bsd/net/ether_if_module.c

   1 /*
   2  * Copyright (c) 2000-2013 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 1982, 1989, 1993
  30  *      The Regents of the University of California.  All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. All advertising materials mentioning features or use of this software
  41  *    must display the following acknowledgement:
  42  *      This product includes software developed by the University of
  43  *      California, Berkeley and its contributors.
  44  * 4. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  *
  60  */
  61
  62 #include <sys/param.h>
  63 #include <sys/systm.h>
  64 #include <sys/kernel.h>
  65 #include <sys/malloc.h>
  66 #include <sys/mbuf.h>
  67 #include <sys/socket.h>
  68 #include <sys/sockio.h>
  69 #include <sys/sysctl.h>
  70
  71 #include <pexpert/pexpert.h>
  72
  73 #define etherbroadcastaddr      fugly
  74 #include <net/if.h>
  75 #include <net/route.h>
  76 #include <net/if_llc.h>
  77 #include <net/if_dl.h>
  78 #include <net/if_types.h>
  79 #include <net/if_ether.h>
  80 #include <net/if_gif.h>
  81 #include <netinet/if_ether.h>
  82 #include <netinet/in.h> /* For M_LOOP */
  83 #include <net/kpi_interface.h>
  84 #include <net/kpi_protocol.h>
  85 #undef etherbroadcastaddr
  86
  87 /*
  88 #if INET
  89 #include <netinet/in.h>
  90 #include <netinet/in_var.h>
  91
  92 #include <netinet/in_systm.h>
  93 #include <netinet/ip.h>
  94 #endif
  95 */
  96 #include <net/ether_if_module.h>
  97 #include <sys/socketvar.h>
  98 #include <net/if_vlan_var.h>
  99 #if BOND
 100 #include <net/if_bond_internal.h>
 101 #endif /* BOND */
 102 #if IF_BRIDGE
 103 #include <net/if_bridgevar.h>
 104 #endif /* IF_BRIDGE */
 105
 106 #include <net/dlil.h>
 107
 108 #define memcpy(x,y,z)   bcopy(y, x, z)
 109
 110 SYSCTL_DECL(_net_link);
 111 SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW|CTLFLAG_LOCKED, 0,
 112     "Ethernet");
 113
 114 struct en_desc {
 115         u_int16_t type;                 /* Type of protocol stored in data */
 116         u_int32_t protocol_family;      /* Protocol family */
 117         u_int32_t data[2];              /* Protocol data */
 118 };
 119
 120 /* descriptors are allocated in blocks of ETHER_DESC_BLK_SIZE */
 121 #define ETHER_DESC_BLK_SIZE (10)
 122
 123 /*
 124  * Header for the demux list, hangs off of IFP at if_family_cookie
 125  */
 126 struct ether_desc_blk_str {
 127         u_int32_t  n_max_used;
 128         u_int32_t       n_count;
 129         u_int32_t       n_used;
 130         struct en_desc  block_ptr[1];
 131 };
 132
 133 /* Size of the above struct before the array of struct en_desc */
 134 #define ETHER_DESC_HEADER_SIZE  \
 135         ((size_t) offsetof(struct ether_desc_blk_str, block_ptr))
 136
 137 __private_extern__ u_char etherbroadcastaddr[ETHER_ADDR_LEN] =
 138     { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 139
 140 /*
 141  * Release all descriptor entries owned by this protocol (there may be several).
 142  * Setting the type to 0 releases the entry. Eventually we should compact-out
 143  * the unused entries.
 144  */
 145 int
 146 ether_del_proto(ifnet_t ifp, protocol_family_t protocol_family)
 147 {
 148         struct ether_desc_blk_str *desc_blk =
 149             (struct ether_desc_blk_str *)ifp->if_family_cookie;
 150         u_int32_t current = 0;
 151         int found = 0;
 152
 153         if (desc_blk == NULL)
 154                 return (0);
 155
 156         for (current = desc_blk->n_max_used; current > 0; current--) {
 157                 if (desc_blk->block_ptr[current - 1].protocol_family ==
 158                     protocol_family) {
 159                         found = 1;
 160                         desc_blk->block_ptr[current - 1].type = 0;
 161                         desc_blk->n_used--;
 162                 }
 163         }
 164
 165         if (desc_blk->n_used == 0) {
 166                 FREE(ifp->if_family_cookie, M_IFADDR);
 167                 ifp->if_family_cookie = 0;
 168         } else {
 169                 /* Decrement n_max_used */
 170                 for (; desc_blk->n_max_used > 0 &&
 171                     desc_blk->block_ptr[desc_blk->n_max_used - 1].type == 0;
 172                     desc_blk->n_max_used--)
 173                         ;
 174         }
 175
 176         return (0);
 177 }
 178
 179 static int
 180 ether_add_proto_internal(struct ifnet *ifp, protocol_family_t protocol,
 181     const struct ifnet_demux_desc *demux)
 182 {
 183         struct en_desc *ed;
 184         struct ether_desc_blk_str *desc_blk =
 185             (struct ether_desc_blk_str *)ifp->if_family_cookie;
 186         u_int32_t i;
 187
 188         switch (demux->type) {
 189         /* These types are supported */
 190         /* Top three are preferred */
 191         case DLIL_DESC_ETYPE2:
 192                 if (demux->datalen != 2)
 193                         return (EINVAL);
 194                 break;
 195
 196         case DLIL_DESC_SAP:
 197                 if (demux->datalen != 3)
 198                         return (EINVAL);
 199                 break;
 200
 201         case DLIL_DESC_SNAP:
 202                 if (demux->datalen != 5)
 203                         return (EINVAL);
 204                 break;
 205
 206         default:
 207                 return (ENOTSUP);
 208         }
 209
 210         /* Verify a matching descriptor does not exist */
 211         if (desc_blk != NULL) {
 212                 switch (demux->type) {
 213                 case DLIL_DESC_ETYPE2:
 214                         for (i = 0; i < desc_blk->n_max_used; i++) {
 215                                 if (desc_blk->block_ptr[i].type ==
 216                                     DLIL_DESC_ETYPE2 &&
 217                                     desc_blk->block_ptr[i].data[0] ==
 218                                     *(u_int16_t*)demux->data) {
 219                                         return (EADDRINUSE);
 220                                 }
 221                         }
 222                         break;
 223                 case DLIL_DESC_SAP:
 224                 case DLIL_DESC_SNAP:
 225                         for (i = 0; i < desc_blk->n_max_used; i++) {
 226                                 if (desc_blk->block_ptr[i].type ==
 227                                     demux->type &&
 228                                     bcmp(desc_blk->block_ptr[i].data,
 229                                     demux->data, demux->datalen) == 0) {
 230                                         return (EADDRINUSE);
 231                                 }
 232                         }
 233                         break;
 234                 }
 235         }
 236
 237         /* Check for case where all of the descriptor blocks are in use */
 238         if (desc_blk == NULL || desc_blk->n_used == desc_blk->n_count) {
 239                 struct ether_desc_blk_str *tmp;
 240                 u_int32_t new_count = ETHER_DESC_BLK_SIZE;
 241                 u_int32_t new_size;
 242                 u_int32_t old_size = 0;
 243
 244                 i = 0;
 245
 246                 if (desc_blk) {
 247                         new_count += desc_blk->n_count;
 248                         old_size = desc_blk->n_count * sizeof (struct en_desc) +
 249                             ETHER_DESC_HEADER_SIZE;
 250                         i = desc_blk->n_used;
 251                 }
 252
 253                 new_size = new_count * sizeof (struct en_desc) +
 254                     ETHER_DESC_HEADER_SIZE;
 255
 256                 tmp = _MALLOC(new_size, M_IFADDR, M_WAITOK);
 257                 if (tmp  == NULL) {
 258                         /*
 259                          * Remove any previous descriptors set in the call.
 260                          */
 261                         return (ENOMEM);
 262                 }
 263
 264                 bzero(((char *)tmp) + old_size, new_size - old_size);
 265                 if (desc_blk) {
 266                         bcopy(desc_blk, tmp, old_size);
 267                         FREE(desc_blk, M_IFADDR);
 268                 }
 269                 desc_blk = tmp;
 270                 ifp->if_family_cookie = (uintptr_t)desc_blk;
 271                 desc_blk->n_count = new_count;
 272         } else {
 273                 /* Find a free entry */
 274                 for (i = 0; i < desc_blk->n_count; i++) {
 275                         if (desc_blk->block_ptr[i].type == 0) {
 276                                 break;
 277                         }
 278                 }
 279         }
 280
 281         /* Bump n_max_used if appropriate */
 282         if (i + 1 > desc_blk->n_max_used) {
 283                 desc_blk->n_max_used = i + 1;
 284         }
 285
 286         ed = &desc_blk->block_ptr[i];
 287         ed->protocol_family = protocol;
 288         ed->data[0] = 0;
 289         ed->data[1] = 0;
 290
 291         switch (demux->type) {
 292         case DLIL_DESC_ETYPE2:
 293                 /* 2 byte ethernet raw protocol type is at native_type */
 294                 /* prtocol must be in network byte order */
 295                 ed->type = DLIL_DESC_ETYPE2;
 296                 ed->data[0] = *(u_int16_t*)demux->data;
 297                 break;
 298
 299         case DLIL_DESC_SAP:
 300                 ed->type = DLIL_DESC_SAP;
 301                 bcopy(demux->data, &ed->data[0], 3);
 302                 break;
 303
 304         case DLIL_DESC_SNAP: {
 305                 u_int8_t*       pDest = ((u_int8_t*)&ed->data[0]) + 3;
 306                 ed->type = DLIL_DESC_SNAP;
 307                 bcopy(demux->data, pDest, 5);
 308                 break;
 309         }
 310         }
 311
 312         desc_blk->n_used++;
 313
 314         return (0);
 315 }
 316
 317 int
 318 ether_add_proto(ifnet_t  ifp, protocol_family_t protocol,
 319     const struct ifnet_demux_desc *demux_list, u_int32_t demux_count)
 320 {
 321         int error = 0;
 322         u_int32_t i;
 323
 324         for (i = 0; i < demux_count; i++) {
 325                 error = ether_add_proto_internal(ifp, protocol, &demux_list[i]);
 326                 if (error) {
 327                         ether_del_proto(ifp, protocol);
 328                         break;
 329                 }
 330         }
 331
 332         return (error);
 333 }
 334
 335 int
 336 ether_demux(ifnet_t ifp, mbuf_t m, char *frame_header,
 337     protocol_family_t *protocol_family)
 338 {
 339         struct ether_header *eh = (struct ether_header *)(void *)frame_header;
 340         u_short  ether_type = eh->ether_type;
 341         u_int16_t type;
 342         u_int8_t *data;
 343         u_int32_t i = 0;
 344         struct ether_desc_blk_str *desc_blk =
 345             (struct ether_desc_blk_str *)ifp->if_family_cookie;
 346         u_int32_t maxd = desc_blk ? desc_blk->n_max_used : 0;
 347         struct en_desc  *ed = desc_blk ? desc_blk->block_ptr : NULL;
 348         u_int32_t extProto1 = 0;
 349         u_int32_t extProto2 = 0;
 350
 351         if (eh->ether_dhost[0] & 1) {
 352                 /* Check for broadcast */
 353                 if (_ether_cmp(etherbroadcastaddr, eh->ether_dhost) == 0)
 354                         m->m_flags |= M_BCAST;
 355                 else
 356                         m->m_flags |= M_MCAST;
 357         }
 358
 359         if (m->m_flags & M_HASFCS) {
 360                 /*
 361                  * If the M_HASFCS is set by the driver we want to make sure
 362                  * that we strip off the trailing FCS data before handing it
 363                  * up the stack.
 364                  */
 365                 m_adj(m, -ETHER_CRC_LEN);
 366                 m->m_flags &= ~M_HASFCS;
 367         }
 368
 369         if (ifp->if_eflags & IFEF_BOND) {
 370                 /* if we're bonded, bond "protocol" gets all the packets */
 371                 *protocol_family = PF_BOND;
 372                 return (0);
 373         }
 374
 375         if ((eh->ether_dhost[0] & 1) == 0) {
 376                 /*
 377                  * When the driver is put into promiscuous mode we may receive
 378                  * unicast frames that are not intended for our interfaces.
 379                  * They are marked here as being promiscuous so the caller may
 380                  * dispose of them after passing the packets to any interface
 381                  * filters.
 382                  */
 383                 if (_ether_cmp(eh->ether_dhost, IF_LLADDR(ifp))) {
 384                         m->m_flags |= M_PROMISC;
 385                 }
 386         }
 387
 388         /* check for VLAN */
 389         if ((m->m_pkthdr.csum_flags & CSUM_VLAN_TAG_VALID) != 0) {
 390                 if (EVL_VLANOFTAG(m->m_pkthdr.vlan_tag) != 0) {
 391                         *protocol_family = PF_VLAN;
 392                         return (0);
 393                 }
 394                 /* the packet is just priority-tagged, clear the bit */
 395                 m->m_pkthdr.csum_flags &= ~CSUM_VLAN_TAG_VALID;
 396         } else if (ether_type == htons(ETHERTYPE_VLAN)) {
 397                 struct ether_vlan_header *      evl;
 398
 399                 evl = (struct ether_vlan_header *)(void *)frame_header;
 400                 if (m->m_len < ETHER_VLAN_ENCAP_LEN ||
 401                     ntohs(evl->evl_proto) == ETHERTYPE_VLAN ||
 402                     EVL_VLANOFTAG(ntohs(evl->evl_tag)) != 0) {
 403                         *protocol_family = PF_VLAN;
 404                         return (0);
 405                 }
 406                 /* the packet is just priority-tagged */
 407
 408                 /* make the encapsulated ethertype the actual ethertype */
 409                 ether_type = evl->evl_encap_proto = evl->evl_proto;
 410
 411                 /* remove the encapsulation header */
 412                 m->m_len -= ETHER_VLAN_ENCAP_LEN;
 413                 m->m_data += ETHER_VLAN_ENCAP_LEN;
 414                 m->m_pkthdr.len -= ETHER_VLAN_ENCAP_LEN;
 415                 m->m_pkthdr.csum_flags = 0; /* can't trust hardware checksum */
 416         } else if (ether_type == htons(ETHERTYPE_ARP))
 417                 m->m_pkthdr.pkt_flags |= PKTF_INET_RESOLVE; /* ARP packet */
 418
 419         data = mtod(m, u_int8_t*);
 420
 421         /*
 422         * Determine the packet's protocol type and stuff the protocol into
 423         * longs for quick compares.
 424         */
 425         if (ntohs(ether_type) <= 1500) {
 426                 bcopy(data, &extProto1, sizeof (u_int32_t));
 427
 428                 /* SAP or SNAP */
 429                 if ((extProto1 & htonl(0xFFFFFF00)) == htonl(0xAAAA0300)) {
 430                         /* SNAP */
 431                         type = DLIL_DESC_SNAP;
 432                         bcopy(data + sizeof (u_int32_t), &extProto2,
 433                             sizeof (u_int32_t));
 434                         extProto1 &= htonl(0x000000FF);
 435                 } else {
 436                         type = DLIL_DESC_SAP;
 437                         extProto1 &= htonl(0xFFFFFF00);
 438                 }
 439         } else {
 440                 type = DLIL_DESC_ETYPE2;
 441         }
 442
 443         /*
 444         * Search through the connected protocols for a match.
 445         */
 446         switch (type) {
 447         case DLIL_DESC_ETYPE2:
 448                 for (i = 0; i < maxd; i++) {
 449                         if ((ed[i].type == type) &&
 450                             (ed[i].data[0] == ether_type)) {
 451                                 *protocol_family = ed[i].protocol_family;
 452                                 return (0);
 453                         }
 454                 }
 455                 break;
 456
 457         case DLIL_DESC_SAP:
 458                 for (i = 0; i < maxd; i++) {
 459                         if ((ed[i].type == type) &&
 460                             (ed[i].data[0] == extProto1)) {
 461                                 *protocol_family = ed[i].protocol_family;
 462                                 return (0);
 463                         }
 464                 }
 465                 break;
 466
 467         case DLIL_DESC_SNAP:
 468                 for (i = 0; i < maxd; i++) {
 469                         if ((ed[i].type == type) &&
 470                             (ed[i].data[0] == extProto1) &&
 471                                 (ed[i].data[1] == extProto2)) {
 472                                 *protocol_family = ed[i].protocol_family;
 473                                 return (0);
 474                         }
 475                 }
 476         break;
 477         }
 478
 479         return (ENOENT);
 480 }
 481
 482 /*
 483  * On embedded, ether_frameout is practicaly ether_frameout_extended.
 484  * On non-embedded, ether_frameout has long been exposed as a public KPI,
 485  * and therefore its signature must remain the same (without the pre- and
 486  * postpend length parameters.)
 487  */
 488 #if KPI_INTERFACE_EMBEDDED
 489 int
 490 ether_frameout(struct ifnet *ifp, struct mbuf **m,
 491     const struct sockaddr *ndest, const char *edst,
 492     const char *ether_type, u_int32_t *prepend_len, u_int32_t *postpend_len)
 493 #else /* !KPI_INTERFACE_EMBEDDED */
 494 int
 495 ether_frameout(struct ifnet *ifp, struct mbuf **m,
 496     const struct sockaddr *ndest, const char *edst,
 497     const char *ether_type)
 498 #endif /* KPI_INTERFACE_EMBEDDED */
 499 {
 500 #if KPI_INTERFACE_EMBEDDED
 501         return (ether_frameout_extended(ifp, m, ndest, edst, ether_type,
 502             prepend_len, postpend_len));
 503 #else /* !KPI_INTERFACE_EMBEDDED */
 504         return (ether_frameout_extended(ifp, m, ndest, edst, ether_type,
 505             NULL, NULL));
 506 #endif /* !KPI_INTERFACE_EMBEDDED */
 507 }
 508
 509 /*
 510  * Ethernet output routine.
 511  * Encapsulate a packet of type family for the local net.
 512  * Use trailer local net encapsulation if enough data in first
 513  * packet leaves a multiple of 512 bytes of data in remainder.
 514  */
 515 int
 516 ether_frameout_extended(struct ifnet *ifp, struct mbuf **m,
 517     const struct sockaddr *ndest, const char *edst,
 518     const char *ether_type, u_int32_t *prepend_len, u_int32_t *postpend_len)
 519 {
 520         struct ether_header *eh;
 521         int hlen;       /* link layer header length */
 522
 523         hlen = ETHER_HDR_LEN;
 524
 525         /*
 526          * If a simplex interface, and the packet is being sent to our
 527          * Ethernet address or a broadcast address, loopback a copy.
 528          * XXX To make a simplex device behave exactly like a duplex
 529          * device, we should copy in the case of sending to our own
 530          * ethernet address (thus letting the original actually appear
 531          * on the wire). However, we don't do that here for security
 532          * reasons and compatibility with the original behavior.
 533          */
 534         if ((ifp->if_flags & IFF_SIMPLEX) &&
 535             ((*m)->m_flags & M_LOOP) && lo_ifp != NULL) {
 536                 if ((*m)->m_flags & M_BCAST) {
 537                         struct mbuf *n = m_copy(*m, 0, (int)M_COPYALL);
 538                         if (n != NULL) {
 539                                 dlil_output(lo_ifp, ndest->sa_family,
 540                                     n, NULL, ndest, 0, NULL);
 541                         }
 542                 } else if (_ether_cmp(edst, IF_LLADDR(ifp)) == 0) {
 543                         dlil_output(lo_ifp, ndest->sa_family, *m,
 544                             NULL, ndest, 0, NULL);
 545                         return (EJUSTRETURN);
 546                 }
 547         }
 548
 549         /*
 550          * Add local net header.  If no space in first mbuf,
 551          * allocate another.
 552          */
 553         M_PREPEND(*m, sizeof (struct ether_header), M_DONTWAIT, 0);
 554         if (*m == NULL)
 555                 return (EJUSTRETURN);
 556
 557         if (prepend_len != NULL)
 558                 *prepend_len = sizeof (struct ether_header);
 559         if (postpend_len != NULL)
 560                 *postpend_len = 0;
 561
 562         eh = mtod(*m, struct ether_header *);
 563         (void) memcpy(&eh->ether_type, ether_type, sizeof(eh->ether_type));
 564         (void) memcpy(eh->ether_dhost, edst, ETHER_ADDR_LEN);
 565         ifnet_lladdr_copy_bytes(ifp, eh->ether_shost, ETHER_ADDR_LEN);
 566
 567         return (0);
 568 }
 569
 570 errno_t
 571 ether_check_multi(ifnet_t ifp, const struct sockaddr *proto_addr)
 572 {
 573 #pragma unused(ifp)
 574         errno_t result = EAFNOSUPPORT;
 575         const u_char *e_addr;
 576
 577         /*
 578          * AF_SPEC and AF_LINK don't require translation. We do
 579          * want to verify that they specify a valid multicast.
 580          */
 581         switch(proto_addr->sa_family) {
 582         case AF_UNSPEC:
 583                 e_addr = (const u_char*)&proto_addr->sa_data[0];
 584                 if ((e_addr[0] & 0x01) != 0x01)
 585                         result = EADDRNOTAVAIL;
 586                 else
 587                         result = 0;
 588                 break;
 589
 590         case AF_LINK:
 591                 e_addr = CONST_LLADDR((const struct sockaddr_dl*)
 592                     (uintptr_t)(size_t)proto_addr);
 593                 if ((e_addr[0] & 0x01) != 0x01)
 594                         result = EADDRNOTAVAIL;
 595                 else
 596                         result = 0;
 597                 break;
 598         }
 599
 600         return (result);
 601 }
 602
 603 int
 604 ether_ioctl(ifnet_t ifp, u_int32_t command, void *data)
 605 {
 606 #pragma unused(ifp, command, data)
 607         return (EOPNOTSUPP);
 608 }
 609
 610 __private_extern__ int
 611 ether_family_init(void)
 612 {
 613         errno_t error = 0;
 614
 615         /* Register protocol registration functions */
 616         if ((error = proto_register_plumber(PF_INET, APPLE_IF_FAM_ETHERNET,
 617             ether_attach_inet, ether_detach_inet)) != 0) {
 618                 printf("proto_register_plumber failed for PF_INET error=%d\n",
 619                     error);
 620                 goto done;
 621         }
 622 #if INET6
 623         if ((error = proto_register_plumber(PF_INET6, APPLE_IF_FAM_ETHERNET,
 624             ether_attach_inet6, ether_detach_inet6)) != 0) {
 625                 printf("proto_register_plumber failed for PF_INET6 error=%d\n",
 626                     error);
 627                 goto done;
 628         }
 629 #endif /* INET6 */
 630 #if VLAN
 631         vlan_family_init();
 632 #endif /* VLAN */
 633 #if BOND
 634         bond_family_init();
 635 #endif /* BOND */
 636 #if IF_BRIDGE
 637         bridgeattach(0);
 638 #endif /* IF_BRIDGE */
 639 done:
 640
 641         return (error);
 642 }