FreeBSD/Linux Kernel Cross Reference
sys/net/if_fwsubr.c
1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2004 Doug Rabson
5 * Copyright (c) 1982, 1989, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $FreeBSD$
33 */
34
35 #include "opt_inet.h"
36 #include "opt_inet6.h"
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/kernel.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/if_var.h>
49 #include <net/netisr.h>
50 #include <net/route.h>
51 #include <net/if_llc.h>
52 #include <net/if_dl.h>
53 #include <net/if_types.h>
54 #include <net/bpf.h>
55 #include <net/firewire.h>
56 #include <net/if_llatbl.h>
57
58 #if defined(INET) || defined(INET6)
59 #include <netinet/in.h>
60 #include <netinet/in_var.h>
61 #include <netinet/if_ether.h>
62 #endif
63 #ifdef INET6
64 #include <netinet6/nd6.h>
65 #endif
66
67 #include <security/mac/mac_framework.h>
68
69 static MALLOC_DEFINE(M_FWCOM, "fw_com", "firewire interface internals");
70
71 struct fw_hwaddr firewire_broadcastaddr = {
72 0xffffffff,
73 0xffffffff,
74 0xff,
75 0xff,
76 0xffff,
77 0xffffffff
78 };
79
80 static int
81 firewire_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
82 struct route *ro)
83 {
84 struct fw_com *fc = IFP2FWC(ifp);
85 int error, type;
86 struct m_tag *mtag;
87 union fw_encap *enc;
88 struct fw_hwaddr *destfw;
89 uint8_t speed;
90 uint16_t psize, fsize, dsize;
91 struct mbuf *mtail;
92 int unicast, dgl, foff;
93 static int next_dgl;
94 #if defined(INET) || defined(INET6)
95 int is_gw = 0;
96 #endif
97
98 #ifdef MAC
99 error = mac_ifnet_check_transmit(ifp, m);
100 if (error)
101 goto bad;
102 #endif
103
104 if (!((ifp->if_flags & IFF_UP) &&
105 (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
106 error = ENETDOWN;
107 goto bad;
108 }
109
110 #if defined(INET) || defined(INET6)
111 if (ro != NULL)
112 is_gw = (ro->ro_flags & RT_HAS_GW) != 0;
113 #endif
114 /*
115 * For unicast, we make a tag to store the lladdr of the
116 * destination. This might not be the first time we have seen
117 * the packet (for instance, the arp code might be trying to
118 * re-send it after receiving an arp reply) so we only
119 * allocate a tag if there isn't one there already. For
120 * multicast, we will eventually use a different tag to store
121 * the channel number.
122 */
123 unicast = !(m->m_flags & (M_BCAST | M_MCAST));
124 if (unicast) {
125 mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, NULL);
126 if (!mtag) {
127 mtag = m_tag_alloc(MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR,
128 sizeof (struct fw_hwaddr), M_NOWAIT);
129 if (!mtag) {
130 error = ENOMEM;
131 goto bad;
132 }
133 m_tag_prepend(m, mtag);
134 }
135 destfw = (struct fw_hwaddr *)(mtag + 1);
136 } else {
137 destfw = NULL;
138 }
139
140 switch (dst->sa_family) {
141 #ifdef INET
142 case AF_INET:
143 /*
144 * Only bother with arp for unicast. Allocation of
145 * channels etc. for firewire is quite different and
146 * doesn't fit into the arp model.
147 */
148 if (unicast) {
149 error = arpresolve(ifp, is_gw, m, dst,
150 (u_char *) destfw, NULL, NULL);
151 if (error)
152 return (error == EWOULDBLOCK ? 0 : error);
153 }
154 type = ETHERTYPE_IP;
155 break;
156
157 case AF_ARP:
158 {
159 struct arphdr *ah;
160 ah = mtod(m, struct arphdr *);
161 ah->ar_hrd = htons(ARPHRD_IEEE1394);
162 type = ETHERTYPE_ARP;
163 if (unicast)
164 *destfw = *(struct fw_hwaddr *) ar_tha(ah);
165
166 /*
167 * The standard arp code leaves a hole for the target
168 * hardware address which we need to close up.
169 */
170 bcopy(ar_tpa(ah), ar_tha(ah), ah->ar_pln);
171 m_adj(m, -ah->ar_hln);
172 break;
173 }
174 #endif
175
176 #ifdef INET6
177 case AF_INET6:
178 if (unicast) {
179 error = nd6_resolve(fc->fc_ifp, is_gw, m, dst,
180 (u_char *) destfw, NULL, NULL);
181 if (error)
182 return (error == EWOULDBLOCK ? 0 : error);
183 }
184 type = ETHERTYPE_IPV6;
185 break;
186 #endif
187
188 default:
189 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
190 error = EAFNOSUPPORT;
191 goto bad;
192 }
193
194 /*
195 * Let BPF tap off a copy before we encapsulate.
196 */
197 if (bpf_peers_present(ifp->if_bpf)) {
198 struct fw_bpfhdr h;
199 if (unicast)
200 bcopy(destfw, h.firewire_dhost, 8);
201 else
202 bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8);
203 bcopy(&fc->fc_hwaddr, h.firewire_shost, 8);
204 h.firewire_type = htons(type);
205 bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m);
206 }
207
208 /*
209 * Punt on MCAP for now and send all multicast packets on the
210 * broadcast channel.
211 */
212 if (m->m_flags & M_MCAST)
213 m->m_flags |= M_BCAST;
214
215 /*
216 * Figure out what speed to use and what the largest supported
217 * packet size is. For unicast, this is the minimum of what we
218 * can speak and what they can hear. For broadcast, lets be
219 * conservative and use S100. We could possibly improve that
220 * by examining the bus manager's speed map or similar. We
221 * also reduce the packet size for broadcast to account for
222 * the GASP header.
223 */
224 if (unicast) {
225 speed = min(fc->fc_speed, destfw->sspd);
226 psize = min(512 << speed, 2 << destfw->sender_max_rec);
227 } else {
228 speed = 0;
229 psize = 512 - 2*sizeof(uint32_t);
230 }
231
232 /*
233 * Next, we encapsulate, possibly fragmenting the original
234 * datagram if it won't fit into a single packet.
235 */
236 if (m->m_pkthdr.len <= psize - sizeof(uint32_t)) {
237 /*
238 * No fragmentation is necessary.
239 */
240 M_PREPEND(m, sizeof(uint32_t), M_NOWAIT);
241 if (!m) {
242 error = ENOBUFS;
243 goto bad;
244 }
245 enc = mtod(m, union fw_encap *);
246 enc->unfrag.ether_type = type;
247 enc->unfrag.lf = FW_ENCAP_UNFRAG;
248 enc->unfrag.reserved = 0;
249
250 /*
251 * Byte swap the encapsulation header manually.
252 */
253 enc->ul[0] = htonl(enc->ul[0]);
254
255 error = (ifp->if_transmit)(ifp, m);
256 return (error);
257 } else {
258 /*
259 * Fragment the datagram, making sure to leave enough
260 * space for the encapsulation header in each packet.
261 */
262 fsize = psize - 2*sizeof(uint32_t);
263 dgl = next_dgl++;
264 dsize = m->m_pkthdr.len;
265 foff = 0;
266 while (m) {
267 if (m->m_pkthdr.len > fsize) {
268 /*
269 * Split off the tail segment from the
270 * datagram, copying our tags over.
271 */
272 mtail = m_split(m, fsize, M_NOWAIT);
273 m_tag_copy_chain(mtail, m, M_NOWAIT);
274 } else {
275 mtail = NULL;
276 }
277
278 /*
279 * Add our encapsulation header to this
280 * fragment and hand it off to the link.
281 */
282 M_PREPEND(m, 2*sizeof(uint32_t), M_NOWAIT);
283 if (!m) {
284 error = ENOBUFS;
285 goto bad;
286 }
287 enc = mtod(m, union fw_encap *);
288 if (foff == 0) {
289 enc->firstfrag.lf = FW_ENCAP_FIRST;
290 enc->firstfrag.reserved1 = 0;
291 enc->firstfrag.reserved2 = 0;
292 enc->firstfrag.datagram_size = dsize - 1;
293 enc->firstfrag.ether_type = type;
294 enc->firstfrag.dgl = dgl;
295 } else {
296 if (mtail)
297 enc->nextfrag.lf = FW_ENCAP_NEXT;
298 else
299 enc->nextfrag.lf = FW_ENCAP_LAST;
300 enc->nextfrag.reserved1 = 0;
301 enc->nextfrag.reserved2 = 0;
302 enc->nextfrag.reserved3 = 0;
303 enc->nextfrag.datagram_size = dsize - 1;
304 enc->nextfrag.fragment_offset = foff;
305 enc->nextfrag.dgl = dgl;
306 }
307 foff += m->m_pkthdr.len - 2*sizeof(uint32_t);
308
309 /*
310 * Byte swap the encapsulation header manually.
311 */
312 enc->ul[0] = htonl(enc->ul[0]);
313 enc->ul[1] = htonl(enc->ul[1]);
314
315 error = (ifp->if_transmit)(ifp, m);
316 if (error) {
317 if (mtail)
318 m_freem(mtail);
319 return (ENOBUFS);
320 }
321
322 m = mtail;
323 }
324
325 return (0);
326 }
327
328 bad:
329 if (m)
330 m_freem(m);
331 return (error);
332 }
333
334 static struct mbuf *
335 firewire_input_fragment(struct fw_com *fc, struct mbuf *m, int src)
336 {
337 union fw_encap *enc;
338 struct fw_reass *r;
339 struct mbuf *mf, *mprev;
340 int dsize;
341 int fstart, fend, start, end, islast;
342 uint32_t id;
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 = IFP2FWC(ifp);
503 union fw_encap *enc;
504 int type, isr;
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 if (m == NULL)
520 return;
521 enc = mtod(m, union fw_encap *);
522
523 /*
524 * Byte swap the encapsulation header manually.
525 */
526 enc->ul[0] = ntohl(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] = ntohl(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 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
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_ifnet_create_mbuf(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 (bpf_peers_present(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 if_inc_counter(ifp, IFCOUNTER_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 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
602
603 switch (type) {
604 #ifdef INET
605 case ETHERTYPE_IP:
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 M_SETFIB(m, ifp->if_fib);
637 CURVNET_SET_QUIET(ifp->if_vnet);
638 netisr_dispatch(isr, m);
639 CURVNET_RESTORE();
640 }
641
642 int
643 firewire_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
644 {
645 struct ifaddr *ifa = (struct ifaddr *) data;
646 struct ifreq *ifr = (struct ifreq *) data;
647 int error = 0;
648
649 switch (command) {
650 case SIOCSIFADDR:
651 ifp->if_flags |= IFF_UP;
652
653 switch (ifa->ifa_addr->sa_family) {
654 #ifdef INET
655 case AF_INET:
656 ifp->if_init(ifp->if_softc); /* before arpwhohas */
657 arp_ifinit(ifp, ifa);
658 break;
659 #endif
660 default:
661 ifp->if_init(ifp->if_softc);
662 break;
663 }
664 break;
665
666 case SIOCGIFADDR:
667 bcopy(&IFP2FWC(ifp)->fc_hwaddr, &ifr->ifr_addr.sa_data[0],
668 sizeof(struct fw_hwaddr));
669 break;
670
671 case SIOCSIFMTU:
672 /*
673 * Set the interface MTU.
674 */
675 if (ifr->ifr_mtu > 1500) {
676 error = EINVAL;
677 } else {
678 ifp->if_mtu = ifr->ifr_mtu;
679 }
680 break;
681 default:
682 error = EINVAL; /* XXX netbsd has ENOTTY??? */
683 break;
684 }
685 return (error);
686 }
687
688 static int
689 firewire_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa,
690 struct sockaddr *sa)
691 {
692 #ifdef INET
693 struct sockaddr_in *sin;
694 #endif
695 #ifdef INET6
696 struct sockaddr_in6 *sin6;
697 #endif
698
699 switch(sa->sa_family) {
700 case AF_LINK:
701 /*
702 * No mapping needed.
703 */
704 *llsa = NULL;
705 return 0;
706
707 #ifdef INET
708 case AF_INET:
709 sin = (struct sockaddr_in *)sa;
710 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
711 return EADDRNOTAVAIL;
712 *llsa = NULL;
713 return 0;
714 #endif
715 #ifdef INET6
716 case AF_INET6:
717 sin6 = (struct sockaddr_in6 *)sa;
718 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
719 /*
720 * An IP6 address of 0 means listen to all
721 * of the Ethernet multicast address used for IP6.
722 * (This is used for multicast routers.)
723 */
724 ifp->if_flags |= IFF_ALLMULTI;
725 *llsa = NULL;
726 return 0;
727 }
728 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
729 return EADDRNOTAVAIL;
730 *llsa = NULL;
731 return 0;
732 #endif
733
734 default:
735 /*
736 * Well, the text isn't quite right, but it's the name
737 * that counts...
738 */
739 return EAFNOSUPPORT;
740 }
741 }
742
743 void
744 firewire_ifattach(struct ifnet *ifp, struct fw_hwaddr *llc)
745 {
746 struct fw_com *fc = IFP2FWC(ifp);
747 struct ifaddr *ifa;
748 struct sockaddr_dl *sdl;
749 static const char* speeds[] = {
750 "S100", "S200", "S400", "S800",
751 "S1600", "S3200"
752 };
753
754 fc->fc_speed = llc->sspd;
755 STAILQ_INIT(&fc->fc_frags);
756
757 ifp->if_addrlen = sizeof(struct fw_hwaddr);
758 ifp->if_hdrlen = 0;
759 if_attach(ifp);
760 ifp->if_mtu = 1500; /* XXX */
761 ifp->if_output = firewire_output;
762 ifp->if_resolvemulti = firewire_resolvemulti;
763 ifp->if_broadcastaddr = (u_char *) &firewire_broadcastaddr;
764
765 ifa = ifp->if_addr;
766 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
767 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
768 sdl->sdl_type = IFT_IEEE1394;
769 sdl->sdl_alen = ifp->if_addrlen;
770 bcopy(llc, LLADDR(sdl), ifp->if_addrlen);
771
772 bpfattach(ifp, DLT_APPLE_IP_OVER_IEEE1394,
773 sizeof(struct fw_hwaddr));
774
775 if_printf(ifp, "Firewire address: %8D @ 0x%04x%08x, %s, maxrec %d\n",
776 (uint8_t *) &llc->sender_unique_ID_hi, ":",
777 ntohs(llc->sender_unicast_FIFO_hi),
778 ntohl(llc->sender_unicast_FIFO_lo),
779 speeds[llc->sspd],
780 (2 << llc->sender_max_rec));
781 }
782
783 void
784 firewire_ifdetach(struct ifnet *ifp)
785 {
786 bpfdetach(ifp);
787 if_detach(ifp);
788 }
789
790 void
791 firewire_busreset(struct ifnet *ifp)
792 {
793 struct fw_com *fc = IFP2FWC(ifp);
794 struct fw_reass *r;
795 struct mbuf *m;
796
797 /*
798 * Discard any partial datagrams since the host ids may have changed.
799 */
800 while ((r = STAILQ_FIRST(&fc->fc_frags))) {
801 STAILQ_REMOVE_HEAD(&fc->fc_frags, fr_link);
802 while (r->fr_frags) {
803 m = r->fr_frags;
804 r->fr_frags = m->m_nextpkt;
805 m_freem(m);
806 }
807 free(r, M_TEMP);
808 }
809 }
810
811 static void *
812 firewire_alloc(u_char type, struct ifnet *ifp)
813 {
814 struct fw_com *fc;
815
816 fc = malloc(sizeof(struct fw_com), M_FWCOM, M_WAITOK | M_ZERO);
817 fc->fc_ifp = ifp;
818
819 return (fc);
820 }
821
822 static void
823 firewire_free(void *com, u_char type)
824 {
825
826 free(com, M_FWCOM);
827 }
828
829 static int
830 firewire_modevent(module_t mod, int type, void *data)
831 {
832
833 switch (type) {
834 case MOD_LOAD:
835 if_register_com_alloc(IFT_IEEE1394,
836 firewire_alloc, firewire_free);
837 break;
838 case MOD_UNLOAD:
839 if_deregister_com_alloc(IFT_IEEE1394);
840 break;
841 default:
842 return (EOPNOTSUPP);
843 }
844
845 return (0);
846 }
847
848 static moduledata_t firewire_mod = {
849 "if_firewire",
850 firewire_modevent,
851 0
852 };
853
854 DECLARE_MODULE(if_firewire, firewire_mod, SI_SUB_INIT_IF, SI_ORDER_ANY);
855 MODULE_VERSION(if_firewire, 1);
Cache object: 6b498ef6603b7a24e39c1bf7d5a66151
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