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/6.4/sys/net/if_fwsubr.c 166110 2007-01-19 23:01:34Z jhb $
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/mac.h>
41 #include <sys/malloc.h>
42 #include <sys/mbuf.h>
43 #include <sys/module.h>
44 #include <sys/socket.h>
45 #include <sys/sockio.h>
46
47 #include <net/if.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
56 #if defined(INET) || defined(INET6)
57 #include <netinet/in.h>
58 #include <netinet/in_var.h>
59 #include <netinet/if_ether.h>
60 #endif
61 #ifdef INET6
62 #include <netinet6/nd6.h>
63 #endif
64
65 MALLOC_DEFINE(M_FWCOM, "fw_com", "firewire interface internals");
66
67 struct fw_hwaddr firewire_broadcastaddr = {
68 0xffffffff,
69 0xffffffff,
70 0xff,
71 0xff,
72 0xffff,
73 0xffffffff
74 };
75
76 static int
77 firewire_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
78 struct rtentry *rt0)
79 {
80 struct fw_com *fc = IFP2FWC(ifp);
81 int error, type;
82 struct rtentry *rt = NULL;
83 struct m_tag *mtag;
84 union fw_encap *enc;
85 struct fw_hwaddr *destfw;
86 uint8_t speed;
87 uint16_t psize, fsize, dsize;
88 struct mbuf *mtail;
89 int unicast, dgl, foff;
90 static int next_dgl;
91
92 #ifdef MAC
93 error = mac_check_ifnet_transmit(ifp, m);
94 if (error)
95 goto bad;
96 #endif
97
98 if (!((ifp->if_flags & IFF_UP) &&
99 (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
100 error = ENETDOWN;
101 goto bad;
102 }
103
104 if (rt0 != NULL) {
105 error = rt_check(&rt, &rt0, dst);
106 if (error)
107 goto bad;
108 RT_UNLOCK(rt);
109 }
110
111 /*
112 * For unicast, we make a tag to store the lladdr of the
113 * destination. This might not be the first time we have seen
114 * the packet (for instance, the arp code might be trying to
115 * re-send it after receiving an arp reply) so we only
116 * allocate a tag if there isn't one there already. For
117 * multicast, we will eventually use a different tag to store
118 * the channel number.
119 */
120 unicast = !(m->m_flags & (M_BCAST | M_MCAST));
121 if (unicast) {
122 mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, NULL);
123 if (!mtag) {
124 mtag = m_tag_alloc(MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR,
125 sizeof (struct fw_hwaddr), M_NOWAIT);
126 if (!mtag) {
127 error = ENOMEM;
128 goto bad;
129 }
130 m_tag_prepend(m, mtag);
131 }
132 destfw = (struct fw_hwaddr *)(mtag + 1);
133 } else {
134 destfw = 0;
135 }
136
137 switch (dst->sa_family) {
138 #ifdef AF_INET
139 case AF_INET:
140 /*
141 * Only bother with arp for unicast. Allocation of
142 * channels etc. for firewire is quite different and
143 * doesn't fit into the arp model.
144 */
145 if (unicast) {
146 error = arpresolve(ifp, rt, m, dst, (u_char *) destfw);
147 if (error)
148 return (error == EWOULDBLOCK ? 0 : error);
149 }
150 type = ETHERTYPE_IP;
151 break;
152
153 case AF_ARP:
154 {
155 struct arphdr *ah;
156 ah = mtod(m, struct arphdr *);
157 ah->ar_hrd = htons(ARPHRD_IEEE1394);
158 type = ETHERTYPE_ARP;
159 if (unicast)
160 *destfw = *(struct fw_hwaddr *) ar_tha(ah);
161
162 /*
163 * The standard arp code leaves a hole for the target
164 * hardware address which we need to close up.
165 */
166 bcopy(ar_tpa(ah), ar_tha(ah), ah->ar_pln);
167 m_adj(m, -ah->ar_hln);
168 break;
169 }
170 #endif
171
172 #ifdef INET6
173 case AF_INET6:
174 if (unicast) {
175 error = nd6_storelladdr(fc->fc_ifp, rt, m, dst,
176 (u_char *) destfw);
177 if (error)
178 return (error);
179 }
180 type = ETHERTYPE_IPV6;
181 break;
182 #endif
183
184 default:
185 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
186 error = EAFNOSUPPORT;
187 goto bad;
188 }
189
190 /*
191 * Let BPF tap off a copy before we encapsulate.
192 */
193 if (bpf_peers_present(ifp->if_bpf)) {
194 struct fw_bpfhdr h;
195 if (unicast)
196 bcopy(destfw, h.firewire_dhost, 8);
197 else
198 bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8);
199 bcopy(&fc->fc_hwaddr, h.firewire_shost, 8);
200 h.firewire_type = htons(type);
201 bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m);
202 }
203
204 /*
205 * Punt on MCAP for now and send all multicast packets on the
206 * broadcast channel.
207 */
208 if (m->m_flags & M_MCAST)
209 m->m_flags |= M_BCAST;
210
211 /*
212 * Figure out what speed to use and what the largest supported
213 * packet size is. For unicast, this is the minimum of what we
214 * can speak and what they can hear. For broadcast, lets be
215 * conservative and use S100. We could possibly improve that
216 * by examining the bus manager's speed map or similar. We
217 * also reduce the packet size for broadcast to account for
218 * the GASP header.
219 */
220 if (unicast) {
221 speed = min(fc->fc_speed, destfw->sspd);
222 psize = min(512 << speed, 2 << destfw->sender_max_rec);
223 } else {
224 speed = 0;
225 psize = 512 - 2*sizeof(uint32_t);
226 }
227
228 /*
229 * Next, we encapsulate, possibly fragmenting the original
230 * datagram if it won't fit into a single packet.
231 */
232 if (m->m_pkthdr.len <= psize - sizeof(uint32_t)) {
233 /*
234 * No fragmentation is necessary.
235 */
236 M_PREPEND(m, sizeof(uint32_t), M_DONTWAIT);
237 if (!m) {
238 error = ENOBUFS;
239 goto bad;
240 }
241 enc = mtod(m, union fw_encap *);
242 enc->unfrag.ether_type = type;
243 enc->unfrag.lf = FW_ENCAP_UNFRAG;
244 enc->unfrag.reserved = 0;
245
246 /*
247 * Byte swap the encapsulation header manually.
248 */
249 enc->ul[0] = htonl(enc->ul[0]);
250
251 IFQ_HANDOFF(ifp, m, error);
252 return (error);
253 } else {
254 /*
255 * Fragment the datagram, making sure to leave enough
256 * space for the encapsulation header in each packet.
257 */
258 fsize = psize - 2*sizeof(uint32_t);
259 dgl = next_dgl++;
260 dsize = m->m_pkthdr.len;
261 foff = 0;
262 while (m) {
263 if (m->m_pkthdr.len > fsize) {
264 /*
265 * Split off the tail segment from the
266 * datagram, copying our tags over.
267 */
268 mtail = m_split(m, fsize, M_DONTWAIT);
269 m_tag_copy_chain(mtail, m, M_NOWAIT);
270 } else {
271 mtail = 0;
272 }
273
274 /*
275 * Add our encapsulation header to this
276 * fragment and hand it off to the link.
277 */
278 M_PREPEND(m, 2*sizeof(uint32_t), M_DONTWAIT);
279 if (!m) {
280 error = ENOBUFS;
281 goto bad;
282 }
283 enc = mtod(m, union fw_encap *);
284 if (foff == 0) {
285 enc->firstfrag.lf = FW_ENCAP_FIRST;
286 enc->firstfrag.reserved1 = 0;
287 enc->firstfrag.reserved2 = 0;
288 enc->firstfrag.datagram_size = dsize - 1;
289 enc->firstfrag.ether_type = type;
290 enc->firstfrag.dgl = dgl;
291 } else {
292 if (mtail)
293 enc->nextfrag.lf = FW_ENCAP_NEXT;
294 else
295 enc->nextfrag.lf = FW_ENCAP_LAST;
296 enc->nextfrag.reserved1 = 0;
297 enc->nextfrag.reserved2 = 0;
298 enc->nextfrag.reserved3 = 0;
299 enc->nextfrag.datagram_size = dsize - 1;
300 enc->nextfrag.fragment_offset = foff;
301 enc->nextfrag.dgl = dgl;
302 }
303 foff += m->m_pkthdr.len - 2*sizeof(uint32_t);
304
305 /*
306 * Byte swap the encapsulation header manually.
307 */
308 enc->ul[0] = htonl(enc->ul[0]);
309 enc->ul[1] = htonl(enc->ul[1]);
310
311 IFQ_HANDOFF(ifp, m, error);
312 if (error) {
313 if (mtail)
314 m_freem(mtail);
315 return (ENOBUFS);
316 }
317
318 m = mtail;
319 }
320
321 return (0);
322 }
323
324 bad:
325 if (m)
326 m_freem(m);
327 return (error);
328 }
329
330 static struct mbuf *
331 firewire_input_fragment(struct fw_com *fc, struct mbuf *m, int src)
332 {
333 union fw_encap *enc;
334 struct fw_reass *r;
335 struct mbuf *mf, *mprev;
336 int dsize;
337 int fstart, fend, start, end, islast;
338 uint32_t id;
339
340 GIANT_REQUIRED;
341
342 /*
343 * Find an existing reassembly buffer or create a new one.
344 */
345 enc = mtod(m, union fw_encap *);
346 id = enc->firstfrag.dgl | (src << 16);
347 STAILQ_FOREACH(r, &fc->fc_frags, fr_link)
348 if (r->fr_id == id)
349 break;
350 if (!r) {
351 r = malloc(sizeof(struct fw_reass), M_TEMP, M_NOWAIT);
352 if (!r) {
353 m_freem(m);
354 return 0;
355 }
356 r->fr_id = id;
357 r->fr_frags = 0;
358 STAILQ_INSERT_HEAD(&fc->fc_frags, r, fr_link);
359 }
360
361 /*
362 * If this fragment overlaps any other fragment, we must discard
363 * the partial reassembly and start again.
364 */
365 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
366 fstart = 0;
367 else
368 fstart = enc->nextfrag.fragment_offset;
369 fend = fstart + m->m_pkthdr.len - 2*sizeof(uint32_t);
370 dsize = enc->nextfrag.datagram_size;
371 islast = (enc->nextfrag.lf == FW_ENCAP_LAST);
372
373 for (mf = r->fr_frags; mf; mf = mf->m_nextpkt) {
374 enc = mtod(mf, union fw_encap *);
375 if (enc->nextfrag.datagram_size != dsize) {
376 /*
377 * This fragment must be from a different
378 * packet.
379 */
380 goto bad;
381 }
382 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
383 start = 0;
384 else
385 start = enc->nextfrag.fragment_offset;
386 end = start + mf->m_pkthdr.len - 2*sizeof(uint32_t);
387 if ((fstart < end && fend > start) ||
388 (islast && enc->nextfrag.lf == FW_ENCAP_LAST)) {
389 /*
390 * Overlap - discard reassembly buffer and start
391 * again with this fragment.
392 */
393 goto bad;
394 }
395 }
396
397 /*
398 * Find where to put this fragment in the list.
399 */
400 for (mf = r->fr_frags, mprev = NULL; mf;
401 mprev = mf, mf = mf->m_nextpkt) {
402 enc = mtod(mf, union fw_encap *);
403 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
404 start = 0;
405 else
406 start = enc->nextfrag.fragment_offset;
407 if (start >= fend)
408 break;
409 }
410
411 /*
412 * If this is a last fragment and we are not adding at the end
413 * of the list, discard the buffer.
414 */
415 if (islast && mprev && mprev->m_nextpkt)
416 goto bad;
417
418 if (mprev) {
419 m->m_nextpkt = mprev->m_nextpkt;
420 mprev->m_nextpkt = m;
421
422 /*
423 * Coalesce forwards and see if we can make a whole
424 * datagram.
425 */
426 enc = mtod(mprev, union fw_encap *);
427 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
428 start = 0;
429 else
430 start = enc->nextfrag.fragment_offset;
431 end = start + mprev->m_pkthdr.len - 2*sizeof(uint32_t);
432 while (end == fstart) {
433 /*
434 * Strip off the encap header from m and
435 * append it to mprev, freeing m.
436 */
437 m_adj(m, 2*sizeof(uint32_t));
438 mprev->m_nextpkt = m->m_nextpkt;
439 mprev->m_pkthdr.len += m->m_pkthdr.len;
440 m_cat(mprev, m);
441
442 if (mprev->m_pkthdr.len == dsize + 1 + 2*sizeof(uint32_t)) {
443 /*
444 * We have assembled a complete packet
445 * we must be finished. Make sure we have
446 * merged the whole chain.
447 */
448 STAILQ_REMOVE(&fc->fc_frags, r, fw_reass, fr_link);
449 free(r, M_TEMP);
450 m = mprev->m_nextpkt;
451 while (m) {
452 mf = m->m_nextpkt;
453 m_freem(m);
454 m = mf;
455 }
456 mprev->m_nextpkt = NULL;
457
458 return (mprev);
459 }
460
461 /*
462 * See if we can continue merging forwards.
463 */
464 end = fend;
465 m = mprev->m_nextpkt;
466 if (m) {
467 enc = mtod(m, union fw_encap *);
468 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
469 fstart = 0;
470 else
471 fstart = enc->nextfrag.fragment_offset;
472 fend = fstart + m->m_pkthdr.len
473 - 2*sizeof(uint32_t);
474 } else {
475 break;
476 }
477 }
478 } else {
479 m->m_nextpkt = 0;
480 r->fr_frags = m;
481 }
482
483 return (0);
484
485 bad:
486 while (r->fr_frags) {
487 mf = r->fr_frags;
488 r->fr_frags = mf->m_nextpkt;
489 m_freem(mf);
490 }
491 m->m_nextpkt = 0;
492 r->fr_frags = m;
493
494 return (0);
495 }
496
497 void
498 firewire_input(struct ifnet *ifp, struct mbuf *m, uint16_t src)
499 {
500 struct fw_com *fc = IFP2FWC(ifp);
501 union fw_encap *enc;
502 int type, isr;
503
504 GIANT_REQUIRED;
505
506 /*
507 * The caller has already stripped off the packet header
508 * (stream or wreqb) and marked the mbuf's M_BCAST flag
509 * appropriately. We de-encapsulate the IP packet and pass it
510 * up the line after handling link-level fragmentation.
511 */
512 if (m->m_pkthdr.len < sizeof(uint32_t)) {
513 if_printf(ifp, "discarding frame without "
514 "encapsulation header (len %u pkt len %u)\n",
515 m->m_len, m->m_pkthdr.len);
516 }
517
518 m = m_pullup(m, sizeof(uint32_t));
519 enc = mtod(m, union fw_encap *);
520
521 /*
522 * Byte swap the encapsulation header manually.
523 */
524 enc->ul[0] = ntohl(enc->ul[0]);
525
526 if (enc->unfrag.lf != 0) {
527 m = m_pullup(m, 2*sizeof(uint32_t));
528 if (!m)
529 return;
530 enc = mtod(m, union fw_encap *);
531 enc->ul[1] = ntohl(enc->ul[1]);
532 m = firewire_input_fragment(fc, m, src);
533 if (!m)
534 return;
535 enc = mtod(m, union fw_encap *);
536 type = enc->firstfrag.ether_type;
537 m_adj(m, 2*sizeof(uint32_t));
538 } else {
539 type = enc->unfrag.ether_type;
540 m_adj(m, sizeof(uint32_t));
541 }
542
543 if (m->m_pkthdr.rcvif == NULL) {
544 if_printf(ifp, "discard frame w/o interface pointer\n");
545 ifp->if_ierrors++;
546 m_freem(m);
547 return;
548 }
549 #ifdef DIAGNOSTIC
550 if (m->m_pkthdr.rcvif != ifp) {
551 if_printf(ifp, "Warning, frame marked as received on %s\n",
552 m->m_pkthdr.rcvif->if_xname);
553 }
554 #endif
555
556 #ifdef MAC
557 /*
558 * Tag the mbuf with an appropriate MAC label before any other
559 * consumers can get to it.
560 */
561 mac_create_mbuf_from_ifnet(ifp, m);
562 #endif
563
564 /*
565 * Give bpf a chance at the packet. The link-level driver
566 * should have left us a tag with the EUID of the sender.
567 */
568 if (bpf_peers_present(ifp->if_bpf)) {
569 struct fw_bpfhdr h;
570 struct m_tag *mtag;
571
572 mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_SENDER_EUID, 0);
573 if (mtag)
574 bcopy(mtag + 1, h.firewire_shost, 8);
575 else
576 bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8);
577 bcopy(&fc->fc_hwaddr, h.firewire_dhost, 8);
578 h.firewire_type = htons(type);
579 bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m);
580 }
581
582 if (ifp->if_flags & IFF_MONITOR) {
583 /*
584 * Interface marked for monitoring; discard packet.
585 */
586 m_freem(m);
587 return;
588 }
589
590 ifp->if_ibytes += m->m_pkthdr.len;
591
592 /* Discard packet if interface is not up */
593 if ((ifp->if_flags & IFF_UP) == 0) {
594 m_freem(m);
595 return;
596 }
597
598 if (m->m_flags & (M_BCAST|M_MCAST))
599 ifp->if_imcasts++;
600
601 switch (type) {
602 #ifdef INET
603 case ETHERTYPE_IP:
604 if (ip_fastforward(m))
605 return;
606 isr = NETISR_IP;
607 break;
608
609 case ETHERTYPE_ARP:
610 {
611 struct arphdr *ah;
612 ah = mtod(m, struct arphdr *);
613
614 /*
615 * Adjust the arp packet to insert an empty tha slot.
616 */
617 m->m_len += ah->ar_hln;
618 m->m_pkthdr.len += ah->ar_hln;
619 bcopy(ar_tha(ah), ar_tpa(ah), ah->ar_pln);
620 isr = NETISR_ARP;
621 break;
622 }
623 #endif
624
625 #ifdef INET6
626 case ETHERTYPE_IPV6:
627 isr = NETISR_IPV6;
628 break;
629 #endif
630
631 default:
632 m_freem(m);
633 return;
634 }
635
636 netisr_dispatch(isr, m);
637 }
638
639 int
640 firewire_ioctl(struct ifnet *ifp, int command, caddr_t data)
641 {
642 struct ifaddr *ifa = (struct ifaddr *) data;
643 struct ifreq *ifr = (struct ifreq *) data;
644 int error = 0;
645
646 switch (command) {
647 case SIOCSIFADDR:
648 ifp->if_flags |= IFF_UP;
649
650 switch (ifa->ifa_addr->sa_family) {
651 #ifdef INET
652 case AF_INET:
653 ifp->if_init(ifp->if_softc); /* before arpwhohas */
654 arp_ifinit(ifp, ifa);
655 break;
656 #endif
657 default:
658 ifp->if_init(ifp->if_softc);
659 break;
660 }
661 break;
662
663 case SIOCGIFADDR:
664 {
665 struct sockaddr *sa;
666
667 sa = (struct sockaddr *) & ifr->ifr_data;
668 bcopy(&IFP2FWC(ifp)->fc_hwaddr,
669 (caddr_t) sa->sa_data, sizeof(struct fw_hwaddr));
670 }
671 break;
672
673 case SIOCSIFMTU:
674 /*
675 * Set the interface MTU.
676 */
677 if (ifr->ifr_mtu > 1500) {
678 error = EINVAL;
679 } else {
680 ifp->if_mtu = ifr->ifr_mtu;
681 }
682 break;
683 default:
684 error = EINVAL; /* XXX netbsd has ENOTTY??? */
685 break;
686 }
687 return (error);
688 }
689
690 static int
691 firewire_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa,
692 struct sockaddr *sa)
693 {
694 #ifdef INET
695 struct sockaddr_in *sin;
696 #endif
697 #ifdef INET6
698 struct sockaddr_in6 *sin6;
699 #endif
700
701 switch(sa->sa_family) {
702 case AF_LINK:
703 /*
704 * No mapping needed.
705 */
706 *llsa = 0;
707 return 0;
708
709 #ifdef INET
710 case AF_INET:
711 sin = (struct sockaddr_in *)sa;
712 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
713 return EADDRNOTAVAIL;
714 *llsa = 0;
715 return 0;
716 #endif
717 #ifdef INET6
718 case AF_INET6:
719 sin6 = (struct sockaddr_in6 *)sa;
720 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
721 /*
722 * An IP6 address of 0 means listen to all
723 * of the Ethernet multicast address used for IP6.
724 * (This is used for multicast routers.)
725 */
726 ifp->if_flags |= IFF_ALLMULTI;
727 *llsa = 0;
728 return 0;
729 }
730 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
731 return EADDRNOTAVAIL;
732 *llsa = 0;
733 return 0;
734 #endif
735
736 default:
737 /*
738 * Well, the text isn't quite right, but it's the name
739 * that counts...
740 */
741 return EAFNOSUPPORT;
742 }
743 }
744
745 void
746 firewire_ifattach(struct ifnet *ifp, struct fw_hwaddr *llc)
747 {
748 struct fw_com *fc = IFP2FWC(ifp);
749 struct ifaddr *ifa;
750 struct sockaddr_dl *sdl;
751 static const char* speeds[] = {
752 "S100", "S200", "S400", "S800",
753 "S1600", "S3200"
754 };
755
756 fc->fc_speed = llc->sspd;
757 STAILQ_INIT(&fc->fc_frags);
758
759 ifp->if_addrlen = sizeof(struct fw_hwaddr);
760 ifp->if_hdrlen = 0;
761 if_attach(ifp);
762 ifp->if_mtu = 1500; /* XXX */
763 ifp->if_output = firewire_output;
764 ifp->if_resolvemulti = firewire_resolvemulti;
765 ifp->if_broadcastaddr = (u_char *) &firewire_broadcastaddr;
766
767 ifa = ifaddr_byindex(ifp->if_index);
768 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
769 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
770 sdl->sdl_type = IFT_IEEE1394;
771 sdl->sdl_alen = ifp->if_addrlen;
772 bcopy(llc, LLADDR(sdl), ifp->if_addrlen);
773
774 bpfattach(ifp, DLT_APPLE_IP_OVER_IEEE1394,
775 sizeof(struct fw_hwaddr));
776
777 if_printf(ifp, "Firewire address: %8D @ 0x%04x%08x, %s, maxrec %d\n",
778 (uint8_t *) &llc->sender_unique_ID_hi, ":",
779 ntohs(llc->sender_unicast_FIFO_hi),
780 ntohl(llc->sender_unicast_FIFO_lo),
781 speeds[llc->sspd],
782 (2 << llc->sender_max_rec));
783 }
784
785 void
786 firewire_ifdetach(struct ifnet *ifp)
787 {
788 bpfdetach(ifp);
789 if_detach(ifp);
790 }
791
792 void
793 firewire_busreset(struct ifnet *ifp)
794 {
795 struct fw_com *fc = IFP2FWC(ifp);
796 struct fw_reass *r;
797 struct mbuf *m;
798
799 /*
800 * Discard any partial datagrams since the host ids may have changed.
801 */
802 while ((r = STAILQ_FIRST(&fc->fc_frags))) {
803 STAILQ_REMOVE_HEAD(&fc->fc_frags, fr_link);
804 while (r->fr_frags) {
805 m = r->fr_frags;
806 r->fr_frags = m->m_nextpkt;
807 m_freem(m);
808 }
809 free(r, M_TEMP);
810 }
811 }
812
813 static void *
814 firewire_alloc(u_char type, struct ifnet *ifp)
815 {
816 struct fw_com *fc;
817
818 fc = malloc(sizeof(struct fw_com), M_FWCOM, M_WAITOK | M_ZERO);
819 fc->fc_ifp = ifp;
820
821 return (fc);
822 }
823
824 static void
825 firewire_free(void *com, u_char type)
826 {
827
828 free(com, M_FWCOM);
829 }
830
831 static int
832 firewire_modevent(module_t mod, int type, void *data)
833 {
834
835 switch (type) {
836 case MOD_LOAD:
837 if_register_com_alloc(IFT_IEEE1394,
838 firewire_alloc, firewire_free);
839 break;
840 case MOD_UNLOAD:
841 if_deregister_com_alloc(IFT_IEEE1394);
842 break;
843 default:
844 return (EOPNOTSUPP);
845 }
846
847 return (0);
848 }
849
850 static moduledata_t firewire_mod = {
851 "if_firewire",
852 firewire_modevent,
853 0
854 };
855
856 DECLARE_MODULE(if_firewire, firewire_mod, SI_SUB_INIT_IF, SI_ORDER_ANY);
857 MODULE_VERSION(if_firewire, 1);
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