if.c revision 1.362
1 /* $NetBSD: if.c,v 1.362 2016/11/15 01:50:06 ozaki-r Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2000, 2001, 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by William Studenmund and Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the project nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 */ 60 61 /* 62 * Copyright (c) 1980, 1986, 1993 63 * The Regents of the University of California. All rights reserved. 64 * 65 * Redistribution and use in source and binary forms, with or without 66 * modification, are permitted provided that the following conditions 67 * are met: 68 * 1. Redistributions of source code must retain the above copyright 69 * notice, this list of conditions and the following disclaimer. 70 * 2. Redistributions in binary form must reproduce the above copyright 71 * notice, this list of conditions and the following disclaimer in the 72 * documentation and/or other materials provided with the distribution. 73 * 3. Neither the name of the University nor the names of its contributors 74 * may be used to endorse or promote products derived from this software 75 * without specific prior written permission. 76 * 77 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 78 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 79 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 80 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 81 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 82 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 83 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 84 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 85 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 86 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 87 * SUCH DAMAGE. 88 * 89 * @(#)if.c 8.5 (Berkeley) 1/9/95 90 */ 91 92 #include <sys/cdefs.h> 93 __KERNEL_RCSID(0, "$NetBSD: if.c,v 1.362 2016/11/15 01:50:06 ozaki-r Exp $"); 94 95 #if defined(_KERNEL_OPT) 96 #include "opt_inet.h" 97 #include "opt_ipsec.h" 98 99 #include "opt_atalk.h" 100 #include "opt_natm.h" 101 #include "opt_wlan.h" 102 #include "opt_net_mpsafe.h" 103 #endif 104 105 #include <sys/param.h> 106 #include <sys/mbuf.h> 107 #include <sys/systm.h> 108 #include <sys/callout.h> 109 #include <sys/proc.h> 110 #include <sys/socket.h> 111 #include <sys/socketvar.h> 112 #include <sys/domain.h> 113 #include <sys/protosw.h> 114 #include <sys/kernel.h> 115 #include <sys/ioctl.h> 116 #include <sys/sysctl.h> 117 #include <sys/syslog.h> 118 #include <sys/kauth.h> 119 #include <sys/kmem.h> 120 #include <sys/xcall.h> 121 #include <sys/cpu.h> 122 #include <sys/intr.h> 123 124 #include <net/if.h> 125 #include <net/if_dl.h> 126 #include <net/if_ether.h> 127 #include <net/if_media.h> 128 #include <net80211/ieee80211.h> 129 #include <net80211/ieee80211_ioctl.h> 130 #include <net/if_types.h> 131 #include <net/route.h> 132 #include <net/netisr.h> 133 #include <sys/module.h> 134 #ifdef NETATALK 135 #include <netatalk/at_extern.h> 136 #include <netatalk/at.h> 137 #endif 138 #include <net/pfil.h> 139 #include <netinet/in.h> 140 #include <netinet/in_var.h> 141 #ifndef IPSEC 142 #include <netinet/ip_encap.h> 143 #endif 144 145 #ifdef INET6 146 #include <netinet6/in6_var.h> 147 #include <netinet6/nd6.h> 148 #endif 149 150 #include "ether.h" 151 #include "fddi.h" 152 #include "token.h" 153 154 #include "carp.h" 155 #if NCARP > 0 156 #include <netinet/ip_carp.h> 157 #endif 158 159 #include <compat/sys/sockio.h> 160 #include <compat/sys/socket.h> 161 162 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 163 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 164 165 /* 166 * Global list of interfaces. 167 */ 168 /* DEPRECATED. Remove it once kvm(3) users disappeared */ 169 struct ifnet_head ifnet_list; 170 171 struct pslist_head ifnet_pslist; 172 static ifnet_t ** ifindex2ifnet = NULL; 173 static u_int if_index = 1; 174 static size_t if_indexlim = 0; 175 static uint64_t index_gen; 176 /* Mutex to protect the above objects. */ 177 kmutex_t ifnet_mtx __cacheline_aligned; 178 struct psref_class *ifnet_psref_class __read_mostly; 179 static pserialize_t ifnet_psz; 180 181 static kmutex_t if_clone_mtx; 182 183 struct ifnet *lo0ifp; 184 int ifqmaxlen = IFQ_MAXLEN; 185 186 struct psref_class *ifa_psref_class __read_mostly; 187 188 static int if_delroute_matcher(struct rtentry *, void *); 189 190 static struct if_clone *if_clone_lookup(const char *, int *); 191 192 static LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners); 193 static int if_cloners_count; 194 195 /* Packet filtering hook for interfaces. */ 196 pfil_head_t * if_pfil; 197 198 static kauth_listener_t if_listener; 199 200 static int doifioctl(struct socket *, u_long, void *, struct lwp *); 201 static void if_detach_queues(struct ifnet *, struct ifqueue *); 202 static void sysctl_sndq_setup(struct sysctllog **, const char *, 203 struct ifaltq *); 204 static void if_slowtimo(void *); 205 static void if_free_sadl(struct ifnet *); 206 static void if_attachdomain1(struct ifnet *); 207 static int ifconf(u_long, void *); 208 static int if_transmit(struct ifnet *, struct mbuf *); 209 static int if_clone_create(const char *); 210 static int if_clone_destroy(const char *); 211 static void if_link_state_change_si(void *); 212 213 struct if_percpuq { 214 struct ifnet *ipq_ifp; 215 void *ipq_si; 216 struct percpu *ipq_ifqs; /* struct ifqueue */ 217 }; 218 219 static struct mbuf *if_percpuq_dequeue(struct if_percpuq *); 220 221 static void if_percpuq_drops(void *, void *, struct cpu_info *); 222 static int sysctl_percpuq_drops_handler(SYSCTLFN_PROTO); 223 static void sysctl_percpuq_setup(struct sysctllog **, const char *, 224 struct if_percpuq *); 225 226 #if defined(INET) || defined(INET6) 227 static void sysctl_net_pktq_setup(struct sysctllog **, int); 228 #endif 229 230 /* 231 * Pointer to stub or real compat_cvtcmd() depending on presence of 232 * the compat module 233 */ 234 u_long stub_compat_cvtcmd(u_long); 235 u_long (*vec_compat_cvtcmd)(u_long) = stub_compat_cvtcmd; 236 237 /* Similarly, pointer to compat_ifioctl() if it is present */ 238 239 int (*vec_compat_ifioctl)(struct socket *, u_long, u_long, void *, 240 struct lwp *) = NULL; 241 242 /* The stub version of compat_cvtcmd() */ 243 u_long stub_compat_cvtcmd(u_long cmd) 244 { 245 246 return cmd; 247 } 248 249 static int 250 if_listener_cb(kauth_cred_t cred, kauth_action_t action, void *cookie, 251 void *arg0, void *arg1, void *arg2, void *arg3) 252 { 253 int result; 254 enum kauth_network_req req; 255 256 result = KAUTH_RESULT_DEFER; 257 req = (enum kauth_network_req)arg1; 258 259 if (action != KAUTH_NETWORK_INTERFACE) 260 return result; 261 262 if ((req == KAUTH_REQ_NETWORK_INTERFACE_GET) || 263 (req == KAUTH_REQ_NETWORK_INTERFACE_SET)) 264 result = KAUTH_RESULT_ALLOW; 265 266 return result; 267 } 268 269 /* 270 * Network interface utility routines. 271 * 272 * Routines with ifa_ifwith* names take sockaddr *'s as 273 * parameters. 274 */ 275 void 276 ifinit(void) 277 { 278 #if defined(INET) 279 sysctl_net_pktq_setup(NULL, PF_INET); 280 #endif 281 #ifdef INET6 282 if (in6_present) 283 sysctl_net_pktq_setup(NULL, PF_INET6); 284 #endif 285 286 #if (defined(INET) || defined(INET6)) && !defined(IPSEC) 287 encapinit(); 288 #endif 289 290 if_listener = kauth_listen_scope(KAUTH_SCOPE_NETWORK, 291 if_listener_cb, NULL); 292 293 /* interfaces are available, inform socket code */ 294 ifioctl = doifioctl; 295 } 296 297 /* 298 * XXX Initialization before configure(). 299 * XXX hack to get pfil_add_hook working in autoconf. 300 */ 301 void 302 ifinit1(void) 303 { 304 mutex_init(&if_clone_mtx, MUTEX_DEFAULT, IPL_NONE); 305 306 TAILQ_INIT(&ifnet_list); 307 mutex_init(&ifnet_mtx, MUTEX_DEFAULT, IPL_NONE); 308 ifnet_psz = pserialize_create(); 309 ifnet_psref_class = psref_class_create("ifnet", IPL_SOFTNET); 310 ifa_psref_class = psref_class_create("ifa", IPL_SOFTNET); 311 PSLIST_INIT(&ifnet_pslist); 312 313 if_indexlim = 8; 314 315 if_pfil = pfil_head_create(PFIL_TYPE_IFNET, NULL); 316 KASSERT(if_pfil != NULL); 317 318 #if NETHER > 0 || NFDDI > 0 || defined(NETATALK) || NTOKEN > 0 || defined(WLAN) 319 etherinit(); 320 #endif 321 } 322 323 ifnet_t * 324 if_alloc(u_char type) 325 { 326 return kmem_zalloc(sizeof(ifnet_t), KM_SLEEP); 327 } 328 329 void 330 if_free(ifnet_t *ifp) 331 { 332 kmem_free(ifp, sizeof(ifnet_t)); 333 } 334 335 void 336 if_initname(struct ifnet *ifp, const char *name, int unit) 337 { 338 (void)snprintf(ifp->if_xname, sizeof(ifp->if_xname), 339 "%s%d", name, unit); 340 } 341 342 /* 343 * Null routines used while an interface is going away. These routines 344 * just return an error. 345 */ 346 347 int 348 if_nulloutput(struct ifnet *ifp, struct mbuf *m, 349 const struct sockaddr *so, const struct rtentry *rt) 350 { 351 352 return ENXIO; 353 } 354 355 void 356 if_nullinput(struct ifnet *ifp, struct mbuf *m) 357 { 358 359 /* Nothing. */ 360 } 361 362 void 363 if_nullstart(struct ifnet *ifp) 364 { 365 366 /* Nothing. */ 367 } 368 369 int 370 if_nulltransmit(struct ifnet *ifp, struct mbuf *m) 371 { 372 373 return ENXIO; 374 } 375 376 int 377 if_nullioctl(struct ifnet *ifp, u_long cmd, void *data) 378 { 379 380 return ENXIO; 381 } 382 383 int 384 if_nullinit(struct ifnet *ifp) 385 { 386 387 return ENXIO; 388 } 389 390 void 391 if_nullstop(struct ifnet *ifp, int disable) 392 { 393 394 /* Nothing. */ 395 } 396 397 void 398 if_nullslowtimo(struct ifnet *ifp) 399 { 400 401 /* Nothing. */ 402 } 403 404 void 405 if_nulldrain(struct ifnet *ifp) 406 { 407 408 /* Nothing. */ 409 } 410 411 void 412 if_set_sadl(struct ifnet *ifp, const void *lla, u_char addrlen, bool factory) 413 { 414 struct ifaddr *ifa; 415 struct sockaddr_dl *sdl; 416 417 ifp->if_addrlen = addrlen; 418 if_alloc_sadl(ifp); 419 ifa = ifp->if_dl; 420 sdl = satosdl(ifa->ifa_addr); 421 422 (void)sockaddr_dl_setaddr(sdl, sdl->sdl_len, lla, ifp->if_addrlen); 423 if (factory) { 424 ifp->if_hwdl = ifp->if_dl; 425 ifaref(ifp->if_hwdl); 426 } 427 /* TBD routing socket */ 428 } 429 430 struct ifaddr * 431 if_dl_create(const struct ifnet *ifp, const struct sockaddr_dl **sdlp) 432 { 433 unsigned socksize, ifasize; 434 int addrlen, namelen; 435 struct sockaddr_dl *mask, *sdl; 436 struct ifaddr *ifa; 437 438 namelen = strlen(ifp->if_xname); 439 addrlen = ifp->if_addrlen; 440 socksize = roundup(sockaddr_dl_measure(namelen, addrlen), sizeof(long)); 441 ifasize = sizeof(*ifa) + 2 * socksize; 442 ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK|M_ZERO); 443 444 sdl = (struct sockaddr_dl *)(ifa + 1); 445 mask = (struct sockaddr_dl *)(socksize + (char *)sdl); 446 447 sockaddr_dl_init(sdl, socksize, ifp->if_index, ifp->if_type, 448 ifp->if_xname, namelen, NULL, addrlen); 449 mask->sdl_len = sockaddr_dl_measure(namelen, 0); 450 memset(&mask->sdl_data[0], 0xff, namelen); 451 ifa->ifa_rtrequest = link_rtrequest; 452 ifa->ifa_addr = (struct sockaddr *)sdl; 453 ifa->ifa_netmask = (struct sockaddr *)mask; 454 ifa_psref_init(ifa); 455 456 *sdlp = sdl; 457 458 return ifa; 459 } 460 461 static void 462 if_sadl_setrefs(struct ifnet *ifp, struct ifaddr *ifa) 463 { 464 const struct sockaddr_dl *sdl; 465 466 ifp->if_dl = ifa; 467 ifaref(ifa); 468 sdl = satosdl(ifa->ifa_addr); 469 ifp->if_sadl = sdl; 470 } 471 472 /* 473 * Allocate the link level name for the specified interface. This 474 * is an attachment helper. It must be called after ifp->if_addrlen 475 * is initialized, which may not be the case when if_attach() is 476 * called. 477 */ 478 void 479 if_alloc_sadl(struct ifnet *ifp) 480 { 481 struct ifaddr *ifa; 482 const struct sockaddr_dl *sdl; 483 484 /* 485 * If the interface already has a link name, release it 486 * now. This is useful for interfaces that can change 487 * link types, and thus switch link names often. 488 */ 489 if (ifp->if_sadl != NULL) 490 if_free_sadl(ifp); 491 492 ifa = if_dl_create(ifp, &sdl); 493 494 ifa_insert(ifp, ifa); 495 if_sadl_setrefs(ifp, ifa); 496 } 497 498 static void 499 if_deactivate_sadl(struct ifnet *ifp) 500 { 501 struct ifaddr *ifa; 502 503 KASSERT(ifp->if_dl != NULL); 504 505 ifa = ifp->if_dl; 506 507 ifp->if_sadl = NULL; 508 509 ifp->if_dl = NULL; 510 ifafree(ifa); 511 } 512 513 void 514 if_activate_sadl(struct ifnet *ifp, struct ifaddr *ifa0, 515 const struct sockaddr_dl *sdl) 516 { 517 int s, ss; 518 struct ifaddr *ifa; 519 int bound = curlwp_bind(); 520 521 s = splnet(); 522 523 if_deactivate_sadl(ifp); 524 525 if_sadl_setrefs(ifp, ifa0); 526 527 ss = pserialize_read_enter(); 528 IFADDR_READER_FOREACH(ifa, ifp) { 529 struct psref psref; 530 ifa_acquire(ifa, &psref); 531 pserialize_read_exit(ss); 532 533 rtinit(ifa, RTM_LLINFO_UPD, 0); 534 535 ss = pserialize_read_enter(); 536 ifa_release(ifa, &psref); 537 } 538 pserialize_read_exit(ss); 539 540 splx(s); 541 curlwp_bindx(bound); 542 } 543 544 /* 545 * Free the link level name for the specified interface. This is 546 * a detach helper. This is called from if_detach(). 547 */ 548 static void 549 if_free_sadl(struct ifnet *ifp) 550 { 551 struct ifaddr *ifa; 552 int s; 553 554 ifa = ifp->if_dl; 555 if (ifa == NULL) { 556 KASSERT(ifp->if_sadl == NULL); 557 return; 558 } 559 560 KASSERT(ifp->if_sadl != NULL); 561 562 s = splnet(); 563 rtinit(ifa, RTM_DELETE, 0); 564 ifa_remove(ifp, ifa); 565 if_deactivate_sadl(ifp); 566 if (ifp->if_hwdl == ifa) { 567 ifafree(ifa); 568 ifp->if_hwdl = NULL; 569 } 570 splx(s); 571 } 572 573 static void 574 if_getindex(ifnet_t *ifp) 575 { 576 bool hitlimit = false; 577 578 ifp->if_index_gen = index_gen++; 579 580 ifp->if_index = if_index; 581 if (ifindex2ifnet == NULL) { 582 if_index++; 583 goto skip; 584 } 585 while (if_byindex(ifp->if_index)) { 586 /* 587 * If we hit USHRT_MAX, we skip back to 0 since 588 * there are a number of places where the value 589 * of if_index or if_index itself is compared 590 * to or stored in an unsigned short. By 591 * jumping back, we won't botch those assignments 592 * or comparisons. 593 */ 594 if (++if_index == 0) { 595 if_index = 1; 596 } else if (if_index == USHRT_MAX) { 597 /* 598 * However, if we have to jump back to 599 * zero *twice* without finding an empty 600 * slot in ifindex2ifnet[], then there 601 * there are too many (>65535) interfaces. 602 */ 603 if (hitlimit) { 604 panic("too many interfaces"); 605 } 606 hitlimit = true; 607 if_index = 1; 608 } 609 ifp->if_index = if_index; 610 } 611 skip: 612 /* 613 * ifindex2ifnet is indexed by if_index. Since if_index will 614 * grow dynamically, it should grow too. 615 */ 616 if (ifindex2ifnet == NULL || ifp->if_index >= if_indexlim) { 617 size_t m, n, oldlim; 618 void *q; 619 620 oldlim = if_indexlim; 621 while (ifp->if_index >= if_indexlim) 622 if_indexlim <<= 1; 623 624 /* grow ifindex2ifnet */ 625 m = oldlim * sizeof(struct ifnet *); 626 n = if_indexlim * sizeof(struct ifnet *); 627 q = malloc(n, M_IFADDR, M_WAITOK|M_ZERO); 628 if (ifindex2ifnet != NULL) { 629 memcpy(q, ifindex2ifnet, m); 630 free(ifindex2ifnet, M_IFADDR); 631 } 632 ifindex2ifnet = (struct ifnet **)q; 633 } 634 ifindex2ifnet[ifp->if_index] = ifp; 635 } 636 637 /* 638 * Initialize an interface and assign an index for it. 639 * 640 * It must be called prior to a device specific attach routine 641 * (e.g., ether_ifattach and ieee80211_ifattach) or if_alloc_sadl, 642 * and be followed by if_register: 643 * 644 * if_initialize(ifp); 645 * ether_ifattach(ifp, enaddr); 646 * if_register(ifp); 647 */ 648 void 649 if_initialize(ifnet_t *ifp) 650 { 651 KASSERT(if_indexlim > 0); 652 TAILQ_INIT(&ifp->if_addrlist); 653 654 /* 655 * Link level name is allocated later by a separate call to 656 * if_alloc_sadl(). 657 */ 658 659 if (ifp->if_snd.ifq_maxlen == 0) 660 ifp->if_snd.ifq_maxlen = ifqmaxlen; 661 662 ifp->if_broadcastaddr = 0; /* reliably crash if used uninitialized */ 663 664 ifp->if_link_state = LINK_STATE_UNKNOWN; 665 ifp->if_link_queue = -1; /* all bits set, see link_state_change() */ 666 667 ifp->if_capenable = 0; 668 ifp->if_csum_flags_tx = 0; 669 ifp->if_csum_flags_rx = 0; 670 671 #ifdef ALTQ 672 ifp->if_snd.altq_type = 0; 673 ifp->if_snd.altq_disc = NULL; 674 ifp->if_snd.altq_flags &= ALTQF_CANTCHANGE; 675 ifp->if_snd.altq_tbr = NULL; 676 ifp->if_snd.altq_ifp = ifp; 677 #endif 678 679 IFQ_LOCK_INIT(&ifp->if_snd); 680 681 ifp->if_pfil = pfil_head_create(PFIL_TYPE_IFNET, ifp); 682 (void)pfil_run_hooks(if_pfil, 683 (struct mbuf **)PFIL_IFNET_ATTACH, ifp, PFIL_IFNET); 684 685 IF_AFDATA_LOCK_INIT(ifp); 686 687 if (if_is_link_state_changeable(ifp)) { 688 ifp->if_link_si = softint_establish(SOFTINT_NET, 689 if_link_state_change_si, ifp); 690 if (ifp->if_link_si == NULL) 691 panic("%s: softint_establish() failed", __func__); 692 } 693 694 PSLIST_ENTRY_INIT(ifp, if_pslist_entry); 695 PSLIST_INIT(&ifp->if_addr_pslist); 696 psref_target_init(&ifp->if_psref, ifnet_psref_class); 697 ifp->if_ioctl_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NONE); 698 699 IFNET_LOCK(); 700 if_getindex(ifp); 701 IFNET_UNLOCK(); 702 } 703 704 /* 705 * Register an interface to the list of "active" interfaces. 706 */ 707 void 708 if_register(ifnet_t *ifp) 709 { 710 /* 711 * If the driver has not supplied its own if_ioctl, then 712 * supply the default. 713 */ 714 if (ifp->if_ioctl == NULL) 715 ifp->if_ioctl = ifioctl_common; 716 717 sysctl_sndq_setup(&ifp->if_sysctl_log, ifp->if_xname, &ifp->if_snd); 718 719 if (!STAILQ_EMPTY(&domains)) 720 if_attachdomain1(ifp); 721 722 /* Announce the interface. */ 723 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 724 725 if (ifp->if_slowtimo != NULL) { 726 ifp->if_slowtimo_ch = 727 kmem_zalloc(sizeof(*ifp->if_slowtimo_ch), KM_SLEEP); 728 callout_init(ifp->if_slowtimo_ch, 0); 729 callout_setfunc(ifp->if_slowtimo_ch, if_slowtimo, ifp); 730 if_slowtimo(ifp); 731 } 732 733 if (ifp->if_transmit == NULL || ifp->if_transmit == if_nulltransmit) 734 ifp->if_transmit = if_transmit; 735 736 IFNET_LOCK(); 737 TAILQ_INSERT_TAIL(&ifnet_list, ifp, if_list); 738 IFNET_WRITER_INSERT_TAIL(ifp); 739 IFNET_UNLOCK(); 740 } 741 742 /* 743 * The if_percpuq framework 744 * 745 * It allows network device drivers to execute the network stack 746 * in softint (so called softint-based if_input). It utilizes 747 * softint and percpu ifqueue. It doesn't distribute any packets 748 * between CPUs, unlike pktqueue(9). 749 * 750 * Currently we support two options for device drivers to apply the framework: 751 * - Use it implicitly with less changes 752 * - If you use if_attach in driver's _attach function and if_input in 753 * driver's Rx interrupt handler, a packet is queued and a softint handles 754 * the packet implicitly 755 * - Use it explicitly in each driver (recommended) 756 * - You can use if_percpuq_* directly in your driver 757 * - In this case, you need to allocate struct if_percpuq in driver's softc 758 * - See wm(4) as a reference implementation 759 */ 760 761 static void 762 if_percpuq_softint(void *arg) 763 { 764 struct if_percpuq *ipq = arg; 765 struct ifnet *ifp = ipq->ipq_ifp; 766 struct mbuf *m; 767 768 while ((m = if_percpuq_dequeue(ipq)) != NULL) 769 ifp->_if_input(ifp, m); 770 } 771 772 static void 773 if_percpuq_init_ifq(void *p, void *arg __unused, struct cpu_info *ci __unused) 774 { 775 struct ifqueue *const ifq = p; 776 777 memset(ifq, 0, sizeof(*ifq)); 778 ifq->ifq_maxlen = IFQ_MAXLEN; 779 } 780 781 struct if_percpuq * 782 if_percpuq_create(struct ifnet *ifp) 783 { 784 struct if_percpuq *ipq; 785 786 ipq = kmem_zalloc(sizeof(*ipq), KM_SLEEP); 787 if (ipq == NULL) 788 panic("kmem_zalloc failed"); 789 790 ipq->ipq_ifp = ifp; 791 ipq->ipq_si = softint_establish(SOFTINT_NET|SOFTINT_MPSAFE, 792 if_percpuq_softint, ipq); 793 ipq->ipq_ifqs = percpu_alloc(sizeof(struct ifqueue)); 794 percpu_foreach(ipq->ipq_ifqs, &if_percpuq_init_ifq, NULL); 795 796 sysctl_percpuq_setup(&ifp->if_sysctl_log, ifp->if_xname, ipq); 797 798 return ipq; 799 } 800 801 static struct mbuf * 802 if_percpuq_dequeue(struct if_percpuq *ipq) 803 { 804 struct mbuf *m; 805 struct ifqueue *ifq; 806 int s; 807 808 s = splnet(); 809 ifq = percpu_getref(ipq->ipq_ifqs); 810 IF_DEQUEUE(ifq, m); 811 percpu_putref(ipq->ipq_ifqs); 812 splx(s); 813 814 return m; 815 } 816 817 static void 818 if_percpuq_purge_ifq(void *p, void *arg __unused, struct cpu_info *ci __unused) 819 { 820 struct ifqueue *const ifq = p; 821 822 IF_PURGE(ifq); 823 } 824 825 void 826 if_percpuq_destroy(struct if_percpuq *ipq) 827 { 828 829 /* if_detach may already destroy it */ 830 if (ipq == NULL) 831 return; 832 833 softint_disestablish(ipq->ipq_si); 834 percpu_foreach(ipq->ipq_ifqs, &if_percpuq_purge_ifq, NULL); 835 percpu_free(ipq->ipq_ifqs, sizeof(struct ifqueue)); 836 } 837 838 void 839 if_percpuq_enqueue(struct if_percpuq *ipq, struct mbuf *m) 840 { 841 struct ifqueue *ifq; 842 int s; 843 844 KASSERT(ipq != NULL); 845 846 s = splnet(); 847 ifq = percpu_getref(ipq->ipq_ifqs); 848 if (IF_QFULL(ifq)) { 849 IF_DROP(ifq); 850 percpu_putref(ipq->ipq_ifqs); 851 m_freem(m); 852 goto out; 853 } 854 IF_ENQUEUE(ifq, m); 855 percpu_putref(ipq->ipq_ifqs); 856 857 softint_schedule(ipq->ipq_si); 858 out: 859 splx(s); 860 } 861 862 static void 863 if_percpuq_drops(void *p, void *arg, struct cpu_info *ci __unused) 864 { 865 struct ifqueue *const ifq = p; 866 int *sum = arg; 867 868 *sum += ifq->ifq_drops; 869 } 870 871 static int 872 sysctl_percpuq_drops_handler(SYSCTLFN_ARGS) 873 { 874 struct sysctlnode node; 875 struct if_percpuq *ipq; 876 int sum = 0; 877 int error; 878 879 node = *rnode; 880 ipq = node.sysctl_data; 881 882 percpu_foreach(ipq->ipq_ifqs, if_percpuq_drops, &sum); 883 884 node.sysctl_data = ∑ 885 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 886 if (error != 0 || newp == NULL) 887 return error; 888 889 return 0; 890 } 891 892 static void 893 sysctl_percpuq_setup(struct sysctllog **clog, const char* ifname, 894 struct if_percpuq *ipq) 895 { 896 const struct sysctlnode *cnode, *rnode; 897 898 if (sysctl_createv(clog, 0, NULL, &rnode, 899 CTLFLAG_PERMANENT, 900 CTLTYPE_NODE, "interfaces", 901 SYSCTL_DESCR("Per-interface controls"), 902 NULL, 0, NULL, 0, 903 CTL_NET, CTL_CREATE, CTL_EOL) != 0) 904 goto bad; 905 906 if (sysctl_createv(clog, 0, &rnode, &rnode, 907 CTLFLAG_PERMANENT, 908 CTLTYPE_NODE, ifname, 909 SYSCTL_DESCR("Interface controls"), 910 NULL, 0, NULL, 0, 911 CTL_CREATE, CTL_EOL) != 0) 912 goto bad; 913 914 if (sysctl_createv(clog, 0, &rnode, &rnode, 915 CTLFLAG_PERMANENT, 916 CTLTYPE_NODE, "rcvq", 917 SYSCTL_DESCR("Interface input queue controls"), 918 NULL, 0, NULL, 0, 919 CTL_CREATE, CTL_EOL) != 0) 920 goto bad; 921 922 #ifdef NOTYET 923 /* XXX Should show each per-CPU queue length? */ 924 if (sysctl_createv(clog, 0, &rnode, &rnode, 925 CTLFLAG_PERMANENT, 926 CTLTYPE_INT, "len", 927 SYSCTL_DESCR("Current input queue length"), 928 sysctl_percpuq_len, 0, NULL, 0, 929 CTL_CREATE, CTL_EOL) != 0) 930 goto bad; 931 932 if (sysctl_createv(clog, 0, &rnode, &cnode, 933 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 934 CTLTYPE_INT, "maxlen", 935 SYSCTL_DESCR("Maximum allowed input queue length"), 936 sysctl_percpuq_maxlen_handler, 0, (void *)ipq, 0, 937 CTL_CREATE, CTL_EOL) != 0) 938 goto bad; 939 #endif 940 941 if (sysctl_createv(clog, 0, &rnode, &cnode, 942 CTLFLAG_PERMANENT, 943 CTLTYPE_INT, "drops", 944 SYSCTL_DESCR("Total packets dropped due to full input queue"), 945 sysctl_percpuq_drops_handler, 0, (void *)ipq, 0, 946 CTL_CREATE, CTL_EOL) != 0) 947 goto bad; 948 949 return; 950 bad: 951 printf("%s: could not attach sysctl nodes\n", ifname); 952 return; 953 } 954 955 956 /* 957 * The common interface input routine that is called by device drivers, 958 * which should be used only when the driver's rx handler already runs 959 * in softint. 960 */ 961 void 962 if_input(struct ifnet *ifp, struct mbuf *m) 963 { 964 965 KASSERT(ifp->if_percpuq == NULL); 966 KASSERT(!cpu_intr_p()); 967 968 ifp->_if_input(ifp, m); 969 } 970 971 /* 972 * DEPRECATED. Use if_initialize and if_register instead. 973 * See the above comment of if_initialize. 974 * 975 * Note that it implicitly enables if_percpuq to make drivers easy to 976 * migrate softint-based if_input without much changes. If you don't 977 * want to enable it, use if_initialize instead. 978 */ 979 void 980 if_attach(ifnet_t *ifp) 981 { 982 983 if_initialize(ifp); 984 ifp->if_percpuq = if_percpuq_create(ifp); 985 if_register(ifp); 986 } 987 988 void 989 if_attachdomain(void) 990 { 991 struct ifnet *ifp; 992 int s; 993 int bound = curlwp_bind(); 994 995 s = pserialize_read_enter(); 996 IFNET_READER_FOREACH(ifp) { 997 struct psref psref; 998 psref_acquire(&psref, &ifp->if_psref, ifnet_psref_class); 999 pserialize_read_exit(s); 1000 if_attachdomain1(ifp); 1001 s = pserialize_read_enter(); 1002 psref_release(&psref, &ifp->if_psref, ifnet_psref_class); 1003 } 1004 pserialize_read_exit(s); 1005 curlwp_bindx(bound); 1006 } 1007 1008 static void 1009 if_attachdomain1(struct ifnet *ifp) 1010 { 1011 struct domain *dp; 1012 int s; 1013 1014 s = splnet(); 1015 1016 /* address family dependent data region */ 1017 memset(ifp->if_afdata, 0, sizeof(ifp->if_afdata)); 1018 DOMAIN_FOREACH(dp) { 1019 if (dp->dom_ifattach != NULL) 1020 ifp->if_afdata[dp->dom_family] = 1021 (*dp->dom_ifattach)(ifp); 1022 } 1023 1024 splx(s); 1025 } 1026 1027 /* 1028 * Deactivate an interface. This points all of the procedure 1029 * handles at error stubs. May be called from interrupt context. 1030 */ 1031 void 1032 if_deactivate(struct ifnet *ifp) 1033 { 1034 int s; 1035 1036 s = splnet(); 1037 1038 ifp->if_output = if_nulloutput; 1039 ifp->_if_input = if_nullinput; 1040 ifp->if_start = if_nullstart; 1041 ifp->if_transmit = if_nulltransmit; 1042 ifp->if_ioctl = if_nullioctl; 1043 ifp->if_init = if_nullinit; 1044 ifp->if_stop = if_nullstop; 1045 ifp->if_slowtimo = if_nullslowtimo; 1046 ifp->if_drain = if_nulldrain; 1047 1048 /* No more packets may be enqueued. */ 1049 ifp->if_snd.ifq_maxlen = 0; 1050 1051 splx(s); 1052 } 1053 1054 bool 1055 if_is_deactivated(struct ifnet *ifp) 1056 { 1057 1058 return ifp->if_output == if_nulloutput; 1059 } 1060 1061 void 1062 if_purgeaddrs(struct ifnet *ifp, int family, void (*purgeaddr)(struct ifaddr *)) 1063 { 1064 struct ifaddr *ifa, *nifa; 1065 int s; 1066 1067 s = pserialize_read_enter(); 1068 for (ifa = IFADDR_READER_FIRST(ifp); ifa; ifa = nifa) { 1069 nifa = IFADDR_READER_NEXT(ifa); 1070 if (ifa->ifa_addr->sa_family != family) 1071 continue; 1072 pserialize_read_exit(s); 1073 1074 (*purgeaddr)(ifa); 1075 1076 s = pserialize_read_enter(); 1077 } 1078 pserialize_read_exit(s); 1079 } 1080 1081 #ifdef IFAREF_DEBUG 1082 static struct ifaddr **ifa_list; 1083 static int ifa_list_size; 1084 1085 /* Depends on only one if_attach runs at once */ 1086 static void 1087 if_build_ifa_list(struct ifnet *ifp) 1088 { 1089 struct ifaddr *ifa; 1090 int i; 1091 1092 KASSERT(ifa_list == NULL); 1093 KASSERT(ifa_list_size == 0); 1094 1095 IFADDR_READER_FOREACH(ifa, ifp) 1096 ifa_list_size++; 1097 1098 ifa_list = kmem_alloc(sizeof(*ifa) * ifa_list_size, KM_SLEEP); 1099 if (ifa_list == NULL) 1100 return; 1101 1102 i = 0; 1103 IFADDR_READER_FOREACH(ifa, ifp) { 1104 ifa_list[i++] = ifa; 1105 ifaref(ifa); 1106 } 1107 } 1108 1109 static void 1110 if_check_and_free_ifa_list(struct ifnet *ifp) 1111 { 1112 int i; 1113 struct ifaddr *ifa; 1114 1115 if (ifa_list == NULL) 1116 return; 1117 1118 for (i = 0; i < ifa_list_size; i++) { 1119 char buf[64]; 1120 1121 ifa = ifa_list[i]; 1122 sockaddr_format(ifa->ifa_addr, buf, sizeof(buf)); 1123 if (ifa->ifa_refcnt > 1) { 1124 log(LOG_WARNING, 1125 "ifa(%s) still referenced (refcnt=%d)\n", 1126 buf, ifa->ifa_refcnt - 1); 1127 } else 1128 log(LOG_DEBUG, 1129 "ifa(%s) not referenced (refcnt=%d)\n", 1130 buf, ifa->ifa_refcnt - 1); 1131 ifafree(ifa); 1132 } 1133 1134 kmem_free(ifa_list, sizeof(*ifa) * ifa_list_size); 1135 ifa_list = NULL; 1136 ifa_list_size = 0; 1137 } 1138 #endif 1139 1140 /* 1141 * Detach an interface from the list of "active" interfaces, 1142 * freeing any resources as we go along. 1143 * 1144 * NOTE: This routine must be called with a valid thread context, 1145 * as it may block. 1146 */ 1147 void 1148 if_detach(struct ifnet *ifp) 1149 { 1150 struct socket so; 1151 struct ifaddr *ifa; 1152 #ifdef IFAREF_DEBUG 1153 struct ifaddr *last_ifa = NULL; 1154 #endif 1155 struct domain *dp; 1156 const struct protosw *pr; 1157 int s, i, family, purged; 1158 uint64_t xc; 1159 1160 #ifdef IFAREF_DEBUG 1161 if_build_ifa_list(ifp); 1162 #endif 1163 /* 1164 * XXX It's kind of lame that we have to have the 1165 * XXX socket structure... 1166 */ 1167 memset(&so, 0, sizeof(so)); 1168 1169 s = splnet(); 1170 1171 sysctl_teardown(&ifp->if_sysctl_log); 1172 mutex_enter(ifp->if_ioctl_lock); 1173 if_deactivate(ifp); 1174 mutex_exit(ifp->if_ioctl_lock); 1175 1176 IFNET_LOCK(); 1177 ifindex2ifnet[ifp->if_index] = NULL; 1178 TAILQ_REMOVE(&ifnet_list, ifp, if_list); 1179 IFNET_WRITER_REMOVE(ifp); 1180 pserialize_perform(ifnet_psz); 1181 IFNET_UNLOCK(); 1182 1183 /* Wait for all readers to drain before freeing. */ 1184 psref_target_destroy(&ifp->if_psref, ifnet_psref_class); 1185 PSLIST_ENTRY_DESTROY(ifp, if_pslist_entry); 1186 1187 mutex_obj_free(ifp->if_ioctl_lock); 1188 ifp->if_ioctl_lock = NULL; 1189 1190 if (ifp->if_slowtimo != NULL && ifp->if_slowtimo_ch != NULL) { 1191 ifp->if_slowtimo = NULL; 1192 callout_halt(ifp->if_slowtimo_ch, NULL); 1193 callout_destroy(ifp->if_slowtimo_ch); 1194 kmem_free(ifp->if_slowtimo_ch, sizeof(*ifp->if_slowtimo_ch)); 1195 } 1196 1197 /* 1198 * Do an if_down() to give protocols a chance to do something. 1199 */ 1200 if_down(ifp); 1201 1202 #ifdef ALTQ 1203 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 1204 altq_disable(&ifp->if_snd); 1205 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 1206 altq_detach(&ifp->if_snd); 1207 #endif 1208 1209 mutex_obj_free(ifp->if_snd.ifq_lock); 1210 1211 #if NCARP > 0 1212 /* Remove the interface from any carp group it is a part of. */ 1213 if (ifp->if_carp != NULL && ifp->if_type != IFT_CARP) 1214 carp_ifdetach(ifp); 1215 #endif 1216 1217 /* 1218 * Rip all the addresses off the interface. This should make 1219 * all of the routes go away. 1220 * 1221 * pr_usrreq calls can remove an arbitrary number of ifaddrs 1222 * from the list, including our "cursor", ifa. For safety, 1223 * and to honor the TAILQ abstraction, I just restart the 1224 * loop after each removal. Note that the loop will exit 1225 * when all of the remaining ifaddrs belong to the AF_LINK 1226 * family. I am counting on the historical fact that at 1227 * least one pr_usrreq in each address domain removes at 1228 * least one ifaddr. 1229 */ 1230 again: 1231 /* 1232 * At this point, no other one tries to remove ifa in the list, 1233 * so we don't need to take a lock or psref. 1234 */ 1235 IFADDR_READER_FOREACH(ifa, ifp) { 1236 family = ifa->ifa_addr->sa_family; 1237 #ifdef IFAREF_DEBUG 1238 printf("if_detach: ifaddr %p, family %d, refcnt %d\n", 1239 ifa, family, ifa->ifa_refcnt); 1240 if (last_ifa != NULL && ifa == last_ifa) 1241 panic("if_detach: loop detected"); 1242 last_ifa = ifa; 1243 #endif 1244 if (family == AF_LINK) 1245 continue; 1246 dp = pffinddomain(family); 1247 #ifdef DIAGNOSTIC 1248 if (dp == NULL) 1249 panic("if_detach: no domain for AF %d", 1250 family); 1251 #endif 1252 /* 1253 * XXX These PURGEIF calls are redundant with the 1254 * purge-all-families calls below, but are left in for 1255 * now both to make a smaller change, and to avoid 1256 * unplanned interactions with clearing of 1257 * ifp->if_addrlist. 1258 */ 1259 purged = 0; 1260 for (pr = dp->dom_protosw; 1261 pr < dp->dom_protoswNPROTOSW; pr++) { 1262 so.so_proto = pr; 1263 if (pr->pr_usrreqs) { 1264 (void) (*pr->pr_usrreqs->pr_purgeif)(&so, ifp); 1265 purged = 1; 1266 } 1267 } 1268 if (purged == 0) { 1269 /* 1270 * XXX What's really the best thing to do 1271 * XXX here? --thorpej (at) NetBSD.org 1272 */ 1273 printf("if_detach: WARNING: AF %d not purged\n", 1274 family); 1275 ifa_remove(ifp, ifa); 1276 } 1277 goto again; 1278 } 1279 1280 if_free_sadl(ifp); 1281 1282 /* Delete stray routes from the routing table. */ 1283 for (i = 0; i <= AF_MAX; i++) 1284 rt_delete_matched_entries(i, if_delroute_matcher, ifp); 1285 1286 DOMAIN_FOREACH(dp) { 1287 if (dp->dom_ifdetach != NULL && ifp->if_afdata[dp->dom_family]) 1288 { 1289 void *p = ifp->if_afdata[dp->dom_family]; 1290 if (p) { 1291 ifp->if_afdata[dp->dom_family] = NULL; 1292 (*dp->dom_ifdetach)(ifp, p); 1293 } 1294 } 1295 1296 /* 1297 * One would expect multicast memberships (INET and 1298 * INET6) on UDP sockets to be purged by the PURGEIF 1299 * calls above, but if all addresses were removed from 1300 * the interface prior to destruction, the calls will 1301 * not be made (e.g. ppp, for which pppd(8) generally 1302 * removes addresses before destroying the interface). 1303 * Because there is no invariant that multicast 1304 * memberships only exist for interfaces with IPv4 1305 * addresses, we must call PURGEIF regardless of 1306 * addresses. (Protocols which might store ifnet 1307 * pointers are marked with PR_PURGEIF.) 1308 */ 1309 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 1310 so.so_proto = pr; 1311 if (pr->pr_usrreqs && pr->pr_flags & PR_PURGEIF) 1312 (void)(*pr->pr_usrreqs->pr_purgeif)(&so, ifp); 1313 } 1314 } 1315 1316 (void)pfil_run_hooks(if_pfil, 1317 (struct mbuf **)PFIL_IFNET_DETACH, ifp, PFIL_IFNET); 1318 (void)pfil_head_destroy(ifp->if_pfil); 1319 1320 /* Announce that the interface is gone. */ 1321 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 1322 1323 IF_AFDATA_LOCK_DESTROY(ifp); 1324 1325 if (if_is_link_state_changeable(ifp)) { 1326 softint_disestablish(ifp->if_link_si); 1327 ifp->if_link_si = NULL; 1328 } 1329 1330 /* 1331 * remove packets that came from ifp, from software interrupt queues. 1332 */ 1333 DOMAIN_FOREACH(dp) { 1334 for (i = 0; i < __arraycount(dp->dom_ifqueues); i++) { 1335 struct ifqueue *iq = dp->dom_ifqueues[i]; 1336 if (iq == NULL) 1337 break; 1338 dp->dom_ifqueues[i] = NULL; 1339 if_detach_queues(ifp, iq); 1340 } 1341 } 1342 1343 /* 1344 * IP queues have to be processed separately: net-queue barrier 1345 * ensures that the packets are dequeued while a cross-call will 1346 * ensure that the interrupts have completed. FIXME: not quite.. 1347 */ 1348 #ifdef INET 1349 pktq_barrier(ip_pktq); 1350 #endif 1351 #ifdef INET6 1352 if (in6_present) 1353 pktq_barrier(ip6_pktq); 1354 #endif 1355 xc = xc_broadcast(0, (xcfunc_t)nullop, NULL, NULL); 1356 xc_wait(xc); 1357 1358 if (ifp->if_percpuq != NULL) { 1359 if_percpuq_destroy(ifp->if_percpuq); 1360 ifp->if_percpuq = NULL; 1361 } 1362 1363 splx(s); 1364 1365 #ifdef IFAREF_DEBUG 1366 if_check_and_free_ifa_list(ifp); 1367 #endif 1368 } 1369 1370 static void 1371 if_detach_queues(struct ifnet *ifp, struct ifqueue *q) 1372 { 1373 struct mbuf *m, *prev, *next; 1374 1375 prev = NULL; 1376 for (m = q->ifq_head; m != NULL; m = next) { 1377 KASSERT((m->m_flags & M_PKTHDR) != 0); 1378 1379 next = m->m_nextpkt; 1380 if (m->m_pkthdr.rcvif_index != ifp->if_index) { 1381 prev = m; 1382 continue; 1383 } 1384 1385 if (prev != NULL) 1386 prev->m_nextpkt = m->m_nextpkt; 1387 else 1388 q->ifq_head = m->m_nextpkt; 1389 if (q->ifq_tail == m) 1390 q->ifq_tail = prev; 1391 q->ifq_len--; 1392 1393 m->m_nextpkt = NULL; 1394 m_freem(m); 1395 IF_DROP(q); 1396 } 1397 } 1398 1399 /* 1400 * Callback for a radix tree walk to delete all references to an 1401 * ifnet. 1402 */ 1403 static int 1404 if_delroute_matcher(struct rtentry *rt, void *v) 1405 { 1406 struct ifnet *ifp = (struct ifnet *)v; 1407 1408 if (rt->rt_ifp == ifp) 1409 return 1; 1410 else 1411 return 0; 1412 } 1413 1414 /* 1415 * Create a clone network interface. 1416 */ 1417 static int 1418 if_clone_create(const char *name) 1419 { 1420 struct if_clone *ifc; 1421 int unit; 1422 struct ifnet *ifp; 1423 struct psref psref; 1424 1425 ifc = if_clone_lookup(name, &unit); 1426 if (ifc == NULL) 1427 return EINVAL; 1428 1429 ifp = if_get(name, &psref); 1430 if (ifp != NULL) { 1431 if_put(ifp, &psref); 1432 return EEXIST; 1433 } 1434 1435 return (*ifc->ifc_create)(ifc, unit); 1436 } 1437 1438 /* 1439 * Destroy a clone network interface. 1440 */ 1441 static int 1442 if_clone_destroy(const char *name) 1443 { 1444 struct if_clone *ifc; 1445 struct ifnet *ifp; 1446 struct psref psref; 1447 1448 ifc = if_clone_lookup(name, NULL); 1449 if (ifc == NULL) 1450 return EINVAL; 1451 1452 if (ifc->ifc_destroy == NULL) 1453 return EOPNOTSUPP; 1454 1455 ifp = if_get(name, &psref); 1456 if (ifp == NULL) 1457 return ENXIO; 1458 1459 /* We have to disable ioctls here */ 1460 mutex_enter(ifp->if_ioctl_lock); 1461 ifp->if_ioctl = if_nullioctl; 1462 mutex_exit(ifp->if_ioctl_lock); 1463 1464 /* 1465 * We cannot call ifc_destroy with holding ifp. 1466 * Releasing ifp here is safe thanks to if_clone_mtx. 1467 */ 1468 if_put(ifp, &psref); 1469 1470 return (*ifc->ifc_destroy)(ifp); 1471 } 1472 1473 /* 1474 * Look up a network interface cloner. 1475 */ 1476 static struct if_clone * 1477 if_clone_lookup(const char *name, int *unitp) 1478 { 1479 struct if_clone *ifc; 1480 const char *cp; 1481 char *dp, ifname[IFNAMSIZ + 3]; 1482 int unit; 1483 1484 strcpy(ifname, "if_"); 1485 /* separate interface name from unit */ 1486 for (dp = ifname + 3, cp = name; cp - name < IFNAMSIZ && 1487 *cp && (*cp < '0' || *cp > '9');) 1488 *dp++ = *cp++; 1489 1490 if (cp == name || cp - name == IFNAMSIZ || !*cp) 1491 return NULL; /* No name or unit number */ 1492 *dp++ = '\0'; 1493 1494 again: 1495 LIST_FOREACH(ifc, &if_cloners, ifc_list) { 1496 if (strcmp(ifname + 3, ifc->ifc_name) == 0) 1497 break; 1498 } 1499 1500 if (ifc == NULL) { 1501 if (*ifname == '\0' || 1502 module_autoload(ifname, MODULE_CLASS_DRIVER)) 1503 return NULL; 1504 *ifname = '\0'; 1505 goto again; 1506 } 1507 1508 unit = 0; 1509 while (cp - name < IFNAMSIZ && *cp) { 1510 if (*cp < '0' || *cp > '9' || unit >= INT_MAX / 10) { 1511 /* Bogus unit number. */ 1512 return NULL; 1513 } 1514 unit = (unit * 10) + (*cp++ - '0'); 1515 } 1516 1517 if (unitp != NULL) 1518 *unitp = unit; 1519 return ifc; 1520 } 1521 1522 /* 1523 * Register a network interface cloner. 1524 */ 1525 void 1526 if_clone_attach(struct if_clone *ifc) 1527 { 1528 1529 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list); 1530 if_cloners_count++; 1531 } 1532 1533 /* 1534 * Unregister a network interface cloner. 1535 */ 1536 void 1537 if_clone_detach(struct if_clone *ifc) 1538 { 1539 1540 LIST_REMOVE(ifc, ifc_list); 1541 if_cloners_count--; 1542 } 1543 1544 /* 1545 * Provide list of interface cloners to userspace. 1546 */ 1547 int 1548 if_clone_list(int buf_count, char *buffer, int *total) 1549 { 1550 char outbuf[IFNAMSIZ], *dst; 1551 struct if_clone *ifc; 1552 int count, error = 0; 1553 1554 *total = if_cloners_count; 1555 if ((dst = buffer) == NULL) { 1556 /* Just asking how many there are. */ 1557 return 0; 1558 } 1559 1560 if (buf_count < 0) 1561 return EINVAL; 1562 1563 count = (if_cloners_count < buf_count) ? 1564 if_cloners_count : buf_count; 1565 1566 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0; 1567 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) { 1568 (void)strncpy(outbuf, ifc->ifc_name, sizeof(outbuf)); 1569 if (outbuf[sizeof(outbuf) - 1] != '\0') 1570 return ENAMETOOLONG; 1571 error = copyout(outbuf, dst, sizeof(outbuf)); 1572 if (error != 0) 1573 break; 1574 } 1575 1576 return error; 1577 } 1578 1579 void 1580 ifa_psref_init(struct ifaddr *ifa) 1581 { 1582 1583 psref_target_init(&ifa->ifa_psref, ifa_psref_class); 1584 } 1585 1586 void 1587 ifaref(struct ifaddr *ifa) 1588 { 1589 ifa->ifa_refcnt++; 1590 } 1591 1592 void 1593 ifafree(struct ifaddr *ifa) 1594 { 1595 KASSERT(ifa != NULL); 1596 KASSERT(ifa->ifa_refcnt > 0); 1597 1598 if (--ifa->ifa_refcnt == 0) { 1599 free(ifa, M_IFADDR); 1600 } 1601 } 1602 1603 void 1604 ifa_insert(struct ifnet *ifp, struct ifaddr *ifa) 1605 { 1606 1607 ifa->ifa_ifp = ifp; 1608 1609 IFNET_LOCK(); 1610 TAILQ_INSERT_TAIL(&ifp->if_addrlist, ifa, ifa_list); 1611 IFADDR_ENTRY_INIT(ifa); 1612 IFADDR_WRITER_INSERT_TAIL(ifp, ifa); 1613 IFNET_UNLOCK(); 1614 1615 ifaref(ifa); 1616 } 1617 1618 void 1619 ifa_remove(struct ifnet *ifp, struct ifaddr *ifa) 1620 { 1621 1622 KASSERT(ifa->ifa_ifp == ifp); 1623 1624 IFNET_LOCK(); 1625 TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list); 1626 IFADDR_WRITER_REMOVE(ifa); 1627 #ifdef NET_MPSAFE 1628 pserialize_perform(ifnet_psz); 1629 #endif 1630 IFNET_UNLOCK(); 1631 1632 #ifdef NET_MPSAFE 1633 psref_target_destroy(&ifa->ifa_psref, ifa_psref_class); 1634 #endif 1635 IFADDR_ENTRY_DESTROY(ifa); 1636 ifafree(ifa); 1637 } 1638 1639 void 1640 ifa_acquire(struct ifaddr *ifa, struct psref *psref) 1641 { 1642 1643 psref_acquire(psref, &ifa->ifa_psref, ifa_psref_class); 1644 } 1645 1646 void 1647 ifa_release(struct ifaddr *ifa, struct psref *psref) 1648 { 1649 1650 if (ifa == NULL) 1651 return; 1652 1653 psref_release(psref, &ifa->ifa_psref, ifa_psref_class); 1654 } 1655 1656 bool 1657 ifa_held(struct ifaddr *ifa) 1658 { 1659 1660 return psref_held(&ifa->ifa_psref, ifa_psref_class); 1661 } 1662 1663 static inline int 1664 equal(const struct sockaddr *sa1, const struct sockaddr *sa2) 1665 { 1666 return sockaddr_cmp(sa1, sa2) == 0; 1667 } 1668 1669 /* 1670 * Locate an interface based on a complete address. 1671 */ 1672 /*ARGSUSED*/ 1673 struct ifaddr * 1674 ifa_ifwithaddr(const struct sockaddr *addr) 1675 { 1676 struct ifnet *ifp; 1677 struct ifaddr *ifa; 1678 1679 IFNET_READER_FOREACH(ifp) { 1680 if (if_is_deactivated(ifp)) 1681 continue; 1682 IFADDR_READER_FOREACH(ifa, ifp) { 1683 if (ifa->ifa_addr->sa_family != addr->sa_family) 1684 continue; 1685 if (equal(addr, ifa->ifa_addr)) 1686 return ifa; 1687 if ((ifp->if_flags & IFF_BROADCAST) && 1688 ifa->ifa_broadaddr && 1689 /* IP6 doesn't have broadcast */ 1690 ifa->ifa_broadaddr->sa_len != 0 && 1691 equal(ifa->ifa_broadaddr, addr)) 1692 return ifa; 1693 } 1694 } 1695 return NULL; 1696 } 1697 1698 struct ifaddr * 1699 ifa_ifwithaddr_psref(const struct sockaddr *addr, struct psref *psref) 1700 { 1701 struct ifaddr *ifa; 1702 int s = pserialize_read_enter(); 1703 1704 ifa = ifa_ifwithaddr(addr); 1705 if (ifa != NULL) 1706 ifa_acquire(ifa, psref); 1707 pserialize_read_exit(s); 1708 1709 return ifa; 1710 } 1711 1712 /* 1713 * Locate the point to point interface with a given destination address. 1714 */ 1715 /*ARGSUSED*/ 1716 struct ifaddr * 1717 ifa_ifwithdstaddr(const struct sockaddr *addr) 1718 { 1719 struct ifnet *ifp; 1720 struct ifaddr *ifa; 1721 1722 IFNET_READER_FOREACH(ifp) { 1723 if (if_is_deactivated(ifp)) 1724 continue; 1725 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1726 continue; 1727 IFADDR_READER_FOREACH(ifa, ifp) { 1728 if (ifa->ifa_addr->sa_family != addr->sa_family || 1729 ifa->ifa_dstaddr == NULL) 1730 continue; 1731 if (equal(addr, ifa->ifa_dstaddr)) 1732 return ifa; 1733 } 1734 } 1735 1736 return NULL; 1737 } 1738 1739 struct ifaddr * 1740 ifa_ifwithdstaddr_psref(const struct sockaddr *addr, struct psref *psref) 1741 { 1742 struct ifaddr *ifa; 1743 int s; 1744 1745 s = pserialize_read_enter(); 1746 ifa = ifa_ifwithdstaddr(addr); 1747 if (ifa != NULL) 1748 ifa_acquire(ifa, psref); 1749 pserialize_read_exit(s); 1750 1751 return ifa; 1752 } 1753 1754 /* 1755 * Find an interface on a specific network. If many, choice 1756 * is most specific found. 1757 */ 1758 struct ifaddr * 1759 ifa_ifwithnet(const struct sockaddr *addr) 1760 { 1761 struct ifnet *ifp; 1762 struct ifaddr *ifa, *ifa_maybe = NULL; 1763 const struct sockaddr_dl *sdl; 1764 u_int af = addr->sa_family; 1765 const char *addr_data = addr->sa_data, *cplim; 1766 1767 if (af == AF_LINK) { 1768 sdl = satocsdl(addr); 1769 if (sdl->sdl_index && sdl->sdl_index < if_indexlim && 1770 ifindex2ifnet[sdl->sdl_index] && 1771 !if_is_deactivated(ifindex2ifnet[sdl->sdl_index])) { 1772 return ifindex2ifnet[sdl->sdl_index]->if_dl; 1773 } 1774 } 1775 #ifdef NETATALK 1776 if (af == AF_APPLETALK) { 1777 const struct sockaddr_at *sat, *sat2; 1778 sat = (const struct sockaddr_at *)addr; 1779 IFNET_READER_FOREACH(ifp) { 1780 if (if_is_deactivated(ifp)) 1781 continue; 1782 ifa = at_ifawithnet((const struct sockaddr_at *)addr, ifp); 1783 if (ifa == NULL) 1784 continue; 1785 sat2 = (struct sockaddr_at *)ifa->ifa_addr; 1786 if (sat2->sat_addr.s_net == sat->sat_addr.s_net) 1787 return ifa; /* exact match */ 1788 if (ifa_maybe == NULL) { 1789 /* else keep the if with the right range */ 1790 ifa_maybe = ifa; 1791 } 1792 } 1793 return ifa_maybe; 1794 } 1795 #endif 1796 IFNET_READER_FOREACH(ifp) { 1797 if (if_is_deactivated(ifp)) 1798 continue; 1799 IFADDR_READER_FOREACH(ifa, ifp) { 1800 const char *cp, *cp2, *cp3; 1801 1802 if (ifa->ifa_addr->sa_family != af || 1803 ifa->ifa_netmask == NULL) 1804 next: continue; 1805 cp = addr_data; 1806 cp2 = ifa->ifa_addr->sa_data; 1807 cp3 = ifa->ifa_netmask->sa_data; 1808 cplim = (const char *)ifa->ifa_netmask + 1809 ifa->ifa_netmask->sa_len; 1810 while (cp3 < cplim) { 1811 if ((*cp++ ^ *cp2++) & *cp3++) { 1812 /* want to continue for() loop */ 1813 goto next; 1814 } 1815 } 1816 if (ifa_maybe == NULL || 1817 rt_refines(ifa->ifa_netmask, 1818 ifa_maybe->ifa_netmask)) 1819 ifa_maybe = ifa; 1820 } 1821 } 1822 return ifa_maybe; 1823 } 1824 1825 struct ifaddr * 1826 ifa_ifwithnet_psref(const struct sockaddr *addr, struct psref *psref) 1827 { 1828 struct ifaddr *ifa; 1829 int s; 1830 1831 s = pserialize_read_enter(); 1832 ifa = ifa_ifwithnet(addr); 1833 if (ifa != NULL) 1834 ifa_acquire(ifa, psref); 1835 pserialize_read_exit(s); 1836 1837 return ifa; 1838 } 1839 1840 /* 1841 * Find the interface of the addresss. 1842 */ 1843 struct ifaddr * 1844 ifa_ifwithladdr(const struct sockaddr *addr) 1845 { 1846 struct ifaddr *ia; 1847 1848 if ((ia = ifa_ifwithaddr(addr)) || (ia = ifa_ifwithdstaddr(addr)) || 1849 (ia = ifa_ifwithnet(addr))) 1850 return ia; 1851 return NULL; 1852 } 1853 1854 struct ifaddr * 1855 ifa_ifwithladdr_psref(const struct sockaddr *addr, struct psref *psref) 1856 { 1857 struct ifaddr *ifa; 1858 int s; 1859 1860 s = pserialize_read_enter(); 1861 ifa = ifa_ifwithladdr(addr); 1862 if (ifa != NULL) 1863 ifa_acquire(ifa, psref); 1864 pserialize_read_exit(s); 1865 1866 return ifa; 1867 } 1868 1869 /* 1870 * Find an interface using a specific address family 1871 */ 1872 struct ifaddr * 1873 ifa_ifwithaf(int af) 1874 { 1875 struct ifnet *ifp; 1876 struct ifaddr *ifa = NULL; 1877 int s; 1878 1879 s = pserialize_read_enter(); 1880 IFNET_READER_FOREACH(ifp) { 1881 if (if_is_deactivated(ifp)) 1882 continue; 1883 IFADDR_READER_FOREACH(ifa, ifp) { 1884 if (ifa->ifa_addr->sa_family == af) 1885 goto out; 1886 } 1887 } 1888 out: 1889 pserialize_read_exit(s); 1890 return ifa; 1891 } 1892 1893 /* 1894 * Find an interface address specific to an interface best matching 1895 * a given address. 1896 */ 1897 struct ifaddr * 1898 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp) 1899 { 1900 struct ifaddr *ifa; 1901 const char *cp, *cp2, *cp3; 1902 const char *cplim; 1903 struct ifaddr *ifa_maybe = 0; 1904 u_int af = addr->sa_family; 1905 1906 if (if_is_deactivated(ifp)) 1907 return NULL; 1908 1909 if (af >= AF_MAX) 1910 return NULL; 1911 1912 IFADDR_READER_FOREACH(ifa, ifp) { 1913 if (ifa->ifa_addr->sa_family != af) 1914 continue; 1915 ifa_maybe = ifa; 1916 if (ifa->ifa_netmask == NULL) { 1917 if (equal(addr, ifa->ifa_addr) || 1918 (ifa->ifa_dstaddr && 1919 equal(addr, ifa->ifa_dstaddr))) 1920 return ifa; 1921 continue; 1922 } 1923 cp = addr->sa_data; 1924 cp2 = ifa->ifa_addr->sa_data; 1925 cp3 = ifa->ifa_netmask->sa_data; 1926 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1927 for (; cp3 < cplim; cp3++) { 1928 if ((*cp++ ^ *cp2++) & *cp3) 1929 break; 1930 } 1931 if (cp3 == cplim) 1932 return ifa; 1933 } 1934 return ifa_maybe; 1935 } 1936 1937 struct ifaddr * 1938 ifaof_ifpforaddr_psref(const struct sockaddr *addr, struct ifnet *ifp, 1939 struct psref *psref) 1940 { 1941 struct ifaddr *ifa; 1942 int s; 1943 1944 s = pserialize_read_enter(); 1945 ifa = ifaof_ifpforaddr(addr, ifp); 1946 if (ifa != NULL) 1947 ifa_acquire(ifa, psref); 1948 pserialize_read_exit(s); 1949 1950 return ifa; 1951 } 1952 1953 /* 1954 * Default action when installing a route with a Link Level gateway. 1955 * Lookup an appropriate real ifa to point to. 1956 * This should be moved to /sys/net/link.c eventually. 1957 */ 1958 void 1959 link_rtrequest(int cmd, struct rtentry *rt, const struct rt_addrinfo *info) 1960 { 1961 struct ifaddr *ifa; 1962 const struct sockaddr *dst; 1963 struct ifnet *ifp; 1964 struct psref psref; 1965 1966 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL || 1967 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_getkey(rt)) == NULL) 1968 return; 1969 if ((ifa = ifaof_ifpforaddr_psref(dst, ifp, &psref)) != NULL) { 1970 rt_replace_ifa(rt, ifa); 1971 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1972 ifa->ifa_rtrequest(cmd, rt, info); 1973 ifa_release(ifa, &psref); 1974 } 1975 } 1976 1977 /* 1978 * bitmask macros to manage a densely packed link_state change queue. 1979 * Because we need to store LINK_STATE_UNKNOWN(0), LINK_STATE_DOWN(1) and 1980 * LINK_STATE_UP(2) we need 2 bits for each state change. 1981 * As a state change to store is 0, treat all bits set as an unset item. 1982 */ 1983 #define LQ_ITEM_BITS 2 1984 #define LQ_ITEM_MASK ((1 << LQ_ITEM_BITS) - 1) 1985 #define LQ_MASK(i) (LQ_ITEM_MASK << (i) * LQ_ITEM_BITS) 1986 #define LINK_STATE_UNSET LQ_ITEM_MASK 1987 #define LQ_ITEM(q, i) (((q) & LQ_MASK((i))) >> (i) * LQ_ITEM_BITS) 1988 #define LQ_STORE(q, i, v) \ 1989 do { \ 1990 (q) &= ~LQ_MASK((i)); \ 1991 (q) |= (v) << (i) * LQ_ITEM_BITS; \ 1992 } while (0 /* CONSTCOND */) 1993 #define LQ_MAX(q) ((sizeof((q)) * NBBY) / LQ_ITEM_BITS) 1994 #define LQ_POP(q, v) \ 1995 do { \ 1996 (v) = LQ_ITEM((q), 0); \ 1997 (q) >>= LQ_ITEM_BITS; \ 1998 (q) |= LINK_STATE_UNSET << (LQ_MAX((q)) - 1) * LQ_ITEM_BITS; \ 1999 } while (0 /* CONSTCOND */) 2000 #define LQ_PUSH(q, v) \ 2001 do { \ 2002 (q) >>= LQ_ITEM_BITS; \ 2003 (q) |= (v) << (LQ_MAX((q)) - 1) * LQ_ITEM_BITS; \ 2004 } while (0 /* CONSTCOND */) 2005 #define LQ_FIND_UNSET(q, i) \ 2006 for ((i) = 0; i < LQ_MAX((q)); (i)++) { \ 2007 if (LQ_ITEM((q), (i)) == LINK_STATE_UNSET) \ 2008 break; \ 2009 } 2010 /* 2011 * Handle a change in the interface link state and 2012 * queue notifications. 2013 */ 2014 void 2015 if_link_state_change(struct ifnet *ifp, int link_state) 2016 { 2017 int s, idx; 2018 2019 KASSERTMSG(if_is_link_state_changeable(ifp), 2020 "%s: IFEF_NO_LINK_STATE_CHANGE must not be set, but if_extflags=0x%x", 2021 ifp->if_xname, ifp->if_extflags); 2022 2023 /* Ensure change is to a valid state */ 2024 switch (link_state) { 2025 case LINK_STATE_UNKNOWN: /* FALLTHROUGH */ 2026 case LINK_STATE_DOWN: /* FALLTHROUGH */ 2027 case LINK_STATE_UP: 2028 break; 2029 default: 2030 #ifdef DEBUG 2031 printf("%s: invalid link state %d\n", 2032 ifp->if_xname, link_state); 2033 #endif 2034 return; 2035 } 2036 2037 s = splnet(); 2038 2039 /* Find the last unset event in the queue. */ 2040 LQ_FIND_UNSET(ifp->if_link_queue, idx); 2041 2042 /* 2043 * Ensure link_state doesn't match the last event in the queue. 2044 * ifp->if_link_state is not checked and set here because 2045 * that would present an inconsistent picture to the system. 2046 */ 2047 if (idx != 0 && 2048 LQ_ITEM(ifp->if_link_queue, idx - 1) == (uint8_t)link_state) 2049 goto out; 2050 2051 /* Handle queue overflow. */ 2052 if (idx == LQ_MAX(ifp->if_link_queue)) { 2053 uint8_t lost; 2054 2055 /* 2056 * The DOWN state must be protected from being pushed off 2057 * the queue to ensure that userland will always be 2058 * in a sane state. 2059 * Because DOWN is protected, there is no need to protect 2060 * UNKNOWN. 2061 * It should be invalid to change from any other state to 2062 * UNKNOWN anyway ... 2063 */ 2064 lost = LQ_ITEM(ifp->if_link_queue, 0); 2065 LQ_PUSH(ifp->if_link_queue, (uint8_t)link_state); 2066 if (lost == LINK_STATE_DOWN) { 2067 lost = LQ_ITEM(ifp->if_link_queue, 0); 2068 LQ_STORE(ifp->if_link_queue, 0, LINK_STATE_DOWN); 2069 } 2070 printf("%s: lost link state change %s\n", 2071 ifp->if_xname, 2072 lost == LINK_STATE_UP ? "UP" : 2073 lost == LINK_STATE_DOWN ? "DOWN" : 2074 "UNKNOWN"); 2075 } else 2076 LQ_STORE(ifp->if_link_queue, idx, (uint8_t)link_state); 2077 2078 softint_schedule(ifp->if_link_si); 2079 2080 out: 2081 splx(s); 2082 } 2083 2084 /* 2085 * Handle interface link state change notifications. 2086 * Must be called at splnet(). 2087 */ 2088 static void 2089 if_link_state_change0(struct ifnet *ifp, int link_state) 2090 { 2091 struct domain *dp; 2092 2093 /* Ensure the change is still valid. */ 2094 if (ifp->if_link_state == link_state) 2095 return; 2096 2097 #ifdef DEBUG 2098 log(LOG_DEBUG, "%s: link state %s (was %s)\n", ifp->if_xname, 2099 link_state == LINK_STATE_UP ? "UP" : 2100 link_state == LINK_STATE_DOWN ? "DOWN" : 2101 "UNKNOWN", 2102 ifp->if_link_state == LINK_STATE_UP ? "UP" : 2103 ifp->if_link_state == LINK_STATE_DOWN ? "DOWN" : 2104 "UNKNOWN"); 2105 #endif 2106 2107 /* 2108 * When going from UNKNOWN to UP, we need to mark existing 2109 * addresses as tentative and restart DAD as we may have 2110 * erroneously not found a duplicate. 2111 * 2112 * This needs to happen before rt_ifmsg to avoid a race where 2113 * listeners would have an address and expect it to work right 2114 * away. 2115 */ 2116 if (link_state == LINK_STATE_UP && 2117 ifp->if_link_state == LINK_STATE_UNKNOWN) 2118 { 2119 DOMAIN_FOREACH(dp) { 2120 if (dp->dom_if_link_state_change != NULL) 2121 dp->dom_if_link_state_change(ifp, 2122 LINK_STATE_DOWN); 2123 } 2124 } 2125 2126 ifp->if_link_state = link_state; 2127 2128 /* Notify that the link state has changed. */ 2129 rt_ifmsg(ifp); 2130 2131 #if NCARP > 0 2132 if (ifp->if_carp) 2133 carp_carpdev_state(ifp); 2134 #endif 2135 2136 DOMAIN_FOREACH(dp) { 2137 if (dp->dom_if_link_state_change != NULL) 2138 dp->dom_if_link_state_change(ifp, link_state); 2139 } 2140 } 2141 2142 /* 2143 * Process the interface link state change queue. 2144 */ 2145 static void 2146 if_link_state_change_si(void *arg) 2147 { 2148 struct ifnet *ifp = arg; 2149 int s; 2150 uint8_t state; 2151 2152 s = splnet(); 2153 2154 /* Pop a link state change from the queue and process it. */ 2155 LQ_POP(ifp->if_link_queue, state); 2156 if_link_state_change0(ifp, state); 2157 2158 /* If there is a link state change to come, schedule it. */ 2159 if (LQ_ITEM(ifp->if_link_queue, 0) != LINK_STATE_UNSET) 2160 softint_schedule(ifp->if_link_si); 2161 2162 splx(s); 2163 } 2164 2165 /* 2166 * Default action when installing a local route on a point-to-point 2167 * interface. 2168 */ 2169 void 2170 p2p_rtrequest(int req, struct rtentry *rt, 2171 __unused const struct rt_addrinfo *info) 2172 { 2173 struct ifnet *ifp = rt->rt_ifp; 2174 struct ifaddr *ifa, *lo0ifa; 2175 int s = pserialize_read_enter(); 2176 2177 switch (req) { 2178 case RTM_ADD: 2179 if ((rt->rt_flags & RTF_LOCAL) == 0) 2180 break; 2181 2182 rt->rt_ifp = lo0ifp; 2183 2184 IFADDR_READER_FOREACH(ifa, ifp) { 2185 if (equal(rt_getkey(rt), ifa->ifa_addr)) 2186 break; 2187 } 2188 if (ifa == NULL) 2189 break; 2190 2191 /* 2192 * Ensure lo0 has an address of the same family. 2193 */ 2194 IFADDR_READER_FOREACH(lo0ifa, lo0ifp) { 2195 if (lo0ifa->ifa_addr->sa_family == 2196 ifa->ifa_addr->sa_family) 2197 break; 2198 } 2199 if (lo0ifa == NULL) 2200 break; 2201 2202 /* 2203 * Make sure to set rt->rt_ifa to the interface 2204 * address we are using, otherwise we will have trouble 2205 * with source address selection. 2206 */ 2207 if (ifa != rt->rt_ifa) 2208 rt_replace_ifa(rt, ifa); 2209 break; 2210 case RTM_DELETE: 2211 default: 2212 break; 2213 } 2214 pserialize_read_exit(s); 2215 } 2216 2217 /* 2218 * Mark an interface down and notify protocols of 2219 * the transition. 2220 * NOTE: must be called at splsoftnet or equivalent. 2221 */ 2222 void 2223 if_down(struct ifnet *ifp) 2224 { 2225 struct ifaddr *ifa; 2226 struct domain *dp; 2227 int s, bound; 2228 struct psref psref; 2229 2230 ifp->if_flags &= ~IFF_UP; 2231 nanotime(&ifp->if_lastchange); 2232 2233 bound = curlwp_bind(); 2234 s = pserialize_read_enter(); 2235 IFADDR_READER_FOREACH(ifa, ifp) { 2236 ifa_acquire(ifa, &psref); 2237 pserialize_read_exit(s); 2238 2239 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 2240 2241 s = pserialize_read_enter(); 2242 ifa_release(ifa, &psref); 2243 } 2244 pserialize_read_exit(s); 2245 curlwp_bindx(bound); 2246 2247 IFQ_PURGE(&ifp->if_snd); 2248 #if NCARP > 0 2249 if (ifp->if_carp) 2250 carp_carpdev_state(ifp); 2251 #endif 2252 rt_ifmsg(ifp); 2253 DOMAIN_FOREACH(dp) { 2254 if (dp->dom_if_down) 2255 dp->dom_if_down(ifp); 2256 } 2257 } 2258 2259 /* 2260 * Mark an interface up and notify protocols of 2261 * the transition. 2262 * NOTE: must be called at splsoftnet or equivalent. 2263 */ 2264 void 2265 if_up(struct ifnet *ifp) 2266 { 2267 #ifdef notyet 2268 struct ifaddr *ifa; 2269 #endif 2270 struct domain *dp; 2271 2272 ifp->if_flags |= IFF_UP; 2273 nanotime(&ifp->if_lastchange); 2274 #ifdef notyet 2275 /* this has no effect on IP, and will kill all ISO connections XXX */ 2276 IFADDR_READER_FOREACH(ifa, ifp) 2277 pfctlinput(PRC_IFUP, ifa->ifa_addr); 2278 #endif 2279 #if NCARP > 0 2280 if (ifp->if_carp) 2281 carp_carpdev_state(ifp); 2282 #endif 2283 rt_ifmsg(ifp); 2284 DOMAIN_FOREACH(dp) { 2285 if (dp->dom_if_up) 2286 dp->dom_if_up(ifp); 2287 } 2288 } 2289 2290 /* 2291 * Handle interface slowtimo timer routine. Called 2292 * from softclock, we decrement timer (if set) and 2293 * call the appropriate interface routine on expiration. 2294 */ 2295 static void 2296 if_slowtimo(void *arg) 2297 { 2298 void (*slowtimo)(struct ifnet *); 2299 struct ifnet *ifp = arg; 2300 int s; 2301 2302 slowtimo = ifp->if_slowtimo; 2303 if (__predict_false(slowtimo == NULL)) 2304 return; 2305 2306 s = splnet(); 2307 if (ifp->if_timer != 0 && --ifp->if_timer == 0) 2308 (*slowtimo)(ifp); 2309 2310 splx(s); 2311 2312 if (__predict_true(ifp->if_slowtimo != NULL)) 2313 callout_schedule(ifp->if_slowtimo_ch, hz / IFNET_SLOWHZ); 2314 } 2315 2316 /* 2317 * Set/clear promiscuous mode on interface ifp based on the truth value 2318 * of pswitch. The calls are reference counted so that only the first 2319 * "on" request actually has an effect, as does the final "off" request. 2320 * Results are undefined if the "off" and "on" requests are not matched. 2321 */ 2322 int 2323 ifpromisc(struct ifnet *ifp, int pswitch) 2324 { 2325 int pcount, ret; 2326 short nflags; 2327 2328 pcount = ifp->if_pcount; 2329 if (pswitch) { 2330 /* 2331 * Allow the device to be "placed" into promiscuous 2332 * mode even if it is not configured up. It will 2333 * consult IFF_PROMISC when it is brought up. 2334 */ 2335 if (ifp->if_pcount++ != 0) 2336 return 0; 2337 nflags = ifp->if_flags | IFF_PROMISC; 2338 } else { 2339 if (--ifp->if_pcount > 0) 2340 return 0; 2341 nflags = ifp->if_flags & ~IFF_PROMISC; 2342 } 2343 ret = if_flags_set(ifp, nflags); 2344 /* Restore interface state if not successful. */ 2345 if (ret != 0) { 2346 ifp->if_pcount = pcount; 2347 } 2348 return ret; 2349 } 2350 2351 /* 2352 * Map interface name to 2353 * interface structure pointer. 2354 */ 2355 struct ifnet * 2356 ifunit(const char *name) 2357 { 2358 struct ifnet *ifp; 2359 const char *cp = name; 2360 u_int unit = 0; 2361 u_int i; 2362 int s; 2363 2364 /* 2365 * If the entire name is a number, treat it as an ifindex. 2366 */ 2367 for (i = 0; i < IFNAMSIZ && *cp >= '0' && *cp <= '9'; i++, cp++) { 2368 unit = unit * 10 + (*cp - '0'); 2369 } 2370 2371 /* 2372 * If the number took all of the name, then it's a valid ifindex. 2373 */ 2374 if (i == IFNAMSIZ || (cp != name && *cp == '\0')) { 2375 if (unit >= if_indexlim) 2376 return NULL; 2377 ifp = ifindex2ifnet[unit]; 2378 if (ifp == NULL || if_is_deactivated(ifp)) 2379 return NULL; 2380 return ifp; 2381 } 2382 2383 ifp = NULL; 2384 s = pserialize_read_enter(); 2385 IFNET_READER_FOREACH(ifp) { 2386 if (if_is_deactivated(ifp)) 2387 continue; 2388 if (strcmp(ifp->if_xname, name) == 0) 2389 goto out; 2390 } 2391 out: 2392 pserialize_read_exit(s); 2393 return ifp; 2394 } 2395 2396 /* 2397 * Get a reference of an ifnet object by an interface name. 2398 * The returned reference is protected by psref(9). The caller 2399 * must release a returned reference by if_put after use. 2400 */ 2401 struct ifnet * 2402 if_get(const char *name, struct psref *psref) 2403 { 2404 struct ifnet *ifp; 2405 const char *cp = name; 2406 u_int unit = 0; 2407 u_int i; 2408 int s; 2409 2410 /* 2411 * If the entire name is a number, treat it as an ifindex. 2412 */ 2413 for (i = 0; i < IFNAMSIZ && *cp >= '0' && *cp <= '9'; i++, cp++) { 2414 unit = unit * 10 + (*cp - '0'); 2415 } 2416 2417 /* 2418 * If the number took all of the name, then it's a valid ifindex. 2419 */ 2420 if (i == IFNAMSIZ || (cp != name && *cp == '\0')) { 2421 if (unit >= if_indexlim) 2422 return NULL; 2423 ifp = ifindex2ifnet[unit]; 2424 if (ifp == NULL || if_is_deactivated(ifp)) 2425 return NULL; 2426 return ifp; 2427 } 2428 2429 ifp = NULL; 2430 s = pserialize_read_enter(); 2431 IFNET_READER_FOREACH(ifp) { 2432 if (if_is_deactivated(ifp)) 2433 continue; 2434 if (strcmp(ifp->if_xname, name) == 0) { 2435 psref_acquire(psref, &ifp->if_psref, 2436 ifnet_psref_class); 2437 goto out; 2438 } 2439 } 2440 out: 2441 pserialize_read_exit(s); 2442 return ifp; 2443 } 2444 2445 /* 2446 * Release a reference of an ifnet object given by if_get or 2447 * if_get_byindex. 2448 */ 2449 void 2450 if_put(const struct ifnet *ifp, struct psref *psref) 2451 { 2452 2453 if (ifp == NULL) 2454 return; 2455 2456 psref_release(psref, &ifp->if_psref, ifnet_psref_class); 2457 } 2458 2459 ifnet_t * 2460 if_byindex(u_int idx) 2461 { 2462 ifnet_t *ifp; 2463 2464 ifp = (idx < if_indexlim) ? ifindex2ifnet[idx] : NULL; 2465 if (ifp != NULL && if_is_deactivated(ifp)) 2466 ifp = NULL; 2467 return ifp; 2468 } 2469 2470 /* 2471 * Get a reference of an ifnet object by an interface index. 2472 * The returned reference is protected by psref(9). The caller 2473 * must release a returned reference by if_put after use. 2474 */ 2475 ifnet_t * 2476 if_get_byindex(u_int idx, struct psref *psref) 2477 { 2478 ifnet_t *ifp; 2479 int s; 2480 2481 s = pserialize_read_enter(); 2482 ifp = (__predict_true(idx < if_indexlim)) ? ifindex2ifnet[idx] : NULL; 2483 if (ifp != NULL && if_is_deactivated(ifp)) 2484 ifp = NULL; 2485 if (__predict_true(ifp != NULL)) 2486 psref_acquire(psref, &ifp->if_psref, ifnet_psref_class); 2487 pserialize_read_exit(s); 2488 2489 return ifp; 2490 } 2491 2492 /* 2493 * XXX it's safe only if the passed ifp is guaranteed to not be freed, 2494 * for example the ifp is already held or some other object is held which 2495 * guarantes the ifp to not be freed indirectly. 2496 */ 2497 void 2498 if_acquire_NOMPSAFE(struct ifnet *ifp, struct psref *psref) 2499 { 2500 2501 KASSERT(ifp->if_index != 0); 2502 psref_acquire(psref, &ifp->if_psref, ifnet_psref_class); 2503 } 2504 2505 bool 2506 if_held(struct ifnet *ifp) 2507 { 2508 2509 return psref_held(&ifp->if_psref, ifnet_psref_class); 2510 } 2511 2512 2513 /* common */ 2514 int 2515 ifioctl_common(struct ifnet *ifp, u_long cmd, void *data) 2516 { 2517 int s; 2518 struct ifreq *ifr; 2519 struct ifcapreq *ifcr; 2520 struct ifdatareq *ifdr; 2521 2522 switch (cmd) { 2523 case SIOCSIFCAP: 2524 ifcr = data; 2525 if ((ifcr->ifcr_capenable & ~ifp->if_capabilities) != 0) 2526 return EINVAL; 2527 2528 if (ifcr->ifcr_capenable == ifp->if_capenable) 2529 return 0; 2530 2531 ifp->if_capenable = ifcr->ifcr_capenable; 2532 2533 /* Pre-compute the checksum flags mask. */ 2534 ifp->if_csum_flags_tx = 0; 2535 ifp->if_csum_flags_rx = 0; 2536 if (ifp->if_capenable & IFCAP_CSUM_IPv4_Tx) { 2537 ifp->if_csum_flags_tx |= M_CSUM_IPv4; 2538 } 2539 if (ifp->if_capenable & IFCAP_CSUM_IPv4_Rx) { 2540 ifp->if_csum_flags_rx |= M_CSUM_IPv4; 2541 } 2542 2543 if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Tx) { 2544 ifp->if_csum_flags_tx |= M_CSUM_TCPv4; 2545 } 2546 if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Rx) { 2547 ifp->if_csum_flags_rx |= M_CSUM_TCPv4; 2548 } 2549 2550 if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Tx) { 2551 ifp->if_csum_flags_tx |= M_CSUM_UDPv4; 2552 } 2553 if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Rx) { 2554 ifp->if_csum_flags_rx |= M_CSUM_UDPv4; 2555 } 2556 2557 if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Tx) { 2558 ifp->if_csum_flags_tx |= M_CSUM_TCPv6; 2559 } 2560 if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Rx) { 2561 ifp->if_csum_flags_rx |= M_CSUM_TCPv6; 2562 } 2563 2564 if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Tx) { 2565 ifp->if_csum_flags_tx |= M_CSUM_UDPv6; 2566 } 2567 if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Rx) { 2568 ifp->if_csum_flags_rx |= M_CSUM_UDPv6; 2569 } 2570 if (ifp->if_flags & IFF_UP) 2571 return ENETRESET; 2572 return 0; 2573 case SIOCSIFFLAGS: 2574 ifr = data; 2575 if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) { 2576 s = splnet(); 2577 if_down(ifp); 2578 splx(s); 2579 } 2580 if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) { 2581 s = splnet(); 2582 if_up(ifp); 2583 splx(s); 2584 } 2585 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 2586 (ifr->ifr_flags &~ IFF_CANTCHANGE); 2587 break; 2588 case SIOCGIFFLAGS: 2589 ifr = data; 2590 ifr->ifr_flags = ifp->if_flags; 2591 break; 2592 2593 case SIOCGIFMETRIC: 2594 ifr = data; 2595 ifr->ifr_metric = ifp->if_metric; 2596 break; 2597 2598 case SIOCGIFMTU: 2599 ifr = data; 2600 ifr->ifr_mtu = ifp->if_mtu; 2601 break; 2602 2603 case SIOCGIFDLT: 2604 ifr = data; 2605 ifr->ifr_dlt = ifp->if_dlt; 2606 break; 2607 2608 case SIOCGIFCAP: 2609 ifcr = data; 2610 ifcr->ifcr_capabilities = ifp->if_capabilities; 2611 ifcr->ifcr_capenable = ifp->if_capenable; 2612 break; 2613 2614 case SIOCSIFMETRIC: 2615 ifr = data; 2616 ifp->if_metric = ifr->ifr_metric; 2617 break; 2618 2619 case SIOCGIFDATA: 2620 ifdr = data; 2621 ifdr->ifdr_data = ifp->if_data; 2622 break; 2623 2624 case SIOCGIFINDEX: 2625 ifr = data; 2626 ifr->ifr_index = ifp->if_index; 2627 break; 2628 2629 case SIOCZIFDATA: 2630 ifdr = data; 2631 ifdr->ifdr_data = ifp->if_data; 2632 /* 2633 * Assumes that the volatile counters that can be 2634 * zero'ed are at the end of if_data. 2635 */ 2636 memset(&ifp->if_data.ifi_ipackets, 0, sizeof(ifp->if_data) - 2637 offsetof(struct if_data, ifi_ipackets)); 2638 /* 2639 * The memset() clears to the bottm of if_data. In the area, 2640 * if_lastchange is included. Please be careful if new entry 2641 * will be added into if_data or rewite this. 2642 * 2643 * And also, update if_lastchnage. 2644 */ 2645 getnanotime(&ifp->if_lastchange); 2646 break; 2647 case SIOCSIFMTU: 2648 ifr = data; 2649 if (ifp->if_mtu == ifr->ifr_mtu) 2650 break; 2651 ifp->if_mtu = ifr->ifr_mtu; 2652 /* 2653 * If the link MTU changed, do network layer specific procedure. 2654 */ 2655 #ifdef INET6 2656 if (in6_present) 2657 nd6_setmtu(ifp); 2658 #endif 2659 return ENETRESET; 2660 default: 2661 return ENOTTY; 2662 } 2663 return 0; 2664 } 2665 2666 int 2667 ifaddrpref_ioctl(struct socket *so, u_long cmd, void *data, struct ifnet *ifp) 2668 { 2669 struct if_addrprefreq *ifap = (struct if_addrprefreq *)data; 2670 struct ifaddr *ifa; 2671 const struct sockaddr *any, *sa; 2672 union { 2673 struct sockaddr sa; 2674 struct sockaddr_storage ss; 2675 } u, v; 2676 int s, error = 0; 2677 2678 switch (cmd) { 2679 case SIOCSIFADDRPREF: 2680 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_INTERFACE, 2681 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 2682 NULL) != 0) 2683 return EPERM; 2684 case SIOCGIFADDRPREF: 2685 break; 2686 default: 2687 return EOPNOTSUPP; 2688 } 2689 2690 /* sanity checks */ 2691 if (data == NULL || ifp == NULL) { 2692 panic("invalid argument to %s", __func__); 2693 /*NOTREACHED*/ 2694 } 2695 2696 /* address must be specified on ADD and DELETE */ 2697 sa = sstocsa(&ifap->ifap_addr); 2698 if (sa->sa_family != sofamily(so)) 2699 return EINVAL; 2700 if ((any = sockaddr_any(sa)) == NULL || sa->sa_len != any->sa_len) 2701 return EINVAL; 2702 2703 sockaddr_externalize(&v.sa, sizeof(v.ss), sa); 2704 2705 s = pserialize_read_enter(); 2706 IFADDR_READER_FOREACH(ifa, ifp) { 2707 if (ifa->ifa_addr->sa_family != sa->sa_family) 2708 continue; 2709 sockaddr_externalize(&u.sa, sizeof(u.ss), ifa->ifa_addr); 2710 if (sockaddr_cmp(&u.sa, &v.sa) == 0) 2711 break; 2712 } 2713 if (ifa == NULL) { 2714 error = EADDRNOTAVAIL; 2715 goto out; 2716 } 2717 2718 switch (cmd) { 2719 case SIOCSIFADDRPREF: 2720 ifa->ifa_preference = ifap->ifap_preference; 2721 goto out; 2722 case SIOCGIFADDRPREF: 2723 /* fill in the if_laddrreq structure */ 2724 (void)sockaddr_copy(sstosa(&ifap->ifap_addr), 2725 sizeof(ifap->ifap_addr), ifa->ifa_addr); 2726 ifap->ifap_preference = ifa->ifa_preference; 2727 goto out; 2728 default: 2729 error = EOPNOTSUPP; 2730 } 2731 out: 2732 pserialize_read_exit(s); 2733 return error; 2734 } 2735 2736 /* 2737 * Interface ioctls. 2738 */ 2739 static int 2740 doifioctl(struct socket *so, u_long cmd, void *data, struct lwp *l) 2741 { 2742 struct ifnet *ifp; 2743 struct ifreq *ifr; 2744 int error = 0; 2745 #if defined(COMPAT_OSOCK) || defined(COMPAT_OIFREQ) 2746 u_long ocmd = cmd; 2747 #endif 2748 short oif_flags; 2749 #ifdef COMPAT_OIFREQ 2750 struct ifreq ifrb; 2751 struct oifreq *oifr = NULL; 2752 #endif 2753 int r; 2754 struct psref psref; 2755 int bound; 2756 2757 switch (cmd) { 2758 #ifdef COMPAT_OIFREQ 2759 case OSIOCGIFCONF: 2760 case OOSIOCGIFCONF: 2761 return compat_ifconf(cmd, data); 2762 #endif 2763 #ifdef COMPAT_OIFDATA 2764 case OSIOCGIFDATA: 2765 case OSIOCZIFDATA: 2766 return compat_ifdatareq(l, cmd, data); 2767 #endif 2768 case SIOCGIFCONF: 2769 return ifconf(cmd, data); 2770 case SIOCINITIFADDR: 2771 return EPERM; 2772 } 2773 2774 #ifdef COMPAT_OIFREQ 2775 cmd = (*vec_compat_cvtcmd)(cmd); 2776 if (cmd != ocmd) { 2777 oifr = data; 2778 data = ifr = &ifrb; 2779 ifreqo2n(oifr, ifr); 2780 } else 2781 #endif 2782 ifr = data; 2783 2784 switch (cmd) { 2785 case SIOCIFCREATE: 2786 case SIOCIFDESTROY: 2787 bound = curlwp_bind(); 2788 if (l != NULL) { 2789 ifp = if_get(ifr->ifr_name, &psref); 2790 error = kauth_authorize_network(l->l_cred, 2791 KAUTH_NETWORK_INTERFACE, 2792 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, 2793 (void *)cmd, NULL); 2794 if (ifp != NULL) 2795 if_put(ifp, &psref); 2796 if (error != 0) { 2797 curlwp_bindx(bound); 2798 return error; 2799 } 2800 } 2801 mutex_enter(&if_clone_mtx); 2802 r = (cmd == SIOCIFCREATE) ? 2803 if_clone_create(ifr->ifr_name) : 2804 if_clone_destroy(ifr->ifr_name); 2805 mutex_exit(&if_clone_mtx); 2806 curlwp_bindx(bound); 2807 return r; 2808 2809 case SIOCIFGCLONERS: 2810 { 2811 struct if_clonereq *req = (struct if_clonereq *)data; 2812 return if_clone_list(req->ifcr_count, req->ifcr_buffer, 2813 &req->ifcr_total); 2814 } 2815 } 2816 2817 bound = curlwp_bind(); 2818 ifp = if_get(ifr->ifr_name, &psref); 2819 if (ifp == NULL) { 2820 curlwp_bindx(bound); 2821 return ENXIO; 2822 } 2823 2824 switch (cmd) { 2825 case SIOCALIFADDR: 2826 case SIOCDLIFADDR: 2827 case SIOCSIFADDRPREF: 2828 case SIOCSIFFLAGS: 2829 case SIOCSIFCAP: 2830 case SIOCSIFMETRIC: 2831 case SIOCZIFDATA: 2832 case SIOCSIFMTU: 2833 case SIOCSIFPHYADDR: 2834 case SIOCDIFPHYADDR: 2835 #ifdef INET6 2836 case SIOCSIFPHYADDR_IN6: 2837 #endif 2838 case SIOCSLIFPHYADDR: 2839 case SIOCADDMULTI: 2840 case SIOCDELMULTI: 2841 case SIOCSIFMEDIA: 2842 case SIOCSDRVSPEC: 2843 case SIOCG80211: 2844 case SIOCS80211: 2845 case SIOCS80211NWID: 2846 case SIOCS80211NWKEY: 2847 case SIOCS80211POWER: 2848 case SIOCS80211BSSID: 2849 case SIOCS80211CHANNEL: 2850 case SIOCSLINKSTR: 2851 if (l != NULL) { 2852 error = kauth_authorize_network(l->l_cred, 2853 KAUTH_NETWORK_INTERFACE, 2854 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, 2855 (void *)cmd, NULL); 2856 if (error != 0) 2857 goto out; 2858 } 2859 } 2860 2861 oif_flags = ifp->if_flags; 2862 2863 mutex_enter(ifp->if_ioctl_lock); 2864 2865 error = (*ifp->if_ioctl)(ifp, cmd, data); 2866 if (error != ENOTTY) 2867 ; 2868 else if (so->so_proto == NULL) 2869 error = EOPNOTSUPP; 2870 else { 2871 #ifdef COMPAT_OSOCK 2872 if (vec_compat_ifioctl != NULL) 2873 error = (*vec_compat_ifioctl)(so, ocmd, cmd, data, l); 2874 else 2875 #endif 2876 error = (*so->so_proto->pr_usrreqs->pr_ioctl)(so, 2877 cmd, data, ifp); 2878 } 2879 2880 if (((oif_flags ^ ifp->if_flags) & IFF_UP) != 0) { 2881 if ((ifp->if_flags & IFF_UP) != 0) { 2882 int s = splnet(); 2883 if_up(ifp); 2884 splx(s); 2885 } 2886 } 2887 #ifdef COMPAT_OIFREQ 2888 if (cmd != ocmd) 2889 ifreqn2o(oifr, ifr); 2890 #endif 2891 2892 mutex_exit(ifp->if_ioctl_lock); 2893 out: 2894 if_put(ifp, &psref); 2895 curlwp_bindx(bound); 2896 return error; 2897 } 2898 2899 /* 2900 * Return interface configuration 2901 * of system. List may be used 2902 * in later ioctl's (above) to get 2903 * other information. 2904 * 2905 * Each record is a struct ifreq. Before the addition of 2906 * sockaddr_storage, the API rule was that sockaddr flavors that did 2907 * not fit would extend beyond the struct ifreq, with the next struct 2908 * ifreq starting sa_len beyond the struct sockaddr. Because the 2909 * union in struct ifreq includes struct sockaddr_storage, every kind 2910 * of sockaddr must fit. Thus, there are no longer any overlength 2911 * records. 2912 * 2913 * Records are added to the user buffer if they fit, and ifc_len is 2914 * adjusted to the length that was written. Thus, the user is only 2915 * assured of getting the complete list if ifc_len on return is at 2916 * least sizeof(struct ifreq) less than it was on entry. 2917 * 2918 * If the user buffer pointer is NULL, this routine copies no data and 2919 * returns the amount of space that would be needed. 2920 * 2921 * Invariants: 2922 * ifrp points to the next part of the user's buffer to be used. If 2923 * ifrp != NULL, space holds the number of bytes remaining that we may 2924 * write at ifrp. Otherwise, space holds the number of bytes that 2925 * would have been written had there been adequate space. 2926 */ 2927 /*ARGSUSED*/ 2928 static int 2929 ifconf(u_long cmd, void *data) 2930 { 2931 struct ifconf *ifc = (struct ifconf *)data; 2932 struct ifnet *ifp; 2933 struct ifaddr *ifa; 2934 struct ifreq ifr, *ifrp = NULL; 2935 int space = 0, error = 0; 2936 const int sz = (int)sizeof(struct ifreq); 2937 const bool docopy = ifc->ifc_req != NULL; 2938 int s; 2939 int bound; 2940 struct psref psref; 2941 2942 if (docopy) { 2943 space = ifc->ifc_len; 2944 ifrp = ifc->ifc_req; 2945 } 2946 2947 bound = curlwp_bind(); 2948 s = pserialize_read_enter(); 2949 IFNET_READER_FOREACH(ifp) { 2950 psref_acquire(&psref, &ifp->if_psref, ifnet_psref_class); 2951 pserialize_read_exit(s); 2952 2953 (void)strncpy(ifr.ifr_name, ifp->if_xname, 2954 sizeof(ifr.ifr_name)); 2955 if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0') { 2956 error = ENAMETOOLONG; 2957 goto release_exit; 2958 } 2959 if (IFADDR_READER_EMPTY(ifp)) { 2960 /* Interface with no addresses - send zero sockaddr. */ 2961 memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr)); 2962 if (!docopy) { 2963 space += sz; 2964 continue; 2965 } 2966 if (space >= sz) { 2967 error = copyout(&ifr, ifrp, sz); 2968 if (error != 0) 2969 goto release_exit; 2970 ifrp++; 2971 space -= sz; 2972 } 2973 } 2974 2975 IFADDR_READER_FOREACH(ifa, ifp) { 2976 struct sockaddr *sa = ifa->ifa_addr; 2977 /* all sockaddrs must fit in sockaddr_storage */ 2978 KASSERT(sa->sa_len <= sizeof(ifr.ifr_ifru)); 2979 2980 if (!docopy) { 2981 space += sz; 2982 continue; 2983 } 2984 memcpy(&ifr.ifr_space, sa, sa->sa_len); 2985 if (space >= sz) { 2986 error = copyout(&ifr, ifrp, sz); 2987 if (error != 0) 2988 goto release_exit; 2989 ifrp++; space -= sz; 2990 } 2991 } 2992 2993 s = pserialize_read_enter(); 2994 psref_release(&psref, &ifp->if_psref, ifnet_psref_class); 2995 } 2996 pserialize_read_exit(s); 2997 curlwp_bindx(bound); 2998 2999 if (docopy) { 3000 KASSERT(0 <= space && space <= ifc->ifc_len); 3001 ifc->ifc_len -= space; 3002 } else { 3003 KASSERT(space >= 0); 3004 ifc->ifc_len = space; 3005 } 3006 return (0); 3007 3008 release_exit: 3009 psref_release(&psref, &ifp->if_psref, ifnet_psref_class); 3010 curlwp_bindx(bound); 3011 return error; 3012 } 3013 3014 int 3015 ifreq_setaddr(u_long cmd, struct ifreq *ifr, const struct sockaddr *sa) 3016 { 3017 uint8_t len; 3018 #ifdef COMPAT_OIFREQ 3019 struct ifreq ifrb; 3020 struct oifreq *oifr = NULL; 3021 u_long ocmd = cmd; 3022 cmd = (*vec_compat_cvtcmd)(cmd); 3023 if (cmd != ocmd) { 3024 oifr = (struct oifreq *)(void *)ifr; 3025 ifr = &ifrb; 3026 ifreqo2n(oifr, ifr); 3027 len = sizeof(oifr->ifr_addr); 3028 } else 3029 #endif 3030 len = sizeof(ifr->ifr_ifru.ifru_space); 3031 3032 if (len < sa->sa_len) 3033 return EFBIG; 3034 3035 memset(&ifr->ifr_addr, 0, len); 3036 sockaddr_copy(&ifr->ifr_addr, len, sa); 3037 3038 #ifdef COMPAT_OIFREQ 3039 if (cmd != ocmd) 3040 ifreqn2o(oifr, ifr); 3041 #endif 3042 return 0; 3043 } 3044 3045 /* 3046 * wrapper function for the drivers which doesn't have if_transmit(). 3047 */ 3048 static int 3049 if_transmit(struct ifnet *ifp, struct mbuf *m) 3050 { 3051 int s, error; 3052 3053 s = splnet(); 3054 3055 IFQ_ENQUEUE(&ifp->if_snd, m, error); 3056 if (error != 0) { 3057 /* mbuf is already freed */ 3058 goto out; 3059 } 3060 3061 ifp->if_obytes += m->m_pkthdr.len;; 3062 if (m->m_flags & M_MCAST) 3063 ifp->if_omcasts++; 3064 3065 if ((ifp->if_flags & IFF_OACTIVE) == 0) 3066 if_start_lock(ifp); 3067 out: 3068 splx(s); 3069 3070 return error; 3071 } 3072 3073 int 3074 if_transmit_lock(struct ifnet *ifp, struct mbuf *m) 3075 { 3076 int error; 3077 3078 #ifdef ALTQ 3079 KERNEL_LOCK(1, NULL); 3080 if (ALTQ_IS_ENABLED(&ifp->if_snd)) { 3081 error = if_transmit(ifp, m); 3082 KERNEL_UNLOCK_ONE(NULL); 3083 } else { 3084 KERNEL_UNLOCK_ONE(NULL); 3085 error = (*ifp->if_transmit)(ifp, m); 3086 } 3087 #else /* !ALTQ */ 3088 error = (*ifp->if_transmit)(ifp, m); 3089 #endif /* !ALTQ */ 3090 3091 return error; 3092 } 3093 3094 /* 3095 * Queue message on interface, and start output if interface 3096 * not yet active. 3097 */ 3098 int 3099 ifq_enqueue(struct ifnet *ifp, struct mbuf *m) 3100 { 3101 3102 return if_transmit_lock(ifp, m); 3103 } 3104 3105 /* 3106 * Queue message on interface, possibly using a second fast queue 3107 */ 3108 int 3109 ifq_enqueue2(struct ifnet *ifp, struct ifqueue *ifq, struct mbuf *m) 3110 { 3111 int error = 0; 3112 3113 if (ifq != NULL 3114 #ifdef ALTQ 3115 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 3116 #endif 3117 ) { 3118 if (IF_QFULL(ifq)) { 3119 IF_DROP(&ifp->if_snd); 3120 m_freem(m); 3121 if (error == 0) 3122 error = ENOBUFS; 3123 } else 3124 IF_ENQUEUE(ifq, m); 3125 } else 3126 IFQ_ENQUEUE(&ifp->if_snd, m, error); 3127 if (error != 0) { 3128 ++ifp->if_oerrors; 3129 return error; 3130 } 3131 return 0; 3132 } 3133 3134 int 3135 if_addr_init(ifnet_t *ifp, struct ifaddr *ifa, const bool src) 3136 { 3137 int rc; 3138 3139 if (ifp->if_initaddr != NULL) 3140 rc = (*ifp->if_initaddr)(ifp, ifa, src); 3141 else if (src || 3142 /* FIXME: may not hold if_ioctl_lock */ 3143 (rc = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, ifa)) == ENOTTY) 3144 rc = (*ifp->if_ioctl)(ifp, SIOCINITIFADDR, ifa); 3145 3146 return rc; 3147 } 3148 3149 int 3150 if_do_dad(struct ifnet *ifp) 3151 { 3152 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 3153 return 0; 3154 3155 switch (ifp->if_type) { 3156 case IFT_FAITH: 3157 /* 3158 * These interfaces do not have the IFF_LOOPBACK flag, 3159 * but loop packets back. We do not have to do DAD on such 3160 * interfaces. We should even omit it, because loop-backed 3161 * responses would confuse the DAD procedure. 3162 */ 3163 return 0; 3164 default: 3165 /* 3166 * Our DAD routine requires the interface up and running. 3167 * However, some interfaces can be up before the RUNNING 3168 * status. Additionaly, users may try to assign addresses 3169 * before the interface becomes up (or running). 3170 * We simply skip DAD in such a case as a work around. 3171 * XXX: we should rather mark "tentative" on such addresses, 3172 * and do DAD after the interface becomes ready. 3173 */ 3174 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 3175 (IFF_UP|IFF_RUNNING)) 3176 return 0; 3177 3178 return 1; 3179 } 3180 } 3181 3182 int 3183 if_flags_set(ifnet_t *ifp, const short flags) 3184 { 3185 int rc; 3186 3187 if (ifp->if_setflags != NULL) 3188 rc = (*ifp->if_setflags)(ifp, flags); 3189 else { 3190 short cantflags, chgdflags; 3191 struct ifreq ifr; 3192 3193 chgdflags = ifp->if_flags ^ flags; 3194 cantflags = chgdflags & IFF_CANTCHANGE; 3195 3196 if (cantflags != 0) 3197 ifp->if_flags ^= cantflags; 3198 3199 /* Traditionally, we do not call if_ioctl after 3200 * setting/clearing only IFF_PROMISC if the interface 3201 * isn't IFF_UP. Uphold that tradition. 3202 */ 3203 if (chgdflags == IFF_PROMISC && (ifp->if_flags & IFF_UP) == 0) 3204 return 0; 3205 3206 memset(&ifr, 0, sizeof(ifr)); 3207 3208 ifr.ifr_flags = flags & ~IFF_CANTCHANGE; 3209 /* FIXME: may not hold if_ioctl_lock */ 3210 rc = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, &ifr); 3211 3212 if (rc != 0 && cantflags != 0) 3213 ifp->if_flags ^= cantflags; 3214 } 3215 3216 return rc; 3217 } 3218 3219 int 3220 if_mcast_op(ifnet_t *ifp, const unsigned long cmd, const struct sockaddr *sa) 3221 { 3222 int rc; 3223 struct ifreq ifr; 3224 3225 if (ifp->if_mcastop != NULL) 3226 rc = (*ifp->if_mcastop)(ifp, cmd, sa); 3227 else { 3228 ifreq_setaddr(cmd, &ifr, sa); 3229 rc = (*ifp->if_ioctl)(ifp, cmd, &ifr); 3230 } 3231 3232 return rc; 3233 } 3234 3235 static void 3236 sysctl_sndq_setup(struct sysctllog **clog, const char *ifname, 3237 struct ifaltq *ifq) 3238 { 3239 const struct sysctlnode *cnode, *rnode; 3240 3241 if (sysctl_createv(clog, 0, NULL, &rnode, 3242 CTLFLAG_PERMANENT, 3243 CTLTYPE_NODE, "interfaces", 3244 SYSCTL_DESCR("Per-interface controls"), 3245 NULL, 0, NULL, 0, 3246 CTL_NET, CTL_CREATE, CTL_EOL) != 0) 3247 goto bad; 3248 3249 if (sysctl_createv(clog, 0, &rnode, &rnode, 3250 CTLFLAG_PERMANENT, 3251 CTLTYPE_NODE, ifname, 3252 SYSCTL_DESCR("Interface controls"), 3253 NULL, 0, NULL, 0, 3254 CTL_CREATE, CTL_EOL) != 0) 3255 goto bad; 3256 3257 if (sysctl_createv(clog, 0, &rnode, &rnode, 3258 CTLFLAG_PERMANENT, 3259 CTLTYPE_NODE, "sndq", 3260 SYSCTL_DESCR("Interface output queue controls"), 3261 NULL, 0, NULL, 0, 3262 CTL_CREATE, CTL_EOL) != 0) 3263 goto bad; 3264 3265 if (sysctl_createv(clog, 0, &rnode, &cnode, 3266 CTLFLAG_PERMANENT, 3267 CTLTYPE_INT, "len", 3268 SYSCTL_DESCR("Current output queue length"), 3269 NULL, 0, &ifq->ifq_len, 0, 3270 CTL_CREATE, CTL_EOL) != 0) 3271 goto bad; 3272 3273 if (sysctl_createv(clog, 0, &rnode, &cnode, 3274 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 3275 CTLTYPE_INT, "maxlen", 3276 SYSCTL_DESCR("Maximum allowed output queue length"), 3277 NULL, 0, &ifq->ifq_maxlen, 0, 3278 CTL_CREATE, CTL_EOL) != 0) 3279 goto bad; 3280 3281 if (sysctl_createv(clog, 0, &rnode, &cnode, 3282 CTLFLAG_PERMANENT, 3283 CTLTYPE_INT, "drops", 3284 SYSCTL_DESCR("Packets dropped due to full output queue"), 3285 NULL, 0, &ifq->ifq_drops, 0, 3286 CTL_CREATE, CTL_EOL) != 0) 3287 goto bad; 3288 3289 return; 3290 bad: 3291 printf("%s: could not attach sysctl nodes\n", ifname); 3292 return; 3293 } 3294 3295 #if defined(INET) || defined(INET6) 3296 3297 #define SYSCTL_NET_PKTQ(q, cn, c) \ 3298 static int \ 3299 sysctl_net_##q##_##cn(SYSCTLFN_ARGS) \ 3300 { \ 3301 return sysctl_pktq_count(SYSCTLFN_CALL(rnode), q, c); \ 3302 } 3303 3304 #if defined(INET) 3305 static int 3306 sysctl_net_ip_pktq_maxlen(SYSCTLFN_ARGS) 3307 { 3308 return sysctl_pktq_maxlen(SYSCTLFN_CALL(rnode), ip_pktq); 3309 } 3310 SYSCTL_NET_PKTQ(ip_pktq, items, PKTQ_NITEMS) 3311 SYSCTL_NET_PKTQ(ip_pktq, drops, PKTQ_DROPS) 3312 #endif 3313 3314 #if defined(INET6) 3315 static int 3316 sysctl_net_ip6_pktq_maxlen(SYSCTLFN_ARGS) 3317 { 3318 return sysctl_pktq_maxlen(SYSCTLFN_CALL(rnode), ip6_pktq); 3319 } 3320 SYSCTL_NET_PKTQ(ip6_pktq, items, PKTQ_NITEMS) 3321 SYSCTL_NET_PKTQ(ip6_pktq, drops, PKTQ_DROPS) 3322 #endif 3323 3324 static void 3325 sysctl_net_pktq_setup(struct sysctllog **clog, int pf) 3326 { 3327 sysctlfn len_func = NULL, maxlen_func = NULL, drops_func = NULL; 3328 const char *pfname = NULL, *ipname = NULL; 3329 int ipn = 0, qid = 0; 3330 3331 switch (pf) { 3332 #if defined(INET) 3333 case PF_INET: 3334 len_func = sysctl_net_ip_pktq_items; 3335 maxlen_func = sysctl_net_ip_pktq_maxlen; 3336 drops_func = sysctl_net_ip_pktq_drops; 3337 pfname = "inet", ipn = IPPROTO_IP; 3338 ipname = "ip", qid = IPCTL_IFQ; 3339 break; 3340 #endif 3341 #if defined(INET6) 3342 case PF_INET6: 3343 len_func = sysctl_net_ip6_pktq_items; 3344 maxlen_func = sysctl_net_ip6_pktq_maxlen; 3345 drops_func = sysctl_net_ip6_pktq_drops; 3346 pfname = "inet6", ipn = IPPROTO_IPV6; 3347 ipname = "ip6", qid = IPV6CTL_IFQ; 3348 break; 3349 #endif 3350 default: 3351 KASSERT(false); 3352 } 3353 3354 sysctl_createv(clog, 0, NULL, NULL, 3355 CTLFLAG_PERMANENT, 3356 CTLTYPE_NODE, pfname, NULL, 3357 NULL, 0, NULL, 0, 3358 CTL_NET, pf, CTL_EOL); 3359 sysctl_createv(clog, 0, NULL, NULL, 3360 CTLFLAG_PERMANENT, 3361 CTLTYPE_NODE, ipname, NULL, 3362 NULL, 0, NULL, 0, 3363 CTL_NET, pf, ipn, CTL_EOL); 3364 sysctl_createv(clog, 0, NULL, NULL, 3365 CTLFLAG_PERMANENT, 3366 CTLTYPE_NODE, "ifq", 3367 SYSCTL_DESCR("Protocol input queue controls"), 3368 NULL, 0, NULL, 0, 3369 CTL_NET, pf, ipn, qid, CTL_EOL); 3370 3371 sysctl_createv(clog, 0, NULL, NULL, 3372 CTLFLAG_PERMANENT, 3373 CTLTYPE_INT, "len", 3374 SYSCTL_DESCR("Current input queue length"), 3375 len_func, 0, NULL, 0, 3376 CTL_NET, pf, ipn, qid, IFQCTL_LEN, CTL_EOL); 3377 sysctl_createv(clog, 0, NULL, NULL, 3378 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 3379 CTLTYPE_INT, "maxlen", 3380 SYSCTL_DESCR("Maximum allowed input queue length"), 3381 maxlen_func, 0, NULL, 0, 3382 CTL_NET, pf, ipn, qid, IFQCTL_MAXLEN, CTL_EOL); 3383 sysctl_createv(clog, 0, NULL, NULL, 3384 CTLFLAG_PERMANENT, 3385 CTLTYPE_INT, "drops", 3386 SYSCTL_DESCR("Packets dropped due to full input queue"), 3387 drops_func, 0, NULL, 0, 3388 CTL_NET, pf, ipn, qid, IFQCTL_DROPS, CTL_EOL); 3389 } 3390 #endif /* INET || INET6 */ 3391 3392 static int 3393 if_sdl_sysctl(SYSCTLFN_ARGS) 3394 { 3395 struct ifnet *ifp; 3396 const struct sockaddr_dl *sdl; 3397 struct psref psref; 3398 int error = 0; 3399 int bound; 3400 3401 if (namelen != 1) 3402 return EINVAL; 3403 3404 bound = curlwp_bind(); 3405 ifp = if_get_byindex(name[0], &psref); 3406 if (ifp == NULL) { 3407 error = ENODEV; 3408 goto out0; 3409 } 3410 3411 sdl = ifp->if_sadl; 3412 if (sdl == NULL) { 3413 *oldlenp = 0; 3414 goto out1; 3415 } 3416 3417 if (oldp == NULL) { 3418 *oldlenp = sdl->sdl_alen; 3419 goto out1; 3420 } 3421 3422 if (*oldlenp >= sdl->sdl_alen) 3423 *oldlenp = sdl->sdl_alen; 3424 error = sysctl_copyout(l, &sdl->sdl_data[sdl->sdl_nlen], oldp, *oldlenp); 3425 out1: 3426 if_put(ifp, &psref); 3427 out0: 3428 curlwp_bindx(bound); 3429 return error; 3430 } 3431 3432 SYSCTL_SETUP(sysctl_net_sdl_setup, "sysctl net.sdl subtree setup") 3433 { 3434 const struct sysctlnode *rnode = NULL; 3435 3436 sysctl_createv(clog, 0, NULL, &rnode, 3437 CTLFLAG_PERMANENT, 3438 CTLTYPE_NODE, "sdl", 3439 SYSCTL_DESCR("Get active link-layer address"), 3440 if_sdl_sysctl, 0, NULL, 0, 3441 CTL_NET, CTL_CREATE, CTL_EOL); 3442 } 3443
Indexes created Mon Sep 22 13:09:51 GMT 2025