if.c revision 1.249
1 /* $NetBSD: if.c,v 1.249 2010/11/15 22:42:36 pooka 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 1.249 2010/11/15 22:42:36 pooka 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 while (rt_walktree(i, if_rt_walktree, ifp) == ERESTART) 797 ; 798 } 799 800 DOMAIN_FOREACH(dp) { 801 if (dp->dom_ifdetach != NULL && ifp->if_afdata[dp->dom_family]) 802 (*dp->dom_ifdetach)(ifp, 803 ifp->if_afdata[dp->dom_family]); 804 805 /* 806 * One would expect multicast memberships (INET and 807 * INET6) on UDP sockets to be purged by the PURGEIF 808 * calls above, but if all addresses were removed from 809 * the interface prior to destruction, the calls will 810 * not be made (e.g. ppp, for which pppd(8) generally 811 * removes addresses before destroying the interface). 812 * Because there is no invariant that multicast 813 * memberships only exist for interfaces with IPv4 814 * addresses, we must call PURGEIF regardless of 815 * addresses. (Protocols which might store ifnet 816 * pointers are marked with PR_PURGEIF.) 817 */ 818 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 819 so.so_proto = pr; 820 if (pr->pr_usrreq != NULL && pr->pr_flags & PR_PURGEIF) 821 (void)(*pr->pr_usrreq)(&so, PRU_PURGEIF, NULL, 822 NULL, (struct mbuf *)ifp, curlwp); 823 } 824 } 825 826 #ifdef PFIL_HOOKS 827 (void)pfil_run_hooks(&if_pfil, 828 (struct mbuf **)PFIL_IFNET_DETACH, ifp, PFIL_IFNET); 829 (void)pfil_head_unregister(&ifp->if_pfil); 830 #endif 831 832 /* Announce that the interface is gone. */ 833 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 834 835 ifindex2ifnet[ifp->if_index] = NULL; 836 837 TAILQ_REMOVE(&ifnet, ifp, if_list); 838 839 /* 840 * remove packets that came from ifp, from software interrupt queues. 841 */ 842 DOMAIN_FOREACH(dp) { 843 for (i = 0; i < __arraycount(dp->dom_ifqueues); i++) { 844 if (dp->dom_ifqueues[i] == NULL) 845 break; 846 if_detach_queues(ifp, dp->dom_ifqueues[i]); 847 } 848 } 849 850 splx(s); 851 } 852 853 static void 854 if_detach_queues(struct ifnet *ifp, struct ifqueue *q) 855 { 856 struct mbuf *m, *prev, *next; 857 858 prev = NULL; 859 for (m = q->ifq_head; m != NULL; m = next) { 860 next = m->m_nextpkt; 861 #ifdef DIAGNOSTIC 862 if ((m->m_flags & M_PKTHDR) == 0) { 863 prev = m; 864 continue; 865 } 866 #endif 867 if (m->m_pkthdr.rcvif != ifp) { 868 prev = m; 869 continue; 870 } 871 872 if (prev != NULL) 873 prev->m_nextpkt = m->m_nextpkt; 874 else 875 q->ifq_head = m->m_nextpkt; 876 if (q->ifq_tail == m) 877 q->ifq_tail = prev; 878 q->ifq_len--; 879 880 m->m_nextpkt = NULL; 881 m_freem(m); 882 IF_DROP(q); 883 } 884 } 885 886 /* 887 * Callback for a radix tree walk to delete all references to an 888 * ifnet. 889 */ 890 static int 891 if_rt_walktree(struct rtentry *rt, void *v) 892 { 893 struct ifnet *ifp = (struct ifnet *)v; 894 int error; 895 896 if (rt->rt_ifp != ifp) 897 return 0; 898 899 /* Delete the entry. */ 900 ++rt->rt_refcnt; 901 error = rtrequest(RTM_DELETE, rt_getkey(rt), rt->rt_gateway, 902 rt_mask(rt), rt->rt_flags, NULL); 903 KASSERT((rt->rt_flags & RTF_UP) == 0); 904 rt->rt_ifp = NULL; 905 RTFREE(rt); 906 if (error != 0) 907 printf("%s: warning: unable to delete rtentry @ %p, " 908 "error = %d\n", ifp->if_xname, rt, error); 909 return ERESTART; 910 } 911 912 /* 913 * Create a clone network interface. 914 */ 915 int 916 if_clone_create(const char *name) 917 { 918 struct if_clone *ifc; 919 int unit; 920 921 ifc = if_clone_lookup(name, &unit); 922 if (ifc == NULL) 923 return EINVAL; 924 925 if (ifunit(name) != NULL) 926 return EEXIST; 927 928 return (*ifc->ifc_create)(ifc, unit); 929 } 930 931 /* 932 * Destroy a clone network interface. 933 */ 934 int 935 if_clone_destroy(const char *name) 936 { 937 struct if_clone *ifc; 938 struct ifnet *ifp; 939 940 ifc = if_clone_lookup(name, NULL); 941 if (ifc == NULL) 942 return EINVAL; 943 944 ifp = ifunit(name); 945 if (ifp == NULL) 946 return ENXIO; 947 948 if (ifc->ifc_destroy == NULL) 949 return EOPNOTSUPP; 950 951 return (*ifc->ifc_destroy)(ifp); 952 } 953 954 /* 955 * Look up a network interface cloner. 956 */ 957 static struct if_clone * 958 if_clone_lookup(const char *name, int *unitp) 959 { 960 struct if_clone *ifc; 961 const char *cp; 962 int unit; 963 964 /* separate interface name from unit */ 965 for (cp = name; 966 cp - name < IFNAMSIZ && *cp && (*cp < '0' || *cp > '9'); 967 cp++) 968 continue; 969 970 if (cp == name || cp - name == IFNAMSIZ || !*cp) 971 return NULL; /* No name or unit number */ 972 973 LIST_FOREACH(ifc, &if_cloners, ifc_list) { 974 if (strlen(ifc->ifc_name) == cp - name && 975 strncmp(name, ifc->ifc_name, cp - name) == 0) 976 break; 977 } 978 979 if (ifc == NULL) 980 return NULL; 981 982 unit = 0; 983 while (cp - name < IFNAMSIZ && *cp) { 984 if (*cp < '0' || *cp > '9' || unit >= INT_MAX / 10) { 985 /* Bogus unit number. */ 986 return NULL; 987 } 988 unit = (unit * 10) + (*cp++ - '0'); 989 } 990 991 if (unitp != NULL) 992 *unitp = unit; 993 return ifc; 994 } 995 996 /* 997 * Register a network interface cloner. 998 */ 999 void 1000 if_clone_attach(struct if_clone *ifc) 1001 { 1002 1003 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list); 1004 if_cloners_count++; 1005 } 1006 1007 /* 1008 * Unregister a network interface cloner. 1009 */ 1010 void 1011 if_clone_detach(struct if_clone *ifc) 1012 { 1013 1014 LIST_REMOVE(ifc, ifc_list); 1015 if_cloners_count--; 1016 } 1017 1018 /* 1019 * Provide list of interface cloners to userspace. 1020 */ 1021 static int 1022 if_clone_list(struct if_clonereq *ifcr) 1023 { 1024 char outbuf[IFNAMSIZ], *dst; 1025 struct if_clone *ifc; 1026 int count, error = 0; 1027 1028 ifcr->ifcr_total = if_cloners_count; 1029 if ((dst = ifcr->ifcr_buffer) == NULL) { 1030 /* Just asking how many there are. */ 1031 return 0; 1032 } 1033 1034 if (ifcr->ifcr_count < 0) 1035 return EINVAL; 1036 1037 count = (if_cloners_count < ifcr->ifcr_count) ? 1038 if_cloners_count : ifcr->ifcr_count; 1039 1040 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0; 1041 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) { 1042 (void)strncpy(outbuf, ifc->ifc_name, sizeof(outbuf)); 1043 if (outbuf[sizeof(outbuf) - 1] != '\0') 1044 return ENAMETOOLONG; 1045 error = copyout(outbuf, dst, sizeof(outbuf)); 1046 if (error != 0) 1047 break; 1048 } 1049 1050 return error; 1051 } 1052 1053 void 1054 ifa_insert(struct ifnet *ifp, struct ifaddr *ifa) 1055 { 1056 ifa->ifa_ifp = ifp; 1057 TAILQ_INSERT_TAIL(&ifp->if_addrlist, ifa, ifa_list); 1058 IFAREF(ifa); 1059 } 1060 1061 void 1062 ifa_remove(struct ifnet *ifp, struct ifaddr *ifa) 1063 { 1064 KASSERT(ifa->ifa_ifp == ifp); 1065 TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list); 1066 IFAFREE(ifa); 1067 } 1068 1069 static inline int 1070 equal(const struct sockaddr *sa1, const struct sockaddr *sa2) 1071 { 1072 return sockaddr_cmp(sa1, sa2) == 0; 1073 } 1074 1075 /* 1076 * Locate an interface based on a complete address. 1077 */ 1078 /*ARGSUSED*/ 1079 struct ifaddr * 1080 ifa_ifwithaddr(const struct sockaddr *addr) 1081 { 1082 struct ifnet *ifp; 1083 struct ifaddr *ifa; 1084 1085 IFNET_FOREACH(ifp) { 1086 if (ifp->if_output == if_nulloutput) 1087 continue; 1088 IFADDR_FOREACH(ifa, ifp) { 1089 if (ifa->ifa_addr->sa_family != addr->sa_family) 1090 continue; 1091 if (equal(addr, ifa->ifa_addr)) 1092 return ifa; 1093 if ((ifp->if_flags & IFF_BROADCAST) && 1094 ifa->ifa_broadaddr && 1095 /* IP6 doesn't have broadcast */ 1096 ifa->ifa_broadaddr->sa_len != 0 && 1097 equal(ifa->ifa_broadaddr, addr)) 1098 return ifa; 1099 } 1100 } 1101 return NULL; 1102 } 1103 1104 /* 1105 * Locate the point to point interface with a given destination address. 1106 */ 1107 /*ARGSUSED*/ 1108 struct ifaddr * 1109 ifa_ifwithdstaddr(const struct sockaddr *addr) 1110 { 1111 struct ifnet *ifp; 1112 struct ifaddr *ifa; 1113 1114 IFNET_FOREACH(ifp) { 1115 if (ifp->if_output == if_nulloutput) 1116 continue; 1117 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1118 continue; 1119 IFADDR_FOREACH(ifa, ifp) { 1120 if (ifa->ifa_addr->sa_family != addr->sa_family || 1121 ifa->ifa_dstaddr == NULL) 1122 continue; 1123 if (equal(addr, ifa->ifa_dstaddr)) 1124 return ifa; 1125 } 1126 } 1127 return NULL; 1128 } 1129 1130 /* 1131 * Find an interface on a specific network. If many, choice 1132 * is most specific found. 1133 */ 1134 struct ifaddr * 1135 ifa_ifwithnet(const struct sockaddr *addr) 1136 { 1137 struct ifnet *ifp; 1138 struct ifaddr *ifa; 1139 const struct sockaddr_dl *sdl; 1140 struct ifaddr *ifa_maybe = 0; 1141 u_int af = addr->sa_family; 1142 const char *addr_data = addr->sa_data, *cplim; 1143 1144 if (af == AF_LINK) { 1145 sdl = satocsdl(addr); 1146 if (sdl->sdl_index && sdl->sdl_index < if_indexlim && 1147 ifindex2ifnet[sdl->sdl_index] && 1148 ifindex2ifnet[sdl->sdl_index]->if_output != if_nulloutput) 1149 return ifnet_addrs[sdl->sdl_index]; 1150 } 1151 #ifdef NETATALK 1152 if (af == AF_APPLETALK) { 1153 const struct sockaddr_at *sat, *sat2; 1154 sat = (const struct sockaddr_at *)addr; 1155 IFNET_FOREACH(ifp) { 1156 if (ifp->if_output == if_nulloutput) 1157 continue; 1158 ifa = at_ifawithnet((const struct sockaddr_at *)addr, ifp); 1159 if (ifa == NULL) 1160 continue; 1161 sat2 = (struct sockaddr_at *)ifa->ifa_addr; 1162 if (sat2->sat_addr.s_net == sat->sat_addr.s_net) 1163 return ifa; /* exact match */ 1164 if (ifa_maybe == NULL) { 1165 /* else keep the if with the right range */ 1166 ifa_maybe = ifa; 1167 } 1168 } 1169 return ifa_maybe; 1170 } 1171 #endif 1172 IFNET_FOREACH(ifp) { 1173 if (ifp->if_output == if_nulloutput) 1174 continue; 1175 IFADDR_FOREACH(ifa, ifp) { 1176 const char *cp, *cp2, *cp3; 1177 1178 if (ifa->ifa_addr->sa_family != af || 1179 ifa->ifa_netmask == NULL) 1180 next: continue; 1181 cp = addr_data; 1182 cp2 = ifa->ifa_addr->sa_data; 1183 cp3 = ifa->ifa_netmask->sa_data; 1184 cplim = (const char *)ifa->ifa_netmask + 1185 ifa->ifa_netmask->sa_len; 1186 while (cp3 < cplim) { 1187 if ((*cp++ ^ *cp2++) & *cp3++) { 1188 /* want to continue for() loop */ 1189 goto next; 1190 } 1191 } 1192 if (ifa_maybe == NULL || 1193 rn_refines((void *)ifa->ifa_netmask, 1194 (void *)ifa_maybe->ifa_netmask)) 1195 ifa_maybe = ifa; 1196 } 1197 } 1198 return ifa_maybe; 1199 } 1200 1201 /* 1202 * Find the interface of the addresss. 1203 */ 1204 struct ifaddr * 1205 ifa_ifwithladdr(const struct sockaddr *addr) 1206 { 1207 struct ifaddr *ia; 1208 1209 if ((ia = ifa_ifwithaddr(addr)) || (ia = ifa_ifwithdstaddr(addr)) || 1210 (ia = ifa_ifwithnet(addr))) 1211 return ia; 1212 return NULL; 1213 } 1214 1215 /* 1216 * Find an interface using a specific address family 1217 */ 1218 struct ifaddr * 1219 ifa_ifwithaf(int af) 1220 { 1221 struct ifnet *ifp; 1222 struct ifaddr *ifa; 1223 1224 IFNET_FOREACH(ifp) { 1225 if (ifp->if_output == if_nulloutput) 1226 continue; 1227 IFADDR_FOREACH(ifa, ifp) { 1228 if (ifa->ifa_addr->sa_family == af) 1229 return ifa; 1230 } 1231 } 1232 return NULL; 1233 } 1234 1235 /* 1236 * Find an interface address specific to an interface best matching 1237 * a given address. 1238 */ 1239 struct ifaddr * 1240 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp) 1241 { 1242 struct ifaddr *ifa; 1243 const char *cp, *cp2, *cp3; 1244 const char *cplim; 1245 struct ifaddr *ifa_maybe = 0; 1246 u_int af = addr->sa_family; 1247 1248 if (ifp->if_output == if_nulloutput) 1249 return NULL; 1250 1251 if (af >= AF_MAX) 1252 return NULL; 1253 1254 IFADDR_FOREACH(ifa, ifp) { 1255 if (ifa->ifa_addr->sa_family != af) 1256 continue; 1257 ifa_maybe = ifa; 1258 if (ifa->ifa_netmask == NULL) { 1259 if (equal(addr, ifa->ifa_addr) || 1260 (ifa->ifa_dstaddr && 1261 equal(addr, ifa->ifa_dstaddr))) 1262 return ifa; 1263 continue; 1264 } 1265 cp = addr->sa_data; 1266 cp2 = ifa->ifa_addr->sa_data; 1267 cp3 = ifa->ifa_netmask->sa_data; 1268 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1269 for (; cp3 < cplim; cp3++) { 1270 if ((*cp++ ^ *cp2++) & *cp3) 1271 break; 1272 } 1273 if (cp3 == cplim) 1274 return ifa; 1275 } 1276 return ifa_maybe; 1277 } 1278 1279 /* 1280 * Default action when installing a route with a Link Level gateway. 1281 * Lookup an appropriate real ifa to point to. 1282 * This should be moved to /sys/net/link.c eventually. 1283 */ 1284 void 1285 link_rtrequest(int cmd, struct rtentry *rt, const struct rt_addrinfo *info) 1286 { 1287 struct ifaddr *ifa; 1288 const struct sockaddr *dst; 1289 struct ifnet *ifp; 1290 1291 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL || 1292 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_getkey(rt)) == NULL) 1293 return; 1294 if ((ifa = ifaof_ifpforaddr(dst, ifp)) != NULL) { 1295 rt_replace_ifa(rt, ifa); 1296 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1297 ifa->ifa_rtrequest(cmd, rt, info); 1298 } 1299 } 1300 1301 /* 1302 * Handle a change in the interface link state. 1303 */ 1304 void 1305 if_link_state_change(struct ifnet *ifp, int link_state) 1306 { 1307 if (ifp->if_link_state == link_state) 1308 return; 1309 ifp->if_link_state = link_state; 1310 /* Notify that the link state has changed. */ 1311 rt_ifmsg(ifp); 1312 #if NCARP > 0 1313 if (ifp->if_carp) 1314 carp_carpdev_state(ifp); 1315 #endif 1316 } 1317 1318 /* 1319 * Mark an interface down and notify protocols of 1320 * the transition. 1321 * NOTE: must be called at splsoftnet or equivalent. 1322 */ 1323 void 1324 if_down(struct ifnet *ifp) 1325 { 1326 struct ifaddr *ifa; 1327 1328 ifp->if_flags &= ~IFF_UP; 1329 nanotime(&ifp->if_lastchange); 1330 IFADDR_FOREACH(ifa, ifp) 1331 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1332 IFQ_PURGE(&ifp->if_snd); 1333 #if NCARP > 0 1334 if (ifp->if_carp) 1335 carp_carpdev_state(ifp); 1336 #endif 1337 rt_ifmsg(ifp); 1338 } 1339 1340 /* 1341 * Mark an interface up and notify protocols of 1342 * the transition. 1343 * NOTE: must be called at splsoftnet or equivalent. 1344 */ 1345 void 1346 if_up(struct ifnet *ifp) 1347 { 1348 #ifdef notyet 1349 struct ifaddr *ifa; 1350 #endif 1351 1352 ifp->if_flags |= IFF_UP; 1353 nanotime(&ifp->if_lastchange); 1354 #ifdef notyet 1355 /* this has no effect on IP, and will kill all ISO connections XXX */ 1356 IFADDR_FOREACH(ifa, ifp) 1357 pfctlinput(PRC_IFUP, ifa->ifa_addr); 1358 #endif 1359 #if NCARP > 0 1360 if (ifp->if_carp) 1361 carp_carpdev_state(ifp); 1362 #endif 1363 rt_ifmsg(ifp); 1364 #ifdef INET6 1365 in6_if_up(ifp); 1366 #endif 1367 } 1368 1369 /* 1370 * Handle interface watchdog timer routines. Called 1371 * from softclock, we decrement timers (if set) and 1372 * call the appropriate interface routine on expiration. 1373 */ 1374 void 1375 if_slowtimo(void *arg) 1376 { 1377 struct ifnet *ifp; 1378 int s = splnet(); 1379 1380 IFNET_FOREACH(ifp) { 1381 if (ifp->if_timer == 0 || --ifp->if_timer) 1382 continue; 1383 if (ifp->if_watchdog != NULL) 1384 (*ifp->if_watchdog)(ifp); 1385 } 1386 splx(s); 1387 callout_reset(&if_slowtimo_ch, hz / IFNET_SLOWHZ, if_slowtimo, NULL); 1388 } 1389 1390 /* 1391 * Set/clear promiscuous mode on interface ifp based on the truth value 1392 * of pswitch. The calls are reference counted so that only the first 1393 * "on" request actually has an effect, as does the final "off" request. 1394 * Results are undefined if the "off" and "on" requests are not matched. 1395 */ 1396 int 1397 ifpromisc(struct ifnet *ifp, int pswitch) 1398 { 1399 int pcount, ret; 1400 short flags; 1401 struct ifreq ifr; 1402 1403 pcount = ifp->if_pcount; 1404 flags = ifp->if_flags; 1405 if (pswitch) { 1406 /* 1407 * Allow the device to be "placed" into promiscuous 1408 * mode even if it is not configured up. It will 1409 * consult IFF_PROMISC when it is brought up. 1410 */ 1411 if (ifp->if_pcount++ != 0) 1412 return 0; 1413 ifp->if_flags |= IFF_PROMISC; 1414 if ((ifp->if_flags & IFF_UP) == 0) 1415 return 0; 1416 } else { 1417 if (--ifp->if_pcount > 0) 1418 return 0; 1419 ifp->if_flags &= ~IFF_PROMISC; 1420 /* 1421 * If the device is not configured up, we should not need to 1422 * turn off promiscuous mode (device should have turned it 1423 * off when interface went down; and will look at IFF_PROMISC 1424 * again next time interface comes up). 1425 */ 1426 if ((ifp->if_flags & IFF_UP) == 0) 1427 return 0; 1428 } 1429 memset(&ifr, 0, sizeof(ifr)); 1430 ifr.ifr_flags = ifp->if_flags; 1431 ret = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, &ifr); 1432 /* Restore interface state if not successful. */ 1433 if (ret != 0) { 1434 ifp->if_pcount = pcount; 1435 ifp->if_flags = flags; 1436 } 1437 return ret; 1438 } 1439 1440 /* 1441 * Map interface name to 1442 * interface structure pointer. 1443 */ 1444 struct ifnet * 1445 ifunit(const char *name) 1446 { 1447 struct ifnet *ifp; 1448 const char *cp = name; 1449 u_int unit = 0; 1450 u_int i; 1451 1452 /* 1453 * If the entire name is a number, treat it as an ifindex. 1454 */ 1455 for (i = 0; i < IFNAMSIZ && *cp >= '0' && *cp <= '9'; i++, cp++) { 1456 unit = unit * 10 + (*cp - '0'); 1457 } 1458 1459 /* 1460 * If the number took all of the name, then it's a valid ifindex. 1461 */ 1462 if (i == IFNAMSIZ || (cp != name && *cp == '\0')) { 1463 if (unit >= if_indexlim) 1464 return NULL; 1465 ifp = ifindex2ifnet[unit]; 1466 if (ifp == NULL || ifp->if_output == if_nulloutput) 1467 return NULL; 1468 return ifp; 1469 } 1470 1471 IFNET_FOREACH(ifp) { 1472 if (ifp->if_output == if_nulloutput) 1473 continue; 1474 if (strcmp(ifp->if_xname, name) == 0) 1475 return ifp; 1476 } 1477 return NULL; 1478 } 1479 1480 /* common */ 1481 int 1482 ifioctl_common(struct ifnet *ifp, u_long cmd, void *data) 1483 { 1484 int s; 1485 struct ifreq *ifr; 1486 struct ifcapreq *ifcr; 1487 struct ifdatareq *ifdr; 1488 1489 switch (cmd) { 1490 case SIOCSIFCAP: 1491 ifcr = data; 1492 if ((ifcr->ifcr_capenable & ~ifp->if_capabilities) != 0) 1493 return EINVAL; 1494 1495 if (ifcr->ifcr_capenable == ifp->if_capenable) 1496 return 0; 1497 1498 ifp->if_capenable = ifcr->ifcr_capenable; 1499 1500 /* Pre-compute the checksum flags mask. */ 1501 ifp->if_csum_flags_tx = 0; 1502 ifp->if_csum_flags_rx = 0; 1503 if (ifp->if_capenable & IFCAP_CSUM_IPv4_Tx) { 1504 ifp->if_csum_flags_tx |= M_CSUM_IPv4; 1505 } 1506 if (ifp->if_capenable & IFCAP_CSUM_IPv4_Rx) { 1507 ifp->if_csum_flags_rx |= M_CSUM_IPv4; 1508 } 1509 1510 if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Tx) { 1511 ifp->if_csum_flags_tx |= M_CSUM_TCPv4; 1512 } 1513 if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Rx) { 1514 ifp->if_csum_flags_rx |= M_CSUM_TCPv4; 1515 } 1516 1517 if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Tx) { 1518 ifp->if_csum_flags_tx |= M_CSUM_UDPv4; 1519 } 1520 if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Rx) { 1521 ifp->if_csum_flags_rx |= M_CSUM_UDPv4; 1522 } 1523 1524 if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Tx) { 1525 ifp->if_csum_flags_tx |= M_CSUM_TCPv6; 1526 } 1527 if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Rx) { 1528 ifp->if_csum_flags_rx |= M_CSUM_TCPv6; 1529 } 1530 1531 if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Tx) { 1532 ifp->if_csum_flags_tx |= M_CSUM_UDPv6; 1533 } 1534 if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Rx) { 1535 ifp->if_csum_flags_rx |= M_CSUM_UDPv6; 1536 } 1537 if (ifp->if_flags & IFF_UP) 1538 return ENETRESET; 1539 return 0; 1540 case SIOCSIFFLAGS: 1541 ifr = data; 1542 if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) { 1543 s = splnet(); 1544 if_down(ifp); 1545 splx(s); 1546 } 1547 if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) { 1548 s = splnet(); 1549 if_up(ifp); 1550 splx(s); 1551 } 1552 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 1553 (ifr->ifr_flags &~ IFF_CANTCHANGE); 1554 break; 1555 case SIOCGIFFLAGS: 1556 ifr = data; 1557 ifr->ifr_flags = ifp->if_flags; 1558 break; 1559 1560 case SIOCGIFMETRIC: 1561 ifr = data; 1562 ifr->ifr_metric = ifp->if_metric; 1563 break; 1564 1565 case SIOCGIFMTU: 1566 ifr = data; 1567 ifr->ifr_mtu = ifp->if_mtu; 1568 break; 1569 1570 case SIOCGIFDLT: 1571 ifr = data; 1572 ifr->ifr_dlt = ifp->if_dlt; 1573 break; 1574 1575 case SIOCGIFCAP: 1576 ifcr = data; 1577 ifcr->ifcr_capabilities = ifp->if_capabilities; 1578 ifcr->ifcr_capenable = ifp->if_capenable; 1579 break; 1580 1581 case SIOCSIFMETRIC: 1582 ifr = data; 1583 ifp->if_metric = ifr->ifr_metric; 1584 break; 1585 1586 case SIOCGIFDATA: 1587 ifdr = data; 1588 ifdr->ifdr_data = ifp->if_data; 1589 break; 1590 1591 case SIOCZIFDATA: 1592 ifdr = data; 1593 ifdr->ifdr_data = ifp->if_data; 1594 /* 1595 * Assumes that the volatile counters that can be 1596 * zero'ed are at the end of if_data. 1597 */ 1598 memset(&ifp->if_data.ifi_ipackets, 0, sizeof(ifp->if_data) - 1599 offsetof(struct if_data, ifi_ipackets)); 1600 break; 1601 case SIOCSIFMTU: 1602 ifr = data; 1603 if (ifp->if_mtu == ifr->ifr_mtu) 1604 break; 1605 ifp->if_mtu = ifr->ifr_mtu; 1606 /* 1607 * If the link MTU changed, do network layer specific procedure. 1608 */ 1609 #ifdef INET6 1610 nd6_setmtu(ifp); 1611 #endif 1612 return ENETRESET; 1613 default: 1614 return ENOTTY; 1615 } 1616 return 0; 1617 } 1618 1619 int 1620 ifaddrpref_ioctl(struct socket *so, u_long cmd, void *data, struct ifnet *ifp, 1621 lwp_t *l) 1622 { 1623 struct if_addrprefreq *ifap = (struct if_addrprefreq *)data; 1624 struct ifaddr *ifa; 1625 const struct sockaddr *any, *sa; 1626 union { 1627 struct sockaddr sa; 1628 struct sockaddr_storage ss; 1629 } u, v; 1630 1631 switch (cmd) { 1632 case SIOCSIFADDRPREF: 1633 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_INTERFACE, 1634 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1635 NULL) != 0) 1636 return EPERM; 1637 case SIOCGIFADDRPREF: 1638 break; 1639 default: 1640 return EOPNOTSUPP; 1641 } 1642 1643 /* sanity checks */ 1644 if (data == NULL || ifp == NULL) { 1645 panic("invalid argument to %s", __func__); 1646 /*NOTREACHED*/ 1647 } 1648 1649 /* address must be specified on ADD and DELETE */ 1650 sa = sstocsa(&ifap->ifap_addr); 1651 if (sa->sa_family != sofamily(so)) 1652 return EINVAL; 1653 if ((any = sockaddr_any(sa)) == NULL || sa->sa_len != any->sa_len) 1654 return EINVAL; 1655 1656 sockaddr_externalize(&v.sa, sizeof(v.ss), sa); 1657 1658 IFADDR_FOREACH(ifa, ifp) { 1659 if (ifa->ifa_addr->sa_family != sa->sa_family) 1660 continue; 1661 sockaddr_externalize(&u.sa, sizeof(u.ss), ifa->ifa_addr); 1662 if (sockaddr_cmp(&u.sa, &v.sa) == 0) 1663 break; 1664 } 1665 if (ifa == NULL) 1666 return EADDRNOTAVAIL; 1667 1668 switch (cmd) { 1669 case SIOCSIFADDRPREF: 1670 ifa->ifa_preference = ifap->ifap_preference; 1671 return 0; 1672 case SIOCGIFADDRPREF: 1673 /* fill in the if_laddrreq structure */ 1674 (void)sockaddr_copy(sstosa(&ifap->ifap_addr), 1675 sizeof(ifap->ifap_addr), ifa->ifa_addr); 1676 ifap->ifap_preference = ifa->ifa_preference; 1677 return 0; 1678 default: 1679 return EOPNOTSUPP; 1680 } 1681 } 1682 1683 /* 1684 * Interface ioctls. 1685 */ 1686 int 1687 ifioctl(struct socket *so, u_long cmd, void *data, struct lwp *l) 1688 { 1689 struct ifnet *ifp; 1690 struct ifreq *ifr; 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 1728 ifp = ifunit(ifr->ifr_name); 1729 1730 switch (cmd) { 1731 case SIOCIFCREATE: 1732 case SIOCIFDESTROY: 1733 if (l != NULL) { 1734 error = kauth_authorize_network(l->l_cred, 1735 KAUTH_NETWORK_INTERFACE, 1736 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, 1737 (void *)cmd, NULL); 1738 if (error != 0) 1739 return error; 1740 } 1741 return (cmd == SIOCIFCREATE) ? 1742 if_clone_create(ifr->ifr_name) : 1743 if_clone_destroy(ifr->ifr_name); 1744 1745 case SIOCIFGCLONERS: 1746 return if_clone_list((struct if_clonereq *)data); 1747 } 1748 1749 if (ifp == NULL) 1750 return ENXIO; 1751 1752 switch (cmd) { 1753 case SIOCALIFADDR: 1754 case SIOCDLIFADDR: 1755 case SIOCSIFADDRPREF: 1756 case SIOCSIFFLAGS: 1757 case SIOCSIFCAP: 1758 case SIOCSIFMETRIC: 1759 case SIOCZIFDATA: 1760 case SIOCSIFMTU: 1761 case SIOCSIFPHYADDR: 1762 case SIOCDIFPHYADDR: 1763 #ifdef INET6 1764 case SIOCSIFPHYADDR_IN6: 1765 #endif 1766 case SIOCSLIFPHYADDR: 1767 case SIOCADDMULTI: 1768 case SIOCDELMULTI: 1769 case SIOCSIFMEDIA: 1770 case SIOCSDRVSPEC: 1771 case SIOCG80211: 1772 case SIOCS80211: 1773 case SIOCS80211NWID: 1774 case SIOCS80211NWKEY: 1775 case SIOCS80211POWER: 1776 case SIOCS80211BSSID: 1777 case SIOCS80211CHANNEL: 1778 case SIOCSLINKSTR: 1779 if (l != NULL) { 1780 error = kauth_authorize_network(l->l_cred, 1781 KAUTH_NETWORK_INTERFACE, 1782 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, 1783 (void *)cmd, NULL); 1784 if (error != 0) 1785 return error; 1786 } 1787 } 1788 1789 oif_flags = ifp->if_flags; 1790 1791 error = (*ifp->if_ioctl)(ifp, cmd, data); 1792 if (error != ENOTTY) 1793 ; 1794 else if (so->so_proto == NULL) 1795 return EOPNOTSUPP; 1796 else { 1797 #ifdef COMPAT_OSOCK 1798 error = compat_ifioctl(so, ocmd, cmd, data, l); 1799 #else 1800 error = (*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 1801 (struct mbuf *)cmd, (struct mbuf *)data, 1802 (struct mbuf *)ifp, l); 1803 #endif 1804 } 1805 1806 if (((oif_flags ^ ifp->if_flags) & IFF_UP) != 0) { 1807 #ifdef INET6 1808 if ((ifp->if_flags & IFF_UP) != 0) { 1809 int s = splnet(); 1810 in6_if_up(ifp); 1811 splx(s); 1812 } 1813 #endif 1814 } 1815 #ifdef COMPAT_OIFREQ 1816 if (cmd != ocmd) 1817 ifreqn2o(oifr, ifr); 1818 #endif 1819 1820 return error; 1821 } 1822 1823 /* 1824 * Return interface configuration 1825 * of system. List may be used 1826 * in later ioctl's (above) to get 1827 * other information. 1828 * 1829 * Each record is a struct ifreq. Before the addition of 1830 * sockaddr_storage, the API rule was that sockaddr flavors that did 1831 * not fit would extend beyond the struct ifreq, with the next struct 1832 * ifreq starting sa_len beyond the struct sockaddr. Because the 1833 * union in struct ifreq includes struct sockaddr_storage, every kind 1834 * of sockaddr must fit. Thus, there are no longer any overlength 1835 * records. 1836 * 1837 * Records are added to the user buffer if they fit, and ifc_len is 1838 * adjusted to the length that was written. Thus, the user is only 1839 * assured of getting the complete list if ifc_len on return is at 1840 * least sizeof(struct ifreq) less than it was on entry. 1841 * 1842 * If the user buffer pointer is NULL, this routine copies no data and 1843 * returns the amount of space that would be needed. 1844 * 1845 * Invariants: 1846 * ifrp points to the next part of the user's buffer to be used. If 1847 * ifrp != NULL, space holds the number of bytes remaining that we may 1848 * write at ifrp. Otherwise, space holds the number of bytes that 1849 * would have been written had there been adequate space. 1850 */ 1851 /*ARGSUSED*/ 1852 int 1853 ifconf(u_long cmd, void *data) 1854 { 1855 struct ifconf *ifc = (struct ifconf *)data; 1856 struct ifnet *ifp; 1857 struct ifaddr *ifa; 1858 struct ifreq ifr, *ifrp; 1859 int space, error = 0; 1860 const int sz = (int)sizeof(struct ifreq); 1861 1862 if ((ifrp = ifc->ifc_req) == NULL) 1863 space = 0; 1864 else 1865 space = ifc->ifc_len; 1866 IFNET_FOREACH(ifp) { 1867 (void)strncpy(ifr.ifr_name, ifp->if_xname, 1868 sizeof(ifr.ifr_name)); 1869 if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0') 1870 return ENAMETOOLONG; 1871 if (IFADDR_EMPTY(ifp)) { 1872 /* Interface with no addresses - send zero sockaddr. */ 1873 memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr)); 1874 if (ifrp == NULL) { 1875 space += sz; 1876 continue; 1877 } 1878 if (space >= sz) { 1879 error = copyout(&ifr, ifrp, sz); 1880 if (error != 0) 1881 return error; 1882 ifrp++; 1883 space -= sz; 1884 } 1885 } 1886 1887 IFADDR_FOREACH(ifa, ifp) { 1888 struct sockaddr *sa = ifa->ifa_addr; 1889 /* all sockaddrs must fit in sockaddr_storage */ 1890 KASSERT(sa->sa_len <= sizeof(ifr.ifr_ifru)); 1891 1892 if (ifrp == NULL) { 1893 space += sz; 1894 continue; 1895 } 1896 memcpy(&ifr.ifr_space, sa, sa->sa_len); 1897 if (space >= sz) { 1898 error = copyout(&ifr, ifrp, sz); 1899 if (error != 0) 1900 return (error); 1901 ifrp++; space -= sz; 1902 } 1903 } 1904 } 1905 if (ifrp != NULL) { 1906 KASSERT(0 <= space && space <= ifc->ifc_len); 1907 ifc->ifc_len -= space; 1908 } else { 1909 KASSERT(space >= 0); 1910 ifc->ifc_len = space; 1911 } 1912 return (0); 1913 } 1914 1915 int 1916 ifreq_setaddr(u_long cmd, struct ifreq *ifr, const struct sockaddr *sa) 1917 { 1918 uint8_t len; 1919 #ifdef COMPAT_OIFREQ 1920 struct ifreq ifrb; 1921 struct oifreq *oifr = NULL; 1922 u_long ocmd = cmd; 1923 cmd = compat_cvtcmd(cmd); 1924 if (cmd != ocmd) { 1925 oifr = (struct oifreq *)(void *)ifr; 1926 ifr = &ifrb; 1927 ifreqo2n(oifr, ifr); 1928 len = sizeof(oifr->ifr_addr); 1929 } else 1930 #endif 1931 len = sizeof(ifr->ifr_ifru.ifru_space); 1932 1933 if (len < sa->sa_len) 1934 return EFBIG; 1935 1936 memset(&ifr->ifr_addr, 0, len); 1937 sockaddr_copy(&ifr->ifr_addr, len, sa); 1938 1939 #ifdef COMPAT_OIFREQ 1940 if (cmd != ocmd) 1941 ifreqn2o(oifr, ifr); 1942 #endif 1943 return 0; 1944 } 1945 1946 /* 1947 * Queue message on interface, and start output if interface 1948 * not yet active. 1949 */ 1950 int 1951 ifq_enqueue(struct ifnet *ifp, struct mbuf *m 1952 ALTQ_COMMA ALTQ_DECL(struct altq_pktattr *pktattr)) 1953 { 1954 int len = m->m_pkthdr.len; 1955 int mflags = m->m_flags; 1956 int s = splnet(); 1957 int error; 1958 1959 IFQ_ENQUEUE(&ifp->if_snd, m, pktattr, error); 1960 if (error != 0) 1961 goto out; 1962 ifp->if_obytes += len; 1963 if (mflags & M_MCAST) 1964 ifp->if_omcasts++; 1965 if ((ifp->if_flags & IFF_OACTIVE) == 0) 1966 (*ifp->if_start)(ifp); 1967 out: 1968 splx(s); 1969 return error; 1970 } 1971 1972 /* 1973 * Queue message on interface, possibly using a second fast queue 1974 */ 1975 int 1976 ifq_enqueue2(struct ifnet *ifp, struct ifqueue *ifq, struct mbuf *m 1977 ALTQ_COMMA ALTQ_DECL(struct altq_pktattr *pktattr)) 1978 { 1979 int error = 0; 1980 1981 if (ifq != NULL 1982 #ifdef ALTQ 1983 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 1984 #endif 1985 ) { 1986 if (IF_QFULL(ifq)) { 1987 IF_DROP(&ifp->if_snd); 1988 m_freem(m); 1989 if (error == 0) 1990 error = ENOBUFS; 1991 } else 1992 IF_ENQUEUE(ifq, m); 1993 } else 1994 IFQ_ENQUEUE(&ifp->if_snd, m, pktattr, error); 1995 if (error != 0) { 1996 ++ifp->if_oerrors; 1997 return error; 1998 } 1999 return 0; 2000 } 2001 2002 2003 static void 2004 sysctl_sndq_setup(struct sysctllog **clog, const char *ifname, 2005 struct ifaltq *ifq) 2006 { 2007 const struct sysctlnode *cnode, *rnode; 2008 2009 if (sysctl_createv(clog, 0, NULL, &rnode, 2010 CTLFLAG_PERMANENT, 2011 CTLTYPE_NODE, "net", NULL, 2012 NULL, 0, NULL, 0, 2013 CTL_NET, CTL_EOL) != 0) 2014 goto bad; 2015 2016 if (sysctl_createv(clog, 0, &rnode, &rnode, 2017 CTLFLAG_PERMANENT, 2018 CTLTYPE_NODE, "interfaces", 2019 SYSCTL_DESCR("Per-interface controls"), 2020 NULL, 0, NULL, 0, 2021 CTL_CREATE, CTL_EOL) != 0) 2022 goto bad; 2023 2024 if (sysctl_createv(clog, 0, &rnode, &rnode, 2025 CTLFLAG_PERMANENT, 2026 CTLTYPE_NODE, ifname, 2027 SYSCTL_DESCR("Interface controls"), 2028 NULL, 0, NULL, 0, 2029 CTL_CREATE, CTL_EOL) != 0) 2030 goto bad; 2031 2032 if (sysctl_createv(clog, 0, &rnode, &rnode, 2033 CTLFLAG_PERMANENT, 2034 CTLTYPE_NODE, "sndq", 2035 SYSCTL_DESCR("Interface output queue controls"), 2036 NULL, 0, NULL, 0, 2037 CTL_CREATE, CTL_EOL) != 0) 2038 goto bad; 2039 2040 if (sysctl_createv(clog, 0, &rnode, &cnode, 2041 CTLFLAG_PERMANENT, 2042 CTLTYPE_INT, "len", 2043 SYSCTL_DESCR("Current output queue length"), 2044 NULL, 0, &ifq->ifq_len, 0, 2045 CTL_CREATE, CTL_EOL) != 0) 2046 goto bad; 2047 2048 if (sysctl_createv(clog, 0, &rnode, &cnode, 2049 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2050 CTLTYPE_INT, "maxlen", 2051 SYSCTL_DESCR("Maximum allowed output queue length"), 2052 NULL, 0, &ifq->ifq_maxlen, 0, 2053 CTL_CREATE, CTL_EOL) != 0) 2054 goto bad; 2055 2056 if (sysctl_createv(clog, 0, &rnode, &cnode, 2057 CTLFLAG_PERMANENT, 2058 CTLTYPE_INT, "drops", 2059 SYSCTL_DESCR("Packets dropped due to full output queue"), 2060 NULL, 0, &ifq->ifq_drops, 0, 2061 CTL_CREATE, CTL_EOL) != 0) 2062 goto bad; 2063 2064 return; 2065 bad: 2066 printf("%s: could not attach sysctl nodes\n", ifname); 2067 return; 2068 } 2069 2070 #if defined(INET) || defined(INET6) 2071 static void 2072 sysctl_net_ifq_setup(struct sysctllog **clog, 2073 int pf, const char *pfname, 2074 int ipn, const char *ipname, 2075 int qid, struct ifqueue *ifq) 2076 { 2077 2078 sysctl_createv(clog, 0, NULL, NULL, 2079 CTLFLAG_PERMANENT, 2080 CTLTYPE_NODE, "net", NULL, 2081 NULL, 0, NULL, 0, 2082 CTL_NET, CTL_EOL); 2083 sysctl_createv(clog, 0, NULL, NULL, 2084 CTLFLAG_PERMANENT, 2085 CTLTYPE_NODE, pfname, NULL, 2086 NULL, 0, NULL, 0, 2087 CTL_NET, pf, CTL_EOL); 2088 sysctl_createv(clog, 0, NULL, NULL, 2089 CTLFLAG_PERMANENT, 2090 CTLTYPE_NODE, ipname, NULL, 2091 NULL, 0, NULL, 0, 2092 CTL_NET, pf, ipn, CTL_EOL); 2093 sysctl_createv(clog, 0, NULL, NULL, 2094 CTLFLAG_PERMANENT, 2095 CTLTYPE_NODE, "ifq", 2096 SYSCTL_DESCR("Protocol input queue controls"), 2097 NULL, 0, NULL, 0, 2098 CTL_NET, pf, ipn, qid, CTL_EOL); 2099 2100 sysctl_createv(clog, 0, NULL, NULL, 2101 CTLFLAG_PERMANENT, 2102 CTLTYPE_INT, "len", 2103 SYSCTL_DESCR("Current input queue length"), 2104 NULL, 0, &ifq->ifq_len, 0, 2105 CTL_NET, pf, ipn, qid, IFQCTL_LEN, CTL_EOL); 2106 sysctl_createv(clog, 0, NULL, NULL, 2107 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2108 CTLTYPE_INT, "maxlen", 2109 SYSCTL_DESCR("Maximum allowed input queue length"), 2110 NULL, 0, &ifq->ifq_maxlen, 0, 2111 CTL_NET, pf, ipn, qid, IFQCTL_MAXLEN, CTL_EOL); 2112 #ifdef notyet 2113 sysctl_createv(clog, 0, NULL, NULL, 2114 CTLFLAG_PERMANENT, 2115 CTLTYPE_INT, "peak", 2116 SYSCTL_DESCR("Highest input queue length"), 2117 NULL, 0, &ifq->ifq_peak, 0, 2118 CTL_NET, pf, ipn, qid, IFQCTL_PEAK, CTL_EOL); 2119 #endif 2120 sysctl_createv(clog, 0, NULL, NULL, 2121 CTLFLAG_PERMANENT, 2122 CTLTYPE_INT, "drops", 2123 SYSCTL_DESCR("Packets dropped due to full input queue"), 2124 NULL, 0, &ifq->ifq_drops, 0, 2125 CTL_NET, pf, ipn, qid, IFQCTL_DROPS, CTL_EOL); 2126 } 2127 #endif /* INET || INET6 */ 2128
Indexes created Sun Sep 21 20:09:37 GMT 2025