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 #if IF_FAKE
 106 #include <net/if_fake_var.h>
 107 #endif /* IF_FAKE */
 108
 109 #include <net/dlil.h>
 110
 111 SYSCTL_DECL(_net_link);
 112 SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW|CTLFLAG_LOCKED, 0,
 113     "Ethernet");
 114
 115 struct en_desc {
 116         u_int16_t type;                 /* Type of protocol stored in data */
 117         u_int32_t protocol_family;      /* Protocol family */
 118         u_int32_t data[2];              /* Protocol data */
 119 };
 120
 121 /* descriptors are allocated in blocks of ETHER_DESC_BLK_SIZE */
 122 #if CONFIG_EMBEDDED
 123 #define ETHER_DESC_BLK_SIZE (2) /* IP, ARP */
 124 #else
 125 #define ETHER_DESC_BLK_SIZE (10)
 126 #endif
 127
 128 /*
 129  * Header for the demux list, hangs off of IFP at if_family_cookie
 130  */
 131 struct ether_desc_blk_str {
 132         u_int32_t  n_max_used;
 133         u_int32_t       n_count;
 134         u_int32_t       n_used;
 135         struct en_desc  block_ptr[1];
 136 };
 137
 138 /* Size of the above struct before the array of struct en_desc */
 139 #define ETHER_DESC_HEADER_SIZE  \
 140         ((size_t) offsetof(struct ether_desc_blk_str, block_ptr))
 141
 142 __private_extern__ u_char etherbroadcastaddr[ETHER_ADDR_LEN] =
 143     { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 144
 145 /*
 146  * Release all descriptor entries owned by this protocol (there may be several).
 147  * Setting the type to 0 releases the entry. Eventually we should compact-out
 148  * the unused entries.
 149  */
 150 int
 151 ether_del_proto(ifnet_t ifp, protocol_family_t protocol_family)
 152 {
 153         struct ether_desc_blk_str *desc_blk =
 154             (struct ether_desc_blk_str *)ifp->if_family_cookie;
 155         u_int32_t current = 0;
 156         int found = 0;
 157
 158         if (desc_blk == NULL)
 159                 return (0);
 160
 161         for (current = desc_blk->n_max_used; current > 0; current--) {
 162                 if (desc_blk->block_ptr[current - 1].protocol_family ==
 163                     protocol_family) {
 164                         found = 1;
 165                         desc_blk->block_ptr[current - 1].type = 0;
 166                         desc_blk->n_used--;
 167                 }
 168         }
 169
 170         if (desc_blk->n_used == 0) {
 171                 FREE(ifp->if_family_cookie, M_IFADDR);
 172                 ifp->if_family_cookie = 0;
 173         } else {
 174                 /* Decrement n_max_used */
 175                 for (; desc_blk->n_max_used > 0 &&
 176                     desc_blk->block_ptr[desc_blk->n_max_used - 1].type == 0;
 177                     desc_blk->n_max_used--)
 178                         ;
 179         }
 180
 181         return (0);
 182 }
 183
 184 static int
 185 ether_add_proto_internal(struct ifnet *ifp, protocol_family_t protocol,
 186     const struct ifnet_demux_desc *demux)
 187 {
 188         struct en_desc *ed;
 189         struct ether_desc_blk_str *desc_blk =
 190             (struct ether_desc_blk_str *)ifp->if_family_cookie;
 191         u_int32_t i;
 192
 193         switch (demux->type) {
 194         /* These types are supported */
 195         /* Top three are preferred */
 196         case DLIL_DESC_ETYPE2:
 197                 if (demux->datalen != 2)
 198                         return (EINVAL);
 199                 break;
 200
 201         case DLIL_DESC_SAP:
 202                 if (demux->datalen != 3)
 203                         return (EINVAL);
 204                 break;
 205
 206         case DLIL_DESC_SNAP:
 207                 if (demux->datalen != 5)
 208                         return (EINVAL);
 209                 break;
 210
 211         default:
 212                 return (ENOTSUP);
 213         }
 214
 215         /* Verify a matching descriptor does not exist */
 216         if (desc_blk != NULL) {
 217                 switch (demux->type) {
 218                 case DLIL_DESC_ETYPE2:
 219                         for (i = 0; i < desc_blk->n_max_used; i++) {
 220                                 if (desc_blk->block_ptr[i].type ==
 221                                     DLIL_DESC_ETYPE2 &&
 222                                     desc_blk->block_ptr[i].data[0] ==
 223                                     *(u_int16_t*)demux->data) {
 224                                         return (EADDRINUSE);
 225                                 }
 226                         }
 227                         break;
 228                 case DLIL_DESC_SAP:
 229                 case DLIL_DESC_SNAP:
 230                         for (i = 0; i < desc_blk->n_max_used; i++) {
 231                                 if (desc_blk->block_ptr[i].type ==
 232                                     demux->type &&
 233                                     bcmp(desc_blk->block_ptr[i].data,
 234                                     demux->data, demux->datalen) == 0) {
 235                                         return (EADDRINUSE);
 236                                 }
 237                         }
 238                         break;
 239                 }
 240         }
 241
 242         /* Check for case where all of the descriptor blocks are in use */
 243         if (desc_blk == NULL || desc_blk->n_used == desc_blk->n_count) {
 244                 struct ether_desc_blk_str *tmp;
 245                 u_int32_t new_count = ETHER_DESC_BLK_SIZE;
 246                 u_int32_t new_size;
 247                 u_int32_t old_size = 0;
 248
 249                 i = 0;
 250
 251                 if (desc_blk) {
 252                         new_count += desc_blk->n_count;
 253                         old_size = desc_blk->n_count * sizeof (struct en_desc) +
 254                             ETHER_DESC_HEADER_SIZE;
 255                         i = desc_blk->n_used;
 256                 }
 257
 258                 new_size = new_count * sizeof (struct en_desc) +
 259                     ETHER_DESC_HEADER_SIZE;
 260
 261                 tmp = _MALLOC(new_size, M_IFADDR, M_WAITOK);
 262                 if (tmp  == NULL) {
 263                         /*
 264                          * Remove any previous descriptors set in the call.
 265                          */
 266                         return (ENOMEM);
 267                 }
 268
 269                 bzero(((char *)tmp) + old_size, new_size - old_size);
 270                 if (desc_blk) {
 271                         bcopy(desc_blk, tmp, old_size);
 272                         FREE(desc_blk, M_IFADDR);
 273                 }
 274                 desc_blk = tmp;
 275                 ifp->if_family_cookie = (uintptr_t)desc_blk;
 276                 desc_blk->n_count = new_count;
 277         } else {
 278                 /* Find a free entry */
 279                 for (i = 0; i < desc_blk->n_count; i++) {
 280                         if (desc_blk->block_ptr[i].type == 0) {
 281                                 break;
 282                         }
 283                 }
 284         }
 285
 286         /* Bump n_max_used if appropriate */
 287         if (i + 1 > desc_blk->n_max_used) {
 288                 desc_blk->n_max_used = i + 1;
 289         }
 290
 291         ed = &desc_blk->block_ptr[i];
 292         ed->protocol_family = protocol;
 293         ed->data[0] = 0;
 294         ed->data[1] = 0;
 295
 296         switch (demux->type) {
 297         case DLIL_DESC_ETYPE2:
 298                 /* 2 byte ethernet raw protocol type is at native_type */
 299                 /* prtocol must be in network byte order */
 300                 ed->type = DLIL_DESC_ETYPE2;
 301                 ed->data[0] = *(u_int16_t*)demux->data;
 302                 break;
 303
 304         case DLIL_DESC_SAP:
 305                 ed->type = DLIL_DESC_SAP;
 306                 bcopy(demux->data, &ed->data[0], 3);
 307                 break;
 308
 309         case DLIL_DESC_SNAP: {
 310                 u_int8_t*       pDest = ((u_int8_t*)&ed->data[0]) + 3;
 311                 ed->type = DLIL_DESC_SNAP;
 312                 bcopy(demux->data, pDest, 5);
 313                 break;
 314         }
 315         }
 316
 317         desc_blk->n_used++;
 318
 319         return (0);
 320 }
 321
 322 int
 323 ether_add_proto(ifnet_t  ifp, protocol_family_t protocol,
 324     const struct ifnet_demux_desc *demux_list, u_int32_t demux_count)
 325 {
 326         int error = 0;
 327         u_int32_t i;
 328
 329         for (i = 0; i < demux_count; i++) {
 330                 error = ether_add_proto_internal(ifp, protocol, &demux_list[i]);
 331                 if (error) {
 332                         ether_del_proto(ifp, protocol);
 333                         break;
 334                 }
 335         }
 336
 337         return (error);
 338 }
 339
 340 int
 341 ether_demux(ifnet_t ifp, mbuf_t m, char *frame_header,
 342     protocol_family_t *protocol_family)
 343 {
 344         struct ether_header *eh = (struct ether_header *)(void *)frame_header;
 345         u_short  ether_type = eh->ether_type;
 346         u_int16_t type;
 347         u_int8_t *data;
 348         u_int32_t i = 0;
 349         struct ether_desc_blk_str *desc_blk =
 350             (struct ether_desc_blk_str *)ifp->if_family_cookie;
 351         u_int32_t maxd = desc_blk ? desc_blk->n_max_used : 0;
 352         struct en_desc  *ed = desc_blk ? desc_blk->block_ptr : NULL;
 353         u_int32_t extProto1 = 0;
 354         u_int32_t extProto2 = 0;
 355
 356         if (eh->ether_dhost[0] & 1) {
 357                 /* Check for broadcast */
 358                 if (_ether_cmp(etherbroadcastaddr, eh->ether_dhost) == 0)
 359                         m->m_flags |= M_BCAST;
 360                 else
 361                         m->m_flags |= M_MCAST;
 362         }
 363
 364         if (m->m_flags & M_HASFCS) {
 365                 /*
 366                  * If the M_HASFCS is set by the driver we want to make sure
 367                  * that we strip off the trailing FCS data before handing it
 368                  * up the stack.
 369                  */
 370                 m_adj(m, -ETHER_CRC_LEN);
 371                 m->m_flags &= ~M_HASFCS;
 372         }
 373
 374         if (ifp->if_eflags & IFEF_BOND) {
 375                 /* if we're bonded, bond "protocol" gets all the packets */
 376                 *protocol_family = PF_BOND;
 377                 return (0);
 378         }
 379
 380         if ((eh->ether_dhost[0] & 1) == 0) {
 381                 /*
 382                  * When the driver is put into promiscuous mode we may receive
 383                  * unicast frames that are not intended for our interfaces.
 384                  * They are marked here as being promiscuous so the caller may
 385                  * dispose of them after passing the packets to any interface
 386                  * filters.
 387                  */
 388                 if (_ether_cmp(eh->ether_dhost, IF_LLADDR(ifp))) {
 389                         m->m_flags |= M_PROMISC;
 390                 }
 391         }
 392
 393         /* check for VLAN */
 394         if ((m->m_pkthdr.csum_flags & CSUM_VLAN_TAG_VALID) != 0) {
 395                 if (EVL_VLANOFTAG(m->m_pkthdr.vlan_tag) != 0) {
 396                         *protocol_family = PF_VLAN;
 397                         return (0);
 398                 }
 399                 /* the packet is just priority-tagged, clear the bit */
 400                 m->m_pkthdr.csum_flags &= ~CSUM_VLAN_TAG_VALID;
 401         } else if (ether_type == htons(ETHERTYPE_VLAN)) {
 402                 struct ether_vlan_header *      evl;
 403
 404                 evl = (struct ether_vlan_header *)(void *)frame_header;
 405                 if (m->m_len < ETHER_VLAN_ENCAP_LEN ||
 406                     ntohs(evl->evl_proto) == ETHERTYPE_VLAN ||
 407                     EVL_VLANOFTAG(ntohs(evl->evl_tag)) != 0) {
 408                         *protocol_family = PF_VLAN;
 409                         return (0);
 410                 }
 411                 /* the packet is just priority-tagged */
 412
 413                 /* make the encapsulated ethertype the actual ethertype */
 414                 ether_type = evl->evl_encap_proto = evl->evl_proto;
 415
 416                 /* remove the encapsulation header */
 417                 m->m_len -= ETHER_VLAN_ENCAP_LEN;
 418                 m->m_data += ETHER_VLAN_ENCAP_LEN;
 419                 m->m_pkthdr.len -= ETHER_VLAN_ENCAP_LEN;
 420                 m->m_pkthdr.csum_flags = 0; /* can't trust hardware checksum */
 421         } else if (ether_type == htons(ETHERTYPE_ARP))
 422                 m->m_pkthdr.pkt_flags |= PKTF_INET_RESOLVE; /* ARP packet */
 423
 424         data = mtod(m, u_int8_t*);
 425
 426         /*
 427         * Determine the packet's protocol type and stuff the protocol into
 428         * longs for quick compares.
 429         */
 430         if (ntohs(ether_type) <= 1500) {
 431                 bcopy(data, &extProto1, sizeof (u_int32_t));
 432
 433                 /* SAP or SNAP */
 434                 if ((extProto1 & htonl(0xFFFFFF00)) == htonl(0xAAAA0300)) {
 435                         /* SNAP */
 436                         type = DLIL_DESC_SNAP;
 437                         bcopy(data + sizeof (u_int32_t), &extProto2,
 438                             sizeof (u_int32_t));
 439                         extProto1 &= htonl(0x000000FF);
 440                 } else {
 441                         type = DLIL_DESC_SAP;
 442                         extProto1 &= htonl(0xFFFFFF00);
 443                 }
 444         } else {
 445                 type = DLIL_DESC_ETYPE2;
 446         }
 447
 448         /*
 449         * Search through the connected protocols for a match.
 450         */
 451         switch (type) {
 452         case DLIL_DESC_ETYPE2:
 453                 for (i = 0; i < maxd; i++) {
 454                         if ((ed[i].type == type) &&
 455                             (ed[i].data[0] == ether_type)) {
 456                                 *protocol_family = ed[i].protocol_family;
 457                                 return (0);
 458                         }
 459                 }
 460                 break;
 461
 462         case DLIL_DESC_SAP:
 463                 for (i = 0; i < maxd; i++) {
 464                         if ((ed[i].type == type) &&
 465                             (ed[i].data[0] == extProto1)) {
 466                                 *protocol_family = ed[i].protocol_family;
 467                                 return (0);
 468                         }
 469                 }
 470                 break;
 471
 472         case DLIL_DESC_SNAP:
 473                 for (i = 0; i < maxd; i++) {
 474                         if ((ed[i].type == type) &&
 475                             (ed[i].data[0] == extProto1) &&
 476                                 (ed[i].data[1] == extProto2)) {
 477                                 *protocol_family = ed[i].protocol_family;
 478                                 return (0);
 479                         }
 480                 }
 481         break;
 482         }
 483
 484         return (ENOENT);
 485 }
 486
 487 /*
 488  * On embedded, ether_frameout is practicaly ether_frameout_extended.
 489  * On non-embedded, ether_frameout has long been exposed as a public KPI,
 490  * and therefore its signature must remain the same (without the pre- and
 491  * postpend length parameters.)
 492  */
 493 #if 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, u_int32_t *prepend_len, u_int32_t *postpend_len)
 498 #else /* !KPI_INTERFACE_EMBEDDED */
 499 int
 500 ether_frameout(struct ifnet *ifp, struct mbuf **m,
 501     const struct sockaddr *ndest, const char *edst,
 502     const char *ether_type)
 503 #endif /* KPI_INTERFACE_EMBEDDED */
 504 {
 505 #if KPI_INTERFACE_EMBEDDED
 506         return (ether_frameout_extended(ifp, m, ndest, edst, ether_type,
 507             prepend_len, postpend_len));
 508 #else /* !KPI_INTERFACE_EMBEDDED */
 509         return (ether_frameout_extended(ifp, m, ndest, edst, ether_type,
 510             NULL, NULL));
 511 #endif /* !KPI_INTERFACE_EMBEDDED */
 512 }
 513
 514 /*
 515  * Ethernet output routine.
 516  * Encapsulate a packet of type family for the local net.
 517  * Use trailer local net encapsulation if enough data in first
 518  * packet leaves a multiple of 512 bytes of data in remainder.
 519  */
 520 int
 521 ether_frameout_extended(struct ifnet *ifp, struct mbuf **m,
 522     const struct sockaddr *ndest, const char *edst,
 523     const char *ether_type, u_int32_t *prepend_len, u_int32_t *postpend_len)
 524 {
 525         struct ether_header *eh;
 526         int hlen;       /* link layer header length */
 527
 528         hlen = ETHER_HDR_LEN;
 529
 530         /*
 531          * If a simplex interface, and the packet is being sent to our
 532          * Ethernet address or a broadcast address, loopback a copy.
 533          * XXX To make a simplex device behave exactly like a duplex
 534          * device, we should copy in the case of sending to our own
 535          * ethernet address (thus letting the original actually appear
 536          * on the wire). However, we don't do that here for security
 537          * reasons and compatibility with the original behavior.
 538          */
 539         if ((ifp->if_flags & IFF_SIMPLEX) &&
 540             ((*m)->m_flags & M_LOOP) && lo_ifp != NULL) {
 541                 if ((*m)->m_flags & M_BCAST) {
 542                         struct mbuf *n = m_copy(*m, 0, (int)M_COPYALL);
 543                         if (n != NULL) {
 544                                 dlil_output(lo_ifp, ndest->sa_family,
 545                                     n, NULL, ndest, 0, NULL);
 546                         }
 547                 } else if (_ether_cmp(edst, IF_LLADDR(ifp)) == 0) {
 548                         dlil_output(lo_ifp, ndest->sa_family, *m,
 549                             NULL, ndest, 0, NULL);
 550                         return (EJUSTRETURN);
 551                 }
 552         }
 553
 554         /*
 555          * Add local net header.  If no space in first mbuf,
 556          * allocate another.
 557          */
 558         M_PREPEND(*m, sizeof (struct ether_header), M_DONTWAIT, 0);
 559         if (*m == NULL)
 560                 return (EJUSTRETURN);
 561
 562         if (prepend_len != NULL)
 563                 *prepend_len = sizeof (struct ether_header);
 564         if (postpend_len != NULL)
 565                 *postpend_len = 0;
 566
 567         eh = mtod(*m, struct ether_header *);
 568         (void) memcpy(&eh->ether_type, ether_type, sizeof(eh->ether_type));
 569         (void) memcpy(eh->ether_dhost, edst, ETHER_ADDR_LEN);
 570         ifnet_lladdr_copy_bytes(ifp, eh->ether_shost, ETHER_ADDR_LEN);
 571
 572         return (0);
 573 }
 574
 575 errno_t
 576 ether_check_multi(ifnet_t ifp, const struct sockaddr *proto_addr)
 577 {
 578 #pragma unused(ifp)
 579         errno_t result = EAFNOSUPPORT;
 580         const u_char *e_addr;
 581
 582         /*
 583          * AF_SPEC and AF_LINK don't require translation. We do
 584          * want to verify that they specify a valid multicast.
 585          */
 586         switch(proto_addr->sa_family) {
 587         case AF_UNSPEC:
 588                 e_addr = (const u_char*)&proto_addr->sa_data[0];
 589                 if ((e_addr[0] & 0x01) != 0x01)
 590                         result = EADDRNOTAVAIL;
 591                 else
 592                         result = 0;
 593                 break;
 594
 595         case AF_LINK:
 596                 e_addr = CONST_LLADDR((const struct sockaddr_dl*)
 597                     (uintptr_t)(size_t)proto_addr);
 598                 if ((e_addr[0] & 0x01) != 0x01)
 599                         result = EADDRNOTAVAIL;
 600                 else
 601                         result = 0;
 602                 break;
 603         }
 604
 605         return (result);
 606 }
 607
 608 int
 609 ether_ioctl(ifnet_t ifp, u_int32_t command, void *data)
 610 {
 611 #pragma unused(ifp, command, data)
 612         return (EOPNOTSUPP);
 613 }
 614
 615 __private_extern__ int
 616 ether_family_init(void)
 617 {
 618         errno_t error = 0;
 619
 620         /* Register protocol registration functions */
 621         if ((error = proto_register_plumber(PF_INET, APPLE_IF_FAM_ETHERNET,
 622             ether_attach_inet, ether_detach_inet)) != 0) {
 623                 printf("proto_register_plumber failed for PF_INET error=%d\n",
 624                     error);
 625                 goto done;
 626         }
 627 #if INET6
 628         if ((error = proto_register_plumber(PF_INET6, APPLE_IF_FAM_ETHERNET,
 629             ether_attach_inet6, ether_detach_inet6)) != 0) {
 630                 printf("proto_register_plumber failed for PF_INET6 error=%d\n",
 631                     error);
 632                 goto done;
 633         }
 634 #endif /* INET6 */
 635 #if VLAN
 636         vlan_family_init();
 637 #endif /* VLAN */
 638 #if BOND
 639         bond_family_init();
 640 #endif /* BOND */
 641 #if IF_BRIDGE
 642         bridgeattach(0);
 643 #endif /* IF_BRIDGE */
 644 #if IF_FAKE
 645         if_fake_init();
 646 #endif /* IF_FAKE */
 647
 648 done:
 649
 650         return (error);
 651 }