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 * $FreeBSD$ 30 */ 31 32 /* 33 * if_vlan.c - pseudo-device driver for IEEE 802.1Q virtual LANs. 34 * Might be extended some day to also handle IEEE 802.1p priority 35 * tagging. This is sort of sneaky in the implementation, since 36 * we need to pretend to be enough of an Ethernet implementation 37 * to make arp work. The way we do this is by telling everyone 38 * that we are an Ethernet, and then catch the packets that 39 * ether_output() left on our output queue when it calls 40 * if_start(), rewrite them for use by the real outgoing interface, 41 * and ask it to send them. 42 * 43 * 44 * XXX It's incorrect to assume that we must always kludge up 45 * headers on the physical device's behalf: some devices support 46 * VLAN tag insertion and extraction in firmware. For these cases, 47 * one can change the behavior of the vlan interface by setting 48 * the LINK0 flag on it (that is setting the vlan interface's LINK0 49 * flag, _not_ the parent's LINK0 flag; we try to leave the parent 50 * alone). If the interface has the LINK0 flag set, then it will 51 * not modify the ethernet header on output, because the parent 52 * can do that for itself. On input, the parent can call vlan_input_tag() 53 * directly in order to supply us with an incoming mbuf and the vlan 54 * tag value that goes with it. 55 */ 56 57 #include "opt_inet.h" 58 59 #include <sys/param.h> 60 #include <sys/kernel.h> 61 #include <sys/malloc.h> 62 #include <sys/mbuf.h> 63 #include <sys/module.h> 64 #include <sys/queue.h> 65 #include <sys/socket.h> 66 #include <sys/sockio.h> 67 #include <sys/sysctl.h> 68 #include <sys/systm.h> 69 #include <machine/bus.h> /* XXX: Shouldn't really be required! */ 70 #include <sys/rman.h> 71 72 #include <net/bpf.h> 73 #include <net/ethernet.h> 74 #include <net/if.h> 75 #include <net/if_arp.h> 76 #include <net/if_dl.h> 77 #include <net/if_types.h> 78 #include <net/if_vlan_var.h> 79 80 #ifdef INET 81 #include <netinet/in.h> 82 #include <netinet/if_ether.h> 83 #endif 84 85 #define VLANNAME "vlan" 86 #define VLAN_MAXUNIT 0x7fff /* ifp->if_unit is only 15 bits */ 87 88 SYSCTL_DECL(_net_link); 89 SYSCTL_NODE(_net_link, IFT_L2VLAN, vlan, CTLFLAG_RW, 0, "IEEE 802.1Q VLAN"); 90 SYSCTL_NODE(_net_link_vlan, PF_LINK, link, CTLFLAG_RW, 0, "for consistency"); 91 92 static MALLOC_DEFINE(M_VLAN, "vlan", "802.1Q Virtual LAN Interface"); 93 static struct rman vlanunits[1]; 94 static LIST_HEAD(, ifvlan) ifv_list; 95 96 static int vlan_clone_create(struct if_clone *, int *); 97 static void vlan_clone_destroy(struct ifnet *); 98 static void vlan_start(struct ifnet *ifp); 99 static void vlan_ifinit(void *foo); 100 static int vlan_input(struct ether_header *eh, struct mbuf *m); 101 static int vlan_input_tag(struct ether_header *eh, struct mbuf *m, 102 u_int16_t t); 103 static int vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t addr); 104 static int vlan_setmulti(struct ifnet *ifp); 105 static int vlan_unconfig(struct ifnet *ifp); 106 static int vlan_config(struct ifvlan *ifv, struct ifnet *p); 107 108 struct if_clone vlan_cloner = 109 IF_CLONE_INITIALIZER("vlan", vlan_clone_create, vlan_clone_destroy); 110 111 /* 112 * Program our multicast filter. What we're actually doing is 113 * programming the multicast filter of the parent. This has the 114 * side effect of causing the parent interface to receive multicast 115 * traffic that it doesn't really want, which ends up being discarded 116 * later by the upper protocol layers. Unfortunately, there's no way 117 * to avoid this: there really is only one physical interface. 118 */ 119 static int 120 vlan_setmulti(struct ifnet *ifp) 121 { 122 struct ifnet *ifp_p; 123 struct ifmultiaddr *ifma, *rifma = NULL; 124 struct ifvlan *sc; 125 struct vlan_mc_entry *mc = NULL; 126 struct sockaddr_dl sdl; 127 int error; 128 129 /* Find the parent. */ 130 sc = ifp->if_softc; 131 ifp_p = sc->ifv_p; 132 133 /* 134 * If we don't have a parent, just remember the membership for 135 * when we do. 136 */ 137 if (ifp_p == NULL) 138 return(0); 139 140 bzero((char *)&sdl, sizeof sdl); 141 sdl.sdl_len = sizeof sdl; 142 sdl.sdl_family = AF_LINK; 143 sdl.sdl_index = ifp_p->if_index; 144 sdl.sdl_type = IFT_ETHER; 145 sdl.sdl_alen = ETHER_ADDR_LEN; 146 147 /* First, remove any existing filter entries. */ 148 while(SLIST_FIRST(&sc->vlan_mc_listhead) != NULL) { 149 mc = SLIST_FIRST(&sc->vlan_mc_listhead); 150 bcopy((char *)&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN); 151 error = if_delmulti(ifp_p, (struct sockaddr *)&sdl); 152 if (error) 153 return(error); 154 SLIST_REMOVE_HEAD(&sc->vlan_mc_listhead, mc_entries); 155 free(mc, M_VLAN); 156 } 157 158 /* Now program new ones. */ 159 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 160 if (ifma->ifma_addr->sa_family != AF_LINK) 161 continue; 162 mc = malloc(sizeof(struct vlan_mc_entry), M_VLAN, M_WAITOK); 163 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 164 (char *)&mc->mc_addr, ETHER_ADDR_LEN); 165 SLIST_INSERT_HEAD(&sc->vlan_mc_listhead, mc, mc_entries); 166 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 167 LLADDR(&sdl), ETHER_ADDR_LEN); 168 error = if_addmulti(ifp_p, (struct sockaddr *)&sdl, &rifma); 169 if (error) 170 return(error); 171 } 172 173 return(0); 174 } 175 176 static int 177 vlan_modevent(module_t mod, int type, void *data) 178 { 179 int err; 180 181 switch (type) { 182 case MOD_LOAD: 183 vlanunits->rm_type = RMAN_ARRAY; 184 vlanunits->rm_descr = "configurable if_vlan units"; 185 err = rman_init(vlanunits); 186 if (err != 0) 187 return (err); 188 err = rman_manage_region(vlanunits, 0, VLAN_MAXUNIT); 189 if (err != 0) { 190 printf("%s: vlanunits: rman_manage_region: Failed %d\n", 191 VLANNAME, err); 192 rman_fini(vlanunits); 193 return (err); 194 } 195 LIST_INIT(&ifv_list); 196 vlan_input_p = vlan_input; 197 vlan_input_tag_p = vlan_input_tag; 198 if_clone_attach(&vlan_cloner); 199 break; 200 case MOD_UNLOAD: 201 if_clone_detach(&vlan_cloner); 202 vlan_input_p = NULL; 203 vlan_input_tag_p = NULL; 204 while (!LIST_EMPTY(&ifv_list)) 205 vlan_clone_destroy(&LIST_FIRST(&ifv_list)->ifv_if); 206 err = rman_fini(vlanunits); 207 if (err != 0) 208 return (err); 209 break; 210 } 211 return 0; 212 } 213 214 static moduledata_t vlan_mod = { 215 "if_vlan", 216 vlan_modevent, 217 0 218 }; 219 220 DECLARE_MODULE(if_vlan, vlan_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 221 222 static int 223 vlan_clone_create(struct if_clone *ifc, int *unit) 224 { 225 struct resource *r; 226 struct ifvlan *ifv; 227 struct ifnet *ifp; 228 int s; 229 230 if (*unit > VLAN_MAXUNIT) 231 return (ENXIO); 232 233 if (*unit < 0) { 234 r = rman_reserve_resource(vlanunits, 0, VLAN_MAXUNIT, 1, 235 RF_ALLOCATED | RF_ACTIVE, NULL); 236 if (r == NULL) 237 return (ENOSPC); 238 *unit = rman_get_start(r); 239 } else { 240 r = rman_reserve_resource(vlanunits, *unit, *unit, 1, 241 RF_ALLOCATED | RF_ACTIVE, NULL); 242 if (r == NULL) 243 return (EEXIST); 244 } 245 246 ifv = malloc(sizeof(struct ifvlan), M_VLAN, M_WAITOK); 247 memset(ifv, 0, sizeof(struct ifvlan)); 248 ifp = &ifv->ifv_if; 249 SLIST_INIT(&ifv->vlan_mc_listhead); 250 251 s = splnet(); 252 LIST_INSERT_HEAD(&ifv_list, ifv, ifv_list); 253 splx(s); 254 255 ifp->if_softc = ifv; 256 ifp->if_name = "vlan"; 257 ifp->if_unit = *unit; 258 ifv->r_unit = r; 259 /* NB: flags are not set here */ 260 ifp->if_linkmib = &ifv->ifv_mib; 261 ifp->if_linkmiblen = sizeof ifv->ifv_mib; 262 /* NB: mtu is not set here */ 263 264 ifp->if_init = vlan_ifinit; 265 ifp->if_start = vlan_start; 266 ifp->if_ioctl = vlan_ioctl; 267 ifp->if_output = ether_output; 268 ifp->if_snd.ifq_maxlen = ifqmaxlen; 269 ether_ifattach(ifp, ETHER_BPF_SUPPORTED); 270 /* Now undo some of the damage... */ 271 ifp->if_data.ifi_type = IFT_L2VLAN; 272 ifp->if_data.ifi_hdrlen = EVL_ENCAPLEN; 273 274 return (0); 275 } 276 277 static void 278 vlan_clone_destroy(struct ifnet *ifp) 279 { 280 struct ifvlan *ifv = ifp->if_softc; 281 int s; 282 int err; 283 284 s = splnet(); 285 LIST_REMOVE(ifv, ifv_list); 286 vlan_unconfig(ifp); 287 splx(s); 288 289 ether_ifdetach(ifp, ETHER_BPF_SUPPORTED); 290 291 err = rman_release_resource(ifv->r_unit); 292 KASSERT(err == 0, ("Unexpected error freeing resource")); 293 free(ifv, M_VLAN); 294 } 295 296 static void 297 vlan_ifinit(void *foo) 298 { 299 return; 300 } 301 302 static void 303 vlan_start(struct ifnet *ifp) 304 { 305 struct ifvlan *ifv; 306 struct ifnet *p; 307 struct ether_vlan_header *evl; 308 struct mbuf *m; 309 310 ifv = ifp->if_softc; 311 p = ifv->ifv_p; 312 313 ifp->if_flags |= IFF_OACTIVE; 314 for (;;) { 315 IF_DEQUEUE(&ifp->if_snd, m); 316 if (m == 0) 317 break; 318 if (ifp->if_bpf) 319 bpf_mtap(ifp, m); 320 321 /* 322 * Do not run parent's if_start() if the parent is not up, 323 * or parent's driver will cause a system crash. 324 */ 325 if ((p->if_flags & (IFF_UP | IFF_RUNNING)) != 326 (IFF_UP | IFF_RUNNING)) { 327 m_freem(m); 328 ifp->if_data.ifi_collisions++; 329 continue; 330 } 331 332 /* 333 * If the LINK0 flag is set, it means the underlying interface 334 * can do VLAN tag insertion itself and doesn't require us to 335 * create a special header for it. In this case, we just pass 336 * the packet along. However, we need some way to tell the 337 * interface where the packet came from so that it knows how 338 * to find the VLAN tag to use, so we set the rcvif in the 339 * mbuf header to our ifnet. 340 * 341 * Note: we also set the M_PROTO1 flag in the mbuf to let 342 * the parent driver know that the rcvif pointer is really 343 * valid. We need to do this because sometimes mbufs will 344 * be allocated by other parts of the system that contain 345 * garbage in the rcvif pointer. Using the M_PROTO1 flag 346 * lets the driver perform a proper sanity check and avoid 347 * following potentially bogus rcvif pointers off into 348 * never-never land. 349 */ 350 if (ifp->if_flags & IFF_LINK0) { 351 m->m_pkthdr.rcvif = ifp; 352 m->m_flags |= M_PROTO1; 353 } else { 354 M_PREPEND(m, EVL_ENCAPLEN, M_DONTWAIT); 355 if (m == NULL) { 356 printf("vlan%d: M_PREPEND failed", ifp->if_unit); 357 ifp->if_ierrors++; 358 continue; 359 } 360 /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 361 362 m = m_pullup(m, ETHER_HDR_LEN + EVL_ENCAPLEN); 363 if (m == NULL) { 364 printf("vlan%d: m_pullup failed", ifp->if_unit); 365 ifp->if_ierrors++; 366 continue; 367 } 368 369 /* 370 * Transform the Ethernet header into an Ethernet header 371 * with 802.1Q encapsulation. 372 */ 373 bcopy(mtod(m, char *) + EVL_ENCAPLEN, mtod(m, char *), 374 sizeof(struct ether_header)); 375 evl = mtod(m, struct ether_vlan_header *); 376 evl->evl_proto = evl->evl_encap_proto; 377 evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 378 evl->evl_tag = htons(ifv->ifv_tag); 379 #ifdef DEBUG 380 printf("vlan_start: %*D\n", sizeof *evl, 381 (unsigned char *)evl, ":"); 382 #endif 383 } 384 385 /* 386 * Send it, precisely as ether_output() would have. 387 * We are already running at splimp. 388 */ 389 if (IF_HANDOFF(&p->if_snd, m, p)) 390 ifp->if_opackets++; 391 else 392 ifp->if_oerrors++; 393 } 394 ifp->if_flags &= ~IFF_OACTIVE; 395 396 return; 397 } 398 399 static int 400 vlan_input_tag(struct ether_header *eh, struct mbuf *m, u_int16_t t) 401 { 402 struct ifvlan *ifv; 403 404 for (ifv = LIST_FIRST(&ifv_list); ifv != NULL; 405 ifv = LIST_NEXT(ifv, ifv_list)) { 406 if (ifv->ifv_tag == t) 407 break; 408 } 409 410 if (ifv !=NULL || (ifv->ifv_if.if_flags & IFF_UP) == 0) { 411 m_free(m); 412 return -1; /* So the parent can take note */ 413 } 414 415 /* 416 * Having found a valid vlan interface corresponding to 417 * the given source interface and vlan tag, run the 418 * the real packet through ethert_input(). 419 */ 420 m->m_pkthdr.rcvif = &ifv->ifv_if; 421 422 ifv->ifv_if.if_ipackets++; 423 ether_input(&ifv->ifv_if, eh, m); 424 return 0; 425 } 426 427 static int 428 vlan_input(struct ether_header *eh, struct mbuf *m) 429 { 430 struct ifvlan *ifv; 431 432 for (ifv = LIST_FIRST(&ifv_list); ifv != NULL; 433 ifv = LIST_NEXT(ifv, ifv_list)) { 434 if (m->m_pkthdr.rcvif == ifv->ifv_p 435 && (EVL_VLANOFTAG(ntohs(*mtod(m, u_int16_t *))) 436 == ifv->ifv_tag)) 437 break; 438 } 439 440 if (ifv != NULL || (ifv->ifv_if.if_flags & IFF_UP) == 0) { 441 m_freem(m); 442 return -1; /* so ether_input can take note */ 443 } 444 445 /* 446 * Having found a valid vlan interface corresponding to 447 * the given source interface and vlan tag, remove the 448 * encapsulation, and run the real packet through 449 * ether_input() a second time (it had better be 450 * reentrant!). 451 */ 452 m->m_pkthdr.rcvif = &ifv->ifv_if; 453 eh->ether_type = mtod(m, u_int16_t *)[1]; 454 m->m_data += EVL_ENCAPLEN; 455 m->m_len -= EVL_ENCAPLEN; 456 m->m_pkthdr.len -= EVL_ENCAPLEN; 457 458 ifv->ifv_if.if_ipackets++; 459 ether_input(&ifv->ifv_if, eh, m); 460 return 0; 461 } 462 463 static int 464 vlan_config(struct ifvlan *ifv, struct ifnet *p) 465 { 466 struct ifaddr *ifa1, *ifa2; 467 struct sockaddr_dl *sdl1, *sdl2; 468 469 if (p->if_data.ifi_type != IFT_ETHER) 470 return EPROTONOSUPPORT; 471 if (ifv->ifv_p) 472 return EBUSY; 473 ifv->ifv_p = p; 474 if (p->if_data.ifi_hdrlen == sizeof(struct ether_vlan_header)) 475 ifv->ifv_if.if_mtu = p->if_mtu; 476 else 477 ifv->ifv_if.if_mtu = p->if_data.ifi_mtu - EVL_ENCAPLEN; 478 479 /* 480 * Copy only a selected subset of flags from the parent. 481 * Other flags are none of our business. 482 */ 483 ifv->ifv_if.if_flags = (p->if_flags & 484 (IFF_BROADCAST | IFF_MULTICAST | IFF_SIMPLEX | IFF_POINTOPOINT)); 485 486 /* 487 * Set up our ``Ethernet address'' to reflect the underlying 488 * physical interface's. 489 */ 490 ifa1 = ifaddr_byindex(ifv->ifv_if.if_index); 491 ifa2 = ifaddr_byindex(p->if_index); 492 sdl1 = (struct sockaddr_dl *)ifa1->ifa_addr; 493 sdl2 = (struct sockaddr_dl *)ifa2->ifa_addr; 494 sdl1->sdl_type = IFT_ETHER; 495 sdl1->sdl_alen = ETHER_ADDR_LEN; 496 bcopy(LLADDR(sdl2), LLADDR(sdl1), ETHER_ADDR_LEN); 497 bcopy(LLADDR(sdl2), ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN); 498 499 /* 500 * Configure multicast addresses that may already be 501 * joined on the vlan device. 502 */ 503 (void)vlan_setmulti(&ifv->ifv_if); 504 505 return 0; 506 } 507 508 static int 509 vlan_unconfig(struct ifnet *ifp) 510 { 511 struct ifaddr *ifa; 512 struct sockaddr_dl *sdl; 513 struct vlan_mc_entry *mc; 514 struct ifvlan *ifv; 515 struct ifnet *p; 516 int error; 517 518 ifv = ifp->if_softc; 519 p = ifv->ifv_p; 520 521 if (p) { 522 struct sockaddr_dl sdl; 523 524 /* 525 * Since the interface is being unconfigured, we need to 526 * empty the list of multicast groups that we may have joined 527 * while we were alive from the parent's list. 528 */ 529 bzero((char *)&sdl, sizeof sdl); 530 sdl.sdl_len = sizeof sdl; 531 sdl.sdl_family = AF_LINK; 532 sdl.sdl_index = p->if_index; 533 sdl.sdl_type = IFT_ETHER; 534 sdl.sdl_alen = ETHER_ADDR_LEN; 535 536 while(SLIST_FIRST(&ifv->vlan_mc_listhead) != NULL) { 537 mc = SLIST_FIRST(&ifv->vlan_mc_listhead); 538 bcopy((char *)&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN); 539 error = if_delmulti(p, (struct sockaddr *)&sdl); 540 if (error) 541 return(error); 542 SLIST_REMOVE_HEAD(&ifv->vlan_mc_listhead, mc_entries); 543 free(mc, M_VLAN); 544 } 545 } 546 547 /* Disconnect from parent. */ 548 ifv->ifv_p = NULL; 549 ifv->ifv_if.if_mtu = ETHERMTU; 550 551 /* Clear our MAC address. */ 552 ifa = ifaddr_byindex(ifv->ifv_if.if_index); 553 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 554 sdl->sdl_type = IFT_ETHER; 555 sdl->sdl_alen = ETHER_ADDR_LEN; 556 bzero(LLADDR(sdl), ETHER_ADDR_LEN); 557 bzero(ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN); 558 559 return 0; 560 } 561 562 static int 563 vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 564 { 565 struct ifaddr *ifa; 566 struct ifnet *p; 567 struct ifreq *ifr; 568 struct ifvlan *ifv; 569 struct vlanreq vlr; 570 int error = 0; 571 572 ifr = (struct ifreq *)data; 573 ifa = (struct ifaddr *)data; 574 ifv = ifp->if_softc; 575 576 switch (cmd) { 577 case SIOCSIFADDR: 578 ifp->if_flags |= IFF_UP; 579 580 switch (ifa->ifa_addr->sa_family) { 581 #ifdef INET 582 case AF_INET: 583 arp_ifinit(&ifv->ifv_ac, ifa); 584 break; 585 #endif 586 default: 587 break; 588 } 589 break; 590 591 case SIOCGIFADDR: 592 { 593 struct sockaddr *sa; 594 595 sa = (struct sockaddr *) &ifr->ifr_data; 596 bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr, 597 (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 598 } 599 break; 600 601 case SIOCSIFMTU: 602 /* 603 * Set the interface MTU. 604 * This is bogus. The underlying interface might support 605 * jumbo frames. 606 */ 607 if (ifr->ifr_mtu > ETHERMTU) { 608 error = EINVAL; 609 } else { 610 ifp->if_mtu = ifr->ifr_mtu; 611 } 612 break; 613 614 case SIOCSETVLAN: 615 error = copyin(ifr->ifr_data, &vlr, sizeof vlr); 616 if (error) 617 break; 618 if (vlr.vlr_parent[0] == '\0') { 619 vlan_unconfig(ifp); 620 if (ifp->if_flags & IFF_UP) { 621 int s = splimp(); 622 if_down(ifp); 623 splx(s); 624 } 625 ifp->if_flags &= ~IFF_RUNNING; 626 break; 627 } 628 p = ifunit(vlr.vlr_parent); 629 if (p == 0) { 630 error = ENOENT; 631 break; 632 } 633 error = vlan_config(ifv, p); 634 if (error) 635 break; 636 ifv->ifv_tag = vlr.vlr_tag; 637 ifp->if_flags |= IFF_RUNNING; 638 break; 639 640 case SIOCGETVLAN: 641 bzero(&vlr, sizeof vlr); 642 if (ifv->ifv_p) { 643 snprintf(vlr.vlr_parent, sizeof(vlr.vlr_parent), 644 "%s%d", ifv->ifv_p->if_name, ifv->ifv_p->if_unit); 645 vlr.vlr_tag = ifv->ifv_tag; 646 } 647 error = copyout(&vlr, ifr->ifr_data, sizeof vlr); 648 break; 649 650 case SIOCSIFFLAGS: 651 /* 652 * We don't support promiscuous mode 653 * right now because it would require help from the 654 * underlying drivers, which hasn't been implemented. 655 */ 656 if (ifr->ifr_flags & (IFF_PROMISC)) { 657 ifp->if_flags &= ~(IFF_PROMISC); 658 error = EINVAL; 659 } 660 break; 661 case SIOCADDMULTI: 662 case SIOCDELMULTI: 663 error = vlan_setmulti(ifp); 664 break; 665 default: 666 error = EINVAL; 667 } 668 return error; 669 } 670