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 * $FreeBSD$
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/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 #include <net/if_llatbl.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 #include <security/mac/mac_framework.h>
66
67 static 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, const struct sockaddr *dst,
80 struct route *ro)
81 {
82 struct fw_com *fc = IFP2FWC(ifp);
83 int error, type;
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 #if defined(INET) || defined(INET6)
93 int is_gw = 0;
94 #endif
95
96 #ifdef MAC
97 error = mac_ifnet_check_transmit(ifp, m);
98 if (error)
99 goto bad;
100 #endif
101
102 if (!((ifp->if_flags & IFF_UP) &&
103 (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
104 error = ENETDOWN;
105 goto bad;
106 }
107
108 #if defined(INET) || defined(INET6)
109 if (ro != NULL)
110 is_gw = (ro->ro_flags & RT_HAS_GW) != 0;
111 #endif
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 = NULL;
136 }
137
138 switch (dst->sa_family) {
139 #ifdef 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, is_gw, m, dst,
148 (u_char *) destfw, NULL, NULL);
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_resolve(fc->fc_ifp, is_gw, m, dst,
178 (u_char *) destfw, NULL, NULL);
179 if (error)
180 return (error == EWOULDBLOCK ? 0 : 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 (bpf_peers_present(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_NOWAIT);
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 error = (ifp->if_transmit)(ifp, m);
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_NOWAIT);
271 m_tag_copy_chain(mtail, m, M_NOWAIT);
272 } else {
273 mtail = NULL;
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_NOWAIT);
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 error = (ifp->if_transmit)(ifp, m);
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 /*
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 /*
505 * The caller has already stripped off the packet header
506 * (stream or wreqb) and marked the mbuf's M_BCAST flag
507 * appropriately. We de-encapsulate the IP packet and pass it
508 * up the line after handling link-level fragmentation.
509 */
510 if (m->m_pkthdr.len < sizeof(uint32_t)) {
511 if_printf(ifp, "discarding frame without "
512 "encapsulation header (len %u pkt len %u)\n",
513 m->m_len, m->m_pkthdr.len);
514 }
515
516 m = m_pullup(m, sizeof(uint32_t));
517 if (m == NULL)
518 return;
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 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
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_ifnet_create_mbuf(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 if_inc_counter(ifp, IFCOUNTER_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 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
600
601 switch (type) {
602 #ifdef INET
603 case ETHERTYPE_IP:
604 isr = NETISR_IP;
605 break;
606
607 case ETHERTYPE_ARP:
608 {
609 struct arphdr *ah;
610 ah = mtod(m, struct arphdr *);
611
612 /*
613 * Adjust the arp packet to insert an empty tha slot.
614 */
615 m->m_len += ah->ar_hln;
616 m->m_pkthdr.len += ah->ar_hln;
617 bcopy(ar_tha(ah), ar_tpa(ah), ah->ar_pln);
618 isr = NETISR_ARP;
619 break;
620 }
621 #endif
622
623 #ifdef INET6
624 case ETHERTYPE_IPV6:
625 isr = NETISR_IPV6;
626 break;
627 #endif
628
629 default:
630 m_freem(m);
631 return;
632 }
633
634 M_SETFIB(m, ifp->if_fib);
635 CURVNET_SET_QUIET(ifp->if_vnet);
636 netisr_dispatch(isr, m);
637 CURVNET_RESTORE();
638 }
639
640 int
641 firewire_ioctl(struct ifnet *ifp, u_long 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 bcopy(&IFP2FWC(ifp)->fc_hwaddr, &ifr->ifr_addr.sa_data[0],
666 sizeof(struct fw_hwaddr));
667 break;
668
669 case SIOCSIFMTU:
670 /*
671 * Set the interface MTU.
672 */
673 if (ifr->ifr_mtu > 1500) {
674 error = EINVAL;
675 } else {
676 ifp->if_mtu = ifr->ifr_mtu;
677 }
678 break;
679 default:
680 error = EINVAL; /* XXX netbsd has ENOTTY??? */
681 break;
682 }
683 return (error);
684 }
685
686 static int
687 firewire_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa,
688 struct sockaddr *sa)
689 {
690 #ifdef INET
691 struct sockaddr_in *sin;
692 #endif
693 #ifdef INET6
694 struct sockaddr_in6 *sin6;
695 #endif
696
697 switch(sa->sa_family) {
698 case AF_LINK:
699 /*
700 * No mapping needed.
701 */
702 *llsa = NULL;
703 return 0;
704
705 #ifdef INET
706 case AF_INET:
707 sin = (struct sockaddr_in *)sa;
708 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
709 return EADDRNOTAVAIL;
710 *llsa = NULL;
711 return 0;
712 #endif
713 #ifdef INET6
714 case AF_INET6:
715 sin6 = (struct sockaddr_in6 *)sa;
716 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
717 /*
718 * An IP6 address of 0 means listen to all
719 * of the Ethernet multicast address used for IP6.
720 * (This is used for multicast routers.)
721 */
722 ifp->if_flags |= IFF_ALLMULTI;
723 *llsa = NULL;
724 return 0;
725 }
726 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
727 return EADDRNOTAVAIL;
728 *llsa = NULL;
729 return 0;
730 #endif
731
732 default:
733 /*
734 * Well, the text isn't quite right, but it's the name
735 * that counts...
736 */
737 return EAFNOSUPPORT;
738 }
739 }
740
741 void
742 firewire_ifattach(struct ifnet *ifp, struct fw_hwaddr *llc)
743 {
744 struct fw_com *fc = IFP2FWC(ifp);
745 struct ifaddr *ifa;
746 struct sockaddr_dl *sdl;
747 static const char* speeds[] = {
748 "S100", "S200", "S400", "S800",
749 "S1600", "S3200"
750 };
751
752 fc->fc_speed = llc->sspd;
753 STAILQ_INIT(&fc->fc_frags);
754
755 ifp->if_addrlen = sizeof(struct fw_hwaddr);
756 ifp->if_hdrlen = 0;
757 if_attach(ifp);
758 ifp->if_mtu = 1500; /* XXX */
759 ifp->if_output = firewire_output;
760 ifp->if_resolvemulti = firewire_resolvemulti;
761 ifp->if_broadcastaddr = (u_char *) &firewire_broadcastaddr;
762
763 ifa = ifp->if_addr;
764 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
765 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
766 sdl->sdl_type = IFT_IEEE1394;
767 sdl->sdl_alen = ifp->if_addrlen;
768 bcopy(llc, LLADDR(sdl), ifp->if_addrlen);
769
770 bpfattach(ifp, DLT_APPLE_IP_OVER_IEEE1394,
771 sizeof(struct fw_hwaddr));
772
773 if_printf(ifp, "Firewire address: %8D @ 0x%04x%08x, %s, maxrec %d\n",
774 (uint8_t *) &llc->sender_unique_ID_hi, ":",
775 ntohs(llc->sender_unicast_FIFO_hi),
776 ntohl(llc->sender_unicast_FIFO_lo),
777 speeds[llc->sspd],
778 (2 << llc->sender_max_rec));
779 }
780
781 void
782 firewire_ifdetach(struct ifnet *ifp)
783 {
784 bpfdetach(ifp);
785 if_detach(ifp);
786 }
787
788 void
789 firewire_busreset(struct ifnet *ifp)
790 {
791 struct fw_com *fc = IFP2FWC(ifp);
792 struct fw_reass *r;
793 struct mbuf *m;
794
795 /*
796 * Discard any partial datagrams since the host ids may have changed.
797 */
798 while ((r = STAILQ_FIRST(&fc->fc_frags))) {
799 STAILQ_REMOVE_HEAD(&fc->fc_frags, fr_link);
800 while (r->fr_frags) {
801 m = r->fr_frags;
802 r->fr_frags = m->m_nextpkt;
803 m_freem(m);
804 }
805 free(r, M_TEMP);
806 }
807 }
808
809 static void *
810 firewire_alloc(u_char type, struct ifnet *ifp)
811 {
812 struct fw_com *fc;
813
814 fc = malloc(sizeof(struct fw_com), M_FWCOM, M_WAITOK | M_ZERO);
815 fc->fc_ifp = ifp;
816
817 return (fc);
818 }
819
820 static void
821 firewire_free(void *com, u_char type)
822 {
823
824 free(com, M_FWCOM);
825 }
826
827 static int
828 firewire_modevent(module_t mod, int type, void *data)
829 {
830
831 switch (type) {
832 case MOD_LOAD:
833 if_register_com_alloc(IFT_IEEE1394,
834 firewire_alloc, firewire_free);
835 break;
836 case MOD_UNLOAD:
837 if_deregister_com_alloc(IFT_IEEE1394);
838 break;
839 default:
840 return (EOPNOTSUPP);
841 }
842
843 return (0);
844 }
845
846 static moduledata_t firewire_mod = {
847 "if_firewire",
848 firewire_modevent,
849 0
850 };
851
852 DECLARE_MODULE(if_firewire, firewire_mod, SI_SUB_INIT_IF, SI_ORDER_ANY);
853 MODULE_VERSION(if_firewire, 1);
Cache object: 4e30aba7c753c8b083a734eecb5d62d9
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