Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/net/if_vlan.c
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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 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 #ifndef NVLAN 58 #include "vlan.h" 59 #endif 60 #include "opt_inet.h" 61 62 #include <sys/param.h> 63 #include <sys/kernel.h> 64 #include <sys/malloc.h> 65 #include <sys/mbuf.h> 66 #include <sys/module.h> 67 #include <sys/queue.h> 68 #include <sys/socket.h> 69 #include <sys/sockio.h> 70 #include <sys/sysctl.h> 71 #include <sys/systm.h> 72 #include <machine/bus.h> /* XXX: Shouldn't really be required! */ 73 #include <sys/rman.h> 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 <net/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 #define VLAN_MAXUNIT 0x7fff /* ifp->if_unit is only 15 bits */ 90 91 SYSCTL_DECL(_net_link); 92 SYSCTL_NODE(_net_link, IFT_L2VLAN, vlan, CTLFLAG_RW, 0, "IEEE 802.1Q VLAN"); 93 SYSCTL_NODE(_net_link_vlan, PF_LINK, link, CTLFLAG_RW, 0, "for consistency"); 94 95 static MALLOC_DEFINE(M_VLAN, "vlan", "802.1Q Virtual LAN Interface"); 96 static struct rman vlanunits[1]; 97 static LIST_HEAD(, ifvlan) ifv_list; 98 99 static int vlan_clone_create(struct if_clone *, int *); 100 static void vlan_clone_destroy(struct ifnet *); 101 static void vlan_start(struct ifnet *ifp); 102 static void vlan_ifinit(void *foo); 103 static int vlan_input(struct ether_header *eh, struct mbuf *m); 104 static int vlan_input_tag(struct ether_header *eh, struct mbuf *m, 105 u_int16_t t); 106 static int vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t addr); 107 static int vlan_setmulti(struct ifnet *ifp); 108 static int vlan_unconfig(struct ifnet *ifp); 109 static int vlan_config(struct ifvlan *ifv, struct ifnet *p); 110 111 struct if_clone vlan_cloner = 112 IF_CLONE_INITIALIZER("vlan", vlan_clone_create, vlan_clone_destroy); 113 114 /* 115 * Program our multicast filter. What we're actually doing is 116 * programming the multicast filter of the parent. This has the 117 * side effect of causing the parent interface to receive multicast 118 * traffic that it doesn't really want, which ends up being discarded 119 * later by the upper protocol layers. Unfortunately, there's no way 120 * to avoid this: there really is only one physical interface. 121 */ 122 static int 123 vlan_setmulti(struct ifnet *ifp) 124 { 125 struct ifnet *ifp_p; 126 struct ifmultiaddr *ifma, *rifma = NULL; 127 struct ifvlan *sc; 128 struct vlan_mc_entry *mc = NULL; 129 struct sockaddr_dl sdl; 130 int error; 131 132 /* Find the parent. */ 133 sc = ifp->if_softc; 134 ifp_p = sc->ifv_p; 135 136 /* 137 * If we don't have a parent, just remember the membership for 138 * when we do. 139 */ 140 if (ifp_p == NULL) 141 return(0); 142 143 bzero((char *)&sdl, sizeof sdl); 144 sdl.sdl_len = sizeof sdl; 145 sdl.sdl_family = AF_LINK; 146 sdl.sdl_index = ifp_p->if_index; 147 sdl.sdl_type = IFT_ETHER; 148 sdl.sdl_alen = ETHER_ADDR_LEN; 149 150 /* First, remove any existing filter entries. */ 151 while(SLIST_FIRST(&sc->vlan_mc_listhead) != NULL) { 152 mc = SLIST_FIRST(&sc->vlan_mc_listhead); 153 bcopy((char *)&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN); 154 error = if_delmulti(ifp_p, (struct sockaddr *)&sdl); 155 if (error) 156 return(error); 157 SLIST_REMOVE_HEAD(&sc->vlan_mc_listhead, mc_entries); 158 free(mc, M_VLAN); 159 } 160 161 /* Now program new ones. */ 162 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 163 if (ifma->ifma_addr->sa_family != AF_LINK) 164 continue; 165 mc = malloc(sizeof(struct vlan_mc_entry), M_VLAN, M_WAITOK); 166 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 167 (char *)&mc->mc_addr, ETHER_ADDR_LEN); 168 SLIST_INSERT_HEAD(&sc->vlan_mc_listhead, mc, mc_entries); 169 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 170 LLADDR(&sdl), ETHER_ADDR_LEN); 171 error = if_addmulti(ifp_p, (struct sockaddr *)&sdl, &rifma); 172 if (error) 173 return(error); 174 } 175 176 return(0); 177 } 178 179 static int 180 vlan_modevent(module_t mod, int type, void *data) 181 { 182 int i; 183 int err; 184 185 switch (type) { 186 case MOD_LOAD: 187 vlanunits->rm_type = RMAN_ARRAY; 188 vlanunits->rm_descr = "configurable if_vlan units"; 189 err = rman_init(vlanunits); 190 if (err != 0) 191 return (err); 192 err = rman_manage_region(vlanunits, 0, VLAN_MAXUNIT); 193 if (err != 0) { 194 printf("%s: vlanunits: rman_manage_region: Failed %d\n", 195 VLANNAME, err); 196 rman_fini(vlanunits); 197 return (err); 198 } 199 LIST_INIT(&ifv_list); 200 vlan_input_p = vlan_input; 201 vlan_input_tag_p = vlan_input_tag; 202 if_clone_attach(&vlan_cloner); 203 for(i = 0; i < NVLAN; i ++) { 204 err = vlan_clone_create(&vlan_cloner, &i); 205 KASSERT(err == 0, 206 ("Unexpected error creating initial VLANs")); 207 } 208 break; 209 case MOD_UNLOAD: 210 if_clone_detach(&vlan_cloner); 211 vlan_input_p = NULL; 212 vlan_input_tag_p = NULL; 213 while (!LIST_EMPTY(&ifv_list)) 214 vlan_clone_destroy(&LIST_FIRST(&ifv_list)->ifv_if); 215 err = rman_fini(vlanunits); 216 if (err != 0) 217 return (err); 218 break; 219 } 220 return 0; 221 } 222 223 static moduledata_t vlan_mod = { 224 "if_vlan", 225 vlan_modevent, 226 0 227 }; 228 229 DECLARE_MODULE(if_vlan, vlan_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 230 231 static int 232 vlan_clone_create(struct if_clone *ifc, int *unit) 233 { 234 struct resource *r; 235 struct ifvlan *ifv; 236 struct ifnet *ifp; 237 int s; 238 239 if (*unit > VLAN_MAXUNIT) 240 return (ENXIO); 241 242 if (*unit < 0) { 243 r = rman_reserve_resource(vlanunits, 0, VLAN_MAXUNIT, 1, 244 RF_ALLOCATED | RF_ACTIVE, NULL); 245 if (r == NULL) 246 return (ENOSPC); 247 *unit = rman_get_start(r); 248 } else { 249 r = rman_reserve_resource(vlanunits, *unit, *unit, 1, 250 RF_ALLOCATED | RF_ACTIVE, NULL); 251 if (r == NULL) 252 return (EEXIST); 253 } 254 255 ifv = malloc(sizeof(struct ifvlan), M_VLAN, M_WAITOK); 256 memset(ifv, 0, sizeof(struct ifvlan)); 257 ifp = &ifv->ifv_if; 258 SLIST_INIT(&ifv->vlan_mc_listhead); 259 260 s = splnet(); 261 LIST_INSERT_HEAD(&ifv_list, ifv, ifv_list); 262 splx(s); 263 264 ifp->if_softc = ifv; 265 ifp->if_name = "vlan"; 266 ifp->if_unit = *unit; 267 ifv->r_unit = r; 268 /* NB: flags are not set here */ 269 ifp->if_linkmib = &ifv->ifv_mib; 270 ifp->if_linkmiblen = sizeof ifv->ifv_mib; 271 /* NB: mtu is not set here */ 272 273 ifp->if_init = vlan_ifinit; 274 ifp->if_start = vlan_start; 275 ifp->if_ioctl = vlan_ioctl; 276 ifp->if_output = ether_output; 277 ifp->if_snd.ifq_maxlen = ifqmaxlen; 278 ether_ifattach(ifp, ETHER_BPF_SUPPORTED); 279 /* Now undo some of the damage... */ 280 ifp->if_data.ifi_type = IFT_L2VLAN; 281 ifp->if_data.ifi_hdrlen = EVL_ENCAPLEN; 282 283 return (0); 284 } 285 286 static void 287 vlan_clone_destroy(struct ifnet *ifp) 288 { 289 struct ifvlan *ifv = ifp->if_softc; 290 int s; 291 int err; 292 293 s = splnet(); 294 LIST_REMOVE(ifv, ifv_list); 295 vlan_unconfig(ifp); 296 splx(s); 297 298 ether_ifdetach(ifp, ETHER_BPF_SUPPORTED); 299 300 err = rman_release_resource(ifv->r_unit); 301 KASSERT(err == 0, ("Unexpected error freeing resource")); 302 free(ifv, M_VLAN); 303 } 304 305 static void 306 vlan_ifinit(void *foo) 307 { 308 return; 309 } 310 311 static void 312 vlan_start(struct ifnet *ifp) 313 { 314 struct ifvlan *ifv; 315 struct ifnet *p; 316 struct ether_vlan_header *evl; 317 struct mbuf *m; 318 319 ifv = ifp->if_softc; 320 p = ifv->ifv_p; 321 322 ifp->if_flags |= IFF_OACTIVE; 323 for (;;) { 324 IF_DEQUEUE(&ifp->if_snd, m); 325 if (m == 0) 326 break; 327 if (ifp->if_bpf) 328 bpf_mtap(ifp, m); 329 330 /* 331 * Do not run parent's if_start() if the parent is not up, 332 * or parent's driver will cause a system crash. 333 */ 334 if ((p->if_flags & (IFF_UP | IFF_RUNNING)) != 335 (IFF_UP | IFF_RUNNING)) { 336 m_freem(m); 337 ifp->if_data.ifi_collisions++; 338 continue; 339 } 340 341 /* 342 * If the LINK0 flag is set, it means the underlying interface 343 * can do VLAN tag insertion itself and doesn't require us to 344 * create a special header for it. In this case, we just pass 345 * the packet along. However, we need some way to tell the 346 * interface where the packet came from so that it knows how 347 * to find the VLAN tag to use, so we set the rcvif in the 348 * mbuf header to our ifnet. 349 * 350 * Note: we also set the M_PROTO1 flag in the mbuf to let 351 * the parent driver know that the rcvif pointer is really 352 * valid. We need to do this because sometimes mbufs will 353 * be allocated by other parts of the system that contain 354 * garbage in the rcvif pointer. Using the M_PROTO1 flag 355 * lets the driver perform a proper sanity check and avoid 356 * following potentially bogus rcvif pointers off into 357 * never-never land. 358 */ 359 if (ifp->if_flags & IFF_LINK0) { 360 m->m_pkthdr.rcvif = ifp; 361 m->m_flags |= M_PROTO1; 362 } else { 363 M_PREPEND(m, EVL_ENCAPLEN, M_DONTWAIT); 364 if (m == NULL) { 365 printf("vlan%d: M_PREPEND failed", ifp->if_unit); 366 ifp->if_ierrors++; 367 continue; 368 } 369 /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 370 371 m = m_pullup(m, ETHER_HDR_LEN + EVL_ENCAPLEN); 372 if (m == NULL) { 373 printf("vlan%d: m_pullup failed", ifp->if_unit); 374 ifp->if_ierrors++; 375 continue; 376 } 377 378 /* 379 * Transform the Ethernet header into an Ethernet header 380 * with 802.1Q encapsulation. 381 */ 382 bcopy(mtod(m, char *) + EVL_ENCAPLEN, mtod(m, char *), 383 sizeof(struct ether_header)); 384 evl = mtod(m, struct ether_vlan_header *); 385 evl->evl_proto = evl->evl_encap_proto; 386 evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 387 evl->evl_tag = htons(ifv->ifv_tag); 388 #ifdef DEBUG 389 printf("vlan_start: %*D\n", sizeof *evl, 390 (char *)evl, ":"); 391 #endif 392 } 393 394 /* 395 * Send it, precisely as ether_output() would have. 396 * We are already running at splimp. 397 */ 398 if (IF_QFULL(&p->if_snd)) { 399 IF_DROP(&p->if_snd); 400 /* XXX stats */ 401 ifp->if_oerrors++; 402 m_freem(m); 403 continue; 404 } 405 IF_ENQUEUE(&p->if_snd, m); 406 ifp->if_opackets++; 407 p->if_obytes += m->m_pkthdr.len; 408 if (m->m_flags & M_MCAST) 409 p->if_omcasts++; 410 if ((p->if_flags & IFF_OACTIVE) == 0) 411 p->if_start(p); 412 } 413 ifp->if_flags &= ~IFF_OACTIVE; 414 415 return; 416 } 417 418 static int 419 vlan_input_tag(struct ether_header *eh, struct mbuf *m, u_int16_t t) 420 { 421 struct ifvlan *ifv; 422 423 /* 424 * Fake up a header and send the packet to the physical interface's 425 * bpf tap if active. 426 */ 427 if (m->m_pkthdr.rcvif->if_bpf != NULL) { 428 struct m_hdr mh; 429 struct ether_vlan_header evh; 430 431 bcopy(eh, &evh, 2*ETHER_ADDR_LEN); 432 evh.evl_encap_proto = htons(ETHERTYPE_VLAN); 433 evh.evl_tag = htons(t); 434 evh.evl_proto = eh->ether_type; 435 436 /* This kludge is OK; BPF treats the "mbuf" as read-only */ 437 mh.mh_next = m; 438 mh.mh_data = (char *)&evh; 439 mh.mh_len = ETHER_HDR_LEN + EVL_ENCAPLEN; 440 bpf_mtap(m->m_pkthdr.rcvif, (struct mbuf *)&mh); 441 } 442 443 for (ifv = LIST_FIRST(&ifv_list); ifv != NULL; 444 ifv = LIST_NEXT(ifv, ifv_list)) { 445 if (m->m_pkthdr.rcvif == ifv->ifv_p 446 && ifv->ifv_tag == EVL_VLANOFTAG(t)) 447 break; 448 } 449 450 if (ifv == NULL || (ifv->ifv_if.if_flags & IFF_UP) == 0) { 451 m_freem(m); 452 return -1; /* So the parent can take note */ 453 } 454 455 /* 456 * Having found a valid vlan interface corresponding to 457 * the given source interface and vlan tag, run the 458 * the real packet through ether_input(). 459 */ 460 m->m_pkthdr.rcvif = &ifv->ifv_if; 461 462 ifv->ifv_if.if_ipackets++; 463 ether_input(&ifv->ifv_if, eh, m); 464 return 0; 465 } 466 467 static int 468 vlan_input(struct ether_header *eh, struct mbuf *m) 469 { 470 struct ifvlan *ifv; 471 472 for (ifv = LIST_FIRST(&ifv_list); ifv != NULL; 473 ifv = LIST_NEXT(ifv, ifv_list)) { 474 if (m->m_pkthdr.rcvif == ifv->ifv_p 475 && (EVL_VLANOFTAG(ntohs(*mtod(m, u_int16_t *))) 476 == ifv->ifv_tag)) 477 break; 478 } 479 480 if (ifv == NULL || (ifv->ifv_if.if_flags & IFF_UP) == 0) { 481 m->m_pkthdr.rcvif->if_noproto++; 482 m_freem(m); 483 return -1; /* so ether_input can take note */ 484 } 485 486 /* 487 * Having found a valid vlan interface corresponding to 488 * the given source interface and vlan tag, remove the 489 * encapsulation, and run the real packet through 490 * ether_input() a second time (it had better be 491 * reentrant!). 492 */ 493 m->m_pkthdr.rcvif = &ifv->ifv_if; 494 eh->ether_type = mtod(m, u_int16_t *)[1]; 495 m->m_data += EVL_ENCAPLEN; 496 m->m_len -= EVL_ENCAPLEN; 497 m->m_pkthdr.len -= EVL_ENCAPLEN; 498 499 ifv->ifv_if.if_ipackets++; 500 ether_input(&ifv->ifv_if, eh, m); 501 return 0; 502 } 503 504 static int 505 vlan_config(struct ifvlan *ifv, struct ifnet *p) 506 { 507 struct ifaddr *ifa1, *ifa2; 508 struct sockaddr_dl *sdl1, *sdl2; 509 510 if (p->if_data.ifi_type != IFT_ETHER) 511 return EPROTONOSUPPORT; 512 if (ifv->ifv_p) 513 return EBUSY; 514 ifv->ifv_p = p; 515 if (p->if_data.ifi_hdrlen == sizeof(struct ether_vlan_header)) 516 ifv->ifv_if.if_mtu = p->if_mtu; 517 else 518 ifv->ifv_if.if_mtu = p->if_data.ifi_mtu - EVL_ENCAPLEN; 519 520 /* 521 * Copy only a selected subset of flags from the parent. 522 * Other flags are none of our business. 523 */ 524 ifv->ifv_if.if_flags = (p->if_flags & 525 (IFF_BROADCAST | IFF_MULTICAST | IFF_SIMPLEX | IFF_POINTOPOINT)); 526 527 /* 528 * Set up our ``Ethernet address'' to reflect the underlying 529 * physical interface's. 530 */ 531 ifa1 = ifnet_addrs[ifv->ifv_if.if_index - 1]; 532 ifa2 = ifnet_addrs[p->if_index - 1]; 533 sdl1 = (struct sockaddr_dl *)ifa1->ifa_addr; 534 sdl2 = (struct sockaddr_dl *)ifa2->ifa_addr; 535 sdl1->sdl_type = IFT_ETHER; 536 sdl1->sdl_alen = ETHER_ADDR_LEN; 537 bcopy(LLADDR(sdl2), LLADDR(sdl1), ETHER_ADDR_LEN); 538 bcopy(LLADDR(sdl2), ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN); 539 540 /* 541 * Configure multicast addresses that may already be 542 * joined on the vlan device. 543 */ 544 (void)vlan_setmulti(&ifv->ifv_if); 545 546 return 0; 547 } 548 549 static int 550 vlan_unconfig(struct ifnet *ifp) 551 { 552 struct ifaddr *ifa; 553 struct sockaddr_dl *sdl; 554 struct vlan_mc_entry *mc; 555 struct ifvlan *ifv; 556 struct ifnet *p; 557 int error; 558 559 ifv = ifp->if_softc; 560 p = ifv->ifv_p; 561 562 if (p) { 563 struct sockaddr_dl sdl; 564 565 /* 566 * Since the interface is being unconfigured, we need to 567 * empty the list of multicast groups that we may have joined 568 * while we were alive from the parent's list. 569 */ 570 bzero((char *)&sdl, sizeof sdl); 571 sdl.sdl_len = sizeof sdl; 572 sdl.sdl_family = AF_LINK; 573 sdl.sdl_index = p->if_index; 574 sdl.sdl_type = IFT_ETHER; 575 sdl.sdl_alen = ETHER_ADDR_LEN; 576 577 while(SLIST_FIRST(&ifv->vlan_mc_listhead) != NULL) { 578 mc = SLIST_FIRST(&ifv->vlan_mc_listhead); 579 bcopy((char *)&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN); 580 error = if_delmulti(p, (struct sockaddr *)&sdl); 581 if (error) 582 return(error); 583 SLIST_REMOVE_HEAD(&ifv->vlan_mc_listhead, mc_entries); 584 free(mc, M_VLAN); 585 } 586 } 587 588 /* Disconnect from parent. */ 589 ifv->ifv_p = NULL; 590 ifv->ifv_if.if_mtu = ETHERMTU; 591 592 /* Clear our MAC address. */ 593 ifa = ifnet_addrs[ifv->ifv_if.if_index - 1]; 594 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 595 sdl->sdl_type = IFT_ETHER; 596 sdl->sdl_alen = ETHER_ADDR_LEN; 597 bzero(LLADDR(sdl), ETHER_ADDR_LEN); 598 bzero(ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN); 599 600 return 0; 601 } 602 603 static int 604 vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 605 { 606 struct ifaddr *ifa; 607 struct ifnet *p; 608 struct ifreq *ifr; 609 struct ifvlan *ifv; 610 struct vlanreq vlr; 611 int error = 0; 612 613 ifr = (struct ifreq *)data; 614 ifa = (struct ifaddr *)data; 615 ifv = ifp->if_softc; 616 617 switch (cmd) { 618 case SIOCSIFADDR: 619 ifp->if_flags |= IFF_UP; 620 621 switch (ifa->ifa_addr->sa_family) { 622 #ifdef INET 623 case AF_INET: 624 arp_ifinit(&ifv->ifv_if, ifa); 625 break; 626 #endif 627 default: 628 break; 629 } 630 break; 631 632 case SIOCGIFADDR: 633 { 634 struct sockaddr *sa; 635 636 sa = (struct sockaddr *) &ifr->ifr_data; 637 bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr, 638 (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 639 } 640 break; 641 642 case SIOCGIFMEDIA: 643 if (ifv->ifv_p != NULL) { 644 error = (ifv->ifv_p->if_ioctl)(ifv->ifv_p, SIOCGIFMEDIA, data); 645 /* Limit the result to the parent's current config. */ 646 if (error == 0) { 647 struct ifmediareq *ifmr; 648 649 ifmr = (struct ifmediareq *) data; 650 if (ifmr->ifm_count >= 1 && ifmr->ifm_ulist) { 651 ifmr->ifm_count = 1; 652 error = copyout(&ifmr->ifm_current, 653 ifmr->ifm_ulist, 654 sizeof(int)); 655 } 656 } 657 } else 658 error = EINVAL; 659 break; 660 661 case SIOCSIFMEDIA: 662 error = EINVAL; 663 break; 664 665 case SIOCSIFMTU: 666 /* 667 * Set the interface MTU. 668 * This is bogus. The underlying interface might support 669 * jumbo frames. 670 */ 671 if (ifr->ifr_mtu > ETHERMTU) { 672 error = EINVAL; 673 } else { 674 ifp->if_mtu = ifr->ifr_mtu; 675 } 676 break; 677 678 case SIOCSETVLAN: 679 error = copyin(ifr->ifr_data, &vlr, sizeof vlr); 680 if (error) 681 break; 682 if (vlr.vlr_tag & ~EVL_VLID_MASK) { 683 error = EINVAL; 684 break; 685 } 686 if (vlr.vlr_parent[0] == '\0') { 687 vlan_unconfig(ifp); 688 if (ifp->if_flags & IFF_UP) { 689 int s = splimp(); 690 if_down(ifp); 691 splx(s); 692 } 693 ifp->if_flags &= ~IFF_RUNNING; 694 break; 695 } 696 p = ifunit(vlr.vlr_parent); 697 if (p == 0) { 698 error = ENOENT; 699 break; 700 } 701 error = vlan_config(ifv, p); 702 if (error) 703 break; 704 ifv->ifv_tag = vlr.vlr_tag; 705 ifp->if_flags |= IFF_RUNNING; 706 break; 707 708 case SIOCGETVLAN: 709 bzero(&vlr, sizeof vlr); 710 if (ifv->ifv_p) { 711 snprintf(vlr.vlr_parent, sizeof(vlr.vlr_parent), 712 "%s%d", ifv->ifv_p->if_name, ifv->ifv_p->if_unit); 713 vlr.vlr_tag = ifv->ifv_tag; 714 } 715 error = copyout(&vlr, ifr->ifr_data, sizeof vlr); 716 break; 717 718 case SIOCSIFFLAGS: 719 /* 720 * We don't support promiscuous mode 721 * right now because it would require help from the 722 * underlying drivers, which hasn't been implemented. 723 */ 724 if (ifr->ifr_flags & (IFF_PROMISC)) { 725 ifp->if_flags &= ~(IFF_PROMISC); 726 error = EINVAL; 727 } 728 break; 729 case SIOCADDMULTI: 730 case SIOCDELMULTI: 731 error = vlan_setmulti(ifp); 732 break; 733 default: 734 error = EINVAL; 735 } 736 return error; 737 }
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