if.c revision 1.241
1 /* $NetBSD: if.c,v 1.241 2009/11/13 23:11:08 joerg 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 1.241 2009/11/13 23:11:08 joerg Exp $"); 94 95 #include "opt_inet.h" 96 97 #include "opt_atalk.h" 98 #include "opt_natm.h" 99 #include "opt_pfil_hooks.h" 100 101 #include <sys/param.h> 102 #include <sys/mbuf.h> 103 #include <sys/systm.h> 104 #include <sys/callout.h> 105 #include <sys/proc.h> 106 #include <sys/socket.h> 107 #include <sys/socketvar.h> 108 #include <sys/domain.h> 109 #include <sys/protosw.h> 110 #include <sys/kernel.h> 111 #include <sys/ioctl.h> 112 #include <sys/sysctl.h> 113 #include <sys/syslog.h> 114 #include <sys/kauth.h> 115 116 #include <net/if.h> 117 #include <net/if_dl.h> 118 #include <net/if_ether.h> 119 #include <net/if_media.h> 120 #include <net80211/ieee80211.h> 121 #include <net80211/ieee80211_ioctl.h> 122 #include <net/if_types.h> 123 #include <net/radix.h> 124 #include <net/route.h> 125 #include <net/netisr.h> 126 #ifdef NETATALK 127 #include <netatalk/at_extern.h> 128 #include <netatalk/at.h> 129 #endif 130 #include <net/pfil.h> 131 132 #ifdef INET6 133 #include <netinet/in.h> 134 #include <netinet6/in6_var.h> 135 #include <netinet6/nd6.h> 136 #endif 137 138 #include "carp.h" 139 #if NCARP > 0 140 #include <netinet/ip_carp.h> 141 #endif 142 143 #include <compat/sys/sockio.h> 144 #include <compat/sys/socket.h> 145 146 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 147 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 148 149 int ifqmaxlen = IFQ_MAXLEN; 150 callout_t if_slowtimo_ch; 151 152 int netisr; /* scheduling bits for network */ 153 154 static int if_rt_walktree(struct rtentry *, void *); 155 156 static struct if_clone *if_clone_lookup(const char *, int *); 157 static int if_clone_list(struct if_clonereq *); 158 159 static LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners); 160 static int if_cloners_count; 161 162 static uint64_t index_gen; 163 static kmutex_t index_gen_mtx; 164 165 #ifdef PFIL_HOOKS 166 struct pfil_head if_pfil; /* packet filtering hook for interfaces */ 167 #endif 168 169 static kauth_listener_t if_listener; 170 171 static void if_detach_queues(struct ifnet *, struct ifqueue *); 172 static void sysctl_sndq_setup(struct sysctllog **, const char *, 173 struct ifaltq *); 174 175 #if defined(INET) || defined(INET6) 176 static void sysctl_net_ifq_setup(struct sysctllog **, int, const char *, 177 int, const char *, int, struct ifqueue *); 178 #endif 179 180 static int 181 if_listener_cb(kauth_cred_t cred, kauth_action_t action, void *cookie, 182 void *arg0, void *arg1, void *arg2, void *arg3) 183 { 184 int result; 185 enum kauth_network_req req; 186 187 result = KAUTH_RESULT_DEFER; 188 req = (enum kauth_network_req)arg1; 189 190 if (action != KAUTH_NETWORK_INTERFACE) 191 return result; 192 193 if ((req == KAUTH_REQ_NETWORK_INTERFACE_GET) || 194 (req == KAUTH_REQ_NETWORK_INTERFACE_SET)) 195 result = KAUTH_RESULT_ALLOW; 196 197 return result; 198 } 199 200 /* 201 * Network interface utility routines. 202 * 203 * Routines with ifa_ifwith* names take sockaddr *'s as 204 * parameters. 205 */ 206 void 207 ifinit(void) 208 { 209 #ifdef INET 210 {extern struct ifqueue ipintrq; 211 sysctl_net_ifq_setup(NULL, PF_INET, "inet", IPPROTO_IP, "ip", 212 IPCTL_IFQ, &ipintrq);} 213 #endif /* INET */ 214 #ifdef INET6 215 {extern struct ifqueue ip6intrq; 216 sysctl_net_ifq_setup(NULL, PF_INET6, "inet6", IPPROTO_IPV6, "ip6", 217 IPV6CTL_IFQ, &ip6intrq);} 218 #endif /* INET6 */ 219 220 callout_init(&if_slowtimo_ch, 0); 221 if_slowtimo(NULL); 222 223 if_listener = kauth_listen_scope(KAUTH_SCOPE_NETWORK, 224 if_listener_cb, NULL); 225 } 226 227 /* 228 * XXX Initialization before configure(). 229 * XXX hack to get pfil_add_hook working in autoconf. 230 */ 231 void 232 ifinit1(void) 233 { 234 235 mutex_init(&index_gen_mtx, MUTEX_DEFAULT, IPL_NONE); 236 237 #ifdef PFIL_HOOKS 238 if_pfil.ph_type = PFIL_TYPE_IFNET; 239 if_pfil.ph_ifnet = NULL; 240 if (pfil_head_register(&if_pfil) != 0) 241 printf("WARNING: unable to register pfil hook\n"); 242 #endif 243 } 244 245 struct ifnet * 246 if_alloc(u_char type) 247 { 248 return malloc(sizeof(struct ifnet), M_DEVBUF, M_WAITOK|M_ZERO); 249 } 250 251 void 252 if_initname(struct ifnet *ifp, const char *name, int unit) 253 { 254 (void)snprintf(ifp->if_xname, sizeof(ifp->if_xname), 255 "%s%d", name, unit); 256 } 257 258 /* 259 * Null routines used while an interface is going away. These routines 260 * just return an error. 261 */ 262 263 int 264 if_nulloutput(struct ifnet *ifp, struct mbuf *m, 265 const struct sockaddr *so, struct rtentry *rt) 266 { 267 268 return ENXIO; 269 } 270 271 void 272 if_nullinput(struct ifnet *ifp, struct mbuf *m) 273 { 274 275 /* Nothing. */ 276 } 277 278 void 279 if_nullstart(struct ifnet *ifp) 280 { 281 282 /* Nothing. */ 283 } 284 285 int 286 if_nullioctl(struct ifnet *ifp, u_long cmd, void *data) 287 { 288 289 return ENXIO; 290 } 291 292 int 293 if_nullinit(struct ifnet *ifp) 294 { 295 296 return ENXIO; 297 } 298 299 void 300 if_nullstop(struct ifnet *ifp, int disable) 301 { 302 303 /* Nothing. */ 304 } 305 306 void 307 if_nullwatchdog(struct ifnet *ifp) 308 { 309 310 /* Nothing. */ 311 } 312 313 void 314 if_nulldrain(struct ifnet *ifp) 315 { 316 317 /* Nothing. */ 318 } 319 320 static u_int if_index = 1; 321 struct ifnet_head ifnet; 322 size_t if_indexlim = 0; 323 struct ifaddr **ifnet_addrs = NULL; 324 struct ifnet **ifindex2ifnet = NULL; 325 struct ifnet *lo0ifp; 326 327 void 328 if_set_sadl(struct ifnet *ifp, const void *lla, u_char addrlen, bool factory) 329 { 330 struct ifaddr *ifa; 331 struct sockaddr_dl *sdl; 332 333 ifp->if_addrlen = addrlen; 334 if_alloc_sadl(ifp); 335 ifa = ifp->if_dl; 336 sdl = satosdl(ifa->ifa_addr); 337 338 (void)sockaddr_dl_setaddr(sdl, sdl->sdl_len, lla, ifp->if_addrlen); 339 if (factory) { 340 ifp->if_hwdl = ifp->if_dl; 341 IFAREF(ifp->if_hwdl); 342 } 343 /* TBD routing socket */ 344 } 345 346 struct ifaddr * 347 if_dl_create(const struct ifnet *ifp, const struct sockaddr_dl **sdlp) 348 { 349 unsigned socksize, ifasize; 350 int addrlen, namelen; 351 struct sockaddr_dl *mask, *sdl; 352 struct ifaddr *ifa; 353 354 namelen = strlen(ifp->if_xname); 355 addrlen = ifp->if_addrlen; 356 socksize = roundup(sockaddr_dl_measure(namelen, addrlen), sizeof(long)); 357 ifasize = sizeof(*ifa) + 2 * socksize; 358 ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK|M_ZERO); 359 360 sdl = (struct sockaddr_dl *)(ifa + 1); 361 mask = (struct sockaddr_dl *)(socksize + (char *)sdl); 362 363 sockaddr_dl_init(sdl, socksize, ifp->if_index, ifp->if_type, 364 ifp->if_xname, namelen, NULL, addrlen); 365 mask->sdl_len = sockaddr_dl_measure(namelen, 0); 366 memset(&mask->sdl_data[0], 0xff, namelen); 367 ifa->ifa_rtrequest = link_rtrequest; 368 ifa->ifa_addr = (struct sockaddr *)sdl; 369 ifa->ifa_netmask = (struct sockaddr *)mask; 370 371 *sdlp = sdl; 372 373 return ifa; 374 } 375 376 static void 377 if_sadl_setrefs(struct ifnet *ifp, struct ifaddr *ifa) 378 { 379 const struct sockaddr_dl *sdl; 380 ifnet_addrs[ifp->if_index] = ifa; 381 IFAREF(ifa); 382 ifp->if_dl = ifa; 383 IFAREF(ifa); 384 sdl = satosdl(ifa->ifa_addr); 385 ifp->if_sadl = sdl; 386 } 387 388 /* 389 * Allocate the link level name for the specified interface. This 390 * is an attachment helper. It must be called after ifp->if_addrlen 391 * is initialized, which may not be the case when if_attach() is 392 * called. 393 */ 394 void 395 if_alloc_sadl(struct ifnet *ifp) 396 { 397 struct ifaddr *ifa; 398 const struct sockaddr_dl *sdl; 399 400 /* 401 * If the interface already has a link name, release it 402 * now. This is useful for interfaces that can change 403 * link types, and thus switch link names often. 404 */ 405 if (ifp->if_sadl != NULL) 406 if_free_sadl(ifp); 407 408 ifa = if_dl_create(ifp, &sdl); 409 410 ifa_insert(ifp, ifa); 411 if_sadl_setrefs(ifp, ifa); 412 } 413 414 static void 415 if_deactivate_sadl(struct ifnet *ifp) 416 { 417 struct ifaddr *ifa; 418 419 KASSERT(ifp->if_dl != NULL); 420 421 ifa = ifp->if_dl; 422 423 ifp->if_sadl = NULL; 424 425 ifnet_addrs[ifp->if_index] = NULL; 426 IFAFREE(ifa); 427 ifp->if_dl = NULL; 428 IFAFREE(ifa); 429 } 430 431 void 432 if_activate_sadl(struct ifnet *ifp, struct ifaddr *ifa, 433 const struct sockaddr_dl *sdl) 434 { 435 int s; 436 437 s = splnet(); 438 439 if_deactivate_sadl(ifp); 440 441 if_sadl_setrefs(ifp, ifa); 442 IFADDR_FOREACH(ifa, ifp) 443 rtinit(ifa, RTM_LLINFO_UPD, 0); 444 splx(s); 445 } 446 447 /* 448 * Free the link level name for the specified interface. This is 449 * a detach helper. This is called from if_detach() or from 450 * link layer type specific detach functions. 451 */ 452 void 453 if_free_sadl(struct ifnet *ifp) 454 { 455 struct ifaddr *ifa; 456 int s; 457 458 ifa = ifnet_addrs[ifp->if_index]; 459 if (ifa == NULL) { 460 KASSERT(ifp->if_sadl == NULL); 461 KASSERT(ifp->if_dl == NULL); 462 return; 463 } 464 465 KASSERT(ifp->if_sadl != NULL); 466 KASSERT(ifp->if_dl != NULL); 467 468 s = splnet(); 469 rtinit(ifa, RTM_DELETE, 0); 470 ifa_remove(ifp, ifa); 471 if_deactivate_sadl(ifp); 472 if (ifp->if_hwdl == ifa) { 473 IFAFREE(ifa); 474 ifp->if_hwdl = NULL; 475 } 476 splx(s); 477 } 478 479 /* 480 * Attach an interface to the 481 * list of "active" interfaces. 482 */ 483 void 484 if_attach(struct ifnet *ifp) 485 { 486 int indexlim = 0; 487 488 if (if_indexlim == 0) { 489 TAILQ_INIT(&ifnet); 490 if_indexlim = 8; 491 } 492 TAILQ_INIT(&ifp->if_addrlist); 493 TAILQ_INSERT_TAIL(&ifnet, ifp, if_list); 494 if (ifp->if_ioctl == NULL) 495 ifp->if_ioctl = ifioctl_common; 496 497 mutex_enter(&index_gen_mtx); 498 ifp->if_index_gen = index_gen++; 499 mutex_exit(&index_gen_mtx); 500 501 ifp->if_index = if_index; 502 if (ifindex2ifnet == NULL) 503 if_index++; 504 else 505 while (ifp->if_index < if_indexlim && 506 ifindex2ifnet[ifp->if_index] != NULL) { 507 ++if_index; 508 if (if_index == 0) 509 if_index = 1; 510 /* 511 * If we hit USHRT_MAX, we skip back to 0 since 512 * there are a number of places where the value 513 * of if_index or if_index itself is compared 514 * to or stored in an unsigned short. By 515 * jumping back, we won't botch those assignments 516 * or comparisons. 517 */ 518 else if (if_index == USHRT_MAX) { 519 /* 520 * However, if we have to jump back to 521 * zero *twice* without finding an empty 522 * slot in ifindex2ifnet[], then there 523 * there are too many (>65535) interfaces. 524 */ 525 if (indexlim++) 526 panic("too many interfaces"); 527 else 528 if_index = 1; 529 } 530 ifp->if_index = if_index; 531 } 532 533 /* 534 * We have some arrays that should be indexed by if_index. 535 * since if_index will grow dynamically, they should grow too. 536 * struct ifadd **ifnet_addrs 537 * struct ifnet **ifindex2ifnet 538 */ 539 if (ifnet_addrs == NULL || ifindex2ifnet == NULL || 540 ifp->if_index >= if_indexlim) { 541 size_t m, n, oldlim; 542 void *q; 543 544 oldlim = if_indexlim; 545 while (ifp->if_index >= if_indexlim) 546 if_indexlim <<= 1; 547 548 /* grow ifnet_addrs */ 549 m = oldlim * sizeof(struct ifaddr *); 550 n = if_indexlim * sizeof(struct ifaddr *); 551 q = malloc(n, M_IFADDR, M_WAITOK|M_ZERO); 552 if (ifnet_addrs != NULL) { 553 memcpy(q, ifnet_addrs, m); 554 free(ifnet_addrs, M_IFADDR); 555 } 556 ifnet_addrs = (struct ifaddr **)q; 557 558 /* grow ifindex2ifnet */ 559 m = oldlim * sizeof(struct ifnet *); 560 n = if_indexlim * sizeof(struct ifnet *); 561 q = malloc(n, M_IFADDR, M_WAITOK|M_ZERO); 562 if (ifindex2ifnet != NULL) { 563 memcpy(q, ifindex2ifnet, m); 564 free(ifindex2ifnet, M_IFADDR); 565 } 566 ifindex2ifnet = (struct ifnet **)q; 567 } 568 569 ifindex2ifnet[ifp->if_index] = ifp; 570 571 /* 572 * Link level name is allocated later by a separate call to 573 * if_alloc_sadl(). 574 */ 575 576 if (ifp->if_snd.ifq_maxlen == 0) 577 ifp->if_snd.ifq_maxlen = ifqmaxlen; 578 579 sysctl_sndq_setup(&ifp->if_sysctl_log, ifp->if_xname, &ifp->if_snd); 580 581 ifp->if_broadcastaddr = 0; /* reliably crash if used uninitialized */ 582 583 ifp->if_link_state = LINK_STATE_UNKNOWN; 584 585 ifp->if_capenable = 0; 586 ifp->if_csum_flags_tx = 0; 587 ifp->if_csum_flags_rx = 0; 588 589 #ifdef ALTQ 590 ifp->if_snd.altq_type = 0; 591 ifp->if_snd.altq_disc = NULL; 592 ifp->if_snd.altq_flags &= ALTQF_CANTCHANGE; 593 ifp->if_snd.altq_tbr = NULL; 594 ifp->if_snd.altq_ifp = ifp; 595 #endif 596 597 #ifdef PFIL_HOOKS 598 ifp->if_pfil.ph_type = PFIL_TYPE_IFNET; 599 ifp->if_pfil.ph_ifnet = ifp; 600 if (pfil_head_register(&ifp->if_pfil) != 0) 601 printf("%s: WARNING: unable to register pfil hook\n", 602 ifp->if_xname); 603 (void)pfil_run_hooks(&if_pfil, 604 (struct mbuf **)PFIL_IFNET_ATTACH, ifp, PFIL_IFNET); 605 #endif 606 607 if (!STAILQ_EMPTY(&domains)) 608 if_attachdomain1(ifp); 609 610 /* Announce the interface. */ 611 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 612 } 613 614 void 615 if_attachdomain(void) 616 { 617 struct ifnet *ifp; 618 int s; 619 620 s = splnet(); 621 IFNET_FOREACH(ifp) 622 if_attachdomain1(ifp); 623 splx(s); 624 } 625 626 void 627 if_attachdomain1(struct ifnet *ifp) 628 { 629 struct domain *dp; 630 int s; 631 632 s = splnet(); 633 634 /* address family dependent data region */ 635 memset(ifp->if_afdata, 0, sizeof(ifp->if_afdata)); 636 DOMAIN_FOREACH(dp) { 637 if (dp->dom_ifattach != NULL) 638 ifp->if_afdata[dp->dom_family] = 639 (*dp->dom_ifattach)(ifp); 640 } 641 642 splx(s); 643 } 644 645 /* 646 * Deactivate an interface. This points all of the procedure 647 * handles at error stubs. May be called from interrupt context. 648 */ 649 void 650 if_deactivate(struct ifnet *ifp) 651 { 652 int s; 653 654 s = splnet(); 655 656 ifp->if_output = if_nulloutput; 657 ifp->if_input = if_nullinput; 658 ifp->if_start = if_nullstart; 659 ifp->if_ioctl = if_nullioctl; 660 ifp->if_init = if_nullinit; 661 ifp->if_stop = if_nullstop; 662 ifp->if_watchdog = if_nullwatchdog; 663 ifp->if_drain = if_nulldrain; 664 665 /* No more packets may be enqueued. */ 666 ifp->if_snd.ifq_maxlen = 0; 667 668 splx(s); 669 } 670 671 void 672 if_purgeaddrs(struct ifnet *ifp, int family, void (*purgeaddr)(struct ifaddr *)) 673 { 674 struct ifaddr *ifa, *nifa; 675 676 for (ifa = IFADDR_FIRST(ifp); ifa != NULL; ifa = nifa) { 677 nifa = IFADDR_NEXT(ifa); 678 if (ifa->ifa_addr->sa_family != family) 679 continue; 680 (*purgeaddr)(ifa); 681 } 682 } 683 684 /* 685 * Detach an interface from the list of "active" interfaces, 686 * freeing any resources as we go along. 687 * 688 * NOTE: This routine must be called with a valid thread context, 689 * as it may block. 690 */ 691 void 692 if_detach(struct ifnet *ifp) 693 { 694 struct socket so; 695 struct ifaddr *ifa; 696 #ifdef IFAREF_DEBUG 697 struct ifaddr *last_ifa = NULL; 698 #endif 699 struct domain *dp; 700 const struct protosw *pr; 701 int s, i, family, purged; 702 703 /* 704 * XXX It's kind of lame that we have to have the 705 * XXX socket structure... 706 */ 707 memset(&so, 0, sizeof(so)); 708 709 s = splnet(); 710 711 /* 712 * Do an if_down() to give protocols a chance to do something. 713 */ 714 if_down(ifp); 715 716 #ifdef ALTQ 717 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 718 altq_disable(&ifp->if_snd); 719 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 720 altq_detach(&ifp->if_snd); 721 #endif 722 723 sysctl_teardown(&ifp->if_sysctl_log); 724 725 #if NCARP > 0 726 /* Remove the interface from any carp group it is a part of. */ 727 if (ifp->if_carp != NULL && ifp->if_type != IFT_CARP) 728 carp_ifdetach(ifp); 729 #endif 730 731 /* 732 * Rip all the addresses off the interface. This should make 733 * all of the routes go away. 734 * 735 * pr_usrreq calls can remove an arbitrary number of ifaddrs 736 * from the list, including our "cursor", ifa. For safety, 737 * and to honor the TAILQ abstraction, I just restart the 738 * loop after each removal. Note that the loop will exit 739 * when all of the remaining ifaddrs belong to the AF_LINK 740 * family. I am counting on the historical fact that at 741 * least one pr_usrreq in each address domain removes at 742 * least one ifaddr. 743 */ 744 again: 745 IFADDR_FOREACH(ifa, ifp) { 746 family = ifa->ifa_addr->sa_family; 747 #ifdef IFAREF_DEBUG 748 printf("if_detach: ifaddr %p, family %d, refcnt %d\n", 749 ifa, family, ifa->ifa_refcnt); 750 if (last_ifa != NULL && ifa == last_ifa) 751 panic("if_detach: loop detected"); 752 last_ifa = ifa; 753 #endif 754 if (family == AF_LINK) 755 continue; 756 dp = pffinddomain(family); 757 #ifdef DIAGNOSTIC 758 if (dp == NULL) 759 panic("if_detach: no domain for AF %d", 760 family); 761 #endif 762 /* 763 * XXX These PURGEIF calls are redundant with the 764 * purge-all-families calls below, but are left in for 765 * now both to make a smaller change, and to avoid 766 * unplanned interactions with clearing of 767 * ifp->if_addrlist. 768 */ 769 purged = 0; 770 for (pr = dp->dom_protosw; 771 pr < dp->dom_protoswNPROTOSW; pr++) { 772 so.so_proto = pr; 773 if (pr->pr_usrreq != NULL) { 774 (void) (*pr->pr_usrreq)(&so, 775 PRU_PURGEIF, NULL, NULL, 776 (struct mbuf *) ifp, curlwp); 777 purged = 1; 778 } 779 } 780 if (purged == 0) { 781 /* 782 * XXX What's really the best thing to do 783 * XXX here? --thorpej (at) NetBSD.org 784 */ 785 printf("if_detach: WARNING: AF %d not purged\n", 786 family); 787 ifa_remove(ifp, ifa); 788 } 789 goto again; 790 } 791 792 if_free_sadl(ifp); 793 794 /* Walk the routing table looking for stragglers. */ 795 for (i = 0; i <= AF_MAX; i++) 796 (void)rt_walktree(i, if_rt_walktree, ifp); 797 798 DOMAIN_FOREACH(dp) { 799 if (dp->dom_ifdetach != NULL && ifp->if_afdata[dp->dom_family]) 800 (*dp->dom_ifdetach)(ifp, 801 ifp->if_afdata[dp->dom_family]); 802 803 /* 804 * One would expect multicast memberships (INET and 805 * INET6) on UDP sockets to be purged by the PURGEIF 806 * calls above, but if all addresses were removed from 807 * the interface prior to destruction, the calls will 808 * not be made (e.g. ppp, for which pppd(8) generally 809 * removes addresses before destroying the interface). 810 * Because there is no invariant that multicast 811 * memberships only exist for interfaces with IPv4 812 * addresses, we must call PURGEIF regardless of 813 * addresses. (Protocols which might store ifnet 814 * pointers are marked with PR_PURGEIF.) 815 */ 816 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 817 so.so_proto = pr; 818 if (pr->pr_usrreq != NULL && pr->pr_flags & PR_PURGEIF) 819 (void)(*pr->pr_usrreq)(&so, PRU_PURGEIF, NULL, 820 NULL, (struct mbuf *)ifp, curlwp); 821 } 822 } 823 824 #ifdef PFIL_HOOKS 825 (void)pfil_run_hooks(&if_pfil, 826 (struct mbuf **)PFIL_IFNET_DETACH, ifp, PFIL_IFNET); 827 (void)pfil_head_unregister(&ifp->if_pfil); 828 #endif 829 830 /* Announce that the interface is gone. */ 831 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 832 833 ifindex2ifnet[ifp->if_index] = NULL; 834 835 TAILQ_REMOVE(&ifnet, ifp, if_list); 836 837 /* 838 * remove packets that came from ifp, from software interrupt queues. 839 */ 840 DOMAIN_FOREACH(dp) { 841 for (i = 0; i < __arraycount(dp->dom_ifqueues); i++) { 842 if (dp->dom_ifqueues[i] == NULL) 843 break; 844 if_detach_queues(ifp, dp->dom_ifqueues[i]); 845 } 846 } 847 848 splx(s); 849 } 850 851 static void 852 if_detach_queues(struct ifnet *ifp, struct ifqueue *q) 853 { 854 struct mbuf *m, *prev, *next; 855 856 prev = NULL; 857 for (m = q->ifq_head; m != NULL; m = next) { 858 next = m->m_nextpkt; 859 #ifdef DIAGNOSTIC 860 if ((m->m_flags & M_PKTHDR) == 0) { 861 prev = m; 862 continue; 863 } 864 #endif 865 if (m->m_pkthdr.rcvif != ifp) { 866 prev = m; 867 continue; 868 } 869 870 if (prev != NULL) 871 prev->m_nextpkt = m->m_nextpkt; 872 else 873 q->ifq_head = m->m_nextpkt; 874 if (q->ifq_tail == m) 875 q->ifq_tail = prev; 876 q->ifq_len--; 877 878 m->m_nextpkt = NULL; 879 m_freem(m); 880 IF_DROP(q); 881 } 882 } 883 884 /* 885 * Callback for a radix tree walk to delete all references to an 886 * ifnet. 887 */ 888 static int 889 if_rt_walktree(struct rtentry *rt, void *v) 890 { 891 struct ifnet *ifp = (struct ifnet *)v; 892 int error; 893 894 if (rt->rt_ifp != ifp) 895 return 0; 896 897 /* Delete the entry. */ 898 ++rt->rt_refcnt; 899 error = rtrequest(RTM_DELETE, rt_getkey(rt), rt->rt_gateway, 900 rt_mask(rt), rt->rt_flags, NULL); 901 KASSERT((rt->rt_flags & RTF_UP) == 0); 902 rt->rt_ifp = NULL; 903 RTFREE(rt); 904 if (error != 0) 905 printf("%s: warning: unable to delete rtentry @ %p, " 906 "error = %d\n", ifp->if_xname, rt, error); 907 return 0; 908 } 909 910 /* 911 * Create a clone network interface. 912 */ 913 int 914 if_clone_create(const char *name) 915 { 916 struct if_clone *ifc; 917 int unit; 918 919 ifc = if_clone_lookup(name, &unit); 920 if (ifc == NULL) 921 return EINVAL; 922 923 if (ifunit(name) != NULL) 924 return EEXIST; 925 926 return (*ifc->ifc_create)(ifc, unit); 927 } 928 929 /* 930 * Destroy a clone network interface. 931 */ 932 int 933 if_clone_destroy(const char *name) 934 { 935 struct if_clone *ifc; 936 struct ifnet *ifp; 937 938 ifc = if_clone_lookup(name, NULL); 939 if (ifc == NULL) 940 return EINVAL; 941 942 ifp = ifunit(name); 943 if (ifp == NULL) 944 return ENXIO; 945 946 if (ifc->ifc_destroy == NULL) 947 return EOPNOTSUPP; 948 949 return (*ifc->ifc_destroy)(ifp); 950 } 951 952 /* 953 * Look up a network interface cloner. 954 */ 955 static struct if_clone * 956 if_clone_lookup(const char *name, int *unitp) 957 { 958 struct if_clone *ifc; 959 const char *cp; 960 int unit; 961 962 /* separate interface name from unit */ 963 for (cp = name; 964 cp - name < IFNAMSIZ && *cp && (*cp < '0' || *cp > '9'); 965 cp++) 966 continue; 967 968 if (cp == name || cp - name == IFNAMSIZ || !*cp) 969 return NULL; /* No name or unit number */ 970 971 LIST_FOREACH(ifc, &if_cloners, ifc_list) { 972 if (strlen(ifc->ifc_name) == cp - name && 973 strncmp(name, ifc->ifc_name, cp - name) == 0) 974 break; 975 } 976 977 if (ifc == NULL) 978 return NULL; 979 980 unit = 0; 981 while (cp - name < IFNAMSIZ && *cp) { 982 if (*cp < '0' || *cp > '9' || unit > INT_MAX / 10) { 983 /* Bogus unit number. */ 984 return NULL; 985 } 986 unit = (unit * 10) + (*cp++ - '0'); 987 } 988 989 if (unitp != NULL) 990 *unitp = unit; 991 return ifc; 992 } 993 994 /* 995 * Register a network interface cloner. 996 */ 997 void 998 if_clone_attach(struct if_clone *ifc) 999 { 1000 1001 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list); 1002 if_cloners_count++; 1003 } 1004 1005 /* 1006 * Unregister a network interface cloner. 1007 */ 1008 void 1009 if_clone_detach(struct if_clone *ifc) 1010 { 1011 1012 LIST_REMOVE(ifc, ifc_list); 1013 if_cloners_count--; 1014 } 1015 1016 /* 1017 * Provide list of interface cloners to userspace. 1018 */ 1019 static int 1020 if_clone_list(struct if_clonereq *ifcr) 1021 { 1022 char outbuf[IFNAMSIZ], *dst; 1023 struct if_clone *ifc; 1024 int count, error = 0; 1025 1026 ifcr->ifcr_total = if_cloners_count; 1027 if ((dst = ifcr->ifcr_buffer) == NULL) { 1028 /* Just asking how many there are. */ 1029 return 0; 1030 } 1031 1032 if (ifcr->ifcr_count < 0) 1033 return EINVAL; 1034 1035 count = (if_cloners_count < ifcr->ifcr_count) ? 1036 if_cloners_count : ifcr->ifcr_count; 1037 1038 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0; 1039 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) { 1040 (void)strncpy(outbuf, ifc->ifc_name, sizeof(outbuf)); 1041 if (outbuf[sizeof(outbuf) - 1] != '\0') 1042 return ENAMETOOLONG; 1043 error = copyout(outbuf, dst, sizeof(outbuf)); 1044 if (error != 0) 1045 break; 1046 } 1047 1048 return error; 1049 } 1050 1051 void 1052 ifa_insert(struct ifnet *ifp, struct ifaddr *ifa) 1053 { 1054 ifa->ifa_ifp = ifp; 1055 TAILQ_INSERT_TAIL(&ifp->if_addrlist, ifa, ifa_list); 1056 IFAREF(ifa); 1057 } 1058 1059 void 1060 ifa_remove(struct ifnet *ifp, struct ifaddr *ifa) 1061 { 1062 KASSERT(ifa->ifa_ifp == ifp); 1063 TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list); 1064 IFAFREE(ifa); 1065 } 1066 1067 static inline int 1068 equal(const struct sockaddr *sa1, const struct sockaddr *sa2) 1069 { 1070 return sockaddr_cmp(sa1, sa2) == 0; 1071 } 1072 1073 /* 1074 * Locate an interface based on a complete address. 1075 */ 1076 /*ARGSUSED*/ 1077 struct ifaddr * 1078 ifa_ifwithaddr(const struct sockaddr *addr) 1079 { 1080 struct ifnet *ifp; 1081 struct ifaddr *ifa; 1082 1083 IFNET_FOREACH(ifp) { 1084 if (ifp->if_output == if_nulloutput) 1085 continue; 1086 IFADDR_FOREACH(ifa, ifp) { 1087 if (ifa->ifa_addr->sa_family != addr->sa_family) 1088 continue; 1089 if (equal(addr, ifa->ifa_addr)) 1090 return ifa; 1091 if ((ifp->if_flags & IFF_BROADCAST) && 1092 ifa->ifa_broadaddr && 1093 /* IP6 doesn't have broadcast */ 1094 ifa->ifa_broadaddr->sa_len != 0 && 1095 equal(ifa->ifa_broadaddr, addr)) 1096 return ifa; 1097 } 1098 } 1099 return NULL; 1100 } 1101 1102 /* 1103 * Locate the point to point interface with a given destination address. 1104 */ 1105 /*ARGSUSED*/ 1106 struct ifaddr * 1107 ifa_ifwithdstaddr(const struct sockaddr *addr) 1108 { 1109 struct ifnet *ifp; 1110 struct ifaddr *ifa; 1111 1112 IFNET_FOREACH(ifp) { 1113 if (ifp->if_output == if_nulloutput) 1114 continue; 1115 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1116 continue; 1117 IFADDR_FOREACH(ifa, ifp) { 1118 if (ifa->ifa_addr->sa_family != addr->sa_family || 1119 ifa->ifa_dstaddr == NULL) 1120 continue; 1121 if (equal(addr, ifa->ifa_dstaddr)) 1122 return ifa; 1123 } 1124 } 1125 return NULL; 1126 } 1127 1128 /* 1129 * Find an interface on a specific network. If many, choice 1130 * is most specific found. 1131 */ 1132 struct ifaddr * 1133 ifa_ifwithnet(const struct sockaddr *addr) 1134 { 1135 struct ifnet *ifp; 1136 struct ifaddr *ifa; 1137 const struct sockaddr_dl *sdl; 1138 struct ifaddr *ifa_maybe = 0; 1139 u_int af = addr->sa_family; 1140 const char *addr_data = addr->sa_data, *cplim; 1141 1142 if (af == AF_LINK) { 1143 sdl = satocsdl(addr); 1144 if (sdl->sdl_index && sdl->sdl_index < if_indexlim && 1145 ifindex2ifnet[sdl->sdl_index] && 1146 ifindex2ifnet[sdl->sdl_index]->if_output != if_nulloutput) 1147 return ifnet_addrs[sdl->sdl_index]; 1148 } 1149 #ifdef NETATALK 1150 if (af == AF_APPLETALK) { 1151 const struct sockaddr_at *sat, *sat2; 1152 sat = (const struct sockaddr_at *)addr; 1153 IFNET_FOREACH(ifp) { 1154 if (ifp->if_output == if_nulloutput) 1155 continue; 1156 ifa = at_ifawithnet((const struct sockaddr_at *)addr, ifp); 1157 if (ifa == NULL) 1158 continue; 1159 sat2 = (struct sockaddr_at *)ifa->ifa_addr; 1160 if (sat2->sat_addr.s_net == sat->sat_addr.s_net) 1161 return ifa; /* exact match */ 1162 if (ifa_maybe == NULL) { 1163 /* else keep the if with the right range */ 1164 ifa_maybe = ifa; 1165 } 1166 } 1167 return ifa_maybe; 1168 } 1169 #endif 1170 IFNET_FOREACH(ifp) { 1171 if (ifp->if_output == if_nulloutput) 1172 continue; 1173 IFADDR_FOREACH(ifa, ifp) { 1174 const char *cp, *cp2, *cp3; 1175 1176 if (ifa->ifa_addr->sa_family != af || 1177 ifa->ifa_netmask == NULL) 1178 next: continue; 1179 cp = addr_data; 1180 cp2 = ifa->ifa_addr->sa_data; 1181 cp3 = ifa->ifa_netmask->sa_data; 1182 cplim = (const char *)ifa->ifa_netmask + 1183 ifa->ifa_netmask->sa_len; 1184 while (cp3 < cplim) { 1185 if ((*cp++ ^ *cp2++) & *cp3++) { 1186 /* want to continue for() loop */ 1187 goto next; 1188 } 1189 } 1190 if (ifa_maybe == NULL || 1191 rn_refines((void *)ifa->ifa_netmask, 1192 (void *)ifa_maybe->ifa_netmask)) 1193 ifa_maybe = ifa; 1194 } 1195 } 1196 return ifa_maybe; 1197 } 1198 1199 /* 1200 * Find the interface of the addresss. 1201 */ 1202 struct ifaddr * 1203 ifa_ifwithladdr(const struct sockaddr *addr) 1204 { 1205 struct ifaddr *ia; 1206 1207 if ((ia = ifa_ifwithaddr(addr)) || (ia = ifa_ifwithdstaddr(addr)) || 1208 (ia = ifa_ifwithnet(addr))) 1209 return ia; 1210 return NULL; 1211 } 1212 1213 /* 1214 * Find an interface using a specific address family 1215 */ 1216 struct ifaddr * 1217 ifa_ifwithaf(int af) 1218 { 1219 struct ifnet *ifp; 1220 struct ifaddr *ifa; 1221 1222 IFNET_FOREACH(ifp) { 1223 if (ifp->if_output == if_nulloutput) 1224 continue; 1225 IFADDR_FOREACH(ifa, ifp) { 1226 if (ifa->ifa_addr->sa_family == af) 1227 return ifa; 1228 } 1229 } 1230 return NULL; 1231 } 1232 1233 /* 1234 * Find an interface address specific to an interface best matching 1235 * a given address. 1236 */ 1237 struct ifaddr * 1238 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp) 1239 { 1240 struct ifaddr *ifa; 1241 const char *cp, *cp2, *cp3; 1242 const char *cplim; 1243 struct ifaddr *ifa_maybe = 0; 1244 u_int af = addr->sa_family; 1245 1246 if (ifp->if_output == if_nulloutput) 1247 return NULL; 1248 1249 if (af >= AF_MAX) 1250 return NULL; 1251 1252 IFADDR_FOREACH(ifa, ifp) { 1253 if (ifa->ifa_addr->sa_family != af) 1254 continue; 1255 ifa_maybe = ifa; 1256 if (ifa->ifa_netmask == NULL) { 1257 if (equal(addr, ifa->ifa_addr) || 1258 (ifa->ifa_dstaddr && 1259 equal(addr, ifa->ifa_dstaddr))) 1260 return ifa; 1261 continue; 1262 } 1263 cp = addr->sa_data; 1264 cp2 = ifa->ifa_addr->sa_data; 1265 cp3 = ifa->ifa_netmask->sa_data; 1266 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1267 for (; cp3 < cplim; cp3++) { 1268 if ((*cp++ ^ *cp2++) & *cp3) 1269 break; 1270 } 1271 if (cp3 == cplim) 1272 return ifa; 1273 } 1274 return ifa_maybe; 1275 } 1276 1277 /* 1278 * Default action when installing a route with a Link Level gateway. 1279 * Lookup an appropriate real ifa to point to. 1280 * This should be moved to /sys/net/link.c eventually. 1281 */ 1282 void 1283 link_rtrequest(int cmd, struct rtentry *rt, const struct rt_addrinfo *info) 1284 { 1285 struct ifaddr *ifa; 1286 const struct sockaddr *dst; 1287 struct ifnet *ifp; 1288 1289 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL || 1290 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_getkey(rt)) == NULL) 1291 return; 1292 if ((ifa = ifaof_ifpforaddr(dst, ifp)) != NULL) { 1293 rt_replace_ifa(rt, ifa); 1294 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1295 ifa->ifa_rtrequest(cmd, rt, info); 1296 } 1297 } 1298 1299 /* 1300 * Handle a change in the interface link state. 1301 */ 1302 void 1303 if_link_state_change(struct ifnet *ifp, int link_state) 1304 { 1305 if (ifp->if_link_state == link_state) 1306 return; 1307 ifp->if_link_state = link_state; 1308 /* Notify that the link state has changed. */ 1309 rt_ifmsg(ifp); 1310 #if NCARP > 0 1311 if (ifp->if_carp) 1312 carp_carpdev_state(ifp); 1313 #endif 1314 } 1315 1316 /* 1317 * Mark an interface down and notify protocols of 1318 * the transition. 1319 * NOTE: must be called at splsoftnet or equivalent. 1320 */ 1321 void 1322 if_down(struct ifnet *ifp) 1323 { 1324 struct ifaddr *ifa; 1325 1326 ifp->if_flags &= ~IFF_UP; 1327 nanotime(&ifp->if_lastchange); 1328 IFADDR_FOREACH(ifa, ifp) 1329 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1330 IFQ_PURGE(&ifp->if_snd); 1331 #if NCARP > 0 1332 if (ifp->if_carp) 1333 carp_carpdev_state(ifp); 1334 #endif 1335 rt_ifmsg(ifp); 1336 } 1337 1338 /* 1339 * Mark an interface up and notify protocols of 1340 * the transition. 1341 * NOTE: must be called at splsoftnet or equivalent. 1342 */ 1343 void 1344 if_up(struct ifnet *ifp) 1345 { 1346 #ifdef notyet 1347 struct ifaddr *ifa; 1348 #endif 1349 1350 ifp->if_flags |= IFF_UP; 1351 nanotime(&ifp->if_lastchange); 1352 #ifdef notyet 1353 /* this has no effect on IP, and will kill all ISO connections XXX */ 1354 IFADDR_FOREACH(ifa, ifp) 1355 pfctlinput(PRC_IFUP, ifa->ifa_addr); 1356 #endif 1357 #if NCARP > 0 1358 if (ifp->if_carp) 1359 carp_carpdev_state(ifp); 1360 #endif 1361 rt_ifmsg(ifp); 1362 #ifdef INET6 1363 in6_if_up(ifp); 1364 #endif 1365 } 1366 1367 /* 1368 * Handle interface watchdog timer routines. Called 1369 * from softclock, we decrement timers (if set) and 1370 * call the appropriate interface routine on expiration. 1371 */ 1372 void 1373 if_slowtimo(void *arg) 1374 { 1375 struct ifnet *ifp; 1376 int s = splnet(); 1377 1378 IFNET_FOREACH(ifp) { 1379 if (ifp->if_timer == 0 || --ifp->if_timer) 1380 continue; 1381 if (ifp->if_watchdog != NULL) 1382 (*ifp->if_watchdog)(ifp); 1383 } 1384 splx(s); 1385 callout_reset(&if_slowtimo_ch, hz / IFNET_SLOWHZ, if_slowtimo, NULL); 1386 } 1387 1388 /* 1389 * Set/clear promiscuous mode on interface ifp based on the truth value 1390 * of pswitch. The calls are reference counted so that only the first 1391 * "on" request actually has an effect, as does the final "off" request. 1392 * Results are undefined if the "off" and "on" requests are not matched. 1393 */ 1394 int 1395 ifpromisc(struct ifnet *ifp, int pswitch) 1396 { 1397 int pcount, ret; 1398 short flags; 1399 struct ifreq ifr; 1400 1401 pcount = ifp->if_pcount; 1402 flags = ifp->if_flags; 1403 if (pswitch) { 1404 /* 1405 * Allow the device to be "placed" into promiscuous 1406 * mode even if it is not configured up. It will 1407 * consult IFF_PROMISC when it is is brought up. 1408 */ 1409 if (ifp->if_pcount++ != 0) 1410 return 0; 1411 ifp->if_flags |= IFF_PROMISC; 1412 if ((ifp->if_flags & IFF_UP) == 0) 1413 return 0; 1414 } else { 1415 if (--ifp->if_pcount > 0) 1416 return 0; 1417 ifp->if_flags &= ~IFF_PROMISC; 1418 /* 1419 * If the device is not configured up, we should not need to 1420 * turn off promiscuous mode (device should have turned it 1421 * off when interface went down; and will look at IFF_PROMISC 1422 * again next time interface comes up). 1423 */ 1424 if ((ifp->if_flags & IFF_UP) == 0) 1425 return 0; 1426 } 1427 memset(&ifr, 0, sizeof(ifr)); 1428 ifr.ifr_flags = ifp->if_flags; 1429 ret = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, &ifr); 1430 /* Restore interface state if not successful. */ 1431 if (ret != 0) { 1432 ifp->if_pcount = pcount; 1433 ifp->if_flags = flags; 1434 } 1435 return ret; 1436 } 1437 1438 /* 1439 * Map interface name to 1440 * interface structure pointer. 1441 */ 1442 struct ifnet * 1443 ifunit(const char *name) 1444 { 1445 struct ifnet *ifp; 1446 const char *cp = name; 1447 u_int unit = 0; 1448 u_int i; 1449 1450 /* 1451 * If the entire name is a number, treat it as an ifindex. 1452 */ 1453 for (i = 0; i < IFNAMSIZ && *cp >= '0' && *cp <= '9'; i++, cp++) { 1454 unit = unit * 10 + (*cp - '0'); 1455 } 1456 1457 /* 1458 * If the number took all of the name, then it's a valid ifindex. 1459 */ 1460 if (i == IFNAMSIZ || (cp != name && *cp == '\0')) { 1461 if (unit >= if_indexlim) 1462 return NULL; 1463 ifp = ifindex2ifnet[unit]; 1464 if (ifp == NULL || ifp->if_output == if_nulloutput) 1465 return NULL; 1466 return ifp; 1467 } 1468 1469 IFNET_FOREACH(ifp) { 1470 if (ifp->if_output == if_nulloutput) 1471 continue; 1472 if (strcmp(ifp->if_xname, name) == 0) 1473 return ifp; 1474 } 1475 return NULL; 1476 } 1477 1478 /* common */ 1479 int 1480 ifioctl_common(struct ifnet *ifp, u_long cmd, void *data) 1481 { 1482 int s; 1483 struct ifreq *ifr; 1484 struct ifcapreq *ifcr; 1485 struct ifdatareq *ifdr; 1486 1487 switch (cmd) { 1488 case SIOCSIFCAP: 1489 ifcr = data; 1490 if ((ifcr->ifcr_capenable & ~ifp->if_capabilities) != 0) 1491 return EINVAL; 1492 1493 if (ifcr->ifcr_capenable == ifp->if_capenable) 1494 return 0; 1495 1496 ifp->if_capenable = ifcr->ifcr_capenable; 1497 1498 /* Pre-compute the checksum flags mask. */ 1499 ifp->if_csum_flags_tx = 0; 1500 ifp->if_csum_flags_rx = 0; 1501 if (ifp->if_capenable & IFCAP_CSUM_IPv4_Tx) { 1502 ifp->if_csum_flags_tx |= M_CSUM_IPv4; 1503 } 1504 if (ifp->if_capenable & IFCAP_CSUM_IPv4_Rx) { 1505 ifp->if_csum_flags_rx |= M_CSUM_IPv4; 1506 } 1507 1508 if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Tx) { 1509 ifp->if_csum_flags_tx |= M_CSUM_TCPv4; 1510 } 1511 if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Rx) { 1512 ifp->if_csum_flags_rx |= M_CSUM_TCPv4; 1513 } 1514 1515 if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Tx) { 1516 ifp->if_csum_flags_tx |= M_CSUM_UDPv4; 1517 } 1518 if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Rx) { 1519 ifp->if_csum_flags_rx |= M_CSUM_UDPv4; 1520 } 1521 1522 if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Tx) { 1523 ifp->if_csum_flags_tx |= M_CSUM_TCPv6; 1524 } 1525 if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Rx) { 1526 ifp->if_csum_flags_rx |= M_CSUM_TCPv6; 1527 } 1528 1529 if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Tx) { 1530 ifp->if_csum_flags_tx |= M_CSUM_UDPv6; 1531 } 1532 if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Rx) { 1533 ifp->if_csum_flags_rx |= M_CSUM_UDPv6; 1534 } 1535 if (ifp->if_flags & IFF_UP) 1536 return ENETRESET; 1537 return 0; 1538 case SIOCSIFFLAGS: 1539 ifr = data; 1540 if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) { 1541 s = splnet(); 1542 if_down(ifp); 1543 splx(s); 1544 } 1545 if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) { 1546 s = splnet(); 1547 if_up(ifp); 1548 splx(s); 1549 } 1550 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 1551 (ifr->ifr_flags &~ IFF_CANTCHANGE); 1552 break; 1553 case SIOCGIFFLAGS: 1554 ifr = data; 1555 ifr->ifr_flags = ifp->if_flags; 1556 break; 1557 1558 case SIOCGIFMETRIC: 1559 ifr = data; 1560 ifr->ifr_metric = ifp->if_metric; 1561 break; 1562 1563 case SIOCGIFMTU: 1564 ifr = data; 1565 ifr->ifr_mtu = ifp->if_mtu; 1566 break; 1567 1568 case SIOCGIFDLT: 1569 ifr = data; 1570 ifr->ifr_dlt = ifp->if_dlt; 1571 break; 1572 1573 case SIOCGIFCAP: 1574 ifcr = data; 1575 ifcr->ifcr_capabilities = ifp->if_capabilities; 1576 ifcr->ifcr_capenable = ifp->if_capenable; 1577 break; 1578 1579 case SIOCSIFMETRIC: 1580 ifr = data; 1581 ifp->if_metric = ifr->ifr_metric; 1582 break; 1583 1584 case SIOCGIFDATA: 1585 ifdr = data; 1586 ifdr->ifdr_data = ifp->if_data; 1587 break; 1588 1589 case SIOCZIFDATA: 1590 ifdr = data; 1591 ifdr->ifdr_data = ifp->if_data; 1592 /* 1593 * Assumes that the volatile counters that can be 1594 * zero'ed are at the end of if_data. 1595 */ 1596 memset(&ifp->if_data.ifi_ipackets, 0, sizeof(ifp->if_data) - 1597 offsetof(struct if_data, ifi_ipackets)); 1598 break; 1599 case SIOCSIFMTU: 1600 ifr = data; 1601 if (ifp->if_mtu == ifr->ifr_mtu) 1602 break; 1603 ifp->if_mtu = ifr->ifr_mtu; 1604 /* 1605 * If the link MTU changed, do network layer specific procedure. 1606 */ 1607 #ifdef INET6 1608 nd6_setmtu(ifp); 1609 #endif 1610 return ENETRESET; 1611 default: 1612 return ENOTTY; 1613 } 1614 return 0; 1615 } 1616 1617 int 1618 ifaddrpref_ioctl(struct socket *so, u_long cmd, void *data, struct ifnet *ifp, 1619 lwp_t *l) 1620 { 1621 struct if_addrprefreq *ifap = (struct if_addrprefreq *)data; 1622 struct ifaddr *ifa; 1623 const struct sockaddr *any, *sa; 1624 union { 1625 struct sockaddr sa; 1626 struct sockaddr_storage ss; 1627 } u, v; 1628 1629 switch (cmd) { 1630 case SIOCSIFADDRPREF: 1631 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_INTERFACE, 1632 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1633 NULL) != 0) 1634 return EPERM; 1635 case SIOCGIFADDRPREF: 1636 break; 1637 default: 1638 return EOPNOTSUPP; 1639 } 1640 1641 /* sanity checks */ 1642 if (data == NULL || ifp == NULL) { 1643 panic("invalid argument to %s", __func__); 1644 /*NOTREACHED*/ 1645 } 1646 1647 /* address must be specified on ADD and DELETE */ 1648 sa = sstocsa(&ifap->ifap_addr); 1649 if (sa->sa_family != sofamily(so)) 1650 return EINVAL; 1651 if ((any = sockaddr_any(sa)) == NULL || sa->sa_len != any->sa_len) 1652 return EINVAL; 1653 1654 sockaddr_externalize(&v.sa, sizeof(v.ss), sa); 1655 1656 IFADDR_FOREACH(ifa, ifp) { 1657 if (ifa->ifa_addr->sa_family != sa->sa_family) 1658 continue; 1659 sockaddr_externalize(&u.sa, sizeof(u.ss), ifa->ifa_addr); 1660 if (sockaddr_cmp(&u.sa, &v.sa) == 0) 1661 break; 1662 } 1663 if (ifa == NULL) 1664 return EADDRNOTAVAIL; 1665 1666 switch (cmd) { 1667 case SIOCSIFADDRPREF: 1668 ifa->ifa_preference = ifap->ifap_preference; 1669 return 0; 1670 case SIOCGIFADDRPREF: 1671 /* fill in the if_laddrreq structure */ 1672 (void)sockaddr_copy(sstosa(&ifap->ifap_addr), 1673 sizeof(ifap->ifap_addr), ifa->ifa_addr); 1674 ifap->ifap_preference = ifa->ifa_preference; 1675 return 0; 1676 default: 1677 return EOPNOTSUPP; 1678 } 1679 } 1680 1681 /* 1682 * Interface ioctls. 1683 */ 1684 int 1685 ifioctl(struct socket *so, u_long cmd, void *data, struct lwp *l) 1686 { 1687 struct ifnet *ifp; 1688 struct ifreq *ifr; 1689 struct ifcapreq *ifcr; 1690 struct ifdatareq *ifdr; 1691 int error = 0; 1692 #if defined(COMPAT_OSOCK) || defined(COMPAT_OIFREQ) 1693 u_long ocmd = cmd; 1694 #endif 1695 short oif_flags; 1696 #ifdef COMPAT_OIFREQ 1697 struct ifreq ifrb; 1698 struct oifreq *oifr = NULL; 1699 #endif 1700 1701 switch (cmd) { 1702 #ifdef COMPAT_OIFREQ 1703 case OSIOCGIFCONF: 1704 case OOSIOCGIFCONF: 1705 return compat_ifconf(cmd, data); 1706 #endif 1707 #ifdef COMPAT_OIFDATA 1708 case OSIOCGIFDATA: 1709 case OSIOCZIFDATA: 1710 return compat_ifdatareq(l, cmd, data); 1711 #endif 1712 case SIOCGIFCONF: 1713 return ifconf(cmd, data); 1714 case SIOCINITIFADDR: 1715 return EPERM; 1716 } 1717 1718 #ifdef COMPAT_OIFREQ 1719 cmd = compat_cvtcmd(cmd); 1720 if (cmd != ocmd) { 1721 oifr = data; 1722 data = ifr = &ifrb; 1723 ifreqo2n(oifr, ifr); 1724 } else 1725 #endif 1726 ifr = data; 1727 ifcr = data; 1728 ifdr = data; 1729 1730 ifp = ifunit(ifr->ifr_name); 1731 1732 switch (cmd) { 1733 case SIOCIFCREATE: 1734 case SIOCIFDESTROY: 1735 if (l != NULL) { 1736 error = kauth_authorize_network(l->l_cred, 1737 KAUTH_NETWORK_INTERFACE, 1738 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, 1739 (void *)cmd, NULL); 1740 if (error != 0) 1741 return error; 1742 } 1743 return (cmd == SIOCIFCREATE) ? 1744 if_clone_create(ifr->ifr_name) : 1745 if_clone_destroy(ifr->ifr_name); 1746 1747 case SIOCIFGCLONERS: 1748 return if_clone_list((struct if_clonereq *)data); 1749 } 1750 1751 if (ifp == NULL) 1752 return ENXIO; 1753 1754 switch (cmd) { 1755 case SIOCALIFADDR: 1756 case SIOCDLIFADDR: 1757 case SIOCSIFADDRPREF: 1758 case SIOCSIFFLAGS: 1759 case SIOCSIFCAP: 1760 case SIOCSIFMETRIC: 1761 case SIOCZIFDATA: 1762 case SIOCSIFMTU: 1763 case SIOCSIFPHYADDR: 1764 case SIOCDIFPHYADDR: 1765 #ifdef INET6 1766 case SIOCSIFPHYADDR_IN6: 1767 #endif 1768 case SIOCSLIFPHYADDR: 1769 case SIOCADDMULTI: 1770 case SIOCDELMULTI: 1771 case SIOCSIFMEDIA: 1772 case SIOCSDRVSPEC: 1773 case SIOCG80211: 1774 case SIOCS80211: 1775 case SIOCS80211NWID: 1776 case SIOCS80211NWKEY: 1777 case SIOCS80211POWER: 1778 case SIOCS80211BSSID: 1779 case SIOCS80211CHANNEL: 1780 if (l != NULL) { 1781 error = kauth_authorize_network(l->l_cred, 1782 KAUTH_NETWORK_INTERFACE, 1783 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, 1784 (void *)cmd, NULL); 1785 if (error != 0) 1786 return error; 1787 } 1788 } 1789 1790 oif_flags = ifp->if_flags; 1791 1792 error = (*ifp->if_ioctl)(ifp, cmd, data); 1793 if (error != ENOTTY) 1794 ; 1795 else if (so->so_proto == NULL) 1796 return EOPNOTSUPP; 1797 else { 1798 #ifdef COMPAT_OSOCK 1799 error = compat_ifioctl(so, ocmd, cmd, data, l); 1800 #else 1801 error = (*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 1802 (struct mbuf *)cmd, (struct mbuf *)data, 1803 (struct mbuf *)ifp, l); 1804 #endif 1805 } 1806 1807 if (((oif_flags ^ ifp->if_flags) & IFF_UP) != 0) { 1808 #ifdef INET6 1809 if ((ifp->if_flags & IFF_UP) != 0) { 1810 int s = splnet(); 1811 in6_if_up(ifp); 1812 splx(s); 1813 } 1814 #endif 1815 } 1816 #ifdef COMPAT_OIFREQ 1817 if (cmd != ocmd) 1818 ifreqn2o(oifr, ifr); 1819 #endif 1820 1821 return error; 1822 } 1823 1824 /* 1825 * Return interface configuration 1826 * of system. List may be used 1827 * in later ioctl's (above) to get 1828 * other information. 1829 * 1830 * Each record is a struct ifreq. Before the addition of 1831 * sockaddr_storage, the API rule was that sockaddr flavors that did 1832 * not fit would extend beyond the struct ifreq, with the next struct 1833 * ifreq starting sa_len beyond the struct sockaddr. Because the 1834 * union in struct ifreq includes struct sockaddr_storage, every kind 1835 * of sockaddr must fit. Thus, there are no longer any overlength 1836 * records. 1837 * 1838 * Records are added to the user buffer if they fit, and ifc_len is 1839 * adjusted to the length that was written. Thus, the user is only 1840 * assured of getting the complete list if ifc_len on return is at 1841 * least sizeof(struct ifreq) less than it was on entry. 1842 * 1843 * If the user buffer pointer is NULL, this routine copies no data and 1844 * returns the amount of space that would be needed. 1845 * 1846 * Invariants: 1847 * ifrp points to the next part of the user's buffer to be used. If 1848 * ifrp != NULL, space holds the number of bytes remaining that we may 1849 * write at ifrp. Otherwise, space holds the number of bytes that 1850 * would have been written had there been adequate space. 1851 */ 1852 /*ARGSUSED*/ 1853 int 1854 ifconf(u_long cmd, void *data) 1855 { 1856 struct ifconf *ifc = (struct ifconf *)data; 1857 struct ifnet *ifp; 1858 struct ifaddr *ifa; 1859 struct ifreq ifr, *ifrp; 1860 int space, error = 0; 1861 const int sz = (int)sizeof(struct ifreq); 1862 1863 if ((ifrp = ifc->ifc_req) == NULL) 1864 space = 0; 1865 else 1866 space = ifc->ifc_len; 1867 IFNET_FOREACH(ifp) { 1868 (void)strncpy(ifr.ifr_name, ifp->if_xname, 1869 sizeof(ifr.ifr_name)); 1870 if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0') 1871 return ENAMETOOLONG; 1872 if (IFADDR_EMPTY(ifp)) { 1873 /* Interface with no addresses - send zero sockaddr. */ 1874 memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr)); 1875 if (ifrp == NULL) { 1876 space += sz; 1877 continue; 1878 } 1879 if (space >= sz) { 1880 error = copyout(&ifr, ifrp, sz); 1881 if (error != 0) 1882 return error; 1883 ifrp++; 1884 space -= sz; 1885 } 1886 } 1887 1888 IFADDR_FOREACH(ifa, ifp) { 1889 struct sockaddr *sa = ifa->ifa_addr; 1890 /* all sockaddrs must fit in sockaddr_storage */ 1891 KASSERT(sa->sa_len <= sizeof(ifr.ifr_ifru)); 1892 1893 if (ifrp == NULL) { 1894 space += sz; 1895 continue; 1896 } 1897 memcpy(&ifr.ifr_space, sa, sa->sa_len); 1898 if (space >= sz) { 1899 error = copyout(&ifr, ifrp, sz); 1900 if (error != 0) 1901 return (error); 1902 ifrp++; space -= sz; 1903 } 1904 } 1905 } 1906 if (ifrp != NULL) { 1907 KASSERT(0 <= space && space <= ifc->ifc_len); 1908 ifc->ifc_len -= space; 1909 } else { 1910 KASSERT(space >= 0); 1911 ifc->ifc_len = space; 1912 } 1913 return (0); 1914 } 1915 1916 int 1917 ifreq_setaddr(const u_long cmd, struct ifreq *ifr, const struct sockaddr *sa) 1918 { 1919 uint8_t len; 1920 u_long ncmd; 1921 1922 if ((ncmd = compat_cvtcmd(cmd)) != cmd) 1923 len = sizeof(ifr->ifr_addr); 1924 else 1925 len = sizeof(ifr->ifr_ifru.ifru_space); 1926 if (len < sa->sa_len) 1927 return EFBIG; 1928 memset(&ifr->ifr_addr, 0, len); 1929 sockaddr_copy(&ifr->ifr_addr, len, sa); 1930 return 0; 1931 } 1932 1933 /* 1934 * Queue message on interface, and start output if interface 1935 * not yet active. 1936 */ 1937 int 1938 ifq_enqueue(struct ifnet *ifp, struct mbuf *m 1939 ALTQ_COMMA ALTQ_DECL(struct altq_pktattr *pktattr)) 1940 { 1941 int len = m->m_pkthdr.len; 1942 int mflags = m->m_flags; 1943 int s = splnet(); 1944 int error; 1945 1946 IFQ_ENQUEUE(&ifp->if_snd, m, pktattr, error); 1947 if (error != 0) 1948 goto out; 1949 ifp->if_obytes += len; 1950 if (mflags & M_MCAST) 1951 ifp->if_omcasts++; 1952 if ((ifp->if_flags & IFF_OACTIVE) == 0) 1953 (*ifp->if_start)(ifp); 1954 out: 1955 splx(s); 1956 return error; 1957 } 1958 1959 /* 1960 * Queue message on interface, possibly using a second fast queue 1961 */ 1962 int 1963 ifq_enqueue2(struct ifnet *ifp, struct ifqueue *ifq, struct mbuf *m 1964 ALTQ_COMMA ALTQ_DECL(struct altq_pktattr *pktattr)) 1965 { 1966 int error = 0; 1967 1968 if (ifq != NULL 1969 #ifdef ALTQ 1970 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 1971 #endif 1972 ) { 1973 if (IF_QFULL(ifq)) { 1974 IF_DROP(&ifp->if_snd); 1975 m_freem(m); 1976 if (error == 0) 1977 error = ENOBUFS; 1978 } else 1979 IF_ENQUEUE(ifq, m); 1980 } else 1981 IFQ_ENQUEUE(&ifp->if_snd, m, pktattr, error); 1982 if (error != 0) { 1983 ++ifp->if_oerrors; 1984 return error; 1985 } 1986 return 0; 1987 } 1988 1989 1990 static void 1991 sysctl_sndq_setup(struct sysctllog **clog, const char *ifname, 1992 struct ifaltq *ifq) 1993 { 1994 const struct sysctlnode *cnode, *rnode; 1995 1996 if (sysctl_createv(clog, 0, NULL, &rnode, 1997 CTLFLAG_PERMANENT, 1998 CTLTYPE_NODE, "net", NULL, 1999 NULL, 0, NULL, 0, 2000 CTL_NET, CTL_EOL) != 0) 2001 goto bad; 2002 2003 if (sysctl_createv(clog, 0, &rnode, &rnode, 2004 CTLFLAG_PERMANENT, 2005 CTLTYPE_NODE, "interfaces", 2006 SYSCTL_DESCR("Per-interface controls"), 2007 NULL, 0, NULL, 0, 2008 CTL_CREATE, CTL_EOL) != 0) 2009 goto bad; 2010 2011 if (sysctl_createv(clog, 0, &rnode, &rnode, 2012 CTLFLAG_PERMANENT, 2013 CTLTYPE_NODE, ifname, 2014 SYSCTL_DESCR("Interface controls"), 2015 NULL, 0, NULL, 0, 2016 CTL_CREATE, CTL_EOL) != 0) 2017 goto bad; 2018 2019 if (sysctl_createv(clog, 0, &rnode, &rnode, 2020 CTLFLAG_PERMANENT, 2021 CTLTYPE_NODE, "sndq", 2022 SYSCTL_DESCR("Interface output queue controls"), 2023 NULL, 0, NULL, 0, 2024 CTL_CREATE, CTL_EOL) != 0) 2025 goto bad; 2026 2027 if (sysctl_createv(clog, 0, &rnode, &cnode, 2028 CTLFLAG_PERMANENT, 2029 CTLTYPE_INT, "len", 2030 SYSCTL_DESCR("Current output queue length"), 2031 NULL, 0, &ifq->ifq_len, 0, 2032 CTL_CREATE, CTL_EOL) != 0) 2033 goto bad; 2034 2035 if (sysctl_createv(clog, 0, &rnode, &cnode, 2036 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2037 CTLTYPE_INT, "maxlen", 2038 SYSCTL_DESCR("Maximum allowed output queue length"), 2039 NULL, 0, &ifq->ifq_maxlen, 0, 2040 CTL_CREATE, CTL_EOL) != 0) 2041 goto bad; 2042 2043 if (sysctl_createv(clog, 0, &rnode, &cnode, 2044 CTLFLAG_PERMANENT, 2045 CTLTYPE_INT, "drops", 2046 SYSCTL_DESCR("Packets dropped due to full output queue"), 2047 NULL, 0, &ifq->ifq_drops, 0, 2048 CTL_CREATE, CTL_EOL) != 0) 2049 goto bad; 2050 2051 return; 2052 bad: 2053 printf("%s: could not attach sysctl nodes\n", ifname); 2054 return; 2055 } 2056 2057 #if defined(INET) || defined(INET6) 2058 static void 2059 sysctl_net_ifq_setup(struct sysctllog **clog, 2060 int pf, const char *pfname, 2061 int ipn, const char *ipname, 2062 int qid, struct ifqueue *ifq) 2063 { 2064 2065 sysctl_createv(clog, 0, NULL, NULL, 2066 CTLFLAG_PERMANENT, 2067 CTLTYPE_NODE, "net", NULL, 2068 NULL, 0, NULL, 0, 2069 CTL_NET, CTL_EOL); 2070 sysctl_createv(clog, 0, NULL, NULL, 2071 CTLFLAG_PERMANENT, 2072 CTLTYPE_NODE, pfname, NULL, 2073 NULL, 0, NULL, 0, 2074 CTL_NET, pf, CTL_EOL); 2075 sysctl_createv(clog, 0, NULL, NULL, 2076 CTLFLAG_PERMANENT, 2077 CTLTYPE_NODE, ipname, NULL, 2078 NULL, 0, NULL, 0, 2079 CTL_NET, pf, ipn, CTL_EOL); 2080 sysctl_createv(clog, 0, NULL, NULL, 2081 CTLFLAG_PERMANENT, 2082 CTLTYPE_NODE, "ifq", 2083 SYSCTL_DESCR("Protocol input queue controls"), 2084 NULL, 0, NULL, 0, 2085 CTL_NET, pf, ipn, qid, CTL_EOL); 2086 2087 sysctl_createv(clog, 0, NULL, NULL, 2088 CTLFLAG_PERMANENT, 2089 CTLTYPE_INT, "len", 2090 SYSCTL_DESCR("Current input queue length"), 2091 NULL, 0, &ifq->ifq_len, 0, 2092 CTL_NET, pf, ipn, qid, IFQCTL_LEN, CTL_EOL); 2093 sysctl_createv(clog, 0, NULL, NULL, 2094 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2095 CTLTYPE_INT, "maxlen", 2096 SYSCTL_DESCR("Maximum allowed input queue length"), 2097 NULL, 0, &ifq->ifq_maxlen, 0, 2098 CTL_NET, pf, ipn, qid, IFQCTL_MAXLEN, CTL_EOL); 2099 #ifdef notyet 2100 sysctl_createv(clog, 0, NULL, NULL, 2101 CTLFLAG_PERMANENT, 2102 CTLTYPE_INT, "peak", 2103 SYSCTL_DESCR("Highest input queue length"), 2104 NULL, 0, &ifq->ifq_peak, 0, 2105 CTL_NET, pf, ipn, qid, IFQCTL_PEAK, CTL_EOL); 2106 #endif 2107 sysctl_createv(clog, 0, NULL, NULL, 2108 CTLFLAG_PERMANENT, 2109 CTLTYPE_INT, "drops", 2110 SYSCTL_DESCR("Packets dropped due to full input queue"), 2111 NULL, 0, &ifq->ifq_drops, 0, 2112 CTL_NET, pf, ipn, qid, IFQCTL_DROPS, CTL_EOL); 2113 } 2114 #endif /* INET || INET6 */ 2115
Indexes created Mon Sep 22 13:09:51 GMT 2025