, otype, if_name(ifp), error); 1629 1630 return (error); 1631 } 1632 1633 int 1634 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1635 { 1636 1637 return (ifa_maintain_loopback_route(RTM_ADD, "insertion", ifa, ia)); 1638 } 1639 1640 int 1641 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1642 { 1643 1644 return (ifa_maintain_loopback_route(RTM_DELETE, "deletion", ifa, ia)); 1645 } 1646 1647 int 1648 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1649 { 1650 1651 return (ifa_maintain_loopback_route(RTM_CHANGE, "switch", ifa, ia)); 1652 } 1653 1654 /* 1655 * XXX: Because sockaddr_dl has deeper structure than the sockaddr 1656 * structs used to represent other address families, it is necessary 1657 * to perform a different comparison. 1658 */ 1659 1660 #define sa_dl_equal(a1, a2) \ 1661 ((((const struct sockaddr_dl *)(a1))->sdl_len == \ 1662 ((const struct sockaddr_dl *)(a2))->sdl_len) && \ 1663 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \ 1664 CLLADDR((const struct sockaddr_dl *)(a2)), \ 1665 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0)) 1666 1667 /* 1668 * Locate an interface based on a complete address. 1669 */ 1670 /*ARGSUSED*/ 1671 static struct ifaddr * 1672 ifa_ifwithaddr_internal(const struct sockaddr *addr, int getref) 1673 { 1674 struct ifnet *ifp; 1675 struct ifaddr *ifa; 1676 1677 IFNET_RLOCK_NOSLEEP(); 1678 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1679 IF_ADDR_RLOCK(ifp); 1680 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1681 if (ifa->ifa_addr->sa_family != addr->sa_family) 1682 continue; 1683 if (sa_equal(addr, ifa->ifa_addr)) { 1684 if (getref) 1685 ifa_ref(ifa); 1686 IF_ADDR_RUNLOCK(ifp); 1687 goto done; 1688 } 1689 /* IP6 doesn't have broadcast */ 1690 if ((ifp->if_flags & IFF_BROADCAST) && 1691 ifa->ifa_broadaddr && 1692 ifa->ifa_broadaddr->sa_len != 0 && 1693 sa_equal(ifa->ifa_broadaddr, addr)) { 1694 if (getref) 1695 ifa_ref(ifa); 1696 IF_ADDR_RUNLOCK(ifp); 1697 goto done; 1698 } 1699 } 1700 IF_ADDR_RUNLOCK(ifp); 1701 } 1702 ifa = NULL; 1703 done: 1704 IFNET_RUNLOCK_NOSLEEP(); 1705 return (ifa); 1706 } 1707 1708 struct ifaddr * 1709 ifa_ifwithaddr(const struct sockaddr *addr) 1710 { 1711 1712 return (ifa_ifwithaddr_internal(addr, 1)); 1713 } 1714 1715 int 1716 ifa_ifwithaddr_check(const struct sockaddr *addr) 1717 { 1718 1719 return (ifa_ifwithaddr_internal(addr, 0) != NULL); 1720 } 1721 1722 /* 1723 * Locate an interface based on the broadcast address. 1724 */ 1725 /* ARGSUSED */ 1726 struct ifaddr * 1727 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum) 1728 { 1729 struct ifnet *ifp; 1730 struct ifaddr *ifa; 1731 1732 IFNET_RLOCK_NOSLEEP(); 1733 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1734 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1735 continue; 1736 IF_ADDR_RLOCK(ifp); 1737 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1738 if (ifa->ifa_addr->sa_family != addr->sa_family) 1739 continue; 1740 if ((ifp->if_flags & IFF_BROADCAST) && 1741 ifa->ifa_broadaddr && 1742 ifa->ifa_broadaddr->sa_len != 0 && 1743 sa_equal(ifa->ifa_broadaddr, addr)) { 1744 ifa_ref(ifa); 1745 IF_ADDR_RUNLOCK(ifp); 1746 goto done; 1747 } 1748 } 1749 IF_ADDR_RUNLOCK(ifp); 1750 } 1751 ifa = NULL; 1752 done: 1753 IFNET_RUNLOCK_NOSLEEP(); 1754 return (ifa); 1755 } 1756 1757 /* 1758 * Locate the point to point interface with a given destination address. 1759 */ 1760 /*ARGSUSED*/ 1761 struct ifaddr * 1762 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum) 1763 { 1764 struct ifnet *ifp; 1765 struct ifaddr *ifa; 1766 1767 IFNET_RLOCK_NOSLEEP(); 1768 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1769 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1770 continue; 1771 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1772 continue; 1773 IF_ADDR_RLOCK(ifp); 1774 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1775 if (ifa->ifa_addr->sa_family != addr->sa_family) 1776 continue; 1777 if (ifa->ifa_dstaddr != NULL && 1778 sa_equal(addr, ifa->ifa_dstaddr)) { 1779 ifa_ref(ifa); 1780 IF_ADDR_RUNLOCK(ifp); 1781 goto done; 1782 } 1783 } 1784 IF_ADDR_RUNLOCK(ifp); 1785 } 1786 ifa = NULL; 1787 done: 1788 IFNET_RUNLOCK_NOSLEEP(); 1789 return (ifa); 1790 } 1791 1792 /* 1793 * Find an interface on a specific network. If many, choice 1794 * is most specific found. 1795 */ 1796 struct ifaddr * 1797 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum) 1798 { 1799 struct ifnet *ifp; 1800 struct ifaddr *ifa; 1801 struct ifaddr *ifa_maybe = NULL; 1802 u_int af = addr->sa_family; 1803 const char *addr_data = addr->sa_data, *cplim; 1804 1805 /* 1806 * AF_LINK addresses can be looked up directly by their index number, 1807 * so do that if we can. 1808 */ 1809 if (af == AF_LINK) { 1810 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)addr; 1811 if (sdl->sdl_index && sdl->sdl_index <= V_if_index) 1812 return (ifaddr_byindex(sdl->sdl_index)); 1813 } 1814 1815 /* 1816 * Scan though each interface, looking for ones that have addresses 1817 * in this address family and the requested fib. Maintain a reference 1818 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that 1819 * kept it stable when we move onto the next interface. 1820 */ 1821 IFNET_RLOCK_NOSLEEP(); 1822 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1823 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1824 continue; 1825 IF_ADDR_RLOCK(ifp); 1826 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1827 const char *cp, *cp2, *cp3; 1828 1829 if (ifa->ifa_addr->sa_family != af) 1830 next: continue; 1831 if (af == AF_INET && 1832 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) { 1833 /* 1834 * This is a bit broken as it doesn't 1835 * take into account that the remote end may 1836 * be a single node in the network we are 1837 * looking for. 1838 * The trouble is that we don't know the 1839 * netmask for the remote end. 1840 */ 1841 if (ifa->ifa_dstaddr != NULL && 1842 sa_equal(addr, ifa->ifa_dstaddr)) { 1843 ifa_ref(ifa); 1844 IF_ADDR_RUNLOCK(ifp); 1845 goto done; 1846 } 1847 } else { 1848 /* 1849 * Scan all the bits in the ifa's address. 1850 * If a bit dissagrees with what we are 1851 * looking for, mask it with the netmask 1852 * to see if it really matters. 1853 * (A byte at a time) 1854 */ 1855 if (ifa->ifa_netmask == 0) 1856 continue; 1857 cp = addr_data; 1858 cp2 = ifa->ifa_addr->sa_data; 1859 cp3 = ifa->ifa_netmask->sa_data; 1860 cplim = ifa->ifa_netmask->sa_len 1861 + (char *)ifa->ifa_netmask; 1862 while (cp3 < cplim) 1863 if ((*cp++ ^ *cp2++) & *cp3++) 1864 goto next; /* next address! */ 1865 /* 1866 * If the netmask of what we just found 1867 * is more specific than what we had before 1868 * (if we had one), or if the virtual status 1869 * of new prefix is better than of the old one, 1870 * then remember the new one before continuing 1871 * to search for an even better one. 1872 */ 1873 if (ifa_maybe == NULL || 1874 ifa_preferred(ifa_maybe, ifa) || 1875 rn_refines((caddr_t)ifa->ifa_netmask, 1876 (caddr_t)ifa_maybe->ifa_netmask)) { 1877 if (ifa_maybe != NULL) 1878 ifa_free(ifa_maybe); 1879 ifa_maybe = ifa; 1880 ifa_ref(ifa_maybe); 1881 } 1882 } 1883 } 1884 IF_ADDR_RUNLOCK(ifp); 1885 } 1886 ifa = ifa_maybe; 1887 ifa_maybe = NULL; 1888 done: 1889 IFNET_RUNLOCK_NOSLEEP(); 1890 if (ifa_maybe != NULL) 1891 ifa_free(ifa_maybe); 1892 return (ifa); 1893 } 1894 1895 /* 1896 * Find an interface address specific to an interface best matching 1897 * a given address. 1898 */ 1899 struct ifaddr * 1900 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp) 1901 { 1902 struct ifaddr *ifa; 1903 const char *cp, *cp2, *cp3; 1904 char *cplim; 1905 struct ifaddr *ifa_maybe = NULL; 1906 u_int af = addr->sa_family; 1907 1908 if (af >= AF_MAX) 1909 return (NULL); 1910 IF_ADDR_RLOCK(ifp); 1911 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1912 if (ifa->ifa_addr->sa_family != af) 1913 continue; 1914 if (ifa_maybe == NULL) 1915 ifa_maybe = ifa; 1916 if (ifa->ifa_netmask == 0) { 1917 if (sa_equal(addr, ifa->ifa_addr) || 1918 (ifa->ifa_dstaddr && 1919 sa_equal(addr, ifa->ifa_dstaddr))) 1920 goto done; 1921 continue; 1922 } 1923 if (ifp->if_flags & IFF_POINTOPOINT) { 1924 if (sa_equal(addr, ifa->ifa_dstaddr)) 1925 goto done; 1926 } else { 1927 cp = addr->sa_data; 1928 cp2 = ifa->ifa_addr->sa_data; 1929 cp3 = ifa->ifa_netmask->sa_data; 1930 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1931 for (; cp3 < cplim; cp3++) 1932 if ((*cp++ ^ *cp2++) & *cp3) 1933 break; 1934 if (cp3 == cplim) 1935 goto done; 1936 } 1937 } 1938 ifa = ifa_maybe; 1939 done: 1940 if (ifa != NULL) 1941 ifa_ref(ifa); 1942 IF_ADDR_RUNLOCK(ifp); 1943 return (ifa); 1944 } 1945 1946 /* 1947 * See whether new ifa is better than current one: 1948 * 1) A non-virtual one is preferred over virtual. 1949 * 2) A virtual in master state preferred over any other state. 1950 * 1951 * Used in several address selecting functions. 1952 */ 1953 int 1954 ifa_preferred(struct ifaddr *cur, struct ifaddr *next) 1955 { 1956 1957 return (cur->ifa_carp && (!next->ifa_carp || 1958 ((*carp_master_p)(next) && !(*carp_master_p)(cur)))); 1959 } 1960 1961 #include <net/if_llatbl.h> 1962 1963 /* 1964 * Default action when installing a route with a Link Level gateway. 1965 * Lookup an appropriate real ifa to point to. 1966 * This should be moved to /sys/net/link.c eventually. 1967 */ 1968 static void 1969 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 1970 { 1971 struct ifaddr *ifa, *oifa; 1972 struct sockaddr *dst; 1973 struct ifnet *ifp; 1974 1975 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == NULL) || 1976 ((ifp = ifa->ifa_ifp) == NULL) || ((dst = rt_key(rt)) == NULL)) 1977 return; 1978 ifa = ifaof_ifpforaddr(dst, ifp); 1979 if (ifa) { 1980 oifa = rt->rt_ifa; 1981 rt->rt_ifa = ifa; 1982 ifa_free(oifa); 1983 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1984 ifa->ifa_rtrequest(cmd, rt, info); 1985 } 1986 } 1987 1988 struct sockaddr_dl * 1989 link_alloc_sdl(size_t size, int flags) 1990 { 1991 1992 return (malloc(size, M_TEMP, flags)); 1993 } 1994 1995 void 1996 link_free_sdl(struct sockaddr *sa) 1997 { 1998 free(sa, M_TEMP); 1999 } 2000 2001 /* 2002 * Fills in given sdl with interface basic info. 2003 * Returns pointer to filled sdl. 2004 */ 2005 struct sockaddr_dl * 2006 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype) 2007 { 2008 struct sockaddr_dl *sdl; 2009 2010 sdl = (struct sockaddr_dl *)paddr; 2011 memset(sdl, 0, sizeof(struct sockaddr_dl)); 2012 sdl->sdl_len = sizeof(struct sockaddr_dl); 2013 sdl->sdl_family = AF_LINK; 2014 sdl->sdl_index = ifp->if_index; 2015 sdl->sdl_type = iftype; 2016 2017 return (sdl); 2018 } 2019 2020 /* 2021 * Mark an interface down and notify protocols of 2022 * the transition. 2023 */ 2024 static void 2025 if_unroute(struct ifnet *ifp, int flag, int fam) 2026 { 2027 struct ifaddr *ifa; 2028 2029 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP")); 2030 2031 ifp->if_flags &= ~flag; 2032 getmicrotime(&ifp->if_lastchange); 2033 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2034 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2035 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 2036 ifp->if_qflush(ifp); 2037 2038 if (ifp->if_carp) 2039 (*carp_linkstate_p)(ifp); 2040 rt_ifmsg(ifp); 2041 } 2042 2043 /* 2044 * Mark an interface up and notify protocols of 2045 * the transition. 2046 */ 2047 static void 2048 if_route(struct ifnet *ifp, int flag, int fam) 2049 { 2050 struct ifaddr *ifa; 2051 2052 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP")); 2053 2054 ifp->if_flags |= flag; 2055 getmicrotime(&ifp->if_lastchange); 2056 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2057 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2058 pfctlinput(PRC_IFUP, ifa->ifa_addr); 2059 if (ifp->if_carp) 2060 (*carp_linkstate_p)(ifp); 2061 rt_ifmsg(ifp); 2062 #ifdef INET6 2063 in6_if_up(ifp); 2064 #endif 2065 } 2066 2067 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */ 2068 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */ 2069 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *); 2070 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t); 2071 int (*vlan_tag_p)(struct ifnet *, uint16_t *); 2072 int (*vlan_setcookie_p)(struct ifnet *, void *); 2073 void *(*vlan_cookie_p)(struct ifnet *); 2074 2075 /* 2076 * Handle a change in the interface link state. To avoid LORs 2077 * between driver lock and upper layer locks, as well as possible 2078 * recursions, we post event to taskqueue, and all job 2079 * is done in static do_link_state_change(). 2080 */ 2081 void 2082 if_link_state_change(struct ifnet *ifp, int link_state) 2083 { 2084 /* Return if state hasn't changed. */ 2085 if (ifp->if_link_state == link_state) 2086 return; 2087 2088 ifp->if_link_state = link_state; 2089 2090 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask); 2091 } 2092 2093 static void 2094 do_link_state_change(void *arg, int pending) 2095 { 2096 struct ifnet *ifp = (struct ifnet *)arg; 2097 int link_state = ifp->if_link_state; 2098 CURVNET_SET(ifp->if_vnet); 2099 2100 /* Notify that the link state has changed. */ 2101 rt_ifmsg(ifp); 2102 if (ifp->if_vlantrunk != NULL) 2103 (*vlan_link_state_p)(ifp); 2104 2105 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) && 2106 ifp->if_l2com != NULL) 2107 (*ng_ether_link_state_p)(ifp, link_state); 2108 if (ifp->if_carp) 2109 (*carp_linkstate_p)(ifp); 2110 if (ifp->if_bridge) 2111 (*bridge_linkstate_p)(ifp); 2112 if (ifp->if_lagg) 2113 (*lagg_linkstate_p)(ifp, link_state); 2114 2115 if (IS_DEFAULT_VNET(curvnet)) 2116 devctl_notify("IFNET", ifp->if_xname, 2117 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", 2118 NULL); 2119 if (pending > 1) 2120 if_printf(ifp, "%d link states coalesced\n", pending); 2121 if (log_link_state_change) 2122 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname, 2123 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" ); 2124 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, ifp->if_link_state); 2125 CURVNET_RESTORE(); 2126 } 2127 2128 /* 2129 * Mark an interface down and notify protocols of 2130 * the transition. 2131 */ 2132 void 2133 if_down(struct ifnet *ifp) 2134 { 2135 2136 if_unroute(ifp, IFF_UP, AF_UNSPEC); 2137 } 2138 2139 /* 2140 * Mark an interface up and notify protocols of 2141 * the transition. 2142 */ 2143 void 2144 if_up(struct ifnet *ifp) 2145 { 2146 2147 if_route(ifp, IFF_UP, AF_UNSPEC); 2148 } 2149 2150 /* 2151 * Flush an interface queue. 2152 */ 2153 void 2154 if_qflush(struct ifnet *ifp) 2155 { 2156 struct mbuf *m, *n; 2157 struct ifaltq *ifq; 2158 2159 ifq = &ifp->if_snd; 2160 IFQ_LOCK(ifq); 2161 #ifdef ALTQ 2162 if (ALTQ_IS_ENABLED(ifq)) 2163 ALTQ_PURGE(ifq); 2164 #endif 2165 n = ifq->ifq_head; 2166 while ((m = n) != NULL) { 2167 n = m->m_nextpkt; 2168 m_freem(m); 2169 } 2170 ifq->ifq_head = 0; 2171 ifq->ifq_tail = 0; 2172 ifq->ifq_len = 0; 2173 IFQ_UNLOCK(ifq); 2174 } 2175 2176 /* 2177 * Map interface name to interface structure pointer, with or without 2178 * returning a reference. 2179 */ 2180 struct ifnet * 2181 ifunit_ref(const char *name) 2182 { 2183 struct ifnet *ifp; 2184 2185 IFNET_RLOCK_NOSLEEP(); 2186 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2187 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 && 2188 !(ifp->if_flags & IFF_DYING)) 2189 break; 2190 } 2191 if (ifp != NULL) 2192 if_ref(ifp); 2193 IFNET_RUNLOCK_NOSLEEP(); 2194 return (ifp); 2195 } 2196 2197 struct ifnet * 2198 ifunit(const char *name) 2199 { 2200 struct ifnet *ifp; 2201 2202 IFNET_RLOCK_NOSLEEP(); 2203 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2204 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0) 2205 break; 2206 } 2207 IFNET_RUNLOCK_NOSLEEP(); 2208 return (ifp); 2209 } 2210 2211 /* 2212 * Hardware specific interface ioctls. 2213 */ 2214 static int 2215 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td) 2216 { 2217 struct ifreq *ifr; 2218 int error = 0; 2219 int new_flags, temp_flags; 2220 size_t namelen, onamelen; 2221 size_t descrlen; 2222 char *descrbuf, *odescrbuf; 2223 char new_name[IFNAMSIZ]; 2224 struct ifaddr *ifa; 2225 struct sockaddr_dl *sdl; 2226 2227 ifr = (struct ifreq *)data; 2228 switch (cmd) { 2229 case SIOCGIFINDEX: 2230 ifr->ifr_index = ifp->if_index; 2231 break; 2232 2233 case SIOCGIFFLAGS: 2234 temp_flags = ifp->if_flags | ifp->if_drv_flags; 2235 ifr->ifr_flags = temp_flags & 0xffff; 2236 ifr->ifr_flagshigh = temp_flags >> 16; 2237 break; 2238 2239 case SIOCGIFCAP: 2240 ifr->ifr_reqcap = ifp->if_capabilities; 2241 ifr->ifr_curcap = ifp->if_capenable; 2242 break; 2243 2244 #ifdef MAC 2245 case SIOCGIFMAC: 2246 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp); 2247 break; 2248 #endif 2249 2250 case SIOCGIFMETRIC: 2251 ifr->ifr_metric = ifp->if_metric; 2252 break; 2253 2254 case SIOCGIFMTU: 2255 ifr->ifr_mtu = ifp->if_mtu; 2256 break; 2257 2258 case SIOCGIFPHYS: 2259 /* XXXGL: did this ever worked? */ 2260 ifr->ifr_phys = 0; 2261 break; 2262 2263 case SIOCGIFDESCR: 2264 error = 0; 2265 sx_slock(&ifdescr_sx); 2266 if (ifp->if_description == NULL) 2267 error = ENOMSG; 2268 else { 2269 /* space for terminating nul */ 2270 descrlen = strlen(ifp->if_description) + 1; 2271 if (ifr->ifr_buffer.length < descrlen) 2272 ifr->ifr_buffer.buffer = NULL; 2273 else 2274 error = copyout(ifp->if_description, 2275 ifr->ifr_buffer.buffer, descrlen); 2276 ifr->ifr_buffer.length = descrlen; 2277 } 2278 sx_sunlock(&ifdescr_sx); 2279 break; 2280 2281 case SIOCSIFDESCR: 2282 error = priv_check(td, PRIV_NET_SETIFDESCR); 2283 if (error) 2284 return (error); 2285 2286 /* 2287 * Copy only (length-1) bytes to make sure that 2288 * if_description is always nul terminated. The 2289 * length parameter is supposed to count the 2290 * terminating nul in. 2291 */ 2292 if (ifr->ifr_buffer.length > ifdescr_maxlen) 2293 return (ENAMETOOLONG); 2294 else if (ifr->ifr_buffer.length == 0) 2295 descrbuf = NULL; 2296 else { 2297 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR, 2298 M_WAITOK | M_ZERO); 2299 error = copyin(ifr->ifr_buffer.buffer, descrbuf, 2300 ifr->ifr_buffer.length - 1); 2301 if (error) { 2302 free(descrbuf, M_IFDESCR); 2303 break; 2304 } 2305 } 2306 2307 sx_xlock(&ifdescr_sx); 2308 odescrbuf = ifp->if_description; 2309 ifp->if_description = descrbuf; 2310 sx_xunlock(&ifdescr_sx); 2311 2312 getmicrotime(&ifp->if_lastchange); 2313 free(odescrbuf, M_IFDESCR); 2314 break; 2315 2316 case SIOCGIFFIB: 2317 ifr->ifr_fib = ifp->if_fib; 2318 break; 2319 2320 case SIOCSIFFIB: 2321 error = priv_check(td, PRIV_NET_SETIFFIB); 2322 if (error) 2323 return (error); 2324 if (ifr->ifr_fib >= rt_numfibs) 2325 return (EINVAL); 2326 2327 ifp->if_fib = ifr->ifr_fib; 2328 break; 2329 2330 case SIOCSIFFLAGS: 2331 error = priv_check(td, PRIV_NET_SETIFFLAGS); 2332 if (error) 2333 return (error); 2334 /* 2335 * Currently, no driver owned flags pass the IFF_CANTCHANGE 2336 * check, so we don't need special handling here yet. 2337 */ 2338 new_flags = (ifr->ifr_flags & 0xffff) | 2339 (ifr->ifr_flagshigh << 16); 2340 if (ifp->if_flags & IFF_UP && 2341 (new_flags & IFF_UP) == 0) { 2342 if_down(ifp); 2343 } else if (new_flags & IFF_UP && 2344 (ifp->if_flags & IFF_UP) == 0) { 2345 if_up(ifp); 2346 } 2347 /* See if permanently promiscuous mode bit is about to flip */ 2348 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) { 2349 if (new_flags & IFF_PPROMISC) 2350 ifp->if_flags |= IFF_PROMISC; 2351 else if (ifp->if_pcount == 0) 2352 ifp->if_flags &= ~IFF_PROMISC; 2353 if (log_promisc_mode_change) 2354 log(LOG_INFO, "%s: permanently promiscuous mode %s\n", 2355 ifp->if_xname, 2356 ((new_flags & IFF_PPROMISC) ? 2357 "enabled" : "disabled")); 2358 } 2359 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 2360 (new_flags &~ IFF_CANTCHANGE); 2361 if (ifp->if_ioctl) { 2362 (void) (*ifp->if_ioctl)(ifp, cmd, data); 2363 } 2364 getmicrotime(&ifp->if_lastchange); 2365 break; 2366 2367 case SIOCSIFCAP: 2368 error = priv_check(td, PRIV_NET_SETIFCAP); 2369 if (error) 2370 return (error); 2371 if (ifp->if_ioctl == NULL) 2372 return (EOPNOTSUPP); 2373 if (ifr->ifr_reqcap & ~ifp->if_capabilities) 2374 return (EINVAL); 2375 error = (*ifp->if_ioctl)(ifp, cmd, data); 2376 if (error == 0) 2377 getmicrotime(&ifp->if_lastchange); 2378 break; 2379 2380 #ifdef MAC 2381 case SIOCSIFMAC: 2382 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp); 2383 break; 2384 #endif 2385 2386 case SIOCSIFNAME: 2387 error = priv_check(td, PRIV_NET_SETIFNAME); 2388 if (error) 2389 return (error); 2390 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 2391 if (error != 0) 2392 return (error); 2393 if (new_name[0] == '\0') 2394 return (EINVAL); 2395 if (new_name[IFNAMSIZ-1] != '\0') { 2396 new_name[IFNAMSIZ-1] = '\0'; 2397 if (strlen(new_name) == IFNAMSIZ-1) 2398 return (EINVAL); 2399 } 2400 if (ifunit(new_name) != NULL) 2401 return (EEXIST); 2402 2403 /* 2404 * XXX: Locking. Nothing else seems to lock if_flags, 2405 * and there are numerous other races with the 2406 * ifunit() checks not being atomic with namespace 2407 * changes (renames, vmoves, if_attach, etc). 2408 */ 2409 ifp->if_flags |= IFF_RENAMING; 2410 2411 /* Announce the departure of the interface. */ 2412 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 2413 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 2414 2415 log(LOG_INFO, "%s: changing name to '%s'\n", 2416 ifp->if_xname, new_name); 2417 2418 IF_ADDR_WLOCK(ifp); 2419 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 2420 ifa = ifp->if_addr; 2421 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 2422 namelen = strlen(new_name); 2423 onamelen = sdl->sdl_nlen; 2424 /* 2425 * Move the address if needed. This is safe because we 2426 * allocate space for a name of length IFNAMSIZ when we 2427 * create this in if_attach(). 2428 */ 2429 if (namelen != onamelen) { 2430 bcopy(sdl->sdl_data + onamelen, 2431 sdl->sdl_data + namelen, sdl->sdl_alen); 2432 } 2433 bcopy(new_name, sdl->sdl_data, namelen); 2434 sdl->sdl_nlen = namelen; 2435 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 2436 bzero(sdl->sdl_data, onamelen); 2437 while (namelen != 0) 2438 sdl->sdl_data[--namelen] = 0xff; 2439 IF_ADDR_WUNLOCK(ifp); 2440 2441 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 2442 /* Announce the return of the interface. */ 2443 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 2444 2445 ifp->if_flags &= ~IFF_RENAMING; 2446 break; 2447 2448 #ifdef VIMAGE 2449 case SIOCSIFVNET: 2450 error = priv_check(td, PRIV_NET_SETIFVNET); 2451 if (error) 2452 return (error); 2453 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid); 2454 break; 2455 #endif 2456 2457 case SIOCSIFMETRIC: 2458 error = priv_check(td, PRIV_NET_SETIFMETRIC); 2459 if (error) 2460 return (error); 2461 ifp->if_metric = ifr->ifr_metric; 2462 getmicrotime(&ifp->if_lastchange); 2463 break; 2464 2465 case SIOCSIFPHYS: 2466 error = priv_check(td, PRIV_NET_SETIFPHYS); 2467 if (error) 2468 return (error); 2469 if (ifp->if_ioctl == NULL) 2470 return (EOPNOTSUPP); 2471 error = (*ifp->if_ioctl)(ifp, cmd, data); 2472 if (error == 0) 2473 getmicrotime(&ifp->if_lastchange); 2474 break; 2475 2476 case SIOCSIFMTU: 2477 { 2478 u_long oldmtu = ifp->if_mtu; 2479 2480 error = priv_check(td, PRIV_NET_SETIFMTU); 2481 if (error) 2482 return (error); 2483 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) 2484 return (EINVAL); 2485 if (ifp->if_ioctl == NULL) 2486 return (EOPNOTSUPP); 2487 error = (*ifp->if_ioctl)(ifp, cmd, data); 2488 if (error == 0) { 2489 getmicrotime(&ifp->if_lastchange); 2490 rt_ifmsg(ifp); 2491 } 2492 /* 2493 * If the link MTU changed, do network layer specific procedure. 2494 */ 2495 if (ifp->if_mtu != oldmtu) { 2496 #ifdef INET6 2497 nd6_setmtu(ifp); 2498 #endif 2499 rt_updatemtu(ifp); 2500 } 2501 break; 2502 } 2503 2504 case SIOCADDMULTI: 2505 case SIOCDELMULTI: 2506 if (cmd == SIOCADDMULTI) 2507 error = priv_check(td, PRIV_NET_ADDMULTI); 2508 else 2509 error = priv_check(td, PRIV_NET_DELMULTI); 2510 if (error) 2511 return (error); 2512 2513 /* Don't allow group membership on non-multicast interfaces. */ 2514 if ((ifp->if_flags & IFF_MULTICAST) == 0) 2515 return (EOPNOTSUPP); 2516 2517 /* Don't let users screw up protocols' entries. */ 2518 if (ifr->ifr_addr.sa_family != AF_LINK) 2519 return (EINVAL); 2520 2521 if (cmd == SIOCADDMULTI) { 2522 struct ifmultiaddr *ifma; 2523 2524 /* 2525 * Userland is only permitted to join groups once 2526 * via the if_addmulti() KPI, because it cannot hold 2527 * struct ifmultiaddr * between calls. It may also 2528 * lose a race while we check if the membership 2529 * already exists. 2530 */ 2531 IF_ADDR_RLOCK(ifp); 2532 ifma = if_findmulti(ifp, &ifr->ifr_addr); 2533 IF_ADDR_RUNLOCK(ifp); 2534 if (ifma != NULL) 2535 error = EADDRINUSE; 2536 else 2537 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 2538 } else { 2539 error = if_delmulti(ifp, &ifr->ifr_addr); 2540 } 2541 if (error == 0) 2542 getmicrotime(&ifp->if_lastchange); 2543 break; 2544 2545 case SIOCSIFPHYADDR: 2546 case SIOCDIFPHYADDR: 2547 #ifdef INET6 2548 case SIOCSIFPHYADDR_IN6: 2549 #endif 2550 case SIOCSIFMEDIA: 2551 case SIOCSIFGENERIC: 2552 error = priv_check(td, PRIV_NET_HWIOCTL); 2553 if (error) 2554 return (error); 2555 if (ifp->if_ioctl == NULL) 2556 return (EOPNOTSUPP); 2557 error = (*ifp->if_ioctl)(ifp, cmd, data); 2558 if (error == 0) 2559 getmicrotime(&ifp->if_lastchange); 2560 break; 2561 2562 case SIOCGIFSTATUS: 2563 case SIOCGIFPSRCADDR: 2564 case SIOCGIFPDSTADDR: 2565 case SIOCGIFMEDIA: 2566 case SIOCGIFXMEDIA: 2567 case SIOCGIFGENERIC: 2568 if (ifp->if_ioctl == NULL) 2569 return (EOPNOTSUPP); 2570 error = (*ifp->if_ioctl)(ifp, cmd, data); 2571 break; 2572 2573 case SIOCSIFLLADDR: 2574 error = priv_check(td, PRIV_NET_SETLLADDR); 2575 if (error) 2576 return (error); 2577 error = if_setlladdr(ifp, 2578 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); 2579 break; 2580 2581 case SIOCAIFGROUP: 2582 { 2583 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2584 2585 error = priv_check(td, PRIV_NET_ADDIFGROUP); 2586 if (error) 2587 return (error); 2588 if ((error = if_addgroup(ifp, ifgr->ifgr_group))) 2589 return (error); 2590 break; 2591 } 2592 2593 case SIOCGIFGROUP: 2594 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp))) 2595 return (error); 2596 break; 2597 2598 case SIOCDIFGROUP: 2599 { 2600 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2601 2602 error = priv_check(td, PRIV_NET_DELIFGROUP); 2603 if (error) 2604 return (error); 2605 if ((error = if_delgroup(ifp, ifgr->ifgr_group))) 2606 return (error); 2607 break; 2608 } 2609 2610 default: 2611 error = ENOIOCTL; 2612 break; 2613 } 2614 return (error); 2615 } 2616 2617 #ifdef COMPAT_FREEBSD32 2618 struct ifconf32 { 2619 int32_t ifc_len; 2620 union { 2621 uint32_t ifcu_buf; 2622 uint32_t ifcu_req; 2623 } ifc_ifcu; 2624 }; 2625 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32) 2626 #endif 2627 2628 /* 2629 * Interface ioctls. 2630 */ 2631 int 2632 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td) 2633 { 2634 struct ifnet *ifp; 2635 struct ifreq *ifr; 2636 int error; 2637 int oif_flags; 2638 2639 CURVNET_SET(so->so_vnet); 2640 switch (cmd) { 2641 case SIOCGIFCONF: 2642 error = ifconf(cmd, data); 2643 CURVNET_RESTORE(); 2644 return (error); 2645 2646 #ifdef COMPAT_FREEBSD32 2647 case SIOCGIFCONF32: 2648 { 2649 struct ifconf32 *ifc32; 2650 struct ifconf ifc; 2651 2652 ifc32 = (struct ifconf32 *)data; 2653 ifc.ifc_len = ifc32->ifc_len; 2654 ifc.ifc_buf = PTRIN(ifc32->ifc_buf); 2655 2656 error = ifconf(SIOCGIFCONF, (void *)&ifc); 2657 CURVNET_RESTORE(); 2658 if (error == 0) 2659 ifc32->ifc_len = ifc.ifc_len; 2660 return (error); 2661 } 2662 #endif 2663 } 2664 ifr = (struct ifreq *)data; 2665 2666 switch (cmd) { 2667 #ifdef VIMAGE 2668 case SIOCSIFRVNET: 2669 error = priv_check(td, PRIV_NET_SETIFVNET); 2670 if (error == 0) 2671 error = if_vmove_reclaim(td, ifr->ifr_name, 2672 ifr->ifr_jid); 2673 CURVNET_RESTORE(); 2674 return (error); 2675 #endif 2676 case SIOCIFCREATE: 2677 case SIOCIFCREATE2: 2678 error = priv_check(td, PRIV_NET_IFCREATE); 2679 if (error == 0) 2680 error = if_clone_create(ifr->ifr_name, 2681 sizeof(ifr->ifr_name), 2682 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL); 2683 CURVNET_RESTORE(); 2684 return (error); 2685 case SIOCIFDESTROY: 2686 error = priv_check(td, PRIV_NET_IFDESTROY); 2687 if (error == 0) 2688 error = if_clone_destroy(ifr->ifr_name); 2689 CURVNET_RESTORE(); 2690 return (error); 2691 2692 case SIOCIFGCLONERS: 2693 error = if_clone_list((struct if_clonereq *)data); 2694 CURVNET_RESTORE(); 2695 return (error); 2696 case SIOCGIFGMEMB: 2697 error = if_getgroupmembers((struct ifgroupreq *)data); 2698 CURVNET_RESTORE(); 2699 return (error); 2700 #if defined(INET) || defined(INET6) 2701 case SIOCSVH: 2702 case SIOCGVH: 2703 if (carp_ioctl_p == NULL) 2704 error = EPROTONOSUPPORT; 2705 else 2706 error = (*carp_ioctl_p)(ifr, cmd, td); 2707 CURVNET_RESTORE(); 2708 return (error); 2709 #endif 2710 } 2711 2712 ifp = ifunit_ref(ifr->ifr_name); 2713 if (ifp == NULL) { 2714 CURVNET_RESTORE(); 2715 return (ENXIO); 2716 } 2717 2718 error = ifhwioctl(cmd, ifp, data, td); 2719 if (error != ENOIOCTL) { 2720 if_rele(ifp); 2721 CURVNET_RESTORE(); 2722 return (error); 2723 } 2724 2725 oif_flags = ifp->if_flags; 2726 if (so->so_proto == NULL) { 2727 if_rele(ifp); 2728 CURVNET_RESTORE(); 2729 return (EOPNOTSUPP); 2730 } 2731 2732 /* 2733 * Pass the request on to the socket control method, and if the 2734 * latter returns EOPNOTSUPP, directly to the interface. 2735 * 2736 * Make an exception for the legacy SIOCSIF* requests. Drivers 2737 * trust SIOCSIFADDR et al to come from an already privileged 2738 * layer, and do not perform any credentials checks or input 2739 * validation. 2740 */ 2741 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 2742 ifp, td)); 2743 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL && 2744 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR && 2745 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK) 2746 error = (*ifp->if_ioctl)(ifp, cmd, data); 2747 2748 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 2749 #ifdef INET6 2750 if (ifp->if_flags & IFF_UP) 2751 in6_if_up(ifp); 2752 #endif 2753 } 2754 if_rele(ifp); 2755 CURVNET_RESTORE(); 2756 return (error); 2757 } 2758 2759 /* 2760 * The code common to handling reference counted flags, 2761 * e.g., in ifpromisc() and if_allmulti(). 2762 * The "pflag" argument can specify a permanent mode flag to check, 2763 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none. 2764 * 2765 * Only to be used on stack-owned flags, not driver-owned flags. 2766 */ 2767 static int 2768 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch) 2769 { 2770 struct ifreq ifr; 2771 int error; 2772 int oldflags, oldcount; 2773 2774 /* Sanity checks to catch programming errors */ 2775 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0, 2776 ("%s: setting driver-owned flag %d", __func__, flag)); 2777 2778 if (onswitch) 2779 KASSERT(*refcount >= 0, 2780 ("%s: increment negative refcount %d for flag %d", 2781 __func__, *refcount, flag)); 2782 else 2783 KASSERT(*refcount > 0, 2784 ("%s: decrement non-positive refcount %d for flag %d", 2785 __func__, *refcount, flag)); 2786 2787 /* In case this mode is permanent, just touch refcount */ 2788 if (ifp->if_flags & pflag) { 2789 *refcount += onswitch ? 1 : -1; 2790 return (0); 2791 } 2792 2793 /* Save ifnet parameters for if_ioctl() may fail */ 2794 oldcount = *refcount; 2795 oldflags = ifp->if_flags; 2796 2797 /* 2798 * See if we aren't the only and touching refcount is enough. 2799 * Actually toggle interface flag if we are the first or last. 2800 */ 2801 if (onswitch) { 2802 if ((*refcount)++) 2803 return (0); 2804 ifp->if_flags |= flag; 2805 } else { 2806 if (--(*refcount)) 2807 return (0); 2808 ifp->if_flags &= ~flag; 2809 } 2810 2811 /* Call down the driver since we've changed interface flags */ 2812 if (ifp->if_ioctl == NULL) { 2813 error = EOPNOTSUPP; 2814 goto recover; 2815 } 2816 ifr.ifr_flags = ifp->if_flags & 0xffff; 2817 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2818 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 2819 if (error) 2820 goto recover; 2821 /* Notify userland that interface flags have changed */ 2822 rt_ifmsg(ifp); 2823 return (0); 2824 2825 recover: 2826 /* Recover after driver error */ 2827 *refcount = oldcount; 2828 ifp->if_flags = oldflags; 2829 return (error); 2830 } 2831 2832 /* 2833 * Set/clear promiscuous mode on interface ifp based on the truth value 2834 * of pswitch. The calls are reference counted so that only the first 2835 * "on" request actually has an effect, as does the final "off" request. 2836 * Results are undefined if the "off" and "on" requests are not matched. 2837 */ 2838 int 2839 ifpromisc(struct ifnet *ifp, int pswitch) 2840 { 2841 int error; 2842 int oldflags = ifp->if_flags; 2843 2844 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC, 2845 &ifp->if_pcount, pswitch); 2846 /* If promiscuous mode status has changed, log a message */ 2847 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) && 2848 log_promisc_mode_change) 2849 log(LOG_INFO, "%s: promiscuous mode %s\n", 2850 ifp->if_xname, 2851 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled"); 2852 return (error); 2853 } 2854 2855 /* 2856 * Return interface configuration 2857 * of system. List may be used 2858 * in later ioctl's (above) to get 2859 * other information. 2860 */ 2861 /*ARGSUSED*/ 2862 static int 2863 ifconf(u_long cmd, caddr_t data) 2864 { 2865 struct ifconf *ifc = (struct ifconf *)data; 2866 struct ifnet *ifp; 2867 struct ifaddr *ifa; 2868 struct ifreq ifr; 2869 struct sbuf *sb; 2870 int error, full = 0, valid_len, max_len; 2871 2872 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */ 2873 max_len = MAXPHYS - 1; 2874 2875 /* Prevent hostile input from being able to crash the system */ 2876 if (ifc->ifc_len <= 0) 2877 return (EINVAL); 2878 2879 again: 2880 if (ifc->ifc_len <= max_len) { 2881 max_len = ifc->ifc_len; 2882 full = 1; 2883 } 2884 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN); 2885 max_len = 0; 2886 valid_len = 0; 2887 2888 IFNET_RLOCK(); 2889 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2890 int addrs; 2891 2892 /* 2893 * Zero the ifr_name buffer to make sure we don't 2894 * disclose the contents of the stack. 2895 */ 2896 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name)); 2897 2898 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 2899 >= sizeof(ifr.ifr_name)) { 2900 sbuf_delete(sb); 2901 IFNET_RUNLOCK(); 2902 return (ENAMETOOLONG); 2903 } 2904 2905 addrs = 0; 2906 IF_ADDR_RLOCK(ifp); 2907 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2908 struct sockaddr *sa = ifa->ifa_addr; 2909 2910 if (prison_if(curthread->td_ucred, sa) != 0) 2911 continue; 2912 addrs++; 2913 if (sa->sa_len <= sizeof(*sa)) { 2914 ifr.ifr_addr = *sa; 2915 sbuf_bcat(sb, &ifr, sizeof(ifr)); 2916 max_len += sizeof(ifr); 2917 } else { 2918 sbuf_bcat(sb, &ifr, 2919 offsetof(struct ifreq, ifr_addr)); 2920 max_len += offsetof(struct ifreq, ifr_addr); 2921 sbuf_bcat(sb, sa, sa->sa_len); 2922 max_len += sa->sa_len; 2923 } 2924 2925 if (sbuf_error(sb) == 0) 2926 valid_len = sbuf_len(sb); 2927 } 2928 IF_ADDR_RUNLOCK(ifp); 2929 if (addrs == 0) { 2930 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr)); 2931 sbuf_bcat(sb, &ifr, sizeof(ifr)); 2932 max_len += sizeof(ifr); 2933 2934 if (sbuf_error(sb) == 0) 2935 valid_len = sbuf_len(sb); 2936 } 2937 } 2938 IFNET_RUNLOCK(); 2939 2940 /* 2941 * If we didn't allocate enough space (uncommon), try again. If 2942 * we have already allocated as much space as we are allowed, 2943 * return what we've got. 2944 */ 2945 if (valid_len != max_len && !full) { 2946 sbuf_delete(sb); 2947 goto again; 2948 } 2949 2950 ifc->ifc_len = valid_len; 2951 sbuf_finish(sb); 2952 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len); 2953 sbuf_delete(sb); 2954 return (error); 2955 } 2956 2957 /* 2958 * Just like ifpromisc(), but for all-multicast-reception mode. 2959 */ 2960 int 2961 if_allmulti(struct ifnet *ifp, int onswitch) 2962 { 2963 2964 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch)); 2965 } 2966 2967 struct ifmultiaddr * 2968 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa) 2969 { 2970 struct ifmultiaddr *ifma; 2971 2972 IF_ADDR_LOCK_ASSERT(ifp); 2973 2974 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2975 if (sa->sa_family == AF_LINK) { 2976 if (sa_dl_equal(ifma->ifma_addr, sa)) 2977 break; 2978 } else { 2979 if (sa_equal(ifma->ifma_addr, sa)) 2980 break; 2981 } 2982 } 2983 2984 return ifma; 2985 } 2986 2987 /* 2988 * Allocate a new ifmultiaddr and initialize based on passed arguments. We 2989 * make copies of passed sockaddrs. The ifmultiaddr will not be added to 2990 * the ifnet multicast address list here, so the caller must do that and 2991 * other setup work (such as notifying the device driver). The reference 2992 * count is initialized to 1. 2993 */ 2994 static struct ifmultiaddr * 2995 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa, 2996 int mflags) 2997 { 2998 struct ifmultiaddr *ifma; 2999 struct sockaddr *dupsa; 3000 3001 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags | 3002 M_ZERO); 3003 if (ifma == NULL) 3004 return (NULL); 3005 3006 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags); 3007 if (dupsa == NULL) { 3008 free(ifma, M_IFMADDR); 3009 return (NULL); 3010 } 3011 bcopy(sa, dupsa, sa->sa_len); 3012 ifma->ifma_addr = dupsa; 3013 3014 ifma->ifma_ifp = ifp; 3015 ifma->ifma_refcount = 1; 3016 ifma->ifma_protospec = NULL; 3017 3018 if (llsa == NULL) { 3019 ifma->ifma_lladdr = NULL; 3020 return (ifma); 3021 } 3022 3023 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags); 3024 if (dupsa == NULL) { 3025 free(ifma->ifma_addr, M_IFMADDR); 3026 free(ifma, M_IFMADDR); 3027 return (NULL); 3028 } 3029 bcopy(llsa, dupsa, llsa->sa_len); 3030 ifma->ifma_lladdr = dupsa; 3031 3032 return (ifma); 3033 } 3034 3035 /* 3036 * if_freemulti: free ifmultiaddr structure and possibly attached related 3037 * addresses. The caller is responsible for implementing reference 3038 * counting, notifying the driver, handling routing messages, and releasing 3039 * any dependent link layer state. 3040 */ 3041 static void 3042 if_freemulti(struct ifmultiaddr *ifma) 3043 { 3044 3045 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d", 3046 ifma->ifma_refcount)); 3047 3048 if (ifma->ifma_lladdr != NULL) 3049 free(ifma->ifma_lladdr, M_IFMADDR); 3050 free(ifma->ifma_addr, M_IFMADDR); 3051 free(ifma, M_IFMADDR); 3052 } 3053 3054 /* 3055 * Register an additional multicast address with a network interface. 3056 * 3057 * - If the address is already present, bump the reference count on the 3058 * address and return. 3059 * - If the address is not link-layer, look up a link layer address. 3060 * - Allocate address structures for one or both addresses, and attach to the 3061 * multicast address list on the interface. If automatically adding a link 3062 * layer address, the protocol address will own a reference to the link 3063 * layer address, to be freed when it is freed. 3064 * - Notify the network device driver of an addition to the multicast address 3065 * list. 3066 * 3067 * 'sa' points to caller-owned memory with the desired multicast address. 3068 * 3069 * 'retifma' will be used to return a pointer to the resulting multicast 3070 * address reference, if desired. 3071 */ 3072 int 3073 if_addmulti(struct ifnet *ifp, struct sockaddr *sa, 3074 struct ifmultiaddr **retifma) 3075 { 3076 struct ifmultiaddr *ifma, *ll_ifma; 3077 struct sockaddr *llsa; 3078 struct sockaddr_dl sdl; 3079 int error; 3080 3081 /* 3082 * If the address is already present, return a new reference to it; 3083 * otherwise, allocate storage and set up a new address. 3084 */ 3085 IF_ADDR_WLOCK(ifp); 3086 ifma = if_findmulti(ifp, sa); 3087 if (ifma != NULL) { 3088 ifma->ifma_refcount++; 3089 if (retifma != NULL) 3090 *retifma = ifma; 3091 IF_ADDR_WUNLOCK(ifp); 3092 return (0); 3093 } 3094 3095 /* 3096 * The address isn't already present; resolve the protocol address 3097 * into a link layer address, and then look that up, bump its 3098 * refcount or allocate an ifma for that also. 3099 * Most link layer resolving functions returns address data which 3100 * fits inside default sockaddr_dl structure. However callback 3101 * can allocate another sockaddr structure, in that case we need to 3102 * free it later. 3103 */ 3104 llsa = NULL; 3105 ll_ifma = NULL; 3106 if (ifp->if_resolvemulti != NULL) { 3107 /* Provide called function with buffer size information */ 3108 sdl.sdl_len = sizeof(sdl); 3109 llsa = (struct sockaddr *)&sdl; 3110 error = ifp->if_resolvemulti(ifp, &llsa, sa); 3111 if (error) 3112 goto unlock_out; 3113 } 3114 3115 /* 3116 * Allocate the new address. Don't hook it up yet, as we may also 3117 * need to allocate a link layer multicast address. 3118 */ 3119 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT); 3120 if (ifma == NULL) { 3121 error = ENOMEM; 3122 goto free_llsa_out; 3123 } 3124 3125 /* 3126 * If a link layer address is found, we'll need to see if it's 3127 * already present in the address list, or allocate is as well. 3128 * When this block finishes, the link layer address will be on the 3129 * list. 3130 */ 3131 if (llsa != NULL) { 3132 ll_ifma = if_findmulti(ifp, llsa); 3133 if (ll_ifma == NULL) { 3134 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT); 3135 if (ll_ifma == NULL) { 3136 --ifma->ifma_refcount; 3137 if_freemulti(ifma); 3138 error = ENOMEM; 3139 goto free_llsa_out; 3140 } 3141 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma, 3142 ifma_link); 3143 } else 3144 ll_ifma->ifma_refcount++; 3145 ifma->ifma_llifma = ll_ifma; 3146 } 3147 3148 /* 3149 * We now have a new multicast address, ifma, and possibly a new or 3150 * referenced link layer address. Add the primary address to the 3151 * ifnet address list. 3152 */ 3153 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 3154 3155 if (retifma != NULL) 3156 *retifma = ifma; 3157 3158 /* 3159 * Must generate the message while holding the lock so that 'ifma' 3160 * pointer is still valid. 3161 */ 3162 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 3163 IF_ADDR_WUNLOCK(ifp); 3164 3165 /* 3166 * We are certain we have added something, so call down to the 3167 * interface to let them know about it. 3168 */ 3169 if (ifp->if_ioctl != NULL) { 3170 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0); 3171 } 3172 3173 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3174 link_free_sdl(llsa); 3175 3176 return (0); 3177 3178 free_llsa_out: 3179 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3180 link_free_sdl(llsa); 3181 3182 unlock_out: 3183 IF_ADDR_WUNLOCK(ifp); 3184 return (error); 3185 } 3186 3187 /* 3188 * Delete a multicast group membership by network-layer group address. 3189 * 3190 * Returns ENOENT if the entry could not be found. If ifp no longer 3191 * exists, results are undefined. This entry point should only be used 3192 * from subsystems which do appropriate locking to hold ifp for the 3193 * duration of the call. 3194 * Network-layer protocol domains must use if_delmulti_ifma(). 3195 */ 3196 int 3197 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 3198 { 3199 struct ifmultiaddr *ifma; 3200 int lastref; 3201 #ifdef INVARIANTS 3202 struct ifnet *oifp; 3203 3204 IFNET_RLOCK_NOSLEEP(); 3205 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3206 if (ifp == oifp) 3207 break; 3208 if (ifp != oifp) 3209 ifp = NULL; 3210 IFNET_RUNLOCK_NOSLEEP(); 3211 3212 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__)); 3213 #endif 3214 if (ifp == NULL) 3215 return (ENOENT); 3216 3217 IF_ADDR_WLOCK(ifp); 3218 lastref = 0; 3219 ifma = if_findmulti(ifp, sa); 3220 if (ifma != NULL) 3221 lastref = if_delmulti_locked(ifp, ifma, 0); 3222 IF_ADDR_WUNLOCK(ifp); 3223 3224 if (ifma == NULL) 3225 return (ENOENT); 3226 3227 if (lastref && ifp->if_ioctl != NULL) { 3228 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3229 } 3230 3231 return (0); 3232 } 3233 3234 /* 3235 * Delete all multicast group membership for an interface. 3236 * Should be used to quickly flush all multicast filters. 3237 */ 3238 void 3239 if_delallmulti(struct ifnet *ifp) 3240 { 3241 struct ifmultiaddr *ifma; 3242 struct ifmultiaddr *next; 3243 3244 IF_ADDR_WLOCK(ifp); 3245 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 3246 if_delmulti_locked(ifp, ifma, 0); 3247 IF_ADDR_WUNLOCK(ifp); 3248 } 3249 3250 /* 3251 * Delete a multicast group membership by group membership pointer. 3252 * Network-layer protocol domains must use this routine. 3253 * 3254 * It is safe to call this routine if the ifp disappeared. 3255 */ 3256 void 3257 if_delmulti_ifma(struct ifmultiaddr *ifma) 3258 { 3259 struct ifnet *ifp; 3260 int lastref; 3261 3262 ifp = ifma->ifma_ifp; 3263 #ifdef DIAGNOSTIC 3264 if (ifp == NULL) { 3265 printf("%s: ifma_ifp seems to be detached\n", __func__); 3266 } else { 3267 struct ifnet *oifp; 3268 3269 IFNET_RLOCK_NOSLEEP(); 3270 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3271 if (ifp == oifp) 3272 break; 3273 if (ifp != oifp) { 3274 printf("%s: ifnet %p disappeared\n", __func__, ifp); 3275 ifp = NULL; 3276 } 3277 IFNET_RUNLOCK_NOSLEEP(); 3278 } 3279 #endif 3280 /* 3281 * If and only if the ifnet instance exists: Acquire the address lock. 3282 */ 3283 if (ifp != NULL) 3284 IF_ADDR_WLOCK(ifp); 3285 3286 lastref = if_delmulti_locked(ifp, ifma, 0); 3287 3288 if (ifp != NULL) { 3289 /* 3290 * If and only if the ifnet instance exists: 3291 * Release the address lock. 3292 * If the group was left: update the hardware hash filter. 3293 */ 3294 IF_ADDR_WUNLOCK(ifp); 3295 if (lastref && ifp->if_ioctl != NULL) { 3296 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3297 } 3298 } 3299 } 3300 3301 /* 3302 * Perform deletion of network-layer and/or link-layer multicast address. 3303 * 3304 * Return 0 if the reference count was decremented. 3305 * Return 1 if the final reference was released, indicating that the 3306 * hardware hash filter should be reprogrammed. 3307 */ 3308 static int 3309 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching) 3310 { 3311 struct ifmultiaddr *ll_ifma; 3312 3313 if (ifp != NULL && ifma->ifma_ifp != NULL) { 3314 KASSERT(ifma->ifma_ifp == ifp, 3315 ("%s: inconsistent ifp %p", __func__, ifp)); 3316 IF_ADDR_WLOCK_ASSERT(ifp); 3317 } 3318 3319 ifp = ifma->ifma_ifp; 3320 3321 /* 3322 * If the ifnet is detaching, null out references to ifnet, 3323 * so that upper protocol layers will notice, and not attempt 3324 * to obtain locks for an ifnet which no longer exists. The 3325 * routing socket announcement must happen before the ifnet 3326 * instance is detached from the system. 3327 */ 3328 if (detaching) { 3329 #ifdef DIAGNOSTIC 3330 printf("%s: detaching ifnet instance %p\n", __func__, ifp); 3331 #endif 3332 /* 3333 * ifp may already be nulled out if we are being reentered 3334 * to delete the ll_ifma. 3335 */ 3336 if (ifp != NULL) { 3337 rt_newmaddrmsg(RTM_DELMADDR, ifma); 3338 ifma->ifma_ifp = NULL; 3339 } 3340 } 3341 3342 if (--ifma->ifma_refcount > 0) 3343 return 0; 3344 3345 /* 3346 * If this ifma is a network-layer ifma, a link-layer ifma may 3347 * have been associated with it. Release it first if so. 3348 */ 3349 ll_ifma = ifma->ifma_llifma; 3350 if (ll_ifma != NULL) { 3351 KASSERT(ifma->ifma_lladdr != NULL, 3352 ("%s: llifma w/o lladdr", __func__)); 3353 if (detaching) 3354 ll_ifma->ifma_ifp = NULL; /* XXX */ 3355 if (--ll_ifma->ifma_refcount == 0) { 3356 if (ifp != NULL) { 3357 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, 3358 ifma_link); 3359 } 3360 if_freemulti(ll_ifma); 3361 } 3362 } 3363 3364 if (ifp != NULL) 3365 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 3366 3367 if_freemulti(ifma); 3368 3369 /* 3370 * The last reference to this instance of struct ifmultiaddr 3371 * was released; the hardware should be notified of this change. 3372 */ 3373 return 1; 3374 } 3375 3376 /* 3377 * Set the link layer address on an interface. 3378 * 3379 * At this time we only support certain types of interfaces, 3380 * and we don't allow the length of the address to change. 3381 * 3382 * Set noinline to be dtrace-friendly 3383 */ 3384 __noinline int 3385 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 3386 { 3387 struct sockaddr_dl *sdl; 3388 struct ifaddr *ifa; 3389 struct ifreq ifr; 3390 3391 IF_ADDR_RLOCK(ifp); 3392 ifa = ifp->if_addr; 3393 if (ifa == NULL) { 3394 IF_ADDR_RUNLOCK(ifp); 3395 return (EINVAL); 3396 } 3397 ifa_ref(ifa); 3398 IF_ADDR_RUNLOCK(ifp); 3399 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 3400 if (sdl == NULL) { 3401 ifa_free(ifa); 3402 return (EINVAL); 3403 } 3404 if (len != sdl->sdl_alen) { /* don't allow length to change */ 3405 ifa_free(ifa); 3406 return (EINVAL); 3407 } 3408 switch (ifp->if_type) { 3409 case IFT_ETHER: 3410 case IFT_FDDI: 3411 case IFT_XETHER: 3412 case IFT_ISO88025: 3413 case IFT_L2VLAN: 3414 case IFT_BRIDGE: 3415 case IFT_ARCNET: 3416 case IFT_IEEE8023ADLAG: 3417 case IFT_IEEE80211: 3418 bcopy(lladdr, LLADDR(sdl), len); 3419 ifa_free(ifa); 3420 break; 3421 default: 3422 ifa_free(ifa); 3423 return (ENODEV); 3424 } 3425 3426 /* 3427 * If the interface is already up, we need 3428 * to re-init it in order to reprogram its 3429 * address filter. 3430 */ 3431 if ((ifp->if_flags & IFF_UP) != 0) { 3432 if (ifp->if_ioctl) { 3433 ifp->if_flags &= ~IFF_UP; 3434 ifr.ifr_flags = ifp->if_flags & 0xffff; 3435 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3436 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3437 ifp->if_flags |= IFF_UP; 3438 ifr.ifr_flags = ifp->if_flags & 0xffff; 3439 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3440 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3441 } 3442 } 3443 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 3444 return (0); 3445 } 3446 3447 /* 3448 * Compat function for handling basic encapsulation requests. 3449 * Not converted stacks (FDDI, IB, ..) supports traditional 3450 * output model: ARP (and other similar L2 protocols) are handled 3451 * inside output routine, arpresolve/nd6_resolve() returns MAC 3452 * address instead of full prepend. 3453 * 3454 * This function creates calculated header==MAC for IPv4/IPv6 and 3455 * returns EAFNOSUPPORT (which is then handled in ARP code) for other 3456 * address families. 3457 */ 3458 static int 3459 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req) 3460 { 3461 3462 if (req->rtype != IFENCAP_LL) 3463 return (EOPNOTSUPP); 3464 3465 if (req->bufsize < req->lladdr_len) 3466 return (ENOMEM); 3467 3468 switch (req->family) { 3469 case AF_INET: 3470 case AF_INET6: 3471 break; 3472 default: 3473 return (EAFNOSUPPORT); 3474 } 3475 3476 /* Copy lladdr to storage as is */ 3477 memmove(req->buf, req->lladdr, req->lladdr_len); 3478 req->bufsize = req->lladdr_len; 3479 req->lladdr_off = 0; 3480 3481 return (0); 3482 } 3483 3484 /* 3485 * The name argument must be a pointer to storage which will last as 3486 * long as the interface does. For physical devices, the result of 3487 * device_get_name(dev) is a good choice and for pseudo-devices a 3488 * static string works well. 3489 */ 3490 void 3491 if_initname(struct ifnet *ifp, const char *name, int unit) 3492 { 3493 ifp->if_dname = name; 3494 ifp->if_dunit = unit; 3495 if (unit != IF_DUNIT_NONE) 3496 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 3497 else 3498 strlcpy(ifp->if_xname, name, IFNAMSIZ); 3499 } 3500 3501 int 3502 if_printf(struct ifnet *ifp, const char * fmt, ...) 3503 { 3504 va_list ap; 3505 int retval; 3506 3507 retval = printf("%s: ", ifp->if_xname); 3508 va_start(ap, fmt); 3509 retval += vprintf(fmt, ap); 3510 va_end(ap); 3511 return (retval); 3512 } 3513 3514 void 3515 if_start(struct ifnet *ifp) 3516 { 3517 3518 (*(ifp)->if_start)(ifp); 3519 } 3520 3521 /* 3522 * Backwards compatibility interface for drivers 3523 * that have not implemented it 3524 */ 3525 static int 3526 if_transmit(struct ifnet *ifp, struct mbuf *m) 3527 { 3528 int error; 3529 3530 IFQ_HANDOFF(ifp, m, error); 3531 return (error); 3532 } 3533 3534 static void 3535 if_input_default(struct ifnet *ifp __unused, struct mbuf *m) 3536 { 3537 3538 m_freem(m); 3539 } 3540 3541 int 3542 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust) 3543 { 3544 int active = 0; 3545 3546 IF_LOCK(ifq); 3547 if (_IF_QFULL(ifq)) { 3548 IF_UNLOCK(ifq); 3549 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1); 3550 m_freem(m); 3551 return (0); 3552 } 3553 if (ifp != NULL) { 3554 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust); 3555 if (m->m_flags & (M_BCAST|M_MCAST)) 3556 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 3557 active = ifp->if_drv_flags & IFF_DRV_OACTIVE; 3558 } 3559 _IF_ENQUEUE(ifq, m); 3560 IF_UNLOCK(ifq); 3561 if (ifp != NULL && !active) 3562 (*(ifp)->if_start)(ifp); 3563 return (1); 3564 } 3565 3566 void 3567 if_register_com_alloc(u_char type, 3568 if_com_alloc_t *a, if_com_free_t *f) 3569 { 3570 3571 KASSERT(if_com_alloc[type] == NULL, 3572 ("if_register_com_alloc: %d already registered", type)); 3573 KASSERT(if_com_free[type] == NULL, 3574 ("if_register_com_alloc: %d free already registered", type)); 3575 3576 if_com_alloc[type] = a; 3577 if_com_free[type] = f; 3578 } 3579 3580 void 3581 if_deregister_com_alloc(u_char type) 3582 { 3583 3584 KASSERT(if_com_alloc[type] != NULL, 3585 ("if_deregister_com_alloc: %d not registered", type)); 3586 KASSERT(if_com_free[type] != NULL, 3587 ("if_deregister_com_alloc: %d free not registered", type)); 3588 if_com_alloc[type] = NULL; 3589 if_com_free[type] = NULL; 3590 } 3591 3592 /* API for driver access to network stack owned ifnet.*/ 3593 uint64_t 3594 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate) 3595 { 3596 uint64_t oldbrate; 3597 3598 oldbrate = ifp->if_baudrate; 3599 ifp->if_baudrate = baudrate; 3600 return (oldbrate); 3601 } 3602 3603 uint64_t 3604 if_getbaudrate(if_t ifp) 3605 { 3606 3607 return (((struct ifnet *)ifp)->if_baudrate); 3608 } 3609 3610 int 3611 if_setcapabilities(if_t ifp, int capabilities) 3612 { 3613 ((struct ifnet *)ifp)->if_capabilities = capabilities; 3614 return (0); 3615 } 3616 3617 int 3618 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit) 3619 { 3620 ((struct ifnet *)ifp)->if_capabilities |= setbit; 3621 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit; 3622 3623 return (0); 3624 } 3625 3626 int 3627 if_getcapabilities(if_t ifp) 3628 { 3629 return ((struct ifnet *)ifp)->if_capabilities; 3630 } 3631 3632 int 3633 if_setcapenable(if_t ifp, int capabilities) 3634 { 3635 ((struct ifnet *)ifp)->if_capenable = capabilities; 3636 return (0); 3637 } 3638 3639 int 3640 if_setcapenablebit(if_t ifp, int setcap, int clearcap) 3641 { 3642 if(setcap) 3643 ((struct ifnet *)ifp)->if_capenable |= setcap; 3644 if(clearcap) 3645 ((struct ifnet *)ifp)->if_capenable &= ~clearcap; 3646 3647 return (0); 3648 } 3649 3650 const char * 3651 if_getdname(if_t ifp) 3652 { 3653 return ((struct ifnet *)ifp)->if_dname; 3654 } 3655 3656 int 3657 if_togglecapenable(if_t ifp, int togglecap) 3658 { 3659 ((struct ifnet *)ifp)->if_capenable ^= togglecap; 3660 return (0); 3661 } 3662 3663 int 3664 if_getcapenable(if_t ifp) 3665 { 3666 return ((struct ifnet *)ifp)->if_capenable; 3667 } 3668 3669 /* 3670 * This is largely undesirable because it ties ifnet to a device, but does 3671 * provide flexiblity for an embedded product vendor. Should be used with 3672 * the understanding that it violates the interface boundaries, and should be 3673 * a last resort only. 3674 */ 3675 int 3676 if_setdev(if_t ifp, void *dev) 3677 { 3678 return (0); 3679 } 3680 3681 int 3682 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags) 3683 { 3684 ((struct ifnet *)ifp)->if_drv_flags |= set_flags; 3685 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags; 3686 3687 return (0); 3688 } 3689 3690 int 3691 if_getdrvflags(if_t ifp) 3692 { 3693 return ((struct ifnet *)ifp)->if_drv_flags; 3694 } 3695 3696 int 3697 if_setdrvflags(if_t ifp, int flags) 3698 { 3699 ((struct ifnet *)ifp)->if_drv_flags = flags; 3700 return (0); 3701 } 3702 3703 3704 int 3705 if_setflags(if_t ifp, int flags) 3706 { 3707 ((struct ifnet *)ifp)->if_flags = flags; 3708 return (0); 3709 } 3710 3711 int 3712 if_setflagbits(if_t ifp, int set, int clear) 3713 { 3714 ((struct ifnet *)ifp)->if_flags |= set; 3715 ((struct ifnet *)ifp)->if_flags &= ~clear; 3716 3717 return (0); 3718 } 3719 3720 int 3721 if_getflags(if_t ifp) 3722 { 3723 return ((struct ifnet *)ifp)->if_flags; 3724 } 3725 3726 int 3727 if_clearhwassist(if_t ifp) 3728 { 3729 ((struct ifnet *)ifp)->if_hwassist = 0; 3730 return (0); 3731 } 3732 3733 int 3734 if_sethwassistbits(if_t ifp, int toset, int toclear) 3735 { 3736 ((struct ifnet *)ifp)->if_hwassist |= toset; 3737 ((struct ifnet *)ifp)->if_hwassist &= ~toclear; 3738 3739 return (0); 3740 } 3741 3742 int 3743 if_sethwassist(if_t ifp, int hwassist_bit) 3744 { 3745 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit; 3746 return (0); 3747 } 3748 3749 int 3750 if_gethwassist(if_t ifp) 3751 { 3752 return ((struct ifnet *)ifp)->if_hwassist; 3753 } 3754 3755 int 3756 if_setmtu(if_t ifp, int mtu) 3757 { 3758 ((struct ifnet *)ifp)->if_mtu = mtu; 3759 return (0); 3760 } 3761 3762 int 3763 if_getmtu(if_t ifp) 3764 { 3765 return ((struct ifnet *)ifp)->if_mtu; 3766 } 3767 3768 int 3769 if_getmtu_family(if_t ifp, int family) 3770 { 3771 struct domain *dp; 3772 3773 for (dp = domains; dp; dp = dp->dom_next) { 3774 if (dp->dom_family == family && dp->dom_ifmtu != NULL) 3775 return (dp->dom_ifmtu((struct ifnet *)ifp)); 3776 } 3777 3778 return (((struct ifnet *)ifp)->if_mtu); 3779 } 3780 3781 int 3782 if_setsoftc(if_t ifp, void *softc) 3783 { 3784 ((struct ifnet *)ifp)->if_softc = softc; 3785 return (0); 3786 } 3787 3788 void * 3789 if_getsoftc(if_t ifp) 3790 { 3791 return ((struct ifnet *)ifp)->if_softc; 3792 } 3793 3794 void 3795 if_setrcvif(struct mbuf *m, if_t ifp) 3796 { 3797 m->m_pkthdr.rcvif = (struct ifnet *)ifp; 3798 } 3799 3800 void 3801 if_setvtag(struct mbuf *m, uint16_t tag) 3802 { 3803 m->m_pkthdr.ether_vtag = tag; 3804 } 3805 3806 uint16_t 3807 if_getvtag(struct mbuf *m) 3808 { 3809 3810 return (m->m_pkthdr.ether_vtag); 3811 } 3812 3813 int 3814 if_sendq_empty(if_t ifp) 3815 { 3816 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd); 3817 } 3818 3819 struct ifaddr * 3820 if_getifaddr(if_t ifp) 3821 { 3822 return ((struct ifnet *)ifp)->if_addr; 3823 } 3824 3825 int 3826 if_getamcount(if_t ifp) 3827 { 3828 return ((struct ifnet *)ifp)->if_amcount; 3829 } 3830 3831 3832 int 3833 if_setsendqready(if_t ifp) 3834 { 3835 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd); 3836 return (0); 3837 } 3838 3839 int 3840 if_setsendqlen(if_t ifp, int tx_desc_count) 3841 { 3842 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count); 3843 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count; 3844 3845 return (0); 3846 } 3847 3848 int 3849 if_vlantrunkinuse(if_t ifp) 3850 { 3851 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0; 3852 } 3853 3854 int 3855 if_input(if_t ifp, struct mbuf* sendmp) 3856 { 3857 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp); 3858 return (0); 3859 3860 } 3861 3862 /* XXX */ 3863 #ifndef ETH_ADDR_LEN 3864 #define ETH_ADDR_LEN 6 3865 #endif 3866 3867 int 3868 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max) 3869 { 3870 struct ifmultiaddr *ifma; 3871 uint8_t *lmta = (uint8_t *)mta; 3872 int mcnt = 0; 3873 3874 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 3875 if (ifma->ifma_addr->sa_family != AF_LINK) 3876 continue; 3877 3878 if (mcnt == max) 3879 break; 3880 3881 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 3882 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN); 3883 mcnt++; 3884 } 3885 *cnt = mcnt; 3886 3887 return (0); 3888 } 3889 3890 int 3891 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max) 3892 { 3893 int error; 3894 3895 if_maddr_rlock(ifp); 3896 error = if_setupmultiaddr(ifp, mta, cnt, max); 3897 if_maddr_runlock(ifp); 3898 return (error); 3899 } 3900 3901 int 3902 if_multiaddr_count(if_t ifp, int max) 3903 { 3904 struct ifmultiaddr *ifma; 3905 int count; 3906 3907 count = 0; 3908 if_maddr_rlock(ifp); 3909 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 3910 if (ifma->ifma_addr->sa_family != AF_LINK) 3911 continue; 3912 count++; 3913 if (count == max) 3914 break; 3915 } 3916 if_maddr_runlock(ifp); 3917 return (count); 3918 } 3919 3920 int 3921 if_multi_apply(struct ifnet *ifp, int (*filter)(void *, struct ifmultiaddr *, int), void *arg) 3922 { 3923 struct ifmultiaddr *ifma; 3924 int cnt = 0; 3925 3926 if_maddr_rlock(ifp); 3927 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 3928 cnt += filter(arg, ifma, cnt); 3929 if_maddr_runlock(ifp); 3930 return (cnt); 3931 } 3932 3933 struct mbuf * 3934 if_dequeue(if_t ifp) 3935 { 3936 struct mbuf *m; 3937 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m); 3938 3939 return (m); 3940 } 3941 3942 int 3943 if_sendq_prepend(if_t ifp, struct mbuf *m) 3944 { 3945 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m); 3946 return (0); 3947 } 3948 3949 int 3950 if_setifheaderlen(if_t ifp, int len) 3951 { 3952 ((struct ifnet *)ifp)->if_hdrlen = len; 3953 return (0); 3954 } 3955 3956 caddr_t 3957 if_getlladdr(if_t ifp) 3958 { 3959 return (IF_LLADDR((struct ifnet *)ifp)); 3960 } 3961 3962 void * 3963 if_gethandle(u_char type) 3964 { 3965 return (if_alloc(type)); 3966 } 3967 3968 void 3969 if_bpfmtap(if_t ifh, struct mbuf *m) 3970 { 3971 struct ifnet *ifp = (struct ifnet *)ifh; 3972 3973 BPF_MTAP(ifp, m); 3974 } 3975 3976 void 3977 if_etherbpfmtap(if_t ifh, struct mbuf *m) 3978 { 3979 struct ifnet *ifp = (struct ifnet *)ifh; 3980 3981 ETHER_BPF_MTAP(ifp, m); 3982 } 3983 3984 void 3985 if_vlancap(if_t ifh) 3986 { 3987 struct ifnet *ifp = (struct ifnet *)ifh; 3988 VLAN_CAPABILITIES(ifp); 3989 } 3990 3991 void 3992 if_setinitfn(if_t ifp, void (*init_fn)(void *)) 3993 { 3994 ((struct ifnet *)ifp)->if_init = init_fn; 3995 } 3996 3997 void 3998 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t)) 3999 { 4000 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn; 4001 } 4002 4003 void 4004 if_setstartfn(if_t ifp, void (*start_fn)(if_t)) 4005 { 4006 ((struct ifnet *)ifp)->if_start = (void *)start_fn; 4007 } 4008 4009 void 4010 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn) 4011 { 4012 ((struct ifnet *)ifp)->if_transmit = start_fn; 4013 } 4014 4015 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn) 4016 { 4017 ((struct ifnet *)ifp)->if_qflush = flush_fn; 4018 4019 } 4020 4021 void 4022 if_setgetcounterfn(if_t ifp, if_get_counter_t fn) 4023 { 4024 4025 ifp->if_get_counter = fn; 4026 } 4027 4028 /* Revisit these - These are inline functions originally. */ 4029 int 4030 drbr_inuse_drv(if_t ifh, struct buf_ring *br) 4031 { 4032 return drbr_inuse(ifh, br); 4033 } 4034 4035 struct mbuf* 4036 drbr_dequeue_drv(if_t ifh, struct buf_ring *br) 4037 { 4038 return drbr_dequeue(ifh, br); 4039 } 4040 4041 int 4042 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br) 4043 { 4044 return drbr_needs_enqueue(ifh, br); 4045 } 4046 4047 int 4048 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m) 4049 { 4050 return drbr_enqueue(ifh, br, m); 4051 4052 } 4053