if_fwsubr.c revision 241394
1139823Simp/*- 2130407Sdfr * Copyright (c) 2004 Doug Rabson 3130407Sdfr * Copyright (c) 1982, 1989, 1993 4130407Sdfr * The Regents of the University of California. All rights reserved. 5130407Sdfr * 6130407Sdfr * Redistribution and use in source and binary forms, with or without 7130407Sdfr * modification, are permitted provided that the following conditions 8130407Sdfr * are met: 9130407Sdfr * 1. Redistributions of source code must retain the above copyright 10130407Sdfr * notice, this list of conditions and the following disclaimer. 11130407Sdfr * 2. Redistributions in binary form must reproduce the above copyright 12130407Sdfr * notice, this list of conditions and the following disclaimer in the 13130407Sdfr * documentation and/or other materials provided with the distribution. 14130407Sdfr * 4. Neither the name of the University nor the names of its contributors 15130407Sdfr * may be used to endorse or promote products derived from this software 16130407Sdfr * without specific prior written permission. 17130407Sdfr * 18130407Sdfr * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19130407Sdfr * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20130407Sdfr * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21130407Sdfr * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22130407Sdfr * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23130407Sdfr * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24130407Sdfr * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25130407Sdfr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26130407Sdfr * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27130407Sdfr * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28130407Sdfr * SUCH DAMAGE. 29130407Sdfr * 30130407Sdfr * $FreeBSD: head/sys/net/if_fwsubr.c 241394 2012-10-10 08:36:38Z kevlo $ 31130407Sdfr */ 32130407Sdfr 33130407Sdfr#include "opt_inet.h" 34130407Sdfr#include "opt_inet6.h" 35130407Sdfr 36130407Sdfr#include <sys/param.h> 37130407Sdfr#include <sys/systm.h> 38130407Sdfr#include <sys/kernel.h> 39130407Sdfr#include <sys/malloc.h> 40130407Sdfr#include <sys/mbuf.h> 41147256Sbrooks#include <sys/module.h> 42130407Sdfr#include <sys/socket.h> 43130407Sdfr#include <sys/sockio.h> 44130407Sdfr 45130407Sdfr#include <net/if.h> 46130407Sdfr#include <net/netisr.h> 47130407Sdfr#include <net/route.h> 48130407Sdfr#include <net/if_llc.h> 49130407Sdfr#include <net/if_dl.h> 50130407Sdfr#include <net/if_types.h> 51130407Sdfr#include <net/bpf.h> 52130407Sdfr#include <net/firewire.h> 53186119Sqingli#include <net/if_llatbl.h> 54130407Sdfr 55130407Sdfr#if defined(INET) || defined(INET6) 56130407Sdfr#include <netinet/in.h> 57130407Sdfr#include <netinet/in_var.h> 58130407Sdfr#include <netinet/if_ether.h> 59130407Sdfr#endif 60130407Sdfr#ifdef INET6 61130407Sdfr#include <netinet6/nd6.h> 62130407Sdfr#endif 63130407Sdfr 64163606Srwatson#include <security/mac/mac_framework.h> 65163606Srwatson 66227293Sedstatic MALLOC_DEFINE(M_FWCOM, "fw_com", "firewire interface internals"); 67147256Sbrooks 68130407Sdfrstruct fw_hwaddr firewire_broadcastaddr = { 69130407Sdfr 0xffffffff, 70130407Sdfr 0xffffffff, 71130407Sdfr 0xff, 72130407Sdfr 0xff, 73130407Sdfr 0xffff, 74130407Sdfr 0xffffffff 75130407Sdfr}; 76130407Sdfr 77130407Sdfrstatic int 78130407Sdfrfirewire_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, 79191148Skmacy struct route *ro) 80130407Sdfr{ 81154209Sbrooks struct fw_com *fc = IFP2FWC(ifp); 82130407Sdfr int error, type; 83130407Sdfr struct m_tag *mtag; 84130407Sdfr union fw_encap *enc; 85130407Sdfr struct fw_hwaddr *destfw; 86130407Sdfr uint8_t speed; 87130407Sdfr uint16_t psize, fsize, dsize; 88130407Sdfr struct mbuf *mtail; 89130407Sdfr int unicast, dgl, foff; 90130407Sdfr static int next_dgl; 91193891Sbz#if defined(INET) || defined(INET6) 92186119Sqingli struct llentry *lle; 93193891Sbz#endif 94130407Sdfr 95130429Sdfr#ifdef MAC 96172930Srwatson error = mac_ifnet_check_transmit(ifp, m); 97130429Sdfr if (error) 98130429Sdfr goto bad; 99130429Sdfr#endif 100130429Sdfr 101148887Srwatson if (!((ifp->if_flags & IFF_UP) && 102148887Srwatson (ifp->if_drv_flags & IFF_DRV_RUNNING))) { 103130407Sdfr error = ENETDOWN; 104130407Sdfr goto bad; 105130407Sdfr } 106130407Sdfr 107130407Sdfr /* 108130407Sdfr * For unicast, we make a tag to store the lladdr of the 109130407Sdfr * destination. This might not be the first time we have seen 110130407Sdfr * the packet (for instance, the arp code might be trying to 111130407Sdfr * re-send it after receiving an arp reply) so we only 112130407Sdfr * allocate a tag if there isn't one there already. For 113130407Sdfr * multicast, we will eventually use a different tag to store 114130407Sdfr * the channel number. 115130407Sdfr */ 116130407Sdfr unicast = !(m->m_flags & (M_BCAST | M_MCAST)); 117130407Sdfr if (unicast) { 118130407Sdfr mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, NULL); 119130407Sdfr if (!mtag) { 120130407Sdfr mtag = m_tag_alloc(MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, 121130407Sdfr sizeof (struct fw_hwaddr), M_NOWAIT); 122130407Sdfr if (!mtag) { 123130407Sdfr error = ENOMEM; 124130407Sdfr goto bad; 125130407Sdfr } 126130407Sdfr m_tag_prepend(m, mtag); 127130407Sdfr } 128130407Sdfr destfw = (struct fw_hwaddr *)(mtag + 1); 129130407Sdfr } else { 130130407Sdfr destfw = 0; 131130407Sdfr } 132130407Sdfr 133130407Sdfr switch (dst->sa_family) { 134184711Sbz#ifdef INET 135130407Sdfr case AF_INET: 136130407Sdfr /* 137130407Sdfr * Only bother with arp for unicast. Allocation of 138130407Sdfr * channels etc. for firewire is quite different and 139130407Sdfr * doesn't fit into the arp model. 140130407Sdfr */ 141130407Sdfr if (unicast) { 142191148Skmacy error = arpresolve(ifp, ro ? ro->ro_rt : NULL, m, dst, (u_char *) destfw, &lle); 143130407Sdfr if (error) 144130407Sdfr return (error == EWOULDBLOCK ? 0 : error); 145130407Sdfr } 146130407Sdfr type = ETHERTYPE_IP; 147130407Sdfr break; 148130407Sdfr 149130407Sdfr case AF_ARP: 150130407Sdfr { 151130407Sdfr struct arphdr *ah; 152130407Sdfr ah = mtod(m, struct arphdr *); 153130407Sdfr ah->ar_hrd = htons(ARPHRD_IEEE1394); 154130407Sdfr type = ETHERTYPE_ARP; 155130407Sdfr if (unicast) 156130407Sdfr *destfw = *(struct fw_hwaddr *) ar_tha(ah); 157130407Sdfr 158130407Sdfr /* 159130407Sdfr * The standard arp code leaves a hole for the target 160130407Sdfr * hardware address which we need to close up. 161130407Sdfr */ 162130407Sdfr bcopy(ar_tpa(ah), ar_tha(ah), ah->ar_pln); 163130407Sdfr m_adj(m, -ah->ar_hln); 164130407Sdfr break; 165130407Sdfr } 166130407Sdfr#endif 167130407Sdfr 168130407Sdfr#ifdef INET6 169130407Sdfr case AF_INET6: 170130407Sdfr if (unicast) { 171186217Sqingli error = nd6_storelladdr(fc->fc_ifp, m, dst, 172186119Sqingli (u_char *) destfw, &lle); 173130407Sdfr if (error) 174130407Sdfr return (error); 175130407Sdfr } 176130407Sdfr type = ETHERTYPE_IPV6; 177130407Sdfr break; 178130407Sdfr#endif 179130407Sdfr 180130407Sdfr default: 181130407Sdfr if_printf(ifp, "can't handle af%d\n", dst->sa_family); 182130407Sdfr error = EAFNOSUPPORT; 183130407Sdfr goto bad; 184130407Sdfr } 185130407Sdfr 186130407Sdfr /* 187130407Sdfr * Let BPF tap off a copy before we encapsulate. 188130407Sdfr */ 189159183Ssam if (bpf_peers_present(ifp->if_bpf)) { 190130407Sdfr struct fw_bpfhdr h; 191130407Sdfr if (unicast) 192130407Sdfr bcopy(destfw, h.firewire_dhost, 8); 193130407Sdfr else 194130407Sdfr bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8); 195130407Sdfr bcopy(&fc->fc_hwaddr, h.firewire_shost, 8); 196130407Sdfr h.firewire_type = htons(type); 197130407Sdfr bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m); 198130407Sdfr } 199130407Sdfr 200130407Sdfr /* 201130407Sdfr * Punt on MCAP for now and send all multicast packets on the 202130407Sdfr * broadcast channel. 203130407Sdfr */ 204130407Sdfr if (m->m_flags & M_MCAST) 205130407Sdfr m->m_flags |= M_BCAST; 206130407Sdfr 207130407Sdfr /* 208130407Sdfr * Figure out what speed to use and what the largest supported 209130407Sdfr * packet size is. For unicast, this is the minimum of what we 210130407Sdfr * can speak and what they can hear. For broadcast, lets be 211130407Sdfr * conservative and use S100. We could possibly improve that 212130407Sdfr * by examining the bus manager's speed map or similar. We 213130407Sdfr * also reduce the packet size for broadcast to account for 214130407Sdfr * the GASP header. 215130407Sdfr */ 216130407Sdfr if (unicast) { 217130407Sdfr speed = min(fc->fc_speed, destfw->sspd); 218130407Sdfr psize = min(512 << speed, 2 << destfw->sender_max_rec); 219130407Sdfr } else { 220130407Sdfr speed = 0; 221130407Sdfr psize = 512 - 2*sizeof(uint32_t); 222130407Sdfr } 223130407Sdfr 224130407Sdfr /* 225130407Sdfr * Next, we encapsulate, possibly fragmenting the original 226130407Sdfr * datagram if it won't fit into a single packet. 227130407Sdfr */ 228130407Sdfr if (m->m_pkthdr.len <= psize - sizeof(uint32_t)) { 229130407Sdfr /* 230130407Sdfr * No fragmentation is necessary. 231130407Sdfr */ 232130407Sdfr M_PREPEND(m, sizeof(uint32_t), M_DONTWAIT); 233130407Sdfr if (!m) { 234130407Sdfr error = ENOBUFS; 235130407Sdfr goto bad; 236130407Sdfr } 237130407Sdfr enc = mtod(m, union fw_encap *); 238130407Sdfr enc->unfrag.ether_type = type; 239130407Sdfr enc->unfrag.lf = FW_ENCAP_UNFRAG; 240144114Sgallatin enc->unfrag.reserved = 0; 241130407Sdfr 242130407Sdfr /* 243130407Sdfr * Byte swap the encapsulation header manually. 244130407Sdfr */ 245130407Sdfr enc->ul[0] = htonl(enc->ul[0]); 246130407Sdfr 247185164Skmacy error = (ifp->if_transmit)(ifp, m); 248130549Smlaier return (error); 249130407Sdfr } else { 250130407Sdfr /* 251130407Sdfr * Fragment the datagram, making sure to leave enough 252130407Sdfr * space for the encapsulation header in each packet. 253130407Sdfr */ 254130407Sdfr fsize = psize - 2*sizeof(uint32_t); 255130407Sdfr dgl = next_dgl++; 256130407Sdfr dsize = m->m_pkthdr.len; 257130407Sdfr foff = 0; 258130407Sdfr while (m) { 259130407Sdfr if (m->m_pkthdr.len > fsize) { 260130407Sdfr /* 261130407Sdfr * Split off the tail segment from the 262130407Sdfr * datagram, copying our tags over. 263130407Sdfr */ 264130407Sdfr mtail = m_split(m, fsize, M_DONTWAIT); 265130407Sdfr m_tag_copy_chain(mtail, m, M_NOWAIT); 266130407Sdfr } else { 267130407Sdfr mtail = 0; 268130407Sdfr } 269130407Sdfr 270130407Sdfr /* 271130407Sdfr * Add our encapsulation header to this 272130407Sdfr * fragment and hand it off to the link. 273130407Sdfr */ 274130407Sdfr M_PREPEND(m, 2*sizeof(uint32_t), M_DONTWAIT); 275130407Sdfr if (!m) { 276130407Sdfr error = ENOBUFS; 277130407Sdfr goto bad; 278130407Sdfr } 279130407Sdfr enc = mtod(m, union fw_encap *); 280130407Sdfr if (foff == 0) { 281130407Sdfr enc->firstfrag.lf = FW_ENCAP_FIRST; 282144114Sgallatin enc->firstfrag.reserved1 = 0; 283144114Sgallatin enc->firstfrag.reserved2 = 0; 284130407Sdfr enc->firstfrag.datagram_size = dsize - 1; 285130407Sdfr enc->firstfrag.ether_type = type; 286130407Sdfr enc->firstfrag.dgl = dgl; 287130407Sdfr } else { 288130407Sdfr if (mtail) 289130407Sdfr enc->nextfrag.lf = FW_ENCAP_NEXT; 290130407Sdfr else 291130407Sdfr enc->nextfrag.lf = FW_ENCAP_LAST; 292144114Sgallatin enc->nextfrag.reserved1 = 0; 293144114Sgallatin enc->nextfrag.reserved2 = 0; 294144114Sgallatin enc->nextfrag.reserved3 = 0; 295130407Sdfr enc->nextfrag.datagram_size = dsize - 1; 296130407Sdfr enc->nextfrag.fragment_offset = foff; 297130407Sdfr enc->nextfrag.dgl = dgl; 298130407Sdfr } 299130407Sdfr foff += m->m_pkthdr.len - 2*sizeof(uint32_t); 300130407Sdfr 301130407Sdfr /* 302130407Sdfr * Byte swap the encapsulation header manually. 303130407Sdfr */ 304130407Sdfr enc->ul[0] = htonl(enc->ul[0]); 305130407Sdfr enc->ul[1] = htonl(enc->ul[1]); 306130407Sdfr 307185164Skmacy error = (ifp->if_transmit)(ifp, m); 308130549Smlaier if (error) { 309130407Sdfr if (mtail) 310130407Sdfr m_freem(mtail); 311130407Sdfr return (ENOBUFS); 312130407Sdfr } 313130407Sdfr 314130407Sdfr m = mtail; 315130407Sdfr } 316130407Sdfr 317130407Sdfr return (0); 318130407Sdfr } 319130407Sdfr 320130407Sdfrbad: 321130407Sdfr if (m) 322130407Sdfr m_freem(m); 323130407Sdfr return (error); 324130407Sdfr} 325130407Sdfr 326130407Sdfrstatic struct mbuf * 327130407Sdfrfirewire_input_fragment(struct fw_com *fc, struct mbuf *m, int src) 328130407Sdfr{ 329130407Sdfr union fw_encap *enc; 330130407Sdfr struct fw_reass *r; 331130407Sdfr struct mbuf *mf, *mprev; 332130407Sdfr int dsize; 333130407Sdfr int fstart, fend, start, end, islast; 334130407Sdfr uint32_t id; 335130407Sdfr 336130407Sdfr /* 337130407Sdfr * Find an existing reassembly buffer or create a new one. 338130407Sdfr */ 339130407Sdfr enc = mtod(m, union fw_encap *); 340130407Sdfr id = enc->firstfrag.dgl | (src << 16); 341130407Sdfr STAILQ_FOREACH(r, &fc->fc_frags, fr_link) 342130407Sdfr if (r->fr_id == id) 343130407Sdfr break; 344130407Sdfr if (!r) { 345130407Sdfr r = malloc(sizeof(struct fw_reass), M_TEMP, M_NOWAIT); 346130407Sdfr if (!r) { 347130407Sdfr m_freem(m); 348130407Sdfr return 0; 349130407Sdfr } 350130407Sdfr r->fr_id = id; 351130407Sdfr r->fr_frags = 0; 352130407Sdfr STAILQ_INSERT_HEAD(&fc->fc_frags, r, fr_link); 353130407Sdfr } 354130407Sdfr 355130407Sdfr /* 356130407Sdfr * If this fragment overlaps any other fragment, we must discard 357130407Sdfr * the partial reassembly and start again. 358130407Sdfr */ 359130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 360130407Sdfr fstart = 0; 361130407Sdfr else 362130407Sdfr fstart = enc->nextfrag.fragment_offset; 363130407Sdfr fend = fstart + m->m_pkthdr.len - 2*sizeof(uint32_t); 364130407Sdfr dsize = enc->nextfrag.datagram_size; 365130407Sdfr islast = (enc->nextfrag.lf == FW_ENCAP_LAST); 366130407Sdfr 367130407Sdfr for (mf = r->fr_frags; mf; mf = mf->m_nextpkt) { 368130407Sdfr enc = mtod(mf, union fw_encap *); 369130407Sdfr if (enc->nextfrag.datagram_size != dsize) { 370130407Sdfr /* 371130407Sdfr * This fragment must be from a different 372130407Sdfr * packet. 373130407Sdfr */ 374130407Sdfr goto bad; 375130407Sdfr } 376130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 377130407Sdfr start = 0; 378130407Sdfr else 379130407Sdfr start = enc->nextfrag.fragment_offset; 380130407Sdfr end = start + mf->m_pkthdr.len - 2*sizeof(uint32_t); 381130407Sdfr if ((fstart < end && fend > start) || 382130407Sdfr (islast && enc->nextfrag.lf == FW_ENCAP_LAST)) { 383130407Sdfr /* 384130407Sdfr * Overlap - discard reassembly buffer and start 385130407Sdfr * again with this fragment. 386130407Sdfr */ 387130407Sdfr goto bad; 388130407Sdfr } 389130407Sdfr } 390130407Sdfr 391130407Sdfr /* 392130407Sdfr * Find where to put this fragment in the list. 393130407Sdfr */ 394130407Sdfr for (mf = r->fr_frags, mprev = NULL; mf; 395130407Sdfr mprev = mf, mf = mf->m_nextpkt) { 396130407Sdfr enc = mtod(mf, union fw_encap *); 397130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 398130407Sdfr start = 0; 399130407Sdfr else 400130407Sdfr start = enc->nextfrag.fragment_offset; 401130407Sdfr if (start >= fend) 402130407Sdfr break; 403130407Sdfr } 404130407Sdfr 405130407Sdfr /* 406130407Sdfr * If this is a last fragment and we are not adding at the end 407130407Sdfr * of the list, discard the buffer. 408130407Sdfr */ 409130407Sdfr if (islast && mprev && mprev->m_nextpkt) 410130407Sdfr goto bad; 411130407Sdfr 412130407Sdfr if (mprev) { 413130407Sdfr m->m_nextpkt = mprev->m_nextpkt; 414130407Sdfr mprev->m_nextpkt = m; 415130407Sdfr 416130407Sdfr /* 417130407Sdfr * Coalesce forwards and see if we can make a whole 418130407Sdfr * datagram. 419130407Sdfr */ 420130407Sdfr enc = mtod(mprev, union fw_encap *); 421130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 422130407Sdfr start = 0; 423130407Sdfr else 424130407Sdfr start = enc->nextfrag.fragment_offset; 425130407Sdfr end = start + mprev->m_pkthdr.len - 2*sizeof(uint32_t); 426130407Sdfr while (end == fstart) { 427130407Sdfr /* 428130407Sdfr * Strip off the encap header from m and 429130407Sdfr * append it to mprev, freeing m. 430130407Sdfr */ 431130407Sdfr m_adj(m, 2*sizeof(uint32_t)); 432130407Sdfr mprev->m_nextpkt = m->m_nextpkt; 433130407Sdfr mprev->m_pkthdr.len += m->m_pkthdr.len; 434130407Sdfr m_cat(mprev, m); 435130407Sdfr 436130407Sdfr if (mprev->m_pkthdr.len == dsize + 1 + 2*sizeof(uint32_t)) { 437130407Sdfr /* 438130407Sdfr * We have assembled a complete packet 439130407Sdfr * we must be finished. Make sure we have 440130407Sdfr * merged the whole chain. 441130407Sdfr */ 442130407Sdfr STAILQ_REMOVE(&fc->fc_frags, r, fw_reass, fr_link); 443130407Sdfr free(r, M_TEMP); 444130407Sdfr m = mprev->m_nextpkt; 445130407Sdfr while (m) { 446130407Sdfr mf = m->m_nextpkt; 447130407Sdfr m_freem(m); 448130407Sdfr m = mf; 449130407Sdfr } 450130407Sdfr mprev->m_nextpkt = NULL; 451130407Sdfr 452130407Sdfr return (mprev); 453130407Sdfr } 454130407Sdfr 455130407Sdfr /* 456130407Sdfr * See if we can continue merging forwards. 457130407Sdfr */ 458130407Sdfr end = fend; 459130407Sdfr m = mprev->m_nextpkt; 460130407Sdfr if (m) { 461130407Sdfr enc = mtod(m, union fw_encap *); 462130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 463130407Sdfr fstart = 0; 464130407Sdfr else 465130407Sdfr fstart = enc->nextfrag.fragment_offset; 466130407Sdfr fend = fstart + m->m_pkthdr.len 467130407Sdfr - 2*sizeof(uint32_t); 468130407Sdfr } else { 469130407Sdfr break; 470130407Sdfr } 471130407Sdfr } 472130407Sdfr } else { 473130407Sdfr m->m_nextpkt = 0; 474130407Sdfr r->fr_frags = m; 475130407Sdfr } 476130407Sdfr 477130407Sdfr return (0); 478130407Sdfr 479130407Sdfrbad: 480130407Sdfr while (r->fr_frags) { 481130407Sdfr mf = r->fr_frags; 482130407Sdfr r->fr_frags = mf->m_nextpkt; 483130407Sdfr m_freem(mf); 484130407Sdfr } 485130407Sdfr m->m_nextpkt = 0; 486130407Sdfr r->fr_frags = m; 487130407Sdfr 488130407Sdfr return (0); 489130407Sdfr} 490130407Sdfr 491130407Sdfrvoid 492130407Sdfrfirewire_input(struct ifnet *ifp, struct mbuf *m, uint16_t src) 493130407Sdfr{ 494154209Sbrooks struct fw_com *fc = IFP2FWC(ifp); 495130407Sdfr union fw_encap *enc; 496130407Sdfr int type, isr; 497130407Sdfr 498130407Sdfr /* 499130407Sdfr * The caller has already stripped off the packet header 500130407Sdfr * (stream or wreqb) and marked the mbuf's M_BCAST flag 501130407Sdfr * appropriately. We de-encapsulate the IP packet and pass it 502130407Sdfr * up the line after handling link-level fragmentation. 503130407Sdfr */ 504130407Sdfr if (m->m_pkthdr.len < sizeof(uint32_t)) { 505130407Sdfr if_printf(ifp, "discarding frame without " 506130407Sdfr "encapsulation header (len %u pkt len %u)\n", 507130407Sdfr m->m_len, m->m_pkthdr.len); 508130407Sdfr } 509130407Sdfr 510130407Sdfr m = m_pullup(m, sizeof(uint32_t)); 511169735Srwatson if (m == NULL) 512169735Srwatson return; 513130407Sdfr enc = mtod(m, union fw_encap *); 514130407Sdfr 515130407Sdfr /* 516130407Sdfr * Byte swap the encapsulation header manually. 517130407Sdfr */ 518151265Simp enc->ul[0] = ntohl(enc->ul[0]); 519130407Sdfr 520130407Sdfr if (enc->unfrag.lf != 0) { 521130407Sdfr m = m_pullup(m, 2*sizeof(uint32_t)); 522130407Sdfr if (!m) 523130407Sdfr return; 524130407Sdfr enc = mtod(m, union fw_encap *); 525151265Simp enc->ul[1] = ntohl(enc->ul[1]); 526130407Sdfr m = firewire_input_fragment(fc, m, src); 527130407Sdfr if (!m) 528130407Sdfr return; 529130407Sdfr enc = mtod(m, union fw_encap *); 530130407Sdfr type = enc->firstfrag.ether_type; 531130407Sdfr m_adj(m, 2*sizeof(uint32_t)); 532130407Sdfr } else { 533130407Sdfr type = enc->unfrag.ether_type; 534130407Sdfr m_adj(m, sizeof(uint32_t)); 535130407Sdfr } 536130407Sdfr 537130407Sdfr if (m->m_pkthdr.rcvif == NULL) { 538130407Sdfr if_printf(ifp, "discard frame w/o interface pointer\n"); 539130407Sdfr ifp->if_ierrors++; 540130407Sdfr m_freem(m); 541130407Sdfr return; 542130407Sdfr } 543130407Sdfr#ifdef DIAGNOSTIC 544130407Sdfr if (m->m_pkthdr.rcvif != ifp) { 545130407Sdfr if_printf(ifp, "Warning, frame marked as received on %s\n", 546130407Sdfr m->m_pkthdr.rcvif->if_xname); 547130407Sdfr } 548130407Sdfr#endif 549130407Sdfr 550130407Sdfr#ifdef MAC 551130407Sdfr /* 552130407Sdfr * Tag the mbuf with an appropriate MAC label before any other 553130407Sdfr * consumers can get to it. 554130407Sdfr */ 555172930Srwatson mac_ifnet_create_mbuf(ifp, m); 556130407Sdfr#endif 557130407Sdfr 558130407Sdfr /* 559130407Sdfr * Give bpf a chance at the packet. The link-level driver 560130407Sdfr * should have left us a tag with the EUID of the sender. 561130407Sdfr */ 562159183Ssam if (bpf_peers_present(ifp->if_bpf)) { 563130407Sdfr struct fw_bpfhdr h; 564130407Sdfr struct m_tag *mtag; 565130407Sdfr 566130407Sdfr mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_SENDER_EUID, 0); 567130407Sdfr if (mtag) 568130407Sdfr bcopy(mtag + 1, h.firewire_shost, 8); 569130407Sdfr else 570130407Sdfr bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8); 571130407Sdfr bcopy(&fc->fc_hwaddr, h.firewire_dhost, 8); 572130407Sdfr h.firewire_type = htons(type); 573130407Sdfr bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m); 574130407Sdfr } 575130407Sdfr 576130407Sdfr if (ifp->if_flags & IFF_MONITOR) { 577130407Sdfr /* 578130407Sdfr * Interface marked for monitoring; discard packet. 579130407Sdfr */ 580130407Sdfr m_freem(m); 581130407Sdfr return; 582130407Sdfr } 583130407Sdfr 584130407Sdfr ifp->if_ibytes += m->m_pkthdr.len; 585130407Sdfr 586130407Sdfr /* Discard packet if interface is not up */ 587130407Sdfr if ((ifp->if_flags & IFF_UP) == 0) { 588130407Sdfr m_freem(m); 589130407Sdfr return; 590130407Sdfr } 591130407Sdfr 592130407Sdfr if (m->m_flags & (M_BCAST|M_MCAST)) 593130407Sdfr ifp->if_imcasts++; 594130407Sdfr 595130407Sdfr switch (type) { 596130407Sdfr#ifdef INET 597130407Sdfr case ETHERTYPE_IP: 598154518Sandre if ((m = ip_fastforward(m)) == NULL) 599130407Sdfr return; 600130407Sdfr isr = NETISR_IP; 601130407Sdfr break; 602130407Sdfr 603130407Sdfr case ETHERTYPE_ARP: 604130407Sdfr { 605130407Sdfr struct arphdr *ah; 606130407Sdfr ah = mtod(m, struct arphdr *); 607130407Sdfr 608130407Sdfr /* 609130407Sdfr * Adjust the arp packet to insert an empty tha slot. 610130407Sdfr */ 611130407Sdfr m->m_len += ah->ar_hln; 612130407Sdfr m->m_pkthdr.len += ah->ar_hln; 613130407Sdfr bcopy(ar_tha(ah), ar_tpa(ah), ah->ar_pln); 614130407Sdfr isr = NETISR_ARP; 615130407Sdfr break; 616130407Sdfr } 617130407Sdfr#endif 618130407Sdfr 619130407Sdfr#ifdef INET6 620130407Sdfr case ETHERTYPE_IPV6: 621130407Sdfr isr = NETISR_IPV6; 622130407Sdfr break; 623130407Sdfr#endif 624130407Sdfr 625130407Sdfr default: 626130407Sdfr m_freem(m); 627130407Sdfr return; 628130407Sdfr } 629130407Sdfr 630223741Sbz M_SETFIB(m, ifp->if_fib); 631130407Sdfr netisr_dispatch(isr, m); 632130407Sdfr} 633130407Sdfr 634130407Sdfrint 635194581Srdivackyfirewire_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 636130407Sdfr{ 637130407Sdfr struct ifaddr *ifa = (struct ifaddr *) data; 638130407Sdfr struct ifreq *ifr = (struct ifreq *) data; 639130407Sdfr int error = 0; 640130407Sdfr 641130407Sdfr switch (command) { 642130407Sdfr case SIOCSIFADDR: 643130407Sdfr ifp->if_flags |= IFF_UP; 644130407Sdfr 645130407Sdfr switch (ifa->ifa_addr->sa_family) { 646130407Sdfr#ifdef INET 647130407Sdfr case AF_INET: 648130407Sdfr ifp->if_init(ifp->if_softc); /* before arpwhohas */ 649130407Sdfr arp_ifinit(ifp, ifa); 650130407Sdfr break; 651130407Sdfr#endif 652130407Sdfr default: 653130407Sdfr ifp->if_init(ifp->if_softc); 654130407Sdfr break; 655130407Sdfr } 656130407Sdfr break; 657130407Sdfr 658130407Sdfr case SIOCGIFADDR: 659130407Sdfr { 660130407Sdfr struct sockaddr *sa; 661130407Sdfr 662130407Sdfr sa = (struct sockaddr *) & ifr->ifr_data; 663154209Sbrooks bcopy(&IFP2FWC(ifp)->fc_hwaddr, 664130407Sdfr (caddr_t) sa->sa_data, sizeof(struct fw_hwaddr)); 665130407Sdfr } 666130407Sdfr break; 667130407Sdfr 668130407Sdfr case SIOCSIFMTU: 669130407Sdfr /* 670130407Sdfr * Set the interface MTU. 671130407Sdfr */ 672130407Sdfr if (ifr->ifr_mtu > 1500) { 673130407Sdfr error = EINVAL; 674130407Sdfr } else { 675130407Sdfr ifp->if_mtu = ifr->ifr_mtu; 676130407Sdfr } 677130407Sdfr break; 678130407Sdfr default: 679130407Sdfr error = EINVAL; /* XXX netbsd has ENOTTY??? */ 680130407Sdfr break; 681130407Sdfr } 682130407Sdfr return (error); 683130407Sdfr} 684130407Sdfr 685130407Sdfrstatic int 686130407Sdfrfirewire_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 687130407Sdfr struct sockaddr *sa) 688130407Sdfr{ 689130407Sdfr#ifdef INET 690130407Sdfr struct sockaddr_in *sin; 691130407Sdfr#endif 692130407Sdfr#ifdef INET6 693130407Sdfr struct sockaddr_in6 *sin6; 694130407Sdfr#endif 695130407Sdfr 696130407Sdfr switch(sa->sa_family) { 697130407Sdfr case AF_LINK: 698130407Sdfr /* 699130407Sdfr * No mapping needed. 700130407Sdfr */ 701130407Sdfr *llsa = 0; 702130407Sdfr return 0; 703130407Sdfr 704130407Sdfr#ifdef INET 705130407Sdfr case AF_INET: 706130407Sdfr sin = (struct sockaddr_in *)sa; 707130407Sdfr if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 708130407Sdfr return EADDRNOTAVAIL; 709130407Sdfr *llsa = 0; 710130407Sdfr return 0; 711130407Sdfr#endif 712130407Sdfr#ifdef INET6 713130407Sdfr case AF_INET6: 714130407Sdfr sin6 = (struct sockaddr_in6 *)sa; 715130407Sdfr if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 716130407Sdfr /* 717130407Sdfr * An IP6 address of 0 means listen to all 718130407Sdfr * of the Ethernet multicast address used for IP6. 719130407Sdfr * (This is used for multicast routers.) 720130407Sdfr */ 721130407Sdfr ifp->if_flags |= IFF_ALLMULTI; 722130407Sdfr *llsa = 0; 723130407Sdfr return 0; 724130407Sdfr } 725130407Sdfr if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 726130407Sdfr return EADDRNOTAVAIL; 727130407Sdfr *llsa = 0; 728130407Sdfr return 0; 729130407Sdfr#endif 730130407Sdfr 731130407Sdfr default: 732130407Sdfr /* 733130407Sdfr * Well, the text isn't quite right, but it's the name 734130407Sdfr * that counts... 735130407Sdfr */ 736130407Sdfr return EAFNOSUPPORT; 737130407Sdfr } 738130407Sdfr} 739130407Sdfr 740130407Sdfrvoid 741130407Sdfrfirewire_ifattach(struct ifnet *ifp, struct fw_hwaddr *llc) 742130407Sdfr{ 743154209Sbrooks struct fw_com *fc = IFP2FWC(ifp); 744130407Sdfr struct ifaddr *ifa; 745130407Sdfr struct sockaddr_dl *sdl; 746130407Sdfr static const char* speeds[] = { 747130407Sdfr "S100", "S200", "S400", "S800", 748130407Sdfr "S1600", "S3200" 749130407Sdfr }; 750130407Sdfr 751130407Sdfr fc->fc_speed = llc->sspd; 752130407Sdfr STAILQ_INIT(&fc->fc_frags); 753130407Sdfr 754130407Sdfr ifp->if_addrlen = sizeof(struct fw_hwaddr); 755130407Sdfr ifp->if_hdrlen = 0; 756130407Sdfr if_attach(ifp); 757130407Sdfr ifp->if_mtu = 1500; /* XXX */ 758130407Sdfr ifp->if_output = firewire_output; 759130407Sdfr ifp->if_resolvemulti = firewire_resolvemulti; 760130407Sdfr ifp->if_broadcastaddr = (u_char *) &firewire_broadcastaddr; 761130407Sdfr 762152315Sru ifa = ifp->if_addr; 763130407Sdfr KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 764130407Sdfr sdl = (struct sockaddr_dl *)ifa->ifa_addr; 765130407Sdfr sdl->sdl_type = IFT_IEEE1394; 766130407Sdfr sdl->sdl_alen = ifp->if_addrlen; 767130407Sdfr bcopy(llc, LLADDR(sdl), ifp->if_addrlen); 768130407Sdfr 769130407Sdfr bpfattach(ifp, DLT_APPLE_IP_OVER_IEEE1394, 770130407Sdfr sizeof(struct fw_hwaddr)); 771130407Sdfr 772130407Sdfr if_printf(ifp, "Firewire address: %8D @ 0x%04x%08x, %s, maxrec %d\n", 773130407Sdfr (uint8_t *) &llc->sender_unique_ID_hi, ":", 774130407Sdfr ntohs(llc->sender_unicast_FIFO_hi), 775130407Sdfr ntohl(llc->sender_unicast_FIFO_lo), 776130407Sdfr speeds[llc->sspd], 777130407Sdfr (2 << llc->sender_max_rec)); 778130407Sdfr} 779130407Sdfr 780130407Sdfrvoid 781130407Sdfrfirewire_ifdetach(struct ifnet *ifp) 782130407Sdfr{ 783130407Sdfr bpfdetach(ifp); 784130407Sdfr if_detach(ifp); 785130407Sdfr} 786130407Sdfr 787130407Sdfrvoid 788130407Sdfrfirewire_busreset(struct ifnet *ifp) 789130407Sdfr{ 790154209Sbrooks struct fw_com *fc = IFP2FWC(ifp); 791130407Sdfr struct fw_reass *r; 792130407Sdfr struct mbuf *m; 793130407Sdfr 794130407Sdfr /* 795130407Sdfr * Discard any partial datagrams since the host ids may have changed. 796130407Sdfr */ 797130407Sdfr while ((r = STAILQ_FIRST(&fc->fc_frags))) { 798130407Sdfr STAILQ_REMOVE_HEAD(&fc->fc_frags, fr_link); 799130407Sdfr while (r->fr_frags) { 800130407Sdfr m = r->fr_frags; 801130407Sdfr r->fr_frags = m->m_nextpkt; 802130407Sdfr m_freem(m); 803130407Sdfr } 804130407Sdfr free(r, M_TEMP); 805130407Sdfr } 806130407Sdfr} 807147256Sbrooks 808147256Sbrooksstatic void * 809147256Sbrooksfirewire_alloc(u_char type, struct ifnet *ifp) 810147256Sbrooks{ 811147256Sbrooks struct fw_com *fc; 812147256Sbrooks 813147256Sbrooks fc = malloc(sizeof(struct fw_com), M_FWCOM, M_WAITOK | M_ZERO); 814147256Sbrooks fc->fc_ifp = ifp; 815147256Sbrooks 816147256Sbrooks return (fc); 817147256Sbrooks} 818147256Sbrooks 819147256Sbrooksstatic void 820147256Sbrooksfirewire_free(void *com, u_char type) 821147256Sbrooks{ 822147256Sbrooks 823147256Sbrooks free(com, M_FWCOM); 824147256Sbrooks} 825147256Sbrooks 826147256Sbrooksstatic int 827147256Sbrooksfirewire_modevent(module_t mod, int type, void *data) 828147256Sbrooks{ 829147256Sbrooks 830147256Sbrooks switch (type) { 831147256Sbrooks case MOD_LOAD: 832147256Sbrooks if_register_com_alloc(IFT_IEEE1394, 833147256Sbrooks firewire_alloc, firewire_free); 834147256Sbrooks break; 835147256Sbrooks case MOD_UNLOAD: 836147256Sbrooks if_deregister_com_alloc(IFT_IEEE1394); 837147256Sbrooks break; 838147256Sbrooks default: 839147256Sbrooks return (EOPNOTSUPP); 840147256Sbrooks } 841147256Sbrooks 842147256Sbrooks return (0); 843147256Sbrooks} 844147256Sbrooks 845147256Sbrooksstatic moduledata_t firewire_mod = { 846150988Savatar "if_firewire", 847147256Sbrooks firewire_modevent, 848241394Skevlo 0 849147256Sbrooks}; 850147256Sbrooks 851150988SavatarDECLARE_MODULE(if_firewire, firewire_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 852150988SavatarMODULE_VERSION(if_firewire, 1); 853