if.c revision 1.198
1 /* $NetBSD: if.c,v 1.198 2007/08/31 21:02:15 dyoung Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2000, 2001 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. Neither the name of the project nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 */ 67 68 /* 69 * Copyright (c) 1980, 1986, 1993 70 * The Regents of the University of California. All rights reserved. 71 * 72 * Redistribution and use in source and binary forms, with or without 73 * modification, are permitted provided that the following conditions 74 * are met: 75 * 1. Redistributions of source code must retain the above copyright 76 * notice, this list of conditions and the following disclaimer. 77 * 2. Redistributions in binary form must reproduce the above copyright 78 * notice, this list of conditions and the following disclaimer in the 79 * documentation and/or other materials provided with the distribution. 80 * 3. Neither the name of the University nor the names of its contributors 81 * may be used to endorse or promote products derived from this software 82 * without specific prior written permission. 83 * 84 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 85 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 86 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 87 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 88 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 89 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 90 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 91 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 92 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 93 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 94 * SUCH DAMAGE. 95 * 96 * @(#)if.c 8.5 (Berkeley) 1/9/95 97 */ 98 99 #include <sys/cdefs.h> 100 __KERNEL_RCSID(0, "$NetBSD: if.c,v 1.198 2007/08/31 21:02:15 dyoung Exp $"); 101 102 #include "opt_inet.h" 103 104 #include "opt_atalk.h" 105 #include "opt_natm.h" 106 #include "opt_pfil_hooks.h" 107 108 #include <sys/param.h> 109 #include <sys/mbuf.h> 110 #include <sys/systm.h> 111 #include <sys/callout.h> 112 #include <sys/proc.h> 113 #include <sys/socket.h> 114 #include <sys/socketvar.h> 115 #include <sys/domain.h> 116 #include <sys/protosw.h> 117 #include <sys/kernel.h> 118 #include <sys/ioctl.h> 119 #include <sys/sysctl.h> 120 #include <sys/syslog.h> 121 #include <sys/kauth.h> 122 123 #include <net/if.h> 124 #include <net/if_dl.h> 125 #include <net/if_ether.h> 126 #include <net/if_media.h> 127 #include <net80211/ieee80211.h> 128 #include <net80211/ieee80211_ioctl.h> 129 #include <net/if_types.h> 130 #include <net/radix.h> 131 #include <net/route.h> 132 #include <net/netisr.h> 133 #ifdef NETATALK 134 #include <netatalk/at_extern.h> 135 #include <netatalk/at.h> 136 #endif 137 #include <net/pfil.h> 138 139 #ifdef INET6 140 #include <netinet/in.h> 141 #include <netinet6/in6_var.h> 142 #include <netinet6/nd6.h> 143 #endif 144 145 #include "carp.h" 146 #if NCARP > 0 147 #include <netinet/ip_carp.h> 148 #endif 149 150 #include <compat/sys/sockio.h> 151 #include <compat/sys/socket.h> 152 153 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 154 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 155 156 int ifqmaxlen = IFQ_MAXLEN; 157 callout_t if_slowtimo_ch; 158 159 int netisr; /* scheduling bits for network */ 160 161 static int if_rt_walktree(struct rtentry *, void *); 162 163 static struct if_clone *if_clone_lookup(const char *, int *); 164 static int if_clone_list(struct if_clonereq *); 165 166 static LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners); 167 static int if_cloners_count; 168 169 #ifdef PFIL_HOOKS 170 struct pfil_head if_pfil; /* packet filtering hook for interfaces */ 171 #endif 172 173 static void if_detach_queues(struct ifnet *, struct ifqueue *); 174 175 /* 176 * Network interface utility routines. 177 * 178 * Routines with ifa_ifwith* names take sockaddr *'s as 179 * parameters. 180 */ 181 void 182 ifinit(void) 183 { 184 185 callout_init(&if_slowtimo_ch, 0); 186 if_slowtimo(NULL); 187 #ifdef PFIL_HOOKS 188 if_pfil.ph_type = PFIL_TYPE_IFNET; 189 if_pfil.ph_ifnet = NULL; 190 if (pfil_head_register(&if_pfil) != 0) 191 printf("WARNING: unable to register pfil hook\n"); 192 #endif 193 } 194 195 /* 196 * Null routines used while an interface is going away. These routines 197 * just return an error. 198 */ 199 200 int 201 if_nulloutput(struct ifnet *ifp, struct mbuf *m, 202 const struct sockaddr *so, struct rtentry *rt) 203 { 204 205 return ENXIO; 206 } 207 208 void 209 if_nullinput(struct ifnet *ifp, struct mbuf *m) 210 { 211 212 /* Nothing. */ 213 } 214 215 void 216 if_nullstart(struct ifnet *ifp) 217 { 218 219 /* Nothing. */ 220 } 221 222 int 223 if_nullioctl(struct ifnet *ifp, u_long cmd, void *data) 224 { 225 226 return ENXIO; 227 } 228 229 int 230 if_nullinit(struct ifnet *ifp) 231 { 232 233 return ENXIO; 234 } 235 236 void 237 if_nullstop(struct ifnet *ifp, int disable) 238 { 239 240 /* Nothing. */ 241 } 242 243 void 244 if_nullwatchdog(struct ifnet *ifp) 245 { 246 247 /* Nothing. */ 248 } 249 250 void 251 if_nulldrain(struct ifnet *ifp) 252 { 253 254 /* Nothing. */ 255 } 256 257 static u_int if_index = 1; 258 struct ifnet_head ifnet; 259 size_t if_indexlim = 0; 260 struct ifaddr **ifnet_addrs = NULL; 261 struct ifnet **ifindex2ifnet = NULL; 262 struct ifnet *lo0ifp; 263 264 /* 265 * Allocate the link level name for the specified interface. This 266 * is an attachment helper. It must be called after ifp->if_addrlen 267 * is initialized, which may not be the case when if_attach() is 268 * called. 269 */ 270 void 271 if_alloc_sadl(struct ifnet *ifp) 272 { 273 unsigned socksize, ifasize; 274 int addrlen, namelen; 275 struct sockaddr_dl *mask, *sdl; 276 struct ifaddr *ifa; 277 278 /* 279 * If the interface already has a link name, release it 280 * now. This is useful for interfaces that can change 281 * link types, and thus switch link names often. 282 */ 283 if (ifp->if_sadl != NULL) 284 if_free_sadl(ifp); 285 286 namelen = strlen(ifp->if_xname); 287 addrlen = ifp->if_addrlen; 288 socksize = roundup(sockaddr_dl_measure(namelen, addrlen), sizeof(long)); 289 ifasize = sizeof(*ifa) + 2 * socksize; 290 ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK); 291 memset(ifa, 0, ifasize); 292 293 sdl = (struct sockaddr_dl *)(ifa + 1); 294 mask = (struct sockaddr_dl *)(socksize + (char *)sdl); 295 296 sockaddr_dl_init(sdl, socksize, ifp->if_index, ifp->if_type, 297 ifp->if_xname, namelen, NULL, addrlen); 298 mask->sdl_len = sockaddr_dl_measure(namelen, 0); 299 memset(&mask->sdl_data[0], 0xff, namelen); 300 301 ifnet_addrs[ifp->if_index] = ifa; 302 IFAREF(ifa); 303 ifa->ifa_ifp = ifp; 304 ifa->ifa_rtrequest = link_rtrequest; 305 TAILQ_INSERT_HEAD(&ifp->if_addrlist, ifa, ifa_list); 306 IFAREF(ifa); 307 ifa->ifa_addr = (struct sockaddr *)sdl; 308 ifp->if_sadl = sdl; 309 ifa->ifa_netmask = (struct sockaddr *)mask; 310 } 311 312 /* 313 * Free the link level name for the specified interface. This is 314 * a detach helper. This is called from if_detach() or from 315 * link layer type specific detach functions. 316 */ 317 void 318 if_free_sadl(struct ifnet *ifp) 319 { 320 struct ifaddr *ifa; 321 int s; 322 323 ifa = ifnet_addrs[ifp->if_index]; 324 if (ifa == NULL) { 325 KASSERT(ifp->if_sadl == NULL); 326 return; 327 } 328 329 KASSERT(ifp->if_sadl != NULL); 330 331 s = splnet(); 332 rtinit(ifa, RTM_DELETE, 0); 333 TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list); 334 IFAFREE(ifa); 335 336 ifp->if_sadl = NULL; 337 338 ifnet_addrs[ifp->if_index] = NULL; 339 IFAFREE(ifa); 340 splx(s); 341 } 342 343 /* 344 * Attach an interface to the 345 * list of "active" interfaces. 346 */ 347 void 348 if_attach(struct ifnet *ifp) 349 { 350 int indexlim = 0; 351 352 if (if_indexlim == 0) { 353 TAILQ_INIT(&ifnet); 354 if_indexlim = 8; 355 } 356 TAILQ_INIT(&ifp->if_addrlist); 357 TAILQ_INSERT_TAIL(&ifnet, ifp, if_list); 358 ifp->if_index = if_index; 359 if (ifindex2ifnet == NULL) 360 if_index++; 361 else 362 while (ifp->if_index < if_indexlim && 363 ifindex2ifnet[ifp->if_index] != NULL) { 364 ++if_index; 365 if (if_index == 0) 366 if_index = 1; 367 /* 368 * If we hit USHRT_MAX, we skip back to 0 since 369 * there are a number of places where the value 370 * of if_index or if_index itself is compared 371 * to or stored in an unsigned short. By 372 * jumping back, we won't botch those assignments 373 * or comparisons. 374 */ 375 else if (if_index == USHRT_MAX) { 376 /* 377 * However, if we have to jump back to 378 * zero *twice* without finding an empty 379 * slot in ifindex2ifnet[], then there 380 * there are too many (>65535) interfaces. 381 */ 382 if (indexlim++) 383 panic("too many interfaces"); 384 else 385 if_index = 1; 386 } 387 ifp->if_index = if_index; 388 } 389 390 /* 391 * We have some arrays that should be indexed by if_index. 392 * since if_index will grow dynamically, they should grow too. 393 * struct ifadd **ifnet_addrs 394 * struct ifnet **ifindex2ifnet 395 */ 396 if (ifnet_addrs == NULL || ifindex2ifnet == NULL || 397 ifp->if_index >= if_indexlim) { 398 size_t m, n, oldlim; 399 void *q; 400 401 oldlim = if_indexlim; 402 while (ifp->if_index >= if_indexlim) 403 if_indexlim <<= 1; 404 405 /* grow ifnet_addrs */ 406 m = oldlim * sizeof(struct ifaddr *); 407 n = if_indexlim * sizeof(struct ifaddr *); 408 q = (void *)malloc(n, M_IFADDR, M_WAITOK); 409 memset(q, 0, n); 410 if (ifnet_addrs != NULL) { 411 memcpy(q, ifnet_addrs, m); 412 free((void *)ifnet_addrs, M_IFADDR); 413 } 414 ifnet_addrs = (struct ifaddr **)q; 415 416 /* grow ifindex2ifnet */ 417 m = oldlim * sizeof(struct ifnet *); 418 n = if_indexlim * sizeof(struct ifnet *); 419 q = (void *)malloc(n, M_IFADDR, M_WAITOK); 420 memset(q, 0, n); 421 if (ifindex2ifnet != NULL) { 422 memcpy(q, (void *)ifindex2ifnet, m); 423 free((void *)ifindex2ifnet, M_IFADDR); 424 } 425 ifindex2ifnet = (struct ifnet **)q; 426 } 427 428 ifindex2ifnet[ifp->if_index] = ifp; 429 430 /* 431 * Link level name is allocated later by a separate call to 432 * if_alloc_sadl(). 433 */ 434 435 if (ifp->if_snd.ifq_maxlen == 0) 436 ifp->if_snd.ifq_maxlen = ifqmaxlen; 437 ifp->if_broadcastaddr = 0; /* reliably crash if used uninitialized */ 438 439 ifp->if_link_state = LINK_STATE_UNKNOWN; 440 441 ifp->if_capenable = 0; 442 ifp->if_csum_flags_tx = 0; 443 ifp->if_csum_flags_rx = 0; 444 445 #ifdef ALTQ 446 ifp->if_snd.altq_type = 0; 447 ifp->if_snd.altq_disc = NULL; 448 ifp->if_snd.altq_flags &= ALTQF_CANTCHANGE; 449 ifp->if_snd.altq_tbr = NULL; 450 ifp->if_snd.altq_ifp = ifp; 451 #endif 452 453 #ifdef PFIL_HOOKS 454 ifp->if_pfil.ph_type = PFIL_TYPE_IFNET; 455 ifp->if_pfil.ph_ifnet = ifp; 456 if (pfil_head_register(&ifp->if_pfil) != 0) 457 printf("%s: WARNING: unable to register pfil hook\n", 458 ifp->if_xname); 459 (void)pfil_run_hooks(&if_pfil, 460 (struct mbuf **)PFIL_IFNET_ATTACH, ifp, PFIL_IFNET); 461 #endif 462 463 if (!STAILQ_EMPTY(&domains)) 464 if_attachdomain1(ifp); 465 466 /* Announce the interface. */ 467 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 468 } 469 470 void 471 if_attachdomain(void) 472 { 473 struct ifnet *ifp; 474 int s; 475 476 s = splnet(); 477 IFNET_FOREACH(ifp) 478 if_attachdomain1(ifp); 479 splx(s); 480 } 481 482 void 483 if_attachdomain1(struct ifnet *ifp) 484 { 485 struct domain *dp; 486 int s; 487 488 s = splnet(); 489 490 /* address family dependent data region */ 491 memset(ifp->if_afdata, 0, sizeof(ifp->if_afdata)); 492 DOMAIN_FOREACH(dp) { 493 if (dp->dom_ifattach != NULL) 494 ifp->if_afdata[dp->dom_family] = 495 (*dp->dom_ifattach)(ifp); 496 } 497 498 splx(s); 499 } 500 501 /* 502 * Deactivate an interface. This points all of the procedure 503 * handles at error stubs. May be called from interrupt context. 504 */ 505 void 506 if_deactivate(struct ifnet *ifp) 507 { 508 int s; 509 510 s = splnet(); 511 512 ifp->if_output = if_nulloutput; 513 ifp->if_input = if_nullinput; 514 ifp->if_start = if_nullstart; 515 ifp->if_ioctl = if_nullioctl; 516 ifp->if_init = if_nullinit; 517 ifp->if_stop = if_nullstop; 518 ifp->if_watchdog = if_nullwatchdog; 519 ifp->if_drain = if_nulldrain; 520 521 /* No more packets may be enqueued. */ 522 ifp->if_snd.ifq_maxlen = 0; 523 524 splx(s); 525 } 526 527 /* 528 * Detach an interface from the list of "active" interfaces, 529 * freeing any resources as we go along. 530 * 531 * NOTE: This routine must be called with a valid thread context, 532 * as it may block. 533 */ 534 void 535 if_detach(struct ifnet *ifp) 536 { 537 struct socket so; 538 struct ifaddr *ifa; 539 #ifdef IFAREF_DEBUG 540 struct ifaddr *last_ifa = NULL; 541 #endif 542 struct domain *dp; 543 const struct protosw *pr; 544 int s, i, family, purged; 545 546 /* 547 * XXX It's kind of lame that we have to have the 548 * XXX socket structure... 549 */ 550 memset(&so, 0, sizeof(so)); 551 552 s = splnet(); 553 554 /* 555 * Do an if_down() to give protocols a chance to do something. 556 */ 557 if_down(ifp); 558 559 #ifdef ALTQ 560 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 561 altq_disable(&ifp->if_snd); 562 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 563 altq_detach(&ifp->if_snd); 564 #endif 565 566 567 #if NCARP > 0 568 /* Remove the interface from any carp group it is a part of. */ 569 if (ifp->if_carp != NULL && ifp->if_type != IFT_CARP) 570 carp_ifdetach(ifp); 571 #endif 572 573 /* 574 * Rip all the addresses off the interface. This should make 575 * all of the routes go away. 576 * 577 * pr_usrreq calls can remove an arbitrary number of ifaddrs 578 * from the list, including our "cursor", ifa. For safety, 579 * and to honor the TAILQ abstraction, I just restart the 580 * loop after each removal. Note that the loop will exit 581 * when all of the remaining ifaddrs belong to the AF_LINK 582 * family. I am counting on the historical fact that at 583 * least one pr_usrreq in each address domain removes at 584 * least one ifaddr. 585 */ 586 again: 587 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 588 family = ifa->ifa_addr->sa_family; 589 #ifdef IFAREF_DEBUG 590 printf("if_detach: ifaddr %p, family %d, refcnt %d\n", 591 ifa, family, ifa->ifa_refcnt); 592 if (last_ifa != NULL && ifa == last_ifa) 593 panic("if_detach: loop detected"); 594 last_ifa = ifa; 595 #endif 596 if (family == AF_LINK) 597 continue; 598 dp = pffinddomain(family); 599 #ifdef DIAGNOSTIC 600 if (dp == NULL) 601 panic("if_detach: no domain for AF %d", 602 family); 603 #endif 604 /* 605 * XXX These PURGEIF calls are redundant with the 606 * purge-all-families calls below, but are left in for 607 * now both to make a smaller change, and to avoid 608 * unplanned interactions with clearing of 609 * ifp->if_addrlist. 610 */ 611 purged = 0; 612 for (pr = dp->dom_protosw; 613 pr < dp->dom_protoswNPROTOSW; pr++) { 614 so.so_proto = pr; 615 if (pr->pr_usrreq != NULL) { 616 (void) (*pr->pr_usrreq)(&so, 617 PRU_PURGEIF, NULL, NULL, 618 (struct mbuf *) ifp, curlwp); 619 purged = 1; 620 } 621 } 622 if (purged == 0) { 623 /* 624 * XXX What's really the best thing to do 625 * XXX here? --thorpej (at) NetBSD.org 626 */ 627 printf("if_detach: WARNING: AF %d not purged\n", 628 family); 629 TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list); 630 } 631 goto again; 632 } 633 634 if_free_sadl(ifp); 635 636 /* Walk the routing table looking for stragglers. */ 637 for (i = 0; i <= AF_MAX; i++) 638 (void)rt_walktree(i, if_rt_walktree, ifp); 639 640 DOMAIN_FOREACH(dp) { 641 if (dp->dom_ifdetach != NULL && ifp->if_afdata[dp->dom_family]) 642 (*dp->dom_ifdetach)(ifp, 643 ifp->if_afdata[dp->dom_family]); 644 645 /* 646 * One would expect multicast memberships (INET and 647 * INET6) on UDP sockets to be purged by the PURGEIF 648 * calls above, but if all addresses were removed from 649 * the interface prior to destruction, the calls will 650 * not be made (e.g. ppp, for which pppd(8) generally 651 * removes addresses before destroying the interface). 652 * Because there is no invariant that multicast 653 * memberships only exist for interfaces with IPv4 654 * addresses, we must call PURGEIF regardless of 655 * addresses. (Protocols which might store ifnet 656 * pointers are marked with PR_PURGEIF.) 657 */ 658 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 659 so.so_proto = pr; 660 if (pr->pr_usrreq != NULL && pr->pr_flags & PR_PURGEIF) 661 (void)(*pr->pr_usrreq)(&so, PRU_PURGEIF, NULL, 662 NULL, (struct mbuf *)ifp, curlwp); 663 } 664 } 665 666 #ifdef PFIL_HOOKS 667 (void)pfil_run_hooks(&if_pfil, 668 (struct mbuf **)PFIL_IFNET_DETACH, ifp, PFIL_IFNET); 669 (void)pfil_head_unregister(&ifp->if_pfil); 670 #endif 671 672 /* Announce that the interface is gone. */ 673 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 674 675 ifindex2ifnet[ifp->if_index] = NULL; 676 677 TAILQ_REMOVE(&ifnet, ifp, if_list); 678 679 /* 680 * remove packets that came from ifp, from software interrupt queues. 681 */ 682 DOMAIN_FOREACH(dp) { 683 for (i = 0; i < __arraycount(dp->dom_ifqueues); i++) { 684 if (dp->dom_ifqueues[i] == NULL) 685 break; 686 if_detach_queues(ifp, dp->dom_ifqueues[i]); 687 } 688 } 689 690 splx(s); 691 } 692 693 static void 694 if_detach_queues(struct ifnet *ifp, struct ifqueue *q) 695 { 696 struct mbuf *m, *prev, *next; 697 698 prev = NULL; 699 for (m = q->ifq_head; m != NULL; m = next) { 700 next = m->m_nextpkt; 701 #ifdef DIAGNOSTIC 702 if ((m->m_flags & M_PKTHDR) == 0) { 703 prev = m; 704 continue; 705 } 706 #endif 707 if (m->m_pkthdr.rcvif != ifp) { 708 prev = m; 709 continue; 710 } 711 712 if (prev != NULL) 713 prev->m_nextpkt = m->m_nextpkt; 714 else 715 q->ifq_head = m->m_nextpkt; 716 if (q->ifq_tail == m) 717 q->ifq_tail = prev; 718 q->ifq_len--; 719 720 m->m_nextpkt = NULL; 721 m_freem(m); 722 IF_DROP(q); 723 } 724 } 725 726 /* 727 * Callback for a radix tree walk to delete all references to an 728 * ifnet. 729 */ 730 static int 731 if_rt_walktree(struct rtentry *rt, void *v) 732 { 733 struct ifnet *ifp = (struct ifnet *)v; 734 int error; 735 736 if (rt->rt_ifp != ifp) 737 return 0; 738 739 /* Delete the entry. */ 740 ++rt->rt_refcnt; 741 error = rtrequest(RTM_DELETE, rt_getkey(rt), rt->rt_gateway, 742 rt_mask(rt), rt->rt_flags, NULL); 743 KASSERT((rt->rt_flags & RTF_UP) == 0); 744 rt->rt_ifp = NULL; 745 RTFREE(rt); 746 if (error != 0) 747 printf("%s: warning: unable to delete rtentry @ %p, " 748 "error = %d\n", ifp->if_xname, rt, error); 749 return 0; 750 } 751 752 /* 753 * Create a clone network interface. 754 */ 755 int 756 if_clone_create(const char *name) 757 { 758 struct if_clone *ifc; 759 int unit; 760 761 ifc = if_clone_lookup(name, &unit); 762 if (ifc == NULL) 763 return EINVAL; 764 765 if (ifunit(name) != NULL) 766 return EEXIST; 767 768 return (*ifc->ifc_create)(ifc, unit); 769 } 770 771 /* 772 * Destroy a clone network interface. 773 */ 774 int 775 if_clone_destroy(const char *name) 776 { 777 struct if_clone *ifc; 778 struct ifnet *ifp; 779 780 ifc = if_clone_lookup(name, NULL); 781 if (ifc == NULL) 782 return EINVAL; 783 784 ifp = ifunit(name); 785 if (ifp == NULL) 786 return ENXIO; 787 788 if (ifc->ifc_destroy == NULL) 789 return EOPNOTSUPP; 790 791 return (*ifc->ifc_destroy)(ifp); 792 } 793 794 /* 795 * Look up a network interface cloner. 796 */ 797 static struct if_clone * 798 if_clone_lookup(const char *name, int *unitp) 799 { 800 struct if_clone *ifc; 801 const char *cp; 802 int unit; 803 804 /* separate interface name from unit */ 805 for (cp = name; 806 cp - name < IFNAMSIZ && *cp && (*cp < '0' || *cp > '9'); 807 cp++) 808 continue; 809 810 if (cp == name || cp - name == IFNAMSIZ || !*cp) 811 return NULL; /* No name or unit number */ 812 813 LIST_FOREACH(ifc, &if_cloners, ifc_list) { 814 if (strlen(ifc->ifc_name) == cp - name && 815 strncmp(name, ifc->ifc_name, cp - name) == 0) 816 break; 817 } 818 819 if (ifc == NULL) 820 return NULL; 821 822 unit = 0; 823 while (cp - name < IFNAMSIZ && *cp) { 824 if (*cp < '0' || *cp > '9' || unit > INT_MAX / 10) { 825 /* Bogus unit number. */ 826 return NULL; 827 } 828 unit = (unit * 10) + (*cp++ - '0'); 829 } 830 831 if (unitp != NULL) 832 *unitp = unit; 833 return ifc; 834 } 835 836 /* 837 * Register a network interface cloner. 838 */ 839 void 840 if_clone_attach(struct if_clone *ifc) 841 { 842 843 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list); 844 if_cloners_count++; 845 } 846 847 /* 848 * Unregister a network interface cloner. 849 */ 850 void 851 if_clone_detach(struct if_clone *ifc) 852 { 853 854 LIST_REMOVE(ifc, ifc_list); 855 if_cloners_count--; 856 } 857 858 /* 859 * Provide list of interface cloners to userspace. 860 */ 861 static int 862 if_clone_list(struct if_clonereq *ifcr) 863 { 864 char outbuf[IFNAMSIZ], *dst; 865 struct if_clone *ifc; 866 int count, error = 0; 867 868 ifcr->ifcr_total = if_cloners_count; 869 if ((dst = ifcr->ifcr_buffer) == NULL) { 870 /* Just asking how many there are. */ 871 return 0; 872 } 873 874 if (ifcr->ifcr_count < 0) 875 return EINVAL; 876 877 count = (if_cloners_count < ifcr->ifcr_count) ? 878 if_cloners_count : ifcr->ifcr_count; 879 880 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0; 881 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) { 882 (void)strncpy(outbuf, ifc->ifc_name, sizeof(outbuf)); 883 if (outbuf[sizeof(outbuf) - 1] != '\0') 884 return ENAMETOOLONG; 885 error = copyout(outbuf, dst, sizeof(outbuf)); 886 if (error != 0) 887 break; 888 } 889 890 return error; 891 } 892 893 static inline int 894 equal(const struct sockaddr *sa1, const struct sockaddr *sa2) 895 { 896 return sockaddr_cmp(sa1, sa2) == 0; 897 } 898 899 /* 900 * Locate an interface based on a complete address. 901 */ 902 /*ARGSUSED*/ 903 struct ifaddr * 904 ifa_ifwithaddr(const struct sockaddr *addr) 905 { 906 struct ifnet *ifp; 907 struct ifaddr *ifa; 908 909 IFNET_FOREACH(ifp) { 910 if (ifp->if_output == if_nulloutput) 911 continue; 912 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 913 if (ifa->ifa_addr->sa_family != addr->sa_family) 914 continue; 915 if (equal(addr, ifa->ifa_addr)) 916 return ifa; 917 if ((ifp->if_flags & IFF_BROADCAST) && 918 ifa->ifa_broadaddr && 919 /* IP6 doesn't have broadcast */ 920 ifa->ifa_broadaddr->sa_len != 0 && 921 equal(ifa->ifa_broadaddr, addr)) 922 return ifa; 923 } 924 } 925 return NULL; 926 } 927 928 /* 929 * Locate the point to point interface with a given destination address. 930 */ 931 /*ARGSUSED*/ 932 struct ifaddr * 933 ifa_ifwithdstaddr(const struct sockaddr *addr) 934 { 935 struct ifnet *ifp; 936 struct ifaddr *ifa; 937 938 IFNET_FOREACH(ifp) { 939 if (ifp->if_output == if_nulloutput) 940 continue; 941 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 942 continue; 943 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 944 if (ifa->ifa_addr->sa_family != addr->sa_family || 945 ifa->ifa_dstaddr == NULL) 946 continue; 947 if (equal(addr, ifa->ifa_dstaddr)) 948 return ifa; 949 } 950 } 951 return NULL; 952 } 953 954 /* 955 * Find an interface on a specific network. If many, choice 956 * is most specific found. 957 */ 958 struct ifaddr * 959 ifa_ifwithnet(const struct sockaddr *addr) 960 { 961 struct ifnet *ifp; 962 struct ifaddr *ifa; 963 const struct sockaddr_dl *sdl; 964 struct ifaddr *ifa_maybe = 0; 965 u_int af = addr->sa_family; 966 const char *addr_data = addr->sa_data, *cplim; 967 968 if (af == AF_LINK) { 969 sdl = satocsdl(addr); 970 if (sdl->sdl_index && sdl->sdl_index < if_indexlim && 971 ifindex2ifnet[sdl->sdl_index] && 972 ifindex2ifnet[sdl->sdl_index]->if_output != if_nulloutput) 973 return ifnet_addrs[sdl->sdl_index]; 974 } 975 #ifdef NETATALK 976 if (af == AF_APPLETALK) { 977 const struct sockaddr_at *sat, *sat2; 978 sat = (const struct sockaddr_at *)addr; 979 IFNET_FOREACH(ifp) { 980 if (ifp->if_output == if_nulloutput) 981 continue; 982 ifa = at_ifawithnet((const struct sockaddr_at *)addr, ifp); 983 if (ifa == NULL) 984 continue; 985 sat2 = (struct sockaddr_at *)ifa->ifa_addr; 986 if (sat2->sat_addr.s_net == sat->sat_addr.s_net) 987 return ifa; /* exact match */ 988 if (ifa_maybe == NULL) { 989 /* else keep the if with the right range */ 990 ifa_maybe = ifa; 991 } 992 } 993 return ifa_maybe; 994 } 995 #endif 996 IFNET_FOREACH(ifp) { 997 if (ifp->if_output == if_nulloutput) 998 continue; 999 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 1000 const char *cp, *cp2, *cp3; 1001 1002 if (ifa->ifa_addr->sa_family != af || 1003 ifa->ifa_netmask == NULL) 1004 next: continue; 1005 cp = addr_data; 1006 cp2 = ifa->ifa_addr->sa_data; 1007 cp3 = ifa->ifa_netmask->sa_data; 1008 cplim = (const char *)ifa->ifa_netmask + 1009 ifa->ifa_netmask->sa_len; 1010 while (cp3 < cplim) { 1011 if ((*cp++ ^ *cp2++) & *cp3++) { 1012 /* want to continue for() loop */ 1013 goto next; 1014 } 1015 } 1016 if (ifa_maybe == NULL || 1017 rn_refines((void *)ifa->ifa_netmask, 1018 (void *)ifa_maybe->ifa_netmask)) 1019 ifa_maybe = ifa; 1020 } 1021 } 1022 return ifa_maybe; 1023 } 1024 1025 /* 1026 * Find the interface of the addresss. 1027 */ 1028 struct ifaddr * 1029 ifa_ifwithladdr(const struct sockaddr *addr) 1030 { 1031 struct ifaddr *ia; 1032 1033 if ((ia = ifa_ifwithaddr(addr)) || (ia = ifa_ifwithdstaddr(addr)) || 1034 (ia = ifa_ifwithnet(addr))) 1035 return ia; 1036 return NULL; 1037 } 1038 1039 /* 1040 * Find an interface using a specific address family 1041 */ 1042 struct ifaddr * 1043 ifa_ifwithaf(int af) 1044 { 1045 struct ifnet *ifp; 1046 struct ifaddr *ifa; 1047 1048 IFNET_FOREACH(ifp) { 1049 if (ifp->if_output == if_nulloutput) 1050 continue; 1051 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 1052 if (ifa->ifa_addr->sa_family == af) 1053 return ifa; 1054 } 1055 } 1056 return NULL; 1057 } 1058 1059 /* 1060 * Find an interface address specific to an interface best matching 1061 * a given address. 1062 */ 1063 struct ifaddr * 1064 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp) 1065 { 1066 struct ifaddr *ifa; 1067 const char *cp, *cp2, *cp3; 1068 const char *cplim; 1069 struct ifaddr *ifa_maybe = 0; 1070 u_int af = addr->sa_family; 1071 1072 if (ifp->if_output == if_nulloutput) 1073 return NULL; 1074 1075 if (af >= AF_MAX) 1076 return NULL; 1077 1078 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 1079 if (ifa->ifa_addr->sa_family != af) 1080 continue; 1081 ifa_maybe = ifa; 1082 if (ifa->ifa_netmask == NULL) { 1083 if (equal(addr, ifa->ifa_addr) || 1084 (ifa->ifa_dstaddr && 1085 equal(addr, ifa->ifa_dstaddr))) 1086 return ifa; 1087 continue; 1088 } 1089 cp = addr->sa_data; 1090 cp2 = ifa->ifa_addr->sa_data; 1091 cp3 = ifa->ifa_netmask->sa_data; 1092 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1093 for (; cp3 < cplim; cp3++) { 1094 if ((*cp++ ^ *cp2++) & *cp3) 1095 break; 1096 } 1097 if (cp3 == cplim) 1098 return ifa; 1099 } 1100 return ifa_maybe; 1101 } 1102 1103 /* 1104 * Default action when installing a route with a Link Level gateway. 1105 * Lookup an appropriate real ifa to point to. 1106 * This should be moved to /sys/net/link.c eventually. 1107 */ 1108 void 1109 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 1110 { 1111 struct ifaddr *ifa; 1112 const struct sockaddr *dst; 1113 struct ifnet *ifp; 1114 1115 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == NULL) || 1116 ((ifp = ifa->ifa_ifp) == NULL) || ((dst = rt_getkey(rt)) == NULL)) 1117 return; 1118 if ((ifa = ifaof_ifpforaddr(dst, ifp)) != NULL) { 1119 rt_replace_ifa(rt, ifa); 1120 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1121 ifa->ifa_rtrequest(cmd, rt, info); 1122 } 1123 } 1124 1125 /* 1126 * Handle a change in the interface link state. 1127 */ 1128 void 1129 if_link_state_change(struct ifnet *ifp, int link_state) 1130 { 1131 if (ifp->if_link_state == link_state) 1132 return; 1133 ifp->if_link_state = link_state; 1134 /* Notify that the link state has changed. */ 1135 rt_ifmsg(ifp); 1136 #if NCARP > 0 1137 if (ifp->if_carp) 1138 carp_carpdev_state(ifp); 1139 #endif 1140 } 1141 1142 /* 1143 * Mark an interface down and notify protocols of 1144 * the transition. 1145 * NOTE: must be called at splsoftnet or equivalent. 1146 */ 1147 void 1148 if_down(struct ifnet *ifp) 1149 { 1150 struct ifaddr *ifa; 1151 1152 ifp->if_flags &= ~IFF_UP; 1153 microtime(&ifp->if_lastchange); 1154 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 1155 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1156 IFQ_PURGE(&ifp->if_snd); 1157 #if NCARP > 0 1158 if (ifp->if_carp) 1159 carp_carpdev_state(ifp); 1160 #endif 1161 rt_ifmsg(ifp); 1162 } 1163 1164 /* 1165 * Mark an interface up and notify protocols of 1166 * the transition. 1167 * NOTE: must be called at splsoftnet or equivalent. 1168 */ 1169 void 1170 if_up(struct ifnet *ifp) 1171 { 1172 #ifdef notyet 1173 struct ifaddr *ifa; 1174 #endif 1175 1176 ifp->if_flags |= IFF_UP; 1177 microtime(&ifp->if_lastchange); 1178 #ifdef notyet 1179 /* this has no effect on IP, and will kill all ISO connections XXX */ 1180 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 1181 pfctlinput(PRC_IFUP, ifa->ifa_addr); 1182 #endif 1183 #if NCARP > 0 1184 if (ifp->if_carp) 1185 carp_carpdev_state(ifp); 1186 #endif 1187 rt_ifmsg(ifp); 1188 #ifdef INET6 1189 in6_if_up(ifp); 1190 #endif 1191 } 1192 1193 /* 1194 * Handle interface watchdog timer routines. Called 1195 * from softclock, we decrement timers (if set) and 1196 * call the appropriate interface routine on expiration. 1197 */ 1198 void 1199 if_slowtimo(void *arg) 1200 { 1201 struct ifnet *ifp; 1202 int s = splnet(); 1203 1204 IFNET_FOREACH(ifp) { 1205 if (ifp->if_timer == 0 || --ifp->if_timer) 1206 continue; 1207 if (ifp->if_watchdog != NULL) 1208 (*ifp->if_watchdog)(ifp); 1209 } 1210 splx(s); 1211 callout_reset(&if_slowtimo_ch, hz / IFNET_SLOWHZ, if_slowtimo, NULL); 1212 } 1213 1214 /* 1215 * Set/clear promiscuous mode on interface ifp based on the truth value 1216 * of pswitch. The calls are reference counted so that only the first 1217 * "on" request actually has an effect, as does the final "off" request. 1218 * Results are undefined if the "off" and "on" requests are not matched. 1219 */ 1220 int 1221 ifpromisc(struct ifnet *ifp, int pswitch) 1222 { 1223 int pcount, ret; 1224 short flags; 1225 struct ifreq ifr; 1226 1227 pcount = ifp->if_pcount; 1228 flags = ifp->if_flags; 1229 if (pswitch) { 1230 /* 1231 * Allow the device to be "placed" into promiscuous 1232 * mode even if it is not configured up. It will 1233 * consult IFF_PROMISC when it is is brought up. 1234 */ 1235 if (ifp->if_pcount++ != 0) 1236 return 0; 1237 ifp->if_flags |= IFF_PROMISC; 1238 if ((ifp->if_flags & IFF_UP) == 0) 1239 return 0; 1240 } else { 1241 if (--ifp->if_pcount > 0) 1242 return 0; 1243 ifp->if_flags &= ~IFF_PROMISC; 1244 /* 1245 * If the device is not configured up, we should not need to 1246 * turn off promiscuous mode (device should have turned it 1247 * off when interface went down; and will look at IFF_PROMISC 1248 * again next time interface comes up). 1249 */ 1250 if ((ifp->if_flags & IFF_UP) == 0) 1251 return 0; 1252 } 1253 memset(&ifr, 0, sizeof(ifr)); 1254 ifr.ifr_flags = ifp->if_flags; 1255 ret = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (void *) &ifr); 1256 /* Restore interface state if not successful. */ 1257 if (ret != 0) { 1258 ifp->if_pcount = pcount; 1259 ifp->if_flags = flags; 1260 } 1261 return ret; 1262 } 1263 1264 /* 1265 * Map interface name to 1266 * interface structure pointer. 1267 */ 1268 struct ifnet * 1269 ifunit(const char *name) 1270 { 1271 struct ifnet *ifp; 1272 const char *cp = name; 1273 u_int unit = 0; 1274 u_int i; 1275 1276 /* 1277 * If the entire name is a number, treat it as an ifindex. 1278 */ 1279 for (i = 0; i < IFNAMSIZ && *cp >= '0' && *cp <= '9'; i++, cp++) { 1280 unit = unit * 10 + (*cp - '0'); 1281 } 1282 1283 /* 1284 * If the number took all of the name, then it's a valid ifindex. 1285 */ 1286 if (i == IFNAMSIZ || (cp != name && *cp == '\0')) { 1287 if (unit >= if_indexlim) 1288 return NULL; 1289 ifp = ifindex2ifnet[unit]; 1290 if (ifp == NULL || ifp->if_output == if_nulloutput) 1291 return NULL; 1292 return ifp; 1293 } 1294 1295 IFNET_FOREACH(ifp) { 1296 if (ifp->if_output == if_nulloutput) 1297 continue; 1298 if (strcmp(ifp->if_xname, name) == 0) 1299 return ifp; 1300 } 1301 return NULL; 1302 } 1303 1304 /* 1305 * Interface ioctls. 1306 */ 1307 int 1308 ifioctl(struct socket *so, u_long cmd, void *data, struct lwp *l) 1309 { 1310 struct ifnet *ifp; 1311 struct ifreq *ifr; 1312 struct ifcapreq *ifcr; 1313 struct ifdatareq *ifdr; 1314 int s, error = 0; 1315 #if defined(COMPAT_OSOCK) || defined(COMPAT_OIFREQ) 1316 u_long ocmd = cmd; 1317 #endif 1318 short oif_flags; 1319 #ifdef COMPAT_OIFREQ 1320 struct ifreq ifrb; 1321 struct oifreq *oifr = NULL; 1322 #endif 1323 1324 switch (cmd) { 1325 #ifdef COMPAT_OIFREQ 1326 case OSIOCGIFCONF: 1327 case OOSIOCGIFCONF: 1328 return compat_ifconf(cmd, data); 1329 #endif 1330 case SIOCGIFCONF: 1331 return ifconf(cmd, data); 1332 } 1333 1334 #ifdef COMPAT_OIFREQ 1335 cmd = compat_cvtcmd(cmd); 1336 if (cmd != ocmd) { 1337 oifr = data; 1338 data = ifr = &ifrb; 1339 ifreqo2n(oifr, ifr); 1340 } else 1341 #endif 1342 ifr = data; 1343 ifcr = data; 1344 ifdr = data; 1345 1346 ifp = ifunit(ifr->ifr_name); 1347 1348 switch (cmd) { 1349 case SIOCIFCREATE: 1350 case SIOCIFDESTROY: 1351 if (l != NULL) { 1352 error = kauth_authorize_network(l->l_cred, 1353 KAUTH_NETWORK_INTERFACE, 1354 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, 1355 (void *)cmd, NULL); 1356 if (error != 0) 1357 return error; 1358 } 1359 return (cmd == SIOCIFCREATE) ? 1360 if_clone_create(ifr->ifr_name) : 1361 if_clone_destroy(ifr->ifr_name); 1362 1363 case SIOCIFGCLONERS: 1364 return if_clone_list((struct if_clonereq *)data); 1365 } 1366 1367 if (ifp == NULL) 1368 return ENXIO; 1369 1370 switch (cmd) { 1371 case SIOCSIFFLAGS: 1372 case SIOCSIFCAP: 1373 case SIOCSIFMETRIC: 1374 case SIOCZIFDATA: 1375 case SIOCSIFMTU: 1376 case SIOCSIFPHYADDR: 1377 case SIOCDIFPHYADDR: 1378 #ifdef INET6 1379 case SIOCSIFPHYADDR_IN6: 1380 #endif 1381 case SIOCSLIFPHYADDR: 1382 case SIOCADDMULTI: 1383 case SIOCDELMULTI: 1384 case SIOCSIFMEDIA: 1385 case SIOCSDRVSPEC: 1386 case SIOCG80211: 1387 case SIOCS80211: 1388 case SIOCS80211NWID: 1389 case SIOCS80211NWKEY: 1390 case SIOCS80211POWER: 1391 case SIOCS80211BSSID: 1392 case SIOCS80211CHANNEL: 1393 if (l != NULL) { 1394 error = kauth_authorize_network(l->l_cred, 1395 KAUTH_NETWORK_INTERFACE, 1396 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, 1397 (void *)cmd, NULL); 1398 if (error != 0) 1399 return error; 1400 } 1401 } 1402 1403 oif_flags = ifp->if_flags; 1404 switch (cmd) { 1405 1406 case SIOCGIFFLAGS: 1407 ifr->ifr_flags = ifp->if_flags; 1408 break; 1409 1410 case SIOCGIFMETRIC: 1411 ifr->ifr_metric = ifp->if_metric; 1412 break; 1413 1414 case SIOCGIFMTU: 1415 ifr->ifr_mtu = ifp->if_mtu; 1416 break; 1417 1418 case SIOCGIFDLT: 1419 ifr->ifr_dlt = ifp->if_dlt; 1420 break; 1421 1422 case SIOCSIFFLAGS: 1423 if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) { 1424 s = splnet(); 1425 if_down(ifp); 1426 splx(s); 1427 } 1428 if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) { 1429 s = splnet(); 1430 if_up(ifp); 1431 splx(s); 1432 } 1433 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 1434 (ifr->ifr_flags &~ IFF_CANTCHANGE); 1435 if (ifp->if_ioctl) 1436 (void)(*ifp->if_ioctl)(ifp, cmd, data); 1437 break; 1438 1439 case SIOCGIFCAP: 1440 ifcr->ifcr_capabilities = ifp->if_capabilities; 1441 ifcr->ifcr_capenable = ifp->if_capenable; 1442 break; 1443 1444 case SIOCSIFCAP: 1445 if ((ifcr->ifcr_capenable & ~ifp->if_capabilities) != 0) 1446 return EINVAL; 1447 if (ifp->if_ioctl == NULL) 1448 return EOPNOTSUPP; 1449 1450 /* Must prevent race with packet reception here. */ 1451 s = splnet(); 1452 if (ifcr->ifcr_capenable != ifp->if_capenable) { 1453 struct ifreq ifrq; 1454 1455 ifrq.ifr_flags = ifp->if_flags; 1456 ifp->if_capenable = ifcr->ifcr_capenable; 1457 1458 /* Pre-compute the checksum flags mask. */ 1459 ifp->if_csum_flags_tx = 0; 1460 ifp->if_csum_flags_rx = 0; 1461 if (ifp->if_capenable & IFCAP_CSUM_IPv4_Tx) { 1462 ifp->if_csum_flags_tx |= M_CSUM_IPv4; 1463 } 1464 if (ifp->if_capenable & IFCAP_CSUM_IPv4_Rx) { 1465 ifp->if_csum_flags_rx |= M_CSUM_IPv4; 1466 } 1467 1468 if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Tx) { 1469 ifp->if_csum_flags_tx |= M_CSUM_TCPv4; 1470 } 1471 if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Rx) { 1472 ifp->if_csum_flags_rx |= M_CSUM_TCPv4; 1473 } 1474 1475 if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Tx) { 1476 ifp->if_csum_flags_tx |= M_CSUM_UDPv4; 1477 } 1478 if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Rx) { 1479 ifp->if_csum_flags_rx |= M_CSUM_UDPv4; 1480 } 1481 1482 if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Tx) { 1483 ifp->if_csum_flags_tx |= M_CSUM_TCPv6; 1484 } 1485 if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Rx) { 1486 ifp->if_csum_flags_rx |= M_CSUM_TCPv6; 1487 } 1488 1489 if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Tx) { 1490 ifp->if_csum_flags_tx |= M_CSUM_UDPv6; 1491 } 1492 if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Rx) { 1493 ifp->if_csum_flags_rx |= M_CSUM_UDPv6; 1494 } 1495 1496 /* 1497 * Only kick the interface if it's up. If it's 1498 * not up now, it will notice the cap enables 1499 * when it is brought up later. 1500 */ 1501 if (ifp->if_flags & IFF_UP) 1502 (void)(*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, 1503 (void *)&ifrq); 1504 } 1505 splx(s); 1506 break; 1507 1508 case SIOCSIFMETRIC: 1509 ifp->if_metric = ifr->ifr_metric; 1510 break; 1511 1512 case SIOCGIFDATA: 1513 ifdr->ifdr_data = ifp->if_data; 1514 break; 1515 1516 case SIOCZIFDATA: 1517 ifdr->ifdr_data = ifp->if_data; 1518 /* 1519 * Assumes that the volatile counters that can be 1520 * zero'ed are at the end of if_data. 1521 */ 1522 memset(&ifp->if_data.ifi_ipackets, 0, sizeof(ifp->if_data) - 1523 offsetof(struct if_data, ifi_ipackets)); 1524 break; 1525 1526 case SIOCSIFMTU: 1527 { 1528 u_long oldmtu = ifp->if_mtu; 1529 1530 if (ifp->if_ioctl == NULL) 1531 return EOPNOTSUPP; 1532 error = (*ifp->if_ioctl)(ifp, cmd, data); 1533 1534 /* 1535 * If the link MTU changed, do network layer specific procedure. 1536 */ 1537 if (ifp->if_mtu != oldmtu) { 1538 #ifdef INET6 1539 nd6_setmtu(ifp); 1540 #endif 1541 } 1542 break; 1543 } 1544 case SIOCSIFPHYADDR: 1545 case SIOCDIFPHYADDR: 1546 #ifdef INET6 1547 case SIOCSIFPHYADDR_IN6: 1548 #endif 1549 case SIOCSLIFPHYADDR: 1550 case SIOCADDMULTI: 1551 case SIOCDELMULTI: 1552 case SIOCSIFMEDIA: 1553 case SIOCGIFPSRCADDR: 1554 case SIOCGIFPDSTADDR: 1555 case SIOCGLIFPHYADDR: 1556 case SIOCGIFMEDIA: 1557 case SIOCG80211: 1558 case SIOCS80211: 1559 case SIOCS80211NWID: 1560 case SIOCS80211NWKEY: 1561 case SIOCS80211POWER: 1562 case SIOCS80211BSSID: 1563 case SIOCS80211CHANNEL: 1564 if (ifp->if_ioctl == NULL) 1565 return EOPNOTSUPP; 1566 error = (*ifp->if_ioctl)(ifp, cmd, data); 1567 break; 1568 1569 case SIOCSDRVSPEC: 1570 default: 1571 if (so->so_proto == NULL) 1572 return EOPNOTSUPP; 1573 #ifdef COMPAT_OSOCK 1574 error = compat_ifioctl(so, ocmd, cmd, data, l); 1575 #else 1576 error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 1577 (struct mbuf *)cmd, (struct mbuf *)data, 1578 (struct mbuf *)ifp, l)); 1579 #endif 1580 break; 1581 } 1582 1583 if (((oif_flags ^ ifp->if_flags) & IFF_UP) != 0) { 1584 #ifdef INET6 1585 if ((ifp->if_flags & IFF_UP) != 0) { 1586 s = splnet(); 1587 in6_if_up(ifp); 1588 splx(s); 1589 } 1590 #endif 1591 } 1592 #ifdef COMPAT_OIFREQ 1593 if (cmd != ocmd) 1594 ifreqn2o(oifr, ifr); 1595 #endif 1596 1597 return error; 1598 } 1599 1600 /* 1601 * Return interface configuration 1602 * of system. List may be used 1603 * in later ioctl's (above) to get 1604 * other information. 1605 */ 1606 /*ARGSUSED*/ 1607 int 1608 ifconf(u_long cmd, void *data) 1609 { 1610 struct ifconf *ifc = (struct ifconf *)data; 1611 struct ifnet *ifp; 1612 struct ifaddr *ifa; 1613 struct ifreq ifr, *ifrp; 1614 int space, error = 0; 1615 const int sz = offsetof(struct ifreq, ifr_ifru) + 1616 sizeof(struct sockaddr); 1617 1618 if ((ifrp = ifc->ifc_req) == NULL) 1619 space = 0; 1620 else 1621 space = ifc->ifc_len; 1622 IFNET_FOREACH(ifp) { 1623 (void)strncpy(ifr.ifr_name, ifp->if_xname, 1624 sizeof(ifr.ifr_name)); 1625 if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0') 1626 return ENAMETOOLONG; 1627 if (TAILQ_EMPTY(&ifp->if_addrlist)) { 1628 memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr)); 1629 if (space >= sz) { 1630 error = copyout(&ifr, ifrp, sz); 1631 if (error != 0) 1632 return (error); 1633 ifrp++; 1634 } 1635 space -= sizeof(struct ifreq); 1636 continue; 1637 } 1638 1639 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 1640 struct sockaddr *sa = ifa->ifa_addr; 1641 if (sa->sa_len <= sizeof(*sa)) { 1642 ifr.ifr_addr = *sa; 1643 if (space >= sz) { 1644 error = copyout(&ifr, ifrp, sz); 1645 ifrp++; 1646 } 1647 space -= sizeof(struct ifreq); 1648 } else { 1649 space -= sa->sa_len - sizeof(*sa) + sz; 1650 if (space < 0) 1651 continue; 1652 error = copyout(&ifr, ifrp, 1653 sizeof(ifr.ifr_name)); 1654 if (error == 0) 1655 error = copyout(sa, 1656 &ifrp->ifr_addr, sa->sa_len); 1657 ifrp = (struct ifreq *) 1658 (sa->sa_len + (char *)&ifrp->ifr_addr); 1659 } 1660 if (error != 0) 1661 return (error); 1662 } 1663 } 1664 if (ifrp != NULL) 1665 ifc->ifc_len -= space; 1666 else 1667 ifc->ifc_len = -space; 1668 return (0); 1669 } 1670 1671 int 1672 ifreq_setaddr(const u_long cmd, struct ifreq *ifr, const struct sockaddr *sa) 1673 { 1674 uint8_t len; 1675 u_long ncmd; 1676 const uint8_t osockspace = sizeof(ifr->ifr_addr); 1677 const uint8_t sockspace = sizeof(ifr->ifr_ifru.ifru_space); 1678 1679 if (cmd == SIOCGIFPSRCADDR_IN6 || cmd == SIOCGIFPDSTADDR_IN6) 1680 len = MIN(sizeof(struct sockaddr_in6), sa->sa_len); 1681 else if ((ncmd = compat_cvtcmd(cmd)) != cmd) 1682 len = MIN(sockspace, sa->sa_len); 1683 else 1684 len = MIN(osockspace, sa->sa_len); 1685 sockaddr_copy(&ifr->ifr_addr, len, sa); 1686 if (len < sa->sa_len) 1687 return EFBIG; 1688 return 0; 1689 } 1690 1691 /* 1692 * Queue message on interface, and start output if interface 1693 * not yet active. 1694 */ 1695 int 1696 ifq_enqueue(struct ifnet *ifp, struct mbuf *m 1697 ALTQ_COMMA ALTQ_DECL(struct altq_pktattr *pktattr)) 1698 { 1699 int len = m->m_pkthdr.len; 1700 int mflags = m->m_flags; 1701 int s = splnet(); 1702 int error; 1703 1704 IFQ_ENQUEUE(&ifp->if_snd, m, pktattr, error); 1705 if (error != 0) 1706 goto out; 1707 ifp->if_obytes += len; 1708 if (mflags & M_MCAST) 1709 ifp->if_omcasts++; 1710 if ((ifp->if_flags & IFF_OACTIVE) == 0) 1711 (*ifp->if_start)(ifp); 1712 out: 1713 splx(s); 1714 return error; 1715 } 1716 1717 /* 1718 * Queue message on interface, possibly using a second fast queue 1719 */ 1720 int 1721 ifq_enqueue2(struct ifnet *ifp, struct ifqueue *ifq, struct mbuf *m 1722 ALTQ_COMMA ALTQ_DECL(struct altq_pktattr *pktattr)) 1723 { 1724 int error = 0; 1725 1726 if (ifq != NULL 1727 #ifdef ALTQ 1728 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 1729 #endif 1730 ) { 1731 if (IF_QFULL(ifq)) { 1732 IF_DROP(&ifp->if_snd); 1733 m_freem(m); 1734 if (error == 0) 1735 error = ENOBUFS; 1736 } else 1737 IF_ENQUEUE(ifq, m); 1738 } else 1739 IFQ_ENQUEUE(&ifp->if_snd, m, pktattr, error); 1740 if (error != 0) { 1741 ++ifp->if_oerrors; 1742 return error; 1743 } 1744 return 0; 1745 } 1746 1747 1748 #if defined(INET) || defined(INET6) 1749 static void 1750 sysctl_net_ifq_setup(struct sysctllog **clog, 1751 int pf, const char *pfname, 1752 int ipn, const char *ipname, 1753 int qid, struct ifqueue *ifq) 1754 { 1755 1756 sysctl_createv(clog, 0, NULL, NULL, 1757 CTLFLAG_PERMANENT, 1758 CTLTYPE_NODE, "net", NULL, 1759 NULL, 0, NULL, 0, 1760 CTL_NET, CTL_EOL); 1761 sysctl_createv(clog, 0, NULL, NULL, 1762 CTLFLAG_PERMANENT, 1763 CTLTYPE_NODE, pfname, NULL, 1764 NULL, 0, NULL, 0, 1765 CTL_NET, pf, CTL_EOL); 1766 sysctl_createv(clog, 0, NULL, NULL, 1767 CTLFLAG_PERMANENT, 1768 CTLTYPE_NODE, ipname, NULL, 1769 NULL, 0, NULL, 0, 1770 CTL_NET, pf, ipn, CTL_EOL); 1771 sysctl_createv(clog, 0, NULL, NULL, 1772 CTLFLAG_PERMANENT, 1773 CTLTYPE_NODE, "ifq", 1774 SYSCTL_DESCR("Protocol input queue controls"), 1775 NULL, 0, NULL, 0, 1776 CTL_NET, pf, ipn, qid, CTL_EOL); 1777 1778 sysctl_createv(clog, 0, NULL, NULL, 1779 CTLFLAG_PERMANENT, 1780 CTLTYPE_INT, "len", 1781 SYSCTL_DESCR("Current input queue length"), 1782 NULL, 0, &ifq->ifq_len, 0, 1783 CTL_NET, pf, ipn, qid, IFQCTL_LEN, CTL_EOL); 1784 sysctl_createv(clog, 0, NULL, NULL, 1785 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1786 CTLTYPE_INT, "maxlen", 1787 SYSCTL_DESCR("Maximum allowed input queue length"), 1788 NULL, 0, &ifq->ifq_maxlen, 0, 1789 CTL_NET, pf, ipn, qid, IFQCTL_MAXLEN, CTL_EOL); 1790 #ifdef notyet 1791 sysctl_createv(clog, 0, NULL, NULL, 1792 CTLFLAG_PERMANENT, 1793 CTLTYPE_INT, "peak", 1794 SYSCTL_DESCR("Highest input queue length"), 1795 NULL, 0, &ifq->ifq_peak, 0, 1796 CTL_NET, pf, ipn, qid, IFQCTL_PEAK, CTL_EOL); 1797 #endif 1798 sysctl_createv(clog, 0, NULL, NULL, 1799 CTLFLAG_PERMANENT, 1800 CTLTYPE_INT, "drops", 1801 SYSCTL_DESCR("Packets dropped due to full input queue"), 1802 NULL, 0, &ifq->ifq_drops, 0, 1803 CTL_NET, pf, ipn, qid, IFQCTL_DROPS, CTL_EOL); 1804 } 1805 1806 #ifdef INET 1807 SYSCTL_SETUP(sysctl_net_inet_ip_ifq_setup, 1808 "sysctl net.inet.ip.ifq subtree setup") 1809 { 1810 extern struct ifqueue ipintrq; 1811 1812 sysctl_net_ifq_setup(clog, PF_INET, "inet", IPPROTO_IP, "ip", 1813 IPCTL_IFQ, &ipintrq); 1814 } 1815 #endif /* INET */ 1816 1817 #ifdef INET6 1818 SYSCTL_SETUP(sysctl_net_inet6_ip6_ifq_setup, 1819 "sysctl net.inet6.ip6.ifq subtree setup") 1820 { 1821 extern struct ifqueue ip6intrq; 1822 1823 sysctl_net_ifq_setup(clog, PF_INET6, "inet6", IPPROTO_IPV6, "ip6", 1824 IPV6CTL_IFQ, &ip6intrq); 1825 } 1826 #endif /* INET6 */ 1827 #endif /* INET || INET6 */ 1828
Indexes created Mon Sep 22 10:09:38 GMT 2025