The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/net/if_fwsubr.c

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    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/10.1/sys/net/if_fwsubr.c 249925 2013-04-26 12:50:32Z glebius $
   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/netisr.h>
   47 #include <net/route.h>
   48 #include <net/if_llc.h>
   49 #include <net/if_dl.h>
   50 #include <net/if_types.h>
   51 #include <net/bpf.h>
   52 #include <net/firewire.h>
   53 #include <net/if_llatbl.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 static 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, const struct sockaddr *dst,
   79     struct route *ro)
   80 {
   81         struct fw_com *fc = IFP2FWC(ifp);
   82         int error, type;
   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 #if defined(INET) || defined(INET6)
   92         struct llentry *lle;
   93 #endif
   94 
   95 #ifdef MAC
   96         error = mac_ifnet_check_transmit(ifp, m);
   97         if (error)
   98                 goto bad;
   99 #endif
  100 
  101         if (!((ifp->if_flags & IFF_UP) &&
  102            (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
  103                 error = ENETDOWN;
  104                 goto bad;
  105         }
  106 
  107         /*
  108          * For unicast, we make a tag to store the lladdr of the
  109          * destination. This might not be the first time we have seen
  110          * the packet (for instance, the arp code might be trying to
  111          * re-send it after receiving an arp reply) so we only
  112          * allocate a tag if there isn't one there already. For
  113          * multicast, we will eventually use a different tag to store
  114          * the channel number.
  115          */
  116         unicast = !(m->m_flags & (M_BCAST | M_MCAST));
  117         if (unicast) {
  118                 mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, NULL);
  119                 if (!mtag) {
  120                         mtag = m_tag_alloc(MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR,
  121                             sizeof (struct fw_hwaddr), M_NOWAIT);
  122                         if (!mtag) {
  123                                 error = ENOMEM;
  124                                 goto bad;
  125                         }
  126                         m_tag_prepend(m, mtag);
  127                 }
  128                 destfw = (struct fw_hwaddr *)(mtag + 1);
  129         } else {
  130                 destfw = 0;
  131         }
  132 
  133         switch (dst->sa_family) {
  134 #ifdef INET
  135         case AF_INET:
  136                 /*
  137                  * Only bother with arp for unicast. Allocation of
  138                  * channels etc. for firewire is quite different and
  139                  * doesn't fit into the arp model.
  140                  */
  141                 if (unicast) {
  142                         error = arpresolve(ifp, ro ? ro->ro_rt : NULL, m, dst, (u_char *) destfw, &lle);
  143                         if (error)
  144                                 return (error == EWOULDBLOCK ? 0 : error);
  145                 }
  146                 type = ETHERTYPE_IP;
  147                 break;
  148 
  149         case AF_ARP:
  150         {
  151                 struct arphdr *ah;
  152                 ah = mtod(m, struct arphdr *);
  153                 ah->ar_hrd = htons(ARPHRD_IEEE1394);
  154                 type = ETHERTYPE_ARP;
  155                 if (unicast)
  156                         *destfw = *(struct fw_hwaddr *) ar_tha(ah);
  157 
  158                 /*
  159                  * The standard arp code leaves a hole for the target
  160                  * hardware address which we need to close up.
  161                  */
  162                 bcopy(ar_tpa(ah), ar_tha(ah), ah->ar_pln);
  163                 m_adj(m, -ah->ar_hln);
  164                 break;
  165         }
  166 #endif
  167 
  168 #ifdef INET6
  169         case AF_INET6:
  170                 if (unicast) {
  171                         error = nd6_storelladdr(fc->fc_ifp, m, dst,
  172                             (u_char *) destfw, &lle);
  173                         if (error)
  174                                 return (error);
  175                 }
  176                 type = ETHERTYPE_IPV6;
  177                 break;
  178 #endif
  179 
  180         default:
  181                 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
  182                 error = EAFNOSUPPORT;
  183                 goto bad;
  184         }
  185 
  186         /*
  187          * Let BPF tap off a copy before we encapsulate.
  188          */
  189         if (bpf_peers_present(ifp->if_bpf)) {
  190                 struct fw_bpfhdr h;
  191                 if (unicast)
  192                         bcopy(destfw, h.firewire_dhost, 8);
  193                 else
  194                         bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8);
  195                 bcopy(&fc->fc_hwaddr, h.firewire_shost, 8);
  196                 h.firewire_type = htons(type);
  197                 bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m);
  198         }
  199 
  200         /*
  201          * Punt on MCAP for now and send all multicast packets on the
  202          * broadcast channel.
  203          */
  204         if (m->m_flags & M_MCAST)
  205                 m->m_flags |= M_BCAST;
  206 
  207         /*
  208          * Figure out what speed to use and what the largest supported
  209          * packet size is. For unicast, this is the minimum of what we
  210          * can speak and what they can hear. For broadcast, lets be
  211          * conservative and use S100. We could possibly improve that
  212          * by examining the bus manager's speed map or similar. We
  213          * also reduce the packet size for broadcast to account for
  214          * the GASP header.
  215          */
  216         if (unicast) {
  217                 speed = min(fc->fc_speed, destfw->sspd);
  218                 psize = min(512 << speed, 2 << destfw->sender_max_rec);
  219         } else {
  220                 speed = 0;
  221                 psize = 512 - 2*sizeof(uint32_t);
  222         }
  223 
  224         /*
  225          * Next, we encapsulate, possibly fragmenting the original
  226          * datagram if it won't fit into a single packet.
  227          */
  228         if (m->m_pkthdr.len <= psize - sizeof(uint32_t)) {
  229                 /*
  230                  * No fragmentation is necessary.
  231                  */
  232                 M_PREPEND(m, sizeof(uint32_t), M_NOWAIT);
  233                 if (!m) {
  234                         error = ENOBUFS;
  235                         goto bad;
  236                 }
  237                 enc = mtod(m, union fw_encap *);
  238                 enc->unfrag.ether_type = type;
  239                 enc->unfrag.lf = FW_ENCAP_UNFRAG;
  240                 enc->unfrag.reserved = 0;
  241 
  242                 /*
  243                  * Byte swap the encapsulation header manually.
  244                  */
  245                 enc->ul[0] = htonl(enc->ul[0]);
  246 
  247                 error = (ifp->if_transmit)(ifp, m);
  248                 return (error);
  249         } else {
  250                 /*
  251                  * Fragment the datagram, making sure to leave enough
  252                  * space for the encapsulation header in each packet.
  253                  */
  254                 fsize = psize - 2*sizeof(uint32_t);
  255                 dgl = next_dgl++;
  256                 dsize = m->m_pkthdr.len;
  257                 foff = 0;
  258                 while (m) {
  259                         if (m->m_pkthdr.len > fsize) {
  260                                 /*
  261                                  * Split off the tail segment from the
  262                                  * datagram, copying our tags over.
  263                                  */
  264                                 mtail = m_split(m, fsize, M_NOWAIT);
  265                                 m_tag_copy_chain(mtail, m, M_NOWAIT);
  266                         } else {
  267                                 mtail = 0;
  268                         }
  269 
  270                         /*
  271                          * Add our encapsulation header to this
  272                          * fragment and hand it off to the link.
  273                          */
  274                         M_PREPEND(m, 2*sizeof(uint32_t), M_NOWAIT);
  275                         if (!m) {
  276                                 error = ENOBUFS;
  277                                 goto bad;
  278                         }
  279                         enc = mtod(m, union fw_encap *);
  280                         if (foff == 0) {
  281                                 enc->firstfrag.lf = FW_ENCAP_FIRST;
  282                                 enc->firstfrag.reserved1 = 0;
  283                                 enc->firstfrag.reserved2 = 0;
  284                                 enc->firstfrag.datagram_size = dsize - 1;
  285                                 enc->firstfrag.ether_type = type;
  286                                 enc->firstfrag.dgl = dgl;
  287                         } else {
  288                                 if (mtail)
  289                                         enc->nextfrag.lf = FW_ENCAP_NEXT;
  290                                 else
  291                                         enc->nextfrag.lf = FW_ENCAP_LAST;
  292                                 enc->nextfrag.reserved1 = 0;
  293                                 enc->nextfrag.reserved2 = 0;
  294                                 enc->nextfrag.reserved3 = 0;
  295                                 enc->nextfrag.datagram_size = dsize - 1;
  296                                 enc->nextfrag.fragment_offset = foff;
  297                                 enc->nextfrag.dgl = dgl;
  298                         }
  299                         foff += m->m_pkthdr.len - 2*sizeof(uint32_t);
  300 
  301                         /*
  302                          * Byte swap the encapsulation header manually.
  303                          */
  304                         enc->ul[0] = htonl(enc->ul[0]);
  305                         enc->ul[1] = htonl(enc->ul[1]);
  306 
  307                         error = (ifp->if_transmit)(ifp, m);
  308                         if (error) {
  309                                 if (mtail)
  310                                         m_freem(mtail);
  311                                 return (ENOBUFS);
  312                         }
  313 
  314                         m = mtail;
  315                 }
  316 
  317                 return (0);
  318         }
  319 
  320 bad:
  321         if (m)
  322                 m_freem(m);
  323         return (error);
  324 }
  325 
  326 static struct mbuf *
  327 firewire_input_fragment(struct fw_com *fc, struct mbuf *m, int src)
  328 {
  329         union fw_encap *enc;
  330         struct fw_reass *r;
  331         struct mbuf *mf, *mprev;
  332         int dsize;
  333         int fstart, fend, start, end, islast;
  334         uint32_t id;
  335 
  336         /*
  337          * Find an existing reassembly buffer or create a new one.
  338          */
  339         enc = mtod(m, union fw_encap *);
  340         id = enc->firstfrag.dgl | (src << 16);
  341         STAILQ_FOREACH(r, &fc->fc_frags, fr_link)
  342                 if (r->fr_id == id)
  343                         break;
  344         if (!r) {
  345                 r = malloc(sizeof(struct fw_reass), M_TEMP, M_NOWAIT);
  346                 if (!r) {
  347                         m_freem(m);
  348                         return 0;
  349                 }
  350                 r->fr_id = id;
  351                 r->fr_frags = 0;
  352                 STAILQ_INSERT_HEAD(&fc->fc_frags, r, fr_link);
  353         }
  354 
  355         /*
  356          * If this fragment overlaps any other fragment, we must discard
  357          * the partial reassembly and start again.
  358          */
  359         if (enc->firstfrag.lf == FW_ENCAP_FIRST)
  360                 fstart = 0;
  361         else
  362                 fstart = enc->nextfrag.fragment_offset;
  363         fend = fstart + m->m_pkthdr.len - 2*sizeof(uint32_t);
  364         dsize = enc->nextfrag.datagram_size;
  365         islast = (enc->nextfrag.lf == FW_ENCAP_LAST);
  366 
  367         for (mf = r->fr_frags; mf; mf = mf->m_nextpkt) {
  368                 enc = mtod(mf, union fw_encap *);
  369                 if (enc->nextfrag.datagram_size != dsize) {
  370                         /*
  371                          * This fragment must be from a different
  372                          * packet.
  373                          */
  374                         goto bad;
  375                 }
  376                 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
  377                         start = 0;
  378                 else
  379                         start = enc->nextfrag.fragment_offset;
  380                 end = start + mf->m_pkthdr.len - 2*sizeof(uint32_t);
  381                 if ((fstart < end && fend > start) ||
  382                     (islast && enc->nextfrag.lf == FW_ENCAP_LAST)) {
  383                         /*
  384                          * Overlap - discard reassembly buffer and start
  385                          * again with this fragment.
  386                          */
  387                         goto bad;
  388                 }
  389         }
  390 
  391         /*
  392          * Find where to put this fragment in the list.
  393          */
  394         for (mf = r->fr_frags, mprev = NULL; mf;
  395             mprev = mf, mf = mf->m_nextpkt) {
  396                 enc = mtod(mf, union fw_encap *);
  397                 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
  398                         start = 0;
  399                 else
  400                         start = enc->nextfrag.fragment_offset;
  401                 if (start >= fend)
  402                         break;
  403         }
  404 
  405         /*
  406          * If this is a last fragment and we are not adding at the end
  407          * of the list, discard the buffer.
  408          */
  409         if (islast && mprev && mprev->m_nextpkt)
  410                 goto bad;
  411 
  412         if (mprev) {
  413                 m->m_nextpkt = mprev->m_nextpkt;
  414                 mprev->m_nextpkt = m;
  415 
  416                 /*
  417                  * Coalesce forwards and see if we can make a whole
  418                  * datagram.
  419                  */
  420                 enc = mtod(mprev, union fw_encap *);
  421                 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
  422                         start = 0;
  423                 else
  424                         start = enc->nextfrag.fragment_offset;
  425                 end = start + mprev->m_pkthdr.len - 2*sizeof(uint32_t);
  426                 while (end == fstart) {
  427                         /*
  428                          * Strip off the encap header from m and
  429                          * append it to mprev, freeing m.
  430                          */
  431                         m_adj(m, 2*sizeof(uint32_t));
  432                         mprev->m_nextpkt = m->m_nextpkt;
  433                         mprev->m_pkthdr.len += m->m_pkthdr.len;
  434                         m_cat(mprev, m);
  435 
  436                         if (mprev->m_pkthdr.len == dsize + 1 + 2*sizeof(uint32_t)) {
  437                                 /*
  438                                  * We have assembled a complete packet
  439                                  * we must be finished. Make sure we have
  440                                  * merged the whole chain.
  441                                  */
  442                                 STAILQ_REMOVE(&fc->fc_frags, r, fw_reass, fr_link);
  443                                 free(r, M_TEMP);
  444                                 m = mprev->m_nextpkt;
  445                                 while (m) {
  446                                         mf = m->m_nextpkt;
  447                                         m_freem(m);
  448                                         m = mf;
  449                                 }
  450                                 mprev->m_nextpkt = NULL;
  451 
  452                                 return (mprev);
  453                         }
  454 
  455                         /*
  456                          * See if we can continue merging forwards.
  457                          */
  458                         end = fend;
  459                         m = mprev->m_nextpkt;
  460                         if (m) {
  461                                 enc = mtod(m, union fw_encap *);
  462                                 if (enc->firstfrag.lf == FW_ENCAP_FIRST)
  463                                         fstart = 0;
  464                                 else
  465                                         fstart = enc->nextfrag.fragment_offset;
  466                                 fend = fstart + m->m_pkthdr.len
  467                                     - 2*sizeof(uint32_t);
  468                         } else {
  469                                 break;
  470                         }
  471                 }
  472         } else {
  473                 m->m_nextpkt = 0;
  474                 r->fr_frags = m;
  475         }
  476 
  477         return (0);
  478 
  479 bad:
  480         while (r->fr_frags) {
  481                 mf = r->fr_frags;
  482                 r->fr_frags = mf->m_nextpkt;
  483                 m_freem(mf);
  484         }
  485         m->m_nextpkt = 0;
  486         r->fr_frags = m;
  487 
  488         return (0);
  489 }
  490 
  491 void
  492 firewire_input(struct ifnet *ifp, struct mbuf *m, uint16_t src)
  493 {
  494         struct fw_com *fc = IFP2FWC(ifp);
  495         union fw_encap *enc;
  496         int type, isr;
  497 
  498         /*
  499          * The caller has already stripped off the packet header
  500          * (stream or wreqb) and marked the mbuf's M_BCAST flag
  501          * appropriately. We de-encapsulate the IP packet and pass it
  502          * up the line after handling link-level fragmentation.
  503          */
  504         if (m->m_pkthdr.len < sizeof(uint32_t)) {
  505                 if_printf(ifp, "discarding frame without "
  506                     "encapsulation header (len %u pkt len %u)\n",
  507                     m->m_len, m->m_pkthdr.len);
  508         }
  509 
  510         m = m_pullup(m, sizeof(uint32_t));
  511         if (m == NULL)
  512                 return;
  513         enc = mtod(m, union fw_encap *);
  514 
  515         /*
  516          * Byte swap the encapsulation header manually.
  517          */
  518         enc->ul[0] = ntohl(enc->ul[0]);
  519 
  520         if (enc->unfrag.lf != 0) {
  521                 m = m_pullup(m, 2*sizeof(uint32_t));
  522                 if (!m)
  523                         return;
  524                 enc = mtod(m, union fw_encap *);
  525                 enc->ul[1] = ntohl(enc->ul[1]);
  526                 m = firewire_input_fragment(fc, m, src);
  527                 if (!m)
  528                         return;
  529                 enc = mtod(m, union fw_encap *);
  530                 type = enc->firstfrag.ether_type;
  531                 m_adj(m, 2*sizeof(uint32_t));
  532         } else {
  533                 type = enc->unfrag.ether_type;
  534                 m_adj(m, sizeof(uint32_t));
  535         }
  536 
  537         if (m->m_pkthdr.rcvif == NULL) {
  538                 if_printf(ifp, "discard frame w/o interface pointer\n");
  539                 ifp->if_ierrors++;
  540                 m_freem(m);
  541                 return;
  542         }
  543 #ifdef DIAGNOSTIC
  544         if (m->m_pkthdr.rcvif != ifp) {
  545                 if_printf(ifp, "Warning, frame marked as received on %s\n",
  546                         m->m_pkthdr.rcvif->if_xname);
  547         }
  548 #endif
  549 
  550 #ifdef MAC
  551         /*
  552          * Tag the mbuf with an appropriate MAC label before any other
  553          * consumers can get to it.
  554          */
  555         mac_ifnet_create_mbuf(ifp, m);
  556 #endif
  557 
  558         /*
  559          * Give bpf a chance at the packet. The link-level driver
  560          * should have left us a tag with the EUID of the sender.
  561          */
  562         if (bpf_peers_present(ifp->if_bpf)) {
  563                 struct fw_bpfhdr h;
  564                 struct m_tag *mtag;
  565 
  566                 mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_SENDER_EUID, 0);
  567                 if (mtag)
  568                         bcopy(mtag + 1, h.firewire_shost, 8);
  569                 else
  570                         bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8);
  571                 bcopy(&fc->fc_hwaddr, h.firewire_dhost, 8);
  572                 h.firewire_type = htons(type);
  573                 bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m);
  574         }
  575 
  576         if (ifp->if_flags & IFF_MONITOR) {
  577                 /*
  578                  * Interface marked for monitoring; discard packet.
  579                  */
  580                 m_freem(m);
  581                 return;
  582         }
  583 
  584         ifp->if_ibytes += m->m_pkthdr.len;
  585 
  586         /* Discard packet if interface is not up */
  587         if ((ifp->if_flags & IFF_UP) == 0) {
  588                 m_freem(m);
  589                 return;
  590         }
  591 
  592         if (m->m_flags & (M_BCAST|M_MCAST))
  593                 ifp->if_imcasts++;
  594 
  595         switch (type) {
  596 #ifdef INET
  597         case ETHERTYPE_IP:
  598                 if ((m = ip_fastforward(m)) == NULL)
  599                         return;
  600                 isr = NETISR_IP;
  601                 break;
  602 
  603         case ETHERTYPE_ARP:
  604         {
  605                 struct arphdr *ah;
  606                 ah = mtod(m, struct arphdr *);
  607 
  608                 /*
  609                  * Adjust the arp packet to insert an empty tha slot.
  610                  */
  611                 m->m_len += ah->ar_hln;
  612                 m->m_pkthdr.len += ah->ar_hln;
  613                 bcopy(ar_tha(ah), ar_tpa(ah), ah->ar_pln);
  614                 isr = NETISR_ARP;
  615                 break;
  616         }
  617 #endif
  618 
  619 #ifdef INET6
  620         case ETHERTYPE_IPV6:
  621                 isr = NETISR_IPV6;
  622                 break;
  623 #endif
  624 
  625         default:
  626                 m_freem(m);
  627                 return;
  628         }
  629 
  630         M_SETFIB(m, ifp->if_fib);
  631         netisr_dispatch(isr, m);
  632 }
  633 
  634 int
  635 firewire_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
  636 {
  637         struct ifaddr *ifa = (struct ifaddr *) data;
  638         struct ifreq *ifr = (struct ifreq *) data;
  639         int error = 0;
  640 
  641         switch (command) {
  642         case SIOCSIFADDR:
  643                 ifp->if_flags |= IFF_UP;
  644 
  645                 switch (ifa->ifa_addr->sa_family) {
  646 #ifdef INET
  647                 case AF_INET:
  648                         ifp->if_init(ifp->if_softc);    /* before arpwhohas */
  649                         arp_ifinit(ifp, ifa);
  650                         break;
  651 #endif
  652                 default:
  653                         ifp->if_init(ifp->if_softc);
  654                         break;
  655                 }
  656                 break;
  657 
  658         case SIOCGIFADDR:
  659                 {
  660                         struct sockaddr *sa;
  661 
  662                         sa = (struct sockaddr *) & ifr->ifr_data;
  663                         bcopy(&IFP2FWC(ifp)->fc_hwaddr,
  664                             (caddr_t) sa->sa_data, sizeof(struct fw_hwaddr));
  665                 }
  666                 break;
  667 
  668         case SIOCSIFMTU:
  669                 /*
  670                  * Set the interface MTU.
  671                  */
  672                 if (ifr->ifr_mtu > 1500) {
  673                         error = EINVAL;
  674                 } else {
  675                         ifp->if_mtu = ifr->ifr_mtu;
  676                 }
  677                 break;
  678         default:
  679                 error = EINVAL;                 /* XXX netbsd has ENOTTY??? */
  680                 break;
  681         }
  682         return (error);
  683 }
  684 
  685 static int
  686 firewire_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa,
  687     struct sockaddr *sa)
  688 {
  689 #ifdef INET
  690         struct sockaddr_in *sin;
  691 #endif
  692 #ifdef INET6
  693         struct sockaddr_in6 *sin6;
  694 #endif
  695 
  696         switch(sa->sa_family) {
  697         case AF_LINK:
  698                 /*
  699                  * No mapping needed.
  700                  */
  701                 *llsa = 0;
  702                 return 0;
  703 
  704 #ifdef INET
  705         case AF_INET:
  706                 sin = (struct sockaddr_in *)sa;
  707                 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
  708                         return EADDRNOTAVAIL;
  709                 *llsa = 0;
  710                 return 0;
  711 #endif
  712 #ifdef INET6
  713         case AF_INET6:
  714                 sin6 = (struct sockaddr_in6 *)sa;
  715                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
  716                         /*
  717                          * An IP6 address of 0 means listen to all
  718                          * of the Ethernet multicast address used for IP6.
  719                          * (This is used for multicast routers.)
  720                          */
  721                         ifp->if_flags |= IFF_ALLMULTI;
  722                         *llsa = 0;
  723                         return 0;
  724                 }
  725                 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
  726                         return EADDRNOTAVAIL;
  727                 *llsa = 0;
  728                 return 0;
  729 #endif
  730 
  731         default:
  732                 /*
  733                  * Well, the text isn't quite right, but it's the name
  734                  * that counts...
  735                  */
  736                 return EAFNOSUPPORT;
  737         }
  738 }
  739 
  740 void
  741 firewire_ifattach(struct ifnet *ifp, struct fw_hwaddr *llc)
  742 {
  743         struct fw_com *fc = IFP2FWC(ifp);
  744         struct ifaddr *ifa;
  745         struct sockaddr_dl *sdl;
  746         static const char* speeds[] = {
  747                 "S100", "S200", "S400", "S800",
  748                 "S1600", "S3200"
  749         };
  750 
  751         fc->fc_speed = llc->sspd;
  752         STAILQ_INIT(&fc->fc_frags);
  753 
  754         ifp->if_addrlen = sizeof(struct fw_hwaddr);
  755         ifp->if_hdrlen = 0;
  756         if_attach(ifp);
  757         ifp->if_mtu = 1500;     /* XXX */
  758         ifp->if_output = firewire_output;
  759         ifp->if_resolvemulti = firewire_resolvemulti;
  760         ifp->if_broadcastaddr = (u_char *) &firewire_broadcastaddr;
  761 
  762         ifa = ifp->if_addr;
  763         KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
  764         sdl = (struct sockaddr_dl *)ifa->ifa_addr;
  765         sdl->sdl_type = IFT_IEEE1394;
  766         sdl->sdl_alen = ifp->if_addrlen;
  767         bcopy(llc, LLADDR(sdl), ifp->if_addrlen);
  768 
  769         bpfattach(ifp, DLT_APPLE_IP_OVER_IEEE1394,
  770             sizeof(struct fw_hwaddr));
  771 
  772         if_printf(ifp, "Firewire address: %8D @ 0x%04x%08x, %s, maxrec %d\n",
  773             (uint8_t *) &llc->sender_unique_ID_hi, ":",
  774             ntohs(llc->sender_unicast_FIFO_hi),
  775             ntohl(llc->sender_unicast_FIFO_lo),
  776             speeds[llc->sspd],
  777             (2 << llc->sender_max_rec));
  778 }
  779 
  780 void
  781 firewire_ifdetach(struct ifnet *ifp)
  782 {
  783         bpfdetach(ifp);
  784         if_detach(ifp);
  785 }
  786 
  787 void
  788 firewire_busreset(struct ifnet *ifp)
  789 {
  790         struct fw_com *fc = IFP2FWC(ifp);
  791         struct fw_reass *r;
  792         struct mbuf *m;
  793 
  794         /*
  795          * Discard any partial datagrams since the host ids may have changed.
  796          */
  797         while ((r = STAILQ_FIRST(&fc->fc_frags))) {
  798                 STAILQ_REMOVE_HEAD(&fc->fc_frags, fr_link);
  799                 while (r->fr_frags) {
  800                         m = r->fr_frags;
  801                         r->fr_frags = m->m_nextpkt;
  802                         m_freem(m);
  803                 }
  804                 free(r, M_TEMP);
  805         }
  806 }
  807 
  808 static void *
  809 firewire_alloc(u_char type, struct ifnet *ifp)
  810 {
  811         struct fw_com   *fc;
  812 
  813         fc = malloc(sizeof(struct fw_com), M_FWCOM, M_WAITOK | M_ZERO);
  814         fc->fc_ifp = ifp;
  815 
  816         return (fc);
  817 }
  818 
  819 static void
  820 firewire_free(void *com, u_char type)
  821 {
  822 
  823         free(com, M_FWCOM);
  824 }
  825 
  826 static int
  827 firewire_modevent(module_t mod, int type, void *data)
  828 {
  829 
  830         switch (type) {
  831         case MOD_LOAD:
  832                 if_register_com_alloc(IFT_IEEE1394,
  833                     firewire_alloc, firewire_free);
  834                 break;
  835         case MOD_UNLOAD:
  836                 if_deregister_com_alloc(IFT_IEEE1394);
  837                 break;
  838         default:
  839                 return (EOPNOTSUPP);
  840         }
  841 
  842         return (0);
  843 }
  844 
  845 static moduledata_t firewire_mod = {
  846         "if_firewire",
  847         firewire_modevent,
  848         0
  849 };
  850 
  851 DECLARE_MODULE(if_firewire, firewire_mod, SI_SUB_INIT_IF, SI_ORDER_ANY);
  852 MODULE_VERSION(if_firewire, 1);

Cache object: 21df79c6d148e343f50bffc55bd5a440


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