if.c revision 1.124
1 /* $NetBSD: if.c,v 1.124 2003/07/06 07:54:43 dyoung Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2000, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by William 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. All advertising materials mentioning features or use of this software 81 * must display the following acknowledgement: 82 * This product includes software developed by the University of 83 * California, Berkeley and its contributors. 84 * 4. Neither the name of the University nor the names of its contributors 85 * may be used to endorse or promote products derived from this software 86 * without specific prior written permission. 87 * 88 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 89 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 90 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 91 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 92 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 93 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 94 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 95 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 96 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 97 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 98 * SUCH DAMAGE. 99 * 100 * @(#)if.c 8.5 (Berkeley) 1/9/95 101 */ 102 103 #include <sys/cdefs.h> 104 __KERNEL_RCSID(0, "$NetBSD: if.c,v 1.124 2003/07/06 07:54:43 dyoung Exp $"); 105 106 #include "opt_inet.h" 107 108 #include "opt_compat_linux.h" 109 #include "opt_compat_svr4.h" 110 #include "opt_compat_ultrix.h" 111 #include "opt_compat_43.h" 112 #include "opt_atalk.h" 113 #include "opt_ccitt.h" 114 #include "opt_natm.h" 115 #include "opt_pfil_hooks.h" 116 117 #include <sys/param.h> 118 #include <sys/mbuf.h> 119 #include <sys/systm.h> 120 #include <sys/callout.h> 121 #include <sys/proc.h> 122 #include <sys/socket.h> 123 #include <sys/socketvar.h> 124 #include <sys/domain.h> 125 #include <sys/protosw.h> 126 #include <sys/kernel.h> 127 #include <sys/ioctl.h> 128 129 #include <net/if.h> 130 #include <net/if_dl.h> 131 #include <net/if_ether.h> 132 #include <net/if_media.h> 133 #include <net/if_ieee80211.h> 134 #include <net/if_types.h> 135 #include <net/radix.h> 136 #include <net/route.h> 137 #include <net/netisr.h> 138 #ifdef NETATALK 139 #include <netatalk/at_extern.h> 140 #include <netatalk/at.h> 141 #endif 142 143 #ifdef INET6 144 #include <netinet/in.h> 145 #include <netinet6/in6_var.h> 146 #include <netinet6/nd6.h> 147 #endif 148 149 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 150 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 151 152 int ifqmaxlen = IFQ_MAXLEN; 153 struct callout if_slowtimo_ch; 154 155 int netisr; /* scheduling bits for network */ 156 157 int if_rt_walktree __P((struct radix_node *, void *)); 158 159 struct if_clone *if_clone_lookup __P((const char *, int *)); 160 int if_clone_list __P((struct if_clonereq *)); 161 162 LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners); 163 int if_cloners_count; 164 165 #if defined(INET) || defined(INET6) || defined(NETATALK) || defined(NS) || \ 166 defined(ISO) || defined(CCITT) || defined(NATM) 167 static void if_detach_queues __P((struct ifnet *, struct ifqueue *)); 168 #endif 169 170 /* 171 * Network interface utility routines. 172 * 173 * Routines with ifa_ifwith* names take sockaddr *'s as 174 * parameters. 175 */ 176 void 177 ifinit() 178 { 179 180 callout_init(&if_slowtimo_ch); 181 if_slowtimo(NULL); 182 } 183 184 /* 185 * Null routines used while an interface is going away. These routines 186 * just return an error. 187 */ 188 189 int 190 if_nulloutput(ifp, m, so, rt) 191 struct ifnet *ifp; 192 struct mbuf *m; 193 struct sockaddr *so; 194 struct rtentry *rt; 195 { 196 197 return (ENXIO); 198 } 199 200 void 201 if_nullinput(ifp, m) 202 struct ifnet *ifp; 203 struct mbuf *m; 204 { 205 206 /* Nothing. */ 207 } 208 209 void 210 if_nullstart(ifp) 211 struct ifnet *ifp; 212 { 213 214 /* Nothing. */ 215 } 216 217 int 218 if_nullioctl(ifp, cmd, data) 219 struct ifnet *ifp; 220 u_long cmd; 221 caddr_t data; 222 { 223 224 return (ENXIO); 225 } 226 227 int 228 if_nullinit(ifp) 229 struct ifnet *ifp; 230 { 231 232 return (ENXIO); 233 } 234 235 void 236 if_nullstop(ifp, disable) 237 struct ifnet *ifp; 238 int disable; 239 { 240 241 /* Nothing. */ 242 } 243 244 void 245 if_nullwatchdog(ifp) 246 struct ifnet *ifp; 247 { 248 249 /* Nothing. */ 250 } 251 252 void 253 if_nulldrain(ifp) 254 struct ifnet *ifp; 255 { 256 257 /* Nothing. */ 258 } 259 260 u_int if_index = 1; 261 struct ifnet_head ifnet; 262 struct ifaddr **ifnet_addrs = NULL; 263 struct ifnet **ifindex2ifnet = NULL; 264 265 /* 266 * Allocate the link level name for the specified interface. This 267 * is an attachment helper. It must be called after ifp->if_addrlen 268 * is initialized, which may not be the case when if_attach() is 269 * called. 270 */ 271 void 272 if_alloc_sadl(struct ifnet *ifp) 273 { 274 unsigned socksize, ifasize; 275 int namelen, masklen; 276 struct sockaddr_dl *sdl; 277 struct ifaddr *ifa; 278 279 /* 280 * If the interface already has a link name, release it 281 * now. This is useful for interfaces that can change 282 * link types, and thus switch link names often. 283 */ 284 if (ifp->if_sadl != NULL) 285 if_free_sadl(ifp); 286 287 namelen = strlen(ifp->if_xname); 288 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + namelen; 289 socksize = masklen + ifp->if_addrlen; 290 #define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1))) 291 if (socksize < sizeof(*sdl)) 292 socksize = sizeof(*sdl); 293 socksize = ROUNDUP(socksize); 294 ifasize = sizeof(*ifa) + 2 * socksize; 295 ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK); 296 memset((caddr_t)ifa, 0, ifasize); 297 sdl = (struct sockaddr_dl *)(ifa + 1); 298 sdl->sdl_len = socksize; 299 sdl->sdl_family = AF_LINK; 300 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 301 sdl->sdl_nlen = namelen; 302 sdl->sdl_alen = ifp->if_addrlen; 303 sdl->sdl_index = ifp->if_index; 304 sdl->sdl_type = ifp->if_type; 305 ifnet_addrs[ifp->if_index] = ifa; 306 IFAREF(ifa); 307 ifa->ifa_ifp = ifp; 308 ifa->ifa_rtrequest = link_rtrequest; 309 TAILQ_INSERT_HEAD(&ifp->if_addrlist, ifa, ifa_list); 310 IFAREF(ifa); 311 ifa->ifa_addr = (struct sockaddr *)sdl; 312 ifp->if_sadl = sdl; 313 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 314 ifa->ifa_netmask = (struct sockaddr *)sdl; 315 sdl->sdl_len = masklen; 316 while (namelen != 0) 317 sdl->sdl_data[--namelen] = 0xff; 318 } 319 320 /* 321 * Free the link level name for the specified interface. This is 322 * a detach helper. This is called from if_detach() or from 323 * link layer type specific detach functions. 324 */ 325 void 326 if_free_sadl(struct ifnet *ifp) 327 { 328 struct ifaddr *ifa; 329 int s; 330 331 ifa = ifnet_addrs[ifp->if_index]; 332 if (ifa == NULL) { 333 KASSERT(ifp->if_sadl == NULL); 334 return; 335 } 336 337 KASSERT(ifp->if_sadl != NULL); 338 339 s = splnet(); 340 rtinit(ifa, RTM_DELETE, 0); 341 TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list); 342 IFAFREE(ifa); 343 344 ifp->if_sadl = NULL; 345 346 ifnet_addrs[ifp->if_index] = NULL; 347 IFAFREE(ifa); 348 splx(s); 349 } 350 351 /* 352 * Attach an interface to the 353 * list of "active" interfaces. 354 */ 355 void 356 if_attach(ifp) 357 struct ifnet *ifp; 358 { 359 static size_t if_indexlim = 0; 360 int indexlim = 0; 361 362 if (if_indexlim == 0) { 363 TAILQ_INIT(&ifnet); 364 if_indexlim = 8; 365 } 366 TAILQ_INIT(&ifp->if_addrlist); 367 TAILQ_INSERT_TAIL(&ifnet, ifp, if_list); 368 ifp->if_index = if_index; 369 if (ifindex2ifnet == 0) 370 if_index++; 371 else 372 while (ifindex2ifnet[ifp->if_index] != NULL) { 373 ++if_index; 374 if (if_index == 0) 375 if_index = 1; 376 /* 377 * If we hit USHRT_MAX, we skip back to 0 since 378 * there are a number of places where the value 379 * of if_index or if_index itself is compared 380 * to or stored in an unsigned short. By 381 * jumping back, we won't botch those assignments 382 * or comparisons. 383 */ 384 else if (if_index == USHRT_MAX) { 385 /* 386 * However, if we have to jump back to 387 * zero *twice* without finding an empty 388 * slot in ifindex2ifnet[], then there 389 * there are too many (>65535) interfaces. 390 */ 391 if (indexlim++) 392 panic("too many interfaces"); 393 else 394 if_index = 1; 395 } 396 ifp->if_index = if_index; 397 } 398 399 /* 400 * We have some arrays that should be indexed by if_index. 401 * since if_index will grow dynamically, they should grow too. 402 * struct ifadd **ifnet_addrs 403 * struct ifnet **ifindex2ifnet 404 */ 405 if (ifnet_addrs == 0 || ifindex2ifnet == 0 || 406 ifp->if_index >= if_indexlim) { 407 size_t n; 408 caddr_t q; 409 410 while (ifp->if_index >= if_indexlim) 411 if_indexlim <<= 1; 412 413 /* grow ifnet_addrs */ 414 n = if_indexlim * sizeof(struct ifaddr *); 415 q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK); 416 memset(q, 0, n); 417 if (ifnet_addrs) { 418 bcopy((caddr_t)ifnet_addrs, q, n/2); 419 free((caddr_t)ifnet_addrs, M_IFADDR); 420 } 421 ifnet_addrs = (struct ifaddr **)q; 422 423 /* grow ifindex2ifnet */ 424 n = if_indexlim * sizeof(struct ifnet *); 425 q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK); 426 memset(q, 0, n); 427 if (ifindex2ifnet) { 428 bcopy((caddr_t)ifindex2ifnet, q, n/2); 429 free((caddr_t)ifindex2ifnet, M_IFADDR); 430 } 431 ifindex2ifnet = (struct ifnet **)q; 432 } 433 434 ifindex2ifnet[ifp->if_index] = ifp; 435 436 /* 437 * Link level name is allocated later by a separate call to 438 * if_alloc_sadl(). 439 */ 440 441 if (ifp->if_snd.ifq_maxlen == 0) 442 ifp->if_snd.ifq_maxlen = ifqmaxlen; 443 ifp->if_broadcastaddr = 0; /* reliably crash if used uninitialized */ 444 445 ifp->if_link_state = LINK_STATE_UNKNOWN; 446 447 ifp->if_capenable = 0; 448 ifp->if_csum_flags_tx = 0; 449 ifp->if_csum_flags_rx = 0; 450 451 #ifdef ALTQ 452 ifp->if_snd.altq_type = 0; 453 ifp->if_snd.altq_disc = NULL; 454 ifp->if_snd.altq_flags &= ALTQF_CANTCHANGE; 455 ifp->if_snd.altq_tbr = NULL; 456 ifp->if_snd.altq_ifp = ifp; 457 #endif 458 459 #ifdef PFIL_HOOKS 460 ifp->if_pfil.ph_type = PFIL_TYPE_IFNET; 461 ifp->if_pfil.ph_ifnet = ifp; 462 if (pfil_head_register(&ifp->if_pfil) != 0) 463 printf("%s: WARNING: unable to register pfil hook\n", 464 ifp->if_xname); 465 #endif 466 467 if (domains) 468 if_attachdomain1(ifp); 469 470 /* Announce the interface. */ 471 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 472 } 473 474 void 475 if_attachdomain() 476 { 477 struct ifnet *ifp; 478 int s; 479 480 s = splnet(); 481 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) 482 if_attachdomain1(ifp); 483 splx(s); 484 } 485 486 void 487 if_attachdomain1(ifp) 488 struct ifnet *ifp; 489 { 490 struct domain *dp; 491 int s; 492 493 s = splnet(); 494 495 /* address family dependent data region */ 496 memset(ifp->if_afdata, 0, sizeof(ifp->if_afdata)); 497 for (dp = domains; dp; dp = dp->dom_next) { 498 if (dp->dom_ifattach) 499 ifp->if_afdata[dp->dom_family] = 500 (*dp->dom_ifattach)(ifp); 501 } 502 503 splx(s); 504 } 505 506 /* 507 * Deactivate an interface. This points all of the procedure 508 * handles at error stubs. May be called from interrupt context. 509 */ 510 void 511 if_deactivate(ifp) 512 struct ifnet *ifp; 513 { 514 int s; 515 516 s = splnet(); 517 518 ifp->if_output = if_nulloutput; 519 ifp->if_input = if_nullinput; 520 ifp->if_start = if_nullstart; 521 ifp->if_ioctl = if_nullioctl; 522 ifp->if_init = if_nullinit; 523 ifp->if_stop = if_nullstop; 524 ifp->if_watchdog = if_nullwatchdog; 525 ifp->if_drain = if_nulldrain; 526 527 /* No more packets may be enqueued. */ 528 ifp->if_snd.ifq_maxlen = 0; 529 530 splx(s); 531 } 532 533 /* 534 * Detach an interface from the list of "active" interfaces, 535 * freeing any resources as we go along. 536 * 537 * NOTE: This routine must be called with a valid thread context, 538 * as it may block. 539 */ 540 void 541 if_detach(ifp) 542 struct ifnet *ifp; 543 { 544 struct socket so; 545 struct ifaddr *ifa, *next; 546 #ifdef IFAREF_DEBUG 547 struct ifaddr *last_ifa = NULL; 548 #endif 549 struct domain *dp; 550 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 #ifdef PFIL_HOOKS 575 (void) pfil_head_unregister(&ifp->if_pfil); 576 #endif 577 578 /* 579 * Rip all the addresses off the interface. This should make 580 * all of the routes go away. 581 */ 582 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa; ifa = next) { 583 next = TAILQ_NEXT(ifa, ifa_list); 584 family = ifa->ifa_addr->sa_family; 585 #ifdef IFAREF_DEBUG 586 printf("if_detach: ifaddr %p, family %d, refcnt %d\n", 587 ifa, family, ifa->ifa_refcnt); 588 if (last_ifa != NULL && ifa == last_ifa) 589 panic("if_detach: loop detected"); 590 last_ifa = ifa; 591 #endif 592 if (family == AF_LINK) 593 continue; 594 dp = pffinddomain(family); 595 #ifdef DIAGNOSTIC 596 if (dp == NULL) 597 panic("if_detach: no domain for AF %d", 598 family); 599 #endif 600 purged = 0; 601 for (pr = dp->dom_protosw; 602 pr < dp->dom_protoswNPROTOSW; pr++) { 603 so.so_proto = pr; 604 if (pr->pr_usrreq != NULL) { 605 (void) (*pr->pr_usrreq)(&so, 606 PRU_PURGEIF, NULL, NULL, 607 (struct mbuf *) ifp, curproc); 608 purged = 1; 609 } 610 } 611 if (purged == 0) { 612 /* 613 * XXX What's really the best thing to do 614 * XXX here? --thorpej (at) netbsd.org 615 */ 616 printf("if_detach: WARNING: AF %d not purged\n", 617 family); 618 } 619 } 620 621 if_free_sadl(ifp); 622 623 /* Walk the routing table looking for straglers. */ 624 for (i = 0; i <= AF_MAX; i++) { 625 if ((rnh = rt_tables[i]) != NULL) 626 (void) (*rnh->rnh_walktree)(rnh, if_rt_walktree, ifp); 627 } 628 629 for (dp = domains; dp; dp = dp->dom_next) { 630 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 631 (*dp->dom_ifdetach)(ifp, 632 ifp->if_afdata[dp->dom_family]); 633 } 634 635 /* Announce that the interface is gone. */ 636 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 637 638 ifindex2ifnet[ifp->if_index] = NULL; 639 640 TAILQ_REMOVE(&ifnet, ifp, if_list); 641 642 /* 643 * remove packets came from ifp, from software interrupt queues. 644 * net/netisr_dispatch.h is not usable, as some of them use 645 * strange queue names. 646 */ 647 #define IF_DETACH_QUEUES(x) \ 648 do { \ 649 extern struct ifqueue x; \ 650 if_detach_queues(ifp, & x); \ 651 } while (/*CONSTCOND*/ 0) 652 #ifdef INET 653 #if NARP > 0 654 IF_DETACH_QUEUES(arpintrq); 655 #endif 656 IF_DETACH_QUEUES(ipintrq); 657 #endif 658 #ifdef INET6 659 IF_DETACH_QUEUES(ip6intrq); 660 #endif 661 #ifdef NETATALK 662 IF_DETACH_QUEUES(atintrq1); 663 IF_DETACH_QUEUES(atintrq2); 664 #endif 665 #ifdef NS 666 IF_DETACH_QUEUES(nsintrq); 667 #endif 668 #ifdef ISO 669 IF_DETACH_QUEUES(clnlintrq); 670 #endif 671 #ifdef CCITT 672 IF_DETACH_QUEUES(llcintrq); 673 IF_DETACH_QUEUES(hdintrq); 674 #endif 675 #ifdef NATM 676 IF_DETACH_QUEUES(natmintrq); 677 #endif 678 #undef IF_DETACH_QUEUES 679 680 splx(s); 681 } 682 683 #if defined(INET) || defined(INET6) || defined(NETATALK) || defined(NS) || \ 684 defined(ISO) || defined(CCITT) || defined(NATM) 685 static void 686 if_detach_queues(ifp, q) 687 struct ifnet *ifp; 688 struct ifqueue *q; 689 { 690 struct mbuf *m, *prev, *next; 691 692 prev = NULL; 693 for (m = q->ifq_head; m; m = next) { 694 next = m->m_nextpkt; 695 #ifdef DIAGNOSTIC 696 if ((m->m_flags & M_PKTHDR) == 0) { 697 prev = m; 698 continue; 699 } 700 #endif 701 if (m->m_pkthdr.rcvif != ifp) { 702 prev = m; 703 continue; 704 } 705 706 if (prev) 707 prev->m_nextpkt = m->m_nextpkt; 708 else 709 q->ifq_head = m->m_nextpkt; 710 if (q->ifq_tail == m) 711 q->ifq_tail = prev; 712 q->ifq_len--; 713 714 m->m_nextpkt = NULL; 715 m_freem(m); 716 IF_DROP(q); 717 } 718 } 719 #endif /* defined(INET) || ... */ 720 721 /* 722 * Callback for a radix tree walk to delete all references to an 723 * ifnet. 724 */ 725 int 726 if_rt_walktree(rn, v) 727 struct radix_node *rn; 728 void *v; 729 { 730 struct ifnet *ifp = (struct ifnet *)v; 731 struct rtentry *rt = (struct rtentry *)rn; 732 int error; 733 734 if (rt->rt_ifp == ifp) { 735 /* Delete the entry. */ 736 error = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, 737 rt_mask(rt), rt->rt_flags, NULL); 738 if (error) 739 printf("%s: warning: unable to delete rtentry @ %p, " 740 "error = %d\n", ifp->if_xname, rt, error); 741 } 742 return (0); 743 } 744 745 /* 746 * Create a clone network interface. 747 */ 748 int 749 if_clone_create(name) 750 const char *name; 751 { 752 struct if_clone *ifc; 753 int unit; 754 755 ifc = if_clone_lookup(name, &unit); 756 if (ifc == NULL) 757 return (EINVAL); 758 759 if (ifunit(name) != NULL) 760 return (EEXIST); 761 762 return ((*ifc->ifc_create)(ifc, unit)); 763 } 764 765 /* 766 * Destroy a clone network interface. 767 */ 768 int 769 if_clone_destroy(name) 770 const char *name; 771 { 772 struct if_clone *ifc; 773 struct ifnet *ifp; 774 775 ifc = if_clone_lookup(name, NULL); 776 if (ifc == NULL) 777 return (EINVAL); 778 779 ifp = ifunit(name); 780 if (ifp == NULL) 781 return (ENXIO); 782 783 if (ifc->ifc_destroy == NULL) 784 return (EOPNOTSUPP); 785 786 (*ifc->ifc_destroy)(ifp); 787 return (0); 788 } 789 790 /* 791 * Look up a network interface cloner. 792 */ 793 struct if_clone * 794 if_clone_lookup(name, unitp) 795 const char *name; 796 int *unitp; 797 { 798 struct if_clone *ifc; 799 const char *cp; 800 size_t i; 801 802 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL;) { 803 for (cp = name, i = 0; i < ifc->ifc_namelen; i++, cp++) { 804 if (ifc->ifc_name[i] != *cp) 805 goto next_ifc; 806 } 807 goto found_name; 808 next_ifc: 809 ifc = LIST_NEXT(ifc, ifc_list); 810 } 811 812 /* No match. */ 813 return (NULL); 814 815 found_name: 816 for (i = 0; *cp != '\0'; cp++) { 817 if (*cp < '0' || *cp > '9') { 818 /* Bogus unit number. */ 819 return (NULL); 820 } 821 i = (i * 10) + (*cp - '0'); 822 } 823 824 if (unitp != NULL) 825 *unitp = i; 826 return (ifc); 827 } 828 829 /* 830 * Register a network interface cloner. 831 */ 832 void 833 if_clone_attach(ifc) 834 struct if_clone *ifc; 835 { 836 837 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list); 838 if_cloners_count++; 839 } 840 841 /* 842 * Unregister a network interface cloner. 843 */ 844 void 845 if_clone_detach(ifc) 846 struct if_clone *ifc; 847 { 848 849 LIST_REMOVE(ifc, ifc_list); 850 if_cloners_count--; 851 } 852 853 /* 854 * Provide list of interface cloners to userspace. 855 */ 856 int 857 if_clone_list(ifcr) 858 struct if_clonereq *ifcr; 859 { 860 char outbuf[IFNAMSIZ], *dst; 861 struct if_clone *ifc; 862 int count, error = 0; 863 864 ifcr->ifcr_total = if_cloners_count; 865 if ((dst = ifcr->ifcr_buffer) == NULL) { 866 /* Just asking how many there are. */ 867 return (0); 868 } 869 870 if (ifcr->ifcr_count < 0) 871 return (EINVAL); 872 873 count = (if_cloners_count < ifcr->ifcr_count) ? 874 if_cloners_count : ifcr->ifcr_count; 875 876 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0; 877 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) { 878 strncpy(outbuf, ifc->ifc_name, IFNAMSIZ); 879 outbuf[IFNAMSIZ - 1] = '\0'; /* sanity */ 880 error = copyout(outbuf, dst, IFNAMSIZ); 881 if (error) 882 break; 883 } 884 885 return (error); 886 } 887 888 /* 889 * Locate an interface based on a complete address. 890 */ 891 /*ARGSUSED*/ 892 struct ifaddr * 893 ifa_ifwithaddr(addr) 894 struct sockaddr *addr; 895 { 896 struct ifnet *ifp; 897 struct ifaddr *ifa; 898 899 #define equal(a1, a2) \ 900 (bcmp((caddr_t)(a1), (caddr_t)(a2), ((struct sockaddr *)(a1))->sa_len) == 0) 901 902 for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL; 903 ifp = TAILQ_NEXT(ifp, if_list)) { 904 if (ifp->if_output == if_nulloutput) 905 continue; 906 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; 907 ifa = TAILQ_NEXT(ifa, ifa_list)) { 908 if (ifa->ifa_addr->sa_family != addr->sa_family) 909 continue; 910 if (equal(addr, ifa->ifa_addr)) 911 return (ifa); 912 if ((ifp->if_flags & IFF_BROADCAST) && 913 ifa->ifa_broadaddr && 914 /* IP6 doesn't have broadcast */ 915 ifa->ifa_broadaddr->sa_len != 0 && 916 equal(ifa->ifa_broadaddr, addr)) 917 return (ifa); 918 } 919 } 920 return (NULL); 921 } 922 923 /* 924 * Locate the point to point interface with a given destination address. 925 */ 926 /*ARGSUSED*/ 927 struct ifaddr * 928 ifa_ifwithdstaddr(addr) 929 struct sockaddr *addr; 930 { 931 struct ifnet *ifp; 932 struct ifaddr *ifa; 933 934 for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL; 935 ifp = TAILQ_NEXT(ifp, if_list)) { 936 if (ifp->if_output == if_nulloutput) 937 continue; 938 if (ifp->if_flags & IFF_POINTOPOINT) { 939 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; 940 ifa = TAILQ_NEXT(ifa, ifa_list)) { 941 if (ifa->ifa_addr->sa_family != 942 addr->sa_family || 943 ifa->ifa_dstaddr == NULL) 944 continue; 945 if (equal(addr, ifa->ifa_dstaddr)) 946 return (ifa); 947 } 948 } 949 } 950 return (NULL); 951 } 952 953 /* 954 * Find an interface on a specific network. If many, choice 955 * is most specific found. 956 */ 957 struct ifaddr * 958 ifa_ifwithnet(addr) 959 struct sockaddr *addr; 960 { 961 struct ifnet *ifp; 962 struct ifaddr *ifa; 963 struct sockaddr_dl *sdl; 964 struct ifaddr *ifa_maybe = 0; 965 u_int af = addr->sa_family; 966 char *addr_data = addr->sa_data, *cplim; 967 968 if (af == AF_LINK) { 969 sdl = (struct sockaddr_dl *)addr; 970 if (sdl->sdl_index && sdl->sdl_index <= if_index && 971 ifindex2ifnet[sdl->sdl_index]->if_output != if_nulloutput) 972 return (ifnet_addrs[sdl->sdl_index]); 973 } 974 #ifdef NETATALK 975 if (af == AF_APPLETALK) { 976 struct sockaddr_at *sat, *sat2; 977 sat = (struct sockaddr_at *)addr; 978 for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL; 979 ifp = TAILQ_NEXT(ifp, if_list)) { 980 if (ifp->if_output == if_nulloutput) 981 continue; 982 ifa = at_ifawithnet((struct sockaddr_at *)addr, ifp); 983 if (ifa == NULL) 984 continue; 985 sat2 = (struct sockaddr_at *)ifa->ifa_addr; 986 if (sat2->sat_addr.s_net == sat->sat_addr.s_net) 987 return (ifa); /* exact match */ 988 if (ifa_maybe == NULL) { 989 /* else keep the if with the right range */ 990 ifa_maybe = ifa; 991 } 992 } 993 return (ifa_maybe); 994 } 995 #endif 996 for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL; 997 ifp = TAILQ_NEXT(ifp, if_list)) { 998 if (ifp->if_output == if_nulloutput) 999 continue; 1000 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; 1001 ifa = TAILQ_NEXT(ifa, ifa_list)) { 1002 char *cp, *cp2, *cp3; 1003 1004 if (ifa->ifa_addr->sa_family != af || 1005 ifa->ifa_netmask == 0) 1006 next: continue; 1007 cp = addr_data; 1008 cp2 = ifa->ifa_addr->sa_data; 1009 cp3 = ifa->ifa_netmask->sa_data; 1010 cplim = (char *)ifa->ifa_netmask + 1011 ifa->ifa_netmask->sa_len; 1012 while (cp3 < cplim) { 1013 if ((*cp++ ^ *cp2++) & *cp3++) { 1014 /* want to continue for() loop */ 1015 goto next; 1016 } 1017 } 1018 if (ifa_maybe == 0 || 1019 rn_refines((caddr_t)ifa->ifa_netmask, 1020 (caddr_t)ifa_maybe->ifa_netmask)) 1021 ifa_maybe = ifa; 1022 } 1023 } 1024 return (ifa_maybe); 1025 } 1026 1027 /* 1028 * Find the interface of the addresss. 1029 */ 1030 struct ifaddr * 1031 ifa_ifwithladdr(addr) 1032 struct sockaddr *addr; 1033 { 1034 struct ifaddr *ia; 1035 1036 if ((ia = ifa_ifwithaddr(addr)) || (ia = ifa_ifwithdstaddr(addr)) || 1037 (ia = ifa_ifwithnet(addr))) 1038 return (ia); 1039 return (NULL); 1040 } 1041 1042 /* 1043 * Find an interface using a specific address family 1044 */ 1045 struct ifaddr * 1046 ifa_ifwithaf(af) 1047 int af; 1048 { 1049 struct ifnet *ifp; 1050 struct ifaddr *ifa; 1051 1052 for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL; 1053 ifp = TAILQ_NEXT(ifp, if_list)) { 1054 if (ifp->if_output == if_nulloutput) 1055 continue; 1056 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; 1057 ifa = TAILQ_NEXT(ifa, ifa_list)) { 1058 if (ifa->ifa_addr->sa_family == af) 1059 return (ifa); 1060 } 1061 } 1062 return (NULL); 1063 } 1064 1065 /* 1066 * Find an interface address specific to an interface best matching 1067 * a given address. 1068 */ 1069 struct ifaddr * 1070 ifaof_ifpforaddr(addr, ifp) 1071 struct sockaddr *addr; 1072 struct ifnet *ifp; 1073 { 1074 struct ifaddr *ifa; 1075 char *cp, *cp2, *cp3; 1076 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 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; 1087 ifa = TAILQ_NEXT(ifa, ifa_list)) { 1088 if (ifa->ifa_addr->sa_family != af) 1089 continue; 1090 ifa_maybe = ifa; 1091 if (ifa->ifa_netmask == 0) { 1092 if (equal(addr, ifa->ifa_addr) || 1093 (ifa->ifa_dstaddr && 1094 equal(addr, ifa->ifa_dstaddr))) 1095 return (ifa); 1096 continue; 1097 } 1098 cp = addr->sa_data; 1099 cp2 = ifa->ifa_addr->sa_data; 1100 cp3 = ifa->ifa_netmask->sa_data; 1101 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1102 for (; cp3 < cplim; cp3++) { 1103 if ((*cp++ ^ *cp2++) & *cp3) 1104 break; 1105 } 1106 if (cp3 == cplim) 1107 return (ifa); 1108 } 1109 return (ifa_maybe); 1110 } 1111 1112 /* 1113 * Default action when installing a route with a Link Level gateway. 1114 * Lookup an appropriate real ifa to point to. 1115 * This should be moved to /sys/net/link.c eventually. 1116 */ 1117 void 1118 link_rtrequest(cmd, rt, info) 1119 int cmd; 1120 struct rtentry *rt; 1121 struct rt_addrinfo *info; 1122 { 1123 struct ifaddr *ifa; 1124 struct sockaddr *dst; 1125 struct ifnet *ifp; 1126 1127 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) || 1128 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0)) 1129 return; 1130 if ((ifa = ifaof_ifpforaddr(dst, ifp)) != NULL) { 1131 IFAFREE(rt->rt_ifa); 1132 rt->rt_ifa = ifa; 1133 IFAREF(ifa); 1134 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1135 ifa->ifa_rtrequest(cmd, rt, info); 1136 } 1137 } 1138 1139 /* 1140 * Mark an interface down and notify protocols of 1141 * the transition. 1142 * NOTE: must be called at splsoftnet or equivalent. 1143 */ 1144 void 1145 if_down(ifp) 1146 struct ifnet *ifp; 1147 { 1148 struct ifaddr *ifa; 1149 1150 ifp->if_flags &= ~IFF_UP; 1151 microtime(&ifp->if_lastchange); 1152 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; 1153 ifa = TAILQ_NEXT(ifa, ifa_list)) 1154 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1155 IFQ_PURGE(&ifp->if_snd); 1156 rt_ifmsg(ifp); 1157 } 1158 1159 /* 1160 * Mark an interface up and notify protocols of 1161 * the transition. 1162 * NOTE: must be called at splsoftnet or equivalent. 1163 */ 1164 void 1165 if_up(ifp) 1166 struct ifnet *ifp; 1167 { 1168 #ifdef notyet 1169 struct ifaddr *ifa; 1170 #endif 1171 1172 ifp->if_flags |= IFF_UP; 1173 microtime(&ifp->if_lastchange); 1174 #ifdef notyet 1175 /* this has no effect on IP, and will kill all ISO connections XXX */ 1176 for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; 1177 ifa = TAILQ_NEXT(ifa, ifa_list)) 1178 pfctlinput(PRC_IFUP, ifa->ifa_addr); 1179 #endif 1180 rt_ifmsg(ifp); 1181 #ifdef INET6 1182 in6_if_up(ifp); 1183 #endif 1184 } 1185 1186 /* 1187 * Handle interface watchdog timer routines. Called 1188 * from softclock, we decrement timers (if set) and 1189 * call the appropriate interface routine on expiration. 1190 */ 1191 void 1192 if_slowtimo(arg) 1193 void *arg; 1194 { 1195 struct ifnet *ifp; 1196 int s = splnet(); 1197 1198 for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL; 1199 ifp = TAILQ_NEXT(ifp, if_list)) { 1200 if (ifp->if_timer == 0 || --ifp->if_timer) 1201 continue; 1202 if (ifp->if_watchdog) 1203 (*ifp->if_watchdog)(ifp); 1204 } 1205 splx(s); 1206 callout_reset(&if_slowtimo_ch, hz / IFNET_SLOWHZ, 1207 if_slowtimo, NULL); 1208 } 1209 1210 /* 1211 * Set/clear promiscuous mode on interface ifp based on the truth value 1212 * of pswitch. The calls are reference counted so that only the first 1213 * "on" request actually has an effect, as does the final "off" request. 1214 * Results are undefined if the "off" and "on" requests are not matched. 1215 */ 1216 int 1217 ifpromisc(ifp, pswitch) 1218 struct ifnet *ifp; 1219 int pswitch; 1220 { 1221 int pcount, ret; 1222 short flags; 1223 struct ifreq ifr; 1224 1225 pcount = ifp->if_pcount; 1226 flags = ifp->if_flags; 1227 if (pswitch) { 1228 /* 1229 * Allow the device to be "placed" into promiscuous 1230 * mode even if it is not configured up. It will 1231 * consult IFF_PROMISC when it is is brought up. 1232 */ 1233 if (ifp->if_pcount++ != 0) 1234 return (0); 1235 ifp->if_flags |= IFF_PROMISC; 1236 if ((ifp->if_flags & IFF_UP) == 0) 1237 return (0); 1238 } else { 1239 if (--ifp->if_pcount > 0) 1240 return (0); 1241 ifp->if_flags &= ~IFF_PROMISC; 1242 /* 1243 * If the device is not configured up, we should not need to 1244 * turn off promiscuous mode (device should have turned it 1245 * off when interface went down; and will look at IFF_PROMISC 1246 * again next time interface comes up). 1247 */ 1248 if ((ifp->if_flags & IFF_UP) == 0) 1249 return (0); 1250 } 1251 memset(&ifr, 0, sizeof(ifr)); 1252 ifr.ifr_flags = ifp->if_flags; 1253 ret = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t) &ifr); 1254 /* Restore interface state if not successful. */ 1255 if (ret != 0) { 1256 ifp->if_pcount = pcount; 1257 ifp->if_flags = flags; 1258 } 1259 return (ret); 1260 } 1261 1262 /* 1263 * Map interface name to 1264 * interface structure pointer. 1265 */ 1266 struct ifnet * 1267 ifunit(name) 1268 const char *name; 1269 { 1270 struct ifnet *ifp; 1271 const char *cp = name; 1272 u_int unit = 0; 1273 u_int i; 1274 1275 /* 1276 * If the entire name is a number, treat it as an ifindex. 1277 */ 1278 for (i = 0; i < IFNAMSIZ && *cp >= '0' && *cp <= '9'; i++, cp++) { 1279 unit = unit * 10 + (*cp - '0'); 1280 } 1281 1282 /* 1283 * If the number took all of the name, then it's a valid ifindex. 1284 */ 1285 if (i == IFNAMSIZ || (cp != name && *cp == '\0')) { 1286 if (unit >= if_index) 1287 return (NULL); 1288 ifp = ifindex2ifnet[unit]; 1289 if (ifp == NULL || ifp->if_output == if_nulloutput) 1290 return (NULL); 1291 return (ifp); 1292 } 1293 1294 for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL; 1295 ifp = TAILQ_NEXT(ifp, if_list)) { 1296 if (ifp->if_output == if_nulloutput) 1297 continue; 1298 if (strcmp(ifp->if_xname, name) == 0) 1299 return (ifp); 1300 } 1301 return (NULL); 1302 } 1303 1304 /* 1305 * Interface ioctls. 1306 */ 1307 int 1308 ifioctl(so, cmd, data, p) 1309 struct socket *so; 1310 u_long cmd; 1311 caddr_t data; 1312 struct proc *p; 1313 { 1314 struct ifnet *ifp; 1315 struct ifreq *ifr; 1316 struct ifcapreq *ifcr; 1317 struct ifdatareq *ifdr; 1318 int s, error = 0; 1319 short oif_flags; 1320 1321 switch (cmd) { 1322 1323 case SIOCGIFCONF: 1324 case OSIOCGIFCONF: 1325 return (ifconf(cmd, data)); 1326 } 1327 ifr = (struct ifreq *)data; 1328 ifcr = (struct ifcapreq *)data; 1329 ifdr = (struct ifdatareq *)data; 1330 1331 switch (cmd) { 1332 case SIOCIFCREATE: 1333 case SIOCIFDESTROY: 1334 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1335 return (error); 1336 return ((cmd == SIOCIFCREATE) ? 1337 if_clone_create(ifr->ifr_name) : 1338 if_clone_destroy(ifr->ifr_name)); 1339 1340 case SIOCIFGCLONERS: 1341 return (if_clone_list((struct if_clonereq *)data)); 1342 } 1343 1344 ifp = ifunit(ifr->ifr_name); 1345 if (ifp == 0) 1346 return (ENXIO); 1347 oif_flags = ifp->if_flags; 1348 switch (cmd) { 1349 1350 case SIOCGIFFLAGS: 1351 ifr->ifr_flags = ifp->if_flags; 1352 break; 1353 1354 case SIOCGIFMETRIC: 1355 ifr->ifr_metric = ifp->if_metric; 1356 break; 1357 1358 case SIOCGIFMTU: 1359 ifr->ifr_mtu = ifp->if_mtu; 1360 break; 1361 1362 case SIOCGIFDLT: 1363 ifr->ifr_dlt = ifp->if_dlt; 1364 break; 1365 1366 case SIOCSIFFLAGS: 1367 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1368 return (error); 1369 if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) { 1370 s = splnet(); 1371 if_down(ifp); 1372 splx(s); 1373 } 1374 if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) { 1375 s = splnet(); 1376 if_up(ifp); 1377 splx(s); 1378 } 1379 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 1380 (ifr->ifr_flags &~ IFF_CANTCHANGE); 1381 if (ifp->if_ioctl) 1382 (void) (*ifp->if_ioctl)(ifp, cmd, data); 1383 break; 1384 1385 case SIOCGIFCAP: 1386 ifcr->ifcr_capabilities = ifp->if_capabilities; 1387 ifcr->ifcr_capenable = ifp->if_capenable; 1388 break; 1389 1390 case SIOCSIFCAP: 1391 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1392 return (error); 1393 if ((ifcr->ifcr_capenable & ~ifp->if_capabilities) != 0) 1394 return (EINVAL); 1395 if (ifp->if_ioctl == NULL) 1396 return (EOPNOTSUPP); 1397 1398 /* Must prevent race with packet reception here. */ 1399 s = splnet(); 1400 if (ifcr->ifcr_capenable != ifp->if_capenable) { 1401 struct ifreq ifrq; 1402 1403 ifrq.ifr_flags = ifp->if_flags; 1404 ifp->if_capenable = ifcr->ifcr_capenable; 1405 1406 /* Pre-compute the checksum flags mask. */ 1407 ifp->if_csum_flags_tx = 0; 1408 ifp->if_csum_flags_rx = 0; 1409 if (ifp->if_capenable & IFCAP_CSUM_IPv4) { 1410 ifp->if_csum_flags_tx |= M_CSUM_IPv4; 1411 ifp->if_csum_flags_rx |= M_CSUM_IPv4; 1412 } 1413 1414 if (ifp->if_capenable & IFCAP_CSUM_TCPv4) { 1415 ifp->if_csum_flags_tx |= M_CSUM_TCPv4; 1416 ifp->if_csum_flags_rx |= M_CSUM_TCPv4; 1417 } else if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Rx) 1418 ifp->if_csum_flags_rx |= M_CSUM_TCPv4; 1419 1420 if (ifp->if_capenable & IFCAP_CSUM_UDPv4) { 1421 ifp->if_csum_flags_tx |= M_CSUM_UDPv4; 1422 ifp->if_csum_flags_rx |= M_CSUM_UDPv4; 1423 } else if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Rx) 1424 ifp->if_csum_flags_rx |= M_CSUM_UDPv4; 1425 1426 if (ifp->if_capenable & IFCAP_CSUM_TCPv6) { 1427 ifp->if_csum_flags_tx |= M_CSUM_TCPv6; 1428 ifp->if_csum_flags_rx |= M_CSUM_TCPv6; 1429 } 1430 1431 if (ifp->if_capenable & IFCAP_CSUM_UDPv6) { 1432 ifp->if_csum_flags_tx |= M_CSUM_UDPv6; 1433 ifp->if_csum_flags_rx |= M_CSUM_UDPv6; 1434 } 1435 1436 /* 1437 * Only kick the interface if it's up. If it's 1438 * not up now, it will notice the cap enables 1439 * when it is brought up later. 1440 */ 1441 if (ifp->if_flags & IFF_UP) 1442 (void) (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, 1443 (caddr_t) &ifrq); 1444 } 1445 splx(s); 1446 break; 1447 1448 case SIOCSIFMETRIC: 1449 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1450 return (error); 1451 ifp->if_metric = ifr->ifr_metric; 1452 break; 1453 1454 case SIOCGIFDATA: 1455 ifdr->ifdr_data = ifp->if_data; 1456 break; 1457 1458 case SIOCZIFDATA: 1459 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1460 return (error); 1461 ifdr->ifdr_data = ifp->if_data; 1462 /* 1463 * Assumes that the volatile counters that can be 1464 * zero'ed are at the end of if_data. 1465 */ 1466 memset(&ifp->if_data.ifi_ipackets, 0, sizeof(ifp->if_data) - 1467 offsetof(struct if_data, ifi_ipackets)); 1468 break; 1469 1470 case SIOCSIFMTU: 1471 { 1472 u_long oldmtu = ifp->if_mtu; 1473 1474 error = suser(p->p_ucred, &p->p_acflag); 1475 if (error) 1476 return (error); 1477 if (ifp->if_ioctl == NULL) 1478 return (EOPNOTSUPP); 1479 error = (*ifp->if_ioctl)(ifp, cmd, data); 1480 1481 /* 1482 * If the link MTU changed, do network layer specific procedure. 1483 */ 1484 if (ifp->if_mtu != oldmtu) { 1485 #ifdef INET6 1486 nd6_setmtu(ifp); 1487 #endif 1488 } 1489 break; 1490 } 1491 case SIOCSIFPHYADDR: 1492 case SIOCDIFPHYADDR: 1493 #ifdef INET6 1494 case SIOCSIFPHYADDR_IN6: 1495 #endif 1496 case SIOCSLIFPHYADDR: 1497 case SIOCADDMULTI: 1498 case SIOCDELMULTI: 1499 case SIOCSIFMEDIA: 1500 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1501 return (error); 1502 /* FALLTHROUGH */ 1503 case SIOCGIFPSRCADDR: 1504 case SIOCGIFPDSTADDR: 1505 case SIOCGLIFPHYADDR: 1506 case SIOCGIFMEDIA: 1507 if (ifp->if_ioctl == 0) 1508 return (EOPNOTSUPP); 1509 error = (*ifp->if_ioctl)(ifp, cmd, data); 1510 break; 1511 1512 case SIOCSDRVSPEC: 1513 case SIOCS80211NWID: 1514 case SIOCS80211NWKEY: 1515 case SIOCS80211POWER: 1516 case SIOCS80211BSSID: 1517 case SIOCS80211CHANNEL: 1518 /* XXX: need to pass proc pointer through to driver... */ 1519 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1520 return (error); 1521 /* FALLTHROUGH */ 1522 default: 1523 if (so->so_proto == 0) 1524 return (EOPNOTSUPP); 1525 #if !defined(COMPAT_43) && !defined(COMPAT_LINUX) && !defined(COMPAT_SVR4) && !defined(COMPAT_ULTRIX) && !defined(LKM) 1526 error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 1527 (struct mbuf *)cmd, (struct mbuf *)data, 1528 (struct mbuf *)ifp, p)); 1529 #else 1530 { 1531 int ocmd = cmd; 1532 1533 switch (cmd) { 1534 1535 case SIOCSIFADDR: 1536 case SIOCSIFDSTADDR: 1537 case SIOCSIFBRDADDR: 1538 case SIOCSIFNETMASK: 1539 #if BYTE_ORDER != BIG_ENDIAN 1540 if (ifr->ifr_addr.sa_family == 0 && 1541 ifr->ifr_addr.sa_len < 16) { 1542 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len; 1543 ifr->ifr_addr.sa_len = 16; 1544 } 1545 #else 1546 if (ifr->ifr_addr.sa_len == 0) 1547 ifr->ifr_addr.sa_len = 16; 1548 #endif 1549 break; 1550 1551 case OSIOCGIFADDR: 1552 cmd = SIOCGIFADDR; 1553 break; 1554 1555 case OSIOCGIFDSTADDR: 1556 cmd = SIOCGIFDSTADDR; 1557 break; 1558 1559 case OSIOCGIFBRDADDR: 1560 cmd = SIOCGIFBRDADDR; 1561 break; 1562 1563 case OSIOCGIFNETMASK: 1564 cmd = SIOCGIFNETMASK; 1565 } 1566 1567 error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 1568 (struct mbuf *)cmd, (struct mbuf *)data, 1569 (struct mbuf *)ifp, p)); 1570 1571 switch (ocmd) { 1572 case OSIOCGIFADDR: 1573 case OSIOCGIFDSTADDR: 1574 case OSIOCGIFBRDADDR: 1575 case OSIOCGIFNETMASK: 1576 *(u_int16_t *)&ifr->ifr_addr = ifr->ifr_addr.sa_family; 1577 } 1578 } 1579 #endif /* COMPAT_43 */ 1580 break; 1581 } 1582 1583 if (((oif_flags ^ ifp->if_flags) & IFF_UP) != 0) { 1584 #ifdef INET6 1585 if ((ifp->if_flags & IFF_UP) != 0) { 1586 s = splnet(); 1587 in6_if_up(ifp); 1588 splx(s); 1589 } 1590 #endif 1591 } 1592 1593 return (error); 1594 } 1595 1596 /* 1597 * Return interface configuration 1598 * of system. List may be used 1599 * in later ioctl's (above) to get 1600 * other information. 1601 */ 1602 /*ARGSUSED*/ 1603 int 1604 ifconf(cmd, data) 1605 u_long cmd; 1606 caddr_t data; 1607 { 1608 struct ifconf *ifc = (struct ifconf *)data; 1609 struct ifnet *ifp; 1610 struct ifaddr *ifa; 1611 struct ifreq ifr, *ifrp; 1612 int space = ifc->ifc_len, error = 0; 1613 1614 ifrp = ifc->ifc_req; 1615 TAILQ_FOREACH(ifp, &ifnet, if_list) { 1616 bcopy(ifp->if_xname, ifr.ifr_name, IFNAMSIZ); 1617 if ((ifa = TAILQ_FIRST(&ifp->if_addrlist)) == 0) { 1618 memset((caddr_t)&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr)); 1619 if (space >= (int)sizeof (ifr)) { 1620 error = copyout((caddr_t)&ifr, (caddr_t)ifrp, 1621 sizeof(ifr)); 1622 if (error) 1623 break; 1624 } 1625 space -= sizeof (ifr), ifrp++; 1626 } else 1627 for (; ifa != 0; ifa = TAILQ_NEXT(ifa, ifa_list)) { 1628 struct sockaddr *sa = ifa->ifa_addr; 1629 #if defined(COMPAT_43) || defined(COMPAT_LINUX) || defined(COMPAT_SVR4) || defined(COMPAT_ULTRIX) 1630 if (cmd == OSIOCGIFCONF) { 1631 struct osockaddr *osa = 1632 (struct osockaddr *)&ifr.ifr_addr; 1633 ifr.ifr_addr = *sa; 1634 osa->sa_family = sa->sa_family; 1635 if (space >= (int)sizeof (ifr)) { 1636 error = copyout((caddr_t)&ifr, 1637 (caddr_t)ifrp, 1638 sizeof (ifr)); 1639 ifrp++; 1640 } 1641 } else 1642 #endif 1643 if (sa->sa_len <= sizeof(*sa)) { 1644 ifr.ifr_addr = *sa; 1645 if (space >= (int)sizeof (ifr)) { 1646 error = copyout((caddr_t)&ifr, 1647 (caddr_t)ifrp, 1648 sizeof (ifr)); 1649 ifrp++; 1650 } 1651 } else { 1652 space -= sa->sa_len - sizeof(*sa); 1653 if (space >= (int)sizeof (ifr)) { 1654 error = copyout((caddr_t)&ifr, 1655 (caddr_t)ifrp, 1656 sizeof (ifr.ifr_name)); 1657 if (error == 0) { 1658 error = copyout((caddr_t)sa, 1659 (caddr_t)&ifrp->ifr_addr, 1660 sa->sa_len); 1661 } 1662 ifrp = (struct ifreq *) 1663 (sa->sa_len + 1664 (caddr_t)&ifrp->ifr_addr); 1665 } 1666 } 1667 if (error) 1668 break; 1669 space -= sizeof (ifr); 1670 } 1671 } 1672 ifc->ifc_len -= space; 1673 return (error); 1674 } 1675
Indexes created Fri Sep 26 08:10:20 GMT 2025