if.c revision 1.190
1 /* $NetBSD: if.c,v 1.190 2007/06/01 09:35:47 enami 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 1.190 2007/06/01 09:35:47 enami 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 struct callout if_slowtimo_ch; 158 159 int netisr; /* scheduling bits for network */ 160 161 static int if_rt_walktree(struct radix_node *, 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); 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 namelen, masklen; 275 struct sockaddr_dl *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 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + namelen; 288 socksize = masklen + ifp->if_addrlen; 289 #define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1))) 290 if (socksize < sizeof(*sdl)) 291 socksize = sizeof(*sdl); 292 socksize = ROUNDUP(socksize); 293 ifasize = sizeof(*ifa) + 2 * socksize; 294 ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK); 295 memset((void *)ifa, 0, ifasize); 296 sdl = (struct sockaddr_dl *)(ifa + 1); 297 sdl->sdl_len = socksize; 298 sdl->sdl_family = AF_LINK; 299 memcpy(sdl->sdl_data, ifp->if_xname, namelen); 300 sdl->sdl_nlen = namelen; 301 sdl->sdl_alen = ifp->if_addrlen; 302 sdl->sdl_index = ifp->if_index; 303 sdl->sdl_type = ifp->if_type; 304 ifnet_addrs[ifp->if_index] = ifa; 305 IFAREF(ifa); 306 ifa->ifa_ifp = ifp; 307 ifa->ifa_rtrequest = link_rtrequest; 308 TAILQ_INSERT_HEAD(&ifp->if_addrlist, ifa, ifa_list); 309 IFAREF(ifa); 310 ifa->ifa_addr = (struct sockaddr *)sdl; 311 ifp->if_sadl = sdl; 312 sdl = (struct sockaddr_dl *)(socksize + (char *)sdl); 313 ifa->ifa_netmask = (struct sockaddr *)sdl; 314 sdl->sdl_len = masklen; 315 while (namelen != 0) 316 sdl->sdl_data[--namelen] = 0xff; 317 } 318 319 /* 320 * Free the link level name for the specified interface. This is 321 * a detach helper. This is called from if_detach() or from 322 * link layer type specific detach functions. 323 */ 324 void 325 if_free_sadl(struct ifnet *ifp) 326 { 327 struct ifaddr *ifa; 328 int s; 329 330 ifa = ifnet_addrs[ifp->if_index]; 331 if (ifa == NULL) { 332 KASSERT(ifp->if_sadl == NULL); 333 return; 334 } 335 336 KASSERT(ifp->if_sadl != NULL); 337 338 s = splnet(); 339 rtinit(ifa, RTM_DELETE, 0); 340 TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list); 341 IFAFREE(ifa); 342 343 ifp->if_sadl = NULL; 344 345 ifnet_addrs[ifp->if_index] = NULL; 346 IFAFREE(ifa); 347 splx(s); 348 } 349 350 /* 351 * Attach an interface to the 352 * list of "active" interfaces. 353 */ 354 void 355 if_attach(struct ifnet *ifp) 356 { 357 int indexlim = 0; 358 359 if (if_indexlim == 0) { 360 TAILQ_INIT(&ifnet); 361 if_indexlim = 8; 362 } 363 TAILQ_INIT(&ifp->if_addrlist); 364 TAILQ_INSERT_TAIL(&ifnet, ifp, if_list); 365 ifp->if_index = if_index; 366 if (ifindex2ifnet == NULL) 367 if_index++; 368 else 369 while (ifp->if_index < if_indexlim && 370 ifindex2ifnet[ifp->if_index] != NULL) { 371 ++if_index; 372 if (if_index == 0) 373 if_index = 1; 374 /* 375 * If we hit USHRT_MAX, we skip back to 0 since 376 * there are a number of places where the value 377 * of if_index or if_index itself is compared 378 * to or stored in an unsigned short. By 379 * jumping back, we won't botch those assignments 380 * or comparisons. 381 */ 382 else if (if_index == USHRT_MAX) { 383 /* 384 * However, if we have to jump back to 385 * zero *twice* without finding an empty 386 * slot in ifindex2ifnet[], then there 387 * there are too many (>65535) interfaces. 388 */ 389 if (indexlim++) 390 panic("too many interfaces"); 391 else 392 if_index = 1; 393 } 394 ifp->if_index = if_index; 395 } 396 397 /* 398 * We have some arrays that should be indexed by if_index. 399 * since if_index will grow dynamically, they should grow too. 400 * struct ifadd **ifnet_addrs 401 * struct ifnet **ifindex2ifnet 402 */ 403 if (ifnet_addrs == NULL || ifindex2ifnet == NULL || 404 ifp->if_index >= if_indexlim) { 405 size_t m, n, oldlim; 406 void *q; 407 408 oldlim = if_indexlim; 409 while (ifp->if_index >= if_indexlim) 410 if_indexlim <<= 1; 411 412 /* grow ifnet_addrs */ 413 m = oldlim * sizeof(struct ifaddr *); 414 n = if_indexlim * sizeof(struct ifaddr *); 415 q = (void *)malloc(n, M_IFADDR, M_WAITOK); 416 memset(q, 0, n); 417 if (ifnet_addrs != NULL) { 418 memcpy(q, ifnet_addrs, m); 419 free((void *)ifnet_addrs, M_IFADDR); 420 } 421 ifnet_addrs = (struct ifaddr **)q; 422 423 /* grow ifindex2ifnet */ 424 m = oldlim * sizeof(struct ifnet *); 425 n = if_indexlim * sizeof(struct ifnet *); 426 q = (void *)malloc(n, M_IFADDR, M_WAITOK); 427 memset(q, 0, n); 428 if (ifindex2ifnet != NULL) { 429 memcpy(q, (void *)ifindex2ifnet, m); 430 free((void *)ifindex2ifnet, M_IFADDR); 431 } 432 ifindex2ifnet = (struct ifnet **)q; 433 } 434 435 ifindex2ifnet[ifp->if_index] = ifp; 436 437 /* 438 * Link level name is allocated later by a separate call to 439 * if_alloc_sadl(). 440 */ 441 442 if (ifp->if_snd.ifq_maxlen == 0) 443 ifp->if_snd.ifq_maxlen = ifqmaxlen; 444 ifp->if_broadcastaddr = 0; /* reliably crash if used uninitialized */ 445 446 ifp->if_link_state = LINK_STATE_UNKNOWN; 447 448 ifp->if_capenable = 0; 449 ifp->if_csum_flags_tx = 0; 450 ifp->if_csum_flags_rx = 0; 451 452 #ifdef ALTQ 453 ifp->if_snd.altq_type = 0; 454 ifp->if_snd.altq_disc = NULL; 455 ifp->if_snd.altq_flags &= ALTQF_CANTCHANGE; 456 ifp->if_snd.altq_tbr = NULL; 457 ifp->if_snd.altq_ifp = ifp; 458 #endif 459 460 #ifdef PFIL_HOOKS 461 ifp->if_pfil.ph_type = PFIL_TYPE_IFNET; 462 ifp->if_pfil.ph_ifnet = ifp; 463 if (pfil_head_register(&ifp->if_pfil) != 0) 464 printf("%s: WARNING: unable to register pfil hook\n", 465 ifp->if_xname); 466 (void)pfil_run_hooks(&if_pfil, 467 (struct mbuf **)PFIL_IFNET_ATTACH, ifp, PFIL_IFNET); 468 #endif 469 470 if (!STAILQ_EMPTY(&domains)) 471 if_attachdomain1(ifp); 472 473 /* Announce the interface. */ 474 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 475 } 476 477 void 478 if_attachdomain(void) 479 { 480 struct ifnet *ifp; 481 int s; 482 483 s = splnet(); 484 IFNET_FOREACH(ifp) 485 if_attachdomain1(ifp); 486 splx(s); 487 } 488 489 void 490 if_attachdomain1(struct ifnet *ifp) 491 { 492 struct domain *dp; 493 int s; 494 495 s = splnet(); 496 497 /* address family dependent data region */ 498 memset(ifp->if_afdata, 0, sizeof(ifp->if_afdata)); 499 DOMAIN_FOREACH(dp) { 500 if (dp->dom_ifattach != NULL) 501 ifp->if_afdata[dp->dom_family] = 502 (*dp->dom_ifattach)(ifp); 503 } 504 505 splx(s); 506 } 507 508 /* 509 * Deactivate an interface. This points all of the procedure 510 * handles at error stubs. May be called from interrupt context. 511 */ 512 void 513 if_deactivate(struct ifnet *ifp) 514 { 515 int s; 516 517 s = splnet(); 518 519 ifp->if_output = if_nulloutput; 520 ifp->if_input = if_nullinput; 521 ifp->if_start = if_nullstart; 522 ifp->if_ioctl = if_nullioctl; 523 ifp->if_init = if_nullinit; 524 ifp->if_stop = if_nullstop; 525 ifp->if_watchdog = if_nullwatchdog; 526 ifp->if_drain = if_nulldrain; 527 528 /* No more packets may be enqueued. */ 529 ifp->if_snd.ifq_maxlen = 0; 530 531 splx(s); 532 } 533 534 /* 535 * Detach an interface from the list of "active" interfaces, 536 * freeing any resources as we go along. 537 * 538 * NOTE: This routine must be called with a valid thread context, 539 * as it may block. 540 */ 541 void 542 if_detach(struct ifnet *ifp) 543 { 544 struct socket so; 545 struct ifaddr *ifa; 546 #ifdef IFAREF_DEBUG 547 struct ifaddr *last_ifa = NULL; 548 #endif 549 struct domain *dp; 550 const struct protosw *pr; 551 struct radix_node_head *rnh; 552 int s, i, family, purged; 553 554 /* 555 * XXX It's kind of lame that we have to have the 556 * XXX socket structure... 557 */ 558 memset(&so, 0, sizeof(so)); 559 560 s = splnet(); 561 562 /* 563 * Do an if_down() to give protocols a chance to do something. 564 */ 565 if_down(ifp); 566 567 #ifdef ALTQ 568 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 569 altq_disable(&ifp->if_snd); 570 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 571 altq_detach(&ifp->if_snd); 572 #endif 573 574 575 #if NCARP > 0 576 /* Remove the interface from any carp group it is a part of. */ 577 if (ifp->if_carp != NULL && ifp->if_type != IFT_CARP) 578 carp_ifdetach(ifp); 579 #endif 580 581 /* 582 * Rip all the addresses off the interface. This should make 583 * all of the routes go away. 584 * 585 * pr_usrreq calls can remove an arbitrary number of ifaddrs 586 * from the list, including our "cursor", ifa. For safety, 587 * and to honor the TAILQ abstraction, I just restart the 588 * loop after each removal. Note that the loop will exit 589 * when all of the remaining ifaddrs belong to the AF_LINK 590 * family. I am counting on the historical fact that at 591 * least one pr_usrreq in each address domain removes at 592 * least one ifaddr. 593 */ 594 again: 595 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 596 family = ifa->ifa_addr->sa_family; 597 #ifdef IFAREF_DEBUG 598 printf("if_detach: ifaddr %p, family %d, refcnt %d\n", 599 ifa, family, ifa->ifa_refcnt); 600 if (last_ifa != NULL && ifa == last_ifa) 601 panic("if_detach: loop detected"); 602 last_ifa = ifa; 603 #endif 604 if (family == AF_LINK) 605 continue; 606 dp = pffinddomain(family); 607 #ifdef DIAGNOSTIC 608 if (dp == NULL) 609 panic("if_detach: no domain for AF %d", 610 family); 611 #endif 612 /* 613 * XXX These PURGEIF calls are redundant with the 614 * purge-all-families calls below, but are left in for 615 * now both to make a smaller change, and to avoid 616 * unplanned interactions with clearing of 617 * ifp->if_addrlist. 618 */ 619 purged = 0; 620 for (pr = dp->dom_protosw; 621 pr < dp->dom_protoswNPROTOSW; pr++) { 622 so.so_proto = pr; 623 if (pr->pr_usrreq != NULL) { 624 (void) (*pr->pr_usrreq)(&so, 625 PRU_PURGEIF, NULL, NULL, 626 (struct mbuf *) ifp, curlwp); 627 purged = 1; 628 } 629 } 630 if (purged == 0) { 631 /* 632 * XXX What's really the best thing to do 633 * XXX here? --thorpej (at) NetBSD.org 634 */ 635 printf("if_detach: WARNING: AF %d not purged\n", 636 family); 637 TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list); 638 } 639 goto again; 640 } 641 642 if_free_sadl(ifp); 643 644 /* Walk the routing table looking for stragglers. */ 645 for (i = 0; i <= AF_MAX; i++) { 646 if ((rnh = rt_tables[i]) != NULL) 647 (void) (*rnh->rnh_walktree)(rnh, if_rt_walktree, ifp); 648 } 649 650 DOMAIN_FOREACH(dp) { 651 if (dp->dom_ifdetach != NULL && ifp->if_afdata[dp->dom_family]) 652 (*dp->dom_ifdetach)(ifp, 653 ifp->if_afdata[dp->dom_family]); 654 655 /* 656 * One would expect multicast memberships (INET and 657 * INET6) on UDP sockets to be purged by the PURGEIF 658 * calls above, but if all addresses were removed from 659 * the interface prior to destruction, the calls will 660 * not be made (e.g. ppp, for which pppd(8) generally 661 * removes addresses before destroying the interface). 662 * Because there is no invariant that multicast 663 * memberships only exist for interfaces with IPv4 664 * addresses, we must call PURGEIF regardless of 665 * addresses. (Protocols which might store ifnet 666 * pointers are marked with PR_PURGEIF.) 667 */ 668 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { 669 so.so_proto = pr; 670 if (pr->pr_usrreq != NULL && pr->pr_flags & PR_PURGEIF) 671 (void)(*pr->pr_usrreq)(&so, PRU_PURGEIF, NULL, 672 NULL, (struct mbuf *)ifp, curlwp); 673 } 674 } 675 676 #ifdef PFIL_HOOKS 677 (void)pfil_run_hooks(&if_pfil, 678 (struct mbuf **)PFIL_IFNET_DETACH, ifp, PFIL_IFNET); 679 (void)pfil_head_unregister(&ifp->if_pfil); 680 #endif 681 682 /* Announce that the interface is gone. */ 683 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 684 685 ifindex2ifnet[ifp->if_index] = NULL; 686 687 TAILQ_REMOVE(&ifnet, ifp, if_list); 688 689 /* 690 * remove packets that came from ifp, from software interrupt queues. 691 */ 692 DOMAIN_FOREACH(dp) { 693 for (i = 0; i < __arraycount(dp->dom_ifqueues); i++) { 694 if (dp->dom_ifqueues[i] == NULL) 695 break; 696 if_detach_queues(ifp, dp->dom_ifqueues[i]); 697 } 698 } 699 700 splx(s); 701 } 702 703 static void 704 if_detach_queues(struct ifnet *ifp, struct ifqueue *q) 705 { 706 struct mbuf *m, *prev, *next; 707 708 prev = NULL; 709 for (m = q->ifq_head; m != NULL; m = next) { 710 next = m->m_nextpkt; 711 #ifdef DIAGNOSTIC 712 if ((m->m_flags & M_PKTHDR) == 0) { 713 prev = m; 714 continue; 715 } 716 #endif 717 if (m->m_pkthdr.rcvif != ifp) { 718 prev = m; 719 continue; 720 } 721 722 if (prev != NULL) 723 prev->m_nextpkt = m->m_nextpkt; 724 else 725 q->ifq_head = m->m_nextpkt; 726 if (q->ifq_tail == m) 727 q->ifq_tail = prev; 728 q->ifq_len--; 729 730 m->m_nextpkt = NULL; 731 m_freem(m); 732 IF_DROP(q); 733 } 734 } 735 736 /* 737 * Callback for a radix tree walk to delete all references to an 738 * ifnet. 739 */ 740 static int 741 if_rt_walktree(struct radix_node *rn, void *v) 742 { 743 struct ifnet *ifp = (struct ifnet *)v; 744 struct rtentry *rt = (struct rtentry *)rn; 745 int error; 746 747 if (rt->rt_ifp != ifp) 748 return 0; 749 750 /* Delete the entry. */ 751 ++rt->rt_refcnt; 752 error = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, 753 rt_mask(rt), rt->rt_flags, NULL); 754 KASSERT((rt->rt_flags & RTF_UP) == 0); 755 rt->rt_ifp = NULL; 756 RTFREE(rt); 757 if (error != 0) 758 printf("%s: warning: unable to delete rtentry @ %p, " 759 "error = %d\n", ifp->if_xname, rt, error); 760 return 0; 761 } 762 763 /* 764 * Create a clone network interface. 765 */ 766 int 767 if_clone_create(const char *name) 768 { 769 struct if_clone *ifc; 770 int unit; 771 772 ifc = if_clone_lookup(name, &unit); 773 if (ifc == NULL) 774 return EINVAL; 775 776 if (ifunit(name) != NULL) 777 return EEXIST; 778 779 return (*ifc->ifc_create)(ifc, unit); 780 } 781 782 /* 783 * Destroy a clone network interface. 784 */ 785 int 786 if_clone_destroy(const char *name) 787 { 788 struct if_clone *ifc; 789 struct ifnet *ifp; 790 791 ifc = if_clone_lookup(name, NULL); 792 if (ifc == NULL) 793 return EINVAL; 794 795 ifp = ifunit(name); 796 if (ifp == NULL) 797 return ENXIO; 798 799 if (ifc->ifc_destroy == NULL) 800 return EOPNOTSUPP; 801 802 return (*ifc->ifc_destroy)(ifp); 803 } 804 805 /* 806 * Look up a network interface cloner. 807 */ 808 static struct if_clone * 809 if_clone_lookup(const char *name, int *unitp) 810 { 811 struct if_clone *ifc; 812 const char *cp; 813 int unit; 814 815 /* separate interface name from unit */ 816 for (cp = name; 817 cp - name < IFNAMSIZ && *cp && (*cp < '0' || *cp > '9'); 818 cp++) 819 continue; 820 821 if (cp == name || cp - name == IFNAMSIZ || !*cp) 822 return NULL; /* No name or unit number */ 823 824 LIST_FOREACH(ifc, &if_cloners, ifc_list) { 825 if (strlen(ifc->ifc_name) == cp - name && 826 strncmp(name, ifc->ifc_name, cp - name) == 0) 827 break; 828 } 829 830 if (ifc == NULL) 831 return NULL; 832 833 unit = 0; 834 while (cp - name < IFNAMSIZ && *cp) { 835 if (*cp < '0' || *cp > '9' || unit > INT_MAX / 10) { 836 /* Bogus unit number. */ 837 return NULL; 838 } 839 unit = (unit * 10) + (*cp++ - '0'); 840 } 841 842 if (unitp != NULL) 843 *unitp = unit; 844 return ifc; 845 } 846 847 /* 848 * Register a network interface cloner. 849 */ 850 void 851 if_clone_attach(struct if_clone *ifc) 852 { 853 854 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list); 855 if_cloners_count++; 856 } 857 858 /* 859 * Unregister a network interface cloner. 860 */ 861 void 862 if_clone_detach(struct if_clone *ifc) 863 { 864 865 LIST_REMOVE(ifc, ifc_list); 866 if_cloners_count--; 867 } 868 869 /* 870 * Provide list of interface cloners to userspace. 871 */ 872 static int 873 if_clone_list(struct if_clonereq *ifcr) 874 { 875 char outbuf[IFNAMSIZ], *dst; 876 struct if_clone *ifc; 877 int count, error = 0; 878 879 ifcr->ifcr_total = if_cloners_count; 880 if ((dst = ifcr->ifcr_buffer) == NULL) { 881 /* Just asking how many there are. */ 882 return 0; 883 } 884 885 if (ifcr->ifcr_count < 0) 886 return EINVAL; 887 888 count = (if_cloners_count < ifcr->ifcr_count) ? 889 if_cloners_count : ifcr->ifcr_count; 890 891 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0; 892 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) { 893 (void)strncpy(outbuf, ifc->ifc_name, sizeof(outbuf)); 894 if (outbuf[sizeof(outbuf) - 1] != '\0') 895 return ENAMETOOLONG; 896 error = copyout(outbuf, dst, sizeof(outbuf)); 897 if (error != 0) 898 break; 899 } 900 901 return error; 902 } 903 904 /* 905 * Locate an interface based on a complete address. 906 */ 907 /*ARGSUSED*/ 908 struct ifaddr * 909 ifa_ifwithaddr(const struct sockaddr *addr) 910 { 911 struct ifnet *ifp; 912 struct ifaddr *ifa; 913 914 #define equal(a1, a2) \ 915 (memcmp((a1), (a2), ((const struct sockaddr *)(a1))->sa_len) == 0) 916 917 IFNET_FOREACH(ifp) { 918 if (ifp->if_output == if_nulloutput) 919 continue; 920 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 921 if (ifa->ifa_addr->sa_family != addr->sa_family) 922 continue; 923 if (equal(addr, ifa->ifa_addr)) 924 return ifa; 925 if ((ifp->if_flags & IFF_BROADCAST) && 926 ifa->ifa_broadaddr && 927 /* IP6 doesn't have broadcast */ 928 ifa->ifa_broadaddr->sa_len != 0 && 929 equal(ifa->ifa_broadaddr, addr)) 930 return ifa; 931 } 932 } 933 return NULL; 934 } 935 936 /* 937 * Locate the point to point interface with a given destination address. 938 */ 939 /*ARGSUSED*/ 940 struct ifaddr * 941 ifa_ifwithdstaddr(const struct sockaddr *addr) 942 { 943 struct ifnet *ifp; 944 struct ifaddr *ifa; 945 946 IFNET_FOREACH(ifp) { 947 if (ifp->if_output == if_nulloutput) 948 continue; 949 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 950 continue; 951 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 952 if (ifa->ifa_addr->sa_family != addr->sa_family || 953 ifa->ifa_dstaddr == NULL) 954 continue; 955 if (equal(addr, ifa->ifa_dstaddr)) 956 return ifa; 957 } 958 } 959 return NULL; 960 } 961 962 /* 963 * Find an interface on a specific network. If many, choice 964 * is most specific found. 965 */ 966 struct ifaddr * 967 ifa_ifwithnet(const struct sockaddr *addr) 968 { 969 struct ifnet *ifp; 970 struct ifaddr *ifa; 971 const struct sockaddr_dl *sdl; 972 struct ifaddr *ifa_maybe = 0; 973 u_int af = addr->sa_family; 974 const char *addr_data = addr->sa_data, *cplim; 975 976 if (af == AF_LINK) { 977 sdl = (const struct sockaddr_dl *)addr; 978 if (sdl->sdl_index && sdl->sdl_index < if_indexlim && 979 ifindex2ifnet[sdl->sdl_index] && 980 ifindex2ifnet[sdl->sdl_index]->if_output != if_nulloutput) 981 return ifnet_addrs[sdl->sdl_index]; 982 } 983 #ifdef NETATALK 984 if (af == AF_APPLETALK) { 985 const struct sockaddr_at *sat, *sat2; 986 sat = (const struct sockaddr_at *)addr; 987 IFNET_FOREACH(ifp) { 988 if (ifp->if_output == if_nulloutput) 989 continue; 990 ifa = at_ifawithnet((const struct sockaddr_at *)addr, ifp); 991 if (ifa == NULL) 992 continue; 993 sat2 = (struct sockaddr_at *)ifa->ifa_addr; 994 if (sat2->sat_addr.s_net == sat->sat_addr.s_net) 995 return ifa; /* exact match */ 996 if (ifa_maybe == NULL) { 997 /* else keep the if with the right range */ 998 ifa_maybe = ifa; 999 } 1000 } 1001 return ifa_maybe; 1002 } 1003 #endif 1004 IFNET_FOREACH(ifp) { 1005 if (ifp->if_output == if_nulloutput) 1006 continue; 1007 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 1008 const char *cp, *cp2, *cp3; 1009 1010 if (ifa->ifa_addr->sa_family != af || 1011 ifa->ifa_netmask == NULL) 1012 next: continue; 1013 cp = addr_data; 1014 cp2 = ifa->ifa_addr->sa_data; 1015 cp3 = ifa->ifa_netmask->sa_data; 1016 cplim = (const char *)ifa->ifa_netmask + 1017 ifa->ifa_netmask->sa_len; 1018 while (cp3 < cplim) { 1019 if ((*cp++ ^ *cp2++) & *cp3++) { 1020 /* want to continue for() loop */ 1021 goto next; 1022 } 1023 } 1024 if (ifa_maybe == NULL || 1025 rn_refines((void *)ifa->ifa_netmask, 1026 (void *)ifa_maybe->ifa_netmask)) 1027 ifa_maybe = ifa; 1028 } 1029 } 1030 return ifa_maybe; 1031 } 1032 1033 /* 1034 * Find the interface of the addresss. 1035 */ 1036 struct ifaddr * 1037 ifa_ifwithladdr(const struct sockaddr *addr) 1038 { 1039 struct ifaddr *ia; 1040 1041 if ((ia = ifa_ifwithaddr(addr)) || (ia = ifa_ifwithdstaddr(addr)) || 1042 (ia = ifa_ifwithnet(addr))) 1043 return ia; 1044 return NULL; 1045 } 1046 1047 /* 1048 * Find an interface using a specific address family 1049 */ 1050 struct ifaddr * 1051 ifa_ifwithaf(int af) 1052 { 1053 struct ifnet *ifp; 1054 struct ifaddr *ifa; 1055 1056 IFNET_FOREACH(ifp) { 1057 if (ifp->if_output == if_nulloutput) 1058 continue; 1059 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 1060 if (ifa->ifa_addr->sa_family == af) 1061 return ifa; 1062 } 1063 } 1064 return NULL; 1065 } 1066 1067 /* 1068 * Find an interface address specific to an interface best matching 1069 * a given address. 1070 */ 1071 struct ifaddr * 1072 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp) 1073 { 1074 struct ifaddr *ifa; 1075 const char *cp, *cp2, *cp3; 1076 const char *cplim; 1077 struct ifaddr *ifa_maybe = 0; 1078 u_int af = addr->sa_family; 1079 1080 if (ifp->if_output == if_nulloutput) 1081 return NULL; 1082 1083 if (af >= AF_MAX) 1084 return NULL; 1085 1086 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 1087 if (ifa->ifa_addr->sa_family != af) 1088 continue; 1089 ifa_maybe = ifa; 1090 if (ifa->ifa_netmask == NULL) { 1091 if (equal(addr, ifa->ifa_addr) || 1092 (ifa->ifa_dstaddr && 1093 equal(addr, ifa->ifa_dstaddr))) 1094 return ifa; 1095 continue; 1096 } 1097 cp = addr->sa_data; 1098 cp2 = ifa->ifa_addr->sa_data; 1099 cp3 = ifa->ifa_netmask->sa_data; 1100 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1101 for (; cp3 < cplim; cp3++) { 1102 if ((*cp++ ^ *cp2++) & *cp3) 1103 break; 1104 } 1105 if (cp3 == cplim) 1106 return ifa; 1107 } 1108 return ifa_maybe; 1109 } 1110 1111 /* 1112 * Default action when installing a route with a Link Level gateway. 1113 * Lookup an appropriate real ifa to point to. 1114 * This should be moved to /sys/net/link.c eventually. 1115 */ 1116 void 1117 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 1118 { 1119 struct ifaddr *ifa; 1120 struct sockaddr *dst; 1121 struct ifnet *ifp; 1122 1123 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == NULL) || 1124 ((ifp = ifa->ifa_ifp) == NULL) || ((dst = rt_key(rt)) == NULL)) 1125 return; 1126 if ((ifa = ifaof_ifpforaddr(dst, ifp)) != NULL) { 1127 rt_replace_ifa(rt, ifa); 1128 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1129 ifa->ifa_rtrequest(cmd, rt, info); 1130 } 1131 } 1132 1133 /* 1134 * Handle a change in the interface link state. 1135 */ 1136 void 1137 if_link_state_change(struct ifnet *ifp, int link_state) 1138 { 1139 if (ifp->if_link_state == link_state) 1140 return; 1141 ifp->if_link_state = link_state; 1142 /* Notify that the link state has changed. */ 1143 rt_ifmsg(ifp); 1144 #if NCARP > 0 1145 if (ifp->if_carp) 1146 carp_carpdev_state(ifp); 1147 #endif 1148 } 1149 1150 /* 1151 * Mark an interface down and notify protocols of 1152 * the transition. 1153 * NOTE: must be called at splsoftnet or equivalent. 1154 */ 1155 void 1156 if_down(struct ifnet *ifp) 1157 { 1158 struct ifaddr *ifa; 1159 1160 ifp->if_flags &= ~IFF_UP; 1161 microtime(&ifp->if_lastchange); 1162 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 1163 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1164 IFQ_PURGE(&ifp->if_snd); 1165 #if NCARP > 0 1166 if (ifp->if_carp) 1167 carp_carpdev_state(ifp); 1168 #endif 1169 rt_ifmsg(ifp); 1170 } 1171 1172 /* 1173 * Mark an interface up and notify protocols of 1174 * the transition. 1175 * NOTE: must be called at splsoftnet or equivalent. 1176 */ 1177 void 1178 if_up(struct ifnet *ifp) 1179 { 1180 #ifdef notyet 1181 struct ifaddr *ifa; 1182 #endif 1183 1184 ifp->if_flags |= IFF_UP; 1185 microtime(&ifp->if_lastchange); 1186 #ifdef notyet 1187 /* this has no effect on IP, and will kill all ISO connections XXX */ 1188 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 1189 pfctlinput(PRC_IFUP, ifa->ifa_addr); 1190 #endif 1191 #if NCARP > 0 1192 if (ifp->if_carp) 1193 carp_carpdev_state(ifp); 1194 #endif 1195 rt_ifmsg(ifp); 1196 #ifdef INET6 1197 in6_if_up(ifp); 1198 #endif 1199 } 1200 1201 /* 1202 * Handle interface watchdog timer routines. Called 1203 * from softclock, we decrement timers (if set) and 1204 * call the appropriate interface routine on expiration. 1205 */ 1206 void 1207 if_slowtimo(void *arg) 1208 { 1209 struct ifnet *ifp; 1210 int s = splnet(); 1211 1212 IFNET_FOREACH(ifp) { 1213 if (ifp->if_timer == 0 || --ifp->if_timer) 1214 continue; 1215 if (ifp->if_watchdog != NULL) 1216 (*ifp->if_watchdog)(ifp); 1217 } 1218 splx(s); 1219 callout_reset(&if_slowtimo_ch, hz / IFNET_SLOWHZ, if_slowtimo, NULL); 1220 } 1221 1222 /* 1223 * Set/clear promiscuous mode on interface ifp based on the truth value 1224 * of pswitch. The calls are reference counted so that only the first 1225 * "on" request actually has an effect, as does the final "off" request. 1226 * Results are undefined if the "off" and "on" requests are not matched. 1227 */ 1228 int 1229 ifpromisc(struct ifnet *ifp, int pswitch) 1230 { 1231 int pcount, ret; 1232 short flags; 1233 struct ifreq ifr; 1234 1235 pcount = ifp->if_pcount; 1236 flags = ifp->if_flags; 1237 if (pswitch) { 1238 /* 1239 * Allow the device to be "placed" into promiscuous 1240 * mode even if it is not configured up. It will 1241 * consult IFF_PROMISC when it is is brought up. 1242 */ 1243 if (ifp->if_pcount++ != 0) 1244 return 0; 1245 ifp->if_flags |= IFF_PROMISC; 1246 if ((ifp->if_flags & IFF_UP) == 0) 1247 return 0; 1248 } else { 1249 if (--ifp->if_pcount > 0) 1250 return 0; 1251 ifp->if_flags &= ~IFF_PROMISC; 1252 /* 1253 * If the device is not configured up, we should not need to 1254 * turn off promiscuous mode (device should have turned it 1255 * off when interface went down; and will look at IFF_PROMISC 1256 * again next time interface comes up). 1257 */ 1258 if ((ifp->if_flags & IFF_UP) == 0) 1259 return 0; 1260 } 1261 memset(&ifr, 0, sizeof(ifr)); 1262 ifr.ifr_flags = ifp->if_flags; 1263 ret = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (void *) &ifr); 1264 /* Restore interface state if not successful. */ 1265 if (ret != 0) { 1266 ifp->if_pcount = pcount; 1267 ifp->if_flags = flags; 1268 } 1269 return ret; 1270 } 1271 1272 /* 1273 * Map interface name to 1274 * interface structure pointer. 1275 */ 1276 struct ifnet * 1277 ifunit(const char *name) 1278 { 1279 struct ifnet *ifp; 1280 const char *cp = name; 1281 u_int unit = 0; 1282 u_int i; 1283 1284 /* 1285 * If the entire name is a number, treat it as an ifindex. 1286 */ 1287 for (i = 0; i < IFNAMSIZ && *cp >= '0' && *cp <= '9'; i++, cp++) { 1288 unit = unit * 10 + (*cp - '0'); 1289 } 1290 1291 /* 1292 * If the number took all of the name, then it's a valid ifindex. 1293 */ 1294 if (i == IFNAMSIZ || (cp != name && *cp == '\0')) { 1295 if (unit >= if_indexlim) 1296 return NULL; 1297 ifp = ifindex2ifnet[unit]; 1298 if (ifp == NULL || ifp->if_output == if_nulloutput) 1299 return NULL; 1300 return ifp; 1301 } 1302 1303 IFNET_FOREACH(ifp) { 1304 if (ifp->if_output == if_nulloutput) 1305 continue; 1306 if (strcmp(ifp->if_xname, name) == 0) 1307 return ifp; 1308 } 1309 return NULL; 1310 } 1311 1312 /* 1313 * Interface ioctls. 1314 */ 1315 int 1316 ifioctl(struct socket *so, u_long cmd, void *data, struct lwp *l) 1317 { 1318 struct ifnet *ifp; 1319 struct ifreq *ifr; 1320 struct ifcapreq *ifcr; 1321 struct ifdatareq *ifdr; 1322 int s, error = 0; 1323 u_long ocmd; 1324 short oif_flags; 1325 #ifdef COMPAT_OIFREQ 1326 struct ifreq ifrb; 1327 struct oifreq *oifr = NULL; 1328 #endif 1329 1330 switch (cmd) { 1331 #ifdef COMPAT_OIFREQ 1332 case OSIOCGIFCONF: 1333 case OOSIOCGIFCONF: 1334 return compat_ifconf(cmd, data); 1335 #endif 1336 case SIOCGIFCONF: 1337 return ifconf(cmd, data); 1338 } 1339 ocmd = cmd; 1340 #ifdef COMPAT_OIFREQ 1341 cmd = cvtcmd(cmd); 1342 if (cmd != ocmd) { 1343 oifr = data; 1344 data = ifr = &ifrb; 1345 ifreqo2n(oifr, ifr); 1346 #ifdef DEBUG_OIFREQ 1347 printf("ifioctl ocmd = %lx cmd = %lx '%c' %u\n", 1348 ocmd, cmd, (char)IOCGROUP(cmd), (u_int)(cmd & 0xff)); 1349 #endif 1350 } else 1351 #endif 1352 ifr = data; 1353 ifcr = data; 1354 ifdr = data; 1355 1356 ifp = ifunit(ifr->ifr_name); 1357 1358 switch (cmd) { 1359 case SIOCIFCREATE: 1360 case SIOCIFDESTROY: 1361 if (l != NULL) { 1362 error = kauth_authorize_network(l->l_cred, 1363 KAUTH_NETWORK_INTERFACE, 1364 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, 1365 (void *)cmd, NULL); 1366 if (error != 0) 1367 return error; 1368 } 1369 return (cmd == SIOCIFCREATE) ? 1370 if_clone_create(ifr->ifr_name) : 1371 if_clone_destroy(ifr->ifr_name); 1372 1373 case SIOCIFGCLONERS: 1374 return if_clone_list((struct if_clonereq *)data); 1375 } 1376 1377 if (ifp == NULL) 1378 return ENXIO; 1379 1380 switch (cmd) { 1381 case SIOCSIFFLAGS: 1382 case SIOCSIFCAP: 1383 case SIOCSIFMETRIC: 1384 case SIOCZIFDATA: 1385 case SIOCSIFMTU: 1386 case SIOCSIFPHYADDR: 1387 case SIOCDIFPHYADDR: 1388 #ifdef INET6 1389 case SIOCSIFPHYADDR_IN6: 1390 #endif 1391 case SIOCSLIFPHYADDR: 1392 case SIOCADDMULTI: 1393 case SIOCDELMULTI: 1394 case SIOCSIFMEDIA: 1395 case SIOCSDRVSPEC: 1396 case SIOCS80211NWID: 1397 case SIOCS80211NWKEY: 1398 case SIOCS80211POWER: 1399 case SIOCS80211BSSID: 1400 case SIOCS80211CHANNEL: 1401 if (l != NULL) { 1402 error = kauth_authorize_network(l->l_cred, 1403 KAUTH_NETWORK_INTERFACE, 1404 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, 1405 (void *)cmd, NULL); 1406 if (error != 0) 1407 return error; 1408 } 1409 } 1410 1411 oif_flags = ifp->if_flags; 1412 switch (cmd) { 1413 1414 case SIOCGIFFLAGS: 1415 ifr->ifr_flags = ifp->if_flags; 1416 break; 1417 1418 case SIOCGIFMETRIC: 1419 ifr->ifr_metric = ifp->if_metric; 1420 break; 1421 1422 case SIOCGIFMTU: 1423 ifr->ifr_mtu = ifp->if_mtu; 1424 break; 1425 1426 case SIOCGIFDLT: 1427 ifr->ifr_dlt = ifp->if_dlt; 1428 break; 1429 1430 case SIOCSIFFLAGS: 1431 if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) { 1432 s = splnet(); 1433 if_down(ifp); 1434 splx(s); 1435 } 1436 if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) { 1437 s = splnet(); 1438 if_up(ifp); 1439 splx(s); 1440 } 1441 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 1442 (ifr->ifr_flags &~ IFF_CANTCHANGE); 1443 if (ifp->if_ioctl) 1444 (void)(*ifp->if_ioctl)(ifp, cmd, data); 1445 break; 1446 1447 case SIOCGIFCAP: 1448 ifcr->ifcr_capabilities = ifp->if_capabilities; 1449 ifcr->ifcr_capenable = ifp->if_capenable; 1450 break; 1451 1452 case SIOCSIFCAP: 1453 if ((ifcr->ifcr_capenable & ~ifp->if_capabilities) != 0) 1454 return EINVAL; 1455 if (ifp->if_ioctl == NULL) 1456 return EOPNOTSUPP; 1457 1458 /* Must prevent race with packet reception here. */ 1459 s = splnet(); 1460 if (ifcr->ifcr_capenable != ifp->if_capenable) { 1461 struct ifreq ifrq; 1462 1463 ifrq.ifr_flags = ifp->if_flags; 1464 ifp->if_capenable = ifcr->ifcr_capenable; 1465 1466 /* Pre-compute the checksum flags mask. */ 1467 ifp->if_csum_flags_tx = 0; 1468 ifp->if_csum_flags_rx = 0; 1469 if (ifp->if_capenable & IFCAP_CSUM_IPv4_Tx) { 1470 ifp->if_csum_flags_tx |= M_CSUM_IPv4; 1471 } 1472 if (ifp->if_capenable & IFCAP_CSUM_IPv4_Rx) { 1473 ifp->if_csum_flags_rx |= M_CSUM_IPv4; 1474 } 1475 1476 if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Tx) { 1477 ifp->if_csum_flags_tx |= M_CSUM_TCPv4; 1478 } 1479 if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Rx) { 1480 ifp->if_csum_flags_rx |= M_CSUM_TCPv4; 1481 } 1482 1483 if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Tx) { 1484 ifp->if_csum_flags_tx |= M_CSUM_UDPv4; 1485 } 1486 if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Rx) { 1487 ifp->if_csum_flags_rx |= M_CSUM_UDPv4; 1488 } 1489 1490 if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Tx) { 1491 ifp->if_csum_flags_tx |= M_CSUM_TCPv6; 1492 } 1493 if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Rx) { 1494 ifp->if_csum_flags_rx |= M_CSUM_TCPv6; 1495 } 1496 1497 if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Tx) { 1498 ifp->if_csum_flags_tx |= M_CSUM_UDPv6; 1499 } 1500 if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Rx) { 1501 ifp->if_csum_flags_rx |= M_CSUM_UDPv6; 1502 } 1503 1504 /* 1505 * Only kick the interface if it's up. If it's 1506 * not up now, it will notice the cap enables 1507 * when it is brought up later. 1508 */ 1509 if (ifp->if_flags & IFF_UP) 1510 (void)(*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, 1511 (void *)&ifrq); 1512 } 1513 splx(s); 1514 break; 1515 1516 case SIOCSIFMETRIC: 1517 ifp->if_metric = ifr->ifr_metric; 1518 break; 1519 1520 case SIOCGIFDATA: 1521 ifdr->ifdr_data = ifp->if_data; 1522 break; 1523 1524 case SIOCZIFDATA: 1525 ifdr->ifdr_data = ifp->if_data; 1526 /* 1527 * Assumes that the volatile counters that can be 1528 * zero'ed are at the end of if_data. 1529 */ 1530 memset(&ifp->if_data.ifi_ipackets, 0, sizeof(ifp->if_data) - 1531 offsetof(struct if_data, ifi_ipackets)); 1532 break; 1533 1534 case SIOCSIFMTU: 1535 { 1536 u_long oldmtu = ifp->if_mtu; 1537 1538 if (ifp->if_ioctl == NULL) 1539 return EOPNOTSUPP; 1540 error = (*ifp->if_ioctl)(ifp, cmd, data); 1541 1542 /* 1543 * If the link MTU changed, do network layer specific procedure. 1544 */ 1545 if (ifp->if_mtu != oldmtu) { 1546 #ifdef INET6 1547 nd6_setmtu(ifp); 1548 #endif 1549 } 1550 break; 1551 } 1552 case SIOCSIFPHYADDR: 1553 case SIOCDIFPHYADDR: 1554 #ifdef INET6 1555 case SIOCSIFPHYADDR_IN6: 1556 #endif 1557 case SIOCSLIFPHYADDR: 1558 case SIOCADDMULTI: 1559 case SIOCDELMULTI: 1560 case SIOCSIFMEDIA: 1561 case SIOCGIFPSRCADDR: 1562 case SIOCGIFPDSTADDR: 1563 case SIOCGLIFPHYADDR: 1564 case SIOCGIFMEDIA: 1565 if (ifp->if_ioctl == NULL) 1566 return EOPNOTSUPP; 1567 error = (*ifp->if_ioctl)(ifp, cmd, data); 1568 break; 1569 1570 case SIOCSDRVSPEC: 1571 case SIOCS80211NWID: 1572 case SIOCS80211NWKEY: 1573 case SIOCS80211POWER: 1574 case SIOCS80211BSSID: 1575 case SIOCS80211CHANNEL: 1576 default: 1577 if (so->so_proto == NULL) 1578 return EOPNOTSUPP; 1579 #ifdef COMPAT_OSOCK 1580 error = compat_ifioctl(so, ocmd, cmd, data, l); 1581 #else 1582 error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 1583 (struct mbuf *)cmd, (struct mbuf *)data, 1584 (struct mbuf *)ifp, l)); 1585 #endif 1586 break; 1587 } 1588 1589 if (((oif_flags ^ ifp->if_flags) & IFF_UP) != 0) { 1590 #ifdef INET6 1591 if ((ifp->if_flags & IFF_UP) != 0) { 1592 s = splnet(); 1593 in6_if_up(ifp); 1594 splx(s); 1595 } 1596 #endif 1597 } 1598 #ifdef COMPAT_OIFREQ 1599 if (cmd != ocmd) 1600 ifreqn2o(oifr, ifr); 1601 #endif 1602 1603 return error; 1604 } 1605 1606 /* 1607 * Return interface configuration 1608 * of system. List may be used 1609 * in later ioctl's (above) to get 1610 * other information. 1611 */ 1612 /*ARGSUSED*/ 1613 int 1614 ifconf(u_long cmd, void *data) 1615 { 1616 struct ifconf *ifc = (struct ifconf *)data; 1617 struct ifnet *ifp; 1618 struct ifaddr *ifa; 1619 struct ifreq ifr, *ifrp; 1620 int space, error = 0; 1621 const int sz = offsetof(struct ifreq, ifr_ifru) + 1622 sizeof(struct sockaddr); 1623 1624 if ((ifrp = ifc->ifc_req) == NULL) 1625 space = 0; 1626 else 1627 space = ifc->ifc_len; 1628 IFNET_FOREACH(ifp) { 1629 (void)strncpy(ifr.ifr_name, ifp->if_xname, 1630 sizeof(ifr.ifr_name)); 1631 if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0') 1632 return ENAMETOOLONG; 1633 if (TAILQ_EMPTY(&ifp->if_addrlist)) { 1634 memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr)); 1635 if (space >= sz) { 1636 error = copyout(&ifr, ifrp, sz); 1637 if (error != 0) 1638 return (error); 1639 ifrp++; 1640 } 1641 space -= sizeof(struct ifreq); 1642 continue; 1643 } 1644 1645 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 1646 struct sockaddr *sa = ifa->ifa_addr; 1647 if (sa->sa_len <= sizeof(*sa)) { 1648 ifr.ifr_addr = *sa; 1649 if (space >= sz) { 1650 error = copyout(&ifr, ifrp, sz); 1651 ifrp++; 1652 } 1653 space -= sizeof(struct ifreq); 1654 } else { 1655 space -= sa->sa_len - sizeof(*sa) + sz; 1656 if (space < 0) 1657 continue; 1658 error = copyout(&ifr, ifrp, 1659 sizeof(ifr.ifr_name)); 1660 if (error == 0) 1661 error = copyout(sa, 1662 &ifrp->ifr_addr, sa->sa_len); 1663 ifrp = (struct ifreq *) 1664 (sa->sa_len + (char *)&ifrp->ifr_addr); 1665 } 1666 if (error != 0) 1667 return (error); 1668 } 1669 } 1670 if (ifrp != NULL) 1671 ifc->ifc_len -= space; 1672 else 1673 ifc->ifc_len = -space; 1674 return (0); 1675 } 1676 1677 /* 1678 * Queue message on interface, and start output if interface 1679 * not yet active. 1680 */ 1681 int 1682 ifq_enqueue(struct ifnet *ifp, struct mbuf *m 1683 ALTQ_COMMA ALTQ_DECL(struct altq_pktattr *pktattr)) 1684 { 1685 int len = m->m_pkthdr.len; 1686 int mflags = m->m_flags; 1687 int s = splnet(); 1688 int error; 1689 1690 IFQ_ENQUEUE(&ifp->if_snd, m, pktattr, error); 1691 if (error != 0) 1692 goto out; 1693 ifp->if_obytes += len; 1694 if (mflags & M_MCAST) 1695 ifp->if_omcasts++; 1696 if ((ifp->if_flags & IFF_OACTIVE) == 0) 1697 (*ifp->if_start)(ifp); 1698 out: 1699 splx(s); 1700 return error; 1701 } 1702 1703 /* 1704 * Queue message on interface, possibly using a second fast queue 1705 */ 1706 int 1707 ifq_enqueue2(struct ifnet *ifp, struct ifqueue *ifq, struct mbuf *m 1708 ALTQ_COMMA ALTQ_DECL(struct altq_pktattr *pktattr)) 1709 { 1710 int error = 0; 1711 1712 if (ifq != NULL 1713 #ifdef ALTQ 1714 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 1715 #endif 1716 ) { 1717 if (IF_QFULL(ifq)) { 1718 IF_DROP(&ifp->if_snd); 1719 m_freem(m); 1720 if (error == 0) 1721 error = ENOBUFS; 1722 } else 1723 IF_ENQUEUE(ifq, m); 1724 } else 1725 IFQ_ENQUEUE(&ifp->if_snd, m, pktattr, error); 1726 if (error != 0) { 1727 ++ifp->if_oerrors; 1728 return error; 1729 } 1730 return 0; 1731 } 1732 1733 1734 #if defined(INET) || defined(INET6) 1735 static void 1736 sysctl_net_ifq_setup(struct sysctllog **clog, 1737 int pf, const char *pfname, 1738 int ipn, const char *ipname, 1739 int qid, struct ifqueue *ifq) 1740 { 1741 1742 sysctl_createv(clog, 0, NULL, NULL, 1743 CTLFLAG_PERMANENT, 1744 CTLTYPE_NODE, "net", NULL, 1745 NULL, 0, NULL, 0, 1746 CTL_NET, CTL_EOL); 1747 sysctl_createv(clog, 0, NULL, NULL, 1748 CTLFLAG_PERMANENT, 1749 CTLTYPE_NODE, pfname, NULL, 1750 NULL, 0, NULL, 0, 1751 CTL_NET, pf, CTL_EOL); 1752 sysctl_createv(clog, 0, NULL, NULL, 1753 CTLFLAG_PERMANENT, 1754 CTLTYPE_NODE, ipname, NULL, 1755 NULL, 0, NULL, 0, 1756 CTL_NET, pf, ipn, CTL_EOL); 1757 sysctl_createv(clog, 0, NULL, NULL, 1758 CTLFLAG_PERMANENT, 1759 CTLTYPE_NODE, "ifq", 1760 SYSCTL_DESCR("Protocol input queue controls"), 1761 NULL, 0, NULL, 0, 1762 CTL_NET, pf, ipn, qid, CTL_EOL); 1763 1764 sysctl_createv(clog, 0, NULL, NULL, 1765 CTLFLAG_PERMANENT, 1766 CTLTYPE_INT, "len", 1767 SYSCTL_DESCR("Current input queue length"), 1768 NULL, 0, &ifq->ifq_len, 0, 1769 CTL_NET, pf, ipn, qid, IFQCTL_LEN, CTL_EOL); 1770 sysctl_createv(clog, 0, NULL, NULL, 1771 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1772 CTLTYPE_INT, "maxlen", 1773 SYSCTL_DESCR("Maximum allowed input queue length"), 1774 NULL, 0, &ifq->ifq_maxlen, 0, 1775 CTL_NET, pf, ipn, qid, IFQCTL_MAXLEN, CTL_EOL); 1776 #ifdef notyet 1777 sysctl_createv(clog, 0, NULL, NULL, 1778 CTLFLAG_PERMANENT, 1779 CTLTYPE_INT, "peak", 1780 SYSCTL_DESCR("Highest input queue length"), 1781 NULL, 0, &ifq->ifq_peak, 0, 1782 CTL_NET, pf, ipn, qid, IFQCTL_PEAK, CTL_EOL); 1783 #endif 1784 sysctl_createv(clog, 0, NULL, NULL, 1785 CTLFLAG_PERMANENT, 1786 CTLTYPE_INT, "drops", 1787 SYSCTL_DESCR("Packets dropped due to full input queue"), 1788 NULL, 0, &ifq->ifq_drops, 0, 1789 CTL_NET, pf, ipn, qid, IFQCTL_DROPS, CTL_EOL); 1790 } 1791 1792 #ifdef INET 1793 SYSCTL_SETUP(sysctl_net_inet_ip_ifq_setup, 1794 "sysctl net.inet.ip.ifq subtree setup") 1795 { 1796 extern struct ifqueue ipintrq; 1797 1798 sysctl_net_ifq_setup(clog, PF_INET, "inet", IPPROTO_IP, "ip", 1799 IPCTL_IFQ, &ipintrq); 1800 } 1801 #endif /* INET */ 1802 1803 #ifdef INET6 1804 SYSCTL_SETUP(sysctl_net_inet6_ip6_ifq_setup, 1805 "sysctl net.inet6.ip6.ifq subtree setup") 1806 { 1807 extern struct ifqueue ip6intrq; 1808 1809 sysctl_net_ifq_setup(clog, PF_INET6, "inet6", IPPROTO_IPV6, "ip6", 1810 IPV6CTL_IFQ, &ip6intrq); 1811 } 1812 #endif /* INET6 */ 1813 #endif /* INET || INET6 */ 1814
Indexes created Tue Sep 23 07:09:52 GMT 2025