1 /* $OpenBSD: if.c,v 1.173 2008/06/12 16:15:05 claudio Exp $ */ 2 /* $NetBSD: if.c,v 1.35 1996/05/07 05:26:04 thorpej Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1980, 1986, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)if.c 8.3 (Berkeley) 1/4/94 62 */ 63 64 #include "bluetooth.h" 65 #include "bpfilter.h" 66 #include "bridge.h" 67 #include "carp.h" 68 #include "pf.h" 69 #include "trunk.h" 70 71 #include <sys/param.h> 72 #include <sys/systm.h> 73 #include <sys/mbuf.h> 74 #include <sys/proc.h> 75 #include <sys/socket.h> 76 #include <sys/socketvar.h> 77 #include <sys/protosw.h> 78 #include <sys/kernel.h> 79 #include <sys/ioctl.h> 80 #include <sys/domain.h> 81 #include <sys/sysctl.h> 82 83 #include <net/if.h> 84 #include <net/if_dl.h> 85 #include <net/if_media.h> 86 #include <net/if_types.h> 87 #include <net/route.h> 88 #include <net/netisr.h> 89 90 #ifdef INET 91 #include <netinet/in.h> 92 #include <netinet/in_var.h> 93 #include <netinet/if_ether.h> 94 #include <netinet/igmp.h> 95 #ifdef MROUTING 96 #include <netinet/ip_mroute.h> 97 #endif 98 #endif 99 100 #ifdef INET6 101 #ifndef INET 102 #include <netinet/in.h> 103 #endif 104 #include <netinet6/in6_ifattach.h> 105 #include <netinet6/nd6.h> 106 #endif 107 108 #if NBPFILTER > 0 109 #include <net/bpf.h> 110 #endif 111 112 #if NTRUNK > 0 113 #include <net/if_trunk.h> 114 #endif 115 116 #if NBRIDGE > 0 117 #include <net/if_bridge.h> 118 #endif 119 120 #if NCARP > 0 121 #include <netinet/ip_carp.h> 122 #endif 123 124 #if NPF > 0 125 #include <net/pfvar.h> 126 #endif 127 128 void if_attachsetup(struct ifnet *); 129 void if_attachdomain1(struct ifnet *); 130 131 int ifqmaxlen = IFQ_MAXLEN; 132 133 void if_detach_queues(struct ifnet *, struct ifqueue *); 134 void if_detached_start(struct ifnet *); 135 int if_detached_ioctl(struct ifnet *, u_long, caddr_t); 136 int if_detached_init(struct ifnet *); 137 void if_detached_watchdog(struct ifnet *); 138 139 int if_getgroup(caddr_t, struct ifnet *); 140 int if_getgroupmembers(caddr_t); 141 int if_getgroupattribs(caddr_t); 142 int if_setgroupattribs(caddr_t); 143 144 int if_clone_list(struct if_clonereq *); 145 struct if_clone *if_clone_lookup(const char *, int *); 146 147 void if_congestion_clear(void *); 148 int if_group_egress_build(void); 149 150 TAILQ_HEAD(, ifg_group) ifg_head; 151 LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners); 152 int if_cloners_count; 153 154 /* 155 * Network interface utility routines. 156 * 157 * Routines with ifa_ifwith* names take sockaddr *'s as 158 * parameters. 159 */ 160 void 161 ifinit() 162 { 163 static struct timeout if_slowtim; 164 165 timeout_set(&if_slowtim, if_slowtimo, &if_slowtim); 166 167 if_slowtimo(&if_slowtim); 168 } 169 170 static int if_index = 0; 171 int if_indexlim = 0; 172 struct ifaddr **ifnet_addrs = NULL; 173 struct ifnet **ifindex2ifnet = NULL; 174 struct ifnet_head ifnet; 175 struct ifnet_head iftxlist = TAILQ_HEAD_INITIALIZER(iftxlist); 176 struct ifnet *lo0ifp; 177 178 /* 179 * Attach an interface to the 180 * list of "active" interfaces. 181 */ 182 void 183 if_attachsetup(struct ifnet *ifp) 184 { 185 struct ifaddr *ifa; 186 int wrapped = 0; 187 188 if (ifindex2ifnet == 0) 189 if_index = 1; 190 else { 191 while (if_index < if_indexlim && 192 ifindex2ifnet[if_index] != NULL) { 193 if_index++; 194 /* 195 * If we hit USHRT_MAX, we skip back to 1 since 196 * there are a number of places where the value 197 * of ifp->if_index or if_index itself is compared 198 * to or stored in an unsigned short. By 199 * jumping back, we won't botch those assignments 200 * or comparisons. 201 */ 202 if (if_index == USHRT_MAX) { 203 if_index = 1; 204 /* 205 * However, if we have to jump back to 1 206 * *twice* without finding an empty 207 * slot in ifindex2ifnet[], then there 208 * there are too many (>65535) interfaces. 209 */ 210 if (wrapped++) 211 panic("too many interfaces"); 212 } 213 } 214 } 215 ifp->if_index = if_index; 216 217 /* 218 * We have some arrays that should be indexed by if_index. 219 * since if_index will grow dynamically, they should grow too. 220 * struct ifaddr **ifnet_addrs 221 * struct ifnet **ifindex2ifnet 222 */ 223 if (ifnet_addrs == 0 || ifindex2ifnet == 0 || if_index >= if_indexlim) { 224 size_t m, n, oldlim; 225 caddr_t q; 226 227 oldlim = if_indexlim; 228 if (if_indexlim == 0) 229 if_indexlim = 8; 230 while (if_index >= if_indexlim) 231 if_indexlim <<= 1; 232 233 /* grow ifnet_addrs */ 234 m = oldlim * sizeof(ifa); 235 n = if_indexlim * sizeof(ifa); 236 q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK|M_ZERO); 237 if (ifnet_addrs) { 238 bcopy((caddr_t)ifnet_addrs, q, m); 239 free((caddr_t)ifnet_addrs, M_IFADDR); 240 } 241 ifnet_addrs = (struct ifaddr **)q; 242 243 /* grow ifindex2ifnet */ 244 m = oldlim * sizeof(struct ifnet *); 245 n = if_indexlim * sizeof(struct ifnet *); 246 q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK|M_ZERO); 247 if (ifindex2ifnet) { 248 bcopy((caddr_t)ifindex2ifnet, q, m); 249 free((caddr_t)ifindex2ifnet, M_IFADDR); 250 } 251 ifindex2ifnet = (struct ifnet **)q; 252 } 253 254 TAILQ_INIT(&ifp->if_groups); 255 256 if_addgroup(ifp, IFG_ALL); 257 258 ifindex2ifnet[if_index] = ifp; 259 260 if (ifp->if_snd.ifq_maxlen == 0) 261 ifp->if_snd.ifq_maxlen = ifqmaxlen; 262 #ifdef ALTQ 263 ifp->if_snd.altq_type = 0; 264 ifp->if_snd.altq_disc = NULL; 265 ifp->if_snd.altq_flags &= ALTQF_CANTCHANGE; 266 ifp->if_snd.altq_tbr = NULL; 267 ifp->if_snd.altq_ifp = ifp; 268 #endif 269 270 if (domains) 271 if_attachdomain1(ifp); 272 #if NPF > 0 273 pfi_attach_ifnet(ifp); 274 #endif 275 276 /* Announce the interface. */ 277 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 278 } 279 280 /* 281 * Allocate the link level name for the specified interface. This 282 * is an attachment helper. It must be called after ifp->if_addrlen 283 * is initialized, which may not be the case when if_attach() is 284 * called. 285 */ 286 void 287 if_alloc_sadl(struct ifnet *ifp) 288 { 289 unsigned socksize, ifasize; 290 int namelen, masklen; 291 struct sockaddr_dl *sdl; 292 struct ifaddr *ifa; 293 294 /* 295 * If the interface already has a link name, release it 296 * now. This is useful for interfaces that can change 297 * link types, and thus switch link names often. 298 */ 299 if (ifp->if_sadl != NULL) 300 if_free_sadl(ifp); 301 302 namelen = strlen(ifp->if_xname); 303 #define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m)) 304 masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) + namelen; 305 socksize = masklen + ifp->if_addrlen; 306 #define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1))) 307 if (socksize < sizeof(*sdl)) 308 socksize = sizeof(*sdl); 309 socksize = ROUNDUP(socksize); 310 ifasize = sizeof(*ifa) + 2 * socksize; 311 ifa = malloc(ifasize, M_IFADDR, M_WAITOK|M_ZERO); 312 sdl = (struct sockaddr_dl *)(ifa + 1); 313 sdl->sdl_len = socksize; 314 sdl->sdl_family = AF_LINK; 315 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 316 sdl->sdl_nlen = namelen; 317 sdl->sdl_alen = ifp->if_addrlen; 318 sdl->sdl_index = ifp->if_index; 319 sdl->sdl_type = ifp->if_type; 320 ifnet_addrs[ifp->if_index] = ifa; 321 ifa->ifa_ifp = ifp; 322 ifa->ifa_rtrequest = link_rtrequest; 323 TAILQ_INSERT_HEAD(&ifp->if_addrlist, ifa, ifa_list); 324 ifa->ifa_addr = (struct sockaddr *)sdl; 325 ifp->if_sadl = sdl; 326 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 327 ifa->ifa_netmask = (struct sockaddr *)sdl; 328 sdl->sdl_len = masklen; 329 while (namelen != 0) 330 sdl->sdl_data[--namelen] = 0xff; 331 } 332 333 /* 334 * Free the link level name for the specified interface. This is 335 * a detach helper. This is called from if_detach() or from 336 * link layer type specific detach functions. 337 */ 338 void 339 if_free_sadl(struct ifnet *ifp) 340 { 341 struct ifaddr *ifa; 342 int s; 343 344 ifa = ifnet_addrs[ifp->if_index]; 345 if (ifa == NULL) 346 return; 347 348 s = splnet(); 349 rtinit(ifa, RTM_DELETE, 0); 350 #if 0 351 TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list); 352 ifnet_addrs[ifp->if_index] = NULL; 353 #endif 354 ifp->if_sadl = NULL; 355 356 splx(s); 357 } 358 359 void 360 if_attachdomain() 361 { 362 struct ifnet *ifp; 363 int s; 364 365 s = splnet(); 366 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) 367 if_attachdomain1(ifp); 368 splx(s); 369 } 370 371 void 372 if_attachdomain1(struct ifnet *ifp) 373 { 374 struct domain *dp; 375 int s; 376 377 s = splnet(); 378 379 /* address family dependent data region */ 380 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 381 for (dp = domains; dp; dp = dp->dom_next) { 382 if (dp->dom_ifattach) 383 ifp->if_afdata[dp->dom_family] = 384 (*dp->dom_ifattach)(ifp); 385 } 386 387 splx(s); 388 } 389 390 void 391 if_attachhead(struct ifnet *ifp) 392 { 393 if (if_index == 0) { 394 TAILQ_INIT(&ifnet); 395 TAILQ_INIT(&ifg_head); 396 } 397 TAILQ_INIT(&ifp->if_addrlist); 398 ifp->if_addrhooks = malloc(sizeof(*ifp->if_addrhooks), 399 M_TEMP, M_NOWAIT); 400 if (ifp->if_addrhooks == NULL) 401 panic("if_attachhead: malloc"); 402 TAILQ_INIT(ifp->if_addrhooks); 403 ifp->if_linkstatehooks = malloc(sizeof(*ifp->if_linkstatehooks), 404 M_TEMP, M_NOWAIT); 405 if (ifp->if_linkstatehooks == NULL) 406 panic("if_attachhead: malloc"); 407 TAILQ_INIT(ifp->if_linkstatehooks); 408 ifp->if_detachhooks = malloc(sizeof(*ifp->if_detachhooks), 409 M_TEMP, M_NOWAIT); 410 if (ifp->if_detachhooks == NULL) 411 panic("if_attachhead: malloc"); 412 TAILQ_INIT(ifp->if_detachhooks); 413 TAILQ_INSERT_HEAD(&ifnet, ifp, if_list); 414 if_attachsetup(ifp); 415 } 416 417 void 418 if_attach(struct ifnet *ifp) 419 { 420 #if NCARP > 0 421 struct ifnet *before = NULL; 422 #endif 423 424 if (if_index == 0) { 425 TAILQ_INIT(&ifnet); 426 TAILQ_INIT(&ifg_head); 427 } 428 TAILQ_INIT(&ifp->if_addrlist); 429 ifp->if_addrhooks = malloc(sizeof(*ifp->if_addrhooks), 430 M_TEMP, M_NOWAIT); 431 if (ifp->if_addrhooks == NULL) 432 panic("if_attach: malloc"); 433 TAILQ_INIT(ifp->if_addrhooks); 434 ifp->if_linkstatehooks = malloc(sizeof(*ifp->if_linkstatehooks), 435 M_TEMP, M_NOWAIT); 436 if (ifp->if_linkstatehooks == NULL) 437 panic("if_attach: malloc"); 438 TAILQ_INIT(ifp->if_linkstatehooks); 439 ifp->if_detachhooks = malloc(sizeof(*ifp->if_detachhooks), 440 M_TEMP, M_NOWAIT); 441 if (ifp->if_detachhooks == NULL) 442 panic("if_attach: malloc"); 443 TAILQ_INIT(ifp->if_detachhooks); 444 445 #if NCARP > 0 446 if (ifp->if_type != IFT_CARP) 447 TAILQ_FOREACH(before, &ifnet, if_list) 448 if (before->if_type == IFT_CARP) 449 break; 450 if (before == NULL) 451 TAILQ_INSERT_TAIL(&ifnet, ifp, if_list); 452 else 453 TAILQ_INSERT_BEFORE(before, ifp, if_list); 454 #else 455 TAILQ_INSERT_TAIL(&ifnet, ifp, if_list); 456 #endif 457 458 if_attachsetup(ifp); 459 } 460 461 void 462 if_start(struct ifnet *ifp) 463 { 464 if (IF_QFULL(&ifp->if_snd) && !ISSET(ifp->if_flags, IFF_OACTIVE)) { 465 if (ISSET(ifp->if_xflags, IFXF_TXREADY)) { 466 TAILQ_REMOVE(&iftxlist, ifp, if_txlist); 467 CLR(ifp->if_xflags, IFXF_TXREADY); 468 } 469 ifp->if_start(ifp); 470 return; 471 } 472 473 if (!ISSET(ifp->if_xflags, IFXF_TXREADY)) { 474 SET(ifp->if_xflags, IFXF_TXREADY); 475 TAILQ_INSERT_TAIL(&iftxlist, ifp, if_txlist); 476 schednetisr(NETISR_TX); 477 } 478 } 479 480 void 481 nettxintr(void) 482 { 483 struct ifnet *ifp; 484 int s; 485 486 s = splnet(); 487 while ((ifp = TAILQ_FIRST(&iftxlist)) != NULL) { 488 TAILQ_REMOVE(&iftxlist, ifp, if_txlist); 489 CLR(ifp->if_xflags, IFXF_TXREADY); 490 ifp->if_start(ifp); 491 } 492 splx(s); 493 } 494 495 /* 496 * Detach an interface from everything in the kernel. Also deallocate 497 * private resources. 498 * XXX So far only the INET protocol family has been looked over 499 * wrt resource usage that needs to be decoupled. 500 */ 501 void 502 if_detach(struct ifnet *ifp) 503 { 504 struct ifaddr *ifa; 505 struct ifg_list *ifg; 506 int s = splnet(); 507 struct domain *dp; 508 509 ifp->if_flags &= ~IFF_OACTIVE; 510 ifp->if_start = if_detached_start; 511 ifp->if_ioctl = if_detached_ioctl; 512 ifp->if_init = if_detached_init; 513 ifp->if_watchdog = if_detached_watchdog; 514 515 /* Call detach hooks, ie. to remove vlan interfaces */ 516 dohooks(ifp->if_detachhooks, HOOK_REMOVE | HOOK_FREE); 517 518 #if NTRUNK > 0 519 if (ifp->if_type == IFT_IEEE8023ADLAG) 520 trunk_port_ifdetach(ifp); 521 #endif 522 523 #if NBRIDGE > 0 524 /* Remove the interface from any bridge it is part of. */ 525 if (ifp->if_bridge) 526 bridge_ifdetach(ifp); 527 #endif 528 529 #if NCARP > 0 530 /* Remove the interface from any carp group it is a part of. */ 531 if (ifp->if_carp && ifp->if_type != IFT_CARP) 532 carp_ifdetach(ifp); 533 #endif 534 535 #if NBPFILTER > 0 536 bpfdetach(ifp); 537 #endif 538 #ifdef ALTQ 539 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 540 altq_disable(&ifp->if_snd); 541 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 542 altq_detach(&ifp->if_snd); 543 #endif 544 rt_if_remove(ifp); 545 #ifdef INET 546 rti_delete(ifp); 547 #if NETHER > 0 548 myip_ifp = NULL; 549 #endif 550 #ifdef MROUTING 551 vif_delete(ifp); 552 #endif 553 #endif 554 #ifdef INET6 555 in6_ifdetach(ifp); 556 #endif 557 558 #if NPF > 0 559 pfi_detach_ifnet(ifp); 560 #endif 561 562 /* 563 * remove packets came from ifp, from software interrupt queues. 564 * net/netisr_dispatch.h is not usable, as some of them use 565 * strange queue names. 566 */ 567 #define IF_DETACH_QUEUES(x) \ 568 do { \ 569 extern struct ifqueue x; \ 570 if_detach_queues(ifp, & x); \ 571 } while (0) 572 #ifdef INET 573 IF_DETACH_QUEUES(arpintrq); 574 IF_DETACH_QUEUES(ipintrq); 575 #endif 576 #ifdef INET6 577 IF_DETACH_QUEUES(ip6intrq); 578 #endif 579 #ifdef NETATALK 580 IF_DETACH_QUEUES(atintrq1); 581 IF_DETACH_QUEUES(atintrq2); 582 #endif 583 #ifdef NATM 584 IF_DETACH_QUEUES(natmintrq); 585 #endif 586 #undef IF_DETACH_QUEUES 587 588 /* 589 * XXX transient ifp refs? inpcb.ip_moptions.imo_multicast_ifp? 590 * Other network stacks than INET? 591 */ 592 593 /* Remove the interface from the list of all interfaces. */ 594 TAILQ_REMOVE(&ifnet, ifp, if_list); 595 if (ISSET(ifp->if_xflags, IFXF_TXREADY)) 596 TAILQ_REMOVE(&iftxlist, ifp, if_txlist); 597 598 /* 599 * Deallocate private resources. 600 */ 601 while ((ifa = TAILQ_FIRST(&ifp->if_addrlist)) != NULL) { 602 TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list); 603 #ifdef INET 604 if (ifa->ifa_addr->sa_family == AF_INET) 605 TAILQ_REMOVE(&in_ifaddr, (struct in_ifaddr *)ifa, 606 ia_list); 607 #endif 608 /* XXX if_free_sadl needs this */ 609 if (ifa == ifnet_addrs[ifp->if_index]) 610 continue; 611 612 ifa->ifa_ifp = NULL; 613 IFAFREE(ifa); 614 } 615 616 for (ifg = TAILQ_FIRST(&ifp->if_groups); ifg; 617 ifg = TAILQ_FIRST(&ifp->if_groups)) 618 if_delgroup(ifp, ifg->ifgl_group->ifg_group); 619 620 if_free_sadl(ifp); 621 622 ifnet_addrs[ifp->if_index]->ifa_ifp = NULL; 623 IFAFREE(ifnet_addrs[ifp->if_index]); 624 ifnet_addrs[ifp->if_index] = NULL; 625 626 free(ifp->if_addrhooks, M_TEMP); 627 free(ifp->if_linkstatehooks, M_TEMP); 628 free(ifp->if_detachhooks, M_TEMP); 629 630 for (dp = domains; dp; dp = dp->dom_next) { 631 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 632 (*dp->dom_ifdetach)(ifp, 633 ifp->if_afdata[dp->dom_family]); 634 } 635 636 /* Announce that the interface is gone. */ 637 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 638 639 splx(s); 640 } 641 642 void 643 if_detach_queues(struct ifnet *ifp, struct ifqueue *q) 644 { 645 struct mbuf *m, *prev, *next; 646 647 prev = NULL; 648 for (m = q->ifq_head; m; m = next) { 649 next = m->m_nextpkt; 650 #ifdef DIAGNOSTIC 651 if ((m->m_flags & M_PKTHDR) == 0) { 652 prev = m; 653 continue; 654 } 655 #endif 656 if (m->m_pkthdr.rcvif != ifp) { 657 prev = m; 658 continue; 659 } 660 661 if (prev) 662 prev->m_nextpkt = m->m_nextpkt; 663 else 664 q->ifq_head = m->m_nextpkt; 665 if (q->ifq_tail == m) 666 q->ifq_tail = prev; 667 q->ifq_len--; 668 669 m->m_nextpkt = NULL; 670 m_freem(m); 671 IF_DROP(q); 672 } 673 } 674 675 /* 676 * Create a clone network interface. 677 */ 678 int 679 if_clone_create(const char *name) 680 { 681 struct if_clone *ifc; 682 struct ifnet *ifp; 683 int unit, ret; 684 685 ifc = if_clone_lookup(name, &unit); 686 if (ifc == NULL) 687 return (EINVAL); 688 689 if (ifunit(name) != NULL) 690 return (EEXIST); 691 692 if ((ret = (*ifc->ifc_create)(ifc, unit)) == 0 && 693 (ifp = ifunit(name)) != NULL) 694 if_addgroup(ifp, ifc->ifc_name); 695 696 return (ret); 697 } 698 699 /* 700 * Destroy a clone network interface. 701 */ 702 int 703 if_clone_destroy(const char *name) 704 { 705 struct if_clone *ifc; 706 struct ifnet *ifp; 707 int s, ret; 708 709 ifc = if_clone_lookup(name, NULL); 710 if (ifc == NULL) 711 return (EINVAL); 712 713 ifp = ifunit(name); 714 if (ifp == NULL) 715 return (ENXIO); 716 717 if (ifc->ifc_destroy == NULL) 718 return (EOPNOTSUPP); 719 720 if (ifp->if_flags & IFF_UP) { 721 s = splnet(); 722 if_down(ifp); 723 splx(s); 724 } 725 726 if_delgroup(ifp, ifc->ifc_name); 727 728 if ((ret = (*ifc->ifc_destroy)(ifp)) != 0) 729 if_addgroup(ifp, ifc->ifc_name); 730 731 return (ret); 732 } 733 734 /* 735 * Look up a network interface cloner. 736 */ 737 struct if_clone * 738 if_clone_lookup(const char *name, int *unitp) 739 { 740 struct if_clone *ifc; 741 const char *cp; 742 int unit; 743 744 /* separate interface name from unit */ 745 for (cp = name; 746 cp - name < IFNAMSIZ && *cp && (*cp < '0' || *cp > '9'); 747 cp++) 748 continue; 749 750 if (cp == name || cp - name == IFNAMSIZ || !*cp) 751 return (NULL); /* No name or unit number */ 752 753 if (cp - name < IFNAMSIZ-1 && *cp == '0' && cp[1] != '\0') 754 return (NULL); /* unit number 0 padded */ 755 756 LIST_FOREACH(ifc, &if_cloners, ifc_list) { 757 if (strlen(ifc->ifc_name) == cp - name && 758 !strncmp(name, ifc->ifc_name, cp - name)) 759 break; 760 } 761 762 if (ifc == NULL) 763 return (NULL); 764 765 unit = 0; 766 while (cp - name < IFNAMSIZ && *cp) { 767 if (*cp < '0' || *cp > '9' || 768 unit > (INT_MAX - (*cp - '0')) / 10) { 769 /* Bogus unit number. */ 770 return (NULL); 771 } 772 unit = (unit * 10) + (*cp++ - '0'); 773 } 774 775 if (unitp != NULL) 776 *unitp = unit; 777 return (ifc); 778 } 779 780 /* 781 * Register a network interface cloner. 782 */ 783 void 784 if_clone_attach(struct if_clone *ifc) 785 { 786 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list); 787 if_cloners_count++; 788 } 789 790 /* 791 * Unregister a network interface cloner. 792 */ 793 void 794 if_clone_detach(struct if_clone *ifc) 795 { 796 797 LIST_REMOVE(ifc, ifc_list); 798 if_cloners_count--; 799 } 800 801 /* 802 * Provide list of interface cloners to userspace. 803 */ 804 int 805 if_clone_list(struct if_clonereq *ifcr) 806 { 807 char outbuf[IFNAMSIZ], *dst; 808 struct if_clone *ifc; 809 int count, error = 0; 810 811 ifcr->ifcr_total = if_cloners_count; 812 if ((dst = ifcr->ifcr_buffer) == NULL) { 813 /* Just asking how many there are. */ 814 return (0); 815 } 816 817 if (ifcr->ifcr_count < 0) 818 return (EINVAL); 819 820 count = (if_cloners_count < ifcr->ifcr_count) ? 821 if_cloners_count : ifcr->ifcr_count; 822 823 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0; 824 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) { 825 bzero(outbuf, sizeof outbuf); 826 strlcpy(outbuf, ifc->ifc_name, IFNAMSIZ); 827 error = copyout(outbuf, dst, IFNAMSIZ); 828 if (error) 829 break; 830 } 831 832 return (error); 833 } 834 835 /* 836 * set queue congestion marker and register timeout to clear it 837 */ 838 void 839 if_congestion(struct ifqueue *ifq) 840 { 841 /* Not currently needed, all callers check this */ 842 if (ifq->ifq_congestion) 843 return; 844 845 ifq->ifq_congestion = malloc(sizeof(struct timeout), M_TEMP, M_NOWAIT); 846 if (ifq->ifq_congestion == NULL) 847 return; 848 timeout_set(ifq->ifq_congestion, if_congestion_clear, ifq); 849 timeout_add(ifq->ifq_congestion, hz / 100); 850 } 851 852 /* 853 * clear the congestion flag 854 */ 855 void 856 if_congestion_clear(void *arg) 857 { 858 struct ifqueue *ifq = arg; 859 struct timeout *to = ifq->ifq_congestion; 860 861 ifq->ifq_congestion = NULL; 862 free(to, M_TEMP); 863 } 864 865 /* 866 * Locate an interface based on a complete address. 867 */ 868 /*ARGSUSED*/ 869 struct ifaddr * 870 ifa_ifwithaddr(struct sockaddr *addr) 871 { 872 struct ifnet *ifp; 873 struct ifaddr *ifa; 874 875 #define equal(a1, a2) \ 876 (bcmp((caddr_t)(a1), (caddr_t)(a2), \ 877 ((struct sockaddr *)(a1))->sa_len) == 0) 878 TAILQ_FOREACH(ifp, &ifnet, if_list) { 879 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 880 if (ifa->ifa_addr->sa_family != addr->sa_family) 881 continue; 882 if (equal(addr, ifa->ifa_addr)) 883 return (ifa); 884 if ((ifp->if_flags & IFF_BROADCAST) && ifa->ifa_broadaddr && 885 /* IP6 doesn't have broadcast */ 886 ifa->ifa_broadaddr->sa_len != 0 && 887 equal(ifa->ifa_broadaddr, addr)) 888 return (ifa); 889 } 890 } 891 return (NULL); 892 } 893 /* 894 * Locate the point to point interface with a given destination address. 895 */ 896 /*ARGSUSED*/ 897 struct ifaddr * 898 ifa_ifwithdstaddr(struct sockaddr *addr) 899 { 900 struct ifnet *ifp; 901 struct ifaddr *ifa; 902 903 TAILQ_FOREACH(ifp, &ifnet, if_list) { 904 if (ifp->if_flags & IFF_POINTOPOINT) 905 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 906 if (ifa->ifa_addr->sa_family != addr->sa_family || 907 ifa->ifa_dstaddr == NULL) 908 continue; 909 if (equal(addr, ifa->ifa_dstaddr)) 910 return (ifa); 911 } 912 } 913 return (NULL); 914 } 915 916 /* 917 * Find an interface on a specific network. If many, choice 918 * is most specific found. 919 */ 920 struct ifaddr * 921 ifa_ifwithnet(struct sockaddr *addr) 922 { 923 struct ifnet *ifp; 924 struct ifaddr *ifa; 925 struct ifaddr *ifa_maybe = 0; 926 u_int af = addr->sa_family; 927 char *addr_data = addr->sa_data, *cplim; 928 929 if (af == AF_LINK) { 930 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; 931 if (sdl->sdl_index && sdl->sdl_index < if_indexlim && 932 ifindex2ifnet[sdl->sdl_index]) 933 return (ifnet_addrs[sdl->sdl_index]); 934 } 935 TAILQ_FOREACH(ifp, &ifnet, if_list) { 936 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 937 char *cp, *cp2, *cp3; 938 939 if (ifa->ifa_addr->sa_family != af || 940 ifa->ifa_netmask == 0) 941 next: continue; 942 cp = addr_data; 943 cp2 = ifa->ifa_addr->sa_data; 944 cp3 = ifa->ifa_netmask->sa_data; 945 cplim = (char *)ifa->ifa_netmask + 946 ifa->ifa_netmask->sa_len; 947 while (cp3 < cplim) 948 if ((*cp++ ^ *cp2++) & *cp3++) 949 /* want to continue for() loop */ 950 goto next; 951 if (ifa_maybe == 0 || 952 rn_refines((caddr_t)ifa->ifa_netmask, 953 (caddr_t)ifa_maybe->ifa_netmask)) 954 ifa_maybe = ifa; 955 } 956 } 957 return (ifa_maybe); 958 } 959 960 /* 961 * Find an interface using a specific address family 962 */ 963 struct ifaddr * 964 ifa_ifwithaf(int af) 965 { 966 struct ifnet *ifp; 967 struct ifaddr *ifa; 968 969 TAILQ_FOREACH(ifp, &ifnet, if_list) { 970 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 971 if (ifa->ifa_addr->sa_family == af) 972 return (ifa); 973 } 974 } 975 return (NULL); 976 } 977 978 /* 979 * Find an interface address specific to an interface best matching 980 * a given address. 981 */ 982 struct ifaddr * 983 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp) 984 { 985 struct ifaddr *ifa; 986 char *cp, *cp2, *cp3; 987 char *cplim; 988 struct ifaddr *ifa_maybe = NULL; 989 u_int af = addr->sa_family; 990 991 if (af >= AF_MAX) 992 return (NULL); 993 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 994 if (ifa->ifa_addr->sa_family != af) 995 continue; 996 if (ifa_maybe == NULL) 997 ifa_maybe = ifa; 998 if (ifa->ifa_netmask == 0 || ifp->if_flags & IFF_POINTOPOINT) { 999 if (equal(addr, ifa->ifa_addr) || 1000 (ifa->ifa_dstaddr && equal(addr, ifa->ifa_dstaddr))) 1001 return (ifa); 1002 continue; 1003 } 1004 cp = addr->sa_data; 1005 cp2 = ifa->ifa_addr->sa_data; 1006 cp3 = ifa->ifa_netmask->sa_data; 1007 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1008 for (; cp3 < cplim; cp3++) 1009 if ((*cp++ ^ *cp2++) & *cp3) 1010 break; 1011 if (cp3 == cplim) 1012 return (ifa); 1013 } 1014 return (ifa_maybe); 1015 } 1016 1017 /* 1018 * Default action when installing a route with a Link Level gateway. 1019 * Lookup an appropriate real ifa to point to. 1020 * This should be moved to /sys/net/link.c eventually. 1021 */ 1022 void 1023 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 1024 { 1025 struct ifaddr *ifa; 1026 struct sockaddr *dst; 1027 struct ifnet *ifp; 1028 1029 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) || 1030 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0)) 1031 return; 1032 if ((ifa = ifaof_ifpforaddr(dst, ifp)) != NULL) { 1033 ifa->ifa_refcnt++; 1034 IFAFREE(rt->rt_ifa); 1035 rt->rt_ifa = ifa; 1036 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1037 ifa->ifa_rtrequest(cmd, rt, info); 1038 } 1039 } 1040 1041 /* 1042 * Mark an interface down and notify protocols of 1043 * the transition. 1044 * NOTE: must be called at splsoftnet or equivalent. 1045 */ 1046 void 1047 if_down(struct ifnet *ifp) 1048 { 1049 struct ifaddr *ifa; 1050 1051 splassert(IPL_SOFTNET); 1052 1053 ifp->if_flags &= ~IFF_UP; 1054 microtime(&ifp->if_lastchange); 1055 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 1056 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1057 } 1058 IFQ_PURGE(&ifp->if_snd); 1059 #if NCARP > 0 1060 if (ifp->if_carp) 1061 carp_carpdev_state(ifp); 1062 #endif 1063 #if NBRIDGE > 0 1064 if (ifp->if_bridge) 1065 bstp_ifstate(ifp); 1066 #endif 1067 rt_ifmsg(ifp); 1068 } 1069 1070 /* 1071 * Mark an interface up and notify protocols of 1072 * the transition. 1073 * NOTE: must be called at splsoftnet or equivalent. 1074 */ 1075 void 1076 if_up(struct ifnet *ifp) 1077 { 1078 #ifdef notyet 1079 struct ifaddr *ifa; 1080 #endif 1081 1082 splassert(IPL_SOFTNET); 1083 1084 ifp->if_flags |= IFF_UP; 1085 microtime(&ifp->if_lastchange); 1086 #ifdef notyet 1087 /* this has no effect on IP, and will kill all ISO connections XXX */ 1088 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 1089 pfctlinput(PRC_IFUP, ifa->ifa_addr); 1090 } 1091 #endif 1092 #if NCARP > 0 1093 if (ifp->if_carp) 1094 carp_carpdev_state(ifp); 1095 #endif 1096 #if NBRIDGE > 0 1097 if (ifp->if_bridge) 1098 bstp_ifstate(ifp); 1099 #endif 1100 rt_ifmsg(ifp); 1101 #ifdef INET6 1102 in6_if_up(ifp); 1103 #endif 1104 } 1105 1106 /* 1107 * Process a link state change. 1108 * NOTE: must be called at splsoftnet or equivalent. 1109 */ 1110 void 1111 if_link_state_change(struct ifnet *ifp) 1112 { 1113 rt_ifmsg(ifp); 1114 dohooks(ifp->if_linkstatehooks, 0); 1115 } 1116 1117 /* 1118 * Flush an interface queue. 1119 */ 1120 void 1121 if_qflush(struct ifqueue *ifq) 1122 { 1123 struct mbuf *m, *n; 1124 1125 n = ifq->ifq_head; 1126 while ((m = n) != NULL) { 1127 n = m->m_act; 1128 m_freem(m); 1129 } 1130 ifq->ifq_head = 0; 1131 ifq->ifq_tail = 0; 1132 ifq->ifq_len = 0; 1133 } 1134 1135 /* 1136 * Handle interface watchdog timer routines. Called 1137 * from softclock, we decrement timers (if set) and 1138 * call the appropriate interface routine on expiration. 1139 */ 1140 void 1141 if_slowtimo(void *arg) 1142 { 1143 struct timeout *to = (struct timeout *)arg; 1144 struct ifnet *ifp; 1145 int s = splnet(); 1146 1147 TAILQ_FOREACH(ifp, &ifnet, if_list) { 1148 if (ifp->if_timer == 0 || --ifp->if_timer) 1149 continue; 1150 if (ifp->if_watchdog) 1151 (*ifp->if_watchdog)(ifp); 1152 } 1153 splx(s); 1154 timeout_add(to, hz / IFNET_SLOWHZ); 1155 } 1156 1157 /* 1158 * Map interface name to 1159 * interface structure pointer. 1160 */ 1161 struct ifnet * 1162 ifunit(const char *name) 1163 { 1164 struct ifnet *ifp; 1165 1166 TAILQ_FOREACH(ifp, &ifnet, if_list) { 1167 if (strcmp(ifp->if_xname, name) == 0) 1168 return (ifp); 1169 } 1170 return (NULL); 1171 } 1172 1173 /* 1174 * Interface ioctls. 1175 */ 1176 int 1177 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct proc *p) 1178 { 1179 struct ifnet *ifp; 1180 struct ifreq *ifr; 1181 struct ifaddr *ifa; 1182 struct sockaddr_dl *sdl; 1183 struct ifgroupreq *ifgr; 1184 char ifdescrbuf[IFDESCRSIZE]; 1185 char ifrtlabelbuf[RTLABEL_LEN]; 1186 int error = 0; 1187 size_t bytesdone; 1188 short oif_flags; 1189 const char *label; 1190 1191 switch (cmd) { 1192 1193 case SIOCGIFCONF: 1194 case OSIOCGIFCONF: 1195 return (ifconf(cmd, data)); 1196 } 1197 ifr = (struct ifreq *)data; 1198 1199 switch (cmd) { 1200 case SIOCIFCREATE: 1201 case SIOCIFDESTROY: 1202 if ((error = suser(p, 0)) != 0) 1203 return (error); 1204 return ((cmd == SIOCIFCREATE) ? 1205 if_clone_create(ifr->ifr_name) : 1206 if_clone_destroy(ifr->ifr_name)); 1207 case SIOCIFGCLONERS: 1208 return (if_clone_list((struct if_clonereq *)data)); 1209 case SIOCGIFGMEMB: 1210 return (if_getgroupmembers(data)); 1211 case SIOCGIFGATTR: 1212 return (if_getgroupattribs(data)); 1213 case SIOCSIFGATTR: 1214 if ((error = suser(p, 0)) != 0) 1215 return (error); 1216 return (if_setgroupattribs(data)); 1217 } 1218 1219 ifp = ifunit(ifr->ifr_name); 1220 if (ifp == 0) 1221 return (ENXIO); 1222 oif_flags = ifp->if_flags; 1223 switch (cmd) { 1224 1225 case SIOCGIFFLAGS: 1226 ifr->ifr_flags = ifp->if_flags; 1227 break; 1228 1229 case SIOCGIFMETRIC: 1230 ifr->ifr_metric = ifp->if_metric; 1231 break; 1232 1233 case SIOCGIFMTU: 1234 ifr->ifr_mtu = ifp->if_mtu; 1235 break; 1236 1237 case SIOCGIFDATA: 1238 error = copyout((caddr_t)&ifp->if_data, ifr->ifr_data, 1239 sizeof(ifp->if_data)); 1240 break; 1241 1242 case SIOCSIFFLAGS: 1243 if ((error = suser(p, 0)) != 0) 1244 return (error); 1245 if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) { 1246 int s = splnet(); 1247 if_down(ifp); 1248 splx(s); 1249 } 1250 if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) { 1251 int s = splnet(); 1252 if_up(ifp); 1253 splx(s); 1254 } 1255 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 1256 (ifr->ifr_flags &~ IFF_CANTCHANGE); 1257 if (ifp->if_ioctl) 1258 (void) (*ifp->if_ioctl)(ifp, cmd, data); 1259 break; 1260 1261 case SIOCSIFMETRIC: 1262 if ((error = suser(p, 0)) != 0) 1263 return (error); 1264 ifp->if_metric = ifr->ifr_metric; 1265 break; 1266 1267 case SIOCSIFMTU: 1268 { 1269 #ifdef INET6 1270 int oldmtu = ifp->if_mtu; 1271 #endif 1272 1273 if ((error = suser(p, 0)) != 0) 1274 return (error); 1275 if (ifp->if_ioctl == NULL) 1276 return (EOPNOTSUPP); 1277 error = (*ifp->if_ioctl)(ifp, cmd, data); 1278 1279 /* 1280 * If the link MTU changed, do network layer specific procedure. 1281 */ 1282 #ifdef INET6 1283 if (ifp->if_mtu != oldmtu) 1284 nd6_setmtu(ifp); 1285 #endif 1286 break; 1287 } 1288 1289 case SIOCSIFPHYADDR: 1290 case SIOCDIFPHYADDR: 1291 #ifdef INET6 1292 case SIOCSIFPHYADDR_IN6: 1293 #endif 1294 case SIOCSLIFPHYADDR: 1295 case SIOCADDMULTI: 1296 case SIOCDELMULTI: 1297 case SIOCSIFMEDIA: 1298 if ((error = suser(p, 0)) != 0) 1299 return (error); 1300 /* FALLTHROUGH */ 1301 case SIOCGIFPSRCADDR: 1302 case SIOCGIFPDSTADDR: 1303 case SIOCGLIFPHYADDR: 1304 case SIOCGIFMEDIA: 1305 if (ifp->if_ioctl == 0) 1306 return (EOPNOTSUPP); 1307 error = (*ifp->if_ioctl)(ifp, cmd, data); 1308 break; 1309 1310 case SIOCGIFDESCR: 1311 strlcpy(ifdescrbuf, ifp->if_description, IFDESCRSIZE); 1312 error = copyoutstr(ifdescrbuf, ifr->ifr_data, IFDESCRSIZE, 1313 &bytesdone); 1314 break; 1315 1316 case SIOCSIFDESCR: 1317 if ((error = suser(p, 0)) != 0) 1318 return (error); 1319 error = copyinstr(ifr->ifr_data, ifdescrbuf, 1320 IFDESCRSIZE, &bytesdone); 1321 if (error == 0) { 1322 (void)memset(ifp->if_description, 0, IFDESCRSIZE); 1323 strlcpy(ifp->if_description, ifdescrbuf, IFDESCRSIZE); 1324 } 1325 break; 1326 1327 case SIOCGIFRTLABEL: 1328 if (ifp->if_rtlabelid && 1329 (label = rtlabel_id2name(ifp->if_rtlabelid)) != NULL) { 1330 strlcpy(ifrtlabelbuf, label, RTLABEL_LEN); 1331 error = copyoutstr(ifrtlabelbuf, ifr->ifr_data, 1332 RTLABEL_LEN, &bytesdone); 1333 } else 1334 error = ENOENT; 1335 break; 1336 1337 case SIOCSIFRTLABEL: 1338 if ((error = suser(p, 0)) != 0) 1339 return (error); 1340 error = copyinstr(ifr->ifr_data, ifrtlabelbuf, 1341 RTLABEL_LEN, &bytesdone); 1342 if (error == 0) { 1343 rtlabel_unref(ifp->if_rtlabelid); 1344 ifp->if_rtlabelid = rtlabel_name2id(ifrtlabelbuf); 1345 } 1346 break; 1347 1348 case SIOCAIFGROUP: 1349 if ((error = suser(p, 0))) 1350 return (error); 1351 (*ifp->if_ioctl)(ifp, cmd, data); /* XXX error check */ 1352 ifgr = (struct ifgroupreq *)data; 1353 if ((error = if_addgroup(ifp, ifgr->ifgr_group))) 1354 return (error); 1355 break; 1356 1357 case SIOCGIFGROUP: 1358 if ((error = if_getgroup(data, ifp))) 1359 return (error); 1360 break; 1361 1362 case SIOCDIFGROUP: 1363 if ((error = suser(p, 0))) 1364 return (error); 1365 (*ifp->if_ioctl)(ifp, cmd, data); /* XXX error check */ 1366 ifgr = (struct ifgroupreq *)data; 1367 if ((error = if_delgroup(ifp, ifgr->ifgr_group))) 1368 return (error); 1369 break; 1370 1371 case SIOCSIFLLADDR: 1372 if ((error = suser(p, 0))) 1373 return (error); 1374 ifa = ifnet_addrs[ifp->if_index]; 1375 if (ifa == NULL) 1376 return (EINVAL); 1377 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 1378 if (sdl == NULL) 1379 return (EINVAL); 1380 if (ifr->ifr_addr.sa_len != ETHER_ADDR_LEN) 1381 return (EINVAL); 1382 if (ETHER_IS_MULTICAST(ifr->ifr_addr.sa_data)) 1383 return (EINVAL); 1384 switch (ifp->if_type) { 1385 case IFT_ETHER: 1386 case IFT_CARP: 1387 case IFT_FDDI: 1388 case IFT_XETHER: 1389 case IFT_ISO88025: 1390 case IFT_L2VLAN: 1391 bcopy((caddr_t)ifr->ifr_addr.sa_data, 1392 (caddr_t)((struct arpcom *)ifp)->ac_enaddr, 1393 ETHER_ADDR_LEN); 1394 bcopy((caddr_t)ifr->ifr_addr.sa_data, 1395 LLADDR(sdl), ETHER_ADDR_LEN); 1396 break; 1397 default: 1398 return (ENODEV); 1399 } 1400 if (ifp->if_flags & IFF_UP) { 1401 struct ifreq ifrq; 1402 int s = splnet(); 1403 ifp->if_flags &= ~IFF_UP; 1404 ifrq.ifr_flags = ifp->if_flags; 1405 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifrq); 1406 ifp->if_flags |= IFF_UP; 1407 ifrq.ifr_flags = ifp->if_flags; 1408 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifrq); 1409 splx(s); 1410 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 1411 if (ifa->ifa_addr != NULL && 1412 ifa->ifa_addr->sa_family == AF_INET) 1413 arp_ifinit((struct arpcom *)ifp, ifa); 1414 } 1415 } 1416 break; 1417 1418 default: 1419 if (so->so_proto == 0) 1420 return (EOPNOTSUPP); 1421 #if !defined(COMPAT_43) && !defined(COMPAT_LINUX) && !defined(COMPAT_SVR4) 1422 error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 1423 (struct mbuf *) cmd, (struct mbuf *) data, 1424 (struct mbuf *) ifp, p)); 1425 #else 1426 { 1427 u_long ocmd = cmd; 1428 1429 switch (cmd) { 1430 1431 case SIOCSIFADDR: 1432 case SIOCSIFDSTADDR: 1433 case SIOCSIFBRDADDR: 1434 case SIOCSIFNETMASK: 1435 #if BYTE_ORDER != BIG_ENDIAN 1436 if (ifr->ifr_addr.sa_family == 0 && 1437 ifr->ifr_addr.sa_len < 16) { 1438 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len; 1439 ifr->ifr_addr.sa_len = 16; 1440 } 1441 #else 1442 if (ifr->ifr_addr.sa_len == 0) 1443 ifr->ifr_addr.sa_len = 16; 1444 #endif 1445 break; 1446 1447 case OSIOCGIFADDR: 1448 cmd = SIOCGIFADDR; 1449 break; 1450 1451 case OSIOCGIFDSTADDR: 1452 cmd = SIOCGIFDSTADDR; 1453 break; 1454 1455 case OSIOCGIFBRDADDR: 1456 cmd = SIOCGIFBRDADDR; 1457 break; 1458 1459 case OSIOCGIFNETMASK: 1460 cmd = SIOCGIFNETMASK; 1461 } 1462 error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 1463 (struct mbuf *) cmd, (struct mbuf *) data, 1464 (struct mbuf *) ifp, p)); 1465 switch (ocmd) { 1466 1467 case OSIOCGIFADDR: 1468 case OSIOCGIFDSTADDR: 1469 case OSIOCGIFBRDADDR: 1470 case OSIOCGIFNETMASK: 1471 *(u_int16_t *)&ifr->ifr_addr = ifr->ifr_addr.sa_family; 1472 } 1473 1474 } 1475 #endif 1476 break; 1477 } 1478 1479 if (((oif_flags ^ ifp->if_flags) & IFF_UP) != 0) { 1480 microtime(&ifp->if_lastchange); 1481 #ifdef INET6 1482 if ((ifp->if_flags & IFF_UP) != 0) { 1483 int s = splnet(); 1484 in6_if_up(ifp); 1485 splx(s); 1486 } 1487 #endif 1488 } 1489 return (error); 1490 } 1491 1492 /* 1493 * Return interface configuration 1494 * of system. List may be used 1495 * in later ioctl's (above) to get 1496 * other information. 1497 */ 1498 /*ARGSUSED*/ 1499 int 1500 ifconf(u_long cmd, caddr_t data) 1501 { 1502 struct ifconf *ifc = (struct ifconf *)data; 1503 struct ifnet *ifp; 1504 struct ifaddr *ifa; 1505 struct ifreq ifr, *ifrp; 1506 int space = ifc->ifc_len, error = 0; 1507 1508 /* If ifc->ifc_len is 0, fill it in with the needed size and return. */ 1509 if (space == 0) { 1510 TAILQ_FOREACH(ifp, &ifnet, if_list) { 1511 struct sockaddr *sa; 1512 1513 if (TAILQ_EMPTY(&ifp->if_addrlist)) 1514 space += sizeof (ifr); 1515 else 1516 TAILQ_FOREACH(ifa, 1517 &ifp->if_addrlist, ifa_list) { 1518 sa = ifa->ifa_addr; 1519 #if defined(COMPAT_43) || defined(COMPAT_LINUX) || defined(COMPAT_SVR4) 1520 if (cmd != OSIOCGIFCONF) 1521 #endif 1522 if (sa->sa_len > sizeof(*sa)) 1523 space += sa->sa_len - 1524 sizeof(*sa); 1525 space += sizeof(ifr); 1526 } 1527 } 1528 ifc->ifc_len = space; 1529 return (0); 1530 } 1531 1532 ifrp = ifc->ifc_req; 1533 for (ifp = TAILQ_FIRST(&ifnet); space >= sizeof(ifr) && 1534 ifp != TAILQ_END(&ifnet); ifp = TAILQ_NEXT(ifp, if_list)) { 1535 bcopy(ifp->if_xname, ifr.ifr_name, IFNAMSIZ); 1536 if (TAILQ_EMPTY(&ifp->if_addrlist)) { 1537 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr)); 1538 error = copyout((caddr_t)&ifr, (caddr_t)ifrp, 1539 sizeof(ifr)); 1540 if (error) 1541 break; 1542 space -= sizeof (ifr), ifrp++; 1543 } else 1544 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); 1545 space >= sizeof (ifr) && 1546 ifa != TAILQ_END(&ifp->if_addrlist); 1547 ifa = TAILQ_NEXT(ifa, ifa_list)) { 1548 struct sockaddr *sa = ifa->ifa_addr; 1549 #if defined(COMPAT_43) || defined(COMPAT_LINUX) || defined(COMPAT_SVR4) 1550 if (cmd == OSIOCGIFCONF) { 1551 struct osockaddr *osa = 1552 (struct osockaddr *)&ifr.ifr_addr; 1553 ifr.ifr_addr = *sa; 1554 osa->sa_family = sa->sa_family; 1555 error = copyout((caddr_t)&ifr, 1556 (caddr_t)ifrp, sizeof (ifr)); 1557 ifrp++; 1558 } else 1559 #endif 1560 if (sa->sa_len <= sizeof(*sa)) { 1561 ifr.ifr_addr = *sa; 1562 error = copyout((caddr_t)&ifr, 1563 (caddr_t)ifrp, sizeof (ifr)); 1564 ifrp++; 1565 } else { 1566 space -= sa->sa_len - sizeof(*sa); 1567 if (space < sizeof (ifr)) 1568 break; 1569 error = copyout((caddr_t)&ifr, 1570 (caddr_t)ifrp, 1571 sizeof(ifr.ifr_name)); 1572 if (error == 0) 1573 error = copyout((caddr_t)sa, 1574 (caddr_t)&ifrp->ifr_addr, 1575 sa->sa_len); 1576 ifrp = (struct ifreq *)(sa->sa_len + 1577 (caddr_t)&ifrp->ifr_addr); 1578 } 1579 if (error) 1580 break; 1581 space -= sizeof (ifr); 1582 } 1583 } 1584 ifc->ifc_len -= space; 1585 return (error); 1586 } 1587 1588 /* 1589 * Dummy functions replaced in ifnet during detach (if protocols decide to 1590 * fiddle with the if during detach. 1591 */ 1592 void 1593 if_detached_start(struct ifnet *ifp) 1594 { 1595 struct mbuf *m; 1596 1597 while (1) { 1598 IF_DEQUEUE(&ifp->if_snd, m); 1599 1600 if (m == NULL) 1601 return; 1602 m_freem(m); 1603 } 1604 } 1605 1606 int 1607 if_detached_ioctl(struct ifnet *ifp, u_long a, caddr_t b) 1608 { 1609 return ENODEV; 1610 } 1611 1612 int 1613 if_detached_init(struct ifnet *ifp) 1614 { 1615 return (ENXIO); 1616 } 1617 1618 void 1619 if_detached_watchdog(struct ifnet *ifp) 1620 { 1621 /* nothing */ 1622 } 1623 1624 /* 1625 * Create interface group without members 1626 */ 1627 struct ifg_group * 1628 if_creategroup(const char *groupname) 1629 { 1630 struct ifg_group *ifg; 1631 1632 if ((ifg = malloc(sizeof(*ifg), M_TEMP, M_NOWAIT)) == NULL) 1633 return (NULL); 1634 1635 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 1636 ifg->ifg_refcnt = 0; 1637 ifg->ifg_carp_demoted = 0; 1638 TAILQ_INIT(&ifg->ifg_members); 1639 #if NPF > 0 1640 pfi_attach_ifgroup(ifg); 1641 #endif 1642 TAILQ_INSERT_TAIL(&ifg_head, ifg, ifg_next); 1643 1644 return (ifg); 1645 } 1646 1647 /* 1648 * Add a group to an interface 1649 */ 1650 int 1651 if_addgroup(struct ifnet *ifp, const char *groupname) 1652 { 1653 struct ifg_list *ifgl; 1654 struct ifg_group *ifg = NULL; 1655 struct ifg_member *ifgm; 1656 1657 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 1658 groupname[strlen(groupname) - 1] <= '9') 1659 return (EINVAL); 1660 1661 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1662 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1663 return (EEXIST); 1664 1665 if ((ifgl = malloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL) 1666 return (ENOMEM); 1667 1668 if ((ifgm = malloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) { 1669 free(ifgl, M_TEMP); 1670 return (ENOMEM); 1671 } 1672 1673 TAILQ_FOREACH(ifg, &ifg_head, ifg_next) 1674 if (!strcmp(ifg->ifg_group, groupname)) 1675 break; 1676 1677 if (ifg == NULL && (ifg = if_creategroup(groupname)) == NULL) { 1678 free(ifgl, M_TEMP); 1679 free(ifgm, M_TEMP); 1680 return (ENOMEM); 1681 } 1682 1683 ifg->ifg_refcnt++; 1684 ifgl->ifgl_group = ifg; 1685 ifgm->ifgm_ifp = ifp; 1686 1687 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 1688 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 1689 1690 #if NPF > 0 1691 pfi_group_change(groupname); 1692 #endif 1693 1694 return (0); 1695 } 1696 1697 /* 1698 * Remove a group from an interface 1699 */ 1700 int 1701 if_delgroup(struct ifnet *ifp, const char *groupname) 1702 { 1703 struct ifg_list *ifgl; 1704 struct ifg_member *ifgm; 1705 1706 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1707 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1708 break; 1709 if (ifgl == NULL) 1710 return (ENOENT); 1711 1712 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1713 1714 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1715 if (ifgm->ifgm_ifp == ifp) 1716 break; 1717 1718 if (ifgm != NULL) { 1719 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 1720 free(ifgm, M_TEMP); 1721 } 1722 1723 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1724 TAILQ_REMOVE(&ifg_head, ifgl->ifgl_group, ifg_next); 1725 #if NPF > 0 1726 pfi_detach_ifgroup(ifgl->ifgl_group); 1727 #endif 1728 free(ifgl->ifgl_group, M_TEMP); 1729 } 1730 1731 free(ifgl, M_TEMP); 1732 1733 #if NPF > 0 1734 pfi_group_change(groupname); 1735 #endif 1736 1737 return (0); 1738 } 1739 1740 /* 1741 * Stores all groups from an interface in memory pointed 1742 * to by data 1743 */ 1744 int 1745 if_getgroup(caddr_t data, struct ifnet *ifp) 1746 { 1747 int len, error; 1748 struct ifg_list *ifgl; 1749 struct ifg_req ifgrq, *ifgp; 1750 struct ifgroupreq *ifgr = (struct ifgroupreq *)data; 1751 1752 if (ifgr->ifgr_len == 0) { 1753 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1754 ifgr->ifgr_len += sizeof(struct ifg_req); 1755 return (0); 1756 } 1757 1758 len = ifgr->ifgr_len; 1759 ifgp = ifgr->ifgr_groups; 1760 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 1761 if (len < sizeof(ifgrq)) 1762 return (EINVAL); 1763 bzero(&ifgrq, sizeof ifgrq); 1764 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 1765 sizeof(ifgrq.ifgrq_group)); 1766 if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp, 1767 sizeof(struct ifg_req)))) 1768 return (error); 1769 len -= sizeof(ifgrq); 1770 ifgp++; 1771 } 1772 1773 return (0); 1774 } 1775 1776 /* 1777 * Stores all members of a group in memory pointed to by data 1778 */ 1779 int 1780 if_getgroupmembers(caddr_t data) 1781 { 1782 struct ifgroupreq *ifgr = (struct ifgroupreq *)data; 1783 struct ifg_group *ifg; 1784 struct ifg_member *ifgm; 1785 struct ifg_req ifgrq, *ifgp; 1786 int len, error; 1787 1788 TAILQ_FOREACH(ifg, &ifg_head, ifg_next) 1789 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 1790 break; 1791 if (ifg == NULL) 1792 return (ENOENT); 1793 1794 if (ifgr->ifgr_len == 0) { 1795 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1796 ifgr->ifgr_len += sizeof(ifgrq); 1797 return (0); 1798 } 1799 1800 len = ifgr->ifgr_len; 1801 ifgp = ifgr->ifgr_groups; 1802 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1803 if (len < sizeof(ifgrq)) 1804 return (EINVAL); 1805 bzero(&ifgrq, sizeof ifgrq); 1806 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1807 sizeof(ifgrq.ifgrq_member)); 1808 if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp, 1809 sizeof(struct ifg_req)))) 1810 return (error); 1811 len -= sizeof(ifgrq); 1812 ifgp++; 1813 } 1814 1815 return (0); 1816 } 1817 1818 int 1819 if_getgroupattribs(caddr_t data) 1820 { 1821 struct ifgroupreq *ifgr = (struct ifgroupreq *)data; 1822 struct ifg_group *ifg; 1823 1824 TAILQ_FOREACH(ifg, &ifg_head, ifg_next) 1825 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 1826 break; 1827 if (ifg == NULL) 1828 return (ENOENT); 1829 1830 ifgr->ifgr_attrib.ifg_carp_demoted = ifg->ifg_carp_demoted; 1831 1832 return (0); 1833 } 1834 1835 int 1836 if_setgroupattribs(caddr_t data) 1837 { 1838 struct ifgroupreq *ifgr = (struct ifgroupreq *)data; 1839 struct ifg_group *ifg; 1840 struct ifg_member *ifgm; 1841 int demote; 1842 1843 TAILQ_FOREACH(ifg, &ifg_head, ifg_next) 1844 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 1845 break; 1846 if (ifg == NULL) 1847 return (ENOENT); 1848 1849 demote = ifgr->ifgr_attrib.ifg_carp_demoted; 1850 if (demote + ifg->ifg_carp_demoted > 0xff || 1851 demote + ifg->ifg_carp_demoted < 0) 1852 return (ERANGE); 1853 1854 ifg->ifg_carp_demoted += demote; 1855 1856 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1857 if (ifgm->ifgm_ifp->if_ioctl) 1858 ifgm->ifgm_ifp->if_ioctl(ifgm->ifgm_ifp, 1859 SIOCSIFGATTR, data); 1860 return (0); 1861 } 1862 1863 void 1864 if_group_routechange(struct sockaddr *dst, struct sockaddr *mask) 1865 { 1866 switch (dst->sa_family) { 1867 case AF_INET: 1868 if (satosin(dst)->sin_addr.s_addr == INADDR_ANY && 1869 mask && (mask->sa_len == 0 || 1870 satosin(mask)->sin_addr.s_addr == INADDR_ANY)) 1871 if_group_egress_build(); 1872 break; 1873 #ifdef INET6 1874 case AF_INET6: 1875 if (IN6_ARE_ADDR_EQUAL(&(satosin6(dst))->sin6_addr, 1876 &in6addr_any) && mask && 1877 IN6_ARE_ADDR_EQUAL(&(satosin6(mask))->sin6_addr, 1878 &in6addr_any)) 1879 if_group_egress_build(); 1880 break; 1881 #endif 1882 } 1883 } 1884 1885 int 1886 if_group_egress_build(void) 1887 { 1888 struct ifg_group *ifg; 1889 struct ifg_member *ifgm, *next; 1890 struct sockaddr_in sa_in; 1891 #ifdef INET6 1892 struct sockaddr_in6 sa_in6; 1893 #endif 1894 struct radix_node *rn; 1895 struct rtentry *rt; 1896 1897 TAILQ_FOREACH(ifg, &ifg_head, ifg_next) 1898 if (!strcmp(ifg->ifg_group, IFG_EGRESS)) 1899 break; 1900 1901 if (ifg != NULL) 1902 for (ifgm = TAILQ_FIRST(&ifg->ifg_members); ifgm; ifgm = next) { 1903 next = TAILQ_NEXT(ifgm, ifgm_next); 1904 if_delgroup(ifgm->ifgm_ifp, IFG_EGRESS); 1905 } 1906 1907 bzero(&sa_in, sizeof(sa_in)); 1908 sa_in.sin_len = sizeof(sa_in); 1909 sa_in.sin_family = AF_INET; 1910 if ((rn = rt_lookup(sintosa(&sa_in), sintosa(&sa_in), 0)) != NULL) { 1911 do { 1912 rt = (struct rtentry *)rn; 1913 if (rt->rt_ifp) 1914 if_addgroup(rt->rt_ifp, IFG_EGRESS); 1915 #ifndef SMALL_KERNEL 1916 rn = rn_mpath_next(rn); 1917 #else 1918 rn = NULL; 1919 #endif 1920 } while (rn != NULL); 1921 } 1922 1923 #ifdef INET6 1924 bcopy(&sa6_any, &sa_in6, sizeof(sa_in6)); 1925 if ((rn = rt_lookup(sin6tosa(&sa_in6), sin6tosa(&sa_in6), 0)) != NULL) { 1926 do { 1927 rt = (struct rtentry *)rn; 1928 if (rt->rt_ifp) 1929 if_addgroup(rt->rt_ifp, IFG_EGRESS); 1930 #ifndef SMALL_KERNEL 1931 rn = rn_mpath_next(rn); 1932 #else 1933 rn = NULL; 1934 #endif 1935 } while (rn != NULL); 1936 } 1937 #endif 1938 1939 return (0); 1940 } 1941 1942 /* 1943 * Set/clear promiscuous mode on interface ifp based on the truth value 1944 * of pswitch. The calls are reference counted so that only the first 1945 * "on" request actually has an effect, as does the final "off" request. 1946 * Results are undefined if the "off" and "on" requests are not matched. 1947 */ 1948 int 1949 ifpromisc(struct ifnet *ifp, int pswitch) 1950 { 1951 struct ifreq ifr; 1952 1953 if (pswitch) { 1954 /* 1955 * If the device is not configured up, we cannot put it in 1956 * promiscuous mode. 1957 */ 1958 if ((ifp->if_flags & IFF_UP) == 0) 1959 return (ENETDOWN); 1960 if (ifp->if_pcount++ != 0) 1961 return (0); 1962 ifp->if_flags |= IFF_PROMISC; 1963 } else { 1964 if (--ifp->if_pcount > 0) 1965 return (0); 1966 ifp->if_flags &= ~IFF_PROMISC; 1967 /* 1968 * If the device is not configured up, we should not need to 1969 * turn off promiscuous mode (device should have turned it 1970 * off when interface went down; and will look at IFF_PROMISC 1971 * again next time interface comes up). 1972 */ 1973 if ((ifp->if_flags & IFF_UP) == 0) 1974 return (0); 1975 } 1976 ifr.ifr_flags = ifp->if_flags; 1977 return ((*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr)); 1978 } 1979 1980 int 1981 sysctl_ifq(int *name, u_int namelen, void *oldp, size_t *oldlenp, 1982 void *newp, size_t newlen, struct ifqueue *ifq) 1983 { 1984 /* All sysctl names at this level are terminal. */ 1985 if (namelen != 1) 1986 return (ENOTDIR); 1987 1988 switch (name[0]) { 1989 case IFQCTL_LEN: 1990 return (sysctl_rdint(oldp, oldlenp, newp, ifq->ifq_len)); 1991 case IFQCTL_MAXLEN: 1992 return (sysctl_int(oldp, oldlenp, newp, newlen, 1993 &ifq->ifq_maxlen)); 1994 case IFQCTL_DROPS: 1995 return (sysctl_rdint(oldp, oldlenp, newp, ifq->ifq_drops)); 1996 default: 1997 return (EOPNOTSUPP); 1998 } 1999 /* NOTREACHED */ 2000 } 2001