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/6.0/sys/net/if_fwsubr.c 151830 2005-10-28 22:52:31Z avatar $
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 #define IFP2FC(IFP) ((struct fw_com *)IFP)
66
67 MALLOC_DEFINE(M_FWCOM, "fw_com", "firewire interface internals");
68
69 struct fw_hwaddr firewire_broadcastaddr = {
70 0xffffffff,
71 0xffffffff,
72 0xff,
73 0xff,
74 0xffff,
75 0xffffffff
76 };
77
78 static int
79 firewire_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
80 struct rtentry *rt0)
81 {
82 struct fw_com *fc = IFP2FC(ifp);
83 int error, type;
84 struct rtentry *rt = NULL;
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
94 #ifdef MAC
95 error = mac_check_ifnet_transmit(ifp, m);
96 if (error)
97 goto bad;
98 #endif
99
100 if (!((ifp->if_flags & IFF_UP) &&
101 (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
102 error = ENETDOWN;
103 goto bad;
104 }
105
106 if (rt0 != NULL) {
107 error = rt_check(&rt, &rt0, dst);
108 if (error)
109 goto bad;
110 RT_UNLOCK(rt);
111 }
112
113 /*
114 * For unicast, we make a tag to store the lladdr of the
115 * destination. This might not be the first time we have seen
116 * the packet (for instance, the arp code might be trying to
117 * re-send it after receiving an arp reply) so we only
118 * allocate a tag if there isn't one there already. For
119 * multicast, we will eventually use a different tag to store
120 * the channel number.
121 */
122 unicast = !(m->m_flags & (M_BCAST | M_MCAST));
123 if (unicast) {
124 mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, NULL);
125 if (!mtag) {
126 mtag = m_tag_alloc(MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR,
127 sizeof (struct fw_hwaddr), M_NOWAIT);
128 if (!mtag) {
129 error = ENOMEM;
130 goto bad;
131 }
132 m_tag_prepend(m, mtag);
133 }
134 destfw = (struct fw_hwaddr *)(mtag + 1);
135 } else {
136 destfw = 0;
137 }
138
139 switch (dst->sa_family) {
140 #ifdef AF_INET
141 case AF_INET:
142 /*
143 * Only bother with arp for unicast. Allocation of
144 * channels etc. for firewire is quite different and
145 * doesn't fit into the arp model.
146 */
147 if (unicast) {
148 error = arpresolve(ifp, rt, m, dst, (u_char *) destfw);
149 if (error)
150 return (error == EWOULDBLOCK ? 0 : error);
151 }
152 type = ETHERTYPE_IP;
153 break;
154
155 case AF_ARP:
156 {
157 struct arphdr *ah;
158 ah = mtod(m, struct arphdr *);
159 ah->ar_hrd = htons(ARPHRD_IEEE1394);
160 type = ETHERTYPE_ARP;
161 if (unicast)
162 *destfw = *(struct fw_hwaddr *) ar_tha(ah);
163
164 /*
165 * The standard arp code leaves a hole for the target
166 * hardware address which we need to close up.
167 */
168 bcopy(ar_tpa(ah), ar_tha(ah), ah->ar_pln);
169 m_adj(m, -ah->ar_hln);
170 break;
171 }
172 #endif
173
174 #ifdef INET6
175 case AF_INET6:
176 if (unicast) {
177 error = nd6_storelladdr(fc->fc_ifp, rt, m, dst,
178 (u_char *) destfw);
179 if (error)
180 return (error);
181 }
182 type = ETHERTYPE_IPV6;
183 break;
184 #endif
185
186 default:
187 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
188 error = EAFNOSUPPORT;
189 goto bad;
190 }
191
192 /*
193 * Let BPF tap off a copy before we encapsulate.
194 */
195 if (ifp->if_bpf) {
196 struct fw_bpfhdr h;
197 if (unicast)
198 bcopy(destfw, h.firewire_dhost, 8);
199 else
200 bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8);
201 bcopy(&fc->fc_hwaddr, h.firewire_shost, 8);
202 h.firewire_type = htons(type);
203 bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m);
204 }
205
206 /*
207 * Punt on MCAP for now and send all multicast packets on the
208 * broadcast channel.
209 */
210 if (m->m_flags & M_MCAST)
211 m->m_flags |= M_BCAST;
212
213 /*
214 * Figure out what speed to use and what the largest supported
215 * packet size is. For unicast, this is the minimum of what we
216 * can speak and what they can hear. For broadcast, lets be
217 * conservative and use S100. We could possibly improve that
218 * by examining the bus manager's speed map or similar. We
219 * also reduce the packet size for broadcast to account for
220 * the GASP header.
221 */
222 if (unicast) {
223 speed = min(fc->fc_speed, destfw->sspd);
224 psize = min(512 << speed, 2 << destfw->sender_max_rec);
225 } else {
226 speed = 0;
227 psize = 512 - 2*sizeof(uint32_t);
228 }
229
230 /*
231 * Next, we encapsulate, possibly fragmenting the original
232 * datagram if it won't fit into a single packet.
233 */
234 if (m->m_pkthdr.len <= psize - sizeof(uint32_t)) {
235 /*
236 * No fragmentation is necessary.
237 */
238 M_PREPEND(m, sizeof(uint32_t), M_DONTWAIT);
239 if (!m) {
240 error = ENOBUFS;
241 goto bad;
242 }
243 enc = mtod(m, union fw_encap *);
244 enc->unfrag.ether_type = type;
245 enc->unfrag.lf = FW_ENCAP_UNFRAG;
246 enc->unfrag.reserved = 0;
247
248 /*
249 * Byte swap the encapsulation header manually.
250 */
251 enc->ul[0] = htonl(enc->ul[0]);
252
253 IFQ_HANDOFF(ifp, m, error);
254 return (error);
255 } else {
256 /*
257 * Fragment the datagram, making sure to leave enough
258 * space for the encapsulation header in each packet.
259 */
260 fsize = psize - 2*sizeof(uint32_t);
261 dgl = next_dgl++;
262 dsize = m->m_pkthdr.len;
263 foff = 0;
264 while (m) {
265 if (m->m_pkthdr.len > fsize) {
266 /*
267 * Split off the tail segment from the
268 * datagram, copying our tags over.
269 */
270 mtail = m_split(m, fsize, M_DONTWAIT);
271 m_tag_copy_chain(mtail, m, M_NOWAIT);
272 } else {
273 mtail = 0;
274 }
275
276 /*
277 * Add our encapsulation header to this
278 * fragment and hand it off to the link.
279 */
280 M_PREPEND(m, 2*sizeof(uint32_t), M_DONTWAIT);
281 if (!m) {
282 error = ENOBUFS;
283 goto bad;
284 }
285 enc = mtod(m, union fw_encap *);
286 if (foff == 0) {
287 enc->firstfrag.lf = FW_ENCAP_FIRST;
288 enc->firstfrag.reserved1 = 0;
289 enc->firstfrag.reserved2 = 0;
290 enc->firstfrag.datagram_size = dsize - 1;
291 enc->firstfrag.ether_type = type;
292 enc->firstfrag.dgl = dgl;
293 } else {
294 if (mtail)
295 enc->nextfrag.lf = FW_ENCAP_NEXT;
296 else
297 enc->nextfrag.lf = FW_ENCAP_LAST;
298 enc->nextfrag.reserved1 = 0;
299 enc->nextfrag.reserved2 = 0;
300 enc->nextfrag.reserved3 = 0;
301 enc->nextfrag.datagram_size = dsize - 1;
302 enc->nextfrag.fragment_offset = foff;
303 enc->nextfrag.dgl = dgl;
304 }
305 foff += m->m_pkthdr.len - 2*sizeof(uint32_t);
306
307 /*
308 * Byte swap the encapsulation header manually.
309 */
310 enc->ul[0] = htonl(enc->ul[0]);
311 enc->ul[1] = htonl(enc->ul[1]);
312
313 IFQ_HANDOFF(ifp, m, error);
314 if (error) {
315 if (mtail)
316 m_freem(mtail);
317 return (ENOBUFS);
318 }
319
320 m = mtail;
321 }
322
323 return (0);
324 }
325
326 bad:
327 if (m)
328 m_freem(m);
329 return (error);
330 }
331
332 static struct mbuf *
333 firewire_input_fragment(struct fw_com *fc, struct mbuf *m, int src)
334 {
335 union fw_encap *enc;
336 struct fw_reass *r;
337 struct mbuf *mf, *mprev;
338 int dsize;
339 int fstart, fend, start, end, islast;
340 uint32_t id;
341
342 GIANT_REQUIRED;
343
344 /*
345 * Find an existing reassembly buffer or create a new one.
346 */
347 enc = mtod(m, union fw_encap *);
348 id = enc->firstfrag.dgl | (src << 16);
349 STAILQ_FOREACH(r, &fc->fc_frags, fr_link)
350 if (r->fr_id == id)
351 break;
352 if (!r) {
353 r = malloc(sizeof(struct fw_reass), M_TEMP, M_NOWAIT);
354 if (!r) {
355 m_freem(m);
356 return 0;
357 }
358 r->fr_id = id;
359 r->fr_frags = 0;
360 STAILQ_INSERT_HEAD(&fc->fc_frags, r, fr_link);
361 }
362
363 /*
364 * If this fragment overlaps any other fragment, we must discard
365 * the partial reassembly and start again.
366 */
367 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
368 fstart = 0;
369 else
370 fstart = enc->nextfrag.fragment_offset;
371 fend = fstart + m->m_pkthdr.len - 2*sizeof(uint32_t);
372 dsize = enc->nextfrag.datagram_size;
373 islast = (enc->nextfrag.lf == FW_ENCAP_LAST);
374
375 for (mf = r->fr_frags; mf; mf = mf->m_nextpkt) {
376 enc = mtod(mf, union fw_encap *);
377 if (enc->nextfrag.datagram_size != dsize) {
378 /*
379 * This fragment must be from a different
380 * packet.
381 */
382 goto bad;
383 }
384 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
385 start = 0;
386 else
387 start = enc->nextfrag.fragment_offset;
388 end = start + mf->m_pkthdr.len - 2*sizeof(uint32_t);
389 if ((fstart < end && fend > start) ||
390 (islast && enc->nextfrag.lf == FW_ENCAP_LAST)) {
391 /*
392 * Overlap - discard reassembly buffer and start
393 * again with this fragment.
394 */
395 goto bad;
396 }
397 }
398
399 /*
400 * Find where to put this fragment in the list.
401 */
402 for (mf = r->fr_frags, mprev = NULL; mf;
403 mprev = mf, mf = mf->m_nextpkt) {
404 enc = mtod(mf, union fw_encap *);
405 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
406 start = 0;
407 else
408 start = enc->nextfrag.fragment_offset;
409 if (start >= fend)
410 break;
411 }
412
413 /*
414 * If this is a last fragment and we are not adding at the end
415 * of the list, discard the buffer.
416 */
417 if (islast && mprev && mprev->m_nextpkt)
418 goto bad;
419
420 if (mprev) {
421 m->m_nextpkt = mprev->m_nextpkt;
422 mprev->m_nextpkt = m;
423
424 /*
425 * Coalesce forwards and see if we can make a whole
426 * datagram.
427 */
428 enc = mtod(mprev, union fw_encap *);
429 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
430 start = 0;
431 else
432 start = enc->nextfrag.fragment_offset;
433 end = start + mprev->m_pkthdr.len - 2*sizeof(uint32_t);
434 while (end == fstart) {
435 /*
436 * Strip off the encap header from m and
437 * append it to mprev, freeing m.
438 */
439 m_adj(m, 2*sizeof(uint32_t));
440 mprev->m_nextpkt = m->m_nextpkt;
441 mprev->m_pkthdr.len += m->m_pkthdr.len;
442 m_cat(mprev, m);
443
444 if (mprev->m_pkthdr.len == dsize + 1 + 2*sizeof(uint32_t)) {
445 /*
446 * We have assembled a complete packet
447 * we must be finished. Make sure we have
448 * merged the whole chain.
449 */
450 STAILQ_REMOVE(&fc->fc_frags, r, fw_reass, fr_link);
451 free(r, M_TEMP);
452 m = mprev->m_nextpkt;
453 while (m) {
454 mf = m->m_nextpkt;
455 m_freem(m);
456 m = mf;
457 }
458 mprev->m_nextpkt = NULL;
459
460 return (mprev);
461 }
462
463 /*
464 * See if we can continue merging forwards.
465 */
466 end = fend;
467 m = mprev->m_nextpkt;
468 if (m) {
469 enc = mtod(m, union fw_encap *);
470 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
471 fstart = 0;
472 else
473 fstart = enc->nextfrag.fragment_offset;
474 fend = fstart + m->m_pkthdr.len
475 - 2*sizeof(uint32_t);
476 } else {
477 break;
478 }
479 }
480 } else {
481 m->m_nextpkt = 0;
482 r->fr_frags = m;
483 }
484
485 return (0);
486
487 bad:
488 while (r->fr_frags) {
489 mf = r->fr_frags;
490 r->fr_frags = mf->m_nextpkt;
491 m_freem(mf);
492 }
493 m->m_nextpkt = 0;
494 r->fr_frags = m;
495
496 return (0);
497 }
498
499 void
500 firewire_input(struct ifnet *ifp, struct mbuf *m, uint16_t src)
501 {
502 struct fw_com *fc = IFP2FC(ifp);
503 union fw_encap *enc;
504 int type, isr;
505
506 GIANT_REQUIRED;
507
508 /*
509 * The caller has already stripped off the packet header
510 * (stream or wreqb) and marked the mbuf's M_BCAST flag
511 * appropriately. We de-encapsulate the IP packet and pass it
512 * up the line after handling link-level fragmentation.
513 */
514 if (m->m_pkthdr.len < sizeof(uint32_t)) {
515 if_printf(ifp, "discarding frame without "
516 "encapsulation header (len %u pkt len %u)\n",
517 m->m_len, m->m_pkthdr.len);
518 }
519
520 m = m_pullup(m, sizeof(uint32_t));
521 enc = mtod(m, union fw_encap *);
522
523 /*
524 * Byte swap the encapsulation header manually.
525 */
526 enc->ul[0] = htonl(enc->ul[0]);
527
528 if (enc->unfrag.lf != 0) {
529 m = m_pullup(m, 2*sizeof(uint32_t));
530 if (!m)
531 return;
532 enc = mtod(m, union fw_encap *);
533 enc->ul[1] = htonl(enc->ul[1]);
534 m = firewire_input_fragment(fc, m, src);
535 if (!m)
536 return;
537 enc = mtod(m, union fw_encap *);
538 type = enc->firstfrag.ether_type;
539 m_adj(m, 2*sizeof(uint32_t));
540 } else {
541 type = enc->unfrag.ether_type;
542 m_adj(m, sizeof(uint32_t));
543 }
544
545 if (m->m_pkthdr.rcvif == NULL) {
546 if_printf(ifp, "discard frame w/o interface pointer\n");
547 ifp->if_ierrors++;
548 m_freem(m);
549 return;
550 }
551 #ifdef DIAGNOSTIC
552 if (m->m_pkthdr.rcvif != ifp) {
553 if_printf(ifp, "Warning, frame marked as received on %s\n",
554 m->m_pkthdr.rcvif->if_xname);
555 }
556 #endif
557
558 #ifdef MAC
559 /*
560 * Tag the mbuf with an appropriate MAC label before any other
561 * consumers can get to it.
562 */
563 mac_create_mbuf_from_ifnet(ifp, m);
564 #endif
565
566 /*
567 * Give bpf a chance at the packet. The link-level driver
568 * should have left us a tag with the EUID of the sender.
569 */
570 if (ifp->if_bpf) {
571 struct fw_bpfhdr h;
572 struct m_tag *mtag;
573
574 mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_SENDER_EUID, 0);
575 if (mtag)
576 bcopy(mtag + 1, h.firewire_shost, 8);
577 else
578 bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8);
579 bcopy(&fc->fc_hwaddr, h.firewire_dhost, 8);
580 h.firewire_type = htons(type);
581 bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m);
582 }
583
584 if (ifp->if_flags & IFF_MONITOR) {
585 /*
586 * Interface marked for monitoring; discard packet.
587 */
588 m_freem(m);
589 return;
590 }
591
592 ifp->if_ibytes += m->m_pkthdr.len;
593
594 /* Discard packet if interface is not up */
595 if ((ifp->if_flags & IFF_UP) == 0) {
596 m_freem(m);
597 return;
598 }
599
600 if (m->m_flags & (M_BCAST|M_MCAST))
601 ifp->if_imcasts++;
602
603 switch (type) {
604 #ifdef INET
605 case ETHERTYPE_IP:
606 if (ip_fastforward(m))
607 return;
608 isr = NETISR_IP;
609 break;
610
611 case ETHERTYPE_ARP:
612 {
613 struct arphdr *ah;
614 ah = mtod(m, struct arphdr *);
615
616 /*
617 * Adjust the arp packet to insert an empty tha slot.
618 */
619 m->m_len += ah->ar_hln;
620 m->m_pkthdr.len += ah->ar_hln;
621 bcopy(ar_tha(ah), ar_tpa(ah), ah->ar_pln);
622 isr = NETISR_ARP;
623 break;
624 }
625 #endif
626
627 #ifdef INET6
628 case ETHERTYPE_IPV6:
629 isr = NETISR_IPV6;
630 break;
631 #endif
632
633 default:
634 m_freem(m);
635 return;
636 }
637
638 netisr_dispatch(isr, m);
639 }
640
641 int
642 firewire_ioctl(struct ifnet *ifp, int command, caddr_t data)
643 {
644 struct ifaddr *ifa = (struct ifaddr *) data;
645 struct ifreq *ifr = (struct ifreq *) data;
646 int error = 0;
647
648 switch (command) {
649 case SIOCSIFADDR:
650 ifp->if_flags |= IFF_UP;
651
652 switch (ifa->ifa_addr->sa_family) {
653 #ifdef INET
654 case AF_INET:
655 ifp->if_init(ifp->if_softc); /* before arpwhohas */
656 arp_ifinit(ifp, ifa);
657 break;
658 #endif
659 default:
660 ifp->if_init(ifp->if_softc);
661 break;
662 }
663 break;
664
665 case SIOCGIFADDR:
666 {
667 struct sockaddr *sa;
668
669 sa = (struct sockaddr *) & ifr->ifr_data;
670 bcopy(&IFP2FC(ifp)->fc_hwaddr,
671 (caddr_t) sa->sa_data, sizeof(struct fw_hwaddr));
672 }
673 break;
674
675 case SIOCSIFMTU:
676 /*
677 * Set the interface MTU.
678 */
679 if (ifr->ifr_mtu > 1500) {
680 error = EINVAL;
681 } else {
682 ifp->if_mtu = ifr->ifr_mtu;
683 }
684 break;
685 default:
686 error = EINVAL; /* XXX netbsd has ENOTTY??? */
687 break;
688 }
689 return (error);
690 }
691
692 static int
693 firewire_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa,
694 struct sockaddr *sa)
695 {
696 #ifdef INET
697 struct sockaddr_in *sin;
698 #endif
699 #ifdef INET6
700 struct sockaddr_in6 *sin6;
701 #endif
702
703 switch(sa->sa_family) {
704 case AF_LINK:
705 /*
706 * No mapping needed.
707 */
708 *llsa = 0;
709 return 0;
710
711 #ifdef INET
712 case AF_INET:
713 sin = (struct sockaddr_in *)sa;
714 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
715 return EADDRNOTAVAIL;
716 *llsa = 0;
717 return 0;
718 #endif
719 #ifdef INET6
720 case AF_INET6:
721 sin6 = (struct sockaddr_in6 *)sa;
722 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
723 /*
724 * An IP6 address of 0 means listen to all
725 * of the Ethernet multicast address used for IP6.
726 * (This is used for multicast routers.)
727 */
728 ifp->if_flags |= IFF_ALLMULTI;
729 *llsa = 0;
730 return 0;
731 }
732 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
733 return EADDRNOTAVAIL;
734 *llsa = 0;
735 return 0;
736 #endif
737
738 default:
739 /*
740 * Well, the text isn't quite right, but it's the name
741 * that counts...
742 */
743 return EAFNOSUPPORT;
744 }
745 }
746
747 void
748 firewire_ifattach(struct ifnet *ifp, struct fw_hwaddr *llc)
749 {
750 struct fw_com *fc = IFP2FC(ifp);
751 struct ifaddr *ifa;
752 struct sockaddr_dl *sdl;
753 static const char* speeds[] = {
754 "S100", "S200", "S400", "S800",
755 "S1600", "S3200"
756 };
757
758 fc->fc_speed = llc->sspd;
759 STAILQ_INIT(&fc->fc_frags);
760
761 ifp->if_addrlen = sizeof(struct fw_hwaddr);
762 ifp->if_hdrlen = 0;
763 if_attach(ifp);
764 ifp->if_mtu = 1500; /* XXX */
765 ifp->if_output = firewire_output;
766 ifp->if_resolvemulti = firewire_resolvemulti;
767 ifp->if_broadcastaddr = (u_char *) &firewire_broadcastaddr;
768
769 ifa = ifaddr_byindex(ifp->if_index);
770 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
771 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
772 sdl->sdl_type = IFT_IEEE1394;
773 sdl->sdl_alen = ifp->if_addrlen;
774 bcopy(llc, LLADDR(sdl), ifp->if_addrlen);
775
776 bpfattach(ifp, DLT_APPLE_IP_OVER_IEEE1394,
777 sizeof(struct fw_hwaddr));
778
779 if_printf(ifp, "Firewire address: %8D @ 0x%04x%08x, %s, maxrec %d\n",
780 (uint8_t *) &llc->sender_unique_ID_hi, ":",
781 ntohs(llc->sender_unicast_FIFO_hi),
782 ntohl(llc->sender_unicast_FIFO_lo),
783 speeds[llc->sspd],
784 (2 << llc->sender_max_rec));
785 }
786
787 void
788 firewire_ifdetach(struct ifnet *ifp)
789 {
790 bpfdetach(ifp);
791 if_detach(ifp);
792 }
793
794 void
795 firewire_busreset(struct ifnet *ifp)
796 {
797 struct fw_com *fc = IFP2FC(ifp);
798 struct fw_reass *r;
799 struct mbuf *m;
800
801 /*
802 * Discard any partial datagrams since the host ids may have changed.
803 */
804 while ((r = STAILQ_FIRST(&fc->fc_frags))) {
805 STAILQ_REMOVE_HEAD(&fc->fc_frags, fr_link);
806 while (r->fr_frags) {
807 m = r->fr_frags;
808 r->fr_frags = m->m_nextpkt;
809 m_freem(m);
810 }
811 free(r, M_TEMP);
812 }
813 }
814
815 static void *
816 firewire_alloc(u_char type, struct ifnet *ifp)
817 {
818 struct fw_com *fc;
819
820 fc = malloc(sizeof(struct fw_com), M_FWCOM, M_WAITOK | M_ZERO);
821 fc->fc_ifp = ifp;
822
823 return (fc);
824 }
825
826 static void
827 firewire_free(void *com, u_char type)
828 {
829
830 free(com, M_FWCOM);
831 }
832
833 static int
834 firewire_modevent(module_t mod, int type, void *data)
835 {
836
837 switch (type) {
838 case MOD_LOAD:
839 if_register_com_alloc(IFT_IEEE1394,
840 firewire_alloc, firewire_free);
841 break;
842 case MOD_UNLOAD:
843 if_deregister_com_alloc(IFT_IEEE1394);
844 break;
845 default:
846 return (EOPNOTSUPP);
847 }
848
849 return (0);
850 }
851
852 static moduledata_t firewire_mod = {
853 "if_firewire",
854 firewire_modevent,
855 0
856 };
857
858 DECLARE_MODULE(if_firewire, firewire_mod, SI_SUB_INIT_IF, SI_ORDER_ANY);
859 MODULE_VERSION(if_firewire, 1);
Cache object: 7d19f9ae5588f4c0c838f751f8cf593d
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