bsd/net/if_fddisubr.c

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * Copyright (c) 1995, 1996
  32  *      Matt Thomas <matt@3am-software.com>.  All rights reserved.
  33  * Copyright (c) 1982, 1989, 1993
  34  *      The Regents of the University of California.  All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. All advertising materials mentioning features or use of this software
  45  *    must display the following acknowledgement:
  46  *      This product includes software developed by the University of
  47  *      California, Berkeley and its contributors.
  48  * 4. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  *
  64  *      from: if_ethersubr.c,v 1.5 1994/12/13 22:31:45 wollman Exp
  65  */
  66
  67 #include "opt_atalk.h"
  68 #include "opt_inet.h"
  69 #include "opt_ipx.h"
  70
  71 #include <sys/param.h>
  72 #include <sys/systm.h>
  73 #include <sys/mbuf.h>
  74 #include <sys/socket.h>
  75
  76 #include <net/if.h>
  77 #include <net/netisr.h>
  78 #include <net/route.h>
  79 #include <net/if_llc.h>
  80 #include <net/if_dl.h>
  81 #include <net/if_types.h>
  82
  83 #if INET
  84 #include <netinet/in.h>
  85 #include <netinet/in_var.h>
  86 #include <netinet/if_ether.h>
  87 #endif
  88 #if defined(__FreeBSD__)
  89 #include <netinet/if_fddi.h>
  90 #else
  91 #include <net/if_fddi.h>
  92 #endif
  93
  94 #if IPX
  95 #include <netipx/ipx.h>
  96 #include <netipx/ipx_if.h>
  97 #endif
  98
  99 #if DECNET
 100 #include <netdnet/dn.h>
 101 #endif
 102
 103 #include "bpfilter.h"
 104
 105 #define senderr(e) { error = (e); goto bad;}
 106
 107 /*
 108  * This really should be defined in if_llc.h but in case it isn't.
 109  */
 110 #ifndef llc_snap
 111 #define llc_snap        llc_un.type_snap
 112 #endif
 113
 114 #if defined(__bsdi__) || defined(__NetBSD__)
 115 #define RTALLOC1(a, b)                  rtalloc1(a, b)
 116 #define ARPRESOLVE(a, b, c, d, e, f)    arpresolve(a, b, c, d, e)
 117 #elif defined(__FreeBSD__)
 118 #define RTALLOC1(a, b)                  rtalloc1(a, b, 0UL)
 119 #define ARPRESOLVE(a, b, c, d, e, f)    arpresolve(a, b, c, d, e, f)
 120 #endif
 121 /*
 122  * FDDI output routine.
 123  * Encapsulate a packet of type family for the local net.
 124  * Use trailer local net encapsulation if enough data in first
 125  * packet leaves a multiple of 512 bytes of data in remainder.
 126  * Assumes that ifp is actually pointer to arpcom structure.
 127  */
 128 int
 129 fddi_output(ifp, m0, dst, rt0)
 130         register struct ifnet *ifp;
 131         struct mbuf *m0;
 132         struct sockaddr *dst;
 133         struct rtentry *rt0;
 134 {
 135         u_int16_t type;
 136         int s, loop_copy = 0, error = 0;
 137         u_char edst[6];
 138         register struct mbuf *m = m0;
 139         register struct rtentry *rt;
 140         register struct fddi_header *fh;
 141         struct arpcom *ac = (struct arpcom *)ifp;
 142
 143         if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
 144                 senderr(ENETDOWN);
 145         getmicrotime(&ifp->if_lastchange);
 146 #if !defined(__bsdi__) || _BSDI_VERSION >= 199401
 147         if (rt = rt0) {
 148                 if ((rt->rt_flags & RTF_UP) == 0) {
 149                         if (rt0 = rt = RTALLOC1(dst, 1))
 150                                 rtunref(rt);
 151                         else
 152                                 senderr(EHOSTUNREACH);
 153                 }
 154                 if (rt->rt_flags & RTF_GATEWAY) {
 155                         if (rt->rt_gwroute == 0)
 156                                 goto lookup;
 157                         if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
 158                                 rtfree(rt); rt = rt0;
 159                         lookup: rt->rt_gwroute = RTALLOC1(rt->rt_gateway, 1);
 160                                 if ((rt = rt->rt_gwroute) == 0)
 161                                         senderr(EHOSTUNREACH);
 162                         }
 163                 }
 164                 if (rt->rt_flags & RTF_REJECT)
 165                         if (rt->rt_rmx.rmx_expire == 0 ||
 166                             time_second < rt->rt_rmx.rmx_expire)
 167                                 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH);
 168         }
 169 #endif
 170         switch (dst->sa_family) {
 171
 172 #if INET
 173         case AF_INET: {
 174 #if !defined(__bsdi__) || _BSDI_VERSION >= 199401
 175                 if (!ARPRESOLVE(ac, rt, m, dst, edst, rt0))
 176                         return (0);     /* if not yet resolved */
 177 #else
 178                 int usetrailers;
 179                 if (!arpresolve(ac, m, &((struct sockaddr_in *)dst)->sin_addr, edst, &usetrailers))
 180                         return (0);     /* if not yet resolved */
 181 #endif
 182                 type = htons(ETHERTYPE_IP);
 183                 break;
 184         }
 185 #endif
 186 #if IPX
 187         case AF_IPX:
 188                 type = htons(ETHERTYPE_IPX);
 189                 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
 190                     (caddr_t)edst, sizeof (edst));
 191                 break;
 192 #endif
 193
 194 #if NS
 195         case AF_NS:
 196                 type = htons(ETHERTYPE_NS);
 197                 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host),
 198                     (caddr_t)edst, sizeof (edst));
 199                 break;
 200 #endif
 201 #if     ISO
 202         case AF_ISO: {
 203                 int     snpalen;
 204                 struct  llc *l;
 205                 register struct sockaddr_dl *sdl;
 206
 207                 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) &&
 208                     sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) {
 209                         bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst));
 210                 } else if (error =
 211                             iso_snparesolve(ifp, (struct sockaddr_iso *)dst,
 212                                             (char *)edst, &snpalen))
 213                         goto bad; /* Not Resolved */
 214                 /* If broadcasting on a simplex interface, loopback a copy */
 215                 if (*edst & 1)
 216                         m->m_flags |= (M_BCAST|M_MCAST);
 217                 M_PREPEND(m, 3, M_DONTWAIT);
 218                 if (m == NULL)
 219                         return (0);
 220                 type = 0;
 221                 l = mtod(m, struct llc *);
 222                 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP;
 223                 l->llc_control = LLC_UI;
 224                 IFDEBUG(D_ETHER)
 225                         int i;
 226                         printf("unoutput: sending pkt to: ");
 227                         for (i=0; i<6; i++)
 228                                 printf("%x ", edst[i] & 0xff);
 229                         printf("\n");
 230                 ENDDEBUG
 231                 } break;
 232 #endif /* ISO */
 233 #if     LLC
 234 /*      case AF_NSAP: */
 235         case AF_CCITT: {
 236                 register struct sockaddr_dl *sdl =
 237                         (struct sockaddr_dl *) rt -> rt_gateway;
 238
 239                 if (sdl && sdl->sdl_family != AF_LINK && sdl->sdl_alen <= 0)
 240                         goto bad; /* Not a link interface ? Funny ... */
 241                 bcopy(LLADDR(sdl), (char *)edst, sizeof(edst));
 242                 if (*edst & 1)
 243                         loop_copy = 1;
 244                 type = 0;
 245 #if LLC_DEBUG
 246                 {
 247                         int i;
 248                         register struct llc *l = mtod(m, struct llc *);
 249
 250                         printf("fddi_output: sending LLC2 pkt to: ");
 251                         for (i=0; i<6; i++)
 252                                 printf("%x ", edst[i] & 0xff);
 253                         printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n",
 254                                type & 0xff, l->llc_dsap & 0xff, l->llc_ssap &0xff,
 255                                l->llc_control & 0xff);
 256
 257                 }
 258 #endif /* LLC_DEBUG */
 259                 } break;
 260 #endif /* LLC */
 261
 262         case AF_UNSPEC:
 263         {
 264                 struct ether_header *eh;
 265                 loop_copy = -1;
 266                 eh = (struct ether_header *)dst->sa_data;
 267                 (void)memcpy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst));
 268                 if (*edst & 1)
 269                         m->m_flags |= (M_BCAST|M_MCAST);
 270                 type = eh->ether_type;
 271                 break;
 272         }
 273
 274 #if NBPFILTER > 0
 275         case AF_IMPLINK:
 276         {
 277                 fh = mtod(m, struct fddi_header *);
 278                 error = EPROTONOSUPPORT;
 279                 switch (fh->fddi_fc & (FDDIFC_C|FDDIFC_L|FDDIFC_F)) {
 280                         case FDDIFC_LLC_ASYNC: {
 281                                 /* legal priorities are 0 through 7 */
 282                                 if ((fh->fddi_fc & FDDIFC_Z) > 7)
 283                                         goto bad;
 284                                 break;
 285                         }
 286                         case FDDIFC_LLC_SYNC: {
 287                                 /* FDDIFC_Z bits reserved, must be zero */
 288                                 if (fh->fddi_fc & FDDIFC_Z)
 289                                         goto bad;
 290                                 break;
 291                         }
 292                         case FDDIFC_SMT: {
 293                                 /* FDDIFC_Z bits must be non zero */
 294                                 if ((fh->fddi_fc & FDDIFC_Z) == 0)
 295                                         goto bad;
 296                                 break;
 297                         }
 298                         default: {
 299                                 /* anything else is too dangerous */
 300                                 goto bad;
 301                         }
 302                 }
 303                 error = 0;
 304                 if (fh->fddi_dhost[0] & 1)
 305                         m->m_flags |= (M_BCAST|M_MCAST);
 306                 goto queue_it;
 307         }
 308 #endif
 309         default:
 310                 printf("%s%d: can't handle af%d\n", ifp->if_name, ifp->if_unit,
 311                         dst->sa_family);
 312                 senderr(EAFNOSUPPORT);
 313         }
 314
 315         if (type != 0) {
 316                 register struct llc *l;
 317                 M_PREPEND(m, sizeof (struct llc), M_DONTWAIT);
 318                 if (m == 0)
 319                         senderr(ENOBUFS);
 320                 l = mtod(m, struct llc *);
 321                 l->llc_control = LLC_UI;
 322                 l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP;
 323                 l->llc_snap.org_code[0] = l->llc_snap.org_code[1] = l->llc_snap.org_code[2] = 0;
 324                 (void)memcpy((caddr_t) &l->llc_snap.ether_type, (caddr_t) &type,
 325                         sizeof(u_int16_t));
 326         }
 327
 328         /*
 329          * Add local net header.  If no space in first mbuf,
 330          * allocate another.
 331          */
 332         M_PREPEND(m, sizeof (struct fddi_header), M_DONTWAIT);
 333         if (m == 0)
 334                 senderr(ENOBUFS);
 335         fh = mtod(m, struct fddi_header *);
 336         fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4;
 337         (void)memcpy((caddr_t)fh->fddi_dhost, (caddr_t)edst, sizeof (edst));
 338   queue_it:
 339         (void)memcpy((caddr_t)fh->fddi_shost, (caddr_t)ac->ac_enaddr,
 340             sizeof(fh->fddi_shost));
 341
 342         /*
 343          * If a simplex interface, and the packet is being sent to our
 344          * Ethernet address or a broadcast address, loopback a copy.
 345          * XXX To make a simplex device behave exactly like a duplex
 346          * device, we should copy in the case of sending to our own
 347          * ethernet address (thus letting the original actually appear
 348          * on the wire). However, we don't do that here for security
 349          * reasons and compatibility with the original behavior.
 350          */
 351         if ((ifp->if_flags & IFF_SIMPLEX) &&
 352            (loop_copy != -1)) {
 353                 if ((m->m_flags & M_BCAST) || loop_copy) {
 354                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
 355
 356                         (void) if_simloop(ifp,
 357                                 n, dst, sizeof(struct fddi_header));
 358                 } else if (bcmp(fh->fddi_dhost,
 359                     fh->fddi_shost, sizeof(fh->fddi_shost)) == 0) {
 360                         (void) if_simloop(ifp,
 361                                 m, dst, sizeof(struct fddi_header));
 362                         return(0);      /* XXX */
 363                 }
 364         }
 365
 366         s = splimp();
 367         /*
 368          * Queue message on interface, and start output if interface
 369          * not yet active.
 370          */
 371         if (IF_QFULL(&ifp->if_snd)) {
 372                 IF_DROP(&ifp->if_snd);
 373                 splx(s);
 374                 senderr(ENOBUFS);
 375         }
 376         ifp->if_obytes += m->m_pkthdr.len;
 377         IF_ENQUEUE(&ifp->if_snd, m);
 378         if ((ifp->if_flags & IFF_OACTIVE) == 0)
 379                 (*ifp->if_start)(ifp);
 380         splx(s);
 381         if (m->m_flags & M_MCAST)
 382                 ifp->if_omcasts++;
 383         return (error);
 384
 385 bad:
 386         if (m)
 387                 m_freem(m);
 388         return (error);
 389 }
 390
 391 /*
 392  * Process a received FDDI packet;
 393  * the packet is in the mbuf chain m without
 394  * the fddi header, which is provided separately.
 395  */
 396 void
 397 fddi_input(ifp, fh, m)
 398         struct ifnet *ifp;
 399         register struct fddi_header *fh;
 400         struct mbuf *m;
 401 {
 402         register struct ifqueue *inq;
 403         register struct llc *l;
 404         int s;
 405
 406         if ((ifp->if_flags & IFF_UP) == 0) {
 407                 m_freem(m);
 408                 return;
 409         }
 410         getmicrotime(&ifp->if_lastchange);
 411         ifp->if_ibytes += m->m_pkthdr.len + sizeof (*fh);
 412         if (fh->fddi_dhost[0] & 1) {
 413                 if (bcmp((caddr_t)fddibroadcastaddr, (caddr_t)fh->fddi_dhost,
 414                     sizeof(fddibroadcastaddr)) == 0)
 415                         m->m_flags |= M_BCAST;
 416                 else
 417                         m->m_flags |= M_MCAST;
 418                 ifp->if_imcasts++;
 419         } else if ((ifp->if_flags & IFF_PROMISC)
 420             && bcmp(((struct arpcom *)ifp)->ac_enaddr, (caddr_t)fh->fddi_dhost,
 421                     sizeof(fh->fddi_dhost)) != 0) {
 422                 m_freem(m);
 423                 return;
 424         }
 425
 426 #ifdef M_LINK0
 427         /*
 428          * If this has a LLC priority of 0, then mark it so upper
 429          * layers have a hint that it really came via a FDDI/Ethernet
 430          * bridge.
 431          */
 432         if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0)
 433                 m->m_flags |= M_LINK0;
 434 #endif
 435
 436         l = mtod(m, struct llc *);
 437         switch (l->llc_dsap) {
 438 #if defined(INET) || NS || IPX || defined(NETATALK)
 439         case LLC_SNAP_LSAP:
 440         {
 441                 u_int16_t type;
 442                 if (l->llc_control != LLC_UI || l->llc_ssap != LLC_SNAP_LSAP)
 443                         goto dropanyway;
 444
 445                 if (l->llc_snap.org_code[0] != 0 || l->llc_snap.org_code[1] != 0|| l->llc_snap.org_code[2] != 0)
 446                         goto dropanyway;
 447                 type = ntohs(l->llc_snap.ether_type);
 448                 m_adj(m, 8);
 449                 switch (type) {
 450 #if INET
 451                 case ETHERTYPE_IP:
 452                         if (ipflow_fastforward(m))
 453                                 return;
 454                         schednetisr(NETISR_IP);
 455                         inq = &ipintrq;
 456                         break;
 457
 458                 case ETHERTYPE_ARP:
 459 #if !defined(__bsdi__) || _BSDI_VERSION >= 199401
 460                         schednetisr(NETISR_ARP);
 461                         inq = &arpintrq;
 462                         break;
 463 #else
 464                         arpinput((struct arpcom *)ifp, m);
 465                         return;
 466 #endif
 467 #endif
 468 #if IPX
 469                 case ETHERTYPE_IPX:
 470                         schednetisr(NETISR_IPX);
 471                         inq = &ipxintrq;
 472                         break;
 473 #endif
 474 #if NS
 475                 case ETHERTYPE_NS:
 476                         schednetisr(NETISR_NS);
 477                         inq = &nsintrq;
 478                         break;
 479 #endif
 480 #if DECNET
 481                 case ETHERTYPE_DECNET:
 482                         schednetisr(NETISR_DECNET);
 483                         inq = &decnetintrq;
 484                         break;
 485 #endif
 486
 487                 default:
 488                         /* printf("fddi_input: unknown protocol 0x%x\n", type); */
 489                         ifp->if_noproto++;
 490                         goto dropanyway;
 491                 }
 492                 break;
 493         }
 494 #endif /* INET || NS */
 495 #if     ISO
 496         case LLC_ISO_LSAP:
 497                 switch (l->llc_control) {
 498                 case LLC_UI:
 499                         /* LLC_UI_P forbidden in class 1 service */
 500                         if ((l->llc_dsap == LLC_ISO_LSAP) &&
 501                             (l->llc_ssap == LLC_ISO_LSAP)) {
 502                                 /* LSAP for ISO */
 503                                 m->m_data += 3;         /* XXX */
 504                                 m->m_len -= 3;          /* XXX */
 505                                 m->m_pkthdr.len -= 3;   /* XXX */
 506                                 M_PREPEND(m, sizeof *fh, M_DONTWAIT);
 507                                 if (m == 0)
 508                                         return;
 509                                 *mtod(m, struct fddi_header *) = *fh;
 510                                 IFDEBUG(D_ETHER)
 511                                         printf("clnp packet");
 512                                 ENDDEBUG
 513                                 schednetisr(NETISR_ISO);
 514                                 inq = &clnlintrq;
 515                                 break;
 516                         }
 517                         goto dropanyway;
 518
 519                 case LLC_XID:
 520                 case LLC_XID_P:
 521                         if(m->m_len < 6)
 522                                 goto dropanyway;
 523                         l->llc_window = 0;
 524                         l->llc_fid = 9;
 525                         l->llc_class = 1;
 526                         l->llc_dsap = l->llc_ssap = 0;
 527                         /* Fall through to */
 528                 case LLC_TEST:
 529                 case LLC_TEST_P:
 530                 {
 531                         struct sockaddr sa;
 532                         register struct ether_header *eh;
 533                         struct arpcom *ac = (struct arpcom *) ifp;
 534                         int i;
 535                         u_char c = l->llc_dsap;
 536
 537                         l->llc_dsap = l->llc_ssap;
 538                         l->llc_ssap = c;
 539                         if (m->m_flags & (M_BCAST | M_MCAST))
 540                                 bcopy((caddr_t)ac->ac_enaddr,
 541                                       (caddr_t)eh->ether_dhost, 6);
 542                         sa.sa_family = AF_UNSPEC;
 543                         sa.sa_len = sizeof(sa);
 544                         eh = (struct ether_header *)sa.sa_data;
 545                         for (i = 0; i < 6; i++) {
 546                                 eh->ether_shost[i] = fh->fddi_dhost[i];
 547                                 eh->ether_dhost[i] = fh->fddi_shost[i];
 548                         }
 549                         eh->ether_type = 0;
 550                         ifp->if_output(ifp, m, &sa, NULL);
 551                         return;
 552                 }
 553                 default:
 554                         m_freem(m);
 555                         return;
 556                 }
 557                 break;
 558 #endif /* ISO */
 559 #if LLC
 560         case LLC_X25_LSAP:
 561         {
 562                 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT);
 563                 if (m == 0)
 564                         return;
 565                 if ( !sdl_sethdrif(ifp, fh->fddi_shost, LLC_X25_LSAP,
 566                                     fh->fddi_dhost, LLC_X25_LSAP, 6,
 567                                     mtod(m, struct sdl_hdr *)))
 568                         panic("ETHER cons addr failure");
 569                 mtod(m, struct sdl_hdr *)->sdlhdr_len = m->m_pkthdr.len - sizeof(struct sdl_hdr);
 570 #if LLC_DEBUG
 571                 printf("llc packet\n");
 572 #endif /* LLC_DEBUG */
 573                 schednetisr(NETISR_CCITT);
 574                 inq = &llcintrq;
 575                 break;
 576         }
 577 #endif /* LLC */
 578
 579         default:
 580                 /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */
 581                 ifp->if_noproto++;
 582         dropanyway:
 583                 m_freem(m);
 584                 return;
 585         }
 586
 587         s = splimp();
 588         if (IF_QFULL(inq)) {
 589                 IF_DROP(inq);
 590                 m_freem(m);
 591         } else
 592                 IF_ENQUEUE(inq, m);
 593         splx(s);
 594 }
 595 /*
 596  * Perform common duties while attaching to interface list
 597  */
 598 #ifdef __NetBSD__
 599 #define ifa_next        ifa_list.tqe_next
 600 #endif
 601
 602 void
 603 fddi_ifattach(ifp)
 604         register struct ifnet *ifp;
 605 {
 606         register struct ifaddr *ifa;
 607         register struct sockaddr_dl *sdl;
 608
 609         ifp->if_type = IFT_FDDI;
 610         ifp->if_addrlen = 6;
 611         ifp->if_hdrlen = 21;
 612         ifp->if_mtu = FDDIMTU;
 613         ifp->if_baudrate = 100000000;
 614 #if IFF_NOTRAILERS
 615         ifp->if_flags |= IFF_NOTRAILERS;
 616 #endif
 617 #if defined(__FreeBSD__)
 618         ifa = ifnet_addrs[ifp->if_index - 1];
 619         sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 620         sdl->sdl_type = IFT_FDDI;
 621         sdl->sdl_alen = ifp->if_addrlen;
 622         bcopy(((struct arpcom *)ifp)->ac_enaddr, LLADDR(sdl), ifp->if_addrlen);
 623 #elif defined(__NetBSD__)
 624         LIST_INIT(&((struct arpcom *)ifp)->ac_multiaddrs);
 625         for (ifa = ifp->if_addrlist.tqh_first; ifa != NULL; ifa = ifa->ifa_list.tqe_next)
 626 #else
 627         for (ifa = ifp->if_addrlist; ifa != NULL; ifa = ifa->ifa_next)
 628 #endif
 629 #if !defined(__FreeBSD__)
 630                 if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
 631                     sdl->sdl_family == AF_LINK) {
 632                         sdl->sdl_type = IFT_FDDI;
 633                         sdl->sdl_alen = ifp->if_addrlen;
 634                         bcopy((caddr_t)((struct arpcom *)ifp)->ac_enaddr,
 635                               LLADDR(sdl), ifp->if_addrlen);
 636                         break;
 637                 }
 638 #endif
 639 }