if.c revision 1.142
1 /* $NetBSD: if.c,v 1.142 2004/05/25 04:33:59 atatat 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 Studnemund 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 1.142 2004/05/25 04:33:59 atatat Exp $"); 101 102 #include "opt_inet.h" 103 104 #include "opt_compat_linux.h" 105 #include "opt_compat_svr4.h" 106 #include "opt_compat_ultrix.h" 107 #include "opt_compat_43.h" 108 #include "opt_atalk.h" 109 #include "opt_ccitt.h" 110 #include "opt_natm.h" 111 #include "opt_pfil_hooks.h" 112 113 #include <sys/param.h> 114 #include <sys/mbuf.h> 115 #include <sys/systm.h> 116 #include <sys/callout.h> 117 #include <sys/proc.h> 118 #include <sys/socket.h> 119 #include <sys/socketvar.h> 120 #include <sys/domain.h> 121 #include <sys/protosw.h> 122 #include <sys/kernel.h> 123 #include <sys/ioctl.h> 124 #include <sys/sysctl.h> 125 126 #include <net/if.h> 127 #include <net/if_dl.h> 128 #include <net/if_ether.h> 129 #include <net/if_media.h> 130 #include <net80211/ieee80211.h> 131 #include <net80211/ieee80211_ioctl.h> 132 #include <net/if_types.h> 133 #include <net/radix.h> 134 #include <net/route.h> 135 #include <net/netisr.h> 136 #ifdef NETATALK 137 #include <netatalk/at_extern.h> 138 #include <netatalk/at.h> 139 #endif 140 141 #ifdef INET6 142 #include <netinet/in.h> 143 #include <netinet6/in6_var.h> 144 #include <netinet6/nd6.h> 145 #endif 146 147 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 148 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 149 150 int ifqmaxlen = IFQ_MAXLEN; 151 struct callout if_slowtimo_ch; 152 153 int netisr; /* scheduling bits for network */ 154 155 int if_rt_walktree __P((struct radix_node *, void *)); 156 157 struct if_clone *if_clone_lookup __P((const char *, int *)); 158 int if_clone_list __P((struct if_clonereq *)); 159 160 LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners); 161 int if_cloners_count; 162 163 #if defined(INET) || defined(INET6) || defined(NETATALK) || defined(NS) || \ 164 defined(ISO) || defined(CCITT) || defined(NATM) 165 static void if_detach_queues __P((struct ifnet *, struct ifqueue *)); 166 #endif 167 168 /* 169 * Network interface utility routines. 170 * 171 * Routines with ifa_ifwith* names take sockaddr *'s as 172 * parameters. 173 */ 174 void 175 ifinit() 176 { 177 178 callout_init(&if_slowtimo_ch); 179 if_slowtimo(NULL); 180 } 181 182 /* 183 * Null routines used while an interface is going away. These routines 184 * just return an error. 185 */ 186 187 int 188 if_nulloutput(ifp, m, so, rt) 189 struct ifnet *ifp; 190 struct mbuf *m; 191 struct sockaddr *so; 192 struct rtentry *rt; 193 { 194 195 return (ENXIO); 196 } 197 198 void 199 if_nullinput(ifp, m) 200 struct ifnet *ifp; 201 struct mbuf *m; 202 { 203 204 /* Nothing. */ 205 } 206 207 void 208 if_nullstart(ifp) 209 struct ifnet *ifp; 210 { 211 212 /* Nothing. */ 213 } 214 215 int 216 if_nullioctl(ifp, cmd, data) 217 struct ifnet *ifp; 218 u_long cmd; 219 caddr_t data; 220 { 221 222 return (ENXIO); 223 } 224 225 int 226 if_nullinit(ifp) 227 struct ifnet *ifp; 228 { 229 230 return (ENXIO); 231 } 232 233 void 234 if_nullstop(ifp, disable) 235 struct ifnet *ifp; 236 int disable; 237 { 238 239 /* Nothing. */ 240 } 241 242 void 243 if_nullwatchdog(ifp) 244 struct ifnet *ifp; 245 { 246 247 /* Nothing. */ 248 } 249 250 void 251 if_nulldrain(ifp) 252 struct ifnet *ifp; 253 { 254 255 /* Nothing. */ 256 } 257 258 static u_int if_index = 1; 259 struct ifnet_head ifnet; 260 size_t if_indexlim = 0; 261 struct ifaddr **ifnet_addrs = NULL; 262 struct ifnet **ifindex2ifnet = NULL; 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((caddr_t)ifa, 0, ifasize); 296 sdl = (struct sockaddr_dl *)(ifa + 1); 297 sdl->sdl_len = socksize; 298 sdl->sdl_family = AF_LINK; 299 bcopy(ifp->if_xname, sdl->sdl_data, 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 + (caddr_t)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(ifp) 356 struct ifnet *ifp; 357 { 358 int indexlim = 0; 359 360 if (if_indexlim == 0) { 361 TAILQ_INIT(&ifnet); 362 if_indexlim = 8; 363 } 364 TAILQ_INIT(&ifp->if_addrlist); 365 TAILQ_INSERT_TAIL(&ifnet, ifp, if_list); 366 ifp->if_index = if_index; 367 if (ifindex2ifnet == 0) 368 if_index++; 369 else 370 while (ifp->if_index < if_indexlim && 371 ifindex2ifnet[ifp->if_index] != NULL) { 372 ++if_index; 373 if (if_index == 0) 374 if_index = 1; 375 /* 376 * If we hit USHRT_MAX, we skip back to 0 since 377 * there are a number of places where the value 378 * of if_index or if_index itself is compared 379 * to or stored in an unsigned short. By 380 * jumping back, we won't botch those assignments 381 * or comparisons. 382 */ 383 else if (if_index == USHRT_MAX) { 384 /* 385 * However, if we have to jump back to 386 * zero *twice* without finding an empty 387 * slot in ifindex2ifnet[], then there 388 * there are too many (>65535) interfaces. 389 */ 390 if (indexlim++) 391 panic("too many interfaces"); 392 else 393 if_index = 1; 394 } 395 ifp->if_index = if_index; 396 } 397 398 /* 399 * We have some arrays that should be indexed by if_index. 400 * since if_index will grow dynamically, they should grow too. 401 * struct ifadd **ifnet_addrs 402 * struct ifnet **ifindex2ifnet 403 */ 404 if (ifnet_addrs == 0 || ifindex2ifnet == 0 || 405 ifp->if_index >= if_indexlim) { 406 size_t m, n, oldlim; 407 caddr_t q; 408 409 oldlim = if_indexlim; 410 while (ifp->if_index >= if_indexlim) 411 if_indexlim <<= 1; 412 413 /* grow ifnet_addrs */ 414 m = oldlim * sizeof(struct ifaddr *); 415 n = if_indexlim * sizeof(struct ifaddr *); 416 q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK); 417 memset(q, 0, n); 418 if (ifnet_addrs) { 419 bcopy((caddr_t)ifnet_addrs, q, m); 420 free((caddr_t)ifnet_addrs, M_IFADDR); 421 } 422 ifnet_addrs = (struct ifaddr **)q; 423 424 /* grow ifindex2ifnet */ 425 m = oldlim * sizeof(struct ifnet *); 426 n = if_indexlim * sizeof(struct ifnet *); 427 q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK); 428 memset(q, 0, n); 429 if (ifindex2ifnet) { 430 bcopy((caddr_t)ifindex2ifnet, q, m); 431 free((caddr_t)ifindex2ifnet, M_IFADDR); 432 } 433 ifindex2ifnet = (struct ifnet **)q; 434 } 435 436 ifindex2ifnet[ifp->if_index] = ifp; 437 438 /* 439 * Link level name is allocated later by a separate call to 440 * if_alloc_sadl(). 441 */ 442 443 if (ifp->if_snd.ifq_maxlen == 0) 444 ifp->if_snd.ifq_maxlen = ifqmaxlen; 445 ifp->if_broadcastaddr = 0; /* reliably crash if used uninitialized */ 446 447 ifp->if_link_state = LINK_STATE_UNKNOWN; 448 449 ifp->if_capenable = 0; 450 ifp->if_csum_flags_tx = 0; 451 ifp->if_csum_flags_rx = 0; 452 453 #ifdef ALTQ 454 ifp->if_snd.altq_type = 0; 455 ifp->if_snd.altq_disc = NULL; 456 ifp->if_snd.altq_flags &= ALTQF_CANTCHANGE; 457 ifp->if_snd.altq_tbr = NULL; 458 ifp->if_snd.altq_ifp = ifp; 459 #endif 460 461 #ifdef PFIL_HOOKS 462 ifp->if_pfil.ph_type = PFIL_TYPE_IFNET; 463 ifp->if_pfil.ph_ifnet = ifp; 464 if (pfil_head_register(&ifp->if_pfil) != 0) 465 printf("%s: WARNING: unable to register pfil hook\n", 466 ifp->if_xname); 467 #endif 468 469 if (domains) 470 if_attachdomain1(ifp); 471 472 /* Announce the interface. */ 473 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 474 } 475 476 void 477 if_attachdomain() 478 { 479 struct ifnet *ifp; 480 int s; 481 482 s = splnet(); 483 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) 484 if_attachdomain1(ifp); 485 splx(s); 486 } 487 488 void 489 if_attachdomain1(ifp) 490 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 for (dp = domains; dp; dp = dp->dom_next) { 500 if (dp->dom_ifattach) 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(ifp) 514 struct ifnet *ifp; 515 { 516 int s; 517 518 s = splnet(); 519 520 ifp->if_output = if_nulloutput; 521 ifp->if_input = if_nullinput; 522 ifp->if_start = if_nullstart; 523 ifp->if_ioctl = if_nullioctl; 524 ifp->if_init = if_nullinit; 525 ifp->if_stop = if_nullstop; 526 ifp->if_watchdog = if_nullwatchdog; 527 ifp->if_drain = if_nulldrain; 528 529 /* No more packets may be enqueued. */ 530 ifp->if_snd.ifq_maxlen = 0; 531 532 splx(s); 533 } 534 535 /* 536 * Detach an interface from the list of "active" interfaces, 537 * freeing any resources as we go along. 538 * 539 * NOTE: This routine must be called with a valid thread context, 540 * as it may block. 541 */ 542 void 543 if_detach(ifp) 544 struct ifnet *ifp; 545 { 546 struct socket so; 547 struct ifaddr *ifa, **ifap; 548 #ifdef IFAREF_DEBUG 549 struct ifaddr *last_ifa = NULL; 550 #endif 551 struct domain *dp; 552 const struct protosw *pr; 553 struct radix_node_head *rnh; 554 int s, i, family, purged; 555 556 /* 557 * XXX It's kind of lame that we have to have the 558 * XXX socket structure... 559 */ 560 memset(&so, 0, sizeof(so)); 561 562 s = splnet(); 563 564 /* 565 * Do an if_down() to give protocols a chance to do something. 566 */ 567 if_down(ifp); 568 569 #ifdef ALTQ 570 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 571 altq_disable(&ifp->if_snd); 572 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 573 altq_detach(&ifp->if_snd); 574 #endif 575 576 #ifdef PFIL_HOOKS 577 (void) pfil_head_unregister(&ifp->if_pfil); 578 #endif 579 580 /* 581 * Rip all the addresses off the interface. This should make 582 * all of the routes go away. 583 */ 584 ifap = &TAILQ_FIRST(&ifp->if_addrlist); /* XXX abstraction violation */ 585 while ((ifa = *ifap)) { 586 family = ifa->ifa_addr->sa_family; 587 #ifdef IFAREF_DEBUG 588 printf("if_detach: ifaddr %p, family %d, refcnt %d\n", 589 ifa, family, ifa->ifa_refcnt); 590 if (last_ifa != NULL && ifa == last_ifa) 591 panic("if_detach: loop detected"); 592 last_ifa = ifa; 593 #endif 594 if (family == AF_LINK) { 595 ifap = &TAILQ_NEXT(ifa, ifa_list); 596 continue; 597 } 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 purged = 0; 605 for (pr = dp->dom_protosw; 606 pr < dp->dom_protoswNPROTOSW; pr++) { 607 so.so_proto = pr; 608 if (pr->pr_usrreq != NULL) { 609 (void) (*pr->pr_usrreq)(&so, 610 PRU_PURGEIF, NULL, NULL, 611 (struct mbuf *) ifp, curproc); 612 purged = 1; 613 } 614 } 615 if (purged == 0) { 616 /* 617 * XXX What's really the best thing to do 618 * XXX here? --thorpej (at) NetBSD.org 619 */ 620 printf("if_detach: WARNING: AF %d not purged\n", 621 family); 622 TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list); 623 } 624 } 625 626 if_free_sadl(ifp); 627 628 /* Walk the routing table looking for straglers. */ 629 for (i = 0; i <= AF_MAX; i++) { 630 if ((rnh = rt_tables[i]) != NULL) 631 (void) (*rnh->rnh_walktree)(rnh, if_rt_walktree, ifp); 632 } 633 634 for (dp = domains; dp; dp = dp->dom_next) { 635 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 636 (*dp->dom_ifdetach)(ifp, 637 ifp->if_afdata[dp->dom_family]); 638 } 639 640 /* Announce that the interface is gone. */ 641 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 642 643 ifindex2ifnet[ifp->if_index] = NULL; 644 645 TAILQ_REMOVE(&ifnet, ifp, if_list); 646 647 /* 648 * remove packets came from ifp, from software interrupt queues. 649 * net/netisr_dispatch.h is not usable, as some of them use 650 * strange queue names. 651 */ 652 #define IF_DETACH_QUEUES(x) \ 653 do { \ 654 extern struct ifqueue x; \ 655 if_detach_queues(ifp, & x); \ 656 } while (/*CONSTCOND*/ 0) 657 #ifdef INET 658 #if NARP > 0 659 IF_DETACH_QUEUES(arpintrq); 660 #endif 661 IF_DETACH_QUEUES(ipintrq); 662 #endif 663 #ifdef INET6 664 IF_DETACH_QUEUES(ip6intrq); 665 #endif 666 #ifdef NETATALK 667 IF_DETACH_QUEUES(atintrq1); 668 IF_DETACH_QUEUES(atintrq2); 669 #endif 670 #ifdef NS 671 IF_DETACH_QUEUES(nsintrq); 672 #endif 673 #ifdef ISO 674 IF_DETACH_QUEUES(clnlintrq); 675 #endif 676 #ifdef CCITT 677 IF_DETACH_QUEUES(llcintrq); 678 IF_DETACH_QUEUES(hdintrq); 679 #endif 680 #ifdef NATM 681 IF_DETACH_QUEUES(natmintrq); 682 #endif 683 #ifdef DECNET 684 IF_DETACH_QUEUES(decnetintrq); 685 #endif 686 #undef IF_DETACH_QUEUES 687 688 splx(s); 689 } 690 691 #if defined(INET) || defined(INET6) || defined(NETATALK) || defined(NS) || \ 692 defined(ISO) || defined(CCITT) || defined(NATM) || defined(DECNET) 693 static void 694 if_detach_queues(ifp, q) 695 struct ifnet *ifp; 696 struct ifqueue *q; 697 { 698 struct mbuf *m, *prev, *next; 699 700 prev = NULL; 701 for (m = q->ifq_head; m; m = next) { 702 next = m->m_nextpkt; 703 #ifdef DIAGNOSTIC 704 if ((m->m_flags & M_PKTHDR) == 0) { 705 prev = m; 706 continue; 707 } 708 #endif 709 if (m->m_pkthdr.rcvif != ifp) { 710 prev = m; 711 continue; 712 } 713 714 if (prev) 715 prev->m_nextpkt = m->m_nextpkt; 716 else 717 q->ifq_head = m->m_nextpkt; 718 if (q->ifq_tail == m) 719 q->ifq_tail = prev; 720 q->ifq_len--; 721 722 m->m_nextpkt = NULL; 723 m_freem(m); 724 IF_DROP(q); 725 } 726 } 727 #endif /* defined(INET) || ... */ 728 729 /* 730 * Callback for a radix tree walk to delete all references to an 731 * ifnet. 732 */ 733 int 734 if_rt_walktree(rn, v) 735 struct radix_node *rn; 736 void *v; 737 { 738 struct ifnet *ifp = (struct ifnet *)v; 739 struct rtentry *rt = (struct rtentry *)rn; 740 int error; 741 742 if (rt->rt_ifp == ifp) { 743 /* Delete the entry. */ 744 error = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, 745 rt_mask(rt), rt->rt_flags, NULL); 746 if (error) 747 printf("%s: warning: unable to delete rtentry @ %p, " 748 "error = %d\n", ifp->if_xname, rt, error); 749 } 750 return (0); 751 } 752 753 /* 754 * Create a clone network interface. 755 */ 756 int 757 if_clone_create(name) 758 const char *name; 759 { 760 struct if_clone *ifc; 761 int unit; 762 763 ifc = if_clone_lookup(name, &unit); 764 if (ifc == NULL) 765 return (EINVAL); 766 767 if (ifunit(name) != NULL) 768 return (EEXIST); 769 770 return ((*ifc->ifc_create)(ifc, unit)); 771 } 772 773 /* 774 * Destroy a clone network interface. 775 */ 776 int 777 if_clone_destroy(name) 778 const char *name; 779 { 780 struct if_clone *ifc; 781 struct ifnet *ifp; 782 783 ifc = if_clone_lookup(name, NULL); 784 if (ifc == NULL) 785 return (EINVAL); 786 787 ifp = ifunit(name); 788 if (ifp == NULL) 789 return (ENXIO); 790 791 if (ifc->ifc_destroy == NULL) 792 return (EOPNOTSUPP); 793 794 (*ifc->ifc_destroy)(ifp); 795 return (0); 796 } 797 798 /* 799 * Look up a network interface cloner. 800 */ 801 struct if_clone * 802 if_clone_lookup(name, unitp) 803 const char *name; 804 int *unitp; 805 { 806 struct if_clone *ifc; 807 const char *cp; 808 int unit; 809 810 /* separate interface name from unit */ 811 for (cp = name; 812 cp - name < IFNAMSIZ && *cp && (*cp < '0' || *cp > '9'); 813 cp++) 814 continue; 815 816 if (cp == name || cp - name == IFNAMSIZ || !*cp) 817 return (NULL); /* No name or unit number */ 818 819 LIST_FOREACH(ifc, &if_cloners, ifc_list) { 820 if (strlen(ifc->ifc_name) == cp - name && 821 !strncmp(name, ifc->ifc_name, cp - name)) 822 break; 823 } 824 825 if (ifc == NULL) 826 return (NULL); 827 828 unit = 0; 829 while (cp - name < IFNAMSIZ && *cp) { 830 if (*cp < '0' || *cp > '9' || unit > INT_MAX / 10) { 831 /* Bogus unit number. */ 832 return (NULL); 833 } 834 unit = (unit * 10) + (*cp++ - '0'); 835 } 836 837 if (unitp != NULL) 838 *unitp = unit; 839 return (ifc); 840 } 841 842 /* 843 * Register a network interface cloner. 844 */ 845 void 846 if_clone_attach(ifc) 847 struct if_clone *ifc; 848 { 849 850 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list); 851 if_cloners_count++; 852 } 853 854 /* 855 * Unregister a network interface cloner. 856 */ 857 void 858 if_clone_detach(ifc) 859 struct if_clone *ifc; 860 { 861 862 LIST_REMOVE(ifc, ifc_list); 863 if_cloners_count--; 864 } 865 866 /* 867 * Provide list of interface cloners to userspace. 868 */ 869 int 870 if_clone_list(ifcr) 871 struct if_clonereq *ifcr; 872 { 873 char outbuf[IFNAMSIZ], *dst; 874 struct if_clone *ifc; 875 int count, error = 0; 876 877 ifcr->ifcr_total = if_cloners_count; 878 if ((dst = ifcr->ifcr_buffer) == NULL) { 879 /* Just asking how many there are. */ 880 return (0); 881 } 882 883 if (ifcr->ifcr_count < 0) 884 return (EINVAL); 885 886 count = (if_cloners_count < ifcr->ifcr_count) ? 887 if_cloners_count : ifcr->ifcr_count; 888 889 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0; 890 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) { 891 strncpy(outbuf, ifc->ifc_name, IFNAMSIZ); 892 outbuf[IFNAMSIZ - 1] = '\0'; /* sanity */ 893 error = copyout(outbuf, dst, IFNAMSIZ); 894 if (error) 895 break; 896 } 897 898 return (error); 899 } 900 901 /* 902 * Locate an interface based on a complete address. 903 */ 904 /*ARGSUSED*/ 905 struct ifaddr * 906 ifa_ifwithaddr(addr) 907 const struct sockaddr *addr; 908 { 909 struct ifnet *ifp; 910 struct ifaddr *ifa; 911 912 #define equal(a1, a2) \ 913 (bcmp((caddr_t)(a1), (caddr_t)(a2), ((struct sockaddr *)(a1))->sa_len) == 0) 914 915 for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL; 916 ifp = TAILQ_NEXT(ifp, if_list)) { 917 if (ifp->if_output == if_nulloutput) 918 continue; 919 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; 920 ifa = TAILQ_NEXT(ifa, 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(addr) 942 const struct sockaddr *addr; 943 { 944 struct ifnet *ifp; 945 struct ifaddr *ifa; 946 947 for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL; 948 ifp = TAILQ_NEXT(ifp, if_list)) { 949 if (ifp->if_output == if_nulloutput) 950 continue; 951 if (ifp->if_flags & IFF_POINTOPOINT) { 952 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; 953 ifa = TAILQ_NEXT(ifa, ifa_list)) { 954 if (ifa->ifa_addr->sa_family != 955 addr->sa_family || 956 ifa->ifa_dstaddr == NULL) 957 continue; 958 if (equal(addr, ifa->ifa_dstaddr)) 959 return (ifa); 960 } 961 } 962 } 963 return (NULL); 964 } 965 966 /* 967 * Find an interface on a specific network. If many, choice 968 * is most specific found. 969 */ 970 struct ifaddr * 971 ifa_ifwithnet(addr) 972 const struct sockaddr *addr; 973 { 974 struct ifnet *ifp; 975 struct ifaddr *ifa; 976 const struct sockaddr_dl *sdl; 977 struct ifaddr *ifa_maybe = 0; 978 u_int af = addr->sa_family; 979 char *addr_data = addr->sa_data, *cplim; 980 981 if (af == AF_LINK) { 982 sdl = (struct sockaddr_dl *)addr; 983 if (sdl->sdl_index && sdl->sdl_index < if_indexlim && 984 ifindex2ifnet[sdl->sdl_index] && 985 ifindex2ifnet[sdl->sdl_index]->if_output != if_nulloutput) 986 return (ifnet_addrs[sdl->sdl_index]); 987 } 988 #ifdef NETATALK 989 if (af == AF_APPLETALK) { 990 const struct sockaddr_at *sat, *sat2; 991 sat = (struct sockaddr_at *)addr; 992 for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL; 993 ifp = TAILQ_NEXT(ifp, if_list)) { 994 if (ifp->if_output == if_nulloutput) 995 continue; 996 ifa = at_ifawithnet((struct sockaddr_at *)addr, ifp); 997 if (ifa == NULL) 998 continue; 999 sat2 = (struct sockaddr_at *)ifa->ifa_addr; 1000 if (sat2->sat_addr.s_net == sat->sat_addr.s_net) 1001 return (ifa); /* exact match */ 1002 if (ifa_maybe == NULL) { 1003 /* else keep the if with the right range */ 1004 ifa_maybe = ifa; 1005 } 1006 } 1007 return (ifa_maybe); 1008 } 1009 #endif 1010 for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL; 1011 ifp = TAILQ_NEXT(ifp, if_list)) { 1012 if (ifp->if_output == if_nulloutput) 1013 continue; 1014 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; 1015 ifa = TAILQ_NEXT(ifa, ifa_list)) { 1016 char *cp, *cp2, *cp3; 1017 1018 if (ifa->ifa_addr->sa_family != af || 1019 ifa->ifa_netmask == 0) 1020 next: continue; 1021 cp = addr_data; 1022 cp2 = ifa->ifa_addr->sa_data; 1023 cp3 = ifa->ifa_netmask->sa_data; 1024 cplim = (char *)ifa->ifa_netmask + 1025 ifa->ifa_netmask->sa_len; 1026 while (cp3 < cplim) { 1027 if ((*cp++ ^ *cp2++) & *cp3++) { 1028 /* want to continue for() loop */ 1029 goto next; 1030 } 1031 } 1032 if (ifa_maybe == 0 || 1033 rn_refines((caddr_t)ifa->ifa_netmask, 1034 (caddr_t)ifa_maybe->ifa_netmask)) 1035 ifa_maybe = ifa; 1036 } 1037 } 1038 return (ifa_maybe); 1039 } 1040 1041 /* 1042 * Find the interface of the addresss. 1043 */ 1044 struct ifaddr * 1045 ifa_ifwithladdr(addr) 1046 const struct sockaddr *addr; 1047 { 1048 struct ifaddr *ia; 1049 1050 if ((ia = ifa_ifwithaddr(addr)) || (ia = ifa_ifwithdstaddr(addr)) || 1051 (ia = ifa_ifwithnet(addr))) 1052 return (ia); 1053 return (NULL); 1054 } 1055 1056 /* 1057 * Find an interface using a specific address family 1058 */ 1059 struct ifaddr * 1060 ifa_ifwithaf(af) 1061 int af; 1062 { 1063 struct ifnet *ifp; 1064 struct ifaddr *ifa; 1065 1066 for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL; 1067 ifp = TAILQ_NEXT(ifp, if_list)) { 1068 if (ifp->if_output == if_nulloutput) 1069 continue; 1070 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; 1071 ifa = TAILQ_NEXT(ifa, ifa_list)) { 1072 if (ifa->ifa_addr->sa_family == af) 1073 return (ifa); 1074 } 1075 } 1076 return (NULL); 1077 } 1078 1079 /* 1080 * Find an interface address specific to an interface best matching 1081 * a given address. 1082 */ 1083 struct ifaddr * 1084 ifaof_ifpforaddr(addr, ifp) 1085 const struct sockaddr *addr; 1086 struct ifnet *ifp; 1087 { 1088 struct ifaddr *ifa; 1089 const char *cp, *cp2, *cp3; 1090 const char *cplim; 1091 struct ifaddr *ifa_maybe = 0; 1092 u_int af = addr->sa_family; 1093 1094 if (ifp->if_output == if_nulloutput) 1095 return (NULL); 1096 1097 if (af >= AF_MAX) 1098 return (NULL); 1099 1100 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; 1101 ifa = TAILQ_NEXT(ifa, ifa_list)) { 1102 if (ifa->ifa_addr->sa_family != af) 1103 continue; 1104 ifa_maybe = ifa; 1105 if (ifa->ifa_netmask == 0) { 1106 if (equal(addr, ifa->ifa_addr) || 1107 (ifa->ifa_dstaddr && 1108 equal(addr, ifa->ifa_dstaddr))) 1109 return (ifa); 1110 continue; 1111 } 1112 cp = addr->sa_data; 1113 cp2 = ifa->ifa_addr->sa_data; 1114 cp3 = ifa->ifa_netmask->sa_data; 1115 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1116 for (; cp3 < cplim; cp3++) { 1117 if ((*cp++ ^ *cp2++) & *cp3) 1118 break; 1119 } 1120 if (cp3 == cplim) 1121 return (ifa); 1122 } 1123 return (ifa_maybe); 1124 } 1125 1126 /* 1127 * Default action when installing a route with a Link Level gateway. 1128 * Lookup an appropriate real ifa to point to. 1129 * This should be moved to /sys/net/link.c eventually. 1130 */ 1131 void 1132 link_rtrequest(cmd, rt, info) 1133 int cmd; 1134 struct rtentry *rt; 1135 struct rt_addrinfo *info; 1136 { 1137 struct ifaddr *ifa; 1138 struct sockaddr *dst; 1139 struct ifnet *ifp; 1140 1141 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) || 1142 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0)) 1143 return; 1144 if ((ifa = ifaof_ifpforaddr(dst, ifp)) != NULL) { 1145 IFAFREE(rt->rt_ifa); 1146 rt->rt_ifa = ifa; 1147 IFAREF(ifa); 1148 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1149 ifa->ifa_rtrequest(cmd, rt, info); 1150 } 1151 } 1152 1153 /* 1154 * Mark an interface down and notify protocols of 1155 * the transition. 1156 * NOTE: must be called at splsoftnet or equivalent. 1157 */ 1158 void 1159 if_down(ifp) 1160 struct ifnet *ifp; 1161 { 1162 struct ifaddr *ifa; 1163 1164 ifp->if_flags &= ~IFF_UP; 1165 microtime(&ifp->if_lastchange); 1166 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; 1167 ifa = TAILQ_NEXT(ifa, ifa_list)) 1168 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1169 IFQ_PURGE(&ifp->if_snd); 1170 rt_ifmsg(ifp); 1171 } 1172 1173 /* 1174 * Mark an interface up and notify protocols of 1175 * the transition. 1176 * NOTE: must be called at splsoftnet or equivalent. 1177 */ 1178 void 1179 if_up(ifp) 1180 struct ifnet *ifp; 1181 { 1182 #ifdef notyet 1183 struct ifaddr *ifa; 1184 #endif 1185 1186 ifp->if_flags |= IFF_UP; 1187 microtime(&ifp->if_lastchange); 1188 #ifdef notyet 1189 /* this has no effect on IP, and will kill all ISO connections XXX */ 1190 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; 1191 ifa = TAILQ_NEXT(ifa, ifa_list)) 1192 pfctlinput(PRC_IFUP, ifa->ifa_addr); 1193 #endif 1194 rt_ifmsg(ifp); 1195 #ifdef INET6 1196 in6_if_up(ifp); 1197 #endif 1198 } 1199 1200 /* 1201 * Handle interface watchdog timer routines. Called 1202 * from softclock, we decrement timers (if set) and 1203 * call the appropriate interface routine on expiration. 1204 */ 1205 void 1206 if_slowtimo(arg) 1207 void *arg; 1208 { 1209 struct ifnet *ifp; 1210 int s = splnet(); 1211 1212 for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL; 1213 ifp = TAILQ_NEXT(ifp, if_list)) { 1214 if (ifp->if_timer == 0 || --ifp->if_timer) 1215 continue; 1216 if (ifp->if_watchdog) 1217 (*ifp->if_watchdog)(ifp); 1218 } 1219 splx(s); 1220 callout_reset(&if_slowtimo_ch, hz / IFNET_SLOWHZ, 1221 if_slowtimo, NULL); 1222 } 1223 1224 /* 1225 * Set/clear promiscuous mode on interface ifp based on the truth value 1226 * of pswitch. The calls are reference counted so that only the first 1227 * "on" request actually has an effect, as does the final "off" request. 1228 * Results are undefined if the "off" and "on" requests are not matched. 1229 */ 1230 int 1231 ifpromisc(ifp, pswitch) 1232 struct ifnet *ifp; 1233 int pswitch; 1234 { 1235 int pcount, ret; 1236 short flags; 1237 struct ifreq ifr; 1238 1239 pcount = ifp->if_pcount; 1240 flags = ifp->if_flags; 1241 if (pswitch) { 1242 /* 1243 * Allow the device to be "placed" into promiscuous 1244 * mode even if it is not configured up. It will 1245 * consult IFF_PROMISC when it is is brought up. 1246 */ 1247 if (ifp->if_pcount++ != 0) 1248 return (0); 1249 ifp->if_flags |= IFF_PROMISC; 1250 if ((ifp->if_flags & IFF_UP) == 0) 1251 return (0); 1252 } else { 1253 if (--ifp->if_pcount > 0) 1254 return (0); 1255 ifp->if_flags &= ~IFF_PROMISC; 1256 /* 1257 * If the device is not configured up, we should not need to 1258 * turn off promiscuous mode (device should have turned it 1259 * off when interface went down; and will look at IFF_PROMISC 1260 * again next time interface comes up). 1261 */ 1262 if ((ifp->if_flags & IFF_UP) == 0) 1263 return (0); 1264 } 1265 memset(&ifr, 0, sizeof(ifr)); 1266 ifr.ifr_flags = ifp->if_flags; 1267 ret = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t) &ifr); 1268 /* Restore interface state if not successful. */ 1269 if (ret != 0) { 1270 ifp->if_pcount = pcount; 1271 ifp->if_flags = flags; 1272 } 1273 return (ret); 1274 } 1275 1276 /* 1277 * Map interface name to 1278 * interface structure pointer. 1279 */ 1280 struct ifnet * 1281 ifunit(name) 1282 const char *name; 1283 { 1284 struct ifnet *ifp; 1285 const char *cp = name; 1286 u_int unit = 0; 1287 u_int i; 1288 1289 /* 1290 * If the entire name is a number, treat it as an ifindex. 1291 */ 1292 for (i = 0; i < IFNAMSIZ && *cp >= '0' && *cp <= '9'; i++, cp++) { 1293 unit = unit * 10 + (*cp - '0'); 1294 } 1295 1296 /* 1297 * If the number took all of the name, then it's a valid ifindex. 1298 */ 1299 if (i == IFNAMSIZ || (cp != name && *cp == '\0')) { 1300 if (unit >= if_indexlim) 1301 return (NULL); 1302 ifp = ifindex2ifnet[unit]; 1303 if (ifp == NULL || ifp->if_output == if_nulloutput) 1304 return (NULL); 1305 return (ifp); 1306 } 1307 1308 for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL; 1309 ifp = TAILQ_NEXT(ifp, if_list)) { 1310 if (ifp->if_output == if_nulloutput) 1311 continue; 1312 if (strcmp(ifp->if_xname, name) == 0) 1313 return (ifp); 1314 } 1315 return (NULL); 1316 } 1317 1318 /* 1319 * Interface ioctls. 1320 */ 1321 int 1322 ifioctl(so, cmd, data, p) 1323 struct socket *so; 1324 u_long cmd; 1325 caddr_t data; 1326 struct proc *p; 1327 { 1328 struct ifnet *ifp; 1329 struct ifreq *ifr; 1330 struct ifcapreq *ifcr; 1331 struct ifdatareq *ifdr; 1332 int s, error = 0; 1333 short oif_flags; 1334 int prived_error; 1335 1336 if (p) 1337 prived_error = suser(p->p_ucred, &p->p_acflag); 1338 else 1339 prived_error = 0; 1340 1341 switch (cmd) { 1342 1343 case SIOCGIFCONF: 1344 case OSIOCGIFCONF: 1345 return (ifconf(cmd, data)); 1346 } 1347 ifr = (struct ifreq *)data; 1348 ifcr = (struct ifcapreq *)data; 1349 ifdr = (struct ifdatareq *)data; 1350 1351 switch (cmd) { 1352 case SIOCIFCREATE: 1353 case SIOCIFDESTROY: 1354 if (prived_error) 1355 return (prived_error); 1356 return ((cmd == SIOCIFCREATE) ? 1357 if_clone_create(ifr->ifr_name) : 1358 if_clone_destroy(ifr->ifr_name)); 1359 1360 case SIOCIFGCLONERS: 1361 return (if_clone_list((struct if_clonereq *)data)); 1362 } 1363 1364 ifp = ifunit(ifr->ifr_name); 1365 if (ifp == 0) 1366 return (ENXIO); 1367 oif_flags = ifp->if_flags; 1368 switch (cmd) { 1369 1370 case SIOCGIFFLAGS: 1371 ifr->ifr_flags = ifp->if_flags; 1372 break; 1373 1374 case SIOCGIFMETRIC: 1375 ifr->ifr_metric = ifp->if_metric; 1376 break; 1377 1378 case SIOCGIFMTU: 1379 ifr->ifr_mtu = ifp->if_mtu; 1380 break; 1381 1382 case SIOCGIFDLT: 1383 ifr->ifr_dlt = ifp->if_dlt; 1384 break; 1385 1386 case SIOCSIFFLAGS: 1387 if (prived_error != 0) 1388 return (prived_error); 1389 if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) { 1390 s = splnet(); 1391 if_down(ifp); 1392 splx(s); 1393 } 1394 if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) { 1395 s = splnet(); 1396 if_up(ifp); 1397 splx(s); 1398 } 1399 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 1400 (ifr->ifr_flags &~ IFF_CANTCHANGE); 1401 if (ifp->if_ioctl) 1402 (void) (*ifp->if_ioctl)(ifp, cmd, data); 1403 break; 1404 1405 case SIOCGIFCAP: 1406 ifcr->ifcr_capabilities = ifp->if_capabilities; 1407 ifcr->ifcr_capenable = ifp->if_capenable; 1408 break; 1409 1410 case SIOCSIFCAP: 1411 if (prived_error != 0) 1412 return (prived_error); 1413 if ((ifcr->ifcr_capenable & ~ifp->if_capabilities) != 0) 1414 return (EINVAL); 1415 if (ifp->if_ioctl == NULL) 1416 return (EOPNOTSUPP); 1417 1418 /* Must prevent race with packet reception here. */ 1419 s = splnet(); 1420 if (ifcr->ifcr_capenable != ifp->if_capenable) { 1421 struct ifreq ifrq; 1422 1423 ifrq.ifr_flags = ifp->if_flags; 1424 ifp->if_capenable = ifcr->ifcr_capenable; 1425 1426 /* Pre-compute the checksum flags mask. */ 1427 ifp->if_csum_flags_tx = 0; 1428 ifp->if_csum_flags_rx = 0; 1429 if (ifp->if_capenable & IFCAP_CSUM_IPv4) { 1430 ifp->if_csum_flags_tx |= M_CSUM_IPv4; 1431 ifp->if_csum_flags_rx |= M_CSUM_IPv4; 1432 } 1433 1434 if (ifp->if_capenable & IFCAP_CSUM_TCPv4) { 1435 ifp->if_csum_flags_tx |= M_CSUM_TCPv4; 1436 ifp->if_csum_flags_rx |= M_CSUM_TCPv4; 1437 } else if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Rx) 1438 ifp->if_csum_flags_rx |= M_CSUM_TCPv4; 1439 1440 if (ifp->if_capenable & IFCAP_CSUM_UDPv4) { 1441 ifp->if_csum_flags_tx |= M_CSUM_UDPv4; 1442 ifp->if_csum_flags_rx |= M_CSUM_UDPv4; 1443 } else if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Rx) 1444 ifp->if_csum_flags_rx |= M_CSUM_UDPv4; 1445 1446 if (ifp->if_capenable & IFCAP_CSUM_TCPv6) { 1447 ifp->if_csum_flags_tx |= M_CSUM_TCPv6; 1448 ifp->if_csum_flags_rx |= M_CSUM_TCPv6; 1449 } 1450 1451 if (ifp->if_capenable & IFCAP_CSUM_UDPv6) { 1452 ifp->if_csum_flags_tx |= M_CSUM_UDPv6; 1453 ifp->if_csum_flags_rx |= M_CSUM_UDPv6; 1454 } 1455 1456 /* 1457 * Only kick the interface if it's up. If it's 1458 * not up now, it will notice the cap enables 1459 * when it is brought up later. 1460 */ 1461 if (ifp->if_flags & IFF_UP) 1462 (void) (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, 1463 (caddr_t) &ifrq); 1464 } 1465 splx(s); 1466 break; 1467 1468 case SIOCSIFMETRIC: 1469 if (prived_error != 0) 1470 return (prived_error); 1471 ifp->if_metric = ifr->ifr_metric; 1472 break; 1473 1474 case SIOCGIFDATA: 1475 ifdr->ifdr_data = ifp->if_data; 1476 break; 1477 1478 case SIOCZIFDATA: 1479 if (prived_error != 0) 1480 return (prived_error); 1481 ifdr->ifdr_data = ifp->if_data; 1482 /* 1483 * Assumes that the volatile counters that can be 1484 * zero'ed are at the end of if_data. 1485 */ 1486 memset(&ifp->if_data.ifi_ipackets, 0, sizeof(ifp->if_data) - 1487 offsetof(struct if_data, ifi_ipackets)); 1488 break; 1489 1490 case SIOCSIFMTU: 1491 { 1492 u_long oldmtu = ifp->if_mtu; 1493 1494 if (prived_error) 1495 return (prived_error); 1496 if (ifp->if_ioctl == NULL) 1497 return (EOPNOTSUPP); 1498 error = (*ifp->if_ioctl)(ifp, cmd, data); 1499 1500 /* 1501 * If the link MTU changed, do network layer specific procedure. 1502 */ 1503 if (ifp->if_mtu != oldmtu) { 1504 #ifdef INET6 1505 nd6_setmtu(ifp); 1506 #endif 1507 } 1508 break; 1509 } 1510 case SIOCSIFPHYADDR: 1511 case SIOCDIFPHYADDR: 1512 #ifdef INET6 1513 case SIOCSIFPHYADDR_IN6: 1514 #endif 1515 case SIOCSLIFPHYADDR: 1516 case SIOCADDMULTI: 1517 case SIOCDELMULTI: 1518 case SIOCSIFMEDIA: 1519 if (prived_error != 0) 1520 return (prived_error); 1521 /* FALLTHROUGH */ 1522 case SIOCGIFPSRCADDR: 1523 case SIOCGIFPDSTADDR: 1524 case SIOCGLIFPHYADDR: 1525 case SIOCGIFMEDIA: 1526 if (ifp->if_ioctl == 0) 1527 return (EOPNOTSUPP); 1528 error = (*ifp->if_ioctl)(ifp, cmd, data); 1529 break; 1530 1531 case SIOCSDRVSPEC: 1532 case SIOCS80211NWID: 1533 case SIOCS80211NWKEY: 1534 case SIOCS80211POWER: 1535 case SIOCS80211BSSID: 1536 case SIOCS80211CHANNEL: 1537 /* XXX: need to pass proc pointer through to driver... */ 1538 if (prived_error != 0) 1539 return (prived_error); 1540 /* FALLTHROUGH */ 1541 default: 1542 if (so->so_proto == 0) 1543 return (EOPNOTSUPP); 1544 #if !defined(COMPAT_43) && !defined(COMPAT_LINUX) && !defined(COMPAT_SVR4) && !defined(COMPAT_ULTRIX) && !defined(LKM) 1545 error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 1546 (struct mbuf *)cmd, (struct mbuf *)data, 1547 (struct mbuf *)ifp, p)); 1548 #else 1549 { 1550 int ocmd = cmd; 1551 1552 switch (cmd) { 1553 1554 case SIOCSIFADDR: 1555 case SIOCSIFDSTADDR: 1556 case SIOCSIFBRDADDR: 1557 case SIOCSIFNETMASK: 1558 #if BYTE_ORDER != BIG_ENDIAN 1559 if (ifr->ifr_addr.sa_family == 0 && 1560 ifr->ifr_addr.sa_len < 16) { 1561 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len; 1562 ifr->ifr_addr.sa_len = 16; 1563 } 1564 #else 1565 if (ifr->ifr_addr.sa_len == 0) 1566 ifr->ifr_addr.sa_len = 16; 1567 #endif 1568 break; 1569 1570 case OSIOCGIFADDR: 1571 cmd = SIOCGIFADDR; 1572 break; 1573 1574 case OSIOCGIFDSTADDR: 1575 cmd = SIOCGIFDSTADDR; 1576 break; 1577 1578 case OSIOCGIFBRDADDR: 1579 cmd = SIOCGIFBRDADDR; 1580 break; 1581 1582 case OSIOCGIFNETMASK: 1583 cmd = SIOCGIFNETMASK; 1584 } 1585 1586 error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 1587 (struct mbuf *)cmd, (struct mbuf *)data, 1588 (struct mbuf *)ifp, p)); 1589 1590 switch (ocmd) { 1591 case OSIOCGIFADDR: 1592 case OSIOCGIFDSTADDR: 1593 case OSIOCGIFBRDADDR: 1594 case OSIOCGIFNETMASK: 1595 *(u_int16_t *)&ifr->ifr_addr = ifr->ifr_addr.sa_family; 1596 } 1597 } 1598 #endif /* COMPAT_43 */ 1599 break; 1600 } 1601 1602 if (((oif_flags ^ ifp->if_flags) & IFF_UP) != 0) { 1603 #ifdef INET6 1604 if ((ifp->if_flags & IFF_UP) != 0) { 1605 s = splnet(); 1606 in6_if_up(ifp); 1607 splx(s); 1608 } 1609 #endif 1610 } 1611 1612 return (error); 1613 } 1614 1615 /* 1616 * Return interface configuration 1617 * of system. List may be used 1618 * in later ioctl's (above) to get 1619 * other information. 1620 */ 1621 /*ARGSUSED*/ 1622 int 1623 ifconf(cmd, data) 1624 u_long cmd; 1625 caddr_t data; 1626 { 1627 struct ifconf *ifc = (struct ifconf *)data; 1628 struct ifnet *ifp; 1629 struct ifaddr *ifa; 1630 struct ifreq ifr, *ifrp; 1631 int space = ifc->ifc_len, error = 0; 1632 const int sz = (int)sizeof(ifr); 1633 int sign; 1634 1635 if ((ifrp = ifc->ifc_req) == NULL) { 1636 space = 0; 1637 sign = -1; 1638 } else { 1639 sign = 1; 1640 } 1641 TAILQ_FOREACH(ifp, &ifnet, if_list) { 1642 bcopy(ifp->if_xname, ifr.ifr_name, IFNAMSIZ); 1643 if ((ifa = TAILQ_FIRST(&ifp->if_addrlist)) == 0) { 1644 memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr)); 1645 if (ifrp != NULL && space >= sz) { 1646 error = copyout(&ifr, ifrp, sz); 1647 if (error) 1648 break; 1649 ifrp++; 1650 } 1651 space -= sizeof(ifr) * sign; 1652 continue; 1653 } 1654 1655 for (; ifa != 0; ifa = TAILQ_NEXT(ifa, ifa_list)) { 1656 struct sockaddr *sa = ifa->ifa_addr; 1657 #if defined(COMPAT_43) || defined(COMPAT_LINUX) || defined(COMPAT_SVR4) || defined(COMPAT_ULTRIX) 1658 if (cmd == OSIOCGIFCONF) { 1659 struct osockaddr *osa = 1660 (struct osockaddr *)&ifr.ifr_addr; 1661 /* 1662 * If it does not fit, we don't bother with it 1663 */ 1664 if (sa->sa_len > sizeof(*osa)) 1665 continue; 1666 ifr.ifr_addr = *sa; 1667 osa->sa_family = sa->sa_family; 1668 if (ifrp != NULL && space >= sz) { 1669 error = copyout(&ifr, ifrp, sz); 1670 ifrp++; 1671 } 1672 } else 1673 #endif 1674 if (sa->sa_len <= sizeof(*sa)) { 1675 ifr.ifr_addr = *sa; 1676 if (ifrp != NULL && space >= sz) { 1677 error = copyout(&ifr, ifrp, sz); 1678 ifrp++; 1679 } 1680 } else { 1681 space -= (sa->sa_len - sizeof(*sa)) * sign; 1682 if (ifrp != NULL && space >= sz) { 1683 error = copyout(&ifr, ifrp, 1684 sizeof(ifr.ifr_name)); 1685 if (error == 0) { 1686 error = copyout(sa, 1687 &ifrp->ifr_addr, 1688 sa->sa_len); 1689 } 1690 ifrp = (struct ifreq *) 1691 (sa->sa_len + 1692 (caddr_t)&ifrp->ifr_addr); 1693 } 1694 } 1695 if (error) 1696 break; 1697 space -= sz * sign; 1698 } 1699 } 1700 if (ifrp != NULL) 1701 ifc->ifc_len -= space; 1702 else 1703 ifc->ifc_len = space; 1704 return (error); 1705 } 1706 1707 #if defined(INET) || defined(INET6) 1708 static void 1709 sysctl_net_ifq_setup(struct sysctllog **clog, 1710 int pf, const char *pfname, 1711 int ipn, const char *ipname, 1712 int qid, struct ifqueue *ifq) 1713 { 1714 1715 sysctl_createv(clog, 0, NULL, NULL, 1716 CTLFLAG_PERMANENT, 1717 CTLTYPE_NODE, "net", NULL, 1718 NULL, 0, NULL, 0, 1719 CTL_NET, CTL_EOL); 1720 sysctl_createv(clog, 0, NULL, NULL, 1721 CTLFLAG_PERMANENT, 1722 CTLTYPE_NODE, pfname, NULL, 1723 NULL, 0, NULL, 0, 1724 CTL_NET, pf, CTL_EOL); 1725 sysctl_createv(clog, 0, NULL, NULL, 1726 CTLFLAG_PERMANENT, 1727 CTLTYPE_NODE, ipname, NULL, 1728 NULL, 0, NULL, 0, 1729 CTL_NET, pf, ipn, CTL_EOL); 1730 sysctl_createv(clog, 0, NULL, NULL, 1731 CTLFLAG_PERMANENT, 1732 CTLTYPE_NODE, "ifq", 1733 SYSCTL_DESCR("Protocol input queue controls"), 1734 NULL, 0, NULL, 0, 1735 CTL_NET, pf, ipn, qid, CTL_EOL); 1736 1737 sysctl_createv(clog, 0, NULL, NULL, 1738 CTLFLAG_PERMANENT, 1739 CTLTYPE_INT, "len", 1740 SYSCTL_DESCR("Current input queue length"), 1741 NULL, 0, &ifq->ifq_len, 0, 1742 CTL_NET, pf, ipn, qid, IFQCTL_LEN, CTL_EOL); 1743 sysctl_createv(clog, 0, NULL, NULL, 1744 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1745 CTLTYPE_INT, "maxlen", 1746 SYSCTL_DESCR("Maximum allowed input queue length"), 1747 NULL, 0, &ifq->ifq_maxlen, 0, 1748 CTL_NET, pf, ipn, qid, IFQCTL_MAXLEN, CTL_EOL); 1749 #ifdef notyet 1750 sysctl_createv(clog, 0, NULL, NULL, 1751 CTLFLAG_PERMANENT, 1752 CTLTYPE_INT, "peak", 1753 SYSCTL_DESCR("Highest input queue length"), 1754 NULL, 0, &ifq->ifq_peak, 0, 1755 CTL_NET, pf, ipn, qid, IFQCTL_PEAK, CTL_EOL); 1756 #endif 1757 sysctl_createv(clog, 0, NULL, NULL, 1758 CTLFLAG_PERMANENT, 1759 CTLTYPE_INT, "drops", 1760 SYSCTL_DESCR("Packets dropped due to full input queue"), 1761 NULL, 0, &ifq->ifq_drops, 0, 1762 CTL_NET, pf, ipn, qid, IFQCTL_DROPS, CTL_EOL); 1763 } 1764 1765 #ifdef INET 1766 SYSCTL_SETUP(sysctl_net_inet_ip_ifq_setup, 1767 "sysctl net.inet.ip.ifq subtree setup") 1768 { 1769 extern struct ifqueue ipintrq; 1770 1771 sysctl_net_ifq_setup(clog, PF_INET, "inet", IPPROTO_IP, "ip", 1772 IPCTL_IFQ, &ipintrq); 1773 } 1774 #endif /* INET */ 1775 1776 #ifdef INET6 1777 SYSCTL_SETUP(sysctl_net_inet6_ip6_ifq_setup, 1778 "sysctl net.inet6.ip6.ifq subtree setup") 1779 { 1780 extern struct ifqueue ip6intrq; 1781 1782 sysctl_net_ifq_setup(clog, PF_INET6, "inet6", IPPROTO_IPV6, "ip6", 1783 IPV6CTL_IFQ, &ip6intrq); 1784 } 1785 #endif /* INET6 */ 1786 #endif /* INET || INET6 */ 1787
Indexes created Tue Sep 23 14:10:03 GMT 2025