1 /*- 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)if.c 8.5 (Berkeley) 1/9/95 30 * $FreeBSD$ 31 */ 32 33 #include "opt_compat.h" 34 #include "opt_inet6.h" 35 #include "opt_inet.h" 36 37 #include <sys/param.h> 38 #include <sys/types.h> 39 #include <sys/conf.h> 40 #include <sys/malloc.h> 41 #include <sys/sbuf.h> 42 #include <sys/bus.h> 43 #include <sys/mbuf.h> 44 #include <sys/systm.h> 45 #include <sys/priv.h> 46 #include <sys/proc.h> 47 #include <sys/socket.h> 48 #include <sys/socketvar.h> 49 #include <sys/protosw.h> 50 #include <sys/kernel.h> 51 #include <sys/lock.h> 52 #include <sys/refcount.h> 53 #include <sys/module.h> 54 #include <sys/rwlock.h> 55 #include <sys/sockio.h> 56 #include <sys/syslog.h> 57 #include <sys/sysctl.h> 58 #include <sys/taskqueue.h> 59 #include <sys/domain.h> 60 #include <sys/jail.h> 61 #include <sys/priv.h> 62 63 #include <machine/stdarg.h> 64 #include <vm/uma.h> 65 66 #include <net/bpf.h> 67 #include <net/ethernet.h> 68 #include <net/if.h> 69 #include <net/if_arp.h> 70 #include <net/if_clone.h> 71 #include <net/if_dl.h> 72 #include <net/if_types.h> 73 #include <net/if_var.h> 74 #include <net/if_media.h> 75 #include <net/if_vlan_var.h> 76 #include <net/radix.h> 77 #include <net/route.h> 78 #include <net/vnet.h> 79 80 #if defined(INET) || defined(INET6) 81 #include <net/ethernet.h> 82 #include <netinet/in.h> 83 #include <netinet/in_var.h> 84 #include <netinet/ip.h> 85 #include <netinet/ip_carp.h> 86 #ifdef INET 87 #include <netinet/if_ether.h> 88 #endif /* INET */ 89 #ifdef INET6 90 #include <netinet6/in6_var.h> 91 #include <netinet6/in6_ifattach.h> 92 #endif /* INET6 */ 93 #endif /* INET || INET6 */ 94 95 #include <security/mac/mac_framework.h> 96 97 #ifdef COMPAT_FREEBSD32 98 #include <sys/mount.h> 99 #include <compat/freebsd32/freebsd32.h> 100 #endif 101 102 struct ifindex_entry { 103 struct ifnet *ife_ifnet; 104 }; 105 106 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers"); 107 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management"); 108 109 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN, 110 &ifqmaxlen, 0, "max send queue size"); 111 112 /* Log link state change events */ 113 static int log_link_state_change = 1; 114 115 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW, 116 &log_link_state_change, 0, 117 "log interface link state change events"); 118 119 /* Interface description */ 120 static unsigned int ifdescr_maxlen = 1024; 121 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW, 122 &ifdescr_maxlen, 0, 123 "administrative maximum length for interface description"); 124 125 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions"); 126 127 /* global sx for non-critical path ifdescr */ 128 static struct sx ifdescr_sx; 129 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr"); 130 131 void (*bridge_linkstate_p)(struct ifnet *ifp); 132 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state); 133 void (*lagg_linkstate_p)(struct ifnet *ifp, int state); 134 /* These are external hooks for CARP. */ 135 void (*carp_linkstate_p)(struct ifnet *ifp); 136 void (*carp_demote_adj_p)(int, char *); 137 int (*carp_master_p)(struct ifaddr *); 138 #if defined(INET) || defined(INET6) 139 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost); 140 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m, 141 const struct sockaddr *sa); 142 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *); 143 int (*carp_attach_p)(struct ifaddr *, int); 144 void (*carp_detach_p)(struct ifaddr *); 145 #endif 146 #ifdef INET 147 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **); 148 #endif 149 #ifdef INET6 150 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6); 151 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m, 152 const struct in6_addr *taddr); 153 #endif 154 155 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL; 156 157 /* 158 * XXX: Style; these should be sorted alphabetically, and unprototyped 159 * static functions should be prototyped. Currently they are sorted by 160 * declaration order. 161 */ 162 static void if_attachdomain(void *); 163 static void if_attachdomain1(struct ifnet *); 164 static int ifconf(u_long, caddr_t); 165 static void if_freemulti(struct ifmultiaddr *); 166 static void if_init(void *); 167 static void if_grow(void); 168 static void if_route(struct ifnet *, int flag, int fam); 169 static int if_setflag(struct ifnet *, int, int, int *, int); 170 static int if_transmit(struct ifnet *ifp, struct mbuf *m); 171 static void if_unroute(struct ifnet *, int flag, int fam); 172 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 173 static int if_rtdel(struct radix_node *, void *); 174 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *); 175 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int); 176 static void do_link_state_change(void *, int); 177 static int if_getgroup(struct ifgroupreq *, struct ifnet *); 178 static int if_getgroupmembers(struct ifgroupreq *); 179 static void if_delgroups(struct ifnet *); 180 static void if_attach_internal(struct ifnet *, int); 181 static void if_detach_internal(struct ifnet *, int); 182 183 #ifdef INET6 184 /* 185 * XXX: declare here to avoid to include many inet6 related files.. 186 * should be more generalized? 187 */ 188 extern void nd6_setmtu(struct ifnet *); 189 #endif 190 191 VNET_DEFINE(int, if_index); 192 int ifqmaxlen = IFQ_MAXLEN; 193 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */ 194 VNET_DEFINE(struct ifgrouphead, ifg_head); 195 196 static VNET_DEFINE(int, if_indexlim) = 8; 197 198 /* Table of ifnet by index. */ 199 VNET_DEFINE(struct ifindex_entry *, ifindex_table); 200 201 #define V_if_indexlim VNET(if_indexlim) 202 #define V_ifindex_table VNET(ifindex_table) 203 204 /* 205 * The global network interface list (V_ifnet) and related state (such as 206 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and 207 * an rwlock. Either may be acquired shared to stablize the list, but both 208 * must be acquired writable to modify the list. This model allows us to 209 * both stablize the interface list during interrupt thread processing, but 210 * also to stablize it over long-running ioctls, without introducing priority 211 * inversions and deadlocks. 212 */ 213 struct rwlock ifnet_rwlock; 214 struct sx ifnet_sxlock; 215 216 /* 217 * The allocation of network interfaces is a rather non-atomic affair; we 218 * need to select an index before we are ready to expose the interface for 219 * use, so will use this pointer value to indicate reservation. 220 */ 221 #define IFNET_HOLD (void *)(uintptr_t)(-1) 222 223 static if_com_alloc_t *if_com_alloc[256]; 224 static if_com_free_t *if_com_free[256]; 225 226 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals"); 227 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 228 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 229 230 struct ifnet * 231 ifnet_byindex_locked(u_short idx) 232 { 233 234 if (idx > V_if_index) 235 return (NULL); 236 if (V_ifindex_table[idx].ife_ifnet == IFNET_HOLD) 237 return (NULL); 238 return (V_ifindex_table[idx].ife_ifnet); 239 } 240 241 struct ifnet * 242 ifnet_byindex(u_short idx) 243 { 244 struct ifnet *ifp; 245 246 IFNET_RLOCK_NOSLEEP(); 247 ifp = ifnet_byindex_locked(idx); 248 IFNET_RUNLOCK_NOSLEEP(); 249 return (ifp); 250 } 251 252 struct ifnet * 253 ifnet_byindex_ref(u_short idx) 254 { 255 struct ifnet *ifp; 256 257 IFNET_RLOCK_NOSLEEP(); 258 ifp = ifnet_byindex_locked(idx); 259 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) { 260 IFNET_RUNLOCK_NOSLEEP(); 261 return (NULL); 262 } 263 if_ref(ifp); 264 IFNET_RUNLOCK_NOSLEEP(); 265 return (ifp); 266 } 267 268 /* 269 * Allocate an ifindex array entry; return 0 on success or an error on 270 * failure. 271 */ 272 static int 273 ifindex_alloc_locked(u_short *idxp) 274 { 275 u_short idx; 276 277 IFNET_WLOCK_ASSERT(); 278 279 retry: 280 /* 281 * Try to find an empty slot below V_if_index. If we fail, take the 282 * next slot. 283 */ 284 for (idx = 1; idx <= V_if_index; idx++) { 285 if (V_ifindex_table[idx].ife_ifnet == NULL) 286 break; 287 } 288 289 /* Catch if_index overflow. */ 290 if (idx >= V_if_indexlim) { 291 if_grow(); 292 goto retry; 293 } 294 if (idx > V_if_index) 295 V_if_index = idx; 296 *idxp = idx; 297 return (0); 298 } 299 300 static void 301 ifindex_free_locked(u_short idx) 302 { 303 304 IFNET_WLOCK_ASSERT(); 305 306 V_ifindex_table[idx].ife_ifnet = NULL; 307 while (V_if_index > 0 && 308 V_ifindex_table[V_if_index].ife_ifnet == NULL) 309 V_if_index--; 310 } 311 312 static void 313 ifindex_free(u_short idx) 314 { 315 316 IFNET_WLOCK(); 317 ifindex_free_locked(idx); 318 IFNET_WUNLOCK(); 319 } 320 321 static void 322 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp) 323 { 324 325 IFNET_WLOCK_ASSERT(); 326 327 V_ifindex_table[idx].ife_ifnet = ifp; 328 } 329 330 static void 331 ifnet_setbyindex(u_short idx, struct ifnet *ifp) 332 { 333 334 IFNET_WLOCK(); 335 ifnet_setbyindex_locked(idx, ifp); 336 IFNET_WUNLOCK(); 337 } 338 339 struct ifaddr * 340 ifaddr_byindex(u_short idx) 341 { 342 struct ifaddr *ifa; 343 344 IFNET_RLOCK_NOSLEEP(); 345 ifa = ifnet_byindex_locked(idx)->if_addr; 346 if (ifa != NULL) 347 ifa_ref(ifa); 348 IFNET_RUNLOCK_NOSLEEP(); 349 return (ifa); 350 } 351 352 /* 353 * Network interface utility routines. 354 * 355 * Routines with ifa_ifwith* names take sockaddr *'s as 356 * parameters. 357 */ 358 359 static void 360 vnet_if_init(const void *unused __unused) 361 { 362 363 TAILQ_INIT(&V_ifnet); 364 TAILQ_INIT(&V_ifg_head); 365 IFNET_WLOCK(); 366 if_grow(); /* create initial table */ 367 IFNET_WUNLOCK(); 368 vnet_if_clone_init(); 369 } 370 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init, 371 NULL); 372 373 /* ARGSUSED*/ 374 static void 375 if_init(void *dummy __unused) 376 { 377 378 IFNET_LOCK_INIT(); 379 if_clone_init(); 380 } 381 SYSINIT(interfaces, SI_SUB_INIT_IF, SI_ORDER_FIRST, if_init, NULL); 382 383 384 #ifdef VIMAGE 385 static void 386 vnet_if_uninit(const void *unused __unused) 387 { 388 389 VNET_ASSERT(TAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p " 390 "not empty", __func__, __LINE__, &V_ifnet)); 391 VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p " 392 "not empty", __func__, __LINE__, &V_ifg_head)); 393 394 free((caddr_t)V_ifindex_table, M_IFNET); 395 } 396 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST, 397 vnet_if_uninit, NULL); 398 #endif 399 400 static void 401 if_grow(void) 402 { 403 int oldlim; 404 u_int n; 405 struct ifindex_entry *e; 406 407 IFNET_WLOCK_ASSERT(); 408 oldlim = V_if_indexlim; 409 IFNET_WUNLOCK(); 410 n = (oldlim << 1) * sizeof(*e); 411 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO); 412 IFNET_WLOCK(); 413 if (V_if_indexlim != oldlim) { 414 free(e, M_IFNET); 415 return; 416 } 417 if (V_ifindex_table != NULL) { 418 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2); 419 free((caddr_t)V_ifindex_table, M_IFNET); 420 } 421 V_if_indexlim <<= 1; 422 V_ifindex_table = e; 423 } 424 425 /* 426 * Allocate a struct ifnet and an index for an interface. A layer 2 427 * common structure will also be allocated if an allocation routine is 428 * registered for the passed type. 429 */ 430 struct ifnet * 431 if_alloc(u_char type) 432 { 433 struct ifnet *ifp; 434 u_short idx; 435 436 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO); 437 IFNET_WLOCK(); 438 if (ifindex_alloc_locked(&idx) != 0) { 439 IFNET_WUNLOCK(); 440 free(ifp, M_IFNET); 441 return (NULL); 442 } 443 ifnet_setbyindex_locked(idx, IFNET_HOLD); 444 IFNET_WUNLOCK(); 445 ifp->if_index = idx; 446 ifp->if_type = type; 447 ifp->if_alloctype = type; 448 if (if_com_alloc[type] != NULL) { 449 ifp->if_l2com = if_com_alloc[type](type, ifp); 450 if (ifp->if_l2com == NULL) { 451 free(ifp, M_IFNET); 452 ifindex_free(idx); 453 return (NULL); 454 } 455 } 456 457 IF_ADDR_LOCK_INIT(ifp); 458 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp); 459 ifp->if_afdata_initialized = 0; 460 IF_AFDATA_LOCK_INIT(ifp); 461 TAILQ_INIT(&ifp->if_addrhead); 462 TAILQ_INIT(&ifp->if_multiaddrs); 463 TAILQ_INIT(&ifp->if_groups); 464 #ifdef MAC 465 mac_ifnet_init(ifp); 466 #endif 467 ifq_init(&ifp->if_snd, ifp); 468 469 refcount_init(&ifp->if_refcount, 1); /* Index reference. */ 470 for (int i = 0; i < IFCOUNTERS; i++) 471 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK); 472 ifp->if_get_counter = if_get_counter_default; 473 ifnet_setbyindex(ifp->if_index, ifp); 474 return (ifp); 475 } 476 477 /* 478 * Do the actual work of freeing a struct ifnet, and layer 2 common 479 * structure. This call is made when the last reference to an 480 * interface is released. 481 */ 482 static void 483 if_free_internal(struct ifnet *ifp) 484 { 485 486 KASSERT((ifp->if_flags & IFF_DYING), 487 ("if_free_internal: interface not dying")); 488 489 if (if_com_free[ifp->if_alloctype] != NULL) 490 if_com_free[ifp->if_alloctype](ifp->if_l2com, 491 ifp->if_alloctype); 492 493 #ifdef MAC 494 mac_ifnet_destroy(ifp); 495 #endif /* MAC */ 496 if (ifp->if_description != NULL) 497 free(ifp->if_description, M_IFDESCR); 498 IF_AFDATA_DESTROY(ifp); 499 IF_ADDR_LOCK_DESTROY(ifp); 500 ifq_delete(&ifp->if_snd); 501 502 for (int i = 0; i < IFCOUNTERS; i++) 503 counter_u64_free(ifp->if_counters[i]); 504 505 free(ifp, M_IFNET); 506 } 507 508 /* 509 * Deregister an interface and free the associated storage. 510 */ 511 void 512 if_free(struct ifnet *ifp) 513 { 514 515 ifp->if_flags |= IFF_DYING; /* XXX: Locking */ 516 517 CURVNET_SET_QUIET(ifp->if_vnet); 518 IFNET_WLOCK(); 519 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index), 520 ("%s: freeing unallocated ifnet", ifp->if_xname)); 521 522 ifindex_free_locked(ifp->if_index); 523 IFNET_WUNLOCK(); 524 525 if (refcount_release(&ifp->if_refcount)) 526 if_free_internal(ifp); 527 CURVNET_RESTORE(); 528 } 529 530 /* 531 * Interfaces to keep an ifnet type-stable despite the possibility of the 532 * driver calling if_free(). If there are additional references, we defer 533 * freeing the underlying data structure. 534 */ 535 void 536 if_ref(struct ifnet *ifp) 537 { 538 539 /* We don't assert the ifnet list lock here, but arguably should. */ 540 refcount_acquire(&ifp->if_refcount); 541 } 542 543 void 544 if_rele(struct ifnet *ifp) 545 { 546 547 if (!refcount_release(&ifp->if_refcount)) 548 return; 549 if_free_internal(ifp); 550 } 551 552 void 553 ifq_init(struct ifaltq *ifq, struct ifnet *ifp) 554 { 555 556 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF); 557 558 if (ifq->ifq_maxlen == 0) 559 ifq->ifq_maxlen = ifqmaxlen; 560 561 ifq->altq_type = 0; 562 ifq->altq_disc = NULL; 563 ifq->altq_flags &= ALTQF_CANTCHANGE; 564 ifq->altq_tbr = NULL; 565 ifq->altq_ifp = ifp; 566 } 567 568 void 569 ifq_delete(struct ifaltq *ifq) 570 { 571 mtx_destroy(&ifq->ifq_mtx); 572 } 573 574 /* 575 * Perform generic interface initalization tasks and attach the interface 576 * to the list of "active" interfaces. If vmove flag is set on entry 577 * to if_attach_internal(), perform only a limited subset of initialization 578 * tasks, given that we are moving from one vnet to another an ifnet which 579 * has already been fully initialized. 580 * 581 * XXX: 582 * - The decision to return void and thus require this function to 583 * succeed is questionable. 584 * - We should probably do more sanity checking. For instance we don't 585 * do anything to insure if_xname is unique or non-empty. 586 */ 587 void 588 if_attach(struct ifnet *ifp) 589 { 590 591 if_attach_internal(ifp, 0); 592 } 593 594 /* 595 * Compute the least common TSO limit. 596 */ 597 void 598 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax) 599 { 600 /* 601 * 1) If there is no limit currently, take the limit from 602 * the network adapter. 603 * 604 * 2) If the network adapter has a limit below the current 605 * limit, apply it. 606 */ 607 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 && 608 ifp->if_hw_tsomax < pmax->tsomaxbytes)) { 609 pmax->tsomaxbytes = ifp->if_hw_tsomax; 610 } 611 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 && 612 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) { 613 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount; 614 } 615 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 && 616 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) { 617 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize; 618 } 619 } 620 621 /* 622 * Update TSO limit of a network adapter. 623 * 624 * Returns zero if no change. Else non-zero. 625 */ 626 int 627 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax) 628 { 629 int retval = 0; 630 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) { 631 ifp->if_hw_tsomax = pmax->tsomaxbytes; 632 retval++; 633 } 634 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) { 635 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize; 636 retval++; 637 } 638 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) { 639 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount; 640 retval++; 641 } 642 return (retval); 643 } 644 645 static void 646 if_attach_internal(struct ifnet *ifp, int vmove) 647 { 648 unsigned socksize, ifasize; 649 int namelen, masklen; 650 struct sockaddr_dl *sdl; 651 struct ifaddr *ifa; 652 653 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index)) 654 panic ("%s: BUG: if_attach called without if_alloc'd input()\n", 655 ifp->if_xname); 656 657 #ifdef VIMAGE 658 ifp->if_vnet = curvnet; 659 if (ifp->if_home_vnet == NULL) 660 ifp->if_home_vnet = curvnet; 661 #endif 662 663 if_addgroup(ifp, IFG_ALL); 664 665 getmicrotime(&ifp->if_lastchange); 666 ifp->if_epoch = time_uptime; 667 668 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) || 669 (ifp->if_transmit != NULL && ifp->if_qflush != NULL), 670 ("transmit and qflush must both either be set or both be NULL")); 671 if (ifp->if_transmit == NULL) { 672 ifp->if_transmit = if_transmit; 673 ifp->if_qflush = if_qflush; 674 } 675 676 if (!vmove) { 677 #ifdef MAC 678 mac_ifnet_create(ifp); 679 #endif 680 681 /* 682 * Create a Link Level name for this device. 683 */ 684 namelen = strlen(ifp->if_xname); 685 /* 686 * Always save enough space for any possiable name so we 687 * can do a rename in place later. 688 */ 689 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ; 690 socksize = masklen + ifp->if_addrlen; 691 if (socksize < sizeof(*sdl)) 692 socksize = sizeof(*sdl); 693 socksize = roundup2(socksize, sizeof(long)); 694 ifasize = sizeof(*ifa) + 2 * socksize; 695 ifa = ifa_alloc(ifasize, M_WAITOK); 696 sdl = (struct sockaddr_dl *)(ifa + 1); 697 sdl->sdl_len = socksize; 698 sdl->sdl_family = AF_LINK; 699 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 700 sdl->sdl_nlen = namelen; 701 sdl->sdl_index = ifp->if_index; 702 sdl->sdl_type = ifp->if_type; 703 ifp->if_addr = ifa; 704 ifa->ifa_ifp = ifp; 705 ifa->ifa_rtrequest = link_rtrequest; 706 ifa->ifa_addr = (struct sockaddr *)sdl; 707 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 708 ifa->ifa_netmask = (struct sockaddr *)sdl; 709 sdl->sdl_len = masklen; 710 while (namelen != 0) 711 sdl->sdl_data[--namelen] = 0xff; 712 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link); 713 /* Reliably crash if used uninitialized. */ 714 ifp->if_broadcastaddr = NULL; 715 716 #if defined(INET) || defined(INET6) 717 /* Use defaults for TSO, if nothing is set */ 718 if (ifp->if_hw_tsomax == 0 && 719 ifp->if_hw_tsomaxsegcount == 0 && 720 ifp->if_hw_tsomaxsegsize == 0) { 721 /* 722 * The TSO defaults needs to be such that an 723 * NFS mbuf list of 35 mbufs totalling just 724 * below 64K works and that a chain of mbufs 725 * can be defragged into at most 32 segments: 726 */ 727 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) - 728 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN)); 729 ifp->if_hw_tsomaxsegcount = 35; 730 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */ 731 732 /* XXX some drivers set IFCAP_TSO after ethernet attach */ 733 if (ifp->if_capabilities & IFCAP_TSO) { 734 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n", 735 ifp->if_hw_tsomax, 736 ifp->if_hw_tsomaxsegcount, 737 ifp->if_hw_tsomaxsegsize); 738 } 739 } 740 /* 741 * If the "if_hw_tsomax" limit is set, check if it is 742 * too small: 743 */ 744 KASSERT(ifp->if_hw_tsomax == 0 || 745 ifp->if_hw_tsomax >= (IP_MAXPACKET / 8), 746 ("%s: if_hw_tsomax is outside of range", __func__)); 747 #endif 748 } 749 #ifdef VIMAGE 750 else { 751 /* 752 * Update the interface index in the link layer address 753 * of the interface. 754 */ 755 for (ifa = ifp->if_addr; ifa != NULL; 756 ifa = TAILQ_NEXT(ifa, ifa_link)) { 757 if (ifa->ifa_addr->sa_family == AF_LINK) { 758 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 759 sdl->sdl_index = ifp->if_index; 760 } 761 } 762 } 763 #endif 764 765 IFNET_WLOCK(); 766 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link); 767 #ifdef VIMAGE 768 curvnet->vnet_ifcnt++; 769 #endif 770 IFNET_WUNLOCK(); 771 772 if (domain_init_status >= 2) 773 if_attachdomain1(ifp); 774 775 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 776 if (IS_DEFAULT_VNET(curvnet)) 777 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 778 779 /* Announce the interface. */ 780 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 781 } 782 783 static void 784 if_attachdomain(void *dummy) 785 { 786 struct ifnet *ifp; 787 788 TAILQ_FOREACH(ifp, &V_ifnet, if_link) 789 if_attachdomain1(ifp); 790 } 791 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND, 792 if_attachdomain, NULL); 793 794 static void 795 if_attachdomain1(struct ifnet *ifp) 796 { 797 struct domain *dp; 798 799 /* 800 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we 801 * cannot lock ifp->if_afdata initialization, entirely. 802 */ 803 if (IF_AFDATA_TRYLOCK(ifp) == 0) 804 return; 805 if (ifp->if_afdata_initialized >= domain_init_status) { 806 IF_AFDATA_UNLOCK(ifp); 807 log(LOG_WARNING, "%s called more than once on %s\n", 808 __func__, ifp->if_xname); 809 return; 810 } 811 ifp->if_afdata_initialized = domain_init_status; 812 IF_AFDATA_UNLOCK(ifp); 813 814 /* address family dependent data region */ 815 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 816 for (dp = domains; dp; dp = dp->dom_next) { 817 if (dp->dom_ifattach) 818 ifp->if_afdata[dp->dom_family] = 819 (*dp->dom_ifattach)(ifp); 820 } 821 } 822 823 /* 824 * Remove any unicast or broadcast network addresses from an interface. 825 */ 826 void 827 if_purgeaddrs(struct ifnet *ifp) 828 { 829 struct ifaddr *ifa, *next; 830 831 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) { 832 if (ifa->ifa_addr->sa_family == AF_LINK) 833 continue; 834 #ifdef INET 835 /* XXX: Ugly!! ad hoc just for INET */ 836 if (ifa->ifa_addr->sa_family == AF_INET) { 837 struct ifaliasreq ifr; 838 839 bzero(&ifr, sizeof(ifr)); 840 ifr.ifra_addr = *ifa->ifa_addr; 841 if (ifa->ifa_dstaddr) 842 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 843 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 844 NULL) == 0) 845 continue; 846 } 847 #endif /* INET */ 848 #ifdef INET6 849 if (ifa->ifa_addr->sa_family == AF_INET6) { 850 in6_purgeaddr(ifa); 851 /* ifp_addrhead is already updated */ 852 continue; 853 } 854 #endif /* INET6 */ 855 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 856 ifa_free(ifa); 857 } 858 } 859 860 /* 861 * Remove any multicast network addresses from an interface when an ifnet 862 * is going away. 863 */ 864 static void 865 if_purgemaddrs(struct ifnet *ifp) 866 { 867 struct ifmultiaddr *ifma; 868 struct ifmultiaddr *next; 869 870 IF_ADDR_WLOCK(ifp); 871 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 872 if_delmulti_locked(ifp, ifma, 1); 873 IF_ADDR_WUNLOCK(ifp); 874 } 875 876 /* 877 * Detach an interface, removing it from the list of "active" interfaces. 878 * If vmove flag is set on entry to if_detach_internal(), perform only a 879 * limited subset of cleanup tasks, given that we are moving an ifnet from 880 * one vnet to another, where it must be fully operational. 881 * 882 * XXXRW: There are some significant questions about event ordering, and 883 * how to prevent things from starting to use the interface during detach. 884 */ 885 void 886 if_detach(struct ifnet *ifp) 887 { 888 889 CURVNET_SET_QUIET(ifp->if_vnet); 890 if_detach_internal(ifp, 0); 891 CURVNET_RESTORE(); 892 } 893 894 static void 895 if_detach_internal(struct ifnet *ifp, int vmove) 896 { 897 struct ifaddr *ifa; 898 struct radix_node_head *rnh; 899 int i, j; 900 struct domain *dp; 901 struct ifnet *iter; 902 int found = 0; 903 904 IFNET_WLOCK(); 905 TAILQ_FOREACH(iter, &V_ifnet, if_link) 906 if (iter == ifp) { 907 TAILQ_REMOVE(&V_ifnet, ifp, if_link); 908 found = 1; 909 break; 910 } 911 #ifdef VIMAGE 912 if (found) 913 curvnet->vnet_ifcnt--; 914 #endif 915 IFNET_WUNLOCK(); 916 if (!found) { 917 if (vmove) 918 panic("%s: ifp=%p not on the ifnet tailq %p", 919 __func__, ifp, &V_ifnet); 920 else 921 return; /* XXX this should panic as well? */ 922 } 923 924 /* 925 * Remove/wait for pending events. 926 */ 927 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 928 929 /* 930 * Remove routes and flush queues. 931 */ 932 if_down(ifp); 933 #ifdef ALTQ 934 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 935 altq_disable(&ifp->if_snd); 936 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 937 altq_detach(&ifp->if_snd); 938 #endif 939 940 if_purgeaddrs(ifp); 941 942 #ifdef INET 943 in_ifdetach(ifp); 944 #endif 945 946 #ifdef INET6 947 /* 948 * Remove all IPv6 kernel structs related to ifp. This should be done 949 * before removing routing entries below, since IPv6 interface direct 950 * routes are expected to be removed by the IPv6-specific kernel API. 951 * Otherwise, the kernel will detect some inconsistency and bark it. 952 */ 953 in6_ifdetach(ifp); 954 #endif 955 if_purgemaddrs(ifp); 956 957 /* Announce that the interface is gone. */ 958 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 959 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 960 if (IS_DEFAULT_VNET(curvnet)) 961 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 962 963 if (!vmove) { 964 /* 965 * Prevent further calls into the device driver via ifnet. 966 */ 967 if_dead(ifp); 968 969 /* 970 * Remove link ifaddr pointer and maybe decrement if_index. 971 * Clean up all addresses. 972 */ 973 ifp->if_addr = NULL; 974 975 /* We can now free link ifaddr. */ 976 if (!TAILQ_EMPTY(&ifp->if_addrhead)) { 977 ifa = TAILQ_FIRST(&ifp->if_addrhead); 978 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 979 ifa_free(ifa); 980 } 981 } 982 983 /* 984 * Delete all remaining routes using this interface 985 * Unfortuneatly the only way to do this is to slog through 986 * the entire routing table looking for routes which point 987 * to this interface...oh well... 988 */ 989 for (i = 1; i <= AF_MAX; i++) { 990 for (j = 0; j < rt_numfibs; j++) { 991 rnh = rt_tables_get_rnh(j, i); 992 if (rnh == NULL) 993 continue; 994 RADIX_NODE_HEAD_LOCK(rnh); 995 (void) rnh->rnh_walktree(rnh, if_rtdel, ifp); 996 RADIX_NODE_HEAD_UNLOCK(rnh); 997 } 998 } 999 1000 if_delgroups(ifp); 1001 1002 /* 1003 * We cannot hold the lock over dom_ifdetach calls as they might 1004 * sleep, for example trying to drain a callout, thus open up the 1005 * theoretical race with re-attaching. 1006 */ 1007 IF_AFDATA_LOCK(ifp); 1008 i = ifp->if_afdata_initialized; 1009 ifp->if_afdata_initialized = 0; 1010 IF_AFDATA_UNLOCK(ifp); 1011 for (dp = domains; i > 0 && dp; dp = dp->dom_next) { 1012 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 1013 (*dp->dom_ifdetach)(ifp, 1014 ifp->if_afdata[dp->dom_family]); 1015 } 1016 } 1017 1018 #ifdef VIMAGE 1019 /* 1020 * if_vmove() performs a limited version of if_detach() in current 1021 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg. 1022 * An attempt is made to shrink if_index in current vnet, find an 1023 * unused if_index in target vnet and calls if_grow() if necessary, 1024 * and finally find an unused if_xname for the target vnet. 1025 */ 1026 void 1027 if_vmove(struct ifnet *ifp, struct vnet *new_vnet) 1028 { 1029 u_short idx; 1030 1031 /* 1032 * Detach from current vnet, but preserve LLADDR info, do not 1033 * mark as dead etc. so that the ifnet can be reattached later. 1034 */ 1035 if_detach_internal(ifp, 1); 1036 1037 /* 1038 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink 1039 * the if_index for that vnet if possible. 1040 * 1041 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized, 1042 * or we'd lock on one vnet and unlock on another. 1043 */ 1044 IFNET_WLOCK(); 1045 ifindex_free_locked(ifp->if_index); 1046 IFNET_WUNLOCK(); 1047 1048 /* 1049 * Perform interface-specific reassignment tasks, if provided by 1050 * the driver. 1051 */ 1052 if (ifp->if_reassign != NULL) 1053 ifp->if_reassign(ifp, new_vnet, NULL); 1054 1055 /* 1056 * Switch to the context of the target vnet. 1057 */ 1058 CURVNET_SET_QUIET(new_vnet); 1059 1060 IFNET_WLOCK(); 1061 if (ifindex_alloc_locked(&idx) != 0) { 1062 IFNET_WUNLOCK(); 1063 panic("if_index overflow"); 1064 } 1065 ifp->if_index = idx; 1066 ifnet_setbyindex_locked(ifp->if_index, ifp); 1067 IFNET_WUNLOCK(); 1068 1069 if_attach_internal(ifp, 1); 1070 1071 CURVNET_RESTORE(); 1072 } 1073 1074 /* 1075 * Move an ifnet to or from another child prison/vnet, specified by the jail id. 1076 */ 1077 static int 1078 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid) 1079 { 1080 struct prison *pr; 1081 struct ifnet *difp; 1082 1083 /* Try to find the prison within our visibility. */ 1084 sx_slock(&allprison_lock); 1085 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1086 sx_sunlock(&allprison_lock); 1087 if (pr == NULL) 1088 return (ENXIO); 1089 prison_hold_locked(pr); 1090 mtx_unlock(&pr->pr_mtx); 1091 1092 /* Do not try to move the iface from and to the same prison. */ 1093 if (pr->pr_vnet == ifp->if_vnet) { 1094 prison_free(pr); 1095 return (EEXIST); 1096 } 1097 1098 /* Make sure the named iface does not exists in the dst. prison/vnet. */ 1099 /* XXX Lock interfaces to avoid races. */ 1100 CURVNET_SET_QUIET(pr->pr_vnet); 1101 difp = ifunit(ifname); 1102 CURVNET_RESTORE(); 1103 if (difp != NULL) { 1104 prison_free(pr); 1105 return (EEXIST); 1106 } 1107 1108 /* Move the interface into the child jail/vnet. */ 1109 if_vmove(ifp, pr->pr_vnet); 1110 1111 /* Report the new if_xname back to the userland. */ 1112 sprintf(ifname, "%s", ifp->if_xname); 1113 1114 prison_free(pr); 1115 return (0); 1116 } 1117 1118 static int 1119 if_vmove_reclaim(struct thread *td, char *ifname, int jid) 1120 { 1121 struct prison *pr; 1122 struct vnet *vnet_dst; 1123 struct ifnet *ifp; 1124 1125 /* Try to find the prison within our visibility. */ 1126 sx_slock(&allprison_lock); 1127 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1128 sx_sunlock(&allprison_lock); 1129 if (pr == NULL) 1130 return (ENXIO); 1131 prison_hold_locked(pr); 1132 mtx_unlock(&pr->pr_mtx); 1133 1134 /* Make sure the named iface exists in the source prison/vnet. */ 1135 CURVNET_SET(pr->pr_vnet); 1136 ifp = ifunit(ifname); /* XXX Lock to avoid races. */ 1137 if (ifp == NULL) { 1138 CURVNET_RESTORE(); 1139 prison_free(pr); 1140 return (ENXIO); 1141 } 1142 1143 /* Do not try to move the iface from and to the same prison. */ 1144 vnet_dst = TD_TO_VNET(td); 1145 if (vnet_dst == ifp->if_vnet) { 1146 CURVNET_RESTORE(); 1147 prison_free(pr); 1148 return (EEXIST); 1149 } 1150 1151 /* Get interface back from child jail/vnet. */ 1152 if_vmove(ifp, vnet_dst); 1153 CURVNET_RESTORE(); 1154 1155 /* Report the new if_xname back to the userland. */ 1156 sprintf(ifname, "%s", ifp->if_xname); 1157 1158 prison_free(pr); 1159 return (0); 1160 } 1161 #endif /* VIMAGE */ 1162 1163 /* 1164 * Add a group to an interface 1165 */ 1166 int 1167 if_addgroup(struct ifnet *ifp, const char *groupname) 1168 { 1169 struct ifg_list *ifgl; 1170 struct ifg_group *ifg = NULL; 1171 struct ifg_member *ifgm; 1172 int new = 0; 1173 1174 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 1175 groupname[strlen(groupname) - 1] <= '9') 1176 return (EINVAL); 1177 1178 IFNET_WLOCK(); 1179 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1180 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) { 1181 IFNET_WUNLOCK(); 1182 return (EEXIST); 1183 } 1184 1185 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP, 1186 M_NOWAIT)) == NULL) { 1187 IFNET_WUNLOCK(); 1188 return (ENOMEM); 1189 } 1190 1191 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member), 1192 M_TEMP, M_NOWAIT)) == NULL) { 1193 free(ifgl, M_TEMP); 1194 IFNET_WUNLOCK(); 1195 return (ENOMEM); 1196 } 1197 1198 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1199 if (!strcmp(ifg->ifg_group, groupname)) 1200 break; 1201 1202 if (ifg == NULL) { 1203 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group), 1204 M_TEMP, M_NOWAIT)) == NULL) { 1205 free(ifgl, M_TEMP); 1206 free(ifgm, M_TEMP); 1207 IFNET_WUNLOCK(); 1208 return (ENOMEM); 1209 } 1210 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 1211 ifg->ifg_refcnt = 0; 1212 TAILQ_INIT(&ifg->ifg_members); 1213 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next); 1214 new = 1; 1215 } 1216 1217 ifg->ifg_refcnt++; 1218 ifgl->ifgl_group = ifg; 1219 ifgm->ifgm_ifp = ifp; 1220 1221 IF_ADDR_WLOCK(ifp); 1222 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 1223 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 1224 IF_ADDR_WUNLOCK(ifp); 1225 1226 IFNET_WUNLOCK(); 1227 1228 if (new) 1229 EVENTHANDLER_INVOKE(group_attach_event, ifg); 1230 EVENTHANDLER_INVOKE(group_change_event, groupname); 1231 1232 return (0); 1233 } 1234 1235 /* 1236 * Remove a group from an interface 1237 */ 1238 int 1239 if_delgroup(struct ifnet *ifp, const char *groupname) 1240 { 1241 struct ifg_list *ifgl; 1242 struct ifg_member *ifgm; 1243 1244 IFNET_WLOCK(); 1245 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1246 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1247 break; 1248 if (ifgl == NULL) { 1249 IFNET_WUNLOCK(); 1250 return (ENOENT); 1251 } 1252 1253 IF_ADDR_WLOCK(ifp); 1254 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1255 IF_ADDR_WUNLOCK(ifp); 1256 1257 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1258 if (ifgm->ifgm_ifp == ifp) 1259 break; 1260 1261 if (ifgm != NULL) { 1262 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 1263 free(ifgm, M_TEMP); 1264 } 1265 1266 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1267 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1268 IFNET_WUNLOCK(); 1269 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group); 1270 free(ifgl->ifgl_group, M_TEMP); 1271 } else 1272 IFNET_WUNLOCK(); 1273 1274 free(ifgl, M_TEMP); 1275 1276 EVENTHANDLER_INVOKE(group_change_event, groupname); 1277 1278 return (0); 1279 } 1280 1281 /* 1282 * Remove an interface from all groups 1283 */ 1284 static void 1285 if_delgroups(struct ifnet *ifp) 1286 { 1287 struct ifg_list *ifgl; 1288 struct ifg_member *ifgm; 1289 char groupname[IFNAMSIZ]; 1290 1291 IFNET_WLOCK(); 1292 while (!TAILQ_EMPTY(&ifp->if_groups)) { 1293 ifgl = TAILQ_FIRST(&ifp->if_groups); 1294 1295 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ); 1296 1297 IF_ADDR_WLOCK(ifp); 1298 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1299 IF_ADDR_WUNLOCK(ifp); 1300 1301 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1302 if (ifgm->ifgm_ifp == ifp) 1303 break; 1304 1305 if (ifgm != NULL) { 1306 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, 1307 ifgm_next); 1308 free(ifgm, M_TEMP); 1309 } 1310 1311 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1312 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1313 IFNET_WUNLOCK(); 1314 EVENTHANDLER_INVOKE(group_detach_event, 1315 ifgl->ifgl_group); 1316 free(ifgl->ifgl_group, M_TEMP); 1317 } else 1318 IFNET_WUNLOCK(); 1319 1320 free(ifgl, M_TEMP); 1321 1322 EVENTHANDLER_INVOKE(group_change_event, groupname); 1323 1324 IFNET_WLOCK(); 1325 } 1326 IFNET_WUNLOCK(); 1327 } 1328 1329 /* 1330 * Stores all groups from an interface in memory pointed 1331 * to by data 1332 */ 1333 static int 1334 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp) 1335 { 1336 int len, error; 1337 struct ifg_list *ifgl; 1338 struct ifg_req ifgrq, *ifgp; 1339 struct ifgroupreq *ifgr = data; 1340 1341 if (ifgr->ifgr_len == 0) { 1342 IF_ADDR_RLOCK(ifp); 1343 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1344 ifgr->ifgr_len += sizeof(struct ifg_req); 1345 IF_ADDR_RUNLOCK(ifp); 1346 return (0); 1347 } 1348 1349 len = ifgr->ifgr_len; 1350 ifgp = ifgr->ifgr_groups; 1351 /* XXX: wire */ 1352 IF_ADDR_RLOCK(ifp); 1353 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 1354 if (len < sizeof(ifgrq)) { 1355 IF_ADDR_RUNLOCK(ifp); 1356 return (EINVAL); 1357 } 1358 bzero(&ifgrq, sizeof ifgrq); 1359 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 1360 sizeof(ifgrq.ifgrq_group)); 1361 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1362 IF_ADDR_RUNLOCK(ifp); 1363 return (error); 1364 } 1365 len -= sizeof(ifgrq); 1366 ifgp++; 1367 } 1368 IF_ADDR_RUNLOCK(ifp); 1369 1370 return (0); 1371 } 1372 1373 /* 1374 * Stores all members of a group in memory pointed to by data 1375 */ 1376 static int 1377 if_getgroupmembers(struct ifgroupreq *data) 1378 { 1379 struct ifgroupreq *ifgr = data; 1380 struct ifg_group *ifg; 1381 struct ifg_member *ifgm; 1382 struct ifg_req ifgrq, *ifgp; 1383 int len, error; 1384 1385 IFNET_RLOCK(); 1386 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1387 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 1388 break; 1389 if (ifg == NULL) { 1390 IFNET_RUNLOCK(); 1391 return (ENOENT); 1392 } 1393 1394 if (ifgr->ifgr_len == 0) { 1395 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1396 ifgr->ifgr_len += sizeof(ifgrq); 1397 IFNET_RUNLOCK(); 1398 return (0); 1399 } 1400 1401 len = ifgr->ifgr_len; 1402 ifgp = ifgr->ifgr_groups; 1403 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1404 if (len < sizeof(ifgrq)) { 1405 IFNET_RUNLOCK(); 1406 return (EINVAL); 1407 } 1408 bzero(&ifgrq, sizeof ifgrq); 1409 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1410 sizeof(ifgrq.ifgrq_member)); 1411 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1412 IFNET_RUNLOCK(); 1413 return (error); 1414 } 1415 len -= sizeof(ifgrq); 1416 ifgp++; 1417 } 1418 IFNET_RUNLOCK(); 1419 1420 return (0); 1421 } 1422 1423 /* 1424 * Delete Routes for a Network Interface 1425 * 1426 * Called for each routing entry via the rnh->rnh_walktree() call above 1427 * to delete all route entries referencing a detaching network interface. 1428 * 1429 * Arguments: 1430 * rn pointer to node in the routing table 1431 * arg argument passed to rnh->rnh_walktree() - detaching interface 1432 * 1433 * Returns: 1434 * 0 successful 1435 * errno failed - reason indicated 1436 * 1437 */ 1438 static int 1439 if_rtdel(struct radix_node *rn, void *arg) 1440 { 1441 struct rtentry *rt = (struct rtentry *)rn; 1442 struct ifnet *ifp = arg; 1443 int err; 1444 1445 if (rt->rt_ifp == ifp) { 1446 1447 /* 1448 * Protect (sorta) against walktree recursion problems 1449 * with cloned routes 1450 */ 1451 if ((rt->rt_flags & RTF_UP) == 0) 1452 return (0); 1453 1454 err = rtrequest_fib(RTM_DELETE, rt_key(rt), rt->rt_gateway, 1455 rt_mask(rt), 1456 rt->rt_flags|RTF_RNH_LOCKED|RTF_PINNED, 1457 (struct rtentry **) NULL, rt->rt_fibnum); 1458 if (err) { 1459 log(LOG_WARNING, "if_rtdel: error %d\n", err); 1460 } 1461 } 1462 1463 return (0); 1464 } 1465 1466 /* 1467 * Return counter values from counter(9)s stored in ifnet. 1468 */ 1469 uint64_t 1470 if_get_counter_default(struct ifnet *ifp, ift_counter cnt) 1471 { 1472 1473 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1474 1475 return (counter_u64_fetch(ifp->if_counters[cnt])); 1476 } 1477 1478 /* 1479 * Increase an ifnet counter. Usually used for counters shared 1480 * between the stack and a driver, but function supports them all. 1481 */ 1482 void 1483 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc) 1484 { 1485 1486 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1487 1488 counter_u64_add(ifp->if_counters[cnt], inc); 1489 } 1490 1491 /* 1492 * Copy data from ifnet to userland API structure if_data. 1493 */ 1494 void 1495 if_data_copy(struct ifnet *ifp, struct if_data *ifd) 1496 { 1497 1498 ifd->ifi_type = ifp->if_type; 1499 ifd->ifi_physical = 0; 1500 ifd->ifi_addrlen = ifp->if_addrlen; 1501 ifd->ifi_hdrlen = ifp->if_hdrlen; 1502 ifd->ifi_link_state = ifp->if_link_state; 1503 ifd->ifi_vhid = 0; 1504 ifd->ifi_datalen = sizeof(struct if_data); 1505 ifd->ifi_mtu = ifp->if_mtu; 1506 ifd->ifi_metric = ifp->if_metric; 1507 ifd->ifi_baudrate = ifp->if_baudrate; 1508 ifd->ifi_hwassist = ifp->if_hwassist; 1509 ifd->ifi_epoch = ifp->if_epoch; 1510 ifd->ifi_lastchange = ifp->if_lastchange; 1511 1512 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS); 1513 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS); 1514 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS); 1515 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS); 1516 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS); 1517 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES); 1518 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES); 1519 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS); 1520 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS); 1521 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS); 1522 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS); 1523 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO); 1524 } 1525 1526 /* 1527 * Wrapper functions for struct ifnet address list locking macros. These are 1528 * used by kernel modules to avoid encoding programming interface or binary 1529 * interface assumptions that may be violated when kernel-internal locking 1530 * approaches change. 1531 */ 1532 void 1533 if_addr_rlock(struct ifnet *ifp) 1534 { 1535 1536 IF_ADDR_RLOCK(ifp); 1537 } 1538 1539 void 1540 if_addr_runlock(struct ifnet *ifp) 1541 { 1542 1543 IF_ADDR_RUNLOCK(ifp); 1544 } 1545 1546 void 1547 if_maddr_rlock(if_t ifp) 1548 { 1549 1550 IF_ADDR_RLOCK((struct ifnet *)ifp); 1551 } 1552 1553 void 1554 if_maddr_runlock(if_t ifp) 1555 { 1556 1557 IF_ADDR_RUNLOCK((struct ifnet *)ifp); 1558 } 1559 1560 /* 1561 * Initialization, destruction and refcounting functions for ifaddrs. 1562 */ 1563 struct ifaddr * 1564 ifa_alloc(size_t size, int flags) 1565 { 1566 struct ifaddr *ifa; 1567 1568 KASSERT(size >= sizeof(struct ifaddr), 1569 ("%s: invalid size %zu", __func__, size)); 1570 1571 ifa = malloc(size, M_IFADDR, M_ZERO | flags); 1572 if (ifa == NULL) 1573 return (NULL); 1574 1575 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL) 1576 goto fail; 1577 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL) 1578 goto fail; 1579 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL) 1580 goto fail; 1581 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL) 1582 goto fail; 1583 1584 refcount_init(&ifa->ifa_refcnt, 1); 1585 1586 return (ifa); 1587 1588 fail: 1589 /* free(NULL) is okay */ 1590 counter_u64_free(ifa->ifa_opackets); 1591 counter_u64_free(ifa->ifa_ipackets); 1592 counter_u64_free(ifa->ifa_obytes); 1593 counter_u64_free(ifa->ifa_ibytes); 1594 free(ifa, M_IFADDR); 1595 1596 return (NULL); 1597 } 1598 1599 void 1600 ifa_ref(struct ifaddr *ifa) 1601 { 1602 1603 refcount_acquire(&ifa->ifa_refcnt); 1604 } 1605 1606 void 1607 ifa_free(struct ifaddr *ifa) 1608 { 1609 1610 if (refcount_release(&ifa->ifa_refcnt)) { 1611 counter_u64_free(ifa->ifa_opackets); 1612 counter_u64_free(ifa->ifa_ipackets); 1613 counter_u64_free(ifa->ifa_obytes); 1614 counter_u64_free(ifa->ifa_ibytes); 1615 free(ifa, M_IFADDR); 1616 } 1617 } 1618 1619 int 1620 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1621 { 1622 int error = 0; 1623 struct rtentry *rt = NULL; 1624 struct rt_addrinfo info; 1625 static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK}; 1626 1627 bzero(&info, sizeof(info)); 1628 info.rti_ifp = V_loif; 1629 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; 1630 info.rti_info[RTAX_DST] = ia; 1631 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1632 error = rtrequest1_fib(RTM_ADD, &info, &rt, ifa->ifa_ifp->if_fib); 1633 1634 if (error == 0 && rt != NULL) { 1635 RT_LOCK(rt); 1636 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type = 1637 ifa->ifa_ifp->if_type; 1638 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index = 1639 ifa->ifa_ifp->if_index; 1640 RT_REMREF(rt); 1641 RT_UNLOCK(rt); 1642 } else if (error != 0) 1643 log(LOG_DEBUG, "%s: insertion failed: %u\n", __func__, error); 1644 1645 return (error); 1646 } 1647 1648 int 1649 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1650 { 1651 int error = 0; 1652 struct rt_addrinfo info; 1653 struct sockaddr_dl null_sdl; 1654 1655 bzero(&null_sdl, sizeof(null_sdl)); 1656 null_sdl.sdl_len = sizeof(null_sdl); 1657 null_sdl.sdl_family = AF_LINK; 1658 null_sdl.sdl_type = ifa->ifa_ifp->if_type; 1659 null_sdl.sdl_index = ifa->ifa_ifp->if_index; 1660 bzero(&info, sizeof(info)); 1661 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; 1662 info.rti_info[RTAX_DST] = ia; 1663 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1664 error = rtrequest1_fib(RTM_DELETE, &info, NULL, ifa->ifa_ifp->if_fib); 1665 1666 if (error != 0) 1667 log(LOG_DEBUG, "%s: deletion failed: %u\n", __func__, error); 1668 1669 return (error); 1670 } 1671 1672 int 1673 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *sa, int fib) 1674 { 1675 struct rtentry *rt; 1676 1677 rt = rtalloc1_fib(sa, 0, 0, fib); 1678 if (rt == NULL) { 1679 log(LOG_DEBUG, "%s: fail", __func__); 1680 return (EHOSTUNREACH); 1681 } 1682 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type = 1683 ifa->ifa_ifp->if_type; 1684 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index = 1685 ifa->ifa_ifp->if_index; 1686 RTFREE_LOCKED(rt); 1687 1688 return (0); 1689 } 1690 1691 /* 1692 * XXX: Because sockaddr_dl has deeper structure than the sockaddr 1693 * structs used to represent other address families, it is necessary 1694 * to perform a different comparison. 1695 */ 1696 1697 #define sa_dl_equal(a1, a2) \ 1698 ((((struct sockaddr_dl *)(a1))->sdl_len == \ 1699 ((struct sockaddr_dl *)(a2))->sdl_len) && \ 1700 (bcmp(LLADDR((struct sockaddr_dl *)(a1)), \ 1701 LLADDR((struct sockaddr_dl *)(a2)), \ 1702 ((struct sockaddr_dl *)(a1))->sdl_alen) == 0)) 1703 1704 /* 1705 * Locate an interface based on a complete address. 1706 */ 1707 /*ARGSUSED*/ 1708 static struct ifaddr * 1709 ifa_ifwithaddr_internal(struct sockaddr *addr, int getref) 1710 { 1711 struct ifnet *ifp; 1712 struct ifaddr *ifa; 1713 1714 IFNET_RLOCK_NOSLEEP(); 1715 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1716 IF_ADDR_RLOCK(ifp); 1717 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1718 if (ifa->ifa_addr->sa_family != addr->sa_family) 1719 continue; 1720 if (sa_equal(addr, ifa->ifa_addr)) { 1721 if (getref) 1722 ifa_ref(ifa); 1723 IF_ADDR_RUNLOCK(ifp); 1724 goto done; 1725 } 1726 /* IP6 doesn't have broadcast */ 1727 if ((ifp->if_flags & IFF_BROADCAST) && 1728 ifa->ifa_broadaddr && 1729 ifa->ifa_broadaddr->sa_len != 0 && 1730 sa_equal(ifa->ifa_broadaddr, addr)) { 1731 if (getref) 1732 ifa_ref(ifa); 1733 IF_ADDR_RUNLOCK(ifp); 1734 goto done; 1735 } 1736 } 1737 IF_ADDR_RUNLOCK(ifp); 1738 } 1739 ifa = NULL; 1740 done: 1741 IFNET_RUNLOCK_NOSLEEP(); 1742 return (ifa); 1743 } 1744 1745 struct ifaddr * 1746 ifa_ifwithaddr(struct sockaddr *addr) 1747 { 1748 1749 return (ifa_ifwithaddr_internal(addr, 1)); 1750 } 1751 1752 int 1753 ifa_ifwithaddr_check(struct sockaddr *addr) 1754 { 1755 1756 return (ifa_ifwithaddr_internal(addr, 0) != NULL); 1757 } 1758 1759 /* 1760 * Locate an interface based on the broadcast address. 1761 */ 1762 /* ARGSUSED */ 1763 struct ifaddr * 1764 ifa_ifwithbroadaddr(struct sockaddr *addr, int fibnum) 1765 { 1766 struct ifnet *ifp; 1767 struct ifaddr *ifa; 1768 1769 IFNET_RLOCK_NOSLEEP(); 1770 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 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 ((ifp->if_flags & IFF_BROADCAST) && 1778 ifa->ifa_broadaddr && 1779 ifa->ifa_broadaddr->sa_len != 0 && 1780 sa_equal(ifa->ifa_broadaddr, addr)) { 1781 ifa_ref(ifa); 1782 IF_ADDR_RUNLOCK(ifp); 1783 goto done; 1784 } 1785 } 1786 IF_ADDR_RUNLOCK(ifp); 1787 } 1788 ifa = NULL; 1789 done: 1790 IFNET_RUNLOCK_NOSLEEP(); 1791 return (ifa); 1792 } 1793 1794 /* 1795 * Locate the point to point interface with a given destination address. 1796 */ 1797 /*ARGSUSED*/ 1798 struct ifaddr * 1799 ifa_ifwithdstaddr(struct sockaddr *addr, int fibnum) 1800 { 1801 struct ifnet *ifp; 1802 struct ifaddr *ifa; 1803 1804 IFNET_RLOCK_NOSLEEP(); 1805 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1806 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1807 continue; 1808 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1809 continue; 1810 IF_ADDR_RLOCK(ifp); 1811 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1812 if (ifa->ifa_addr->sa_family != addr->sa_family) 1813 continue; 1814 if (ifa->ifa_dstaddr != NULL && 1815 sa_equal(addr, ifa->ifa_dstaddr)) { 1816 ifa_ref(ifa); 1817 IF_ADDR_RUNLOCK(ifp); 1818 goto done; 1819 } 1820 } 1821 IF_ADDR_RUNLOCK(ifp); 1822 } 1823 ifa = NULL; 1824 done: 1825 IFNET_RUNLOCK_NOSLEEP(); 1826 return (ifa); 1827 } 1828 1829 /* 1830 * Find an interface on a specific network. If many, choice 1831 * is most specific found. 1832 */ 1833 struct ifaddr * 1834 ifa_ifwithnet(struct sockaddr *addr, int ignore_ptp, int fibnum) 1835 { 1836 struct ifnet *ifp; 1837 struct ifaddr *ifa; 1838 struct ifaddr *ifa_maybe = NULL; 1839 u_int af = addr->sa_family; 1840 char *addr_data = addr->sa_data, *cplim; 1841 1842 /* 1843 * AF_LINK addresses can be looked up directly by their index number, 1844 * so do that if we can. 1845 */ 1846 if (af == AF_LINK) { 1847 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; 1848 if (sdl->sdl_index && sdl->sdl_index <= V_if_index) 1849 return (ifaddr_byindex(sdl->sdl_index)); 1850 } 1851 1852 /* 1853 * Scan though each interface, looking for ones that have addresses 1854 * in this address family and the requested fib. Maintain a reference 1855 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that 1856 * kept it stable when we move onto the next interface. 1857 */ 1858 IFNET_RLOCK_NOSLEEP(); 1859 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1860 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1861 continue; 1862 IF_ADDR_RLOCK(ifp); 1863 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1864 char *cp, *cp2, *cp3; 1865 1866 if (ifa->ifa_addr->sa_family != af) 1867 next: continue; 1868 if (af == AF_INET && 1869 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) { 1870 /* 1871 * This is a bit broken as it doesn't 1872 * take into account that the remote end may 1873 * be a single node in the network we are 1874 * looking for. 1875 * The trouble is that we don't know the 1876 * netmask for the remote end. 1877 */ 1878 if (ifa->ifa_dstaddr != NULL && 1879 sa_equal(addr, ifa->ifa_dstaddr)) { 1880 ifa_ref(ifa); 1881 IF_ADDR_RUNLOCK(ifp); 1882 goto done; 1883 } 1884 } else { 1885 /* 1886 * Scan all the bits in the ifa's address. 1887 * If a bit dissagrees with what we are 1888 * looking for, mask it with the netmask 1889 * to see if it really matters. 1890 * (A byte at a time) 1891 */ 1892 if (ifa->ifa_netmask == 0) 1893 continue; 1894 cp = addr_data; 1895 cp2 = ifa->ifa_addr->sa_data; 1896 cp3 = ifa->ifa_netmask->sa_data; 1897 cplim = ifa->ifa_netmask->sa_len 1898 + (char *)ifa->ifa_netmask; 1899 while (cp3 < cplim) 1900 if ((*cp++ ^ *cp2++) & *cp3++) 1901 goto next; /* next address! */ 1902 /* 1903 * If the netmask of what we just found 1904 * is more specific than what we had before 1905 * (if we had one), or if the virtual status 1906 * of new prefix is better than of the old one, 1907 * then remember the new one before continuing 1908 * to search for an even better one. 1909 */ 1910 if (ifa_maybe == NULL || 1911 ifa_preferred(ifa_maybe, ifa) || 1912 rn_refines((caddr_t)ifa->ifa_netmask, 1913 (caddr_t)ifa_maybe->ifa_netmask)) { 1914 if (ifa_maybe != NULL) 1915 ifa_free(ifa_maybe); 1916 ifa_maybe = ifa; 1917 ifa_ref(ifa_maybe); 1918 } 1919 } 1920 } 1921 IF_ADDR_RUNLOCK(ifp); 1922 } 1923 ifa = ifa_maybe; 1924 ifa_maybe = NULL; 1925 done: 1926 IFNET_RUNLOCK_NOSLEEP(); 1927 if (ifa_maybe != NULL) 1928 ifa_free(ifa_maybe); 1929 return (ifa); 1930 } 1931 1932 /* 1933 * Find an interface address specific to an interface best matching 1934 * a given address. 1935 */ 1936 struct ifaddr * 1937 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp) 1938 { 1939 struct ifaddr *ifa; 1940 char *cp, *cp2, *cp3; 1941 char *cplim; 1942 struct ifaddr *ifa_maybe = NULL; 1943 u_int af = addr->sa_family; 1944 1945 if (af >= AF_MAX) 1946 return (NULL); 1947 IF_ADDR_RLOCK(ifp); 1948 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1949 if (ifa->ifa_addr->sa_family != af) 1950 continue; 1951 if (ifa_maybe == NULL) 1952 ifa_maybe = ifa; 1953 if (ifa->ifa_netmask == 0) { 1954 if (sa_equal(addr, ifa->ifa_addr) || 1955 (ifa->ifa_dstaddr && 1956 sa_equal(addr, ifa->ifa_dstaddr))) 1957 goto done; 1958 continue; 1959 } 1960 if (ifp->if_flags & IFF_POINTOPOINT) { 1961 if (sa_equal(addr, ifa->ifa_dstaddr)) 1962 goto done; 1963 } else { 1964 cp = addr->sa_data; 1965 cp2 = ifa->ifa_addr->sa_data; 1966 cp3 = ifa->ifa_netmask->sa_data; 1967 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1968 for (; cp3 < cplim; cp3++) 1969 if ((*cp++ ^ *cp2++) & *cp3) 1970 break; 1971 if (cp3 == cplim) 1972 goto done; 1973 } 1974 } 1975 ifa = ifa_maybe; 1976 done: 1977 if (ifa != NULL) 1978 ifa_ref(ifa); 1979 IF_ADDR_RUNLOCK(ifp); 1980 return (ifa); 1981 } 1982 1983 /* 1984 * See whether new ifa is better than current one: 1985 * 1) A non-virtual one is preferred over virtual. 1986 * 2) A virtual in master state preferred over any other state. 1987 * 1988 * Used in several address selecting functions. 1989 */ 1990 int 1991 ifa_preferred(struct ifaddr *cur, struct ifaddr *next) 1992 { 1993 1994 return (cur->ifa_carp && (!next->ifa_carp || 1995 ((*carp_master_p)(next) && !(*carp_master_p)(cur)))); 1996 } 1997 1998 #include <net/if_llatbl.h> 1999 2000 /* 2001 * Default action when installing a route with a Link Level gateway. 2002 * Lookup an appropriate real ifa to point to. 2003 * This should be moved to /sys/net/link.c eventually. 2004 */ 2005 static void 2006 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 2007 { 2008 struct ifaddr *ifa, *oifa; 2009 struct sockaddr *dst; 2010 struct ifnet *ifp; 2011 2012 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) || 2013 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0)) 2014 return; 2015 ifa = ifaof_ifpforaddr(dst, ifp); 2016 if (ifa) { 2017 oifa = rt->rt_ifa; 2018 rt->rt_ifa = ifa; 2019 ifa_free(oifa); 2020 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 2021 ifa->ifa_rtrequest(cmd, rt, info); 2022 } 2023 } 2024 2025 struct sockaddr_dl * 2026 link_alloc_sdl(size_t size, int flags) 2027 { 2028 2029 return (malloc(size, M_TEMP, flags)); 2030 } 2031 2032 void 2033 link_free_sdl(struct sockaddr *sa) 2034 { 2035 free(sa, M_TEMP); 2036 } 2037 2038 /* 2039 * Fills in given sdl with interface basic info. 2040 * Returns pointer to filled sdl. 2041 */ 2042 struct sockaddr_dl * 2043 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype) 2044 { 2045 struct sockaddr_dl *sdl; 2046 2047 sdl = (struct sockaddr_dl *)paddr; 2048 memset(sdl, 0, sizeof(struct sockaddr_dl)); 2049 sdl->sdl_len = sizeof(struct sockaddr_dl); 2050 sdl->sdl_family = AF_LINK; 2051 sdl->sdl_index = ifp->if_index; 2052 sdl->sdl_type = iftype; 2053 2054 return (sdl); 2055 } 2056 2057 /* 2058 * Mark an interface down and notify protocols of 2059 * the transition. 2060 */ 2061 static void 2062 if_unroute(struct ifnet *ifp, int flag, int fam) 2063 { 2064 struct ifaddr *ifa; 2065 2066 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP")); 2067 2068 ifp->if_flags &= ~flag; 2069 getmicrotime(&ifp->if_lastchange); 2070 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2071 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2072 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 2073 ifp->if_qflush(ifp); 2074 2075 if (ifp->if_carp) 2076 (*carp_linkstate_p)(ifp); 2077 rt_ifmsg(ifp); 2078 } 2079 2080 /* 2081 * Mark an interface up and notify protocols of 2082 * the transition. 2083 */ 2084 static void 2085 if_route(struct ifnet *ifp, int flag, int fam) 2086 { 2087 struct ifaddr *ifa; 2088 2089 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP")); 2090 2091 ifp->if_flags |= flag; 2092 getmicrotime(&ifp->if_lastchange); 2093 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2094 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2095 pfctlinput(PRC_IFUP, ifa->ifa_addr); 2096 if (ifp->if_carp) 2097 (*carp_linkstate_p)(ifp); 2098 rt_ifmsg(ifp); 2099 #ifdef INET6 2100 in6_if_up(ifp); 2101 #endif 2102 } 2103 2104 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */ 2105 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */ 2106 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *); 2107 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t); 2108 int (*vlan_tag_p)(struct ifnet *, uint16_t *); 2109 int (*vlan_setcookie_p)(struct ifnet *, void *); 2110 void *(*vlan_cookie_p)(struct ifnet *); 2111 2112 /* 2113 * Handle a change in the interface link state. To avoid LORs 2114 * between driver lock and upper layer locks, as well as possible 2115 * recursions, we post event to taskqueue, and all job 2116 * is done in static do_link_state_change(). 2117 */ 2118 void 2119 if_link_state_change(struct ifnet *ifp, int link_state) 2120 { 2121 /* Return if state hasn't changed. */ 2122 if (ifp->if_link_state == link_state) 2123 return; 2124 2125 ifp->if_link_state = link_state; 2126 2127 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask); 2128 } 2129 2130 static void 2131 do_link_state_change(void *arg, int pending) 2132 { 2133 struct ifnet *ifp = (struct ifnet *)arg; 2134 int link_state = ifp->if_link_state; 2135 CURVNET_SET(ifp->if_vnet); 2136 2137 /* Notify that the link state has changed. */ 2138 rt_ifmsg(ifp); 2139 if (ifp->if_vlantrunk != NULL) 2140 (*vlan_link_state_p)(ifp); 2141 2142 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) && 2143 IFP2AC(ifp)->ac_netgraph != NULL) 2144 (*ng_ether_link_state_p)(ifp, link_state); 2145 if (ifp->if_carp) 2146 (*carp_linkstate_p)(ifp); 2147 if (ifp->if_bridge) 2148 (*bridge_linkstate_p)(ifp); 2149 if (ifp->if_lagg) 2150 (*lagg_linkstate_p)(ifp, link_state); 2151 2152 if (IS_DEFAULT_VNET(curvnet)) 2153 devctl_notify("IFNET", ifp->if_xname, 2154 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", 2155 NULL); 2156 if (pending > 1) 2157 if_printf(ifp, "%d link states coalesced\n", pending); 2158 if (log_link_state_change) 2159 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname, 2160 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" ); 2161 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, ifp->if_link_state); 2162 CURVNET_RESTORE(); 2163 } 2164 2165 /* 2166 * Mark an interface down and notify protocols of 2167 * the transition. 2168 */ 2169 void 2170 if_down(struct ifnet *ifp) 2171 { 2172 2173 if_unroute(ifp, IFF_UP, AF_UNSPEC); 2174 } 2175 2176 /* 2177 * Mark an interface up and notify protocols of 2178 * the transition. 2179 */ 2180 void 2181 if_up(struct ifnet *ifp) 2182 { 2183 2184 if_route(ifp, IFF_UP, AF_UNSPEC); 2185 } 2186 2187 /* 2188 * Flush an interface queue. 2189 */ 2190 void 2191 if_qflush(struct ifnet *ifp) 2192 { 2193 struct mbuf *m, *n; 2194 struct ifaltq *ifq; 2195 2196 ifq = &ifp->if_snd; 2197 IFQ_LOCK(ifq); 2198 #ifdef ALTQ 2199 if (ALTQ_IS_ENABLED(ifq)) 2200 ALTQ_PURGE(ifq); 2201 #endif 2202 n = ifq->ifq_head; 2203 while ((m = n) != 0) { 2204 n = m->m_nextpkt; 2205 m_freem(m); 2206 } 2207 ifq->ifq_head = 0; 2208 ifq->ifq_tail = 0; 2209 ifq->ifq_len = 0; 2210 IFQ_UNLOCK(ifq); 2211 } 2212 2213 /* 2214 * Map interface name to interface structure pointer, with or without 2215 * returning a reference. 2216 */ 2217 struct ifnet * 2218 ifunit_ref(const char *name) 2219 { 2220 struct ifnet *ifp; 2221 2222 IFNET_RLOCK_NOSLEEP(); 2223 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2224 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 && 2225 !(ifp->if_flags & IFF_DYING)) 2226 break; 2227 } 2228 if (ifp != NULL) 2229 if_ref(ifp); 2230 IFNET_RUNLOCK_NOSLEEP(); 2231 return (ifp); 2232 } 2233 2234 struct ifnet * 2235 ifunit(const char *name) 2236 { 2237 struct ifnet *ifp; 2238 2239 IFNET_RLOCK_NOSLEEP(); 2240 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2241 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0) 2242 break; 2243 } 2244 IFNET_RUNLOCK_NOSLEEP(); 2245 return (ifp); 2246 } 2247 2248 /* 2249 * Hardware specific interface ioctls. 2250 */ 2251 static int 2252 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td) 2253 { 2254 struct ifreq *ifr; 2255 int error = 0; 2256 int new_flags, temp_flags; 2257 size_t namelen, onamelen; 2258 size_t descrlen; 2259 char *descrbuf, *odescrbuf; 2260 char new_name[IFNAMSIZ]; 2261 struct ifaddr *ifa; 2262 struct sockaddr_dl *sdl; 2263 2264 ifr = (struct ifreq *)data; 2265 switch (cmd) { 2266 case SIOCGIFINDEX: 2267 ifr->ifr_index = ifp->if_index; 2268 break; 2269 2270 case SIOCGIFFLAGS: 2271 temp_flags = ifp->if_flags | ifp->if_drv_flags; 2272 ifr->ifr_flags = temp_flags & 0xffff; 2273 ifr->ifr_flagshigh = temp_flags >> 16; 2274 break; 2275 2276 case SIOCGIFCAP: 2277 ifr->ifr_reqcap = ifp->if_capabilities; 2278 ifr->ifr_curcap = ifp->if_capenable; 2279 break; 2280 2281 #ifdef MAC 2282 case SIOCGIFMAC: 2283 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp); 2284 break; 2285 #endif 2286 2287 case SIOCGIFMETRIC: 2288 ifr->ifr_metric = ifp->if_metric; 2289 break; 2290 2291 case SIOCGIFMTU: 2292 ifr->ifr_mtu = ifp->if_mtu; 2293 break; 2294 2295 case SIOCGIFPHYS: 2296 /* XXXGL: did this ever worked? */ 2297 ifr->ifr_phys = 0; 2298 break; 2299 2300 case SIOCGIFDESCR: 2301 error = 0; 2302 sx_slock(&ifdescr_sx); 2303 if (ifp->if_description == NULL) 2304 error = ENOMSG; 2305 else { 2306 /* space for terminating nul */ 2307 descrlen = strlen(ifp->if_description) + 1; 2308 if (ifr->ifr_buffer.length < descrlen) 2309 ifr->ifr_buffer.buffer = NULL; 2310 else 2311 error = copyout(ifp->if_description, 2312 ifr->ifr_buffer.buffer, descrlen); 2313 ifr->ifr_buffer.length = descrlen; 2314 } 2315 sx_sunlock(&ifdescr_sx); 2316 break; 2317 2318 case SIOCSIFDESCR: 2319 error = priv_check(td, PRIV_NET_SETIFDESCR); 2320 if (error) 2321 return (error); 2322 2323 /* 2324 * Copy only (length-1) bytes to make sure that 2325 * if_description is always nul terminated. The 2326 * length parameter is supposed to count the 2327 * terminating nul in. 2328 */ 2329 if (ifr->ifr_buffer.length > ifdescr_maxlen) 2330 return (ENAMETOOLONG); 2331 else if (ifr->ifr_buffer.length == 0) 2332 descrbuf = NULL; 2333 else { 2334 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR, 2335 M_WAITOK | M_ZERO); 2336 error = copyin(ifr->ifr_buffer.buffer, descrbuf, 2337 ifr->ifr_buffer.length - 1); 2338 if (error) { 2339 free(descrbuf, M_IFDESCR); 2340 break; 2341 } 2342 } 2343 2344 sx_xlock(&ifdescr_sx); 2345 odescrbuf = ifp->if_description; 2346 ifp->if_description = descrbuf; 2347 sx_xunlock(&ifdescr_sx); 2348 2349 getmicrotime(&ifp->if_lastchange); 2350 free(odescrbuf, M_IFDESCR); 2351 break; 2352 2353 case SIOCGIFFIB: 2354 ifr->ifr_fib = ifp->if_fib; 2355 break; 2356 2357 case SIOCSIFFIB: 2358 error = priv_check(td, PRIV_NET_SETIFFIB); 2359 if (error) 2360 return (error); 2361 if (ifr->ifr_fib >= rt_numfibs) 2362 return (EINVAL); 2363 2364 ifp->if_fib = ifr->ifr_fib; 2365 break; 2366 2367 case SIOCSIFFLAGS: 2368 error = priv_check(td, PRIV_NET_SETIFFLAGS); 2369 if (error) 2370 return (error); 2371 /* 2372 * Currently, no driver owned flags pass the IFF_CANTCHANGE 2373 * check, so we don't need special handling here yet. 2374 */ 2375 new_flags = (ifr->ifr_flags & 0xffff) | 2376 (ifr->ifr_flagshigh << 16); 2377 if (ifp->if_flags & IFF_UP && 2378 (new_flags & IFF_UP) == 0) { 2379 if_down(ifp); 2380 } else if (new_flags & IFF_UP && 2381 (ifp->if_flags & IFF_UP) == 0) { 2382 if_up(ifp); 2383 } 2384 /* See if permanently promiscuous mode bit is about to flip */ 2385 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) { 2386 if (new_flags & IFF_PPROMISC) 2387 ifp->if_flags |= IFF_PROMISC; 2388 else if (ifp->if_pcount == 0) 2389 ifp->if_flags &= ~IFF_PROMISC; 2390 log(LOG_INFO, "%s: permanently promiscuous mode %s\n", 2391 ifp->if_xname, 2392 (new_flags & IFF_PPROMISC) ? "enabled" : "disabled"); 2393 } 2394 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 2395 (new_flags &~ IFF_CANTCHANGE); 2396 if (ifp->if_ioctl) { 2397 (void) (*ifp->if_ioctl)(ifp, cmd, data); 2398 } 2399 getmicrotime(&ifp->if_lastchange); 2400 break; 2401 2402 case SIOCSIFCAP: 2403 error = priv_check(td, PRIV_NET_SETIFCAP); 2404 if (error) 2405 return (error); 2406 if (ifp->if_ioctl == NULL) 2407 return (EOPNOTSUPP); 2408 if (ifr->ifr_reqcap & ~ifp->if_capabilities) 2409 return (EINVAL); 2410 error = (*ifp->if_ioctl)(ifp, cmd, data); 2411 if (error == 0) 2412 getmicrotime(&ifp->if_lastchange); 2413 break; 2414 2415 #ifdef MAC 2416 case SIOCSIFMAC: 2417 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp); 2418 break; 2419 #endif 2420 2421 case SIOCSIFNAME: 2422 error = priv_check(td, PRIV_NET_SETIFNAME); 2423 if (error) 2424 return (error); 2425 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 2426 if (error != 0) 2427 return (error); 2428 if (new_name[0] == '\0') 2429 return (EINVAL); 2430 if (ifunit(new_name) != NULL) 2431 return (EEXIST); 2432 2433 /* 2434 * XXX: Locking. Nothing else seems to lock if_flags, 2435 * and there are numerous other races with the 2436 * ifunit() checks not being atomic with namespace 2437 * changes (renames, vmoves, if_attach, etc). 2438 */ 2439 ifp->if_flags |= IFF_RENAMING; 2440 2441 /* Announce the departure of the interface. */ 2442 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 2443 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 2444 2445 log(LOG_INFO, "%s: changing name to '%s'\n", 2446 ifp->if_xname, new_name); 2447 2448 IF_ADDR_WLOCK(ifp); 2449 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 2450 ifa = ifp->if_addr; 2451 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 2452 namelen = strlen(new_name); 2453 onamelen = sdl->sdl_nlen; 2454 /* 2455 * Move the address if needed. This is safe because we 2456 * allocate space for a name of length IFNAMSIZ when we 2457 * create this in if_attach(). 2458 */ 2459 if (namelen != onamelen) { 2460 bcopy(sdl->sdl_data + onamelen, 2461 sdl->sdl_data + namelen, sdl->sdl_alen); 2462 } 2463 bcopy(new_name, sdl->sdl_data, namelen); 2464 sdl->sdl_nlen = namelen; 2465 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 2466 bzero(sdl->sdl_data, onamelen); 2467 while (namelen != 0) 2468 sdl->sdl_data[--namelen] = 0xff; 2469 IF_ADDR_WUNLOCK(ifp); 2470 2471 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 2472 /* Announce the return of the interface. */ 2473 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 2474 2475 ifp->if_flags &= ~IFF_RENAMING; 2476 break; 2477 2478 #ifdef VIMAGE 2479 case SIOCSIFVNET: 2480 error = priv_check(td, PRIV_NET_SETIFVNET); 2481 if (error) 2482 return (error); 2483 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid); 2484 break; 2485 #endif 2486 2487 case SIOCSIFMETRIC: 2488 error = priv_check(td, PRIV_NET_SETIFMETRIC); 2489 if (error) 2490 return (error); 2491 ifp->if_metric = ifr->ifr_metric; 2492 getmicrotime(&ifp->if_lastchange); 2493 break; 2494 2495 case SIOCSIFPHYS: 2496 error = priv_check(td, PRIV_NET_SETIFPHYS); 2497 if (error) 2498 return (error); 2499 if (ifp->if_ioctl == NULL) 2500 return (EOPNOTSUPP); 2501 error = (*ifp->if_ioctl)(ifp, cmd, data); 2502 if (error == 0) 2503 getmicrotime(&ifp->if_lastchange); 2504 break; 2505 2506 case SIOCSIFMTU: 2507 { 2508 u_long oldmtu = ifp->if_mtu; 2509 2510 error = priv_check(td, PRIV_NET_SETIFMTU); 2511 if (error) 2512 return (error); 2513 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) 2514 return (EINVAL); 2515 if (ifp->if_ioctl == NULL) 2516 return (EOPNOTSUPP); 2517 error = (*ifp->if_ioctl)(ifp, cmd, data); 2518 if (error == 0) { 2519 getmicrotime(&ifp->if_lastchange); 2520 rt_ifmsg(ifp); 2521 } 2522 /* 2523 * If the link MTU changed, do network layer specific procedure. 2524 */ 2525 if (ifp->if_mtu != oldmtu) { 2526 #ifdef INET6 2527 nd6_setmtu(ifp); 2528 #endif 2529 } 2530 break; 2531 } 2532 2533 case SIOCADDMULTI: 2534 case SIOCDELMULTI: 2535 if (cmd == SIOCADDMULTI) 2536 error = priv_check(td, PRIV_NET_ADDMULTI); 2537 else 2538 error = priv_check(td, PRIV_NET_DELMULTI); 2539 if (error) 2540 return (error); 2541 2542 /* Don't allow group membership on non-multicast interfaces. */ 2543 if ((ifp->if_flags & IFF_MULTICAST) == 0) 2544 return (EOPNOTSUPP); 2545 2546 /* Don't let users screw up protocols' entries. */ 2547 if (ifr->ifr_addr.sa_family != AF_LINK) 2548 return (EINVAL); 2549 2550 if (cmd == SIOCADDMULTI) { 2551 struct ifmultiaddr *ifma; 2552 2553 /* 2554 * Userland is only permitted to join groups once 2555 * via the if_addmulti() KPI, because it cannot hold 2556 * struct ifmultiaddr * between calls. It may also 2557 * lose a race while we check if the membership 2558 * already exists. 2559 */ 2560 IF_ADDR_RLOCK(ifp); 2561 ifma = if_findmulti(ifp, &ifr->ifr_addr); 2562 IF_ADDR_RUNLOCK(ifp); 2563 if (ifma != NULL) 2564 error = EADDRINUSE; 2565 else 2566 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 2567 } else { 2568 error = if_delmulti(ifp, &ifr->ifr_addr); 2569 } 2570 if (error == 0) 2571 getmicrotime(&ifp->if_lastchange); 2572 break; 2573 2574 case SIOCSIFPHYADDR: 2575 case SIOCDIFPHYADDR: 2576 #ifdef INET6 2577 case SIOCSIFPHYADDR_IN6: 2578 #endif 2579 case SIOCSIFMEDIA: 2580 case SIOCSIFGENERIC: 2581 error = priv_check(td, PRIV_NET_HWIOCTL); 2582 if (error) 2583 return (error); 2584 if (ifp->if_ioctl == NULL) 2585 return (EOPNOTSUPP); 2586 error = (*ifp->if_ioctl)(ifp, cmd, data); 2587 if (error == 0) 2588 getmicrotime(&ifp->if_lastchange); 2589 break; 2590 2591 case SIOCGIFSTATUS: 2592 case SIOCGIFPSRCADDR: 2593 case SIOCGIFPDSTADDR: 2594 case SIOCGIFMEDIA: 2595 case SIOCGIFGENERIC: 2596 if (ifp->if_ioctl == NULL) 2597 return (EOPNOTSUPP); 2598 error = (*ifp->if_ioctl)(ifp, cmd, data); 2599 break; 2600 2601 case SIOCSIFLLADDR: 2602 error = priv_check(td, PRIV_NET_SETLLADDR); 2603 if (error) 2604 return (error); 2605 error = if_setlladdr(ifp, 2606 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); 2607 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 2608 break; 2609 2610 case SIOCAIFGROUP: 2611 { 2612 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2613 2614 error = priv_check(td, PRIV_NET_ADDIFGROUP); 2615 if (error) 2616 return (error); 2617 if ((error = if_addgroup(ifp, ifgr->ifgr_group))) 2618 return (error); 2619 break; 2620 } 2621 2622 case SIOCGIFGROUP: 2623 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp))) 2624 return (error); 2625 break; 2626 2627 case SIOCDIFGROUP: 2628 { 2629 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2630 2631 error = priv_check(td, PRIV_NET_DELIFGROUP); 2632 if (error) 2633 return (error); 2634 if ((error = if_delgroup(ifp, ifgr->ifgr_group))) 2635 return (error); 2636 break; 2637 } 2638 2639 default: 2640 error = ENOIOCTL; 2641 break; 2642 } 2643 return (error); 2644 } 2645 2646 #ifdef COMPAT_FREEBSD32 2647 struct ifconf32 { 2648 int32_t ifc_len; 2649 union { 2650 uint32_t ifcu_buf; 2651 uint32_t ifcu_req; 2652 } ifc_ifcu; 2653 }; 2654 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32) 2655 #endif 2656 2657 /* 2658 * Interface ioctls. 2659 */ 2660 int 2661 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td) 2662 { 2663 struct ifnet *ifp; 2664 struct ifreq *ifr; 2665 int error; 2666 int oif_flags; 2667 2668 CURVNET_SET(so->so_vnet); 2669 switch (cmd) { 2670 case SIOCGIFCONF: 2671 error = ifconf(cmd, data); 2672 CURVNET_RESTORE(); 2673 return (error); 2674 2675 #ifdef COMPAT_FREEBSD32 2676 case SIOCGIFCONF32: 2677 { 2678 struct ifconf32 *ifc32; 2679 struct ifconf ifc; 2680 2681 ifc32 = (struct ifconf32 *)data; 2682 ifc.ifc_len = ifc32->ifc_len; 2683 ifc.ifc_buf = PTRIN(ifc32->ifc_buf); 2684 2685 error = ifconf(SIOCGIFCONF, (void *)&ifc); 2686 CURVNET_RESTORE(); 2687 if (error == 0) 2688 ifc32->ifc_len = ifc.ifc_len; 2689 return (error); 2690 } 2691 #endif 2692 } 2693 ifr = (struct ifreq *)data; 2694 2695 switch (cmd) { 2696 #ifdef VIMAGE 2697 case SIOCSIFRVNET: 2698 error = priv_check(td, PRIV_NET_SETIFVNET); 2699 if (error == 0) 2700 error = if_vmove_reclaim(td, ifr->ifr_name, 2701 ifr->ifr_jid); 2702 CURVNET_RESTORE(); 2703 return (error); 2704 #endif 2705 case SIOCIFCREATE: 2706 case SIOCIFCREATE2: 2707 error = priv_check(td, PRIV_NET_IFCREATE); 2708 if (error == 0) 2709 error = if_clone_create(ifr->ifr_name, 2710 sizeof(ifr->ifr_name), 2711 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL); 2712 CURVNET_RESTORE(); 2713 return (error); 2714 case SIOCIFDESTROY: 2715 error = priv_check(td, PRIV_NET_IFDESTROY); 2716 if (error == 0) 2717 error = if_clone_destroy(ifr->ifr_name); 2718 CURVNET_RESTORE(); 2719 return (error); 2720 2721 case SIOCIFGCLONERS: 2722 error = if_clone_list((struct if_clonereq *)data); 2723 CURVNET_RESTORE(); 2724 return (error); 2725 case SIOCGIFGMEMB: 2726 error = if_getgroupmembers((struct ifgroupreq *)data); 2727 CURVNET_RESTORE(); 2728 return (error); 2729 #if defined(INET) || defined(INET6) 2730 case SIOCSVH: 2731 case SIOCGVH: 2732 if (carp_ioctl_p == NULL) 2733 error = EPROTONOSUPPORT; 2734 else 2735 error = (*carp_ioctl_p)(ifr, cmd, td); 2736 CURVNET_RESTORE(); 2737 return (error); 2738 #endif 2739 } 2740 2741 ifp = ifunit_ref(ifr->ifr_name); 2742 if (ifp == NULL) { 2743 CURVNET_RESTORE(); 2744 return (ENXIO); 2745 } 2746 2747 error = ifhwioctl(cmd, ifp, data, td); 2748 if (error != ENOIOCTL) { 2749 if_rele(ifp); 2750 CURVNET_RESTORE(); 2751 return (error); 2752 } 2753 2754 oif_flags = ifp->if_flags; 2755 if (so->so_proto == NULL) { 2756 if_rele(ifp); 2757 CURVNET_RESTORE(); 2758 return (EOPNOTSUPP); 2759 } 2760 2761 /* 2762 * Pass the request on to the socket control method, and if the 2763 * latter returns EOPNOTSUPP, directly to the interface. 2764 * 2765 * Make an exception for the legacy SIOCSIF* requests. Drivers 2766 * trust SIOCSIFADDR et al to come from an already privileged 2767 * layer, and do not perform any credentials checks or input 2768 * validation. 2769 */ 2770 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 2771 ifp, td)); 2772 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL && 2773 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR && 2774 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK) 2775 error = (*ifp->if_ioctl)(ifp, cmd, data); 2776 2777 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 2778 #ifdef INET6 2779 if (ifp->if_flags & IFF_UP) 2780 in6_if_up(ifp); 2781 #endif 2782 } 2783 if_rele(ifp); 2784 CURVNET_RESTORE(); 2785 return (error); 2786 } 2787 2788 /* 2789 * The code common to handling reference counted flags, 2790 * e.g., in ifpromisc() and if_allmulti(). 2791 * The "pflag" argument can specify a permanent mode flag to check, 2792 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none. 2793 * 2794 * Only to be used on stack-owned flags, not driver-owned flags. 2795 */ 2796 static int 2797 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch) 2798 { 2799 struct ifreq ifr; 2800 int error; 2801 int oldflags, oldcount; 2802 2803 /* Sanity checks to catch programming errors */ 2804 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0, 2805 ("%s: setting driver-owned flag %d", __func__, flag)); 2806 2807 if (onswitch) 2808 KASSERT(*refcount >= 0, 2809 ("%s: increment negative refcount %d for flag %d", 2810 __func__, *refcount, flag)); 2811 else 2812 KASSERT(*refcount > 0, 2813 ("%s: decrement non-positive refcount %d for flag %d", 2814 __func__, *refcount, flag)); 2815 2816 /* In case this mode is permanent, just touch refcount */ 2817 if (ifp->if_flags & pflag) { 2818 *refcount += onswitch ? 1 : -1; 2819 return (0); 2820 } 2821 2822 /* Save ifnet parameters for if_ioctl() may fail */ 2823 oldcount = *refcount; 2824 oldflags = ifp->if_flags; 2825 2826 /* 2827 * See if we aren't the only and touching refcount is enough. 2828 * Actually toggle interface flag if we are the first or last. 2829 */ 2830 if (onswitch) { 2831 if ((*refcount)++) 2832 return (0); 2833 ifp->if_flags |= flag; 2834 } else { 2835 if (--(*refcount)) 2836 return (0); 2837 ifp->if_flags &= ~flag; 2838 } 2839 2840 /* Call down the driver since we've changed interface flags */ 2841 if (ifp->if_ioctl == NULL) { 2842 error = EOPNOTSUPP; 2843 goto recover; 2844 } 2845 ifr.ifr_flags = ifp->if_flags & 0xffff; 2846 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2847 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 2848 if (error) 2849 goto recover; 2850 /* Notify userland that interface flags have changed */ 2851 rt_ifmsg(ifp); 2852 return (0); 2853 2854 recover: 2855 /* Recover after driver error */ 2856 *refcount = oldcount; 2857 ifp->if_flags = oldflags; 2858 return (error); 2859 } 2860 2861 /* 2862 * Set/clear promiscuous mode on interface ifp based on the truth value 2863 * of pswitch. The calls are reference counted so that only the first 2864 * "on" request actually has an effect, as does the final "off" request. 2865 * Results are undefined if the "off" and "on" requests are not matched. 2866 */ 2867 int 2868 ifpromisc(struct ifnet *ifp, int pswitch) 2869 { 2870 int error; 2871 int oldflags = ifp->if_flags; 2872 2873 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC, 2874 &ifp->if_pcount, pswitch); 2875 /* If promiscuous mode status has changed, log a message */ 2876 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC)) 2877 log(LOG_INFO, "%s: promiscuous mode %s\n", 2878 ifp->if_xname, 2879 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled"); 2880 return (error); 2881 } 2882 2883 /* 2884 * Return interface configuration 2885 * of system. List may be used 2886 * in later ioctl's (above) to get 2887 * other information. 2888 */ 2889 /*ARGSUSED*/ 2890 static int 2891 ifconf(u_long cmd, caddr_t data) 2892 { 2893 struct ifconf *ifc = (struct ifconf *)data; 2894 struct ifnet *ifp; 2895 struct ifaddr *ifa; 2896 struct ifreq ifr; 2897 struct sbuf *sb; 2898 int error, full = 0, valid_len, max_len; 2899 2900 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */ 2901 max_len = MAXPHYS - 1; 2902 2903 /* Prevent hostile input from being able to crash the system */ 2904 if (ifc->ifc_len <= 0) 2905 return (EINVAL); 2906 2907 again: 2908 if (ifc->ifc_len <= max_len) { 2909 max_len = ifc->ifc_len; 2910 full = 1; 2911 } 2912 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN); 2913 max_len = 0; 2914 valid_len = 0; 2915 2916 IFNET_RLOCK(); 2917 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2918 int addrs; 2919 2920 /* 2921 * Zero the ifr_name buffer to make sure we don't 2922 * disclose the contents of the stack. 2923 */ 2924 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name)); 2925 2926 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 2927 >= sizeof(ifr.ifr_name)) { 2928 sbuf_delete(sb); 2929 IFNET_RUNLOCK(); 2930 return (ENAMETOOLONG); 2931 } 2932 2933 addrs = 0; 2934 IF_ADDR_RLOCK(ifp); 2935 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2936 struct sockaddr *sa = ifa->ifa_addr; 2937 2938 if (prison_if(curthread->td_ucred, sa) != 0) 2939 continue; 2940 addrs++; 2941 if (sa->sa_len <= sizeof(*sa)) { 2942 ifr.ifr_addr = *sa; 2943 sbuf_bcat(sb, &ifr, sizeof(ifr)); 2944 max_len += sizeof(ifr); 2945 } else { 2946 sbuf_bcat(sb, &ifr, 2947 offsetof(struct ifreq, ifr_addr)); 2948 max_len += offsetof(struct ifreq, ifr_addr); 2949 sbuf_bcat(sb, sa, sa->sa_len); 2950 max_len += sa->sa_len; 2951 } 2952 2953 if (sbuf_error(sb) == 0) 2954 valid_len = sbuf_len(sb); 2955 } 2956 IF_ADDR_RUNLOCK(ifp); 2957 if (addrs == 0) { 2958 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr)); 2959 sbuf_bcat(sb, &ifr, sizeof(ifr)); 2960 max_len += sizeof(ifr); 2961 2962 if (sbuf_error(sb) == 0) 2963 valid_len = sbuf_len(sb); 2964 } 2965 } 2966 IFNET_RUNLOCK(); 2967 2968 /* 2969 * If we didn't allocate enough space (uncommon), try again. If 2970 * we have already allocated as much space as we are allowed, 2971 * return what we've got. 2972 */ 2973 if (valid_len != max_len && !full) { 2974 sbuf_delete(sb); 2975 goto again; 2976 } 2977 2978 ifc->ifc_len = valid_len; 2979 sbuf_finish(sb); 2980 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len); 2981 sbuf_delete(sb); 2982 return (error); 2983 } 2984 2985 /* 2986 * Just like ifpromisc(), but for all-multicast-reception mode. 2987 */ 2988 int 2989 if_allmulti(struct ifnet *ifp, int onswitch) 2990 { 2991 2992 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch)); 2993 } 2994 2995 struct ifmultiaddr * 2996 if_findmulti(struct ifnet *ifp, struct sockaddr *sa) 2997 { 2998 struct ifmultiaddr *ifma; 2999 3000 IF_ADDR_LOCK_ASSERT(ifp); 3001 3002 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 3003 if (sa->sa_family == AF_LINK) { 3004 if (sa_dl_equal(ifma->ifma_addr, sa)) 3005 break; 3006 } else { 3007 if (sa_equal(ifma->ifma_addr, sa)) 3008 break; 3009 } 3010 } 3011 3012 return ifma; 3013 } 3014 3015 /* 3016 * Allocate a new ifmultiaddr and initialize based on passed arguments. We 3017 * make copies of passed sockaddrs. The ifmultiaddr will not be added to 3018 * the ifnet multicast address list here, so the caller must do that and 3019 * other setup work (such as notifying the device driver). The reference 3020 * count is initialized to 1. 3021 */ 3022 static struct ifmultiaddr * 3023 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa, 3024 int mflags) 3025 { 3026 struct ifmultiaddr *ifma; 3027 struct sockaddr *dupsa; 3028 3029 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags | 3030 M_ZERO); 3031 if (ifma == NULL) 3032 return (NULL); 3033 3034 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags); 3035 if (dupsa == NULL) { 3036 free(ifma, M_IFMADDR); 3037 return (NULL); 3038 } 3039 bcopy(sa, dupsa, sa->sa_len); 3040 ifma->ifma_addr = dupsa; 3041 3042 ifma->ifma_ifp = ifp; 3043 ifma->ifma_refcount = 1; 3044 ifma->ifma_protospec = NULL; 3045 3046 if (llsa == NULL) { 3047 ifma->ifma_lladdr = NULL; 3048 return (ifma); 3049 } 3050 3051 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags); 3052 if (dupsa == NULL) { 3053 free(ifma->ifma_addr, M_IFMADDR); 3054 free(ifma, M_IFMADDR); 3055 return (NULL); 3056 } 3057 bcopy(llsa, dupsa, llsa->sa_len); 3058 ifma->ifma_lladdr = dupsa; 3059 3060 return (ifma); 3061 } 3062 3063 /* 3064 * if_freemulti: free ifmultiaddr structure and possibly attached related 3065 * addresses. The caller is responsible for implementing reference 3066 * counting, notifying the driver, handling routing messages, and releasing 3067 * any dependent link layer state. 3068 */ 3069 static void 3070 if_freemulti(struct ifmultiaddr *ifma) 3071 { 3072 3073 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d", 3074 ifma->ifma_refcount)); 3075 3076 if (ifma->ifma_lladdr != NULL) 3077 free(ifma->ifma_lladdr, M_IFMADDR); 3078 free(ifma->ifma_addr, M_IFMADDR); 3079 free(ifma, M_IFMADDR); 3080 } 3081 3082 /* 3083 * Register an additional multicast address with a network interface. 3084 * 3085 * - If the address is already present, bump the reference count on the 3086 * address and return. 3087 * - If the address is not link-layer, look up a link layer address. 3088 * - Allocate address structures for one or both addresses, and attach to the 3089 * multicast address list on the interface. If automatically adding a link 3090 * layer address, the protocol address will own a reference to the link 3091 * layer address, to be freed when it is freed. 3092 * - Notify the network device driver of an addition to the multicast address 3093 * list. 3094 * 3095 * 'sa' points to caller-owned memory with the desired multicast address. 3096 * 3097 * 'retifma' will be used to return a pointer to the resulting multicast 3098 * address reference, if desired. 3099 */ 3100 int 3101 if_addmulti(struct ifnet *ifp, struct sockaddr *sa, 3102 struct ifmultiaddr **retifma) 3103 { 3104 struct ifmultiaddr *ifma, *ll_ifma; 3105 struct sockaddr *llsa; 3106 struct sockaddr_dl sdl; 3107 int error; 3108 3109 /* 3110 * If the address is already present, return a new reference to it; 3111 * otherwise, allocate storage and set up a new address. 3112 */ 3113 IF_ADDR_WLOCK(ifp); 3114 ifma = if_findmulti(ifp, sa); 3115 if (ifma != NULL) { 3116 ifma->ifma_refcount++; 3117 if (retifma != NULL) 3118 *retifma = ifma; 3119 IF_ADDR_WUNLOCK(ifp); 3120 return (0); 3121 } 3122 3123 /* 3124 * The address isn't already present; resolve the protocol address 3125 * into a link layer address, and then look that up, bump its 3126 * refcount or allocate an ifma for that also. 3127 * Most link layer resolving functions returns address data which 3128 * fits inside default sockaddr_dl structure. However callback 3129 * can allocate another sockaddr structure, in that case we need to 3130 * free it later. 3131 */ 3132 llsa = NULL; 3133 ll_ifma = NULL; 3134 if (ifp->if_resolvemulti != NULL) { 3135 /* Provide called function with buffer size information */ 3136 sdl.sdl_len = sizeof(sdl); 3137 llsa = (struct sockaddr *)&sdl; 3138 error = ifp->if_resolvemulti(ifp, &llsa, sa); 3139 if (error) 3140 goto unlock_out; 3141 } 3142 3143 /* 3144 * Allocate the new address. Don't hook it up yet, as we may also 3145 * need to allocate a link layer multicast address. 3146 */ 3147 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT); 3148 if (ifma == NULL) { 3149 error = ENOMEM; 3150 goto free_llsa_out; 3151 } 3152 3153 /* 3154 * If a link layer address is found, we'll need to see if it's 3155 * already present in the address list, or allocate is as well. 3156 * When this block finishes, the link layer address will be on the 3157 * list. 3158 */ 3159 if (llsa != NULL) { 3160 ll_ifma = if_findmulti(ifp, llsa); 3161 if (ll_ifma == NULL) { 3162 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT); 3163 if (ll_ifma == NULL) { 3164 --ifma->ifma_refcount; 3165 if_freemulti(ifma); 3166 error = ENOMEM; 3167 goto free_llsa_out; 3168 } 3169 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma, 3170 ifma_link); 3171 } else 3172 ll_ifma->ifma_refcount++; 3173 ifma->ifma_llifma = ll_ifma; 3174 } 3175 3176 /* 3177 * We now have a new multicast address, ifma, and possibly a new or 3178 * referenced link layer address. Add the primary address to the 3179 * ifnet address list. 3180 */ 3181 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 3182 3183 if (retifma != NULL) 3184 *retifma = ifma; 3185 3186 /* 3187 * Must generate the message while holding the lock so that 'ifma' 3188 * pointer is still valid. 3189 */ 3190 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 3191 IF_ADDR_WUNLOCK(ifp); 3192 3193 /* 3194 * We are certain we have added something, so call down to the 3195 * interface to let them know about it. 3196 */ 3197 if (ifp->if_ioctl != NULL) { 3198 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0); 3199 } 3200 3201 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3202 link_free_sdl(llsa); 3203 3204 return (0); 3205 3206 free_llsa_out: 3207 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3208 link_free_sdl(llsa); 3209 3210 unlock_out: 3211 IF_ADDR_WUNLOCK(ifp); 3212 return (error); 3213 } 3214 3215 /* 3216 * Delete a multicast group membership by network-layer group address. 3217 * 3218 * Returns ENOENT if the entry could not be found. If ifp no longer 3219 * exists, results are undefined. This entry point should only be used 3220 * from subsystems which do appropriate locking to hold ifp for the 3221 * duration of the call. 3222 * Network-layer protocol domains must use if_delmulti_ifma(). 3223 */ 3224 int 3225 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 3226 { 3227 struct ifmultiaddr *ifma; 3228 int lastref; 3229 #ifdef INVARIANTS 3230 struct ifnet *oifp; 3231 3232 IFNET_RLOCK_NOSLEEP(); 3233 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3234 if (ifp == oifp) 3235 break; 3236 if (ifp != oifp) 3237 ifp = NULL; 3238 IFNET_RUNLOCK_NOSLEEP(); 3239 3240 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__)); 3241 #endif 3242 if (ifp == NULL) 3243 return (ENOENT); 3244 3245 IF_ADDR_WLOCK(ifp); 3246 lastref = 0; 3247 ifma = if_findmulti(ifp, sa); 3248 if (ifma != NULL) 3249 lastref = if_delmulti_locked(ifp, ifma, 0); 3250 IF_ADDR_WUNLOCK(ifp); 3251 3252 if (ifma == NULL) 3253 return (ENOENT); 3254 3255 if (lastref && ifp->if_ioctl != NULL) { 3256 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3257 } 3258 3259 return (0); 3260 } 3261 3262 /* 3263 * Delete all multicast group membership for an interface. 3264 * Should be used to quickly flush all multicast filters. 3265 */ 3266 void 3267 if_delallmulti(struct ifnet *ifp) 3268 { 3269 struct ifmultiaddr *ifma; 3270 struct ifmultiaddr *next; 3271 3272 IF_ADDR_WLOCK(ifp); 3273 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 3274 if_delmulti_locked(ifp, ifma, 0); 3275 IF_ADDR_WUNLOCK(ifp); 3276 } 3277 3278 /* 3279 * Delete a multicast group membership by group membership pointer. 3280 * Network-layer protocol domains must use this routine. 3281 * 3282 * It is safe to call this routine if the ifp disappeared. 3283 */ 3284 void 3285 if_delmulti_ifma(struct ifmultiaddr *ifma) 3286 { 3287 struct ifnet *ifp; 3288 int lastref; 3289 3290 ifp = ifma->ifma_ifp; 3291 #ifdef DIAGNOSTIC 3292 if (ifp == NULL) { 3293 printf("%s: ifma_ifp seems to be detached\n", __func__); 3294 } else { 3295 struct ifnet *oifp; 3296 3297 IFNET_RLOCK_NOSLEEP(); 3298 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3299 if (ifp == oifp) 3300 break; 3301 if (ifp != oifp) { 3302 printf("%s: ifnet %p disappeared\n", __func__, ifp); 3303 ifp = NULL; 3304 } 3305 IFNET_RUNLOCK_NOSLEEP(); 3306 } 3307 #endif 3308 /* 3309 * If and only if the ifnet instance exists: Acquire the address lock. 3310 */ 3311 if (ifp != NULL) 3312 IF_ADDR_WLOCK(ifp); 3313 3314 lastref = if_delmulti_locked(ifp, ifma, 0); 3315 3316 if (ifp != NULL) { 3317 /* 3318 * If and only if the ifnet instance exists: 3319 * Release the address lock. 3320 * If the group was left: update the hardware hash filter. 3321 */ 3322 IF_ADDR_WUNLOCK(ifp); 3323 if (lastref && ifp->if_ioctl != NULL) { 3324 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3325 } 3326 } 3327 } 3328 3329 /* 3330 * Perform deletion of network-layer and/or link-layer multicast address. 3331 * 3332 * Return 0 if the reference count was decremented. 3333 * Return 1 if the final reference was released, indicating that the 3334 * hardware hash filter should be reprogrammed. 3335 */ 3336 static int 3337 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching) 3338 { 3339 struct ifmultiaddr *ll_ifma; 3340 3341 if (ifp != NULL && ifma->ifma_ifp != NULL) { 3342 KASSERT(ifma->ifma_ifp == ifp, 3343 ("%s: inconsistent ifp %p", __func__, ifp)); 3344 IF_ADDR_WLOCK_ASSERT(ifp); 3345 } 3346 3347 ifp = ifma->ifma_ifp; 3348 3349 /* 3350 * If the ifnet is detaching, null out references to ifnet, 3351 * so that upper protocol layers will notice, and not attempt 3352 * to obtain locks for an ifnet which no longer exists. The 3353 * routing socket announcement must happen before the ifnet 3354 * instance is detached from the system. 3355 */ 3356 if (detaching) { 3357 #ifdef DIAGNOSTIC 3358 printf("%s: detaching ifnet instance %p\n", __func__, ifp); 3359 #endif 3360 /* 3361 * ifp may already be nulled out if we are being reentered 3362 * to delete the ll_ifma. 3363 */ 3364 if (ifp != NULL) { 3365 rt_newmaddrmsg(RTM_DELMADDR, ifma); 3366 ifma->ifma_ifp = NULL; 3367 } 3368 } 3369 3370 if (--ifma->ifma_refcount > 0) 3371 return 0; 3372 3373 /* 3374 * If this ifma is a network-layer ifma, a link-layer ifma may 3375 * have been associated with it. Release it first if so. 3376 */ 3377 ll_ifma = ifma->ifma_llifma; 3378 if (ll_ifma != NULL) { 3379 KASSERT(ifma->ifma_lladdr != NULL, 3380 ("%s: llifma w/o lladdr", __func__)); 3381 if (detaching) 3382 ll_ifma->ifma_ifp = NULL; /* XXX */ 3383 if (--ll_ifma->ifma_refcount == 0) { 3384 if (ifp != NULL) { 3385 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, 3386 ifma_link); 3387 } 3388 if_freemulti(ll_ifma); 3389 } 3390 } 3391 3392 if (ifp != NULL) 3393 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 3394 3395 if_freemulti(ifma); 3396 3397 /* 3398 * The last reference to this instance of struct ifmultiaddr 3399 * was released; the hardware should be notified of this change. 3400 */ 3401 return 1; 3402 } 3403 3404 /* 3405 * Set the link layer address on an interface. 3406 * 3407 * At this time we only support certain types of interfaces, 3408 * and we don't allow the length of the address to change. 3409 */ 3410 int 3411 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 3412 { 3413 struct sockaddr_dl *sdl; 3414 struct ifaddr *ifa; 3415 struct ifreq ifr; 3416 3417 IF_ADDR_RLOCK(ifp); 3418 ifa = ifp->if_addr; 3419 if (ifa == NULL) { 3420 IF_ADDR_RUNLOCK(ifp); 3421 return (EINVAL); 3422 } 3423 ifa_ref(ifa); 3424 IF_ADDR_RUNLOCK(ifp); 3425 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 3426 if (sdl == NULL) { 3427 ifa_free(ifa); 3428 return (EINVAL); 3429 } 3430 if (len != sdl->sdl_alen) { /* don't allow length to change */ 3431 ifa_free(ifa); 3432 return (EINVAL); 3433 } 3434 switch (ifp->if_type) { 3435 case IFT_ETHER: 3436 case IFT_FDDI: 3437 case IFT_XETHER: 3438 case IFT_ISO88025: 3439 case IFT_L2VLAN: 3440 case IFT_BRIDGE: 3441 case IFT_ARCNET: 3442 case IFT_IEEE8023ADLAG: 3443 case IFT_IEEE80211: 3444 bcopy(lladdr, LLADDR(sdl), len); 3445 ifa_free(ifa); 3446 break; 3447 default: 3448 ifa_free(ifa); 3449 return (ENODEV); 3450 } 3451 3452 /* 3453 * If the interface is already up, we need 3454 * to re-init it in order to reprogram its 3455 * address filter. 3456 */ 3457 if ((ifp->if_flags & IFF_UP) != 0) { 3458 if (ifp->if_ioctl) { 3459 ifp->if_flags &= ~IFF_UP; 3460 ifr.ifr_flags = ifp->if_flags & 0xffff; 3461 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3462 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3463 ifp->if_flags |= IFF_UP; 3464 ifr.ifr_flags = ifp->if_flags & 0xffff; 3465 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3466 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3467 } 3468 #ifdef INET 3469 /* 3470 * Also send gratuitous ARPs to notify other nodes about 3471 * the address change. 3472 */ 3473 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 3474 if (ifa->ifa_addr->sa_family == AF_INET) 3475 arp_ifinit(ifp, ifa); 3476 } 3477 #endif 3478 } 3479 return (0); 3480 } 3481 3482 /* 3483 * The name argument must be a pointer to storage which will last as 3484 * long as the interface does. For physical devices, the result of 3485 * device_get_name(dev) is a good choice and for pseudo-devices a 3486 * static string works well. 3487 */ 3488 void 3489 if_initname(struct ifnet *ifp, const char *name, int unit) 3490 { 3491 ifp->if_dname = name; 3492 ifp->if_dunit = unit; 3493 if (unit != IF_DUNIT_NONE) 3494 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 3495 else 3496 strlcpy(ifp->if_xname, name, IFNAMSIZ); 3497 } 3498 3499 int 3500 if_printf(struct ifnet *ifp, const char * fmt, ...) 3501 { 3502 va_list ap; 3503 int retval; 3504 3505 retval = printf("%s: ", ifp->if_xname); 3506 va_start(ap, fmt); 3507 retval += vprintf(fmt, ap); 3508 va_end(ap); 3509 return (retval); 3510 } 3511 3512 void 3513 if_start(struct ifnet *ifp) 3514 { 3515 3516 (*(ifp)->if_start)(ifp); 3517 } 3518 3519 /* 3520 * Backwards compatibility interface for drivers 3521 * that have not implemented it 3522 */ 3523 static int 3524 if_transmit(struct ifnet *ifp, struct mbuf *m) 3525 { 3526 int error; 3527 3528 IFQ_HANDOFF(ifp, m, error); 3529 return (error); 3530 } 3531 3532 int 3533 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust) 3534 { 3535 int active = 0; 3536 3537 IF_LOCK(ifq); 3538 if (_IF_QFULL(ifq)) { 3539 IF_UNLOCK(ifq); 3540 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1); 3541 m_freem(m); 3542 return (0); 3543 } 3544 if (ifp != NULL) { 3545 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust); 3546 if (m->m_flags & (M_BCAST|M_MCAST)) 3547 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 3548 active = ifp->if_drv_flags & IFF_DRV_OACTIVE; 3549 } 3550 _IF_ENQUEUE(ifq, m); 3551 IF_UNLOCK(ifq); 3552 if (ifp != NULL && !active) 3553 (*(ifp)->if_start)(ifp); 3554 return (1); 3555 } 3556 3557 void 3558 if_register_com_alloc(u_char type, 3559 if_com_alloc_t *a, if_com_free_t *f) 3560 { 3561 3562 KASSERT(if_com_alloc[type] == NULL, 3563 ("if_register_com_alloc: %d already registered", type)); 3564 KASSERT(if_com_free[type] == NULL, 3565 ("if_register_com_alloc: %d free already registered", type)); 3566 3567 if_com_alloc[type] = a; 3568 if_com_free[type] = f; 3569 } 3570 3571 void 3572 if_deregister_com_alloc(u_char type) 3573 { 3574 3575 KASSERT(if_com_alloc[type] != NULL, 3576 ("if_deregister_com_alloc: %d not registered", type)); 3577 KASSERT(if_com_free[type] != NULL, 3578 ("if_deregister_com_alloc: %d free not registered", type)); 3579 if_com_alloc[type] = NULL; 3580 if_com_free[type] = NULL; 3581 } 3582 3583 /* API for driver access to network stack owned ifnet.*/ 3584 uint64_t 3585 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate) 3586 { 3587 uint64_t oldbrate; 3588 3589 oldbrate = ifp->if_baudrate; 3590 ifp->if_baudrate = baudrate; 3591 return (oldbrate); 3592 } 3593 3594 uint64_t 3595 if_getbaudrate(if_t ifp) 3596 { 3597 3598 return (((struct ifnet *)ifp)->if_baudrate); 3599 } 3600 3601 int 3602 if_setcapabilities(if_t ifp, int capabilities) 3603 { 3604 ((struct ifnet *)ifp)->if_capabilities = capabilities; 3605 return (0); 3606 } 3607 3608 int 3609 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit) 3610 { 3611 ((struct ifnet *)ifp)->if_capabilities |= setbit; 3612 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit; 3613 3614 return (0); 3615 } 3616 3617 int 3618 if_getcapabilities(if_t ifp) 3619 { 3620 return ((struct ifnet *)ifp)->if_capabilities; 3621 } 3622 3623 int 3624 if_setcapenable(if_t ifp, int capabilities) 3625 { 3626 ((struct ifnet *)ifp)->if_capenable = capabilities; 3627 return (0); 3628 } 3629 3630 int 3631 if_setcapenablebit(if_t ifp, int setcap, int clearcap) 3632 { 3633 if(setcap) 3634 ((struct ifnet *)ifp)->if_capenable |= setcap; 3635 if(clearcap) 3636 ((struct ifnet *)ifp)->if_capenable &= ~clearcap; 3637 3638 return (0); 3639 } 3640 3641 const char * 3642 if_getdname(if_t ifp) 3643 { 3644 return ((struct ifnet *)ifp)->if_dname; 3645 } 3646 3647 int 3648 if_togglecapenable(if_t ifp, int togglecap) 3649 { 3650 ((struct ifnet *)ifp)->if_capenable ^= togglecap; 3651 return (0); 3652 } 3653 3654 int 3655 if_getcapenable(if_t ifp) 3656 { 3657 return ((struct ifnet *)ifp)->if_capenable; 3658 } 3659 3660 /* 3661 * This is largely undesirable because it ties ifnet to a device, but does 3662 * provide flexiblity for an embedded product vendor. Should be used with 3663 * the understanding that it violates the interface boundaries, and should be 3664 * a last resort only. 3665 */ 3666 int 3667 if_setdev(if_t ifp, void *dev) 3668 { 3669 return (0); 3670 } 3671 3672 int 3673 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags) 3674 { 3675 ((struct ifnet *)ifp)->if_drv_flags |= set_flags; 3676 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags; 3677 3678 return (0); 3679 } 3680 3681 int 3682 if_getdrvflags(if_t ifp) 3683 { 3684 return ((struct ifnet *)ifp)->if_drv_flags; 3685 } 3686 3687 int 3688 if_setdrvflags(if_t ifp, int flags) 3689 { 3690 ((struct ifnet *)ifp)->if_drv_flags = flags; 3691 return (0); 3692 } 3693 3694 3695 int 3696 if_setflags(if_t ifp, int flags) 3697 { 3698 ((struct ifnet *)ifp)->if_flags = flags; 3699 return (0); 3700 } 3701 3702 int 3703 if_setflagbits(if_t ifp, int set, int clear) 3704 { 3705 ((struct ifnet *)ifp)->if_flags |= set; 3706 ((struct ifnet *)ifp)->if_flags &= ~clear; 3707 3708 return (0); 3709 } 3710 3711 int 3712 if_getflags(if_t ifp) 3713 { 3714 return ((struct ifnet *)ifp)->if_flags; 3715 } 3716 3717 int 3718 if_clearhwassist(if_t ifp) 3719 { 3720 ((struct ifnet *)ifp)->if_hwassist = 0; 3721 return (0); 3722 } 3723 3724 int 3725 if_sethwassistbits(if_t ifp, int toset, int toclear) 3726 { 3727 ((struct ifnet *)ifp)->if_hwassist |= toset; 3728 ((struct ifnet *)ifp)->if_hwassist &= ~toclear; 3729 3730 return (0); 3731 } 3732 3733 int 3734 if_sethwassist(if_t ifp, int hwassist_bit) 3735 { 3736 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit; 3737 return (0); 3738 } 3739 3740 int 3741 if_gethwassist(if_t ifp) 3742 { 3743 return ((struct ifnet *)ifp)->if_hwassist; 3744 } 3745 3746 int 3747 if_setmtu(if_t ifp, int mtu) 3748 { 3749 ((struct ifnet *)ifp)->if_mtu = mtu; 3750 return (0); 3751 } 3752 3753 int 3754 if_getmtu(if_t ifp) 3755 { 3756 return ((struct ifnet *)ifp)->if_mtu; 3757 } 3758 3759 int 3760 if_getmtu_family(if_t ifp, int family) 3761 { 3762 struct domain *dp; 3763 3764 for (dp = domains; dp; dp = dp->dom_next) { 3765 if (dp->dom_family == family && dp->dom_ifmtu != NULL) 3766 return (dp->dom_ifmtu((struct ifnet *)ifp)); 3767 } 3768 3769 return (((struct ifnet *)ifp)->if_mtu); 3770 } 3771 3772 int 3773 if_setsoftc(if_t ifp, void *softc) 3774 { 3775 ((struct ifnet *)ifp)->if_softc = softc; 3776 return (0); 3777 } 3778 3779 void * 3780 if_getsoftc(if_t ifp) 3781 { 3782 return ((struct ifnet *)ifp)->if_softc; 3783 } 3784 3785 void 3786 if_setrcvif(struct mbuf *m, if_t ifp) 3787 { 3788 m->m_pkthdr.rcvif = (struct ifnet *)ifp; 3789 } 3790 3791 void 3792 if_setvtag(struct mbuf *m, uint16_t tag) 3793 { 3794 m->m_pkthdr.ether_vtag = tag; 3795 } 3796 3797 uint16_t 3798 if_getvtag(struct mbuf *m) 3799 { 3800 3801 return (m->m_pkthdr.ether_vtag); 3802 } 3803 3804 int 3805 if_sendq_empty(if_t ifp) 3806 { 3807 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd); 3808 } 3809 3810 struct ifaddr * 3811 if_getifaddr(if_t ifp) 3812 { 3813 return ((struct ifnet *)ifp)->if_addr; 3814 } 3815 3816 int 3817 if_getamcount(if_t ifp) 3818 { 3819 return ((struct ifnet *)ifp)->if_amcount; 3820 } 3821 3822 3823 int 3824 if_setsendqready(if_t ifp) 3825 { 3826 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd); 3827 return (0); 3828 } 3829 3830 int 3831 if_setsendqlen(if_t ifp, int tx_desc_count) 3832 { 3833 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count); 3834 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count; 3835 3836 return (0); 3837 } 3838 3839 int 3840 if_vlantrunkinuse(if_t ifp) 3841 { 3842 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0; 3843 } 3844 3845 int 3846 if_input(if_t ifp, struct mbuf* sendmp) 3847 { 3848 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp); 3849 return (0); 3850 3851 } 3852 3853 /* XXX */ 3854 #ifndef ETH_ADDR_LEN 3855 #define ETH_ADDR_LEN 6 3856 #endif 3857 3858 int 3859 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max) 3860 { 3861 struct ifmultiaddr *ifma; 3862 uint8_t *lmta = (uint8_t *)mta; 3863 int mcnt = 0; 3864 3865 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 3866 if (ifma->ifma_addr->sa_family != AF_LINK) 3867 continue; 3868 3869 if (mcnt == max) 3870 break; 3871 3872 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 3873 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN); 3874 mcnt++; 3875 } 3876 *cnt = mcnt; 3877 3878 return (0); 3879 } 3880 3881 int 3882 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max) 3883 { 3884 int error; 3885 3886 if_maddr_rlock(ifp); 3887 error = if_setupmultiaddr(ifp, mta, cnt, max); 3888 if_maddr_runlock(ifp); 3889 return (error); 3890 } 3891 3892 int 3893 if_multiaddr_count(if_t ifp, int max) 3894 { 3895 struct ifmultiaddr *ifma; 3896 int count; 3897 3898 count = 0; 3899 if_maddr_rlock(ifp); 3900 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 3901 if (ifma->ifma_addr->sa_family != AF_LINK) 3902 continue; 3903 count++; 3904 if (count == max) 3905 break; 3906 } 3907 if_maddr_runlock(ifp); 3908 return (count); 3909 } 3910 3911 struct mbuf * 3912 if_dequeue(if_t ifp) 3913 { 3914 struct mbuf *m; 3915 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m); 3916 3917 return (m); 3918 } 3919 3920 int 3921 if_sendq_prepend(if_t ifp, struct mbuf *m) 3922 { 3923 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m); 3924 return (0); 3925 } 3926 3927 int 3928 if_setifheaderlen(if_t ifp, int len) 3929 { 3930 ((struct ifnet *)ifp)->if_hdrlen = len; 3931 return (0); 3932 } 3933 3934 caddr_t 3935 if_getlladdr(if_t ifp) 3936 { 3937 return (IF_LLADDR((struct ifnet *)ifp)); 3938 } 3939 3940 void * 3941 if_gethandle(u_char type) 3942 { 3943 return (if_alloc(type)); 3944 } 3945 3946 void 3947 if_bpfmtap(if_t ifh, struct mbuf *m) 3948 { 3949 struct ifnet *ifp = (struct ifnet *)ifh; 3950 3951 BPF_MTAP(ifp, m); 3952 } 3953 3954 void 3955 if_etherbpfmtap(if_t ifh, struct mbuf *m) 3956 { 3957 struct ifnet *ifp = (struct ifnet *)ifh; 3958 3959 ETHER_BPF_MTAP(ifp, m); 3960 } 3961 3962 void 3963 if_vlancap(if_t ifh) 3964 { 3965 struct ifnet *ifp = (struct ifnet *)ifh; 3966 VLAN_CAPABILITIES(ifp); 3967 } 3968 3969 void 3970 if_setinitfn(if_t ifp, void (*init_fn)(void *)) 3971 { 3972 ((struct ifnet *)ifp)->if_init = init_fn; 3973 } 3974 3975 void 3976 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t)) 3977 { 3978 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn; 3979 } 3980 3981 void 3982 if_setstartfn(if_t ifp, void (*start_fn)(if_t)) 3983 { 3984 ((struct ifnet *)ifp)->if_start = (void *)start_fn; 3985 } 3986 3987 void 3988 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn) 3989 { 3990 ((struct ifnet *)ifp)->if_transmit = start_fn; 3991 } 3992 3993 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn) 3994 { 3995 ((struct ifnet *)ifp)->if_qflush = flush_fn; 3996 3997 } 3998 3999 void 4000 if_setgetcounterfn(if_t ifp, if_get_counter_t fn) 4001 { 4002 4003 ifp->if_get_counter = fn; 4004 } 4005 4006 /* Revisit these - These are inline functions originally. */ 4007 int 4008 drbr_inuse_drv(if_t ifh, struct buf_ring *br) 4009 { 4010 return drbr_inuse_drv(ifh, br); 4011 } 4012 4013 struct mbuf* 4014 drbr_dequeue_drv(if_t ifh, struct buf_ring *br) 4015 { 4016 return drbr_dequeue(ifh, br); 4017 } 4018 4019 int 4020 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br) 4021 { 4022 return drbr_needs_enqueue(ifh, br); 4023 } 4024 4025 int 4026 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m) 4027 { 4028 return drbr_enqueue(ifh, br, m); 4029 4030 } 4031