sys/net/if_fwsubr.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2004 Doug Rabson
   5  * Copyright (c) 1982, 1989, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include "opt_inet.h"
  34 #include "opt_inet6.h"
  35
  36 #include <sys/param.h>
  37 #include <sys/systm.h>
  38 #include <sys/kernel.h>
  39 #include <sys/malloc.h>
  40 #include <sys/mbuf.h>
  41 #include <sys/module.h>
  42 #include <sys/socket.h>
  43 #include <sys/sockio.h>
  44
  45 #include <net/if.h>
  46 #include <net/if_var.h>
  47 #include <net/if_private.h>
  48 #include <net/netisr.h>
  49 #include <net/route.h>
  50 #include <net/if_llc.h>
  51 #include <net/if_dl.h>
  52 #include <net/if_types.h>
  53 #include <net/bpf.h>
  54 #include <net/firewire.h>
  55 #include <net/if_llatbl.h>
  56
  57 #if defined(INET) || defined(INET6)
  58 #include <netinet/in.h>
  59 #include <netinet/in_var.h>
  60 #include <netinet/if_ether.h>
  61 #endif
  62 #ifdef INET6
  63 #include <netinet6/nd6.h>
  64 #endif
  65
  66 #include <security/mac/mac_framework.h>
  67
  68 static MALLOC_DEFINE(M_FWCOM, "fw_com", "firewire interface internals");
  69
  70 struct fw_hwaddr firewire_broadcastaddr = {
  71         0xffffffff,
  72         0xffffffff,
  73         0xff,
  74         0xff,
  75         0xffff,
  76         0xffffffff
  77 };
  78
  79 static int
  80 firewire_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
  81     struct route *ro)
  82 {
  83         struct fw_com *fc = IFP2FWC(ifp);
  84         int error, type;
  85         struct m_tag *mtag;
  86         union fw_encap *enc;
  87         struct fw_hwaddr *destfw;
  88         uint8_t speed;
  89         uint16_t psize, fsize, dsize;
  90         struct mbuf *mtail;
  91         int unicast, dgl, foff;
  92         static int next_dgl;
  93 #if defined(INET) || defined(INET6)
  94         int is_gw = 0;
  95 #endif
  96         int af = RO_GET_FAMILY(ro, dst);
  97
  98 #ifdef MAC
  99         error = mac_ifnet_check_transmit(ifp, m);
 100         if (error)
 101                 goto bad;
 102 #endif
 103
 104         if (!((ifp->if_flags & IFF_UP) &&
 105            (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
 106                 error = ENETDOWN;
 107                 goto bad;
 108         }
 109
 110 #if defined(INET) || defined(INET6)
 111         if (ro != NULL)
 112                 is_gw = (ro->ro_flags & RT_HAS_GW) != 0;
 113 #endif
 114         /*
 115          * For unicast, we make a tag to store the lladdr of the
 116          * destination. This might not be the first time we have seen
 117          * the packet (for instance, the arp code might be trying to
 118          * re-send it after receiving an arp reply) so we only
 119          * allocate a tag if there isn't one there already. For
 120          * multicast, we will eventually use a different tag to store
 121          * the channel number.
 122          */
 123         unicast = !(m->m_flags & (M_BCAST | M_MCAST));
 124         if (unicast) {
 125                 mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, NULL);
 126                 if (!mtag) {
 127                         mtag = m_tag_alloc(MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR,
 128                             sizeof (struct fw_hwaddr), M_NOWAIT);
 129                         if (!mtag) {
 130                                 error = ENOMEM;
 131                                 goto bad;
 132                         }
 133                         m_tag_prepend(m, mtag);
 134                 }
 135                 destfw = (struct fw_hwaddr *)(mtag + 1);
 136         } else {
 137                 destfw = NULL;
 138         }
 139
 140         switch (af) {
 141 #ifdef INET
 142         case AF_INET:
 143                 type = ETHERTYPE_IP;
 144                 break;
 145         case AF_ARP:
 146                 type = ETHERTYPE_ARP;
 147                 break;
 148 #endif
 149 #ifdef INET6
 150         case AF_INET6:
 151                 type = ETHERTYPE_IPV6;
 152                 break;
 153 #endif
 154         default:
 155                 if_printf(ifp, "can't handle af%d\n", af);
 156                 error = EAFNOSUPPORT;
 157                 goto bad;
 158         }
 159
 160         switch (dst->sa_family) {
 161 #ifdef INET
 162         case AF_INET:
 163                 /*
 164                  * Only bother with arp for unicast. Allocation of
 165                  * channels etc. for firewire is quite different and
 166                  * doesn't fit into the arp model.
 167                  */
 168                 if (unicast) {
 169                         error = arpresolve(ifp, is_gw, m, dst,
 170                             (u_char *) destfw, NULL, NULL);
 171                         if (error)
 172                                 return (error == EWOULDBLOCK ? 0 : error);
 173                 }
 174                 break;
 175
 176         case AF_ARP:
 177         {
 178                 struct arphdr *ah;
 179                 ah = mtod(m, struct arphdr *);
 180                 ah->ar_hrd = htons(ARPHRD_IEEE1394);
 181                 if (unicast)
 182                         *destfw = *(struct fw_hwaddr *) ar_tha(ah);
 183
 184                 /*
 185                  * The standard arp code leaves a hole for the target
 186                  * hardware address which we need to close up.
 187                  */
 188                 bcopy(ar_tpa(ah), ar_tha(ah), ah->ar_pln);
 189                 m_adj(m, -ah->ar_hln);
 190                 break;
 191         }
 192 #endif
 193
 194 #ifdef INET6
 195         case AF_INET6:
 196                 if (unicast) {
 197                         error = nd6_resolve(fc->fc_ifp, LLE_SF(af, is_gw), m,
 198                             dst, (u_char *) destfw, NULL, NULL);
 199                         if (error)
 200                                 return (error == EWOULDBLOCK ? 0 : error);
 201                 }
 202                 break;
 203 #endif
 204
 205         default:
 206                 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
 207                 error = EAFNOSUPPORT;
 208                 goto bad;
 209         }
 210
 211         /*
 212          * Let BPF tap off a copy before we encapsulate.
 213          */
 214         if (bpf_peers_present(ifp->if_bpf)) {
 215                 struct fw_bpfhdr h;
 216                 if (unicast)
 217                         bcopy(destfw, h.firewire_dhost, 8);
 218                 else
 219                         bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8);
 220                 bcopy(&fc->fc_hwaddr, h.firewire_shost, 8);
 221                 h.firewire_type = htons(type);
 222                 bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m);
 223         }
 224
 225         /*
 226          * Punt on MCAP for now and send all multicast packets on the
 227          * broadcast channel.
 228          */
 229         if (m->m_flags & M_MCAST)
 230                 m->m_flags |= M_BCAST;
 231
 232         /*
 233          * Figure out what speed to use and what the largest supported
 234          * packet size is. For unicast, this is the minimum of what we
 235          * can speak and what they can hear. For broadcast, lets be
 236          * conservative and use S100. We could possibly improve that
 237          * by examining the bus manager's speed map or similar. We
 238          * also reduce the packet size for broadcast to account for
 239          * the GASP header.
 240          */
 241         if (unicast) {
 242                 speed = min(fc->fc_speed, destfw->sspd);
 243                 psize = min(512 << speed, 2 << destfw->sender_max_rec);
 244         } else {
 245                 speed = 0;
 246                 psize = 512 - 2*sizeof(uint32_t);
 247         }
 248
 249         /*
 250          * Next, we encapsulate, possibly fragmenting the original
 251          * datagram if it won't fit into a single packet.
 252          */
 253         if (m->m_pkthdr.len <= psize - sizeof(uint32_t)) {
 254                 /*
 255                  * No fragmentation is necessary.
 256                  */
 257                 M_PREPEND(m, sizeof(uint32_t), M_NOWAIT);
 258                 if (!m) {
 259                         error = ENOBUFS;
 260                         goto bad;
 261                 }
 262                 enc = mtod(m, union fw_encap *);
 263                 enc->unfrag.ether_type = type;
 264                 enc->unfrag.lf = FW_ENCAP_UNFRAG;
 265                 enc->unfrag.reserved = 0;
 266
 267                 /*
 268                  * Byte swap the encapsulation header manually.
 269                  */
 270                 enc->ul[0] = htonl(enc->ul[0]);
 271
 272                 error = (ifp->if_transmit)(ifp, m);
 273                 return (error);
 274         } else {
 275                 /*
 276                  * Fragment the datagram, making sure to leave enough
 277                  * space for the encapsulation header in each packet.
 278                  */
 279                 fsize = psize - 2*sizeof(uint32_t);
 280                 dgl = next_dgl++;
 281                 dsize = m->m_pkthdr.len;
 282                 foff = 0;
 283                 while (m) {
 284                         if (m->m_pkthdr.len > fsize) {
 285                                 /*
 286                                  * Split off the tail segment from the
 287                                  * datagram, copying our tags over.
 288                                  */
 289                                 mtail = m_split(m, fsize, M_NOWAIT);
 290                                 m_tag_copy_chain(mtail, m, M_NOWAIT);
 291                         } else {
 292                                 mtail = NULL;
 293                         }
 294
 295                         /*
 296                          * Add our encapsulation header to this
 297                          * fragment and hand it off to the link.
 298                          */
 299                         M_PREPEND(m, 2*sizeof(uint32_t), M_NOWAIT);
 300                         if (!m) {
 301                                 error = ENOBUFS;
 302                                 goto bad;
 303                         }
 304                         enc = mtod(m, union fw_encap *);
 305                         if (foff == 0) {
 306                                 enc->firstfrag.lf = FW_ENCAP_FIRST;
 307                                 enc->firstfrag.reserved1 = 0;
 308                                 enc->firstfrag.reserved2 = 0;
 309                                 enc->firstfrag.datagram_size = dsize - 1;
 310                                 enc->firstfrag.ether_type = type;
 311                                 enc->firstfrag.dgl = dgl;
 312                         } else {
 313                                 if (mtail)
 314                                         enc->nextfrag.lf = FW_ENCAP_NEXT;
 315                                 else
 316                                         enc->nextfrag.lf = FW_ENCAP_LAST;
 317                                 enc->nextfrag.reserved1 = 0;
 318                                 enc->nextfrag.reserved2 = 0;
 319                                 enc->nextfrag.reserved3 = 0;
 320                                 enc->nextfrag.datagram_size = dsize - 1;
 321                                 enc->nextfrag.fragment_offset = foff;
 322                                 enc->nextfrag.dgl = dgl;
 323                         }
 324                         foff += m->m_pkthdr.len - 2*sizeof(uint32_t);
 325
 326                         /*
 327                          * Byte swap the encapsulation header manually.
 328                          */
 329                         enc->ul[0] = htonl(enc->ul[0]);
 330                         enc->ul[1] = htonl(enc->ul[1]);
 331
 332                         error = (ifp->if_transmit)(ifp, m);
 333                         if (error) {
 334                                 if (mtail)
 335                                         m_freem(mtail);
 336                                 return (ENOBUFS);
 337                         }
 338
 339                         m = mtail;
 340                 }
 341
 342                 return (0);
 343         }
 344
 345 bad:
 346         if (m)
 347                 m_freem(m);
 348         return (error);
 349 }
 350
 351 static struct mbuf *
 352 firewire_input_fragment(struct fw_com *fc, struct mbuf *m, int src)
 353 {
 354         union fw_encap *enc;
 355         struct fw_reass *r;
 356         struct mbuf *mf, *mprev;
 357         int dsize;
 358         int fstart, fend, start, end, islast;
 359         uint32_t id;
 360
 361         /*
 362          * Find an existing reassembly buffer or create a new one.
 363          */
 364         enc = mtod(m, union fw_encap *);
 365         id = enc->firstfrag.dgl | (src << 16);
 366         STAILQ_FOREACH(r, &fc->fc_frags, fr_link)
 367                 if (r->fr_id == id)
 368                         break;
 369         if (!r) {
 370                 r = malloc(sizeof(struct fw_reass), M_TEMP, M_NOWAIT);
 371                 if (!r) {
 372                         m_freem(m);
 373                         return 0;
 374                 }
 375                 r->fr_id = id;
 376                 r->fr_frags = 0;
 377                 STAILQ_INSERT_HEAD(&fc->fc_frags, r, fr_link);
 378         }
 379
 380         /*
 381          * If this fragment overlaps any other fragment, we must discard
 382          * the partial reassembly and start again.
 383          */
 384         if (enc->firstfrag.lf == FW_ENCAP_FIRST)
 385                 fstart = 0;
 386         else
 387                 fstart = enc->nextfrag.fragment_offset;
 388         fend = fstart + m->m_pkthdr.len - 2*sizeof(uint32_t);
 389         dsize = enc->nextfrag.datagram_size;
 390         islast = (enc->nextfrag.lf == FW_ENCAP_LAST);
 391
 392         for (mf = r->fr_frags; mf; mf = mf->m_nextpkt) {
 393                 enc = mtod(mf, union fw_encap *);
 394                 if (enc->nextfrag.datagram_size != dsize) {
 395                         /*
 396                          * This fragment must be from a different
 397                          * packet.
 398                          */
 399                         goto bad;
 400                 }
 401                 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
 402                         start = 0;
 403                 else
 404                         start = enc->nextfrag.fragment_offset;
 405                 end = start + mf->m_pkthdr.len - 2*sizeof(uint32_t);
 406                 if ((fstart < end && fend > start) ||
 407                     (islast && enc->nextfrag.lf == FW_ENCAP_LAST)) {
 408                         /*
 409                          * Overlap - discard reassembly buffer and start
 410                          * again with this fragment.
 411                          */
 412                         goto bad;
 413                 }
 414         }
 415
 416         /*
 417          * Find where to put this fragment in the list.
 418          */
 419         for (mf = r->fr_frags, mprev = NULL; mf;
 420             mprev = mf, mf = mf->m_nextpkt) {
 421                 enc = mtod(mf, union fw_encap *);
 422                 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
 423                         start = 0;
 424                 else
 425                         start = enc->nextfrag.fragment_offset;
 426                 if (start >= fend)
 427                         break;
 428         }
 429
 430         /*
 431          * If this is a last fragment and we are not adding at the end
 432          * of the list, discard the buffer.
 433          */
 434         if (islast && mprev && mprev->m_nextpkt)
 435                 goto bad;
 436
 437         if (mprev) {
 438                 m->m_nextpkt = mprev->m_nextpkt;
 439                 mprev->m_nextpkt = m;
 440
 441                 /*
 442                  * Coalesce forwards and see if we can make a whole
 443                  * datagram.
 444                  */
 445                 enc = mtod(mprev, union fw_encap *);
 446                 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
 447                         start = 0;
 448                 else
 449                         start = enc->nextfrag.fragment_offset;
 450                 end = start + mprev->m_pkthdr.len - 2*sizeof(uint32_t);
 451                 while (end == fstart) {
 452                         /*
 453                          * Strip off the encap header from m and
 454                          * append it to mprev, freeing m.
 455                          */
 456                         m_adj(m, 2*sizeof(uint32_t));
 457                         mprev->m_nextpkt = m->m_nextpkt;
 458                         mprev->m_pkthdr.len += m->m_pkthdr.len;
 459                         m_cat(mprev, m);
 460
 461                         if (mprev->m_pkthdr.len == dsize + 1 + 2*sizeof(uint32_t)) {
 462                                 /*
 463                                  * We have assembled a complete packet
 464                                  * we must be finished. Make sure we have
 465                                  * merged the whole chain.
 466                                  */
 467                                 STAILQ_REMOVE(&fc->fc_frags, r, fw_reass, fr_link);
 468                                 free(r, M_TEMP);
 469                                 m = mprev->m_nextpkt;
 470                                 while (m) {
 471                                         mf = m->m_nextpkt;
 472                                         m_freem(m);
 473                                         m = mf;
 474                                 }
 475                                 mprev->m_nextpkt = NULL;
 476
 477                                 return (mprev);
 478                         }
 479
 480                         /*
 481                          * See if we can continue merging forwards.
 482                          */
 483                         end = fend;
 484                         m = mprev->m_nextpkt;
 485                         if (m) {
 486                                 enc = mtod(m, union fw_encap *);
 487                                 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
 488                                         fstart = 0;
 489                                 else
 490                                         fstart = enc->nextfrag.fragment_offset;
 491                                 fend = fstart + m->m_pkthdr.len
 492                                     - 2*sizeof(uint32_t);
 493                         } else {
 494                                 break;
 495                         }
 496                 }
 497         } else {
 498                 m->m_nextpkt = 0;
 499                 r->fr_frags = m;
 500         }
 501
 502         return (0);
 503
 504 bad:
 505         while (r->fr_frags) {
 506                 mf = r->fr_frags;
 507                 r->fr_frags = mf->m_nextpkt;
 508                 m_freem(mf);
 509         }
 510         m->m_nextpkt = 0;
 511         r->fr_frags = m;
 512
 513         return (0);
 514 }
 515
 516 void
 517 firewire_input(struct ifnet *ifp, struct mbuf *m, uint16_t src)
 518 {
 519         struct fw_com *fc = IFP2FWC(ifp);
 520         union fw_encap *enc;
 521         int type, isr;
 522
 523         /*
 524          * The caller has already stripped off the packet header
 525          * (stream or wreqb) and marked the mbuf's M_BCAST flag
 526          * appropriately. We de-encapsulate the IP packet and pass it
 527          * up the line after handling link-level fragmentation.
 528          */
 529         if (m->m_pkthdr.len < sizeof(uint32_t)) {
 530                 if_printf(ifp, "discarding frame without "
 531                     "encapsulation header (len %u pkt len %u)\n",
 532                     m->m_len, m->m_pkthdr.len);
 533         }
 534
 535         m = m_pullup(m, sizeof(uint32_t));
 536         if (m == NULL)
 537                 return;
 538         enc = mtod(m, union fw_encap *);
 539
 540         /*
 541          * Byte swap the encapsulation header manually.
 542          */
 543         enc->ul[0] = ntohl(enc->ul[0]);
 544
 545         if (enc->unfrag.lf != 0) {
 546                 m = m_pullup(m, 2*sizeof(uint32_t));
 547                 if (!m)
 548                         return;
 549                 enc = mtod(m, union fw_encap *);
 550                 enc->ul[1] = ntohl(enc->ul[1]);
 551                 m = firewire_input_fragment(fc, m, src);
 552                 if (!m)
 553                         return;
 554                 enc = mtod(m, union fw_encap *);
 555                 type = enc->firstfrag.ether_type;
 556                 m_adj(m, 2*sizeof(uint32_t));
 557         } else {
 558                 type = enc->unfrag.ether_type;
 559                 m_adj(m, sizeof(uint32_t));
 560         }
 561
 562         if (m->m_pkthdr.rcvif == NULL) {
 563                 if_printf(ifp, "discard frame w/o interface pointer\n");
 564                 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
 565                 m_freem(m);
 566                 return;
 567         }
 568 #ifdef DIAGNOSTIC
 569         if (m->m_pkthdr.rcvif != ifp) {
 570                 if_printf(ifp, "Warning, frame marked as received on %s\n",
 571                         m->m_pkthdr.rcvif->if_xname);
 572         }
 573 #endif
 574
 575 #ifdef MAC
 576         /*
 577          * Tag the mbuf with an appropriate MAC label before any other
 578          * consumers can get to it.
 579          */
 580         mac_ifnet_create_mbuf(ifp, m);
 581 #endif
 582
 583         /*
 584          * Give bpf a chance at the packet. The link-level driver
 585          * should have left us a tag with the EUID of the sender.
 586          */
 587         if (bpf_peers_present(ifp->if_bpf)) {
 588                 struct fw_bpfhdr h;
 589                 struct m_tag *mtag;
 590
 591                 mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_SENDER_EUID, 0);
 592                 if (mtag)
 593                         bcopy(mtag + 1, h.firewire_shost, 8);
 594                 else
 595                         bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8);
 596                 bcopy(&fc->fc_hwaddr, h.firewire_dhost, 8);
 597                 h.firewire_type = htons(type);
 598                 bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m);
 599         }
 600
 601         if (ifp->if_flags & IFF_MONITOR) {
 602                 /*
 603                  * Interface marked for monitoring; discard packet.
 604                  */
 605                 m_freem(m);
 606                 return;
 607         }
 608
 609         if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
 610
 611         /* Discard packet if interface is not up */
 612         if ((ifp->if_flags & IFF_UP) == 0) {
 613                 m_freem(m);
 614                 return;
 615         }
 616
 617         if (m->m_flags & (M_BCAST|M_MCAST))
 618                 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
 619
 620         switch (type) {
 621 #ifdef INET
 622         case ETHERTYPE_IP:
 623                 isr = NETISR_IP;
 624                 break;
 625
 626         case ETHERTYPE_ARP:
 627         {
 628                 struct arphdr *ah;
 629                 ah = mtod(m, struct arphdr *);
 630
 631                 /*
 632                  * Adjust the arp packet to insert an empty tha slot.
 633                  */
 634                 m->m_len += ah->ar_hln;
 635                 m->m_pkthdr.len += ah->ar_hln;
 636                 bcopy(ar_tha(ah), ar_tpa(ah), ah->ar_pln);
 637                 isr = NETISR_ARP;
 638                 break;
 639         }
 640 #endif
 641
 642 #ifdef INET6
 643         case ETHERTYPE_IPV6:
 644                 isr = NETISR_IPV6;
 645                 break;
 646 #endif
 647
 648         default:
 649                 m_freem(m);
 650                 return;
 651         }
 652
 653         M_SETFIB(m, ifp->if_fib);
 654         CURVNET_SET_QUIET(ifp->if_vnet);
 655         netisr_dispatch(isr, m);
 656         CURVNET_RESTORE();
 657 }
 658
 659 int
 660 firewire_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
 661 {
 662         struct ifaddr *ifa = (struct ifaddr *) data;
 663         struct ifreq *ifr = (struct ifreq *) data;
 664         int error = 0;
 665
 666         switch (command) {
 667         case SIOCSIFADDR:
 668                 ifp->if_flags |= IFF_UP;
 669
 670                 switch (ifa->ifa_addr->sa_family) {
 671 #ifdef INET
 672                 case AF_INET:
 673                         ifp->if_init(ifp->if_softc);    /* before arpwhohas */
 674                         arp_ifinit(ifp, ifa);
 675                         break;
 676 #endif
 677                 default:
 678                         ifp->if_init(ifp->if_softc);
 679                         break;
 680                 }
 681                 break;
 682
 683         case SIOCGIFADDR:
 684                 bcopy(&IFP2FWC(ifp)->fc_hwaddr, &ifr->ifr_addr.sa_data[0],
 685                     sizeof(struct fw_hwaddr));
 686                 break;
 687
 688         case SIOCSIFMTU:
 689                 /*
 690                  * Set the interface MTU.
 691                  */
 692                 if (ifr->ifr_mtu > 1500) {
 693                         error = EINVAL;
 694                 } else {
 695                         ifp->if_mtu = ifr->ifr_mtu;
 696                 }
 697                 break;
 698         default:
 699                 error = EINVAL;                 /* XXX netbsd has ENOTTY??? */
 700                 break;
 701         }
 702         return (error);
 703 }
 704
 705 static int
 706 firewire_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa,
 707     struct sockaddr *sa)
 708 {
 709 #ifdef INET
 710         struct sockaddr_in *sin;
 711 #endif
 712 #ifdef INET6
 713         struct sockaddr_in6 *sin6;
 714 #endif
 715
 716         switch(sa->sa_family) {
 717         case AF_LINK:
 718                 /*
 719                  * No mapping needed.
 720                  */
 721                 *llsa = NULL;
 722                 return 0;
 723
 724 #ifdef INET
 725         case AF_INET:
 726                 sin = (struct sockaddr_in *)sa;
 727                 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
 728                         return EADDRNOTAVAIL;
 729                 *llsa = NULL;
 730                 return 0;
 731 #endif
 732 #ifdef INET6
 733         case AF_INET6:
 734                 sin6 = (struct sockaddr_in6 *)sa;
 735                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 736                         /*
 737                          * An IP6 address of 0 means listen to all
 738                          * of the Ethernet multicast address used for IP6.
 739                          * (This is used for multicast routers.)
 740                          */
 741                         ifp->if_flags |= IFF_ALLMULTI;
 742                         *llsa = NULL;
 743                         return 0;
 744                 }
 745                 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
 746                         return EADDRNOTAVAIL;
 747                 *llsa = NULL;
 748                 return 0;
 749 #endif
 750
 751         default:
 752                 /*
 753                  * Well, the text isn't quite right, but it's the name
 754                  * that counts...
 755                  */
 756                 return EAFNOSUPPORT;
 757         }
 758 }
 759
 760 void
 761 firewire_ifattach(struct ifnet *ifp, struct fw_hwaddr *llc)
 762 {
 763         struct fw_com *fc = IFP2FWC(ifp);
 764         struct ifaddr *ifa;
 765         struct sockaddr_dl *sdl;
 766         static const char* speeds[] = {
 767                 "S100", "S200", "S400", "S800",
 768                 "S1600", "S3200"
 769         };
 770
 771         fc->fc_speed = llc->sspd;
 772         STAILQ_INIT(&fc->fc_frags);
 773
 774         ifp->if_addrlen = sizeof(struct fw_hwaddr);
 775         ifp->if_hdrlen = 0;
 776         if_attach(ifp);
 777         ifp->if_mtu = 1500;     /* XXX */
 778         ifp->if_output = firewire_output;
 779         ifp->if_resolvemulti = firewire_resolvemulti;
 780         ifp->if_broadcastaddr = (u_char *) &firewire_broadcastaddr;
 781
 782         ifa = ifp->if_addr;
 783         KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
 784         sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 785         sdl->sdl_type = IFT_IEEE1394;
 786         sdl->sdl_alen = ifp->if_addrlen;
 787         bcopy(llc, LLADDR(sdl), ifp->if_addrlen);
 788
 789         bpfattach(ifp, DLT_APPLE_IP_OVER_IEEE1394,
 790             sizeof(struct fw_hwaddr));
 791
 792         if_printf(ifp, "Firewire address: %8D @ 0x%04x%08x, %s, maxrec %d\n",
 793             (uint8_t *) &llc->sender_unique_ID_hi, ":",
 794             ntohs(llc->sender_unicast_FIFO_hi),
 795             ntohl(llc->sender_unicast_FIFO_lo),
 796             speeds[llc->sspd],
 797             (2 << llc->sender_max_rec));
 798 }
 799
 800 void
 801 firewire_ifdetach(struct ifnet *ifp)
 802 {
 803         bpfdetach(ifp);
 804         if_detach(ifp);
 805         NET_EPOCH_DRAIN_CALLBACKS();
 806 }
 807
 808 void
 809 firewire_busreset(struct ifnet *ifp)
 810 {
 811         struct fw_com *fc = IFP2FWC(ifp);
 812         struct fw_reass *r;
 813         struct mbuf *m;
 814
 815         /*
 816          * Discard any partial datagrams since the host ids may have changed.
 817          */
 818         while ((r = STAILQ_FIRST(&fc->fc_frags))) {
 819                 STAILQ_REMOVE_HEAD(&fc->fc_frags, fr_link);
 820                 while (r->fr_frags) {
 821                         m = r->fr_frags;
 822                         r->fr_frags = m->m_nextpkt;
 823                         m_freem(m);
 824                 }
 825                 free(r, M_TEMP);
 826         }
 827 }
 828
 829 static void *
 830 firewire_alloc(u_char type, struct ifnet *ifp)
 831 {
 832         struct fw_com   *fc;
 833
 834         fc = malloc(sizeof(struct fw_com), M_FWCOM, M_WAITOK | M_ZERO);
 835         fc->fc_ifp = ifp;
 836
 837         return (fc);
 838 }
 839
 840 static void
 841 firewire_free(void *com, u_char type)
 842 {
 843
 844         free(com, M_FWCOM);
 845 }
 846
 847 static int
 848 firewire_modevent(module_t mod, int type, void *data)
 849 {
 850
 851         switch (type) {
 852         case MOD_LOAD:
 853                 if_register_com_alloc(IFT_IEEE1394,
 854                     firewire_alloc, firewire_free);
 855                 break;
 856         case MOD_UNLOAD:
 857                 if_deregister_com_alloc(IFT_IEEE1394);
 858                 break;
 859         default:
 860                 return (EOPNOTSUPP);
 861         }
 862
 863         return (0);
 864 }
 865
 866 static moduledata_t firewire_mod = {
 867         "if_firewire",
 868         firewire_modevent,
 869         0
 870 };
 871
 872 DECLARE_MODULE(if_firewire, firewire_mod, SI_SUB_INIT_IF, SI_ORDER_ANY);
 873 MODULE_VERSION(if_firewire, 1);