if.c revision 1.238
1 /* $NetBSD: if.c,v 1.238 2009/09/19 11:02:07 skrll 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 1.238 2009/09/19 11:02:07 skrll 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 void if_detach_queues(struct ifnet *, struct ifqueue *); 170 static void sysctl_sndq_setup(struct sysctllog **, const char *, 171 struct ifaltq *); 172 173 static void sysctl_net_ifq_setup(struct sysctllog **, int, const char *, 174 int, const char *, int, struct ifqueue *); 175 176 /* 177 * Network interface utility routines. 178 * 179 * Routines with ifa_ifwith* names take sockaddr *'s as 180 * parameters. 181 */ 182 void 183 ifinit(void) 184 { 185 #ifdef INET 186 {extern struct ifqueue ipintrq; 187 sysctl_net_ifq_setup(NULL, PF_INET, "inet", IPPROTO_IP, "ip", 188 IPCTL_IFQ, &ipintrq);} 189 #endif /* INET */ 190 #ifdef INET6 191 {extern struct ifqueue ip6intrq; 192 sysctl_net_ifq_setup(NULL, PF_INET6, "inet6", IPPROTO_IPV6, "ip6", 193 IPV6CTL_IFQ, &ip6intrq);} 194 #endif /* INET6 */ 195 196 callout_init(&if_slowtimo_ch, 0); 197 if_slowtimo(NULL); 198 } 199 200 /* 201 * XXX Initialization before configure(). 202 * XXX hack to get pfil_add_hook working in autoconf. 203 */ 204 void 205 ifinit1(void) 206 { 207 208 mutex_init(&index_gen_mtx, MUTEX_DEFAULT, IPL_NONE); 209 210 #ifdef PFIL_HOOKS 211 if_pfil.ph_type = PFIL_TYPE_IFNET; 212 if_pfil.ph_ifnet = NULL; 213 if (pfil_head_register(&if_pfil) != 0) 214 printf("WARNING: unable to register pfil hook\n"); 215 #endif 216 } 217 218 struct ifnet * 219 if_alloc(u_char type) 220 { 221 return malloc(sizeof(struct ifnet), M_DEVBUF, M_WAITOK|M_ZERO); 222 } 223 224 void 225 if_initname(struct ifnet *ifp, const char *name, int unit) 226 { 227 (void)snprintf(ifp->if_xname, sizeof(ifp->if_xname), 228 "%s%d", name, unit); 229 } 230 231 /* 232 * Null routines used while an interface is going away. These routines 233 * just return an error. 234 */ 235 236 int 237 if_nulloutput(struct ifnet *ifp, struct mbuf *m, 238 const struct sockaddr *so, struct rtentry *rt) 239 { 240 241 return ENXIO; 242 } 243 244 void 245 if_nullinput(struct ifnet *ifp, struct mbuf *m) 246 { 247 248 /* Nothing. */ 249 } 250 251 void 252 if_nullstart(struct ifnet *ifp) 253 { 254 255 /* Nothing. */ 256 } 257 258 int 259 if_nullioctl(struct ifnet *ifp, u_long cmd, void *data) 260 { 261 262 return ENXIO; 263 } 264 265 int 266 if_nullinit(struct ifnet *ifp) 267 { 268 269 return ENXIO; 270 } 271 272 void 273 if_nullstop(struct ifnet *ifp, int disable) 274 { 275 276 /* Nothing. */ 277 } 278 279 void 280 if_nullwatchdog(struct ifnet *ifp) 281 { 282 283 /* Nothing. */ 284 } 285 286 void 287 if_nulldrain(struct ifnet *ifp) 288 { 289 290 /* Nothing. */ 291 } 292 293 static u_int if_index = 1; 294 struct ifnet_head ifnet; 295 size_t if_indexlim = 0; 296 struct ifaddr **ifnet_addrs = NULL; 297 struct ifnet **ifindex2ifnet = NULL; 298 struct ifnet *lo0ifp; 299 300 void 301 if_set_sadl(struct ifnet *ifp, const void *lla, u_char addrlen, bool factory) 302 { 303 struct ifaddr *ifa; 304 struct sockaddr_dl *sdl; 305 306 ifp->if_addrlen = addrlen; 307 if_alloc_sadl(ifp); 308 ifa = ifp->if_dl; 309 sdl = satosdl(ifa->ifa_addr); 310 311 (void)sockaddr_dl_setaddr(sdl, sdl->sdl_len, lla, ifp->if_addrlen); 312 if (factory) { 313 ifp->if_hwdl = ifp->if_dl; 314 IFAREF(ifp->if_hwdl); 315 } 316 /* TBD routing socket */ 317 } 318 319 struct ifaddr * 320 if_dl_create(const struct ifnet *ifp, const struct sockaddr_dl **sdlp) 321 { 322 unsigned socksize, ifasize; 323 int addrlen, namelen; 324 struct sockaddr_dl *mask, *sdl; 325 struct ifaddr *ifa; 326 327 namelen = strlen(ifp->if_xname); 328 addrlen = ifp->if_addrlen; 329 socksize = roundup(sockaddr_dl_measure(namelen, addrlen), sizeof(long)); 330 ifasize = sizeof(*ifa) + 2 * socksize; 331 ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK|M_ZERO); 332 333 sdl = (struct sockaddr_dl *)(ifa + 1); 334 mask = (struct sockaddr_dl *)(socksize + (char *)sdl); 335 336 sockaddr_dl_init(sdl, socksize, ifp->if_index, ifp->if_type, 337 ifp->if_xname, namelen, NULL, addrlen); 338 mask->sdl_len = sockaddr_dl_measure(namelen, 0); 339 memset(&mask->sdl_data[0], 0xff, namelen); 340 ifa->ifa_rtrequest = link_rtrequest; 341 ifa->ifa_addr = (struct sockaddr *)sdl; 342 ifa->ifa_netmask = (struct sockaddr *)mask; 343 344 *sdlp = sdl; 345 346 return ifa; 347 } 348 349 static void 350 if_sadl_setrefs(struct ifnet *ifp, struct ifaddr *ifa) 351 { 352 const struct sockaddr_dl *sdl; 353 ifnet_addrs[ifp->if_index] = ifa; 354 IFAREF(ifa); 355 ifp->if_dl = ifa; 356 IFAREF(ifa); 357 sdl = satosdl(ifa->ifa_addr); 358 ifp->if_sadl = sdl; 359 } 360 361 /* 362 * Allocate the link level name for the specified interface. This 363 * is an attachment helper. It must be called after ifp->if_addrlen 364 * is initialized, which may not be the case when if_attach() is 365 * called. 366 */ 367 void 368 if_alloc_sadl(struct ifnet *ifp) 369 { 370 struct ifaddr *ifa; 371 const struct sockaddr_dl *sdl; 372 373 /* 374 * If the interface already has a link name, release it 375 * now. This is useful for interfaces that can change 376 * link types, and thus switch link names often. 377 */ 378 if (ifp->if_sadl != NULL) 379 if_free_sadl(ifp); 380 381 ifa = if_dl_create(ifp, &sdl); 382 383 ifa_insert(ifp, ifa); 384 if_sadl_setrefs(ifp, ifa); 385 } 386 387 static void 388 if_deactivate_sadl(struct ifnet *ifp) 389 { 390 struct ifaddr *ifa; 391 392 KASSERT(ifp->if_dl != NULL); 393 394 ifa = ifp->if_dl; 395 396 ifp->if_sadl = NULL; 397 398 ifnet_addrs[ifp->if_index] = NULL; 399 IFAFREE(ifa); 400 ifp->if_dl = NULL; 401 IFAFREE(ifa); 402 } 403 404 void 405 if_activate_sadl(struct ifnet *ifp, struct ifaddr *ifa, 406 const struct sockaddr_dl *sdl) 407 { 408 int s; 409 410 s = splnet(); 411 412 if_deactivate_sadl(ifp); 413 414 if_sadl_setrefs(ifp, ifa); 415 IFADDR_FOREACH(ifa, ifp) 416 rtinit(ifa, RTM_LLINFO_UPD, 0); 417 splx(s); 418 } 419 420 /* 421 * Free the link level name for the specified interface. This is 422 * a detach helper. This is called from if_detach() or from 423 * link layer type specific detach functions. 424 */ 425 void 426 if_free_sadl(struct ifnet *ifp) 427 { 428 struct ifaddr *ifa; 429 int s; 430 431 ifa = ifnet_addrs[ifp->if_index]; 432 if (ifa == NULL) { 433 KASSERT(ifp->if_sadl == NULL); 434 KASSERT(ifp->if_dl == NULL); 435 return; 436 } 437 438 KASSERT(ifp->if_sadl != NULL); 439 KASSERT(ifp->if_dl != NULL); 440 441 s = splnet(); 442 rtinit(ifa, RTM_DELETE, 0); 443 ifa_remove(ifp, ifa); 444 if_deactivate_sadl(ifp); 445 if (ifp->if_hwdl == ifa) { 446 IFAFREE(ifa); 447 ifp->if_hwdl = NULL; 448 } 449 splx(s); 450 } 451 452 /* 453 * Attach an interface to the 454 * list of "active" interfaces. 455 */ 456 void 457 if_attach(struct ifnet *ifp) 458 { 459 int indexlim = 0; 460 461 if (if_indexlim == 0) { 462 TAILQ_INIT(&ifnet); 463 if_indexlim = 8; 464 } 465 TAILQ_INIT(&ifp->if_addrlist); 466 TAILQ_INSERT_TAIL(&ifnet, ifp, if_list); 467 if (ifp->if_ioctl == NULL) 468 ifp->if_ioctl = ifioctl_common; 469 470 mutex_enter(&index_gen_mtx); 471 ifp->if_index_gen = index_gen++; 472 mutex_exit(&index_gen_mtx); 473 474 ifp->if_index = if_index; 475 if (ifindex2ifnet == NULL) 476 if_index++; 477 else 478 while (ifp->if_index < if_indexlim && 479 ifindex2ifnet[ifp->if_index] != NULL) { 480 ++if_index; 481 if (if_index == 0) 482 if_index = 1; 483 /* 484 * If we hit USHRT_MAX, we skip back to 0 since 485 * there are a number of places where the value 486 * of if_index or if_index itself is compared 487 * to or stored in an unsigned short. By 488 * jumping back, we won't botch those assignments 489 * or comparisons. 490 */ 491 else if (if_index == USHRT_MAX) { 492 /* 493 * However, if we have to jump back to 494 * zero *twice* without finding an empty 495 * slot in ifindex2ifnet[], then there 496 * there are too many (>65535) interfaces. 497 */ 498 if (indexlim++) 499 panic("too many interfaces"); 500 else 501 if_index = 1; 502 } 503 ifp->if_index = if_index; 504 } 505 506 /* 507 * We have some arrays that should be indexed by if_index. 508 * since if_index will grow dynamically, they should grow too. 509 * struct ifadd **ifnet_addrs 510 * struct ifnet **ifindex2ifnet 511 */ 512 if (ifnet_addrs == NULL || ifindex2ifnet == NULL || 513 ifp->if_index >= if_indexlim) { 514 size_t m, n, oldlim; 515 void *q; 516 517 oldlim = if_indexlim; 518 while (ifp->if_index >= if_indexlim) 519 if_indexlim <<= 1; 520 521 /* grow ifnet_addrs */ 522 m = oldlim * sizeof(struct ifaddr *); 523 n = if_indexlim * sizeof(struct ifaddr *); 524 q = malloc(n, M_IFADDR, M_WAITOK|M_ZERO); 525 if (ifnet_addrs != NULL) { 526 memcpy(q, ifnet_addrs, m); 527 free(ifnet_addrs, M_IFADDR); 528 } 529 ifnet_addrs = (struct ifaddr **)q; 530 531 /* grow ifindex2ifnet */ 532 m = oldlim * sizeof(struct ifnet *); 533 n = if_indexlim * sizeof(struct ifnet *); 534 q = malloc(n, M_IFADDR, M_WAITOK|M_ZERO); 535 if (ifindex2ifnet != NULL) { 536 memcpy(q, ifindex2ifnet, m); 537 free(ifindex2ifnet, M_IFADDR); 538 } 539 ifindex2ifnet = (struct ifnet **)q; 540 } 541 542 ifindex2ifnet[ifp->if_index] = ifp; 543 544 /* 545 * Link level name is allocated later by a separate call to 546 * if_alloc_sadl(). 547 */ 548 549 if (ifp->if_snd.ifq_maxlen == 0) 550 ifp->if_snd.ifq_maxlen = ifqmaxlen; 551 552 sysctl_sndq_setup(&ifp->if_sysctl_log, ifp->if_xname, &ifp->if_snd); 553 554 ifp->if_broadcastaddr = 0; /* reliably crash if used uninitialized */ 555 556 ifp->if_link_state = LINK_STATE_UNKNOWN; 557 558 ifp->if_capenable = 0; 559 ifp->if_csum_flags_tx = 0; 560 ifp->if_csum_flags_rx = 0; 561 562 #ifdef ALTQ 563 ifp->if_snd.altq_type = 0; 564 ifp->if_snd.altq_disc = NULL; 565 ifp->if_snd.altq_flags &= ALTQF_CANTCHANGE; 566 ifp->if_snd.altq_tbr = NULL; 567 ifp->if_snd.altq_ifp = ifp; 568 #endif 569 570 #ifdef PFIL_HOOKS 571 ifp->if_pfil.ph_type = PFIL_TYPE_IFNET; 572 ifp->if_pfil.ph_ifnet = ifp; 573 if (pfil_head_register(&ifp->if_pfil) != 0) 574 printf("%s: WARNING: unable to register pfil hook\n", 575 ifp->if_xname); 576 (void)pfil_run_hooks(&if_pfil, 577 (struct mbuf **)PFIL_IFNET_ATTACH, ifp, PFIL_IFNET); 578 #endif 579 580 if (!STAILQ_EMPTY(&domains)) 581 if_attachdomain1(ifp); 582 583 /* Announce the interface. */ 584 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 585 } 586 587 void 588 if_attachdomain(void) 589 { 590 struct ifnet *ifp; 591 int s; 592 593 s = splnet(); 594 IFNET_FOREACH(ifp) 595 if_attachdomain1(ifp); 596 splx(s); 597 } 598 599 void 600 if_attachdomain1(struct ifnet *ifp) 601 { 602 struct domain *dp; 603 int s; 604 605 s = splnet(); 606 607 /* address family dependent data region */ 608 memset(ifp->if_afdata, 0, sizeof(ifp->if_afdata)); 609 DOMAIN_FOREACH(dp) { 610 if (dp->dom_ifattach != NULL) 611 ifp->if_afdata[dp->dom_family] = 612 (*dp->dom_ifattach)(ifp); 613 } 614 615 splx(s); 616 } 617 618 /* 619 * Deactivate an interface. This points all of the procedure 620 * handles at error stubs. May be called from interrupt context. 621 */ 622 void 623 if_deactivate(struct ifnet *ifp) 624 { 625 int s; 626 627 s = splnet(); 628 629 ifp->if_output = if_nulloutput; 630 ifp->if_input = if_nullinput; 631 ifp->if_start = if_nullstart; 632 ifp->if_ioctl = if_nullioctl; 633 ifp->if_init = if_nullinit; 634 ifp->if_stop = if_nullstop; 635 ifp->if_watchdog = if_nullwatchdog; 636 ifp->if_drain = if_nulldrain; 637 638 /* No more packets may be enqueued. */ 639 ifp->if_snd.ifq_maxlen = 0; 640 641 splx(s); 642 } 643 644 void 645 if_purgeaddrs(struct ifnet *ifp, int family, void (*purgeaddr)(struct ifaddr *)) 646 { 647 struct ifaddr *ifa, *nifa; 648 649 for (ifa = IFADDR_FIRST(ifp); ifa != NULL; ifa = nifa) { 650 nifa = IFADDR_NEXT(ifa); 651 if (ifa->ifa_addr->sa_family != family) 652 continue; 653 (*purgeaddr)(ifa); 654 } 655 } 656 657 /* 658 * Detach an interface from the list of "active" interfaces, 659 * freeing any resources as we go along. 660 * 661 * NOTE: This routine must be called with a valid thread context, 662 * as it may block. 663 */ 664 void 665 if_detach(struct ifnet *ifp) 666 { 667 struct socket so; 668 struct ifaddr *ifa; 669 #ifdef IFAREF_DEBUG 670 struct ifaddr *last_ifa = NULL; 671 #endif 672 struct domain *dp; 673 const struct protosw *pr; 674 int s, i, family, purged; 675 676 /* 677 * XXX It's kind of lame that we have to have the 678 * XXX socket structure... 679 */ 680 memset(&so, 0, sizeof(so)); 681 682 s = splnet(); 683 684 /* 685 * Do an if_down() to give protocols a chance to do something. 686 */ 687 if_down(ifp); 688 689 #ifdef ALTQ 690 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 691 altq_disable(&ifp->if_snd); 692 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 693 altq_detach(&ifp->if_snd); 694 #endif 695 696 sysctl_teardown(&ifp->if_sysctl_log); 697 698 #if NCARP > 0 699 /* Remove the interface from any carp group it is a part of. */ 700 if (ifp->if_carp != NULL && ifp->if_type != IFT_CARP) 701 carp_ifdetach(ifp); 702 #endif 703 704 /* 705 * Rip all the addresses off the interface. This should make 706 * all of the routes go away. 707 * 708 * pr_usrreq calls can remove an arbitrary number of ifaddrs 709 * from the list, including our "cursor", ifa. For safety, 710 * and to honor the TAILQ abstraction, I just restart the 711 * loop after each removal. Note that the loop will exit 712 * when all of the remaining ifaddrs belong to the AF_LINK 713 * family. I am counting on the historical fact that at 714 * least one pr_usrreq in each address domain removes at 715 * least one ifaddr. 716 */ 717 again: 718 IFADDR_FOREACH(ifa, ifp) { 719 family = ifa->ifa_addr->sa_family; 720 #ifdef IFAREF_DEBUG 721 printf("if_detach: ifaddr %p, family %d, refcnt %d\n", 722 ifa, family, ifa->ifa_refcnt); 723 if (last_ifa != NULL && ifa == last_ifa) 724 panic("if_detach: loop detected"); 725 last_ifa = ifa; 726 #endif 727 if (family == AF_LINK) 728 continue; 729 dp = pffinddomain(family); 730 #ifdef DIAGNOSTIC 731 if (dp == NULL) 732 panic("if_detach: no domain for AF %d", 733 family); 734 #endif 735 /* 736 * XXX These PURGEIF calls are redundant with the 737 * purge-all-families calls below, but are left in for 738 * now both to make a smaller change, and to avoid 739 * unplanned interactions with clearing of 740 * ifp->if_addrlist. 741 */ 742 purged = 0; 743 for (pr = dp->dom_protosw; 744 pr < dp->dom_protoswNPROTOSW; pr++) { 745 so.so_proto = pr; 746 if (pr->pr_usrreq != NULL) { 747 (void) (*pr->pr_usrreq)(&so, 748 PRU_PURGEIF, NULL, NULL, 749 (struct mbuf *) ifp, curlwp); 750 purged = 1; 751 } 752 } 753 if (purged == 0) { 754 /* 755 * XXX What's really the best thing to do 756 * XXX here? --thorpej (at) NetBSD.org 757 */ 758 printf("if_detach: WARNING: AF %d not purged\n", 759 family); 760 ifa_remove(ifp, ifa); 761 } 762 goto again; 763 } 764 765 if_free_sadl(ifp); 766 767 /* Walk the routing table looking for stragglers. */ 768 for (i = 0; i <= AF_MAX; i++) 769 (void)rt_walktree(i, if_rt_walktree, ifp); 770 771 DOMAIN_FOREACH(dp) { 772 if (dp->dom_ifdetach != NULL && ifp->if_afdata[dp->dom_family]) 773 (*dp->dom_ifdetach)(ifp, 774 ifp->if_afdata[dp->dom_family]); 775 776 /* 777 * One would expect multicast memberships (INET and 778 * INET6) on UDP sockets to be purged by the PURGEIF 779 * calls above, but if all addresses were removed from 780 * the interface prior to destruction, the calls will 781 * not be made (e.g. ppp, for which pppd(8) generally 782 * removes addresses before destroying the interface). 783 * Because there is no invariant that multicast 784 * memberships only exist for interfaces with IPv4 785 * addresses, we must call PURGEIF regardless of 786 * addresses. (Protocols which might store ifnet 787 * pointers are marked with PR_PURGEIF.) 788 */ 789 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 790 so.so_proto = pr; 791 if (pr->pr_usrreq != NULL && pr->pr_flags & PR_PURGEIF) 792 (void)(*pr->pr_usrreq)(&so, PRU_PURGEIF, NULL, 793 NULL, (struct mbuf *)ifp, curlwp); 794 } 795 } 796 797 #ifdef PFIL_HOOKS 798 (void)pfil_run_hooks(&if_pfil, 799 (struct mbuf **)PFIL_IFNET_DETACH, ifp, PFIL_IFNET); 800 (void)pfil_head_unregister(&ifp->if_pfil); 801 #endif 802 803 /* Announce that the interface is gone. */ 804 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 805 806 ifindex2ifnet[ifp->if_index] = NULL; 807 808 TAILQ_REMOVE(&ifnet, ifp, if_list); 809 810 /* 811 * remove packets that came from ifp, from software interrupt queues. 812 */ 813 DOMAIN_FOREACH(dp) { 814 for (i = 0; i < __arraycount(dp->dom_ifqueues); i++) { 815 if (dp->dom_ifqueues[i] == NULL) 816 break; 817 if_detach_queues(ifp, dp->dom_ifqueues[i]); 818 } 819 } 820 821 splx(s); 822 } 823 824 static void 825 if_detach_queues(struct ifnet *ifp, struct ifqueue *q) 826 { 827 struct mbuf *m, *prev, *next; 828 829 prev = NULL; 830 for (m = q->ifq_head; m != NULL; m = next) { 831 next = m->m_nextpkt; 832 #ifdef DIAGNOSTIC 833 if ((m->m_flags & M_PKTHDR) == 0) { 834 prev = m; 835 continue; 836 } 837 #endif 838 if (m->m_pkthdr.rcvif != ifp) { 839 prev = m; 840 continue; 841 } 842 843 if (prev != NULL) 844 prev->m_nextpkt = m->m_nextpkt; 845 else 846 q->ifq_head = m->m_nextpkt; 847 if (q->ifq_tail == m) 848 q->ifq_tail = prev; 849 q->ifq_len--; 850 851 m->m_nextpkt = NULL; 852 m_freem(m); 853 IF_DROP(q); 854 } 855 } 856 857 /* 858 * Callback for a radix tree walk to delete all references to an 859 * ifnet. 860 */ 861 static int 862 if_rt_walktree(struct rtentry *rt, void *v) 863 { 864 struct ifnet *ifp = (struct ifnet *)v; 865 int error; 866 867 if (rt->rt_ifp != ifp) 868 return 0; 869 870 /* Delete the entry. */ 871 ++rt->rt_refcnt; 872 error = rtrequest(RTM_DELETE, rt_getkey(rt), rt->rt_gateway, 873 rt_mask(rt), rt->rt_flags, NULL); 874 KASSERT((rt->rt_flags & RTF_UP) == 0); 875 rt->rt_ifp = NULL; 876 RTFREE(rt); 877 if (error != 0) 878 printf("%s: warning: unable to delete rtentry @ %p, " 879 "error = %d\n", ifp->if_xname, rt, error); 880 return 0; 881 } 882 883 /* 884 * Create a clone network interface. 885 */ 886 int 887 if_clone_create(const char *name) 888 { 889 struct if_clone *ifc; 890 int unit; 891 892 ifc = if_clone_lookup(name, &unit); 893 if (ifc == NULL) 894 return EINVAL; 895 896 if (ifunit(name) != NULL) 897 return EEXIST; 898 899 return (*ifc->ifc_create)(ifc, unit); 900 } 901 902 /* 903 * Destroy a clone network interface. 904 */ 905 int 906 if_clone_destroy(const char *name) 907 { 908 struct if_clone *ifc; 909 struct ifnet *ifp; 910 911 ifc = if_clone_lookup(name, NULL); 912 if (ifc == NULL) 913 return EINVAL; 914 915 ifp = ifunit(name); 916 if (ifp == NULL) 917 return ENXIO; 918 919 if (ifc->ifc_destroy == NULL) 920 return EOPNOTSUPP; 921 922 return (*ifc->ifc_destroy)(ifp); 923 } 924 925 /* 926 * Look up a network interface cloner. 927 */ 928 static struct if_clone * 929 if_clone_lookup(const char *name, int *unitp) 930 { 931 struct if_clone *ifc; 932 const char *cp; 933 int unit; 934 935 /* separate interface name from unit */ 936 for (cp = name; 937 cp - name < IFNAMSIZ && *cp && (*cp < '0' || *cp > '9'); 938 cp++) 939 continue; 940 941 if (cp == name || cp - name == IFNAMSIZ || !*cp) 942 return NULL; /* No name or unit number */ 943 944 LIST_FOREACH(ifc, &if_cloners, ifc_list) { 945 if (strlen(ifc->ifc_name) == cp - name && 946 strncmp(name, ifc->ifc_name, cp - name) == 0) 947 break; 948 } 949 950 if (ifc == NULL) 951 return NULL; 952 953 unit = 0; 954 while (cp - name < IFNAMSIZ && *cp) { 955 if (*cp < '0' || *cp > '9' || unit > INT_MAX / 10) { 956 /* Bogus unit number. */ 957 return NULL; 958 } 959 unit = (unit * 10) + (*cp++ - '0'); 960 } 961 962 if (unitp != NULL) 963 *unitp = unit; 964 return ifc; 965 } 966 967 /* 968 * Register a network interface cloner. 969 */ 970 void 971 if_clone_attach(struct if_clone *ifc) 972 { 973 974 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list); 975 if_cloners_count++; 976 } 977 978 /* 979 * Unregister a network interface cloner. 980 */ 981 void 982 if_clone_detach(struct if_clone *ifc) 983 { 984 985 LIST_REMOVE(ifc, ifc_list); 986 if_cloners_count--; 987 } 988 989 /* 990 * Provide list of interface cloners to userspace. 991 */ 992 static int 993 if_clone_list(struct if_clonereq *ifcr) 994 { 995 char outbuf[IFNAMSIZ], *dst; 996 struct if_clone *ifc; 997 int count, error = 0; 998 999 ifcr->ifcr_total = if_cloners_count; 1000 if ((dst = ifcr->ifcr_buffer) == NULL) { 1001 /* Just asking how many there are. */ 1002 return 0; 1003 } 1004 1005 if (ifcr->ifcr_count < 0) 1006 return EINVAL; 1007 1008 count = (if_cloners_count < ifcr->ifcr_count) ? 1009 if_cloners_count : ifcr->ifcr_count; 1010 1011 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0; 1012 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) { 1013 (void)strncpy(outbuf, ifc->ifc_name, sizeof(outbuf)); 1014 if (outbuf[sizeof(outbuf) - 1] != '\0') 1015 return ENAMETOOLONG; 1016 error = copyout(outbuf, dst, sizeof(outbuf)); 1017 if (error != 0) 1018 break; 1019 } 1020 1021 return error; 1022 } 1023 1024 void 1025 ifa_insert(struct ifnet *ifp, struct ifaddr *ifa) 1026 { 1027 ifa->ifa_ifp = ifp; 1028 TAILQ_INSERT_TAIL(&ifp->if_addrlist, ifa, ifa_list); 1029 IFAREF(ifa); 1030 } 1031 1032 void 1033 ifa_remove(struct ifnet *ifp, struct ifaddr *ifa) 1034 { 1035 KASSERT(ifa->ifa_ifp == ifp); 1036 TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list); 1037 IFAFREE(ifa); 1038 } 1039 1040 static inline int 1041 equal(const struct sockaddr *sa1, const struct sockaddr *sa2) 1042 { 1043 return sockaddr_cmp(sa1, sa2) == 0; 1044 } 1045 1046 /* 1047 * Locate an interface based on a complete address. 1048 */ 1049 /*ARGSUSED*/ 1050 struct ifaddr * 1051 ifa_ifwithaddr(const struct sockaddr *addr) 1052 { 1053 struct ifnet *ifp; 1054 struct ifaddr *ifa; 1055 1056 IFNET_FOREACH(ifp) { 1057 if (ifp->if_output == if_nulloutput) 1058 continue; 1059 IFADDR_FOREACH(ifa, ifp) { 1060 if (ifa->ifa_addr->sa_family != addr->sa_family) 1061 continue; 1062 if (equal(addr, ifa->ifa_addr)) 1063 return ifa; 1064 if ((ifp->if_flags & IFF_BROADCAST) && 1065 ifa->ifa_broadaddr && 1066 /* IP6 doesn't have broadcast */ 1067 ifa->ifa_broadaddr->sa_len != 0 && 1068 equal(ifa->ifa_broadaddr, addr)) 1069 return ifa; 1070 } 1071 } 1072 return NULL; 1073 } 1074 1075 /* 1076 * Locate the point to point interface with a given destination address. 1077 */ 1078 /*ARGSUSED*/ 1079 struct ifaddr * 1080 ifa_ifwithdstaddr(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 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1089 continue; 1090 IFADDR_FOREACH(ifa, ifp) { 1091 if (ifa->ifa_addr->sa_family != addr->sa_family || 1092 ifa->ifa_dstaddr == NULL) 1093 continue; 1094 if (equal(addr, ifa->ifa_dstaddr)) 1095 return ifa; 1096 } 1097 } 1098 return NULL; 1099 } 1100 1101 /* 1102 * Find an interface on a specific network. If many, choice 1103 * is most specific found. 1104 */ 1105 struct ifaddr * 1106 ifa_ifwithnet(const struct sockaddr *addr) 1107 { 1108 struct ifnet *ifp; 1109 struct ifaddr *ifa; 1110 const struct sockaddr_dl *sdl; 1111 struct ifaddr *ifa_maybe = 0; 1112 u_int af = addr->sa_family; 1113 const char *addr_data = addr->sa_data, *cplim; 1114 1115 if (af == AF_LINK) { 1116 sdl = satocsdl(addr); 1117 if (sdl->sdl_index && sdl->sdl_index < if_indexlim && 1118 ifindex2ifnet[sdl->sdl_index] && 1119 ifindex2ifnet[sdl->sdl_index]->if_output != if_nulloutput) 1120 return ifnet_addrs[sdl->sdl_index]; 1121 } 1122 #ifdef NETATALK 1123 if (af == AF_APPLETALK) { 1124 const struct sockaddr_at *sat, *sat2; 1125 sat = (const struct sockaddr_at *)addr; 1126 IFNET_FOREACH(ifp) { 1127 if (ifp->if_output == if_nulloutput) 1128 continue; 1129 ifa = at_ifawithnet((const struct sockaddr_at *)addr, ifp); 1130 if (ifa == NULL) 1131 continue; 1132 sat2 = (struct sockaddr_at *)ifa->ifa_addr; 1133 if (sat2->sat_addr.s_net == sat->sat_addr.s_net) 1134 return ifa; /* exact match */ 1135 if (ifa_maybe == NULL) { 1136 /* else keep the if with the right range */ 1137 ifa_maybe = ifa; 1138 } 1139 } 1140 return ifa_maybe; 1141 } 1142 #endif 1143 IFNET_FOREACH(ifp) { 1144 if (ifp->if_output == if_nulloutput) 1145 continue; 1146 IFADDR_FOREACH(ifa, ifp) { 1147 const char *cp, *cp2, *cp3; 1148 1149 if (ifa->ifa_addr->sa_family != af || 1150 ifa->ifa_netmask == NULL) 1151 next: continue; 1152 cp = addr_data; 1153 cp2 = ifa->ifa_addr->sa_data; 1154 cp3 = ifa->ifa_netmask->sa_data; 1155 cplim = (const char *)ifa->ifa_netmask + 1156 ifa->ifa_netmask->sa_len; 1157 while (cp3 < cplim) { 1158 if ((*cp++ ^ *cp2++) & *cp3++) { 1159 /* want to continue for() loop */ 1160 goto next; 1161 } 1162 } 1163 if (ifa_maybe == NULL || 1164 rn_refines((void *)ifa->ifa_netmask, 1165 (void *)ifa_maybe->ifa_netmask)) 1166 ifa_maybe = ifa; 1167 } 1168 } 1169 return ifa_maybe; 1170 } 1171 1172 /* 1173 * Find the interface of the addresss. 1174 */ 1175 struct ifaddr * 1176 ifa_ifwithladdr(const struct sockaddr *addr) 1177 { 1178 struct ifaddr *ia; 1179 1180 if ((ia = ifa_ifwithaddr(addr)) || (ia = ifa_ifwithdstaddr(addr)) || 1181 (ia = ifa_ifwithnet(addr))) 1182 return ia; 1183 return NULL; 1184 } 1185 1186 /* 1187 * Find an interface using a specific address family 1188 */ 1189 struct ifaddr * 1190 ifa_ifwithaf(int af) 1191 { 1192 struct ifnet *ifp; 1193 struct ifaddr *ifa; 1194 1195 IFNET_FOREACH(ifp) { 1196 if (ifp->if_output == if_nulloutput) 1197 continue; 1198 IFADDR_FOREACH(ifa, ifp) { 1199 if (ifa->ifa_addr->sa_family == af) 1200 return ifa; 1201 } 1202 } 1203 return NULL; 1204 } 1205 1206 /* 1207 * Find an interface address specific to an interface best matching 1208 * a given address. 1209 */ 1210 struct ifaddr * 1211 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp) 1212 { 1213 struct ifaddr *ifa; 1214 const char *cp, *cp2, *cp3; 1215 const char *cplim; 1216 struct ifaddr *ifa_maybe = 0; 1217 u_int af = addr->sa_family; 1218 1219 if (ifp->if_output == if_nulloutput) 1220 return NULL; 1221 1222 if (af >= AF_MAX) 1223 return NULL; 1224 1225 IFADDR_FOREACH(ifa, ifp) { 1226 if (ifa->ifa_addr->sa_family != af) 1227 continue; 1228 ifa_maybe = ifa; 1229 if (ifa->ifa_netmask == NULL) { 1230 if (equal(addr, ifa->ifa_addr) || 1231 (ifa->ifa_dstaddr && 1232 equal(addr, ifa->ifa_dstaddr))) 1233 return ifa; 1234 continue; 1235 } 1236 cp = addr->sa_data; 1237 cp2 = ifa->ifa_addr->sa_data; 1238 cp3 = ifa->ifa_netmask->sa_data; 1239 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1240 for (; cp3 < cplim; cp3++) { 1241 if ((*cp++ ^ *cp2++) & *cp3) 1242 break; 1243 } 1244 if (cp3 == cplim) 1245 return ifa; 1246 } 1247 return ifa_maybe; 1248 } 1249 1250 /* 1251 * Default action when installing a route with a Link Level gateway. 1252 * Lookup an appropriate real ifa to point to. 1253 * This should be moved to /sys/net/link.c eventually. 1254 */ 1255 void 1256 link_rtrequest(int cmd, struct rtentry *rt, const struct rt_addrinfo *info) 1257 { 1258 struct ifaddr *ifa; 1259 const struct sockaddr *dst; 1260 struct ifnet *ifp; 1261 1262 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL || 1263 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_getkey(rt)) == NULL) 1264 return; 1265 if ((ifa = ifaof_ifpforaddr(dst, ifp)) != NULL) { 1266 rt_replace_ifa(rt, ifa); 1267 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1268 ifa->ifa_rtrequest(cmd, rt, info); 1269 } 1270 } 1271 1272 /* 1273 * Handle a change in the interface link state. 1274 */ 1275 void 1276 if_link_state_change(struct ifnet *ifp, int link_state) 1277 { 1278 if (ifp->if_link_state == link_state) 1279 return; 1280 ifp->if_link_state = link_state; 1281 /* Notify that the link state has changed. */ 1282 rt_ifmsg(ifp); 1283 #if NCARP > 0 1284 if (ifp->if_carp) 1285 carp_carpdev_state(ifp); 1286 #endif 1287 } 1288 1289 /* 1290 * Mark an interface down and notify protocols of 1291 * the transition. 1292 * NOTE: must be called at splsoftnet or equivalent. 1293 */ 1294 void 1295 if_down(struct ifnet *ifp) 1296 { 1297 struct ifaddr *ifa; 1298 1299 ifp->if_flags &= ~IFF_UP; 1300 nanotime(&ifp->if_lastchange); 1301 IFADDR_FOREACH(ifa, ifp) 1302 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1303 IFQ_PURGE(&ifp->if_snd); 1304 #if NCARP > 0 1305 if (ifp->if_carp) 1306 carp_carpdev_state(ifp); 1307 #endif 1308 rt_ifmsg(ifp); 1309 } 1310 1311 /* 1312 * Mark an interface up and notify protocols of 1313 * the transition. 1314 * NOTE: must be called at splsoftnet or equivalent. 1315 */ 1316 void 1317 if_up(struct ifnet *ifp) 1318 { 1319 #ifdef notyet 1320 struct ifaddr *ifa; 1321 #endif 1322 1323 ifp->if_flags |= IFF_UP; 1324 nanotime(&ifp->if_lastchange); 1325 #ifdef notyet 1326 /* this has no effect on IP, and will kill all ISO connections XXX */ 1327 IFADDR_FOREACH(ifa, ifp) 1328 pfctlinput(PRC_IFUP, ifa->ifa_addr); 1329 #endif 1330 #if NCARP > 0 1331 if (ifp->if_carp) 1332 carp_carpdev_state(ifp); 1333 #endif 1334 rt_ifmsg(ifp); 1335 #ifdef INET6 1336 in6_if_up(ifp); 1337 #endif 1338 } 1339 1340 /* 1341 * Handle interface watchdog timer routines. Called 1342 * from softclock, we decrement timers (if set) and 1343 * call the appropriate interface routine on expiration. 1344 */ 1345 void 1346 if_slowtimo(void *arg) 1347 { 1348 struct ifnet *ifp; 1349 int s = splnet(); 1350 1351 IFNET_FOREACH(ifp) { 1352 if (ifp->if_timer == 0 || --ifp->if_timer) 1353 continue; 1354 if (ifp->if_watchdog != NULL) 1355 (*ifp->if_watchdog)(ifp); 1356 } 1357 splx(s); 1358 callout_reset(&if_slowtimo_ch, hz / IFNET_SLOWHZ, if_slowtimo, NULL); 1359 } 1360 1361 /* 1362 * Set/clear promiscuous mode on interface ifp based on the truth value 1363 * of pswitch. The calls are reference counted so that only the first 1364 * "on" request actually has an effect, as does the final "off" request. 1365 * Results are undefined if the "off" and "on" requests are not matched. 1366 */ 1367 int 1368 ifpromisc(struct ifnet *ifp, int pswitch) 1369 { 1370 int pcount, ret; 1371 short flags; 1372 struct ifreq ifr; 1373 1374 pcount = ifp->if_pcount; 1375 flags = ifp->if_flags; 1376 if (pswitch) { 1377 /* 1378 * Allow the device to be "placed" into promiscuous 1379 * mode even if it is not configured up. It will 1380 * consult IFF_PROMISC when it is is brought up. 1381 */ 1382 if (ifp->if_pcount++ != 0) 1383 return 0; 1384 ifp->if_flags |= IFF_PROMISC; 1385 if ((ifp->if_flags & IFF_UP) == 0) 1386 return 0; 1387 } else { 1388 if (--ifp->if_pcount > 0) 1389 return 0; 1390 ifp->if_flags &= ~IFF_PROMISC; 1391 /* 1392 * If the device is not configured up, we should not need to 1393 * turn off promiscuous mode (device should have turned it 1394 * off when interface went down; and will look at IFF_PROMISC 1395 * again next time interface comes up). 1396 */ 1397 if ((ifp->if_flags & IFF_UP) == 0) 1398 return 0; 1399 } 1400 memset(&ifr, 0, sizeof(ifr)); 1401 ifr.ifr_flags = ifp->if_flags; 1402 ret = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, &ifr); 1403 /* Restore interface state if not successful. */ 1404 if (ret != 0) { 1405 ifp->if_pcount = pcount; 1406 ifp->if_flags = flags; 1407 } 1408 return ret; 1409 } 1410 1411 /* 1412 * Map interface name to 1413 * interface structure pointer. 1414 */ 1415 struct ifnet * 1416 ifunit(const char *name) 1417 { 1418 struct ifnet *ifp; 1419 const char *cp = name; 1420 u_int unit = 0; 1421 u_int i; 1422 1423 /* 1424 * If the entire name is a number, treat it as an ifindex. 1425 */ 1426 for (i = 0; i < IFNAMSIZ && *cp >= '0' && *cp <= '9'; i++, cp++) { 1427 unit = unit * 10 + (*cp - '0'); 1428 } 1429 1430 /* 1431 * If the number took all of the name, then it's a valid ifindex. 1432 */ 1433 if (i == IFNAMSIZ || (cp != name && *cp == '\0')) { 1434 if (unit >= if_indexlim) 1435 return NULL; 1436 ifp = ifindex2ifnet[unit]; 1437 if (ifp == NULL || ifp->if_output == if_nulloutput) 1438 return NULL; 1439 return ifp; 1440 } 1441 1442 IFNET_FOREACH(ifp) { 1443 if (ifp->if_output == if_nulloutput) 1444 continue; 1445 if (strcmp(ifp->if_xname, name) == 0) 1446 return ifp; 1447 } 1448 return NULL; 1449 } 1450 1451 /* common */ 1452 int 1453 ifioctl_common(struct ifnet *ifp, u_long cmd, void *data) 1454 { 1455 int s; 1456 struct ifreq *ifr; 1457 struct ifcapreq *ifcr; 1458 struct ifdatareq *ifdr; 1459 1460 switch (cmd) { 1461 case SIOCSIFCAP: 1462 ifcr = data; 1463 if ((ifcr->ifcr_capenable & ~ifp->if_capabilities) != 0) 1464 return EINVAL; 1465 1466 if (ifcr->ifcr_capenable == ifp->if_capenable) 1467 return 0; 1468 1469 ifp->if_capenable = ifcr->ifcr_capenable; 1470 1471 /* Pre-compute the checksum flags mask. */ 1472 ifp->if_csum_flags_tx = 0; 1473 ifp->if_csum_flags_rx = 0; 1474 if (ifp->if_capenable & IFCAP_CSUM_IPv4_Tx) { 1475 ifp->if_csum_flags_tx |= M_CSUM_IPv4; 1476 } 1477 if (ifp->if_capenable & IFCAP_CSUM_IPv4_Rx) { 1478 ifp->if_csum_flags_rx |= M_CSUM_IPv4; 1479 } 1480 1481 if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Tx) { 1482 ifp->if_csum_flags_tx |= M_CSUM_TCPv4; 1483 } 1484 if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Rx) { 1485 ifp->if_csum_flags_rx |= M_CSUM_TCPv4; 1486 } 1487 1488 if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Tx) { 1489 ifp->if_csum_flags_tx |= M_CSUM_UDPv4; 1490 } 1491 if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Rx) { 1492 ifp->if_csum_flags_rx |= M_CSUM_UDPv4; 1493 } 1494 1495 if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Tx) { 1496 ifp->if_csum_flags_tx |= M_CSUM_TCPv6; 1497 } 1498 if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Rx) { 1499 ifp->if_csum_flags_rx |= M_CSUM_TCPv6; 1500 } 1501 1502 if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Tx) { 1503 ifp->if_csum_flags_tx |= M_CSUM_UDPv6; 1504 } 1505 if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Rx) { 1506 ifp->if_csum_flags_rx |= M_CSUM_UDPv6; 1507 } 1508 if (ifp->if_flags & IFF_UP) 1509 return ENETRESET; 1510 return 0; 1511 case SIOCSIFFLAGS: 1512 ifr = data; 1513 if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) { 1514 s = splnet(); 1515 if_down(ifp); 1516 splx(s); 1517 } 1518 if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) { 1519 s = splnet(); 1520 if_up(ifp); 1521 splx(s); 1522 } 1523 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 1524 (ifr->ifr_flags &~ IFF_CANTCHANGE); 1525 break; 1526 case SIOCGIFFLAGS: 1527 ifr = data; 1528 ifr->ifr_flags = ifp->if_flags; 1529 break; 1530 1531 case SIOCGIFMETRIC: 1532 ifr = data; 1533 ifr->ifr_metric = ifp->if_metric; 1534 break; 1535 1536 case SIOCGIFMTU: 1537 ifr = data; 1538 ifr->ifr_mtu = ifp->if_mtu; 1539 break; 1540 1541 case SIOCGIFDLT: 1542 ifr = data; 1543 ifr->ifr_dlt = ifp->if_dlt; 1544 break; 1545 1546 case SIOCGIFCAP: 1547 ifcr = data; 1548 ifcr->ifcr_capabilities = ifp->if_capabilities; 1549 ifcr->ifcr_capenable = ifp->if_capenable; 1550 break; 1551 1552 case SIOCSIFMETRIC: 1553 ifr = data; 1554 ifp->if_metric = ifr->ifr_metric; 1555 break; 1556 1557 case SIOCGIFDATA: 1558 ifdr = data; 1559 ifdr->ifdr_data = ifp->if_data; 1560 break; 1561 1562 case SIOCZIFDATA: 1563 ifdr = data; 1564 ifdr->ifdr_data = ifp->if_data; 1565 /* 1566 * Assumes that the volatile counters that can be 1567 * zero'ed are at the end of if_data. 1568 */ 1569 memset(&ifp->if_data.ifi_ipackets, 0, sizeof(ifp->if_data) - 1570 offsetof(struct if_data, ifi_ipackets)); 1571 break; 1572 case SIOCSIFMTU: 1573 ifr = data; 1574 if (ifp->if_mtu == ifr->ifr_mtu) 1575 break; 1576 ifp->if_mtu = ifr->ifr_mtu; 1577 /* 1578 * If the link MTU changed, do network layer specific procedure. 1579 */ 1580 #ifdef INET6 1581 nd6_setmtu(ifp); 1582 #endif 1583 return ENETRESET; 1584 default: 1585 return ENOTTY; 1586 } 1587 return 0; 1588 } 1589 1590 int 1591 ifaddrpref_ioctl(struct socket *so, u_long cmd, void *data, struct ifnet *ifp, 1592 lwp_t *l) 1593 { 1594 struct if_addrprefreq *ifap = (struct if_addrprefreq *)data; 1595 struct ifaddr *ifa; 1596 const struct sockaddr *any, *sa; 1597 union { 1598 struct sockaddr sa; 1599 struct sockaddr_storage ss; 1600 } u, v; 1601 1602 switch (cmd) { 1603 case SIOCSIFADDRPREF: 1604 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_INTERFACE, 1605 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1606 NULL) != 0) 1607 return EPERM; 1608 case SIOCGIFADDRPREF: 1609 break; 1610 default: 1611 return EOPNOTSUPP; 1612 } 1613 1614 /* sanity checks */ 1615 if (data == NULL || ifp == NULL) { 1616 panic("invalid argument to %s", __func__); 1617 /*NOTREACHED*/ 1618 } 1619 1620 /* address must be specified on ADD and DELETE */ 1621 sa = sstocsa(&ifap->ifap_addr); 1622 if (sa->sa_family != sofamily(so)) 1623 return EINVAL; 1624 if ((any = sockaddr_any(sa)) == NULL || sa->sa_len != any->sa_len) 1625 return EINVAL; 1626 1627 sockaddr_externalize(&v.sa, sizeof(v.ss), sa); 1628 1629 IFADDR_FOREACH(ifa, ifp) { 1630 if (ifa->ifa_addr->sa_family != sa->sa_family) 1631 continue; 1632 sockaddr_externalize(&u.sa, sizeof(u.ss), ifa->ifa_addr); 1633 if (sockaddr_cmp(&u.sa, &v.sa) == 0) 1634 break; 1635 } 1636 if (ifa == NULL) 1637 return EADDRNOTAVAIL; 1638 1639 switch (cmd) { 1640 case SIOCSIFADDRPREF: 1641 ifa->ifa_preference = ifap->ifap_preference; 1642 return 0; 1643 case SIOCGIFADDRPREF: 1644 /* fill in the if_laddrreq structure */ 1645 (void)sockaddr_copy(sstosa(&ifap->ifap_addr), 1646 sizeof(ifap->ifap_addr), ifa->ifa_addr); 1647 ifap->ifap_preference = ifa->ifa_preference; 1648 return 0; 1649 default: 1650 return EOPNOTSUPP; 1651 } 1652 } 1653 1654 /* 1655 * Interface ioctls. 1656 */ 1657 int 1658 ifioctl(struct socket *so, u_long cmd, void *data, struct lwp *l) 1659 { 1660 struct ifnet *ifp; 1661 struct ifreq *ifr; 1662 struct ifcapreq *ifcr; 1663 struct ifdatareq *ifdr; 1664 int error = 0; 1665 #if defined(COMPAT_OSOCK) || defined(COMPAT_OIFREQ) 1666 u_long ocmd = cmd; 1667 #endif 1668 short oif_flags; 1669 #ifdef COMPAT_OIFREQ 1670 struct ifreq ifrb; 1671 struct oifreq *oifr = NULL; 1672 #endif 1673 1674 switch (cmd) { 1675 #ifdef COMPAT_OIFREQ 1676 case OSIOCGIFCONF: 1677 case OOSIOCGIFCONF: 1678 return compat_ifconf(cmd, data); 1679 #endif 1680 #ifdef COMPAT_OIFDATA 1681 case OSIOCGIFDATA: 1682 case OSIOCZIFDATA: 1683 return compat_ifdatareq(l, cmd, data); 1684 #endif 1685 case SIOCGIFCONF: 1686 return ifconf(cmd, data); 1687 case SIOCINITIFADDR: 1688 return EPERM; 1689 } 1690 1691 #ifdef COMPAT_OIFREQ 1692 cmd = compat_cvtcmd(cmd); 1693 if (cmd != ocmd) { 1694 oifr = data; 1695 data = ifr = &ifrb; 1696 ifreqo2n(oifr, ifr); 1697 } else 1698 #endif 1699 ifr = data; 1700 ifcr = data; 1701 ifdr = data; 1702 1703 ifp = ifunit(ifr->ifr_name); 1704 1705 switch (cmd) { 1706 case SIOCIFCREATE: 1707 case SIOCIFDESTROY: 1708 if (l != NULL) { 1709 error = kauth_authorize_network(l->l_cred, 1710 KAUTH_NETWORK_INTERFACE, 1711 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, 1712 (void *)cmd, NULL); 1713 if (error != 0) 1714 return error; 1715 } 1716 return (cmd == SIOCIFCREATE) ? 1717 if_clone_create(ifr->ifr_name) : 1718 if_clone_destroy(ifr->ifr_name); 1719 1720 case SIOCIFGCLONERS: 1721 return if_clone_list((struct if_clonereq *)data); 1722 } 1723 1724 if (ifp == NULL) 1725 return ENXIO; 1726 1727 switch (cmd) { 1728 case SIOCALIFADDR: 1729 case SIOCDLIFADDR: 1730 case SIOCSIFADDRPREF: 1731 case SIOCSIFFLAGS: 1732 case SIOCSIFCAP: 1733 case SIOCSIFMETRIC: 1734 case SIOCZIFDATA: 1735 case SIOCSIFMTU: 1736 case SIOCSIFPHYADDR: 1737 case SIOCDIFPHYADDR: 1738 #ifdef INET6 1739 case SIOCSIFPHYADDR_IN6: 1740 #endif 1741 case SIOCSLIFPHYADDR: 1742 case SIOCADDMULTI: 1743 case SIOCDELMULTI: 1744 case SIOCSIFMEDIA: 1745 case SIOCSDRVSPEC: 1746 case SIOCG80211: 1747 case SIOCS80211: 1748 case SIOCS80211NWID: 1749 case SIOCS80211NWKEY: 1750 case SIOCS80211POWER: 1751 case SIOCS80211BSSID: 1752 case SIOCS80211CHANNEL: 1753 if (l != NULL) { 1754 error = kauth_authorize_network(l->l_cred, 1755 KAUTH_NETWORK_INTERFACE, 1756 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, 1757 (void *)cmd, NULL); 1758 if (error != 0) 1759 return error; 1760 } 1761 } 1762 1763 oif_flags = ifp->if_flags; 1764 1765 error = (*ifp->if_ioctl)(ifp, cmd, data); 1766 if (error != ENOTTY) 1767 ; 1768 else if (so->so_proto == NULL) 1769 return EOPNOTSUPP; 1770 else { 1771 #ifdef COMPAT_OSOCK 1772 error = compat_ifioctl(so, ocmd, cmd, data, l); 1773 #else 1774 error = (*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 1775 (struct mbuf *)cmd, (struct mbuf *)data, 1776 (struct mbuf *)ifp, l); 1777 #endif 1778 } 1779 1780 if (((oif_flags ^ ifp->if_flags) & IFF_UP) != 0) { 1781 #ifdef INET6 1782 if ((ifp->if_flags & IFF_UP) != 0) { 1783 int s = splnet(); 1784 in6_if_up(ifp); 1785 splx(s); 1786 } 1787 #endif 1788 } 1789 #ifdef COMPAT_OIFREQ 1790 if (cmd != ocmd) 1791 ifreqn2o(oifr, ifr); 1792 #endif 1793 1794 return error; 1795 } 1796 1797 /* 1798 * Return interface configuration 1799 * of system. List may be used 1800 * in later ioctl's (above) to get 1801 * other information. 1802 * 1803 * Each record is a struct ifreq. Before the addition of 1804 * sockaddr_storage, the API rule was that sockaddr flavors that did 1805 * not fit would extend beyond the struct ifreq, with the next struct 1806 * ifreq starting sa_len beyond the struct sockaddr. Because the 1807 * union in struct ifreq includes struct sockaddr_storage, every kind 1808 * of sockaddr must fit. Thus, there are no longer any overlength 1809 * records. 1810 * 1811 * Records are added to the user buffer if they fit, and ifc_len is 1812 * adjusted to the length that was written. Thus, the user is only 1813 * assured of getting the complete list if ifc_len on return is at 1814 * least sizeof(struct ifreq) less than it was on entry. 1815 * 1816 * If the user buffer pointer is NULL, this routine copies no data and 1817 * returns the amount of space that would be needed. 1818 * 1819 * Invariants: 1820 * ifrp points to the next part of the user's buffer to be used. If 1821 * ifrp != NULL, space holds the number of bytes remaining that we may 1822 * write at ifrp. Otherwise, space holds the number of bytes that 1823 * would have been written had there been adequate space. 1824 */ 1825 /*ARGSUSED*/ 1826 int 1827 ifconf(u_long cmd, void *data) 1828 { 1829 struct ifconf *ifc = (struct ifconf *)data; 1830 struct ifnet *ifp; 1831 struct ifaddr *ifa; 1832 struct ifreq ifr, *ifrp; 1833 int space, error = 0; 1834 const int sz = (int)sizeof(struct ifreq); 1835 1836 if ((ifrp = ifc->ifc_req) == NULL) 1837 space = 0; 1838 else 1839 space = ifc->ifc_len; 1840 IFNET_FOREACH(ifp) { 1841 (void)strncpy(ifr.ifr_name, ifp->if_xname, 1842 sizeof(ifr.ifr_name)); 1843 if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0') 1844 return ENAMETOOLONG; 1845 if (IFADDR_EMPTY(ifp)) { 1846 /* Interface with no addresses - send zero sockaddr. */ 1847 memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr)); 1848 if (ifrp == NULL) { 1849 space += sz; 1850 continue; 1851 } 1852 if (space >= sz) { 1853 error = copyout(&ifr, ifrp, sz); 1854 if (error != 0) 1855 return error; 1856 ifrp++; 1857 space -= sz; 1858 } 1859 } 1860 1861 IFADDR_FOREACH(ifa, ifp) { 1862 struct sockaddr *sa = ifa->ifa_addr; 1863 /* all sockaddrs must fit in sockaddr_storage */ 1864 KASSERT(sa->sa_len <= sizeof(ifr.ifr_ifru)); 1865 1866 if (ifrp == NULL) { 1867 space += sz; 1868 continue; 1869 } 1870 memcpy(&ifr.ifr_space, sa, sa->sa_len); 1871 if (space >= sz) { 1872 error = copyout(&ifr, ifrp, sz); 1873 if (error != 0) 1874 return (error); 1875 ifrp++; space -= sz; 1876 } 1877 } 1878 } 1879 if (ifrp != NULL) { 1880 KASSERT(0 <= space && space <= ifc->ifc_len); 1881 ifc->ifc_len -= space; 1882 } else { 1883 KASSERT(space >= 0); 1884 ifc->ifc_len = space; 1885 } 1886 return (0); 1887 } 1888 1889 int 1890 ifreq_setaddr(const u_long cmd, struct ifreq *ifr, const struct sockaddr *sa) 1891 { 1892 uint8_t len; 1893 u_long ncmd; 1894 const uint8_t osockspace = sizeof(ifr->ifr_addr); 1895 const uint8_t sockspace = sizeof(ifr->ifr_ifru.ifru_space); 1896 1897 #ifdef INET6 1898 if (cmd == SIOCGIFPSRCADDR_IN6 || cmd == SIOCGIFPDSTADDR_IN6) 1899 len = MIN(sizeof(struct sockaddr_in6), sa->sa_len); 1900 else 1901 #endif /* INET6 */ 1902 if ((ncmd = compat_cvtcmd(cmd)) != cmd) 1903 len = MIN(osockspace, sa->sa_len); 1904 else 1905 len = MIN(sockspace, sa->sa_len); 1906 if (len < sa->sa_len) 1907 return EFBIG; 1908 sockaddr_copy(&ifr->ifr_addr, len, sa); 1909 return 0; 1910 } 1911 1912 /* 1913 * Queue message on interface, and start output if interface 1914 * not yet active. 1915 */ 1916 int 1917 ifq_enqueue(struct ifnet *ifp, struct mbuf *m 1918 ALTQ_COMMA ALTQ_DECL(struct altq_pktattr *pktattr)) 1919 { 1920 int len = m->m_pkthdr.len; 1921 int mflags = m->m_flags; 1922 int s = splnet(); 1923 int error; 1924 1925 IFQ_ENQUEUE(&ifp->if_snd, m, pktattr, error); 1926 if (error != 0) 1927 goto out; 1928 ifp->if_obytes += len; 1929 if (mflags & M_MCAST) 1930 ifp->if_omcasts++; 1931 if ((ifp->if_flags & IFF_OACTIVE) == 0) 1932 (*ifp->if_start)(ifp); 1933 out: 1934 splx(s); 1935 return error; 1936 } 1937 1938 /* 1939 * Queue message on interface, possibly using a second fast queue 1940 */ 1941 int 1942 ifq_enqueue2(struct ifnet *ifp, struct ifqueue *ifq, struct mbuf *m 1943 ALTQ_COMMA ALTQ_DECL(struct altq_pktattr *pktattr)) 1944 { 1945 int error = 0; 1946 1947 if (ifq != NULL 1948 #ifdef ALTQ 1949 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 1950 #endif 1951 ) { 1952 if (IF_QFULL(ifq)) { 1953 IF_DROP(&ifp->if_snd); 1954 m_freem(m); 1955 if (error == 0) 1956 error = ENOBUFS; 1957 } else 1958 IF_ENQUEUE(ifq, m); 1959 } else 1960 IFQ_ENQUEUE(&ifp->if_snd, m, pktattr, error); 1961 if (error != 0) { 1962 ++ifp->if_oerrors; 1963 return error; 1964 } 1965 return 0; 1966 } 1967 1968 1969 static void 1970 sysctl_sndq_setup(struct sysctllog **clog, const char *ifname, 1971 struct ifaltq *ifq) 1972 { 1973 const struct sysctlnode *cnode, *rnode; 1974 1975 if (sysctl_createv(clog, 0, NULL, &rnode, 1976 CTLFLAG_PERMANENT, 1977 CTLTYPE_NODE, "net", NULL, 1978 NULL, 0, NULL, 0, 1979 CTL_NET, CTL_EOL) != 0) 1980 goto bad; 1981 1982 if (sysctl_createv(clog, 0, &rnode, &rnode, 1983 CTLFLAG_PERMANENT, 1984 CTLTYPE_NODE, "interfaces", 1985 SYSCTL_DESCR("Per-interface controls"), 1986 NULL, 0, NULL, 0, 1987 CTL_CREATE, CTL_EOL) != 0) 1988 goto bad; 1989 1990 if (sysctl_createv(clog, 0, &rnode, &rnode, 1991 CTLFLAG_PERMANENT, 1992 CTLTYPE_NODE, ifname, 1993 SYSCTL_DESCR("Interface controls"), 1994 NULL, 0, NULL, 0, 1995 CTL_CREATE, CTL_EOL) != 0) 1996 goto bad; 1997 1998 if (sysctl_createv(clog, 0, &rnode, &rnode, 1999 CTLFLAG_PERMANENT, 2000 CTLTYPE_NODE, "sndq", 2001 SYSCTL_DESCR("Interface output queue controls"), 2002 NULL, 0, NULL, 0, 2003 CTL_CREATE, CTL_EOL) != 0) 2004 goto bad; 2005 2006 if (sysctl_createv(clog, 0, &rnode, &cnode, 2007 CTLFLAG_PERMANENT, 2008 CTLTYPE_INT, "len", 2009 SYSCTL_DESCR("Current output queue length"), 2010 NULL, 0, &ifq->ifq_len, 0, 2011 CTL_CREATE, CTL_EOL) != 0) 2012 goto bad; 2013 2014 if (sysctl_createv(clog, 0, &rnode, &cnode, 2015 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2016 CTLTYPE_INT, "maxlen", 2017 SYSCTL_DESCR("Maximum allowed output queue length"), 2018 NULL, 0, &ifq->ifq_maxlen, 0, 2019 CTL_CREATE, CTL_EOL) != 0) 2020 goto bad; 2021 2022 if (sysctl_createv(clog, 0, &rnode, &cnode, 2023 CTLFLAG_PERMANENT, 2024 CTLTYPE_INT, "drops", 2025 SYSCTL_DESCR("Packets dropped due to full output queue"), 2026 NULL, 0, &ifq->ifq_drops, 0, 2027 CTL_CREATE, CTL_EOL) != 0) 2028 goto bad; 2029 2030 return; 2031 bad: 2032 printf("%s: could not attach sysctl nodes\n", ifname); 2033 return; 2034 } 2035 2036 #if defined(INET) || defined(INET6) 2037 static void 2038 sysctl_net_ifq_setup(struct sysctllog **clog, 2039 int pf, const char *pfname, 2040 int ipn, const char *ipname, 2041 int qid, struct ifqueue *ifq) 2042 { 2043 2044 sysctl_createv(clog, 0, NULL, NULL, 2045 CTLFLAG_PERMANENT, 2046 CTLTYPE_NODE, "net", NULL, 2047 NULL, 0, NULL, 0, 2048 CTL_NET, CTL_EOL); 2049 sysctl_createv(clog, 0, NULL, NULL, 2050 CTLFLAG_PERMANENT, 2051 CTLTYPE_NODE, pfname, NULL, 2052 NULL, 0, NULL, 0, 2053 CTL_NET, pf, CTL_EOL); 2054 sysctl_createv(clog, 0, NULL, NULL, 2055 CTLFLAG_PERMANENT, 2056 CTLTYPE_NODE, ipname, NULL, 2057 NULL, 0, NULL, 0, 2058 CTL_NET, pf, ipn, CTL_EOL); 2059 sysctl_createv(clog, 0, NULL, NULL, 2060 CTLFLAG_PERMANENT, 2061 CTLTYPE_NODE, "ifq", 2062 SYSCTL_DESCR("Protocol input queue controls"), 2063 NULL, 0, NULL, 0, 2064 CTL_NET, pf, ipn, qid, CTL_EOL); 2065 2066 sysctl_createv(clog, 0, NULL, NULL, 2067 CTLFLAG_PERMANENT, 2068 CTLTYPE_INT, "len", 2069 SYSCTL_DESCR("Current input queue length"), 2070 NULL, 0, &ifq->ifq_len, 0, 2071 CTL_NET, pf, ipn, qid, IFQCTL_LEN, CTL_EOL); 2072 sysctl_createv(clog, 0, NULL, NULL, 2073 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2074 CTLTYPE_INT, "maxlen", 2075 SYSCTL_DESCR("Maximum allowed input queue length"), 2076 NULL, 0, &ifq->ifq_maxlen, 0, 2077 CTL_NET, pf, ipn, qid, IFQCTL_MAXLEN, CTL_EOL); 2078 #ifdef notyet 2079 sysctl_createv(clog, 0, NULL, NULL, 2080 CTLFLAG_PERMANENT, 2081 CTLTYPE_INT, "peak", 2082 SYSCTL_DESCR("Highest input queue length"), 2083 NULL, 0, &ifq->ifq_peak, 0, 2084 CTL_NET, pf, ipn, qid, IFQCTL_PEAK, CTL_EOL); 2085 #endif 2086 sysctl_createv(clog, 0, NULL, NULL, 2087 CTLFLAG_PERMANENT, 2088 CTLTYPE_INT, "drops", 2089 SYSCTL_DESCR("Packets dropped due to full input queue"), 2090 NULL, 0, &ifq->ifq_drops, 0, 2091 CTL_NET, pf, ipn, qid, IFQCTL_DROPS, CTL_EOL); 2092 } 2093 #endif /* INET || INET6 */ 2094
Indexes created Tue Sep 23 01:09:51 GMT 2025