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 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)if.c 8.5 (Berkeley) 1/9/95 30 * $FreeBSD$ 31 */ 32 33 #include "opt_compat.h" 34 #include "opt_inet6.h" 35 #include "opt_inet.h" 36 37 #include <sys/param.h> 38 #include <sys/types.h> 39 #include <sys/conf.h> 40 #include <sys/malloc.h> 41 #include <sys/sbuf.h> 42 #include <sys/bus.h> 43 #include <sys/mbuf.h> 44 #include <sys/systm.h> 45 #include <sys/priv.h> 46 #include <sys/proc.h> 47 #include <sys/socket.h> 48 #include <sys/socketvar.h> 49 #include <sys/protosw.h> 50 #include <sys/kernel.h> 51 #include <sys/lock.h> 52 #include <sys/refcount.h> 53 #include <sys/module.h> 54 #include <sys/rwlock.h> 55 #include <sys/sockio.h> 56 #include <sys/syslog.h> 57 #include <sys/sysctl.h> 58 #include <sys/taskqueue.h> 59 #include <sys/domain.h> 60 #include <sys/jail.h> 61 #include <sys/priv.h> 62 63 #include <machine/stdarg.h> 64 #include <vm/uma.h> 65 66 #include <net/bpf.h> 67 #include <net/ethernet.h> 68 #include <net/if.h> 69 #include <net/if_arp.h> 70 #include <net/if_clone.h> 71 #include <net/if_dl.h> 72 #include <net/if_types.h> 73 #include <net/if_var.h> 74 #include <net/if_media.h> 75 #include <net/if_vlan_var.h> 76 #include <net/radix.h> 77 #include <net/route.h> 78 #include <net/vnet.h> 79 80 #if defined(INET) || defined(INET6) 81 #include <net/ethernet.h> 82 #include <netinet/in.h> 83 #include <netinet/in_var.h> 84 #include <netinet/ip.h> 85 #include <netinet/ip_carp.h> 86 #ifdef INET 87 #include <netinet/if_ether.h> 88 #endif /* INET */ 89 #ifdef INET6 90 #include <netinet6/in6_var.h> 91 #include <netinet6/in6_ifattach.h> 92 #endif /* INET6 */ 93 #endif /* INET || INET6 */ 94 95 #include <security/mac/mac_framework.h> 96 97 #ifdef COMPAT_FREEBSD32 98 #include <sys/mount.h> 99 #include <compat/freebsd32/freebsd32.h> 100 #endif 101 102 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers"); 103 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management"); 104 105 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN, 106 &ifqmaxlen, 0, "max send queue size"); 107 108 /* Log link state change events */ 109 static int log_link_state_change = 1; 110 111 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW, 112 &log_link_state_change, 0, 113 "log interface link state change events"); 114 115 /* Log promiscuous mode change events */ 116 static int log_promisc_mode_change = 1; 117 118 SYSCTL_INT(_net_link, OID_AUTO, log_promisc_mode_change, CTLFLAG_RDTUN, 119 &log_promisc_mode_change, 1, 120 "log promiscuous mode change events"); 121 122 /* Interface description */ 123 static unsigned int ifdescr_maxlen = 1024; 124 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW, 125 &ifdescr_maxlen, 0, 126 "administrative maximum length for interface description"); 127 128 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions"); 129 130 /* global sx for non-critical path ifdescr */ 131 static struct sx ifdescr_sx; 132 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr"); 133 134 void (*bridge_linkstate_p)(struct ifnet *ifp); 135 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state); 136 void (*lagg_linkstate_p)(struct ifnet *ifp, int state); 137 /* These are external hooks for CARP. */ 138 void (*carp_linkstate_p)(struct ifnet *ifp); 139 void (*carp_demote_adj_p)(int, char *); 140 int (*carp_master_p)(struct ifaddr *); 141 #if defined(INET) || defined(INET6) 142 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost); 143 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m, 144 const struct sockaddr *sa); 145 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *); 146 int (*carp_attach_p)(struct ifaddr *, int); 147 void (*carp_detach_p)(struct ifaddr *, bool); 148 #endif 149 #ifdef INET 150 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **); 151 #endif 152 #ifdef INET6 153 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6); 154 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m, 155 const struct in6_addr *taddr); 156 #endif 157 158 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL; 159 160 /* 161 * XXX: Style; these should be sorted alphabetically, and unprototyped 162 * static functions should be prototyped. Currently they are sorted by 163 * declaration order. 164 */ 165 static void if_attachdomain(void *); 166 static void if_attachdomain1(struct ifnet *); 167 static int ifconf(u_long, caddr_t); 168 static void if_freemulti(struct ifmultiaddr *); 169 static void if_grow(void); 170 static void if_input_default(struct ifnet *, struct mbuf *); 171 static int if_requestencap_default(struct ifnet *, struct if_encap_req *); 172 static void if_route(struct ifnet *, int flag, int fam); 173 static int if_setflag(struct ifnet *, int, int, int *, int); 174 static int if_transmit(struct ifnet *ifp, struct mbuf *m); 175 static void if_unroute(struct ifnet *, int flag, int fam); 176 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 177 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *); 178 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int); 179 static void do_link_state_change(void *, int); 180 static int if_getgroup(struct ifgroupreq *, struct ifnet *); 181 static int if_getgroupmembers(struct ifgroupreq *); 182 static void if_delgroups(struct ifnet *); 183 static void if_attach_internal(struct ifnet *, int, struct if_clone *); 184 static int if_detach_internal(struct ifnet *, int, struct if_clone **); 185 #ifdef VIMAGE 186 static void if_vmove(struct ifnet *, struct vnet *); 187 #endif 188 189 #ifdef INET6 190 /* 191 * XXX: declare here to avoid to include many inet6 related files.. 192 * should be more generalized? 193 */ 194 extern void nd6_setmtu(struct ifnet *); 195 #endif 196 197 /* ipsec helper hooks */ 198 VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]); 199 VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]); 200 201 VNET_DEFINE(int, if_index); 202 int ifqmaxlen = IFQ_MAXLEN; 203 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */ 204 VNET_DEFINE(struct ifgrouphead, ifg_head); 205 206 static VNET_DEFINE(int, if_indexlim) = 8; 207 208 /* Table of ifnet by index. */ 209 VNET_DEFINE(struct ifnet **, ifindex_table); 210 211 #define V_if_indexlim VNET(if_indexlim) 212 #define V_ifindex_table VNET(ifindex_table) 213 214 /* 215 * The global network interface list (V_ifnet) and related state (such as 216 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and 217 * an rwlock. Either may be acquired shared to stablize the list, but both 218 * must be acquired writable to modify the list. This model allows us to 219 * both stablize the interface list during interrupt thread processing, but 220 * also to stablize it over long-running ioctls, without introducing priority 221 * inversions and deadlocks. 222 */ 223 struct rwlock ifnet_rwlock; 224 RW_SYSINIT_FLAGS(ifnet_rw, &ifnet_rwlock, "ifnet_rw", RW_RECURSE); 225 struct sx ifnet_sxlock; 226 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE); 227 228 /* 229 * The allocation of network interfaces is a rather non-atomic affair; we 230 * need to select an index before we are ready to expose the interface for 231 * use, so will use this pointer value to indicate reservation. 232 */ 233 #define IFNET_HOLD (void *)(uintptr_t)(-1) 234 235 static if_com_alloc_t *if_com_alloc[256]; 236 static if_com_free_t *if_com_free[256]; 237 238 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals"); 239 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 240 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 241 242 struct ifnet * 243 ifnet_byindex_locked(u_short idx) 244 { 245 246 if (idx > V_if_index) 247 return (NULL); 248 if (V_ifindex_table[idx] == IFNET_HOLD) 249 return (NULL); 250 return (V_ifindex_table[idx]); 251 } 252 253 struct ifnet * 254 ifnet_byindex(u_short idx) 255 { 256 struct ifnet *ifp; 257 258 IFNET_RLOCK_NOSLEEP(); 259 ifp = ifnet_byindex_locked(idx); 260 IFNET_RUNLOCK_NOSLEEP(); 261 return (ifp); 262 } 263 264 struct ifnet * 265 ifnet_byindex_ref(u_short idx) 266 { 267 struct ifnet *ifp; 268 269 IFNET_RLOCK_NOSLEEP(); 270 ifp = ifnet_byindex_locked(idx); 271 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) { 272 IFNET_RUNLOCK_NOSLEEP(); 273 return (NULL); 274 } 275 if_ref(ifp); 276 IFNET_RUNLOCK_NOSLEEP(); 277 return (ifp); 278 } 279 280 /* 281 * Allocate an ifindex array entry; return 0 on success or an error on 282 * failure. 283 */ 284 static u_short 285 ifindex_alloc(void) 286 { 287 u_short idx; 288 289 IFNET_WLOCK_ASSERT(); 290 retry: 291 /* 292 * Try to find an empty slot below V_if_index. If we fail, take the 293 * next slot. 294 */ 295 for (idx = 1; idx <= V_if_index; idx++) { 296 if (V_ifindex_table[idx] == NULL) 297 break; 298 } 299 300 /* Catch if_index overflow. */ 301 if (idx >= V_if_indexlim) { 302 if_grow(); 303 goto retry; 304 } 305 if (idx > V_if_index) 306 V_if_index = idx; 307 return (idx); 308 } 309 310 static void 311 ifindex_free_locked(u_short idx) 312 { 313 314 IFNET_WLOCK_ASSERT(); 315 316 V_ifindex_table[idx] = NULL; 317 while (V_if_index > 0 && 318 V_ifindex_table[V_if_index] == NULL) 319 V_if_index--; 320 } 321 322 static void 323 ifindex_free(u_short idx) 324 { 325 326 IFNET_WLOCK(); 327 ifindex_free_locked(idx); 328 IFNET_WUNLOCK(); 329 } 330 331 static void 332 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp) 333 { 334 335 IFNET_WLOCK_ASSERT(); 336 337 V_ifindex_table[idx] = ifp; 338 } 339 340 static void 341 ifnet_setbyindex(u_short idx, struct ifnet *ifp) 342 { 343 344 IFNET_WLOCK(); 345 ifnet_setbyindex_locked(idx, ifp); 346 IFNET_WUNLOCK(); 347 } 348 349 struct ifaddr * 350 ifaddr_byindex(u_short idx) 351 { 352 struct ifnet *ifp; 353 struct ifaddr *ifa = NULL; 354 355 IFNET_RLOCK_NOSLEEP(); 356 ifp = ifnet_byindex_locked(idx); 357 if (ifp != NULL && (ifa = ifp->if_addr) != NULL) 358 ifa_ref(ifa); 359 IFNET_RUNLOCK_NOSLEEP(); 360 return (ifa); 361 } 362 363 /* 364 * Network interface utility routines. 365 * 366 * Routines with ifa_ifwith* names take sockaddr *'s as 367 * parameters. 368 */ 369 370 static void 371 vnet_if_init(const void *unused __unused) 372 { 373 374 TAILQ_INIT(&V_ifnet); 375 TAILQ_INIT(&V_ifg_head); 376 IFNET_WLOCK(); 377 if_grow(); /* create initial table */ 378 IFNET_WUNLOCK(); 379 vnet_if_clone_init(); 380 } 381 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init, 382 NULL); 383 384 #ifdef VIMAGE 385 static void 386 vnet_if_uninit(const void *unused __unused) 387 { 388 389 VNET_ASSERT(TAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p " 390 "not empty", __func__, __LINE__, &V_ifnet)); 391 VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p " 392 "not empty", __func__, __LINE__, &V_ifg_head)); 393 394 free((caddr_t)V_ifindex_table, M_IFNET); 395 } 396 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST, 397 vnet_if_uninit, NULL); 398 399 static void 400 vnet_if_return(const void *unused __unused) 401 { 402 struct ifnet *ifp, *nifp; 403 404 /* Return all inherited interfaces to their parent vnets. */ 405 TAILQ_FOREACH_SAFE(ifp, &V_ifnet, if_link, nifp) { 406 if (ifp->if_home_vnet != ifp->if_vnet) 407 if_vmove(ifp, ifp->if_home_vnet); 408 } 409 } 410 VNET_SYSUNINIT(vnet_if_return, SI_SUB_VNET_DONE, SI_ORDER_ANY, 411 vnet_if_return, NULL); 412 #endif 413 414 static void 415 if_grow(void) 416 { 417 int oldlim; 418 u_int n; 419 struct ifnet **e; 420 421 IFNET_WLOCK_ASSERT(); 422 oldlim = V_if_indexlim; 423 IFNET_WUNLOCK(); 424 n = (oldlim << 1) * sizeof(*e); 425 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO); 426 IFNET_WLOCK(); 427 if (V_if_indexlim != oldlim) { 428 free(e, M_IFNET); 429 return; 430 } 431 if (V_ifindex_table != NULL) { 432 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2); 433 free((caddr_t)V_ifindex_table, M_IFNET); 434 } 435 V_if_indexlim <<= 1; 436 V_ifindex_table = e; 437 } 438 439 /* 440 * Allocate a struct ifnet and an index for an interface. A layer 2 441 * common structure will also be allocated if an allocation routine is 442 * registered for the passed type. 443 */ 444 struct ifnet * 445 if_alloc(u_char type) 446 { 447 struct ifnet *ifp; 448 u_short idx; 449 450 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO); 451 IFNET_WLOCK(); 452 idx = ifindex_alloc(); 453 ifnet_setbyindex_locked(idx, IFNET_HOLD); 454 IFNET_WUNLOCK(); 455 ifp->if_index = idx; 456 ifp->if_type = type; 457 ifp->if_alloctype = type; 458 #ifdef VIMAGE 459 ifp->if_vnet = curvnet; 460 #endif 461 if (if_com_alloc[type] != NULL) { 462 ifp->if_l2com = if_com_alloc[type](type, ifp); 463 if (ifp->if_l2com == NULL) { 464 free(ifp, M_IFNET); 465 ifindex_free(idx); 466 return (NULL); 467 } 468 } 469 470 IF_ADDR_LOCK_INIT(ifp); 471 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp); 472 ifp->if_afdata_initialized = 0; 473 IF_AFDATA_LOCK_INIT(ifp); 474 TAILQ_INIT(&ifp->if_addrhead); 475 TAILQ_INIT(&ifp->if_multiaddrs); 476 TAILQ_INIT(&ifp->if_groups); 477 #ifdef MAC 478 mac_ifnet_init(ifp); 479 #endif 480 ifq_init(&ifp->if_snd, ifp); 481 482 refcount_init(&ifp->if_refcount, 1); /* Index reference. */ 483 for (int i = 0; i < IFCOUNTERS; i++) 484 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK); 485 ifp->if_get_counter = if_get_counter_default; 486 ifnet_setbyindex(ifp->if_index, ifp); 487 return (ifp); 488 } 489 490 /* 491 * Do the actual work of freeing a struct ifnet, and layer 2 common 492 * structure. This call is made when the last reference to an 493 * interface is released. 494 */ 495 static void 496 if_free_internal(struct ifnet *ifp) 497 { 498 499 KASSERT((ifp->if_flags & IFF_DYING), 500 ("if_free_internal: interface not dying")); 501 502 if (if_com_free[ifp->if_alloctype] != NULL) 503 if_com_free[ifp->if_alloctype](ifp->if_l2com, 504 ifp->if_alloctype); 505 506 #ifdef MAC 507 mac_ifnet_destroy(ifp); 508 #endif /* MAC */ 509 if (ifp->if_description != NULL) 510 free(ifp->if_description, M_IFDESCR); 511 IF_AFDATA_DESTROY(ifp); 512 IF_ADDR_LOCK_DESTROY(ifp); 513 ifq_delete(&ifp->if_snd); 514 515 for (int i = 0; i < IFCOUNTERS; i++) 516 counter_u64_free(ifp->if_counters[i]); 517 518 free(ifp, M_IFNET); 519 } 520 521 /* 522 * Deregister an interface and free the associated storage. 523 */ 524 void 525 if_free(struct ifnet *ifp) 526 { 527 528 ifp->if_flags |= IFF_DYING; /* XXX: Locking */ 529 530 CURVNET_SET_QUIET(ifp->if_vnet); 531 IFNET_WLOCK(); 532 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index), 533 ("%s: freeing unallocated ifnet", ifp->if_xname)); 534 535 ifindex_free_locked(ifp->if_index); 536 IFNET_WUNLOCK(); 537 538 if (refcount_release(&ifp->if_refcount)) 539 if_free_internal(ifp); 540 CURVNET_RESTORE(); 541 } 542 543 /* 544 * Interfaces to keep an ifnet type-stable despite the possibility of the 545 * driver calling if_free(). If there are additional references, we defer 546 * freeing the underlying data structure. 547 */ 548 void 549 if_ref(struct ifnet *ifp) 550 { 551 552 /* We don't assert the ifnet list lock here, but arguably should. */ 553 refcount_acquire(&ifp->if_refcount); 554 } 555 556 void 557 if_rele(struct ifnet *ifp) 558 { 559 560 if (!refcount_release(&ifp->if_refcount)) 561 return; 562 if_free_internal(ifp); 563 } 564 565 void 566 ifq_init(struct ifaltq *ifq, struct ifnet *ifp) 567 { 568 569 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF); 570 571 if (ifq->ifq_maxlen == 0) 572 ifq->ifq_maxlen = ifqmaxlen; 573 574 ifq->altq_type = 0; 575 ifq->altq_disc = NULL; 576 ifq->altq_flags &= ALTQF_CANTCHANGE; 577 ifq->altq_tbr = NULL; 578 ifq->altq_ifp = ifp; 579 } 580 581 void 582 ifq_delete(struct ifaltq *ifq) 583 { 584 mtx_destroy(&ifq->ifq_mtx); 585 } 586 587 /* 588 * Perform generic interface initialization tasks and attach the interface 589 * to the list of "active" interfaces. If vmove flag is set on entry 590 * to if_attach_internal(), perform only a limited subset of initialization 591 * tasks, given that we are moving from one vnet to another an ifnet which 592 * has already been fully initialized. 593 * 594 * Note that if_detach_internal() removes group membership unconditionally 595 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL. 596 * Thus, when if_vmove() is applied to a cloned interface, group membership 597 * is lost while a cloned one always joins a group whose name is 598 * ifc->ifc_name. To recover this after if_detach_internal() and 599 * if_attach_internal(), the cloner should be specified to 600 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal() 601 * attempts to join a group whose name is ifc->ifc_name. 602 * 603 * XXX: 604 * - The decision to return void and thus require this function to 605 * succeed is questionable. 606 * - We should probably do more sanity checking. For instance we don't 607 * do anything to insure if_xname is unique or non-empty. 608 */ 609 void 610 if_attach(struct ifnet *ifp) 611 { 612 613 if_attach_internal(ifp, 0, NULL); 614 } 615 616 /* 617 * Compute the least common TSO limit. 618 */ 619 void 620 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax) 621 { 622 /* 623 * 1) If there is no limit currently, take the limit from 624 * the network adapter. 625 * 626 * 2) If the network adapter has a limit below the current 627 * limit, apply it. 628 */ 629 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 && 630 ifp->if_hw_tsomax < pmax->tsomaxbytes)) { 631 pmax->tsomaxbytes = ifp->if_hw_tsomax; 632 } 633 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 && 634 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) { 635 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount; 636 } 637 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 && 638 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) { 639 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize; 640 } 641 } 642 643 /* 644 * Update TSO limit of a network adapter. 645 * 646 * Returns zero if no change. Else non-zero. 647 */ 648 int 649 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax) 650 { 651 int retval = 0; 652 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) { 653 ifp->if_hw_tsomax = pmax->tsomaxbytes; 654 retval++; 655 } 656 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) { 657 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize; 658 retval++; 659 } 660 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) { 661 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount; 662 retval++; 663 } 664 return (retval); 665 } 666 667 static void 668 if_attach_internal(struct ifnet *ifp, int vmove, struct if_clone *ifc) 669 { 670 unsigned socksize, ifasize; 671 int namelen, masklen; 672 struct sockaddr_dl *sdl; 673 struct ifaddr *ifa; 674 675 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index)) 676 panic ("%s: BUG: if_attach called without if_alloc'd input()\n", 677 ifp->if_xname); 678 679 #ifdef VIMAGE 680 ifp->if_vnet = curvnet; 681 if (ifp->if_home_vnet == NULL) 682 ifp->if_home_vnet = curvnet; 683 #endif 684 685 if_addgroup(ifp, IFG_ALL); 686 687 /* Restore group membership for cloned interfaces. */ 688 if (vmove && ifc != NULL) 689 if_clone_addgroup(ifp, ifc); 690 691 getmicrotime(&ifp->if_lastchange); 692 ifp->if_epoch = time_uptime; 693 694 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) || 695 (ifp->if_transmit != NULL && ifp->if_qflush != NULL), 696 ("transmit and qflush must both either be set or both be NULL")); 697 if (ifp->if_transmit == NULL) { 698 ifp->if_transmit = if_transmit; 699 ifp->if_qflush = if_qflush; 700 } 701 if (ifp->if_input == NULL) 702 ifp->if_input = if_input_default; 703 704 if (ifp->if_requestencap == NULL) 705 ifp->if_requestencap = if_requestencap_default; 706 707 if (!vmove) { 708 #ifdef MAC 709 mac_ifnet_create(ifp); 710 #endif 711 712 /* 713 * Create a Link Level name for this device. 714 */ 715 namelen = strlen(ifp->if_xname); 716 /* 717 * Always save enough space for any possiable name so we 718 * can do a rename in place later. 719 */ 720 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ; 721 socksize = masklen + ifp->if_addrlen; 722 if (socksize < sizeof(*sdl)) 723 socksize = sizeof(*sdl); 724 socksize = roundup2(socksize, sizeof(long)); 725 ifasize = sizeof(*ifa) + 2 * socksize; 726 ifa = ifa_alloc(ifasize, M_WAITOK); 727 sdl = (struct sockaddr_dl *)(ifa + 1); 728 sdl->sdl_len = socksize; 729 sdl->sdl_family = AF_LINK; 730 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 731 sdl->sdl_nlen = namelen; 732 sdl->sdl_index = ifp->if_index; 733 sdl->sdl_type = ifp->if_type; 734 ifp->if_addr = ifa; 735 ifa->ifa_ifp = ifp; 736 ifa->ifa_rtrequest = link_rtrequest; 737 ifa->ifa_addr = (struct sockaddr *)sdl; 738 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 739 ifa->ifa_netmask = (struct sockaddr *)sdl; 740 sdl->sdl_len = masklen; 741 while (namelen != 0) 742 sdl->sdl_data[--namelen] = 0xff; 743 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link); 744 /* Reliably crash if used uninitialized. */ 745 ifp->if_broadcastaddr = NULL; 746 747 #if defined(INET) || defined(INET6) 748 /* Use defaults for TSO, if nothing is set */ 749 if (ifp->if_hw_tsomax == 0 && 750 ifp->if_hw_tsomaxsegcount == 0 && 751 ifp->if_hw_tsomaxsegsize == 0) { 752 /* 753 * The TSO defaults needs to be such that an 754 * NFS mbuf list of 35 mbufs totalling just 755 * below 64K works and that a chain of mbufs 756 * can be defragged into at most 32 segments: 757 */ 758 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) - 759 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN)); 760 ifp->if_hw_tsomaxsegcount = 35; 761 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */ 762 763 /* XXX some drivers set IFCAP_TSO after ethernet attach */ 764 if (ifp->if_capabilities & IFCAP_TSO) { 765 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n", 766 ifp->if_hw_tsomax, 767 ifp->if_hw_tsomaxsegcount, 768 ifp->if_hw_tsomaxsegsize); 769 } 770 } 771 #endif 772 } 773 #ifdef VIMAGE 774 else { 775 /* 776 * Update the interface index in the link layer address 777 * of the interface. 778 */ 779 for (ifa = ifp->if_addr; ifa != NULL; 780 ifa = TAILQ_NEXT(ifa, ifa_link)) { 781 if (ifa->ifa_addr->sa_family == AF_LINK) { 782 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 783 sdl->sdl_index = ifp->if_index; 784 } 785 } 786 } 787 #endif 788 789 IFNET_WLOCK(); 790 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link); 791 #ifdef VIMAGE 792 curvnet->vnet_ifcnt++; 793 #endif 794 IFNET_WUNLOCK(); 795 796 if (domain_init_status >= 2) 797 if_attachdomain1(ifp); 798 799 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 800 if (IS_DEFAULT_VNET(curvnet)) 801 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 802 803 /* Announce the interface. */ 804 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 805 } 806 807 static void 808 if_attachdomain(void *dummy) 809 { 810 struct ifnet *ifp; 811 812 TAILQ_FOREACH(ifp, &V_ifnet, if_link) 813 if_attachdomain1(ifp); 814 } 815 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND, 816 if_attachdomain, NULL); 817 818 static void 819 if_attachdomain1(struct ifnet *ifp) 820 { 821 struct domain *dp; 822 823 /* 824 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we 825 * cannot lock ifp->if_afdata initialization, entirely. 826 */ 827 IF_AFDATA_LOCK(ifp); 828 if (ifp->if_afdata_initialized >= domain_init_status) { 829 IF_AFDATA_UNLOCK(ifp); 830 log(LOG_WARNING, "%s called more than once on %s\n", 831 __func__, ifp->if_xname); 832 return; 833 } 834 ifp->if_afdata_initialized = domain_init_status; 835 IF_AFDATA_UNLOCK(ifp); 836 837 /* address family dependent data region */ 838 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 839 for (dp = domains; dp; dp = dp->dom_next) { 840 if (dp->dom_ifattach) 841 ifp->if_afdata[dp->dom_family] = 842 (*dp->dom_ifattach)(ifp); 843 } 844 } 845 846 /* 847 * Remove any unicast or broadcast network addresses from an interface. 848 */ 849 void 850 if_purgeaddrs(struct ifnet *ifp) 851 { 852 struct ifaddr *ifa, *next; 853 854 /* XXX cannot hold IF_ADDR_WLOCK over called functions. */ 855 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) { 856 if (ifa->ifa_addr->sa_family == AF_LINK) 857 continue; 858 #ifdef INET 859 /* XXX: Ugly!! ad hoc just for INET */ 860 if (ifa->ifa_addr->sa_family == AF_INET) { 861 struct ifaliasreq ifr; 862 863 bzero(&ifr, sizeof(ifr)); 864 ifr.ifra_addr = *ifa->ifa_addr; 865 if (ifa->ifa_dstaddr) 866 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 867 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 868 NULL) == 0) 869 continue; 870 } 871 #endif /* INET */ 872 #ifdef INET6 873 if (ifa->ifa_addr->sa_family == AF_INET6) { 874 in6_purgeaddr(ifa); 875 /* ifp_addrhead is already updated */ 876 continue; 877 } 878 #endif /* INET6 */ 879 IF_ADDR_WLOCK(ifp); 880 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 881 IF_ADDR_WUNLOCK(ifp); 882 ifa_free(ifa); 883 } 884 } 885 886 /* 887 * Remove any multicast network addresses from an interface when an ifnet 888 * is going away. 889 */ 890 static void 891 if_purgemaddrs(struct ifnet *ifp) 892 { 893 struct ifmultiaddr *ifma; 894 struct ifmultiaddr *next; 895 896 IF_ADDR_WLOCK(ifp); 897 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 898 if_delmulti_locked(ifp, ifma, 1); 899 IF_ADDR_WUNLOCK(ifp); 900 } 901 902 /* 903 * Detach an interface, removing it from the list of "active" interfaces. 904 * If vmove flag is set on entry to if_detach_internal(), perform only a 905 * limited subset of cleanup tasks, given that we are moving an ifnet from 906 * one vnet to another, where it must be fully operational. 907 * 908 * XXXRW: There are some significant questions about event ordering, and 909 * how to prevent things from starting to use the interface during detach. 910 */ 911 void 912 if_detach(struct ifnet *ifp) 913 { 914 915 CURVNET_SET_QUIET(ifp->if_vnet); 916 if_detach_internal(ifp, 0, NULL); 917 CURVNET_RESTORE(); 918 } 919 920 /* 921 * The vmove flag, if set, indicates that we are called from a callpath 922 * that is moving an interface to a different vnet instance. 923 * 924 * The shutdown flag, if set, indicates that we are called in the 925 * process of shutting down a vnet instance. Currently only the 926 * vnet_if_return SYSUNINIT function sets it. Note: we can be called 927 * on a vnet instance shutdown without this flag being set, e.g., when 928 * the cloned interfaces are destoyed as first thing of teardown. 929 */ 930 static int 931 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp) 932 { 933 struct ifaddr *ifa; 934 int i; 935 struct domain *dp; 936 struct ifnet *iter; 937 int found = 0; 938 #ifdef VIMAGE 939 int shutdown; 940 941 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET && 942 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0; 943 #endif 944 IFNET_WLOCK(); 945 TAILQ_FOREACH(iter, &V_ifnet, if_link) 946 if (iter == ifp) { 947 TAILQ_REMOVE(&V_ifnet, ifp, if_link); 948 found = 1; 949 break; 950 } 951 IFNET_WUNLOCK(); 952 if (!found) { 953 /* 954 * While we would want to panic here, we cannot 955 * guarantee that the interface is indeed still on 956 * the list given we don't hold locks all the way. 957 */ 958 return (ENOENT); 959 #if 0 960 if (vmove) 961 panic("%s: ifp=%p not on the ifnet tailq %p", 962 __func__, ifp, &V_ifnet); 963 else 964 return; /* XXX this should panic as well? */ 965 #endif 966 } 967 968 /* 969 * At this point we know the interface still was on the ifnet list 970 * and we removed it so we are in a stable state. 971 */ 972 #ifdef VIMAGE 973 curvnet->vnet_ifcnt--; 974 #endif 975 976 /* 977 * In any case (destroy or vmove) detach us from the groups 978 * and remove/wait for pending events on the taskq. 979 * XXX-BZ in theory an interface could still enqueue a taskq change? 980 */ 981 if_delgroups(ifp); 982 983 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 984 985 /* 986 * Check if this is a cloned interface or not. Must do even if 987 * shutting down as a if_vmove_reclaim() would move the ifp and 988 * the if_clone_addgroup() will have a corrupted string overwise 989 * from a gibberish pointer. 990 */ 991 if (vmove && ifcp != NULL) 992 *ifcp = if_clone_findifc(ifp); 993 994 if_down(ifp); 995 996 #ifdef VIMAGE 997 /* 998 * On VNET shutdown abort here as the stack teardown will do all 999 * the work top-down for us. 1000 */ 1001 if (shutdown) { 1002 /* 1003 * In case of a vmove we are done here without error. 1004 * If we would signal an error it would lead to the same 1005 * abort as if we did not find the ifnet anymore. 1006 * if_detach() calls us in void context and does not care 1007 * about an early abort notification, so life is splendid :) 1008 */ 1009 goto finish_vnet_shutdown; 1010 } 1011 #endif 1012 1013 /* 1014 * At this point we are not tearing down a VNET and are either 1015 * going to destroy or vmove the interface and have to cleanup 1016 * accordingly. 1017 */ 1018 1019 /* 1020 * Remove routes and flush queues. 1021 */ 1022 #ifdef ALTQ 1023 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 1024 altq_disable(&ifp->if_snd); 1025 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 1026 altq_detach(&ifp->if_snd); 1027 #endif 1028 1029 if_purgeaddrs(ifp); 1030 1031 #ifdef INET 1032 in_ifdetach(ifp); 1033 #endif 1034 1035 #ifdef INET6 1036 /* 1037 * Remove all IPv6 kernel structs related to ifp. This should be done 1038 * before removing routing entries below, since IPv6 interface direct 1039 * routes are expected to be removed by the IPv6-specific kernel API. 1040 * Otherwise, the kernel will detect some inconsistency and bark it. 1041 */ 1042 in6_ifdetach(ifp); 1043 #endif 1044 if_purgemaddrs(ifp); 1045 1046 /* Announce that the interface is gone. */ 1047 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 1048 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 1049 if (IS_DEFAULT_VNET(curvnet)) 1050 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 1051 1052 if (!vmove) { 1053 /* 1054 * Prevent further calls into the device driver via ifnet. 1055 */ 1056 if_dead(ifp); 1057 1058 /* 1059 * Remove link ifaddr pointer and maybe decrement if_index. 1060 * Clean up all addresses. 1061 */ 1062 ifp->if_addr = NULL; 1063 1064 /* We can now free link ifaddr. */ 1065 IF_ADDR_WLOCK(ifp); 1066 if (!TAILQ_EMPTY(&ifp->if_addrhead)) { 1067 ifa = TAILQ_FIRST(&ifp->if_addrhead); 1068 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 1069 IF_ADDR_WUNLOCK(ifp); 1070 ifa_free(ifa); 1071 } else 1072 IF_ADDR_WUNLOCK(ifp); 1073 } 1074 1075 rt_flushifroutes(ifp); 1076 1077 #ifdef VIMAGE 1078 finish_vnet_shutdown: 1079 #endif 1080 /* 1081 * We cannot hold the lock over dom_ifdetach calls as they might 1082 * sleep, for example trying to drain a callout, thus open up the 1083 * theoretical race with re-attaching. 1084 */ 1085 IF_AFDATA_LOCK(ifp); 1086 i = ifp->if_afdata_initialized; 1087 ifp->if_afdata_initialized = 0; 1088 IF_AFDATA_UNLOCK(ifp); 1089 for (dp = domains; i > 0 && dp; dp = dp->dom_next) { 1090 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) { 1091 (*dp->dom_ifdetach)(ifp, 1092 ifp->if_afdata[dp->dom_family]); 1093 ifp->if_afdata[dp->dom_family] = NULL; 1094 } 1095 } 1096 1097 return (0); 1098 } 1099 1100 #ifdef VIMAGE 1101 /* 1102 * if_vmove() performs a limited version of if_detach() in current 1103 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg. 1104 * An attempt is made to shrink if_index in current vnet, find an 1105 * unused if_index in target vnet and calls if_grow() if necessary, 1106 * and finally find an unused if_xname for the target vnet. 1107 */ 1108 static void 1109 if_vmove(struct ifnet *ifp, struct vnet *new_vnet) 1110 { 1111 struct if_clone *ifc; 1112 u_int bif_dlt, bif_hdrlen; 1113 int rc; 1114 1115 /* 1116 * if_detach_internal() will call the eventhandler to notify 1117 * interface departure. That will detach if_bpf. We need to 1118 * safe the dlt and hdrlen so we can re-attach it later. 1119 */ 1120 bpf_get_bp_params(ifp->if_bpf, &bif_dlt, &bif_hdrlen); 1121 1122 /* 1123 * Detach from current vnet, but preserve LLADDR info, do not 1124 * mark as dead etc. so that the ifnet can be reattached later. 1125 * If we cannot find it, we lost the race to someone else. 1126 */ 1127 rc = if_detach_internal(ifp, 1, &ifc); 1128 if (rc != 0) 1129 return; 1130 1131 /* 1132 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink 1133 * the if_index for that vnet if possible. 1134 * 1135 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized, 1136 * or we'd lock on one vnet and unlock on another. 1137 */ 1138 IFNET_WLOCK(); 1139 ifindex_free_locked(ifp->if_index); 1140 IFNET_WUNLOCK(); 1141 1142 /* 1143 * Perform interface-specific reassignment tasks, if provided by 1144 * the driver. 1145 */ 1146 if (ifp->if_reassign != NULL) 1147 ifp->if_reassign(ifp, new_vnet, NULL); 1148 1149 /* 1150 * Switch to the context of the target vnet. 1151 */ 1152 CURVNET_SET_QUIET(new_vnet); 1153 1154 IFNET_WLOCK(); 1155 ifp->if_index = ifindex_alloc(); 1156 ifnet_setbyindex_locked(ifp->if_index, ifp); 1157 IFNET_WUNLOCK(); 1158 1159 if_attach_internal(ifp, 1, ifc); 1160 1161 if (ifp->if_bpf == NULL) 1162 bpfattach(ifp, bif_dlt, bif_hdrlen); 1163 1164 CURVNET_RESTORE(); 1165 } 1166 1167 /* 1168 * Move an ifnet to or from another child prison/vnet, specified by the jail id. 1169 */ 1170 static int 1171 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid) 1172 { 1173 struct prison *pr; 1174 struct ifnet *difp; 1175 int shutdown; 1176 1177 /* Try to find the prison within our visibility. */ 1178 sx_slock(&allprison_lock); 1179 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1180 sx_sunlock(&allprison_lock); 1181 if (pr == NULL) 1182 return (ENXIO); 1183 prison_hold_locked(pr); 1184 mtx_unlock(&pr->pr_mtx); 1185 1186 /* Do not try to move the iface from and to the same prison. */ 1187 if (pr->pr_vnet == ifp->if_vnet) { 1188 prison_free(pr); 1189 return (EEXIST); 1190 } 1191 1192 /* Make sure the named iface does not exists in the dst. prison/vnet. */ 1193 /* XXX Lock interfaces to avoid races. */ 1194 CURVNET_SET_QUIET(pr->pr_vnet); 1195 difp = ifunit(ifname); 1196 if (difp != NULL) { 1197 CURVNET_RESTORE(); 1198 prison_free(pr); 1199 return (EEXIST); 1200 } 1201 1202 /* Make sure the VNET is stable. */ 1203 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET && 1204 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0; 1205 if (shutdown) { 1206 CURVNET_RESTORE(); 1207 prison_free(pr); 1208 return (EBUSY); 1209 } 1210 CURVNET_RESTORE(); 1211 1212 /* Move the interface into the child jail/vnet. */ 1213 if_vmove(ifp, pr->pr_vnet); 1214 1215 /* Report the new if_xname back to the userland. */ 1216 sprintf(ifname, "%s", ifp->if_xname); 1217 1218 prison_free(pr); 1219 return (0); 1220 } 1221 1222 static int 1223 if_vmove_reclaim(struct thread *td, char *ifname, int jid) 1224 { 1225 struct prison *pr; 1226 struct vnet *vnet_dst; 1227 struct ifnet *ifp; 1228 int shutdown; 1229 1230 /* Try to find the prison within our visibility. */ 1231 sx_slock(&allprison_lock); 1232 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1233 sx_sunlock(&allprison_lock); 1234 if (pr == NULL) 1235 return (ENXIO); 1236 prison_hold_locked(pr); 1237 mtx_unlock(&pr->pr_mtx); 1238 1239 /* Make sure the named iface exists in the source prison/vnet. */ 1240 CURVNET_SET(pr->pr_vnet); 1241 ifp = ifunit(ifname); /* XXX Lock to avoid races. */ 1242 if (ifp == NULL) { 1243 CURVNET_RESTORE(); 1244 prison_free(pr); 1245 return (ENXIO); 1246 } 1247 1248 /* Do not try to move the iface from and to the same prison. */ 1249 vnet_dst = TD_TO_VNET(td); 1250 if (vnet_dst == ifp->if_vnet) { 1251 CURVNET_RESTORE(); 1252 prison_free(pr); 1253 return (EEXIST); 1254 } 1255 1256 /* Make sure the VNET is stable. */ 1257 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET && 1258 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0; 1259 if (shutdown) { 1260 CURVNET_RESTORE(); 1261 prison_free(pr); 1262 return (EBUSY); 1263 } 1264 1265 /* Get interface back from child jail/vnet. */ 1266 if_vmove(ifp, vnet_dst); 1267 CURVNET_RESTORE(); 1268 1269 /* Report the new if_xname back to the userland. */ 1270 sprintf(ifname, "%s", ifp->if_xname); 1271 1272 prison_free(pr); 1273 return (0); 1274 } 1275 #endif /* VIMAGE */ 1276 1277 /* 1278 * Add a group to an interface 1279 */ 1280 int 1281 if_addgroup(struct ifnet *ifp, const char *groupname) 1282 { 1283 struct ifg_list *ifgl; 1284 struct ifg_group *ifg = NULL; 1285 struct ifg_member *ifgm; 1286 int new = 0; 1287 1288 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 1289 groupname[strlen(groupname) - 1] <= '9') 1290 return (EINVAL); 1291 1292 IFNET_WLOCK(); 1293 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1294 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) { 1295 IFNET_WUNLOCK(); 1296 return (EEXIST); 1297 } 1298 1299 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP, 1300 M_NOWAIT)) == NULL) { 1301 IFNET_WUNLOCK(); 1302 return (ENOMEM); 1303 } 1304 1305 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member), 1306 M_TEMP, M_NOWAIT)) == NULL) { 1307 free(ifgl, M_TEMP); 1308 IFNET_WUNLOCK(); 1309 return (ENOMEM); 1310 } 1311 1312 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1313 if (!strcmp(ifg->ifg_group, groupname)) 1314 break; 1315 1316 if (ifg == NULL) { 1317 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group), 1318 M_TEMP, M_NOWAIT)) == NULL) { 1319 free(ifgl, M_TEMP); 1320 free(ifgm, M_TEMP); 1321 IFNET_WUNLOCK(); 1322 return (ENOMEM); 1323 } 1324 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 1325 ifg->ifg_refcnt = 0; 1326 TAILQ_INIT(&ifg->ifg_members); 1327 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next); 1328 new = 1; 1329 } 1330 1331 ifg->ifg_refcnt++; 1332 ifgl->ifgl_group = ifg; 1333 ifgm->ifgm_ifp = ifp; 1334 1335 IF_ADDR_WLOCK(ifp); 1336 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 1337 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 1338 IF_ADDR_WUNLOCK(ifp); 1339 1340 IFNET_WUNLOCK(); 1341 1342 if (new) 1343 EVENTHANDLER_INVOKE(group_attach_event, ifg); 1344 EVENTHANDLER_INVOKE(group_change_event, groupname); 1345 1346 return (0); 1347 } 1348 1349 /* 1350 * Remove a group from an interface 1351 */ 1352 int 1353 if_delgroup(struct ifnet *ifp, const char *groupname) 1354 { 1355 struct ifg_list *ifgl; 1356 struct ifg_member *ifgm; 1357 1358 IFNET_WLOCK(); 1359 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1360 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1361 break; 1362 if (ifgl == NULL) { 1363 IFNET_WUNLOCK(); 1364 return (ENOENT); 1365 } 1366 1367 IF_ADDR_WLOCK(ifp); 1368 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1369 IF_ADDR_WUNLOCK(ifp); 1370 1371 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1372 if (ifgm->ifgm_ifp == ifp) 1373 break; 1374 1375 if (ifgm != NULL) { 1376 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 1377 free(ifgm, M_TEMP); 1378 } 1379 1380 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1381 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1382 IFNET_WUNLOCK(); 1383 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group); 1384 free(ifgl->ifgl_group, M_TEMP); 1385 } else 1386 IFNET_WUNLOCK(); 1387 1388 free(ifgl, M_TEMP); 1389 1390 EVENTHANDLER_INVOKE(group_change_event, groupname); 1391 1392 return (0); 1393 } 1394 1395 /* 1396 * Remove an interface from all groups 1397 */ 1398 static void 1399 if_delgroups(struct ifnet *ifp) 1400 { 1401 struct ifg_list *ifgl; 1402 struct ifg_member *ifgm; 1403 char groupname[IFNAMSIZ]; 1404 1405 IFNET_WLOCK(); 1406 while (!TAILQ_EMPTY(&ifp->if_groups)) { 1407 ifgl = TAILQ_FIRST(&ifp->if_groups); 1408 1409 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ); 1410 1411 IF_ADDR_WLOCK(ifp); 1412 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1413 IF_ADDR_WUNLOCK(ifp); 1414 1415 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1416 if (ifgm->ifgm_ifp == ifp) 1417 break; 1418 1419 if (ifgm != NULL) { 1420 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, 1421 ifgm_next); 1422 free(ifgm, M_TEMP); 1423 } 1424 1425 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1426 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1427 IFNET_WUNLOCK(); 1428 EVENTHANDLER_INVOKE(group_detach_event, 1429 ifgl->ifgl_group); 1430 free(ifgl->ifgl_group, M_TEMP); 1431 } else 1432 IFNET_WUNLOCK(); 1433 1434 free(ifgl, M_TEMP); 1435 1436 EVENTHANDLER_INVOKE(group_change_event, groupname); 1437 1438 IFNET_WLOCK(); 1439 } 1440 IFNET_WUNLOCK(); 1441 } 1442 1443 /* 1444 * Stores all groups from an interface in memory pointed 1445 * to by data 1446 */ 1447 static int 1448 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp) 1449 { 1450 int len, error; 1451 struct ifg_list *ifgl; 1452 struct ifg_req ifgrq, *ifgp; 1453 struct ifgroupreq *ifgr = data; 1454 1455 if (ifgr->ifgr_len == 0) { 1456 IF_ADDR_RLOCK(ifp); 1457 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1458 ifgr->ifgr_len += sizeof(struct ifg_req); 1459 IF_ADDR_RUNLOCK(ifp); 1460 return (0); 1461 } 1462 1463 len = ifgr->ifgr_len; 1464 ifgp = ifgr->ifgr_groups; 1465 /* XXX: wire */ 1466 IF_ADDR_RLOCK(ifp); 1467 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 1468 if (len < sizeof(ifgrq)) { 1469 IF_ADDR_RUNLOCK(ifp); 1470 return (EINVAL); 1471 } 1472 bzero(&ifgrq, sizeof ifgrq); 1473 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 1474 sizeof(ifgrq.ifgrq_group)); 1475 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1476 IF_ADDR_RUNLOCK(ifp); 1477 return (error); 1478 } 1479 len -= sizeof(ifgrq); 1480 ifgp++; 1481 } 1482 IF_ADDR_RUNLOCK(ifp); 1483 1484 return (0); 1485 } 1486 1487 /* 1488 * Stores all members of a group in memory pointed to by data 1489 */ 1490 static int 1491 if_getgroupmembers(struct ifgroupreq *data) 1492 { 1493 struct ifgroupreq *ifgr = data; 1494 struct ifg_group *ifg; 1495 struct ifg_member *ifgm; 1496 struct ifg_req ifgrq, *ifgp; 1497 int len, error; 1498 1499 IFNET_RLOCK(); 1500 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1501 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 1502 break; 1503 if (ifg == NULL) { 1504 IFNET_RUNLOCK(); 1505 return (ENOENT); 1506 } 1507 1508 if (ifgr->ifgr_len == 0) { 1509 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1510 ifgr->ifgr_len += sizeof(ifgrq); 1511 IFNET_RUNLOCK(); 1512 return (0); 1513 } 1514 1515 len = ifgr->ifgr_len; 1516 ifgp = ifgr->ifgr_groups; 1517 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1518 if (len < sizeof(ifgrq)) { 1519 IFNET_RUNLOCK(); 1520 return (EINVAL); 1521 } 1522 bzero(&ifgrq, sizeof ifgrq); 1523 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1524 sizeof(ifgrq.ifgrq_member)); 1525 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1526 IFNET_RUNLOCK(); 1527 return (error); 1528 } 1529 len -= sizeof(ifgrq); 1530 ifgp++; 1531 } 1532 IFNET_RUNLOCK(); 1533 1534 return (0); 1535 } 1536 1537 /* 1538 * Return counter values from counter(9)s stored in ifnet. 1539 */ 1540 uint64_t 1541 if_get_counter_default(struct ifnet *ifp, ift_counter cnt) 1542 { 1543 1544 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1545 1546 return (counter_u64_fetch(ifp->if_counters[cnt])); 1547 } 1548 1549 /* 1550 * Increase an ifnet counter. Usually used for counters shared 1551 * between the stack and a driver, but function supports them all. 1552 */ 1553 void 1554 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc) 1555 { 1556 1557 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1558 1559 counter_u64_add(ifp->if_counters[cnt], inc); 1560 } 1561 1562 /* 1563 * Copy data from ifnet to userland API structure if_data. 1564 */ 1565 void 1566 if_data_copy(struct ifnet *ifp, struct if_data *ifd) 1567 { 1568 1569 ifd->ifi_type = ifp->if_type; 1570 ifd->ifi_physical = 0; 1571 ifd->ifi_addrlen = ifp->if_addrlen; 1572 ifd->ifi_hdrlen = ifp->if_hdrlen; 1573 ifd->ifi_link_state = ifp->if_link_state; 1574 ifd->ifi_vhid = 0; 1575 ifd->ifi_datalen = sizeof(struct if_data); 1576 ifd->ifi_mtu = ifp->if_mtu; 1577 ifd->ifi_metric = ifp->if_metric; 1578 ifd->ifi_baudrate = ifp->if_baudrate; 1579 ifd->ifi_hwassist = ifp->if_hwassist; 1580 ifd->ifi_epoch = ifp->if_epoch; 1581 ifd->ifi_lastchange = ifp->if_lastchange; 1582 1583 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS); 1584 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS); 1585 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS); 1586 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS); 1587 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS); 1588 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES); 1589 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES); 1590 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS); 1591 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS); 1592 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS); 1593 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS); 1594 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO); 1595 } 1596 1597 /* 1598 * Wrapper functions for struct ifnet address list locking macros. These are 1599 * used by kernel modules to avoid encoding programming interface or binary 1600 * interface assumptions that may be violated when kernel-internal locking 1601 * approaches change. 1602 */ 1603 void 1604 if_addr_rlock(struct ifnet *ifp) 1605 { 1606 1607 IF_ADDR_RLOCK(ifp); 1608 } 1609 1610 void 1611 if_addr_runlock(struct ifnet *ifp) 1612 { 1613 1614 IF_ADDR_RUNLOCK(ifp); 1615 } 1616 1617 void 1618 if_maddr_rlock(if_t ifp) 1619 { 1620 1621 IF_ADDR_RLOCK((struct ifnet *)ifp); 1622 } 1623 1624 void 1625 if_maddr_runlock(if_t ifp) 1626 { 1627 1628 IF_ADDR_RUNLOCK((struct ifnet *)ifp); 1629 } 1630 1631 /* 1632 * Initialization, destruction and refcounting functions for ifaddrs. 1633 */ 1634 struct ifaddr * 1635 ifa_alloc(size_t size, int flags) 1636 { 1637 struct ifaddr *ifa; 1638 1639 KASSERT(size >= sizeof(struct ifaddr), 1640 ("%s: invalid size %zu", __func__, size)); 1641 1642 ifa = malloc(size, M_IFADDR, M_ZERO | flags); 1643 if (ifa == NULL) 1644 return (NULL); 1645 1646 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL) 1647 goto fail; 1648 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL) 1649 goto fail; 1650 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL) 1651 goto fail; 1652 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL) 1653 goto fail; 1654 1655 refcount_init(&ifa->ifa_refcnt, 1); 1656 1657 return (ifa); 1658 1659 fail: 1660 /* free(NULL) is okay */ 1661 counter_u64_free(ifa->ifa_opackets); 1662 counter_u64_free(ifa->ifa_ipackets); 1663 counter_u64_free(ifa->ifa_obytes); 1664 counter_u64_free(ifa->ifa_ibytes); 1665 free(ifa, M_IFADDR); 1666 1667 return (NULL); 1668 } 1669 1670 void 1671 ifa_ref(struct ifaddr *ifa) 1672 { 1673 1674 refcount_acquire(&ifa->ifa_refcnt); 1675 } 1676 1677 void 1678 ifa_free(struct ifaddr *ifa) 1679 { 1680 1681 if (refcount_release(&ifa->ifa_refcnt)) { 1682 counter_u64_free(ifa->ifa_opackets); 1683 counter_u64_free(ifa->ifa_ipackets); 1684 counter_u64_free(ifa->ifa_obytes); 1685 counter_u64_free(ifa->ifa_ibytes); 1686 free(ifa, M_IFADDR); 1687 } 1688 } 1689 1690 static int 1691 ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa, 1692 struct sockaddr *ia) 1693 { 1694 int error; 1695 struct rt_addrinfo info; 1696 struct sockaddr_dl null_sdl; 1697 struct ifnet *ifp; 1698 1699 ifp = ifa->ifa_ifp; 1700 1701 bzero(&info, sizeof(info)); 1702 if (cmd != RTM_DELETE) 1703 info.rti_ifp = V_loif; 1704 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; 1705 info.rti_info[RTAX_DST] = ia; 1706 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1707 link_init_sdl(ifp, (struct sockaddr *)&null_sdl, ifp->if_type); 1708 1709 error = rtrequest1_fib(cmd, &info, NULL, ifp->if_fib); 1710 1711 if (error != 0) 1712 log(LOG_DEBUG, "%s: %s failed for interface %s: %u\n", 1713 __func__, otype, if_name(ifp), error); 1714 1715 return (error); 1716 } 1717 1718 int 1719 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1720 { 1721 1722 return (ifa_maintain_loopback_route(RTM_ADD, "insertion", ifa, ia)); 1723 } 1724 1725 int 1726 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1727 { 1728 1729 return (ifa_maintain_loopback_route(RTM_DELETE, "deletion", ifa, ia)); 1730 } 1731 1732 int 1733 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1734 { 1735 1736 return (ifa_maintain_loopback_route(RTM_CHANGE, "switch", ifa, ia)); 1737 } 1738 1739 /* 1740 * XXX: Because sockaddr_dl has deeper structure than the sockaddr 1741 * structs used to represent other address families, it is necessary 1742 * to perform a different comparison. 1743 */ 1744 1745 #define sa_dl_equal(a1, a2) \ 1746 ((((const struct sockaddr_dl *)(a1))->sdl_len == \ 1747 ((const struct sockaddr_dl *)(a2))->sdl_len) && \ 1748 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \ 1749 CLLADDR((const struct sockaddr_dl *)(a2)), \ 1750 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0)) 1751 1752 /* 1753 * Locate an interface based on a complete address. 1754 */ 1755 /*ARGSUSED*/ 1756 static struct ifaddr * 1757 ifa_ifwithaddr_internal(const struct sockaddr *addr, int getref) 1758 { 1759 struct ifnet *ifp; 1760 struct ifaddr *ifa; 1761 1762 IFNET_RLOCK_NOSLEEP(); 1763 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1764 IF_ADDR_RLOCK(ifp); 1765 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1766 if (ifa->ifa_addr->sa_family != addr->sa_family) 1767 continue; 1768 if (sa_equal(addr, ifa->ifa_addr)) { 1769 if (getref) 1770 ifa_ref(ifa); 1771 IF_ADDR_RUNLOCK(ifp); 1772 goto done; 1773 } 1774 /* IP6 doesn't have broadcast */ 1775 if ((ifp->if_flags & IFF_BROADCAST) && 1776 ifa->ifa_broadaddr && 1777 ifa->ifa_broadaddr->sa_len != 0 && 1778 sa_equal(ifa->ifa_broadaddr, addr)) { 1779 if (getref) 1780 ifa_ref(ifa); 1781 IF_ADDR_RUNLOCK(ifp); 1782 goto done; 1783 } 1784 } 1785 IF_ADDR_RUNLOCK(ifp); 1786 } 1787 ifa = NULL; 1788 done: 1789 IFNET_RUNLOCK_NOSLEEP(); 1790 return (ifa); 1791 } 1792 1793 struct ifaddr * 1794 ifa_ifwithaddr(const struct sockaddr *addr) 1795 { 1796 1797 return (ifa_ifwithaddr_internal(addr, 1)); 1798 } 1799 1800 int 1801 ifa_ifwithaddr_check(const struct sockaddr *addr) 1802 { 1803 1804 return (ifa_ifwithaddr_internal(addr, 0) != NULL); 1805 } 1806 1807 /* 1808 * Locate an interface based on the broadcast address. 1809 */ 1810 /* ARGSUSED */ 1811 struct ifaddr * 1812 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum) 1813 { 1814 struct ifnet *ifp; 1815 struct ifaddr *ifa; 1816 1817 IFNET_RLOCK_NOSLEEP(); 1818 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1819 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1820 continue; 1821 IF_ADDR_RLOCK(ifp); 1822 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1823 if (ifa->ifa_addr->sa_family != addr->sa_family) 1824 continue; 1825 if ((ifp->if_flags & IFF_BROADCAST) && 1826 ifa->ifa_broadaddr && 1827 ifa->ifa_broadaddr->sa_len != 0 && 1828 sa_equal(ifa->ifa_broadaddr, addr)) { 1829 ifa_ref(ifa); 1830 IF_ADDR_RUNLOCK(ifp); 1831 goto done; 1832 } 1833 } 1834 IF_ADDR_RUNLOCK(ifp); 1835 } 1836 ifa = NULL; 1837 done: 1838 IFNET_RUNLOCK_NOSLEEP(); 1839 return (ifa); 1840 } 1841 1842 /* 1843 * Locate the point to point interface with a given destination address. 1844 */ 1845 /*ARGSUSED*/ 1846 struct ifaddr * 1847 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum) 1848 { 1849 struct ifnet *ifp; 1850 struct ifaddr *ifa; 1851 1852 IFNET_RLOCK_NOSLEEP(); 1853 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1854 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1855 continue; 1856 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1857 continue; 1858 IF_ADDR_RLOCK(ifp); 1859 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1860 if (ifa->ifa_addr->sa_family != addr->sa_family) 1861 continue; 1862 if (ifa->ifa_dstaddr != NULL && 1863 sa_equal(addr, ifa->ifa_dstaddr)) { 1864 ifa_ref(ifa); 1865 IF_ADDR_RUNLOCK(ifp); 1866 goto done; 1867 } 1868 } 1869 IF_ADDR_RUNLOCK(ifp); 1870 } 1871 ifa = NULL; 1872 done: 1873 IFNET_RUNLOCK_NOSLEEP(); 1874 return (ifa); 1875 } 1876 1877 /* 1878 * Find an interface on a specific network. If many, choice 1879 * is most specific found. 1880 */ 1881 struct ifaddr * 1882 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum) 1883 { 1884 struct ifnet *ifp; 1885 struct ifaddr *ifa; 1886 struct ifaddr *ifa_maybe = NULL; 1887 u_int af = addr->sa_family; 1888 const char *addr_data = addr->sa_data, *cplim; 1889 1890 /* 1891 * AF_LINK addresses can be looked up directly by their index number, 1892 * so do that if we can. 1893 */ 1894 if (af == AF_LINK) { 1895 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)addr; 1896 if (sdl->sdl_index && sdl->sdl_index <= V_if_index) 1897 return (ifaddr_byindex(sdl->sdl_index)); 1898 } 1899 1900 /* 1901 * Scan though each interface, looking for ones that have addresses 1902 * in this address family and the requested fib. Maintain a reference 1903 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that 1904 * kept it stable when we move onto the next interface. 1905 */ 1906 IFNET_RLOCK_NOSLEEP(); 1907 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1908 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1909 continue; 1910 IF_ADDR_RLOCK(ifp); 1911 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1912 const char *cp, *cp2, *cp3; 1913 1914 if (ifa->ifa_addr->sa_family != af) 1915 next: continue; 1916 if (af == AF_INET && 1917 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) { 1918 /* 1919 * This is a bit broken as it doesn't 1920 * take into account that the remote end may 1921 * be a single node in the network we are 1922 * looking for. 1923 * The trouble is that we don't know the 1924 * netmask for the remote end. 1925 */ 1926 if (ifa->ifa_dstaddr != NULL && 1927 sa_equal(addr, ifa->ifa_dstaddr)) { 1928 ifa_ref(ifa); 1929 IF_ADDR_RUNLOCK(ifp); 1930 goto done; 1931 } 1932 } else { 1933 /* 1934 * Scan all the bits in the ifa's address. 1935 * If a bit dissagrees with what we are 1936 * looking for, mask it with the netmask 1937 * to see if it really matters. 1938 * (A byte at a time) 1939 */ 1940 if (ifa->ifa_netmask == 0) 1941 continue; 1942 cp = addr_data; 1943 cp2 = ifa->ifa_addr->sa_data; 1944 cp3 = ifa->ifa_netmask->sa_data; 1945 cplim = ifa->ifa_netmask->sa_len 1946 + (char *)ifa->ifa_netmask; 1947 while (cp3 < cplim) 1948 if ((*cp++ ^ *cp2++) & *cp3++) 1949 goto next; /* next address! */ 1950 /* 1951 * If the netmask of what we just found 1952 * is more specific than what we had before 1953 * (if we had one), or if the virtual status 1954 * of new prefix is better than of the old one, 1955 * then remember the new one before continuing 1956 * to search for an even better one. 1957 */ 1958 if (ifa_maybe == NULL || 1959 ifa_preferred(ifa_maybe, ifa) || 1960 rn_refines((caddr_t)ifa->ifa_netmask, 1961 (caddr_t)ifa_maybe->ifa_netmask)) { 1962 if (ifa_maybe != NULL) 1963 ifa_free(ifa_maybe); 1964 ifa_maybe = ifa; 1965 ifa_ref(ifa_maybe); 1966 } 1967 } 1968 } 1969 IF_ADDR_RUNLOCK(ifp); 1970 } 1971 ifa = ifa_maybe; 1972 ifa_maybe = NULL; 1973 done: 1974 IFNET_RUNLOCK_NOSLEEP(); 1975 if (ifa_maybe != NULL) 1976 ifa_free(ifa_maybe); 1977 return (ifa); 1978 } 1979 1980 /* 1981 * Find an interface address specific to an interface best matching 1982 * a given address. 1983 */ 1984 struct ifaddr * 1985 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp) 1986 { 1987 struct ifaddr *ifa; 1988 const char *cp, *cp2, *cp3; 1989 char *cplim; 1990 struct ifaddr *ifa_maybe = NULL; 1991 u_int af = addr->sa_family; 1992 1993 if (af >= AF_MAX) 1994 return (NULL); 1995 IF_ADDR_RLOCK(ifp); 1996 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1997 if (ifa->ifa_addr->sa_family != af) 1998 continue; 1999 if (ifa_maybe == NULL) 2000 ifa_maybe = ifa; 2001 if (ifa->ifa_netmask == 0) { 2002 if (sa_equal(addr, ifa->ifa_addr) || 2003 (ifa->ifa_dstaddr && 2004 sa_equal(addr, ifa->ifa_dstaddr))) 2005 goto done; 2006 continue; 2007 } 2008 if (ifp->if_flags & IFF_POINTOPOINT) { 2009 if (sa_equal(addr, ifa->ifa_dstaddr)) 2010 goto done; 2011 } else { 2012 cp = addr->sa_data; 2013 cp2 = ifa->ifa_addr->sa_data; 2014 cp3 = ifa->ifa_netmask->sa_data; 2015 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 2016 for (; cp3 < cplim; cp3++) 2017 if ((*cp++ ^ *cp2++) & *cp3) 2018 break; 2019 if (cp3 == cplim) 2020 goto done; 2021 } 2022 } 2023 ifa = ifa_maybe; 2024 done: 2025 if (ifa != NULL) 2026 ifa_ref(ifa); 2027 IF_ADDR_RUNLOCK(ifp); 2028 return (ifa); 2029 } 2030 2031 /* 2032 * See whether new ifa is better than current one: 2033 * 1) A non-virtual one is preferred over virtual. 2034 * 2) A virtual in master state preferred over any other state. 2035 * 2036 * Used in several address selecting functions. 2037 */ 2038 int 2039 ifa_preferred(struct ifaddr *cur, struct ifaddr *next) 2040 { 2041 2042 return (cur->ifa_carp && (!next->ifa_carp || 2043 ((*carp_master_p)(next) && !(*carp_master_p)(cur)))); 2044 } 2045 2046 #include <net/if_llatbl.h> 2047 2048 /* 2049 * Default action when installing a route with a Link Level gateway. 2050 * Lookup an appropriate real ifa to point to. 2051 * This should be moved to /sys/net/link.c eventually. 2052 */ 2053 static void 2054 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 2055 { 2056 struct ifaddr *ifa, *oifa; 2057 struct sockaddr *dst; 2058 struct ifnet *ifp; 2059 2060 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == NULL) || 2061 ((ifp = ifa->ifa_ifp) == NULL) || ((dst = rt_key(rt)) == NULL)) 2062 return; 2063 ifa = ifaof_ifpforaddr(dst, ifp); 2064 if (ifa) { 2065 oifa = rt->rt_ifa; 2066 rt->rt_ifa = ifa; 2067 ifa_free(oifa); 2068 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 2069 ifa->ifa_rtrequest(cmd, rt, info); 2070 } 2071 } 2072 2073 struct sockaddr_dl * 2074 link_alloc_sdl(size_t size, int flags) 2075 { 2076 2077 return (malloc(size, M_TEMP, flags)); 2078 } 2079 2080 void 2081 link_free_sdl(struct sockaddr *sa) 2082 { 2083 free(sa, M_TEMP); 2084 } 2085 2086 /* 2087 * Fills in given sdl with interface basic info. 2088 * Returns pointer to filled sdl. 2089 */ 2090 struct sockaddr_dl * 2091 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype) 2092 { 2093 struct sockaddr_dl *sdl; 2094 2095 sdl = (struct sockaddr_dl *)paddr; 2096 memset(sdl, 0, sizeof(struct sockaddr_dl)); 2097 sdl->sdl_len = sizeof(struct sockaddr_dl); 2098 sdl->sdl_family = AF_LINK; 2099 sdl->sdl_index = ifp->if_index; 2100 sdl->sdl_type = iftype; 2101 2102 return (sdl); 2103 } 2104 2105 /* 2106 * Mark an interface down and notify protocols of 2107 * the transition. 2108 */ 2109 static void 2110 if_unroute(struct ifnet *ifp, int flag, int fam) 2111 { 2112 struct ifaddr *ifa; 2113 2114 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP")); 2115 2116 ifp->if_flags &= ~flag; 2117 getmicrotime(&ifp->if_lastchange); 2118 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2119 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2120 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 2121 ifp->if_qflush(ifp); 2122 2123 if (ifp->if_carp) 2124 (*carp_linkstate_p)(ifp); 2125 rt_ifmsg(ifp); 2126 } 2127 2128 /* 2129 * Mark an interface up and notify protocols of 2130 * the transition. 2131 */ 2132 static void 2133 if_route(struct ifnet *ifp, int flag, int fam) 2134 { 2135 struct ifaddr *ifa; 2136 2137 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP")); 2138 2139 ifp->if_flags |= flag; 2140 getmicrotime(&ifp->if_lastchange); 2141 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2142 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2143 pfctlinput(PRC_IFUP, ifa->ifa_addr); 2144 if (ifp->if_carp) 2145 (*carp_linkstate_p)(ifp); 2146 rt_ifmsg(ifp); 2147 #ifdef INET6 2148 in6_if_up(ifp); 2149 #endif 2150 } 2151 2152 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */ 2153 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */ 2154 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *); 2155 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t); 2156 int (*vlan_tag_p)(struct ifnet *, uint16_t *); 2157 int (*vlan_setcookie_p)(struct ifnet *, void *); 2158 void *(*vlan_cookie_p)(struct ifnet *); 2159 2160 /* 2161 * Handle a change in the interface link state. To avoid LORs 2162 * between driver lock and upper layer locks, as well as possible 2163 * recursions, we post event to taskqueue, and all job 2164 * is done in static do_link_state_change(). 2165 */ 2166 void 2167 if_link_state_change(struct ifnet *ifp, int link_state) 2168 { 2169 /* Return if state hasn't changed. */ 2170 if (ifp->if_link_state == link_state) 2171 return; 2172 2173 ifp->if_link_state = link_state; 2174 2175 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask); 2176 } 2177 2178 static void 2179 do_link_state_change(void *arg, int pending) 2180 { 2181 struct ifnet *ifp = (struct ifnet *)arg; 2182 int link_state = ifp->if_link_state; 2183 CURVNET_SET(ifp->if_vnet); 2184 2185 /* Notify that the link state has changed. */ 2186 rt_ifmsg(ifp); 2187 if (ifp->if_vlantrunk != NULL) 2188 (*vlan_link_state_p)(ifp); 2189 2190 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) && 2191 ifp->if_l2com != NULL) 2192 (*ng_ether_link_state_p)(ifp, link_state); 2193 if (ifp->if_carp) 2194 (*carp_linkstate_p)(ifp); 2195 if (ifp->if_bridge) 2196 (*bridge_linkstate_p)(ifp); 2197 if (ifp->if_lagg) 2198 (*lagg_linkstate_p)(ifp, link_state); 2199 2200 if (IS_DEFAULT_VNET(curvnet)) 2201 devctl_notify("IFNET", ifp->if_xname, 2202 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", 2203 NULL); 2204 if (pending > 1) 2205 if_printf(ifp, "%d link states coalesced\n", pending); 2206 if (log_link_state_change) 2207 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname, 2208 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" ); 2209 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, link_state); 2210 CURVNET_RESTORE(); 2211 } 2212 2213 /* 2214 * Mark an interface down and notify protocols of 2215 * the transition. 2216 */ 2217 void 2218 if_down(struct ifnet *ifp) 2219 { 2220 2221 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_DOWN); 2222 if_unroute(ifp, IFF_UP, AF_UNSPEC); 2223 } 2224 2225 /* 2226 * Mark an interface up and notify protocols of 2227 * the transition. 2228 */ 2229 void 2230 if_up(struct ifnet *ifp) 2231 { 2232 2233 if_route(ifp, IFF_UP, AF_UNSPEC); 2234 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_UP); 2235 } 2236 2237 /* 2238 * Flush an interface queue. 2239 */ 2240 void 2241 if_qflush(struct ifnet *ifp) 2242 { 2243 struct mbuf *m, *n; 2244 struct ifaltq *ifq; 2245 2246 ifq = &ifp->if_snd; 2247 IFQ_LOCK(ifq); 2248 #ifdef ALTQ 2249 if (ALTQ_IS_ENABLED(ifq)) 2250 ALTQ_PURGE(ifq); 2251 #endif 2252 n = ifq->ifq_head; 2253 while ((m = n) != NULL) { 2254 n = m->m_nextpkt; 2255 m_freem(m); 2256 } 2257 ifq->ifq_head = 0; 2258 ifq->ifq_tail = 0; 2259 ifq->ifq_len = 0; 2260 IFQ_UNLOCK(ifq); 2261 } 2262 2263 /* 2264 * Map interface name to interface structure pointer, with or without 2265 * returning a reference. 2266 */ 2267 struct ifnet * 2268 ifunit_ref(const char *name) 2269 { 2270 struct ifnet *ifp; 2271 2272 IFNET_RLOCK_NOSLEEP(); 2273 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2274 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 && 2275 !(ifp->if_flags & IFF_DYING)) 2276 break; 2277 } 2278 if (ifp != NULL) 2279 if_ref(ifp); 2280 IFNET_RUNLOCK_NOSLEEP(); 2281 return (ifp); 2282 } 2283 2284 struct ifnet * 2285 ifunit(const char *name) 2286 { 2287 struct ifnet *ifp; 2288 2289 IFNET_RLOCK_NOSLEEP(); 2290 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2291 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0) 2292 break; 2293 } 2294 IFNET_RUNLOCK_NOSLEEP(); 2295 return (ifp); 2296 } 2297 2298 /* 2299 * Hardware specific interface ioctls. 2300 */ 2301 static int 2302 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td) 2303 { 2304 struct ifreq *ifr; 2305 int error = 0, do_ifup = 0; 2306 int new_flags, temp_flags; 2307 size_t namelen, onamelen; 2308 size_t descrlen; 2309 char *descrbuf, *odescrbuf; 2310 char new_name[IFNAMSIZ]; 2311 struct ifaddr *ifa; 2312 struct sockaddr_dl *sdl; 2313 2314 ifr = (struct ifreq *)data; 2315 switch (cmd) { 2316 case SIOCGIFINDEX: 2317 ifr->ifr_index = ifp->if_index; 2318 break; 2319 2320 case SIOCGIFFLAGS: 2321 temp_flags = ifp->if_flags | ifp->if_drv_flags; 2322 ifr->ifr_flags = temp_flags & 0xffff; 2323 ifr->ifr_flagshigh = temp_flags >> 16; 2324 break; 2325 2326 case SIOCGIFCAP: 2327 ifr->ifr_reqcap = ifp->if_capabilities; 2328 ifr->ifr_curcap = ifp->if_capenable; 2329 break; 2330 2331 #ifdef MAC 2332 case SIOCGIFMAC: 2333 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp); 2334 break; 2335 #endif 2336 2337 case SIOCGIFMETRIC: 2338 ifr->ifr_metric = ifp->if_metric; 2339 break; 2340 2341 case SIOCGIFMTU: 2342 ifr->ifr_mtu = ifp->if_mtu; 2343 break; 2344 2345 case SIOCGIFPHYS: 2346 /* XXXGL: did this ever worked? */ 2347 ifr->ifr_phys = 0; 2348 break; 2349 2350 case SIOCGIFDESCR: 2351 error = 0; 2352 sx_slock(&ifdescr_sx); 2353 if (ifp->if_description == NULL) 2354 error = ENOMSG; 2355 else { 2356 /* space for terminating nul */ 2357 descrlen = strlen(ifp->if_description) + 1; 2358 if (ifr->ifr_buffer.length < descrlen) 2359 ifr->ifr_buffer.buffer = NULL; 2360 else 2361 error = copyout(ifp->if_description, 2362 ifr->ifr_buffer.buffer, descrlen); 2363 ifr->ifr_buffer.length = descrlen; 2364 } 2365 sx_sunlock(&ifdescr_sx); 2366 break; 2367 2368 case SIOCSIFDESCR: 2369 error = priv_check(td, PRIV_NET_SETIFDESCR); 2370 if (error) 2371 return (error); 2372 2373 /* 2374 * Copy only (length-1) bytes to make sure that 2375 * if_description is always nul terminated. The 2376 * length parameter is supposed to count the 2377 * terminating nul in. 2378 */ 2379 if (ifr->ifr_buffer.length > ifdescr_maxlen) 2380 return (ENAMETOOLONG); 2381 else if (ifr->ifr_buffer.length == 0) 2382 descrbuf = NULL; 2383 else { 2384 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR, 2385 M_WAITOK | M_ZERO); 2386 error = copyin(ifr->ifr_buffer.buffer, descrbuf, 2387 ifr->ifr_buffer.length - 1); 2388 if (error) { 2389 free(descrbuf, M_IFDESCR); 2390 break; 2391 } 2392 } 2393 2394 sx_xlock(&ifdescr_sx); 2395 odescrbuf = ifp->if_description; 2396 ifp->if_description = descrbuf; 2397 sx_xunlock(&ifdescr_sx); 2398 2399 getmicrotime(&ifp->if_lastchange); 2400 free(odescrbuf, M_IFDESCR); 2401 break; 2402 2403 case SIOCGIFFIB: 2404 ifr->ifr_fib = ifp->if_fib; 2405 break; 2406 2407 case SIOCSIFFIB: 2408 error = priv_check(td, PRIV_NET_SETIFFIB); 2409 if (error) 2410 return (error); 2411 if (ifr->ifr_fib >= rt_numfibs) 2412 return (EINVAL); 2413 2414 ifp->if_fib = ifr->ifr_fib; 2415 break; 2416 2417 case SIOCSIFFLAGS: 2418 error = priv_check(td, PRIV_NET_SETIFFLAGS); 2419 if (error) 2420 return (error); 2421 /* 2422 * Currently, no driver owned flags pass the IFF_CANTCHANGE 2423 * check, so we don't need special handling here yet. 2424 */ 2425 new_flags = (ifr->ifr_flags & 0xffff) | 2426 (ifr->ifr_flagshigh << 16); 2427 if (ifp->if_flags & IFF_UP && 2428 (new_flags & IFF_UP) == 0) { 2429 if_down(ifp); 2430 } else if (new_flags & IFF_UP && 2431 (ifp->if_flags & IFF_UP) == 0) { 2432 do_ifup = 1; 2433 } 2434 /* See if permanently promiscuous mode bit is about to flip */ 2435 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) { 2436 if (new_flags & IFF_PPROMISC) 2437 ifp->if_flags |= IFF_PROMISC; 2438 else if (ifp->if_pcount == 0) 2439 ifp->if_flags &= ~IFF_PROMISC; 2440 if (log_promisc_mode_change) 2441 log(LOG_INFO, "%s: permanently promiscuous mode %s\n", 2442 ifp->if_xname, 2443 ((new_flags & IFF_PPROMISC) ? 2444 "enabled" : "disabled")); 2445 } 2446 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 2447 (new_flags &~ IFF_CANTCHANGE); 2448 if (ifp->if_ioctl) { 2449 (void) (*ifp->if_ioctl)(ifp, cmd, data); 2450 } 2451 if (do_ifup) 2452 if_up(ifp); 2453 getmicrotime(&ifp->if_lastchange); 2454 break; 2455 2456 case SIOCSIFCAP: 2457 error = priv_check(td, PRIV_NET_SETIFCAP); 2458 if (error) 2459 return (error); 2460 if (ifp->if_ioctl == NULL) 2461 return (EOPNOTSUPP); 2462 if (ifr->ifr_reqcap & ~ifp->if_capabilities) 2463 return (EINVAL); 2464 error = (*ifp->if_ioctl)(ifp, cmd, data); 2465 if (error == 0) 2466 getmicrotime(&ifp->if_lastchange); 2467 break; 2468 2469 #ifdef MAC 2470 case SIOCSIFMAC: 2471 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp); 2472 break; 2473 #endif 2474 2475 case SIOCSIFNAME: 2476 error = priv_check(td, PRIV_NET_SETIFNAME); 2477 if (error) 2478 return (error); 2479 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 2480 if (error != 0) 2481 return (error); 2482 if (new_name[0] == '\0') 2483 return (EINVAL); 2484 if (new_name[IFNAMSIZ-1] != '\0') { 2485 new_name[IFNAMSIZ-1] = '\0'; 2486 if (strlen(new_name) == IFNAMSIZ-1) 2487 return (EINVAL); 2488 } 2489 if (ifunit(new_name) != NULL) 2490 return (EEXIST); 2491 2492 /* 2493 * XXX: Locking. Nothing else seems to lock if_flags, 2494 * and there are numerous other races with the 2495 * ifunit() checks not being atomic with namespace 2496 * changes (renames, vmoves, if_attach, etc). 2497 */ 2498 ifp->if_flags |= IFF_RENAMING; 2499 2500 /* Announce the departure of the interface. */ 2501 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 2502 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 2503 2504 log(LOG_INFO, "%s: changing name to '%s'\n", 2505 ifp->if_xname, new_name); 2506 2507 IF_ADDR_WLOCK(ifp); 2508 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 2509 ifa = ifp->if_addr; 2510 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 2511 namelen = strlen(new_name); 2512 onamelen = sdl->sdl_nlen; 2513 /* 2514 * Move the address if needed. This is safe because we 2515 * allocate space for a name of length IFNAMSIZ when we 2516 * create this in if_attach(). 2517 */ 2518 if (namelen != onamelen) { 2519 bcopy(sdl->sdl_data + onamelen, 2520 sdl->sdl_data + namelen, sdl->sdl_alen); 2521 } 2522 bcopy(new_name, sdl->sdl_data, namelen); 2523 sdl->sdl_nlen = namelen; 2524 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 2525 bzero(sdl->sdl_data, onamelen); 2526 while (namelen != 0) 2527 sdl->sdl_data[--namelen] = 0xff; 2528 IF_ADDR_WUNLOCK(ifp); 2529 2530 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 2531 /* Announce the return of the interface. */ 2532 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 2533 2534 ifp->if_flags &= ~IFF_RENAMING; 2535 break; 2536 2537 #ifdef VIMAGE 2538 case SIOCSIFVNET: 2539 error = priv_check(td, PRIV_NET_SETIFVNET); 2540 if (error) 2541 return (error); 2542 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid); 2543 break; 2544 #endif 2545 2546 case SIOCSIFMETRIC: 2547 error = priv_check(td, PRIV_NET_SETIFMETRIC); 2548 if (error) 2549 return (error); 2550 ifp->if_metric = ifr->ifr_metric; 2551 getmicrotime(&ifp->if_lastchange); 2552 break; 2553 2554 case SIOCSIFPHYS: 2555 error = priv_check(td, PRIV_NET_SETIFPHYS); 2556 if (error) 2557 return (error); 2558 if (ifp->if_ioctl == NULL) 2559 return (EOPNOTSUPP); 2560 error = (*ifp->if_ioctl)(ifp, cmd, data); 2561 if (error == 0) 2562 getmicrotime(&ifp->if_lastchange); 2563 break; 2564 2565 case SIOCSIFMTU: 2566 { 2567 u_long oldmtu = ifp->if_mtu; 2568 2569 error = priv_check(td, PRIV_NET_SETIFMTU); 2570 if (error) 2571 return (error); 2572 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) 2573 return (EINVAL); 2574 if (ifp->if_ioctl == NULL) 2575 return (EOPNOTSUPP); 2576 error = (*ifp->if_ioctl)(ifp, cmd, data); 2577 if (error == 0) { 2578 getmicrotime(&ifp->if_lastchange); 2579 rt_ifmsg(ifp); 2580 } 2581 /* 2582 * If the link MTU changed, do network layer specific procedure. 2583 */ 2584 if (ifp->if_mtu != oldmtu) { 2585 #ifdef INET6 2586 nd6_setmtu(ifp); 2587 #endif 2588 rt_updatemtu(ifp); 2589 } 2590 break; 2591 } 2592 2593 case SIOCADDMULTI: 2594 case SIOCDELMULTI: 2595 if (cmd == SIOCADDMULTI) 2596 error = priv_check(td, PRIV_NET_ADDMULTI); 2597 else 2598 error = priv_check(td, PRIV_NET_DELMULTI); 2599 if (error) 2600 return (error); 2601 2602 /* Don't allow group membership on non-multicast interfaces. */ 2603 if ((ifp->if_flags & IFF_MULTICAST) == 0) 2604 return (EOPNOTSUPP); 2605 2606 /* Don't let users screw up protocols' entries. */ 2607 if (ifr->ifr_addr.sa_family != AF_LINK) 2608 return (EINVAL); 2609 2610 if (cmd == SIOCADDMULTI) { 2611 struct ifmultiaddr *ifma; 2612 2613 /* 2614 * Userland is only permitted to join groups once 2615 * via the if_addmulti() KPI, because it cannot hold 2616 * struct ifmultiaddr * between calls. It may also 2617 * lose a race while we check if the membership 2618 * already exists. 2619 */ 2620 IF_ADDR_RLOCK(ifp); 2621 ifma = if_findmulti(ifp, &ifr->ifr_addr); 2622 IF_ADDR_RUNLOCK(ifp); 2623 if (ifma != NULL) 2624 error = EADDRINUSE; 2625 else 2626 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 2627 } else { 2628 error = if_delmulti(ifp, &ifr->ifr_addr); 2629 } 2630 if (error == 0) 2631 getmicrotime(&ifp->if_lastchange); 2632 break; 2633 2634 case SIOCSIFPHYADDR: 2635 case SIOCDIFPHYADDR: 2636 #ifdef INET6 2637 case SIOCSIFPHYADDR_IN6: 2638 #endif 2639 case SIOCSIFMEDIA: 2640 case SIOCSIFGENERIC: 2641 error = priv_check(td, PRIV_NET_HWIOCTL); 2642 if (error) 2643 return (error); 2644 if (ifp->if_ioctl == NULL) 2645 return (EOPNOTSUPP); 2646 error = (*ifp->if_ioctl)(ifp, cmd, data); 2647 if (error == 0) 2648 getmicrotime(&ifp->if_lastchange); 2649 break; 2650 2651 case SIOCGIFSTATUS: 2652 case SIOCGIFPSRCADDR: 2653 case SIOCGIFPDSTADDR: 2654 case SIOCGIFMEDIA: 2655 case SIOCGIFXMEDIA: 2656 case SIOCGIFGENERIC: 2657 if (ifp->if_ioctl == NULL) 2658 return (EOPNOTSUPP); 2659 error = (*ifp->if_ioctl)(ifp, cmd, data); 2660 break; 2661 2662 case SIOCSIFLLADDR: 2663 error = priv_check(td, PRIV_NET_SETLLADDR); 2664 if (error) 2665 return (error); 2666 error = if_setlladdr(ifp, 2667 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); 2668 break; 2669 2670 case SIOCAIFGROUP: 2671 { 2672 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2673 2674 error = priv_check(td, PRIV_NET_ADDIFGROUP); 2675 if (error) 2676 return (error); 2677 if ((error = if_addgroup(ifp, ifgr->ifgr_group))) 2678 return (error); 2679 break; 2680 } 2681 2682 case SIOCGIFGROUP: 2683 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp))) 2684 return (error); 2685 break; 2686 2687 case SIOCDIFGROUP: 2688 { 2689 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2690 2691 error = priv_check(td, PRIV_NET_DELIFGROUP); 2692 if (error) 2693 return (error); 2694 if ((error = if_delgroup(ifp, ifgr->ifgr_group))) 2695 return (error); 2696 break; 2697 } 2698 2699 default: 2700 error = ENOIOCTL; 2701 break; 2702 } 2703 return (error); 2704 } 2705 2706 #ifdef COMPAT_FREEBSD32 2707 struct ifconf32 { 2708 int32_t ifc_len; 2709 union { 2710 uint32_t ifcu_buf; 2711 uint32_t ifcu_req; 2712 } ifc_ifcu; 2713 }; 2714 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32) 2715 #endif 2716 2717 /* 2718 * Interface ioctls. 2719 */ 2720 int 2721 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td) 2722 { 2723 struct ifnet *ifp; 2724 struct ifreq *ifr; 2725 int error; 2726 int oif_flags; 2727 #ifdef VIMAGE 2728 int shutdown; 2729 #endif 2730 2731 CURVNET_SET(so->so_vnet); 2732 #ifdef VIMAGE 2733 /* Make sure the VNET is stable. */ 2734 shutdown = (so->so_vnet->vnet_state > SI_SUB_VNET && 2735 so->so_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0; 2736 if (shutdown) { 2737 CURVNET_RESTORE(); 2738 return (EBUSY); 2739 } 2740 #endif 2741 2742 2743 switch (cmd) { 2744 case SIOCGIFCONF: 2745 error = ifconf(cmd, data); 2746 CURVNET_RESTORE(); 2747 return (error); 2748 2749 #ifdef COMPAT_FREEBSD32 2750 case SIOCGIFCONF32: 2751 { 2752 struct ifconf32 *ifc32; 2753 struct ifconf ifc; 2754 2755 ifc32 = (struct ifconf32 *)data; 2756 ifc.ifc_len = ifc32->ifc_len; 2757 ifc.ifc_buf = PTRIN(ifc32->ifc_buf); 2758 2759 error = ifconf(SIOCGIFCONF, (void *)&ifc); 2760 CURVNET_RESTORE(); 2761 if (error == 0) 2762 ifc32->ifc_len = ifc.ifc_len; 2763 return (error); 2764 } 2765 #endif 2766 } 2767 ifr = (struct ifreq *)data; 2768 2769 switch (cmd) { 2770 #ifdef VIMAGE 2771 case SIOCSIFRVNET: 2772 error = priv_check(td, PRIV_NET_SETIFVNET); 2773 if (error == 0) 2774 error = if_vmove_reclaim(td, ifr->ifr_name, 2775 ifr->ifr_jid); 2776 CURVNET_RESTORE(); 2777 return (error); 2778 #endif 2779 case SIOCIFCREATE: 2780 case SIOCIFCREATE2: 2781 error = priv_check(td, PRIV_NET_IFCREATE); 2782 if (error == 0) 2783 error = if_clone_create(ifr->ifr_name, 2784 sizeof(ifr->ifr_name), 2785 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL); 2786 CURVNET_RESTORE(); 2787 return (error); 2788 case SIOCIFDESTROY: 2789 error = priv_check(td, PRIV_NET_IFDESTROY); 2790 if (error == 0) 2791 error = if_clone_destroy(ifr->ifr_name); 2792 CURVNET_RESTORE(); 2793 return (error); 2794 2795 case SIOCIFGCLONERS: 2796 error = if_clone_list((struct if_clonereq *)data); 2797 CURVNET_RESTORE(); 2798 return (error); 2799 case SIOCGIFGMEMB: 2800 error = if_getgroupmembers((struct ifgroupreq *)data); 2801 CURVNET_RESTORE(); 2802 return (error); 2803 #if defined(INET) || defined(INET6) 2804 case SIOCSVH: 2805 case SIOCGVH: 2806 if (carp_ioctl_p == NULL) 2807 error = EPROTONOSUPPORT; 2808 else 2809 error = (*carp_ioctl_p)(ifr, cmd, td); 2810 CURVNET_RESTORE(); 2811 return (error); 2812 #endif 2813 } 2814 2815 ifp = ifunit_ref(ifr->ifr_name); 2816 if (ifp == NULL) { 2817 CURVNET_RESTORE(); 2818 return (ENXIO); 2819 } 2820 2821 error = ifhwioctl(cmd, ifp, data, td); 2822 if (error != ENOIOCTL) { 2823 if_rele(ifp); 2824 CURVNET_RESTORE(); 2825 return (error); 2826 } 2827 2828 oif_flags = ifp->if_flags; 2829 if (so->so_proto == NULL) { 2830 if_rele(ifp); 2831 CURVNET_RESTORE(); 2832 return (EOPNOTSUPP); 2833 } 2834 2835 /* 2836 * Pass the request on to the socket control method, and if the 2837 * latter returns EOPNOTSUPP, directly to the interface. 2838 * 2839 * Make an exception for the legacy SIOCSIF* requests. Drivers 2840 * trust SIOCSIFADDR et al to come from an already privileged 2841 * layer, and do not perform any credentials checks or input 2842 * validation. 2843 */ 2844 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 2845 ifp, td)); 2846 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL && 2847 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR && 2848 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK) 2849 error = (*ifp->if_ioctl)(ifp, cmd, data); 2850 2851 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 2852 #ifdef INET6 2853 if (ifp->if_flags & IFF_UP) 2854 in6_if_up(ifp); 2855 #endif 2856 } 2857 if_rele(ifp); 2858 CURVNET_RESTORE(); 2859 return (error); 2860 } 2861 2862 /* 2863 * The code common to handling reference counted flags, 2864 * e.g., in ifpromisc() and if_allmulti(). 2865 * The "pflag" argument can specify a permanent mode flag to check, 2866 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none. 2867 * 2868 * Only to be used on stack-owned flags, not driver-owned flags. 2869 */ 2870 static int 2871 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch) 2872 { 2873 struct ifreq ifr; 2874 int error; 2875 int oldflags, oldcount; 2876 2877 /* Sanity checks to catch programming errors */ 2878 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0, 2879 ("%s: setting driver-owned flag %d", __func__, flag)); 2880 2881 if (onswitch) 2882 KASSERT(*refcount >= 0, 2883 ("%s: increment negative refcount %d for flag %d", 2884 __func__, *refcount, flag)); 2885 else 2886 KASSERT(*refcount > 0, 2887 ("%s: decrement non-positive refcount %d for flag %d", 2888 __func__, *refcount, flag)); 2889 2890 /* In case this mode is permanent, just touch refcount */ 2891 if (ifp->if_flags & pflag) { 2892 *refcount += onswitch ? 1 : -1; 2893 return (0); 2894 } 2895 2896 /* Save ifnet parameters for if_ioctl() may fail */ 2897 oldcount = *refcount; 2898 oldflags = ifp->if_flags; 2899 2900 /* 2901 * See if we aren't the only and touching refcount is enough. 2902 * Actually toggle interface flag if we are the first or last. 2903 */ 2904 if (onswitch) { 2905 if ((*refcount)++) 2906 return (0); 2907 ifp->if_flags |= flag; 2908 } else { 2909 if (--(*refcount)) 2910 return (0); 2911 ifp->if_flags &= ~flag; 2912 } 2913 2914 /* Call down the driver since we've changed interface flags */ 2915 if (ifp->if_ioctl == NULL) { 2916 error = EOPNOTSUPP; 2917 goto recover; 2918 } 2919 ifr.ifr_flags = ifp->if_flags & 0xffff; 2920 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2921 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 2922 if (error) 2923 goto recover; 2924 /* Notify userland that interface flags have changed */ 2925 rt_ifmsg(ifp); 2926 return (0); 2927 2928 recover: 2929 /* Recover after driver error */ 2930 *refcount = oldcount; 2931 ifp->if_flags = oldflags; 2932 return (error); 2933 } 2934 2935 /* 2936 * Set/clear promiscuous mode on interface ifp based on the truth value 2937 * of pswitch. The calls are reference counted so that only the first 2938 * "on" request actually has an effect, as does the final "off" request. 2939 * Results are undefined if the "off" and "on" requests are not matched. 2940 */ 2941 int 2942 ifpromisc(struct ifnet *ifp, int pswitch) 2943 { 2944 int error; 2945 int oldflags = ifp->if_flags; 2946 2947 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC, 2948 &ifp->if_pcount, pswitch); 2949 /* If promiscuous mode status has changed, log a message */ 2950 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) && 2951 log_promisc_mode_change) 2952 log(LOG_INFO, "%s: promiscuous mode %s\n", 2953 ifp->if_xname, 2954 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled"); 2955 return (error); 2956 } 2957 2958 /* 2959 * Return interface configuration 2960 * of system. List may be used 2961 * in later ioctl's (above) to get 2962 * other information. 2963 */ 2964 /*ARGSUSED*/ 2965 static int 2966 ifconf(u_long cmd, caddr_t data) 2967 { 2968 struct ifconf *ifc = (struct ifconf *)data; 2969 struct ifnet *ifp; 2970 struct ifaddr *ifa; 2971 struct ifreq ifr; 2972 struct sbuf *sb; 2973 int error, full = 0, valid_len, max_len; 2974 2975 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */ 2976 max_len = MAXPHYS - 1; 2977 2978 /* Prevent hostile input from being able to crash the system */ 2979 if (ifc->ifc_len <= 0) 2980 return (EINVAL); 2981 2982 again: 2983 if (ifc->ifc_len <= max_len) { 2984 max_len = ifc->ifc_len; 2985 full = 1; 2986 } 2987 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN); 2988 max_len = 0; 2989 valid_len = 0; 2990 2991 IFNET_RLOCK(); 2992 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2993 int addrs; 2994 2995 /* 2996 * Zero the ifr_name buffer to make sure we don't 2997 * disclose the contents of the stack. 2998 */ 2999 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name)); 3000 3001 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 3002 >= sizeof(ifr.ifr_name)) { 3003 sbuf_delete(sb); 3004 IFNET_RUNLOCK(); 3005 return (ENAMETOOLONG); 3006 } 3007 3008 addrs = 0; 3009 IF_ADDR_RLOCK(ifp); 3010 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 3011 struct sockaddr *sa = ifa->ifa_addr; 3012 3013 if (prison_if(curthread->td_ucred, sa) != 0) 3014 continue; 3015 addrs++; 3016 if (sa->sa_len <= sizeof(*sa)) { 3017 ifr.ifr_addr = *sa; 3018 sbuf_bcat(sb, &ifr, sizeof(ifr)); 3019 max_len += sizeof(ifr); 3020 } else { 3021 sbuf_bcat(sb, &ifr, 3022 offsetof(struct ifreq, ifr_addr)); 3023 max_len += offsetof(struct ifreq, ifr_addr); 3024 sbuf_bcat(sb, sa, sa->sa_len); 3025 max_len += sa->sa_len; 3026 } 3027 3028 if (sbuf_error(sb) == 0) 3029 valid_len = sbuf_len(sb); 3030 } 3031 IF_ADDR_RUNLOCK(ifp); 3032 if (addrs == 0) { 3033 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr)); 3034 sbuf_bcat(sb, &ifr, sizeof(ifr)); 3035 max_len += sizeof(ifr); 3036 3037 if (sbuf_error(sb) == 0) 3038 valid_len = sbuf_len(sb); 3039 } 3040 } 3041 IFNET_RUNLOCK(); 3042 3043 /* 3044 * If we didn't allocate enough space (uncommon), try again. If 3045 * we have already allocated as much space as we are allowed, 3046 * return what we've got. 3047 */ 3048 if (valid_len != max_len && !full) { 3049 sbuf_delete(sb); 3050 goto again; 3051 } 3052 3053 ifc->ifc_len = valid_len; 3054 sbuf_finish(sb); 3055 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len); 3056 sbuf_delete(sb); 3057 return (error); 3058 } 3059 3060 /* 3061 * Just like ifpromisc(), but for all-multicast-reception mode. 3062 */ 3063 int 3064 if_allmulti(struct ifnet *ifp, int onswitch) 3065 { 3066 3067 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch)); 3068 } 3069 3070 struct ifmultiaddr * 3071 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa) 3072 { 3073 struct ifmultiaddr *ifma; 3074 3075 IF_ADDR_LOCK_ASSERT(ifp); 3076 3077 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 3078 if (sa->sa_family == AF_LINK) { 3079 if (sa_dl_equal(ifma->ifma_addr, sa)) 3080 break; 3081 } else { 3082 if (sa_equal(ifma->ifma_addr, sa)) 3083 break; 3084 } 3085 } 3086 3087 return ifma; 3088 } 3089 3090 /* 3091 * Allocate a new ifmultiaddr and initialize based on passed arguments. We 3092 * make copies of passed sockaddrs. The ifmultiaddr will not be added to 3093 * the ifnet multicast address list here, so the caller must do that and 3094 * other setup work (such as notifying the device driver). The reference 3095 * count is initialized to 1. 3096 */ 3097 static struct ifmultiaddr * 3098 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa, 3099 int mflags) 3100 { 3101 struct ifmultiaddr *ifma; 3102 struct sockaddr *dupsa; 3103 3104 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags | 3105 M_ZERO); 3106 if (ifma == NULL) 3107 return (NULL); 3108 3109 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags); 3110 if (dupsa == NULL) { 3111 free(ifma, M_IFMADDR); 3112 return (NULL); 3113 } 3114 bcopy(sa, dupsa, sa->sa_len); 3115 ifma->ifma_addr = dupsa; 3116 3117 ifma->ifma_ifp = ifp; 3118 ifma->ifma_refcount = 1; 3119 ifma->ifma_protospec = NULL; 3120 3121 if (llsa == NULL) { 3122 ifma->ifma_lladdr = NULL; 3123 return (ifma); 3124 } 3125 3126 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags); 3127 if (dupsa == NULL) { 3128 free(ifma->ifma_addr, M_IFMADDR); 3129 free(ifma, M_IFMADDR); 3130 return (NULL); 3131 } 3132 bcopy(llsa, dupsa, llsa->sa_len); 3133 ifma->ifma_lladdr = dupsa; 3134 3135 return (ifma); 3136 } 3137 3138 /* 3139 * if_freemulti: free ifmultiaddr structure and possibly attached related 3140 * addresses. The caller is responsible for implementing reference 3141 * counting, notifying the driver, handling routing messages, and releasing 3142 * any dependent link layer state. 3143 */ 3144 static void 3145 if_freemulti(struct ifmultiaddr *ifma) 3146 { 3147 3148 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d", 3149 ifma->ifma_refcount)); 3150 3151 if (ifma->ifma_lladdr != NULL) 3152 free(ifma->ifma_lladdr, M_IFMADDR); 3153 free(ifma->ifma_addr, M_IFMADDR); 3154 free(ifma, M_IFMADDR); 3155 } 3156 3157 /* 3158 * Register an additional multicast address with a network interface. 3159 * 3160 * - If the address is already present, bump the reference count on the 3161 * address and return. 3162 * - If the address is not link-layer, look up a link layer address. 3163 * - Allocate address structures for one or both addresses, and attach to the 3164 * multicast address list on the interface. If automatically adding a link 3165 * layer address, the protocol address will own a reference to the link 3166 * layer address, to be freed when it is freed. 3167 * - Notify the network device driver of an addition to the multicast address 3168 * list. 3169 * 3170 * 'sa' points to caller-owned memory with the desired multicast address. 3171 * 3172 * 'retifma' will be used to return a pointer to the resulting multicast 3173 * address reference, if desired. 3174 */ 3175 int 3176 if_addmulti(struct ifnet *ifp, struct sockaddr *sa, 3177 struct ifmultiaddr **retifma) 3178 { 3179 struct ifmultiaddr *ifma, *ll_ifma; 3180 struct sockaddr *llsa; 3181 struct sockaddr_dl sdl; 3182 int error; 3183 3184 /* 3185 * If the address is already present, return a new reference to it; 3186 * otherwise, allocate storage and set up a new address. 3187 */ 3188 IF_ADDR_WLOCK(ifp); 3189 ifma = if_findmulti(ifp, sa); 3190 if (ifma != NULL) { 3191 ifma->ifma_refcount++; 3192 if (retifma != NULL) 3193 *retifma = ifma; 3194 IF_ADDR_WUNLOCK(ifp); 3195 return (0); 3196 } 3197 3198 /* 3199 * The address isn't already present; resolve the protocol address 3200 * into a link layer address, and then look that up, bump its 3201 * refcount or allocate an ifma for that also. 3202 * Most link layer resolving functions returns address data which 3203 * fits inside default sockaddr_dl structure. However callback 3204 * can allocate another sockaddr structure, in that case we need to 3205 * free it later. 3206 */ 3207 llsa = NULL; 3208 ll_ifma = NULL; 3209 if (ifp->if_resolvemulti != NULL) { 3210 /* Provide called function with buffer size information */ 3211 sdl.sdl_len = sizeof(sdl); 3212 llsa = (struct sockaddr *)&sdl; 3213 error = ifp->if_resolvemulti(ifp, &llsa, sa); 3214 if (error) 3215 goto unlock_out; 3216 } 3217 3218 /* 3219 * Allocate the new address. Don't hook it up yet, as we may also 3220 * need to allocate a link layer multicast address. 3221 */ 3222 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT); 3223 if (ifma == NULL) { 3224 error = ENOMEM; 3225 goto free_llsa_out; 3226 } 3227 3228 /* 3229 * If a link layer address is found, we'll need to see if it's 3230 * already present in the address list, or allocate is as well. 3231 * When this block finishes, the link layer address will be on the 3232 * list. 3233 */ 3234 if (llsa != NULL) { 3235 ll_ifma = if_findmulti(ifp, llsa); 3236 if (ll_ifma == NULL) { 3237 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT); 3238 if (ll_ifma == NULL) { 3239 --ifma->ifma_refcount; 3240 if_freemulti(ifma); 3241 error = ENOMEM; 3242 goto free_llsa_out; 3243 } 3244 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma, 3245 ifma_link); 3246 } else 3247 ll_ifma->ifma_refcount++; 3248 ifma->ifma_llifma = ll_ifma; 3249 } 3250 3251 /* 3252 * We now have a new multicast address, ifma, and possibly a new or 3253 * referenced link layer address. Add the primary address to the 3254 * ifnet address list. 3255 */ 3256 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 3257 3258 if (retifma != NULL) 3259 *retifma = ifma; 3260 3261 /* 3262 * Must generate the message while holding the lock so that 'ifma' 3263 * pointer is still valid. 3264 */ 3265 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 3266 IF_ADDR_WUNLOCK(ifp); 3267 3268 /* 3269 * We are certain we have added something, so call down to the 3270 * interface to let them know about it. 3271 */ 3272 if (ifp->if_ioctl != NULL) { 3273 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0); 3274 } 3275 3276 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3277 link_free_sdl(llsa); 3278 3279 return (0); 3280 3281 free_llsa_out: 3282 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3283 link_free_sdl(llsa); 3284 3285 unlock_out: 3286 IF_ADDR_WUNLOCK(ifp); 3287 return (error); 3288 } 3289 3290 /* 3291 * Delete a multicast group membership by network-layer group address. 3292 * 3293 * Returns ENOENT if the entry could not be found. If ifp no longer 3294 * exists, results are undefined. This entry point should only be used 3295 * from subsystems which do appropriate locking to hold ifp for the 3296 * duration of the call. 3297 * Network-layer protocol domains must use if_delmulti_ifma(). 3298 */ 3299 int 3300 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 3301 { 3302 struct ifmultiaddr *ifma; 3303 int lastref; 3304 #ifdef INVARIANTS 3305 struct ifnet *oifp; 3306 3307 IFNET_RLOCK_NOSLEEP(); 3308 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3309 if (ifp == oifp) 3310 break; 3311 if (ifp != oifp) 3312 ifp = NULL; 3313 IFNET_RUNLOCK_NOSLEEP(); 3314 3315 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__)); 3316 #endif 3317 if (ifp == NULL) 3318 return (ENOENT); 3319 3320 IF_ADDR_WLOCK(ifp); 3321 lastref = 0; 3322 ifma = if_findmulti(ifp, sa); 3323 if (ifma != NULL) 3324 lastref = if_delmulti_locked(ifp, ifma, 0); 3325 IF_ADDR_WUNLOCK(ifp); 3326 3327 if (ifma == NULL) 3328 return (ENOENT); 3329 3330 if (lastref && ifp->if_ioctl != NULL) { 3331 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3332 } 3333 3334 return (0); 3335 } 3336 3337 /* 3338 * Delete all multicast group membership for an interface. 3339 * Should be used to quickly flush all multicast filters. 3340 */ 3341 void 3342 if_delallmulti(struct ifnet *ifp) 3343 { 3344 struct ifmultiaddr *ifma; 3345 struct ifmultiaddr *next; 3346 3347 IF_ADDR_WLOCK(ifp); 3348 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 3349 if_delmulti_locked(ifp, ifma, 0); 3350 IF_ADDR_WUNLOCK(ifp); 3351 } 3352 3353 /* 3354 * Delete a multicast group membership by group membership pointer. 3355 * Network-layer protocol domains must use this routine. 3356 * 3357 * It is safe to call this routine if the ifp disappeared. 3358 */ 3359 void 3360 if_delmulti_ifma(struct ifmultiaddr *ifma) 3361 { 3362 struct ifnet *ifp; 3363 int lastref; 3364 3365 ifp = ifma->ifma_ifp; 3366 #ifdef DIAGNOSTIC 3367 if (ifp == NULL) { 3368 printf("%s: ifma_ifp seems to be detached\n", __func__); 3369 } else { 3370 struct ifnet *oifp; 3371 3372 IFNET_RLOCK_NOSLEEP(); 3373 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3374 if (ifp == oifp) 3375 break; 3376 if (ifp != oifp) { 3377 printf("%s: ifnet %p disappeared\n", __func__, ifp); 3378 ifp = NULL; 3379 } 3380 IFNET_RUNLOCK_NOSLEEP(); 3381 } 3382 #endif 3383 /* 3384 * If and only if the ifnet instance exists: Acquire the address lock. 3385 */ 3386 if (ifp != NULL) 3387 IF_ADDR_WLOCK(ifp); 3388 3389 lastref = if_delmulti_locked(ifp, ifma, 0); 3390 3391 if (ifp != NULL) { 3392 /* 3393 * If and only if the ifnet instance exists: 3394 * Release the address lock. 3395 * If the group was left: update the hardware hash filter. 3396 */ 3397 IF_ADDR_WUNLOCK(ifp); 3398 if (lastref && ifp->if_ioctl != NULL) { 3399 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3400 } 3401 } 3402 } 3403 3404 /* 3405 * Perform deletion of network-layer and/or link-layer multicast address. 3406 * 3407 * Return 0 if the reference count was decremented. 3408 * Return 1 if the final reference was released, indicating that the 3409 * hardware hash filter should be reprogrammed. 3410 */ 3411 static int 3412 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching) 3413 { 3414 struct ifmultiaddr *ll_ifma; 3415 3416 if (ifp != NULL && ifma->ifma_ifp != NULL) { 3417 KASSERT(ifma->ifma_ifp == ifp, 3418 ("%s: inconsistent ifp %p", __func__, ifp)); 3419 IF_ADDR_WLOCK_ASSERT(ifp); 3420 } 3421 3422 ifp = ifma->ifma_ifp; 3423 3424 /* 3425 * If the ifnet is detaching, null out references to ifnet, 3426 * so that upper protocol layers will notice, and not attempt 3427 * to obtain locks for an ifnet which no longer exists. The 3428 * routing socket announcement must happen before the ifnet 3429 * instance is detached from the system. 3430 */ 3431 if (detaching) { 3432 #ifdef DIAGNOSTIC 3433 printf("%s: detaching ifnet instance %p\n", __func__, ifp); 3434 #endif 3435 /* 3436 * ifp may already be nulled out if we are being reentered 3437 * to delete the ll_ifma. 3438 */ 3439 if (ifp != NULL) { 3440 rt_newmaddrmsg(RTM_DELMADDR, ifma); 3441 ifma->ifma_ifp = NULL; 3442 } 3443 } 3444 3445 if (--ifma->ifma_refcount > 0) 3446 return 0; 3447 3448 /* 3449 * If this ifma is a network-layer ifma, a link-layer ifma may 3450 * have been associated with it. Release it first if so. 3451 */ 3452 ll_ifma = ifma->ifma_llifma; 3453 if (ll_ifma != NULL) { 3454 KASSERT(ifma->ifma_lladdr != NULL, 3455 ("%s: llifma w/o lladdr", __func__)); 3456 if (detaching) 3457 ll_ifma->ifma_ifp = NULL; /* XXX */ 3458 if (--ll_ifma->ifma_refcount == 0) { 3459 if (ifp != NULL) { 3460 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, 3461 ifma_link); 3462 } 3463 if_freemulti(ll_ifma); 3464 } 3465 } 3466 3467 if (ifp != NULL) 3468 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 3469 3470 if_freemulti(ifma); 3471 3472 /* 3473 * The last reference to this instance of struct ifmultiaddr 3474 * was released; the hardware should be notified of this change. 3475 */ 3476 return 1; 3477 } 3478 3479 /* 3480 * Set the link layer address on an interface. 3481 * 3482 * At this time we only support certain types of interfaces, 3483 * and we don't allow the length of the address to change. 3484 * 3485 * Set noinline to be dtrace-friendly 3486 */ 3487 __noinline int 3488 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 3489 { 3490 struct sockaddr_dl *sdl; 3491 struct ifaddr *ifa; 3492 struct ifreq ifr; 3493 3494 IF_ADDR_RLOCK(ifp); 3495 ifa = ifp->if_addr; 3496 if (ifa == NULL) { 3497 IF_ADDR_RUNLOCK(ifp); 3498 return (EINVAL); 3499 } 3500 ifa_ref(ifa); 3501 IF_ADDR_RUNLOCK(ifp); 3502 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 3503 if (sdl == NULL) { 3504 ifa_free(ifa); 3505 return (EINVAL); 3506 } 3507 if (len != sdl->sdl_alen) { /* don't allow length to change */ 3508 ifa_free(ifa); 3509 return (EINVAL); 3510 } 3511 switch (ifp->if_type) { 3512 case IFT_ETHER: 3513 case IFT_FDDI: 3514 case IFT_XETHER: 3515 case IFT_ISO88025: 3516 case IFT_L2VLAN: 3517 case IFT_BRIDGE: 3518 case IFT_ARCNET: 3519 case IFT_IEEE8023ADLAG: 3520 bcopy(lladdr, LLADDR(sdl), len); 3521 ifa_free(ifa); 3522 break; 3523 default: 3524 ifa_free(ifa); 3525 return (ENODEV); 3526 } 3527 3528 /* 3529 * If the interface is already up, we need 3530 * to re-init it in order to reprogram its 3531 * address filter. 3532 */ 3533 if ((ifp->if_flags & IFF_UP) != 0) { 3534 if (ifp->if_ioctl) { 3535 ifp->if_flags &= ~IFF_UP; 3536 ifr.ifr_flags = ifp->if_flags & 0xffff; 3537 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3538 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3539 ifp->if_flags |= IFF_UP; 3540 ifr.ifr_flags = ifp->if_flags & 0xffff; 3541 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3542 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3543 } 3544 } 3545 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 3546 return (0); 3547 } 3548 3549 /* 3550 * Compat function for handling basic encapsulation requests. 3551 * Not converted stacks (FDDI, IB, ..) supports traditional 3552 * output model: ARP (and other similar L2 protocols) are handled 3553 * inside output routine, arpresolve/nd6_resolve() returns MAC 3554 * address instead of full prepend. 3555 * 3556 * This function creates calculated header==MAC for IPv4/IPv6 and 3557 * returns EAFNOSUPPORT (which is then handled in ARP code) for other 3558 * address families. 3559 */ 3560 static int 3561 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req) 3562 { 3563 3564 if (req->rtype != IFENCAP_LL) 3565 return (EOPNOTSUPP); 3566 3567 if (req->bufsize < req->lladdr_len) 3568 return (ENOMEM); 3569 3570 switch (req->family) { 3571 case AF_INET: 3572 case AF_INET6: 3573 break; 3574 default: 3575 return (EAFNOSUPPORT); 3576 } 3577 3578 /* Copy lladdr to storage as is */ 3579 memmove(req->buf, req->lladdr, req->lladdr_len); 3580 req->bufsize = req->lladdr_len; 3581 req->lladdr_off = 0; 3582 3583 return (0); 3584 } 3585 3586 /* 3587 * The name argument must be a pointer to storage which will last as 3588 * long as the interface does. For physical devices, the result of 3589 * device_get_name(dev) is a good choice and for pseudo-devices a 3590 * static string works well. 3591 */ 3592 void 3593 if_initname(struct ifnet *ifp, const char *name, int unit) 3594 { 3595 ifp->if_dname = name; 3596 ifp->if_dunit = unit; 3597 if (unit != IF_DUNIT_NONE) 3598 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 3599 else 3600 strlcpy(ifp->if_xname, name, IFNAMSIZ); 3601 } 3602 3603 int 3604 if_printf(struct ifnet *ifp, const char * fmt, ...) 3605 { 3606 va_list ap; 3607 int retval; 3608 3609 retval = printf("%s: ", ifp->if_xname); 3610 va_start(ap, fmt); 3611 retval += vprintf(fmt, ap); 3612 va_end(ap); 3613 return (retval); 3614 } 3615 3616 void 3617 if_start(struct ifnet *ifp) 3618 { 3619 3620 (*(ifp)->if_start)(ifp); 3621 } 3622 3623 /* 3624 * Backwards compatibility interface for drivers 3625 * that have not implemented it 3626 */ 3627 static int 3628 if_transmit(struct ifnet *ifp, struct mbuf *m) 3629 { 3630 int error; 3631 3632 IFQ_HANDOFF(ifp, m, error); 3633 return (error); 3634 } 3635 3636 static void 3637 if_input_default(struct ifnet *ifp __unused, struct mbuf *m) 3638 { 3639 3640 m_freem(m); 3641 } 3642 3643 int 3644 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust) 3645 { 3646 int active = 0; 3647 3648 IF_LOCK(ifq); 3649 if (_IF_QFULL(ifq)) { 3650 IF_UNLOCK(ifq); 3651 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1); 3652 m_freem(m); 3653 return (0); 3654 } 3655 if (ifp != NULL) { 3656 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust); 3657 if (m->m_flags & (M_BCAST|M_MCAST)) 3658 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 3659 active = ifp->if_drv_flags & IFF_DRV_OACTIVE; 3660 } 3661 _IF_ENQUEUE(ifq, m); 3662 IF_UNLOCK(ifq); 3663 if (ifp != NULL && !active) 3664 (*(ifp)->if_start)(ifp); 3665 return (1); 3666 } 3667 3668 void 3669 if_register_com_alloc(u_char type, 3670 if_com_alloc_t *a, if_com_free_t *f) 3671 { 3672 3673 KASSERT(if_com_alloc[type] == NULL, 3674 ("if_register_com_alloc: %d already registered", type)); 3675 KASSERT(if_com_free[type] == NULL, 3676 ("if_register_com_alloc: %d free already registered", type)); 3677 3678 if_com_alloc[type] = a; 3679 if_com_free[type] = f; 3680 } 3681 3682 void 3683 if_deregister_com_alloc(u_char type) 3684 { 3685 3686 KASSERT(if_com_alloc[type] != NULL, 3687 ("if_deregister_com_alloc: %d not registered", type)); 3688 KASSERT(if_com_free[type] != NULL, 3689 ("if_deregister_com_alloc: %d free not registered", type)); 3690 if_com_alloc[type] = NULL; 3691 if_com_free[type] = NULL; 3692 } 3693 3694 /* API for driver access to network stack owned ifnet.*/ 3695 uint64_t 3696 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate) 3697 { 3698 uint64_t oldbrate; 3699 3700 oldbrate = ifp->if_baudrate; 3701 ifp->if_baudrate = baudrate; 3702 return (oldbrate); 3703 } 3704 3705 uint64_t 3706 if_getbaudrate(if_t ifp) 3707 { 3708 3709 return (((struct ifnet *)ifp)->if_baudrate); 3710 } 3711 3712 int 3713 if_setcapabilities(if_t ifp, int capabilities) 3714 { 3715 ((struct ifnet *)ifp)->if_capabilities = capabilities; 3716 return (0); 3717 } 3718 3719 int 3720 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit) 3721 { 3722 ((struct ifnet *)ifp)->if_capabilities |= setbit; 3723 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit; 3724 3725 return (0); 3726 } 3727 3728 int 3729 if_getcapabilities(if_t ifp) 3730 { 3731 return ((struct ifnet *)ifp)->if_capabilities; 3732 } 3733 3734 int 3735 if_setcapenable(if_t ifp, int capabilities) 3736 { 3737 ((struct ifnet *)ifp)->if_capenable = capabilities; 3738 return (0); 3739 } 3740 3741 int 3742 if_setcapenablebit(if_t ifp, int setcap, int clearcap) 3743 { 3744 if(setcap) 3745 ((struct ifnet *)ifp)->if_capenable |= setcap; 3746 if(clearcap) 3747 ((struct ifnet *)ifp)->if_capenable &= ~clearcap; 3748 3749 return (0); 3750 } 3751 3752 const char * 3753 if_getdname(if_t ifp) 3754 { 3755 return ((struct ifnet *)ifp)->if_dname; 3756 } 3757 3758 int 3759 if_togglecapenable(if_t ifp, int togglecap) 3760 { 3761 ((struct ifnet *)ifp)->if_capenable ^= togglecap; 3762 return (0); 3763 } 3764 3765 int 3766 if_getcapenable(if_t ifp) 3767 { 3768 return ((struct ifnet *)ifp)->if_capenable; 3769 } 3770 3771 /* 3772 * This is largely undesirable because it ties ifnet to a device, but does 3773 * provide flexiblity for an embedded product vendor. Should be used with 3774 * the understanding that it violates the interface boundaries, and should be 3775 * a last resort only. 3776 */ 3777 int 3778 if_setdev(if_t ifp, void *dev) 3779 { 3780 return (0); 3781 } 3782 3783 int 3784 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags) 3785 { 3786 ((struct ifnet *)ifp)->if_drv_flags |= set_flags; 3787 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags; 3788 3789 return (0); 3790 } 3791 3792 int 3793 if_getdrvflags(if_t ifp) 3794 { 3795 return ((struct ifnet *)ifp)->if_drv_flags; 3796 } 3797 3798 int 3799 if_setdrvflags(if_t ifp, int flags) 3800 { 3801 ((struct ifnet *)ifp)->if_drv_flags = flags; 3802 return (0); 3803 } 3804 3805 3806 int 3807 if_setflags(if_t ifp, int flags) 3808 { 3809 ((struct ifnet *)ifp)->if_flags = flags; 3810 return (0); 3811 } 3812 3813 int 3814 if_setflagbits(if_t ifp, int set, int clear) 3815 { 3816 ((struct ifnet *)ifp)->if_flags |= set; 3817 ((struct ifnet *)ifp)->if_flags &= ~clear; 3818 3819 return (0); 3820 } 3821 3822 int 3823 if_getflags(if_t ifp) 3824 { 3825 return ((struct ifnet *)ifp)->if_flags; 3826 } 3827 3828 int 3829 if_clearhwassist(if_t ifp) 3830 { 3831 ((struct ifnet *)ifp)->if_hwassist = 0; 3832 return (0); 3833 } 3834 3835 int 3836 if_sethwassistbits(if_t ifp, int toset, int toclear) 3837 { 3838 ((struct ifnet *)ifp)->if_hwassist |= toset; 3839 ((struct ifnet *)ifp)->if_hwassist &= ~toclear; 3840 3841 return (0); 3842 } 3843 3844 int 3845 if_sethwassist(if_t ifp, int hwassist_bit) 3846 { 3847 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit; 3848 return (0); 3849 } 3850 3851 int 3852 if_gethwassist(if_t ifp) 3853 { 3854 return ((struct ifnet *)ifp)->if_hwassist; 3855 } 3856 3857 int 3858 if_setmtu(if_t ifp, int mtu) 3859 { 3860 ((struct ifnet *)ifp)->if_mtu = mtu; 3861 return (0); 3862 } 3863 3864 int 3865 if_getmtu(if_t ifp) 3866 { 3867 return ((struct ifnet *)ifp)->if_mtu; 3868 } 3869 3870 int 3871 if_getmtu_family(if_t ifp, int family) 3872 { 3873 struct domain *dp; 3874 3875 for (dp = domains; dp; dp = dp->dom_next) { 3876 if (dp->dom_family == family && dp->dom_ifmtu != NULL) 3877 return (dp->dom_ifmtu((struct ifnet *)ifp)); 3878 } 3879 3880 return (((struct ifnet *)ifp)->if_mtu); 3881 } 3882 3883 int 3884 if_setsoftc(if_t ifp, void *softc) 3885 { 3886 ((struct ifnet *)ifp)->if_softc = softc; 3887 return (0); 3888 } 3889 3890 void * 3891 if_getsoftc(if_t ifp) 3892 { 3893 return ((struct ifnet *)ifp)->if_softc; 3894 } 3895 3896 void 3897 if_setrcvif(struct mbuf *m, if_t ifp) 3898 { 3899 m->m_pkthdr.rcvif = (struct ifnet *)ifp; 3900 } 3901 3902 void 3903 if_setvtag(struct mbuf *m, uint16_t tag) 3904 { 3905 m->m_pkthdr.ether_vtag = tag; 3906 } 3907 3908 uint16_t 3909 if_getvtag(struct mbuf *m) 3910 { 3911 3912 return (m->m_pkthdr.ether_vtag); 3913 } 3914 3915 int 3916 if_sendq_empty(if_t ifp) 3917 { 3918 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd); 3919 } 3920 3921 struct ifaddr * 3922 if_getifaddr(if_t ifp) 3923 { 3924 return ((struct ifnet *)ifp)->if_addr; 3925 } 3926 3927 int 3928 if_getamcount(if_t ifp) 3929 { 3930 return ((struct ifnet *)ifp)->if_amcount; 3931 } 3932 3933 3934 int 3935 if_setsendqready(if_t ifp) 3936 { 3937 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd); 3938 return (0); 3939 } 3940 3941 int 3942 if_setsendqlen(if_t ifp, int tx_desc_count) 3943 { 3944 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count); 3945 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count; 3946 3947 return (0); 3948 } 3949 3950 int 3951 if_vlantrunkinuse(if_t ifp) 3952 { 3953 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0; 3954 } 3955 3956 int 3957 if_input(if_t ifp, struct mbuf* sendmp) 3958 { 3959 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp); 3960 return (0); 3961 3962 } 3963 3964 /* XXX */ 3965 #ifndef ETH_ADDR_LEN 3966 #define ETH_ADDR_LEN 6 3967 #endif 3968 3969 int 3970 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max) 3971 { 3972 struct ifmultiaddr *ifma; 3973 uint8_t *lmta = (uint8_t *)mta; 3974 int mcnt = 0; 3975 3976 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 3977 if (ifma->ifma_addr->sa_family != AF_LINK) 3978 continue; 3979 3980 if (mcnt == max) 3981 break; 3982 3983 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 3984 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN); 3985 mcnt++; 3986 } 3987 *cnt = mcnt; 3988 3989 return (0); 3990 } 3991 3992 int 3993 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max) 3994 { 3995 int error; 3996 3997 if_maddr_rlock(ifp); 3998 error = if_setupmultiaddr(ifp, mta, cnt, max); 3999 if_maddr_runlock(ifp); 4000 return (error); 4001 } 4002 4003 int 4004 if_multiaddr_count(if_t ifp, int max) 4005 { 4006 struct ifmultiaddr *ifma; 4007 int count; 4008 4009 count = 0; 4010 if_maddr_rlock(ifp); 4011 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 4012 if (ifma->ifma_addr->sa_family != AF_LINK) 4013 continue; 4014 count++; 4015 if (count == max) 4016 break; 4017 } 4018 if_maddr_runlock(ifp); 4019 return (count); 4020 } 4021 4022 int 4023 if_multi_apply(struct ifnet *ifp, int (*filter)(void *, struct ifmultiaddr *, int), void *arg) 4024 { 4025 struct ifmultiaddr *ifma; 4026 int cnt = 0; 4027 4028 if_maddr_rlock(ifp); 4029 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 4030 cnt += filter(arg, ifma, cnt); 4031 if_maddr_runlock(ifp); 4032 return (cnt); 4033 } 4034 4035 struct mbuf * 4036 if_dequeue(if_t ifp) 4037 { 4038 struct mbuf *m; 4039 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m); 4040 4041 return (m); 4042 } 4043 4044 int 4045 if_sendq_prepend(if_t ifp, struct mbuf *m) 4046 { 4047 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m); 4048 return (0); 4049 } 4050 4051 int 4052 if_setifheaderlen(if_t ifp, int len) 4053 { 4054 ((struct ifnet *)ifp)->if_hdrlen = len; 4055 return (0); 4056 } 4057 4058 caddr_t 4059 if_getlladdr(if_t ifp) 4060 { 4061 return (IF_LLADDR((struct ifnet *)ifp)); 4062 } 4063 4064 void * 4065 if_gethandle(u_char type) 4066 { 4067 return (if_alloc(type)); 4068 } 4069 4070 void 4071 if_bpfmtap(if_t ifh, struct mbuf *m) 4072 { 4073 struct ifnet *ifp = (struct ifnet *)ifh; 4074 4075 BPF_MTAP(ifp, m); 4076 } 4077 4078 void 4079 if_etherbpfmtap(if_t ifh, struct mbuf *m) 4080 { 4081 struct ifnet *ifp = (struct ifnet *)ifh; 4082 4083 ETHER_BPF_MTAP(ifp, m); 4084 } 4085 4086 void 4087 if_vlancap(if_t ifh) 4088 { 4089 struct ifnet *ifp = (struct ifnet *)ifh; 4090 VLAN_CAPABILITIES(ifp); 4091 } 4092 4093 int 4094 if_sethwtsomax(if_t ifp, u_int if_hw_tsomax) 4095 { 4096 4097 ((struct ifnet *)ifp)->if_hw_tsomax = if_hw_tsomax; 4098 return (0); 4099 } 4100 4101 int 4102 if_sethwtsomaxsegcount(if_t ifp, u_int if_hw_tsomaxsegcount) 4103 { 4104 4105 ((struct ifnet *)ifp)->if_hw_tsomaxsegcount = if_hw_tsomaxsegcount; 4106 return (0); 4107 } 4108 4109 int 4110 if_sethwtsomaxsegsize(if_t ifp, u_int if_hw_tsomaxsegsize) 4111 { 4112 4113 ((struct ifnet *)ifp)->if_hw_tsomaxsegsize = if_hw_tsomaxsegsize; 4114 return (0); 4115 } 4116 4117 u_int 4118 if_gethwtsomax(if_t ifp) 4119 { 4120 4121 return (((struct ifnet *)ifp)->if_hw_tsomax); 4122 } 4123 4124 u_int 4125 if_gethwtsomaxsegcount(if_t ifp) 4126 { 4127 4128 return (((struct ifnet *)ifp)->if_hw_tsomaxsegcount); 4129 } 4130 4131 u_int 4132 if_gethwtsomaxsegsize(if_t ifp) 4133 { 4134 4135 return (((struct ifnet *)ifp)->if_hw_tsomaxsegsize); 4136 } 4137 4138 void 4139 if_setinitfn(if_t ifp, void (*init_fn)(void *)) 4140 { 4141 ((struct ifnet *)ifp)->if_init = init_fn; 4142 } 4143 4144 void 4145 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t)) 4146 { 4147 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn; 4148 } 4149 4150 void 4151 if_setstartfn(if_t ifp, void (*start_fn)(if_t)) 4152 { 4153 ((struct ifnet *)ifp)->if_start = (void *)start_fn; 4154 } 4155 4156 void 4157 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn) 4158 { 4159 ((struct ifnet *)ifp)->if_transmit = start_fn; 4160 } 4161 4162 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn) 4163 { 4164 ((struct ifnet *)ifp)->if_qflush = flush_fn; 4165 4166 } 4167 4168 void 4169 if_setgetcounterfn(if_t ifp, if_get_counter_t fn) 4170 { 4171 4172 ifp->if_get_counter = fn; 4173 } 4174 4175 /* Revisit these - These are inline functions originally. */ 4176 int 4177 drbr_inuse_drv(if_t ifh, struct buf_ring *br) 4178 { 4179 return drbr_inuse(ifh, br); 4180 } 4181 4182 struct mbuf* 4183 drbr_dequeue_drv(if_t ifh, struct buf_ring *br) 4184 { 4185 return drbr_dequeue(ifh, br); 4186 } 4187 4188 int 4189 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br) 4190 { 4191 return drbr_needs_enqueue(ifh, br); 4192 } 4193 4194 int 4195 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m) 4196 { 4197 return drbr_enqueue(ifh, br, m); 4198 4199 } 4200