FreeBSD/Linux Kernel Cross Reference
sys/net/if_fwsubr.c
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: releng/7.3/sys/net/if_fwsubr.c 184739 2008-11-06 22:11:57Z julian $
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
66 MALLOC_DEFINE(M_FWCOM, "fw_com", "firewire interface internals");
67
68 struct fw_hwaddr firewire_broadcastaddr = {
69 0xffffffff,
70 0xffffffff,
71 0xff,
72 0xff,
73 0xffff,
74 0xffffffff
75 };
76
77 static int
78 firewire_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
325 bad:
326 if (m)
327 m_freem(m);
328 return (error);
329 }
330
331 static struct mbuf *
332 firewire_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 /*
342 * Find an existing reassembly buffer or create a new one.
343 */
344 enc = mtod(m, union fw_encap *);
345 id = enc->firstfrag.dgl | (src << 16);
346 STAILQ_FOREACH(r, &fc->fc_frags, fr_link)
347 if (r->fr_id == id)
348 break;
349 if (!r) {
350 r = malloc(sizeof(struct fw_reass), M_TEMP, M_NOWAIT);
351 if (!r) {
352 m_freem(m);
353 return 0;
354 }
355 r->fr_id = id;
356 r->fr_frags = 0;
357 STAILQ_INSERT_HEAD(&fc->fc_frags, r, fr_link);
358 }
359
360 /*
361 * If this fragment overlaps any other fragment, we must discard
362 * the partial reassembly and start again.
363 */
364 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
365 fstart = 0;
366 else
367 fstart = enc->nextfrag.fragment_offset;
368 fend = fstart + m->m_pkthdr.len - 2*sizeof(uint32_t);
369 dsize = enc->nextfrag.datagram_size;
370 islast = (enc->nextfrag.lf == FW_ENCAP_LAST);
371
372 for (mf = r->fr_frags; mf; mf = mf->m_nextpkt) {
373 enc = mtod(mf, union fw_encap *);
374 if (enc->nextfrag.datagram_size != dsize) {
375 /*
376 * This fragment must be from a different
377 * packet.
378 */
379 goto bad;
380 }
381 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
382 start = 0;
383 else
384 start = enc->nextfrag.fragment_offset;
385 end = start + mf->m_pkthdr.len - 2*sizeof(uint32_t);
386 if ((fstart < end && fend > start) ||
387 (islast && enc->nextfrag.lf == FW_ENCAP_LAST)) {
388 /*
389 * Overlap - discard reassembly buffer and start
390 * again with this fragment.
391 */
392 goto bad;
393 }
394 }
395
396 /*
397 * Find where to put this fragment in the list.
398 */
399 for (mf = r->fr_frags, mprev = NULL; mf;
400 mprev = mf, mf = mf->m_nextpkt) {
401 enc = mtod(mf, union fw_encap *);
402 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
403 start = 0;
404 else
405 start = enc->nextfrag.fragment_offset;
406 if (start >= fend)
407 break;
408 }
409
410 /*
411 * If this is a last fragment and we are not adding at the end
412 * of the list, discard the buffer.
413 */
414 if (islast && mprev && mprev->m_nextpkt)
415 goto bad;
416
417 if (mprev) {
418 m->m_nextpkt = mprev->m_nextpkt;
419 mprev->m_nextpkt = m;
420
421 /*
422 * Coalesce forwards and see if we can make a whole
423 * datagram.
424 */
425 enc = mtod(mprev, union fw_encap *);
426 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
427 start = 0;
428 else
429 start = enc->nextfrag.fragment_offset;
430 end = start + mprev->m_pkthdr.len - 2*sizeof(uint32_t);
431 while (end == fstart) {
432 /*
433 * Strip off the encap header from m and
434 * append it to mprev, freeing m.
435 */
436 m_adj(m, 2*sizeof(uint32_t));
437 mprev->m_nextpkt = m->m_nextpkt;
438 mprev->m_pkthdr.len += m->m_pkthdr.len;
439 m_cat(mprev, m);
440
441 if (mprev->m_pkthdr.len == dsize + 1 + 2*sizeof(uint32_t)) {
442 /*
443 * We have assembled a complete packet
444 * we must be finished. Make sure we have
445 * merged the whole chain.
446 */
447 STAILQ_REMOVE(&fc->fc_frags, r, fw_reass, fr_link);
448 free(r, M_TEMP);
449 m = mprev->m_nextpkt;
450 while (m) {
451 mf = m->m_nextpkt;
452 m_freem(m);
453 m = mf;
454 }
455 mprev->m_nextpkt = NULL;
456
457 return (mprev);
458 }
459
460 /*
461 * See if we can continue merging forwards.
462 */
463 end = fend;
464 m = mprev->m_nextpkt;
465 if (m) {
466 enc = mtod(m, union fw_encap *);
467 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
468 fstart = 0;
469 else
470 fstart = enc->nextfrag.fragment_offset;
471 fend = fstart + m->m_pkthdr.len
472 - 2*sizeof(uint32_t);
473 } else {
474 break;
475 }
476 }
477 } else {
478 m->m_nextpkt = 0;
479 r->fr_frags = m;
480 }
481
482 return (0);
483
484 bad:
485 while (r->fr_frags) {
486 mf = r->fr_frags;
487 r->fr_frags = mf->m_nextpkt;
488 m_freem(mf);
489 }
490 m->m_nextpkt = 0;
491 r->fr_frags = m;
492
493 return (0);
494 }
495
496 void
497 firewire_input(struct ifnet *ifp, struct mbuf *m, uint16_t src)
498 {
499 struct fw_com *fc = IFP2FWC(ifp);
500 union fw_encap *enc;
501 int type, isr;
502
503 /*
504 * The caller has already stripped off the packet header
505 * (stream or wreqb) and marked the mbuf's M_BCAST flag
506 * appropriately. We de-encapsulate the IP packet and pass it
507 * up the line after handling link-level fragmentation.
508 */
509 if (m->m_pkthdr.len < sizeof(uint32_t)) {
510 if_printf(ifp, "discarding frame without "
511 "encapsulation header (len %u pkt len %u)\n",
512 m->m_len, m->m_pkthdr.len);
513 }
514
515 m = m_pullup(m, sizeof(uint32_t));
516 if (m == NULL)
517 return;
518 enc = mtod(m, union fw_encap *);
519
520 /*
521 * Byte swap the encapsulation header manually.
522 */
523 enc->ul[0] = ntohl(enc->ul[0]);
524
525 if (enc->unfrag.lf != 0) {
526 m = m_pullup(m, 2*sizeof(uint32_t));
527 if (!m)
528 return;
529 enc = mtod(m, union fw_encap *);
530 enc->ul[1] = ntohl(enc->ul[1]);
531 m = firewire_input_fragment(fc, m, src);
532 if (!m)
533 return;
534 enc = mtod(m, union fw_encap *);
535 type = enc->firstfrag.ether_type;
536 m_adj(m, 2*sizeof(uint32_t));
537 } else {
538 type = enc->unfrag.ether_type;
539 m_adj(m, sizeof(uint32_t));
540 }
541
542 if (m->m_pkthdr.rcvif == NULL) {
543 if_printf(ifp, "discard frame w/o interface pointer\n");
544 ifp->if_ierrors++;
545 m_freem(m);
546 return;
547 }
548 #ifdef DIAGNOSTIC
549 if (m->m_pkthdr.rcvif != ifp) {
550 if_printf(ifp, "Warning, frame marked as received on %s\n",
551 m->m_pkthdr.rcvif->if_xname);
552 }
553 #endif
554
555 #ifdef MAC
556 /*
557 * Tag the mbuf with an appropriate MAC label before any other
558 * consumers can get to it.
559 */
560 mac_create_mbuf_from_ifnet(ifp, m);
561 #endif
562
563 /*
564 * Give bpf a chance at the packet. The link-level driver
565 * should have left us a tag with the EUID of the sender.
566 */
567 if (bpf_peers_present(ifp->if_bpf)) {
568 struct fw_bpfhdr h;
569 struct m_tag *mtag;
570
571 mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_SENDER_EUID, 0);
572 if (mtag)
573 bcopy(mtag + 1, h.firewire_shost, 8);
574 else
575 bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8);
576 bcopy(&fc->fc_hwaddr, h.firewire_dhost, 8);
577 h.firewire_type = htons(type);
578 bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m);
579 }
580
581 if (ifp->if_flags & IFF_MONITOR) {
582 /*
583 * Interface marked for monitoring; discard packet.
584 */
585 m_freem(m);
586 return;
587 }
588
589 ifp->if_ibytes += m->m_pkthdr.len;
590
591 /* Discard packet if interface is not up */
592 if ((ifp->if_flags & IFF_UP) == 0) {
593 m_freem(m);
594 return;
595 }
596
597 if (m->m_flags & (M_BCAST|M_MCAST))
598 ifp->if_imcasts++;
599
600 switch (type) {
601 #ifdef INET
602 case ETHERTYPE_IP:
603 if ((m = ip_fastforward(m)) == NULL)
604 return;
605 isr = NETISR_IP;
606 break;
607
608 case ETHERTYPE_ARP:
609 {
610 struct arphdr *ah;
611 ah = mtod(m, struct arphdr *);
612
613 /*
614 * Adjust the arp packet to insert an empty tha slot.
615 */
616 m->m_len += ah->ar_hln;
617 m->m_pkthdr.len += ah->ar_hln;
618 bcopy(ar_tha(ah), ar_tpa(ah), ah->ar_pln);
619 isr = NETISR_ARP;
620 break;
621 }
622 #endif
623
624 #ifdef INET6
625 case ETHERTYPE_IPV6:
626 isr = NETISR_IPV6;
627 break;
628 #endif
629
630 default:
631 m_freem(m);
632 return;
633 }
634
635 netisr_dispatch(isr, m);
636 }
637
638 int
639 firewire_ioctl(struct ifnet *ifp, int command, caddr_t data)
640 {
641 struct ifaddr *ifa = (struct ifaddr *) data;
642 struct ifreq *ifr = (struct ifreq *) data;
643 int error = 0;
644
645 switch (command) {
646 case SIOCSIFADDR:
647 ifp->if_flags |= IFF_UP;
648
649 switch (ifa->ifa_addr->sa_family) {
650 #ifdef INET
651 case AF_INET:
652 ifp->if_init(ifp->if_softc); /* before arpwhohas */
653 arp_ifinit(ifp, ifa);
654 break;
655 #endif
656 default:
657 ifp->if_init(ifp->if_softc);
658 break;
659 }
660 break;
661
662 case SIOCGIFADDR:
663 {
664 struct sockaddr *sa;
665
666 sa = (struct sockaddr *) & ifr->ifr_data;
667 bcopy(&IFP2FWC(ifp)->fc_hwaddr,
668 (caddr_t) sa->sa_data, sizeof(struct fw_hwaddr));
669 }
670 break;
671
672 case SIOCSIFMTU:
673 /*
674 * Set the interface MTU.
675 */
676 if (ifr->ifr_mtu > 1500) {
677 error = EINVAL;
678 } else {
679 ifp->if_mtu = ifr->ifr_mtu;
680 }
681 break;
682 default:
683 error = EINVAL; /* XXX netbsd has ENOTTY??? */
684 break;
685 }
686 return (error);
687 }
688
689 static int
690 firewire_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa,
691 struct sockaddr *sa)
692 {
693 #ifdef INET
694 struct sockaddr_in *sin;
695 #endif
696 #ifdef INET6
697 struct sockaddr_in6 *sin6;
698 #endif
699
700 switch(sa->sa_family) {
701 case AF_LINK:
702 /*
703 * No mapping needed.
704 */
705 *llsa = 0;
706 return 0;
707
708 #ifdef INET
709 case AF_INET:
710 sin = (struct sockaddr_in *)sa;
711 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
712 return EADDRNOTAVAIL;
713 *llsa = 0;
714 return 0;
715 #endif
716 #ifdef INET6
717 case AF_INET6:
718 sin6 = (struct sockaddr_in6 *)sa;
719 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
720 /*
721 * An IP6 address of 0 means listen to all
722 * of the Ethernet multicast address used for IP6.
723 * (This is used for multicast routers.)
724 */
725 ifp->if_flags |= IFF_ALLMULTI;
726 *llsa = 0;
727 return 0;
728 }
729 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
730 return EADDRNOTAVAIL;
731 *llsa = 0;
732 return 0;
733 #endif
734
735 default:
736 /*
737 * Well, the text isn't quite right, but it's the name
738 * that counts...
739 */
740 return EAFNOSUPPORT;
741 }
742 }
743
744 void
745 firewire_ifattach(struct ifnet *ifp, struct fw_hwaddr *llc)
746 {
747 struct fw_com *fc = IFP2FWC(ifp);
748 struct ifaddr *ifa;
749 struct sockaddr_dl *sdl;
750 static const char* speeds[] = {
751 "S100", "S200", "S400", "S800",
752 "S1600", "S3200"
753 };
754
755 fc->fc_speed = llc->sspd;
756 STAILQ_INIT(&fc->fc_frags);
757
758 ifp->if_addrlen = sizeof(struct fw_hwaddr);
759 ifp->if_hdrlen = 0;
760 if_attach(ifp);
761 ifp->if_mtu = 1500; /* XXX */
762 ifp->if_output = firewire_output;
763 ifp->if_resolvemulti = firewire_resolvemulti;
764 ifp->if_broadcastaddr = (u_char *) &firewire_broadcastaddr;
765
766 ifa = ifp->if_addr;
767 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
768 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
769 sdl->sdl_type = IFT_IEEE1394;
770 sdl->sdl_alen = ifp->if_addrlen;
771 bcopy(llc, LLADDR(sdl), ifp->if_addrlen);
772
773 bpfattach(ifp, DLT_APPLE_IP_OVER_IEEE1394,
774 sizeof(struct fw_hwaddr));
775
776 if_printf(ifp, "Firewire address: %8D @ 0x%04x%08x, %s, maxrec %d\n",
777 (uint8_t *) &llc->sender_unique_ID_hi, ":",
778 ntohs(llc->sender_unicast_FIFO_hi),
779 ntohl(llc->sender_unicast_FIFO_lo),
780 speeds[llc->sspd],
781 (2 << llc->sender_max_rec));
782 }
783
784 void
785 firewire_ifdetach(struct ifnet *ifp)
786 {
787 bpfdetach(ifp);
788 if_detach(ifp);
789 }
790
791 void
792 firewire_busreset(struct ifnet *ifp)
793 {
794 struct fw_com *fc = IFP2FWC(ifp);
795 struct fw_reass *r;
796 struct mbuf *m;
797
798 /*
799 * Discard any partial datagrams since the host ids may have changed.
800 */
801 while ((r = STAILQ_FIRST(&fc->fc_frags))) {
802 STAILQ_REMOVE_HEAD(&fc->fc_frags, fr_link);
803 while (r->fr_frags) {
804 m = r->fr_frags;
805 r->fr_frags = m->m_nextpkt;
806 m_freem(m);
807 }
808 free(r, M_TEMP);
809 }
810 }
811
812 static void *
813 firewire_alloc(u_char type, struct ifnet *ifp)
814 {
815 struct fw_com *fc;
816
817 fc = malloc(sizeof(struct fw_com), M_FWCOM, M_WAITOK | M_ZERO);
818 fc->fc_ifp = ifp;
819
820 return (fc);
821 }
822
823 static void
824 firewire_free(void *com, u_char type)
825 {
826
827 free(com, M_FWCOM);
828 }
829
830 static int
831 firewire_modevent(module_t mod, int type, void *data)
832 {
833
834 switch (type) {
835 case MOD_LOAD:
836 if_register_com_alloc(IFT_IEEE1394,
837 firewire_alloc, firewire_free);
838 break;
839 case MOD_UNLOAD:
840 if_deregister_com_alloc(IFT_IEEE1394);
841 break;
842 default:
843 return (EOPNOTSUPP);
844 }
845
846 return (0);
847 }
848
849 static moduledata_t firewire_mod = {
850 "if_firewire",
851 firewire_modevent,
852 0
853 };
854
855 DECLARE_MODULE(if_firewire, firewire_mod, SI_SUB_INIT_IF, SI_ORDER_ANY);
856 MODULE_VERSION(if_firewire, 1);
Cache object: 0fb57457a8d6910c21480f162a623b8b
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