if_fwsubr.c revision 163606
1/*- 2 * Copyright (c) 2004 Doug Rabson 3 * Copyright (c) 1982, 1989, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 4. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD: head/sys/net/if_fwsubr.c 163606 2006-10-22 11:52:19Z rwatson $ 31 */ 32 33#include "opt_inet.h" 34#include "opt_inet6.h" 35#include "opt_mac.h" 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/kernel.h> 40#include <sys/malloc.h> 41#include <sys/mbuf.h> 42#include <sys/module.h> 43#include <sys/socket.h> 44#include <sys/sockio.h> 45 46#include <net/if.h> 47#include <net/netisr.h> 48#include <net/route.h> 49#include <net/if_llc.h> 50#include <net/if_dl.h> 51#include <net/if_types.h> 52#include <net/bpf.h> 53#include <net/firewire.h> 54 55#if defined(INET) || defined(INET6) 56#include <netinet/in.h> 57#include <netinet/in_var.h> 58#include <netinet/if_ether.h> 59#endif 60#ifdef INET6 61#include <netinet6/nd6.h> 62#endif 63 64#include <security/mac/mac_framework.h> 65 66MALLOC_DEFINE(M_FWCOM, "fw_com", "firewire interface internals"); 67 68struct fw_hwaddr firewire_broadcastaddr = { 69 0xffffffff, 70 0xffffffff, 71 0xff, 72 0xff, 73 0xffff, 74 0xffffffff 75}; 76 77static int 78firewire_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, 79 struct rtentry *rt0) 80{ 81 struct fw_com *fc = IFP2FWC(ifp); 82 int error, type; 83 struct rtentry *rt = NULL; 84 struct m_tag *mtag; 85 union fw_encap *enc; 86 struct fw_hwaddr *destfw; 87 uint8_t speed; 88 uint16_t psize, fsize, dsize; 89 struct mbuf *mtail; 90 int unicast, dgl, foff; 91 static int next_dgl; 92 93#ifdef MAC 94 error = mac_check_ifnet_transmit(ifp, m); 95 if (error) 96 goto bad; 97#endif 98 99 if (!((ifp->if_flags & IFF_UP) && 100 (ifp->if_drv_flags & IFF_DRV_RUNNING))) { 101 error = ENETDOWN; 102 goto bad; 103 } 104 105 if (rt0 != NULL) { 106 error = rt_check(&rt, &rt0, dst); 107 if (error) 108 goto bad; 109 RT_UNLOCK(rt); 110 } 111 112 /* 113 * For unicast, we make a tag to store the lladdr of the 114 * destination. This might not be the first time we have seen 115 * the packet (for instance, the arp code might be trying to 116 * re-send it after receiving an arp reply) so we only 117 * allocate a tag if there isn't one there already. For 118 * multicast, we will eventually use a different tag to store 119 * the channel number. 120 */ 121 unicast = !(m->m_flags & (M_BCAST | M_MCAST)); 122 if (unicast) { 123 mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, NULL); 124 if (!mtag) { 125 mtag = m_tag_alloc(MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, 126 sizeof (struct fw_hwaddr), M_NOWAIT); 127 if (!mtag) { 128 error = ENOMEM; 129 goto bad; 130 } 131 m_tag_prepend(m, mtag); 132 } 133 destfw = (struct fw_hwaddr *)(mtag + 1); 134 } else { 135 destfw = 0; 136 } 137 138 switch (dst->sa_family) { 139#ifdef AF_INET 140 case AF_INET: 141 /* 142 * Only bother with arp for unicast. Allocation of 143 * channels etc. for firewire is quite different and 144 * doesn't fit into the arp model. 145 */ 146 if (unicast) { 147 error = arpresolve(ifp, rt, m, dst, (u_char *) destfw); 148 if (error) 149 return (error == EWOULDBLOCK ? 0 : error); 150 } 151 type = ETHERTYPE_IP; 152 break; 153 154 case AF_ARP: 155 { 156 struct arphdr *ah; 157 ah = mtod(m, struct arphdr *); 158 ah->ar_hrd = htons(ARPHRD_IEEE1394); 159 type = ETHERTYPE_ARP; 160 if (unicast) 161 *destfw = *(struct fw_hwaddr *) ar_tha(ah); 162 163 /* 164 * The standard arp code leaves a hole for the target 165 * hardware address which we need to close up. 166 */ 167 bcopy(ar_tpa(ah), ar_tha(ah), ah->ar_pln); 168 m_adj(m, -ah->ar_hln); 169 break; 170 } 171#endif 172 173#ifdef INET6 174 case AF_INET6: 175 if (unicast) { 176 error = nd6_storelladdr(fc->fc_ifp, rt, m, dst, 177 (u_char *) destfw); 178 if (error) 179 return (error); 180 } 181 type = ETHERTYPE_IPV6; 182 break; 183#endif 184 185 default: 186 if_printf(ifp, "can't handle af%d\n", dst->sa_family); 187 error = EAFNOSUPPORT; 188 goto bad; 189 } 190 191 /* 192 * Let BPF tap off a copy before we encapsulate. 193 */ 194 if (bpf_peers_present(ifp->if_bpf)) { 195 struct fw_bpfhdr h; 196 if (unicast) 197 bcopy(destfw, h.firewire_dhost, 8); 198 else 199 bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8); 200 bcopy(&fc->fc_hwaddr, h.firewire_shost, 8); 201 h.firewire_type = htons(type); 202 bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m); 203 } 204 205 /* 206 * Punt on MCAP for now and send all multicast packets on the 207 * broadcast channel. 208 */ 209 if (m->m_flags & M_MCAST) 210 m->m_flags |= M_BCAST; 211 212 /* 213 * Figure out what speed to use and what the largest supported 214 * packet size is. For unicast, this is the minimum of what we 215 * can speak and what they can hear. For broadcast, lets be 216 * conservative and use S100. We could possibly improve that 217 * by examining the bus manager's speed map or similar. We 218 * also reduce the packet size for broadcast to account for 219 * the GASP header. 220 */ 221 if (unicast) { 222 speed = min(fc->fc_speed, destfw->sspd); 223 psize = min(512 << speed, 2 << destfw->sender_max_rec); 224 } else { 225 speed = 0; 226 psize = 512 - 2*sizeof(uint32_t); 227 } 228 229 /* 230 * Next, we encapsulate, possibly fragmenting the original 231 * datagram if it won't fit into a single packet. 232 */ 233 if (m->m_pkthdr.len <= psize - sizeof(uint32_t)) { 234 /* 235 * No fragmentation is necessary. 236 */ 237 M_PREPEND(m, sizeof(uint32_t), M_DONTWAIT); 238 if (!m) { 239 error = ENOBUFS; 240 goto bad; 241 } 242 enc = mtod(m, union fw_encap *); 243 enc->unfrag.ether_type = type; 244 enc->unfrag.lf = FW_ENCAP_UNFRAG; 245 enc->unfrag.reserved = 0; 246 247 /* 248 * Byte swap the encapsulation header manually. 249 */ 250 enc->ul[0] = htonl(enc->ul[0]); 251 252 IFQ_HANDOFF(ifp, m, error); 253 return (error); 254 } else { 255 /* 256 * Fragment the datagram, making sure to leave enough 257 * space for the encapsulation header in each packet. 258 */ 259 fsize = psize - 2*sizeof(uint32_t); 260 dgl = next_dgl++; 261 dsize = m->m_pkthdr.len; 262 foff = 0; 263 while (m) { 264 if (m->m_pkthdr.len > fsize) { 265 /* 266 * Split off the tail segment from the 267 * datagram, copying our tags over. 268 */ 269 mtail = m_split(m, fsize, M_DONTWAIT); 270 m_tag_copy_chain(mtail, m, M_NOWAIT); 271 } else { 272 mtail = 0; 273 } 274 275 /* 276 * Add our encapsulation header to this 277 * fragment and hand it off to the link. 278 */ 279 M_PREPEND(m, 2*sizeof(uint32_t), M_DONTWAIT); 280 if (!m) { 281 error = ENOBUFS; 282 goto bad; 283 } 284 enc = mtod(m, union fw_encap *); 285 if (foff == 0) { 286 enc->firstfrag.lf = FW_ENCAP_FIRST; 287 enc->firstfrag.reserved1 = 0; 288 enc->firstfrag.reserved2 = 0; 289 enc->firstfrag.datagram_size = dsize - 1; 290 enc->firstfrag.ether_type = type; 291 enc->firstfrag.dgl = dgl; 292 } else { 293 if (mtail) 294 enc->nextfrag.lf = FW_ENCAP_NEXT; 295 else 296 enc->nextfrag.lf = FW_ENCAP_LAST; 297 enc->nextfrag.reserved1 = 0; 298 enc->nextfrag.reserved2 = 0; 299 enc->nextfrag.reserved3 = 0; 300 enc->nextfrag.datagram_size = dsize - 1; 301 enc->nextfrag.fragment_offset = foff; 302 enc->nextfrag.dgl = dgl; 303 } 304 foff += m->m_pkthdr.len - 2*sizeof(uint32_t); 305 306 /* 307 * Byte swap the encapsulation header manually. 308 */ 309 enc->ul[0] = htonl(enc->ul[0]); 310 enc->ul[1] = htonl(enc->ul[1]); 311 312 IFQ_HANDOFF(ifp, m, error); 313 if (error) { 314 if (mtail) 315 m_freem(mtail); 316 return (ENOBUFS); 317 } 318 319 m = mtail; 320 } 321 322 return (0); 323 } 324 325bad: 326 if (m) 327 m_freem(m); 328 return (error); 329} 330 331static struct mbuf * 332firewire_input_fragment(struct fw_com *fc, struct mbuf *m, int src) 333{ 334 union fw_encap *enc; 335 struct fw_reass *r; 336 struct mbuf *mf, *mprev; 337 int dsize; 338 int fstart, fend, start, end, islast; 339 uint32_t id; 340 341 GIANT_REQUIRED; 342 343 /* 344 * Find an existing reassembly buffer or create a new one. 345 */ 346 enc = mtod(m, union fw_encap *); 347 id = enc->firstfrag.dgl | (src << 16); 348 STAILQ_FOREACH(r, &fc->fc_frags, fr_link) 349 if (r->fr_id == id) 350 break; 351 if (!r) { 352 r = malloc(sizeof(struct fw_reass), M_TEMP, M_NOWAIT); 353 if (!r) { 354 m_freem(m); 355 return 0; 356 } 357 r->fr_id = id; 358 r->fr_frags = 0; 359 STAILQ_INSERT_HEAD(&fc->fc_frags, r, fr_link); 360 } 361 362 /* 363 * If this fragment overlaps any other fragment, we must discard 364 * the partial reassembly and start again. 365 */ 366 if (enc->firstfrag.lf == FW_ENCAP_FIRST) 367 fstart = 0; 368 else 369 fstart = enc->nextfrag.fragment_offset; 370 fend = fstart + m->m_pkthdr.len - 2*sizeof(uint32_t); 371 dsize = enc->nextfrag.datagram_size; 372 islast = (enc->nextfrag.lf == FW_ENCAP_LAST); 373 374 for (mf = r->fr_frags; mf; mf = mf->m_nextpkt) { 375 enc = mtod(mf, union fw_encap *); 376 if (enc->nextfrag.datagram_size != dsize) { 377 /* 378 * This fragment must be from a different 379 * packet. 380 */ 381 goto bad; 382 } 383 if (enc->firstfrag.lf == FW_ENCAP_FIRST) 384 start = 0; 385 else 386 start = enc->nextfrag.fragment_offset; 387 end = start + mf->m_pkthdr.len - 2*sizeof(uint32_t); 388 if ((fstart < end && fend > start) || 389 (islast && enc->nextfrag.lf == FW_ENCAP_LAST)) { 390 /* 391 * Overlap - discard reassembly buffer and start 392 * again with this fragment. 393 */ 394 goto bad; 395 } 396 } 397 398 /* 399 * Find where to put this fragment in the list. 400 */ 401 for (mf = r->fr_frags, mprev = NULL; mf; 402 mprev = mf, mf = mf->m_nextpkt) { 403 enc = mtod(mf, union fw_encap *); 404 if (enc->firstfrag.lf == FW_ENCAP_FIRST) 405 start = 0; 406 else 407 start = enc->nextfrag.fragment_offset; 408 if (start >= fend) 409 break; 410 } 411 412 /* 413 * If this is a last fragment and we are not adding at the end 414 * of the list, discard the buffer. 415 */ 416 if (islast && mprev && mprev->m_nextpkt) 417 goto bad; 418 419 if (mprev) { 420 m->m_nextpkt = mprev->m_nextpkt; 421 mprev->m_nextpkt = m; 422 423 /* 424 * Coalesce forwards and see if we can make a whole 425 * datagram. 426 */ 427 enc = mtod(mprev, union fw_encap *); 428 if (enc->firstfrag.lf == FW_ENCAP_FIRST) 429 start = 0; 430 else 431 start = enc->nextfrag.fragment_offset; 432 end = start + mprev->m_pkthdr.len - 2*sizeof(uint32_t); 433 while (end == fstart) { 434 /* 435 * Strip off the encap header from m and 436 * append it to mprev, freeing m. 437 */ 438 m_adj(m, 2*sizeof(uint32_t)); 439 mprev->m_nextpkt = m->m_nextpkt; 440 mprev->m_pkthdr.len += m->m_pkthdr.len; 441 m_cat(mprev, m); 442 443 if (mprev->m_pkthdr.len == dsize + 1 + 2*sizeof(uint32_t)) { 444 /* 445 * We have assembled a complete packet 446 * we must be finished. Make sure we have 447 * merged the whole chain. 448 */ 449 STAILQ_REMOVE(&fc->fc_frags, r, fw_reass, fr_link); 450 free(r, M_TEMP); 451 m = mprev->m_nextpkt; 452 while (m) { 453 mf = m->m_nextpkt; 454 m_freem(m); 455 m = mf; 456 } 457 mprev->m_nextpkt = NULL; 458 459 return (mprev); 460 } 461 462 /* 463 * See if we can continue merging forwards. 464 */ 465 end = fend; 466 m = mprev->m_nextpkt; 467 if (m) { 468 enc = mtod(m, union fw_encap *); 469 if (enc->firstfrag.lf == FW_ENCAP_FIRST) 470 fstart = 0; 471 else 472 fstart = enc->nextfrag.fragment_offset; 473 fend = fstart + m->m_pkthdr.len 474 - 2*sizeof(uint32_t); 475 } else { 476 break; 477 } 478 } 479 } else { 480 m->m_nextpkt = 0; 481 r->fr_frags = m; 482 } 483 484 return (0); 485 486bad: 487 while (r->fr_frags) { 488 mf = r->fr_frags; 489 r->fr_frags = mf->m_nextpkt; 490 m_freem(mf); 491 } 492 m->m_nextpkt = 0; 493 r->fr_frags = m; 494 495 return (0); 496} 497 498void 499firewire_input(struct ifnet *ifp, struct mbuf *m, uint16_t src) 500{ 501 struct fw_com *fc = IFP2FWC(ifp); 502 union fw_encap *enc; 503 int type, isr; 504 505 GIANT_REQUIRED; 506 507 /* 508 * The caller has already stripped off the packet header 509 * (stream or wreqb) and marked the mbuf's M_BCAST flag 510 * appropriately. We de-encapsulate the IP packet and pass it 511 * up the line after handling link-level fragmentation. 512 */ 513 if (m->m_pkthdr.len < sizeof(uint32_t)) { 514 if_printf(ifp, "discarding frame without " 515 "encapsulation header (len %u pkt len %u)\n", 516 m->m_len, m->m_pkthdr.len); 517 } 518 519 m = m_pullup(m, sizeof(uint32_t)); 520 enc = mtod(m, union fw_encap *); 521 522 /* 523 * Byte swap the encapsulation header manually. 524 */ 525 enc->ul[0] = ntohl(enc->ul[0]); 526 527 if (enc->unfrag.lf != 0) { 528 m = m_pullup(m, 2*sizeof(uint32_t)); 529 if (!m) 530 return; 531 enc = mtod(m, union fw_encap *); 532 enc->ul[1] = ntohl(enc->ul[1]); 533 m = firewire_input_fragment(fc, m, src); 534 if (!m) 535 return; 536 enc = mtod(m, union fw_encap *); 537 type = enc->firstfrag.ether_type; 538 m_adj(m, 2*sizeof(uint32_t)); 539 } else { 540 type = enc->unfrag.ether_type; 541 m_adj(m, sizeof(uint32_t)); 542 } 543 544 if (m->m_pkthdr.rcvif == NULL) { 545 if_printf(ifp, "discard frame w/o interface pointer\n"); 546 ifp->if_ierrors++; 547 m_freem(m); 548 return; 549 } 550#ifdef DIAGNOSTIC 551 if (m->m_pkthdr.rcvif != ifp) { 552 if_printf(ifp, "Warning, frame marked as received on %s\n", 553 m->m_pkthdr.rcvif->if_xname); 554 } 555#endif 556 557#ifdef MAC 558 /* 559 * Tag the mbuf with an appropriate MAC label before any other 560 * consumers can get to it. 561 */ 562 mac_create_mbuf_from_ifnet(ifp, m); 563#endif 564 565 /* 566 * Give bpf a chance at the packet. The link-level driver 567 * should have left us a tag with the EUID of the sender. 568 */ 569 if (bpf_peers_present(ifp->if_bpf)) { 570 struct fw_bpfhdr h; 571 struct m_tag *mtag; 572 573 mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_SENDER_EUID, 0); 574 if (mtag) 575 bcopy(mtag + 1, h.firewire_shost, 8); 576 else 577 bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8); 578 bcopy(&fc->fc_hwaddr, h.firewire_dhost, 8); 579 h.firewire_type = htons(type); 580 bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m); 581 } 582 583 if (ifp->if_flags & IFF_MONITOR) { 584 /* 585 * Interface marked for monitoring; discard packet. 586 */ 587 m_freem(m); 588 return; 589 } 590 591 ifp->if_ibytes += m->m_pkthdr.len; 592 593 /* Discard packet if interface is not up */ 594 if ((ifp->if_flags & IFF_UP) == 0) { 595 m_freem(m); 596 return; 597 } 598 599 if (m->m_flags & (M_BCAST|M_MCAST)) 600 ifp->if_imcasts++; 601 602 switch (type) { 603#ifdef INET 604 case ETHERTYPE_IP: 605 if ((m = ip_fastforward(m)) == NULL) 606 return; 607 isr = NETISR_IP; 608 break; 609 610 case ETHERTYPE_ARP: 611 { 612 struct arphdr *ah; 613 ah = mtod(m, struct arphdr *); 614 615 /* 616 * Adjust the arp packet to insert an empty tha slot. 617 */ 618 m->m_len += ah->ar_hln; 619 m->m_pkthdr.len += ah->ar_hln; 620 bcopy(ar_tha(ah), ar_tpa(ah), ah->ar_pln); 621 isr = NETISR_ARP; 622 break; 623 } 624#endif 625 626#ifdef INET6 627 case ETHERTYPE_IPV6: 628 isr = NETISR_IPV6; 629 break; 630#endif 631 632 default: 633 m_freem(m); 634 return; 635 } 636 637 netisr_dispatch(isr, m); 638} 639 640int 641firewire_ioctl(struct ifnet *ifp, int command, caddr_t data) 642{ 643 struct ifaddr *ifa = (struct ifaddr *) data; 644 struct ifreq *ifr = (struct ifreq *) data; 645 int error = 0; 646 647 switch (command) { 648 case SIOCSIFADDR: 649 ifp->if_flags |= IFF_UP; 650 651 switch (ifa->ifa_addr->sa_family) { 652#ifdef INET 653 case AF_INET: 654 ifp->if_init(ifp->if_softc); /* before arpwhohas */ 655 arp_ifinit(ifp, ifa); 656 break; 657#endif 658 default: 659 ifp->if_init(ifp->if_softc); 660 break; 661 } 662 break; 663 664 case SIOCGIFADDR: 665 { 666 struct sockaddr *sa; 667 668 sa = (struct sockaddr *) & ifr->ifr_data; 669 bcopy(&IFP2FWC(ifp)->fc_hwaddr, 670 (caddr_t) sa->sa_data, sizeof(struct fw_hwaddr)); 671 } 672 break; 673 674 case SIOCSIFMTU: 675 /* 676 * Set the interface MTU. 677 */ 678 if (ifr->ifr_mtu > 1500) { 679 error = EINVAL; 680 } else { 681 ifp->if_mtu = ifr->ifr_mtu; 682 } 683 break; 684 default: 685 error = EINVAL; /* XXX netbsd has ENOTTY??? */ 686 break; 687 } 688 return (error); 689} 690 691static int 692firewire_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 693 struct sockaddr *sa) 694{ 695#ifdef INET 696 struct sockaddr_in *sin; 697#endif 698#ifdef INET6 699 struct sockaddr_in6 *sin6; 700#endif 701 702 switch(sa->sa_family) { 703 case AF_LINK: 704 /* 705 * No mapping needed. 706 */ 707 *llsa = 0; 708 return 0; 709 710#ifdef INET 711 case AF_INET: 712 sin = (struct sockaddr_in *)sa; 713 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 714 return EADDRNOTAVAIL; 715 *llsa = 0; 716 return 0; 717#endif 718#ifdef INET6 719 case AF_INET6: 720 sin6 = (struct sockaddr_in6 *)sa; 721 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 722 /* 723 * An IP6 address of 0 means listen to all 724 * of the Ethernet multicast address used for IP6. 725 * (This is used for multicast routers.) 726 */ 727 ifp->if_flags |= IFF_ALLMULTI; 728 *llsa = 0; 729 return 0; 730 } 731 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 732 return EADDRNOTAVAIL; 733 *llsa = 0; 734 return 0; 735#endif 736 737 default: 738 /* 739 * Well, the text isn't quite right, but it's the name 740 * that counts... 741 */ 742 return EAFNOSUPPORT; 743 } 744} 745 746void 747firewire_ifattach(struct ifnet *ifp, struct fw_hwaddr *llc) 748{ 749 struct fw_com *fc = IFP2FWC(ifp); 750 struct ifaddr *ifa; 751 struct sockaddr_dl *sdl; 752 static const char* speeds[] = { 753 "S100", "S200", "S400", "S800", 754 "S1600", "S3200" 755 }; 756 757 fc->fc_speed = llc->sspd; 758 STAILQ_INIT(&fc->fc_frags); 759 760 ifp->if_addrlen = sizeof(struct fw_hwaddr); 761 ifp->if_hdrlen = 0; 762 if_attach(ifp); 763 ifp->if_mtu = 1500; /* XXX */ 764 ifp->if_output = firewire_output; 765 ifp->if_resolvemulti = firewire_resolvemulti; 766 ifp->if_broadcastaddr = (u_char *) &firewire_broadcastaddr; 767 768 ifa = ifp->if_addr; 769 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 770 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 771 sdl->sdl_type = IFT_IEEE1394; 772 sdl->sdl_alen = ifp->if_addrlen; 773 bcopy(llc, LLADDR(sdl), ifp->if_addrlen); 774 775 bpfattach(ifp, DLT_APPLE_IP_OVER_IEEE1394, 776 sizeof(struct fw_hwaddr)); 777 778 if_printf(ifp, "Firewire address: %8D @ 0x%04x%08x, %s, maxrec %d\n", 779 (uint8_t *) &llc->sender_unique_ID_hi, ":", 780 ntohs(llc->sender_unicast_FIFO_hi), 781 ntohl(llc->sender_unicast_FIFO_lo), 782 speeds[llc->sspd], 783 (2 << llc->sender_max_rec)); 784} 785 786void 787firewire_ifdetach(struct ifnet *ifp) 788{ 789 bpfdetach(ifp); 790 if_detach(ifp); 791} 792 793void 794firewire_busreset(struct ifnet *ifp) 795{ 796 struct fw_com *fc = IFP2FWC(ifp); 797 struct fw_reass *r; 798 struct mbuf *m; 799 800 /* 801 * Discard any partial datagrams since the host ids may have changed. 802 */ 803 while ((r = STAILQ_FIRST(&fc->fc_frags))) { 804 STAILQ_REMOVE_HEAD(&fc->fc_frags, fr_link); 805 while (r->fr_frags) { 806 m = r->fr_frags; 807 r->fr_frags = m->m_nextpkt; 808 m_freem(m); 809 } 810 free(r, M_TEMP); 811 } 812} 813 814static void * 815firewire_alloc(u_char type, struct ifnet *ifp) 816{ 817 struct fw_com *fc; 818 819 fc = malloc(sizeof(struct fw_com), M_FWCOM, M_WAITOK | M_ZERO); 820 fc->fc_ifp = ifp; 821 822 return (fc); 823} 824 825static void 826firewire_free(void *com, u_char type) 827{ 828 829 free(com, M_FWCOM); 830} 831 832static int 833firewire_modevent(module_t mod, int type, void *data) 834{ 835 836 switch (type) { 837 case MOD_LOAD: 838 if_register_com_alloc(IFT_IEEE1394, 839 firewire_alloc, firewire_free); 840 break; 841 case MOD_UNLOAD: 842 if_deregister_com_alloc(IFT_IEEE1394); 843 break; 844 default: 845 return (EOPNOTSUPP); 846 } 847 848 return (0); 849} 850 851static moduledata_t firewire_mod = { 852 "if_firewire", 853 firewire_modevent, 854 0 855}; 856 857DECLARE_MODULE(if_firewire, firewire_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 858MODULE_VERSION(if_firewire, 1); 859