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 (ifp->if_type == IFT_ETHER) { 748 ifp->if_hw_addr = malloc(ifp->if_addrlen, M_IFADDR, 749 M_WAITOK | M_ZERO); 750 } 751 752 #if defined(INET) || defined(INET6) 753 /* Use defaults for TSO, if nothing is set */ 754 if (ifp->if_hw_tsomax == 0 && 755 ifp->if_hw_tsomaxsegcount == 0 && 756 ifp->if_hw_tsomaxsegsize == 0) { 757 /* 758 * The TSO defaults needs to be such that an 759 * NFS mbuf list of 35 mbufs totalling just 760 * below 64K works and that a chain of mbufs 761 * can be defragged into at most 32 segments: 762 */ 763 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) - 764 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN)); 765 ifp->if_hw_tsomaxsegcount = 35; 766 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */ 767 768 /* XXX some drivers set IFCAP_TSO after ethernet attach */ 769 if (ifp->if_capabilities & IFCAP_TSO) { 770 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n", 771 ifp->if_hw_tsomax, 772 ifp->if_hw_tsomaxsegcount, 773 ifp->if_hw_tsomaxsegsize); 774 } 775 } 776 #endif 777 } 778 #ifdef VIMAGE 779 else { 780 /* 781 * Update the interface index in the link layer address 782 * of the interface. 783 */ 784 for (ifa = ifp->if_addr; ifa != NULL; 785 ifa = TAILQ_NEXT(ifa, ifa_link)) { 786 if (ifa->ifa_addr->sa_family == AF_LINK) { 787 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 788 sdl->sdl_index = ifp->if_index; 789 } 790 } 791 } 792 #endif 793 794 IFNET_WLOCK(); 795 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link); 796 #ifdef VIMAGE 797 curvnet->vnet_ifcnt++; 798 #endif 799 IFNET_WUNLOCK(); 800 801 if (domain_init_status >= 2) 802 if_attachdomain1(ifp); 803 804 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 805 if (IS_DEFAULT_VNET(curvnet)) 806 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 807 808 /* Announce the interface. */ 809 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 810 } 811 812 static void 813 if_attachdomain(void *dummy) 814 { 815 struct ifnet *ifp; 816 817 TAILQ_FOREACH(ifp, &V_ifnet, if_link) 818 if_attachdomain1(ifp); 819 } 820 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND, 821 if_attachdomain, NULL); 822 823 static void 824 if_attachdomain1(struct ifnet *ifp) 825 { 826 struct domain *dp; 827 828 /* 829 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we 830 * cannot lock ifp->if_afdata initialization, entirely. 831 */ 832 IF_AFDATA_LOCK(ifp); 833 if (ifp->if_afdata_initialized >= domain_init_status) { 834 IF_AFDATA_UNLOCK(ifp); 835 log(LOG_WARNING, "%s called more than once on %s\n", 836 __func__, ifp->if_xname); 837 return; 838 } 839 ifp->if_afdata_initialized = domain_init_status; 840 IF_AFDATA_UNLOCK(ifp); 841 842 /* address family dependent data region */ 843 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 844 for (dp = domains; dp; dp = dp->dom_next) { 845 if (dp->dom_ifattach) 846 ifp->if_afdata[dp->dom_family] = 847 (*dp->dom_ifattach)(ifp); 848 } 849 } 850 851 /* 852 * Remove any unicast or broadcast network addresses from an interface. 853 */ 854 void 855 if_purgeaddrs(struct ifnet *ifp) 856 { 857 struct ifaddr *ifa, *next; 858 859 /* XXX cannot hold IF_ADDR_WLOCK over called functions. */ 860 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) { 861 if (ifa->ifa_addr->sa_family == AF_LINK) 862 continue; 863 #ifdef INET 864 /* XXX: Ugly!! ad hoc just for INET */ 865 if (ifa->ifa_addr->sa_family == AF_INET) { 866 struct ifaliasreq ifr; 867 868 bzero(&ifr, sizeof(ifr)); 869 ifr.ifra_addr = *ifa->ifa_addr; 870 if (ifa->ifa_dstaddr) 871 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 872 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 873 NULL) == 0) 874 continue; 875 } 876 #endif /* INET */ 877 #ifdef INET6 878 if (ifa->ifa_addr->sa_family == AF_INET6) { 879 in6_purgeaddr(ifa); 880 /* ifp_addrhead is already updated */ 881 continue; 882 } 883 #endif /* INET6 */ 884 IF_ADDR_WLOCK(ifp); 885 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 886 IF_ADDR_WUNLOCK(ifp); 887 ifa_free(ifa); 888 } 889 } 890 891 /* 892 * Remove any multicast network addresses from an interface when an ifnet 893 * is going away. 894 */ 895 static void 896 if_purgemaddrs(struct ifnet *ifp) 897 { 898 struct ifmultiaddr *ifma; 899 struct ifmultiaddr *next; 900 901 IF_ADDR_WLOCK(ifp); 902 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 903 if_delmulti_locked(ifp, ifma, 1); 904 IF_ADDR_WUNLOCK(ifp); 905 } 906 907 /* 908 * Detach an interface, removing it from the list of "active" interfaces. 909 * If vmove flag is set on entry to if_detach_internal(), perform only a 910 * limited subset of cleanup tasks, given that we are moving an ifnet from 911 * one vnet to another, where it must be fully operational. 912 * 913 * XXXRW: There are some significant questions about event ordering, and 914 * how to prevent things from starting to use the interface during detach. 915 */ 916 void 917 if_detach(struct ifnet *ifp) 918 { 919 920 CURVNET_SET_QUIET(ifp->if_vnet); 921 if_detach_internal(ifp, 0, NULL); 922 CURVNET_RESTORE(); 923 } 924 925 /* 926 * The vmove flag, if set, indicates that we are called from a callpath 927 * that is moving an interface to a different vnet instance. 928 * 929 * The shutdown flag, if set, indicates that we are called in the 930 * process of shutting down a vnet instance. Currently only the 931 * vnet_if_return SYSUNINIT function sets it. Note: we can be called 932 * on a vnet instance shutdown without this flag being set, e.g., when 933 * the cloned interfaces are destoyed as first thing of teardown. 934 */ 935 static int 936 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp) 937 { 938 struct ifaddr *ifa; 939 int i; 940 struct domain *dp; 941 struct ifnet *iter; 942 int found = 0; 943 #ifdef VIMAGE 944 int shutdown; 945 946 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET && 947 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0; 948 #endif 949 IFNET_WLOCK(); 950 TAILQ_FOREACH(iter, &V_ifnet, if_link) 951 if (iter == ifp) { 952 TAILQ_REMOVE(&V_ifnet, ifp, if_link); 953 found = 1; 954 break; 955 } 956 IFNET_WUNLOCK(); 957 if (!found) { 958 /* 959 * While we would want to panic here, we cannot 960 * guarantee that the interface is indeed still on 961 * the list given we don't hold locks all the way. 962 */ 963 return (ENOENT); 964 #if 0 965 if (vmove) 966 panic("%s: ifp=%p not on the ifnet tailq %p", 967 __func__, ifp, &V_ifnet); 968 else 969 return; /* XXX this should panic as well? */ 970 #endif 971 } 972 973 /* 974 * At this point we know the interface still was on the ifnet list 975 * and we removed it so we are in a stable state. 976 */ 977 #ifdef VIMAGE 978 curvnet->vnet_ifcnt--; 979 #endif 980 981 /* 982 * In any case (destroy or vmove) detach us from the groups 983 * and remove/wait for pending events on the taskq. 984 * XXX-BZ in theory an interface could still enqueue a taskq change? 985 */ 986 if_delgroups(ifp); 987 988 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 989 990 /* 991 * Check if this is a cloned interface or not. Must do even if 992 * shutting down as a if_vmove_reclaim() would move the ifp and 993 * the if_clone_addgroup() will have a corrupted string overwise 994 * from a gibberish pointer. 995 */ 996 if (vmove && ifcp != NULL) 997 *ifcp = if_clone_findifc(ifp); 998 999 if_down(ifp); 1000 1001 #ifdef VIMAGE 1002 /* 1003 * On VNET shutdown abort here as the stack teardown will do all 1004 * the work top-down for us. 1005 */ 1006 if (shutdown) { 1007 /* 1008 * In case of a vmove we are done here without error. 1009 * If we would signal an error it would lead to the same 1010 * abort as if we did not find the ifnet anymore. 1011 * if_detach() calls us in void context and does not care 1012 * about an early abort notification, so life is splendid :) 1013 */ 1014 goto finish_vnet_shutdown; 1015 } 1016 #endif 1017 1018 /* 1019 * At this point we are not tearing down a VNET and are either 1020 * going to destroy or vmove the interface and have to cleanup 1021 * accordingly. 1022 */ 1023 1024 /* 1025 * Remove routes and flush queues. 1026 */ 1027 #ifdef ALTQ 1028 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 1029 altq_disable(&ifp->if_snd); 1030 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 1031 altq_detach(&ifp->if_snd); 1032 #endif 1033 1034 if_purgeaddrs(ifp); 1035 1036 #ifdef INET 1037 in_ifdetach(ifp); 1038 #endif 1039 1040 #ifdef INET6 1041 /* 1042 * Remove all IPv6 kernel structs related to ifp. This should be done 1043 * before removing routing entries below, since IPv6 interface direct 1044 * routes are expected to be removed by the IPv6-specific kernel API. 1045 * Otherwise, the kernel will detect some inconsistency and bark it. 1046 */ 1047 in6_ifdetach(ifp); 1048 #endif 1049 if_purgemaddrs(ifp); 1050 1051 /* Announce that the interface is gone. */ 1052 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 1053 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 1054 if (IS_DEFAULT_VNET(curvnet)) 1055 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 1056 1057 if (!vmove) { 1058 /* 1059 * Prevent further calls into the device driver via ifnet. 1060 */ 1061 if_dead(ifp); 1062 1063 /* 1064 * Remove link ifaddr pointer and maybe decrement if_index. 1065 * Clean up all addresses. 1066 */ 1067 free(ifp->if_hw_addr, M_IFADDR); 1068 ifp->if_hw_addr = NULL; 1069 ifp->if_addr = NULL; 1070 1071 /* We can now free link ifaddr. */ 1072 IF_ADDR_WLOCK(ifp); 1073 if (!TAILQ_EMPTY(&ifp->if_addrhead)) { 1074 ifa = TAILQ_FIRST(&ifp->if_addrhead); 1075 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 1076 IF_ADDR_WUNLOCK(ifp); 1077 ifa_free(ifa); 1078 } else 1079 IF_ADDR_WUNLOCK(ifp); 1080 } 1081 1082 rt_flushifroutes(ifp); 1083 1084 #ifdef VIMAGE 1085 finish_vnet_shutdown: 1086 #endif 1087 /* 1088 * We cannot hold the lock over dom_ifdetach calls as they might 1089 * sleep, for example trying to drain a callout, thus open up the 1090 * theoretical race with re-attaching. 1091 */ 1092 IF_AFDATA_LOCK(ifp); 1093 i = ifp->if_afdata_initialized; 1094 ifp->if_afdata_initialized = 0; 1095 IF_AFDATA_UNLOCK(ifp); 1096 for (dp = domains; i > 0 && dp; dp = dp->dom_next) { 1097 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) { 1098 (*dp->dom_ifdetach)(ifp, 1099 ifp->if_afdata[dp->dom_family]); 1100 ifp->if_afdata[dp->dom_family] = NULL; 1101 } 1102 } 1103 1104 return (0); 1105 } 1106 1107 #ifdef VIMAGE 1108 /* 1109 * if_vmove() performs a limited version of if_detach() in current 1110 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg. 1111 * An attempt is made to shrink if_index in current vnet, find an 1112 * unused if_index in target vnet and calls if_grow() if necessary, 1113 * and finally find an unused if_xname for the target vnet. 1114 */ 1115 static void 1116 if_vmove(struct ifnet *ifp, struct vnet *new_vnet) 1117 { 1118 struct if_clone *ifc; 1119 u_int bif_dlt, bif_hdrlen; 1120 int rc; 1121 1122 /* 1123 * if_detach_internal() will call the eventhandler to notify 1124 * interface departure. That will detach if_bpf. We need to 1125 * safe the dlt and hdrlen so we can re-attach it later. 1126 */ 1127 bpf_get_bp_params(ifp->if_bpf, &bif_dlt, &bif_hdrlen); 1128 1129 /* 1130 * Detach from current vnet, but preserve LLADDR info, do not 1131 * mark as dead etc. so that the ifnet can be reattached later. 1132 * If we cannot find it, we lost the race to someone else. 1133 */ 1134 rc = if_detach_internal(ifp, 1, &ifc); 1135 if (rc != 0) 1136 return; 1137 1138 /* 1139 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink 1140 * the if_index for that vnet if possible. 1141 * 1142 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized, 1143 * or we'd lock on one vnet and unlock on another. 1144 */ 1145 IFNET_WLOCK(); 1146 ifindex_free_locked(ifp->if_index); 1147 IFNET_WUNLOCK(); 1148 1149 /* 1150 * Perform interface-specific reassignment tasks, if provided by 1151 * the driver. 1152 */ 1153 if (ifp->if_reassign != NULL) 1154 ifp->if_reassign(ifp, new_vnet, NULL); 1155 1156 /* 1157 * Switch to the context of the target vnet. 1158 */ 1159 CURVNET_SET_QUIET(new_vnet); 1160 1161 IFNET_WLOCK(); 1162 ifp->if_index = ifindex_alloc(); 1163 ifnet_setbyindex_locked(ifp->if_index, ifp); 1164 IFNET_WUNLOCK(); 1165 1166 if_attach_internal(ifp, 1, ifc); 1167 1168 if (ifp->if_bpf == NULL) 1169 bpfattach(ifp, bif_dlt, bif_hdrlen); 1170 1171 CURVNET_RESTORE(); 1172 } 1173 1174 /* 1175 * Move an ifnet to or from another child prison/vnet, specified by the jail id. 1176 */ 1177 static int 1178 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid) 1179 { 1180 struct prison *pr; 1181 struct ifnet *difp; 1182 int shutdown; 1183 1184 /* Try to find the prison within our visibility. */ 1185 sx_slock(&allprison_lock); 1186 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1187 sx_sunlock(&allprison_lock); 1188 if (pr == NULL) 1189 return (ENXIO); 1190 prison_hold_locked(pr); 1191 mtx_unlock(&pr->pr_mtx); 1192 1193 /* Do not try to move the iface from and to the same prison. */ 1194 if (pr->pr_vnet == ifp->if_vnet) { 1195 prison_free(pr); 1196 return (EEXIST); 1197 } 1198 1199 /* Make sure the named iface does not exists in the dst. prison/vnet. */ 1200 /* XXX Lock interfaces to avoid races. */ 1201 CURVNET_SET_QUIET(pr->pr_vnet); 1202 difp = ifunit(ifname); 1203 if (difp != NULL) { 1204 CURVNET_RESTORE(); 1205 prison_free(pr); 1206 return (EEXIST); 1207 } 1208 1209 /* Make sure the VNET is stable. */ 1210 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET && 1211 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0; 1212 if (shutdown) { 1213 CURVNET_RESTORE(); 1214 prison_free(pr); 1215 return (EBUSY); 1216 } 1217 CURVNET_RESTORE(); 1218 1219 /* Move the interface into the child jail/vnet. */ 1220 if_vmove(ifp, pr->pr_vnet); 1221 1222 /* Report the new if_xname back to the userland. */ 1223 sprintf(ifname, "%s", ifp->if_xname); 1224 1225 prison_free(pr); 1226 return (0); 1227 } 1228 1229 static int 1230 if_vmove_reclaim(struct thread *td, char *ifname, int jid) 1231 { 1232 struct prison *pr; 1233 struct vnet *vnet_dst; 1234 struct ifnet *ifp; 1235 int shutdown; 1236 1237 /* Try to find the prison within our visibility. */ 1238 sx_slock(&allprison_lock); 1239 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1240 sx_sunlock(&allprison_lock); 1241 if (pr == NULL) 1242 return (ENXIO); 1243 prison_hold_locked(pr); 1244 mtx_unlock(&pr->pr_mtx); 1245 1246 /* Make sure the named iface exists in the source prison/vnet. */ 1247 CURVNET_SET(pr->pr_vnet); 1248 ifp = ifunit(ifname); /* XXX Lock to avoid races. */ 1249 if (ifp == NULL) { 1250 CURVNET_RESTORE(); 1251 prison_free(pr); 1252 return (ENXIO); 1253 } 1254 1255 /* Do not try to move the iface from and to the same prison. */ 1256 vnet_dst = TD_TO_VNET(td); 1257 if (vnet_dst == ifp->if_vnet) { 1258 CURVNET_RESTORE(); 1259 prison_free(pr); 1260 return (EEXIST); 1261 } 1262 1263 /* Make sure the VNET is stable. */ 1264 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET && 1265 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0; 1266 if (shutdown) { 1267 CURVNET_RESTORE(); 1268 prison_free(pr); 1269 return (EBUSY); 1270 } 1271 1272 /* Get interface back from child jail/vnet. */ 1273 if_vmove(ifp, vnet_dst); 1274 CURVNET_RESTORE(); 1275 1276 /* Report the new if_xname back to the userland. */ 1277 sprintf(ifname, "%s", ifp->if_xname); 1278 1279 prison_free(pr); 1280 return (0); 1281 } 1282 #endif /* VIMAGE */ 1283 1284 /* 1285 * Add a group to an interface 1286 */ 1287 int 1288 if_addgroup(struct ifnet *ifp, const char *groupname) 1289 { 1290 struct ifg_list *ifgl; 1291 struct ifg_group *ifg = NULL; 1292 struct ifg_member *ifgm; 1293 int new = 0; 1294 1295 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 1296 groupname[strlen(groupname) - 1] <= '9') 1297 return (EINVAL); 1298 1299 IFNET_WLOCK(); 1300 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1301 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) { 1302 IFNET_WUNLOCK(); 1303 return (EEXIST); 1304 } 1305 1306 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP, 1307 M_NOWAIT)) == NULL) { 1308 IFNET_WUNLOCK(); 1309 return (ENOMEM); 1310 } 1311 1312 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member), 1313 M_TEMP, M_NOWAIT)) == NULL) { 1314 free(ifgl, M_TEMP); 1315 IFNET_WUNLOCK(); 1316 return (ENOMEM); 1317 } 1318 1319 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1320 if (!strcmp(ifg->ifg_group, groupname)) 1321 break; 1322 1323 if (ifg == NULL) { 1324 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group), 1325 M_TEMP, M_NOWAIT)) == NULL) { 1326 free(ifgl, M_TEMP); 1327 free(ifgm, M_TEMP); 1328 IFNET_WUNLOCK(); 1329 return (ENOMEM); 1330 } 1331 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 1332 ifg->ifg_refcnt = 0; 1333 TAILQ_INIT(&ifg->ifg_members); 1334 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next); 1335 new = 1; 1336 } 1337 1338 ifg->ifg_refcnt++; 1339 ifgl->ifgl_group = ifg; 1340 ifgm->ifgm_ifp = ifp; 1341 1342 IF_ADDR_WLOCK(ifp); 1343 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 1344 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 1345 IF_ADDR_WUNLOCK(ifp); 1346 1347 IFNET_WUNLOCK(); 1348 1349 if (new) 1350 EVENTHANDLER_INVOKE(group_attach_event, ifg); 1351 EVENTHANDLER_INVOKE(group_change_event, groupname); 1352 1353 return (0); 1354 } 1355 1356 /* 1357 * Remove a group from an interface 1358 */ 1359 int 1360 if_delgroup(struct ifnet *ifp, const char *groupname) 1361 { 1362 struct ifg_list *ifgl; 1363 struct ifg_member *ifgm; 1364 1365 IFNET_WLOCK(); 1366 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1367 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1368 break; 1369 if (ifgl == NULL) { 1370 IFNET_WUNLOCK(); 1371 return (ENOENT); 1372 } 1373 1374 IF_ADDR_WLOCK(ifp); 1375 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1376 IF_ADDR_WUNLOCK(ifp); 1377 1378 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1379 if (ifgm->ifgm_ifp == ifp) 1380 break; 1381 1382 if (ifgm != NULL) { 1383 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 1384 free(ifgm, M_TEMP); 1385 } 1386 1387 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1388 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1389 IFNET_WUNLOCK(); 1390 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group); 1391 free(ifgl->ifgl_group, M_TEMP); 1392 } else 1393 IFNET_WUNLOCK(); 1394 1395 free(ifgl, M_TEMP); 1396 1397 EVENTHANDLER_INVOKE(group_change_event, groupname); 1398 1399 return (0); 1400 } 1401 1402 /* 1403 * Remove an interface from all groups 1404 */ 1405 static void 1406 if_delgroups(struct ifnet *ifp) 1407 { 1408 struct ifg_list *ifgl; 1409 struct ifg_member *ifgm; 1410 char groupname[IFNAMSIZ]; 1411 1412 IFNET_WLOCK(); 1413 while (!TAILQ_EMPTY(&ifp->if_groups)) { 1414 ifgl = TAILQ_FIRST(&ifp->if_groups); 1415 1416 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ); 1417 1418 IF_ADDR_WLOCK(ifp); 1419 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1420 IF_ADDR_WUNLOCK(ifp); 1421 1422 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1423 if (ifgm->ifgm_ifp == ifp) 1424 break; 1425 1426 if (ifgm != NULL) { 1427 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, 1428 ifgm_next); 1429 free(ifgm, M_TEMP); 1430 } 1431 1432 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1433 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1434 IFNET_WUNLOCK(); 1435 EVENTHANDLER_INVOKE(group_detach_event, 1436 ifgl->ifgl_group); 1437 free(ifgl->ifgl_group, M_TEMP); 1438 } else 1439 IFNET_WUNLOCK(); 1440 1441 free(ifgl, M_TEMP); 1442 1443 EVENTHANDLER_INVOKE(group_change_event, groupname); 1444 1445 IFNET_WLOCK(); 1446 } 1447 IFNET_WUNLOCK(); 1448 } 1449 1450 /* 1451 * Stores all groups from an interface in memory pointed 1452 * to by data 1453 */ 1454 static int 1455 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp) 1456 { 1457 int len, error; 1458 struct ifg_list *ifgl; 1459 struct ifg_req ifgrq, *ifgp; 1460 struct ifgroupreq *ifgr = data; 1461 1462 if (ifgr->ifgr_len == 0) { 1463 IF_ADDR_RLOCK(ifp); 1464 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1465 ifgr->ifgr_len += sizeof(struct ifg_req); 1466 IF_ADDR_RUNLOCK(ifp); 1467 return (0); 1468 } 1469 1470 len = ifgr->ifgr_len; 1471 ifgp = ifgr->ifgr_groups; 1472 /* XXX: wire */ 1473 IF_ADDR_RLOCK(ifp); 1474 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 1475 if (len < sizeof(ifgrq)) { 1476 IF_ADDR_RUNLOCK(ifp); 1477 return (EINVAL); 1478 } 1479 bzero(&ifgrq, sizeof ifgrq); 1480 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 1481 sizeof(ifgrq.ifgrq_group)); 1482 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1483 IF_ADDR_RUNLOCK(ifp); 1484 return (error); 1485 } 1486 len -= sizeof(ifgrq); 1487 ifgp++; 1488 } 1489 IF_ADDR_RUNLOCK(ifp); 1490 1491 return (0); 1492 } 1493 1494 /* 1495 * Stores all members of a group in memory pointed to by data 1496 */ 1497 static int 1498 if_getgroupmembers(struct ifgroupreq *data) 1499 { 1500 struct ifgroupreq *ifgr = data; 1501 struct ifg_group *ifg; 1502 struct ifg_member *ifgm; 1503 struct ifg_req ifgrq, *ifgp; 1504 int len, error; 1505 1506 IFNET_RLOCK(); 1507 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1508 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 1509 break; 1510 if (ifg == NULL) { 1511 IFNET_RUNLOCK(); 1512 return (ENOENT); 1513 } 1514 1515 if (ifgr->ifgr_len == 0) { 1516 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1517 ifgr->ifgr_len += sizeof(ifgrq); 1518 IFNET_RUNLOCK(); 1519 return (0); 1520 } 1521 1522 len = ifgr->ifgr_len; 1523 ifgp = ifgr->ifgr_groups; 1524 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1525 if (len < sizeof(ifgrq)) { 1526 IFNET_RUNLOCK(); 1527 return (EINVAL); 1528 } 1529 bzero(&ifgrq, sizeof ifgrq); 1530 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1531 sizeof(ifgrq.ifgrq_member)); 1532 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1533 IFNET_RUNLOCK(); 1534 return (error); 1535 } 1536 len -= sizeof(ifgrq); 1537 ifgp++; 1538 } 1539 IFNET_RUNLOCK(); 1540 1541 return (0); 1542 } 1543 1544 /* 1545 * Return counter values from counter(9)s stored in ifnet. 1546 */ 1547 uint64_t 1548 if_get_counter_default(struct ifnet *ifp, ift_counter cnt) 1549 { 1550 1551 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1552 1553 return (counter_u64_fetch(ifp->if_counters[cnt])); 1554 } 1555 1556 /* 1557 * Increase an ifnet counter. Usually used for counters shared 1558 * between the stack and a driver, but function supports them all. 1559 */ 1560 void 1561 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc) 1562 { 1563 1564 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1565 1566 counter_u64_add(ifp->if_counters[cnt], inc); 1567 } 1568 1569 /* 1570 * Copy data from ifnet to userland API structure if_data. 1571 */ 1572 void 1573 if_data_copy(struct ifnet *ifp, struct if_data *ifd) 1574 { 1575 1576 ifd->ifi_type = ifp->if_type; 1577 ifd->ifi_physical = 0; 1578 ifd->ifi_addrlen = ifp->if_addrlen; 1579 ifd->ifi_hdrlen = ifp->if_hdrlen; 1580 ifd->ifi_link_state = ifp->if_link_state; 1581 ifd->ifi_vhid = 0; 1582 ifd->ifi_datalen = sizeof(struct if_data); 1583 ifd->ifi_mtu = ifp->if_mtu; 1584 ifd->ifi_metric = ifp->if_metric; 1585 ifd->ifi_baudrate = ifp->if_baudrate; 1586 ifd->ifi_hwassist = ifp->if_hwassist; 1587 ifd->ifi_epoch = ifp->if_epoch; 1588 ifd->ifi_lastchange = ifp->if_lastchange; 1589 1590 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS); 1591 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS); 1592 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS); 1593 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS); 1594 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS); 1595 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES); 1596 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES); 1597 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS); 1598 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS); 1599 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS); 1600 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS); 1601 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO); 1602 } 1603 1604 /* 1605 * Wrapper functions for struct ifnet address list locking macros. These are 1606 * used by kernel modules to avoid encoding programming interface or binary 1607 * interface assumptions that may be violated when kernel-internal locking 1608 * approaches change. 1609 */ 1610 void 1611 if_addr_rlock(struct ifnet *ifp) 1612 { 1613 1614 IF_ADDR_RLOCK(ifp); 1615 } 1616 1617 void 1618 if_addr_runlock(struct ifnet *ifp) 1619 { 1620 1621 IF_ADDR_RUNLOCK(ifp); 1622 } 1623 1624 void 1625 if_maddr_rlock(if_t ifp) 1626 { 1627 1628 IF_ADDR_RLOCK((struct ifnet *)ifp); 1629 } 1630 1631 void 1632 if_maddr_runlock(if_t ifp) 1633 { 1634 1635 IF_ADDR_RUNLOCK((struct ifnet *)ifp); 1636 } 1637 1638 /* 1639 * Initialization, destruction and refcounting functions for ifaddrs. 1640 */ 1641 struct ifaddr * 1642 ifa_alloc(size_t size, int flags) 1643 { 1644 struct ifaddr *ifa; 1645 1646 KASSERT(size >= sizeof(struct ifaddr), 1647 ("%s: invalid size %zu", __func__, size)); 1648 1649 ifa = malloc(size, M_IFADDR, M_ZERO | flags); 1650 if (ifa == NULL) 1651 return (NULL); 1652 1653 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL) 1654 goto fail; 1655 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL) 1656 goto fail; 1657 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL) 1658 goto fail; 1659 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL) 1660 goto fail; 1661 1662 refcount_init(&ifa->ifa_refcnt, 1); 1663 1664 return (ifa); 1665 1666 fail: 1667 /* free(NULL) is okay */ 1668 counter_u64_free(ifa->ifa_opackets); 1669 counter_u64_free(ifa->ifa_ipackets); 1670 counter_u64_free(ifa->ifa_obytes); 1671 counter_u64_free(ifa->ifa_ibytes); 1672 free(ifa, M_IFADDR); 1673 1674 return (NULL); 1675 } 1676 1677 void 1678 ifa_ref(struct ifaddr *ifa) 1679 { 1680 1681 refcount_acquire(&ifa->ifa_refcnt); 1682 } 1683 1684 void 1685 ifa_free(struct ifaddr *ifa) 1686 { 1687 1688 if (refcount_release(&ifa->ifa_refcnt)) { 1689 counter_u64_free(ifa->ifa_opackets); 1690 counter_u64_free(ifa->ifa_ipackets); 1691 counter_u64_free(ifa->ifa_obytes); 1692 counter_u64_free(ifa->ifa_ibytes); 1693 free(ifa, M_IFADDR); 1694 } 1695 } 1696 1697 static int 1698 ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa, 1699 struct sockaddr *ia) 1700 { 1701 int error; 1702 struct rt_addrinfo info; 1703 struct sockaddr_dl null_sdl; 1704 struct ifnet *ifp; 1705 1706 ifp = ifa->ifa_ifp; 1707 1708 bzero(&info, sizeof(info)); 1709 if (cmd != RTM_DELETE) 1710 info.rti_ifp = V_loif; 1711 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC | RTF_PINNED; 1712 info.rti_info[RTAX_DST] = ia; 1713 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1714 link_init_sdl(ifp, (struct sockaddr *)&null_sdl, ifp->if_type); 1715 1716 error = rtrequest1_fib(cmd, &info, NULL, ifp->if_fib); 1717 1718 if (error != 0) 1719 log(LOG_DEBUG, "%s: %s failed for interface %s: %u\n", 1720 __func__, otype, if_name(ifp), error); 1721 1722 return (error); 1723 } 1724 1725 int 1726 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1727 { 1728 1729 return (ifa_maintain_loopback_route(RTM_ADD, "insertion", ifa, ia)); 1730 } 1731 1732 int 1733 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1734 { 1735 1736 return (ifa_maintain_loopback_route(RTM_DELETE, "deletion", ifa, ia)); 1737 } 1738 1739 int 1740 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1741 { 1742 1743 return (ifa_maintain_loopback_route(RTM_CHANGE, "switch", ifa, ia)); 1744 } 1745 1746 /* 1747 * XXX: Because sockaddr_dl has deeper structure than the sockaddr 1748 * structs used to represent other address families, it is necessary 1749 * to perform a different comparison. 1750 */ 1751 1752 #define sa_dl_equal(a1, a2) \ 1753 ((((const struct sockaddr_dl *)(a1))->sdl_len == \ 1754 ((const struct sockaddr_dl *)(a2))->sdl_len) && \ 1755 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \ 1756 CLLADDR((const struct sockaddr_dl *)(a2)), \ 1757 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0)) 1758 1759 /* 1760 * Locate an interface based on a complete address. 1761 */ 1762 /*ARGSUSED*/ 1763 static struct ifaddr * 1764 ifa_ifwithaddr_internal(const struct sockaddr *addr, int getref) 1765 { 1766 struct ifnet *ifp; 1767 struct ifaddr *ifa; 1768 1769 IFNET_RLOCK_NOSLEEP(); 1770 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1771 IF_ADDR_RLOCK(ifp); 1772 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1773 if (ifa->ifa_addr->sa_family != addr->sa_family) 1774 continue; 1775 if (sa_equal(addr, ifa->ifa_addr)) { 1776 if (getref) 1777 ifa_ref(ifa); 1778 IF_ADDR_RUNLOCK(ifp); 1779 goto done; 1780 } 1781 /* IP6 doesn't have broadcast */ 1782 if ((ifp->if_flags & IFF_BROADCAST) && 1783 ifa->ifa_broadaddr && 1784 ifa->ifa_broadaddr->sa_len != 0 && 1785 sa_equal(ifa->ifa_broadaddr, addr)) { 1786 if (getref) 1787 ifa_ref(ifa); 1788 IF_ADDR_RUNLOCK(ifp); 1789 goto done; 1790 } 1791 } 1792 IF_ADDR_RUNLOCK(ifp); 1793 } 1794 ifa = NULL; 1795 done: 1796 IFNET_RUNLOCK_NOSLEEP(); 1797 return (ifa); 1798 } 1799 1800 struct ifaddr * 1801 ifa_ifwithaddr(const struct sockaddr *addr) 1802 { 1803 1804 return (ifa_ifwithaddr_internal(addr, 1)); 1805 } 1806 1807 int 1808 ifa_ifwithaddr_check(const struct sockaddr *addr) 1809 { 1810 1811 return (ifa_ifwithaddr_internal(addr, 0) != NULL); 1812 } 1813 1814 /* 1815 * Locate an interface based on the broadcast address. 1816 */ 1817 /* ARGSUSED */ 1818 struct ifaddr * 1819 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum) 1820 { 1821 struct ifnet *ifp; 1822 struct ifaddr *ifa; 1823 1824 IFNET_RLOCK_NOSLEEP(); 1825 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1826 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1827 continue; 1828 IF_ADDR_RLOCK(ifp); 1829 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1830 if (ifa->ifa_addr->sa_family != addr->sa_family) 1831 continue; 1832 if ((ifp->if_flags & IFF_BROADCAST) && 1833 ifa->ifa_broadaddr && 1834 ifa->ifa_broadaddr->sa_len != 0 && 1835 sa_equal(ifa->ifa_broadaddr, addr)) { 1836 ifa_ref(ifa); 1837 IF_ADDR_RUNLOCK(ifp); 1838 goto done; 1839 } 1840 } 1841 IF_ADDR_RUNLOCK(ifp); 1842 } 1843 ifa = NULL; 1844 done: 1845 IFNET_RUNLOCK_NOSLEEP(); 1846 return (ifa); 1847 } 1848 1849 /* 1850 * Locate the point to point interface with a given destination address. 1851 */ 1852 /*ARGSUSED*/ 1853 struct ifaddr * 1854 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum) 1855 { 1856 struct ifnet *ifp; 1857 struct ifaddr *ifa; 1858 1859 IFNET_RLOCK_NOSLEEP(); 1860 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1861 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1862 continue; 1863 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1864 continue; 1865 IF_ADDR_RLOCK(ifp); 1866 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1867 if (ifa->ifa_addr->sa_family != addr->sa_family) 1868 continue; 1869 if (ifa->ifa_dstaddr != NULL && 1870 sa_equal(addr, ifa->ifa_dstaddr)) { 1871 ifa_ref(ifa); 1872 IF_ADDR_RUNLOCK(ifp); 1873 goto done; 1874 } 1875 } 1876 IF_ADDR_RUNLOCK(ifp); 1877 } 1878 ifa = NULL; 1879 done: 1880 IFNET_RUNLOCK_NOSLEEP(); 1881 return (ifa); 1882 } 1883 1884 /* 1885 * Find an interface on a specific network. If many, choice 1886 * is most specific found. 1887 */ 1888 struct ifaddr * 1889 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum) 1890 { 1891 struct ifnet *ifp; 1892 struct ifaddr *ifa; 1893 struct ifaddr *ifa_maybe = NULL; 1894 u_int af = addr->sa_family; 1895 const char *addr_data = addr->sa_data, *cplim; 1896 1897 /* 1898 * AF_LINK addresses can be looked up directly by their index number, 1899 * so do that if we can. 1900 */ 1901 if (af == AF_LINK) { 1902 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)addr; 1903 if (sdl->sdl_index && sdl->sdl_index <= V_if_index) 1904 return (ifaddr_byindex(sdl->sdl_index)); 1905 } 1906 1907 /* 1908 * Scan though each interface, looking for ones that have addresses 1909 * in this address family and the requested fib. Maintain a reference 1910 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that 1911 * kept it stable when we move onto the next interface. 1912 */ 1913 IFNET_RLOCK_NOSLEEP(); 1914 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1915 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1916 continue; 1917 IF_ADDR_RLOCK(ifp); 1918 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1919 const char *cp, *cp2, *cp3; 1920 1921 if (ifa->ifa_addr->sa_family != af) 1922 next: continue; 1923 if (af == AF_INET && 1924 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) { 1925 /* 1926 * This is a bit broken as it doesn't 1927 * take into account that the remote end may 1928 * be a single node in the network we are 1929 * looking for. 1930 * The trouble is that we don't know the 1931 * netmask for the remote end. 1932 */ 1933 if (ifa->ifa_dstaddr != NULL && 1934 sa_equal(addr, ifa->ifa_dstaddr)) { 1935 ifa_ref(ifa); 1936 IF_ADDR_RUNLOCK(ifp); 1937 goto done; 1938 } 1939 } else { 1940 /* 1941 * Scan all the bits in the ifa's address. 1942 * If a bit dissagrees with what we are 1943 * looking for, mask it with the netmask 1944 * to see if it really matters. 1945 * (A byte at a time) 1946 */ 1947 if (ifa->ifa_netmask == 0) 1948 continue; 1949 cp = addr_data; 1950 cp2 = ifa->ifa_addr->sa_data; 1951 cp3 = ifa->ifa_netmask->sa_data; 1952 cplim = ifa->ifa_netmask->sa_len 1953 + (char *)ifa->ifa_netmask; 1954 while (cp3 < cplim) 1955 if ((*cp++ ^ *cp2++) & *cp3++) 1956 goto next; /* next address! */ 1957 /* 1958 * If the netmask of what we just found 1959 * is more specific than what we had before 1960 * (if we had one), or if the virtual status 1961 * of new prefix is better than of the old one, 1962 * then remember the new one before continuing 1963 * to search for an even better one. 1964 */ 1965 if (ifa_maybe == NULL || 1966 ifa_preferred(ifa_maybe, ifa) || 1967 rn_refines((caddr_t)ifa->ifa_netmask, 1968 (caddr_t)ifa_maybe->ifa_netmask)) { 1969 if (ifa_maybe != NULL) 1970 ifa_free(ifa_maybe); 1971 ifa_maybe = ifa; 1972 ifa_ref(ifa_maybe); 1973 } 1974 } 1975 } 1976 IF_ADDR_RUNLOCK(ifp); 1977 } 1978 ifa = ifa_maybe; 1979 ifa_maybe = NULL; 1980 done: 1981 IFNET_RUNLOCK_NOSLEEP(); 1982 if (ifa_maybe != NULL) 1983 ifa_free(ifa_maybe); 1984 return (ifa); 1985 } 1986 1987 /* 1988 * Find an interface address specific to an interface best matching 1989 * a given address. 1990 */ 1991 struct ifaddr * 1992 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp) 1993 { 1994 struct ifaddr *ifa; 1995 const char *cp, *cp2, *cp3; 1996 char *cplim; 1997 struct ifaddr *ifa_maybe = NULL; 1998 u_int af = addr->sa_family; 1999 2000 if (af >= AF_MAX) 2001 return (NULL); 2002 IF_ADDR_RLOCK(ifp); 2003 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2004 if (ifa->ifa_addr->sa_family != af) 2005 continue; 2006 if (ifa_maybe == NULL) 2007 ifa_maybe = ifa; 2008 if (ifa->ifa_netmask == 0) { 2009 if (sa_equal(addr, ifa->ifa_addr) || 2010 (ifa->ifa_dstaddr && 2011 sa_equal(addr, ifa->ifa_dstaddr))) 2012 goto done; 2013 continue; 2014 } 2015 if (ifp->if_flags & IFF_POINTOPOINT) { 2016 if (sa_equal(addr, ifa->ifa_dstaddr)) 2017 goto done; 2018 } else { 2019 cp = addr->sa_data; 2020 cp2 = ifa->ifa_addr->sa_data; 2021 cp3 = ifa->ifa_netmask->sa_data; 2022 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 2023 for (; cp3 < cplim; cp3++) 2024 if ((*cp++ ^ *cp2++) & *cp3) 2025 break; 2026 if (cp3 == cplim) 2027 goto done; 2028 } 2029 } 2030 ifa = ifa_maybe; 2031 done: 2032 if (ifa != NULL) 2033 ifa_ref(ifa); 2034 IF_ADDR_RUNLOCK(ifp); 2035 return (ifa); 2036 } 2037 2038 /* 2039 * See whether new ifa is better than current one: 2040 * 1) A non-virtual one is preferred over virtual. 2041 * 2) A virtual in master state preferred over any other state. 2042 * 2043 * Used in several address selecting functions. 2044 */ 2045 int 2046 ifa_preferred(struct ifaddr *cur, struct ifaddr *next) 2047 { 2048 2049 return (cur->ifa_carp && (!next->ifa_carp || 2050 ((*carp_master_p)(next) && !(*carp_master_p)(cur)))); 2051 } 2052 2053 #include <net/if_llatbl.h> 2054 2055 /* 2056 * Default action when installing a route with a Link Level gateway. 2057 * Lookup an appropriate real ifa to point to. 2058 * This should be moved to /sys/net/link.c eventually. 2059 */ 2060 static void 2061 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 2062 { 2063 struct ifaddr *ifa, *oifa; 2064 struct sockaddr *dst; 2065 struct ifnet *ifp; 2066 2067 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == NULL) || 2068 ((ifp = ifa->ifa_ifp) == NULL) || ((dst = rt_key(rt)) == NULL)) 2069 return; 2070 ifa = ifaof_ifpforaddr(dst, ifp); 2071 if (ifa) { 2072 oifa = rt->rt_ifa; 2073 rt->rt_ifa = ifa; 2074 ifa_free(oifa); 2075 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 2076 ifa->ifa_rtrequest(cmd, rt, info); 2077 } 2078 } 2079 2080 struct sockaddr_dl * 2081 link_alloc_sdl(size_t size, int flags) 2082 { 2083 2084 return (malloc(size, M_TEMP, flags)); 2085 } 2086 2087 void 2088 link_free_sdl(struct sockaddr *sa) 2089 { 2090 free(sa, M_TEMP); 2091 } 2092 2093 /* 2094 * Fills in given sdl with interface basic info. 2095 * Returns pointer to filled sdl. 2096 */ 2097 struct sockaddr_dl * 2098 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype) 2099 { 2100 struct sockaddr_dl *sdl; 2101 2102 sdl = (struct sockaddr_dl *)paddr; 2103 memset(sdl, 0, sizeof(struct sockaddr_dl)); 2104 sdl->sdl_len = sizeof(struct sockaddr_dl); 2105 sdl->sdl_family = AF_LINK; 2106 sdl->sdl_index = ifp->if_index; 2107 sdl->sdl_type = iftype; 2108 2109 return (sdl); 2110 } 2111 2112 /* 2113 * Mark an interface down and notify protocols of 2114 * the transition. 2115 */ 2116 static void 2117 if_unroute(struct ifnet *ifp, int flag, int fam) 2118 { 2119 struct ifaddr *ifa; 2120 2121 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP")); 2122 2123 ifp->if_flags &= ~flag; 2124 getmicrotime(&ifp->if_lastchange); 2125 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2126 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2127 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 2128 ifp->if_qflush(ifp); 2129 2130 if (ifp->if_carp) 2131 (*carp_linkstate_p)(ifp); 2132 rt_ifmsg(ifp); 2133 } 2134 2135 /* 2136 * Mark an interface up and notify protocols of 2137 * the transition. 2138 */ 2139 static void 2140 if_route(struct ifnet *ifp, int flag, int fam) 2141 { 2142 struct ifaddr *ifa; 2143 2144 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP")); 2145 2146 ifp->if_flags |= flag; 2147 getmicrotime(&ifp->if_lastchange); 2148 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2149 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2150 pfctlinput(PRC_IFUP, ifa->ifa_addr); 2151 if (ifp->if_carp) 2152 (*carp_linkstate_p)(ifp); 2153 rt_ifmsg(ifp); 2154 #ifdef INET6 2155 in6_if_up(ifp); 2156 #endif 2157 } 2158 2159 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */ 2160 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */ 2161 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *); 2162 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t); 2163 int (*vlan_tag_p)(struct ifnet *, uint16_t *); 2164 int (*vlan_setcookie_p)(struct ifnet *, void *); 2165 void *(*vlan_cookie_p)(struct ifnet *); 2166 2167 /* 2168 * Handle a change in the interface link state. To avoid LORs 2169 * between driver lock and upper layer locks, as well as possible 2170 * recursions, we post event to taskqueue, and all job 2171 * is done in static do_link_state_change(). 2172 */ 2173 void 2174 if_link_state_change(struct ifnet *ifp, int link_state) 2175 { 2176 /* Return if state hasn't changed. */ 2177 if (ifp->if_link_state == link_state) 2178 return; 2179 2180 ifp->if_link_state = link_state; 2181 2182 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask); 2183 } 2184 2185 static void 2186 do_link_state_change(void *arg, int pending) 2187 { 2188 struct ifnet *ifp = (struct ifnet *)arg; 2189 int link_state = ifp->if_link_state; 2190 CURVNET_SET(ifp->if_vnet); 2191 2192 /* Notify that the link state has changed. */ 2193 rt_ifmsg(ifp); 2194 if (ifp->if_vlantrunk != NULL) 2195 (*vlan_link_state_p)(ifp); 2196 2197 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) && 2198 ifp->if_l2com != NULL) 2199 (*ng_ether_link_state_p)(ifp, link_state); 2200 if (ifp->if_carp) 2201 (*carp_linkstate_p)(ifp); 2202 if (ifp->if_bridge) 2203 (*bridge_linkstate_p)(ifp); 2204 if (ifp->if_lagg) 2205 (*lagg_linkstate_p)(ifp, link_state); 2206 2207 if (IS_DEFAULT_VNET(curvnet)) 2208 devctl_notify("IFNET", ifp->if_xname, 2209 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", 2210 NULL); 2211 if (pending > 1) 2212 if_printf(ifp, "%d link states coalesced\n", pending); 2213 if (log_link_state_change) 2214 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname, 2215 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" ); 2216 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, link_state); 2217 CURVNET_RESTORE(); 2218 } 2219 2220 /* 2221 * Mark an interface down and notify protocols of 2222 * the transition. 2223 */ 2224 void 2225 if_down(struct ifnet *ifp) 2226 { 2227 2228 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_DOWN); 2229 if_unroute(ifp, IFF_UP, AF_UNSPEC); 2230 } 2231 2232 /* 2233 * Mark an interface up and notify protocols of 2234 * the transition. 2235 */ 2236 void 2237 if_up(struct ifnet *ifp) 2238 { 2239 2240 if_route(ifp, IFF_UP, AF_UNSPEC); 2241 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_UP); 2242 } 2243 2244 /* 2245 * Flush an interface queue. 2246 */ 2247 void 2248 if_qflush(struct ifnet *ifp) 2249 { 2250 struct mbuf *m, *n; 2251 struct ifaltq *ifq; 2252 2253 ifq = &ifp->if_snd; 2254 IFQ_LOCK(ifq); 2255 #ifdef ALTQ 2256 if (ALTQ_IS_ENABLED(ifq)) 2257 ALTQ_PURGE(ifq); 2258 #endif 2259 n = ifq->ifq_head; 2260 while ((m = n) != NULL) { 2261 n = m->m_nextpkt; 2262 m_freem(m); 2263 } 2264 ifq->ifq_head = 0; 2265 ifq->ifq_tail = 0; 2266 ifq->ifq_len = 0; 2267 IFQ_UNLOCK(ifq); 2268 } 2269 2270 /* 2271 * Map interface name to interface structure pointer, with or without 2272 * returning a reference. 2273 */ 2274 struct ifnet * 2275 ifunit_ref(const char *name) 2276 { 2277 struct ifnet *ifp; 2278 2279 IFNET_RLOCK_NOSLEEP(); 2280 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2281 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 && 2282 !(ifp->if_flags & IFF_DYING)) 2283 break; 2284 } 2285 if (ifp != NULL) 2286 if_ref(ifp); 2287 IFNET_RUNLOCK_NOSLEEP(); 2288 return (ifp); 2289 } 2290 2291 struct ifnet * 2292 ifunit(const char *name) 2293 { 2294 struct ifnet *ifp; 2295 2296 IFNET_RLOCK_NOSLEEP(); 2297 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2298 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0) 2299 break; 2300 } 2301 IFNET_RUNLOCK_NOSLEEP(); 2302 return (ifp); 2303 } 2304 2305 /* 2306 * Hardware specific interface ioctls. 2307 */ 2308 static int 2309 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td) 2310 { 2311 struct ifreq *ifr; 2312 int error = 0, do_ifup = 0; 2313 int new_flags, temp_flags; 2314 size_t namelen, onamelen; 2315 size_t descrlen; 2316 char *descrbuf, *odescrbuf; 2317 char new_name[IFNAMSIZ]; 2318 struct ifaddr *ifa; 2319 struct sockaddr_dl *sdl; 2320 2321 ifr = (struct ifreq *)data; 2322 switch (cmd) { 2323 case SIOCGIFINDEX: 2324 ifr->ifr_index = ifp->if_index; 2325 break; 2326 2327 case SIOCGIFFLAGS: 2328 temp_flags = ifp->if_flags | ifp->if_drv_flags; 2329 ifr->ifr_flags = temp_flags & 0xffff; 2330 ifr->ifr_flagshigh = temp_flags >> 16; 2331 break; 2332 2333 case SIOCGIFCAP: 2334 ifr->ifr_reqcap = ifp->if_capabilities; 2335 ifr->ifr_curcap = ifp->if_capenable; 2336 break; 2337 2338 #ifdef MAC 2339 case SIOCGIFMAC: 2340 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp); 2341 break; 2342 #endif 2343 2344 case SIOCGIFMETRIC: 2345 ifr->ifr_metric = ifp->if_metric; 2346 break; 2347 2348 case SIOCGIFMTU: 2349 ifr->ifr_mtu = ifp->if_mtu; 2350 break; 2351 2352 case SIOCGIFPHYS: 2353 /* XXXGL: did this ever worked? */ 2354 ifr->ifr_phys = 0; 2355 break; 2356 2357 case SIOCGIFDESCR: 2358 error = 0; 2359 sx_slock(&ifdescr_sx); 2360 if (ifp->if_description == NULL) 2361 error = ENOMSG; 2362 else { 2363 /* space for terminating nul */ 2364 descrlen = strlen(ifp->if_description) + 1; 2365 if (ifr->ifr_buffer.length < descrlen) 2366 ifr->ifr_buffer.buffer = NULL; 2367 else 2368 error = copyout(ifp->if_description, 2369 ifr->ifr_buffer.buffer, descrlen); 2370 ifr->ifr_buffer.length = descrlen; 2371 } 2372 sx_sunlock(&ifdescr_sx); 2373 break; 2374 2375 case SIOCSIFDESCR: 2376 error = priv_check(td, PRIV_NET_SETIFDESCR); 2377 if (error) 2378 return (error); 2379 2380 /* 2381 * Copy only (length-1) bytes to make sure that 2382 * if_description is always nul terminated. The 2383 * length parameter is supposed to count the 2384 * terminating nul in. 2385 */ 2386 if (ifr->ifr_buffer.length > ifdescr_maxlen) 2387 return (ENAMETOOLONG); 2388 else if (ifr->ifr_buffer.length == 0) 2389 descrbuf = NULL; 2390 else { 2391 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR, 2392 M_WAITOK | M_ZERO); 2393 error = copyin(ifr->ifr_buffer.buffer, descrbuf, 2394 ifr->ifr_buffer.length - 1); 2395 if (error) { 2396 free(descrbuf, M_IFDESCR); 2397 break; 2398 } 2399 } 2400 2401 sx_xlock(&ifdescr_sx); 2402 odescrbuf = ifp->if_description; 2403 ifp->if_description = descrbuf; 2404 sx_xunlock(&ifdescr_sx); 2405 2406 getmicrotime(&ifp->if_lastchange); 2407 free(odescrbuf, M_IFDESCR); 2408 break; 2409 2410 case SIOCGIFFIB: 2411 ifr->ifr_fib = ifp->if_fib; 2412 break; 2413 2414 case SIOCSIFFIB: 2415 error = priv_check(td, PRIV_NET_SETIFFIB); 2416 if (error) 2417 return (error); 2418 if (ifr->ifr_fib >= rt_numfibs) 2419 return (EINVAL); 2420 2421 ifp->if_fib = ifr->ifr_fib; 2422 break; 2423 2424 case SIOCSIFFLAGS: 2425 error = priv_check(td, PRIV_NET_SETIFFLAGS); 2426 if (error) 2427 return (error); 2428 /* 2429 * Currently, no driver owned flags pass the IFF_CANTCHANGE 2430 * check, so we don't need special handling here yet. 2431 */ 2432 new_flags = (ifr->ifr_flags & 0xffff) | 2433 (ifr->ifr_flagshigh << 16); 2434 if (ifp->if_flags & IFF_UP && 2435 (new_flags & IFF_UP) == 0) { 2436 if_down(ifp); 2437 } else if (new_flags & IFF_UP && 2438 (ifp->if_flags & IFF_UP) == 0) { 2439 do_ifup = 1; 2440 } 2441 /* See if permanently promiscuous mode bit is about to flip */ 2442 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) { 2443 if (new_flags & IFF_PPROMISC) 2444 ifp->if_flags |= IFF_PROMISC; 2445 else if (ifp->if_pcount == 0) 2446 ifp->if_flags &= ~IFF_PROMISC; 2447 if (log_promisc_mode_change) 2448 log(LOG_INFO, "%s: permanently promiscuous mode %s\n", 2449 ifp->if_xname, 2450 ((new_flags & IFF_PPROMISC) ? 2451 "enabled" : "disabled")); 2452 } 2453 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 2454 (new_flags &~ IFF_CANTCHANGE); 2455 if (ifp->if_ioctl) { 2456 (void) (*ifp->if_ioctl)(ifp, cmd, data); 2457 } 2458 if (do_ifup) 2459 if_up(ifp); 2460 getmicrotime(&ifp->if_lastchange); 2461 break; 2462 2463 case SIOCSIFCAP: 2464 error = priv_check(td, PRIV_NET_SETIFCAP); 2465 if (error) 2466 return (error); 2467 if (ifp->if_ioctl == NULL) 2468 return (EOPNOTSUPP); 2469 if (ifr->ifr_reqcap & ~ifp->if_capabilities) 2470 return (EINVAL); 2471 error = (*ifp->if_ioctl)(ifp, cmd, data); 2472 if (error == 0) 2473 getmicrotime(&ifp->if_lastchange); 2474 break; 2475 2476 #ifdef MAC 2477 case SIOCSIFMAC: 2478 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp); 2479 break; 2480 #endif 2481 2482 case SIOCSIFNAME: 2483 error = priv_check(td, PRIV_NET_SETIFNAME); 2484 if (error) 2485 return (error); 2486 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 2487 if (error != 0) 2488 return (error); 2489 if (new_name[0] == '\0') 2490 return (EINVAL); 2491 if (new_name[IFNAMSIZ-1] != '\0') { 2492 new_name[IFNAMSIZ-1] = '\0'; 2493 if (strlen(new_name) == IFNAMSIZ-1) 2494 return (EINVAL); 2495 } 2496 if (ifunit(new_name) != NULL) 2497 return (EEXIST); 2498 2499 /* 2500 * XXX: Locking. Nothing else seems to lock if_flags, 2501 * and there are numerous other races with the 2502 * ifunit() checks not being atomic with namespace 2503 * changes (renames, vmoves, if_attach, etc). 2504 */ 2505 ifp->if_flags |= IFF_RENAMING; 2506 2507 /* Announce the departure of the interface. */ 2508 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 2509 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 2510 2511 log(LOG_INFO, "%s: changing name to '%s'\n", 2512 ifp->if_xname, new_name); 2513 2514 IF_ADDR_WLOCK(ifp); 2515 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 2516 ifa = ifp->if_addr; 2517 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 2518 namelen = strlen(new_name); 2519 onamelen = sdl->sdl_nlen; 2520 /* 2521 * Move the address if needed. This is safe because we 2522 * allocate space for a name of length IFNAMSIZ when we 2523 * create this in if_attach(). 2524 */ 2525 if (namelen != onamelen) { 2526 bcopy(sdl->sdl_data + onamelen, 2527 sdl->sdl_data + namelen, sdl->sdl_alen); 2528 } 2529 bcopy(new_name, sdl->sdl_data, namelen); 2530 sdl->sdl_nlen = namelen; 2531 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 2532 bzero(sdl->sdl_data, onamelen); 2533 while (namelen != 0) 2534 sdl->sdl_data[--namelen] = 0xff; 2535 IF_ADDR_WUNLOCK(ifp); 2536 2537 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 2538 /* Announce the return of the interface. */ 2539 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 2540 2541 ifp->if_flags &= ~IFF_RENAMING; 2542 break; 2543 2544 #ifdef VIMAGE 2545 case SIOCSIFVNET: 2546 error = priv_check(td, PRIV_NET_SETIFVNET); 2547 if (error) 2548 return (error); 2549 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid); 2550 break; 2551 #endif 2552 2553 case SIOCSIFMETRIC: 2554 error = priv_check(td, PRIV_NET_SETIFMETRIC); 2555 if (error) 2556 return (error); 2557 ifp->if_metric = ifr->ifr_metric; 2558 getmicrotime(&ifp->if_lastchange); 2559 break; 2560 2561 case SIOCSIFPHYS: 2562 error = priv_check(td, PRIV_NET_SETIFPHYS); 2563 if (error) 2564 return (error); 2565 if (ifp->if_ioctl == NULL) 2566 return (EOPNOTSUPP); 2567 error = (*ifp->if_ioctl)(ifp, cmd, data); 2568 if (error == 0) 2569 getmicrotime(&ifp->if_lastchange); 2570 break; 2571 2572 case SIOCSIFMTU: 2573 { 2574 u_long oldmtu = ifp->if_mtu; 2575 2576 error = priv_check(td, PRIV_NET_SETIFMTU); 2577 if (error) 2578 return (error); 2579 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) 2580 return (EINVAL); 2581 if (ifp->if_ioctl == NULL) 2582 return (EOPNOTSUPP); 2583 error = (*ifp->if_ioctl)(ifp, cmd, data); 2584 if (error == 0) { 2585 getmicrotime(&ifp->if_lastchange); 2586 rt_ifmsg(ifp); 2587 } 2588 /* 2589 * If the link MTU changed, do network layer specific procedure. 2590 */ 2591 if (ifp->if_mtu != oldmtu) { 2592 #ifdef INET6 2593 nd6_setmtu(ifp); 2594 #endif 2595 rt_updatemtu(ifp); 2596 } 2597 break; 2598 } 2599 2600 case SIOCADDMULTI: 2601 case SIOCDELMULTI: 2602 if (cmd == SIOCADDMULTI) 2603 error = priv_check(td, PRIV_NET_ADDMULTI); 2604 else 2605 error = priv_check(td, PRIV_NET_DELMULTI); 2606 if (error) 2607 return (error); 2608 2609 /* Don't allow group membership on non-multicast interfaces. */ 2610 if ((ifp->if_flags & IFF_MULTICAST) == 0) 2611 return (EOPNOTSUPP); 2612 2613 /* Don't let users screw up protocols' entries. */ 2614 if (ifr->ifr_addr.sa_family != AF_LINK) 2615 return (EINVAL); 2616 2617 if (cmd == SIOCADDMULTI) { 2618 struct ifmultiaddr *ifma; 2619 2620 /* 2621 * Userland is only permitted to join groups once 2622 * via the if_addmulti() KPI, because it cannot hold 2623 * struct ifmultiaddr * between calls. It may also 2624 * lose a race while we check if the membership 2625 * already exists. 2626 */ 2627 IF_ADDR_RLOCK(ifp); 2628 ifma = if_findmulti(ifp, &ifr->ifr_addr); 2629 IF_ADDR_RUNLOCK(ifp); 2630 if (ifma != NULL) 2631 error = EADDRINUSE; 2632 else 2633 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 2634 } else { 2635 error = if_delmulti(ifp, &ifr->ifr_addr); 2636 } 2637 if (error == 0) 2638 getmicrotime(&ifp->if_lastchange); 2639 break; 2640 2641 case SIOCSIFPHYADDR: 2642 case SIOCDIFPHYADDR: 2643 #ifdef INET6 2644 case SIOCSIFPHYADDR_IN6: 2645 #endif 2646 case SIOCSIFMEDIA: 2647 case SIOCSIFGENERIC: 2648 error = priv_check(td, PRIV_NET_HWIOCTL); 2649 if (error) 2650 return (error); 2651 if (ifp->if_ioctl == NULL) 2652 return (EOPNOTSUPP); 2653 error = (*ifp->if_ioctl)(ifp, cmd, data); 2654 if (error == 0) 2655 getmicrotime(&ifp->if_lastchange); 2656 break; 2657 2658 case SIOCGIFSTATUS: 2659 case SIOCGIFPSRCADDR: 2660 case SIOCGIFPDSTADDR: 2661 case SIOCGIFMEDIA: 2662 case SIOCGIFXMEDIA: 2663 case SIOCGIFGENERIC: 2664 case SIOCGIFRSSKEY: 2665 case SIOCGIFRSSHASH: 2666 if (ifp->if_ioctl == NULL) 2667 return (EOPNOTSUPP); 2668 error = (*ifp->if_ioctl)(ifp, cmd, data); 2669 break; 2670 2671 case SIOCSIFLLADDR: 2672 error = priv_check(td, PRIV_NET_SETLLADDR); 2673 if (error) 2674 return (error); 2675 error = if_setlladdr(ifp, 2676 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); 2677 break; 2678 2679 case SIOCGHWADDR: 2680 error = if_gethwaddr(ifp, ifr); 2681 break; 2682 2683 case SIOCAIFGROUP: 2684 { 2685 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2686 2687 error = priv_check(td, PRIV_NET_ADDIFGROUP); 2688 if (error) 2689 return (error); 2690 if ((error = if_addgroup(ifp, ifgr->ifgr_group))) 2691 return (error); 2692 break; 2693 } 2694 2695 case SIOCGIFGROUP: 2696 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp))) 2697 return (error); 2698 break; 2699 2700 case SIOCDIFGROUP: 2701 { 2702 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2703 2704 error = priv_check(td, PRIV_NET_DELIFGROUP); 2705 if (error) 2706 return (error); 2707 if ((error = if_delgroup(ifp, ifgr->ifgr_group))) 2708 return (error); 2709 break; 2710 } 2711 2712 default: 2713 error = ENOIOCTL; 2714 break; 2715 } 2716 return (error); 2717 } 2718 2719 #ifdef COMPAT_FREEBSD32 2720 struct ifconf32 { 2721 int32_t ifc_len; 2722 union { 2723 uint32_t ifcu_buf; 2724 uint32_t ifcu_req; 2725 } ifc_ifcu; 2726 }; 2727 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32) 2728 #endif 2729 2730 /* 2731 * Interface ioctls. 2732 */ 2733 int 2734 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td) 2735 { 2736 struct ifnet *ifp; 2737 struct ifreq *ifr; 2738 int error; 2739 int oif_flags; 2740 #ifdef VIMAGE 2741 int shutdown; 2742 #endif 2743 2744 CURVNET_SET(so->so_vnet); 2745 #ifdef VIMAGE 2746 /* Make sure the VNET is stable. */ 2747 shutdown = (so->so_vnet->vnet_state > SI_SUB_VNET && 2748 so->so_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0; 2749 if (shutdown) { 2750 CURVNET_RESTORE(); 2751 return (EBUSY); 2752 } 2753 #endif 2754 2755 2756 switch (cmd) { 2757 case SIOCGIFCONF: 2758 error = ifconf(cmd, data); 2759 CURVNET_RESTORE(); 2760 return (error); 2761 2762 #ifdef COMPAT_FREEBSD32 2763 case SIOCGIFCONF32: 2764 { 2765 struct ifconf32 *ifc32; 2766 struct ifconf ifc; 2767 2768 ifc32 = (struct ifconf32 *)data; 2769 ifc.ifc_len = ifc32->ifc_len; 2770 ifc.ifc_buf = PTRIN(ifc32->ifc_buf); 2771 2772 error = ifconf(SIOCGIFCONF, (void *)&ifc); 2773 CURVNET_RESTORE(); 2774 if (error == 0) 2775 ifc32->ifc_len = ifc.ifc_len; 2776 return (error); 2777 } 2778 #endif 2779 } 2780 ifr = (struct ifreq *)data; 2781 2782 switch (cmd) { 2783 #ifdef VIMAGE 2784 case SIOCSIFRVNET: 2785 error = priv_check(td, PRIV_NET_SETIFVNET); 2786 if (error == 0) 2787 error = if_vmove_reclaim(td, ifr->ifr_name, 2788 ifr->ifr_jid); 2789 CURVNET_RESTORE(); 2790 return (error); 2791 #endif 2792 case SIOCIFCREATE: 2793 case SIOCIFCREATE2: 2794 error = priv_check(td, PRIV_NET_IFCREATE); 2795 if (error == 0) 2796 error = if_clone_create(ifr->ifr_name, 2797 sizeof(ifr->ifr_name), 2798 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL); 2799 CURVNET_RESTORE(); 2800 return (error); 2801 case SIOCIFDESTROY: 2802 error = priv_check(td, PRIV_NET_IFDESTROY); 2803 if (error == 0) 2804 error = if_clone_destroy(ifr->ifr_name); 2805 CURVNET_RESTORE(); 2806 return (error); 2807 2808 case SIOCIFGCLONERS: 2809 error = if_clone_list((struct if_clonereq *)data); 2810 CURVNET_RESTORE(); 2811 return (error); 2812 case SIOCGIFGMEMB: 2813 error = if_getgroupmembers((struct ifgroupreq *)data); 2814 CURVNET_RESTORE(); 2815 return (error); 2816 #if defined(INET) || defined(INET6) 2817 case SIOCSVH: 2818 case SIOCGVH: 2819 if (carp_ioctl_p == NULL) 2820 error = EPROTONOSUPPORT; 2821 else 2822 error = (*carp_ioctl_p)(ifr, cmd, td); 2823 CURVNET_RESTORE(); 2824 return (error); 2825 #endif 2826 } 2827 2828 ifp = ifunit_ref(ifr->ifr_name); 2829 if (ifp == NULL) { 2830 CURVNET_RESTORE(); 2831 return (ENXIO); 2832 } 2833 2834 error = ifhwioctl(cmd, ifp, data, td); 2835 if (error != ENOIOCTL) { 2836 if_rele(ifp); 2837 CURVNET_RESTORE(); 2838 return (error); 2839 } 2840 2841 oif_flags = ifp->if_flags; 2842 if (so->so_proto == NULL) { 2843 if_rele(ifp); 2844 CURVNET_RESTORE(); 2845 return (EOPNOTSUPP); 2846 } 2847 2848 /* 2849 * Pass the request on to the socket control method, and if the 2850 * latter returns EOPNOTSUPP, directly to the interface. 2851 * 2852 * Make an exception for the legacy SIOCSIF* requests. Drivers 2853 * trust SIOCSIFADDR et al to come from an already privileged 2854 * layer, and do not perform any credentials checks or input 2855 * validation. 2856 */ 2857 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 2858 ifp, td)); 2859 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL && 2860 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR && 2861 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK) 2862 error = (*ifp->if_ioctl)(ifp, cmd, data); 2863 2864 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 2865 #ifdef INET6 2866 if (ifp->if_flags & IFF_UP) 2867 in6_if_up(ifp); 2868 #endif 2869 } 2870 if_rele(ifp); 2871 CURVNET_RESTORE(); 2872 return (error); 2873 } 2874 2875 /* 2876 * The code common to handling reference counted flags, 2877 * e.g., in ifpromisc() and if_allmulti(). 2878 * The "pflag" argument can specify a permanent mode flag to check, 2879 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none. 2880 * 2881 * Only to be used on stack-owned flags, not driver-owned flags. 2882 */ 2883 static int 2884 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch) 2885 { 2886 struct ifreq ifr; 2887 int error; 2888 int oldflags, oldcount; 2889 2890 /* Sanity checks to catch programming errors */ 2891 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0, 2892 ("%s: setting driver-owned flag %d", __func__, flag)); 2893 2894 if (onswitch) 2895 KASSERT(*refcount >= 0, 2896 ("%s: increment negative refcount %d for flag %d", 2897 __func__, *refcount, flag)); 2898 else 2899 KASSERT(*refcount > 0, 2900 ("%s: decrement non-positive refcount %d for flag %d", 2901 __func__, *refcount, flag)); 2902 2903 /* In case this mode is permanent, just touch refcount */ 2904 if (ifp->if_flags & pflag) { 2905 *refcount += onswitch ? 1 : -1; 2906 return (0); 2907 } 2908 2909 /* Save ifnet parameters for if_ioctl() may fail */ 2910 oldcount = *refcount; 2911 oldflags = ifp->if_flags; 2912 2913 /* 2914 * See if we aren't the only and touching refcount is enough. 2915 * Actually toggle interface flag if we are the first or last. 2916 */ 2917 if (onswitch) { 2918 if ((*refcount)++) 2919 return (0); 2920 ifp->if_flags |= flag; 2921 } else { 2922 if (--(*refcount)) 2923 return (0); 2924 ifp->if_flags &= ~flag; 2925 } 2926 2927 /* Call down the driver since we've changed interface flags */ 2928 if (ifp->if_ioctl == NULL) { 2929 error = EOPNOTSUPP; 2930 goto recover; 2931 } 2932 ifr.ifr_flags = ifp->if_flags & 0xffff; 2933 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2934 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 2935 if (error) 2936 goto recover; 2937 /* Notify userland that interface flags have changed */ 2938 rt_ifmsg(ifp); 2939 return (0); 2940 2941 recover: 2942 /* Recover after driver error */ 2943 *refcount = oldcount; 2944 ifp->if_flags = oldflags; 2945 return (error); 2946 } 2947 2948 /* 2949 * Set/clear promiscuous mode on interface ifp based on the truth value 2950 * of pswitch. The calls are reference counted so that only the first 2951 * "on" request actually has an effect, as does the final "off" request. 2952 * Results are undefined if the "off" and "on" requests are not matched. 2953 */ 2954 int 2955 ifpromisc(struct ifnet *ifp, int pswitch) 2956 { 2957 int error; 2958 int oldflags = ifp->if_flags; 2959 2960 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC, 2961 &ifp->if_pcount, pswitch); 2962 /* If promiscuous mode status has changed, log a message */ 2963 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) && 2964 log_promisc_mode_change) 2965 log(LOG_INFO, "%s: promiscuous mode %s\n", 2966 ifp->if_xname, 2967 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled"); 2968 return (error); 2969 } 2970 2971 /* 2972 * Return interface configuration 2973 * of system. List may be used 2974 * in later ioctl's (above) to get 2975 * other information. 2976 */ 2977 /*ARGSUSED*/ 2978 static int 2979 ifconf(u_long cmd, caddr_t data) 2980 { 2981 struct ifconf *ifc = (struct ifconf *)data; 2982 struct ifnet *ifp; 2983 struct ifaddr *ifa; 2984 struct ifreq ifr; 2985 struct sbuf *sb; 2986 int error, full = 0, valid_len, max_len; 2987 2988 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */ 2989 max_len = MAXPHYS - 1; 2990 2991 /* Prevent hostile input from being able to crash the system */ 2992 if (ifc->ifc_len <= 0) 2993 return (EINVAL); 2994 2995 again: 2996 if (ifc->ifc_len <= max_len) { 2997 max_len = ifc->ifc_len; 2998 full = 1; 2999 } 3000 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN); 3001 max_len = 0; 3002 valid_len = 0; 3003 3004 IFNET_RLOCK(); 3005 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 3006 int addrs; 3007 3008 /* 3009 * Zero the ifr_name buffer to make sure we don't 3010 * disclose the contents of the stack. 3011 */ 3012 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name)); 3013 3014 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 3015 >= sizeof(ifr.ifr_name)) { 3016 sbuf_delete(sb); 3017 IFNET_RUNLOCK(); 3018 return (ENAMETOOLONG); 3019 } 3020 3021 addrs = 0; 3022 IF_ADDR_RLOCK(ifp); 3023 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 3024 struct sockaddr *sa = ifa->ifa_addr; 3025 3026 if (prison_if(curthread->td_ucred, sa) != 0) 3027 continue; 3028 addrs++; 3029 if (sa->sa_len <= sizeof(*sa)) { 3030 ifr.ifr_addr = *sa; 3031 sbuf_bcat(sb, &ifr, sizeof(ifr)); 3032 max_len += sizeof(ifr); 3033 } else { 3034 sbuf_bcat(sb, &ifr, 3035 offsetof(struct ifreq, ifr_addr)); 3036 max_len += offsetof(struct ifreq, ifr_addr); 3037 sbuf_bcat(sb, sa, sa->sa_len); 3038 max_len += sa->sa_len; 3039 } 3040 3041 if (sbuf_error(sb) == 0) 3042 valid_len = sbuf_len(sb); 3043 } 3044 IF_ADDR_RUNLOCK(ifp); 3045 if (addrs == 0) { 3046 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr)); 3047 sbuf_bcat(sb, &ifr, sizeof(ifr)); 3048 max_len += sizeof(ifr); 3049 3050 if (sbuf_error(sb) == 0) 3051 valid_len = sbuf_len(sb); 3052 } 3053 } 3054 IFNET_RUNLOCK(); 3055 3056 /* 3057 * If we didn't allocate enough space (uncommon), try again. If 3058 * we have already allocated as much space as we are allowed, 3059 * return what we've got. 3060 */ 3061 if (valid_len != max_len && !full) { 3062 sbuf_delete(sb); 3063 goto again; 3064 } 3065 3066 ifc->ifc_len = valid_len; 3067 sbuf_finish(sb); 3068 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len); 3069 sbuf_delete(sb); 3070 return (error); 3071 } 3072 3073 /* 3074 * Just like ifpromisc(), but for all-multicast-reception mode. 3075 */ 3076 int 3077 if_allmulti(struct ifnet *ifp, int onswitch) 3078 { 3079 3080 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch)); 3081 } 3082 3083 struct ifmultiaddr * 3084 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa) 3085 { 3086 struct ifmultiaddr *ifma; 3087 3088 IF_ADDR_LOCK_ASSERT(ifp); 3089 3090 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 3091 if (sa->sa_family == AF_LINK) { 3092 if (sa_dl_equal(ifma->ifma_addr, sa)) 3093 break; 3094 } else { 3095 if (sa_equal(ifma->ifma_addr, sa)) 3096 break; 3097 } 3098 } 3099 3100 return ifma; 3101 } 3102 3103 /* 3104 * Allocate a new ifmultiaddr and initialize based on passed arguments. We 3105 * make copies of passed sockaddrs. The ifmultiaddr will not be added to 3106 * the ifnet multicast address list here, so the caller must do that and 3107 * other setup work (such as notifying the device driver). The reference 3108 * count is initialized to 1. 3109 */ 3110 static struct ifmultiaddr * 3111 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa, 3112 int mflags) 3113 { 3114 struct ifmultiaddr *ifma; 3115 struct sockaddr *dupsa; 3116 3117 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags | 3118 M_ZERO); 3119 if (ifma == NULL) 3120 return (NULL); 3121 3122 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags); 3123 if (dupsa == NULL) { 3124 free(ifma, M_IFMADDR); 3125 return (NULL); 3126 } 3127 bcopy(sa, dupsa, sa->sa_len); 3128 ifma->ifma_addr = dupsa; 3129 3130 ifma->ifma_ifp = ifp; 3131 ifma->ifma_refcount = 1; 3132 ifma->ifma_protospec = NULL; 3133 3134 if (llsa == NULL) { 3135 ifma->ifma_lladdr = NULL; 3136 return (ifma); 3137 } 3138 3139 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags); 3140 if (dupsa == NULL) { 3141 free(ifma->ifma_addr, M_IFMADDR); 3142 free(ifma, M_IFMADDR); 3143 return (NULL); 3144 } 3145 bcopy(llsa, dupsa, llsa->sa_len); 3146 ifma->ifma_lladdr = dupsa; 3147 3148 return (ifma); 3149 } 3150 3151 /* 3152 * if_freemulti: free ifmultiaddr structure and possibly attached related 3153 * addresses. The caller is responsible for implementing reference 3154 * counting, notifying the driver, handling routing messages, and releasing 3155 * any dependent link layer state. 3156 */ 3157 static void 3158 if_freemulti(struct ifmultiaddr *ifma) 3159 { 3160 3161 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d", 3162 ifma->ifma_refcount)); 3163 3164 if (ifma->ifma_lladdr != NULL) 3165 free(ifma->ifma_lladdr, M_IFMADDR); 3166 free(ifma->ifma_addr, M_IFMADDR); 3167 free(ifma, M_IFMADDR); 3168 } 3169 3170 /* 3171 * Register an additional multicast address with a network interface. 3172 * 3173 * - If the address is already present, bump the reference count on the 3174 * address and return. 3175 * - If the address is not link-layer, look up a link layer address. 3176 * - Allocate address structures for one or both addresses, and attach to the 3177 * multicast address list on the interface. If automatically adding a link 3178 * layer address, the protocol address will own a reference to the link 3179 * layer address, to be freed when it is freed. 3180 * - Notify the network device driver of an addition to the multicast address 3181 * list. 3182 * 3183 * 'sa' points to caller-owned memory with the desired multicast address. 3184 * 3185 * 'retifma' will be used to return a pointer to the resulting multicast 3186 * address reference, if desired. 3187 */ 3188 int 3189 if_addmulti(struct ifnet *ifp, struct sockaddr *sa, 3190 struct ifmultiaddr **retifma) 3191 { 3192 struct ifmultiaddr *ifma, *ll_ifma; 3193 struct sockaddr *llsa; 3194 struct sockaddr_dl sdl; 3195 int error; 3196 3197 /* 3198 * If the address is already present, return a new reference to it; 3199 * otherwise, allocate storage and set up a new address. 3200 */ 3201 IF_ADDR_WLOCK(ifp); 3202 ifma = if_findmulti(ifp, sa); 3203 if (ifma != NULL) { 3204 ifma->ifma_refcount++; 3205 if (retifma != NULL) 3206 *retifma = ifma; 3207 IF_ADDR_WUNLOCK(ifp); 3208 return (0); 3209 } 3210 3211 /* 3212 * The address isn't already present; resolve the protocol address 3213 * into a link layer address, and then look that up, bump its 3214 * refcount or allocate an ifma for that also. 3215 * Most link layer resolving functions returns address data which 3216 * fits inside default sockaddr_dl structure. However callback 3217 * can allocate another sockaddr structure, in that case we need to 3218 * free it later. 3219 */ 3220 llsa = NULL; 3221 ll_ifma = NULL; 3222 if (ifp->if_resolvemulti != NULL) { 3223 /* Provide called function with buffer size information */ 3224 sdl.sdl_len = sizeof(sdl); 3225 llsa = (struct sockaddr *)&sdl; 3226 error = ifp->if_resolvemulti(ifp, &llsa, sa); 3227 if (error) 3228 goto unlock_out; 3229 } 3230 3231 /* 3232 * Allocate the new address. Don't hook it up yet, as we may also 3233 * need to allocate a link layer multicast address. 3234 */ 3235 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT); 3236 if (ifma == NULL) { 3237 error = ENOMEM; 3238 goto free_llsa_out; 3239 } 3240 3241 /* 3242 * If a link layer address is found, we'll need to see if it's 3243 * already present in the address list, or allocate is as well. 3244 * When this block finishes, the link layer address will be on the 3245 * list. 3246 */ 3247 if (llsa != NULL) { 3248 ll_ifma = if_findmulti(ifp, llsa); 3249 if (ll_ifma == NULL) { 3250 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT); 3251 if (ll_ifma == NULL) { 3252 --ifma->ifma_refcount; 3253 if_freemulti(ifma); 3254 error = ENOMEM; 3255 goto free_llsa_out; 3256 } 3257 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma, 3258 ifma_link); 3259 } else 3260 ll_ifma->ifma_refcount++; 3261 ifma->ifma_llifma = ll_ifma; 3262 } 3263 3264 /* 3265 * We now have a new multicast address, ifma, and possibly a new or 3266 * referenced link layer address. Add the primary address to the 3267 * ifnet address list. 3268 */ 3269 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 3270 3271 if (retifma != NULL) 3272 *retifma = ifma; 3273 3274 /* 3275 * Must generate the message while holding the lock so that 'ifma' 3276 * pointer is still valid. 3277 */ 3278 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 3279 IF_ADDR_WUNLOCK(ifp); 3280 3281 /* 3282 * We are certain we have added something, so call down to the 3283 * interface to let them know about it. 3284 */ 3285 if (ifp->if_ioctl != NULL) { 3286 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0); 3287 } 3288 3289 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3290 link_free_sdl(llsa); 3291 3292 return (0); 3293 3294 free_llsa_out: 3295 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3296 link_free_sdl(llsa); 3297 3298 unlock_out: 3299 IF_ADDR_WUNLOCK(ifp); 3300 return (error); 3301 } 3302 3303 /* 3304 * Delete a multicast group membership by network-layer group address. 3305 * 3306 * Returns ENOENT if the entry could not be found. If ifp no longer 3307 * exists, results are undefined. This entry point should only be used 3308 * from subsystems which do appropriate locking to hold ifp for the 3309 * duration of the call. 3310 * Network-layer protocol domains must use if_delmulti_ifma(). 3311 */ 3312 int 3313 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 3314 { 3315 struct ifmultiaddr *ifma; 3316 int lastref; 3317 #ifdef INVARIANTS 3318 struct ifnet *oifp; 3319 3320 IFNET_RLOCK_NOSLEEP(); 3321 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3322 if (ifp == oifp) 3323 break; 3324 if (ifp != oifp) 3325 ifp = NULL; 3326 IFNET_RUNLOCK_NOSLEEP(); 3327 3328 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__)); 3329 #endif 3330 if (ifp == NULL) 3331 return (ENOENT); 3332 3333 IF_ADDR_WLOCK(ifp); 3334 lastref = 0; 3335 ifma = if_findmulti(ifp, sa); 3336 if (ifma != NULL) 3337 lastref = if_delmulti_locked(ifp, ifma, 0); 3338 IF_ADDR_WUNLOCK(ifp); 3339 3340 if (ifma == NULL) 3341 return (ENOENT); 3342 3343 if (lastref && ifp->if_ioctl != NULL) { 3344 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3345 } 3346 3347 return (0); 3348 } 3349 3350 /* 3351 * Delete all multicast group membership for an interface. 3352 * Should be used to quickly flush all multicast filters. 3353 */ 3354 void 3355 if_delallmulti(struct ifnet *ifp) 3356 { 3357 struct ifmultiaddr *ifma; 3358 struct ifmultiaddr *next; 3359 3360 IF_ADDR_WLOCK(ifp); 3361 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 3362 if_delmulti_locked(ifp, ifma, 0); 3363 IF_ADDR_WUNLOCK(ifp); 3364 } 3365 3366 /* 3367 * Delete a multicast group membership by group membership pointer. 3368 * Network-layer protocol domains must use this routine. 3369 * 3370 * It is safe to call this routine if the ifp disappeared. 3371 */ 3372 void 3373 if_delmulti_ifma(struct ifmultiaddr *ifma) 3374 { 3375 struct ifnet *ifp; 3376 int lastref; 3377 3378 ifp = ifma->ifma_ifp; 3379 #ifdef DIAGNOSTIC 3380 if (ifp == NULL) { 3381 printf("%s: ifma_ifp seems to be detached\n", __func__); 3382 } else { 3383 struct ifnet *oifp; 3384 3385 IFNET_RLOCK_NOSLEEP(); 3386 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3387 if (ifp == oifp) 3388 break; 3389 if (ifp != oifp) { 3390 printf("%s: ifnet %p disappeared\n", __func__, ifp); 3391 ifp = NULL; 3392 } 3393 IFNET_RUNLOCK_NOSLEEP(); 3394 } 3395 #endif 3396 /* 3397 * If and only if the ifnet instance exists: Acquire the address lock. 3398 */ 3399 if (ifp != NULL) 3400 IF_ADDR_WLOCK(ifp); 3401 3402 lastref = if_delmulti_locked(ifp, ifma, 0); 3403 3404 if (ifp != NULL) { 3405 /* 3406 * If and only if the ifnet instance exists: 3407 * Release the address lock. 3408 * If the group was left: update the hardware hash filter. 3409 */ 3410 IF_ADDR_WUNLOCK(ifp); 3411 if (lastref && ifp->if_ioctl != NULL) { 3412 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3413 } 3414 } 3415 } 3416 3417 /* 3418 * Perform deletion of network-layer and/or link-layer multicast address. 3419 * 3420 * Return 0 if the reference count was decremented. 3421 * Return 1 if the final reference was released, indicating that the 3422 * hardware hash filter should be reprogrammed. 3423 */ 3424 static int 3425 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching) 3426 { 3427 struct ifmultiaddr *ll_ifma; 3428 3429 if (ifp != NULL && ifma->ifma_ifp != NULL) { 3430 KASSERT(ifma->ifma_ifp == ifp, 3431 ("%s: inconsistent ifp %p", __func__, ifp)); 3432 IF_ADDR_WLOCK_ASSERT(ifp); 3433 } 3434 3435 ifp = ifma->ifma_ifp; 3436 3437 /* 3438 * If the ifnet is detaching, null out references to ifnet, 3439 * so that upper protocol layers will notice, and not attempt 3440 * to obtain locks for an ifnet which no longer exists. The 3441 * routing socket announcement must happen before the ifnet 3442 * instance is detached from the system. 3443 */ 3444 if (detaching) { 3445 #ifdef DIAGNOSTIC 3446 printf("%s: detaching ifnet instance %p\n", __func__, ifp); 3447 #endif 3448 /* 3449 * ifp may already be nulled out if we are being reentered 3450 * to delete the ll_ifma. 3451 */ 3452 if (ifp != NULL) { 3453 rt_newmaddrmsg(RTM_DELMADDR, ifma); 3454 ifma->ifma_ifp = NULL; 3455 } 3456 } 3457 3458 if (--ifma->ifma_refcount > 0) 3459 return 0; 3460 3461 /* 3462 * If this ifma is a network-layer ifma, a link-layer ifma may 3463 * have been associated with it. Release it first if so. 3464 */ 3465 ll_ifma = ifma->ifma_llifma; 3466 if (ll_ifma != NULL) { 3467 KASSERT(ifma->ifma_lladdr != NULL, 3468 ("%s: llifma w/o lladdr", __func__)); 3469 if (detaching) 3470 ll_ifma->ifma_ifp = NULL; /* XXX */ 3471 if (--ll_ifma->ifma_refcount == 0) { 3472 if (ifp != NULL) { 3473 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, 3474 ifma_link); 3475 } 3476 if_freemulti(ll_ifma); 3477 } 3478 } 3479 3480 if (ifp != NULL) 3481 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 3482 3483 if_freemulti(ifma); 3484 3485 /* 3486 * The last reference to this instance of struct ifmultiaddr 3487 * was released; the hardware should be notified of this change. 3488 */ 3489 return 1; 3490 } 3491 3492 /* 3493 * Set the link layer address on an interface. 3494 * 3495 * At this time we only support certain types of interfaces, 3496 * and we don't allow the length of the address to change. 3497 * 3498 * Set noinline to be dtrace-friendly 3499 */ 3500 __noinline int 3501 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 3502 { 3503 struct sockaddr_dl *sdl; 3504 struct ifaddr *ifa; 3505 struct ifreq ifr; 3506 3507 IF_ADDR_RLOCK(ifp); 3508 ifa = ifp->if_addr; 3509 if (ifa == NULL) { 3510 IF_ADDR_RUNLOCK(ifp); 3511 return (EINVAL); 3512 } 3513 ifa_ref(ifa); 3514 IF_ADDR_RUNLOCK(ifp); 3515 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 3516 if (sdl == NULL) { 3517 ifa_free(ifa); 3518 return (EINVAL); 3519 } 3520 if (len != sdl->sdl_alen) { /* don't allow length to change */ 3521 ifa_free(ifa); 3522 return (EINVAL); 3523 } 3524 switch (ifp->if_type) { 3525 case IFT_ETHER: 3526 case IFT_FDDI: 3527 case IFT_XETHER: 3528 case IFT_ISO88025: 3529 case IFT_L2VLAN: 3530 case IFT_BRIDGE: 3531 case IFT_ARCNET: 3532 case IFT_IEEE8023ADLAG: 3533 bcopy(lladdr, LLADDR(sdl), len); 3534 ifa_free(ifa); 3535 break; 3536 default: 3537 ifa_free(ifa); 3538 return (ENODEV); 3539 } 3540 3541 /* 3542 * If the interface is already up, we need 3543 * to re-init it in order to reprogram its 3544 * address filter. 3545 */ 3546 if ((ifp->if_flags & IFF_UP) != 0) { 3547 if (ifp->if_ioctl) { 3548 ifp->if_flags &= ~IFF_UP; 3549 ifr.ifr_flags = ifp->if_flags & 0xffff; 3550 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3551 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3552 ifp->if_flags |= IFF_UP; 3553 ifr.ifr_flags = ifp->if_flags & 0xffff; 3554 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3555 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3556 } 3557 } 3558 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 3559 return (0); 3560 } 3561 3562 /* 3563 * Compat function for handling basic encapsulation requests. 3564 * Not converted stacks (FDDI, IB, ..) supports traditional 3565 * output model: ARP (and other similar L2 protocols) are handled 3566 * inside output routine, arpresolve/nd6_resolve() returns MAC 3567 * address instead of full prepend. 3568 * 3569 * This function creates calculated header==MAC for IPv4/IPv6 and 3570 * returns EAFNOSUPPORT (which is then handled in ARP code) for other 3571 * address families. 3572 */ 3573 static int 3574 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req) 3575 { 3576 3577 if (req->rtype != IFENCAP_LL) 3578 return (EOPNOTSUPP); 3579 3580 if (req->bufsize < req->lladdr_len) 3581 return (ENOMEM); 3582 3583 switch (req->family) { 3584 case AF_INET: 3585 case AF_INET6: 3586 break; 3587 default: 3588 return (EAFNOSUPPORT); 3589 } 3590 3591 /* Copy lladdr to storage as is */ 3592 memmove(req->buf, req->lladdr, req->lladdr_len); 3593 req->bufsize = req->lladdr_len; 3594 req->lladdr_off = 0; 3595 3596 return (0); 3597 } 3598 3599 /* 3600 * Get the link layer address that was read from the hardware at attach. 3601 * 3602 * This is only set by Ethernet NICs (IFT_ETHER), but laggX interfaces re-type 3603 * their component interfaces as IFT_IEEE8023ADLAG. 3604 */ 3605 int 3606 if_gethwaddr(struct ifnet *ifp, struct ifreq *ifr) 3607 { 3608 3609 if (ifp->if_hw_addr == NULL) 3610 return (ENODEV); 3611 3612 switch (ifp->if_type) { 3613 case IFT_ETHER: 3614 case IFT_IEEE8023ADLAG: 3615 bcopy(ifp->if_hw_addr, ifr->ifr_addr.sa_data, ifp->if_addrlen); 3616 return (0); 3617 default: 3618 return (ENODEV); 3619 } 3620 } 3621 3622 /* 3623 * The name argument must be a pointer to storage which will last as 3624 * long as the interface does. For physical devices, the result of 3625 * device_get_name(dev) is a good choice and for pseudo-devices a 3626 * static string works well. 3627 */ 3628 void 3629 if_initname(struct ifnet *ifp, const char *name, int unit) 3630 { 3631 ifp->if_dname = name; 3632 ifp->if_dunit = unit; 3633 if (unit != IF_DUNIT_NONE) 3634 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 3635 else 3636 strlcpy(ifp->if_xname, name, IFNAMSIZ); 3637 } 3638 3639 int 3640 if_printf(struct ifnet *ifp, const char * fmt, ...) 3641 { 3642 va_list ap; 3643 int retval; 3644 3645 retval = printf("%s: ", ifp->if_xname); 3646 va_start(ap, fmt); 3647 retval += vprintf(fmt, ap); 3648 va_end(ap); 3649 return (retval); 3650 } 3651 3652 void 3653 if_start(struct ifnet *ifp) 3654 { 3655 3656 (*(ifp)->if_start)(ifp); 3657 } 3658 3659 /* 3660 * Backwards compatibility interface for drivers 3661 * that have not implemented it 3662 */ 3663 static int 3664 if_transmit(struct ifnet *ifp, struct mbuf *m) 3665 { 3666 int error; 3667 3668 IFQ_HANDOFF(ifp, m, error); 3669 return (error); 3670 } 3671 3672 static void 3673 if_input_default(struct ifnet *ifp __unused, struct mbuf *m) 3674 { 3675 3676 m_freem(m); 3677 } 3678 3679 int 3680 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust) 3681 { 3682 int active = 0; 3683 3684 IF_LOCK(ifq); 3685 if (_IF_QFULL(ifq)) { 3686 IF_UNLOCK(ifq); 3687 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1); 3688 m_freem(m); 3689 return (0); 3690 } 3691 if (ifp != NULL) { 3692 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust); 3693 if (m->m_flags & (M_BCAST|M_MCAST)) 3694 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 3695 active = ifp->if_drv_flags & IFF_DRV_OACTIVE; 3696 } 3697 _IF_ENQUEUE(ifq, m); 3698 IF_UNLOCK(ifq); 3699 if (ifp != NULL && !active) 3700 (*(ifp)->if_start)(ifp); 3701 return (1); 3702 } 3703 3704 void 3705 if_register_com_alloc(u_char type, 3706 if_com_alloc_t *a, if_com_free_t *f) 3707 { 3708 3709 KASSERT(if_com_alloc[type] == NULL, 3710 ("if_register_com_alloc: %d already registered", type)); 3711 KASSERT(if_com_free[type] == NULL, 3712 ("if_register_com_alloc: %d free already registered", type)); 3713 3714 if_com_alloc[type] = a; 3715 if_com_free[type] = f; 3716 } 3717 3718 void 3719 if_deregister_com_alloc(u_char type) 3720 { 3721 3722 KASSERT(if_com_alloc[type] != NULL, 3723 ("if_deregister_com_alloc: %d not registered", type)); 3724 KASSERT(if_com_free[type] != NULL, 3725 ("if_deregister_com_alloc: %d free not registered", type)); 3726 if_com_alloc[type] = NULL; 3727 if_com_free[type] = NULL; 3728 } 3729 3730 /* API for driver access to network stack owned ifnet.*/ 3731 uint64_t 3732 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate) 3733 { 3734 uint64_t oldbrate; 3735 3736 oldbrate = ifp->if_baudrate; 3737 ifp->if_baudrate = baudrate; 3738 return (oldbrate); 3739 } 3740 3741 uint64_t 3742 if_getbaudrate(if_t ifp) 3743 { 3744 3745 return (((struct ifnet *)ifp)->if_baudrate); 3746 } 3747 3748 int 3749 if_setcapabilities(if_t ifp, int capabilities) 3750 { 3751 ((struct ifnet *)ifp)->if_capabilities = capabilities; 3752 return (0); 3753 } 3754 3755 int 3756 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit) 3757 { 3758 ((struct ifnet *)ifp)->if_capabilities |= setbit; 3759 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit; 3760 3761 return (0); 3762 } 3763 3764 int 3765 if_getcapabilities(if_t ifp) 3766 { 3767 return ((struct ifnet *)ifp)->if_capabilities; 3768 } 3769 3770 int 3771 if_setcapenable(if_t ifp, int capabilities) 3772 { 3773 ((struct ifnet *)ifp)->if_capenable = capabilities; 3774 return (0); 3775 } 3776 3777 int 3778 if_setcapenablebit(if_t ifp, int setcap, int clearcap) 3779 { 3780 if(setcap) 3781 ((struct ifnet *)ifp)->if_capenable |= setcap; 3782 if(clearcap) 3783 ((struct ifnet *)ifp)->if_capenable &= ~clearcap; 3784 3785 return (0); 3786 } 3787 3788 const char * 3789 if_getdname(if_t ifp) 3790 { 3791 return ((struct ifnet *)ifp)->if_dname; 3792 } 3793 3794 int 3795 if_togglecapenable(if_t ifp, int togglecap) 3796 { 3797 ((struct ifnet *)ifp)->if_capenable ^= togglecap; 3798 return (0); 3799 } 3800 3801 int 3802 if_getcapenable(if_t ifp) 3803 { 3804 return ((struct ifnet *)ifp)->if_capenable; 3805 } 3806 3807 /* 3808 * This is largely undesirable because it ties ifnet to a device, but does 3809 * provide flexiblity for an embedded product vendor. Should be used with 3810 * the understanding that it violates the interface boundaries, and should be 3811 * a last resort only. 3812 */ 3813 int 3814 if_setdev(if_t ifp, void *dev) 3815 { 3816 return (0); 3817 } 3818 3819 int 3820 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags) 3821 { 3822 ((struct ifnet *)ifp)->if_drv_flags |= set_flags; 3823 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags; 3824 3825 return (0); 3826 } 3827 3828 int 3829 if_getdrvflags(if_t ifp) 3830 { 3831 return ((struct ifnet *)ifp)->if_drv_flags; 3832 } 3833 3834 int 3835 if_setdrvflags(if_t ifp, int flags) 3836 { 3837 ((struct ifnet *)ifp)->if_drv_flags = flags; 3838 return (0); 3839 } 3840 3841 3842 int 3843 if_setflags(if_t ifp, int flags) 3844 { 3845 ((struct ifnet *)ifp)->if_flags = flags; 3846 return (0); 3847 } 3848 3849 int 3850 if_setflagbits(if_t ifp, int set, int clear) 3851 { 3852 ((struct ifnet *)ifp)->if_flags |= set; 3853 ((struct ifnet *)ifp)->if_flags &= ~clear; 3854 3855 return (0); 3856 } 3857 3858 int 3859 if_getflags(if_t ifp) 3860 { 3861 return ((struct ifnet *)ifp)->if_flags; 3862 } 3863 3864 int 3865 if_clearhwassist(if_t ifp) 3866 { 3867 ((struct ifnet *)ifp)->if_hwassist = 0; 3868 return (0); 3869 } 3870 3871 int 3872 if_sethwassistbits(if_t ifp, int toset, int toclear) 3873 { 3874 ((struct ifnet *)ifp)->if_hwassist |= toset; 3875 ((struct ifnet *)ifp)->if_hwassist &= ~toclear; 3876 3877 return (0); 3878 } 3879 3880 int 3881 if_sethwassist(if_t ifp, int hwassist_bit) 3882 { 3883 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit; 3884 return (0); 3885 } 3886 3887 int 3888 if_gethwassist(if_t ifp) 3889 { 3890 return ((struct ifnet *)ifp)->if_hwassist; 3891 } 3892 3893 int 3894 if_setmtu(if_t ifp, int mtu) 3895 { 3896 ((struct ifnet *)ifp)->if_mtu = mtu; 3897 return (0); 3898 } 3899 3900 int 3901 if_getmtu(if_t ifp) 3902 { 3903 return ((struct ifnet *)ifp)->if_mtu; 3904 } 3905 3906 int 3907 if_getmtu_family(if_t ifp, int family) 3908 { 3909 struct domain *dp; 3910 3911 for (dp = domains; dp; dp = dp->dom_next) { 3912 if (dp->dom_family == family && dp->dom_ifmtu != NULL) 3913 return (dp->dom_ifmtu((struct ifnet *)ifp)); 3914 } 3915 3916 return (((struct ifnet *)ifp)->if_mtu); 3917 } 3918 3919 int 3920 if_setsoftc(if_t ifp, void *softc) 3921 { 3922 ((struct ifnet *)ifp)->if_softc = softc; 3923 return (0); 3924 } 3925 3926 void * 3927 if_getsoftc(if_t ifp) 3928 { 3929 return ((struct ifnet *)ifp)->if_softc; 3930 } 3931 3932 void 3933 if_setrcvif(struct mbuf *m, if_t ifp) 3934 { 3935 m->m_pkthdr.rcvif = (struct ifnet *)ifp; 3936 } 3937 3938 void 3939 if_setvtag(struct mbuf *m, uint16_t tag) 3940 { 3941 m->m_pkthdr.ether_vtag = tag; 3942 } 3943 3944 uint16_t 3945 if_getvtag(struct mbuf *m) 3946 { 3947 3948 return (m->m_pkthdr.ether_vtag); 3949 } 3950 3951 int 3952 if_sendq_empty(if_t ifp) 3953 { 3954 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd); 3955 } 3956 3957 struct ifaddr * 3958 if_getifaddr(if_t ifp) 3959 { 3960 return ((struct ifnet *)ifp)->if_addr; 3961 } 3962 3963 int 3964 if_getamcount(if_t ifp) 3965 { 3966 return ((struct ifnet *)ifp)->if_amcount; 3967 } 3968 3969 3970 int 3971 if_setsendqready(if_t ifp) 3972 { 3973 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd); 3974 return (0); 3975 } 3976 3977 int 3978 if_setsendqlen(if_t ifp, int tx_desc_count) 3979 { 3980 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count); 3981 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count; 3982 3983 return (0); 3984 } 3985 3986 int 3987 if_vlantrunkinuse(if_t ifp) 3988 { 3989 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0; 3990 } 3991 3992 int 3993 if_input(if_t ifp, struct mbuf* sendmp) 3994 { 3995 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp); 3996 return (0); 3997 3998 } 3999 4000 /* XXX */ 4001 #ifndef ETH_ADDR_LEN 4002 #define ETH_ADDR_LEN 6 4003 #endif 4004 4005 int 4006 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max) 4007 { 4008 struct ifmultiaddr *ifma; 4009 uint8_t *lmta = (uint8_t *)mta; 4010 int mcnt = 0; 4011 4012 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 4013 if (ifma->ifma_addr->sa_family != AF_LINK) 4014 continue; 4015 4016 if (mcnt == max) 4017 break; 4018 4019 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 4020 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN); 4021 mcnt++; 4022 } 4023 *cnt = mcnt; 4024 4025 return (0); 4026 } 4027 4028 int 4029 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max) 4030 { 4031 int error; 4032 4033 if_maddr_rlock(ifp); 4034 error = if_setupmultiaddr(ifp, mta, cnt, max); 4035 if_maddr_runlock(ifp); 4036 return (error); 4037 } 4038 4039 int 4040 if_multiaddr_count(if_t ifp, int max) 4041 { 4042 struct ifmultiaddr *ifma; 4043 int count; 4044 4045 count = 0; 4046 if_maddr_rlock(ifp); 4047 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 4048 if (ifma->ifma_addr->sa_family != AF_LINK) 4049 continue; 4050 count++; 4051 if (count == max) 4052 break; 4053 } 4054 if_maddr_runlock(ifp); 4055 return (count); 4056 } 4057 4058 int 4059 if_multi_apply(struct ifnet *ifp, int (*filter)(void *, struct ifmultiaddr *, int), void *arg) 4060 { 4061 struct ifmultiaddr *ifma; 4062 int cnt = 0; 4063 4064 if_maddr_rlock(ifp); 4065 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 4066 cnt += filter(arg, ifma, cnt); 4067 if_maddr_runlock(ifp); 4068 return (cnt); 4069 } 4070 4071 struct mbuf * 4072 if_dequeue(if_t ifp) 4073 { 4074 struct mbuf *m; 4075 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m); 4076 4077 return (m); 4078 } 4079 4080 int 4081 if_sendq_prepend(if_t ifp, struct mbuf *m) 4082 { 4083 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m); 4084 return (0); 4085 } 4086 4087 int 4088 if_setifheaderlen(if_t ifp, int len) 4089 { 4090 ((struct ifnet *)ifp)->if_hdrlen = len; 4091 return (0); 4092 } 4093 4094 caddr_t 4095 if_getlladdr(if_t ifp) 4096 { 4097 return (IF_LLADDR((struct ifnet *)ifp)); 4098 } 4099 4100 void * 4101 if_gethandle(u_char type) 4102 { 4103 return (if_alloc(type)); 4104 } 4105 4106 void 4107 if_bpfmtap(if_t ifh, struct mbuf *m) 4108 { 4109 struct ifnet *ifp = (struct ifnet *)ifh; 4110 4111 BPF_MTAP(ifp, m); 4112 } 4113 4114 void 4115 if_etherbpfmtap(if_t ifh, struct mbuf *m) 4116 { 4117 struct ifnet *ifp = (struct ifnet *)ifh; 4118 4119 ETHER_BPF_MTAP(ifp, m); 4120 } 4121 4122 void 4123 if_vlancap(if_t ifh) 4124 { 4125 struct ifnet *ifp = (struct ifnet *)ifh; 4126 VLAN_CAPABILITIES(ifp); 4127 } 4128 4129 int 4130 if_sethwtsomax(if_t ifp, u_int if_hw_tsomax) 4131 { 4132 4133 ((struct ifnet *)ifp)->if_hw_tsomax = if_hw_tsomax; 4134 return (0); 4135 } 4136 4137 int 4138 if_sethwtsomaxsegcount(if_t ifp, u_int if_hw_tsomaxsegcount) 4139 { 4140 4141 ((struct ifnet *)ifp)->if_hw_tsomaxsegcount = if_hw_tsomaxsegcount; 4142 return (0); 4143 } 4144 4145 int 4146 if_sethwtsomaxsegsize(if_t ifp, u_int if_hw_tsomaxsegsize) 4147 { 4148 4149 ((struct ifnet *)ifp)->if_hw_tsomaxsegsize = if_hw_tsomaxsegsize; 4150 return (0); 4151 } 4152 4153 u_int 4154 if_gethwtsomax(if_t ifp) 4155 { 4156 4157 return (((struct ifnet *)ifp)->if_hw_tsomax); 4158 } 4159 4160 u_int 4161 if_gethwtsomaxsegcount(if_t ifp) 4162 { 4163 4164 return (((struct ifnet *)ifp)->if_hw_tsomaxsegcount); 4165 } 4166 4167 u_int 4168 if_gethwtsomaxsegsize(if_t ifp) 4169 { 4170 4171 return (((struct ifnet *)ifp)->if_hw_tsomaxsegsize); 4172 } 4173 4174 void 4175 if_setinitfn(if_t ifp, void (*init_fn)(void *)) 4176 { 4177 ((struct ifnet *)ifp)->if_init = init_fn; 4178 } 4179 4180 void 4181 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t)) 4182 { 4183 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn; 4184 } 4185 4186 void 4187 if_setstartfn(if_t ifp, void (*start_fn)(if_t)) 4188 { 4189 ((struct ifnet *)ifp)->if_start = (void *)start_fn; 4190 } 4191 4192 void 4193 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn) 4194 { 4195 ((struct ifnet *)ifp)->if_transmit = start_fn; 4196 } 4197 4198 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn) 4199 { 4200 ((struct ifnet *)ifp)->if_qflush = flush_fn; 4201 4202 } 4203 4204 void 4205 if_setgetcounterfn(if_t ifp, if_get_counter_t fn) 4206 { 4207 4208 ifp->if_get_counter = fn; 4209 } 4210 4211 /* Revisit these - These are inline functions originally. */ 4212 int 4213 drbr_inuse_drv(if_t ifh, struct buf_ring *br) 4214 { 4215 return drbr_inuse(ifh, br); 4216 } 4217 4218 struct mbuf* 4219 drbr_dequeue_drv(if_t ifh, struct buf_ring *br) 4220 { 4221 return drbr_dequeue(ifh, br); 4222 } 4223 4224 int 4225 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br) 4226 { 4227 return drbr_needs_enqueue(ifh, br); 4228 } 4229 4230 int 4231 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m) 4232 { 4233 return drbr_enqueue(ifh, br, m); 4234 4235 } 4236