1 /* 2 * Copyright 1998 Massachusetts Institute of Technology 3 * 4 * Permission to use, copy, modify, and distribute this software and 5 * its documentation for any purpose and without fee is hereby 6 * granted, provided that both the above copyright notice and this 7 * permission notice appear in all copies, that both the above 8 * copyright notice and this permission notice appear in all 9 * supporting documentation, and that the name of M.I.T. not be used 10 * in advertising or publicity pertaining to distribution of the 11 * software without specific, written prior permission. M.I.T. makes 12 * no representations about the suitability of this software for any 13 * purpose. It is provided "as is" without express or implied 14 * warranty. 15 * 16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/net/if_vlan.c,v 1.15.2.13 2003/02/14 22:25:58 fenner Exp $ 30 * $DragonFly: src/sys/net/vlan/if_vlan.c,v 1.12 2005/01/26 00:37:40 joerg Exp $ 31 */ 32 33 /* 34 * if_vlan.c - pseudo-device driver for IEEE 802.1Q virtual LANs. 35 * Might be extended some day to also handle IEEE 802.1p priority 36 * tagging. This is sort of sneaky in the implementation, since 37 * we need to pretend to be enough of an Ethernet implementation 38 * to make arp work. The way we do this is by telling everyone 39 * that we are an Ethernet, and then catch the packets that 40 * ether_output() left on our output queue queue when it calls 41 * if_start(), rewrite them for use by the real outgoing interface, 42 * and ask it to send them. 43 * 44 * 45 * XXX It's incorrect to assume that we must always kludge up 46 * headers on the physical device's behalf: some devices support 47 * VLAN tag insertion and extraction in firmware. For these cases, 48 * one can change the behavior of the vlan interface by setting 49 * the LINK0 flag on it (that is setting the vlan interface's LINK0 50 * flag, _not_ the parent's LINK0 flag; we try to leave the parent 51 * alone). If the interface has the LINK0 flag set, then it will 52 * not modify the ethernet header on output, because the parent 53 * can do that for itself. On input, the parent can call vlan_input_tag() 54 * directly in order to supply us with an incoming mbuf and the vlan 55 * tag value that goes with it. 56 */ 57 58 #ifndef NVLAN 59 #include "use_vlan.h" 60 #endif 61 #include "opt_inet.h" 62 63 #include <sys/param.h> 64 #include <sys/kernel.h> 65 #include <sys/malloc.h> 66 #include <sys/mbuf.h> 67 #include <sys/module.h> 68 #include <sys/queue.h> 69 #include <sys/socket.h> 70 #include <sys/sockio.h> 71 #include <sys/sysctl.h> 72 #include <sys/systm.h> 73 #include <machine/bus.h> /* XXX: Shouldn't really be required! */ 74 75 #include <net/bpf.h> 76 #include <net/ethernet.h> 77 #include <net/if.h> 78 #include <net/if_arp.h> 79 #include <net/if_dl.h> 80 #include <net/if_types.h> 81 #include "if_vlan_var.h" 82 83 #ifdef INET 84 #include <netinet/in.h> 85 #include <netinet/if_ether.h> 86 #endif 87 88 #define VLANNAME "vlan" 89 90 SYSCTL_DECL(_net_link); 91 SYSCTL_NODE(_net_link, IFT_L2VLAN, vlan, CTLFLAG_RW, 0, "IEEE 802.1Q VLAN"); 92 SYSCTL_NODE(_net_link_vlan, PF_LINK, link, CTLFLAG_RW, 0, "for consistency"); 93 94 static MALLOC_DEFINE(M_VLAN, "vlan", "802.1Q Virtual LAN Interface"); 95 static LIST_HEAD(, ifvlan) ifv_list; 96 97 static int vlan_clone_create(struct if_clone *, int); 98 static void vlan_clone_destroy(struct ifnet *); 99 static void vlan_start(struct ifnet *ifp); 100 static void vlan_ifinit(void *foo); 101 static int vlan_input(struct ether_header *eh, struct mbuf *m); 102 static int vlan_input_tag(struct mbuf *m, uint16_t t); 103 static int vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t addr, 104 struct ucred *cr); 105 static int vlan_setmulti(struct ifnet *ifp); 106 static int vlan_unconfig(struct ifnet *ifp); 107 static int vlan_config(struct ifvlan *ifv, struct ifnet *p); 108 109 struct if_clone vlan_cloner = IF_CLONE_INITIALIZER("vlan", vlan_clone_create, 110 vlan_clone_destroy, NVLAN, IF_MAXUNIT); 111 112 /* 113 * Program our multicast filter. What we're actually doing is 114 * programming the multicast filter of the parent. This has the 115 * side effect of causing the parent interface to receive multicast 116 * traffic that it doesn't really want, which ends up being discarded 117 * later by the upper protocol layers. Unfortunately, there's no way 118 * to avoid this: there really is only one physical interface. 119 */ 120 static int 121 vlan_setmulti(struct ifnet *ifp) 122 { 123 struct ifnet *ifp_p; 124 struct ifmultiaddr *ifma, *rifma = NULL; 125 struct ifvlan *sc; 126 struct vlan_mc_entry *mc = NULL; 127 struct sockaddr_dl sdl; 128 int error; 129 130 /* Find the parent. */ 131 sc = ifp->if_softc; 132 ifp_p = sc->ifv_p; 133 134 /* 135 * If we don't have a parent, just remember the membership for 136 * when we do. 137 */ 138 if (ifp_p == NULL) 139 return(0); 140 141 bzero((char *)&sdl, sizeof sdl); 142 sdl.sdl_len = sizeof sdl; 143 sdl.sdl_family = AF_LINK; 144 sdl.sdl_index = ifp_p->if_index; 145 sdl.sdl_type = IFT_ETHER; 146 sdl.sdl_alen = ETHER_ADDR_LEN; 147 148 /* First, remove any existing filter entries. */ 149 while(SLIST_FIRST(&sc->vlan_mc_listhead) != NULL) { 150 mc = SLIST_FIRST(&sc->vlan_mc_listhead); 151 bcopy((char *)&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN); 152 error = if_delmulti(ifp_p, (struct sockaddr *)&sdl); 153 if (error) 154 return(error); 155 SLIST_REMOVE_HEAD(&sc->vlan_mc_listhead, mc_entries); 156 free(mc, M_VLAN); 157 } 158 159 /* Now program new ones. */ 160 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 161 if (ifma->ifma_addr->sa_family != AF_LINK) 162 continue; 163 mc = malloc(sizeof(struct vlan_mc_entry), M_VLAN, M_WAITOK); 164 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 165 (char *)&mc->mc_addr, ETHER_ADDR_LEN); 166 SLIST_INSERT_HEAD(&sc->vlan_mc_listhead, mc, mc_entries); 167 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 168 LLADDR(&sdl), ETHER_ADDR_LEN); 169 error = if_addmulti(ifp_p, (struct sockaddr *)&sdl, &rifma); 170 if (error) 171 return(error); 172 } 173 174 return(0); 175 } 176 177 static int 178 vlan_modevent(module_t mod, int type, void *data) 179 { 180 181 switch (type) { 182 case MOD_LOAD: 183 LIST_INIT(&ifv_list); 184 vlan_input_p = vlan_input; 185 vlan_input_tag_p = vlan_input_tag; 186 if_clone_attach(&vlan_cloner); 187 break; 188 case MOD_UNLOAD: 189 if_clone_detach(&vlan_cloner); 190 vlan_input_p = NULL; 191 vlan_input_tag_p = NULL; 192 while (!LIST_EMPTY(&ifv_list)) 193 vlan_clone_destroy(&LIST_FIRST(&ifv_list)->ifv_if); 194 break; 195 } 196 return 0; 197 } 198 199 static moduledata_t vlan_mod = { 200 "if_vlan", 201 vlan_modevent, 202 0 203 }; 204 205 DECLARE_MODULE(if_vlan, vlan_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 206 207 static int 208 vlan_clone_create(struct if_clone *ifc, int unit) 209 { 210 struct ifvlan *ifv; 211 struct ifnet *ifp; 212 int s; 213 214 ifv = malloc(sizeof(struct ifvlan), M_VLAN, M_WAITOK | M_ZERO); 215 ifp = &ifv->ifv_if; 216 SLIST_INIT(&ifv->vlan_mc_listhead); 217 218 s = splnet(); 219 LIST_INSERT_HEAD(&ifv_list, ifv, ifv_list); 220 splx(s); 221 222 ifp->if_softc = ifv; 223 if_initname(ifp, "vlan", unit); 224 /* NB: flags are not set here */ 225 ifp->if_linkmib = &ifv->ifv_mib; 226 ifp->if_linkmiblen = sizeof ifv->ifv_mib; 227 /* NB: mtu is not set here */ 228 229 ifp->if_init = vlan_ifinit; 230 ifp->if_start = vlan_start; 231 ifp->if_ioctl = vlan_ioctl; 232 ifp->if_snd.ifq_maxlen = ifqmaxlen; 233 ether_ifattach(ifp, ifv->ifv_ac.ac_enaddr); 234 /* Now undo some of the damage... */ 235 ifp->if_data.ifi_type = IFT_L2VLAN; 236 ifp->if_data.ifi_hdrlen = EVL_ENCAPLEN; 237 238 return (0); 239 } 240 241 static void 242 vlan_clone_destroy(struct ifnet *ifp) 243 { 244 struct ifvlan *ifv = ifp->if_softc; 245 int s; 246 247 s = splnet(); 248 LIST_REMOVE(ifv, ifv_list); 249 vlan_unconfig(ifp); 250 splx(s); 251 252 ether_ifdetach(ifp); 253 254 free(ifv, M_VLAN); 255 } 256 257 static void 258 vlan_ifinit(void *foo) 259 { 260 return; 261 } 262 263 static void 264 vlan_start(struct ifnet *ifp) 265 { 266 struct ifvlan *ifv; 267 struct ifnet *p; 268 struct ether_vlan_header *evl; 269 struct mbuf *m; 270 271 ifv = ifp->if_softc; 272 p = ifv->ifv_p; 273 274 ifp->if_flags |= IFF_OACTIVE; 275 for (;;) { 276 IF_DEQUEUE(&ifp->if_snd, m); 277 if (m == 0) 278 break; 279 BPF_MTAP(ifp, m); 280 281 /* 282 * Do not run parent's if_start() if the parent is not up, 283 * or parent's driver will cause a system crash. 284 */ 285 if ((p->if_flags & (IFF_UP | IFF_RUNNING)) != 286 (IFF_UP | IFF_RUNNING)) { 287 m_freem(m); 288 ifp->if_data.ifi_collisions++; 289 continue; 290 } 291 292 /* 293 * If the LINK0 flag is set, it means the underlying interface 294 * can do VLAN tag insertion itself and doesn't require us to 295 * create a special header for it. In this case, we just pass 296 * the packet along. However, we need some way to tell the 297 * interface where the packet came from so that it knows how 298 * to find the VLAN tag to use, so we set the rcvif in the 299 * mbuf header to our ifnet. 300 * 301 * Note: we also set the M_PROTO1 flag in the mbuf to let 302 * the parent driver know that the rcvif pointer is really 303 * valid. We need to do this because sometimes mbufs will 304 * be allocated by other parts of the system that contain 305 * garbage in the rcvif pointer. Using the M_PROTO1 flag 306 * lets the driver perform a proper sanity check and avoid 307 * following potentially bogus rcvif pointers off into 308 * never-never land. 309 */ 310 if (ifp->if_flags & IFF_LINK0) { 311 m->m_pkthdr.rcvif = ifp; 312 m->m_flags |= M_PROTO1; 313 } else { 314 M_PREPEND(m, EVL_ENCAPLEN, MB_DONTWAIT); 315 if (m == NULL) { 316 printf("%s: M_PREPEND failed", ifp->if_xname); 317 ifp->if_ierrors++; 318 continue; 319 } 320 /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 321 322 m = m_pullup(m, ETHER_HDR_LEN + EVL_ENCAPLEN); 323 if (m == NULL) { 324 printf("%s: m_pullup failed", ifp->if_xname); 325 ifp->if_ierrors++; 326 continue; 327 } 328 329 /* 330 * Transform the Ethernet header into an Ethernet header 331 * with 802.1Q encapsulation. 332 */ 333 bcopy(mtod(m, char *) + EVL_ENCAPLEN, mtod(m, char *), 334 sizeof(struct ether_header)); 335 evl = mtod(m, struct ether_vlan_header *); 336 evl->evl_proto = evl->evl_encap_proto; 337 evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 338 evl->evl_tag = htons(ifv->ifv_tag); 339 #ifdef DEBUG 340 printf("vlan_start: %*D\n", sizeof *evl, 341 (unsigned char *)evl, ":"); 342 #endif 343 } 344 345 /* 346 * Send it, precisely as ether_output() would have. 347 * We are already running at splimp. 348 */ 349 if (IF_QFULL(&p->if_snd)) { 350 IF_DROP(&p->if_snd); 351 /* XXX stats */ 352 ifp->if_oerrors++; 353 m_freem(m); 354 continue; 355 } 356 IF_ENQUEUE(&p->if_snd, m); 357 ifp->if_opackets++; 358 p->if_obytes += m->m_pkthdr.len; 359 if (m->m_flags & M_MCAST) 360 p->if_omcasts++; 361 if ((p->if_flags & IFF_OACTIVE) == 0) 362 p->if_start(p); 363 } 364 ifp->if_flags &= ~IFF_OACTIVE; 365 366 return; 367 } 368 369 static int 370 vlan_input_tag( struct mbuf *m, uint16_t t) 371 { 372 struct bpf_if *bif; 373 struct ifvlan *ifv; 374 struct ether_header *eh = mtod(m, struct ether_header *); 375 376 m_adj(m, ETHER_HDR_LEN); 377 378 /* 379 * Fake up a header and send the packet to the physical interface's 380 * bpf tap if active. 381 */ 382 if ((bif = m->m_pkthdr.rcvif->if_bpf) != NULL) { 383 struct ether_vlan_header evh; 384 385 bcopy(eh, &evh, 2*ETHER_ADDR_LEN); 386 evh.evl_encap_proto = htons(ETHERTYPE_VLAN); 387 evh.evl_tag = htons(t); 388 evh.evl_proto = eh->ether_type; 389 390 bpf_ptap(bif, m, &evh, ETHER_HDR_LEN + EVL_ENCAPLEN); 391 } 392 393 for (ifv = LIST_FIRST(&ifv_list); ifv != NULL; 394 ifv = LIST_NEXT(ifv, ifv_list)) { 395 if (m->m_pkthdr.rcvif == ifv->ifv_p 396 && ifv->ifv_tag == t) 397 break; 398 } 399 400 if (ifv == NULL || (ifv->ifv_if.if_flags & IFF_UP) == 0) { 401 m_freem(m); 402 return -1; /* So the parent can take note */ 403 } 404 405 /* 406 * Having found a valid vlan interface corresponding to 407 * the given source interface and vlan tag, run the 408 * the real packet through ether_input(). 409 */ 410 m->m_pkthdr.rcvif = &ifv->ifv_if; 411 412 ifv->ifv_if.if_ipackets++; 413 ether_input(&ifv->ifv_if, eh, m); 414 return 0; 415 } 416 417 static int 418 vlan_input(struct ether_header *eh, struct mbuf *m) 419 { 420 struct ifvlan *ifv; 421 422 for (ifv = LIST_FIRST(&ifv_list); ifv != NULL; 423 ifv = LIST_NEXT(ifv, ifv_list)) { 424 if (m->m_pkthdr.rcvif == ifv->ifv_p 425 && (EVL_VLANOFTAG(ntohs(*mtod(m, u_int16_t *))) 426 == ifv->ifv_tag)) 427 break; 428 } 429 430 if (ifv == NULL || (ifv->ifv_if.if_flags & IFF_UP) == 0) { 431 m->m_pkthdr.rcvif->if_noproto++; 432 m_freem(m); 433 return -1; /* so ether_input can take note */ 434 } 435 436 /* 437 * Having found a valid vlan interface corresponding to 438 * the given source interface and vlan tag, remove the 439 * encapsulation, and run the real packet through 440 * ether_input() a second time (it had better be 441 * reentrant!). 442 */ 443 m->m_pkthdr.rcvif = &ifv->ifv_if; 444 eh->ether_type = mtod(m, u_int16_t *)[1]; 445 m->m_data += EVL_ENCAPLEN; 446 m->m_len -= EVL_ENCAPLEN; 447 m->m_pkthdr.len -= EVL_ENCAPLEN; 448 449 ifv->ifv_if.if_ipackets++; 450 ether_input(&ifv->ifv_if, eh, m); 451 return 0; 452 } 453 454 static int 455 vlan_config(struct ifvlan *ifv, struct ifnet *p) 456 { 457 struct ifaddr *ifa1, *ifa2; 458 struct sockaddr_dl *sdl1, *sdl2; 459 460 if (p->if_data.ifi_type != IFT_ETHER) 461 return EPROTONOSUPPORT; 462 if (ifv->ifv_p) 463 return EBUSY; 464 ifv->ifv_p = p; 465 if (p->if_data.ifi_hdrlen == sizeof(struct ether_vlan_header)) 466 ifv->ifv_if.if_mtu = p->if_mtu; 467 else 468 ifv->ifv_if.if_mtu = p->if_data.ifi_mtu - EVL_ENCAPLEN; 469 470 /* 471 * Copy only a selected subset of flags from the parent. 472 * Other flags are none of our business. 473 */ 474 ifv->ifv_if.if_flags = (p->if_flags & 475 (IFF_BROADCAST | IFF_MULTICAST | IFF_SIMPLEX | IFF_POINTOPOINT)); 476 477 /* 478 * Set up our ``Ethernet address'' to reflect the underlying 479 * physical interface's. 480 */ 481 ifa1 = ifnet_addrs[ifv->ifv_if.if_index - 1]; 482 ifa2 = ifnet_addrs[p->if_index - 1]; 483 sdl1 = (struct sockaddr_dl *)ifa1->ifa_addr; 484 sdl2 = (struct sockaddr_dl *)ifa2->ifa_addr; 485 sdl1->sdl_type = IFT_ETHER; 486 sdl1->sdl_alen = ETHER_ADDR_LEN; 487 bcopy(LLADDR(sdl2), LLADDR(sdl1), ETHER_ADDR_LEN); 488 bcopy(LLADDR(sdl2), ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN); 489 490 /* 491 * Configure multicast addresses that may already be 492 * joined on the vlan device. 493 */ 494 (void)vlan_setmulti(&ifv->ifv_if); 495 496 return 0; 497 } 498 499 static int 500 vlan_unconfig(struct ifnet *ifp) 501 { 502 struct ifaddr *ifa; 503 struct sockaddr_dl *sdl; 504 struct vlan_mc_entry *mc; 505 struct ifvlan *ifv; 506 struct ifnet *p; 507 int error; 508 509 ifv = ifp->if_softc; 510 p = ifv->ifv_p; 511 512 if (p) { 513 struct sockaddr_dl sdl; 514 515 /* 516 * Since the interface is being unconfigured, we need to 517 * empty the list of multicast groups that we may have joined 518 * while we were alive from the parent's list. 519 */ 520 bzero((char *)&sdl, sizeof sdl); 521 sdl.sdl_len = sizeof sdl; 522 sdl.sdl_family = AF_LINK; 523 sdl.sdl_index = p->if_index; 524 sdl.sdl_type = IFT_ETHER; 525 sdl.sdl_alen = ETHER_ADDR_LEN; 526 527 while(SLIST_FIRST(&ifv->vlan_mc_listhead) != NULL) { 528 mc = SLIST_FIRST(&ifv->vlan_mc_listhead); 529 bcopy((char *)&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN); 530 error = if_delmulti(p, (struct sockaddr *)&sdl); 531 if (error) 532 return(error); 533 SLIST_REMOVE_HEAD(&ifv->vlan_mc_listhead, mc_entries); 534 free(mc, M_VLAN); 535 } 536 } 537 538 /* Disconnect from parent. */ 539 ifv->ifv_p = NULL; 540 ifv->ifv_if.if_mtu = ETHERMTU; 541 542 /* Clear our MAC address. */ 543 ifa = ifnet_addrs[ifv->ifv_if.if_index - 1]; 544 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 545 sdl->sdl_type = IFT_ETHER; 546 sdl->sdl_alen = ETHER_ADDR_LEN; 547 bzero(LLADDR(sdl), ETHER_ADDR_LEN); 548 bzero(ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN); 549 550 return 0; 551 } 552 553 static int 554 vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) 555 { 556 struct ifaddr *ifa; 557 struct ifnet *p; 558 struct ifreq *ifr; 559 struct ifvlan *ifv; 560 struct vlanreq vlr; 561 int error = 0; 562 563 ifr = (struct ifreq *)data; 564 ifa = (struct ifaddr *)data; 565 ifv = ifp->if_softc; 566 567 switch (cmd) { 568 case SIOCSIFADDR: 569 ifp->if_flags |= IFF_UP; 570 571 switch (ifa->ifa_addr->sa_family) { 572 #ifdef INET 573 case AF_INET: 574 arp_ifinit(&ifv->ifv_if, ifa); 575 break; 576 #endif 577 default: 578 break; 579 } 580 break; 581 582 case SIOCGIFADDR: 583 { 584 struct sockaddr *sa; 585 586 sa = (struct sockaddr *) &ifr->ifr_data; 587 bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr, 588 (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 589 } 590 break; 591 592 case SIOCGIFMEDIA: 593 if (ifv->ifv_p != NULL) { 594 error = (ifv->ifv_p->if_ioctl)(ifv->ifv_p, 595 SIOCGIFMEDIA, data, cr); 596 /* Limit the result to the parent's current config. */ 597 if (error == 0) { 598 struct ifmediareq *ifmr; 599 600 ifmr = (struct ifmediareq *) data; 601 if (ifmr->ifm_count >= 1 && ifmr->ifm_ulist) { 602 ifmr->ifm_count = 1; 603 error = copyout(&ifmr->ifm_current, 604 ifmr->ifm_ulist, 605 sizeof(int)); 606 } 607 } 608 } else 609 error = EINVAL; 610 break; 611 612 case SIOCSIFMEDIA: 613 error = EINVAL; 614 break; 615 616 case SIOCSIFMTU: 617 /* 618 * Set the interface MTU. 619 * This is bogus. The underlying interface might support 620 * jumbo frames. 621 */ 622 if (ifr->ifr_mtu > ETHERMTU) { 623 error = EINVAL; 624 } else { 625 ifp->if_mtu = ifr->ifr_mtu; 626 } 627 break; 628 629 case SIOCSETVLAN: 630 error = copyin(ifr->ifr_data, &vlr, sizeof vlr); 631 if (error) 632 break; 633 if (vlr.vlr_parent[0] == '\0') { 634 vlan_unconfig(ifp); 635 if (ifp->if_flags & IFF_UP) { 636 int s = splimp(); 637 if_down(ifp); 638 splx(s); 639 } 640 ifp->if_flags &= ~IFF_RUNNING; 641 break; 642 } 643 p = ifunit(vlr.vlr_parent); 644 if (p == 0) { 645 error = ENOENT; 646 break; 647 } 648 error = vlan_config(ifv, p); 649 if (error) 650 break; 651 ifv->ifv_tag = vlr.vlr_tag; 652 ifp->if_flags |= IFF_RUNNING; 653 break; 654 655 case SIOCGETVLAN: 656 bzero(&vlr, sizeof vlr); 657 if (ifv->ifv_p) { 658 strlcpy(vlr.vlr_parent, ifv->ifv_p->if_xname, 659 sizeof(vlr.vlr_parent)); 660 vlr.vlr_tag = ifv->ifv_tag; 661 } 662 error = copyout(&vlr, ifr->ifr_data, sizeof vlr); 663 break; 664 665 case SIOCSIFFLAGS: 666 /* 667 * We don't support promiscuous mode 668 * right now because it would require help from the 669 * underlying drivers, which hasn't been implemented. 670 */ 671 if (ifr->ifr_flags & (IFF_PROMISC)) { 672 ifp->if_flags &= ~(IFF_PROMISC); 673 error = EINVAL; 674 } 675 break; 676 case SIOCADDMULTI: 677 case SIOCDELMULTI: 678 error = vlan_setmulti(ifp); 679 break; 680 default: 681 error = EINVAL; 682 } 683 return error; 684 } 685